CN208381444U - A kind of limit switch structure of electric blowdown valve driver - Google Patents

Abstract

The utility model relates to a kind of limit switch structures of electric blowdown valve driver.It includes two limit switches, pin and upper clamp plate and lower clamp plate, is fixed by the connecting rod between upper clamp plate and lower clamp plate；It is equipped with gear between upper clamp plate and lower clamp plate, is fixedly connected with output shaft at the center of gear, is equipped with the connecting hole in mating connection with valve body rotary shaft in the lower end of output shaft；Arc groove is additionally provided on upper clamp plate, two limit switches are installed in upper clamp plate upper end and are located at the end positions of arc groove, pin is fixedly connected on gear, the top of pin passes through arc groove and stretches out the upper surface of upper clamp plate, and with the rotation of gear, arcuately slot direction moves back and forth to control whether to touch limit switch pin.The utility model has the advantages of simple structure, is conducive to sealing, and it is small in size, light-weight, material consumption is few, installation dimension is small, easy to operate, easy realization fast opening and closing, and overall structure is stablized, long service life.

Description

A kind of limit switch structure of electric blowdown valve driver

Technical field

The utility model relates to a kind of limit switch structures of electric blowdown valve driver, belong to the skill of electronic valve actuator Art field.

Background technique

Electric blowdown valve refers to and drives gear rotation to open and close with ovable valve stem lifting implementation using motor driver Purpose.

Existing product is due to that after reaching position there are driver valve opening, cannot stop electricity in structure and technical limitation Machine power supply, influences electrical machinery life, and usage range is single, existing product is generally large in size, and is had in some pairs of volumes It is required that field, not only have the requirement of volume to all parts, also there is relatively high requirement to device power, thus there is an urgent need to A kind of volume is smaller, the driver of adaptive a variety of valve heads, and limit switch structure belongs to the nuclear structure of driver.

Utility model content

The purpose of the utility model is to overcome the above deficiencies in the existing technologies, and provide a kind of electric blowdown valve The limit switch structure of driver.

The technical scheme in the invention for solving the above technical problem is: a kind of limit of electric blowdown valve driver is opened Close structure comprising two limit switches, pin and upper clamp plate disposed in parallel and lower clamp plate, upper clamp plate and lower clamp plate it Between be fixed by the connecting rod；It is equipped with gear between the upper clamp plate and lower clamp plate, is fixedly connected at the center of the gear Output shaft, the upper and lower ends of the output shaft pass through bearing respectively and connect with upper clamp plate and lower clamp plate, under the output shaft End is equipped with the connecting hole in mating connection with valve body rotary shaft；Arc groove is additionally provided on upper clamp plate, two limit switches are pacified Mounted in upper clamp plate upper end and the end positions of arc groove are located at, pin hole is equipped on gear, the bottom of the pin is inserted into The pin hole is simultaneously fixedly connected with gear, and the top of the pin passes through arc groove and stretches out the upper surface of upper clamp plate, pin with Arcuately slot direction moves back and forth to control whether to touch limit switch for the rotation of gear.

Further, the pin of the utility model includes upper and lower end, the upper and lower end it Between form ladder, and the radius of lower end is greater than the radius of pin hole.

Further, the pin hole of the utility model is equipped with internal screw thread, is additionally provided with boss in the upper end of the pin, The boss is equipped with the external screw thread in mating connection with the internal screw thread.

The utility model is compared with the prior art, and structure is simple, is conducive to sealing, and small in size, light-weight, material Consume less, installation dimension it is small, especially driving moment is small, easy to operate, easily realization fast opening and closing, and overall structure is stablized, and makes It is long with the service life.

Detailed description of the invention

Fig. 1 is the overlooking structure diagram of the utility model.

Fig. 2 is the A-A schematic cross-sectional view in Fig. 1.

Fig. 3 is in Fig. 2 to the further improved structural schematic diagram of pin.

Fig. 4 is in Fig. 3 to the further improved structural schematic diagram of pin.

In attached drawing: 1 is upper clamp plate, and 11 be arc groove, and 2 be lower clamp plate, and 3 be motor, and 4 be limit switch, and 5 be connecting rod, 6 To drive gear, 7 be driven gear, and 71 be pin hole, and 8 be output shaft, and 81 be connecting hole, and 82 be bearing, and 9 be pin, and 91 be upper End, 92 be lower end, and 93 be boss.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is pair The explanation of the utility model and the utility model is not limited to following embodiment.

Referring to figures 1-4, the present embodiment includes the motor 3 and limit switch 4 being installed on upper clamp plate 1, further include with it is upper The lower clamp plate 2 disposed in parallel of clamping plate 1, it is fixed by multiple connecting rods 5 between upper clamp plate 1 and lower clamp plate 2.

It is equipped with the driving gear 6 and driven gear 7 of the connection that cooperates between upper clamp plate 1 and lower clamp plate 2, drives gear 6 are driven by motor 3, are fixedly connected with output shaft 8 at the center of driven gear 7, the upper and lower ends of output shaft 8 pass through bearing respectively 82 connect with upper clamp plate 1 and lower clamp plate 2, are equipped with the connecting hole 81 in mating connection with valve body rotary shaft in the lower end of output shaft 8.

Arc groove 11 is additionally provided on upper clamp plate 1, the present embodiment includes two limit switches 4, is located at arc groove 11 End positions.

Pin hole 71 is additionally provided on driven gear 7, the present embodiment further includes a pin 9, and pin hole is inserted into the bottom of the pin 9 It 71 and is fixedly connected with driven gear 7, the top of the pin 9 passes through arc groove 11 and stretches out the upper surface of upper clamp plate 1, pin 9 With driven gear 7 rotation arcuately 11 direction of slot move back and forth with control whether touch two limit switches 4.

The working process and principle of the present embodiment are as follows: when motor 3 is run, driving gear 6 is rotated, and drives 7 turns of driven gear It is dynamic, so that arcuately slot 11 is mobile for pin 9, when pin 9 encounters limit switch 4, and limit switch 4 is disconnected, motor 3 is just Power-off.

The present embodiment be also contemplated that if output shaft 8 do not load or load it is too small, motor 3 power off after due to inertia Effect, pin 9 will continue to run and strike on upper clamp plate 1.Gear generallys use powder metallurgical gear, and works as and encounter powder When metallurgical gear hardness is inadequate, pin 9 can make the pin hole 71 on driven gear 7 at ellipse due to hitting upper clamp plate 1 repeatedly Type long hole and loosen, eventually leading to pin 9 falls off, and drops out above upper clamp plate 1.Therefore, the utility model patent is by pin 9 Structure is further optimized, as shown in figure 3, pin 9 is divided for upper end 91 and lower end 92, upper end 91 and lower end 92 Between form ladder, and the radius of lower end 92 is greater than the radius of pin hole 71, designs with this configuration, even if pin 9 and passive There is part loosening between gear 7, therefore pin 9 will not be made to fall, increase the service life of the electric blowdown valve driver. On this basis, also internal screw thread is arranged in the inside of pin hole 71 in the present inventor, and a boss is arranged in the upper end of pin 9 91 93, which is equipped with the external screw thread matched with internal screw thread, designs with this configuration, passes through spiral shell between pin 9 and driven gear 7 Line connection, keeps pin 9 and the structure of driven gear 7 more stable, as shown in Figure 4.

Although the utility model is disclosed as above with embodiment, its protection model being not intended to limit the utility model It encloses, any technical staff for being familiar with this technology, made change and profit in the conception and scope for not departing from the utility model Decorations, all should belong to the protection range of the utility model.

Claims (3)

1. a kind of limit switch structure of electric blowdown valve driver, it is characterised in that: including two limit switches, pins, with And upper clamp plate disposed in parallel and lower clamp plate, it is fixed by the connecting rod between upper clamp plate and lower clamp plate；In the upper clamp plate under It is equipped with gear between clamping plate, is fixedly connected with output shaft at the center of the gear, the upper and lower ends of the output shaft are led to respectively It crosses bearing to connect with upper clamp plate and lower clamp plate, is equipped with the connection in mating connection with valve body rotary shaft in the lower end of the output shaft Hole；Arc groove is additionally provided on upper clamp plate, two limit switches are installed in upper clamp plate upper end and are located at the two of arc groove End position is equipped with pin hole on gear, and the bottom of the pin is inserted into the pin hole and is fixedly connected with gear, the pin Top passes through arc groove and stretches out the upper surface of upper clamp plate, and with the rotation of gear, arcuately slot direction moves back and forth to control pin Whether limit switch is touched.

2. the limit switch structure of electric blowdown valve driver according to claim 1, it is characterised in that: the pin packet Upper and lower end is included, forms ladder between the upper and lower end, and the radius of lower end is greater than the radius of pin hole.

3. the limit switch structure of electric blowdown valve driver according to claim 2, it is characterised in that: the pin hole is set There is internal screw thread, be additionally provided with boss in the upper end of the pin, the boss is equipped with and in mating connection outer of the internal screw thread Screw thread.