Lead screw connection electric gate valve with rigid-flexible combination device

Abstract

The invention relates to a lead screw connection electric gate valve with a rigid-flexible combination device, which comprises a motor, a gearbox, a power lead screw, a screw sleeve and a gate valve, and further comprises a moving plate, a connecting plate, an adjusting screw rod, an adjusting nut, an upper buffer spring and a lower buffer spring, the adjusting screw rods vertically penetrate through the front portion of the movable plate and the rear portion of a gate of the gate valve respectively, the two ends of the connecting plate are fixed to the upper ends of the corresponding adjusting screw rods respectively, the upper portions of the adjusting screw rods are sleeved with the upper buffer springs, the lower portions of the adjusting screw rods are sleeved with the lower buffer springs, and the adjusting nuts are screwed to the lower ends of the corresponding adjusting screw rods respectively. According to the technical scheme, the rigid-flexible combination device is additionally arranged, normal opening and closing of the gate valve can be guaranteed, the locking probability of the power lead screw is greatly reduced, normal operation of the gate valve is guaranteed, meanwhile, vertical stress is greatly reduced, the fault rate of the gate valve is reduced, and the gate valve can operate for a long period, is simple in structure and is widely applied.

Description

Technical Field

[0001] The invention relates to an electric control device, in particular to a lead screw-connected electric gate valve with a rigid-flexible combination device. Background Art

[0002] At present, the connection method of electric gate valve generally adopts the motor to be directly connected to the power screw through the gearbox. The thread sleeve screwed on the power screw directly drives the control end of the gate valve to work. It has the advantages of low cost and simple structure.

[0003] In the prior art, a thread sleeve is installed on the plug plate, and a power lead screw is connected to the thread sleeve, so that the motor, the power lead screw and the plug plate are connected as a whole and rigidly connected. When the plug plate is in operation, it is easily affected by external forces, especially when the working environment is poor. When foreign matter enters the plug track of the plug valve, the plug plate will shake up and down or left and right, which often causes force between the power lead screw and the thread sleeve, and it is very easy to cause the power lead screw and the thread sleeve to lock, and the plug plate cannot move, thereby causing the electric plug valve to malfunction. Summary of the invention

[0004] In view of this, the main purpose of the present invention is to provide a screw-connected electric gate valve with a rigid-flexible combination device. Through this technical solution, the connection method between the power screw and the gate is designed, and a rigid-flexible combination device is added, which ensures that the gate valve can be opened and closed normally, and greatly reduces the probability of the power screw locking, thereby ensuring the normal operation of the gate valve.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is implemented as follows: a screw-connected electric gate valve with a rigid-flexible combination device, comprising a motor, a gearbox, a power screw, a thread sleeve and a gate valve, wherein the motor is connected to the input end of the gearbox, the output end of the gearbox is connected to the power screw, the thread sleeve is screwed onto the power screw, and is characterized in that it also includes a moving plate, a connecting plate, an adjusting screw, an adjusting nut, an upper buffer spring and a lower buffer spring, the thread sleeve is fixed on the rear end of the moving plate, and the adjusting screw is vertically penetrated through the front of the moving plate and the gate valve respectively. On the rear part of the valve plug plate, the two ends of the connecting plate are respectively fixed to the corresponding upper ends of the adjusting screws, the upper buffer spring is sleeved on the upper part of the adjusting screw, the upper ends of the upper buffer springs are respectively pressed against the lower side of the connecting plate, the lower ends of the upper buffer springs are respectively pressed against the upper sides of the moving plate and the plug plate of the plug plate valve, the lower buffer spring is sleeved on the lower part of the adjusting screw, the upper ends of the lower buffer springs are respectively pressed against the lower sides of the moving plate and the plug plate of the plug plate valve, the adjusting nuts are respectively screwed on the corresponding lower ends of the adjusting screws, and the upper sides of the adjusting nuts are respectively pressed against the corresponding lower ends of the lower buffer springs.

[0006] As a further technical solution, the adjusting screws are vertically installed on the front of the movable plate and the rear of the gate valve gate on both sides of the power screw, and the two ends of the two connecting plates are respectively fixed to the upper ends of the two adjusting screws on the same side of the screw.

[0007] The beneficial effect of adopting the above technical scheme is: a screw-connected electric gate valve with a rigid-flexible combination device. Through this technical scheme, the connection method between the power screw and the gate is designed, and a rigid-flexible combination device is added, which ensures that the gate valve can be opened and closed normally, and greatly reduces the probability of the power screw locking, ensuring the normal operation of the gate valve, and also greatly reduces the upper and lower stresses, reduces the failure rate of the gate valve, and the gate valve can be used for a long period of operation, and has a simple structure and is widely used. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a side structural schematic diagram of the present invention.

[0009] Figure 2 for Figure 1 Schematic diagram of the top view structure.

[0010] In the figure, 1 is a motor, 2 is a gearbox, 3 is a power screw, 4 is a threaded sleeve, 5 is a gate valve, 6 is a moving plate, 7 is a connecting plate, 8 is an adjusting screw, 9 is an adjusting nut, 10 is an upper buffer spring, 11 is a lower buffer spring, and 12 is a gate valve gate. DETAILED DESCRIPTION

[0011] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0012] like Figure 1 and Figure 2As shown, the lead screw-connected electric gate valve with a rigid-flexible combination device of the present invention comprises a motor 1, a gearbox 2, a power lead screw 3, a thread sleeve 4 and a gate valve 5, wherein the motor 1 is connected to the input end of the gearbox 2, and the output end of the gearbox 2 is connected to the power lead screw 3, the thread sleeve 4 is screwed onto the power lead screw 3, and further comprises a moving plate 6, a connecting plate 7, an adjusting screw 8, an adjusting nut 9, an upper buffer spring 10 and a lower buffer spring 11, the thread sleeve 4 is fixed on the rear end of the moving plate 6, the adjusting screw 8 is vertically inserted through the front of the moving plate 6 and the rear of the gate valve gate 12, respectively, the connecting plate The two ends of 7 are respectively fixed to the corresponding upper ends of the adjusting screws 8, the upper buffer spring 10 is sleeved on the upper part of the adjusting screw 8, the upper ends of the upper buffer springs 10 are respectively pressed against the bottom of the connecting plate 7, the lower ends of the upper buffer springs 10 are respectively pressed against the upper surfaces of the moving plate 6 and the plug-in valve plug-in plate 12, the lower buffer spring 11 is sleeved on the lower part of the adjusting screw 8, the upper ends of the lower buffer springs 11 are respectively pressed against the lower surfaces of the moving plate 6 and the plug-in valve plug-in plate 12, the adjusting nuts 9 are respectively screwed on the corresponding lower ends of the adjusting screws 8, and the upper surfaces of the adjusting nuts 9 are respectively pressed against the corresponding lower ends of the lower buffer springs 11.

[0013] As a further embodiment, the adjusting screw 8 is vertically installed on the front of the movable plate 6 and the rear of the gate valve gate 12 on both sides of the power screw 3, and the two ends of the two connecting plates 7 are respectively fixed to the upper ends of the two adjusting screws 8 on the same side of the power screw 3.

[0014] When the technical solution of the present invention is applied, a test comparison is carried out with the use cycle of two rigidly connected electric gate valves. When the gate valve 5 is opened once every hour, during the two continuous uses for one month, the power screw 3 is locked once every four days on average in the prior art, while the power screw 3 has never been locked after the technical solution is adopted.

[0015] During operation, the gate valve 5 is driven by the motor 1, and the motor 1 operates in a forward and reverse rotation mode to drive the power screw 3 to rotate slowly. The power screw 3 is connected to the thread sleeve 4, and the thread sleeve 4 drives the movable plate 6 and the gate valve gate 12 to move forward and backward. The movable plate 6 and the gate valve gate 12 are connected by an inverted U-shaped rigid-flexible combination device. The upper buffer spring 10 and the lower buffer spring 11 are respectively installed at the upper and lower connection points of the inverted U-shaped rigid-flexible combination device, so that the gate valve gate 12 can move up and down with a small amplitude. The upper buffer spring 10 and the lower buffer spring 11 play a role in offsetting the upper and lower stresses in the middle, converting the stress of the upper and lower activities into elastic force, thereby reducing the influence on the power screw 3.

[0016] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

1. A screw-connected electric gate valve with a rigid-flexible combination device, comprising a motor, a gearbox, a power screw, a thread sleeve and a gate valve, wherein the motor is connected to the input end of the gearbox, the output end of the gearbox is connected to the power screw, and the thread sleeve is screwed onto the power screw, characterized in that: The cam is secured to the rear of the sliding plate and is secured to the bottom of the sliding plate with respect to the guide rail. The cam is secured to the rear of the sliding plate and is secured to the bottom of the sliding plate with respect to the guide rail. The cam is secured to the rear of the sliding plate and is secured to the bottom of the sliding plate with respect to the guide rail.

2. The screw-connected electric gate valve with a rigid-flexible combination device according to claim 1, characterized in that: The adjusting screws are respectively vertically installed on the front of the moving plate and the rear of the plug plate of the plug valve on both sides of the power screw, and the two ends of the two connecting plates are respectively fixed to the upper ends of the two adjusting screws on the same side of the power screw.

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