Safety pile casing for cast-in-situ bored pile

Abstract

The utility model discloses a cast-in-situ bored pile safety protection cylinder which comprises a protection cylinder body provided with a protection cylinder cavity and a supporting structure, a plurality of safety plates hinged to the bottom of the protection cylinder body are evenly distributed on the protection cylinder body in the circumferential direction, an annular plate composed of a plurality of arc-shaped plates is arranged on the inner side of the protection cylinder body, and the annular plate is arranged on the safety plates. A first magnetic block is arranged at the top of the outer wall of an arc-shaped plate of the annular plate, a second magnetic block is arranged at the bottom of the inner wall of the pile casing body, when the annular plate is pushed by a drill bit to press the safety plate downwards and open towards the outer side, the first magnetic block is attracted to the corresponding second magnetic block along with movement of the annular plate, and an insertion hole is formed in the middle of the second magnetic block; a push rod arranged in the radial direction is arranged in the inserting hole, and an elastic return device is further arranged between the annular plate and the pile casing body. The safety protection device can be automatically switched between a protection state and a non-protection state during construction, and can be widely applied to the technical field of safety protection of pile foundation construction.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation construction safety protection, in particular to a bored cast-in-place pile safety casing. Background Art

[0002] A utility model with an existing announcement number of CN219491794U belongs to the technical field of pile foundation construction safety protection, and specifically relates to a bored cast-in-place pile hole safety anti-fall casing, including a steel ring casing arranged at the pile hole mouth, a safety casing under the steel ring casing and related auxiliary components. By arranging a horizontal safety baffle in the middle of the casing body, and fixing it with an auxiliary plate and a safety buckle on the outer wall of the casing body, it can effectively protect the safety of construction workers around the hole and prevent the safety risk of falling. The safety baffle and the auxiliary plate can be flipped 90° around the rotating axis, and the workers can easily switch between their protection state and non-protection state during construction.

[0003] The above technical solution needs to switch between the protection state and the non-protection state during construction, and workers are also required to manually switch during construction, which still poses a great safety hazard and wastes time. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the above-mentioned background technology and provide a bored pile safety casing, which can automatically switch between its protective state and non-protective state during construction, omitting the time of manual switching and avoiding safety hazards.

[0005] The utility model provides a bored pile safety casing, comprising a casing body, the casing body comprising an upper section and a lower section, a casing cavity is arranged between the upper section and the lower section of the casing body, the casing cavity is circumferentially uniformly provided with a supporting structure supporting the upper section and the lower section, a plurality of safety plates hingedly connected to the bottom of the casing body and arranged radially are uniformly arranged along the circumferential direction at the bottom of the upper section of the casing body, an annular plate composed of a plurality of arc plates coaxially arranged therewith is arranged inside the casing body, the annular plate is coaxially arranged on the horizontally arranged safety plate, and one or more of the annular plates A first magnetic block is provided on the top of the outer wall of multiple arc-shaped plates, and a second magnetic block corresponding to the first magnetic block is provided on the bottom of the inner wall of the casing body. When the annular plate presses down the safety plate and spreads it outward under the push of the drill bit, the first magnetic block is attracted to the corresponding second magnetic block as the annular plate moves. A plug hole is provided in the middle of the second magnetic block, and a push rod arranged radially is provided in the plug hole. An elastic return device is also provided between the annular plate and the casing body. The elastic return device enables the safety plate to return to a horizontal state by pushing the push rod inward when the drill bit is lifted upward and leaves the casing body, and the annular plate moves upward and retracts inward to its original position.

[0006] In the above technical solution, the elastic return device includes a slide groove arranged on each arc plate of the annular plate and arranged in the vertical direction, the side wall of the casing body is provided with a through groove corresponding to the slide groove one by one, and each through groove of the casing body is provided with a sliding plate arranged in the radial direction, and the top of the sliding plate is provided with a limiting groove arranged in the same direction, the sliding plate and the limiting groove extend into the slide groove and are movably connected to the slide groove, a spring is fixed at the top of the slide groove, and when the spring is in a relaxed state, the sliding plate and the limiting groove are located at the bottom of the slide groove, and a limiting block is fixed at the bottom end of the spring, and the limiting block can slide up and down in the slide groove and in the limiting groove.

[0007] In the above technical solution, a roller is provided on the top of the arc-shaped plate of the annular plate, and the axial direction of the roller is arranged along the tangent direction of the arc-shaped plate of the annular plate.

[0008] In the above technical solution, the rollers are arranged in two inner and outer rows along the radial direction of the annular plate and the arc plate.

[0009] In the above technical solution, the supporting structure includes an integral annular casing shell arranged outside the casing cavity and coaxially connected thereto, the casing shell being respectively provided with an annular side wall, an annular bottom and an annular top in the shape of a truncated cone side wall, and an annular cavity is provided inside the casing shell.

[0010] In the above technical solution, an annular partition is provided between a bottom section of the upper part of the casing body and the top of the annular side wall of the casing shell, and one end of each of the push rod and the sliding plate extends into the closed space formed by the partition, the outer wall of the casing body and the annular top of the casing shell.

[0011] In the above technical solution, when all the safety plates are arranged radially along the casing body to form a radial structure, a through hole is provided at the center of the radial structure.

[0012] In the above technical solution, first magnetic blocks are respectively provided on both sides of each slide slot.

[0013] In the above technical solution, the slide groove is a groove embedded in the arc plate of the annular plate.

[0014] In the above technical solution, the annular plate is composed of two symmetrically distributed arc-shaped plates.

[0015] The utility model of bored pile safety casing has the following beneficial effects:

[0016] When the drill bit is working, the annular plate is driven to move downward, and the bottom end of the annular plate is fitted with the surface of the safety plate to drive the safety plate downward together. When the first magnetic block on the outer wall of the annular plate and the second magnetic block on the inner wall of the casing body are at the same height, they are adsorbed and fitted, so that the annular plate expands outward and fits with the casing body, which is convenient for the drill bit to continue to work downward. At the same time, when the drill bit is lifted to leave the annular plate and the safety plate, the safety plate is restored to a horizontal state through the elastic return device and the push rod, and the annular plate moves upward and retracts inward to its original position. During construction, there is no need for workers to manually switch the protection state and non-protection state of the safety casing, thereby reducing safety hazards during construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall appearance structure of the safety casing of the bored pile of the utility model;

[0018] Figure 2 It is a cross-sectional view of the overall internal structure of the safety casing of the bored pile of the utility model;

[0019] Figure 3 for Figure 2 A top view of the structure;

[0020] Figure 4 It is an enlarged structural diagram of the first angle of the elastic return device in the safety casing of the bored pile of the utility model;

[0021] Figure 5 It is a structural enlarged view of the second angle of the elastic return device in the safety casing of the bored pile of the utility model;

[0022] Figure 6 It is a schematic structural axial view of the annular plate and its accompanying structure in the safety casing of the bored pile of the utility model;

[0023] Figure 7 It is a structural cross-sectional view of the internal structure of the annular plate and the casing shell in the safety casing of the bored cast-in-place pile of the utility model;

[0024] Figure 8 for Figure 7 A magnified view of the structure at center. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but the embodiments should not be construed as limiting the present invention.

[0026] See also Figure 1The utility model of bored pile safety casing comprises a casing body 1, the casing body 1 comprises an upper section and a lower section, a casing cavity is arranged between the upper section and the lower section of the casing body 1, the casing cavity is circumferentially uniformly provided with supporting structures for supporting the upper section and the lower section, the supporting structure comprises an integral annular casing shell 2 which is externally arranged on the casing cavity side and coaxially connected thereto, the casing shell 2 is respectively provided with an annular side wall, an annular bottom and an annular top in the shape of a truncated cone side wall, and an annular cavity is arranged inside the casing shell 2. Figure 2 A section of the bottom of the upper part of the casing body 1 is evenly distributed along the circumferential direction with a plurality of safety plates 3 which are hingedly connected to the bottom of the casing body 1 and arranged radially. The inner side of the casing body 1 is provided with an annular plate 4 which is coaxially arranged therewith and is composed of a plurality of arc-shaped plates. The annular plate 4 is coaxially arranged on the horizontally arranged safety plate 3. In one or more embodiments, the annular plate 4 is composed of two symmetrically distributed arc-shaped plates. The utility model provides a bored pile safety casing, such as Figure 2-6 As shown, it includes a casing body 1, a casing shell 2 is installed on the outer side of the casing body 1, and a safety plate 3 is rotatably installed on the inner wall of the casing body 1. When all the safety plates 3 are radially arranged along the casing body 1 to form a radial structure, a through hole is provided in the center of the radial structure. An annular plate 4 is provided in the casing body 1 and is located at the top of the safety plate 3. The annular plate 4 is divided into two groups. The annular plate 4 is axially symmetrically distributed with the horizontal center line of the casing body 1 to form a circle. A first magnetic block 10 is provided on the top of the outer wall of one or more arc-shaped plates of the annular plate 4, and a second magnetic block 11 corresponding to the first magnetic block 10 is provided at the bottom of the inner wall of the casing body 1. When the annular plate 4 presses down the safety plate 3 and stretches outward under the push of the drill bit, the first magnetic block 10 is adsorbed with the corresponding second magnetic block 11 as the annular plate 4 moves. A plug hole is provided in the middle of the second magnetic block 11, and a push rod 13 arranged radially is provided in the plug hole. An elastic return device is also provided between the annular plate 4 and the casing body 1. The elastic return device enables the safety plate 3 to return to a horizontal state by pushing the push rod 13 inward when the drill bit is lifted up and leaves the casing body 1, and the annular plate 4 moves upward and retracts inward to its original position. In one or more embodiments, the elastic return device includes a slide groove 5 arranged on each arc plate of the annular plate 4 and arranged in the vertical direction, the side wall of the casing body 1 is provided with a through groove 14 corresponding to the slide groove 5, and each through groove 14 of the casing body 1 is provided with a sliding plate 7 arranged in a radial direction, and the top of the sliding plate 7 is provided with a limiting groove 8 arranged in the same direction, and the sliding plate 7 and the limiting groove 8 extend into the slide groove 5 and are movably connected to the slide groove 5. A spring 6 is fixed at the top of the slide groove 5. When the spring 6 is in a relaxed state, the sliding plate 7 and the limiting groove 8 are located at the bottom of the slide groove 5. A limiting block 9 is fixed at the bottom of the spring 6, and the limiting block 9 can slide up and down in the slide groove 5 and in the limiting groove 8. See. Figures 4 to 6, the two groups of outer walls of the annular plate 4 are provided with a slide groove 5, and the slide groove 5 is a groove embedded in the arc plate of the annular plate 4. As shown in the figure, the slide groove 5 is a groove with equal width in the axial section. In another embodiment, the slide groove 5 is divided into two parts, the width of the end of the top of the slide groove 5 close to the first magnetic block 11 is smaller, the bottom width of the slide groove 5 is larger, and the bottom end of the larger width part is slidably connected to the sliding plate 7. When the drill bit is pressed down, the annular plate 4 slides in the slide groove 5 opened on the outer wall of the annular plate 4 through the sliding plate 7. When sliding to the top of the slide groove 5, the first magnetic block 10 and the second magnetic block 11 are attracted to each other, so that the annular plate 4 at the top of the smaller slide groove 5 can better drive the sliding plate 7 to slide into the through groove 14, so that the annular plate 4, under the action of the first magnetic block 10 and the second magnetic block 11, makes the sliding plate 7 enter the casing shell 2 through the through groove 14. When the construction is completed, the worker When a person enters the casing shell 2, he pushes the push rod 13 and the sliding plate 7 to separate the annular plate 4 from the casing body 1, so that the compressed spring 6 is ejected, so that the annular plate 4 returns to its original position, which is convenient for the next use. The sliding plate 7 extends through the slide groove 5 to the inside of the annular plate 4, and the slide groove 5 is installed with a spring 6. The bottom end of the slide groove 5 is slidably connected with the sliding plate 7. The sliding plate 7 is slidably installed on the inner wall of the casing body 1 and located at the top of the safety plate 3. The inner wall of the casing body 1 and the top of the safety plate 3 are provided with a through groove 14, and the sliding plate 7 is slidably installed in the through groove 14. The surface of the sliding plate 7 is provided with a limited groove 8, and the limited block 9 is slidably connected in the limited groove 8. The top of the outer wall of the annular plate 4 is provided with a first magnetic block 10. In one or more embodiments, each slide groove 5 is provided with a first magnetic block 10 on both sides. The inner wall of the casing body 1 is provided with a second magnetic block 11, and the first magnetic block 10 and the second magnetic block 11 are completely adsorbed and attached together when they are at the same height. The annular plate 4 is fitted with the casing body 1 so that the drill bit continues to work downward. The installation position of the second magnetic block 11 is lower than the installation position of the first magnetic block 10. A roller 12 is embedded in the top of the annular plate 4. A push rod 13 is slidably inserted in the middle of the second magnetic block 11. A partition 15 is fixedly installed between the casing body 1 and the casing shell 2.

[0027] The sliding plate 7 installed on the inner wall of the casing body 1 makes the slide groove 5 on the outer wall of the annular plate 4 slide vertically downward, and the limiting groove 8 on the surface of the sliding plate 7 slides horizontally and vertically with the limiting block 9. The spring 6 in the slide groove 5 is installed on the surface of the limiting block 9. The limiting block 9 is at the bottom end of the slide groove 5, so that when the drill bit moves downward, it can better drive the annular plate 4 to move downward. When the two groups of annular plates 4 move downward, the spring 6 in the slide groove 5 and the limiting block 9 are compressed. When the first magnetic blocks 10 on the outer sides of the two groups of annular plates 4 are respectively at the same height as the second magnetic blocks 11 on the inner wall of the casing body 1, the limiting block 9 drives the annular plate 4 to move downward. The sliding plate 7 passes through the slide groove 5 to slide horizontally and vertically. When the drill bit is pressed down, the annular plate 4 slides in the slide groove 5. When sliding to the top of the slide groove 5, the first magnetic block 10 and the second magnetic block 11 are attracted to each other, so that the annular plate 4 passes through the top of the slide groove 5 with a smaller width, which can better drive the sliding plate 7 to slide into the through groove 14. As a result, the annular plate 4 is attracted to the first magnetic block 10 and the second magnetic block 11, so that the sliding plate 7 enters the casing shell 2 through the through groove 14, so that the annular plate 4 can be better expanded outward to fit the inner wall of the casing, so that the drill bit continues to work downward.

[0028] like Figure 2-6 As shown, the bottom end of the spring 6 is fixedly mounted on the surface of the limit block 9, the slide groove 5 and the sliding plate 7 slide vertically, the sliding plate 7 and the limit block 9 slide horizontally and vertically, the slide groove 5 slides vertically through the sliding plate 7, and the limit block 9 slides horizontally and vertically through the limit groove 8 in the sliding plate 7. When the annular plate 4 moves downward, the spring 6 inside the slide groove 5 is compressed by the downward horizontal and vertical sliding of the annular plate 4. When the first magnetic block 10 and the second magnetic block 11 are located at the same height for adsorption, the annular plate 4 drives the limit block 9 to slide horizontally and vertically on the sliding plate 7 through the slide groove 5, which can better expand the annular plate 4 outward and fit the inner wall of the casing.

[0029] like Figure 2-6 As shown, the first magnetic block 10 and the second magnetic block 11 are circular magnetic blocks, and the push rod 13 passes through the casing body 1 and extends to the center of the second magnetic block 11. After the drill bit is finished working, the worker pushes the push rod 13 to separate the first magnetic block 10 from the second magnetic block 11 to eject the compressed spring 6, thereby driving the annular plate 4 back to the starting position.

[0030] like Figure 4-7As shown, a roller 12 is provided on the top of the arc plate of the annular plate 4, and the axial direction of the roller 12 is arranged along the tangent direction of the arc plate of the annular plate 4. The number of rollers 12 is multiple, and in one or more embodiments, the rollers 12 are arranged in two inner and outer rows along the radial direction of the arc plate of the annular plate 4. A rubber pad is installed on the surface of the roller 12. When the drill bit is pressed down, the friction is reduced when the first magnetic block 10 and the second magnetic block 11 are adsorbed. When the drill bit presses down the annular plate 4, the bottom end of the annular plate 4 is pressed against the top of the safety plate 3. When the drill bit presses down the annular plate 4 against the safety plate 3, the roller 12 has a shock-absorbing effect on the annular plate 4, so that the annular plate 4 can be better fitted with the inner wall of the casing body 1. When the drill bit is pressed down, the roller 12 can better make the annular plate 4 move toward the inner wall of the casing body 1 and fit when the first magnetic block 10 and the second magnetic block 11 are adsorbed.

[0031] like Figure 2 , Figure 7 and Figure 8 As shown, an annular partition 15 is provided between a bottom section of the upper part of the casing body 1 and the top of the annular side wall of the casing shell 2, and one end of each of the push rod 13 and the sliding plate 7 extends into the closed space formed by the partition 15, the outer wall of the casing body 1 and the annular top of the casing shell 2. A partition 15 is installed between the casing body 1 and the casing shell 2, and a horizontal safety plate 3 is provided in the middle of the casing body 1, and the safety plate 3 corresponds to the partition 15. The push rod 13 penetrates the center of the second magnetic block 11 and the side wall of the casing body 1, and drives the safety plate 3 to flip when moving downward through the annular plate 4, so that the safety plate 3 flips to the bottom of the partition 15, so that the annular plate 4 fits with the safety plate 3 in the center of the casing. After the drill bit is finished working, the push rod 13 is pushed to separate the first magnetic block 10 from the second magnetic block 11, so that the compressed spring 6 is ejected, thereby driving the annular plate 4 back to the starting position.

[0032] like Figure 4-6 As shown, there are two first magnetic blocks 10 located on both sides of the slide slot 5, and there are two second magnetic blocks 11 located on both sides of the sliding plate 7, so that the casing body and the annular plate can fit better.

[0033] Working principle: When the rotary drilling machine is working, the drill bit presses down to drive the two groups of annular plates 4 to move downward, and the sliding plate 7 installed by sliding on the inner wall of the casing body 1 makes the slide groove 5 of the outer wall of the two groups of annular plates 4 slide vertically downward. When the bottom ends of the two groups of annular plates 4 fit with the safety plate 3, the two groups of annular plates 4 continue to move downward, thereby driving the safety plate 3 to flip, and at the same time compressing the spring 6 in the slide groove 5 and the limit block 9 in the limit groove 8. When the first magnetic block 10 and the second magnetic block 11 are at the same height for adsorption, the annular plate 4 passes through the slide groove 5 and the top roller 12 through the limit block 9 to slide horizontally, so that the annular plate 4 fits against the casing body 1. When the drill bit is pressed down, the annular When the plate 4 slides in the slide groove 5 and slides to the top of the slide groove 5, the first magnetic block 10 and the second magnetic block 11 are attracted to each other, and the sliding plate 7 can be better driven to slide into the through groove 14, so that the annular plate 4 is attracted to the first magnetic block 10 and the second magnetic block 11, so that the sliding plate 7 enters the casing shell 2 through the through groove 14, and the drill bit continues to work downward, reducing the safety hazard of manual switching of the safety plate 3 by the staff during construction. When the construction is completed, the casing shell 2 is entered to separate the annular plate 4 from the casing body 1 by pushing the push rod 13 and the sliding plate 7, so that the compressed spring 6 is ejected, so that the annular plate 4 returns to its original position for easy use next time.

[0034] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0035] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A bored pile safety casing, comprising a casing body (1), characterized in that: The casing body (1) comprises an upper section and a lower section, a casing cavity is provided between the upper section and the lower section of the casing body (1), and a supporting structure for supporting the upper section and the lower section is evenly distributed in the circumferential direction of the casing cavity, a plurality of safety plates (3) are evenly distributed in the circumferential direction at the bottom of the upper section of the casing body (1) and are hingedly connected to the bottom of the casing body (1) and are arranged radially, an annular plate (4) is provided on the inner side of the casing body (1) and is coaxially arranged therewith and is composed of a plurality of arc-shaped plates, the annular plate (4) is coaxially arranged on the horizontally arranged safety plate (3), one or more arc-shaped plates of the annular plate (4) are provided with a first magnetic block (10) at the top of the outer wall, and the casing body (1) is provided with a plurality of arc-shaped plates. ) A second magnetic block (11) corresponding to the first magnetic block (10) is provided at the bottom of the inner wall. When the annular plate (4) presses down the safety plate (3) and stretches outward under the push of the drill bit, the first magnetic block (10) is attracted to the corresponding second magnetic block (11) as the annular plate (4) moves. A plug hole is provided in the middle of the second magnetic block (11). A push rod (13) is provided in the plug hole along the radial direction. An elastic return device is also provided between the annular plate (4) and the casing body (1). The elastic return device enables the safety plate (3) to return to a horizontal state by pushing the push rod (13) inward when the drill bit is lifted up and leaves the casing body (1), and causes the annular plate (4) to move upward and retract inward to its original position.

2. The bored pile safety casing according to claim 1, characterized in that: The elastic return device comprises a slide groove (5) arranged on each arc plate of the annular plate (4) and arranged in the vertical direction, a through groove (14) corresponding to the slide groove (5) is arranged on the side wall of the casing body (1), and a sliding plate (7) arranged in the radial direction is arranged in each through groove (14) of the casing body (1), and a limiting groove (8) arranged in the same direction as the sliding plate (7) is arranged on the top of the sliding plate (7), and the sliding plate (7) and the limiting groove (8) extend into the slide groove (5) and are movably connected with the slide groove (5), and a spring (6) is fixed on the top of the slide groove (5), and when the spring (6) is in a relaxed state, the sliding plate (7) and the limiting groove (8) are located at the bottom of the slide groove (5), and a limiting block (9) is fixed at the bottom end of the spring (6), and the limiting block (9) can slide up and down in the slide groove (5) and in the limiting groove (8).

3. The bored pile safety casing according to claim 2, characterized in that: A roller (12) is provided on the top of the arc-shaped plate of the annular plate (4), and the axial direction of the roller (12) is arranged along the tangent direction of the arc-shaped plate of the annular plate (4).

4. The bored pile safety casing according to claim 3 is characterized by: The rollers (12) are arranged in two inner and outer rows along the radial direction of the arc-shaped plate of the annular plate (4).

5. The bored pile safety casing according to claim 4 is characterized in that: The support structure comprises an integral annular casing shell (2) arranged outside the casing cavity and coaxially connected thereto, the casing shell (2) being respectively provided with an annular side wall, an annular bottom and an annular top in the shape of a truncated cone side wall, and an annular cavity being provided inside the casing shell (2).

6. The bored pile safety casing according to claim 5, characterized in that: An annular partition (15) is provided between a bottom section of the upper part of the casing body (1) and the top of the annular side wall of the casing shell (2), and one end of each of the push rod (13) and the sliding plate (7) extends into a closed space formed by the partition (15), the outer wall of the casing body (1) and the annular top of the casing shell (2).

7. The bored pile safety casing according to claim 6, characterized in that: When all the safety plates (3) are arranged radially along the casing body (1) to form a radial structure, a through hole is provided at the center of the radial structure.

8. The bored pile safety casing according to claim 7, characterized in that: First magnetic blocks (10) are respectively provided on both sides of each slide groove (5).

9. The bored pile safety casing according to claim 8, characterized in that: The slide groove (5) is a groove embedded in the arc plate of the annular plate (4).

10. The bored pile safety casing according to claim 9, characterized in that: The annular plate (4) is composed of two symmetrically distributed arc-shaped plates.

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