CN205263244U - Novel high pressure industry frequency alternate current pressurized system measuring platform - Google Patents

Abstract

The utility model discloses a measurement platform for a novel high-voltage power frequency AC withstand voltage system, which includes a current-limiting resistor and a measuring mechanism. One end of the current-limiting resistor is provided with a conductive column in contact with the test transformer, and the other end is provided with a connecting seat. The top of the measurement mechanism is provided with a contact seat that is in contact with the connection seat, the current limiting resistor is supported by a support platform, and the support platform is fixed on the mobile base through a lifting mechanism. The bottom end of the measurement mechanism It is fixed on the lateral movement mechanism, and the said lateral movement mechanism is installed on the mobile base. The current limiting resistor and capacitor voltage divider of the system are installed on the electric vehicle frame to form a platform. The height of the platform can be adjusted, which can realize electric movement conveniently and quickly. The operation of forward and backward is simple and convenient, and the mobility of the system is realized. The space has been optimized to the greatest extent; at the same time, the platform can realize the fast and accurate positioning of the connection part of the current limiting resistor and the connection part of the test transformer, saving a lot of manpower.

Description

New high-voltage power frequency AC withstand voltage system measurement platform

technical field

The utility model relates to a measuring device for a 500kV power frequency AC withstand voltage system.

Background technique

During the operation of power equipment, the insulation will gradually deteriorate under the action of electric field, temperature and mechanical vibration for a long time, including overall deterioration and partial deterioration, forming defects. AC withstand voltage test is the most effective and direct method to identify the insulation strength of electrical equipment, and is an important part of preventive testing. In addition, since the AC withstand voltage test voltage is generally higher than the operating voltage, the equipment has a large safety margin after passing the test, so the AC withstand voltage test is an important means to ensure the safe operation of power equipment.

Under power frequency conditions, due to the large capacitance of the tested product or the high requirements for the test voltage, there are correspondingly high requirements for the power supply capacity of the test device. The 500kV power frequency withstand voltage device (500kV test transformer, current limiting resistor , capacitive voltage divider, voltage regulator, etc.) a single piece is large in size and heavy in weight, it is not convenient for arbitrary combination, and its flexibility is poor. The traditional solution is to weld and fix the experimental device without making any changes, which will occupy most of the effective area of the experimental hall;

According to the survey, the traditional 500kV power frequency withstand voltage device has many disadvantages:

1. The current-limiting resistor and capacitive voltage divider are directly welded with the experimental transformer. Once the equipment fails, it cannot be separated and repaired quickly;

2. The current-limiting resistor and capacitive voltage divider are large in size, and it is difficult to move them manually. In the process of separation and docking, large mechanical equipment such as cranes are needed, which consumes a lot of manpower and material resources;

3. When docking, the relative position of the device needs to be manually observed and the observer and the operator need to cooperate. Due to the large size of the experimental device, it is necessary to predict the relative position of the device based on experience, and there are large errors.

Utility model content

The technical problem to be solved by the utility model is to realize a measurement platform that can realize equipment installation and docking conveniently, quickly and reliably.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a new high-voltage power frequency AC withstand voltage system measurement platform, including a current-limiting resistor and a measuring mechanism, and one end of the current-limiting resistor is provided with a conductive column in contact with the test transformer. The other end is provided with a connecting seat, and the top of the measuring mechanism is provided with a contact seat that is in contact with the connecting seat, and the current-limiting resistor is supported by a supporting platform, and the supporting platform is fixed on the mobile base through a lifting mechanism. The bottom end of the measurement mechanism is fixed on the lateral movement mechanism, and the lateral movement mechanism is installed on the mobile base.

One end of the stroke of the lateral movement mechanism is located below the connecting seat of the current-limiting resistor, and the other end is provided with a fixed frame, and the fixed frame is provided with a hoop for fixing the measuring mechanism, and the bottom of the fixed frame is hinged on On the mobile base, the mobile base is provided with a side lift mechanism that raises the fixed frame from a horizontal state to a vertical state.

The side-lift mechanism includes a side-lift motor, a winding shaft fixed on the output shaft of the side-lift motor, a rope wound on the winding shaft, and a wire rack for supporting the rope, and one end of the rope is fixed on the fixed frame.

The lateral movement mechanism includes a guide rail, a fixed seat installed on the guide rail, a lateral movement screw rod parallel to the guide rail, a lateral movement motor that drives the rotation of the lateral movement screw rod, and cooperates with the lateral movement screw rod And the laterally moving screw nut fixed on the bottom of the fixed seat, the base of the measuring mechanism is provided with an installation hole and fixed on the fixed seat by studs.

A pushing mechanism is fixed on the support platform, and the pushing mechanism includes a bracket for placing the measuring resistance, a pushing motor, a driving roller driven by the pushing motor, and a driven roller matching the supporting bracket of the driving roller.

The connecting seat is composed of four pressure equalizing rings connected by conductive brackets, two of which are vertically arranged, and a horizontally arranged pressure equalizing ring is respectively arranged above and below the two vertically arranged pressure equalizing rings, The bottom surface of the pressure equalizing ring at the bottom is provided with a cavity for contacting the contact seat.

A conductive metal sheet is suspended on the test transformer, and a waist-shaped hole is vertically provided on the conductive metal sheet, and the waist-shaped hole is in a structure with a large top and a small bottom, and the conductive metal sheet is used to support the Conductive posts for current limiting resistors.

The four corners of the bottom surface of the mobile base are provided with universal wheels, and the bottom surface of the mobile base is also provided with a power wheel driven by a motor, and the power wheel is provided with a steering handle.

The lifting mechanism includes a lifting support mechanism and a lifting driving mechanism. The lifting support mechanism is composed of lifting arms arranged crosswise. One end of the lifting arm at the bottom is fixed on the mobile base through a rotating shaft, and the other end is fixed on the mobile base through a slider. Fixed in the chute of the mobile base, the lifting drive mechanism includes a lifting screw parallel to the chute, a lifting motor that drives the lifting screw to rotate, a lifting screw that cooperates with the lifting screw and is fixed on the slider nuts.

The four corners of the mobile base are fixed with threaded rods through the threaded holes, the upper end of the threaded rod is electrically equipped with a rotating handle, and the bottom end is provided with a support block. A level is installed on the mobile base, and the The above-mentioned mobile base is provided with a laser transmitter for aligning the installation position of the test transformer with the conductive column.

The utility model has the following advantages:

1. Save a lot of manpower, material and financial resources

Each overhaul requires the separation of equipment, which requires large-scale hoisting machinery, a lot of manpower, and a lot of time to separate. After the overhaul, it also needs a lot of manpower, material resources, and financial resources for docking, which costs the company every year. High fees. The original intention of the development of this experimental platform is to realize mobility, which can make the separation and docking of experimental equipment easier, does not require a lot of manpower, saves a lot of human resources and thus money for our company, and creates considerable benefits.

2. Save space in the experimental hall

The test hall of the maintenance and test work area of Wuhu Power Supply Company has been upgraded and transformed to undertake the test tasks of power frequency withstand voltage, induction withstand voltage, partial discharge and high-voltage dielectric loss of insulation tools and appliances of 500kV and below, and four small appliances of 220kV and below in Wuhu area. However, the current hall area is small and the space is limited. The 500kV AC withstand voltage system configured in the hall occupies most of the effective area of the hall. The successful development of this platform can stack and move the experimental equipment to the designated position, thus perfectly solving the above-mentioned narrow problem of the experimental hall. Specifically, when the experiment is complete, the separation can be performed quickly. Finally, lower the current-limiting resistor, put the capacitor voltage divider flat, stack the important parts of the experiment on the platform trolley, and drag them to the designated position, thus saving a lot of experimental space.

3. Significant social effect

Safe production is the eternal theme of electric power enterprises, and the safety of electric power equipment will directly affect the safety of electric power enterprises in the production process. The promotion and application of this project will provide an important guarantee for the safe and reliable operation of our company's power grid and electrical equipment, and will have very obvious social benefits. At present, power supply enterprises are advocating the slogan of honest power. The docking accuracy of the power frequency withstand voltage device directly affects the effect of the experiment, and seriously endangers the safety of the power grid and society in emergency situations. Once a power outage occurs due to electrical equipment, the losses caused in all aspects are immeasurable. Especially in today's increasingly tense power supply, the safe and stable operation of power grid equipment reflects social benefits far greater than its economic value, which affects social stability to a certain extent. Therefore, it is extremely important to ensure the insulation performance of power equipment in operation. The measurement platform can be safely and accurately separated and docked by using a movable docking power frequency withstand device to protect the measurement platform. Improve the working conditions and labor intensity of maintenance personnel, effectively prevent the possibility of personal casualties and equipment failure accidents, and this system is novel in appearance, beautiful and easy to use, which is of great significance for enhancing the good image of power supply enterprises in the society . This will help establish a brand of electric power integrity and enhance the good image of power supply enterprises in society.

Description of drawings

The following is a brief description of the content expressed in each piece of drawings in the specification sheet of the utility model and the marks in the figure:

Figure 1 is a schematic diagram of the measurement platform structure;

The marks in the above figures are: 1. Mobile base; 2. Lifting support mechanism; 3. Lifting drive mechanism; 4. Lateral movement mechanism; , contact seat; 9, connection seat; 10, conductive column; 11, current limiting resistor; 12, support platform; 13, push mechanism; 14, test transformer.

detailed description

As shown in Figure 1, the high-voltage power-frequency AC withstand voltage system is mainly composed of a current-limiting resistor 11 and a measuring mechanism 7. The current-limiting resistor 11 needs to be installed horizontally, and one end is provided with a conductive column 10 inserted into the test transformer 14 and electrically connected to it. The other end is provided with a connecting seat 9, and the measuring mechanism 7 is a voltage transformer (can be replaced by a capacitor voltage divider), which is vertically fixed. Fixed, the contact seat 8 is a circular conductive metal seat.

With the rise of the voltage level, the size and weight of the main equipment of the power frequency AC withstand voltage test will increase rapidly. Take the 500kV power frequency AC withstand voltage test as an example: the 500kV test transformer 14 weighs about 14000Kg, the current limiting resistor 11 weighs about 150Kg, and the measuring mechanism 7 weighs about 100Kg, which makes the equipment construction very difficult.

The platform is provided with a mobile base 1, and the current-limiting resistor 11 is supported by a support platform 12. The support platform 12 keeps the current-limiting resistor 11 in a horizontal state. The height of the current limiting resistor 11, and the mobile base 1 of the mobile platform can make the current limiting resistor 11 drop to the bottom, so as to avoid the center of gravity being too high and the equipment toppling over.

The lifting mechanism includes a lifting support mechanism 2 and a lifting driving mechanism 3. The lifting support mechanism 2 is composed of at least two sets of lifting arms arranged crosswise. The block is fixed in the chute of the mobile base 1, so that when the slide block moves in the chute, the support table 12 fixed on the lifting support mechanism 2 can be moved up and down without tilting. In order to ensure the reliable operation of the lifting support mechanism 2, a vertical guide column is provided on the mobile base 1, and the support platform 12 is provided with a guide cylinder extending downward. The guide column cooperates with the guide cylinder to ensure that the lifting support mechanism 2 moves The reliability is high, and the top of the guide column is equipped with a spring seat, so as to slow down the impact force generated during the descent and prevent the equipment from being damaged or toppled over.

The lifting drive mechanism 3 includes a lifting screw mandrel parallel to the chute, a lifting motor that drives the lifting screw mandrel to rotate, and a lifting screw mandrel nut that cooperates with the lifting screw mandrel and is fixed on the slider. The lifting screw is fixed on the mobile base 1 through bearings, and the lifting motor can be connected with the lifting screw through a reduction gear assembly to increase the rotational torque. There are two slide slots on the mobile base 1, and two matching The sliding block, the lifting screw nut is located between the two sliding blocks, and is fixedly connected with the sliding block. In order to distinguish the fixed operation of the lifting support mechanism 2, the lifting support mechanism 2 is provided with two travel switches that respectively control its upper and lower travel limits, and the travel switches output a shutdown signal to the lifting motor of the lifting drive mechanism 3.

In order to prevent the measurement mechanism 7 from interfering with the lifting stroke of the current limiting resistor 11, the bottom end of the measurement mechanism 7 is fixed on the lateral movement mechanism 4, the lateral movement mechanism 4 is installed on the mobile base 1, and the lateral movement mechanism 4 is fixed At one end of the mobile base 1 and perpendicular to the current-limiting resistor 11, when the current-limiting resistor 11 rises to a suitable position, the measuring mechanism 7 is moved to the bottom of the connecting seat 9 of the current-limiting resistor 11 through the lateral movement mechanism 4, and then the lifting mechanism is lowered , use the test transformer 14 and the measuring mechanism 7 to support the current-limiting resistor 11 for measurement work, and when the current-limiting resistor 11 needs to be put down, then use the lateral moving mechanism 4 to move the measuring mechanism 7 to the other end.

The lateral movement mechanism 4 comprises a guide rail, a fixed seat installed on the guide rail, a lateral movement screw mandrel parallel to the guide rail, a lateral movement motor which drives the rotation of the lateral movement screw mandrel, cooperates with the lateral movement screw mandrel and is fixed on a fixed There are two guide rails at the bottom of the seat to move the screw nut laterally, so that the fixed seat can be reliably supported. There are fixed holes (threaded holes) reserved on the fixed seat, which can easily fix the measuring mechanism 7, and the fixing method is convenient Quick installation and disassembly, the lateral movement screw nut is fixed on the two guide rail brackets through bearings, the side movement motor can drive the side movement screw through the reduction gear set, so as to provide sufficient torque and maintain a suitable running speed. The travel base 1 at both ends of the slide rail is provided with a travel switch for controlling the shutdown of the lateral movement motor, so as to avoid excessive displacement of the fixed seat.

In order to facilitate the mobile transport platform, the measuring mechanism 7 needs to be in a horizontal state when not in use, and one end of the stroke of the lateral moving mechanism 4 is located below the connecting seat 9 of the current limiting resistor 11, and the other end is provided with a fixed frame 6, which is half Open arc-shaped support, the open side faces the fixed seat, and at least two hoops are provided on the open side. The hoops are used to fix the measuring mechanism 7 and are detachable structures for easy operation. The bottom side of the fixed frame 6 is hinged on the On the mobile base 1, this side is the tilting direction of the measuring mechanism 7. When the measuring mechanism 7 is tilted in a horizontal state, it is placed side by side with the current limiting resistor 11 on the mobile base 1; on the mobile base 1 on the other side of the fixed frame 6 Be provided with the side lift mechanism 5 that fixed frame 6 is raised into vertical state by horizontal state, promptly fixed side lift mechanism 5 is fixed on the outside of mobile base 1, is also provided with support (in horizontal state) on mobile base 1 in addition. of) the supporting structure of the fixture 6.

The side lift mechanism 5 includes a side lift motor, a bobbin fixed on the output shaft of the side lift motor, a rope wound on the bobbin, a wire rack for supporting the rope, and one end of the rope is fixed on the fixed mount 6 . Preferably, one end of the rope is fixed at the middle part of the fixing frame 6 to ensure a suitable pulling force. The bottom end of fixed mount 6 is provided with guide cylinder, and the opening of this guide cylinder is trumpet-shaped, and mobile base 1 is provided with the spring that vertically arranges with this guide cylinder, cooperates with guide column by spring, utilizes spring to adapt to The arc-shaped trajectory of the guide cylinder can not only play a guiding role, but also play a buffering role in the process of vertically fixing the frame 6, so as to avoid damage to the measuring mechanism 7. Be provided with the travel switch that controls side lift motor to cut off beside this spring in addition, when fixed mount 6 moves to vertical state, fixed mount 6 contacts with this travel switch.

When the measuring platform is working, it is necessary to ensure that the lifting current-limiting resistor 11 and the measuring mechanism 7 are fixed reliably and cannot be shaken. If the mobile base 1 is pushed during work, the parts will shake, or the equipment will collide with each other due to excessive movement and damage will occur. Therefore, a push mechanism 13 is fixed on the supporting platform 12, and the push mechanism 13 includes a bracket for placing a measuring resistance, a push motor, a driving roller driven by the pushing motor, a driven roller that cooperates with the driving roller support bracket, and the driving roller The rubber wheels are used with the driven roller to improve the frictional force, and the pushing mechanism 13 can be used to fine-tune the displacement of the current limiting resistor 11 along its axial direction.

In order to avoid the danger caused by discharge at the end, the connecting seat 9 is composed of four pressure equalizing rings connected by conductive supports, two of which are vertically arranged, and one above and one below the two vertically arranged pressure equalizing rings. The pressure equalizing ring arranged horizontally, the bottom surface of the pressure equalizing ring at the bottom is provided with a concave cavity for contacting the contact seat 8, and the concave cavity is a waist-shaped hole, which can improve the reliability of the support of the contact seat 8, and at the same time use the waist-shaped hole It can also adapt to the support of the connecting seat 9 when the axial displacement of the current limiting resistor 11 occurs.

Because the equipment adopts automatic docking, the existing single-hole type docking brings inconvenience to the docking work. Therefore, a conductive metal sheet is suspended on the test transformer 14, and the conductive metal sheet is vertically arranged to support the conductive column 10. Waist-shaped holes are arranged directly, and the waist-shaped holes are in a structure with a large top and a small bottom, so that the relatively wide upper part is convenient for docking, and the narrow lower part can ensure reliable fixation.

For the convenience of moving, the four corners of the bottom surface of the mobile base 1 are provided with universal wheels, and meanwhile, the bottom surface of the mobile base 1 is also provided with a power wheel driven by a motor, and the power wheel is provided with a steering handle. That is, the power wheel is fixed on the rotatable wheel frame, and the mobile base 1 is operated by the steering handle connected to the wheel frame. The seat 1 can be moved in any direction, and the movement is convenient and labor-saving. The mobile base 1 is provided with a control cabinet and a power supply for controlling the electrical components on the entire platform, and the control cabinet is preferably arranged next to the steering handle to facilitate electrical operations after moving.

During the test of the measuring platform, the mobile base 1 needs to be locked and fixed so that it cannot move. Therefore, there are threaded holes through the four corners of the mobile base 1. Each threaded hole is vertically fixed with a threaded rod. The upper end of the threaded rod The electric is equipped with a rotating handle, which is convenient to turn the threaded rod, and a support block is provided at the bottom, so that the universal wheel can be suspended in the air through the support block by rotating the handle, so as to ensure that the mobile base 1 is fixed and reliable, and a level is installed on the mobile base 1, then When adjusting the rotating handles at the four corners, the levelness of the mobile base 1 can be adjusted conveniently, and the bottom surface of the support block is connected to the cushion block through the rotating shaft, and the friction force when rotating the handle can be reduced through the rotating shaft structure. In addition, the mobile base 1 is provided with a laser emitter for aligning the installation position of the test transformer 14 with the conductive pillar 10, so as to facilitate the adjustment of the position of the mobile base 1 .

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned methods, as long as various insubstantial improvements are made by adopting the method concept and technical solutions of the utility model, or Directly applying the ideas and technical solutions of the utility model to other occasions without improvement is within the protection scope of the utility model.

Claims (10)

1. The measurement platform of the new high-voltage power frequency AC withstand voltage system includes a current-limiting resistor and a measuring mechanism. One end of the current-limiting resistor is provided with a conductive column in contact with the test transformer, and the other end is provided with a connecting seat. The measuring mechanism The top end is provided with a contact seat that is in contact with the connection seat and is characterized in that: the current-limiting resistor is supported by a support platform, the support platform is fixed on the mobile base through a lifting mechanism, and the bottom end of the measurement mechanism is fixed On the lateral movement mechanism, the lateral movement mechanism is installed on the mobile base. 2. The new high-voltage power frequency AC voltage withstand system measurement platform according to claim 1, characterized in that: one end of the stroke of the lateral movement mechanism is located below the connecting seat of the current-limiting resistor, and the other end is provided with a fixed frame. The fixed frame is provided with a hoop for fixing the measuring mechanism, the bottom of the fixed frame is hinged on the mobile base, and the mobile base is provided with a frame that raises the fixed frame from a horizontal state to a vertical state. side lift mechanism. 3. The new high-voltage power frequency AC withstand voltage system measurement platform according to claim 2, characterized in that: the side lift mechanism includes a side lift motor, a winding shaft fixed on the output shaft of the side lift motor, The rope on the spool, the wire rack for supporting the rope, one end of the rope is fixed on the fixed frame. 4. The new high-voltage power frequency AC voltage withstand system measurement platform according to claim 1, 2 or 3, characterized in that: the lateral movement mechanism includes a guide rail, a fixed seat installed on the guide rail, and the guide rail Parallel laterally moving screw rods, a laterally moving motor that drives the laterally moving screw rods to rotate, and a laterally moving screw nut that cooperates with the laterally moving screw rods and is fixed on the bottom of the fixing seat, the base of the measuring mechanism is set There are mounting holes and are fixed on the fixed base by studs. 5. The new high-voltage power frequency AC withstand voltage system measurement platform according to claim 1, characterized in that: a push mechanism is fixed on the support platform, and the push mechanism includes a bracket for placing the measurement resistance, Pushing motor, driving roller driven by pushing motor, driven roller matching driving roller supporting bracket. 6. The measurement platform of the new high-voltage power frequency AC withstand voltage system according to claim 1, characterized in that: the connecting seat is composed of four equalizing rings connected by conductive supports, and two equalizing rings are vertically arranged The two vertical pressure equalizing rings are provided with a horizontal pressure equalizing ring above and below each, and the bottom surface of the pressure equalizing ring at the bottom is provided with a concave cavity for contacting the contact seat. 7. The new high-voltage power frequency AC voltage withstand system measurement platform according to claim 1, characterized in that: the test transformer is suspended with a conductive metal sheet, and the conductive metal sheet is vertically provided with a waist-shaped hole , and the waist-shaped hole has a structure with a large top and a small bottom, and the conductive metal sheet is used to support the conductive column of the current limiting resistor. 8. The new high-voltage power frequency AC voltage withstand system measurement platform according to claim 1, characterized in that: the four corners of the bottom surface of the mobile base are provided with universal wheels, and the bottom surface of the mobile base is also provided with motors The driving power wheel is provided with a steering handle. 9. The new high-voltage power frequency AC withstand voltage system measurement platform according to claim 1, characterized in that: the lifting mechanism includes a lifting support mechanism and a lifting drive mechanism, and the lifting support mechanism is lifted by a cross-set lift One end of the lifting arm at the bottom is fixed on the mobile base through a rotating shaft, and the other end is fixed in the chute of the mobile base through a slider. The lifting drive mechanism includes a lifting screw parallel to the chute, A lifting motor that drives the lifting screw to rotate, and a lifting screw nut that cooperates with the lifting screw and is fixed on the slider. 10. The new high-voltage power frequency AC withstand voltage system measurement platform according to claim 1, characterized in that: the four corners of the mobile base are fixed with threaded rods through the through threaded holes, and the upper ends of the threaded rods are electrically installed. There is a rotating handle, a support block is provided at the bottom, a level is installed on the mobile base, and a laser transmitter for aligning the installation position of the test transformer with the conductive column is provided on the mobile base.