Shaft bottom structure line measuring positioning device and method

Abstract

The application discloses a kind of shaft bottom structure line measuring positioning device and method, device includes: measuring plate, middle part is provided with horizontal slot along length direction;Support, upper end support leg is movably arranged in horizontal slot, lower end support leg is contained in the support hole that shaft top is correspondingly opened;Centering rod, vertical setting is in the first end of measuring plate End, lower end is equipped with infrared emitter, and the switch of infrared emitter is arranged on centering rod;Control handle, control handle is liftablely arranged in the second end of measuring plate;Trigger lever, trigger lever is movably arranged on measuring plate, and the first end of trigger lever is aligned to the switch of infrared emitter, and driving block is arranged on control handle, driving block can push trigger lever in the process of control handle lifting so that the first end of trigger lever is in contact with switch, and infrared emitter is opened.This kind of measuring positioning device and method are simple in operation, convenient and fast, unnecessary error is reduced, and work efficiency is also improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building engineering, and in particular to a vertical shaft bottom structure line measuring and positioning device and method. BACKGROUND

[0002] After the vertical shaft excavation work is completed, the structure line at the bottom of the vertical shaft needs to be accurately positioned to ensure that the subsequent construction is carried out smoothly.

[0003] There are two traditional vertical shaft positioning methods, one is to hang a steel wire plumb line in the vertical shaft to transmit coordinates from the ground to the well, and to carry out secondary positioning in the well, this method cannot directly position the structure line in the transmission process, and there is an error in the transmission process; the other is to use a total station combined with a prism to position it, this method is easily affected by the depth of the vertical shaft in the positioning process, such as the depth of the vertical shaft being too deep, the area being small, and the total station telescope and the vertical shaft bottom angle being too small to position. SUMMARY

[0004] To effectively solve the above problems existing in the prior art, the present application provides a vertical shaft bottom structure line measuring and positioning device and a vertical shaft measuring and positioning method, which researches and solves the problems of secondary positioning in the well, error in the transmission process, and the total station telescope and the vertical shaft bottom angle being too small to position in the vertical shaft positioning process.

[0005] To this end, the first aspect of the present application adopts the technical solution of: a vertical shaft bottom structure line measuring and positioning device, comprising:

[0006] a measuring plate, a horizontal slot is provided in the middle of the measuring plate along the length direction;

[0007] a support, the upper end of the support is movably arranged in the horizontal slot, and the lower end of the support is accommodated in the support hole corresponding to the vertical shaft top;

[0008] a centering rod, which is vertically arranged at the first end of the measuring plate, an infrared emitter is installed at the lower end of the centering rod, and the switch of the infrared emitter is arranged on the centering rod;

[0009] a control handle, which is movably arranged at the second end of the measuring plate;

[0010] a trigger rod, which is movably arranged on the measuring plate, the first end of the trigger rod is aligned with the switch of the infrared emitter, a driving block is arranged on the control handle, and the driving block can push the trigger rod to make the first end of the trigger rod abut against the switch to turn on the infrared emitter during the lifting of the control handle;

[0011] The trigger rod is arranged inside the measuring plate, the inside of the measuring plate is provided with a first channel for accommodating and horizontally moving the trigger rod, and the second end of the measuring plate is provided with a second channel for vertically inserting the control handle, and the first channel and the second channel are in communication with each other.

[0012] The second channel is provided with an internal thread, and the control handle is correspondingly provided with an external thread, and the control handle and the second channel are screwed with each other through the external thread and the internal thread.

[0013] As an embodiment of the measuring and positioning device, a prism is arranged on the upper end of the centering rod.

[0014] As an embodiment of the measuring and positioning device, a horizontal scale is arranged along the edge of the horizontal groove.

[0015] As an embodiment of the measuring and positioning device, a level bubble is arranged on the upper surface of the measuring plate.

[0016] As an embodiment of the measuring and positioning device, the driving block is an inverted truncated cone with a large upper part and a small lower part, the second end of the trigger rod is provided with a wedge-shaped block with a slope surface matched with the curved surface of the inverted truncated cone, and the inverted truncated cone can push the wedge-shaped block and the trigger rod to move to the end close to the centering rod during the downward movement of the control handle.

[0017] As an embodiment of the measuring and positioning device, a first tension spring is arranged between the first channel and the trigger rod for pulling the trigger rod back to the end close to the control handle.

[0018] As an embodiment of the measuring and positioning device, a second tension spring is arranged between the second channel and the control handle for pulling the control handle back upward.

[0019] The second aspect of the present application adopts the technical scheme of a method for measuring and positioning a vertical shaft bottom structure line, comprising the steps of:

[0020] The support is installed in the support hole at the top of the vertical shaft;

[0021] The measuring plate is installed on the upper end of the support through the horizontal groove;

[0022] The measuring plate is translated or horizontally rotated relative to the upper end, and the position of the centering rod is adjusted to the design horizontal coordinate position of the vertical shaft bottom structure line;

[0023] After the centering rod is adjusted in place, the control handle is lowered, the driving block pushes the trigger rod to move towards the end of the centering rod, until the first end of the trigger rod touches the switch of the infrared emitter, the infrared emitter is turned on, and infrared rays are emitted vertically downward to the bottom of the shaft to loft the position of the structural line at the bottom of the shaft.

[0024] The present application has the following beneficial effects due to the adoption of the above technical solutions:

[0025] The support hole pre-buried on the shaft edge crown beam is used to install and fix the support of the measuring and positioning device, the measuring plate is installed on the support through the horizontal slot formed on the measuring plate, and the measuring plate can be translated and horizontally rotated on the horizontal plane relative to the support through the horizontal slot. The horizontal position of the centering rod on the first end of the measuring plate can be obtained through the horizontal scale arranged on the edge of the horizontal slot, the initial assembly size of the device, and the angle between the measuring plate and the crown beam. The accurate position of the centering rod can be obtained through the total station and the prism on the upper end of the centering rod. Therefore, the centering rod is adjusted to the design horizontal coordinate position of the structural line at the bottom of the shaft. After the centering rod is adjusted in place, the control handle at the second end of the centering rod is moved downward to push the trigger rod to move towards the centering rod until the switch of the infrared emitter on the centering rod is touched. The infrared emitter is turned on, and infrared rays are emitted vertically downward to the bottom of the shaft to loft the position of the structural line at the bottom of the shaft. The measuring and positioning device is simple to operate, convenient, and efficient, and unnecessary errors are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0027] Figure 1 The overall structure schematic diagram of the measuring and positioning device of the structural line at the bottom of the shaft is provided for the embodiments of the present application.

[0028] Figure 2 The use state schematic diagram of the measuring and positioning device of the structural line at the bottom of the shaft is provided for the embodiments of the present application.

[0029] Figure 3 The use state partial enlarged schematic diagram of the measuring and positioning device of the structural line at the bottom of the shaft is provided for the embodiments of the present application.

[0030] Figure 4 The partial enlarged schematic diagram of the measuring plate in the measuring and positioning device of the structural line at the bottom of the shaft is provided for the embodiments of the present application.

[0031] Figure 5 A partial enlarged view of the support in the shaft bottom structure line measuring and positioning device provided by the embodiment of the present application.

[0032] Figure 6 A structure view of the centering rod in the shaft bottom structure line measuring and positioning device provided by the embodiment of the present application.

[0033] Figure 7 A partial enlarged view of the part at A. Figure 6 A partial enlarged view of the part at A. DETAILED DESCRIPTION

[0034] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0035] In the description of the present application, it should be noted that, if the terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like appear, the indicated orientation or position relationship is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, if the terms "first", "second", "third" appear, they are only for description purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connection" appear, they should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] The present application relates to a kind of suitable for the measuring and positioning device of shaft bottom structure line, after shaft excavation work is completed, the structure line of shaft bottom needs to be accurately positioned, to ensure that project is successfully constructed.

[0038] For this purpose, the present application provides a kind of measuring and positioning device of shaft bottom structure line and a kind of measuring and positioning method of shaft bottom structure line, for the secondary positioning in well, there is error in transmission process, total station telescope and the elevation of shaft bottom are too small to be positioned.The problem is researched and solved.

[0039] The technical solutions of the present application will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0040] Referring to Figures 1-3 , Figure 1 The overall structural schematic diagram of the measuring and positioning device for the shaft bottom structure line provided by the embodiment of the present application, Figure 2 The use state schematic diagram of the measuring and positioning device for the shaft bottom structure line provided by the embodiment of the present application, Figure 3 The use state partial enlarged schematic diagram of the measuring and positioning device for the shaft bottom structure line provided by the embodiment of the present application.

[0041] As Figures 1-3 The measuring and positioning device for the shaft bottom structure line provided by the embodiment mainly comprises a measuring plate 11, a support 12, a centering rod 13, an infrared emitter 14, a control handle 15 and a trigger rod 16.

[0042] The measuring plate 11 is an elongated rectangular plate, and a horizontal groove 111 is arranged in the middle of the measuring plate 11 along the length direction. Preferably, a horizontal scale can be arranged along the edge of the horizontal groove 11. The length of the measuring plate inserted into the shaft interior can be measured conveniently. The measuring plate 11 can be made of light aluminum alloy material.

[0043] Referring to Figure 5 The partial enlarged schematic diagram of the support in the measuring and positioning device for the shaft bottom structure line provided by the embodiment of the present application is shown in the figure. The support 12 is composed of three “L” shaped lower end legs 122 and an upper end leg 121 arranged vertically. The bottoms of the three “L” shaped lower end legs 122 are opened, and the tops are connected together, forming a triangular support form. Preferably, the three “L” shaped lower end legs 122 can be made of steel bars with a diameter of φ15 mm, and the upper end leg 121 can be made of a bolt with a diameter of φ20 mm and a height of 80 mm. The lower end of the upper end leg 121 is welded and fixed on the top of the three lower end legs 122, the upper end of the upper end leg 121 is vertically upward, and the lower end of the lower end leg 122 is downward. When the measuring plate 11 is used, it is installed on the upper end leg 121 of the support 12 through the horizontal groove 111. The upper end leg 121 can move relatively along the horizontal groove 111, and the measuring plate 11 can also rotate horizontally around the upper end leg 121. Therefore, the horizontal position of the measuring plate 11 can be adjusted by translating or rotating horizontally the measuring plate 11 relative to the upper end leg 121.

[0044] Referring to Figure 2 and Figure 3A crown beam 20 is arranged at the top of the shaft, and a bracket hole 21 for accommodating the lower end foot 121 of the bracket 12 is formed in the crown beam 20. Three bracket holes 21 form a group, and correspond to the three "L"-shaped lower end feet 122. A plurality of groups of bracket holes 21 can be arranged on the crown beam 20, so that the bracket 12 can be selectively arranged at different positions. The depth of the bracket hole 21 is consistent with the height of the lower end foot 122. Therefore, after the lower end foot 122 is arranged in the bracket hole 21, the measuring plate 11 can be placed on the upper surface of the crown beam 20, and the measuring plate 11 is supported by the crown beam 20. After the bracket 12 is arranged in the corresponding bracket hole 21 of the crown beam 20 through the lower end foot 122, the bracket 12 is arranged relative to the crown beam 20, and can serve as a reference when the measuring plate 11 moves. The upper surface of the measuring plate 11 is also provided with a level bubble 112, so as to facilitate control of the levelness of the measuring plate 11. When the level bubble 112 shows that the measuring plate 11 is not level, a cushion layer can be arranged between the bottom of the measuring plate 11 and the crown beam to adjust the height.

[0045] Referring to Figure 6 and Figure 7 , Figure 6 the structure diagram of the centering rod in the measuring and positioning device for the shaft bottom structure line provided by the embodiment of the present application, Figure 7 for Figure 6 the local enlarged diagram of the part A, as shown in the figure, the centering rod 12 is vertically arranged at the first end of the measuring plate 11, and the first end of the measuring plate 11 extends into the shaft when in use. The centering rod 12 is arranged above the shaft mouth, and an infrared emitter 14 is arranged at the lower end of the centering rod 12. The switch of the infrared emitter 14 is arranged on the centering rod 13. The infrared emitter 14 vertically downward emits infrared rays to the shaft bottom when in use, and the position of the shaft bottom structure line is lofted. The centering rod 12 is preferably made of light aluminum alloy material, and the diameter is φ30mm. The infrared emitter 14 is arranged at the bottom of the centering rod 12, and the triangular taper nut 142 is screwed to serve as a general prism centering rod for positioning measurement. The infrared emitter 14 and the switch 141 thereof are connected through a wire 123, and the bottom of the centering rod 11 is provided with an "L"-shaped wire channel for the wire 123. The infrared emitter 14 is arranged directly below the centering rod 11, and the switch 141 is arranged on the side of the centering rod 11 and close to the position of the infrared emitter 14. The switch 141 is a contact switch, which is started and opens the infrared emitter 14 when touched.

[0046] Referring to Figure 4The local enlarged view of the measuring plate in the measuring and positioning device for the shaft bottom structure line provided by the embodiment of the present application. The control handle 15 is vertically arranged at the second end of the measuring plate 11. The control handle 15 is preferably made of aluminum alloy, with a length of 3000mm, a width of 200mm and a height of 500mm. The lower end of the control handle 15 is provided with a driving block 151 which can be raised or lowered along with the control handle. The second channel is arranged at the second end of the measuring plate 11 for vertically inserting the control handle 15. The control handle 15 is vertically inserted into the second channel, and the lifting structure for lifting the control handle 15 is arranged between the control handle 15 and the second channel. The lifting structure can be an elastic pressing structure or a screw rotating structure.

[0047] When the lifting structure is the elastic pressing structure, a second tension spring (not shown in the figure) is arranged between the control handle 15 and the second channel. When the control handle 15 is pressed downward, the control handle 15 is lowered relative to the measuring plate 11. When the control handle 15 is released, the second tension spring pulls the control handle upward, so that the control handle 15 is raised relative to the measuring plate 11.

[0048] When the lifting structure is the screw rotating structure, an inner thread is arranged in the second channel, and an outer thread is correspondingly arranged on the control handle 15. The control handle 15 and the second channel are screwed with each other through the outer thread and the inner thread. By rotating the control handle 15 in different directions, the control handle 15 is raised or lowered relative to the measuring plate 11. Figure 1 As shown in the figure, the level bubble 112 is arranged near the control handle 15, which is convenient for observation and control. An operation disc 152 is arranged on the top of the control handle 15, which is convenient for pressing or rotating the control handle 15. A sleeve 153 is arranged outside the upper end of the measuring plate 11, and the height of the sleeve 153 is lower than the height of the upper end of the control handle 15 exposed from the measuring plate 11, so as to affect the normal pressing of the control handle 15. The lower end of the sleeve 153 is pressed against the upper surface of the measuring plate 11. The sleeve 153 can fix the upper end of the control handle 15, so as to avoid the swing of the upper end of the control handle 15, and keep the control handle 15 in the vertical state.

[0049] Furthermore, when the control handle 15 is raised or lowered by the screw rotating structure, a circular scale 154 is arranged on the upper surface of the measuring plate 11 and centered on the control handle 15. A pointer (not shown in the figure) is correspondingly arranged on the control handle 15. In the initial state, the pointer is kept a certain distance from the upper surface of the measuring plate 11, so as to avoid affecting the normal lowering of the control handle 15. When the control handle 15 is rotated, the scale change of the pointer on the circular scale 154 is observed, so as to obtain the actual length value of the control handle 15 lowered.

[0050] The trigger rod 16 is horizontally movable on the measuring plate 11. The first end of the trigger rod 16 is aligned with the switch 141 of the infrared transmitter 14. The control handle 15 is provided with a drive block 151. During the raising and lowering of the control handle 15, the drive block 151 can push the trigger rod 16 so that the first end of the trigger rod 16 touches the switch 141 of the infrared transmitter 14, turning on the infrared transmitter 14. The infrared transmitter 14 emits infrared rays vertically downward to the bottom of the shaft, laying out the position of the structural line at the bottom of the shaft.

[0051] In this embodiment, the trigger rod 16 is disposed inside the measuring plate 11. The measuring plate 11 has a first channel for accommodating and horizontally moving the trigger rod 16. The second end of the measuring plate 11 has a second channel for vertically inserting the control handle 15. The first channel and the second channel are interconnected, forming a large space at their intersection to accommodate and allow the drive block 151 at the lower end of the control handle 15 to move vertically. Figure 4 As shown, the drive block 151 is an inverted truncated cone, wider at the top and narrower at the bottom. The second end of the trigger rod 16 has a wedge-shaped block 161 whose inclined surface fits against the curved surface of the inverted cone. As the control handle 15 moves downwards, the inverted cone pushes against the wedge-shaped block 161, moving the trigger rod 16 towards the end closer to the centering rod 13, until the first end of the trigger rod 16 contacts the switch 141 of the infrared emitter 14. Preferably, a contact 162 is provided at the first end of the trigger rod 16 to facilitate aiming and contacting the switch 141 of the infrared emitter 14.

[0052] A first tension spring (not shown in the figure) is provided between the first channel inside the measuring plate 11 and the trigger rod 16 to pull the trigger rod 16 back towards the end of the control handle 15. This first tension spring can be sleeved on the outside of the trigger rod 16 and connected to the channel wall of the first channel. After the infrared transmitter completes the layout operation, the control handle 15 can be raised to contact its drive block 151 to push the trigger rod 16. The first tension spring moves the trigger rod 16 away from the centering rod 13, disengaging it from the switch 141 of the infrared transmitter 14. The switch 141 closes, and the infrared transmitter 14 stops layout. For the next layout, the control handle is lowered again to trigger the infrared transmitter 14 to work. The measurement and positioning device of this invention is simple to operate, convenient and quick, reduces unnecessary errors, and improves work efficiency.

[0053] Furthermore, the measuring and positioning device of the present invention also includes a total station and a prism 17, which are set on the top of the centering rod 13 for accurately positioning the position of the centering rod 13.

[0054] The following describes a method for measuring and locating the bottom structural line of a shaft using a measuring and locating device provided in the above embodiments. The method mainly includes the following steps:

[0055] Step one, install the support 12 through its lower end foot 122 in the support hole 21 of the crown beam 20 at the top of the shaft;

[0056] Step two, install the measuring plate 11 through the horizontal slot 111 on it on the upper end foot 121 of the support 12;

[0057] Step two, translate or horizontally rotate the measuring plate relative to the upper end foot 121, adjust the position of the centering rod 13 to the design horizontal coordinate position of the shaft bottom structure line, and the adjustment process can be accurately measured and positioned by using the total station and the prism 17;

[0058] Step three, after the centering rod 13 is adjusted in place, lower the control handle 15, so that the driving block 151 at the lower end thereof pushes the trigger rod 16 to move towards the end close to the centering rod 13, until the first end of the trigger rod 16 abuts against the switch 141 of the infrared emitter 14, the infrared emitter 14 is opened, and the infrared emitter 14 vertically downward emits infrared rays to the shaft bottom, to loft the position of the shaft bottom structure line, and the positioning is completed.

[0059] The vertical shaft bottom structure line measuring and positioning device provided by the application adopts a support hole pre-buried on the crown beam at the edge of the shaft, installs and fixes the support of the measuring and positioning device, installs the measuring plate on the support through the horizontal slot formed on the measuring plate, and the measuring plate can be translated and horizontally rotated on the horizontal plane relative to the support through the horizontal slot. Through the horizontal scale provided on the edge of the horizontal slot, the initial assembly size of the device, and the angle between the measuring plate and the crown beam, the horizontal position of the centering rod on the first end of the measuring plate can be obtained, and the accurate position of the centering rod can also be obtained through the total station and the prism at the upper end of the centering rod. Therefore, the centering rod is adjusted to the design horizontal coordinate position of the shaft bottom structure line. After the centering rod is adjusted in place, the control handle at the second end of the centering rod is moved downward, the trigger rod is pushed to move towards the centering rod, until the switch of the infrared emitter on the centering rod is abutted against, the infrared emitter is opened, and the infrared rays are vertically downward emitted to the shaft bottom, to loft the position of the shaft bottom structure line. The measuring and positioning device is simple in operation, convenient and fast, unnecessary errors are reduced, and the work efficiency is improved.

[0060] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application, and should be included in the protection scope of the application.

[0061] The technology, shape, and structural parts not described in detail in the present application are all known technology.

Claims

1. A measuring and positioning device for the structural line at the bottom of a vertical shaft, characterized in that, include: A measuring plate, wherein a horizontal groove is provided in the middle of the measuring plate along the length direction; The bracket has an upper support leg movably disposed in the horizontal groove, and a lower support leg accommodated in a bracket hole correspondingly opened at the top of the shaft. A centering rod is vertically installed at the first end of the measuring plate. An infrared transmitter is installed at the lower end of the centering rod, and the switch of the infrared transmitter is located on the centering rod. A control handle, which is vertically and flexibly mounted at the second end of the measuring plate; An operating disc can be installed on the top of the control handle to facilitate rotation of the control handle; a sleeve is fitted on the outside of the upper end of the control handle that extends out of the measuring plate. The height of the sleeve is lower than the height of the upper end of the control handle that extends out of the measuring plate, so as to affect the control handle. The lower end of the sleeve presses against the upper surface of the measuring plate. The sleeve can fix the upper end of the control handle, prevent the upper end of the control handle from swaying, and keep the control handle in a vertical position. A trigger rod is horizontally movable on the measuring plate. The first end of the trigger rod is aligned with the switch of the infrared emitter. A drive block is provided on the control handle. During the raising and lowering of the control handle, the drive block can push the trigger rod so that the first end of the trigger rod abuts against the switch, thereby turning on the infrared emitter. The trigger rod is disposed inside the measuring plate, and the measuring plate has a first channel for receiving and horizontally moving the trigger rod. The second end of the measuring plate has a second channel for vertically inserting the control handle. The first channel and the second channel are interconnected. The second channel is provided with an internal thread, and the control handle is provided with an external thread. The control handle and the second channel are screwed together by the external thread and the internal thread. It also includes a total station, with a prism installed at the upper end of the centering rod; The infrared transmitter is mounted at the bottom of the centering rod and tightened with a triangular cone nut, functioning as a standard prism centering rod for positioning and measurement. The infrared transmitter and its switch are connected via a wire. An "L"-shaped wire channel is provided at the bottom of the centering rod for the wire to pass through. The infrared transmitter is positioned directly below the centering rod, and the switch is located on the side of the rod, near the infrared transmitter. The switch is a contact switch; when touched, it activates the infrared transmitter, causing it to emit infrared light.

2. The measuring and positioning device for the structural line at the bottom of the shaft as described in claim 1, characterized in that, A horizontal scale is provided along the edge of the horizontal groove.

3. The measuring and positioning device for the structural line at the bottom of the shaft as described in claim 1, characterized in that, A level bubble is provided on the upper surface of the measuring plate.

4. The measuring and positioning device for the structural line at the bottom of the shaft as described in claim 1, characterized in that, The drive block is an inverted truncated cone that is larger at the top and smaller at the bottom. The second end of the trigger rod is provided with a wedge-shaped block whose inclined surface fits into the curved surface of the inverted truncated cone. As the control handle moves downward, the inverted truncated cone can push the wedge-shaped block, causing the trigger rod to move towards the end closer to the centering rod.

5. The measuring and positioning device for the structural line at the bottom of the shaft as described in claim 4, characterized in that, A first tension spring is provided between the first channel and the trigger rod for pulling the trigger rod back towards the end closer to the control handle.

6. The measuring and positioning device for the structural line at the bottom of the shaft as described in claim 4, characterized in that, A second tension spring is provided between the second channel and the control handle for pulling the control handle upward.

7. A method for measuring and locating the bottom structural line of a shaft using the measuring and locating device for the bottom structural line of a shaft as described in any one of claims 1 to 6, characterized in that, Including the following steps: The bracket is installed in the bracket hole at the top of the shaft; The measuring plate is mounted on the upper support leg of the bracket through a horizontal groove; The measuring plate is translated or rotated horizontally relative to the upper support leg, and the position of the centering rod is adjusted to the designed horizontal coordinate position of the bottom structural line of the shaft; After the centering rod is adjusted to the correct position, the control handle is lowered, causing the drive block to push the trigger rod towards the end closer to the centering rod, until the first end of the trigger rod touches the switch of the infrared emitter, turning on the infrared emitter. The infrared emitter emits infrared rays vertically downward to the bottom of the shaft, marking out the position of the structural line at the bottom of the shaft.

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