Pre-filter valve head and filter

Abstract

The utility model discloses a pre-filter valve head and a filter, and relates to the technical field of filters, the pre-filter valve head comprises a PPR valve seat at least comprising a connecting end; the metal tooth pattern sleeve is arranged on the periphery of the connecting end, and first metal tooth patterns are arranged on the periphery of the metal tooth pattern sleeve; an annular convex rib is arranged on the connecting piece; the locking nut is provided with internal threads matched with the first metal thread threads, and the end of the locking nut is in axial limiting clamping connection with the side, away from the metal thread sleeve, of the annular convex rib; and the metal thread sleeve is fixedly arranged on the periphery of the connecting end, or the metal thread sleeve is axially clamped with the connecting end in a limiting manner at least in the moving direction facing the annular convex rib. The metal thread sleeve and the PPR valve seat are connected in an injection molding mode or a clamping mode or other modes, it is guaranteed that metal threads are formed in the connecting positions of the valve head, and therefore the high connecting pressure can be borne, meanwhile, the good lead isolation effect is achieved, the manufacturing process is simpler, and the manufacturing cost is lower.

Description

Technical Field

[0001] This application relates to the field of filter technology, and in particular to a pre-filter valve head and filter. Background Technology

[0002] A pre-filter is the first coarse filtration device for the whole house's water supply. It can filter out sediment, rust, and large particles from tap water. It prevents the large amount of sediment and impurities generated in urban and residential water supply networks from causing harm to the human body, and also plays a positive pre-protective role in concealed pipes, faucets, plumbing, water heaters, boilers, central air conditioning, washing machines, dishwashers, coffee machines, and other water appliances (water purifiers, reverse osmosis systems, water softeners).

[0003] The valve heads of existing pre-filters are all made of metal, especially the lead-proof (copper-clad plastic) valve heads. Plastic is also injected into the copper valve seat to isolate heavy metals, which is costly and complicated to manufacture. Ordinary plastic valve heads cannot withstand high-pressure environments and will break, causing losses to users.

[0004] Therefore, in view of the above-mentioned technical problems, how to provide a valve head with strong thread pressure resistance, good lead isolation effect and low manufacturing cost is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this application is to provide a pre-filter valve head and filter. By adding metal threads to the connection end of the PPR valve seat, the connection strength at the connection point with the PPR valve seat is ensured, the manufacturing cost is reduced, and it also has a better lead-blocking effect.

[0006] To achieve the above objectives, this application provides a pre-filter valve head, comprising:

[0007] PPR valve seat, including at least one connection end;

[0008] A metal threaded sleeve is disposed on the outer periphery of the connecting end, and the outer periphery of the metal threaded sleeve is provided with a first metal thread;

[0009] The connector is provided with annular ribs;

[0010] The locking nut has an internal thread that mates with the first metal threaded thread, and the end of the locking nut is axially limited and engaged with the annular rib on the side away from the metal threaded sleeve.

[0011] Wherein, the metal threaded sleeve is fixedly disposed on the outer periphery of the connecting end, or,

[0012] The metal threaded sleeve is axially locked and engaged with the connecting end at least in the direction of movement facing the annular rib.

[0013] Preferably, the connecting end has an annular groove on its outer periphery, and a retaining ring is engaged in the annular groove. The outer diameter of the retaining ring is larger than the outer diameter of the connecting end. The metal threaded sleeve has an annular shoulder that is axially limited and engaged with the retaining ring. The annular shoulder is located on the side of the retaining ring away from the annular rib, so as to restrict the metal threaded sleeve from moving axially toward the annular rib.

[0014] Preferably, the connecting end has a polygonal outer wall, and the metal threaded sleeve has a polygonal inner wall that mates with the polygonal outer wall, so as to restrict the metal threaded sleeve from moving relative to the connecting end in the circumferential direction.

[0015] Preferably, the connector includes a connector head extending into the connecting end, the connector head having an annular groove on its outer periphery, and a sealing ring being provided in the annular groove, the sealing ring being in sealing contact with the inner wall of the connecting end.

[0016] Preferably, the outer diameter of the annular rib is larger than the outer diameter of the connector, and a sealing gasket is sandwiched between the annular rib and the connector end, the sealing gasket being sleeved on the outer periphery of the connector.

[0017] Preferably, the connector is a PPR heat fusion joint, and there are two connector ends, which correspond to the inlet and outlet of the PPR valve seat, respectively.

[0018] A filter comprising:

[0019] The valve head, as described above, is a pre-filter valve head, including a PPR valve seat, on which a filter end communicating with a liquid channel is provided;

[0020] A filter assembly is located at the filter end.

[0021] Preferably, the filter assembly includes a filter bottle, a metal threaded insert is embedded in the inner wall of the filter end, the inner wall of the metal threaded insert is provided with a second metal thread, the end of the filter bottle extends into the filter end, and a third metal thread that cooperates with the second metal thread is provided on the outer periphery of the extended end.

[0022] Preferably, the filter bottle contains a filter element, and the drain port of the filter bottle is equipped with a ball valve, which is sealed to the drain port through a sealing element.

[0023] Preferably, the device further includes a pressure gauge disposed on the PPR valve seat, the pressure gauge being used to monitor the fluid pressure in the liquid channel, the pressure gauge being connected to the PPR valve seat via a metal insert, the metal insert being injection molded to the PPR valve seat.

[0024] Compared to the aforementioned background technology, this application provides a metal threaded sleeve on the outer periphery of the PPR valve seat's connecting end. This metal threaded sleeve can be fixedly connected to the connecting end, for example, through injection molding, or by axially locking the metal threaded sleeve to the connecting end, thus ensuring a stable connection support effect. An annular rib is provided on the connector, which can be an adapter for connecting to household pipes, etc. The end of the locking nut is axially locked to the side of the annular rib away from the metal threaded sleeve, allowing the connector to move towards the connecting end by rotating the locking nut, thereby achieving a stable connection. This application, by connecting the metal threaded sleeve and the PPR valve seat through injection molding or locking, ensures that all connections at the valve head are metal threads, thus withstanding higher connection pressures. Furthermore, compared to traditional metal valve heads, the PPR valve seat has excellent lead-free properties, a simpler manufacturing process, and lower production costs. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the pre-filter valve head structure provided in an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the PPR valve seat structure provided in the embodiments of this application;

[0028] Figure 3 This is a schematic diagram of the external structure of the PPR valve seat provided in the embodiments of this application;

[0029] Figure 4 This is a cross-sectional view of the connector provided in an embodiment of this application;

[0030] Figure 5 This is a cross-sectional view of the metal thread sleeve provided in an embodiment of this application;

[0031] Figure 6 This is a schematic diagram of the injection molding connection structure between the PPR valve seat and the metal threaded sleeve provided in the embodiments of this application;

[0032] Figure 7 This is a schematic diagram of the filter state provided in the embodiments of this application;

[0033] Figure 8 This is a schematic diagram of the filter discharge status provided in the embodiments of this application.

[0034] In the diagram: 1-PPR valve seat; 101-liquid passage; 102-annular groove; 103-polygonal outer wall;

[0035] 2-Metal thread sleeve; 201-First metal thread; 202-Annular shoulder; 203-Polygonal inner wall;

[0036] 3-Connector; 301-Annular rib; 302-Connector head; 303-Annular groove;

[0037] 4- Lock nut;

[0038] 5-Clasp;

[0039] 6-Sealing gasket;

[0040] 7-Metal threaded insert;

[0041] 8-Filter assembly; 801-Filter bottle; 802-Filter element; 803-Seal; 804-Ball valve;

[0042] 9-Metal inserts;

[0043] 10-Pressure gauge. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] It should be noted that in this embodiment, the orientation or positional relationship indicated by terms such as "upper," "lower," "front," and "rear" is based on the orientation or positional relationship shown in the accompanying drawings. It is used only for the convenience of describing this application and for simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] like Figure 1As shown, in this embodiment, a pre-filter valve head is provided, including a PPR valve seat 1 (a valve seat made of type 3 polypropylene), a metal threaded sleeve 2, a connector 3, and a locking nut 4. The PPR valve seat 1 includes at least one connection end, which can be a liquid inlet end, a liquid outlet end, a filter end, or other ports that need to be connected to other components.

[0048] A metal threaded sleeve 2 is fitted around the outer periphery of the connecting end, and the outer periphery of the metal threaded sleeve 2 is provided with a first metal thread 201. Since the connecting end can be a variety of types of connecting ports, the connecting part 3 should also be a connecting component corresponding to the connecting port. For example, when the connecting end is a liquid inlet end and a liquid outlet end, the corresponding connecting part 3 should be an adapter in a liquid supply pipeline (such as a household water pipe). For another example, when the connecting end is a filter end, the corresponding connecting part 3 should be a filter assembly 8. When the connecting end is a port for connecting other components such as a pressure gauge 10, the corresponding connecting part 3 should be a component such as a pressure gauge 10.

[0049] The connector 3 is provided with an annular rib 301, and the locking nut 4 is provided with an internal thread that engages with the first metal thread 201. At the same time, the end of the locking nut 4 is axially limited and locked with the annular rib 301 on the side away from the metal thread sleeve 2.

[0050] It should be noted that the metal threaded sleeve 2 can be fixed to the outer periphery of the connecting end, and the first metal thread 201 can be exposed relative to the connecting end, thereby ensuring that the locking nut 4 and the first metal thread 201 are threadedly engaged; or the metal threaded sleeve 2 can be axially limited and engaged with the connecting end at least in the direction of movement facing the annular rib 301. Based on this, the metal threaded sleeve 2 can be fixedly connected to the connecting end by injection molding, such as... Figure 6 As shown, of course, the fixed connection method includes, but is not limited to, injection molding connection; the metal thread sleeve 2 can also be used as... Figure 1 The axial snap-fit ​​connection is shown.

[0051] Regardless of the connection method mentioned above, when the locking nut 4 is screwed onto the metal threaded sleeve 2, the locking nut 4 will drive the connecting piece 3 to move toward the metal threaded sleeve 2 by axially limiting and locking the annular rib 301. Under the premise that the metal threaded sleeve 2 is fixed or axially locked relative to the connecting end, the connecting piece 3 will gradually abut against the connecting end, thereby achieving a stable connection between the two.

[0052] In summary, this application provides a metal threaded sleeve 2 on the outer periphery of the connecting end of the PPR valve seat 1. The metal threaded sleeve 2 can be fixedly connected to the connecting end, for example, through injection molding, or the metal threaded sleeve 2 can be axially locked into the connecting end, thereby ensuring that the metal threaded sleeve 2 provides a stable connection support effect. An annular rib 301 is provided on the connector 3; please refer to... Figure 4The connector 3 can be an adapter for connecting to household pipes, etc. The end of the locking nut 4 is axially limited and snapped onto the side of the annular rib 301 away from the metal threaded sleeve 2. Thus, by rotating the locking nut 4, the connector 3 can be driven to move towards the connection end, thereby achieving a stable connection. This application connects the metal threaded sleeve 2 and the PPR valve seat 1 through injection molding or snap-fit, ensuring that the connection points of the valve head are all metal threads, thus being able to withstand higher connection pressures. At the same time, compared with traditional metal valve heads, the PPR valve seat 1 has a good lead-free effect, and the manufacturing process is simpler and the manufacturing cost is lower.

[0053] Please refer to Figure 2 An annular groove 102 is provided on the outer periphery of the connecting end, and a retaining ring 5 is engaged in the annular groove 102. The outer diameter of the retaining ring 5 is larger than the outer diameter of the connecting end. The metal threaded sleeve 2 is provided with an annular shoulder 202 that is axially limited and engaged with the retaining ring 5. Please refer to Figure 5 The annular shoulder 202 is located on the side of the retaining ring 5 away from the annular rib 301, so as to restrict the metal thread sleeve 2 from moving axially upward toward the annular rib 301.

[0054] Regarding the fixed connection between the metal threaded sleeve 2 and the connecting end, the metal threaded sleeve 2 is fixed relative to the connecting end in the axial, radial, and circumferential directions. When the metal threaded sleeve 2 is axially engaged with the connecting end, it is also necessary to consider limiting the metal threaded sleeve 2 in the radial and circumferential directions by the connecting end, thereby preventing instability of the metal threaded sleeve 2 during the screwing of the locking nut 4. Therefore, this application may also provide a polygonal outer wall 103 on the outer periphery of the connecting end, please refer to... Figure 3 Correspondingly, the metal threaded sleeve 2 has a polygonal inner wall 203 inside that mates with the polygonal outer wall 103. Please refer to... Figure 5 The engagement of the polygonal outer wall 103 and the polygonal inner wall 203 restricts the circumferential movement of the metal threaded sleeve 2, thereby maintaining the metal threaded sleeve 2 and the connecting end in a relatively fixed position in the circumferential direction. In the radial direction, the inner diameter of the metal threaded sleeve 2 engages with the outer diameter of the connecting end, thereby maintaining their relative fixation in the radial direction.

[0055] For connection ends through which liquid flows, such as liquid inlet ends, liquid outlet ends, and filter ends, connector 3 also includes a connector head 302 extending into the connection end. Please refer to [reference needed]. Figure 4 The connector 302 has an annular groove 303 on its outer periphery, and a sealing ring is provided in the annular groove 303. The sealing ring is sealed and abuts against the inner wall of the connector end, thereby maintaining the sealing between the connector 3 and the connector end and preventing liquid from leaking from the connection between the two.

[0056] In addition, please refer to Figure 4The outer diameter of the annular rib 301 is larger than the outer diameter of the connector 302. The sealing gasket 6 is sandwiched between the annular rib 301 and the connector end. The sealing gasket 6 is squeezed on both sides by the annular rib 301 and the connector end respectively, so as to cooperate with the sealing ring to achieve a double sealing structure at the connection, which provides the greatest safety guarantee.

[0057] When the connection end is a liquid inlet or liquid outlet port connected to the user, the connector 3 can be a PPR heat fusion joint. Household pipes can be connected by heat fusion with the PPR heat fusion joint, and disassembly and maintenance are very convenient. Furthermore, there should be at least two connection ends, corresponding to the liquid inlet and liquid outlet of the PPR valve seat 1.

[0058] This application also provides a filter, please refer to... Figure 1 The filter includes a valve head and a filter assembly 8. The valve head is the pre-filter valve head mentioned above, and the PPR valve seat 1 of the valve head is provided with a filter end that communicates with the liquid channel 101. The filter assembly 8 is located at the filter end of the PPR valve seat 1 to filter impurities in the liquid.

[0059] The above indicates that the filter assembly 8 can be connected to the valve head using a metal threaded sleeve 2 and a locking nut 4. Of course, other methods can also be used, such as connecting it to the valve head via a metal threaded insert 7. Specifically, the filter assembly 8 includes a filter bottle 801, with a metal threaded insert 7 embedded in the inner wall of the filter end. The inner wall of the metal threaded insert 7 has a second metal thread. The end of the filter bottle 801 extends into the filter end, and a third metal thread that mates with the second metal thread is provided on the outer circumference of the extended end. Thus, the filter assembly 8 is fixedly connected to the valve head through a threaded connection. Of course, other connecting parts 3 can also be connected to the valve head using the metal threaded insert 7; these will not be detailed here, but all fall within the scope of this application.

[0060] A filter element 802 is installed inside the filter bottle 801 to filter impurities in the liquid. A ball valve 804 is installed at the drain port of the filter bottle 801, and the ball valve 804 is sealed to the drain port through a sealing element 803. When filtration is required, please refer to... Figure 7 Close ball valve 804. Source water enters through the inlet pipe, flows into the inlet end of the valve head, then into the filter bottle 801, is filtered by the filter element 802, and finally exits through the outlet end of the valve head. When drainage is required, please refer to... Figure 8 Open ball valve 804, filter bottle 801 is under negative pressure, raw water enters the filter bottle 801 through the valve head to discharge mud and impurities.

[0061] Additionally, the filter includes a pressure gauge 10 mounted on the PPR valve seat 1; please refer to [reference needed]. Figure 1The pressure gauge 10 is used to monitor the fluid pressure in the liquid channel 101. The pressure gauge 10 is connected to the PPR valve seat 1 through the metal insert 9. The metal insert 9 is injection molded to the PPR valve seat 1. The metal insert 9 has metal threads, thereby realizing the threaded connection with the pressure gauge 10.

[0062] In summary, this application connects the metal threads to the PPR valve seat 1 via injection molding or snap-fit, ensuring that all connection-required parts of the valve head are made of metal. This guarantees the connection strength of the valve head, reduces process complexity and manufacturing costs, and the PPR valve seat 1 effectively isolates lead.

[0063] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0064] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A pre-filter valve head, characterized in that, include: PPR valve seat (1) includes at least one connection end; A metal thread sleeve (2) is provided on the outer periphery of the connecting end, and the outer periphery of the metal thread sleeve (2) is provided with a first metal thread (201). Connector (3), the connector (3) is provided with annular rib (301); The locking nut (4) is provided with an internal thread that mates with the first metal thread (201) thread. The end of the locking nut (4) is axially limited and engaged with the annular rib (301) on the side away from the metal thread sleeve (2). The metal threaded sleeve (2) is fixedly disposed on the outer periphery of the connecting end, or, The metal threaded sleeve (2) is axially locked and engaged with the connecting end at least in the direction of movement facing the annular rib (301).

2. The pre-filter valve head according to claim 1, characterized in that, The connecting end is provided with an annular groove (102) on its outer periphery. A retaining ring (5) is engaged in the annular groove (102). The outer diameter of the retaining ring (5) is larger than the outer diameter of the connecting end. The metal threaded sleeve (2) is provided with an annular shoulder (202) that is axially limited and engaged with the retaining ring (5). The annular shoulder (202) is located on the side of the retaining ring (5) away from the annular rib (301) to restrict the metal threaded sleeve (2) from moving axially toward the annular rib (301).

3. The pre-filter valve head according to claim 1, characterized in that, The connecting end has a polygonal outer wall (103) on its outer periphery, and the metal thread sleeve (2) has a polygonal inner wall (203) inside that cooperates with the polygonal outer wall (103) to restrict the metal thread sleeve (2) from moving relative to the connecting end in the circumferential direction.

4. The pre-filter valve head according to claim 1, characterized in that, The connector (3) includes a connector (302) extending into the connecting end. The connector (302) has an annular groove (303) on its outer periphery. A sealing ring is provided in the annular groove (303), and the sealing ring seals against the inner wall of the connecting end.

5. The pre-filter valve head according to claim 4, characterized in that, The outer diameter of the annular rib (301) is larger than the outer diameter of the connector (302). A sealing gasket (6) is sandwiched between the annular rib (301) and the connector end. The sealing gasket (6) is sleeved on the outer periphery of the connector (302).

6. The pre-filter valve head according to any one of claims 1-5, characterized in that, The connector (3) is a PPR hot melt connector, and there are two connectors, which correspond to the inlet and outlet of the PPR valve seat (1) respectively.

7. A filter, characterized in that, include: The valve head is the pre-filter valve head according to any one of claims 1-6, including a PPR valve seat (1), wherein the PPR valve seat (1) is provided with a filter end communicating with the liquid channel (101); A filter assembly (8) is located at the filter end.

8. The filter according to claim 7, characterized in that, The filter assembly (8) includes a filter bottle (801), a metal thread insert (7) is embedded in the inner wall of the filter end, the inner wall of the metal thread insert (7) is provided with a second metal thread, the end of the filter bottle (801) extends into the filter end, and a third metal thread that cooperates with the second metal thread is provided on the outer periphery of the extended end.

9. The filter according to claim 8, characterized in that, The filter bottle (801) is equipped with a filter element (802), and the drain port of the filter bottle (801) is equipped with a ball valve (804). The ball valve (804) is sealed to the drain port through a sealing element (803).

10. The filter according to claim 8, characterized in that, It also includes a pressure gauge (10) disposed on the PPR valve seat (1), the pressure gauge (10) being used to monitor the fluid pressure in the liquid channel (101), the pressure gauge (10) being connected to the PPR valve seat (1) via a metal insert (9), the metal insert (9) being injection molded to the PPR valve seat (1).

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