CN112038192A

CN112038192A - Interlocking structure of change-over switch

Info

Publication number: CN112038192A
Application number: CN202010957015.2A
Authority: CN
Inventors: 冯沛兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2020-12-04

Abstract

The invention provides an interlocking structure of a change-over switch, which comprises a sealing tube, a first piston, a piston rod and a volume variable component arranged in the sealing tube, wherein liquid is filled in the sealing tube, the volume variable component comprises a shell, a phase change expansion substance and a second piston, two independent and mutually isolated chambers are arranged on the inner wall of the shell, one end of each chamber is closed, and the other end of each chamber is opened. The invention has simple structure and low cost, can avoid the problem that two circuit breakers of the change-over switch are switched on simultaneously, and can also lead the two circuit breakers of the change-over switch to be automatically switched off under the condition of high temperature.

Description

Interlocking structure of change-over switch

Technical Field

The invention relates to the technical field of electrical switches, in particular to an interlocking structure of a change-over switch.

Background

An interlock is a dual power transfer switch that is typically a mechanical device used to prevent two power sources (such as a utility power source and a backup power source) from being turned on at the same time. In the prior art, the interlocking structure of the dual-power transfer switch is mainly realized by interlocking the opening tripping rod of the common/standby power switch and the position of the main shaft of the standby/common power switch, and the interlocking structure has high cost and needs to be improved.

Disclosure of Invention

In order to solve the problem of higher cost of the existing transfer switch interlocking structure, the invention provides an interlocking structure of a transfer switch, which has the following specific technical scheme:

an interlocking structure of a change-over switch comprises a hollow sealing tube, a first piston, a piston rod and a volume variable component, wherein the first piston is connected with the inner walls of two ends of the sealing tube in a sliding and sealing mode, one end of the piston rod is movably inserted into the end portion of the sealing tube respectively and fixedly connected with the first piston, the sealing tube is filled with liquid, the volume variable component comprises a shell, a phase change expansion substance and a second piston, the inner wall of the shell is provided with two chambers which are independent from each other and isolated from each other, one end of each chamber is closed, one end of each chamber is opened, the second piston is connected with the inner wall of each chamber in a sliding and sealing mode, the phase change expansion substance is arranged between the inner wall of each chamber and the second piston, and the phase change expansion substance is configured to extend and drive the second piston to move towards the open end of each chamber when the temperature is higher than a preset temperature threshold value, and then the piston rod is driven to move away from the opening end of the sealing tube by driving the liquid.

Two the piston rod is connected with two way circuit breakers in the change over switch respectively, when one of them circuit breaker closing action, with carry out the closing action the circuit breaker is connected the piston rod will be toward being close to the inside direction removal of sealing tube, through liquid drive is connected with another circuit breaker the piston rod is toward keeping away from the inside direction removal of sealing tube to drive another circuit breaker and carry out the separating brake action. Through interlocking structure for one of them circuit breaker is when closing a floodgate the action, and another circuit breaker can be the separating brake action under the liquid effect, can avoid appearing two way circuit breakers of change over switch and close a floodgate simultaneously and lead to if the circuit short circuit or with the electrical apparatus overload burn out scheduling problem, whole interlocking structure simple structure, the cost is extremely low, and easily install the maintenance, be fit for promoting. When the temperature of the change-over switch rises and exceeds a preset temperature threshold value, the phase change expansion substance in the volume variable component is extended and drives the second piston to move towards the opening end of the chamber, and then the first piston and the piston rod are driven to move towards the direction far away from the opening end of the sealing tube by driving the liquid, so that the opening action of the two circuit breakers can be simultaneously realized.

That is to say, this interlocking structure not only can avoid appearing two way circuit breakers of change over switch and closing a floodgate simultaneously and leading to if the circuit short circuit or with the problem such as electric apparatus overload burnout, can also make two way circuit breakers of change over switch automatic separating brake under the high temperature condition, avoid because of the emergence of accident such as conflagration or electric shock that high temperature closed a floodgate and arouse, its simple structure, the cost is extremely low.

Optionally, the phase change expansion material is a cylindrical shape memory alloy.

Optionally, the phase change expanding substance is a memory spring.

Optionally, the housing is a circular tube, and the outer diameter of the circular tube is smaller than the outer diameter of the sealing tube.

Optionally, the round tube is made of an aluminum alloy material.

Optionally, the liquid is disposed between the two piston rods.

Optionally, the liquid is a lubricating oil.

Optionally, the sealing tube is of an inverted U-shaped structure.

Optionally, the sealed tube includes straight portion, establishes separately the first vertical portion and the vertical portion of second at straight portion both ends, first vertical portion with the vertical portion of second all with straight portion intercommunication.

Optionally, the variable volume member is located intermediate the straight portions of the gland.

The beneficial effects obtained by the invention comprise: the automatic switching-off device not only can avoid the problems of line short circuit or overload burning of an electric instrument and the like caused by simultaneous switching-on of two circuit breakers of the change-over switch, but also can enable the two circuit breakers of the change-over switch to be automatically switched off under the high-temperature condition, avoids the occurrence of accidents such as fire or electric shock caused by high-temperature switching-on, and is simple in structure and extremely low in cost.

Drawings

The present invention will be further understood from the following description taken in conjunction with the accompanying drawings, the emphasis instead being placed upon illustrating the principles of the embodiments.

Fig. 1 is a schematic structural diagram of an interlock structure of a transfer switch according to an embodiment of the present invention, when two circuit breakers are in an open state;

fig. 2 is a first schematic structural diagram of an interlocking structure of a transfer switch according to an embodiment of the present invention, when one circuit breaker is in an open state and the other circuit breaker is in a closed state;

fig. 3 is a schematic structural diagram ii of an interlocking structure of a transfer switch according to an embodiment of the present invention, when one circuit breaker is in an open state and the other circuit breaker is in a close state;

fig. 4 is a schematic structural diagram of a volume-variable component according to an embodiment of the present invention.

Description of reference numerals:

1. a sealing tube; 2. a first piston; 3. a piston rod; 4. a housing; 5. a phase change intumescent substance; 6. a second piston; 7. a first link; 8. a second link; 9. a third link; 10. a fourth link; 11. a first connecting plate; 12. a second connecting plate; 13. a coil spring; 14. a third piston; 15. and a stop block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other systems, methods, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms described above will be understood by those of ordinary skill in the art according to the specific circumstances.

The invention relates to an interlocking structure of a change-over switch, which explains the following embodiments according to the attached drawings:

the first embodiment is as follows:

as shown in fig. 1, 2 and 3, an interlock structure of a transfer switch includes a hollow sealed tube 1, a first piston 2 connected with inner walls of two ends of the sealed tube 1 in a sliding and sealing manner, and a piston rod 3 having one end respectively movably inserted into an end of the sealed tube 1 and fixedly connected with the first piston 2, wherein the sealed tube 1 is filled with a liquid, the interlock structure of the transfer switch further includes a volume variable component disposed in the sealed tube 1, the volume variable component includes a housing 4, a phase change expanding material 5 and a second piston 6, the inner wall of the housing 4 is provided with two independent and isolated chambers, one end of each chamber is closed, one end of each chamber is open, the second piston 6 is connected with the inner wall of the chamber in a sliding and sealing manner, the phase change expanding material 5 is disposed between the inner wall of the chamber and the second piston 6, and the phase change expanding material 5 is configured to extend and drive the second piston when a temperature is greater than a preset temperature threshold value 6 towards the open end of the chamber and thereby drives the piston rod 3 away from the open end of the gland 1 by driving the liquid.

Two piston rod 3 is connected with two way circuit breakers in the change over switch respectively, when one of them circuit breaker closing action, with carry out the closing action the circuit breaker is connected piston rod 3 will be toward being close to the inside direction removal of sealed tube 1, through liquid drive is connected with another circuit breaker piston rod 3 is toward keeping away from the inside direction removal of sealed tube 1 to drive another circuit breaker and carry out the separating brake action. Through interlocking structure for one of them circuit breaker is when closing a floodgate the action, and another circuit breaker can be the separating brake action under the liquid effect, can avoid appearing two way circuit breakers of change over switch and close a floodgate simultaneously and lead to if the circuit short circuit or with the electrical apparatus overload burn out scheduling problem, whole interlocking structure simple structure, the cost is extremely low, and easily install the maintenance, be fit for promoting. When the temperature of the change-over switch rises and exceeds a preset temperature threshold value, the phase change expansion substance 5 in the volume variable component is extended and drives the second piston 6 to move towards the opening end of the chamber, and then the first piston 2 and the piston rod 3 are driven to move towards the direction far away from the opening end of the sealing tube 1 by driving the liquid, so that the opening action of the two circuit breakers can be simultaneously realized.

In this example, since the components such as the circuit breaker, the toggle element, and the gear that realize the opening and closing actions of the two circuit breakers of the transfer switch are conventional technical means in the technical field, and the specific link relationship between the piston rod 3 and the circuit breaker, a person skilled in the art can set a suitable specific structure according to actual conditions, and thus the details are not described herein.

In one embodiment, the housing 4 is a circular tube having an outer diameter equal to or slightly smaller than the outer diameter of the sealing tube 1. The external diameter of pipe equals or slightly is less than the diameter of sealed tube 1, can guarantee when two way circuit breakers carry out divide-shut brake operation, but volume variable part removes in sealed tube 1, and then guarantees that the condition of closing a floodgate simultaneously can not appear in two way circuit breakers.

The housing 4 is made of an aluminum alloy material. The shell 4 is made of an aluminum alloy material, so that the phase change expansion substance 5 can better sense the temperature of the shell 4, the sealing tube 1 and even the change-over switch.

The liquid is arranged between the two piston rods 3, and the liquid is one of water, oil or a water-oil mixture. As a preferred technical solution, the liquid is oil, specifically lubricating oil or hydraulic oil.

As shown in fig. 1, 2 and 3, the sealing tube 1 is of an inverted U-shaped structure, the sealing tube 1 includes a straight portion, a first vertical portion and a second vertical portion separately provided at both ends of the straight portion, and both the first vertical portion and the second vertical portion are communicated with the straight portion. The straight portion level sets up, first vertical portion with the equal vertical downwardly setting of the vertical portion of second is in on the both ends of controlling of straight portion. The volume-variable member is provided in the hermetic tube 1 in the middle of the straight portion of the hermetic tube 1. The outer diameter of the first piston 2 is equal to or slightly larger than the inner diameter of the sealing tube 1. The first piston 2 can move up and down back and forth in the first vertical portion and the second vertical portion.

When the two circuit breakers are in an opening state, a preset distance is reserved between the two piston rods 3 and the end part of the end, closest to the sealing tube 1, of the sealing tube, so that when one circuit breaker is switched on and one of the piston rods 3 moves upwards, the other piston rod can move downwards or keep a downward movement trend under the action of the liquid, and the situation that the two piston rods 3 move upwards at the same time is avoided.

Example two:

In this example, the phase change expansion material 5 is a cylindrical shape memory alloy or a memory spring wound from a shape memory alloy, and has a shaft axis parallel to the shaft axis of the housing 4 and a characteristic of being elongated in the axial direction after being heated. When the temperature of the phase change expansion substance 5 exceeds a preset temperature threshold value, the phase change expansion substance is extended along the axial direction to push the second piston 6 to move towards the opening end of the cavity, so that the liquid in the sealing tube 1 is pushed to move towards the opening end of the sealing tube 1, the first piston 2 and the piston rod 3 are driven to move downwards, and the two circuit breakers are subjected to opening operation at the same time.

The volume-variable component consists of the shell 4, the phase-change expansion substance 5 and the second piston 6, can realize the opening action of the two circuit breakers when the temperature of the change-over switch exceeds a preset threshold value, and has the advantages of low cost and simple structure.

As a preferable technical solution, the phase change expanding material 5 is a memory spring made of a shape memory alloy, the memory spring has a characteristic of extending in an axial direction after being heated and heated, a phase change temperature of the memory spring is greater than 65 degrees and less than 85 degrees, one end of the memory spring is fixedly connected with the second piston 6, and the other end of the memory spring is fixedly connected with an inner side wall of the chamber.

Example three:

As a preferable technical solution, the phase change expanding material 5 is a memory spring made of a shape memory alloy, the memory spring has a characteristic of being axially elongated after being heated to a temperature, the phase change temperature of the memory spring is greater than or less than a certain temperature, one end of the memory spring is fixedly connected with the second piston 6, and the other end of the memory spring is fixedly connected with the inner side wall of the chamber.

In this embodiment, as shown in fig. 4, the variable volume component further includes a first connecting rod 7, a second connecting rod 8, a third connecting rod 9, a fourth connecting rod 10, a first connecting plate 11, a second connecting plate 12, a coil spring 13, a third piston 14, and a stopper 15, one end of the first connecting rod 7 is hinged to the piston, the other end of the first connecting rod 7 is hinged to one end of the second connecting rod 8, the other end of the second connecting rod 8 is hinged to the inner sidewall of the chamber, one end of the first connecting plate 11 is fixedly connected to the inner sidewall of the chamber, the other end of the first connecting plate 11 is fixedly connected to one end of the coil spring 13, the other end of the coil spring 13 is fixedly connected to the second connecting plate 12, the third connecting rod 9 is rotatably connected to the inner sidewall of the chamber through a rotating shaft, and one end of the fourth connecting rod 10 is fixedly connected to the third piston 14, the third piston 14 is connected with the inner side wall of the chamber in a sliding and sealing manner, the stopper 15 is annular, the stopper 15 is fixedly connected with the inner wall of the chamber and is positioned between the third piston 14 and the second piston 6, and the first connecting rod 7, the second connecting rod 8, the third connecting rod 9, the fourth connecting rod 10, the first connecting plate 11, the second connecting plate 12 and the spiral spring 13 are positioned between the second piston 6 and the third piston 14; one end of the third connecting rod 9 is over against the second connecting plate 12, the other end of the third connecting rod 9 is over against the other end of the fourth connecting rod, and the spiral spring 13 and the second connecting plate 12 are located between the first connecting plate 11 and the third connecting rod 9. When the temperature of the change-over switch is less than a preset temperature threshold, the third piston 14 is in contact with the stop 15. When the two-way circuit breaker normally opens and closes, the stop block 15 can block the third piston 14 from moving towards the inside of the chamber, so that the two-way circuit breaker can not be simultaneously closed under the action of liquid in the sealing tube 1. And when the temperature of the change-over switch is greater than the preset temperature threshold value, the third piston 14 is separated from the stop block 15, liquid in the sealing tube 1 is pushed to move towards the opening end, and then the first piston 2 and the piston rod 3 are pushed to move downwards, so that the opening action of the two-way circuit breaker is completed.

When the memory spring is heated and stretched, the second piston 6 and the first connecting rod are pushed to move towards the opening end of the cavity, one end of the second connecting rod rotates by taking a hinge point of the second connecting rod and the cavity as a circle center, and one end of the second connecting rod is in contact with the second connecting plate 12 and pushes the second connecting plate 12 to move towards the opening end of the cavity, so that the spiral spring 13 is contracted to store elastic force; when memory spring temperature is greater than the predetermined temperature threshold value, the one end of second connecting rod with the separation of second connecting plate 12, second connecting plate 12 moves toward second piston 6 under bolt spring elastic force effect, strikes the one end of third connecting rod 9, and the other end of third connecting rod is close to toward the other end of fourth connecting rod rapidly, and third piston 14 moves toward the opening of cavity under the effect of fourth connecting rod 10, then moves down rapidly through first piston 2 of the lubricating oil drive in the sealed tube 1 and piston rod 3, makes first circuit breaker and second circuit breaker separating brake.

By providing the first link 7, the second link 8, the third link 9, the fourth link 10, the first connecting plate 11, the second connecting plate 12, the coil spring 13, the third piston 14, and the stopper 15, it is possible to store elastic force for the coil spring 13 by a length change of the memory spring when it is elongated by heat. When the temperature of the memory spring is higher than the preset temperature threshold value, the third piston 14 is driven to move towards the opening part of the cavity by utilizing the elastic force instantaneously released by the spiral spring 13, so that the first circuit breaker and the second circuit breaker can be rapidly switched off under the high-temperature condition, and the sensitivity of the first circuit breaker and the second circuit breaker is improved. In addition, an accurate preset temperature threshold value can be set for the change-over switch by adjusting the sizes of the first connecting rod 7, the second connecting rod 8, the third connecting rod 9, the fourth connecting rod 10, the first connecting plate 11, the second connecting plate 12, the coil spring 13, the third piston 14 and the stop 15 and the phase change temperature of the memory spring.

In addition, due to the arrangement of the first link 7, the second link 8, the third link 9, the fourth link 10, the first connecting plate 11, the second connecting plate 12, the coil spring 13, the third piston 14 and the stopper 15, when the transfer switch temperature is lower than the preset temperature threshold, the first circuit breaker and the second circuit breaker can be normally operated. Only when the temperature of the change-over switch is larger than a preset temperature threshold value, the first circuit breaker and the second circuit breaker are enabled to be opened simultaneously, and the reliability and the stability of the change-over switch are enhanced.

As a preferred technical solution, the fourth link 10 is L-shaped. In this way, when the third link 9 is impacted by the second connecting plate 12, the contact time between the other end of the third link 9 and the fourth link 10 can be increased to better push the third piston 14 to move toward the opening part of the chamber through the fourth link 10.

As a preferable technical solution, when the temperature of the change-over switch is less than a degree, one end of the third link 9 is in contact with the second connecting plate 12 and the coil spring 13 is in a compressed state.

Since those skilled in the art can obtain the optimal sizes of the components such as the sealing tube 1, the piston rod 3, the first connecting rod 7, the second connecting rod 8, the third connecting rod 9, the fourth connecting rod 10, the first connecting plate 11, the second connecting plate 12, the coil spring 13, the third piston 14, the stopper 15, and the like under the condition of repeated debugging, when the temperature of the transfer switch is greater than the preset temperature threshold, the first circuit breaker and the second circuit breaker can be rapidly switched off, and thus, the detailed description is omitted here.

Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. That is, the methods, systems, and devices discussed above are examples, and various configurations may omit, replace, or add various processes or components as appropriate. For example, in alternative configurations, the methods may be performed in an order different than that described and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, as different aspects and elements of the configurations may be combined in a similar manner. Further, elements therein may be updated as technology evolves, i.e., many of the elements are examples and do not limit the scope of the disclosure or claims.

Specific details are given in the description to provide a thorough understanding of the exemplary configurations including implementations. However, configurations may be practiced without these specific details, such as well-known circuits, processes, algorithms, structures, and techniques, which have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.

It is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, that are intended to define the spirit and scope of this invention. The above examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.

Claims

1. An interlocking structure of a change-over switch comprises a hollow sealing tube, a first piston connected with the inner walls of two ends of the sealing tube in a sliding and sealing mode, and a piston rod, wherein one end of the first piston is movably inserted into the end portion of the sealing tube and fixedly connected with the first piston, and liquid is filled in the sealing tube, the interlocking structure of the change-over switch is characterized by further comprising a volume variable component arranged in the sealing tube, the volume variable component comprises a shell, a phase-change expansion substance and a second piston, the inner wall of the shell is provided with two chambers which are independent from each other and isolated from each other, one end of each chamber is closed, one end of each chamber is provided with an opening, the second piston is connected with the inner wall of each chamber in a sliding and sealing mode, the phase-change expansion substance is arranged between the inner wall of each chamber and the second piston, and is configured to extend and drive the second piston to move towards the opening end of each chamber, and then the piston rod is driven to move away from the opening end of the sealing tube by driving the liquid.

2. The interlock structure of a change-over switch according to claim 1, wherein said phase change expanding material is a cylindrical shape memory alloy.

3. An interlock construction for a change-over switch according to any one of the preceding claims, characterized in that the phase change expanding substance is a memory spring.

4. The interlock structure of a change-over switch according to any one of the preceding claims, wherein said housing is a circular tube having an outer diameter smaller than an outer diameter of said sealing tube.

5. The interlock structure of a change-over switch according to any one of the preceding claims, wherein said round tube is made of an aluminum alloy material.

6. An interlock construction of a change-over switch according to any one of the preceding claims, characterized in that the liquid is placed between two of the piston rods.

7. An interlock structure of a change-over switch according to any one of the preceding claims, characterized in that said liquid is lubricating oil.

8. An interlock structure of a change-over switch according to any one of the preceding claims, characterized in that the sealing tube is of an inverted U-shaped configuration.

9. An interlock structure of a transfer switch according to any one of the preceding claims, wherein the sealing tube comprises a straight portion, a first vertical portion and a second vertical portion provided at both ends of the straight portion, both the first vertical portion and the second vertical portion communicating with the straight portion.

10. A diverter switch interlock structure as recited in any of the preceding claims, wherein said variable volume member is located intermediate the straight portions of said sealing tube.