Bypass switch with auxiliary contact

Abstract

The utility model discloses a bypass switch with an auxiliary contact, which comprises a pull rod and a driving mechanism used for driving the pull rod to move along the axial direction, and the pull rod is provided with a first end part outwards extending out of one end face of the bypass switch. An auxiliary contact device is installed on one end face of the bypass switch and located beside the first end portion, the auxiliary contact device comprises an auxiliary switch and a transmission part, and when the pull rod moves, the auxiliary switch can be triggered through the transmission part so that switching of the on-off state of the auxiliary switch can be achieved. According to the utility model, the pull rod drives the transmission piece to trigger the auxiliary switch, so that the reliable action of the auxiliary switch can be ensured, the false triggering or non-triggering condition is reduced, the stability and reliability of monitoring the working state of the main contact are improved, the structure is simple, and the installation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to switch device technical field, especially involve a bypass switch with auxiliary contact. BACKGROUND

[0002] In modern electrical system, switch device plays a vital role, for controlling the on-off of circuit and the distribution of electric energy. With the increasing complexity of electrical system and the continuous improvement of reliability requirements, the traditional bypass switch gradually exposes some limitations in practical application. In the past power transmission and distribution industry, the design of bypass switch is often relatively simple, lacking auxiliary contact, which leads to the inability to accurately and timely obtain the state information of the switch during the operation of the switch, bringing difficulties to the monitoring and fault diagnosis of the system.

[0003] With the rapid development of power transmission and distribution industry, higher requirements are put forward for the reliability of bypass switch, which needs to have auxiliary contact that can feedback the state of main contact. The auxiliary contact can real-time feedback the on-off state of main contact, and can feedback the abnormality such as sticking of main contact. At the same time, the auxiliary contact needs to be isolated from the main contact to meet the electrical safety requirements.

[0004] At present, although there are bypass switches with auxiliary contact function in the market, the auxiliary contact of the existing bypass switch is generally used in cooperation with the hand rod for opening. That is, when the electromagnetic drive is closed, the hand rod moves with the pull rod to trigger the auxiliary switch; when the hand rod is manually pushed to open, the hand rod leaves the auxiliary switch, thereby realizing the switching of the opening and closing state of the auxiliary switch. Because the installation structure of the hand rod and its cooperation structure with the pull rod allow it to have a certain amount of shaking, the hand rod and the auxiliary switch are prone to unstable contact, which reduces the reliability of monitoring the working state of the bypass switch. Therefore, it is necessary to improve the existing technology to overcome the defects in the prior art. CONTENT OF THE UTILITY MODEL

[0005] The problem to be solved by the utility model is to provide a bypass switch with auxiliary contact to overcome the defects of low stability and reliability of the auxiliary contact of the existing bypass switch.

[0006] The utility model adopts the technical scheme that in order to solve the technical problem, a bypass switch with auxiliary contact comprises a pull rod and a driving mechanism for driving the pull rod to move along the axial direction. The pull rod has a first end part extending outward from one end surface of the bypass switch, and an auxiliary contact device is installed on the one end surface of the bypass switch beside the first end part. The auxiliary contact device comprises an auxiliary switch and a transmission part. When the pull rod moves, the transmission part can trigger the auxiliary switch to realize the switching of the opening and closing state of the auxiliary switch.

[0007] As a further improvement of the utility model, the auxiliary contact device further includes an auxiliary opening bracket fixed on one end face of the bypass switch, the transmission member is pivotally installed on the auxiliary opening bracket, and the pull rod drives the transmission member to pivot to touch the auxiliary switch when moving.

[0008] As a further improvement of the utility model, the transmission member is provided with a first rotating arm and a second rotating arm, and the first rotating arm and the second rotating arm are distributed in a V shape.

[0009] As a further improvement of the utility model, the end portion of the first rotating arm is arranged opposite to the contact of the auxiliary switch, an auxiliary opening retainer ring is arranged on the first end portion, the end portion of the second rotating arm extends below the auxiliary opening retainer ring, the auxiliary opening retainer ring is used to push the second rotating arm to make the transmission member pivot when following the movement of the pull rod, and in turn the first rotating arm is used to press the contact.

[0010] As a further improvement of the utility model, two lugs are arranged side by side on the auxiliary opening bracket, and the transmission member is installed between the two lugs through a pivot.

[0011] As a further improvement of the utility model, the auxiliary contact device is provided with a plurality of auxiliary opening retainer rings distributed around the first end portion.

[0012] As a further improvement of the utility model, the driving mechanism includes an electromagnetic driving closing mechanism, the electromagnetic driving closing mechanism includes a static iron core, a moving iron core and a coil winding, the moving iron core is arranged opposite to the static iron core, the moving iron core is fixedly connected with the pull rod, a spring is installed between the moving iron core and the static iron core, and the moving iron core is used to drive the pull rod to move when the coil winding is powered.

[0013] As a further improvement of the utility model, the static iron core includes an iron core top plate and an iron core column integrally arranged at the bottom of the iron core top plate, and the coil winding is sleeved on the iron core column; the electromagnetic driving closing mechanism further includes a permanent magnet ring sleeved on the outer side of the moving iron core, and the static iron core and the moving iron core can be attracted together by overcoming the elastic force of the spring under the action of the magnetic field generated by the permanent magnet ring.

[0014] As a further improvement of the utility model, the bypass switch further includes a magnetic conduction cylinder fixedly connected to the iron core top plate and a magnetic conduction plate capped at one end of the magnetic conduction cylinder, the iron core column, the moving iron core, the coil winding and the permanent magnet ring are all located inside the magnetic conduction cylinder, and a magnetic conduction ring is installed between the moving iron core and the permanent magnet ring.

[0015] As a further improvement of the utility model, the driving mechanism further comprises a manual driving opening and closing mechanism, the manual driving opening and closing mechanism comprises a hand opening and closing rod and an opening and closing support, the opening and closing support is fixedly installed on the magnetic conducting plate, one end of the hand opening and closing rod is pivotally connected to the opening and closing support; the pull rod further has a second end portion extending outwardly from the magnetic conducting plate, two interval limiting baffles are arranged on the second end portion, and the middle part of the hand opening and closing rod is between the two limiting baffles.

[0016] The utility model discloses a kind of bypass switches with auxiliary contact, and the auxiliary switch is touched by pull rod driving transmission member, since the total stroke of pull rod is fixed, the position and force of auxiliary switch touched by pull rod through transmission member are relatively stable each time, can guarantee that auxiliary switch reliably acts, reduce the situation of false triggering or not triggering, to improve the stability and reliability of main contact working state monitoring;Meanwhile, auxiliary contact device can not only stably contact auxiliary switch by using V-shaped transmission member, need not complex mechanical structure, structure is relatively simple, and transmission member and auxiliary opening support adopt modular design, also facilitate installation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the perspective view of the bypass switch with auxiliary contact of the utility model;

[0018] Figure 2 It is the sectional view of the bypass switch with auxiliary contact of the utility model;

[0019] Figure 3 It is the perspective view of the pull rod and auxiliary contact device in the utility model;

[0020] Figure 4 It is the exploded view of the pull rod and auxiliary contact device in the utility model.

[0021] In combination with the drawings, the following description is made:

[0022] 1, pull rod; 101, first end portion; 102, second end portion; 103, limiting baffle; 2, auxiliary switch; 201, contact; 3, transmission member; 301, first rotating arm; 302, second rotating arm; 4, auxiliary opening support; 5, auxiliary opening baffle ring; 6, pivot; 7, static iron core; 701, iron core top plate; 702, iron core column; 8, moving iron core; 9, coil winding; 10, spring; 11, permanent magnet ring; 12, magnetic conducting cylinder; 13, magnetic conducting plate; 14, magnetic conducting ring; 15, hand opening and closing rod; 16, opening and closing support. DETAILED DESCRIPTION

[0023] The preferred embodiment of the utility model is described in detail in combination with the drawings.

[0024] Refer toFigures 1 to 4 The utility model provides a bypass switch with auxiliary contact, include: pull rod 1 and drive mechanism, pull rod 1 is used for with the main contact in circuit connection, drive mechanism is used for driving pull rod 1 and drives the main contact axial movement to realize the switching of circuit's break and close state.

[0025] Wherein, pull rod 1 has a first end 101 that extends outward from one end face of the bypass switch. It should be noted that the end face of the bypass switch in this embodiment is the top surface of the static core 7. An auxiliary contact device is mounted on the end face of the bypass switch beside the first end 101. The auxiliary contact device includes an auxiliary switch 2 and a transmission member 3. When the drive mechanism drives the pull rod 1 to move, the transmission member 3 can act to trigger the auxiliary switch 2, thereby achieving the switching of the opening and closing state of the auxiliary switch 2.

[0026] The utility model drives the transmission member 3 to trigger the auxiliary switch 2 through the pull rod 1. Since the total stroke of the pull rod 1 is fixed, the pull rod 1 does not have a shaking condition. Therefore, the position and force of the pull rod 1 to trigger the auxiliary switch 2 through the transmission member 3 are relatively stable each time, which can ensure that the auxiliary switch 2 reliably operates and reduce the condition of false triggering or not triggering, thereby improving the stability and reliability of monitoring the working state of the main contact.

[0027] Further, the auxiliary contact device further includes an auxiliary switch bracket 4 fixed on the end face of the bypass switch. Two lugs are arranged side by side on the auxiliary switch bracket 4. The transmission member 3 is pivotably mounted between the two lugs through a pivot shaft 6. When the pull rod 1 moves, it drives the transmission member 3 to pivot around the pivot shaft 6 to trigger the auxiliary switch 2.

[0028] Specifically, the transmission member 3 is provided with a shaft sleeve portion, a first rotating arm 301, and a second rotating arm 302. The shaft sleeve portion is sleeved on the pivot shaft 6. The first rotating arm 301 and the second rotating arm 302 are integrally connected to the shaft sleeve portion. The first rotating arm 301 and the second rotating arm 302 are distributed in a V shape.

[0029] In the utility model, the first end 101 is provided with an auxiliary switch stop ring 5. The auxiliary switch stop ring 5 can be a gasket and is fixed on the top of the first end 101 by a screw.

[0030] Figure 2 As shown is a cross-sectional view of the bypass switch in the open state. In the open state, the end of the first rotating arm 301 extends downward to be horizontally opposite to the contact 201 of the auxiliary switch 2. The end of the second rotating arm 302 extends transversely below the auxiliary switch stop ring 5. When the drive mechanism drives the pull rod 1 to move downward for closing, the auxiliary switch stop ring 5 can push the second rotating arm 302 to make the transmission member 3 pivot when it moves with the pull rod 1. Then, the first rotating arm 301 is pressed against the contact 201, thereby achieving the switching of the opening and closing state of the auxiliary switch 2.

[0031] For example, the auxiliary switch 2 can be a limit switch, micro switch, etc., and can be selected as normally open, normally closed, or a combination of normally open and normally closed as needed.

[0032] Preferably, both the transmission component 3 and the auxiliary switch bracket 4 are made of insulating plastic material, which can effectively isolate the auxiliary switch 2 from the high-voltage end to meet electrical safety requirements.

[0033] The auxiliary contact device in this utility model can stably contact the auxiliary switch 2 by using a V-shaped transmission component 3. It does not require a complex mechanical structure and has a relatively simple structure. Moreover, the transmission component 3 and the auxiliary switch bracket 4 adopt a modular design, which is also convenient for installation.

[0034] It is worth mentioning that multiple auxiliary contact devices can be provided in this utility model. The multiple auxiliary contact devices are distributed around the first end 101, and the transmission component 3 in the multiple auxiliary contact devices can be driven simultaneously by the pull rod 1. In this embodiment, two auxiliary contact devices are specifically provided, and the two auxiliary contact devices are symmetrically distributed on the left and right. Even if one of the auxiliary switches 2 fails, the other auxiliary switches 2 can work normally, thereby enabling more reliable monitoring of the working status of the main contact.

[0035] Furthermore, the driving mechanism in this utility model includes an electromagnetic drive closing mechanism, which includes a stationary iron core 7, a moving iron core 8, a coil winding 9, and a permanent magnet ring 11. The moving iron core 8 is arranged opposite to the stationary iron core 7, and the moving iron core 8 is fixedly connected to the pull rod 1. At the same time, a spring 10 is installed between the moving iron core 8 and the stationary iron core 7. The moving iron core 8 is used to drive the pull rod 1 to move when the coil winding 9 is energized.

[0036] The moving iron core 8 has a threaded hole along its axis, and the middle part of the pull rod 1 is fixedly connected to the threaded hole of the moving iron core 8 by means of threads. The first end 101 of the pull rod 1 extends upward through the center hole of the stationary iron core 7.

[0037] like Figure 2 As shown, the stationary iron core 7 includes an iron core top plate 701 and an iron core column 702 integrally disposed at the bottom of the iron core top plate 701. The moving iron core 8 is located below the iron core column 702. The coil winding 9 is mounted on the iron core column 702. The permanent magnet ring 11 is mounted on the outside of the moving iron core 8. A magnetic guide ring 14 is installed between the permanent magnet ring 11 and the moving iron core 8. The magnetic guide ring 14 is used to enhance the strength of the magnetic field.

[0038] In addition, the bypass switch also includes a magnetic cylinder 12 fixedly connected to the top plate 701 of the iron core and a magnetic plate 13 covering the lower end of the magnetic cylinder 12. The iron core column 702, the moving iron core 8, the coil winding 9, the permanent magnet ring 11 and the magnetic ring 14 are all located inside the magnetic cylinder 12.

[0039] In the embodiment, the permanent magnet ring 11 is radially magnetized, that is, the N and S poles are distributed on the inner and outer rings, and the permanent magnet ring 11 can be integrated or spliced by several magnetic tiles. The magnetic field generated by the permanent magnet ring 11 can form a closed magnetic loop among the permanent magnet ring 11, the magnetic conducting cylinder 12, the static iron core 7, the moving iron core 8 and the magnetic conducting ring 14, and the static iron core 7 and the moving iron core 8 can be attracted together against the elastic force of the spring 10 under the magnetic field generated by the permanent magnet ring 11.

[0040] When the coil winding 9 is powered, the coil winding 9 can generate a magnetic field opposite to the permanent magnet ring 11, so that the attraction between the static iron core 7 and the moving iron core 8 is weakened or even zero, at this time, the moving iron core 8 moves to the direction of the magnetic conducting plate 13 under the elastic force of the spring 10, and simultaneously drives the pull rod 1 to move, and the pull rod 1 drives the transmission member 3 to pivot through the auxiliary opening stop ring 5 when moving, so as to drive the auxiliary switch 2 to act, and realize the opening and closing switching of the auxiliary switch 2; after the moving iron core 8 contacts the magnetic conducting plate 13, under the joint action of the magnetic field of the permanent magnet ring 11 and the elastic force of the spring 10, the moving iron core 8 and the magnetic conducting plate 13 are kept in close contact, so as to realize the keeping of the opening and closing state of the auxiliary switch 2.

[0041] The electromagnetic drive closing method has the advantages of simple structure and fast action response speed.

[0042] In addition, the driving mechanism in the utility model still includes manual drive opening mechanism, and the manual drive opening mechanism includes hand opening rod 15 and opening support 16, the opening support 16 is fixedly installed at the bottom of the magnetic conducting plate 13, and one end of the hand opening rod 15 is pivotally connected to the opening support 16; the pull rod 1 further has a second end 102 extending outward from the magnetic conducting plate 13, two interval limiting baffle plates 103 are arranged on the second end 102, and the middle part of the hand opening rod 15 is between the two limiting baffle plates 103.

[0043] When opening is needed, the coil winding 9 is in a power-off state, the pull rod 1 is pushed by the hand opening rod 15 to manually open, and when the moving iron core 8 contacts the static iron core 7, the permanent magnetic field attraction between the moving iron core 8 and the static iron core 7 is greater than the counterforce of the spring 10, so that the bypass switch is kept open under the action of the magnetic field of the permanent magnet ring 11; in the process, the pull rod 1 drives the auxiliary opening stop ring 5 to reset, and the transmission member 3 is no longer pressed, and the auxiliary switch 2 realizes opening and closing switching and keeping under the action of the counterforce.

[0044] Since the opening and closing states of the utility model are kept by the permanent magnetic field provided by the permanent magnet ring 11, and the coil winding 9 is only powered for a moment or a very short time, the double-stable permanent magnetic keeping is realized, and safety and energy saving are achieved.

[0045] Therefore, the bypass switch with auxiliary contact point disclosed by the utility model can drive the auxiliary switch 2 through the transmission member 3 driven by the pull rod 1, and the position and force of the auxiliary switch 2 are relatively stable every time the pull rod 1 drives the auxiliary switch 2 through the transmission member 3, so that the auxiliary switch 2 can reliably act, the mis-triggering or non-triggering condition is reduced, and the stability and reliability of the main contact point working state monitoring are improved; meanwhile, the auxiliary contact point device adopts the V-shaped transmission member 3, so that the auxiliary switch 2 can be stably contacted, a complex mechanical structure is not needed, the structure is relatively simple, and the transmission member 3 and the auxiliary support 4 are modularized, so that the installation is facilitated.

[0046] In the foregoing description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the above description is merely a preferred embodiment of the present application, and the present application can be implemented in many different ways other than those described herein, and therefore the present application is not limited by the above disclosed specific implementation. Meanwhile, any person skilled in the art can make many possible changes and modifications to the technical solution of the present application, or modify it into equivalent embodiments, by using the disclosed methods and technical contents, without departing from the scope of the technical solution of the present application. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the content of the technical solution of the present application, still belongs to the protection scope of the technical solution of the present application.

Claims

1. A bypass switch with auxiliary contacts, comprising a pull rod (1) and a drive mechanism for driving the pull rod (1) in axial movement, characterized in that: The pull rod (1) has a first end portion (101) extending outwardly from an end surface of the bypass switch, and an auxiliary contact device is mounted on the end surface of the bypass switch beside the first end portion (101), the auxiliary contact device comprising an auxiliary switch (2) and a transmission member (3), the auxiliary switch (2) being actuated by the transmission member (3) when the pull rod (1) moves, so as to switch the auxiliary switch (2) between the on and off states.

2. The bypass switch with auxiliary contacts according to claim 1, characterized in that: The auxiliary contact device further comprises an auxiliary switch bracket (4) fixed on the end surface of the bypass switch, and the transmission member (3) is pivotally mounted on the auxiliary switch bracket (4), and the pull rod (1) drives the transmission member (3) to pivot when moving, so as to actuate the auxiliary switch (2).

3. The bypass switch with auxiliary contacts according to claim 2, characterized in that: The transmission member (3) is provided with a first rotating arm (301) and a second rotating arm (302), and the first rotating arm (301) and the second rotating arm (302) are distributed in a V shape.

4. The bypass switch with auxiliary contacts according to claim 3, characterized in that: An end portion of the first rotating arm (301) is arranged opposite to a contact (201) of the auxiliary switch (2), an auxiliary switch retainer ring (5) is arranged on the first end portion (101), and an end portion of the second rotating arm (302) extends below the auxiliary switch retainer ring (5), the auxiliary switch retainer ring (5) being used to push the second rotating arm (302) to pivot the transmission member (3) when following the movement of the pull rod (1), and in turn drive the first rotating arm (301) to press against the contact (201).

5. The bypass switch with auxiliary contacts of claim 2, wherein: The auxiliary switch bracket (4) is provided with two lugs arranged side by side, and the transmission member (3) is mounted between the two lugs by a pivot (6).

6. The bypass switch with auxiliary contacts of claim 1, wherein: The auxiliary contact device is provided with a plurality of 7. The bypass switch with auxiliary contacts of claim 1, wherein: The driving mechanism comprises an electromagnetic drive closing mechanism, the electromagnetic drive closing mechanism comprising a static core (7), a moving core (8) and a coil winding (9), the moving core (8) being arranged opposite to the static core (7), and the moving core (8) being fixedly connected with the pull rod (1), and a spring (10) being mounted between the moving core (8) and the static core (7), the moving core (8) being used to drive the pull rod (1) to move when the coil winding (9) is electrified.

8. The bypass switch with auxiliary contacts according to claim 7, characterized in that: The static core (7) comprises a core top plate (701) and a core column (702) integrally arranged at the bottom of the core top plate (701), and the coil winding (9) is sleeved on the core column (702); the electromagnetic drive closing mechanism further comprises a permanent magnet ring (11) sleeved on the outer side of the moving core (8), and the static core (7) and the moving core (8) can be attracted together against the elastic force of the spring (10) under the action of the magnetic field generated by the permanent magnet ring (11).

9. The bypass switch with auxiliary contacts according to claim 8, characterized in that: The bypass switch further comprises a magnetic conducting cylinder (12) fixedly connected to the core top plate (701) and a magnetic conducting plate (13) arranged on one end of the magnetic conducting cylinder (12), and the core column (702), the moving core (8), the coil winding (9) and the permanent magnetic ring (11) are all located inside the magnetic conducting cylinder (12), and a magnetic conducting ring (14) is arranged between the moving core (8) and the permanent magnetic ring (11).

10. The bypass switch with auxiliary contacts of claim 9, wherein: The driving mechanism further comprises a manual driving opening mechanism, the manual driving opening mechanism comprises a hand opening lever (15) and an opening support (16), the opening support (16) is fixedly installed on the magnetic conducting plate (13), and one end of the hand opening lever (15) is pivotally connected to the opening support (16); the pull rod (1) further has a second end portion (102) extending outwardly from the magnetic conducting plate (13), two interval limiting baffles (103) are arranged on the second end portion (102), and the middle part of the hand opening lever (15) is located between the two limiting baffles (103).

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