Pressure-stabilizing shutoff valve for negative-pressure or zero-pressure environment

Abstract

The utility model provides a pressure stabilizing shutoff valve for negative pressure or zero pressure environment, which comprises a valve body, a gland arranged on the valve body, a support shaft, an elastic element and a diaphragm component, the support shaft penetrates through the valve body to form a liquid channel in a matching way, one end of the support shaft is provided with the diaphragm component, and the other end of the support shaft is provided with the elastic element. The supporting shaft is matched with the valve body in an attached mode under the action of the elastic element. The elastic element is arranged at one end of the supporting shaft, and the diaphragm assembly is arranged at the other end of the supporting shaft, so that the position of the supporting shaft can be dynamically adjusted up and down, the optimal opening state of a liquid channel is achieved, the pressure of front-end primary pressure is offset on the supporting shaft, and the diaphragm assembly and a rear-end pump are only subjected to the pressure effect of rear-end secondary pressure; the common diaphragm and the common power pump can adapt to scenes with different water pressure changes, the product performance and reliability are improved, the working process is free of high-frequency vibration and noise, and the use experience of a user is improved.

Description

[Technical field]

[0001] The utility model relates to a liquid flow control valve, in particular to a pressure-stabilizing shutoff valve used in a negative pressure or zero pressure environment. [Background technology]

[0002] At present, all-in-one water purifiers have become more and more popular, especially the emergence of all-in-one water purifiers and heat purifiers, which can produce both room temperature water and hot water at different temperatures. To obtain hot water at different temperatures, different flow rates need to be adjusted (because the maximum amount of hot water can be obtained as much as possible, and the heating power is kept at the maximum). Traditional all-in-one water purifiers and heat purifiers use a combination of a water tank and a pump, and the water volume is adjusted by the working power of the pump. Such a structure is not only costly, but also has a large water tank volume and occupies a large space. In addition, the water tank is easily contaminated, causing drinking water safety problems.

[0003] In order to solve the above problems, Chinese patent CN112833227A proposes a quantitative suction and pressure valve, which adopts a water pressure diaphragm, a central flow guide hole, a sealing column, a pneumatic diaphragm and other structures. Raw water flows in from the water inlet. Since the central flow guide hole of the water pressure diaphragm is blocked by the sealing column, the pressurized raw water is blocked and the water cannot pass through the water pressure diaphragm to flow to the suction and outlet. After the suction and outlet are subjected to the suction pressure of the water pump, the pneumatic diaphragm drives the ejector pin to move upward, and the ejector pin pushes the sealing column upward, thereby opening the central flow guide hole. The pressure at the upper and lower ends of the water pressure diaphragm is balanced, and water can flow out smoothly from the suction and outlet. Although this structure eliminates the water tank and prevents pollution, the water pressure diaphragm has a force after leaving the valve port, generating resonance, and the water flow will impact the pneumatic diaphragm, resulting in problems such as poor water discharge and resonance.

[0004] Chinese patent CN114526368A proposes a negative pressure valve. The valve body is equipped with a pneumatic diaphragm in the air chamber. The pneumatic diaphragm separates the air chamber into an upper air chamber and a lower air chamber. The upper air chamber is connected to the water outlet, and the lower air chamber is connected to the outside air. The pneumatic diaphragm can move upward through the upper top structure to drive the valve plug to move upward, thereby opening the valve port to realize direct connection between the water inlet and the water outlet, and the water outlet is smooth, and the resonance problem is solved. However, this solution still has the following shortcomings:

[0005] 1. When the pressure at the front end of the negative pressure valve increases, the power of the pump at the rear end needs to be increased accordingly to open the negative pressure valve. If the power of the pump is not large enough, the negative pressure valve may not be opened. The water pressure at the front end of the water dispenser varies in different scenarios, which results in either high-power pumps being used on all machines, resulting in increased costs, or ordinary power pumps being used, which may cause problems such as the pump not being able to open in some scenarios;

[0006] 2. At the same time, when the front-end pressure of the negative pressure valve increases, the size and strength of the diaphragm also need to be adjusted accordingly. The size and strength of the diaphragm on the water dispenser are fixed. Only under specific front-end water pressure conditions can the optimal effect be achieved. If the water pressure is too high or too low, the opening and closing performance and service life will be affected.

[0007] 3. The high-frequency vibration of the diaphragm in this structure will generate noise, affecting the user experience, and the flow stabilization effect is poor. [Contents of the utility model]

[0008] The purpose of the utility model is to solve the problems in the prior art and provide a pressure-stabilizing shut-off valve for use in a negative pressure or zero pressure environment, which can stabilize pressure and flow. Regardless of the front-end pressure, the rear-end pump can be turned on, and there are no specific requirements for the size and strength of the diaphragm. At the same time, it will not generate noise, which can improve the user experience.

[0009] To achieve the above-mentioned purpose, the utility model proposes a pressure-stabilizing shut-off valve for use in a negative pressure or zero pressure environment, comprising a valve body, a pressure cover installed on the valve body, a support shaft, an elastic element, and a diaphragm assembly. The support shaft passes through the valve body to form a liquid channel, and a diaphragm assembly is installed at one end of the support shaft. The support shaft fits with the valve body under the action of the elastic element.

[0010] Preferably, the elastic element may be installed at the other end of the support shaft or other suitable position capable of driving the support shaft to move.

[0011] Preferably, a conical valve core is provided on the support shaft, and a valve hole is opened on the valve body to cooperate with the conical valve core. The conical valve core and the valve hole cooperate to form a liquid channel 6 whose size can change with the support shaft. The front end of the liquid channel is a water inlet chamber, and the rear end is a water outlet chamber for stable pressure and flow.

[0012] Preferably, the diaphragm assembly comprises a diaphragm and a pressing plate, the support shaft is provided with a mounting convex ring, the diaphragm is fixedly mounted on the pressing plate, and the pressing plate and the mounting convex ring are mounted on the support shaft in cooperation.

[0013] Preferably, the diaphragm assembly comprises a diaphragm and two pressing plates, a mounting convex ring is provided on the support shaft, the diaphragm is fixedly mounted between the two pressing plates, and the lower pressing plate is mounted on the support shaft in cooperation with the mounting convex ring.

[0014] Preferably, a switch valve is also provided at the front end of the valve body.

[0015] Preferably, the support shaft is further provided with an opening and closing seal, which is arranged at the conical valve core of the support shaft and can realize the opening or closing of the liquid channel between the conical valve core and the valve hole.

[0016] Preferably, it further comprises a valve seat, a valve cavity is defined in the valve seat, the elastic element is installed in the valve cavity of the valve seat, one end of the support shaft connected to the elastic element is installed in the valve seat, and the valve seat is installed in cooperation with the valve body.

[0017] Preferably, a feedback hole is provided in the support shaft, and the feedback hole is a through hole that connects the steady-pressure and steady-flow water outlet cavity with the valve cavity.

[0018] Preferably, the valve body further comprises a first seal and a second seal. The first seal is arranged between the support shaft and the valve seat, and the second seal is arranged between the valve seat and the valve body.

[0019] The beneficial effects of the utility model are as follows: the utility model provides an elastic element at one end of the support shaft and a diaphragm assembly at the other end, so that the support shaft can dynamically adjust its position up and down, thereby achieving the optimal opening state of the liquid channel, so that the pressure of the primary pressure at the front end is offset on the support shaft, and the diaphragm assembly and the rear end pump are only affected by the pressure of the secondary pressure at the rear end. Ordinary diaphragms and ordinary power pumps can be used to adapt to scenarios with different water pressure changes, thereby improving product performance and reliability, and there is no high-frequency vibration or noise during the working process, thereby improving the user experience.

[0020] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0021] Figure 1 This is a front view of a first embodiment of a pressure-stabilizing shutoff valve for use in a negative pressure or zero pressure environment according to the utility model;

[0022] Figure 2 This is a stereoscopic diagram of a first embodiment of a pressure-stabilizing shutoff valve for use in a negative pressure or zero pressure environment according to the utility model;

[0023] Figure 3 This is a cross-sectional view of an initial state of a first embodiment of a pressure-stabilizing shutoff valve for a negative pressure or zero pressure environment of the utility model;

[0024] Figure 4 It is a partial cross-sectional view of the initial state of the first embodiment of the pressure-stabilizing shutoff valve for negative pressure or zero pressure environment of the utility model;

[0025] Figure 5 This is a cross-sectional view of a working state of a first embodiment of a pressure-stabilizing shutoff valve for a negative pressure or zero pressure environment of the utility model;

[0026] Figure 6 It is a partial cross-sectional view of the working state of the first embodiment of the pressure-stabilizing shutoff valve used in a negative pressure or zero pressure environment of the utility model;

[0027] Figure 7 This is a front view of a second embodiment of a pressure-stabilizing shutoff valve for use in a negative pressure or zero pressure environment according to the utility model;

[0028] Figure 8 This is a stereoscopic diagram of a second embodiment of a pressure-stabilizing shutoff valve for use in a negative pressure or zero pressure environment according to the utility model;

[0029] Fig. 9 This is a cross-sectional view of the initial state of the second embodiment of the pressure-stabilizing shutoff valve of the utility model for negative pressure or zero pressure environment;

[0030] Fig.10 It is a cross-sectional view of the working state of the second embodiment of the pressure-stabilizing shutoff valve of the utility model used in a negative pressure or zero pressure environment.

[0031] In the figure: 1-valve body; 11-valve hole; 2-pressure cover; 3-support shaft; 31-conical valve core; 32-mounting convex ring; 33-opening and closing seal; 34-first seal; 35-feedback hole; 4-elastic element; 5-diaphragm assembly; 51-diaphragm; 52-pressing plate; 53-bending part; 6-liquid channel; 7-water inlet chamber; 8-pressure and flow stabilizing water outlet chamber; 9-on-off valve; 10-valve seat; 101-second seal; 102-valve chamber; 12-water inlet; 13-water outlet. [Specific implementation method]

[0032] Embodiment 1:

[0033] See also Figure 1 , 2 , 3, 4, 5, 6, a pressure-stabilizing shutoff valve for negative pressure or zero pressure environment, a switch valve 9 is provided at the front end of the valve body 1, the valve body 1 is provided with a water inlet 12 and a water outlet 13, the pressure-stabilizing and flow-stabilizing part includes a valve body 1, a gland 2 installed on the valve body 1, a support shaft 3, an elastic element 4, and a diaphragm assembly 5, the support shaft 3 passes through the valve body 1 to form a liquid channel 6, one end of the support shaft 3 is installed with a diaphragm assembly 5, the support shaft 3 can fit with the valve body 1 under the action of the elastic element 4, and the elastic element 4 can be installed at the other end of the support shaft or other suitable position that can drive the support shaft 3 to move. A conical valve core 31 is provided on the support shaft 3, a valve hole 11 is opened on the valve body 1 to be installed with the conical valve core 31, and the conical valve core 31 cooperates with the valve hole 11 to form a liquid channel 6 that can change in size with the support shaft 3, the front end of the liquid channel 6 is a water inlet chamber 7, and the rear end is a pressure-stabilizing and flow-stabilizing water outlet chamber 8. The elastic element 4 is a spring. It also includes a valve seat 10, a valve cavity 102 is formed in the valve seat 10, the elastic element 4 is installed in the valve cavity 102 of the valve seat 10, the end of the support shaft 3 connected to the elastic element 4 is installed in the valve seat 10, and the valve seat 10 is installed in cooperation with the valve body 1. The support shaft 3 fits with the valve body 1 under the action of the elastic element 4.

[0034] In this embodiment, since there is a rigid contact between the valve body 1 and the support shaft 3, only the size of the gap between the two can be adjusted, the gap cannot be eliminated, and complete closure cannot be achieved. Therefore, a switch valve 9 is provided at the front end of the valve body 1 to achieve complete closure of the channel.

[0035] In this embodiment, the diaphragm assembly 5 includes a diaphragm 51 and a pressing sheet 52. The support shaft 3 is provided with a mounting convex ring 32. The diaphragm 51 is fixedly mounted on the pressing sheet 52. The pressing sheet 52 is mounted on the support shaft 3 in cooperation with the mounting convex ring 32. A bending portion 53 is also provided on the outer periphery of the pressing sheet 52. In this embodiment, the diaphragm assembly 5 uses a single pressing sheet 52, and the diaphragm 51 can be fixed by mounting it on the pressing sheet 52.

[0036] In this embodiment, a feedback hole 35 is also opened in the support shaft 3. The feedback hole 35 is a through hole that connects the pressure-stabilizing and flow-stabilizing water outlet chamber 8 with the valve chamber 102. The feedback hole 35 transmits the pressure of the pressure-stabilizing and flow-stabilizing water outlet chamber 8 to the valve chamber 102 where the elastic element 4 is installed under the support shaft 3, thereby starting the secondary pressure feedback effect.

[0037] In order to achieve system sealing, a first sealing member 34 and a second sealing member 101 are also included. The first sealing member 34 is provided between the support shaft 3 and the valve seat 10 , and the second sealing member 101 is provided between the valve seat 10 and the valve body 1 .

[0038] See also Figure 4 In the initial state, the switch valve 9 is closed. Under the action of the elastic element 4, the support shaft 3 is located in the upper position, and the conical valve core 31 is in contact with the valve hole 11 of the valve body 1. Due to the rigid contact between the two, there is a small gap, namely the liquid channel 6. Due to the action of the elastic element 4, the water pressure is relatively small during the initial water outlet, which meets the initial small flow requirement.

[0039] See also Figure 6When the switch valve 9 is opened, the water flow in the water inlet chamber 7 flows into the pressure-stabilizing and flow-stabilizing water outlet chamber 8 through the liquid channel 6. When the water flows through the liquid channel 6, it will continuously squeeze the support shaft 3 downward. At this time, the support shaft 3 will overcome the effect of the elastic element 4 and move downward. Because the conical valve core 31 is a conical shape with a small top and a large bottom, the liquid channel 6 continues to increase, and the water pressure increases. As the water pressure increases, the diaphragm assembly 5 is affected by the water pressure in the pressure-stabilizing and flow-stabilizing water outlet chamber 8 and will move upward. Because the diaphragm assembly 5 is fixedly mounted on the support shaft 3, the support shaft 3 will also move upward with the diaphragm assembly 5. The liquid channel 6 will be reduced at this time, thereby reducing the water pressure and automatically and dynamically adjusting the gap size (i.e., the size of the liquid channel 6), thereby achieving that no matter how large the water pressure is in the water inlet chamber 7, the water pressure in the pressure-stabilizing and flow-stabilizing water outlet chamber 8 is stable, achieving the effect of pressure stabilization and flow stabilization, and making the secondary water outlet pressure at the rear end constant. Not only is the requirement for the diaphragm assembly 5 reduced, but there is also no special requirement for the power of the rear end pump. Even a low-power pump can achieve water outlet flow regulation.

[0040] When the switch valve 9 is closed again, the water flow in the liquid channel 6 continues to decrease. Due to the action of the elastic element 4, the elastic force of the elastic element 4 squeezes the support shaft 3 upward, so that the support shaft 3 contacts the valve hole 11 of the valve body 1 and returns to the initial state.

[0041] Embodiment 2:

[0042] See also Figure 7 , 8 , 9, 10, in this embodiment, the switch valve 9 is cancelled, and an opening and closing seal 33 is provided on the support shaft 3. The opening and closing seal 33 can be an O-ring. The opening and closing seal 33 is provided at the conical valve core 31 of the support shaft 3, and can realize the opening or closing of the liquid channel 6 between the conical valve core 31 and the valve hole 11. Under the action of the elastic element 4, the opening and closing seal 33 is sealed between the conical valve core 31 and the valve hole 11, and the liquid channel 6 can be completely closed, thereby realizing the complete closing function of the channel. This structural design cancels the design of the switch valve 9, greatly reducing the cost, and the channel opening and closing and flow rate adjustment functions are not affected.

[0043] See also Fig. 9 , 10 In this embodiment, the diaphragm assembly 5 includes a diaphragm 51 and two pressing plates 52. The support shaft 3 is provided with a mounting convex ring 32. The diaphragm 51 is fixedly mounted between the two pressing plates 52. The lower pressing plate 52 cooperates with the mounting convex ring 32 to be mounted on the support shaft 3. This structure can better fix the diaphragm 51 and extend its service life.

[0044] See also Fig. 9 , 10The working principle of this embodiment is similar to that of the first embodiment, except that the existence of the opening and closing seal 33 can achieve complete closure of the liquid channel 6, so the switch valve 9 can be eliminated, simplifying the structure and reducing the cost.

[0045] It should be noted that the valve structure of this patent is not only applicable to water dispensers, but also to other electrical appliances that require flow regulation. The above embodiments are descriptions of the utility model, not limitations of the utility model. Any solution that is a simple transformation of the utility model falls within the scope of protection of the utility model.

Claims

1. A pressure-stabilizing shutoff valve for use in a negative pressure or zero pressure environment, comprising a valve body (1), a gland (2) mounted on the valve body (1), Features: It also includes a support shaft (3), an elastic element (4), and a diaphragm assembly (5); the support shaft (3) passes through the valve body (1) to form a liquid channel (6); one end of the support shaft (3) is installed with the diaphragm assembly (5); the support shaft (3) fits with the valve body (1) under the action of the elastic element (4).

2. The pressure-stabilizing shutoff valve for negative pressure or zero pressure environment according to claim 1, Features: The support shaft (3) is provided with a conical valve core (31), and the valve body (1) is provided with a valve hole (11) which is mounted in cooperation with the conical valve core (31). The conical valve core (31) and the valve hole (11) cooperate to form a liquid channel (6) whose size can change with the support shaft (3), and the front end of the liquid channel (6) is a water inlet chamber (7), and the rear end is a pressure-stabilizing and flow-stabilizing water outlet chamber (8).

3. The pressure-stabilizing shutoff valve for negative pressure or zero pressure environment according to claim 1, Features: The diaphragm assembly (5) comprises a diaphragm (51) and a pressing plate (52); a mounting convex ring (32) is provided on the support shaft (3); the diaphragm (51) is fixedly mounted on the pressing plate (52); and the pressing plate (52) and the mounting convex ring (32) are mounted on the support shaft (3) in cooperation.

4. The pressure-stabilizing shutoff valve for negative pressure or zero pressure environment according to claim 1, Features: The diaphragm assembly (5) comprises a diaphragm (51) and two pressing plates (52); a mounting convex ring (32) is provided on the support shaft (3); the diaphragm (51) is fixedly mounted between the two pressing plates (52); and the lower pressing plate (52) is mounted on the support shaft (3) in cooperation with the mounting convex ring (32).

5. The pressure-stabilizing shutoff valve for negative pressure or zero pressure environment according to claim 1, Features: A switch valve (9) is also provided at the front end of the valve body (1).

6. The pressure-stabilizing shutoff valve for negative pressure or zero pressure environment according to claim 2, Features: The support shaft (3) is also provided with an opening and closing seal (33), which is arranged at the conical valve core (31) of the support shaft (3) and can realize the opening or closing of the liquid channel (6) between the conical valve core (31) and the valve hole (11).

7. A pressure-stabilizing shutoff valve for use in a negative pressure or zero pressure environment according to any one of claims 1 to 6, Features: It also includes a valve seat (10), a valve cavity (102) is opened in the valve seat (10), the elastic element (4) is installed in the valve cavity (102) of the valve seat (10), one end of the support shaft (3) connected to the elastic element (4) is installed in the valve seat (10), and the valve seat (10) is installed in coordination with the valve body (1).

8. The pressure-stabilizing shutoff valve for negative pressure or zero pressure environment according to claim 7, Features: A feedback hole (35) is also provided in the support shaft (3), and the feedback hole (35) is a through hole that connects the pressure-stabilizing and flow-stabilizing water outlet cavity (8) with the valve cavity (102).

9. The pressure-stabilizing shutoff valve for negative pressure or zero pressure environment according to claim 7, Features: It also comprises a first sealing member (34) and a second sealing member (101), wherein the first sealing member (34) is arranged between the support shaft (3) and the valve seat (10), and the second sealing member (101) is arranged between the valve seat (10) and the valve body (1).

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