CN203687823U - Mining telescopic measuring rod - Google Patents

Abstract

The utility model discloses a mining telescopic measuring rod, which is mainly composed of a fixed sleeve rod, a scaled telescopic rod, a magnet, a handle and a rod cap; the telescopic rods are connected and fixed by positioning balls and positioning holes, which can be conveniently Telescopic; the scale line is marked on the telescopic rod, and the range of the telescopic measuring rod can be designed according to actual needs; a magnet is respectively set at the top and bottom of the telescopic measuring rod, which can make the measuring rod conveniently positioned to the established measuring benchmark Point. The utility model can be conveniently expanded and contracted, and can also be shrunk and inserted into the fixed sleeve rod. The utility model has the advantages of reasonable structure, convenient use, high measurement accuracy and certain practical value in mines.

Description

A mining telescopic measuring rod

technical field

The utility model relates to a telescopic measuring rod for mines, which can especially conveniently measure the surface displacement of coal mine roadways.

Background technique

The surface displacement of coal mine roadway is the most basic mine pressure observation content, including the amount of roof and floor approach, the amount of approach of two sides, etc. According to the monitoring results, the surface displacement velocity of the roadway and the convergence rate of the roadway section can be calculated, the relationship curve between the displacement, displacement speed and the position and time of the mining face can be drawn, the deformation law of the surrounding rock of the roadway can be analyzed, and the stability of the surrounding rock and the effect of roadway support can be evaluated. .

The surface displacement of the roadway is often installed with the cross-point method to install the monitoring section. The holes are drilled in the middle of the roadway roof and floor and in the horizontal direction of the two sides. The four holes are distributed in a cross shape on the same plane. Iron nails are used as measurement reference points, mainly used to observe the change and development of the roof and floor approach and the two sides approach over time after excavation of the roadway.

At present, most steel tapes are used underground to measure the surface displacement of the roadway. In actual measurement, the following problems often occur:

1. The positioning of the steel ruler is difficult, especially when measuring in the vertical direction, it is difficult to quickly locate the top of the steel ruler to the established measurement reference point, which often requires two or more people to work together, which is time-consuming and laborious. 2. When measuring the displacement in the horizontal direction, the steel tape is prone to bending, which affects the measurement accuracy.

This shows that the prior art needs further improvement and development.

Utility model content

The utility model provides a mine-used telescopic measuring rod for solving the defects in the above-mentioned prior art. The measuring rod can quickly locate the measuring reference point during the measurement process, saves time and effort, and the telescopic measuring rod will not bend, and the measurement The accuracy is much higher than that of a tape measure.

In order to solve the above-mentioned technical problems, the utility model scheme includes:

The utility model relates to a mine-used telescopic measuring rod. The lower end of the measuring rod is designed as a fixed sleeve rod, and the upper end of the sleeve rod is a regular hexagonal structure, and a positioning hole is provided.

Preferably, the telescopic rod is connected to the fixed sleeve rod, and the telescopic rods are all designed as a positive hexagonal structure. A rod cap is arranged at the upper end of the innermost telescopic rod, and a positioning ball is arranged at the lower end. Positioning holes and positioning balls are respectively arranged at both ends, and the positioning balls and the positioning holes are arranged on the same straight line.

Further, scale lines are provided on the telescopic rods, and the scales are marked from the top of the cap of the innermost telescopic rod, and are marked outwardly layer by layer, and the accuracy of the connection of the scale lines between the telescopic rods is ensured.

Furthermore, magnets for positioning are provided at the lower end of the fixed sleeve rod of the measuring rod and the upper end of the telescopic rod provided with the rod cap.

The beneficial technical effect of the utility model is:

The utility model provides a mining telescopic measuring rod. When using the measuring rod, the surveyor pulls out the telescopic rod section by section from the fixed sleeve rod, and makes the lower end of the pulled out telescopic rod locate the ball and the lower end to be pulled out. The positioning hole at the upper end of a telescopic rod is connected and fixed until it is pulled to the required length. At this time, the operator moves the top of the measuring rod closer to the iron nail of the measuring reference point. Under the action of the magnetic force, the top of the measuring rod can be quickly positioned to the reference point. Point, then fine-tune the telescopic rod, observe the scale line aligned with the upper end of the fixed sleeve rod to read, the reading plus the length of the fixed sleeve rod is the required data. After the measurement, hold the fixed sleeve rod with one hand, and hold the telescopic rod with the other hand, so that the telescopic rods shrink and fit into the fixed sleeve rod one by one. The above-mentioned operation process is simple, and one person can conveniently locate and measure the measurement reference point, which saves time and effort, and the telescopic measuring rod will not bend during the measurement process, so the measurement accuracy is high.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the mining telescopic measuring rod in the extended state.

Fig. 2 is a schematic diagram of the structure of the mine-used telescopic measuring rod in a contracted state.

Fig. 3 is a partially enlarged view of the telescopic rod with scale lines in the utility model.

In the figure: 1-fixed sleeve rod, 2-telescopic rod, 3-rod cap, 4-magnet, 5-positioning hole, 6-positioning ball, 7-handle.

Detailed ways

The utility model provides a mining telescopic measuring rod. In order to make the purpose, technical solution and advantages of the utility model clearer and clearer, the utility model will be further described in detail in conjunction with the accompanying drawings and embodiments below.

A mining telescopic measuring rod, comprising a fixed sleeve rod 1, a telescopic rod 2, a rod cap 3, a magnet 4, a positioning hole 5, a positioning ball 6, and a handle 7. The upper end of the fixed sleeve rod 1 is a regular hexagonal structure and is provided with a The positioning hole 5 and the telescopic rod 2 are all positive hexagonal structures, and the upper and lower ends of each telescopic rod 2 are respectively provided with a positioning hole 5 and a positioning hole bead 6, and the positioning hole 5 and the positioning hole bead 6 are on the same straight line, and the telescopic rod 2 There is a scale line marked on it, the starting point of the scale starts from the top of the measuring rod, and each telescopic rod 2 is accurately connected from the inside to the outside, and the scale remains continuous. The lower end of the fixed sleeve rod 1 and the upper end of the telescopic rod with the rod cap 3 are provided with Magnet 4, when operating the measuring rod, pull out the telescopic rod 2 section by section from the fixed sleeve rod 1, and let the lower end positioning ball 6 of the pulled out telescopic rod 2 be positioned with the upper end of the next section of the telescopic rod 2 to be pulled out The hole 5 is connected and fixed until it is pulled to the required length. At this time, use the magnets 4 at both ends of the measuring rod to accurately locate it on the iron nail of the measuring reference point, and then fine-tune the telescopic rod 2 to observe the scale line aligned with the upper end of the fixed sleeve rod 1 Carry out reading, reading plus the length of fixed cover rod 1 is exactly required data. After the measurement, hold the fixed sleeve rod 1 with one hand, and hold the telescopic rod 2 or the rod cap 3 with the other, so that the telescopic rods 1 are shrunk and inserted into the fixed sleeve rod 1 one by one.

The shape of the upper end of the fixed sleeve rod and the telescopic rod can also be designed as a circular structure or other suitable structures, and both the fixed sleeve rod and the telescopic rod are made of stainless steel. In order to meet the actual needs, the ranges of the telescopic measuring rods are designed in series. Taking the range of 4.5 meters as an example, the length of the fixed rod can be designed to be 1 meter, and four telescopic rods can be designed, and the lengths can be designed in descending order to be 0.95 meters, 0.9 meters, 0.85 meters, and 0.8 meters. , can also be designed in other descending order.

Parts not mentioned in the above methods can be realized by adopting or referring to existing technologies.

It should be understood that the above-mentioned descriptions for the preferred embodiments are relatively detailed, and cannot therefore be considered as limiting the protection scope of the utility model patent. In the case of the scope of protection of the new claims, various modifications such as replacement and simple combination can also be made, all of which fall within the protection scope of the utility model, and the scope of protection of the utility model should be based on the appended claims allow.

Claims (1)

1. a mining flexible sounding rod, comprises fixing loop bar and the graduated expansion link of mark, it is characterized in that: fixing loop bar upper end is positive hexagonal structure, and is provided with a pilot hole, and fixing loop bar lower end is provided with the magnet for locating; Expansion link is positive hexagonal structure, and upper/lower terminal is respectively arranged with a pilot hole and location ball, is provided with scale mark on expansion link, and inner most expansion link top is provided with a pole cap, is provided with the magnet for locating in pole cap.

Images