Pressure regulating valve

Abstract

The present application relates to a kind of pressure regulating valves, including valve body, the liquid inlet channel, chamber one, liquid outlet channel are equipped in the valve body, the one-way valve is equipped in the liquid outlet channel, the relief passage and installation cavity are further equipped in the valve body, the relief passage and installation cavity are respectively located at the two sides of chamber one and all are communicated with chamber one;Valve stem is slidably connected in the installation cavity, the end of the valve stem passes through chamber one and extends into relief passage, the end of the valve stem extending into relief passage is equipped with plugging block, the plugging block is used to block the channel mouth of relief passage and chamber one is communicated, elastic member is equipped in the installation cavity, and the elastic force of the elastic member acts on valve stem, always drives valve stem towards relief passage movement.The present application can automatically discharge the gas in the valve body when the valve body is used, reduces the occurrence of cavitation phenomenon.

Description

Technical Field

[0001] This invention relates to the field of valves, and in particular to a pressure regulating valve. Background Technology

[0002] Chinese patent CN114251494B discloses a fully unloading pressure regulating valve, which ingeniously utilizes the water pressure change in the internal channel of the valve after the spray component is closed or opened to achieve automatic pressure relief and reset; by setting a micro switch and a pin, the external power machine can be automatically started and closed when the spray component is closed or opened, saving energy consumption, which is also quite ingenious.

[0003] However, the pressure regulating valve cannot expel air from the valve body during startup. After startup, the residual gas inside the valve body easily forms bubbles. These bubbles burst rapidly in the high-pressure area, generating high-frequency vibrations and impact forces, which may damage the valve body structure or sealing elements. Summary of the Invention

[0004] This application provides a pressure regulating valve that can automatically discharge gas inside the valve body during use, thereby reducing cavitation.

[0005] The pressure regulating valve provided in this application adopts the following technical solution:

[0006] A pressure regulating valve includes a valve body, which has an inlet channel, a first chamber, and an outlet channel. A one-way valve is installed in the outlet channel. The valve body also has a pressure relief channel and an installation cavity. The pressure relief channel and the installation cavity are located on opposite sides of the first chamber and are both connected to it. A valve stem is slidably connected within the installation cavity. The end of the valve stem passes through the first chamber and extends into the pressure relief channel. A sealing block is provided on the end of the valve stem extending into the pressure relief channel. The sealing block is used to block the opening connecting the pressure relief channel and the first chamber. An elastic element is provided within the installation cavity. The elastic force of the elastic element acts on the valve stem, constantly driving the valve stem to move towards the pressure relief channel.

[0007] Preferably, the elastic element is a spring, the valve stem includes a rod body and a slide, the slide has an annular groove, the spring is located on the side of the slide away from the chamber and is sleeved on the rod body, one end of the spring abuts against the side wall of the mounting cavity away from the chamber, and the other end of the spring extends into the annular groove and abuts against the slide.

[0008] Preferably, the valve body has a reflux channel that connects the liquid outlet channel and the mounting cavity. The opening of the reflux channel that connects to the mounting cavity is located on the side of the slide away from the cavity, and the opening of the channel will not be blocked during the sliding of the slide.

[0009] Preferably, the one-way valve comprises a valve seat, a valve head slidingly connected to the valve seat, a spring two arranged in the valve seat, the spring two being used to press the valve head against a passage opening of a liquid outlet channel and a chamber one to seal the passage opening; the valve head is provided with a first perforation and a second perforation, the valve seat is provided with a third perforation; in the initial state, the valve seat seals the first perforation, and the second perforation is connected to a backflow channel; when the valve head moves into the valve seat, the first perforation is connected to the third perforation, and the backflow channel is connected to the liquid outlet channel.

[0010] Preferably, a micro switch for controlling the opening and closing of an external power device is arranged at the bottom of the valve body, and a triggering mechanism is slidingly connected in the valve body; when the sealing block moves away from the chamber one, the triggering mechanism is pushed to move, so that the triggering mechanism abuts against the micro switch.

[0011] Preferably, the triggering mechanism comprises a trigger rod slidingly connected in the valve body and a spring three arranged in the valve body, the trigger rod is located between the micro switch and the sealing block; the spring three is sleeved on the trigger rod, one end of the spring three abuts against the valve body, and the other end of the spring three abuts against the trigger rod; the spring three always drives the trigger rod to move towards the chamber one, and the elastic force of the spring three is smaller than that of the spring one.

[0012] Preferably, the valve body is provided with an adjusting cavity, the adjusting cavity is connected to the mounting cavity, the adjusting cavity is located on the side of the mounting cavity away from the chamber one, the end of the rod body extends into the adjusting cavity, and a adjusting pin is threadedly connected in the adjusting cavity and extends out of the valve body.

[0013] The technical effects of the present application mainly embody in the following aspects:

[0014] 1. In the initial stage of use of the valve body, when external water flows into the valve body, the air in the valve body is extruded out through the pressure relief channel; in the later stage, when the water pressure in the valve body increases, the water flow pushes the valve rod and the sealing block to move upwards to isolate the chamber one from the pressure relief channel;

[0015] 2. When the external spraying part is closed, the high-pressure water flow flows back, enters the mounting cavity one through the backflow channel, and the pressure of the backflow water is greater than that of the water in the chamber one, so that the backflow water in the mounting cavity one pushes the sliding seat to move close to the chamber one, so that the sealing block no longer seals the passage opening of the pressure relief channel connected to the chamber one, and the water in the valve body can be discharged from the pressure relief channel

[0016] 3. The present application improves the structure of the valve body, replaces the pressure regulating spring in the comparative document with the spring one, and the pressure regulating spring in the comparative document has the defects of difficult pressure regulation and difficult installation, while the spring one in the present application only needs to ensure that the elastic force of the spring one is smaller than the internal pressure of the valve body during work, and the spring one can be selected from a large number of options and is easy to install. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the valve body without the micro switch installed.

[0018] Figure 2 is a structural sectional view of the valve body without the micro switch installed.

[0019] Figure 3 is Figure 1 a structural schematic diagram of the valve body in use.

[0020] Figure 4 is Figure 3 a partial enlarged view of A in the case.

[0021] Figure 5 is a structural schematic diagram of the one-way valve.

[0022] Figure 6 is Figure 5 a sectional view of the one-way valve along line B-B in the case.

[0023] Figure 7 is a structural schematic diagram of the valve seat.

[0024] Figure 8 is a structural schematic diagram of the valve head.

[0025] Reference signs: 1, valve body; 11, liquid inlet channel; 12, chamber one; 13, liquid outlet channel; 14, pressure relief channel; 15, installation cavity; 16, backflow channel; 17, micro switch; 18, adjusting cavity; 19, adjusting plug; 2, one-way valve; 21, valve seat; 211, sliding groove; 22, valve head; 221, sliding block; 23, spring two; 24, perforation one; 25, perforation two; 26, perforation three; 3, valve rod; 31, rod body; 32, sliding seat; 33, ring groove; 4, blocking block; 5, elastic member; 51, spring one; 6, touch mechanism; 61, touch rod; 62, spring three. DETAILED DESCRIPTION

[0026] The application will be further described in detail below with reference to the accompanying drawings, so that the technical scheme of the present application is easier to understand and master.

[0027] With reference to Figure 1 and Figure 2 , the pressure regulating valve of the embodiment comprises a valve body 1, which is provided with a liquid inlet channel 11, a chamber one 12, and a liquid outlet channel 13 that are in communication with each other. The valve body 1 is further provided with a pressure relief channel 14 and an installation cavity 15, which are respectively located on both sides of the chamber one 12 and are in communication with the chamber one 12.

[0028] With reference to Figure 2, the valve stem 3 is arranged in the mounting cavity 15, the valve stem 3 comprises a stem body 31 and a sliding seat 32, the sliding seat 32 is slidably connected in the mounting cavity 15, and one end of the valve stem 3 penetrates the cavity one 12 and extends into the pressure relief channel 14. An end of the valve stem 3 extending into the pressure relief channel 14 is provided with a blocking block 4. The diameter of the blocking block 4 is greater than the diameter of a channel opening through which the exhaust channel is communicated with the cavity one 12. When the sliding seat 32 and the stem body 31 are driven to move away from the pressure relief channel 14 by an external force, the blocking block 4 is driven to move, and the blocking block 4 blocks the channel opening through which the pressure relief channel 14 is communicated with the cavity one 12.

[0029] With reference to Figure 2 , the mounting cavity 15 is provided with an elastic member 5, the elastic force of the elastic member 5 acts on the sliding seat 32, and the sliding seat 32 is always driven to move towards the pressure relief channel 14. The sliding seat 32 is provided with a ring groove 33, the spring one 51 is located on a side of the sliding seat 32 away from the cavity one 12 and is sleeved on the stem body 31, one end of the spring one 51 abuts against a side wall of the mounting cavity 15 away from the cavity one 12, and the other end of the spring one 51 extends into the ring groove 33 and abuts against the sliding seat 32.

[0030] With reference to Figure 2 , the valve body 1 is provided with an adjusting cavity 18, the adjusting cavity 18 is communicated with the mounting cavity 15, and the adjusting cavity 18 is located on a side of the mounting cavity 15 away from the cavity one 12. An end of the stem body 31, on which the blocking block 4 is not arranged, extends into the adjusting cavity 18, and the adjusting cavity 18 is threadedly connected with an adjusting pin 19, and the adjusting pin 19 extends out of the valve body 1.

[0031] With reference to Figure 2 , the valve body 1 is provided with a micro switch 17 arranged at the bottom of the valve body 1 and used for controlling the start and stop of an external power equipment, and the valve body 1 is slidably connected with a touch mechanism 6, and when the blocking block 4 moves away from the cavity one 12, the touch mechanism 6 is driven to move, so that the touch mechanism 6 abuts against the micro switch 17.

[0032] With reference to Figure 2 , the touch mechanism 6 comprises a touch rod 61 slidably connected in the valve body 1 and a spring three 62 arranged in the valve body 1, and the touch rod 61 is located between the micro switch 17 and the blocking block 4. The spring three 62 is sleeved on the touch rod 61, one end of the spring three 62 abuts against the valve body 1, and the other end of the spring three 62 abuts against the touch rod 61, the spring three 62 always drives the touch rod 61 to move towards the cavity one 12, and the elastic force of the spring three 62 is smaller than the elastic force of the spring one 51.

[0033] With reference to Figure 2 , in the case that the valve body 1 is not used, the spring one 51 abuts the sliding seat 32 against a side wall of the mounting cavity 15 close to the cavity one 12, at this time, the blocking block 4 is located at the position farthest away from the cavity one 12, the blocking block 4 abuts against the touch rod 61, so that an end of the touch rod 61 abuts against the micro switch 17, and the spring three 62 is in a force compression state.

[0034] With reference to Figures 3-8 , the outlet channel 13 is provided with a one-way valve 2, which comprises a valve seat 21 arranged in the outlet channel 13, a valve head 22 slidingly connected to the valve seat 21, and a spring 23 arranged in the valve seat 21. The spring 23 is arranged on the side of the valve head 22 away from the chamber 12, and is used to press the valve head 22 against the channel opening of the outlet channel 13 and the chamber 12 to block the channel opening.

[0035] With reference to Figure 3 , the valve body 1 is provided with a return channel 16, which is connected to the outlet channel 13 and the mounting cavity 15. The channel opening of the return channel 16 and the mounting cavity 15 is located on the side of the sliding seat 32 away from the chamber, and the sliding seat 32 will not block the channel opening during sliding.

[0036] With reference to Figures 4-8 , two perforations 24 and a perforation 25 are symmetrically arranged on the valve head 22, and the two perforations 24 and the perforation 25 are connected to the cavities in the valve head 22 and the valve seat 21. Two perforations 26 are symmetrically arranged on the valve seat 21, and the two perforations 26 are located on the sides of the movement paths of the two perforations 24. In order to prevent the valve head 22 from rotating relative to the sliding seat 32 during sliding, a sliding groove 211 is arranged on the inner wall of the valve seat 21, and a sliding block 221 is arranged on the outer wall of the valve head 22, which is slidingly connected in the sliding groove 211 in the axial direction of the valve seat 21.

[0037] With reference to Figures 4-8 , in the initial state, the valve seat 21 blocks the two perforations 24, and the perforation 25 is connected to the return channel 16, so that the return channel 16 is connected to the cavities in the valve head 22 and the valve seat 21. When the valve head 22 is pressed to move in the axial direction of the valve seat 21 (away from the initial blocking position), the perforation 24 is connected to the perforation 26.

[0038] With reference to Figures 4-8 , when the external injection component is closed and backflow enters the valve seat 21 due to water hammer effect, the valve head 22 is pushed to move so that the valve seat 21 blocks the two perforations 24. In this way, the backflow liquid flows directly into the return channel 16 through the perforation 26, which reduces the energy of the backflow liquid during flow, so that the liquid entering the mounting cavity 15 through the return channel 16 has more excellent kinetic energy, which can quickly and efficiently push the movement of the sliding seat 32, and improve the pressure relief speed and efficiency of the valve body 1.

[0039] With reference to Figures 1-8 , the use state of the valve body 1 of the present application is as follows:

[0040] Firstly, the valve body 1 is connected with the external power equipment and the injection component, and then the external power equipment is started to press the liquid into the liquid inlet channel 11 and the chamber one 12. The liquid pressed into the valve body 1 will press the air in the valve body 1 into the pressure relief channel 14 and be discharged through the pressure relief channel 14.

[0041] When the liquid pressure in the valve body 1 gradually increases, the liquid entering the chamber one 12 will push the slide 32 to slide towards the adjusting chamber 18. When the slide 32 moves towards the adjusting chamber 18, the rod 31 and the blocking block 4 will move together, so that the blocking block 4 moves towards the chamber one 12, and finally the blocking block 4 blocks the chamber one 12 and the pressure relief channel 14, so as to ensure the stability of the liquid pressure in the valve body 1. When the blocking block 4 moves close to the chamber one 12, the spring three 62 will rebound to make the contact rod 61 move close to the chamber one 12 and no longer contact the micro switch 17.

[0042] When the high-pressure liquid flows into the chamber one 12, the liquid will press the valve head 22, push the valve head 22 to move into the valve seat 21 and abut against the valve seat 21, so as to make the outlet channel 13 communicate with the chamber one 12, the two perforations one 24 communicate with the two perforations three 26, and the return channel 16 communicate with the outlet channel 13, so that the liquid entering the chamber one 12 will enter the outlet channel 13. The liquid entering the outlet channel 13 will pass through the return channel 16 and prefill the installation chamber 15. At the same time, the liquid entering the outlet channel 13 will flow into the internal cavity of the valve seat 21 through the two perforations three 26 and the two perforations one 24, and then flow into the external injection component.

[0043] After the subsequent external injection component is closed, due to the water hammer effect, the liquid between the valve body 1 and the injection component will surge into the valve seat 21, and the liquid surging into the valve seat 21 will push the valve head 22 to move towards the initial blocking position, so that the valve seat 21 blocks the chamber one 12 and the outlet channel 13. At this time, the valve seat 21 blocks the two perforations one 24, and the perforation two 25 re-communicates with the return channel 16.

[0044] The liquid flowing back into the valve seat 21 will directly surge into the installation chamber 15 through the perforation two 25 and the return channel 16. The liquid surging into the installation chamber 15 will push the slide 32 to slide towards the chamber one 12, so that the blocking block 4 no longer blocks the chamber one 12 and the pressure relief channel 14. The liquid in the chamber one 12 can enter the pressure relief channel 14 and be discharged from the valve body 1, so as to achieve the purpose of pressure relief.

[0045] When the pressure needs to be adjusted, the adjusting plug 19 is twisted to make the adjusting plug 19 abut against the rod 31 and push the rod 31 and the blocking block 4 to move away from the chamber 12, so that the blocking block 4 no longer blocks the pressure relief passage 14 and the chamber 12, and then part of the liquid in the chamber 12 flows into the pressure relief passage 14 through the gap between the blocking block 4 and the pressure relief passage 14. The gap between the blocking block 4 and the pressure relief passage 14 can be controlled by twisting the adjusting plug 19, so that the flow of the liquid flowing from the chamber 12 to the liquid outlet passage 13 is controlled, and then the pressure of the liquid flowing from the chamber 12 to the liquid outlet passage 13 is indirectly adjusted and controlled.

[0046] When the blocking block 4 further moves away from the chamber 12, the blocking block 4 abuts against the touch rod 61 and pushes the touch rod 61 to move away from the chamber 12, and finally the touch rod 61 contacts the micro switch 17, so that the micro switch 17 is triggered, and the external power equipment is turned off by the micro switch 17 to stop transporting the liquid into the valve body 1.

[0047] Of course, the above is only a typical example of the present application, and in addition to this, the present application can have other various specific embodiments, and any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of the present application.

Claims

1. A pressure regulating valve, comprising a valve body (1), wherein the valve body (1) is provided with an inlet channel (11), a chamber (12), and an outlet channel (13), wherein a one-way valve (2) is provided in the outlet channel (13), characterized in that: The valve body (1) is also provided with a pressure relief channel (14) and a mounting cavity (15). The pressure relief channel (14) and the mounting cavity (15) are located on both sides of the first chamber (12) and are connected to the first chamber (12). A valve stem (3) is slidably connected in the mounting cavity (15). The end of the valve stem (3) passes through the first chamber (12) and extends into the pressure relief channel (14). A sealing block (4) is provided on the end of the valve stem (3) that extends into the pressure relief channel (14). The sealing block (4) is used to seal the pressure relief channel (14) and the first chamber (12). 2) Connecting channel openings, the mounting cavity (15) is provided with an elastic element (5), the elastic force of the elastic element (5) acts on the valve stem (3), and always drives the valve stem (3) to move toward the pressure relief channel (14); the valve body (1) is provided with a return channel (16), the return channel (16) connects the liquid outlet channel (13) and the mounting cavity (15), the channel opening connecting the return channel (16) and the mounting cavity (15) is located on the side of the slide (32) away from the chamber, and the slide (32) will not block the channel opening during the sliding process.

2. A pressure regulating valve according to claim 1, characterized in that: The elastic element (5) is a spring (51). The valve stem (3) includes a rod body (31) and a slide (32). The slide (32) has an annular groove (33). The spring (51) is located on the side of the slide (32) away from the chamber (12) and is sleeved on the rod body (31). One end of the spring (51) abuts against the side wall of the mounting cavity (15) away from the chamber (12). The other end of the spring (51) extends into the annular groove (33) and abuts against the slide (32).

3. A pressure regulating valve according to claim 1, characterized in that: The one-way valve (2) includes a valve seat (21), a valve head (22) slidably connected to the valve seat (21), and a spring (23) located inside the valve seat (21). The spring (23) is used to press the valve head (22) against the channel opening connecting the liquid outlet channel (13) and the first chamber (12) so that the valve head (22) blocks the channel opening. The valve head (22) has a through hole (24) and a through hole (25), and the valve seat (21) has a through hole (26). In the initial state, the valve seat (21) blocks the through hole (24), and the through hole (25) connects to the return channel (16). When the valve head (22) moves into the valve seat (21), the through hole (24) connects to the through hole (26), and the return channel (16) connects to the liquid outlet channel (13).

4. A pressure regulating valve according to claim 1, characterized in that: The valve body (1) is equipped with a micro switch (17) for controlling the opening and closing of external power equipment. An actuating mechanism (6) is slidably connected inside the valve body (1). When the blocking block (4) moves away from the chamber (12), it pushes the actuating mechanism (6) to move so that the actuating mechanism (6) abuts against the micro switch (17).

5. A pressure regulating valve according to claim 4, characterized in that: The actuation mechanism (6) includes a contact rod (61) slidably connected in the valve body (1) and a spring three (62) disposed in the valve body (1). The contact rod (61) is located between the micro switch (17) and the sealing block (4). The spring three (62) is sleeved on the contact rod (61). One end of the spring three (62) abuts against the valve body (1), and the other end of the spring three (62) abuts against the contact rod (61). The spring three (62) always drives the contact rod (61) to move toward the first chamber (12). The elastic force of the spring three (62) is less than the elastic force of the first spring (51).

6. A pressure regulating valve according to claim 2, characterized in that: The valve body (1) is provided with an adjustment chamber (18), which is connected to the mounting chamber (15). The adjustment chamber (18) is located on the side of the mounting chamber (15) away from the chamber one (12). The end of the rod (31) extends into the adjustment chamber (18). An adjustment bolt (19) is threaded into the adjustment chamber (18), and the adjustment bolt (19) extends out of the valve body (1).

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