Buffer device of pneumatic closing and opening structure

Abstract

The utility model provides a buffer device of a pneumatic switching-on and switching-off structure, which relates to the technical field of switching-on and switching-off buffer devices and comprises a buffer mechanism, and the upper end of the buffer mechanism is connected with a first mounting assembly used for mounting the upper end of the buffer mechanism through a movable assembly. And a second mounting assembly for mounting the lower end of the buffer mechanism is arranged at the lower end of the buffer mechanism. According to the buffer device of the pneumatic switching-on and switching-off structure, when a high-voltage circuit breaker body is switched on, a switch is pressed, a spring mechanism completing energy storage drives a U-shaped mounting plate to reset along with a rotating plate, and then an outer cylinder drives a push rod and a piston to compress air in an inner cylinder and a compression shell; and when the air in the inner cylinder and the compression shell is continuously compressed, the buffering effect is stronger and stronger, and a good buffering effect is achieved on internal devices of the high-voltage circuit breaker.

Description

Technical Field

[0001] The utility model relates to a buffer device, in particular to a buffer device of a pneumatic closing and opening switch structure, belonging to the technical field of closing and opening switch buffer devices. Background Art

[0002] High-voltage circuit breakers are important control and protection equipment in power systems, and spring mechanisms are an indispensable and important component of high-voltage circuit breakers. They not only need to ensure that the circuit breaker accurately opens and closes short-circuit currents and reliably remains in the open or closed position, but also need to complete rapid automatic reclosing operations and have functions such as anti-jumping, automatic resetting and locking.

[0003] The spring mechanism generates a large impact force during the opening and closing operations, which not only causes mechanical impact damage to the high-voltage switch equipment, but also causes the contacts to bounce when closing, resulting in unstable contact and affecting the reliable operation of the fast earthing switch. Therefore, a buffer device needs to be installed on the high-voltage switch.

[0004] The oil buffer device is installed by riveting, which is inconvenient to disassemble. When the internal structural components are damaged, it is inconvenient to replace them, which directly affects the working performance and reliability of the high-voltage circuit breaker. For this reason, we provide a buffer device with a pneumatic closing and opening structure. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The purpose of the utility model is to provide a buffer device of a pneumatic closing and opening structure in order to solve the above-mentioned problem, which is easy to disassemble and repair and can have a good buffering effect on the internal components of the high-voltage circuit breaker.

[0007] (II) Technical solution

[0008] The utility model is implemented by the following technical scheme: a buffer device of a pneumatic closing and opening brake structure, comprising a buffer mechanism, the upper end of the buffer mechanism is connected to a first mounting assembly for mounting the upper end of the buffer mechanism through a movable assembly, and the lower end of the buffer mechanism is provided with a second mounting assembly for mounting the lower end of the buffer mechanism;

[0009] The buffer mechanism includes an outer cylinder, an inner top wall of the outer cylinder is fixedly connected to a push rod, a piston is fixedly installed on the lower end of the push rod, the inner wall of the outer cylinder is slidably connected to an inner cylinder whose inner wall is in sliding contact with the circumferential side of the piston, the lower end of the inner cylinder is fixedly connected to a compression shell, the circumferential side of the compression shell is provided with evenly distributed air holes, and the top surface of the outer cylinder and the bottom surface of the compression shell are respectively fixedly connected to an upper connecting ring and a lower connecting ring.

[0010] Preferably, the buffer mechanism also includes a fixing ring fixedly connected to the circumferential side of the outer cylinder and the inner cylinder, and a buffer spring is fixedly installed on the side where the two fixing rings are close to each other. The buffer effect can be further improved by the matching setting between the fixing ring and the buffer spring.

[0011] Preferably, a sealing gasket is fixedly connected to the top surface of the piston, and the sealing gasket is sleeved on the circumferential side of the push rod. The provision of the sealing gasket can further improve the sealing performance inside the device.

[0012] Preferably, the first mounting assembly includes a U-shaped mounting plate, to which reinforcing ribs are fixedly connected, and a mounting hole is provided on one side of the U-shaped mounting plate, so that the device can be easily installed through the U-shaped mounting plate and the reinforcing ribs.

[0013] Preferably, the movable component includes a sliding column fixedly connected to a side surface of the U-shaped mounting plate, the circumferential side surface of the sliding column is provided with an external thread, the sliding column is threadedly connected to a threaded sleeve via the external thread, and the upper connecting ring is sleeved on the sliding column. The matching arrangement between the sliding column, the external thread and the threaded sleeve facilitates the installation of the outer cylinder body and the upper connecting ring.

[0014] Preferably, a gasket is provided on a side of the threaded sleeve close to the upper connecting ring. The provision of the gasket can prevent the upper connecting ring from being rubbed by the threaded sleeve, which would cause wear on the upper connecting ring.

[0015] Preferably, the second mounting assembly includes a base plate, the top surface of which is fixedly connected to two fixing plates, a rotating shaft is fixedly connected between the two fixing plates, the circumferential side surface of the rotating shaft is rotatably connected to the reserved hole of the lower connecting ring, and bolts are provided at the four corners of the base plate. The coordination arrangement among the base plate, the fixing plate, the rotating shaft and the bolts facilitates the installation of the device.

[0016] The utility model provides a buffer device for a pneumatic closing and opening brake structure, which has the following beneficial effects:

[0017] 1. The buffer device of the pneumatic closing and opening structure, when the high-voltage circuit breaker body is closed, press the switch, and the spring mechanism that has completed the energy storage will drive the U-shaped mounting plate to reset together with the rotating plate, and then drive the push rod and the piston through the outer cylinder to compress the air inside the inner cylinder and the compression shell. When the air in the inner cylinder and the compression shell continues to be compressed, the buffering effect becomes stronger and stronger, which has a good buffering effect on the internal components of the high-voltage circuit breaker.

[0018] 2. The buffer device of the pneumatic closing and opening switch structure can be installed on the rotating plate of the high-voltage circuit breaker body through the matching arrangement of the U-shaped mounting plate, the sliding column, the external thread, the threaded sleeve and the gasket, and the lower end of the device can be installed on the inner bottom wall of the shell through the matching arrangement between the bottom plate, the fixed plate, the rotating shaft and the bolts. The device is easy to disassemble and assemble for maintenance or replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 This is a cross-sectional view of the internal structure of the buffer mechanism of the utility model;

[0021] Figure 3 It is an exploded view of the active components of the utility model;

[0022] Figure 4 This is a schematic diagram of the assembly of the utility model;

[0023] Figure 5 It is an enlarged schematic diagram of the structure at point A of the present utility model.

[0024] Description of Reference Numerals

[0025] 1. Buffer mechanism; 101. Outer cylinder; 102. Push rod; 103. Piston; 104. Inner cylinder; 105. Compression shell; 106. Air vent; 107. Upper connecting ring; 108. Lower connecting ring; 109. Fixed ring; 110. Buffer spring; 111. Sealing pad;

[0026] 2. Movable assembly; 201. Sliding column; 202. External thread; 203. Threaded sleeve; 204. Gasket;

[0027] 3. First mounting assembly; 301. U-shaped mounting plate; 302. Reinforcing ribs;

[0028] 4. Second mounting assembly; 401. Bottom plate; 402. Fixing plate; 403. Rotating shaft; 404. Bolt;

[0029] 5. High-voltage circuit breaker body; 501. Shell; 502. Spring mechanism; 503. Rotating plate. DETAILED DESCRIPTION

[0030] The embodiment of the utility model provides a buffer device for a pneumatic closing and opening switch structure.

[0031] Please refer to Figure 1 , Figure 2 and Figure 4A buffer device for a pneumatic closing and opening brake structure includes a buffer mechanism 1, which includes an outer cylinder 101, a push rod 102 is fixedly connected to the inner top wall of the outer cylinder 101, a piston 103 is fixedly installed at the lower end of the push rod 102, an inner cylinder 104 whose inner wall is in sliding contact with the circumferential side of the piston 103 is slidably connected to the inner wall of the outer cylinder 101, a compression shell 105 is fixedly connected to the lower end of the inner cylinder 104, and the circumferential side of the compression shell 105 is provided with evenly distributed air holes 106, and the top surface of the outer cylinder 101 and the bottom surface of the compression shell 105 are respectively fixedly connected with an upper connecting ring 107 and a lower connecting ring 108.

[0032] When the high-voltage circuit breaker body 5 is closed, the spring mechanism 502 needs to be energy stored first. The energy-stored spring mechanism 502 can drive the U-shaped mounting plate 301 to reset along with the rotating plate 503. Driven by the rotating plate 503, the U-shaped mounting plate 301 will cause the upper connecting ring 107 to rotate on the sliding column 201. At the same time, the upper connecting ring 107 drives the outer cylinder 101, the push rod 102 and the piston 103 to compress the air inside the inner cylinder 104 and the compression shell 105. As the outer cylinder 101, the push rod 102 and the piston 103 continue to move, the air inside the inner cylinder 104 and the compression shell 105 continues to be compressed, and the buffering effect becomes stronger and stronger, thereby ensuring that the internal components of the high-voltage circuit breaker are not damaged.

[0033] Please refer to 1. The buffer mechanism 1 also includes a fixing ring 109 fixedly connected to the circumferential side of the outer cylinder 101 and the inner cylinder 104. A buffer spring 110 is fixedly installed on the side of the two fixing rings 109 close to each other. A sealing gasket 111 is fixedly connected to the top surface of the piston 103. The sealing gasket 111 is sleeved on the circumferential side of the push rod 102. When the spring mechanism 502 is storing energy, the fixing ring 109 fixed on the outer cylinder 101 will be driven away from the U-shaped mounting plate 301. The fixing ring 109 fixed on the inner cylinder 104 causes the buffer spring 110 to return to normal. When the switch is closed, the energy-storing spring mechanism 502 will drive the fixing ring 109 fixed on the outer cylinder 101 to cooperate with the fixing ring 109 fixed on the inner cylinder 104 to compress the buffer spring 110 through the U-shaped mounting plate 301, the sliding column 201, the upper connecting ring 107, and the outer cylinder 101. The deformation of the buffer spring 110 is used for buffering, thereby further improving the buffering effect.

[0034] Please refer to Figure 1The upper end of the buffer mechanism 1 is connected to a first mounting assembly 3 for mounting the upper end of the buffer mechanism 1 through a movable assembly 2. The first mounting assembly 3 includes a U-shaped mounting plate 301. A reinforcing rib 302 is fixedly connected to the U-shaped mounting plate 301. A mounting hole is provided on one side of the U-shaped mounting plate 301. When the spring mechanism 502 is storing energy, the U-shaped mounting plate 301 will rotate driven by the rotating plate 503. After the lower end of the rotating plate 503 rotates half a circle, the energy storage of the spring mechanism 502 is completed. Further, the U-shaped mounting plate 301 will pull the upper connecting ring 107, the outer cylinder 101, the push rod 102 and the piston 103 through the sliding column 201 to move in a direction away from the inner cylinder 104, and the inner cylinder 104 will also rotate on the rotating shaft 403 through the lower connecting ring 108.

[0035] Please refer to Figure 3 The movable component 2 includes a sliding column 201 fixedly connected to one side of the U-shaped mounting plate 301, and an external thread 202 is provided on the circumferential side of the sliding column 201. The sliding column 201 is threadedly connected with a threaded sleeve 203 through the external thread 202. The upper connecting ring 107 is sleeved on the sliding column 201, and a gasket 204 is sleeved on the side of the threaded sleeve 203 close to the upper connecting ring 107. The upper connecting ring 107 can be limited by the coordinated setting of the threaded sleeve 203 and the external thread 202 to prevent the upper connecting ring 107 from falling off. At the same time, it is easy to disassemble and assemble when the device needs to be repaired or replaced. The sliding column 201 can make the outer cylinder 101 rotate on the U-shaped mounting plate 301.

[0036] Please refer to Figure 5 The lower end of the buffer mechanism 1 is provided with a second mounting assembly 4 for mounting the lower end of the buffer mechanism 1. The second mounting assembly 4 includes a base plate 401. Two fixing plates 402 are fixedly connected to the top surface of the base plate 401. A rotating shaft 403 is fixedly connected between the two fixing plates 402. The circumferential side surface of the rotating shaft 403 is rotatably connected to the reserved hole of the lower connecting ring 108. Bolts 404 are provided at the four corners of the base plate 401. The matching arrangement of the base plate 401 and the bolts 404 facilitates the fixing of the device in the housing 501 of the high-voltage circuit breaker body 5, and facilitates disassembly and assembly when the device needs to be repaired or replaced.

[0037] Working principle: When the high-voltage circuit breaker body 5 is closed, the spring mechanism 502 is firstly stored with a tool, and the spring mechanism 502 after the storage of energy can drive the U-shaped mounting plate 301 to reset together with the rotating plate 503. At this time, the U-shaped mounting plate 301, driven by the rotating plate 503, will make the upper connecting ring 107 rotate on the sliding column 201. At the same time, the upper connecting ring 107 drives the outer cylinder 101, the push rod 102 and the piston 103 to compress the air inside the inner cylinder 104 and the compression shell 105. As the outer cylinder 101, the push rod 102 and the piston 103 continue to move, the air inside the inner cylinder 104 and the compression shell 105 continues to be compressed, and the buffering effect becomes stronger and stronger, thereby ensuring that the internal components of the high-voltage circuit breaker are not damaged.

[0038] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A buffer device for a pneumatic closing and opening switch structure, comprising a buffer mechanism (1), Features: The upper end of the buffer mechanism (1) is connected to a first mounting assembly (3) for mounting the upper end of the buffer mechanism (1) via a movable assembly (2), and the lower end of the buffer mechanism (1) is provided with a second mounting assembly (4) for mounting the lower end of the buffer mechanism (1); The buffer mechanism (1) comprises an outer cylinder (101), the inner top wall of the outer cylinder (101) is fixedly connected to a push rod (102), the lower end of the push rod (102) is fixedly mounted with a piston (103), the inner wall of the outer cylinder (101) is slidably connected to an inner cylinder (104) whose inner wall is in sliding contact with the circumferential side of the piston (103), the lower end of the inner cylinder (104) is fixedly connected to a compression shell (105), the circumferential side of the compression shell (105) is provided with evenly distributed air holes (106), and the top surface of the outer cylinder (101) and the bottom surface of the compression shell (105) are respectively fixedly connected to an upper connecting ring (107) and a lower connecting ring (108).

2. The buffer device of the pneumatic closing and opening structure according to claim 1, Features: The buffer mechanism (1) further comprises a fixing ring (109) fixedly connected to the circumferential side surfaces of the outer cylinder (101) and the inner cylinder (104), and a buffer spring (110) is fixedly mounted on the side surfaces of the two fixing rings (109) close to each other.

3. The buffer device of the pneumatic closing and opening structure according to claim 1, Features: A sealing gasket (111) is fixedly connected to the top surface of the piston (103), and the sealing gasket (111) is sleeved on the circumferential side surface of the push rod (102).

4. The buffer device of the pneumatic closing and opening structure according to claim 1, Features: The first mounting assembly (3) comprises a U-shaped mounting plate (301), a reinforcing rib (302) being fixedly connected to the U-shaped mounting plate (301), and a mounting hole being provided on one side surface of the U-shaped mounting plate (301).

5. The buffer device of the pneumatic closing and opening structure according to claim 1, Features: The movable component (2) comprises a sliding column (201) fixedly connected to one side of a U-shaped mounting plate (301), the circumferential side of the sliding column (201) is provided with an external thread (202), the sliding column (201) is threadedly connected to a threaded sleeve (203) via the external thread (202), and the upper connecting ring (107) is sleeved on the sliding column (201).

6. The buffer device of the pneumatic closing and opening structure according to claim 5, Features: A gasket (204) is sleeved on a side of the threaded sleeve (203) close to the upper connecting ring (107).

7. The buffer device of the pneumatic closing and opening structure according to claim 1, Features: The second mounting assembly (4) comprises a base plate (401), the top surface of the base plate (401) being fixedly connected to two fixing plates (402), a rotating shaft (403) being fixedly connected between the two fixing plates (402), a circumferential side surface of the rotating shaft (403) being rotatably connected to a reserved hole of a lower connecting ring (108), and bolts (404) are provided at the four corners of the base plate (401).

Images