Underground gas sampling device for power tunnel construction

Abstract

This utility model discloses an underground gas sampling device for power tunnel construction, relating to the field of gas sampling technology. The device includes a fixed block with an internal cavity and a movable cavity. The top of the internal cavity and the bottom of the movable cavity are slidably mounted on an L-shaped push-pull rod. A piston is fixedly mounted on the top of the L-shaped push-pull rod and movably mounted inside the movable cavity. An air inlet is located on the top of the fixed block and communicates with the movable cavity. A sealing assembly is also included inside the movable cavity. This underground gas sampling device for power tunnel construction, through the coordinated use of the pushing assembly and a timer starter, can intermittently push three L-shaped push-pull rods and the piston downwards, creating negative pressure inside the movable cavity. This allows for the extraction of three sets of air into the three movable cavities at three different time periods, achieving multi-sample collection and improving gas detection accuracy in subsequent gas detection processes.

Description

Technical Field

[0001] This utility model relates to the field of gas sampling technology, and in particular to an underground gas sampling device for power tunnel construction. Background Technology

[0002] Because of poor air circulation inside tunnels, harmful gases (such as methane, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia, etc.) tend to accumulate. Therefore, in order to ensure construction safety, it is necessary to collect the gas in the tunnel every day and send the collected gas to a testing unit for testing.

[0003] For example, Chinese patent document CN218512127U discloses a gas sampling device, including a sealed container, a gas sampling bag, and a gas pump. The sealed container is equipped with a sampling interface and a suction interface. The gas sampling bag is placed inside the sealed container and connected to the sampling interface, and the gas pump is connected to the suction interface. By providing a sampling interface for connecting to the gas sampling bag and a suction interface for connecting to the gas pump on the sealed container, and placing the gas sampling bag inside the sealed container, when sampling the gas to be tested, after the sealed container is evacuated by the gas pump, the gas sample to be tested can directly enter the gas sampling bag through the sampling interface. This improves sampling efficiency and avoids contamination of the gas pump pipeline by some malodorous gas samples.

[0004] However, the gas sampling device mentioned above can only collect gas once during use, which will affect the detection accuracy in subsequent gas detection processes. Utility Model Content

[0005] The purpose of this invention is to provide an underground gas sampling device for power tunnel construction, so as to solve the problems and defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an underground gas sampling device for power tunnel construction, comprising a fixed block, wherein the fixed block has an organic cavity and a movable cavity, the top of the organic cavity and the bottom of the movable cavity are slidably mounted on an L-shaped push-pull rod, a piston is fixedly mounted on the top of the L-shaped push-pull rod, the piston is movably mounted inside the movable cavity, an air inlet is provided on the top of the fixed block, the air inlet communicates with the movable cavity, and a sealing assembly is also provided inside the movable cavity to seal the air inlet, and a pushing assembly is mounted on the fixed block to drive the L-shaped push-pull rod and the piston to descend.

[0007] Preferably, the sealing assembly includes a cross, a push spring, and a sealing block. The cross is fixedly installed on the inner wall of the movable cavity, the push spring is fixedly installed on the top of the cross, the sealing block is fixedly installed on the top of the push spring, the sealing block extends into the air inlet, and the bottom of the cross contacts the top of the piston.

[0008] Preferably, the pushing assembly includes a servo motor, guide rods, threaded rods, and a V-shaped push plate. The servo motor is fixedly installed on one side of the outer wall of the fixed block. Two guide rods are fixedly installed on both sides of the machine cavity. The threaded rods are rotatably installed on both sides of the machine cavity. The V-shaped push plate is slidably installed on the outer wall of the guide rods, and the V-shaped push plate is threaded onto the threaded rods. The output shaft of the servo motor is fixedly installed on one end of the threaded rod, which can push the three L-shaped push-pull rods and the piston downward, thereby driving the interior of the movable cavity to generate negative pressure and drawing three sets of air into the inner side of the three movable cavities, realizing multi-set data acquisition.

[0009] Preferably, the outer wall of the L-shaped push-pull rod is fitted with a return spring, and the return spring is fixedly installed at the bottom of the piston.

[0010] Preferably, an exhaust pipe is fixedly installed on the front side of the fixed block, the exhaust pipe is connected to the interior of the movable cavity, and a valve is provided on the exhaust pipe.

[0011] Preferably, a control panel is fixedly installed on the front outer wall of the fixing block.

[0012] Preferably, a timer starter is fixedly installed on the outer wall of the servo motor.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This underground gas sampling device for power tunnel construction, through the intermittent use of the push component and the timer starter, can push three L-shaped push-pull rods and pistons downwards, creating negative pressure inside the active chamber. At three different time periods, three sets of air are drawn into the inner side of the three active chambers, achieving multiple sets of sampling. This improves the gas detection accuracy in subsequent gas detection processes. Through the sealing component, the air inlet can be sealed after gas sampling to prevent gas from flowing between the inside and outside of the active chamber, further improving the gas detection accuracy. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the fixing block of this utility model;

[0018] Figure 3 for Figure 2 A schematic diagram of the structure on the other side.

[0019] Reference numerals: 1. Fixed block; 2. Machine cavity; 3. Moving cavity; 4. Air inlet; 5. Piston; 6. L-shaped push-pull rod; 7. Servo motor; 8. Guide rod; 9. Threaded rod; 10. V-shaped push plate; 11. Cross; 12. Push spring; 13. Sealing block; 14. Return spring; 15. Exhaust pipe; 16. Valve; 17. Control panel; 18. Timer starter. Detailed Implementation

[0020] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0021] Please see Figure 1-3 This utility model provides a technical solution: an underground gas sampling device for power tunnel construction, including a fixed block 1, the fixed block 1 having an organic cavity 2 and a movable cavity 3, the top of the organic cavity 2 and the bottom of the movable cavity 3 being slidably mounted on an L-shaped push-pull rod 6, the top of the L-shaped push-pull rod 6 being fixedly mounted on a piston 5, the piston 5 being movably mounted inside the movable cavity 3, the top of the fixed block 1 having an air inlet 4, the air inlet 4 communicating with the movable cavity 3, and also including a sealing assembly installed inside the movable cavity 3, the sealing assembly being used to seal the air inlet 4, and a pushing assembly installed on the fixed block 1, the pushing assembly being used to drive the L-shaped push-pull rod 6 and the piston 5 to descend.

[0022] Furthermore, the sealing assembly includes a cross 11, a push spring 12, and a sealing block 13. The cross 11 is fixedly installed on the inner wall of the movable cavity 3, the push spring 12 is fixedly installed on the top of the cross 11, and the sealing block 13 is fixedly installed on the top of the push spring 12. The sealing block 13 extends into the air inlet 4, and the bottom of the cross 11 contacts the top of the piston 5. Due to the push of the push spring 12 on the sealing block 13, the sealing block 13 blocks the air inlet 4.

[0023] Furthermore, the driving component includes a servo motor 7, a guide rod 8, a threaded rod 9, and a V-shaped push plate 10. The servo motor 7 is fixedly installed on one side of the outer wall of the fixed block 1. Two guide rods 8 are fixedly installed on both sides of the machine cavity 2. The threaded rod 9 is rotatably installed on both sides of the machine cavity 2. The V-shaped push plate 10 is slidably installed on the outer wall of the guide rod 8 and threadedly installed on the threaded rod 9. The output shaft of the servo motor 7 is fixedly installed on one end of the threaded rod 9. The output shaft of the servo motor 7 drives the threaded rod 9 to rotate. The rotation of the threaded rod 9 drives the V-shaped push plate 10 to move. The movement of the V-shaped push plate 10 pushes the L-shaped push rod 6 and the piston 5 downward, which can generate negative pressure inside the movable cavity 3 above the piston 5, and can draw three sets of air into the inside of the three movable cavities 3, realizing multi-set acquisition.

[0024] Furthermore, a return spring 14 is sleeved on the outer wall of the L-shaped push-pull rod 6, and the return spring 14 is fixedly installed on the bottom of the piston 5.

[0025] Furthermore, an exhaust pipe 15 is fixedly installed on the front side of the fixed block 1. The exhaust pipe 15 communicates with the interior of the movable cavity 3, and a valve 16 is provided on the exhaust pipe 15.

[0026] Furthermore, a control panel 17 is fixedly installed on the front outer wall of the fixing block 1.

[0027] Furthermore, a timer starter 18 is fixedly installed on the outer wall of the servo motor 7.

[0028] Working principle: The device is placed in the tunnel. The servo motor 7 is started on a timer via the control panel 17 and the timer starter 18. The output shaft of the servo motor 7 drives the threaded rod 9 to rotate. The rotation of the threaded rod 9 drives the V-shaped push plate 10 to move. The movement of the V-shaped push plate 10 pushes the L-shaped push rod 6 and the piston 5 downward, which can generate negative pressure inside the movable chamber 3 above the piston 5. Air is drawn into the inside of the movable chamber 3 through the air inlet 4. Due to the push of the spring 12 on the sealing block 13, the sealing block 13 blocks the air inlet 4, storing the gas and realizing the collection.

[0029] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An underground gas sampling device for power tunnel construction, comprising a fixed block (1), the fixed block (1) having an organic chamber (2) and a movable chamber (3), the top of the organic chamber (2) and the bottom of the movable chamber (3) being slidably mounted on an L-shaped push-pull rod (6), a piston (5) being fixedly mounted on the top of the L-shaped push-pull rod (6), the piston (5) being movably mounted inside the movable chamber (3), and an air inlet (4) being provided on the top of the fixed block (1), the air inlet (4) being connected to the movable chamber (3), characterized in that, Also includes: A sealing assembly installed inside the active cavity (3) is used to seal the air inlet (4); The push assembly is mounted on the fixed block (1) and is used to drive the L-shaped push rod (6) and piston (5) down.

2. The underground gas sampling device for power tunnel construction according to claim 1, characterized in that: The sealing assembly includes a cross (11), a push spring (12), and a sealing block (13). The cross (11) is fixedly installed on the inner wall of the movable cavity (3), the push spring (12) is fixedly installed on the top of the cross (11), and the sealing block (13) is fixedly installed on the top of the push spring (12). The sealing block (13) extends into the air inlet (4), and the bottom of the cross (11) contacts the top of the piston (5).

3. The underground gas sampling device for power tunnel construction according to claim 2, characterized in that: The pushing assembly includes a servo motor (7), a guide rod (8), a threaded rod (9), and a V-shaped push plate (10). The servo motor (7) is fixedly installed on one side of the outer wall of the fixed block (1). There are two guide rods (8), both of which are fixedly installed on both sides of the machine cavity (2). The threaded rod (9) is rotatably installed on both sides of the machine cavity (2). The V-shaped push plate (10) is slidably installed on the outer wall of the guide rod (8), and the V-shaped push plate (10) is threadedly installed on the threaded rod (9). The output shaft of the servo motor (7) is fixedly installed on one end of the threaded rod (9).

4. The underground gas sampling device for power tunnel construction according to claim 3, characterized in that: The outer wall of the L-shaped push-pull rod (6) is fitted with a return spring (14), and the return spring (14) is fixedly installed at the bottom of the piston (5).

5. The underground gas sampling device for power tunnel construction according to claim 4, characterized in that: An exhaust pipe (15) is fixedly installed on the front side of the fixed block (1). The exhaust pipe (15) communicates with the interior of the movable cavity (3). A valve (16) is provided on the exhaust pipe (15).

6. The underground gas sampling device for power tunnel construction according to claim 5, characterized in that: A control panel (17) is fixedly installed on the front outer wall of the fixing block (1).

7. The underground gas sampling device for power tunnel construction according to claim 6, characterized in that: A timer starter (18) is fixedly installed on the outer wall of the servo motor (7).

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