CN219159021U

CN219159021U - Gas pressure measuring device for eliminating interference of mine pressure-bearing water

Info

Publication number: CN219159021U
Application number: CN202222556015.9U
Authority: CN
Inventors: 刘珉
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2023-06-09
Anticipated expiration: 2032-09-19

Abstract

The utility model provides a gas pressure measuring device for eliminating interference of mine confined water, which belongs to the field of underground coal mine ventilation and prevention and is suitable for measuring gas pressure in places affected by water pressure; the device comprises a pressure measuring pipe, a pressure measuring meter, a water level observing device, a drainage pipe and a water draining device; if the gas pressure in the pressure measuring hole is greater than the water pressure, the gas is directly released, and enters the upper part of the pressure measuring pipe to directly press the water surface, so that part of water in the pressure measuring hole enters the water collecting tank, the air at the upper part of the water collecting tank is compressed to form dynamic balance, and the measured gas pressure value is the barometer value plus the vertical high pressure value of the water column at the measuring point; if the pressure of the pressure measuring hole is greater than the gas pressure, water in the pressure measuring hole continuously enters the water collecting tank through the drainage pipe, the floating sleeve on the floating tank covers the flowtube part of the water discharging pipe to be exposed, water flows out, when the pressure is lower than the gas pressure, the pressure measuring Kong Wasi is released, and enters the upper part of the pressure measuring pipe, so that the dynamic balance of the pressure between the drainage pipe, the water collecting tank and the pressure measuring pipe is realized, and the gas pressure value is calculated to be the same.

Description

Gas pressure measuring device for eliminating interference of mine pressure-bearing water

Technical Field

The utility model belongs to the field of underground coal mine ventilation and prevention, and relates to a technology which is suitable for measuring the gas pressure at a place affected by water pressure and can eliminate inaccurate gas pressure measurement caused by water pressure interference.

Background

The existing gas mine, especially high gas and protruding mine, has a certain amount of gas in the coal seam, needs to measure gas parameters before exploitation, wherein the gas pressure is a very important index in the measurement of the gas parameters, the gas pressure measurement accuracy has great influence on the evaluation and identification of the mine gas grade, and further the influence on the accuracy pertinence of the implementation of the measures for preventing gas accidents, the underground coal rock layer and the cracks are mostly water-containing, and certain pressure is also present, when the underground coal rock layer and the underground coal rock layer are the elevation holes or the flat holes, the hole can be sealed, the hole can be controlled to be discharged by a certain device, the influence on the gas pressure measurement is not great, when the underground coal rock layer and the flat holes are the elevation holes, the water is difficult to discharge at the lower part, and when the pressure is higher than the gas pressure, the measured pressure is often the water head pressure, and the measured pressure is larger in deviation of the measured value of the gas pressure is caused.

Disclosure of Invention

In order to solve the problems, a drainage tube is arranged in the pressure measuring tube and is communicated with the lower opening of the pressure measuring tube, dynamic water in the pressure measuring hole is led out, and a water discharging control device is arranged at the opening to discharge the dynamic water, so that the aim of not affecting air pressure measurement is fulfilled.

The technical scheme adopted by the utility model is as follows:

the device comprises a pressure measuring pipe, a pressure measuring meter, a water level observing device, a drainage pipe and a water draining device; the pressure measuring pipe is divided into an upper section and a lower section, the upper section of the pressure measuring pipe is a hole sealing section, the pipe wall is not provided with small holes communicated with the outside of the wall, the lower section of the pressure measuring pipe is a flower pipe section, the pipe wall is provided with small holes communicated with the outside of the wall, and the effect is achieved: the upper section of the pressure measuring pipe is isolated from the outside, and the lower section of the pressure measuring pipe can collect gas passing through the pressure measuring hole; the upper part of the water level observation device is provided with a control gate valve; the drainage tube sets up in the piezometer tube, and the drainage tube upper shed leads to the header tank, and the drainage tube end is the U type structure that the drill way was upwards, fixes at piezometer tube lower shed with drainage tube end fixed point, and drainage tube pipe wall is whole normal pipe wall, does not be equipped with the aperture outside the wall and communicates with each other, and the effect that reaches is: the water in the pressure measuring holes can flow out through the drainage tube and can isolate the gas in the pressure measuring holes; the water discharging device consists of a water collecting tank, a floating tank and a water discharging pipe, wherein the water discharging pipe is arranged at the center of the water collecting tank, the floating tank is arranged in the water collecting tank, the middle section of the water discharging pipe is of a flower pipe structure, the center of the floating tank is provided with a sleeve fixed together with the floating tank, the sleeve is sleeved on the water discharging pipe, the floating tank is ensured to float up and down only, and the normal state is that the sleeve fixed together with the floating tank covers the flower pipe section of the middle section of the water discharging pipe.

Working principle: if the gas pressure in the pressure measuring hole is greater than the water pressure, the gas is directly released, the gas enters the upper part of the pressure measuring pipe through the lower section of the pressure measuring pipe, the water surface is depressed, a part of water in the pressure measuring hole enters the water collecting tank, the air at the upper part of the water collecting tank is compressed to form dynamic balance, therefore, a certain stroke is reserved from the lower opening of the sleeve pipe fixed together with the floating box in the water discharging device to the lower opening of the flower pipe at the middle part of the water discharging pipe, a certain amount of air is convenient to compress, the pressure balance is formed between the water pressure and the gas pressure as soon as possible, the water surface of the pressure measuring pipe is observed to be lower than the water surface of the water collecting tank (the water surface of the water collecting tank and the water surface of the pressure measuring pipe are at the same level before the hole sealing is measured), and the measured gas pressure value is the barometer value plus the vertical high pressure value of the measuring point water column; if the pressure of the pressure measuring hole is greater than the gas pressure, water of the pressure measuring hole continuously enters the water collecting tank through the drainage pipe, the water level of the water collecting tank reaches a certain height, the floating tank floats upwards to drive the sleeve pipe fixed with the floating tank to cover the flowtube part of the water discharging pipe to be exposed, the water can be continuously discharged until the water pressure is lower than the gas pressure, the pressure measuring Kong Wasi is discharged, enters the upper part of the pressure measuring pipe through the lower section of the pressure measuring pipe, and achieves the pressure dynamic balance between the drainage pipe, the water collecting tank and the pressure measuring pipe, and the gas pressure value is calculated by the same calculation method as long as the water level of the pressure measuring pipe is observed to be lower than the water level of the water collecting tank. The device is particularly suitable for measuring the gas pressure of the angle hole, can be free from the influence of water pressure, and has a simple structure.

Drawings

FIG. 1 is a schematic diagram of a longitudinal section structure diagram of a gas pressure measuring device for eliminating interference of mine confined water in a pressure balance state;

FIG. 2 is a schematic diagram of a longitudinal section structure of a gas pressure measuring device for eliminating interference of mine confined water in a state before hole sealing;

FIG. 3 is a schematic diagram of a longitudinal section structure of a gas pressure measuring device for eliminating interference of mine confined water in a state of water pressure larger than water pressure;

in fig. 1, 2 and 3, the correspondence between the component names and the numbers is:

1 is: a pressure gauge; 2 is: the upper section of the piezometer tube; 3 is: a pressure tap seal section; 4 is: the lower section of the piezometer tube; 5 is a fixed point at the tail end of the drainage tube; 6 is: a U-shaped structure at the tail end of the drainage tube; 7 is: a water surface; 8 is: a drainage tube; 9 is: a buoyancy tank; 10 is: a water collection tank; 11 is the upper section of the water drain pipe; 12 is: a water discharging pipe orifice; 13: the middle section of the water discharge pipe (the pipe section of the flower); 14 is: a sleeve fixed with the buoyancy tank; 15 is: a water level observation device; 16 is: the water level observation device controls the gate valve.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

When the pressure measuring hole is sealed, the water level of the water collecting tank 10 and the pressure measuring pipe is at the same level, after the hole sealing, after the water level observing device on the upper part of the water level observing device 15 is closed to control the gate valve 16, if the gas pressure of the pressure measuring point is larger than the water pressure, the gas is released and then enters the upper part of the pressure measuring pipe through the lower section 4 of the pressure measuring pipe to compress the water level until the gas is balanced with the pressure of the water collecting tank 10, the water level of the pressure measuring pipe is lower than the water level of the water collecting tank 10 through the observation of the water level observing device 15, and the measured gas pressure value is as follows: barometer value + to measuring point water column vertical pressure value; when the water pressure is great, pressure measurement hole water gets into terminal U type structure 5 of drainage tube, get into header 10 through drainage tube 8, header 10 surface of water rises, buoyancy tank 9 drives the sleeve 14 that is fixed together with the buoyancy tank and rises, reach certain distance, drain pipe middle section (flower pipe section) 13 part exposes, water can flow out through drain pipe middle section (flower pipe section) 13 constantly until being less than gas pressure, through pressure measurement pipe hypomere 4 after the gas release, get into pressure measurement pipe upper portion and compress the surface of water, until with header 10's pressure balance, observe through water level viewing device 15 equally, the pressure measurement pipe water level is less than header 10 water level can, the gas pressure value of survey is: barometer value + to the vertical pressure value of the water column at the measuring point.

Claims

1. The gas pressure measuring device for eliminating the interference of the mine confined water comprises a pressure measuring pipe, a pressure measuring meter (1), a water level observing device (15), a drainage pipe (8) and a water draining device; the pressure measuring pipe is divided into an upper section and a lower section, wherein the upper section (2) of the pressure measuring pipe is a normal section and is also a hole sealing section, the pipe wall is not provided with small holes communicated with the outside of the wall, the lower section (4) of the pressure measuring pipe is a flower pipe section, and the pipe wall is provided with small holes communicated with the outside of the wall; a control gate valve (16) is arranged at the upper part of the water level observation device (15); the drainage tube (8) is arranged in the pressure measuring tube, the upper opening of the drainage tube (8) is communicated with the water tank, the tail end of the drainage tube (8) is of a U-shaped structure with an upward orifice and is fixed at the lower opening of the pressure measuring tube through a fixing point (5) at the tail end of the drainage tube, and the wall of the drainage tube (8) is a normal wall and is not communicated with a small hole outside the wall; the water discharging device consists of a water collecting tank (10), a floating tank (9) and a water discharging pipe, wherein the water collecting tank is provided with the water discharging pipe at the center, the floating tank (9) is arranged in the water collecting tank (10), the middle section (13) of the water discharging pipe is of a flower pipe structure, the center of the floating tank is provided with a sleeve (14) fixed with the floating tank, the sleeve is sleeved on the water discharging pipe, the floating tank (9) is ensured to float up and down only, and the middle section (13) of the water discharging pipe is covered by the sleeve (14) fixed with the floating tank in a normal state.