CN219570948U

CN219570948U - Solenoid valve with combined sealing structure

Info

Publication number: CN219570948U
Application number: CN202320503319.0U
Authority: CN
Inventors: 杨丽媛; 杨富江; 杨风娟; 杨少凯; 马云
Original assignee: Wuzhong Instrument Intelligent Control Equipment Technology Co ltd
Current assignee: Wuzhong Instrument Intelligent Control Equipment Technology Co ltd
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2023-08-22
Anticipated expiration: 2033-03-15

Abstract

The utility model relates to an electromagnetic valve with a combined sealing structure, which comprises a valve body and a valve core movably arranged in the valve body, wherein a rear cover is fixedly arranged at the lower end of the valve body, a return spring is arranged between the bottom of the valve core and the rear cover, at least two upper and lower overlapped spacers are arranged on the valve core in a sealing way, the periphery of each spacer is in sealing fit with an inner hole of the valve body, the valve core is in sliding fit with the inner hole of each spacer, an annular boss is arranged on the upper end surface of each spacer, a sealing O-shaped ring is clamped between the outer ring wall of each annular boss and the inner wall of the valve body, a C-shaped ring and a positioning O-shaped ring are arranged in each annular boss, the inner ring of each C-shaped ring is clamped on the periphery of the valve core, and the positioning O-shaped ring is clamped between the outer ring of each C-shaped ring and the inner ring wall of each annular boss. According to the utility model, the C-shaped ring and the positioning O-shaped ring are arranged in the annular boss, and the sealing O-shaped ring is arranged between the outer circle of the annular boss and the inner wall of the valve body, so that dynamic and static combined sealing between the valve core and the valve body is realized, and the sealing effect between the valve core and the valve body and the service life of the electromagnetic valve are improved.

Description

Solenoid valve with combined sealing structure

Technical Field

The utility model relates to a solenoid valve with a combined sealing structure.

Background

The general sealing structure type of the electromagnetic valve is as follows: the O-shaped ring is assembled after the groove is processed on the outer peripheral surface of the valve core and is contacted with the inner hole wall of the valve body to form dynamic seal, and the coaxiality of the middle through hole and the roughness of the joint of the runner holes are difficult to ensure during processing, so that the O-shaped ring is easily cut off by the joint of the runner holes during the movement of the valve rod in the use process to cause sealing failure, thereby influencing the normal use of the electromagnetic valve.

Disclosure of Invention

The utility model aims to solve the technical problems that: in order to overcome the defects in the prior art, the utility model provides the electromagnetic valve with the combined sealing structure, so that the sealing effect of the electromagnetic valve is effectively improved, the assembly efficiency is improved, and the cost is reduced.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a solenoid valve with combined type seal structure, includes the valve body, removes the case of establishing in the valve body, and the valve body lower extreme fixedly connected with back lid, case bottom and back lid between install reset spring, the case on sealing installation have at least two superimposed spacer about, spacer periphery and the sealed cooperation of valve body hole, case and spacer hole sliding fit, spacer up end have annular boss, the card is equipped with sealed O type circle between annular boss outer lane wall and the valve body inner wall, be equipped with C shape circle and location O shape circle in the annular boss, C shape circle inner circle clamp in case periphery, location O shape circle card is established between C shape circle outer lane and annular boss inner circle wall.

Preferably, four upper and lower overlapped spacers are arranged on the periphery of the valve core in a sealing manner from top to bottom, an upper check ring capable of being pressed on the annular boss is arranged above the uppermost spacer, and a lower check ring pressed on the lower end face of the spacer is arranged on the bottom face of the lowermost spacer.

Specifically, lower retaining ring up end have outer boss and interior boss, be equipped with C shape circle and location O shape circle between outer boss inner wall and the interior boss, the C shape circle location is installed in interior boss periphery, location O shape circle clamping is between interior boss periphery and outer boss inner circle wall, the sealing O shape circle is clamped between outer boss outer circle wall and the valve body inner wall.

Further, the inner bottom surface of the annular boss is provided with an upper boss for positioning the inner ring of the lower end surface of the C-shaped ring, and the lower end surface of the spacer bush is provided with a lower boss for positioning the inner ring of the upper end surface of the C-shaped ring.

Further, a positioning ring pressed on the upper retainer ring is arranged above the upper retainer ring.

The beneficial effects of the utility model are as follows: according to the utility model, the C-shaped ring and the positioning O-shaped ring are arranged in the annular boss of the spacer bush so as to control dynamic sealing between the valve core and the C-shaped ring, and the sealing O-shaped ring is arranged between the outer circle of the annular boss and the inner wall of the valve body, so that static sealing between the sealing O-shaped ring and the inner wall of the valve body is realized, and the combined sealing structure improves the sealing effect between the valve core and the valve body and the service life of the electromagnetic valve.

Drawings

The utility model will be further described with reference to the drawings and embodiments.

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is an enlarged schematic view of the structure at a in fig. 1.

In the figure: 1. valve body, 2, pilot seat, 3, valve core, 4, pilot piston, 5, rear cover, 6, return spring, 7, spacer bush, 7-1, annular boss, 7-2, upper boss, 7-3, lower boss, 8, sealing O-ring, 9.C, 10, positioning O-ring, 11, upper retainer ring, 12, positioning ring, 13, lower retainer ring, 13-1, outer boss, 13-2, inner boss.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

The electromagnetic valve with the combined sealing structure comprises a valve body 1 and a pilot seat 2 connected with the upper end of the valve body 1, wherein a valve core 3 is arranged in the valve body 1 in a sliding mode, and a pilot piston 4 pushing the valve core 3 to move is arranged in the pilot seat 2.

The lower end face of the valve body 1 is fixedly connected with a rear cover 5 in a sealing manner, a guide hole is formed in the center of the rear cover 5, the bottom end of the valve core 3 can slide in the guide hole, a blind hole is formed in the center of the bottom of the valve core 3, and a reset spring 6 is arranged between the inner bottom face of the blind hole and the inner bottom face of the guide hole of the rear cover 5.

Four spacer bushes 7 which are sequentially overlapped up and down are hermetically arranged on the periphery of the valve core 3 from top to bottom, the periphery of the spacer bushes 7 is hermetically matched with the inner hole of the valve body 1, and the valve core 3 is slidably matched with the inner hole of the spacer bushes 7. The upper end face of the spacer 7 is provided with an annular boss 7-1, the inner bottom surface of the annular boss 7-1 is provided with an upper boss 7-2 with the diameter consistent with the diameter of the inner hole of the spacer 7, the lower end face of the spacer 7 is provided with a lower boss 7-3 with the diameter consistent with the diameter of the inner hole of the spacer 7, a sealing O-shaped ring 8 is clamped between the outer ring wall of the annular boss 7-1 and the inner wall of the valve body 1, a C-shaped ring 9 and a positioning O-shaped ring 10 are arranged in the annular boss 7-1, wherein the inner ring of the C-shaped ring 9 is positioned and clamped on the periphery of the valve core 3 through the upper boss 7-2, and the positioning O-shaped ring 10 is clamped between the outer ring of the C-shaped ring 9 and the inner ring wall of the annular boss 7-1; and the lower boss 7-3 of the lower end face of the spacer 7 is matched with the upper boss 7-2 of the upper end face of the next spacer 7 to position the inner ring of the upper end face of the C-shaped ring 9.

An upper check ring 11 which can be tightly pressed on the annular boss 7-1 is arranged above the uppermost spacer 7, the upper end of the valve core 3 is in clearance fit with the inner hole of the upper check ring 11, and a positioning ring 12 which is tightly pressed on the upper check ring 11 is arranged above the upper check ring 11.

The bottom surface of the spacer 7 at the lowest end is provided with a lower retainer ring 13 which is pressed against the lower end surface of the spacer 7, the upper end surface of the lower retainer ring 13 is provided with an outer boss 13-1 and an inner boss 13-2 for matching with the spacer 7 at the lowest end, the outer boss 13-1 corresponds to the annular boss 7-1 on the spacer 7, the inner boss 13-2 corresponds to the upper boss 7-2 and the lower boss 7-3 on the spacer 7, the same C-shaped ring 9, the same positioning O-shaped ring 10 and the same sealing O-shaped ring 8 as those arranged on the spacer 7 are arranged between the inner wall of the outer boss 13-1 and the inner boss 13-2, the C-shaped ring 9 is positioned and arranged on the periphery of the inner boss 13-2, the positioning O-shaped ring 10 is clamped between the periphery of the inner boss 13-2 and the inner wall of the outer boss 13-1, and the sealing O-shaped ring 8 is clamped between the outer wall of the outer boss 13-1 and the inner wall of the valve body 1.

During assembly, after the C-shaped rings 9, the positioning O-shaped rings 10 and the sealing O-shaped rings 8 are respectively arranged on the four spacer rings 7 and the lower retainer ring 13, the four spacer rings 7 are sequentially overlapped up and down, the upper end face of the spacer ring 7 with the sealing O-shaped rings 8 is connected with the lower end face of the last spacer ring 7, then the valve core 3 passes through the inner hole of the lowermost spacer ring 7 to the uppermost spacer ring 7, wherein the small hole of the valve core 3 faces upwards so as to be connected with the pilot piston 4 in the pilot seat 2, the valve core 3 and the spacer ring 7 are assembled and then are arranged in the valve body 1, the reset spring 6 is arranged in a blind hole at the lower end of the valve core 3, and the rear cover 5 is fixed with the valve body 1 through a hexagon bolt.

When the upper part of the pilot piston 4 is forced to push, the valve core 3 is pushed to move downwards, and when the upper part of the pilot piston 4 is forced to disappear, the return spring 6 pushes the valve core 3 to move upwards to return.

According to the electromagnetic valve, the C-shaped ring 9 and the positioning O-shaped ring 10 are arranged in the annular boss 7-1 of the spacer bush 7, dynamic sealing between the valve core 3 and the C-shaped ring 9 can be controlled, the sealing O-shaped ring 8 is arranged between the outer circle of the annular boss 7-1 and the inner wall of the valve body 1, static sealing between the sealing O-shaped ring 8 and the inner wall of the valve body 1 is achieved, and the combined sealing structure is beneficial to better improving the sealing effect between the valve core 3 and the valve body 1 and prolonging the service life of the electromagnetic valve.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims

1. The utility model provides a solenoid valve with combined type seal structure, includes the valve body, removes the case of establishing in the valve body, and the valve body lower extreme fixedly connected with back lid, case bottom and back lid between install reset spring, characterized by: the valve core is provided with at least two upper and lower overlapped spacers in a sealing way, the periphery of the spacer is in sealing fit with an inner hole of the valve body, the valve core is in sliding fit with the inner hole of the spacer, the upper end face of the spacer is provided with an annular boss, a sealing O-shaped ring is clamped between the outer ring wall of the annular boss and the inner wall of the valve body, a C-shaped ring and a positioning O-shaped ring are arranged in the annular boss, the inner ring of the C-shaped ring is clamped on the periphery of the valve core, and the positioning O-shaped ring is clamped between the outer ring of the C-shaped ring and the inner ring wall of the annular boss.

2. The solenoid valve with a combined sealing structure as set forth in claim 1, wherein: four upper and lower overlapped spacers are arranged on the periphery of the valve core in a sealing manner from top to bottom, an upper check ring capable of being pressed on the annular boss is arranged above the uppermost spacer, and a lower check ring which is pressed on the lower end face of the spacer is arranged on the bottom surface of the lowermost spacer.

3. The solenoid valve with a combined sealing structure as set forth in claim 2, wherein: the lower check ring upper end face have outer boss and interior boss, be equipped with C shape circle and location O shape circle between outer boss inner wall and the interior boss, the C shape circle location is installed in boss periphery, location O shape circle clamping is in between boss periphery and the outer boss inner circle wall, the sealing O shape circle is clamped to the outer boss outer lane wall and the valve body inner wall between.

4. A solenoid valve with a combination seal as set forth in claim 3 wherein: the inner bottom surface of the annular boss is provided with an upper boss for positioning the inner ring of the lower end surface of the C-shaped ring, and the lower end surface of the spacer bush is provided with a lower boss for positioning the inner ring of the upper end surface of the C-shaped ring.

5. A solenoid valve with a combination seal as set forth in claim 3 wherein: and a positioning ring pressed on the upper retainer ring is arranged above the upper retainer ring.