CN213629011U

CN213629011U - Diaphragm type electromagnetic valve

Info

Publication number: CN213629011U
Application number: CN202021737399.9U
Authority: CN
Inventors: 韩润虎
Original assignee: Zhejiang Dunan Artificial Environment Co Ltd
Current assignee: Zhejiang Dunan Artificial Environment Co Ltd
Priority date: 2020-08-19
Filing date: 2020-08-19
Publication date: 2021-07-06
Anticipated expiration: 2030-08-19

Abstract

The utility model relates to a control technical field especially relates to a diaphragm formula solenoid valve. The utility model provides a diaphragm type electromagnetic valve, which comprises a valve seat and a diaphragm unit, wherein the valve seat is internally provided with a valve port, and the diaphragm unit is arranged in the valve seat and used for opening and closing the valve port; the diaphragm unit comprises a seat body and a diaphragm, the diaphragm is sleeved on the seat body, the edge of the diaphragm is erected on the valve seat, the diaphragm is made of metal, and the diaphragm can deform under the action of medium pressure to open and close the valve port. Compared with the prior art, the utility model has the advantages of: thereby solved the problem that traditional diaphragm can not resist high temperature through the diaphragm that adopts the metal material, promoted the high temperature resistant intensity of diaphragm reduces the temperature to the influence of diaphragm sealing performance makes the diaphragm still can keep normal work under high temperature.

Description

Diaphragm type electromagnetic valve

Technical Field

The utility model relates to a control technical field especially relates to a diaphragm formula solenoid valve.

Background

The electromagnetic valve can be divided into a direct-acting type, a diaphragm type and a piston type according to the form of a valve core. The diaphragm type electromagnetic valve controls the opening/closing of the electromagnetic valve by deforming the diaphragm.

The diaphragm of the existing diaphragm type electromagnetic valve is made of nonmetal materials such as Teflon and the like, and the highest working temperature is not more than 120 ℃; when the working temperature exceeds 120 ℃, the membrane has the problems of delamination, bubbling and the like, the sealing property is influenced, and the membrane can not work at all when the working temperature is serious.

SUMMERY OF THE UTILITY MODEL

In view of this, to above-mentioned technical problem, the utility model provides a diaphragm formula solenoid valve, technical scheme is as follows:

the utility model provides a diaphragm type electromagnetic valve, which comprises a valve seat and a diaphragm unit, wherein a valve port is arranged in the valve seat, and the diaphragm unit is arranged in the valve seat and used for opening and closing the valve port; the diaphragm unit comprises a seat body and a diaphragm, the diaphragm is sleeved on the seat body, the edge of the diaphragm is erected on the valve seat, the diaphragm is made of metal, and the diaphragm can deform under the action of medium pressure to open and close the valve port.

So set up, can solve the problem that traditional diaphragm is not high temperature resistant, promote the high temperature resistant intensity of diaphragm reduces the temperature and is right the influence of diaphragm sealing performance makes the diaphragm still can keep normal work under high temperature.

In one embodiment, the surface of the membrane is wrapped with a sealing coating, and the sealing coating is a non-metal coating.

So set up, help promoting the leakproofness of diaphragm reduces leakage rate.

In one embodiment, the non-metal coating is any one of a teflon coating or a silicone rubber coating.

So set up, can promote the sealing performance of diaphragm makes the diaphragm reduces leakage rate at the during operation.

In one embodiment, the thickness of the membrane is L, and L is less than or equal to 0.5 mm.

So set up, thickness can influence the deformation volume of diaphragm more than 0.5mm to increase the degree of difficulty that the diaphragm warp.

In one embodiment, the diaphragm is made of stainless steel or manganese steel.

By the arrangement, the strength of the pressure borne by the diaphragm at the valve port is improved.

In one embodiment, the diaphragm unit further includes a backing, the outer wall of the seat has a step, the diaphragm is sleeved on the seat and abuts against the step, and the backing is sleeved on the seat and abuts against a side of the diaphragm away from the step.

According to the arrangement, the existing metal reinforcing plate is omitted in the diaphragm unit, the process is simplified, the installation difficulty is reduced, and the machining precision is improved.

In one embodiment, the diaphragm is provided with a balance hole, the seat body is provided with a flow port, and the caliber of the balance hole is smaller than that of the flow port.

The arrangement is that the medium flow of the balance hole is smaller than that of the flow port, so that a pressure difference is formed between the upper part and the lower part of the diaphragm, and the opening/closing of the valve port is controlled.

In one embodiment, the diaphragm type solenoid valve further comprises a sealing element and an iron core unit, wherein the sealing element is mounted on the iron core unit, and the iron core unit can move relative to the valve port and drives the sealing element to open/close the flow port so as to control the diaphragm to open/close the valve port.

In one embodiment, the diaphragm type solenoid valve further comprises a sleeve and a coil, the sleeve is fixed on the valve seat, the coil is sleeved on the sleeve, and the iron core unit is arranged in the sleeve and can be close to or far away from the valve port under the action of the coil.

In one embodiment, the core unit includes a fixed core, a movable core and an elastic member, the fixed core is fixed in the sleeve, the sealing member is mounted on the movable core, and the movable core can move in the sleeve relative to the valve port to drive the sealing member to seal the flow port;

the elastic piece is arranged between the fixed iron core and the movable iron core, one end of the elastic piece is connected with the fixed iron core, and the other end of the elastic piece is connected with the movable iron core.

Compared with the prior art, the utility model provides a diaphragm formula solenoid valve, through inciting somebody to action the diaphragm adopts the metal material to solved the problem that traditional diaphragm can not resist high temperature, promoted the high temperature resistant intensity of diaphragm, it is right to reduce the temperature the influence of diaphragm sealing performance makes the diaphragm still can keep normal work under high temperature.

Drawings

Fig. 1 is a schematic structural diagram of a diaphragm type electromagnetic valve in a power-off state provided by the present invention;

fig. 2 is a schematic structural diagram of a membrane type solenoid valve in a power-on state;

fig. 3 is a schematic structural diagram of a diaphragm unit in the diaphragm solenoid valve provided by the present invention.

The symbols in the drawings represent the following meanings:

100. a diaphragm type solenoid valve; 10. a valve seat; 11. a valve port; 12. a valve cavity; 13. an inlet; 14. an outlet; 15. mounting holes; 20. a sleeve; 21. an iron core unit; 211. fixing an iron core; 212. a movable iron core; 2121. an accommodating chamber; 22. an elastic member; 23. a seal member; 30. a coil; 40. a diaphragm unit; 41. a base body; 411. a spout; 412. a step; 42. a membrane; 421. a balance hole; 422. a seal coat; 43. a backing.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, the present invention provides a diaphragm type solenoid valve 100, in which the diaphragm type solenoid valve 100 is mainly used to control the automatic on/off of the medium in the pipeline or adjust the flow rate of the medium in the pipeline, and is widely applied to the refrigeration field, the pipeline transportation field, and other fields.

As shown in fig. 1 to 3, the diaphragm type solenoid valve 100 includes a valve seat 10 and a diaphragm unit 40, wherein the valve seat 10 has a valve port 11 therein, and the diaphragm unit 40 is installed in the valve seat 10 and is used for opening and closing the valve port 11; the diaphragm unit 40 includes a seat 41 and a diaphragm 42, the diaphragm 42 is sleeved on the seat 41, and the edge of the diaphragm 42 is set up on the valve seat 10; meanwhile, the diaphragm 42 is made of metal, and the diaphragm 42 can deform under the action of medium pressure to open and close the valve port 11; it can be understood that the material of the membrane 42 is set to be metal, and under general conditions, because metal has better temperature resistance compared with non-metal materials such as teflon, the problem that the traditional membrane 42 is not high temperature resistant is effectively solved, the influence of temperature on the sealing performance of the membrane 42 is reduced, and the membrane 42 can still keep normal work at high temperature. It should be explained that the high temperature described in this application means that the operating temperature of the diaphragm solenoid valve 100 is greater than or equal to 120 degrees celsius.

The valve seat 10 is respectively provided with an inlet 13 and an outlet 14, the inlet 13 and the outlet 14 are respectively connected with corresponding connecting pipes, the valve cavity 12 is arranged in the valve seat 10, the valve cavity 12 is also internally provided with a valve port 11 for communicating the inlet 13 with the outlet 14, and the on/off between the inlet 13 and the outlet 14 is adjusted and controlled by controlling the on/off of the valve port 11.

The end of the valve seat 10 far away from the valve port 11 is provided with a mounting hole 15, one end of the sleeve 20 is provided with an opening, and the end of the sleeve 20 with the opening is mounted in the mounting hole 15, so that the interior of the sleeve 20 is communicated with the valve cavity 12; at the same time, the sleeve 20 is in sealing connection with the inner wall of the mounting hole 15 to prevent the medium in the valve seat 10 from flowing out of the gap between the sleeve 20 and the inner wall of the mounting hole 15.

Preferably, the mating and abutting positions of the valve seat 10 and the sleeve 20 can be connected by welding, screw/bolt connection, etc. In the present embodiment, the valve seat 10 and the sleeve 20 are connected by laser welding or argon arc welding.

As shown in fig. 1 and 2, the sleeve 20 further accommodates an iron core unit 21 and a sealing member 23, the sealing member 23 is mounted on the iron core unit 21, the iron core unit 21 can move relative to the valve port 11, and the sealing member 23 is driven to open/close the valve port 11 to control on/off of a medium.

Specifically, the core unit 21 includes a movable core 212 and a fixed core 211, wherein the fixed core 211 is fixedly connected to one end of the sleeve 20 away from the valve port 11, the movable core 212 can freely slide in the sleeve 20 toward the direction close to/away from the fixed core 211, an elastic member 22 is further abutted between the movable core 212 and the fixed core 211, one end of the elastic member 22 is connected with the fixed core 211, and the other end is connected with the movable core 212; when the movable iron core 212 moves towards the fixed iron core 211, the elastic member 22 is in a compressed state, and when the movable iron core 212 moves away from the fixed iron core 211, the elastic member 22 is in a stretched state.

Preferably, the movable core 212 is provided with a receiving cavity 2121 near one end of the fixed core 211, and one end of the elastic element 22 is received in the receiving cavity 2121 to prevent the elastic element 22 from swinging during compression or extension, thereby affecting the normal movement of the movable core 212 inside the sleeve 20.

Alternatively, the elastic member 22 may be a spring or any other elastic member, which is not limited herein.

Further, in the diaphragm-type solenoid valve 100, the material of the sealing member 23 may be nitrile rubber, epdm or fluororubber, and in this case, the material of the sealing member 23 is epdm having excellent oxidation resistance, ozone resistance and corrosion resistance, and among all materials, epdm has the lowest specific gravity and can absorb a large amount of filler and oil without affecting the characteristics, so that a rubber compound with low cost can be manufactured.

As shown in fig. 1 and fig. 2, the diaphragm-type solenoid valve 100 further includes a coil 30, the coil 30 is sleeved on the sleeve 20, and when the coil 30 sleeved outside the sleeve 20 is energized, the movable iron core 212 overcomes the acting force of the elastic member 22 to move towards the fixed iron core 211 under the action of the electromagnetic force of the coil 30, and drives the sealing member 23 to move away from the valve port 11; when the coil 30 sleeved outside the sleeve 20 is powered off, the electromagnetic field disappears, the electromagnetic force between the movable iron core 212 and the fixed iron core 211 weakens, the movable iron core 212 moves away from the fixed iron core 211 under the action of the elastic element 22, and the sealing element 23 is driven to move towards the valve port 11.

As shown in fig. 3, the diaphragm unit 40 is located in the valve chamber 12, and the diaphragm unit 40 is a key component for opening/closing the valve port 11 and plays a crucial role in the operation of the diaphragm-type solenoid valve 100.

Specifically, the outer wall of the seat body 41 has a step 412, the diaphragm 42 is sleeved on the seat body 41 and abuts against the step 412, the edge of the diaphragm 42 is overlapped on the valve seat 10, and the diaphragm 42 can deform under the action of the medium pressure to open and close the valve port 11.

Preferably, the metal material of the diaphragm 42 is stainless steel or manganese steel, so as to increase the strength of the pressure applied to the diaphragm 42 at the valve port 11.

Further, the surface of the membrane 42 is wrapped with a sealing coating 422, and the sealing coating 422 is a non-metal coating, which is helpful to improve the sealing performance of the membrane 42 and reduce the leakage rate.

Preferably, the non-metal coating can be any one of a teflon coating or a silicon rubber coating, so that the problem that the traditional diaphragm is not high-temperature resistant can be solved, the high-temperature resistant strength of the diaphragm 42 is improved, the influence of temperature on the sealing performance of the diaphragm 42 is reduced, the diaphragm 42 can still normally work at high temperature, the sealing performance of the diaphragm 42 can be improved, and the leakage rate is reduced; of course, in other embodiments, the material of the membrane 42 may be other materials.

Further, in the present embodiment, the thickness of the membrane 42 is L, and L is less than or equal to 0.5 mm; the thickness L exceeding 0.5mm affects the deformation amount of the diaphragm 42, thereby increasing the difficulty of deformation of the diaphragm 42 and being unfavorable for opening the valve port 11.

Preferably, the thickness L of the membrane 42 may be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, and any value falling within this range; of course, in other embodiments, the thickness L of the membrane 42 may have other values, and is not limited herein.

Further, the diaphragm 42 is further provided with a balance hole 421, and the balance hole 421 is used for balancing the pressure difference between the upper side and the lower side of the diaphragm 42.

Preferably, the seat body 41 is provided with a flow port 411, and an aperture of the balance hole 421 is smaller than an aperture of the flow port 411, so that a medium flow rate of the balance hole 421 is smaller than a medium flow rate of the flow port 411, thereby forming a pressure difference between the upper side and the lower side of the diaphragm 42 (i.e. forming a pressure difference on two sides of the diaphragm 42), and under the pressure difference, the diaphragm 42 is deformed, so as to control the opening/closing of the valve port 11.

As shown in fig. 3, the diaphragm unit 40 further includes a backing 43, the backing 43 is sleeved on the seat 41 and abuts against a side of the diaphragm 42 away from the step 412, and the backing 43 is used for supporting and fixing the diaphragm 42; compared with the prior art, the diaphragm unit 40 omits a metal reinforcing plate, so that the process is simplified, the installation difficulty is reduced, and the processing precision is improved.

Preferably, the backing 43 and the seat body 41 are integrally machined, the machining mode can adopt turning, the dimensional accuracy and the coaxiality are good, and compared with the prior art that a gasket of a stamping part is adopted, the diaphragm type electromagnetic valve 100 can enable the flow to be more stable and the flow consistency to be good; in other embodiments, the backing 43 and the seat body 41 can be provided separately.

The utility model provides a diaphragm formula solenoid valve 100's theory of operation does: when the coil 30 is energized, the movable iron core 212 drives the sealing element 23 to move towards the fixed iron core 211 under the action of electromagnetic force, the sealing element 23 is far away from the flow port 411, the flow port 411 is opened, the high-pressure fluid gathered in the cavity above the diaphragm 42 is decompressed through the flow port 411, so that the pressure above the diaphragm 42 is smaller than the pressure below the diaphragm 42, the diaphragm 42 deforms under the action of differential pressure, the valve port 11 is opened, the inlet 13, the outlet 14 and the valve cavity 12 are communicated, and therefore the medium at the inlet 13 flows out to the outlet 14.

When the coil 30 is powered off, the electromagnetic field of the coil 30 disappears, the movable iron core 212 is pushed towards the direction far away from the fixed iron core 211 under the action of the restoring force of the elastic element 22, the sealing element 23 seals the flow opening 411 at first, and then the high-pressure fluid of the inlet 13 enters the cavity above the diaphragm 42 through the balance hole 421 to establish high pressure in the cavity above the diaphragm 42, so that the upper pressure and the lower pressure of the diaphragm 42 are gradually balanced; the elastic member 22 further pushes the diaphragm 42 to press down until the diaphragm 42 covers the whole valve port 11, the inlet 13 and the outlet 14 are not communicated with each other, and the diaphragm type solenoid valve 100 is closed.

The utility model provides a diaphragm formula solenoid valve 100 is through the diaphragm 42 that adopts the metal material to solved the problem that traditional diaphragm can not resist high temperature, promoted diaphragm 42 high temperature resistant strength, it is right to reduce the temperature diaphragm 42 sealing performance's influence makes diaphragm 42 still can keep normal work under high temperature.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A diaphragm type electromagnetic valve comprises a valve seat (10) and a diaphragm unit (40), wherein a valve port (11) is formed in the valve seat (10), and the diaphragm unit (40) is installed in the valve seat (10) and used for opening and closing the valve port (11);

the valve is characterized in that the diaphragm unit (40) comprises a seat body (41) and a diaphragm (42), the diaphragm (42) is sleeved on the seat body (41), the edge of the diaphragm (42) is erected on the valve seat (10), the diaphragm (42) is made of metal, and the diaphragm (42) can deform under the action of medium pressure to open and close the valve port (11).

2. The diaphragm solenoid valve of claim 1, wherein the diaphragm (42) is surface coated with a sealing coating (422), and the sealing coating (422) is a non-metallic coating.

3. The diaphragm solenoid valve of claim 2, wherein the non-metallic coating is any one of a teflon coating or a silicone rubber coating.

4. The diaphragm-type solenoid valve according to claim 1, characterized in that the thickness of the diaphragm (42) is L, and L is less than or equal to 0.5 mm.

5. The diaphragm solenoid valve according to claim 1, characterized in that the material of the diaphragm (42) is stainless steel or manganese steel.

6. The diaphragm type solenoid valve of claim 1, wherein the diaphragm unit (40) further comprises a backing, the seat (41) has a step (412) on an outer wall thereof, the diaphragm (42) is sleeved on the seat (41) and abuts against the step (412), and the backing is sleeved on the seat (41) and abuts against a side of the diaphragm (42) away from the step (412).

7. The diaphragm type electromagnetic valve according to claim 1, wherein the diaphragm (42) is provided with a balance hole (421), the seat body (41) is provided with a flow port (411), and a caliber of the balance hole (421) is smaller than a caliber of the flow port (411).

8. The diaphragm type solenoid valve according to claim 7, further comprising a sealing member (23) and a core unit (21), wherein the sealing member (23) is mounted on the core unit (21), and the core unit (21) is capable of moving relative to the valve port (11) and driving the sealing member (23) to open/close the flow port (411) to control the diaphragm (42) to open/close the valve port (11).

9. The diaphragm type solenoid valve according to claim 8, further comprising a sleeve (20) and a coil (30), wherein the sleeve (20) is fixed on the valve seat (10), the coil (30) is sleeved on the sleeve (20), and the core unit (21) is disposed in the sleeve (20) and can be close to or far from the valve port (11) under the action of the coil (30).

10. The diaphragm type solenoid valve according to claim 9, wherein the core unit (21) comprises a fixed core (211), a movable core (212) and an elastic member (22), the fixed core (211) is fixed in the sleeve (20), the sealing member (23) is mounted on the movable core (212), and the movable core (212) can move in the sleeve (20) relative to the valve port (11) to drive the sealing member (23) to seal the flow port (411);

the elastic piece (22) is arranged between the fixed iron core (211) and the movable iron core (212), one end of the elastic piece (22) is connected with the fixed iron core (211), and the other end of the elastic piece is connected with the movable iron core (212).