Water leakage prevention conversion valve

Abstract

The utility model relates to the field of conversion valves and discloses a water leakage prevention conversion valve which comprises a metal valve shell, a valve element is rotationally arranged in the metal valve shell, a hydraulic motor is fixedly installed on the top of the metal valve shell, a liquid inlet pipe is welded to the top of one end of the outer wall of the metal valve shell, and the other end of the liquid inlet pipe is in threaded connection with a liquid inlet sleeve. Two liquid outlet pipes are welded to the two sides of the middle of the outer wall of the metal valve shell, the other ends of the liquid outlet pipes are in threaded connection with liquid outlet sleeves, a pressure reducing pipe is arranged at the other end outside the metal valve shell, and a rotating shaft pipe is welded to the top of the metal valve shell. According to the water-leakage-proof conversion valve, connection points can be fastened without water leakage, and hydraulic pressure in the conversion valve can be balanced in a self-adaptive mode.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of steering valves, specifically a leak-proof steering valve. Background Technology

[0002] A directional control valve, also known as a diverting valve, is an important component of a fluid control system. It is primarily used to change the flow direction of fluids to meet the needs of various processes. It typically consists of a valve body, valve core, spring, and seals, with the valve core being the key component controlling the fluid flow direction. By rotating or moving the valve core, the connection relationship of the fluid passage can be changed, thereby altering the fluid flow direction. However, due to frequent pressure changes and numerous rotations within the directional control valve, problems such as decreased sealing and leakage can easily occur.

[0003] According to application number 201921695068.0, a pressure reducing valve for preventing water leakage is provided, including a pressure reducing valve, an adjusting device is provided on the upper surface of the pressure reducing valve, and the adjusting device includes an adjusting block. The adjusting block is fixedly provided on the upper surface of the pressure reducing valve by bolts. An inlet and an outlet are respectively opened on the two sides of the pressure reducing valve. A water leakage prevention device is provided on the inner wall of the inlet, and the water leakage prevention device includes a sealing block.

[0004] The aforementioned document achieves the effect of preventing water leakage at the inlet and outlet when connected to drinking water pipes by setting a sealing block on the leak-proof device. However, it lacks pressure protection capabilities and is prone to leakage when the internal pressure is too high. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a leak-proof diverting valve to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A leak-proof diverting valve includes a metal valve housing, a valve core rotatably disposed inside the metal valve housing, a hydraulic motor fixedly mounted on the top of the metal valve housing, an inlet pipe welded to the top of one end of the outer wall of the metal valve housing, an inlet sleeve threaded to the other end of the inlet pipe, two outlet pipes welded to both sides of the middle of the outer wall of the metal valve housing, an outlet sleeve threaded to the other end of the outlet pipe, a pressure reducing pipe provided at the other end of the outer wall of the metal valve housing, and a rotating shaft pipe welded to the top of the metal valve housing.

[0008] Preferably, the valve core is tightly fitted to the inner wall of the metal valve housing, the contact surface between the valve core and the metal valve housing is uniformly coated with lubricating oil, the top of the valve core has two inlet holes with an angle of 90° for liquid inlet pipe, the middle of the valve core has two outlet holes with an angle of 90° for liquid outlet pipe, and the bottom of the valve core has two pressure relief holes with an angle of 90°.

[0009] Preferably, the outer wall of the inlet pipe is engraved with a first concave thread, the inner wall of the inlet pipe is engraved with a first convex thread, and a first sealing ring is provided on the outer wall of the inlet pipe near the metal valve body.

[0010] Preferably, the inlet sleeve is a double-ring sleeve with inner and outer rings. The inner wall of the outer ring of the inlet sleeve is engraved with a second convex thread that matches the first concave thread, and the outer wall of the inner ring of the inlet sleeve is engraved with a second concave thread that matches the first convex thread.

[0011] Preferably, the liquid outlet pipe has the same structure as the liquid inlet sleeve, and the liquid outlet sleeve has the same structure as the liquid inlet pipe.

[0012] Preferably, a flow guide tube is welded to one end of the bottom of the pressure reducing tube and connected to the metal valve housing at the other end. A pressure-resistant spring is fixedly connected to the top of the inside of the pressure reducing tube, and a piston with its outer wall tightly attached to the inner wall of the pressure-resistant spring is fixedly connected to the bottom of the pressure-resistant spring.

[0013] Preferably, the inner wall of the rotating shaft tube is engraved with multiple annular grooves, and a drive shaft with its bottom end welded to the top of the valve core and its top end rotatably connected to the actuating end of the hydraulic motor is rotatably mounted on the inner wall of the rotating shaft tube. Multiple metal rings matching the annular grooves are welded to the outer wall of the middle part of the drive shaft.

[0014] In summary, this technical solution has the following main advantages:

[0015] This utility model solves the leakage problem that may occur in traditional diverting valves during liquid inlet and outlet processes through an efficient leak-proof design and an innovative double-ring sleeve and double-thread design on the inner and outer walls. This design not only enhances the tightness of the connection, but also ensures that liquid cannot overflow from the threaded connection point by using a sealing ring, thus achieving complete leak-proof connection.

[0016] Through a pressure balancing and protection mechanism, a pressure balancing system is formed by a built-in pressure reducing tube and a pressure-resistant spring. When the liquid pressure on the inner wall of the valve core suddenly increases, this system can respond quickly by pushing the piston to compress the pressure-resistant spring to release the excess pressure. This mechanism effectively prevents component damage or leakage caused by excessive pressure, thereby extending the service life of the steering valve. Attached Figure Description

[0017] Figure 1 This is an isometric view of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram showing the overall structure of this utility model separated from its components;

[0019] Figure 3 This is a schematic diagram of the main structure of this utility model without the cover;

[0020] Figure 4 This is a schematic diagram showing the disassembled liquid inlet sleeve component of this utility model;

[0021] Figure 5 This is a schematic diagram showing the disassembled structure of the valve core of this utility model;

[0022] Figure 6 This is a side sectional view of the overall structure of this utility model.

[0023] Figure descriptions: 10. Metal valve body; 11. Valve core; 111. Inlet port; 112. Outlet port; 113. Pressure relief port; 12. Hydraulic motor; 13. Inlet pipe; 131. First concave thread; 132. First convex thread; 133. First sealing ring; 14. Inlet sleeve; 141. Second convex thread; 142. Second concave thread; 15. Outlet pipe; 16. Outlet sleeve; 17. Pressure reducing pipe; 171. Guide pipe; 172. Pressure-resistant spring; 173. Piston; 18. Rotary shaft tube; 181. Circular groove; 182. Drive shaft; 183. Metal ring. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0025] Example

[0026] Please refer to the attached document carefully. Figure 1 , 3As shown in Figures 5 and 6, a leak-proof diverting valve includes a metal valve housing 10, a valve core 11 rotatably mounted inside the metal valve housing 10, a hydraulic motor 12 fixedly mounted on the top of the metal valve housing 10, an inlet pipe 13 welded to one end of the outer wall of the metal valve housing 10, an inlet sleeve 14 threaded to the other end of the inlet pipe 13, two outlet pipes 15 welded to the middle of the outer wall of the metal valve housing 10, an outlet sleeve 16 threaded to the other end of the outlet pipe 15, a pressure reducing pipe 17 provided at the other end of the outer wall of the metal valve housing 10, and a rotating shaft pipe 18 welded to the top of the metal valve housing 10; the valve core 11 is tightly fitted to the inner wall of the metal valve housing 10, and lubricating oil is evenly applied to the contact surface between the valve core 11 and the metal valve housing 10; the top of the valve core 11 has two inlets with an included angle of 90° for the inlet pipe 13 to allow liquid to enter. The valve core 11 has two outlet holes 112 with an included angle of 90° in the middle for the outlet pipe 15 to discharge liquid, and two pressure relief holes 113 with an included angle of 90° in the bottom of the valve core 11. One end of the pressure reducing pipe 17 is welded to a guide pipe 171 with the other end welded to the metal valve shell 10. The pressure reducing pipe 17 has a pressure-resistant spring 172 fixedly connected to the top inside, and a piston 173 with its outer wall tightly attached to the inner wall of the pressure reducing pipe 17 is fixedly connected to the bottom end of the pressure-resistant spring 172. The inner wall of the rotating shaft tube 18 has multiple annular grooves 181 engraved on it. The inner ring of the rotating shaft tube 18 is rotatably mounted with a drive shaft 182 with its bottom end welded to the top of the valve core 11 and its top end rotatably connected to the actuator end of the hydraulic motor 12. The outer wall of the drive shaft 182 has multiple metal rings 183 that match the annular grooves 181 welded on it.

[0027] As described above, the hydraulic motor 12 is connected to the external hydraulic environment through its own pipeline. The hydraulic pressure changes drive the drive shaft 182, which in turn drives the valve core 11 to rotate inside the metal valve housing 10. Each rotation is 90°, and the next rotation is in the opposite direction. The multiple annular grooves 181 on the inner wall of the rotating shaft tube 18 and the metal ring 183 on the outer wall of the drive shaft 182 are tightly bonded together with lubricant. This ensures that during normal rotation, the liquid inside the metal valve housing 10 is unlikely to overflow from the gap between the rotating shaft tube 18 and the drive shaft 182, guaranteeing a tight seal. The two inlet holes 111 and two outlet holes 112 correspond vertically, while the two pressure relief holes 113 are offset by 180° from the two outlet holes 112, ensuring that the valve core 11... After rotating 90°, only the outlet pipe 15 discharges liquid, while the inlet pipe 13 and the guide pipe 171 remain unaffected. When the liquid pressure inside the valve core 11 increases dramatically, the liquid enters the pressure-reducing pipe 17 through the pressure relief hole 113 and the guide pipe 171, pushing the piston 173 upward to compress the pressure-resistant spring 172. This effectively releases the pressure of the liquid inside the valve core 11. When the pressure of the liquid inside the valve core 11 decreases, the pressure-resistant spring 172 rebounds and presses down on the piston 173, pushing the liquid in the pressure-reducing pipe 17 back into the valve core 11, thus resetting the valve. This maintains a relatively balanced pressure throughout the steering valve, effectively preventing leakage or even damage to components due to a sudden increase in liquid pressure.

[0028] Please refer to the attached document carefully. Figure 1 , 2 As shown in Figures 4 and 5, the outer wall of the inlet pipe 13 is engraved with a first concave thread 131, the inner wall of the inlet pipe 13 is engraved with a first convex thread 132, and the outer wall of the inlet pipe 13 is provided with a first sealing ring 133 at one end near the metal valve body 10; the inlet sleeve 14 is a double-ring sleeve with inner and outer rings, the inner wall of the outer ring of the inlet sleeve 14 is engraved with a second convex thread 141 matching the first concave thread 131, and the outer wall of the inner ring of the inlet sleeve 14 is engraved with a second concave thread 142 matching the first convex thread 132; the outlet pipe 15 has the same structure as the inlet sleeve 14, and the outlet sleeve 16 has the same structure as the inlet pipe 13.

[0029] As described above, during liquid inlet, the liquid flows from the inlet sleeve 14 to the inlet pipe 13. To prevent the liquid from impacting the threaded connection between the inlet sleeve 14 and the inlet pipe 13 during the liquid inlet process, causing loosening and overflow, in this embodiment, the inlet sleeve 14 is configured as an inner and outer double-ring sleeve. This makes it difficult for the liquid to impact the threaded connection when it enters. At the same time, the inner and outer double-ring sleeves of the inlet sleeve 14 and the double-threaded design of the inner and outer walls of the inlet pipe 13 can greatly enhance the fastening ability. Combined with the sealing ring at the end of the inlet pipe 13, the liquid will not overflow from the threaded connection point, thus preventing water leakage at the connection point. Similarly, since the liquid flow direction at the outlet pipe 15 and the outlet sleeve 16 is opposite, the structure of the outlet pipe 15 and the outlet sleeve 16 should also be opposite to that of the inlet pipe 13 and the inlet sleeve 14 to ensure that there is no water leakage during liquid inlet and outlet.

[0030] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model.

Claims

1. A leak-proof diverting valve, comprising a metal valve housing (10), wherein a valve core (11) is rotatably disposed inside the metal valve housing (10), and a hydraulic motor (12) is fixedly mounted on the top of the metal valve housing (10), characterized in that, The metal valve housing (10) has an inlet pipe (13) welded to the top of one end of its outer wall, and an inlet sleeve (14) threaded to the other end of the inlet pipe (13). Two outlet pipes (15) are welded to the two sides of the middle part of the outer wall of the metal valve housing (10), and an outlet sleeve (16) threaded to the other end of the outlet pipe (15). A pressure reducing pipe (17) is provided at the other end of the metal valve housing (10), and a rotating shaft pipe (18) is welded to the top of the metal valve housing (10).

2. The anti-leakage diverting valve according to claim 1, characterized in that, The valve core (11) is tightly attached to the inner wall of the metal valve housing (10). The contact surface between the valve core (11) and the metal valve housing (10) is uniformly coated with lubricating oil. The top of the valve core (11) has two inlet holes (111) with an angle of 90° for the inlet pipe (13) to receive liquid. The middle of the valve core (11) has two outlet holes (112) with an angle of 90° for the outlet pipe (15) to receive liquid. The bottom of the valve core (11) has two pressure relief holes (113) with an angle of 90°.

3. The anti-leakage diverting valve according to claim 1, characterized in that, The outer wall of the liquid inlet pipe (13) is engraved with a first concave thread (131), the inner wall of the liquid inlet pipe (13) is engraved with a first convex thread (132), and a first sealing ring (133) is provided on the outer wall of the liquid inlet pipe (13) near the metal valve body (10).

4. A leak-proof diverting valve according to claim 3, characterized in that, The liquid inlet sleeve (14) is a double-ring sleeve with inner and outer rings. The inner wall of the outer ring of the liquid inlet sleeve (14) is engraved with a second convex thread (141) that matches the first concave thread (131), and the outer wall of the inner ring of the liquid inlet sleeve (14) is engraved with a second concave thread (142) that matches the first convex thread (132).

5. A leak-proof diverting valve according to claim 1, characterized in that, The liquid outlet pipe (15) has the same structure as the liquid inlet sleeve (14), and the liquid outlet sleeve (16) has the same structure as the liquid inlet pipe (13).

6. A leak-proof diverting valve according to claim 1, characterized in that, The pressure reducing tube (17) has a flow guide tube (171) welded to one end of its bottom and connected to the metal valve shell (10) at the other end. A pressure-resistant spring (172) is fixedly connected to the top of the inside of the pressure reducing tube (17). A piston (173) with its outer wall tightly attached to the inner wall of the pressure reducing tube (17) is fixedly connected to the bottom of the pressure-resistant spring (172).

7. A leak-proof diverting valve according to claim 1, characterized in that, The inner wall of the rotating shaft tube (18) is engraved with multiple annular grooves (181). The inner ring of the rotating shaft tube (18) is rotatably mounted with a drive shaft (182) whose bottom end is welded to the top of the valve core (11) and whose top end is rotatably connected to the actuating end of the hydraulic motor (12). Multiple metal rings (183) matching the annular grooves (181) are welded on the outer wall of the middle part of the drive shaft (182).

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