Explosion-proof oil pipe

Abstract

The anti-explosion oil pipe comprises an oil pipe, one end of the oil pipe is connected with a first pipe connector, and the end, away from the first pipe connector, of the oil pipe is connected with a second pipe connector. And a sleeve sleeves the outer side of the oil pipe and pressurizes the oil pipe. The oil pipe is prone to collision, extrusion or friction in the working process, the sleeve is arranged on the outer side of the oil pipe, oil pipe abrasion can be reduced, the risk of oil pipe damage is reduced, the anti-pressure capacity of the oil pipe is improved, the oil pipe slope fracture risk is reduced, and the oil pipe anti-explosion capacity is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil pipes, and in particular relates to an explosion-proof oil pipe. Background Art

[0002] There are a large number of flammable and explosive gases and liquids in the petrochemical and coal chemical industries. The oil pipes used to transport various petroleum products, chemical raw materials or high-pressure gases are prone to rupture or leakage during long-term use. Once the oil pipes are ruptured or leaked, the petroleum products, chemical raw materials or liquefied petroleum gas in the oil pipes are prone to explosion due to leakage, causing casualties, property losses, and serious safety accidents. In order to prevent rupture, existing oil pipes usually adopt passive measures, such as: using rubber materials with high tolerance, using high-strength and high-toughness reinforcement layers, improving the structural strength and sealing structure of the oil pipe through structural design and optimization, and improving the explosion-proof performance of the oil pipe as much as possible through strict testing to avoid leakage.

[0003] Therefore, the above problems need to be solved urgently. Summary of the invention

[0004] Purpose of the invention: In order to overcome the above shortcomings, the present invention provides an explosion-proof oil pipe with high structural strength and active explosion-proof function. When the oil pipe is at risk of rupture, it actively reduces the pressure inside the oil pipe to avoid explosion, protect personal and property safety, and avoid safety accidents.

[0005] Technical solution: In order to achieve the above-mentioned purpose, the present invention provides an explosion-proof oil pipe, including an oil pipe, one end of the oil pipe is connected to a first pipe joint, and the end of the oil pipe away from the first pipe joint is connected to a second pipe joint. A casing is sleeved on the outside of the oil pipe, and the casing pressurizes the oil pipe. The oil pipe is easily subject to collision, extrusion or friction during operation. Arranging a casing on the outside of the oil pipe can reduce the wear of the oil pipe, reduce the risk of damage to the oil pipe, improve the pressure resistance of the oil pipe, reduce the risk of oil pipe slope rupture, and improve the explosion-proof ability of the oil pipe.

[0006] Furthermore, in the explosion-proof oil pipe, the outer wall of the casing is provided with reinforcing ribs, which are arranged in a grid shape. Providing reinforcing ribs on the outer wall of the casing can improve the pressure resistance of the oil pipe and prevent the oil pipe from rupturing due to excessive pressure, causing leakage.

[0007] Furthermore, in the above explosion-proof oil pipe, the oil pipe includes an inner layer, a reinforcement layer, and an outer protective layer. The inner layer, the reinforcement layer, and the outer protective layer are arranged in sequence from the inside to the outside. The reinforcement layer is set as a metal mesh. The inner layer adopts nitrile rubber that is oil-resistant and chemically resistant. The reinforcement layer is set as a metal mesh with high strength and strong corrosion resistance, which improves the pressure bearing capacity of the oil pipe. The outer protective layer is set as a fire-proof and wear-resistant rubber material to improve the fire-proof and wear-resistant performance of the oil pipe.

[0008] Furthermore, in the above-mentioned explosion-proof oil pipe, the reinforcement layer is grounded, the inner layer of the casing is printed with a conductive coating, and the conductive coating and the capacitive sensor are electrically connected. At this time, the conductive coating printed in the casing serves as a sensing electrode, the grounded reinforcement layer serves as a reference electrode, and the outer protective layer between the conductive coating and the reinforcement layer serves as an insulating layer. The capacitive sensor detects the capacitance change of the conductive coating.

[0009] According to the capacitance calculation formula: C= ; (The above is is the dielectric constant of the insulating medium, S is the relative effective area of ​​the two electrodes, and d is the distance between the two electrodes). When the distance between the conductive coating and the reinforcement layer changes, the capacitance detected by the capacitive sensor changes. In normal working conditions, the conductive coating and the reinforcement layer remain stable. When the oil pipe is damaged and cannot withstand normal working pressure, the oil pipe will bulge. When the oil pipe is about to bulge, the inner layer of the oil pipe will first expand slightly outward, resulting in a decrease in the distance between the conductive coating and the reinforcement layer. At the same time, the dielectric constant of the outer protective layer as the insulating layer changes, and the effective area changes due to local deformation. The capacitance detected by the capacitive sensor changes, and the capacitive sensor sends a signal to the control system. The control system immediately closes the control valve and cuts off the power supply. Before the oil pipe ruptures, the internal pressure of the oil pipe is reduced to prevent the oil pipe from rupturing, avoid the rupture that may occur after the oil pipe bulges, prevent further leakage and accidents, and make the oil pipe have active explosion-proof capabilities.

[0010] Furthermore, in the above explosion-proof oil pipe, a shielding tube is arranged outside the casing, and the inner side of the shielding tube abuts against the reinforcing rib to form a buffer cavity, and the shielding tube is set as conductive rubber. The conductive rubber has good conductivity and can effectively conduct static electricity to the ground to prevent static electricity accumulation from causing sparks, causing fire or explosion. When the oil pipe is deformed, the casing deforms outward into the buffer cavity, providing a buffer space for the deformation of the oil pipe, releasing the internal pressure of the oil pipe, slowing down the bulging speed of the oil pipe, providing time for the control system to react, and improving the explosion-proof capability of the oil pipe.

[0011] Furthermore, in the above-mentioned explosion-proof oil pipe, the first pipe joint includes a connecting head, the connecting head is integrally connected with a sealing head, the sealing head is set to be conical, a nut is connected to the outside of the sealing head, and a stopper is provided at one end of the nut close to the connecting head, and the stopper is provided at one side of the sealing head close to the connecting head. When the oil pipe needs to be connected, the oil outlet of the nut is threadedly connected, and the stopper seals the sealing head and the oil pipe. A sealing bushing is provided at one end of the sealing head close to the stopper, and during the connection process, the sealing bushing seals the stopper and the sealing head, thereby improving the sealing performance of the first pipe joint.

[0012] Furthermore, in the explosion-proof oil pipe, an annular inverted tooth is provided on the outer side of the connector, the connector is inserted into the oil pipe, a first clamp is provided on the outer side of the oil pipe, and the first clamp presses the oil pipe to the outer side of the connector. The first clamp and the annular inverted tooth design improve the firmness of the connection between the connector and the oil pipe, and prevent the connection and the oil pipe from being separated.

[0013] Furthermore, in the explosion-proof oil pipe, a tooth is provided inside the first clamp, and the tooth is provided on the inner wall of the first clamp. The first clamp squeezes the oil pipe, and the tooth penetrates the reinforcement layer, and the tooth is connected to the reinforcement layer. The tooth is provided inside the first clamp to improve the connection strength between the first pipe joint and the oil pipe. The tooth is connected to the reinforcement layer, and the first clamp is grounded to realize the grounding of the reinforcement layer, so that the reinforcement layer becomes a reference electrode.

[0014] Furthermore, in the explosion-proof oil pipe, a grounding ring is provided on the outer side of the first clamp, and the grounding ring is grounded. The grounding ring is provided to ensure the connection strength of the ground wire and prevent the ground wire from loosening.

[0015] Furthermore, in the above explosion-proof oil pipe, the second pipe joint is configured in the same manner as the first pipe joint, the second pipe joint is inserted into the oil pipe, a second clamp is provided on the outside of the oil pipe, and the second clamp presses the oil pipe to the outside of the second pipe joint.

[0016] It can be seen from the above technical scheme that the present invention has the following beneficial effects: the explosion-proof oil pipe of the present invention, by setting a casing on the outside of the oil pipe, can reduce the wear of the oil pipe, reduce the risk of damage to the oil pipe, improve the pressure resistance of the oil pipe, reduce the risk of oil pipe slope rupture, and improve the explosion-proof ability of the oil pipe. The conductive coating printed inside the casing serves as the sensing electrode, the grounded reinforcement layer serves as the reference electrode, the outer protective layer between the conductive coating and the reinforcement layer serves as the insulating layer, and the capacitive sensor detects the capacitance change of the conductive coating. Before the oil pipe ruptures, the internal pressure of the oil pipe is reduced to prevent the oil pipe from rupture, avoid the rupture that may occur after the oil pipe bulges, prevent further leakage and accidents, and make the oil pipe have active explosion-proof ability. The buffer chamber is set to provide a buffer space for the deformation of the oil pipe, release the internal pressure of the oil pipe, slow down the speed of the oil pipe bulging, provide time for the control system to react, and improve the explosion-proof ability of the oil pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the explosion-proof oil pipe of the present invention; Figure 2 is a cross-sectional view of the oil pipe; Figure 3 is a cross-sectional view of the first pipe joint; Figure 4 is a schematic diagram of the first clamp; Figure 5 This is a schematic diagram of the structure of the explosion-proof oil pipe in one of the embodiments; Figure 6This is one of the embodiments, a cross-sectional view of the oil pipe.

[0018] In the figure: 1. oil pipe, 11. inner layer, 12. reinforcement layer, 121. metal layer, 13. outer protective layer, 14. grounding layer, 2. first pipe joint, 21. connecting head, 22. sealing head, 23. nut, 24. stopper, 3. second pipe joint, 4. casing, 41. reinforcing rib, 42. conductive coating, 5. shielding tube, 6. first clamp, 61. insert gear, 7. grounding ring, 8. second clamp. DETAILED DESCRIPTION

[0019] Example 1 like Figure 1-2 An explosion-proof oil pipe shown includes an oil pipe 1, one end of the oil pipe 1 is connected to a first pipe joint 2, and the end of the oil pipe 1 away from the first pipe joint 2 is connected to a second pipe joint 3. A casing 4 is sleeved on the outside of the oil pipe 1, and the casing 4 pressurizes the oil pipe 1. The outer wall of the casing 4 is provided with reinforcing ribs 41, and the reinforcing ribs 41 are arranged in a grid shape. The oil pipe 1 includes an inner layer 11, a reinforcing layer 12, and an outer protective layer 13. The inner layer 11, the reinforcing layer 12, and the outer protective layer 13 are arranged in sequence from the inside to the outside. The reinforcing layer 12 is set as a metal mesh. The inner layer 11 is made of oil-resistant and chemical-resistant nitrile rubber. The outer protective layer 13 is set as a fire-proof and wear-resistant rubber material. The reinforcing layer 12 is grounded, and the inner layer of the casing 4 is printed with a conductive coating 42, and the conductive coating 42 is electrically connected to the capacitive sensor. At this time, the conductive coating 42 printed inside the sleeve 4 serves as a sensing electrode, the grounded reinforcement layer 12 serves as a reference electrode, the outer protective layer 13 between the conductive coating 42 and the reinforcement layer 12 serves as an insulating layer, and the capacitive sensor detects the capacitance change of the conductive coating 42 .

[0020] According to the capacitance calculation formula: C= ; (The above is is the dielectric constant of the insulating medium, S is the relative effective area of ​​the two electrodes, and d is the distance between the two electrodes). When the distance between the conductive coating 42 and the reinforcement layer 12 changes, the capacitance detected by the capacitive sensor changes. In normal working conditions, the conductive coating 42 and the reinforcement layer 12 remain stable. When the oil pipe is damaged and cannot withstand normal working pressure, the oil pipe will bulge. When the oil pipe is about to bulge, the inner layer 11 of the oil pipe will first expand slightly outward, resulting in a decrease in the distance between the conductive coating 42 and the reinforcement layer 12. At the same time, the dielectric constant of the outer protective layer 13 as an insulating layer changes, and the effective area changes due to local deformation. The capacitance detected by the capacitive sensor changes, and the capacitive sensor sends a signal to the control system. The control system immediately closes the control valve and cuts off the power supply. Before the oil pipe ruptures, the internal pressure of the oil pipe is reduced to prevent the possible rupture of the oil pipe after bulging, prevent further leakage and accidents, and make the oil pipe have active explosion-proof capabilities.

[0021] like Figure 3 The explosion-proof oil pipe shown, the first pipe joint 2 includes a connecting head 21, the connecting head 21 is integrally connected to a sealing head 22, the sealing head 22 is set to be conical, a nut 23 is connected to the outside of the sealing head 22, and a stopper 24 is provided at one end of the nut 23 close to the connecting head 21, and the stopper 24 is provided on the side of the sealing head 22 close to the connecting head 21. When the oil pipe needs to be connected, the oil outlet of the nut 23 is threadedly connected, and the stopper 24 seals the sealing head 22 and the oil pipe 1. A sealing bushing is provided at one end of the sealing head 22 close to the stopper 24, and the sealing bushing seals the stopper 24 and the sealing head 22 during the connection process. The second pipe joint 3 is configured in the same manner as the first pipe joint 2, the second pipe joint 3 is inserted into the oil pipe 1, and a second clamp 8 is provided on the outside of the oil pipe 1, and the second clamp 8 crimps the oil pipe 1 to the outside of the second pipe joint 3. An annular inverted tooth is provided on the outside of the connecting head 21, the connecting head 21 is inserted into the oil pipe 1, and a first clamp 6 is provided on the outside of the oil pipe 1 (see Figure 2 ), the first clamp 6 presses the oil pipe 1 to the outside of the connecting head 21.

[0022] like Figure 4 In the explosion-proof oil pipe shown, a tooth 61 is provided inside the first clamp 6, and the tooth 61 is provided on the inner wall of the first clamp 6. The first clamp 6 squeezes the oil pipe 1, and the tooth 61 penetrates the reinforcement layer 12, and the tooth 61 is connected to the reinforcement layer 12. The tooth 61 is provided inside the first clamp 6 to improve the connection strength between the first pipe joint 2 and the oil pipe 1. The tooth 61 is connected to the reinforcement layer 12, and a grounding ring 7 is provided outside the first clamp 6, and the grounding ring 7 is grounded. The grounding ring 7 abuts against the first clamp 6 to form an electrical connection, so that the reinforcement layer 12 is grounded, and the reinforcement layer 12 becomes a reference electrode.

[0023] Example 2 like Figure 5-6 The explosion-proof oil pipe shown includes an oil pipe 1, one end of the oil pipe 1 is connected to a first pipe joint 2, and the end of the oil pipe 1 away from the first pipe joint 2 is connected to a second pipe joint 3. A sleeve 4 is sleeved on the outside of the oil pipe 1, and the sleeve 4 pressurizes the oil pipe 1. The outer wall of the sleeve 4 is provided with reinforcing ribs 41, and the reinforcing ribs 41 are arranged in a grid shape. A shielding tube 5 is provided on the outside of the sleeve 4, and the inner side of the shielding tube 5 abuts against the reinforcing ribs 41 to form a buffer cavity 51, and the shielding tube 5 is set as conductive rubber. The oil pipe 1 includes an inner layer 11, a reinforcing layer 12, and an outer protective layer 13. The inner layer 11, the reinforcing layer 12, and the outer protective layer 13 are arranged in sequence from the inside to the outside. The reinforcing layer 12 is set as a metal mesh. The inner layer 11 is made of oil-resistant and chemically resistant nitrile rubber. The outer protective layer 13 is set as a fire-resistant and wear-resistant rubber material. The reinforcing layer 12 is grounded, and the inner layer of the sleeve 4 is printed with a conductive coating 42, and the conductive coating 42 is electrically connected to the capacitive sensor. At this time, the conductive coating 42 printed inside the sleeve 4 serves as a sensing electrode, the grounded reinforcement layer 12 serves as a reference electrode, the outer protective layer 13 between the conductive coating 42 and the reinforcement layer 12 serves as an insulating layer, and the capacitive sensor detects the capacitance change of the conductive coating 42 .

[0024] According to the capacitance calculation formula: C= ; (The above is is the dielectric constant of the insulating medium, S is the relative effective area of ​​the two electrodes, and d is the distance between the two electrodes). When the distance between the conductive coating 42 and the reinforcement layer 12 changes, the capacitance detected by the capacitive sensor changes. In normal working state, the conductive coating 42 and the reinforcement layer 12 remain in a stable state. When the oil pipe is damaged and cannot withstand normal working pressure, the oil pipe will bulge. When the oil pipe is about to bulge, the inner layer 11 of the oil pipe will first expand slightly outward, resulting in a reduction in the distance between the conductive coating 42 and the reinforcement layer 12. At the same time, the dielectric constant of the outer protective layer 13 as an insulating layer changes, and the effective area changes due to local deformation. The capacitance detected by the capacitive sensor changes, and the capacitive sensor sends a signal to the control system. The control system immediately closes the control valve and cuts off the power supply. Before the oil pipe ruptures, the internal pressure of the oil pipe is reduced to prevent the possible rupture of the oil pipe after bulging, prevent further leakage and accidents, and make the oil pipe have active explosion-proof capability. When the oil pipe is deformed, the casing 4 deforms outward into the buffer chamber 51, releases the internal pressure of the oil pipe, slows down the bulging speed of the oil pipe, provides time for the control system to react, and improves the explosion-proof capability of the oil pipe.

[0025] like Figure 3 The explosion-proof oil pipe shown, the first pipe joint 2 includes a connecting head 21, the connecting head 21 is integrally connected to a sealing head 22, the sealing head 22 is set to be conical, a nut 23 is connected to the outside of the sealing head 22, and a stopper 24 is provided at one end of the nut 23 close to the connecting head 21, and the stopper 24 is provided on the side of the sealing head 22 close to the connecting head 21. When the oil pipe needs to be connected, the oil outlet of the nut 23 is threadedly connected, and the stopper 24 seals the sealing head 22 and the oil pipe 1. A sealing bushing is provided at one end of the sealing head 22 close to the stopper 24, and the sealing bushing seals the stopper 24 and the sealing head 22 during the connection process. The second pipe joint 3 is configured in the same manner as the first pipe joint 2, the second pipe joint 3 is inserted into the oil pipe 1, and a second clamp 8 is provided on the outside of the oil pipe 1, and the second clamp 8 crimps the oil pipe 1 to the outside of the second pipe joint 3. An annular inverted tooth is provided on the outside of the connecting head 21, the connecting head 21 is inserted into the oil pipe 1, and a first clamp 6 is provided on the outside of the oil pipe 1 (see Figure 2 ), the first clamp 6 presses the oil pipe 1 to the outside of the connecting head 21.

[0026] like Figure 4In the explosion-proof oil pipe shown, a tooth 61 is provided inside the first clamp 6, and the tooth 61 is provided on the inner wall of the first clamp 6. The first clamp 6 squeezes the oil pipe 1, and the tooth 61 penetrates the reinforcement layer 12, and the tooth 61 is connected to the reinforcement layer 12. The tooth 61 is provided inside the first clamp 6 to improve the connection strength between the first pipe joint 2 and the oil pipe 1. The tooth 61 is connected to the reinforcement layer 12, and a grounding ring 7 is provided outside the first clamp 6, and the grounding ring 7 is grounded. The grounding ring 7 abuts against the first clamp 6 to form an electrical connection, so that the reinforcement layer 12 is grounded, and the reinforcement layer 12 becomes a reference electrode.

[0027] The above embodiments are exemplary, and their purpose is to illustrate the technical concept and features of the present invention so that people familiar with this field can understand the content of the present invention and implement it accordingly, and they cannot limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An explosion-proof oil pipe, characterized in that: The oil pipe (1) comprises an oil pipe (1), one end of the oil pipe (1) is connected to a first pipe joint (2), and one end of the oil pipe (1) away from the first pipe joint (2) is connected to a second pipe joint (3); a sleeve (4) is sleeved on the outside of the oil pipe (1), and the sleeve (4) pressurizes the oil pipe (1).

2. The explosion-proof oil pipe according to claim 1, characterized in that: The outer side wall of the sleeve (4) is provided with reinforcing ribs (41), and the reinforcing ribs (41) are arranged in a grid shape.

3. The explosion-proof oil pipe according to claim 2, characterized in that: The oil pipe (1) comprises an inner layer (11), a reinforcement layer (12), and an outer protective layer (13); the inner layer (11), the reinforcement layer (12), and the outer protective layer (13) are arranged in sequence from the inside to the outside; and the reinforcement layer (12) is a metal mesh.

4. The explosion-proof oil pipe according to claim 3, characterized in that: The reinforcement layer (12) is grounded, and a conductive coating (42) is printed on the inner layer of the sleeve (4), and the conductive coating (42) is electrically connected to the capacitive sensor.

5. The explosion-proof oil pipe according to claim 4, characterized in that: A shielding tube (5) is provided on the outside of the sleeve (4), and the inside of the shielding tube (5) abuts against the reinforcing rib (41) to form a buffer cavity (51).

6. The explosion-proof oil pipe according to claim 4, characterized in that: The first pipe joint (2) comprises a connecting head (21), the connecting head (21) being integrally connected to a sealing head (22), the sealing head (22) being arranged in a conical shape, a nut (23) being connected to the outside of the sealing head (22), a stopper (24) being arranged at one end of the nut (23) close to the connecting head (21), the stopper (24) being arranged at one side of the sealing head (22) close to the connecting head (21).

7. The explosion-proof oil pipe according to claim 6, characterized in that: The outer side of the connector (21) is provided with an annular inverted tooth. The connector (21) is inserted into the oil pipe (1). The outer side of the oil pipe (1) is provided with a first clamp (6). The first clamp (6) presses the oil pipe (1) to the outer side of the connector (21).

8. The explosion-proof oil pipe according to claim 7, characterized in that: The inner side wall of the first clamp (6) is provided with a toothing (61), the first clamp (6) squeezes the oil pipe (1), the toothing (61) penetrates the reinforcement layer (12), and the toothing (61) and the reinforcement layer (12) are connected.

9. The explosion-proof oil pipe according to claim 8, characterized in that: A grounding ring (7) is provided on the outer side of the first clamp (6), and the grounding ring (7) is grounded.

10. The explosion-proof oil pipe according to claim 6, characterized in that: The second pipe joint (3) is configured identically to the first pipe joint (2); the second pipe joint (3) is inserted into the oil pipe (1); a second clamp (8) is provided on the outside of the oil pipe (1); the second clamp (8) presses the oil pipe (1) onto the outside of the second pipe joint (3).

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