Tool for dredging pressure guide pipe of negative pressure reaction kettle

Abstract

The utility model belongs to the technical field of pipeline dredging tools, and relates to a tool for dredging a pressure guide pipe of a negative pressure reaction kettle, which comprises a steel chisel, and a sealing device a, a connecting pipe a, a sealing liquid tank and an interface which are hermetically connected in sequence from top to bottom, the steel chisel is sequentially divided into a tail section, a middle section and a head section from top to bottom; the sealing device a, the connecting pipe a, the sealing liquid tank and the connector are all arranged on the middle section in a sleeving mode. The sealing device a, the connecting pipe a and the middle section are matched with one another to form a sealing structure a for sealing the pressure guide pipe; the interface is in sealed connection with a pressure guide pipe; and the head section of the steel chisel is inserted into the pressure guide pipe. According to the utility model, blockages in the pressure guide pipe of the negative pressure reaction kettle can be effectively dredged, and the sealing state of the negative pressure reaction kettle in the dredging process is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline dredging tools and relates to a tool for dredging a pressure-inducing pipe of a negative pressure reactor. Background Art

[0002] In the field of polyester production, pressure control is a key parameter to ensure the smooth progress of the polycondensation reaction and achieve the required degree of polymerization of the product. To achieve this goal, the polycondensation reactor is usually set to a negative pressure state and maintain a certain vacuum degree to effectively promote the removal of small molecules. However, as the production process continues, impurities will gradually accumulate in the pressure pipe connecting the polycondensation reactor and the pressure gauge, resulting in abnormal values ​​or blockage, thereby affecting the accurate monitoring of the vacuum degree in the reactor.

[0003] To solve the problem of impurities in the impulse pipe, the common methods include briefly opening the valve and using a steel chisel to clear it, and flushing it with hot ethylene glycol. Although these two methods can remove some impurities to a certain extent, they both have significant limitations in their application.

[0004] First, when using the steel chisel dredging method, since the polycondensation reactor is maintained in a negative pressure state, forcibly opening the valve for dredging will cause external air to enter the reactor through the gap, which will cause fluctuations in the vacuum degree in the reactor.

[0005] Secondly, when using hot ethylene glycol for flushing, such as the online flushing device for recycling hot ethylene glycol in the polycondensation vacuum vapor phase line disclosed in patent application CN203330066U, the discharge valve before the hot ethylene glycol regulating valve, the discharge valve before the polycondensation II vacuum regulating valve, and the inlet ball valve of the polycondensation II vacuum regulating power steam are connected in sequence through stainless steel pipes to form an online flushing pipeline for the polycondensation II vacuum vapor phase line; the discharge valve before the hot ethylene glycol regulating valve, the discharge valve before the final polycondensation vacuum regulating valve, and the inlet ball valve of the final polycondensation vacuum regulating power steam are connected in sequence through stainless steel pipes to form an online flushing pipeline for the polycondensation vacuum vapor phase line. Although this cleaning method can effectively remove impurities, during the flushing process, the vaporization of hot ethylene glycol will cause large fluctuations in system pressure and temperature, and may even cause vacuum loss. This will not only affect the stability of production, but in severe cases, it may also cause production interruption and economic losses.

[0006] Therefore, in order to ensure the sealing state of the negative pressure reactor during the unclogging process, it is necessary to develop a new unclogging tool suitable for the negative pressure reactor. Utility Model Content

[0007] The utility model aims to solve the problems existing in the prior art and provides a tool for unblocking the pressure-inducing pipe of a negative pressure reactor.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0009] A tool for unblocking a negative pressure reactor pressure-inducing pipe, comprising a steel chisel, a sealing device a, a connecting pipe a, a sealing liquid tank and an interface;

[0010] The lower end sealing sleeve of the sealing device a is on the upper end of the connecting pipe a, the lower end of the connecting pipe a is sealed and connected with the upper end of the sealing liquid tank, and the lower end of the sealing liquid tank is sealed and connected with the interface;

[0011] The steel drill is divided into the tail section, the middle section and the head section from top to bottom;

[0012] The sealing device a, the connecting pipe a, the sealing liquid tank and the interface are all sleeved on the middle section;

[0013] The sealing device a, the connecting pipe a and the middle section cooperate with each other to form a sealing structure a for sealing the pressure-inducing pipe;

[0014] The interface is used for sealing connection with the pressure pipe valve at the end of the pressure pipe;

[0015] The head section of the steel drill is used to insert into the pressure-inducing pipe.

[0016] As the preferred technical solution:

[0017] In the tool for unblocking the pressure-inducing pipe of a negative pressure reactor as described above, the sealing structure a is a packing sealing structure.

[0018] As described above, in the tool for unblocking the pressure-inducing pipe of a negative pressure reactor, the sealing device a comprises a packing gland, a sealing packing and a fastening bolt.

[0019] The tool for unblocking the pressure-inducing pipe of a negative pressure reactor as described above, wherein the sealing device a further comprises a flange;

[0020] The flange is located between the packing gland and the sealing packing;

[0021] The flange and the packing gland are connected by tightening bolts.

[0022] A tool for unblocking the pressure-inducing pipe of a negative pressure reactor as described above, wherein a sealing device b and a connecting pipe b are provided between the sealing liquid tank and the interface;

[0023] The upper end of the sealing device b is sealed and connected to the lower end of the sealing liquid tank, the lower end of the sealing device b is sealed and sleeved on the upper end of the connecting pipe b, and the lower end of the connecting pipe b is sealed and connected to the interface;

[0024] The sealing device b and the connecting pipe b are both sleeved on the middle section;

[0025] The sealing device b, the connecting pipe b and the middle section cooperate with each other to form a sealing structure b for sealing the pressure-guiding pipe.

[0026] In the tool for unblocking the pressure-inducing pipe of a negative pressure reactor as described above, the sealing structure b is a packing sealing structure.

[0027] The tool for unblocking the pressure-inducing pipe of a negative pressure reactor as described above further comprises an external transparent pipe;

[0028] The external transparent tube is located outside the sealing liquid tank, and one end of the external transparent tube is communicated with the upper part of the sealing liquid tank, and the other end of the external transparent tube is communicated with the lower part of the sealing liquid tank.

[0029] A tool for unblocking the pressure-inducing pipe of a negative pressure reactor as described above, wherein the upper part of the sealing liquid tank is connected to a sealing liquid replenishing pipe, and a sealing valve a is installed on the sealing liquid replenishing pipe;

[0030] The lower part of the sealing liquid tank is connected with a sealing liquid discharge pipe, and a sealing valve b is installed on the sealing liquid discharge pipe.

[0031] As described above, in the tool for unblocking the pressure-inducing pipe of a negative pressure reactor, the steel chisel is a cylindrical rod, and a tip is arranged at the end of the head section of the steel chisel.

[0032] A tool for unblocking the pressure-inducing pipe of a negative pressure reactor as described above, wherein the tail section of the steel chisel is connected with a handle;

[0033] The handle and the steel chisel are fixedly connected to form a "T" shape structure.

[0034] Beneficial effects:

[0035] The utility model can clean the pressure-inducing pipe of the negative pressure reactor in a fully sealed and disturbance-free state by arranging two packing sealing structures, and avoids the situation that a small amount of air is sucked into the reactor due to the up-and-down movement or rotation of the steel drill during the dredging process, and the sealing liquid can be replenished at any time to ensure that the dredging process is fully sealed, thereby realizing a fully sealed dredging process in which the negative pressure reactor is completely isolated from the air;

[0036] The utility model adds a sealing device a on the upper part of the sealing liquid tank, so as to dredge the pressure-guiding pipes in different directions, and the sealing liquid will not be spilled during the dredging process, which is convenient and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a structural schematic diagram of a tool for unblocking a negative pressure reactor pressure pipe according to the utility model (the steel chisel is not shown in the figure);

[0038] Figure 2 It is a structural schematic diagram of a sealing device a of a tool for clearing the pressure-inducing pipe of a negative pressure reactor of the utility model;

[0039] Figure 3It is a schematic diagram of the connection relationship between the handle and the steel chisel of a tool for clearing the pressure-inducing pipe of a negative pressure reactor of the utility model;

[0040] Figure 4 It is a complete structural schematic diagram of a tool for unclogging the pressure-inducing pipe of a negative pressure reactor according to the utility model;

[0041] Figure 5 It is a schematic diagram of a tool for unclogging a pressure-inducing pipe of a negative pressure reactor of the utility model when unclogging the pressure-inducing pipe of a negative pressure reactor;

[0042] Among them, 1-sealing packing, 2-sealing device b, 3-fastening bolt, 5-sealing liquid feeding pipe, 6-sealing device a, 7-handle, 8-sealing liquid tank, 9-external transparent tube, 10-sealing liquid discharge pipe, 11-packing gland, 12-flange, 13-interface, 15-pressure pipe, 16-pressure pipe valve, 17-negative pressure reactor, 18-steel chisel, 19-connecting pipe a, 20-connecting pipe b. DETAILED DESCRIPTION

[0043] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0044] A tool for unblocking a pressure-inducing pipe of a negative pressure reactor, comprising an external transparent pipe and a steel chisel;

[0045] like Figure 3 As shown, the steel drill 18 is a cylindrical rod, which is divided into a tail section, a middle section and a head section from top to bottom; the tail section is connected to a handle 7, and the handle 7 is fixedly connected to the steel drill 18 to form a "T"-shaped structure, and a tip is provided at the end of the head section, and the head section is used to be inserted into the pressure-inducing pipe 15;

[0046] like Figure 4 As shown, the tool also includes a sealing device a6, a connecting pipe a19, a sealing liquid tank 8, a sealing device b2, a connecting pipe b20 and an interface 13 which are sequentially sleeved on the middle section from top to bottom;

[0047] like Figure 2 As shown, the sealing device a6 comprises a packing gland 11, fastening bolts 3, a flange 12 and a sealing packing 1; the flange 12 is located between the packing gland 11 and the sealing packing 1; the flange 12 is connected to the packing gland 11 by the fastening bolts 3;

[0048] like Figure 1As shown, the upper part of the sealing liquid tank 8 is connected to a sealing liquid replenishing pipe 5, and a sealing valve a is installed on the sealing liquid replenishing pipe 5; the lower part of the sealing liquid tank 8 is connected to a sealing liquid discharge pipe 10, and a sealing valve b is installed on the sealing liquid discharge pipe 10;

[0049] like Figure 4 As shown, the lower end sealing sleeve of the sealing device a6 is on the upper end of the connecting pipe a19, and the upper end of the sealing liquid tank 8 is sealed and connected to the lower end of the connecting pipe a19; the sealing device a6, the connecting pipe a19 and the middle section cooperate with each other to form a packing sealing structure for sealing the pressure-inducing pipe 15;

[0050] The structure of the sealing device b2 is the same as that of the sealing device a6;

[0051] like Figure 4 As shown, the upper end of the sealing device b2 is sealed and connected to the lower end of the sealing liquid tank 8, and the lower end of the sealing device b2 is sealed on the upper end of the connecting pipe b20; the sealing device b2, the connecting pipe b20 and the middle section cooperate with each other to form a packing sealing structure for sealing the pressure-inducing pipe 15;

[0052] like Figure 4 As shown, the lower end of the connecting pipe b 20 is sealed with the interface 13, and the interface 13 is used to be sealed with the pressure-inducing pipe valve 16 at the end of the pressure-inducing pipe 15;

[0053] like Figure 1 As shown, the external transparent tube 9 is located outside the sealing liquid tank 8, and one end is connected to the upper part of the sealing liquid tank 8, and the other end is connected to the lower part of the sealing liquid tank 8.

[0054] How to use this tool:

[0055] like Figure 5As shown, when the pressure-leading pipe 15 of the negative pressure reactor 17 is blocked by contaminants, first close the pressure-leading pipe valve 16 and remove the pressure gauge connected to the end interface of the pressure-leading pipe 15 of the negative pressure reactor, then seal and connect the interface 13 of the tool with the pressure-leading pipe valve 16 of the negative pressure reactor, and insert the head section of the steel chisel 18 into the interface 13. When unblocking, firstly, by twisting the fastening bolt 3 of the sealing device a 6 (and the locking bolt of the sealing device b 2), the packing gland 11 is driven to squeeze the sealing packing 1, so as to ensure that the sealing device a 6 and the sealing device b 2 have a good sealing effect on the pressure pipe 15; then, the sealing liquid (such as ethylene glycol) is injected into the sealing liquid tank 8 through the sealing liquid replenishing pipe 5, and at the same time, the liquid level of the sealing liquid in the sealing liquid tank 8 is observed through the external transparent tube 9, and the sealing liquid is replenished at any time through the sealing liquid replenishing pipe 5 when necessary; finally, the blocked pressure pipe valve 16 is opened, and the steel bar 18 is slowly inserted into the position blocked by the contaminants in the pressure pipe 15. During the insertion process, the steel bar 18 can be moved up and down and rotated as needed to achieve the best unblocking effect. After the unblocking is completed, the tool can be removed and the pressure gauge can be installed again.

[0056] During the entire unblocking process, due to the packing sealing structure of the sealing device a6 and the sealing device b2 and the sealing liquid in the sealing liquid tank 8, the negative pressure reactor can be isolated from the air, thereby avoiding possible safety hazards. In addition, due to the sealing device a2 and the connecting pipe a19 on the upper part of the sealing liquid tank 8, the unblocking tool can unblock the pressure-inducing pipe 15 in different directions without worrying about the spillage of the sealing liquid, further improving the safety and convenience of the operation.

Claims

1. A tool for unblocking a negative pressure reactor pressure pipe, comprising a steel chisel (18), characterized in that: It also includes a sealing device a (6), a connecting pipe a (19), a sealing liquid tank (8) and an interface (13); The lower end of the sealing device a (6) is sealed on the upper end of the connecting pipe a (19), the lower end of the connecting pipe a (19) is sealedly connected to the upper end of the sealing liquid tank (8), and the lower end of the sealing liquid tank (8) is sealedly connected to the interface (13); The steel drill (18) is divided into a tail section, a middle section and a head section from top to bottom; The sealing device a (6), the connecting pipe a (19), the sealing liquid tank (8) and the interface (13) are all sleeved on the middle section; The sealing device a (6), the connecting pipe a (19) and the middle section cooperate with each other to form a sealing structure a for sealing the pressure-guiding pipe (15); The interface (13) is used for sealing connection with the pressure-guiding pipe valve (16) at the end of the pressure-guiding pipe (15); The head section of the steel drill (18) is used for inserting into the pressure-inducing pipe (15).

2. A tool for unblocking the pressure-inducing pipe of a negative pressure reactor according to claim 1, characterized in that: The sealing structure a is a packing sealing structure.

3. A tool for unblocking the pressure-inducing pipe of a negative pressure reactor according to claim 2, characterized in that: The sealing device a (6) comprises a packing gland (11), a sealing packing (1) and a fastening bolt (3).

4. A tool for unblocking the pressure-inducing pipe of a negative pressure reactor according to claim 3, characterized in that: The sealing device a (6) further comprises a flange (12); The flange (12) is located between the packing gland (11) and the sealing packing (1); The flange (12) is connected to the packing gland (11) by means of fastening bolts (3).

5. The tool for unblocking the pressure-inducing pipe of a negative pressure reactor according to claim 1, characterized in that: A sealing device b (2) and a connecting pipe b (20) are provided between the sealing liquid tank (8) and the interface (13); The upper end of the sealing device b (2) is sealedly connected to the lower end of the sealing liquid tank (8), the lower end of the sealing device b (2) is sealedly sleeved on the upper end of the connecting pipe b (20), and the lower end of the connecting pipe b (20) is sealedly connected to the interface (13); The sealing device b (2) and the connecting pipe b (20) are both sleeved on the middle section; The sealing device b (2), the connecting pipe b (20) and the middle section cooperate with each other to form a sealing structure b for sealing the pressure-guiding pipe (15).

6. A tool for unblocking the pressure-inducing pipe of a negative pressure reactor according to claim 5, characterized in that: The sealing structure b is a packing sealing structure.

7. The tool for clearing the pressure-inducing pipe of a negative pressure reactor according to claim 1, characterized in that: Also includes an external transparent tube (9); The external transparent tube (9) is located outside the sealing liquid tank (8), and one end of the external transparent tube is connected to the upper part of the sealing liquid tank (8), and the other end of the external transparent tube is connected to the lower part of the sealing liquid tank (8).

8. The tool for clearing the pressure-inducing pipe of a negative pressure reactor according to claim 1, characterized in that: The upper part of the sealing liquid tank (8) is connected to a sealing liquid replenishing pipe (5), and a sealing valve a is installed on the sealing liquid replenishing pipe (5); The lower part of the sealing liquid tank (8) is connected to a sealing liquid discharge pipe (10), and a sealing valve b is installed on the sealing liquid discharge pipe (10).

9. The tool for unblocking the pressure-inducing pipe of a negative pressure reactor according to claim 1, characterized in that: The steel chisel (18) is a cylindrical rod, and a tip is arranged at the end of the head section of the steel chisel (18).

10. The tool for unblocking the pressure-inducing pipe of a negative pressure reactor according to claim 1, characterized in that: The tail section of the steel chisel (18) is connected with a handle (7); The handle (7) and the steel chisel (18) are fixedly connected to form a "T"-shaped structure.

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