阅读说明：本技术 一种水利工程用小型水库自动泄洪闸 (Automatic flood discharge floodgate of small-size reservoir for hydraulic engineering ) 是由 马何帅 于 2021-07-16 设计创作，主要内容包括：本发明涉及一种泄洪闸,尤其涉及一种水利工程用小型水库自动泄洪闸。包括有导轨板、密封板、竖板、闸门组件、闸门开合控制组件,水库两侧设有一对导轨板,导轨板上固接有一对密封板,位于上方的导轨板顶部设有竖板,导轨板上安装有闸门组件,竖板上设有闸门开合控制组件。通过闸门本体、第一压缩弹簧及其上装置的相互配合,闸门本体会在第一压缩弹簧的复位作用下往两边移动,闸门本体不再将水挡住,水可以从此处往外流出,因此达到了当水位上升到一定高度可以自动泄洪的目的。(The invention relates to a flood discharge gate, in particular to an automatic flood discharge gate of a small reservoir for hydraulic engineering. Including guide rail board, closing plate, riser, gate subassembly, gate control assembly that opens and shuts, the reservoir both sides are equipped with a pair of guide rail board, and the rigid coupling has a pair of closing plate on the guide rail board, and the guide rail board top that is located the top is equipped with the riser, installs the gate subassembly on the guide rail board, is equipped with the gate control assembly that opens and shuts on the riser. Through mutually supporting of gate body, first compression spring and device above that, this meeting of gate moves toward both sides under first compression spring's reset action, and the gate body no longer keeps off water, and water can flow out from this place outwards, has consequently reached and has risen the mesh that can automatic flood discharge to the take the altitude when the water level.)

1. The utility model provides a hydraulic engineering is with automatic flood discharge floodgate of small-size reservoir, characterized by: including the guide rail board, the closing plate, the riser, the gate subassembly, the gate control assembly that opens and shuts, supporting component, prop open the subassembly, the fry collecting component, promote the subassembly and push away from the subassembly, the reservoir both sides are equipped with a pair of guide rail board, the rigid coupling has a pair of closing plate on the guide rail board, the guide rail board top that is located the top is equipped with the riser, install the gate subassembly on the guide rail board, be equipped with the gate control assembly that opens and shuts on the riser, be equipped with the supporting component on the riser, be equipped with on the closing plate and prop open the subassembly, the riser is located at the back to the fry collecting component, be equipped with the promotion subassembly on the fry collecting component, it locates on the subassembly that struts to push away from the subassembly.

2. The small-sized reservoir automatic flood discharge gate for water conservancy projects according to claim 1, which is characterized in that: the gate assembly comprises a gate body, a first compression spring and a round rod, a pair of gate bodies is arranged on the guide rail plate in a sliding mode, the first compression spring is connected between the gate bodies and the sealing plate, and the round rod is fixedly connected to the gate bodies.

3. The small-sized reservoir automatic flood discharge gate for water conservancy projects according to claim 2, which is characterized in that: the gate opening and closing control assembly comprises an inclined plane pushing plate, a supporting sleeve, clamping rods, a second compression spring, a first pushing frame and a third compression spring, the inclined plane pushing plate is arranged on a vertical plate in a sliding mode, the supporting sleeve is fixedly connected to the vertical plate, the pair of clamping rods are connected to the supporting sleeve in a sliding mode, the second compression spring is connected between the supporting sleeve and the clamping rods, the first pushing frame is connected to the supporting sleeve in a sliding mode, the third compression spring is connected to the first pushing frame and the supporting sleeve, and the first pushing frame is in contact with the clamping rods.

4. The small-sized reservoir automatic flood discharge gate for water conservancy projects according to claim 3, which is characterized in that: the supporting component comprises a fixing frame, a supporting rod and a fourth compression spring, a pair of fixing frames are arranged on the vertical plate, a pair of supporting rods are arranged in the fixing frame in a sliding mode, and the fourth compression spring is connected between the fixing frame and the supporting rods.

5. The small-sized reservoir automatic flood discharge gate for water conservancy projects according to claim 4, which is characterized in that: the opening assembly comprises a first supporting plate, a floating ball frame, a second pushing frame, an opening frame and a reset spring, the first supporting plate is arranged on the sealing plate, the floating ball frame is arranged on the first supporting plate in a sliding mode, the second pushing frame is arranged on the fixing frame in a sliding mode, a pair of opening frames are arranged on one side of the second pushing frame, and the reset spring is connected between the second pushing frame and the fixing frame.

6. The small-sized reservoir automatic flood discharge gate for water conservancy projects according to claim 5, which is characterized in that: the fry collecting assembly comprises a slotted guide plate, a movable sleeve, a net frame and a connecting rod, wherein a pair of slotted guide plates are arranged behind a sealing plate, the movable sleeve is arranged on the slotted guide plate in a sliding mode, the net frame is connected with the lower portion of the guide plate in a rotating mode, the connecting rod is connected with the net frame in a rotating mode, and the movable sleeve is connected with the connecting rod in a rotating mode.

7. The small-sized reservoir automatic flood discharge gate for water conservancy projects according to claim 6, which is characterized in that: the promotion subassembly is including the baffle, the movable rack, the apparatus further comprises a rotating shaft, freewheel clutch, drive gear, first catch bar, the second catch bar, promote the strip, the second extension board, fluting swinging plate and strip of pushing away, be equipped with the baffle on the riser, the sliding connection has the movable rack on the baffle, the rotating connection has the pivot on the closing plate, be equipped with freewheel clutch in the pivot, be equipped with drive gear on the freewheel clutch, drive gear and movable rack meshing, the rigid coupling has first catch bar in the pivot, the rotating connection has the second catch bar on the first catch bar, the rotating connection has the strip of pushing away on the second catch bar, the strip rigid coupling of pushing away is on one of them movable sleeve, the rigid coupling has the second extension board on the riser, the rotating connection has the fluting swinging plate on the second extension board, fluting swinging plate and movable rack slidingtype cooperation, the rigid coupling has the strip of pushing away on the inclined plane catch bar.

8. The small-sized reservoir automatic flood discharge gate for water conservancy projects according to claim 7, characterized in that: the pushing-separating component comprises a slotting guide seat, a sliding support plate, a fifth compression spring and a pushing-separating frame, the slotting guide seat is fixedly connected to a vertical plate, the slotting guide seat is connected with a pair of sliding support plates in a sliding mode, the fifth compression spring is connected between the slotting guide seat and the sliding support plate, the second pushing frame is provided with the pushing-separating frame, and the pushing-separating frame is in contact with the sliding support plates.

Technical Field

The invention relates to a flood discharge gate, in particular to an automatic flood discharge gate of a small reservoir for hydraulic engineering.

Background

Flood discharge is the discharge of flood water. The flood discharge gate is mainly used for discharging flood, and the gate is opened to discharge water to a downstream flood discharge area due to the fact that the water level of a reservoir is over-high caused by continuous strong rainfall, or serious disasters caused by collapse of a reservoir dam and a weir are avoided. A flood discharge gate is mainly used for discharging flood. Reservoirs, generally interpreted as "water conservancy structures that store and hold floods and regulate water flow, can be utilized for irrigation, power generation, flood control and fish farming. "it refers to an artificial lake formed by building a barrage at the throat of a mountain ditch or river. After the reservoir is built, the functions of flood control, water storage irrigation, water supply, power generation, fish culture and the like can be realized. Sometimes natural lakes are also called reservoirs (natural reservoirs). The reservoir is one of the engineering measures widely adopted in flood control in China. A comprehensive utilization reservoir capable of regulating and storing flood is built at a proper position of an upstream river channel in a flood prevention area, the flood is blocked by utilizing the reservoir capacity of the reservoir, the peak flow entering the downstream river channel is reduced, and the aim of reducing and avoiding flood disasters is fulfilled.

The existing flood discharge gate needs to be manually operated to open the gate and drain water, a large amount of manual resources are wasted by long-term manual monitoring, and if the flood discharge gate is continuously detected in the plum rain season, people can be tired, and accidents can be caused sometimes.

Therefore, there is a need to design an automatic flood discharge gate for small reservoir in hydraulic engineering, which can achieve automatic flood discharge under unattended condition and can prevent fish from being washed away by water flow.

Disclosure of Invention

In order to overcome the defects that the existing flood discharge gate needs to be manually operated to open the gate and drain water, a large amount of manual resources are wasted by long-term manual monitoring, and people are tired if the flood discharge gate is continuously detected in plum rain season, and accidents are sometimes caused, the technical problem of the invention is as follows: the small reservoir automatic flood discharge gate for the hydraulic engineering can achieve the automatic flood discharge function under the unattended condition.

The technical implementation scheme of the invention is as follows: the utility model provides a hydraulic engineering is with automatic floodgate that spills of small-size reservoir, including the guide rail board, the closing plate, the riser, the gate subassembly, the gate control assembly that opens and shuts, the supporting component, prop the subassembly, the fry is collected the subassembly, promote the subassembly and push away from the subassembly, the reservoir both sides are equipped with a pair of guide rail board, the rigid coupling has a pair of closing plate on the guide rail board, the guide rail board top that is located the top is equipped with the riser, install the gate subassembly on the guide rail board, be equipped with the gate control assembly that opens and shuts on the riser, be equipped with the supporting component on the riser, be equipped with the subassembly that struts on the closing plate, the fry is collected the subassembly and is located behind the riser, be equipped with the promotion subassembly on the fry is collected the subassembly, push away from the subassembly and locate on the subassembly and strut the subassembly.

In addition, it is particularly preferable that the gate assembly includes a gate body, a first compression spring, and a round bar, the pair of gate bodies is slidably provided on the guide rail plate, the pair of first compression springs is connected between the gate body and the sealing plate, and the round bar is fixedly connected to the gate body.

In addition, it is especially preferred that the gate opening and closing control assembly comprises an inclined plane pushing plate, a supporting sleeve, a clamping rod, a second compression spring, a first pushing frame and a third compression spring, wherein the inclined plane pushing plate is arranged on a vertical plate in a sliding manner, the supporting sleeve is fixedly connected to the vertical plate, the pair of clamping rods is connected to the supporting sleeve in a sliding manner, the second compression spring is connected between the supporting sleeve and the clamping rod, the first pushing frame is connected to the supporting sleeve in a sliding manner, the third compression spring is connected to the first pushing frame and the supporting sleeve, and the first pushing frame is in contact with the clamping rod.

In addition, it is especially preferred that the supporting component comprises a fixing frame, a supporting rod and a fourth compression spring, wherein a pair of fixing frames is arranged on the vertical plate, a pair of supporting rods is arranged in the fixing frame in a sliding mode, and the fourth compression spring is connected between the fixing frame and the supporting rod.

In addition, it is especially preferred that the opening assembly comprises a first support plate, a floating ball frame, a second pushing frame, an opening frame and a return spring, the first support plate is arranged on the sealing plate, the floating ball frame is arranged on the first support plate in a sliding mode, the second pushing frame is arranged on the fixing frame in a sliding mode, a pair of opening frames is arranged on one side of the second pushing frame, and the return spring is connected between the second pushing frame and the fixing frame.

In addition, it is especially preferred that the fry collecting assembly comprises a slotted guide plate, a movable sleeve, a net frame and a connecting rod, wherein a pair of slotted guide plates are arranged behind the sealing plate, the movable sleeve is arranged on the slotted guide plate in a sliding mode, the net frame is rotatably connected below the guide plate, the connecting rod is rotatably connected to the net frame, and the movable sleeve is rotatably connected with the connecting rod.

In addition, particularly preferably, the pushing component comprises a guide plate, a movable rack, a rotating shaft, an overrunning clutch and a driving gear, first catch bar, the second catch bar, promote the strip, the second extension board, fluting swinging plate and strip that pushes away, be equipped with the baffle on the riser, the gliding type is connected with the movable rack on the baffle, the rotating type is connected with the pivot on the closing plate, be equipped with freewheel clutch in the pivot, freewheel clutch is last to be equipped with drive gear, drive gear and movable rack meshing, the rigid coupling has first catch bar in the pivot, the rotating type is connected with the second catch bar on the first catch bar, the rotating type is connected with the promotion strip on the second catch bar, promote a rigid coupling on one of them movable sleeve, the rigid coupling has the second extension board on the riser, the rotating type is connected with the fluting swinging plate on the second extension board, fluting swinging plate and movable rack slidingtype cooperation, the rigid coupling has the strip on the inclined plane catch bar.

In addition, it is especially preferred that the pushing-off assembly comprises a slotted guide seat, a sliding support plate, a fifth compression spring and a pushing-off frame, the slotted guide seat is fixedly connected to the vertical plate, the slotted guide seat is slidably connected with the pair of sliding support plates, the fifth compression spring is connected between the slotted guide seat and the sliding support plates, the second pushing frame is provided with the pushing-off frame, and the pushing-off frame is in contact with the sliding support plate.

The beneficial effects are that: through the mutual cooperation of pivot, slip backup pad and device above that, the movable sleeve continues up-moving and can promote the slip backup pad and move inwards, and fifth compression spring is compressed, and fifth compression spring can reset when continuing up-moving, promotes the slip backup pad thereupon and resets for the slip backup pad supports the movable sleeve and makes it can not drop, thereby the frame of being convenient for can collect the fish, reaches the effect that prevents the fish and is washed away by rivers.

Through mutually supporting of gate body, first compression spring and device above that, this meeting of gate moves toward both sides under first compression spring's reset action, and the gate body no longer keeps off water, and water can flow out from this place outwards, has consequently reached and has risen the mesh that can automatic flood discharge to the take the altitude when the water level.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention.

Fig. 2 is a schematic perspective view of a second embodiment of the present invention.

Fig. 3 is a perspective view of the gate assembly of the present invention.

FIG. 4 is a schematic view of a first partial body structure according to the present invention.

Fig. 5 is a schematic perspective view of the gate opening/closing control assembly of the present invention.

FIG. 6 is a schematic view of a second partial body structure according to the present invention.

Fig. 7 is a perspective view of the distracting assembly of the present invention.

Fig. 8 is a schematic perspective view of the fry collecting assembly of the present invention.

Fig. 9 is a perspective view of the pushing assembly of the present invention.

Fig. 10 is a perspective view of the push-off assembly of the present invention.

Fig. 11 is a schematic separated perspective view of the push-off assembly of the present invention.

In the figure: 1-guide rail plate, 2-sealing plate, 3-vertical plate, 4-gate component, 41-gate body, 42-first compression spring, 43-round rod, 5-gate opening and closing control component, 51-inclined plane pushing plate, 52-supporting sleeve, 53-clamping rod, 54-second compression spring, 55-first pushing frame, 56-third compression spring, 6-supporting component, 61-fixed frame, 62-supporting rod, 63-fourth compression spring, 7-expanding component, 71-first supporting plate, 72-floating ball frame, 73-second pushing frame, 74-expanding frame, 75-reset spring, 8-fry collecting component, 81-slotted guide plate, 82-movable sleeve, 83-net frame, 84-connecting rod, 9-pushing component, 91-guide plate, 92-movable rack, 93-rotating shaft, 94-overrunning clutch, 95-driving gear, 96-first pushing rod, 97-second pushing rod, 98-pushing strip, 99-second support plate, 910-slotted swinging plate, 911-pushing strip, 10-pushing-away component, 101-slotted guide seat, 102-sliding support plate, 103-fifth compression spring and 104-pushing-away frame.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment is that the automatic flood discharge gate of the small reservoir for the hydraulic engineering comprises a guide rail plate 1, a sealing plate 2, a vertical plate 3, a gate component 4, a gate opening and closing control component 5, a supporting component 6, a spreading component 7, a fry collecting component 8, a pushing component 9 and a pushing and separating component 10, wherein a pair of guide rail plates 1 are arranged at two sides of the reservoir, the guide rail plates 1 are fixedly connected with a pair of sealing plates 2, the vertical plate 3 is arranged at the top of the guide rail plate 1 above, the gate component 4 is arranged on the guide rail plate 1, the gate opening and closing control component 5 is arranged on the vertical plate 3 close to one end of the guide rail plate 1, the supporting component 6 is arranged on the vertical plate 3 far away from one end of the guide rail plates 1, the spreading component 7 is arranged on the sealing plate 2 far away from one end of the supporting component 6, the fry collecting component 8 is arranged behind the vertical plate 3, the fry collecting component 8 is used for collecting fry, the pushing component 9 is arranged on the fry collecting component 8, the push-off component 10 is arranged on the expansion component 7.

The gate assembly 4 comprises a gate body 41, a first compression spring 42 and a round rod 43, the guide rail plate 1 is slidably provided with a pair of gate bodies 41, the gate bodies 41 are used for controlling water drainage of a reservoir, a pair of first compression springs 42 is connected between the gate bodies 41 and the sealing plate 2, the first compression springs 42 are used for driving the gate bodies 41 to reset, and the round rod 43 is fixedly connected to the gate bodies 41 far away from one end of the sealing plate 2.

The gate opening and closing control component 5 comprises an inclined plane pushing plate 51, a supporting sleeve 52, a clamping rod 53, a second compression spring 54, a first pushing frame 55 and a third compression spring 56, the vertical plate 3 is provided with the inclined plane pushing plate 51 in a sliding mode, the vertical plate 3 is fixedly connected with the supporting sleeve 52, the supporting sleeve 52 close to the bottom of the vertical plate 3 is connected with a pair of clamping rods 53 in a sliding mode, the second compression spring 54 is connected between the supporting sleeve 52 and the clamping rod 53, the second compression spring 54 is used for resetting the clamping rod 53, the supporting sleeve 52 far away from the guide rail plate 1 below is connected with the first pushing frame 55 in a sliding mode, the first pushing frame 55 and the supporting sleeve 52 in the middle of the supporting sleeve 52 are connected with the third compression spring 56, and the first pushing frame 55 is in contact with the clamping rod 53.

The supporting component 6 comprises a fixing frame 61, a supporting rod 62 and a fourth compression spring 63, a pair of fixing frames 61 is arranged on the vertical plate 3, a pair of supporting rods 62 is arranged in the fixing frame 61 far away from one end of the guide rail plate 1 in a sliding mode, the supporting rods 62 are used for supporting, and the fourth compression spring 63 is connected between the fixing frame 61 and the supporting rods 62.

The opening assembly 7 comprises a first support plate 71, a floating ball frame 72, a second pushing frame 73, an opening frame 74 and a reset spring 75, the first support plate 71 is arranged on the sealing plate 2, the floating ball frame 72 is arranged on the first support plate 71 far away from one end of the fixing frame 61 in a sliding mode, the second pushing frame 73 is arranged on the fixing frame 61 in a sliding mode, one side of the second pushing frame 73 far away from one end of the pushing strip 911 is provided with a pair of opening frames 74, the opening frames 74 can be used for pushing the supporting rod 62 to move, and the reset spring 75 is connected between the second pushing frame 73 and the fixing frame 61.

The fry collecting assembly 8 comprises a slotted guide plate 81, a movable sleeve 82, a net frame 83 and a connecting rod 84, one side of the sealing plate 2 far away from one end of the fixed frame 61 is provided with a pair of slotted guide plates 81, the slotted guide plate 81 close to one end of the net frame 83 is provided with the movable sleeve 82 in a sliding manner, the lower part of the guide plate 1 is rotatably connected with the net frame 83, the net frame 83 is used for preventing fishes from being washed away by water flow, the net frame 83 is rotatably connected with the connecting rod 84, and the movable sleeve 82 capable of sliding along the slotted guide plate 81 and the connecting rod 84 are rotatably connected.

The pushing assembly 9 comprises a guide plate 91, a movable rack 92, a rotating shaft 93, an overrunning clutch 94, a driving gear 95, a first pushing rod 96, a second pushing rod 97, a pushing strip 98, a second support plate 99, a slotted swinging plate 910 and a pushing strip 911, wherein the guide plate 91 is arranged on a vertical plate 3 at one end far away from the guide plate 1, the guide plate 91 at one end close to the second support plate 99 is connected with the movable rack 92 in a sliding manner, the rotating shaft 93 is connected on the sealing plate 2 in a rotating manner, the overrunning clutch 94 is arranged on the rotating shaft 93, the overrunning clutch 94 only transmits power in one direction, the driving gear 95 is arranged on the overrunning clutch 94, the driving gear 95 is meshed with the movable rack 92, the rotating shaft 93 at one end far away from the guide plate 91 is fixedly connected with the first pushing rod 96, the first pushing rod 96 is connected with the second pushing rod 97 in a rotating manner, the second pushing rod 97 is connected with the pushing strip 98 in a rotating manner, and the pushing strip 98 is fixedly connected on one movable sleeve 82, a second support plate 99 is fixedly connected to the vertical plate 3, a slotted swing plate 910 is rotatably connected to the second support plate 99, the slotted swing plate 910 is slidably matched with the movable rack 92, and a push bar 911 is fixedly connected to the inclined push plate 51.

The push-off component 10 comprises a slotted guide seat 101, a sliding support plate 102, a fifth compression spring 103 and a push-off frame 104, the vertical plate 3 is fixedly connected with the slotted guide seat 101, the slotted guide seat 101 near one end of the slotted guide plate 81 is connected with a pair of sliding support plates 102 in a sliding manner, the fifth compression spring 103 is connected between the slotted guide seat 101 and the sliding support plates 102, the second push frame 73 far away from one end of the floating ball frame 72 is provided with the push-off frame 104, and the push-off frame 104 near one end of the net frame 83 is in contact with the sliding support plates 102.

The inclined plane pushing plate 51 is fixed with a floating plate, when the reservoir water level rises to contact with the floating plate on the inclined plane pushing plate 51, the inclined plane pushing plate 51 and the upper device are driven to move upwards under the buoyancy action of the floating plate, the water surface can push the inclined plane pushing plate 51 to move upwards, when the water level reaches the supporting rod 62, the water can push the inclined plane pushing plate 51 to move upwards towards the fixing frame 61, the supporting rod 62 is pressed to move towards two sides, the inclined plane pushing plate 51 is clamped to prevent the inclined plane pushing plate 51 from falling off due to the gravity, then when the water level continues to rise, the water can continue to push the inclined plane pushing plate 51 to move upwards, when the inclined plane pushing plate 51 is contacted with the first pushing frame 55, the inclined plane pushing plate 51 drives the first pushing frame 55 to move upwards, the first pushing frame 55 moves upwards to push the clamping rod 53 to move upwards, the clamping rod 53 does not clamp the round rod 43 any more, the gate body 41 can move towards two sides under the resetting action of the first compression spring 42, then the gate body 41 no longer blocks the water, and the water can flow out from the gate body, so that the flood discharge can be realized.

Meanwhile, when the water level moves upwards, the push bar 911 pushes the slotted swing plate 910 to move upwards, the slotted swing plate 910 will drive the movable rack 92 to move downwards under the action of the second support plate 99, the movable rack 92 moves downwards to drive the driving gear 95 to move 180 degrees clockwise, the driving gear 95 drives the rotating shaft 93 and the upper device to rotate through the overrunning clutch 94, the rotating shaft 93 rotating clockwise drives the push bar 98 and the upper device to move upwards through the cooperation of the first push rod 96 and the second push rod 97, and then drives the connecting rod 84 and the net frame 83 to move upwards, the movable sleeve 82 moves upwards along the slotted guide plate 81, when the movable sleeve 82 continues to move upwards, the sliding support plate 102 is pushed to move inwards, the fifth compression spring 103 is compressed, when the movable sleeve 82 continues to move upwards, the fifth compression spring 103 is reset, and then the fifth compression spring 103 pushes the sliding support plate 102 to reset, the movable sleeve 82 is supported by the sliding support plate 102 so as not to fall off, and the net frame 83 is turned over by 90 degrees under the action of the connecting rod 84 in the upward movement process of the net frame 83, so that the net frame 83 can collect fish conveniently, and the effect of preventing the fish from being washed away by water flow is achieved.

When the water level drops to a certain degree, first extension board 71 and floater 72 and the device on it can the downstream, and the opening frame 74 downstream can promote bracing piece 62 and move outward, and bracing piece 62 is not blocking inclined plane pushing plate 51, and inclined plane pushing plate 51 can be under the effect of gravity downstream, and round bar 43 can reset along inclined plane pushing plate 51's chute then, and other devices are along with resetting.

When the water level drops, the first support plate 71 and the floating ball frame 72 move downwards to drive the second pushing frame 73 and the pushing frame 104 to move downwards, the pushing frame 104 moves downwards and simultaneously pushes the sliding support plate 102 on the slotted guide seat 101 to move inwards, the sliding support plate 102 does not support the movable sleeve 82, and the movable sleeve 82 and the upper device thereof move downwards to reset under the action of gravity.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.