CN212718017U

CN212718017U - Electromagnetic valve

Info

Publication number: CN212718017U
Application number: CN202021596362.9U
Authority: CN
Inventors: 舒虎刚; 郭国武
Original assignee: Longquan Huifeng Import And Export Co ltd
Current assignee: Longquan Huifeng Import And Export Co ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-03-16
Anticipated expiration: 2030-08-04

Abstract

The utility model provides a solenoid valve, including the valve body and install disk seat subassembly, first disk seat and the coil assembly on the valve body, be equipped with inlet channel, liquid outlet channel on the valve body and with the valve pocket of inlet channel intercommunication, disk seat subassembly and first disk seat fixed connection, coil assembly and disk seat subassembly fixed connection, the coil assembly is including the wiring mouth, first disk seat have with the spacing straight flute of pin cooperation, first disk seat with the valve body passes through pin fixed connection, the wiring mouth passes through relative position is confirmed to the straight flute, satisfies the requirement of whole delivery behind customer's disk seat subassembly and the first disk seat fixed connection.

Description

Electromagnetic valve

Technical Field

The utility model relates to a fluid control field, concretely relates to solenoid valve in air conditioner technical field.

Background

In the field of automobiles, electromagnetic valves are refrigerant control switches in automobile air conditioning systems. The solenoid valve comprises a coil assembly, a valve body and a valve seat assembly, wherein the coil assembly comprises a positioning boss, and the coil assembly and the main valve body are relatively positioned through the positioning boss. The utility model discloses CN209294525U utility model provides a normally open solenoid valve, including the main valve body and install first valve seat subassembly, first valve seat subassembly and the coil assembly on the valve body, first valve seat subassembly and the main valve body pass through screw thread fixed connection, and second valve seat subassembly and first valve seat subassembly also pass through screw thread fixed connection, and the coil assembly is fixed in second valve seat subassembly periphery. However, because the first valve seat component is fixedly connected with the main valve body through the threads, the screwing positions of the threads cannot be unified, and therefore the relative positions of the coil assembly wiring port and the valve body are solved by adding a separate positioning ring, and the structure is complex. cn210715967U utility model application provides a normally closed solenoid valve, leads to the relative position of unable definite coil assembly wiring mouth, can't satisfy system manufacturer's requirement.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a solenoid valve solves the relative position of coil assembly wiring mouth and confirms the problem.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a solenoid valve comprises a valve body, a coil assembly, a valve seat assembly, a main valve core and a first valve seat, wherein the valve seat assembly comprises a valve seat, a movable iron core and a static iron core; the solenoid valve is also provided with a back pressure cavity, the back pressure cavity is positioned on one side of the main valve core close to the first valve seat, the first valve seat is fixedly connected with the valve seat assembly, the first valve seat is also provided with a control valve port, and the coil assembly is powered on or powered off to enable the movable iron core to open or close the control valve port, so that the back pressure cavity is communicated with or closed off the second channel; the method is characterized in that: the coil assembly comprises a wiring port, the first valve seat is provided with a straight groove matched and limited with the stop lever, the first valve seat is fixedly connected with the valve body through the stop lever, and the wiring port is used for determining the relative position through the straight groove.

Further, the coil assembly comprises a positioning boss, the end face of the first valve seat is provided with a corresponding concave portion, the positioning boss is inserted into the concave portion, and the coil assembly cannot rotate relative to the first valve seat.

Further, the coil assembly includes magnetic conduction frame, coil skeleton, coil and plastic envelope layer, and the magnetic conduction frame is fixed outside the plastic envelope layer, the location boss is formed by the punching press of magnetic conduction frame.

Further, the coil assembly comprises a coil assembly and a positioning boss, wherein the coil assembly comprises a magnetic conduction frame, a coil framework and a coil, the coil is wrapped by a plastic package layer, and the positioning boss is formed by the plastic package layer.

Further, the main valve core is arranged in a cavity at the bottom of the first valve seat or a valve cavity of the valve body, and the coil assembly drives the movable iron core to move so as to control the main valve core to open or close the main valve port.

Further, the valve seat assembly further comprises a pilot valve core, and the movable iron core can open or close the control valve port through the pilot valve core when the coil assembly is powered on or powered off.

Further, the stop lever is a pin or a screw.

Further, the central line of the first valve seat is perpendicular to the central line of the straight groove.

Further, the valve body has a through hole or screw hole that fits a pin or screw.

The beneficial effects of the utility model, disk seat subassembly and first disk seat fixed connection, coil assembly and disk seat subassembly fixed connection, because of, first disk seat have with the spacing straight flute of pin cooperation, first disk seat passes through pin fixed connection with the valve body, and coil assembly wiring mouth passes through the straight flute and confirms relative position, satisfies the requirement of whole delivery behind customer's coil assembly, disk seat subassembly and the first disk seat fixed connection.

Drawings

FIG. 1 is a schematic view of a solenoid valve.

Fig. 2 is an exploded perspective view of the solenoid valve.

Detailed Description

In order to make those skilled in the art understand the technical solution of the present invention better, the following detailed description is made with reference to the accompanying drawings and specific examples, and the terms of upper and lower directions in the description are set forth according to the corresponding directions of the drawings. It is not overrepresented here, as is clearly described in the cited background document.

Referring to fig. 1 and 2, the solenoid valve includes a valve body 1, a valve seat assembly 10, a coil assembly 20, a main valve element 2, and a first valve seat 3, the valve seat assembly 10 includes a valve seat 11, a movable iron core 12, a stationary iron core 15, and a pilot valve element 16, the valve body 1 is formed with a first passage 101, a second passage 102, a valve cavity 104, and a main valve port 103, and the main valve element 2 cooperates with the main valve port 103 to enable the first passage 101 and the second passage 102 to communicate or block. The solenoid valve further comprises a first back pressure cavity 4, the first back pressure cavity 4 is located on one side, close to the pilot valve core 16, of the main valve core 2, the second back pressure cavity 5 is located between the movable iron core 12 and the pilot valve core 16, the first back pressure cavity 4 is communicated with the second back pressure cavity 5, a throttling opening 161 is formed in the pilot valve core 16, and the movable iron core 12 is matched with the throttling opening 161 and the pilot valve core 16 is matched with the first valve seat 3 to enable the first back pressure cavity 4 to be communicated with or cut off from the first channel 101. Energizing or de-energizing the coil assembly 20 allows the plunger 12 to open or close the orifice 161. The solenoid valve in this embodiment is a normally closed solenoid valve, after the solenoid valve is powered on, the movable iron core 12 moves away from the pilot valve core 16, so that the choke 161 is opened, the pilot valve core 16 moves upward to open the control valve port 302, and further the first back pressure chamber 4 communicates with the first channel 101, the pressure of the first back pressure chamber 4 is reduced, when the pressure on the side of the first back pressure chamber 4 is smaller than the pressure on the side of the second channel 102, the main valve core 2 moves upward to open the main valve port 103, and the first channel 101 communicates with the second channel 102, and vice versa when the power is off. Of course, the solenoid valve may also be a normally open type solenoid valve, that is, when the solenoid valve is not energized, the choke 161 is opened, the first passage 101 and the second passage 102 are communicated, and after the solenoid valve is energized, the pilot valve core 16 moves downward, the main valve core 2 moves downward, and the first passage 101 and the second passage 102 are closed. In this embodiment, main valve element 2 is in valve cavity 104 of valve body 1, and coil assembly 20 controls main valve element 2 to open or close main valve port 103 by driving movable iron core 12 to move; of course, main valve element 2 may also be a cavity at the bottom of the first valve seat. The above scheme can refer to two background art documents.

The valve seat assembly 10 comprises a valve seat 11, a movable iron core 12, a reset spring 13, a sleeve 14, a static iron core 15, a pilot valve core 16, an auxiliary spring 17 and a baffle ring 18, the reset spring 13 is sleeved on the movable iron core 12, the top end of the reset spring 13 is abutted to the bottom wall of the static iron core 15, under the supporting action of the reset spring 13, a movable gap exists between the bottom ends of the movable iron core 12 and the static iron core 15, the bottom parts of the valve seat 11 and the sleeve 14 are welded and fixed, the top parts of the static iron core 15 and the sleeve 14 are welded and fixed, the baffle ring 18 is fixed at the lower end of the valve seat 11 and used for limiting the auxiliary spring 17, the pilot valve core 16 is provided with a throttling opening 161, and the movable iron core 12 opens or closes. In this embodiment, each part of the valve seat assembly forms a whole after being assembled, so that the production turnover management is convenient, and the scheme in the background technology can be adopted. In this embodiment, the valve seat assembly includes a pilot valve element, and the movable core can directly open or close the control valve port without using the pilot valve element.

The first valve seat 3 comprises an inner cavity 301, at least part of the valve seat 11 is positioned in the inner cavity 301, and the valve seat 11 is fixedly connected with the first valve seat 3 through threads; the first valve seat 3 is at least partially matched with the valve cavity 104, the first valve seat 3 is provided with a straight groove 303 matched with the stop lever for limiting, the valve body 1 is provided with a corresponding threaded hole, and the first valve seat 3 is fixedly connected with the valve body 1 through a screw 7; of course, the valve body may adopt a through hole, and the first valve seat 3 is fixedly connected with the valve body 1 through a pin. In this embodiment, the center line of the first valve seat 3 is perpendicular to the center line of the straight groove, which is convenient for production and processing. The inner cavity 301 is communicated with the valve cavity 104, the pilot valve core 16 divides the inner cavity 301 to form a second back pressure cavity 5, the main valve core 2 divides the valve cavity 104 to form a first back pressure cavity 4, the control valve port 302 is communicated with the inner cavity 301 and the second channel 102, and the main valve port 103 is communicated with the valve cavity 104 and the second channel 102. The valve seat 11 has a step 111, and the relative position of the valve seat 11 and the first valve seat 3 is defined by the step 111, so that the stroke of the pilot valve core is accurately controlled. First valve seat 3 has a step 304, and the step 304 defines the relative position of first valve seat 3 and valve body 1, and accurately controls the stroke of main spool 2, and in this example, further includes a spring 6, which assists main spool 2 in moving.

Coil assembly 20 includes magnetic frame 21, coil skeleton 22, coil 23 and plastic envelope layer 24, and above part including magnetic frame 21 is including being enveloped by plastic envelope layer 24, and plastic envelope layer 24 sets up wiring mouth 25, and the bottom of plastic envelope layer 25 extends out and fixes a position boss 251, and first valve seat 3 has the terminal surface and has corresponding concave part 305, fix a position boss 251 and insert in the concave part 305, coil assembly 20 can not rotate relatively first valve seat 3. Of course, the background technology can also be adopted, the magnetic conduction frame is fixed outside the plastic package layer, the positioning boss is formed by punching the magnetic conduction frame, the magnetic conduction frame is generally U-shaped, and the positioning boss is punched at the bottom. When the coil assembly is processed, the concave part of the end face of the first valve seat is positioned through the straight groove matched and limited with the stop lever, and the coil assembly is positioned through the positioning boss, so that the wiring port is positioned through the straight groove matched and limited with the stop lever. The sealing rings are arranged at two ends of the coil assembly and are fixedly connected with the valve seat assembly through screws, and the clamping rings in the background technology can also be fixedly connected with the valve seat assembly.

It should be noted that: the above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and the expressions such as upper, lower, inner, outer, etc. appearing herein are only for the purpose of more clearly illustrating the technical solutions of the present invention, but not for limiting the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, it will be understood by those skilled in the art that the present invention may be modified and replaced by other embodiments without departing from the spirit and scope of the present invention.

Claims

1. The electromagnetic valve comprises a valve body, a coil assembly, a valve seat assembly, a main valve core and a first valve seat, wherein the valve seat assembly comprises a valve seat, a movable iron core and a static iron core, the valve body is provided with a first channel, a second channel and a main valve port, and the main valve core is matched with the main valve port to enable the first channel and the second channel to be communicated or cut off; the solenoid valve is also provided with a first back pressure cavity, the first back pressure cavity is positioned on one side of the main valve core close to the first valve seat, the first valve seat is fixedly connected with the valve seat assembly, the first valve seat is also provided with a control valve port, and the coil assembly is powered on or powered off to enable the movable iron core to open or close the control valve port, so that the first back pressure cavity is communicated with or cut off from the second channel; the method is characterized in that: the coil assembly comprises a wiring port, the first valve seat is provided with a straight groove matched and limited with the stop lever, the first valve seat is fixedly connected with the valve body through the stop lever, and the wiring port is used for determining the relative position through the straight groove.

2. The solenoid valve according to claim 1, wherein: the coil assembly comprises a positioning boss, the end face of the first valve seat is provided with a corresponding concave part, the positioning boss is inserted into the concave part, and the coil assembly cannot rotate relative to the first valve seat.

3. The solenoid valve according to claim 2, wherein: the coil assembly comprises a coil assembly and a positioning boss, wherein the coil assembly comprises a magnetic conduction frame, a coil framework, a coil and a plastic package layer, the magnetic conduction frame is fixed outside the plastic package layer, and the positioning boss is formed by punching the magnetic conduction frame.

4. The solenoid valve according to claim 2, wherein: the coil assembly comprises a magnetic conduction frame, a coil framework and a coil, which are all coated by a plastic package layer, and the positioning boss is formed by the plastic package layer.

5. The solenoid valve according to claim 1, wherein: the main valve core is arranged in a cavity at the bottom of the first valve seat or a valve cavity of the valve body, and the coil assembly drives the movable iron core to move so as to control the main valve core to open or close the main valve port.

6. The solenoid valve according to claim 1, wherein: the valve seat assembly further comprises a pilot valve core, and the movable iron core can open or close the control valve port through the pilot valve core when the coil assembly is powered on or powered off.

7. The solenoid valve according to claim 1, wherein: the stop lever is a pin or a screw.

8. The electromagnetic valve according to claim 1 or 7, characterized in that: the central line of the first valve seat is perpendicular to the central line of the straight groove.

9. The solenoid valve according to claim 7, wherein: the valve body has a through hole or screw hole for receiving a pin or screw.