RU56542U1 - ELECTRIC ACTUATOR WITH MANUAL DOUBLE ROTARY VALVE VALVE CONTROLLING PRESSURE IN THE PIPELINE IN AUTOMATIC MODE - Google Patents

Abstract

The utility model relates to pipeline valves, in particular, to electric actuators with a manual backup. The utility model can be used in the pipeline transport of oil, gas and other media for controlling rotary valves of valves that control the pressure of the medium in the pipeline, in particular, for controlling valve valves designed to maintain specified pressure values (minimum at the input and maximum at the output) by the method throttling of the medium flow during transients. The objective of the utility model is to simplify the design of a handwheel in an electric actuator for a rotary valve shutter, which regulates the pressure in the pipeline in automatic mode. The technical result consists in simplifying the kinematic scheme of the manual backup and in its implementation with the ability to disconnect the manual backup from the electric drive when the operator stops working with it.

An electric drive with a manual backup for a rotary valve shutter, which regulates the pressure in the pipeline in automatic mode, contains a housing with a hole, an electric motor with a regulating body located in the housing, a gearbox, the input link of which is kinematically connected to the motor shaft, and the output link is installed opposite the hole in the housing. Manual backup, including a shaft and a handle for rotating the shaft. The handwheel shaft is perpendicular to the motor shaft. A gear wheel is fixedly mounted on the shaft of the handwheel. A gear wheel is also fixedly mounted on the motor shaft, the gear ring of which is located on its end surface and is kinematically connected and disconnected with the gear on the handwheel shaft during longitudinal movement of the handwheel shaft. Moreover, on the shaft of the handwheel there is a compression spring installed with the possibility of compression during the longitudinal movement of the shaft of the handwheel towards the shaft of the electric motor. The utility model is illustrated by two figures of the drawings.

Description

The utility model relates to pipeline valves, in particular, to electric actuators with a manual backup. The utility model can be used in the pipeline transport of oil, gas and other media for controlling rotary valves of valves that control the pressure of the medium in the pipeline, in particular, for controlling valve valves designed to maintain specified pressure values (minimum at the input and maximum at the output) by the method throttling of the medium flow during transients. Rotary valves include disk, ball and other valves that rotate around the axis on which they are mounted inside the pipeline. The axis of the butterfly valve is connected to the drive system. As a result of this rotation, the cross-sectional area of the pipeline and, consequently, the pressure of the medium in the pipeline change.

Known electric drive with a manual backup, presented in the materials of US patent No. 6079442, MKP F 16 K 31/05, F 16 K 31/053 (published June 27, 2000) and intended for control

rotary shutter valve. The valve shutter is made in the form of a disk, capable of turning a quarter of a turn between the open and closed position and, in particular, regulate the pressure in the pipeline. The rod (axis) 106, on which the disk is mounted and relative to which the disk is rotated (butterfly valve), is located along the diameter of the disk. The electric actuator comprises a housing configured to be mounted on a valve and having an opening in its outer wall.

In the electric drive according to US patent No. 6079442 there is also a reversible electric motor, the output shaft of which drives the gear 121 (Fig. 4). With a gear wheel 121, a spur gear 120 (FIGS. 4, 5, 7, 8) is engaged, fixedly mounted on the input shaft (worm shaft 116) of the electric drive gear.

The gearbox, in addition to these gears 120 and the worm shaft 116, contains a worm screw 115 and a worm wheel 114 (Fig.6). The worm wheel 114 has a sleeve 114A (FIG. 6) forming the upper end of the shaft 106 on which the valve shutter (disk) 105 (FIG. 1) is mounted. Thus, the worm wheel 114 is the output link of the gearbox, mounted opposite the hole in the valve body and is able to rotate in accordance with the rotation of the shaft 106. The worm screw 115 and its worm shaft 116 move freely along its axis in

limited space. And for this purpose, the gear wheel 121 (Fig. 4) connected to the motor shaft is made so wide that it can maintain kinematic connection with the spur gear 120 on the worm shaft 116 while the worm shaft 116 and the worm screw 115 are moving along their axis.

The handwheel according to US patent No. 6079442 contains (Figs. 5, 7, 8) a handwheel shaft 126, a rotation handle 125 connected to the shaft 126, and a mechanism for connecting and disconnecting the handwheel shaft 126 and the worm shaft 116. This mechanism includes a cavity 127, in which the end of the shaft 126 is mounted and which provides reciprocating movement of the shaft 126 within the cavity 127 (FIGS. 5, 7, 8). The mechanism for connecting and disconnecting the shaft 126 also includes a sleeve 132 located in the cavity 127 (Fig.5, 7, 8). One end of the sleeve 132 is fixedly connected or made for one with the end of the shaft 126 of the handwheel, and there are a number of slots 140 along the inner diameter of the other end of the sleeve 132 (Fig. 4A). A pin 141 passes through the right end of the worm shaft 116. When the handle 125 for rotation together with the sleeve 132 is pulled outward, the ends of the pin 141 enter the slots 140. This ensures the rotation of the worm shaft 116, the worm wheel 114 and the shaft 106 on which the disk is mounted (shutter ) 105 from rotation of the handle 125 (FIGS. 5, 7, 8, 1).

When you turn on the motor and the occurrence of this in the drive internal movement, the pin 141 leaves the slots 140 (figure 5). This is because the worm shaft 116 is spring loaded on both sides of the worm screw 115 and is free to move longitudinally in a limited space. Moreover, at the time when the drive is powered by an electric motor, the worm shaft 116 is not connected to a handwheel.

The rotation handle 125 is locked in the on or off position by means of spring ball retainers 135, which are pressed by springs into one of the long grooves 136 and 137 located around the inner diameter of the sleeve 130 (FIG. 5).

The manual backup also includes means for automatically terminating the motor before the kinematic connection of the shaft 126 of the manual backup and the worm shaft 116 of the gearbox with the motor turned on in case the operator accidentally decides to attach the manual backup. For these purposes, a switch 145 (Fig. 5) is mounted in the upper part of the housing, installed in such a position as to be used to turn off the electric motor when the sleeve 132 is moved outward using the handle 125 (Figs. 7, 8) (turning on the handwheel). Then, during the return of the shaft 126 to its internal position (disabling the manual backup), the sleeve 132 will act on

switch 145 and set it to a position to turn off the engine again.

The switch 145 is designed to be activated from the spring lever 148 (FIG. 4A), which passes through the centered holes in the housing, as well as through the sleeve 130, the lower end of the spring lever 148 being exposed to interact with the sleeve 132. When the handwheel is open, the lever 148 is in the upper position due to the sleeve 132. The switch 145 is closed to ensure the operation of the electric motor. When a handwheel is attached, the sleeve 132 is moved to the right by the handle 125, the lever 148 moves to the lower position, turns off the switch 145 and turns off the electric motor.

If this actuator is used to control a rotary shutter of a valve that regulates the pressure in the pipeline, in particular, it maintains a predetermined pressure value in the pipeline, then the actuator is turned on to rotate the shutter and change the area of the pipe cross-section when the pressure in the pipeline becomes inappropriate to the set value and turns off when the pressure in the pipeline reaches the set value. The most convenient and accurate is the automatic pressure control in the pipeline, at which the sensitive element (sensor) measures the adjustable value (pressure in

pipeline) or a disturbing effect from an adjustable quantity (for example, an increase in the load or torque on the valve) and, in accordance with the law of regulation, produces an effect on the regulatory body controlling the electric motor. As a result, a rotary valve plug connected to the electric actuator occupies a position providing a predetermined pressure value in the pipeline.

If a rotary valve is used to regulate the pressure and if this regulation is automatic, then the design of this actuator, in particular its manual backup, can be simplified.

The electric drive according to US patent No. 6079442 is the closest analogue to the claimed electric drive with a manual backup.

The objective of the utility model is to simplify the design of a handwheel in an electric actuator for a rotary valve shutter, which regulates the pressure in the pipeline in automatic mode.

The technical result consists in simplifying the kinematic scheme of the manual backup and in its implementation with the ability to disconnect the manual backup from the electric drive when the operator stops working with it.

As in the closest analogue of the inventive electric actuator with a manual backup for a rotary valve shutter that regulates

the pressure in the pipeline in automatic mode, contains a housing with a hole, an electric motor with a regulating body located in the housing, a gearbox, the input link of which is kinematically connected to the motor shaft, and the output link is installed opposite the hole in the housing, a handwheel, including a shaft and a handle for rotating the shaft and made with the possibility of kinematic connection and disconnection with the electric drive with the longitudinal movement of the shaft of the manual understudy.

Unlike the closest analogue, the shaft of the handwheel is located perpendicular to the shaft of the electric motor, the gear is fixedly mounted on the shaft of the handwheel, the gearwheel is fixedly mounted on the shaft of the electric motor, the gear ring of which is located on its end surface and is configured to kinematically connect and disconnect from the gear a wheel on the shaft of the handwheel during longitudinal movement of the shaft of the handwheel, and on the shaft of the handwheel there is a compression spring installed with the possibility of compression during the longitudinal movement of the shaft of the handwheel towards the shaft of the electric motor.

The claimed device is shown in figures 1 and 2 with the following notation: 1 - housing, 2 - hole in the housing, 3 - electric motor, 4 - regulating body of the electric motor, 5 -

gearbox, 6 - input gearbox link, 7 - electric motor shaft, 8 - gearbox output link, 9 - handwheel shaft, 10 - handle for rotating the handwheel shaft, 11 - gear wheel on the motor shaft, 12 - wheel gear 11, 13 - a gear wheel on the shaft of the handwheel, 14 - a spring on the shaft of the handwheel.

The inventive electric actuator with a manual backup for a rotary valve shutter, which regulates the pressure in the pipeline in automatic mode, has a motor 3 in the housing 1, having a body 4 that regulates the operation of the electric motor 3. For example, the regulating body 4 can turn the electric motor on and off at a given pressure value medium in the pipeline (not shown in the figures), on which a valve is installed (not shown in the figures), connected to the inventive electric actuator. The regulator 4 may turn off the electric motor 3 in case of excessive torque. The regulatory body 4 can be any device that can disconnect the electric motor from the power source or connect the electric motor to it (contactor, reversing starter, frequency converter of the current in the power supply network of the electric drive). For example, to smoothly stop or start the rotary shutter of the pressure regulating valve, the regulating body 4 of the electric motor 3 can be a current frequency converter in the electric drive network, to which a signal from

microprocessor-based automatic pressure control system. The latter, in turn, interacts with pressure sensors installed on the pipeline.

In the housing of the claimed device is also a gear 5. The gear 5 may be a worm, wave with intermediate rolling elements or any other. In the example of a specific embodiment, shown in figure 1, the gearbox 5 is made wave with intermediate rolling bodies.

The input link 6, which may be depending on the type of gearbox, for example, a worm shaft, a wave gear generator with intermediate rolling bodies, etc., is kinematically connected to the shaft 7 of the electric motor 3. The kinematic connection can be carried out, for example, with a worm gear account of the kinematic connection between the gear mounted on the input link (the worm shaft) and the spur gear (not shown in the figures) located on the shaft 7 of the electric motor 3. If the gearbox 5 is wave with an interval full-time rolling bodies, then the interaction of its input link 6 (generator) can be carried out due to the fact that the input link 6 of the gearbox 5 and the shaft 7 of the electric motor 3 are motionlessly connected by their ends (figure 1) during their sequential and coaxial installation.

The output link 8 of the gearbox 5 is installed opposite the hole 2 in the housing 1. This design is necessary for the kinematic connection of the claimed actuator with a rotary valve of the valve for which this actuator is provided when installing the valve and its electric actuator in the pipeline.

The handwheel includes a shaft 9 and a handle 10 for rotating the shaft 9. The shaft 9 of the handwheel is located perpendicular to the shaft 7 of the electric motor 3. A gear wheel 13 is fixedly mounted on the shaft 9 of the handwheel.

A gear wheel 11 is fixedly mounted on the shaft 7 of the electric motor 3, the gear ring 12 of which is located on its end surface and is configured to be kinematically connected and disconnected with the gear wheel 13 on the handwheel shaft 9 with a longitudinal movement of the handwheel shaft 9.

A similar type of transmission is called a cylinder-conical transmission with an angle of 90 ° between the axles and is described on pages 540-542 in the Handbook of the Designer of Optical-Mechanical Devices edited by M.Ya. Kruger and V.A. Panov (Mashinostroenie Publishing House, 1968. 760 pages )

The gear wheel 13 can be made in the form of a cylindrical gear with an involute profile and with teeth coinciding with the teeth 12 of the gear wheel 11 when they are engaged.

The longitudinal movement of the shaft 9 can be carried out, for example, using a guide sleeve installed in the housing 1 (not shown in the figures).

If the ring gear 12 is located on the end surface of the gear wheel 11, then the latter does not require axial adjustment, unlike, for example, bevel gears used to provide transmission of rotation with the perpendicular arrangement of the shafts. Therefore, the gear wheel 11 can provide a rupture of the kinematic connection between it and the gear wheel 13 when the handwheel is turned off and its guaranteed kinematic connection with the gear wheel 13 when the handwheel is turned on. In addition, in the case of bevel gears, to ensure a break in the kinematic connection between the handwheel and the rest of the electric drive, additional kinematic links would be required to complicate the handwheel. The advantage of the gear wheel 11 with the ring gear 12 located on its end surface in front of the bevel gears is also the simplicity of its manufacture.

A compression spring 14 is located on the shaft 9 of the handwheel 14. The spring 14 is installed with the possibility of compression during the longitudinal movement of the shaft 9 of the handwheel towards the shaft 7 of the electric motor 3. Compression of the spring 14 can be ensured,

for example, due to the stop (not indicated in the figures) for the spring 14 located in the wall of the housing 1, on the one hand, and due to the stop of the spring 14 in the handle for rotation 10 on the other hand.

The device operates as follows.

When a signal is received about the change in the set pressure of the medium in the pipeline to the regulating body 4, the latter includes an electric motor 3. The shaft 7 of the electric motor 3 drives the input link 6 of the gearbox 5. From the input link 6, the movement in the gearbox 5 is transmitted to its output link 8, which is opposite holes 2 in the housing 1 of the claimed drive. When installing an electric drive in the pipeline, the output link 8 is kinematically connected to a rotary valve shutter (not shown in the figures), which regulates the pressure of the working medium of the pipeline. The shutter rotates until the pressure in the pipeline reaches the set value. After that, the regulatory body 4 turns off the electric motor 3. The electric drive stops. The shutter stops turning.

If it is necessary to manually adjust the positions of the links of the transmission mechanism of the electric drive to verify the correct operation after assembly of the electric drive, as well as to check the operability of the electric drive and valve links, for example, after installing them on the pipeline, a manual override is used. To do this, press the handle to rotate 10 manual understudy in

towards the shaft 7 of the electric motor 3. In this case, the spring 14 is compressed. The handle 10 is pressed until the gear 13 located on the shaft 9 of the handwheel, reaches the gear 11 on the shaft 7 of the electric motor 3 and engages with it, forming a kinematic connection. After that, without stopping pressing the handle 10, they begin to rotate it. When the handle 10 is rotated, the rotational movement is transmitted along the chain: shaft 9 of the handwheel, gear 13 on the shaft 9, gear 11 on the shaft 7 of the electric motor 3, shaft 7 connected to the input link 6 of the gearbox 5, gearbox 5, output link 8 of the gearbox 5 , a rotary shutter of the valve kinematically connected to the gearbox 5. After completing work with the handwheel, release the handle for rotation 10. The shaft 9 of the handwheel, together with the handle 10 and gear 13 mounted on it, returns to its original position under the action of the expanding p dinners 14. The gear wheel 13 and the gear 11 are disconnected. The handwheel is turned off.

Thus, in comparison with the closest analogue in the claimed electric drive with a manual backup for a rotary valve shutter, which regulates the pressure in the pipeline in automatic mode, the kinematic scheme of its manual backup is simplified and is configured to disconnect from the electric drive when the operator stops working with it.

Claims (1)

An electric actuator with a manual backup for a rotary valve shutter that controls the pressure in the pipeline in automatic mode, comprising a housing with a hole, an electric motor with a regulating body located in the housing, a gearbox, the input link of which is kinematically connected to the motor shaft, and the output link is opposite the hole in the housing, manual backup, including a shaft and a handle for rotating the shaft and made with the possibility of kinematic connection and disconnection with an electric drive with a longitudinal shift a handwheel shaft, characterized in that the handwheel shaft is perpendicular to the motor shaft, a gear wheel is fixedly mounted on the handwheel shaft, a gear wheel is fixedly mounted on the motor shaft, the gear ring of which is located on its end surface and is kinematically connected to the gear a wheel on the shaft of the handwheel with a longitudinal movement of the shaft of the handwheel in the direction of the shaft of the electric motor, and on the shaft of the handwheel is located a compression spring installed with the possibility of compression during the longitudinal movement of the shaft of the handwheel towards the shaft of the electric motor.