Self-pressure-relief safety valve

Abstract

The utility model discloses a self pressure relief safety valve, which particularly relates to the technical field of safety valves, and comprises a valve body, a valve seat is fixedly arranged in the valve body, a water inlet is arranged in the valve seat, an adjusting mechanism is arranged in the valve body, the adjusting mechanism comprises a guide sleeve fixedly arranged in the valve body, and a guide groove is arranged on the surface of the guide sleeve. A guide ring is slidably arranged in the guide groove, a valve element is fixedly arranged in the guide ring, a valve rod is fixedly arranged at the top of the valve element, the valve rod is sleeved with a threaded adjusting pipe, an adjusting ring is rotatably arranged at one end of the threaded adjusting pipe, and a spring is fixedly arranged at the bottom of the adjusting ring. The pressure of the spring can be flexibly changed so as to accurately set the opening pressure, different working condition requirements can be met, stable and accurate movement of the valve element is guaranteed through the guide sleeve, the guide ring and other components, reliable opening and medium releasing during overpressure are achieved, and safety and stability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of safety valve more specifically, the utility model relates to self pressure relief safety valve. BACKGROUND

[0002] Safety valve is the closing piece under the action of external force and is in the normally closed state, when the medium pressure in the equipment or pipeline rises more than the specified value, the special valve is prevented that the medium pressure in the pipeline or equipment exceeds the specified value through the medium discharge to the system outside, the closing piece of traditional safety valve is closed action through the spring elasticity;

[0003] But the automatic pressure relief safety valve does not set manual pressure relief function and sets up the pressure relief pressure inconveniently, therefore, its use is more inconvenient.

[0004] Through the search, the patent with the authorized announcement number CN219388714U discloses an automatic pressure relief safety valve, in the structure, under the action of spring elasticity, the valve stem is pushed to make the valve core block the water inlet end, when the pressure of the water inlet end is too large, the pressure of the water inlet end overcomes the spring elasticity and pushes the valve core to move up, makes the water flow of the water inlet end to the water outlet end b flow and completes pressure relief, when the pressure after pressure relief is less than the spring elasticity, the spring pushes the valve stem and makes the valve core block the water inlet end, when needing manual pressure relief, the handle is pulled up, the convex column on the handle is supported on the other end of the push rod and pushes the other end of the push rod to swing up, the push rod pushes the lock nut and drives the valve stem to move up, thereby completing pressure relief, has the advantages that manual pressure relief operation is simple and labor-saving. By rotating the adjusting seat, the compression amount of the spring is adjusted, so that the pressure relief pressure is adjusted, and the advantages of convenient adjustment, simple and reliable structure are achieved.

[0005] But the structure in actual use, although the valve stem in the device is convenient for manual or automatic adjustment, since the movement of the valve stem and the valve core needs the help of the spring elasticity, but the position of the spring is fixed, so that the compression amount of the spring cannot be adjusted, only one kind of working condition demand can be adapted, leading to low universality. UTILITY MODEL CONTENTS

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides a self pressure relief safety valve to solve the problems in the above background art.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] The self pressure relief safety valve, including the valve body, the inside of the valve body is fixedly provided with the valve seat, the inside of the valve seat is provided with the water inlet, the inside of the valve body is provided with the adjusting mechanism;

[0009] The adjusting mechanism comprises a guide sleeve fixedly arranged in the valve body, a guide groove is formed in the surface of the guide sleeve, a guide ring is slidably arranged in the guide groove, a valve core is fixedly arranged in the guide ring, a valve rod is fixedly arranged on the top of the valve core, a threaded adjusting pipe is sleeved on the outer portion of the valve rod, an adjusting ring is rotatably arranged at one end of the threaded adjusting pipe, a spring is fixedly arranged on the bottom of the adjusting ring, and the valve rod extends to the outside of the valve body in sequence through the guide sleeve and the valve body and is in sliding connection with the inner wall of the valve body.

[0010] By adopting the above technical scheme, the spring pressure can be flexibly changed to accurately set the opening pressure, different working conditions can be adapted, the guide sleeve and the guide ring ensure smooth and accurate movement of the valve core, the medium can be reliably discharged when the pressure is too high, and the safety and stability are improved.

[0011] As a further description of the above technical scheme, the outer portion of the adjusting ring is in sliding connection with the inner wall of the valve body, the inner wall of the adjusting ring is in sliding connection with the valve rod, the surface of the threaded adjusting pipe is in threaded connection with the inner wall of the valve body, one end of the spring is connected with the top of the guide sleeve, the valve seat is clamped with the valve core, a limiting groove is formed in the surface of the guide ring, and the limiting groove is inserted into the surface of the valve body.

[0012] By adopting the above technical scheme, the adjusting action is more stable, the spring pressure can be accurately controlled to set the opening pressure, the valve seat is clamped with the valve core to ensure sealing, the limiting groove of the guide ring is inserted into the valve body to cooperate with the guide sleeve to ensure stable and accurate movement of the valve core, the overall safety valve performance is improved, and the overpressure protection and sealing reliability are enhanced.

[0013] As a further description of the above technical scheme, a sealing ring is fixedly arranged on the bottom of the guide ring, a sealing ring is fixedly arranged on the surface of the valve body, a sealing sleeve is fixedly arranged on the bottom of the valve core, a threaded ring is fixedly arranged on the top of the valve body, a bonnet is in threaded connection with the surface of the threaded ring, and a water outlet pipe is communicatively arranged on one side of the valve body.

[0014] By adopting the above technical scheme, the overall sealing property of the device is enhanced, the medium leakage is prevented, and the threaded ring is in threaded connection with the bonnet to facilitate installation and maintenance.

[0015] The technical effects and advantages of the utility model are as follows:

[0016] 1. By setting the adjusting mechanism, compared with the prior art, by rotating the threaded adjusting pipe according to the corresponding direction, with the reasonable connection and cooperation between the adjusting ring and each part, the spring pressure adjustment can be smoothly realized, the opening pressure setting adjustment is completed, the safety valve can easily adapt to the differentiated pressure requirements of various equipment or pipeline systems in different working environments, without developing a large number of safety valve products with different opening pressure specifications for various subtle pressure differences, the production process is simplified, the production cost and inventory management difficulty are reduced, and the adaptability is greatly improved, and manual pressure relief is facilitated;

[0017] 2. By setting the valve core, the sealing sleeve, the valve seat, the guide ring and the spring, compared with the prior art, the sealing sleeve at the bottom of the valve core is closely attached to the valve seat, cooperates with the sealing ring at the bottom of the guide ring and the sealing ring on the surface of the valve body to seal the gaps, effectively prevents the medium from leaking to the outside environment, and as the medium pressure rises, once the opening pressure set by the spring force is exceeded, the valve core will be smoothly opened under the action of the medium thrust, ensuring the smoothness and reliability of the safety valve opening operation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall structure schematic diagram of the utility model.

[0019] Figure 2 It is the overall split structure schematic diagram of the utility model.

[0020] Figure 3 It is the adjusting mechanism structure schematic diagram of the utility model.

[0021] Figure 4 It is the front view cross section structure schematic diagram of the utility model.

[0022] Figure 5 It is the overall working state structure schematic diagram of the utility model.

[0023] The figure mark is: 1, valve body;2, valve seat;3, water inlet;4, guide sleeve;5, guide groove;6, guide ring;7, valve core;8, valve rod;9, threaded adjusting pipe;10, adjusting ring;11, spring;12, limiting groove;13, sealing ring;14, sealing ring;15, sealing sleeve;16, threaded ring;17, valve cap;18, water outlet pipe. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] The embodiment of the present application discloses a self-pressure relief safety valve as shown in Figures 1-5 The self-pressure relief safety valve comprises a valve body 1, a valve seat 2 fixedly arranged in the valve body 1, a water inlet 3 arranged in the valve seat 2, and an adjusting mechanism arranged in the valve body 1.

[0026] The adjusting mechanism comprises a guide sleeve 4 fixedly arranged in the valve body 1, a guide groove 5 arranged on the surface of the guide sleeve 4, a guide ring 6 slidably arranged in the guide groove 5, a valve core 7 fixedly arranged in the guide ring 6, a valve rod 8 fixedly arranged on the top of the valve core 7, a threaded adjusting pipe 9 sleeved on the outer portion of the valve rod 8, an adjusting ring 10 rotatably arranged at one end of the threaded adjusting pipe 9, a spring 11 fixedly arranged on the bottom of the adjusting ring 10, and one end of the valve rod 8 sequentially penetrating the guide sleeve 4 and the valve body 1 and extending to the outside of the valve body 1, and the surface of the valve rod 8 being in sliding connection with the inner wall of the valve body 1. When the pressure of the spring 11 needs to be adjusted, the valve cap 17 is first rotated in the forward direction, the valve cap 17 is removed from the threaded ring 16 fixedly arranged on the top of the valve body 1, the outer surface of the threaded adjusting pipe 9 is in threaded connection with the inner wall of the valve body 1, when the threaded adjusting pipe 9 is rotated in the clockwise direction, the threaded adjusting pipe 9 drives the adjusting ring 10 to axially move towards the valve core 7, the adjusting ring 10 extrudes the spring 11, and the compression amount of the spring 11 is increased by 5, since the elastic force of the spring 11 is proportional to the compression amount, the compression amount increasing means that the elastic force of the spring 11 applied to the valve core 7 also increases accordingly.

[0027] Conversely, when the threaded adjusting pipe 9 is rotated in the counterclockwise direction, the threaded adjusting pipe 9 drives the adjusting ring 10 to move away from the valve core 7, the spring 11 is extruded, the compression amount of the spring 11 is reduced, the adjusting ring 10 can move along with the axial movement of the threaded adjusting pipe 9 and can keep the relative stable guiding and supporting effect during the movement, the whole adjusting action is stable and smooth, and the pressure of the spring 11 is conveniently adjusted, so that the opening pressure of the device is flexibly set, the device is better adapted to different working environments and equipment operation requirements, and the whole system is safely and stably operated in a reasonable pressure range.

[0028] Referring to Figures 2-3The outer part of the adjusting ring 10 is in sliding connection with the inner wall of the valve body 1, the inner wall of the adjusting ring 10 is in sliding connection with the valve rod 8, the surface of the threaded adjusting pipe 9 is in threaded connection with the inner wall of the valve body 1, one end of the spring 11 is connected with the top of the guide sleeve 4, the valve seat 2 is clamped with the valve core 7, the surface of the guide ring 6 is provided with a limiting groove 12, the limiting groove 12 is inserted with the surface of the valve body 1, when the pressure in the external equipment is in the normal working pressure range, the whole device is in the closed state, wherein the sealing sleeve 15 at the bottom of the valve core 7 is tightly attached with the valve seat 2, forming the first sealing line, preventing the medium from flowing upwards from the water inlet 3 through the gap between the valve core 7 and the valve seat 2, and at this time, the sealing ring 13 fixed at the bottom of the guide ring 6 is in close contact with the sealing ring 14 fixed on the surface of the valve body 1, sealing the gap between the guide ring 6 and the valve body 1, preventing the medium from leaking from the side, further ensuring the sealing of the overall structure of the valve body 1, and ensuring that the medium does not seep to the outside environment under normal pressure.

[0029] Referring to Figures 4-5 The bottom of the guide ring 6 is fixedly provided with a sealing ring 13, the surface of the valve body 1 is fixedly provided with a sealing ring 14, the bottom of the valve core 7 is fixedly provided with a sealing sleeve 15, the top of the valve body 1 is fixedly provided with a threaded ring 16, the surface of the threaded ring 16 is in threaded connection with a valve cap 17, and one side of the valve body 1 is in communication with a water outlet pipe 18, when the pressure in the equipment is increased and exceeds the normal working pressure range, as the medium pressure increases, the force acting on the bottom of the valve core 7 gradually increases, when the force exceeds the elastic force exerted by the spring 11 on the valve core 7, the balance of the force is broken, the valve core 7 is pushed upwards by the medium, and since the top of the valve core 7 is connected with the valve rod 8, the upward movement of the valve core 7 will drive the valve rod 8 to move upwards synchronously, extruding the spring 11 to deform, and the valve rod 8 is in sliding connection with the inner wall of the valve body 1, which can smoothly move axially, at the same time, the guide ring 6 will slide upwards along the guide groove 5 formed on the surface of the guide sleeve 4, guiding the stable movement of the valve core 7 in the vertical direction, preventing it from deviating, and ensuring that the safety valve can be smoothly opened;

[0030] When the valve core 7 moves upward and separates from the valve seat 2, the water inlet 3 and the channel in the valve body 1 are connected, and the medium in the external equipment can enter the valve body 1 through the water inlet 3, and then is discharged to the safety area outside through the water outlet pipe 18 on one side of the valve body 1, so that the pressure in the external equipment begins to decrease; with the discharge of the medium, the pressure in the external equipment gradually decreases; when the pressure decreases to the reset pressure of the valve body 1, the device is automatically closed, and returns to the normal working state; after the pressure decreases, the force of the medium acting on the bottom of the valve core 7 also decreases; when the force is smaller than the elastic force of the spring 11, the spring 11 starts to work and exerts a downward thrust on the valve core 7, so as to push the valve core 7 to move downward and accurately fall on the valve seat 2; the sealing sleeve 15 at the bottom of the valve core 7 is tightly attached to the valve seat 2 again, so as to re-form the seal and cut off the discharge channel of the medium.

[0031] The working principle of the utility model is as follows:

[0032] The utility model discloses a self pressure relief safety valve, when the pressure in the external equipment is in the normal working pressure range, the whole device is in the closed state, wherein the sealing sleeve 15 at the bottom of the valve core 7 is tightly attached to the valve seat 2, and the first sealing line is formed, so that the medium is prevented from flowing upward through the gap between the valve core 7 and the valve seat 2, and the sealing ring 13 fixed at the bottom of the guide ring 6 is tightly contacted with the sealing ring 14 fixed on the surface of the valve body 1, so that the gap between the guide ring 6 and the valve body 1 is sealed, and the medium is prevented from leaking from the side, and the sealing property of the whole structure of the valve body 1 is further ensured, so that the medium is prevented from seeping to the external environment under the normal pressure.

[0033] When the pressure in the equipment increases and exceeds the normal working pressure range, with the increase of the medium pressure, the force of the medium acting on the bottom of the valve core 7 gradually increases, when the force exceeds the elastic force of the spring 11 exerted on the valve core 7, the balance of force is broken, the valve core 7 is pushed upward and moves upward, since the top of the valve core 7 is connected with the valve rod 8, the valve core 7 moves upward and drives the valve rod 8 to move upward synchronously, so as to extrude the spring 11 to deform, and the valve rod 8 and the inner wall of the valve body 1 are in sliding connection, so that the valve rod 8 can move axially smoothly, at the same time, the guide ring 6 slides upward along the guide groove 5 formed on the surface of the guide sleeve 4, so as to guide the valve core 7 to move stably in the vertical direction and prevent the valve core 7 from deviating, so that the safety valve can be opened smoothly.

[0034] When the valve core 7 moves upward and leaves the valve seat 2, the water inlet 3 and the channel inside the valve body 1 are connected, and the medium in the external equipment can enter the valve body 1 through the water inlet 3, and then be discharged to the safety area outside through the water outlet pipe 18 on one side of the valve body 1, so that the pressure in the external equipment begins to decrease. With the discharge of the medium, the pressure in the external equipment gradually decreases. When the pressure decreases to the reset pressure of the valve body 1, the device is automatically closed, and returns to the normal working state. After the pressure decreases, the force of the medium acting on the bottom of the valve core 7 also decreases. When the force is smaller than the elastic force of the spring 11, the spring 11 begins to act, and exerts a downward thrust on the valve core 7, pushing the valve core 7 to move downward and accurately fall onto the valve seat 2. The sealing sleeve 15 at the bottom of the valve core 7 tightly abuts against the valve seat 2 again, re-forming the seal and cutting off the discharge channel of the medium.

[0035] When it is necessary to manually open the valve body 1, the valve cap 17 is rotated in the forward direction, the valve cap 17 is removed from the threaded ring 16 fixedly arranged on the top of the valve body 1, and then the valve rod 8 is pulled upward, so that the valve rod 8 moves upward and deforms the spring 11, and drives the valve core 7 to move away from the valve seat 2, thereby opening the channel.

[0036] When it is necessary to adjust the pressure of the spring 11, the valve cap 17 is rotated in the forward direction, the valve cap 17 is removed from the threaded ring 16 fixedly arranged on the top of the valve body 1, and the outer surface of the threaded adjusting pipe 9 is screwed with the inner wall of the valve body 1. When the threaded adjusting pipe 9 is rotated in the clockwise direction, the threaded adjusting pipe 9 drives the adjusting ring 10 to move axially towards the valve core 7, and drives the adjusting ring 10 to press the spring 11, so that the compression amount of the spring 11 increases by 5. Since the elastic force of the spring 11 is proportional to the compression amount, the increase in the compression amount means that the elastic force of the spring 11 applied to the valve core 7 also increases accordingly.

[0037] Conversely, when the threaded adjusting pipe 9 is rotated in the counterclockwise direction, the threaded adjusting pipe 9 drives the adjusting ring 10 to move away from the valve core 7, the spring 11 is less pressed, and the compression amount of the spring 11 decreases. The adjusting ring 10 can move axially with the threaded adjusting pipe 9, and can also maintain a relatively stable guiding and supporting effect during the movement, so as to ensure that the entire adjusting operation is smooth and smooth, and the pressure of the spring 11 is conveniently adjusted, so that the opening pressure of the device is flexibly set, and the device is better adapted to different working environments and equipment operation requirements, and the entire system is safely and stably operated in a reasonable pressure range.

[0038] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. Self-relieving safety valve comprising a valve body (1), characterized in that: The inside of the valve body (1) is fixedly provided with a valve seat (2), the inside of the valve seat (2) is provided with a water inlet (3), and the inside of the valve body (1) is provided with an adjusting mechanism. The adjusting mechanism comprises a guide sleeve (4) fixedly arranged in the inside of the valve body (1), the surface of the guide sleeve (4) is provided with a guide groove (5), the inside of the guide groove (5) is slidably provided with a guide ring (6), the inside of the guide ring (6) is fixedly provided with a valve core (7), the top of the valve core (7) is fixedly provided with a valve rod (8), the outside of the valve rod (8) is sleeved with a threaded adjusting pipe (9), one end of the threaded adjusting pipe (9) is rotatably provided with an adjusting ring (10), and the bottom of the adjusting ring (10) is fixedly provided with a spring (11).

2. The self-relieving safety valve according to claim 1, characterized in that: One end of the valve rod (8) penetrates the guide sleeve (4) and the valve body (1) in sequence and extends outwardly from the valve body (1), and the surface of the valve rod (8) is slidably connected with the inner wall of the valve body (1).

3. The self-relieving safety valve of claim 1, wherein: The outside of the adjusting ring (10) is slidably connected with the inner wall of the valve body (1), the inner wall of the adjusting ring (10) is slidably connected with the valve rod (8), the surface of the threaded adjusting pipe (9) is threadedly connected with the inner wall of the valve body (1), and one end of the spring (11) is connected with the top of the guide sleeve (4).

4. The self-relieving safety valve of claim 1, wherein: The valve seat (2) is clamped with the valve core (7), the surface of the guide ring (6) is provided with a limiting groove (12), and the limiting groove (12) is inserted with the surface of the valve body (1).

5. The self-relieving safety valve of claim 1, wherein: The bottom of the guide ring (6) is fixedly provided with a sealing ring (13), the surface of the valve body (1) is fixedly provided with a sealing ring (14), and the bottom of the valve core (7) is fixedly provided with a sealing sleeve (15).

6. The self-relieving safety valve of claim 1, wherein: The top of the valve body (1) is fixedly provided with a threaded ring (16), the surface of the threaded ring (16) is threadedly connected with a valve cap (17), and one side of the valve body (1) is communicated with a water outlet pipe (18).

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