A tripod for mining engineering surveying

Abstract

This utility model discloses a tripod for mining engineering surveying, including a fixed platform, fixed legs, movable legs, and an equipment fixing screw. The tripod also includes: a suspension positioning device mounted on the equipment fixing screw to center the fixed platform when placing the tripod; a counterweight device mounted on the movable legs to increase the weight of the fixed and movable legs, reducing the impact of vibration on the tripod's accuracy during use; an auxiliary support device mounted on the movable legs to assist in supporting the fixed legs when the counterweight device is installed; and a triangular fixing device located below the movable legs. The suspension positioning device of this utility model uses a plumb bob with a plumb line to quickly determine the center position of the fixed platform when placing the tripod. Surveyors adjust the tripod according to ground markings until the plumb bob is stationary directly above the measurement point, achieving rapid and accurate positioning, reducing the time and effort spent searching for a suitable location, and improving measurement efficiency.

Description

Technical Field

[0001] This utility model relates to the field of engineering surveying technology, specifically to a tripod for mining engineering surveying. Background Technology

[0002] In the field of mining engineering surveying, tripods are important surveying tools widely used in topographic mapping, geological exploration, and other scenarios. Most existing tripods employ a design with fixed and movable legs, allowing for adjustment of the movable legs to adapt to different ground conditions and ensure the stability and accuracy of the surveying equipment. However, existing tripods still have some shortcomings in practical use.

[0003] Existing tripods require aligning the laser point of the measuring device with the measurement point during positioning. This typically relies on the surveyor's visual inspection and experience to adjust the tripod's position. This method is not only time-consuming but also prone to errors in complex terrain, leading to unstable measurement accuracy. Furthermore, the mining survey environment is complex, with potentially soft or unstable ground. Traditional tripods have limited support area and are easily displaced due to uneven ground or vibrations, affecting the accuracy of the measurement results. In scenarios requiring long-term measurements or high precision, existing lightweight tripods lack sufficient stability and cannot effectively resist environmental vibrations, resulting in decreased measurement accuracy. Heavy-duty tripods, on the other hand, are inconvenient to carry and unsuitable for rapid measurement. Therefore, a new tripod for mining engineering surveying is proposed. Utility Model Content

[0004] To address the problems of inaccurate positioning, poor stability, and decreased measurement accuracy due to uneven ground or vibration in complex terrain conditions during mine surveying, as well as the limitation of existing tripods in meeting both stability and portability requirements and their narrow applicability, this utility model provides a tripod for mining engineering surveying.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] A tripod for mining engineering surveying includes a fixed platform, fixed legs, movable legs, and equipment fixing screws. The tripod also includes:

[0007] The suspension positioning device is installed on the equipment fixing screw and is used to position the center position of the fixing platform when placing the tripod;

[0008] The counterweight device, installed on the movable leg, is used to increase the weight of the fixed leg and the movable leg, reducing the impact of vibration on the accuracy of the tripod during use;

[0009] An auxiliary support device is installed on the movable foot. When the counterweight device is installed, the auxiliary support device is used to assist in supporting the fixed foot.

[0010] The triangular fixing device is located below the movable foot, providing a flat and stable support surface for the movable foot.

[0011] Preferably, the fixing foot consists of a fixing rod, a hinge joint, a fixing block, and a first fastening bolt. The fixing block is fixedly installed at both ends of the fixing rod, the hinge joint is fixedly installed on one of the fixing blocks, the fixing block is rotatably connected to the fixing platform through the hinge joint, and the first fastening bolt is threadedly installed on the other fixing block.

[0012] Preferably, the movable foot consists of a movable plate and a conical foot. The movable plate is slidably installed in the fixed block on which the first fastening bolt is installed, and the movable plate slides between two fixed rods. The conical foot is fixedly installed at the end of the movable plate away from the fixed platform.

[0013] Preferably, the suspension positioning device includes:

[0014] The first internal threaded hole is opened inside the equipment fixing screw;

[0015] A threaded sleeve is threaded into a first internal threaded hole, and a second internal threaded hole is opened inside the threaded sleeve. A through hole is opened through the center of the threaded sleeve.

[0016] A threaded cylindrical block, with threads installed inside the second internal threaded hole.

[0017] Preferably, the suspension positioning device further includes:

[0018] A plumb block, on which a plumb line is fixedly connected. The diameter of the plumb line is smaller than the diameter of the thread hole.

[0019] Preferably, the counterweight device includes:

[0020] Counterweight, with a locking block fixedly installed on it;

[0021] The slide and the slot are both formed on the movable plate and are connected. The slide is formed inside the movable plate and the slot is formed from the outer surface of the movable plate.

[0022] Preferably, the auxiliary support device includes:

[0023] The screw is slidably mounted inside the movable plate;

[0024] Auxiliary rods, one end of which is rotatably mounted on the screw, are located on the same screw on the same side. Two auxiliary rods are rotatably mounted, and the two auxiliary rods are located on the two sides of the movable plate respectively.

[0025] Nuts are threaded onto the screw from both ends.

[0026] Preferably, the auxiliary support device further includes:

[0027] A slot is formed through the movable plate, and a screw is slidably installed in the slot.

[0028] Preferably, the triangular fixing device includes:

[0029] The fixed plate has a central slot at its center and countersunk holes arranged in a circular array on its circumference.

[0030] The insert rod is slidably installed inside the countersunk socket, with the tip of the insert rod facing downwards during installation.

[0031] The beneficial effects of this utility model are as follows:

[0032] (I) The suspension positioning device of this utility model uses a plumb block with a plumb line to quickly determine the center position of the fixed platform when the tripod is placed. The surveyor adjusts the tripod according to the ground markings until the plumb block is stationary directly above the measurement point, achieving rapid and accurate positioning, reducing the time and effort spent finding a suitable position, and improving measurement efficiency.

[0033] (II) This utility model's triangular fixing device, in conjunction with a fixing plate and a plug, provides a stable support plane for the tripod. The fixing plate increases the contact area between the cone foot and the ground, distributing the force; the plug is inserted into the soil to prevent the tripod from shifting due to vibration. In the softer soil layers of mines, it effectively prevents the cone foot from sinking into the soil and changing its horizontal position, ensuring the stability and measurement accuracy of the measuring instrument after placement.

[0034] (III) The main body of the tripod of this utility model can be made of aluminum alloy, which is lightweight and easy to carry, meeting the needs of short-term measurement. The counterweight device and auxiliary support device can be selected according to the actual measurement environment and needs, realizing the flexible application of the tripod in different measurement scenarios. When carrying, each device can be stored separately, and the tripod can be easily transported after being folded up, improving the convenience of carrying. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of the device in use.

[0036] Figure 2 This is a three-dimensional structural diagram of the tripod of this utility model;

[0037] Figure 3 This is an exploded structural diagram of the tripod of this utility model;

[0038] Figure 4 This is a cross-sectional structural schematic diagram of the suspension positioning device of this utility model;

[0039] Figure 5 This is a partially exploded schematic diagram of the suspension positioning device of this utility model;

[0040] Figure 6This is an exploded structural diagram of the auxiliary support device of this utility model;

[0041] Figure 7 This is a cross-sectional exploded view of the counterweight device of this utility model;

[0042] Figure 8 This is an exploded structural diagram of the triangular fixing device of this utility model.

[0043] Reference numerals: 1. Fixed platform; 2. Fixed foot; 3. Movable foot; 4. Equipment fixing screw; 5. Suspension positioning device; 6. Counterweight device; 7. Auxiliary support device; 8. Triangular fixing device; 20. Fixed rod; 21. Hinge joint; 22. Fixed block; 23. First fastening bolt; 30. Movable plate; 31. Conical foot; 50. First internal threaded hole; 51. Threaded sleeve; 52. Through hole; 53. Second internal threaded hole; 54. Threaded cylindrical block; 55. Vertical line; 56. Vertical block; 60. Counterweight block; 61. Slot; 62. Locking block; 63. Slide groove; 70. Slot; 71. Screw; 72. Auxiliary insertion rod; 73. Nut; 80. Fixed plate; 81. Center slot; 82. Countersunk insertion hole; 83. Insertion rod. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0046] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that provides control.

[0048] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] Example 1: Refer to Figures 1-8 A tripod for mining engineering surveying includes a fixed platform 1, fixed legs 2, movable legs 3, and equipment fixing screws 4. To design a tripod that is easy to position and suitable for mining surveying environments, the tripod also includes:

[0050] The suspension positioning device 5 is installed on the equipment fixing screw 4 and is used to position the center position of the fixing platform 1 when the tripod is placed.

[0051] The counterweight device 6 is installed on the movable leg 3 to increase the weight of the fixed leg 2 and the movable leg 3, thereby reducing the impact of vibration on the accuracy of the tripod during use.

[0052] The auxiliary support device 7 is installed on the movable foot 3. When the counterweight device 6 is installed, the auxiliary support device 7 is used to assist in supporting the fixed foot 2.

[0053] The triangular fixing device 8 is located below the movable foot 3, providing a flat and stable support surface for the movable foot 3.

[0054] To provide support for the tripod base, the fixed foot 2 consists of a fixed rod 20, a hinge joint 21, a fixed block 22, and a first fastening bolt 23. The fixed block 22 is fixedly installed at both ends of the fixed rod 20, and the hinge joint 21 is fixedly installed on one of the fixed blocks 22. The fixed block 22 is rotatably connected to the fixed platform 1 through the hinge joint 21. The first fastening bolt 23 is threadedly installed on the other fixed block 22. The movable foot 3 consists of a movable plate 30 and a conical foot 31. The movable plate 30 is slidably installed within the fixed block 22 on which the first fastening bolt 23 is installed, and the movable plate 30 slides between the two fixed rods 20. The conical foot 31 is fixedly installed at the end of the movable plate 30 away from the fixed platform 1.

[0055] To facilitate positioning the center of the fixed platform 1 when placing the tripod, the suspension positioning device 5 includes: a first internal threaded hole 50, which is formed inside the equipment fixing screw 4; a threaded sleeve 51, which is threaded into the first internal threaded hole 50, and has a second internal threaded hole 53 inside, with a through hole 52 at the center of the threaded sleeve 51; and a threaded cylindrical block 54, which is threaded into the second internal threaded hole 53. The suspension positioning device 5 also includes: a plumb block 56, on which a plumb line 55 is fixedly connected, the diameter of the plumb line 55 being smaller than the diameter of the through hole 52.

[0056] When carrying, the suspension positioning device 5, counterweight device 6, auxiliary support device 7, and triangular fixing device 8 should be separated from the tripod. The suspension positioning device 5, counterweight device 6, auxiliary support device 7, and triangular fixing device 8 should be placed separately in the storage box for carrying. The movable leg 3 of the tripod should be slid back into the fixed leg 2, and the four fixed legs 2 should be folded together for easy carrying. When carrying, one person can hold the stored tripod, while another person carries the storage box and the measuring instrument storage box, so as to distribute the weight and avoid one person carrying too much material.

[0057] Upon arrival at the measurement site, unfold the tripod and place it on the ground. First, locate the measurement points. Remove the plumb block 56 with the plumb line 55, and remove the equipment fixing screw 4. Unscrew the threaded sleeve 51 from the equipment fixing screw 4, and then unscrew the threaded cylindrical block 54 from the threaded sleeve 51. Pass one end of the plumb line 55 through the thread hole 52 and pull it out. At this point, screw the threaded cylindrical block 54 back into the second internal thread hole 53. The plumb line 55 is then fixed to the equipment fixing screw by the threaded cylindrical block 54 and the threaded sleeve 51. 4. At this point, screw the device fixing screw 4 back onto the fixing platform 1. The center position of the fixing platform 1 can be easily and quickly determined by the plumb block 56 suspended on the plumb line 55. Adjust the position of the tripod according to the mark on the ground until the plumb block 56 is directly above the measurement point when it is suspended and stationary. When observing through the plumb block 56, it is necessary to ensure that the plumb block 56 is in a vertical and stationary state. If the plumb block 56 shakes after adjusting the tripod, the plumb line 55 can be manually limited to reduce its shaking amplitude until it stops.

[0058] In order to ensure that the tripod can be used stably in the soft soil of the mine, the tripod fixing device 8 includes: a fixing plate 80, a central slot 81 is opened in the center of the fixing plate 80, and countersunk insertion holes 82 are arranged in a circular array on the fixing plate 80; and a insertion rod 83, which is slidably installed in the countersunk insertion holes 82, with the tip of the insertion rod 83 facing down when installed.

[0059] When setting up the fixed platform, after determining the center position of the fixed platform 1, place the fixed plate 80 on the ground according to the position of the three conical feet 31 of the tripod, and make sure that the conical feet 31 are in the center slot 81. After determining the position of the fixed plate 80, insert the insertion rod 83 into the countersunk insertion hole 82, with the tip of the insertion rod 83 facing down. If the soil layer is hard, you can use a tool to hammer the insertion rod 83 into the soil. After the insertion rod 83 enters the soil, it will limit the fixed plate 80 in four directions, which can prevent the tripod from shifting due to vibration during use. The fixed plate 80 increases the contact area between the conical feet 31 and the ground. When the measuring instrument is placed on the fixed platform 1, compared with the original direct contact of the conical feet 31 with the ground, the fixed plate 80 can distribute the force and avoid the increased weight caused by placing the measuring instrument, which would cause the conical feet 31 to sink into the soil and change the horizontal position of the tripod.

[0060] Example 2: Refer to Figure 7 In order to enable the tripod to be used for both short-term and long-term measurement scenarios and to minimize its weight, the counterweight device 6 includes: a counterweight block 60, on which a locking block 62 is fixedly installed; a sliding groove 63 and a locking slot 61, both of which are formed on the movable plate 30, and are connected to each other. The sliding groove 63 is formed inside the movable plate 30, and the locking slot 61 is formed from the outer surface of the movable plate 30.

[0061] The fixed platform 1, fixed feet 2, and movable feet 3 of this device are preferably made of aluminum alloy. Tripods made of aluminum alloy are lightweight, easy to carry, and suitable for short-term measurements. When the environmental vibration has a significant impact, or when long-term accurate measurements are required, after completing the above positioning operation, the counterweight 60 is taken out of the storage box and inserted into the slot 61 by the locking block 62. First, the locking block 62 is placed into the sliding groove 63, and then the counterweight 60 is pulled down to allow the locking block 62 to enter the slot 61, thus completing the installation. The counterweight 60 is preferably made of solid metal or solid wood. After the counterweight 60 is installed, it can increase the weight of the three legs of the tripod. When the weight of the three legs of the tripod increases, the impact of environmental vibration on the stability of the tripod will be reduced accordingly. Sufficient weight can reduce the resonance of the support.

[0062] Before carrying the device, the counterweight device 6 can be selectively carried according to the actual measurement environment and measurement needs. If the measurement site is good and there is no vibration, and there is no need for long-term high-precision measurement, the counterweight device 6 can be omitted to reduce the load. The other features are the same as in Example 1.

[0063] Example 3: Refer to Figure 6To ensure the strength of the movable plate 30 after the tripod is equipped with the counterweight device 6, the auxiliary support device 7 includes: a screw 71, which is slidably installed inside the movable plate 30; two auxiliary rods 72, one end of which is rotatably installed on the screw 71, located on the same side of the same screw 71, with the two auxiliary rods 72 located on opposite sides of the movable plate 30; and nuts 73, which are threaded onto the screw 71 from both ends. The auxiliary support device 7 also includes: a slot 70, which is formed through the movable plate 30, and the screw 71 is slidably installed inside the slot 70.

[0064] To ensure proper stress distribution on the movable plate 30, the auxiliary support device 7 can be removed from the storage box. The screw 71 is inserted into the slot 70, and the round end of the auxiliary rod 72 is inserted into both ends of the screw 71, so that the tip of the auxiliary rod 72 touches the ground. The auxiliary rod 72 is rotated to adjust its angle, so that when the tip of the auxiliary rod 72 is inserted into the ground, the auxiliary rod 72 and the movable plate 30 form a "Λ" shape. This provides auxiliary support for the movable plate 30 and prevents excessive local stress from damaging the movable plate 30 after the counterweight 60 is added.

[0065] Similarly, if the actual measurement environment does not require carrying the counterweight device 6, the auxiliary support device 7 is also not required, and the remaining features are the same as in Example 1.

[0066] Working principle: When carrying, the suspension positioning device 5, counterweight device 6, auxiliary support device 7, and triangular fixing device 8 should be separated from the tripod. These components should be placed separately in the storage box for carrying. The movable leg 3 of the tripod should be slid back into the fixed leg 2, and the four fixed legs 2 should be folded together for easy carrying. Upon arrival at the measurement site, the tripod should be unfolded and placed on the ground. First, locate the measurement point. Remove the plumb block 56 with the plumb line 55, and remove the equipment fixing screw 4. After unscrewing the threaded sleeve 51 from the equipment fixing screw 4, unscrew the threaded cylindrical block 54 from the threaded sleeve 51. Then, place one end of the plumb line 55 from... After the wire is passed through the threaded hole 52 and pulled out, the threaded cylindrical block 54 is screwed back into the second internal threaded hole 53. The plumb line 55 is then fixed to the equipment fixing screw 4 by the threaded cylindrical block 54 and the threaded sleeve 51. The equipment fixing screw 4 is then screwed back onto the fixing platform 1. The center position of the fixing platform 1 can be easily and quickly determined by the plumb block 56 suspended on the plumb line 55. The position of the tripod is adjusted according to the markings on the ground until the plumb block 56 is directly above the measurement point when it is suspended and stationary. When observing through the plumb block 56, it is necessary to ensure that the plumb block 56 is in a vertical and stationary state. If the plumb block 56 shakes after adjusting the tripod, the plumb line 55 can be manually limited to reduce its shaking amplitude until it stops. Then, a fixed platform can be built. After determining the center position of the fixed platform 1, the fixed plate 80 is placed on the ground according to the position of the three conical feet 31 of the tripod, and the conical feet 31 are located in the center slot 81. After determining the position of the fixed plate 80, the insertion rod 83 is inserted into the countersunk insertion hole 82, with the tip of the insertion rod 83 facing down. If the soil layer is hard, the insertion rod 83 can be hammered into the soil with a tool. After the insertion rod 83 is in the soil, it will limit the fixed plate 80 in four directions, which can prevent the tripod from shifting due to vibration during use. The fixed plate 80 increases the contact area between the conical feet 31 and the ground. When the measuring instrument is placed on the fixed platform 1, compared with the original direct contact of the conical feet 31 with the ground, the fixed plate 80 can distribute the force and avoid the increase in weight caused by placing the measuring instrument, which would cause the conical feet 31 to sink into the soil and change the horizontal position of the tripod.

[0067] The fixed platform 1, fixed feet 2, and movable feet 3 of this device are preferably made of aluminum alloy. Tripods made of aluminum alloy are lightweight, easy to carry, and suitable for short-term measurements. When the environmental vibration has a significant impact, or when long-term accurate measurements are required, after completing the above positioning operation, the counterweight 60 is taken out of the storage box and inserted into the slot 61 by the locking block 62. First, the locking block 62 is placed into the sliding groove 63, and then the counterweight 60 is pulled down to allow the locking block 62 to enter the slot 61, thus completing the installation. The counterweight 60 is preferably made of solid metal or solid wood. After the counterweight 60 is installed, it can increase the weight of the three legs of the tripod. When the weight of the three legs of the tripod increases, the impact of environmental vibration on the stability of the tripod will be reduced accordingly. Sufficient weight can reduce the resonance of the support.

[0068] Since the counterweight 60 is attached to the movable plate 30, in order to ensure that the movable plate 30 is subjected to good force, the auxiliary support device 7 can be taken out from the storage box, the screw 71 can be inserted into the slot 70, and the round end of the auxiliary rod 72 can be inserted into both ends of the screw 71, so that the tip of the auxiliary rod 72 touches the ground. Rotate the auxiliary rod 72 to adjust its angle, so that when the tip of the auxiliary rod 72 is inserted into the ground, the auxiliary rod 72 and the movable plate 30 are in a "Λ" shape. In this way, the auxiliary rod 72 provides auxiliary support for the movable plate 30, and avoids excessive local stress caused by the addition of the counterweight 60 to the movable plate 30, which could damage the movable plate 30.

[0069] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tripod for mining engineering surveying, comprising a fixed table (1), fixed legs (2), movable legs (3) and a device fixing screw (4), characterized in that: The tripod also includes: The suspension positioning device (5) is installed on the equipment fixing screw (4) and is used to position the center position of the fixing platform (1) when the tripod is placed. The counterweight device (6) is set on the movable foot (3) to increase the weight of the fixed foot (2) and the movable foot (3) and reduce the impact of vibration on the accuracy of the tripod during use; An auxiliary support device (7) is installed on the movable foot (3). When the counterweight device (6) is installed, the auxiliary support device (7) is used to assist in supporting the fixed foot (2). The triangular fixing device (8) is set below the movable foot (3) to provide a flat and stable support plane for the movable foot (3).

2. A tripod for mining engineering surveying according to claim 1, characterised in that, The fixed foot (2) consists of a fixed rod (20), a hinge joint (21), a fixed block (22) and a first fastening bolt (23). The fixed block (22) is fixedly installed at both ends of the fixed rod (20), and the hinge joint (21) is fixedly installed on one of the fixed blocks (22). The fixed block (22) is rotatably connected to the fixed platform (1) through the hinge joint (21). The first fastening bolt (23) is threadedly installed on the other fixed block (22).

3. A tripod for use in mining engineering surveying according to claim 2, characterised in that, The movable foot (3) consists of a movable plate (30) and a conical foot (31). The movable plate (30) is slidably installed in the fixed block (22) on which the first fastening bolt (23) is installed, and the movable plate (30) slides between the two fixed rods (20). The conical foot (31) is fixedly installed at the end of the movable plate (30) away from the fixed platform (1).

4. The tripod for mining engineering surveying according to claim 1, characterized in that, The suspension positioning device (5) includes: The first internal threaded hole (50) is opened inside the equipment fixing screw (4); A threaded sleeve (51) is threaded into a first internal threaded hole (50), and a second internal threaded hole (53) is opened inside the threaded sleeve (51). A wire hole (52) is opened through the center of the threaded sleeve (51). The threaded cylindrical block (54) is threaded and installed in the second internal threaded hole (53).

5. A tripod for use in mining engineering surveying according to claim 4, characterised in that, The suspension positioning device (5) further includes: A vertical block (56) is fixedly connected to a vertical line (55), the diameter of which is smaller than the diameter of the thread hole (52).

6. A tripod for mining engineering surveying according to claim 1, characterized in that, The counterweight device (6) includes: A counterweight (60) is fixedly mounted with a locking block (62); The slide (63) and the slot (61) are both opened on the movable plate (30). The slide (63) and the slot (61) are connected. The slide (63) is opened inside the movable plate (30), and the slot (61) is opened from the outer surface of the movable plate (30).

7. A tripod for mining engineering surveying according to claim 1, characterized in that, The auxiliary support device (7) includes: Screw (71), screw (71) is slidably mounted inside movable plate (30); Auxiliary rod (72), one end of auxiliary rod (72) is rotatably mounted on screw (71), two auxiliary rods (72) are rotatably mounted on the same screw (71) on the same side, and the two auxiliary rods (72) are located on the two sides of the movable plate (30) respectively; Nuts (73) are threaded onto screws (71) from both ends.

8. A tripod for mining engineering surveying according to claim 7, characterized in that, The auxiliary support device (7) also includes: A slot (70) is formed through the movable plate (30), and a screw (71) is slidably installed in the slot (70).

9. A tripod for mining engineering surveying according to claim 1, characterized in that, The triangular fixing device (8) includes: Fixed plate (80), with a central slot (81) at the center of the fixed plate (80) and countersunk holes (82) arranged in a circular array on the fixed plate (80). The insert (83) is slidably installed in the countersunk socket (82), with the tip of the insert (83) facing down during installation.

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