RU92930U1 - CONTROL DEVICE FOR PIPELINE CONTROL BODY - Google Patents

Abstract

 1. The control device of the shut-off and regulating body of pipe fittings, comprising a housing, an electric motor, a manual backup drive, a limit switch block kinematically connected to the output shaft of the device, a gearbox including a cylindrical gear located on the input shaft of the gearbox, and a worm gear located on the output shaft of the gearbox and consisting of a worm wheel and a worm shaft, characterized in that a maximum torque limiter is introduced, which is located on the outer the device body and contains an elastic element, a transmission link mounted coaxially with the worm shaft, a bracket with an articulated pusher with stops, microswitches, a damper element. ! 2. The device according to claim 1, characterized in that the elastic element is made at least in the form of a spring module. ! 3. The device according to claim 1, characterized in that the transmission link is made, at least in the form of a bearing assembly. ! 4. The device according to claim 1, characterized in that the microswitches are fixed with the possibility of interaction with the stops of the pushers. ! 5. The device according to claim 1, characterized in that the damper element is made at least in the form of a strap.

Description

The utility model relates to mechanical engineering, in particular to electromechanical actuators controlling shutoff valves.

A device for controlling the shut-off and regulating body of pipe valves according to US patent No. 4754949, 07/05/1988, which contains an electric motor, a locking unit, a gearbox, a manual drive, a limit switch block kinematically connected with the output shaft of the device.

The closest analogue to the proposed utility model in terms of technical nature and the technical result achieved is a control device for valves and fittings of the pipeline valves according to the patent RU No. 44898, which contains an electric motor, a manual backup drive located at the end of the worm shaft, and a limit switch block kinematically connected with the output shaft of the device, a gearbox comprising a cylindrical gear located in its housing located on gearbox input shaft, and a worm gear located on the gearbox output shaft.

The disadvantages of the analogue and the prototype is the limited protection of the reinforcement from breakdowns in the event of abnormal loads (jamming, ingress of foreign bodies into the cavity of the reinforcement) in the intermediate position of the valve's shutoff-regulating body.

The technical result of the proposed utility model is to increase the reliability of the control device shut-off and regulating body of pipe fittings.

The technical result is achieved by the fact that in the control device of the shut-off and regulating body of the pipe fittings, comprising a housing, an electric motor, a manual backup drive, a limit switch block kinematically connected to the output shaft of the device, a gearbox including a cylindrical gear located on the input shaft of the gearbox, and a worm gear a gear located on the output shaft of the gearbox and consisting of a worm wheel and a worm shaft, a maximum torque limiter is introduced, which is located false on the outside of the device and contains an elastic element, a transmission link mounted coaxially with the worm shaft, a bracket with a pivotally mounted pusher with stops, microswitches, a damper element.

The elastic element is made at least in the form of a spring module. The transmission link is made, at least in the form of a bearing assembly. Microswitches are fixed with the possibility of interaction with the stops of the pushers. The damper element is made at least in the form of a strap.

The essence of the utility model is illustrated by an example of a structural embodiment of a control device for a shut-off and regulating body of pipe fittings, where Fig. 1 shows a maximum torque limiter (in a section), and Fig. 2 is a kinematic diagram of a control device of a shut-off and regulating body of pipe fittings.

The control device for the shut-off and regulating body of the pipe fittings consists of a housing 1, an electric motor 2, a gearbox 3, including a cylindrical gear 4 located on the input shaft 5 of the gearbox, and a worm gear, located on the output shaft 6 of the gearbox and consisting of a worm gear 7 and a shaft -worm 8, maximum torque limiter 9.

The maximum torque limiter 9 contains, placed on the worm shaft 8, an elastic element made in the form of a spring module 10, a transmission link made in the form of a bearing assembly 11. Two brackets 13, 14 are placed in the housing 12 of the limiter located on the outside of the device housing 1 for fastening the microswitches 15, 16, the pusher 18 with stops 19, 20 pivotally mounted on the bracket 17 and the damper element made in the form of a strap 21. The strap 21 is fixed between the brackets 13, 14 and serves as a stop and a damper. The limiter housing 12 is closed by a cover 22.

Before starting work, the proposed control device pre-configure its limiter maximum torque. The method of setting the limiter maximum torque is as follows. On the brackets 13, 14 there are six narrow grooves marked with the numbers "1" and "6", which determine the range of torque settings on the output shaft. To determine the set torque on the output shaft, it is necessary to follow the appropriate setting schedule for the “OPEN” or “CLOSED” positions. When adjusting the limiter for a given moment, it is necessary to loosen the nut 23, move the stops 19 or 20 of the pusher 18, turning it along the thread, in the direction of the corresponding slot number, determined on the graph. After adjusting, nut 23 must be tightened.

The control device shut-off and regulating body of pipe fittings works as follows. To move the valve's locking and regulating body to one of the end positions, the motor 2 is turned on. The rotation of the motor shaft 2 is transmitted to the input shaft 5 of the gearbox 3. Then, through the spur gear 4, the worm shaft 8 and the worm wheel 7, the rotation is transmitted to the output shaft 6 of the gearbox 3. When the valve reaches the shut-off-regulating body in the "Closed" or "Open" position, or in any intermediate position, the maximum torque value equal to the value set when setting the limiter moment of operation, the output shaft 6 stops. Since the electric motor 2 remains connected to the network, the torque from the shaft of the electric motor 2 is transmitted through the spur gear 4 to the worm shaft 8, as a result of which the worm shaft 8 begins to move in the axial direction. The spring module 10 senses the axial force generated by the ultimate torque of the output shaft. The axial movement of the shaft of the worm 8 is transmitted through the bearing assembly 11 and the bracket 17 to the pusher 18 pivotally mounted with stops 19 or 20. The strap 21 fixed between the brackets 13, 14 limits the further movement of the pusher 18, and the pusher 18 makes an angular movement with the corresponding stops 19 or 20, causing the switching of the contacts of the microswitches 15 or 16, which leads to the breaking of the electric circuit of the electric motor 2.

In the event that the motor 2 is not turned off when one of the microswitches 15 or 16 is triggered, then the bracket 21, which acts as a damper, protects the microswitch 15 from breaking. To exclude the operation of the opposite microswitch 16 when the worm shaft 8 is shifted in the opposite direction at the beginning of the reverse rotation of the electric motor 2 after it stops from the operation of this microswitch 16, an electric circuit for connecting control circuits is used.

The maximum torque limiter has two microswitches for issuing a signal to stop the engine when closing and opening. The limiter can also operate when abnormal loads occur (jamming, foreign bodies entering the valve cavity) in the intermediate position of the valve's shutoff-regulating body. Thus, the introduced maximum torque limiter protects the valve from breakage and ensures reliable shutoff of the medium flow.

The inventive device can be repeatedly reproduced on modern equipment and is planned to be used to control the shut-off and regulating body of the pipe fittings in the developed actuators, which allows us to conclude that it meets the criterion of "industrial applicability" for the utility model.

Claims (5)

1. The control device of the shut-off and regulating body of pipe fittings, comprising a housing, an electric motor, a manual backup drive, a limit switch block kinematically connected to the output shaft of the device, a gearbox including a cylindrical gear located on the input shaft of the gearbox, and a worm gear located on the output shaft of the gearbox and consisting of a worm wheel and a worm shaft, characterized in that a maximum torque limiter is introduced, which is located on the outer the device body and contains an elastic element, a transmission link mounted coaxially with the worm shaft, a bracket with an articulated pusher with stops, microswitches, a damper element. 2. The device according to claim 1, characterized in that the elastic element is made at least in the form of a spring module. 3. The device according to claim 1, characterized in that the transmission link is made, at least in the form of a bearing assembly. 4. The device according to claim 1, characterized in that the microswitches are fixed with the possibility of interaction with the stops of the pushers. 5. The device according to claim 1, characterized in that the damper element is made at least in the form of a strap.