Dredging device for pressure guide pipe of reaction kettle of polyester device

Abstract

The invention relates to a polyester device reaction kettle pressure guide pipe dredging device, and belongs to the technical field of polyester device reaction kettles.The polyester device reaction kettle pressure guide pipe dredging device comprises a barrel, a poking needle and a gland, the poking needle is in threaded connection with the barrel, filler is arranged in the barrel, the gland is detachably connected with the barrel, and the barrel and the gland are in threaded connection. The stabbing needle is in threaded connection with the barrel body and / or the gland, the gland comprises a connecting part and an extending part, the connecting part is used for being connected with the barrel body, and the extending part is used for extending into the barrel body to compact filler. The dredging device has the advantage that the probability that the pressure of the reaction kettle is greatly changed in the dredging process can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of polyester plant reactors, and in particular to a pressure-inducing pipe dredging device for polyester plant reactors. Background Art

[0002] During polyester production, the reactor's pressure-intake pipes are prone to clogging due to esterification deposits, molten material, or residual polymer crystals. This can cause pressure distortion, impacting liquid level control and reaction stability. Because the process requires the reactor to maintain a constant positive or negative pressure, leaks and air aspiration during online unclogging can lead to sudden pressure drops or vacuum breaks in the reactor, impacting production. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, one of the purposes of this application is to provide a polyester device reactor pressure pipe dredging device, which has the advantage of reducing the probability of a large change in the reactor pressure during the dredging process.

[0004] The above-mentioned purpose of this application is achieved through the following technical solutions:

[0005] A device for clearing the pressure-inducing pipe of a polyester reactor reactor comprises a cylinder, a piercing needle and a gland, wherein the piercing needle is threadedly connected to the cylinder, a filler is arranged in the cylinder, the gland and the cylinder are detachably connected, the piercing needle is threadedly connected to the cylinder and / or the gland, and the gland comprises a connecting portion and an inserting portion, wherein the connecting portion is used to connect to the cylinder, and the inserting portion is used to insert into the cylinder to compact the filler.

[0006] By adopting the above technical solution, when in use, through the setting of the packing and the threaded connection between the piercing needle and the cylinder and / or the pressure cover, a better sealing effect can be achieved, thereby reducing the probability of a large change in the reactor pressure during the dredging process.

[0007] In a preferred example, the present application can be further configured as follows: a driving portion is provided at one end of the puncture needle, and the length direction of the driving portion is perpendicular to the length direction of the puncture needle.

[0008] By adopting the above technical solution, the existence of the driving part makes it easier to move the puncture needle.

[0009] In a preferred example, the present application can be further configured as follows: an air path groove and an air path hole are also provided on the piercing needle, the air path groove is arranged on the surface of the piercing needle, and the air path hole and the piercing needle are arranged concentrically for connection with a barometer.

[0010] By adopting the above technical solution, the presence of the gas path groove and the gas path hole makes it possible to detect the pressure in the reactor, thereby facilitating timely detection of whether there is a significant change in pressure during the dredging process.

[0011] In a preferred example, the present application can be further configured as follows: the piercing needle includes a breakthrough section and an insertion section, the breakthrough section is located at an end away from the driving part, and an air path groove exists in at least a portion of the insertion section.

[0012] By adopting the above technical solution, that is, during use, the breakthrough section is used to squeeze and crush the residue, so the air path groove exists on the entry section, which can greatly reduce the probability of residue blocking the air path groove, and when the air path groove is blocked, it is also easy to clean.

[0013] In a preferred example, the present application can be further configured as follows: the filler includes an entry section, the entry section is made of a flexible material, an expansion cavity is also provided on the entry section, and an air guide hole is provided on the filler, which is used to connect the expansion cavity and the air path groove.

[0014] By adopting the above technical solution, that is, during use, the expansion chamber is expanded by gas, thereby making the inlet section and the inner wall of the pressure-guiding pipe valve fit better, thereby achieving a better sealing effect.

[0015] In a preferred example, the present application can be further configured as follows: closing the pressure-inducing pipe valve, connecting the cylinder and the pressure-inducing pipe valve, applying force to the pressure cover so that the insertion portion moves toward the cylinder, and applying pressure to the packing so that the entry section enters the valve, then opening the pressure-inducing pipe valve, and driving the piercing needle through the driving portion to move and insert it into the pressure-inducing pipe for unblocking. After unblocking, the piercing needle is removed from the pressure-inducing pipe, and the pressure-inducing pipe valve is closed.

[0016] By adopting the above technical solution, the filler enters the pressure-guiding pipe valve, so that a good sealing effect can be achieved. At the same time, the needle is used to dredge the residue, thereby ensuring a good pressure-guiding effect after dredging.

[0017] In a preferred example, the present application can be further configured to: detect the sealing between the packing and the pressure-inducing pipe valve. If it is qualified, the driving unit drives the piercing needle to move so that the breakthrough section moves into the pressure-inducing pipe valve, and then opens the pressure-inducing pipe valve.

[0018] By adopting the above technical solution, that is, by detecting the sealing performance between the packing and the pressure-inducing pipe valve during use, the probability of pressure change can be reduced.

[0019] In a preferred example, the present application can be further configured as follows: air is ventilated to the air path groove through the air path hole, and the gas enters the air guide hole and the expansion cavity through the air path groove, causing the entry section to expand.

[0020] By adopting the above technical solution, that is, when the puncture needle has not entered the valve, the expansion cavity is expanded through the air path hole, the air path groove and the air guide hole. After the dredging is completed, the gas in the expansion cavity is discharged through the air guide hole, the air path groove and the air path hole, thereby facilitating the removal of the filler from the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the cross-sectional structure of this application.

[0022] Figure numerals: 1. Cylinder; 2. Poke needle; 21. Air path groove; 22. Air path hole; 3. Driving part; 4. Filler; 41. Entry section; 411. Expansion chamber; 412. Air guide hole; 42. Connecting section; 43. Sealing section; 5. Pressure cover; 51. Connecting part; 52. Inserting part. DETAILED DESCRIPTION

[0023] The present application is further described in detail below with reference to the accompanying drawings.

[0024] Reference Figure 1 , is a polyester device reactor pressure pipe clearing device disclosed in the present application, including a cylinder 1, a needle 2 and a pressure cover 5, the needle 2 and the cylinder 1 are threadedly connected, a filler 4 is provided in the cylinder 1, the pressure cover 5 and the cylinder 1 are detachably connected, the needle 2 and the cylinder 1 and / or the pressure cover 5 are threadedly connected, the pressure cover 5 includes a connecting portion 51 and an extending portion 52, the connecting portion 51 is used to connect to the cylinder 1, and the extending portion 52 is used to extend into the cylinder 1 to compact the filler 4.

[0025] In this embodiment, the needle 2 is threadedly connected to the gland 5. A driving portion 3 is provided at one end of the needle 2. The driving portion 3 is rod-shaped, with the length of the driving portion 3 perpendicular to the length of the needle 2. The needle 2 is also provided with an air path groove 21 and an air path hole 22. The air path groove 21 is annularly arranged on the surface of the needle 2. The air path hole 22 is concentrically arranged with the needle 2, with one end connected to the air path groove 21 and the other end connected to the outside world for connection to the barometer. The needle 2 includes a breakthrough section and an insertion section. The breakthrough section is the end away from the driving portion 3, and at least a portion of the insertion section has the air path groove 21.

[0026] The filler 4 includes an entry section 41, which is made of a flexible material (such as rubber or silicone), and the diameter of the entry section 41 is not less than the inner diameter of the valve installed on the pressure-conducting pipe (hereinafter referred to as the pressure-conducting pipe valve). An expansion chamber 411 is also provided on the entry section 41, and an air guide hole 412 is provided on the filler 4. The air guide hole 412 connects the air path groove 21 to the expansion chamber 411. The non-entry section 41 portion of the filler 4 can be made of a rigid material (such as plastic) or a flexible material. A through hole is provided on the filler 4 for the puncture needle 2 to pass through. In this embodiment, the filler 4 includes an entry section 41, a connecting section 42 and a sealing section 43, wherein the entry section 41 and the sealing section 43 are both made of a flexible material, the connecting section 42 is made of a rigid material, the air guide hole 412 is provided on the connecting section 42, and the aperture of the through hole on the sealing section 43 and the entry section 41 is smaller than the diameter of the puncture needle 2. The connecting section 42 and the puncture needle 2 are threadedly connected

[0027] When dredging, the following steps are included: a preparation step, closing the pressure pipe valve, and connecting the cylinder 1 and the pressure pipe valve;

[0028] In the pre-sealing step, force is applied to the gland 5 so that the protruding portion 52 moves toward the inside of the cylinder 1, and pressure is applied to the packing 4 so that the entry section 41 enters the valve;

[0029] Secondary sealing step: Check the sealing between the packing 4 and the pressure-inducing pipe valve. If qualified, air is ventilated to the air path groove 21 through the air path hole 22. The gas enters the air guide hole 412 and the expansion chamber 411 through the air path groove 21, causing the inlet section 41 to expand.

[0030] In the pre-clearing step, the driving unit 3 drives the needle 2 to move, and moves the breakthrough section into the valve of the pressure-guiding tube. At this time, the air path groove 21 is not connected to the air guide hole 412, and the pressure gauge is connected to the air path hole 22;

[0031] The unblocking step is to open the valve of the pressure-inducing pipe, and drive the puncture needle 2 through the driving part 3 to move and extend it into the pressure-inducing pipe to unblock it;

[0032] After the dredging is completed, the needle 2 is removed from the pressure-inducing tube and the pressure-inducing tube valve is closed.

[0033] The implementation principle of this embodiment is: during use, the arrangement of the piercing needle 2 and the filler 4 can achieve good sealing and dredging effects, and can reduce the probability of large pressure changes during the dredging process.

[0034] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A device for dredging the pressure-inducing pipe of a polyester reactor, characterized by: The invention comprises a cylinder (1), a pricking needle (2) and a pressure cover (5), wherein the pricking needle (2) and the cylinder (1) are threadedly connected, a filler (4) is provided in the cylinder (1), the pressure cover (5) and the cylinder (1) are detachably connected, the pricking needle (2) and the cylinder (1) and / or the pressure cover (5) are threadedly connected, and the pressure cover (5) comprises a connecting portion (51) and an inserting portion (52), wherein the connecting portion (51) is used to be connected to the cylinder (1), and the inserting portion (52) is used to insert into the cylinder (1) to compact the filler (4).

2. The device for dredging the pressure-inducing pipe of a polyester reactor according to claim 1, characterized in that: One end of the puncture needle (2) is provided with a driving portion (3), and the length direction of the driving portion (3) is perpendicular to the length direction of the puncture needle (2).

3. The device for dredging the pressure-inducing pipe of a polyester reactor according to claim 1, characterized in that: The puncture needle (2) is further provided with an air path groove (21) and an air path hole (22). The air path groove (21) is provided on the surface of the puncture needle (2). The air path hole (22) and the puncture needle (2) are concentrically provided for connection with a barometer.

4. The device for dredging the pressure-inducing pipe of a polyester reactor according to claim 3, characterized in that: The puncture needle (2) comprises a breakthrough section and an insertion section, wherein the breakthrough section is located at an end away from the driving portion (3), and an air path groove (21) exists in at least a portion of the insertion section (41).

5. The device for dredging the pressure-inducing pipe of a polyester reactor according to claim 4, characterized in that: The filler (4) includes an entry section (41), the entry section (41) is made of a flexible material, an expansion chamber (411) is further provided on the entry section (41), and an air guide hole (412) is provided on the filler (4), and the air guide hole (412) is used to connect the expansion chamber (411) and the air path groove (21).

6. The device for dredging the pressure-inducing pipe of a polyester reactor according to claim 5, characterized in that: The pressure-inducing pipe valve is closed, the cylinder (1) and the pressure-inducing pipe valve are connected, force is applied to the gland (5), so that the insertion portion (52) moves toward the cylinder (1), and pressure is applied to the filler (4), so that the entry section (41) enters the valve, and then the pressure-inducing pipe valve is opened, and the driving portion (3) drives the piercing needle (2) to move and extend into the pressure-inducing pipe to clear the blockage. After clearing is completed, the piercing needle (2) is removed from the pressure-inducing pipe and the pressure-inducing pipe valve is closed.

7. The device for dredging the pressure-inducing pipe of a polyester reactor according to claim 6, characterized in that: The sealing between the packing (4) and the pressure-inducing pipe valve is detected. If the sealing is qualified, the driving part (3) drives the piercing needle (2) to move so that the breakthrough section moves into the pressure-inducing pipe valve, and then the pressure-inducing pipe valve is opened.

8. The device for dredging the pressure-inducing pipe of a polyester reactor according to claim 7, characterized in that: Air is ventilated to the air path groove (21) through the air path hole (22), and the gas enters the air guide hole (412) and the expansion chamber (411) via the air path groove (21), causing the entry section (41) to expand.

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