CN219610299U - Monopole type high-voltage alternating-current vacuum contactor based on miniaturized design - Google Patents

Abstract

The utility model discloses a monopole type high-voltage alternating current vacuum contactor based on miniaturization design, which comprises an insulating shell, a vacuum arc-extinguishing chamber and an electromagnetic driving mechanism, wherein the vacuum arc-extinguishing chamber and the electromagnetic driving mechanism are arranged in the insulating shell in an up-down opposite way, and the electromagnetic driving mechanism can drive a moving contact in the vacuum arc-extinguishing chamber to be communicated with or disconnected from a fixed contact; solid insulation structures are respectively arranged between the outer wall of the vacuum arc-extinguishing chamber and the inner wall of the insulation shell, between the input end of the vacuum arc-extinguishing chamber and the output end of the electromagnetic driving mechanism, and between the outer wall of the electromagnetic driving mechanism and the inner wall of the insulation shell. The solid insulation structure and the existing air in the contactor are combined to form the composite insulation structure, so that the protection level, insulation performance and the like of the high-voltage alternating-current vacuum contactor can be greatly improved, and the high-voltage alternating-current vacuum contactor has the advantages of small overall size, light weight, reasonable structural layout, low manufacturing cost, high protection level, excellent insulation performance and the like.

Description

Monopole type high-voltage alternating-current vacuum contactor based on miniaturized design

Technical Field

The utility model relates to the technical field of high-voltage switches, in particular to a monopole type high-voltage alternating current vacuum contactor based on a miniaturized design.

Background

The high-voltage alternating-current vacuum contactor is used as a vacuum switch for controlling the frequent start and stop of a high-voltage heavy-current load and the on-off use. Because the primary high-voltage loop, the secondary loop and the ground have higher insulation and voltage resistance requirements, the overall dimension of the contactor product is larger, and the problem of insulation and voltage resistance correction multiplying power caused by altitude change exists, so that the overall dimension of the contactor product is further increased. The overall dimension of the product is larger, so that the defects of large occupied area of the product, high whole machine cost of the switch cabinet, high transportation cost and the like are caused.

Although the existing partial contactor products adopt the solid-sealed polar pole design so as to improve the pressure resistance between the primary high-voltage loop fracture, the solid-sealed polar pole design does not have positive influence on the insulation performance between the primary high-voltage loop and the secondary loop and between the primary high-voltage loop and the ground. Thus, the overall size of the current contactor product is still large.

In view of this, the present utility model has been made.

Disclosure of Invention

In order to overcome the defects, the utility model provides a monopole type high-voltage alternating current vacuum contactor based on a miniaturized design, which has the advantages of small overall size/occupied area, light weight, reasonable structural layout, low manufacturing cost, high protection level, excellent insulating property and the like, and has good market prospect.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the monopole type high-voltage alternating current vacuum contactor based on miniaturization design comprises an insulating shell, a vacuum arc-extinguishing chamber and an electromagnetic driving mechanism, wherein the vacuum arc-extinguishing chamber and the electromagnetic driving mechanism are arranged in the insulating shell in an up-down opposite mode, and the electromagnetic driving mechanism can drive a moving contact in the vacuum arc-extinguishing chamber to be communicated with or disconnected from a fixed contact; solid insulation structures are respectively arranged between the outer wall of the vacuum arc-extinguishing chamber and the inner wall of the insulation shell, between the input end of the vacuum arc-extinguishing chamber and the output end of the electromagnetic driving mechanism, and between the outer wall of the electromagnetic driving mechanism and the inner wall of the insulation shell.

As a further improvement of the present utility model, the three solid insulation structures are not identical.

As a further improvement of the utility model, the solid insulation structure arranged between the outer wall of the vacuum arc-extinguishing chamber and the inner wall of the insulation shell is defined as a first solid insulation structure, the first solid insulation structure is a silica gel insulation layer, and the silica gel insulation layer is fixedly formed between the outer wall of the vacuum arc-extinguishing chamber and the inner wall of the insulation shell through a potting process.

As a further improvement of the utility model, the vacuum arc-extinguishing chamber is also provided with a sealing shell which is arranged in the upper part of the inner cavity of the insulating shell and is arranged with the insulating shell in the same vertical central line, and the silica gel insulating layer is respectively encapsulated between the outer wall of the side wall of the sealing shell and the upper part of the inner wall of the side wall of the insulating shell and between the outer wall of the top wall of the sealing shell and the inner wall of the top wall of the insulating shell.

As a further improvement of the utility model, the solid insulation structure arranged between the input end of the vacuum arc-extinguishing chamber and the output end of the electromagnetic driving mechanism is defined as a second solid insulation structure, the second solid insulation structure is an insulator made of insulating materials, and the upper end and the lower end of the insulator are respectively sleeved on the input end of the vacuum arc-extinguishing chamber and the output end of the electromagnetic driving mechanism.

As a further improvement of the utility model, the vacuum arc extinguishing chamber is also provided with a sealing shell and a movable conducting rod, wherein the sealing shell is arranged in the upper part of the inner cavity of the insulating shell and is arranged in the same vertical central line as the insulating shell, and the silica gel insulating layer is encapsulated between the outer wall of the sealing shell and the inner wall of the insulating shell; the movable conducting rod is also arranged with the insulating shell in the same vertical central line, the upper end of the movable conducting rod is arranged in the sealing shell and is fixedly connected with the movable contact, the lower end of the movable conducting rod is sealed and movably stretches out of the lower side of the sealing shell, and the lower end of the movable conducting rod is also detachably and fixedly connected with a screw rod which is arranged with the movable conducting rod in the same vertical central line, and the screw rod is the input end of the vacuum arc extinguishing chamber;

the electromagnetic driving mechanism is provided with an outer shell, a coil iron core assembly and a pull rod, wherein the outer shell is arranged in the lower part of an inner cavity of the insulating shell and is also arranged with the insulating shell in the same vertical central line, and the coil iron core assembly is arranged in the outer shell and is used for generating electromagnetic suction force; the pull rod extends vertically and is also arranged with the insulating shell in the same vertical central line, the lower end of the pull rod is in transmission connection with the coil iron core assembly, the upper end of the pull rod is sealed and movably extends out of the upper side of the shell, and the upper end of the pull rod is the output end of the electromagnetic driving mechanism;

the upper end and the lower end of the insulator are respectively sleeved on the screw rod and the upper end of the pull rod.

As a further improvement of the utility model, the insulator is provided with an insulating base body part which extends vertically and is arranged with the screw rod and the pull rod in the same vertical center line, a circle of supporting edges which extend from the middle part of the outer wall of the insulating base body part and extend outwards in the transverse direction, a circle of upper insulating walls which extend upwards in the vertical direction from the upper surface of the periphery of the supporting edges, and a circle of lower insulating walls which extend downwards in the vertical direction from the lower surface of the periphery of the supporting edges, counter bores are respectively arranged at the upper end and the lower end of the insulating base body part in the center, and the upper ends of the screw rod and the pull rod are respectively inserted into the two counter bores correspondingly and cannot be separated from the two counter bores.

As a further improvement of the utility model, the solid insulation structure arranged between the outer wall of the electromagnetic driving mechanism and the inner wall of the insulation shell is defined as a third solid insulation structure, the third solid insulation structure is an insulation sleeve made of insulation material, the insulation sleeve is tightly sleeved on the outer wall of the outer shell, and meanwhile, the insulation sleeve is tightly attached on the inner wall of the insulation shell; in addition, the upper end of the insulating sleeve is also inserted between the lower part of the insulating base body and the lower insulating wall, so that the insulating sleeve and the insulator form a reinforced insulating structure together.

As a further improvement of the utility model, the insulating sleeve is a hollow convex-shaped structural body with upper and lower openings.

As a further development of the utility model, the insulating housing is a hollow truncated cone structure made of an insulating thermoplastic composite material.

As a further improvement of the utility model, the vacuum arc-extinguishing chamber is also provided with a static conductive rod, the static conductive rod and the movable conductive rod are arranged in the same vertical central line, the lower end of the static conductive rod is fixedly connected with the static contact, and the upper end of the static conductive rod passes through the top wall of the sealed shell in a sealing way and is detachably and fixedly connected with the top wall of the insulated shell;

the monopole type high-voltage alternating current vacuum contactor is also provided with an incoming line busbar serving as an incoming line connecting end and a soft connecting wire serving as an outgoing line connecting end, wherein one end of the incoming line busbar is detachably and fixedly connected with the upper end of the static conducting rod and the top wall of the insulating shell respectively, and the other end of the incoming line busbar extends out of the side wall of the insulating shell in a sealing manner; one end of the flexible connecting wire is fixedly sleeved on the lower end of the movable conducting rod, and the other end of the flexible connecting wire extends out of the side wall of the insulating shell in a sealing mode and is fixedly connected with the outer wall of the insulating shell at the same time.

As a further improvement of the utility model, a mounting cavity shell A communicated with the inner cavity of the insulating shell is integrally formed at the lower part of the outer wall of the side wall of the insulating shell, and a power supply control module is accommodated in the mounting cavity shell A;

in addition, the circuit interface of the power supply control module and the other end of the flexible wire are positioned outside the same side of the insulating shell.

As a further improvement of the utility model, two installation cavity shells B which are respectively communicated with the inner cavities of the two installation cavity shells B are integrally formed at the lower part of the outer wall of the side wall of the insulating shell, the two installation cavity shells B are oppositely and symmetrically arranged, and auxiliary switches are respectively accommodated in the two installation cavity shells B; in addition, neither of the installation cavity cases B is on the same side of the insulating case as the installation cavity case a.

The beneficial effects of the utility model are as follows: compared with the traditional high-voltage alternating-current vacuum contactor structure, the utility model makes the following structural innovations: (1) a first solid insulation structure is arranged between the outer wall of the vacuum arc-extinguishing chamber and the inner wall of the insulation shell, a second solid insulation structure is arranged between the input end of the vacuum arc-extinguishing chamber and the output end of the electromagnetic driving mechanism, and a third solid insulation structure is arranged between the outer wall of the electromagnetic driving mechanism and the inner wall of the insulation shell; firstly, the first solid insulation structure is used for replacing air insulation outside a traditional vacuum arc-extinguishing chamber, so that the external insulation strength between the fractures of the contactor product can be greatly improved, adverse effects on the contactor product caused by altitude changes can be avoided, and the protection grade of the contactor product is improved; and secondly, by means of the combination of the second solid insulating structure and the third solid insulating structure, the air direct contact distance can be well reduced, the insulating gap between the primary high-voltage loop and the secondary loop is blocked, the creepage distance is increased, and therefore the insulating strength/insulating grade of a contactor product is improved. Therefore, the three solid insulation structures designed by the utility model not only improve the protection level and the insulation strength/insulation level of the contactor product, but also provide solid and reliable technical support and technical guarantee for realizing the miniaturization design of the contactor product. (2) The electromagnetic driving mechanism adopts a closed straight-pull solenoid type structure, and has the advantages of high protection level, light weight, small starting and maintaining power, simple and stable structure and the like; thereby also providing technical support and technical guarantee for realizing miniaturized design of contactor products. (3) The PWM chopper circuit controlled by the singlechip is integrated in the power control module, so that the coil iron core assembly in the electromagnetic driving mechanism can be driven to carry out contactless switching control when the electromagnetic driving mechanism is switched on and maintains the working state; therefore, the improvement of the power supply control module also provides a certain technical support and technical guarantee for realizing the miniaturization design of the contactor product. In a word, through structural innovation, the designed and provided high-voltage alternating current vacuum contactor has the advantages of small overall size/occupied area, light weight, reasonable structural layout, low manufacturing cost, high protection level, excellent insulating property and the like, and has a good market prospect.

Drawings

FIG. 1 is a schematic cross-sectional view of a miniaturized design-based single-pole high-voltage AC vacuum contactor according to the present utility model;

FIG. 2 is one of the schematic partial enlarged sectional views of the contactor shown in FIG. 1;

FIG. 3 is a second enlarged partial schematic view of the cross-sectional structure of the contactor shown in FIG. 1;

fig. 4 is a schematic side view of a miniaturized design-based single-pole ac vacuum contactor according to the present utility model.

The following description is made with reference to the accompanying drawings:

1. an insulating housing; 2. a vacuum arc extinguishing chamber; 20. a moving contact; 21. a stationary contact;

22. a sealed housing; 220. a main body portion; 221. a stationary end cover plate; 222. a movable end cover plate; 23. a shield; 24. a static conductive rod; 25. a movable conductive rod; 26. a bellows; 27. a guide sleeve; 28. a bellows shield; 29. a screw; 3. an electromagnetic drive mechanism; 30. an outer housing; 31. a pull rod; 32. a coil winding; 33. a movable iron core; 34. a stationary core; 35. a return spring; 36. auxiliary movable contact pieces; 4. a silica gel insulating layer; 5. an insulator; 50. an insulating base portion; 51. a support edge; 52. an upper insulating wall; 53. a lower insulating wall; 54. countersink; 55. a nut B; 56. a spring; 57. a baffle ring; 6. an insulating sleeve; 7. a wire inlet busbar; 8. soft connection; 9. installing a cavity shell A; 10. a power control module; 11. installing a cavity shell B; 12. and an auxiliary switch.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Example 1:

referring to fig. 1 to 3, the present utility model provides a miniaturized design-based unipolar high-voltage ac vacuum contactor, which includes an insulating housing 1, a vacuum arc-extinguishing chamber 2 and an electromagnetic driving mechanism 3, wherein the vacuum arc-extinguishing chamber 2 and the electromagnetic driving mechanism 3 are disposed in the insulating housing 1 in a vertically opposite manner, and the electromagnetic driving mechanism 3 can drive a moving contact 20 in the vacuum arc-extinguishing chamber 2 to be connected with or disconnected from a fixed contact 21; in particular, the utility model also provides solid insulation structures between the outer wall of the vacuum interrupter 2 and the inner wall of the insulating housing 1, between the input end of the vacuum interrupter 2 and the output end of the electromagnetic driving mechanism 3, and between the outer wall of the electromagnetic driving mechanism 3 and the inner wall of the insulating housing 1. The solid insulation structure is combined with the existing air insulation mode in the high-voltage alternating-current vacuum contactor to form a composite insulation structure, so that the protection level, insulation performance and the like of the high-voltage alternating-current vacuum contactor can be greatly improved (the specific description is described below), and solid and reliable technical support and technical guarantee are provided for realizing miniaturization design of the contactor product.

In this embodiment, according to product design requirements, the specific structures of the three solid insulation structures are different and are respectively: (1) if the solid insulation structure arranged between the outer wall of the vacuum arc-extinguishing chamber 2 and the inner wall of the insulation shell 1 is defined as a first solid insulation structure, the first solid insulation structure is a silica gel insulation layer 4, and the silica gel insulation layer 4 is fixedly formed between the outer wall of the vacuum arc-extinguishing chamber 2 and the inner wall of the insulation shell 1 through a potting process. According to the utility model, the air insulation outside the traditional vacuum arc-extinguishing chamber is replaced by the encapsulating silica gel insulating layer, so that the external insulation strength between the fractures of the contactor product is improved, the adverse effect on the contactor product caused by the altitude change is avoided, and the protection grade of the contactor product is improved.

(2) If the solid insulation structure arranged between the input end of the vacuum arc-extinguishing chamber 2 and the output end of the electromagnetic driving mechanism 3 is defined as a second solid insulation structure, the second solid insulation structure is an insulator 5 made of insulation material (such as silica gel material), and the upper end and the lower end of the insulator 5 are respectively sleeved on the input end of the vacuum arc-extinguishing chamber 2 and the output end of the electromagnetic driving mechanism 3.

(3) If the solid insulation structure arranged between the outer wall of the electromagnetic driving mechanism 3 and the inner wall of the insulation housing 1 is defined as a third solid insulation structure, the third solid insulation structure is an insulation sleeve 6 made of insulation material (such as silica gel material), the insulation sleeve 6 is tightly sleeved on the outer wall of the electromagnetic driving mechanism 3, and meanwhile, the insulation sleeve 6 is tightly attached on the inner wall of the insulation housing 1; in addition, the upper end of the insulating sleeve 6 is further inserted into the lower portion of the insulator 5, so that the insulating sleeve 6 and the insulator 5 together form a reinforced insulating structure, namely: the insulation sleeve 6 is connected with the insulator 5, so that the air direct contact distance can be well reduced, the insulation gap between the primary high-voltage loop and the secondary loop is blocked, the creepage distance is increased, and the insulation strength/insulation grade of a contactor product is improved.

Therefore, the three solid insulation structures designed by the utility model provide firm and reliable technical support and technical guarantee for realizing miniaturized design of the contactor product on the basis of improving the protection level and the insulation strength/insulation level of the contactor product.

The specific structures and the interconnection relationships of the insulating housing 1, the vacuum interrupter 2, the electromagnetic driving mechanism 3, and the three solid insulating structures in the single-pole high-voltage ac vacuum contactor according to the present utility model are described in detail below.

In this embodiment, preferably, the insulating housing 1 is a hollow truncated cone structure made of an insulating thermoplastic composite material. The insulating thermoplastic composite material can be further preferably a glass fiber nylon thermoplastic composite material, has the performances of light weight, high impact resistance, high strength, high insulativity and the like, and therefore the overall structure of the contactor product can be ensured to be small in size, stable, difficult to stress crack and excellent in insulating performance.

In this embodiment, preferably, as shown in fig. 1 and fig. 2, the vacuum interrupter 2 includes a sealed housing 22, a shielding case 23, a moving contact 20, a fixed contact 21, a fixed conductive rod 24 and a moving conductive rod 25, where the sealed housing 22 is made of glass or ceramic insulating material, the sealed housing 22 is disposed in an upper portion of an inner cavity of the insulating housing 1 and is disposed with a vertical center line with the insulating housing 1, and the silica gel insulating layer 4 is respectively encapsulated between a sidewall outer wall of the sealed housing 22 and an upper portion of a sidewall inner wall of the insulating housing 1, and between a top wall outer wall of the sealed housing 22 and a top wall inner wall of the insulating housing 1 (specifically, refer to fig. 1 and fig. 2). Further, the seal housing 22 structure can be further divided into: the device comprises a hollow vertical tubular main body 220, a static end cover plate 221 and a movable end cover plate 222 which are respectively and fixedly connected to the upper end and the lower end of the main body 220, wherein the silica gel insulating layer 4 is respectively encapsulated between the outer wall of the main body 220 and the upper part of the inner wall of the side wall of the insulating housing 1, and between the outer wall of the static end cover plate 221 and the inner wall of the top wall of the insulating housing 1.

The shielding cover 23 is positioned and internally arranged in the sealed shell 22, the fixed contact 21 and the moving contact 20 which are arranged in a vertically opposite way are accommodated in the shielding cover 23, and the shielding cover 23 is used for preventing a large amount of metal vapor and liquid drops generated in an arc gap during arcing from being sprayed onto the inner wall of the arc extinguishing chamber, so that the compressive strength of the shielding cover is reduced, meanwhile, the metal vapor is rapidly cooled and condensed into solid, and the solid is not returned into the arc gap, thereby being beneficial to rapidly reducing the density of gas particles in the arc gap and rapidly recovering the strength of a medium, enhancing the arc extinguishing capability and prolonging the service life.

The static conductive rod 24 and the movable conductive rod 25 extend vertically and are also arranged with the insulating housing 1 along the same vertical central line, i.e. the static conductive rod 24 and the movable conductive rod 25 are arranged along the same vertical central line. The lower extreme of quiet conducting rod 24 stretches into in the shield cover 23, and with quiet contact 21 fixed connection, the upper end of quiet conducting rod 24 is sealed after passing sealed shell 22 roof, with insulating shell 1 roof can dismantle fixed connection, specifically: the static end cover plate 221 is provided with a perforation A for the static conducting rod 24 to penetrate, the perforation A is in welded sealing connection with the static conducting rod 24, a threaded hole is formed in the middle of the top wall of the insulating shell 1, and the upper end of the static conducting rod 24 is in threaded connection with the threaded hole through an embedded screw. The upper end of the movable conductive rod 25 is disposed in the sealed housing 22 and fixedly connected with the movable contact 20, and further: the upper end of the movable conducting rod 25 is arranged in the shielding cover 23 in a stretching manner and is fixedly connected with the movable contact 20; the lower end of the movable conducting rod 25 is sealed and movably extends out of the lower side of the sealed housing 22, and a screw 29 (screw connection can be adopted in a detachable connection mode) which is arranged with the movable conducting rod 25 in the same vertical center line is detachably and fixedly connected to the lower end of the movable conducting rod 25, and the screw 29 is the input end of the vacuum arc extinguishing chamber 2.

In addition, the specific structure for realizing the sealing of the lower end of the movable conductive rod 25 and the movable extension outside the lower side of the sealing housing 22 is as follows: the movable end cover plate 222 is provided with a perforation B for the movable conducting rod 25 to penetrate, a corrugated pipe 26 and a guide sleeve 27 are arranged between the perforation B and the movable conducting rod 25, the corrugated pipe 26 has the functions of isolating air and enabling the movable conducting rod 25 to move up and down, and the guide sleeve 27 has the functions of sealing air and guiding movement. The sealing and air-isolating functions of the bellows 26 and the guide sleeve 27 belong to the conventional technical means of the vacuum arc-extinguishing chamber, and are not described in detail here.

In addition, a bellows shield 28 is further arranged on the outer cover of the bellows 26, and is used for preventing metal vapor generated during arcing from condensing on the surface of the bellows 26, protecting the bellows 26, and further prolonging the service life of the contactor. In addition, the shielding case 23, the moving contact 20, the fixed contact 21, the bellows 26, the guide sleeve 27, and the like are respectively arranged in the same vertical center line as the insulating case 1, similarly to the sealing case 22, the fixed conductive rod 24, and the moving conductive rod 25.

In summary, the vacuum interrupter structure adopted in this embodiment has the following advantages: (1) the traditional vacuum arc-extinguishing chamber air insulation is replaced by the encapsulation silica gel insulating layer, so that the external insulation strength between the fractures of the contactor product can be greatly improved, adverse effects on the contactor product caused by altitude change are avoided, and the protection level of the contactor product is further improved. (2) The vacuum arc-extinguishing chamber adopts a longitudinal magnetic field structure, and the structure ensures that the electric arc is uniformly distributed on the surface of the contact during combustion, thereby improving breaking capacity and protecting the contact.

In this embodiment, as shown in fig. 1 and fig. 3, preferably, the electromagnetic driving mechanism 3 has an outer housing 30, a coil core assembly and a pull rod 31, wherein the outer housing 30 is disposed in a lower portion of an inner cavity of the insulating housing 1 and is also disposed in the same vertical center line as the insulating housing 1, and the coil core assembly is disposed in the outer housing 30, for generating electromagnetic attraction force; the pull rod 31 extends vertically and is also arranged along the same vertical central line as the insulating housing 1, the lower end of the pull rod 31 is in transmission connection with the coil iron core assembly, the upper end of the pull rod 31 is sealed and movably extends out of the upper side of the housing 30, and the upper end of the pull rod 31 is the output end of the electromagnetic driving mechanism 3.

In addition, in combination with the above-mentioned structure of the vacuum interrupter 2, the upper and lower ends of the insulator 5 are respectively sleeved on the upper ends of the screw 29 and the pull rod 31.

In this embodiment, the electromagnetic driving mechanism 3 adopts a closed straight-pull solenoid structure, which has the advantages of high protection level, light weight, small starting and maintaining power, simple and stable structure, and the like, and also provides technical support and technical guarantee for realizing miniaturized design of contactor products. In addition, the coil core assembly in the electromagnetic driving mechanism 3 adopts a well-known structure, specifically: the coil iron core assembly is provided with a coil winding 32, a movable iron core 33, a static iron core 34 and a reset spring 35, the coil winding 32 is fixedly arranged in an inner cavity of the outer shell 30, the movable iron core 33 is movably arranged in a space surrounded by the coil winding 32, the static iron core 34 is positioned above the movable iron core 33 and fixedly connected to the inner wall of the upper side of the outer shell 30, correspondingly, the lower end of the pull rod 31 is tightly arranged in the movable iron core 33, and the upper end of the pull rod 31 movably penetrates through the static iron core 34, is sealed and movably stretches out of the upper side of the outer shell 30; the return spring 35 is sleeved outside the pull rod 31, and the upper and lower ends of the return spring 35 are respectively elastically abutted between the movable iron core 33 and the static iron core 34.

In this embodiment, preferably, as shown in fig. 1 to 3, the insulator 5 adopts a labyrinth structure, and the labyrinth structure is specifically: the insulating base body part 50 is vertically extended and is arranged with the screw 29 and the pull rod 31 in the same vertical center line, a circle of supporting edge 51 is formed by extending from the middle part of the outer wall of the insulating base body part 50 outwards in the transverse direction, a circle of upper insulating wall 52 is formed by extending from the upper surface of the periphery of the supporting edge 51 in the vertical upward inclination direction, and a circle of lower insulating wall 53 is formed by extending from the lower surface of the periphery of the supporting edge 51 in the vertical downward inclination direction, counter bores 54 are respectively arranged on the upper end and the lower end of the insulating base body part 50 in the middle, and the upper ends of the screw 29 and the pull rod 31 are respectively inserted into the two counter bores 54 correspondingly and cannot be separated from the two counter bores 54.

Further preferably, the two counter bores 54 are respectively defined as an upper counter bore and a lower counter bore, the screw 29 is fixedly inserted into the upper counter bore, the upper end of the pull rod 31 is movably inserted into the lower counter bore up and down, and the upper end of the pull rod 31 is limited to move up and down in the lower counter bore.

Further, for "the screw 29 is fixedly inserted into the upper counterbore", there may be various embodiments according to production requirements, and the following only exemplifies one embodiment, specifically: the screw 29 is molded into the upper counterbore of the insulator 5 by a casting process. For "the upper end of the pull rod 31 can be inserted into the lower counterbore with limited up-and-down movement", there may be various embodiments according to different production requirements, and the following only exemplifies one embodiment, specifically: a nut B55 is embedded in the lower counter bore, the upper end of the pull rod 31 is movably inserted in the nut B55, a spring 56 is arranged between the upper end of the pull rod 31 and the top wall of the nut B55, and a baffle ring 57 for stopping and limiting the upper end of the pull rod 31 is arranged in an opening at the bottom of the nut B55.

In this embodiment, as shown in fig. 1 to 3, the insulating sleeve 6 is preferably a hollow convex structure with an upper opening and a lower opening. And combine in the concrete structure of above-mentioned electromagnetic drive mechanism 3 and insulator 5, the concrete mounting structure of insulating cover 6 is: the insulating sleeve 6 is tightly sleeved on the outer wall of the outer shell 30, and meanwhile, the insulating sleeve 6 is tightly attached to the inner wall of the insulating shell 1; in addition, the upper end of the insulating sheath 6 is also interposed between the lower portion of the insulating base portion 50 and the lower insulating wall 53, so that the insulating sheath 6 forms a reinforced insulating structure together with the insulator 5.

In addition, in this embodiment, as shown in fig. 1 and fig. 2, preferably, the unipolar ac vacuum contactor further has a wire inlet busbar 7 serving as a wire inlet connection end, and a flexible connection wire 8 (or referred to as a copper bar flexible connection wire) serving as a wire outlet connection end, where one end of the wire inlet busbar 7 is detachably and fixedly connected to the upper end of the static conductive rod 24 and the top wall of the insulating housing 1 (i.e. one end of the wire inlet busbar 7 and the upper end of the static conductive rod 24 are screwed together on the top wall of the insulating housing 1), and the other end of the wire inlet busbar 7 extends out of the side wall of the insulating housing 1 in a sealing manner; one end of the flexible connecting wire 8 is fixedly sleeved on the lower end of the movable conducting rod 25, and the other end of the flexible connecting wire 8 extends out of the side wall of the insulating shell 1 in a sealing manner and is fixedly connected with the outer wall of the insulating shell 1 at the same time.

Furthermore, according to the wiring layout requirement, the other end of the soft connection wire 8 and the other end of the incoming line busbar 7 are arranged in a back-to-back manner.

Preferably, as shown in fig. 1, a mounting cavity shell A9 communicated with the inner cavity of the insulating housing 1 is integrally formed at the lower part of the outer wall of the side wall of the insulating housing 1, a power control module 10 is accommodated in the mounting cavity shell A9, and a PWM chopper circuit controlled by a single-chip microcomputer (which belongs to a classical circuit well known to those skilled in the art, and therefore, the specific circuit structure is not described in detail) is integrated in the power control module 10, so that the coil core assembly in the electromagnetic driving mechanism 3 can be driven to perform contactless switching control when the switching-on and the working state are maintained. Compared with the traditional clapping electromagnet coil structure, the contactless switching control can ensure that the electromagnetic driving mechanism realizes the technical characteristics of low starting and maintaining power, simple and stable structure and the like, can avoid mechanism clamping stagnation and coil burnout caused by foreign matter invasion, and improves the performance of the contactor; therefore, the improvement of the power supply control module also provides a certain technical support and technical guarantee for realizing the miniaturization design of the contactor product.

In addition, the circuit interface of the power control module 10 (specifically, the external 14-bit phoenix terminal plug-in used as the secondary circuit interface) is located outside the same side of the insulating housing 1 as the other end of the flexible wire 8, that is, all located in front of the insulating housing 1, as is apparent from fig. 1 and fig. 4.

Preferably, as shown in fig. 4, two installation cavity shells B11 which are respectively communicated with the inner cavities of the installation cavity shells B are integrally formed at the lower part of the outer wall of the side wall of the insulating housing 1, the two installation cavity shells B are of an open structure, a user can intuitively see the working condition of the internal devices of the installation cavity shells B, the two installation cavity shells B11 are also oppositely and symmetrically arranged, the two installation cavity shells B11 are respectively accommodated with an auxiliary switch 12, and the auxiliary switch 12 belongs to the conventional configuration in the contactor, so that whether the contact is contacted or not and whether the stroke is in place can be more intuitively observed from the outside by virtue of the two auxiliary switches 12. In addition, both of the installation cavity cases B11 are also not on the same side of the insulating case 1 as the installation cavity case A9, but the wiring of both of the auxiliary switches 12 is led out to the front of the insulating case 1.

In addition, the connection relationship between the two auxiliary switches 12 and the tie rod 31 will be described in addition: the lower end of the pull rod 31 extends out of the movable iron core 33, and an auxiliary movable contact 36 is fixedly connected to the lower end of the pull rod 31, as shown in fig. 1 and fig. 3, the auxiliary movable contact 36 is also located below the contact point of the two auxiliary switches 12, so that when the pull rod 31 moves up and down, the auxiliary movable contact 36 can be driven to contact or disconnect from the two auxiliary switches 12.

In summary, the monopole type high-voltage alternating current vacuum contactor has the advantages of small overall size/occupation area, light weight, reasonable structural layout, low manufacturing cost, high protection level, excellent insulating performance and the like, and has good market prospect.

In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The foregoing description is only of a preferred embodiment of the utility model, which can be practiced in many other ways than as described herein, so that the utility model is not limited to the specific implementations disclosed above. While the foregoing disclosure has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes and modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model without departing from the technical solution of the present utility model still falls within the scope of the technical solution of the present utility model.

Claims (13)

1. The utility model provides a monopole type high-voltage alternating current vacuum contactor based on miniaturized design, includes insulating housing (1), vacuum interrupter (2) and electromagnetic drive mechanism (3), vacuum interrupter (2) with electromagnetic drive mechanism (3) are the relative setting in upper and lower in insulating housing (1), just electromagnetic drive mechanism (3) can drive moving contact (20) in vacuum interrupter (2) are linked together or are disconnected with stationary contact (21); the method is characterized in that: solid insulation structures are respectively arranged between the outer wall of the vacuum arc-extinguishing chamber (2) and the inner wall of the insulation shell (1), between the input end of the vacuum arc-extinguishing chamber (2) and the output end of the electromagnetic driving mechanism (3), and between the outer wall of the electromagnetic driving mechanism (3) and the inner wall of the insulation shell (1).

2. The miniaturized design-based single-pole high-voltage alternating-current vacuum contactor according to claim 1, wherein: the three solid insulation structures are not identical.

3. The miniaturized design-based single-pole high-voltage alternating-current vacuum contactor according to claim 2, wherein: the solid insulation structure arranged between the outer wall of the vacuum arc-extinguishing chamber (2) and the inner wall of the insulation shell (1) is defined as a first solid insulation structure, the first solid insulation structure is a silica gel insulation layer (4), and the silica gel insulation layer (4) is fixedly formed between the outer wall of the vacuum arc-extinguishing chamber (2) and the inner wall of the insulation shell (1) through a potting process.

4. A miniaturized design based single pole high voltage ac vacuum contactor according to claim 3 wherein: the vacuum arc-extinguishing chamber (2) is further provided with a sealing shell (22), wherein the sealing shell (22) is arranged in the upper part of the inner cavity of the insulating shell (1) and is arranged with the insulating shell (1) in the same vertical central line, and the silica gel insulating layer (4) is respectively encapsulated between the outer wall of the side wall of the sealing shell (22) and the upper part of the inner wall of the side wall of the insulating shell (1) and between the outer wall of the top wall of the sealing shell (22) and the inner wall of the top wall of the insulating shell (1).

5. A miniaturized design based single pole high voltage ac vacuum contactor according to claim 3 wherein: the solid insulation structure arranged between the input end of the vacuum arc extinguish chamber (2) and the output end of the electromagnetic driving mechanism (3) is defined as a second solid insulation structure, the second solid insulation structure is an insulator (5) made of insulating materials, and the upper end and the lower end of the insulator (5) are respectively sleeved on the input end of the vacuum arc extinguish chamber (2) and the output end of the electromagnetic driving mechanism (3).

6. The miniaturized design-based single-pole high-voltage alternating-current vacuum contactor of claim 5, wherein: the vacuum arc extinguishing chamber (2) is also provided with a sealing shell (22) and a movable conducting rod (25), wherein the sealing shell (22) is arranged in the upper part of an inner cavity of the insulating shell (1) and is arranged with the insulating shell (1) in the same vertical central line, and the silica gel insulating layer (4) is encapsulated between the outer wall of the sealing shell (22) and the inner wall of the insulating shell (1); the movable conducting rod (25) is also arranged with the insulating shell (1) in the same vertical central line, the upper end of the movable conducting rod (25) is arranged in the sealing shell (22) and is fixedly connected with the movable contact (20), the lower end of the movable conducting rod (25) is sealed and movably stretches out of the lower side of the sealing shell (22), a screw rod (29) which is arranged with the movable conducting rod in the same vertical central line is detachably and fixedly connected with the lower end of the movable conducting rod (25), and the screw rod (29) is the input end of the vacuum arc extinguishing chamber (2);

the electromagnetic driving mechanism (3) is provided with an outer shell (30), a coil iron core assembly and a pull rod (31), wherein the outer shell (30) is arranged in the lower part of an inner cavity of the insulating shell (1) in an embedded manner and is also arranged with the insulating shell (1) in the same vertical central line, and the coil iron core assembly is arranged in the outer shell (30) in an embedded manner and is used for generating electromagnetic attraction force; the pull rod (31) extends vertically and is also arranged with the insulating shell (1) in the same vertical central line, the lower end of the pull rod (31) is in transmission connection with the coil iron core assembly, the upper end of the pull rod (31) is sealed and movably extends out of the upper side of the shell body (30), and the upper end of the pull rod (31) is the output end of the electromagnetic driving mechanism (3);

the upper end and the lower end of the insulator (5) are respectively sleeved on the upper ends of the screw rod (29) and the pull rod (31).

7. The miniaturized design-based single-pole high-voltage alternating-current vacuum contactor of claim 6, wherein: the insulator (5) is provided with an insulating base body part (50) which extends vertically and is arranged with the screw rod (29) and the pull rod (31) along the same vertical central line, a circle of supporting edges (51) which are formed by extending from the middle part of the outer wall of the insulating base body part (50) outwards along the transverse direction, a circle of upper insulating walls (52) which are formed by extending from the upper surface of the periphery of the supporting edges (51) upwards in the vertical direction, and a circle of lower insulating walls (53) which are formed by extending from the lower surface of the periphery of the supporting edges (51) downwards in the vertical direction in the inclined mode, counter bores (54) are respectively arranged at the upper end and the lower end of the insulating base body part (50) in the middle, and the screw rod (29) and the upper end of the pull rod (31) are respectively inserted into the two counter bores (54) correspondingly, so that the two counter bores (54) cannot be separated.

8. The miniaturized design-based single-pole high-voltage alternating-current vacuum contactor of claim 7, wherein: defining the solid insulation structure arranged between the outer wall of the electromagnetic driving mechanism (3) and the inner wall of the insulation shell (1) as a third solid insulation structure, wherein the third solid insulation structure is an insulation sleeve (6) made of insulation materials, the insulation sleeve (6) is tightly sleeved on the outer wall of the shell body (30), and meanwhile, the insulation sleeve (6) is tightly attached to the inner wall of the insulation shell (1); in addition, the upper end of the insulating sleeve (6) is also inserted between the lower part of the insulating base body part (50) and the lower insulating wall (53), so that the insulating sleeve (6) and the insulator (5) form an enhanced insulating structure together.

9. The miniaturized design-based single-pole high-voltage alternating-current vacuum contactor of claim 8, wherein: the insulating sleeve (6) is a hollow convex-shaped structure body with upper and lower openings.

10. The miniaturized design-based single-pole high-voltage alternating-current vacuum contactor according to claim 1, wherein: the insulating shell (1) is of a hollow truncated cone structure made of an insulating thermoplastic composite material.

11. The miniaturized design-based single-pole high-voltage alternating-current vacuum contactor of claim 6, wherein: the vacuum arc extinguishing chamber (2) is also provided with a static conductive rod (24), the static conductive rod (24) and the movable conductive rod (25) are arranged in the same vertical central line, the lower end of the static conductive rod (24) is fixedly connected with the static contact (21), and the upper end of the static conductive rod (24) is detachably and fixedly connected with the top wall of the insulating shell (1) after penetrating through the top wall of the sealing shell (22) in a sealing way;

the monopole type high-voltage alternating current vacuum contactor is further provided with an incoming line busbar (7) serving as an incoming line connecting end and a flexible wire (8) serving as an outgoing line connecting end, wherein one end of the incoming line busbar (7) is detachably and fixedly connected with the upper end of the static conducting rod (24) and the top wall of the insulating shell (1) respectively, and the other end of the incoming line busbar (7) extends out of the side wall of the insulating shell (1) in a sealing manner; one end of the flexible connecting wire (8) is fixedly sleeved on the lower end of the movable conducting rod (25), and the other end of the flexible connecting wire (8) extends out of the side wall of the insulating shell (1) in a sealing manner and is fixedly connected with the outer wall of the insulating shell (1) at the same time.

12. The miniaturized design-based single-pole high-voltage alternating-current vacuum contactor of claim 11, wherein: an installation cavity shell A (9) communicated with the inner cavity of the insulation shell (1) is integrally formed at the lower part of the outer wall of the side wall of the insulation shell, and a power supply control module (10) is accommodated in the installation cavity shell A (9);

in addition, the circuit interface of the power supply control module (10) and the other end of the soft connecting wire (8) are positioned outside the same side of the insulating shell (1).

13. The miniaturized design-based single-pole high-voltage ac vacuum contactor of claim 12 wherein: two installation cavity shells B (11) which are respectively communicated with the inner cavities of the two installation cavity shells B are integrally formed at the lower part of the outer wall of the side wall of the insulating shell (1), the two installation cavity shells B (11) are oppositely and symmetrically arranged, and auxiliary switches (12) are respectively accommodated in the two installation cavity shells B (11); in addition, both of the installation cavity cases B (11) are not on the same side of the insulating housing (1) as the installation cavity case a (9).