Gas sampling device for environmental protection detection

Abstract

The utility model belongs to the field of gas sampling devices, and particularly relates to a gas sampling device for environmental protection detection, which comprises a sampling box, an automatic sealing mechanism is arranged inside the sampling box, an exhaust pipe is connected inside the lower end of the sampling box through threads, and a pushing frame is fixedly connected inside the upper end of the exhaust pipe. Two symmetrically distributed guide nails are fixedly connected to the bottom of the inner side of the sampling box, and movable plates are slidably connected to the outer sides of the two guide nails. According to the gas sampling device, the structures such as the transverse strip, the guide rod and the sealing gasket are additionally arranged in the sampling box, when gas is sampled, the internal pressure of the sampling box is reduced, the sealing gasket is driven to move, the second spring is compressed, when the sealing gasket is separated from the sampling box, the gas can be sucked into the sampling box, after sampling is completed, the pressure disappears, and the sampling effect is good. A spring II can drive a sealing gasket to seal the sampling box through elastic force, so that the device is more convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of gas sampling devices, in particular to a gas sampling device for environmental protection detection. Background Art

[0002] According to the patent authorization announcement number: CN211978454U, a gas sampling device for environmental detection is proposed. The utility model discloses a gas sampling device for environmental detection, including a support plate, a grip, a vacuum pump, a fixed clamp, a uniform suction drive, a power module and a control button. The grip is arranged on the bottom wall of the support plate, the fixed clamp is arranged on the upper wall of the support plate and away from the grip, the vacuum pump can be detachably clamped in the fixed clamp, the uniform suction drive is arranged on the support plate and close to the fixed clamp, the power module is arranged on the support plate and close to the uniform suction drive, the control button is arranged on the support plate and close to the power module, and the control button is electrically connected to the power module. The utility model belongs to the field of environmental detection technology, and specifically refers to a gas sampling device for environmental detection that controls the suction pump pulling speed at a uniform speed through a servo motor to improve the sampling credibility.

[0003] However, in the process of using the sampling device in the prior art, after sampling the gas, the sampling port needs to be manually sealed, which easily causes gas leakage inside the sampling box during the operation, affecting the sampling quality, and when sampling is required at multiple locations in an area, the sample needs to be injected into the storage device after sampling, which is cumbersome and affects the sampling efficiency. Therefore, it is necessary to improve the prior art. Utility Model Content

[0004] The utility model aims to provide a gas sampling device for environmental protection detection, which solves the problems of inconvenience in sealing after sampling and low efficiency when too much sampling is performed.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas sampling device for environmental detection, comprising a sampling box, an automatic sealing mechanism is arranged inside the sampling box, an exhaust pipe is threadedly connected to the inside of the lower end of the sampling box, a pushing frame is fixedly connected to the upper end of the exhaust pipe, two symmetrically distributed guide pins are fixedly connected to the inner bottom of the sampling box, movable plates are slidably connected to the outer sides of the two guide pins, a sealing plug is fixedly connected between the two movable plates, and a spring is arranged on the outer side of the guide pin.

[0006] Preferably, a piston is slidably connected inside the air extraction pipe, and a pulling frame is fixedly connected to the lower end of the piston, and the pulling frame can drive the piston to move.

[0007] Preferably, the pushing frame is in contact with the sealing plug, and a sealed tube is fixedly connected to the inner bottom of the sampling box, and the sealing plug can seal the sealed tube.

[0008] Preferably, one end of the spring 1 is fixedly connected to the guide pin, and the other end of the spring 1 is fixedly connected to the movable plate, and the spring 1 can drive the movable plate to automatically reset through elastic force.

[0009] Preferably, the automatic sealing mechanism includes a horizontal bar, the inner wall of the air inlet of the sampling box is fixedly connected with the horizontal bar, the interior of the horizontal bar is slidably connected with two symmetrically distributed guide rods, the lower end of the guide rod is fixedly connected with a guide plate, the lower end of the guide plate is fixedly connected with a sealing gasket, the upper end of the guide rod is fixedly connected with a fixed plate, and a spring 2 is provided on the outer side of the guide rod, and the guide rod can guide the movement of the guide plate.

[0010] Preferably, one end of the second spring is fixedly connected to the fixed plate, and the other end of the second spring is fixedly connected to the horizontal bar, and the second spring can drive the fixed plate to automatically reset through elastic force.

[0011] Preferably, the guide plate is slidably connected to the sampling box, the guide plate is in contact with the horizontal bar, the sealing gasket is slidably connected to the sampling box, and the sealing gasket can seal the sampling box.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. The utility model adds structures such as horizontal bars, guide rods and sealing gaskets inside the sampling box. When sampling the gas, the internal pressure of the sampling box is reduced, driving the sealing gasket to move and compressing the second spring. When the sealing gasket is separated from the sampling box, the gas can be sucked into the interior of the sampling box. After the sampling is completed, the pressure disappears, and the second spring can drive the sealing gasket to seal the sampling box through elastic force, thereby making the device more convenient to use.

[0014] 2. The utility model adds sealing plugs, guide pins, and a push frame to the interior of the sampling box. After sampling is completed, the sampling box can be removed from the upper end of the exhaust pipe. After removal, a spring can drive the sealing plug to slide into the interior of the closed tube through elastic force to complete the sealing of the sampling box. In the process of sampling at multiple locations, it is only necessary to carry multiple sampling boxes and replace them, which can effectively improve the sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0016] Figure 2 For the utility model Figure 1 A three-dimensional cross-sectional view of

[0017] Figure 3 For the utility model Figure 2 A magnified view of the structure of part A;

[0018] Figure 4 For the utility model Figure 2 Enlarged view of the structure of part B.

[0019] In the figure: 1. sampling box; 2. automatic sealing mechanism; 3. exhaust pipe; 4. piston; 5. pulling frame; 6. pushing frame; 7. guide pin; 8. moving plate; 9. sealing plug; 10. spring one; 11. sealing tube; 21. horizontal bar; 22. guide rod; 23. guide plate; 24. sealing gasket; 25. fixing plate; 26. spring two. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1 , Figure 2 , Figure 4 A gas sampling device for environmental detection includes a sampling box 1, an automatic sealing mechanism 2 is arranged inside the sampling box 1, an exhaust pipe 3 is threadedly connected to the lower end of the sampling box 1, a pushing frame 6 is fixedly connected to the upper end of the exhaust pipe 3, two symmetrically distributed guide pins 7 are fixedly connected to the inner bottom of the sampling box 1, and movable plates 8 are slidably connected to the outer sides of the two guide pins 7, a sealing plug 9 is fixedly connected between the two movable plates 8, and a spring 10 is arranged on the outer side of the guide pin 7.

[0022] See also Figure 1 , Figure 2 , Figure 4 The inside of the exhaust pipe 3 is slidably connected with a piston 4, and the lower end of the piston 4 is fixedly connected with a pulling frame 5, which can drive the piston 4 to move, and the pushing frame 6 contacts the sealing plug 9. The inner bottom of the sampling box 1 is fixedly connected with a sealed tube 11, and the sealing plug 9 can seal the sealed tube 11. One end of a spring 10 is fixedly connected to the guide pin 7, and the other end of the spring 10 is fixedly connected to the moving plate 8. The spring 10 can drive the moving plate 8 to automatically reset through elastic force.

[0023] See also Figure 1 , Figure 2 , Figure 3The automatic sealing mechanism 2 includes a horizontal bar 21, and the inner wall of the air inlet of the sampling box 1 is fixedly connected with the horizontal bar 21. Two symmetrically distributed guide rods 22 are slidably connected inside the horizontal bar 21. The lower end of the guide rod 22 is fixedly connected with a guide plate 23, and the lower end of the guide plate 23 is fixedly connected with a sealing gasket 24. The upper end of the guide rod 22 is fixedly connected with a fixed plate 25. A spring 26 is arranged on the outer side of the guide rod 22. The guide rod 22 can guide the movement of the guide plate 23. One end of the spring 26 is fixedly connected to the fixed plate 25, and the other end of the spring 26 is fixedly connected to the horizontal bar 21. The spring 26 can drive the fixed plate 25 to automatically reset by elastic force. The guide plate 23 is slidably connected to the sampling box 1, and the guide plate 23 contacts the horizontal bar 21. The sealing gasket 24 is slidably connected to the sampling box 1, and the sealing gasket 24 can seal the sampling box 1.

[0024] The specific implementation process of the utility model is as follows: when in use, the piston 4 is driven to move by pulling the frame 5. The piston 4 can evacuate the interior of the sampling box 1 during the movement. After the gas inside the sampling box 1 is evacuated, negative pressure is generated. The pressure generated by the negative pressure drives the sealing gasket 24 to move. During the movement of the sealing gasket 24, the spring 26 is compressed by the fixing plate 25. When the sealing gasket 24 is separated from the sampling box 1, the air flow can enter the interior of the sampling box 1. When the sampling is completed, the movement of the pulling frame 5 is stopped, the internal pressure of the sampling box 1 is balanced, and the spring 26 is reset. The spring 26 can drive the sealing gasket 24 to press against the inner wall of the sampling box 1 through the elastic force, so as to complete the sealing of the sampling box 1, so that the gas in the environment can be conveniently sampled.

[0025] When it is necessary to sample the gas position, the sampling box 1 is rotated, and the sampling box 1 is driven to move upward through the threaded cooperation with the exhaust pipe 3. During the upward movement, the sampling box 1 drives the push frame 6 to move in the direction of leaving the sealed tube 11. At the same time, the originally compressed spring 10 is reset. The spring 10 can drive the sealing plug 9 to slide into the tube mouth of the sealed tube 11 through elastic force, so as to complete the sealing of the sampling box 1, and then a new sampling box 1 can be replaced to sample again.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas sampling device for environmental detection, comprising a sampling box (1), Features: The sampling box (1) is provided with an automatic sealing mechanism (2) inside, the lower end of the sampling box (1) is connected with an exhaust pipe (3) through a thread, the upper end of the exhaust pipe (3) is fixedly connected with a push frame (6), the inner bottom of the sampling box (1) is fixedly connected with two symmetrically distributed guide pins (7), the outer sides of the two guide pins (7) are slidably connected with a movable plate (8), the two movable plates (8) are fixedly connected with a sealing plug (9), and the outer side of the guide pin (7) is provided with a spring (10).

2. A gas sampling device for environmental detection according to claim 1, Features: The interior of the air extraction pipe (3) is slidably connected to a piston (4), and the lower end of the piston (4) is fixedly connected to a pulling frame (5).

3. A gas sampling device for environmental detection according to claim 1, Features: The pushing frame (6) is in contact with the sealing plug (9), and a sealed tube (11) is fixedly connected to the inner bottom of the sampling box (1).

4. A gas sampling device for environmental detection according to claim 1, Features: One end of the spring one (10) is fixedly connected to the guide pin (7), and the other end of the spring one (10) is fixedly connected to the moving plate (8).

5. A gas sampling device for environmental detection according to claim 1, Features: The automatic sealing mechanism (2) comprises a horizontal bar (21), the inner wall of the air inlet of the sampling box (1) is fixedly connected with the horizontal bar (21), the interior of the horizontal bar (21) is slidably connected with two symmetrically distributed guide rods (22), the lower end of the guide rod (22) is fixedly connected with a guide plate (23), the lower end of the guide plate (23) is fixedly connected with a sealing gasket (24), the upper end of the guide rod (22) is fixedly connected with a fixing plate (25), and a spring 2 (26) is arranged on the outer side of the guide rod (22).

6. A gas sampling device for environmental detection according to claim 5, Features: One end of the second spring (26) is fixedly connected to the fixing plate (25), and the other end of the second spring (26) is fixedly connected to the horizontal bar (21).

7. A gas sampling device for environmental detection according to claim 5, Features: The guide plate (23) is slidably connected to the sampling box (1), the guide plate (23) is in contact with the horizontal bar (21), and the sealing gasket (24) is slidably connected to the sampling box (1).

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