Gas sampling tube and gas detector

Abstract

The utility model discloses a gas sampling pipe which comprises a sampling head and a filter, and further comprises a corrugated pipe, the sampling head is sleeved outside one end of the corrugated pipe, the filter is sleeved outside the other end of the corrugated pipe, a gas guide pipe is coaxially sleeved in the corrugated pipe, and the gas guide pipe is communicated with the sampling head and the filter. The sampling head and the filter are connected through the corrugated pipe, so that the sampling head can be bent towards all directions to detect and fix the position, comprehensive gas detection of a place where the sampling head is located is realized, the safety of people in the place is greatly improved, and meanwhile, the sampling head and the filter are connected through the corrugated pipe. The gas guide pipe for communicating the sampling head with the filter is arranged in the corrugated pipe, so that the sampling accuracy is prevented from being influenced by gas or smell emitted by the corrugated pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of gas sampling and detection, in particular to a gas sampling tube and a gas detector. Background Art

[0002] A gas detector is an instrument for detecting gas concentration. It is suitable for dangerous places where flammable or toxic gases exist. It can continuously detect the content of the gas in the air within the lower explosion limit for a long time. It can be widely used in various industries such as gas, petrochemical, metallurgy, steel, coking, and electricity where flammable or toxic gases exist. It is an ideal monitoring instrument to ensure property and personal safety.

[0003] Existing gas detectors generally use a rubber sampling head to collect gas, filter it through a filter, and then input it into the instrument for detection. However, the existing sampling head is short and cannot be bent. In actual gas detection, in some cases, it is impossible to go deep into the designated place for detection, and it is impossible to conduct a comprehensive detection of the place, which reduces the accuracy of the detection and seriously affects the safety of people in the place. Summary of the invention

[0004] In view of the above problems existing in the existing gas detectors, the present invention aims to provide a gas sampling tube and a gas detector with comprehensive detection, high accuracy and high stability.

[0005] The specific technical solutions are as follows:

[0006] A gas sampling tube comprises a sampling head and a filter, and also comprises: a bellows, wherein the sampling head is sleeved on the outside of one end of the bellows, and the filter is sleeved on the outside of the other end of the bellows, an air guide tube is coaxially sleeved inside the bellows, and the air guide tube is connected with the sampling head and the filter.

[0007] As a further improvement and optimization of this solution, the air duct and the sampling head, as well as the air duct and the filter are connected via a pagoda connector.

[0008] As a further improvement and optimization of the present solution, a locking structure is provided between the bellows and the sampling head, and between the bellows and the filter, for locking the bellows and the sampling head, and the filter.

[0009] As a further improvement and optimization of the present solution, the locking structure includes at least one locking hole radially arranged on the outer wall of the sampling head / the outer wall of the filter, and a locking screw is installed in the inner thread of the locking hole, and the locking screw contacts the outer wall of the bellows to lock the bellows.

[0010] As a further improvement and optimization of the present solution, two locking holes are provided on the outer wall of the sampling head and the outer wall of the filter. The two locking holes are respectively located on both sides of the sampling head / the filter, and a locking screw is threadedly installed in each locking hole.

[0011] As a further improvement and optimization of this solution, a support sleeve is provided on the outer sleeve of one end of the filter away from the bellows.

[0012] As a further improvement and optimization of this solution, the support sleeve is made of metal material.

[0013] As a further improvement and optimization of the present solution, the filter has a root part at one end close to the sampling head, and the other end of the bellows is sleeved in the root part.

[0014] As a further improvement and optimization of this solution, the bellows is made of lightweight stainless steel material.

[0015] A gas detector comprises a detector body and a sampling tube interface disposed on the detector body, wherein the sampling tube interface is used to connect any of the above-mentioned gas sampling tubes.

[0016] Compared with the prior art, the above technical solution has the following positive effects:

[0017] (1) In the utility model, a bellows is used to connect the sampling head and the filter, so that the sampling head can be bent in all directions for detection and fixed in position, thereby realizing comprehensive gas detection in the place, greatly improving the safety of people in the place. At the same time, an air duct for connecting the sampling head and the filter is provided inside the bellows, so as to avoid the gas or smell emitted by the bellows itself affecting the accuracy of sampling.

[0018] (2) In order to improve the air tightness of the gas sampling circuit in the present invention, pagoda-shaped joints are used on both sides of the gas guide tube. After the gas is inhaled from the sampling head, it directly passes through the gas guide tube to reach the filter, thereby ensuring the accuracy of the sampled gas concentration.

[0019] (3) In order to prevent the bellows from falling off from the sampling head or the filter when the bellows makes multiple turns, a locking structure is provided between the bellows and the sampling head, and between the bellows and the filter, for locking the bellows and the sampling head or the filter.

[0020] (4) In order to prevent the bottom of the filter from breaking due to multiple bending of the bellows or bending with force, the utility model provides a support sleeve on the outside of the end of the filter away from the bellows to increase the force bearing capacity, thereby preventing the filter from breaking due to excessive bending stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a gas sampling tube of the utility model;

[0022] Figure 2 This is a cross-sectional view of a gas sampling tube of the utility model;

[0023] Figure 3 This is a schematic diagram of the connection between the bellows and the sampling head of a gas sampling tube of the utility model;

[0024] Figure 4 This is a schematic diagram of the connection between the bellows and the filter of a gas sampling tube of the utility model;

[0025] In the attached figure: 1. sampling head; 2. filter; 3. bellows; 4. support sleeve; 5. air guide tube; 6. locking structure; 7. pagoda joint; 21. root part; 61. locking hole; 62. locking screw. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0027] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, or it can be indirectly connected through an intermediate medium, or 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.

[0029] Figure 1 This is a schematic diagram of the structure of a gas sampling tube of the utility model. Figure 2 This is a cross-sectional view of a gas sampling tube of the utility model. Figure 3 This is a schematic diagram of the connection between the bellows and the sampling head of a gas sampling tube of the utility model. Figure 4 This is a schematic diagram of the connection between the bellows and the filter of a gas sampling tube of the utility model, as shown in FIG. Figure 1-4 As shown, a gas sampling tube of a preferred embodiment is shown, including a sampling head 1 and a filter 2, and also includes: a bellows 3, the sampling head 1 is sleeved on the outside of one end of the bellows 3, and the filter 2 is sleeved on the outside of the other end, and an air guide tube 5 is coaxially sleeved in the bellows 3, and the air guide tube 5 is connected to the sampling head 1 and the filter 2.

[0030] In this embodiment, the sampling head 1 and the filter 2 are connected by using a bellows 3, so that the sampling head 1 can be bent in all directions for detection and the position can be fixed, thereby realizing comprehensive gas detection in the place, greatly improving the safety of people in the place, and at the same time, by arranging an air guide tube 5 for connecting the sampling head 1 and the filter 2 inside the bellows 3, the gas or smell emitted by the bellows 3 itself can be prevented from affecting the accuracy of sampling.

[0031] Preferably, the air guide tube 5 is a soft tube that can be bent along with the corrugated tube 3 .

[0032] Furthermore, as a preferred embodiment, the air duct 5 and the sampling head 1 , as well as the air duct 5 and the filter 2 are connected via a pagoda connector 7 .

[0033] In order to improve the air tightness of the gas sampling circuit in this embodiment, pagoda-shaped joints are used on both sides of the air guide tube 5. After the gas is inhaled from the sampling head 1, it directly passes through the air guide tube 5 to the filter 2, ensuring the accuracy of the sampled gas concentration.

[0034] Furthermore, as a preferred embodiment, in order to prevent the bellows 3 from falling off the sampling head 1 or the filter 2 when the bellows 3 turns multiple times, a locking structure 6 is provided between the bellows 3 and the sampling head 1, and between the bellows 3 and the filter 2, which is used to lock the bellows 3 and the sampling head 1, and the filter 2.

[0035] Furthermore, as a preferred embodiment, the locking structure includes at least one locking hole 61 radially arranged on the outer wall of the sampling head 1 / the outer wall of the filter 2, and the locking hole 61 is threaded with a locking screw 62, which abuts against the outer wall of the bellows 3 to lock the bellows 3.

[0036] Furthermore, as a preferred embodiment, in order to improve the locking effect of the bellows 3, two locking holes 61 are provided on the outer wall of the sampling head 1 and the outer wall of the filter 2. The two locking holes 61 are respectively located on both sides of the sampling head 1 / filter 2, and a locking screw 62 is correspondingly threadedly installed in each locking hole 61.

[0037] Furthermore, as a preferred embodiment, a support sleeve 4 is provided on the outer sleeve of one end of the filter 2 away from the bellows 3 .

[0038] In this embodiment, in order to prevent the bottom of the filter 2 from breaking due to multiple bending of the bellows 3 or bending with force, a support sleeve 4 is provided on the outside of the end of the filter 2 away from the bellows 3 to increase the force-bearing capacity, thereby preventing the filter 2 from breaking due to excessive bending stress.

[0039] Furthermore, as a preferred embodiment, in order to further improve the force-bearing capacity of the filter 2, the support sleeve 4 is made of metal material.

[0040] Furthermore, as a preferred embodiment, the filter 2 has a root part 21 at one end close to the sampling head 1, and the other end of the bellows 3 is sleeved in the root part 21. The firmness of the root part 21 and the bellows 3 is enhanced by a clamping fixture to prevent loosening.

[0041] Furthermore, as a preferred embodiment, the bellows 3 is made of lightweight stainless steel.

[0042] A gas detector comprises a detector body and a sampling tube interface arranged on the detector body, wherein the sampling tube interface is used for connecting any of the above-mentioned gas sampling tubes.

[0043] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas sampling tube, comprising a sampling head and a filter, characterized in that: Also includes: A bellows, wherein the sampling head is sleeved on one end of the bellows, and the filter is sleeved on the other end of the bellows, and an air guide tube is coaxially sleeved inside the bellows, and the air guide tube is connected with the sampling head and the filter; Among them, the air duct and the sampling head, and the air duct and the filter are connected through a pagoda joint, and a locking structure is provided between the bellows and the sampling head, and between the bellows and the filter, for locking the bellows with the sampling head and the filter.

2. The gas sampling tube according to claim 1, characterized in that: The locking structure comprises at least one locking hole radially arranged on the outer wall of the sampling head / the outer wall of the filter, a locking screw is threadedly installed in the locking hole, and the locking screw abuts against the outer wall of the bellows to lock the bellows.

3. The gas sampling tube according to claim 2, characterized in that: Two locking holes are provided on the outer wall of the sampling head and the outer wall of the filter. The two locking holes are respectively located on both sides of the sampling head / the filter. A locking screw is threadedly installed in each locking hole.

4. The gas sampling tube according to claim 1, characterized in that: A supporting sleeve is provided on the outer sleeve of one end of the filter away from the corrugated tube.

5. The gas sampling tube according to claim 4, characterized in that: The supporting sleeve is made of metal material.

6. The gas sampling tube according to claim 1, characterized in that: The filter has a root part at one end close to the sampling head, and the other end of the bellows is sleeved in the root part.

7. The gas sampling tube according to claim 1, characterized in that: The bellows is made of lightweight stainless steel.

8. A gas detector, comprising a detector body and a sampling tube interface disposed on the detector body, characterized in that: The sampling tube interface is used to connect the gas sampling tube described in any one of claims 1 to 7.

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