CN214889238U

CN214889238U - Straight stroke valve actuator

Info

Publication number: CN214889238U
Application number: CN202121631693.6U
Authority: CN
Inventors: 靳义坤
Original assignee: Changzhou Chenglei Valve Technology Co ltd
Current assignee: Changzhou Chenglei Valve Technology Co ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2021-11-26
Anticipated expiration: 2031-07-16

Abstract

The utility model discloses a straight stroke valve actuator belongs to valve actuator technical field. The base on the box is mainly included to the fixed mounting, can rotationally install the screw-nut on the base, lead screw and guide bar on the screw-nut are installed in the cooperation, fixed mounting has the slider on the lead screw, guide bar fixed connection is on the base, the axial sliding connection of slider along the lead screw is on the guide bar in addition, straight stroke mechanism still includes the switch assembly who is connected with the control circuit of executor, be equipped with the installation piece on the switch assembly, install on the guide bar installation piece slidable, the switch assembly is equipped with two, two switch assemblies are located the both sides of slider respectively, the switch assembly is used for stopping the executor when slider and switch assembly contact. The utility model discloses a straight stroke valve actuator has more reliable spacing design, can reduce the probability of unconventional loss.

Description

Straight stroke valve actuator

Technical Field

The utility model relates to a valve actuator technical field, concretely relates to straight stroke valve actuator.

Background

The linear motion valve cannot be driven by a rotary valve actuator, and a linear motion valve actuator with a linear motion mechanism is required. The existing straight stroke valve actuator realizes stroke control through an input control program, when the program is disordered or a screw rod is deflected when being reset to zero, the stroke of the screw rod in a straight stroke mechanism is different from a preset stroke, and an unforeseen result is caused.

It is therefore desirable to provide a straight-stroke valve actuator that addresses the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the straight-stroke valve actuator has a more reliable limiting design, and the probability of unconventional loss of the straight-stroke valve actuator can be reduced.

The utility model provides a technical scheme that its technical problem adopted is: a straight stroke valve actuator comprises an actuator and a straight stroke mechanism, wherein the actuator comprises a box body and an output shaft; the straight stroke mechanism comprises a fixed mounting base on the box body, a screw nut and a guide rod, wherein the screw nut and the guide rod are rotatably mounted on the base, the guide rod is fixedly mounted on the screw nut, the slide block is fixedly connected onto the base, the slide block is connected onto the guide rod in a sliding mode in the axial direction, the straight stroke mechanism further comprises a switch assembly connected with a control circuit of the actuator, a mounting block is arranged on the switch assembly, the mounting block is slidably mounted on the guide rod, the switch assembly is provided with two switch assemblies, the two switch assemblies are respectively located on two sides of the slide block, and the switch assembly is used for closing the actuator when the slide block is in contact with the switch assembly.

Furthermore, a through hole is formed in the sliding block, a first threaded hole is further formed in the sliding block, the first threaded hole penetrates through the through hole, a first screw installed in the first threaded hole in a matched mode is further arranged on the sliding block, the sliding block is sleeved on the lead screw through the through hole, and the first screw is used for being matched with the first threaded hole to position the sliding block on the lead screw.

Furthermore, the sliding block is provided with a circular arc sliding groove.

Furthermore, two pairs of sliding grooves are arranged, and each pair of sliding grooves are respectively arranged on two opposite side surfaces of the sliding block.

Furthermore, the number of the guide rods is four corresponding to the sliding grooves in the sliding block, the four guide rods are distributed around the screw rod in a surrounding mode, and the sliding grooves in the sliding block are in one-to-one corresponding sliding support on the cylindrical surfaces of the guide rods.

Furthermore, a sliding hole is formed in the mounting block, the mounting block is slidably mounted on the guide rod through the sliding hole, a second threaded hole penetrating into the sliding hole is formed in the mounting block, a second screw installed in the second threaded hole in a matched mode is further arranged on the mounting block, and the second screw is used for being matched with the second threaded hole to position the mounting block on the guide rod.

Further, the switch assembly is a microswitch.

Further, the actuator is a rotary valve actuator.

The utility model has the advantages that: fixed mounting has the slider on the lead screw, guide bar fixed connection is on the base, the axial sliding connection of slider along the lead screw is on the guide bar in addition, straight stroke mechanism still includes the switch assembly of being connected with the control circuit of executor, be equipped with the installation piece on the switch assembly, install on the guide bar installation piece slidable, the switch assembly is equipped with two, two switch assemblies are located the both sides of slider respectively, the switch assembly is used for stopping the executor when slider and switch assembly contact, thereby make this straight stroke valve executor have more reliable spacing, can effectively reduce the unconventional loss of straight stroke valve executor, and the position of axial adjustment switch assembly through along the guide bar, thereby can conveniently adjust the stroke range of lead screw according to actual demand.

Drawings

The present invention will be further explained with reference to the drawings and examples.

In the figure: fig. 1 is a schematic perspective view of a straight stroke valve actuator according to the present invention;

FIG. 2 is a cross-sectional view of the straight-stroke valve actuator of FIG. 1;

FIG. 3 is a perspective view of the stroking mechanism of the stroking valve actuator of FIG. 1;

FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 3;

FIG. 5 is a schematic structural diagram of a slider in the linear motion mechanism;

FIG. 6 is a schematic structural diagram of a switch assembly in the linear motion mechanism;

100. an actuator; 110. a box body; 120. a motor; 130. an output shaft; 131. a worm gear; 140. a worm; 200. a straight stroke mechanism; 210. a base; 220. a feed screw nut; 230. a screw rod; 231. a slider; 2311. a chute; 2312. a through hole; 2313. a first threaded hole; 240. a guide bar; 241. a stabilizing plate; 250. a switch assembly; 251. mounting blocks; 2511. a slide hole; 2512. and a second threaded hole.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

As shown in fig. 1, the present invention provides a straight stroke valve actuator, which includes an actuator 100 and a straight stroke mechanism 200 for converting the circular motion of the actuator 100 into a straight motion.

Referring to fig. 2, the actuator 100 is a rotary valve actuator, the actuator 100 includes a box 110 and an output shaft 130 rotatably disposed in the box 110, the output shaft 130 is used for outputting torque to drive the straight stroke mechanism 200, the output shaft 130 is a hollow structure, and more precisely, a worm wheel 131 for driving the output shaft 130 to rotate on the box 110 is mounted on the output shaft 130.

In a specific embodiment, the actuator 100 further includes a motor 120 and a worm 140, the motor 120 is fixedly mounted on the housing 110, the worm 140 is rotatably mounted in the housing 110, the worm 140 is drivingly connected to the output shaft 130, more specifically, the worm 140 is engaged with the worm wheel 131 on the output shaft 130, and the output end of the motor 120 is fixedly connected to one end of the worm 140. Therefore, the worm 140 can be driven to drive the output shaft 130 to rotate on the box 110 by the torque output of the motor, so that the actuator 100 can output the torque.

As shown in fig. 3, the straight stroke mechanism 200 includes a base 210, a lead screw nut 220, and a lead screw 230.

Referring to fig. 4, a cylindrical cavity is formed in the center of the base 210 along the axial direction of the base 210, the base 210 is fixedly mounted on the box 110 on the actuator 100, and in this embodiment, the cylindrical cavity on the base 210 is coaxially arranged with the output shaft 130 on the actuator 100, the lead screw nut 220 is rotatably mounted on the base 210, and the lead screw nut 220 is coaxially arranged with the output shaft 130, more precisely, a ball bearing (not labeled in the figure) is further mounted in the cylindrical cavity on the base 210, and the lead screw nut 220 is rotatably mounted on the ball bearing on the base 210; referring to fig. 2, the lead screw nut 220 is connected to the output shaft 130, and more specifically, in the present embodiment, the lead screw nut 220 is connected to the output shaft 130 through the clutch pawls disposed on the opposite end surfaces, and it can be understood that the lead screw nut 220 and the output shaft 130 may also be connected through a coupling, a spline, or the like.

The screw 230 is inserted into the screw nut 220, and the screw 230 is matched with the screw nut 220 through threads; in addition, the sliding block 231 is fixedly installed on the screw rod 230, in the present embodiment, the sliding block 231 is in a plate-shaped structure, a through hole 2312 is formed in the middle of the sliding block 231 along the thickness direction of the sliding block 231, a first threaded hole 2313 is further formed in the sliding block 231, and the first threaded hole 2313 penetrates through the through hole 2312, it can be understood that a first screw (not shown) installed in the first threaded hole 2313 in a matching manner is further arranged on the sliding block 231, and the first screw is used for matching with the first threaded hole 2313 to position the sliding block 231 on the screw rod 230, so that the sliding block 231 is sleeved on the screw rod 230 through the through hole 2312 and is abutted against the screw rod 230 through the first screw to enable the sliding block 231 to be detachably and fixedly installed on the screw rod 230; in addition, the slider 231 is further provided with two pairs of circular-arc-shaped sliding grooves 2311, and in the present embodiment, each pair of sliding grooves 2311 is respectively arranged on two opposite side surfaces of the slider 231.

The linear stroke mechanism 200 further includes a guide rod 240, one end of the guide rod 240 is fixedly installed on the base 210, and the length direction of the guide rod 240 is parallel to the length direction of the screw 230. In the present embodiment, the number of the guide rods 240 is four corresponding to the sliding slots 2311 on the sliding block 231, and the four guide rods 240 are distributed around the screw 230; in the present embodiment, in order to make the guide rods 240 more stable, a stabilizing plate 241 is fixedly installed at one end of the plurality of guide rods 240 away from the base 210, and an avoiding hole (not shown) is formed in the stabilizing plate 241 along the axial direction of the screw rod 230, and the avoiding hole is used for avoiding the screw rod 230.

In addition, the slider 231 is slidably connected to the guide rods 240, and in the present embodiment, the slide grooves 2311 of the slider 231 are slidably abutted against the cylindrical surfaces of the plurality of guide rods 240 in a one-to-one correspondence. Therefore, the guide rod 240 can limit the screw rod 230 to do circular motion relative to the screw nut 220, so that the screw rod 230 can be driven to do linear motion when the screw nut 220 rotates, in other words, the circular motion of the screw nut 220 is converted into the linear motion, and the guide rod 240 can also realize the effect of stable guide on the sliding block 231 and the fixedly connected screw rod 230, and relieve the shaking generated when the screw rod 230 moves.

The linear travel mechanism 200 further includes a switch assembly 250, in this embodiment, the switch assembly 250 is a micro switch, and the switch assembly 250 is connected to the control circuit of the actuator 100; the switch assembly 250 is fixedly provided with a mounting block 251, the mounting block 251 is provided with a sliding hole 2511, the mounting block 251 is further provided with a second threaded hole 2512 penetrating into the sliding hole 2511, the mounting block 251 is further provided with a second screw (not shown) matched and mounted in the second threaded hole 2512, the second screw is used for being matched with the second threaded hole 2512 to position the mounting block 251 on the guide rod 240, the mounting block 251 is slidably mounted on the guide rod 240 through the sliding hole 2511, so that the switch assembly 250 can slide on the guide rod 240 along the axial direction of the guide rod 240, and the second screw is abutted on the guide rod 240 as required to position the switch assembly 250 at a set position on the guide rod 240.

Two switch assemblies 250 are symmetrically arranged, the two switch assemblies 250 are respectively positioned at two sides of the sliding block 231, and the contacts on the switch assemblies 250 are opposite to the end surface of the sliding block 231. Therefore, when the screw 230 drives the slider 231 to do linear motion and contact the switch assembly 250, the actuator 100 is controlled to stop rotating by the control circuit of the actuator 100, so as to avoid unexpected consequences caused by the over-travel motion of the screw 230; and the position of the switch assembly 250 on the guide rod 240 can be adjusted through the mounting block 251, so that the stroke range of the screw 230 can be conveniently adjusted according to actual requirements.

Therefore, the utility model discloses straight stroke valve actuator has following beneficial effect at least:

the linear motion valve actuator comprises a guide rod 230, a guide rod 240, a guide assembly 250, a mounting block 251 and two switch assemblies 250, wherein the guide rod 240 is fixedly arranged on the guide rod 231, the guide rod 240 is fixedly connected to the base 210, the slide block 231 is arranged on the guide rod 240 in a sliding mode along the axial direction of the guide rod 230, the switch assemblies 250 are connected with a control circuit of the actuator 100, the mounting block 251 is arranged on the switch assemblies 250 and is arranged on the guide rod 240 in a sliding mode, the two switch assemblies 250 are respectively arranged on two sides of the slide block 231, and the switch assemblies 250 are used for stopping the actuator 100 when the slide block 231 is in contact with the switch assemblies 250, so that the linear motion valve actuator has more reliable limiting, irregular loss of the linear motion valve actuator can be effectively reduced, and the stroke range of the guide rod 230 can be conveniently adjusted according to actual requirements by adjusting the positions of the switch assemblies 250 along the axial direction of the guide rod 240.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a straight stroke valve executor, includes executor and straight stroke mechanism, the executor includes box and output shaft, its characterized in that: the straight stroke mechanism comprises a fixed mounting base on the box body, a screw nut and a guide rod, wherein the screw nut and the guide rod are rotatably mounted on the base, the guide rod is fixedly mounted on the screw nut, the slide block is connected to the guide rod in a sliding mode in the axial direction, the guide rod is fixedly connected to the base, the slide block is connected to the guide rod in a sliding mode in the axial direction, the straight stroke mechanism further comprises a switch assembly connected with a control circuit of the actuator, a mounting block is arranged on the switch assembly, the mounting block is slidably mounted on the guide rod, the switch assembly is provided with two switch assemblies, the two switch assemblies are respectively located on two sides of the slide block, and the switch assembly is used for closing the actuator when the slide block is in contact with the switch assembly.

2. A straight-stroke valve actuator as claimed in claim 1, wherein: the screw rod is characterized in that a through hole is formed in the sliding block, a first threaded hole is further formed in the sliding block and penetrates through the through hole, a first screw which is installed in the first threaded hole in a matched mode is further arranged on the sliding block, the sliding block is sleeved on the screw rod through the through hole, and the first screw is used for being matched with the first threaded hole to position the sliding block on the screw rod.

3. A straight-stroke valve actuator as claimed in claim 1, wherein: and the sliding block is provided with a circular arc-shaped sliding groove.

4. A straight-stroke valve actuator as claimed in claim 3, wherein: the sliding grooves are provided with two pairs, and each pair of sliding grooves is respectively arranged on two opposite side surfaces of the sliding block.

5. A straight-stroke valve actuator as claimed in claim 4, wherein: the guide rods are provided with four sliding grooves corresponding to the sliding blocks, the four guide rods are distributed around the screw rod in a surrounding mode, and the sliding grooves in the sliding blocks are in one-to-one corresponding sliding support on the cylindrical surfaces of the guide rods.

6. A straight-stroke valve actuator as claimed in claim 1, wherein: the mounting block is provided with a sliding hole and can be slidably mounted on the guide rod through the sliding hole, the mounting block is provided with a second threaded hole penetrating into the sliding hole, the mounting block is further provided with a second screw which is mounted in the second threaded hole in a matched mode, and the second screw is used for being matched with the second threaded hole to position the mounting block on the guide rod.

7. A straight-stroke valve actuator as claimed in claim 1, wherein: the switch assembly is a microswitch.

8. A straight-stroke valve actuator as claimed in claim 1, wherein: the actuator is a rotary valve actuator.