CN215492264U

CN215492264U - Portable pipeline gas leakage detection device for safety evaluation

Info

Publication number: CN215492264U
Application number: CN202121329304.4U
Authority: CN
Inventors: 王飞; 朱纯; 何川; 孙国强; 张晓宇; 韩冬双; 牛彦平; 庞梦霞
Original assignee: Zhongan Guangyuan Testing And Evaluation Technology Service Co ltd
Current assignee: Zhongan Guangyuan Testing And Evaluation Technology Service Co ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2022-01-11
Anticipated expiration: 2031-06-11

Abstract

The utility model relates to a portable pipeline gas leakage detection device for safety evaluation. The device comprises a threaded pipe structure with adjustable length, wherein an angle adjusting plate is hinged to the top of the threaded pipe structure through a pin shaft, an arc-shaped groove is formed in the angle adjusting plate, and a second locking piece connected with the threaded pipe structure penetrates through the arc-shaped groove; the angle adjusting plate is detachably connected with a gas probe, the bottom of the threaded pipe structure is detachably connected with a base box, and the outside of the base box is detachably connected with a detection controller; the inner cavity of the threaded pipe structure is provided with a probe connecting wire in a penetrating way, one end of the probe connecting wire is detachably connected with the gas probe, and the other end of the probe connecting wire is detachably connected with the detection controller. The length of the utility model is adjustable, the angle of the detection end is adjustable, the detection of narrow positions is convenient, and meanwhile, a plurality of components and elements are detachably connected, so that workers can conveniently carry the detection device to enter the field for installation and detection.

Description

Portable pipeline gas leakage detection device for safety evaluation

Technical Field

The utility model belongs to the technical field of safety detection facilities, and particularly relates to a portable pipeline gas leakage detection device for safety evaluation.

Background

The safety evaluation is also called as 'danger evaluation' and 'risk evaluation', is a method and technology for ascertaining system danger and seeking safety countermeasures, is an important component of safety system engineering, and aims to master possible danger types, danger degrees and danger consequences in a system before necessary safety measures are established, and carry out quantitative and qualitative analysis on the possible danger types, danger degrees and danger consequences so as to provide effective danger control measures. Safety evaluation as an important component of modern industry is mainly divided into three categories: safety pre-evaluation, safety acceptance evaluation and safety current situation evaluation; the present safety evaluation is suitable for evaluation of a production and management unit or an industrial park, and also suitable for evaluation of a specific production method, production process, production apparatus, or operation site. In the process of evaluating the current safety situation, various safety detection devices are generally required to continuously measure and detect the production environment, so as to obtain necessary evaluation data.

In the working process of the safety status evaluation, the detection of the concentration of the toxic gas is an important link, the process is usually completed by adopting a detection controller, the detection controller is an instrument and meter tool for detecting the gas leakage concentration, the principle is that a gas sensor is used for detecting the types of the gas existing in the environment, and the gas sensor is used for detecting the components and the content of the gas. The detection controller mainly comprises a portable detection controller, a handheld detection controller, a fixed detection controller, an online detection controller and the like.

When carrying out the gas detection to gallery, pipeline, airtight space, need use hand-held type detection controller, but, be subject to the restriction of space and distance, the staff need set up support or stock and install the detection controller at the detection scene, the operation of completion gas leak hunting that just can be smooth, but in the course of the work of reality, no matter support or stock all have certain defect: the bracket occupies a large area, cannot be placed in places with narrow space, and is inconvenient to carry; although the installation detection controller on the stock can make the staff detect in the position of keeping away from the check point, the length of stock is fixed, and is equally inconvenient to carry, and inconvenient staff carries equipment to enter the field and detects, in order to solve above-mentioned problem, provides a solution now.

SUMMERY OF THE UTILITY MODEL

The utility model provides a portable pipeline gas leakage detection device for safety evaluation, which is reasonable in structural design and convenient to carry, and aims to solve the technical problems in the prior art.

The technical scheme adopted by the utility model for solving the technical problems in the prior art is as follows: a portable pipeline gas leakage detection device for safety evaluation comprises a threaded pipe structure with adjustable length, wherein an angle adjusting plate is hinged to the top of the threaded pipe structure through a pin shaft, an arc-shaped groove is formed in the angle adjusting plate, and a second locking piece connected with the threaded pipe structure penetrates through the arc-shaped groove; the angle adjusting plate is detachably connected with a gas probe, the bottom of the threaded pipe structure is detachably connected with a base box, and the outside of the base box is detachably connected with a detection controller; the inner cavity of the threaded pipe structure is provided with a probe connecting wire in a penetrating way, one end of the probe connecting wire is detachably connected with the gas probe, and the other end of the probe connecting wire is detachably connected with the detection controller.

The utility model has the advantages and positive effects that: the utility model provides a portable pipeline gas leakage detection device for safety evaluation, which can perform online leakage detection operation on a detection point by arranging a gas probe, a detection controller and a probe connecting wire for electrically connecting the gas probe and the detection controller; the gas probe is installed by arranging the length-adjustable threaded pipe structure instead of a long rod, so that a worker can perform leak detection operation without approaching a detection point, further harm of harmful gas to the operator is reduced, and compared with the long rod, the length-adjustable threaded pipe structure is more convenient to carry; the base box is connected with the threaded pipe structure, so that a support with a large occupied area is replaced, automatic detection can be performed on a detection point in a narrow space, a worker does not need to hold the threaded pipe structure, and the base box is also suitable for detecting a closed space; by arranging the angle adjusting plate, the angle of the adjusting gas probe can be adjusted, and a worker can conveniently perform leak detection operation on a detection point in a narrow position; because the components and the elements are detachably connected, the detection device is convenient for workers to carry to enter the field for installation and detection, and the portability is high.

Preferably: a connecting stub is electrically connected between the base box and the detection controller, a first wiring terminal is connected to each end of the connecting stub, a second wiring terminal is connected to each end of the probe connecting wire, and a plug-in terminal which is in plug-in fit with the wiring terminals and realizes electrical connection is arranged on the base box; a window is arranged on the side surface of the base box, and a hinged door is arranged at the window.

Preferably: the screwed pipe structure includes the outer joint pipe that can dismantle the connection with the base case, the cover is equipped with the third screwed pipe from interior to exterior in proper order in the inner chamber of outer joint pipe, second screwed pipe and first screwed pipe, be connected with the first screw thread subassembly with first screwed pipe threaded connection at the top of outer joint pipe, be connected with the second screw thread subassembly with second screwed pipe threaded connection at the top of first screwed pipe, be connected with the third screw thread subassembly with third screwed pipe threaded connection at the top of second screwed pipe.

Preferably: the first threaded component comprises a first threaded sleeve provided with internal threads, a first locking sleeve is sleeved on the first threaded sleeve, and the first locking sleeve and the first threaded sleeve can rotate relatively; the outer peripheral wall of the first locking sleeve is integrally formed with a connecting lug, a threaded hole is formed in the connecting lug, a locking screw penetrates through the threaded hole, and the first locking sleeve and the first threaded sleeve can be connected/released in a locking mode through the locking screw.

Preferably: the first threaded assembly, the second threaded assembly and the third threaded assembly are structurally identical.

Preferably: a threaded sleeve in the first threaded component is in threaded connection with the first threaded pipe and is rotationally connected with the outer connecting pipe through a copper sleeve, and a locking sleeve in the first threaded component is fixedly connected with the outer connecting pipe; a threaded sleeve in the second threaded component is in threaded connection with a second threaded pipe and is rotationally connected with the first threaded pipe through a copper sleeve, and a locking sleeve in the second threaded component is fixedly connected with the first threaded pipe; and a threaded sleeve in the third threaded component is in threaded connection with a third threaded pipe and is rotationally connected with a second threaded pipe through a copper sleeve, and a locking sleeve in the third threaded component is fixedly connected with the second threaded pipe.

Preferably: the angle adjusting plates are arranged in two groups, the two groups of angle adjusting plates are symmetrically arranged about the third threaded pipe and are hinged with the end part of the third threaded pipe through a pin shaft, the top parts of the two groups of angle adjusting plates are fixedly connected with mounting plates which connect the two groups of angle adjusting plates into a whole, and the gas probe is connected to the mounting plates through saddle-shaped pieces.

Preferably: the top of the base box is fixedly connected with a section bar, the bottom of the outer connecting pipe is integrally formed with a flange plate, and a first locking piece used for locking and connecting or releasing the section bar and the flange plate is arranged between the section bar and the flange plate.

Preferably: the tool box comprises a lower shell and an upper cover body which are mutually hinged through a hinge, and a first accommodating cavity, a second accommodating cavity, a third accommodating cavity and a fourth accommodating cavity are separated from the inner cavity of the lower shell through a plurality of groups of partition plates; a snap lock for locking and releasing the lower shell and the upper cover is arranged between the lower shell and the upper cover.

Drawings

FIG. 1 is a front view partially in section structural schematic of the present invention;

FIG. 2 is an enlarged schematic view of region A of FIG. 1;

FIG. 3 is a perspective view illustrating an assembled state of an angle adjusting plate according to the present invention;

fig. 4 is a perspective view of the tool box of the present invention.

In the figure: 1. a base case; 2. a hinged door; 3. a first locking member; 4. a detection controller; 5. connecting short lines; 6. a first connection terminal; 7. an outer connecting pipe; 8. a first threaded pipe; 9. a second threaded pipe; 10. a third threaded pipe; 11. a first threaded component; 11-1, a first locking sleeve; 11-2, a first threaded sleeve; 12. a second threaded component; 13. a third threaded assembly; 14. a second locking member; 15. a probe connecting wire; 16. mounting a plate; 17. a second connection terminal; 18. a gas probe; 19. an angle adjusting plate; 20. a tool box; 20-1, lower shell; 20-2, an upper cover body; 20-3, a first accommodating cavity; 20-4, a second accommodating cavity; 20-5, a third accommodating cavity; 20-6 and a fourth accommodating cavity.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are described in detail as follows:

referring to fig. 1, the portable pipeline gas leakage detection device for safety evaluation of the present invention includes a length-adjustable threaded pipe structure, in this embodiment, the threaded pipe structure includes an outer connecting pipe 7, and a third threaded pipe 10, a second threaded pipe 9, and a first threaded pipe 8 are sequentially sleeved from inside to outside in an inner cavity of the outer connecting pipe 7; a first screw assembly 11 screwed to the first threaded pipe 8 is connected to the top of the outer joint pipe 7, a second screw assembly 12 screwed to the second threaded pipe 9 is connected to the top of the first threaded pipe 8, and a third screw assembly 13 screwed to the third threaded pipe 10 is connected to the top of the second threaded pipe 9.

In the present embodiment, the rotation directions of the male screws formed in the outer peripheral walls of the third threaded pipe 10, the second threaded pipe 9, and the first threaded pipe 8 are the same. In actual working process, staff's accessible manual forward rotation or reverse rotation screw thread subassembly, and then the drive with foretell screw thread subassembly threaded connection's screwed pipe stretch out and draw back, finally realize the purpose of adjusting the whole length of screwed pipe structure, it is worth noting that, in this embodiment, when manual rotation screw thread subassembly, the pipe fitting of being connected with it keeps circumference fixed.

With further reference to fig. 2, in the present embodiment, the first threaded component 11 includes a first threaded sleeve 11-2 having an internal thread, the first threaded sleeve 11-2 is threadedly coupled to the first threaded pipe 8, and the first threaded sleeve 11-2 is rotatably coupled to the outer connecting pipe 7 via a copper sleeve. The first threaded sleeve 11-2 is sleeved with a first locking sleeve 11-1, the first locking sleeve 11-1 and the first threaded sleeve 11-2 can rotate relatively, and in addition, the first locking sleeve 11-1 is fixedly connected with the outer connecting pipe 7, specifically: the inner circumferential surface of the outer connecting pipe 7 is provided with a circle of convex rings which are tightly propped against the stepped part at the upper end part of the outer connecting pipe 7, and the first locking sleeve 11-1 can be fixedly connected with the outer connecting pipe 7 through screws. The outer peripheral wall of the first locking sleeve 11-1 is integrally formed with a connecting lug, a threaded hole is formed in the connecting lug, a locking screw penetrates through the threaded hole, and the first locking sleeve 11-1 and the first threaded sleeve 11-2 can be locked and connected/released by the locking screw.

In this embodiment, the first threaded component 11, the second threaded component 12, and the third threaded component 13 have the same structure, specifically: a thread sleeve in the second thread component 12 is in threaded connection with the second threaded pipe 9 and is rotationally connected with the first threaded pipe 8 through a copper sleeve, and a locking sleeve in the second thread component 12 is fixedly connected with the first threaded pipe 8; the thread sleeve in the third thread component 13 is in threaded connection with the third threaded pipe 10 and is rotationally connected with the second threaded pipe 9 through a copper sleeve, and the locking sleeve in the third thread component 13 is fixedly connected with the second threaded pipe 9.

As shown in fig. 1, a base box 1 is detachably connected to the bottom of the threaded pipe structure, specifically: the top of the base box 1 is fixedly connected with a section bar, the bottom of the outer connecting pipe 7 is integrally formed with a flange plate, and a first locking piece 3 for locking and connecting or releasing the section bar and the flange plate is arranged between the section bar and the flange plate. First retaining member 3 can adopt bolt and lock nut, also can adopt quick detach structure, and for the convenience of operation, in this embodiment, first retaining member 3 adopts quick detach structure, and quick detach structure's pulling rod is worn to locate in the notch of section bar and the open slot of flange dish. In actual working process, base case 1 can play the effect of supporting stable screwed pipe structure, place detection device in specific position after making things convenient for the staff to adjust the length of screwed pipe structure and detect, need not that the staff holds the screwed pipe structure and detects, it is worth noting, because some detection environment space are smaller, base case 1's volume in this embodiment can not be too big, can realize with outer connecting pipe 7 the locking connection can, it is worth noting, in order to avoid taking place the phenomenon of empting behind the screwed pipe structure overlength, this embodiment is provided with the balancing weight at base case 1's inner chamber.

In order to facilitate adjustment of the angle of the gas probe 18 mentioned later, as shown in fig. 1 and 3, an angle adjustment plate 19 is hinged to the top of the threaded pipe structure by a pin shaft in the present embodiment. In this embodiment, two sets of angle adjusting plates 19 are provided, the two sets of angle adjusting plates 19 are symmetrically disposed about the third threaded pipe 10 and hinged to the end of the third threaded pipe 10 through a pin, an arc-shaped groove is formed in each angle adjusting plate 19, and a second locking member 14 connected to the threaded pipe structure is inserted into the arc-shaped groove. The second locking member 14 can be quick release. In the arc wall of seting up on angle adjustment plate 19 was worn to locate after the pulling pole of rapid disassembly structure runs through the upper portion of third screwed pipe 10, second retaining member 14 also can adopt the bolt that runs through the upper portion of third screwed pipe 10 in addition, the bolt wear to establish with angle adjustment plate 19 on the arc wall of seting up in, the both ends spiral shell of bolt has lock nut, for the convenience of operation, the first quick disassembly structure of selecting of second retaining member 14 in this embodiment.

As shown in fig. 1, the top rigid coupling of two sets of angle adjusting plates 19 has the mounting panel 16 of linking the two as an organic whole, can dismantle through the saddle piece and be connected with gas probe 18 on mounting panel 16, in this embodiment, gas probe 18 includes outside casing, be provided with the miniature pump body that is used for drawing gas in the casing, a gas sensor for carrying out kind detection and concentration detection to the gas of extraction, air inlet and gas outlet have been seted up on the casing, be connected with the breathing pipe on the air inlet, still be connected with on the casing with binding post grafting cooperation and realize the grafting terminal of electricity connection.

In the actual working process, after the locking connection between the angle adjusting plate 19 and the third threaded pipe 10 is released by using the second locking member 14, the angle adjusting plate 19 is manually adjusted to rotate the angle of the adjustable gas probe 18 around the hinge pin shaft, so that the gas probe 18 can conveniently perform leak detection on a detection point at a narrow position in space, and the detection work can be performed smoothly.

As shown in fig. 1, the detection controller 4 is detachably connected to the outside of the base box 1, in this embodiment, a hook is connected to the back of the detection controller 4, a plug connector with a slot is connected to the side wall of the collection box 1, and the hook is detachably connected to the plug connector. In order to electrically connect the gas probe 18 and the detection controller 4, the present embodiment further includes a probe connection line 15 penetrating through the inner cavity of the threaded pipe structure, wherein one end of the probe connection line 15 penetrates through a notch formed in the upper end of the third threaded pipe 10 and then is detachably connected to the gas probe 18, and the other end of the probe connection line penetrates through a notch formed in the base box 1 and then is detachably connected to the detection controller 4. The length of the probe connecting line 15 is adapted to the maximum length of the threaded tubular structure.

In addition, in order to facilitate the detachment and the installation, the present embodiment further includes a connection stub 5 electrically connected between the base case 1 and the inspection controller 4. Furthermore, both ends of the connecting stub 5 are connected with first wiring terminals 6, both ends of the probe connecting wire 15 are connected with second wiring terminals 17, and the base box 1 is provided with a plug-in terminal which is in plug-in fit with the wiring terminals and realizes electric connection.

In the actual working process, one second wiring terminal 17 on the probe connecting wire 15 is plugged with a plugging terminal on the shell of the gas probe 18 to realize electric connection, and the other second wiring terminal 17 is plugged with a plugging terminal on the base box 1 to realize electric connection; one first wiring terminal 6 of the connection stub 5 is plugged with a plugging terminal on the detection controller 4 to realize electric connection, and the other first wiring terminal 6 is plugged with a plugging terminal on the base box 1 to realize electric connection. Referring to fig. 1 further, in order to facilitate the work of the worker, in this embodiment, a window is formed in a side surface of the base box 1, the hinged door 2 is disposed at the window, and after the hinged door 2 is opened, a hand extends into the inner cavity of the base box 1 to plug a second connection terminal 17 on the probe connection line 15 into the plug terminal on the base box 1.

The gas probe 18 sucks the gas at the detection point, detects the gas by using the sensor, and then feeds back the detected information to the detection controller 4, wherein the detected information comprises the component types and the corresponding concentrations in the gas, and a worker can judge whether the leakage phenomenon occurs at the detection point according to the concentration of the gas.

As shown in fig. 4, in order to facilitate the tidying and carrying of the detection device, the present embodiment further includes a tool box 20, the tool box 20 includes a lower case 20-1 and an upper cover 20-2 hinged to each other by a hinge, and a snap lock for locking/releasing the lower case 20-1 and the upper cover 20-2 is disposed between the two cases. The inner cavity of the lower shell 20-1 is divided into a first accommodating cavity 20-3, a second accommodating cavity 20-4, a third accommodating cavity 20-5 and a fourth accommodating cavity 20-6 by a plurality of groups of partition plates. The second accommodating cavity 20-4 is used for accommodating a threaded pipe structure and an angle adjusting plate 19, the first accommodating cavity 20-3 is used for accommodating the base box 1, and the third accommodating cavity 20-5 and the fourth accommodating cavity 20-6 can be respectively used for accommodating the gas probe 18 and the detection controller 4; in addition, in order to avoid collision of each component in the transportation process, a shock absorption foam block (not shown) is further arranged in each accommodating cavity, and a notch matched with the external contour of each element is formed in the shock absorption foam block. For carrying convenience, a handle is arranged on the lower shell 20-1.

In this embodiment, the detection controller 4 may be electrically connected to a power supply, or may be powered by a battery, and the detection controller 4 has a storage function and a reading function.

The working process is as follows:

the personnel enter the field with the tool box 20, remove the components and elements and assemble the components and elements according to the position of the detection points.

When the space that the check point was in belonged to the encapsulated situation, the staff can be connected threaded tube structure and base case 1 locking, then place base case 1 and detect in the confined space, specifically do: the threaded pipe structure and the base box 1 are in locking connection by using a first locking piece 3, the gas probe 18 is installed on the installation plate 16 by using a saddle piece, a bolt and a nut, and the detection controller 4 is hung on the base box 1; a second connecting terminal 17 on the probe connecting wire 15 is plugged on the gas probe 18, the hinged door 2 on the base box 1 is opened, the other second connecting terminal 17 on the probe connecting wire 15 is plugged on a plugging terminal on the base box 1, and two first connecting terminals 6 on the connecting short wire 5 are respectively in differential connection with the plugging terminal on the base box 1 and the detection controller 4; observe the position of the check point in the enclosure space, then adjust the angle of gas probe 18 and the length of screwed pipe structure (adjustment process as before, no longer repeated here) according to the result of observation, start detection controller 4, the staff can leave the enclosed space, detection device can detect the check point by oneself, gas probe 18 absorbs the gas of check point department and utilizes the sensor to detect gas promptly, then feed back the information that detects to detection controller 4, detection controller 4 carries out analysis and storage with the information received, make things convenient for staff's later stage to transfer the record, in actual working process, detection controller 4 can carry out multiple operation, the interval time between two detections can be set for by the staff.

When the check point is in higher position or the staff can not be closely when approaching the check point, the staff can hand the screwed pipe structure and detect, specifically be: the installation, angle accommodation process and the length adjustment process of each component and subassembly are unanimous basically with before, and the difference lies in need not to utilize first retaining member 3 to lock threaded tube structure and base case 1 and is connected, and the staff only need handheld threaded tube structure alright open detection controller 4, and then accomplish the leak hunting operation to the check point under the condition of not being close to the check point, and operation process is very convenient.

After the detection is finished and the detection result is recorded, the connection between each component and each element is released, the threaded pipe structure is adjusted to the initial length, each element and each component are placed in the corresponding accommodating cavity in the tool box 20, and the lower shell 20-1 and the upper cover body 20-2 are locked, so that the whole process of the on-site detection and the delivery is finished.

The gas probe 18 is installed by using the length-adjustable threaded pipe structure to replace a long rod, so that a worker can perform leak detection operation without approaching a detection point, and compared with the long rod, the length-adjustable threaded pipe structure is more convenient to carry; through setting up base case 1 and being connected with the screwed pipe structure, replaced the great support of area, can carry out automatic detection to the check point that is in narrow and small space through this kind of setting, need not the handheld screwed pipe structure of staff, be applicable to and detect airtight space. As the components and elements in the embodiment are detachably connected and the tool box 20 is arranged, the detection device is convenient for workers to carry to enter a field for installation and detection.

Claims

1. The utility model provides a portable for safety evaluation pipeline gas leak hunting device which characterized by: the device comprises a threaded pipe structure with adjustable length, wherein an angle adjusting plate (19) is hinged to the top of the threaded pipe structure through a pin shaft, an arc-shaped groove is formed in the angle adjusting plate (19), and a second locking piece (14) connected with the threaded pipe structure penetrates through the arc-shaped groove; the angle adjusting plate (19) is detachably connected with a gas probe (18), the bottom of the threaded pipe structure is detachably connected with a base box (1), and the outside of the base box (1) is detachably connected with a detection controller (4); a probe connecting line (15) penetrates through the inner cavity of the threaded pipe structure, one end of the probe connecting line (15) is detachably connected with the gas probe (18), and the other end of the probe connecting line is detachably connected with the detection controller (4).

2. The portable pipe gas leak detection apparatus for safety evaluation as set forth in claim 1, wherein: a connecting stub (5) is electrically connected between the base box (1) and the detection controller (4), two ends of the connecting stub (5) are connected with first wiring terminals (6), two ends of the probe connecting wire (15) are connected with second wiring terminals (17), and the base box (1) is provided with a plug-in terminal which is in plug-in fit with the wiring terminals and realizes electrical connection; a window is arranged on the side surface of the base box (1) and a hinged door (2) is arranged at the window.

3. The portable pipe gas leak detection apparatus for safety evaluation as set forth in claim 1, wherein: the screwed pipe structure includes outer connecting pipe (7) of being connected of dismantling with base case (1), the cover is equipped with third screwed pipe (10) from inside to outside in proper order in the inner chamber of outer connecting pipe (7), second screwed pipe (9) and first screwed pipe (8), be connected with first screw assembly (11) with first screwed pipe (8) threaded connection at the top of outer connecting pipe (7), be connected with second screw assembly (12) with second screwed pipe (9) threaded connection at the top of first screwed pipe (8), be connected with third screw assembly (13) with third screwed pipe (10) threaded connection at the top of second screwed pipe (9).

4. The portable piping gas leak detection apparatus for safety evaluation as set forth in claim 3, wherein: the first threaded component (11) comprises a first threaded sleeve (11-2) provided with internal threads, a first locking sleeve (11-1) is sleeved on the first threaded sleeve (11-2), and the first locking sleeve (11-1) and the first threaded sleeve (11-2) can relatively rotate; the outer peripheral wall of the first locking sleeve (11-1) is integrally formed with a connecting lug, a threaded hole is formed in the connecting lug, a locking screw penetrates through the threaded hole, and the first locking sleeve (11-1) and the first threaded sleeve (11-2) can be locked and connected/released by the locking screw.

5. The portable piping gas leak detection apparatus for safety evaluation as set forth in claim 4, wherein: the first threaded assembly (11), the second threaded assembly (12) and the third threaded assembly (13) are structurally identical.

6. The portable piping gas leak detection apparatus for safety evaluation as set forth in claim 5, wherein: a thread sleeve in the first thread component (11) is in threaded connection with the first threaded pipe (8) and is rotationally connected with the outer connecting pipe (7) through a copper sleeve, and a locking sleeve in the first thread component (11) is fixedly connected with the outer connecting pipe (7); a thread sleeve in the second thread component (12) is in threaded connection with the second threaded pipe (9) and is rotationally connected with the first threaded pipe (8) through a copper sleeve, and a locking sleeve in the second thread component (12) is fixedly connected with the first threaded pipe (8); a thread sleeve in the third thread component (13) is in threaded connection with the third threaded pipe (10) and is rotationally connected with the second threaded pipe (9) through a copper sleeve, and a locking sleeve in the third thread component (13) is fixedly connected with the second threaded pipe (9).

7. The portable pipe gas leak detection apparatus for safety evaluation as set forth in claim 1, wherein: two groups of angle adjusting plates (19) are arranged, the two groups of angle adjusting plates (19) are symmetrically arranged about the third threaded pipe (10) and are hinged with the end part of the third threaded pipe (10) through a pin shaft, mounting plates (16) which connect the two groups of angle adjusting plates into a whole are fixedly connected to the tops of the two groups of angle adjusting plates (19), and the gas probe (18) is connected to the mounting plates (16) through saddle-shaped members.

8. The portable piping gas leak detection apparatus for safety evaluation as set forth in claim 3, wherein: the top of the base box (1) is fixedly connected with a section bar, the bottom of the outer connecting pipe (7) is integrally formed with a flange plate, and a first locking piece (3) used for locking and connecting or releasing the section bar and the flange plate is arranged between the section bar and the flange plate.

9. A portable piping gas leak detection apparatus for safety evaluation as defined in any one of claims 1 to 8, wherein: the tool box comprises a lower shell (20-1) and an upper cover body (20-2) which are mutually hinged through a hinge, and an inner cavity of the lower shell (20-1) is divided into a first accommodating cavity (20-3), a second accommodating cavity (20-4), a third accommodating cavity (20-5) and a fourth accommodating cavity (20-6) through a plurality of groups of partition plates; a snap lock for locking/releasing the lower case (20-1) and the upper cover (20-2) is provided between the two.