Protective device for chemical pipeline

Abstract

The invention discloses a protective device for a chemical pipeline, and relates to the technical field of pipelines. The device comprises two pipelines, a welding seam is arranged at the welding part of the two pipelines; two arc-shaped plates are arranged on the peripheral side surface of the pipeline; a detection groove is formed in the inner wall of the arc-shaped plate; an elastic diaphragm is hermetically fixed on the inner wall of the detection groove; inflation grooves are symmetrically formed in the inner wall of the detection groove; piston cylinders symmetrically penetrate through and are fixed to the inner walls of the arc-shaped plates; piston plates are slidably arranged on the inner walls of the piston cylinders; piston rods are fixed on the bottom surfaces of the piston plates; a U-shaped plate is connected between the bottom ends of the two piston rods; a detection hole is formed in the elastic diaphragm in a penetrating manner; and a detection tube is fixed on the elastic diaphragm. By pushing the U-shaped plate, the piston rod and the piston plate to slide, the internal volume of the inflation groove is changed, when the volume is reduced, the elastic diaphragm is extruded and expanded to be tightly attached to the pipeline, the weld joint of the pipeline is sealed and surrounded by a circle, then air is introduced into the pipeline, and if a leak exists at the weld joint, air can flow into a leak detector to be detected.

Description

Technical Field

[0001] The invention belongs to the technical field of pipelines, and in particular relates to a protective device for chemical pipelines. Background Art

[0002] The main material of chemical pipelines is ultra-high molecular weight polyethylene, which has excellent comprehensive performance. Its wear resistance, low temperature resistance, corrosion resistance, self-lubrication and impact resistance are the highest among all plastics. Its wear resistance is better than that of polytetrafluoroethylene, nylon, carbon steel and other materials. It can work for a long time under conditions of minus 269 degrees to plus 80 degrees. It is called "amazing plastic" and is an ideal pipe material.

[0003] In the chemical industry, chemical pipelines are often used to transport chemical raw materials. Usually, the ends of multiple sections of chemical pipelines are welded to form a long pipeline for long-distance transportation. However, after the chemical pipeline has been used for too long, holes may appear in its welding parts, causing the loss of chemical raw materials. Failure to repair or replace it in time will cause greater losses.

[0004] To this end, we provide a protective device for a chemical pipeline to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a protective device for a chemical pipeline. By pushing the U-shaped plate, the piston rod and the piston plate to slide, the volume inside the inflation groove is changed. When the volume becomes smaller, the elastic diaphragm is squeezed and expanded to fit tightly against the pipeline, sealing the pipeline weld with a circle, and then ventilating the inside of the pipeline. If there is a leak in the weld, the gas will flow into the leak detector and be detected, thereby solving the problem that after the existing chemical pipeline has been used for too long, the weld may have leaks, causing the loss of chemical raw materials, and failure to repair or replace it in time will cause greater losses.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention is a protective device for a chemical pipeline, comprising two welded pipelines; a weld is provided at the welding position of the two pipelines; two identical arc-shaped plates are provided on the peripheral side surfaces of the pipeline; a detection groove is provided on the inner wall of the arc-shaped plate; an elastic diaphragm is sealed and fixed between the inner walls of the detection groove; an inflation groove is symmetrically provided on the inner wall of the detection groove; a piston cylinder connected to the inside of the inflation groove is symmetrically penetrated and fixed on the inner wall of the arc-shaped plate; a piston plate is slidably provided on the inner wall of the piston cylinder; a piston rod is fixed on the bottom surface of the piston plate; a U-shaped plate is connected between the bottom ends of the two piston rods; a detection hole is penetrated and provided on the elastic diaphragm; a detection tube is fixed on the elastic diaphragm; the detection tube is connected to the detection hole.

[0008] The present invention is further configured as follows: two mounting plates are symmetrically fixed on the surface of the arc plate; the two mounting plates on one arc plate are respectively fitted with the two mounting plates on the other arc plate; and the two mounting plates are fixedly connected by fastening bolts.

[0009] The present invention is further configured as follows: the weld is located between two elastic diaphragms; a plurality of T-shaped clamping plates are symmetrically fixed to the inner wall of the arc plate; the T-shaped clamping plates are in contact with the peripheral side surfaces of the pipeline; the T-shaped clamping plates separate the pipeline from the arc plate; and the gap between the pipeline and the arc plate forms a ventilation groove.

[0010] The present invention is further configured as follows: an L-shaped connecting rod is fixed to the side of the T-shaped abutting plate; a fan is fixed to the end of the L-shaped connecting rod; a temperature sensor is fixed inside the arc plate; and a controller is fixed to the side of the mounting plate.

[0011] The present invention is further configured as follows: a guide tube is fixedly passed through the peripheral side of the arc plate; the guide tube is connected with the inside of the detection groove; the detection tube and the guide tube are slidably matched; and an arc-shaped sealing groove is opened at the end of the detection tube.

[0012] The present invention is further configured as follows: an arc-shaped sealing plate is provided on the inner wall of the arc-shaped sealing groove; the arc-shaped sealing groove and the arc-shaped sealing plate are sealingly plugged together; a ventilation pipe is fixed to the bottom surface of the arc-shaped sealing plate; and a leak detector is fixed to the end of the ventilation pipe.

[0013] The present invention is further configured as follows: baffles are symmetrically fixed on the surface of the U-shaped plate; electric telescopic rods are fixed on the peripheral side surfaces of the arc-shaped plate; and the telescopic ends of the electric telescopic rods are fixedly connected to the baffles.

[0014] The present invention is further configured as follows: the controller input end is electrically connected to the temperature sensor, and the controller output end is electrically connected to the fan and the electric telescopic rod, and is connected to the leak detector through communication.

[0015] The present invention has the following beneficial effects:

[0016] 1. The present invention pushes the U-shaped plate to slide, driving the piston rod and the piston plate to slide, thereby changing the volume inside the inflation groove. When the volume of the inflation groove becomes smaller, the elastic diaphragm is squeezed, so that the elastic diaphragm is expanded and pressed against the side surface of the pipeline. Then, the two elastic diaphragms seal the pipeline weld in a circle, and then ventilate the inside of the pipeline. If there is a leak in the weld, the gas will flow into the leak detector along the detection hole, the detection tube and the ventilation tube, and the leak detector can detect the outflow of gas.

[0017] 2. The present invention provides ventilation slots between the pipeline and the arc plate so that the temperature on the pipeline has a certain space to disperse. A temperature sensor is provided to detect the air temperature, and a fan is used to exchange heat and cool the air, thereby preventing long-term high temperature from being unable to disperse and damaging the pipeline, thereby affecting the service life of the pipeline, protecting the pipeline and extending the service life of the pipeline.

[0018] 3. The present invention is easy to install and disassemble, and can be fixed around the welds between pipelines for a long time. The welds of the pipelines can be inspected regularly, which is conducive to timely discovering pipeline leaks and avoiding unnecessary losses caused by a large amount of raw materials leaking out of the pipeline.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0021] Figure 1 The figure is a schematic diagram of the structure of a protective device for a chemical pipeline.

[0022] Figure 2 For the present invention Figure 1 A magnified image of area A.

[0023] Figure 3 For the present invention Figure 1 Another perspective structural diagram of .

[0024] Figure 4 For the present invention Figure 3 sectional view of .

[0025] Figure 5 For the present invention Figure 4 Another perspective structural diagram of .

[0026] Figure 6 It is a schematic structural diagram of the curved plate of the present invention.

[0027] Figure 7 It is a cross-sectional view of the curved plate of the present invention.

[0028] Figure 8 It is a schematic diagram of the structure of the pipeline of the present invention.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1-pipeline, 2-weld, 3-arc plate, 4-detection groove, 5-elastic diaphragm, 6-inflating groove, 7-piston cylinder, 8-piston plate, 9-piston rod, 10-U-shaped plate, 11-detection hole, 12-detection tube, 13-mounting plate, 14-T-shaped abutment plate, 15-ventilation groove, 16-L-shaped connecting rod, 17-blower, 18-controller, 19-guide tube, 20-arc sealing groove, 21-arc sealing plate, 22-ventilation pipe, 23-leak detector, 24-baffle, 25-electric telescopic rod. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] For specific embodiment 1, please refer to Figure 1-8 The present invention is a protective device for a chemical pipeline, comprising two welded pipelines 1; a weld 2 is provided at the welding place of the two pipelines 1; two identical arc-shaped plates 3 are provided on the side surface of the pipeline 1; a detection groove 4 is opened on the inner wall of the arc-shaped plate 3; an elastic diaphragm 5 is sealed and fixed between the inner walls of the detection groove 4; an inflation groove 6 is symmetrically opened on the inner wall of the detection groove 4; a piston cylinder 7 connected to the inside of the inflation groove 6 is symmetrically fixed through the inner wall of the arc-shaped plate 3; a piston plate 8 is slidably provided on the inner wall of the piston cylinder 7; a piston rod 9 is fixed to the bottom surface of the piston plate 8; a U-shaped plate 10 is connected between the bottom ends of the two piston rods 9; a detection hole 11 is opened through the elastic diaphragm 5; a detection tube 12 is fixed on the elastic diaphragm 5; the detection tube 12 is connected to the detection hole 11.

[0033] The working principle of this embodiment is: after the welding of the pipeline 1 is completed, the device is fixed around the weld 2 of the pipeline 1 so that the condition of the weld 2 can be checked at any time.

[0034] In the initial state, when it is necessary to check whether there is a leak at the weld 2 of the pipeline 1, first push the U-shaped plate 10 to slide in the direction close to the arc plate 3, thereby driving the two piston rods 9 to slide, and then driving the corresponding piston plate 8 to slide along the corresponding piston cylinder 7, so that the piston plate 8 slides in the direction close to the inflation groove 6, and then the internal volume of the inflation groove 6 becomes smaller but the air volume remains unchanged, and then the air is pushed into the detection groove 4, squeezing the elastic diaphragm 5 on the detection groove 4, so that the elastic diaphragm 5 is expanded and pressed against the side of the pipeline 1, and then the two elastic diaphragms 5 surround the weld 2 of the pipeline 1 in a circle, and then ventilate the inside of the pipeline 1. If there is a hole in the weld 2, the gas will flow from the hole to the detection hole 11 and out along the detection tube 12. Gas outflow can be detected at the end of the detection tube 12. If there is no hole in the weld 2, no gas outflow can be detected at the end of the detection tube 12. After the detection, the U-shaped plate 10 is pushed to slide back, thereby driving the two piston rods 9 to slide, and then driving the corresponding piston plate 8 to slide along the corresponding piston cylinder 7, so that the piston plate 8 slides back, and then the internal volume of the inflation groove 6 becomes larger but the amount of air remains unchanged, and then the elastic diaphragm 5 on the detection groove 4 is sucked back, so that the elastic diaphragm 5 returns to the initial state.

[0035] In this embodiment, by pushing the U-shaped plate 10 to slide, the piston rod 9 and the piston plate 8 are driven to slide, thereby changing the volume inside the inflation groove 6. When the volume of the inflation groove 6 becomes smaller, the elastic diaphragm 5 is squeezed so that the elastic diaphragm 5 is stretched and pressed against the side of the pipe 1. Then, the two elastic diaphragms 5 seal the weld 2 of the pipe 1 in a circle, and then the inside of the pipe 1 is ventilated. If there is a hole in the weld 2, the gas will flow from the hole to the detection hole 11 and flow out along the detection tube 12. Gas outflow can be detected at the end of the detection tube 12. When the sliding piston plate 8 increases the volume of the inflation groove 6, the elastic diaphragm 5 is reset to its initial state.

[0036] For specific embodiment 2, please refer to Figure 1-8 On the basis of the specific embodiment 1, two mounting plates 13 are symmetrically fixed on the surface of the arc plate 3; the two mounting plates 13 on one arc plate 3 are respectively fitted with the two mounting plates 13 on the other arc plate 3; the two mounting plates 13 are fixedly connected by fastening bolts.

[0037] Specifically, the weld 2 is located between the two elastic diaphragms 5; a plurality of T-shaped clamping plates 14 are symmetrically fixed to the inner wall of the arc plate 3; the T-shaped clamping plates 14 fit the side surfaces of the pipe 1; the T-shaped clamping plates 14 separate the pipe 1 from the arc plate 3; and the gap between the pipe 1 and the arc plate 3 forms a ventilation groove 15.

[0038] Furthermore, an L-shaped connecting rod 16 is fixed to the side of the T-shaped abutting plate 14 ; a fan 17 is fixed to the end of the L-shaped connecting rod 16 ; a temperature sensor is fixed inside the arc plate 3 ; and a controller 18 is fixed to the side of the mounting plate 13 .

[0039] The working principle of this embodiment is as follows: after the welding of the two pipes 1 is completed, the two arc plates 3 are merged together so that the T-shaped clamping plate 14 is pressed against the side of the pipe 1, and the corresponding mounting plates 13 are pressed together, and then the mounting plates 13 are fixed together by tightening bolts. The temperature sensor monitors the temperature of the air on the side of the pipe 1 in real time. When the temperature does not exceed the preset value, the ventilation and cooling are carried out through the ventilation slots 15. When the temperature is too high and exceeds the preset value, the temperature sensor sends a signal to the controller 18. The controller 18 receives the signal and turns on the fan 17, drives the fan 17 to work and rotate, and extracts the high-temperature gas for cooling, so as to prevent the pipe 1 from being damaged by excessive temperature, thereby affecting the service life of the pipe 1.

[0040] In this embodiment, a ventilation groove 15 is provided between the pipe 1 and the arc plate 3 so that the temperature on the pipe 1 has a certain space to disperse. A temperature sensor is provided to detect the air temperature, and the air is cooled by heat exchange with the fan 17 to prevent the pipe 1 from being damaged by long-term high temperature that cannot be dispersed, thereby affecting the service life of the pipe 1.

[0041] For specific embodiment 3, please refer to Figure 1-8 On the basis of the specific embodiment 1 and the specific embodiment 2, a guide tube 19 is fixedly passed through the side surface of the arc plate 3; the guide tube 19 is connected with the inside of the detection groove 4; the detection tube 12 is slidably matched with the guide tube 19; and an arc-shaped sealing groove 20 is opened at the end of the detection tube 12.

[0042] Specifically, an arcuate sealing plate 21 is disposed on the inner wall of the arcuate sealing groove 20 ; the arcuate sealing groove 20 and the arcuate sealing plate 21 are sealed and plugged together; a vent pipe 22 is fixed to the bottom surface of the arcuate sealing plate 21 ; and a leak detector 23 is fixed to the end of the vent pipe 22 .

[0043] Furthermore, baffles 24 are symmetrically fixed on the surface of the U-shaped plate 10 ; electric telescopic rods 25 are fixed to the sides of the arc-shaped plate 3 ; and the telescopic ends of the electric telescopic rods 25 are fixedly connected to the baffles 24 .

[0044] Furthermore, the input end of the controller 18 is electrically connected to the temperature sensor, and the output end thereof is electrically connected to the fan 17 and the electric telescopic rod 25 and is connected to the leak detector 23 via communication.

[0045] The working principle of this embodiment is as follows: after the welding of the two pipes 1 is completed, the two arc plates 3 are merged together so that the T-shaped clamping plate 14 is pressed against the side surface of the pipe 1, and the corresponding mounting plates 13 are pressed together, and then the mounting plates 13 are fixed together by fastening bolts, and then the arc sealing plate 21 on the ventilation pipe 22 is inserted into the arc sealing groove 20 at the end of the detection pipe 12, and then the connection end of the detection pipe 12 and the ventilation pipe 22 is sealed by waterproof tape to prevent gas from flowing out and destroying the sealing of the device.

[0046] The controller 18 will regularly inspect the pipeline 1, and by controlling the extension end of the electric telescopic rod 25 to extend, the baffle 24 is driven to move, and then the U-shaped plate 10 is driven to move, so that the U-shaped plate 10 slides in the direction close to the arc plate 3, and then the two piston rods 9 are driven to slide, and then the corresponding piston plate 8 is driven to slide along the corresponding piston cylinder 7, so that the piston plate 8 slides in the direction close to the inflation groove 6, and then the internal volume of the inflation groove 6 becomes smaller but the air volume remains unchanged, and then the air enters the detection groove 4, squeezing the elastic diaphragm 5 on the detection groove 4, so that the elastic diaphragm 5 is stretched and pressed against the side of the pipeline 1, and then the two elastic diaphragms 5 surround the weld 2 of the pipeline 1 in a circle, and then go to the inside of the pipeline 1 Ventilation, if there is a hole in the weld 2, the gas will flow from the hole to the detection hole 11, and flow into the ventilation pipe 22 along the detection tube 12, and the leak detector 23 can detect the gas outflow. If there is no hole in the weld 2, the leak detector 23 cannot detect the gas outflow. After the detection, the controller 18 drives the telescopic end of the electric telescopic rod 25 to retract, thereby pushing the U-shaped plate 10 to slide back, thereby driving the two piston rods 9 to slide, and then driving the corresponding piston plate 8 to slide along the corresponding piston cylinder 7, so that the piston plate 8 slides back, and then the internal volume of the inflation groove 6 becomes larger but the air volume remains unchanged, and then the elastic diaphragm 5 on the detection groove 4 is sucked back, so that the elastic diaphragm 5 returns to the initial state.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A protective device for a chemical pipeline, comprising two welded pipelines (1); a weld (2) is provided at the weld of the two pipelines (1); and is characterized in that: Two identical arc-shaped plates (3) are provided on the peripheral side of the pipe (1); a detection groove (4) is provided on the inner wall of the arc-shaped plate (3); an elastic diaphragm (5) is sealed and fixed between the inner walls of the detection groove (4); The inner wall of the detection groove (4) is symmetrically provided with an air filling groove (6); the inner wall of the arc-shaped plate (3) is symmetrically penetrated and fixed with a piston cylinder (7) which is in communication with the interior of the air filling groove (6); A piston plate (8) is slidably provided on the inner wall of the piston cylinder (7); a piston rod (9) is fixed to the bottom surface of the piston plate (8); a U-shaped plate (10) is connected between the bottom ends of the two piston rods (9); A detection hole (11) is formed through the elastic diaphragm (5); a detection tube (12) is fixed to the elastic diaphragm (5); and the detection tube (12) is in communication with the detection hole (11).

2. A chemical pipeline protection device according to claim 1, characterized in that: Two mounting plates (13) are symmetrically fixed on the surface of the arc-shaped plate (3); the two mounting plates (13) on one arc-shaped plate (3) are respectively fitted with the two mounting plates (13) on the other arc-shaped plate (3); and the two mounting plates (13) are fixedly connected by fastening bolts.

3. A protective device for a chemical pipeline according to claim 2, characterized in that: The weld (2) is located between the two elastic diaphragms (5); a plurality of T-shaped abutting plates (14) are symmetrically fixed to the inner wall of the arc-shaped plate (3); the T-shaped abutting plates (14) are in contact with the peripheral side surfaces of the pipe (1); the T-shaped abutting plates (14) separate the pipe (1) from the arc-shaped plate (3); and the gap between the pipe (1) and the arc-shaped plate (3) forms a ventilation slot (15).

4. A chemical pipeline protection device according to claim 3, characterized in that: An L-shaped connecting rod (16) is fixed to the side of the T-shaped abutting plate (14); a fan (17) is fixed to the end of the L-shaped connecting rod (16); a temperature sensor is fixed inside the arc-shaped plate (3); and a controller (18) is fixed to the side of the mounting plate (13).

5. A chemical pipeline protection device according to claim 4, characterized in that: A guide tube (19) is fixedly passed through the peripheral side of the arc plate (3); the guide tube (19) is connected to the interior of the detection groove (4); the detection tube (12) and the guide tube (19) are slidably matched; and an arc-shaped sealing groove (20) is provided at the end of the detection tube (12).

6. A chemical pipeline protection device according to claim 5, characterized in that: The inner wall of the arc-shaped sealing groove (20) is provided with an arc-shaped sealing plate (21); the arc-shaped sealing groove (20) and the arc-shaped sealing plate (21) are sealed and plugged together; a vent pipe (22) is fixed to the bottom surface of the arc-shaped sealing plate (21); and a leak detector (23) is fixed to the end of the vent pipe (22).

7. A chemical pipeline protection device according to claim 1, characterized in that: A baffle (24) is symmetrically fixed on the surface of the U-shaped plate (10); an electric telescopic rod (25) is fixed on the peripheral side of the arc-shaped plate (3); and the telescopic end of the electric telescopic rod (25) is fixedly connected to the baffle (24).

8. A chemical pipeline protection device according to claim 7, characterized in that: The input end of the controller (18) is electrically connected to the temperature sensor, and the output end is electrically connected to the fan (17) and the electric telescopic rod (25), and is connected to the leak detector (23) through communication.

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