A valve with an adjustable pressure relief structure

Abstract

This invention discloses a valve with an adjustable pressure relief structure, relating to the field of pressure relief valve technology. It includes a valve body, a valve cavity for the flow of medium through the valve body, a valve disc for relieving pressure exceeding a set pressure, and a pressure relief spring for opening the valve disc. It also includes a pressure regulating mechanism for adjusting the valve disc opening pressure and a pressure relief reset mechanism for facilitating valve disc reset after opening. This valve with an adjustable pressure relief structure allows for manual adjustment of the valve disc opening pressure during use. This increases the valve's applicability without altering the pressure relief spring within the valve body, thereby extending the valve body's lifespan.

Description

Technical Field

[0001] This invention relates to the field of pressure relief valve technology, and in particular to a valve with an adjustable pressure relief structure. Background Technology

[0002] Safety relief valves automatically open and close based on the system's working pressure and are typically installed on equipment or pipelines in closed systems to protect system safety. When the pressure inside the equipment or pipeline exceeds the valve's set pressure, it automatically opens to release pressure, ensuring that the pressure of the medium inside the equipment and pipeline remains below the set pressure, thus protecting the equipment and pipeline and preventing accidents. There are two main types of pressure relief valve structures: spring-loaded and lever-operated. Spring-loaded valves rely on the force of a spring to seal the valve disc against the valve seat. Lever-operated valves rely on the force of a lever and a counterweight. In a safety relief valve, the valve disc automatically opens when the upper limit of the safe pressure is reached, reducing the pressure and ensuring safety.

[0003] CN111609186A discloses a safety pressure relief valve. This device comprises a safety pressure relief valve body, an elbow housing, an external threaded connector, a hinge nut, a safety pressure relief valve handle, a vent connector, a vent, a safety pressure relief valve core rod, a safety pressure relief valve orifice, a valve core fixing block, a medium inlet, a medium outlet, a sealing piston, a hinge fastener, and a safety pressure relief spring. The safety pressure relief valve body is located above the elbow housing and has a safety pressure relief valve orifice. The spring and core rod are installed in the safety pressure relief valve orifice within the valve body and fixed by the valve core. A hinge fastener with a medium inlet is installed in the inner hole of the elbow housing's inlet end for fitting the hinge nut; the inner hole of the outlet end is the medium outlet, and an external threaded connector is provided externally. The safety pressure relief valve handle is located at the upper end of the safety pressure relief valve core rod, and the vent connector and vent are located on the side of the safety pressure relief valve body. This device features space-saving installation, simple structure, overpressure protection, convenient installation, high safety performance, and good heating effect.

[0004] However, the aforementioned device still uses a safety relief spring to control the valve opening. During use, a suitable safety relief valve needs to be selected based on the water pipe pressure. However, the actual water pressure in the pipe is not constant, which may lead to mismatches in the selection of the safety relief valve. This results in a limited application range for each valve body. Furthermore, if an incompatible valve body is selected, the valve opening pressure may be too close to the working pressure, leading to an excessively low sealing pressure. When the valve is subjected to vibration or fluctuations in the working medium, leakage can easily occur. Additionally, if the medium flowing through the pipeline changes, the valve body needs to be replaced accordingly; otherwise, unstable operation may occur. Summary of the Invention

[0005] The present invention addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. The present invention provides a valve with an adjustable pressure relief structure to solve the technical problem that existing pressure relief valves cannot adjust the pressure of the spring during use, resulting in the inability to adjust the pressure of the valve disc according to changes in the pressure in the water pipe.

[0006] The present invention adopts the following technical solution: a valve with an adjustable pressure relief structure, including a valve body, a valve cavity for medium to flow through the valve body, a valve disc for relieving pressure exceeding the set pressure, and a pressure relief spring for opening the valve disc, and further including a pressure regulating mechanism for regulating the valve disc opening pressure and a pressure relief reset mechanism for facilitating the reset of the valve disc after opening.

[0007] Furthermore, the pressure regulating mechanism includes an regulating component and a pressure changing component. The pressure changing component includes a mating sleeve, which is disposed on the top surface of the valve disc. A connecting plate is fitted outside the upper end of the mating sleeve, and the connecting plate is fixedly connected to the valve cavity. The connecting plate is slidably connected to the mating sleeve. A pressure relief spring is provided at the bottom of the connecting plate and the top of the valve disc, and the pressure relief spring is disposed outside the mating sleeve. An regulating sleeve is fitted inside the mating sleeve. A limit groove is formed on the inner surface of the regulating sleeve, and a limit block is provided in the limit groove. The limit block is fixedly connected to the inner surface of the mating sleeve. Multiple resistance blocks are disposed through the regulating sleeve.

[0008] Furthermore, the adjusting sleeve is hollow, and the wall of the adjusting sleeve has a cavity, and the interior of the adjusting sleeve has a threaded groove.

[0009] Furthermore, the outer surface of the resistance block is uneven, and the length of each resistance block is different, and the bottom surface of the resistance block is inclined.

[0010] Furthermore, the adjusting assembly includes an adjusting rod disposed outside the valve cavity, a connecting rod disposed at the bottom of the adjusting rod, the connecting rod being disposed through the valve body, and a rotating threaded rod disposed at the bottom of the connecting rod, the rotating threaded rod being threadedly connected to the adjusting sleeve.

[0011] Furthermore, the pressure relief and reset mechanism includes a rotating sleeve, which is disposed in a cavity opened in the inner wall of the adjusting sleeve. A pressure relief block is disposed outside the rotating sleeve. A connecting gear is disposed outside the top of the rotating sleeve. A mating gear is disposed outside the connecting gear. A rotating groove is opened at the bottom of the mating gear. A connecting sleeve is rotatably disposed in the rotating groove. The connecting sleeve is fixedly connected to the connecting plate. A rotating screw is disposed inside the connecting sleeve, and the rotating screw is threadedly connected to the mating gear.

[0012] Furthermore, the thread angle of the rotating screw is greater than 60°, and the mating gear is meshed with the connecting gear.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: Firstly, by reducing the force on the pressure relief spring through the pressure regulating mechanism, the service life of the pressure relief spring is extended, avoiding elastic fatigue that could cause it to lose its function and fail to effectively relieve pressure in the pipeline. During use, the inner wall of the sleeve connected to the valve disc contacts the resistance block. At this time, the resistance block provides a certain resistance to the sleeve, so that when the pressure of the medium inside the pipeline acts on the valve disc, part of it acts on the pressure relief spring, while the remaining pressure acts on the resistance block through the connecting sleeve. The resistance block reduces the resistance on the pressure relief spring, and when the force on the pressure relief spring is reduced, its service life can be indirectly increased. Secondly, the valve opening pressure can be manually adjusted via the pressure regulating mechanism. This allows the valve to relieve pressure for different media without replacing the pressure relief spring, avoiding the need to replace the valve body due to insufficient understanding of pipeline pressure during procurement or pressure changes during use, thus ensuring normal pipeline operation. During use, the adjusting rod in the pressure regulating mechanism can be operated externally to adjust the valve pressure at any time, making it convenient and not affecting the valve's operation. Furthermore, when the valve is depressurized, it contacts a different number of resistance blocks. The more resistance blocks, the larger the contact area between the sleeve and the resistance blocks, resulting in greater resistance. This adjusts the movement resistance of the sleeve, and the change in sleeve movement resistance alters the valve opening pressure, thus achieving the effect of regulating the valve opening pressure. Thirdly, when the pressure relief and reset mechanism is in use, after the valve disc has finished depressurizing, the pressure relief spring resets. The resistance block does not provide additional resistance to the pressure relief spring, thus ensuring that the pressure relief spring can reset quickly and effectively. At the same time, the force on the pressure relief spring is reduced during operation, which further increases the service life of the pressure relief spring. In use, when the valve disc is opened, rotating the screw will eventually drive the rotating sleeve to rotate. The rotation of the rotating sleeve causes the pressure relief block that is in contact with the resistance block to be misaligned. When the pressure relief block and the resistance block are misaligned, they can no longer provide resistance to the resistance block. At this time, the resistance block resets under the action of the connecting spring. When the resistance block is no longer in contact with the mating sleeve, the pressure relief spring has no additional force, which facilitates the reset of the pressure relief spring. In summary, the valve allows for manual adjustment of the valve disc's opening pressure during use. This increases the valve's applicability without altering the pressure relief spring within the valve body, thereby extending the valve's lifespan. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the main cross-section of the present invention; Figure 3 This is a schematic diagram of the valve disc connection structure of the present invention; Figure 4 This is a schematic cross-sectional view of the mating sleeve structure of the present invention; Figure 5 This is a schematic diagram of the pressure regulating mechanism of the present invention; Figure 6 This is a schematic diagram of the gear connection structure of the present invention; Figure 7 This is a cross-sectional view of the pressure relief and reset mechanism of the present invention.

[0016] Figure label: 1. Valve body; 11. Valve cavity; 12. Valve disc; 13. Pressure relief spring; 2. Pressure regulating mechanism; 21. Adjusting rod; 22. Connecting rod; 23. Rotating threaded rod; 24. Resistance block; 25. Adjusting sleeve; 26. Limiting groove; 27. Connecting plate; 28. Limiting block; 29. ​​Matching sleeve; 3. Pressure relief reset mechanism; 31. Connecting gear; 32. Matching gear; 33. Connecting sleeve; 34. Rotating screw; 35. Pressure relief block; 36. Rotating sleeve; 37. Rotating groove. Detailed Implementation

[0017] The technical solution of the present invention will now be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0019] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] The following is combined with Figures 1 to 7 As shown, this embodiment of the invention provides a valve with an adjustable pressure relief structure, including a valve body 1, a valve cavity 11 for the medium to flow through the valve body 1, a valve disc 12 for relieving pressure exceeding the set pressure, and a pressure relief spring 13 for opening the valve disc 12. It also includes a pressure regulating mechanism 2 for adjusting the opening pressure of the valve disc 12 and a pressure relief reset mechanism 3 for facilitating the reset of the valve disc 12 after opening.

[0023] During operation, the valve can be manually adjusted to change the opening pressure of the valve disc 12. This increases the range of applications of the valve body 1 without changing the pressure relief spring 13 in the valve body 1, thereby increasing the applicability of the valve body 1. Furthermore, it can extend the service life of the pressure relief spring 13 during use, thus increasing the service life of the valve body 1.

[0024] Specifically, the pressure regulating mechanism 2 includes an regulating component and a pressure changing component. The pressure changing component includes a mating sleeve 29, which is disposed on the top surface of the valve disc 12. A connecting plate 27 is fitted onto the outer side of the upper end of the mating sleeve 29. The connecting plate 27 is fixedly connected to the valve cavity 11 and slidably connected to the mating sleeve 29. A pressure relief spring 13 is provided at the bottom of the connecting plate 27 and the top of the valve disc 12, and the pressure relief spring 13 is disposed outside the mating sleeve 29. An adjusting sleeve 25 is fitted inside the mating sleeve 29. A limiting groove 26 is formed on the inner surface of the adjusting sleeve 25. A limiting block 28 is provided in the limiting groove 26 and is fixedly connected to the inner surface of the mating sleeve 29. Multiple resistance blocks 24 are disposed through the adjusting sleeve 25.

[0025] Specifically, the adjusting sleeve 25 is hollow, and the wall of the adjusting sleeve 25 has a cavity, and the interior of the adjusting sleeve 25 has a threaded groove.

[0026] During operation, it facilitates the adjustment of the adjusting sleeve 25.

[0027] Specifically, the outer surface of the resistance block 24 is uneven, and the length of each resistance block 24 is different, and the bottom surface of the resistance block 24 is inclined.

[0028] During operation, the uneven design increases the resistance of the resistance block 24, thereby providing additional force to the valve disc 12. The inclined bottom surface of the resistance block 24 facilitates movement in conjunction with the sleeve 29.

[0029] Specifically, the adjustment assembly includes an adjustment rod 21, which is disposed outside the valve cavity 11. A connecting rod 22 is provided at the bottom of the adjustment rod 21, which is disposed through the valve body 1. A rotating threaded rod 23 is provided at the bottom of the connecting rod 22, and the rotating threaded rod 23 is threadedly connected to the adjustment sleeve 25.

[0030] Specifically, the pressure relief and reset mechanism 3 includes a rotating sleeve 36, which is disposed in a cavity opened in the inner wall of the adjusting sleeve 29. A pressure relief block 35 is disposed outside the rotating sleeve 36. A connecting gear 31 is disposed outside the top of the rotating sleeve 36. A mating gear 32 is disposed outside the connecting gear 31. A rotating groove 37 is opened at the bottom of the mating gear 32. A connecting sleeve 33 is rotatably disposed in the rotating groove 37. The connecting sleeve 33 is fixedly connected to the connecting plate 27. A rotating screw 34 is disposed inside the connecting sleeve 33, and the rotating screw 34 is threadedly connected to the mating gear 32.

[0031] During operation, after the valve disc 12 has finished depressurizing, the pressure relief spring 13 resets via the pressure relief and reset mechanism 3. The resistance block 24 does not provide additional resistance to the pressure relief spring 13, thus ensuring that the pressure relief spring 13 can reset quickly and effectively. At the same time, the force on the pressure relief spring 13 during operation is reduced, which further increases the service life of the pressure relief spring 13. During operation, when the valve disc 12 is opened, the rotating screw 34 will eventually drive the rotating sleeve 36 to rotate. The rotation of the rotating sleeve 36 causes the pressure relief block 35, which is in contact with the resistance block 24, to become misaligned with the resistance block 24. When the pressure relief block 35 is misaligned with the resistance block 24, it can no longer provide resistance to the resistance block 24. At this time, the resistance block 24 resets under the action of the connecting spring. When the resistance block 24 is no longer in contact with the mating sleeve 29, the pressure relief spring 13 has no additional force, thus facilitating the reset of the pressure relief spring 13.

[0032] Working principle: During use, first connect both ends of valve body 1 to the pipeline, then introduce the medium into the pipeline. During the medium introduction process, observe the actual pressure inside the pipeline using a pressure gauge. Then, adjust the opening pressure of valve disc 12 according to the actual pressure, ensuring a certain difference between valve disc 12 and the actual pressure. This prevents the difference from being too small, which could cause valve disc 12 to open unexpectedly when the medium fluctuates. Adjustment is made by first rotating the adjusting rod 21. Since the adjusting rod 21 is connected to the rotating threaded rod 23 via the connecting rod 22, rotating the adjusting rod 21 will simultaneously rotate the rotating threaded rod 23. Rod 23 is threadedly connected to adjusting sleeve 25. The bottom of adjusting sleeve 25 is connected to mating sleeve 29 via limiting block 28. This allows adjusting sleeve 25 to move when the threaded rod 23 rotates. After a certain number of rotations, adjusting sleeve 25 moves a certain amount, and resistance block 24 works synchronously with adjusting sleeve 25. As the medium flows and the internal pressure increases, valve disc 12 moves under the pressure. This movement of valve disc 12 drives mating sleeve 29 to move synchronously. When mating sleeve 29 moves, it abuts against resistance block 24, increasing the opening pressure of valve disc 12. Simultaneously, adjusting sleeve 25 moves further towards... The more the valve disc 12 contacts the resistance block 24 when it opens, the greater the opening pressure of the valve disc 12, thus achieving the function of regulating the opening pressure of the valve disc 12. When the valve disc 12 opens, water will flow, thereby relieving pressure on the pipeline. During the movement of the valve disc 12, it will drive the rotating screw 34 to move. Since the rotating screw 34 is threadedly connected to the mating gear 32, the mating gear 32 will rotate during the movement of the rotating screw 34. Since the mating gear 32 meshes with the connecting gear 31, the rotation of the mating gear 32 will drive the rotation of the connecting gear 31. The rotation of the connecting gear 31 will drive the rotation of the rotating sleeve 36, and the rotation of the rotating sleeve 36 will drive the pressure relief block. When the pressure relief block 35 rotates 35, its position changes. At this time, the pressure relief block 35 no longer abuts against the resistance block 24, and the resistance block 24 resets under the action of the connecting spring. At this time, the resistance block 24 no longer contacts the mating sleeve 29. After the pipeline is depressurized, the mating sleeve 29 resets under the action of the pressure relief spring 13, which facilitates the next depressurization. At the same time, there is no additional force during the reset process of the pressure relief spring 13, which can ensure the normal operation of the pressure relief spring 13. During use, the movement distance of the valve disc 12 is constant, but within the constant movement range, it can contact different numbers of resistance blocks 24, so that the resistance of the valve disc 12 will also change, thereby achieving the adjustment effect. In summary, the valve allows for manual adjustment of the opening pressure of the valve disc 12 during use. This increases the applicability of the valve body 1 without altering the pressure relief spring 13 within the valve body 1, and also extends the service life of the pressure relief spring 13, thereby increasing the overall service life of the valve body 1.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A valve with an adjustable pressure relief structure, comprising a valve body (1), a valve chamber (11) for medium to flow through the valve body (1), a valve disc (12) for relieving pressure exceeding a set pressure, and a pressure relief spring (13) for opening the valve disc (12), characterized in that; It also includes a pressure regulating mechanism (2) for regulating the opening pressure of the valve disc (12) and a pressure relief and reset mechanism (3) for facilitating the reset of the valve disc (12) after opening. The pressure regulating mechanism (2) includes an regulating component and a pressure changing component. The pressure changing component includes a mating sleeve (29), which is disposed on the top surface of the valve disc (12). A connecting plate (27) is sleeved on the upper part of the mating sleeve (29). The connecting plate (27) is fixedly connected to the valve cavity (11). The connecting plate (27) is slidably connected to the mating sleeve (29). A pressure relief spring (13) is provided at the bottom of the connecting plate (27) and the top of the valve disc (12). The pressure relief spring (13) is disposed outside the mating sleeve (29). An adjusting sleeve (25) is sleeved inside the mating sleeve (29). A limit groove (26) is opened on the inner surface of the adjusting sleeve (25). A limit block (28) is provided in the limit groove (26). The limit block (28) is fixedly connected to the inner surface of the mating sleeve (29). Multiple resistance blocks (24) are provided through the adjusting sleeve (25). The adjustment assembly includes an adjustment rod (21), which is located outside the valve cavity (11). A connecting rod (22) is provided at the bottom of the adjustment rod (21), which is inserted through the valve body (1). A rotating threaded rod (23) is provided at the bottom of the connecting rod (22), and the rotating threaded rod (23) is threadedly connected to the adjustment sleeve (25).

2. The valve with an adjustable pressure relief structure according to claim 1, characterized in that; The adjusting sleeve (25) is hollow, and the inner wall of the adjusting sleeve (25) is provided with a cavity. The adjusting sleeve (25) has a threaded groove inside.

3. The valve with an adjustable pressure relief structure according to claim 1, wherein; The outer surface of the resistance block (24) is uneven, and the length of each resistance block (24) is different. The bottom surface of the resistance block (24) is inclined. The resistance block (24) and the adjusting sleeve (25) are connected by a connecting spring.

4. A valve with an adjustable pressure relief structure according to claim 1, characterized in that; The pressure relief and reset mechanism (3) includes a rotating sleeve (36), which is disposed in a cavity opened in the inner wall of the adjusting sleeve (25). A pressure relief block (35) is provided outside the rotating sleeve (36). A connecting gear (31) is provided outside the top of the rotating sleeve (36). A mating gear (32) is provided outside the connecting gear (31). A rotating groove (37) is opened at the bottom of the mating gear (32). A connecting sleeve (33) is rotatably disposed in the rotating groove (37). The connecting sleeve (33) is fixedly connected to the connecting plate (27). A rotating screw (34) is provided inside the connecting sleeve (33), and the rotating screw (34) is threadedly connected to the mating gear (32).

5. The valve with an adjustable pressure relief structure according to claim 4, characterized in that; The rotating screw (34) has a thread angle greater than 60°, and the mating gear (32) meshes with the connecting gear (31).

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