Filtering device and water feeder

Abstract

The utility model relates to a filtering device and a water feeder. The utility model relates to a filtering device and a water feeder. The filtering device and the water feeder comprise a plug and a filter element, wherein the plug comprises a plug shell and a plug main body; a shell opening is formed in one side of the plug shell; the plug main body can slide relative to the plug shell so as to close or open the shell opening; the filter comprises a filter shell and a filter screen; one side of the filter shell can abut against the second end of the plug main body and is provided with a through hole facing the plug main body; and when the filter shell pushes the plug main body to slide into the plug shell, the shell opening is opened, and the interior of the filter shell is communicated with the interior of the plug shell. The filtering device and the water supply device have the advantages of being detachable, simple in structure, wide in application range and capable of being used repeatedly.

Description

Technical Field

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

[0002] During the use of dental equipment, water is required for flushing and other operations. Therefore, a water pump is usually provided inside the main unit, and an external water source supplies water to a water tank. The water pump is connected to the water tank to pump the water stored in the water tank. The water pump pumps water for the main unit of the dental equipment. To prevent foreign objects or larger particles from entering the water pump along with the flowing water, causing damage or blockage to the water pump, or the foreign objects spraying out along the internal pipeline and directly entering the patient's oral cavity, resulting in accidents, it is particularly important to add a filtering device at the front end of the water pump.

[0003] The filtering devices used in the prior art usually filter by setting a filter screen inside. After being used for a period of time, the filter screen will be contaminated by foreign objects, affecting the filtering effect. Moreover, the existing filtering devices are of an integral structure, making it difficult to clean and repair. After being damaged, only a new filtering device can be replaced, resulting in a high use cost. And during the replacement process of the filtering device, water will overflow. The unfiltered water entering the water pump will pollute the water source or damage the water pump. Summary of the Utility Model

[0004] Based on this, the purpose of the present utility model is to provide a filtering device and a water supply device.

[0005] A filtering device includes a plug, which includes a plug housing and a plug body; one side of the plug housing is provided with a housing opening; the first end of the plug body is inserted into the plug housing and the second end extends out of the plug housing from the housing opening, and the plug body can slide relative to the plug housing to close or open the housing opening; a filter, which includes a filter housing and a filter screen; one side of the filter housing can abut against the second end of the plug body and is provided with a through hole facing the plug body; the filter screen covers the opening on the side of the filter housing away from the plug body; when the filter housing pushes the plug body to slide into the plug housing, the housing opening is opened, and the inside of the filter housing is communicated with the inside of the plug housing; when the plug body moves out of the plug housing, the housing opening is closed, and the inside of the filter housing is separated from the inside of the plug housing.

[0006] The filtering device described in the present utility model is installed in a water circuit. The filtering device can be easily disassembled, the filter screen can be cleaned and reused. The filter screen can be replaced with filter screens of different mesh numbers according to needs to obtain different filtering precisions, making the manufacturing more flexible and the application range wider. The overall structure is simple and the cost is low. When installing the filter, the plug is pushed open to open the water circuit. When disassembling the filter, the plug can be reset to block the water circuit, so that the unfiltered water will not enter the water pump to cause pollution or damage.

[0007] Further, a channel is provided inside the plug housing, and a water inlet is provided on the side. The channel communicates between the water inlet and the opening of the housing. The aperture of the opening of the housing is smaller than the inner diameter of the channel, so as to form an abutting portion at the opening of the housing. The plug body protrudes radially with a plug shoulder. The plug shoulder is located in the channel, and its outer diameter is larger than the aperture of the opening of the housing and smaller than the inner diameter of the channel.

[0008] Further, the plug further includes an elastic member. The elastic member is disposed in the channel, one end of which abuts against the inner top wall of the plug housing, and the other end abuts against the plug shoulder. The elastic member can push the plug body towards the opening of the housing.

[0009] Further, the elastic member is a spring.

[0010] Further, a protruding portion protruding towards the plug body is provided on a side of the filter housing away from the filter screen. A groove is provided on the protruding portion, and the through hole is provided in the groove. The protruding portion abuts against the second end of the plug body, so that the through hole is separated from the plug body by a certain distance.

[0011] Further, the cross-sectional area of the through hole increases step by step along the direction away from the plug. The filter further includes a gland, and the gland is disposed between the opening of the filter housing and the filter screen.

[0012] Further, the filter is a metal part.

[0013] The present utility model also provides a water supply device, including any one of the above-mentioned filtering devices; a water tank, the water tank including a water outlet and a connecting member provided outside the water outlet; the connecting member surrounds the water outlet of the water tank, the plug passes through the water outlet, and the filter is detachably installed on the connecting member; at least a part of the plug housing is located in the water tank, and the outer diameter of the part located inside the water tank is larger than the diameter of the water outlet of the water tank; a water pump, which is connected to the connecting member.

[0014] Further, sealing rings are respectively provided at the connection between the plug and the water tank and at the connection between the plug and the connecting member.

[0015] Further, the connecting member is provided with an internal thread, and the filter housing is provided with an external thread, and the connecting member is in threaded engagement with the filter housing.

[0016] For better understanding and implementation, the present utility model will be described in detail below with reference to the accompanying drawings. Description of the Drawings

[0017] Figure 1 is an overall schematic diagram of the water supply device in the present utility model;

[0018] Figure 2 is an overall schematic diagram of the filtering device in the present utility model;

[0019] Figure 3 is a sectional view taken along the Figure 2 line A-A after sectioning;

[0020] Figure 4 is a structural schematic diagram of the filter in the present utility model.

[0021] Markings in the figure:

[0022] 1. Water tank; 11. Connecting member; 111. Interface

[0023] 2. Filtering device; 21. Plug; 22. Filter

[0024] 211. Plug housing; 2111. Channel; 2112. Water inlet; 2113. Housing opening; 2114. Contact portion

[0025] 212. Plug main body; 2121. Plug shoulder; 213. Spring

[0026] 221. Filter housing; 2211. Through hole; 2212. Protrusion; 2213. Groove

[0027] 222. Filter screen; 223. gland. Detailed Embodiment

[0028] The present utility model designs a detachable filter. The filter screen inside the filter can be detached and cleaned separately, and can be reused, saving the use cost. At the same time, in order to prevent water leakage at the water outlet of the water tank during the disassembly of the filter, a plug structure is provided at the water outlet of the water tank. When the filter is installed, the plug is pushed open to open the water path. When the filter is disassembled, the plug can be reset to block the water path. Therefore, the unfiltered water will not enter the water pump to cause pollution or damage.

[0029] Please refer to Figures 1 to 4 , the water supply device of the present utility model includes a water tank 1, a filtering device 2 and a water pump (not shown in the figure), and the filtering device 2 is arranged between the water tank 1 and the water pump.

[0030] Among them, the water tank 1 is provided with a water outlet, and a connecting piece 11 is arranged outside the water outlet of the water tank 1. The connecting piece 11 surrounds the water outlet of the water tank 1 and is provided with an interface 111 leading to the water pump. An internal thread is arranged in the interface 111 for connecting the filtering device 2.

[0031] The filtering device 2 includes a plug 21 and a filter 22. The plug 21 is arranged at the water outlet of the water tank 1 and includes a plug housing 211, a plug body 212 and an elastic member. In this embodiment, the elastic member is a spring 213. The plug housing 211 passes through the water outlet of the water tank 1, and at least a part of it is arranged inside the water tank 1. A channel 2111 with an extending direction parallel to the axial direction of the water outlet of the water tank 1 is arranged inside the plug housing 211. The outer diameter of one side of the plug housing 211 located inside the water tank 1 is larger than the diameter of the water outlet of the water tank 1, so that the plug housing 211 can cover the water outlet of the water tank 1. An inlet 2112 communicating with the channel 2111 is arranged on the side surface of the plug housing 211, and the inlet 2112 is arranged inside the water tank 1. An outer shell opening 2113 communicating with the channel 2111 is arranged at one end of the plug housing 211 away from the water tank 1, and the outer shell opening 2113 faces the outside of the water tank 1. The aperture of the outer shell opening 2113 is smaller than the inner diameter of the channel 2111, thereby forming an abutting portion 2114, and the inlet 2112 communicates with the outer shell opening 2113; the plug body 212 and the spring 213 are arranged inside the channel 2111. In this embodiment, the plug body 212 is a cylindrical structure, and its axial direction is parallel to the extending direction of the channel 2111, and a plug shoulder 2121 protruding radially is arranged, and the plug shoulder 2121 is located inside the channel 2111. The outer diameter of the plug shoulder 2121 is larger than the aperture of the outer shell opening 2113 and smaller than the inner diameter of the channel 2111. The water flowing in from the inlet 2112 flows in the gap between the plug body 212 and the plug housing 211; one end of the plug body 212 extends out of the plug housing 211 from the outer shell opening 2113 and is located inside the connecting member 11; the spring 213 is located inside the channel 2111, one end of it abuts against the inner top wall of the plug housing 211, and the other end abuts against the plug shoulder 2121. When the spring 213 is not compressed, the plug shoulder 2121 is close to the outer shell opening 2113 under the action of elastic force and blocks the outer shell opening 2113; under the action of an external force, the plug body 212 moves away from the outer shell opening 2113 direction, and at the same time compresses the spring 213. At this time, the outer shell opening 2113 is opened, and the water in the water tank 1 flows out through the outer shell opening 2113; when the external force is removed, the spring 213 is released, so that the plug body 212 moves towards the outer shell opening 2113 direction and blocks the outer shell opening 2113, blocking the water path.

[0032] The filter 22 is arranged outside the housing opening 2113 and includes a filter housing 221, a filter screen 222, and a gland 223. The filter housing 221 is provided with an external thread and is installed in and threadedly connected to the connector 11. The filter housing 221 is axially provided with a through hole 2211 communicating with its interior along the plug body 212. The water flowing out of the plug housing 211 flows into the filter housing 221 through the through hole 2211. In this embodiment, a convex portion 2212 protruding toward the plug body 212 is provided on one side of the filter housing 221 facing the plug body 212. A groove 2213 is provided on the convex portion 2212. The length of the groove 2213 is greater than the outer diameter of the end of the plug body 2 protruding from the plug housing 211, and the width is less than the outer diameter of the end of the plug body 2 protruding from the plug housing 211. The plug body 212 is pushed by the convex portion 2212 toward the inner top wall of the plug housing 211 and is separated from the through hole 2211 by a certain distance. The through hole 2211 communicates with the groove 2213. The water flow flowing out of the housing opening 2113 enters the through hole 2211 through the groove 2213. The cross-sectional area of the through hole 2211 increases step by step along the direction away from the plug 21. The filter screen 222 is installed on the side of the through hole 2211 away from the plug 21 and covers the opening of the end of the through hole 2211 away from the plug body 212. The filter screen 222 can be selected with different mesh numbers according to needs to obtain different filtration precisions. The gland 223 is a hollow ring and is press-fitted into the through hole 2211 and abuts against the filter screen 222 to fix the filter screen 222 in the through hole 2211 and prevent it from falling out of the through hole 2211 from the side away from the plug 21. The through hole 2211 is connected to the inlet of the water pump. The water flow filtered by the filter screen 222 flows through the hollow part of the gland 223 to the water pump. The filter screen 222 and the gland 223 can be disassembled from the through hole 2211. After the filter 22 is installed into the connector 11 by threading, the groove 2213 of the filter 22 abuts against the end of the plug body protruding from the plug housing 211 and pushes the plug body 212 into the plug housing 211. The plug shoulder 2121 moves away from the opening of the plug housing 211, and at the same time, the spring 213 is compressed. At this time, the waterway is opened, and the water flow in the water tank 1 passes through the groove 2213, flows through the filter screen 222 in the through hole 2211, and enters the water pump after being filtered.

[0033] When the filter screen 222 needs to be cleaned, the filter 22 is removed. Under the elastic force of the spring 213, the plug main body 212 blocks the housing opening 2113, so that the water tank 1 does not leak, and the unfiltered water does not enter the water pump to pollute the water source or damage the water pump. After the filter 22 is removed, the filter screen 222 and the gland 223 are removed from the filter 22. After the filter screen 222 is cleaned, it is installed into the connector 221, and then the gland 223 is press-fitted into the connector 221 with an interference fit to fix the filter screen 222 in the connector 221. Or, it is not necessary to disassemble the filter screen 222 and the gland 223 from the filter 22. The filter 22 can be cleaned as a whole by directly flushing through the opening at one end of the connector 221 close to the gland 223.

[0034] Preferably, the filter 22 is a metal part and can be sterilized under high temperature and high pressure conditions.

[0035] The connector 11 of the water tank 1 keeps the connection between the plug main body 212 and the filter 22 closed, allowing the water source to enter the filter 22 and preventing leakage to other parts.

[0036] Preferably, sealing rings are respectively arranged at the connection between the plug 21 and the water tank 1 and at the connection between the plug 21 and the connector 11 to improve the sealing performance.

[0037] For the filtering device and the water supply device of the present utility model, the filter 22 can be easily disassembled. Only by cleaning the filter screen 222 can it be reused. After the filter 22 is disassembled, the plug main body 212 blocks the waterway, and the unfiltered water source does not enter the water pump to pollute the water source or damage the water pump. The overall structure is simple and the cost is low. Moreover, the filter screen 222 can be replaced with filter screens of different meshes according to needs to obtain different filtration precisions, making the manufacturing more flexible and the application range wider.

[0038] The above embodiments only represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and the present utility model also intends to include these modifications and improvements.

Claims

1. A filtering device, characterized in that: include: A plug, comprising a plug shell and a plug body; A shell opening is provided on one side of the plug shell; a first end of the plug body is inserted into the plug shell and a second end extends from the shell opening to the outside of the plug shell, and the plug body can slide relative to the plug shell to close or open the shell opening; A filter, including a filter housing and a filter screen; One side of the filter housing can abut against the second end of the plug body and is provided with a through hole facing the plug body; the filter screen covers the opening of the filter housing on the side away from the plug body; When the filter housing pushes the plug body to slide into the plug housing, the housing opening opens, and the interior of the filter housing is connected to the interior of the plug housing; when the plug body moves out of the plug housing, the housing opening closes, and the interior of the filter housing is separated from the interior of the plug housing.

2. The filtering device according to claim 1, characterized in that: A channel is provided inside the plug shell, and a water inlet is opened on the side. The channel is connected between the water inlet and the shell opening. The aperture of the shell opening is smaller than the inner diameter of the channel, thereby forming an abutment portion at the shell opening; the plug body is provided with a plug shoulder protruding along the radial direction; the plug shoulder is located in the channel, and the outer diameter is larger than the aperture of the shell opening and smaller than the inner diameter of the channel.

3. The filtering device according to claim 2, characterized in that: The plug further comprises an elastic member, which is arranged in the channel, one end of which abuts against the inner top wall of the plug shell, and the other end of which abuts against the shoulder of the plug; The elastic member can push the plug body toward the housing opening.

4. The filtering device according to claim 3, characterized in that: The elastic member is a spring.

5. The filtering device according to claim 1, characterized in that: A protrusion protruding toward the plug body is provided on one side of the filter housing away from the filter screen, the protrusion is provided with a groove, the through hole is provided in the groove, the protrusion abuts against the second end of the plug body, so that the through hole is separated from the plug body by a distance.

6. The filtering device according to claim 1, characterized in that: The cross-sectional area of ​​the through hole increases in a step-wise manner in a direction away from the plug; the filter further comprises a pressure cover, which is arranged between the opening of the filter housing and the filter screen.

7. The filtering device according to claim 1, characterized in that: The filter is a metal part.

8. A water supply device, characterized in that: include: The filtering device according to any one of claims 1 to 7; A water tank, the water tank comprising a water outlet and a connecting piece arranged outside the water outlet; The connecting piece surrounds the water outlet of the water tank, the plug passes through the water outlet, and the filter is detachably mounted on the connecting piece; at least a portion of the plug housing is located in the water tank, and the outer diameter of the plug housing on one side inside the water tank is greater than the diameter of the water outlet of the water tank; A water pump is connected to the connecting piece.

9. The water supply device according to claim 8, characterized in that: Sealing rings are respectively arranged at the connection between the plug and the water tank and at the connection between the plug and the connecting piece.

10. The water supply device according to claim 8, characterized in that: The connecting piece is provided with an internal thread, the filter housing is provided with an external thread, and the connecting piece is threadably matched with the filter housing.

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