Valve head and pre-filter

Abstract

The utility model relates to the technical field of filters, in particular to a valve head and a pre-filter. The valve head comprises a metal shell, a plastic nesting sleeve and two connecting pipes, the shell is provided with a cavity and comprises an assembling pipe and two water inlet and outlet pipes which are communicated with the cavity, the plastic nesting sleeve is installed in the cavity in an attached mode and provided with an assembling opening and two water inlet and outlet connectors, the assembling opening is connected into the assembling pipe in a sleeved mode, and the two connecting pipes are connected with the plastic nesting sleeve. The two connecting pipes are sleeved with the corresponding water inlet and outlet pipes respectively, and one ends of the two connecting pipes are connected with the corresponding water inlet and outlet connectors in a sealed and inserted mode respectively. The prefilter comprises the valve head, the two water inlet and outlet ports of the plastic nesting are matched with the two connecting pipes in an inserted mode to form a flow channel for water to pass through, a metal shell is isolated from water passing through the valve head, and the situation that heavy metal in water exceeds the standard due to the fact that the metal shell makes contact with the water to separate out the heavy metal is avoided; the water quality and safety of water passing through the valve head are improved, and meanwhile the filtering effect of the pre-filter is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a valve head and a pre-filter. Background Art

[0002] The pre-filter is usually installed at the front end of the pipeline and is the first coarse filtration device for the water end. The pre-filter is usually a "T"-shaped structure, specifically including a valve head and a filter bottle. The left and right ends of the valve head are respectively the water inlet and outlet. The bottom of the valve head is connected to the bottle mouth installed in the filter bottle. A cylindrical filter screen is installed in the bottle body of the filter bottle, and the bottom of the filter bottle is the sewage outlet. When in use, water flows from the water inlet of the valve head into the gap between the bottle body and the filter screen, and flows to the water outlet of the valve head after being filtered by the filter screen to achieve the first coarse filtration.

[0003] The existing pre-filter is made of metal materials. Metal materials are strong and easy to process. The valve head made of metal materials is not easy to damage or malfunction, and has a long service life. However, the inner surface of the metal valve head in contact with water for a long time will cause heavy metal precipitation. For example, the brass valve head is prone to lead precipitation, resulting in excessive heavy metals in the water, which is harmful to human health. If other non-metallic materials are considered to be used to make the valve head, the pressure bearing capacity and service life will not meet the design requirements of the pre-filter. Utility Model Content

[0004] The utility model aims to provide a valve head and a pre-filter to solve the technical problem in the prior art that heavy metals are precipitated when a metal valve head contacts water, resulting in excessive heavy metals in the water.

[0005] To achieve this purpose, the technical solution adopted by the utility model is:

[0006] The valve head includes a metal shell, a plastic nest and two connecting pipes, the shell has a cavity, the shell includes an assembly pipe and two water inlet and outlet pipes both connected to the cavity, the plastic nest is fitted in the cavity, the plastic nest is provided with an assembly port and two water inlet and outlet interfaces, the assembly port is sleeved in the assembly pipe, the two connecting pipes are respectively sleeved in the corresponding water inlet and outlet pipes, and one end of the two connecting pipes is respectively sealed and plugged with the corresponding water inlet and outlet interfaces.

[0007] As an optional solution for the valve head, the inner side wall of the water inlet and outlet interface is circumferentially provided with a stepped groove, and the first end of the connecting pipe is sealed and inserted into the corresponding stepped groove.

[0008] As an optional solution for the valve head, at the same water inlet and outlet interface, the axial end face of the stepped groove of the water inlet and outlet interface and the corresponding inner wall of the water inlet and outlet pipe form a first sealing groove, and a first sealing member is installed in the first sealing groove.

[0009] As an optional solution for the valve head, a first sealing member is installed between the inner wall of the stepped groove and the outer peripheral surface of the plug-fitting connecting pipe.

[0010] As an optional solution for the valve head, the second end of the connecting pipe is coplanar with and sealingly abuts against an axial end of the corresponding inlet and outlet water pipe away from the cavity.

[0011] As an optional solution for the valve head, a second sealing groove is circumferentially arranged on the inner wall of the axial end of the inlet and outlet pipe away from the cavity, a second sealing member is installed in the second sealing groove, and the second end of the connecting pipe is pressed against the second sealing member.

[0012] As an optional solution for the valve head, the second end of the connecting pipe is tilted outward to form a V-shaped opening, and the outer side wall of the large diameter end of the V-shaped opening is pressed against the second sealing member.

[0013] As an optional solution for the valve head, the housing further comprises an operating tube arranged opposite to the assembly tube, the plastic nest comprises a nesting body, two water inlet and outlet interfaces, the assembly port and a sleeve, the two water inlet and outlet interfaces are arranged opposite to each other on the nesting body, and the assembly port and the sleeve are arranged opposite to each other on the nesting body;

[0014] One end of the sleeve is coaxial with the operating tube and is in sealed communication with the operating tube, and the other end of the sleeve extends into the nested body.

[0015] As an optional solution for the valve head, the connecting pipe is a stainless steel pipe or a ceramic pipe.

[0016] The pre-filter comprises a filter bottle and the valve head, wherein the assembly pipe of the valve head is installed at the bottle mouth of the filter bottle.

[0017] The beneficial effects of the utility model are:

[0018] The valve head proposed by the utility model is installed in a cavity by plastic nesting, the assembly port of the plastic nesting is sleeved in the assembly pipe, the two connecting pipes of the plastic nesting are respectively sleeved in the corresponding inlet and outlet water pipes, and one end of the two connecting pipes is respectively sealed and plugged with the corresponding inlet and outlet water interfaces. The metal shell ensures that the valve head has good pressure bearing capacity and service life. At the same time, the two inlet and outlet water interfaces of the plastic nesting are respectively plugged and matched with the two connecting pipes to form a flow channel for water supply, isolating the shell from the water passing through the valve head, avoiding the precipitation of heavy metals when the metal shell contacts the water, resulting in excessive heavy metals in the water, and improving the water quality and safety of the water passing through the valve head.

[0019] The pre-filter proposed by the utility model includes the above-mentioned valve head, which isolates the metal shell from the water passing through the valve head, avoiding the metal shell from contacting with water and precipitating heavy metals, resulting in excessive heavy metals in the water, thereby improving the water quality and safety of the water passing through the valve head and ensuring the filtering effect of the pre-filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a valve head provided by an embodiment of the utility model;

[0021] Figure 2 It is a longitudinal cross-sectional view of the valve head provided by the embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the plastic nesting provided by the embodiment of the utility model;

[0023] Figure 4 It is a structural schematic diagram of a connecting pipe provided in an embodiment of the utility model.

[0024] The names and numbers of the components in the figure are as follows:

[0025] 1. Shell; 10. Cavity; 11. Assembly pipe; 12. Inlet and outlet pipes; 13. Operation pipe;

[0026] 2. Plastic nesting; 21. Nesting body; 22. Assembly port; 23. Water inlet and outlet interface; 231. Step groove; 24. Sleeve;

[0027] 3. Connecting pipe; 31. V-shaped mouth; 4. First sealing member; 5. Second sealing member; 6. Third sealing member; 7. Fourth sealing member; 8. Fifth sealing member. DETAILED DESCRIPTION

[0028] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0032] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0033] This embodiment proposes a pre-filter, which includes a filter bottle and a valve head, and the valve head is installed at the bottle mouth of the filter bottle. The pre-filter is generally installed at the front end of the pipeline, and the water in the pipeline enters the filter bottle through the valve head, and after being filtered by the filter net and other filtering components in the filter bottle, it flows out of the rear end of the pipeline from the valve head, so as to perform the first coarse filtration on the water at the water end.

[0034] The existing pre-filter is made of metal materials. Metal materials are strong and easy to process. The valve head made of metal materials is not easy to damage or malfunction, and has a long service life. However, the inner surface of the metal valve head in contact with water for a long time will cause heavy metal precipitation. For example, the brass valve head is prone to lead precipitation, resulting in excessive heavy metals in the water, which is harmful to human health. If other non-metallic materials are considered to be used to make the valve head, the pressure bearing capacity and service life will not meet the design requirements of the pre-filter.

[0035] To solve the above problems, Figure 1 and Figure 2 As shown, this embodiment also proposes a valve head, which is mainly used in the above-mentioned pre-filter. Of course, the valve head can also be used in other filters, which is not specifically limited here. Specifically, the valve head includes a metal shell 1, a plastic nest 2 and two connecting pipes 3, the shell 1 has a cavity 10, the shell 1 includes an assembly pipe 11 and two water inlet and outlet pipes 12 both connected to the cavity 10, the plastic nest 2 is fitted in the cavity 10, the plastic nest 2 is provided with an assembly port 22 and two water inlet and outlet interfaces 23, the assembly port 22 is sleeved in the assembly pipe 11, the two connecting pipes 3 are respectively sleeved in the corresponding water inlet and outlet pipes 12, and one end of the two connecting pipes 3 is respectively sealed and plugged with the corresponding water inlet and outlet interfaces 23. The metal shell 1 ensures that the valve head has good pressure-bearing capacity and service life. At the same time, the two water inlet and outlet interfaces 23 of the plastic nest 2 are respectively plugged into and matched with the two connecting pipes 3 to form a flow channel for water supply, thereby isolating the shell 1 from the water passing through the valve head, avoiding the precipitation of heavy metals when the metal shell 1 contacts the water, resulting in excessive heavy metals in the water, and improving the water quality and safety of the water passing through the valve head.

[0036] Specifically, Figure 1 and Figure 2 As shown, the shell 1 is a T-shaped structure, and two water inlet and outlet pipes 12 are symmetrically arranged on the left and right sides of the shell 1, and the outer circumference of the water inlet and outlet pipes 12 is provided with external threads so as to be threadedly connected with external pipelines. An assembly pipe 11 is arranged at the bottom of the shell 1, and the assembly pipe 11 is installed at the bottle mouth of the filter bottle. The bottom of the inner wall of the assembly pipe 11 has an internal thread so as to be threadedly connected with the bottle mouth. Specifically, the water inlet and outlet pipes 12 on the left are the water inlet pipes, and the water inlet and outlet pipes 12 on the right are the water outlet pipes. The pipeline at the front end is threadedly connected with the water inlet pipe, and the pipeline at the rear end is threadedly connected with the water outlet pipe. The inner wall of the assembly pipe 11 is provided with a third sealing groove around the circumference, and a third sealing member 6 is installed in the third sealing groove. The third sealing groove is located below the assembly port 22 to ensure the sealing effect between the assembly port 22 and the bottle mouth of the filter bottle.

[0037] In this embodiment, the plastic nest 2 is plugged and matched with the two connecting pipes 3 to form a flow channel for water to pass through, so as to isolate the housing 1 from the water passing through the valve head. Specifically, the plastic nest 2 is integrally formed by injection molding, which is convenient for processing and manufacturing. The plastic nest 2 includes a nest body 21, two water inlet and outlet interfaces 23 and an assembly port 22. The outer surface of the plastic nest 2 is adapted to the inner contour of the cavity 10, so that the plastic nest 2 can be tightly fitted and installed in the cavity 10, thereby improving the stability of the installation of the plastic nest 2. The two water inlet and outlet interfaces 23 are relatively arranged on the left and right sides of the nest body 21. The two water inlet and outlet interfaces 23 are respectively the water inlet located on the left side of the nest body 21 and the water outlet located on the right side of the nest body 21, and the assembly port 22 is located at the bottom of the nest body 21. The water inlet is extended toward the water inlet pipe, and the water outlet is extended toward the water outlet pipe. The assembly port 22 is sleeved in the assembly pipe 11, further improving the stability of the installation of the plastic nest 2.

[0038] When the pre-filter is opened, the water in the front pipe Figure 2 As shown by the middle arrow, the water enters the nested body 21 through the connecting pipe 3 and the water inlet on the left, then enters the filter bottle through the assembly port 22, and after being filtered by the filter bottle, flows through the water outlet and the connecting pipe 3 on the right to the pipeline at the rear end.

[0039] The connecting pipe 3 of this embodiment is a stainless steel pipe or a ceramic pipe. The ceramic pipe has the advantages of good environmental protection, safety and durability. Ceramic pipes usually use natural minerals as raw materials, do not contain harmful chemicals, and will not precipitate heavy metals into the water passing through the valve head. At the same time, the ceramic pipe has good heat resistance and corrosion resistance, and maintains long-term beauty and practicality. The stainless steel pipe has high structural strength and can withstand high water pressure. At the same time, it is clean, hygienic, safe and non-toxic, and will not affect the water quality. Of course, in other embodiments, the connecting pipe 3 can also be made of plastic material, such as food-grade ABS material.

[0040] like Figure 1 and Figure 2 As shown, the housing 1 also includes an operating tube 13 arranged opposite to the assembly tube 11, and the plastic nesting 2 also includes a sleeve 24. The assembly port 22 and the sleeve 24 are arranged opposite to each other on the nesting body 21 in the up-down direction. One end of the sleeve 24 is coaxial with the operating tube 13 and is sealed and connected, and the other end of the sleeve 24 extends into the nesting body 21. The top of the housing 1 has an operating tube 13, and the top of the nesting body 21 is correspondingly provided with a sleeve 24. The external valve stem passes through the operating tube 13 and the sleeve 24 in turn and is fixedly connected with the valve core extending into the filter bottle, so as to realize the opening and closing of the filter bottle by operating the valve stem. A fourth sealing member 7 is installed between the top of the sleeve 24 and the cavity 10 to keep the top of the sleeve 24, the housing 1 and the valve stem sealed. A fifth sealing member 8 is installed at the bottom of the sleeve 24 to keep the top of the sleeve 24 and the valve stem sealed.

[0041] like Figure 2 and Figure 3 As shown, the inner side wall of the water inlet and outlet interface 23 is provided with a stepped groove 231 around the circumference, and the first end of the connecting pipe 3 is sealed and plugged into the corresponding stepped groove 231. Specifically, the first end of the connecting pipe 3 on the left is plugged into the stepped groove 231 at the water inlet, and the first end of the connecting pipe 3 on the right is plugged into the stepped groove 231 at the water outlet. Through the one-to-one plug-in cooperation between the connecting pipe 3 and the stepped groove 231, the positioning installation of the two connecting pipes 3 is achieved, and the stability of the installation of the connecting pipe 3 is improved. In other embodiments, the inner side wall of the first end of the connecting pipe 3 can be provided with a stepped groove 231 around the circumference, and the first end of the connecting pipe 3 is sealed and sleeved on the corresponding water inlet and outlet interface 23.

[0042] Furthermore, at the same inlet and outlet water interface 23, the axial end surface of the inlet and outlet water interface 23 with the stepped groove 231 and the inner side wall of the corresponding inlet and outlet water pipe 12 form a first sealing groove, and a first sealing member 4 is installed in the first sealing groove. The first sealing member 4 realizes the sealing performance of the plug-in fitting of the inlet and outlet water pipe 12 and the corresponding inlet and outlet water interface 23, so as to ensure the sealing performance of the flow channel formed by the plug-in fitting of the plastic nest 2 and the two connecting pipes 3, thereby isolating the housing 1 from the water passing through the valve head, and preventing the metal housing 1 from contacting with the water.

[0043] Specifically, the first end of the left connecting pipe 3 is inserted into the stepped groove 231 at the water inlet, and a first sealing member 4 is installed in the corresponding first sealing groove and sleeved on the first end of the left connecting pipe 3. The first end of the right connecting pipe 3 is inserted into the stepped groove 231 at the water outlet, and another first sealing member 4 is installed in the corresponding first sealing groove and sleeved on the first end of the right connecting pipe 3.

[0044] In other embodiments, a first sealing member 4 is installed between the inner wall of the stepped groove 231 and the outer peripheral surface of the plug-fitting connecting pipe 3. By providing the first sealing groove on the inner wall of the stepped groove 231 or the outer peripheral surface of the connecting pipe 3, the first sealing member 4 is installed in the first sealing groove to ensure the sealing of the plug-fitting part between the inlet and outlet water pipes 12 and the corresponding inlet and outlet water interfaces 23.

[0045] like Figure 2 As shown, the second end of the connecting pipe 3 is coplanar and sealed with the axial end of the corresponding inlet and outlet pipe 12 away from the cavity 10. Through the above arrangement, the second end of the connecting pipe 3 is well sealed, avoiding a gap between the second end of the connecting pipe 3 and the axial end of the corresponding inlet and outlet pipe 12 away from the cavity 10, thereby preventing the water flow from contacting the housing 1, and ensuring the water quality and safety.

[0046] like Figure 2 and Figure 4 As shown, a second sealing groove is circumferentially arranged on the inner wall of the axial end of the inlet and outlet water pipe 12 away from the cavity 10, a second sealing member 5 is installed in the second sealing groove, and the second end of the connecting pipe 3 is pressed against the second sealing member 5. By providing the second sealing member 5, the sealing performance between the second end of the connecting pipe 3 and the inlet and outlet water pipe 12 is ensured. It should be noted that the first sealing member 4, the second sealing member 5, the third sealing member 6, the fourth sealing member 7 and the fifth sealing member 8 are all rubber sealing rings.

[0047] Preferably, the second end of the connecting pipe 3 is tilted outward to form a V-shaped opening 31, and the outer side wall of the large diameter end of the V-shaped opening 31 presses against the second sealing member 5. Specifically, the large diameter end of the V-shaped opening 31 is coplanar and sealed with the axial end of the corresponding inlet and outlet water pipe 12 away from the cavity 10. By providing the V-shaped opening 31, the contact area between the second end of the connecting pipe 3 and the second sealing member 5 is increased, and the sealing effect and installation stability of the second sealing member 5 are further improved.

[0048] The pre-filter of this embodiment includes the above-mentioned valve head, which isolates the metal shell 1 from the water passing through the valve head, thereby preventing the metal shell 1 from contacting with water and precipitating heavy metals, resulting in excessive heavy metals in the water, thereby improving the water quality and safety of the water passing through the valve head, and at the same time ensuring the filtering effect of the pre-filter.

[0049] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Valve head, characterized in that, The invention comprises a metal shell (1), a plastic nest (2) and two connecting pipes (3), wherein the shell (1) has a cavity (10), the shell (1) comprises an assembly pipe (11) and two water inlet and outlet pipes (12) both of which are in communication with the cavity (10), the plastic nest (2) is fitted in the cavity (10), the plastic nest (2) is provided with an assembly port (22) and two water inlet and outlet interfaces (23), the assembly port (22) is sleeved in the assembly pipe (11), the two connecting pipes (3) are respectively sleeved in the corresponding water inlet and outlet pipes (12), and one end of the two connecting pipes (3) is respectively sealed and plugged with the corresponding water inlet and outlet interfaces (23).

2. The valve head according to claim 1, characterized in that: The inner side wall of the water inlet and outlet interface (23) is provided with a stepped groove (231) in a circumferential direction, and the first end of the connecting pipe (3) is sealed and inserted into the corresponding stepped groove (231).

3. The valve head according to claim 2, characterized in that: At the same water inlet and outlet interface (23), the axial end surface of the water inlet and outlet interface (23) having the stepped groove (231) and the inner side wall of the corresponding water inlet and outlet pipe (12) form a first sealing groove, and a first sealing member (4) is installed in the first sealing groove.

4. The valve head according to claim 2, characterized in that: A first sealing member (4) is installed between the inner wall of the stepped groove (231) and the outer peripheral surface of the plug-fitting connecting pipe (3).

5. The valve head according to claim 1, characterized in that: The second end of the connecting pipe (3) is coplanar with and sealingly abuts against an axial end of the corresponding water inlet and outlet pipe (12) away from the cavity (10).

6. The valve head according to claim 5, characterized in that: A second sealing groove is circumferentially arranged on the inner wall of the axial end of the water inlet and outlet pipe (12) away from the cavity (10), a second sealing member (5) is installed in the second sealing groove, and the second end of the connecting pipe (3) is pressed against the second sealing member (5).

7. The valve head according to claim 6, characterized in that: The second end of the connecting pipe (3) is tilted outward to form a V-shaped opening (31), and the outer side wall of the large diameter end of the V-shaped opening (31) is pressed against the second sealing member (5).

8. The valve head according to any one of claims 1 to 7, characterized in that: The housing (1) further comprises an operating tube (13) arranged opposite to the assembly tube (11); the plastic nest (2) comprises a nest body (21), two water inlet and outlet interfaces (23), the assembly port (22) and a sleeve (24); the two water inlet and outlet interfaces (23) are arranged opposite to each other on the nest body (21); the assembly port (22) and the sleeve (24) are arranged opposite to each other on the nest body (21); One end of the sleeve (24) is coaxial with the operating tube (13) and is in sealed communication with the operating tube (13), and the other end of the sleeve (24) extends into the nested body (21).

9. The valve head according to any one of claims 1 to 7, characterized in that: The connecting pipe (3) is a stainless steel pipe or a ceramic pipe.

10. The pre-filter is characterized by: It comprises a filter bottle and a valve head according to any one of claims 1 to 9, wherein an assembly pipe (11) of the valve head is installed at the bottle mouth of the filter bottle.

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