CN110242756B - Proportional valve and proportional valve assembly - Google Patents
Proportional valve and proportional valve assembly Download PDFInfo
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- CN110242756B CN110242756B CN201910531728.XA CN201910531728A CN110242756B CN 110242756 B CN110242756 B CN 110242756B CN 201910531728 A CN201910531728 A CN 201910531728A CN 110242756 B CN110242756 B CN 110242756B
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- 238000007789 sealing Methods 0.000 claims abstract description 72
- 238000004891 communication Methods 0.000 claims abstract description 9
- 230000000903 blocking effect Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 23
- 230000009286 beneficial effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229920006346 thermoplastic polyester elastomer Polymers 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009957 hemming Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube
- F16K41/12—Spindle sealings with diaphragm, e.g. shaped as bellows or tube with approximately flat diaphragm
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a proportional valve and a proportional valve assembly, when a first valve core blocks a first opening, fluid cannot enter a discharge cavity from a first inlet cavity, so that the proportional valve is in a closed state; when the valve rod is moved, the first valve core is driven by the valve rod to open the first opening, so that the first inlet cavity and the outlet cavity are in a communication state, and at the moment, fluid enters the outlet cavity from the first inlet cavity, so that the proportional valve is in an open state. Because the periphery of the first valve core is extended to be provided with the sealing edge, and the sealing edge is matched with the periphery of the first opening in a sealing manner after being deformed, when the pressure in the discharge cavity is increased, the sealing edge is pressed by the pressure to be bent and deformed, the deformed sealing edge can be attached to the periphery of the first opening, the first opening is blocked, fluid is effectively prevented from flowing back into the first inlet cavity from the discharge cavity, and safer operation of the proportional valve is ensured.
Description
Technical Field
The invention relates to the technical field of gas path control, in particular to a proportional valve and a proportional valve assembly.
Background
The proportional valve is a device for controlling the flow and pressure of fluid. On the common pressure valve, flow valve and direction valve, the proportional electromagnet is used to replace the original control part, and the pressure, flow or direction of fluid is continuously and proportionally controlled according to the input electric signal. The conventional proportional valve is mainly divided into a movable magnet and a movable iron core, and the two proportional valves comprise valve cores, when the valve cores are in an open state, if the pressure in an air outlet cavity is suddenly increased, fluid can flow back into an air inlet cavity from the conventional valve cores, so that the normal use of the proportional valve is seriously affected.
Disclosure of Invention
Based on this, it is necessary to provide a proportional valve and a proportional valve assembly that effectively prevents backflow of fluid.
The technical scheme is as follows:
A proportional valve, comprising: the first valve body is provided with a first inlet cavity, a discharge cavity and a discharge outlet communicated with the first inlet cavity, and the first inlet cavity is communicated with the discharge cavity through a first opening; a valve rod inserted into the first inlet chamber and the outlet chamber, the valve rod being movable up and down in the first inlet chamber and the outlet chamber; the first valve core is positioned in the discharge cavity and is arranged on the valve rod, and the first valve core is used for blocking or opening the first opening; and the sealing edge is arranged on the first valve core, is circumferentially arranged along the first valve core, and can be matched with the periphery of the first opening in a sealing way after being deformed when the first opening is in an open state.
Compared with the background technology, the proportional valve has the beneficial effects that: because the periphery of the first valve core is extended to be provided with the sealing edge, and the sealing edge is matched with the periphery of the first opening in a sealing manner after being deformed, when the pressure in the discharge cavity is increased, the sealing edge is pressed by the pressure to be bent and deformed, the deformed sealing edge can be attached to the periphery of the first opening, the first opening is blocked, fluid is effectively prevented from flowing back into the first inlet cavity from the discharge cavity, and safer operation of the proportional valve is ensured.
In one embodiment, a groove is formed in a side surface of the sealing edge, which faces the valve rod, and the groove is formed along the circumferential direction of the first valve core. Therefore, the sealing edge is better attached to the periphery of the first opening, and the proportional valve can better realize backflow prevention function.
In one embodiment, a first slot is formed in the first valve core, a first protrusion is formed in a slot wall of the first slot, a first clamping groove is formed in the side face of the valve rod, and when the valve rod is inserted into the first slot, the first protrusion is clamped into the first clamping groove.
In one embodiment, the proportional valve further comprises a diaphragm, the diaphragm is sleeved on the valve rod, and the periphery of the diaphragm is connected to the first valve body.
In one embodiment, a first air vent is formed in the end portion of the valve rod, a second air vent communicated with the first air vent is formed in the side face of the valve rod, and the second air vent and the first valve body are located on two opposite sides of the diaphragm respectively. Therefore, the pressure stability of the air side of the diaphragm is maintained, and the problem that the valve rod is difficult to move due to negative pressure is avoided, so that the proportional valve is opened more smoothly.
In one embodiment, the proportional valve further comprises a first magnetic conduction plate, the first magnetic conduction plate is covered on the diaphragm, and a first guide hole matched with the valve rod in a guide mode is formed in the first magnetic conduction plate.
In one embodiment, the proportional valve further comprises a first driving component and a first elastic piece, the first driving component is in transmission fit with the valve rod, an abutting portion is arranged on the valve rod, the first elastic piece is in abutting fit with the abutting portion, one end of the first elastic piece, which is far away from the abutting portion, is in abutting fit with the cavity wall of the first inlet cavity or the cavity wall of the outlet cavity, and the first valve core is used for blocking the first opening through the first elastic piece.
In one embodiment, the first driving assembly includes a first bracket, a first coil, a first fixed shaft and a first moving shaft, the first fixed shaft is disposed on the first bracket, the first moving shaft is located in the first coil, the first moving shaft can move up and down in the first coil, and the first moving shaft is respectively in interference fit with the first fixed shaft and the valve rod.
In one embodiment, the first moving shaft is provided with a first through hole, and the first through hole is arranged along the axial direction of the first moving shaft. Therefore, the first movable shaft is designed into a hollow structure, so that the friction resistance in the movement process of the first movable shaft is reduced, the valve rod is more flexible to move, and the control performance is better.
In one embodiment, the first fixed shaft is provided with a second through hole communicated with the first through hole, and the second through hole is also used for being communicated with the atmosphere.
In one embodiment, the valve rod is provided with an abutting convex part, and when the valve rod penetrates into the first through hole, the abutting convex part is in abutting fit with the first movable shaft.
In one embodiment, the first driving assembly further comprises a first guide sleeve, the first coil is sleeved outside the first guide sleeve, and the first moving shaft is located in the first guide sleeve. Thus, the first moving shaft moves more smoothly
In one embodiment, the valve rod is provided with a limiting part, the limiting part is located in the first entering cavity, and the limiting part is in limiting fit with the cavity wall of the first entering cavity.
The proportional valve assembly comprises a control valve and the proportional valve, wherein the control valve comprises a control valve body and a second valve body connected with the first valve body, a second inlet cavity and a valve inlet communicated with the second inlet cavity through a second opening are arranged on the second valve body, the second inlet cavity is communicated with the first inlet cavity, and the control valve body is used for blocking or opening the second opening.
Compared with the background technology, the proportional valve assembly has the beneficial effects that: because the periphery of the first valve core is extended to be provided with the sealing edge, and the sealing edge is matched with the periphery of the first opening in a sealing manner after being deformed, when the pressure in the discharge cavity is increased, the sealing edge is pressed by the pressure to be bent and deformed, the deformed sealing edge can be attached to the periphery of the first opening, the first opening is blocked, fluid is effectively prevented from flowing back into the first inlet cavity from the discharge cavity, and safer operation of the proportional valve is ensured. Meanwhile, a control valve is arranged on the proportional valve, and the aim is to increase the sealing effect of the proportional valve through the control valve.
Drawings
FIG. 1 is a schematic diagram of a proportional valve assembly according to an embodiment of the present invention;
FIG. 2 is an exploded view of a proportional valve assembly according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a proportional valve assembly according to an embodiment of the present invention;
FIG. 4 is another cross-sectional view of a proportional valve assembly according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of a valve stem, diaphragm and first valve element according to an embodiment of the present invention.
Reference numerals illustrate:
100. The proportional valve, 110, the first valve body, 111, the first inlet chamber, 112, the outlet chamber, 113, the outlet port, 114, the first opening, 115, the second mounting groove, 120, the valve stem, 121, the first air hole, 122, the second air hole, 123, the interference part, 124, the limit part, 125, the first mounting groove, 126, the first clamping groove, 127, the interference convex part, 130, the first valve core, 131, the first slot, 132, the first convex, 140, the diaphragm, 141, the mounting convex, 150, the first driving component, 151, the first bracket, 152, the first dead axle, 1521, the second through hole, 153, the first moving axle, 1531, the first through hole, 154, the first coil, 155, a first guide sleeve, 160, a first elastic member, 170, a first magnetic guide plate, 171, a first guide hole, 180, a sealing edge, 181, a groove, 200, a control valve, 210, a second valve body, 211, a second inlet chamber, 212, a valve inlet port, 213, a second opening, 220, a second movable shaft, 221, a second clamping groove, 230, a second valve core, 231, a second slot, 232, a second protrusion, 233, a cover, 240, a second driving assembly, 241, a second bracket, 242, a second fixed shaft, 243, a second coil, 244, a second guide sleeve, 250, a second elastic member, 260, a second magnetic guide plate, 261, a second guide hole, 270, and a sealing ring.
Detailed Description
The present invention will be further described in detail with reference to the drawings and the detailed description, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The terms "first" and "second" in this specification do not denote a particular quantity or order, but rather are used for distinguishing between similar or identical items.
In one embodiment, referring to fig. 1,2 and 3, a proportional valve 100 comprises: the valve comprises a first valve body 110, a valve rod 120, a first valve core 130 and a sealing edge 180. The first valve body 110 is provided with a first inlet chamber 111, a discharge chamber 112, and a discharge port 113 provided in communication with the first inlet chamber 111. The first inlet chamber 111 is provided in communication with the outlet chamber 112 through a first opening 114. The valve stem 120 is inserted into the first inlet chamber 111 and the outlet chamber 112, and the valve stem 120 can move up and down in the first inlet chamber 111 and the outlet chamber 112. The first valve element 130 is disposed in the discharge chamber 112, and the first valve element 130 is mounted on the valve stem 120, and the first valve element 130 is used to block or open the first opening 114. The sealing edge 180 is disposed on the first spool 130, and the sealing edge 180 is disposed along the circumferential direction of the first spool 130. When the first opening 114 is in an open state, the sealing edge 180 can be in sealing engagement with the periphery of the first opening 114 after being deformed.
In the above-mentioned proportional valve 100, when the first valve core 130 blocks the first opening 114, the first inlet chamber 111 is blocked from the outlet chamber 112, and at this time, fluid cannot enter the outlet chamber 112 from the first inlet chamber 111, so that the proportional valve 100 is in a closed state; when the valve rod 120 is moved, the first valve core 130 is driven by the valve rod 120 to open the first opening 114, so that the first inlet cavity 111 and the outlet cavity 112 are in a communication state, and at this time, fluid enters the outlet cavity 112 from the first inlet cavity 111, so that the proportional valve 100 is in an open state. Because the sealing edge 180 extends from the periphery of the first valve core 130, and after the sealing edge 180 deforms, the sealing edge is in sealing fit with the periphery of the first opening 114, therefore, when the pressure in the discharge cavity 112 increases, the pressure presses the sealing edge 180 to bend and deform, and the deformed sealing edge 180 is attached to the periphery of the first opening 114, so that the first opening 114 is blocked, fluid is effectively prevented from flowing back into the first inlet cavity 111 from the discharge cavity 112, and safer operation of the proportional valve 100 is ensured. Meanwhile, when the first valve core 130 blocks the first opening 114, the sealing edge 180 is also attached to the periphery of the first opening 114, so that when the proportional valve 100 of the embodiment is in the closed state, the first opening 114 is completely blocked by two double-layer sealing of the first valve core 130 and the sealing edge 180, which is beneficial to improving the sealing effect of the proportional valve 100. It should be noted that, the sealing edge 180 is an elastic edge, and when the pressure in the discharge chamber 112 increases, the pressure can squeeze the elastic edge to perform hemming deformation, where the material of the sealing edge 180 may be TPO (polyolefin thermoplastic elastomer), TPU (polyurethane elastomer rubber), TPEE (thermoplastic polyester elastomer) or other elastic materials.
Specifically, the sealing edge 180 extends along the first valve core 130 to form an annular structure, and the diameter of the annular structure gradually increases from one end of the sealing edge 180 near the first valve core 130 to one end of the sealing edge 180 far away from the first valve core 130, so that the sealing edge 180 in this embodiment is reversely buckled on the cavity wall of the discharge cavity 112 in a bowl shape or approximately in a bowl shape, and thus, when the pressure in the discharge cavity 112 increases, the pressure acts on the sealing edge 180, so that the sealing edge 180 is in a shrinkage trend, and the sealing edge 180 is more closely attached to the periphery of the first opening 114. The side surface of the sealing edge 180 in this embodiment may be a conical curved surface, a convex curved surface, or a concave curved surface.
Specifically, the periphery of the first valve core 130 extends outwards to form the sealing edge 180, that is, the sealing edge 180 and the first valve core 130 are integrally formed, so that the bonding strength between the first valve core 130 and the sealing edge 180 is improved, and the stability of the overall structure of the proportional valve 100 is improved. And simultaneously, the production efficiency of the first valve core 130 and the sealing edge 180 is improved.
Further, a groove 181 is provided on a side of the sealing edge 180 facing the valve stem 120. The groove 181 is provided along the circumferential direction of the first spool 130. Therefore, in this embodiment, the groove 181 is disposed on a side of the sealing edge 180 facing the valve stem 120, so that the sealing edge 180 is easier to bend and deform towards the valve stem 120, and the sealing edge 180 is better attached to the periphery of the first opening 114, so that the proportional valve 100 can better realize the backflow prevention function.
In one embodiment, referring to fig. 2 and 5, a first slot 131 is formed on the first valve core 130, and a first protrusion 132 is formed on a wall of the first slot 131. The side surface of the valve rod 120 is provided with a first clamping groove 126, and when the valve rod 120 is inserted into the first slot 131, the first protrusion 132 is clamped into the first clamping groove 126. Therefore, in the process of installing the first valve core 130, only the valve rod 120 is required to be inserted into the first slot 131, and the first protrusion 132 is required to be clamped into the first clamping groove 126, so that the installation operation of the first valve core 130 is facilitated, and the assembly efficiency of the proportional valve 100 is greatly improved. Specifically in the present embodiment, the first protrusion 132 is provided on the groove wall of the first slot 131 along the circumferential direction of the first spool 130; meanwhile, the first clamping groove 126 is provided along the circumferential direction of the valve stem 120.
In one embodiment, the proportional valve 100 further includes a diaphragm 140. The diaphragm 140 is sleeved on the valve rod 120, and the periphery of the diaphragm 140 is connected to the first valve body 110. The diaphragm 140 is disposed between the valve stem 120 and the first valve body 110 in this embodiment, and covers the gap between the valve stem 120 and the first valve body 110, so as to prevent the fluid in the first inlet chamber 111 from seeping out from the gap between the valve stem 120 and the first valve body 110. Specifically, in this embodiment, the valve rod 120 is provided with a first mounting groove 125, the diaphragm 140 is mounted in the first mounting groove 125, meanwhile, the first valve body 110 is provided with a second mounting groove 115, the diaphragm 140 is provided with a mounting protrusion 141, and the mounting protrusion 141 is mounted in the second mounting groove 115. Wherein, the first mounting groove 125 is disposed along the circumferential direction of the valve stem 120, and the mounting protrusion 141 is disposed along the circumferential direction of the diaphragm 140, and at this time, the corresponding second mounting groove 115 is an annular groove.
Further, a first air vent 121 is provided at an end of the valve rod 120, and a second air vent 122 communicating with the first air vent 121 is provided at a side surface of the valve rod 120, and the second air vent 122 and the first valve body 110 are respectively located at two opposite sides of the diaphragm 140. During operation of the proportional valve 100, fluid is provided on one side of the diaphragm 140, air is provided on the other side of the diaphragm 140, and when the proportional valve 100 is opened, the diaphragm 140 moves along with the valve stem 120, so that the space on the air side is enlarged, and negative pressure is easily formed on one side of the diaphragm 140. In this embodiment, the end of the valve rod 120 is provided with the first air vent 121, the side surface of the valve rod is provided with the second air vent 122, air is sequentially sucked from the first air vent 121 and the second air vent 122 through the second air vent 122 and the first air vent 121, and air is supplemented to one side of the diaphragm 140, so that the pressure stability of the air side of the diaphragm 140 is maintained, the valve rod 120 is prevented from being difficult to move due to negative pressure, and the valve rod 120 is provided with the first air vent 121 and the second air vent 122, so that the proportional valve 100 is opened more smoothly.
In one embodiment, referring to fig. 2 and 4, the proportional valve 100 further includes a first magnetic conductive plate 170, the first magnetic conductive plate 170 is disposed on the diaphragm 140, and a first guiding hole 171 is disposed on the first magnetic conductive plate 170 and is in guiding fit with the valve stem 120. As can be seen from the above, the valve rod 120 is stably moved up and down in the first guiding hole 171 by the first magnetic conductive plate 170 in this embodiment, so that the proportional valve 100 is opened and closed more stably and smoothly. Meanwhile, the periphery of the diaphragm 140 is fixed on the first valve body 110 through the first magnetic conduction plate 170, so that the diaphragm 140 is prevented from being separated from the first valve body 110 due to the fact that the diaphragm 140 moves along with the valve rod 120, and the diaphragm 140 is beneficial to achieving a stable isolation effect.
In one embodiment, referring to fig. 2, the proportional valve 100 further includes a first driving component 150 and a first elastic member 160. The first drive assembly 150 is in driving engagement with the valve stem 120. The valve rod 120 is provided with a contact portion 123. The first elastic member 160 is in interference fit with the interference portion 123. The end of the first elastic member 160 away from the abutting portion 123 abuts against the cavity wall of the first inlet cavity 111 or the cavity wall of the outlet cavity 112, and the first valve core 130 blocks the first opening 114 through the first elastic member 160. As can be seen, the proportional valve 100 of the present embodiment works in the following manner: in the initial state, one end of the first elastic member 160 abuts against the abutting portion 123, and the other end of the first elastic member 160 abuts against the cavity wall of the first inlet cavity 111 or the cavity wall of the outlet cavity 112, at this time, the first valve element 130 abuts against the cavity wall of the outlet cavity 112 under the action of the first elastic member 160, that is, the first valve element 130 blocks the first opening 114; when the first driving assembly 150 is started, the first driving assembly 150 acts on the valve rod 120 to push, and if the pushing force is greater than the elastic force of the first elastic member 160, the valve rod 120 drives the first valve core 130 to move, and at this time, the first opening 114 is in an open state, i.e. the proportional valve 100 is in a working state; since the valve rod 120 moves to compress the first elastic member 160, the elastic force of the first elastic member 160 increases, and if the elastic force of the first elastic member 160 increases to be equal to the pushing force, the first valve core 130 remains stationary, thus maintaining the stable output of the fluid. The first driving component 150 may be a moving magnet electromagnet or a moving iron core electromagnet. Meanwhile, the first elastic member 160 may be a spring or elastic rubber. It should be noted that the first elastic member 160 of the present embodiment may be located in the first inlet chamber 111 or in the outlet chamber 112. In this embodiment, the first elastic member 160 is a spring, the spring is located in the first entering cavity 111, the spring is sleeved on the valve rod 120, one end of the spring abuts against the abutting portion 123, and the other end of the spring abuts against the cavity wall of the first entering cavity 111.
Further, the first driving assembly 150 includes a first bracket 151, a first coil 154, a first fixed shaft 152, and a first moving shaft 153. The first fixed shaft 152 is provided on the first bracket 151. The first moving shaft 153 is located in the first coil 154, and the first moving shaft 153 can move up and down in the first coil 154, and the first moving shaft 153 is in interference fit with the first fixed shaft 152 and the valve rod 120 respectively. Therefore, when the proportional valve 100 is operated, the first coil 154 is energized, the electromagnetic force generated by the first coil 154 drives the first moving shaft 153 to move, and if the electromagnetic force is greater than the elastic force of the first elastic member 160, the first moving shaft 153 drives the valve rod 120 to move together and compresses the first elastic member 160, so that the first valve core 130 is separated from the first opening 114, and the first opening 114 is opened. Meanwhile, in the present embodiment, the first fixed shaft 152 is disposed on the first bracket 151, so that the first moving shaft 153 moves up and down between the first fixed shaft 152 and the valve rod 120, which effectively limits the moving range of the first moving shaft 153, and is beneficial to the safe operation of the first driving assembly 150. Note that, in the present embodiment, the material of the first shaft 153 is a magnetic conductive material.
Further, referring to fig. 3, a first through hole 1531 is provided on the first shaft 153. The first through hole 1531 is provided along the axial direction of the first moving shaft 153. Therefore, the first moving shaft 153 of the present embodiment is hollow, and the first moving shaft 153 is designed to be hollow, so that the friction resistance in the moving process of the first moving shaft 153 is reduced, and the valve rod 120 can move more flexibly and has better control performance. Meanwhile, the first moving shaft 153 is designed to be of a hollow structure, so that the overall gravity of the first moving shaft 153 is reduced, the electromagnetic force generated by the first coil 154 is facilitated to push the first moving shaft 153 to move, and the energy consumption of the first coil 154 is reduced. In addition, the first shaft 153 with a hollow structure can form a special magnetic circuit to meet the magnetic force change requirement.
In one embodiment, the first fixing shaft 152 is provided with a second through hole 1521 disposed in communication with the first through hole 1531. The second through hole 1521 is also for communication with the atmosphere. In this way, the inside of the first coil 154 is communicated with the atmosphere through the second through hole 1521, so that the pressure in the first coil 154 is maintained stable, and the air resistance of the first moving shaft 153 moving in the first coil 154 is greatly reduced.
In one embodiment, referring to fig. 3 and 5, the valve rod 120 is provided with a protrusion 127. When the valve rod 120 is inserted into the first through hole 1531, the interference protrusion 127 is in interference fit with the first moving shaft 153. In this way, the first shaft 153 is sleeved on the valve rod 120 through the first through hole 1531, so that the first shaft 153 is prevented from shaking left and right in the process of pushing the valve rod 120, and the first shaft 153 is beneficial to pushing the valve rod 120 to move up and down more stably.
In another embodiment, the interference fit between the first shaft 153 and the valve stem 120 may be: the end of the first shaft 153 is in direct interference fit with the end of the valve stem 120; or the first moving shaft 153 is inserted into the valve stem 120, and the end of the first moving shaft 153 is in interference fit with the protruding structure in the valve stem 120; or the first moving shaft 153 is fixedly connected with the valve rod 120.
In one embodiment, the first driving assembly 150 further includes a first guide sleeve 155, the first coil 154 is sleeved outside the first guide sleeve 155, and the first moving shaft 153 is located in the first guide sleeve 155. In this way, the first moving shaft 153 moves more smoothly through the first guide sleeve 155. Specifically, in the present embodiment, the first guide sleeve 155 is sleeved on the valve rod 120, and the first guide sleeve 155 is covered on the diaphragm 140.
In one embodiment, the valve stem 120 is provided with a stop 124. The limiting portion 124 is located in the first access cavity 111, and the limiting portion 124 is in limiting fit with a cavity wall of the first access cavity 111. Thus, the movement range of the valve rod 120 is limited by the limiting part 124, so that the first valve core 130 is prevented from directly striking the cavity wall of the discharge cavity 112 due to excessive movement of the valve rod 120.
Further, when the limiting portion 124 is in limiting engagement with the cavity wall of the first access cavity 111, the sealing edge 180 can be in sealing engagement with the periphery of the first opening 114 after being deformed, so that the sealing edge 180 cannot be adhered to the periphery of the first opening 114 due to excessive movement of the valve rod 120 is avoided.
In one embodiment, referring to fig. 1,2 and 3, a proportional valve assembly includes a control valve 200 and the proportional valve 100 of any of the above embodiments. The control valve 200 includes a control valve body and a second valve body 210 connected to the first valve body 110. The second valve body 210 is provided with a second inlet cavity 211 and a valve inlet 212 communicated with the second inlet cavity 211 through a second opening 213, the second inlet cavity 211 is also communicated with the first inlet cavity 111, and the control valve body is used for blocking or opening the second opening 213.
In the above-mentioned proportional valve assembly, the opening and closing states of the second opening 213 are controlled by controlling the valve body, so that the condition of fluid entering the proportional valve 100 is accurately controlled. When the second opening 213 is in an open state, fluid enters the valve inlet 212 from the second inlet chamber 211, and when the first valve core 130 blocks the first opening 114, the first inlet chamber 111 is blocked from the outlet chamber 112, and at this time, fluid cannot enter the outlet chamber 112 from the first inlet chamber 111, so that the proportional valve 100 is in a closed state; when the valve rod 120 is moved, the first valve core 130 is driven by the valve rod 120 to open the first opening 114, so that the first inlet cavity 111 and the outlet cavity 112 are in a communication state, at this time, fluid then enters the outlet cavity 112 from the first inlet cavity 111, and thus, the proportional valve 100 is in an open state. Because the sealing edge 180 extends from the periphery of the first valve core 130, and after the sealing edge 180 deforms, the sealing edge 180 is in sealing fit with the periphery of the first opening 114, so that when the pressure in the discharge cavity 112 increases, the pressure presses the sealing edge 180 to bend and deform, and the deformed sealing edge 180 is attached to the periphery of the discharge port 113, so that the discharge port 113 is blocked, fluid is effectively prevented from flowing back into the first inlet cavity 111 from the discharge cavity 112, and safer operation of the proportional valve 100 is ensured. Meanwhile, a control valve is provided on the proportional valve 100 for the purpose of increasing the sealing effect of the proportional valve 100 by the control valve. In particular, in the present embodiment, the first valve body 110 and the second valve body 210 are integrally formed. The control valve 200 may be a proportional valve 100, a shut-off valve, a butterfly valve, a shut-off valve, or other control valve 200.
Further, the control valve body includes a second moving shaft 220 and a second spool 230. The second spool 230 is located in the second inlet chamber 211, and the second spool 230 is used to block or open the second opening 213. The second moving shaft 220 is inserted into the second inlet chamber 211 and connected to the second spool 230, and the second moving shaft 220 can move up and down in the second inlet chamber 211. As can be seen, when the second valve core 230 blocks the second opening 213, the second inlet chamber 211 is blocked from the valve inlet 212, and at this time, fluid cannot enter the second inlet chamber 211 from the valve inlet 212, so that the control valve 200 is in a closed state; when the second moving shaft 220 is moved, the second valve core 230 is driven by the second moving shaft 220 to open the second opening 213, so that the second inlet chamber 211 is in communication with the valve inlet 212, and at this time, fluid enters the second inlet chamber 211 from the valve inlet 212, so that the control valve 200 is in an open state. It should be noted that, the material of the second moving shaft 220 in this embodiment is a magnetic conductive material.
Further, the second spool 230 is provided with a second slot 231, and a second protrusion 232 is provided on a slot wall of the second slot 231. The second moving shaft 220 is provided with a second clamping groove 221 on a side surface, and when the second moving shaft 220 is inserted into the second insertion groove 231, the second protrusion 232 is clamped into the second clamping groove 221. In this way, the installation operation of the second spool 230 is greatly facilitated, which is advantageous for improving the assembly efficiency of the control valve 200. Specifically, in the present embodiment, the second protrusion 232 is provided on the groove wall of the second insertion groove 231 along the circumferential direction of the second spool 230; meanwhile, the second catching groove 221 is disposed along the circumferential direction of the second moving shaft 220.
In one embodiment, the control valve body further includes a second drive assembly 240 and a second resilient member 250. The second drive assembly 240 is in driving engagement with the second shaft 220. One end of the second elastic member 250 abuts against the cavity wall of the second inlet cavity 211, and the other end of the second elastic member 250 abuts against the second moving shaft 220 or the second spool 230. The second spool 230 blocks the second opening 213 by the second elastic member 250. As can be seen, the control valve 200 of the present embodiment works in the following manner: in the initial state, one end of the second elastic member 250 abuts against the wall of the second inlet cavity 211, and the other end of the second elastic member 250 abuts against the second moving shaft 220 or the second valve core 230, at this time, the second valve core 230 abuts against the wall of the second inlet cavity 211 under the action of the second elastic member 250, that is, the second valve core 230 blocks the second opening 213; when the second driving assembly 240 is started, the second driving assembly 240 acts on the second moving shaft 220 to push, and if the pushing force is greater than the elastic force of the second elastic member 250, the second moving shaft 220 drives the second valve core 230 to move, and at this time, the second opening 213 is in an open state, i.e. the control valve 200 is in a working state; since the second moving shaft 220 moves to compress the second elastic member 250, the elastic force of the second elastic member 250 increases, and if the pushing force is equal to the elastic force of the second elastic member 250, the second valve element 230 remains stationary, so that the fluid is stably output. The second driving component 240 may be a moving magnet electromagnet or a moving iron core electromagnet. Meanwhile, the second elastic member 250 may be a spring or elastic rubber. In this embodiment, the second elastic member 250 is a spring, the spring is located in the second inlet cavity 211, the spring is sleeved on the second moving shaft 220, one end of the spring abuts against the second valve core 230, and the other end of the spring abuts against the cavity wall of the second inlet cavity 211. In addition, in order to avoid the spring acting directly on the second valve core 230, a cover 233 is sleeved on the second valve core 230, and one end of the spring abuts against the cover 233.
Further, the second driving assembly 240 includes a second bracket 241, a second coil 243, and a second fixed shaft 242. The second fixed shaft 242 is provided on the second bracket 241. The second moving shaft 220 is located in the second coil 243, and the second moving shaft 220 can move up and down in the second coil 243, and the second moving shaft 220 is in interference fit with the second fixed shaft 242, respectively. In particular, in the present embodiment, the second driving assembly 240 further includes a second guide sleeve 244, the second coil 243 is sleeved outside the second guide sleeve 244, and the second moving shaft 220 is located in the second guide sleeve 244. In this way, the second moving shaft 220 moves more smoothly through the second guide sleeve 244. Meanwhile, the second guide sleeve 244 abuts against the second valve body 210, and a sealing ring 270 is disposed between the second guide sleeve 244 and the second valve body 210. Further, the second bracket 241 of the present embodiment is integrally structured with the first bracket 151.
In one embodiment, the control valve 200 further includes a second magnetic conductive plate 260, where the second magnetic conductive plate 260 covers the second valve body 210, and a second guiding hole 261 that is in guiding fit with the second moving shaft 220 is provided on the second magnetic conductive plate 260. As can be seen, the second moving shaft 220 is stabilized to move up and down in the second guiding hole 261 by the second magnetic conductive plate 260 in this embodiment, so that the control valve 200 is opened and closed more stably and smoothly. In this embodiment, the second magnetic conductive plate 260 and the first magnetic conductive plate 170 are integrally formed.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A proportional valve, comprising:
The valve comprises a first valve body (110), wherein a first inlet cavity (111), a discharge cavity (112) and a discharge outlet (113) which is communicated with the first inlet cavity (111) are arranged on the first valve body (110), and the first inlet cavity (111) is communicated with the discharge cavity (112) through a first opening (114);
-a valve stem (120), the valve stem (120) being inserted into the first inlet chamber (111) and the outlet chamber (112), the valve stem (120) being movable up and down in the first inlet chamber (111) and the outlet chamber (112);
A first valve core (130), wherein the first valve core (130) is positioned in the discharge cavity (112), the first valve core (130) is arranged on the valve rod (120), and the first valve core (130) is used for blocking or opening the first opening (114); and
The sealing edge (180), the sealing edge (180) is arranged on the first valve core (130), and the sealing edge (180) is arranged along the circumference of the first valve core (130), when the first opening (114) is in an open state, the sealing edge (180) can be matched with the periphery of the first opening (114) in a sealing way after being deformed.
2. The proportional valve according to claim 1, characterized in that a groove (181) is provided on a side of the sealing edge (180) facing the valve stem (120), the groove (181) being provided along a circumferential direction of the first spool (130).
3. The proportioning valve of claim 1 further comprising a diaphragm (140), said diaphragm (140) being sleeved on said valve stem (120), and said diaphragm (140) being peripherally attached to said first valve body (110).
4. A proportional valve as claimed in claim 3, wherein a first air vent (121) is provided at an end of the valve stem (120), and a second air vent (122) communicating with the first air vent (121) is provided at a side surface of the valve stem (120), the second air vent (122) and the first valve body (110) being located at opposite sides of the diaphragm (140), respectively.
5. The proportional valve according to claim 1, further comprising a first driving assembly (150) and a first elastic member (160), wherein the first driving assembly (150) is in transmission fit with the valve rod (120), an abutting portion (123) is arranged on the valve rod (120), the first elastic member (160) is in abutting fit with the abutting portion (123), one end, away from the abutting portion (123), of the first elastic member (160) is in abutting fit with a cavity wall of the first inlet cavity (111) or a cavity wall of the outlet cavity (112), and the first valve core (130) blocks the first opening (114) through the first elastic member (160).
6. The proportioning valve of claim 5 wherein said first drive assembly (150) comprises a first bracket (151), a first coil (154), a first fixed shaft (152) and a first moving shaft (153), said first fixed shaft (152) being disposed on said first bracket (151), said first moving shaft (153) being disposed within said first coil (154), and said first moving shaft (153) being movable up and down within said first coil (154), said first moving shaft (153) being in interference fit with said first fixed shaft (152) and said valve stem (120), respectively.
7. The proportional valve according to claim 6, wherein a first through hole (1531) is provided in the first moving shaft (153), and the first through hole (1531) is provided along an axial direction of the first moving shaft (153).
8. The proportional valve of claim 7, wherein the first fixed shaft (152) is provided with a second through hole (1521) which is communicated with the first through hole (1531), and the second through hole (1521) is further used for communication with the atmosphere.
9. The proportional valve as claimed in any one of claims 1 to 8, wherein a limiting portion (124) is provided on the valve stem (120), the limiting portion (124) is located in the first inlet chamber (111), and the limiting portion (124) is in limiting fit with a chamber wall of the first inlet chamber (111).
10. A proportional valve assembly, characterized by comprising a control valve (200) and a proportional valve (100) according to any one of claims 1-9, wherein the control valve (200) comprises a control valve body and a second valve body (210) connected with the first valve body (110), a second inlet cavity (211) and a valve inlet (212) communicated with the second inlet cavity (211) through a second opening (213) are arranged on the second valve body (210), the second inlet cavity (211) is also communicated with the first inlet cavity (111), and the control valve body is used for blocking or opening the second opening (213).
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| CN201910531728.XA CN110242756B (en) | 2019-06-19 | 2019-06-19 | Proportional valve and proportional valve assembly |
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| CN201910531728.XA CN110242756B (en) | 2019-06-19 | 2019-06-19 | Proportional valve and proportional valve assembly |
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| CN112460268B (en) * | 2020-11-25 | 2022-03-08 | 宁波方太厨具有限公司 | Proportional valve and gas water heater comprising same |
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| JP3125831B2 (en) * | 1993-09-24 | 2001-01-22 | 日立プラント建設株式会社 | High airtight metal sheet damper |
| CN2303141Y (en) * | 1997-03-28 | 1999-01-06 | 中国人民解放军后勤工程学院 | Magnetic control oscillation type breather valve |
| CN202971154U (en) * | 2012-11-19 | 2013-06-05 | 周如景 | Micro diaphragm pump piston valve |
| CN105757317B (en) * | 2016-04-11 | 2018-08-31 | 北京恒兴利达仪器有限公司 | A kind of high-voltage bidirectional big orifice solenoid valve and control method |
| CN108374928B (en) * | 2018-05-07 | 2023-12-05 | 金华市德诺电器有限公司 | Electromagnetic valve |
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