Rapid determinator for gas content of underground coal seam

Abstract

The utility model provides an underground coal seam gas content rapid determinator, relates to the technical field, and solves the technical problem that liquid overflows, is wasted and cannot be recycled in the prior art. The device comprises two containers, an air inlet valve, an air outlet valve, weighing sensors and a water inlet and outlet valve, the air inlet valve, the air outlet valve and the water inlet and outlet valve are all connected with the containers, communicating holes are formed close to the bottoms of the containers, the containers are communicated through the communicating holes, and the bottoms of the containers are all provided with the weighing sensors. Wherein one container is communicated with the outside through an air inlet valve and is sealed with the outside through an exhaust valve, and the other container is sealed with the outside through an air inlet valve and is communicated with the outside through an exhaust valve. According to the utility model, a double-container gas-liquid replacement mode is adopted, so that less liquid repeatedly flows between the two containers to realize gas-liquid replacement, the gas content is accurately measured, and meanwhile, the replacement liquid is prevented from overflowing and being wasted to be recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of gas content measuring equipment, in particular to an instrument for quickly measuring gas content in underground coal seams. Background Art

[0002] Currently available equipment for measuring coalbed gas content generally consists of a single-container gas-liquid exchange container, a weighing sensor, a PCB board, a battery box, piping, and a casing. Existing instruments all utilize a gas-liquid exchange method, specifically as follows: By sampling the coal seam and desorbing the gas, the desorbed gas is introduced into a single gas-liquid exchange container via a gas pipe. Taking advantage of the fact that gas is insoluble in water, when gas is injected into a sealed container, some water overflows from the container. The overflowed water is then weighed to determine the volume of gas extracted from the coal sample. Finally, computer technology is used to determine the coalbed gas content. However, in practice, this type of single-container gas-liquid exchange container requires a larger container to ensure that measurements can be completed. This process results in wasteful liquid overflow, and when measurements are repeated, the liquid must be replenished, preventing recycling and resulting in a cumbersome operation. Utility Model Content

[0003] The purpose of this utility model is to provide a rapid gas content measuring instrument for underground coal seams, which solves the technical problem of liquid overflow and waste that cannot be recycled in the prior art. The various technical effects produced by the preferred technical solution among the various technical solutions provided by this utility model are described in detail below.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] The utility model provides an underground coal seam gas content rapid measuring instrument, including a container, an air intake valve, an exhaust valve, a weighing sensor and an inlet and outlet valve. There are two containers, and the air intake valve, the exhaust valve and the inlet and outlet valve are all connected to the containers. A connecting hole is provided near the bottom of the container, and the containers are connected through the connecting hole. The bottom of each container is provided with the weighing sensor. One of the containers is connected to the outside world through the air intake valve and is closed to the outside world through the exhaust valve, and the other container is closed to the outside world through the air intake valve and is connected to the outside world through the exhaust valve.

[0006] Preferably, the container includes a first container and a second container, the first container is provided with a first air inlet and a first exhaust port, the second container is provided with a second air inlet and a second exhaust port, the first air inlet and the second air inlet are both connected to the air inlet valve, and the first exhaust port and the second exhaust port are both connected to the exhaust valve.

[0007] Preferably, the air inlet valve and the exhaust valve are both two-position three-way solenoid valves, the two air outlet ends of the air inlet valve are respectively connected to the first air inlet port and the second air inlet port, the air inlet end of the air inlet valve is used to connect with an external device, the two air inlet ends of the exhaust valve are respectively connected to the first exhaust port and the second exhaust port, and the air outlet end of the exhaust valve is connected to the outside world.

[0008] Preferably, the first air inlet is arranged near the bottom of the first container, and the second air inlet is arranged near the bottom of the second container; the first exhaust port is arranged near the top of the first container, and the second exhaust port is arranged near the top of the second container.

[0009] Preferably, the first exhaust port and the second exhaust port are arranged on opposite end surfaces to the corresponding communicating hole on the container.

[0010] Preferably, the inlet and outlet valve includes a water inlet and two water outlets, the water inlet is used to communicate with the outside world, and the two water outlets are respectively connected to the connecting holes, and the inlet and outlet valve includes a water inlet state and a connecting state; in the water inlet state, the water inlet is connected to the two containers through the two water outlets; in the connecting state, the water inlet is closed, and the two containers are connected to each other through the two water outlets.

[0011] This application adopts the above technical solution, which has at least the following beneficial effects:

[0012] The underground coal seam gas content rapid measuring instrument includes a container, an air intake valve, an exhaust valve, a weighing sensor, and an inlet and outlet valve. There are two containers, and the air intake valve, exhaust valve, and inlet and outlet valves are all connected to the container. A connecting hole is provided near the bottom of the container, and the containers are connected through the connecting hole. The bottom of each container is provided with a weighing sensor. One of the containers is connected to the outside world through the air intake valve and is closed to the outside world through the exhaust valve. The other container is closed to the outside world through the air intake valve and is connected to the outside world through the exhaust valve. By using two mutually connected containers, the liquid can be reciprocated between the two containers. In this way, the measurement can be completed with a small amount of reciprocating liquid. In addition, the liquid will not overflow and be wasted during the measurement process, and can be recycled without the complicated operation of adding liquid.

[0013] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the main structure of an underground coal seam gas content rapid measuring instrument provided by an embodiment of the utility model;

[0016] Figure 2 This is a rear-view three-dimensional structural diagram of an underground coal seam gas content rapid measuring instrument provided by an embodiment of the utility model;

[0017] Figure 3 The utility model is provided in an embodiment of the present invention. The utility model is provided in an embodiment of the present invention. The utility model is provided in an embodiment of the present invention.

[0018] In the figure, 1 is the air inlet valve; 2 is the exhaust valve; 3 is the weighing sensor; 4 is the air inlet and outlet valve; 5 is the connecting hole; 6 is the first container; 7 is the second container; 8 is the first air inlet; 9 is the first exhaust port; 10 is the second air inlet; 11 is the second exhaust port. DETAILED DESCRIPTION

[0019] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0020] The specific embodiment of the utility model provides a rapid measuring instrument for underground coal seam gas content, combined with the attached Figure 1 - Attachment Figure 3 As shown, it mainly includes a container, an air inlet valve 1, an exhaust valve 2, a weighing sensor 3 and an inlet and outlet valve 4.

[0021] The number of containers is two;

[0022] The air inlet valve 1, the exhaust valve 2 and the inlet and outlet valve 4 are all connected to the container. The air inlet valve 1 is used to control the air intake of the container, the exhaust valve 2 is used to control the exhaust of the container, and the inlet and outlet valve 4 is used to control the water intake and drainage of the container;

[0023] A communication hole 5 is provided near the bottom of the container. The two containers are connected through the communication hole 5. Liquid can flow between the two containers through the communication hole 5. When one container is inflated, the liquid enters the other container through the communication hole 5.

[0024] A weighing sensor 3 is provided at the bottom of each container, which can measure the weight of the liquid in the container in real time and then calculate the volume of the gas entering the container.

[0025] In actual measurements, one of the containers must be connected to the outside world via the inlet valve 1 and sealed off from the outside world via the exhaust valve 2, while the other container must be sealed off from the outside world via the inlet valve 1 and connected to the outside world via the exhaust valve 2. This means that when gas is introduced into one container, the outlet of this container must be sealed, preventing gas from being discharged. Liquid enters the other container through the connecting hole 5, allowing gas to replace liquid in this container. In the other container, the inlet end must be sealed, while the outlet end must be open. Liquid then smoothly enters this container, while gas is discharged from this container. After a period of time, the first gas-liquid exchange is completed between the two containers. During this process, the amount of gas exchanged in this single exchange is calculated using the data fed back by the weighing sensor 3. A second gas-liquid exchange is performed by switching the inlet valve 1 and exhaust valve 2 on the two containers until the measurement is complete.

[0026] By using the above-mentioned underground coal seam gas content rapid measuring instrument, the liquid can be replaced back and forth between the two containers by switching the air inlet and outlet on the two containers, thereby determining the gas content this time. The liquid is only replaced between the two containers and will not be wasted, and multiple liquid replenishments can be completed.

[0027] In a specific embodiment of the present application, the container includes a first container 6 and a second container 7, the first container 6 is provided with a first air inlet 8 and a first exhaust port 9, and the second container 7 is provided with a second air inlet 10 and a second exhaust port 11, the first air inlet 8 and the second air inlet 10 are both connected to the air inlet valve 1, and the air inlet valve 1 can control the opening and closing of the first air inlet 8 and the second air inlet 10, and the first exhaust port 9 and the second exhaust port 11 are both connected to the exhaust valve 2, and the exhaust valve 2 can control the opening and closing of the first exhaust port 9 and the second exhaust port 11.

[0028] Specifically, the intake valve 1 and the exhaust valve 2 in the present application can both adopt two-position three-way solenoid valves, and the two outlet ends of the intake valve 1 are respectively connected to the first air inlet 8 and the second air inlet 10, and the intake end of the intake valve 1 is used to connect with an external device. The intake valve 1 can switch between the first air inlet 8 and the second air inlet 10, that is, the intake valve 1 includes a connection state between the intake end and the first air inlet 8 and a connection state between the intake end and the second air inlet 10; the two intake ends of the exhaust valve 2 are respectively connected to the first exhaust port 9 and the second exhaust port 11, and the outlet end of the exhaust valve 2 is connected to the outside world, that is, the exhaust valve 2 includes a connection state between the outlet end and the first exhaust port 9 and a connection state between the outlet end and the second exhaust port 11.

[0029] In some embodiments, the first air inlet 8 is arranged near the bottom of the first container 6, and the second air inlet 10 is arranged near the bottom of the second container 7; the first exhaust port 9 is arranged near the top of the first container 6 to ensure that the gas in the first container 6 can be discharged from the top, and the second exhaust port 11 is arranged near the top of the second container 7 to ensure that the gas in the second container 7 can be discharged from the top.

[0030] In some embodiments, the first exhaust port 9 and the second exhaust port 11 are arranged on opposite end surfaces from the connecting hole 5 on the corresponding container, so as to prevent the gas entering the first exhaust port 9 or the second exhaust port 11 from entering the other container through the connecting hole 5.

[0031] In some embodiments, the inlet and outlet valve 4 includes a water inlet and two water outlets. The water inlet is used to communicate with the outside world. It can be connected to an external water source to replenish water into the first container 6 and the second container 7. It can also be connected to an external drain pipe to discharge the water in the first container 6 and the second container 7. The two water outlets are respectively connected to the connecting hole 5. The inlet and outlet valve 4 includes a water inlet state and a connecting state; in the water inlet state, the water inlet is connected to the two containers through the two water outlets; in the connecting state, the water inlet is closed, and the two containers are connected to each other through the two water outlets. At this time, the inlet and outlet valve 4 plays the role of connecting the first container 6 and the second container 7.

[0032] In the present application, liquid needs to be replenished during the first use. The liquid can be water. The volumes of the first container 6 and the second container 7 can be the same. The total amount of water replenished in the first container 6 and the second container 7 should not exceed the volume of the container with the smaller capacity. When the volumes of the first container 6 and the second container 7 are the same, the total amount of water replenished should not exceed the volume of any container. For example, the volumes of the first container 6 and the second container 7 can both be 200 ml. In this case, the amount of water replenished can be about 200 ml. After the replenishment is completed, the first container 6 and the second container 7 both have about 100 ml of water.

[0033] During the first desorption process, the desorbed gas enters the first container 6 through the inlet valve 1, forcing the water in the first container 6 into the second container 7. At this point, the weight of the first container 6 begins to decrease, while the weight of the second container 7 begins to increase. When the weight of the first container 6 drops by 80g (or the weight difference between the two containers is 160g), the inlet valve 1 and the exhaust valve 2 are switched, so that the first inlet port 8 of the first container 6 is closed and the first exhaust port 9 is opened. The second inlet port 10 of the second container 7 is opened and the second exhaust port 11 is closed. The desorbed gas now enters the second container 7 and forces the water in the second container 7 into the first container 6. At this point, the weight of the second container 7 begins to decrease, while the weight of the first container 6 begins to increase. When the weight of the second container 7 drops by approximately 160g (or the weight difference between the two containers is 160g), the inlet valve 1 and the exhaust valve 2 are switched again, and this cycle is repeated until gas desorption is complete.

[0034] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", "some examples", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A rapid measuring instrument for underground coal seam gas content, characterized in that: It includes a container, an air intake valve, an exhaust valve, a weighing sensor and an inlet and outlet valve. There are two containers. The air intake valve, the exhaust valve and the inlet and outlet valves are all connected to the containers. A connecting hole is provided near the bottom of the container. The containers are connected through the connecting hole. The bottom of each container is provided with the weighing sensor. One of the containers is connected to the outside world through the air intake valve and is closed to the outside world through the exhaust valve. The other container is closed to the outside world through the air intake valve and connected to the outside world through the exhaust valve.

2. The underground coal seam gas content rapid measuring instrument according to claim 1, characterized in that: The container includes a first container and a second container, the first container is provided with a first air inlet and a first exhaust port, the second container is provided with a second air inlet and a second exhaust port, the first air inlet and the second air inlet are both connected to the air inlet valve, and the first exhaust port and the second exhaust port are both connected to the exhaust valve.

3. The underground coal seam gas content rapid measuring instrument according to claim 2, characterized in that: The air inlet valve and the exhaust valve are both two-position three-way solenoid valves. The two air outlet ends of the air inlet valve are respectively connected to the first air inlet and the second air inlet. The air inlet end of the air inlet valve is used to communicate with an external device. The two air inlet ends of the exhaust valve are respectively connected to the first exhaust port and the second exhaust port, and the air outlet end of the exhaust valve is connected to the outside world.

4. The underground coal seam gas content rapid measuring instrument according to claim 2, characterized in that: The first air inlet is arranged near the bottom of the first container, and the second air inlet is arranged near the bottom of the second container; the first exhaust port is arranged near the top of the first container, and the second exhaust port is arranged near the top of the second container.

5. The underground coal seam gas content rapid measuring instrument according to claim 4, characterized in that: The first exhaust port and the second exhaust port are arranged on opposite end surfaces corresponding to the communicating hole on the container.

6. The underground coal seam gas content rapid measuring instrument according to claim 1, characterized in that: The inlet and outlet valve includes a water inlet and two water outlets, the water inlet is used to communicate with the outside world, and the two water outlets are respectively connected to the connecting holes. The inlet and outlet valve includes a water inlet state and a connecting state; in the water inlet state, the water inlet is connected to the two containers through the two water outlets; in the connecting state, the water inlet is closed, and the two containers are connected to each other through the two water outlets.

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