External control positioning device based on electric control reversing multi-way valve

Abstract

The present invention discloses an external control positioning device based on an electrically controlled reversing multi-way valve, the device comprising a transmission unit synchronously linked with the main valve core of the electrically controlled reversing multi-way valve, and a control positioning unit for locking the transmission unit. When the device is powered on, the multi-way valve is controlled by an electrical signal in an electrical control mode, and when the power is off, the device is switched to a working mode in which the multi-way valve is controlled by an external position control positioning device, and in this working mode, the multi-way valve can achieve a constant output of any flow rate.

Description

Technical Field

[0001] The invention relates to the technical field of an electrically controlled directional multi-way valve, and in particular to an external control positioning device based on an electrically controlled directional multi-way valve. Background Art

[0002] The reversing multi-way valve is widely used in the motion control of various engineering equipment. Its operation types are diverse, including electric control, manual control, hydraulic control and other operation types. Electric control with manual emergency function is a common form. In practical applications, the output and input signals of the electric control multi-way valve are required to be in a certain linear proportional relationship, and automatically return to the middle position when there is no electrical signal. When the system is powered off, the multi-way valve can only be operated manually in an emergency. However, due to the need for simultaneous operation of multiple actions in the equipment during manual control, the output of some circuits of the multi-way valve needs to be kept constant, so it is required that the multi-way valve can be stabilized in a position when it is manipulated to a certain opening so as to maintain a constant flow output. However, it is very difficult to set the electric control unit and the manual control positioning unit in the same multi-way valve mechanism. Therefore, this patent adds a control positioning device to the outside of the multi-way valve, which can realize the flow output of the electric control multi-way valve when there is power, and the flow output of the multi-way valve is controlled by external manual control when there is a power outage, so as to achieve the purpose of making the multi-way valve output a constant flow at any opening in the case of a power outage. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides an external control positioning device based on an electrically controlled reversing multi-way valve. When the device is powered on, it uses an electrical control mode to control the operation of the multi-way valve through an electrical signal. When the power is off, it switches to a working mode in which the multi-way valve is controlled by an external position control positioning device. In this working mode, the multi-way valve can achieve a constant output of any flow rate. The technical solution is as follows:

[0004] The invention discloses an external control positioning device based on an electrically controlled directional multi-way valve, which comprises a transmission unit synchronously linked with a main valve core of the electrically controlled directional multi-way valve and a control positioning unit for locking the transmission unit.

[0005] Preferably, the transmission unit includes a first base, a rotating shaft, and a first connecting rod. The rotating shaft is arranged in the first base, and one end of the rotating shaft extends out of the first base and can be locked by the controllable positioning unit; one end of the first connecting rod is arranged on the rotating shaft, and the other end is connected to the main valve core, and the rotating shaft can be synchronously linked with the main valve core.

[0006] Preferably, the control positioning unit includes a second base, a slider arranged inside the second base, a stop block with one end extending out of the side wall of the second base and the other end connected to the slider, a first control rod arranged on the second base and used to control the displacement of the slider, and the bottom surface of the second base is arranged on the top surface of the first base; the stop block is used to lock the rotating shaft.

[0007] Preferably, the first control rod is threadedly connected to the second base; in addition, the control positioning unit also includes a first spring for assisting the first control rod to accurately control the displacement distance of the slider, which is located between the bottom of the first control rod and the top of the slider.

[0008] Preferably, a boss is fixedly provided on the slider, and the first spring is sleeved on the outer wall of the boss; the control positioning unit also includes a second spring for automatic reset of the slider, one end of which is connected to the bottom of the slider, and the other end is connected to the inner wall of the second base.

[0009] Preferably, the transmission unit further comprises a transmission block, which is arranged outside the first base and fixedly connected to the rotating shaft, and the transmission block can lock the stop block.

[0010] Preferably, the stop block is a cylindrical pin.

[0011] Preferably, the transmission block is provided with an arc surface for locking the stop block, and a notch is provided at the midline of the arc surface for increasing the contact area between the stop block and the transmission block.

[0012] Preferably, a second control rod is also provided on the transmission block for facilitating the control of the rotation angle of the transmission block.

[0013] Preferably, the transmission unit also includes a second connecting rod to ensure that the main valve core always moves on the same straight line trajectory, one end of which is connected to the first connecting rod and the other end of which is connected to the main valve core.

[0014] The beneficial effects are as follows:

[0015] 1. Without changing the structure of the original electric multi-way valve, this device is designed with a manually operated external control positioning device, which can maintain the multi-way valve to output a constant flow of any size when the system is powered off, so that the working device controlled by the multi-way valve continues to maintain its original state, avoiding accidents and ensuring the safety and stability of the operation of related devices. This device has a simple structure and is easy to operate. When the power is off, the multi-way valve needs to maintain a certain constant flow output. The first control rod can be used to control the displacement of the slider, and the slider drives the stop block to move. The stop block locks the transmission block, thereby controlling the transmission block to stop rotating, and then controlling the rotating shaft, the first connecting rod, and the second connecting rod to stop moving in turn, so that the main valve core connected to the second connecting rod stops at a certain position, thereby achieving the purpose of the multi-way valve maintaining a certain flow constant output.

[0016] 2. The device is cleverly designed: ① When the multi-way valve is switched to manual mode, the stop block is required to lock the transmission block, and the first control rod is operated to push the slider at the starting position along the thread direction, thereby pushing the stop block on the slider to approach the transmission block. The setting of the first spring can assist the first control rod to accurately control the displacement distance of the slider and control the locking degree between the stop block and the transmission block, that is, the magnitude of the friction force; ② When the multi-way valve is switched to the electric control mode, the stop block is required to leave the transmission block, and the first control rod is operated to move away from the slider along the thread direction. The second spring can push the slider back to the starting position under the action of elastic force; ③ When the main valve core is in the middle position, the reversing multi-way valve is in a closed state. In order to prevent the main valve core from being wrongly reversed by inertia when returning to the middle position, a notch is set on the middle transmission block. The notch can increase the contact area between the stop block and the transmission block, thereby increasing the friction between the two, thereby preventing the transmission block from rotating an unnecessary angle due to inertia when returning to the middle position (for example, it only needs to rotate from the 11 o'clock direction of the hour hand to the 12 o'clock direction of the hour hand, but it turns to the 1 o'clock direction of the hour hand). ④ As the installation space of the reversing multi-way valve is compact and the space for the main valve core to move back and forth is limited, a second connecting rod is designed, one end of which is connected to the first connecting rod and the other end is connected to the main valve core. This ensures that the main valve core always moves on the same straight line trajectory and adapts to the limited working space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The overall structural diagram of the device is shown;

[0018] Figure 2 A front view of the device is shown;

[0019] Figure 3 Shown Figure 2 AA section view in;

[0020] Figure 4 Shown Figure 2 Schematic diagram of the structure of the medium BB;

[0021] Figure 5 A schematic diagram showing the structural relationship between the transmission block, the rotating shaft, the first connecting rod and the second connecting rod is shown;

[0022] Figure 6 A front view showing an external control positioning device connected to an electrically controlled directional multi-way valve;

[0023] Figure 7 The right side view shows the external control positioning device connected to the electric control reversing multi-way valve;

[0024] Figure 8 Shown Figure 7 Cross-sectional view of CC;

[0025] Fig. 9 Shown Figure 8 A partial enlarged view of the middle A;

[0026] Fig.10 The structural schematic diagram of the reversing multi-way valve is shown;

[0027] Fig.11 Shown Fig.10 Cross-sectional view of DD.

[0028] In the figure: 1-control positioning unit; 1-1-second base; 1-2-slider; 1-3-stop block; 1-4-first control rod; 1-5-first spring; 1-6-boss; 1-7-second spring; 2-transmission unit; 2-1-first base; 2-2-rotating shaft; 2-3-first connecting rod; 2-4-transmission block; 2-4-1-notch; 2-4-2-second control rod; 2-5-second connecting rod; 3-electrically controlled reversing multi-way valve; 3-1-main valve core; 3-2-third spring; 3-3-upper spring limit nut; 3-4-lower spring limit nut; 3-5-connecting screw, 3-6-electromagnetic proportional valve; 3-7-hydraulic oil pipeline; 3-8-valve base; 3-9-outer cover; 3-10-groove. DETAILED DESCRIPTION

[0029] The present invention is further explained below in conjunction with the accompanying drawings and specific implementation cases. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0030] like Figures 1 to 5 As shown, a schematic diagram of the structure of an external control positioning device connected to the outside of an electrically controlled directional multi-way valve is shown, the device comprises a control positioning unit 1, a main valve core 3-1 respectively connected to the electrically controlled directional multi-way valve 3 and a transmission unit 2 of the control positioning unit, wherein the control positioning unit 1 comprises a second base 1-1, a slider 1-2 arranged inside the second base, a stop block 1-3 with one end extending out of the side wall of the second base and the other end connected to the slider, a first control rod 1-4 arranged on the second base and used for controlling the displacement of the slider; the first control rod is threadedly connected to the second base;

[0031] The transmission unit 2 includes a first base 2-1, a rotating shaft 2-2, a first connecting rod 2-3 and a transmission block 2-4, wherein the first base is fixedly arranged at the bottom of the second base, the rotating shaft passes through the first base horizontally, and one end thereof extends out of the side wall of the first base to connect with the transmission block, that is, the rotating shaft rotates synchronously with the transmission block, and the other end of the rotating shaft is rotatably arranged in the side wall of the first base; the stop block is displaced in the direction of the transmission block, and the two can be locked in the end; one end of the first connecting rod is arranged on the rotating shaft, and the other end is connected to the main valve core. The functional relationship between the various components of this device is that when the power is off, the multi-way valve needs to maintain a certain constant flow output, and the slider displacement can be controlled by the first control rod, the slider drives the stop block displacement, and the stop block locks the transmission block, thereby controlling the transmission block to stop rotating, and then controlling the rotating shaft and the first connecting rod to stop moving in turn, so that the main valve core connected to the second connecting rod stops at a certain position, thereby achieving the purpose of the multi-way valve maintaining a certain flow constant output.

[0032] The design advantage is that without changing the structure of the original electric-controlled multi-way valve, a manually operated external control positioning device is designed. In the event of a power outage in the system, the multi-way valve can maintain a constant output flow of any size, so that the working device controlled by the multi-way valve continues to maintain its original state, avoiding accidents and ensuring the safety and stability of the operation of related devices.

[0033] Furthermore, the control positioning unit 1 also includes a first spring 1-5 for assisting the first control rod to accurately control the displacement distance of the slider, which is located between the bottom of the first control rod and the top of the slider; a boss 1-6 is fixedly provided on the slider, and the first spring is sleeved on the outer wall of the boss; the control positioning unit also includes a second spring 1-7 for automatic reset of the slider, one end of which is connected to the bottom of the slider, and the other end is connected to the inner wall of the second base.

[0034] The advantages of the design are: ① When the multi-way valve is switched to manual mode, the stop block is required to lock the transmission block, and the first control rod is operated to push the slider at the starting position along the thread direction, thereby pushing the stop block on the slider closer to the transmission block. The setting of the first spring can assist the first control rod to accurately control the displacement distance of the slider and control the locking degree between the stop block and the transmission block, that is, the magnitude of the friction force; ② When the multi-way valve is switched to electric control mode, the stop block is required to leave the transmission block, and the first control rod is operated to move away from the slider along the thread direction. The second spring can push the slider back to the starting position under the action of elastic force.

[0035] Furthermore, the stop block is a cylindrical pin shaft; the transmission block is provided with an arc surface for fitting with the stop block, and a notch 2-4-1 is provided at the midline of the arc surface for increasing the contact area between the stop block and the transmission block, and the shape of the notch can be semicircular.

[0036] The advantages of the above design are: the cylindrical pin shaft and the arc surface on the transmission block are conducive to easily adjusting the friction between the stop block and the transmission block; in addition, when the main valve core is in the middle position, the reversing multi-way valve is in a closed state. In order to prevent the main valve core from being incorrectly reversed due to inertia when returning to the middle position, a notch is set on the middle position transmission block. The notch can increase the contact area between the stop block and the transmission block, thereby increasing the friction between the two, thereby preventing the transmission block from rotating an unnecessary angle due to inertia when returning to the middle position (for example, it only needs to rotate from the 11 o'clock direction of the hour hand to the 12 o'clock direction of the hour hand, but it turns to the 1 o'clock direction of the hour hand).

[0037] Furthermore, the transmission unit also includes a second connecting rod 2-5, one end of which is connected to the first connecting rod and the other end is connected to the main valve core, to ensure that the main valve core always moves on the same straight line track. The design has the advantage that: since the device space of the reversing multi-way valve is compact, the space for the main valve core to move back and forth is limited, so a second connecting rod is designed, one end of which is connected to the first connecting rod and the other end is connected to the main valve core, so that the main valve core can always move on the same straight line track and adapt to the limited working space.

[0038] In order to facilitate the adjustment of the main valve core to a constant flow output value, a second control rod 2-4-2 is also provided on the transmission block to facilitate the control of the rotation angle of the transmission block.

[0039] like Figures 6 to 11 As shown, a connection relationship diagram between the electrically controlled reversing multi-way valve and the external control positioning device is shown. The electrically controlled reversing multi-way valve includes a valve base, a main valve core, a third spring, an upper spring limit nut, a lower spring limit nut, an electromagnetic proportional valve, a hydraulic oil pipeline, and an outer cover. The top surface of the valve base is arranged on the bottom surface of the first base, the main valve core is arranged in the valve base, the upper end of the main valve core extends out of the top surface of the valve base and is inserted into the first base to be connected to the second connecting rod, and the lower end thereof is threadedly connected to the connecting screw 3-5; the top wall of the outer cover is fixedly arranged at the bottom of the valve base, and the third spring, the upper spring limit nut, the lower spring limit nut and the connecting screw are all arranged in the outer cover. The upper spring limiting nut and the lower spring limiting nut are sleeved on the lower end of the main valve core from top to bottom in sequence, and the longitudinal section of the lower end of the main valve core is T-shaped. The connecting screw is inserted into the inside of the main valve core from the bottom surface of the main valve core, and the nut part of the connecting screw is retained outside the main valve core. The nut part of the connecting screw and the lower end of the main valve core together form an "I" shape. The third spring 3-2 is sleeved in the middle of the "I" shape, and its two ends are respectively connected to the upper spring limiting nut and the lower spring limiting nut. Under the action of the third spring, the upper spring limiting nut and the lower spring limiting nut are limited in the middle of the "I" shape for resetting the main valve core;

[0040] In this specific embodiment, a groove 3-10 is also provided at the bottom of the outer cover for the main valve core to extend and limit the extension amount. When the connecting screw is locked with the inner wall of the groove, the main valve core stops extending; when the upper spring limit nut and the lower spring limit nut are locked, the main valve core stops retracting. The electromagnetic proportional valve is arranged in the valve base and connected to the main valve core through a hydraulic oil pipeline (because it is common knowledge that the hydraulic oil acts on the main valve core through the hydraulic oil volume, its connection relationship and working principle will not be described in detail here). When the power is on, the electromagnetic proportional valve controls the hydraulic oil flow rate to push the main valve core to extend and retract.

[0041] Here’s how it works:

[0042] 1. When the power is on, the electric control reversing multi-way valve is in the electric control mode. The electromagnetic proportional valve controls the flow of hydraulic oil to push the main valve core out. At the same time, the force of the third spring 3-2 is used to control the main valve core to be in a certain position, that is, the multi-way valve is in a certain working state. At this time, the external control positioning device does not work. Specifically, the transmission block 2-4 does not contact the stop block 1-3, and the main valve core is completely not controlled by the external control positioning device.

[0043] 2. When the system is powered off, the electronically controlled directional multi-way valve switches to manual mode and the electromagnetic proportional valve stops working. Figure 1 As shown,

[0044] (1) Forward maximum flow constant output

[0045] The second control rod 2-4-2 rotates clockwise to drive the transmission block 2-4 to rotate clockwise, and the transmission block 2-4 synchronously drives the rotating shaft 2-2 and the first connecting rod 2-3 to rotate clockwise, and the first connecting rod 2-3 pushes the second connecting rod 2-5 and the main valve core 3-1 to move toward the groove 3-10 in turn, until the main valve core locks the inner wall position of the groove, and the third spring is compressed; the first control rod 1-4 is rotated clockwise, the first control rod presses down the slider 1-2, and the slider synchronously drives the stop block 1-3 to move toward the transmission block 2-4, and finally the stop block 1-3 is locked with the transmission block 2-4. After releasing the second control rod 2-4-2, the transmission block also stops rotating because it is clamped by the stop block. At this time, it is assumed that the gap stays at the 2 o'clock direction of the hour hand.

[0046] (2) Constant flow output between the forward maximum and the middle position (i.e. closed state)

[0047] When the flow needs to be appropriately reduced, that is, when the main valve core is appropriately retracted, the first control rod 1-4 can be rotated counterclockwise, and the first control rod gradually reduces the force on the slider 1-2. The slider is displaced to the starting position of the slider under the force of the second spring 1-7, and the stop block 1-3 is synchronously driven to move away from the transmission block 2-4. After the stop block 1-3 and the transmission block 2-4 are properly loosened, due to the force of the third spring, the main valve core and the second connecting rod are displaced away from the groove, and the second connecting rod pushes the first connecting rod, the rotating shaft, and the transmission block to rotate counterclockwise. When the required position is reached, the first control rod 1-4 is rotated clockwise again, and the first control rod presses the slider 1-2, and the slider synchronously drives the stop block 1-3 to move toward the transmission block 2-4. Finally, the stop block 1-3 and the transmission block 2-4 are locked. After the second control rod 2-4-2 is released, the transmission block also stops rotating because it is clamped by the stop block. At this time, it is assumed that the gap stays at 1 o'clock on the hour hand.

[0048] (3) No flow output

[0049] When flow output is not required (when the main valve core is in the middle position), the first control rod 1-4 can be rotated counterclockwise, and the first control rod gradually reduces the force on the slider 1-2. Under the force of the second spring 1-7, the slider moves to the starting position of the slider, and simultaneously drives the stop block 1-3 to move away from the transmission block 2-4. After the stop block 1-3 and the transmission block 2-4 are properly loosened, the rotating block can automatically rotate counterclockwise into the notch 2-4-1. Due to the increase in the contact area between the stop block 1-3 and the transmission block 2-4, the friction force increases, which can prevent the transmission block from rotating in the 11 o'clock direction under the action of inertia. At this time, the notch stays at the 12 o'clock direction of the hour hand.

[0050] (4) Negative maximum flow constant output

[0051] The first control rod 1-4 can be rotated counterclockwise, and the first control rod gradually reduces the force on the slider 1-2. Under the force of the second spring 1-7, the slider moves to the starting position of the slider, and synchronously drives the stop block 1-3 to move away from the transmission block 2-4. After the stop block 1-3 and the transmission block 2-4 are released, the second control rod 2-4-2 rotates counterclockwise to drive the transmission block 2-4 to rotate counterclockwise. The transmission block 2-4 synchronously drives the rotating shaft 2-2 and the first connecting rod 2-3 to rotate counterclockwise, and the first connecting rod 2-3 pulls the second connecting rod in turn. 2-5, the main valve core 3-1 is displaced away from the groove 3-10 until the upper spring limit nut 3-3 and the lower spring limit nut 3-4 are locked, and the third spring is compressed at this time; the first control rod 1-4 is turned clockwise, and the first control rod presses down the slider 1-2, and the slider synchronously drives the stop block 1-3 to move toward the transmission block 2-4, and finally the stop block 1-3 and the transmission block 2-4 are locked. After releasing the second control rod 2-4-2, the transmission block also stops rotating because it is clamped by the stop block. At this time, it is assumed that the gap stays at the 10 o'clock direction of the hour hand.

[0052] Similarly, a constant flow output between the negative maximum and the middle position can be achieved through operation.

[0053] In addition, there are many specific implementation methods and approaches of the present invention, and the above is only a preferred implementation of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. An external control positioning device based on an electrically controlled directional multi-way valve, characterized in that: The device comprises a transmission unit (2) synchronously linked with a main valve core (3-1) of an electrically controlled directional multi-way valve (3), and a control positioning unit (1) for locking the transmission unit; The transmission unit (2) comprises a first base (2-1), a rotating shaft (2-2), and a first connecting rod (2-3); the rotating shaft (2-2) is arranged in the first base (2-1), one end of which extends out of the first base (2-1) and can be locked by the control positioning unit (1); one end of the first connecting rod (2-3) is arranged on the rotating shaft, and the other end is connected to the main valve core (3-1); the rotating shaft (2-2) can be synchronously linked with the main valve core (3-1); The control positioning unit (1) comprises a second base (1-1), a slider (1-2) arranged inside the second base (1-1), a stop block (1-3) with one end extending out of a side wall of the second base (1-1) and the other end connected to the slider (1-2), a first control rod (1-4) arranged on the second base (1-1) and used for controlling the displacement of the slider (1-2), and the bottom surface of the second base (1-1) is arranged on the top surface of the first base (2-1); the stop block (1-3) is used for locking the rotating shaft (2-2); The first control rod (1-4) is threadedly connected to the second base (1-1); in addition, the control positioning unit (1) also includes a first spring (1-5) for assisting the first control rod (1-4) to accurately control the displacement distance of the slider (1-2), and the first spring (1-5) is located between the bottom of the first control rod (1-4) and the top of the slider (1-2); A boss (1-6) is fixedly provided on the slider, and the first spring (1-5) is sleeved on the outer wall of the boss (1-6); the control positioning unit also includes a second spring (1-7) (1-7) for automatically returning the slider (1-2), one end of which is connected to the bottom of the slider (1-2) and the other end of which is connected to the inner wall of the second base (1-1); The transmission unit (2) further comprises a transmission block (2-4), the transmission block (2-4) being arranged outside the first base (1-1) and fixedly connected to the rotating shaft (2-2), and the transmission block (1-3) being capable of locking the stop block (1-3); When the multi-way valve is switched to manual mode, the stop block (1-3) is required to lock the transmission block (2-4), and the first control rod (1-4) is operated to push the slider (1-2) at the starting position along the thread direction, thereby pushing the stop block (1-3) on the slider (1-2) closer to the transmission block (2-4). The first spring (1-5) can assist the first control rod (1-4) in accurately controlling the displacement distance of the slider (1-2) and controlling the locking degree between the stop block (1-3) and the transmission block (2-4), that is, the magnitude of the friction force; When the multi-way valve is switched to the electric control mode, the stop block (1-3) needs to leave the transmission block (2-4), and the first control rod (1-4) is operated to move away from the slider (1-2) along the thread direction, and the second spring (1-7) can push the slider (1-2) to return to the starting position under the action of the elastic force.

2. The externally controlled positioning device according to claim 1, characterized in that: The stop block is a cylindrical pin.

3. The externally controlled positioning device according to claim 2, characterized in that: The transmission block is provided with an arc surface for locking the stop block, and a notch (2-4-1) is provided at the midline of the arc surface for increasing the contact area between the stop block and the transmission block.

4. The externally controlled positioning device according to claim 3, characterized in that: The transmission block is also provided with a second control rod (2-4-2) for facilitating control of the rotation angle of the transmission block.

5. The externally controlled positioning device according to any one of claims 1 to 4, characterized in that: The transmission unit also includes a second connecting rod (2-5) provided to ensure that the main valve core always moves on the same straight line track, one end of the second connecting rod is connected to the first connecting rod, and the other end is connected to the main valve core.

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