Detection tool for on-load tap-changer moving contact

Abstract

The utility model discloses a detection tool for a moving contact of an on-load tap-changer, which comprises a bottom plate, the top of the bottom plate is vertically and rotatably provided with a screw rod, the screw rod is sleeved with a worm gear, one side of the top of the bottom plate is provided with a hand-operated speed reducer, an output shaft of the hand-operated speed reducer is provided with a worm, the worm is meshed with the worm gear, and two sides of the bottom plate are provided with guide rods. A threaded block is arranged at the bottom of the transverse plate, the threaded block is in threaded connection with the lead screw, the two sides of the transverse plate are slidably connected with the two guide rods respectively, a mounting plate is arranged on one side of the transverse plate, a tension meter is arranged on the mounting plate, a clamping head is arranged at the output end of the tension meter, and a supporting rod is arranged at the position, under the tension meter, of the top of the bottom plate. The top of the supporting rod is horizontally provided with a fixing plate, and the other side of the top of the bottom plate is provided with a loop bar According to the utility model, the clamping force of the moving contact is tested by observing the scale distance on the guide rod and the numerical value displayed on the tension meter, so that the influence on the service life of a product caused by inconsistent clamping forces on the two sides of the moving contact is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to test frock technical field, concretely relates to a detection frock of on-load tap changer moving contact. BACKGROUND

[0002] Tap changer is a kind of voltage regulating device for changing the tap connection position of transformer winding, and is mainly divided into two categories of on-load tap changer and no excitation tap changer:

[0003] On-load tap changer: can operate in the state of transformer excitation or load, changes the tap of transformer winding, changes the number of turns of winding, thereby adjusts the voltage ratio of transformer, realizes the purpose of voltage regulation.The circuit is composed of transition circuit, selection circuit and voltage regulating circuit three parts, and can be divided into switching switch, tap selector and operating mechanism three parts on structure.

[0004] No excitation tap changer: needs to operate in the case of transformer power-off and no excitation, changes the tap position of transformer winding, adjusts the number of turns of winding, and then changes the voltage ratio of transformer, to achieve the effect of voltage regulation.

[0005] As Figure 3 The existing on-load tap changer moving contact, the current detection is generally only detected the clamping force of on-load tap changer moving contact itself, and the two sides of on-load tap changer moving contact are not tested separately, and in the long-term tracking research of subsequent mechanical life and electrical life, it is found that because the clamping force of the two sides of on-load tap changer moving contact is inconsistent, the clamping force of the two sides of on-load tap changer moving contact is inconsistent, which leads to the difference of the two sides of on-load tap changer moving contact in long-term use, and the difference of the two sides of on-load tap changer moving contact leads to the difference of the two sides of on-load tap changer moving contact and affects the mechanical and electrical life of the whole.

[0006] Therefore, the applicant has made beneficial design, found the method for solving the above problems, and the technical scheme to be introduced below is generated in this background. CONTENT OF UTILITY MODEL

[0007] The utility model relates to a detection frock of on-load tap changer moving contact to solve the problems in the above background technology.

[0008] To achieve the above object, the utility model provides the following technical scheme:

[0009] The utility model provides a detection frock of on -load tap changer movable contact head, including the bottom plate, the top of the bottom plate is vertically and rotates to be equipped with the screw rod, is equipped with the worm wheel on the screw rod, one side of the bottom plate top is equipped with hand -operated reducer, the output shaft of hand -operated reducer is equipped with worm, worm and worm wheel are engaged, both sides of the bottom plate are equipped with the guide rod, the horizontal plate is slidably arranged on the guide rod, the bottom of horizontal plate is equipped with the threaded block, the threaded block is screwed with the screw rod, the both sides of horizontal plate are slidably connected with two guide rods respectively, one side of horizontal plate is equipped with the mounting plate, the mounting plate is equipped with the tension meter, the tension meter output is equipped with the chuck, the bottom plate top is located the chuck right below and is equipped with the support rod, the top of support rod is horizontally equipped with the fixed plate, the other side of bottom plate top is equipped with sleeve rod.

[0010] Preferably, the guide rod surface is provided with a scale along the radial direction.

[0011] Preferably, the hand-operated reducer is provided with a hand wheel on the top.

[0012] Preferably, the sleeve rod is provided with a gasket.

[0013] Beneficial effects

[0014] The detection frock of on -load tap changer movable contact head provided by the utility model has one or more of the following technical effects:

[0015] In the utility model, the copper plate of the on -load tap changer movable contact head is sleeved on the sleeve rod during testing, two contacts are clamped on the upper and lower ends of the fixed plate, the chuck is embedded on one of the contacts, the hand wheel is rotated to drive the output shaft of the hand -operated reducer to rotate and drive the worm to rotate, the worm drives the worm wheel to rotate, so that the screw rod rotates, the horizontal plate moves upward through the cooperation of the screw rod and the threaded block, so that the tension meter moves upward to measure the clamping force of the contact, and the direction of the two contacts is adjusted by turning the copper plate up and down during testing, so that the two contacts can be measured respectively. The clamping force of the movable contact is tested by observing the scale distance on the guide rod and the value displayed on the tension meter, so that the influence of the inconsistent clamping force on the product life of the on -load tap changer movable contact is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole three-dimensional structure schematic diagram of the utility model;

[0017] Figure 2 It is the three-dimensional structure schematic diagram of the utility model in use state;

[0018] Figure 3 It is the on -load tap changer movable contact structure schematic diagram of the utility model.

[0019] The correspondence between the labels and component names in the attached figures is as follows:

[0020] 1. Base plate; 2. Lead screw; 3. Worm gear; 4. Hand-cranked reducer; 5. Worm; 6. Guide rod; 7. Horizontal plate; 8. Threaded block; 9. Mounting plate; 10. Tensile gauge; 11. Clamp; 12. Support rod; 13. Fixing plate; 14. Sleeve rod; 15. Scale; 16. Handwheel; 17. Washer; 18. Moving contact of on-load tap changer; 19. Copper plate; 20. Sleeve hole; 21. Support leg clamp; 22. Moving contact; 23. Spring; 24. Contact. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] To avoid excessive and unnecessary details, well-known structures or functions will not be described in detail in the following embodiments.

[0025] like Figures 1-3 As shown, it is a structural schematic diagram of a detection fixture for the moving contact of an on-load tap changer according to a preferred embodiment of the present invention.

[0026] In this embodiment, including the bottom plate 1, the top of the bottom plate 1 is vertically and rotationally provided with a lead screw 2, the lead screw 2 is rotationally connected with the bottom plate 1 through a rotating shaft, a worm gear 3 is sleeved on the lead screw 2, and the worm gear 3 is fixed between the lead screw 2 through screws, one side of the top of the bottom plate 1 is provided with a hand-operated speed reducer 4 (the hand-operated speed reducer 4 in the case is prior art, therefore, no more description is made), an output shaft of the hand-operated speed reducer 4 is provided with a worm 5, the worm 5 is engaged with the worm gear 3, the worm 5 is rotated to drive the worm gear 3 to rotate, the worm gear 3 is rotated to drive the lead screw 2 to rotate, guide rods 6 are arranged on the two sides of the bottom plate 1, the two guide rods 6 are arranged in a vertical direction, a cross plate 7 is slidably arranged on the guide rod 6, a threaded block 8 is arranged at the bottom of the cross plate 7, the threaded block 8 is screwed with the lead screw 2, the threaded block 8 moves up and down along the lead screw 2 when the lead screw 2 rotates, so as to drive the cross plate 7 to move up and down, the two sides of the cross plate 7 are slidably connected with the two guide rods 6 respectively, the two guide rods 6 are used to limit the transverse swing space of the cross plate 7 to reduce errors and play a guiding role, one side of the cross plate 7 is provided with a mounting plate 9, the mounting plate 9 forms a 90-degree angle with the cross plate 7, a tension meter 10 is arranged on the mounting plate 9, a chuck 11 is arranged at the output end of the tension meter 10, support rods 12 are arranged below the tension meter 10 on the top of the bottom plate 1, the two support rods 12 are provided with a fixed plate 13 arranged horizontally at the top of the two support rods 12, a sleeve rod 14 is arranged on the other side of the top of the bottom plate 1, and the sleeve rod 14 is used for sleeving a copper plate 19 of a load ratio tap changer moving contact 18 on the sleeve rod 14.

[0027] In this embodiment, scales 15 are arranged on the surfaces of the guide rods 6 in a radial direction. The distance value of the cross plate 7 moving along the guide rod 6 is observed through the scales 15.

[0028] In this embodiment, a hand wheel 16 is arranged on the top of the hand-operated speed reducer 4. The output shaft of the hand-operated speed reducer 4 is rotated by shaking the hand wheel 16 (the hand-operated speed reducer 4 in the case is prior art, therefore, no more description is made).

[0029] In this embodiment, a gasket 17 is sleeved on the sleeve rod 14. The gasket 17 is used for being placed on the sleeve rod 14 after the direction of a foot clamp 21 of the load ratio tap changer moving contact 18 is adjusted to adapt the height.

[0030] In this embodiment, the load ratio tap changer moving contact 18 comprises the copper plate 19, a sleeve hole 20 is arranged in the middle of the copper plate 19, the foot clamp 21 is arranged at the bottom of the copper plate 19, two groups of moving contacts 22 are arranged on one side of the copper plate 19, each group of the moving contacts 22 comprises two elastic sheets 23 arranged above and below, and contacts 24 are arranged on the inner sides of the two elastic sheets 23.

[0031] The operation principle of the utility model is as follows:

[0032] In the test, the copper plate 19 of the movable contact 18 of the on-load tap-changer is sleeved on the sleeve rod 14, the two contacts 24 are clamped on the upper and lower ends of the fixed plate 13 respectively, the clamping head 11 is clamped on one of the contacts 24, the hand wheel 16 is rotated to drive the output shaft of the hand-operated speed reducer 4 to rotate the worm 5, the worm 5 drives the worm gear 3 to rotate, so that the lead screw 2 rotates, the horizontal plate 7 moves upward through the cooperation of the lead screw 2 and the threaded block 8, so that the tension meter 10 moves upward to measure the clamping force of the contact 24. In the test, the copper plate 19 is turned over and sleeved on the sleeve rod 14, so that the directions of the two contacts 24 are adjusted, and the two contacts 24 are measured respectively. The clamping force of the movable contact 22 is tested by observing the scale 15 on the guide rod 6 and the value displayed on the tension meter 10.

[0033] The installation mode, connection mode or setting mode of the detection tool of the movable contact of the on-load tap-changer are all common mechanical modes, and any mode that can achieve the beneficial effects can be implemented.

[0034] The technologies not described in detail in the utility model are all known technologies, and the skilled person in the art can easily implement the utility model on the basis of understanding the specification, and the contents represented in the drawings are part of the specification.

[0035] The above content is a further detailed description of the utility model combined with the specific embodiments, and cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary skilled person in the art to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, which should be regarded as belonging to the protection scope determined by the claims submitted by the utility model.

Claims

1. A detection tool for a movable contact of an on-load tap changer, characterized in that: The utility model relates to a kind of vertical and rotating screw rod (2) is provided on the top of bottom plate (1), worm gear (3) is sleeved on the screw rod (2), hand-operated reducer (4) is provided on the top of bottom plate (1) one side, the output shaft of hand-operated reducer (4) is equipped with worm (5), worm (5) is engaged with worm gear (3), guide rod (6) is equipped with on the both sides of bottom plate (1), horizontal plate (7) is slidably equipped on guide rod (6), the bottom of horizontal plate (7) is equipped with threaded block (8), threaded block (8) is screwed with screw rod (2), the both sides of horizontal plate (7) are slidably connected with two guide rods (6) respectively, mounting plate (9) is equipped on the one side of horizontal plate (7), tension meter (10) is equipped on mounting plate (9), the output end of tension meter (10) is equipped with chuck (11), support rod (12) is equipped on the top of bottom plate (1) and is located just below tension meter (10), fixed plate (13) is horizontally equipped on the top of support rod (12), sleeve rod (14) is equipped on the other side of the top of bottom plate (1).

2. The detection tool for the movable contact of the on-load tap changer according to claim 1, characterized in that: Scale (15) is equipped on the surface of guide rod (6) along radial direction.

3. The detection tool for the movable contact of the on-load tap changer according to claim 1, characterized in that: Hand wheel (16) is equipped on the top of hand-operated reducer (4).

4. The detection tool for the movable contact of the on-load tap changer according to claim 1, characterized in that: Gasket (17) is sleeved on the sleeve rod (14).

Images