Anti-scour-off press-fitting type filter screen structure

Abstract

The utility model discloses an anti-scour-off press-fitting type filter screen structure which comprises a filter screen framework of a cylindrical structure, an installation sinking groove is formed in the front end face of the filter screen framework, a Z-shaped filter screen is installed in the installation sinking groove, a gasket is further installed on the inner side of the filter screen in a press-fitting mode, and external threads are arranged on the outer wall of the filter screen framework. According to the utility model, the filter screen is pressed and fixed on the filter screen framework through the gasket, when the filter screen is damaged or needs to be cleaned, the filter screen framework is taken out, and the filter screen can be replaced or cleaned by pulling out the gasket, so that the maintenance cost is lower, and the cleaning is more convenient. After the filter screen is arranged at the inlet of the electromagnetic valve, the Z-shaped top end face of the filter screen abuts against the step face at the inlet of the electromagnetic valve, the interior of the filter screen is pressed and fixed by the gasket, and the back of the filter screen is doubly fixed and locked through the filter screen framework and the locking sleeve, so that the filter screen is prevented from being deformed under the long-term washing action of high-pressure fluid, and the service life of the filter screen is prolonged. Even if the filter screen is used for a long time, the filter screen does not fall off.

Description

Technical Field

[0001] The utility model relates to an anti-slip press-fit filter screen structure, belonging to the technical field of electromagnetic valve structures. Background Art

[0002] Solenoid valve is an industrial device controlled by electromagnetics. It is a basic component for controlling fluid automation. It is an actuator and is not limited to hydraulic or pneumatic. If there is no filtration at the inlet of the solenoid valve, when a large volume of debris contained in the fluid flows into the valve, it is very easy to cause the valve to be blocked, affecting the use of the valve or even damaging the valve.

[0003] Therefore, almost all existing solenoid valve structures are equipped with a filter screen, which is set in a quick-install adapter. The quick-install adapter of the solenoid valve includes a pipe body, a filter screen is arranged transversely inside the pipe body, a connecting thread is arranged outside the pipe body, and a quick-install structure adapted to the water inlet of the solenoid valve is arranged at the downstream end of the pipe body. The method of using an adapter plus a filter screen facilitates the disassembly, cleaning, and replacement of the filter screen.

[0004] However, the filter, filter side wall and tube body in the solenoid valve quick-release adapter are integrally injection molded. When the filter is damaged, the entire solenoid valve quick-release adapter needs to be replaced, and the subsequent repair and maintenance costs are high. At the same time, since the filter is deep into the middle of the tube body and cannot be removed, it is not convenient to clean the filter. In addition, when the fluid pressure in the solenoid valve is relatively large, the filter will be deformed under the long-term scouring action of the high-pressure fluid, resulting in looseness at the connection between the filter and the tube body. After a long time, the filter will fall off the tube body and enter the flow channel under the scouring action of the fluid, resulting in filtration failure and flow channel blockage. Summary of the invention

[0005] The purpose of the utility model is to provide a press-fit filter structure that prevents the filter from falling off. In this structure, when the filter is damaged, it only needs to be replaced separately; it is also convenient to remove the filter for cleaning; at the same time, the structure has an anti-falling effect, is reliable to use, and the filter will not fall off into the flow channel.

[0006] The technical solution of the utility model is: a kind of anti-dislodgement press-fit filter structure, including a filter frame of a cylindrical structure, a mounting groove is provided on the front end face of the filter frame, a Z-shaped filter is installed in the mounting groove, the bottom surface of the filter is fitted with the step surface of the mounting groove, its side wall is fitted with the inner wall of the mounting groove, and its top bottom surface is supported on the end face of the mounting groove, a gasket is also press-fitted on the inner side of the filter, and an external thread is provided on the outer wall of the filter frame.

[0007] In the aforementioned anti-slip press-fit filter structure, the rear end face of the filter frame is provided with a fixed countersunk hole, in which a locking sleeve is installed. The locking sleeve is a T-shaped structure, and the length of its small diameter section is equal to the depth of the fixed countersunk hole. An external thread is provided on the outer wall of the locking sleeve.

[0008] In the aforementioned anti-slip press-fit filter structure, a plurality of installation notches are provided on the rear end surfaces of the filter frame and the locking sleeve.

[0009] In the aforementioned anti-slip press-fit filter screen structure, the thickness of the gasket is smaller than the height of the vertical section of the filter screen.

[0010] The beneficial effects of the utility model are as follows: compared with the prior art, the filter of the utility model is installed into the filter frame, and then the filter is pressed and fixed on the filter frame by the gasket. When the filter is damaged or needs to be cleaned, the filter frame is taken out, and the gasket is pulled out to replace or clean the filter. The repair and maintenance costs are relatively low, and the cleaning is also relatively convenient. After the filter of the utility model is installed at the inlet of the solenoid valve, its Z-shaped top surface is against the step surface at the inlet of the solenoid valve, and the inside of the filter is pressed and fixed by the gasket, and its back is double fixed and locked by the filter frame and the locking sleeve, thereby avoiding the deformation of the filter under the long-term scouring of the high-pressure fluid. Even after long-term use, the filter will not fall off, effectively avoiding the filter from entering the flow channel under the scouring of the fluid, thereby causing filtration failure and flow channel blockage.

[0011] In summary, the structure of the utility model has the advantages of simple assembly, easy replacement and maintenance, anti-slip, reliable use, and will not fall off into the flow channel, thereby causing filtration failure and flow channel blockage. It has good promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the utility model installed in a solenoid valve;

[0014] Figure 3 The schematic diagram of the structure of the filter screen being installed into the filter screen frame at position A;

[0015] Figure 4 It is a structural schematic diagram of the filter skeleton;

[0016] Figure 5 for Figure 4 Schematic diagram of the top view structure.

[0017] Figure numerals: 1-filter frame, 2-filter, 3-gasket, 4-locking sleeve, 5-installation notch. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0019] An embodiment of the utility model: a press-fit filter structure to prevent disengagement, comprising a filter skeleton 1 of a cylindrical structure, the front end face of the filter skeleton 1 is provided with a mounting groove, a Z-shaped filter 2 is loaded in the mounting groove, the bottom surface of the filter 2 is fitted with the step surface of the mounting groove, its side wall is fitted with the inner wall of the mounting groove, and its top bottom surface is supported on the end face of the mounting groove, a gasket 3 is also press-fitted on the inner side of the filter 2, and the outer wall of the filter skeleton 1 is provided with an external thread.

[0020] The filter structure of the utility model is used at the inlet of the solenoid valve, and the working medium is input from the inlet and flows out from the outlet after passing through the filter 2. The filter structure includes a filter frame 1, a filter 2 and a gasket 3. The gasket 3 presses and fixes the filter 2 on the filter frame 1, and then installs it to the inlet of the solenoid valve. After being installed to the bottom, the front end surface of the filter 2 abuts against the step surface at the inlet of the solenoid valve, and the inside of the filter 2 is pressed and fixed by the gasket 3, and its back is fixed and locked by the filter frame 1. The filter 2 is locked and fixed by this structure, and at the same time, the structure is also convenient for the removal and installation of the filter 2, and is convenient for maintenance, replacement and cleaning.

[0021] The rear end face of the filter skeleton 1 is provided with a fixed countersunk hole, in which a locking sleeve 4 is installed. The locking sleeve 4 is a T-shaped structure, and the length of its small diameter section is equal to the depth of the fixed countersunk hole. The outer wall of the locking sleeve 4 is provided with an external thread. During use, after the filter skeleton 1 is installed in place, the locking sleeve 4 is screwed into the inlet of the solenoid valve so that its small diameter section extends into the fixed countersunk hole of the filter skeleton 1. After the locking sleeve 4 is installed in place, the head end of its small diameter section just abuts against the step surface of the fixed countersunk hole, and the step surface at the connection between the large diameter section and the small diameter section of the locking sleeve 4 just presses on the rear end face of the filter skeleton 1, thereby firmly locking and fixing the filter skeleton 1. Through the double locking action of the filter skeleton 1 and the locking sleeve 4, loosening of the filter structure is avoided.

[0022] The rear end surfaces of the filter frame 1 and the locking sleeve 4 are both provided with a plurality of installation notches 5. By inserting a tool into the safety notches 5, the filter frame 1 or the locking sleeve 4 can be driven to rotate, thereby facilitating the installation and removal of the filter frame 1 or the locking sleeve 4.

[0023] The thickness of the gasket 3 is slightly smaller than the height of the vertical section of the filter screen 2, that is, after the gasket 3 is installed in the filter screen 2 and contacts with its bottom surface, the front end surface of the gasket 3 is lower than the front end surface of the filter screen 2. The gasket 3 mainly presses and fixes the filter screen 2 on the filter screen frame 1 through lateral extrusion force, and in the axial direction of the solenoid valve, the front end surface of the filter screen 2 is pressed against the step surface at the inlet of the solenoid valve, and the back is pressed and fixed by the filter screen frame 1 and the locking sleeve 4 to achieve axial fixation of the filter screen 2, thereby firmly locking and fixing the filter screen 2.

Claims

1. An anti-collision press-fit filter structure, characterized in that: The invention comprises a filter frame (1) of a cylindrical structure, wherein a mounting groove is provided on the front end surface of the filter frame (1), a Z-shaped filter (2) is installed in the mounting groove, the bottom surface of the filter (2) is in contact with the step surface of the mounting groove, the side wall is in contact with the inner wall of the mounting groove, the top bottom surface is supported on the end surface of the mounting groove, a gasket (3) is also pressed on the inner side of the filter (2), and the outer wall of the filter frame (1) is provided with an external thread.

2. The anti-collision press-fit filter structure according to claim 1 is characterized in that: The rear end face of the filter frame (1) is provided with a fixed countersunk hole, in which a locking sleeve (4) is installed. The locking sleeve (4) is a T-shaped structure, the length of its small diameter section is equal to the depth of the fixed countersunk hole, and an external thread is provided on the outer wall of the locking sleeve (4).

3. The anti-collision press-fit filter structure according to claim 2 is characterized in that: A plurality of mounting notches (5) are provided on the rear end surfaces of the filter frame (1) and the locking sleeve (4).

4. The anti-collision press-fit filter structure according to claim 1 is characterized in that: The thickness of the gasket (3) is smaller than the height of the vertical section of the filter screen (2).

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