CN107464720B - Static contact component and the disconnecting switch for using the component - Google Patents

Abstract

The invention relates to a static contact assembly and an isolating switch using the assembly. The static contact assembly includes a static contact and a static contact seat for installing the static contact. The path is provided with a spring device for providing buffer force to the moving end assembly when the moving end assembly and the static contact are closed, and to provide opening force to the moving end assembly when the brake is opened. In the process of braking, it provides a push force to the moving contact, so as to weaken or counteract the closing impact between the moving contact and the static contact; at the same time, when the moving contact and the static contact are opened, the spring device Provide the moving end assembly with the opening force separated from the static contact, so that when the opening signal is given and the output force of the operating mechanism is insufficient, the moving contact and the static contact can be separated by the opening force of the spring device. The head is separated to solve the problem that the output torque of the operating mechanism is not enough to overcome the clamping force between the dynamic and static contacts at the initial stage of opening.

Description

Static contact assembly and isolating switch using the assembly

technical field

The invention relates to the field of high-voltage power transmission and transformation equipment, in particular to a static contact assembly and an isolating switch using the assembly.

Background technique

At present, the operating mechanism of the commonly used isolating switch is mainly operated by manual, electric, pneumatic or hydraulic transmission. The operating mechanism is connected to the rotating shaft through the linkage mechanism, so that the rotating shaft rotates, and then drives the moving end assembly of the isolating switch. The opening and closing action occurs between the static contact assembly. Among the pneumatic isolating switches, some are used in the synthesis circuit of large-capacity and high-current experimental stations, connecting and converting equipment and test lines in the hall of the synthesis circuit, which drive the moving end components of the isolating switch through the pneumatic operating mechanism. The moving end assembly of the isolating switch includes a moving contact and a conductive rod electrically connected to the moving contact, and the static contact assembly includes a static contact and a static contact seat for installing the static contact.

The general pneumatic isolating switch mainly has vertical opening type and horizontal opening type, that is, the conductive rod and the static contact are distributed vertically or horizontally, and the cylinder operating mechanism is generally used to drive the conductive rod. During the closing action between the heads, the cylinder drives the conductive rod to swing on the horizontal plane, and then the moving contact and the static contact at the end of the conductive rod close. At this time, due to the large swing force of the conductive rod, the closing The impact force of the moving contact on the static contact is relatively large during the brake, which will cause certain damage to the use of the disconnector; and in the process of opening the brake between the moving contact and the static contact, due to the characteristics of the cylinder movement, The output force of the cylinder cannot quickly reach the required operating force, and it needs a certain period of time to gradually increase, which will cause a certain pause process in the conductive rod at the beginning of the opening signal. After the pause, when the output force of the cylinder reaches the rated value , the conductive rod will move suddenly, which will cause the entire opening process to be unstable, resulting in the problem of poor reliability of the opening process.

Contents of the invention

The purpose of the present invention is to provide a static contact assembly to solve the problem in the prior art that the opening and closing process between the moving contact and the static contact is not stable; Disconnect switch for contact assemblies.

In order to achieve the above purpose, the first technical solution of the static contact assembly of the present invention is:

The static contact assembly includes a static contact and a static contact seat for installation of the static contact. The static contact seat or the static contact is located on the moving path of the moving end assembly. Provide buffer force to the moving end assembly when braking, and provide opening force spring device to the moving end assembly when opening the brake.

The second technical solution of the static contact assembly of the present invention is: on the basis of the first technical solution of the static contact assembly of the present invention, the spring device includes a contact for push-fitting with the moving contact of the moving end assembly The pushing part, and/or includes a conductive rod pushing part for pushing and fitting with the conductive rod of the moving end assembly.

The third technical solution of the static contact assembly of the present invention is: on the basis of the second technical solution of the static contact assembly of the present invention, the contact pushing part includes a push rod that is press-fitted with the moving contact and is used for A spring that applies force to the push rod to move in the direction of the moving end assembly.

The fourth technical solution of the static contact assembly of the present invention is: on the basis of the third technical solution of the static contact assembly of the present invention, the contact pushing part further includes a spring installation tube arranged on the static contact seat, so The guide of the push rod is set in the spring installation cylinder, and the mating end of the push rod used to push and cooperate with the movable end assembly protrudes outside the spring installation cylinder, and the spring is pressed between the spring installation cylinder and the push rod. A limiting structure for limiting the pushing length of the push rod is arranged on the spring mounting cylinder.

The fifth technical solution of the static contact assembly of the present invention is: on the basis of the fourth technical solution of the static contact assembly of the present invention, the peripheral surface of the push rod is provided with a guide for slidingly mating with the inner wall of the spring installation cylinder. the flange, and the position-limiting structure includes a retaining ring arranged on one end of the spring mounting cylinder and used to stop and cooperate with the flange.

The sixth technical solution of the static contact assembly of the present invention is: on the basis of the fourth technical solution of the static contact assembly of the present invention, the static contact seat includes a mounting seat, and the mounting seat is provided with a spring mounting cylinder to pass through. The installation hole of the installation seat is provided with a screw hole along the radial direction of the installation hole for the fastening screw to penetrate to fix the spring installation cylinder. The axial position of the spring installation cylinder in the installation hole can be adjusted. adjust.

The seventh technical solution of the static contact assembly of the present invention is: on the basis of the second, third, fourth, fifth or sixth technical solutions of the static contact assembly of the present invention, the pushing part of the conductive rod includes a It is used for the swing rod that pushes and cooperates with the conductive rod and the torsion spring for applying the force to the swing rod to swing toward the moving end assembly.

The eighth technical solution of the static contact assembly of the present invention is: on the basis of the seventh technical solution of the static contact assembly of the present invention, the static contact seat includes a mounting plate, and the pushing part of the conductive rod includes a On the fixed seat, a rotating shaft is arranged on the fixed seat, and one end of the swing rod is fixed on the peripheral surface of the rotating shaft to realize the swing when the rotating shaft rotates synchronously. The torsion spring is arranged between the fixed seat and the rotating shaft between.

The ninth technical solution of the static contact assembly of the present invention is: on the basis of the eighth technical solution of the static contact assembly of the present invention, a mounting plate is provided on the mounting plate for installation of the fixing seat and is perpendicular to the swing plane of the swing rod. The adjustment long hole extends in the direction, and the position of the fixing seat relative to the mounting plate can be adjusted.

The first technical scheme of the isolating switch of the present invention is:

A disconnector, including a static contact assembly and a moving end assembly driven by an operating mechanism to reciprocate. The static contact assembly includes a static contact and a static contact seat for the static contact. The static contact seat or The moving path of the movable end assembly on the head is provided with a spring device for providing a buffer force to the movable end assembly when the movable end assembly and the static contact are closed, and to provide an opening force to the movable end assembly when the brake is opened.

The second technical solution of the isolating switch of the present invention is: on the basis of the first technical solution of the isolating switch of the present invention, the spring device includes a contact pushing mechanism for pushing and cooperating with the moving contact of the moving end assembly. part, and/or include a conductive rod pushing part used to push and cooperate with the conductive rod of the moving end assembly.

The third technical solution of the isolating switch of the present invention is: on the basis of the second technical solution of the isolating switch of the present invention, the contact pushing part includes a push rod that is press-fitted with the moving contact and is used for pushing A spring that applies force to the rod to move in the direction of the moving end assembly.

The fourth technical solution of the isolating switch of the present invention is: on the basis of the third technical solution of the isolating switch of the present invention, the contact pushing part further includes a spring installation cylinder arranged on the static contact seat, the pushing The rod guide is set in the spring installation cylinder, and the mating end on the push rod used to push and cooperate with the movable end assembly protrudes outside the spring installation cylinder, and the spring push pressure is arranged between the spring installation cylinder and the push rod. A limiting structure for limiting the pushing length of the push rod is arranged on the spring mounting cylinder.

The fifth technical solution of the isolating switch of the present invention is: on the basis of the fourth technical solution of the isolating switch of the present invention, the peripheral surface of the push rod is provided with a protrusion for guiding sliding cooperation with the inner wall of the spring installation cylinder. The limit structure includes a retaining ring arranged on one end of the spring installation cylinder and used to stop and cooperate with the flange.

The sixth technical solution of the isolating switch of the present invention is: on the basis of the fourth technical solution of the isolating switch of the present invention, the static contact seat includes a mounting seat, and the mounting seat is provided with a spring mounting tube for wearing. The mounting hole is provided with a screw hole along the radial direction of the mounting hole on the mounting base for the penetration of the tightening screw to fix the spring mounting cylinder, and the axial position of the spring mounting cylinder in the mounting hole can be adjusted.

The seventh technical solution of the isolating switch of the present invention is: on the basis of the second, third, fourth, fifth or sixth technical solution of the isolating switch of the present invention, the push part of the conductive rod includes a A swing rod that pushes and fits the conductive rod, and a torsion spring for applying force to the swing rod to swing toward the moving end assembly.

The eighth technical solution of the isolating switch of the present invention is: on the basis of the seventh technical solution of the isolating switch of the present invention, the static contact seat includes a mounting plate, and the pushing part of the conductive rod includes a A rotating shaft is arranged on the fixed seat, and one end of the swing rod is fixed on the peripheral surface of the rotating shaft to realize swinging when the rotating shaft rotates synchronously. The torsion spring is arranged between the fixed seat and the rotating shaft.

The ninth technical solution of the isolating switch of the present invention is: on the basis of the eighth technical solution of the isolating switch of the present invention, the mounting plate is provided with a fixed seat for installation and extends along the direction perpendicular to the swing plane of the swing rod. The adjustment long hole, the position of the fixing seat relative to the mounting plate can be adjusted.

The beneficial effect of the present invention is: compared with the prior art, the static contact assembly involved in the present invention is provided with a spring device on the moving path of the moving end assembly on the static contact or the static contact seat, through which the spring device During the closing process of the contact and the moving contact, it provides a push force to the moving contact, so as to weaken or offset the closing impact between the moving contact and the static contact, and has a certain protective effect on the switch; at the same time, When the moving contact is separated from the static contact, the spring device provides the moving end assembly with a breaking force that is separated from the static contact, so that when the opening signal is given, the output force of the operating mechanism is not enough. The moving contact is separated from the static contact by the opening force of the spring device, which solves the problem that the output torque of the operating mechanism is not enough to overcome the clamping force between the moving and static contacts at the initial stage of opening, and realizes the connection between the conductive rod and the static contact. The smooth transition during the opening of the switch further ensures the reliability of the opening process.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the static contact assembly of the present invention;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is the left view of Fig. 1;

Fig. 4 is a schematic structural view of the contact slider in Fig. 1;

Figure 5 is a top view of Figure 4;

Fig. 6 is a schematic structural diagram of the static contact in Fig. 1;

Fig. 7 is a schematic structural view of the contact finger in Fig. 6;

Figure 8 is a top view of Figure 7;

Fig. 9 is a schematic structural diagram of the contact pushing part in Fig. 1;

Fig. 10 is a structural schematic diagram of the push part of the conductive rod in Fig. 1;

FIG. 11 is a cross-sectional view of FIG. 10 .

Detailed ways

Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

An embodiment of the static contact 4 assembly of the present invention, as shown in Figures 1 to 11, the static contact 4 assembly is used in a pneumatic isolating switch, which includes a static contact seat and a static contact set on the static contact seat Head 4, where the orientation of the static contact 4 is horizontal, and the conductive rod in the corresponding isolating switch is driven by the cylinder operating mechanism to swing back and forth on a horizontal plane that is flush with the orientation of the static contact 4, and during the swing process There is a closing position that cooperates with the static contact 4 and an opening position that is separated from the static contact 4.

The static contact seat includes a terminal board 7 extending laterally along the horizontal plane, the right end of the terminal board 7 is fixed with a terminal board welding frame 9, and the left end is installed with two vertically extending terminals located on the upper surface of the terminal board 7. Guide rod 5, guide rod 5 realizes fixing by being installed in the installation hole on the wiring board 7. The upper end of the guide rod 5 extends laterally to the left and is fixed with a mounting plate 14, which is L-shaped, and the left end of the mounting plate 14 is folded downwards with a hem.

When the conductive rod swings on the horizontal plane, the conductive rod will undergo deflection and deformation under the influence of its own weight and the fitting gap between the parts, causing the moving contact on the conductive rod to sag. Due to the uncertainty of the fitting gap between the parts , so that the actual value of the sagging of the conductive rod has a slight deviation from the theoretical value. In order to ensure reliable opening and closing, the static contact 4 is installed in the guide hole 62 of the contact slider 6 in the moving path of the conductive rod. Two guide rods 5, so that the position of the static contact 4 in the up and down direction can be adjusted. The above-mentioned contact slider 6 is provided with a nail hole 61 for screwing on the guide rod 5 along the radial direction of the guide rod 5. According to the actual moving path of the movable contact on the conductive rod, the static contact is adjusted. The upper and lower positions of the head 4, after the position is determined, the screws on both sides of the contact slider 6 are tightened, so as to eliminate the influence of the sagging of the conductive rod and realize normal opening and closing between the conductive rod and the static contact 4.

The contact slider 6 is connected with a conductive strip 8, and the other end of the conductive strip 8 is fixed on the wiring board 7, so that the current can pass through the static contact 4, the contact slider 6, the conductive strip 8, the wiring board 7, The wiring board welding frame 9 is connected to the bus bar to form a conductive circuit.

The static contact 4 includes a conductive block 41 and contact fingers 42 fixed on opposite ends of the conductive block 41. The two contact fingers 42 extend in the same direction along one side of the conductive block 41 to form a U-shaped opening structure together with the conductive block 41. The inner side of the contact finger 42 is provided with a chute 421 for inserting the moving contact of the conductive rod. A tension spring 43 that exerts a force of relative movement by two contact fingers, so as to ensure that when the moving contact and the static contact 4 are closed, the effect of the tension spring 43 can ensure that the moving contact is clamped between the two sides of the static contact 4. between fingers.

In order to avoid the impact force of closing between the moving contact and the static contact and to solve the problem that the output torque of the operating mechanism is not enough to overcome the clamping force between the moving and static contacts at the initial stage of opening, a spring device is installed on the static contact seat , used to provide cushioning force to the moving end assembly when the moving contact and the static contact are closing, and to provide thrust when opening. Wherein the spring device includes a contact pushing part for pushing and cooperating with the movable contact and a conductive rod pushing part for pushing and cooperating with the conductive rod.

The static contact 4 is fixed on the left side of the contact slider 6, and a fixed plate 3 is also fixed on the left side of the conductive block of the static contact 4. The left plate surface of the fixed plate 3 is provided with a moving path located at the movable contact. The above-mentioned contact pushing part 2, due to the characteristics of the cylinder movement, the output force of the cylinder cannot quickly reach the required operating force, and it takes a certain period of time to gradually increase, which leads to the existence of the conductive rod of the product at the initial stage of the opening signal. Pause problem. After the pause, the conductive rod moves suddenly, and the whole opening process is not stable. Therefore, the function of the contact pusher part 2 is to eliminate this pause phenomenon and ensure the smooth operation of opening and closing. Two mounting seats 1 arranged at intervals along the horizontal direction on the left plate surface of the fixed plate 3 are provided with mounting holes on the two mounting seats 1, and the two mounting holes are coaxial, and the contact pushing part 2 is included in the The spring installation cylinder 21 that is worn integrally in the two installation holes is provided with a fixing hole for the screw to be worn and pressed on the peripheral surface of the spring installation cylinder 21 on the installation seat 1, and the spring installation cylinder 21 is mounted on the installation seat 1 The front and rear positions can be adjusted. A push rod 22 is guided and worn in the spring installation cylinder 21, and one end of the push rod 22 protrudes from the spring installation cylinder 21, and it can move back and forth in the direction facing the moving contact. A spring 23 for applying forward force to the push rod is arranged between 21, so that the push rod 22 can be pushed forward before the movable contact is in the closing position. Put it into the spring installation tube 21, and then close with the static contact 4. The peripheral surface of the push rod 22 is provided with a flange 24 for guiding and sliding cooperation with the cylinder wall of the spring installation cylinder, and a blocking cap 25 for blocking and matching with the flange is buckled on the periphery of the spring installation cylinder 21. Central position on 25 offers the perforation that passes for push rod, can guarantee thus that push rod does not deviate from in the spring installation tube.

During the closing process of the moving contact and the static contact 4, because the push rod first pushes and cooperates with the moving contact, the moving contact will not enter the static contact 4 too deep during the closing process, and the moving contact The head is closed under the combined action of the output force of the cylinder and the push rod; when the brake is opened, if the driving force of the cylinder is not enough, the pushing of the push rod to the moving contact can overcome the tightening of the static contact 4 to the moving contact force to push the conductive rod away from the static contact 4, so as to realize the stability of the opening process. In this embodiment, the push rod is made of polytetrafluoroethylene, which is installed on the side of the static contact 4, and is used to press fit with the moving contact, thereby also controlling the joint between the moving contact and the static contact. The impact force of the brake plays a certain buffering role.

However, due to the uncertainty of the clamping force during the opening process between the static contact 4 and the moving contact, the accuracy of the clamping force against the spring of the contact pushing part 2 alone is not enough, and it is impossible to accurately find the push rod. The demarcation point of the thrust of the movable contact, so the static contact 4 assembly also includes a conductive rod pushing part located in the moving path of the conductive rod, and the conductive rod pushing part includes the above-mentioned L-shaped mounting plate 14. The fixing seat 13 on the vertical wall is provided with an adjusting long hole extending in the front-rear direction on the vertical wall, and is used for installing the fixing seat 13, thereby realizing that the position of the fixing seat in the front-rear direction is adjustable. The fixed seat 13 is provided with a rotating shaft 10 extending in the left and right directions of the axis, and the rotating shaft 10 is fixed with a swing rod 11 extending along the axis direction perpendicular to the fixed shaft and on the moving path of the conductive rod. 13 is provided with a torsion spring 12 for applying a force to the swing rod 11 to swing in the direction of the conductive rod, and on the fixed seat 13 there is also a limit rod that cooperates with the swing rod 11 in its swing direction. 15. The limit rod can limit the swing limit of the swing rod 11 to prevent the swing from exceeding the moving path of the conductive rod.

When the static contact 4 assembly is in use, the vertical position of the static contact 4 can be adjusted through the vertically adjustable contact slider 6, thereby eliminating the influence caused by the sagging of the conductive rod and ensuring that the conductive rod and the static contact 4 between the stable opening and closing. During the closing process, the setting of the contact pushing part 2 and the conductive rod pushing part can buffer the impact force of the conductive rod on the static contact 4, so as to realize smooth closing; during the opening process, when the output force of the cylinder is not enough , the conductive rod is separated from the static contact 4 through the pushing of the push rod and the swing rod 11 to the conductive rod. In this process, the thrust of the push rod and the thrust of the swing rod 11 cooperate with each other to further determine the thrust when opening The critical point, so as to achieve the purpose of smooth opening and closing.

In other embodiments, only the contact pusher or the conductive rod pusher can be provided to buffer the opening and closing process of the conductive rod;

In other embodiments, the contact pushing part can be directly fixed on the static contact seat; the spring mounting seat can be two guide posts arranged side by side at intervals, and a spring is arranged between the two guide posts, and the two guide posts The one-piece body is equipped with a pressure plate that fits with the spring, and the pressure plate is replaced by a push rod that cooperates with the conductive rod; the push mode of the contact push part and the conductive rod push part can be reversed; the static contact The orientation of the push rod and the push rod can be adjusted according to the actual opening and closing direction between the conductive rod and the static contact.

In other embodiments, the spring buffer device is also tried to be used in other forms of opening and closing isolating switches, such as moving and static contacts arranged at intervals up and down, and the moving contacts are in the form of swinging, or between the moving contacts and the static contacts. Through the in-line opening and closing form, a spring buffer device can be set on the opening and closing path.

The isolating switch involved in the present invention includes a conductive rod and a static contact assembly. The structure of the static contact assembly is consistent with the structure of the above-mentioned static contact assembly, and will not be expanded in detail.

Claims (8)

1. The static contact assembly, including the static contact and the static contact seat for the installation of the static contact, is characterized in that: the static contact seat or the static contact is located on the moving path of the moving end assembly. A spring device that provides a buffer force to the moving end assembly when the assembly is closed with the static contact, and a spring device that provides an opening force to the moving end assembly when the brake is opened. The contact pushing part, the contact pushing part includes a push rod press-fitted with the moving contact and a spring for exerting force on the pushing rod to move toward the moving end assembly, the contact pushing part It also includes a spring installation cylinder arranged on the static contact seat, the push rod guide is arranged in the spring installation cylinder, and the mating end of the push rod used for push-fitting with the moving end assembly protrudes outside the spring installation cylinder. The spring pressure is arranged between the spring installation cylinder and the push rod, and the spring installation cylinder is provided with a limit structure for limiting the push length of the push rod; the spring device also includes a conductive rod for connecting with the moving end assembly The push-fit conductive rod push part, the conductive rod push part includes a swing rod for push-fitting with the conductive rod and a torsion spring for applying a force to the swing rod to swing in the direction of the moving end assembly; The static contact seat includes a mounting plate, and the pushing part of the conductive rod includes a fixed seat fixed on the mounting plate. Swing is realized when the rotating shaft rotates synchronously, and the torsion spring is arranged between the fixed seat and the rotating shaft. 2. The static contact assembly according to claim 1, characterized in that: the peripheral surface of the push rod is provided with a flange for guiding and sliding cooperation with the inner wall of the spring installation cylinder, and the limiting structure includes a set A retaining ring on one end of the spring barrel for engagement with a flange stop. 3. The static contact assembly according to claim 1, characterized in that: the static contact seat includes a mounting seat, and the mounting seat is provided with a mounting hole for the spring mounting cylinder to pass through, and the upper edge of the mounting seat The radial direction of the installation hole is provided with a screw hole for the penetration of the tightening screw to fix the spring installation cylinder, and the axial position of the spring installation cylinder in the installation hole can be adjusted. 4. The static contact assembly according to claim 1, characterized in that: the mounting plate is provided with an adjustment long hole extending in a direction perpendicular to the swing plane of the swing rod for mounting the fixing seat, and the fixing seat The position relative to the mounting plate is adjustable. 5. A disconnector, comprising a static contact assembly and a moving end assembly driven by the operating mechanism to reciprocate, the static contact assembly includes a static contact and a static contact seat for installation of the static contact, characterized in that: The static contact seat or the static contact is located on the moving path of the moving end assembly, and is used to provide a buffer force to the moving end assembly when the moving end assembly and the static contact are closed, and to provide an opening force to the moving end assembly when the brake is opened. A spring device, the spring device includes a contact pushing part for pushing and matching with the moving contact of the moving end assembly, and the contact pushing part includes a push rod for pressing and fitting with the moving contact and a push rod for pushing against the moving contact The push rod exerts a spring that moves toward the direction of the moving end assembly. The contact pushing part also includes a spring installation cylinder arranged on the static contact seat. The push rod is guided in the spring installation cylinder. The mating end for push-fitting with the movable end assembly protrudes outside the spring installation cylinder, the spring pressure is arranged between the spring installation cylinder and the push rod, and the spring installation cylinder is provided with a top for restricting the push rod The limit structure of the push length; the spring device also includes a conductive rod pushing part for pushing and matching with the conductive rod of the moving end assembly, and the conductive rod pushing part includes a pendulum for pushing and fitting with the conductive rod rod and a torsion spring for exerting force on the swing rod to swing toward the direction of the moving end assembly; the static contact seat includes a mounting plate, and the pushing part of the conductive rod includes a fixed seat fixed on the mounting plate, and the fixed seat The upper rotation is provided with a rotating shaft, and one end of the swing rod is fixed on the peripheral surface of the rotating shaft to realize swinging when the rotating shaft rotates synchronously, and the torsion spring is arranged between the fixed seat and the rotating shaft. 6. The isolating switch according to claim 5, characterized in that: the peripheral surface of the push rod is provided with a flange for guiding and sliding cooperation with the inner wall of the spring installation cylinder, and the limit structure includes a flange arranged on the spring installation cylinder. A retaining ring on one end of the barrel for engagement with a flange stop. 7. The isolating switch according to claim 5, characterized in that: the static contact seat includes a mounting seat, and the mounting seat is provided with a mounting hole for the spring mounting cylinder to pass through, and the mounting seat is arranged along the mounting hole. A screw hole is provided in the radial direction for the fastening screw to fix the spring installation cylinder, and the axial position of the spring installation cylinder in the installation hole can be adjusted. 8. The isolating switch according to claim 5, characterized in that: the mounting plate is provided with a long adjustment hole extending in a direction perpendicular to the swing plane of the swing rod for the fixing seat to be installed on, and the fixing seat is relatively The position of the mounting plate is adjustable.