CN221061973U - 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 maintenance of the existing pre-filter is inconvenient. For this purpose, the prefilter of the present utility model comprises a valve head, a filter flask and a valve cartridge assembly. The filter bottle is communicated with the second flow passage, and is detachably connected with the valve head; the valve core assembly comprises a first cylinder body and a second cylinder body sleeved on the outer wall of the first cylinder body, the second cylinder body is arranged on the valve head, a through hole is formed in the first cylinder body, a diversion hole is formed in the second cylinder body, and a cavity of the first cylinder body is communicated with the first flow channel; the first cylinder rotates in the second cylinder to change the on-off state between the through hole and the diversion hole so as to enable the first flow passage to be communicated with the filter flask or the first flow passage to be communicated with the second flow passage or the first flow passage to be blocked. Through such setting, need not to close the total valve that intakes when changing the filter flask, improved the convenience of changing the maintenance filter flask.

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 arranged on the household water inlet main pipeline to realize primary filtration and purification of raw water. Usually, after the filter element material in the pre-filter reaches the service life, the filter element material needs to be updated and replaced to ensure the normal use of the pre-filter.

However, in the process of maintaining the prefilter, a user usually closes a main valve on a water inlet main pipeline so as to replace the filter element material of the prefilter, and meanwhile, closing the main valve also causes other water using equipment to be suspended, so that the prefilter is inconvenient to maintain and has poor user experience.

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 maintenance of the existing pre-filter is inconvenient.

In a first aspect, the present utility model provides a pre-filter comprising: a valve head having a first flow passage and a second flow passage therein; a filter flask in communication with the second flow passage, the filter flask being removably connected to the valve head; the valve core assembly comprises a first cylinder body and a second cylinder body sleeved on the outer wall of the first cylinder body, the second cylinder body is installed on the valve head, a through hole is formed in the first cylinder body, a diversion hole is formed in the second cylinder body, and a cavity of the first cylinder body is communicated with the first flow channel; the first cylinder body rotates in the second cylinder body to change the on-off state between the through hole and the diversion hole so as to enable the first flow passage to be communicated with the filter flask, or enable the first flow passage to be communicated with the second flow passage or enable the first flow passage to be plugged.

In the case of the preferable technical scheme of the pre-filter, the through holes comprise a first through hole and a second through hole, and the diversion holes comprise a first diversion hole and a second diversion hole; when the first flow channel is communicated with the filter flask, the first through hole is opposite to the first diversion hole, and the second through hole and the second diversion hole are staggered; when the first flow channel is communicated with the second flow channel, the first through hole and the first diversion hole are arranged in a staggered mode, and the second through hole and the second diversion hole are communicated.

In the case of the above-mentioned preferred technical solution of the prefilter, the first through hole and the second through hole are distributed in a staggered manner along the axial direction of the first cylinder, and the first deflector hole and the second deflector hole are distributed in a staggered manner along the axial direction of the second cylinder; the first through holes and the second through holes are all located on the same axial plane, the axial plane where the first diversion holes are located is perpendicular to the axial plane where the second diversion holes are located, or the first diversion holes and the second diversion holes are all located on the same axial plane, and the axial plane where the first through holes are located is perpendicular to the axial plane where the second through holes are located.

Under the condition of the preferable technical scheme of the pre-filter, the filter flask comprises a shell and a filter core material positioned in the shell, the water inlet end of the filter core material is communicated with the first flow channel through the first through hole and the first diversion hole, the water outlet end of the filter core material is communicated with the second flow channel, and the filter flask further comprises a one-way check valve positioned at the water outlet end of the filter core material.

Under the condition of the preferable technical scheme of the pre-filter, the valve head is provided with the clamping hook, the filter flask is provided with the clamping column, and the valve head is clamped and fixed with the filter flask by the clamping hook and the clamping column in a clamping fit manner.

Under the condition of the preferable technical scheme of the pre-filter, the clamping hook is provided with a fan-shaped structure, and the clamping hook rotates in the forward direction or in the reverse direction of the fan shaft of the fan-shaped structure on the valve head so as to fasten or loosen the clamping hook and the clamping column.

In the case of the preferred embodiment of the pre-filter described above, the pre-filter further includes a pressure relief valve mounted on the second flow passage of the valve head.

Under the condition of the preferable technical scheme of the pre-filter, the valve head is further provided with an installation cavity communicated with the first flow channel, the outer wall of the second cylinder body is provided with three annular steps, the three annular steps are in sealing fit with the inner wall of the installation cavity to form a first annular diversion trench and a second annular diversion trench, the first diversion hole is positioned in the first annular diversion trench, and the second diversion hole is positioned in the second annular diversion trench.

In the case of the preferred technical solution of the prefilter described above, the valve element assembly further comprises a sealing ring, which is located between the annular step and the inner wall of the installation chamber.

In the case of the above-mentioned preferred technical solution of the prefilter, the prefilter further includes a driving device, and one end of the first cylinder is fixedly connected with a rotating end of the driving device.

Those skilled in the art will appreciate that the prefilter of the present utility model includes a valve head, a filter flask, and a valve cartridge assembly. The filter bottle is communicated with the second flow passage, and is detachably connected with the valve head; the valve core assembly comprises a first cylinder body and a second cylinder body sleeved on the outer wall of the first cylinder body, the second cylinder body is arranged on the valve head, a through hole is formed in the first cylinder body, a diversion hole is formed in the second cylinder body, and a cavity of the first cylinder body is communicated with the first flow channel; the first cylinder rotates in the second cylinder to change the on-off state between the through hole and the diversion hole so as to enable the first flow passage to be communicated with the filter flask or the first flow passage to be communicated with the second flow passage or the first flow passage to be blocked. Through such setting, when changing the filter flask, only need with first runner and second runner intercommunication or with first runner shutoff, need not to close the total valve of intaking, improved the convenience of changing the maintenance filter flask.

Further, the filter flask includes the casing and is located the filtration core material of casing, and the water inlet end of filtration core material is through first through-hole and first water conservancy diversion hole and first runner intercommunication, and the play water end of filtration core material is communicated with the second runner, and the filter flask still includes one-way check valve, and one-way check valve is located the play water end of filtration core material. When the first flow passage is communicated with the second flow passage, the one-way check valve can prevent water flow from flowing back into the filter flask.

Further, the valve head is provided with a clamping hook, the filter flask is provided with a clamping column, and the clamping hook is matched with the clamping column in a clamping manner to fix the valve head and the filter flask in a clamping manner. The hook has a fan-shaped structure, and the hook rotates forward or reversely on the fan shaft of the fan-shaped structure so as to fasten or loosen the hook and the clamping column. Through such arrangement, the user is facilitated to hold and rotate the hook.

Further, the pre-filter further comprises a pressure relief valve mounted on the second flow passage of the valve head. Through such setting, when first runner shutoff state, press the relief valve and be convenient for reduce the pressure in the filter flask, avoid dismantling the water in the in-process filter flask and splash or blowout.

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 conditions at A-A in FIG. 1;

FIG. 3 is a schematic diagram of the water flow condition at B-B in FIG. 1;

FIG. 4 is a second schematic diagram of the water flow state at B-B in FIG. 1;

FIG. 5 is a schematic view of the structure of the first cylinder of the present utility model;

fig. 6 is a schematic diagram of an assembly structure of a first cylinder and a second cylinder according to the present utility model.

List of reference numerals:

1. A valve head; 11. a water inlet port; 110. a first flow passage; 12. a water outlet interface; 120. a second flow passage; 2. a filter flask; 21. a clamping column; 22. a housing; 23. a filter core; 24. a one-way check valve; 25. a gap flow channel; 26. a central flow passage; 3. a valve core assembly; 31. a first cylinder; 311. a first through hole; 312. a second through hole; 313. a driving end; 32. a second cylinder; 321. a first deflector aperture; 322. a second deflector aperture; 323. an annular step; 33. a seal ring; 4. a pressure release valve; 5. a hook.

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", "left", "right", "inner", "outer", and the like, which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings, are merely for convenience of description, and do not indicate or imply that devices or elements 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.

As shown in fig. 1 to 6, the prefilter of the present utility model includes a valve head 1, a filter flask 2, and a valve cartridge assembly 3. The valve head 1 comprises a water inlet joint 11 and a water outlet joint 12, and a first flow passage 110 communicated with the water inlet joint 11, a second flow passage 120 communicated with the water outlet joint 12 and a mounting cavity communicated with the first flow passage 110 are arranged in the valve head 1. The water inlet is communicated with the first flow passage 110 through the water inlet interface 11, and the downstream water using equipment is communicated with the second flow passage 120 through the second interface; wherein, the pipeline of intaking is equipped with the total valve of intaking (not shown in the figure).

As shown in fig. 1, a filter flask 2 of the prefilter of the present utility model is detachably connected to a valve head 1. Specifically, the filter flask 2 includes a housing 22 and a filter core 23 disposed in the housing 22, wherein a water inlet end of the filter core 23 is communicated with the first flow channel 110 through the valve core assembly 3, and a water outlet end of the filter core 23 is communicated with the second flow channel 120. The filter flask 2 also comprises a one-way check valve 24, and the one-way check valve 24 is positioned at the water outlet end of the filter core material 23. The filter core 23 may be a PP cotton filter core or an activated carbon composite core. A clearance flow passage 25 is provided between the filter core 23 and the inner wall of the housing 22, the filter core 23 has a center flow passage 26, the center flow passage 26 communicates with the second flow passage 120, and a one-way check valve 24 is fixed to the valve head 1 and is located at the upper end of the center flow passage 26 of the filter core 23. In the state that the water flow in the first flow channel 110 enters the second flow channel 120, the one-way check valve 24 can prevent the water flow from reversely flowing back into the filter flask 2, so that the filter core 23 can be replaced conveniently.

As shown in fig. 1, a hook 5 is arranged on a valve head 1 of a pre-filter of the utility model, a clamping column 21 is arranged on a filter flask 2, and the valve head 1 and the filter flask 2 are clamped and fixed by the clamping cooperation of the hook 5 and the clamping column 21. Specifically, two hooks 5 which are horizontally and bilaterally symmetrical are arranged on the valve head 1, the hooks 5 are of a fan-shaped structure, two clamping columns 21 which are axially and symmetrically arranged are arranged at the upper end of the shell 22, and the clamping columns 21 are arranged along the horizontal direction.

When the clamping hook 5 on the valve head 1 rotates anticlockwise (rotates positively) along the fan axis in the horizontal direction of the fan-shaped structure, the clamping hook 5 is tightly matched with the clamping column 21 to fix the lower end of the valve head 1 on the filter flask 2; when the hook 5 on the valve head 1 rotates anticlockwise (rotates reversely) along the fan axis in the horizontal direction of the fan-shaped structure, the hook 5 and the clamping column 21 are loosened to detach the filter flask 2 from the valve head 1. By such arrangement, the convenience of disassembly between the valve head 1 and the filter flask 2 is improved.

As shown in fig. 2 to 6, the valve core assembly 3 of the present utility model includes a first cylinder 31 and a second cylinder 32 sleeved on the outer wall of the first cylinder 31, the second cylinder 32 being installed in an installation chamber on the valve head 1. Wherein, the first cylinder 31 is provided with through holes 311 and 312 and a driving end 313 positioned at one end of the first cylinder 31, the second cylinder 32 is provided with guide holes 321 and 322, and the cavity of the first cylinder 31 is communicated with the first runner 110; the first cylinder 31 rotates in the second cylinder 32 to change the on-off state between the through hole and the diversion hole so as to enable the first flow passage 110 to be communicated with the filter flask 2 or enable the first flow passage 110 to be communicated with the second flow passage 120 or enable the first flow passage 110 to be blocked.

As shown in fig. 5 and 6, the through holes 311, 312 of the first cylinder 31 of the present utility model include a first through hole 311 and a second through hole 312, and the diversion holes 321, 322 of the second cylinder 32 include a first diversion hole 321 and a second diversion hole 322; when the first flow channel 110 is communicated with the filter flask 2, the first through hole 311 is arranged opposite to the first diversion hole 321, and the second through hole 312 is arranged in a staggered manner with the second diversion hole 322; when the first flow channel 110 is communicated with the second flow channel 120, the first through hole 311 and the first diversion hole 321 are arranged in a staggered manner, and the second through hole 312 and the second diversion hole 322 are arranged in a communicated manner.

Specifically, the first through holes 311 and the second through holes 312 on the first cylinder 31 are distributed in a staggered manner along the axial direction of the first cylinder 31, and the first through holes 311 and the second through holes 312 are located on the same axial plane. The first guide holes 321 and the second guide holes 322 are distributed along the axial direction of the second cylinder 32 in a staggered manner; wherein, the axial plane of the first diversion hole 321 is perpendicular to the axial plane of the second diversion hole 322.

As shown in fig. 6, three annular steps 323 are uniformly arranged on the outer wall of the second cylinder 32 at intervals, the three annular steps 323 are in sealing fit with the inner wall of the installation cavity on the valve head 1 to form a first annular diversion trench and a second annular diversion trench, the first diversion hole 321 is positioned in the first annular diversion trench, and the second diversion hole 322 is positioned in the second annular diversion trench. When the first through hole 311 is opposite to the first diversion hole 321, the water flow in the first flow channel 110 flows into the filter flask 2 through the first through hole 311, the first diversion hole 321 and the first annular diversion trench. When the second through hole 312 is opposite to the second diversion hole 322, the water flow in the first flow channel 110 flows into the second flow channel 120 through the second through hole 312, the second diversion hole 322 and the second annular diversion groove.

It should be noted that, in practical applications, those skilled in the art may set the first diversion hole 321 and the second diversion hole 322 on the same axial plane, where the axial plane of the first through hole 311 is perpendicular to the axial plane of the second through hole 312, and the relative positional relationship between the through holes 311, 312 on the first cylinder 31 and the diversion holes 321, 322 on the second cylinder 32 is flexibly adjusted and changed without departing from the principle and scope of the present utility model, which should be limited in the scope of the present utility model.

As shown in fig. 1 to 5, the valve cartridge assembly 3 of the present utility model further includes a seal ring 33, the seal ring 33 being located between the annular step 323 and the inner wall of the installation chamber. Specifically, the number of the seal rings 33 is three, and each seal ring 33 is respectively fitted around the circumferential direction of the annular step 323. Water is prevented from seeping out through a gap between the annular step 323 and the inner wall of the mounting cavity, and the sealing use safety of the valve core assembly 3 is improved.

Preferably, the inventive prefilter further comprises a drive means, the drive end 313 of the first cylinder 31 being fixedly connected to the rotational end of the drive means.

Illustratively, one end of the first cylinder 31 of the present utility model has a D-shaped groove (not shown), the driving device is a wrench (not shown), one end of the wrench is provided with a D-shaped boss (not shown) that mates with the D-shaped groove, the D-shaped boss of the wrench extends into the D-shaped groove at one end of the first cylinder 31, and the wrench is rotated to rotate the first cylinder 31 in the second cylinder 32 to different working positions.

It should be noted that, in practical applications, those skilled in the art may also set the driving device as a stepper motor, where an output shaft of the stepper motor is fixedly connected to the driving end 313 of the first cylinder 31, and such flexible adjustment and modification of the driving device do not deviate from the principle and scope of the present utility model, which should be limited to the protection scope of the present utility model.

As shown in fig. 1 and 2, the prefilter of the present utility model further comprises a relief valve 4, the relief valve 4 being mounted on the second flow passage 120 of the valve head 1.

After switching the first cylinder 31 to the first flow passage 110 to block, the pressure release valve 4 is pressed to lower the water pressure in the filter flask 2 so that the valve head 1 and the filter flask 2 are safely removed and replaced.

When the pre-filter works normally, as shown in fig. 2, the first cylinder 31 rotates in the second cylinder 32 to a first working position by means of the driving device, that is, when the first through hole 311 on the first cylinder 31 is communicated with the first diversion hole 321 on the second cylinder 32, the second through hole 312 on the first cylinder 31 is disconnected with the second diversion hole 322 on the second cylinder 32 in a dislocation manner. In this state, the raw water flow enters the first cylinder 31 through the first flow passage 110, sequentially passes through the first through hole 311, the first flow guide hole 321 and the first annular flow guide groove, and enters the gap flow passage 25 in the filter bottle 2, and the purified water filtered by the raw water through the filter core 23 passes through the central flow passage 26 of the filter core 23, passes through the one-way check valve 24 and then flows out through the second flow passage 120.

When the filter core 23 is replaced and the inlet main valve is not closed for the prefilter, as shown in fig. 3, the first cylinder 31 is rotated in the second cylinder 32 to the second working position by the driving device, that is, when the second through hole 312 on the first cylinder 31 is relatively communicated with the second diversion hole 322 on the second cylinder 32, the first through hole 311 on the first cylinder 31 is dislocated and disconnected from the first diversion hole 321 on the second cylinder 32. At this time, in this state, raw water flow enters the first cylinder 31 through the first flow channel 110, and flows into the second flow channel 120 through the second through hole 312, the second flow guide hole 322 and the second annular flow guide groove in sequence, so that the water of downstream equipment is ensured without closing the water inlet main valve, and the filter flask 2 can be detached and replaced at the same time, thereby improving the convenience of replacing and maintaining the filter flask 2.

When the filter core 23 is replaced without closing the main valve in the water inlet main pipe, as shown in fig. 4, the first cylinder 31 is rotated in the second cylinder 32 to the third working position by the driving device, that is, the first through hole 311 in the first cylinder 31 is dislocated and disconnected from the first diversion hole 321 in the second cylinder 32, and the second through hole 312 in the first cylinder 31 is dislocated and disconnected from the second diversion hole 322 in the second cylinder 32. In this state, the raw water enters the first cylinder 31 through the first flow passage 110 and is blocked, and the filter flask 2 can be replaced and maintained without closing the inlet main valve.

That is, when the filter flask 2 is replaced, the first flow passage 110 can be communicated with the second flow passage 120 or the first flow passage 110 can be blocked, the water inlet main valve does not need to be closed, and the convenience of replacing and maintaining the filter flask 2 is improved.

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:

A valve head (1) having a first flow passage (110) and a second flow passage (120) therein;

-a filter flask (2) in communication with the second flow channel (120), the filter flask (2) being detachably connected to the valve head (1); and

The valve core assembly (3) comprises a first cylinder body (31) and a second cylinder body (32) sleeved on the outer wall of the first cylinder body (31), the second cylinder body (32) is installed on the valve head (1), through holes (311, 312) are formed in the first cylinder body (31), guide holes (321, 322) are formed in the second cylinder body (32), and a cavity of the first cylinder body (31) is communicated with the first flow channel (110);

Wherein the first cylinder (31) rotates in the second cylinder (32) to change the on-off state between the through holes (311, 312) and the diversion holes (321, 322) so as to enable the first flow channel (110) to be communicated with the filter flask (2) or enable the first flow channel (110) to be communicated with the second flow channel (120) or enable the first flow channel (110) to be blocked.

2. The pre-filter according to claim 1, wherein the through holes (311, 312) comprise a first through hole (311) and a second through hole (312), the pilot holes (321, 322) comprise a first pilot hole (321) and a second pilot hole (322); when the first flow channel (110) is communicated with the filter flask (2), the first through hole (311) is arranged opposite to the first diversion hole (321), and the second through hole (312) is arranged in a staggered manner with the second diversion hole (322); when the first flow channel (110) is communicated with the second flow channel (120), the first through hole (311) and the first diversion hole (321) are arranged in a staggered mode, and the second through hole (312) and the second diversion hole (322) are arranged in a communicated mode.

3. The prefilter of claim 2, wherein the first through hole (311) and the second through hole (312) are distributed in an axial offset along the first cylinder (31), and the first deflector hole (321) and the second deflector hole (322) are distributed in an axial offset along the second cylinder (32); the first through holes (311) and the second through holes (312) are all located on the same axial plane, the axial plane where the first diversion holes (321) are located is perpendicular to the axial plane where the second diversion holes (322) are located, or the first diversion holes (321) and the second diversion holes (322) are located on the same axial plane, and the axial plane where the first through holes (311) are located is perpendicular to the axial plane where the second through holes (312) are located.

4. The prefilter of claim 2, wherein the filter flask (2) comprises a housing (22) and a filter core (23) located in the housing (22), a water inlet end of the filter core (23) is communicated with the first flow channel (110) through the first through hole (311) and the first diversion hole (321), a water outlet end of the filter core (23) is communicated with the second flow channel (120), the filter flask (2) further comprises a one-way check valve (24), and the one-way check valve (24) is located at the water outlet end of the filter core (23).

5. The prefilter of claim 1, wherein the valve head (1) is provided with a hook (5), the filter flask (2) is provided with a clamping column (21), and the hook (5) is in clamping fit with the clamping column (21) to fix the valve head (1) and the filter flask (2) in clamping fit.

6. The prefilter of claim 5, wherein the hook (5) has a fan-shaped structure, and the hook (5) rotates in a forward direction or in a reverse direction on the valve head (1) with a fan axis of the fan-shaped structure to fasten or unfasten the hook (5) to or from the hook post (21).

7. The pre-filter according to claim 1, further comprising a pressure relief valve (4), the pressure relief valve (4) being mounted on the second flow passage (120) of the valve head (1).

8. The prefilter of claim 2, wherein the valve head (1) further has a mounting chamber in communication with the first flow channel (110), the outer wall of the second cylinder (32) is provided with three annular steps (323), the three annular steps (323) form a first annular flow guide groove and a second annular flow guide groove in sealing fit with the inner wall of the mounting chamber, the first flow guide hole (321) is located in the first annular flow guide groove, and the second flow guide hole (322) is located in the second annular flow guide groove.

9. The prefilter of claim 8, wherein the valve cartridge assembly (3) further comprises a sealing ring (33), the sealing ring (33) being located between the annular step (323) and an inner wall of the mounting chamber.

10. The prefilter of claim 1, further comprising a drive means, wherein one end of the first cylinder (31) is fixedly connected to a rotational end of the drive means.