Pressure limiting mechanism and faucet thereof

Abstract

The utility model provides a pressure limiting mechanism and a faucet thereof, and relates to the technical field of pressure limiting structures. Comprising a water inlet channel and a water outlet channel, a pressure limiter is arranged between the water inlet channel and the water outlet channel and is suitable for automatically adjusting the water passing sectional area of the pressure limiter according to the medium pressure in the water inlet channel so as to control the water flow entering the water outlet channel, and then the pressure of the rear end of the water outlet channel is limited. According to the scheme, the pressure limiting mechanism capable of automatically adjusting the pressure is provided, and control over the pressure of the water outlet channel is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure limiting structures, and more specifically, to a pressure limiting mechanism and a faucet thereof. Background Art

[0002] In some countries and regions with relatively high water supply pressure, high water pressure brings abundant water volume to provide a high-quality water use experience such as showering. However, apart from this advantage of water use experience, high water pressure also brings some drawbacks. For example: 1. The pipeline bears high pressure for a long time, and the risk of leakage increases accordingly; 2. High water pressure also requires a greater force value for some switching mechanisms during switching; 3. The higher the water pressure, the faster the water flow, resulting in waste of water resources. Therefore, in shower products and kitchen faucets, it is often necessary to add some components to reduce the flow rate to solve some of the drawbacks brought by high water pressure. Generally, this technology uses a water-saving piece as a solution. However, using a water-saving piece cannot well control the reduction of water pressure, and it will also block the flow in a low-pressure environment. The flow rates of the same product with and without a water-saving piece are different at low pressure, and the flow rate with a water-saving piece is smaller. Therefore, it is necessary to solve the problem that the addition of components to the original product does not affect the original flow rate in a low-pressure environment, and can reduce the flow channel pressure to maintain a relatively stable numerical range at high pressure. Summary of the Utility Model

[0003] The utility model discloses a pressure limiting mechanism, aiming to solve the problems mentioned above.

[0004] The utility model adopts the following solutions:

[0005] A pressure limiting mechanism includes an inlet channel and an outlet channel adapted to communicate with each other; a pressure limiter is provided between the inlet channel and the outlet channel. The pressure limiting mechanism includes a mounting seat adapted to mount the pressure limiter. The mounting seat is provided with the inlet channel and the outlet channel, and the cross-sectional area of the water passage at the rear end of the outlet channel is smaller than that of the inlet channel, so that the outlet channel can exert a back pressure on the pressure limiter when water is flowing through. The pressure limiter is adapted to automatically adjust the cross-sectional area of the water passage of the pressure limiter according to the medium pressure in the inlet channel to control the water flow rate entering the outlet channel, thereby limiting the pressure at the rear end of the outlet channel.

[0006] Furthermore, the pressure limiter includes a housing and a valve stem and a spring arranged in the housing; one end of the valve stem is connected to the spring, and the other end extends out of the water outlet of the housing to form the water passage of the pressure limiter with the water outlet of the housing. The valve stem is adapted to move along the axis of the housing, and can automatically adjust the cross-sectional area of the water passage under the combined action of the back pressure of the outlet channel and the elastic force of the spring.

[0007] Further, the valve stem includes a first pressure-bearing surface disposed at the top, a second pressure-bearing surface disposed on the back of the first pressure-bearing surface, and a third pressure-bearing surface opposite to the second pressure-bearing surface, wherein the effective projected pressure-bearing surfaces of the second pressure-bearing surface and the third pressure-bearing surface are the same.

[0008] Further, the second pressure-bearing surface is arranged as an inclined surface, and the inclined surface is adapted to control the opening and closing of the water passage.

[0009] Further, a sliding sealing ring is arranged below the third pressure-bearing surface of the valve stem to prevent water from flowing out below the valve stem.

[0010] The present utility model further provides a faucet, which includes a body and a valve core arranged on the body, and further includes the pressure-limiting mechanism, wherein the water outlet of the valve core is communicated with the water inlet passage of the pressure-limiting mechanism.

[0011] Further, the pressure-limiting mechanism includes a mounting seat, and the valve core is adapted to be mounted on the mounting seat to control the opening and closing of the water inlet passage.

[0012] Beneficial effects:

[0013] Through this solution, it can be achieved that the water pressure in the water outlet passage of the faucet will not increase infinitely with the increase of the pressure in the water inlet passage, which can effectively protect the water outlet passage and prevent damage caused by excessive water pressure. In this solution, through the pressure-limiting mechanism, the faucet will not affect the original flow rate in a low-pressure environment, and can reduce the flow passage pressure to maintain a relatively stable numerical range when the pressure is high. Description of the drawings

[0014] Figure 1 is a schematic structural diagram of a faucet according to an embodiment of the present utility model;

[0015] Figure 2 is a schematic structural diagram of a pressure-limiting mechanism according to an embodiment of the present utility model;

[0016] Figure 3 is a schematic cross-sectional structural diagram of a pressure-limiting mechanism according to an embodiment of the present utility model;

[0017] Figure 4 is an exploded structural diagram of a pressure-limiting mechanism according to an embodiment of the present utility model;

[0018] Figure 5 is a schematic diagram of the water flow direction of a pressure-limiting mechanism according to an embodiment of the present utility model;

[0019] Figure 6 is an exploded structural diagram of a pressure limiter of a pressure-limiting mechanism according to an embodiment of the present utility model;

[0020] Figure 7It is a schematic diagram of the movement process of the valve stem of a pressure limiter of a pressure limiting mechanism according to an embodiment of the present utility model;

[0021] Figure 8 It is a schematic diagram of the valve stem structure of a pressure limiter of a pressure limiting mechanism according to an embodiment of the present utility model;

[0022] Icon: Body 1, mounting seat 2, water inlet channel 21, water outlet channel 22, valve core 3, pressure limiter 4, housing 41, valve stem 42, first pressure-bearing surface 421, second pressure-bearing surface 422, third pressure-bearing surface 423, spring 43, sliding sealing ring 44, water passing channel 45. Specific embodiments

[0023] Combined with Figure 1 As shown, this embodiment provides a faucet, including a body 1 and a valve core 3 arranged on the body 1, and further includes a pressure limiting mechanism. The water outlet of the valve core 3 is communicated with the water inlet channel 21 of the pressure limiting mechanism. The pressure limiting mechanism includes a water inlet channel 21 and a water outlet channel 22 that are adapted to communicate with each other; a pressure limiter 4 is arranged between the water inlet channel 21 and the water outlet channel 22. The pressure limiter 4 is adapted to automatically adjust the water passing cross-sectional area of the pressure limiter 4 according to the medium pressure in the water inlet channel 21 to control the water flow rate entering the water outlet channel 22, thereby limiting the pressure at the rear end of the water outlet channel 22. Further, the pressure limiting mechanism includes a mounting seat 2 adapted to mount the pressure limiter 4. The mounting seat 2 is provided with the water inlet channel 21 and the water outlet channel 22, and the water passing cross-sectional area of the water outlet channel 22 is smaller than that of the water inlet channel 21 so that the water outlet channel 22 exerts a back pressure on the pressure limiter 4. The valve core 3 is adapted to be mounted on the mounting seat 2 to control the opening and closing of the water inlet channel 21.

[0024] Combined with Figures 2 to 7 As shown, specifically, the pressure limiter 4 includes a housing 41 and a valve stem 42 and a spring 43 arranged in the housing 41; wherein, one end of the valve stem 42 is connected to the spring 43, and the other end extends out of the water outlet of the housing 41 to form the water passing channel 45 of the pressure limiter 4 with the water outlet of the housing 41. The valve stem 42 is adapted to move along the axis of the housing 41 and can automatically adjust the water passing cross-sectional area of the water passing channel 45 under the combined action of the back pressure of the water outlet channel 22 and the spring 43.

[0025] Combined with Figures 6 to 8As shown, the pressure limiter 4 is arranged inside the mounting seat 2. An installation space for the pressure limiter 4 is provided inside the mounting seat 2. The water outlet channel 22 and the water inlet channel 21 of the mounting seat 2 communicate with the installation space. The water inlet channel 21 is connected to the water outlet of the valve core 3. At the same time, the water outlet area of the water outlet channel 22 is smaller than that of the water inlet channel 21 to form a back pressure on the pressure limiter 4 at the water outlet channel 22. The valve rod 42 is arranged inside the housing 41 and is adapted to slide inside the housing 41. A sealing ring is arranged on the valve rod 42. The spring 43 is connected to the valve rod 42 to enable the valve rod 42 to have a force acting towards the water outlet channel 22. A water passing channel 45 is formed between the housing 41 and the valve rod 42. The valve rod 42 is adapted to move up and down inside the housing 41 under the combined control of the back pressure at the water outlet channel 22 and the force of the spring 43 to automatically adjust the size of the water passing channel 45, and further control the water flow rate flowing from the water passing channel 45 to the water outlet channel 22 to limit the water pressure of the water outlet channel 22.

[0026] Combined with Figures 6 to 8 As shown, in this embodiment, the valve rod 42 includes a first pressure-bearing surface 421 arranged at the top, a second pressure-bearing surface 422 arranged on the back of the first pressure-bearing surface 421, and a third pressure-bearing surface 423 opposite to the second pressure-bearing surface 422. The effective projected pressure-bearing surfaces of the second pressure-bearing surface 422 and the third pressure-bearing surface 423 are the same. The second pressure-bearing surface 422 is located above the water inlet channel 21 and is opposite to the third pressure-bearing surface 423, so that the force values generated by the water pressure on the projected surface are the same and the directions are opposite, so that the acting forces can cancel each other out. The first pressure-bearing surface 421 is arranged at the top of the valve rod 42 and is subjected to the back pressure. The acting force caused by the back pressure on the valve rod 42 is downward, opposite to the acting force of the spring 43. Therefore, when the elastic force of the spring 43 is greater than the back pressure, the valve rod 42 moves upward to increase the water passing area of the water passing channel 45. On the contrary, when the back pressure is greater than the acting force of the spring 43, the valve rod 42 moves downward under the action of the back pressure to reduce the water passing area of the water passing channel 45, and further reduce the water flow rate flowing into the water outlet channel 22 to slowly reduce the back pressure until the back pressure is the same as the acting force of the spring 43 and remains balanced. It should be noted that in this application, the second pressure-bearing surface 422 and the third pressure-bearing surface 423 are arranged as inclined surfaces, and the inclined surfaces are adapted to control the on-off of the water passing channel 45. In addition, a sliding sealing ring 44 is arranged below the third pressure-bearing surface 423 of the valve rod 42 to prevent water from flowing out from below the valve rod 42.

[0027] Combined with Figures 5 to 7As shown in the figure, when working, water flows into the mounting base 2 through the water inlet channel 21 and flows out from the water outlet channel 22 of the mounting base 2. The cross-sectional size of the water passing channel 45 is controlled by the valve stem 42. Since the water outlet channel 22 of the mounting base 2 is smaller than the water inlet channel 21, there will be a back pressure P in the water channel at the rear end of the valve stem 42. This pressure changes with the change of the cross-sectional area of the water passing channel 45 controlled by the valve stem 42. When the water inlet channel 21 is not flowing water in the initial state, the valve stem 42 moves upward under the action of the spring 43, so that the water passing channel 45 is in a relatively large opening degree and the cross-sectional area of the water passing channel 45 is relatively large. After water is passed, a back pressure P is generated at the rear end of the valve stem 42, and the force generated by the back pressure acting on the first pressure bearing surface 421 causes the valve stem 42 to move downward and the spring 43 to be compressed. As the pressure of the water inlet channel 21 increases, the back pressure P at the rear end of the valve stem 42 also increases, and the force applied to the first pressure bearing surface 421 also increases, causing the valve stem 42 to continue to move downward and compress the spring 43, resulting in a decrease in the cross-sectional area of the water passing channel 45 to limit the increase in the pressure at the rear end of the valve stem 42 until the force exerted by the back pressure P on the first pressure bearing surface 421 is close to the elastic force value of the spring 43 (the influence factor of the friction force brought by the sealing ring is ignored in this process), then the position of the valve stem 42 remains relatively stable and is in a relatively balanced state. At this time, if the pressure of the water inlet channel 21 continues to rise, it does not cause the back pressure P at the rear end of the valve stem 42 to rise; if the water pressure of the inflowing source decreases, the back pressure P at the rear end of the valve stem 42 decreases accordingly, and the elastic force of the spring 43 is greater than the back pressure and the acting force of the water inlet channel 21 on the valve stem 42, causing the valve stem 42 to move upward under the action of the spring 43, and the cross-sectional area of the water passing channel 45 increases until a new balance is maintained.

[0028] In one embodiment, the pressure limiting mechanism of this solution can be applied to the pull-out faucet mechanism, so that the pressure of the rear-end pipeline can be effectively controlled and can be stabilized within a numerical range, and the problem of unsmooth return caused by too high or increasing source pressure will no longer occur.

[0029] Through this solution, the pressure of the water outlet channel 22 can be effectively controlled, and it does not affect the water flow size in a low-pressure environment. In a high-pressure environment, it can effectively protect the water outlet pipeline and the water nozzle, etc., and improve the service life of the faucet.

[0030] It should be understood that: the above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention.

[0031] The introduction of the drawings used in the above embodiments only shows some embodiments of the present invention and should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

Claims

1. A pressure limiting mechanism, comprising a water inlet channel and a water outlet channel adapted to be connected to each other; characterized in that: A pressure limiter is arranged between the water inlet channel and the water outlet channel, and the pressure limiting mechanism includes a mounting seat suitable for installing the pressure limiter, the water inlet channel and the water outlet channel are arranged on the mounting seat, and the rear end of the water outlet channel has a water flow cross-sectional area smaller than the water inlet channel so that the water outlet channel can exert a back pressure on the pressure limiter when water passes; 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.

2. The pressure limiting mechanism according to claim 1, characterized in that: The pressure limiter 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 water outlet of the shell to form a water passage of the pressure limiter with the water 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 water passage under the combined action of the back pressure of the water outlet channel and the elastic force of the spring.

3. The pressure limiting mechanism according to claim 2, characterized in that: The valve stem includes a first pressure-bearing surface arranged at the top, a second pressure-bearing surface arranged at the back of the first pressure-bearing surface, and a third pressure-bearing surface opposite to the second pressure-bearing surface, wherein the effective projected pressure-bearing surface of the second pressure-bearing surface is the same as that of the third pressure-bearing surface.

4. The pressure limiting mechanism according to claim 3, characterized in that: The second pressure-bearing surface is configured as an inclined surface, and the inclined surface is suitable for controlling the opening and closing of the water passage.

5. The pressure limiting mechanism according to claim 3, characterized in that: The valve stem is provided with a sliding sealing ring below the third pressure-bearing surface to prevent water from flowing out from below the valve stem.

6. A faucet, comprising a body and a valve core arranged on the body, characterized in that: It also includes the pressure limiting mechanism according to any one of claims 1 to 5, wherein the water outlet of the valve core is connected to the water inlet channel of the pressure limiting mechanism.

7. The faucet according to claim 6, characterized in that: The pressure limiting mechanism comprises a mounting seat, and the valve core is suitable for being mounted on the mounting seat to control the opening and closing of the water inlet channel.

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