Pressure regulating valve with pressure relief function

Abstract

The utility model relates to the technical field of pressure regulating valves, in particular to a pressure regulating valve with a pressure relief function, which is characterized in that a hollow rotating ring is rotatably connected in a supporting circular ring, three eccentric abutting wheels are rotatably connected in the hollow rotating ring, and the outer surfaces of the three eccentric abutting wheels are fixedly connected with arc-shaped connecting blocks; the outer surface of the hollow rotating ring is fixedly connected with a round rod handle, the round rod handle is held by hand to pull the hollow rotating ring to rotate in the supporting circular ring, and as the arc-shaped connecting blocks on the three eccentric abutting wheels are arranged in the fixed U-shaped limiting seat, the U-shaped limiting seat limits the motion trails of the eccentric abutting wheels, and the eccentric abutting wheels can rotate in the supporting circular ring. The eccentric abutting wheels eccentrically rotate in the process of rotating along with the hollow rotating ring, finally, the three eccentric abutting wheels rotate at the same time and abut against the portion, connected with the rubber hose in a sleeved mode, of the outer threaded pipe connector, and the connection stability is enhanced through the abutting effect. And relative displacement between the external thread pipe joint and the rubber hose due to vibration or external force is prevented.

Description

Technical Field

[0001] This utility model relates to the field of pressure regulating valve technology, and in particular to a pressure regulating valve with pressure relief function. Background Technology

[0002] Pressure regulating valves with pressure relief functions are crucial in various systems involving fluid pressure control. They are primarily used to precisely regulate fluid pressure within the system, ensuring pressure stability within a set range, and to promptly release pressure when it abnormally rises, protecting system equipment. They are widely used in gas conveying systems, hydraulic power systems in industrial production, and water supply and drainage systems in buildings. Through precise regulation of fluid pressure and overpressure protection, they help maintain the stability of the production process, ensure the normal operation of equipment, and reduce safety accidents caused by pressure problems. Currently, pressure regulating valves with pressure relief functions typically require the following technologies in practical applications:

[0003] 1. Reliable pressure sensing elements that can accurately detect pressure changes and respond promptly;

[0004] 2. The high-precision pilot valve and main valve structure ensures a stable opening under normal pressure and rapid and effective pressure relief in case of overpressure.

[0005] 3. The valve body is made of robust, durable, and highly corrosion-resistant material to adapt to different fluid media and harsh working environments;

[0006] 4. Good sealing materials and structure prevent fluid leakage and ensure stable performance of the pressure regulating valve;

[0007] 5. A stable connection structure ensures a secure connection between the pressure regulating valve and the pipeline, preventing loosening due to vibration or other factors.

[0008] Currently, various methods and approaches are used to connect pressure regulating valves to pipelines. Most pressure regulating valves use pipe fittings and insert-type flexible hoses to achieve the connection between the pressure regulating valve and the pipeline.

[0009] However, the above method has a prominent hardware structure problem: the pressure in the gas system is not constant, but there is a certain degree of pressure pulsation. This may be caused by the periodic operation of the gas compressor, the intermittent start and stop of the gas-using equipment, etc. Pressure pulsation will cause the gas pipeline and pipe joint to vibrate. This vibration is transmitted through the connection parts, causing the hoses at the connection parts to gradually loosen. Over time, this will affect the stability of the connection parts. Utility Model Content

[0010] To address the shortcomings of existing technologies, this utility model provides a pressure regulating valve with a pressure relief function, which solves the problem that the pressure in a gas system is not constant but fluctuates to a certain extent. This may be caused by the periodic operation of the gas compressor, the intermittent start and stop of the gas-using equipment, etc. Pressure fluctuations will cause the gas pipeline and pipe joints to vibrate. This vibration is transmitted through the connection parts, causing the hoses at the connection parts to gradually loosen. Over time, this will affect the stability of the connection parts.

[0011] To achieve the above objectives, this utility model provides the following technical solution:

[0012] A pressure regulating valve with a pressure relief function includes a supporting ring. A rotating mechanism for clamping and reinforcing is rotatably connected inside the supporting ring. The rotating mechanism includes a hollow rotating ring and three eccentric clamping wheels. The hollow rotating ring is rotatably connected inside the supporting ring, and the three eccentric clamping wheels are all rotatably connected inside the hollow rotating ring. A blocking mechanism for limiting the three eccentric clamping wheels is provided on the outer surface of the supporting ring. The blocking mechanism includes three U-shaped limiting seats. An arc-shaped connecting block is fixedly connected to the outer surface of each of the three eccentric clamping wheels. The three arc-shaped connecting blocks are respectively disposed inside the three U-shaped limiting seats. A round rod handle is fixedly connected to the outer surface of the hollow rotating ring.

[0013] Preferably, a rubber ring is fitted onto the outer surface of the hollow rotating ring.

[0014] Preferably, the supporting ring is fitted with an externally threaded pipe fitting, and the externally threaded pipe fitting is fitted with a rubber hose.

[0015] Preferably, the external threaded pipe fitting has a regulating valve body threadedly connected to its outer surface, and a pressure gauge is threadedly connected to the inside of the regulating valve body.

[0016] Preferably, a regulating valve mounting bracket is fitted onto the outer surface of the regulating valve body.

[0017] Preferably, a retaining ring cap is threaded onto the outer surface of the regulating valve body.

[0018] Preferably, a positioning ring is fitted onto the outer surface of the regulating valve body.

[0019] Preferably, the positioning ring has two rectangular blocks fixedly connected inside.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Hold the round handle and pull the hollow rotating ring to rotate it inside the supporting ring. Because the arc-shaped connecting blocks on the three eccentric clamping wheels are placed in the fixed U-shaped limit seats, the U-shaped limit seats restrict the movement trajectory of the eccentric clamping wheels. This causes the eccentric clamping wheels to rotate eccentrically as they follow the rotation of the hollow rotating ring. Finally, the three eccentric clamping wheels rotate simultaneously and abut against the part of the external threaded pipe joint that is connected to the rubber hose. On the one hand, the clamping action enhances the stability of the connection and prevents relative displacement between the external threaded pipe joint and the rubber hose due to vibration or external force, thus delaying the loosening of the connection. On the other hand, it makes the fit between the rubber hose and the external threaded pipe joint tighter, thereby increasing the sealing of the connection.

[0022] 2. Before installing the control valve body, first fit the rectangular block inside the positioning ring onto the outer ring of the control valve body. Since the rectangular block matches the dimensions of both sides of the control valve mounting bracket, the control valve mounting bracket can quickly and accurately find its relative position with the control valve body without repeated adjustments and calibrations, greatly saving installation time and improving installation efficiency. It also ensures that the control valve mounting bracket and the control valve body will not be laterally misaligned during installation, guaranteeing the accuracy of subsequent fixing operations. This, in turn, ensures the installation accuracy of the entire control valve on the mounting bracket, laying the foundation for its normal operation. Attached Figure Description

[0023] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is an exploded view of the regulating valve mounting bracket connection of this utility model;

[0026] Figure 3 This is an exploded view of the external threaded pipe joint connection of this utility model;

[0027] Figure 4 This is an exploded view of the hollow rotating ring connection of this utility model.

[0028] Legend: 11. Support ring; 12. Hollow rotating ring; 13. Eccentric clamping wheel; 14. U-shaped limit seat; 15. Arc-shaped connecting block; 16. Round rod handle; 17. Rubber ring; 18. External threaded pipe fitting; 19. Rubber hose; 21. Control valve body; 22. Pressure gauge; 23. Control valve mounting bracket; 24. Fixing ring cap; 25. Positioning ring; 26. Rectangular block. Detailed Implementation

[0029] This application provides a pressure regulating valve with a pressure relief function, effectively solving the problem that the pressure in a gas system is not constant but fluctuates to a certain extent. This fluctuation may be caused by the periodic operation of the gas compressor, the intermittent start-stop of gas-using equipment, etc. Pressure fluctuations cause vibrations in gas pipelines and pipe joints. This vibration is transmitted through the connection points, causing the hoses at the connection points to gradually loosen. Over time, this will affect the stability of the connection points. By holding the round rod handle and pulling the hollow rotating ring to rotate it within the support ring, the arc-shaped connection on the three eccentric clamping wheels... The block is placed inside a fixed U-shaped limiting seat. The U-shaped limiting seat restricts the movement trajectory of the eccentric clamping wheel, causing the eccentric clamping wheel to rotate eccentrically as it follows the rotation of the hollow rotating ring. Ultimately, the three eccentric clamping wheels rotate simultaneously and abut against the part of the external threaded pipe joint that is fitted with the rubber hose. On the one hand, the clamping action enhances the stability of the connection, preventing relative displacement between the external threaded pipe joint and the rubber hose due to vibration or external force, thus delaying the loosening of the connection. On the other hand, it makes the fit between the rubber hose and the external threaded pipe joint tighter, thereby increasing the sealing of the connection.

[0030] Example

[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the technical solution in this application effectively solves the problem that the pressure in a gas system is not constant but fluctuates to a certain extent. This may be caused by the periodic operation of the gas compressor, the intermittent start-stop of the gas-using equipment, etc. Pressure fluctuations cause vibrations in the gas pipeline and pipe joints. This vibration is transmitted through the connection points, causing the hoses at the connection points to gradually loosen. Over time, this will affect the stability of the connection points. The overall idea is as follows: A pressure regulating valve with a pressure relief function includes a supporting ring 11. A rotating mechanism for clamping and reinforcing is rotatably connected inside the supporting ring 11. The rotating mechanism includes a hollow rotating ring 12 and three eccentric clamping wheels 13. The hollow rotating ring 12 is rotatably connected to the supporting ring 11. Inside the hollow rotating ring 11, three eccentric clamping wheels 13 are rotatably connected to the hollow rotating ring 12. A blocking mechanism for limiting the three eccentric clamping wheels 13 is provided on the outer surface of the supporting ring 11. The blocking mechanism includes three U-shaped limiting seats 14. Arc-shaped connecting blocks 15 are fixedly connected to the outer surfaces of the three eccentric clamping wheels 13, and are respectively located inside the three U-shaped limiting seats 14. A round rod handle 16 is fixedly connected to the outer surface of the hollow rotating ring 12. A rubber ring 17 is sleeved on the outer surface of the hollow rotating ring 12 and is located inside the supporting ring 11. An external threaded pipe connector 18 is sleeved inside the supporting ring 11. A rubber hose 19 is sleeved inside the external threaded pipe connector 18, and an adjustment mechanism is threaded onto the outer surface of the external threaded pipe connector 18. The valve body 21 consists of a pilot valve and a main valve. Under normal pressure, the pilot valve is closed, and the main valve maintains a certain opening under spring force to stabilize the gas pressure. When the gas pressure rises above the pilot valve's set pressure, the pilot valve opens, and a small amount of gas enters the upper chamber of the main valve through the pilot valve, reducing the pressure in the upper chamber. Under the pressure difference between the upper and lower chambers, the main valve rapidly opens, and a large amount of gas overflows back to the low-pressure end or the atmosphere, achieving pressure relief and ensuring that the system pressure does not exceed the set value. The valve body 21 is fitted with two external threaded pipe fittings 18 by screwing them on. Teflon tape should be fitted onto the outer surface of the two external threaded pipe fittings 18 to ensure a tight seal. Two rubber hoses 1 are fitted inside the two external threaded pipe fittings 18. 9. Two rubber hoses 19 are used for air inlet and outlet respectively. After the threaded installation of the external threaded pipe joint 18 is completed, the support ring 11 is fitted onto the outer surface of the external threaded pipe joint 18. The hollow rotating ring 12 is rotated by pulling the handle 16 of the round rod. The hollow rotating ring 12 rotates inside the support ring 11, and its rotating connection part is fitted with a rubber ring 17 to increase its friction and ensure the stability of the hollow rotating ring 12 after rotation. When the hollow rotating ring 12 rotates, it drives the three eccentric clamping wheels 13 to rotate. The arc-shaped connecting blocks 15 installed on the surface of the three eccentric clamping wheels 13 are set at the notch inside the U-shaped limit seat 14. Since the eccentric clamping wheels 13 rotate with the hollow rotating ring 12, but the U-shaped limit seat 14 is fixed, therefore…During the rotation of the hollow rotating ring 12, the eccentric clamping wheels 13 are compressed and pushed to rotate eccentrically. The three eccentric clamping wheels 13 rotate simultaneously and abut against the surface of the external threaded pipe joint 18 connected to the rubber hose 19, thus tightening and reinforcing the connection and ensuring its stability. Simultaneously, the contact blocking effect of the three eccentric clamping wheels 13 increases the sealing of the connection.

[0032] The regulating valve body 21 is internally threaded with a pressure gauge 22. A regulating valve mounting bracket 23 is fitted onto the outer surface of the regulating valve body 21. A fixing ring cap 24 is threaded onto the outer surface of the regulating valve body 21. The fixing ring cap 24 is located at the upper end of the regulating valve mounting bracket 23. The regulating valve body 21 can regulate the inlet and outlet gas pressure. During use, the current set pressure value can be determined by observing the rotating pointer inside the pressure gauge 22. When installing the regulating valve body 21, first, the regulating valve mounting bracket 23 is fitted onto the surface of the regulating valve body 21. Then, the fixing ring cap 24 is screwed onto the external thread of the regulating valve body 21. The fixing ring cap 24 presses against the surface of the regulating valve mounting bracket 23. At this time, the regulating valve body 21 can be fixedly installed by the regulating valve mounting bracket 23.

[0033] A positioning ring 25 is fitted onto the outer surface of the regulating valve body 21. Two rectangular blocks 26 are fixedly connected inside the positioning ring 25. The two rectangular blocks 26 are located on both sides of the regulating valve mounting bracket 23. Before installation, the rectangular blocks 26 are first fitted onto the outer ring of the regulating valve body 21. The two rectangular blocks 26 installed inside the positioning ring 25 are sized to match the two sides of the regulating valve mounting bracket 23. At this time, the regulating valve mounting bracket 23 is placed on the upper end of the positioning ring 25, and then the fixing ring cap 24 is tightened and limited.

[0034] To address the problems existing in the prior art, this utility model provides a pressure regulating valve with a pressure relief function. By holding the round rod handle 16 and pulling the hollow rotating ring 12 to rotate within the supporting ring 11, the arc-shaped connecting blocks 15 on the three eccentric pressing wheels 13 are placed within the fixed U-shaped limiting seat 14. The U-shaped limiting seat 14 restricts the movement trajectory of the eccentric pressing wheels 13, causing the eccentric pressing wheels 13 to rotate eccentrically as they follow the rotation of the hollow rotating ring 12. Ultimately, the three eccentric pressing wheels 13 rotate simultaneously and abut against the part where the external threaded pipe joint 18 is fitted with the rubber hose 19. On the one hand, the abutment action enhances the stability of the connection, preventing relative displacement between the external threaded pipe joint 18 and the rubber hose 19 due to vibration or external force, thus delaying the loosening of the connection. On the other hand, it makes the fit between the rubber hose 19 and the external threaded pipe joint 18 tighter, thereby increasing the sealing of the connection.

[0035] Support ring 11: provides installation space for the rotating mechanism, allowing the hollow rotating ring 12 to rotate inside it, forming a clamping and reinforcing structural frame; it is sleeved on the outer surface of the external threaded pipe joint 18, preparing for subsequent clamping and reinforcing connection;

[0036] Hollow rotating ring 12: It is the main component of the rotating mechanism. It rotates inside the supporting ring 11 and drives the eccentric clamping wheel 13 to rotate synchronously. Its outer surface is connected to the round rod handle 16 for easy operation and rotation. It is also fitted with a rubber ring 17, which cooperates with the supporting ring 11 to increase friction and enable stable positioning after rotation.

[0037] Eccentric clamping wheel 13: Rotatably connected inside the hollow rotating ring 12, it rotates with the ring; the arc-shaped connecting block 15 on the outer surface cooperates with the U-shaped limiting seat 14, causing eccentric rotation; finally, it abuts against the external threaded pipe joint 18 where it is connected to the rubber hose 19, tightening and reinforcing the connection, enhancing stability and sealing, and preventing loosening and gas leakage.

[0038] U-shaped limiting seat 14: It is set on the outer surface of the supporting ring 11. By cooperating with the arc-shaped connecting block 15 on the eccentric pressing wheel 13, it restricts the movement trajectory of the eccentric pressing wheel 13, so that it rotates eccentrically when it follows the hollow rotating ring 12.

[0039] Arc-shaped connecting block 15: Fixed on the outer surface of the eccentric clamping wheel 13, interacting with the U-shaped limiting seat 14, causing the eccentric clamping wheel 13 to rotate eccentrically when the hollow rotating ring 12 rotates, thereby achieving clamping of the connecting part;

[0040] Round rod handle 16: Fixed on the outer surface of hollow rotating ring 12, making it convenient for the operator to hold and pull, thereby driving the hollow rotating ring 12 to rotate inside the support ring 11 and operating the entire rotating mechanism;

[0041] Rubber ring 17: It is fitted on the outer surface of the hollow rotating ring 12 and located inside the supporting ring 11, increasing the friction between the hollow rotating ring 12 and the supporting ring 11 at the rotating connection point, and ensuring that the hollow rotating ring 12 is stably positioned after rotation.

[0042] External threaded pipe fitting 18: It is connected to the regulating valve body 21 by thread, and a rubber hose 19 is sleeved inside to realize the connection between the regulating valve body 21 and the rubber hose 19 for gas inlet and outlet; a support ring 11 can be sleeved on the outer surface to cooperate with the rotating mechanism to tighten and reinforce the connection with the rubber hose 19.

[0043] Rubber hose 19: Inserted into the external threaded pipe fitting 18, used to transport gas. The connection part with the external threaded pipe fitting 18 is tightened and reinforced by the rotating mechanism to ensure the connection sealing and stability.

[0044] The regulating valve body 21 consists of a pilot valve and a main valve, used to regulate the inlet and outlet gas pressure. Under normal pressure, the pilot valve is closed, and the main valve maintains stable gas pressure under the action of spring force. When the pressure is too high, the pilot valve opens and the main valve releases pressure to ensure that the system pressure does not exceed the set value. It is connected to the gas pipeline by threaded external thread pipe fitting 18, and the outer surface can be fitted with regulating valve mounting bracket 23, positioning ring 25 and other components for installation and fixation.

[0045] Pressure gauge 22: It is threaded inside the regulating valve body 21. When the pressure regulating valve is working, the operator can intuitively judge the current gas set pressure value by observing the position of its rotating pointer so as to adjust the gas pressure status.

[0046] Control valve mounting bracket 23: It is sleeved on the outer surface of the control valve body 21 and is fixed by the fixing ring cap 24, which plays a role in fixing the control valve body 21 and ensuring the stability of the control valve body 21 during operation.

[0047] Fixing ring cap 24: threaded connection to the outer surface of the regulating valve body 21 and located at the upper end of the regulating valve mounting bracket 23. Tightening the fixing ring cap 24 can press down against the regulating valve mounting bracket 23, and firmly fix the regulating valve body 21 on the regulating valve mounting bracket 23.

[0048] Positioning ring 25: It is fitted onto the outer surface of the regulating valve body 21. The rectangular block 26 fixedly connected inside is adapted to the dimensions of both sides of the regulating valve mounting bracket 23, which plays a preliminary positioning role for the regulating valve mounting bracket 23, making it convenient and accurate to install, and improving installation efficiency and accuracy.

[0049] Rectangular block 26: Fixed inside the positioning ring 25, it fits with both sides of the regulating valve mounting bracket 23. When installing the regulating valve body 21, it enables the regulating valve mounting bracket 23 to quickly and accurately find its relative position with the regulating valve body 21, preventing lateral misalignment during installation and ensuring installation accuracy.

[0050] Working principle:

[0051] The first step involves the regulating valve body 21, which consists of a pilot valve and a main valve. When the system gas pressure is normal, the pilot valve is closed, and the main valve is maintained at a certain opening due to spring force, keeping the gas pressure stable and ensuring that the gas is delivered and used normally according to the set pressure. When the gas pressure rises and exceeds the preset pressure value of the pilot valve, the pilot valve opens, and a small amount of gas flows into the upper chamber of the main valve through the pilot valve. This reduces the pressure in the upper chamber of the main valve, creating a pressure difference between the upper and lower chambers. Under the action of this pressure difference, the main valve opening rapidly increases, and a large amount of gas overflows back to the low-pressure end or is directly discharged into the atmosphere, thereby reducing the system pressure and ensuring the system's stability. The pressure does not exceed the set value, achieving a pressure relief protection function. The regulating valve body 21 is screwed to two external threaded pipe fittings 18 via threads. To ensure sealing, the outer surface of the external threaded pipe fittings 18 needs to be wrapped with Teflon tape. Two rubber hoses 19 are respectively inserted into the external threaded pipe fittings 18 to allow gas to enter and exit. A pressure gauge 22 is internally threaded into the regulating valve body 21. During the operation of the pressure regulating valve, by observing the position of the rotating pointer inside the pressure gauge 22, the operator can intuitively judge the current set pressure value of the gas, so as to understand and adjust the gas pressure status in a timely manner and ensure that the system operates within a suitable pressure range.

[0052] The second step involves placing the support ring 11 onto the outer surface of the external threaded pipe joint 18. Then, by holding the round handle 16, the hollow rotating ring 12 is pulled to rotate within the support ring 11. The rubber ring 17, which connects the hollow rotating ring 12 to the support ring 11, increases friction, ensuring stable positioning of the hollow rotating ring 12 after rotation. The rotation of the hollow rotating ring 12 drives the three eccentric clamping wheels 13 to rotate synchronously. Since the arc-shaped connecting blocks 15 on the three eccentric clamping wheels 13 are placed within the fixed U-shaped limiting seats 14, the U-shaped limiting seats 14 restrict the movement trajectory of the eccentric clamping wheels 13. This causes the eccentric clamping wheels 13 to rotate eccentrically as they follow the rotation of the hollow rotating ring 12. Ultimately, the three eccentric clamping wheels 13 rotate simultaneously and abut against the portion of the external threaded pipe joint 18 where it connects to the rubber hose 19. This abutment enhances the stability of the connection and prevents the external threaded pipe joint 18 from contacting the rubber hose 19. The relative displacement between the 9 parts due to vibration or external force delays the loosening of the connection. On the other hand, it makes the fit between the rubber hose 19 and the external threaded pipe joint 18 tighter, thereby increasing the sealing of the connection and preventing gas leakage. Before installing the regulating valve body 21, when installing the regulating valve body 21, first fit the rectangular block 26 in the positioning ring 25 onto the outer ring of the regulating valve body 21. Since the rectangular block 26 is compatible with the dimensions of both sides of the regulating valve mounting bracket 23, the regulating valve mounting bracket 23 can quickly and accurately find the relative position with the regulating valve body 21 without repeated adjustment and calibration, which greatly saves installation time and improves installation efficiency. It also ensures that the regulating valve mounting bracket 23 and the regulating valve body 21 will not be laterally misaligned during the installation process, ensuring the accuracy of subsequent fixing operations, and thus ensuring the installation accuracy of the entire regulating valve on the mounting bracket, laying the foundation for its normal operation.

[0053] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A pressure regulating valve with a pressure relief function, comprising a supporting ring (11), wherein a rotating mechanism for clamping and reinforcing is rotatably connected inside the supporting ring (11), the rotating mechanism comprising a hollow rotating ring (12) and three eccentric clamping wheels (13), the hollow rotating ring (12) being rotatably connected inside the supporting ring (11), and the three eccentric clamping wheels (13) being rotatably connected inside the hollow rotating ring (12), characterized in that, The outer surface of the supporting circular ring (11) is provided with a blocking mechanism for limiting three eccentric abutting wheels (13), the blocking mechanism comprises three U-shaped limiting seats (14), the outer surface of each of the three eccentric abutting wheels (13) is fixedly connected with an arc-shaped connecting block (15), and the three arc-shaped connecting blocks (15) are arranged in the three U-shaped limiting seats (14) respectively. Wherein, the outer surface of the hollow rotating ring (12) is fixedly connected with a round rod handle (16).

2. The pressure regulating valve with pressure relief function according to claim 1, characterized in that, The outer surface of the hollow rotating ring (12) is sleeved with a rubber ring (17). Wherein, the rubber ring (17) is arranged in the supporting circular ring (11).

3. The pressure regulating valve with pressure relief function according to claim 2, wherein The inner surface of the supporting circular ring (11) is sleeved with an outer threaded pipe joint (18). Wherein, the inner surface of the outer threaded pipe joint (18) is sleeved with a rubber hose (19).

4. The pressure regulating valve with pressure relief function according to claim 3, characterized in that, The outer surface of the outer threaded pipe joint (18) is threadedly connected with an adjusting valve body (21). Wherein, the inner surface of the adjusting valve body (21) is threadedly connected with a pressure gauge (22).

5. The pressure regulating valve with pressure relief function according to claim 4, wherein The outer surface of the adjusting valve body (21) is sleeved with an adjusting valve mounting rack (23).

6. The pressure regulating valve with pressure relief function according to claim 5, wherein The outer surface of the adjusting valve body (21) is threadedly connected with a fixed ring cap (24).

7. The pressure regulating valve with pressure relief function according to claim 6, wherein The fixed ring cap (24) is located on the upper end of the adjusting valve mounting rack (23). Wherein, the outer surface of the adjusting valve body (21) is sleeved with a positioning circular ring (25).

8. The pressure regulating valve with pressure relief function according to claim 7, characterized in that, The inner surface of the positioning circular ring (25) is fixedly connected with two rectangular blocks (26). Wherein, the two rectangular blocks (26) are located on both sides of the adjusting valve mounting rack (23).

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