阅读说明：本技术 蓄能击打装置及机械式远程打闸系统 (Energy storage striking device and mechanical remote brake system ) 是由 刘闯铭 邢兴龙 杨忠 司晓贞 王禹 于 2021-08-03 设计创作，主要内容包括：本发明公开了一种蓄能击打装置及机械式远程打闸系统,蓄能击打装置包括支座、击打杆、拉杆、蓄力弹簧、闭锁机构以及释放机构；击打杆具有相对的击打端和连接端,击打杆穿设在支座内并可在轴向上来回移动,击打端的端部位于支座朝向打闸手柄的外侧；蓄力弹簧套设在击打杆上；拉杆与击打杆的连接端轴向相接并伸出支座背向打闸手柄的外侧,用于拉动击打杆轴向移动,压缩蓄力弹簧；闭锁机构设置在支座内并位于连接端的一侧,释放机构连接闭锁机构。本发明以弹簧蓄力的方式驱使击打杆对汽轮泵上的打闸手柄进行击打,不依靠外部能源,机械式触发可靠性高,避免受环境及工况的影响；远程打闸,减少汽动泵超速试验直接参与人员,提高设备故障反应速度。(The invention discloses an energy storage striking device and a mechanical remote brake system, wherein the energy storage striking device comprises a support, a striking rod, a pull rod, a force storage spring, a locking mechanism and a releasing mechanism; the striking rod is provided with a striking end and a connecting end which are opposite, the striking rod penetrates through the support and can move back and forth in the axial direction, and the end part of the striking end is positioned on the outer side of the support, which faces the brake handle; the power storage spring is sleeved on the striking rod; the pull rod is axially connected with the connecting end of the striking rod and extends out of the support to the outer side of the brake-striking handle, so that the pull rod is pulled to axially move and compress the force-storing spring; the locking mechanism is arranged in the support and located on one side of the connecting end, and the release mechanism is connected with the locking mechanism. The invention drives the striking rod to strike the brake-striking handle on the turbine pump in a spring force-accumulating mode, does not depend on external energy, has high mechanical triggering reliability and avoids the influence of environment and working conditions; and the brake is opened remotely, so that direct participation of a pneumatic pump overspeed test is reduced, and the equipment fault response speed is increased.)

1. An energy storage striking device is used for striking a brake handle on a pneumatic pump and is characterized by comprising a support, a striking rod, a pull rod, a force storage spring, a locking mechanism and a releasing mechanism;

the striking rod is provided with a striking end and a connecting end which are opposite, the striking rod penetrates through the support and can move back and forth in the axial direction, and the end part of the striking end is positioned on the outer side of the support, which faces the brake handle; the power storage spring is sleeved on the striking rod; the pull rod is axially connected with the connecting end of the striking rod and extends out of the support to the outer side of the brake handle in a back direction, and the pull rod is used for pulling the striking rod to axially move and compressing the force storage spring; the locking mechanism is arranged in the support and positioned on one side of the connecting end, and the release mechanism is connected with the locking mechanism;

when the energy storage striking device is in a force storage state, the force storage spring is compressed, the striking end is located in the support, and the locking mechanism interferes with the connecting end to limit the axial movement of the striking rod;

when the energy storage striking device is in a striking state, the locking mechanism is pulled by the release mechanism to stagger the limit of the connecting end, the force storage spring is extended and restored, and the striking end extends out of the support.

2. The energy storing impact device of claim 1, wherein the support includes a base plate, first and second end plates connected upright on opposite sides of the base plate, a pressure plate connected upright on the base plate and located between the first and second end plates;

the utility model discloses a structure of striking the end of a motor, including first end plate and clamp plate, but be equipped with the supported hole of relative intercommunication on first end plate and the clamp plate, but the striking rod axial displacement wears to establish two between the supported hole, the end of beating of striking rod is located between first end plate and the clamp plate, the tip of beating the end is located first end plate dorsad one side of clamp plate, the link of beating the rod is located between clamp plate and the second end plate.

3. The energy-storing beating device according to claim 2, wherein the beating rod is provided with a protruding limiting step, the limiting step is opposite to the pressing plate at a spacing, and two ends of the energy-storing spring are respectively abutted against the limiting step and the pressing plate.

4. An energy storing impact device according to claim 3 wherein said support further comprises two side plates attached to opposite sides of said base plate;

at least one side plate is provided with a guide groove parallel to the axial direction of the striking rod, the limiting step is provided with a convex column, and the convex column is matched in the guide groove and can move back and forth along the length direction of the guide groove.

5. The energy storing impact device of claim 2, wherein the second end plate is provided with a through hole, and the pull rod is axially movably disposed through the through hole;

one end of the pull rod is positioned in the support and connected with the connecting end, and the other opposite end of the pull rod is positioned on one side of the second end plate, which is back to the pressing plate.

6. An energy storing percussion apparatus according to claim 5, wherein the end of the tension rod outside the support is provided with a pull ring or handle.

7. The energy storing impact device of claim 2, wherein the locking mechanism comprises a fixed seat connected to the second end plate, a latch member disposed on the fixed seat and rotatable relative to the fixed seat;

the connecting end is provided with a barb matched with the lock groove on the lock catch piece;

when the energy storage striking device is in a force storage state, the barb is matched in the locking groove;

when the energy storage striking device is in a striking state, the barb is separated from the locking groove.

8. The energy storing impact device of claim 7, wherein the locking member has an engaging portion projecting toward the pull rod, the engaging portion having a U-shaped slot, the pull rod passing axially through the U-shaped slot.

9. The energy storing striking device of claim 7, wherein said release mechanism comprises a release lever rotatable relative to said support;

one end of the release lever is positioned in the support and connected with the locking piece, and the other opposite end is positioned below the bottom plate of the support.

10. The energy storing impact device of claim 9, wherein the latching mechanism further comprises a shock resistant member disposed on the anchor block and rotatable relative to the anchor block; the anti-vibration piece is matched at one side of the lock catch piece and is positioned in the rotating direction of the lock catch piece;

a clamping groove is formed in one side, facing the anti-seismic piece, of the release lever, and the anti-seismic piece is provided with an extension pin which is detachably matched in the clamping groove;

when the energy storage striking device is in a force storage state, the extension foot is matched in the clamping groove;

when the energy storage striking device is in a striking state, the extension foot is separated from the clamping groove.

11. An energy storing percussion apparatus according to claim 9, wherein the release mechanism further comprises a safety latch; the release lever is provided with a safety jack, and one end of the safety bolt passes through the second end plate and is inserted into the safety jack.

12. The energy storing impact device of claim 9, wherein the release mechanism further comprises a spring; one end of the elastic sheet is fixed on the second end plate, and the other end of the elastic sheet is elastically abutted to the release lever.

13. The energy storing impact device of claim 9, wherein the release mechanism further comprises a brake assembly disposed below the sole plate;

the brake assembly comprises a brake cable which is connected below the bottom plate through a hanging plate and can move back and forth in the axial direction relative to the bottom plate, and the brake cable penetrates through the release rod and is fixed relative to the release rod.

14. An energy storing percussion apparatus according to claim 13, wherein the brake assembly further comprises a return spring; the brake cable is provided with a clamp, the reset spring is sleeved on the brake cable, and the two opposite ends of the reset spring are respectively abutted against the clamp and the hanging plate.

15. An energy storing percussion device according to any one of claims 1 to 14, wherein the end of the percussion end is provided with a cushion.

16. A mechanical remote brake opening system, which is characterized by comprising an energy-storage striking device according to any one of claims 1 to 15, a mounting bracket mounted on a pump body of a turbine pump, and an attraction transmission line;

the energy storage striking device is fixed on the mounting bracket and is right opposite to a brake-striking handle on the pump body; the gravity transmission line is connected with a release mechanism of the energy storage striking device and used for pulling the release mechanism.

17. The mechanical remote braking system according to claim 16, further comprising a foot pedal mechanism;

the free end of the gravity transmission line, which is far away from the release mechanism, is connected to the pedal mechanism.

Technical Field

The invention relates to the technical field of nuclear power equipment, in particular to an energy storage striking device and a mechanical remote brake system.

Background

The normal operation rotating speed of the steam-driven auxiliary water-feeding pump of the nuclear power station is 8000r/min, the pump is provided with two overspeed protection devices, the first-stage overspeed protection is electromagnetic overspeed protection, and the action rotating speed range is set to be 9250 and 9420 r/min; the second-stage overspeed protection is mechanical overspeed protection, and the set action rotating speed range is 9675-9850 r/min.

According to the requirements of the nuclear power plant operation supervision outline, a steam-driven auxiliary water feeding pump (a steam-driven pump for short) needs to execute an electromagnetic and mechanical overspeed protection test every time of overhaul. The electromagnetic overspeed protection system needs to be shut down when performing the mechanical overspeed protection test. In addition, in order to avoid the condition that the mechanical overspeed protection system abnormally causes the runaway of the pneumatic pump, a specially-assigned person needs to wear protective articles such as heat insulation gloves, splash-proof face screens and earplugs to be responsible for manual brake-opening operation during a test, and when the rotating speed of the pneumatic pump exceeds 9850r/min, the mechanical overspeed protection is not operated, and then the manual brake-opening operation is carried out.

Because the rotating speed of the pneumatic pump is very high when the overspeed test is carried out, the site noise is high, steam is continuously sprayed at the manual brake-opening handle, the psychological pressure of manual brake-opening operators is high, the industrial safety risk is high, and the manual brake-opening operators are difficult to communicate with other testers. When the rotating speed exceeds 9850r/min, manual brake opening can be untimely; if the accident happens, the person is not in time to escape. Therefore, the existing protection test mode of the steam-driven pump has the following problems:

(1) when the pneumatic pump is overspeed, the rotating speed is very high, and the runaway risk exists;

(2) the pump room is narrow, and people are difficult to escape;

(3) when the speed is over high, the steam pump runs at ultra high speed, the temperature of the pump body is high, and steam (above 200 ℃) can be sprayed out when a brake is opened, so that the risk of hurting people is caused;

(4) the noise is very large (about 100-;

(5) the manual pushing of the brake handle by personnel is slow in response and untimely in action; if the overspeed brake is not opened in time, equipment damage risks exist; sometimes, the brake handle needs larger brake force, and the condition that the brake cannot be knocked off for the first time exists in the working personnel.

Disclosure of Invention

The invention aims to provide an energy storage striking device for mechanically striking a pneumatic pump and a mechanical remote brake striking system with the energy storage striking device.

The technical scheme adopted by the invention for solving the technical problems is as follows: the energy storage striking device is used for striking a brake handle on a pneumatic pump and comprises a support, a striking rod, a pull rod, a force storage spring, a locking mechanism and a releasing mechanism;

the striking rod is provided with a striking end and a connecting end which are opposite, the striking rod penetrates through the support and can move back and forth in the axial direction, and the end part of the striking end is positioned on the outer side of the support, which faces the brake handle; the power storage spring is sleeved on the striking rod; the pull rod is axially connected with the connecting end of the striking rod and extends out of the support to the outer side of the brake handle in a back direction, and the pull rod is used for pulling the striking rod to axially move and compressing the force storage spring; the locking mechanism is arranged in the support and positioned on one side of the connecting end, and the release mechanism is connected with the locking mechanism;

when the energy storage striking device is in a force storage state, the force storage spring is compressed, the striking end is located in the support, and the locking mechanism interferes with the connecting end to limit the axial movement of the striking rod;

when the energy storage striking device is in a striking state, the locking mechanism is pulled by the release mechanism to stagger the limit of the connecting end, the force storage spring is extended and restored, and the striking end extends out of the support.

Preferably, the support comprises a bottom plate, a first end plate and a second end plate which are vertically connected to two opposite sides of the bottom plate, and a pressure plate which is vertically connected to the bottom plate and is positioned between the first end plate and the second end plate;

the utility model discloses a structure of striking the end of a motor, including first end plate and clamp plate, but be equipped with the supported hole of relative intercommunication on first end plate and the clamp plate, but the striking rod axial displacement wears to establish two between the supported hole, the end of beating of striking rod is located between first end plate and the clamp plate, the tip of beating the end is located first end plate dorsad one side of clamp plate, the link of beating the rod is located between clamp plate and the second end plate.

Preferably, the striking rod is provided with a convex limiting step, the limiting step is opposite to the pressing plate at intervals, and two ends of the power storage spring are respectively abutted against the limiting step and the pressing plate.

Preferably, the support further comprises two side plates connected to the other opposite sides of the bottom plate;

at least one side plate is provided with a guide groove parallel to the axial direction of the striking rod, the limiting step is provided with a convex column, and the convex column is matched in the guide groove and can move back and forth along the length direction of the guide groove.

Preferably, a through hole is formed in the second end plate, and the pull rod can axially move to penetrate through the through hole;

one end of the pull rod is positioned in the support and connected with the connecting end, and the other opposite end of the pull rod is positioned on one side of the second end plate, which is back to the pressing plate.

Preferably, one end of the pull rod, which is positioned outside the support, is provided with a pull ring or a handle.

Preferably, the locking mechanism comprises a fixed seat connected with the second end plate, and a locking piece arranged on the fixed seat and rotatable relative to the fixed seat;

the connecting end is provided with a barb matched with the lock groove on the lock catch piece;

when the energy storage striking device is in a force storage state, the barb is matched in the locking groove;

when the energy storage striking device is in a striking state, the barb is separated from the locking groove.

Preferably, the locking fastener is provided with a matching part protruding towards the pull rod, the matching part is provided with a U-shaped groove, and the pull rod axially penetrates through the U-shaped groove.

Preferably, the release mechanism comprises a release lever rotatable relative to the support;

one end of the release lever is positioned in the support and connected with the locking piece, and the other opposite end is positioned below the bottom plate of the support.

Preferably, the locking mechanism further comprises a shock-proof member which is arranged on the fixed seat and can rotate relative to the fixed seat; the anti-vibration piece is matched at one side of the lock catch piece and is positioned in the rotating direction of the lock catch piece;

a clamping groove is formed in one side, facing the anti-seismic piece, of the release lever, and the anti-seismic piece is provided with an extension pin which is detachably matched in the clamping groove;

when the energy storage striking device is in a force storage state, the extension foot is matched in the clamping groove;

when the energy storage striking device is in a striking state, the extension foot is separated from the clamping groove.

Preferably, the release mechanism further comprises a safety latch; the release lever is provided with a safety jack, and one end of the safety bolt passes through the second end plate and is inserted into the safety jack.

Preferably, the release mechanism further comprises a spring; one end of the elastic sheet is fixed on the second end plate, and the other end of the elastic sheet is elastically abutted to the release lever.

Preferably, the release mechanism further comprises a brake assembly disposed below the base plate;

the brake assembly comprises a brake cable which is connected below the bottom plate through a hanging plate and can move back and forth in the axial direction relative to the bottom plate, and the brake cable penetrates through the release rod and is fixed relative to the release rod.

Preferably, the brake assembly further comprises a return spring; the brake cable is provided with a clamp, the reset spring is sleeved on the brake cable, and the two opposite ends of the reset spring are respectively abutted against the clamp and the hanging plate.

Preferably, the end of the striking end is provided with a cushion pad.

The invention also provides a mechanical remote brake-opening system, which comprises the energy-storage striking device, a mounting bracket arranged on a pump body of the turbine pump and an attractive force transmission line, wherein the energy-storage striking device is arranged on the pump body;

the energy storage striking device is fixed on the mounting bracket and is right opposite to a brake-striking handle on the pump body; the gravity transmission line is connected with a release mechanism of the energy storage striking device and used for pulling the release mechanism.

Preferably, the mechanical remote brake opening system further comprises a pedal mechanism;

the free end of the gravity transmission line, which is far away from the release mechanism, is connected to the pedal mechanism.

According to the energy storage striking device, the striking rod is driven to strike the brake striking handle on the turbine pump in a spring force storage mode, external energy sources are not relied on, the mechanical triggering reliability is high, and the impact of the environment and working conditions is avoided; the remote operation brake opening is realized, direct participation of personnel in the overspeed test of the pneumatic pump is reduced, and the equipment failure response speed is increased.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic structural view of a mechanical remote opening system of the present invention on a pump body;

FIG. 2 is a schematic structural diagram of an energy storing striking device according to an embodiment of the present invention;

FIG. 3 is a top view of the device of FIG. 1;

FIG. 4 is a schematic cross-sectional view of the device of FIG. 2 taken along line A-A;

FIG. 5 is an enlarged schematic view of portion B of FIG. 4;

fig. 6 is a schematic structural view of the locking member of fig. 4.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

The mechanical remote brake opening system is used for remotely opening the brake of the pneumatic pump, and avoids the problems and various safety risks caused by the fact that a worker performs manual brake opening in a short distance.

As shown in fig. 1, the mechanical remote brake-opening system of the present invention may include a mounting bracket 10 mounted on a pump body 1 of a turbine pump, an energy-storing striking device 20 fixed on the mounting bracket 10, and a gravity transmission line (not shown) connected to the energy-storing striking device 20. On the mounting bracket 10, the energy storage striking device 20 is just opposite to the brake striking handle 2 on the pump body 1, and the distance between the energy storage striking device and the brake striking handle is smaller than the striking stroke of the energy storage striking device 20. The length of the gravity transmission line can be determined according to the required remote distance, so that a worker can pull the gravity transmission line at the safe remote distance to start the energy storage striking device 20 to strike the brake handle 2.

For convenience of operation, the mechanical remote brake opening system of the present invention may further include a pedal mechanism (not shown); the free end of the gravity transmission line, which is remote from the energy-accumulating impact device 20, is connected to the pedal mechanism. When striking is required, the worker only needs to press the pedal of the pedal mechanism, so that the gravity transmission line is pulled, and the energy storage striking device 20 is started. The gravity transmission line may be formed of a wire rope or the like.

The mounting bracket 10 may include a flat plate 11 and a vertical plate 12 connected to each other. Be equipped with the several screw hole on the riser 12, this riser 12 with its one end laminating of keeping away from dull and stereotyped 11 on the stabilizer blade side of the pump body 1, screw hole on riser 12 communicates with the screw hole on the stabilizer blade side one-to-one, through bolt locking in the screw hole that is linked together, fixes the installing support on the pump body 1. The energy-storing striking device 20 is fixed on the flat plate 11 by bolts or the like, for example, fixed on the lower surface of the flat plate 11, or fixed on the upper surface of the flat plate 11.

Referring to fig. 1-4, the stored energy striking device 20 may include a support 21, a striking rod 22, a pull rod 23, a power spring 24, a latch mechanism 25, and a release mechanism 26. The striking rod 22 is provided with a striking end 221 and a connecting end 222 which are opposite, the striking rod 22 is arranged in the support 21 in a penetrating mode and can move back and forth in the axial direction, and the end portion of the striking end 221 is located on the outer side, facing the brake handle 2, of the support 21 and is opposite to the brake handle 2; when the striking rod 22 is moved axially to strike, the end of the striking end 221 contacts the brake handle. Power spring 24 is mounted on striking rod 22 and is compressed or extended to return to its original position as striking rod 22 moves axially. The pull rod 23 is axially connected with the connecting end 222 of the striking rod 22 and extends out of the support 21 to the outside of the brake handle 2, so as to pull the striking rod 22 to axially move and compress the power storage spring 24. A locking mechanism 25 is disposed in the support 21 at one side of the connection end 222 for interference with the connection end 222 to limit the position. The release mechanism 26 is connected to the latch mechanism 25 and is used for releasing the limit of the latch mechanism 25 on the connecting end 222. The gravity transmission line is coupled to the release mechanism 26 for pulling the release mechanism 26.

When the energy storage striking device 20 is in a power storage state, the power storage spring 24 is compressed, the striking end 221 is positioned in the support 21, and the locking mechanism 25 interferes with the connecting end 222 to limit the axial movement of the striking rod 22; in this state, the end of the striking end 221 of the striking rod 22 is spaced apart from the brake lever 2 of the pump body 1. When the energy storage striking device 20 is in a firing state, the locking mechanism 25 is pulled by the release mechanism 26 to stagger the limit of the connecting end 222, the power storage spring 24 is extended and restored, the striking end 221 extends out of the support 21, and the striking handle 2 on the pump body 1 is struck through the end.

The end of the striking end 221 is provided with a cushion pad 220 for cushioning. The cushion pad 220 may be made of nylon or the like.

Specifically, as shown in fig. 2-4, in the present embodiment, the support 21 may include a bottom plate 211, a first end plate 212 and a second end plate 213 vertically connected to opposite sides of the bottom plate 211, a pressing plate 214 vertically connected to the bottom plate 211 and located between the first end plate 212 and the second end plate 213, two side plates 215 connected to opposite sides of the bottom plate 211, and a cover plate 216 opposite to the bottom plate 211 and connected to tops of the side plates 215, the first end plate 212, and the second end plate 213, so that the support 21 may be formed into a hollow housing structure. The first end plate 212 and the second end plate 213 serve as front and rear side plates of the mount 21, respectively, with the first end plate 212 facing the brake lever 2 of the pump body 1. The entire support 21 can be fixed to the mounting bracket 10 by the base plate 211 or the cover plate 216.

In order to reduce the overall weight of the support 21, at least one of the bottom plate 211, the side plate 215, and the cover plate 216 may be hollowed out.

In the holder 21, a support hole (not shown) is provided in the first end plate 212 and the pressure plate 214 so as to communicate with each other, and a through hole (not shown) is provided in the second end plate 213. The striking rod 22 is axially movably disposed between the first end plate 212 and the support hole of the pressure plate 214, the striking end 221 of the striking rod 22 is located between the first end plate 212 and the pressure plate 214, the end of the striking end 221 is located on the side of the first end plate 212 facing away from the pressure plate 214, and the connecting end 222 of the striking rod 22 is located between the pressure plate 214 and the second end plate 213. The pull rod 23 is axially movably disposed through the through hole of the second end plate 213, one end of the pull rod 23 is located in the support 21 and connected to the connecting end 222 of the striking rod 22, and the other end is located on a side of the second end plate 213 (located outside the support 21) opposite to the pressure plate 214.

Power spring 24 is mounted on striking rod 22 and abuts the side of pressure plate 214 facing first end plate 212. The striking rod 22 is provided with a protruding limit step 217 corresponding to the power storage spring 24, the limit step 217 is located between the first end plate 212 and the pressing plate 214 and is opposite to the pressing plate 214 at intervals, and two ends of the power storage spring 24 are respectively abutted against the limit step 217 and the pressing plate 214.

When striking rod 22 is pulled by pull rod 23 to move axially, limit step 217 approaches pressure plate 214 with the axial movement of striking rod 22, thereby compressing power spring 24. To facilitate pulling the pull rod 23, a pull ring 231 or a handle is provided at an end of the pull rod 23 located outside the support 21.

Further, at least one side plate 215 is provided with a guide groove 218 parallel to the axial direction of the striking rod 22, and a limit step 217 is provided with a convex column 219, and the convex column 219 is fitted in the guide groove 218 and can move back and forth along the length direction of the guide groove 218. The engagement of post 219 and guide groove 218 provides a guiding and balancing function for the axial movement of striking rod 22 and the extension and retraction of power spring 24.

Preferably, the two side plates 215 are both provided with guide grooves 218, the limit step 217 is provided with two bosses 219, and the two bosses 219 are respectively fitted in the two guide grooves 218.

As shown in fig. 3 to 6, the locking mechanism 25 may include a fixing base 251 connected to the second end plate 213, a locking member 252 disposed on the fixing base 251 and rotatable relative to the fixing base 251, and a shock-proof member 253 disposed on the fixing base 251 and rotatable relative to the fixing base 251. The locking member 252 and the anti-vibration member 253 can be respectively connected in the fixing seat 251 through rotating shafts.

Wherein the fixing seat 251 acts as a support for the entire locking mechanism 25, supporting and positioning the locking mechanism 25 in the seat 21. The locking member 252 has a locking groove 250, and the connecting end 222 of the striking rod 23 is provided with a barb 223 that engages the locking groove 250. When the energy storage striking device 20 is in the energy storage state, the barb 223 is matched in the locking groove 250; when the energy storage striking device 20 is in a firing state, the barb 223 is separated from the lock groove 250.

According to the installation requirement, the locking element 252 may further have a matching portion 2521 protruding toward the pull rod 23, the matching portion 2521 is provided with a U-shaped groove 2522, and the pull rod 23 axially passes through the U-shaped groove 2522.

The anti-vibration member 253 is matched with one side of the locking member 252 and is positioned in the rotating direction of the locking member 252, so that the stability of the locking member 252 is improved, and the influence of the high-speed rotation of the steam turbine pump on the interference of the locking member 252 on the striking rod 23 when the brake is not required to be struck is avoided.

As shown in fig. 2-5, release mechanism 26 may include a release lever 261 that is rotatable relative to support 21. One end of the release lever 261 is located in the holder 21 and connected to the locking member 252, and the opposite end is located below the bottom plate 211 of the holder 21 and connected to the gravity transmission line.

The side of the release lever 261 facing the anti-vibration member 253 is provided with a locking groove 2611, the anti-vibration member 253 is provided with an extension leg 2531 which is detachably matched in the locking groove 2611, and the extension leg 2531 is positioned below the locking member 252. When the energy storage striking device 20 is in the energy storage state, the barb 223 is fitted in the locking groove 250 of the locking member 252, the extension leg 2531 is fitted in the locking groove 2611, the locking member 252 is limited between the anti-vibration member 253 and the release lever 261, and the locking member 252 is limited to rotate downwards (rotate anticlockwise). When the release lever 261 is pulled to rotate, the latch member 252 is driven to simultaneously rotate downwards (rotate anticlockwise), the locking groove 2611 is also separated from the extension leg 2531, the latch member 252 rotates to drive the catching groove 250 to separate from the guide rail 223, and thus the energy storage striking device 20 is switched from the energy storage state to the firing state.

When the energy storage striking device 20 is in a striking state, the extension leg 2531 is separated from the clamping groove 2611, the buckling groove 250 is separated from the guide rail 223, and the striking rod 22 axially moves to strike the brake handle 2 on the pump body 1.

When the energy storage striking device 20 is in an energy storage state, the pull rod 23 is pulled to move axially away from the striking rod 22, so as to drive the striking rod 22 to move axially and compress the energy storage spring 24 until the barb 223 on the striking rod 22 is matched with the locking groove 250 of the locking piece 252 to realize positioning. The release lever 261 is simultaneously rotated clockwise to be reset when the pull rod 23 pulls the striking rod 22 to move.

The release mechanism 26 also includes a spring 262. One end of the elastic sheet 262 is fixed on the second end plate 213, and the other end is elastically abutted to the release lever 261, so that the stability of the release lever 261 is improved, and the release lever 261 is prevented from rotating due to the high-speed rotation of the turbine pump when the brake is not required to be opened, and the false triggering is avoided.

The release mechanism 26 also includes a safety latch 263. The release lever 261 is provided with a safety insertion hole (not shown), and one end of the safety latch 263 passes through the second end plate 213 and is inserted into the safety insertion hole. Before the release lever 261 is pulled to rotate, the safety latch 263 needs to be pulled out, so that the release lever 261 is prevented from being operated by mistake, and the brake is prevented from being opened by mistake.

Further, the release mechanism 26 also includes a brake assembly disposed below the base plate 211.

The brake assembly includes a brake cable 264 and a return spring 265. The brake cable 264 is connected below the bottom plate 211 through the hanging plate 210 in a manner that the axial direction thereof is parallel to the length direction of the bottom plate 211, and can move back and forth in the axial direction relative to the bottom plate 211. The brake cable 264 passes through the release lever 261 and is fixed relative to the release lever 261, and when the brake cable 264 moves back and forth in the axial direction, the release lever 261 is rotated, and the brake cable 264 acts as the gravitational transmission line.

Brake cable 264 is provided with a clamp 266, a return spring 265 is sleeved on brake cable 264, and the opposite ends of the return spring are respectively abutted against clamp 266 and a hanging plate 210. Brake cable 264 moves under the pull of an external force while compressing return spring 265; when the external force disappears, the return spring 265 extends and resets under the action of restoring force, and simultaneously drives the brake cable 264 to move reversely and reset.

Referring to fig. 1, when the mechanical remote brake opening system is used, the mechanical remote brake opening system is installed before an overspeed test of a steam turbine pump and is dismantled after the overspeed test; the energy storage striking device 20 is in a power storage state after being installed. When the steam turbine pump needs to be braked in an overspeed test, a worker only needs to pull the gravity transmission line through the pressing pedal mechanism before the monitoring system or the control cabinet, start the energy storage impacting device 20 to enter a triggering state and impact the brake handle 2, and does not need to manually brake before the steam turbine pump.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.