CN210240730U

CN210240730U - Electromagnetic valve with auxiliary valve core

Info

Publication number: CN210240730U
Application number: CN201920911516.XU
Authority: CN
Inventors: Yixin Gu; 顾一新
Original assignee: Dongguan Zhengyang Electronic Mechanical Co ltd
Current assignee: Guangdong Zhengyang Sensor Technology Co ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-04-03
Anticipated expiration: 2029-06-17

Abstract

The utility model discloses a take supplementary case solenoid valve, including the case, the movable valve core, the supplementary case, big elastic component, little elastic component and valve body, around being equipped with the coil and being located valve body one side on the case, air inlet and gas outlet have been seted up on the valve body, still be equipped with the internal flow way in the valve body, the movable valve core slides and holds between valve body and case, big elastic component promotes the movable valve core and supports the entry of propping up in the internal flow way, the movable valve core is hollow structure and movable valve core tip is equipped with the supplementary valve port with the internal flow way intercommunication, the supplementary case is hollow structure and slides and holds in the moving valve core, the supplementary case passes the movable valve core and moves the case relatively and more is close to the case, little elastic component promotes the supplementary case and supports to push up and seal in the supplementary valve port, the lateral wall of movable valve core and supplementary. This take supplementary case solenoid valve can make the working flow of solenoid valve bigger, and the reliability is higher under the prerequisite of the big through-hole design of valve body through setting up two sealed case.

Description

Electromagnetic valve with auxiliary valve core

Technical Field

The utility model relates to a solenoid valve technical field especially relates to a take supplementary case solenoid valve.

Background

The existing straight-through electromagnetic valve is of a two-position on-off structure, and only one sealing pair consisting of a metal movable valve core and a rubber pad is arranged inside the straight-through electromagnetic valve. In a plurality of service environments, the electromagnetic valve needs to meet the requirement of large flow, so that the through hole in the valve body is enlarged during design, the length of an air gap (the distance between a fixed valve core and a movable valve core) is increased, the electromagnetic force generated in the electromagnetic valve is inversely proportional to the square of the length of the air gap, and the electromagnetic force is correspondingly reduced after the length of the air gap is increased. In practice, because of the consideration of factors such as the application environment, installation requirements, specifications and the like of the electromagnetic valve, the electromagnetic force generated by the electromagnetic valve is certain and cannot be correspondingly increased along with the increase of the flow and the working pressure, so that the problem that the electromagnetic valve is always in a closed state because the movable valve core cannot be opened is caused.

Therefore, it is necessary to provide a solenoid valve that can be normally opened under high flow operating conditions.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a solenoid valve that can normally open under large-traffic operating condition.

In order to achieve the purpose, the utility model provides a take supplementary case solenoid valve, including the valve body that decides case, movable valve core, supplementary case, big elastic component, little elastic component and inside have the cavity. The valve body is provided with an air inlet and an air outlet, and an inner flow passage communicated with the air outlet is also arranged in the valve body, the fixed valve core is wound with a coil and positioned at one side of the valve body, the movable valve core is accommodated between the valve body and the fixed valve core in a sliding way, the large elastic piece is arranged in the valve body and pushes the movable valve core to be propped against the inlet of the inner flow passage, the movable valve core is of a hollow structure, the end part of the movable valve core is provided with an auxiliary valve port communicated with the inner flow passage, the auxiliary valve core is of a hollow structure and is accommodated in the movable valve core in a sliding manner, one end of the auxiliary valve core penetrates through the movable valve core and is closer to the fixed valve core relative to the movable valve core, the small elastic piece is arranged in the movable valve core and pushes the auxiliary valve core to abut against and close the auxiliary valve port, and a first through hole and a second through hole are respectively formed in the side walls of the movable valve core and the auxiliary valve core.

Compared with the prior art, the utility model discloses take supplementary case solenoid valve seals up with these two of supplementary case including movable valve element, both seal up in interior runner entry and supplementary valve port under the elastic action of big small elastic component respectively. When the electromagnetic valve with the auxiliary valve core is electrified to work, if the internal fluid pressure is less than the electromagnetic force borne by the movable valve core, the movable valve core acts to open the inlet of the inner flow passage; if the internal fluid pressure is greater than the electromagnetic force of the movable valve core, the movable valve core cannot actuate, the auxiliary valve core which is larger in electromagnetic force and smaller in fluid pressure actuates to open the auxiliary valve port, fluid enters the inner flow channel from the auxiliary valve port through the first through hole and the second through hole and then is discharged from the air outlet to realize pressure relief, and when the fluid pressure drops to be lower than the electromagnetic force applied to the movable valve core, the movable valve core can actuate to open to realize faster through flow. Therefore, the electromagnetic valve with the auxiliary valve core has the advantages that the working flow of the electromagnetic valve is larger and the reliability is higher on the premise of designing the large through hole of the valve body by arranging the large sealing valve core and the small sealing valve core.

Preferably, the electromagnetic valve with the auxiliary valve core further comprises a connecting piece, the valve body is fixedly connected with the fixed valve core through the connecting piece, the movable valve core slides in the connecting piece, and two ends of the large elastic piece respectively elastically abut against the connecting piece and the movable valve core.

Specifically, the electromagnetic valve with the auxiliary valve core further comprises a sleeve, one end of the sleeve is fixed to one end of the fixed valve core, the connecting piece is fixed to the other end of the sleeve, and the movable valve core is slidably accommodated in the connecting piece and the sleeve.

Specifically, the coil is accommodated in a coil housing, the coil housing is mounted on a bracket, the connecting piece is located on one side of the bracket, and one end of the fixed valve core penetrates out of the other side of the bracket and is fixed through a fastener.

Preferably, an L-shaped pressure relief portion is arranged in the valve body, the pressure relief portion has a pressure relief surface facing the air inlet, the inner flow passage is arranged in the pressure relief portion, and an inlet of the inner flow passage is located on one side of the pressure relief portion, which is far away from the air inlet.

Preferably, the movable valve element includes a first main body and a main rubber pad disposed at one end of the first main body and abutting against the inlet of the inner flow passage, and the auxiliary valve port is disposed on the main rubber pad.

Specifically, one end of the first main body is provided with an accommodating groove, the thickness of the main rubber pad is slightly smaller than the width of the accommodating groove and is arranged in the accommodating groove, the movable valve element further comprises a first built-in spring, and two ends of the first built-in spring respectively elastically abut against the first main body and the main rubber pad.

Specifically, a metal auxiliary valve head is embedded in the main rubber pad in a penetrating manner, the auxiliary valve port is arranged in the auxiliary valve head in a penetrating manner, and the auxiliary valve core abuts against the auxiliary valve head.

Preferably, the auxiliary valve element includes a second main body and an auxiliary rubber pad disposed at one end of the second main body and abutting against the auxiliary valve port, and the auxiliary valve element further includes a second built-in spring disposed in the second main body, and the second built-in spring elastically urges the auxiliary rubber pad toward the auxiliary valve port.

Specifically, the auxiliary valve core further comprises a non-magnetic elastic nail slidably arranged in the second main body in a penetrating manner, two ends of the second built-in spring respectively abut against the auxiliary rubber pad and the elastic nail, and one end of the elastic nail departing from the second built-in spring penetrates out of the second main body.

Drawings

Fig. 1 is a perspective view of the electromagnetic valve with an auxiliary valve element according to the present invention.

Fig. 2 is a plan view of the solenoid valve with the auxiliary spool.

FIG. 3 is a cross-sectional view of a solenoid valve with an auxiliary spool.

Fig. 4 is an exploded view of a solenoid valve with an auxiliary spool.

Fig. 5 is a partially enlarged view of a cross-sectional view of fig. 3.

Fig. 6 is a perspective view of the movable valve element.

Fig. 7 is a perspective view of the auxiliary spool.

Fig. 8 is a sectional view of a solenoid valve with an auxiliary valve element according to a second embodiment of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

Referring to fig. 1 to 4, the present invention provides an electromagnetic valve with an auxiliary valve core (hereinafter referred to as an electromagnetic valve), which includes a stationary valve core 11, a movable valve core 2, an auxiliary valve core 3, a large elastic member 41, a small elastic member 42, a coil 50, a coil shell 51, a bracket 52, a sleeve 12, a connecting member 13, and a valve body 6.

The valve body 6 is a hollow structure with a cavity inside, one end of the valve body 6 is provided with an air inlet 61, the end opposite to the air inlet 61 is a connecting port provided with internal threads and used for being in butt joint with the connecting piece 13, and the valve body 6 is further provided with an air outlet 62 positioned between the air inlet 61 and the connecting port. A medium such as liquid, gas and the like enters the electromagnetic valve from the gas inlet 61 and exits from the gas outlet 62. An L-shaped pressure relief portion 63 is arranged in the cavity of the valve body 6, the pressure relief portion 63 is provided with a pressure relief surface 64 facing the air inlet 61, an L-shaped inner flow passage 65 is arranged in the pressure relief portion 63, the inlet of the inner flow passage 65 is located on one side of the pressure relief portion 63 departing from the air inlet 61, and the inner flow passage 65 is communicated to the air outlet 62.

The coil 50 is wound around the stationary core 11 and housed in a coil case 51, and the coil case 51 is placed on a holder 52. One end of the sleeve 12 is fixed to one end of the stationary valve core 11, the connecting piece 13 is fixed to the other end of the sleeve 12 and located outside one side of the bracket 52, and one end of the stationary valve core 11 penetrates out of the other side of the bracket 52 and is fixed through a fastener 55. Specifically, an external thread is arranged at one end of the fixed valve core 11, which penetrates through the bracket 52, the fastening member 55 is a nut in threaded connection with the threaded section of the fixed valve core 11, and the fastening member 55 provides clamping force with the connecting member 13 when being tightened, so that the fixed valve core 11, the coil shell 51 and the connecting member 13 are all fixed on the bracket 52. The fixed valve core 11, the sleeve 12 and the connecting piece 13 are fixed by welding, and the bracket 52 is a fixed base when the solenoid valve is installed in some devices or devices, and is not an essential element for realizing the function of the solenoid valve.

One end of the connecting member 13 is provided with an external thread and screwed into a connecting port on the valve body 6 to be screwed with the valve body 6, so that the left and right two-part structure shown in fig. 3, i.e., the valve body 6 and the two-part structure which has been fixed as one body by the bracket 52, can be detachably fixed together. A sealing ring 9 is arranged between the connecting piece 13 and the valve body 6.

Referring to fig. 3 to 7, the movable valve element 2 is slidably accommodated in the connecting member 13 and the sleeve 12, the movable valve element 2 is of a hollow structure, the large elastic member 41 is located in the connecting member 13 and elastically abuts between the connecting member 13 and the movable valve element 2, and the elastic force provided by the large elastic member 41 urges the movable valve element 2 to abut against an end surface of the pressure relief portion 63 at the end where the inlet of the internal flow channel 65 is disposed, so as to close the inlet of the internal flow channel 65. An auxiliary valve port 70 communicated with the inner flow channel 65 is further arranged at the end, abutting against the inlet of the inner flow channel 65, of the movable valve core 2, the auxiliary valve core 3 is of a hollow structure and is slidably accommodated in the movable valve core 2, the small elastic piece 42 is arranged in the movable valve core 2 and elastically abuts against the space between the movable valve core 2 and the auxiliary valve core 3, and the elastic force provided by the small elastic piece 42 pushes the auxiliary valve core 3 to abut against the auxiliary valve core 3 and seal the auxiliary valve port 70. The large elastic member 41 and the small elastic member 42 are compression springs.

With reference to the direction in fig. 5, a first air gap length H1 is formed between the right side of the movable valve element 2 and the fixed valve element 11, one end of the auxiliary valve element 3 passes through the movable valve element 2 and is closer to the fixed valve element 11 relative to the movable valve element 2, a second air gap length H2 is formed between the right side of the auxiliary valve element 3 and the fixed valve element 11, the first air gap length H1 is greater than the second air gap length H2, and specifically, the first air gap length H1 may be twice as long as the second air gap length H2.

Referring to fig. 6 and 7, the side walls of the movable valve core 2 and the auxiliary valve core 3 are respectively provided with a first through hole 20 and a second through hole 30, and the number of the first through holes 20 and the second through holes 30 is two in the present embodiment. By providing the first through hole 20 and the second through hole 30, the inside of the valve body 6 and the inside of the auxiliary valve body 3 can be communicated with each other.

Preferably, the movable valve core 2 includes a first main body 21, a main rubber pad 22 and a first built-in spring 23. An accommodating groove 211 is formed in one end, away from the fixed valve core 11, of the first main body 21, the thickness of the main rubber pad 22 is slightly smaller than the width of the accommodating groove 211 and is placed in the accommodating groove 211, and the first built-in spring 23 is located in the first main body 21 and abuts against between the first main body 21 and the main rubber pad 22. When the movable valve core 2 is pressed against and seals the inlet of the inner flow passage 65, the main rubber pad 22 is in contact with the end face of the pressure relief part 63. Since the main rubber pad 22 is made of an elastic material such as rubber, the abutting is elastic, and the sealing performance is ensured while avoiding rigid collision. A metal auxiliary valve head 7 is embedded in the main rubber gasket 22, and an auxiliary valve port 70 is embedded in the auxiliary valve head 7.

The auxiliary spool 3 includes a second body 31, an auxiliary rubber pad 32, and a second built-in spring 33. An accommodating cavity 311 is formed at one end of the second body 31 away from the stationary valve element 11, an opening is formed in the left end wall of the second body 31 in the direction of fig. 5, the auxiliary rubber pad 32 is located in the accommodating cavity 311, and the second built-in spring 33 is also located in the accommodating cavity 311 and elastically abuts between the second body 31 and the auxiliary rubber pad 32. The auxiliary rubber gasket 32 abuts against the auxiliary valve head 7 to close the auxiliary valve port 70.

In other embodiments, the movable valve element 2 is not composed of a main body and a main rubber pad and is designed to be a single integral structure, and the auxiliary valve element 3 is also designed to be a single integral structure, so that the function of the electromagnetic valve can still be realized.

The working process of the electromagnetic valve is briefly explained as follows:

when the solenoid valve is not energized, the movable valve core 2 seals the inlet of the internal flow channel 65 under the pushing of the elastic force of the large elastic element 41, and the auxiliary valve core 3 seals the auxiliary valve port 70 under the pushing of the elastic force of the small elastic element 42, at this time, the whole solenoid valve is in a closed state.

When the electromagnetic valve is electrified, if the pressure of the medium in the valve body 6 is relatively small, namely the pressure borne by the movable valve core 2 is smaller than the electromagnetic force borne by the movable valve core 2, the movable valve core 2 moves backwards under the action of the electromagnetic force, the inner flow channel 65 is opened, and the electromagnetic valve is opened;

if the medium pressure is relatively high, namely the pressure borne by the movable valve core 2 is greater than the electromagnetic force borne by the movable valve core 2, the auxiliary valve core 3 starts to act. Because the magnitude of the electromagnetic force is inversely proportional to the square of the length of the air gap, the magnetic force applied to the auxiliary valve element 3 is relatively large when the auxiliary valve element is energized, and because the size of the auxiliary valve element 3 is smaller than that of the movable magnetic core, the medium pressure applied to the auxiliary valve element 3 is also much smaller than that applied to the movable valve element 2, so that the auxiliary valve element 3 can move backward at the moment to open the auxiliary valve port 70 for pressure relief. The medium pressure drops and when the pressure is small to a certain extent, the movable spool 2 can be sucked away, so that the internal flow passage 65 is opened.

Fig. 8 shows a second embodiment of the present invention, which is different from the previous embodiment mainly in that the auxiliary valve element 3 further includes an elastic nail 35, and the elastic nail 35 is made of a non-magnetic material and thus is not driven by the fixed valve element 11 in the solenoid valve.

According to the above description of the working process, when the electromagnetic valve is powered on and in the open state, the movable valve core 2 and the auxiliary valve core 3 are both tightly attached to the fixed valve core 11 under the action of the electromagnetic force. When the electromagnetic valve needs to be closed, the power supply is cut off, and the movable valve core 2 and the auxiliary valve core 3 should respond to the action and close the valve port in an ideal state, but in the practical application process, due to the problems of residual effect of a circuit and the like, the voltage of the electromagnetic valve after being cut off is not immediately reduced to 0 but is a value V1 which is larger than 0. In addition, in the known solenoid valve, the elastic resultant force provided by the large elastic element 41 and the small elastic element 42 can only overcome the electromagnetic force generated when the voltage value is V2, but the residual voltage V1 is greater than V2, so the problems that the movable valve element 2 and the auxiliary valve element 3 cannot be operated immediately after power failure and the solenoid valve cannot be closed immediately are caused.

The present embodiment is an optimized design for solving this problem. The elastic nail 35 is slidably disposed through the second main body 31 of the auxiliary valve element 3, and with reference to the direction in fig. 8, the left end of the elastic nail 35 has a radially expanded limiting structure, so that the elastic nail 35 can only slide in one direction relative to the second main body 31, the right end of the elastic nail 35 penetrates out of the second main body 31, and two ends of the second built-in spring 33 respectively abut against the auxiliary rubber pad 32 and the elastic nail 35.

When the solenoid valve is opened, the movable valve core 2 and the auxiliary valve core 3 move to the right under the action of magnetic force, and the elastic nail 35 is not influenced by the magnetic force, so that the elastic nail 35 moves to the left relative to the second main body 31 in the second main body 31, and the elastic nail 35 can also ensure that the elastic nail 35 moves to the left relative to the second main body 31 after abutting against the fixed valve core 11 because the elastic nail 35 protrudes out of the second main body 31. Under the relative movement relationship between the second body 31 and the elastic nail 35, the second built-in spring 33 is further compressed to store energy. When the electromagnetic valve is to be closed, the second built-in spring 33 provides the auxiliary valve core 3 with an elastic force separated from the fixed valve core 11 through the auxiliary rubber pad 32, and the resultant force of the large elastic element 41, the small elastic element 42 and the second built-in spring 33 can overcome the electromagnetic force generated when the voltage value is V1, so that the response speed of the movable valve core 2 and the auxiliary valve core 3 is remarkably improved, and the valve port can be closed immediately. Compared with the prior art, the electromagnetic valve has the advantages that the working flow of the electromagnetic valve is larger and the reliability is higher on the premise of designing the large through hole of the valve body 6 by arranging the large sealing valve core and the small sealing valve core.

The above disclosure is only a preferred embodiment of the present invention, and the function is to facilitate the understanding and implementation of the present invention, which is not to be construed as limiting the scope of the present invention, and therefore, the present invention is not limited to the claims.

Claims

1. The utility model provides a take supplementary case solenoid valve which characterized in that: comprises a fixed valve core, a movable valve core, an auxiliary valve core, a large elastic element, a small elastic element and a valve body with a cavity inside,

the valve body is provided with an air inlet and an air outlet, and an inner flow passage communicated with the air outlet is also arranged in the valve body, the fixed valve core is wound with a coil and positioned at one side of the valve body, the movable valve core is accommodated between the valve body and the fixed valve core in a sliding way, the large elastic piece is arranged in the valve body and pushes the movable valve core to be propped against the inlet of the inner flow passage, the movable valve core is of a hollow structure, the end part of the movable valve core is provided with an auxiliary valve port communicated with the inner flow passage, the auxiliary valve core is of a hollow structure and is accommodated in the movable valve core in a sliding manner, one end of the auxiliary valve core penetrates through the movable valve core and is closer to the fixed valve core relative to the movable valve core, the small elastic piece is arranged in the movable valve core and pushes the auxiliary valve core to abut against and close the auxiliary valve port, and a first through hole and a second through hole are respectively formed in the side walls of the movable valve core and the auxiliary valve core.

2. The solenoid valve with auxiliary spool according to claim 1, wherein: the electromagnetic valve with the auxiliary valve core further comprises a connecting piece, the valve body is fixedly connected with the fixed valve core through the connecting piece, the movable valve core slides in the connecting piece, and two ends of the large elastic piece respectively elastically abut against the connecting piece and the movable valve core.

3. The solenoid valve with auxiliary spool according to claim 2, wherein: the electromagnetic valve with the auxiliary valve core further comprises a sleeve, one end of the sleeve is fixed at one end of the fixed valve core, the connecting piece is fixed at the other end of the sleeve, and the movable valve core is slidably accommodated in the connecting piece and the sleeve.

4. The solenoid valve with auxiliary spool according to claim 2, wherein: the coil is accommodated in a coil shell, the coil shell is installed on a support, the connecting piece is located on one side of the support, and one end of the fixed valve core penetrates out of the other side of the support and is fixed through a fastener.

5. The solenoid valve with auxiliary spool according to claim 1, wherein: the valve body is internally provided with an L-shaped pressure relieving part, the pressure relieving part is provided with a pressure relieving surface facing the air inlet, the inner flow passage is arranged in the pressure relieving part, and the inlet of the inner flow passage is positioned on one side of the pressure relieving part, which deviates from the air inlet.

6. The solenoid valve with auxiliary spool according to claim 1, wherein: the movable valve core comprises a first main body and a main rubber pad which is arranged at one end of the first main body and is abutted against the inlet of the inner flow channel, and the auxiliary valve port is arranged on the main rubber pad.

7. The solenoid valve with auxiliary spool according to claim 6, wherein: the movable valve element comprises a first main body and a movable valve core, wherein one end of the first main body is provided with an accommodating groove, the thickness of the main rubber pad is slightly smaller than the width of the accommodating groove and is arranged in the accommodating groove, the movable valve core further comprises a first built-in spring, and two ends of the first built-in spring respectively elastically abut against the first main body and the main rubber pad.

8. The solenoid valve with auxiliary spool according to claim 6, wherein: a metal auxiliary valve head is embedded in the main rubber pad in a penetrating manner, the auxiliary valve port is arranged in the auxiliary valve head in a penetrating manner, and the auxiliary valve core abuts against the auxiliary valve head.

9. The solenoid valve with auxiliary spool according to claim 1, wherein: the auxiliary valve core comprises a second main body and an auxiliary rubber pad which is arranged at one end of the second main body and is abutted against the auxiliary valve port, and the auxiliary valve core also comprises a second built-in spring which is positioned in the second main body and elastically pushes the auxiliary rubber pad towards the auxiliary valve port.

10. The solenoid valve with auxiliary spool according to claim 9, wherein: the auxiliary valve core further comprises a non-magnetic elastic nail which is arranged in the second main body in a penetrating mode in a sliding mode, two ends of the second built-in spring respectively abut against the auxiliary rubber pad and the elastic nail, and one end, deviating from the second built-in spring, of the elastic nail penetrates out of the second main body.