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CN-115539673-B - Rotary switching valve

CN115539673BCN 115539673 BCN115539673 BCN 115539673BCN-115539673-B

Abstract

The invention provides a rotary switching valve which comprises a shell, a rotor, a driving unit and an elastic adjusting device, wherein a cavity is formed in the shell, the rotor is positioned in the cavity, one end face of the rotor is contacted with the wall surface of the cavity to form a sealing surface, the other end face of the rotor is provided with a pressing groove, a plurality of elastic adjusting devices are arranged on the shell, one end of each elastic adjusting device is contacted with the pressing groove, precompression is provided by the elastic adjusting devices, one end face of the rotor is contacted with the wall surface of the cavity in the rotating process, a rotating shaft of the rotor is supported on the shell, the rotating shaft is connected with the driving unit, at least 2 flow channels are formed in the shell, one end face of the rotor contacted with the wall surface of the cavity is provided with at least 1 connecting channel, the 2 flow channels are communicated or blocked through the connecting channels by rotating the rotor, and one end of each elastic adjusting device is contacted with the pressing groove, so that the lower end face of the rotor is axially extruded on the contact surface of the lower shell, and the sealing effect of the contact surface can be ensured.

Inventors

  • ZHANG WENYU
  • DONG FEI
  • NI JIE
  • YIN BIFENG
  • GONG YI
  • JIA HEKUN
  • XIE XUAN

Assignees

  • 江苏大学

Dates

Publication Date
20260512
Application Date
20220906

Claims (6)

  1. 1. The rotary switching valve is characterized by comprising a shell, a rotor (10), a driving unit and an elastic adjusting device (9), wherein a cavity is formed in the shell, the rotor (10) is positioned in the cavity, one end face of the rotor (10) is contacted with the wall surface of the cavity to form a sealing surface, a pressing groove is formed in the other end face of the rotor (10), a plurality of elastic adjusting devices (9) are arranged on the shell, one end of each elastic adjusting device (9) is contacted with the pressing groove, and pre-compression is provided through the elastic adjusting device (9), so that one end face of the rotor (10) is contacted with the wall surface of the cavity in the rotating process; The rotary shaft (2) of the rotor (10) is supported on a shell, the rotary shaft (2) is connected with a driving unit, at least 2 flow channels are arranged on the shell, at least 1 connecting channel is arranged on one end face of the rotor (10) which is contacted with the wall surface of the cavity, and the 2 flow channels are communicated or blocked through the connecting channels by rotating the rotor (10); The rotary sealing ring (5) is arranged between the circumferential surface of the rotor (10) and the wall surface of the cavity, the rotary sealing ring (5) is a Y-shaped sealing ring, a Y-shaped opening of the Y-shaped sealing ring faces the sealing surface, a leakage cavity (12) is formed among the sealing surface, the rotary sealing ring (5), the rotor (10) and the shell, a plurality of side leakage channels (11) are arranged in the shell, the side leakage channels (11) are in one-to-one correspondence with the elastic adjusting device (9), one end of each side leakage channel (11) is communicated with the leakage cavity (12), the other end of each side leakage channel (11) is communicated with a piston cavity of the elastic adjusting device (9), a movable piston (9-2) is arranged in the elastic adjusting device (9), and the fluid in the leakage cavity (12) flows into the side leakage channels (11) to compress a medium in the side leakage channels (11) so that the piston (9-2) in the elastic adjusting device (9) moves downwards to press the sealing surface of the rotor (10); The elastic adjusting device (9) comprises a shell (9-1), a piston (9-2), a connecting hole (9-3), a ball head push rod (9-4) and a spring (9-5), wherein threads are arranged on the outer side of the shell (9-1) and used for being installed on the shell (4), the piston (9-2), the ball head push rod (9-4) and the spring (9-5) are located in the shell (9-1), the piston (9-2) can be axially and movably installed in a piston cavity in the shell (9-1), a spring (9-5) is arranged between one end of the piston (9-2) and the ball head push rod (9-4), one end of the ball head push rod (9-4) extends out of the shell (9-1), a ball head of the ball head push rod (9-4) is in contact with a pressing groove of a rotor (10), the connecting hole (9-3) is formed in the piston cavity, and the other end of the side leakage channel (11) is communicated with the piston cavity through the connecting hole (9-3); The piston (9-2) is a double-piston, the two pistons are connected through a connecting rod, a piston cavity is arranged in a cavity between the two pistons, a connecting hole (9-3) is formed in the piston cavity, the other end of the side leakage channel (11) is communicated with the piston cavity through the connecting hole (9-3), an upper limiting block (9-6) is arranged in the shell (9-1), and the connecting rod between the two pistons of the double-piston is conical, so that the compression area of the lower piston surface is larger than that of the upper piston surface.
  2. 2. The rotary switching valve according to claim 1, wherein a concave spigot is arranged on the wall surface of the cavity, a sealing gasket (8) is arranged in the concave spigot, one end surface of the rotor (10) is used as a convex spigot, the convex spigot is matched with the concave spigot, and a through hole corresponding to the flow passage is arranged on the sealing gasket (8).
  3. 3. The rotary switching valve according to claim 1, wherein the rotary shaft (2) is connected with a revolute pair of the rotor (10), and the rotor (10) is movably mounted on the rotary shaft (2), and the elastic adjusting device (9) axially moves the rotor (10) by an external force provided for pressing the sealing surface.
  4. 4. The rotary switching valve according to claim 1, wherein a liquid detector is installed in the side leakage passage (11) near the connecting hole (9-3) for detecting whether liquid enters the connecting hole (9-3), a protrusion (9-7) is provided at the upper part of the ball push rod (9-4), the protrusion (9-7) penetrates into the spring (9-5), and when the spring (9-5) is compressed, the piston (9-2) contacts with the protrusion (9-7) for moving the ball push rod (9-4).
  5. 5. The rotary switching valve according to claim 1, wherein the side leakage channel (11) comprises a first side leakage channel and a second side leakage channel, the second side leakage channel is communicated with the leakage cavity (12), the first side leakage channel is communicated with a piston cavity between two pistons, the cross-sectional area of the second side leakage channel is larger than that of the first side leakage channel, a valve core (11-1) is installed in the first side leakage channel, the valve core is magnetic, the position of the valve core is controlled through an external magnetic field, and the valve core is used for resetting or controlling the valve core to move to apply pressure to gas of the first side leakage channel.
  6. 6. The rotary switching valve of claim 1, further comprising an external pneumatic system, wherein the movement of the spool in the second side leakage passage to the set position triggers the external pneumatic system to communicate with the first side leakage passage.

Description

Rotary switching valve Technical Field The invention relates to the technical field of valves or the technical field of flow passage switching equipment, in particular to a rotary switching valve. Background Among various hydraulic transmission devices, a hydraulic control valve is an indispensable element, and among directional control valves, a hydraulic electromagnetic directional valve is a solenoid valve which is used in industrial control at present and has an important role in controlling fluid flow direction, pressure and the like. In the prior art, the hydraulic electromagnetic directional valve controls the on-off of the corresponding oil way by the linear motion of the valve core, and the complex shoulder and slot design on the valve core is needed to meet the hydraulic characteristic requirements of various hydraulic systems. Other structures of such hydraulic solenoid directional valves, in particular the drive mechanism, are also relatively complex. This can make the cost of this kind of hydraulic pressure electromagnetic reversing valve higher, and processing is relatively difficult, and the equipment is also comparatively loaded down with trivial details. And such valves require space for the spool to move. In the refrigeration system in the field of new energy automobiles, a reversing valve is generally adopted to realize the conversion function of refrigeration and heating. With the development of industry, large-scale refrigeration equipment is also continuously applied to the refrigeration industry. The refrigerating capacity requirement of the reversing valve is continuously improved, the volume requirement of a reversing valve product is required to be large, the existing hydraulic electromagnetic reversing valve cannot meet the requirement of large flow, and on one hand, the interface size is related to cost, and on the other hand, the installation space is mainly limited. Therefore, the rotary reversing valve with a larger structure is mostly adopted at the present stage to switch the refrigerating/heating functions of the system, however, the rotary reversing valve has poor sealing effect and can not give an alarm in time. Disclosure of Invention According to the rotary switching valve, the rotor is positioned in the cavity formed in the upper shell and the lower shell, the lower end face of the rotor is attached to the lower shell, one end of the elastic adjusting device is contacted with the pressing groove, and the lower end face of the rotor can axially press the contact surface of the lower shell, so that the sealing effect of the contact surface can be ensured. The present invention achieves the above technical object by the following means. The rotary switching valve comprises a shell, a rotor, a driving unit and an elastic adjusting device, wherein a cavity is formed in the shell, the rotor is positioned in the cavity, one end face of the rotor is contacted with the wall surface of the cavity to form a sealing surface, the other end face of the rotor is provided with a pressing groove, a plurality of elastic adjusting devices are arranged on the shell, one end of each elastic adjusting device is contacted with the pressing groove, and pre-pressure is provided through the elastic adjusting device, so that one end face of the rotor is contacted with the wall surface of the cavity in the rotating process; the elastic regulating device comprises a shell, a rotor, a pressing groove, a rotary shaft, at least 2 runners, at least 1 connecting channel, an elastic regulating device and a sealing effect, wherein the rotary shaft of the rotor is supported on the shell and is connected with the driving unit, at least 2 runners are arranged on the shell, one end face of the rotor, which is contacted with the wall surface of a cavity, is provided with at least 1 connecting channel, the 2 runners are communicated or blocked through the connecting channel by rotating the rotor, one end of the elastic regulating device is contacted with the pressing groove, and the lower end face of the rotor can axially press the contact surface of the lower shell, so that the sealing effect of the contact surface can be ensured. Further, a concave spigot is arranged on the wall surface of the cavity, a sealing gasket is arranged in the concave spigot, one end surface of the rotor is used as a convex spigot, the convex spigot is matched with the concave spigot, a through hole is formed in the sealing gasket and corresponds to the flow passage, positioning of the lower end surface of the rotor is facilitated, and the sealing gasket is prevented from being pressed eccentrically to cause leakage when the lower end surface of the rotor extrudes the sealing gasket. The elastic adjusting device enables the rotor to axially move under the external force by providing the external force and is used for compressing the sealing surface. Further, a rotary sealing ring is arranged between the peripheral surface of the ro