CN203733730U - Gunpowder-gas-driven circuit breaker superspeed operating mechanism - Google Patents

Abstract

The utility model relates to a gunpowder-gas-driven circuit breaker superspeed operating mechanism. The gunpowder-gas-driven circuit breaker superspeed operating mechanism comprises a transmission element for transmitting a driving force to a corresponding opening and closing mechanism, and blowback blank cartridge firing devices for driving the movement of the transmission element. The transmission element has an opening position and a closing position. Each blowback blank cartridge firing device comprises a cartridge receiver, a rifle bolt, a recoil spring and a firing pin. The rifle bolt has a retreat position for driving the firing pin to be moved to the energy storage position and a go-forward position for pushing the blank cartridge to be loaded under the action of the recoil spring in the moving stroke. The number of the blowback blank cartridge firing devices is two. The two blowback blank cartridge firing devices are arranged on two sides of the transmission element separately in the opening and closing moving direction and provided with a corresponding gun barrel separately. Axes of the two gun barrels are arranged in a parallel manner. End surfaces of two sides of the transmission element which are towards the opening and closing direction are provided with a blind hole for end portions of the two gun barrels which are closed to the transmission element to be inserted in a guided and sealed manner separately. The gunpowder-gas-driven circuit breaker superspeed operating mechanism can be used to realize circuit breaker fast opening and fast closing.

Description

An ultra-high-speed operating mechanism for a propellant gas-driven circuit breaker

technical field

The utility model relates to an ultra-high-speed operating mechanism of a gunpowder gas-driven circuit breaker.

Background technique

Some high-voltage circuit breakers will generate a large current when they are broken, so they have clear requirements for the breaking time. For example, in a DC power grid with a voltage level of 320kV, the rising speed of the DC side current is 3.5kA/ms when a short circuit occurs. Assuming that the current value on the line is 2kA during normal operation, the short-circuit current on the line can reach 9kA after 2ms, that is, a high-voltage DC circuit breaker capable of breaking 9kA current must be able to quickly act within 2ms to cut off the current. However, the opening speed of the existing spring operating mechanism and hydraulic operating mechanism cannot realize breaking the circuit breaker in such a short time; while the speed of the magnetic mechanism can meet the requirements of double-break or multi-break circuit breakers, but it is difficult to manufacture. Very high; repulsion mechanism, the speed barely meets the requirement, theoretically it can reach 60m/s, but there is a problem of short stroke.

The Chinese patent with the application number 94246009.X and the authorized announcement date of 1995-09-06 discloses a launch type operating mechanism, which includes a transmission member for transmitting driving force to the corresponding opening and closing mechanism, and the transmission member It has an opening position and a closing position corresponding to the opening and closing mechanism. The bottom end of the transmission part is in the form of a piston and is slid and sealed in the corresponding piston cylinder, which can guide the movement in the piston cylinder. The bottom of the piston cylinder is equipped with a The air inlet connected to the piston cavity. The launch-type operating mechanism also includes a recoil type blank projectile launcher communicated with the air inlet for injecting high-pressure gas into the piston cavity. The gunlock, gunlock, recoil spring, the chamber for installing blank bullets, the firing pin for firing blank bullets, the firing mechanism for firing the firing pin and the bomb feeding mechanism, etc., the gunlock has Under the action of external force, it overcomes the force of the recoil spring to drive the striker to move to the receding position of the energy storage position and the forward position for pushing the empty cartridge into the chamber under the action of the recoil spring. Its principle is the same as that of the existing bolt recoil type. The principle of automatic firearms is the same. After the blank bullet is loaded, the firing mechanism releases the firing pin. The bolt is retracted downwards. During this process, the bolt compresses the recoil spring, and relies on the corresponding ejection mechanism to eject the empty cartridge case. The firing pin moves to the ready-to-fire position and is in the ready-to-fire state under the blocking of the firing mechanism. The gas flows from the After the barrel is discharged, the bolt will return under the action of the recoil spring, and cooperate with the bomb feeding mechanism to load the next empty cartridge. However, the above-mentioned launching type operating mechanism can only realize quick closing, but cannot realize quick opening. In addition, since the gunpowder burns, residues will be generated, and the transmission parts are sliding and sealed in the piston cylinder with a closed structure, and the end of the piston cylinder is fixed with a recoil type blank bomb launcher, so it is inconvenient to disassemble, and the accumulated residues are easy to make the transmission The parts are stuck, which will affect the speed of the transmission parts, and even cause the transmission parts to fail to operate normally. The reliability of the system is poor and the maintenance is inconvenient.

Utility model content

The purpose of the utility model is to provide an ultra-high-speed operating mechanism of a gunpowder gas-driven circuit breaker capable of realizing fast opening and closing of the circuit breaker.

The technical scheme adopted by the utility model is: a super-high-speed operating mechanism of a propellant gas-driven circuit breaker, including a transmission part used to transmit the driving force to the corresponding opening and closing mechanism, and a recoil type blank bomb for driving the movement of the transmission part. Launching device, the transmission member has an opening position and a closing position, and the recoil type blank bullet launching device includes a casing, a bolt arranged in the casing, a recoil spring and a striker, and the bolt moves when it moves The stroke has a receding position that drives the striker to move to the energy storage position and a forward position for pushing the blank shell into the chamber under the action of the recoil spring. The recoil type blank shell launching device is provided with two, two recoil empty shell The bullet launching devices are respectively arranged on both sides of the transmission part in the opening and closing movement direction and are respectively provided with corresponding gun barrels. The end guide seal is inserted into the blind hole.

Each of the blind holes has a bottom wall of the blind hole for pressure sealing of the opening edge of the gun barrel on the corresponding side when the transmission member moves to the closing position or the opening position.

The hole wall of the blind hole is provided with a vent hole for connecting the inside of the blind hole with the outside atmosphere.

The axes of the two gun barrels are on the same straight line.

The blind hole is a stepped hole whose mouth diameter is smaller than that of the bottom hole.

The gun barrel is provided with an air-tight ring for guiding and sealing cooperation with the inner wall of the smaller portion of the mouth of the blind hole.

The recoil type blank bullet launcher is a recoil short barrel blank bullet launcher.

The casing is provided with a buffer ring corresponding to the end face of the transmission member for slowing down the collision of the transmission member.

The utility model adopts the above-mentioned technical scheme, because the said recoil type blank bomb launching device is provided with two, and the two recoil type blank bomb launching devices are respectively arranged on both sides of the opening and closing movement direction of the transmission part and are respectively provided with corresponding Gun barrel, the end faces of the two sides of the transmission member towards the opening and closing direction are respectively provided with blind holes for the end guide seal insertion of the two gun barrels close to the transmission member. Therefore, compared with the prior art, the transmission member can Relying on the corresponding recoil-type blank projectile launcher to move from the closing position to the opening position, or from the opening position to the closing position, so as to realize rapid opening and closing by relying on the propellant gas drive. the

Description of drawings

Figure 1: A schematic diagram of the ejection state of the recoil-type blank projectile launching device on the right side of an embodiment of the ultra-high-speed operating mechanism of a propellant gas-driven circuit breaker of the utility model;

Figure 2: A schematic diagram of the ready-to-fire state of the recoil-type blank projectile launcher on the right side of the operating mechanism in Figure 1.

The names corresponding to the reference signs in the figure are: 1 receiver, 2 recoil spring, 3 transmission, 4 bolt, 5 firing pin, 6 firing pin spring, 7 firing device, 8 gas-closing ring, 9 barrel, 10 empty bag Bullets, 11 magazines, 12 blind holes, 121 blind hole bottom walls, 13 buffer rings, 14 vent holes.

Detailed ways

An embodiment of the ultra-high-speed operating mechanism of the gunpowder gas-driven circuit breaker of the utility model is shown in Figures 1 to 2, which is used for a 200KV single-fracture DC circuit breaker, including a transmission member that is guided and moved along the left and right directions of the opening and closing movement 3. Recoil-type blank projectile launching devices arranged on the left and right sides of the transmission member 3.

The structures of the two recoil-type blank shell launching devices are identical, and both adopt the short recoil structure of the gun barrel, which can realize loading, percussion and ejection of the blank shell 10. The short-recoil structure of the barrel is the tube-back structure in the automatic principle of firearms. It uses the recoil energy of the barrel to work. The prime mover is the barrel and the bolt, and the prime mover is the gunpowder gas pressure acting on the bottom of the barrel. This can be realized by those skilled in the art without creative effort. Each recoil-type empty shell launcher includes a casing 1, ammunition supplies, a gun barrel 9 that is arranged on the front end of the casing 1 and forms an injection port, and the injection ports of each barrel 9 are all towards the transmission member 3. Wherein, the magazine 11 is used as the ammunition supply tool, and of course, in other embodiments, an ammunition belt or a magazine drum etc. can also be used. The axes of the two gun barrels 9 are on the same straight line, and the casing 1 is provided with a bolt 4 guided and moved in the left and right directions, and a recoil spring 2 pressed against the bolt 4, and the bolt 4 is on its movement stroke. It has a retreat position that drives the striker 5 to move to the energy storage position under the action of an external force, and also has a forward position that pushes the empty cartridge 10 to be loaded under the action of the recoil spring 2 . The bolt 4 is provided with striker through holes penetrating left and right for the corresponding striker 5 to pass through. The casing 1 is also provided with a firing pin spring 6 and a firing device 7 that stores energy or releases the firing pin 5 to fire the empty shell 10 by stopping and limiting the firing pin 5. The firing device 7 can be mechanically fired or electromagnetically fired according to the actual situation. , What adopted in the present embodiment is electromagnetic percussion, is convenient to realize electric control. The casing 1 is also provided with a buffer ring 13 in the form of a gasket corresponding to the corresponding end face of the transmission part 3, which is used to buffer the collision between the transmission part 3 and the casing 1, so as to prevent the short recoil effect of the gun barrel from being affected.

Blind holes 12 are respectively provided on the left and right end faces of the transmission member 3 and the two recoil-type blank projectile launching devices. The blind holes 12 are stepped holes with a mouth aperture smaller than the bottom aperture, including a residue collection section with a larger bottom aperture and a top aperture. Smaller guide segments. The axes of the two blind holes 12 are also on the same straight line, and coincide with the axes of each gun barrel 9. The front ends of each gun barrel 9 are all sleeved with an air-tight ring 8 that is used to guide and seal the inner wall of the guide section of the blind hole 12. On the one hand, the air-tight ring 8 can prevent the gunpowder gas from leaking from the joint between the gun barrel 9 and the transmission part 3, so as to realize airtight sealing; on the other hand, it can ensure the coaxiality of the blind hole 12 in the gun barrel 9 and the transmission part 3 , to minimize eccentricity and achieve better guidance. The two blind holes 12 respectively have blind hole bottom walls 121 for sealing the mouth of the corresponding side gun barrel 9 along the top pressure, so as to ensure the rapid action of the transmission member 3 after the empty cartridge 10 is fired. A space for collecting gunpowder residue can be formed between the inner wall of the residue collecting section of the blind hole 12 and the corresponding outer peripheral surface of the gun barrel 9 , so as to prevent the gun barrel 9 from being stuck due to the influence of gunpowder residue in the transmission member 3 . The cavity wall of the residue collection section is connected with a vent hole 14 for communicating with the outside atmosphere. The hole diameter is a set value, which can ensure that the gunpowder gas will not be released quickly to form a high pressure in the blind hole 12 to meet the requirements of the transmission parts. action requirements, and can ensure that the powder gas is discharged after the transmission member completes a movement stroke, so that the pressure in the blind hole 12 is consistent with the external atmosphere, so as to meet the needs of the next reverse movement. In addition, since the barrel is guided and sealed in the blind hole provided on the corresponding side end surface of the transmission part, it can be easily separated from the transmission part, which facilitates the cleaning of gunpowder gas residues, convenient maintenance and high reliability.

It is defined that the movement of the transmission member 3 to the right is opening, and the movement to the left is closing. When the circuit breaker is in the opening position and needs to be closed, first pull the bolt 4 on the right side from the forward position to the backward position, so that the striker 5 on this side overcomes the elastic force of the striker spring 6 to move to the energy storage position and is fired by the firing device 7 Stop the limit position and be in the state of being fired, then release the bolt 4, so that the bolt 4 moves to the forward position under the action of the recoil spring 2 and loads the blank bullet 10 entering the casing 1, as shown in Figure 2 Show. When the switch is closed, an electric signal is sent to the firing device 7 on the right side, and the firing device 7 moves to release the firing pin 5 on the right side, and the firing pin 5 hits the empty cartridge 10 to ignite the primer and generate a large amount of gunpowder gas, which is ejected from the gun barrel 9 Thereby driving the transmission member 3 to the left to meet the set required speed to move to the closing position to complete the closing action. When the transmission part 3 starts to complete a movement stroke, the gun barrel 9 in the blind hole 12 begins to recoil for a short distance under the drive of the recoil force, thereby pushing the gunlock 4 on the right side of the transmission part 3 to move from the forward position to the retreat position, The action of the corresponding pulling hook pulls out the fired empty cartridge case and throws it out of the casing 1, and pushes the firing pin 5 back to the energy storage position at the same time. Wherein the shell hook is a known mechanism in the prior art, which can be realized by those skilled in the art without creative work, and is not shown in the figure. At this time, the gunpowder gas in the blind hole 12 and the gun barrel 9 has been discharged from the vent hole 14, the internal pressure returns to normal pressure, and the bolt 4 on the right moves to the backward position and then moves towards the forward position under the action of the recoil spring 2 , and push the empty cartridge 10 for the ammunition into the casing 1 into the barrel 9 to load, waiting for the next firing. Similarly, if the circuit breaker is in the closed state and needs to be opened, the left recoil type empty shell launcher will act, and push the transmission member 3 to the right to meet the set required speed to move to the opening position to complete the opening action, and Load the recoil blank launcher on the left and wait for the next shot.

In the above-mentioned embodiment, the two gun barrels are arranged coaxially, and the recoil-type blank shell launching device adopts the short-recoil structure of the gun barrel. In other embodiments, the two gun barrels 9 can also be arranged in parallel and at intervals, and the two blind holes 12 on the transmission member can also be arranged in parallel and at intervals correspondingly; Structure, the long recoil structure of the gun barrel is also a common structure of automatic firearms in the prior art, and it can be realized by those skilled in the art without paying creative labor, and the specific structure is no longer described in detail here. In addition, the blind hole 12 on the transmission member 3 in the above-mentioned embodiment has a blind hole bottom wall 121 for sealing the mouth edge of the gun barrel 9 nozzle, and the blind hole 12 is provided with a residue collection section. In other embodiments, The bottom wall of the blind hole 121 can also be separated from the mouth of the gun barrel 9 by a set gap, and the residue collection section is an optional structure, which can also be omitted or replaced in other forms in other embodiments, such as on the side wall of the blind hole 12 The lower part of the tank is provided with a groove as a residue holding tank. Furthermore, the transmission member 3 may not be provided with the vent hole 14, and the residual gunpowder gas can be discharged from the opening on the rear side of the gun chamber after the opening and closing action is completed, such as the operating mechanism in the background technology.

Claims (8)

1. An ultra-high-speed operating mechanism of a gunpowder gas-driven circuit breaker, including a transmission part for transmitting a driving force to the corresponding opening and closing mechanism, and a recoil type blank projectile launcher for driving the transmission part to move, the transmission part It has an opening position and a closing position. The recoil-type blank bomb launcher includes a casing, a bolt arranged in the casing, a recoil spring and a firing pin. The bolt has the ability to drive the firing pin to move to The receding position of the energy storage position and the forward position used to push the blank shell into the chamber under the action of the recoil spring are characterized in that: the recoil type blank shell launching device is provided with two, two recoil type blank shell launchers The devices are respectively arranged on both sides of the transmission part in the opening and closing movement direction and are respectively provided with corresponding gun barrels. Guided blind hole for seal insertion. 2. The ultra-high-speed operating mechanism of a propellant gas-driven circuit breaker according to claim 1, wherein each of the blind holes has a power supply when the transmission member moves to the closing position or the opening position. The mouth of the corresponding side gun barrel nozzle is along the blind hole bottom wall of the top pressure seal. 3. The ultra-high-speed operating mechanism of a propellant gas-driven circuit breaker according to claim 1, characterized in that: the hole wall of the blind hole is provided with a vent hole for connecting the inside of the blind hole with the outside atmosphere. 4. The ultra-high-speed operating mechanism of a propellant gas-driven circuit breaker according to claim 1, 2 or 3, wherein the axes of the two gun barrels are on the same straight line. 5. An ultra-high-speed operating mechanism for a propellant gas-driven circuit breaker according to claim 1, 2 or 3, wherein the blind hole is a stepped hole with a diameter at the mouth smaller than that at the bottom. 6. An ultra-high-speed operating mechanism for a propellant gas-driven circuit breaker according to claim 5, characterized in that: the gun barrel is provided with a guiding seal for cooperating with the inner wall of the smaller aperture of the blind hole. A closed air ring. 7. An ultra-high-speed operating mechanism for a propellant gas-driven circuit breaker according to claim 1, 2 or 3, characterized in that: the recoil-type blank projectile launching device is a short-barreled recoil-type blank projectile launcher device. 8. An ultra-high-speed operating mechanism for a propellant gas-driven circuit breaker according to claim 7, characterized in that: the casing is provided with an end face corresponding to the transmission part for slowing down the transmission part. The collision buffer ring.