Valve head structure with built-in check valve and pre-filter

Abstract

The valve head structure comprises a valve head provided with a water inlet channel, a water outlet channel and a filter bottle assembling port, a check valve assembling cavity is formed in the valve head, a check valve is arranged in the check valve assembling cavity, the check valve comprises a valve shell, a valve body and a check adjusting structure, and the valve shell is provided with a water inlet channel, a water outlet channel and a filter bottle assembling port. The check valve assembly cavity is formed in a water channel flowing from the center of the filter screen framework to a water outlet channel of the valve head, a check flow channel is formed in the valve shell, the valve body comprises a driving part and a check part, the check part is matched with the check flow channel, and the check adjusting structure is fixed to the driving part. And the non-return adjusting mechanism can drive the driving part to drive the non-return part to close or open the non-return flow channel under the action of water pressure in the prefilter. The check valve is simple in structure and easy to install, reliable check control is achieved when the front filter is used for discharging sewage, air is prevented from entering due to water return of the water outlet pipeline, and installation of other intelligent control components of the valve head is not affected.

Description

Technical Field

[0001] The utility model relates to a valve head structure with a built-in check valve and a pre-filter, belonging to the technical field of water purification equipment. Background Art

[0002] The mainstream external pressure pre-filter in the existing technology is a bottom-mounted filter bottle type, comprising a valve head, a filter bottle connected to the valve head at its upper end, and a drain ball valve connected to its lower end. A filter screen frame is installed within the filter bottle, and the outer wall of the filter screen frame is covered with a filter screen. During use, water flows from the water inlet of the valve head into the gap between the filter bottle and the filter screen, is filtered by the filter screen, flows into the center of the filter screen frame, and then flows from the center of the filter screen frame to the water outlet of the valve head. When sewage needs to be discharged, the drain ball valve at the lower end of the filter bottle is opened to achieve this. This structure has the potential for backflow of water in the outlet pipe during drainage, leading to the ingress of air, which requires a check valve structure.

[0003] A check valve is a valve, also known as a non-return valve or a reverse valve, whose main function is to prevent the fluid from flowing back in the pipeline. When the flow direction of the fluid in the pipeline changes, the check valve will automatically close to prevent the fluid from flowing back, thereby protecting the safety of the pipeline and equipment. The check valve in the existing technology is usually composed of a valve body, a valve cover, a valve seat and a sealing seat, and is installed in the water inlet pipe and the water outlet pipe. However, the space for the water inlet port and the water outlet port of the pre-filter valve head is limited, and in the pre-filter of the automated intelligent control, the valve head integrates the controller, drive motor and flow detection mechanism, etc., and the installation of conventional check valves is limited. There is extra space in the water path from the center of the filter mesh skeleton inside the valve head to the water outlet of the valve head to install the check valve structure. This utility model aims to provide a valve head structure with a built-in check valve that is more optimized and easier to install. The check valve is installed in the water path from the center of the filter mesh frame to the water outlet of the valve head. When the pre-filter is discharging sewage, it achieves reliable check and control, preventing the ingress of air due to water backflow in the water outlet pipe, without affecting the installation of other intelligent control components of the valve head. The utility model also aims to provide a pre-filter with a valve head structure with this built-in check valve. Utility Model Content

[0004] One of the purposes of the present invention is to solve the shortcomings of the pre-filter in the prior art and to provide a valve head structure with a more optimized structure and a built-in check valve that is easy to install. The check valve is arranged in the water path from the center of the filter mesh skeleton to the water outlet of the valve head, thereby realizing reliable check control without affecting the installation of other intelligent control components of the valve head.

[0005] A second object of the present invention is to provide a pre-filter with a valve head structure having a built-in check valve.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] The valve head structure with a built-in check valve includes a valve head with a water inlet channel, a water outlet channel and a filter bottle assembly port, a check valve assembly cavity is provided in the valve head, and a check valve is provided in the check valve assembly cavity. The check valve includes a valve shell, a valve body and a check adjustment structure. The check valve assembly cavity is provided in the water channel flowing from the center of the filter mesh skeleton to the water outlet channel of the valve head, a check flow channel is provided in the valve shell, and the valve body includes a driving part and a check part. The check part is adapted to the check flow channel, and the check adjustment structure is provided in the driving part. The check adjustment mechanism can drive the driving part to drive the check part to close or open the check flow channel under the action of the water pressure inside the pre-filter.

[0008] The utility model has a simple structure and is easy to install. It is set in the water path from the center of the filter screen skeleton to the water outlet of the valve head. When the front filter is discharging sewage, reliable backflow prevention control is realized to avoid the backflow of water in the water outlet pipe causing air to enter, and has little impact on the structure of the valve head of the existing technology and does not affect the installation of other intelligent control components of the valve head.

[0009] Preferably, it further comprises a valve seat, the valve housing is placed in the valve seat, a valve sleeve is provided between the valve seat and the valve housing, and the non-return portion opens or closes the non-return flow channel through the cooperation of the valve sleeve.

[0010] Preferably, a flow sensor is fixedly provided at the water outlet channel for obtaining water flow information of the water outlet channel.

[0011] Preferably, the flow sensor is a Hall-type flow sensor, including a magnetic induction impeller structure and a matching Hall sensor provided in the water outlet channel, and the Hall sensor can be electrically connected to the controller of the pre-filter.

[0012] Preferably, the water inlet channel and the water outlet channel are both provided with pressure sensors, and the pressure sensors can be electrically connected to the controller of the pre-filter.

[0013] Preferably, the valve housing is provided with a water inlet end and a non-return end, the non-return flow channel connects the water inlet end and the non-return end, an extrusion seal can be formed or released between the non-return end and the non-return part, and the non-return regulating mechanism controls the formation and release of the extrusion seal under the action of the water pressure inside the pre-filter, thereby closing or opening the non-return flow channel.

[0014] Preferably, the driving part is a valve stem, the non-return part is a valve plug, and the non-return adjustment structure is an elastic reset element. One end of the elastic reset element is fixed or abutted with the valve stem or valve plug, and the other end can be fixed or abutted with the valve head of the pre-filter. The valve plug can move axially under the action of the elastic reset element, thereby closing or opening the non-return flow channel.

[0015] Preferably, the valve plug is connected to the check valve assembly cavity in a sliding and sealing manner, and the valve head is further provided with a guide groove, and the end of the valve stem and the check valve adjustment structure are both arranged in the guide groove.

[0016] Preferably, the driving part is the valve stem, the non-return part is the valve plug, the non-return adjustment structure is an elastic reset element, one end of the elastic reset element is fixed or abutted with the valve stem or valve plug, and the other end is fixed or abutted with the valve seat, and the valve seat is provided with a guide hole for axial movement of the valve stem, and the valve plug can move axially under the action of the elastic reset element.

[0017] Preferably, the valve housing is provided with at least one limiting portion A at the water inlet end and at least one limiting portion B at the water outlet end. The limiting portion A is used to limit and fix the valve housing and the pre-filter valve head, and the limiting portion B is used to control the axial movement distance of the valve plug when closing the non-return flow channel, so as to fully form an extrusion seal.

[0018] Preferably, the limiting portion A is a limiting boss derived from the outer circumference, the limiting portion B is a limiting boss derived from the inner circumference, and the valve plug has a conical structure.

[0019] Preferably, the limiting portion A, the limiting portion B and the valve housing are integrally formed.

[0020] Preferably, the built-in check valve structure is further provided with a displacement sensor, and the driving part is further provided with a magnetic induction element, which can conduct the displacement sensor through magnetic force and send a check valve operation signal to the controller of the pre-filter.

[0021] Preferably, the water inlet channel, water outlet channel and filter bottle assembly port are provided with isolation bushings, and the isolation bushings, valve housing and valve body are made of inert materials or at least the side in contact with water is provided with an inert material coating, and the inert material is plastic, rubber or ceramic.

[0022] Preferably, the valve housing and the valve body are respectively integrally injection-molded using plastic or rubber materials; the isolation bushings include an inlet end isolation bushing, an outlet end isolation bushing and an assembly end isolation bushing, which are integrally injection-molded using plastic or rubber materials.

[0023] A prefilter comprises a valve head, a filter bottle, a filtering mechanism and a sewage discharge mechanism. The filter bottle is fixedly connected to an assembly port of the valve head and adopts the valve head structure.

[0024] The beneficial effects of the utility model are as follows: the utility model has a simple structure and is easy to install. It is arranged in the water path from the center of the filter screen skeleton to the water outlet of the valve head. When the pre-filter is discharging sewage, reliable backflow control is achieved to prevent the water from flowing back through the water outlet pipe and causing air to enter. The utility model has little impact on the structure of the valve head of the prior art and does not affect the installation of other intelligent control components of the valve head.

[0025] When the pre-filter is using water normally, the water outlet is opened, the water pressure compresses the elastic reset element, the valve body moves up, and the extrusion seal is released. When sewage needs to be discharged, the sewage valve is opened, the water pressure in the pre-filter is connected to the outside world, the water pressure is reduced, the elastic reset element is reset, and the valve body moves down until the extrusion seal is released. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is an exploded view of the utility model;

[0028] Figure 2 yes Figure 1 Partial exploded view;

[0029] Figure 3 yes Figure 1 Schematic diagram of the combination;

[0030] Figure 4 This is a schematic diagram of the use state of the utility model;

[0031] Figure 5 yes Figure 4 A partial cross-sectional view of

[0032] Figure 6 This is a cross-sectional view of the utility model in use (valve open state);

[0033] Figure 7 It is a cross-sectional view of the utility model in use state (valve closed state).

[0034] In the figure: 1. Valve housing, 11. Water inlet end, 12. Check end, 2. Valve body, 21. Valve stem, 22. Valve plug, 3. Check adjustment structure, 4. Valve seat, 5. Valve sleeve, 6. Limit part A, 7. Limit part B, 8. Displacement sensor, 9. Magnetic induction element, Valve head A, B. Check valve assembly chamber, C. Magnetic induction impeller structure, D. Hall sensor, E. Pressure sensor, F. Guide groove. DETAILED DESCRIPTION

[0035] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0037] In the description of this utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] Example 1

[0040] like Figure 1-7 As shown, the valve head structure with a built-in check valve includes a valve head A with a water inlet channel, a water outlet channel and a filter bottle assembly port, a check valve assembly chamber B is provided in the valve head A, and a check valve is provided in the check valve assembly chamber B, the check valve includes a valve shell 1, a valve body 2 and a check adjustment structure 3, the check valve assembly chamber B is provided in the water channel flowing from the center of the filter mesh skeleton to the water outlet channel of the valve head A, a check flow channel is provided in the valve shell 1, the valve body 2 includes a drive part and a check part, the check part is adapted to the check flow channel, the check adjustment structure 3 is provided in the drive part, and the check adjustment mechanism 3 can drive the drive part to drive the check part to close or open the check flow channel under the action of the water pressure inside the pre-filter.

[0041] In this embodiment, a valve seat 4 is further included. The valve housing 1 is placed in the valve seat 4. A valve sleeve 5 is provided between the valve seat 4 and the valve housing 1. The check portion cooperates with the valve sleeve 5 to open or close the check flow channel.

[0042] Specifically, a flow sensor is fixedly installed in the water outlet channel to obtain water flow information of the water outlet channel. The flow sensor adopts a Hall-type flow sensor, including a magnetic induction impeller structure C and an adapted Hall sensor D arranged in the water outlet channel. The Hall sensor D can be electrically connected to the controller of the pre-filter.

[0043] In this embodiment, the water inlet channel and the water outlet channel are both provided with a pressure sensor E, and the pressure sensor E can be electrically connected to the controller of the pre-filter.

[0044] Specifically, in this embodiment, the valve housing 1 is provided with a water inlet end 11 and a non-return end 12, the non-return flow channel connects the water inlet end 11 and the non-return end 12, an extrusion seal can be formed or released between the non-return end 12 and the non-return part, and the non-return regulating mechanism 3 controls the formation and release of the extrusion seal under the action of the water pressure inside the pre-filter, thereby closing or opening the non-return flow channel.

[0045] In this embodiment, the driving part is the valve stem 21, the non-return part is the valve plug 22, and the non-return adjustment structure 3 is an elastic reset element. One end of the elastic reset element is fixed or abutted with the valve stem 21 or the valve plug 22, and the other end can be fixed or abutted with the valve head A of the pre-filter. The valve plug 22 can move axially under the drive of the elastic reset element, thereby closing or opening the non-return flow channel.

[0046] Specifically, the valve head A is further provided with a guide groove F, in which the end of the valve stem 21 and the non-return regulating structure 3 are both provided.

[0047] As a parallel implementation scheme, the driving part is the valve stem 21, the non-return part is the valve plug 22, and the non-return adjustment structure 3 is an elastic reset element. One end of the elastic reset element is fixed or abutted with the valve stem 21 or the valve plug 22, and the other end is fixed or abutted with the valve seat 4. The valve seat 4 is provided with a guide hole 41 for axial movement of the valve stem 21, and the valve plug 22 can move axially under the drive of the elastic reset element.

[0048] The two aforementioned parallel schemes can also be used in combination to maximize the adjustment effect.

[0049] In this embodiment, the valve housing 1 is provided with at least one limiting portion A6 at the water inlet end 11, and at least one limiting portion B7 at the water outlet end 12. The limiting portion A6 is used to limit and fix the valve housing 1 and the pre-filter valve head A, and the limiting portion B7 is used to control the axial movement distance of the valve plug 22 when closing the non-return flow channel, so as to fully form an extrusion seal.

[0050] In this embodiment, the limiting portion A6 is a limiting boss derived from the outer circumference, the limiting portion B7 is a limiting boss derived from the inner circumference, and the valve plug 22 has a conical structure.

[0051] In this embodiment, the limiting portion A6 and the limiting portion B7 are integrally formed with the valve housing 1 .

[0052] In this embodiment, the built-in check valve structure is further provided with a displacement sensor 8, and the driving part is further provided with a magnetic induction element 9. The magnetic induction element 9 can conduct the displacement sensor 8 through magnetic force and send a check valve operation signal to the controller of the pre-filter.

[0053] In this embodiment, the water inlet channel, water outlet channel and filter bottle assembly port are provided with isolation bushings. The isolation bushings, valve housing 1 and valve body 2 are made of inert materials or at least the side in contact with water is provided with an inert material coating. The inert material is plastic, rubber or ceramic.

[0054] In this embodiment, the valve housing 1 and the valve body 2 are respectively integrally injection molded of plastic or rubber materials; the isolation bushings include an inlet end isolation bushing, an outlet end isolation bushing and an assembly end isolation bushing, which are integrally injection molded of plastic or rubber materials.

[0055] Example 2:

[0056] The prefilter comprises a valve head A, a filter bottle, a filtration mechanism, and a drain mechanism. The filter bottle is fixedly connected to the valve head assembly port and utilizes the aforementioned valve head structure, similar in structure to that of Example 1. When the prefilter is operating normally, the water outlet is open, and water pressure compresses the elastic reset element, causing valve body 2 to move upward and release the squeeze seal. When draining is required, the drain valve is opened, connecting the water pressure within the prefilter to the outside world. This reduces the water pressure, resets the elastic reset element, and causes valve body 2 to move downward until the squeeze seal is established.

[0057] The beneficial effects of the present invention are as follows: the present invention has a simple structure and is easy to install. It is arranged in the water path from the center of the filter mesh skeleton to the water outlet of the valve head. When the front filter discharges sewage, reliable backflow control is achieved to avoid the backflow of water in the water outlet pipe and cause air to enter. It has little impact on the structure of the valve head of the prior art and does not affect the installation of other intelligent control components of the valve head.

[0058] The embodiment described above is only a preferred solution of the present invention and does not limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A valve head structure with a built-in check valve, comprising a valve head (A) with a water inlet channel, a water outlet channel and a filter bottle assembly port, a check valve assembly cavity (B) being provided in the valve head (A), a check valve being provided in the check valve assembly cavity (B), the check valve comprising a valve housing (1), a valve body (2) and a check valve adjustment structure (3), characterized in that: The check valve assembly cavity (B) is provided in a water channel of a water outlet channel flowing from the center of the filter screen skeleton to the valve head (A); a check flow channel is provided in the valve housing (1); the valve body (2) comprises a driving portion and a check portion, the check portion being adapted to the check flow channel; a check adjustment structure (3) is provided in the driving portion; and the check adjustment structure (3) can drive the driving portion to drive the check portion to close or open the check flow channel under the action of water pressure inside the pre-filter.

2. The valve head structure with a built-in check valve according to claim 1, characterized in that: It also includes a valve seat (4), the valve housing (1) is placed in the valve seat (4), a valve sleeve (5) is provided between the valve seat (4) and the valve housing (1), and the non-return portion cooperates with the valve sleeve (5) to open or close the non-return flow channel.

3. The valve head structure with a built-in check valve according to claim 1, characterized in that: A flow sensor is fixedly provided at the water outlet channel to obtain water flow information of the water outlet channel.

4. The valve head structure with a built-in check valve according to claim 3, characterized in that: The flow sensor adopts a Hall-type flow sensor, which includes a magnetic induction impeller structure (C) arranged in the water outlet channel and an adapted Hall sensor (D). The Hall sensor (D) can be electrically connected to the controller of the pre-filter.

5. The valve head structure with a built-in check valve according to claim 1, 2, 3 or 4, characterized in that: The water inlet channel and the water outlet channel are both provided with a pressure sensor (E), and the pressure sensor (E) can be electrically connected to the controller of the pre-filter.

6. The valve head structure with a built-in check valve according to claim 1, 2, 3 or 4, characterized in that: The valve housing (1) is provided with a water inlet end (11) and a check end (12); a check flow channel connects the water inlet end (11) and the check end (12); an extrusion seal can be formed or released between the check end (12) and the check portion; and a check adjustment structure (3) controls the formation and release of the extrusion seal under the action of water pressure inside the pre-filter, thereby closing or opening the check flow channel.

7. The valve head structure with a built-in check valve according to claim 6, characterized in that: The driving part is a valve stem (21), the non-return part is a valve plug (22), and the non-return adjustment structure (3) is an elastic reset element. One end of the elastic reset element is fixed to or in contact with the valve stem (21) or the valve plug (22), and the other end is fixed to or in contact with the valve head (A). The valve plug (22) can move axially under the action of the elastic reset element.

8. The valve head structure with a built-in check valve according to claim 7, characterized in that: The valve head (A) is further provided with a guide groove (F), and the end of the valve stem (21) and the non-return regulating structure (3) are both arranged in the guide groove (F).

9. The valve head structure with a built-in check valve according to claim 2, characterized in that: The driving part is a valve stem (21), the non-return part is a valve plug (22), and the non-return adjustment structure (3) is an elastic reset element. One end of the elastic reset element is fixed to or in contact with the valve stem (21) or the valve plug (22), and the other end is fixed to or in contact with the valve seat (4). The valve seat (4) is provided with a guide hole (41) for axial movement of the valve stem (21), and the valve plug (22) can move axially under the action of the elastic reset element.

10. The valve head structure with a built-in check valve according to claim 1, 2, 3 or 4, characterized in that: The valve housing (1) is provided with at least one limiting portion A (6) at the water inlet end (11), and at least one limiting portion B (7) at the non-return end (12). The limiting portion A (6) is used to limit and fix the valve housing (1) and the valve head (A). The limiting portion B (7) is used to control the axial movement distance of the valve plug (22) when closing the non-return flow channel, so as to fully form an extrusion seal.

11. The valve head structure with a built-in check valve according to claim 10, characterized in that: The limiting portion A (6) is a limiting boss derived from the outer circumference, the limiting portion B (7) is a limiting boss derived from the inner circumference, and the valve plug (22) has a conical structure.

12. The valve head structure with a built-in check valve according to claim 11, characterized in that: The limiting portion A (6), the limiting portion B (7) and the valve housing (1) are integrally formed.

13. The valve head structure with a built-in check valve according to claim 1, 2, 3 or 4, characterized in that: The check valve is further provided with a displacement sensor (8), and the drive unit is further provided with a magnetic induction element (9). The magnetic induction element (9) can conduct the displacement sensor (8) through magnetic force and send a signal indicating the operation of the check valve to a controller of the pre-filter.

14. The valve head structure with a built-in check valve according to claim 1, 2, 3 or 4, characterized in that: The water inlet channel, the water outlet channel and the filter bottle assembly port are provided with an isolation bushing, and the isolation bushing, the valve housing (1) and the valve body (2) are made of an inert material or at least one side in contact with water is provided with an inert material coating, and the inert material is plastic, rubber or ceramic.

15. The valve head structure with a built-in check valve according to claim 14, characterized in that: The valve housing (1) and the valve body (2) are respectively integrally injection-molded using plastic or rubber materials; the isolation bushings comprise an inlet end isolation bushing, an outlet end isolation bushing, and an assembly end isolation bushing, which are integrally injection-molded using plastic or rubber materials.

16. A pre-filter, comprising a valve head, a filter bottle, a filtering mechanism and a sewage discharge mechanism, wherein the filter bottle is fixedly connected to the assembly port of the valve head, characterized in that: The valve head structure according to any one of claims 1 to 15 is adopted.

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