A gas sample negative pressure sampler

Abstract

The utility model discloses a negative pressure gas sample sampler, comprising a vacuum pump, a sampler, and a hose for connecting the vacuum pump and the sampler, wherein a connector is provided on the side of the vacuum pump, a connecting pipe is provided on the end of the hose, a cylindrical groove is provided inside the connecting pipe, a plurality of through holes are evenly provided on the side wall of the cylindrical groove, and a rubber layer is provided on the cylindrical groove. When the vacuum pump is pumping air, the gas sample enters the sampler through the cylindrical groove and the through hole, and after the gas enters the sampler, the rubber layer plays a sealing role to prevent the gas in the sampler from leaking out of the through hole, thus ensuring that the sampled gas will not leak.

Description

Technical Field

[0001] The utility model relates to the technical field of air pressure sampling, in particular to a gas sample negative pressure sampler. Background Art

[0002] Spontaneous combustion of coal mine waste rock heap is a special combustion system with the characteristics of large heat storage and easy re-ignition, which causes waste of resources, environmental pollution, and even explosion accidents. According to preliminary analysis, the spontaneous combustion phenomenon of the waste rock heap of Daheng Coal Mine and the leakage of toxic and harmful gases are closely related to the shallow depth of coal seams, complex surface air leakage channels and negative pressure ventilation. Based on this, in order to ensure the normal production of Daheng Coal Mine, it is of great significance to study the comprehensive management technology of waste rock heaps in shallow buried coal seams.

[0003] However, in the existing gas sampling, the hose connection operation is inconvenient, and after the sampling is completed, the gas is prone to leakage. Utility Model Content

[0004] The utility model aims to solve the above problems and provide a gas sample negative pressure sampler, which is convenient for connecting the hose during on-site sampling and is easy to leak after sampling.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A gas sample negative pressure sampler comprises an air pump, a sampler, and a hose for connecting the air pump and the sampler, wherein a connector is provided on the side of the air pump, a connecting pipe is provided on the end of the hose, a cylindrical groove is provided inside the connecting pipe, a plurality of through holes are evenly provided on the side wall of the cylindrical groove, and a rubber layer is provided on the cylindrical groove.

[0007] Furthermore, the connecting pipe is connected to the connecting head via threads.

[0008] Furthermore, the hose is fixed to the connecting pipe via a clamp.

[0009] Furthermore, the axis of the cylindrical groove overlaps with the axis of the connecting pipe.

[0010] Furthermore, the cylindrical groove is fixed on the inner wall of the connecting pipe through an annular connecting plate.

[0011] The beneficial effects of the utility model are:

[0012] 1. The utility model has a connector on the side of the vacuum pump, a connecting pipe at the end of the hose, a cylindrical groove inside the connecting pipe, a plurality of through holes evenly arranged on the side wall of the cylindrical groove, and a rubber layer on the cylindrical groove. When the vacuum pump is pumping air, the gas sample enters the sampler through the cylindrical groove and the through hole. After the gas enters the sampler, the rubber layer plays a sealing role to prevent the gas in the sampler from leaking out of the through hole. Ensure that the sampled gas will not leak.

[0013] 2. In the utility model, the connecting pipe and the connecting head are connected by threads, and the connecting pipe is directly screwed onto the connecting head, which is convenient for installation and simple and convenient for operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a schematic diagram of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model.

[0017] In the figure: an air pump 1, a sampler 2, a hose 3, a connector 4, a connecting pipe 5, a cylindrical groove 6, a through hole 7, a rubber layer 8, and a clamp 9. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0019] like Figure 1 and Figure 2As shown, a negative pressure sampler for gas sample comprises a vacuum pump 1, a sampler 2, and a hose 3 for connecting the vacuum pump 1 and the sampler 2. A connector 4 is provided on the side of the vacuum pump 1, and a connecting pipe 5 is provided at the end of the hose 3. A cylindrical groove 6 is provided inside the connecting pipe 5. A plurality of through holes 7 are evenly provided on the side wall of the cylindrical groove 6, and a rubber layer 8 is provided on the cylindrical groove 6. When the vacuum pump 1 is pumping gas, the gas sample enters the sampler 2 through the cylindrical groove 6 and the through hole 7. After the gas enters the sampler 2, the rubber layer 8 plays a sealing role to prevent the gas in the sampler 2 from leaking out of the through hole 7. It is ensured that the sampled gas will not leak.

[0020] like Figure 2 As shown, the connecting pipe 5 is connected to the connecting head 4 through threads, and the connecting pipe 5 is directly screwed onto the connecting head 4, which is convenient for installation and simple and convenient operation.

[0021] like Figure 2 As shown, the hose 3 is fixed to the connecting pipe 5 via a clamp 9 .

[0022] The axis of the cylindrical groove 6 overlaps with the axis of the connecting pipe 5 .

[0023] like Figure 2 As shown, the cylindrical groove 6 is fixed on the inner wall of the connecting pipe 5 through an annular connecting plate to ensure the sealing between the cylindrical groove 6 and the inner wall of the connecting pipe 5 .

[0024] In the description of the present invention, it should be noted that the terms "left", "right", "up", "down", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection, it can be a direct connection, it can be an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A negative pressure gas sampler, comprising an air pump (1), a sampler (2), and a hose (3) for connecting the air pump (1) and the sampler (2), wherein a connector (4) is provided on the side of the air pump (1), characterized in that: The end of the hose (3) is provided with a connecting pipe (5), the interior of the connecting pipe (5) is provided with a cylindrical groove (6), a plurality of through holes (7) are evenly arranged on the side wall of the cylindrical groove (6), and a rubber layer (8) is provided on the cylindrical groove (6).

2. A gas sample negative pressure sampler as claimed in claim 1, characterized in that: The connecting pipe (5) is connected to the connecting head (4) via threads.

3. A gas sample negative pressure sampler as claimed in claim 1, characterized in that: The hose (3) is fixed to the connecting pipe (5) via a clamp (9).

4. A gas sample negative pressure sampler as claimed in claim 1, characterized in that: The axis of the cylindrical groove (6) overlaps with the axis of the connecting pipe (5).

5. A gas sample negative pressure sampler as claimed in claim 1, characterized in that: The cylindrical groove (6) is fixed on the inner wall of the connecting pipe (5) via an annular connecting plate.

Images