阅读说明：本技术 一种电网接地系统 (Power grid grounding system ) 是由 苏华锋 郭志军 刘建锋 邱育义 于 2020-05-26 设计创作，主要内容包括：本发明实施例公开了一种电网接地系统,包括支柱和固定连接于支柱侧壁上的开关盒,所述支柱的顶部固定连接有若干个绝缘子,若干个所述绝缘子的顶部共同安装有底板,所述底板上安装有刀闸组件；所述刀闸组件包括与底板固定连接的固定套筒和通过轴承竖直安装在固定套筒内底部的调节螺杆,所述调节螺杆的顶部螺纹连接有顶杆,所述顶杆的侧壁上对称固定连接有若干个导向凸起,所述固定套筒的内侧壁上对应导向凸起开设有若干个导向凹槽,本发明可直接将夹爪升高至与电网的接合处,只需要夹爪的中心对准接合处,且夹爪升高的高度上限大于接合处即可,所要求的的制造精度较低,使得制造成本也低,以及发生精度误差后的损失也较低。(The embodiment of the invention discloses a power grid grounding system, which comprises a support column and a switch box fixedly connected to the side wall of the support column, wherein the top of the support column is fixedly connected with a plurality of insulators, the tops of the insulators are jointly provided with a bottom plate, and a disconnecting link assembly is arranged on the bottom plate; the knife switch assembly comprises a fixing sleeve fixedly connected with a bottom plate and an adjusting screw rod vertically installed at the bottom in the fixing sleeve through a bearing, wherein the top of the adjusting screw rod is in threaded connection with a push rod, a plurality of guide bulges are symmetrically and fixedly connected to the side wall of the push rod, and a plurality of guide grooves are formed in the inner side wall of the fixing sleeve and correspond to the guide bulges.)

1. The power grid grounding system is characterized by comprising a support column (1) and a switch box (2) fixedly connected to the side wall of the support column (1), wherein the top of the support column (1) is fixedly connected with a plurality of insulators (3), the tops of the insulators (3) are jointly provided with a bottom plate (4), and a disconnecting link assembly (5) is arranged on the bottom plate (4);

the knife switch component (5) comprises a fixing sleeve (501) fixedly connected with a bottom plate and an adjusting screw rod (502) vertically installed at the bottom in the fixing sleeve (501) through a bearing, the top of the adjusting screw rod (502) is in threaded connection with a push rod (503), a plurality of guide bulges (504) are symmetrically and fixedly connected on the side wall of the push rod (503), a plurality of guide grooves (505) are formed in the inner side wall of the fixing sleeve (501) corresponding to the guide bulges (504), each guide bulge (504) is in sliding connection with the corresponding guide groove (505), a clamping jaw (506) is installed at the top of the push rod (503), the bottom of the adjusting screw rod (502) sequentially penetrates through the fixing sleeve (501), the bottom plate (4) and one of the insulators (3) and extends to the support column (1) to be connected with a transmission gear set (507), and the transmission gear set (507) is installed in the support column (1) through a rotating shaft, the transmission gear set (507) is connected with a rocker (508), and the rocker (508) is installed in the switch box (2).

2. The power grid grounding system of claim 1, wherein the clamping jaw (506) comprises a connecting plate (509) fixedly connected to the top of the top rod (503) and side plates (510) symmetrically and fixedly connected to two sides of the top edge of the connecting plate (503), the tops of the two side plates (510) are connected with pressing sheets (511) through torsion springs, and one sides of the two pressing sheets (511) far away from the side plates (510) are abutted.

3. The power grid grounding system as claimed in claim 2, wherein the pressing sheet (511) comprises a pressing plate portion (512) and a pressing strip portion (513) connected with the side plate (510), the pressing strip portion (513) comprises a plurality of pressing strips fixedly connected with the side wall of the pressing plate portion (512), the pressing strips on the two pressing strip portions (513) are staggered relatively and inserted, and the tops of the pressing plate portion (512) and the pressing strip portion (513) are jointly arranged in an arc shape.

4. A grid earthing system according to claim 3, characterized in that the length of the pressing sheet (511) is the same as the height of the side plate (510), and the length of the pressing strips on the pressing strip portion (513) is greater than half of the length of the pressing sheet (511).

5. The power grid grounding system of claim 1, wherein the guide protrusions (504) are located at the bottom edge of the side wall of the top bar (503), each guide protrusion (504) is provided with a guide hole (514), a slide bar (515) is inserted into each guide hole (514), and each slide bar (515) is vertically and fixedly connected into the corresponding guide groove (505).

6. The power grid grounding system of claim 4, wherein an indication plate (516) is connected to the two side plates (510) in a sliding manner, a plurality of springs (517) are connected to the bottom of the indication plate (516) and the top of the connection plate (509) in a sliding manner, a connecting rod (520) is fixedly connected to the bottom of the indication plate (516), the bottom of the connecting rod (520) sequentially penetrates through the connection plate (509), the adjusting screw (502) and the side indication rod (518), and one end of the side indication rod (518) penetrates through the side wall of the strut (1) and extends to the outside.

7. A grid earthing system according to claim 6, characterized in that indication scale (519) is provided on the outer side wall of the column (1) corresponding to the side indication rod (518).

8. The power grid grounding system according to claim 1, wherein a transmission cavity (6) is formed in the pillar (1), the transmission gear set (507) is installed in the transmission cavity (6), a driving motor (7) is installed in the transmission cavity (6), and a cylindrical gear set (8) is installed on an output shaft and a rotating shaft of the driving motor (7) together.

9. A grid earthing system according to claim 8, characterized in that the transmission ratio of the cylindrical gear set (8) and the transmission gear set (507) is less than 1.

10. A power grid earthing system according to claim 1, characterized in that the length of said adjusting screw (502) inside the fixing sleeve (501) is greater than the vertical height of the fixing sleeve (501).

Technical Field

The embodiment of the invention relates to the technical field of model tests, in particular to a power grid grounding system.

Background

The movable transformer substation is a high-voltage switch device, a distribution transformer and a low-voltage distribution device, is factory-prefabricated indoor and outdoor compact distribution equipment which is integrated according to a certain wiring scheme, has small volume, compact structure and convenient and flexible installation, can be used for looped networks and terminals, is convenient to convert and improves the reliability of power supply.

The power grid grounding system is used for guaranteeing the safety of a power grid and avoiding the danger of the safety of human bodies and equipment caused by the electrification of the device, and can avoid the interference of an external environment, in the grounding system, a disconnecting switch is an important composition structure, is grounded through the disconnecting switch at a neutral point in a 110Kv mobile substation, is mainly used for isolating a power supply and switching operation and connecting and cutting off a small current circuit, has no arc extinguishing function, and has an insulation distance meeting the specified requirement and an obvious disconnection mark between contacts when the disconnecting switch is in a separated position; switchgear capable of carrying current under normal loop conditions and under abnormal conditions (e.g. short circuit) for a specified period of time when in the closed position is typically used as a high voltage disconnector, i.e. a disconnector rated for voltages above 1 kV.

The existing isolating switch comprises two sections of folding isolating switches, the isolating switches are driven to extend through an isolating switch box to perform switching-on and switching-off operations, two sections of arm bodies of the isolating switches are extended along a joint to be in switching-on contact with a corresponding part, but the height of the joint needs to be considered when the isolating switches are produced and designed, the length of the two sections of arm bodies of the isolating switches is designed according to the data, the overall precision requirement is high, otherwise, the whole section of arm body cannot be straightened to be connected with the joint or the joint fails to be jointed at the joint after the arm body is straightened, so that the isolating knife switch fails, the manufacturing cost is increased due to high precision, the loss is larger after error occurs, and therefore, a power grid grounding system can be designed.

Disclosure of Invention

Therefore, the embodiment of the invention provides a power grid grounding system, which solves the problems of high manufacturing cost and high cost after precision errors occur due to high precision requirements in the design and manufacture of the existing isolating switch.

In order to achieve the above object, an embodiment of the present invention provides the following:

a power grid grounding system comprises a support column and a switch box fixedly connected to the side wall of the support column, wherein the top of the support column is fixedly connected with a plurality of insulators, the tops of the insulators are jointly provided with a bottom plate, and a disconnecting link assembly is arranged on the bottom plate;

the knife switch subassembly includes the adjusting screw who installs bottom in fixed sleeve with bottom plate fixed connection's fixed sleeve and through the bearing is vertical, adjusting screw's top threaded connection has the ejector pin, it is protruding that symmetrical fixedly connected with a plurality of direction is gone up on the lateral wall of ejector pin, correspond the direction arch on fixed sleeve's the inside wall and seted up a plurality of direction recess, and every the protruding equal sliding connection in the direction recess that corresponds of direction, the clamping jaw is installed at the top of ejector pin, adjusting screw's bottom runs through fixed sleeve, bottom plate and one of them insulator in proper order and extends to the pillar in-connection and have drive gear group, just drive gear group installs in the pillar through the pivot, be connected with the rocker on the drive gear group, just the rocker is installed in the switch box.

As a preferable scheme of the invention, the clamping jaw comprises a connecting plate fixedly connected to the top of the ejector rod and side plates symmetrically and fixedly connected to two sides of the edge of the top of the connecting plate, the tops of the two side plates are both connected with pressing sheets through torsion springs, and one sides of the two pressing sheets far away from the side plates are abutted.

As a preferable scheme of the invention, the pressing sheet comprises a pressing plate part and a pressing strip part which are connected with the side plate, the pressing strip part comprises a plurality of pressing strips which are fixedly connected with the side wall of the pressing plate part, the pressing strips on the two pressing strip parts are inserted in a staggered mode, and the tops of the pressing plate part and the pressing strip part are jointly arranged into an arc shape.

In a preferred embodiment of the present invention, the length of the pressing sheet is the same as the height of the side plate, and the length of the pressing strips on the pressing strip portion is greater than half of the length of the pressing sheet.

As a preferable scheme of the invention, the guide protrusions are positioned at the bottom edge of the side wall of the ejector rod, each guide protrusion is provided with a guide hole, a slide rod is inserted into each guide hole, and each slide rod is vertically and fixedly connected in the corresponding guide groove.

As a preferable scheme of the present invention, the two side plates are commonly and slidably connected with an indicating plate, the bottom of the indicating plate and the top of the connecting plate are commonly connected with a plurality of springs, the bottom of the indicating plate is fixedly connected with a connecting rod, the bottom of the connecting rod sequentially penetrates through the connecting plate and the adjusting screw and is fixedly connected with a side indicating rod, and one end of the side indicating rod penetrates through the side wall of the pillar and extends to the outside.

As a preferable scheme of the present invention, the outer side wall of the pillar is provided with an indication scale corresponding to the side indication rod.

As a preferable scheme of the present invention, a transmission cavity is formed in the pillar, the transmission gear set is installed in the transmission cavity, a driving motor is installed in the transmission cavity, and a cylindrical gear set is installed on an output shaft and a rotating shaft of the driving motor together.

In a preferable scheme of the invention, the transmission ratio of the cylindrical gear set and the transmission gear set is smaller than that of the cylindrical gear set and the transmission gear set.

In a preferred embodiment of the present invention, the length of the adjusting screw rod located in the fixing sleeve is greater than the vertical height of the fixing sleeve.

The embodiment of the invention has the following advantages:

the invention can directly lift the clamping jaw to the joint of the clamping jaw and the power grid, only the center of the clamping jaw is aligned with the joint, and the upper limit of the lifting height of the clamping jaw is larger than the joint, so that the required manufacturing precision is lower, the manufacturing cost is also low, and the loss after precision error occurs is also lower.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a power grid grounding system according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of an indication scale portion in the embodiment of the present invention;

fig. 3 is a schematic view of a jaw according to an embodiment of the present invention.

In the figure:

1-a pillar; 2-a switch box; 3, an insulator; 4-a bottom plate; 5-a knife switch component; 6-a transmission cavity; 7-driving a motor; 8-cylindrical gear set;

501-fixing a sleeve; 502-adjusting screw; 503-mandril; 504-guide projection; 505-a guide groove; 506-a clamping jaw; 507-a transmission gear set; 508-rocker; 509-a connecting plate; 510-side plates; 511-tabletting; 512-a pressing plate portion; 513-pressing the strip part; 514-guide holes; 515-a slide bar; 516-an indicator panel; 517-a spring; 518-side indicator bar; 519-indicating scale; 520-link.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

As shown in fig. 1 to 3, the invention provides a power grid grounding system, which includes a support column 1 and a switch box 2 fixedly connected to a side wall of the support column 1, wherein the top of the support column 1 is fixedly connected with a plurality of insulators 3, the tops of the insulators 3 are jointly provided with a bottom plate 4, and the bottom plate 4 is provided with a disconnecting link assembly 5;

the knife switch component 5 comprises a fixing sleeve 501 fixedly connected with a bottom plate and an adjusting screw 502 vertically installed at the bottom in the fixing sleeve 501 through a bearing, the top thread of the adjusting screw 502 is connected with a top rod 503, a plurality of guide protrusions 504 are symmetrically and fixedly connected to the side wall of the top rod 503, a plurality of guide grooves 505 are formed in the inner side wall of the fixing sleeve 501 corresponding to the guide protrusions 504, each guide protrusion 504 is connected to the corresponding guide groove 505 in a sliding mode, a clamping jaw 506 is installed at the top of the top rod 503, the bottom of the adjusting screw 502 penetrates through the fixing sleeve 501 in sequence, the bottom plate 4 and one of the insulators 3 extend into the support column 1 and are connected with a transmission gear set 507, the transmission gear set 507 is installed in the support column 1 through a rotating shaft, a rocker 508 is connected to the transmission gear set 507, and the.

The insulator 3, the pillar 1 and the disconnecting link assembly 5 jointly form an isolating switch for grounding.

When the lifting device is used, the rocker 508 is used for driving, the transmission gear set 507 rotates and is used for changing the transmission direction of force, the adjusting screw rod 502 is driven, and the ejector rod 503 slides and rises in the fixing sleeve 501 through the transmission of the adjusting screw rod 502.

The clamping jaw 506 is located right below the joint, when the top rod 503 rises to a certain height to reach the joint, the clamping jaw 506 is directly abutted against the joint, the joint is a straight rod, the clamping jaw 506 is abutted against the straight rod, and the isolating switch completes switching on.

The whole device only needs to ensure that the ejector rod 503 is higher than the joint when rising to the highest position, the clamping jaw 506 can be directly connected with the joint when the clamping jaw 506 reaches the joint in the rising process, the required design precision is low, only the highest limit of the ejector rod 503 and the relative position of the ejector rod 503 and the joint need to be considered, the required design cost is low, and the loss cost when generating errors is low.

When the clamping jaw is abutted against the straight connecting rod, only the maximum size of the clamping jaw 506 needs to be considered to be larger than the diameter of the straight connecting rod, the required design is simple, and the required manufacturing cost is low.

The push rod 503 slides in the corresponding guide groove 505 through the plurality of guide protrusions 504 during the sliding process of the fixing sleeve 501, so as to limit the push rod 503 to rotate along with the rotation of the adjusting bolt 502, and the push rod 503 can slide and rise along the guide groove 505 under the transmission of the adjusting screw 502.

The clamping jaw 506 comprises a connecting plate 509 fixedly connected to the top of the top rod 503 and side plates 510 symmetrically and fixedly connected to two sides of the top edge of the connecting plate 503, the tops of the two side plates 510 are connected with pressing plates 511 through torsion springs, and one sides of the two pressing plates 511 far away from the side plates 510 are abutted.

In order to further ensure that the clamping jaw 506 is abutted against the joint straight rod, when the clamping jaw 506 rises to the bottom of the joint straight rod, the pressing sheet 511 is abutted against the bottom of the joint straight rod, along with the continuous rising of the top rod 503, the torsion spring at the joint of the pressing sheet 511 and the side plates 510 is compressed, the pressing sheet 511 rotates towards between the two side plates 510, and the pressing sheet 511 is tightly abutted against the joint straight rod through the elasticity of the torsion spring, so that the connection tightness is ensured.

The pressing sheet 511 comprises a pressing plate part 512 and a pressing strip part 513 connected with the side plate 510, the pressing strip part 513 comprises a plurality of pressing strips fixedly connected with the side wall of the pressing plate part 512, the pressing strips on the two pressing strip parts 513 are staggered relatively and inserted, and the tops of the pressing plate part 512 and the pressing strip parts 513 are arranged into an arc shape together.

The pressing strips arranged in a staggered mode enable the pressing strips on one pressing piece 511 to be inserted between two corresponding pressing strips on the other pressing piece 511, so that a longer path can be formed when the connecting straight rod moves on the pressing piece 511, namely the error range of the lifting and stopping of the ejector rod 503 is larger, and the precision requirement is lower.

The arc shape enables the surface of the connecting straight rod and the surface of the pressing sheet 511 to have larger contact area, the connecting effect is better, and the arc transferring effect is better.

The length of the pressing piece 511 is the same as the height of the side plate 510, and the length of the pressing strip on the pressing strip part 513 is larger than half of the length of the pressing piece 511.

The length of the pressing strip is greater than half of the length of the pressing plate 511 in order to prolong the movement path of the straight connecting rod on the pressing plate 511 as much as possible.

The guide protrusions 504 are located at the bottom edge of the side wall of the top rod 503, each guide protrusion 504 is provided with a guide hole 514, a slide bar 515 is inserted into each guide hole 514, and each slide bar 515 is vertically and fixedly connected into a corresponding guide groove 505.

In order to ensure the stability of the movement of the top rod 503 in the fixed sleeve 501, a corresponding slide bar 515 is provided, the guide protrusion 504 moves along the slide bar 515 through the guide hole 514, the slide bar 515 can not only limit the movement posture of the top rod 503 in the fixed sleeve 501, but also reduce the friction area of the guide protrusion 504, so that one end of the guide protrusion 504 can not be abutted against the inner wall of the fixed sleeve 501, the slide bar 515 keeps sliding, and the contact area between the slide bar 515 and the guide protrusion 504 is small, thereby reducing the generation of friction resistance.

Two curb plates 510 are sliding connection jointly has indicator plate 516, and the bottom of indicator plate 516 and the top of connecting plate 509 are connected with a plurality of spring 517 jointly, and indicator plate 516's bottom fixedly connected with connecting rod 520, connecting plate 509, adjusting screw 502 and fixedly connected with side indication pole 518 are run through in proper order to the bottom of connecting rod 520, and the one end of side indication pole 518 runs through the lateral wall of pillar 1 and extends to the outside.

In order to better know the length of the pressing piece 511 pressed by the joint straight rod, when the joint straight rod presses the pressing piece 511 to a certain extent, one end of the pressing piece 511 is pressed against the top of the indicating plate 516, the spring 517 is pressed to deform, and the connecting rod 520 moves downwards, so that the side indicating rod 518 moves downwards on one side of the supporting column 1 to indicate the position of the pressing piece 511.

And the spring force generated by the plurality of springs 517 is applied to the pressing plate 511 through the indicator plate 516, so that the pressing plate 511 is pressed against the engaging straight rod more tightly.

The outer side wall of the strut 1 is provided with an indication scale 519 corresponding to the side indication rod 518.

The indicator marks 519 provide a better indication of the particular positional change of the sheeting 511.

A transmission cavity 6 is formed in the pillar 1, the transmission gear set 507 is installed in the transmission cavity 6, a driving motor 7 is installed in the transmission cavity 6, and a cylindrical gear set 8 is installed on an output shaft and a rotating shaft of the driving motor 7.

The push rod 503 can be automatically driven to move by the driving motor 7, the power of the driving motor 7 is transmitted to the rotating shaft by the cylindrical gear set 8, and then the power is transmitted to the push rod 503 by the transmission gear set 507 to drive the push rod 503 to move.

The gear ratio of the cylindrical gear set 8 and the transmission gear set 507 is less than 1.

When the transmission ratio is smaller than 1, the cylindrical gear set 8 and the transmission gear set 509 are both speed-increasing mechanisms, so that the lifting speed of the mandril 503 is higher, and the connection speed is also higher.

The length of the adjusting screw 502 in the fixing sleeve 501 is greater than the vertical height of the fixing sleeve 501.

The length of the adjusting screw 502 in the fixing sleeve 501 is greater than the length of the fixing sleeve 501, so that the top rod 503 can move to the utmost in the fixing sleeve 501.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.