CN114593261B

CN114593261B - Electromagnetic valve device

Info

Publication number: CN114593261B
Application number: CN202210225119.3A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2022-02-28
Filing date: 2022-03-07
Publication date: 2024-02-09
Anticipated expiration: 2042-03-07
Also published as: CN114593261A

Abstract

The invention discloses an electromagnetic valve device, which comprises a valve body and a driving assembly, wherein the valve body is provided with a valve cavity and a valve port; the driving assembly comprises a core iron group, a valve core group, a first elastic piece and a second elastic piece, wherein the core iron group comprises core iron and a plug arranged on the core iron, and the valve core group and the core iron group can slide relatively; the plug comprises an annular piece and a buffer ejector rod, the annular piece is provided with a through hole, the buffer ejector rod comprises a rod part and a stop part, the outer diameter of the rod part is matched with the inner diameter of the through hole, and the stop part is used for forming an axial stop with the annular piece; the first elastic piece and the second elastic piece are propped against the valve core group, the first elastic piece is propped against the annular piece, the second elastic piece is propped against the stop part, and the first elastic piece is sleeved outside the second elastic piece; the core iron group is arranged in the housing and can move in the housing; the stopper portion is capable of axially abutting against the annular member in a state where the core iron and the housing are in clearance fit in the axial direction, and the rod portion has a portion protruding from the core iron in the axial direction.

Description

Electromagnetic valve device

Technical Field

The invention relates to the technical field of valve devices, in particular to a solenoid valve device.

Background

Electromagnetic valve devices are commonly used in application scenes such as air conditioning systems and the like, and are mainly used for realizing fluid on-off and fluid flow regulation.

Unlike other forms of valve arrangements, the driving force of the solenoid valve arrangement is from a coil. When the coil is electrified, the core iron in the electromagnetic valve device can be driven to displace, and then the valve core can be driven to displace, so that the valve port can be plugged or opened. However, the conventional solenoid valve device generally has a problem of loud noise.

Disclosure of Invention

The object of the present invention is to provide a solenoid valve device which is relatively low in noise.

In order to solve the technical problems, the invention provides a solenoid valve device, which comprises a valve body and a driving assembly, wherein the valve body is provided with a valve cavity and a valve port; the driving assembly comprises a core iron group, a valve core group, a first elastic piece and a second elastic piece, wherein the core iron group comprises core iron and a plug arranged on the core iron, and the valve core group can be assembled on the core iron group in a relatively sliding manner; the plug comprises an annular part and a buffer ejector rod, the annular part is provided with a through hole, the buffer ejector rod comprises a rod part and a stop part, the outer diameter of the rod part is matched with the inner diameter of the through hole, and the stop part is positioned on the outer wall surface of the rod part and is used for forming an axial stop with the annular part; one end of the first elastic piece is propped against the valve core group, the other end of the first elastic piece is propped against the annular piece, one end of the second elastic piece is propped against the valve core group, the other end of the second elastic piece is propped against the stop part, the first elastic piece is sleeved outside the second elastic piece, and part of the valve core group extends into the valve cavity to be used for blocking or opening the valve port; the core iron group is arranged in the housing and can move in the housing; the core iron is in an axially abutting state with the housing, the buffer ejector rod is also in an axially abutting state with the housing, and the stop part and the annular piece are in axially clearance arrangement; the stopper portion is capable of axially abutting against the ring member in a state where the core iron is in clearance fit with the housing in the axial direction, and the lever portion has a portion protruding from the ring member in the axial direction.

By adopting the structure, when the valve core group is not contacted with the valve port, the valve core group can synchronously displace with the core iron group under the action of the first elastic piece and the second elastic piece so as to execute valve closing action under the action of electromagnetic force; when the valve core group contacts with the valve port, the valve core group can overcome the elastic force of the first elastic piece and the second elastic piece and slide relatively with the core iron group, the elastic deformation of the first elastic piece and the second elastic piece is increased, larger acting force can be generated on the valve core group, and the reliability of valve closing can be better ensured.

More importantly, due to the buffer action of the first elastic piece and the second elastic piece, the rigid collision between the valve core group and the valve port is changed into elastic collision, so that the impact from the valve core group to the valve port during closing can be reduced, the collision abrasion between the valve core group and the valve port can be effectively reduced, the service life of a product can be prolonged, and the collision noise between the valve core group and the valve port can be reduced. And moreover, the first elastic piece is matched with the second elastic piece to provide larger elastic force, so that the valve closing reliability is ensured.

In addition, the electromagnetic valve device provided by the embodiment of the invention is further provided with the plug comprising the annular piece and the buffering ejector rod, and the outer diameter of the rod part of the buffering ejector rod is matched with the inner diameter of the through hole of the annular piece, so that damping can exist when the buffering ejector rod generates relative displacement in the annular piece. In the valve-closing state, the core iron and the housing are in an axially clearance fit state, and the stop portion can axially abut against the annular member, so that the rod portion has a portion protruding from the core iron. Therefore, when the valve is opened, the part of the rod part protruding out of the core iron can be preferentially contacted with the housing, and then, relative sliding can be generated between the rod part and the annular piece so as to buffer the displacement of the core iron towards the housing, and further, the collision noise of the core iron group and the housing is reduced. And, because the radial dimension of the second elastic piece is smaller, the elastic force that it produces is also less, more is favorable to reducing the collision noise between pole portion and the housing.

That is, the electromagnetic valve device provided by the invention can reduce noise both when the valve is opened and when the valve is closed.

Drawings

FIG. 1 is a schematic view of a solenoid valve apparatus according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the drive assembly of FIG. 1;

FIG. 3 is a schematic view of the valve core of FIG. 1 moving with the core iron to a state of just contacting the valve port;

FIG. 4 is a schematic view of the valve cartridge of FIG. 3 moved into contact with a stop;

fig. 5 is a schematic view showing a structure in which the core iron group of fig. 4 is moved to a state in which the buffer jack is in contact with the housing.

The reference numerals in fig. 1-5 are illustrated as follows:

1 valve body, 11 valve seat, 111 valve cavity, 12 valve seat, 121 valve port;

the device comprises a 2 driving assembly, a 21 core iron group, a 211 core iron, a 211a step hole, a 211a-1 large neck hole section, a 211a-2 small neck hole section, a 211a-3 step surface, a 212 plug, a 212a annular piece, a 212a-1 through hole, a 212b buffering ejector rod, a 212b-1 rod part, a 212b-2 stop part, a 22 valve core, a 221 stop piece, a 23 first elastic piece, a 24 stop piece, a 25 third elastic piece, a 26 housing and a 27 coil;

3, a first connecting pipe;

and 4, taking over the second pipe.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

The terms "first," "second," and the like, herein are merely used for convenience in describing two or more structures or components that are identical or functionally similar, and do not denote any particular limitation of order and/or importance.

Referring to fig. 1-5, fig. 1 is a schematic structural diagram of an embodiment of a solenoid valve device according to the present invention, fig. 2 is a partially enlarged view of a driving assembly in fig. 1, fig. 3 is a schematic structural diagram of a valve core in fig. 1 when the valve core moves with a core iron to be in contact with a valve port, fig. 4 is a schematic structural diagram of a valve core in fig. 3 when the valve core moves with a blocking member, and fig. 5 is a schematic structural diagram of a core iron set in fig. 4 when the core iron set moves to be in contact with a housing.

As shown in fig. 1, the present invention provides a solenoid valve device including a valve body 1, a driving assembly 2, a first adapter 3, and a second adapter 4.

The valve body 1 may include a separate valve seat 11 and valve seat 12 for ease of manufacture. The valve seat 11 is formed with a valve chamber 111, and the valve port seat 12 is formed with a valve port 121. The valve port seat 12 may be mounted to the valve seat 11 such that the valve port 121 may be in communication with the valve chamber 111; specific mounting means include, but are not limited to, welding, interference fit, threaded connection, etc., as long as reliable connection and sealing performance of the two can be ensured. In some embodiments, the valve seat 11 and the valve port seat 12 may also be a unitary structure, that is, the valve port 121 may also be formed directly on the valve seat 11.

The driving assembly 2 may include a core-iron set 21, a valve core 22, and a coil 27, where the coil 27 may be sleeved on the core-iron set 21, and the core-iron set 21 is connected to the valve core 22, and a part of the valve core 22 extends into the valve cavity 111. When the coil is electrified, the core iron group 21 can drive the valve core 22 to displace, and the valve core 22 can plug or open the valve port 121 to realize valve closing or valve opening; in addition, in the valve-open state, the opening degree of the valve port 121 can be adjusted by adjusting the installation position of the valve element 22 in the valve cavity 111, so as to realize adjustment of the fluid flow.

Further, in the embodiment of the present invention, the driving assembly 2 further includes a first elastic member 23 and a second elastic member 28, the spool 22 is slidably assembled to the core-iron set 21, one end of each of the first elastic member 23 and the second elastic member 28 may abut against the spool 22, and the other end of each of the first elastic member 23 and the second elastic member 28 may abut against the core-iron set 21. And the first elastic member 23 is externally fitted to the second elastic member 28.

With this structure, when the valve core 22 is not in contact with the valve port 121, the valve core 22 can be synchronously displaced with the core iron group 21 under the action of the first elastic member 23 and the second elastic member 28, so as to perform the valve closing action under the action of electromagnetic force; when the valve core 22 contacts with the valve port 121, the valve core 22 overcomes the elastic force of the first elastic member 23 and the second elastic member 28 and slides relatively to the core iron set 21, the elastic deformation of the first elastic member 23 and the second elastic member 28 increases, and a larger acting force can be generated on the valve core 22, so that the reliability of closing the valve can be better ensured. The first elastic member 23 and the second elastic member 28 cooperate to generate a larger elastic force, which is more beneficial to ensuring the reliability of valve closing.

More importantly, due to the buffer action of the first elastic piece 23 and the second elastic piece 28, the rigid collision between the valve core 22 and the valve port 121 is changed into elastic collision, so that the impact from the valve core 22 to the valve port 121 during closing can be reduced, the collision abrasion between the valve core 22 and the valve port 121 can be effectively reduced, the service life of a product can be prolonged, and the collision noise between the valve core 22 and the valve port 121 can be reduced.

Here, the embodiment of the present invention is not limited to the specific types of the first elastic member 23 and the second elastic member 28, and in practical application, those skilled in the art may design according to specific needs, as long as the requirements of use can be met. For example, the first elastic member 23 and the second elastic member 28 may be made of a flexible material such as rubber, or the first elastic member 23 may be a spring, a bellows, or the like. Compared with the prior art, the spring has a plurality of types, is easier to acquire and install, has better deformation performance and recovery performance, has longer service life, and is a preferable scheme of the embodiment of the invention.

With continued reference to fig. 1, and in conjunction with fig. 2, the core iron set 21 may include a core iron 211, the core iron 211 may be provided with a step hole 211a penetrating along an axial direction, the step hole 211a may include a large neck hole section 211a-1 and a small neck hole section 211a-2, and a step surface 211a-3 is formed therebetween; the valve core 22 can pass through the small neck hole section 211a-2 from bottom to top (refer to the azimuth and position relation in fig. 2) and can extend into the large neck hole section 211a-1, and the extending part can be provided with a limiting piece 221 for forming axial limiting with the step surface 211a-3 so as to prevent the valve core 22 from falling out of the core iron 211; one end of the first elastic member 23 may abut against a surface of the stopper 221 facing away from the stepped surface 211a-3, and one end of the second elastic member 28 may abut against the valve element 22, and of course, both the first elastic member 23 and the second elastic member 28 may abut against the valve element 22/the stopper 221.

The portion of the spool 22 passing through the small neck bore section 211a-2 and the portion of the spool iron 211 where the small neck bore section 211a-2 is provided may be a clearance fit so as not to affect the sliding of the spool 22 within the small neck bore section 211 a-2. Similarly, the portion of the stopper 221 and the core iron 211 where the large neck hole section 211a-1 is provided may be a clearance fit so as not to affect the sliding of the stopper 221 in the large neck hole section 211 a-1. Thus, the spool 22 can be displaced with respect to the spool iron 211.

The connection manner between the limiting member 221 and the valve core 22 is not limited herein, and in specific practice, a person skilled in the art can adjust the connection manner according to actual needs, so long as reliable connection between the limiting member and the valve core can be ensured. For example, the connection between the limiting member 221 and the valve core 22 may be a threaded connection, an interference fit, welding, bonding, clamping, etc.

Further, the core iron set 21 may further include a plug 212, the plug 212 may be mounted on the large neck hole section 211a-1, and the other ends of the first elastic member 23 and the second elastic member 28 may abut against the plug 212. The plug 212 may be assembled after the plug 22 and the stopper 221 are inserted, so as not to affect the installation of the plug 22 and the stopper 221. The connection between the plug 212 and the core iron 211 may be set with reference to the connection between the stopper 221 and the valve body 22, and will not be repeated here.

As shown in fig. 1, the electromagnetic valve device provided by the present invention may further include a blocking member 24 and a third elastic member 25, wherein the blocking member 24 may be mounted on the valve seat 11, and the valve core 22 may pass through the blocking member 24 and extend into the valve cavity 111. One end of the third elastic member 25 may be abutted against the core iron group 21, and the other end of the third elastic member 25 may be abutted against the stopper 24.

When the coil 27 is energized, the core iron 211 may drive the valve core 22 to displace toward the valve port 121, and in this process, the elastic deformation of the third elastic member 25 may be increased. In this way, when the coil 27 is powered off, the elastic force of the third elastic member 25 can be released, so that the core iron 211 and the valve core 22 can be driven to return automatically, and the displacement control of the core iron 211 and the valve core 22 can be simpler. Alternatively, the third elastic member 25 may not be provided, and the return of the spool 22 and the spool 211 may be controlled by changing the current direction of the coil 27.

The kind of the third elastic member 25 is not limited herein, and reference may be made specifically to the foregoing description of the first elastic member 23, and repetitive description will not be made herein.

The material of the blocking member 24 is not limited in this embodiment, and those skilled in the art can configure the blocking member according to actual needs in specific practice. As an exemplary illustration, the blocking member 24 may be a fixed iron core, and both the blocking member 24 and the core iron 211 may be made of soft magnetic materials, and when the coil 27 is energized, both the core iron 211 and the blocking member 24 may generate magnetism and attract each other, so that the core iron 211 may drive the valve core 22 to displace toward the valve port 121.

As also shown in fig. 1, the axial distance D1 between the core-iron group 21 and the stopper 24 may be larger than the axial distance D2 between the spool 22 and the valve port 121 in a state where the stopper 221 is in axial abutment with the stepped surface 211 a-3.

Thus, referring to fig. 3, when the valve core 22 contacts with the valve port 121, the axial gap D3 is still provided between the core iron 211 and the blocking member 24, so that the arrangement of the blocking member 24 will not affect the valve core 22 to normally block the valve port 121. In addition, the core iron 211 still has a space for moving toward the blocking member 24, which creates a condition for the relative sliding between the valve core 22 and the core iron 211, and referring to fig. 4, when the core iron 211 moves axially to a state of abutting against the blocking member 24, an axial gap D4 (d3=d4) may be provided between the limiting member 221 and the step surface 211a-3, and the elastic deformation amounts of the first elastic member 23 and the second elastic member 28 may be increased, so that a larger elastic force may be generated, which is more beneficial to ensuring the reliable blocking of the valve core 22 to the valve port 121.

Further, the electromagnetic valve device provided by the embodiment of the invention may further include a housing 26, the housing 26 may be a thin-walled member, which may be in an inverted barrel shape, and a lower end opening of the housing 26 may be mounted on the blocking member 24 and may enclose with the blocking member 24 to form a closed space. The manner of mounting between the cover 26 and the stopper 24 is not limited, and may be, for example, welding, screwing, clamping, or the like, as long as the reliability and sealability of the connection can be ensured.

The core iron group 21 can be mounted in the above-described closed space and can be displaced in the housing 26. Referring to fig. 2, the plug 212 may include a ring 212a and a buffer post 212b. The ring-shaped member 212a has a through hole 212a-1, the buffer plunger 212b includes a rod portion 212b-1 and a stopper portion 212b-2, and the outer diameter of the rod portion 212b-1 can be adapted to the inner diameter of the through hole 212 a-1; the adaptation here means that the outer diameter of the rod portion 212b-1 may be substantially identical to the inner diameter of the through hole 212a-1, so that the rod portion 212b-1 may displace within the through hole 212a-1, and at the same time, the inner wall of the ring member 212a may generate a certain friction resistance to the displacement of the rod portion 212b-1, so as to damp the displacement of the buffer rod 212b within the through hole 212 a-1. The stop 212b-2 may be located on an outer wall surface of the stem 212b-1 for forming an axial stop with the ring 212 a. The first elastic member 23 may specifically be abutted against the annular member 212 a; the second elastic member 28 may be in contact with the stopper 212b-2 in the axial direction, or the second elastic member 28 may be in contact with the rod 212b-1 in the axial direction.

Here, the embodiment of the present invention is not limited to the specific structural form of the stop portion 212b-2, and in practical application, those skilled in the art can set the stop portion according to actual needs, so long as the corresponding technical effects can be achieved. For example, the stop 212b-2 may be an annular plate, in which case the annular plate 212b-2 may surround the shaft 212b-1 for one revolution; alternatively, the stopper 212b-2 may be a projection, and in this case, it may be provided only at a partial position in the circumferential direction of the rod 212b-1, and the number of projections may be one or more, and when a plurality of projections are provided, the projections may be arranged at intervals in the circumferential direction. The stop portion 212b-2 and the rod portion 212b-1 may be integrally formed; alternatively, the stopper 212b-2 and the stem 212b-1 may be manufactured separately and then assembled, and in this case, the stopper 212b-2 may be a retainer ring or the like.

Referring to fig. 2, when the core iron 211 and the cover 26 are in contact with each other in the axial direction, the buffer plunger 212b may be in contact with the cover 26 in the axial direction, and an axial gap D6 may be provided between the stopper 212b-2 and the ring 212 a. As such, in a state where the core iron 211 and the housing 26 are in clearance fit in the axial direction, referring to fig. 3 and 4, the buffer rod 212b can slide in the through hole 212a-1 by the second elastic member 28 so that the stopper portion 212b-2 can be abutted against the annular member 212a in the axial direction, and the rod portion 212b-1 can have a portion protruding from the core iron 211 in a direction away from the valve port 121.

Therefore, when the coil 27 is powered off, and the core iron set 21 and the valve core 22 return under the action of the third elastic member 25, as shown in fig. 5, the buffer ejector rod 212b may contact with the housing 26 first, and at this time, an axial gap D5 is further provided between the core iron 211 and the housing 26; then, the rod portion 212b-1 and the ring member 212a can slide relatively under the continuous action of the third elastic member 25, and the core iron 211 is brought into contact with the housing 26. In this process, the buffer plunger 212b is preferentially contacted with the housing 26, and then friction generated by relative sliding between the outer wall surface of the rod portion 212b-1 and the inner wall surface of the annular member 212a can increase damping on displacement of the core iron 211 towards the housing 26 so as to buffer, so that impact force of the core iron 211 can be reduced, and collision noise between the core iron 211 and the housing 26 can be reduced. And, the radial dimension of the second elastic member 28 is smaller, and the generated elastic force is smaller, which is more beneficial to reducing the collision noise between the rod part and the housing.

Further, the end of the rod portion 212b-1 remote from the spool 22 is formed with a tip, for example, the end of the rod portion 212b-1 remote from the spool 22 may have a spherical surface, and the rod portion 212b-1 may be capable of axially abutting with the housing 26 through the tip. In this way, the contact area between the stem 212b-1 and the housing 26 is smaller, which is more advantageous for reducing collision noise.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. The electromagnetic valve device comprises a valve body (1) and a driving assembly (2), wherein the valve body (1) is provided with a valve cavity (111) and a valve port (121), and the electromagnetic valve device is characterized in that the driving assembly (2) comprises a core iron group (21), a valve core group, a first elastic piece (23) and a second elastic piece (28), the core iron group (21) comprises a core iron (211) and a plug (212) arranged on the core iron (211), the valve core group is assembled on the core iron group (21) in a relatively sliding manner, and the valve core group and the core iron group (21) can synchronously displace;

the plug (212) comprises an annular piece (212 a) and a buffer ejector rod (212 b), the annular piece (212 a) is provided with a through hole (212 a-1), the buffer ejector rod (212 b) comprises a rod part (212 b-1) and a stop part (212 b-2), the outer diameter of the rod part (212 b-1) is matched with the inner diameter of the through hole (212 a-1), and the stop part (212 b-2) is used for forming an axial stop with the annular piece (212 a);

one end of the first elastic piece (23) is propped against the valve core group, the other end of the first elastic piece (23) is propped against the annular piece (212 a), one end of the second elastic piece (28) is propped against the valve core group, the other end of the second elastic piece (28) is propped against the stop part (212 b-2), the first elastic piece (23) is sleeved outside the second elastic piece (28), and part of the valve core group extends into the valve cavity (111) for plugging or opening the valve port (121);

the device also comprises a housing (26), wherein the core iron group (21) is arranged on the housing (26) and can move in the housing (26); the core iron (211) is in an axially abutting state with the housing (26), the buffer ejector rod (212 b) is also in an axially abutting state with the housing (26), and the stop part (212 b-2) and the annular piece (212 a) are arranged in an axially clearance manner; the stopper portion (212 b-2) is capable of axially abutting against the ring member (212 a) in a state where the core iron (211) is in clearance fit with the housing (26) in the axial direction, and the rod portion (212 b-1) has a portion protruding from the core iron (211) in the axial direction.

2. The electromagnetic valve device according to claim 1, characterized in that the core iron group (21) includes a core iron (211), the core iron (211) is provided with a stepped hole (211 a) penetrating in an axial direction, the stepped hole (211 a) includes a large neck hole section (211 a-1) and a small neck hole section (211 a-2), and a stepped surface (211 a-3) is formed therebetween;

the valve core group comprises a valve core (22), the valve core (22) penetrates through the small neck hole section (211 a-2) and is provided with a part extending into the large neck hole section (211 a-1), a limiting piece (221) is arranged on the part and used for limiting the step surface (211 a-3) axially, one end of the first elastic piece (23) is abutted to one surface, deviating from the step surface (211 a-3), of the limiting piece (221), and one end of the second elastic piece (28) is abutted to the valve core (22).

3. The electromagnetic valve device according to claim 2, further comprising a blocking member (24) and a third elastic member (25), one end of the third elastic member (25) being in abutment with the core iron group (21), the other end of the third elastic member (25) being in abutment with the blocking member (24).

4. A solenoid valve device according to claim 3, wherein an axial distance between the core iron group (21) and the stopper (24) is larger than an axial distance between the spool (22) and the valve port (121) in a state where the stopper (221) is in axial abutment with the stepped surface (211 a-3).

5. A solenoid valve device according to claim 3, characterised in that said blocking member (24) is mounted to said valve body (1), said casing (26) being mounted to said blocking member (24).

6. A solenoid valve device according to claim 3, characterised in that said first elastic member (23), said second elastic member (28) and said third elastic member (25) are all springs.

7. The solenoid valve device according to any one of claims 1 to 6, characterized in that an end of the rod portion (212 b-1) remote from the spool (22) is formed with a tip through which the rod portion (212 b-1) can axially abut against the housing (26).

8. The electromagnetic valve device according to any one of claims 1 to 6, characterized in that the valve body (1) includes a valve seat (11) and a valve port seat (12), the valve port seat (12) is mounted to the valve seat (11), and the valve port (121) is provided to the valve port seat (12).