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Manufacturing method of differential pressure type polyester resin sampling device

发布日期:2020-01-07 13:11 Document serial number: 19641805 Release date: 2020-01-07 13:11
Manufacturing method of differential pressure type polyester resin sampling device

The invention relates to the technical field of polyester resin production, and in particular to a differential pressure type polyester resin sampling device.



Background technique:

The production of polyester resin is generally carried out in a reaction kettle. When the reaction kettle is working, the interior is evacuated and the internal temperature is relatively high. In order to ensure the quality of the product, sample extraction inspections are performed periodically to extract samples. Previously, the reactor had to be deflated and cooled down, otherwise the internal high temperature could easily hurt people. However, this series of operations took a long time, and the vacuum state was suddenly released, which would easily affect the quality of the polyester resin, and thus outweigh the benefits.

Therefore, we have proposed a differential pressure polyester resin sampling device to solve the above problems. The high temperature polyester resin in the reactor is sampled by using the pressure difference without releasing the vacuum of the reactor, thereby ensuring the remaining polyester. The quality of the resin.



Technical realization elements:

In order to achieve the technical purpose, the present invention adopts the following technical solution: a differential pressure type polyester resin sampling device including a sampling tube, the left side of the sampling tube is fixedly connected with a uniformly distributed protrusion, and the left side of the sampling tube is provided with a stable Pressure hole, the middle part of the left side of the sampling tube is fixedly connected with a filter element that is fixedly connected to the middle part of the pressure stabilizing hole. The top and bottom of the middle part of the sampling tube are provided with a feeding port, and both sides of the inside of the feeding port are fixedly connected with elastic pieces. The inside of the two elastic pieces are fixedly connected with a block that is movably connected to the middle of the feeding port. A discharge port is opened at the top of the sampling tube and near the right side of the feeding port. A connecting rod is movably connected to the middle of the sampling tube. The middle part of the connecting rod is fixedly connected with a flexible air pipe that runs through and extends to the right side of the connecting rod. The top of the connecting rod and near the left side of the soft gas tube is fixedly connected with a filter element two. The middle part of the connecting rod is fixedly connected with a piston one. Piston two is fixedly connected to the left side, and a heat conducting ring is fixedly connected to the inner side of piston one and piston two. Heating is fixedly connected to the inner side of piston one and two near the heat conducting ring. , A piston and piston near the two middle and inner heating wires are fixedly connected with a temperature control means;

The temperature control device includes a conductive block, an iron piece is fixedly connected to the outside of the conductive block through a conductive post, and a copper piece is fixedly connected to the outside of the iron piece.

The invention has the following beneficial effects:

1. This differential pressure type polyester resin sampling device uses the flexible air pipe with the combination of piston one and piston two. When sampling, connect the flexible air pipe to the vacuum pump, and use the vacuum pump to draw the space between piston one and piston two to the air pressure. The vacuum space is smaller than the pressure of the reactor, then move the connecting rod to the right, press the polyester resin from the reaction kettle into the sampling tube using the pressure difference, continue to move the connecting rod to the right after taking the sample, and the soft gas tube reconnects with the The pressure pump is connected to pressurize the inside, so that the internal air pressure is higher than the air pressure outside the discharge port, so that the polyester resin can be discharged from the discharge port, thereby achieving the effect of sampling by pressure difference. The sampler is fixedly connected to the reaction kettle. There is no need to release the vacuum state of the reaction kettle, and the quality of the remaining polyester resin is guaranteed.

2. The differential pressure type polyester resin sampling device, through the cooperation of filter element 1 and filter element 2, during the sampling process, piston two will move to the right. In order to balance the pressure of the sampling tube, the pressure regulating hole plays a role of balancing pressure. And the protruding block increases the contact area on the left side of the sampling tube to prevent the polyester resin from being blocked by the pressure regulating hole. At the same time, the filter element 1 can effectively prevent the polyester resin from entering the inside of the sampling tube. Similarly, the filter element 2 can prevent the polyester resin. It enters the soft gas pipe, thereby achieving the effect of ensuring the normal use of the sampling tube, ensuring the clean inside of the sampling tube, and extending the service life of the sampling tube.

Further, the material of the sampling tube is steel and the maximum inner diameter of the sampling tube is smaller than the outer diameter of the piston 1. The material of the projection is the same as the material of the sampling tube and the surface of the projection is coated with lubricant to prevent polyester The resin adheres to the surface of the bump.

Further, the diameter of the stabilizing hole is 0.5-1 ㎜, the shape of the filter element 1 is the same as the left side of the sampling tube, and the thickness of the filter element 1 is a quarter of the thickness of the left side of the sampling tube.

Further, the minimum diameter of the feeding port is smaller than the diameter of the block, the shape of the elastic piece is a rectangular parallelepiped and the material of the elastic piece is steel, and a sealing rubber is fixedly connected to the outside of the block.

Further, the middle part of the connecting rod is provided with an “l” -shaped hole adapted to the flexible air pipe, and the right side of the connecting rod is fixedly connected with the moving mechanism. Pressure and vacuum pumps.

Further, a contact is provided on the inner side of the conductive block, a thermal expansion coefficient of the iron piece is smaller than a thermal expansion coefficient of the copper piece, and a contact adapted to the conductive block is fixedly connected on the inner side of the iron piece.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a partially enlarged structure diagram of part a in FIG. 1 of the present invention; FIG.

FIG. 3 is a partially enlarged structure diagram of part b in FIG. 1 of the present invention; FIG.

4 is a schematic diagram of a feeding structure of a sampling tube according to the present invention;

5 is a schematic diagram of a discharging structure of a sampling tube according to the present invention;

FIG. 6 is a schematic structural diagram of a temperature control device according to the present invention.

In the picture: 1 sampling tube, 2 protruding block, 3 regulator hole, 4 filter element 1, 5 feed port, 6 shrapnel, 7 block, 8 discharge port, 9 connecting rod, 10 flexible gas tube, 11 filter element 2, 12 Piston one, 13 piston two, 14 thermally conductive ring, 15 heating wire, 16 temperature control device, 161 conductive block, 162 iron sheet, 163 copper sheet.

detailed description

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to Figure 1-6. A differential pressure type polyester resin sampling device includes a sampling tube 1. The sampling tube 1 plays a role of sampling and discharging a sample. The material of the sampling tube 1 is steel and the maximum of the sampling tube 1 is The inner diameter is smaller than the outer diameter of the piston 1-12. The material of the projection 2 is the same as that of the sampling tube 1. The surface of the projection 2 is coated with a lubricant to prevent the polyester resin from sticking to the surface of the projection 2. The left side of the sampling tube 1 Uniformly distributed bumps 2 are fixedly connected on the side. The bumps 2 increase the contact area to prevent the pressure regulating hole 3 from being blocked. The left side of the sampling tube 1 is provided with a voltage regulating hole 3, and the voltage regulating hole 3 plays a balanced sampling. The effect of the atmospheric pressure between the left side of the inside of the tube 1 and the inside of the reactor, the diameter of the pressure regulating hole 3 is 0.5-1㎜, the shape of the filter element 4 is the same as the left side of the sampling tube 1, and the thickness of the filter element 4 is the sampling tube 1. One-fourth of the thickness on the left side. The middle part on the left side of the sampling tube 1 is fixedly connected with a filter element 4 that is fixedly connected to the middle part of the pressure regulating hole 3. The filter element 4 can effectively prevent polyester resin from entering the sampling tube 1. 1 The top and bottom of the middle part are provided with a feed port 5, and the polyester resin can be accessed through the feed port 5. In the tube 1, the minimum diameter of the inlet 5 is smaller than the diameter of the block 7. The shape of the elastic piece 6 is a rectangular parallelepiped and the material of the elastic piece 6 is steel. The sealing rubber is fixedly connected to the outside of the block 7. 5 are fixedly connected to both sides on the inner side of the spring 5, and the spring 6 plays a role of ejecting the block 7 from the feeding port 5 and the discharging port 8.

The inside of the two elastic pieces 6 are fixedly connected with a blocking block 7 which is movably connected to the middle of the feeding port 5. The blocking block 7 plays a role of blocking the discharging port 8 and the feeding port 5, which is convenient for the pistons 1 and 2 A closed space is formed between 13; a discharge port 8 is provided on the top of the sampling tube 1 and near the right side of the feeding port 5; the polyester resin can be discharged out of the sampling tube 1 through the discharging port 8, and the middle of the sampling tube 1 is movably connected There are connecting rods 9 which act to drive the movement of pistons 1-12 and 2-13. The middle portion of the connecting rods 9 is provided with an "l" -shaped hole adapted to the flexible air pipe 10 and the right side of the connecting rods 9 It is fixedly connected to the moving mechanism. The right side of the flexible gas pipe 10 is connected to a booster pump and a vacuum pump through a three-way pipe. The middle part of the connecting rod 9 is fixedly connected to a flexible gas pipe 10 that extends through to the right side of the connecting rod 9 and the flexible gas pipe 10 To play the role of extracting air, the top of the connecting rod 9 and the top near the left side of the soft air pipe 10 is fixedly connected with a filter element 11 that prevents the polyester resin from entering the soft gas pipe 10.

The middle part of the connecting rod 9 is fixedly connected with the piston one 12, the piston one 12 and the piston two 13 are used to store and transport the polyester resin. The left side of the connecting rod 9 is fixedly connected with the piston two 13, the piston one 12 and the piston two 13 A heat conducting ring 14 is fixedly connected to the inner side of the ring. The heat conducting ring 14 plays a role of heat conduction. A heating wire 15 is fixedly connected to the middle of the pistons 1 and 2 and near the heat conducting ring 14. The heating wire 15 is heated and passes heat conduction. Ring 14 raises the temperature between piston one 12 and piston two 13 and keeps it within a certain range to ensure that the polyester resin can flow. The middle of piston one 12 and piston two 13 is close to the heating wire 15 A temperature control device 16 is fixedly connected to the inside. The temperature control device 16 controls the size of the temperature. When the temperature is higher than the set temperature, the heating wire 15 is automatically turned off and no longer heats. When the temperature is lower than the set temperature, The electric heating wire 15 is automatically energized to maintain a constant temperature between the pistons 1-12 and the pistons 2-13.

The temperature control device 16 includes a conductive block 161. The inside of the conductive block 161 is provided with contacts. The thermal expansion coefficient of the iron piece 162 is smaller than the thermal expansion coefficient of the copper piece 163. The inside of the iron piece 162 is fixedly connected to the conductive block 161. Contacts, an iron piece 162 is fixedly connected to the outside of the conductive block 161 through a conductive post, and a copper piece 163 is fixedly connected to the outside of the iron piece 162. The copper piece 163 and the iron piece 162 together form a bimetallic piece. At the temperature, the bimetallic piece will bend and bend in the direction of the copper piece 163, and the circuit will be disconnected. When the temperature drops, the original state will be restored, the circuit will be connected, and the heating wire 15 will continue to heat.

Working principle: Before sampling, move piston one 12 and piston two 13 to the leftmost end inside the sampling tube 1 through the connecting rod 9. At this time, piston one 12 will squeeze the block 7 into the feed port 5 and feed the material. Port 5 is blocked. At this time, a closed space is formed between piston one 12 and piston two 13 and the vacuum pump is turned on. The space between piston one 12 and piston two 13 is evacuated to a vacuum lower than the pressure of the reaction kettle through the flexible air pipe 10 After the space is completed, move the connecting rod 9 to the right to drive piston one 12 and piston two 13 to move to the right together. When the block 7 is no longer squeezed by piston one 12, then the reaction kettle is due to the pressure difference. The polyester resin inside will enter the sampling tube 1 through the feed port 5. The polyester resin is stored between the piston 1 12 and the piston 2 13. When the piston 2 13 moves to the right, the gas on the left side of the sampler 1 will be In order to maintain air pressure balance, the gas in the reactor is introduced into the sampler 1 through the pressure regulating hole 3 and the filter element 4 to maintain the air pressure balance. When the polyester resin needs to be discharged from the sampler 1, continue to pull the connecting rod to the right 9, the connecting rod 9 drives piston one 12 and piston two 13 to the right When the piston 2 13 squeezes the block 7 into the feed port 5, the discharge port 8 is blocked by the block 7. At this time, a closed space is formed again between the piston 1 12 and the piston 2 13. This time, the pressure is opened. The pump pressurizes through the space between the pistons 1-12 and the pistons 2-13 in the flexible air pipe 10. After the pressure is increased, the connecting rod 9 is moved to the right so that the block 7 of the discharge port 8 does not block the discharge port 8 At this time, due to the pressure difference between the inside and outside, the polyester resin is squeezed out of the sampling tube 1 through the discharge port 8 to complete the entire sampling process, and the amount of polyester resin extracted can be controlled by controlling the vacuum degree drawn by the vacuum pump.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. And variations, the scope of the invention is defined by the appended claims and their equivalents.

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