A shunt release with manual operation capability

Abstract

The invention discloses a shunt release with manual operation capability, which is composed of a supporting part and a moving part, wherein the supporting part is mounted on a circuit breaker frame, and the moving part is mounted on the supporting part; wherein the supporting part comprises a rear shell, a middle shell, a front shell, a coil bracket, a coil and a shaft sleeve, and the moving part comprises a fork-shaped rod, a compression spring, a moving iron core, a pull rod, a push plate and a handle; the shunt release with manual operation capability of the invention has both manual and electric operation functions, has the characteristics of modularization, and solves the problems that the shunt release of the circuit breaker has a single function, the circuit breaker mechanism is dispersed and complicated, the installation and debugging are inconvenient, and the production cost is high.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit breakers, and in particular relates to a shunt release with manual operation capability. Background Art

[0002] As a component of the circuit breaker control circuit, the shunt release is often used to perform the circuit breaker opening operation. During the installation, commissioning and use of the circuit breaker, the circuit breaker is often required to have the ability to manually open the circuit in a non-powered state.

[0003] Usually, when designing a circuit breaker, the manual tripping mechanism is often independent of other components of the circuit breaker to avoid mutual influence and malfunction under conditions such as vibration and impact. This will result in a large number of scattered circuit breaker components, complex mechanisms, and large volumes, which will bring difficulties to the installation and commissioning of the circuit breaker.

[0004] As the system has increasingly stringent requirements on circuit breaker size and higher requirements on reliability and maintainability, it is crucial to reconstruct the manual tripping mechanism and shunt release with opening function.

[0005] The existing shunt release has only one function, that is, to control the forward and backward movement of the operating shaft when powered on. Summary of the invention

[0006] The purpose of the present invention is to overcome the problems of existing circuit breaker shunt releases and manual tripping mechanisms, such as single function, scattered and complex mechanisms, large size, inconvenient installation and maintenance, and high production cost, and to provide a shunt release with manual operation capability, which has both electric and manual operation functions.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a shunt release with manual operation capability, comprising a support part fixedly mounted on a circuit breaker frame and a moving part movably mounted on the support part; the support part comprises a front shell, a middle shell and a rear shell connected front and back, a coil is mounted in the rear shell through a coil bracket; the moving part comprises a moving iron core and a fork rod and a pull rod inserted on the moving iron core front and back, a circuit breaker release plate is mounted on the fork rod, and a pull rod located at the circuit breaker release plate is mounted at the end of the fork rod The first pin at the rear, the moving iron core is installed in the front shell and the middle shell, and a shaft sleeve is also arranged between the middle shell and the moving iron core. The moving iron core can move along the axis direction of the shaft sleeve after matching with the shaft hole of the shaft sleeve. The rear shell is sleeved on the pull rod, and a compression spring and a gasket sleeved on the fork rod are arranged between the front shell and the circuit breaker trip plate. A handle is movably installed on the rear shell through the second pin, and the bottom end of the handle is sleeved on the pull rod. A push plate located behind the bottom end of the handle is installed on the pull rod, and an open pin for limiting the push plate is installed at the end of the pull rod.

[0008] The fork-shaped rod of the shunt release with manual operation capability comprises a thick end and a thin end connected in sequence, a circuit breaker trip plate and a compression spring are respectively arranged at the thick end and the thin end, the gasket is arranged at the thin end and abuts against the thick end, and the length of the thick end is greater than the width of the circuit breaker trip plate.

[0009] The rear shell of the shunt release with manual operation capability is fixed to the middle shell by a first screw, and the front shell is fixed to the middle shell by a second screw.

[0010] The shunt release with manual operation capability has a coil support sleeved on the rear shell, and its axial movement is limited by the middle shell and the rear shell, and the coil is wound on the coil support.

[0011] The shaft sleeve of the shunt release with manual operation capability is installed in the middle shell hole by interference fit.

[0012] When the coil of the shunt release of the present invention is not energized, the fork-shaped rod will drive the moving iron core to move to a position close to the front shell under the action of the compression spring, and the first pin is not in contact with the circuit breaker trip plate; when the coil is energized, the magnetic field formed by the rear shell and the middle shell attracts the moving iron core to move toward the rear shell, and the first pin on the fork-shaped rod will hit the circuit breaker trip plate, so that the circuit breaker is opened; in addition, the handle can be pushed to rotate, and the lower end of the handle squeezes the push plate, driving the fork-shaped rod to move so that the first pin hits the circuit breaker trip plate, thereby realizing the opening operation.

[0013] Therefore, compared with the existing known technology, the present invention has the following significant effects:

[0014] The present invention not only has the functions of a general shunt release, but also can control the forward and backward movement of the operating shaft by a handle in a non-powered state. The structure is modular and easy to install, the volume is small, the production cost is reduced, and malfunction can be effectively prevented in environments such as vibration and impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the initial position of the structure of the present invention;

[0016] Figure 2 It is a schematic cross-sectional view of the structure of the present invention;

[0017] Figure 3 is a top view schematic diagram of the present invention;

[0018] Figure 4 It is a schematic cross-sectional view of the structure of the present invention during manual operation;

[0019] Figure 5 It is a schematic cross-sectional view of the structure of the present invention during electronic control.

[0020] The figures are marked as follows: 1—support part, 2—moving part, 10—circuit breaker trip plate, 11—rear shell, 111—first screw, 12—middle shell, 121—second screw, 13—front shell, 14—coil bracket, 15—coil, 16—bushing, 21—fork rod, 211—first pin, 22—compression spring, 221—gasket, 23—moving iron core, 24—pull rod, 25—push plate, 251—cotter pin, 26—handle, 261—second pin. DETAILED DESCRIPTION

[0021] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0022] The present invention belongs to the field of circuit breakers and has the function of controlling the opening of circuit breakers. Based on modular design, the shunt release of the present invention is composed of a supporting part 1 and a moving part 2. Figure 1 The support part 1 is mounted on the circuit breaker frame, the moving part 2 is movably mounted on the support part 1, and the shunt release can be mounted on the circuit breaker as a modular structure to control the movement of the circuit breaker trip plate.

[0023] See also Figure 2 , Figure 3 As shown, the support part 1 includes a rear shell 11, a middle shell 12, a front shell 13, a coil support 14, a coil 15 and a sleeve 16. The rear shell 11 is fixed to the middle shell 12 by a first screw 111, and the front shell 13 is fixed to the middle shell 12 by a second screw 121. The coil support 14 is sleeved on the rear shell 11, and its axial movement is limited by the middle shell 12 and the rear shell 11. The coil 15 is wound on the coil support 14, and the sleeve 16 is installed in the hole of the middle shell 12 by interference fit.

[0024] The moving part 2 includes a fork rod 21, a compression spring 22, a moving iron core 23, a pull rod 24, a push plate 25 and a handle 26. One end of the fork rod 21 is equipped with a first pin 211, and the other end is fixedly installed on the moving iron core 23. The compression spring 22 is sleeved on the fork rod 21, one end is tightly pressed on the gasket 221, and the other end is tightly pressed on the front shell 13. The moving iron core 23 cooperates with the axial hole of the sleeve 16 and can move along the axial direction of the sleeve 16. Its axial movement distance is limited by the front shell 13 and the rear shell 11. The pull rod 24 is fixedly installed on the moving iron core 23 and passes through the hole in the center of the rear shell 11. The push plate 25 is sleeved on the pull rod 24. The handle 26 is movably installed on the rear shell 11 through the second pin 261 and can rotate around the second pin 261.

[0025] See also Figure 3 , Figure 4 and Figure 5As shown, the space formed by the fork-shaped rod 21 and the first pin 211 is mounted on the circuit breaker trip plate 10. When the coil 15 is not energized, the fork-shaped rod 21 drives the moving iron core 23 to move to a position close to the front shell 13 under the action of the compression spring 22. At this time, the first pin 211 is not in contact with the circuit breaker trip plate 10. When the coil 15 is energized, the magnetic field formed by the rear shell 11 and the middle shell 12 attracts the moving iron core 23 to move toward the rear shell 11, and the first pin 211 on the fork-shaped rod 21 hits the circuit breaker trip plate 10, so that the circuit breaker is opened.

[0026] When the circuit breaker needs to be opened manually, the handle 26 can be pushed to rotate, the lower end of the handle 26 squeezes the push plate 25, and drives the fork rod 21 to move through the cotter pin 251 fixed on the pull rod 24, so that the first pin 211 hits the circuit breaker trip plate 10 to achieve the opening operation.

[0027] The circuit breaker trip plate 10 and the compression spring 22 are respectively arranged at the thick end and the thin end, the gasket 221 is arranged at the thin end and abuts against the thick end, and the length of the thick end is greater than the width of the circuit breaker trip plate. In this way, an idle stroke is formed between the fork rod 21 and the circuit breaker trip plate 10. The compression spring 22 is in a compressed state at the initial position, and there is an idle stroke between the fork rod 21 and the circuit breaker trip plate 10. When the shunt release is vibrated or impacted, the fork rod 21 compresses the compression spring 22 to absorb the energy of the vibration or impact, so that the first pin 211 on the fork rod 21 cannot contact the circuit breaker trip plate 10, effectively preventing the shunt release from malfunctioning under vibration and impact conditions.

[0028] The present invention adopts modular design, has the characteristics of modularization, small size, convenient installation and debugging, solves the problems of single function of circuit breaker shunt release, scattered and complex circuit breaker mechanism, inconvenient installation and debugging, and high production cost, reduces production cost, and can effectively prevent malfunction under vibration, impact and other environments. The structure also effectively prevents malfunction of the shunt release under vibration and impact environment by controlling the spring force and idle travel of the mechanism.

[0029] The above embodiments are only illustrative of the principles and effects of the present invention, as well as some embodiments of its application. For those skilled in the art, several modifications and improvements may be made without departing from the creative concept of the present invention, and all of these belong to the protection scope of the present invention.

Claims

1. A shunt release with manual operation capability, characterized in that: It comprises a supporting part (1) and a moving part (2) movably mounted on the supporting part (1); The support part (1) comprises a front shell (13), a middle shell (12) and a rear shell (11) connected front and rear, and a coil (15) is installed in the rear shell (11) via a coil bracket (14); The moving part (2) comprises a moving iron core (23) and a fork-shaped rod (21) and a pull rod (24) connected to the moving iron core (23); a circuit breaker trip plate (10) is mounted on the fork-shaped rod (21); a first pin (211) located behind the circuit breaker trip plate (10) is mounted at the end of the fork-shaped rod (21); the moving iron core (23) is mounted in the front shell (13) and the middle shell (12); a shaft sleeve (16) is further provided between the middle shell (12) and the moving iron core (23); the rear shell (11) is sleeved on the pull rod (24); a compression spring (22) and a gasket (221) sleeved on the fork-shaped rod (21) are provided between the front shell (13) and the circuit breaker trip plate (10); a second pin (211) is provided on the rear shell (11) to release the circuit breaker trip plate (10); 261) is movably provided with a handle (26), the bottom end of the handle (26) is sleeved on the pull rod (24), a push plate (25) is installed on the pull rod (24) and is located behind the bottom end of the handle (26), and a cotter pin (251) is installed at the end of the pull rod (24) to limit the push plate (25); the fork-shaped rod (21) includes a thick end and a thin end connected in sequence, the circuit breaker trip plate (10) and the compression spring (22) are respectively arranged at the thick end and the thin end, the gasket (221) is arranged at the thin end and abuts against the thick end, and the length of the thick end is greater than the width of the circuit breaker trip plate (10); the rear shell (11) is fixed to the middle shell (12) by a first screw (111), and the front shell (13) is fixed to the middle shell (12) by a second screw (121).

2. A shunt release with manual operation capability according to claim 1, characterized in that: The coil support (14) is sleeved on the rear housing (11), and the coil (15) is wound on the coil support (14).

3. A shunt release with manual operation capability according to claim 1, characterized in that: The shaft sleeve (16) is installed in the hole of the middle shell (12) with an interference fit.

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