阅读说明：本技术 一种弹簧操动机构用防漏合掣子 (Spring operating mechanism is with leak protection pawl that closes ) 是由 马越星 刘晓维 于 2020-05-25 设计创作，主要内容包括：本发明属于高压输变电技术领域,是一种弹簧操动机构用防漏合掣子,其设置在弹簧操动机构的壁板上,在壁板上安装有分闸电磁铁；扭簧套装在半轴上,半轴两端套装有轴承,所述轴承安装在壁板和固定座之间；轴承嵌入旋转掣子中,从动轴承经轴销装入旋转掣子上,用轴销将顶杆的一端装入旋转掣子上,并用挡圈锁定。该弹簧操动机构用防漏合掣子具有防漏合功能,原理上彻底解决了合后即分问题,分闸掣子系统无需始动时间。防漏合掣子无需合位锁定过程和时间,即合闸锁定不占用合分时间段。由于防漏合掣子系统各级是铰链式连接,承压载荷是轴销的柱面,所以防漏合掣子可承受更大的载荷,非常适合大功率弹簧机构的需用。(The invention belongs to the technical field of high-voltage power transmission and transformation, and relates to an anti-closing pawl for a spring operating mechanism, which is arranged on a wall plate of the spring operating mechanism, wherein a separating brake electromagnet is arranged on the wall plate; the torsion spring is sleeved on the half shaft, bearings are sleeved at two ends of the half shaft, and the bearings are arranged between the wall plate and the fixed seat; the bearing is embedded in the rotary latch, the driven bearing is installed on the rotary latch through a shaft pin, one end of the ejector rod is installed on the rotary latch through the shaft pin, and the ejector rod is locked through a check ring. The spring operating mechanism has the function of preventing the closing of the closing-preventing pawl, the problem that the closing is carried out immediately is solved fundamentally, and the opening pawl system does not need starting time. The anti-closing pawl does not need to be in a closing position locking process and time, namely, closing locking does not occupy a closing and opening time period. Because each level of the anti-closing catch system is in hinge connection, and the bearing load is the cylindrical surface of the shaft pin, the anti-closing catch can bear larger load and is very suitable for the requirement of a high-power spring mechanism.)

1. An anti-closing pawl for a spring operating mechanism is characterized in that the anti-closing pawl for the spring operating mechanism is provided with a wall plate, and a switching-off electromagnet is arranged on the wall plate;

the torsion spring is sleeved on the half shaft, bearings are sleeved at two ends of the half shaft, and the bearings are arranged between the wall plate and the fixed seat;

the bearing is embedded in the rotary latch, the driven bearing is installed on the rotary latch through a shaft pin, one end of the ejector rod is installed on the rotary latch through the shaft pin, and the ejector rod is locked through a check ring.

2. The anti-lost latch for a spring operated mechanism of claim 1, wherein said bearing is received within a stepped shaft, said bearing being mounted between the wall plate and the anchor block.

3. The anti-lost latch for a spring operated mechanism of claim 1, wherein the bearing is embedded in the crank wall and the shaft mounts the crank arm in the anchor block.

4. The anti-lost latch for a spring operated mechanism of claim 1, wherein said anchor block and said wall plate have alignment pins mounted thereon.

5. The anti-lost latch for a spring operated mechanism of claim 3, wherein the crank arm is mounted to the wall via the output shaft and the roller is journaled to the output crank arm.

6. The anti-lost latch for a spring operated mechanism of claim 5, wherein the wall plate has a cam mounted thereon by a cam shaft, and the crank arm has an oilless bearing mounted therein, the oilless bearing being mounted on the wall plate by a threaded shaft, the oilless shaft being locked in place by a shaft retainer.

7. The anti-lost pawl for a spring operated mechanism of claim 1, wherein said torsion spring is sleeved on a torsion spring shaft, said torsion spring shaft is mounted in a fixed seat, one end of said torsion spring is hung on a screw, and the other end of said torsion spring is hung on a crank arm.

8. The anti-lost latch for a spring operated mechanism of claim 1, wherein the shaft pin is used for penetrating and hinging the top rod, the folding rod and is locked and arranged by a shaft retaining ring.

9. The anti-lost latch for a spring operated mechanism of claim 8, wherein said folding bar is pivotally connected at one end to said output crank arm by a pivot pin and is locked in place by a shaft retainer ring; the other end of the folding rod is connected with the crank arm and the connecting plate in a penetrating and hinged mode.

10. The anti-lost latch for a spring operated mechanism of claim 9, wherein the other end of the link plate is pivotally connected to the crank arm and the driven bearing by a shaft pin and is locked in place by a shaft retaining ring.

Technical Field

The invention belongs to the technical field of high-voltage power transmission and transformation, and particularly relates to an anti-closing pawl for a spring operating mechanism.

Background

The spring operating mechanism is an important device in the field of high-voltage power transmission and transformation, and is an important component of a high-voltage circuit breaker, and the switching-on and switching-off operation of the high-voltage circuit breaker is realized through the operating mechanism. The spring operating mechanism has the characteristics of low cost, simple structure, visual principle, less maintenance and the like, and is suitable for being used on high-voltage circuit breakers in large quantities.

At present, spring operating mechanisms applied to high-voltage circuit breakers generally have the hidden trouble that the switching-on position cannot be locked, namely, the switching-off position is also called as the leakage switching-on phenomenon, particularly, because the number of stages of lock catches of a high-power spring mechanism is multiple, all stages of lock catches move in succession in the same very short time at the same moment, the locking and locking are very difficult in principle, and the problem that the safe and reliable operation of the spring mechanism is seriously influenced in trouble cannot be well solved.

Along with the development of the national power system, the system capacity is continuously increased, the transmission voltage is continuously increased, the progress of the circuit breaker technology urgently needs a high-power spring operating mechanism, and the national power grid operation further needs a novel spring operating mechanism which is reliable in opening and closing locking, stable in mechanical characteristics and high in output power. Since the history of the spring mechanism, the missing closing (opening after closing) is always the fatal chronic disease of the mechanism, and the closing lock catch can only be completed by forced rapid action of the opening pawl. The circuit breaker is in a leakage state when the speed is slow, so that the operation of the circuit breaker is greatly dangerous (non-full-phase switching-on).

Through the above analysis, the problems and defects of the prior art are as follows: in the operation process of the spring mechanism, the spring mechanism is slightly lost and is leaked, so that great danger is easily brought to the operation of the circuit breaker.

The difficulty in solving the above problems and defects is: the missing defect is not completely solved at home and abroad up to now and still is a technical blank of a spring mechanism. Especially for a 550kV circuit breaker, the problem of missing closing is not thoroughly solved, and the spring operating mechanism cannot be safely used on the product.

The significance of solving the problems and the defects is as follows: the spring operating mechanism can be reliably applied to the ultrahigh voltage circuit breaker, and the problems that the circuit breaker closing and opening time is not enough due to the leakage closing, the return air of a pressure cylinder is insufficient, and the explosion is caused by the failure of opening and closing due to the failure of arc extinction after the leakage closing and opening are avoided are solved. And secondly, if the switch is not closed again, the power grid is subjected to overvoltage when the switch is closed every time, and the power grid equipment is threatened by the overvoltage when the switch is closed for more times. And thirdly, the leakage causes the power grid not to transmit power, thereby causing a great amount of loss of power consumers.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides an anti-closing latch for a spring operating mechanism.

The invention is realized in such a way that the spring operating mechanism uses the anti-closing pawl, which is provided with a wall plate, and the wall plate is provided with a brake-separating electromagnet;

the torsion spring is sleeved on the half shaft, bearings are sleeved at two ends of the half shaft, and the bearings are arranged between the wall plate and the fixed seat;

the bearing is embedded in the rotary latch, the driven bearing is installed on the rotary latch through a shaft pin, one end of the ejector rod is installed on the rotary latch through the shaft pin, and the ejector rod is locked through a check ring.

Further, a stepped shaft is embedded in the bearing, and the bearing is installed between the wall plate and the fixed seat.

Further, the bearing is embedded into the crank wall, and the shaft is used for installing the crank arm into the fixed seat.

Furthermore, the fixing seat and the wall plate are provided with positioning pins.

Furthermore, the crank arm is mounted on the wall plate through an output shaft, and the roller is mounted on the output crank arm through a shaft.

Further, install the cam through the camshaft on the wallboard, install the oilless bearing in the connecting lever, the oilless bearing passes through the spiral shell axle and installs on the wallboard, the oilless axle is through the setting of axle with retaining ring locking.

Further, the torsional spring suit is on the torsional spring axle, the torsional spring axle is installed in the fixing base, torsional spring one end is hung on the screw, the torsional spring other end is hung on the connecting lever.

Furthermore, the ejector rod, the folding rod and the folding rod are hinged through the shaft pin in a penetrating mode and are locked through the shaft check ring.

Furthermore, one end of the folding rod is hinged with the output crank arm through a shaft pin and is locked by a retaining ring for the shaft; the other end of the folding rod is connected with the crank arm and the connecting plate in a penetrating and hinged mode.

Furthermore, the other end of the connecting plate is hinged with the crank arm and the driven bearing through shaft pins in a penetrating manner and is locked by a retaining ring for the shaft.

By combining all the technical schemes, the invention has the advantages and positive effects that:

the anti-closing pawl device solves the problem of closing leakage in principle, the closing locking does not need any forced action, the closing locking is naturally completed, and the following functions and performances are also improved for the spring operating mechanism:

the first function and the anti-combination function thoroughly solve the problem of separating after combination in principle, and put an end to the hidden trouble of non-full-phase switching of the circuit breaker operated in a phase-splitting mode with a voltage level of over 252 kV. And particularly, the 550kV circuit breaker avoids serious damage to power equipment caused by voltage rise caused by non-full-phase switching-on.

And secondly, the opening catch system does not need the starting time, namely, in principle, the output shaft of the electromagnet motion finishing mechanism immediately moves to drive the breaker to open the brake, so that the brake opening time is shortened to the shortest.

And thirdly, the anti-closing pawl does not need the closing and locking process and time, namely, the closing and locking do not occupy the closing and opening time period, so that the closing and opening time of the mechanism can be shortened to the minimum.

Fourthly, because each stage of the anti-closing catch system is in hinge connection, and the bearing load is the cylindrical surface of the shaft pin, the anti-closing catch can bear larger load and is very suitable for the requirement of a high-power spring mechanism.

And fifthly, after the anti-closing pawl is adopted, the tail part of the transmission cam does not need to provide a special corner and energy consumption for locking the closing of the pawl, and the corner energy consumption can be used for closing power.

And sixthly, the anti-closing pawl can prevent the overshoot of the closing, and because the anti-closing pawl is hinged to the output connecting lever, the output connecting lever overshoots due to the limitation of the pawl positioning device after the pawl is completely closed because the pawl is provided with a closing positioning shaft, the overshoot of the output connecting lever cannot be overshot.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.

Fig. 1 is a schematic view of an arrangement of a latch mechanism for a spring-operated mechanism according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of the anti-lost latch for the spring operated mechanism provided by the embodiment of the present invention;

wherein, a and A-A are sectional views; b. B-B sectional view; c. C-C section view; d. D-D section view.

Fig. 3 is a schematic diagram of an initial position of a closing operation of the anti-lost latch for the spring operating mechanism according to the embodiment of the present invention.

Fig. 4 is a schematic diagram of the anti-engaging latch closing process for the spring operating mechanism according to the embodiment of the present invention.

Fig. 5 is a schematic illustration of a position of the anti-lost latch for the spring operating mechanism according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of the spring-operated mechanism of the present invention during the operation of preventing the closing of the latch and the opening of the gate.

Fig. 7 is a schematic view of the open/close position of the anti-lost latch for the spring operating mechanism according to the embodiment of the present invention.

Fig. 8 is a schematic view of the spring operated mechanism for returning the anti-lost latch to the armed position according to an embodiment of the present invention.

Fig. 9 is a perspective view of the primary components of the closing lock-catch mechanism of the present invention mounted in a spring actuator.

Fig. 10 is a schematic structural view of a rotary latch provided by an embodiment of the present invention.

Fig. 11 is a schematic structural diagram of a push rod according to an embodiment of the present invention.

Fig. 12 is a schematic structural diagram of a folding rod according to an embodiment of the present invention.

Fig. 13 is another schematic structural diagram of the folding bar provided by the embodiment of the invention.

Fig. 14 is a schematic structural diagram of a crank arm according to an embodiment of the present invention.

FIG. 15 is a schematic structural view of a half shaft provided in an embodiment of the present invention.

Fig. 16 is a schematic structural diagram of a fixing base according to an embodiment of the present invention.

In the figure: 1. a brake separating electromagnet; 2. a bolt; 3. locking the nut; 4. a push rod; 5. a half shaft; 6. a shaft pin; 7. a retainer ring for a shaft; 8. a limiting shaft; 9. a cam; 10. a camshaft; 11. a rotary catch; 12. a shaft pin; 13. a retainer ring for a shaft; 14. a top rod; 15. a shaft pin; 16. a retainer ring for a shaft; 17. an output crank arm; 18. folding the rod; 19. a shaft pin; 20. folding the rod; 21. an output shaft; 22. a shaft pin; 23. a driven bearing; 24. a crank arm; 25. positioning the shaft; 26. a shaft; 27. a fixed seat; 28. positioning pins; 29. a screw; 30. a gasket; 31. a torsion spring shaft; 32. a torsion spring; 33. wall plates; 34. a bearing; 35. a torsion spring; 36. a bearing; 37. a stepped shaft; 38. a bearing; 39. a driven bearing; 40. a crutch wall; 41. connecting plates; 42. a screw shaft; 43. a retainer ring for a shaft; 44 oilless bearings; 45. a shaft; 46. a drive roller.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

To solve the problems of the prior art, the present invention provides an anti-lost latch for a spring actuator, which is described in detail below with reference to the accompanying drawings.

A high-reliability locking-preventing latch device which is urgently needed by a high-power spring operating mechanism and is suitable for a sulfur hexafluoride circuit breaker is used for solving the problem that the high-power spring operating mechanism of the existing high-voltage-level circuit breaker is difficult to uniformly coordinate action due to multiple latch levels.

The technical scheme for realizing the purpose is as follows: an anti-closing detent device for a spring operating mechanism takes a wall plate 33 as a base body, an opening electromagnet 1 is arranged on the wall plate 33, a bolt 2 is sleeved with a locking nut 3 and then screwed on the opening electromagnet 1, and a push rod 4 is screwed on a half shaft 5, as shown in figure 2 c. The torsion spring 35 is sleeved on the half shaft 5, and after the bearings 36 are sleeved on the two ends of the half shaft, the half shaft and the bearing are installed between the wall plate 33 and the fixed seat 27. The bearing 38 is fitted into the rotary latch 11, the driven bearing 23 is fitted into the rotary latch 11 via the shaft pin 6, and locked by the shaft retainer 7, and one end of the carrier rod 14 is fitted into the rotary latch 11 via the shaft pin 12 and locked by the retainer 11. The stepped shafts 37 are inserted into the bearings 38 and then they are mounted between the wall plate 33 and the holder 27, see fig. 2 d. The bearing 34 is inserted into the crank arm 24 and the crank arm 24 is then inserted into the holder 27 by the shaft 26, see fig. 2 a. The fixing base 27 and the wall plate 33 are fitted with positioning pins 28, see fig. 2 b. The output crank arm 17 is attached to the wall plate 33 via the output shaft 21, and the roller 46 is attached to the output crank arm 17 by the shaft 45. The cam 9 is mounted on a wall plate 33 via a camshaft 10, an oilless bearing 44 is inserted into a crank arm 40, and the cam is mounted on the wall plate 33 by a screw shaft 42 and locked by a shaft retainer 43. The torsion spring 32 is sleeved on the torsion spring shaft 31 and then is arranged in the fixed seat 27, one end of the torsion spring 32 is hung on the screw 29, and the other end is hung on the crank arm 24. The top rod 14, the folding rod 18 and the folding rod 20 are hinged through a shaft pin 19 and locked by a shaft retaining ring 16. The other end of the folding rod 18 is hinged with an output crank arm 17 through a shaft pin 15 and locked by a shaft check ring 16, the other end of the folding rod 20 is hinged with a crank arm 24 and a connecting plate 41 through penetration, and the other end of the connecting plate 41 is hinged with a crank arm 40 and a driven bearing 30 through a shaft pin 22 and locked by a shaft check ring 13. To this end, the assembly of the anti-snap detent structure is complete.

The invention provides a working mode of a locking-preventing latch for a spring operating mechanism, which comprises the following steps:

in the closing process, as shown in fig. 2, the initial position of the closing action is shown, when the closing spring force F of the spring mechanism drives the cam 9 to rotate in the anticlockwise direction, the cam 9 drives the transmission roller 46 to drive the output connecting lever 17 to rotate clockwise, in the closing process, the folding rod 18, the folding rod 20 and the ejector rod 14 act in the direction shown in fig. 3, before the closing is about to be in place, the cam 9 drives the connecting lever 40 through the driven bearing 39 to drive the connecting plate 41 to push the connecting lever 24 to pass through a dead point, and the position of the connecting lever 24 just after the dead point is limited by the limiting shaft 25, so that the connecting lever 24, the folding rod 20, the folding rod 18, the ejector rod 14, the rotary pawl 11 and the half shaft 5 locking the rotary pawl support the output connecting lever 17 together at the closing position, as shown.

The brake opening process: when the opening electromagnet 1 is powered on, the electromagnet 1 triggers the push rod 4 to drive the half shaft 5 to rotate anticlockwise, so that the locking of the half shaft 5 to the rotary pawl 5 is unlocked, at the moment, the thrust from the opening spring to the output crank arm 17 causes the half shaft 5 to rotate anticlockwise, the folding rod 18, the folding rod 20, the top rod 14 and the rotary pawl 11 move in the direction shown in fig. 5, and the opening is in place as shown in fig. 6. After the brake is in place, when the closing spring stores energy again to make the cam 9 rotate to the preliminary closing position, the crank arm 24 rotates clockwise under the action of the torsion force of the torsion spring 32, so as to drive the folding rod 20, the folding rod 18, the top rod 14, the rotary latch 11, the connecting plate 41 and the crank arm 40 to move according to the direction shown in fig. 7, so that each part is reset to the preliminary closing position, and the half shaft 5 locks the rotary latch 11 again to wait for the next closing.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.