Explosion blocking and relief device for pipelines

Abstract

The invention discloses an explosion blocking and releasing device for pipelines, belongs to the technical field of gas transmission safety protection, and provides an explosion blocking and releasing device which can be closed in milliseconds and easily reset; the technical scheme is as follows: the explosion blocking and releasing device for pipelines comprises: a device body, a front support frame, a rear support frame, a sealing plate, a main shaft, a sealing ring and a resetting device; the device body is a tubular structure with openings at both ends, a front support frame and a rear support frame are fixed in the device body, the front support frame and the rear support frame are composed of a plurality of straight rods and a pipe sleeve fixed in the middle of the straight rods, a sealing plate is arranged between the front support frame and the rear support frame, a main shaft is arranged on the sealing plate, the main shaft passes through the pipe sleeve, and can slide back and forth relative to the pipe sleeve, a sealing ring is arranged on the inner wall of the device body between the front support frame and the sealing plate, the sealing plate and the sealing ring cooperate with each other, the resetting device is arranged on the main shaft, and the resetting device can adjust the main shaft to reciprocate along the center line of the pipe sleeve.

Description

Technical Field

[0001] The invention discloses an explosion blocking and releasing device for pipelines, which belongs to the technical field of gas transmission safety protection, and specifically relates to a gas pipeline explosion-proof device. Background Art

[0002] At present, there is a need for explosion safety protection in pipeline transportation of flammable and explosive media such as natural gas, gas, coalbed methane, hydrogen, combustible dust, chemical gas, etc. Existing explosion protection mostly uses dry flame arresters, explosion vents, backfire prevention, explosion suppression devices, etc. These technologies can be applied to different protection needs, but there is a risk of failure in over-fire blocking explosion. In order to achieve effective physical blocking, a valve-type shut-off transmission device is required. Existing valves are usually manual or electric, but the closing time is long, and they do not have an explosion-proof effect in terms of explosion protection.

[0003] In addition, the existing valve cannot be reset after blocking the explosion and needs to be disassembled and reinstalled to ventilate the pipeline. On the one hand, it is not conducive to the rapid recovery of production, and on the other hand, it increases the production cost investment. Summary of the invention

[0004] The present invention overcomes the shortcomings of the prior art and provides a device for blocking explosion and venting explosion which can be closed in milliseconds and easily reset.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an explosion blocking and release device for pipelines, comprising: a device body, a front support frame, a rear support frame, a sealing plate, a main shaft, a sealing ring and a reset device; the device body is a tubular structure with openings at both ends, a front support frame and a rear support frame are fixed in the device body, the front support frame and the rear support frame are composed of a plurality of straight rods and a pipe sleeve fixed in the middle of the straight rods, a sealing plate is arranged between the front support frame and the rear support frame, a main shaft is arranged on the sealing plate, the main shaft passes through the pipe sleeves of the front support frame and the rear support frame, and the main shaft can slide back and forth relative to the pipe sleeve, a sealing ring is arranged on the inner wall of the device body between the front support frame and the sealing plate, the sealing plate and the sealing ring cooperate with each other, the sealing plate can fit tightly with the sealing ring to seal the device body, the reset device is arranged on the main shaft, and the reset device can adjust the main shaft to reciprocate along the center line of the pipe sleeve.

[0006] A preferred reset device structure: the reset device comprises: a reset handle and a reset dial hole; a reset hole is provided on the tube wall of the device body, the reset hole is a threaded hole, a sealing bolt is provided on the reset dial hole, the reset dial hole is fixed on the main shaft, a hole groove is provided on the reset dial hole, the reset handle is a rod-shaped structure, the end of the reset handle is adapted to the hole groove of the reset dial hole, and the end of the reset handle can be inserted into the hole groove of the reset dial hole.

[0007] Another preferred reset device structure: the reset device includes: a high-pressure cylinder, a reset valve, a cylinder body of the high-pressure cylinder fixed to a rear support frame, a piston of the high-pressure cylinder fixed to a main shaft, the reset valve fixed to an outer tube wall of a device body, the reset valve being a through valve, the reset valve being connected to an air inlet of the high-pressure cylinder, and an air outlet of the high-pressure cylinder being connected to the outside of the device body.

[0008] The pipeline explosion blocking and release device also includes an adjustable rear positioning nut; an external thread is provided on the main shaft, and the adjustable rear positioning nut is screwed on the main shaft between the front support frame and the rear support frame. The adjustable rear positioning nut can be matched with the rear support frame pipe sleeve, and the adjustable rear positioning nut is used to control the distance between one end of the main shaft and the front support frame.

[0009] The pipeline explosion blocking and release device also includes a push rod positioning device, which includes: a positioning groove and a positioning rod, the positioning groove is an annular groove arranged on the main shaft, the positioning rod is fixed to the front support frame, and the positioning rod includes: a positioning sleeve, a positioning ball and a positioning spring; the positioning sleeve is fixed to the front support frame, the positioning sleeve is a tubular structure with openings at both ends, a positioning ball is arranged in the positioning sleeve, one end of the positioning sleeve is arranged with an internal thread, one end of the positioning sleeve is screwed with a locking bolt, and a positioning spring is arranged in the positioning sleeve between the positioning ball and the locking bolt.

[0010] When the adjustable rear positioning nut is fitted on the rear support frame, the positioning ball is tightly fitted on the main shaft.

[0011] The sealing plate is a conical sealing plate, the center of the conical sealing plate is fixed to the main shaft, and a sealing leather pad is arranged on the edge of the conical sealing plate.

[0012] The inner ring of the sealing ring is a conical surface adapted to the sealing plate, and a sealing rubber is arranged on the inner ring of the sealing ring.

[0013] An explosion relief opening is arranged on the pipe wall of the device body between the front support frame and the rear support frame, and an explosion relief baffle is arranged on the explosion relief opening.

[0014] The explosion relief baffle is a stainless steel explosion relief plate or rubber plate or thin aluminum plate with a breaking force not higher than 120kpa. It can be round or square and is used to release the explosion pressure when an explosion occurs. The discharge cross-sectional area of ​​the explosion relief port is not less than the cross-sectional area of ​​the pipeline.

[0015] The device body includes a front end tube, a middle tube and a rear end tube, which are sealed and connected by flanges. The front support frame and the rear support frame are correspondingly arranged at both ends of the middle tube, so that the staff can easily install and debug the parts in the device body.

[0016] When the sealing plate is in the normal open operating position, the airway cross-sectional area of ​​the device body is not less than the cross-sectional area of ​​the main delivery pipe to ensure that the full diameter reduces the airflow resistance coefficient.

[0017] An observation window is arranged on the tube wall of the device body between the front support frame and the rear support frame.

[0018] A manual wiper mechanism is provided on the observation window to prevent dust accumulation on the window or to manually clean it in time for observation when it is intact.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention adopts the front support frame and the rear support frame in combination with the sealing plate to achieve rapid closure under the action of the explosion shock wave, effectively blocking the gas in the pipeline and preventing the explosion from causing more serious consequences.

[0021] Second, the present invention adopts a reset device, which can be quickly operated to open and restore after the sealing plate is closed, which is conducive to the later resumption of production without the need to remove pipeline parts for replacement.

[0022] 3. The present invention adopts a push rod positioning device to realize the control of the main shaft position, thereby ensuring that the sealing plate is in an open state. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention.

[0025] Figure 2 It is a cross-sectional view of embodiment 1 of the present invention.

[0026] Figure 3 This is a schematic diagram of the structure of Example 2 of the present invention.

[0027] Figure 4 It is a cross-sectional view of embodiment 2 of the present invention.

[0028] Figure 5 It is an enlarged schematic diagram of the push rod positioning device of the present invention.

[0029] In the figure: 1 is the device body, 2 is the front support frame, 3 is the rear support frame, 4 is the sealing plate, 5 is the main shaft, 6 is the sealing ring, 7 is the resetting device, 8 is the push rod positioning device, 9 is the adjustable rear positioning nut, 11 is the resetting hole, 12 is the explosion vent, 13 is the observation window, 71 is the resetting handle, 72 is the resetting dial hole, 73 is the high-pressure cylinder, 74 is the resetting valve, 81 is the positioning groove, 82 is the positioning rod, 83 is the positioning sleeve, 84 is the positioning ball, and 85 is the positioning spring. DETAILED DESCRIPTION

[0030] Example 1

[0031] like Figure 1 , Figure 2 and Figure 5 As shown, the explosion blocking and release device for pipeline of the present invention comprises: a device body 1, a front support frame 2, a rear support frame 3, a sealing plate 4, a main shaft 5, a sealing ring 6 and a reset device 7; the device body 1 is a tubular structure with openings at both ends, the front support frame 2 and the rear support frame 3 are fixed in the device body 1, the front support frame 2 and the rear support frame 3 are composed of a plurality of straight rods and a pipe sleeve fixed in the middle of the straight rod, a sealing plate 4 is arranged between the front support frame 2 and the rear support frame 3, a main shaft 5 is arranged on the sealing plate 4, the main shaft 5 passes through the pipe sleeves of the front support frame 2 and the rear support frame 3, and the main shaft 5 can slide reciprocatingly relative to the pipe sleeve, a sealing ring 6 is arranged on the inner wall of the device body 1 between the front support frame 2 and the sealing plate 4, the sealing plate 4 and the sealing ring 6 cooperate with each other, the sealing plate 4 can fit tightly with the sealing ring 6 to seal the device body 1, the reset device 7 is arranged on the main shaft 5, and the reset device 7 can adjust the main shaft 5 to reciprocate along the center line of the pipe sleeve.

[0032] The reset device 7 includes: a reset handle 71 and a reset dial hole 72; a reset hole 11 is provided on the tube wall of the device body 1, the reset hole 11 is a threaded hole, a sealing bolt is provided on the reset dial hole 11, the reset dial hole 72 is fixed to the main shaft 5, a hole groove is provided on the reset dial hole 72, the reset handle 71 is a rod-shaped structure, the end of the reset handle 71 is adapted to the hole groove of the reset dial hole 72, and the end of the reset handle 71 can be inserted into the hole groove of the reset dial hole 72.

[0033] A front impact disk is also provided on the main shaft 5 behind the rear support frame 3 , and the front impact disk can drive the main shaft 5 to quickly respond to the explosion shock wave and accelerate the closing speed of the sealing plate 4 .

[0034] The pipeline explosion blocking and release device also includes an adjustable rear positioning nut 9; an external thread is provided on the main shaft 5, and the adjustable rear positioning nut 9 is screwed on the main shaft 5 between the front support frame 2 and the rear support frame 3. The adjustable rear positioning nut 9 can cooperate with the pipe sleeve of the rear support frame 3, and the adjustable rear positioning nut 9 is used to control the distance between one end of the main shaft 5 and the front support frame 2.

[0035] The pipeline explosion blocking and release device also includes a push rod positioning device 8, which includes: a positioning groove 81 and a positioning rod 82, the positioning groove 81 is an annular groove arranged on the main shaft 5, the positioning rod 82 is fixed to the front support frame 2, and the positioning rod 82 includes: a positioning sleeve 83, a positioning ball 84 and a positioning spring 85; the positioning sleeve 83 is fixed to the front support frame 2, the positioning sleeve 83 is a tubular structure with openings at both ends, a positioning ball 84 is arranged in the positioning sleeve 83, one end of the positioning sleeve 83 is arranged with an internal thread, one end of the positioning sleeve 83 is screwed with a locking bolt, and a positioning spring 85 is arranged in the positioning sleeve 83 between the positioning ball 84 and the locking bolt.

[0036] When the adjustable rear positioning nut 9 is fitted onto the rear support frame 3 , the positioning ball 84 is tightly fitted onto the main shaft 5 .

[0037] The sealing plate 4 is a conical sealing plate, the center of which is fixed to the main shaft 5, and a sealing leather pad is arranged on the edge of the conical sealing plate.

[0038] The inner ring of the sealing ring 6 is a conical surface adapted to the sealing plate 4 , and a sealing rubber is arranged on the inner ring of the sealing ring 6 .

[0039] An explosion vent 12 is provided on the tube wall of the device body 1 between the front support frame 2 and the rear support frame 3 , and an explosion vent baffle is provided on the explosion vent 12 .

[0040] The explosion relief baffle is a stainless steel explosion relief plate or rubber plate or thin aluminum plate with a breaking force not higher than 120kpa. It can be round or square and is used to release the explosion pressure when an explosion occurs. The discharge cross-sectional area of ​​the explosion relief port is not less than the cross-sectional area of ​​the pipeline.

[0041] The device body 1 includes a front end tube, a middle tube and a rear end tube, which are sealed and connected by flanges. The front support frame 2 and the rear support frame 3 are correspondingly arranged at both ends of the middle tube, so that the staff can easily install and debug the parts in the device body 1.

[0042] When the sealing plate 4 is in the normal open operating position, the airway cross-sectional area of ​​the device body is not less than the cross-sectional area of ​​the main delivery pipe to ensure that the full diameter reduces the airflow resistance coefficient.

[0043] An observation window 13 is provided on the tube wall of the device body 1 between the front support frame 2 and the rear support frame 3 .

[0044] A manual wiper mechanism is provided on the observation window 13 to prevent dust accumulation on the window or to manually clean it in time for observation when it is intact.

[0045] Example 2

[0046] like Figures 3 to 5 As shown: the explosion blocking and release device for pipeline of the present invention comprises: a device body 1, a front support frame 2, a rear support frame 3, a sealing plate 4, a main shaft 5, a sealing ring 6 and a reset device 7; the device body 1 is a tubular structure with openings at both ends, the front support frame 2 and the rear support frame 3 are fixed in the device body 1, the front support frame 2 and the rear support frame 3 are composed of a plurality of straight rods and a pipe sleeve fixed in the middle of the straight rod, a sealing plate 4 is arranged between the front support frame 2 and the rear support frame 3, a main shaft 5 is arranged on the sealing plate 4, the main shaft 5 passes through the pipe sleeves of the front support frame 2 and the rear support frame 3, and the main shaft 5 can reciprocate relative to the pipe sleeve, a sealing ring 6 is arranged on the inner wall of the device body 1 between the front support frame 2 and the sealing plate 4, the sealing plate 4 and the sealing ring 6 cooperate with each other, the sealing plate 4 can fit tightly with the sealing ring 6 to seal the device body 1, the reset device 7 is arranged on the main shaft 5, and the reset device 7 can adjust the main shaft 5 to reciprocate along the center line of the pipe sleeve.

[0047] The reset device 7 includes: a high-pressure cylinder 73, a reset valve 74, the cylinder body of the high-pressure cylinder 73 is fixed to the rear support frame 3, the piston of the high-pressure cylinder 73 is fixed to the main shaft 5, the reset valve 74 is fixed on the outer tube wall of the device body 1, the reset valve 74 is a straight-through valve, the reset valve 74 is connected to the air inlet of the high-pressure cylinder 73, and the air outlet of the high-pressure cylinder 73 is connected to the outside of the device body 1.

[0048] The pipeline explosion blocking and release device also includes an adjustable rear positioning nut 9; an external thread is provided on the main shaft 5, and the adjustable rear positioning nut 9 is screwed on the main shaft 5 between the front support frame 2 and the rear support frame 3. The adjustable rear positioning nut 9 can cooperate with the pipe sleeve of the rear support frame 3, and the adjustable rear positioning nut 9 is used to control the distance between one end of the main shaft 5 and the front support frame 2.

[0049] The pipeline explosion blocking and release device also includes a push rod positioning device 8, which includes: a positioning groove 81 and a positioning rod 82, the positioning groove 81 is an annular groove arranged on the main shaft 5, the positioning rod 82 is fixed to the front support frame 2, and the positioning rod 82 includes: a positioning sleeve 83, a positioning ball 84 and a positioning spring 85; the positioning sleeve 83 is fixed to the front support frame 2, the positioning sleeve 83 is a tubular structure with openings at both ends, a positioning ball 84 is arranged in the positioning sleeve 83, one end of the positioning sleeve 83 is arranged with an internal thread, one end of the positioning sleeve 83 is screwed with a locking bolt, and a positioning spring 85 is arranged in the positioning sleeve 83 between the positioning ball 84 and the locking bolt.

[0050] When the adjustable rear positioning nut 9 is fitted onto the rear support frame 3 , the positioning ball 84 is tightly fitted onto the main shaft 5 .

[0051] The sealing plate 4 is a conical sealing plate, the center of which is fixed to the main shaft 5, and a sealing leather pad is arranged on the edge of the conical sealing plate.

[0052] The inner ring of the sealing ring 6 is a conical surface adapted to the sealing plate 4 , and a sealing rubber is arranged on the inner ring of the sealing ring 6 .

[0053] An explosion vent 12 is provided on the tube wall of the device body 1 between the front support frame 2 and the rear support frame 3 , and an explosion vent baffle is provided on the explosion vent 12 .

[0054] The explosion relief baffle is a stainless steel explosion relief plate or rubber plate or thin aluminum plate with a breaking force not higher than 120kpa. It can be round or square and is used to release the explosion pressure when an explosion occurs. The discharge cross-sectional area of ​​the explosion relief port is not less than the cross-sectional area of ​​the pipeline.

[0055] The device body 1 includes a front end tube, a middle tube and a rear end tube, which are sealed and connected by flanges. The front support frame 2 and the rear support frame 3 are correspondingly arranged at both ends of the middle tube, so that the staff can easily install and debug the parts in the device body 1.

[0056] When the sealing plate 4 is in the normal open operating position, the airway cross-sectional area of ​​the device body is not less than the cross-sectional area of ​​the main delivery pipe to ensure that the full diameter reduces the airflow resistance coefficient.

[0057] An observation window 13 is provided on the tube wall of the device body 1 between the front support frame 2 and the rear support frame 3 .

[0058] A manual wiper mechanism is provided on the observation window 13 to prevent dust accumulation on the window or to manually clean it in time for observation when it is intact.

[0059] During operation of the present invention, the sealing plate 4 is acted upon by the explosion shock wave and moves rapidly along with the main shaft 5, thereby realizing the closed explosion-proof function. Meanwhile, the explosion venting port vents the high pressure in the pipe, thereby improving safety.

[0060] When it is necessary to resume production, the reset handle 71 can be passed through the reset hole 11, and the reset dial hole 72 can be inserted into the reset dial hole 72 to move the main shaft to open the sealing plate 4. Through the observation window 13, the positioning ball 84 falls into the positioning groove 81 to determine that the sealing plate 4 is normally opened. At the same time, the push rod positioning device 8 can ensure that the sealing plate 4 will not be in a closed state.

[0061] Alternatively, the sealing plate 4 is controlled to open by the high-pressure cylinder 73, and the process of judging the opening state of the sealing plate 4 is as above.

[0062] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. Explosion blocking and release device for pipeline, characterized by: include: The device comprises a main body (1), a front support frame (2), a rear support frame (3), a sealing plate (4), a main shaft (5), a sealing ring (6) and a reset device (7); the main body (1) of the device is a tubular structure with two ends open; the front support frame (2) and the rear support frame (3) are fixed inside the main body (1); the front support frame (2) and the rear support frame (3) are composed of a plurality of straight rods and a pipe sleeve fixed to the middle of the straight rods; a sealing plate (4) is arranged between the front support frame (2) and the rear support frame (3); the main shaft (5) is arranged on the sealing plate (4); The main shaft (5) passes through the pipe sleeves of the front support frame (2) and the rear support frame (3), and the main shaft (5) can slide back and forth relative to the pipe sleeve. A sealing ring (6) is provided on the inner wall of the device body (1) between the front support frame (2) and the sealing plate (4). The sealing plate (4) and the sealing ring (6) cooperate with each other. The sealing plate (4) can fit tightly with the sealing ring (6) to seal the device body (1). The reset device (7) is provided on the main shaft (5), and the reset device (7) can adjust the main shaft (5) to reciprocate along the center line of the pipe sleeve. The reset device (7) comprises: a reset handle (71) and a reset hole (72); a reset hole (11) is provided on the tube wall of the device body (1); the reset hole (11) is a threaded hole; a sealing bolt is provided on the reset hole (11); the reset hole (72) is fixed to the main shaft (5); a hole groove is provided on the reset hole (72); the reset handle (71) is a rod-shaped structure; the end of the reset handle (71) is adapted to the hole groove of the reset hole (72); and the end of the reset handle (71) can be plugged into the hole groove of the reset hole (72); The reset device (7) comprises: a high-pressure cylinder (73), a reset valve (74), a cylinder body of the high-pressure cylinder (73) being fixed to a rear support frame (3), a piston of the high-pressure cylinder (73) being fixed to a main shaft (5), the reset valve (74) being fixed to an outer tube wall of a device body (1), the reset valve (74) being a through valve, the reset valve (74) being connected to an air inlet of the high-pressure cylinder (73), and an air outlet of the high-pressure cylinder (73) being connected to the outside of the device body (1); The pipeline explosion blocking and release device further comprises an adjustable rear positioning nut (9); the main shaft (5) is provided with an external thread, the adjustable rear positioning nut (9) is screwed onto the main shaft (5) between the front support frame (2) and the rear support frame (3), the adjustable rear positioning nut (9) can be matched with the pipe sleeve of the rear support frame (3), and the adjustable rear positioning nut (9) is used to control the distance between one end of the main shaft (5) and the front support frame (2); The pipeline explosion blocking and release device also includes a push rod positioning device (8), the push rod positioning device (8) including: a positioning groove (81) and a positioning rod (82), the positioning groove (81) is an annular groove arranged on the main shaft (5), the positioning rod (82) is fixed to the front support frame (2), the positioning rod (82) includes: a positioning sleeve (83), a positioning ball (84) and a positioning spring (85); the positioning sleeve (83) is fixed to the front support frame (2), the positioning sleeve (83) is a tubular structure with two ends open, the positioning ball (84) is arranged in the positioning sleeve (83), one end of the positioning sleeve (83) is provided with an internal thread, one end of the positioning sleeve (83) is screwed with a locking bolt, and a positioning spring (85) is arranged in the positioning sleeve (83) between the positioning ball (84) and the locking bolt.

2. The pipeline explosion blocking and release device according to claim 1, characterized in that: When the adjustable rear positioning nut (9) is fitted onto the rear support frame (3), the positioning ball (84) is tightly fitted onto the main shaft (5).

3. The pipeline explosion blocking and release device according to claim 2, characterized in that: The sealing plate (4) is a conical sealing plate, the center of the conical sealing plate is fixed to the main shaft (5), and a sealing leather pad is provided on the edge of the conical sealing plate.

4. The pipeline explosion blocking and release device according to claim 3, characterized in that: The inner ring of the sealing ring (6) is a conical surface adapted to the sealing plate (4), and sealing rubber is provided on the inner ring of the sealing ring (6).

5. The pipeline explosion blocking and release device according to any one of claims 2 to 4, characterized in that: An explosion relief opening (12) is provided on the tube wall of the device body (1) between the front support frame (2) and the rear support frame (3), and an explosion relief baffle is provided on the explosion relief opening (12).

6. The pipeline explosion blocking and release device according to claim 5, characterized in that: An observation window (13) is provided on the tube wall of the device body (1) between the front support frame (2) and the rear support frame (3).

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