CN212928952U

CN212928952U - Two-stage pulse valve

Info

Publication number: CN212928952U
Application number: CN202020478116.7U
Authority: CN
Inventors: 蒋孟杰; 马和平; 谭秋
Original assignee: Ningbo Shengda Sunshine Automation Technology Co ltd
Current assignee: Ningbo Shengda Sunshine Automation Technology Co ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2021-04-09
Anticipated expiration: 2030-03-31

Abstract

The utility model relates to a pulse valve technical field specifically indicates a second grade pulse valve. The valve comprises a valve body, wherein an assembly opening is formed in the upper end of the valve body, a first throat pipe is arranged in an inner cavity of the valve body, an exhaust opening communicated with the outside is formed in the lower end of the first throat pipe, and an air inlet communicated with the inner cavity of the valve body is formed in one side of the valve body; the assembly port is provided with a valve cover, a primary diaphragm is arranged between the valve cover and the assembly port, the valve cover is provided with a pressure relief mechanism, an inner cavity of the valve body is communicated with an inner cavity between the primary diaphragm and the valve cover through a first constant pressure hole, and the inner cavity between the primary diaphragm and the valve cover is communicated with the pressure relief mechanism; the utility model has reasonable structure, the pressure relief buckle on the diaphragm controls the flow between the cavities of the valve body, and the working stability of the pulse valve can be effectively improved and the CV flow of the pulse valve can be improved through pressure balance and pressure relief control; the whole part can be formed by die-casting, the machining workload is less, the material utilization rate is high, the production cost can be effectively reduced, and the competitiveness is improved.

Description

Two-stage pulse valve

Technical Field

The utility model relates to a pulse valve technical field specifically indicates a second grade pulse valve.

Background

In China, the situation of serious atmospheric pollution, the key points of the atmospheric pollution control work are 'structure adjustment, fire coal control, dust suppression and tail gas control'. From the perspective of pollution source control and industrial treatment feasibility, desulfurization, denitration and dust removal become three main means of atmospheric pollution treatment, and the market potential is huge. At present, the market urgently needs high-parameter high-added-value high-grade products with high technical content, and mainly depends on import. Therefore, the increase of the industrial output value can not depend on the increase of the quantity in any way, namely, the quality improvement is relied on, the product technology is promoted to be upgraded, so as to adapt to and pull the market demand to obtain greater development.

The pulse valve is a compressed air 'switch' of the dust cleaning and blowing system of the pulse bag type dust collector, and the pulse valve is controlled by the output signal of the pulse blowing controller to blow and blow the dust to the filter bags row by row, so that the resistance of the dust collector is kept within a set range, the processing capacity and the dust collection efficiency of the dust collector are ensured, and the pulse valve is suitable for the installation and connection of an air bag and a blowing pipe of the dust collector. Although the existing pulse valve is more used for reference of foreign advanced technology, the existing pulse valve still has defects in the aspects of cost and reliability, and is lack of competitiveness compared with imported products, so that the existing technology needs to be improved and developed through application of new materials and new processes.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's defect and not enough, provide a rational in infrastructure, action stable, the high second grade pulse valve of sensitivity.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model relates to a two-stage pulse valve, which comprises a valve body, wherein the upper end of the valve body is provided with an assembly port, a first choke is arranged in the inner cavity of the valve body, the lower end of the first choke is provided with an exhaust port communicated with the outside, and one side of the valve body is provided with an air inlet communicated with the inner cavity of the valve body; be equipped with the valve gap on the assembly opening, be equipped with the one-level diaphragm between valve gap and the assembly opening, be equipped with pressure release mechanism on the valve gap, pressure release mechanism is connected with the cooperation of one-level diaphragm, one of one-level diaphragm serves and is equipped with first constant voltage hole, and the inner chamber of valve body communicates the inner chamber between one-level diaphragm and the valve gap through first constant voltage hole, inner chamber and pressure release mechanism intercommunication between one-level diaphragm and the valve gap.

According to the scheme, the pressure relief mechanism comprises a guide rod, a magnetic push plate and a primary spring, the upper end of the guide rod is fixedly connected with the valve cover, and the primary spring is sleeved on the guide rod; the magnetic push plate is movably arranged at the lower end of the guide rod, and two ends of the spring are respectively connected with the magnetic push plate and the valve cover in an abutting mode; the bottom surface of the magnetic push plate is provided with a sealing gasket matched with the first throat pipe, the edge of the primary diaphragm is clamped and fixed by the assembling port and the valve cover, and the movable part at the center of the primary diaphragm is clamped between the magnetic push plate and the sealing gasket.

According to the scheme, the upper end face of the valve cover is provided with the pressure relief seat, the inner cavity of the pressure relief seat is internally provided with the second throat and the pressure relief channel, the lower port of the pressure relief channel is communicated with the inner cavity between the valve cover and the first-stage diaphragm, the first constant pressure hole is provided with the pressure relief buckle, and one side of the pressure relief seat is provided with the first pressure relief hole communicated with the second throat.

According to the scheme, the pressure relief mechanism further comprises a secondary sealing cover, a magnetic control plug and an electromagnetic controller, wherein the upper end of the pressure relief base is provided with an opening corresponding to the second choke, and the secondary sealing cover is assembled on the upper port of the pressure relief base; the electromagnetic controller is fixedly connected to the upper end face of the second-stage sealing cover, a guide hole is formed in the second-stage sealing cover, the magnetic control plug can vertically and movably penetrate through the electromagnetic controller, the lower end of the magnetic control plug penetrates through the guide hole, and a sealing head matched with the upper port of the second throat pipe is arranged at the lower end of the magnetic control plug.

According to the scheme, the valve cover and the pressure relief seat are of an integrally formed structure.

The utility model discloses beneficial effect does: the utility model has reasonable structure, the pressure relief buckle on the diaphragm controls the flow between the cavities of the valve body, and the working stability of the pulse valve can be effectively improved and the CV flow of the pulse valve can be improved through pressure balance and pressure relief control; the whole part can be formed by die-casting, the machining workload is less, the material utilization rate is high, the production cost can be effectively reduced, and the competitiveness is improved.

Drawings

Fig. 1 is a schematic view of the overall cross-sectional structure of the present invention.

In the figure:

1. a valve body; 2. a valve cover; 3. secondary sealing; 11. an air inlet; 12. an exhaust port; 13. an assembly port; 14. A first throat; 20. a first pressure relief vent; 21. a first-stage diaphragm; 22. a first constant pressure hole; 221. a pressure relief buckle; 23. a guide bar; 24. a magnetic push plate; 25. a primary spring; 26. a gasket; 27. a pressure relief seat; 28. A second throat; 29. a pressure relief channel; 31. a magnetic control plug; 32. an electromagnetic controller; 33. a guide hole; 34. And (6) sealing the head.

Detailed Description

The technical solution of the present invention will be described below with reference to the accompanying drawings and examples.

As shown in fig. 1, the two-stage pulse valve of the present invention comprises a valve body 1, wherein the upper end of the valve body 1 is provided with an assembly port 13, an inner cavity of the valve body 1 is provided with a first throat 14, the lower end of the first throat 14 is provided with an exhaust port 12 communicated with the outside, and one side of the valve body 1 is provided with an air inlet 11 communicated with the inner cavity thereof; be equipped with valve gap 2 on the assembly opening 13, be equipped with one-level diaphragm 21 between valve gap 2 and the assembly opening 13, be equipped with pressure release mechanism on the valve gap 2, pressure release mechanism is connected with the cooperation of one-level diaphragm 21, one of one-level diaphragm 21 serves and is equipped with first constant voltage hole 22, and the inner chamber of valve body 1 communicates the inner chamber between one-level diaphragm 21 and the valve gap 2, inner chamber and pressure release mechanism intercommunication between one-level diaphragm 21 and the valve gap 2 through first constant voltage hole 22.

Fig. 1 is the closing state of the present invention, wherein the inner cavity of the valve body 1 between the air inlet 11 and the one-level diaphragm 21 is the a cavity, the inner cavity between the one-level diaphragm 21 and the valve cover 2 is the B cavity, the cavity between the second throat 28 and the pressure relief hole 20 is the C cavity, and the inner cavity between the first throat 14 and the air outlet 12 is the D cavity, and the following description refers to the above definitions.

The first-stage diaphragm 21 is arranged between the valve cover 2 and the valve body 1, and the first-stage diaphragm 21 seals the first throat 14 under the control of the pressure relief mechanism, so that the cavity A, the cavity B and the cavity D respectively form relatively independent cavities; the cavity A corresponding to the air inlet 11 has normal pressure, the air outlet 12 corresponding to the cavity D is connected with the operation part, the primary diaphragm 21 can be driven through the action of the pressure relief mechanism so as to control the on-off of the first throat pipe 14, the on-off control is carried out between the cavity A and the cavity D, and the basic function of the pulse valve on the air path control is realized.

The first-stage diaphragm 21 is provided with a first constant pressure hole 22, the first constant pressure hole 22 is communicated with the cavity A and the cavity B to enable high pressure to exist in the cavity A and the cavity B, the first-stage diaphragm 21 is blocked on the first throat pipe 14, and low air pressure exists in the cavity D, so that pressure in the cavity B generates pressure on the first-stage diaphragm 21 to enable the first-stage diaphragm 21 to be in close contact with the first throat pipe 14, and therefore the stability of the open circuit control of the pulse valve is improved.

The pressure relief mechanism comprises a guide rod 23, a magnetic push plate 24 and a primary spring 25, the upper end of the guide rod 23 is fixedly connected with the valve cover 2, and the primary spring 25 is sleeved on the guide rod 23; the magnetic push plate 24 is movably arranged at the lower end of the guide rod 23, and two ends of the primary spring 25 are respectively connected with the magnetic push plate 24 and the valve cover 2 in an abutting mode; the bottom surface of the magnetic push plate 24 is provided with a sealing gasket 26 matched with the first throat 14, the edge of the primary diaphragm 21 is clamped and fixed by the assembling port 13 and the valve cover 2, and the movable part at the center of the primary diaphragm 21 is clamped between the magnetic push plate 24 and the sealing gasket 26.

The first-stage diaphragm 21 adopts a disc-shaped structure matched with the assembling port 13 to separate the valve cover 2 from the inner cavity of the valve body 1, the first-stage spring 25 applies pressure to the magnetic push plate 24 and directs to the first throat 14, so that the sealing gasket 26 is tightly attached to the port of the first throat 14, the first-stage diaphragm 21 realizes sealing and separation between AD cavities through the sealing gasket 26, and the pressure relief mechanism is used for pressurizing between the sealing gasket 26 and the first throat 14 so that the sealing gasket 26 and the first throat 14 are kept in tight contact.

The upper end face of the valve cover 2 is provided with a pressure relief seat 27, a second throat 28 and a pressure relief channel 29 are arranged in an inner cavity of the pressure relief seat 27, a lower port of the pressure relief channel 29 is communicated with the inner cavity between the valve cover 2 and the first-stage diaphragm 21, a pressure relief buckle 221 is arranged on the first constant pressure hole, and a first pressure relief hole 20 communicated with the second throat 28 is arranged on one side of the pressure relief seat 27.

In a normal state, the cavities AB are communicated through the pressure relief buckle 221, so that the pressure between the cavities AB and AB is kept balanced, and the pressure relief mechanism is in a closed state at the moment, so that high pressure exists in the cavity B, and the sealing gasket 26 and the first throat pipe 14 are pressurized to keep close contact; when the pressure relief mechanism is opened, the pressure in the cavity B is released to the outside through the pressure relief mechanism, the magnetic push plate 24 is attracted and the primary diaphragm 21 is driven to deform, the primary diaphragm is quickly bounced after the resistance of the primary spring 25 is overcome, and therefore the sealing gasket 26 is separated from the upper port of the first throat pipe 14, and the cavity AD is communicated.

The pressure relief mechanism further comprises a secondary sealing cover 3, a magnetic control plug 31 and an electromagnetic controller 32, an opening corresponding to the second throat 28 is formed in the upper end of the pressure relief seat 27, and the secondary sealing cover 3 is assembled on the upper port of the pressure relief seat 27; the electromagnetic controller 32 is fixedly connected to the upper end face of the second-stage sealing cover 3, a guide hole 33 is formed in the second-stage sealing cover 3, the magnetic control plug 31 can vertically and movably penetrate through the electromagnetic controller 32, the lower end of the magnetic control plug 31 penetrates through the guide hole 33, and a sealing head 34 matched with the upper end opening of the second throat pipe 28 is arranged at the lower end of the magnetic control plug 31.

The utility model discloses an operating principle, there is the ordinary pressure in the A chamber, solenoid controller 32 at first drives magnetic control end cap 31 and rises, opens the passageway between the BC chamber, and the interior pressure in the B chamber outwards discharges via first pressure release hole 20 to make the pressure in the B chamber descend fast, one-level diaphragm 21 can be out of shape easily under the decompression state this moment, under solenoid controller 32's suction effect, magnetic force push pedal 24 drives sealed pad 26 and rises along guide bar 23, thereby it is output pulse atmospheric pressure to make the BD chamber be opened the passageway between air inlet 11 and the gas vent 12 by the intercommunication. On the contrary, when the electromagnetic controller 32 is turned off, the magnetic plug 31 and the magnetic push plate 24 can respectively return to the normal state shown in fig. 1 by self-reset under the action of the spring force.

Valve gap 2 and pressure release seat 27 are integrated into one piece structure, and the integrated into one piece structure is convenient for cast molding, reduces machine tooling work load, and reduction in production cost improves the competitiveness of product.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims

1. A two-stage pulse valve, includes valve body (1), its characterized in that: an assembly opening (13) is formed in the upper end of the valve body (1), a first throat pipe (14) is arranged in the inner cavity of the valve body (1), an exhaust opening (12) communicated with the outside is formed in the lower end of the first throat pipe (14), and an air inlet (11) communicated with the inner cavity of the valve body (1) is formed in one side of the valve body (1); be equipped with valve gap (2) on assembly opening (13), be equipped with one-level diaphragm (21) between valve gap (2) and assembly opening (13), be equipped with pressure relief mechanism on valve gap (2), pressure relief mechanism is connected with one-level diaphragm (21) cooperation, one of one-level diaphragm (21) serves and is equipped with first constant voltage hole (22), and the inner chamber of valve body (1) communicates inner chamber between one-level diaphragm (21) and valve gap (2) through first constant voltage hole (22), inner chamber and pressure relief mechanism intercommunication between one-level diaphragm (21) and valve gap (2).

2. The two-stage pulse valve of claim 1, wherein: the pressure relief mechanism comprises a guide rod (23), a magnetic push plate (24) and a primary spring (25), the upper end of the guide rod (23) is fixedly connected with the valve cover (2), and the primary spring (25) is sleeved on the guide rod (23); the magnetic push plate (24) is movably arranged at the lower end of the guide rod (23), and two ends of the primary spring (25) are respectively connected with the magnetic push plate (24) and the valve cover (2) in an abutting mode; the bottom surface of the magnetic push plate (24) is provided with a sealing gasket (26) matched with the first throat pipe (14), the edge of the primary diaphragm (21) is clamped and fixed by the assembling port (13) and the valve cover (2), and the movable part at the center of the primary diaphragm (21) is clamped between the magnetic push plate (24) and the sealing gasket (26).

3. The two-stage pulse valve of claim 1, wherein: be equipped with pressure release seat (27) on the up end of valve gap (2), be equipped with second choke (28) and pressure release passageway (29) in the inner chamber of pressure release seat (27), the lower port intercommunication valve gap (2) of pressure release passageway (29) and one-level diaphragm (21) between the inner chamber, be equipped with on the first constant voltage hole and let out pressure and detain (221), one side of pressure release seat (27) is equipped with first pressure release hole (20) with second choke (28) intercommunication.

4. The two-stage pulse valve of claim 3, wherein: the pressure relief mechanism further comprises a secondary sealing cover (3), a magnetic control plug (31) and an electromagnetic controller (32), an opening corresponding to the second throat pipe (28) is formed in the upper end of the pressure relief seat (27), and the secondary sealing cover (3) is assembled on the upper port of the pressure relief seat (27); the electromagnetic controller (32) is fixedly connected to the upper end face of the second-stage sealing cover (3), a guide hole (33) is formed in the second-stage sealing cover (3), the magnetic control plug (31) can vertically and movably penetrate through the electromagnetic controller (32), the lower end of the magnetic control plug (31) penetrates through the guide hole (33), and a sealing head (34) matched with the upper end opening of the second throat pipe (28) is arranged at the lower end of the magnetic control plug (31).

5. The two-stage pulse valve of claim 3, wherein: the valve cover (2) and the pressure relief seat (27) are of an integrally formed structure.