A ground driving device for linear motion

Abstract

The present invention discloses a grounding drive device for linear motion, comprising: the grounding position bracket is installed at the grounding point of the high-voltage equipment; the driving module cooperates with the grounding position bracket to complete the switching between the grounding position and the running position of the high-voltage equipment; the control module is used to control the driving module so that the driving module and the grounding position bracket cooperate with each other. The present invention provides a grounding drive device for linear motion, using a linear cylinder as an actuator, connecting the cylinder piston rod to the grounding rod, so that the parallel-arranged grounding rods follow the cylinder to synchronously perform reciprocating linear motion, realizing functional conversion in a smaller space, and enabling the grounding device to be arranged in parallel with the main circuit breaker. It has a simple mechanical structure and a smaller space volume, which is conducive to arrangement in a cabinet in a narrow space. Compared with the existing rotary-driven grounding device, its mechanical structure is simpler, providing a new driving method for the grounding device of the high-voltage equipment box.

Description

Technical Field

[0001] The present invention relates to the technical field of grounding drive, and in particular to a grounding drive device for linear motion. Background Art

[0002] The main function of the existing grounding device or high-voltage grounding switch is to ground the circuits on both sides of the main circuit breaker on the electric locomotive to ensure the safe operation of the electric locomotive; when the staff conducts locomotive inspection and maintenance, it ensures the personal safety of the staff.

[0003] At present, there are mainly two types of high-voltage grounding switches used in electric locomotives and EMUs:

[0004] One is the manual operation mode. When the staff performs maintenance, they manually operate the high-voltage grounding switch handle inside the vehicle or outside the cabinet to switch the high-voltage grounding switch from the "running position" to the "grounding position" to achieve the grounding of the circuits on both sides of the main circuit breaker. This manual operation mode is more dangerous, laborious and troublesome.

[0005] The other is pneumatic control, which uses a linear cylinder or a rotary cylinder as an actuator, and cooperates with a mechanical conversion mechanism to convert the linear motion of the cylinder into the circular motion of the rotating arm, or directly uses a rotary cylinder to control the rotating arm to perform circular motion, thereby realizing automatic conversion between the "operating position" and the "engagement position".

[0006] For the high-voltage grounding switches of the above two operating modes, since the rotation angle of the rotating arm needs to meet the requirements of the electrical clearance (the current common rotation angle is 110°~160°), the entire high-voltage grounding switch occupies a large area and requires a certain rotation and swinging space for layout, which is not conducive to installation in the cabinet, especially in the solid-state high-voltage box. Summary of the invention

[0007] In order to solve the problem that the existing press-to-ground switch occupies a large area and requires a certain rotation and swinging space for arrangement, the present invention proposes a linear motion grounding drive device.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A grounding drive device for linear motion, comprising:

[0010] A grounding support, wherein the grounding support is installed at a grounding point of a high voltage device;

[0011] A driving module, wherein the driving module cooperates with the grounding position bracket to complete the switching between the grounding position and the operating position of the high-voltage equipment;

[0012] A control module is used to control the driving module so that the driving module and the grounding support cooperate with each other.

[0013] As a further improvement of the above technical solution:

[0014] Preferably, the driving module includes a driving base plate, a bracket assembly arranged on the upper end of the driving base plate, a telescopic part arranged on the bracket assembly and connected to the control module, and a grounding rod arranged on the bracket assembly and connected to the telescopic part through a connecting plate, and the end of the grounding rod corresponds to the position of the grounding bracket.

[0015] Preferably, the bracket assembly includes a rear bracket arranged at the rear end of the driving base plate, an operating position bracket arranged at the front end of the driving base plate, and a guide seat arranged between the two ends of the driving base plate, the two ends of the telescopic member are arranged on the rear bracket and the operating position bracket, and the grounding rod is slidably arranged in the guide seat and the operating position bracket.

[0016] Preferably, a shaft sleeve is provided on the rear bracket, a buffer sleeve is provided inside the shaft sleeve, and the end of the grounding rod can be inserted into the shaft sleeve.

[0017] Preferably, a guide sleeve is arranged in the guide seat.

[0018] Preferably, a first strap contact finger is provided at the front end of the grounding rod, and a second strap contact finger is provided on the bracket assembly.

[0019] Preferably, the control module includes a control base plate, a filter element fixed on the control base plate by a baffle and connected to the air inlet, a solenoid valve connected to the filter element by a pipeline, and a speed regulation component connected to the solenoid valve by a pipeline, the speed regulation component is connected to the first air outlet and the second air outlet, and the first air outlet and the second air outlet are connected to the drive module through an air pipe.

[0020] Preferably, a first muffler and a second muffler are provided on the solenoid valve.

[0021] Preferably, a plug is further provided on the control base plate, an O-ring is provided on the plug for sealing, and the plug is used for draining and repairing the cavity of the filter element.

[0022] Preferably, the speed regulating assembly includes a first intake check valve assembly, a first exhaust check valve assembly, a second intake check valve assembly and a second exhaust check valve assembly, all of which are fixedly arranged on the control base plate; the first exhaust check valve assembly and the first intake check valve assembly are connected to the intake pipeline or the exhaust pipeline, and the second exhaust check valve assembly and the second intake check valve assembly are connected to the exhaust pipeline or the intake pipeline.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Whether the existing grounding device or high-voltage grounding switch is manually operated or pneumatically controlled, the goal is to make the rotating arm of the device perform circular motion and rotate a certain angle to achieve the conversion between the "operating position" and the "grounding position". The present invention provides a grounding drive device with linear motion, which uses a linear cylinder as an actuator, connects the cylinder piston rod to the grounding rod, and makes the parallelly arranged grounding rods follow the cylinder to perform reciprocating linear motion synchronously, thereby realizing functional conversion in a smaller space, and enabling the grounding device to be arranged in parallel with the main circuit breaker. It has a simple mechanical structure and a smaller space volume, which is conducive to arrangement in a cabinet in a small space. Compared with the existing rotary-driven grounding device, its mechanical structure is simpler, and a new driving method is provided for the grounding device of the high-voltage equipment box.

[0025] 2. The grounding drive device is equipped with a speed regulation function. An intake check valve assembly and an exhaust check valve assembly are respectively provided in the two air passages of the reciprocating motion of the cylinder piston. The intake check valve assembly and the exhaust check valve assembly adopt a modular design, and realize the intake and exhaust functions by using different assembly directions. The intake and exhaust of a single circuit can be adjusted simultaneously, and the adjustment is more sensitive and convenient. The reciprocating linear motion of the cylinder can be extremely conveniently regulated through the control module, and the time of the reciprocating motion of the grounding rod extending and retracting can be accurately controlled, and the speed regulation between the two does not interfere with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall front view structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the front view structure of the control module of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of a control module of the present invention from top view;

[0029] Figure 4 It is a schematic diagram of the right view structure of the control module of the present invention;

[0030] Figure 5 It is a schematic diagram of the gas circuit principle of the control module of the present invention.

[0031] In the figure: 1. grounding position bracket; 2. first strap contact finger; 3. connecting plate; 4. second strap contact finger; 5. guide sleeve; 6. guide seat; 7. drive module; 8. drive base plate; 9. grounding rod; 10. cylinder; 11. buffer sleeve; 12. bushing; 13. rear bracket; 14. running position bracket; 15. solenoid valve; 16. control module; 17. speed control assembly; 18. control base plate; 19. first coil; 20. second coil; 21. filter element; 22. plug; 23. baffle; 24. O-ring; 25. first intake check valve assembly; 26. first exhaust check valve assembly; 27. second intake check valve assembly; 28. second exhaust check valve assembly; 29. ​​air inlet; 30. first muffler; 31. second muffler; 32. first air outlet; 33. second air outlet. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] This technical solution specifically includes the following components:

[0035] Please refer to the attached Figure 1 The present invention mainly includes two parts, one is the driving module 7, and the other is the control module 16.

[0036] By the attached Figure 1 It can be known that an important part of the driving module 7 is the grounding position bracket 1, which is installed at the grounding point of the high-voltage equipment (such as the main circuit breaker). The operating position and the grounding position are converted by the grounding position bracket 1. In addition, there is a driving base plate 8, on which the operating position bracket 14, the guide seat 6 and the rear bracket 13 are fixedly installed from left to right by bolts. The selection of the cylinder 10 is one way in the present technical solution, but if other telescopic parts are used to complete this function, it should also belong to the scope of the present invention. The front end connects the piston rod of the cylinder 10 to the grounding rod 9 through the connecting plate 3. At the same time, the cylinder 10 is arranged in parallel with the grounding rod 9, and the front end of the grounding rod 9 is opposite to the grounding position.

[0037] At the same time, the grounding rod 9 passes through the guide sleeve 5 in the guide seat 6. The guide sleeve 5 is used to guide the linear movement of the grounding rod 9. At the same time, the buffer sleeve 11 is fixed to the rear bracket 13 through the shaft sleeve 12, so that the grounding rod 9 can be inserted. It is used for buffering the end of the return movement of the grounding rod 9. At the same time, the grounding rod 9 is relatively fixed when the device is in the operating position, and will not swing significantly due to the vibration of the locomotive. The grounding rod 9 slides and passes through the operating position bracket 14.

[0038] A first strap contact finger 2 is mounted at the front end of the grounding rod 9, and a second strap contact finger 4 is mounted in the inner hole of the operating position bracket 14, which is used for contact and conduction of the sliding connector under high voltage and high current conditions.

[0039] The grounding rod 9 is made of silicon bronze, which is wear-resistant, corrosion-resistant, and has excellent electrical conductivity. The front end is equipped with a first strap contact finger 2, which can realize reciprocating plug-in and pull-out applications under high voltage and high current with the grounding position bracket 1 installed at the high-voltage equipment end. The inner hole of the first muffler 30 running position bracket 14 is also equipped with a second strap contact finger 4, which can realize the sliding application of the grounding rod 9 inside it and reliably conduct its high current. The strap contact finger can be selected as one or more according to the actual application current parameters. The grounding position bracket 1 can be designed with an interface according to actual needs.

[0040] The cylinder 10 can select different strokes according to the electrical parameters of the application conditions to meet the requirements of the electrical clearance. The guide sleeve 5 assembled on the guide seat 6 of the first muffler 30 is made of lead brass and is designed with a guide bevel to achieve the precise introduction of the large stroke reciprocating motion of the grounding rod 9 and the long-life wear-resistant characteristics. The grounding bracket 1 and the buffer sleeve 11 of the first muffler 30 are also designed with a guide bevel to facilitate the accurate introduction of the grounding rod 9 to the corresponding position at the end of the reciprocating motion.

[0041] As attached Figure 1 To Attachment Figure 4 As shown, the control module 16 is specifically as follows: an air inlet 29 is provided on the control base plate 18, and the air inlet 29 is connected to the external air source through a pipeline. A filter element 21 is fixed on the control base plate 18 by a baffle 23 at the air inlet 29, and a plug 22 is provided on the filter element 21. The plug 22 is installed on the control base plate 18 and is provided with an O-ring 24 to achieve sealing. The plug 22 can be loosened to perform drainage maintenance on the cavity of the filter element 21.

[0042] A solenoid valve 15 is also provided on the control base plate 18. The solenoid valve 15 is connected to the filter element 21 through a pipeline. The solenoid valve 15 is a two-position five-way valve. The two air outlet pipelines of the solenoid valve 15 flow to the first air outlet 32 ​​and the second air outlet 33 respectively after passing through the speed regulating component 17. The first air outlet 32 ​​and the second air outlet 33 are connected to the two ends of the cylinder 10. A first muffler 30 and a second muffler 31 are also provided on the solenoid valve 15 for exhaust.

[0043] The speed regulating assembly 17 includes a first intake check valve assembly 25, a first exhaust check valve assembly 26, a second intake check valve assembly 27 and a second exhaust check valve assembly 28, all of which are fixedly arranged on the control base plate 18 of the first muffler 30. The first muffler 30, the first exhaust check valve assembly 26 and the first intake check valve assembly 25 are connected to the intake pipeline or the exhaust pipeline, and the first muffler 30, the second exhaust check valve assembly 28 and the second intake check valve assembly 27 are connected to the exhaust pipeline or the intake pipeline to realize the speed regulating and one-way conduction functions of their respective passages. The first muffler 30, the first intake check valve assembly 25, the first exhaust check valve assembly 26, the second intake check valve assembly 27 and the second exhaust check valve assembly 28 are connected in a manner such that the same components realize the intake and exhaust functions in different assembly directions.

[0044] The working process and principle of this technical solution:

[0045] 1) Running position → Connecting position

[0046] The compressed air enters the control module 16 from the air inlet 29 , and flows through the internal pipeline of the control base plate 18 to the filter element 21 . The filtered air then flows through the internal pipeline of the control base plate 18 to the air inlet 29 of the solenoid valve 15 .

[0047] At this time, if the attached Figure 5 As shown, the first coil 19 of the solenoid valve 15 is energized to realize the internal "1-2 position" conduction. After the compressed air flows out of the solenoid valve 15, it is divided into two parts through the internal pipeline of the control base plate 18 and enters the speed regulating assembly 17, and is regulated by the first intake check valve assembly 25 and the first exhaust check valve assembly 26. Due to the design of the check valve, only the first intake check valve assembly 25 of the two routes can be conducted. After the compressed air is speed-controlled inside the first intake check valve assembly 25, it flows to the second air outlet 33; at the same time, the gas of the first exhaust check valve assembly 26 in the two routes is not conducted.

[0048] The compressed air continues to flow from the second air outlet 33 through the air pipe to the rear end of the cylinder 10 of the driving module 7, driving the piston rod of the cylinder 10 to extend, driving the grounding rod 9 to move linearly and extend, and the front end of the grounding rod 9 is inserted into the grounding position bracket 1 installed at the high-voltage equipment end. The first strap contact finger 2 installed on the grounding rod 9 ensures reliable grounding, and the device is in the "grounding position".

[0049] At the same time, during the extension movement of the cylinder 10, the discharged compressed air passes through the front end of the cylinder 10 and enters the control module 16 from the first air outlet 32 ​​along the air pipe. Similarly, the internal pipeline of the control base plate 18 is divided into two and enters the speed regulating assembly 17, which is regulated by the second intake check valve assembly 27 and the second exhaust check valve assembly 28; due to the design of the check valve, only the second exhaust check valve assembly 28 can be conducted in the two routes, and the compressed air flows to the solenoid valve 15 after the speed is controlled inside the second exhaust check valve assembly 28. At this time, the internal position of the solenoid valve 15 is "4-5" and the compressed air is finally discharged to the atmosphere through the second muffler 31; at the same time, the gas of the second intake check valve assembly 27 in the two routes is not conducted.

[0050] During the entire unidirectional movement, the compressed air is bilaterally regulated through the first intake check valve assembly 25 and the second exhaust check valve assembly 28. Compared with the exhaust throttling speed regulation of the traditional cylinder 10, it is more precise and controllable, and the regulation efficiency is greatly improved.

[0051] 2) Connecting position → Running position

[0052] The compressed air enters the control module 16 from the air inlet 29 , and flows through the internal pipeline of the control base plate 18 to the filter element 21 . The filtered air then flows through the internal pipeline of the control base plate 18 to the air inlet 29 of the solenoid valve 15 .

[0053] At this time, if the attached Figure 5 As shown, the second coil 20 of the solenoid valve 15 is energized to realize the internal "1-4 position" conduction. After the compressed air flows out of the solenoid valve 15, it is divided into two parts through the internal pipeline of the control base plate 18 and enters the speed regulating assembly 17, and is regulated by the second intake check valve assembly 27 and the second exhaust check valve assembly 28. Due to the design of the check valve, only the second intake check valve assembly 27 can be conducted in the two paths. After the compressed air is speed-controlled inside the second intake check valve assembly 27, it flows to the first air outlet 32; at the same time, the gas in the second exhaust check valve assembly 28 in the two paths is not conducted.

[0054] The compressed air continues to flow from the first air outlet 32 ​​through the air pipe to the front end of the cylinder 10 of the drive module 7, driving the piston rod of the cylinder 10 to retract, driving the grounding rod 9 to retract in a straight line, and the end of the grounding rod 9 is inserted into the buffer sleeve 11, and the device is in the "operating position".

[0055] At the same time, during the retraction movement of the cylinder 10, the discharged compressed air passes through the rear end of the cylinder 10 and enters the control module 16 from the second air outlet 33 along the air pipe. Similarly, the internal pipeline of the control base plate 18 is divided into two and enters the speed regulating assembly 17, which is regulated by the first intake check valve assembly 25 and the first exhaust check valve assembly 26; due to the design of the check valve, only the first exhaust check valve assembly 26 can be conducted in the two routes, and the compressed air flows to the solenoid valve 15 after the speed is controlled inside the first exhaust check valve assembly 26. At this time, the internal position of the solenoid valve 15 is "2-3" and the compressed air is finally discharged to the atmosphere through the first muffler 30; at the same time, the gas of the first intake check valve assembly 25 in the two routes is not conducted.

[0056] During the entire unidirectional movement, the compressed air is bilaterally regulated by the second intake check valve assembly 27 and the first exhaust check valve assembly 26. Compared with the exhaust throttling speed regulation of the traditional cylinder 10, it is more precise and controllable, and the regulation efficiency is greatly improved.

[0057] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A grounding drive device for linear motion, characterized in that: include: A grounding support (1), wherein the grounding support (1) is installed at a grounding point of a high-voltage device; A driving module (7), wherein the driving module (7) cooperates with a grounding position bracket (1) to complete the switching between the grounding position and the operating position of the high-voltage device, the driving module (7) comprising a driving base plate (8), a bracket assembly arranged at the upper end of the driving base plate (8), a telescopic member arranged on the bracket assembly and connected to the control module (16), and a grounding rod (9) arranged on the bracket assembly and connected to the telescopic member via a connecting plate (3), wherein the end of the grounding rod (9) corresponds to the position of the grounding position bracket (1); The support assembly comprises a rear support (13) arranged at the rear end of the driving base plate (8), an operating position support (14) arranged at the front end of the driving base plate (8), and a guide seat (6) arranged between the two ends of the driving base plate (8), the two ends of the telescopic member are arranged on the rear support (13) and the operating position support (14), and the grounding rod (9) is slidably arranged in the guide seat (6) and the operating position support (14); A control module (16), the control module (16) being used to control the drive module (7) so that the drive module (7) and the grounding support (1) cooperate with each other; The control module (16) comprises a control base plate (18), a filter element (21) fixedly arranged on the control base plate (18) via a baffle (23) and connected to an air inlet (29), a solenoid valve (15) connected to the filter element (21) via a pipeline, and a speed regulating component (17) connected to the solenoid valve (15) via a pipeline, the speed regulating component (17) being connected to a first air outlet (32) and a second air outlet (33), and the first air outlet (32) and the second air outlet (33) being connected to a drive module (7) via an air pipe; The control module (16) controls the telescopic member to achieve telescopic movement, and the telescopic member drives the grounding rod (9) to perform telescopic movement, so that the grounding rod (9) and the grounding position bracket (1) are in contact and out of contact, thereby achieving the conversion between the "operating position" and the "grounding position".

2. The grounding driving device for linear motion according to claim 1, characterized in that: The rear bracket (13) is provided with a shaft sleeve (12), a buffer sleeve (11) is provided inside the shaft sleeve (12), and the end of the grounding rod (9) can be inserted into the shaft sleeve (12).

3. The grounding driving device for linear motion according to claim 1, characterized in that: A guide sleeve (5) is arranged inside the guide seat (6).

4. The grounding driving device for linear motion according to claim 1, characterized in that: A first watchband contact finger (2) is arranged at the front end of the grounding rod (9), and a second watchband contact finger (4) is arranged on the bracket assembly.

5. The grounding driving device for linear motion according to claim 1, characterized in that: The solenoid valve (15) is provided with a first silencer (30) and a second silencer (31).

6. The grounding driving device for linear motion according to claim 1, characterized in that: The control base plate (18) is also provided with a plug (22), the plug (22) is provided with an O-ring (24) for sealing, and the plug (22) is used to drain and inspect the cavity of the filter element (21).

7. The grounding driving device for linear motion according to claim 1, characterized in that: The speed regulating assembly (17) comprises a first intake check valve assembly (25), a first exhaust check valve assembly (26), a second intake check valve assembly (27) and a second exhaust check valve assembly (28), all of which are fixedly arranged on the control base plate (18); the first exhaust check valve assembly (26) and the first intake check valve assembly (25) are connected to an intake pipeline or an exhaust pipeline, and the second exhaust check valve assembly (28) and the second intake check valve assembly (27) are connected to an exhaust pipeline or an intake pipeline.

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