Pipe-in-pipe drawing mechanism and drawing faucet thereof

Abstract

The utility model provides a pipe-in-pipe drawing mechanism and a drawing faucet thereof, and relates to the technical field of faucets. Comprising a first water conveying pipeline suitable for being connected with a water inlet channel; the second water conveying pipeline is arranged on the outer side of the first water conveying pipeline in a sleeving manner and is suitable for sliding between a first position and a second position along the axis of the first water conveying pipeline; the elastic assembly is connected to the second water conveying pipeline and has elastic acting force for driving the second water conveying pipeline to move towards the first position. According to the scheme, the drawing mechanism can be optimized, the drawing function can be achieved without a heavy hammer structure, and the installation space can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of faucet structures, and in particular to a tube-in-tube pulling mechanism and a pulling faucet thereof. Background Art

[0002] Pull-out faucets can be pulled out for use, offering a wider range of uses and allowing users to clean more remote corners. However, current pull-out faucets typically use a weight (heavy hammer) installed on the pull-out tube as the driving force for returning to its original position. This inadvertently takes up more under-counter space and increases the number of installation steps required. For example, a pull-out faucet used in the kitchen is located below the countertop. Besides the sink drain pipe, there's often a small water heater, a water purifier, and even a garbage disposal. Therefore, the space under the counter for pull-out is relatively small. Therefore, installing a heavy hammer under the counter for reset results in awkward pull-out, as the movement of the heavy hammer is often blocked by the aforementioned appliances and the corresponding pipes, resulting in a poor user experience. Furthermore, the limited under-counter space increases the difficulty of installing or repairing the faucet. Utility Model Content

[0003] The utility model discloses a tube-in-tube pulling mechanism, aiming to solve the above-mentioned problems.

[0004] The utility model adopts the following scheme:

[0005] The present application provides a tube-in-tube pulling mechanism, comprising:

[0006] a first water delivery pipe, adapted to be connected to a water inlet channel;

[0007] a second water pipe, which is sleeved on the outside of the first water pipe and is suitable for sliding along the axis of the first water pipe between a first position and a second position;

[0008] An elastic component is connected to the second water pipeline and has an elastic force that drives the second water pipeline to move toward the first position; the elastic component includes an elastic member and a fixing member, wherein the fixing member is formed with a first end face with a fixed position, and the second water pipeline is formed with a second end face; the two ends of the elastic member are respectively connected to the first end face and the second end face, and the second water pipeline is suitable for moving the second end face toward or away from the first end face when moving toward the second position, thereby causing the elastic member to accumulate force to increase the elastic restoring force.

[0009] Furthermore, when the second water delivery pipe moves from the first position to the second position, the first end surface and the second end surface approach each other and compress the elastic member to increase the elastic restoring force of the elastic member.

[0010] Furthermore, the second water pipeline is suitable for passing through the fixing member, and the elastic member is sleeved on the outside of the second water pipeline.

[0011] Furthermore, it also includes a movable sealing component, which is arranged between the outer side of the first water pipeline and the inner wall of the second water pipeline to enable the first water pipeline and the second water pipeline to be movably sealed at the connection point.

[0012] Furthermore, the movable sealing assembly is arranged on the end of the second water pipeline connected to the first water pipeline, and includes a sliding seal, a retaining ring, and a retaining spring, wherein the sliding seal forms a seal between the outer wall of the first water pipeline and the inner wall of the second water pipeline, and the retaining ring is supported between the sliding seal and the retaining spring; the retaining spring is suitable for confining the retaining ring and the sliding seal within the second water pipeline.

[0013] The utility model also provides a pull-out faucet, comprising a faucet body and the tube-in-tube pull-out mechanism, wherein the tube-in-tube pull-out mechanism is arranged on the faucet body.

[0014] Furthermore, the faucet body includes a water inlet channel and a water outlet channel, the water outlet channel is connected to the first water supply pipe, and also includes a pressure limiter arranged between the water inlet channel and the water outlet channel, the pressure limiter is suitable for automatically adjusting the water flow cross-sectional area of the pressure limiter according to the medium pressure in the water inlet channel to control the size of the water flow entering the water outlet channel, thereby limiting the pressure at the rear end of the water outlet channel.

[0015] Furthermore, the faucet body includes a mounting seat, on which is formed an installation space for a pressure limiter and a water inlet and a water outlet connected to the installation space, and the water outlet area of the water outlet is smaller than the water inlet so as to form back pressure on the pressure limiter at the water outlet; the pressure limiter is arranged in the installation space, and includes an outer shell and a valve stem and a spring arranged in the outer shell; wherein, one end of the valve stem is connected to the spring, and the other end extends out of the outlet of the outer shell to form a pressure-limiting water outlet of the pressure limiter with the outlet of the outer shell, and the valve stem is suitable for moving along the axis of the outer shell, and can automatically adjust the water flow cross-section size of the pressure-limiting water outlet under the joint action of the back pressure of the water outlet and the spring.

[0016] Beneficial effects:

[0017] This solution provides a pull-out faucet solution that doesn't require a weight as a driving force. The pull-out mechanism is designed to be inside the faucet on the countertop. Because there's no weight, it doesn't take up space under the countertop, and there's no chance of other appliances or pipes obstructing the pull-out process, causing problems. Furthermore, because the pull-out mechanism is located inside the faucet on the countertop, the holes reserved for the faucet only require hot and cold water pipes, leaving more space for the module to be installed on the countertop. A pressure limiter can be provided to prevent excessive water pressure in the first water supply pipe from causing pull-out difficulties. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of a pull-out faucet according to an embodiment of the present utility model;

[0019] Figure 2 This is a schematic cross-sectional view of the pull-out faucet with a tube-in-tube pull-out mechanism in an unpulled state according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic cross-sectional view of the pull-out faucet with a tube-in-tube pull-out mechanism in a pulled-out state according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic cross-sectional view of a tube-in-tube pulling mechanism and an enlarged schematic view of a movable sealing assembly according to an embodiment of the present invention;

[0022] Figure 5 This is a structural diagram of a tube-in-tube pulling mechanism in a pulled-out state according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the exploded structure of a tube-in-tube pulling mechanism according to an embodiment of the present utility model;

[0024] Figure 7 This is a schematic cross-sectional view of a pressure limiter of a pull-out faucet in different states according to an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the exploded structure of a pressure limiter of a pull-out faucet according to an embodiment of the present utility model;

[0026] Figure 9 This is a schematic diagram of the valve stem structure of a pressure limiter of a pull-out faucet according to an embodiment of the utility model;

[0027] Icons: faucet body 1, main body 11, valve core 12, elbow 13, pull head 14, mounting seat 15, water inlet 151, water outlet 152, first water supply pipe 2, second water supply pipe 3, sliding end 31, second end face 32, sliding joint 33, elastic component 4, elastic part 41, fixing part 42, first end face 43, movable sealing component 5, sliding seal 51, first sealing plate 511, second sealing plate 512, retaining ring 52, retaining spring 53, pressure limiter 6, outer shell 61, valve stem 62, first pressure-bearing surface 621, second pressure-bearing surface 622, third pressure-bearing surface 623, spring 64, sealing ring 65, pressure-limiting water outlet 66. DETAILED DESCRIPTION

[0028] Combine Figures 1 to 9 As shown, this embodiment provides a pull-out faucet, comprising a faucet body 1 and a tube-in-tube pull-out mechanism, which is disposed on the faucet body 1. The tube-in-tube pull-out mechanism comprises: a first water pipe 2, adapted to be connected to a water inlet channel; a second water pipe 3, sleeved outside the first water pipe 2 and adapted to slide along the axis of the first water pipe 2 between a first position and a second position; and an elastic component 4, connected to the second water pipe 3 and having an elastic force for urging the second water pipe 3 toward the first position.

[0029] In this embodiment, the faucet body 1 includes a main body 11, a valve core 12, a mounting seat 15, etc. The valve core 12 is installed on the mounting seat 15, and the mounting seat 15 is formed with an installation space for the pressure limiter 6 and a water inlet 151 and a water outlet 152 connected to the installation space of the pressure limiter 6, and the water outlet 152 is connected to the first water supply pipe 2.

[0030] Combine Figures 1 to 5 As shown, in this embodiment, the first water conduit 2 is connected to the body 11 and communicates with the water outlet 152 of the mounting base 15. The first water conduit 2 can be integrally formed on the body 11 or detachably connected to the body 11. The first water conduit 2 can be a rigid, non-bendable pipe to facilitate the connection and withdrawal of the second water conduit 3. For example, the first water conduit 2 can be a metal or plastic pipe directly formed on the body 11, or inserted into the body 11 via a connector to achieve a detachable connection; including but not limited to these. In this embodiment, the first water conduit 2 and the second water conduit 3 are both disposed within the elbow 13 connected to the body 11, within the faucet.

[0031] Combine Figures 2 to 5As shown, the second water conduit 3 is a flexible tube with one end connected to a pull-out head 14 and the other end sleeved within the first water conduit 2 and adapted to slide along the axis of the first water conduit 2. The end of the second water conduit 3 sleeved within the first water conduit 2 is defined as the sliding end 31. When the pull-out head 14 is subjected to tension, the sliding end 31 of the second water conduit 3 can slide along the first water conduit 2 between a first position and a second position. The sliding end 31 is provided with an elastic component 4, which is configured to accumulate force during the movement of the second water conduit 3 from the first position to the second position, thereby increasing the elastic restoring force used to return the second water conduit 3 to the first position. The provision of this elastic component 4 allows the elastic member 41 within the elastic component 4 to compress or stretch after the second water conduit 3 is pulled and slides relative to the first water conduit 2, thereby generating an elastic restoring force suitable for pulling the second water conduit 3 back. By placing the elastic component 4 inside the faucet, the installation space required for the pull-out mechanism can be significantly reduced, making installation less complex.

[0032] Combine Figures 2 to 5As shown, in this embodiment, the elastic assembly 4 includes an elastic member 41 and a fixing member 42, wherein the elastic member 41 can be a spring. The fixing member 42 has a fixed first end surface 43, and the second water pipe 3 has a second end surface 32. The ends of the elastic member 41 are respectively connected to the first end surface 43 and the second end surface 32, and are adapted to store force to enhance the elastic restoring force when the first end surface 43 and the second end surface 32 move toward or away from each other. Here, both methods can realize that the elastic member 41 stores force when being pulled. For example, in one embodiment, the first end face 43 is close to the main body 11 and the second end face 32 is close to the pulling head 14. Then, the second water pipe 3 is pulled so that the second end face 32 is away from the first end face 43 and the elastic member 41 is stretched, so that the elastic member 41 stores force and has an elastic restoring force. In another embodiment, the second end face 32 is close to the main body 11 and the first end face 43 is close to the pulling head 14. At this time, the second water pipe 3 is pulled so that the second end face 32 is close to the first end face 43 and the elastic member 41 is compressed, so that the elastic member 41 stores force and has an elastic restoring force. Using one of the above two methods, when the second water pipe 3 moves from the first position to the second position, the first end face 43 and the second end face 32 are close to each other and compress the elastic member 41 to increase the elastic restoring force of the elastic member 41. In this embodiment, the second water pipe 3 is adapted to pass through the fixing member 42, and the elastic member 41 is sleeved on the outside of the second water pipe 3. This arrangement can make the pull-out mechanism more compact within the faucet. In a preferred embodiment, the elastic member 41 has a pre-compression or pre-tension when the second water pipe 3 is in the first position, so that the elastic member 41 exerts an initial elastic pressure or initial elastic tension on the second water pipe 3 to ensure that the second water pipe 3 is stable in the first position. It should be noted that in this embodiment, the first position can be the position of the second water pipe 3 when it is not pulled out, and the second position can be the position of the second water pipe 3 when it is pulled out to the allowable limit position.

[0033] Combine Figure 4As shown, in one embodiment, a movable sealing assembly 5 is further provided at the connection portion between the second water pipeline 3 and the first water pipeline 2. The movable sealing assembly 5 is arranged between the outer side of the first water pipeline 2 and the inner wall of the second water pipeline 3, so that the first water pipeline 2 and the second water pipeline 3 are movably sealed at the connection. Specifically, the movable sealing assembly 5 is arranged on the end of the second water pipeline 3 connected to the first water pipeline 2, and includes a sliding seal 51, a retaining ring 52, and a retaining spring 53, wherein the sliding seal 51 forms a seal between the outer wall of the first water pipeline 2 and the inner wall of the second water pipeline 3, and the retaining ring 52 is supported between the sliding seal 51 and the retaining spring 53; the retaining spring 53 is suitable for restricting the retaining ring 52 and the sliding seal 51 within the second water pipeline 3. Here, the sliding end 31 of the second water supply pipe 3 is provided with a sliding joint 33, and the sliding joint 33 is provided with an installation groove for installing the movable sealing assembly 5. The sliding seal 51 is arranged at the bottom of the installation groove, and the retaining ring 52 is arranged between the sliding seal 51 and the anti-retraction spring 53. The anti-retraction spring 53 is arranged in the installation groove to fix the retaining ring 52 and the sliding seal 51 in the installation groove. A V-shaped groove is provided on the side of the sliding seal 51 away from the opening of the installation groove so that the sliding seal 51 has a V-shaped opening in the pulling direction, and the sliding seal 51 forms a first sealing sheet 511 and a second sealing sheet 512 through the V-shaped opening. The second sealing sheet 512 is close to the inner wall of the second water pipe 3 and is in tight contact with the inner wall of the second water pipe 3, and the first sealing sheet 511 is in tight contact with the outer wall of the first water pipe 2. Therefore, through the action of the first sealing sheet 511 and the second sealing sheet 512, the sealing effect of the first water pipe 2 and the second water pipe 3 can be improved, and during the pulling activity, the sliding seal 51 is kept tight against the outer wall of the first water pipe 2 and the inner wall of the second water pipe 3 to ensure the sealing effect.

[0034] Combine Figures 2 to 3 As shown, the faucet body 1 includes an inlet channel and an outlet channel. The outlet channel communicates with the first water supply pipe 2. The valve core 12 is used to control the opening and closing of the inlet and outlet channels. A pressure limiter 6 is provided between the inlet and outlet channels. The pressure limiter 6 is adapted to control the water pressure in the outlet channel to prevent the water pressure in the first water supply pipe 2 from exceeding a preset value. In other words, the pressure limiter 6 prevents excessive water pressure in the first water supply pipe 2 from causing difficulty in drawing or pulling.

[0035] Combine Figures 7 to 9As shown, specifically, the pressure limiter 6 is disposed within the mounting base 15, which defines a mounting space for the pressure limiter 6. The water outlet 152 and the water inlet 151 of the mounting base 15 are in communication with the mounting space, and the water inlet 151 is in communication with the water outlet 152 of the valve core 12. From the perspective of the entire faucet assembly, the water outlet area of the pull-out head 14 is the smallest, so back pressure is generated on the pressure limiter 6 at the water outlet 152. Of course, in other embodiments, the water outlet area of the water outlet 152 may be smaller than that of the water inlet 151 to generate back pressure on the pressure limiter 6 at the water outlet 152. The pressure limiter 6 is arranged in the installation space and includes a housing 61, a valve stem 62, a spring 64, and a sealing ring 65. The valve stem 62 is arranged in the housing 61 and is suitable for sliding in the housing 61. The valve stem 62 is provided with a sealing ring 65. The spring 64 connects the valve stem 62 so that the valve stem 62 has a force to move toward the water outlet 152. A pressure-limiting outlet 66 is formed between the housing 61 and the valve stem 62. The valve stem 62 is suitable for moving up and down in the housing 61 under the joint control of the back pressure at the water outlet 152 and the force of the spring 64 to automatically adjust the size of the pressure-limiting outlet 66, thereby controlling the size of the water flow from the pressure-limiting outlet 66 to the water outlet 152 to limit the water pressure at the rear end of the water outlet 152. In this embodiment, the valve stem 62 can move up and down along the axis of the housing 61, and the movement of the valve stem 62 along the axis of the housing 61 controls the cross-section of the pressure-limiting outlet 66 to increase or decrease. The valve stem 62 has a first pressure-bearing surface 621, a second pressure-bearing surface 622 and a third pressure-bearing surface 623, wherein the third pressure-bearing surface 623 is located below the water inlet 151, and the second pressure-bearing surface 622 is located above the water inlet 151 and opposite to the third pressure-bearing surface 623; the first pressure-bearing surface 621 is arranged at the top of the valve stem 62 and opposite to the water outlet 152, and the second pressure-bearing surface 622 and the first pressure-bearing surface 621 are arranged on two opposite sides of the top of the valve stem 62; the effective pressure-bearing projection surface of the second pressure-bearing surface 622 and the third pressure-bearing surface 623 are the same, so that the force generated by the water pressure applied on the projection surface is the same and in opposite directions, thereby offsetting the force of the water pressure at the water inlet on the second pressure-bearing surface 622 and the third pressure-bearing surface 623; the force generated by the back pressure P applied to the effective projection surface of the first pressure-bearing surface 621 is opposite to the direction of the force of the spring 64 to control the movement of the valve stem 62.

[0036] Combine Figure 7As shown, during operation, water flows in through the water inlet 151 of the mounting seat 15 and flows out from the water outlet 152 of the mounting seat 15. The cross-sectional size of the pressure-limiting water outlet 66 is controlled by the valve stem 62. Because the water outlet 152 of the mounting seat 15 is smaller than the water inlet 151, there will be a back pressure P in the water channel at the rear end of the valve stem 62. This pressure changes with the cross-sectional area of the pressure-limiting water outlet 66 controlled by the valve stem 62; in the initial state, when the water inlet 151 is not flowing, the valve stem 62 moves upward under the action of the spring 64, so that the pressure-limiting water outlet 66 is at a larger opening, and the cross-sectional area of the pressure-limiting water outlet 66 is relatively large. After water is flowing, a back pressure P is generated at the rear end of the valve stem 62, and the force generated by the back pressure acting on the first pressure-bearing surface 621 causes the valve stem 62 to move downward, and the spring 64 is compressed; as the pressure at the water inlet 151 increases, the back pressure P at the rear end of the valve stem 62 As the pressure increases, the force applied to the first pressure-bearing surface 621 also increases, causing the valve stem 62 to continue to move downward and compress the spring 64, resulting in a decrease in the cross-sectional area of the pressure-limiting outlet 66 to limit the increase in pressure at the rear end of the valve stem 62, until the force applied by the back pressure P on the first pressure-bearing surface 621 is close to the elastic force value of the spring 64 (this process ignores the influence of the friction force brought by the sealing ring 65), then the position of the valve stem 62 remains relatively stable and is in a relatively balanced state; at this time, if the source pressure continues to rise, the back pressure P at the rear end of the valve stem 62 does not increase; if the source water pressure of the inflow decreases, the back pressure P at the rear end of the valve stem 62 decreases accordingly, and the elastic force of the spring 64 is greater than the back pressure and the force of the water inlet 151 on the valve stem 62, causing the valve stem 62 to move upward under the action of the spring 64, and the cross-sectional area of the pressure-limiting outlet 66 increases until a new balance is maintained.

[0037] In this embodiment, the pulling head 14 is an existing technical product, which is connected to the second water pipeline 3 and can be connected to the elbow 13 when the second water pipeline 3 is in the first position.

[0038] Through this embodiment, the pull-out faucet without a heavy hammer not only brings worry-free pulling and smoothing, but also makes the under-counter space more concise and convenient for the installation of other appliances. By setting the pressure limiter 6, it can also prevent the water pressure from being too high to affect the normal use of the pull-out.

[0039] It should be understood that the above are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention fall within the protection scope of the present invention.

[0040] The above description of the drawings used in the implementation manner only shows certain embodiments of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

Claims

1. A tube-in-tube pulling mechanism, characterized in that: include: a first water delivery pipe, adapted to be connected to a water inlet channel; a second water pipe, which is sleeved on the outside of the first water pipe and is suitable for sliding along the axis of the first water pipe between a first position and a second position; an elastic component connected to the second water pipe and having an elastic force for driving the second water pipe to move toward the first position; The elastic component includes an elastic member and a fixing member, wherein the fixing member is formed with a first end face having a fixed position, and the second water supply pipe is formed with a second end face; the two ends of the elastic member are respectively connected to the first end face and the second end face, and the second water supply pipe is suitable for moving toward the second position so that the second end face approaches or moves away from the first end face, thereby allowing the elastic member to store force to increase the elastic restoring force.

2. The tube-in-tube pulling mechanism according to claim 1, characterized in that: When the second water delivery pipe moves from the first position to the second position, the first end surface and the second end surface approach each other and compress the elastic member to increase the elastic restoring force of the elastic member.

3. The tube-in-tube pulling mechanism according to claim 1, characterized in that: The second water pipeline is suitable for passing through the fixing member, and the elastic member is sleeved on the outside of the second water pipeline.

4. The tube-in-tube pulling mechanism according to claim 1, characterized in that: It also includes a movable sealing component, which is arranged between the outer side of the first water pipeline and the inner wall of the second water pipeline to ensure that the first water pipeline and the second water pipeline are movably sealed at the connection point.

5. The tube-in-tube pulling mechanism according to claim 4, characterized in that: The movable sealing assembly is arranged on the end of the second water pipeline connected to the first water pipeline, and includes a sliding seal, a retaining ring, and a retaining spring, wherein the sliding seal forms a seal between the outer wall of the first water pipeline and the inner wall of the second water pipeline, and the retaining ring is supported between the sliding seal and the retaining spring; the retaining spring is suitable for confining the retaining ring and the sliding seal within the second water pipeline.

6. A pull-out faucet, comprising a faucet body, characterized in that: It also includes the tube-in-tube pulling mechanism according to any one of claims 1 to 5, and the tube-in-tube pulling mechanism is arranged on the faucet body.

7. The pull-out faucet according to claim 6, wherein the faucet body comprises a water inlet channel and a water outlet channel, the water outlet channel is connected to the first water supply pipeline, and is characterized in that: It also includes a pressure limiter arranged between the water inlet channel and the water outlet channel, and the pressure limiter is suitable for automatically adjusting the water flow cross-sectional area of the pressure limiter according to the medium pressure in the water inlet channel to control the size of the water flow entering the water outlet channel, thereby limiting the pressure at the rear end of the water outlet channel.

8. The pull-out faucet according to claim 7, characterized in that: The faucet body includes a mounting seat, The mounting seat is provided with a mounting space for the pressure limiter and a water inlet and a water outlet communicating with the mounting space, and a back pressure is formed on the pressure limiter at the water outlet; The pressure limiter is arranged in the installation space, and includes a shell and a valve stem and a spring arranged in the shell; wherein, one end of the valve stem is connected to the spring, and the other end extends out of the outlet of the shell to form a pressure-limiting water outlet of the pressure limiter with the outlet of the shell, and the valve stem is suitable for moving along the axis of the shell, and can automatically adjust the water flow cross-section size of the pressure-limiting water outlet under the joint action of the back pressure of the water outlet and the spring.

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