A safety protection device for a slag collection platform during steep slope excavation.

Abstract

This invention relates to the field of high and steep slope excavation protection technology, and in particular to a safety protection device for a slag collection platform during high and steep slope excavation. The device includes: a support column comprising two bases, with a vertical rod threadedly connected to the center of the upper base surface of each base; a tension component fixedly connected to the upper base surface of each vertical rod; a safety net formed by several interlocking hexagonal rings, with each end connected to one of the two vertical rods; and a flexible joint. This invention uses a flexible joint to connect the safety net to the support column, enabling rapid assembly and disassembly of the safety net, reducing installation difficulty, facilitating repeated assembly and disassembly, and reducing engineering costs. The tension component in the flexible joint allows for a certain degree of tensile strength between the safety net and the support column, solving the problem of tearing at the connection point due to rockfall impacts in rigid connections, reducing maintenance costs, and preventing protective gaps caused by tearing, thus maximizing the protective strength during excavation.

Description

Technical Field

[0001] This invention relates to the field of high and steep slope excavation protection technology, and in particular to a safety protection device for a slag collection platform during high and steep slope excavation. Background Technology

[0002] The surrounding environment of the steep slope is complex, with major roads and rivers below, and villages and hydroelectric power stations nearby. Rockfalls and mudslides can damage the roads or buildings below, so it is necessary to excavate and reduce the slope for protection.

[0003] The slope excavation height is high, the original terrain is steep, and the land acquisition area is limited. It is not possible to carry out slope excavation by building access roads within the slope excavation area. During excavation, a slag collection platform is generally built at the bottom of the slope to throw the slag excavated from the upper slope along the slope surface to the slag collection platform. After the slag accumulates to a certain amount, it is transported out by slag truck.

[0004] Temporary protection is needed on the outside of the slag collection platform to prevent rocks from rolling down onto the road or buildings below and causing damage. However, traditional protective nets are troublesome to install and difficult to dismantle. In addition, the connection between the two sides of the protective net and the fixed posts is rigid, which is prone to breakage under the impact of falling rocks. This not only increases maintenance costs but also makes it easy for protective loopholes to appear. Summary of the Invention

[0005] In view of the problems existing in the safety protection devices for slag collection platforms in the excavation of steep slopes, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a safety protection device for a slag collection platform during high and steep slope excavation.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a safety protection device for a slag collection platform during high and steep slope excavation, comprising:

[0008] The support column includes two bases, with a vertical rod threadedly connected to the center of the upper base surface of each base. A tension assembly that is fixedly connected to the upper base surface of each base is also fixed to the outside of the vertical rod.

[0009] The barrier net is formed by several interlocking hexagonal rings, with each end connected to two uprights.

[0010] The swivel joint includes a connecting seat that is sleeved and fixed to the outside of the upright and several swivel buckle assemblies that are sleeved and fixed to the outermost hexagonal ring. The other end of the swivel buckle assembly is connected to a tension assembly. The tension assembly and the connecting seat are detachably and fixedly connected by a connecting assembly.

[0011] As a preferred embodiment of the safety protection device for the slag collection platform in the high and steep slope excavation of the present invention, the movable buckle assembly includes a first ring and a second ring. One side of each of the first and second rings is fixed with an adapter arm. The ends of the two adapter arms are connected by a pin. The pin located between the two adapter arms is movably sleeved with a fixing seat that is fixedly connected to one side of the tension assembly.

[0012] As a preferred embodiment of the safety protection device for the slag collection platform in the high and steep slope excavation of the present invention, the tension component includes a movable plate and a fixed plate located on one side of the movable plate, and the surface of the fixed plate is axially symmetrically provided with three sets of strip-shaped through grooves.

[0013] As a preferred embodiment of the safety protection device for the slag collection platform in the high and steep slope excavation of the present invention, a guide rod is fixed on one side of the fixed plate, and the other end of the guide rod is set through the movable plate and extends to the outside of the movable plate. A tension spring is sleeved on the outside of the guide rod.

[0014] As a preferred embodiment of the safety protection device for the slag collection platform in the high and steep slope excavation of the present invention, the connecting component includes a transmission tension member and a plug-in member that is slackly connected to the inner side of the strip groove.

[0015] As a preferred embodiment of the safety protection device for the slag collection platform in the high and steep slope excavation of the present invention, the transmission tensioning member includes a rotating rod that is vertically rotatably connected to the inner side of the connecting seat and three sets of positive and negative threads that are equidistantly opened on the rotating rod, and the positive and negative thread sections of the three sets of positive and negative threads are all threadedly connected with threaded sleeves.

[0016] As a preferred embodiment of the safety protection device for the slag collection platform in the high and steep slope excavation of the present invention, the connector includes a plug that is swivelly connected to the inside of the strip groove and a retainer disposed inside the threaded sleeve, wherein the other end of the plug is inserted into the retainer.

[0017] As a preferred embodiment of the safety protection device for the slag collection platform in the high and steep slope excavation of the present invention, the plug includes a positioning column fixed in the strip groove and a strip sleeve disposed inside the strip groove and sleeved outside the positioning column. The strip sleeve is rotatably connected to an L-shaped block, and a buckle groove is provided on the inner side of the insertion end of the L-shaped block.

[0018] As a preferred embodiment of the safety protection device for the slag collection platform in the high and steep slope excavation of the present invention, the card seat includes a slot opened on one side of the threaded sleeve, a movable joint block is rotatably connected to the inner side of the slot, and two springs are symmetrically fixedly installed near the bottom of the inner side of the slot, and two springs are symmetrically fixedly installed near the top of the inner side of the slot, and a pressing block is slidably connected to the inner side of the slot.

[0019] As a preferred embodiment of the safety protection device for the slag collection platform in the high and steep slope excavation of the present invention, the tensioning component includes a fixed sleeve that is sleeved and fixed to the outside of the upright, and four rotating seats that are symmetrically fixed to the upper surface of the base. The fixed sleeve has connecting ears fixed at the positions corresponding to the four rotating seats on its outer side, and the connecting ears are connected to the rotating seats by locking components.

[0020] The locking component includes a rotating bar rotatably connected to the connecting ear and a rotating block rotatably connected to the inner side of the rotating seat. One end of the rotating bar is fixed with a screw, and one side of the rotating block is rotatably connected with a locking block. The other end of the locking block is threadedly connected to the screw.

[0021] The beneficial effects of the present invention are as follows: The present invention uses a flexible joint to connect the fence and the support, which enables the fence to be quickly disassembled and assembled, reduces the installation difficulty, and facilitates repeated disassembly and reuse, thereby reducing project costs.

[0022] The tension component in the live joint allows the barrier and support to have a certain degree of tensile strength, which solves the problem that rigid connections are prone to tearing due to falling rocks, reduces maintenance costs, and avoids protective gaps caused by tearing, thus maximizing the protective strength during excavation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0024] Figure 1 This is a schematic diagram of the overall structure of the safety protection device for the slag collection platform in the high and steep slope excavation of the present invention.

[0025] Figure 2 This is a schematic diagram of the support column in the safety protection device for the slag collection platform of the present invention for high and steep slope excavation.

[0026] Figure 3 This is a schematic diagram of the movable joint portion in the safety protection device for the slag collection platform during the excavation of steep slopes according to the present invention.

[0027] Figure 4 This is a schematic diagram of the movable fastener component in the safety protection device for the slag collection platform during high and steep slope excavation of the present invention.

[0028] Figure 5 This is a schematic diagram of the tension component in the safety protection device for the slag collection platform during the excavation of steep slopes according to the present invention.

[0029] Figure 6 This is a schematic diagram of the connecting components in the safety protection device for the slag collection platform during the excavation of steep slopes according to the present invention.

[0030] Figure 7 This is a schematic diagram of the connector structure in the safety protection device for the slag collection platform during the excavation of steep slopes according to the present invention.

[0031] Figure 8 This is a schematic diagram of the tension component in the safety protection device for the slag collection platform of the present invention for high and steep slope excavation. Detailed Implementation

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0035] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0036] Example 1

[0037] Reference Figure 1 A schematic diagram of the overall structure of a safety protection device for a slag collection platform during steep slope excavation is provided, as shown below. Figure 1-5 A safety protection device for a slag collection platform during steep slope excavation, comprising:

[0038] The support column 100 includes two bases 101, and a vertical rod 102 is threadedly connected to the center of the upper base surface of the base 101.

[0039] Specifically, the base 101 is made of cast concrete and is embedded under the foundation of the slag collection platform to ensure the stability of the base 101;

[0040] The barrier net 200 is formed by several interlocking hexagonal rings, with its two ends connected to two uprights 102 respectively.

[0041] Specifically, the hexagonal ring is made of manganese steel, which has high strength and thus better impact resistance;

[0042] The movable joint 300 includes a connecting seat 301 that is sleeved and fixed to the outside of the upright 102 and several movable buckle assemblies 302 that are sleeved and fixed to the outermost hexagonal ring. The other end of the movable buckle assembly 302 is connected to a tension assembly 303. The tension assembly 303 and the connecting seat 301 are detachably and fixedly connected by a connecting assembly 304.

[0043] The base 101 is made of concrete poured under the foundation of the slag collection platform to ensure the stability of the base 101. The upper base surface of the base 101 is embedded with a threaded pipe. The bottom of the upright 102 has a threaded end, which is threaded and vertically fixed above the base 101. Finally, the two sides of the barrier net 200 are fixed to the upright 102 by the snap fastener assembly 302 to complete the assembly.

[0044] Furthermore, the snap fastener assembly 302 includes a first ring 302a and a second ring 302b. An adapter arm 302c is fixed to one side of both the first ring 302a and the second ring 302b. A pin 302d is connected between the ends of the two adapter arms 302c. A fixing seat 302e, which is fixedly connected to one side of the tension assembly 303, is movably sleeved on the outside of the pin 302d located between the two adapter arms 302c.

[0045] Specifically, ring 302a and ring 302b are fitted onto two adjacent sides of the hexagonal ring to form a triangular structure, which has higher connection strength.

[0046] Furthermore, the tension assembly 303 includes a movable plate 303a and a fixed plate 303b located on one side of the movable plate 303a. The surface of the fixed plate 303b is axially symmetrically provided with three sets of strip-shaped through grooves 303c.

[0047] Furthermore, a guide rod 303d is fixed to one side of the fixed plate 303b, and the other end of the guide rod 303d is set through the movable plate 303a, extending to the outside of the movable plate 303a. A tension spring 303e is sleeved on the outside of the guide rod 303d.

[0048] Specifically, a limit plate is fixed to the end of the guide rod 303d. The section of the guide rod 303d that passes through the movable plate 303a has an arc-shaped structure. Holes for the guide rod 303d to pass through are opened on the surface of the movable plate 303a. These holes are arc-shaped and fit the arc-shaped section of the guide rod 303d. When the barrier net 200 is impacted, it will pull the movable plate 303a. After being subjected to force, the movable plate 303a slides along the guide rod 303d. Since the guide rod 303d has an arc-shaped structure, the movable plate 303a also moves in an arc. The curved movement can accommodate the impact force received by the barrier net 200. When the movable plate 303a slides along the guide rod 303d, it compresses the tension spring 303e, thus creating a stretchable space between the barrier net 200 and the upright 102. This stretchable space helps to alleviate the rigid impact of the barrier net 200, solving the problem that rigid connections are prone to tearing due to falling rocks, reducing maintenance costs, and preventing protective gaps caused by tearing, thereby maximizing the protective strength during excavation.

[0049] Operation process: First, concrete is poured under the foundation of the slag collection platform to ensure the stability of the base 101. A threaded pipe is embedded in the upper base surface of the base 101. The bottom of the upright 102 has a threaded end, which is threaded and vertically fixed above the base 101. Finally, the two sides of the barrier net 200 are fixed to the upright 102 through the snap fastener assembly 302 to complete the assembly.

[0050] Ring 1 302a and ring 2 302b are fitted onto two adjacent sides of the hexagonal ring, forming a triangular structure with higher connection strength. When the barrier net 200 is impacted, it will pull the movable plate 303a. After being subjected to force, the movable plate 303a slides along the guide rod 303d. The guide rod 303d is an arc-shaped structure, which causes the movable plate 303a to also move in an arc shape. The arc-shaped movement can match the backward force of the barrier net 200 when it is impacted. When the movable plate 303a slides along the guide rod 303d, it compresses the tension spring 303e, which creates a stretchable space between the barrier net 200 and the upright 102. The stretchable space is used to alleviate the rigid impact of the barrier net 200, which solves the problem that rigid connections are prone to tearing at the connection due to falling rocks. This reduces maintenance costs and avoids protective gaps caused by tearing, maximizing the protective strength during excavation.

[0051] Example 2

[0052] Reference Figure 6-7 The difference between this embodiment and the first embodiment is that the connecting component 304 includes a transmission tension member 304a and a plug member 304b that is flexibly connected to the inside of the strip groove 303c.

[0053] Furthermore, the transmission tensioning member 304a includes a rotating rod 304a-1 that is rotatably connected to the inner side of the connecting seat 301 and three sets of positive and negative threads 304a-2 that are equidistantly opened on the rotating rod 304a-1. The positive and negative thread sections of the three sets of positive and negative threads 304a-2 are all threadedly connected with threaded sleeves 304a-3. The bottom end of the rotating rod 304a-1 is fixed with a nut 304a-4.

[0054] Specifically, the three sets of positive and negative threads 304a-2 correspond one-to-one with the three sets of strip grooves 303c. Rotating the nut 304a-4 causes the rotating rod 304a-1 to rotate. Due to the characteristics of the thread, the thread sleeve 304a-3 will be linearly displaced along the rotation direction of the thread of the rotating rod 304a-1. When the thread sleeve 304a-3 is displaced, it will drive the strip sleeve 304b-1b to move, so that the two strip sleeves 304b-1b in the same group are in a figure-eight shape, which maximizes the stability of the connection. This structure is not only stable in connection, but also convenient to disassemble and assemble, realizing the quick disassembly and assembly of the barrier net, reducing the installation difficulty, and at the same time, it is easy to disassemble and reuse, reducing the project cost.

[0055] Furthermore, the connector 304b includes a plug 304b-1 that is flexibly connected to the inside of the strip groove 303c and a retainer 304b-2 that is disposed inside the screw sleeve 304a-3, with the other end of the plug 304b-1 inserted into the retainer 304b-2.

[0056] The plug 304b-1 includes a positioning post 304b-1a fixed in the strip groove 303c and a strip sleeve 304b-1b disposed inside the strip groove 303c and sleeved outside the positioning post 304b-1a. The strip sleeve 304b-1b is rotatably connected to an L-shaped block 304b-1c. The L-shaped block 304b-1c has a snap-fit ​​groove 304b-1d on the inner side of the plug end.

[0057] Furthermore, the card holder 304b-2 includes a slot 304b-2a formed on one side of the threaded sleeve 304a-3. A movable contact block 304b-2b is rotatably connected to the inner side of the slot 304b-2a. Two springs 304b-2c are symmetrically fixedly installed on the inner side of the slot 304b-2a near the bottom position. Two springs 304b-2d are symmetrically fixed on the inner side of the slot 304b-2a near the top position. A pressing block 304b-2e is slidably connected to the inner side of the slot 304b-2a.

[0058] Specifically, the swivel block 304b-2b has a bird-shaped structure, with the bird's belly as the rotation axis and the bird's tail located above the spring 304b-2c. The bird's beak is adapted to the buckle groove 304b-1d, and the bird's beak is engaged with the buckle groove 304b-1d. When inserted, the L-shaped block 304b-1c will touch the bird's beak of the swivel block 304b-2b, causing the swivel block 304b-2b to rotate around the rotation axis at the bird's belly. During rotation, the bird's tail will compress the spring 304b-2c. As the L-shaped block 304b-1c continues to be inserted, when the buckle groove 304b-1d is at the bird's beak, the bird's beak is unrestricted. Under the reaction force of the spring 304b-2c, the swivel block 304b-2b is forced to rotate until the bird's beak is engaged with the buckle groove 304b-1d, forming a snap-fit.

[0059] The rest of the structure is the same as in Example 1.

[0060] Operation process: During connection, insert the L-shaped block 304b-1c into the slot 304b-2a. When inserted, the L-shaped block 304b-1c will touch the beak of the movable block 304b-2b, causing the movable block 304b-2b to rotate around the rotation axis at the bird's belly. During rotation, the bird's tail will compress the spring 304b-2c. As the L-shaped block 304b-1c continues to be inserted, when the buckle 304b-1d is at the beak, the beak is unrestricted. Under the reaction force of the spring 304b-2c, the movable block 304b-2b is forced to rotate until the beak is stuck in the buckle 304b-1d, forming a snap-fit.

[0061] Further rotating the nut 304a-4 causes the rotating rod 304a-1 to rotate. Due to the characteristics of the thread, the threaded sleeve 304a-3 will linearly displace along the rotation direction of the thread of the rotating rod 304a-1. When the threaded sleeve 304a-3 displaces, it will drive the strip sleeve 304b-1b to move, so that the two strip sleeves 304b-1b in the same group form an "eight" shape, which maximizes the stability of the connection. This structure is not only stable in connection, but also convenient to disassemble and assemble, realizing the quick disassembly and assembly of the barrier net, reducing the installation difficulty, and at the same time, it is easy to disassemble and reuse, reducing the project cost.

[0062] Example 3

[0063] Reference Figure 8 The difference between this embodiment and the above embodiments is that: the outside of the upright 102 is fixed with a tension assembly 103 that is fixedly connected to the base surface of the base 101;

[0064] The tensioning assembly 103 includes a fixed sleeve 103a that is sleeved and fixed to the outside of the upright 102, and four rotating seats 103b that are symmetrically fixed to the upper surface of the base 101. Connecting ears 103c are fixed on the outer side of the fixed sleeve 103a at the positions corresponding to the four rotating seats 103b. The connecting ears 103c and the rotating seats 103b are connected by locking members 103d.

[0065] Specifically, the locking component 103d includes a rotating bar 103d-1 rotatably connected to the connecting ear 103c and a rotating block 103d-2 rotatably connected to the inner side of the rotating seat 103b. One end of the rotating bar 103d-1 is fixed with a screw 103d-3, and one side of the rotating block 103d-2 is rotatably connected with a locking block 103d-4. The other end of the locking block 103d-4 is threadedly connected to the screw 103d-3.

[0066] The rest of the structure is the same as in Example 2.

[0067] Operation process: The two ends of the locking part 103d are rotatably connected to the connecting ear 103c and the rotating seat 103b respectively. After installation, the locking block 103d-4 is rotated to achieve tensile reinforcement through the thread, which provides the overall stability of the column 102.

[0068] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0069] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0070] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A kind of high steep slope excavation slag collecting platform safety protection device, it is characterized by: include: The support column (100) includes two bases (101), and a vertical rod (102) is threadedly connected to the center of the upper base surface of the base (101). A tension assembly (103) fixedly connected to the upper base surface of the base (101) is fixed to the outside of the vertical rod (102). The barrier net (200) is formed by several interlocking hexagonal rings, and its two ends are connected to two uprights (102) respectively; The swivel joint (300) includes a connecting seat (301) that is sleeved and fixed to the outside of the upright (102) and several swivel buckle assemblies (302) that are sleeved and fixed to the outermost hexagonal ring. The other end of the swivel buckle assembly (302) is connected to a tension assembly (303). The tension assembly (303) and the connecting seat (301) are detachably and fixedly connected by a connecting assembly (304). The snap fastener assembly (302) includes a first ring (302a) and a second ring (302b). One side of each of the first ring (302a) and the second ring (302b) is fixed with an adapter arm (302c). The ends of the two adapter arms (302c) are connected by a pin (302d). The pin (302d) located between the two adapter arms (302c) is movably sleeved with a fixing seat (302e) that is fixedly connected to one side of the tension assembly (303). The tension assembly (303) includes a movable plate (303a) and a fixed plate (303b) located on one side of the movable plate (303a). The surface of the fixed plate (303b) is axially symmetrically provided with three sets of strip-shaped through grooves (303c). A guide rod (303d) is fixed on one side of the fixed plate (303b), and the other end of the guide rod (303d) is provided through the movable plate (303a) and extends to the outside of the movable plate (303a). A tension spring (303e) is sleeved on the outside of the guide rod (303d). The connecting assembly (304) includes a transmission tension member (304a) and a plug member (304b) that is flexibly connected to the inside of the strip-shaped through groove (303c); The transmission tensioning member (304a) includes a rotating rod (304a-1) that is rotatably connected to the inner side of the connecting seat (301) and three sets of positive and negative threads (304a-2) that are equidistantly opened on the rotating rod (304a-1). The positive and negative thread sections of the three sets of positive and negative threads (304a-2) are all threadedly connected with threaded sleeves (304a-3). The connector (304b) includes a plug (304b-1) that is swivelly connected to the inside of the strip groove (303c) and a retainer (304b-2) disposed inside the threaded sleeve (304a-3), with the other end of the plug (304b-1) inserted into the retainer (304b-2).

2. The high and steep slope excavation slag collecting platform safety protection device according to claim 1, characterized in that: The plug (304b-1) includes a positioning post (304b-1a) fixed in the strip-shaped through groove (303c) and a strip sleeve (304b-1b) disposed inside the strip-shaped through groove (303c) and sleeved outside the positioning post (304b-1a). One end of the strip sleeve (304b-1b) is rotatably connected to an L-shaped block (304b-1c), and a snap-fit ​​groove (304b-1d) is provided on the inner side of the insertion end of the L-shaped block (304b-1c).

3. The high and steep slope excavation slag collecting platform safety protection device according to claim 2, characterized in that: The card holder (304b-2) includes a slot (304b-2a) formed on one side of the threaded sleeve (304a-3). A movable joint block (304b-2b) is rotatably connected to the inner side of the slot (304b-2a). Two springs (304b-2c) are symmetrically fixedly installed on the inner side of the slot (304b-2a) near the bottom position. Two springs (304b-2d) are symmetrically fixed on the inner side of the slot (304b-2a) near the top position. A pressing block (304b-2e) is slidably connected to the inner side of the slot (304b-2a).

4. The safety protection device for the slag collection platform during high and steep slope excavation as described in claim 3, characterized in that: The tensioning assembly (103) includes a fixed sleeve (103a) sleeved and fixed to the outside of the upright (102), and four rotating seats (103b) symmetrically fixed to the upper surface of the base (101). Connecting ears (103c) are fixed on the outside of the fixed sleeve (103a) at positions corresponding to the four rotating seats (103b). The connecting ears (103c) and the rotating seats (103b) are connected by locking members (103d). The locking component (103d) includes a rotating bar (103d-1) rotatably connected to the connecting ear (103c) and a rotating block (103d-2) rotatably connected to the inner side of the rotating seat (103b). One end of the rotating bar (103d-1) is fixed with a screw (103d-3), and one side of the rotating block (103d-2) is rotatably connected with a locking block (103d-4). The other end of the locking block (103d-4) is threadedly connected to the screw (103d-3).

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