Steel arch lock foot setting quick positioning tool

Abstract

The application relates to the field of tunnel construction supporting equipment, in particular to a steel arch frame locking foot setting quick positioning tool, which comprises a steel frame mechanism, the steel frame mechanism comprises a horizontal rod, the two ends of the horizontal rod are connected with telescopic supporting legs, the two ends of the horizontal rod are sleeved with quick adjusting mechanisms, the two ends of the horizontal rod and the two groups of quick adjusting mechanisms are connected with supports, and the top ends of the supports are provided with laser positioners. The device can realize the effect of quickly positioning the position and angle of the three-arm rock drilling jumbo locking foot setting after the laser positioner is adjusted by the steel frame mechanism; the extended rod directly drives the supports and the laser positioner to adjust the position, and the extended rod is automatically locked in position again through the internal mechanism of the quick adjusting mechanism after the operating rod is loosened; the device cannot be unlocked except the operating rod and can be operated by one hand, so the device is very convenient and effectively solves the problems of difficult positioning and poor locking foot setting angle control precision of the three-arm rock drilling jumbo when setting the locking foot anchor rod.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction equipment, and in particular to a quick positioning tool for installing steel arch frame locking feet. Background Technology

[0002] With the vigorous development of railway construction in my country, the number and scale of mountain tunnels have also increased significantly. Currently, projects such as the Sichuan-Tibet Railway have a large proportion of tunnels, extremely complex geological conditions, harsh environments, and tight construction schedules. Tunnel construction has become a key project in the construction of the Sichuan-Tibet Railway. In order to meet construction needs and reduce the pressure of the construction period, the tunnel excavation has introduced a three-arm rock drilling rig to carry out mechanized construction, which has greatly improved the quality, progress, and safety of tunnel excavation.

[0003] However, in the critical process of installing anchor bolts (pipes) on the three-arm rock drilling rig, there are problems such as difficulty in positioning the mechanical arm of the three-arm rock drilling rig, poor accuracy in controlling the angle of anchor bolt installation, and low construction efficiency, which makes it difficult to meet the on-site construction progress requirements. Therefore, a quick positioning tool for installing anchor bolts on steel arch frames is proposed to solve the above problems. Summary of the Invention

[0004] In view of the problems of positioning difficulties and poor accuracy in controlling the anchoring angle when installing anchor bolts in the above-mentioned or existing technologies, this invention is proposed.

[0005] Therefore, the purpose of this invention is to provide a quick positioning fixture for installing the locking feet of a steel arch frame.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a quick positioning fixture for locking the feet of a steel arch frame, comprising a steel frame mechanism, which includes a crossbar. Telescopic outriggers are connected to both ends of the crossbar. Quick-adjustment mechanisms are sleeved at both ends of the crossbar. Supports are connected to both ends of the crossbar and the two sets of quick-adjustment mechanisms, and laser positioners are provided at the top of each support. The quick-adjustment mechanism includes a sleeve, and racks are arranged parallel to the axial direction of the inner wall of the sleeve. The racks are arranged in a circular array about the sleeve, and the teeth between the racks are staggered along the axial direction of the sleeve. Two adjacent racks form a group, and any two racks in any group... The teeth of the sleeve are evenly spaced along the axial direction; a slider is slidably sleeved inside the sleeve, and the slider is matched with the rack with a groove. The groove is provided with a slot corresponding to the tooth groove of the rack, and a locking block is inserted into the slot. The slider has a circular hole along its axial direction, and a lever is sleeved in the circular hole. The outer wall of the lever has a positioning groove in the middle of the ring, and the lever has symmetrical conical surfaces on both sides of the positioning groove. Both ends of the lever are provided with a retaining edge, and both ends of the lever are provided with a spring. The top of the locking block matches the tooth groove of the rack, and the bottom of the locking block is arc-shaped and matches the outer wall of the lever. A spring ring is sleeved between the locking blocks.

[0007] As a preferred embodiment of the quick positioning tool for locking the steel arch frame of the present invention, both sets of telescopic legs are perpendicular to the outer wall of the crossbar, and the two sets of telescopic legs are parallel to each other.

[0008] As a preferred embodiment of the quick positioning tool for locking the steel arch frame of the present invention, wherein: the inner arc surface of the bottom end of the locking block is provided with a convex strip in the positioning groove, and the convex strip is sleeved with the positioning groove.

[0009] As a preferred embodiment of the quick positioning fixture for locking the steel arch frame of the present invention, one end of the lever is connected to a control lever, and an outer retaining spring is provided on the outer wall of the control lever. An inner retaining spring is provided on the inner wall of the end of the slider away from the control lever, and the two sets of springs are respectively pressed and assembled between the inner retaining spring and the stop edge of the lever, and between the outer retaining spring and the stop edge of the lever.

[0010] As a preferred embodiment of the quick positioning tool for locking the steel arch frame of the present invention, the lever is made of rubber and is hollow inside. The lever is provided with a slit along its radial direction between the retaining edges. The slits are distributed between adjacent locking blocks and are arranged in a ring array about the lever.

[0011] As a preferred embodiment of the quick positioning tool for locking the steel arch frame of the present invention, the locking block is located between the retaining edges of the lever block and is in sliding contact with the lever block.

[0012] As a preferred embodiment of the quick positioning tool for locking the steel arch frame of the present invention, wherein: an extension rod is slidably sleeved on the outside of the operating rod, and the outer contour of the cross-section of the extension rod is consistent with that of the slider, one end of the extension rod is fixedly connected to the slider, and the length of the extension rod is less than that of the operating rod.

[0013] As a preferred embodiment of the quick positioning fixture for locking the steel arch frame of the present invention, the bracket connected to the quick adjustment mechanism is fixedly sleeved on the extension rod, and the bracket is provided with a baffle on the side away from the sleeve, and the baffle is sleeved on the end of the operating lever.

[0014] As a preferred embodiment of the quick positioning fixture for locking the steel arch frame of the present invention, the side wall of the bracket and both ends of the crossbar are threaded with hand-tightening screws, and the hand-tightening screws of the bracket are correspondingly tightened to the crossbar and extension rod of the bracket, and the hand-tightening screws on the crossbar are tightened to the outer wall of the sleeve.

[0015] As a preferred embodiment of the quick positioning tool for locking the steel arch frame of the present invention, a horizontal ruler is provided at the middle of the crossbar.

[0016] The beneficial effects of the steel arch frame locking foot installation quick positioning fixture of the present invention are as follows: After the laser positioner is adjusted by the steel frame mechanism, the device can achieve the effect of quickly positioning the locking foot installation position and angle of the three-arm rock drilling rig. After the initial assembly of the steel frame mechanism is completed, the distance between the laser positioners can be quickly and accurately adjusted by the quick adjustment mechanism. Simply push or pull the control lever to directly operate the extension rod to drive the bracket and laser positioner to adjust the position. After releasing the control lever, the extension rod will automatically lock the position again through the internal mechanism of the quick adjustment mechanism. It cannot be unlocked except by the control lever. It can be operated with one hand, which is very convenient. It effectively solves the problems of difficult positioning and poor locking foot installation angle control accuracy when the three-arm rock drilling rig is installing locking foot anchor rods. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. 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.

[0018] Figure 1 A schematic diagram of the overall structure of the quick positioning fixture for the locking feet of the steel arch frame.

[0019] Figure 2 Install quick positioning fixtures for the locking feet of steel arch frames Figure 1 Enlarged view of the structure of A in the middle.

[0020] Figure 3 Install quick positioning fixtures for the locking feet of steel arch frames Figure 3 A structural sectional view.

[0021] Figure 4 A schematic diagram of the quick-adjustment mechanism for installing quick-positioning fixtures for the locking feet of steel arch frames.

[0022] Figure 5 A sectional view of the quick-adjustment mechanism for installing quick-positioning fixtures for the locking feet of steel arch frames.

[0023] Figure 6 A schematic diagram of the assembly structure of the piston and rack for installing a quick-positioning fixture for the locking feet of the steel arch frame.

[0024] Figure 7 A sectional view of the piston used to install a quick-positioning fixture for locking the steel arch frame.

[0025] Figure 8 An exploded view of the assembly structure of the lever and spring for installing a quick-positioning fixture for the locking feet of the steel arch frame.

[0026] Figure 9 A sectional view of the assembly structure of the lever and locking block for installing a quick positioning fixture for the locking feet of the steel arch frame.

[0027] Figure 10 A schematic diagram of the assembly structure of the clamping block and spring ring for installing a quick positioning fixture for the locking feet of the steel arch frame.

[0028] Figure 11 A schematic diagram showing the tooth groove positions between the racks of the quick-positioning fixture used to install the locking feet of the steel arch frame. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Example 1, referring to Figure 1 and Figure 2This is the first embodiment of the present invention. This embodiment provides a quick positioning fixture for setting up a steel arch frame locking foot, which can quickly position and angle the locking foot of a three-arm rock drilling rig. It includes a steel frame mechanism 100, which encloses a crossbar 101. Both ends of the crossbar 101 are connected to telescopic outriggers 102. Both sets of telescopic outriggers 102 are perpendicular to the outer wall of the crossbar 101 and are parallel to each other. Both ends of the crossbar 101 are fitted with quick-adjustment mechanisms 200. Both ends of 1 and the two sets of quick-adjustment mechanisms 200 are connected to brackets 103, and laser positioners 300 are provided at the top of each bracket 103. A level 400 is provided at the middle of the crossbar 101. The side walls of the bracket 103 and both ends of the crossbar 101 are threaded with hand screws 104. The hand screws 104 of the bracket 103 are correspondingly tightened to the crossbar 101 and extension rod 209 connected to the bracket 103, and the hand screws 104 on the crossbar 101 are tightened to the outer wall of the sleeve 201.

[0033] refer to Figure 1 The device is placed on the ground via telescopic outriggers 102. A pair of laser locators 300 are installed at each end of the crossbar 101, emitting cross-shaped laser auxiliary beams. Before the three-arm rock drilling rig installs the anchor bolts, the steel arch frame anchor bolt quick-positioning fixture is placed longitudinally along the tunnel centerline. Leveling is achieved using the four telescopic outriggers 102 and a spirit level 400. The pitch angle of the bracket 103 and laser locators 300, as well as the adjustment along the crossbar 101, can be adjusted by loosening the hand screws 104. The location is determined by adjusting the distance between two laser positioners 300 on the same side using a quick-adjustment structure. This allows the distance between the laser positioners 300 on the same side to be adjusted to match the width of the steel frame, enabling the positioning and installation of anchor bolts on both sides of a single arch frame. The distance between the two laser positioners 300 in the middle is adjusted according to the arch frame spacing to achieve simultaneous positioning and installation of anchor bolts on both arch frames. After the tooling is positioned, four crosshair lasers can be emitted to simultaneously position both sides of the two steel arch frames in the tunnel, ensuring accurate anchor bolt positioning and verifying the positioning accuracy of the steel frame.

[0034] For the specific principle of the quick-adjustment mechanism 200, please refer to Example 2.

[0035] In summary, this device effectively achieves rapid positioning of the locking foot location and angle of the three-arm rock drilling rig.

[0036] Example 2, refer to Figures 3 to 10This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a quick-adjustment mechanism 200 for quickly positioning the locking foot of the steel arch frame, enabling rapid and accurate adjustment of the laser positioner 300. The quick-adjustment mechanism 200 includes a sleeve 201, with a rack 202 arranged parallel to its axial direction on the inner wall of the sleeve 201, and the rack 202 arranged in a circular array about the sleeve 201. A slider 203 is slidably sleeved inside the sleeve 201, and the slider 203 has a groove 203a that matches the rack 202. A slot 203b is formed in the groove 203a corresponding to the tooth groove position of the rack 202. The slot 203b is fitted with a locking block 205. The slider 203 has a circular hole 203c along its axial direction. A lever 204 is fitted inside the circular hole 203c. The outer wall of the lever 204 has a positioning groove 204a in a circular shape in the middle. The lever 204 has conical surfaces 203d symmetrically on both sides of the positioning groove 204a. Both ends of the lever 204 are provided with a retaining edge 204b. Both ends of the lever 204 are provided with a spring 206. The top of the locking block 205 matches the tooth groove of the rack 202. The bottom of the locking block 205 is arc-shaped and matches the outer wall of the lever 204. A spring ring 207 is fitted between the locking blocks 205.

[0037] Specifically, the inner arc surface of the bottom end of the locking block 205 is fitted with a protrusion 205a to match the positioning groove 204a. The protrusion 205a is sleeved with the positioning groove 204a. One end of the lever 204 is connected to the operating lever 208, and the outer wall of the operating lever 208 is provided with an outer retaining spring 210. The inner wall of the end of the slider 203 away from the operating lever 208 is provided with an inner retaining spring 211. Two sets of springs 206 are respectively pressed and assembled between the inner retaining spring 211 and the retaining edge 204b of the lever 204, and between the outer retaining spring 210 and the retaining edge 204b of the lever 204. The lever 204 is made of rubber and is hollow inside. The lever 204 has a slit 204c radially opened between the retaining edges 204b. Cutouts 204c are distributed between adjacent locking blocks 205, and the cutouts 204c are arranged in a ring array about the lever 204. The locking blocks 205 are located between the retaining edges 204b of the lever 204 and are in sliding contact with the lever 204. An extension rod 209 is slidably sleeved on the outside of the control lever 208, and the outer contour of the cross section of the extension rod 209 is consistent with that of the slider 203. One end of the extension rod 209 is fixedly connected to the slider 203, and the length of the extension rod 209 is less than that of the control lever 208. The bracket 103 connected to the quick adjustment mechanism 200 is fixedly sleeved on the extension rod 209, and a baffle 103a is provided on the side of the bracket 103 away from the sleeve 201, and the baffle 103a is sleeved on the end of the control lever 208.

[0038] By pulling the control lever 208, the extension rod 209 can be directly operated to drive the bracket 103 and the laser positioner 300 to adjust their positions. After releasing the control lever 208, the extension rod 209 will automatically lock its position again through the internal mechanism of the quick adjustment mechanism 200. It cannot be unlocked except by the control lever 208. It can be operated with one hand and is very convenient.

[0039] The specific working principle is as follows: First, the sleeve 201 and the relative crossbar 101 remain in the same position. The slider 203 and the locking block 205, in the locked state, also remain in the same position relative to the sleeve 201. When the control lever 208 is pulled outwards or pushed inwards to move the lever 204, the lever 204 moves relative to the locking block 205, causing the locking block 205 to disengage from the positioning groove 204a in the middle of the lever 204 and move relative to the conical surface 203d. Since the slot 203b is arranged radially along the slider 203, the contraction of the spring ring 207 ensures that the locking block 205 remains pressed against the outer wall of the lever 204, and moves controllably towards the slider 203d along the conical surface 203d. 03 The internal retraction causes the locking block 205 to disengage from the tooth groove of the rack 202. At this time, the slider 203 can slide relative to the sleeve 201. Because the two ends of the lever 204 are symmetrical, whether the lever 204 is pushed or pulled, the conical surface 203d and the spring ring 207 can control the locking block 205 to unlock in both directions. When the control lever 208 is released, the two springs 206 reset the lever 204 relative to the slider 203. The protrusion 205a on the locking block 205 will slide back into the positioning groove 204a. At the same time, the locking block 205 will also climb along the conical surface 203d and re-insert into the tooth groove of the rack 202, thus locking the block.

[0040] The device also has the following technical details: First, the rack 202 guides the slider 203 and the extension rod 209, preventing the extension rod 209 from deflecting relative to the sleeve 201, thereby maintaining the angular stability of the laser positioner 300 mounted on the extension rod 209; Second, the positioning groove 204a in the middle of the lever 204 allows the lever 204 to slide back into place when the control lever 208 is not operated, as the two springs 206 reset the lever 204 relative to the slider 203. Once inside the positioning groove 204a, when the control lever 208 is operated again, the resistance of the positioning groove 204a and the elastic force of the spring ring 207 need to be overcome to remove the locking block 205 from the positioning groove 204a, thus providing a clear operating feel; thirdly, since the opening of the tooth groove is relatively narrow, the locking block 205 does not require a high squeezing force after insertion to achieve a strong limiting force in the axial direction of the rack 202. Therefore, the lever 204 is made of rubber material with appropriate hardness and is hollow inside. For specific functions, please refer to Embodiment 3.

[0041] The rest of the structure is the same as in Example 1.

[0042] In summary, this device, through the movement of the specially designed lever 204 in conjunction with the spring ring 207, can quickly unlock and lock in both adjustment directions, effectively achieving rapid and accurate adjustment of the position of the laser positioner 300.

[0043] Example 3, referring to Figures 5 to 11 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a rack 202 and a locking block 205 of a quick-adjustment mechanism 200 for fast positioning of the steel arch frame locking foot. The quick-adjustment mechanism 200 achieves precise position adjustment of the laser positioner 300 through the position layout. The rack 202 has teeth that are staggered along the axial direction of the sleeve 201. Two adjacent racks 202 form a group, and the teeth of any two racks 202 in any group are equally spaced along the axial direction of the sleeve 201.

[0044] Especially for reference Figure 11 The image shows the effect of unfolding and tiling the ring-shaped racks 202, demonstrating the difference in the position of the tooth grooves between the racks 202. The dashed lines a, b, c, and d, which indicate the position of the tooth tips of the racks 202, have the same spacing between any adjacent dashed lines.

[0045] The purpose of the above design is that the device uses racks 202 for position locking. Therefore, the tooth spacing of a single rack 202 determines the fineness of the adjustment; the smaller the tooth spacing, the finer the adjustment. However, the tooth spacing of the rack 202 cannot be too small, otherwise the tooth grooves will be too shallow and unable to effectively achieve the purpose of position locking. Therefore, by using multiple racks 202 in cooperation, the tooth grooves of adjacent racks 202 are slightly offset by a certain distance. This subdivides the original tooth spacing of a single rack 202. Combined with multiple locking blocks 205, a single locking block 205 only needs to move a maximum of one-fifth of the tooth spacing of a single rack 202 (see attached diagram). Figure 5 For example, although the number of racks 202 is not limited to five, a locking block 205 can be inserted into the tooth groove of the corresponding rack 202 to meet the positioning requirements.

[0046] Based on the above working characteristics, when one of the locking blocks 205 enters the tooth groove of the rack 202, the other locking blocks 205 will be unable to fully enter the tooth groove. Therefore, the push block 204 is made of rubber material with appropriate hardness and is hollow inside. A cut 204c is designed for the area where the locking block 205 is located, so that the locking block 205 that fails to play a positioning role can be squeezed down by the push block 204 to avoid structural conflict.

[0047] The rest of the structure is the same as in Example 2.

[0048] In summary, this device achieves precise position adjustment of the laser positioner 300 by the quick-adjustment mechanism 200 through the positional arrangement of the rack 202.

[0049] 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.

[0050] 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 best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0051] 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.

[0052] 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 quick positioning fixture for installing locking feet on steel arch frames, characterized in that: include, A steel frame mechanism (100) includes a crossbar (101), both ends of which are connected to telescopic outriggers (102), both ends of which are fitted with quick-adjustment mechanisms (200), both ends of which are connected to brackets (103), and the top of each bracket (103) is provided with a laser positioner (300). The quick-adjustment mechanism (200) includes a sleeve (201), and a rack (202) is arranged parallel to its axial direction on the inner wall of the sleeve (201). The racks (202) are arranged in a ring array about the sleeve (201). The teeth of the racks (202) are staggered along the axial direction of the sleeve (201). Two adjacent racks (202) form a group, and the teeth of two racks (202) in any group are equally spaced along the axial direction of the sleeve (201). A slider (203) is slidably sleeved inside the sleeve (201), and the slider (203) has a groove (203a) matching the rack (202). The groove (203a) has a slot (203b) corresponding to the tooth groove position of the rack (202), and a locking block (205) is inserted into the slot (203b). The slider (203) has a circular hole (203c) along its axial direction, and a lever (204) is sleeved inside the circular hole (203c). The outer wall of the lever (204) is circular in the middle. The positioning groove (204a) is provided, and the lever (204) is symmetrically provided with conical surfaces (203d) on both sides of the positioning groove (204a). Both ends of the lever (204) are provided with retaining edges (204b). Both ends of the lever (204) are provided with springs (206). The top of the locking block (205) matches the tooth groove of the rack (202), and the bottom of the locking block (205) is arc-shaped and matches the outer wall of the lever (204). The locking blocks (205) are connected with spring rings (207).

2. The quick positioning fixture for installing the locking feet of the steel arch frame as described in claim 1, characterized in that: Both sets of telescopic outriggers (102) are perpendicular to the outer wall of the crossbar (101), and the two sets of telescopic outriggers (102) are parallel to each other.

3. The quick positioning fixture for installing the locking feet of the steel arch frame as described in claim 2, characterized in that: The inner arc surface of the bottom end of the card block (205) is provided with a protrusion (205a) matching the positioning groove (204a), and the protrusion (205a) is sleeved with the positioning groove (204a).

4. The quick positioning fixture for installing the locking feet of the steel arch frame as described in claim 3, characterized in that: One end of the lever (204) is connected to the control lever (208), and the outer wall of the control lever (208) is provided with an outer retaining spring (210). The inner wall of the slider (203) away from the control lever (208) is provided with an inner retaining spring (211), and the two sets of springs (206) are respectively pressed and assembled between the inner retaining spring (211) and the retaining edge (204b) of the lever (204), and between the outer retaining spring (210) and the retaining edge (204b) of the lever (204).

5. The quick positioning fixture for installing the locking feet of the steel arch frame as described in claim 4, characterized in that: The lever (204) is made of rubber and is hollow inside. The lever (204) has a slit (204c) in its radial direction between the retaining edge (204b). The slit (204c) is distributed between adjacent locking blocks (205) and is arranged in a ring array about the lever (204).

6. The quick positioning fixture for installing the locking feet of the steel arch frame as described in claim 5, characterized in that: The locking block (205) is located between the retaining edges (204b) of the lever block (204) and is in sliding contact with the lever block (204).

7. The quick positioning fixture for installing the locking feet of the steel arch frame as described in claim 6, characterized in that: An extension rod (209) is slidably sleeved on the outside of the control lever (208), and the outer contour of the cross section of the extension rod (209) is consistent with that of the slider (203). One end of the extension rod (209) is fixedly connected to the slider (203), and the length of the extension rod (209) is less than that of the control lever (208).

8. The quick positioning fixture for installing the locking feet of the steel arch frame as described in claim 7, characterized in that: The bracket (103) connected to the quick-adjustment mechanism (200) is fixedly sleeved on the extension rod (209), and the bracket (103) is provided with a baffle on the side away from the sleeve (201), and the baffle (103a) is sleeved on the end of the control lever (208).

9. The quick positioning fixture for installing the locking feet of the steel arch frame as described in claim 8, characterized in that: The side wall of the bracket (103) and both ends of the crossbar (101) are threaded with hand screws (104), and the hand screws (104) of the bracket (103) are tightened to the crossbar (101) and extension rod (209) connected to the bracket (103), and the hand screws (104) on the crossbar (101) are tightened to the outer wall of the sleeve (201).

10. The quick positioning fixture for installing the locking feet of the steel arch frame as described in claim 9, characterized in that: A level (400) is installed at the middle of the crossbar (101) and pointing upwards.

Images