Pressure regulating valve

Abstract

The application discloses a pressure regulating valve, which comprises a valve body, the valve body defines a regulating chamber and a fluid channel, the regulating chamber is communicated with the outlet of the fluid channel through a pressure relief channel, the fluid channel has a flow port for connecting the inlet of the fluid channel and the outlet of the fluid channel, a first sealing assembly separates the regulating chamber and the fluid channel, a valve core assembly is used for opening and closing the flow port, the valve core assembly is movably arranged in the valve body and connected with the first sealing assembly, wherein the first sealing assembly comprises a first bellows which is stretchable along the moving direction of the valve core assembly, one end of the first bellows is matched with the valve body and the other end is matched with the valve core assembly. The pressure regulating valve has the advantages of regulating the flow of the fluid medium according to the pressure, avoiding the leakage of the gas in the pressure regulating valve and the like.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically, to a pressure regulating valve. Background Technology

[0002] The pressure regulating valves in the relevant technologies do not have a sealing structure. After the valve is opened, gas can easily flow from the pressure regulating valve to other areas, which is not conducive to the operation of the pressure regulating valve. Summary of the Invention

[0003] In view of this, the present invention aims to provide a pressure regulating valve, which has the advantages of being able to regulate the flow rate of the fluid medium according to the pressure received and preventing gas leakage within the pressure regulating valve.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A pressure regulating valve includes: a valve body defining a regulating chamber and a fluid passage, the regulating chamber being connected to the outlet of the fluid passage via a pressure relief passage, the fluid passage having a flow port for connecting the inlet and outlet of the fluid passage; a first sealing assembly separating the regulating chamber and the fluid passage; and a valve core assembly for opening and closing the flow port, the valve core assembly being movably disposed within the valve body and connected to the first sealing assembly, wherein the first sealing assembly includes a first bellows retractable along the moving direction of the valve core assembly, one end of the first bellows engaging with the valve body and the other end engaging with the valve core assembly.

[0006] In addition, the pressure regulating valve according to the above embodiments of the present invention may also have the following additional technical features:

[0007] According to some embodiments of the present invention, the first sealing assembly further includes: a first connecting disc, the first connecting disc being fixed in the valve body, one end of the first bellows being connected to the first connecting disc, wherein the adjusting chamber is provided with a first fixing flange, the first fixing flange being fixed in the adjusting chamber by a first fastener, so as to clamp the first connecting disc between the first fixing flange and the valve body.

[0008] According to some embodiments of the present invention, the valve body further defines a receiving cavity, and the pressure regulating valve further includes: a deformable diaphragm disposed in the valve body and separating the receiving cavity from the regulating chamber; and an regulating assembly movably disposed in the receiving cavity, wherein the regulating assembly and the valve core assembly respectively cooperate with opposite sides of the diaphragm.

[0009] In some embodiments, the valve core assembly includes: a valve core for opening and closing the flow port; a push rod, one end of which is connected to the valve core, a first bellows sleeved on the outside of the push rod, and the other end of the first bellows connected to the valve core or the push rod; and a first abutment, the first abutment being connected to the other end of the push rod and abutting against the diaphragm.

[0010] In some examples, the valve core includes: a valve core body; a clamping member and a sealing gasket, the clamping member being threadedly engaged with the valve core body to clamp the sealing gasket between the valve core body and the clamping member, wherein the sealing gasket has a sealing protrusion that seals against one side surface of the flow port.

[0011] According to some embodiments of the present invention, a reset member is provided in the fluid channel, the reset member being connected between the inner wall of the valve body and the valve core assembly to drive the valve core assembly to move in the direction of closing the flow port.

[0012] According to some embodiments of the present invention, the pressure regulating valve further includes a second sealing assembly, which is connected to the valve body and the regulating assembly respectively.

[0013] In some embodiments, the second sealing assembly includes: a second bellows, which is sleeved on the outside of the adjusting assembly and is telescopic along the moving direction of the adjusting assembly, one end of the second bellows being connected to the adjusting assembly; and a second connecting disc, which is fixed in the valve body and connected to the other end of the second bellows.

[0014] In some embodiments, the adjusting assembly includes: a movable rod defining a mounting cavity extending axially thereon; an adjusting rod having one end extending into the mounting cavity and engaging with the movable rod, and the other end extending out of the valve body and connected to an adjusting nut; and a ball bearing disposed within the mounting cavity, the surface of the ball bearing contacting and engaging with the bottom wall of the mounting cavity and the one end of the adjusting rod.

[0015] In some examples, the adjustment assembly further includes: a connecting joint connected to one end of the moving rod; an elastic element, one end of which engages with the connecting joint; and a second abutment engaged with the other end of the elastic element and abutting against the diaphragm.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of a pressure regulating valve according to an embodiment of the present invention.

[0019] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0020] Figure 3 This is a schematic diagram of the structure of a pressure regulating valve according to another embodiment of the present invention.

[0021] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0022] Figure 5 yes Figure 3 Enlarged view of point C in the middle.

[0023] Explanation of reference numerals in the attached diagram: Pressure regulating valve 1,

[0024] Valve body 100, regulating chamber 110, pressure relief passage 111, fluid passage 120, flow port 121, inlet 122, outlet 123, receiving cavity 130, first boss 140, second boss 150, third boss 160.

[0025] First sealing assembly 200, first bellows 210, first connecting plate 220, first fixed flange 230, first fastener 240, first gasket 250

[0026] Valve core assembly 300, valve core 310, valve core body 311, clamping element 312, sealing gasket 313, sealing protrusion 3131, push rod 320, first push head 330.

[0027] Diaphragm 410, reset element 420, adjusting nut 430, valve cover 440, anti-loosening washer 450

[0028] Moving rod 510, mounting cavity 511, adjusting rod 520, ball bearing 530, connecting joint 540, elastic element 550, second top head 560, first limiting element 571, second limiting element 572.

[0029] Second sealing assembly 600, second bellows 610, second connecting disc 620. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0031] The following will refer to Figures 1-5 The present invention will be described in detail with reference to the embodiments.

[0032] The pressure regulating valve 1 according to an embodiment of the present invention includes a valve body 100, a first sealing assembly 200, and a valve core assembly 300.

[0033] The valve body 100 defines a regulating chamber 110 and a fluid passage 120. The regulating chamber 110 and the outlet 123 of the fluid passage 120 are connected through a pressure relief passage 111. The pressure relief passage 111 facilitates the balancing of the air pressure in the regulating chamber 110 and prevents the air pressure in the regulating chamber 110 from being too high or too low. Specifically, when the air pressure in the regulating chamber 110 is too high, the gas in the regulating chamber 110 can be discharged through the pressure relief passage 111; when the air pressure in the regulating chamber 110 is too low, external gas can enter the regulating chamber 110 through the pressure relief passage 111.

[0034] The fluid passage 120 has a flow port 121 for connecting the inlet 122 and the outlet 123 of the fluid passage 120 to guide the flow of the fluid medium. The fluid medium can enter the valve body 100 from the inlet 122 of the fluid passage 120 and flow out of the pressure regulating valve 1 from the outlet 123 of the fluid passage 120 along the flow port 121.

[0035] The first sealing assembly 200 separates the regulating chamber 110 from the fluid passage 120 to prevent the medium in the fluid passage 120 from flowing into the regulating chamber 110. For example, when the pressure regulating valve 1 is used to control the flow of cryogenic gas, the first sealing assembly 200 can prevent cryogenic gas from flowing into the regulating chamber 110 from the fluid passage 120, thus preventing it from affecting the operation of the regulating chamber 110.

[0036] The valve core assembly 300 is used to open and close the flow port 121. The valve core assembly 300 is movably disposed in the valve body 100 to open or close the flow port 121 and control the flow rate of the fluid medium through the flow port 121.

[0037] In some embodiments, such as Figure 1 As shown, when the fluid medium passes through the flow port 121 with a large driving force, and this driving force is sufficient to drive the valve core assembly 300 to open the flow port 121, the fluid medium can pass through the fluid channel 120. When the fluid medium passes through the flow port 121 with a small driving force, and this driving force is insufficient to drive the valve core assembly 300 to open the flow port 121, the valve core assembly 300 closes the flow port 121, and the fluid medium cannot flow from the inlet 122 to the outlet 123 of the fluid channel 120.

[0038] When the driving force on the valve core assembly 300 is large, allowing it to fully open the flow port 121, the flow rate of the fluid medium through the flow port 121 is large. Conversely, when the driving force on the valve core assembly 300 is small, allowing it to only partially open the flow port 121, the flow rate of the fluid medium through the flow port 121 is small. By controlling the driving force on the valve core assembly 300, the flow rate of the fluid medium through the flow port 121 can be regulated.

[0039] In other embodiments, such as Figure 3 As shown, when the fluid medium passes through the flow port 121 with a small driving force, the valve core assembly 300 opens the flow port 121. When the driving force of the fluid medium through the flow port 121 gradually increases, the valve core assembly 300 closes the flow port 121.

[0040] In addition, the valve core assembly 300 is connected to the first sealing assembly 200 to prevent fluid medium from entering the valve core assembly 300 and to prevent leakage of fluid medium from affecting the operation of the valve core assembly 300.

[0041] The first sealing assembly 200 includes a first bellows 210 that is retractable along the moving direction of the valve core assembly 300. One end of the first bellows 210 is engaged with the valve body 100 and the other end is engaged with the valve core assembly 300, so as to ensure the relative sealing of the valve core assembly 300 without affecting the movement of the valve core assembly 300, and to prevent fluid medium from entering the valve core assembly 300.

[0042] Therefore, the pressure regulating valve 1 according to the embodiments of the present invention has advantages such as being able to regulate the flow rate of the fluid medium according to the pressure received and preventing gas leakage within the pressure regulating valve 1.

[0043] The pressure regulating valve 1 according to a specific embodiment of the present invention is described below with reference to the accompanying drawings.

[0044] like Figures 1-5 As shown, the pressure regulating valve 1 according to an embodiment of the present invention includes a valve body 100, a first sealing assembly 200, and a valve core assembly 300.

[0045] In some embodiments of the present invention, the first sealing assembly 200 further includes a first connecting plate 220, which is fixed inside the valve body 100. One end of the first bellows 210 is connected to the first connecting plate 220, and the other end is connected to the valve core assembly 300, so as to separate the fluid channel 120 from the valve core assembly 300 and separate the fluid channel 120 from the regulating chamber 110, thereby preventing the fluid medium in the fluid channel 120 from entering the regulating chamber 110 and the valve core assembly 300.

[0046] The regulating chamber 110 is provided with a first fixed flange 230, which is fixed in the regulating chamber 110 by a first fastener 240 to clamp the first connecting plate 220 between the first fixed flange 230 and the valve body 100, thereby fixing the position of the first connecting plate 220 and preventing the first connecting plate 220 from moving when the valve core assembly 300 moves, so that the fluid medium flows into the regulating chamber 110 from the first connecting plate 220.

[0047] In some embodiments, such as Figure 2 As shown, a first boss 140 is formed in the middle of the valve body 100, and a first connecting plate 220 is positioned above the first boss 140 (vertically as shown). Figure 1 As shown, it should be understood that the above directional limitation is only for the convenience of describing the attached drawings and does not limit the actual setting position and direction of the pressure regulating valve 1. The first fixed flange 230 is located above the first connecting plate 220, and the diameter of the first fixed flange 230 is slightly larger than that of the first connecting plate 220.

[0048] Furthermore, the adjustment chamber 110 is provided with a plurality of first fasteners 240, which may be screws. The first fasteners 240 are connected to the first boss 140 by thread engagement to fix the first fixing flange 230 at the upper position on the first boss 140, thereby fixing the first connecting plate 220 between the first fixing flange 230 and the first boss 140, and preventing the first connecting plate 220 from moving within the adjustment chamber 110.

[0049] In addition, a first gasket 250 may be provided between the first connecting plate 220 and the first boss 140 to prevent fluid medium from flowing into the regulating chamber 110 from the gap between the first connecting plate 220 and the first boss 140.

[0050] In some embodiments of the present invention, the valve body 100 further defines a receiving cavity 130, and the pressure regulating valve 1 further includes a deformable diaphragm 410 and a regulating assembly. The diaphragm 410 is disposed on the valve body 100 and separates the receiving cavity 130 from the regulating chamber 110 to prevent air in the receiving cavity 130 from entering the regulating chamber 110, so as to ensure relative sealing within the regulating chamber 110.

[0051] When cryogenic gas flows through the fluid channel 120, the first sealing component 200 can prevent cryogenic gas from entering the regulating chamber 110, thus preventing the cryogenic gas from affecting the diaphragm 410 and extending the service life of the diaphragm 410.

[0052] The adjustment component is movably disposed within the receiving cavity 130. The adjustment component and the valve core assembly 300 are respectively engaged with the opposite sides of the diaphragm 410. The user can adjust the degree of deformation of the diaphragm 410 through the adjustment component to adjust the initial pressure above the diaphragm 410.

[0053] In some embodiments, when the driving force below the diaphragm 410 is greater than the initial pressure above the diaphragm 410, the valve core assembly 300 can be moved upward and the flow port 121 can be opened. When the driving force below the diaphragm 410 is less than the initial pressure above the diaphragm 410, the valve core assembly 300 can be moved downward and the flow port 121 can be closed.

[0054] In other embodiments, when the driving force below the diaphragm 410 is less than the initial pressure above the diaphragm 410, the valve core assembly 300 can be moved downwards and the flow port 121 can be opened. When the driving force below the diaphragm 410 is greater than the initial pressure above the diaphragm 410, the valve core assembly 300 can be moved upwards and the flow port 121 can be closed.

[0055] In some optional embodiments of the present invention, the valve core assembly 300 includes a valve core 310 and a push rod 320. The valve core 310 is used to open and close the flow port 121. One end of the push rod 320 is connected to the valve core 310. A first bellows 210 is sleeved on the outside of the push rod 320. One end of the first bellows 210 is connected to the first connecting plate 220. The other end of the first bellows 210 is connected to the valve core 310 or the push rod 320 to ensure relative sealing of the push rod 320 inside the first bellows 210, and to prevent the fluid medium in the fluid channel 120 from entering the regulating chamber 110 from the position of the push rod 320.

[0056] Furthermore, the valve core assembly 300 also includes a first push head 330, which is connected to the other end of the push rod 320 and abuts against the diaphragm 410. When the push rod 320 moves, it can drive the first push head 330 to move, and the first push head 330 can apply a certain compressive force to the diaphragm 410.

[0057] In some embodiments, such as Figure 2 As shown, the valve core 310 has a first connecting groove in the middle, the lower end of the push rod 320 is engaged with the first connecting groove, the first push head 330 has a second connecting groove in the middle, and the upper end of the push rod 320 is engaged with the second connecting groove.

[0058] Specifically, the lower end of the push rod 320 extends into the first connecting groove and is threaded into the first connecting groove, while the upper end of the push rod 320 extends into the second connecting groove and is threaded into the second connecting groove. In this way, the valve core 310, the push rod 320, and the first push head 330 are connected and engaged, allowing them to move synchronously.

[0059] When the first head 330 moves, it exerts a certain compressive force on the diaphragm 410 and can cause the diaphragm 410 to deform. The upper end of the first head 330 is formed into an arc surface, which is matched with the diaphragm 410 to prevent the first head 330 from puncturing the diaphragm 410 and causing damage to the diaphragm 410.

[0060] In some specific embodiments of the present invention, the valve core 310 includes a valve core body 311, a clamping member 312 and a sealing gasket 313. The clamping member 312 is threadedly engaged with the valve core body 311, thereby clamping the sealing gasket 313 between the valve core body 311 and the clamping member 312.

[0061] The sealing gasket 313 has a sealing protrusion 3131 that seals against one side surface of the flow port 121, so as to seal the flow port 121 when the valve core 310 closes the flow port 121, thereby preventing the fluid medium from passing through the flow port 121.

[0062] In some embodiments, such as Figure 1 , Figure 2 As shown, the valve body 100 forms a second boss 150 within the fluid passage 120, and the sealing gasket 313 and the clamping member 312 are positioned above the second boss 150. The valve core body 311 has a downward mating surface in the middle, the sealing gasket 313 is elastically deformable, the sealing gasket 313 is positioned below the mating surface, and the clamping member 312 is positioned below the sealing gasket 313 and is threadedly connected to the valve core body 311.

[0063] The sealing gasket 313 is fixed in position by the clamping member 312 and the mating table. When the valve core 310 closes the flow port 121, the sealing protrusion 3131 on the lower surface of the seal engages with the upper surface of the second protrusion 150 to seal the flow port 121 and prevent the fluid medium from passing through it. At this time, when the driving force of the fluid medium through the fluid channel 120 is greater than the initial pressure, the valve core assembly 300 can be driven to move upward to open the flow port 121.

[0064] In addition, by sealing the flow port 121 through the cooperation of the sealing protrusion 3131 and the second protrusion 150, it is possible to prevent the valve core body 311 or the clamping member 312 from scraping the upper surface of the second protrusion 150.

[0065] In other embodiments, such as Figure 3 , Figure 5As shown, the valve body 100 forms a second boss 150 within the fluid passage 120, and the sealing gasket 313 and the clamping member 312 are disposed below the second boss 150. The valve core body 311 has an upwardly oriented mating surface in the middle, the sealing gasket 313 is disposed above the mating surface, and the clamping member 312 is disposed above the sealing gasket 313 and is threadedly connected to the valve core body 311.

[0066] The sealing gasket 313 is fixed in position by the clamping member 312 and the mating table. When the valve core 310 closes the flow port 121, the upper surface of the seal forms an upwardly extending sealing protrusion 3131 that abuts against the lower surface of the second protrusion 150 to close the flow port 121 and prevent the fluid medium from passing through it. At this time, when the driving force of the fluid medium through the fluid channel 120 is less than the initial pressure, the valve core assembly 300 moves downward and opens the flow port 121.

[0067] In some embodiments of the present invention, a reset member 420 is provided in the fluid channel 120. The reset member 420 is connected between the inner wall of the valve body 100 and the valve core assembly 300 to drive the valve core assembly 300 to move in the direction of closing the flow port 121. Under certain conditions, it can drive the valve core assembly 300 to return to its original position and re-seal the flow port 121.

[0068] In some embodiments of the present invention, the pressure regulating valve 1 further includes a second sealing assembly 600, which is connected to the valve body 100 and the regulating assembly respectively to ensure the relative sealing of the receiving cavity 130 and prevent external gas or other fluids from entering the receiving cavity 130.

[0069] In some optional embodiments of the present invention, the second sealing assembly 600 includes a second bellows 610 and a second connecting disc 620. The second connecting disc 620 is fixed inside the valve body 100. The second bellows 610 is sleeved on the outside of the adjusting assembly and is telescopic along the moving direction of the adjusting assembly. One end of the second bellows 610 is connected to the adjusting assembly, and the other end is connected to the second connecting disc 620, so as to ensure relative sealing within the receiving cavity 130 without affecting the movement of the adjusting assembly.

[0070] In some embodiments, such as Figure 3 , Figure 4 As shown, a third boss 160 is formed on the upper part of the valve body 100, and a valve cover 440 is provided on the upper part of the valve body 100. The valve cover 440 is connected to the valve body 100 by a threaded connection to fix the valve cover 440 above the third boss 160. The second connecting plate 620 is disposed between the third boss 160 and the valve cover 440, and the position of the second connecting plate 620 can be fixed by the valve cover 440 and the third boss 160.

[0071] The second bellows 610 is located on the outside of the adjustment assembly. One end is connected to the second connecting plate 620, and the other end is connected to the adjustment assembly. In addition, a second gasket can be provided between the second connecting plate 620 and the third boss 160 to ensure the relative sealing of the receiving cavity 130 and prevent external air or other substances from entering the receiving cavity 130.

[0072] In some optional embodiments of the present invention, the adjusting assembly includes a moving rod 510, an adjusting rod 520, and a ball 530. The moving rod 510 defines a mounting cavity 511 extending axially therein. One end of the adjusting rod 520 extends into the mounting cavity 511 and engages with the moving rod 510. The other end of the adjusting rod 520 extends out of the valve body 100 and is connected to the adjusting nut 430. The ball 530 is disposed in the mounting cavity 511. The surface of the ball 530 contacts and engages with the bottom wall of the mounting cavity 511 and one end of the adjusting rod 520, facilitating operation of the adjusting nut 430 by the user from outside the valve body 100, and driving the movement of the adjusting assembly through the adjusting nut 430.

[0073] The adjusting nut 430 and the adjusting rod 520 can be threaded together. The adjusting nut 430 is located above the valve cover 440, and an anti-loosening washer 450 is provided between the adjusting nut 430 and the valve cover 440 to prevent the adjusting nut 430 from falling off the valve cover 440.

[0074] Specifically, the user can rotate the adjusting nut 430 to move the adjusting rod 520, and the adjusting rod 520 drives the moving rod 510 to move via the ball bearing 530. The ball bearing 530 is provided between the adjusting rod 520 and the moving rod 510 to facilitate the even transmission of power from the adjusting rod 520 to the moving rod 510, thereby driving the movement of the moving rod 510.

[0075] In addition, the ball 530 is spherical. When the user rotates the adjusting nut 430, it may cause the adjusting rod 520 to rotate at a certain angle. The ball 530 can dissipate the rotational force of the adjusting rod 520 and prevent the adjusting rod 520 from causing the moving rod 510 to rotate. This is conducive to the adjusting rod 520 smoothly driving the moving rod 510 to move.

[0076] In some embodiments, the mounting cavity 511 is further provided with a first limiting member 571 and a second limiting member 572. The first limiting member 571 is positioned above the second limiting member 572, and the lower end of the first limiting member 571 abuts against the upper end of the second limiting member 572. The first limiting member 571 has an external thread and is threadedly connected to the moving rod 510. The second limiting member 572 has an internal thread and is threadedly connected to the adjusting rod 520, so that when the adjusting rod 520 moves in the vertical direction, it can stably drive the moving rod 510 to move in the same direction.

[0077] In some specific embodiments of the present invention, the adjusting assembly further includes a connecting joint 540, an elastic element 550, and a second top 560. The connecting joint 540 is connected to one end of the moving rod 510, one end of the elastic element 550 cooperates with the connecting joint 540, and the second top 560 cooperates with the other end of the elastic element 550 and abuts against the diaphragm 410. When the moving rod 510 moves, it can drive the connecting joint 540 to move, and at the same time drive the elastic element 550 to compress or stretch, so that the second top 560 abuts against the diaphragm 410 with a larger or smaller force, thereby adjusting the initial pressure on the valve core assembly 300.

[0078] When the second head 560 moves, it exerts a certain compressive force on the diaphragm 410 and causes the diaphragm 410 to deform. The end of the second head 560 that mates with the diaphragm 410 is formed into an arc surface, which abuts against the diaphragm 410 to prevent the second head 560 from puncturing the diaphragm 410 and causing damage to the diaphragm 410 when it moves.

[0079] In use, the user can rotate the adjusting nut 430 to move the adjusting rod 520 up and down. When the adjusting rod 520 moves down, it drives the moving rod 510 down through the ball 530. The moving rod 510 can drive the connecting joint 540 down and squeeze the elastic element 550. At this time, the elastic element 550 has a downward pressure on the second top head 560. The second top head 560 creates an initial downward pressure on the first top head 330 through the diaphragm 410.

[0080] It should be noted that the user can control the distance the adjusting rod 520 moves by adjusting the adjusting nut 430, thereby controlling the initial pressure exerted by the second mandrel 560 on the first mandrel 330. In other words, the user can adjust the magnitude of the initial pressure on the valve core assembly 300 by adjusting the adjusting nut 430.

[0081] In embodiments where the sealing gasket 313 and the clamping member 312 are disposed above the second boss 150, such as Figure 1 , Figure 2 As shown, when the driving force of the fluid medium in the fluid channel 120 is greater than the initial pressure, the force above the diaphragm 410 is less than the force below the diaphragm 410. The elastic element 550 is compressed upward and drives the second top head 560 to move upward. At the same time, the driving force drives the valve core assembly 300 to move upward and the reset element 420 is stretched upward. At this time, the valve core body 311 opens the flow port 121.

[0082] When the driving force of the fluid medium in the fluid channel 120 gradually decreases and falls below the initial pressure, the force above the diaphragm 410 is greater than the force below the diaphragm 410. The elastic element 550 returns to its original deformation downwards, causing the second push head 560 to move downwards. At the same time, the reset element 420 returns to its original deformation downwards. Driven by the reset element 420 and the second push head 560, the valve core 310, the push rod 320, and the first push head 330 gradually move downwards, and the valve core body 311 closes the flow port 121 again.

[0083] In other words, by reducing the driving force of the fluid medium through the fluid channel 120, the valve core assembly 300 can be moved downward to close the flow port 121.

[0084] In embodiments where the sealing gasket 313 and the clamping member 312 are located below the second boss 150, such as Figure 3 , Figure 5 As shown, when the driving force of the fluid medium in the fluid channel 120 is less than the initial pressure, the force above the diaphragm 410 is greater than the force below the diaphragm 410. The elastic element 550 is stretched downward and drives the second top head 560 to push the valve core assembly 300 downward, while compressing the reset element 420. At this time, the valve core body 311 opens the flow port 121.

[0085] When the driving force of the fluid medium in the fluid channel 120 gradually increases and exceeds the initial pressure, the force above the diaphragm 410 is less than the force below the diaphragm 410. The elastic element 550 recovers its deformation upward and drives the second top head 560 to move upward. The reset element 420 recovers its deformation upward. Driven by the reset element 420 and the driving force, the valve core assembly 300 gradually moves upward, and the valve core 310 closes the flow port 121 again.

[0086] In other words, by increasing the driving force of the fluid medium through the fluid channel 120, the valve core assembly 300 can be moved upward to close the flow port 121.

[0087] Other configurations and operations of the pressure regulating valve 1 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0088] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, "above" or "below" a second feature may include direct contact between the first and second features, or it may include contact between the first and second features not being in direct contact but through another feature between them.

[0089] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0090] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0091] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pressure regulating valve (1) characterized in that, include: A valve body (100) defines a regulating chamber (110) and a fluid passage (120). The regulating chamber (110) is connected to the outlet (123) of the fluid passage (120) via a pressure relief passage (111) for balancing the air pressure in the regulating chamber. The fluid passage (120) has an outlet (121) for connecting the inlet (122) of the fluid passage (120) and the outlet (123) of the fluid passage (120). A first sealing assembly (200) separates the regulating chamber (110) from the fluid passage (120); A valve core assembly (300) for opening and closing the flow port (121), the valve core assembly (300) being movably disposed within the valve body (100) and connected to the first sealing assembly (200), The first sealing assembly (200) includes a first bellows (210) that is retractable along the moving direction of the valve core assembly (300), one end of the first bellows (210) engaging with the valve body (100) and the other end engaging with the valve core assembly (300). The first sealing assembly (200) further includes: A first connecting disc (220) is fixed inside the valve body (100), and one end of the first bellows (210) is connected to the first connecting disc (220). The regulating chamber (110) is provided with a first fixed flange (230), which is fixed in the regulating chamber (110) by a first fastener (240) so as to clamp the first connecting plate (220) between the first fixed flange (230) and the valve body (100). The fluid channel (120) is provided with a reset member (420), which is connected between the inner wall of the valve body (100) and the valve core assembly (300) to drive the valve core assembly (300) to move in the direction of closing the flow port (121); The pressure regulating valve (1) also includes: Deformable diaphragm (410). When the driving force below the diaphragm (410) is less than the initial pressure above the diaphragm (410), the valve core assembly (300) is driven to move downward and open the flow port (121); when the driving force below the diaphragm (410) is greater than the initial pressure above the diaphragm (410), the valve core assembly (300) is driven to move upward and close the flow port (121).

2. Pressure regulating valve (1) according to claim 1, characterized in that The valve body (100) further defines a receiving cavity (130), and the diaphragm (410) is disposed on the valve body (100) and separates the receiving cavity (130) from the regulating chamber (110); An adjustment component is movably disposed within the receiving cavity (130), and the adjustment component and the valve core assembly (300) respectively cooperate with the opposite sides of the diaphragm (410).

3. The pressure regulating valve (1) according to claim 1, characterized in that The valve core assembly (300) includes: Valve core (310), the valve core (310) is used to open and close the flow port (121); A push rod (320) is provided, one end of which is connected to the valve core (310). A first bellows (210) is sleeved on the outside of the push rod (320), and the other end of the first bellows (210) is connected to the valve core (310) or the push rod (320). A first pusher (330) is connected to the other end of the push rod (320) and abuts against the diaphragm (410).

4. Pressure regulating valve (1) according to claim 3, characterized in that The valve core (310) includes: Valve core body (311); A clamping element (312) and a sealing gasket (313) are provided, wherein the clamping element (312) is threadedly engaged with the valve core body (311) to clamp the sealing gasket (313) between the valve core body (311) and the clamping element (312). The sealing gasket (313) has a sealing protrusion (3131) that seals against one side surface of the outlet (121).

5. The pressure regulating valve (1) according to claim 2, characterized in that The pressure regulating valve (1) further includes a second sealing assembly (600), which is connected to the valve body (100) and the regulating assembly respectively.

6. Pressure regulating valve (1) according to claim 5, characterized in that The second sealing assembly (600) includes: The second bellows (610) is sleeved on the outside of the adjusting assembly and is telescopic along the moving direction of the adjusting assembly. One end of the second bellows (610) is connected to the adjusting assembly. The second connecting plate (620) is fixed inside the valve body (100) and is connected to the other end of the second bellows (610).

7. Pressure regulating valve (1) according to claim 5, characterized in that The adjustment component includes: A movable rod (510) defines a mounting cavity (511) extending axially therein. Adjusting rod (520), one end of which extends into the mounting cavity (511) and cooperates with the moving rod (510), and the other end of which extends out of the valve body (100) and is connected to the adjusting nut (430); A ball (530) is disposed in the mounting cavity (511), and the surface of the ball (530) is in contact with the bottom wall of the mounting cavity (511) and one end of the adjusting rod (520).

8. Pressure regulating valve (1) according to claim 7, characterized in that The adjustment component further includes: A connecting joint (540) is connected to one end of the moving rod (510); An elastic element (550) is provided, one end of which engages with the connecting joint (540). The second abutment (560) engages with the other end of the elastic member (550) and abuts against the diaphragm (410).

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