CN221061911U - Pre-filter - Google Patents

Abstract

The utility model relates to the technical field of filters, in particular to a pre-filter, which aims to solve the problem that the operation of the existing pre-filter is inconvenient. For this purpose, the prefilter of the present utility model comprises a valve cover, a filter flask, a central shaft and a plug. Wherein, the valve cover is provided with a connecting part for communicating water inlet and outlet; the lower end of the filter flask is provided with a sewage outlet, and the upper end of the filter flask is connected with the valve cover in a sealing way; the central shaft rod is positioned in the filter flask, and one end of the central shaft rod passes through the top of the valve cover and is positioned outside the valve cover; the plug is positioned in the filter flask, and one end of the plug is arranged opposite to the sewage outlet; the central shaft rod is movably connected with the valve cover, and one end of the central shaft rod is pulled or rotated so that the other end of the central shaft rod can drive the plug to be away from the sewage outlet or to be propped against the sewage outlet. Through such setting, the user only need the one end of operating the center axostylus axostyle on the valve gap, can open or close the drain of filter flask lower extreme, has improved the convenience of user's operation prefilter.

Description

Pre-filter

Technical Field

The utility model relates to the technical field of filters, and particularly provides a pre-filter.

Background

The pre-filter is usually arranged on the household water inlet main pipeline to realize primary filtration and purification of raw water.

A ball valve is typically installed at the drain at the bottom of the pre-filter for flushing the pre-filter. Before or after entering the flushing state, because the prefilter is usually arranged vertically, a user is often required to extend below the prefilter to open or close the ball valve, the prefilter is inconvenient to operate, and the user experience is poor.

Accordingly, there is a need in the art for a new pre-filter to address the above-described problems.

Disclosure of utility model

In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the operation of the existing pre-filter is inconvenient.

In a first aspect, the present utility model provides a pre-filter comprising: the valve cover is provided with a connecting part for communicating water inlet and outlet; the lower end of the filter flask is provided with a sewage outlet, and the upper end of the filter flask is connected with the valve cover in a sealing way; a central shaft within the filter flask, one end of the central shaft passing through the top of the valve cap and being located outside of the valve cap; the plug is positioned in the filter flask, and one end of the plug is arranged opposite to the sewage outlet; the central shaft rod is movably connected with the valve cover, and one end of the central shaft rod is pulled or rotated so that the other end of the central shaft rod can drive the plug to be away from the sewage outlet or to be abutted to seal the sewage outlet.

Under the condition of the preferable technical scheme of the pre-filter, the filter flask comprises a shell and a filter cylinder positioned in the shell, the drain outlet is formed in the shell, a threaded opening is formed in the bottom of the filter cylinder, an external thread is arranged in the circumferential direction of the plug, the other end of the central shaft rod drives the plug so that the external thread is in rotary fit with the threaded opening, and the plug is driven to axially move along the central shaft rod.

Under the condition of the preferable technical scheme of the pre-filter, the other end of the plug is provided with a cylindrical structure, the external thread is formed on the outer wall of the cylindrical structure, a guide groove is formed in the inner wall of the cylindrical structure, the cylindrical structure is sleeved at the other end of the central shaft rod, a guide edge is arranged on the circumferential direction of the other end of the central shaft rod, and the guide edge is in sliding fit with the guide groove along the axial direction of the central shaft rod.

Under the condition of the preferable technical scheme of the pre-filter, the number of the guide grooves and the number of the guide edges are multiple, the guide grooves are uniformly distributed along the circumferential direction of the inner wall of the cylindrical structure, and the guide edges are uniformly distributed along the circumferential direction of the other end of the central shaft rod.

In the case of the above-mentioned preferred technical solution of the prefilter, the central shaft has a hollow tube structure, the hollow tube structure is in communication with the tubular structure, and the hollow tube structure is provided with siphon ports axially distributed along the central shaft.

In the case of the preferred embodiment of the prefilter described above, the siphon port is located close to the inner wall of the filter cartridge.

In the case of the above-mentioned preferred solution of the pre-filter, the pre-filter comprises a knob fixedly connected with one end of the central shaft.

In the case of the preferred embodiment of the prefilter described above, the valve cover comprises an outer copper shell and an inner plastic shell.

In the case of the preferred technical solution of the prefilter described above, a movable joint is provided between the connection portion and the valve cover.

Under the condition of the preferable technical scheme of the pre-filter, one end of the plug is provided with a conical structure, and the drain outlet is plugged by the conical structure.

Under the condition of the preferable technical scheme of the pre-filter, one end of the plug is provided with a conical structure, and the drain outlet is plugged by the conical structure.

As will be appreciated by those skilled in the art, the prefilter of the present utility model includes a valve cap, a filter flask, a central shaft, and a plug. Wherein, the valve cover is provided with a connecting part for communicating water inlet and outlet; the lower end of the filter flask is provided with a sewage outlet, and the upper end of the filter flask is connected with the valve cover in a sealing way; the central shaft rod is positioned in the filter flask, and one end of the central shaft rod passes through the top of the valve cover and is positioned outside the valve cover; the plug is positioned in the filter flask, and one end of the plug is arranged opposite to the sewage outlet; the central shaft rod is movably connected with the valve cover, and one end of the central shaft rod is pulled or rotated so that the other end of the central shaft rod can drive the plug to be away from the sewage outlet or to be propped against the sewage outlet. Through such setting, the user only need the one end of operating the center axostylus axostyle on the valve gap, can open or close the drain of filter flask lower extreme, has improved the convenience of user's operation prefilter.

Further, the filter flask comprises a shell and a filter cylinder positioned in the shell, the drain outlet forms the shell, a threaded opening is formed in the bottom of the filter cylinder, external threads are formed in the circumference of the plug, the other end of the central shaft rod drives the plug so that the external threads are in rotary fit with the threaded opening, and the plug is driven to move along the axial direction of the central shaft rod. Through the arrangement, the plug is enabled to be in threaded connection displacement with the filter cylinder by means of the central shaft rod, so that the plug ascends or descends along the axial direction of the central shaft rod to open or close the drain outlet, and the effect of opening and closing the drain outlet on the valve cover is achieved.

Further, the other end of the plug is provided with a cylindrical structure, an external thread is formed on the outer wall of the cylindrical structure, a guide groove is formed in the inner wall of the cylindrical structure, the cylindrical structure is sleeved at the other end of the central shaft rod, a guide edge is arranged on the circumferential direction of the other end of the central shaft rod, and the guide edge and the guide groove are in sliding fit along the axial direction of the central shaft rod. Through the arrangement, the stability and the use safety of the plug in axial sliding on the central shaft lever are improved.

Further, the central shaft lever is provided with a hollow pipe structure, the hollow pipe structure is communicated with the cylindrical structure, and the hollow pipe structure is provided with siphon ports which are axially distributed along the central shaft lever. Through the arrangement, when the front filter is in a flushing state, the waste water in the filter cylinder can be more smoothly and rapidly discharged downwards through the siphon port by virtue of the siphon port, so that the pollution discharge efficiency in the filter cylinder is improved.

Further, the siphon port is disposed adjacent to the inner wall of the filter cartridge. By such arrangement, when the front filter is in a flushing state and the central shaft lever is rotated, dirt on the filter cartridge can be quickly discharged by the flow of siphon water sucked into the flow passage of the hollow tube structure by the flow of water entering the siphon inlet.

Further, the valve cover comprises a copper outer shell and a plastic inner shell. Through such setting, on the one hand the front-end filter can effectively prevent that the heavy metal of valve gap from precipitating to the aquatic, and on the other hand also ensures the structural strength of front-end filter, has improved the security of front-end filter filtration water purification.

Further, a movable joint is arranged between the connecting part and the valve cover. Through such setting, with the help of the movable joint, the user can be according to the actual layout space and the position of business turn over water pipeline so that connecting portion and business turn over water pipeline more nimble adaptation have improved front-end filter installation flexibility and convenience.

Further, one end of the plug is provided with a conical structure, and the drain outlet is plugged by the conical structure. Through such setting, the toper structure is convenient for avoid dripping with drain shutoff, has improved the sealing security of leading filter.

Drawings

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of the overall structure of a prefilter of the present utility model;

FIG. 2 is a schematic view of the water flow state of the prefilter of the present utility model in an operating state;

FIG. 3 is a schematic view showing the state of water flow in the state of sewage discharged from the prefilter of the present utility model

FIG. 4 is a schematic view of the structure of the central shaft of the prefilter of the present utility model;

FIG. 5 is a schematic view of the structure of a plug of a prefilter of the present utility model;

Fig. 6 is a schematic structural view of a cartridge of the prefilter of the present utility model.

List of reference numerals:

1. A valve cover; 11. a housing; 12. an inner case; 2. a housing; 21. a sewage outlet; 3. a knob; 4. a connection part; 41. a water inlet; 42; a water outlet; 43. a movable joint; 5. a central shaft; 51. a siphon port; 52. a first drive end, 53, a second drive end; 531. a guide rib; 6. a plug; 61. an external thread; 62. a conical structure; 63. a guide groove; 7. a filter cartridge; 71. and (5) a threaded opening.

Detailed Description

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "inner," "outer," and the like, which indicate a direction or a positional relationship, are based on the direction or the positional relationship shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; the two components can be mechanically connected, can be directly connected or can be indirectly connected through an intermediate medium, and can be communicated with each other. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Specifically, as shown in fig. 1 to 3, the prefilter of the present utility model includes a valve cover 1, a filter flask, a central shaft 5, and a plug 6. The valve cover 1 is provided with a connecting part 4 for communicating water inlet and water outlet, the connecting part 4 comprises a water inlet 41 and a water outlet 42, and the middle of the connecting part 4 is tightly and tightly connected with the valve cover 1 in a sealing way through a movable joint 43. The user can adapt the connection part 4 to the water inlet and outlet pipeline more flexibly according to the actual layout space and position of the water inlet and outlet pipeline to improve the flexibility and convenience of installing the prefilter.

As shown in fig. 1 to 3, a drain outlet 21 is arranged at the bottom end of a filter flask of the prefilter of the present utility model, and the filter flask is hermetically connected with a valve cover 1. Specifically, the filter flask includes a housing 2 and a filter cartridge 7 positioned within the housing 2. Wherein, drain 21 forms in the lower extreme of casing 2, and the upper end of casing 2 and valve gap 1 screw thread sealing connection. The chamber of the filter cartridge 7 is communicated with the water inlet 41 of the connecting part 4, an annular flow passage is formed between the outer wall of the filter cartridge 7 and the inner wall of the shell 2, the annular flow passage is communicated with the water outlet 42 of the connecting part 4, and the lower end of the filter cartridge 7 is provided with a threaded opening 71. When the sewage outlet 21 is in a closed state, water flows through the water inlet 41 of the connecting part 4, is filtered by the water inlet filter cartridge 7 of the valve cover 1, and filtered clean water flows out through the water outlet 42 of the connecting part 4.

As shown in fig. 2 to 3, one end of a central shaft 5 of the prefilter of the present utility model is located in the filter flask, and the other end of the central shaft 5 passes through the valve cover 1; the plug 6 is positioned in the filter flask, and one end of the plug 6 is arranged opposite to the drain outlet 21. The other end of the central shaft lever 5 is movably connected with the valve cover 1, and the other end of the central shaft lever 5 is lifted, pressed or rotated positively and negatively so that one end of the central shaft lever 5 can drive the plug 6 to open the sewage outlet 21 or plug the sewage outlet 21.

As shown in fig. 1 to 4, the first driving end 52 located at the upper portion of the central shaft 5 passes through the valve cover 1 and is located above the valve cover 1, the second driving end 53 located at the lower portion of the central shaft 5 is located in the cavity of the filter cartridge 7, and the pre-filter further comprises a knob 3 fixedly connected to the first driving end 52 of the central shaft 5. The central shaft lever 5 has a tubular structure, and the central shaft lever 5 is provided with siphon openings 51 axially distributed along the central shaft lever 5, and the siphon openings 51 are arranged near the inner wall of the filter cartridge 7. The second driving end 53 of the central shaft 5 is provided with 4 guiding ribs 531 evenly distributed in the circumferential direction.

As shown in fig. 2, 3 and 5, the upper end of the plug 6 of the prefilter of the present utility model has a cylindrical structure, an external thread 61 is provided on the outer wall of the cylindrical structure, 4 guide grooves 63 are provided on the circumference of the inner wall of the cylindrical structure, a tapered structure 62 is provided at the lower end of the plug 6, the tapered structure 62 is fixed at the lower end of the cylindrical structure by a spoke structure, and the tapered structure 62 is disposed opposite to the drain 21 below.

The inner wall of the cylindrical structure of the plug 6 is sleeved on the second driving end 53 of the central shaft lever 5 so that the guide ribs 531 and the guide grooves 63 are in sliding fit along the axial direction of the central shaft lever 5; the external thread 61 of the plug 6 of cylindrical configuration cooperates with the threaded opening 71 to rotationally displace the plug 6 within the threaded opening 71. Thus, when the knob 3 drives the first driving end 52 of the central shaft 5 to rotate the central shaft 5, the guiding rib 531 on the second driving end 53 of the central shaft 5 is fixed with the guiding groove 63 in a limiting manner in the circumferential direction so as to drive the cylindrical structure of the plug 6 to rotationally displace in the threaded opening 71 of the filter cartridge 7, so that the plug 6 can move along the axial direction of the plug 6, the lower end of the plug 6 is far away from the open drain 21, or the lower end of the plug 6 abuts against the close drain 21.

Preferably, as shown in fig. 2 to 3, the valve cover 1 of the prefilter of the present utility model comprises an outer shell 11 of copper and an inner shell 12 of plastic. On the one hand, the front-end filter can effectively prevent heavy metals of the valve cover 1 from precipitating into water, and on the other hand, the structural strength of the front-end filter is also ensured, so that the safety of filtering purified water of the front-end filter is improved.

As shown in fig. 2, the front filter is in a normal filtering operation state, i.e., the water inlet 41 and the water outlet 42 of the connecting portion 4 are opened, and the tapered structure 62 at the lower end of the plug 6 seals the drain 21 of the housing 2. Raw water enters the cavity of the filter cartridge 7 through the water inlet 41 of the connecting part 4 for filtering, impurity particles in the raw water remain on the inner wall of the filter cartridge 7, and filtered purified water finally flows out from the water outlet 42 of the connecting part 4.

As shown in fig. 3, the pre-filter is in a normal flushing operation state, i.e., the water inlet 41 of the connection part 4 is opened, the water outlet 42 of the connection part 4 is closed, and the tapered structure 62 at the lower end of the plug 6 is away from the drain 21 of the housing 2. Raw water enters the cavity of the filter cartridge 7 through the water inlet 41 of the connecting part 4 to flush the inner wall of the filter cartridge 7, the flushing process is positive, the knob 3 is rotated so that the central shaft rod 5 drives the siphon port 51 to suck impurity particles on the inner wall of the filter cartridge 7 into the hollow flow passage of the central shaft rod 5, and the impurity particles are enabled to flow out of the drain outlet 21 rapidly downwards.

It will be appreciated by those skilled in the art that, although the foregoing embodiment describes the threaded displacement of the plug 6 within the filter cartridge 7 by the rotation of the central shaft 5 to open or close the drain 21, this is not limitative, but the skilled person can also lift or press the central shaft 5 to directly separate the plug 6 from the drain 21 or plug the drain 21 according to actual needs, and such flexible adjustment and modification do not deviate from the principle and scope of the present utility model and shall be limited to the protection scope of the present utility model.

Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will be within the scope of the present utility model.

Claims (10)

1. A pre-filter, comprising:

the valve cover (1) is provided with a connecting part (4) for communicating water inlet and outlet;

The lower end of the filter flask is provided with a drain outlet (21), and the upper end of the filter flask is connected with the valve cover (1) in a sealing way;

a central shaft lever (5) located inside the filter bottle, one end of the central shaft lever (5) passing through the top of the valve cover (1) and being located outside the valve cover (1); and

The plug (6) is positioned in the filter flask, and one end of the plug (6) is arranged opposite to the sewage outlet (21);

The central shaft rod (5) is movably connected with the valve cover (1), and one end of the central shaft rod (5) is pulled or rotated so that the other end of the central shaft rod (5) can drive the plug (6) to be away from the sewage outlet (21) or to be propped against to plug the sewage outlet (21).

2. The prefilter of claim 1, wherein the filter flask comprises a housing (2) and a filter cartridge (7) positioned in the housing (2), the drain outlet (21) is formed in the housing (2), a threaded opening (71) is formed in the bottom of the filter cartridge (7), an external thread (61) is formed in the circumference of the plug (6), and the other end of the central shaft (5) drives the plug (6) so that the external thread (61) is rotationally matched with the threaded opening (71) to drive the plug (6) to move along the axial direction of the central shaft (5).

3. The prefilter of claim 2, wherein the other end of the plug (6) has a tubular structure, the external thread (61) is formed on an outer wall of the tubular structure, a guide groove (63) is formed on an inner wall of the tubular structure, the tubular structure is sleeved on the other end of the central shaft (5), a guide rib (531) is circumferentially formed on the other end of the central shaft (5), and the guide rib (531) is slidably matched with the guide groove (63) along an axial direction of the central shaft (5).

4. A pre-filter according to claim 3, characterized in that the number of guide grooves (63) and guide ribs (531) is plural, the guide grooves (63) being uniformly distributed along the circumference of the inner wall of the cylindrical structure, and the guide ribs (531) being uniformly distributed along the circumference of the other end of the central shaft (5).

5. A pre-filter according to claim 3, characterized in that the central shaft (5) has a hollow tube structure communicating with the tubular structure, on which hollow tube structure siphon openings (51) are provided distributed axially along the central shaft (5).

6. The prefilter of claim 5, wherein said siphon port (51) is provided close to an inner wall of said filter cartridge (7).

7. The pre-filter according to claim 1, characterized in that it comprises a knob (3), said knob (3) being fixedly connected to one end of said central shaft (5).

8. The prefilter of claim 1, wherein the valve cover (1) comprises an outer shell (11) of copper and an inner shell (12) of plastic.

9. The prefilter of claim 1, wherein a movable joint (43) is provided between the connection (4) and the valve cap (1).

10. The prefilter of claim 1, wherein one end of the plug (6) has a tapered structure (62), the tapered structure (62) sealing off the drain (21).