CN220792222U - Piston type electromagnetic pulse valve - Google Patents

Abstract

The utility model discloses a piston type electromagnetic pulse valve, which relates to the field of valves and comprises a valve main body, a pilot component, a piston component and a return spring, wherein the pilot component is arranged on the valve main body, the piston component is slidably arranged in an inner cavity of the valve main body along the axial direction of the valve main body, and the piston component divides the inner cavity of the valve main body into a front air chamber and a rear air chamber; the return spring is arranged between the inner wall of the valve main body and the piston assembly, the piston assembly comprises a connecting block, a sealing gasket and a flexible sealing piece, and a gap exists between the periphery of the connecting block and the inner wall of the valve main body; the sealing gasket is connected to one side of the connecting block, which is far away from the valve main body, and is used for sealing the blowing pipe; the flexible sealing member is fixed to the connection block and is in sealing abutment between the connection block and the inner wall of the valve body. The utility model has the advantage that the piston assembly is not easy to be blocked.

Description

Piston type electromagnetic pulse valve

Technical Field

The utility model relates to the field of valves, in particular to a piston type electromagnetic pulse valve.

Background

The electromagnetic pulse valve is a control device in the bag type dust removing equipment system, and the air passage is controlled to be opened and closed through the electromagnetic pulse valve so as to realize the blowing of the blowing pipe.

The piston type electromagnetic pulse valve is one of pulse valves, an inner cavity of the electromagnetic pulse valve is partitioned by a piston, and the communication condition between the inner cavity of the electromagnetic pulse valve and the outside is controlled by an electromagnetic coil, so that the pressure difference at two sides of the piston is changed, and the piston is driven to slide back and forth to open or close the electromagnetic pulse valve.

In the existing piston type pulse valve, a gap of about 0.2mm exists between a piston and a valve body, because dust in the dust remover industry is larger, once particle pollutants such as dust enter between the piston and the valve body, the piston is easy to clamp, the piston is easy to expand in practical application due to the fact that the piston is mainly made of nylon and glass fibers, and the piston valve is also easy to clamp.

Disclosure of Invention

The utility model aims to solve the problem that a piston of a piston type electromagnetic valve is easy to be blocked in the prior art, and provides the piston type electromagnetic valve.

The utility model provides a piston type electromagnetic pulse valve, which comprises a valve main body, a pilot component, a piston component and a return spring, wherein the pilot component is arranged on the valve main body; the reset spring is arranged between the inner wall of the valve main body and the piston assembly and is used for driving the piston assembly to prop against the opening of the injection pipe, the piston assembly comprises a connecting block, a sealing gasket and a flexible sealing piece, and a gap exists between the periphery of the connecting block and the inner wall of the valve main body; the sealing gasket is connected to one side of the connecting block, which is far away from the valve main body, and is used for sealing the jetting pipe, and a gap exists between the sealing gasket and the inner wall of the valve main body; the flexible sealing member is fixed to the connection block and is in sealing abutment between the connection block and the inner wall of the valve body.

Optionally, the connecting block is provided with an orifice which is simultaneously communicated with the front air chamber and the rear air chamber.

Optionally, the gasket is fixed to a side of the connection block remote from the valve body, and the flexible seal is fixed to a side of the connection block remote from the gasket.

Optionally, a first connecting column is disposed on a side of the connecting block facing the sealing pad, and a first connecting hole adapted to the first connecting column is disposed on the sealing pad.

Optionally, a second connecting column is arranged on one side, away from the sealing gasket, of the connecting block, and a second connecting hole matched with the second connecting column is formed in the flexible sealing element.

Optionally, the peripheries of the first connecting column and the second connecting column are respectively provided with external threads, the first connecting column penetrates through the first connecting hole and is in threaded connection with a first nut, and the second connecting column penetrates through the second connecting hole and is in threaded connection with a second nut.

Optionally, the orifice includes a first hole section and a second hole section, the first hole section is radially disposed along the connection block and is communicated with the front air chamber, the second hole section axially extends along the connection block and penetrates through the second connection column, and the first hole section is communicated with the second hole section.

Optionally, the flexible seal member is a Y-shaped seal ring, and a notch of a Y-shaped groove of the Y-shaped seal ring faces an inner peripheral side wall of the valve body.

Optionally, a cushion pad is provided at an upper bottom portion of the inner chamber of the valve body, the cushion pad being located in the rear air chamber and being blocked on a sliding path of the piston assembly.

Optionally, a circle of air guiding inclined surface is formed on the inner peripheral side of the lower bottom of the valve main body, and the air guiding inclined surface is inclined in a direction away from the central axis of the valve main body.

In summary, the utility model has the following beneficial effects:

in the utility model, the piston type electromagnetic pulse valve controls the communication and the separation of the rear air chamber and the outside through the pilot assembly, thereby changing the pressure difference between the front air chamber and the rear air chamber, and driving the piston assembly to slide so as to realize the communication or the separation of the injection pipe and the front air chamber. Wherein, the piston assembly comprises a connecting block, a sealing gasket and a flexible sealing element; the sealing gasket is arranged at intervals with the inner wall of the valve main body and is used for controlling the on-off of the accompanying blowpipe; the connecting block is connected between the flexible sealing element and the sealing gasket to play a role of a framework; the piston assembly engages and seals against the inner wall of the valve body by means of a flexible seal, thereby separating the interior cavity of the valve body; because the flexible sealing element and the inner wall of the valve main body have no gap, dust is not easy to enter, and the flexible sealing element has deformability, the piston assembly is not easy to be blocked in the process of sliding along the inner wall of the valve main body; meanwhile, dust attached to the inner wall of the valve main body can be hung down in the sliding process of the flexible sealing element, so that self-cleaning of the valve main body is realized.

Drawings

Fig. 1 is a schematic diagram showing a semi-sectional structure of a piston type electromagnetic pulse valve, an air bag and a blowing pipe in a closed state according to an embodiment of the present utility model.

Fig. 2 is a schematic diagram of a semi-sectional structure of a piston type electromagnetic pulse valve according to an embodiment of the present utility model.

FIG. 3 is a schematic diagram of a semi-sectional structure of a pilot assembly and a valve cover according to an embodiment of the utility model.

FIG. 4 is a schematic diagram of a semi-sectional configuration of a piston assembly according to an embodiment of the present utility model.

Fig. 5 is a schematic diagram showing a semi-sectional structure of a piston electromagnetic pulse valve, an air bag and a blowing pipe in an opened state according to an embodiment of the present utility model.

In the figure:

1000. an electromagnetic pulse valve; 100. a valve body; 101. a front air chamber; 110. a valve body; 111. an air guide inclined plane; 112. a cushion pad; 120. a valve cover; 121. an exhaust hole; 122. a receiving groove; 130. a support ring; 102. a rear air chamber; 200. a pilot assembly; 210. a coil assembly; 220. an armature core; 230. a movable iron core; 300. a piston assembly; 310. a connecting block; 320. a sealing gasket; 321. a first connection hole; 330. a flexible seal; 331. a second connection hole; 340. a first connection post; 350. a second connection post; 360. a first nut; 370. a second nut; 380. an orifice; 381. a first bore section; 382. a second bore section; 400. a return spring; 500. an air bag; 600. a blowing pipe.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

The present embodiment discloses a piston type electromagnetic pulse valve 1000, referring to fig. 1, the piston type electromagnetic pulse valve 1000 includes a valve body 100, a pilot assembly 200, a piston assembly 300, and a return spring 400. The pilot assembly 200 is provided on the valve body 100. The piston assembly 300 is slidably disposed in the inner cavity of the valve body 100 along the axial direction of the valve body 100, and the piston assembly 300 partitions the inner cavity of the valve body 100 into a front air chamber 101 and a rear air chamber 102; the return spring 400 is disposed between the inner wall of the valve body 100 and the piston assembly 300.

The piston type electromagnetic valve is used for a bag type dust collector, specifically, a valve main body 100 of the piston type electromagnetic valve is fixed on an air bag 500 of the bag type dust collector, and the air bag 500 is communicated with a front air chamber 101. The piston assembly 300 is disposed above the blowing pipe 600 of the bag dust collector, and the piston assembly 300 can be sealed against the opening of the blowing pipe 600 under the driving of the return spring 400.

When the pilot assembly 200 is powered on, the pilot assembly 200 controls the rear air chamber 102 to communicate with the outside, a pressure difference is formed between the front air chamber 101 and the rear air chamber 102, and the piston assembly 300 is driven to slide in a direction away from the injection pipe 600 to open the injection pipe 600, and the air in the air bag 500 is injected and blown out through the injection pipe 600. When the pilot assembly 200 is powered off, the rear air chamber 102 is isolated from the outside, the front air chamber 101 and the rear air chamber 102 are pressure balanced, and the return spring 400 drives the piston assembly 300 to seal against the blowing pipe 600 to isolate the blowing pipe 600 from the front air chamber 101.

Referring to fig. 1 and 2, the valve body 100 includes a valve body 110 and a valve cover 120. The valve body 110 is a cylindrical member having one end opened and extended into the air bag 500 and the other end exposed to the outside of the air bag 500. The portion of the valve body 110 extending into the air pocket 500 is located above the outside of the opening of the injection pipe 600, and the end of the valve body 110 near the injection port forms an air intake gap into which the air flow flows with the injection pipe 600. The valve cover 120 covers the end of the valve body 110 away from the injection pipe 600 for installing the pilot assembly 200.

In the present embodiment, a circle of air guide inclined surface 111 is formed on the inner peripheral side of the lower bottom portion of the valve body 110 (i.e., the inner side of one end of the valve body 110 near the injection pipe 600). In a direction away from the central axis of the valve body 100, the air guiding slope 111 is inclined in a direction away from the pilot assembly 200, so that the air guiding slope 111 is inclined obliquely upward to better guide the air in the air bag 500 into the front air chamber 101. Meanwhile, the air guide inclined surface 111 can increase the gap between the inner peripheral side of the lower bottom of the valve body 110 and the injection pipe 600, and reduce the probability of collision with the injection pipe 600 when the valve body 110 is assembled.

In this embodiment, a supporting ring 130 is sleeved on the valve body 110, the supporting ring 130 is fixed on the outer side of the air bag 500, and the supporting ring 130 is sealed and attached to the outer peripheral side of the valve body 110, so as to facilitate connection between the valve body 110 and the air bag 500.

The end of the valve body 110 remote from the injection tube 600 is provided with an opening, and the valve cover 120 is fixed to the valve body 110 and covers the opening. The return spring 400 is disposed parallel to the axial direction of the valve body 110, one end of the return spring 400 abuts against the valve cover 120, and one end of the return spring 400 away from the valve cover 120 abuts against the piston assembly 300.

The valve cover 120 is provided with an exhaust hole 121 communicating the rear air chamber 102 with the outside. The pilot assembly 200 is provided at the exhaust hole 121 and can control the exhaust port communication or blocking.

Specifically, referring to fig. 1 to 3, the pilot assembly 200 includes a coil assembly 210, an armature core 220, and a moving core 230, the armature core 220 is fixed to the coil assembly 210, and the moving core 230 is disposed under the armature core 220 and blocked from the exhaust hole 121. The upper side wall of the exhaust hole 121 is provided with a receiving groove 122 for receiving the movable iron core 230, and the movable iron core 230 is disposed opposite to the receiving groove 122. When the coil assembly 210 is energized, the armature core 220 attracts the plunger 230 such that the plunger 230 at least partially enters the receiving slot 122, allowing the vent 121 to communicate with the environment and the rear air chamber 102. When the coil assembly 210 is powered off, the movable iron core 230 falls from the accommodating groove 122 and is blocked from the exhaust hole 121, so that the exhaust hole 121 is isolated from the outside.

Referring to fig. 1, 2 and 4, the piston assembly 300 includes a connection block 310, a sealing pad 320 and a flexible seal 330. The piston assembly 300 is disposed within the valve body 110. The gasket 320 and the flexible seal 330 are both disposed on the connection block 310 and slidably disposed along the axial direction of the inner cavity of the valve body 110 along with the connection block 310.

A gap exists between the outer circumference of the connection block 310 and the inner wall of the valve body 110 to avoid friction between the connection block 310 and the valve body 110. The sealing gasket 320 is connected to one side of the connection block 310 away from the valve body 100 (i.e., one side of the connection block 310 facing the blowing pipe 600), the sealing gasket 320 is disc-shaped and has a diameter larger than that of the blowing pipe 600, and the sealing gasket 320 is disposed directly above the blowing pipe 600 for sealing and abutting against the blowing pipe 600. There is a gap between the gasket 320 and the inner wall of the valve body 100 so that the gas in the gas bag 500 can normally enter the front gas chamber 101.

The flexible seal 330 is secured to the connector block 310 and seals against between the connector block 310 and the inner wall of the valve body 100 to separate the interior cavity of the valve body 110. In this embodiment, the flexible seal 330 is fixed to the side of the connection block 310 remote from the sealing pad 320. That is, the connection block 310 serves as a skeleton supporting packing 320 and a flexible seal 330, and the packing 320 and the flexible seal 330 are respectively disposed at opposite sides of the connection block 310.

The connection block 310 is provided with a first connection post 340 at a side facing the sealing pad 320, and the sealing pad 320 is provided with a first connection hole 321 adapted to the first connection post 340. The connection block 310 is provided with a second connection post 350 at a side far from the sealing pad 320, and the flexible sealing member 330 is provided with a second connection hole 331 adapted to the second connection post 350. The first connection post 340 passes through the first connection hole 321 to connect the sealing pad 320 to the connection block 310, and the second connection post 350 passes through the second connection hole 331 to connect the flexible sealing member 330 to the connection block 310. The arrangement mode ensures that the sealing gasket 320, the connecting block 310 and the flexible sealing element 330 are convenient to connect and stable in structure.

The outer circumferences of the first connecting post 340 and the second connecting post 350 are respectively provided with external threads, the first connecting post 340 passes through the first connecting hole 321 and is in threaded connection with a first nut 360, and the second connecting post 350 passes through the second connecting hole 331 and is in threaded connection with a second nut 370. Thus, the first and second nuts 360 and 370 provided at both sides clamp the sealing gasket 320, the connection block 310 and the flexible seal 330, so that the overall structure is more secure, and the sealing gasket 320 and the flexible seal 330 are not easily separated from the connection block 310.

The connecting block 310 is provided with an orifice 380 for simultaneously communicating the front air chamber 101 and the rear air chamber 102. Specifically, orifice 380 includes a first orifice segment 381 and a second orifice segment 382, first orifice segment 381 being disposed radially along connection block 310 and communicating with front plenum 101, second orifice segment 382 extending axially along connection block 310 and communicating with rear plenum 102 through second connection post 350, first orifice segment 381 communicating with second orifice segment 382. The gas in front chamber 101 can thereby be replenished into rear chamber 102 through orifice 380 to balance the pressure differential across front chamber 101 and rear chamber 102.

The maximum flow area of orifice 380 is smaller than the maximum flow area of vent hole 121, so that when vent hole 121 is open, the air flow from front air chamber 101 into rear air chamber 102 is smaller than the air flow from rear air chamber 102 to the outside, ensuring that front and rear air chambers 102 can form a pressure difference.

In this embodiment, the flexible seal 330 is a Y-shaped seal ring. The notch of the Y-shaped groove of the Y-shaped sealing ring faces the inner peripheral side wall of the valve body 110, so that the flexible sealing element 330 is better attached to the inner wall of the valve body 110, and the sealing effect is better.

Wherein, the upper bottom portion of the inner cavity of the valve body 110 (i.e., the inner wall of the end of the valve body 110 away from the injection tube 600) is provided with a cushion pad 112, and the cushion pad 112 is located in the rear air chamber 102 and is blocked on the sliding path of the piston assembly 300. When the pilot assembly 200 is energized, the piston assembly 300 moves away from the injection tube 600 under the action of the pressure difference between two sides until the flexible sealing element 330 abuts against the buffer element, the buffer element plays a role in buffering the piston assembly 300 and the upper bottom part of the valve body 110, and the impact of the piston assembly 300 during sliding is reduced, so that the piston electromagnetic pulse valve 1000 is more stable during operation.

The working principle of the piston type electromagnetic pulse valve 1000 of the utility model is as follows:

referring to fig. 1, when the pilot assembly 200 is powered on, the exhaust hole 121 is communicated with the rear air chamber 102 and the outside, the piston assembly 300 moves away from the blowing pipe 600 under the pressure difference of two sides until the flexible sealing member 330 abuts against the cushion pad 112, so that the sealing pad 320 is separated from the blowing pipe 600, and the air in the air bag 500 can enter the front air chamber 101 through the air inlet gap and then be blown out through the blowing pipe 600.

Referring to fig. 5, when the pilot assembly 200 is powered off, the exhaust hole 121 is isolated from the outside, and the gas in the front gas chamber 101 flows into the rear gas chamber 102 through the orifice 380, balancing the pressure difference of the front gas chamber 101 and the rear gas chamber 102. The return spring 400 drives the piston assembly 300 to slide in a direction approaching the lance 600 until the gasket 320 seals against the opening of the lance 600.

In this process, since there is no gap between the flexible sealing member 330 and the inner wall of the valve body 110, dust is not easy to enter, and the flexible sealing member 330 has deformability, so that the piston assembly 300 is not easy to be blocked in the process of sliding along the inner wall of the valve body 110; meanwhile, dust attached to the inner wall of the valve body 100 can be hung down in the sliding process of the flexible sealing element 330, so that self-cleaning of the valve body 110 is realized.

The foregoing description is only of the preferred embodiments of the utility model, and all changes and modifications that come within the meaning and range of equivalency of the structures, features and principles of the utility model are therefore intended to be embraced therein.

Claims (10)

1. The utility model provides a piston electromagnetic pulse valve, includes valve main part (100), guide's subassembly (200), piston subassembly (300) and reset spring (400), guide's subassembly (200) set up in on valve main part (100), piston subassembly (300) along the axial of valve main part (100) slidable set up in the inner chamber of valve main part (100), piston subassembly (300) are with the inner chamber of valve main part (100) is divided into front air chamber (101) and back air chamber (102); the return spring (400) is arranged between the inner wall of the valve main body (100) and the piston assembly (300) and is used for driving the piston assembly (300) to tightly lean against the opening of the injection pipe (600), and is characterized in that the piston assembly (300) comprises a connecting block (310), a sealing gasket (320) and a flexible sealing piece (330), and a gap exists between the periphery of the connecting block (310) and the inner wall of the valve main body (100); the sealing gasket (320) is connected to one side of the connecting block (310) away from the valve main body (100) and is used for sealing the injection pipe (600), and a gap exists between the sealing gasket (320) and the inner wall of the valve main body (100); the flexible seal (330) is secured to the connection block (310) and seals against between the connection block (310) and an inner wall of the valve body (100).

2. A piston type electromagnetic pulse valve as defined in claim 1, wherein said connecting block (310) is provided with an orifice (380) for simultaneously communicating said front air chamber (101) and said rear air chamber (102).

3. A piston type electromagnetic pulse valve as defined in claim 2, wherein said sealing gasket (320) is fixed to a side of said connection block (310) remote from said valve main body (100), and said flexible seal member (330) is fixed to a side of said connection block (310) remote from said sealing gasket (320).

4. A piston type electromagnetic pulse valve as defined in claim 3, characterized in that a first connecting post (340) is provided on a side of said connecting block (310) facing said sealing pad (320), and a first connecting hole (321) adapted to said first connecting post (340) is provided on said sealing pad (320).

5. A piston type electromagnetic pulse valve as defined in claim 4, characterized in that a second connecting post (350) is arranged on one side of the connecting block (310) away from the sealing gasket (320), and a second connecting hole (331) adapted to the second connecting post (350) is arranged on the flexible sealing member (330).

6. The piston type electromagnetic pulse valve according to claim 5, wherein the outer circumferences of the first connecting post (340) and the second connecting post (350) are provided with external threads, the first connecting post (340) passes through the first connecting hole (321) and is screwed to a first nut (360), and the second connecting post (350) passes through the second connecting hole (331) and is screwed to a second nut (370).

7. A piston type electromagnetic pulse valve as defined in claim 5, wherein said orifice (380) includes a first orifice section (381) and a second orifice section (382), said first orifice section (381) being disposed radially along said connecting block (310) and communicating with said front plenum (101), said second orifice section (382) extending axially along said connecting block (310) and extending through said second connecting post (350), said first orifice section (381) communicating with said second orifice section (382).

8. A piston type electromagnetic pulse valve as defined in claim 1, wherein said flexible seal member (330) is a Y-shaped seal ring with a notch of a Y-shaped groove of said Y-shaped seal ring facing an inner peripheral side wall of said valve body (100).

9. A piston type electromagnetic pulse valve as defined in claim 1, wherein an upper bottom portion of an inner cavity of said valve body (100) is provided with a cushion pad (112), said cushion pad (112) being located in said rear air chamber (102) and blocked on a sliding path of said piston assembly (300).

10. A piston type electromagnetic pulse valve according to claim 1, characterized in that a ring of air guiding inclined surface (111) is formed on the inner peripheral side of the lower bottom of the valve main body (100), and the air guiding inclined surface (111) is inclined in a direction away from the central axis of the valve main body (100) and in a direction away from the pilot assembly (200).