CN114593261A

CN114593261A - Electromagnetic valve device

Info

Publication number: CN114593261A
Application number: CN202210225119.3A
Authority: CN
Inventors: 不公告发明人
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: 2022-06-07
Anticipated expiration: 2042-03-07
Also published as: CN114593261B

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 set, a valve core set, a first elastic part and a second elastic part, wherein the core iron set comprises core iron and a plug installed on the core iron, and the valve core set and the core iron set can slide relatively; the plug comprises a ring piece and a buffering ejector rod, the ring piece is provided with a through hole, the buffering ejector rod comprises a rod part and a stopping part, the outer diameter of the rod part is matched with the inner diameter of the through hole, and the stopping part is used for forming axial stopping with the ring piece; the first elastic part and the second elastic part are both abutted against the valve core group, the first elastic part is abutted against the annular part, the second elastic part is abutted against the stopping part, and the first elastic part is sleeved outside the second elastic part; the core iron set is arranged on the housing and can move in the housing; when the core iron and the housing are in clearance fit along the axial direction, the stop part can be abutted against the annular part along the axial direction, and the rod part is provided with a part which protrudes out of the core iron along the axial direction.

Description

Electromagnetic valve device

Technical Field

The invention relates to the technical field of valve devices, in particular to an electromagnetic valve device.

Background

The electromagnetic valve device is commonly used in application scenes such as an air conditioning system and the like, and is mainly used for realizing the on-off of fluid and the adjustment of fluid flow.

Unlike other forms of valve devices, the driving force of the solenoid valve device comes from the 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 electromagnetic valve device generally has a problem of loud noise.

Disclosure of Invention

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

In order to solve the technical problem, the invention provides 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 set, a valve core set, a first elastic part and a second elastic part, the core iron set comprises core iron and a plug installed on the core iron, and the valve core set can be assembled on the core iron set in a relatively sliding mode; the plug comprises a ring piece and a buffering ejector rod, the ring piece is provided with a through hole, the buffering ejector rod comprises a rod part and a stopping part, the outer diameter of the rod part is matched with the inner diameter of the through hole, and the stopping part is positioned on the outer wall surface of the rod part and used for forming an axial stopping with the ring piece; one end of the first elastic part abuts against the valve core group, the other end of the first elastic part abuts against the annular part, one end of the second elastic part abuts against the valve core group, the other end of the second elastic part abuts against the stopping part, the first elastic part is sleeved outside the second elastic part, and part of the valve core group extends into the valve cavity and is used for plugging or opening the valve port; the core iron set is arranged on the cover shell and can move in the cover shell; the core iron and the housing are in an axial abutting state, the buffering ejector rod is also in axial abutting with the housing, and the stopping part and the annular part are arranged in an axial clearance; the stopping part can be axially abutted against the annular part under the condition that the core iron and the cover shell are in clearance fit along the axial direction, and the rod part is provided with a part axially protruding out of the annular part.

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 part and the second elastic part so as to execute valve closing action under the action of electromagnetic force; when the valve core group is contacted with the valve port, the valve core group can overcome the elastic force of the first elastic part and the second elastic part and can slide relative to the valve core group, the elastic deformation of the first elastic part and the second elastic part 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 buffering effect of the first elastic part and the second elastic part, rigid collision between the valve core group and the valve port is converted into elastic collision, so that impact from the valve core group on the valve port when the valve is closed can be reduced, 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 collision noise between the valve core group and the valve port can be reduced. And the first elastic piece is matched with the second elastic piece to provide larger elastic force, so that the reliability of closing the valve can be ensured.

In addition, the electromagnetic valve device provided by the embodiment of the invention is also provided with a plug comprising a ring-shaped element and a buffering ejector rod, and the outer diameter of the rod part of the buffering ejector rod can be matched with the inner diameter of the through hole of the ring-shaped element, so that damping can exist when the buffering ejector rod generates relative displacement in the ring-shaped element. In the valve closing state, the core iron and the housing are in an axial clearance fit state, and the stopping part can be in axial abutment with the annular part, so that the rod part has a part protruding out of 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 cover, and then, the rod part and the ring piece can generate relative sliding to buffer the displacement of the core iron towards the cover, thereby reducing the collision noise of the core iron group and the cover. And, because the radial dimension of second elastic component is less, its elastic force that produces is also less, is more favorable to reducing the collision noise between pole portion and the housing.

That is, the electromagnetic valve device provided by the invention has small noise when the valve is opened and closed.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of a solenoid valve device provided in the present invention;

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

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

FIG. 4 is a schematic view of the valve core of FIG. 3 in a state in which the valve core is moved into contact with the stopper;

fig. 5 is a schematic structural view illustrating the state in which the core iron set of fig. 4 is moved to contact the buffering ejector rod with the housing.

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

1 valve body, 11 valve seats, 111 valve cavity, 12 valve port seats and 121 valve ports;

2, a driving assembly, 21 core iron set, 211 core iron, 211a stepped hole, 211a-1 large neck hole section, 211a-2 small neck hole section, 211a-3 stepped surface, 212 plug, 212a ring piece, 212a-1 through hole, 212b buffer ejector rod, 212b-1 rod part, 212b-2 stopping part, 22 valve core, 221 limiting part, 23 first elastic part, 24 stopping part, 25 third elastic part, 26 cover shell and 27 coil;

3, a first connecting pipe;

4 second connecting pipe.

Detailed Description

In order to make the technical solutions 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 used for convenience in describing two or more structures or components that are identical or similar in structure and/or function and do not denote any particular limitation in order and/or importance.

Referring to fig. 1 to 5, fig. 1 is a schematic structural diagram of an embodiment of a solenoid valve device provided by 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 state in which a valve core moves along with a core iron to just contact a valve port in fig. 1, fig. 4 is a schematic structural diagram of a state in which the valve core moves to contact a stopper in fig. 3, and fig. 5 is a schematic structural diagram of a state in which a core iron set moves to make a buffering plunger contact a housing in fig. 4.

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

The valve body 1 may include a split type valve seat 11 and a valve port seat 12 for easy manufacturing. 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 so that the valve port 121 may communicate with the valve chamber 111; specific mounting manners include but are not limited to welding, interference fit, threaded connection and the like as long as reliable connection and sealing performance of the two can be guaranteed. In some embodiments, the valve seat 11 and the valve 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, the coil 27 may be externally sleeved on the core iron set 21, the core iron set 21 is connected with 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 close or open the valve; in the open state, the opening degree of the valve port 121 can be adjusted by adjusting the mounting position of the valve body 22 in the valve chamber 111, thereby adjusting the fluid flow rate.

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 valve core 22 is relatively slidably mounted on the core iron set 21, one end of each of the first elastic member 23 and the second elastic member 28 can abut against the valve core 22, and the other end of each of the first elastic member 23 and the second elastic member 28 can abut against the core iron set 21. And the first elastic member 23 is fitted over the second elastic member 28.

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

More importantly, due to the buffering effect of the first elastic element 23 and the second elastic element 28, rigid collision between the valve core 22 and the valve port 121 is converted into elastic collision, so that impact from the valve core 22 to the valve port 121 when the valve is closed can be reduced, 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 collision noise between the valve core 22 and the valve port 121 can be reduced.

Here, the embodiment of the present invention does not limit the specific kinds of the first elastic member 23 and the second elastic member 28, and in practical applications, a person skilled in the art can design the elastic members 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 elastic bodies made of flexible materials such as rubber, or the first elastic member 23 may also be a spring, a bellows, or the like. In comparison, the springs are numerous in types, easy to obtain and install, good in deformation performance and recovery performance and long in service life, and are the preferred scheme of the embodiment of the invention.

With continuing reference to fig. 1 and with reference to fig. 2, the core iron set 21 may include a core iron 211, the core iron 211 may have a stepped hole 211a that penetrates axially, the stepped hole 211a may include a large neck hole section 211a-1 and a small neck hole section 211a-2, and a stepped surface 211a-3 is formed therebetween; the valve core 22 can penetrate through the small neck hole section 211a-2 from bottom to top (refer to the orientation 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 limiting member 221 away from the step surface 211a-3, 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 limiting member 221.

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

The connection mode between the limiting member 221 and the valve core 22 is not limited herein, and in particular practice, a person skilled in the art may adjust the connection mode according to actual needs as long as reliable connection between the two is ensured. For example, the connection between the limiting member 221 and the valve core 22 may be a threaded connection, an interference fit, a welding, an adhesive, a snap connection, or the like.

Further, the core iron set 21 may further include a plug 212, the plug 212 may be mounted to the large neck hole section 211a-1, and the other ends of the first elastic element 23 and the second elastic element 28 may abut against the plug 212. Specifically, the plug 212 may be assembled after the valve element 22 and the limiting member 221 are inserted, so as not to affect the installation of the valve element 22 and the limiting member 221. The connection between the plug 212 and the core iron 211 can be set by referring to the connection between the limiting member 221 and the valve core 22, and a repetitive description thereof will not be given here.

As also shown in fig. 1, the solenoid valve device provided by the present invention may further include a blocking member 24 and a third elastic member 25, 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 chamber 111. One end of the third elastic member 25 may abut against the core iron set 21, and the other end of the third elastic member 25 may abut 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 element 25 may increase. In this way, when the coil 27 is powered off, the elastic force of the third elastic element 25 can be released, the core iron 211 and the valve core 22 can be driven to automatically return, 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 in this case, the core 211 and the valve element 22 may be controlled to return by changing the current direction of the coil 27.

The type of the third elastic element 25 is not limited herein, and reference may be made to the description of the first elastic element 23, and repeated descriptions will not be made here.

Here, the material of the blocking member 24 is not limited in the embodiments of the present invention, and in practice, those skilled in the art can configure the blocking member according to actual needs. As an exemplary illustration, the blocking member 24 may be a fixed iron core, and both the fixed iron core and the aforementioned core iron 211 may be made of soft magnetic material, 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 element 22 to displace toward the valve port 121.

As also shown in FIG. 1, in the state where the retainer 221 is axially abutted against the step surface 211a-3, the axial distance D1 between the core set 21 and the stopper 24 may be greater than the axial distance D2 between the valve core 22 and the valve port 121.

Thus, referring to fig. 3, when the valve element 22 contacts the valve port 121, an axial gap D3 is still provided between the core 211 and the stopper 24, so that the stopper 24 is not disposed to influence the normal blocking of the valve port 121 by the valve element 22. In addition, the core iron 211 still has a space for displacement toward the stopper 24, which creates a condition for relative sliding between the valve element 22 and the core iron 211, and with reference to fig. 4, in a state where the core iron 211 is axially displaced to abut against the stopper 24, an axial gap D4(D3 — D4) may be provided between the stopper 221 and the step surface 211a-3, so that the elastic deformation amount of the first elastic element 23 and the second elastic element 28 may be increased, which may generate a larger elastic force, and may be more beneficial to ensuring reliable sealing of the valve element 22 with respect to the valve port 121.

Further, the electromagnetic valve device provided by the embodiment of the present invention may further include a casing 26, where the casing 26 is a thin-walled member, and may be in an inverted barrel shape, and a lower end opening of the casing 26 may be mounted on the blocking member 24 and may surround the blocking member 24 to form a closed space. The mounting between the housing 26 and the blocking member 24 is not limited, and may be, for example, welding, screwing, clipping, etc., as long as the reliability and sealing performance of the connection can be ensured.

The core set 21 can be mounted in the above-described closed space and can be displaced in the housing 26. Referring to fig. 2, the stopper 212 may include a ring 212a and a buffer pin 212 b. The annular piece 212a is provided with a through hole 212a-1, the buffering mandril 212b comprises a rod part 212b-1 and a stopping part 212b-2, and the outer diameter of the rod part 212b-1 can be matched with the inner diameter of the through hole 212 a-1; by adaptive, it is meant that the outer diameter of the rod portion 212b-1 may substantially conform to the inner diameter of the through hole 212a-1, such that the rod portion 212b-1 may displace within the through hole 212a-1, while the inner wall of the ring 212a may provide a frictional resistance to the displacement of the rod portion 212b-1 to dampen the displacement of the bumper post 212b within the through hole 212 a-1. The stop portion 212b-2 may be located on the outer wall surface of the rod portion 212b-1 for forming an axial stop with the ring member 212 a. The first elastic element 23 may specifically abut against the annular element 212 a; specifically, the second elastic member 28 may axially abut against the stopper portion 212b-2, or the second elastic member 28 may axially abut against the rod portion 212 b-1.

Here, the embodiment of the present invention does not limit the specific structural form of the stopping portion 212b-2, and in practical applications, a person skilled in the art may set the stopping portion according to actual needs as long as the corresponding technical effects can be achieved. For example, the stopper portion 212b-2 can be an annular plate, in which case the annular plate 212b-2 can encircle the rod portion 212 b-1; alternatively, the stopping portion 212b-2 may be a protrusion, and in this case, it may be only provided at a partial position in the circumferential direction of the rod portion 212b-1, and the number of the protrusions may be one or more, and when there are more, the protrusions may be arranged at intervals in the circumferential direction. The stopping portion 212b-2 and the rod portion 212b-1 can be an integral structure; alternatively, the stopping portion 212b-2 and the trunk portion 212b-1 may be manufactured separately and then assembled, in which case the stopping portion 212b-2 may be a retainer ring or the like.

Referring to fig. 2, when the core 211 is in axial abutment with the housing 26, the buffering rod 212b may also be in axial abutment with the housing 26, and at this time, an axial gap D6 may be provided between the stopping portion 212b-2 and the ring member 212 a. In this way, in a state where the core 211 and the housing 26 are in an axial clearance fit, referring to fig. 3 and 4, under the action of the second elastic element 28, the buffering mandril 212b can slide in the through hole 212a-1, so that the stopping part 212b-2 can be axially abutted against the annular element 212a, and the rod part 212b-1 can have a part protruding out of the core 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 element 25, as shown in fig. 5, the buffer ejector rod 212b can be firstly contacted with the housing 26, and at this time, an axial gap D5 is formed between the core iron 211 and the housing 26; then, under the continuous action of the third elastic element 25, the rod portion 212b-1 and the ring member 212a can slide relatively, and the core iron 211 is in contact with the cover 26. In this process, the buffer ejector rod 212b is preferentially contacted with the housing 26, and then, the friction generated by the relative sliding between the outer wall surface of the rod part 212b-1 and the inner wall surface of the ring-shaped part 212a can increase the damping on the displacement of the core 211 towards the housing 26 so as to buffer, so that the impact force of the core 211 can be reduced, and the collision noise between the core 211 and the housing 26 can be reduced. Moreover, the second elastic element 28 has a smaller radial dimension and generates a smaller elastic force, which is more beneficial for reducing the collision noise between the rod part and the housing.

Further, the end of the rod portion 212b-1 away from the valve core 22 is formed with a tip, for example, the end of the rod portion 212b-1 away from the valve core 22 may have a spherical surface, and the rod portion 212b-1 can axially abut against the housing 26 through the tip. Thus, the contact area between the rod portion 212b-1 and the housing 26 is smaller, which is more advantageous in reducing the collision noise.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. An 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), the driving assembly (2) comprises a core iron set (21), a valve core set, a first elastic member (23) and a second elastic member (28), the core iron set (21) comprises a core iron (211) and a plug (212) mounted on the core iron (211), and the valve core set is relatively slidably assembled on the core iron set (21);

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

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

the core iron set (21) is arranged on the cover shell (26) and can be displaced in the cover shell (26); the core iron (211) is in an axial abutting state with the housing (26), the buffering ejector rod (212b) is also in axial abutting state with the housing (26), and the stopping part (212b-2) and the annular part (212a) are arranged in an axial clearance; the stop part (212b-2) can be axially abutted against the ring part (212a) in a state that the core iron (211) is axially clearance-fitted with the housing (26), and the rod part (212b-1) has a part axially protruding from the core iron (211).

2. The electromagnetic valve device according to claim 1, wherein the core iron set (21) comprises a core iron (211), the core iron (211) is provided with a stepped hole (211a) which is through along the axial direction, and the stepped hole (211a) comprises a large neck hole section (211a-1) and a small neck hole section (211a-2) which form a stepped surface (211a-3) therebetween;

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

3. The solenoid valve device according to claim 2, characterized in that it further comprises a blocking member (24) and a third elastic member (25), one end of said third elastic member (25) abuts against said core iron set (21), and the other end of said third elastic member (25) abuts against said blocking member (24).

4. The electromagnetic valve device according to claim 3, wherein, in a state where the stopper (221) is axially abutted against the step surface (211a-3), an axial distance between the core iron set (21) and the stopper (24) is larger than an axial distance between the valve core (22) and the valve port (121).

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

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

7. Solenoid valve device according to any one of claims 1 to 6, characterized in that the end of the stem (212b-1) remote from the spool (22) is formed with a tip by which the stem (212b-1) can axially abut against the casing (26).

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