A pressure stabilizing valve

Abstract

The present invention discloses a pressure-stabilizing valve, comprising a valve body, wherein the valve body has a first channel, a second channel, and a third channel inside; the third channel has a bottom end and a top end; the first channel includes a first outlet end connected to the third channel, the second channel includes a second inlet end connected to the third channel, the second inlet end is higher than the first outlet end, so that a medium flows through the first channel, enters the third channel through the first outlet end, moves in the third channel in a direction from the bottom end toward the top end, and enters the second channel through the second inlet end; a control part, a part of which is arranged on the valve body, and the other part passes through the top end and is movably arranged in the third channel to control the connection and disconnection between the first channel and the second channel. When the control part controls the connection between the first channel and the second channel, the medium pushes the control part away from the bottom end during the flow process. The present invention can meet the requirement that no vacuum area will be generated in the circulation channel under large flow conditions, so that the circulation channel will not close automatically under large flow conditions and high flow rates.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure stabilizing valves, and in particular to a pressure stabilizing valve. Background Art

[0002] The pilot-operated pressure reducing valve adjusts the flow of the medium by controlling the opening of the opening and closing parts in the valve body to reduce the pressure of the medium. At the same time, it adjusts the opening of the opening and closing parts with the help of the pressure after the valve, so that the pressure after the valve is kept within a certain range, and when the inlet pressure is constantly changing, the outlet pressure is kept within the set range.

[0003] In the existing technology, especially in the fuel control of natural gas engines, the horsepower of the current engines is getting stronger and stronger, and the flow demand for the pressure-stabilizing valve is also getting stronger and stronger. When the medium in the existing pressure-stabilizing valve flows, it will flow in the direction of the control component (electromagnetic drive device) to close the flow channel. When the flow rate increases, a vacuum area will be generated at the bottom of the control component, resulting in an internal pressure imbalance. The control component moves toward the vacuum area with low pressure, thereby causing the flow channel to be closed, that is, it cannot adapt to the needs of large flow and high flow rate.

[0004] Therefore, it is necessary to provide a new pressure-stabilizing valve to solve the above-mentioned problems in the prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide a pressure stabilizing valve for use in the fuel control field of natural gas engines, which can meet the requirement that no vacuum area will be generated in the flow channel under large flow conditions, so that the flow channel will not close automatically under large flow and high flow rate.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] A pressure stabilizing valve comprises a valve body, wherein the valve body has a first channel, a second channel and a third channel therein; the third channel has a bottom end and a top end;

[0008] The first channel includes a first outlet end communicating with the third channel, and the second channel includes a second inlet end communicating with the third channel, wherein the second inlet end is higher than the first outlet end, so that the medium flows through the first channel, enters the third channel through the first outlet end, moves in the third channel in a direction from the bottom end toward the top end, and enters the second channel through the second inlet end;

[0009] A control part is partially provided on the valve body, and another part passes through the top end and is movably provided in the third channel to control the connection or disconnection between the first channel and the second channel. When the control part controls the connection between the first channel and the second channel, the medium pushes the control part away from the bottom end during the flow process.

[0010] By adopting the above technical solution, by setting the second inlet end higher than the first outlet end, the medium can move from bottom to top in the third channel and enter the second channel. Since a portion of the control unit passes through the top end and is movably disposed in the third channel, during the flow of the medium, the medium pushes the portion of the control unit movably disposed in the third channel, exerting a thrust thereon. During the flow of the medium, no vacuum area is generated at the bottom of the portion of the control unit movably disposed in the third channel. In other words, the high flow rate of the medium will not cause the portion of the control unit movably disposed in the third channel to move toward the first channel, thereby closing the first and second channels. This enables the pressure-stabilizing valve to adapt to high-flow and high-speed operation.

[0011] Optionally, the control unit includes:

[0012] a control assembly comprising a fixed member, a first movable member, and a second movable member sequentially disposed in the third passage, wherein the fixed member is close to the top end and fixed to the valve body; and the first movable member and the second movable member are movably disposed in the third passage;

[0013] The driving assembly is provided on the valve body and is used for driving the first moving member and the second moving member to move so as to close or open the second inlet end.

[0014] Optionally, the fixed member, the first movable member and the second movable member are all made of iron-containing materials;

[0015] The driving component includes a coil, which is sleeved on the control component and is used to magnetize the fixed member, the first movable member and the second movable member to make the first movable member and / or the second movable member move relative to the fixed member.

[0016] Optionally, the third channel is divided into an upper cavity area, a lower cavity area and an air supply area in sequence from the top end toward the bottom end;

[0017] The second movable member is provided with a flow guide channel for connecting the upper chamber area and the air supply area; the second movable member is also provided with a pressure relief channel for connecting the upper chamber area and the second channel;

[0018] When the pressures in the upper chamber area, the lower chamber area, and the air supply area are the same, the driving assembly magnetizes the fixed member, the first movable member, and the second movable member, and the fixed member attracts the first movable member and the second movable member to move, so that the first channel is connected to the second channel;

[0019] When the pressure in the upper chamber area and the lower chamber area is greater than the pressure in the air supply area, the driving assembly magnetizes the fixed part, the first movable part and the second movable part, the fixed part adsorbs the first movable part and moves, the medium in the upper chamber area is transferred to the second channel along with the pressure relief channel, and the medium in the first channel pushes the second movable part to move, so that the first channel is connected to the second channel.

[0020] Optionally, the diameter of the pressure relief channel is larger than the diameter of the flow guide channel.

[0021] Optionally, a protrusion is provided on the top of the second movable member, and the pressure relief channel passes through the protrusion;

[0022] A first sealing member is provided at the bottom of the first moving member. The first sealing member corresponds to the position of the protrusion so as to close the pressure relief channel when the first moving member contacts the second moving member.

[0023] Optionally, at least part of the guide channel is not coaxial with the pressure relief channel, and at least part of the guide channel passes through the top of the second movable member; when the first movable member contacts or separates from the second movable member, the guide channel is connected to the upper cavity area.

[0024] Optionally, a second sealing member is provided at the bottom of the second movable member;

[0025] The bottom of the second movable member is provided with a mounting hole, which is coaxial with the second movable member and connected to the guide channel; a connecting member is detachably provided in the mounting hole, and the connecting member is connected to the mounting hole after passing through the second sealing member; a connecting channel is opened through the connecting member, so that after the connecting member is connected to the mounting hole, the guide channel is connected to the air supply area through the connecting channel.

[0026] Optionally, the pressure relief channel has a first pressure relief area, a connecting area, and a second pressure relief area that are sequentially connected;

[0027] The first pressure relief area is coaxial with the second moving member, and one end of the first pressure relief area is in communication with the upper chamber area;

[0028] The second pressure relief area is provided on a side wall of the second movable member and is in communication with the second channel;

[0029] One end of the connecting area is connected to the other end of the first pressure relief area, and the other end is connected to the second pressure relief area, so that the first pressure relief area and the second pressure relief area are connected;

[0030] The diameters of the first pressure relief area and the connecting area are both larger than the diameter of the guide channel.

[0031] Optionally, also include:

[0032] a guide ring disposed around the second moving member and covering a portion of the second pressure relief area, so that the second pressure relief area and the bottom of the guide ring form a pressure relief outlet for flowing the medium;

[0033] The diameter of the pressure relief outlet is larger than the diameter of the flow guiding channel.

[0034] Optionally, the driving component further includes:

[0035] An elastic member has one end disposed on the fixed member and the other end disposed on the first movable member, so as to push the first movable member away from the fixed member.

[0036] Optionally, it also includes a hollow valve port, which is sealed in the third channel and placed between the first outlet end and the second inlet end; so as to close the valve port when the second movable member contacts the top of the valve port; the inner wall diameter of the valve port is smaller than the diameter of the second movable member.

[0037] Optionally, a reinforcement portion is provided at the bottom of the second movable member, and the reinforcement portion is arranged corresponding to the second sealing member to assist in sealing.

[0038] Optionally, the driving component further includes at least one magnetizing portion, which is arranged around the control component and is used to fill the gap between the coil and the control component to increase the magnetic force provided by the coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A cross-sectional view of the main structure of a pressure-stabilizing valve according to an embodiment of the present invention

[0040] Figure 2 A schematic diagram of the arrangement positions of a fixed member, a first movable member, and a second movable member according to an embodiment of the present invention;

[0041] Figure 3 Schematic diagram of the structure of a second moving member according to an embodiment of the present invention;

[0042] Figure 4 for Figure 3 Enlarged view of part A.

[0043] Reference numerals:

[0044] 100, valve body; 110, first channel; 111, first outlet port; 120, second channel; 121, second inlet port; 130, third channel; 210, fixing member; 220, first moving member; 221, first sealing member; 230, second moving member; 231, flow guide channel; 232, pressure relief channel; 2321, first pressure relief area; 2322, connecting area; 2323, second pressure relief area; 233, protrusion; 234, second sealing member; 235, mounting hole; 236, connecting member; 237, reinforcement portion; 310, coil; 320, elastic member; 330, magnetizing portion; 410, guide ring; 420, pressure relief outlet; 500, valve port. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with ordinary skills in the field to which the invention belongs. The words "including" and similar words used in this article mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0046] The following is combined with Figure 1-4 , the specific implementation methods of the present invention are further described in detail.

[0047] An embodiment of the present invention provides a pressure-stabilizing valve, comprising a valve body 100 , wherein the valve body 100 has a first channel 110 , a second channel 120 , and a third channel 130 ; the third channel 130 has a bottom end and a top end;

[0048] The first channel 110 includes a first outlet end 111 communicating with the third channel 130, and the second channel 120 includes a second inlet end 121 communicating with the third channel 130. The second inlet end 121 is higher than the first outlet end 111, so that the medium flows through the first channel 110, enters the third channel 130 through the first outlet end 111, moves from the bottom end to the top end in the third channel 130, and enters the second channel 120 through the second inlet end 121.

[0049] The control part is partially provided on the valve body 100, and the other part passes through the top and is movably provided in the third channel 130 to control the connection or disconnection between the first channel 110 and the second channel 120. When the control part controls the connection between the first channel 110 and the second channel 120, the medium pushes the control part away from the bottom during the flow process.

[0050] In some embodiments, the first channel 110 includes a first inlet and a first outlet 111, and the second channel 120 includes a second inlet 121 and a second outlet. The first channel 110 is used to admit a medium, while the second channel 120 is used to discharge the medium. A third channel 130 is disposed between the first channel 110 and the second channel 120, allowing the medium in the first channel 110 to flow through the third channel 130 and then into the second channel 120. Specifically, the first outlet 111 is in communication with the third channel 130, and the second inlet 121 is in communication with the third channel 130. More specifically, the medium enters the first channel 110 from the first inlet and enters the third channel 130 through the first outlet 111. The medium in the third channel 130 enters the second channel 120 through the second inlet 121 and is discharged from the second channel 120 through the second outlet.

[0051] In some embodiments, the second inlet end 121 is higher than the first outlet end 111 , so that the medium moves from the bottom end to the top end in the third channel 130 , thereby entering the second inlet end 121 from the first outlet end 111 .

[0052] In some specific embodiments, the pressure-stabilizing valve is further provided with a control unit, a portion of which is placed outside the valve body 100, and another portion is placed inside the valve body 100. Specifically, a portion of the control unit is provided on the valve body 100, and another portion passes through the top end and is movably provided in the third channel 130. More specifically, the portion movably provided in the third channel 130 can move in the third channel 130 along the axial direction of the third channel 130, thereby closing or opening the second outlet end to facilitate the flow of the medium. More specifically, when the control unit controls the first channel 110 and the second channel 120 to be connected, the control unit closes the second inlet end 121; when the control unit controls the first channel 110 and the second channel 120 to be connected, the medium flows, and during the flow process, the medium pushes the control unit to move so that the control unit does not completely block the second inlet end 121. The details will be described later.

[0053] The control unit includes:

[0054] The control assembly includes a fixed member 210, a first movable member 220, and a second movable member 230 in sequence in the third channel 130. The fixed member 210 is located near the top and is fixed to the valve body 100. The first movable member 220 and the second movable member 230 are movably disposed in the third channel 130.

[0055] The driving assembly is provided in the valve body 100 and is used to drive the first moving member 220 and the second moving member 230 to move so as to close or open the second inlet end 121 .

[0056] In order to facilitate the control of the closure or opening of the second inlet end 121, the control part includes a control component and a drive component, wherein the control component includes a fixed member 210, a first movable member 220 and a second movable member 230, and the position of the fixed member 210 on the valve body 100 is fixed. Specifically, the fixed member 210 is fixedly arranged at the top end of the third channel 130, with a portion placed outside the third channel 130 and a portion placed inside the third channel 130. The fixing method can be bonding, snap-fitting or interference fit, etc., which is not limited here, and the main principle is that the position of the fixed member 210 on the third channel 130 will not move. The first movable member 220 and the second movable member 230 are both arranged inside the third channel 130 and can move inside the third channel 130 along the axial direction of the third channel 130 to close or open the second inlet end 121 during the movement. One end of the first moving member 220 is close to the fixed member 210 , and the other end is close to the second moving member 230 , so that the fixed member 210 , the first moving member 220 and the second moving member 230 are sequentially arranged in the third channel 130 .

[0057] In some embodiments, the drive assembly is fixedly arranged on the outside of the valve body 100, and its fixing method can be bonding, clamping or bolting, etc., which is not limited here, and the main purpose is that the position between the drive assembly and the valve body 100 does not move relative to each other. Specifically, the drive assembly is connected to the fixed member 210, and during the movement of the first movable member 220 and the second movable member 230, the positions of the fixed member 210 and the drive assembly do not change. In some specific embodiments, the drive assembly can be a cylinder to drive the first movable member 220 and the second movable member 230 to move. Or the drive assembly drives the first movable member 220 and the second movable member 230 to rotate by magnetic force, which will be specifically introduced later.

[0058] The fixed member 210, the first movable member 220 and the second movable member 230 are all made of iron-containing materials;

[0059] The driving assembly includes a coil 310 , which is sleeved on the control assembly and is used to magnetize the fixed member 210 , the first movable member 220 and the second movable member 230 to move the first movable member 220 and / or the second movable member 230 relative to the fixed member 210 .

[0060] In certain embodiments, drive assembly comprises coil 310, bracket and shell, wherein coil 310 is wound on bracket to form winding, and coil 310 and bracket are both placed in shell, and coil 310 is arranged around fixed member 210 simultaneously, because fixed member 210, first moving member 220 and second moving member 230 are all located in the 3rd channel 130, so the magnetic force produced after coil 310 is energized can cover first moving member 220, second moving member 230 and fixed member 210. Its energizing mode is prior art, does not go into details here. According to above, it can be understood that fixed member 210 is fixed member 210, and first moving member 220 and second moving member 230 are both moving iron cores, and in the process of controlling pressure-stabilizing valve, drive assembly is energized, and fixed member 210, first moving member 220 and second moving member 230 are magnetized, and simultaneously because the position of fixed member 210 does not change, first moving member 220 and second moving member 230 move towards fixed member 210. Furthermore, in order to facilitate fixing of the driving assembly, a convex portion is formed on the side wall of the valve body 100, the third channel 130 passes through the convex portion, and the bracket is fixed to the outer wall of the convex portion.

[0061] The pressure-stabilizing valve also includes a hollow valve port 500, which is sealed in the third channel 130 and placed between the first outlet end 111 and the second inlet end 121; so as to close the valve port 500 when the second movable member 230 contacts the top of the valve port 500; the inner wall diameter of the valve port 500 is smaller than the diameter of the second movable member 230.

[0062] In some embodiments, the valve port 500 is tubular so that the medium can pass through its interior; at the same time, the valve port 500 is arranged between the first outlet port 111 and the second inlet port 121. Since the fixed member 210, the first movable member 220 and the second movable member 230 are arranged at the same time, the second movable member 230 will contact the valve port 500 during the movement. Specifically, when the second movable member 230 contacts the top of the valve port 500, the valve port 500 is closed, and the medium will not continue to circulate. It is worth noting that the inner wall diameter of the valve port 500 is smaller than the diameter of the second movable member 230, so that the valve port 500 is closed when the second movable member 230 contacts the valve port 500.

[0063] The third channel 130 is divided into an upper cavity area, a lower cavity area and an air supply area in sequence from the top to the bottom.

[0064] The second movable member 230 is provided with a flow guide channel 231 for connecting the upper chamber area with the air supply area; the second movable member 230 is also provided with a pressure relief channel 232 for connecting the upper chamber area with the second channel 120;

[0065] When the pressures in the upper chamber area, the lower chamber area, and the air supply area are the same, the driving assembly magnetizes the fixed member 210, the first movable member 220, and the second movable member 230. The fixed member 210 attracts the first movable member 220 and the second movable member 230 to move, so that the first channel 110 is connected to the second channel 120.

[0066] When the pressure in the upper chamber area and the lower chamber area is greater than the pressure in the air supply area, the driving component magnetizes the fixed part 210, the first movable part 220 and the second movable part 230, the fixed part 210 adsorbs the first movable part 220 to move, and the medium in the upper chamber area is transferred to the second channel 120 along the pressure relief channel 232. The medium in the first channel 110 pushes the second movable part 230 to move, so that the first channel 110 is connected to the second channel 120.

[0067] In the prior art, especially in the field of fuel control of natural gas engines, the current engine horsepower is getting bigger and bigger, and the flow demand for the pressure-stabilizing valve is also getting bigger and bigger. Then the caliber of the solenoid valve is also getting bigger and bigger, and the pressure difference when the solenoid valve is started is very large. The direct-acting shut-off valve can no longer meet this application. Therefore, a pilot shut-off valve is needed. However, as the engine has higher and higher requirements for the fuel control accuracy, the shut-off valve needs to be able to start normally under 0 pressure difference, and the pilot shut-off valve needs a pressure difference to start, so it cannot meet the demand for 0 pressure difference start-up. By arranging the first movable member 220, the second movable member 230, and the coordination of the guide channel 231 and the pressure relief channel 232 on the second movable member 230, the pressure-stabilizing valve can achieve a starting state of 0 pressure difference and large flow, while retaining the starting method of large pressure difference, which is described in detail below.

[0068] In certain embodiments, the sidewall of the second mobile member 230 is provided with a sealing ring. Concretely, the sidewall of the second mobile member 230 offers a sealing groove, and the sealing ring is arranged in the sealing groove, and the inner ring of the sealing ring abuts the bottom of the sealing groove, and the outer ring abuts the 3rd channel 130 inwalls, thereby with the gap sealing between the second mobile member 230 and the 3rd channel 130 inwalls, reduces the possibility that medium passes through between the second mobile member 230 outer walls and the 3rd channel 130 inwalls. Concretely, the width of the sealing groove is greater than the width of the sealing ring, makes to give a certain relative motion space between the sealing ring and the second mobile member 230, thereby reduces the interference to the second mobile member 230 motion processes. More specifically, the sealing ring is a rubber or silicone material, is not restricted at this, and is based on being able to realize sealing action.

[0069] In some specific embodiments, the third channel 130 is divided into an upper chamber region, a lower chamber region, and an air supply region, sequentially from the top to the bottom, with the sealing ring and the valve port 500 as the boundary. Specifically, the upper chamber region is above the sealing ring; the lower chamber region is between the sealing ring and the valve port 500; and the air supply region is below the valve port 500. The first outlet 111 is connected to the air supply region; the second inlet 121 is connected to the lower chamber region.

[0070] In some specific embodiments, a guide channel 231 and a pressure relief channel 232 are opened on the second movable member 230 , wherein the guide channel 231 connects the upper cavity area with the air supply area, and the pressure relief channel 232 connects the upper cavity area with the second channel 120 .

[0071] In some specific embodiments, when the pressure in the third channel 130 is the same, that is, when the pressure in the upper chamber area, the lower chamber area and the air supply area is the same, the driving component magnetizes the fixed part 210, the first movable part 220 and the second movable part 230, and the fixed part 210 adsorbs the first movable part 220 and the second movable part 230 to move, so that the first channel 110 is connected to the second channel 120.

[0072] In some specific embodiments, when the pressure in the third channel 130 is different, that is, when the pressure in the upper chamber area and the lower chamber area is greater than the pressure in the air supply area, the driving component magnetizes the fixed part 210, the first movable part 220 and the second movable part 230, the fixed part 210 adsorbs the first movable part 220 to move, and the medium in the upper chamber area is transferred to the second channel 120 along the pressure relief channel 232. The medium in the first channel 110 pushes the second movable part 230 to move, so that the first channel 110 is connected to the second channel 120.

[0073] In some more specific embodiments, during the movement of the first movable member 220 and the second movable member 230, specifically, when the coil 310 is energized, the fixed member 210, the first movable member 220 and the second movable member 230 are all magnetized and the magnetic directions are consistent. Since the first movable member 220 is close to the fixed member 210, under the action of the magnetic force, the first movable member 220 will be pulled up by the fixed member 210 first. At this time, if the pressure at the upper end and the lower end of the first movable member 220 and the second movable member 230 are the same, that is, the pressure of the medium at the lower end of the valve port 500 is the same as that of the fixed member 210, the pressure of the medium at the lower end of the valve port 500 is the same as that of the fixed member 210. When the medium pressure at the upper end is the same, the medium pressure at each point in the third channel 130 is the same, so that the medium pressure at the top and bottom of the first movable member 220 and the second movable member 230 are the same; therefore, the second movable member 230 will not be subjected to pressure from the medium. At this time, the second movable member 230 will also move under the action of the magnetic force, that is, the first movable member 220 adsorbs the second movable member 230, causing the second movable member 230 to move, forming an electromagnetic valve startup, thereby opening the second inlet end 121, and at this time the first channel 110 and the second channel 120 are connected.

[0074] If the medium pressure at the lower end of the valve port 500 is lower than the medium pressure at the upper end, when the first movable member 220 is pulled up by the fixed member 210, due to the low medium pressure at the lower end, the pressure in the upper cavity area will be released into the second channel 120 along the pressure relief channel 232 after the first movable member 220 is pulled up. The area of the pressure relief channel 232 is larger than the area of the guide channel 231, and the amount of air supplied to the air supply area through the guide channel 231 is less than the pressure relief amount. At this time, the upper cavity area of the second movable member 230 is in a low-pressure state, and the medium pressure in the air supply area in the valve port 500 is in a high-pressure state. Therefore, a combined upward pressure differential will be formed on the upper / lower sides of the second movable member 230, and this pressure differential will push the second movable member 230 to open. This design enables the pressure-stabilizing valve to maintain a large flow of medium under zero pressure differential conditions, while taking into account the situation of large pressure differential startup. That is, it overcomes the problem that ordinary pilot-operated electromagnetic shut-off valves require a starting pressure difference and can reach a 0 pressure difference start. At the same time, the design of the special moving iron core pressure relief channel 232 and the lower air intake flow channel design can take into account the characteristics of the pilot electromagnetic valve opening under a large pressure difference.

[0075] It is worth noting that since the diameter of the second movable member 230 is larger than the diameter of the inner wall of the valve port 500, when the coil 310 is not energized, the second movable member 230 is subjected to the downward spring force of the reset spring and the downward medium force formed by the upper chamber area and the lower chamber area. This design ensures the sealing when there is no power.

[0076] The diameter of the pressure relief channel 232 is greater than the diameter of the flow guiding channel 231 .

[0077] In some embodiments, the diameter of the pressure relief channel 232 is larger than the diameter of the guide channel 231 to ensure that the pressure relief speed is greater than the speed of the medium from the air supply area through the guide channel 231 to the upper chamber area, thereby facilitating the pressure relief process and thus facilitating the control of the closing or opening process of the second inlet end 121.

[0078] A protrusion 233 is provided on the top of the second moving member 230 , and a pressure relief channel 232 passes through the protrusion 233 ;

[0079] A first sealing member 221 is provided at the bottom of the first moving member 220 . The first sealing member 221 corresponds to the position of the protrusion 233 so as to close the pressure relief channel 232 when the first moving member 220 contacts the second moving member 230 .

[0080] In some embodiments, a protrusion 233 is fixedly provided on the top of the second movable member 230. The fixing method can be adhesive, clamping, or integral molding, etc., which are not limited here, and the protrusion 233 is mainly to prevent movement on the top of the second movable member 230. At the same time, the protrusion 233 is coaxially arranged with the second movable member 230, and the top of the pressure relief channel 232 passes through the protrusion 233.

[0081] In some specific embodiments, a first sealing member 221 is provided at the bottom of the first movable member 220, and the position of the first sealing member 221 corresponds to the position of the protrusion 233. When the first movable member 220 contacts the second movable member 230, the first sealing member 221 contacts the protrusion 233, thereby closing the top of the pressure relief channel 232, so that the third channel 130 and the second channel 120 will not be connected through the pressure relief channel 232.

[0082] The pressure relief channel 232 has a first pressure relief area 2321, a connecting area 2322 and a second pressure relief area 2323 which are connected in sequence;

[0083] The first pressure relief area 2321 is coaxial with the second moving member 230 , and one end of the first pressure relief area 2321 is in communication with the upper chamber area;

[0084] The second pressure relief area 2323 is provided on the side wall of the second moving member 230 and communicates with the second channel 120 ;

[0085] One end of the connecting area 2322 is connected to the other end of the first pressure relief area 2321 , and the other end is connected to the second pressure relief area 2323 , so that the first pressure relief area 2321 and the second pressure relief area 2323 are connected;

[0086] The diameters of the first pressure relief area 2321 and the connecting area 2322 are both larger than the diameter of the flow guiding channel 231 .

[0087] In some embodiments, the first pressure relief zone 2321 is coaxial with the second movable member 230. Specifically, the top of the first pressure relief zone 2321 is communicated with the upper chamber area, and at the same time passes through the protrusion 233 on the top of the second movable member 230. The second pressure relief zone 2323 is opened on the side wall of the second movable member 230, and at least part of the space of the second pressure relief zone 2323 is communicated with the second channel 120. The connecting area 2322 is opened in the second movable member 230, and one end of the connecting area 2322 is communicated with the first pressure relief zone 2321, and the other end is communicated with the second pressure relief zone 2323, so that the first pressure relief zone 2321 and the second pressure relief zone 2323 are communicated through the connecting area 2322. During the pressure relief process, the medium in the upper chamber area passes through the first pressure relief zone 2321, the connecting area 2322 and the second pressure relief zone 2323 in sequence and enters the second channel 120.

[0088] In some embodiments, to facilitate the pressure relief process, when the second movable member 230 contacts the valve port 500, the second pressure relief area 2323 communicates with the second channel 120. When the second movable member 230 is attracted by the first movable member 220 to the top of the third channel 130, a portion of the second pressure relief area 2323 remains in communication with the second channel 120, facilitating the pressure relief process.

[0089] In some specific embodiments, the diameters of the first pressure relief area 2321 and the connection area 2322 are both larger than the diameter of the guide channel 231, thereby ensuring that the pressure relief speed is greater than the speed of the medium from the air supply area through the guide channel 231 to the upper chamber area, thereby facilitating the pressure relief process.

[0090] At least part of the guide channel 231 is not coaxial with the pressure relief channel 232, and at least part of the guide channel 231 passes through the top of the second movable member 230; when the first movable member 220 and the second movable member 230 are in contact or separation, the guide channel 231 is connected to the upper cavity area.

[0091] In some embodiments, at least a portion of the flow guiding channel 231 is eccentrically disposed on the second moving member 230 , that is, at least a portion of the flow guiding channel 231 is not coaxially disposed with the pressure relief channel 232 .

[0092] In some specific embodiments, when the electromagnetic coil 310 is not energized, the pressure relief channel 232 must be closed by the first seal 221 on the first movable part 220 to ensure the pressure formation in the upper chamber area. The first seal 221 on the first movable part 220 is in the middle position (considering the sealing requirements, the position is designed in the middle, the force is uniform, the design is simple, the cost is low, and the sealing effect is good). The pressure relief channel 232 needs to be aligned with the first seal 221, so the upper part of the pressure relief channel 232 is in the center position of the second movable part 230. Because the first pressure relief area 2321 eventually needs to be connected to the second pressure relief area 2323, a horizontal hole is designed, that is, the connection area 2322 connects the first pressure relief area 2321 and the second pressure relief area 2323 to form the pressure relief channel 232, so the pressure relief channel 232 has an L-shaped design.

[0093] Secondly, the guide channel 231 needs to remain conductive whether the electromagnetic coil 310 is powered on or off, so it is eccentrically arranged on the second movable part 230, and ensures a safe distance from the pressure relief channel 232 and the first sealing part 221 (the minimum distance is more than 1.0 mm). At the same time, the entrance of the guide channel 231 is centered at the sealing point between the second movable part 230 and the valve port 500 to ensure the sealing of the second movable part 230 and the valve port 500. Therefore, the guide channel 231 is centered below the second movable part 230, and the upper part is eccentrically designed.

[0094] A second sealing member 234 is provided at the bottom of the second moving member 230;

[0095] The bottom of the second movable member 230 has a mounting hole 235, which is coaxial with the second movable member 230 and connected to the guide channel 231; a detachable connecting member 236 is provided in the mounting hole 235, and the connecting member 236 passes through the second sealing member 234 and is connected to the mounting hole 235; a connecting channel is opened through the connecting member 236, so that after the connecting member 236 is connected to the mounting hole 235, the guide channel 231 is connected to the air supply area through the connecting channel.

[0096] In some embodiments, the guide channel 231 is connected to the mounting hole 235. Specifically, the axis of the guide channel 231 is parallel to the axis of the second movable member 230, and the top of the guide channel 231 passes through the top of the second movable member 230, and part of the side wall of the bottom of the guide channel 231 is connected to the mounting hole 235, so that the upper area and the lower area of the second movable member 230 are connected through the guide channel 231 and the mounting hole 235, so that the medium in the air supply area can be connected to the upper chamber area through the guide channel 231.

[0097] In some specific embodiments, when the first movable member 220 contacts the second movable member 230, the first sealing member 221 abuts against the boss. At this time, there is a gap between the bottom of the first movable member 220 and the top of the second movable member 230, and the guide channel 231 is connected to the gap, so that the medium in the air supply area can flow into the upper chamber area through the guide channel 231 when the first movable member 220 contacts the second movable member 230.

[0098] In some specific embodiments, when the first movable member 220 and the second movable member 230 are not in contact with each other, the first sealing member 221 is spaced apart from the boss. At this time, there is a gap between the bottom of the first movable member 220 and the top of the second movable member 230. The guide channel 231 is connected to the gap, so that the medium in the air supply area can flow into the upper chamber area through the guide channel 231 when the first movable member 220 and the second movable member 230 are in contact.

[0099] In some specific embodiments, the mounting hole 235 is coaxially arranged with the second movable member 230, and a connecting member 236 and a second sealing member 234 are provided in the mounting hole 235. The second sealing member 234 is annular, and the connecting member 236 passes through the second sealing member 234 and is connected to the mounting hole 235, thereby connecting the second sealing member 234 to the mounting hole 235.

[0100] In some more specific embodiments, the connecting member 236 is a pin, and the connecting member 236 is hollow. When the connecting member 236 connects the second sealing member 234 to the mounting hole 235, there is a gap between the top of the connecting member 236 and the bottom of the mounting hole 235, and the guide channel 231 is connected to the gap, which facilitates the medium to enter the guide channel 231.

[0101] In some more specific embodiments, a sealing hole is defined at the bottom of the second movable member 230 and is coaxially disposed with the second movable member 230. A mounting hole 235 is defined at the bottom of the sealing hole, such that the mounting hole 235 and the sealing hole together form a countersunk hole. The sealing hole is used to mount a second sealing member 234. The height of the second sealing member 234 can be the same as or greater than the depth of the sealing hole, without limitation, as long as the sealing function is achieved.

[0102] The pressure regulating valve also includes:

[0103] The guide ring 410 is disposed around the second moving member 230 and covers a portion of the second pressure relief area 2323 , so that the second pressure relief area 2323 and the bottom of the guide ring 410 form a pressure relief outlet 420 for the flow of the medium;

[0104] The diameter of the pressure relief outlet 420 is larger than the diameter of the flow guiding channel 231 .

[0105] In some embodiments, the pressure-stabilizing valve further includes a guide ring 410. The guide ring 410 surrounds the second movable member and is disposed on the side wall of the second movable member 230, and partially blocks the second pressure relief area 2323. It is worth noting that the guide ring 410 is disposed at the diameter change portion of the third channel 130. Since the second movable member 230 reciprocates within the third channel 130, the diameter change portion of the third channel 130 causes the side wall of the second movable member 230 to be more severely worn. Therefore, the guide ring 410 is disposed on the side wall of the second movable member 230 to reduce the wear on the side wall of the second movable member 230.

[0106] In some specific embodiments, the guide ring 410 covers part of the second pressure relief area 2323 , so that the second pressure relief area 2323 and the bottom of the guide ring 410 form a pressure relief outlet 420 for circulating the medium. At the same time, the diameter of the pressure relief outlet 420 is larger than the diameter of the guide channel 231 .

[0107] In some more specific embodiments, the diameter of the pressure relief channel 232 is smaller than the diameter of the valve port 500, and the pressure relief channel 232 forms a seal with the first sealing member 221 on the first movable member 220. When the coil 310 is not energized, the first movable member 220 is subjected to a downward spring force and a downward medium force of the area of the pressure relief channel 232. Since the area of the pressure relief channel 232 is much smaller than the area of the valve port 500, the medium force it is subjected to is very small. Therefore, when the coil 310 is energized, the force exerted by the fixing member 210 on the first movable member 220 is sufficient to overcome the spring force and the medium force, and it is easily pulled up. This design can achieve operation under high pressure.

[0108] In some specific embodiments, the diameters of the first pressure relief area 2321, the second pressure relief area 2323, the connecting area 2322, and the pressure relief outlet 420 are all larger than the diameter of the flow diversion channel 231, so that the pressure relief speed is greater than the flow diversion speed. Specifically, the diameter of the pressure relief channel 232 is at least twice the diameter of the flow diversion channel 231. In some more specific embodiments, the ratio of the diameter of the pressure relief channel 232 to the diameter of the flow diversion channel 231 is 2.5:1. In some more specific embodiments, the ratio of the diameter of the pressure relief channel 232 to the diameter of the flow diversion channel 231 is 3:1. In some more specific embodiments, the ratio of the diameter of the pressure relief channel 232 to the diameter of the flow diversion channel 231 is 3.5:1.5. In some more specific embodiments, the ratio of the diameter of the pressure relief channel 232 to the diameter of the flow diversion channel 231 is 4:1. In some more specific embodiments, the ratio of any one of the first pressure relief area 2321 , the second pressure relief area 2323 , the connecting area 2322 and the pressure relief outlet 420 to the flow guiding channel 231 is applicable to the above ratio.

[0109] In some embodiments, both the first channel 110 and the second channel 120 are provided with filter elements for filtering a medium. Specifically, the medium is air, and the filter element is used to filter the air. The filter element in the first channel 110 is tubular and located at the first outlet 111; the filter element in the second channel 120 is circular and plate-shaped and located at the second inlet 121.

[0110] The drive components also include:

[0111] The elastic member 320 has one end disposed on the fixed member 210 and the other end disposed on the first movable member 220 , so as to push the first movable member 220 away from the fixed member 210 .

[0112] In some embodiments, in order to facilitate the first movable member 220 and the second movable member 230 to block the valve port 500, the drive assembly further includes an elastic member 320, which is used to push the first movable member 220 toward the valve port 500, thereby blocking the valve port 500.

[0113] In some specific embodiments, the elastic member 320 is a spring and is disposed between the fixed member 210 and the first movable member 220 .

[0114] In some embodiments, the first movable member 220 and the side wall of the valve port 500 are both provided with sealing rings, and the setting method of the sealing rings is the same as the setting method of the sealing rings on the side wall of the second movable member 230, which will not be repeated here.

[0115] A reinforcement portion 237 is provided at the bottom of the second moving member 230 . The reinforcement portion 237 is provided corresponding to the second sealing member 234 to assist in sealing.

[0116] In some embodiments, a reinforcement portion 237 is provided at the bottom of the second movable member 230. The reinforcement portion 237 can be provided by bonding, snap-fitting, or integrally formed, etc., without limitation herein, and is mainly used to ensure the sealing between the second movable member 230 and the second sealing member 234. The reinforcement portion 237 is annular and is provided around the bottom wall of the sealing hole, coaxial with the second movable member 230. Furthermore, the sidewalls of the reinforcement portion 237 are inclined, and specifically, the inner and outer sidewalls of the reinforcement portion 237 are inclined in a direction approaching each other to increase the contact area with the second sealing member 234, thereby improving the sealing.

[0117] In some more specific embodiments, the cross section of the reinforcement portion 237 is an isosceles triangle with a base length of 0.4 mm, a protrusion 233 height of 0.25±0.05 mm, a vertex angle of 60°, and a 0.1 mm arc treatment on the vertex angle.

[0118] The center distance of the ring is 6.7 mm in diameter, which is between the 8 mm compression surface of the connector 236 and the 5.8 mm inner hole diameter of the second sealing member 234, ensuring that the reinforcement portion 237 forms a seal within the effective compression area after the connector 236 is compressed.

[0119] The design of the top arc of the protrusion 233 being 0.1 mm can ensure that the sealing function is guaranteed after the protrusion 233 is squeezed into the seal without damaging the seal, thereby achieving a long service life.

[0120] The height of the protrusion 233 is 0.25±0.05 mm, which can ensure that the relevant dimensions of the three parts, the second movable member 230, the second sealing member 234, and the connecting member 236, form a compression amount of 5% to 25% within the tolerance range, thereby ensuring the sealing effect.

[0121] In some embodiments, a groove is formed on the top of the second sealing member 234 to cooperate with the reinforcement portion 237 for sealing.

[0122] The driving assembly further includes at least one magnetizing portion 330 , which is disposed around the control assembly and is used to fill the gap between the coil 310 and the control assembly to increase the magnetic force provided by the coil 310 .

[0123] In some embodiments, magnetizing portions 330 are provided at both ends of the bracket. Specifically, the bracket is disposed around the control assembly and is provided with a first placement slot and a second placement slot. Because the control assembly is disposed within the bracket, the bracket is hollowed in the middle to form a mounting channel. The mounting channel is coaxially disposed with the bracket, and the control assembly is disposed within the mounting channel. In some specific embodiments, the first placement slot is disposed on the inner wall of the mounting channel and is located at the top of the bracket. In some specific embodiments, the second placement slot is disposed on the inner wall of the mounting channel and is located at the bottom of the bracket.

[0124] In some embodiments, a magnetizing portion 330 is provided in the first placement slot, and the magnetizing portion 330 has the same shape as the first placement slot, that is, it is arranged in a ring shape; at the same time, the inner wall of the magnetizing portion 330 fits the outer wall of the control component, and the outer wall of the magnetizing portion 330 fits the side wall of the first placement slot, thereby filling the gap between the windings and the control component.

[0125] In some embodiments, a magnetizing portion 330 is provided in the second placement groove, and the magnetizing portion 330 has the same shape as the second placement groove, that is, it is arranged in a ring shape; at the same time, the outer wall of the magnetizing portion 330 fits the side wall of the second placement groove, and the inner wall of the magnetizing portion 330 is flush with the inner wall of the bracket.

[0126] In some embodiments, the sidewall of the bracket is provided with a slot, and the coil 310 is wound within the slot to form a winding on the bracket. More specifically, the electromagnetic drive device further includes a housing, within which the control component, bracket, and coil 310 are all housed. The housing is made of a magnetically conductive material. When the winding is energized, magnetic lines of force are generated. These lines of force are inherently divergent, generating a weak magnetic force. However, under the constraints of the magnetically conductive housing, the majority of these lines of force form a magnetic loop with the iron core and the housing as their path, thereby increasing the magnetic effect and overcoming air pressure or other forces to drive the control component to move. Due to issues with the assembly and production of the coil 310, many gaps are created between all the magnetically conductive components, particularly between the control component and the bracket. These gaps also reduce the magnetic effect. The magnetizing portion 330 is made of a material containing iron and fills the gap between the control component and the bracket, increasing the magnetic force and thereby maximizing the magnetic force within the limited space of the electromagnetic drive device.

[0127] The implementation principle of the pressure-stabilizing valve of the present application is that the medium passes through the first channel 110, the third channel 130 and the second channel 120 in sequence, and moves from bottom to top in the third channel 130 and flows into the second channel 120, that is, the medium enters the upper chamber area from the valve port 500 through the guide channel 231, and the pressure flow path will be blocked by the sealing ring installed on the second movable member 230 and cannot enter the lower chamber area. For the zero pressure difference starting situation, the bottom-up air intake method will not form a vacuum area between the second movable member 230 and the valve port 500 when the solenoid valve is open, thereby avoiding the problem of the moving iron core being sucked down by the vacuum under the condition of large flow; at the same time, the large pressure difference starting method is retained. It satisfies the situation that the ordinary pilot-operated cut-off valve takes into account both zero pressure difference starting and large pressure difference starting.

[0128] While the embodiments of the present invention have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations of these embodiments are possible. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the claims. Furthermore, the invention described herein is susceptible to other embodiments and may be practiced or implemented in a variety of ways.

Claims

1. A pressure stabilizing valve, characterized in that: The valve body (100) comprises a first channel (110), a second channel (120) and a third channel (130) inside the valve body (100); the third channel (130) has a bottom end and a top end; The first channel (110) includes a first outlet end (111) communicating with the third channel (130), and the second channel (120) includes a second inlet end (121) communicating with the third channel (130), wherein the second inlet end (121) is higher than the first outlet end (111), so that the medium flows through the first channel (110), enters the third channel (130) through the first outlet end (111), moves in the third channel (130) in a direction from the bottom end toward the top end, and enters the second channel (120) through the second inlet end (121); a control portion, a portion of which is disposed on the valve body (100), and another portion of which passes through the top end and is movably disposed in the third channel (130) to control the connection or disconnection between the first channel (110) and the second channel (120); when the control portion controls the connection between the first channel (110) and the second channel (120), the medium pushes the control portion away from the bottom end during the flow process; The control unit includes: A control assembly comprises a fixed member (210), a first movable member (220), and a second movable member (230) sequentially arranged in the third channel (130), wherein the fixed member (210) is close to the top end and fixed to the valve body (100); the first movable member (220) and the second movable member (230) are movably arranged in the third channel (130); a driving assembly, provided on the valve body (100), for driving the first moving member (220) and the second moving member (230) to move so as to close or open the second inlet end (121); The fixed member (210), the first movable member (220) and the second movable member (230) are all made of iron-containing materials; The driving component comprises a coil (310), wherein the coil (310) is sleeved on the control component and is used to magnetize the fixed member (210), the first movable member (220) and the second movable member (230), so as to enable the first movable member (220) and / or the second movable member (230) to move relative to the fixed member (210); The third channel (130) is divided into an upper cavity area, a lower cavity area and an air supply area in sequence from the top end toward the bottom end; The second movable member (230) is provided with a flow guide channel (231) for connecting the upper chamber area and the air supply area; the second movable member (230) is also provided with a pressure relief channel (232) for connecting the upper chamber area and the second channel (120); When the pressures in the upper chamber area, the lower chamber area, and the air supply area are the same, the driving component magnetizes the fixed member (210), the first movable member (220), and the second movable member (230), and the fixed member (210) attracts the first movable member (220) and the second movable member (230) to move, so that the first channel (110) is connected to the second channel (120); When the pressure in the upper chamber area and the lower chamber area is greater than the pressure in the air supply area, the driving component magnetizes the fixed part (210), the first movable part (220) and the second movable part (230), the fixed part (210) adsorbs the first movable part (220) to move, the medium in the upper chamber area is transferred to the second channel (120) along with the pressure relief channel (232), and the medium in the first channel (110) pushes the second movable part (230) to move, so that the first channel (110) is connected to the second channel (120).

2. The pressure-stabilizing valve according to claim 1, characterized in that: The diameter of the pressure relief channel (232) is greater than the diameter of the flow guide channel (231).

3. The pressure-stabilizing valve according to claim 1, characterized in that: A protrusion (233) is provided on the top of the second moving member (230), and the pressure relief channel (232) passes through the protrusion (233); A first sealing member (221) is provided at the bottom of the first movable member (220), and the first sealing member (221) corresponds to the position of the protrusion (233) so as to close the pressure relief channel (232) when the first movable member (220) contacts the second movable member (230).

4. The pressure-stabilizing valve according to claim 3, characterized in that: At least part of the guide channel (231) is not coaxial with the pressure relief channel (232), and at least part of the guide channel (231) passes through the top of the second moving member (230); when the first moving member (220) and the second moving member (230) are in contact or separation, the guide channel (231) is connected to the upper cavity area.

5. The pressure-stabilizing valve according to claim 1, characterized in that: A second sealing member (234) is provided at the bottom of the second moving member (230); The bottom of the second movable member (230) is provided with a mounting hole (235), the mounting hole (235) is coaxial with the second movable member (230) and is connected to the guide channel (231); a connecting member (236) is detachably provided in the mounting hole (235), and the connecting member (236) is connected to the mounting hole (235) after passing through the second sealing member (234); a connecting channel is provided through the connecting member (236), so that after the connecting member (236) is connected to the mounting hole (235), the guide channel (231) is connected to the air supply area through the connecting channel.

6. The pressure-stabilizing valve according to claim 1, characterized in that: The pressure relief channel (232) has a first pressure relief area (2321), a connection area (2322), and a second pressure relief area (2323) that are connected in sequence; The first pressure relief area (2321) is coaxial with the second moving member (230), and one end of the first pressure relief area (2321) is in communication with the upper chamber area; The second pressure relief area (2323) is provided on the side wall of the second moving member (230) and is in communication with the second channel (120); One end of the connecting area (2322) is in communication with the other end of the first pressure relief area (2321), and the other end is in communication with the second pressure relief area (2323), so that the first pressure relief area (2321) and the second pressure relief area (2323) are in communication; The diameters of the first pressure relief area (2321) and the connection area (2322) are both larger than the diameter of the flow guide channel (231).

7. The pressure-stabilizing valve according to claim 6, characterized in that: Also includes: A guide ring (410) is arranged around the second moving member (230) and covers a portion of the second pressure relief area (2323), so that the second pressure relief area (2323) and the bottom of the guide ring (410) form a pressure relief outlet (420) for the flow of medium; The diameter of the pressure relief outlet (420) is greater than the diameter of the flow guide channel (231).

8. The pressure-stabilizing valve according to claim 1, characterized in that: The drive assembly further includes: An elastic member (320) has one end disposed on the fixed member (210) and the other end disposed on the first movable member (220) so as to push the first movable member (220) away from the fixed member (210).

9. The pressure-stabilizing valve according to claim 1, characterized in that: The invention also includes a hollow valve port (500), which is sealed in the third channel (130) and placed between the first outlet end (111) and the second inlet end (121); so as to close the valve port (500) when the second movable member (230) contacts the top of the valve port (500); and the inner wall diameter of the valve port (500) is smaller than the diameter of the second movable member (230).

10. The pressure-stabilizing valve according to claim 5, characterized in that: A reinforcing portion (237) is provided at the bottom of the second moving member (230), and the reinforcing portion (237) is arranged corresponding to the second sealing member (234) to assist in sealing.

11. The pressure-stabilizing valve according to claim 1, characterized in that: The driving component further comprises at least one magnetizing portion (330) which is arranged around the control component and is used to fill the gap between the coil (310) and the control component to increase the magnetic force provided by the coil (310).

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