A protective fence positioning support device

Abstract

The application belongs to the technical field of railway construction, and particularly relates to a protective fence positioning support device, which comprises a transfer frame for hoisting and suspending a protective fence stand from one side of a pre-buried pit into the pre-buried pit and a fixing frame capable of being inserted into the transfer frame from the back side to replace the transfer frame for supporting the stand, a horizontal bubble for leveling is arranged on the transfer frame, height-adjustable quick-change pads are arranged at four corners of the bottom of the transfer frame, a locking assembly is arranged on the quick-change pad, and the locking assembly is switched from a state of locking the transfer frame to a state of locking the fixing frame when the fixing frame supports the stand. Through the cooperation of the moving frame and the fixing frame, the positioning operation of the protective fence stand can be efficiently and conveniently carried out, and the inconvenience problem of the stand in the prior art when being suspended and positioned is solved.

Description

Technical Field

[0001] This invention relates to the field of railway construction technology; specifically, it relates to a protective fence positioning bracket device. Background Technology

[0002] Construction of fencing under high-speed railway bridges is an indispensable part of high-speed rail construction, with the posts serving as the "intermediate hubs" connecting the various sections of the fencing. Originally, the posts were simply placed at one end directly into a pre-dug pit for easy fixing. However, due to design changes, the posts were now installed suspended in the air, requiring the pouring of a certain amount of concrete at the base. This resulted in a distance between the posts and the ground, making installation, fixing, and vertical adjustment difficult, leading to slow construction progress and low efficiency. Summary of the Invention

[0003] In view of this, the present invention provides a protective fence positioning bracket device, thereby solving or at least alleviating the above-mentioned problems existing in the prior art.

[0004] To achieve the aforementioned objective, the present invention provides a protective fence positioning bracket device, comprising a transfer frame for suspending and lowering the protective fence post from one side of the pre-buried pit and suspending it within the pre-buried pit, and a fixing frame that can be inserted from the rear into the transfer frame to replace the transfer frame in supporting the post. The transfer frame is provided with a leveling bubble for leveling, and each of the four corners at the bottom of the transfer frame is provided with a height-adjustable quick-change pad. The quick-change pad is provided with a locking component, and when the fixing frame supports the post, the locking component switches from locking the transfer frame to locking the fixing frame.

[0005] Preferably, the transfer frame includes a transfer frame body, a lead screw, a lifting arm, and a first insert rod. The lead screw is rotatably mounted on the transfer frame body in a vertical state. One end of the lifting arm is threaded onto the outside of the lead screw. There are two first insert rods, which are horizontally distributed. The two first insert rods are fixedly mounted on the other end of the lifting arm, and are used to insert into the two lower pre-drilled holes among the four pre-drilled holes at the top of the column.

[0006] Preferably, the rear side of the transfer frame is provided with an opening for inserting the transfer frame, and one horizontal bubble is provided on the front side and the left and right sides of the bottom of the transfer frame.

[0007] Preferably, the fixing frame includes a fixing frame body and a second insert rod. The fixing frame body is provided with a lifting mounting plate, the second insert rod is disposed on the mounting plate, and the second insert rod is used to insert into the two upper pre-drilled holes among the four pre-drilled holes at the top of the column.

[0008] Preferably, the four bottom corners of the transfer frame and the four bottom corners of the fixing frame are respectively provided with a first support rod and a second support rod for connecting the quick-change pad. The second support rod can be sleeved onto the first support rod from the rear. The rear side and the left and right sides of the first support rod are provided with a first locking groove. The rear side and the left and right sides of the second support rod are provided with a second locking groove. The locking assembly includes locking blocks provided on the rear side and the left and right sides of the quick-change pad. The locking blocks can be inserted into the first locking groove and the second locking groove. A locking spring is connected to the outside of the locking block. When the second support rod moves downward outside the first support rod, it pushes the locking block out of the first locking groove.

[0009] Preferably, the top of the locking block facing the center of the quick-change pad is provided with an inclined surface. When the locking block is inserted into the first locking groove and the second locking groove, the top of the inclined surface is located outside the first locking groove and the second locking groove. The bottom of the second support rod is provided with a slope that matches the inclined surface at a position directly below the second locking groove.

[0010] Preferably, the top of the quick-change pad is fixedly provided with a sleeve whose inner cavity size is adapted to the second support rod. The sleeve is provided with a limiting sleeve that can be displaced downward and stored inside the quick-change pad. The quick-change pad is provided with a buffer spring that supports the limiting sleeve. The shape of the limiting sleeve is adapted to the cross-sectional shape of the second support rod. The front side of the sleeve is provided with a front channel for the first support rod to move forward out of the sleeve. The top of the rear side of the sleeve is provided with a rear channel that is adapted to the width of the second support rod and is used for the second support rod to move forward into the sleeve.

[0011] Preferably, a guide rod is fixedly connected to the outer side of the locking block, passing through the locking spring and the quick-change pad, and a threaded sleeve is threaded on the outer side of the guide rod.

[0012] Preferably, the mounting plate is provided with two horizontal slots, the second insertion rod slides through the horizontal slots, the rear end of the second insertion rod is fitted with a rotating plate, and the top ends of the two rotating plates are coaxially arranged and rotatably connected to the fixed frame. The fixed frame is provided with a guide groove with an outwardly expanding top end, and the outer sides of the two rotating plates respectively contact the two side walls of the guide groove.

[0013] Preferably, a support sleeve is fixedly provided at the bottom of the quick-change pad, a support screw is threadedly installed at the bottom of the support sleeve, and a support plate is rotatably installed at the bottom end of the support screw.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] 1. This application, through the combination of a movable frame, a level bubble, and a quick-change pad, enables the direct hoisting of the column from outside the pre-embedded pit into the pit, and fixes the column in a vertical position. By inserting a fixed frame into the movable frame and replacing it in supporting and fixing the column, and since both the column and the movable frame are leveled, the fixed frame can also be leveled with the column when supporting and fixing it. After the fixed frame replaces the movable frame in supporting and fixing the column, the movable frame can be removed and reused.

[0016] 2. This application sets up a mobile frame to level and fix the column first, and then inserts a fixed frame to replace the mobile frame to support and fix the column. Thus, when carrying out guardrail construction work, multiple fixed frames, multiple sets of quick-change pads and one mobile frame can be equipped. Since the size and weight of the fixed frame are smaller than the mobile frame, and the quick-change pads are smaller, the difficulty of transporting construction equipment can be reduced, and it is easier to carry and turn over.

[0017] 3. The column of this application is suspended in the pre-embedded pit, so that during the concrete pouring process, the concrete can completely cover the bottom and the bottom perimeter of the column, improving the stability of the column and thus improving the stability of the guardrail installation.

[0018] 4. The quick-change pad of this application can automatically detach from the mobile frame while replacing the mobile frame to support and fix the column after the fixed frame is inserted into the mobile frame, and automatically lock the fixed frame, thus making it more convenient for workers to operate and improving construction efficiency. Attached Figure Description

[0019] The disclosure of this invention will become more apparent from the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the guardrail positioning bracket device of this application during the installation of the positioning guardrail post;

[0021] Figure 2 For this application Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 This is a schematic diagram of the structure of the mobile frame in this application;

[0023] Figure 4 This is a schematic diagram of the structure of the fixing frame in this application;

[0024] Figure 5 For this application Figure 4 Enlarged view at point B in the middle;

[0025] Figure 6 For this application Figure 4 Enlarged view at point C;

[0026] Figure 7 For this application Figure 4 A diagram showing the disassembly of the central fixing frame;

[0027] Figure 8 For this application Figure 7 Enlarged view at point D;

[0028] Figure 9 This is a schematic diagram showing the overall fit of the quick-change pad, locking assembly, and support plate in this application.

[0029] Figure 10 For this application Figure 9 A sectional view.

[0030] Reference numerals: 1-Transfer frame; 1.1-Transfer frame body; 1.2-Screw rod; 1.3-Lifting arm; 1.4-First insert rod; 2-Fixed frame; 2.1-Fixed frame body; 2.2-Second insert rod; 3-Horizontal bubble; 4-Quick-change pad; 5-Locking assembly; 5.1-Locking block; 5.2-Locking spring; 6-Opening; 7-Mounting plate; 8-First support rod; 9-Second support rod; 10-First locking groove; 11-Second locking groove; 12-Inclined surface; 13-Slope; 14-Rod sleeve; 15-Limit sleeve; 16-Buffer spring; 17-Front channel; 18-Rear channel; 19-Guide rod; 20-Threaded sleeve; 21-Horizontal groove; 22-Turn plate; 23-Guide groove; 24-Support screw sleeve; 25-Support screw; 26-Support plate. Detailed Implementation

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figure 1 and Figure 2 As shown, this embodiment provides a guardrail positioning bracket device, including a transfer frame 1 for suspending guardrail posts from one side of the pre-buried pit and hanging them in the pre-buried pit, and a fixing frame 2 that can be inserted into the transfer frame 1 from the rear to replace the transfer frame 1 in supporting the posts. The transfer frame 1 is provided with a leveling bubble 3, and each of the four corners at the bottom of the transfer frame 1 is provided with a quick-change pad 4 that can adjust the height. The quick-change pad 4 is provided with a locking component 5. When the fixing frame 2 supports the posts, the locking component 5 switches from locking the transfer frame 1 to locking the fixing frame 2.

[0033] When positioning the guardrail post, first move the transfer frame 1 to the pre-buried pit, and install four quick-change pads 4 at the bottom of the transfer frame 1. The locking assembly 5 locks the quick-change pads 4 to the transfer frame 1. Adjust the height of the four quick-change pads 4 by observing the level bubble 3 to level the transfer frame 1. Then connect the guardrail post to be positioned to the transfer frame 1, lift the post from one side of the pre-buried pit using the transfer frame 1, transfer the post to the top of the pre-buried pit, and then lower the post so that the bottom of the post enters the pre-buried pit. After that, directly insert the fixing frame 2 into the transfer frame 1 from the rear side, so that the bottom of the fixing frame 2 is on the four quick-change pads 4. The locking assembly 5 unlocks from the transfer frame 1 and locks with the fixing frame 2. Finally, by continuing to lower the column, the column is supported and fixed by the fixing frame 2, and the transfer frame 1 is relieved of its supporting force on the column. At this time, the transfer frame 1 can be pulled out from the quick-change pad 4 and moved to the next pre-embedded pit position for reuse, while the fixing frame 2 and the quick-change pad 4 continue to support and fix the column.

[0034] like Figure 1 and Figure 3 As shown, the transfer frame 1 of this application includes a transfer frame body 1.1, a lead screw 1.2, a lifting arm 1.3, and first insertion rods 1.4. The lead screw 1.2 is vertically mounted on the transfer frame body 1.1. One end of the lifting arm 1.3 is threaded onto the outside of the lead screw 1.2. There are two first insertion rods 1.4, which are horizontally distributed and fixedly mounted on the other end of the lifting arm 1.3. The two first insertion rods 1.4 are used to insert into the two lower pre-drilled holes among the four pre-drilled holes at the top of the column. Specifically, the lifting arm 1.3 and the lead screw 1.2 are both located on the front side of the transfer frame body 1.1.

[0035] Before hoisting the column, adjust the height of the four quick-change pads 4. By observing the horizontal bubble 3, the transfer frame 1.1 can be leveled.

[0036] When hoisting the column, first rotate the hoisting arm 1.3 so that the first insertion rod 1.4 is outside the transfer frame 1.1. Lift the column and fit the two first insertion rods 1.4 into the two pre-drilled holes at the bottom of the column. Then rotate the hoisting arm 1.3 so that it moves the column directly above the pre-embedded pit. Afterward, while maintaining the position of the hoisting arm 1.3, rotate the lead screw 1.2. As the hoisting arm 1.3 moves downward, it lowers the bottom of the column into the pre-embedded pit. At this time, the column remains supported and fixed by the transfer frame 1.

[0037] like Figure 3As shown, the rear side of the transfer frame 1.1 is provided with an opening 6 for inserting the transfer frame 1, and a horizontal bubble 3 is provided on the front side and the left and right sides of the bottom of the transfer frame 1. The opening 6 is rectangular. After the transfer frame 1 is separated from the quick-change pad 4, the transfer frame 1 can be moved away from the outside of the fixed frame 2 by moving the transfer frame 1 forward.

[0038] like Figure 4 and Figure 5 As shown, the fixing frame 2 of this application includes a fixing frame body 2.1 and a second insert rod 2.2. The fixing frame body 2.1 is provided with a lifting mounting plate 7, and the second insert rod 2.2 is disposed on the mounting plate 7. The second insert rod 2.2 is used to insert into the two upper pre-drilled holes among the four pre-drilled holes at the top of the column. The two second insert rods 2.2 are moved up and down by the mounting plate 7 to better adapt to the distance error between the upper and lower rows of pre-drilled holes. After the fixing frame 2 is placed on the quick-change pad 4, when the column is lowered further, the mounting plate 7 and the second insert rod 2.2 will move downward to the lowest position on the fixing frame 2. Then, under the action of gravity, the column will press down on the fixing frame 2 through the second insert rod 2.2 and the mounting plate 7 and be supported by the fixing frame 2.

[0039] like Figure 3 , Figure 6 and Figure 7 As shown, the bottom four corners of the transfer frame 1 and the bottom four corners of the fixing frame 2 are respectively provided with a first support rod 8 and a second support rod 9 for connecting the quick-change pad 4. The second support rod 9 can be fitted onto the first support rod 8 from the rear. The rear side and the left and right sides of the first support rod 8 are provided with a first locking groove 10, and the rear side and the left and right sides of the second support rod 9 are provided with a second locking groove 11.

[0040] like Figure 2 , Figure 9 and Figure 10 As shown, the locking assembly 5 includes locking blocks 5.1 disposed on the rear side and left and right sides of the quick-change pad 4. The locking blocks 5.1 can be inserted into the first locking groove 10 and the second locking groove 11, and a locking spring 5.2 is connected to the outer side of the locking blocks 5.1. When the second support rod 9 moves downward outside the first support rod 8, it pushes the locking blocks 5.1 out of the first locking groove 10.

[0041] When installing the quick-change pad 4 to the bottom of the transfer frame 1, simply slip the quick-change pad 4 onto the first support rod 8 from bottom to top. Then, the locking block 5.1 is inserted into the first locking groove 10 under the action of the locking spring 5.2, which locks and fixes the quick-change pad 4 to the bottom of the transfer frame 1.

[0042] When the fixing frame 2 is inserted into the transfer frame 1 from the rear, the second support rod 9 is sleeved onto the first support rod 8 from back to front. Then, during the process of lowering the column, as the fixing frame 2 is displaced downward by the column and its own weight, the second support rod 9 first pushes the locking block 5.1 outward and disengages it from the first locking groove 10. Then, it continues to push the locking block 5.1 outward and moves it to the outside of the second support rod 9. When the bottom end of the second support rod 9 contacts the quick-change pad 4, the locking block 5.1 is inserted into the second locking groove 11 under the action of the locking spring 5.2. At this time, the quick-change pad 4 is locked and fixed to the outside of the second support rod 9, so that the quick-change pad 4 is fixed to the fixing frame 2, thereby supporting the fixing frame 2 in the leveled state.

[0043] It should be noted that since the column is already in a vertical state before being lowered onto the fixing frame 2, the column will only move downwards during the process of being lowered onto the fixing frame 2, so that the column remains in a vertical state when it is supported and fixed by the fixing frame 2.

[0044] like Figure 6 and Figure 9 As shown, the top of the locking block 5.1 facing the center of the quick-change pad 4 is provided with an inclined surface 12. When the locking block 5.1 is inserted into the first locking groove 10 and the second locking groove 11, the top of the inclined surface 12 is located outside the first locking groove 10 and the second locking groove 11. The bottom of the second support rod 9 is provided with a slope 13 adapted to the inclined surface 12 at a position directly below the second locking groove 11. By setting the cooperation of the inclined surface 12 and the slope 13, during the downward displacement of the second support rod 9 outside the first support rod 8, the slope 13 squeezes the inclined surface 12 outward, causing the locking block 5.1 to disengage from the first locking groove 10 and move to the outside of the second support rod 9. Thus, the quick-change pad 4 automatically switches from the state of the locking transfer frame 1 to the state of the locking fixing frame 2, simplifying the operation steps and improving construction efficiency.

[0045] like Figure 2 , Figure 9 and Figure 10 As shown, a sleeve 14 with an inner cavity size that matches the second support rod 9 is fixedly installed on the top of the quick-change pad 4. A limiting sleeve 15 that can be displaced downward and stored inside the quick-change pad 4 is provided inside the sleeve 14. A buffer spring 16 that supports the limiting sleeve 15 is provided inside the quick-change pad 4. The shape of the limiting sleeve 15 matches the cross-sectional shape of the second support rod 9. A front channel 17 for the first support rod 8 to move forward out of the sleeve 14 is provided on the front side of the sleeve 14. A rear channel 18 that matches the width of the second support rod 9 and is used for the second support rod 9 to move forward into the sleeve 14 is provided on the top of the rear side of the sleeve 14.

[0046] When the fixing frame 2 is inserted into the transfer frame 1 from the rear side, the second support rod 9 is aligned with the rear channel 18 and enters the rod sleeve 14 through the rear channel 18, so that the second support rod 9 is sleeved outside the first support rod 8. During the process of the second support rod 9 moving downward outside the first support rod 8 and contacting the top of the quick-change pad 4, the second support rod 9 presses down the limiting sleeve 15 into the quick-change pad 4. During this process, the buffer spring 16 is compressed. During the compression of the buffer spring 16, it can provide a buffering force for the fixing frame 2, reduce the downward impact force on the fixing frame 2 and quick-change pad 4 during the process of the column switching from being supported by the transfer frame 1 to being supported by the fixing frame 2, and effectively avoid deformation of the second insertion rod 2.2, quick-change pad 4 and fixing frame 2.

[0047] During the process of installing the quick-change pad 4 onto the first support rod 8, the first support rod 8 is inserted into the limiting sleeve 15. The limiting sleeve 15 is fitted onto the outside of the first support rod 8, which can limit the first support rod 8 and effectively prevent lateral movement between the quick-change pad 4 and the transfer frame 1.

[0048] After the second support rod 9 presses the limiting sleeve 15 downward into the quick-change pad 4, the transfer frame 1 is pushed forward directly. The first support rod 8 can be disengaged from the quick-change pad 4 through the front channel 17, achieving a more convenient operation.

[0049] like Figure 10 As shown, a guide rod 19, which passes through the locking spring 5.2 and the quick-change pad 4, is fixedly connected to the outer side of the locking block 5.1. A threaded sleeve 20 is threaded on the outer side of the guide rod 19. After the concrete is poured into the pre-embedded pit and initially set, the fixing frame 2 is separated from the column. By rotating the threaded sleeve 20, the threaded sleeve 20 is moved towards the center of the quick-change pad 4. The threaded sleeve 20 can move the guide rod 19 away from the center of the quick-change pad 4 and compress the locking spring 5.2, thereby allowing the locking block 5.1 to separate from the second locking groove 11.

[0050] like Figure 8 As shown, the mounting plate 7 is provided with two horizontal slots 21. The second insert rod 2.2 slides through the horizontal slots 21. The rear end of the second insert rod 2.2 is fitted with a rotating plate 22. The top ends of the two rotating plates 22 are coaxially arranged and rotatably connected to the fixed frame 2.1. The fixed frame 2.1 is provided with a guide groove 23 with an outwardly expanding top end. The outer sides of the two rotating plates 22 respectively contact the two side walls of the guide groove 23.

[0051] Specifically, the second frame 2.1 is equipped with a slider that can be raised and lowered, and a connecting shaft is installed on the slider. The top ends of the two rotating plates 22 are rotatably sleeved on the connecting shaft. The arrangement of the rotating plates 22 allows the two second insert rods 2.2 to move synchronously and in opposite directions when the second insert rods 2.2 are pushed by the side wall of the guide groove 23, thus enabling the two second insert rods 2.2 to move towards each other or in opposite directions.

[0052] During the process of lowering the column onto the fixing frame 2, the weight of the column is applied to the second insertion rod 2.2. At this time, the second insertion rod 2.2 and the positioning plate as a whole undergo a downward displacement on the fixing frame 2. Under the action of the guide groove 23, the two rotating plates 22 respectively drive the two second insertion rods 2.2 to move relative to each other. At this time, the two second insertion rods 2.2 will clamp the reserved hole in the center of the column, thereby using the weight of the column to clamp the column and improve the stability of fixing the column.

[0053] like Figure 2 and Figure 10 As shown, the quick-change pad 4 of this application has a support sleeve 24 fixedly installed at its bottom. A support screw 25 is threaded onto the bottom of the support sleeve 24, and a support plate 26 is rotatably installed at the bottom end of the support screw 25. The height of the quick-change pad 4 can be adjusted by using a wrench to fix the support sleeve 24 and then using another wrench to rotate the support screw 25.

[0054] In summary, the protective fence positioning bracket device of this application, through the cooperation of the transfer frame 1, the fixed frame 2, and the quick-change pad 4, allows for leveling of the transfer frame 1 by directly adjusting the height of the quick-change pad 4. The leveled transfer frame 1 is then used to vertically hoist the column into the pre-buried pit, thus achieving leveling of the column. The fixed frame 2 then replaces the transfer frame 1 to support and fix the column, allowing the transfer frame 1 to be promptly removed and used with other quick-change pads 4 to hoist and install the next column. Simultaneously, during the process of replacing the transfer frame 1 to support and fix the column, the fixed frame 2, supported by the quick-change pad 4, ensures that the column remains vertical after replacing the transfer frame 1 in supporting and fixing the column.

[0055] The technical scope of this invention is not limited to the contents of the above specification. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the scope of this invention.

Claims

1. A protective barrier positioning support apparatus, characterized by, The transfer frame (1) and the fixed frame (2) which can be inserted into the transfer frame (1) from the rear side to replace the transfer frame (1) to support the column, the transfer frame (1) is provided with a horizontal bubble (3) for leveling, four corners of the bottom of the transfer frame (1) are provided with quick-change pads (4) which can adjust the height, the quick-change pads (4) are provided with locking assemblies (5), the locking assemblies (5) are switched from the state of locking the transfer frame (1) to the state of locking the fixed frame (2) when the fixed frame (2) supports the column.

2. A protective barrier positioning support apparatus as claimed in claim 1, wherein, The transfer frame (1) includes a transfer frame body (1.1), a lead screw (1.2), a lifting arm (1.3) and a first inserting rod (1.4), the lead screw (1.2) is vertically installed on the transfer frame body (1.1), one end of the lifting arm (1.3) is threadedly sleeved outside the lead screw (1.2), two first inserting rods (1.4) are provided, the two first inserting rods (1.4) are horizontally distributed, the other end of the lifting arm (1.3) is fixedly provided with the two first inserting rods (1.4), and the two first inserting rods (1.4) are used for being inserted into the lower two reserved holes in the four reserved holes in the top of the column.

3. A protective barrier positioning support apparatus as claimed in claim 2, wherein, The rear side of the transfer frame body (1.1) is provided with an open mouth (6) for the insertion of the transfer frame (1), and one horizontal bubble (3) is arranged on the front side and the left and right sides of the bottom of the transfer frame (1).

4. A protective barrier positioning support apparatus as claimed in claim 1, wherein, The fixed frame (2) includes a fixed frame body (2.1) and a second inserting rod (2.2), the fixed frame body (2.1) is provided with a mounting plate (7) which can be lifted and lowered, the second inserting rod (2.2) is arranged on the mounting plate (7), and the second inserting rod (2.2) is used for being inserted into the upper two reserved holes in the four reserved holes in the top of the column.

5. A protective barrier positioning support apparatus as claimed in claim 4, wherein, The bottom four corners of the transfer frame (1) and the bottom four corners of the fixed frame (2) are respectively provided with first support rods (8) and second support rods (9) for connecting the quick-change pads (4), the second support rods (9) can be sleeved with the first support rods (8) from the rear side, the rear side and the left and right sides of the first support rods (8) are provided with first locking grooves (10), the rear side and the left and right sides of the second support rods (9) are provided with second locking grooves (11), the locking assemblies (5) include locking blocks (5.1) arranged on the rear side and the left and right sides of the quick-change pads (4), the locking blocks (5.1) can be inserted into the first locking grooves (10) and the second locking grooves (11), the outer sides of the locking blocks (5.1) are connected with locking springs (5.2), and the second support rods (9) push the locking blocks (5.1) out of the first locking grooves (10) when they are displaced downward outside the first support rods (8).

6. A protective barrier positioning support apparatus as claimed in claim 5, wherein, The locking block (5.1) is provided with an inclined surface (12) on the top of the center side of the quick-change base plate (4), when the locking block (5.1) is inserted into the first locking groove (10) and the second locking groove (11), the top of the inclined surface (12) is located outside the first locking groove (10) and the second locking groove (11), and the bottom of the second supporting rod (9) is located below the second locking groove (11). A slope (13) is arranged at the position.

7. A protective barrier positioning support apparatus as claimed in claim 5, wherein, The top of the quick-change base plate (4) is fixedly provided with a rod sleeve (14) with an inner cavity size matched with the second supporting rod (9), the inside of the rod sleeve (14) is provided with a limiting sleeve (15) capable of being downwardly displaced and accommodated inside the quick-change base plate (4), the quick-change base plate (4) is provided with a buffer spring (16) supporting the limiting sleeve (15), the shape of the limiting sleeve (15) is matched with the cross-sectional shape of the second supporting rod (9), the front side of the rod sleeve (14) is provided with a front passage (17) for the first supporting rod (8) to move out of the rod sleeve (14), and the top of the rear side of the rod sleeve (14) is provided with a rear passage (18) matched with the width of the second supporting rod (9) and used for the second supporting rod (9) to enter the rod sleeve (14).

8. A protective barrier positioning support apparatus as defined in claim 5, wherein, The outer side of the locking block (5.1) is fixedly connected with a guide rod (19) penetrating through the locking spring (5.2) and the quick-change base plate (4), and the outer side of the guide rod (19) is threadedly sleeved with a threaded sleeve (20).

9. A protective barrier positioning support apparatus as defined in claim 4, wherein, Two transverse grooves (21) are arranged on the mounting plate (7), the second insertion rod (2.2) is slidably arranged in the transverse grooves (21), the rear end of the second insertion rod (2.2) is sleeved with a rotating plate (22), the top ends of the two rotating plates (22) are coaxially arranged and rotationally connected to the fixed frame body (2.1), the fixed frame body (2.1) is provided with a guide groove (23) with an outwardly expanded top end, and the outer sides of the two rotating plates (22) respectively contact the two side walls of the guide groove (23).

10. A protective barrier positioning support apparatus as defined in claim 1, wherein, The bottom of the quick-change base plate (4) is fixedly provided with a supporting screw sleeve (24), the bottom of the supporting screw sleeve (24) is threadedly mounted with a supporting screw rod (25), and the bottom end of the supporting screw rod (25) is rotationally mounted with a supporting plate (26).

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