Electromagnetic valve with pressure compensation

Abstract

The utility model provides an electromagnetic valve with a pressure compensation function. The electromagnetic valve comprises a yoke cylinder, a valve body, an electromagnetic coil assembly and a movable iron core assembly. The yoke cylinder and the valve body are connected in a sleeved mode to form a valve cavity, a static iron core column body axially extends in the yoke cylinder, the electromagnetic coil assembly surrounds the periphery of the static iron core column body, the movable iron core assembly is elastically and movably arranged in the valve cavity, and a first valve hole is formed in the valve body. The movable iron core assembly comprises a movable iron core body and a sealing plug, a pressure compensation cavity is formed in the static iron core column body, the movable iron core assembly is in sliding sealing connection with the pressure compensation cavity, the movable iron core assembly comprises a through hole penetrating through the movable iron core body and the sealing plug, and the through hole can communicate with the first valve hole and the pressure compensation cavity. According to the electromagnetic valve with the pressure compensation function, the pressure compensation cavity is arranged, the pressure on the upper portion and the lower portion of the movable iron core assembly can be balanced, the elastic piece only needs small elastic performance, the power of the electromagnetic assembly can be smaller, power consumption is low, more energy is saved, cost is low, the sealing requirement for the sealing plug is smaller, and the service life is longer.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic valves, in particular to an electromagnetic valve with pressure compensation. Background Art

[0002] At present. Solenoid valves are industrial equipment controlled by electromagnetics. They are basic automation components used to control fluids. They are not limited to the hydraulic or pneumatic fields. They are widely used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. The solenoid valve drives the valve core assembly to switch the fluid on and off or switch direction by means of the electromagnetic force generated by the electromagnetic coil and the elastic force of the elastic part. In the prior art, due to the large pressure difference between the upper and lower parts of the valve core assembly, it is necessary to equip it with elastic parts with greater elastic performance and electromagnetic components with greater power, which is costly and power-hungry, and at the same time, has high requirements for the sealing of the valve core assembly.

[0003] Therefore, it is necessary to provide a solenoid valve with pressure compensation to solve the above technical problems. Utility Model Content

[0004] The utility model provides a solenoid valve with pressure compensation to solve the problem that the solenoid valve in the prior art needs to be equipped with elastic parts with greater elasticity and electromagnetic components with greater power, which results in high cost and high power consumption, and has high requirements on the sealing of the valve core component.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a solenoid valve with pressure compensation, which includes: a yoke iron cylinder, a valve body, an electromagnetic coil assembly, and a moving iron core assembly;

[0006] The yoke iron cylinder and the valve body are sleeved, a valve cavity is formed between the yoke iron cylinder and the valve body, a static iron core column is axially extended in the yoke iron cylinder, the electromagnetic coil assembly is arranged in the yoke iron cylinder and surrounds the outer circumference of the static iron core column, the movable iron core assembly is elastically movably arranged in the valve cavity, and a first valve hole connecting the valve cavity and the external space is arranged on the valve body;

[0007] The moving iron core assembly includes a moving iron core body and a sealing plug arranged on the moving iron core body, the sealing plug is used to seal the first valve hole, a pressure compensation cavity is arranged on the static iron core column, the moving iron core assembly is slidingly and sealingly connected to the pressure compensation cavity, the moving iron core assembly includes a through hole passing through the moving iron core body and the sealing plug, and the through hole can connect the first valve hole and the pressure compensation cavity.

[0008] In the utility model, an extension column is provided on one side of the moving iron core body, one end of the extension column away from the moving iron core body is slidingly and sealingly connected to the pressure compensation cavity, and the through hole passes through the extension column.

[0009] Among them, the pressure compensation cavity is provided with a accommodating cavity at one end close to the core assembly, and a sealing ring and a fixing block are arranged in the accommodating cavity. The fixing block restricts the sealing ring in the accommodating cavity, and the extension column passes through the fixing block and the sealing ring.

[0010] In addition, the extension column penetrates into the interior of the sealing plug, and the sealing plug and the extension column are interference-fitted.

[0011] Furthermore, the moving iron core assembly also includes a spring sheet and a clamping ring, the clamping ring is fixedly connected to the outer periphery of the extension column, the spring sheet is limited between the clamping ring and the moving iron core body, and the sealing plug is located on a side of the clamping ring away from the spring sheet.

[0012] In the utility model, a sleeve is arranged in the yoke cylinder, and the moving iron core body is slidably matched with the inner wall of the sleeve.

[0013] In the utility model, the distance between the extension column and a side of the pressure compensation chamber away from the valve body is greater than the distance between the moving iron core body and a side of the valve chamber away from the valve body.

[0014] In the utility model, a second valve hole communicating with the valve cavity and the external space is provided on the valve body or the yoke iron cylinder.

[0015] In the utility model, an elastic sealing diaphragm is provided on the outer periphery of one end of the extension column away from the moving iron core body, and an accommodating cavity is provided on one end of the pressure compensation cavity close to the iron core assembly. The elastic sealing diaphragm is located in the accommodating cavity, and the periphery of the elastic sealing diaphragm is pressed into the accommodating cavity by a fixing block, thereby closing the pressure compensation cavity.

[0016] In the utility model, a clamping ring sleeve is detachably connected to one end of the moving iron core body close to the valve body, the sealing plug is limited between the moving iron core body and the clamping ring sleeve, and a spring piece is clamped and fixed between the clamping ring sleeve and the moving iron core body.

[0017] Compared with the prior art, the utility model has the following beneficial effects: the solenoid valve with pressure compensation of the utility model can balance the pressure above and below the moving iron core assembly by setting a pressure compensation chamber. The spring piece only needs smaller elastic performance, the power of the electromagnetic assembly can also be smaller, the power consumption is low, the energy saving is more energy-saving, the cost is low, the sealing requirements for the sealing plug are smaller, and the service life is longer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the utility model.

[0019] Figure 1 It is a structural schematic diagram of the first embodiment of the solenoid valve with pressure compensation of the utility model.

[0020] Figure 2 The utility model is a schematic structural diagram of a solenoid valve with pressure compensation, in which an elastic sealing diaphragm is used to seal a pressure compensation chamber.

[0021] Figure 3 It is a structural schematic diagram of the second embodiment of the solenoid valve with pressure compensation of the utility model. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0023] Directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are only used for reference to the directions of the drawings. The directional terms used are used to illustrate and understand the present invention, and are not used to limit the present invention.

[0024] The words "first", "second" and the like in the terminology of the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be construed as limiting the order of precedence.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, the connection can be a detachable connection or a connection of an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the prior art, due to the large pressure difference between the upper and lower parts of the valve core assembly, an elastic member with greater elasticity and an electromagnetic assembly with greater power are required, which results in high cost and power consumption, and also places high requirements on the sealing of the valve core assembly.

[0027] The following is a first embodiment of a solenoid valve with pressure compensation provided by the utility model that can solve the above technical problems.

[0028] Please refer to Figure 1 ,in Figure 1 It is a structural schematic diagram of the first embodiment of the solenoid valve with pressure compensation of the utility model.

[0029] In the figures, structurally similar elements are denoted by the same reference numerals.

[0030] The utility model provides a solenoid valve with pressure compensation, which comprises: a yoke iron cylinder 11, a valve body 12, an electromagnetic coil component 13, and a moving iron core component.

[0031] The yoke cylinder 11 and the valve body 12 are sleeved to form a valve cavity between the yoke cylinder 11 and the valve body 12. A static iron core column 111 extends axially in the yoke cylinder 11. The electromagnetic coil assembly 13 is arranged in the yoke cylinder 11 and surrounds the outer circumference of the static iron core column 111. The moving iron core assembly is elastically and movably arranged in the valve cavity. The valve body 12 is provided with a first valve hole 121 connecting the valve cavity and the external space.

[0032] The moving iron core assembly includes a moving iron core body 141 and a sealing plug 142 arranged on the moving iron core body 141, the sealing plug 142 is used to seal the first valve hole 121, a pressure compensation chamber 1111 is arranged on the static iron core column 111, the moving iron core assembly is slidingly and sealingly connected to the pressure compensation chamber 1111, and the moving iron core assembly includes a through hole 1431 that passes through the moving iron core body 141 and the sealing plug 142, and the through hole 1431 can connect the first valve hole 121 and the pressure compensation chamber 1111.

[0033] Specifically, in this embodiment, an extension column 143 is provided on one side of the moving iron core body 141 , one end of the extension column 143 away from the moving iron core body 141 is slidingly and sealingly connected to the pressure compensation cavity 1111 , and the through hole 1431 passes through the extension column 143 .

[0034] Among them, a accommodating chamber is provided at one end of the pressure compensation chamber 1111 close to the core assembly, and a sealing ring 15 and a fixing block 16 are provided in the accommodating chamber. The fixing block 16 restricts the sealing ring 15 in the accommodating chamber, and the extension column 143 passes through the fixing block 16 and the sealing ring 15, so that a movable seal is formed between the extension column 143 and the pressure compensation chamber 1111.

[0035] In this embodiment, the extension column 143 penetrates into the sealing plug 142, and the sealing plug 142 is sleeved with the extension column 143. The end of the extension column 143 away from the pressure compensation chamber 1111 may have a larger outer diameter, thereby limiting the sealing plug 142 from detaching from the extension column 143.

[0036] In this embodiment, the extension column 143 and the moving iron core body 141 can be an integrally formed structure or a separate structure.

[0037] In this embodiment, the moving iron core assembly further includes a spring piece 144 and a clamping ring 145. The clamping ring 145 is fixedly connected to the outer periphery of the extension column 143. The fixed connection method can be welding, interference sleeve connection, clamping, etc. The spring piece 144 is limited between the clamping ring 145 and the moving iron core body 141, and the sealing plug 142 is located on the side of the clamping ring 145 away from the spring piece 144.

[0038] In this embodiment, the distance between the extension column 143 and the side of the pressure compensation chamber 1111 away from the valve body 12 is greater than the distance between the moving iron core body 141 and the side of the valve chamber away from the valve body 12, so that when the moving iron core body 141 moves up and down, there is always a residual space between the extension column 143 and the pressure compensation chamber 1111.

[0039] In this embodiment, a second valve hole 122 communicating the valve cavity and the external space is provided on the valve body 12. It is conceivable that the second valve hole 122 can also be provided on the yoke iron cylinder 11, that is, through the static iron core column 111.

[0040] Please refer to Figure 2 Optionally, the sealing ring 15 in this embodiment can also be replaced with an elastic sealing diaphragm 15a, and an elastic sealing diaphragm 15a is provided on the periphery of one end of the extension column 143 away from the moving iron core body 141, and an accommodating cavity is provided on one end of the pressure compensation cavity 1111 close to the iron core assembly, and the elastic sealing diaphragm 15a is located in the accommodating cavity, and the periphery of the elastic sealing diaphragm 15a is pressed and fixed in the accommodating cavity by the fixing block 16, thereby closing the pressure compensation cavity 1111. The extension column 143 will not form friction with the elastic sealing diaphragm 15a, has a long service life, and has little effect on the activity of the iron core assembly.

[0041] The following is a second embodiment of a solenoid valve with pressure compensation provided by the utility model that can solve the above technical problems.

[0042] Please refer to Figure 2 ,in Figure 2 It is a structural schematic diagram of the second embodiment of the solenoid valve with pressure compensation of the utility model.

[0043] The utility model provides a solenoid valve with pressure compensation, which comprises: a solenoid coil assembly 21, a valve body 22, a solenoid coil assembly, and a moving iron core assembly. It should be noted that the solenoid coil assembly 21 in this embodiment is a modular structure in which a coil body and a plastic component are integrated.

[0044] The electromagnetic coil assembly 21 and the valve body 22 are sleeved to form a valve cavity between the electromagnetic coil assembly 21 and the valve body 22. A static iron core column 211 extends axially in the electromagnetic coil assembly 21. The moving iron core assembly is elastically and movably arranged in the valve cavity. The valve body 22 is provided with a first valve hole 221 connecting the valve cavity and the external space.

[0045] The moving iron core assembly includes a moving iron core body 241 and a sealing plug 242 arranged on the moving iron core body 241, the sealing plug 242 is used to seal the first valve hole 221, a pressure compensation chamber 2111 is arranged on the static iron core column 211, the moving iron core assembly is slidingly and sealingly connected to the pressure compensation chamber 2111, and the moving iron core assembly includes a through hole 2431 that passes through the moving iron core body 241 and the sealing plug 242, and the through hole 2431 can connect the first valve hole 221 and the pressure compensation chamber 2111.

[0046] Specifically, in this embodiment, a sleeve 23 is provided in the electromagnetic coil assembly 21 , and the moving iron core body 241 is slidably matched with the inner wall of the sleeve 23 , so that the moving iron core body 241 can move up and down more stably.

[0047] Furthermore, an extension column 243 may be provided on one side of the moving iron core body 241 , and one end of the extension column 243 away from the moving iron core body 241 is slidably and sealingly connected to the pressure compensation cavity 2111 , and the through hole 2431 passes through the extension column 243 .

[0048] Alternatively, one end of the moving iron core body 241 may be directly connected to the pressure compensation chamber 2111 in a sliding and sealing manner by reasonably setting the outer diameter of the moving iron core body 241 .

[0049] The pressure compensation chamber 2111 is provided with a receiving chamber at one end close to the core assembly, and a sealing ring 25 and a fixing block 26 are provided in the receiving chamber. The fixing block 26 restricts the sealing ring 25 in the receiving chamber, and the extension column 243 penetrates the fixing block 26 and the sealing ring 25, so that a movable seal is formed between the extension column 243 and the pressure compensation chamber 2111.

[0050] In this embodiment, the extension column 243 and the moving iron core body 241 are integrally formed, wherein the extension column 243 penetrates into the interior of the sealing plug 242, and the sealing plug 242 and the extension column 243 are interference-fitted.

[0051] In this embodiment, the distance between the extension column 243 and a surface of the pressure compensation chamber 2111 away from the valve body 22 is greater than the distance between the moving iron core body 241 and a surface of the static iron core column 211 close to the valve body 22 .

[0052] In this embodiment, a second valve hole 222 communicating with the valve cavity and the external space is provided on the valve body 22 or the electromagnetic coil assembly 21 .

[0053] In this embodiment, a retaining ring sleeve 245 is detachably connected to one end of the moving iron core body 241 close to the valve body 22, and the sealing plug 242 is limited between the moving iron core body 241 and the retaining ring sleeve 245. A spring piece 244 is also clamped and fixed between the retaining ring sleeve 245 and the moving iron core body 241.

[0054] The solenoid valve with pressure compensation of the utility model is capable of balancing the pressure above and below the moving iron core assembly by setting a pressure compensation chamber. The spring piece only needs smaller elastic performance, the power of the electromagnetic assembly can be smaller, the power consumption is lower and more energy-saving, the cost is low, and the sealing plug is also easier to seal the first valve hole, the sealing requirements for the sealing plug are smaller, and the service life is longer.

[0055] In summary, although the present invention has been disclosed as above by the above embodiments, the above embodiments are not intended to limit the present invention. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A solenoid valve with pressure compensation, characterized in that: include: Yoke iron cylinder, valve body, electromagnetic coil assembly, and moving iron core assembly; The yoke iron cylinder and the valve body are sleeved, a valve cavity is formed between the yoke iron cylinder and the valve body, a static iron core column is axially extended in the yoke iron cylinder, the electromagnetic coil assembly is arranged in the yoke iron cylinder and surrounds the outer circumference of the static iron core column, the movable iron core assembly is elastically movably arranged in the valve cavity, and a first valve hole connecting the valve cavity and the external space is arranged on the valve body; The moving iron core assembly includes a moving iron core body and a sealing plug arranged on the moving iron core body, the sealing plug is used to seal the first valve hole, a pressure compensation cavity is arranged on the static iron core column, the moving iron core assembly is slidingly and sealingly connected to the pressure compensation cavity, the moving iron core assembly includes a through hole passing through the moving iron core body and the sealing plug, and the through hole can connect the first valve hole and the pressure compensation cavity.

2. The solenoid valve with pressure compensation according to claim 1, characterized in that: An extension column is disposed on one side of the moving iron core body, one end of the extension column away from the moving iron core body is slidably and sealedly connected to the pressure compensation cavity, and the through hole passes through the extension column.

3. The solenoid valve with pressure compensation according to claim 2, characterized in that: The pressure compensation cavity is provided with an accommodating cavity at one end close to the core assembly, and a sealing ring and a fixing block are provided in the accommodating cavity. The fixing block restricts the sealing ring in the accommodating cavity, and the extension column passes through the fixing block and the sealing ring.

4. The solenoid valve with pressure compensation according to claim 2, characterized in that: The extension column penetrates into the interior of the sealing plug, and the sealing plug and the extension column are interference-fitted.

5. The solenoid valve with pressure compensation according to claim 4, characterized in that: The moving iron core assembly also includes a spring sheet and a clamping ring. The clamping ring is fixedly connected to the outer periphery of the extension column. The spring sheet is limited between the clamping ring and the moving iron core body. The sealing plug is located on a side of the clamping ring away from the spring sheet.

6. The solenoid valve with pressure compensation according to any one of claims 1 to 3, characterized in that: A sleeve is arranged in the yoke cylinder, and the moving iron core body is slidably matched with the inner wall of the sleeve.

7. The solenoid valve with pressure compensation according to claim 2, characterized in that: The distance between the extension column and a side of the pressure compensation chamber away from the valve body is greater than the distance between the moving iron core body and a side of the valve chamber away from the valve body.

8. The solenoid valve with pressure compensation according to claim 1, characterized in that: The valve body or the yoke cylinder is provided with a second valve hole communicating with the valve cavity and the external space.

9. The solenoid valve with pressure compensation according to claim 2, characterized in that: An elastic sealing diaphragm is arranged on the outer periphery of one end of the extension column away from the moving iron core body, and an accommodating cavity is arranged on one end of the pressure compensation cavity close to the iron core assembly. The elastic sealing diaphragm is located in the accommodating cavity, and the periphery of the elastic sealing diaphragm is pressed into the accommodating cavity by a fixing block, thereby closing the pressure compensation cavity.

10. The solenoid valve with pressure compensation according to claim 1, characterized in that: A clamping ring sleeve is detachably connected to one end of the moving iron core body close to the valve body, the sealing plug is limited between the moving iron core body and the clamping ring sleeve, and a spring piece is clamped and fixed between the clamping ring sleeve and the moving iron core body.

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