Filter screen structure convenient to replace

Abstract

The utility model discloses a filter screen structure convenient to replace, which comprises a barrel and a bottom ring plate, the top end of the barrel is fixedly connected with a top ring plate, the bottom ring plate is positioned at the bottom of the barrel, the surface of the barrel is sleeved with a filter screen, the surface of the top end of the barrel is sleeved with an internal thread ring used for fixing the top of the filter screen, and the top end of the barrel is fixedly connected with the bottom ring plate. And an inner ring plate and an outer ring plate are fixed on the upper surface of the bottom ring plate. According to the utility model, the cylinder body, the top ring plate, the bottom ring plate, the filter screen, the internal thread ring, the inner ring plate and the outer ring plate are arranged, the filter screen is sleeved on the surface of the cylinder body, the top of the filter cylinder is extruded and fixed through the internal thread ring, the inner ring plate and the outer ring plate on the surface of the bottom ring plate form the annular extrusion groove, and the bottom of the filter screen can be extruded and fixed at the bottom of the cylinder body by utilizing the annular extrusion groove; according to the structure, when the filter screen is replaced, the filter screen can be pulled out from the surface of the cylinder body and replaced only by screwing off the bottom ring plate and the internal thread ring, and the replacement mode is simpler and more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of water purifiers, in particular to a filter screen structure which is convenient to replace. Background Technique

[0002] A water purifier, also known as a water purification machine or water quality purifier, is a water treatment device that deeply filters and purifies water quality according to the usage requirements of water. Generally speaking, the water purifier usually refers to a small purifier for household use. The technical core of it is the filter membrane in the filter element device, and the main technologies come from three types: ultrafiltration membrane, RO reverse osmosis membrane, and nanofiltration membrane.

[0003] The initial filtration of the water purifier uses a filter screen to intercept large particulate impurities in the water. However, with the use of the water purifier, the mesh holes of the filter screen will gradually become blocked, and it is necessary to clean or replace the filter screen regularly. At present, the filter screens are all fixed on the surface of the filter frame by bolts, so special tools are required for disassembly and replacement of the filter screen during installation and disassembly, and the disassembly and installation are not simple and convenient. Therefore, the utility model proposes a filter screen structure that is convenient to replace. Content of the Utility Model

[0004] The purpose of the utility model is to solve the defects existing in the prior art, and to propose a filter screen structure that is convenient to replace.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a filter screen structure that is convenient to replace, including a cylinder body and a bottom ring plate. The top end of the cylinder body is fixedly connected with a top ring plate. The bottom ring plate is located at the bottom of the cylinder body. A filter screen is sleeved on the surface of the cylinder body. An internal thread ring for fixing the top of the filter screen is sleeved on the surface of the top end of the cylinder body. An inner ring plate and an outer ring plate are fixed on the upper surface of the bottom ring plate. A circular extrusion groove for extruding and fixing the bottom of the filter screen is formed between the inner ring plate and the outer ring plate.

[0006] Further, a plurality of hollow grooves are equidistantly arranged on the side wall of the cylinder body.

[0007] Further, an external thread step is arranged on the outer side wall of the top end of the cylinder body and below the top ring plate, and the internal thread ring is rotationally connected with the surface of the external thread step.

[0008] Further, an extrusion opening with a diameter smaller than that of the external thread step is arranged at the bottom end of the internal thread ring. A slope step is arranged on the surface of the top end of the cylinder body and below the external thread step, and the outer diameter of the slope step is smaller than that of the external thread step. The top of the filter screen is clamped between the extrusion opening and the slope step.

[0009] Further, the surface of the inner ring plate is provided with an external thread, and the inner wall of the bottom end of the cylinder body is provided with an internal thread. The inner ring plate is rotationally connected with the inner wall of the bottom end of the cylinder body through the thread. The bottom end of the filter screen is located inside the circular extrusion groove.

[0010] Further, the inner side wall of the outer ring plate is inclined, and a sealing gasket is fixed on the inner side wall of the outer ring plate.

[0011] Further, annular grooves are formed on the upper surface of the top ring plate and the lower surface of the bottom ring plate, and sealing rings are clamped inside the annular grooves.

[0012] Advantages of the utility model:

[0013] When the utility model is in use, for a filter screen structure which is convenient to replace, a cylinder body, a top ring plate, a bottom ring plate, a filter screen, an internal thread ring, an inner ring plate and an outer ring plate are provided. The filter screen is sleeved on the surface of the cylinder body, the top of the filter cylinder is fixed by extrusion through the internal thread ring, and the inner ring plate and the outer ring plate on the surface of the bottom ring plate form an annular extrusion groove. The bottom of the filter screen can be fixed at the bottom of the cylinder body by using the annular extrusion groove. Therefore, when replacing the filter screen, only the bottom ring plate and the internal thread ring need to be unscrewed, and then the filter screen can be removed from the surface of the cylinder body and replaced. The replacement method is simpler and more convenient. Description of the drawings

[0014] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for use in the following description of the specific embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 : The three-dimensional view of the present utility model after installing the filter screen;

[0016] Figure 2 : The three-dimensional view of the present utility model before installing the filter screen;

[0017] Figure 3 : The cross-sectional view of the present utility model;

[0018] Figure 4 : The Figure 3 enlarged view at position A of the present utility model;

[0019] Figure 5 : The Figure 3 enlarged view at position B of the present utility model.

[0020] The reference signs are as follows:

[0021] 1. Cylinder body; 101. Hollow groove; 102. External thread step; 103. Inclined surface step; 2. Top ring plate; 3. Bottom ring plate; 4. Filter screen; 5. Internal thread ring; 6. Extrusion port; 7. Inner ring plate; 8. Outer ring plate; 9. Annular groove; 10. Sealing ring; 11. Sealing gasket. Specific embodiments

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] As Figures 1 - 5 shown, it relates to a filter screen structure that is convenient for replacement, including a cylinder body 1 and a bottom ring plate 3. A top ring plate 2 is fixedly connected to the top end of the cylinder body 1. The bottom ring plate 3 is located at the bottom of the cylinder body 1. A filter screen 4 is sleeved on the surface of the cylinder body 1. An internal thread ring 5 for fixing the top of the filter screen 4 is sleeved on the surface of the top end of the cylinder body 1. An inner ring plate 7 and an outer ring plate 8 are fixedly arranged on the upper surface of the bottom ring plate 3. An annular extrusion groove for extruding and fixing the bottom of the filter screen 4 is formed between the inner ring plate 7 and the outer ring plate 8.

[0024] A plurality of hollow grooves 101 are equidistantly arranged on the side wall of the cylinder body 1.

[0025] In this embodiment, the water passing through the filter passes through the hollow grooves 101 on the side wall of the cylinder body 1, and the cylinder body 1 plays a supporting role for the filter screen 4.

[0026] An external thread step 102 is arranged on the outer side wall of the top end of the cylinder body 1 and below the top ring plate 2. The internal thread ring 5 is rotationally connected to the surface of the external thread step 102.

[0027] The internal thread ring 5 can be screwed onto the surface of the external thread step 102 to realize the fixation of the internal thread ring 5.

[0028] An extrusion opening 6 with a diameter smaller than that of the external thread step 102 is arranged at the bottom end of the internal thread ring 5. A bevel step 103 is arranged on the surface of the top end of the cylinder body 1 and below the external thread step 102, and the outer diameter of the bevel step 103 is smaller than that of the external thread step 102. The top of the filter screen 4 is clamped between the extrusion opening 6 and the bevel step 103.

[0029] When the internal thread ring 5 is screwed onto the surface of the external thread step 102, the extrusion opening 6 will slowly approach the surface of the bevel step 103, thereby extruding and fixing the top of the filter screen 4 on the surface of the bevel step 103.

[0030] External threads are arranged on the surface of the inner ring plate 7, internal threads are arranged on the inner wall of the bottom end of the cylinder body 1, and the inner ring plate 7 is rotationally connected to the inner wall of the bottom end of the cylinder body 1 through threads. The bottom end of the filter screen 4 is located inside the annular extrusion groove.

[0031] The inner ring plate 7 can be screwed onto the inner side wall of the bottom end of the cylinder body 1, so as to use the annular extrusion groove to extrude and fix the bottom of the filter screen 4.

[0032] The inner side wall of the outer ring plate 8 is inclined, and a gasket 11 is fixed on the inner side wall of the outer ring plate 8. The gasket 11 can increase the sealing performance between the bottom ring plate 3, the outer ring plate 8 and the cylinder body 1.

[0033] Annular grooves 9 are provided on the upper surface of the top ring plate 2 and the lower surface of the bottom ring plate 3, and sealing rings 10 are clamped inside the annular grooves 9.

[0034] In this embodiment, the sealing ring 10 can increase the sealing performance between the top ring plate 2, the bottom ring plate 3 and the water purification device during installation.

[0035] Working principle: When the filter screen 4 needs to be replaced, first rotate the outer ring plate 8 to drive the inner ring plate 7 to disengage from the inner wall of the bottom of the cylinder body 1, and then turn the internally threaded ring 5 to disengage it from the externally threaded step 102. At this time, the filter screen 4 can be pulled out from the surface of the cylinder body 1. Then, a new filter screen 4 is put on the surface of the cylinder body 1, and the top of the filter screen 4 is put on the surface of the inclined step 103. Next, the internally threaded ring 5 is screwed back onto the externally threaded step 102, and the top of the filter screen 4 is squeezed onto the inclined step 103 by the squeezing port 6. Finally, the inner ring plate 7 is screwed back onto the inner wall of the bottom end of the cylinder body 1.

[0036] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific embodiments. Obviously, according to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A filter screen structure that is easy to replace, characterized in that: The invention comprises a cylinder (1) and a bottom ring plate (3), wherein the top end of the cylinder (1) is fixedly connected to a top ring plate (2), the bottom ring plate (3) is located at the bottom of the cylinder (1), a filter screen (4) is sleeved on the surface of the cylinder (1), an internal threaded ring (5) for fixing the top of the filter screen (4) is sleeved on the top end surface of the cylinder (1), an inner ring plate (7) and an outer ring plate (8) are fixed on the upper surface of the bottom ring plate (3), and an annular extrusion groove for squeezing and fixing the bottom of the filter screen (4) is formed between the inner ring plate (7) and the outer ring plate (8).

2. The filter structure that is easy to replace according to claim 1 is characterized in that: The side wall of the cylinder (1) is provided with a plurality of hollow grooves (101) at equal intervals.

3. The filter screen structure that is easy to replace according to claim 1 is characterized in that: An external thread step (102) is provided on the outer wall of the top end of the cylinder (1) and below the top ring plate (2), and the internal thread ring (5) is rotatably connected to the surface of the external thread step (102).

4. The filter structure that is easy to replace according to claim 3 is characterized in that: The bottom end of the internal thread ring (5) is provided with an extrusion port (6) whose diameter is smaller than the external thread step (102); the top surface of the cylinder (1) is provided with an inclined step (103) below the external thread step (102); the outer diameter of the inclined step (103) is smaller than that of the external thread step (102); and the top of the filter screen (4) is clamped between the extrusion port (6) and the inclined step (103).

5. The filter structure that is easy to replace according to claim 1 is characterized in that: The surface of the inner ring plate (7) is provided with an external thread, the inner wall of the bottom end of the cylinder (1) is provided with an internal thread, and the inner ring plate (7) and the inner wall of the bottom end of the cylinder (1) are rotatably connected via threads, and the bottom end of the filter screen (4) is located inside the annular extrusion groove.

6. The filter screen structure that is easy to replace according to claim 1 is characterized in that: The inner side wall of the outer ring plate (8) is designed to be inclined, and a sealing gasket (11) is fixed to the inner side wall of the outer ring plate (8).

7. The filter structure that is easy to replace according to claim 1 is characterized in that: An annular groove (9) is provided on the upper surface of the top ring plate (2) and the lower surface of the bottom ring plate (3), and a sealing ring (10) is clamped inside the annular groove (9).

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