Rotary-cut valve capable of preventing pull-in jamming and control method

Abstract

The invention relates to a rotary-cut valve capable of preventing suction jamming and a control method, and the rotary-cut valve comprises a rotary-cut valve head which is provided with a cleaning inlet flow channel, a cleaning outlet flow channel and a working flow channel; the stator is mounted in the rotary-cut valve head; the stator is provided with a first flow channel communicating with the cleaning inlet, a second flow channel communicating with the cleaning outlet flow channel and sub flow channels communicating with the working flow channels in a one-to-one correspondence mode. The rotor is in running fit with the stator; a cleaning groove is formed in the middle of the rotor and communicates with the first flow channel and the second flow channel. An arc-shaped groove is formed in the edge of the rotor; the arc-shaped groove is communicated with two adjacent sub-runners; the motor is connected with a rotating shaft; the rotating shaft is connected with the rotor, and a first elastic piece is connected to the rotating shaft; and the cleaning assembly communicates with the cleaning inlet flow channel. According to the rotary-cut valve, impurities of the rotary-cut valve can be cleaned, desorption treatment is conducted, and it is guaranteed that the rotary-cut valve can be normally started.

Description

Technical Field

[0001] The present application relates to the technical field of medical equipment, and in particular to a rotary cutting valve and a control method thereof that can prevent suction and jamming. Background Art

[0002] The rotary cutting valve is mainly used to switch between different flow channels and is often used in medical equipment. The rotary cutting valve can refer to the existing technology with the announcement number CN119084606B. The rotor is usually provided with an elastic part to drive the rotor and the stator to fit together to ensure the sealing. Therefore, there is a certain pressure between the rotor and the stator. On the one hand, the rotor and the stator are usually made of metal, plastic, and ceramic, which will encounter friction surface grinding, grinding chips, and crystallization of circulating reagents. When the medical equipment is shut down or turned off for a long time, the grinding powder and crystals enter the friction surface and easily cause jamming, resulting in lost steps. In severe cases, it can cause damage, causing the medical equipment to stop and fail to work. On the other hand, under the conditions of long-term shutdown or power outage, the contact surface of the stator and the rotor will be attracted, causing the rotary cutting torque to reach dozens or hundreds of times the original torque, resulting in the motor being unable to twist the rotor and the rotary cutting failing.

[0003] Therefore, it is necessary to provide a rotary cutting valve and a control method that can clean the grinding debris and crystals and prevent the stator and rotor from being attracted to each other and causing rotary cutting failure. Summary of the Invention

[0004] Based on this, it is necessary to provide a rotary shear valve and a control method that can prevent the valve from being stuck when being sucked in. The specific technical solution is as follows.

[0005] A rotary cut valve for preventing suction and jamming, comprising: The rotary cutting valve head is provided with a cleaning inlet flow channel, a cleaning outlet flow channel and a working flow channel; a plurality of working flow channels are arranged around the rotary cutting valve head; the cleaning outlet flow channel is connected to a safety valve; The stator is installed in the rotary cutting valve head; the stator is provided with a first flow channel connected to the cleaning inlet, a second flow channel connected to the cleaning outlet flow channel, and a sub-flow channel connected to the working flow channel in a one-to-one correspondence; The rotor is rotatably engaged with the stator; a cleaning groove is provided in the middle of the rotor, the cleaning groove is connected to the first flow channel and the second flow channel; an arc-shaped groove is provided on the edge of the rotor, the arc-shaped groove is connected to two adjacent sub-flow channels; and the cleaning groove and the arc-shaped groove are not connected to each other; A motor connected to a rotating shaft; the rotating shaft is connected to the rotor, and a first elastic member is connected to the rotating shaft, wherein the first elastic member has elastic potential energy for driving the rotor to press against the stator; The cleaning component is communicated with the cleaning inlet flow channel and is used for injecting cleaning medium into the cleaning inlet flow channel.

[0006] Furthermore, the cleaning component includes: The pressure storage tank is connected to the cleaning inlet flow channel through a back pressure valve; The pressure storage device is connected to the pressure storage tank and is used to inject cleaning medium into the pressure storage tank and store pressure in the pressure storage tank.

[0007] Furthermore, the pressure storage device includes: The cam mechanism is connected to the motor in a transmission manner; the motor is a dual-axis stepping motor that synchronously drives the cam mechanism and the rotating shaft to rotate; A push rod is installed in the housing so as to be movable along the axis direction; the push rod abuts against the cam mechanism, so that when the cam mechanism rotates, the push rod is driven to move along the axis direction; A piston cylinder having a piston passage therein; the piston cylinder is connected to an inlet one-way valve and an outlet one-way valve; the piston passage is connected to the cleaning medium storage tank through the inlet one-way valve and is connected to the pressure storage tank through the outlet one-way valve; The piston rod is movably connected in the piston channel and is connected to the push rod.

[0008] Furthermore, the push rod is connected to a second elastic member, and the second elastic member has elastic member potential energy for driving the push rod to move away from the piston cylinder.

[0009] Furthermore, a three-way switching valve is provided between the back pressure valve and the cleaning inlet flow channel; one end of the three-way switching valve is connected to the back pressure valve, one end is connected to the cleaning inlet flow channel, and one end is connected to the atmosphere.

[0010] Furthermore, a pressure sensor is provided at one end of the first elastic member away from the rotor.

[0011] A control method using any of the above rotary cutting valves comprises the following steps: Determine whether the rotary cutting valve is in a long-term storage state; If the rotary cut valve is in a long-term idle state, it is further determined whether the motor is in a step-lost state; if the motor is in a step-lost state, the motor is corrected for step-lost; if the motor is in a non-step-lost state, it is further determined whether the rotary cut valve is in an idle state; If the rotary cut valve is not in a long-term idle state, further determine whether the rotary cut valve is in an idle state; If the rotary cut valve is in an idle state, it should be deactivated and closed; If the rotary cutting valve is not in an idle state, clean it.

[0012] Furthermore, the process of the lost step correction includes: Connecting the cleaning inlet flow channel to the cleaning assembly, and injecting cleaning medium into the cleaning inlet flow channel through the cleaning assembly; The anti-sucking reverse pressure value is preset to P, P=50%*M, M is the pressure value of the first elastic member detected by the pressure sensor; Set the threshold of the safety valve to P, and gradually increase the pressure of the cleaning inlet flow channel until the pressure value of the safety valve reaches the threshold P; Start the motor and release the pressure of the safety valve, then check again whether there is any step loss; If the step is still lost, increase the anti-pull-in reverse pressure value by 10%*M each time and repeat the step loss correction.

[0013] Furthermore, the desorption process includes: Connecting the cleaning inlet flow channel to the cleaning assembly, and injecting cleaning medium into the cleaning inlet flow channel through the cleaning assembly; The anti-sucking reverse pressure value is preset to P, P=50%*M, M is the pressure value of the first elastic member detected by the pressure sensor; Set the threshold of the safety valve to P, and gradually increase the pressure of the cleaning inlet flow channel until the pressure value of the safety valve reaches the threshold P.

[0014] Furthermore, the cleaning inlet flow channel is connected to the cleaning assembly, and a cleaning medium is injected into the cleaning inlet flow channel through the cleaning assembly; Set the maximum cleaning pressure to Q, Q = (2 * EM) * 90%, E is the factory preset pressure value of the first elastic member; Adjust the pressure threshold of the cleaning inlet flow channel to Q and the threshold of the safety valve to M*40% Beneficial effects: The present invention provides a rotary cutting valve that prevents suction and jamming, which, by arranging a cleaning groove on the rotor, reduces the contact area between the stator and the rotor, thereby reducing the vacuum adsorption pressure between the stator and the rotor, thereby reducing the rotary cutting torque after suction and reducing the reverse pressure required for de-suction; on the other hand, during the friction between the stator and the rotor, powder and crystals will move toward the hollow cleaning groove, and the powder and crystals will be taken away by the cleaning medium to achieve the purpose of cleaning.

[0015] The present invention provides a control method for using a rotary cutting valve. When the rotary cutting valve is in a state of long-term storage, idleness, loss of step, etc., the cleaning pressure can be adjusted according to the pressure of the elastic part, thereby performing de-engagement, loss of step correction and other processing, ensuring that the rotary cutting valve can be started normally, avoiding foreign matter from entering the friction surface as much as possible, and avoiding the rotary cutting valve from getting stuck. Unmanned operation can be achieved, which greatly reduces the workload of medical equipment maintenance operators and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 Schematic diagram of the overall structure of the rotary cutting valve; Figure 2 This is a partial explosion diagram of the rotary cutting valve; Figure 3 It is a cross-sectional view of the rotary cutting valve; Figure 4 This is a schematic diagram of the rotary cutting valve from another perspective; Figure 5 is a flow chart of the control method; Figure 6 The figure is the overall flow chart of the control method.

[0018] Explanation of the accompanying symbols: 1. Turn counting code disk; 2. Counting sensor; 3. Cam mechanism; 4. Push rod; 5. Motor; 6. Rotary cut valve seat; 7. Rotary cut valve head; 8. Safety valve; 9. Three-way switching valve; 10. Back pressure valve; 11. Controller; 12. Pressure storage tank; 13. Outlet end; 14. Piston cylinder; 15. Inlet end; 16. Reset code disk; 17. Step loss code disk; 18. Transmission pin; 19. Rotating shaft; 20. Pressure sensor; 21. Thrust bearing; 22. First elastic member; 23. Rotor; 24. Stator; 25. Sealing rubber; 26. Step loss sensor; 27. Zero position sensor; 28. Piston rod; 29. ​​Outlet one-way valve; 30. Inlet one-way valve; 31. Liquid inlet pipe; 32. First pressure relief pipe; 33. Outlet pipe; 34. Inlet pipe; 35. Second pressure relief pipe; 36. Cleaning groove; 37. Arc groove DETAILED DESCRIPTION

[0019] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0020] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0022] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0023] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0025] Example 1 Reference Figure 1 As shown, this embodiment provides a rotary cut valve that can prevent suction and jamming, including a rotary cut valve head 7, a stator 24, a rotor 23, a motor 5 and a cleaning assembly.

[0026] Specifically, refer to Figure 1 and Figure 2 As shown, the rotary cutting valve head 7 is provided with a cleaning inlet flow channel, a cleaning outlet flow channel and several working flow channels. The cleaning inlet flow channel is used to inject the cleaning medium, and the cleaning outlet flow channel is used to discharge the cleaning medium. The cleaning outlet flow channel is provided with a safety valve 8 for controlling the outlet pressure threshold. Several working flow channels are arranged around the rotary cutting valve head 7, and different working flow channels are connected by switching the rotary cutting valve. It should be noted that the cleaning medium can be a gas medium, a liquid medium, or a gas-liquid mixed medium, and can be driven by various methods such as acoustic wave drive, magnetic drive, electric field or ion wind drive, aerosol jet drive, and capillary action drive.

[0027] Specifically, the stator 24 is installed in the rotary cut valve head 7. The stator 24 is provided with a first flow channel connected to the cleaning inlet, a second flow channel connected to the cleaning outlet flow channel, and a sub-flow channel connected one-to-one with the working flow channel. The rotor 23 and the stator 24 rotate in cooperation, and a sealing rubber 25 is provided between the rotor 23 and the stator 24. A cleaning groove 36 is provided in the middle of the rotor 23, and the cleaning groove 36 is connected to the first flow channel and the second flow channel; an arc-shaped groove 37 is provided on the edge of the rotor 23, and the arc-shaped groove 37 connects two adjacent sub-flow channels; and the cleaning groove 36 and the arc-shaped groove 37 are not connected to each other. The cleaning medium injected from the cleaning inlet flow channel enters the cleaning groove 36, cleans the rotary cut valve, and is discharged outward from the cleaning outlet flow channel with wear debris, crystals, etc., and the injected cleaning medium provides reverse pressure for the de-engagement of the rotor 23 and the stator 24, thereby realizing the de-engagement process. Two adjacent sub-flow channels are connected via an arc-shaped groove 37 , and different working flow channels can be switched to be connected by rotating the arc-shaped groove 37 .

[0028] Specifically, refer to Figure 3As shown, the motor 5 is connected to a rotating shaft 19; the rotating shaft 19 is connected to a rotor 23, which is driven by the motor 5 to rotate and perform peeling, switching between different working flow channels. A first elastic member 22 is also connected to the rotating shaft 19. The first elastic member 22 has elastic potential energy that drives the rotor 23 to press against the stator 24. The first elastic member 22 applies pressure to the rotor 23 to ensure a tight seal between the stator 24 and the rotor 23. The first elastic member 22 can specifically be a wave spring. The rotor 23 and stator 24 are both located within the housing. The rotating shaft 19 has a T-shaped structure, so that the first elastic member 22 is sleeved on the rotating shaft 19, with one end connected to the rotating shaft 19 and the other end connected to a thrust bearing 21 mounted on the housing. The rotating shaft 19 is connected to the output shaft of the motor 5 via a transmission pin 18. The outer contour of the rotor 23 is squared, and the rotating shaft 19 is provided with a matching square groove, so that the rotor 23 can be inserted into the square groove and drive-engaged with the rotating shaft 19. The rotary valve seat 6 is also connected to the bottom of the rotary valve head, so that the output shaft of the motor 5 and the rotating shaft 19 are located in the valve seat.

[0029] Specifically, a lost-step detection mechanism is provided on the motor 5 to detect whether the motor 5 is in a lost-step state. The lost-step detection mechanism includes a reset encoder 16, a lost-step encoder 17, a zero position sensor 27, and a lost-step sensor 26. The mechanism determines whether the motor 5 is in a lost-step state by detecting the reset encoder 16 and the lost-step encoder 17, respectively. The specific detection method and installation method can adopt existing technologies.

[0030] Specifically, the cleaning component is connected to the cleaning inlet flow channel and is used to inject a cleaning medium into the cleaning inlet flow channel. The cleaning medium is injected through the cleaning component to clean the wear debris and crystals, and the reverse force applied to the rotor 23 for de-attraction is controlled. The planar van der Waals force between the friction surfaces of the rotor 23 and the stator 24 is related to the contact area and the effective spacing. By setting the cleaning groove 36, the contact area can be reduced. By injecting a cleaning medium with a certain pressure, a force can be applied between the stator 24 and the rotor 23 to make them move away from each other, thereby increasing the effective spacing at the microscopic level; reducing the contact area and increasing the effective spacing can reduce the planar van der Waals force, thereby making it easier for the rotor 23 and the stator 24 to de-attract.

[0031] The present invention provides a rotary cutting valve that prevents engagement and jamming. By providing a cleaning groove 36 on the rotor 23, on the one hand, it reduces the contact area between the stator 24 and the rotor 23, thereby reducing the vacuum adsorption pressure between the stator 24 and the rotor 23, thereby reducing the rotary cutting torque after engagement and reducing the reverse pressure required for de-engagement; on the other hand, during the friction between the stator 24 and the rotor 23, powder and crystals will move toward the hollow cleaning groove 36, and the powder and crystals will be taken away by the cleaning medium to achieve the purpose of cleaning, thereby ensuring that the rotary cutting valve can be started normally and avoiding damage to the rotary cutting valve caused by wear chips and crystals.

[0032] Specifically, continue to refer to Figure 1 As shown, the cleaning assembly includes a pressure storage tank 12 and a pressure storage device. One end of the pressure storage tank 12 is connected to the cleaning inlet flow channel through a back pressure valve 10; the pressure storage device is connected to the pressure storage tank 12 and is used to inject cleaning medium into the pressure storage tank 12 and store pressure.

[0033] Specifically, continue to refer to Figure 3 As shown, the pressure accumulator device comprises a cam mechanism 3, a push rod 4, a piston cylinder 14, a piston rod 28, and a second elastic member. The cam mechanism 3 is in transmission connection with a motor 5, a dual-axis stepper motor 5, which synchronously drives the cam mechanism 3 and the rotating shaft 19. In this embodiment, the cam mechanism 3 can employ a conventional cam structure known in the art, and therefore will not be described in detail. The push rod 4 is mounted within the housing for movement along its axis; it abuts against the cam mechanism 3, so that rotation of the cam mechanism 3 drives the push rod 4 along its axis. The piston cylinder 14 is provided with a piston channel inside, and the piston cylinder 14 is connected to an inlet check valve 30 and an outlet check valve 29; the inlet end 15 of the piston channel is connected to the cleaning medium storage tank through the inlet check valve 30, and the outlet end 13 is connected to the pressure storage tank 12 through the outlet check valve 29; wherein the inlet check valve 30 only allows the cleaning medium to enter the piston cylinder 14 from the cleaning medium storage tank, and the outlet check valve 29 only allows the cleaning medium to enter the pressure storage tank 12 from the piston cylinder 14. The piston rod 28 is movably connected to the piston channel and is connected to the push rod 4; the second elastic member has elastic potential energy that drives the push rod 4 to move away from the piston cylinder 14. During the operation of the rotary cutting valve, the motor 5 rotates to drive the rotor 23 to rotate, while also driving the cam mechanism 3 to rotate. Specifically, the inlet check valve 30 is connected to the cleaning medium storage tank through the liquid inlet pipe 31.

[0034] When the cam mechanism 3 rotates to its larger end and contacts the push rod 4, the push rod 4 is driven to drive the piston rod 28 to move in the direction of inserting into the piston cylinder 14. At this time, the inlet one-way valve 30 is closed and the outlet one-way valve 29 is opened, allowing the cleaning medium to enter the pressure storage tank 12 from the piston cylinder 14, thereby increasing the pressure of the pressure storage tank 12. When the cam mechanism 3 rotates to its smaller end and contacts the push rod 4, the second elastic member drives the push rod 4 to mobilize the piston rod 28 to move in the direction of exiting the piston cylinder 14, i.e., in the reverse direction. At this time, the inlet one-way valve 30 is opened and the outlet one-way valve 29 is closed, allowing the cleaning medium to enter the piston cylinder 14 from the cleaning medium storage tank.

[0035] Specifically, refer to Figure 4As shown, a three-way switching valve 9 is installed between the back-pressure valve 10 and the cleaning inlet flow channel. One end of the three-way switching valve 9 is connected to the back-pressure valve 10 via an outlet pipe 33, one end is connected to the cleaning inlet flow channel via an inlet pipe 34, and one end is connected to the atmosphere via a first pressure relief pipe 32. The safety valve 8 is connected to a second pressure relief pipe 35. When step loss correction, de-energizing, or cleaning is required, the three-way switching valve 9 is switched to connect the back-pressure valve 10 to the cleaning inlet flow channel. When the rotary cutting valve is operating normally, the three-way switching valve 9 is switched to connect the back-pressure valve 10 to the atmosphere.

[0036] Specifically, continue to refer to Figure 1 As shown, the swallowing wheel mechanism is also connected to a circle counting disc 1, and the housing is also connected to a counting sensor 2. The counting sensor 2 detects the circle counting disc 1 to determine the number of rotations of the cam mechanism 3, thereby determining the number of pressurization times of the pressure storage tank 12.

[0037] Specifically, a pressure sensor 20 is provided at one end of the first elastic member 22 away from the rotor 23 , and is specifically disposed between the thrust bearing 21 and the housing, for monitoring the pressure applied by the first elastic member 22 .

[0038] Specifically, it also includes a controller 11, which is connected to the safety valve 8, the back pressure valve 10, the pressure sensor 20, etc., for receiving the detection results of the pressure sensor 20 and controlling the thresholds of the safety valve 8 and the back pressure valve 10.

[0039] Example 2 Reference Figure 5 As shown, this embodiment provides a control method for the rotary cutting valve in Example 1, which specifically includes the following steps: S1, determine whether the rotary cutting valve is in a long-term state; S2. If the rotary cut valve is in the long-term idle state, continue to determine whether the motor 5 is in the lost step state; if the motor 5 is in the lost step state, perform the lost step correction on the motor 5; if the motor 5 is in the non-lost step state, further determine whether the rotary cut valve is in the idle state; S3. If the rotary cut valve is not in a long-term idle state, further determine whether the rotary cut valve is in an idle state; S4. If the rotary cut valve is in an idle state, perform a de-energizing process; S5. If the rotary cutting valve is not in an idle state, clean it.

[0040] The present embodiment provides a control method for using a rotary cutting valve. When the rotary cutting valve is in a state of long-term storage, idleness, or step loss, the cleaning pressure can be adjusted according to the pressure of the elastic part, thereby performing de-engagement, step loss correction and other processing to ensure that the rotary cutting valve can be started normally, avoid foreign matter from entering the friction surface as much as possible, and avoid the rotary cutting valve from getting stuck. Unmanned operation can be achieved, which greatly reduces the workload of medical equipment maintenance operators and improves work efficiency.

[0041] Specifically, in step S1, it is determined whether the rotary cutting valve is in a long-term state. The determination can be made based on whether the rotary cutting valve is started for the first time after power-on. If it is the first time after power-on, it is in a long-term state; if it is not the first time after power-on, it is not in a long-term state.

[0042] Specifically, in step S3, it is determined whether the rotary cutting valve is in an idle state. The determination can be made based on the preset value of the idle time of the rotary cutting valve. In this embodiment, the preset value of the time limit is 2 hours. When the idle time of the rotary cutting valve reaches 2 hours, it is determined that the rotary cutting valve is in an idle state. When the idle time of the rotary cutting valve does not reach 2 hours, it is determined that the rotary cutting valve is not in an idle state.

[0043] Specifically, in step S2, the process of step loss correction includes: S21, connecting the cleaning inlet flow channel to the cleaning assembly, and injecting a cleaning medium into the cleaning inlet flow channel through the cleaning assembly; S22, presetting the anti-sucking reverse pressure value to P, where P=50%*M, where M is the pressure value of the first elastic member 22 detected by the pressure sensor 20; S23, setting the threshold of the safety valve 8 to P, gradually increasing the pressure of the cleaning inlet flow channel, that is, gradually increasing the pressure of the back pressure valve 10, until the pressure value of the safety valve 8 reaches the threshold P; S24, start the motor 5 and release the pressure of the safety valve 8, and then determine whether there is a step loss again; S25. If the step is still lost, increase the anti-pull-in reverse pressure value by 10%*M each time and repeat the step loss correction.

[0044] In step S24, the controller 11 is used to set the motor 5 to start at low speed and high current. At this time, the torque is relatively large, so as to achieve the purpose of assisting the disengagement from standstill to start-up. Specifically, the driving current value of the motor 5 can be set to the rated current * 100%, and the maximum speed value can be set to * 5%.

[0045] Specifically, in step S4, the desorption process includes: S41, connecting the cleaning inlet flow channel to the cleaning assembly, and injecting a cleaning medium into the cleaning inlet flow channel through the cleaning assembly; S42, setting the threshold of the safety valve 8 to P, where P=50%*M, where M is the pressure value of the first elastic member 22 detected by the pressure sensor 20; S43 , setting the threshold of the safety valve 8 to P, gradually increasing the pressure of the cleaning inlet flow channel, that is, gradually increasing the pressure of the back pressure valve 10 until the pressure value of the safety valve 8 reaches the threshold P.

[0046] Specifically, in step S5, the cleaning process includes: S51, connecting the cleaning inlet flow channel to the cleaning assembly, and injecting a cleaning medium into the cleaning inlet flow channel through the cleaning assembly; S52, set the maximum cleaning pressure to Q, Q = (2 * EM) * 90%, E is the pressure value of the first elastic member 22 preset when the rotary cutting valve leaves the factory; S53. Adjust the back pressure valve 10 threshold to Q, and adjust the safety valve 8 threshold to M*40%.

[0047] The user can set whether to enable cleaning mode. Before entering the cleaning process, the system will first determine whether cleaning mode is enabled based on the user's setting. If the user sets cleaning mode to be enabled, the system will enter cleaning mode. If the user sets cleaning mode to be disabled, the system will directly enter normal working mode.

[0048] In normal working mode, the cleaning component enters the pressure storage mode, switches the three-way valve to the first pressure relief pipe 32, connects the back pressure valve 10 to the atmospheric pressure, and the pressure storage device increases the pressure in the pressure storage tank 12 according to the rotation of the motor 5, and sets the threshold of the safety valve 8 to the pressure value of the pressure sensor 20 * 40; the pressure storage tank 12 stores the pressure for the next use.

[0049] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A rotary cutting valve that prevents suction and jamming, characterized in that: include: The rotary cutting valve head is provided with a cleaning inlet flow channel, a cleaning outlet flow channel and a working flow channel; a plurality of working flow channels are arranged around the rotary cutting valve head; the cleaning outlet flow channel is connected to a safety valve; The stator is installed in the rotary cutting valve head; the stator is provided with a first flow channel connected to the cleaning inlet, a second flow channel connected to the cleaning outlet flow channel, and a sub-flow channel connected to the working flow channel in a one-to-one correspondence; The rotor is rotatably engaged with the stator; a cleaning groove is provided in the middle of the rotor, the cleaning groove is connected to the first flow channel and the second flow channel; an arc-shaped groove is provided on the edge of the rotor, the arc-shaped groove is connected to two adjacent sub-flow channels; and the cleaning groove and the arc-shaped groove are not connected to each other; A motor connected to a rotating shaft; the rotating shaft is connected to the rotor, and a first elastic member is connected to the rotating shaft, wherein the first elastic member has elastic potential energy for driving the rotor to press against the stator; The cleaning component is communicated with the cleaning inlet flow channel and is used for injecting cleaning medium into the cleaning inlet flow channel.

2. The anti-sucking and jamming rotary cutting valve according to claim 1, characterized in that: The cleaning component comprises: The pressure storage tank is connected to the cleaning inlet flow channel through a back pressure valve; The pressure storage device is connected to the pressure storage tank and is used to inject cleaning medium into the pressure storage tank and store pressure in the pressure storage tank.

3. The anti-sucking and jamming rotary cutting valve according to claim 2, characterized in that: The pressure storage device comprises: The cam mechanism is connected to the motor in a transmission manner; the motor is a dual-axis stepping motor that synchronously drives the cam mechanism and the rotating shaft to rotate; A push rod is installed in the housing so as to be movable along the axis direction; the push rod abuts against the cam mechanism, so that when the cam mechanism rotates, the push rod is driven to move along the axis direction; A piston cylinder having a piston passage therein; the piston cylinder is connected to an inlet one-way valve and an outlet one-way valve; the piston passage is connected to the cleaning medium storage tank through the inlet one-way valve and is connected to the pressure storage tank through the outlet one-way valve; The piston rod is movably connected in the piston channel and is connected to the push rod.

4. The anti-sucking and jamming rotary cutting valve according to claim 3, characterized in that: The push rod is connected to a second elastic member, and the second elastic member has elastic member potential energy for driving the push rod to move away from the piston cylinder.

5. The anti-sucking and jamming rotary cutting valve according to claim 2, characterized in that: A three-way switching valve is provided between the back pressure valve and the cleaning inlet flow channel; one end of the three-way switching valve is connected to the back pressure valve, one end is connected to the cleaning inlet flow channel, and one end is connected to the atmosphere.

6. The anti-sucking and jamming rotary cutting valve according to claim 1, characterized in that: A pressure sensor is provided at one end of the first elastic member away from the rotor.

7. A control method using the rotary cutting valve according to any one of claims 1 to 6, characterized in that: The steps include: Determine whether the rotary cutting valve is in a long-term storage state; If the rotary cut valve is in a long-term idle state, it is further determined whether the motor is in a step-lost state; if the motor is in a step-lost state, the motor is corrected for step-lost; if the motor is in a non-step-lost state, it is further determined whether the rotary cut valve is in an idle state; If the rotary cut valve is not in a long-term idle state, further determine whether the rotary cut valve is in an idle state; If the rotary cut valve is in an idle state, it should be deactivated and closed; If the rotary cutting valve is not in an idle state, clean it.

8. The control method of the rotary cutting valve according to claim 7, characterized in that: The process of the lost step correction includes: Connecting the cleaning inlet flow channel to the cleaning assembly, and injecting cleaning medium into the cleaning inlet flow channel through the cleaning assembly; The anti-sucking reverse pressure value is preset to P, P=50%*M, M is the pressure value of the first elastic member detected by the pressure sensor; Set the threshold of the safety valve to P, and gradually increase the pressure of the cleaning inlet flow channel until the pressure value of the safety valve reaches the threshold P; Start the motor and release the pressure of the safety valve, then check again whether there is any step loss; If the step is still lost, increase the anti-pull-in reverse pressure value by 10%*M each time and repeat the step loss correction.

9. The control method of the rotary cutting valve according to claim 7, characterized in that: The desorption process includes: Connecting the cleaning inlet flow channel to the cleaning assembly, and injecting cleaning medium into the cleaning inlet flow channel through the cleaning assembly; The anti-sucking reverse pressure value is preset to P, P=50%*M, M is the pressure value of the first elastic member detected by the pressure sensor; Set the threshold of the safety valve to P, and gradually increase the pressure of the cleaning inlet flow channel until the pressure value of the safety valve reaches the threshold P.

10. The control method of the rotary cutting valve according to claim 7, characterized in that: The cleaning process includes: Connecting the cleaning inlet flow channel to the cleaning assembly, and injecting cleaning medium into the cleaning inlet flow channel through the cleaning assembly; Set the maximum cleaning pressure to Q, Q = (2 * EM) * 90%, E is the factory preset pressure value of the first elastic member; Adjust the cleaning inlet flow channel pressure threshold to Q and the safety valve threshold to M*40%.

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