High negative pressure gas extractor

Abstract

The utility model discloses a kind of high negative pressure gas adoptors, including air inlet connector, air outlet connector, air cylinder and pull rod, air cylinder includes cylindrical inner cavity, one end of pull rod is inserted in inner cavity, the end of pull rod in inner cavity is equipped with piston, the end of pull rod outside inner cavity is equipped with operating handle, operating handle is equipped with stabilizer on the face of air cylinder, air cylinder is equipped with the jack for stabilizer insertion on the end face of operating handle, the length of jack along inner cavity axial direction is greater than or equal to the length of inner cavity along its axial direction, the length of stabilizer is greater than or equal to the length of inner cavity along its axial direction, operator pushes and pulls pull rod by operating handle, compared with prior art, the utility model is matched by stabilizer and jack, so that operator can stably push and pull pull rod, so that pull rod makes linear motion along the axial direction of air cylinder, so that the service life of piston is extended, and the subsequent detection accuracy is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of gas sampling devices, specifically relating to a high negative pressure gas sampling device. Background Technology

[0002] A high-negative-pressure gas sampler is a specialized tool used in gas extraction pipeline systems to collect gas samples under negative pressure. It is primarily used in environments such as underground coal mines, metallurgy, chemical plants, coking plants, gas stations, and tunnel engineering to quickly determine the concentration of various gases in the environment. The high-negative-pressure gas sampler consists of components such as an inlet connector, an outlet connector, a pull rod, a piston, a gas cylinder, and a sealing ring.

[0003] When pushing or pulling the existing pull rod, it is difficult to make the pull rod move in a straight line along the cylinder axis. This can easily cause uneven force on the piston, which can lead to deformation of the piston after repeated use, affecting the sealing performance and thus the test results. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a high negative pressure gas extractor that is more stable than the existing technology.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a high negative pressure gas extractor, comprising an air inlet connector, an air outlet connector, an air cylinder, and a pull rod. The air cylinder includes a cylindrical inner cavity. One end of the pull rod is inserted into the inner cavity. A piston is provided at the end of the pull rod located inside the inner cavity. An operating handle is provided at the end of the pull rod located outside the inner cavity. A stabilizing rod is provided on the surface of the operating handle facing the air cylinder. An insertion hole for inserting the stabilizing rod is provided on the end face of the air cylinder facing the operating handle. The length of the insertion hole along the axial direction of the inner cavity is greater than or equal to the length of the inner cavity along its own axial direction. The length of the stabilizing rod is greater than or equal to the length of the inner cavity along its own axial direction.

[0006] Using the above solution, the operator pushes and pulls the lever by operating the handle. Compared with the prior art, this utility model, through the cooperation of the stabilizing rod and the insertion hole, enables the operator to push and pull the lever stably, so that the lever moves linearly along the axis of the air cylinder, making the piston more evenly stressed, extending the service life of the piston, and improving the accuracy of subsequent testing.

[0007] As a further feature of this invention, there are two stabilizer rods that are rotationally symmetrical about the axis of the pull rod, and there are two insertion holes that are rotationally symmetrical about the axis of the inner cavity.

[0008] The above solution makes the pull rod pull more stable.

[0009] As a further feature of this invention, the cross-section of the outer wall of the air cylinder along its own radial direction is elliptical, the major axis of the cross-section of the outer wall of the air cylinder along its own radial direction passes through both insertion holes, and the minimum distance from the inner cavity to the outer wall of the air cylinder is less than or equal to the distance from the inner cavity to the insertion hole.

[0010] The above solution makes the surface of the air pump smoother, making it easier to hold and assemble.

[0011] As a further feature of this invention, the insertion hole is circumferentially curved along the inner cavity, and the shape of the cross-section of the stabilizing rod along the radial direction of the tie rod is complementary to the shape of the cross-section of the insertion hole along the radial direction of the tie rod.

[0012] The above solution ensures that the stabilizer bar moves steadily into and out of the socket, providing better stability.

[0013] As a further feature of this invention, the operating handle is elongated, the two stabilizing rods are respectively disposed at both ends of the operating handle, and the pull rod is connected to the middle of the operating handle.

[0014] The above solution makes it convenient for operators to pull out the parts.

[0015] As a further feature of this utility model, the surface of the operating handle facing the air cylinder is provided with a groove, the groove being an arc-shaped through groove, and there are two grooves, which are provided on both sides of the pull rod.

[0016] The above solution makes it easier for operators to apply tension to the operating handle.

[0017] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0018] Appendix Figure 1 This is an external schematic diagram of a specific embodiment of the present utility model;

[0019] Appendix Figure 2 This is a cross-sectional view of a specific embodiment of the present utility model;

[0020] Appendix Figure 3 This is a cross-sectional view of the air cylinder according to a specific embodiment of the present utility model.

[0021] Air inlet connector 1, air outlet connector 2, air cylinder 3, inner cavity 31, insertion hole 32, pull rod 4, piston 5, operating handle 6, groove 61, stabilizer bar 7. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise specified, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] Specific embodiments of this utility model are shown in the accompanying drawings.

[0025] A high negative pressure gas sampler includes an inlet connector 1, an outlet connector 2, an air cylinder 3, and a pull rod 4. The air cylinder 3 includes a cylindrical inner cavity 31. One end of the pull rod 4 is inserted into the inner cavity 31. A piston 5 is provided at the end of the pull rod 4 inside the inner cavity 31, and an operating handle 6 is provided at the end of the pull rod 4 outside the inner cavity 31. A stabilizing rod 7 is provided on the surface of the operating handle 6 facing the air cylinder 3. An insertion hole 32 for inserting the stabilizing rod 7 is provided on the end surface of the air cylinder 3 facing the operating handle 6. The length of the insertion hole 32 along the axial direction of the inner cavity 31 is greater than the length of the inner cavity 31 along its own axial direction, and the length of the stabilizing rod 7 is greater than the length of the inner cavity 31 along its own axial direction. The operator pushes and pulls the pull rod 4 by operating the handle 6. Compared with the prior art, this embodiment, through the cooperation of the stabilizing rod 7 and the insertion hole 32, allows the operator to push and pull the pull rod 4 stably, making the pull rod 4 move linearly along the axial direction of the air cylinder 3, making the piston 5 more evenly stressed, extending the service life of the piston 5, and improving the detection accuracy.

[0026] There are two stabilizer bars 7, which are rotationally symmetrical about the axis of the pull rod 4, and two insertion holes 32, which are rotationally symmetrical about the axis of the inner cavity 31. This makes the pull rod 4 more stable when pulled.

[0027] The outer wall of the air cylinder 3 has an elliptical cross-section along its own radial direction. The major axis h of the cross-section of the outer wall of the air cylinder 3 along its own radial direction passes through both insertion holes 32. The minimum distance from the inner cavity 31 to the outer wall of the air cylinder 3 is equal to the distance from the inner cavity 31 to the insertion hole 32. This makes the outer surface of the air cylinder 3 flatter, which is convenient for holding and assembling in this embodiment.

[0028] The insertion hole 32 is curved circumferentially along the inner cavity 31, and the shape of the cross-section of the stabilizer rod 7 along the radial direction of the tie rod 4 is complementary to the shape of the cross-section of the insertion hole 32 along the radial direction of the tie rod 4. This allows the stabilizer rod 7 to move stably into and out of the insertion hole 32, providing better stability.

[0029] The operating handle 6 is elongated, with two stabilizing rods 7 positioned at both ends. The pull rod 4 is connected to the middle of the operating handle 6, facilitating easy pulling by the operator.

[0030] The operating handle 6 has a groove 61 on the surface facing the air cylinder 3. The groove 61 is an arc-shaped through groove. There are two grooves 61, which are located on both sides of the pull rod 4. This makes it convenient for the operator to apply pulling force to the operating handle 6.

[0031] This utility model is not limited to the specific embodiments described above. Those skilled in the art can implement this utility model using other specific embodiments based on the content disclosed in this utility model. Any simple changes or modifications made to the design structure and concept of this utility model will fall within the protection scope of this utility model.

Claims

1. A high negative pressure gas extractor, comprising an inlet connector, an outlet connector, an air cylinder, and a pull rod, wherein the air cylinder includes a cylindrical inner cavity, one end of the pull rod is inserted into the inner cavity, a piston is provided at the end of the pull rod located within the inner cavity, and an operating handle is provided at the end of the pull rod located outside the inner cavity, characterized in that: The operating handle has a stabilizing rod on its side facing the air cylinder, and the end face of the air cylinder facing the operating handle has a socket for inserting the stabilizing rod. The length of the socket along the axial direction of the inner cavity is greater than or equal to the length of the inner cavity along its own axial direction. The length of the stabilizing rod is greater than or equal to the length of the inner cavity along its own axial direction. There are two stabilizing rods that are rotationally symmetrical about the axis of the pull rod, and there are two sockets that are rotationally symmetrical about the axis of the inner cavity.

2. The high negative pressure gas extractor according to claim 1, characterized in that: The outer wall of the air cylinder has an elliptical cross-section along its own radial direction. The major axis of the cross-section of the outer wall of the air cylinder passes through both insertion holes. The minimum distance from the inner cavity to the outer wall of the air cylinder is less than or equal to the distance from the inner cavity to the insertion hole.

3. A high negative pressure gas extractor according to claim 2, characterized in that: The insertion hole is circumferentially curved along the inner cavity, and the shape of the cross-section of the stabilizer rod along the radial direction of the tie rod is complementary to the shape of the cross-section of the insertion hole along the radial direction of the tie rod.

4. A high negative pressure gas extractor according to claim 3, characterized in that: The operating handle is elongated, with two stabilizing rods respectively located at both ends of the operating handle, and the pull rod connected to the middle of the operating handle.

5. A high negative pressure gas extractor according to claim 4, characterized in that: The operating handle has a groove on the surface facing the air cylinder. The groove is an arc-shaped through groove. There are two grooves, which are located on both sides of the pull rod.

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