An adjustable pressure overflow device

Abstract

The application relates to an adjustable pressure overflow device and belongs to the technical field of overflow pressure regulating equipment. The device comprises a valve body, a fixing base, a valve rod, a valve sleeve and a bolt piece, a containing cavity is arranged in the valve body, an inlet and an outlet which are in communication with the containing cavity are arranged in the valve body, the fixing base is connected to the first end of the valve body, the valve rod is arranged in the containing cavity, the first end of the valve rod is in sliding fit with the valve body, a first sealing part is arranged on the outer periphery of the second end of the valve rod, the valve sleeve is connected to the second end of the valve body, the first end of the valve sleeve extends into the containing cavity, the second end of the valve sleeve is clamped with the end part of the inlet, the inner periphery of the first end of the valve sleeve is provided with a second sealing part, the second sealing part is matched with the first sealing part to realize sealing, the fixing base is provided with a threaded hole which is coaxial with the containing cavity, the bolt piece is screwed on the fixing base, and the bolt piece is used for pushing or releasing the first end of the valve rod, so that the second sealing part and the first sealing part are selectively sealed. The application has the effect of improving the pressure regulating performance of high-pressure fluid equipment.

Description

Technical Field

[0001] This application relates to the field of overflow pressure regulating equipment technology, and in particular to an overflow device with adjustable pressure. Background Technology

[0002] In the field of high-pressure liquid equipment, as industrial production demands increasingly higher levels of equipment performance and safety, pressure control technology for high-pressure liquid equipment is also continuously evolving. High-pressure liquid equipment is widely used in numerous industrial applications, such as chemical engineering and machinery manufacturing. Its stable operation is crucial for ensuring production efficiency and product quality. Proper pressure control ensures the normal operation of the equipment, preventing equipment damage and safety accidents caused by abnormal pressure, and has an undeniable value for the stability and efficiency of industrial production.

[0003] Currently, the industry standard for pressure control in high-pressure liquid equipment is the use of overflow devices. These devices reduce pressure by opening an overflow orifice when the pressure in the high-pressure liquid equipment exceeds a predetermined value. Specifically, when the equipment pressure rises to a certain level, the overflow orifice of the overflow device opens, allowing excess liquid to drain, thereby reducing the pressure and maintaining it within a certain range.

[0004] However, while overflow devices in related technologies can reduce pressure when it exceeds a predetermined value, they have a significant drawback: they cannot regulate the pressure. This means that in practical applications, when it's necessary to adjust equipment pressure according to different working scenarios and production needs, existing overflow devices cannot meet the requirements, limiting the flexibility and adaptability of high-pressure liquid equipment. Utility Model Content

[0005] In order to improve the pressure regulation performance of high-pressure fluid equipment, this application provides an adjustable pressure overflow device.

[0006] The adjustable pressure overflow device provided in this application adopts the following technical solution: An adjustable pressure overflow device includes: a valve body with a receiving cavity, an inlet and an outlet both communicating with the receiving cavity, the outlet being located on the outer periphery of the valve body; a fixed seat connected to a first end of the valve body; a valve stem disposed within the receiving cavity of the valve body, the first end of the valve stem slidingly engaging with the valve body, the diameter of the first end of the valve stem being larger than the diameter of the second end of the valve stem, and a first sealing portion being provided on the outer periphery of the second end of the valve stem; and a valve sleeve connected to the second end of the valve body, the first end of the valve sleeve extending into the receiving cavity of the valve body, such that the valve body is fitted onto the outer periphery of the first end of the valve sleeve, and the second end of the valve sleeve... The valve sleeve is snapped into place at the inlet end. A second sealing portion is provided on the inner circumference of the first end of the valve sleeve. The second sealing portion cooperates with the first sealing portion to achieve a seal. The inlet is located at the second end of the valve body along the axial direction of the valve body. The outlet is located between the second sealing portion and the first end of the valve stem. A bolt is attached to the fixing seat, which has a threaded hole coaxial with the receiving cavity. The bolt is screwed onto the fixing seat, with its first end outside the receiving cavity and its second end extending into the receiving cavity. The second end of the bolt is used to push or release the first end of the valve stem, allowing the second sealing portion to selectively seal with the first sealing portion.

[0007] By adopting the above technical solution, the receiving cavity of the valve body provides installation space for components such as the valve stem and valve sleeve, while the inlet and outlet are used for fluid inflow and outflow, respectively. The fixed seat connects to the first end of the valve body, providing support for the installation of bolted components. The valve stem is located within the receiving cavity; its first end slides into the valve body, and its second end's first sealing part cooperates with the second sealing part of the valve sleeve to achieve a seal. The structural design, where the diameter of the first end of the valve stem is larger than that of the second end, helps to better control the fluid during sealing and pressure relief processes. The valve sleeve connects to the second end of the valve body; its first end extends into the receiving cavity, and its second end engages with the inlet end. The second sealing part cooperates with the first sealing part of the valve stem, ensuring the sealing performance of the device under normal conditions. The bolt is screwed onto the fixed seat. Its second end can push or release the first end of the valve stem. When the pressure exceeds the predetermined value, the bolt is manually adjusted to move it, creating a gap between the valve stem and the valve sleeve. The fluid is discharged from the outlet, achieving the purpose of pressure relief and overflow. The pressure inside the equipment after pressure relief can be adjusted by manually controlling the pressure relief time and the gap size, ensuring the safety of the equipment and personnel. At the same time, the pressure relief speed can be adjusted according to the number of rotations of the bolt.

[0008] Optionally, both the first sealing portion and the second sealing portion are conical surfaces, and the taper of the first sealing portion and the second sealing portion are the same.

[0009] By adopting the above technical solution, both the first and second sealing parts are conical surfaces with the same taper. This structure allows for a good sealing effect when they are fitted together. When the bolt pushes the valve stem, causing the first and second sealing parts to fit together, the conical surface design increases the sealing contact area, improves the reliability of the seal, and prevents liquid leakage. When pressure relief is required, the first and second sealing parts can be separated by adjusting the bolt, allowing liquid to pass smoothly, thereby achieving the purpose of pressure relief and overflow. Furthermore, the identical taper design facilitates precise adjustment of the pressure relief speed based on the number of rotations of the bolt.

[0010] Optionally, a nut is also provided, which is screwed onto the bolt and is located on the side of the fixing seat away from the valve body. The nut is used to lock the bolt.

[0011] By adopting the above technical solution, the nut is screwed onto the bolt and is located on the side of the fixed seat away from the valve body. After the bolt is adjusted to a suitable position to control the seal and gap between the valve stem and the valve sleeve, the nut can lock the bolt to prevent it from loosening due to vibration or other factors during equipment operation, thus ensuring the stability of the bolt position. This, in turn, ensures that the overflow device can be stably maintained at the set pressure relief or holding state, guaranteeing the safe and stable operation of the high-pressure liquid equipment.

[0012] Optionally, the system further includes a valve block and a connector. The valve block is fitted around the outer periphery of the valve body and around the outer periphery of the outlet. The valve block has a first channel and an output port connected to the first channel. The connector is connected to the output port of the valve body. The connector has a second channel. The second channel communicates with the receiving cavity through the first channel, allowing fluid to flow out through the second channel via the inlet, the receiving cavity, the outlet, the first channel, and the output port.

[0013] By adopting the above technical solution, the valve block is sleeved on the outer periphery of the valve body and on the outer periphery of the outlet. The first channel and the output port of the valve block provide a channel for the fluid to flow out of the receiving cavity. The connector is connected to the output port. The second channel of the connector is connected to the receiving cavity through the first channel, so that the fluid can pass through the inlet, receiving cavity, outlet, first channel, and output port in sequence, and finally flow out from the second channel, realizing the orderly flow and discharge function of the fluid in the overflow device.

[0014] Optionally, it also includes a shaft elastic retaining ring. The outer periphery of the valve body is provided with an assembly part. The valve block is installed on the assembly part. One end of the valve body is snapped into the first end of the assembly part. The second end of the assembly part is provided with a mounting groove. The mounting groove is located on the side of the valve block near the inlet. The shaft elastic retaining ring is located in the mounting groove for axially limiting the valve block.

[0015] By adopting the above technical solution, an assembly part is provided on the outer periphery of the valve body, which can be used to install the valve block, so that the valve block can be accurately positioned on the valve body; one end of the valve body is engaged with the first end of the assembly part, providing a starting positioning point for the valve block installation; the second end of the assembly part is provided with a mounting groove, and the mounting groove is located on the side of the valve block near the inlet, providing an installation position for the shaft elastic retaining ring; the shaft elastic retaining ring is provided in the mounting groove, which can axially limit the valve block, prevent the valve block from displacing in the axial direction, and ensure the stability and reliability of the overflow device structure.

[0016] Optionally, it further includes a first sealing ring, wherein the inner peripheral wall of the receiving cavity is provided with a first mounting portion, the first sealing ring is disposed in the first mounting portion, and the first sealing ring is used to cooperate with the outer periphery of the first end of the valve sleeve so that the inner peripheral wall of the receiving cavity and the outer periphery of the valve sleeve are sealed.

[0017] By adopting the above technical solution, the first mounting part of the inner peripheral wall of the receiving cavity is used to install the first sealing ring. The first sealing ring cooperates with the outer periphery of the first end of the valve sleeve, which can effectively prevent fluid from leaking from the gap between the inner peripheral wall of the receiving cavity and the outer periphery of the valve sleeve. This achieves the sealing between the inner peripheral wall of the receiving cavity and the outer periphery of the valve sleeve, ensuring the sealing and stability of the overflow device, and avoiding pressure instability and equipment and personnel safety hazards that may be caused by fluid leakage.

[0018] Optionally, a second sealing ring is also included. A second mounting portion is provided on the outer periphery of the first end of the valve stem. The second sealing ring is disposed in the second mounting portion. The second sealing ring is used to cooperate with the inner peripheral wall of the receiving cavity so that the outer periphery of the first end of the valve stem is sealed with the inner peripheral wall of the receiving cavity.

[0019] By adopting the above technical solution, a second mounting part is provided on the outer periphery of the first end of the valve stem, which can be used to install a second sealing ring. The second sealing ring cooperates with the inner peripheral wall of the receiving cavity, which can effectively prevent liquid from leaking from the gap between the outer periphery of the first end of the valve stem and the inner peripheral wall of the receiving cavity, thereby achieving a seal between the outer periphery of the first end of the valve stem and the inner peripheral wall of the receiving cavity, ensuring the sealing performance and stability of the overflow device, and avoiding the harm to equipment and personnel caused by high-pressure liquid leakage.

[0020] Optionally, it also includes two sets of third sealing rings. The valve block is provided with two sets of third mounting portions. The two sets of third mounting portions are distributed along the axial direction of the valve body. The two sets of third mounting portions are respectively provided on both sides of the outlet. The third sealing ring is provided correspondingly to the third mounting portion. The third sealing ring is provided in the third mounting portion and is used to cooperate with the outer periphery of the valve body.

[0021] By adopting the above technical solution, the valve block is provided with two sets of third mounting parts distributed along the valve body axis and located on both sides of the outlet. The third sealing ring is correspondingly set in the third mounting part and cooperates with the outer periphery of the valve body. This can effectively prevent fluid leakage from the gap between the valve block and the valve body, improve the sealing performance of the overflow device, and ensure the normal operation of the device and the stability of the pressure regulation function.

[0022] Optionally, the receiving cavity is provided with a connecting cavity, the diameter of which is larger than the maximum diameter of the receiving cavity. The connecting cavity is connected to the outlet. When the first sealing part and the second sealing part cooperate to seal, the first end of the valve stem is located on the side of the connecting cavity away from the inlet.

[0023] By adopting the above technical solution, the receiving cavity is provided with a connecting cavity whose diameter is larger than its maximum diameter and connects to the outlet. When the first sealing part and the second sealing part cooperate to seal, the first end of the valve stem is located on the side of the connecting cavity away from the inlet. The larger diameter of the connecting cavity provides a more spacious flow space for the liquid. The position of the first end of the valve stem on the side of the connecting cavity away from the inlet helps the liquid flow more smoothly from the receiving cavity to the outlet, reducing the resistance to liquid flow and improving the overflow efficiency. At the same time, it provides sufficient room for the valve stem to move within the receiving cavity, avoiding obstruction during the movement of the valve stem and ensuring the normal operation of the device.

[0024] Optionally, the first end of the valve body is screwed to the fixed seat, and the fixed seat is sleeved on the outer periphery of the first end of the valve body.

[0025] By adopting the above technical solution, the valve body and the fixed seat are connected by screws, and the fixed seat is sleeved on the outer periphery of the first end of the valve body. This connection method not only enables the fixed seat to be firmly installed on the valve body, ensuring the reliability of the connection, but also provides a stable basic structure for subsequent cooperation with bolts and other components. At the same time, the screw connection method facilitates disassembly and installation, which is beneficial to the maintenance and repair of the device.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. When the pressure of the high-pressure liquid equipment exceeds the predetermined value, manually adjust the bolts to create a gap between the first sealing part of the valve stem and the second sealing part of the valve sleeve, allowing liquid to drain from the joint, thereby reducing the pressure and ensuring the safety of the equipment and personnel. 2. When the bolts are tightened and press against the valve stem, the valve stem and valve sleeve produce a sealing effect through their respective conical surface structures; 3. The pressure relief speed can be adjusted by adjusting the taper design of the valve stem and valve sleeve and the number of rotations of the bolts, thereby improving the accuracy of the pressure value after pressure relief. Attached Figure Description

[0027] Figure 1This is a schematic diagram of an adjustable pressure overflow device according to an embodiment of this application.

[0028] Figure 2 This is a top view of the adjustable pressure overflow device according to an embodiment of this application.

[0029] Figure 3 yes Figure 2 Cross-sectional view at point AA.

[0030] Figure 4 This is an exploded view of an adjustable pressure overflow device according to an embodiment of this application.

[0031] Figure 5 This is a cross-sectional view of the valve sleeve according to an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures: 1. Valve body; 11. Receiving cavity; 111. Connecting cavity; 12. Inlet; 13. Outlet; 14. Assembly section; 141. Mounting groove; 2. Fixing base; 21. Pressure relief hole; 3. Valve stem; 31. First sealing part; 32. Second mounting part; 4. Valve sleeve; 41. Second sealing part; 51. Bolts; 52. Nuts; 6. Valve block; 61. First channel; 62. Output port; 63. Third mounting part; 7. Connector; 71. Second channel; 8. The shaft uses a flexible retaining ring; 91. First sealing ring; 92. Second sealing ring; 93. Third sealing ring. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be further described in detail below. In this embodiment, unless otherwise specified, "connection", "linking", and "fixing" are interpreted broadly, including fixed connection, detachable connection, connection to form an integral structure, mechanical connection, electrical connection, direct connection, indirect connection through an intermediary, internal connection, and interaction between two components, etc., and can be understood according to the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, in the description of this embodiment, terms such as "above," "below," "left," and "right," etc., are based on the orientation or positional relationships shown in the accompanying drawings and are used only for ease of description and simplification of operation. They 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, and therefore should not be construed as a limitation of this application. Unless otherwise stated, directional terms such as "inner" and "outer" used in this application refer to the outline of the corresponding component itself.

[0035] like Figure 1 , Figure 2 and Figure 3 As shown in the embodiment of this application, an adjustable pressure overflow device (hereinafter referred to as the "device") is disclosed. The device includes a valve body 1, a fixed seat 2, a valve stem 3, a valve sleeve 4, a bolt 51, a nut 52, a valve block 6, a connector 7, a shaft elastic retaining ring 8, a first sealing ring 91, a second sealing ring 92, and a third sealing ring 93. The pressure is released and adjusted by manually adjusting the bolt to control the gap between the valve stem 3 and the valve sleeve 4, achieving the effect of releasing pressure and adjusting pressure when the pressure of the high-pressure liquid equipment exceeds the preset pressure value.

[0036] like Figure 3 , Figure 4 and Figure 5 As shown, valve body 1 is connected to fixed seat 2, fixed seat 2 is screwed to bolt 51, bolt 51 is used to push or release valve stem 3, valve stem 3 cooperates with valve sleeve 4 to achieve sealing, valve block 6 is sleeved on the outer periphery of valve body 1, connector 7 is connected to valve block 6, and elastic retaining ring 8 is used to limit the axial movement of valve block 6. Each sealing ring achieves sealing at its corresponding part, achieving the effect of opening the device to reduce pressure when the pressure of high-pressure liquid equipment exceeds the predetermined value, ensuring the safety of equipment and personnel. At the same time, the pressure relief speed can be adjusted according to the number of rotations of bolt 51. The rotation of bolt 51 can control the gap between valve stem 3 and valve sleeve 4, thereby controlling the liquid discharge and achieving pressure regulation, while each sealing structure ensures the sealing performance of the device and prevents liquid leakage.

[0037] Specifically, the valve body 1 has a receiving cavity 11, an inlet 12, and an outlet 13. The receiving cavity 11 is used to accommodate components such as the valve stem 3 and the valve sleeve 4. The first end of the valve body 1 is connected to the fixing seat 2. The inlet 12 is located at the second end of the valve body 1 for liquid inflow. The outlet 13 is located on the outer periphery of the valve body 1 for liquid outflow. The second end of the valve body 1 has an external thread for connecting to high-pressure liquid equipment to achieve pressure relief and pressure regulation of the equipment.

[0038] like Figure 3 , Figure 4 and Figure 5 As shown, the inner peripheral wall of the receiving cavity 11 is provided with a first mounting part for mounting the first sealing ring 91. The receiving cavity 11 is also provided with a connecting cavity 111, the diameter of which is larger than the maximum diameter of the receiving cavity 11, and the connecting cavity 111 connects to the outlet 13. Furthermore, the diameters of the receiving cavities 11 on both sides of the connecting cavity 111 can be different. For example, the diameter of the receiving cavity 11 near the inlet 12 is smaller than the diameter of the receiving cavity 11 near the fixed seat 2, so as to increase the diameter of the first end of the valve stem 3 and improve the reliability of use. The outer periphery of the valve body 1 is provided with an assembly part 14 for mounting the valve block 6, and the second end of the assembly part 14 is provided with a mounting groove 141 for mounting the shaft elastic retaining ring 8. The first end of the valve body 1 is screwed to the fixed seat 2, and the fixed seat 2 is sleeved on the outer periphery of the first end of the valve body 1. The valve body 1 can be made of a high-strength metal material, such as stainless steel, to ensure that it can withstand the pressure of high-pressure liquid; it can also be made of an alloy material to improve its corrosion resistance and wear resistance.

[0039] The fixed seat 2 is fixed to the valve body 1 by a threaded connection. The fixed seat 2 has a threaded hole, which is coaxially arranged with the receiving cavity 11 for threading the bolt 51. The fixed seat 2 can be made of the same material as the valve body 1, or other suitable materials can be selected according to actual needs. It is understood that the fixed seat 2 is provided with a pressure relief hole 21, which can communicate with the receiving cavity 11 to achieve a safe pressure relief function and improve the safety of use. Since the pressure relief hole 21 on the fixed seat 2 is existing technology, its working principle and setting parameters will not be described in detail here. It can be selected according to the needs.

[0040] like Figure 3 , Figure 4 and Figure 5 As shown, the valve stem 3 is disposed within the receiving cavity 11 of the valve body 1. The first end of the valve stem 3 is slidably fitted with the valve body 1, and the diameter of the first end of the valve stem 3 is larger than the diameter of the second end of the valve stem 3. The outer circumferential surface of the first end of the valve stem 3 is in contact with the inner circumferential surface of the first end of the receiving cavity 11 near the fixed seat 2. A first sealing part 31 is provided on the outer circumference of the second end of the valve stem 3, and the first sealing part 31 is a conical surface. A second mounting part 32 is provided on the outer circumference of the first end of the valve stem 3 for mounting the second sealing ring 92. The valve stem 3 can be made of metal material and its surface is polished to reduce friction between it and the valve body 1 and the valve sleeve 4.

[0041] The valve sleeve 4 is connected to the second end of the valve body 1. The first end of the valve sleeve 4 extends into the receiving cavity 11 of the valve body 1, so that the valve body 1 is fitted onto the outer periphery of the first end of the valve sleeve 4. The inner circumferential surface of the second end of the valve body 1 is in contact with the outer circumferential surface of the first end of the valve sleeve 4. The outer periphery of the first end of the valve sleeve 4 cooperates with the first sealing ring 91 to achieve a seal with the inner circumferential wall of the receiving cavity 11. The second end of the valve sleeve 4 is engaged with the end of the inlet 12, which is located at the second end of the valve body 1, allowing liquid to flow into the receiving cavity 11 from the opening at the end of the second end of the valve sleeve 4. The inner periphery of the first end of the valve sleeve 4 is provided with a second sealing part 41. The second sealing part 41 is a conical surface, and the taper of the second sealing part 41 is the same as that of the first sealing part 31. The second sealing part 41 is used to cooperate with the first sealing part 31 so that the two conical surfaces can be circumferentially fitted together to achieve a seal. Along the axial direction of the valve body 1, the outlet 13 is located between the second sealing part 41 and the first end of the valve stem 3. When the first sealing part 31 and the second sealing part 41 are in contact to seal, the first end of the valve stem 3 is located on the side of the connecting cavity 111 away from the inlet 12, so that when the seal is released, the liquid can easily flow out through the outlet 13. The valve sleeve 4 can be made of metal or other materials, and the material is not limited.

[0042] like Figure 3 , Figure 4 and Figure 5 As shown, bolt 51 is screwed onto fixed seat 2. The first end of bolt 51 is located outside the receiving cavity 11, and the second end of bolt 51 extends into the receiving cavity 11. The second end of bolt 51 is used to push the first end of valve stem 3, so that the second sealing part 41 seals with the first sealing part 31. When the second end of bolt releases its push on the first end of valve stem 3, a gap appears between the first sealing part 31 of valve stem 3 and the second sealing part 41 of valve sleeve 4, achieving pressure relief. Bolt 51 is manually tightened. By changing the number of rotations of bolt 51, the gap between the first sealing part 31 and the second sealing part 41 can be precisely adjusted based on the screw connection, thereby adjusting the speed at which the liquid pressure in the equipment reaches the preset pressure, and ultimately achieving pressure regulation of the liquid in the equipment. After the pressure relief reaches the preset pressure value, bolt 51 can be manually tightened to re-tighten valve stem 3, achieving sealing again. Bolt 51 can be made of high-strength alloy steel to ensure that it can withstand large torques; it can also be made of stainless steel to improve its corrosion resistance.

[0043] like Figure 3 , Figure 4 and Figure 5 As shown, the nut 52 is screwed onto the bolt 51. The nut 52 is located on the side of the fixing seat 2 away from the valve body 1. The nut 52 is used to lock the bolt 51 and prevent the bolt 51 from loosening. The nut 52 can be made of the same material as the bolt 51.

[0044] The valve block 6 is fitted around the outer periphery of the valve body 1. Two outlets 13 can be provided, symmetrically arranged about the axis of the valve body 1, with the valve block 6 fitted around the outer periphery of each outlet 13. The valve block 6 has a first channel 61 and an output port 62 connected to the first channel 61. A connector 7 is connected to the output port 62 of the valve block 6. The connector 7 has a second channel 71, which connects to the receiving cavity 11 through the first channel 61, allowing fluid to flow through the inlet 12, via the receiving cavity 11, outlet 13, first channel 61, and output port 62, and then out through the second channel 71. The valve block 6 is mounted on the assembly part 14. One end of the valve body 1 is engaged with the first end of the assembly part 14. A mounting groove 141 is located on the side of the valve block 6 near the inlet 12. A axial elastic retaining ring 8 is located within the mounting groove 141 to axially limit the valve block 6. The valve block 6 can be made of metal or other materials, depending on the specific requirements.

[0045] like Figure 3 , Figure 4 and Figure 5 As shown, the axial elastic retaining ring 8 is disposed in the mounting groove 141 of the valve body 1 assembly part 14 to limit the axial movement of the valve block 6 and prevent the valve block 6 from moving in the axial direction. The axial elastic retaining ring 8 can be made of spring steel, which has good elasticity and toughness.

[0046] The first sealing ring 91 is disposed in the first mounting part of the receiving cavity 11 and is used to mate with the outer periphery of the second end of the valve sleeve 4 so that the inner peripheral wall of the receiving cavity 11 and the outer periphery of the valve sleeve 4 are sealed. The first sealing ring 91 can be made of rubber material, such as nitrile rubber, which has good sealing performance; or it can be made of fluororubber material to improve its high temperature resistance and chemical corrosion resistance.

[0047] like Figure 3 , Figure 4 and Figure 5 As shown, the second sealing ring 92 is disposed within the second mounting portion 32 of the valve stem 3, and is used to mate with the inner peripheral wall of the receiving cavity 11, so that the outer periphery of the first end of the valve stem 3 is sealed with the inner peripheral wall of the receiving cavity 11. The second sealing ring 92 can be made of the same material as the first sealing ring 91.

[0048] like Figure 3 , Figure 4 and Figure 5As shown, there are two sets of third sealing rings 93, and two sets of third mounting portions 63 are provided on the valve block 6. The two sets of third mounting portions 63 are distributed along the axial direction of the valve body 1, and are respectively located on both sides of the outlet 13. The third sealing ring 93 is correspondingly arranged with the third mounting portion 63 and is located inside the third mounting portion 63 for mating with the outer periphery of the valve body 1. The third sealing ring 93 can be made of the same material as the first sealing ring 91. Specifically, the first sealing ring 91, the second sealing ring 92, and the third sealing ring 93 can all be O-rings.

[0049] In use, this device can utilize the existing pressure gauges and alarms on the high-pressure fluid equipment. By monitoring the alarm status, it determines whether pressure relief is needed. The device also adjusts the number of rotations of the adjusting bolt 51 and the pressure relief time by observing the pressure gauge reading, thus allowing the liquid pressure in the high-pressure fluid equipment to be relieved and precisely adjusted to the required value. It is understood that the device also includes necessary structures for connection, support, drive, positioning, limiting, and sealing functions to ensure its normal operation. The shape, size, material, angle, and quantity of each part of the device can be determined as needed to achieve the corresponding functions.

[0050] The implementation principle of this embodiment is as follows: When the pressure of the high-pressure liquid equipment is normal, the bolt 51 is tightened to hold the valve stem 3 in place. The valve stem 3 and the valve sleeve 4 create a sealing effect through their respective tapered structures. Liquid enters from the second end of the valve sleeve 4 and enters the receiving cavity 11 of the valve body 1, but due to the sealing effect, it will not be discharged from the outlet 13. When the pressure exceeds the predetermined value and an alarm is triggered, the bolt 51 is manually adjusted to move axially towards the fixed seat 2. At this time, a gap appears between the first sealing part 31 of the valve stem 3 and the second sealing part 41 of the valve sleeve 4. Liquid flows into the connecting cavity 111 from the gap and then discharges through the outlet 13, the first channel 61 of the valve block 6, and the second channel 71 of the connector 7, achieving the purpose of pressure relief and overflow. According to the tapered design of the valve stem 3 and the valve sleeve 4, the number of rotations of the bolt 51, and the pressure relief time, the pressure and pressure relief speed inside the equipment after pressure relief can be adjusted. This device has a simple structure and is easy to operate. Through the cooperation of various components, it realizes the functions of pressure regulation and pressure relief, improving the safety and reliability of the high-pressure liquid equipment.

[0051] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An adjustable pressure overflow device, characterized in that, include: A valve body (1) is provided with a receiving cavity (11) inside the valve body (1). The valve body (1) is provided with an inlet (12) and an outlet (13) that are both connected to the receiving cavity (11). The outlet (13) is opened on the outer periphery of the valve body (1). A fixed seat (2) is connected to the first end of the valve body (1); Valve stem (3), the valve stem (3) is disposed in the receiving cavity (11) of the valve body (1), the first end of the valve stem (3) is slidably engaged with the valve body (1), the diameter of the first end of the valve stem (3) is larger than the diameter of the second end of the valve stem (3), and a first sealing part (31) is provided on the outer periphery of the second end of the valve stem (3); A valve sleeve (4) is connected to the second end of the valve body (1). The first end of the valve sleeve (4) extends into the receiving cavity (11) of the valve body (1), so that the valve body (1) is fitted on the outer periphery of the first end of the valve sleeve (4). The second end of the valve sleeve (4) is engaged with the end of the inlet (12). The inner periphery of the first end of the valve sleeve (4) is provided with a second sealing part (41). The second sealing part (41) is used to cooperate with the first sealing part (31) to achieve sealing. The inlet (12) is located at the second end of the valve body (1) along the axial direction of the valve body (1). The outlet (13) is located between the second sealing part (41) and the first end of the valve stem (3). The bolt (51) is provided with a threaded hole in the fixed seat (2), the threaded hole is coaxially arranged with the receiving cavity (11), the bolt (51) is screwed to the fixed seat (2), the first end of the bolt (51) is located outside the receiving cavity (11), the second end of the bolt (51) extends into the receiving cavity (11), and the second end of the bolt (51) is used to push or release the first end of the valve stem (3) so that the second sealing part (41) and the first sealing part (31) can selectively seal.

2. The adjustable pressure overflow device according to claim 1, characterized in that, Both the first sealing part (31) and the second sealing part (41) are conical surfaces, and the taper of the first sealing part (31) and the second sealing part (41) is the same.

3. The adjustable pressure overflow device according to claim 1, characterized in that, A nut (52) is also provided, which is screwed to the bolt (51). The nut (52) is located on the side of the fixing seat (2) away from the valve body (1). The nut (52) is used to lock the bolt (51).

4. The adjustable pressure overflow device according to claim 1, characterized in that, It also includes a valve block (6) and a connector (7). The valve block (6) is sleeved on the outer periphery of the valve body (1) and the valve block (6) is sleeved on the outer periphery of the outlet (13). The valve block (6) is provided with a first channel (61) and an output port (62) connected to the first channel (61). The connector (7) is connected to the output port (62) of the valve body (1). The connector (7) is provided with a second channel (71). The second channel (71) is connected to the receiving cavity (11) through the first channel (61), so that fluid can flow out from the second channel (71) through the inlet (12), the receiving cavity (11), the outlet (13), the first channel (61), the output port (62).

5. The adjustable pressure overflow device according to claim 4, characterized in that, It also includes a shaft elastic retaining ring (8), and the outer periphery of the valve body (1) is provided with an assembly part (14). The valve block (6) is installed on the assembly part (14). One end of the valve body (1) is snapped into the first end of the assembly part (14). The second end of the assembly part (14) is provided with an installation groove (141). The installation groove (141) is located on the side of the valve block (6) near the inlet (12). The shaft elastic retaining ring (8) is located in the installation groove (141) and is used to limit the axial movement of the valve block (6).

6. The adjustable pressure overflow device according to claim 1, characterized in that, It also includes a first sealing ring (91), the inner peripheral wall of the receiving cavity (11) is provided with a first mounting part, the first sealing ring (91) is provided in the first mounting part, and the first sealing ring (91) is used to cooperate with the outer periphery of the first end of the valve sleeve (4) so ​​that the inner peripheral wall of the receiving cavity (11) and the outer periphery of the valve sleeve (4) are sealed.

7. The adjustable pressure overflow device according to claim 1, characterized in that, It also includes a second sealing ring (92). The valve stem (3) has a second mounting part (32) on the outer periphery of the first end. The second sealing ring (92) is located in the second mounting part (32). The second sealing ring (92) is used to cooperate with the inner peripheral wall of the receiving cavity (11) so that the outer periphery of the first end of the valve stem (3) is sealed with the inner peripheral wall of the receiving cavity (11).

8. The adjustable pressure overflow device according to claim 4, characterized in that, It also includes two sets of third sealing rings (93). The valve block (6) is provided with two sets of third mounting parts (63). The two sets of third mounting parts (63) are distributed along the axial direction of the valve body (1). The two sets of third mounting parts (63) are respectively located on both sides of the outlet (13). The third sealing ring (93) is correspondingly provided with the third mounting part (63). The third sealing ring (93) is located inside the third mounting part (63). The third sealing ring (93) is used to cooperate with the outer periphery of the valve body (1).

9. The adjustable pressure overflow device according to claim 1, characterized in that, The receiving cavity (11) is provided with a connecting cavity (111), the diameter of which is greater than the maximum diameter of the receiving cavity (11). The connecting cavity (111) is connected to the outlet (13). When the first sealing part (31) and the second sealing part (41) cooperate to seal, the first end of the valve stem (3) is located on the side of the connecting cavity (111) away from the inlet (12).

10. The adjustable pressure overflow device according to claim 1, characterized in that, The first end of the valve body (1) is screwed to the fixed seat (2), and the fixed seat (2) is sleeved on the outer periphery of the first end of the valve body (1).

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