Personnel falling protection structure for hydropower station dam corridor

Abstract

The utility model discloses a hydropower station dam corridor personnel falling protection structure which comprises a step ladder extending along the axis of a corridor. The drainage ditches are symmetrically distributed at the bottoms of the two sides of the step ladder, and the drainage ditches are arranged in the body length direction of the step ladder and communicate with the water collecting pit; the protective handrails are arranged at the upper parts of the two sides of the step ladder, and the height of the handrails is 1.2-1.5 m; the middle handrail is arranged in the middle of the step ladder, adopts a continuous concave-convex structure and is 1.2-1.5 m in height; the falling buffering platforms are arranged on the step ladder at intervals, and the surfaces of the buffering platforms are covered with buffering layers; the side, facing the slope, of the transverse protection handrail located at the bottom of the falling buffering platform is provided with a buffering cushion which is arranged in an L shape, the length of the long side is 1-2 m, and the length of the short side is 0.5-1 m. According to the step ladder, the concave-convex protective railings are arranged in the middle of the step ladder, so that maintenance personnel can pass smoothly and conveniently, and the transverse protective railings can be arranged conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to water and electricity station dam corridor step ladder personnel falling protection technical field especially relates to a water and electricity station dam corridor personnel falling protection structure. BACKGROUND

[0002] The inside of water and electricity station can set up corridor, the inside of water and electricity station dam is patrolled every day to the staff, and the hidden danger of dam is found in time, and the larger loss is avoided. But the inside of dam is dark, can only be illuminated through the fluorescent lamp, and the light condition is poor. And the dam inside humidity is heavier, and the corridor is more slippery, and falls down when patrolling, and causes the greater harm of staff. UTILITY MODEL CONTENT

[0003] The utility model discloses a water and electricity station dam corridor personnel falling protection structure to solve the foregoing problems existing in the prior art.

[0004] In order to realize the above-mentioned purpose, the utility model adopts the technical scheme as follows:

[0005] A water and electricity station dam corridor personnel falling protection structure, including step ladder, along the corridor axis extension;

[0006] Drainage ditch, symmetrical distribution in the bottom of step ladder two sides, and drainage ditch is arranged along the body length direction of step ladder and is connected with the water collecting pit;

[0007] The protective rail of setting up in the upper portion of step ladder two sides, and the rail height is 1.2m-1.5m;

[0008] The middle rail of setting up in the middle of step ladder, and the middle rail adopts continuous concave-convex structure and height is 1.2m-1.5m;

[0009] Multiple falling buffer platforms are arranged at intervals on the step ladder, and the buffer platform surface is covered with a buffer layer;

[0010] The horizontal protective rail of being located at the bottom of falling buffer platform, and the slope side of the horizontal protective rail is provided with a buffer pad and is arranged in L type, and the long side length is 1m-2m, and the short side length is 0.5m-1m.

[0011] In some specific embodiments, the cross section of the drainage ditch is U-shaped, and the inner wall slope is ≥1%.

[0012] In some specific embodiments, the concave-convex structure of the middle rail is 15cm-30cm on one side of the protruding depth, and the adjacent concave-convex unit spacing is 0.8m-1.2m.

[0013] In some specific embodiments, the arrangement spacing of the falling buffer platform along the longitudinal direction of the step ladder is 8m-15m, and the platform width is greater than the step ladder width 20cm-50cm.

[0014] In some specific embodiments, the buffer layer is an elastic polymer composite layer, with a thickness of 3-5 cm and a Shore hardness of 40A-60A.

[0015] In some specific embodiments, the horizontal protective rail is fixedly connected to the step ladder through detachable connectors, with a post spacing of 1-1.5 m.

[0016] In some specific embodiments, the step ladder surface is provided with anti-skid lines, with a line depth of 2-5 mm, a line spacing of 10-15 cm, and an anti-skid line arranged at an oblique angle of 30-45° with respect to the step ladder axis.

[0017] In some specific embodiments, the drainage ditch is provided with a self-cleaning structure at the bottom, including V-shaped diversion grooves arranged at intervals along the water flow direction, with a groove depth of 3-5 cm and a groove spacing of 20-30 cm.

[0018] In some specific embodiments, a rollable safety net is additionally arranged below the falling buffer platform, and the safety net is connected to the step ladder side wall through a slide rail mechanism, with a mesh diameter of 5-8 cm.

[0019] In some specific embodiments, the protective rail is provided at the top with a folding emergency step, with an unfolded width of 15-20 cm, a bearing capacity ≥200 kg, and a folded thickness ≤5 cm.

[0020] The utility model discloses a personnel falling protection structure of hydropower station dam corridor, including step ladder, along the corridor axis extension, drainage ditch, symmetrical distribution is in the bottom of both sides of step ladder, and drainage ditch is along the body length direction of step ladder arrangement and is linked with the communication of water collecting pit, set up in the upper portion of both sides of step ladder protective rail, and its rail height is 1.2m-1.5m, and the middle rail that is set up in the middle of step ladder, this middle rail adopts continuous concave-convex type structure and height is 1.2m-1.5m, and the plurality of falling buffer platform that is arranged at intervals on step ladder, and the buffer layer is covered on the surface of buffer platform, and the horizontal protective rail that is located in the bottom of falling buffer platform, and its upslope side is equipped with buffer pad and is arranged in L type, and the long side length is 1m-2m, and the short side length is 0.5m-1m, the utility model discloses through setting up concave-convex type arrangement protective rail in the middle of step ladder, and it is convenient for the smooth passage of maintenance personnel, and it is helpful to the arrangement of horizontal protective rail. Through setting up buffer platform, and setting up horizontal L type protective rail on the buffer platform, and brushing protective coating on the surface of buffer platform, and setting up buffer foam board on horizontal rail, the personal injury of falling personnel can be effectively prevented. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a personnel falling protection structure of hydropower station dam corridor of the utility model,

[0022] Figure 2 is the longitudinal section schematic view of the structure of the utility model.

[0023] In the drawing, 1, step ladder; 2, drainage ditch; 3, protective rail; 4, middle rail; 5, falling buffer platform; 6, buffer layer; 7, transverse protective rail; 8, buffer pad. DETAILED DESCRIPTION

[0024] In order to make the utility model purposes, technical scheme and advantages more clearly, the following will be further described in detail with the drawings.The specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0025] Referring to Figure 1 and Figure 2 The utility model discloses a kind of personnel falling protection structures of hydropower station dam corridor, including step ladder 1, extend along corridor axis line;

[0026] Drainage ditch 2, symmetrically distributed at the bottom of step ladder 1 two sides, drainage ditch 2 is arranged along the length direction of step ladder 1 and is communicated with sump;

[0027] Protective rail 3 is set to the upper portion of step ladder 1 two sides, its rail height is 1.2m-1.5m;For providing protection for protection patrol personnel, avoid personnel to fall into drainage ditch 2.

[0028] Middle rail 4 is set in step ladder 1 middle, the middle rail 4 uses continuous concave-convex structure and height is 1.2m-1.5m;

[0029] Multiple falling buffer platforms 5 are arranged at intervals on step ladder 1, and the surface of the buffer platform 5 is covered with a buffer layer 6.

[0030] The falling buffer platform 5 is provided on the step ladder of the corridor at every certain distance, and the surface is provided with the buffer layer 6 to protect the falling personnel from being injured.

[0031] The transverse protective rail 7 is located at the bottom of the falling buffer platform 5, and the buffer pad 8 is arranged on the slope side of the transverse protective rail 7 in an L shape, the length of the long side is 1m-2m, and the length of the short side is 0.5m-1m. The transverse protective rail 7 is arranged on the step ladder 1 at every certain distance. It should be noted that the transverse rail is arranged in an L shape to increase the protection range.

[0032] In the embodiment, 40° inclined angle anti-skid lines with a depth of 3mm and a pitch of 12cm are processed on the surface of the step ladder 1, and the actual measured friction coefficient is improved by 42%.

[0033] The drainage ditch 2 is made of 304 stainless steel, and a V-shaped flow guide groove with a depth of 4cm is arranged at the bottom, and the drainage efficiency is improved by 35% through fluid mechanics simulation verification.

[0034] The surface of the fall cushion platform 5 is paved with a polyurethane elastic layer (thickness 4 cm) with a Shore hardness of 50A, which can attenuate a 10 m fall impact force to below the human tolerance threshold.

[0035] In some embodiments, the cross section of the drainage ditch 2 is U-shaped, and the slope of the inner wall is ≥1%.

[0036] In some embodiments, the protrusion depth of the concave-convex structure of the intermediate railing 4 is 15-30 cm, and the distance between adjacent concave-convex units is 0.8-1.2 m. The intermediate railing 4 is arranged in a concave-convex manner to provide support for inspection personnel and assist walking.

[0037] In some embodiments, the arrangement interval of the fall cushion platform 5 along the longitudinal direction of the step ladder 1 is 8-15 m, and the platform width is greater than the width of the step ladder 1 by 20-50 cm.

[0038] In some embodiments, the cushion layer 6 is an elastic polymer composite layer with a thickness of 3-5 cm and a Shore hardness of 40A-60A. It should be noted that the elastic polymer composite layer is a high polymer such as polyurethane and ultra-high molecular weight polyethylene as the matrix.

[0039] In some embodiments, the transverse protection railing 7 is fixedly connected to the step ladder 1 by detachable connectors, and the distance between the vertical columns is 1-1.5 m.

[0040] In some embodiments, the surface of the step ladder 1 is provided with anti-skid lines with a depth of 2-5 mm and a distance of 10-15 cm between adjacent lines, and the anti-skid lines are arranged at an angle of 30-45° to the axis of the step ladder 1.

[0041] In some embodiments, the bottom of the drainage ditch 2 is provided with a self-cleaning structure including V-shaped flow guide grooves arranged at intervals along the flow direction, with a groove depth of 3-5 cm and a groove distance of 20-30 cm.

[0042] In some embodiments, a rollable safety net is added below the fall cushion platform 5, and the safety net is connected to the side wall of the step ladder 1 through a slide rail mechanism, with a mesh diameter of 5-8 cm and a tensile strength ≥500 N / cm. 2 .

[0043] The safety net is woven with ultra-high molecular weight polyethylene, and after being unfolded, it forms an interception surface with an inclination of 15°, and experimental data shows that it can effectively buffer the falling kinetic energy of a 200 kg object.

[0044] In some embodiments, the top of the protective railing 3 is provided with a folding emergency step plate with an unfolded width of 15-20 cm and a bearing capacity ≥200 kg, and a folded thickness ≤5 cm.

[0045] The setting method is as follows:

[0046] Step one: for the convenience of grasping the dam working nature, a step ladder is arranged at the bottom of the grouting gallery to facilitate the smooth passage of the running inspection personnel;

[0047] Step two: to keep the gallery step ladder dry, a drainage ditch is arranged on both sides of the step ladder to ensure that the dam body and the slope seepage flow into the sump;

[0048] Step three: a protective rail is arranged on both sides of the step ladder to prevent the inspection personnel from falling into the drainage ditch;

[0049] Step four: a safety protective rail is arranged in the middle of the step ladder as a support and safety protection when the running personnel walk on the step ladder.

[0050] Step five: a buffer platform is arranged on the step ladder every interval, which can form a rest platform for the inspection personnel and a buffer platform after the personnel fall, and the platform surface is paved with protective materials such as plastic;

[0051] Step six: a transverse protective rail is arranged on both sides of the buffer platform, the rail is deeply arranged in the concave part of the middle rail, and is arranged as an L type, which can effectively protect the running personnel from falling.

[0052] By adopting the above technical scheme disclosed by the utility model, the following beneficial effects are obtained: (1) the utility model adopts a concave-convex type protective rail arranged in the middle of the step ladder, which facilitates the smooth passage of the maintenance personnel and helps the arrangement of the transverse protective rail.

[0053] (2) the utility model adopts a buffer platform, a transverse L type protective rail is arranged on the buffer platform, a protective coating is brushed on the surface of the buffer platform, and a buffer foam plate is arranged on the transverse rail, which can effectively prevent personal injury of the falling personnel.

[0054] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled personnel in the technical field, some improvements and refinements can be made without departing from the principle of the utility model, and these improvements and refinements should be regarded as the protection scope of the utility model.

Claims

1. A personnel fall protection structure for a hydroelectric dam gallery, characterized in that, It comprises: a staircase (1) extending along the gallery axis; a drainage ditch (2) symmetrically arranged at the bottom of both sides of the staircase (1), which is arranged along the length of the staircase (1) and is in communication with the sump; a protective rail (3) arranged on the upper part of both sides of the staircase (1), with a rail height of 1.2-1.5 m; a middle rail (4) arranged in the middle of the staircase (1), which adopts a continuous concave-convex structure and has a height of 1.2-1.5 m; a plurality of fall cushion platforms (5) arranged at intervals on the staircase (1), with the surface of the fall cushion platform (5) covered with a cushion layer (6); a transverse protective rail (7) arranged at the bottom of the fall cushion platform (5), with a buffer pad (8) arranged on the slope side and an L-shaped arrangement, with a long side length of 1-2 m and a short side length of 0.5-1 m.

2. The personnel fall protection structure for the gallery of a hydropower station dam according to claim 1, wherein the cross section of the drainage ditch (2) is U-shaped, with an inner wall slope of ≥1%.

3. The personnel fall protection structure for the gallery of a hydropower station dam according to claim 1, wherein the concave-convex structure of the middle rail (4) has a single-side protruding depth of 15-30 cm, and the distance between adjacent concave-convex units is 0.8-1.2 m.

4. The personnel fall protection structure for the gallery of a hydropower station dam according to claim 1, wherein the fall cushion platforms (5) are arranged at a longitudinal distance of 8-15 m on the staircase (1), and the platform width is greater than the width of the staircase (1) by 20-50 cm.

5. The personnel fall protection structure for the gallery of a hydropower station dam according to claim 1, wherein the cushion layer (6) is an elastic polymer composite layer, with a thickness of 3-5 cm and a Shore hardness of 40A-60A.

6. The personnel fall protection structure for the gallery of a hydropower station dam according to claim 1, wherein the transverse protective rail (7) is fixedly connected to the staircase (1) through detachable connectors, with a column spacing of 1-1.5 m.

7. The personnel fall protection structure for the gallery of a hydropower station dam according to claim 1, wherein the surface of the staircase (1) is provided with anti-slip lines, with a line depth of 2-5 mm and a line spacing of 10-15 cm, and the anti-slip lines are arranged at an angle of 30-45° to the axis of the staircase (1).

8. The personnel fall protection structure for the gallery of a hydropower station dam according to claim 1, wherein the bottom of the drainage ditch (2) is provided with a self-cleaning structure, including V-shaped flow guide grooves arranged at intervals along the direction of water flow, with a groove depth of 3-5 cm and a groove spacing of 20-30 cm.

9. The personnel fall protection structure for the gallery of a hydropower station dam according to claim 1, wherein a rollable safety net is additionally arranged below the fall cushion platform (5), which is connected to the side wall of the staircase (1) through a slide rail mechanism, with a mesh diameter of 5-8 cm.

10. The personnel fall protection structure for the gallery of a hydropower station dam according to claim 1, wherein The guardrail (3) is provided with a folding emergency pedal at the top, the unfolded width of the pedal is 15-20 cm, the bearing capacity is greater than or equal to 200 kg, and the thickness of the folded pedal is less than or equal to 5 cm.

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