Automatic reversing valve

Abstract

An automatic reversing valve comprises a valve disc, the valve disc comprises a rotating core, a disc body and a disc cover, a disc-shaped cavity is formed in the disc body, a liquid inlet protruding pipe is arranged in the disc-shaped cavity, a liquid inlet is formed in the liquid inlet protruding pipe, a plurality of liquid outlets are formed in the side face of the disc-shaped cavity, a limiting circular groove is formed in the position, between every two liquid outlets, of the side wall of the disc-shaped cavity, and the rotating core is rotationally arranged on the liquid inlet protruding pipe in a sleeving mode. A liquid flow hole is formed in the side face of the rotating core, two baffles are arranged on the portions, on the two sides of the liquid flow hole, of the rotating core respectively, an elastic clamping piece is arranged on the outer wall of one baffle, and the elastic clamping piece can be in clamping fit with the limiting circular groove; the disc-shaped cavity is filled with a sealing gasket between the outer walls of the two baffles, and the sealing gasket and the inner wall of the disc-shaped cavity are in abutting sealing fit; the liquid flow hole faces the inner wall of one baffle; automatic reversing is achieved according to changes of internal pressure, and compared with a reversing valve in a motorized mode, a manual mode and the like, energy consumption of long-term work is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of control valves, and particularly relates to an automatic reversing valve. Background Art

[0002] At present, a reversing valve is a control valve used to change the liquid flow conveying channel or direction, realizing single-liquid multi-delivery. Almost all existing reversing valves are non-autonomous control types such as mechanical, pneumatic, and manual. Long-term operation consumes a large amount of energy resources. In the application of liquid infusion, for some working requirements (such as multi-pipe low-pressure liquid delivery, oil filling, etc.), using this non-autonomous reversing valve will increase the operation cost. Content of the Utility Model

[0003] In order to solve the above problems, the utility model provides an automatic reversing valve:

[0004] An automatic reversing valve includes a valve disc. The valve disc includes a rotating core, a disc body and a disc cover connected by threads. A disc-shaped cavity is provided inside the disc body. A liquid inlet convex tube is provided at the center of the bottom of the disc-shaped cavity, and a liquid inlet is provided on the liquid inlet convex tube. A plurality of liquid outlets are evenly arranged around the side wall of the disc-shaped cavity. A limiting circular groove is provided on the side wall of the disc-shaped cavity between every two of the liquid outlets. The rotating core is rotatably sleeved on the liquid inlet convex tube and the upper end is in top position cooperation with a central convex block provided on the disc cover. The inside of the rotating core is hollow and liquid flow holes are provided on the side. Two baffle plates are respectively provided on both sides of the liquid flow holes on the side of the rotating core, and the two baffle plates and the inner wall of the disc-shaped cavity form a top-against sealing cooperation. An elastic clamping member is provided on the outer wall of one of the baffle plates. The elastic clamping member can form a clamping cooperation with the limiting circular groove to form a liquid flow cavity communicating the liquid flow holes between the two baffle plates. The liquid flow cavity can and can only communicate the liquid flow holes with one of the liquid outlets; A sealing gasket formed integrally is filled between the outer walls of the two baffle plates in the disc-shaped cavity. The sealing gasket and the inner wall of the disc-shaped cavity form a top-against sealing cooperation; The liquid flow holes face the inner wall of one of the baffle plates.

[0005] Preferably, the elastic clamping member is installed on a convex seat provided on the baffle plate. The convex seat is provided with an installation hole. The elastic clamping member includes a clamping ball, a spring and a fastening block located in the installation hole. A limiting shoulder is provided at the outer end of the installation hole. The limiting shoulder constitutes the top-against limit of the clamping ball. The fastening block is in threaded cooperation with the installation hole. The clamping ball, the spring and the fastening block are sequentially in top-against cooperation. The clamping ball can form a clamping cooperation with the limiting circular groove. By rotating the rotating core, the position where the clamping ball contacts the inner wall of the disc-shaped cavity is changed. The clamping ball is kept in a state of outward pressing by the action of the spring, and a clamping cooperation is formed when the clamping ball moves to the limiting circular groove.

[0006] Preferably, one of the liquid outlets is connected to a reflux pipe, and the reflux pipe is provided with a stop valve. When the liquid flow chamber is connected to the reflux pipe, the incoming liquid will directly enter the reflux pipe. During pre-reversal, the liquid flow can be blocked by the stop valve. Continuous liquid inflow into the liquid flow chamber will drive the impacted baffle to swing. The liquid flow impacts the baffle to cause the positioning ball to be forced to retract and disengage from the limiting circular groove. The baffle swings to the positioning ball to form a positioning fit with the next limiting circular groove. At this time, the internal pressure is relatively small and the liquid outlet connected to the liquid flow chamber will continue to be infused. The infusion obtains the internal pressure threshold, and similarly, it is swung to the next position to infuse the next liquid outlet, thereby realizing automatic reversal. During the continuous automatic reversal process, the stop valve can be operated to not block the flow, so that after all infusions are completed, the liquid flow chamber returns to the state of being connected to the reflux pipe, so that the infusion can reflux, thereby ensuring the safety and stability of the internal pressure.

[0007] Preferably, the depth of the limiting circular groove is greater than the radius of the locking ball, so that in the locked state, the limiting ring shoulder and the locking ball form abutment and limit, blocking the installation hole to prevent foreign matter from entering in the liquid delivery state.

[0008] Preferably, the baffle is an arc-shaped plate, and the state of the arc-shaped plate is set according to the direction of the rotating core of the automatic reversing, which can effectively reduce the swing resistance of the baffle and improve the reversing efficiency.

[0009] The utility model has the following beneficial effects: liquid is continuously introduced into the liquid inlet, the liquid flow impacts the corresponding baffle, and the internal pressure of the liquid flow cavity increases. If the elastic locking piece is not in the locking state, the rotating core will rotate to make the elastic locking piece enter the locking state, at this time, the corresponding liquid outlet is filled with liquid, the liquid flow hole continuously discharges liquid and the internal pressure of the liquid flow cavity continues to increase, the internal pressure reaches the threshold value, and it will be out of the locking state, the baffle swings accordingly, and the liquid flow cavity is switched to connect to the next liquid outlet, and continued swinging will cause the elastic locking piece to be locked by the next limiting circular groove, and remain locked at a certain internal pressure until the internal pressure reaches the threshold value and the locking is disengaged again, and similarly, the next liquid outlet is switched to be infused, and automatic reversing is realized according to the change of internal pressure. Compared with reversing valves of mechanical, manual and other modes, the energy consumption of long-term operation is greatly reduced. In addition, during the liquid delivery and reversing process, the sealing gasket keeps the liquid outlet that is not infused in a closed state, thereby ensuring the stability of the internal pressure of each liquid outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of an embodiment.

[0011] Figure 2 Schematic diagram of the internal structure of the embodiment.

[0012] Figure 3 Schematic diagram of the installation principle of the rotating core of the embodiment.

[0013] Figure 4 Schematic diagram of the installation principle of the elastic locking member of the embodiment.

[0014] 1. Rotating core; 2. Disk body; 3. Disk cover; 4. Liquid inlet convex pipe; 5. Liquid inlet; 6. Liquid outlet; 7. Limiting circular groove; 8. Central convex block; 9. Liquid flow hole; 10. Baffle; 11. Elastic clamping member; 12. Liquid flow cavity; 13. Sealing gasket; 14. Convex seat; 15. Mounting hole; 16. Clamping ball; 17. Spring; 18. Fastening block; 19. Limiting ring shoulder; 20. Return pipeline; 21. Stop valve. Specific embodiments

[0015] The following will further illustrate the present utility model in conjunction with Figures 1 to 4 the accompanying drawings and embodiments.

[0016] An automatic reversing valve includes a valve disk. The valve disk includes a rotating core 1, a disk body 2 and a disk cover 3 which are threadedly connected. A disk-shaped cavity is provided inside the disk body 2. A liquid inlet convex pipe 4 is provided at the center of the bottom of the disk-shaped cavity, and a liquid inlet 5 is provided on the liquid inlet convex pipe 4. A plurality of liquid outlets 6 are evenly arranged around the side wall of the disk-shaped cavity. In this embodiment, four liquid outlets 6 are provided. A limiting circular groove 7 is provided on the side wall of the disk-shaped cavity between every two liquid outlets 6. The rotating core 1 is rotatably sleeved on the liquid inlet convex pipe 4 and the upper end is in top fit with the central convex block 8 provided on the disk cover 3. The inside of the rotating core 1 is hollow and liquid flow holes 9 are provided on the side surface. Two baffles 10 are respectively provided on both sides of the liquid flow hole 9 on the side surface of the rotating core 1, and the two baffles 10 and the inner wall of the disk-shaped cavity form a top-against sealing fit. An elastic clamping member 11 is provided on the outer wall of one of the baffles 10, and the elastic clamping member 11 can form a clamping fit with the limiting circular groove 7, and a liquid flow cavity 12 communicating with the liquid flow hole 9 is formed between the two baffles 10. The liquid flow cavity 12 can and can only communicate the liquid flow hole 9 with one liquid outlet 6; A sealing gasket 13 integrally formed is filled between the outer walls of the two baffles 10 in the disk-shaped cavity, and the sealing gasket 13 and the inner wall of the disk-shaped cavity form a top-against sealing fit; The liquid flow hole 9 faces the inner wall of one of the baffles 10.

[0017] The elastic clamping member 11 is installed on the convex seat 14 provided on the baffle 10. The convex seat 14 is provided with a mounting hole 15. The elastic clamping member 11 includes a clamping ball 16, a spring 17 and a fastening block 18 located in the mounting hole 15. A limiting ring shoulder 19 is provided at the outer end of the mounting hole 15, and the limiting ring shoulder 19 constitutes the top-against limit of the clamping ball 16. The fastening block 18 is threadedly fitted in the mounting hole 15. The clamping ball 16, the spring 17 and the fastening block 18 are sequentially in top-against fit. The clamping ball 16 can form a clamping fit with the limiting circular groove 7. By rotating the rotating core 1, the position where the clamping ball 16 contacts the inner wall of the disk-shaped cavity is changed. The clamping ball 16 is kept in a state of outward pressing by the action of the spring 17, and a clamping fit is formed when the clamping ball 16 moves to the limiting circular groove 7.

[0018] One of the liquid outlets 6 is connected to a reflux pipe 20, and the reflux pipe 20 is provided with a stop valve 21. When the liquid flow chamber 12 is connected to the reflux pipe 20, the incoming liquid will directly enter the reflux pipe 20. During pre-reversing, the liquid flow can be blocked by the stop valve 21. The continuous inflow of liquid into the liquid flow chamber 12 will drive the impacted baffle 10 to swing. Based on the impact of the liquid flow on the baffle 10, the positioning ball 16 is forced to retract and disengage from the limiting circular groove 7. The baffle 10 swings to the positioning ball 16 to form a positioning match with the next limiting circular groove 7. At this time, the internal pressure is relatively small and the liquid outlet 6 connected to the liquid flow chamber 12 will continue to be infused. The infusion obtains the internal pressure threshold, and similarly it is swung to the next position to infuse the next liquid outlet 6 to realize automatic reversing. During the continuous automatic reversing process, the stop valve 21 can be operated so as not to block it, so that after all the infusions are completed, the liquid flow chamber 12 returns to the state of being connected to the reflux pipe 20, so that the infusion refluxes, and the internal pressure is guaranteed to be safe and stable.

[0019] The depth of the limiting circular groove 7 is greater than the radius of the locking ball 16, so that in the locked state, the limiting ring shoulder 19 and the locking ball 16 form abutment and limit, so as to block the mounting hole 15 and prevent foreign matter from entering in the liquid delivery state. The baffle 10 is an arc plate, and the state of the arc plate is set according to the direction of the automatic reversing core 1, which can effectively reduce the swing resistance of the baffle 10 and improve the reversing efficiency.

[0020] Working principle: When used for the first time after connecting all pipelines, the liquid inlet 5 continues to flow, the liquid flow impacts the corresponding baffle 10, and the internal pressure of the liquid flow chamber 12 increases. If the locking ball 16 is not in the locking state, the rotating core 1 will rotate to make the locking ball 16 snap into the limiting circular groove 7. At this time, the corresponding liquid outlet 6 is filled with liquid, the liquid flow hole 9 continues to discharge liquid, and the internal pressure of the liquid flow chamber 12 continues to increase. When the internal pressure reaches the threshold, the locking ball 16 is pushed back and retracted, and the baffle 10 swings accordingly. The liquid flow chamber 12 switches to connect to the next liquid outlet 6. Continuing to swing will cause the locking ball 16 to be pushed by the next The limiting circular groove 7 forms a locking position, which remains locked at a certain internal pressure until the internal pressure reaches a threshold value and pushes back the locking ball 16 again. Similarly, the next liquid outlet 6 is switched for infusion to achieve automatic reversing. Compared with reversing valves of mechanical, manual and other methods, it greatly reduces energy consumption. After all infusions are completed, the liquid flow cavity 12 returns to a state of being connected to the reflux pipe 20, so that the infused liquid can flow back and ensure the safety and stability of the internal pressure. During the liquid delivery and reversing process, the sealing gasket 13 maintains the closed state of the liquid outlet 6 that is not infused, ensuring the stability of the internal pressure of each liquid outlet 6.

[0021] Obviously, the above embodiments of the present utility model are merely examples for illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And these obvious changes or modifications derived from the essential spirit of the present utility model still fall within the protection scope of the present utility model.

Claims

1. An automatic reversing valve, characterized in that: The valve disc comprises a rotating core (1), a threaded disc body (2) and a disc cover (3); a disc-shaped cavity is provided in the disc body (2); a liquid inlet convex tube (4) is provided at the bottom center of the disc-shaped cavity, and a liquid inlet port (5) is provided on the liquid inlet convex tube (4); a plurality of liquid outlets (6) are evenly arranged around the side of the disc-shaped cavity; a limiting circular groove (7) is provided on the side wall of the disc-shaped cavity between every two of the liquid outlets (6); the rotating core (1) is rotatably sleeved on the liquid inlet convex tube (4) and the top position of the upper end is matched with a central convex block (8) provided on the disc cover (3); the rotating core (1) is hollow inside and a liquid flow hole (9) is provided on the side; two baffles ( 10), and the two baffles (10) form abutment sealing cooperation with the inner wall of the disc-shaped cavity, the outer wall of one of the baffles (10) is provided with an elastic retaining piece (11), and the elastic retaining piece (11) can form a retaining cooperation with the limiting circular groove (7), and a liquid flow cavity (12) connected to the liquid flow hole (9) is formed between the two baffles (10), and the liquid flow cavity (12) can and can only connect the liquid flow hole (9) with one of the liquid outlets (6); the disc-shaped cavity is filled with an integrally formed sealing gasket (13) between the outer walls of the two baffles (10), and the sealing gasket (13) forms abutment sealing cooperation with the inner wall of the disc-shaped cavity; the liquid flow hole (9) faces the inner wall of one of the baffles (10).

2. An automatic reversing valve according to claim 1, characterized in that: The elastic locking member (11) is installed on a convex seat (14) provided on the baffle (10), and the convex seat (14) is provided with a mounting hole (15). The elastic locking member (11) includes a locking ball (16), a spring (17) and a fastening block (18) located in the mounting hole (15). The outer end of the mounting hole (15) is provided with a limiting ring shoulder (19), and the limiting ring shoulder (19) constitutes abutment and limitation of the locking ball (16). The fastening block (18) is threadedly engaged with the mounting hole (15). The locking ball (16), the spring (17) and the fastening block (18) are pressed and matched in turn, and the locking ball (16) can form a locking fit with the limiting circular groove (7).

3. The automatic reversing valve according to claim 1, characterized in that: One of the liquid outlets (6) is connected to a reflux pipeline (20), and the reflux pipeline (20) is provided with a stop valve (21).

4. An automatic reversing valve according to claim 2, characterized in that: The depth of the limiting circular groove (7) is greater than the radius of the locking ball (16).

5. The automatic reversing valve according to claim 1, characterized in that: The baffle (10) is an arc-shaped plate.

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