Filter

Abstract

The utility model discloses a filter which comprises a main body and a filter component detachably connected with the main body, a cavity is axially formed in the main body from top to bottom, the lower part of the filtering assembly is positioned in the cavity, and a circumferential gap and a feeding gap are formed in the cavity; a feeding hole communicated with the feeding gap, a discharging hole communicated with the circumferential gap, a pressure regulating hole and a pressure relief hole are formed in the main body. Compared with the prior art, the filter has the advantages that when pressure relief is needed in the use process of the filter, the pressure relief valve is mounted on the pressure relief hole, a fluid medium flows into the backflow hole through the pressure relief hole by adjusting the pressure relief valve, so that pressure relief is carried out, the backflow medium is filtered by the annular filter screen, impurities are effectively prevented from blocking the pressure relief hole and the backflow hole, and the pressure relief hole and the backflow hole are effectively prevented from being blocked. Therefore, the pressure relief process is normally carried out, and normal use of equipment is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering, in particular to a filter. Background Art

[0002] A sprayer is a device that uses spraying technology to atomize the paint through a spray gun and evenly apply it on the surface of an object. It is widely used in the construction, automobile, furniture and other industries, and can be used to spray high-viscosity and low-viscosity paints; the sprayer pushes the reversing device to reverse through the airflow, so that the piston of the pneumatic motor moves back and forth, pressurizes the inhaled paint, and transports it to the spray gun through a high-pressure hose. The spray gun atomizes the paint and sprays it on the surface of the object to be coated to form a film layer; the sprayer has the characteristics of high construction efficiency, uniform and smooth coating, strong paint adhesion, and high paint utilization rate; filters are often installed on the sprayer; however, during the use of the filter, when pressure relief is required, after the pressure relief valve is opened, the spray medium is directly refluxed from the reflux hole without being filtered, so that the pressure relief hole and the reflux hole are often blocked, and the spray medium cannot reflux, resulting in the pressure relief process cannot proceed normally, affecting the normal use of the equipment. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a filter which can effectively prevent the pressure relief holes and the backflow holes from being blocked.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A filter comprises a main body and a filter assembly detachably connected to the main body; the main body is provided with a cavity axially from top to bottom, the lower part of the filter assembly is located in the cavity, and the cavity forms a circumferential gap and a feed gap; the main body is provided with a feed hole connected to the feed gap, a discharge hole connected to the circumferential gap, a pressure regulating hole, and a pressure relief hole.

[0006] Furthermore, a reflux hole connected to the pressure relief hole is provided at the bottom of the main body.

[0007] Furthermore, the filter assembly includes a knob, a support rod, and an annular filter; the lower end of the knob is detachably connected to the upper end of the support rod; the annular filter is sleeved on the support rod, and the upper end is in contact with the lower end of the knob.

[0008] Furthermore, a plurality of protrusions are integrally formed on the lower end of the support rod.

[0009] Furthermore, a feed joint is detachably connected to the feed hole.

[0010] Furthermore, a discharge joint is detachably connected to the discharge hole.

[0011] Furthermore, two first grooves are symmetrically provided on the upper end of the main body; a first connecting hole is provided on the main body between the two first grooves.

[0012] Furthermore, two second grooves are symmetrically provided on the lower part of the main body; and a second connecting hole is provided on the main body between the two first grooves.

[0013] Furthermore, the main body and the filter assembly are connected by threads, and a sealing gasket is installed at the threaded connection position.

[0014] Beneficial effects of the utility model:

[0015] When pressure relief is required during the use of the filter, a pressure relief valve is installed on the pressure relief hole. By adjusting the pressure relief valve, the fluid medium flows into the reflux hole through the pressure relief hole, thereby releasing pressure. Since the reflux medium is filtered by the annular filter, impurities are effectively prevented from blocking the pressure relief hole and the reflux hole, so that the pressure relief process proceeds normally, ensuring the normal use of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a top view of the utility model;

[0018] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0019] Figure 4 for Figure 2 Sectional view at the middle BB;

[0020] Figure 5 The schematic diagram of the structure of the main body;

[0021] Figure 6 is a schematic diagram of the structure of the filter component;

[0022] Figure 7 for Figure 6 Enlarged schematic diagram of point C in the middle.

[0023] In the figure, 1-main body, 2-filter assembly, 3-cavity, 4-circumferential gap, 5-feed gap, 6-feed hole, 7-discharge hole, 8-pressure regulating hole, 9-pressure relief hole, 10-backflow hole, 11-feed joint, 12-discharge joint, 13-first groove, 14-second groove, 15-sealing gasket;

[0024] 21-knob, 22-support rod, 23-annular filter;

[0025] 131 - first connecting hole, 141 - second connecting hole, 221 - protrusion. DETAILED DESCRIPTION

[0026] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] Reference Figure 1-7 As shown, a filter comprises a main body 1 and a filter assembly 2 detachably connected to the main body 1; the main body 1 is axially provided with a cavity 3 from top to bottom, the lower part of the filter assembly 2 is located in the cavity 3, and the cavity 3 forms a circumferential gap 4 and a feed gap 5; the main body 1 is provided with a feed hole 6 connected to the feed gap 5, a discharge hole 7 connected to the circumferential gap 4, a pressure regulating hole 8, and a pressure relief hole 9. The main body 1 is a carrier for the distribution of each hole position of the filter; the filter assembly 2 can effectively filter the fluid medium to ensure the spraying effect; the cavity 3 can accommodate the lower half of the filter assembly 2; when the lower half of the filter assembly 2 is placed in the cavity, the rest of the cavity 3 is divided into a circumferential gap 4 and a feed gap 5; the circumferential gap 4 is located between the main body 1 and the filter assembly 2, and the part located inside and at the lower end of the filter assembly 2 is the feed gap 5; the feed hole 6 is connected to the feed gap 5, which can effectively ensure that the fluid medium entering the cavity 3 can be filtered before flowing to the feed gap 5, and the feed gap 5 is respectively connected to the discharge hole 7, the pressure regulating hole 8, and the pressure relief hole 9, and the pressure relief hole 9 is connected to the reflux hole 10. When the pressure is relieved, the refluxed fluid medium is the medium passing through the filter assembly 2, which effectively prevents it from blocking the pressure relief hole 9 and the reflux hole 10. The pressure regulating hole 8 is connected with a component for pressure regulation, which is a prior art and can be fully understood by those skilled in the art, and will not be repeated here.

[0028] Specifically, in order to facilitate the reflux of the fluid medium during pressure relief, a reflux hole 10 communicating with the pressure relief hole 9 is provided at the bottom of the main body 1 .

[0029] Specifically, the filter assembly 2 includes a knob 21, a support rod 22, and an annular filter 23; the lower end of the knob 21 is detachably connected to the upper end of the support rod 22; the annular filter 23 is sleeved on the support rod 22, and the upper end is in contact with the lower end of the knob 21. The knob 21 can tighten the entire filter assembly 2 on the main body 1. The support rod 22 is made of plastic and is located in the annular filter 23 to support the annular filter 23. The annular filter 23 can effectively filter the fluid medium, remove impurities, and ensure that the fluid medium entering the circumferential gap 4 is free of impurities.

[0030] Specifically, in order to further ensure the stability of the annular filter screen 23 and to ensure a certain gap between the support rod body 22 and the annular filter screen 23 , a plurality of protrusions 221 are integrally formed at the lower end of the support rod body 22 .

[0031] Specifically, in order to facilitate the entry of the fluid medium, a feed connector 11 is detachably connected to the feed hole 6 .

[0032] Specifically, in order to facilitate the outflow of the fluid medium, a discharge joint 12 is detachably connected to the discharge hole 7 .

[0033] Specifically, in order to facilitate the connection between the filter and the spraying machine and other functional equipment, two first grooves 13 are symmetrically provided on the upper end of the main body 1 ; a first connecting hole 131 is provided on the main body 1 between the two first grooves 13 .

[0034] Specifically, in order to further ensure the stability of the connection, two second grooves 14 are symmetrically provided on the lower part of the main body 1; a second connection hole 141 is provided on the main body 1 between the two first grooves 13. The filter can be stably connected to other components through the first connection hole 131 and the second connection hole 141.

[0035] Specifically, in order to ensure the sealing performance of the upper portion of the main body 1 , the main body 1 and the filter assembly 2 are connected by threads, and a sealing gasket 15 is installed at the threaded connection position.

[0036] The working principle of this utility model:

[0037] When the filter is working, the fluid medium enters the feed gap 5 from the feed joint 11 through the feed hole 6, and the fluid medium enters the circumferential gap 4 from the feed gap 5 after being filtered by the annular filter 23 on the filter assembly 2. The discharge hole 7 is connected to the circumferential gap 4, and the fluid medium passing through the annular filter 23 enters the spray gun from the discharge joint 12 through the discharge hole 7 for spraying. During the use of the filter, when pressure relief is required, a pressure relief valve is installed on the pressure relief hole 9. By adjusting the pressure relief valve, the fluid medium flows into the reflux hole 10 through the pressure relief hole 9, thereby relieving pressure. Since the reflux medium is filtered by the annular filter 23, impurities are effectively prevented from blocking the pressure relief hole 9 and the reflux hole 10, so that the pressure relief process proceeds normally, ensuring the normal use of the equipment.

[0038] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A filter, comprising a main body (1) and a filter assembly (2) detachably connected to the main body (1); the main body (1) is provided with a cavity (3) axially from top to bottom, characterized in that: The lower part of the filter assembly (2) is located in the cavity (3), and the cavity (3) forms a circumferential gap (4) and a feed gap (5); the main body (1) is provided with a feed hole (6) connected to the feed gap (5), a discharge hole (7) connected to the circumferential gap (4), a pressure regulating hole (8), and a pressure relief hole (9).

2. The filter according to claim 1, characterized in that: The bottom of the main body (1) is provided with a reflux hole (10) which is in communication with the pressure relief hole (9).

3. The filter according to claim 1, characterized in that: The filter assembly (2) comprises a knob (21), a support rod (22), and an annular filter screen (23); the lower end of the knob (21) is detachably connected to the upper end of the support rod (22); the annular filter screen (23) is sleeved on the support rod (22), and the upper end is in contact with the lower end of the knob (21).

4. The filter according to claim 3, characterized in that: The lower end of the support rod body (22) is integrally formed with a plurality of protrusions (221).

5. The filter according to claim 1, characterized in that: The feed hole (6) is detachably connected to a feed joint (11).

6. The filter according to claim 1, characterized in that: The discharge hole (7) is detachably connected to a discharge joint (12).

7. The filter according to claim 1, characterized in that: Two first grooves (13) are symmetrically provided on the upper end of the main body (1); a first connecting hole (131) is provided on the main body (1) between the two first grooves (13).

8. The filter according to claim 7, characterized in that: Two second grooves (14) are symmetrically provided on the lower part of the main body (1); and a second connecting hole (141) is provided on the main body (1) between the two first grooves (13).

9. The filter according to claim 1, characterized in that: The main body (1) and the filter assembly (2) are connected by threads, and a sealing gasket (15) is installed at the threaded connection position.

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