Water replenishing valve of water tank

Abstract

The utility model relates to a water tank water replenishing valve which is composed of an outer shell, and two ends of the outer shell are fixedly connected with a water inlet pipe and a water outlet pipe respectively. A limiting ring is coaxially arranged in the water inlet pipe, and a water blocking block is arranged on the inner side of the limiting ring. A positioning ring is arranged on the side, close to the outer shell, of the water blocking block, and a compression spring is arranged between the positioning ring and the water blocking block. The two ends of the compression spring make contact with the water blocking block and the positioning ring correspondingly. When the internal pressure of the water outlet pipe is reduced, through the synergistic effect of the positioning ring and the compression spring, the pressure applied by the water inlet pipe to the water stopping block promotes the water stopping block to move towards the outer shell, so that liquid in the water inlet pipe flows towards the water outlet pipe, and the pressure of the water outlet pipe is automatically adjusted. In addition, a sliding connection mechanism of the positioning ring and the water inlet pipe allows the relative position between the positioning ring and the water blocking block to be adjusted, then the initial compression state of the compression spring is changed, and the initial pressure borne by the side, close to the water outlet pipe, of the water blocking block is adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a water tank water replenishing valve. Background Art

[0002] During the production process, to ensure that process requirements are met, the water tank must continuously maintain a sufficient amount of water to support the corresponding reaction or process steps. To achieve a stable liquid level in the water tank, the existing technology generally configures a dedicated water replenishment valve at the water tank inlet.

[0003] At present, the water supply valve is mainly composed of a valve body, with the two ends of the valve body connected to the water inlet pipe and the water outlet pipe respectively. The inside of the valve body uses a special pressure controller to regulate the flow and cutoff of the water.

[0004] The valve body used in the prior art devices is mostly an electromagnetic control valve, which uses a built-in pressure sensor to monitor the pressure value in the water inlet pipe. Once the pressure value reaches a preset standard, the electromagnetic change controls the opening and closing of the valve body.

[0005] However, in actual applications, we discovered that while electromagnetic control valves offer excellent sensitivity and detection accuracy, they are also significantly constrained by environmental factors. Furthermore, their high-precision control capabilities also make them more susceptible to the effects of impurities in the water. Given this, we determined the need to develop a tank fill valve that reduces its dependence on the external environment. Utility Model Content

[0006] In response to the defects in the existing technology, the utility model proposes a water tank water replenishing valve, which has the advantage of reducing dependence on the external environment, effectively solving the problem of high dependence on the external environment in the existing technology devices.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A water tank water filling valve comprises an outer shell, wherein the left and right ends of the outer shell are respectively fixedly connected to a water inlet pipe and a water outlet pipe, and a limit ring is coaxially fixedly connected to the water inlet pipe, a water blocking block is inserted into the inner side of the limit ring, and a positioning ring is provided on the side of the water blocking block close to the outer shell, the positioning ring is slidably connected to the outer shell, a compression spring is provided between the positioning ring and the water blocking block, and the two axial ends of the compression spring are respectively in contact with the water blocking block and the positioning ring, a fitting I is sleeved on the outer side of the water inlet pipe, the fitting I is screwed to the water inlet pipe, and a filter is inserted into the inner side of the fitting I, a fitting II is inserted into the inner side of the water outlet pipe, the fitting II is screwed to the water outlet pipe, and the part of the fitting II located outside the water outlet pipe is coaxially fixedly connected to an auxiliary ring, and an anti-slip groove is provided on the outer side of the auxiliary ring.

[0009] Preferably, the positioning ring is coaxially fixedly connected to a screw on one side close to the outer shell, and the projection of the vertical plane of the positioning ring is not circular, the outer wall of the positioning ring abuts against the inner wall of the water inlet pipe, and a driven bevel gear is sleeved on the outer side of the screw. The driven bevel gear is located in the outer shell and is rotatably connected to the outer shell, and the driven bevel gear is threadedly connected to the screw.

[0010] Preferably, a driving bevel gear is provided on one side of the driven bevel gear, and the driving bevel gear is located inside the outer shell and is rotatably connected to the outer shell, and the central axis of the driving bevel gear is perpendicular to the central axis of the driven bevel gear, and the driving bevel gear is meshed and transmitted with the driven bevel gear, and one side of the outer shell is fixedly connected with an upper and lower axial mounting tube, and a driven rod is inserted into the mounting tube, and the outer shell is provided with a through hole for the driven rod, and one axial end of the driven rod protrudes from the through hole and is key-connected to the driving bevel gear, and the other axial end of the driven rod protrudes from the mounting tube and is fixedly connected to the driving member.

[0011] Preferably, a positioning hole is formed at one end of the lead screw close to the water blocking block, a positioning rod is inserted into the positioning hole, and the positioning rod is fixedly connected to the water blocking block.

[0012] Preferably, the projection of the water blocking block on the vertical plane is a trapezoidal structure, the outer diameter of the water blocking block close to the outer shell is larger than the outer diameter of the water blocking block away from the outer shell, and a compensation ring I made of rubber is provided on the outside of the water blocking block. When the water blocking block is located inside the limiting ring, the compensation ring I is interference fit with the limiting ring.

[0013] Preferably, the matching part I includes a fixing ring with a polygonal structure on the vertical plane, the fixing ring is sleeved on the outside of the water inlet pipe and screwed to the water inlet pipe, and a mounting hole is opened on the side of the fixing ring away from the outer shell, the diameter of the mounting hole is smaller than the inner diameter of the fixing ring, the projection of the filter screen on the vertical plane is a T-shaped structure, and the smaller diameter part of the filter screen is embedded in the water inlet pipe, the outer diameter of the larger diameter part of the filter screen is smaller than the diameter of the mounting hole, and a compensation ring II made of rubber is sleeved on the outside of the smaller diameter part of the filter screen, the compensation ring II is located outside the water inlet pipe, and the outer diameter of the compensation ring II is greater than the inner diameter of the water inlet pipe.

[0014] Preferably, the fitting I includes a connecting pipe having a T-shaped structure projected on the vertical plane, the larger diameter portion of the connecting pipe is located inside the fixing ring, and the outer diameter length of the larger diameter portion of the connecting pipe is greater than the diameter length of the mounting hole, the smaller diameter portion of the connecting pipe passes through the mounting hole, the smaller diameter portion of the connecting pipe is located on the side of the fixing ring away from the outer shell, and an external thread is provided on the outer side of the smaller diameter portion of the connecting pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This design, through the synergistic effect of the positioning ring and the compression spring, automatically moves the water block toward the outer shell when the pressure inside the outlet pipe decreases, leveraging the pressure exerted on it by the water inlet pipe. This allows the liquid inside the inlet pipe to flow into the outlet pipe, automatically regulating the outlet pipe pressure. Furthermore, the sliding connection between the positioning ring and the inlet pipe allows the relative position of the two blocks to be adjusted, thereby altering the initial compression state of the compression spring and adjusting the initial pressure on the side of the block closest to the outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 This is a schematic diagram of the internal structure of the outer shell of the utility model.

[0019] Figure 3 This is a schematic diagram of the cooperation relationship between the water blocking block and the limiting ring of the utility model.

[0020] Figure 4 This is a schematic diagram of the matching relationship between the driving bevel gear and the driven bevel gear of the utility model.

[0021] Figure 5 This is a schematic diagram of the overall structure of the matching component I of the present utility model.

[0022] In the figure: 1. Auxiliary ring; 2. Water outlet pipe; 3. Outer shell; 4. Water inlet pipe; 5. Matching part I; 501. Filter screen; 502. Fixing ring; 503. Connecting pipe; 504. Compensating ring II; 6. Mounting pipe; 7. Driving part; 8. Matching part II; 9. Driving bevel gear; 10. Screw; 11. Positioning ring; 12. Compression spring; 13. Positioning rod; 14. Water blocking block; 15. Limiting ring; 16. Compensating ring I; 17. Positioning hole; 18. Driven rod; 19. Driven bevel gear. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] Please refer to Figure 1 , a water tank water filling valve, its structure is consistent with the existing technical device, the main part is composed of an outer shell 3. The left and right sides of the outer shell 3 are respectively fixedly connected with an inlet pipe 4 and an outlet pipe 2 to ensure smooth inflow and outflow of water.

[0026] At the same time, a matching piece is also provided at the distal end of the water inlet pipe 4 and the water outlet pipe 2. The water inlet pipe 4 and the water outlet pipe 2 are connected to other structural components of the system by means of these matching pieces, thereby achieving the function of the device to transfer and receive water.

[0027] Please refer to Figure 2 Compared to existing devices, this device features a fitting II8 inserted inside the outlet pipe 2, which is securely connected to the pipe via a threaded connection. Furthermore, the portion of the fitting II8 located outside the pipe 2 is coaxially fixedly connected to an auxiliary ring 1, which has anti-slip grooves on its exterior. This design facilitates user operation and enhances ease of use.

[0028] In addition, in actual applications, the material of the auxiliary ring 1 can be adjusted, especially limited to PVC material, to further optimize the user experience.

[0029] Correspondingly, a fitting part I5 is sleeved on the outside of the water inlet pipe 4 of the device, and the fitting part I5 is also firmly connected to the water inlet pipe 4 through a threaded connection, ensuring the firmness and reliability of the connection.

[0030] A filter 501 is inserted into the inner side of the fitting I5. This filter 501 can effectively filter out impurities in the water, ensuring water cleanliness. Furthermore, the filter 501 is positioned at the front end of the water inlet pipe 4. This helps enhance the device's ability to filter impurities, preventing them from accumulating inside the device's outer shell 3 and adversely affecting other components of the device.

[0031] Specifically, if Figure 5As shown, the fitting I5 comprises a fixing ring 502, which has a polygonal vertical structure and is positioned over the outside of the water inlet pipe 4 and secured via a threaded connection. The polygonal structure is designed to facilitate user rotation of the fixing ring 502, thereby facilitating the threaded connection between the fixing ring 502 and the water inlet pipe 4.

[0032] The fixing ring 502 is provided with a mounting hole on a side not facing the outer shell 3 , the diameter of the mounting hole being smaller than the inner diameter of the fixing ring 502 .

[0033] Therefore, the filter 501 in this device forms a T-shaped structure when projected vertically. The smaller diameter portion of the filter 501 is embedded within the water inlet pipe 4, while the larger diameter portion has an outer diameter smaller than the diameter of the mounting hole. This ensures that the filter 501 is securely attached to the inside of the water inlet pipe 4 via the larger diameter portion. This design not only ensures effective filtration but also secures the filter 501, facilitating its removal and replacement.

[0034] Furthermore, to achieve an effective seal between the filter 501 and the water inlet pipe 4, this device features a rubber compensation ring II 504 outside the smaller diameter portion of the filter 501. Notably, the outer diameter of the compensation ring II 504 is designed to be larger than the inner diameter of the water inlet pipe 4. This design ensures that when the compensation ring II 504 is restrained outside the water inlet pipe 4, it can tightly abut the end of the pipe 4. Thanks to the inherent elastic deformation of the compensation ring II 504, this device successfully achieves a sealed connection between the filter 501 and the water inlet pipe 4.

[0035] To ensure the connection of fitting I5 and facilitate the adjacent connection between the water inlet pipe 4 and other components, the device includes a specially designed connecting pipe 503 with a T-shaped vertical projection. The larger diameter portion of this connecting pipe 503 is located inside the fixing ring 502, while the smaller diameter portion extends through the mounting hole, that is, the smaller diameter portion is located on the side of the fixing ring 502 away from the outer shell 3. This structure, with external threads on the outer side of the smaller diameter portion of the connecting pipe 503, facilitates connection and removal with other components.

[0036] Furthermore, in actual use, by ensuring that the outer diameter of the larger diameter portion of the connecting tube 503 is greater than the diameter of the mounting hole, and by combining the restraining effect of the water inlet pipe 4 on the position of the filter screen 501, the relative fixation between the fixing ring 502 and the connecting tube 503 is successfully achieved. Specifically, one end of the compensation ring II 504 is in close contact with the end of the water inlet pipe 4, while its other end abuts the larger diameter portion of the filter screen 501. The other end of the larger diameter portion of the filter screen 501 is in contact with the connecting tube 503. Correspondingly, the other end of the larger diameter portion of the connecting tube 503 is in close contact with the inner wall of the fixing ring 502 at the end away from the water inlet pipe 4.

[0037] Please refer to Figure 2 、 Figure 3 Compared to existing devices, this device aims to achieve automated control of the pressure value of the water outlet pipe 2. Specifically, a limit ring 15 is coaxially fixedly connected to the interior of the water inlet pipe 4, and a water block 14 is inserted inside the limit ring 15. At this time, the water block 14 can seal the limit ring 15, that is, the liquid in the water inlet pipe 4 cannot move to the left.

[0038] To automatically adjust the pressure inside the water outlet pipe 2, the device is equipped with a positioning ring 11 on the side of the water blocking block 14 close to the outer shell 3, and a compression spring 12 is arranged between the positioning ring 11 and the water blocking block 14. The two axial ends of the compression spring 12 abut against the water blocking block 14 and the positioning ring 11, respectively. This allows the pressure inside the water outlet pipe 2 to be adjusted by changing the pressure at the two axial ends of the water blocking block 14.

[0039] It should be noted that in actual operation, the right end of the water block 14 is pushed by the water pressure inside the water inlet pipe 4, while its left end is pushed by both the elastic force of the compression spring 12 and the water pressure inside the water inlet pipe 4. Therefore, when the pressure at the left end of the water block 14 decreases, the water pressure inside the water inlet pipe 4 will push the water block 14 to the left. At this time, the difference between the diameter of the water block 14 and the diameter of the inner wall of the water inlet pipe 4 is utilized to allow liquid inside the water inlet pipe 4 to flow into the water outlet pipe 2.

[0040] At the same time, during actual operation, as the liquid in the water inlet pipe 4 flows into the water outlet pipe 2, the water pressure inside the water outlet pipe 2 will continue to rise. Therefore, when the pressure on the left and right ends of the water block 14 reaches equilibrium, the water block 14 will re-enter the retaining ring 15, effectively blocking the flow of water. This mechanism ensures that the device can achieve the automatic water replenishment function.

[0041] It should be emphasized that since the left end of the water blocking block 14 is simultaneously subjected to the elastic force of the compression spring 12 and the thrust of the water pressure inside the water inlet pipe 4, the water pressure inside the water inlet pipe 4 can be controlled by adjusting the elastic force applied by the compression spring 12 on the water blocking block 14.

[0042] In practice, the elastic force of the compression spring 12 is determined by its own elastic coefficient and compression length. Therefore, the device constrains the positioning ring 11 to compress the spring 12 and slides it into the water inlet pipe 4. This can change the relative distance between the positioning ring 11 and the water blocking block 14 by moving the positioning ring 11, thereby achieving control of the initial compression amount of the compression spring 12.

[0043] Specifically, in order to achieve precise control of the position of the positioning ring 11 , the device installs the lead screw 10 on the side of the positioning ring 11 adjacent to the outer shell 3 in a coaxial fixed connection manner.

[0044] At the same time, the design of this device ensures that the projection of the positioning ring 11 on a vertical plane presents a non-circular feature. Furthermore, the outer wall of the positioning ring 11 is in close contact with the inner wall of the water inlet pipe 4, effectively constraining the position of the positioning ring 11 through the water inlet pipe 4. Furthermore, combined with a driven bevel gear 19 that fits over and is threadedly connected to the lead screw 10, once the position of the driven bevel gear 19 is determined, the position of the positioning ring 11 can be adjusted by rotating the driven bevel gear 19.

[0045] It is important to note that, in practical applications, the specific position of positioning ring 11 can be determined in a variety of ways. For example, an indicator ring can be installed on the outside of water inlet pipe 4, with this indicator ring and positioning ring 11 being magnetically connected to each other for mutual positioning. Alternatively, the material of water inlet pipe 4 can be specifically restricted, such as using a transparent material to directly observe and determine the position of positioning ring 11. However, in this patent application, the method for determining the position of positioning ring 11 does not constitute a core technical issue to be solved, and therefore, it will not be elaborated in detail here.

[0046] Specifically, to precisely control the number of rotations of the driven bevel gear 19, the present device incorporates a driving bevel gear 9 on one side of the driven bevel gear 19. The central axis of the driving bevel gear 9 is perpendicular to that of the driven bevel gear 19 and is connected to the driven bevel gear 19 via a meshing transmission. With this configuration, the rotation of the driving bevel gear 9 effectively drives the rotation of the driven bevel gear 19.

[0047] Therefore, this device has a mounting tube 6, extending in an upward and downward axial direction, fixedly connected to one side of the outer shell 3. This mounting tube 6 has a slot inside for receiving a driven rod 18. Furthermore, a through-hole is provided in the outer shell 3 for the location of the driven rod 18, allowing one end of the driven rod 18 to pass through the through-hole and be secured to the driving bevel gear 9 via a keyed connection. The other end of the driven rod 18 extends out of the mounting tube 6 and is fixedly connected to a driving member 7. This design ensures the stable position of the driven rod 18 while also allowing the device to rotate the bevel gear 9 by rotating the driving member 7.

[0048] In addition, as shown in the figure, an elastic ring made of a corresponding material is sleeved on the outside of the driven rod 18. The presence of this elastic ring can effectively prevent the liquid inside the outer shell 3 from flowing out through the through hole, and can also cooperate with the mounting tube 6 to fix the position of the driven rod 18.

[0049] It should be clearly pointed out that in actual applications, the coordinated arrangement of the driving bevel gear 9 and the driven bevel gear 19 not only effectively prevents travel interference between the drive ring and the water inlet pipe 4 and the water outlet pipe 2, but also allows the vertical axial drive assembly in this arrangement to better align with the human body's natural force application habits. Furthermore, the coordinated arrangement of the lead screw 10 and the driven bevel gear 19 allows for relatively precise positioning of the positioning ring 11, preventing it from moving in the direction opposite to the water-blocking ring in the absence of any external force.

[0050] Furthermore, the device provides a positioning hole 17 at one end of the screw 10 adjacent to the water blocking block 14, in which the positioning rod 13 is inserted, and the positioning rod 13 is fixedly connected to the water blocking block 14, thereby ensuring the precise positioning of the water blocking block 14.

[0051] Furthermore, this device constrains the vertical projection of water block 14, giving it a trapezoidal structure. Specifically, the outer diameter of water block 14 on the side closest to outer shell 3 is larger than that on the side further away from outer shell 3. This design prevents water block 14 from moving to the end of retaining ring 15 away from outer shell 3. Furthermore, as the length of water block 14 embedded within retaining ring 15 increases, the distance between water block 14 and the inner wall of retaining ring 15 gradually decreases, thereby more effectively isolating the water body.

[0052] At the same time, a rubber compensation ring I 16 is sleeved on the outside of the water blocking block 14. When the water blocking block 14 is located inside the limiting ring 15, an interference fit is formed between the compensation ring I 16 and the limiting ring 15, further improving the sealing performance of the device.

[0053] In actual application, the operation process of the utility model is as follows:

[0054] First, the device is firmly connected to the external structure through the external thread on the outside of the connecting tube 503 and the auxiliary ring 1;

[0055] Subsequently, the driving member 7 rotates, driving the bevel gear 9 to drive the driven bevel gear 19 to rotate, thereby causing the lead screw to synchronously drive the positioning ring 11 to move left and right linearly. During this process, ensure that the extension of the compression spring 12 in the initial state meets the expected setting;

[0056] Next, open the hydraulic valve of the external structure to allow the liquid to flow into the device through the water inlet pipe 4. At this time, the water pressure on the right end of the water blocking block 14 gradually increases.

[0057] Afterwards, as the water pressure at the right end of the water blocking block 14 continues to increase, the water pressure at the left end gradually decreases. When the water pressure at the right end exceeds that at the left end, the water blocking block 14 will move to the left, allowing the liquid to enter the water outlet pipe 2.

[0058] Finally, as liquid continues to flow into outlet pipe 2, the water pressure on the left side of water block 14 continues to rise, while the water pressure area on the right side remains stable. When the water pressure on the left and right sides of water block 14 reaches equilibrium, water block 14 reenters the interior of retaining ring 15. In this process, the device successfully completes a single water replenishment process at the outlet pipe 2.

[0059] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water tank water supply valve, characterized by: It comprises an outer shell (3), wherein the left and right ends of the outer shell (3) are respectively fixedly connected to a water inlet pipe (4) and a water outlet pipe (2), and a limiting ring (15) is coaxially fixedly connected inside the water inlet pipe (4); A water blocking block (14) is inserted into the inner side of the limiting ring (15), and a positioning ring (11) is provided on the side of the water blocking block (14) close to the outer shell (3), and the positioning ring (11) is slidably connected to the outer shell (3); A compression spring (12) is provided between the positioning ring (11) and the water blocking block (14), and two axial ends of the compression spring (12) are in contact with the water blocking block (14) and the positioning ring (11) respectively; The outer side of the water inlet pipe (4) is provided with a fitting part I (5), the fitting part I (5) is screwed to the water inlet pipe (4), and a filter screen (501) is inserted into the inner side of the fitting part I (5); A matching piece II (8) is inserted into the inner side of the water outlet pipe (2), and the matching piece II (8) is screwed to the water outlet pipe (2). In addition, the portion of the matching piece II (8) located outside the water outlet pipe (2) is coaxially fixedly connected to an auxiliary ring (1), and an anti-slip groove is provided on the outer side of the auxiliary ring (1).

2. A water tank water supply valve according to claim 1, characterized in that: The positioning ring (11) is coaxially fixedly connected to a lead screw (10) on one side close to the outer shell (3), and the projection of the positioning ring (11) on the vertical plane is not circular, and the outer wall of the positioning ring (11) abuts against the inner wall of the water inlet pipe (4); A driven bevel gear (19) is sleeved on the outer side of the lead screw (10). The driven bevel gear (19) is located inside the outer shell (3) and is rotatably connected to the outer shell (3). In addition, the driven bevel gear (19) is threadedly connected to the lead screw (10).

3. A water tank water supply valve according to claim 2, characterized in that: A driving bevel gear (9) is provided on one side of the driven bevel gear (19), the driving bevel gear (9) is located inside the outer shell (3) and is rotatably connected to the outer shell (3), and the central axis of the driving bevel gear (9) is perpendicular to the central axis of the driven bevel gear (19), and the driving bevel gear (9) and the driven bevel gear (19) are meshed and transmission-connected; One side of the outer shell (3) is fixedly connected to an upper and lower axial mounting tube (6), a driven rod (18) is inserted into the mounting tube (6), and the outer shell (3) is provided with a through hole for the driven rod (18), one axial end of the driven rod (18) protrudes from the through hole and is key-connected to the driving bevel gear (9), and the other axial end of the driven rod (18) protrudes from the mounting tube (6) and is fixedly connected to the driving member (7).

4. The water tank filling valve according to claim 2, characterized in that: A positioning hole (17) is provided at one end of the lead screw (10) close to the water blocking block (14), a positioning rod (13) is inserted into the positioning hole (17), and the positioning rod (13) is fixedly connected to the water blocking block (14).

5. The water tank filling valve according to claim 1, characterized in that: The projection of the water blocking block (14) on the vertical plane is a trapezoidal structure. The outer diameter of the water blocking block (14) on the side close to the outer shell (3) is larger than the outer diameter of the water blocking block (14) on the side away from the outer shell (3). In addition, a compensation ring I (16) made of rubber material is sleeved on the outer side of the water blocking block (14). When the water blocking block (14) is located inside the limiting ring (15), the compensation ring I (16) and the limiting ring (15) are interference-fitted.

6. The water tank filling valve according to claim 1, characterized in that: The matching member I (5) comprises a fixing ring (502) having a polygonal vertical surface. The fixing ring (502) is sleeved on the outside of the water inlet pipe (4) and is screwed to the water inlet pipe (4). Furthermore, a mounting hole is provided on a side of the fixing ring (502) away from the outer shell (3). The diameter of the mounting hole is smaller than the inner diameter of the fixing ring (502). The projection of the filter screen (501) on the vertical plane is a T-shaped structure, and the smaller diameter portion of the filter screen (501) is embedded in the water inlet pipe (4), and the outer diameter length of the larger diameter portion of the filter screen (501) is smaller than the diameter length of the mounting hole; A compensation ring II (504) made of rubber is sleeved on the outer side of the smaller diameter portion of the filter screen (501). The compensation ring II (504) is located outside the water inlet pipe (4), and the outer diameter of the compensation ring II (504) is greater than the inner diameter of the water inlet pipe (4).

7. The water tank filling valve according to claim 6, characterized in that: The matching part I (5) includes a connecting pipe (503) having a T-shaped structure when projected on a vertical plane. The larger diameter portion of the connecting pipe (503) is located inside the fixing ring (502), and the outer diameter length of the larger diameter portion of the connecting pipe (503) is greater than the diameter length of the mounting hole. The smaller diameter portion of the connecting pipe (503) passes through the mounting hole, and the smaller diameter portion of the connecting pipe (503) is located on the side of the fixing ring (502) away from the outer shell (3). In addition, an external thread is provided on the outer side of the smaller diameter portion of the connecting pipe (503).

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