Connecting rod for coal mine underground gas emission initial velocity tester

Abstract

The utility model belongs to the technical field of underground mining detection equipment, and particularly relates to an extension rod for an underground coal mine gas emission initial velocity tester. A sample gas path communicated with a gas source and a gas ingress pipe is arranged on a connecting rod; the connecting rod is further provided with an air bag used for abutting against an air outlet of an air source, the connecting rod is sleeved with the air bag, an air cavity is formed between the air bag and the connecting rod, and the air bag is communicated with an air leading-in pipe. Therefore, the problems that an existing measuring device is inaccurate in data recording, difficult to accurately control the inflation volume, tedious in operation and inaccurate in detection result are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of underground mining detection equipment, in particular to a connecting rod used for an instrument for measuring the initial velocity of gas emission in underground coal mines. Background Art

[0002] Existing gas outflow initial velocity measuring devices primarily rely on traditional mechanical meter designs, which have numerous limitations in practical applications, specifically the following: First, data recording of the gas outflow initial velocity must be completed manually, a time-consuming and tedious process that is also susceptible to human factors, leading to inaccurate or missed data. Second, using a stopwatch for timing is cumbersome and inconvenient for quickly and accurately obtaining the required time parameters. Third, using an air pump for manual inflation is laborious and difficult to precisely control the inflation volume. Furthermore, the design of the gas pipe connection joint is not stable enough and can easily fall off during use, affecting the continuity and accuracy of the measurement. Furthermore, improper pressure control during inflation can easily lead to overinflation and bursting, increasing operational costs and posing safety risks. Traditional instruments are particularly inadequate for scenarios requiring multi-point measurements, being time-consuming, labor-intensive, and inefficient. Furthermore, mechanical flowmeters exhibit large errors when measuring gas flow, making it difficult to meet the requirements for high-precision measurements. Finally, the entire operation process is complex and cumbersome, lacking convenience, and causing considerable inconvenience for users.

[0003] In addition, the existing gas outburst initial velocity measuring device's connecting rod uses a pagoda joint to connect the air pipe and the gas pipe, which is cumbersome to operate and prone to air leakage. Although it can be tied with a cable tie, it cannot fundamentally solve the technical problem and still affects the accuracy of the gas outburst initial velocity measurement results to a certain extent.

[0004] In view of the above defects, it is necessary to optimize and improve the structure of the current gas outburst initial velocity measuring device, so as to solve the problems of inaccurate data recording, difficulty in accurately controlling the inflation volume, cumbersome operation and inaccurate detection results existing in the measuring device of the prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a connecting rod for a coal mine underground gas outburst initial velocity measuring instrument, so as to solve the problems of inaccurate data recording, difficulty in accurately controlling the inflation volume, cumbersome operation and inaccurate detection results existing in the measuring instrument in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a connecting rod for a coal mine underground gas outburst initial velocity measuring instrument, which is used to introduce the gas to be measured in the gas source into the measuring instrument, and the connecting rod is provided with a sample gas path connected to the gas source and the gas inlet pipe; the connecting rod is also provided with an air bag for pressing the gas outlet of the gas source, the air bag is sleeved on the connecting rod and an air cavity is formed between the air bag and the connecting rod, and the air bag is connected to the air inlet pipe.

[0007] In a possible design, the connecting rod includes an insertion rod, an airbag rod and an extension rod, the insertion rod is provided with an air inlet hole, the airbag is sleeved on the airbag rod, and the extension rod is connected to the gas inlet pipe.

[0008] In a possible design, the end of the insertion rod is formed into a cone shape.

[0009] In a possible design, the insertion rod is provided with a plurality of rows of air inlet holes spaced apart along the axial direction thereof, and the air inlet holes in adjacent rows are staggered.

[0010] In one possible design, the insertion rod is connected to the airbag rod through a connecting structure; the connecting structure includes a connecting tube and a clamp, the two ends of the connecting tube are sealed and connected to the insertion rod and the airbag rod respectively, the airbag is sleeved on the outer periphery of the connecting tube, and the clamp is sleeved on the outer periphery of the airbag to seal and tighten the airbag on the connecting tube.

[0011] In a possible design, the airbag rod is sealed and connected to the extension rod through a positioning tube; wherein, a vent hole is provided on the positioning tube, one end of the vent hole is connected to the air inlet tube, and the other end is connected to the air cavity.

[0012] In a possible design, the axial direction of the vent hole is parallel to the axis of the positioning cylinder.

[0013] In a possible design, at least two extension rods are provided, and adjacent extension rods are sealed and connected via an assembly tube.

[0014] With the above technical solution, an extension rod can be inserted into the gas source outlet. Gas is then added to the airbag via the air intake tube, air pump, and air inlet tube, causing the airbag to inflate. A controller controls the air pump to automatically inflate the airbag to the set pressure. The air source outlet is then sealed to prevent gas leakage, allowing gas to enter through the sample gas path. The controller uses a gas pressure sensor and flow sensor to collect gas pressure and gas outflow flow data, accurately measuring the initial velocity of the gas outflow. The controller also stores thousands of collected data in a memory. The display is configured to have a display function. This not only improves the accuracy of the test results, but also allows data to be recorded. Furthermore, during operation, the inflation volume can be precisely controlled, thereby preventing gas leakage to a certain extent and further ensuring measurement accuracy. Furthermore, the entire process can be completed automatically by the measuring instrument, reducing manual intervention and making the entire measurement process simple and efficient, with excellent accuracy, reliability, and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a structural schematic diagram of a connecting rod of a gas emission initial velocity measuring instrument for underground coal mines provided by the present invention, viewed from one perspective;

[0017] Figure 2 This is a structural schematic diagram of a connecting rod of a gas emission initial velocity measuring instrument for underground coal mines provided by the present invention, viewed from another perspective;

[0018] Figure 3 This is a schematic structural diagram of a connecting rod for an underground coal mine gas emission initial velocity measuring instrument provided by the present invention in one embodiment, wherein part of the body structure is removed to illustrate the internal structure;

[0019] Figure 4 This is a schematic structural diagram of a connecting rod for an underground coal mine gas emission initial velocity measuring instrument provided by the present invention in one embodiment, wherein part of the body structure is removed in order to show the internal structure; and Figure 4 and Figure 3 The perspective is different;

[0020] Figure 5This is a schematic diagram of the three-dimensional structure of a connecting rod in an embodiment of a connecting rod of a gas emission initial velocity measuring instrument for underground coal mines provided by the present invention;

[0021] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of part A;

[0022] Figure 7 yes Figure 5 Schematic diagram of the enlarged structure of part B;

[0023] Figure 8 This is a schematic cross-sectional view of a connecting rod in an embodiment of a connecting rod of a gas emission initial velocity measuring instrument for underground coal mines provided by the present invention;

[0024] Figure 9 yes Figure 8 Schematic diagram of the enlarged structure of part C;

[0025] Figure 10 yes Figure 8 Schematic diagram of the enlarged structure of part D.

[0026] In the above drawings: 1-connecting rod, 11-insertion rod, 111-air inlet, 12-airbag rod, 13-extension rod, 14-airbag, 151-connecting tube, 152-holding hoop, 16-positioning tube, 161-vent, 17-assembly tube, 21-body, 22-display, 23-button, 24-handle, 31-air suction pipe, 32-air pump, 33-air inlet pipe, 34-pressure sensor, 41-gas inlet pipe, 42-flow sensor, 43-gas exhaust pipe. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that while the description of these embodiments is intended to aid understanding of the present invention, they do not constitute limitations on the present invention. The specific structural and functional details disclosed herein are merely intended to illustrate exemplary embodiments of the present invention. However, the present invention may be embodied in many alternative forms, and should not be construed as being limited to the embodiments described herein.

[0028] According to the first aspect of the present invention, a connecting rod for a gas emission initial velocity measuring instrument in underground coal mines is provided. Figures 1 to 10 One specific embodiment is shown.

[0029] See Figures 1 to 10As shown, the connecting rod for the coal mine underground gas outburst initial velocity measuring instrument is used to introduce the gas to be measured in the gas source into the measuring instrument. The connecting rod 1 is provided with a sample gas path connected to the gas source and the gas introduction pipe 41; the connecting rod 1 is also provided with an air bag 14 for pressing the gas outlet of the gas source, the air bag 14 is sleeved on the connecting rod 1 and an air cavity is formed between the air bag 14 and the connecting rod 1, and the air bag 14 is connected to the air introduction pipe 33.

[0030] Through the above technical solution, the connecting rod 1 can be inserted into the air outlet of the gas source, and then gas is filled into the airbag 14 through the air inlet tube 33 to cause the airbag 14 to swell. The controller controls the air pump 32 to automatically inflate the airbag 14 to reach the set air pressure. The air outlet of the gas source is then sealed to prevent gas leakage, allowing gas to enter through the sample gas path. The controller collects gas pressure and gas outflow flow data through the gas pressure sensor 34 and flow sensor 42 to accurately measure the initial velocity of the gas outflow, and the controller stores thousands of collected data in the memory. Based on the setting of the display 22, it has a display function. This not only improves the accuracy of the test results, but also allows data to be recorded. At the same time, during operation, the inflation volume can be precisely controlled, thereby preventing gas leakage to a certain extent and further ensuring measurement accuracy. Moreover, the entire process can be completed automatically by the measuring instrument, reducing manual participation and intervention links, making the entire measurement work simple and efficient, with good accuracy, reliability and practicality.

[0031] In one embodiment provided herein, the connecting rod 1 includes an insertion rod 11, an airbag rod 12, and an extension rod 13. The insertion rod 11 is provided with an air inlet 111. The airbag rod 12 is sheathed with an airbag 14. The extension rod 13 is connected to a gas inlet tube 41. The airbag rod 12 supports and secures the airbag 14, ensuring that it maintains its correct position and shape during inflation. The airbag 14 is sheathed on the airbag rod 12, and when gas flows through the airbag rod 12, the airbag 14 expands.

[0032] The main function of the insertion rod 11 is to serve as a connecting part with the gas source outlet, ensuring that the gas can flow smoothly from the gas source into the measurement system. The insertion rod 11 is provided with an air inlet hole 111, which allows the gas to enter the subsequent gas path system from the gas source through the insertion rod 11. One end of the extension rod 13 is connected to the insertion rod 11 or the airbag rod 12, and the other end is connected to the gas introduction tube 41, so that the gas can smoothly enter the gas introduction tube 41 from the insertion rod 11 through the airbag rod 12. In this way, the smooth flow of gas from the gas source to the airbag 14 and then to the gas introduction tube 41 is ensured, providing a stable and reliable gas path system for the measurement of the initial velocity of gas outburst in coal mines. At the same time, the precise matching and connection between the various parts also ensure the accuracy and reliability of the measurement results.

[0033] Furthermore, the end of the insertion rod 11 is formed into a cone shape. The end of the insertion rod 11 is formed into a cone shape, which is convenient for inserting into the gas source outlet. As a part of the extension rod 13, the insertion rod 11 is provided with an air inlet 111 to ensure smooth inflow of gas.

[0034] Furthermore, the insert rod 11 is provided with multiple rows of air inlet holes 111 spaced apart along its axial direction, which can increase the number of channels for gas to flow in. The design of multiple rows of air inlet holes 111 increases the channels for gas to flow in, allowing gas to flow into the insert rod 11 faster, improving the efficiency of gas inflow, and improving the smoothness of gas flow. The air inlet holes 111 in adjacent rows are staggered so that the air inlet holes 111 in each row are not directly aligned with the air inlet holes 111 in another row. This staggered design helps the gas to be more evenly distributed on the surface of the insert rod 11 during the inflow process, reducing the resistance and eddy current phenomenon of gas flow. By optimizing the design of the insert rod 11, the measurement effect of the gas outburst initial velocity measuring instrument used in coal mines can be further improved, providing more reliable technical support for coal mine safety production.

[0035] In the present disclosure, the insertion rod 11 is connected to the airbag rod 12 through a connecting structure; the connecting structure includes a connecting tube 151 and a clamp 152, and the two ends of the connecting tube 151 are respectively sealed and connected to the insertion rod 11 and the airbag rod 12, and the airbag 14 is sleeved on the outer periphery of the connecting tube 151 and sleeved on the outer periphery of the airbag 14 to seal and tighten the airbag 14 on the connecting tube 151.

[0036] The connecting tube 151 provides a secure and sealed connection between the insertion rod 11 and the airbag rod 12, ensuring smooth, leak-free flow of gas from the insertion rod 11 to the airbag rod 12. The clamp 152, a fastening structure surrounding the outer periphery of the airbag 14, tightly clamps the airbag 14 to the connecting tube 151, providing additional support and securing the airbag 14. This prevents the airbag 14 from falling off or shifting due to pressure during inflation. The clamp 152 secures the airbag 14 tightly to the connecting tube 151, creating a secure and sealed gas passage.

[0037] The design of connecting tube 151 and clamp 152 ensures a sealed connection between insertion rod 11 and airbag rod 12, preventing gas leakage and improving the sealing of the entire gas system. By optimizing the connection structure between insertion rod 11 and airbag rod 12, the measurement performance of the gas emission initial velocity measuring instrument used in underground coal mines can be further improved, providing more reliable technical support for coal mine safety production.

[0038] Specifically, the connecting tube is threadedly connected to the insertion rod and the airbag rod, respectively. The rotation of the threads secures the parts, providing a reliable connection and easy disassembly. Furthermore, the threaded connection is provided with raw tape. Raw tape is a sealing material that enhances the seal of the connection, preventing gas leakage and thus improving the safety and reliability of the connection.

[0039] In one embodiment provided herein, the airbag rod 12 is sealedly connected to the extension rod 13 via a positioning tube 16. The positioning tube 16 is provided with a vent 161, one end of which is connected to the air inlet tube 33, and the other end is connected to the air cavity. The vent 161 is specially designed on the positioning tube 16 to allow for smooth gas flow. One end of the vent 161 is connected to the air inlet tube 33, responsible for introducing external air. The other end of the vent 161 is connected to the air cavity, ensuring that gas can enter and fill the cavity.

[0040] Specifically, the positioning cylinder 16 is connected to the extension rod and the airbag rod, respectively, through a threaded connection. The rotation of the threads secures the parts, providing a reliable connection and easy disassembly. Furthermore, raw tape is applied to the threaded connection. Raw tape is a sealing material that enhances the seal of the connection, preventing gas leakage and thus improving the safety and reliability of the connection.

[0041] Furthermore, the axial direction of the vent hole 161 is parallel to the axis of the positioning tube 16. The axis of the vent hole 161 is parallel to the axis of the positioning tube 16, so that the gas can pass smoothly in a straight direction during the flow process, reducing the resistance and eddy current phenomenon of the gas flow, and improving the flow efficiency of the gas. The parallel design makes the layout of the vent hole 161 on the positioning tube 16 more uniform and symmetrical, which helps to enhance the structural stability of the positioning tube 16 and reduce the vibration and noise caused by the gas flow. The design of the vent hole 161 being parallel to the axis of the positioning tube 16 makes it easier to achieve a tight fit at the sealed connection, reduces the possibility of gas leakage, and ensures the sealing of the entire gas path system. In addition, the design of the parallel vent holes 161 is also convenient for processing and manufacturing, which can reduce the complexity and cost of the production process and improve the production efficiency and quality of the product.

[0042] In the present disclosure, at least two extension rods 13 are provided to meet the connection requirements of different lengths or complex environments. Adjacent extension rods 13 are sealed and connected by an assembly tube 17 to ensure the stability and airtightness of the connection and prevent gas or liquid leakage.

[0043] Since the extension rods 13 can be sealed and connected by the assembly tube 17, multiple extension rods 13 can be freely assembled to adapt to different detection environments or work requirements. This design improves the flexibility and practicality of the device.

[0044] Specifically, the assembly cylinder 17 is connected to the extension rod by a threaded connection, thereby achieving sealed fixation of the parts, which has the advantages of reliable connection and easy disassembly.

[0045] Under the technical concept of the present disclosure, the sealed connection between different rod segments can also be achieved through other sealing methods besides threaded connection, which is only described as an example in the present disclosure.

[0046] In one embodiment of the present disclosure, a plurality of buttons 23 are provided on the housing 21. The buttons 23 are communicatively connected to the controller. Each button 23 may correspond to a different function or operating mode, providing the user with a variety of control options. These buttons 23 are connected to the controller via a communication link, ensuring that user commands are accurately and quickly transmitted to the controller, thereby implementing the corresponding operation or function.

[0047] A handle 24 is provided on the body 21, so that the user can easily lift and move the entire device, thereby improving the portability and convenience of use of the device.

[0048] In one embodiment provided herein, the air intake pipe 31 and the gas introduction pipe 41 are both located on the upper wall of the housing 21; the air introduction pipe 33 is located on the side wall of the housing 21, and the gas discharge pipe 43 is located on the bottom wall of the housing 21. The air intake pipe 31 and the gas introduction pipe 41 are strategically located on the upper wall of the housing 21, helping to ensure smooth air and gas flow into the interior of the housing 21 while avoiding interference and obstruction between the pipes. Unlike the air intake pipe 31 and the gas introduction pipe 41, the air introduction pipe 33 is located separately on the side wall of the housing 21. This layout helps optimize the gas flow path, improves gas introduction efficiency, and ensures even gas distribution to all parts of the housing 21. The gas discharge pipe 43 is located on the bottom wall of the housing 21. This design helps ensure smooth gas flow out of the housing 21 during discharge, preventing gas from stagnating or accumulating inside the housing 21, thereby improving gas discharge efficiency and the overall performance of the housing 21.

[0049] Specifically, the controller is configured as a single-chip microcomputer. Alternatively, the controller may be configured as a PLC logic controller or a central processing unit (CPU). In other embodiments, the controller may be configured as a digital signal processor (DSP), an application-specific integrated circuit (ASIC), or a field-programmable gate array (FPGA).

[0050] The pressure sensors, flow sensors, air pumps and other electrical appliances or components used are all existing technology products. Those skilled in the art can flexibly configure them according to actual needs.

[0051] Finally, it should be noted that the present invention is not limited to the aforementioned optional embodiments. Anyone can develop various other product forms based on the inspiration of this invention. The aforementioned specific embodiments should not be construed as limiting the scope of protection of the present invention. The scope of protection of the present invention shall be determined by the claims, and the specification may be used to interpret the claims.

Claims

1. A connecting rod for a coal mine gas outburst initial velocity measuring instrument, used to introduce the gas to be measured in the gas source into the measuring instrument, characterized in that: The connecting rod is provided with a sample gas path connected to the gas source and the gas introduction pipe of the measuring instrument; the connecting rod is also provided with an air bag for pressing the gas outlet of the gas source, the air bag is sleeved on the connecting rod and an air cavity is formed between the air bag and the connecting rod, and the air bag is connected to the air introduction pipe; The connecting rod comprises an insertion rod, an airbag rod and an extension rod. The insertion rod is provided with an air inlet hole. The airbag rod is sleeved with the airbag. The extension rod is connected to the measuring instrument.

2. The connecting rod for the coal mine gas emission initial velocity measuring instrument according to claim 1, characterized in that: The end portion of the insertion rod is formed in a conical shape.

3. The connecting rod for the coal mine gas emission initial velocity measuring instrument according to claim 1, characterized in that: The insertion rod is provided with a plurality of rows of air inlet holes spaced apart along the axis direction thereof, and the air inlet holes in adjacent rows are staggered.

4. The connecting rod for the coal mine gas emission initial velocity measuring instrument according to claim 1, characterized in that: The insertion rod is connected to the airbag rod through a connecting structure; the connecting structure includes a connecting tube and a clamp, the two ends of the connecting tube are respectively sealed and connected to the insertion rod and the airbag rod, the airbag is sleeved on the outer periphery of the connecting tube, and the clamp is sleeved on the outer periphery of the airbag to seal and tighten the airbag on the connecting tube.

5. The connecting rod for the coal mine gas emission initial velocity measuring instrument according to claim 1, characterized in that: The airbag rod is sealed and connected to the extension rod through a positioning tube; wherein, a vent hole is provided on the positioning tube, one end of the vent hole is connected to the air introduction tube, and the other end is connected to the air cavity.

6. The connecting rod for the coal mine gas emission initial velocity measuring instrument according to claim 5, characterized in that: The axial direction of the vent hole is parallel to the axis of the positioning cylinder.

7. The connecting rod for the coal mine gas emission initial velocity measuring instrument according to claim 1, characterized in that: The extension rods are provided in at least two pieces, and adjacent extension rods are sealed and connected via an assembly tube.

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