An automatic water replenishment valve

Abstract

The application relates to the field of valves, and an automatic water replenishing valve comprises a valve body, the valve body is provided with a valve cavity, a partition plate is arranged in the valve cavity, a water outlet cavity and a water inlet cavity are arranged on the two sides of the partition plate, the partition plate is provided with a communication hole, a piston rod is slidably arranged in the communication hole, a second gasket is sleeved on the piston rod, a main spring enables the second gasket to have a tendency of moving away from the partition plate, a water inlet pipe and a water outlet pipe are connected to the periphery of the valve body, a water inlet channel is connected between the water inlet cavity and the water inlet pipe, a water outlet channel is connected between the water outlet cavity and the water outlet pipe, a filter screen is arranged in the water inlet pipe, and a check valve assembly is arranged in the water outlet pipe to realize check valve action of the water outlet pipe to the valve cavity. When the water pressure on one side of the water outlet pipe is reduced, the water pressure in the water outlet cavity is reduced, the pressure borne by a diaphragm is reduced, the piston rod slides under the action of the main spring, the second gasket is driven to move away from the partition plate, the communication hole is communicated, liquid replenishment on one side of the water outlet pipe is realized, the filter screen arranged in the water inlet pipe plays a filtering role on liquid entering the water inlet pipe, and the check valve assembly arranged in the water outlet pipe realizes reverse check valve action.

Description

Technical Field

[0001] This application relates to the technical field of valves, and in particular to an automatic water supply valve. Background Technology

[0002] Automatic water supply valves are common automatic pipeline valves, mostly installed on the water supply lines of closed-loop heating or cooling systems. They are used to maintain a stable system pressure. For example, automatic water supply valves are used in wall-hung boilers, small boilers, and central air conditioning water systems to replace traditional water tanks, effectively simplifying the system structure. The automatic water supply valve works as follows: when the system pressure drops, the valve automatically opens to supply water to the system; once the set pressure is reached, the valve automatically closes. Therefore, automatic water supply valves are also reliable safety valves.

[0003] Currently, most automatic water replenishment valves consist of a valve body, valve chamber, inlet, outlet, pressure adjusting bolt, pressure adjusting spring, knob, push rod, and piston. They generally only perform the function of automatic water replenishment. However, in actual use, it is often found that when the inlet of the automatic water replenishment valve is designed with a filtration function or the outlet is designed with a check function, it achieves the multi-functional effect of a combined valve and provides more reasonable and safer protection for the closed circulation system. Automatic water replenishment valves with only a water replenishment function obviously cannot meet market needs. At the same time, these automatic water replenishment valves also have the defect of unreliable piston opening and closing structure design. In actual use, automatic water replenishment often fails due to piston opening and closing problems, posing safety hazards. Utility Model Content

[0004] In order to enable the automatic water supply valve to have both automatic water supply function and inlet filtration function and outlet check function, this application provides an automatic water supply valve.

[0005] The automatic water supply valve provided in this application adopts the following technical solution: An automatic water supply valve includes a valve body, a piston rod, a second washer, a valve disc, a main spring, a filter screen, and a check valve assembly. The valve body has a valve cavity, and a partition is connected to the cavity wall. One side of the partition is an outlet cavity, and the other side is an inlet cavity. The partition has a connecting hole connecting the inlet cavity and the outlet cavity. The piston rod is coaxially slidably embedded in the connecting hole. The second washer is coaxially sleeved on the outer circumference of the piston rod and slidably embedded in the inlet cavity. The second washer is used to seal the connecting hole. The main spring is connected to... Between the piston rod and the valve body, the main spring causes the second washer to tend to move away from the partition. The valve disc is embedded in the outlet chamber. One end of the piston rod is connected to the valve disc. An inlet pipe and an outlet pipe are connected to the outer periphery of the valve body. An inlet channel is provided on the wall of the inlet chamber, and the inlet channel is connected to the inlet pipe. An outlet channel is provided on the wall of the outlet chamber, and the outlet channel is connected to the outlet pipe. The filter screen is embedded in the inlet pipe. The check valve assembly is located in the outlet pipe. The check valve assembly is used to prevent liquid from flowing back from the outlet pipe to the valve chamber.

[0006] By adopting the above technical solution, the water pressure on the outlet pipe side is reduced, which in turn reduces the water pressure in the outlet chamber. The pressure on the diaphragm decreases, and the piston rod slides towards the side closer to the inlet chamber under the action of the main spring. This causes the second washer to move away from the partition, and the connecting hole is connected. This allows the liquid on the inlet pipe side to enter the inlet chamber through the inlet channel, enter the outlet chamber through the connecting hole, and then enter the outlet pipe through the outlet channel, thus replenishing the liquid on the outlet pipe side. A filter screen is installed in the inlet pipe to filter the liquid entering the inlet pipe, and a check valve is installed in the outlet pipe to prevent the liquid on the outlet pipe side from flowing back into the outlet chamber.

[0007] Preferably, the check valve assembly includes a check valve seat, a plug, and a check valve spring. The check valve seat is coaxially connected to the inner wall of the outlet pipe and has a water passage hole. The plug is slidably connected to the check valve seat, and the sliding direction of the plug is parallel to the axis of the outlet pipe. The plug is located on the side of the water passage hole away from the valve cavity. The check valve spring is connected between the check valve seat and the plug, and the check valve spring causes the plug to tend to block the water passage hole.

[0008] By adopting the above technical solution, when the water pressure on the outlet side is high, the liquid impacts the sealing component, causing the sealing component to move away from the water passage, thus enabling the liquid to flow. When the water pressure in the outlet is not greater than the water pressure on the side of the outlet pipe away from the outlet, the sealing component presses against the check seat under the action of the check spring, thereby sealing the water passage and preventing the liquid on the side of the outlet pipe away from the outlet from flowing back into the outlet.

[0009] Preferably, a pressure gauge interface is provided on the inner wall of the outlet pipe. The pressure gauge interface is connected to the outside and is located on the side of the check assembly away from the valve chamber. The pressure gauge interface is used for installing a pressure gauge.

[0010] By adopting the above technical solution, the pressure gauge interface is used to install a pressure gauge so as to measure the water pressure inside the outlet pipe.

[0011] Preferably, it further includes a water inlet pipe, a first washer, and a connecting sleeve. The first washer is coaxially connected to the end of the water inlet pipe away from the valve cavity. One end of the water inlet pipe abuts against the surface of the first washer away from the water inlet pipe. The connecting sleeve is coaxially threaded to the outer periphery of the water inlet pipe. A limit ring is connected to the inner wall of the connecting sleeve away from the valve cavity. A retaining ring is connected to the outer periphery of the water inlet pipe near the water inlet pipe. The side of the retaining ring away from the water inlet pipe abuts against the side of the limit ring near the water inlet pipe.

[0012] By adopting the above technical solution, the water inlet connector and the water inlet pipe are connected by a connecting sleeve, and by replacing the water inlet connector with different models, the automatic water supply valve can be connected to different models of pipes, thereby improving the applicability of the automatic water supply valve.

[0013] Preferably, a first groove is provided on the inner wall of the end of the water inlet pipe away from the water inlet chamber, the filter screen is embedded in the first groove, the surface of the first gasket near the water inlet pipe abuts against the surface of the filter screen away from the bottom of the groove, the filter screen is spherical, and the filter screen protrudes towards the side near the valve chamber.

[0014] By adopting the above technical solution, a first groove is set, which is located at the end of the water inlet pipe away from the water inlet chamber. The filter screen is pressed against the first gasket to realize the filter screen pipeline, which facilitates the replacement and installation of the filter screen.

[0015] Preferably, the device further includes an adjustment assembly, which includes an adjustment seat, an adjustment knob, and an adjustment rod. The adjustment seat is connected to the valve body, and an upper adjustment groove is provided at one end of the adjustment seat near the valve body. The upper adjustment groove is connected to the water outlet chamber. The valve disc is connected between the adjustment seat and the valve seat to isolate the upper adjustment groove from the water outlet chamber. The adjustment rod is threadedly connected to the adjustment seat, and the axis of the adjustment rod is parallel to the piston rod axis. The adjustment knob is connected to the end of the adjustment rod away from the valve body.

[0016] By adopting the above technical solution and setting an adjustment component, the adjustment knob is rotated to drive the adjustment rod to change the preload of the main spring, so as to meet the water replenishment needs under different conditions and improve the applicability of the automatic water replenishment valve.

[0017] Preferably, the adjustment knob is provided with a plurality of anti-slip strips on its outer periphery, and the plurality of anti-slip strips are evenly distributed around the axis of the adjustment knob.

[0018] By adopting the above technical solution, anti-slip strips are set to increase the friction between the adjustment knob and the user's palm, making it easier for the user to rotate the adjustment knob.

[0019] Preferably, the adjustment knob is provided with scale markings, and the outer periphery of the adjustment base is provided with indicator markings corresponding to the scale markings.

[0020] By adopting the above technical solution, users can easily observe the current water pressure, so that they can adjust the pressure required for automatic water replenishment valve to the accurate range, thereby improving the accuracy of automatic water replenishment valve adjustment.

[0021] Preferably, the valve also includes a shut-off assembly, which includes a shut-off seat, a push rod, and a shut-off knob. The shut-off seat is connected to the valve body and has a lower adjustment groove. The axis of the lower adjustment groove coincides with the axis of the piston rod and is connected to the water inlet chamber. The push rod is threadedly connected to the shut-off seat. One end of the push rod extends into the lower adjustment groove, and the end of the push rod near the valve body is used to abut against the end of the piston rod that extends into the water inlet chamber. The shut-off knob is coaxially connected to the other end of the push rod.

[0022] By adopting the above technical solution, when the automatic water supply valve is not in use, rotating the shut-off knob will cause the top rod to abut against the piston rod, thereby fixing the piston rod and reducing the possibility of the valve disc being in a protruding state for a long time under the action of the main spring, which could cause damage to the valve disc and improve the service life of the automatic water supply valve.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. The water pressure on the outlet pipe side decreases, which in turn reduces the water pressure in the outlet chamber. This reduces the pressure on the diaphragm, causing the piston rod to slide towards the inlet chamber under the action of the main spring. This moves the second washer away from the partition, opening the connecting hole. This allows the liquid on the inlet pipe side to enter the inlet chamber through the inlet channel, then through the connecting hole into the outlet chamber, and finally through the outlet channel into the outlet pipe, thus replenishing the liquid on the outlet pipe side. A filter screen is installed inside the inlet pipe to filter the liquid entering the inlet pipe. A check valve is installed on the outlet pipe to prevent liquid from flowing back into the outlet chamber. 2. It allows users to easily observe the current water pressure, enabling them to adjust the pressure required for automatic water replenishment to the accurate range and improve the precision of automatic water replenishment valve adjustment; 3. When the automatic water supply valve is not in use, rotate the shut-off knob to move the push rod against the piston rod, thereby fixing the piston rod and reducing the possibility of the valve disc being in a bulging state for a long time under the action of the main spring, which could cause damage to the valve disc and improve the service life of the automatic water supply valve. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the automatic water supply valve.

[0025] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0026] Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0027] Figure 4 This is a schematic diagram of the exploded structure of the regulating component.

[0028] Figure 5 yes Figure 1 Enlarged view of point C in the middle.

[0029] Explanation of reference numerals in the attached figures: 1. Valve body; 11. Valve chamber; 111. Outlet chamber; 112. Inlet chamber; 12. Partition; 121. Connecting hole; 13. Inlet pipe; 131. First groove; 14. Inlet channel; 15. Outlet pipe; 151. Pressure gauge interface; 16. Outlet channel; 17. Second mounting groove; 18. First mounting groove; 2. Filter screen; 3. Check valve assembly; 31. Check valve seat; 311. Abutment plate; 3111. Water passage hole; 312. Connecting plate; 313. Guide seat; 3131. Guide hole; 32. Sealing component; 321. Guide post; 322. Sealing block; 33. Check valve spring; 4. Water inlet assembly; 41. First washer; 42. Connecting sleeve; 421. Limiting ring; 43. Water inlet pipe; 431. Retaining ring; 432. Second groove; 433. Protrusion; 5. Water supply assembly; 51. Piston rod; 511. Lower abutment ring; 52. Second washer; 53. Abutment seat; 531. Third groove; 54. Secondary spring; 55. Valve disc; 56. Limiting sleeve; 57. Main spring; 6. Adjustment assembly; 61. Adjustment seat; 611. Upper adjustment groove; 612. Upper adjustment hole; 613. Indicator mark; 62. Adjustment rod; 621. Spline; 63. Adjustment knob; 631. First receiving groove; 632. Connecting groove; 633. Anti-slip strip; 634. Scale mark; 64. Adjustment abutment plate; 7. Cut-off assembly; 71. Cut-off seat; 711. Lower adjustment groove; 712. Lower adjustment hole; 72. Top rod; 73. Cut-off knob; 731. Second receiving groove; 8. Plug. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the accompanying drawings.

[0031] Reference Figure 1 This application discloses an automatic water replenishment valve including a valve body 1 and a filter screen 2. The valve body 1 has a valve cavity 11, and a partition 12 is fixedly connected to the wall of the valve cavity 11. The upper part of the partition 12 is a water outlet cavity 111, and the lower part of the partition 12 is a water inlet cavity 112. The partition 12 has a connecting hole 121, the axis of which is vertical, and the connecting hole 121 connects the water outlet cavity 111 and the water inlet cavity 112. A water inlet pipe 13 is fixedly connected to the outer wall of the valve body 1. The axis of the water inlet pipe 13 is horizontal. A water inlet channel 14 is provided on the wall of the water inlet cavity 112, and the water inlet channel 14 is connected to the water inlet pipe 13. A first groove 131 is provided on the inner wall of the end of the water inlet pipe 13 away from the water inlet cavity 112. The filter screen 2 is embedded in the first groove 131, and the surface of the filter screen 2 near the valve body 1 abuts against the bottom of the first groove 131. The outer wall of the filter screen 2 is in contact with the wall of the first groove 131. The filter screen 2 is spherical and protrudes towards the side closer to the water inlet chamber 112.

[0032] An automatic water replenishment valve also includes a water inlet assembly 4. The water inlet assembly 4 includes a first washer 41, a connecting sleeve 42, and a water inlet pipe 43. The first washer 41 is coaxially connected to the end of the water inlet pipe 13 away from the valve body 1, and the surface of the first washer 41 near the water inlet pipe 13 abuts against the surface of the filter screen 2 away from the bottom of the first groove 131. The water inlet pipe 43 is coaxially connected to the side of the first washer 41 away from the water inlet pipe 13, and a retaining ring 431 is fixedly connected to the outer periphery of the end of the water inlet pipe 43 near the water inlet pipe 13. The outer periphery of the retaining ring 431 near the water inlet pipe 13 is provided with a second groove 432, and the first washer 41 is embedded in the second groove 432. The surface of the first washer 41 away from the water inlet pipe 13 abuts against the bottom of the second groove 432, and the inner wall of the first washer 41 is in contact with the wall of the second groove 432. The connecting sleeve 42 is threaded to the outer periphery of the end of the inlet pipe 13 away from the valve body 1. A limiting ring 421 is fixedly connected to the inner wall of the connecting sleeve 42 away from the valve body 1. The surface of the limiting ring 421 near the valve body 1 abuts against the surface of the retaining ring 431 away from the valve body 1. Several protrusions 433 are evenly distributed on the outer wall of the end of the inlet pipe 43 away from the inlet pipe 13.

[0033] Reference Figure 1 and Figure 2An automatic water supply valve also includes a check valve assembly 3. A water outlet pipe 15 is fixedly connected to the outer wall of the valve body 1 on the side away from the inlet pipe 13, and the axis of the water outlet pipe 15 coincides with the axis of the inlet pipe 13. A water outlet channel 16 is provided in the wall of the water outlet chamber 111, and the water outlet channel 16 communicates with the water outlet pipe 15. The check valve assembly 3 includes a check seat 31, a sealing element 32, and a check spring 33. The check seat 31 includes an abutment plate 311, a connecting plate 312, and a guide seat 313. The abutment plate 311 is coaxially embedded in the water outlet pipe 15, and the outer wall of the abutment plate 311 abuts against the inner wall of the water outlet pipe 15. The abutment plate 311 has a water passage hole 3111, which passes through the abutment plate 311 along the axis of the water outlet pipe 15. One end of the connecting plate 312 is fixedly connected to the surface of the abutment plate 311 away from the water outlet cavity 111. The length direction of the connecting plate 312 is parallel to the axis of the water outlet pipe 15. Several connecting plates 312 are provided, and the connecting plates 312 are evenly distributed circumferentially along the axis of the abutment plate 311. In this embodiment, four connecting plates 312 are provided. The other end of the connecting plate 312 is fixedly connected to the guide seat 313. The sealing component 32 includes a guide post 321 and a sealing block 322. The guide seat 313 is provided with a guide hole 3131, and the axis of the guide hole 3131 coincides with the axis of the water outlet pipe 15. The guide post 321 is coaxially slidably embedded in the guide hole 3131, and the sealing block 322 is fixedly connected to the end of the guide post 321 near the abutment plate 311. The sealing block 322 is used to cover the water outlet 3111. The check spring 33 is connected between the guide seat 313 and the sealing block 322, and the check spring 33 makes the sealing block 322 tend to press against the abutment plate 311.

[0034] An automatic water supply valve also includes a plug 8. A pressure gauge interface 151 is provided on the inner wall of the outlet pipe 15. The pressure gauge interface 151 is connected to the outside and is located on the side of the abutment plate 311 away from the outlet chamber 111. The pressure gauge interface 151 is used for installing a pressure gauge. The plug 8 is threaded into the pressure gauge interface 151 to seal it.

[0035] Reference Figure 1 and Figure 3An automatic water replenishment valve further includes a water replenishment component 5 and a shut-off component 7. The water replenishment component 5 includes a piston rod 51, a second washer 52, an abutment seat 53, and a secondary spring 54. The piston rod 51 is coaxially slidably embedded in the connecting hole 121, and a lower abutment ring 511 is fixedly connected to the outer periphery of the piston rod 51, located below the partition plate 12. The abutment seat 53 is coaxially threaded to the lower end of the piston rod 51, and a third groove 531 is provided at the upper end of the abutment seat 53. The second washer 52 is embedded in the third groove 531, with its lower end abutting the bottom of the third groove 531 and its upper end abutting the lower surface of the lower abutment ring 511. The second washer 52 is used to seal the connecting hole 121. The shut-off component 7 includes a shut-off seat 71, a push rod 72, and a shut-off knob 73. A second mounting groove 17 is provided at the lower end of the valve body 1, and the second mounting groove 17 communicates with the water inlet chamber 112. The upper end of the stop seat 71 is threaded into the second mounting groove 17. The upper end of the stop seat 71 has a lower adjusting groove 711, the axis of which coincides with the axis of the connecting hole 121. The lower end of the abutment seat 53 is slidably embedded in the lower adjusting groove 711, and the outer wall of the abutment seat 53 is in contact with the groove wall of the lower adjusting groove 711. A secondary spring 54 is connected between the abutment seat 53 and the stop seat 71. The secondary spring 54 causes the second washer 52 to tend to press against the lower end of the partition plate 12. One end of the secondary spring 54 is connected to the lower end of the abutment seat 53, and the other end is connected to the bottom of the lower adjusting groove 711. The bottom of the lower adjusting groove 711 has a lower adjusting hole 712 coaxially connected to the outside. The upper end of the push rod 72 is threaded into the lower adjusting hole 712, and its upper end extends into the lower adjusting groove 711. The upper end of the push rod 72 is used to abut against the lower end of the abutment seat 53. The shut-off knob 73 is coaxially fixedly connected to the lower end of the top rod 72. The lower end of the shut-off knob 73 is provided with a second receiving groove 731, and the shut-off seat 71 is embedded in the second receiving groove 731.

[0036] An automatic water supply valve also includes an adjustment assembly 6. The adjustment assembly 6 includes an adjustment seat 61, an adjustment rod 62, and an adjustment knob 63. The valve body 1 has a first mounting groove 18 at its upper end, which communicates with the water outlet chamber 111. The lower end of the adjustment seat 61 is threaded into the first mounting groove 18, and the lower end of the adjustment seat 61 has an upper adjustment groove 611, which communicates with the water outlet chamber 111. The bottom of the upper adjustment groove 611 has an upper adjustment hole 612 coaxially arranged, and the adjustment rod 62 is threaded into the upper adjustment hole 612. The axis of the adjustment rod 62 coincides with the axis of the piston rod 51, and the lower end of the adjustment rod 62 extends into the upper adjustment groove 611. The upper outer circumference of the adjustment rod 62 has a spline 621. The adjustment knob 63 is fixedly connected to the upper end of the adjustment rod 62, and the lower end of the adjustment knob 63 has a first receiving groove 631, into which the adjustment seat 61 is embedded. The bottom of the first receiving groove 631 is provided with a connecting groove 632 for the spline 621 to be inserted. The outer periphery of the adjusting knob 63 is provided with several anti-slip strips 633, the length direction of which is vertical, and the anti-slip strips 633 are evenly distributed circumferentially around the axis of the adjusting knob 63. The outer periphery of the adjusting knob 63 near the valve body 1 is provided with a scale mark 634, and the outer periphery of the adjusting seat 61 is provided with an indicator mark 613 corresponding to the scale mark 634.

[0037] Reference Figure 1 and Figure 5 The water replenishment assembly 5 also includes a valve disc 55, a limiting sleeve 56, and a main spring 57. The valve disc 55 is embedded in the first mounting groove 18. The surface of the valve disc 55 near the water outlet chamber 111 abuts against the bottom of the first mounting groove 18, and the surface of the valve disc 55 away from the water outlet chamber 111 abuts against the lower end of the adjusting seat 61. The valve disc 55 isolates the water outlet chamber 111 from the upper adjusting groove 611. The upper end of the piston rod 51 passes through the valve disc 55 and extends into the upper adjusting groove 611. The limiting sleeve 56 is coaxially fixedly connected to the outer periphery of the piston rod 51 near the adjusting rod 62. The end of the limiting sleeve 56 away from the adjusting rod 62 abuts against the surface of the valve disc 55 away from the water outlet chamber 111. The adjusting assembly 6 also includes an adjusting abutment plate 64. The adjusting abutment plate 64 is coaxially fixedly connected to the end of the adjusting rod 62 near the water outlet chamber 111, and the adjusting abutment plate 64 is slidably embedded in the upper adjusting groove 611. The main spring 57 is connected between the adjusting abutment plate 64 and the limiting sleeve 56. The main spring 57 causes the second washer 52 to tend to move away from the partition plate 12. One end of the main spring 57 is connected to the side surface of the adjusting abutment plate 64 near the inlet / outlet water chamber 111, and the other end of the main spring 57 is connected to the end of the limiting sleeve 56 away from the valve disc 55.

[0038] The implementation principle of an automatic water replenishment valve in this application embodiment is as follows: When the water pressure on one side of the outlet pipe 15 decreases, the limiting sleeve 56 moves downward under the elastic force of the main spring 57, causing the valve disc 55 to protrude towards the outlet chamber 111, causing the piston rod 51 to move downward, causing the abutment seat 53 to move downward against the elastic force of the secondary spring 54, so that the second disengagement plate 12 is disengaged, allowing the liquid to pass through the inlet pipe 43, be filtered by the filter screen 2, enter the inlet pipe 13, enter the inlet chamber 112 through the inlet channel 14, and then enter the outlet chamber 111 through the connecting hole 121. Then, the liquid enters the outlet pipe 15 through the outlet channel 16. The liquid impacts the sealing component 32, pushing the sealing component 32 to slide away from the outlet chamber 111, overcoming the elastic force of the check spring 33. This makes the water passage 3111 connected, and the liquid flows out through the water passage 3111. When the water pressure on one side of the outlet pipe 15 rises, it causes the diaphragm to contract, which causes the limiting sleeve 56 to move upward against the elastic force of the main spring 57. This causes the piston rod 51 to move upward, which in turn causes the abutment seat 53 to move upward, so that the second washer 52 abuts against the lower end of the partition plate 12, thus closing the connecting hole 121.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic water supply valve, characterized in that: The valve body (1) includes a valve body (1), a piston rod (51), a second washer (52), a valve disc (55), a main spring (57), a filter screen (2), and a check valve assembly (3). The valve body (1) has a valve chamber (11). A partition (12) is connected to the wall of the valve chamber (11). One side of the partition (12) is an outlet chamber (111). The other side of the partition (12) is an inlet chamber (112). The partition (12) has a connecting hole (121). The connecting hole (121) connects the inlet chamber (112) and the outlet chamber (111). The piston rod (51) is coaxially slidably embedded in the connecting hole (121). The second washer (52) is coaxially sleeved on the outer circumference of the piston rod (51). The second washer (52) is slidably embedded in the inlet chamber (112). The second washer (52) is used to block the connecting hole (121). The main spring (57) is... The main spring (57) connects the piston rod (51) and the valve body (1); the main spring (57) causes the second washer (52) to tend to move away from the partition (12); the valve disc (55) is embedded in the water outlet chamber (111); one end of the piston rod (51) is connected to the valve disc (55); the valve body (1) is connected to the outer periphery of the water inlet pipe (13) and the water outlet pipe (15); the water inlet chamber (112) is provided with a water inlet channel (1) at the cavity wall. 4); the water inlet channel (14) is connected to the water inlet pipe (13); the water outlet chamber (111) is provided with a water outlet channel (16) on its wall; the water outlet channel (16) is connected to the water outlet pipe (15); the filter screen (2) is embedded in the water inlet pipe (13); the check valve assembly (3) is located in the water outlet pipe (15); the check valve assembly (3) is used to prevent the liquid from flowing back from the water outlet pipe (15) to the valve chamber (11).

2. The automatic water supply valve according to claim 1, characterized in that: The check valve assembly (3) includes a check valve seat (31), a plug (32), and a check valve spring (33); the check valve seat (31) is coaxially connected to the inner wall of the outlet pipe (15); the check valve seat (31) is provided with a water passage hole (3111); the plug (32) is slidably connected to the check valve seat (31); the sliding direction of the plug (32) is parallel to the axis of the outlet pipe (15); the plug (32) is located on the side of the water passage hole (3111) away from the valve chamber (11); the check valve spring (33) is connected between the check valve seat (31) and the plug (32); the check valve spring (33) makes the plug (32) tend to block the water passage hole (3111).

3. The automatic water supply valve according to claim 2, characterized in that: The water outlet pipe (15) is provided with a pressure gauge interface (151) on its inner wall; the pressure gauge interface (151) is connected to the outside; the pressure gauge interface (151) is located on the side of the check assembly (3) away from the valve chamber (11); the pressure gauge interface (151) is used for installing a pressure gauge.

4. The automatic water supply valve according to claim 1, characterized in that: It also includes an inlet pipe (43), a first washer (41), and a connecting sleeve (42); the first washer (41) is coaxially connected to the end of the inlet pipe (13) away from the valve chamber (11); one end of the inlet pipe (43) abuts against the surface of the first washer (41) away from the inlet pipe (13); the connecting sleeve (42) is coaxially threaded to the outer periphery of the inlet pipe (13); a limit ring (421) is connected to the inner wall of the end of the connecting sleeve (42) away from the valve chamber (11); a retaining ring (431) is connected to the outer periphery of the inlet pipe (43) near the inlet pipe (13); the side of the retaining ring (431) away from the inlet pipe (13) abuts against the side of the limit ring (421) near the inlet pipe (13).

5. The automatic water supply valve according to claim 4, characterized in that: The water inlet pipe (13) has a first groove (131) on the inner wall of the end away from the water inlet cavity (112); the filter screen (2) is embedded in the first groove (131); the surface of the first gasket (41) near the water inlet pipe (13) abuts against the surface of the filter screen (2) away from the bottom of the groove; the filter screen (2) is spherical; the filter screen (2) protrudes towards the side near the valve cavity (11).

6. The automatic water supply valve according to claim 1, characterized in that: It also includes an adjustment assembly (6); the adjustment assembly (6) includes an adjustment seat (61), an adjustment knob (63) and an adjustment rod (62); the adjustment seat (61) is connected to the valve body (1); the end of the adjustment seat (61) near the valve body (1) is provided with an upper adjustment groove (611); the upper adjustment groove (611) is connected to the water outlet chamber (111); the valve disc (55) is connected between the adjustment seat (61) and the valve seat to isolate the upper adjustment groove (611) from the water outlet chamber (111); the adjustment rod (62) is threadedly connected to the adjustment seat (61); the axis of the adjustment rod (62) is parallel to the axis of the piston rod (51); the adjustment knob (63) is connected to the end of the adjustment rod (62) away from the valve body (1).

7. The automatic water supply valve according to claim 6, characterized in that: The adjustment knob (63) is provided with a plurality of anti-slip strips (633) on its outer periphery; the plurality of anti-slip strips (633) are evenly distributed around the axis of the adjustment knob (63).

8. The automatic water supply valve according to claim 6, characterized in that: The adjustment knob (63) is provided with a scale mark (634); the outer periphery of the adjustment seat (61) is provided with an indicator mark (613) corresponding to the scale mark (634).

9. The automatic water supply valve according to claim 1, characterized in that: It also includes a shut-off assembly (7); the shut-off assembly (7) includes a shut-off seat (71), a push rod (72) and a shut-off knob (73); the shut-off seat (71) is connected to the valve body (1); the shut-off seat (71) is provided with a lower adjustment groove (711); the axis of the lower adjustment groove (711) coincides with the axis of the piston rod (51); the lower adjustment groove (711) is connected to the water inlet chamber (112); the push rod (72) is threadedly connected to the shut-off seat (71); one end of the push rod (72) extends into the lower adjustment groove (711); the end of the push rod (72) near the valve body (1) is used to abut against the end of the piston rod (51) that extends into the water inlet chamber (112); the shut-off knob (73) is coaxially connected to the other end of the push rod (72).

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