Regulating valve

Abstract

The utility model discloses a regulating valve, and relates to the field of dental instruments. Comprising a main valve body and a pressure relief valve body, the main valve body and the pressure relief valve body are communicated with each other, a water inlet channel is formed in the main valve body, a first valve element is arranged in the main valve body, the water inlet channel is communicated with the first valve element, the pressure relief valve body is communicated with the water inlet channel, a second valve element is arranged in the pressure relief valve body, and the second valve element is communicated with the second valve element. When the pressure of the water inlet channel is within a threshold value, the first valve element is connected, meanwhile, the second valve element is closed, and when the pressure of the water inlet channel is higher than the threshold value, the first valve element and the second valve element are opened at the same time. The device has the advantages that the device can adapt to different use environments, the use range is wider, and the flexibility is higher.

Description

Technical Field

[0001] The utility model relates to the field of dental instruments, in particular to a regulating valve. Background Art

[0002] Flushing is often required during dental surgery, so mobile phones used in dental surgery are generally equipped with a water pump. However, the water pumps used in dental surgery in related technologies do not have a water-stopping function. When the front end of the pipe is blocked, the forward pressure of the water pump will soar to the extreme, causing pipe collapse, expansion, or even bursting, causing electrical safety problems.

[0003] The diaphragm pump used has no inherent water-stopping function, causing water to continuously flow out. If a dental device with both internal and external water is mistakenly inserted into an external water contra-angle device while in internal water mode, the motor's outlet port will be blocked, as the external water contra-angle device lacks an internal water port. Therefore, when the pump is operating, the water pressure in the pipe will rapidly rise, exposing the weak link and causing significant damage to the entire device. Using a pressure sensor in the water line can detect the problem, but it is costly. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a regulating valve, which is applied in dental equipment.

[0005] The utility model is implemented by the following technical solution: a regulating valve, comprising a main valve body and a pressure relief valve body, the main valve body and the pressure relief valve body being communicated with each other, a water inlet channel being provided on the main valve body, a first valve core being provided within the main valve body, the water inlet channel being communicated with the first valve core, the pressure relief valve body being communicated with the water inlet channel, a second valve core being provided within the pressure relief valve body, when the pressure in the water inlet channel is within a threshold value, the first valve core being conducted while the second valve core being closed, and when the pressure in the water inlet channel is higher than the threshold value, the first valve core and the second valve core being opened simultaneously.

[0006] The main valve body is hollow inside to form a first installation cavity, the first valve core is installed in the first installation cavity, the first installation cavity is placed at the bottom of the main valve body, the water inlet channel is opened at the top of the main valve body and is connected to the first installation cavity, the bottom of the first installation cavity is opened to a water outlet channel, the first valve core reciprocates in the first installation cavity, and blocks the water inlet channel when the first valve core moves to the water inlet channel;

[0007] The pressure relief valve body is fixed on the outer wall of the main valve body and is placed above the first installation cavity. A second installation cavity is defined in the pressure relief valve body. The second valve core is installed in the second installation cavity. One end of the second installation cavity is communicated with the water inlet channel through the first pressure relief channel. A second pressure relief channel is defined in the pressure relief valve body. One end of the second pressure relief channel is communicated with the second installation cavity. The second valve core moves in the second installation cavity and between the first pressure relief channel and the second pressure relief channel. When the second valve core moves to contact the first pressure relief channel, it blocks the first pressure relief channel.

[0008] The first valve core includes a first push block, which contacts the inner wall of the first installation cavity, the upper end surface of the first push block is opposite to the water inlet channel, and a first spring is provided between the lower end surface of the first push block and the water outlet channel.

[0009] The second valve core includes a second push block, the second push block contacts the inner wall of the second installation cavity, the upper end surface of the second push block is opposite to the first pressure relief channel, and a second spring is provided between the lower end surface of the second push block and the second pressure relief channel, and the preload force of the second spring is greater than the preload force of the first spring.

[0010] The first installation cavity gradually shrinks toward the water inlet channel. When the first push block moves toward the water inlet channel, the side wall of the first push block presses against the inner wall of the first installation cavity. When the first push block moves toward the water outlet channel, a gap is formed between the first push block and the first installation cavity.

[0011] The second installation cavity gradually shrinks toward the first pressure relief channel. When the second push block moves toward the first pressure relief channel, the side wall of the second push block presses against the inner wall of the second installation cavity. When the second push block moves toward the second pressure relief channel, a gap is formed between the second push block and the second installation cavity.

[0012] Rubber sealing rings are provided on the outer walls of the first pushing block and the second pushing block.

[0013] Compared to existing technologies, this new design combines the functions of a check valve and a pressure relief valve in one unit, while being smaller and offering greater installation flexibility. The pressure opening values ​​of the check valve and pressure relief valve are determined by the spring preload, allowing for the selection of different springs for different applications. This allows for a wider range of applications and greater flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the regulating valve in the utility model;

[0015] Figure 2 This is a schematic cross-sectional view of the internal structure of the regulating valve in the present utility model;

[0016] In the figure: 1. Main valve body; 11. First installation cavity; 12. First valve core; 121. First push block; 122. First spring; 2. Pressure relief valve body; 21. Second installation cavity; 22. Second valve core; 221. Second push block; 222. Second spring; 3. Water inlet channel; 4. Water outlet channel; 5. First pressure relief channel; 6. Second pressure relief channel; 7. Rubber sealing ring. DETAILED DESCRIPTION

[0017] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0018] Reference Figure 1-2 A regulating valve includes a main valve body 1 and a pressure relief valve body 2. The main valve body 1 and the pressure relief valve body 2 are connected to each other. A water inlet channel 3 is provided on the main valve body 1. A first valve core 12 is provided in the main valve body 1. The water inlet channel 3 is connected to the first valve core 12. The pressure relief valve body 2 is connected to the water inlet channel 3. A second valve core 22 is provided in the pressure relief valve body 2. When the pressure in the water inlet channel 3 is within the threshold, the first valve core 12 is turned on and the second valve core 22 is closed. When the pressure in the water inlet channel 3 is higher than the threshold, the first valve core 12 and the second valve core 22 are opened at the same time. It combines the functions of a one-way valve and a pressure relief valve in one, and has a small size and high installation flexibility. The pressure opening value of the one-way valve and the pressure relief valve is determined by the preload of the spring. Different springs can be selected for assembly in response to different usage occasions, so that it can adapt to different usage environments, with a wider range of use and higher flexibility.

[0019] Reference Figure 1 and Figure 2 One implementation of the main valve body 1 is as follows: the main valve body 1 is hollow inside to form a first installation cavity 11, the first valve core 12 is installed in the first installation cavity 11, the first installation cavity 11 is placed at the bottom of the main valve body 1, the water inlet channel 3 is opened at the top of the main valve body 1 and is connected to the first installation cavity 11, the bottom of the first installation cavity 11 is opened with a water outlet channel 4, the first valve core 12 moves back and forth in the first installation cavity 11, and the first valve core 12 blocks the water inlet channel 3 when it moves to one side of the water inlet channel 3.

[0020] On the basis of the above-mentioned main valve body 1, the first installation cavity 11 gradually shrinks toward the water inlet channel 3. The first valve core 12 includes a first push block 121. The first push block 121 contacts the inner wall of the first installation cavity 11. The upper end face of the first push block 121 is opposite to the water inlet channel 3. A first spring 122 is provided between the lower end face of the first push block 121 and the water outlet channel 4. When the first push block 121 moves toward the water inlet channel 3, the side wall of the first push block 121 presses against the inner wall of the first installation cavity 11. When the first push block 121 moves toward the water outlet channel 4, a gap is formed between the first push block 121 and the first installation cavity 11. In order to improve the sealing performance, an annular groove can be provided on the surface of the first push block 121 for installing the rubber sealing ring 7. The rubber sealing ring 7 is directly engaged in the annular groove. After the side wall of the first push block 121 presses against the inner wall of the first installation cavity 11, the rubber sealing ring 7 is deformed, and the sealing performance is better. The force that presses the first push block 121 against the water inlet channel 3 comes from the first spring 122, that is, one end of the first spring 122 needs to abut against the first push block 121, and the other end of the first spring 122 abuts against the connection between the water outlet channel 4 and the first installation cavity 11, and in the initial state, the first spring 122 has a certain pre-tightening force so that the first push block 121 can always press against the water inlet channel 3 to block the water inlet channel 3 when there is no water flow passing through.

[0021] One installation method of the pressure relief valve body 2 is: the pressure relief valve body 2 is fixed on the outer wall of the main valve body 1 and is placed above the first installation cavity 11, a second installation cavity 21 is opened in the pressure relief valve body 2, and the second valve core 22 is installed in the second installation cavity 21, one end of the second installation cavity 21 is connected with the water inlet channel 3 through the first pressure relief channel 5, a second pressure relief channel 6 is opened on the pressure relief valve body 2, one end of the second pressure relief channel 6 is connected with the second installation cavity 21, the second valve core 22 moves in the second installation cavity 21 and the second valve core 22 moves between the first pressure relief channel 5 and the second pressure relief channel 6, and when the second valve core 22 moves to contact the first pressure relief channel 5, it blocks the first pressure relief channel 5.

[0022] The second installation cavity 21 is used to install the second valve core 22. Specifically in this embodiment, the second installation cavity 21 gradually shrinks toward the first pressure relief channel 5. In this embodiment, the second valve core 22 includes a second push block 221. The second push block 221 contacts the inner wall of the second installation cavity 21. The upper end face of the second push block 221 is opposite to the first pressure relief channel 5. A second spring 222 is provided between the lower end face of the second push block 221 and the second pressure relief channel 6. A rubber sealing ring 7 is also provided on the outer wall of the second push block 221. Specifically, in order to improve the sealing performance, an annular groove can be provided on the surface of the first push block 121 for installing the rubber sealing ring 7. The rubber sealing ring 7 is directly engaged in the annular groove. After the side wall of the first push block 121 is pressed against the inner wall of the first installation cavity 11, the rubber sealing ring 7 is deformed, and the sealing performance is better. When the second push block 221 moves toward the first pressure relief channel 5, the side wall of the second push block 221 presses against the inner wall of the second mounting cavity 21. When the second push block 221 moves toward the second pressure relief channel 6, a gap is formed between the second push block 221 and the second mounting cavity 21. When the side wall of the second push block 221 presses against the inner wall of the second mounting cavity 21, the corresponding rubber sealing ring 7 will deform, ultimately improving the sealing performance. The force that presses the second push block 221 against the water inlet channel 3 comes from the second spring 222, that is, one end of the second spring 222 needs to press against the second push block 221, and the other end of the second spring 222 presses against the connection between the second pressure relief channel 6 and the second mounting cavity 21. In the initial state, the second spring 222 has a certain preload force, so that when there is no water flowing through, the second push block 221 can always press against the second pressure relief channel 6 to block the water inlet channel 3. The preload force of the second spring 222 is greater than the preload force of the first spring 122. Therefore, when the first push block 121 is subjected to excessive water pressure, the second push block 221 can be pushed open to release the pressure.

[0023] When the regulating valve is in use, water flows into the main valve body 1 from the water inlet channel 3. In the initial state, the first push block 121 is pressed against the water inlet channel 3, so that the water cannot enter the first installation cavity 11. As the water flows in continuously, the water pressure increases, and eventually overcomes the preload force provided by the first spring 122, pushing the first push block 121 to move, so that the water can flow normally through the water outlet channel 4. At this time, the pressure of the water flow is within the pressure threshold, and the pressure at this time is not enough to push the second spring 222, that is, the second push block 221 always blocks the first pressure relief channel 5, and the regulating valve can be used normally.

[0024] When the pressure on the regulating valve is too great and the first push block 121 has moved to the end of the first installation chamber 11 but still cannot balance the pressure, the pressure in the first installation chamber 11 will suddenly increase, and the first installation chamber 11 is actually connected to the second installation chamber 21. When the water pressure exceeds the safety threshold, the second push block 221 is pushed by the water pressure, and the excess water pressure causes the first pressure relief channel 5 to be opened, and the water pressure is discharged from the first pressure relief channel 5, the second installation chamber 21 and the second pressure relief channel 6, which makes it safer.

[0025] Compared to existing technologies, this new design combines the functions of a check valve and a pressure relief valve in one unit, while being smaller and offering greater installation flexibility. The pressure opening values ​​of the check valve and pressure relief valve are determined by the spring preload, allowing for the selection of different springs for different applications. This allows for a wider range of applications and greater flexibility.

[0026] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A regulating valve, comprising a main valve body and a pressure relief valve body, characterized in that: The main valve body and the pressure relief valve body are connected to each other. A water inlet channel is provided on the main valve body. A first valve core is provided in the main valve body. The water inlet channel is connected to the first valve core. The pressure relief valve body is connected to the water inlet channel. A second valve core is provided in the pressure relief valve body. When the pressure in the water inlet channel is within a threshold value, the first valve core is turned on and the second valve core is closed. When the pressure in the water inlet channel is higher than the threshold value, the first valve core and the second valve core are opened at the same time.

2. A regulating valve according to claim 1, characterized in that: The main valve body is hollow inside to form a first installation cavity, the first valve core is installed in the first installation cavity, the first installation cavity is placed at the bottom of the main valve body, the water inlet channel is opened at the top of the main valve body and is connected to the first installation cavity, the bottom of the first installation cavity is opened to a water outlet channel, the first valve core reciprocates in the first installation cavity, and blocks the water inlet channel when the first valve core moves to the water inlet channel; The pressure relief valve body is fixed on the outer wall of the main valve body and is placed above the first installation cavity. A second installation cavity is defined in the pressure relief valve body. The second valve core is installed in the second installation cavity. One end of the second installation cavity is communicated with the water inlet channel through the first pressure relief channel. A second pressure relief channel is defined in the pressure relief valve body. One end of the second pressure relief channel is communicated with the second installation cavity. The second valve core moves in the second installation cavity and between the first pressure relief channel and the second pressure relief channel. When the second valve core moves to contact the first pressure relief channel, it blocks the first pressure relief channel.

3. A regulating valve according to claim 2, characterized in that: The first valve core includes a first push block, which contacts the inner wall of the first installation cavity, the upper end surface of the first push block is opposite to the water inlet channel, and a first spring is provided between the lower end surface of the first push block and the water outlet channel.

4. A regulating valve according to claim 3, characterized in that: The second valve core includes a second push block, the second push block contacts the inner wall of the second installation cavity, the upper end surface of the second push block is opposite to the first pressure relief channel, and a second spring is provided between the lower end surface of the second push block and the second pressure relief channel, and the preload force of the second spring is greater than the preload force of the first spring.

5. The regulating valve according to claim 3, characterized in that: The first installation cavity gradually shrinks toward the water inlet channel. When the first push block moves toward the water inlet channel, the side wall of the first push block presses against the inner wall of the first installation cavity. When the first push block moves toward the water outlet channel, a gap is formed between the first push block and the first installation cavity.

6. The regulating valve according to claim 4, characterized in that: The second installation cavity gradually shrinks toward the first pressure relief channel. When the second push block moves toward the first pressure relief channel, the side wall of the second push block presses against the inner wall of the second installation cavity. When the second push block moves toward the second pressure relief channel, a gap is formed between the second push block and the second installation cavity.

7. The regulating valve according to claim 4, characterized in that: Rubber sealing rings are provided on the outer walls of the first pushing block and the second pushing block.

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