Manual and electric double-control three-way valve

Abstract

The invention discloses a manual and electric double-control three-way valve, which comprises a valve core (1), a manual controller (2) and an electric controller (3), the valve core (1) comprises a front cover (102) and a rear cover (103), a cam (101) is arranged between the front cover (102) and the rear cover (103), the cam (101) is respectively connected with the manual controller (2) and the electric controller (3), and the cam (101) is controlled to rotate by the manual controller (2) or the electric controller (3). And the first hose (4) and the second hose (5) are disconnected or connected in cooperation with a limiting point, so that the state of the three-way pipe (6) is controlled. The manual control and the electric control can be realized, and in the electric control state, the system only needs to do work when the state of the valve is switched, so that the power consumption is relatively low.

Description

Technical Field

[0001] The invention relates to the technical field of three-way valves, and in particular to a manual and electric dual-control three-way valve. Background Art

[0002] Ordinary valve fluids need to flow through the valve core, which is insufficient in application scenarios where corrosive fluids pass through or where the valves have biocompatibility and biosafety requirements.

[0003] In the field of fluid, there is an electromagnetic pinch valve, which drives an electric push rod through an electromagnetic solenoid, and controls opening and closing by squeezing or loosening a hose. The medium only passes through the hose, and other parts in the valve body will not contact the medium, and there is no cross contamination. However, in this solution, the valve core works in a monostable state, that is, it can only be normally open or normally closed. When it is in a non-steady state, it requires a large maintenance power, which is accompanied by heat, reduced life and higher energy consumption.

[0004] Due to its monostable characteristics, the pinch valve cannot be directly used to construct a three-way valve. It is necessary to use multiple valves in parallel and add more joints to realize the function of the three-way valve, which is not only more expensive but also requires more consumables.

[0005] The current electromagnetic pinch valve structure can only be controlled electrically. In some application fields, in order to improve the redundancy of the system, the valve needs to be controlled manually and electrically at the same time. However, since the existing electromagnetic pinch valve structure is monostable, it cannot meet this requirement. Summary of the invention

[0006] The purpose of the present invention is to provide a manual and electric double-control three-way valve to solve the problem that the electromagnetic pinch valve can only work in a monostable state, has high power consumption when working in an unstable state, and cannot be manually controlled.

[0007] The present invention is implemented by adopting the following technical scheme: a manual and electric double-control three-way valve, including a valve core, a manual controller and an electric controller, the valve core includes a front cover and a rear cover, a cam is arranged between the front cover and the rear cover, the cam is respectively connected to the manual controller and the electric controller, the rotation of the cam is controlled by the manual controller or the electric controller, and the first hose and the second hose are cut off or connected in cooperation with the limit point, thereby controlling the state of the three-way pipe.

[0008] Furthermore, a first concave-convex matching structure and a first rotating guide groove structure are provided on the cam, the first concave-convex matching structure is connected to the manual controller, the first rotating guide groove structure is connected to the manual controller, and a front cover bearing is also provided between the cam and the front cover.

[0009] Furthermore, a second concave-convex matching structure and a second rotating guide groove structure are also provided on the cam, the second concave-convex matching structure is connected to the electric controller, the second rotating guide groove structure is connected to the back cover, an elliptical arc structure of the compression pipeline is provided on the front outer edge of the cam, and a screw hole is provided in the middle of the cam, and the screw hole extends to the second concave-convex matching structure connected to the electric controller.

[0010] Furthermore, a limiting mechanism is also provided on the cam, and the limiting mechanism includes a first rotation limiting structure and a second rotation limiting structure, the first rotation limiting structure and the second rotation limiting structure are limited by the front cover, and the limiting position forms a first limiting point and a second limiting point, and a first shaft body structure connected to the front cover bearing and a first stepped shaft structure for limiting the outer ring of the front cover bearing are provided on the upper part of the cam, and a second shaft body structure connected to the rear cover bearing and a second stepped shaft structure for limiting the outer ring of the front cover bearing are provided on the lower part of the cam.

[0011] Furthermore, a first guide groove structure and a second guide groove structure are provided on the front cover, and the first guide groove structure and the second guide groove structure are connected to the manual controller and the cam respectively.

[0012] Furthermore, the front cover is also provided with a groove mechanism, and the groove mechanism includes a first groove and a second groove which are perpendicular or parallel to each other, and the first groove and the second groove are used for placing the first hose and the second hose respectively.

[0013] Furthermore, a third guide groove structure and a fixing piece are provided on the rear cover, and the third guide groove structure and the fixing piece are connected to the cam and the electric controller respectively.

[0014] Furthermore, the rear cover and the front cover are connected via a connecting structure.

[0015] Furthermore, the manual controller is directly fixed to the rotating first guide groove structure of the front cover through a snap-fit ​​structure, and is connected to the first concave-convex matching structure on the cam through a concave-convex matching piece.

[0016] Furthermore, the electric controller is controlled by a closed-loop motor or an open-loop motor plus state sensing.

[0017] The beneficial effects of the present invention are: The present invention connects the manual switch at the front and the electric switch at the rear through a cam, and two limit points are arranged on the valve structure, which can limit the moving position of the cam, wherein the first limit point is a hose-one cut-off limit point, and the first hose is cut off when the cam moves to the limit point, and the limit point is a steady-state limit point, and the second limit point is a second hose-one cut-off limit point, and the second hose is cut off when the cam moves to the limit point, and the limit point is a steady-state limit point. At the same time, there is a virtual limit point in the middle of the above two limit points, and the virtual limit point has no actual limit measures. The cam can stop at the limit point by measuring and controlling. When the cam stops at this point, the cam does not contact the hose, and the first hose and the second hose are both conductive.

[0018] The present invention can be controlled both manually and electrically, and in the electrically controlled state, the system needs to do work only when the valve switches states, so the power consumption is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 This is an exploded view of Example 1 of the present invention; Figure 3 Cam structure diagram Figure 1 ; Figure 4 Cam structure diagram Figure 2 ; Figure 5 This is a front view of the front cover of Example 1 of the present invention; Figure 6 This is a rear view of the front cover of Embodiment 1 of the present invention; Figure 7 This is a front view of the back cover of Example 1 of the present invention; Figure 8 This is a rear view of the rear cover of Embodiment 1 of the present invention; Fig. 9 Manual controller structure diagram Figure 1 ; Fig.10 Manual controller structure diagram Figure 2 ; Fig.11 The cross section of the valve core of Example 1 of the present invention Figure 1 ; Fig.12 The cross section of the valve core of Example 1 of the present invention Figure 2 ; Fig.13 The cross section of the valve core of Example 1 of the present invention Figure 3 ; Fig.14 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Fig.15 This is an exploded view of Embodiment 2 of the present invention; Fig.16 This is a front view of the front cover of embodiment 2 of the present invention; Fig.17 This is a rear view of the front cover of embodiment 2 of the present invention; Fig.18 The cross section of the valve core of Example 2 of the present invention Figure 1 ; Fig.19 The cross section of the valve core of Example 2 of the present invention Figure 2 ; Fig. 20 It is the block diagram of closed-loop control system; Fig.21 It is the block diagram of open loop control system; In the figure, 1-valve core, 101-cam, 1011-first concave-convex matching structure, 1012-first rotation guide groove structure, 1013-first rotation limiting structure, 1014-second rotation limiting structure, 1015-screw hole, 1016-second rotation guide groove structure, 1017-elliptical arc structure, 1018-first groove, 1019-second groove, 10110-first shaft structure, 10111-second shaft structure, 10112-first stepped shaft structure, 10113-second stepped shaft structure, 10114-second concave-convex matching structure, 102-front cover, 1021-first guide groove structure, 1022-groove structure , 1023--second guide groove structure, 1024-first limiting structure, 1025-second limiting structure, 1026-fixing structure, 1027-front cover casing fixing structure, 103-rear cover, 1031-third guide groove structure, 1032-fixing piece, 1033-connecting structure, 1034-rear cover casing fixing structure, 1035-fourth guide groove structure, 104-front cover bearing, 1041-first limiting point, 1042-second limiting point, 105-rear cover bearing, 2-manual controller, 2001-buckle structure, 2002-concave and convex fittings, 3-electric controller, 4-first hose, 5-second hose, 6-tee pipe. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0024] Example 1: See Figure 1 , a manual and electric double-control three-way valve, comprising a valve core 1, a manual controller 2 and an electric controller 3, see Figure 2 The valve core 1 includes a cam 101 , a front cover 102 , a rear cover 103 , a front cover bearing 104 and a rear cover bearing 105 .

[0025] See also Figure 3 and Figure 4 The front center of the cam 101 has a first concave-convex matching structure 1011 connected to the manual controller 2. A first rotation guide groove structure 1012 connected to the manual controller 2 is arranged in the first concave-convex matching structure 1011 at the front of the cam 101. The first rotation guide groove structure 1012 is a threaded structure. The cam 101 body has a first rotation limiting structure 1013 and a second rotation limiting structure 1014 limited by the front cover 102 structure. Furthermore, the rear center of the cam 101 has a second concave-convex matching structure 10114 connected to the electric controller 3, the rear outer edge of the cam 101 has a second rotating guide groove structure 1016 that matches the rear cover 103, the front outer edge of the cam 101 has an elliptical arc structure 1017 for compressing the pipeline, and the middle of the cam 101 has a screw hole 1015 that extends to the second concave-convex matching structure 10114 connected to the electric controller 3 for further fixing the electric controller 3. The upper part of the cam 101 has a first shaft structure 10110 connected to the front cover bearing 104, a first stepped shaft structure 10112 that limits the outer ring of the front cover shaft 104, and the lower part of the cam 101 has a second shaft structure 10111 connected to the rear cover bearing 105, and a second stepped shaft structure 10113 that limits the outer ring of the front cover bearing 104.

[0026] See also Figure 5 and Figure 6The front part of the front cover 102 has a first guide groove structure 1021 which is connected to the manual controller 2 and allows the manual controller 2 to rotate and limit the outer ring position of the front cover bearing 104. The front cover 102 has a groove structure 1022 on each of the opposite sides for placing and fixing the hose, including a first groove and a second groove. This structure can limit the first hose 4 and the second hose 5 along the insertion direction. The axial limitation of the first hose 4 and the second hose 5 is separately confirmed by the use structure. Furthermore, the rear part of the front cover 102 has a second guide groove structure 1023 for cooperating with the rotation of the cam 101, and the second guide groove structure 1023 is arranged in the middle position of one side of the front cover 102; the rear part of the front cover 102 also has a first limiting structure 1024 and a second limiting structure 1025 for limiting the cam, and the first limiting structure 1024 and the second limiting structure 1025 are respectively arranged on two opposite sides of the front cover 102, and the rear part of the front cover 102 also has a fixing structure 1026 for fixing to the rear cover 103, and the rear part of the front cover 102 also has a front cover and casing fixing structure 1027 fixed to the casing.

[0027] See also Figure 7 and Figure 8 The rear cover 103 has a third guide groove structure 1031 that cooperates with the rear part of the cam 101 and installs the rear cover bearing 105. The rear cover 103 has a fixing part 1032 with the electric controller 3. The rear cover 103 also has a connecting structure 1033 with the front cover. The rear cover 103 also has a rear cover casing fixing structure 1034 fixed to the casing. The rear cover 103 has a fourth guide groove structure 1035 for installing the rear cover bearing 105 and limiting the outer ring of the rear cover bearing 105.

[0028] It is conceivable that the mounting structure of the device may be designed according to a specific application and may be present on the front cover 102 , the rear cover 103 or the electric controller 3 .

[0029] See also Fig. 9 and Fig.10 The manual controller 2 can be directly fixed on the first concave-convex matching structure 1011 of the cam 101 through the buckle structure 2001, and is connected to the first concave-convex matching structure 1011 on the cam 101 through the concave-convex matching piece 2002.

[0030] The electric controller 3 can use a closed-loop stepper motor or a closed-loop servo motor in a closed-loop state, and can use an open-loop stepper motor or a DC motor in an open-loop state. Since this application is a low-speed and high-torque application, a reduction device can be provided on the electric controller to enhance the torque.

[0031] See also Fig.11 , Fig.12 and Fig.13When the three-way valve rotates to one side, the cam 101 rotates to the first limit point 1041. At this time, the cam 101 and the first hose 4 are not connected. At the same time, the cam 101 squeezes and cuts off the second hose 5. At this time, the three-way pipe 6 is in a single-side conduction state. The cam 101 is limited by the second guide groove structure 1023. Since after reaching the limit point, the cam 101 is only subjected to the pressure from the second hose 5, the pressure acts on the center of the cam 101 and does not affect the state of the cam 101, so this is a stable state. When the three-way valve turns to the other side, the cam 101 rotates to the second limit point 1042. At this time, the cam 101 and the second hose 5 are not connected. At the same time, the cam 101 squeezes and cuts off the first hose 4. At this time, the three-way pipe 6 is in a single-side conduction state. Since after reaching the limit point, the cam 101 is only subjected to the pressure from the first hose 4, the pressure acts on the center of the cam 101 and does not affect the state of the cam 101, so this is a stable state. When the cam 101 is centered, the cam 101 is not connected to the first hose 4 or the second hose 5 , and the three-way pipe 6 is in a fully open state.

[0032] Example 2: See Figures 14 to 19 , a manual and electric double-control three-way valve, comprising a valve core 1, a manual controller 2 and an electric controller 3, see Figure 2 The valve core 1 includes a cam 101 , a front cover 102 , a rear cover 103 , a front cover bearing 104 and a rear cover bearing 105 .

[0033] The difference from Example 1 is that there is a groove structure 1022 for placing and fixing the hose on each of the two adjacent sides of the front cover 101, including a first groove and a second groove. The structure can limit the first hose 4 and the second hose 5 along the insertion direction. The axial limit of the first hose 4 and the second hose 5 is confirmed separately by the use structure. The rear of the front cover 102 has a second guide groove structure 1023 that cooperates with the rotation of the cam 101, and the second guide groove structure 1023 is set at a corner of the front cover 102; the rear of the front cover 102 also has a first limiting structure 1024 and a second limiting structure 1025 for limiting the cam, and the first limiting structure 1024 and the second limiting structure 1025 are respectively set on the two adjacent sides of the front cover 102, and the rear of the front cover 102 also has a fixing structure 1026 for fixing with the rear cover 103. When the three-way valve rotates to one side, the cam 101 rotates to the first limit point 1041, at which time the cam 101 and the first hose 4 are not connected, and the cam 101 squeezes and cuts off the second hose 5, and the three-way pipe 6 is in a single-side conduction state. The cam 101 is limited by the second guide groove structure 1023. Since the cam 101 is only subjected to the pressure from the second hose 5 after reaching the limit point, the pressure acts on the center of the cam 101 and does not affect the state of the cam 101, so it is a stable state at this time. When the three-way valve turns to the other side, the cam 101 rotates to the second limit point 1042, at which time the cam 101 and the second hose 5 are not connected, and the cam 101 squeezes and cuts off the first hose 4, and the three-way pipe 6 is in a single-side conduction state. Since the cam 101 is only subjected to the pressure from the first hose 4 after reaching the limit point, the pressure acts on the center of the cam 101 and does not affect the state of the cam 101, so it is a stable state at this time. When the cam 101 is centered, the cam 101 is not connected to the first hose 4 or the second hose 5 , and the three-way pipe 6 is in a fully open state.

[0034] Since the structures of the front cover 101 in the first embodiment and the second embodiment are different, they can adapt to different tees 6 in practical applications. For example, the first embodiment is applicable to a Y-shaped tee, and the second embodiment is applicable to a T-shaped tee.

[0035] See also Fig. 20When working in a closed-loop state, the electric controller 3 should include a motor, a motor driver, an encoder, and a main controller. Since the state of the motor and the position of the cam may not be recognized after power failure, the position of the cam needs to be calibrated without installing the hose each time the power is turned on. The calibration method is to control the motor driver through the main controller to control the motor rotation to drive the cam to rotate, and read the encoder value in real time. When the motor is running but the encoder value does not change, the system believes that the limit point has been touched, and records the encoder value at this time, and runs the motor in the reverse direction to touch another limit point. At this time, the position information of the two limit points has been recorded in the main controller. Whether it is manual control or electric control, due to the existence of the encoder, the real-time position of the cam can be mapped in the main controller. When electric control is required, it is only necessary to control the motor operation according to the distance between the position and the target position.

[0036] For further information, see Fig.21 If the electric controller 3 works in the open-loop mode, it is necessary to install a state sensor on the front cover 102 and the rear cover 103. The state sensing method includes a photoelectric detector, a magnetic detector or a switch-type detector. When using a magnetic detector (Hall sensor), it is necessary to Figure 3 , Figure 4 As shown, a first groove 1018 and a second groove 1019 are provided on the cam 101, and magnets are embedded in the grooves. When other detectors are used, the front cover 102 and the rear cover 103 also need to be adjusted accordingly.

[0037] The present invention connects the manual switch (manual controller) at the front and the electric switch (electric controller) at the rear through a cam, and two limit points are also arranged on the three-way valve structure to limit the moving position of the cam 101, wherein the first limit point 1041 is the cut-off limit point of the first hose 4, and when the cam 101 moves to the limit point, the first hose 4 is cut off, and the limit point is a steady-state limit point. The second limit point 1042 is the cut-off limit point of the second hose 5, and when the cam 101 moves to the limit point, the second hose 5 is cut off, and the limit point is a steady-state limit point. At the same time, there is a virtual limit point in the middle of the above two limit points, and the virtual limit point has no actual limit measures. The cam 101 can stop at the limit point by measuring and controlling. When the cam 101 stops at this point, the cam does not contact the hose, and the first hose 4 and the second hose 5 are both conductive. And because the two limit points of the present invention are both steady-state limit points, a combination of electric and manual control can be achieved, and in the electric control state, the system only needs to do work when the valve changes state. At the same time, the front cover and the rear cover are both equipped with bearings, which reduces the wear of the structure during operation and improves the stability during operation.

[0038] In addition, the present invention can use a closed-loop motor for direct control. When powered on, the motor is controlled to rotate so that the cam touches two limit points, and the position of the limit points is obtained and memorized. In subsequent use, it is only necessary to control the closed-loop motor to move to the limit points to realize the electric control function. It can also be controlled by an open-loop motor plus state sensing method. The state sensing method includes common methods such as photoelectric detectors, magnetic detectors, or switch-type detectors. When the state sensing confirms that the cam touches the limit point, the open-loop motor is stopped.

[0039] For the aforementioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the order of the actions described, because according to the present application, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily required by the present application.

[0040] The above embodiments describe the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the changes and modifications made by those skilled in the art shall be within the scope of protection of the appended claims of the present invention without departing from the spirit and scope of the present invention.

Claims

1. A manual and electric double-control three-way valve, characterized in that: The invention comprises a valve core (1), a manual controller (2) and an electric controller (3), wherein the valve core (1) comprises a front cover (102) and a rear cover (103), a cam (101) is arranged between the front cover (102) and the rear cover (103), and the cam (101) is connected to the manual controller (2) and the electric controller (3) respectively. The cam (101) is controlled to rotate by the manual controller (2) or the electric controller (3), and cooperates with a limit point to realize the cut-off or conduction of a first hose (4) and a second hose (5), thereby controlling the state of a three-way pipe (6).

2. A manual and electric double-control three-way valve as claimed in claim 1, characterized in that: The cam (101) is provided with a first concave-convex matching structure (1011) and a first rotating guide groove structure (1012); the first concave-convex matching structure (1011) is connected to the manual controller (2); the first rotating guide groove structure (1012) is connected to the manual controller (2); and a front cover bearing (104) is also provided between the cam (101) and the front cover (102).

3. A manual and electric double-control three-way valve as claimed in claim 2, characterized in that: The cam (101) is also provided with a second concave-convex matching structure (10114) and a second rotating guide groove structure (1016); the second concave-convex matching structure (10114) is connected to the electric controller (3); the second rotating guide groove structure (1016) is connected to the back cover (103); an elliptical arc structure (1017) for compressing the pipeline is provided at the front outer edge of the cam (101); a screw hole (1015) is provided in the middle of the cam (101); the screw hole (1015) extends to the second concave-convex matching structure (10114) connected to the electric controller (3).

4. A manual and electric double-control three-way valve as claimed in claim 3, characterized in that: The cam (101) is also provided with a limiting mechanism, the limiting mechanism comprising a first rotation limiting structure (1013) and a second rotation limiting structure (1014), the first rotation limiting structure (1013) and the second rotation limiting structure (1014) being limited by the front cover (102), and a first limiting point (1041) and a second limiting point (1042) are formed at the limiting position, the upper part of the cam (101) is provided with a first shaft structure (10110) connected to the front cover bearing (104), and a first stepped shaft structure (10112) limiting the outer ring of the front cover bearing (104), the lower part of the cam (101) is provided with a second shaft structure (10111) connected to the rear cover bearing (105), and a second stepped shaft structure (10113) limiting the outer ring of the front cover bearing (105).

5. A manual and electric double-control three-way valve as claimed in claim 4, characterized in that: A first guide groove structure (1021) and a second guide groove structure (1023) are provided on the front cover (102); the first guide groove structure (1021) and the second guide groove structure (1023) are connected to the manual controller (2) and the cam (101) respectively.

6. A manual and electric double-control three-way valve as claimed in claim 5, characterized in that: The front cover (102) is also provided with a groove mechanism (1022), the groove mechanism (1022) comprising a first groove and a second groove which are perpendicular or parallel to each other, the first groove and the second groove being used to place the first hose (4) and the second hose (5) respectively.

7. A manual and electric double-control three-way valve as claimed in claim 6, characterized in that: A third guide groove structure (1031) and a fixing member (1032) are provided on the rear cover (103); the third guide groove structure (1031) and the fixing member (1032) are respectively connected to the cam (101) and the electric controller (3).

8. A manual and electric double-control three-way valve as claimed in claim 7, characterized in that: The rear cover (103) and the front cover (102) are connected via a connection structure (1033).

9. A manual and electric double-control three-way valve as claimed in claim 8, characterized in that: The manual controller (2) is directly fixed to the rotating first guide groove structure (1021) of the front cover (102) via a buckle structure (2001), and is connected to the first concave-convex matching structure (1011) on the cam (101) via a concave-convex matching piece (2002).

10. A manual and electric double-control three-way valve as claimed in claim 9, characterized in that: The electric controller (3) is controlled by a closed-loop motor or an open-loop motor plus state sensing.

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