Air pressure regulating valve

Abstract

The utility model discloses an air pressure regulating valve which comprises a valve body, a diaphragm type air pressure regulating mechanism and a flow regulating mechanism corresponding to a low-pressure gas outlet, the valve body comprises an air pressure regulating chamber, a high-pressure gas inlet and at least one low-pressure gas outlet, and the air pressure regulating chamber comprises a low-pressure chamber and a high-pressure chamber. The high-pressure chamber and the low-pressure chamber are separated by a valve seat, the high-pressure gas inlet is communicated with the high-pressure chamber through a high-pressure gas channel, the valve body comprises a flow valve hole matched with the flow regulating mechanism, and an inlet of the flow valve hole is communicated with the low-pressure chamber through a middle gas channel; outlets of the flow valve holes are communicated with the corresponding low-pressure gas outlets through the corresponding low-pressure gas channels; the flow adjusting mechanism comprises a flow valve element and a flow adjusting knob for controlling the flow valve element to move axially. According to the utility model, not only can the air pressure be adjusted, but also the flow of the output low-pressure air can be adjusted, so that the requirements of modern equipment on air pressure and flow control are met.

Description

Technical Field

[0001] The utility model relates to a gas control valve, in particular to a gas pressure regulating valve. Background Art

[0002] In modern industry, healthcare, scientific research and other fields, stable supply and precise control of gas are crucial. Especially in situations where high-pressure gas is required as a power source or reaction medium, such as pneumatic instruments, pipeline purging, pneumatic tools, gas compressors, ventilators in medical equipment, and gas analyzers in laboratories, strict requirements are placed on gas pressure and flow.

[0003] However, high-pressure gas often cannot directly meet the low-pressure requirements of these devices. The traditional solution is to use a pressure reducing valve to reduce the high-pressure gas to the required pressure level. However, this pressure reduction method often has problems, such as imprecise pressure regulation, inflexible flow control, and slow system response. Furthermore, as modern equipment demands increasingly precise gas pressure and flow control, traditional pressure reducing valves are no longer able to meet these requirements.

[0004] The utility model with patent number CN202323662626.2 discloses a high-precision air pressure regulating valve for equipment, which relates to the technical field of air pressure regulating valves and includes: a valve body and a connecting ring, a valve cover is provided on the top of the valve body, a threaded rod is connected to the internal thread of the valve cover, a pressure spring is provided at the bottom of the threaded rod, and a diaphragm is provided at the bottom of the pressure spring. The high-precision air pressure regulating valve for equipment is used to press two sets of rubber membranes at the same time. When the rubber membrane moves, it pushes the push rod, which can push the clamping rod on one side to rotate. When the two sets of clamping rods rotate, they squeeze the second return spring, causing it to contract. When the clamping rod enters any two sets of grooves inside the connecting block, the clamping rod can engage with the connecting block. At this time, turning the handle will drive the connecting block and the threaded rod to rotate synchronously. The threaded rod will be threaded with the valve cover, and then move to adjust the air pressure regulating valve. Although the high-precision air pressure regulating valve for equipment of this utility model can adjust the air pressure, it cannot adjust the flow of gas. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a gas pressure regulating valve capable of regulating the flow of low-pressure gas.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is a pressure regulating valve, comprising a valve body, a diaphragm-type pressure regulating mechanism and a flow regulating mechanism corresponding to the low-pressure gas outlet, the valve body comprising an air pressure regulating chamber, a high-pressure gas inlet and at least one low-pressure gas outlet, the pressure regulating chamber comprising a low-pressure chamber and a high-pressure chamber, the high-pressure chamber and the low-pressure chamber being separated by a valve seat, the high-pressure gas inlet being connected to the high-pressure chamber through a high-pressure air channel, the valve body comprising a flow valve hole paired with the flow regulating mechanism, the inlet of the flow valve hole being connected to the low-pressure chamber through an intermediate air channel; the outlet of the flow valve hole being connected to the corresponding low-pressure gas outlet through a corresponding low-pressure air channel; the flow regulating mechanism comprising a flow valve core and a flow regulating knob for controlling the axial movement of the flow valve core.

[0007] The air pressure regulating valve described above, the diaphragm type air pressure regulating mechanism includes a pressure cap, an air pressure regulating screw, a diaphragm compression spring, a valve core compression spring, a diaphragm and a valve stem. The top surface of the valve body includes a pressure cap hole. The upper end of the low-pressure chamber is connected to the lower part of the pressure cap hole. The low-pressure chamber is arranged above the high-pressure chamber; the pressure cap includes a vertically arranged through hole, and the through hole is a stepped hole that is larger at the bottom and smaller at the top. The small hole of the stepped hole is a threaded hole; the lower part of the pressure cap is fixed in the pressure cap hole, and the diaphragm is pressed between the bottom surface of the pressure cap hole and the bottom surface of the pressure cap. ; The upper end of the air pressure regulating screw includes an air pressure regulating knob, and the air pressure regulating screw is screwed into the threaded hole of the pressure cap stepped hole; the diaphragm compression spring is arranged between the lower end of the air pressure regulating screw and the top surface of the diaphragm; the lower part of the valve stem includes a valve core, and the valve stem passes through the valve seat hole of the valve seat from bottom to top, and the upper end of the valve stem is connected to the middle part of the diaphragm; the upper part of the valve core matches the valve seat hole; the lower end of the valve core includes a spring hole, the upper end of the valve core compression spring is arranged in the spring hole, and the lower end of the valve core compression spring is pressed on the bottom surface of the high-pressure chamber.

[0008] The air pressure regulating valve described above, the top surface of the valve body includes a vertical hole, the flow regulating mechanism includes a flow regulating screw, a flow valve core, a sealing sleeve and a screw sleeve, the top of the flow regulating screw includes the flow regulating knob, and the screw sleeve includes an internal thread and an external thread; the bottom surface of the vertical hole includes the flow valve hole, and the bottom of the flow valve hole is the entrance of the flow valve hole; the vertical hole includes a small hole, an intermediate hole and a threaded hole, the outlet of the flow valve hole is located in the small hole at the lower end of the vertical hole, and the side of the small hole is connected to the low-pressure air duct; above the small hole is the intermediate hole, and the sealing sleeve is arranged in the intermediate hole; above the intermediate hole is a threaded hole, and the flange of the upper end of the sealing sleeve is arranged at the bottom of the threaded hole; the external thread of the screw sleeve is screwed into the threaded hole of the vertical hole and fixed by a locking nut, and the bottom surface of the screw sleeve is pressed on the flange of the top surface of the sealing sleeve; the flow valve core extends into the small hole through the inner hole of the sealing sleeve, the flow regulating screw is screwed into the internal thread of the screw sleeve, and the upper end of the flow valve core is connected to the lower end of the flow regulating screw.

[0009] The air pressure regulating valve described above has a valve body including two pressure gauge interfaces, the first pressure gauge interface is connected to the high-pressure air channel through the first detection air channel, and the second pressure gauge interface is connected to the intermediate air channel through the second detection air channel.

[0010] The air pressure regulating valve mentioned above includes the two flow regulating mechanisms mentioned above, and the valve body includes the two low-pressure gas outlets mentioned above and the two flow valve holes mentioned above.

[0011] In the above-mentioned air pressure regulating valve, the matching surface between the valve core and the valve seat hole is a conical surface.

[0012] The air pressure regulating valve of the utility model can not only regulate the air pressure, but also regulate the output low-pressure gas flow rate to meet the requirements of modern equipment for gas pressure and flow control. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0014] Figure 1 It is a front view of the air pressure regulating valve according to an embodiment of the present utility model.

[0015] Figure 2 It is a top view of the air pressure regulating valve according to an embodiment of the present utility model.

[0016] Figure 3 It is a rear view of the air pressure regulating valve according to an embodiment of the present utility model.

[0017] Figure 4 It is a left view of the air pressure regulating valve according to an embodiment of the present utility model.

[0018] Figure 5 yes Figure 2 AA section view in.

[0019] Figure 6 It is a cross-sectional view of the valve body of an embodiment of the present utility model.

[0020] Figure 7 yes Figure 4 BB cross-section view in.

[0021] Figure 8 It is a three-dimensional diagram of the air pressure regulating valve according to an embodiment of the present utility model.

[0022] Figure 9 It is a three-dimensional diagram of the air pressure regulating valve according to an embodiment of the present utility model from another perspective. DETAILED DESCRIPTION

[0023] The structure and principle of the air pressure regulating valve in the embodiment of the utility model are as follows Figures 1 to 9As shown, the valve body 10 includes a diaphragm-type air pressure regulating mechanism 20 and two flow regulating mechanisms 30. The valve body 10 includes a cap hole 11 for mounting the air pressure regulating mechanism 20, two vertical holes 12 for mounting the flow regulating mechanisms 30, an air pressure regulating chamber, a high-pressure gas inlet 17, two low-pressure gas outlets 18, and two pressure gauge interfaces 19. The cap hole 11 and the two vertical holes 12 are all open on the top surface of the valve body 10. The high-pressure gas inlet 17, the two low-pressure gas outlets 18, and the two pressure gauge interfaces 19 are respectively arranged on different sides of the valve body 10.

[0024] The air pressure regulating chamber includes a low-pressure chamber 13 and a high-pressure chamber 14. The upper end of the low-pressure chamber 13 communicates with the lower portion of the pressure cap hole 11. The low-pressure chamber 13 is arranged above the high-pressure chamber 14, and a valve seat 15 separates the high-pressure chamber 14 from the low-pressure chamber 13. The high-pressure gas inlet 17 communicates with the high-pressure chamber 14 via a high-pressure gas passage 171. The valve body 10 includes a flow valve hole 121 that is paired with the flow regulating mechanism 30. The inlet of the flow valve hole 121 communicates with the low-pressure chamber 13 via an intermediate gas passage 16. The outlet of the flow valve hole 121 communicates with the corresponding low-pressure gas outlet 18 via a corresponding low-pressure gas passage 181.

[0025] The diaphragm-type air pressure regulating mechanism 20 includes a pressure cap 21, an air pressure regulating screw 22, a diaphragm compression spring 24, a valve core compression spring 25, a diaphragm 23, and a valve stem 26. The center of the pressure cap 21 has a vertically arranged through-hole 211. The through-hole 211 is a stepped hole that is larger at the bottom and smaller at the top. The small hole at the top of the stepped hole is a threaded hole. The lower part of the pressure cap 21 is fixed in the pressure cap hole 11, and the two are threadedly connected. The diaphragm 23 is pressed between the bottom surface of the pressure cap hole 11 and the bottom surface of the pressure cap 21. The upper end of the air pressure regulating screw 22 has an air pressure regulating knob 221. The air pressure regulating screw 22 is screwed into and passes through the threaded hole of the stepped hole of the pressure cap 21. The diaphragm compression spring 24 is arranged between the lower end of the air pressure regulating screw 22 and the top surface of the diaphragm 23. A valve core 261 is located at the bottom of the valve stem 26. The valve stem 26 passes through the valve seat hole 151 of the valve seat 15 from bottom to top, and the upper end of the valve stem 26 is connected to the middle of the diaphragm 23. The matching surface between the valve core 261 and the valve seat hole 151 is a conical surface, and the conical surface of the upper part of the valve core 261 matches the conical surface of the valve seat hole 151. The lower end of the valve core 261 has a spring hole. The upper end of the valve core compression spring 25 is arranged in the spring hole, and the lower end of the valve core compression spring 25 is pressed against the spring seat 141 on the bottom surface of the high-pressure chamber 14.

[0026] The flow control mechanism 30 includes a flow control screw 31, a flow valve core 32, a sealing sleeve 33, and a threaded sleeve 34. The flow control screw 31 has a flow control knob 311 at its top, and the threaded sleeve 34 includes both internal and external threads. A flow valve hole 121 is located at the bottom of the vertical hole 12. Below the flow valve hole 121 is the inlet of the flow valve hole 121. From bottom to top, the vertical hole 12 comprises a small hole 122, an intermediate hole 123, and a threaded hole 124. The outlet of the flow valve hole 121 is located in the small hole 122 at the bottom of the vertical hole 12. The side of the small hole 122 is connected to the low-pressure airway 181. Above the small hole 122 is the intermediate hole 123, in which the sealing sleeve 33 is positioned. Above the intermediate hole 123 is the threaded hole 124, with the flange at the top of the sealing sleeve 33 positioned at the bottom of the threaded hole 124. The external threads of the screw sleeve 34 are screwed into the threaded hole 124 of the vertical hole 12 and secured by a lock nut 341. The bottom surface of the screw sleeve 34 presses against the flange on the top surface of the sealing sleeve 33. The flow valve core 32 extends through the inner hole of the sealing sleeve 33 and into the small hole 122. The flow regulating screw 31 is screwed into the internal threads of the screw sleeve 34. The upper end of the flow valve core 32 is connected to the lower end of the flow regulating screw 31. The specific connection method of this embodiment is that the upper end of the flow valve core 32 includes a ridge, and the lower end of the flow regulating screw 31 includes a groove. The ridge at the upper end of the flow valve core 32 is inserted into the groove at the lower end of the flow regulating screw 31 to achieve an embedded connection.

[0027] The first pressure gauge interface 19A is in communication with the high-pressure air channel 171 through the first detection air channel 191 , and the second pressure gauge interface 19B is in communication with the intermediate air channel 16 through the second detection air channel 192 .

[0028] The working process of the air pressure regulating valve of the utility model embodiment can be divided into two steps:

[0029] The first step is to convert the high-pressure gas into gas of specified pressure. The method is as follows: the two pressure gauge interfaces 19 are respectively connected to pressure gauges or pressure transmitters. At this time, the pressure adjustment knob 221 of the diaphragm-type air pressure regulating mechanism 20 is in the counterclockwise closed state. By observing the instrument pressure of the first pressure gauge interface 19A, high-pressure gas is introduced from the inlet. The pressure adjustment knob 221 is slowly rotated clockwise while observing the instrument pressure coefficient of the second pressure gauge interface 19B. When the pressure coefficient reaches the specified pressure, stop rotating the pressure adjustment knob 221. At this time, the output pressure has been set as required.

[0030] The second step is to output the adjusted gas flow rate. The method is as follows: the two low-pressure gas outlets 18 are respectively connected to the flow meter. At this time, the pressure value of the first part is set, and the flow adjustment knob 311 of the flow adjustment mechanism 30 is in a clockwise closed state. By observing the flow value generated by the flow meter, slowly rotate the flow adjustment knob 311 of the first low-pressure gas outlet 18 and the flow adjustment knob 311 of the second low-pressure gas outlet 18 counterclockwise and observe the flow value at the same time. When the flow value reaches the specified flow rate, stop rotating the outlet flow adjustment knob 311. At this time, the flow rate is set as required.

[0031] After the air pressure regulating valve of the embodiment of the present invention completes the first and second steps of setting, the pressure and flow output of the valve are stable. If the demand changes, they can be readjusted according to the first and second methods.

[0032] The special design principle, process and core of the conversion of high-pressure gas to specified pressure gas are as follows: the diaphragm-type air pressure regulating mechanism 20 is in a closed state before pressure regulation, mainly because the valve core is sealed in the outlet channel of the valve seat 15 by the spring force, and at the same time, when the high-pressure gas enters the high-pressure chamber 14, the valve core is supported by the dual force of the spring and the air pressure entering the high-pressure chamber 14, so that the sealing performance is better; the set pressure value output is rotated clockwise to squeeze the spring and increase the elastic force (assuming it increases by 10 bar) to act on the diaphragm to produce deformation and push the valve stem 26, and the valve stem 26 pushes the valve core to leave the valve seat hole 151 to generate a passage. The air pressure of the high-pressure chamber 14 enters the low-pressure chamber 13 through the valve seat hole 151 to form a set pressure (for ease of understanding, it is assumed that the high-pressure gas is 100 bar and the set pressure is 10 bar). After the set pressure enters the low-pressure chamber 13, the pressure reaches 10 bar, which acts on the diaphragm. When the air pressure regulating knob 221 is rotated clockwise to squeeze the spring and increase the elastic force, the diaphragm resets and pulls the valve stem 26 and the valve core, so that the valve core reseals the valve seat hole 151 of the valve seat 15, cutting off the air pressure of the high-pressure chamber 14 from being introduced into the low-pressure chamber 13. At this time, the pressure in the high-pressure chamber 14 is 100 bar, and the pressure in the low-pressure chamber 13 is 10 bar. When intermediate passage 16 and low-pressure airway 181 are in the pressure output state, the pressure in low-pressure chamber 13 will drop. When the pressure in low-pressure chamber 13 is less than the force exerted by the air pressure regulating screw 22 on the diaphragm compression spring 24, the diaphragm lacks sufficient pressure to support its deformation toward the low-pressure chamber 13. This causes the valve stem 26 connected to the diaphragm to push the valve core apart from the valve seat 15's seat hole 151, creating a microchannel. The pressure in high-pressure chamber 14 continuously flows through the microchannel, generating the pressure difference from the low-pressure chamber 13 output, thereby achieving continuous output of gas at the specified pressure. The key to this is that the pressure exerted by the air pressure regulating screw 22 on the diaphragm determines the set output pressure; for example, 10 bar applied results in a 10 bar output.

[0033] In addition to pressure regulation, the air pressure regulating valve of the present invention also has the function of flow regulation. This allows the air pressure regulating valve to flexibly adjust the gas flow according to different application scenarios and needs, thereby improving the adaptability and working efficiency of the equipment.

[0034] The principle and core of flow adjustment are as follows: After the pressure is set as required, pressurized gas enters the intermediate channel 161. At this time, the outlet flow adjustment knob 311 is closed clockwise. To output a suitable flow, adjust the flow counterclockwise according to the scale value. At this time, the flow valve hole 121 and the low-pressure air channel 181 form a flow output. The core is to adjust the scale value, that is, the output flow value.

[0035] The air pressure regulating valve of the utility model embodiment has the following advantages:

[0036] Precisely adjustable pressure:

[0037] The utility model can accurately convert high-pressure gas into gas of the required pressure. The precise pressure regulation capability makes the gas supply more in line with the specific needs of various modern applications and improves the flexibility and adaptability of the system.

[0038] Flow rate is adjustable:

[0039] In addition to pressure regulation, the utility model also has the function of adjusting the flow rate. This means that in different application scenarios, the gas flow rate can be flexibly adjusted according to actual needs, thereby optimizing energy utilization and equipment performance.

[0040] Broaden the scope of application:

[0041] By precisely regulating gas pressure and flow, the gas pressure regulating valve of the present invention broadens the use of high-pressure gas in modern applications. It allows high-pressure gas to directly meet low-pressure requirements without the need for additional pressure-reducing equipment or complex control systems.

[0042] Improve system stability:

[0043] The gas pressure regulating valve of the present invention has not only precise control capabilities but also good stability and reliability, which helps to ensure the continuity and stability of gas supply, reduce system failure rate, and improve the overall system operation efficiency.

[0044] Energy-saving and efficient:

[0045] By precisely regulating gas pressure and flow, the gas pressure regulating valve of the present utility model can reduce unnecessary energy waste and improve energy efficiency, which is of great significance for energy conservation, emission reduction and lowering operating costs.

[0046] Easy to maintain and upgrade:

[0047] The air pressure regulating valve of the present utility model embodiment is compact and easy to maintain. It improves production efficiency and safety. In industrial applications requiring precise control of gas pressure and flow, such as semiconductor manufacturing, food processing, and chemical production, the air pressure regulating valve method of the present utility model embodiment can significantly improve production efficiency and product quality. Furthermore, precise gas control also helps improve system safety and reduce accident risks.

[0048] In summary, the air pressure regulating valve of the present invention has multiple advantages, including precise pressure adjustment, adjustable flow rate, broadened application range, improved system stability, energy efficiency and high efficiency, easy maintenance and upgrade, and improved production efficiency and safety. These advantages make the air pressure regulating valve of the present invention have broad application prospects and market competitiveness in modern applications.

Claims

1. A pressure regulating valve, comprising a valve body and a diaphragm-type pressure regulating mechanism, wherein the valve body comprises a pressure regulating chamber, a high-pressure gas inlet, and at least one low-pressure gas outlet, the pressure regulating chamber comprising a low-pressure chamber and a high-pressure chamber, the high-pressure chamber and the low-pressure chamber being separated by a valve seat, the high-pressure gas inlet being connected to the high-pressure chamber via a high-pressure gas passage, and characterized in that: It includes a flow regulating mechanism corresponding to the low-pressure gas outlet, the valve body includes a flow valve hole paired with the flow regulating mechanism, the inlet of the flow valve hole is connected to the low-pressure chamber through the intermediate air channel; the outlet of the flow valve hole is connected to the corresponding low-pressure gas outlet through the corresponding low-pressure air channel; the flow regulating mechanism includes a flow valve core and a flow regulating knob for controlling the axial movement of the flow valve core.

2. The air pressure regulating valve according to claim 1, characterized in that: The diaphragm type air pressure regulating mechanism includes a pressure cap, an air pressure regulating screw, a diaphragm compression spring, a valve core compression spring, a diaphragm and a valve stem. The top surface of the valve body includes a pressure cap hole. The upper end of the low-pressure chamber is connected to the lower part of the pressure cap hole. The low-pressure chamber is arranged above the high-pressure chamber. The pressure cap includes a vertically arranged through hole. The through hole is a stepped hole with a larger bottom and a smaller top. The small hole of the stepped hole is a threaded hole. The lower part of the pressure cap is fixed in the pressure cap hole. The diaphragm is pressed between the bottom surface of the pressure cap hole and the bottom surface of the pressure cap. The air pressure regulating screw The upper end of the rod includes an air pressure regulating knob, and the air pressure regulating screw is screwed into the threaded hole of the pressure cap stepped hole; the diaphragm compression spring is arranged between the lower end of the air pressure regulating screw and the top surface of the diaphragm; the lower part of the valve stem includes a valve core, and the valve stem passes through the valve seat hole of the valve seat from bottom to top, and the upper end of the valve stem is connected to the middle part of the diaphragm; the upper part of the valve core matches the valve seat hole; the lower end of the valve core includes a spring hole, the upper end of the valve core compression spring is arranged in the spring hole, and the lower end of the valve core compression spring is pressed on the bottom surface of the high-pressure chamber.

3. The air pressure regulating valve according to claim 1, characterized in that: The top surface of the valve body includes a vertical hole, and the flow regulating mechanism includes a flow regulating screw, a flow valve core, a sealing sleeve and a screw sleeve. The top of the flow regulating screw includes the flow regulating knob, and the screw sleeve includes an internal thread and an external thread; the bottom surface of the vertical hole includes the flow valve hole, and the bottom of the flow valve hole is the entrance of the flow valve hole; the vertical hole includes a small hole, an intermediate hole and a threaded hole, and the outlet of the flow valve hole is located in the small hole at the lower end of the vertical hole, and the side of the small hole is connected to the low-pressure airway; above the small hole is the intermediate hole, and the sealing sleeve is arranged in the intermediate hole; above the intermediate hole is a threaded hole, and the flange of the upper end of the sealing sleeve is arranged at the bottom of the threaded hole; the external thread of the screw sleeve is screwed into the threaded hole of the vertical hole and is fixed by a locking nut, and the bottom surface of the screw sleeve is pressed on the flange of the top surface of the sealing sleeve; the flow valve core extends into the small hole through the inner hole of the sealing sleeve, and the flow regulating screw is screwed into the internal thread of the screw sleeve, and the upper end of the flow valve core is connected to the lower end of the flow regulating screw.

4. The air pressure regulating valve according to claim 1, characterized in that: The valve body includes two pressure gauge interfaces, the first pressure gauge interface is connected to the high-pressure air channel through the first detection air channel, and the second pressure gauge interface is connected to the intermediate air channel through the second detection air channel.

5. The air pressure regulating valve according to claim 1, characterized in that: It comprises two of the flow regulating mechanisms, and the valve body comprises two of the low-pressure gas outlets and two of the flow valve holes.

6. The air pressure regulating valve according to claim 2, characterized in that: The matching surface between the valve core and the valve seat hole is a conical surface.

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