阅读说明：本技术 水电站基础人孔防护装置及方法 (Hydropower station foundation manhole protection device and method ) 是由 包唐伟 于 2021-06-21 设计创作，主要内容包括：一种水电站基础人孔防护装置及方法,它包括滑道、推动机构、防护栏和锁定机构,通过推动机构的滑轨位于滑道的腔体内滑动配合,多个滑道呈环形布设,多个防护栏与滑轨连接组成圆筒形栅格,通过滑道与人孔内壁固定,圆筒形栅格沿滑道向上滑动形成防护,锁定机构锁定圆筒形栅格。本发明克服了原水电站基础人孔防护过程中需要频繁搭设和拆除,受到外力撞击导致防护失效的问题,具有结构简单,快速对人孔形成防护,防护过程中受到外力撞击不会发生位移,安全可靠,无需拆卸转移,操作简单方便的特点。(A protection device and a protection method for a foundation manhole of a hydropower station comprise a slideway, a pushing mechanism, protective guards and a locking mechanism, wherein the slideway of the pushing mechanism is positioned in a cavity of the slideway and is in sliding fit with the cavity, a plurality of slideways are annularly arranged, the protective guards and the slideway are connected to form a cylindrical grid, the cylindrical grid is fixed with the inner wall of the manhole through the slideway, the cylindrical grid slides upwards along the slideway to form protection, and the locking mechanism locks the cylindrical grid. The manhole protection device solves the problems that a base manhole of a raw water power station needs to be frequently erected and dismantled in the protection process and the protection fails due to external force impact, and has the characteristics of simple structure, safety, reliability, no need of disassembly and transfer, and simplicity and convenience in operation, and the manhole protection device can quickly form protection for the manhole, cannot displace due to the external force impact in the protection process, and is safe and reliable.)

1. The utility model provides a power station basis manhole protector which characterized by: the device comprises a slideway (1), a pushing mechanism (2), a protective guard (3) and a locking mechanism (4); the sliding rails (21) of the pushing mechanism (2) are positioned in the cavities of the sliding rails (1) and are in sliding fit, the sliding rails (1) are annularly arranged, and the guard railings (3) are connected with the sliding rails (21) to form a cylindrical grid; the cylindrical grid slides upwards along the slideway (1) to form protection; the locking mechanism (4) is positioned outside the cylindrical grid, and the locking pin (42) penetrates through the slideway (1) to lock the sliding rail (21).

2. The hydroelectric power station foundation manhole protection device of claim 1, wherein: the slide (1) is the rectangular pipe that sets up notch (11), and the rectangular pipe both sides set up spacing groove (12) and anchor (13), and notch (11) side sets up ear seat (14) and push rod (22) one end swing joint.

3. The hydroelectric power station foundation manhole protection device of claim 2, wherein: the corresponding side of the upper end of the notch (11) of the slideway (1) is provided with a plug hole (15); the upper end of the slideway (1) is provided with a bracket (16) which is matched with the cylindrical grid.

4. The hydroelectric power station foundation manhole protection device of claim 2, wherein: the side of a notch (11) of the slideway (1) is connected with a plurality of transition crawling ladders (17) which are arranged at equal intervals.

5. The hydroelectric power station foundation manhole protection device of claim 1, wherein: the pushing mechanism (2) comprises a push rod (22) connected with a sliding rail (21) through a pin shaft, and rollers (23) arranged on two sides of the sliding rail (21), wherein the rollers (23) are matched with the sliding rail (1) in a rolling manner.

6. The hydroelectric power station foundation manhole protection device of claim 5, wherein: slide rail (21) one side sets up dodges groove (24) and push rod (22) cooperation, and the upper end sets up and carries pull rod (25), and slide rail (21) both ends set up the locking hole respectively and correspond with spliced eye (15) on slide (1).

7. The hydroelectric power station foundation manhole protection device of claim 1, wherein: the guard rail (3) comprises a plurality of vertical rods (32) vertically and crossly connected with the limiting rod (31), and two ends of each vertical rod (32) are connected with the cross rod (33); the upper part of the limiting rod (31) is provided with a skirting board (34) connected with the vertical rod (32).

8. The hydroelectric power station foundation manhole protection device of claim 7, wherein: the limiting rod (31), the cross rod (33) and the skirting board (34) are all arc-shaped structures; a cross bar (33) at the upper end of the guard rail (3) is connected with the slide rail (21), and a limiting rod (31) is in sliding fit with the limiting groove (12).

9. The hydroelectric power station foundation manhole protection device of claim 1, wherein: the locking mechanism (4) comprises a locking pin (42) in sliding fit with the fixing pipe (41), the operating handle (43) penetrates through a guide groove (44) in the fixing pipe (41) to be connected with the locking pin (42), a communicated locking groove (45) is formed in one side of the guide groove (44), the spring (46) is positioned in the fixing pipe (41) and sleeved on the locking pin (42), and two ends of the spring (46) are respectively abutted against a check ring on the locking pin (42) and a step on the inner wall of the fixing pipe (41); the operating handle (43) pushes the locking pin (42) to extend out of the fixed pipe (41) and pass through the insertion hole (15) of the slideway (1) to be matched and locked with the locking hole of the sliding rail (21).

10. The protection method of the manhole protection device of the hydropower station base as claimed in any one of claims 1 to 9, which comprises the following steps:

s1, installing a slide way, integrally hoisting the cylindrical grid into a circular manhole by adopting hoisting equipment, positioning a fixing pipe (41) of a locking mechanism (4) in a basic hole at the edge of the manhole, positioning the upper end of the slide way (1) and a horizontal plane of the base on the same plane, sequentially anchoring the anchoring pieces (13) at two sides of the slide way (1) and the inner wall of the manhole, and removing the hoisting equipment; in the step, the slide rail (21) is positioned in the slide way (1), and the cross bar (33) at the upper end of the slide rail (21) is positioned in the bracket (16);

s2, checking the state, checking whether the operation handle (43) of all the locking mechanisms (4) is positioned in the guide groove (44), and the operation handle (43) is positioned at the tail end of the guide groove (44) beyond the locking groove (45); if yes, judging that the locking mechanism (4) is in an unlocked state, positioning the locking pin (42) in the fixing pipe (41), and entering the next step;

s3, forming protection, starting the push rod (22), pushing the slide rail (21) to move upwards, and stopping the push rod (22) after the limiting rod (31) is abutted against the limiting groove (12) for limiting; at the moment, the cylindrical grid rises to the upper part of the manhole to form protection, and skirting boards (34) are positioned around the edge of the manhole;

s4, locking and protecting, namely pushing the operating handle (43) to drive the locking pin (42) to extend out of the fixed pipe (41) to penetrate through the inserting hole (15) on the slideway (1) to be matched with the locking hole on the sliding rail (21) to lock the cylindrical grid; then the operating handle (43) is rotated to one side and enters the locking groove (45) from the guide groove (44) to be matched with the locking groove, and the operating handle (43) is positioned in the basic hole; in this step, the spring (46) is in a compressed state;

s5, unlocking and resetting, wherein the operating handle (43) in the basic hole is rotated to enter the guide groove (44) from the locking groove (45), and the spring (46) extends to push the locking pin (42) to withdraw and retract from the locking hole on the sliding rail (21) and the inserting hole (15) on the sliding rail (1) to the fixed pipe (41); the push rod (22) is started, the cylindrical grid is pulled downwards to retract into the manhole, and when the cross rod (33) at the upper end of the slide rail (21) is positioned in the bracket (16), the push rod (22) stops;

after S2, before S3, the operator enters the manhole;

after S5, the operator enters the manhole along the transition ladder (17) and covers the manhole with a cover plate.

Technical Field

The invention belongs to the technical field of safety protection, and relates to a hydropower station foundation manhole protection device and a hydropower station foundation manhole protection method.

Background

In power station infrastructure or equipment facility, there can often be the manhole, and the purpose of setting up the manhole is that be convenient for operating personnel pass in and out the facility or equipment inside and outside maintain, inspection or specific operation etc. to facility or equipment, before operating personnel gets into, the manhole is generally covered by the apron, and during the entering, move the apron, after personnel get into, need protect around the manhole, avoid all the other operating personnel to fall the manhole and lead to the casualty accident to take place. At present, a safety fence is usually arranged around a manhole, the safety of a manhole operation area is ensured, and the existing problems are that:

1. the ground of the temporary isolation fence is not provided with a fixed mounting point, so that the isolation fence cannot be effectively fixed at an orifice part, and if the side position is impacted by external force, the isolation fence is easy to move, so that the effect of safe isolation cannot be effectively achieved;

2. the temporary isolation fence is very time-consuming to assemble, disassemble and transport, and labor cost is increased.

Disclosure of Invention

The invention aims to solve the technical problem of providing a protection device and a protection method for a foundation manhole of a hydropower station, which have simple structure, adopt the slide rails of a pushing mechanism to be positioned in a cavity of the slide rails and matched in a sliding manner, a plurality of slide rails are annularly arranged, a plurality of protective guards are connected with the slide rails to form a cylindrical grid, the slide rails are fixed with the inner wall of the manhole, the cylindrical grid slides upwards along the slide rails to form protection, a locking mechanism locks the cylindrical grid, the protection for the manhole is realized quickly, the protection cannot be displaced when being impacted by external force in the protection process, the protection device is safe and reliable, the disassembly and the transfer are not needed, and the operation is simple and convenient.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a hydropower station foundation manhole protection device comprises a slideway, a pushing mechanism, a protective guard and a locking mechanism; the slide rails of the pushing mechanism are positioned in the cavities of the slide rails and are in sliding fit, the plurality of slide rails are annularly arranged, and the plurality of protective guards and the slide rails are connected to form a cylindrical grid; the cylindrical grid slides upwards along the slideway to form protection; the locking mechanism is positioned outside the cylindrical grid, and the locking pin penetrates through the slide way to lock the slide rail.

The slide is the rectangular pipe that sets up the notch, and the rectangular pipe both sides set up spacing groove and anchor union piece, and the notch side sets up ear seat and push rod one end swing joint.

The corresponding side of the upper end of the notch of the slideway is provided with an inserting hole; the upper end of the slideway is provided with a bracket which is matched with the cylindrical grid.

The slot opening side of the slide is connected with a plurality of transition crawling ladders which are arranged at equal intervals.

The pushing mechanism comprises a push rod connected with a slide rail pin shaft and rollers arranged on two sides of the slide rail, and the rollers are matched with the slide rail in a rolling manner.

One side of the sliding rail is provided with an avoiding groove matched with the push rod, the upper end head is provided with a lifting rod, and two ends of the sliding rail are respectively provided with a locking hole corresponding to the insertion hole on the sliding rail.

The guard rail comprises a plurality of vertical rods vertically and crossly connected with the limiting rods, and two ends of each vertical rod are connected with the transverse rods; the upper part of the limiting rod is provided with a skirting board connected with the vertical rod.

The limiting rod, the cross rod and the skirting board are all arc-shaped structures; the horizontal pole and the slide rail connection of rail guard upper end, gag lever post and spacing groove sliding fit.

The locking mechanism comprises a locking pin in sliding fit with the fixed pipe, the operating handle penetrates through a guide groove in the fixed pipe to be connected with the locking pin, a communicated locking groove is formed in one side of the guide groove, the spring is positioned in the fixed pipe and sleeved on the locking pin, and two ends of the spring are respectively abutted against a check ring on the locking pin and a step on the inner wall of the fixed pipe; the operating handle pushes the locking pin to extend out of the fixed pipe and pass through the insertion hole of the slideway to be matched and locked with the locking hole of the sliding rail.

The protection method of the hydropower station foundation manhole protection device comprises the following steps:

s1, installing a slide way, integrally hoisting the cylindrical grid into the circular manhole by adopting hoisting equipment, positioning a fixing pipe of a locking mechanism in a basic hole at the edge of the manhole, positioning the upper end of the slide way and the horizontal plane of the basic hole on the same plane, sequentially anchoring the anchoring pieces at two sides of the slide way and the inner wall of the manhole, and removing the hoisting equipment; in the step, the slide rail is positioned in the slide way, and the cross bar at the upper end of the slide rail is positioned in the bracket;

s2, checking the state, checking whether the operation handles of all the locking mechanisms are positioned in the guide groove and the operation handles are positioned at the tail end of the guide groove beyond the locking groove; if yes, judging that the locking mechanism is in an unlocked state, positioning the locking pin in the fixed pipe, and entering the next step;

s3, forming protection, starting the push rod, pushing the slide rail to move upwards, and stopping the push rod after the limiting rod is abutted against the limiting groove for limiting; at the moment, the cylindrical grid rises to the upper part of the manhole to form protection, and the skirting boards are positioned around the edge of the manhole;

s4, locking protection, namely pushing the operating handle to drive the locking pin to extend out of the fixed pipe, penetrate through the insertion hole in the slide way and be matched with the locking hole in the slide way, and locking the cylindrical grid; then the operating handle is rotated to one side to enter the locking groove from the guide groove to be matched with the locking groove, and the operating handle is positioned in the basic hole; in this step, the spring is in a compressed state;

s5, unlocking and resetting, rotating the operating handle in the basic hole to enable the operating handle to enter the guide groove from the locking groove, and stretching the spring to push the locking pin to withdraw and retract from the locking hole on the sliding rail and the inserting hole on the sliding way into the fixed pipe; the push rod is started, the cylindrical grid is pulled downwards to retract into the manhole, and when the cross bar at the upper end of the slide rail is positioned in the bracket, the push rod is stopped;

after S2, before S3, the operator enters the manhole;

after S5, the operator enters the manhole along the transition ladder and covers the manhole with a cover plate.

A hydropower station foundation manhole protection device comprises a slideway, a pushing mechanism, a protective guard and a locking mechanism; the slide rails of the pushing mechanism are positioned in the cavities of the slide rails and are in sliding fit, the plurality of slide rails are annularly arranged, and the plurality of protective guards and the slide rails are connected to form a cylindrical grid; the cylindrical grid slides upwards along the slideway to form protection; the locking mechanism is positioned outside the cylindrical grid, and the locking pin penetrates through the slide way to lock the slide rail. Simple structure, slide rail through pushing mechanism is located the cavity sliding fit of slide, and a plurality of slides are the annular and lay, and a plurality of rail guards are connected with the slide rail and are constituteed the cylinder grid, and it is fixed with the downthehole wall of people through the slide, and the cylinder grid upwards slides along the slide and forms the protection, and locking mechanical system locking cylinder grid forms the protection to the people hole fast, receives external force striking in the protection process and can not take place the displacement, and safe and reliable need not to dismantle the transfer, and easy operation is convenient.

In the preferred scheme, the slide is the rectangular pipe that sets up the notch, and the rectangular pipe both sides set up spacing groove and anchor union piece, and the notch side sets up ear seat and push rod one end swing joint. The structure is simple, the anchoring piece is fixedly connected with the inner wall of the manhole during installation, and the upper end of the slideway and the manhole base surface are positioned on the same horizontal plane.

In a preferred scheme, inserting holes are formed in the corresponding sides of the upper ends of the notches of the slide ways; the upper end of the slideway is provided with a bracket which is matched with the cylindrical grid. Simple structure, during the use, the spliced eye that is located the slide upper end is towards the basic hole of manhole, and the support groove of slide upper end is used for the bearing cylinder grid to the downward stroke of restriction cylinder grid, after the cylinder grid was supported by the support groove, the spliced eye just corresponded with the locking hole of slide rail upper end.

In a preferable scheme, a plurality of transition ladders which are arranged at equal intervals are connected to the notch side of the slide way. Simple structure, during the use, operating personnel gets into inside and outside the manhole along the transition cat ladder.

In the preferred scheme, the pushing mechanism comprises a push rod connected with a sliding rail pin shaft and rollers arranged on two sides of the sliding rail, and the rollers are matched with the sliding rail in a rolling manner. The structure is simple, when the device is used, the push rod drives the slide rail to slide up and down along the slide way, and the roller is matched with the slide way in a rolling way when the slide rail slides.

In the preferred scheme, one side of the slide rail is provided with an avoiding groove matched with the push rod, the upper end head is provided with a lifting rod, and two ends of the slide rail are respectively provided with a locking hole corresponding to the insertion holes on the slide rail. The structure is simple, and when the push rod mechanism is used, the avoiding groove avoids interference with the push rod in the action process of the push rod; when the cylindrical grid is in a protection state, the locking hole at the lower end of the sliding rail is matched with the locking mechanism, and when the cylindrical grid is positioned in the manhole, the locking hole at the upper end of the sliding rail is matched with the locking mechanism.

In a preferred scheme, the guard rail comprises a plurality of vertical rods vertically and crossly connected with the limiting rods, and two ends of each vertical rod are connected with the cross rods; the upper part of the limiting rod is provided with a skirting board connected with the vertical rod. Simple structure, during the installation, a plurality of rail guards are connected with a plurality of slide rails and are constituteed the cylinder grid, are protected the manhole by the cylinder grid, and the baseboard has increased the structural strength of cylinder grid, plays the guard action to cylinder grid lower extreme simultaneously, avoids receiving gravity striking emergence deformation.

In the preferred scheme, the limiting rod, the cross rod and the skirting board are all arc-shaped structures; the horizontal pole and the slide rail connection of rail guard upper end, gag lever post and spacing groove sliding fit. The structure is simple, during installation, the cross rod at the upper end of the vertical rod is connected with the slide rail, the limiting rod penetrates through the limiting groove to be in sliding fit with the limiting groove, when the slide rail moves up and down, the guard rail moves up and down along with the limiting groove, the limiting rod slides along the limiting groove, and the limiting rod limits the upward stroke of the cylindrical grid.

In a preferred scheme, the locking mechanism comprises a locking pin in sliding fit with the fixed pipe, the operating handle penetrates through a guide groove in the fixed pipe to be connected with the locking pin, a communicated locking groove is formed in one side of the guide groove, the spring is positioned in the fixed pipe and sleeved on the locking pin, and two ends of the spring are respectively abutted against a check ring on the locking pin and a step on the inner wall of the fixed pipe; the operating handle pushes the locking pin to extend out of the fixed pipe and pass through the insertion hole of the slideway to be matched and locked with the locking hole of the sliding rail. When the locking device is used, the operating handle is pushed to drive the locking pin to slide along the guide groove, the spring is compressed, the operating handle rotates towards one side to enter the locking groove after the locking pin extends out of the fixed pipe, the locking pin is limited to reset, and otherwise, the locking pin resets; the locking pin locks the cylindrical grid when extending out of the fixed pipe, and unlocks the cylindrical grid when being reset and retreated into the fixed pipe.

In a preferred scheme, the protection method of the foundation manhole protection device of the hydropower station comprises the following steps:

s1, installing a slide way, integrally hoisting the cylindrical grid into the circular manhole by adopting hoisting equipment, positioning a fixing pipe of a locking mechanism in a basic hole at the edge of the manhole, positioning the upper end of the slide way and the horizontal plane of the basic hole on the same plane, sequentially anchoring the anchoring pieces at two sides of the slide way and the inner wall of the manhole, and removing the hoisting equipment; in the step, the slide rail is positioned in the slide way, and the cross bar at the upper end of the slide rail is positioned in the bracket;

s2, checking the state, checking whether the operation handles of all the locking mechanisms are positioned in the guide groove and the operation handles are positioned at the tail end of the guide groove beyond the locking groove; if yes, judging that the locking mechanism is in an unlocked state, positioning the locking pin in the fixed pipe, and entering the next step;

s3, forming protection, starting the push rod, pushing the slide rail to move upwards, and stopping the push rod after the limiting rod is abutted against the limiting groove for limiting; at the moment, the cylindrical grid rises to the upper part of the manhole to form protection, and the skirting boards are positioned around the edge of the manhole;

s4, locking protection, namely pushing the operating handle to drive the locking pin to extend out of the fixed pipe, penetrate through the insertion hole in the slide way and be matched with the locking hole in the slide way, and locking the cylindrical grid; then the operating handle is rotated to one side to enter the locking groove from the guide groove to be matched with the locking groove, and the operating handle is positioned in the basic hole; in this step, the spring is in a compressed state;

s5, unlocking and resetting, rotating the operating handle in the basic hole to enable the operating handle to enter the guide groove from the locking groove, and stretching the spring to push the locking pin to withdraw and retract from the locking hole on the sliding rail and the inserting hole on the sliding way into the fixed pipe; the push rod is started, the cylindrical grid is pulled downwards to retract into the manhole, and when the cross bar at the upper end of the slide rail is positioned in the bracket, the push rod is stopped;

after S2, before S3, the operator enters the manhole;

after S5, the operator enters the manhole along the transition ladder and covers the manhole with a cover plate. This side easy operation is convenient, need not to set up protective device when business turn over manhole at every turn, need not to dismantle the device after accomplishing the maintenance at every turn, avoids receiving to take place the displacement after the striking and leads to the guard action inefficacy, safe and reliable.

A protection device and a protection method for a foundation manhole of a hydropower station comprise a slideway, a pushing mechanism, protective guards and a locking mechanism, wherein the slideway of the pushing mechanism is positioned in a cavity of the slideway and is in sliding fit with the cavity, a plurality of slideways are annularly arranged, the protective guards and the slideway are connected to form a cylindrical grid, the cylindrical grid is fixed with the inner wall of the manhole through the slideway, the cylindrical grid slides upwards along the slideway to form protection, and the locking mechanism locks the cylindrical grid. The manhole protection device solves the problems that a base manhole of a raw water power station needs to be frequently erected and dismantled in the protection process and the protection fails due to external force impact, and has the characteristics of simple structure, safety, reliability, no need of disassembly and transfer, and simplicity and convenience in operation, and the manhole protection device can quickly protect the manhole from being formed by the external force impact, cannot displace due to the external force impact in the protection process.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the connection of the slide way, the locking mechanism, the pushing mechanism and the guard rail of the present invention.

FIG. 3 is a schematic view of the connection structure of the chute and the push rod of the present invention.

Fig. 4 is a schematic structural view of the slide of the present invention.

Fig. 5 is a schematic structural diagram of the slide rail according to the present invention.

Fig. 6 is a schematic structural diagram of the push rod of the present invention.

Fig. 7 is a schematic structural view of the guard rail of the present invention.

Fig. 8 is a schematic view of the structure of the locking mechanism of the present invention.

Fig. 9 is a schematic structural diagram of the transition ladder stand.

The method comprises the following steps: the device comprises a slideway 1, a notch 11, a limiting groove 12, an anchoring part 13, an ear seat 14, a plugging hole 15, a bracket 16, a transition ladder stand 17, a pushing mechanism 2, a sliding rail 21, a push rod 22, a roller 23, an avoiding groove 24, a lifting rod 25, a guard rail 3, a limiting rod 31, a vertical rod 32, a cross rod 33, a skirting board 34, a locking mechanism 4, a fixing pipe 41, a locking pin 42, an operating handle 43, a guide groove 44, a locking groove 45 and a spring 46.

Detailed Description

As shown in fig. 1 to 9, a hydropower station foundation manhole protection device comprises a slideway 1, a pushing mechanism 2, a guard rail 3 and a locking mechanism 4; the slide rails 21 of the pushing mechanism 2 are positioned in the cavities of the slide ways 1 and are in sliding fit, the plurality of slide ways 1 are annularly arranged, and the plurality of protective railings 3 are connected with the slide rails 21 to form a cylindrical grid; the cylindrical grid slides upwards along the slideway 1 to form protection; the locking mechanism 4 is located outside the cylindrical grid and the locking pin 42 passes through the slideway 1 to lock the slideway 21. Simple structure, slide rail 21 through pushing mechanism 2 is located slide 1's cavity sliding fit, a plurality of slides 1 are the annular and lay, a plurality of rail guards 3 are connected with slide rail 21 and are constituteed the cylinder grid, it is fixed with the downthehole wall of people through slide 1, the cylinder grid upwards slides along slide 1 and forms the protection, locking mechanical system 4 locking cylinder grid, form the protection to the people hole fast, receive external force striking in the protection process and can not take place the displacement, safety and reliability need not to dismantle the transfer, easy operation is convenient.

In the preferred scheme, slide 1 is the rectangular pipe that sets up notch 11, and the rectangular pipe both sides set up spacing groove 12 and anchor 13, and notch 11 side sets up ear seat 14 and push rod 22 one end swing joint. Simple structure, during the installation, anchor 13 is fixed with manhole inner wall connection, and slide 1 upper end and manhole basal surface are located the same horizontal plane.

Preferably, the anchoring piece 13 penetrates through an anchor rod of a fixing plate, the fixing plate is fixedly connected with the slideway 1, and the anchor rod extends into the inner wall of the manhole to be fixedly connected.

In a preferable scheme, the corresponding side of the upper end of the notch 11 of the slideway 1 is provided with a plug hole 15; the upper end of the slideway 1 is provided with a bracket 16 which is matched with the cylindrical grid. The structure is simple, when in use, the inserting hole 15 at the upper end of the slideway 1 faces to the basic hole of the manhole, the bracket 16 at the upper end of the slideway 1 is used for supporting the cylindrical grid and limiting the downward stroke of the cylindrical grid, and after the cylindrical grid is supported by the bracket 16, the inserting hole 15 just corresponds to the locking hole at the upper end of the sliding rail 21.

In a preferable scheme, a plurality of transition ladders 17 which are arranged at equal intervals are connected to the side of the notch 11 of the slideway 1. Simple structure, during the use, operating personnel gets into inside and outside the manhole along transition cat ladder 17.

In a preferred scheme, the pushing mechanism 2 comprises a push rod 22 connected with a sliding rail 21 through a pin shaft, and rollers 23 arranged on two sides of the sliding rail 21, wherein the rollers 23 are in rolling fit with the sliding rail 1. The structure is simple, when the device is used, the push rod 22 drives the slide rail 21 to slide up and down along the slide way 1, and the roller 23 is matched with the slide way 1 in a rolling way when the slide rail 21 slides.

Preferably, the push rod 22 is a pneumatic rod or an electric push rod.

In the preferred scheme, one side of the slide rail 21 is provided with an avoiding groove 24 matched with the push rod 22, the upper end head is provided with a lifting rod 25, and two ends of the slide rail 21 are respectively provided with a locking hole corresponding to the insertion hole 15 on the slide way 1. The structure is simple, and when the push rod mechanism is used, the avoiding groove 24 avoids interfering with the push rod 22 in the action process of the push rod 22; when the cylindrical grid is in a protection state, the locking hole at the lower end of the slide rail 21 is matched with the locking mechanism 4, and when the cylindrical grid is positioned in the manhole, the locking hole at the upper end of the slide rail 21 is matched with the locking mechanism 4.

Preferably, in the event of a failure of the push rod 22, the cylindrical grid is raised to the upper portion of the manhole by applying an upward lifting force to the lifting rod 25.

In a preferred scheme, the guard rail 3 comprises a plurality of vertical rods 32 vertically and crossly connected with a limiting rod 31, and two ends of each vertical rod 32 are connected with a cross rod 33; the upper part of the limiting rod 31 is provided with a skirting board 34 connected with the vertical rod 32. Simple structure, during the installation, a plurality of rail guards 3 are connected with a plurality of slide rails 21 and are constituteed the cylinder grid, are protected the manhole by the cylinder grid, and skirting board 34 has increased the structural strength of cylinder grid, plays the guard action to cylinder grid lower extreme simultaneously, avoids receiving gravity striking to take place to warp.

In a preferred scheme, the limiting rod 31, the cross rod 33 and the skirting board 34 are all arc-shaped structures; the cross bar 33 at the upper end of the guard rail 3 is connected with the slide rail 21, and the limit rod 31 is in sliding fit with the limit groove 12. The structure is simple, during installation, the cross bar 33 at the upper end of the vertical bar 32 is connected with the slide rail 21, the limiting rod 31 penetrates through the limiting groove 12 to be in sliding fit with the limiting groove 12, when the slide rail 21 moves up and down, the protective guard 3 moves up and down along with the limiting groove, the limiting rod 31 slides along the limiting groove 12, and the limiting rod 31 limits the upward stroke of the cylindrical grid.

In a preferred scheme, the locking mechanism 4 comprises a locking pin 42 in sliding fit with the fixed pipe 41, the operating handle 43 passes through a guide groove 44 on the fixed pipe 41 to be connected with the locking pin 42, a communicated locking groove 45 is arranged on one side of the guide groove 44, a spring 46 is positioned in the fixed pipe 41 and sleeved on the locking pin 42, and two ends of the spring 46 are respectively abutted against a retaining ring on the locking pin 42 and a step on the inner wall of the fixed pipe 41; the operating handle 43 pushes the locking pin 42 to extend out of the fixing tube 41 and pass through the insertion hole 15 of the slideway 1 to be matched and locked with the locking hole of the sliding rail 21. When the locking device is used, the operating handle 43 is pushed to drive the locking pin 42 to slide along the guide groove 44, the spring 46 is compressed, after the locking pin 42 extends out of the fixing tube 41, the operating handle 43 rotates towards one side to enter the locking groove 45, the locking pin 42 is limited to reset, and otherwise, the locking pin 42 resets; the locking pin 42 locks the cylindrical grid when it is extended out of the fixing tube 41, and releases the locking of the cylindrical grid when it is returned and retracted into the fixing tube 41.

Preferably, the fixing tube 41 is fixedly connected to one side of the upper end of the chute 1, and the locking pin 42 corresponds to the insertion hole 15.

In a preferred embodiment, the protection method of the hydropower station foundation manhole protection device comprises the following steps:

s1, installing a slide way, integrally hoisting the cylindrical grid into a circular manhole by adopting hoisting equipment, positioning the fixing pipe 41 of the locking mechanism 4 in a basic hole at the edge of the manhole, positioning the upper end of the slide way 1 and the horizontal plane of the basic surface at the same plane, sequentially anchoring the anchoring pieces 13 at two sides of the slide way 1 and the inner wall of the manhole, and removing the hoisting equipment; in the step, the slide rail 21 is positioned in the slide way 1, and the cross bar 33 at the upper end of the slide rail 21 is positioned in the bracket 16;

s2, checking the state that the operation levers 43 of all the locking mechanisms 4 are located in the guide grooves 44 and the operation levers 43 are located at the ends of the guide grooves 44 beyond the locking grooves 45; if yes, judging that the locking mechanism 4 is in an unlocked state, positioning the locking pin 42 in the fixed pipe 41, and entering the next step;

s3, forming protection, starting the push rod 22, pushing the slide rail 21 to move upwards, and stopping the push rod 22 after the limiting rod 31 is abutted against the limiting groove 12 for limiting; at the moment, the cylindrical grid rises to the upper part of the manhole to form protection, and the skirting board 34 is positioned around the edge of the manhole;

s4, locking protection, namely pushing the operating handle 43 to drive the locking pin 42 to extend out of the fixed pipe 41 and pass through the inserting hole 15 on the slideway 1 to be matched with the locking hole on the sliding rail 21, so as to lock the cylindrical grid; then the operating handle 43 is rotated to one side and enters the locking groove 45 from the guide groove 44 to be matched with the guide groove, and the operating handle 43 is positioned in the basic hole; in this step, the spring 46 is in a compressed state;

s5, unlocking and resetting, rotating the operating handle 43 in the basic hole to enable the operating handle to enter the guide groove 44 from the locking groove 45, and stretching the spring 46 to push the locking pin 42 to withdraw and retract from the locking hole on the sliding rail 21 and the inserting hole 15 on the slideway 1 to the fixed pipe 41; the push rod 22 is started, the cylindrical grid is pulled downwards to retract into the manhole, and when the cross bar 33 at the upper end of the slide rail 21 is positioned in the bracket 16, the push rod 22 is stopped;

after S2, before S3, the operator enters the manhole;

after S5, the operator enters the manhole along the transition ladder 17 and covers the manhole with a cover plate. This side easy operation is convenient, need not to set up protective device when business turn over manhole at every turn, need not to dismantle the device after accomplishing the maintenance at every turn, avoids receiving to take place the displacement after the striking and leads to the guard action inefficacy, safe and reliable.

As above power station basis manhole protector, during installation use, slide rail 21 of pushing mechanism 2 is located slide 1's cavity sliding fit, a plurality of slides 1 are the annular and lay, a plurality of rail guards 3 are connected with slide rail 21 and constitute the cylinder grid, it is fixed with the downthehole wall of manhole through slide 1, the cylinder grid forms the protection along slide 1 lapse, locking mechanical system 4 locking cylinder grid, form the protection to the manhole fast, receive external force striking can not take place the displacement in the protection process, safety and reliability, need not to dismantle the transfer, easy operation is convenient.

When the manhole cover is installed, the anchoring piece 13 is fixedly connected with the inner wall of the manhole, and the upper end of the slideway 1 and the base surface of the manhole are positioned on the same horizontal plane.

When the device is used, the inserting hole 15 at the upper end of the slideway 1 faces to a basic hole of a manhole, the bracket 16 at the upper end of the slideway 1 is used for supporting the cylindrical grid and limiting the downward stroke of the cylindrical grid, and after the cylindrical grid is supported by the bracket 16, the inserting hole 15 just corresponds to a locking hole at the upper end of the sliding rail 21.

When in use, an operator enters the manhole along the transition ladder stand 17.

When the device is used, the push rod 22 drives the slide rail 21 to slide up and down along the slide way 1, and the roller 23 is matched with the slide way 1 in a rolling manner when the slide rail 21 slides.

When in use, the avoiding groove 24 avoids interfering with the push rod 22 in the process of the action of the push rod 22; when the cylindrical grid is in a protection state, the locking hole at the lower end of the slide rail 21 is matched with the locking mechanism 4, and when the cylindrical grid is positioned in the manhole, the locking hole at the upper end of the slide rail 21 is matched with the locking mechanism 4.

During installation, the plurality of guard rails 3 are connected with the plurality of slide rails 21 to form a cylindrical grid, the manhole is protected by the cylindrical grid, the skirting board 34 increases the structural strength of the cylindrical grid, and meanwhile, the protection effect on the lower end of the cylindrical grid is achieved, and deformation caused by gravity impact is avoided.

When the device is installed, the cross bar 33 at the upper end of the vertical bar 32 is connected with the slide rail 21, the limiting rod 31 penetrates through the limiting groove 12 to be in sliding fit with the limiting groove 12, when the slide rail 21 moves up and down, the protective guard 3 moves up and down along with the slide rail, the limiting rod 31 slides along the limiting groove 12, and the limiting rod 31 limits the upward stroke of the cylindrical grid.

When the locking device is used, the operating handle 43 is pushed to drive the locking pin 42 to slide along the guide groove 44, the spring 46 is compressed, after the locking pin 42 extends out of the fixing tube 41, the operating handle 43 rotates towards one side to enter the locking groove 45, the locking pin 42 is limited to reset, and otherwise, the locking pin 42 resets; the locking pin 42 locks the cylindrical grid when it is extended out of the fixing tube 41, and releases the locking of the cylindrical grid when it is returned and retracted into the fixing tube 41.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.