Anti-loose pressure reducing valve assembly

Abstract

The utility model discloses a kind of anti-loosening pressure reducing valve assembly, including valve seat, solenoid valve assembly and check valve assembly, valve seat is equipped with pressure reduction passage, two through holes are equipped on valve seat, two through holes are all threadedly connected with transition pipe, limiting structure for limiting transition pipe axial rotation after two transition pipes respectively with respective corresponding through hole thread connection is provided on valve seat and sealing structure for being linked with limiting structure and sealing between the outer peripheral wall of transition pipe and the inner peripheral wall of through hole is used. The utility model solves the phenomenon that the connecting piece of the prior art is easily axially rotated or loosened under the scene working condition such as fluid pressure fluctuation, equipment vibration, etc. under the scene working condition such as fluid pressure fluctuation, equipment vibration, etc. under the scene working condition such as fluid pressure fluctuation, equipment vibration, etc. under the scene working condition such as fluid pressure fluctuation, equipment vibration, etc. under the scene working condition such as fluid pressure fluctuation, equipment vibration, etc. under the scene working condition such as fluid pressure fluctuation, equipment vibration, etc. under the scene working condition such as fluid pressure fluctuation, equipment vibration, etc. under the scene working condition such as fluid pressure fluctuation, equipment vibration, etc. under the scene working condition such as fluid pressure fluctuation, equipment vibration, etc. under the scene working condition such as fluid pressure fluctuation, equipment vibration, etc. under the scene working condition such as fluid pressure fluctuation, equipment vibration, etc. under the scene working condition such as fluid pressure fluctuation, equipment vibration, etc. under the scene working

Description

Technical Field

[0001] This utility model relates to the field of pressure reducing valve technology, specifically to an anti-loosening pressure reducing valve assembly. Background Technology

[0002] Pressure reducing valves, as key components for fluid pressure regulation, are widely used in industrial systems such as hydraulics, pneumatics, and water supply. They achieve pressure reduction control of high-pressure fluids through the cooperation of the internal valve core and valve seat, providing stable pressure fluid to downstream load equipment and ensuring the safe and efficient operation of the system. In existing technologies, the connection between pressure reducing valves and external pipelines (such as high-pressure fluid source pipelines and downstream load equipment pipelines) typically relies on threaded connections. This involves creating a through hole in the valve seat, and connecting it to the threaded hole using connectors or other fittings to connect the internal and external pipelines. This threaded connection method is widely used due to its simple structure and low cost.

[0003] However, in practical applications, significant defects have been found in this type of threaded connection structure: On the one hand, during the operation of the pressure reducing valve, the periodic fluctuations in fluid pressure and the continuous vibrations generated by equipment operation can easily cause axial rotation or loosening of the threaded connection, thereby disrupting the sealing relationship between the connection and the valve seat through hole and causing fluid leakage. This not only affects the stability of system pressure but may also lead to equipment failure due to leakage, and even pose safety hazards. On the other hand, in existing technologies, the anti-loosening structures (such as anti-loosening nuts and locking washers) used to prevent loosening of the connection and the sealing structures (such as O-rings and gaskets) used for sealing are mostly designed independently, lacking linkage and coordination. During installation, the anti-loosening and sealing steps must be operated separately, which is cumbersome and results in low disassembly and assembly efficiency of the pressure reducing valve; during maintenance, the anti-loosening and sealing status must also be checked separately, increasing the difficulty and cost of maintenance. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an anti-loosening pressure reducing valve assembly. This addresses the problems in existing technologies where the threaded connection parts of the pressure reducing valve fluid channel are prone to axial rotation or loosening under conditions such as fluid pressure fluctuations and equipment vibrations, leading to sealing failure between the connection parts and the valve seat. Furthermore, traditional connection parts and seals are mostly independently designed and lack linkage, resulting in low disassembly and assembly efficiency and high maintenance costs for pressure reducing valves.

[0005] To achieve the above objectives, this utility model provides an anti-loosening pressure reducing valve assembly, including a valve seat, a solenoid valve assembly and a check valve assembly for connection and cooperation with the valve seat. The valve seat has a hollow opening for a pressure reducing channel for the solenoid valve assembly and the check valve assembly to work together to achieve pressure regulation and fluid control. The outer wall of the valve seat has two through holes for communicating with the pressure reducing channel. Each of the two through holes is threaded with a transition pipe. One of the transition pipes is used to connect to the pipeline of an external device to receive high-pressure fluid, and the other transition pipe is used to connect to the pipeline of a downstream load device to output stable pressure fluid after pressure reduction. The valve seat is provided with a limiting structure for restricting the axial rotation of the transition pipes after the two transition pipes are threadedly connected to their respective through holes, and a sealing structure for working together with the limiting structure to seal the outer peripheral wall of the transition pipe and the inner peripheral wall of the through hole.

[0006] The advantages of adopting the above technical solution are as follows: the anti-loosening pressure reducing valve assembly, through the setting of a limiting structure, can effectively limit the axial rotation of the transition pipe after it is threadedly connected to the through hole, preventing the transition pipe from loosening under conditions such as fluid pressure fluctuations and equipment vibration, thus ensuring connection stability; the linkage between the sealing structure and the limiting structure can enhance the sealing effect between the transition pipe and the through hole, prevent fluid leakage, and improve the overall sealing reliability. At the same time, the integrated structural design enables the solenoid valve assembly, check valve assembly, and valve seat to work together, ensuring the accuracy of pressure regulation and fluid control, and simplifying the disassembly and assembly process through the linkage of limiting and sealing, reducing maintenance difficulty, and making it suitable for various fluid control systems.

[0007] This utility model further includes the following: the limiting structure includes two limiting groups, which are respectively set at the positions of two transition tubes. Each limiting group consists of two limiting plates, which are arranged opposite each other and on both sides of the transition tube. The limiting plates are detachably connected to the valve seat. The outer peripheral wall of the transition tube is provided with a mating protrusion, and the radial cross-section of the mating protrusion is hexagonal. The inner walls of the two limiting plates are provided with limiting grooves, and when the two limiting plates are brought together, the two limiting grooves combine to form a limiting hole. The radial cross-section of the limiting hole is hexagonal. When the two limiting plates are brought together, the inner peripheral wall of the limiting hole abuts against the outer peripheral wall of the mating protrusion.

[0008] The advantages of adopting the above technical solution are as follows: The limiting structure in the above technology uses two limiting groups corresponding to two transition pipes. Each limiting group consists of two opposing limiting plates, which can specifically limit the transition pipe and improve the targeting of anti-loosening. The hexagonal radial cross-section of the transition pipe has a mating protrusion that abuts against the hexagonal limiting hole formed by the two limiting plates. Utilizing the anti-rotation characteristics of the hexagonal structure, the axial rotation of the transition pipe can be stably restricted, enhancing the anti-loosening effect. The above technology allows the limiting plate and valve seat to be detachably connected, which facilitates the installation, adjustment and subsequent maintenance of the limiting structure. At the same time, it is adaptable to the limiting requirements of transition pipes of different specifications. The structure is simple and practical, improving the adaptability and ease of operation of the overall structure.

[0009] The present invention further comprises: a limiting tooth groove is provided on the inner peripheral wall of the limiting hole, and a mating tooth groove is provided on the outer peripheral wall of the mating protrusion; when the two limiting plates are brought together, the limiting tooth groove and the mating tooth groove are engaged.

[0010] The advantages of adopting the above technical solution are as follows: In the above technology, the limiting groove on the inner peripheral wall of the limiting hole and the mating groove on the outer peripheral wall of the mating protrusion are engaged when the limiting plate is brought together. The meshing of the grooves increases the contact friction between the limiting structure and the transition tube, further restricting the axial rotation tendency of the transition tube and strengthening the anti-loosening effect. The meshing structure can disperse the force generated by vibration or pressure fluctuations in the transition tube, avoiding the limiting failure caused by excessive force at a single contact point, and improving the stability and durability of the limiting structure. At the same time, the groove engagement does not affect the gathering and separation operation of the limiting plate, ensuring the ease of disassembly and assembly of the structure while enhancing the reliability of anti-loosening.

[0011] The present invention further comprises: a sliding groove is provided on the valve seat corresponding to each position of the limiting plate; a slider is provided on the bottom wall of the limiting plate; each slider is slidably disposed in the adjacent sliding groove along the length direction of the adjacent sliding groove; the width diameter of the slider is the same as the width diameter of the sliding groove; a fixing hole is provided on the inner wall of the sliding groove; a mating hole is provided through the limiting plate; the mating hole extends to the slider; and a fixing pin is threadedly connected between the mating hole and the fixing hole.

[0012] The advantages of adopting the above technical solution are as follows: In the above technology, the sliding groove of the valve seat and the sliding block of the limiting plate slide together, and the width diameter of the sliding block is the same as the width diameter of the sliding groove. This can limit the radial displacement of the limiting plate, ensure that the limiting plate slides stably along the preset direction, and ensure that the limiting hole formed by the combination of the limiting grooves is precisely aligned with the protrusion of the transition tube, thereby improving the limiting accuracy. The fixing pin is threadedly connected to the fixing hole of the sliding groove through the mating hole, which can firmly fix the position of the limiting plate and prevent the limiting plate from shifting during operation, thereby enhancing the overall stability of the limiting structure. Through the sliding design of the sliding block and the sliding groove and the detachable connection of the fixing pin, it is convenient to adjust the position of the limiting plate according to the installation requirements of the transition tube, simplify the disassembly and assembly process, improve maintenance convenience, and the structural design is compact and reasonable.

[0013] The present invention further comprises: a sealing groove is provided circumferentially on the inner peripheral wall of the through hole opening, a sealing ring is provided in the sealing groove, a sealing sleeve is bent outward from the inner peripheral wall of the sealing ring shaft hole, the sealing sleeve is sleeved on the outer peripheral wall of the transition tube, and when the two limiting plates are closed, the inner peripheral wall of the limiting hole and the outer peripheral wall of the sealing sleeve are tightened together, the sealing sleeve and the sealing ring are integrally connected and the sealing sleeve is made of sealing rubber material.

[0014] The advantages of adopting the above technical solution are as follows: A sealing ring is installed in the sealing groove at the opening of the through hole, and the sealing sleeve of the sealing ring is fitted onto the outer circumferential wall of the transition pipe, which can initially achieve a seal between the transition pipe and the through hole, preventing fluid leakage. The sealing sleeve is made of sealing rubber material, which has good elasticity and sealing performance, and can adapt to the slight deformation of the outer circumferential wall of the transition pipe, improving the sealing fit. When the two limiting plates are closed, they form an expansion fit on the outer circumferential wall of the sealing sleeve, allowing the sealing sleeve to further fit against the inner wall of the transition pipe and the through hole under the action of the limiting structure, realizing the linkage between the sealing structure and the limiting structure, enhancing the sealing reliability. At the same time, the sealing ring and the sealing sleeve are integrally connected, reducing the assembly gap of the sealing components and facilitating overall replacement and maintenance, thus improving the durability and operational convenience of the sealing structure. Attached Figure Description

[0015] Figure 1 This utility model does not have a three-dimensional view of the mating tooth groove and the limiting tooth groove; Figure 2 for Figure 1 A three-dimensional view of a localized explosion; Figure 3 This is a side view of the present invention, showing the mating tooth groove and the limiting tooth groove. Detailed Implementation

[0016] This utility model provides an anti-loosening pressure reducing valve assembly, including a valve seat 1, a solenoid valve assembly 11 and a one-way valve assembly 12 for connection and cooperation with the valve seat 1. The valve seat 1 has a hollow opening with a pressure reducing channel for the solenoid valve assembly 11 and the one-way valve assembly 12 to work together to achieve pressure regulation and fluid control. The outer wall of the valve seat 1 has two through holes 13 for communicating with the pressure reducing channel. Each of the two through holes 13 is threaded with a transition pipe 2. One transition pipe 2 is used to communicate with the pipeline of an external device to receive high-pressure fluid, and the other transition pipe 2 is used to communicate with the pipeline of a downstream load device to output stable pressure fluid after pressure reduction. The valve seat 1 is provided with a connection for the two transition pipes 2 respectively. The system includes a limiting structure that restricts the axial rotation of the transition tube 2 after being threaded into its corresponding through hole 13, and a sealing structure that works in conjunction with the limiting structure to seal the outer peripheral wall of the transition tube 2 and the inner peripheral wall of the through hole 13. The limiting structure includes two limiting groups, which are respectively set at the positions of the two transition tubes 2. Each limiting group consists of two limiting plates 3, which are arranged opposite to each other and on both sides of the transition tube 2. The limiting plates 3 are detachably connected to the valve seat 1. The outer peripheral wall of the transition tube 2 is provided with a mating protrusion 21, and the radial cross-section of the mating protrusion 21 is hexagonal. The inner walls of the two limiting plates 3 are provided with limiting grooves 31, and when the two limiting plates 3 are brought together, the two limiting grooves 31 are provided with limiting grooves 31. A limiting hole 32 is formed by combining two limiting plates 3. The limiting hole 32 has a hexagonal radial cross-section. When the two limiting plates 3 are brought together, the inner peripheral wall of the limiting hole 32 abuts against the outer peripheral wall of the mating protrusion 21. A limiting tooth groove 331 is circumferentially formed on the inner peripheral wall of the limiting hole 32, and a mating tooth groove 211 is circumferentially formed on the outer peripheral wall of the mating protrusion 21. When the two limiting plates 3 are brought together, the limiting tooth groove 331 and the mating tooth groove 211 are engaged. A sliding groove 14 is formed on the valve seat 1 corresponding to the position of each limiting plate 3. A slider 32 is provided on the bottom wall of the limiting plate 3. Each slider 32 slides along the length of the adjacent sliding groove 14 and is set in the adjacent sliding groove 14. The width diameter of the slider 32 is the same as the width diameter of the sliding groove 14. The inner wall of the slide groove 14 is provided with a fixing hole, and the limiting plate 3 is provided with a mating hole 33. The mating hole 33 extends to the slider 32. A fixing pin 34 is threadedly connected between the mating hole 33 and the fixing hole. A sealing groove 131 is provided circumferentially on the inner peripheral wall of the opening of the through hole 13. A sealing ring 132 is provided in the sealing groove 131. A sealing sleeve 133 is bent outward from the inner peripheral wall of the shaft hole of the sealing ring 132 towards the through hole 13. The sealing sleeve 133 is fitted on the outer peripheral wall of the transition tube 2. When the two limiting plates 3 are closed, the inner peripheral wall of the limiting hole 32 and the outer peripheral wall of the sealing sleeve 133 are tightened together. The sealing sleeve 133 and the sealing ring 132 are integrally connected and the sealing sleeve 133 is made of sealing rubber material.

[0017] Overall installation process for the anti-loosening pressure reducing valve assembly: 1. Preparation before installation: Check all components of the anti-loosening pressure reducing valve assembly, including valve seat, solenoid valve assembly, check valve assembly, two transition pipes, two sets of limit plates (including sliders), fixing pins, and sealing rings (with integrated sealing sleeves). Check that each component is free from damage, the threads are free from deformation, and the seals are free from aging. Ensure that all accessories are complete and in good condition.

[0018] 2. Valve seat and core functional component installation: Align the solenoid valve assembly and check valve assembly with the preset installation interfaces on the valve seat, so that the flow channels of both are precisely aligned with the pressure reducing channel inside the valve seat. Fix the solenoid valve assembly and check valve assembly on the valve seat and tighten them to the preset state, ensuring that the components fit the valve seat without gaps, forming a complete pressure regulation and fluid control channel.

[0019] 3. Installation of sealing rings and transition pipes: Install sealing rings into the sealing grooves of the two through holes of the valve seat respectively (ensure that the sealing sleeve of the sealing ring faces the outside of the through hole). Apply an appropriate amount of sealing grease (if needed) to the threaded end of one of the transition pipes (for connecting high-pressure fluid), align it with the internal thread of the corresponding through hole, and tighten it clockwise until the end face of the transition pipe fits against the outer wall of the valve seat. Repeat the above operation to install the other transition pipe (for outputting depressurized fluid) into the other through hole, ensuring that the transition pipe and the thread of the through hole are tightly fitted. At this time, the sealing sleeve of the sealing ring will naturally fit on the outer peripheral wall of the transition pipe, forming a preliminary seal.

[0020] 4. Assembly and Fixing of Limiting Structure: Align the two limiting plates of each limiting group with the corresponding sliding grooves on both sides of the transition pipe on the valve seat. Slide the slider on the bottom wall of the limiting plate into the sliding groove along its length. Push the two limiting plates toward the transition pipe until the limiting groove on the inner wall of the limiting plate aligns with the hexagonal mating protrusion of the transition pipe. Continue to bring the limiting plates together until the inner circumferential wall of the limiting hole fits against the outer circumferential wall of the mating protrusion (if there is a toothed structure, ensure that the limiting toothed groove and the mating toothed groove are fully engaged). Take the fixing pin, pass it through the mating hole of the limiting plate and the slider, align it with the fixing hole on the inner wall of the sliding groove, and rotate the fixing pin clockwise to the tightened state. Repeat the above operation to complete the installation of another set of limiting structures, thereby achieving the anti-loosening limiting of the transition pipe and the expansion and sealing of the sealing sleeve.

[0021] 5. Post-installation inspection and debugging: Manually try rotating the two transition pipes to confirm that there is no axial rotation or loosening; check the fit between the sealing ring and the sealing sleeve to confirm that there are no obvious gaps; connect the external high-pressure fluid source and the downstream load equipment pipeline to the corresponding transition pipe, and slowly introduce low-pressure fluid (below the working pressure) to observe whether there is any fluid leakage at each connection and seal; if there is no leakage, start the solenoid valve assembly and the check valve assembly to test the pressure regulation function of the pressure reducing channel, confirm that the output pressure is stable, and the overall installation is complete.

[0022] The solenoid valve assembly and check valve assembly mentioned above are existing technologies, so their structure and function will not be described in detail. Similarly, the pressure-reducing channel in the pressure-reducing valve is existing technology, so its internal structure and layout will not be described in detail or shown in the accompanying drawings.

[0023] The accompanying drawings in the above-mentioned specification illustrate the shape of the mating protrusion and its mating state with the limiting plate. Figure 1 and 2 Neither the mating gear groove nor the limiting gear groove is shown in the instruction manual, but they are not shown in the appendix. Figure 3 The image shows the working conditions of both components.

[0024] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A pressure-reducing valve assembly with anti-loosening features, comprising a valve seat, a solenoid valve assembly and a check valve assembly for connection and cooperation with the valve seat, wherein the valve seat is hollowly provided with a pressure-reducing channel for the solenoid valve assembly and the check valve assembly to work together to achieve pressure regulation and fluid control, and two through holes are provided on the outer wall of the valve seat for communicating with the pressure-reducing channel, characterized in that: Both through holes are threaded with transition pipes. One of the transition pipes is used to connect to the pipeline of an external device to receive high-pressure fluid, and the other transition pipe is used to connect to the pipeline of a downstream load device to output stable pressure fluid after pressure reduction. The valve seat is provided with a limiting structure for restricting the axial rotation of the transition pipes after the two transition pipes are threadedly connected to their respective through holes, and a sealing structure for working in conjunction with the limiting structure to seal between the outer peripheral wall of the transition pipe and the inner peripheral wall of the through hole.

2. The anti-loosening pressure reducing valve assembly according to claim 1, characterized in that: The limiting structure includes two limiting groups, which are respectively set at the positions of two transition tubes. Each limiting group consists of two limiting plates, which are arranged opposite each other and on both sides of the transition tube. The limiting plates are detachably connected to the valve seat. The outer peripheral wall of the transition tube is provided with a mating protrusion with a hexagonal radial cross-section. The inner walls of the two limiting plates are provided with limiting grooves, and when the two limiting plates are brought together, the two limiting grooves combine to form a limiting hole with a hexagonal radial cross-section. When the two limiting plates are brought together, the inner peripheral wall of the limiting hole abuts against the outer peripheral wall of the mating protrusion.

3. The anti-loosening pressure reducing valve assembly according to claim 2, characterized in that: The inner circumferential wall of the limiting hole is provided with a limiting tooth groove, and the outer circumferential wall of the mating protrusion is provided with a mating tooth groove. When the two limiting plates are brought together, the limiting tooth groove and the mating tooth groove are engaged.

4. The anti-loosening pressure reducing valve assembly according to claim 3, characterized in that: The valve seat has a sliding groove corresponding to each position of the limiting plate. The bottom wall of the limiting plate is provided with a slider. Each slider is slidably disposed in the adjacent sliding groove along the length direction of the adjacent sliding groove. The width diameter of the slider is the same as the width diameter of the sliding groove. The inner wall of the sliding groove is provided with a fixing hole. The limiting plate has a through hole that extends to the slider. A fixing pin is threaded between the through hole and the fixing hole.

5. The anti-loosening pressure reducing valve assembly according to claim 2, characterized in that: A sealing groove is provided circumferentially on the inner peripheral wall of the through hole opening. A sealing ring is provided in the sealing groove. A sealing sleeve is bent outward from the inner peripheral wall of the sealing ring shaft hole. The sealing sleeve is fitted on the outer peripheral wall of the transition tube. When the two limiting plates are closed, the inner peripheral wall of the limiting hole and the outer peripheral wall of the sealing sleeve are tightened together. The sealing sleeve and the sealing ring are integrally connected and the sealing sleeve is made of sealing rubber material.

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