Fabricated water separation valve head and pre-filter

Abstract

The utility model provides an assembly type waterproof valve head and a pre-filter. The assembly type waterproof valve head comprises a valve body and a waterproof elbow. The valve body comprises a main pipe body and a connector part, a water inlet end and a water outlet end are formed at the two axial ends of the main pipe body respectively, the connector part extends from the side wall of the main pipe body in the radial direction to be connected with a filter bottle of the pre-filter, and the inner diameter of the connector part is larger than that of the main pipe body. Two assembling steps located on the two radial sides of the main pipe body are formed at the joint of the connector part and the main pipe body, and a valve body assembling part is formed on each assembling step. The waterproof elbow is embedded into the valve body in a split mode and comprises a connecting straight section embedded into the main pipe body and connected with the water outlet end and a bent section extending towards the side where the valve body connector part is located, the tail end of the bent section extends out of the assembling step, and an elbow assembling part clamped with the valve body assembling part is formed on the peripheral wall of the bent section. The peripheral wall, facing the water inlet end side, of the bent section forms an isolation part for isolating the water inlet end and the water outlet end.

Description

Technical Field

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

[0002] With the continuous improvement of living standards, people have also put forward stricter hygiene requirements for drinking water. Modern household water is installed with a pre-filter to prevent secondary water contamination. The pre-filter is the first coarse filtration device for the water used in the whole house, which can remove large particles such as mud, sand, and rust from the tap water. The existing pre-filter mainly consists of a valve head and a filter bottle connected to the valve head at the upper end, which is equipped with a filter element. During use, raw water flows from the water inlet end of the valve head into the gap between the filter bottle and the filter element. After being filtered by the filter element, it becomes clean water and flows out from the water outlet end of the valve head.

[0003] To prevent raw water from flowing directly from the inlet to the outlet of the valve body, a water barrier is required within the valve body. Existing prefilter valve heads are mostly one-piece copper structures. The presence of a water barrier within the valve body results in numerous machining steps, increased processing complexity, and difficulty controlling machining precision. To address this issue, some have proposed a split-type water barrier structure and using a water distributor to confine the water barrier within the valve head cavity. While a split-type structure simplifies valve head machining, the water barrier's fixed structure using a water distributor is not only complex but also limits the water distributor's installation location (typically, it is installed within the filter bottle), impacting water distribution performance. Furthermore, in this structure, the water distributor merely confines the water barrier within the valve head cavity; there's no fixed connection between the water barrier and the valve head, meaning the water barrier remains movable within the valve head. If the water barrier moves or rotates under the influence of water flow, it can easily block the pressure gauge inlet, causing the pressure gauge to fail. It can also create a gap between the inlet and outlet, impacting filter performance and other potential problems. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an assembled water-isolating valve head and a pre-filter with simple processing technology and high assembly stability.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an assembled water-isolating valve head, which includes a valve body and a water-isolating elbow. The valve body includes a main body and an interface portion, the axial ends of the main body respectively form a water inlet end and a water outlet end, the interface portion extends from the side wall of the main body in a radial direction to connect to the filter bottle of the pre-filter, the inner diameter of the interface portion is larger than the inner diameter of the main body, and the connection between the interface portion and the main body forms two assembly steps located on both sides of the radial direction of the main body, and a valve body assembly portion is formed on each assembly step. The water-isolating elbow is embedded in the valve body in a split manner, and the water-isolating elbow includes a connecting straight section embedded in the main body and connected to the water outlet end, and a curved section extending to the side where the valve body interface portion is located. The end of the curved section extends over the assembly step, and an elbow assembly portion engaged with the valve body assembly portion is formed on the outer peripheral wall of the curved section, and the peripheral wall of the curved section facing the water inlet end forms an isolation portion that isolates the water inlet end and the water outlet end.

[0006] According to one embodiment of the present invention, the valve body assembly portion is a slot formed on the inner side of the assembly step and opening toward the inner cavity of the main body, a plastic blocking portion is formed at one end of the slot close to the interface portion, and the elbow assembly portion on the water-blocking elbow is a snap-fit ​​protrusion embedded in the slot and the snap-fit ​​protrusion is limited in the slot by the plastic blocking portion.

[0007] According to one embodiment of the present invention, the inner surface of the plastic barrier portion is a plane, and its outer surface is a guide surface that gradually extends from the step surface of the assembly step toward the side where the card slot is located; the inner surface of the plastic barrier portion refers to the surface of the plastic barrier portion facing the card slot, and its outer surface is the surface facing away from the card slot.

[0008] According to one embodiment of the present invention, the elbow assembly portion has a first surface facing the free end of the bending section and the first surface is a plane to engage with the inner surface of the plastic barrier portion; the second surface on the locking protrusion opposite to the first surface is an inclined surface and the slope of the inclined surface matches the slope of the outer surface of the plastic barrier portion.

[0009] According to one embodiment of the present invention, a pressure gauge connection portion is formed on the peripheral wall of the main body opposite to the interface portion, and a flow gap is formed between the outer peripheral wall of the curved section of the water-blocking elbow and the inner wall of the main body, and the flow gap connects the water inlet end of the main body and the pressure gauge connection portion.

[0010] According to one embodiment of the present invention, the pressure gauge connection portion includes an inlet section close to the inner cavity of the main body and connected to the flow gap, a throat located downstream of the inlet section, and a connection hole section extending out of the peripheral wall of the main body and used to connect the pressure gauge.

[0011] According to an embodiment of the present invention, the outer peripheral wall of the curved section of the water-blocking elbow is an arc-shaped curved peripheral wall, and a flow gap is formed between the outer peripheral wall of the curved section and the inner wall of the main pipe where the inlet section is located.

[0012] According to an embodiment of the present invention, a first sealing groove opening toward the axial direction of the main body is formed on the water inlet end surface of the main body, and a second sealing groove opening toward the inner cavity of the main body is formed on the inner peripheral wall of the water inlet end of the main body.

[0013] According to one embodiment of the present invention, the assembled water-blocking elbow also includes a joint assembly that is detachably connected to the water inlet end of the main pipe body. The joint assembly includes a hot melt joint, a flexible nut, a first sealing ring and a second sealing ring. The first sealing ring and the second sealing ring are respectively embedded in the first sealing groove and the second sealing groove on the main pipe body. The end of the hot melt joint is sleeved on the water inlet end of the main pipe body and radially sealed by the second sealing ring. The flexible nut is respectively sleeved on the hot melt joint and the water inlet end of the main pipe body and axially sealed by the first sealing ring.

[0014] On the other hand, the present invention also provides a pre-filter, which includes the above-mentioned assembled water-isolating valve head.

[0015] In summary, in the assembled water-blocking valve head provided by the present invention, the water-blocking elbow is embedded in the valve body in a split type. The split structure allows the water-blocking elbow and the valve body to be processed separately, which greatly simplifies the processing technology and effectively reduces the processing difficulty. The valve body includes a main body and an interface portion with different inner diameters. The connection between the two forms an assembly step and a valve body assembly portion is formed on each assembly step; correspondingly, an elbow assembly portion that cooperates with the valve body assembly portion is formed on the outer peripheral wall of the curved section of the water-blocking elbow. When the water-blocking elbow is embedded in the valve body, the elbow assembly portion will be engaged with the valve head assembly portion to realize a direct connection between the water-blocking elbow and the valve body. This method is not only reliable in connection but also does not require the assistance of other parts.

[0016] Furthermore, by setting the valve body assembly part as a slot and forming a plastic barrier part on the side of the slot close to the interface part, the elbow assembly part on the water-blocking elbow can slide into the slot along the guide surface on the plastic barrier part, and the inner surface of the plastic barrier part forms a hook to limit the elbow assembly part. At the same time, the side walls at both ends of the slot also limit the elbow assembly part in the axial direction to achieve a stable connection of the water-blocking elbow. In the assembled water-blocking valve head provided in this embodiment, the length of the curved section on the water-blocking elbow is not limited, so it is set to be longer to extend over the assembly step in the valve body, thereby achieving effective isolation between the water inlet and the water outlet.

[0017] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a structural schematic diagram of the assembled water-isolating valve head provided in Example 1 of the present utility model.

[0019] Figure 2 Shown Figure 1 Schematic diagram of the structure with the middle water-isolating elbow and valve body separated.

[0020] Figure 3 Shown Figure 1 Schematic cross-section along line FF.

[0021] Figure 4 Shown Figure 3 Enlarged schematic diagram of point A in the middle.

[0022] Figure 5 Shown Figure 1 Schematic diagram of the structure after the middle valve body is partially cut away.

[0023] Figure 6 Shown Figure 5 Enlarged schematic diagram of point B in the middle.

[0024] Figure 7 The figure shows the structure of the valve body after it is partially cut away from another perspective.

[0025] Figure 8 Shown Figure 7 Enlarged schematic diagram of point C in the middle.

[0026] Figure 9 Shown is a schematic structural diagram of the water-isolating elbow in 1.

[0027] Figure 10 Shown Figure 9 Schematic diagram of the structure after the middle water-isolating elbow is partially cut away.

[0028] Figure 11 Shown Figure 10 Enlarged schematic diagram of point D in the middle.

[0029] Figure 12 Shown Figure 1 Schematic diagram of the structure of the middle joint assembly in the separated state. DETAILED DESCRIPTION

[0030] like Figures 1 to 12As shown, the assembled water-blocking valve head provided in this embodiment includes a valve body 1 and a water-blocking elbow 2. The valve body 1 includes a main body 11 and an interface portion 12. The axial ends of the main body 11 respectively form a water inlet end 111 and a water outlet end 112. The interface portion 12 extends radially from the side wall of the main body 11 to connect to the filter bottle of the pre-filter. The inner diameter of the interface portion 12 is larger than the inner diameter of the main body 11. The connection between the interface portion 12 and the main body 11 forms two assembly steps 13 located on both sides of the main body 11 in the radial direction, and each assembly step 13 is formed with a valve body assembly portion 131. The water-blocking elbow 2 is embedded in the valve body 1 in a split manner. The water-blocking elbow 2 includes a connecting straight section 21 embedded in the main pipe 11 and connected to the water outlet end 112, and a curved section 22 extending to the side where the valve body interface part 12 is located. The end of the curved section 22 extends over the assembly step 13 and an elbow assembly part 221 that engages with the valve body assembly part 131 is formed on the outer peripheral wall of the curved section 22. The peripheral wall of the curved section 22 facing the water inlet end forms an isolation part 222 that isolates the water inlet end 111 and the water outlet end 112.

[0031] In the assembled water-blocking valve head provided in this embodiment, the split assembly structure allows the valve body 1 and water-blocking elbow 2 to be independently machined and then assembled, significantly reducing the difficulty of manufacturing the valve head. The difference in diameter between the main pipe 11 and the interface portion 12 within the valve body 1 creates an assembly step 13 between them. By providing a valve body assembly portion 131 on the assembly step 13 that mates with the elbow assembly portion 221, a direct connection between the water-blocking elbow 2 and the valve body 1 is achieved. This connection method is not only stable and simple, but also requires no additional components, significantly reducing the complexity of the assembled water-blocking valve head structure and its manufacturing process.

[0032] In this embodiment, if Figures 5 to 8 As shown, the valve body assembly portion 131 is a slot formed on the inner side of the assembly step 13 and opening toward the inner cavity of the main body 11, and a plastic blocking portion 132 is formed at one end of the slot near the interface portion 12. Figures 9 to 11 As shown, the elbow assembly portion 221 on the watertight elbow 2 is a snap-fitting protrusion embedded in the slot, and the snap-fitting protrusion is confined in the slot by the plastic barrier portion 132. Specifically, the inner surface 1321 of the plastic barrier portion 132 is a plane, and its outer surface 1322 is a guide surface that gradually extends from the step surface of the assembly step 131 toward the side where the slot is located. The inner surface 1321 of the plastic barrier portion refers to the surface of the plastic barrier portion 132 facing the slot, and the outer surface 1322 is the surface facing away from the slot. Correspondingly, the elbow assembly portion 221 has a first surface 2211 facing the free end of the curved section 22, and the first surface 2211 is a plane that snaps onto the inner surface 1321 of the plastic barrier portion. The second surface 2212 on the snap-fitting protrusion, opposite to the first surface 2211, is an inclined surface, and the slope of the inclined surface matches the slope of the outer surface 1322 of the plastic barrier portion.

[0033] During assembly, the water-blocking elbow 2 is placed into the main body 11 from the valve body interface portion 12, with the connecting straight section 21 on the water-blocking elbow 2 facing the water outlet end 112, and the wall of the curved section 22 facing the water inlet end 111 of the main body. Press the water-blocking elbow 2 to gradually move it toward the inner cavity of the main body 11. At this time, the inclined second surface 2212 on the elbow assembly portion 221 will slide relative to the inclined outer surface 1322 on the plastic barrier portion 132. During the sliding and extruding process, the plastic barrier portion 132 bends and deforms toward the side where the slot (i.e., the valve body assembly portion 131) is located, so that the elbow assembly portion 221 is embedded in the slot. After embedding, the inner surface 1321 of the plastic barrier portion will abut the first surface 2211 of the elbow assembly portion to limit the elbow assembly portion 221 and prevent the water-blocking elbow 2 from detaching from the valve body 1. At the same time, the two axial end walls of the slot (i.e., the valve body assembly portion 131) also block the two ends of the elbow assembly portion 221, thereby achieving axial limitation of the water-isolating elbow 2 in the valve body 1. Figure 4 shown.

[0034] In this embodiment, the valve body 1 and the water-isolating elbow 2 are both made of metal, such as copper or stainless steel. The inclined inner surface 1321 of the plastic barrier portion also reduces the thickness of the end of the plastic barrier portion 132, thereby enabling better plastic deformation during assembly. However, the present invention is not limited to this. In other embodiments, the valve body and the water-isolating elbow may also be made of other materials with plastic deformation properties, such as plastic.

[0035] After the water-isolating elbow 2 is assembled with the valve body 1, the end of the straight connecting section 21 of the water-isolating elbow is sealed to the outlet end 112 of the main body via a sealing ring 4. The peripheral wall of the curved section 22 facing the water inlet end 111 forms a partition 222 that separates the water inlet and outlet ends. Raw water flowing into the water inlet end 111 is blocked by the partition 222 and then enters the filter bottle through the interface 12 for filtration. The filtered water then flows from the filter bottle to the water outlet.

[0036] In order to detect the pressure at the water inlet, the pre-filter usually installs a pressure gauge on the valve head. Figure 1As shown, in the assembled water-blocking valve head provided in this embodiment, a pressure gauge connection portion 3 is formed on the peripheral wall of the main body 11 at a position opposite to the interface portion 12, and a flow gap 10 is formed between the outer peripheral wall of the curved section 22 of the water-blocking elbow and the inner wall of the main body 11. The flow gap 10 connects the water inlet end 111 of the main body and the pressure gauge connection portion 3. Specifically, the pressure gauge connection portion 3 includes an inlet section 31 close to the inner cavity of the main body 11 and connected to the flow gap 10, a throat 32 located downstream of the inlet section 31, and a connecting hole section 33 extending from the outer peripheral wall of the main body 11 and used to connect the pressure gauge. The inlet section 31 with a larger aperture provides more space for the arrangement of the flow gap 10, thereby preventing the outer peripheral wall of the water-blocking elbow 2 from blocking the throat 32 of the pressure gauge connection portion 3 and causing the pressure gauge to fail. Preferably, the outer peripheral wall of the curved section 22 of the water-blocking elbow is an arc-shaped curved peripheral wall, and a flow gap 10 is formed between the outer peripheral wall of the curved section 22 and the inner wall of the main body 11 where the inlet section 31 is located. However, the present invention does not impose any limitation on this. In other embodiments, the outer peripheral wall of the curved section may be in the shape of a truncated cone, and a flow gap may be formed between the inclined outer wall of the truncated cone and the inner wall of the main tube where the inlet section is located.

[0037] like Figure 1 、 Figure 5 as well as Figure 12 As shown, the assembled water-blocking valve head provided in this embodiment also includes a joint assembly 5. Specifically, the joint assembly 5 includes a hot melt joint 51, a flexible nut 52, a first sealing ring 53 and a second sealing ring 54. A first sealing groove 114 with an opening facing the axial direction of the main body 11 is formed on the end surface of the water inlet end 111 of the main body, and a second sealing groove 114 with an opening facing the inner cavity of the main body 11 is formed on the inner peripheral wall of the water inlet end 111 of the main body. The first sealing ring 53 and the second sealing ring 54 are respectively embedded in the first sealing groove 113 and the second sealing groove 114. The end of the hot melt joint 51 is sleeved on the water inlet end 111 of the main body and radially sealed by the second sealing ring 54. The flexible nut 52 is respectively sleeved and connected to the hot melt joint 51 and the water inlet end 111 of the main body and axially sealed by the first sealing ring 114. The axial sealing of the first sealing ring 53 and the radial sealing of the second sealing ring 54 provide double sealing for the connection of the hot melt joint 51, greatly improving the sealing performance of the joint assembly 5. When the union nut 52 becomes loose due to external influences, the axial seal provided by the first sealing ring 53 becomes invalid; at this time, the radial seal provided by the second sealing ring 54 can still perform the sealing function without water leakage.

[0038] Correspondingly, this embodiment also provides a pre-filter including the above-mentioned assembled water-blocking valve head, and the filter bottle in the pre-filter is threadedly connected to the interface portion 12 on the valve body 1.

[0039] In summary, in the assembled water-blocking valve head provided by the present invention, the water-blocking elbow is embedded in the valve body in a split type. The split structure allows the water-blocking elbow and the valve body to be processed separately, which greatly simplifies the processing technology and effectively reduces the processing difficulty. The valve body includes a main body and an interface part with different inner diameters. The connection between the two forms an assembly step and a valve body assembly part is formed on each assembly step; correspondingly, an elbow assembly part that cooperates with the valve body assembly part is formed on the outer peripheral wall of the curved section of the water-blocking elbow. When the water-blocking elbow is embedded in the valve body, the elbow assembly part will be engaged with the valve head assembly part to realize the direct connection between the water-blocking elbow and the valve body. This method is not only reliable in connection but also does not require the assistance of other parts.

[0040] Furthermore, by setting the valve body assembly portion as a slot and forming a plastic barrier portion on one side of the slot close to the interface portion, the elbow assembly portion on the water-blocking elbow can slide into the slot along the guide surface on the plastic barrier portion, and the inner surface of the plastic barrier portion forms a hook to limit the elbow assembly portion. At the same time, the side walls at both ends of the slot also limit the water-blocking elbow in the axial direction to achieve a stable connection of the water-blocking elbow. In the assembled water-blocking valve head provided in this embodiment, the length of the curved section on the water-blocking elbow is not limited, so it is set to be longer to extend over the assembly step in the valve body, thereby achieving effective isolation between the water inlet and the water outlet.

[0041] Although the present invention has been disclosed above by means of preferred embodiments, this is not intended to limit the present invention. Anyone skilled in the art may make slight changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of protection required by the claims.

Claims

1. An assembled water-blocking valve head, characterized in that: include: The valve body comprises a main body and an interface portion, wherein the axial ends of the main body respectively form a water inlet end and a water outlet end, the interface portion extends radially from the side wall of the main body to connect to the filter bottle of the pre-filter, the inner diameter of the interface portion is larger than the inner diameter of the main body, and the connection between the interface portion and the main body forms two assembly steps located on both radial sides of the main body, and each assembly step is formed with a valve body assembly portion; The water-isolating elbow is embedded in the valve body in a split type. The water-isolating elbow includes a connecting straight section embedded in the main pipe and connected to the water outlet end, and a curved section extending toward the side where the valve body interface portion is located. The end of the curved section extends over the assembly step and an elbow assembly portion that engages with the valve body assembly portion is formed on the outer peripheral wall of the curved section. The peripheral wall of the curved section facing the water inlet end forms an isolation portion that isolates the water inlet end and the water outlet end.

2. The assembled water-isolating valve head according to claim 1, wherein: The valve body assembly part is a slot formed on the inner side of the assembly step and opening toward the inner cavity of the main body. A plastic blocking part is formed at one end of the slot close to the interface part. The elbow assembly part on the water-blocking elbow is a snap-fit ​​protrusion embedded in the slot and the snap-fit ​​protrusion is confined in the slot by the plastic blocking part.

3. The assembled water-isolating valve head according to claim 2, wherein: The inner surface of the plastic barrier portion is a plane, and its outer surface is a guide surface that gradually extends from the step surface of the assembly step toward the side where the card slot is located; the inner surface of the plastic barrier portion refers to the surface of the plastic barrier portion facing the card slot, and its outer surface is the surface facing away from the card slot.

4. The assembled water-isolating valve head according to claim 3 is characterized in that: The elbow assembly portion has a first surface facing the free end of the bending section, and the first surface is a plane to engage with the inner surface of the plastic barrier portion; the second surface on the locking protrusion opposite to the first surface is an inclined surface, and the slope of the inclined surface matches the slope of the outer surface of the plastic barrier portion.

5. The assembled water-isolating valve head according to claim 1, wherein: A pressure gauge connection portion is formed on the peripheral wall of the main body opposite to the interface portion, and a flow gap is formed between the outer peripheral wall of the curved section of the water-blocking elbow and the inner wall of the main body, and the flow gap connects the water inlet end of the main body and the pressure gauge connection portion.

6. The assembled water-isolating valve head according to claim 5, wherein: The pressure gauge connection portion includes an inlet section close to the inner cavity of the main body and connected to the flow gap, a throat section located downstream of the inlet section, and a connection hole section extending out of the peripheral wall of the main body and used for connecting the pressure gauge.

7. The assembled water-isolating valve head according to claim 6, wherein: The outer peripheral wall of the curved section of the water-blocking elbow is an arc-shaped curved peripheral wall, and a flow gap is formed between the outer peripheral wall of the curved section and the inner wall of the main body where the inlet section is located.

8. The assembled water-isolating valve head according to claim 1, wherein: A first sealing groove with an opening facing the axial direction of the main body is formed on the water inlet end surface of the main body, and a second sealing groove with an opening facing the inner cavity of the main body is formed on the inner peripheral wall of the water inlet end of the main body.

9. The assembled water-isolating valve head according to claim 1, wherein: The assembled water-blocking elbow also includes a joint assembly that is detachably connected to the water inlet end of the main body. The joint assembly includes a hot melt joint, a flexible nut, a first sealing ring and a second sealing ring. The first sealing ring and the second sealing ring are respectively embedded in the first sealing groove and the second sealing groove on the main body. The end of the hot melt joint is sleeved on the water inlet end of the main body and radially sealed by the second sealing ring. The flexible nut is respectively sleeved on the hot melt joint and the water inlet end of the main body and axially sealed by the first sealing ring.

10. A pre-filter, characterized in that: It comprises the assembled water-isolating valve head according to any one of claims 1 to 9.

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