CN101621188B

CN101621188B - Circuit breaker position indicating device of middle-high circuit breaker advancing mechanism

Info

Publication number: CN101621188B
Application number: CN 200910033901
Authority: CN
Inventors: 朱佳梦; 张福民; 杨俊�; 管瑞良
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2009-05-27
Filing date: 2009-05-27
Publication date: 2011-04-27
Anticipated expiration: 2029-05-27
Also published as: CN101621188A

Abstract

The invention relates to a circuit breaker position indicating device of middle-high circuit breaker advancing mechanism, which belongs to the technology field of circuit breakers. The advancing mechanism comprises a chassis with a panel and a screw rod, a first indicating stem hole is arranged on the panel, a second indicating stem hole is arranged on the chassis, the circuit breaker position indicating device comprises a supporting seat, a limit plate, a guide rod and an indicating stem, the supporting seat is fixed on the chassis, the limit plate is fixed on the circuit breaker and corresponds to the supporting seat, one end of the guide rod is arranged on the supporting seat and the other end is arranged on the limit plate in a penetrating way, the indicating stem is articulated on the supporting seat and is connected with the guide rod, the first indicating stem hole is stretched of the other end of the indicating stem, a first limit piece and a second limit piece are fixedly arranged on the guide rod and an energy storage mechanism is also arranged on the guide rod. The indicating device has advantages of being convenient for operators to view, improving the operating efficiency of the circuit breaker, avoiding the situation that working position or test position is not in place and preventing electricity of the advancing mechanism and the circuit breaker and the damage to the related components for interlocking the mechanism.

Description

The circuit breaker position indicating device of mesohigh circuit breaker propulsive mechanism

Technical field

The invention belongs to breaker technical field, be specifically related to a kind of circuit breaker position indicating device of mesohigh circuit breaker propulsive mechanism.

Background technology

The reason known as industry is called mesohigh with 1000 volts of above voltages usually, and the circuit breaker custom that therefore is used for 1000 volts of above power transmission and transformation lines is called the mesohigh circuit breaker.The function of mesohigh circuit breaker propulsive mechanism is to order about circuit breaker to move, and makes circuit breaker arrive service position or test position or changes between two positions.The structure of known mesohigh circuit breaker propulsive mechanism as shown in Figure 3.The applicant narrates its operation principle below in conjunction with this figure.

When operating personnel insert with the handle hole 3 of handle 1 from the panel 2 of propulsive mechanism, one end is probeed in the handle hole 3 and screw mandrel 7 that the other end and circuit breaker 4 connect when handling (clockwise or counterclockwise), screw mandrel 7 is just done clockwise or motion (rotation) counterclockwise, order about circuit breaker 4 and move, make circuit breaker 4 arrive service position or test positions or between two positions, change.When operating personnel shake screw mandrel 7 and make circuit breaker 4 abut to panel 2, screw mandrel 7 can not shake again, and circuit breaker 4 arrives test positions, when operating personnel shake screw mandrel 7 and make circuit breaker abut to pin 71 fixing on the screw mandrel 7, screw mandrel can not shake again, and circuit breaker 4 arrives the service position.Whether be in service position or test position definitely in order to hold circuit breaker, verify by the blocking lever 6 of propulsive mechanism usually.The shape of cross section of blocking lever 6 is a rectangle, and respectively be formed with the neck 5 of a cylindrical shape at the two ends of blocking lever 6, one end of blocking lever 6 (right-hand member shown in Figure 3) is placed through in the blocking lever hole 9 of the fixed head 8 that is fixed on the circuit breaker 4, blocking lever hole 9 is a rectangular opening, the other end of blocking lever 6 is that left end shown in Figure 3 is placed through in the through hole 10 on the aforesaid panel 2, and the end that is stuck in panel 2 at blocking lever 6 is installed with a pivoted arm 11, an end of sheathed hole sealing plate 13 on the little axle 12 of pivoted arm 11, the other end of hole sealing plate 13 and the inserting mutually of aforesaid handle hole 3.At control crank 1 and when making handle 1 do motion clockwise, screw mandrel 7 turns clockwise, circuit breaker 4 is moved to right (is example with location status shown in Figure 3), and when circuit breaker was shifted to the right to the degree that enters the service position, the neck 5 of blocking lever 6 right-hand members was corresponding to blocking lever hole 9.At this moment, when operating personnel allot handle 14 on the hole sealing plate 13 with finger, because neck 5 correspondences of blocking lever 6 right-hand members at 9 places, blocking lever hole, therefore can rotate blocking lever 6 through pivoted arm 11 by hole sealing plate 13, move more than hole sealing plate 13 gets, handle hole 3 is implemented shutoff.And if circuit breaker 4 does not fully arrive the service position, the neck 5 of blocking lever 6 right-hand members does not correspond to blocking lever hole 9 so, at this moment, even if the operator allots the handle 14 of hole sealing plate 13, because of blocking lever 6 can't rotate, on not understanding, moves hole sealing plate 13 and can not be handle hole 3 shutoff.Otherwise, when operating personnel make handle 1 towards counterclockwise operation, screw mandrel 7 is rotated counterclockwise so, circuit breaker 4 is moved to left, when circuit breaker moves left to the degree of test position, blocking lever hole 9 ability of fixed head 8 are corresponding to the neck 5 of blocking lever 6 left ends, at this moment, when operating personnel allot handle 14 on the hole sealing plate 13, by pivoted arm 11 blocking lever 6 is rotated by hole sealing plate 13, move more than hole sealing plate 13 gets, handle hole 3 is implemented shutoff.Yet, if circuit breaker 4 does not fully arrive test position, because of blocking lever 6 can't rotate, hole sealing plate 13 can not on move and can't be handle hole 3 shutoff.The effect that 13 pairs of handle holes of hole sealing plate 3 are implemented sealing is intended to prompting: when circuit breaker is in service position or test position, do not allow to operate, in order to avoid accidents caused.

As shown in the above description, for known mesohigh circuit breaker, operating personnel can only be by shaking screw mandrel 7 to not shaking perception circuit breaker 4 whether to arrive service position or test position or in the handoff procedure of two positions.Hole sealing plate 13 is being taken on the effect of switch, and whether it can depend on whether blocking lever 6 can rotate to handle hole 3 sealings, and whether blocking lever 6 can rotate and depend on whether circuit breaker 4 is in service position or test position.Obvious, whether prior art can be implemented to close to judge that circuit breaker is in service position or test position by repaying examination hole sealing plate 13 to handle hole 3, if hole sealing plate 13 can't be closed handle hole 3, show circuit breaker still no show service position or test position so, need continue to shake handle 1, vice versa.Thereby there is following extreme phenomenon: particularly because of the difference (strength size) of operating personnel's individual strength, with regard to the big relatively operator of strength, continuing to shake handle 1 for fear of having arrived service position or test position at circuit breaker causes parts to damage, therefore, often just shut-down operation when sensation handle 1 is stressed, (particularly when circuit breaker 4 begin to contact with the transmission of electricity fixed contact of external circuit and contact process in, circuit breaker is stressed very big) examination dials hole sealing plate 13 and sounds out, make and just can accomplish without any letup or claim one step completed action to end originally, influence operating efficiency; With regard to the weak relatively operator of strength,, need too the operation of hole sealing plate 13 is soundd out, so operating efficiency is affected equally in order to ensure that fully circuit breaker is in required service position or test position.Especially also there is following technical problem: when circuit breaker no show service position or test position and firmly by force during shutoff operation hole 3, not only can undermine shut 13, pivoted arm 14 and even blocking lever 6 and fixed head 8, but also can bring disaster to other parts of propulsive mechanism, and then influence is to whether put in place the judgement of (service position or test position) of circuit breaker, can occur when serious propulsive mechanism and circuit breaker electric, mechanical interlocking is unreliable, even can't action advances mechanism.

Analyze and think through the applicant, aforesaid existing extreme phenomenon and technical problem in fact all are owing to lack due to the visual indication, if being had, the propulsive mechanism of mesohigh circuit breaker discloses the indicating device that circuit breaker is in service position or test position, so aforesaid all unfavorable situations just can be eliminated, yet indicating device needs to be supported by practicable structure.For this reason, the applicant retrieves, and the phase is obtained the corresponding techniques enlightenment.In Fig. 5 of DE19619452A1, disclosed when circuit breaker arrives test position, pin on the screw mandrel moves to the right with the indentation, there promotion interlock plate that screw mandrel turns to interlock plate, because it is limited that interlock plate moves right, so screw mandrel can only shake the position shown in Figure 4 of this patent.When arriving the service position, the interlocking of the action of but direction of action identical with said apparatus by a cover is spacing.This patent can only still be no show service position or test position by shaking that screw mandrel comes the perception circuit breaker to be in the service position on earth or be in test position by operating personnel also.That is to say location indicating device not equally on the panel of the propulsive mechanism of this patent.Therefore, existing document does not provide any technology enlightenment that is used to indicate circuit breaker service position or test position.

Summary of the invention

Task of the present invention is to provide a kind of service position that can disclose circuit breaker or test position and uses and help operating personnel to observe, improve operating efficiency and avoid undermining the circuit breaker position indicating device of the mesohigh circuit breaker propulsive mechanism that the electric and mechanism of propulsive mechanism and circuit breaker interlocks.

Task of the present invention is finished like this, a kind of circuit breaker position indicating device of mesohigh circuit breaker propulsive mechanism, described propulsive mechanism comprises a frame with panel and an end bearing other end cooperates with circuit breaker on frame is used to order about the screw mandrel that circuit breaker moves, offer the first indicating arm hole on the panel, and on frame, offer the second indicating arm hole, first, the second indicating arm hole overlaps each other, described circuit breaker position indicating device comprises a supporting base, one limiting plate, one guide post and an indicating arm, supporting base is fixed on the described frame, limiting plate is fixed on the described circuit breaker and with supporting base and keeps corresponding, one end of guide post is located on the supporting base, the other end is located on the limiting plate, indicating arm is hinged on supporting base and an end also connects with guide post, the other end of indicating arm is corresponding to described first, in the second indicating arm hole, and lean out the first indicating arm hole, be installed with first on the described guide post, second locating part, first locating part is corresponding to a side of described limiting plate, and second locating part is corresponding to the opposite side of limiting plate, and also be equipped with a stored energy mechanism on guide post, the position of this stored energy mechanism on guide post is positioned at described supporting base.

In a specific embodiment of the present invention, have first on the described panel and observe district and second and observe the district, first, second observes a side or two ends that the district is positioned at the described first indicating arm hole, and wherein, first observes the district is positioned at second and observes the top of distinguishing.

In another specific embodiment of the present invention, described first observation is distinguished to have and is used to disclose the Word message that circuit breaker is in the service position, is used to disclose the Word message that circuit breaker is in test position and have in the described second observation district.

In another specific embodiment of the present invention, described supporting base is corresponding to the described second indicating arm hole, and supporting base has a support plate that is used for for described stored energy mechanism supporting, the described guide post that is installed with first, second locating part passes this support plate, the upper and lower end of supporting base respectively is formed with a kink, and each kink and described frame are fixed.

In another specific embodiment of the present invention, the bottom of described supporting base has the pair of pin axle bed, and described indicating arm is hinged on axis pin base by bearing pin, and indicating arm connects by connecting pin and described guide post.

Go back in the specific embodiment of the present invention, described stored energy mechanism comprises first, second spring and spring base, first, second spring all is nested with on described guide post, spring base is installed on the guide post and between first, second spring, one end bearing of described first spring is on described supporting base, the other end is bearing in a side of spring base, and an end bearing of described second spring is at the opposite side of spring base, and the other end is bearing on the described support plate.

More of the present invention and in specific embodiment, described first, second locating part is position-arresting disk or spacer pin.

In of the present invention and then specific embodiment, described spring base is backing pin or block plate.

Technical scheme provided by the present invention can be indicated the service position or the test position of circuit breaker by the indicating arm of circuit breaker position indicating device, thereby being convenient to operating personnel observes, both helped improving the efficient of operating breaker, help avoiding the situation that the circuit breaker service position is not in place or test position is not in place to take place again, help to prevent the damage of the associated components that the electric and mechanism of propulsive mechanism and circuit breaker interlocks in addition.

Description of drawings

Fig. 1 is one embodiment of the invention structure chart.

Fig. 2 is an application examples schematic diagram of the present invention.

Fig. 3 is the structure chart of the mesohigh circuit breaker propulsive mechanism in the prior art.

Embodiment

For the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present invention and beneficial effect more, the applicant general elaborates in conjunction with the accompanying drawings in the mode of embodiment below, but to the description of embodiment all is not restriction to the present invention program, any according to the present invention's design done only for pro forma but not substantial equivalent transformation all should be considered as technical scheme category of the present invention.

Embodiment:

Ask for an interview Fig. 1, provided the frame 1 of mesohigh circuit breaker propulsive mechanism, frame shown in the figure 1 is one piece of transverse slat of the support assembly of frame-type in fact, be fixed with a panel 11 at frame 1 coenvelope, on frame 1, offer the second indicating arm hole 12, on panel 11, offer the first indicating arm hole 111, first, second indicating arm hole the 111, the 12nd, (it is corresponding fully also can to claim both) that overlaps.Circuit breaker 2 is located in the support assembly of aforesaid frame-type, and it is mentioned promptly by identical in structure mechanism shown in Figure 3 in background technology with the applicant to have a cover between circuit breaker 2 and frame 1.

The circuit breaker position indicating device that provides as technical essential of the present invention, comprise a supporting base 3, limiting plate 4, a guide post 5 and an indicating arm 6, with illustrated location status is example, 3 sides towards limiting plate 4 of supporting base have a support plate 31, by first screw 311 shown in the figure that support plate 31 is fixing with supporting base 3, support plate 31 has a flanging 312, and is provided with one second guide post hole 3121 on flanging 312.By top explanation as can be known, support plate 31 and supporting base 3 respectively are parts independently, and both constitute one by first screw 311.Yet, if, be fine equally with support plate 31 and supporting base 3 integral productions.The upper and lower side of supporting base 3 respectively is bent with a kink 32, and a pair of kink 32 keeps corresponding, and is fixing with frame 1 with second screw 321, owing to the shape of cross section of frame 1 is " [" shape, so supporting base 3 is positioned at the " chamber of [" shape just.It is corresponding with the second guide post hole 3121 to offer 34, the three guide post holes 34, one the 3rd guide post hole in the portion on the lower side of supporting base 3.Limiting plate 4 usefulness the 3rd screw 42 is fixing with circuit breaker 2, and the side in the bottom of limiting plate 4 offers and the 3121 corresponding first guide post holes 41, the second guide post hole.Guide post 5 is arranged in the first, second, third

guide post hole

41,3121,34, one end of this guide post 5 is that illustrated left end leans out the 3rd guide post hole 34, and being illustrated right-hand member, the other end stretches out the first guide post hole 41, and on guide post 5, be installed with first, second locating

part

51,52, wherein, first locating part 51 is to occupy between aforesaid support plate 31 and the limiting plate 4 in the position on the guide post 5, and second locating part 52 is positioned at guide post 5 and is stretched over outer end, the first guide post hole 41.In the present embodiment, the position-arresting disk of selector disc shape (can be jump ring or back-up ring) if select for use spacer pin to fill the post of first, second locating

part

51,52, then is feasible as first, second locating

part

51,52 equally.When using position-arresting disk to make first, second locating

part

51,52, then preferably on guide post 5, be arranged with neck, position-arresting disk is positioned corresponding neck; When selecting for use spacer pin to fill the post of first, second locating

part

51,52, can on guide post 5, be drilled with limit pin hole so, spacer pin is solidly plugged in the corresponding limit pin hole.The top of indicating arm 6 one ends (diagram right-hand member) and the left end of guide post 5 connect, more particularly, connect with the left end that is stretched over the guide post 5 outside the 3rd guide post hole 34, bind mode is not limited to the mode that illustrated use connecting pin 62 connects, and indicating arm 6 is hinged on the pair of pin axle bed 33 of supporting base 3 by bearing pin 61; The other end of indicating arm 6 is that left end shown in Figure 1 is corresponding to second, third indicating arm hole 12,111 and lean out the first indicating arm hole 111.Drive indicating arm 6 motions by guide post 5, when being in, the position of indicating arm 6 on the first indicating arm hole 111 correspond to or when claiming to point to first on the panel 11 and observing district 112, the position that then shows circuit breaker 2 is in the service position, and on corresponding to panel 11 second when observing district 113, show that then the position of circuit breaker 2 shows as test position.Observe to be preset with in the district 112 aforesaid first and be used to disclose the Word message (being information) that circuit breaker is in the service position, literal or outer literal during Word message comprises, middle literal is as " service position ", and outer literal is as " Work ".With example, observe to be preset with in the district 113 second and be used to disclose the Word message that circuit breaker is in test position, literal or outer literal during Word message comprises, middle literal is as " test position ", and outer literal is as " Test ".The position that first, second that illustrate among Fig. 1 observed district 112,113 is not unique, because first, second observation window district 112,113 can be corresponded to the upper and lower in the first indicating arm hole 111 of strip respectively.

Please continue to see Fig. 1, on aforesaid guide post 5, also be provided with a stored energy mechanism 53, this stored energy mechanism 53 comprises first, second spring 531,532 and spring base 533 (also can claim the spring limit base), one end of first spring 531 is kept out on supporting base 3, the other end is kept out on the wall body of a side of spring base 533, one end of second spring 532 is kept out on the wall body of the opposite side of spring base 533, and the other end is kept out on aforesaid support plate 31.For spring base 533, equally both can adopt backing pin, also can adopt block plate, present embodiment is selected the latter.

As shown in the above description, indicating arm 6 can indicate circuit breaker to be in service position or test position on panel 11 clearly, still is in the position of shaking in (moving) process that do not put in place.Therefore, can protect mesohigh circuit breaker propulsive mechanism inner body effectively by the indication of indicating arm 6 and avoid and the interlocking of circuit breaker, cabinet can be not impaired because of misoperation.

Ask for an interview Fig. 2 and in conjunction with Fig. 1, the mode of operation of pressing known technology as the operator, promptly according to the applicant when the mode of operation described in the background technology makes screw mandrel 7 (Fig. 2 shows) rotation by handle, circuit breaker 2 just moves.Specific as follows described.

When operating personnel shake screw mandrel 7 and make circuit breaker 2 leave test position by handle, limiting plate 4 is with circuit breaker 2 motions, pressure or title that the left-hand face of limiting plate 4 (Fig. 1 is an example) discharges gradually to first locating part 51 stop, guide post 5 is first of stored energy mechanism 53, second spring 531, the direction motion of advancing towards circuit breaker 2 under 532 the equilibrant force effect, drive indicating arm 6 is done dextrorotation around connecting pin 61 (also can claim axle) then is left test position, promptly leave second and observe district 113, the centre of point test position and service position gradually, promptly progressively point to first, second observes district 112, between 113, leave test position to arriving before the service position at circuit breaker 2, guide post 5 is first, second spring 531, it is static that 532 equilibrant force effect keeps down, indicating arm 6 is in aforesaid state all the time, promptly is in first, second observes district 112,113 centre.

Along with screw mandrel 7 continues rotation, when circuit breaker 2 during near the service position, the rear surface of limiting plate 4 is that the right lateral surface of limiting plate 4 illustrated in figures 1 and 2 acts on second locating part 52, thereby pulling guide post 5 overcomes the equilibrant force of first, second spring 531,532 and moves right, and drives indicating arm 6 by guide post 5 and does the clockwise direction rotation around connecting pin 62.Finally,, insert in the external circuit, make first on the indicating arm 6 final sensing panels 11 observe district 112, disclose circuit breaker 2 and be in the service position when circuit breaker 2 arrives the transmission of electricity fixed contact positive engagement that the service position is contact 21 with the external circuit of circuit breaker 2.

When circuit breaker 2 leaves the service position, limiting plate 4 is with circuit breaker 2 motions (moving to left), under the equilibrant force effect of first, second spring 531,532, guide post 5 is to left movement, the centre of while indicating arm 6 sense of rotation test positions and service position, promptly point to the centre that first, second observes district 112,113, leave the service position to arriving before the test position at circuit breaker 2, it is static that guide post 5 keeps under the equilibrant force effect of first, second spring 531,532, and indicating arm 6 is in aforesaid first, second all the time and observes the centre in district 112,113.

Lasting rotation along with screw mandrel 7, when circuit breaker 2 during near test position, the left surface of limiting plate 4 acts on first locating part 51, thereby promotion guide post 5 overcomes the equilibrant force of first, second spring 531,532 and is moved to the left, and drives indicating arms 6 by guide post 5 and does counterclockwise to rotate around connecting pin 62.Finally, when circuit breaker 2 arrives test position, make the indicating arm 6 final second observation districts 113 that point on the panel 11, disclose circuit breaker 2 and be in test position.

Fairly obvious, no matter operating personnel are in the service position or the operating process of test position circuit breaker, the position that need not to worry circuit breaker 2 whether put in place and repeatedly examination dial by hole sealing plate shown in Figure 3 13, know as long as rely on the indicating positions of indicating arm 6 to examine.

Certainly, holding with being hinged of axis pin base 33 of indicating arm 6 also can be higher than the 3rd guide post hole 34, on the panel 11 first observed and distinguished being set to of the 112 and second observation district 113: the second observation district 113 is positioned at first observation and distinguishes 112 top, operating principle is with above-mentioned description, just the motion of guide post 5 drives the rotation direction of indicating arm 6 and the direction of rotation of foregoing description, that is, when guide post 5 moves right, drive indicating arm 6 and do counterclockwise to rotate around connecting pin 62; When guide post 5 is moved to the left, drives indicating arm 6 and do the clockwise direction rotation around connecting pin 62.

Claims

1. the circuit breaker position indicating device of a mesohigh circuit breaker propulsive mechanism, described propulsive mechanism comprises that the have panel frame (1) of (11) and an end bearing are used to order about the mobile screw mandrel (7) of circuit breaker (2) what frame (1) went up that the other end cooperates with circuit breaker (2), offer the first indicating arm hole (111) on the panel (11), and on frame (1), offer the second indicating arm hole (12), first, the second indicating arm hole (111,12) overlap each other, it is characterized in that described circuit breaker position indicating device comprises a supporting base (3), one limiting plate (4), one guide post (5) and an indicating arm (6), supporting base (3) is fixed on the described frame (1), limiting plate (4) is fixed on described circuit breaker (2) and upward and with supporting base (3) keeps corresponding, one end of guide post (5) is located on the supporting base (3), the other end is located on the limiting plate (4), indicating arm (6) is hinged on supporting base (3) and an end also connects with guide post (5), the other end of indicating arm (6) is corresponding to described first, the second indicating arm hole (111,12) in, and lean out the first indicating arm hole (111), described guide post is installed with first on (5), second locating part (51,52), first locating part (51) is corresponding to a side of described limiting plate (4), and second locating part (52) is corresponding to the opposite side of limiting plate (4), and also be equipped with a stored energy mechanism (53) on guide post (5), the position of this stored energy mechanism (53) on guide post (5) is positioned at described supporting base (3).

2. the circuit breaker position indicating device of mesohigh circuit breaker propulsive mechanism according to claim 1, it is characterized in that having on the described panel (11) first and observe the district (112) and the second observation district (113), first, second observes a side or two ends that district (112,113) is positioned at the described first indicating arm hole (111), wherein, first observe the top that district (112) is positioned at the second observation district (113).

3. the circuit breaker position indicating device of mesohigh circuit breaker propulsive mechanism according to claim 2, it is characterized in that described first observes to have in the district (112) and be used to disclose the Word message that circuit breaker is in the service position, and described second observe to have in the district (113) and be used to disclose the Word message that circuit breaker is in test position.

4. the circuit breaker position indicating device of mesohigh circuit breaker propulsive mechanism according to claim 1, it is characterized in that described supporting base (3) is corresponding to the described second indicating arm hole (12), and supporting base (3) has a support plate (31) that is used for for described stored energy mechanism (53) supporting towards a side of described limiting plate (4), describedly be installed with first, second locating part (51,52) guide post (5) passes this support plate (31), on the supporting base (3), the lower end respectively is formed with a kink (32), and each kink (32) is fixing with described frame (1).

5. the circuit breaker position indicating device of mesohigh circuit breaker propulsive mechanism according to claim 1, the bottom that it is characterized in that described supporting base (3) has pair of pin axle bed (33), described indicating arm (6) is hinged on axis pin base (33) by bearing pin (61), and indicating arm (6) connects by connecting pin (62) and described guide post (5).

6. the circuit breaker position indicating device of mesohigh circuit breaker propulsive mechanism according to claim 4, it is characterized in that described stored energy mechanism (53) comprises first, second spring (531,532) and spring base (533), first, second spring (531,532) all be nested with on described guide post (5), spring base (533) is installed on the guide post (5) and is positioned at first, second spring (531,532) between, one end bearing of described first spring (531) is on described supporting base (3), the other end is bearing in a side of spring base (533), one end bearing of described second spring (532) is at the opposite side of spring base (533), and the other end is bearing on the described support plate (31).

7. according to the circuit breaker position indicating device of claim 1 or 4 described mesohigh circuit breaker propulsive mechanisms, it is characterized in that described first, second locating part (51,52) is position-arresting disk or spacer pin.

8. the circuit breaker position indicating device of mesohigh circuit breaker propulsive mechanism according to claim 6 is characterized in that described spring base (533) is backing pin or block plate.