Leakage-proof and explosion-proof self-adaptive pressure safety valve

Abstract

The utility model relates to the technical field of safety valves, and discloses a leakage-proof and explosion-proof self-adaptive pressure safety valve which comprises a valve body, a valve cover, a valve seat, a valve clack, a recoil disc, a valve rod, a guide sleeve, a lower spring seat, a spring, an upper spring seat, an adjusting assembly, a discharging pipe, a fire retardant assembly and a connecting pipe. A valve cover is fixedly installed at the top of the valve body, a valve seat and a guide sleeve are fixedly installed in the valve body, a recoil disc is movably installed in the guide sleeve, a valve clack is installed at the lower end of the recoil disc, the lower end face of the valve clack abuts against the upper end face of the valve seat in a matched mode, a valve rod abuts against the top of the recoil disc, and the outer side of the valve rod is sleeved with a lower spring seat and an upper spring seat. Springs are installed at the top of the lower spring seat and the bottom of the upper spring seat, an adjusting assembly capable of adjusting the distance between the lower spring seat and the upper spring seat is arranged at the top of the valve deck, and by means of ingenious application of the adjusting assembly, the applicable pressure of the safety valve can be efficiently, conveniently and accurately adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to a safety valve technical field, concretely is a kind of leakproof explosion-proof self-adapting pressure safety valve. BACKGROUND

[0002] Safety valve is the closing member under the action of external force and is in normally closed state, when the medium pressure in equipment or pipeline rises more than the specified value, it is discharged to system outside to prevent the medium pressure in pipeline or equipment from exceeding the specified value by the special valve.Safety valve belongs to automatic valve, mainly used in boiler, pressure vessel and pipeline, control pressure does not exceed the specified value, and it plays an important protective role for personal safety and equipment operation.

[0003] After searching, find prior art publication number CN221811032U, a kind of spring leakproof safety valve is disclosed, including valve body, valve seat, valve flap, backflushing disc, valve stem, guide sleeve, valve cover, spring and sealing assembly;The utility model is provided with sealing assembly, sealing ring is compressed by screwing connecting plate to drive sealing ring to deform inwards, to form sealing with backflushing disc outer wall, by the sealing ring of deformation protrusion, there is the force of pushing inwards, in actual use process, after being repeatedly abraded by backflushing disc, it will not appear the situation that deformation leads to no longer abutting with backflushing disc, to ensure the sealing property between backflushing disc and guide sleeve, avoid the situation of leakage.

[0004] The scheme is found in actual use, the spring position of traditional spring type safety valve is usually fixed and not adjustable in the process of design and use.This means that once the safety valve is manufactured and installed into a specific equipment or system, its adaptable working pressure range is relatively fixed.However, in actual industrial applications, different equipment and systems often face diversified working pressure demands.For example, in some chemical production devices, different reaction processes and process conditions may require different working pressures;Again, in the boiler system of energy field, with the change of working condition, the steam pressure will also fluctuate within a certain range.When the working pressure of equipment or system changes, if the spring position of safety valve cannot be adjusted accordingly, problems may occur.If the working pressure exceeds the set value of safety valve, the safety valve with fixed spring position may not open in time, leading to high internal pressure of equipment, and further causing explosion, leakage and other serious safety accidents;On the contrary, if the working pressure is lower than the set value of safety valve, the safety valve may open frequently, not only affecting the normal operation efficiency of equipment, but also possibly causing unnecessary energy waste and medium loss.

[0005] Therefore, based on the above search and combined with existing technology, we propose a leakproof explosion-proof self-adapting pressure safety valve. UTILITY MODEL CONTENT

[0006] The utility model discloses a purpose lies in providing a kind of leakproof explosion-proof self-adapting pressure safety valve to solve the problems presented in the above background art.

[0007] To achieve the above object, the utility model provides the following technical scheme:

[0008] A kind of leakproof explosion-proof self-adapting pressure safety valve, including valve body, further including valve cover, valve seat, valve flap, backflush disc, valve rod, guide sleeve, lower spring seat, spring, upper spring seat, adjusting assembly, discharge pipe, fire resistance component, connecting pipe;

[0009] The top of the valve body is fixedly installed with valve cover, the inside of the valve body is fixedly installed with valve seat and guide sleeve, and the valve seat is located directly below the guide sleeve, the inside of the guide sleeve is movably installed with backflush disc, the lower end of the backflush disc is installed with valve flap, and the lower end surface of the valve flap is matched with the upper end surface of the valve seat, the top of the backflush disc is butted with valve rod, the outside of the valve rod is sleeved with lower spring seat and upper spring seat, the top of the lower spring seat and the bottom of the upper spring seat are installed with spring, the top of the valve cover is provided with adjusting assembly that can adjust the distance between lower spring seat and upper spring seat, the side of the valve body is fixedly installed with discharge pipe, the side of the discharge pipe is connected with fire resistance component through flange, the side of the fire resistance component is connected with connecting pipe through flange.

[0010] Further, the adjusting assembly includes adjusting sleeve, the inside of the top of the valve cover is threadedly connected with adjusting sleeve, and the lower end surface of the adjusting sleeve is matched with the upper end surface of the upper spring seat.

[0011] Further, the fire resistance component includes air inlet pipe, the side of the discharge pipe is connected with air inlet pipe through flange, the side of the air inlet pipe is fixedly installed with fixing frame, the side, away from the air inlet pipe, of the fixing frame is fixedly installed with air outlet pipe, the inside of the fixing frame is fixedly installed with fire resistance net, the fire resistance net is provided with multiple groups side by side, and the fire resistance net is made of stainless steel material.

[0012] Further, sealing assembly one is arranged between the valve body and the valve cover, the sealing assembly one includes connecting groove, the bottom of the valve cover is provided with connecting groove, the top of the valve body is welded with connecting plate, and the inner wall of the connecting groove is bonded with sealing gasket.

[0013] Further, sealing assembly two is arranged between the discharge pipe and the air inlet pipe and between the air outlet pipe and the connecting pipe, the sealing assembly two includes placing groove, the side of the discharge pipe, the air inlet pipe, the air outlet pipe and the connecting pipe is all provided with placing groove, and the inside of the placing groove is provided with sealing ring.

[0014] Further, the valve body and the valve cover are all made of stainless steel material.

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] 1, the utility model discloses the clever use of adjusting assembly, can efficiently and conveniently the applicable pressure of safety valve is accurately adjusted. Specifically, by rotating the adjusting sleeve, the adjusting sleeve can realize flexible up and down displacement in the vertical direction. When the adjusting sleeve moves, the upper spring seat abutting against it will be driven to move up and down synchronously, and then the distance between the upper spring seat and the lower spring seat is accurately changed. At the same time, the spring force of the spring will also be enhanced or weakened accordingly according to the above adjustment, thereby perfectly adapting to the required safety valve applicable pressure requirement under various different working conditions.

[0017] 2, the utility model discloses the synergistic cooperation of sealing assembly one and sealing assembly two, the sealing performance of the safety valve is enhanced significantly. In the process of transporting gas, this design effectively prevents the possibility of gas leakage from the connecting part of the valve body and the valve cover and the pipeline connection, thereby greatly improving the overall safety of the safety valve, and providing solid and reliable guarantee for the stable operation of the related system. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the front view schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is the cross section structure schematic diagram of the overall structure of the utility model;

[0020] Figure 3 It is the utility model Figure 2 The enlarged view of A;

[0021] Figure 4 It is the utility model Figure 2 The enlarged view of B;

[0022] Figure 5 It is the utility model Figure 2 The enlarged view of C.

[0023] In the drawing: 1, valve body;2, valve cover;3, valve seat;4, valve flap;5, backflush disc;6, valve stem;7, guide sleeve;8, lower spring seat;9, spring;10, upper spring seat;11, adjusting assembly;1101, adjusting sleeve;1102, adjusting screw;1103, valve cap;12, discharge pipe;13, fire resistance assembly;1301, air inlet pipe;1302, air outlet pipe;1303, fixing frame;1304, fire resistance net;14, connecting pipe;15, sealing assembly one;1501, connecting groove;1502, connecting plate;1503, sealing gasket;16, sealing assembly two;1601, placing groove;1602, sealing ring. DETAILED DESCRIPTION

[0024] The utility model makes further explanation as follows by combining with specific embodiments, however, people skilled in the art should understand that the structure of the utility model certainly exceeds these limited embodiments, and for some equivalent alternative schemes or common means, the detailed description is not made in the present article, but still belongs to the protection scope of the present application.

[0025] Figures 1-5 It is the best embodiment of the utility model, and the following will be described in detail with reference to the accompanying drawings Figure 1 ~ attached Figure 5 The utility model makes further explanation as follows by combining with specific embodiments, however, people skilled in the art should understand that the structure of the utility model certainly exceeds these limited embodiments, and for some equivalent alternative schemes or common means, the detailed description is not made in the present article, but still belongs to the protection scope of the present application.

[0026] A kind of anti-leakage explosion-proof self-adaptive pressure safety valve, including valve body 1, still including valve cover 2, valve seat 3, valve flap 4, backflush disc 5, valve rod 6, guide sleeve 7, lower spring seat 8, spring 9, upper spring seat 10, adjusting assembly 11, discharge pipe 12, fire resistance component 13, connecting pipe 14, sealing assembly one 15 and sealing assembly two 16;

[0027] The top of valve body 1 is fixedly installed with valve cover 2, the inside of valve body 1 is fixedly installed with valve seat 3 and guide sleeve 7, and valve seat 3 is located directly below guide sleeve 7, the inside of guide sleeve 7 movably installs backflush disc 5, the lower end of backflush disc 5 is installed with valve flap 4, and the lower end surface of valve flap 4 is in contact with the upper end surface of valve seat 3, the top of backflush disc 5 is in contact with valve rod 6, the outside of valve rod 6 is provided with lower spring seat 8 and upper spring seat 10, the top of lower spring seat 8 and the bottom of upper spring seat 10 are installed with spring 9, the top of valve cover 2 is provided with adjusting assembly 11, which can adjust the distance between lower spring seat 8 and upper spring seat 10, the side of valve body 1 is fixedly installed with discharge pipe 12, the side of discharge pipe 12 is connected with fire resistance component 13 through flange, and the side of fire resistance component 13 is connected with connecting pipe 14 through flange.

[0028] Specifically, adjusting assembly 11 includes adjusting sleeve 1101, the inside of the top of valve cover 2 is threadedly connected with adjusting sleeve 1101, the lower end surface of adjusting sleeve 1101 is in contact with the upper end surface of upper spring seat 10, more specifically, the outside of adjusting sleeve 1101 is threadedly connected with adjusting screw 1102, the outer wall of adjusting sleeve 1101 is provided with external thread, the inner wall of the top of valve cover 2 and the inner wall of adjusting screw 1102 are provided with internal thread, and the external thread of adjusting sleeve 1101 is matched with the internal thread of valve cover 2 and adjusting screw 1102, the outer wall of the top of valve cover 2 is threadedly connected with valve cap 1103, the outer wall of the top of valve cover 2 is provided with external thread, the inside of adjusting sleeve 1101 is provided with internal thread, and the external thread of adjusting sleeve 1101 is matched with the internal thread of adjusting sleeve 1101.

[0029] In this embodiment, when the safety valve pressure needs to be adjusted, the adjusting screw 1102 outside the adjusting sleeve 1101 is removed first. Then, the adjusting sleeve 1101 is rotated to move up and down. The movement of the adjusting sleeve 1101 drives the upper spring seat 10 in contact with it to move up and down, thereby adjusting the distance between the upper spring seat 10 and the lower spring seat 8. At the same time, the spring force of the spring 9 will also be increased or weakened to adapt to the required safety valve pressure under different conditions; when adjusted to the appropriate range, the adjusting screw 1102 is fixed outside the adjusting sleeve 1101 to fix the position of the adjusting sleeve 1101, and finally the valve cover 1103 is installed on the top of the valve cover 2, completing the adjustment work.

[0030] Specifically, the fire blocking assembly 13 includes an air inlet pipe 1301, and the side of the discharge pipe 12 is connected with the air inlet pipe 1301 through a flange. The air inlet pipe 1301 is fixedly installed with a fixed frame 1303 on the side thereof. The side away from the air inlet pipe 1301 of the fixed frame 1303 is fixedly installed with an air outlet pipe 1302. The fixed frame 1303 is fixedly installed with a fire blocking net 1304 inside. The fire blocking net 1304 is provided in multiple groups side by side. The fire blocking net 1304 is made of stainless steel.

[0031] In this embodiment, when the flame and hot gas enter the fire blocking assembly 13, the fire blocking net 1304 physically blocks the flame through the small mesh holes thereof. When the flame passes through the mesh holes, the energy of the flame is greatly weakened due to heat loss and airflow disturbance, and the flame cannot continue to spread. At the same time, the fire blocking net 1304 can also divide the flame into many small fire sources, which are difficult to recombine into a destructive flame after passing through the mesh holes.

[0032] Specifically, the valve body 1 and the valve cover 2 are provided with a sealing assembly 15. The sealing assembly 15 includes a connecting groove 1501. The bottom of the valve cover 2 is provided with the connecting groove 1501. The top of the valve body 1 is welded with a connecting plate 1502. The connecting groove 1501 is matched with the connecting plate 1502. The inner wall of the connecting groove 1501 is bonded with a sealing gasket 1503. The sealing gasket 1503 is made of fluororubber material.

[0033] In this embodiment, in the installation operation of the valve body 1 and the valve cover 2, the connecting plate 1502 provided with the valve body 1 needs to be inserted into the corresponding connecting groove 1501 of the valve cover 2. This operation step has important positioning effect, which can ensure that the valve body 1 and the valve cover 2 are more accurately aligned, thereby providing convenient conditions for the subsequent staff to fix the bolts. At the same time, under the action of the sealing gasket 1503 made of fluororubber material, it can effectively prevent the leakage of the transported gas from the connecting part of the valve body 1 and the valve cover 2, thereby playing a reliable explosion-proof role.

[0034] Specifically, the discharge pipe 12 and the air inlet pipe 1301 and the air outlet pipe 1302 and the connecting pipe 14 are provided with sealing assembly two 16, the sealing assembly two 16 includes a placing groove 1601, the side of the discharge pipe 12, the air inlet pipe 1301, the air outlet pipe 1302 and the connecting pipe 14 is provided with a placing groove 1601, the inside of the placing groove 1601 is provided with a sealing ring 1602, the sealing ring 1602 is made of fluorine rubber material.

[0035] In the installation process of the connecting pipeline in the embodiment, the sealing ring 1602 is first placed in the placing groove 1601 of the pipeline. When the pipelines are connected through the flanges and gradually close to each other, the sealing ring 1602 is extruded and deformed under the interaction of the pipelines. This ingenious design enables the sealing ring 1602 to closely fit the pipeline connection part, effectively blocks the leakage of gas, and thus ensures the sealing and safety of the pipeline connection.

[0036] Specifically, the valve body 1 and the valve cover 2 are made of stainless steel material.

[0037] In some strong corrosion environments in the chemical industry, the valve body 1 and the valve cover 2 made of stainless steel material can resist the corrosion of acid, alkali and other corrosive media, and prolong the service life of the safety valve.

[0038] The working principle and use process of the utility model: when the valve body 1 and the valve cover 2 need to be installed, the connecting plate 1502 of the valve body 1 is inserted into the corresponding connecting groove 1501 on the valve cover 2, which plays a positioning role and provides convenient conditions for the subsequent staff to operate the bolt fixation. At the same time, under the action of the sealing gasket 1503 made of fluorine rubber material, the leakage phenomenon of the transport gas from the connecting part of the valve body 1 and the valve cover 2 can be effectively prevented; when the pipeline needs to be connected, the sealing ring 1602 is placed in the placing groove 1601 of the pipeline. When the pipeline is connected through the flange and gradually approaches, the sealing ring 1602 will be extruded and deformed under the interaction of the pipeline, thereby starting the sealing effect. In the process of transporting gas, this design effectively eliminates the possibility of leakage of gas from the connecting part of the valve body 1 and the valve cover 2 and the pipeline connection, thereby greatly improving the overall safety of the safety valve and providing a solid and reliable guarantee for the stable operation of the related system; when the safety valve applicable pressure needs to be adjusted, the adjusting screw 1102 outside the adjusting sleeve 1101 is removed. Then the adjusting sleeve 1101 can be rotated to move up and down. The movement of the adjusting sleeve 1101 will drive the upper spring seat 10 in contact with it to move up and down, thereby adjusting the distance between the upper spring seat 10 and the lower spring seat 8. At the same time, the spring force of the spring 9 will also be increased or weakened to adapt to the required safety valve applicable pressure under different conditions; when the appropriate range is adjusted, the adjusting screw 1102 is fixed outside the adjusting sleeve 1101 to fix the position of the adjusting sleeve 1101, and finally the valve cap 1103 is installed on the top of the valve cover 2, which completes the adjustment work. The spring force of the spring 9 will also be increased or weakened according to the above adjustment, thereby perfectly adapting to the safety valve applicable pressure requirements under various different working conditions.

[0039] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this. Any skilled person in the technical field according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model can make equivalent replacement or change, which should be covered in the protection scope of the utility model.

Claims

1. A leak-proof and explosion-proof adaptive pressure safety valve, comprising a valve body (1), characterized in that: It also includes valve cover (2), valve seat (3), valve disc (4), backflush disc (5), valve stem (6), guide sleeve (7), lower spring seat (8), spring (9), upper spring seat (10), adjustment assembly (11), discharge pipe (12), flame arrestor assembly (13), and connecting pipe (14); A valve cover (2) is fixedly installed on the top of the valve body (1). A valve seat (3) and a guide sleeve (7) are fixedly installed inside the valve body (1). The valve seat (3) is located directly below the guide sleeve (7). A backflush disc (5) is movably installed inside the guide sleeve (7). A valve disc (4) is installed at the lower end of the backflush disc (5). The lower end face of the valve disc (4) abuts against the upper end face of the valve seat (3). A valve stem (6) abuts against the top of the backflush disc (5). A valve rod (6) is sleeved on the outer side of the valve stem (6). There is a lower spring seat (8) and an upper spring seat (10). A spring (9) is installed on the top of the lower spring seat (8) and the bottom of the upper spring seat (10). An adjusting component (11) is provided on the top of the valve cover (2) to adjust the distance between the lower spring seat (8) and the upper spring seat (10). A discharge pipe (12) is fixedly installed on the side of the valve body (1). A flame arrestor component (13) is connected to the side of the discharge pipe (12) through a flange. A connecting pipe (14) is connected to the side of the flame arrestor component (13) through a flange.

2. The leak-proof and explosion-proof adaptive pressure safety valve according to claim 1, characterized in that: The adjustment assembly (11) includes an adjustment sleeve (1101), which is threaded onto the inner side of the top of the valve cover (2), and the lower end face of the adjustment sleeve (1101) abuts against the upper end face of the upper spring seat (10).

3. The leak-proof and explosion-proof adaptive pressure safety valve according to claim 1, characterized in that: The flame arrestor assembly (13) includes an air inlet pipe (1301). The side of the discharge pipe (12) is connected to the air inlet pipe (1301) via a flange. A fixing bracket (1303) is fixedly installed on the side of the air inlet pipe (1301). An air outlet pipe (1302) is fixedly installed on the side of the fixing bracket (1303) away from the air inlet pipe (1301). A flame arrestor mesh (1304) is fixedly installed inside the fixing bracket (1303). Multiple sets of flame arrestor meshes (1304) are arranged side by side. The flame arrestor meshes (1304) are made of stainless steel.

4. The leak-proof and explosion-proof adaptive pressure safety valve according to claim 1, characterized in that: A sealing assembly (15) is provided between the valve body (1) and the valve cover (2). The sealing assembly (15) includes a connecting groove (1501). The bottom of the valve cover (2) is provided with a connecting groove (1501). A connecting plate (1502) is welded to the top of the valve body (1). A sealing gasket (1503) is adhered to the inner wall of the connecting groove (1501).

5. The leak-proof and explosion-proof adaptive pressure safety valve according to claim 3, characterized in that: A second sealing component (16) is provided between the discharge pipe (12) and the air inlet pipe (1301), and between the air outlet pipe (1302) and the connecting pipe (14). The second sealing component (16) includes a placement groove (1601). The side of the discharge pipe (12), the air inlet pipe (1301), the air outlet pipe (1302) and the connecting pipe (14) are all provided with a placement groove (1601). A sealing ring (1602) is provided inside the placement groove (1601).

6. The leak-proof and explosion-proof adaptive pressure safety valve according to claim 1, characterized in that: Both the valve body (1) and the valve cover (2) are made of stainless steel.

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