CN219673450U

CN219673450U - Normally open electromagnetic pilot valve

Info

Publication number: CN219673450U
Application number: CN202222970796.6U
Authority: CN
Inventors: 周敏杰; 周鹏; 周柯
Original assignee: Changzhou Amg Refrigeration Equipment Co ltd
Current assignee: Changzhou Amg Refrigeration Equipment Co ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-09-12
Anticipated expiration: 2032-11-08

Abstract

The utility model relates to the technical field of electromagnetic valves, in particular to a normally open electromagnetic pilot valve, which comprises a pilot valve base and a hollow stretching sleeve with an opening at the bottom end, wherein a threaded hole is formed in the middle of the top end of the pilot valve base; the utility model has simple structural design, high reliability and long service life.

Description

Normally open electromagnetic pilot valve

Technical Field

The utility model relates to the technical field of electromagnetic valves, in particular to a normally open electromagnetic pilot valve.

Background

Solenoid valves are electronically operated valves that are commonly used to control the flow of fluids or gases. The solenoid valves may be classified into a normally open type and a normally closed type according to the difference of the operation mode and the control mode. The normally open electromagnetic valve mainly comprises a valve body, an electromagnetic coil, a movable iron core, a static iron core, a valve core and a valve, when the normally open electromagnetic valve works, the electromagnetic coil is electrified, and the movable iron core moves towards the static iron core under the action of electromagnetic force so as to drive the valve to move towards the valve core, and therefore the electromagnetic valve is closed.

The valve core and the base are not firmly connected in the existing electromagnetic valve, mainly are in threaded connection, if the hydraulic pressure or the air pressure in the valve is large, the valve core is easy to move upwards or deviate, the valve core can be worn in the closing process of the valve core and the valve for a long time, the normal use of the electromagnetic valve is affected, the reliability is reduced, and the service life of the electromagnetic valve is affected. In addition, when moving the iron core to the static iron core direction and realizing the closing of solenoid valve, moving the iron core and can striking static iron core, under the condition of high frequency switching, if the static iron core is not firm enough with the connection of valve body, static iron core can take place the position movement for the valve body, and then the motion stroke of moving the iron core can change to influence the normal use of solenoid valve, the reliability is low.

Disclosure of Invention

The utility model aims to overcome the defects and the shortcomings of the prior art and provide a normally open electromagnetic pilot valve which is simple in structural design, high in reliability and long in service life.

The technical scheme for realizing the aim of the utility model is as follows: the utility model provides a normally open type electromagnetism pilot valve, includes pilot valve base and bottom open-ended cavity stretch cover, the middle part on pilot valve base top is equipped with the screw hole, stretch the bottom of cover embedded in the screw hole, and rather than screw-thread fit, be equipped with movable core and quiet iron core in the stretch cover, movable core is located the middle part of stretch cover, and rather than sliding fit, movable core cup joints in the top of valve rod, quiet iron core is located the bottom of stretch cover, and rather than welded connection, the middle part of quiet iron core is equipped with annular groove, the bottom indent of stretch cover is formed with the first annular bead that corresponds with annular groove, in the annular groove was inlayed to first annular bead, the middle part of quiet iron core bottom is equipped with first slide hole, sliding connection has the valve clack subassembly in the first slide hole, the bottom of valve rod passes quiet iron core and is connected with the valve clack subassembly, valve rod and quiet iron core sliding fit, the diapire integrated into one piece of screw hole has the case that corresponds with the valve clack subassembly.

Further, the valve clack subassembly includes valve clack, sealing washer and sealing spring, the bottom middle part of valve clack is equipped with the second slide opening, sealing washer is embedded in the second slide opening, and rather than sliding fit, sealing spring's bottom and sealing washer butt, sealing spring's top and the roof butt of second slide opening, the bottom of valve clack is equipped with the spacing backstop piece to sealing washer.

Further, the bottom middle part of moving the iron core is equipped with first mounting hole, be equipped with the core spring in the first mounting hole, the core spring overcoat is in the valve rod, the roof of the top butt first mounting hole of core spring, the top surface of the bottom butt quiet iron core of core spring.

Further, the middle part of quiet iron core is equipped with the second mounting hole, be equipped with the return spring in the second mounting hole, the return spring overcoat is in the valve rod, the roof of return spring's top butt second mounting hole, the top surface of return spring's bottom butt valve clack subassembly.

Further, the spring force of the core spring is greater than the spring force of the return spring.

Further, a buffer block is further arranged in the stretching sleeve, the buffer block is located at the top of the stretching sleeve, a second annular convex edge for fixing the buffer block is formed in the top of the stretching sleeve in a concave mode, a buffer ball is arranged on the top surface of the valve rod, and a magnetism isolating ring is embedded in the top surface of the static iron core.

Further, a sealing ring is arranged between the top end of the pilot valve base and the bottom end of the stretching sleeve.

Further, the bottom of the pilot valve base is provided with an inlet channel and an outlet channel, the outlet channel is positioned in the middle of the pilot valve base and is communicated with the threaded hole through a valve port in the middle of the valve core, and the inlet channel is communicated with the threaded hole and is uniformly arranged in the circumferential direction of the outlet channel.

After the technical scheme is adopted, the utility model has the following positive effects:

(1) According to the electromagnetic pilot valve, the valve core and the pilot valve base are integrally designed, so that the situation that the valve core moves upwards or deviates due to large hydraulic pressure or air pressure in the valve is avoided, meanwhile, the static iron core is welded and connected with the stretching sleeve, the first annular convex edge is embedded into the annular groove, the firmness of connection between the static iron core and the stretching sleeve is further improved, the possibility that the static iron core moves due to high-frequency impact of the movable iron core is reduced, normal use of the electromagnetic pilot valve is guaranteed, the reliability is high, and the service life is long;

(2) According to the valve core, the sealing gasket and the sealing spring are arranged, so that the valve core is sealed, and meanwhile, the valve clack and the valve core are closed, so that the effects of buffering and noise reduction are achieved;

(3) According to the utility model, through the arrangement of the buffer blocks and the buffer balls, rigid impact between the movable iron core and the top wall of the stretching sleeve and the top surface of the static iron core in the up-and-down moving process is avoided, so that abrasion is avoided.

Drawings

In order that the utility model may be more readily and clearly understood, a further detailed description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings, in which:

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is an enlarged view of a portion a in fig. 1.

In the figure: 1. a pilot valve base; 1a, a threaded hole; 1b, an inlet channel; 1c, an outlet channel; 2. stretching the sleeve; 2a, a first annular rib; 2b, a second annular rib; 3. a movable iron core; 3a, a first mounting hole; 4. a stationary core; 4a, an annular groove; 4b, a first slide hole; 4c, a second mounting hole; 5. a valve stem; 6. a valve flap assembly; 6a, valve clacks; 6a1, a second slide hole; 6b, a sealing gasket; 6c, a sealing spring; 6d, a stop piece; 7. a valve core; 7a, valve port; 8. an iron core spring; 9. a return spring; 10. a buffer block; 11. a buffer ball; 12. a magnetism isolating ring; 13. a seal ring; 14. positioning the step.

Detailed Description

As shown in fig. 1 and 2, a normally open electromagnetic pilot valve comprises a pilot valve base 1 and a hollow stretching sleeve 2 with an opening at the bottom end, wherein the middle part of the top end of the pilot valve base 1 is provided with a threaded hole 1a, the bottom end of the stretching sleeve 2 is embedded in the threaded hole 1a and is in threaded fit with the threaded hole, a movable iron core 3 and a static iron core 4 are arranged in the stretching sleeve 2, the movable iron core 3 is positioned in the middle part of the stretching sleeve 2 and is in sliding fit with the stretching sleeve, the movable iron core 3 is sleeved on the top of a valve rod 5, the static iron core 4 is positioned at the bottom of the stretching sleeve 2 and is in welded connection with the stretching sleeve, the middle part of the static iron core 4 is provided with an annular groove 4a, the bottom of the stretching sleeve 2 is inwards concavely provided with a first annular convex rib 2a corresponding to the annular groove 4a, the first annular convex rib 2a is embedded in the annular groove 4a, the middle part of the bottom end of the static iron core 4 is provided with a first sliding hole 4b, the valve rod 5 is connected with the valve clack assembly 6 in a sliding manner through the static iron core 4 in the first sliding hole 4b, the valve rod 5 is in sliding fit with the static iron core 4 in the bottom end of the valve rod 5, the valve core 7 corresponding to the valve clack assembly 6 is integrally formed in the middle of the bottom wall of the threaded hole 1a, the situation that the valve core 7 moves upwards or deviates due to large hydraulic pressure or air pressure in the valve is avoided through the integrated design of the valve core 7 and the pilot valve base 1, meanwhile, the static iron core 4 is in welded connection with the stretching sleeve 2, the first annular convex edge 2a is embedded into the annular groove 4a, the connection firmness of the static iron core 4 and the stretching sleeve 2 is improved, the possibility that the static iron core 4 moves due to high-frequency impact of the movable iron core 3 is reduced, and therefore normal use of the electromagnetic pilot valve is guaranteed, the reliability is high, and the service life is long. In addition, the valve rod 5 passes through the static iron core 4 and is in sliding fit with the static iron core 4, so that the stability of up-and-down movement of the valve rod 5 is ensured, and the valve clack assembly 6 is prevented from shifting in the moving process. Specifically, the pilot valve base 1 and the stretching sleeve 2 are integrally formed, and a sealing ring 13 is arranged between the top end of the pilot valve base 1 and the bottom end of the stretching sleeve 2, so that the tightness of the electromagnetic pilot valve is ensured; the bottom of pilot valve base 1 is equipped with inlet channel 1b and outlet channel 1c, and outlet channel 1c is located the middle part of pilot valve base 1, and communicates with screw hole 1a through valve port 7a in the middle part of case 7, and inlet channel 1b and screw hole 1a intercommunication, and evenly arrange in outlet channel 1 c's circumference, so design for case 7 receives fluid or gas pressure more even, has further avoided case 7 because of the great circumstances that appears shifting of hydraulic pressure or atmospheric pressure in the valve. Of course, in order to further improve the connection firmness of the static iron core 4 and the stretching sleeve 2, the first annular rib 2a and the annular groove 4a are welded after the first annular rib 2a is embedded into the annular groove 4 a.

The valve clack subassembly 6 includes valve clack 6a, sealing washer 6b and sealing spring 6c, the bottom middle part of valve clack 6a is equipped with second slide hole 6a1, sealing washer 6b is embedded in second slide hole 6a1, and rather than sliding fit, sealing spring 6 c's bottom and sealing washer 6b butt, sealing spring 6 c's top and the roof butt of second slide hole 6a1, valve clack 6 a's bottom is equipped with the spacing backstop piece 6d to sealing washer 6b, through sealing washer 6b and sealing spring 6 c's setting, when sealed to valve core 7, the effect of buffering and making an uproar falls to valve clack 6a and the closure of valve core 7 has been played, the rigid striking of valve core 7 has been avoided to valve clack 6 a. Specifically, the valve flap 6a has a cylindrical shape, and the gasket 6b is made of an elastic material.

The bottom middle part of moving iron core 3 is equipped with first mounting hole 3a, be equipped with iron core spring 8 in the first mounting hole 3a, iron core spring 8 overcoat is in valve rod 5, the roof of the top butt first mounting hole 3a of iron core spring 8, the top surface of the bottom butt quiet iron core 4 of iron core spring 8, the middle part of quiet iron core 4 is equipped with second mounting hole 4c, second mounting hole 4c and first slide hole 4b intercommunication, be equipped with return spring 9 in the second mounting hole 4c, return spring 9 overcoat is in valve rod 5, the roof of the top butt second mounting hole 4c of return spring 9, the top surface of return spring 9 butt valve clack subassembly 6, with return spring 9 setting up in second mounting hole 4c, its mutual influence with the magnetic circuit has been avoided, thereby the actuation electromagnetic force of electromagnetism pilot valve has been improved, the stability of return spring 9 has been improved simultaneously. Specifically, the diameter of the first sliding hole 4a is larger than that of the second mounting hole 4c, so that a positioning step 14 is formed to limit the valve clack 6a, and the spring force of the iron core spring 8 is larger than that of the return spring 9.

Still be equipped with buffer block 10 in the tensile cover 2, buffer block 10 is located the top of tensile cover 2, and the top indent of tensile cover 2 is formed to have the second annular bead 2b of fixed buffer block 10, and buffer ball 11 is installed to the top surface of valve rod 5, and the top surface of quiet iron core 4 inlays and is equipped with separates magnetism circle 12, through buffer block 10 and buffer ball 11's setting, has avoided moving iron core 3 in-process and tensile cover 2's roof and the top surface of quiet iron core 4 to take place rigid impact up and down to avoid wearing and tearing, extension electromagnetic pilot valve's life. In addition, through the fixing of the second annular rib 2b to the buffer block 10, the use of mounting parts is reduced, and the cost is reduced. Specifically, the cushion block 10 and the cushion ball 11 are each made of an elastic material.

When an electromagnetic coil (not shown in the figure) is electrified, a magnetic field is formed, the movable iron core 3 is driven to move towards the static iron core 6, and then the valve rod 5 synchronously drives the valve clack assembly 6 to move downwards until the sealing gasket 6b is in sealing contact with the top surface of the valve core 7, so that the valve clack 6a and the valve core 7 are closed; when the electromagnetic coil is powered off, the iron core spring 8 drives the valve rod 5, the valve clack 6a and the sealing gasket 6b to move upwards together, the sealing gasket 6b is separated from the valve core 7, and the electromagnetic pilot valve is opened.

While the foregoing is directed to embodiments of the present utility model, other and further details of the utility model may be had by the present utility model, it should be understood that the foregoing description is merely illustrative of the present utility model and that no limitations are intended to the scope of the utility model, except insofar as modifications, equivalents, and improvements may be made within the spirit and principles of the utility model.

Claims

1. The utility model provides a normally open formula electromagnetism pilot valve, includes pilot valve base (1) and bottom open-ended cavity stretch cover (2), the middle part on pilot valve base (1) top is equipped with screw hole (1 a), the bottom of stretch cover (2) is embedded in screw hole (1 a), and rather than screw-thread fit, be equipped with in stretch cover (2) and move iron core (3) and quiet iron core (4), move iron core (3) and be located the middle part of stretch cover (2), and rather than sliding fit, move iron core (3) cup joint in the top of valve rod (5), its characterized in that: the static iron core (4) is located the bottom of stretching sleeve (2), and rather than welded connection, the middle part of static iron core (4) is equipped with annular groove (4 a), the bottom indent of stretching sleeve (2) is formed with first annular bead (2 a) that corresponds with annular groove (4 a), in annular groove (4 a) were embedded to first annular bead (2 a), the middle part of static iron core (4) bottom is equipped with first slide hole (4 b), sliding connection has valve clack subassembly (6) in first slide hole (4 b), the bottom of valve rod (5) passes static iron core (4) and is connected with valve clack subassembly (6), valve rod (5) and static iron core (4) sliding fit, the diapire middle part integrated into one piece of screw hole (1 a) has case (7) that corresponds with valve clack subassembly (6).

2. The normally-open solenoid pilot valve of claim 1, wherein: the valve clack assembly (6) comprises a valve clack (6 a), a sealing gasket (6 b) and a sealing spring (6 c), a second sliding hole (6 a 1) is formed in the middle of the bottom end of the valve clack (6 a), the sealing gasket (6 b) is embedded in the second sliding hole (6 a 1) and is in sliding fit with the second sliding hole, the bottom end of the sealing spring (6 c) is abutted to the sealing gasket (6 b), the top end of the sealing spring (6 c) is abutted to the top wall of the second sliding hole (6 a 1), and a stop piece (6 d) for limiting the sealing gasket (6 b) is arranged at the bottom end of the valve clack (6 a).

3. The normally-open solenoid pilot valve of claim 1, wherein: the novel valve is characterized in that a first mounting hole (3 a) is formed in the middle of the bottom end of the movable iron core (3), an iron core spring (8) is arranged in the first mounting hole (3 a), the iron core spring (8) is sleeved outside the valve rod (5), the top end of the iron core spring (8) is abutted to the top wall of the first mounting hole (3 a), and the bottom end of the iron core spring (8) is abutted to the top surface of the static iron core (4).

4. A normally open solenoid pilot valve as claimed in claim 3 wherein: the middle part of quiet iron core (4) is equipped with second mounting hole (4 c), be equipped with in second mounting hole (4 c) and reply spring (9), reply spring (9) overcoat is in valve rod (5), the roof of top butt second mounting hole (4 c) of reply spring (9), the top surface of the bottom butt valve clack subassembly (6) of reply spring (9).

5. The normally-open solenoid pilot valve of claim 4, wherein: the spring force of the iron core spring (8) is larger than the spring force of the return spring (9).

6. The normally open solenoid pilot valve of any one of claims 1 to 5, wherein: still be equipped with buffer block (10) in tensile cover (2), buffer block (10) are located the top of tensile cover (2), the top indent of tensile cover (2) forms second annular bead (2 b) that have fixed buffer block (10), buffer ball (11) are installed to the top surface of valve rod (5), the top surface of quiet iron core (4) is inlayed and is equipped with magnetism isolating ring (12).

7. The normally-open solenoid pilot valve of claim 6, wherein: a sealing ring (13) is arranged between the top end of the pilot valve base (1) and the bottom end of the stretching sleeve (2).

8. The normally-open solenoid pilot valve of claim 7, wherein: the bottom of pilot valve base (1) is equipped with inlet channel (1 b) and outlet channel (1 c), outlet channel (1 c) are located the middle part of pilot valve base (1), and communicate with screw hole (1 a) through valve port (7 a) at case (7) middle part, inlet channel (1 b) and screw hole (1 a) intercommunication, and evenly arrange around outlet channel (1 c).