Gas pipeline explosion relief valve

Abstract

The utility model discloses an explosion relief valve for a gas pipeline, which belongs to the technical field of valves and comprises a valve body, a top cover is mounted at the top of the valve body, a transverse pipe is arranged at the bottom of the valve body, a plugging mechanism is arranged in the middle of the transverse pipe, and an adjustable pressure relief mechanism is arranged in the middle of the valve body. According to the utility model, the plugging mechanism is arranged, in the process, through the output of the electric push rod, the plugging block realizes the plugging and closing of the pipeline at the bottom of the valve body, so that the bottom of the valve body is in a plugging state, and the plugging of the bottom of the valve body is realized when the valve body is overhauled and accessories are replaced; the pressure relief mechanism in the valve body can be overhauled under the normal operation state of the gas pipeline, and the efficiency and safety of valve body overhauling are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially is related to a gas pipeline explosion -proof safety valve. BACKGROUND

[0002] In modern city infrastructure construction, as the key link of energy transmission, the safety of gas pipeline system is directly related to the life and property safety of the public and the stable operation of the society. In order to prevent and reduce the occurrence of gas explosion accidents, the safety valve as an important safety protection device in the gas pipeline system plays a crucial role. The safety valve can automatically open when the pressure in the pipeline exceeds the preset safety threshold, release the excess pressure, prevent the pipeline from rupturing or exploding due to overpressure, and thus ensure the safe operation of the pipeline system.

[0003] The sealing ring inside the existing gas pipeline safety valve will age over time, resulting in poor sealing effect. The sealing ring needs to be replaced by the staff. However, the replacement of the sealing ring in the safety valve is difficult and the steps are complicated, which is inconvenient to use.

[0004] The existing patent (publication number: CN217272147U) provides a gas pipeline explosion -proof safety valve. The gas pipeline explosion -proof safety valve provided by the utility model can be conveniently replaced by rotating the cap manually, separating the cap from the fixed groove, and then taking out the cap together with the elastic structure and the blocking block from the inside of the fixed groove, so that the sealing ring can be replaced. The operation steps are simple, which provides great convenience for the staff.

[0005] In view of the above problems, the existing patent provides a solution, but cannot block the bottom of the safety valve during maintenance, which leads to the problem that the gas pipeline needs to be closed during maintenance of the safety valve, resulting in the problem that the gas pipeline cannot be used normally.

[0006] Therefore, a gas pipeline explosion -proof safety valve is proposed. UTILITY MODEL CONTENTS

[0007] The utility model aims at providing a gas pipeline explosion -proof safety valve, which can solve the problem that the existing gas pipeline explosion -proof safety valve cannot block the bottom of the safety valve during maintenance, which leads to the problem that the safety valve needs to be closed during maintenance, resulting in the problem that the gas pipeline cannot be used normally.

[0008] To achieve the above purpose, the utility model provides the following technical scheme: a gas pipeline explosion -proof safety valve, comprising a valve body, a top cover installed on the top of the valve body, a cross pipe provided at the bottom of the valve body, a blocking mechanism provided at the middle of the cross pipe, and an adjustable pressure relief mechanism provided at the middle of the valve body.

[0009] The plugging mechanism comprises a plugging block arranged at both ends of the cross pipe, a side wall of the plugging block is provided with a electric push rod, an output end of the electric push rod is fixedly connected with a plug, the plug is movably arranged in the cross pipe, and the width of the plug is greater than the diameter of the channel at the bottom of the valve body.

[0010] Preferably, the adjustable pressure relief mechanism comprises a plugging ring arranged at the bottom of the valve body, a pressure relief head is movably arranged in the plugging ring, the top of the pressure relief head is fixedly connected with a pressure relief rod, the middle of the top cover is threadedly connected with an adjusting screw, the bottom of the adjusting screw is provided with a movable groove, the top of the pressure relief rod is movably arranged in the movable groove, the bottom of the pressure relief rod is fixedly connected with a fixed disc, the top of the pressure relief rod is movably arranged with a movable disc, the fixed disc and the movable disc are provided with a supporting spring, and the bottom of the adjusting screw is movably connected with the movable disc.

[0011] Preferably, the bottom of the top cover is fixedly connected with an insertion ring, the insertion ring is movably connected with the valve body, and the movable disc is movably connected with the insertion ring.

[0012] Preferably, a pressure relief pipeline is arranged on the side wall of the valve body, a connecting flange is arranged on the side wall of the pressure relief pipeline, and the pressure relief pipeline is connected with an external pipeline through the connecting flange.

[0013] Preferably, the bottom of the pressure relief head is fixedly connected with a plurality of guide supporting blocks, and the side wall of the guide supporting blocks is in contact with the plugging ring.

[0014] Preferably, sealing rings are arranged at both ends of the plug, and the side wall of the sealing ring is in contact with the inner wall of the cross pipe.

[0015] Preferably, a detection port is arranged on the side wall of the valve body, and the detection port is threadedly connected with a plugging screw.

[0016] Preferably, a rotating handle is fixedly connected to the top of the adjusting screw.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] 1. The plugging mechanism is arranged, and the plugging block is closed to the pipeline at the bottom of the valve body through the output of the electric push rod, so that the bottom of the valve body is in a plugging state, the plugging of the bottom of the valve body is realized when the valve body is overhauled and spare parts are replaced, the valve body is overhauled under normal operation of the gas pipeline, and the efficiency and safety of the valve body overhaul are improved.

[0019] 2. The application sets an adjustable pressure relief mechanism, which can accurately adjust the pressure relief pressure according to the actual working condition, and timely and accurately open the pressure relief when the pressure in the gas pipeline exceeds the safe range, effectively avoiding serious safety accidents such as pipeline explosion and rupture caused by excessive pressure, providing reliable safety protection for the gas pipeline system. The blocking mechanism and the adjustable pressure relief mechanism cooperate with each other to ensure normal gas transmission during normal operation, and can quickly cut off the gas supply or relieve pressure in abnormal conditions, forming double protection, greatly reducing the risk of gas leakage and explosion. By rotating the adjusting screw, the pressure relief pressure of the safety valve can be conveniently adjusted in a wide range to meet the use of gas pipeline systems of different pressure grades and working conditions, and improve the versatility and adaptability of the safety valve. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiment of the present application or the technical scheme in the prior art, the drawings needed in the specific embodiment or the prior art description will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0021] Figure 1 It is the overall structure view of the present application;

[0022] Figure 2 It is the structure schematic view of the blocking block and the electric push rod in the present application;

[0023] Figure 3 It is the left view of the present application;

[0024] Figure 4 It is the present application Figure 3 It is the sectional view schematic diagram of A-A in the present application;

[0025] Figure 5 It is the structure schematic view of the adjustable pressure relief mechanism in the present application.

[0026] Explanation of reference signs:

[0027] 1, valve body; 2, top cover; 3, cross pipe; 4, blocking mechanism; 5, adjustable pressure relief mechanism; 41, blocking block; 42, electric push rod; 43, plug; 51, blocking ring; 52, pressure relief head; 53, pressure relief rod; 54, adjusting screw; 55, movable groove; 56, fixed disc; 57, movable disc; 58, supporting spring; 6, insertion ring; 7, pressure relief pipeline; 8, connecting flange; 9, guide support block; 10, sealing ring; 11, detection port; 12, blocking screw; 13, rotating handle. DETAILED DESCRIPTION

[0028] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0029] Please refer to Figures 1 to 5 The present application provides a technical solution:

[0030] A gas pipeline explosion-proof safety valve, comprising a valve body 1, a top cover 2 is installed on the top of the valve body 1, a cross pipe 3 is arranged at the bottom of the valve body 1, a plugging mechanism 4 is arranged at the middle of the cross pipe 3, and an adjustable pressure relief mechanism 5 is arranged at the middle of the valve body 1.

[0031] The plugging mechanism 4 comprises a plug 41 arranged at both ends of the cross pipe 3, an electric push rod 42 is bolted on the side wall of the plug 41, the output end of the electric push rod 42 is fixedly connected with a plug head 43, the plug head 43 is movably arranged in the inside of the cross pipe 3, and the width of the plug head 43 is greater than the diameter of the channel at the bottom of the valve body 1.

[0032] Specifically, as shown in Figure 2 The side wall of the valve body 1 is provided with a pressure relief pipeline 7, the side wall of the pressure relief pipeline 7 is provided with a connecting flange 8, and the pressure relief pipeline 7 is connected with an external pipeline through the connecting flange 8.

[0033] Specifically, as shown in Figure 4 Both ends of the plug head 43 are provided with a sealing ring 10, and the side wall of the sealing ring 10 is in contact with the inner wall of the cross pipe 3.

[0034] Specifically, as shown in Figure 4 The side wall of the valve body 1 is provided with a detection port 11, and the inside of the detection port 11 is threadedly connected with a plugging screw 12.

[0035] In use, when the gas pipeline normally delivers gas, the electric push rod 42 is in the initial state, the plug 43 is away from the bottom passage of the valve body 1 under the action of the output end of the electric push rod 42, so that the gas can be smoothly delivered through the cross pipe 3 and the bottom passage of the valve body 1, so that the valve body 1 can normally perform the anti-explosion pressure relief operation, when the valve body 1 needs to be overhauled, the bottom passage of the valve body 1 is blocked, the electric push rod 42 is started, the output end of the electric push rod 42 pushes the plug 43 to move inside the cross pipe 3 until the plug 43 moves to the position of the bottom passage of the valve body 1, because the width of the plug 43 is greater than the diameter of the bottom passage of the valve body 1, at this time the plug 43 completely blocks the bottom passage of the valve body 1, preventing the gas from continuing to pass through, the sealing ring 10 is installed at both ends of the plug 43, when the plug 43 blocks the bottom passage of the valve body 1, the side wall of the sealing ring 10 is in close contact with the inner wall of the cross pipe 3, further enhancing the sealing of the blockage, preventing gas leakage, when the pressure in the gas pipeline exceeds the set value, the adjustable pressure relief mechanism 5 is started, the gas is discharged through the pressure relief pipeline 7 on the side wall of the valve body 1, the pressure relief pipeline 7 is connected with the external pipeline through the connecting flange 8, which can safely guide the discharged gas to the designated area, avoiding the accumulation of gas around the valve body 1, reducing the risk of explosion and other dangerous accidents, the detection port 11 provided on the side wall of the valve body 1 provides a channel for the staff to detect the inside of the valve body 1, when it is necessary to check the working condition, component wear condition or maintenance of the inside of the valve body 1, the staff can unscrew the blocking screw 12 screwed in the inside of the detection port 11, and extend the detection equipment into the inside of the valve body 1 through the detection port 11 for detection operation, after detection, the blocking screw 12 is screwed into the detection port 11 again to ensure the sealing of the valve body 1.

[0036] Specifically, as shown in Figure 5 , the adjustable pressure relief mechanism 5 comprises a blocking ring 51 arranged at the bottom of the valve body 1, a pressure relief head 52 movably arranged in the inside of the blocking ring 51, the top of the pressure relief head 52 is fixedly connected with a pressure relief rod 53, a adjusting screw 54 is threadedly connected with the middle of the top cover 2, the bottom of the adjusting screw 54 is provided with a movable groove 55, the top of the pressure relief rod 53 is movably arranged in the inside of the movable groove 55, the bottom of the pressure relief rod 53 is fixedly connected with a fixed disc 56, the top of the pressure relief rod 53 is movably arranged with a movable disc 57, a supporting spring 58 is arranged between the fixed disc 56 and the movable disc 57, and the bottom of the adjusting screw 54 is movably connected with the movable disc 57.

[0037] Specifically, as shown in Figure 5 , the bottom of the top cover 2 is fixedly connected with a plug ring 6, the plug ring 6 is movably connected with the valve body 1, and the movable disc 57 is movably connected with the plug ring 6.

[0038] Specifically, as shown in Figure 5 , the bottom of the pressure relief head 52 is fixedly connected with a plurality of guide support blocks 9, and the side wall of the guide support block 9 is in contact with the blocking ring 51.

[0039] Specifically, as shown in Figure 5 The top of the adjusting screw 54 is fixedly connected with a rotating handle 13.

[0040] In use, when the gas pipeline is in normal operation, the pressure in the pipeline is within a safe range, at this time, the pressure relief head 52 is tightly attached to the blocking ring 51 at the bottom of the valve body 1 under the elastic force of the supporting spring 58, forming a sealed state, preventing gas from leaking through the adjustable pressure relief mechanism 5, and ensuring that the gas can be normally transported through the valve body 1. When it is necessary to adjust the pressure relief pressure of the safety valve, the staff rotates the adjusting screw 54 through the rotating handle 13. Since the adjusting screw 54 is threadedly connected with the middle part of the top cover 2, rotating the adjusting screw 54 will make it move up and down in the top cover 2. The movable groove 55 formed at the bottom of the adjusting screw 54 is movably connected with the top of the pressure relief rod 53, and the bottom of the adjusting screw 54 is movably connected with the movable disc 57. When the adjusting screw 54 moves up and down, the spacing between the movable disc 57 and the fixed disc 56 is adjusted, the compression degree of the supporting spring 58 is adjusted, the compression degree of the supporting spring 58 is changed, and thus the elastic force of the supporting spring 58 on the pressure relief head 52 is changed, thereby realizing the adjustment of the pressure relief pressure of the safety valve. When the pressure in the gas pipeline exceeds the set safety pressure value, the force of the gas acting on the pressure relief head 52 is greater than the elastic force of the supporting spring 58, which pushes the pressure relief head 52 to move upward, so that a gap is generated between the pressure relief head 52 and the blocking ring 51. The gas is discharged from the pressure relief pipeline 7 on the side wall of the valve body 1 through the gap, thereby reducing the pressure in the pipeline. As the pressure in the pipeline decreases, when the force of the gas acting on the pressure relief head 52 is less than the elastic force of the supporting spring 58, the supporting spring 58 pushes the pressure relief head 52 to move downward, so that the pressure relief head 52 is tightly attached to the blocking ring 51 again, the pressure relief is stopped, and the pressure in the pipeline is kept within a safe range. The plurality of guide supporting blocks 9 fixedly arranged at the bottom of the pressure relief head 52 are in contact with the blocking ring 51, and play a guiding role in the process of moving the pressure relief head 52 upward and downward, thereby ensuring the stability and accuracy of the movement of the pressure relief head 52, preventing the pressure relief head 52 from deviating during the movement, and affecting the sealing effect. The insertion ring 6 at the bottom of the top cover 2 is movably connected with the valve body 1, the movable disc 57 is movably connected with the insertion ring 6, and the insertion ring 6 provides stable support and guidance for the movable disc 57, so that the movable disc 57 can move stably under the action of the adjusting screw 54 and the supporting spring 58, thereby further ensuring the working stability of the adjustable pressure relief mechanism 5.

[0041] By adopting the above technical scheme, the problem that the existing gas pipeline explosion-proof safety valve cannot block the bottom of the safety valve during maintenance of the safety valve is solved, and the problem that the safety valve needs to be closed during maintenance, thereby causing the gas pipeline to be unable to be normally used is solved.

[0042] Working principle: when the application is used, first, when the gas pipeline is in normal operation, the pressure in the pipeline is within the safe range, at this time, the pressure relief head 52 is tightly attached to the blocking ring 51 at the bottom of the valve body 1 under the elastic force of the supporting spring 58, forming a sealed state, preventing gas from leaking through the adjustable pressure relief mechanism 5, ensuring that the gas can be normally transported through the valve body 1, when the pressure in the gas pipeline exceeds the set safety pressure value, the force of the gas on the pressure relief head 52 is greater than the elastic force of the supporting spring 58 to push the pressure relief head 52 to move upward, so that the gap between the pressure relief head 52 and the blocking ring 51 is generated, the gas is discharged from the pressure relief pipeline 7 on the side wall of the valve body 1 through the gap, reducing the pressure in the pipeline, with the decrease of the pressure in the pipeline, when the force of the gas on the pressure relief head 52 is less than the elastic force of the supporting spring 58, the supporting spring 58 pushes the pressure relief head 52 to move downward, reattaching the blocking ring 51 tightly, stopping pressure relief, keeping the pressure in the pipeline within the safe range, when the valve body 1 needs to be overhauled, the valve body 1 bottom passage is blocked, the electric push rod 42 is started, the output end of the electric push rod 42 pushes the plug 43 to move inside the cross pipe 3, until the plug 43 moves to the position of the valve body 1 bottom passage, because the width of the plug 43 is greater than the diameter of the valve body 1 bottom passage, at this time the plug 43 completely blocks the valve body 1 bottom passage, preventing the gas from continuing to pass through.

[0043] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A gas pipeline explosion-proof safety valve, comprising a valve body (1), characterized in that: The valve body (1) is equipped with a top cover (2), the bottom of the valve body (1) is provided with a horizontal pipe (3), the middle of the horizontal pipe (3) is provided with a sealing mechanism (4), and the middle of the valve body (1) is provided with an adjustable pressure relief mechanism (5). The sealing mechanism (4) includes a block (41) disposed at both ends of the horizontal tube (3). An electric push rod (42) is bolted to the side wall of the block (41). A plug (43) is fixedly connected to the output end of the electric push rod (42). The plug (43) is movably disposed inside the horizontal tube (3). The width of the plug (43) is greater than the diameter of the bottom channel of the valve body (1).

2. The explosion-proof safety valve for gas pipelines according to claim 1, characterized in that: The adjustable pressure relief mechanism (5) includes a sealing ring (51) disposed at the bottom of the valve body (1), a pressure relief head (52) is movably disposed inside the sealing ring (51), the top of the pressure relief head (52) is fixedly connected to the pressure relief rod (53), an adjusting screw (54) is threadedly connected to the middle of the top cover (2), a movable groove (55) is opened at the bottom of the adjusting screw (54), the top of the pressure relief rod (53) is movably disposed inside the movable groove (55), a fixed plate (56) is fixedly connected to the bottom of the pressure relief rod (53), a movable plate (57) is movably disposed at the top of the pressure relief rod (53), a support spring (58) is disposed between the fixed plate (56) and the movable plate (57), and the bottom of the adjusting screw (54) is movably connected to the movable plate (57).

3. The explosion-proof safety valve for gas pipelines according to claim 2, characterized in that: The bottom of the top cover (2) is fixedly connected to a plug ring (6), the plug ring (6) is movably connected to the valve body (1), and the movable disc (57) is movably connected to the plug ring (6).

4. The explosion-proof safety valve for gas pipelines according to claim 1, characterized in that: A pressure relief pipe (7) is provided on the side wall of the valve body (1), and a connecting flange (8) is provided on the side wall of the pressure relief pipe (7). The pressure relief pipe (7) is connected to an external pipe through the connecting flange (8).

5. The explosion-proof safety valve for gas pipelines according to claim 2, characterized in that: The bottom of the pressure relief head (52) is fixedly connected to a plurality of guide support blocks (9), and the sidewall of the guide support block (9) is in contact with the sealing ring (51).

6. The explosion-proof safety valve for gas pipelines according to claim 1, characterized in that: Both ends of the plug (43) are equipped with sealing rings (10), and the sidewall of the sealing ring (10) is in contact with the inner wall of the horizontal tube (3).

7. The explosion-proof safety valve for gas pipelines according to claim 1, characterized in that: The valve body (1) has a detection port (11) on its side wall, and a sealing screw (12) is threaded inside the detection port (11).

8. The explosion-proof safety valve for gas pipelines according to claim 2, characterized in that: The top of the adjusting screw (54) is fixedly connected to a rotating handle (13).

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