A guardrail shielding device for foundation pit

Abstract

The invention discloses a guardrail shielding device for a foundation pit, and relates to the technical field of foundation pit guardrail shielding, including a protection frame, the protection frame is provided with a rectangular opening, and a plurality of fixed rods are arranged in a linear array along the length direction of the rectangular opening, a connecting shaft is arranged in the rectangular opening, a support rod is arranged between two adjacent fixed rods, and the plurality of support rods are rotatably connected to the connecting shaft, and the upper and lower parts of the support rod based on the connecting shaft are connected with a buffer component 1, and the buffer component 1 is connected to the protection frame at one side away from the support rod, and the support rod is hinged with a protection plate 1 at the upper and lower ends along the axis, and a plurality of groups of protection rods 1 are fixedly connected to a lower side of the protection plate, and a protection plate 2 is arranged below the protection plate 1, and a groove 3 is provided on the protection plate 2 corresponding to the protection rod 1, and the protection rod 1 is slidably connected to the groove 3. The invention has the characteristic of improving the shielding effect of the guardrail.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit guardrail shielding, and in particular to a guardrail shielding device for a foundation pit. Background Art

[0002] The foundation pit is an earth pit excavated at the foundation design location according to the base elevation and foundation plane dimensions. The foundation pit guardrail is one of the indispensable safety facilities in construction projects. Its main function is to establish a safety barrier around the construction site to ensure the safety of on-site workers and the surrounding environment.

[0003] However, single-sided guardrail nets are often used to protect foundation pits, which have poor protective effects and are prone to tilting, tipping, missing and deformation under the impact of foreign objects.

[0004] Therefore, it is necessary to design a guardrail shielding device for foundation pits that can improve the shielding and protection effect of the guardrail. Summary of the invention

[0005] The object of the present invention is to provide a guardrail shielding device for a foundation pit to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a guardrail shielding device for foundation pits, comprising a protection frame, the protection frame is provided with a rectangular opening, a plurality of fixing rods are arranged in a linear array along the length direction of the rectangular opening, a connecting shaft is provided in the rectangular opening, a supporting rod is provided between each of two adjacent fixing rods, and the plurality of supporting rods are rotatably connected to the connecting shaft;

[0007] The upper and lower parts of the support rod based on the connecting axis as the center are both connected with a buffer component 1, and the side of the buffer component 1 away from the support rod is connected to the protection frame, and the upper and lower ends of the support rod along the axis are hinged with a protective plate 1, and a plurality of groups of protective rods 1 are fixedly connected to the lower side of the protective plate, and a protective plate 2 is arranged below the protective plate 1, and a groove 3 is opened on the protective plate 2 corresponding to the protective rod 1, and the protective rod 1 is slidably connected to the groove 3;

[0008] A plurality of groups of protection rods 2 are fixedly connected to one side of the protection plate 2 away from the groove 3, and a protection plate 3 is fixedly connected to one end of the protection rod 2 away from the protection plate 2;

[0009] The fixing rod is connected with a buffer component 2 at the lower part based on the connecting shaft as the center, and the side of the buffer component 2 away from the fixing rod is connected with the protective plate 3, and the protective frame is provided with a buffer component 3, and the side of the buffer component 3 away from the protective frame is connected with the protective plate 3;

[0010] A protective plate connected to the lower part of the support rod is slidably connected to a fixing plate on one side away from the protective frame, and a plurality of groups of circular holes are formed on the fixing plate.

[0011] According to the above technical solution, a groove 1 is provided on the protective frame, and the buffer assembly 1 includes a slider 1, a telescopic rod 1 and a fixing block 1;

[0012] The upper and lower parts of the support rod are respectively provided with a slide groove 1 on the semi-cylindrical part of one side corresponding to the groove 1, and the slider 1 is slidably connected with the slide groove 1;

[0013] The slide block 1 is hinged to the telescopic rod 1, one end of the telescopic rod 1 away from the slide block 1 is hinged to the fixed block 1, and the fixed block 1 is fixedly connected in the groove 1.

[0014] According to the above technical solution, the buffer assembly 2 includes a slider 2, a connecting rod 1, a connecting block 1 and a telescopic rod 2;

[0015] The fixing rod is provided with a slide groove 2 at the lower part based on the connecting axis as the center, the sliding block 2 is slidably connected to the slide groove 2, the sliding block 2 is hinged to the connecting rod 1, the end of the connecting rod 1 away from the sliding block 2 is hinged to the connecting block 1, the sliding block 2 is fixedly connected to the telescopic rod 2, the end of the telescopic rod 2 away from the sliding block 2 is fixedly connected in the slide groove 2, and the side of the protective plate 3 close to the protective frame is fixedly connected to the connecting block 1.

[0016] According to the above technical solution, the buffer assembly three includes a connecting column, a telescopic rod three and a clamping block;

[0017] Two groups of grooves five are provided on the front sides of both sides along the length direction of the protective frame, and the two groups of grooves five are symmetrically arranged with respect to the center line of the protective frame along the height direction. The connecting column is fixedly connected to the inner wall of the groove five on one side close to the center of the height direction of the protective frame, the connecting column is hinged to the telescopic rod three, and the telescopic rod three is hinged to the clamping block on the side away from the connecting column, and the clamping block is provided with a clamping slot.

[0018] According to the above technical solution, a buckle assembly is provided between the protective plate 1, the protective plate 2 and the protective plate 3 and the protective frame;

[0019] The two ends of the protective plate one, protective plate two and protective plate three along the length direction are fixedly connected with the male joints of the snap assembly, and the male head of the snap assembly corresponding to the protective frame is provided with a groove six, and the female joint matching with the male joint of the bayonet assembly is fixedly connected in the groove six.

[0020] According to the above technical solution, a slide groove 3 is provided on one side of the fixed plate close to the protective plate 1, and the protective plate 1 is slidably limitedly connected to the slide groove 3;

[0021] A plurality of connection blocks 2 are fixedly connected to the upper side of the fixing plate, a telescopic rod 4 is hinged on the connection block 2, a connection block 3 is hinged on the side of the telescopic rod 4 away from the connection block 2, and the connection block 3 is fixedly connected to the protective frame.

[0022] According to the above technical solution, a support plate is fixedly connected to the lower side of the protective frame, and universal wheels are fixedly connected to the four corners of the lower side of the support plate.

[0023] According to the above technical solution, the protective frame is fixedly connected with connecting blocks four on both sides along the length direction, and the connecting blocks four are provided with round holes two. The connecting blocks four on both sides of the protective frame are arranged alternately, so that two adjacent protective frames can cooperate up and down through the connecting blocks four.

[0024] According to the above technical solution, warning signs are painted on the protective plate 1, protective plate 2, protective plate 3, protective rod 1 and protective rod 2.

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention improves the shielding and protection effect of the guardrail by providing the first guard plate, the second guard plate, the third guard plate, the first guard bar and the second guard bar;

[0026] By arranging the buffer component 1, the buffer component 2 and the buffer component 3 to support the protective plate 1, the protective plate 2 and the protective plate 3, the buffering effect of the guardrail against the impact of external objects is improved;

[0027] The buffer component 1, the buffer component 2 and the support rod are stored by arranging the slide groove 1 and the slide groove 2, thereby reducing the overall volume of the device, and universal wheels are arranged to facilitate the movement and transportation of the guardrail;

[0028] The overall stability of the device is improved by fixing the guardrail with a fixing plate and a round hole;

[0029] By providing the connection block four and the round hole two, it is convenient to connect the guardrails. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0031] Figure 1 It is a schematic diagram of the overall right front side top view of the structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the overall right rear side top view of the structure of the present invention;

[0033] Figure 3 It is a schematic diagram of the related structures of the protection frame and the support rod of the present invention;

[0034] Figure 4 It is a schematic diagram of the related structure of the support rod and the protective plate of the present invention;

[0035] Figure 5 It is a schematic diagram of the support rod structure of the present invention;

[0036] Figure 6 It is a schematic diagram of the three related structures of the fixing rod and the protection plate of the present invention;

[0037] Figure 7 It is a schematic diagram of the support rod structure of the present invention;

[0038] Figure 8 It is a schematic diagram of the related structures of the protective plate 1, the protective plate 2 and the protective plate 3 of the present invention;

[0039] Fig. 9 It is a schematic diagram of the related structures of the protection frame and the fixing plate of the present invention;

[0040] In the figure: 1, protective frame; 2, rectangular opening; 3, fixed rod; 4, connecting shaft; 5, support rod; 6, groove 1; 7, slide groove 1; 8, slider 1; 9, limit groove 1; 10, bump 1; 11, telescopic rod 1; 12, fixed block 1; 13, connecting plate; 14, protective plate 1; 15, groove 2; 16, protective rod 1; 17, protective plate 2; 18, groove 3; 19, protective rod 2; 20, slide groove 2; 21, groove 4; 22, limit groove 2; 23, Slider 2; 24, protrusion 2; 25, connecting rod 1; 26, connecting block 1; 27, telescopic rod 2; 28, groove 5; 29, connecting column; 30, telescopic rod 3; 31, clamping block; 32, clamping groove; 33, fixing plate; 34, round hole 1; 35, connecting block 2; 36, telescopic rod 4; 37, connecting block 3; 38, supporting plate; 39, universal wheel; 40, connecting block 4; 41, round hole 2; 42, protective plate 3; 43, slide groove 3; 44, groove 6. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1-9 The present invention provides a technical solution: a guardrail shielding device for a foundation pit, comprising a protective frame 1, the protective frame 1 is provided with a rectangular opening 2, a plurality of fixing rods 3 are arranged in a linear array along the length direction of the rectangular opening 2, the fixing rods 3 are vertically arranged and the two ends along the axis direction thereof are fixedly connected to the inner wall of the rectangular opening 2;

[0043] A connecting shaft 4 is horizontally arranged at the center of the rectangular opening 2 along its height direction. The two ends of the connecting shaft 4 along the axial direction are fixedly connected to the inner wall of the rectangular opening 2. The connecting shaft 4 passes through the middle positions of the axial directions of several fixing rods 3 and is fixedly connected to the fixing rods 3.

[0044] A support rod 5 is provided between two adjacent fixed rods 3, and a connecting shaft 4 passes through the middle of the axis direction of the plurality of support rods 5, and the support rod 5 is rotatably connected to the connecting shaft 4, so that the support rod 5 rotates around the connecting shaft 4, and specifically, the support rod 5 can rotate 30° counterclockwise around the connecting shaft 4;

[0045] The length of the support rod 5 is greater than the height of the rectangular opening 2. Therefore, a groove 6 is provided on the protective frame 1 at the excess part corresponding to the two ends of the axis of the support rod 5 to store the support rod 5 when the support rod 5 is in a vertical state.

[0046] like Figure 3 , Figure 4 , Figure 5 The upper and lower parts of the support rod 5 based on the connecting shaft 4 as the center are both connected with a buffer component 1, and the side of the buffer component 1 away from the support rod 5 is connected to the protective frame 1, and the buffer component 1 includes a slider 8, a telescopic rod 11 and a fixed block 12;

[0047] The support rod 5 is provided with a slide groove 7 at both the upper and lower parts based on the connecting shaft 4 as the center, wherein the slide grooves 7 at the upper and lower parts of the support rod 5 are both provided at a semi-cylindrical part of one side of the support rod 5 close to the groove 6;

[0048] The slider 8 slides in the slide groove 7. The inner walls on both sides of the slide groove 7 are provided with limit grooves 9. The slider 8 is fixedly connected with a protrusion 10 corresponding to the limit groove 9. The protrusion 10 cooperates with the limit groove 9, so that the slider 8 can slide in the slide groove 7 within a limited position.

[0049] The slider 8 is hinged to the telescopic rod 11, and the end of the telescopic rod 11 away from the slider 8 is hinged to the fixed block 12. The fixed block 12 is fixedly connected in the groove 6. When the support rod 5 is in a vertical state, the fixed block 12 is located in the slide groove 7 to prevent the support rod 5 from colliding with the fixed block 12.

[0050] When the support rod 5 rotates counterclockwise, the maximum length of the telescopic rod 11 can prevent the support rod 5 from rotating further after rotating counterclockwise to 30°, thereby maintaining the support rod 5 in a fixed posture reversed by 30°. At this time, the angle between the telescopic rod 11 and the support rod 5 is 90°, and the slider 8 slides to the end of the limit slot 9, thereby improving the supporting effect of the telescopic rod 11 on the support rod 5 and facilitating the subsequent rotation and retraction of the support rod 5.

[0051] Two connecting plates 13 are hinged at both ends of the support rod 5 along the axial direction. A protective plate 14 is provided at one end of the two connecting plates 13 away from the support rod 5. A groove 2 15 is provided on the side of the protective plate 14 close to the support plate 38 corresponding to the connecting plate 13. The end of the connecting plate 13 away from the support rod 5 is located in the groove 2 15 and is hinged to the protective plate 14.

[0052] like Figure 8 A plurality of groups of protection rods 16 are fixedly connected to the lower side of the protection plate 14 connected to the upper part of the support rod 5 , and the plurality of groups of protection rods 16 are arranged in a linear array along the length direction of the protection plate 14 .

[0053] A second protective plate 17 is disposed below the first protective plate 14 . A third groove 18 is formed on the second protective plate 17 corresponding to the first protective rod 16 . The first protective rod 16 is slidably connected to the third groove 18 .

[0054] A plurality of groups of protection rods 19 are fixedly connected to one side of the protection plate 17 away from the groove 18 . The plurality of groups of protection rods 19 are arranged in a linear array along the length direction of the protection plate 17 . A protection plate 3 42 is fixedly connected to one end of the protection rods 19 away from the protection plate 17 .

[0055] like Figure 3 , Figure 6 , Figure 7 The lower part of the fixed rod 3 based on the connecting shaft 4 is connected with a buffer component 2, and the side of the buffer component 2 away from the fixed rod 3 is connected to the protective plate 3 42, and the buffer component 2 includes a slider 23, a connecting rod 1 25, a connecting block 1 26 and a telescopic rod 27;

[0056] The fixing rod 3 is provided with a second slide groove 20 at the lower part based on the connecting shaft 4 as the center. The second slide groove 20 is provided at a semi-cylindrical part of one side of the fixing rod 3 close to the protective plate 3 42. The protective frame 1 is provided with a fourth groove 21 corresponding to the second slide groove 20. The fourth groove 21 is located at the lower end of the second slide groove 20 and is connected to the second slide groove 20.

[0057] The inner walls on both sides opposite to each other in the second slide groove 20 are provided with a limiting groove 22, and the second slider 23 slides in the second slide groove 20. The second slider 23 is fixedly connected with a protrusion 24 corresponding to the limiting groove 22. The protrusion 24 cooperates with the limiting groove 22, so that the second slider 23 slides in the second slide groove 20 within a limited position.

[0058] The slider 23 is hinged to the connecting rod 1 25, the side of the protective plate 3 42 close to the protective frame 1 is fixedly connected to the connecting block 1 26, and the end of the connecting rod 1 25 away from the slider 23 is hinged to the connecting block 1 26;

[0059] The upper side of the second slider 23 is fixedly connected to the second telescopic rod 27, and one end of the second telescopic rod 27 away from the second slider 23 is fixedly connected in the second slide groove 20;

[0060] When the support rod 5 is in a vertical state, the protective plate 1 14 and the protective plate 2 17 and the protective plate 3 42 connected to the protective plate 1 14 fit with the protective frame 1, so that the connecting block 1 26 is located in the groove 4 21;

[0061] The connecting rod 25 has a fixed length. When the support rod 5 rotates counterclockwise, the length of the connecting rod 25 can prevent the support rod 5 from rotating further after rotating counterclockwise to 30°, thereby maintaining the support rod 5 in a fixed posture of 30° reversed. At this time, the angle between the connecting rod 25 and the fixed rod 3 is 60°, and the slider 2 23 slides to the end of the limit slot 22 under the pressure of the telescopic rod 27, thereby ejecting the protective plate 3 42, and cooperating with the protective plate 1 14 and the protective plate 2 17 for protective shielding.

[0062] like Figure 8 A buffer component 3 is provided on the protective frame 1, and the side of the buffer component 3 away from the protective frame 1 is connected to the protective frame 1, and the buffer component 3 includes a connecting column 29, a telescopic rod 30 and a block 31;

[0063] Two groups of grooves 5 28 are provided on the front sides of both sides along the length direction of the protective frame 1. The two groups of grooves 5 28 are symmetrically arranged with respect to the center line of the protective frame 1 along the height direction. A connecting column 29 is fixedly connected to the inner wall of the groove 5 28 on one side close to the center of the height direction of the protective frame 1. The connecting column 29 is hinged to the telescopic rod 3 30. The telescopic rod 30 is hinged to the block 31 on the side away from the connecting column 29. The block 31 is provided with a slot 32. The slot 32 is used to be clamped on the protective plate 2 17, so that the telescopic rod 30 supports the protective plate 2 17.

[0064] The protective plate 1 14 , the protective plate 2 17 , and the protective plate 3 42 are connected to the protective frame 1 via a buckle assembly (not shown in the figure), which is an existing conventional buckle connection assembly;

[0065] Both ends of the protective plate 14, the protective plate 2 17 and the protective plate 3 42 along the length direction are fixedly connected with male connectors of the buckle assembly (not shown in the figure), and the protective frame 1 is provided with a groove 6 44 corresponding to the male head of the buckle assembly, and a female connector (not shown in the figure) matching with the male connector of the bayonet assembly is fixedly connected in the groove 6 44;

[0066] The protective plate 1 14 , the protective plate 2 17 and the protective plate 3 42 are buckled onto the protective frame 1 through a buckle assembly, so as to facilitate folding and transportation.

[0067] like Fig. 9A fixing plate 33 is provided on the side of the protection plate 14 connected to the lower part of the support rod 5 away from the protection frame 1, and a sliding groove 3 43 is provided on the side of the fixing plate 33 close to the protection plate 14, and the protection plate 14 is slidably limitedly connected to the sliding groove 3 43;

[0068] A plurality of groups of circular holes 34 are provided on one side of the fixing plate 33 away from the slide groove 3 43 . The plurality of groups of circular holes 34 are arranged in a linear array along the length direction of the fixing plate 33 . Fixed anchor bolts are provided in the circular holes 34 . The fixed anchor bolts are inserted through the circular holes 34 into the foundation to fix the fixing plate 33 .

[0069] A plurality of connection blocks 35 are fixedly connected to the upper side of the fixing plate 33. The plurality of connection blocks 35 are arranged in a linear array along the length direction of the fixing plate 33 and are arranged alternately with the circular holes 34.

[0070] A telescopic rod four 36 is hinged on the connecting block two 35 , and a connecting block three 37 is hinged on the side of the telescopic rod four 36 away from the connecting block two 35 , and the connecting block three 37 is fixedly connected to the protective frame 1 .

[0071] A support plate 38 is fixedly connected to the lower side of the protection frame 1. When the protection plate 1 14, the protection plate 2 17, and the protection plate 3 42 are attached to the protection frame 1, the support plate 38 supports the protection plate 1 14 and the fixed plate 33.

[0072] like Figure 1 Universal wheels 39 are fixedly connected to the four corners of the lower side of the support plate 38 to facilitate the movement and transportation of the entire device. When the entire device is moved, it can be locked and fixed by stepping on the locking device of the universal wheel 39, which is an existing universal wheel 39 locking device.

[0073] The protective frame 1 is fixedly connected to two sides along the length direction with connection blocks 40, and the connection blocks 40 are provided with round holes 41;

[0074] The connecting blocks 40 on both sides of the protective frame 1 are arranged in an alternating manner, so that two adjacent protective frames 1 are matched up and down through the connecting blocks 40, the circular holes 41 are connected up and down, and the fixing anchor bolts are inserted into the circular holes 41 and fixed on the base to complete the connection between the two protective frames 1.

[0075] Warning signs are painted on the guard plate 1 14 , the guard plate 2 17 , the guard plate 3 42 , the guard bar 1 16 , and the guard bar 2 19 .

[0076] In this embodiment, in the initial state, the protective plate 1 14, the protective plate 2 17, and the protective plate 3 42 are in a state of being attached to the protective frame 1. After the device is moved to a specified position by the universal wheel 39, the universal wheel 39 is locked and fixed by the locking device provided by the universal wheel 39.

[0077] Then, the protective plate 1 14, the protective plate 2 17 and the protective plate 3 42 are pulled out, so that the support rod 5 is passively rotated 30° counterclockwise. Under the elastic support of the telescopic rod 1 11, the support rod 5 maintains a fixed posture, so that the position of the protective plate 1 14 is fixed;

[0078] At the same time, under the elastic support of the telescopic rod 27, the connecting rod 1 25 supports the protective plate 3 42, so that the position of the protective plate 3 42 is fixed;

[0079] Rotate the telescopic rod 30 to make the slot 32 of the clamping block 31 clamp the second protective plate 17, so that the telescopic rod 30 supports the third protective plate 42;

[0080] The protective plate 14 is supported by the telescopic rod 11, the protective plate 2 17 is supported by the telescopic rod 30, the protective plate 3 42 is supported by the telescopic rod 27, and the protective plate 14, the protective plate 2 17 and the protective plate 3 42 are connected into a whole by the protective rod 16 and the protective rod 2 19;

[0081] When an external object collides with the device, it is resisted and the pressure is distributed through the protective plate 1 14, the protective plate 2 17, the protective plate 3 42, the protective rod 1 16 and the protective rod 2 19;

[0082] The pressure transmitted by the protective plate 14, the protective plate 2, the protective plate 3, and the protective plate 42 is buffered by the telescopic rod 1 11, the telescopic rod 27, and the telescopic rod 3 30, so as to protect the overall stability and service life of the device.

[0083] After the support rod 5 passively rotates, the fixing plate 33 slidably connected to the protective plate 14 connected to the lower part of the support rod 5 is slid, so that the lower side of the fixing plate 33 is in direct contact with the foundation, and then the fixing anchor bolt is manually passed through the circular hole 134 and driven into the foundation to fix the fixing plate 33, thereby enhancing the stability of the protective frame 1. At the same time, the telescopic rod 4 36 supports the protective frame 1, thereby improving the overall stability of the device.

[0084] Then move the second protection frame 1 and connect it with the connection block 40 of the first protection frame 1 through the connection block 40, so that the circular holes 41 on the adjacent connection blocks 40 of the two protection frames 1 are connected to each other, and then manually pass the fixing anchor bolts through the circular holes 41 and drive them into the foundation to fix the fixing plate 33;

[0085] Repeat the above operation to connect and fix multiple protection frames 1, so as to improve the overall connectivity of the protection frames 1.

[0086] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0087] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A guardrail shielding device for a foundation pit, comprising a protective frame (1), characterized in that: The protective frame (1) is provided with a rectangular opening (2), a plurality of fixing rods (3) are arranged in a linear array along the length direction of the rectangular opening (2), a connecting shaft (4) is provided in the rectangular opening (2), a supporting rod (5) is provided between each of two adjacent fixing rods (3), and the plurality of supporting rods (5) are rotatably connected to the connecting shaft (4); The support rod (5) is connected to a buffer component 1 at both upper and lower parts based on the connecting shaft (4) as the center. The buffer component 1 is connected to the protective frame (1) at a side away from the support rod (5). The support rod (5) is hinged with a protective plate 1 (14) at both upper and lower ends along the axis. A plurality of groups of protective rods 1 (16) are fixedly connected to the lower side of the protective plate 1 (14). A protective plate 2 (17) is arranged below the protective plate 1 (14). A groove 3 (18) is provided on the protective plate 2 (17) corresponding to the protective rod 1 (16). The protective rod 1 (16) is slidably connected to the groove 3 (18). A plurality of groups of second protective rods (19) are fixedly connected to one side of the second protective plate (17) away from the third groove (18), and a third protective plate (42) is fixedly connected to one end of the second protective rod (19) away from the second protective plate (17); The fixing rod (3) is connected to a buffer component 2 at its lower part based on the connecting shaft (4) as the center, and the side of the buffer component 2 away from the fixing rod (3) is connected to a protective plate 3 (42), and the protective frame (1) is provided with a buffer component 3, and the side of the buffer component 3 away from the protective frame (1) is connected to a protective plate 3 (42); A protective plate (14) connected to the lower part of the support rod (5) is slidably connected to a fixing plate (33) on a side away from the protective frame (1), and a plurality of groups of circular holes (34) are formed on the fixing plate (33); The buffer assembly 1 comprises a slide block 1 (8), a telescopic rod 1 (11) and a fixed block 1 (12); The buffer assembly 2 comprises a slide block 2 (23), a connecting rod 1 (25), a connecting block 1 (26) and a telescopic rod 2 (27); The buffer assembly three comprises a connecting column (29), a telescopic rod three (30) and a clamping block (31).

2. A guardrail shielding device for foundation pit according to claim 1, characterized in that: The protective frame (1) is provided with a groove 1 (6); The upper and lower parts of the support rod (5) are respectively provided with a sliding groove (7) on one side of the semi-cylindrical part close to the groove (6), and the sliding block (8) is slidably connected to the sliding groove (7); The slide block 1 (8) is hinged to the telescopic rod 1 (11), and one end of the telescopic rod 1 (11) away from the slide block 1 (8) is hinged to the fixed block 1 (12), and the fixed block 1 (12) is fixedly connected in the groove 1 (6).

3. A guardrail shielding device for foundation pit according to claim 2, characterized in that: The fixing rod (3) is provided with a second slide groove (20) at the lower part based on the connecting shaft (4) as the center, the second slider (23) is slidably connected to the second slide groove (20), the second slider (23) is hinged to the first connecting rod (25), the end of the first connecting rod (25) away from the second slider (23) is hinged to the first connecting block (26), the second slider (23) is fixedly connected to the second telescopic rod (27), the end of the second telescopic rod (27) away from the second slider (23) is fixedly connected in the second slide groove (20), and the side of the third protective plate (42) close to the protective frame (1) is fixedly connected to the first connecting block (26).

4. A guardrail shielding device for foundation pit according to claim 3, characterized in that: Two groups of grooves five (28) are provided on the front sides of both sides along the length direction of the protective frame (1), and the two groups of grooves five (28) are symmetrically arranged with respect to the center line of the protective frame (1) along the height direction. The connecting column (29) is fixedly connected to the inner wall of the groove five (28) on a side close to the center of the height direction of the protective frame (1), and the connecting column (29) is hinged to the telescopic rod three (30). The side of the telescopic rod three (30) away from the connecting column (29) is hinged to the clamping block (31), and the clamping block (31) is provided with a clamping slot (32).

5. A guardrail shielding device for foundation pit according to claim 4, characterized in that: A buckle assembly is provided between the protective plate 1 (14), the protective plate 2 (17) and the protective plate 3 (42) and the protective frame (1); The two ends of the protective plate 1 (14), the protective plate 2 (17) and the protective plate 3 (42) along the length direction are fixedly connected with male joints of the snap assembly, and a groove 6 (44) is provided on the protective frame (1) corresponding to the male head of the snap assembly, and a female joint matching the male joint of the snap assembly is fixedly connected in the groove 6 (44).

6. A guardrail shielding device for foundation pit according to claim 5, characterized in that: A slide groove three (43) is provided on one side of the fixed plate (33) close to the protective plate one (14), and the protective plate one (14) is slidably and limitably connected to the slide groove three (43); A plurality of connecting blocks (35) are fixedly connected to the upper side of the fixing plate (33), a telescopic rod (36) is hingedly connected to the connecting block (35), a connecting block (37) is hingedly connected to the side of the telescopic rod (36) away from the connecting block (35), and the connecting block (37) is fixedly connected to the protective frame (1).

7. A guardrail shielding device for foundation pit according to claim 6, characterized in that: A support plate (38) is fixedly connected to the lower side of the protection frame (1), and universal wheels (39) are fixedly connected to the four corners of the lower side of the support plate (38).

8. A guardrail shielding device for foundation pit according to claim 7, characterized in that: The protective frame (1) is fixedly connected to connecting blocks four (40) on both sides along the length direction, and the connecting blocks four (40) are provided with round holes two (41). The connecting blocks four (40) on both sides of the protective frame (1) are arranged in a staggered manner, so that two adjacent protective frames (1) can be matched up and down through the connecting blocks four (40).

9. A guardrail shielding device for foundation pit according to claim 8, characterized in that: The protective plate 1 (14), the protective plate 2 (17), the protective plate 3 (42), the protective rod 1 (16) and the protective rod 2 (19) are painted with warning signs.

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