Integrated insulating pull rod of vacuum arc-extinguishing chamber

Abstract

The utility model relates to an integrated insulating pull rod for a vacuum arc-extinguishing chamber. The utility model aims to provide the integrated insulating pull rod of the vacuum arc-extinguishing chamber, which is small in size, convenient to install, long in insulating distance and high in precision. The vacuum arc-extinguishing chamber integrated insulation pull rod comprises an insulation rod body, a vacuum bubble connector and a first spring, the vacuum bubble connector is firmly sleeved on the middle part of the pull rod, the first spring is sleeved on the insulation rod body and is not contacted with the insulation rod body, and the first spring is fixedly connected with the vacuum bubble connector. The end portion, close to the first spring, of the insulating rod body is located in the first spring.

Description

TECHNICAL FIELD

[0001] The utility model relates to an insulating pull rod, in particular to an integrated insulating pull rod for a vacuum arc-extinguishing chamber. BACKGROUND

[0002] The full-insulation sealed circuit breaker device can close, carry and break the current in the loop in normal operation, and can carry, close and break abnormal conditions in a short time when short-circuit current and fault current occur in the power system, thereby ensuring safe operation of the power supply line.

[0003] In the current domestic power system, 40.5kV switch equipment is mainly dominated by KYN61-40.5 and GIS gas insulated switch equipment. Since the KYN61-40.5 switch equipment is large in size, large in land occupation and heavy in weight, its transportation and installation are very inconvenient, and its environmental adaptability is poor. The GIS gas insulated switch equipment needs to be filled with SF6 gas for insulation, and the insulator used by the circuit breaker is of a split structure, and the insulator, the contact spring, the connecting rod and the bolt are fixed with each other, resulting in that the structure is large in size and cannot meet the use of existing small current and small size products. SUMMARY

[0004] The utility model wants to solve the technical problem of providing a vacuum arc-extinguishing chamber integrated insulating pull rod which is small in size, convenient to install, long in insulation distance and high in precision.

[0005] The utility model discloses a vacuum arc-extinguishing chamber integrated insulating pull rod, which comprises an insulating rod body, a vacuum bubble connecting head and a first spring, the vacuum bubble connecting head is firmly sleeved in the middle part of the pull rod, the first spring is sleeved on the insulating rod body and does not contact each other, the first spring is fixedly connected with the vacuum bubble connecting head, and the end part of the insulating rod body close to the first spring is located in the first spring.

[0006] The utility model discloses a vacuum arc-extinguishing chamber integrated insulating pull rod, wherein a threaded disc is fixedly sleeved on the outer periphery of the vacuum bubble connecting head, and the insulating rod body is vertically arranged with the threaded disc.

[0007] The utility model discloses a vacuum arc-extinguishing chamber integrated insulating pull rod, wherein a second spring is further included, the second spring is sleeved on the first spring and does not contact each other, one end of the second spring is fixedly connected with the threaded disc, and the other end of the second spring is flush with one end of the first spring away from the vacuum bubble connecting head.

[0008] The utility model discloses a vacuum arc-extinguishing chamber integrated insulating pull rod, wherein the first spring and the second spring are both overtravel springs.

[0009] The utility model relates to a kind of integrated insulation pull rod of vacuum arc-extinguishing chamber, wherein still including insulation sleeve, the threaded disc outer periphery is equipped with nesting, the insulation sleeve is sleeved on the second spring and the both do not contact each other, the insulation sleeve one end is connected in the nesting outer periphery and second spring is completely wrapped in.

[0010] The utility model relates to a kind of integrated insulation pull rod of vacuum arc-extinguishing chamber, wherein the insulation sleeve another end is provided with connecting hole, the insulation rod body is oppositely arranged with connecting hole, and the axial line of the both is on same straight line.

[0011] The utility model relates to a kind of integrated insulation pull rod of vacuum arc-extinguishing chamber, and the difference between prior art is that the utility model insulation rod body and first spring and vacuum bubble connector are connected together cleverly and form integrated design, are further reinforced by second spring and threaded disc, finally by the insulation sleeve and nesting joint, first spring and second spring with elasticity are wrapped in, insulation sleeve is equipped with the connecting hole for inserting push rod, push and pull action is carried out in the insulation sleeve by the push rod, drive two springs to realize telescopic, and then drive insulation rod body to generate displacement;The movement of insulation rod body further acts on moving contact in vacuum arc-extinguishing chamber, so that it moves correspondingly;By the contact and separation operation between moving contact and static contact, the opening and cutting control of circuit are finally achieved, so that the on-off function of entire circuit system is realized.

[0012] The utility model relates to a kind of integrated insulation pull rod of vacuum arc-extinguishing chamber, and at least includes following beneficial effects:

[0013] (1) by first spring and second spring extrusion insulation rod body, increase the pressure of moving contact extrusion static contact in vacuum arc-extinguishing chamber, even if contact wear still can control the opening and closing of moving contact and static contact, guarantee the stability of circuit system.

[0014] (2) guarantee the pressure between moving contact and static contact, reduce contact resistance.

[0015] (3) integrated setting, facilitate installation, satisfy the product use of small volume.

[0016] The utility model will be further described below in connection with the drawings. DRAWINGS

[0017] Figure 1 It is the three-dimensional structure schematic diagram of the utility model for a kind of integrated insulation pull rod of vacuum arc-extinguishing chamber hiding nesting and insulation sleeve;

[0018] Figure 2 It is the three-dimensional structure schematic diagram of the utility model for a kind of integrated insulation pull rod of vacuum arc-extinguishing chamber hiding insulation sleeve Figure 1 ;

[0019] Figure 3The utility model discloses a kind of vacuum arc-extinguishing chamber integrated insulation pull rod hidden insulation sleeve three-dimensional structure diagram Figure 2 ;

[0020] Figure 4 The utility model discloses a kind of vacuum arc-extinguishing chamber integrated insulation pull rod three-dimensional structure diagram Figure 1 ;

[0021] Figure 2 The utility model discloses a kind of vacuum arc-extinguishing chamber integrated insulation pull rod three-dimensional structure diagram Figure 6 ;

[0022] Figure 1 The utility model discloses the structure diagram of mounting on vacuum arc-extinguishing chamber.

[0023] Reference signs:

[0024] 1-insulation rod body;2-second spring;3-vacuum bubble connector;4-threaded disc;5-first spring;6-nest;7-insulation sleeve;8-connection hole;9-vacuum arc-extinguishing chamber. Specific embodiments

[0025] As Figure 1 shown, the utility model discloses a kind of vacuum arc-extinguishing chamber integrated insulation pull rod including insulation rod body 1, vacuum bubble connector 3 and first spring 5, vacuum bubble connector 3 firmly set in pull rod middle part, first spring 5 is set on insulation rod body 1 and the both do not contact each other, first spring 5 is fixedly connected with vacuum bubble connector 3, the end of insulation rod body 1 close to first spring 5 is located in first spring 5.

[0026] Insulation rod body 1 is cylindrical, vacuum bubble connector 3 is firmly set in insulation rod body 1 middle part, the lower surface of vacuum bubble connector 3 is firmly connected with first spring 5, vacuum bubble connector 3 is used for force transmission on one hand, when push rod pushes first spring 5, first spring 5 pushes vacuum bubble connector 3, then vacuum bubble connector 3 transmits force to insulation rod body 1;On the other hand, it plays a buffering role, in the action process of vacuum arc-extinguishing chamber 9 movable contact, especially when fast breaking or closing circuit, certain mechanical impact will be generated, vacuum bubble connector 3 can play the role of buffering this impact, prolongs the service life of vacuum bubble connector 3 and entire circuit equipment. The lower end of insulation rod body 1 is located in first spring 5, the both do not contact to reduce movement friction and then prolong its service life, first spring 5 and insulation rod body 1 keep the same central axis, the lower end of insulation rod body 1 is shorter than the lower end of first spring 5, i.e. the lower end of insulation rod body 1 is located in first spring 5, guarantee that push rod pushes first spring 5 and does not contact with insulation rod body 1, it needs to be explained that push rod has magnetism, can guarantee that there is enough force on first spring 5, guarantee its normal work.

[0027] Thus, in operation, when the push rod pushes the first spring 5, the first spring 5 extrudes the vacuum bulb connector 3 and pushes the insulating rod body 1 to move, the insulating rod body 1 pushes the moving contact in the vacuum interrupter 9, the pushing force is increased by the first spring 5, and the pressure of the moving contact extruding the static contact in the vacuum interrupter 9, because the contact area of the moving contact and the static contact is increased, the resistance between them is reduced, even if one contact is worn, the two contacts can still be in contact, thereby ensuring the stability of the circuit system.

[0028] As shown in Figure 1 , the vacuum bulb connector 3 is fixedly sleeved with a threaded disc 4, and the insulating rod body 1 is vertically arranged with the threaded disc 4.

[0029] The threaded disc 4 is horizontally sleeved on the outer periphery of the vacuum bulb connector 3, and the two are firmly connected together, and the insulating rod body 1 is perpendicular to each other, so that when the integrated insulating rod body 1 is installed on the vacuum interrupter 9, the insulating rod body 1 pushes the moving contact to move in a straight line, and the threaded disc 4 is provided with threads on the outer periphery for connection with other components.

[0030] As shown in Figures 3-5 , the insulating pull rod further comprises a second spring 2, the second spring 2 is sleeved on the first spring 5 and the two are not in contact with each other, one end of the second spring 2 is fixedly connected with the threaded disc 4, and the other end of the second spring 2 is flush with the end of the first spring 5 away from the vacuum bulb connector 3.

[0031] The second spring 2 is sleeved on the first spring 5, and the two are not in contact with each other, which is beneficial to reduce the friction of movement and prolong the service life of the spring. The upper end of the second spring 2 is firmly connected with the threaded disc 4, and the lower end is flush with the lower end of the first spring 5. The double-spring arrangement further enhances the pushing force and the pressure of the moving contact extruding the static contact in the vacuum interrupter 9, thereby ensuring the stability of the circuit.

[0032] As shown in Figure 4 , the insulating pull rod further comprises an insulating sleeve 7, the threaded disc 4 is sleeved with a nest 6 on the outer periphery, the insulating sleeve 7 is sleeved on the second spring 2 and the two are not in contact with each other, one end of the insulating sleeve 7 is clamped on the outer periphery of the nest 6 to completely wrap the second spring 2 inside.

[0033] The inner wall of the nest 6 is provided with threads matched with the threaded disc 4, and the two are firmly connected through the threads. The outer wall of the nest 6 is provided with a clamping groove, and the inner wall of the insulating sleeve 7 is provided with a clamping block matched with the clamping groove. The insulating sleeve 7 is a cylindrical structure, the upper end of which is firmly clamped on the nest 6 and forms a sealing effect, and the lower end completely wraps the threaded disc 4 and the second spring 2 inside. The insulating sleeve 7 is made of special material, which has enough toughness and certain hardness. The material is not limited here. The internal components are protected from damage, and the internal components are insulated from the outside.

[0034] As shown in Figure 6As shown, the other end of the insulating sleeve 7 is provided with a connecting hole 8, the insulating rod body 1 is arranged opposite to the connecting hole 8, and the axis of the two are on the same straight line.

[0035] The lower end of the insulating sleeve 7 is provided with a connecting hole 8 for inserting the push rod. The connecting hole 8 is on the same straight line as the central axis of the first spring 5, the second spring 2 and the insulating rod body 1, ensuring effective force transmission. When the push rod pushes the two springs, it ensures that the two springs push the insulating rod body 1 to move in a straight line, so that the circuit operates stably.

[0036] Both the first spring 5 and the second spring 2 are overtravel springs. The characteristics of overtravel springs are described below:

[0037] Utilizing the elastic properties of the first spring 5, when it is compressed or stretched by the push rod, it can store elastic potential energy and return to its original shape after the external force disappears, thereby increasing the pushing or pulling force.

[0038] Utilizing the overtravel compensation characteristic of the first spring 5, after the moving contact makes contact with the stationary contact, the moving contact continues to move, thus achieving overtravel compensation. When the overtravel of the moving contact decreases due to wear or other reasons, the first spring 5 can still ensure sufficient contact pressure between the moving contact and the stationary contact through its own elastic deformation, thereby ensuring stable circuit operation.

[0039] By utilizing the pressure adjustment characteristics of the first spring 5, the first spring 5 can adjust the contact pressure between the moving contact and the stationary contact, which can reduce contact resistance, reduce heat generation, and at the same time ensure that the contacts do not separate when a large current is passed.

[0040] In addition to the common characteristics mentioned above, the second spring 2 also has the characteristic of strong coordination. It can not only reduce the volume of the insulating rod 1, but also adjust its own elastic deformation according to the displacement of the insulating rod 1 and the state of the first spring 5 when it cooperates with the first spring 5, thereby achieving dynamic balance with other components and jointly ensuring the correct action and contact between the moving contact and the stationary contact.

[0041] like ​ As shown, when the insulating rod 1 is installed on the vacuum interrupter 9, the insulating sleeve 7 is facing upwards and the insulating rod 1 is facing downwards on the vacuum interrupter 9. The working principle is as follows: When the circuit needs to be closed, the push rod moves downwards inside the insulating sleeve 7, pushing the first spring 5 and the second spring 2. The two springs are compressed and deformed, which in turn pushes the insulating rod 1 downwards. The insulating rod 1 pushes the moving contact inside the vacuum interrupter 9 downwards until the moving contact and the stationary contact are in complete contact. At this time, the circuit is connected.

[0042] When the circuit needs to be disconnected, by the same token, the first spring 5 and the second spring 2 are pulled upward by pushing the rod, the two springs are stretched and deformed to pull the insulating rod body 1 to move upward, the insulating rod body 1 pulls the moving contact in the vacuum interrupter 9 to move upward until the moving contact and the static contact are completely separated, at this time the circuit is disconnected.

[0043] It should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "middle" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0044] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] The above-described embodiments are merely preferred embodiments of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope of the present application as defined by the claims.

Claims

1. A vacuum interrupter integrated insulation pull rod, characterized by: The insulating rod body, the vacuum bulb connecting head and the first spring are included, the vacuum bulb connecting head is firmly sleeved in the middle part of the pull rod, the first spring is sleeved on the insulating rod body and the two are not in contact, the first spring is fixedly connected with the vacuum bulb connecting head, and the end of the insulating rod body close to the first spring is located in the first spring.

2. The integrated insulating pull rod for vacuum interrupter according to claim 1, characterized in that: The outer periphery of the vacuum bulb connecting head is fixedly sleeved with a threaded disc, and the insulating rod body is vertically arranged with the threaded disc.

3. The integrated insulating rod for vacuum interrupter according to claim 2, characterized in that: The second spring is further included, the second spring is sleeved on the first spring and the two are not in contact, one end of the second spring is fixedly connected with the threaded disc, and the other end of the second spring is flush with one end of the first spring away from the vacuum bulb connecting head.

4. The integrated insulating rod for vacuum interrupter according to claim 3, characterized in that: The insulating sleeve is further included, the outer periphery of the threaded disc is sleeved with a nest, the insulating sleeve is sleeved on the second spring and the two are not in contact, and one end of the insulating sleeve is clamped on the outer periphery of the nest to completely wrap the second spring.

5. The integrated insulating rod for vacuum interrupter according to claim 4, characterized in that: The other end of the insulating sleeve is provided with a connecting hole, the insulating rod body is oppositely arranged with the connecting hole, and the axial center lines of the two are on the same straight line.

6. The integrated insulating rod for vacuum interrupter according to claim 5, characterized in that: The first spring and the second spring are both overtravel springs.

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