Combustible gas detection device

Abstract

The utility model belongs to the technical field of gas leakage detection, particularly relates to a combustible gas detection device, and provides the following scheme aiming at the problems of low detection efficiency, poor accuracy and short probe service life of the existing detection device under complex working conditions: the combustible gas detection device comprises a detector, a gooseneck pipe, a detection cylinder assembly and a built-in snake bone bending assembly. According to the utility model, the gooseneck manual coarse positioning assembly and the snake bone bending assembly are subjected to fine angle adjustment through the two groups of orthogonally arranged regulation and control units, so that the accurate pointing of the tail end of the probe is realized. The detection cylinder assembly is provided with a movable inner cylinder and a separation blade linked with the inner cylinder, and the probe is fixed in the inner cylinder; when the inner cylinder is contracted, the separation blade is folded to protect the probe; and when the inner cylinder extends out, the baffle plate expands outwards to form a flow guide cover so as to actively gather gas and enhance sampling. The regulation and control unit drives the rope winding rod through a worm and gear mechanism to control winding and unwinding of a pull rope in the snake bone assembly, the structure is stable, and the self-locking function is achieved. And the reliability of combustible gas detection in a complex environment is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a detection device, concretely to a combustible gas detection device belongs to gas leakage detection technical field. BACKGROUND

[0002] In the fields of petroleum, chemical industry, gas transmission and distribution and emergency rescue, it is a crucial safety operation to detect combustible gas leakage in the internal or hidden parts of complex structures such as pipe interfaces, valves and equipment cabins.

[0003] In the prior art, in order to extend the detection probe into a space that is difficult to directly reach, an extension rod or a flexible pipe is usually used. For example, a gas leakage rapid detection device disclosed in announcement No. CN221402749U uses a bendable serpentine pipe to connect the detector and the probe. Another example is a natural gas leakage detection device using a gas suction gooseneck pipe disclosed in announcement No. CN221301040U. These solutions improve the accessibility of the probe to a certain extent. However, there are two key defects in the prior art: first, such serpentine pipes or gooseneck pipes can usually only rely on manual bending by the operator to achieve rough positioning, and cannot fine-tune the angle of the probe tip after being inserted. This results in difficulties in accurately aligning the suspected leakage point when facing deep holes, bent pipes or specific gaps, and detection has blind spots. Second, the protection and sampling of the probe are passive and inefficient. Most probes are directly exposed or have a simple fixed protective net installed externally, which is easily contaminated or damaged when passing through an oil-stained or dusty environment. The sampling completely relies on the natural diffusion of gas, and in the case of air stillness or weak leakage source, the response speed is slow, the sensitivity is low, and early leakage signals are easily missed. In summary, the prior art lacks a detection device that integrates large-range rapid arrival, three-dimensional accurate orientation of the tip, active protection of the probe and enhanced sampling, resulting in low detection efficiency, poor accuracy and short probe life in complex working conditions. SUMMARY

[0004] The utility model discloses a combustible gas detection device to solve the problem of low detection efficiency, poor accuracy and short probe life of the prior art detection device in complex working conditions.

[0005] The utility model discloses a combustible gas detection device, including the detector, the front end of detector is connected with the gooseneck pipe, the front end of gooseneck pipe is connected with detection cylinder subassembly, the front end pipe body of gooseneck pipe is covered with the serpentine bending component, the detection probe is movably arranged in detection cylinder subassembly, the detection probe is signal connected with detector, and the connecting part of detector and gooseneck pipe is equipped with two groups of control unit that links and grounds with serpentine bending component, and the control path of two groups of control unit is perpendicular.

[0006] The detection cylinder assembly comprises a fixed outer cylinder and a movable inner cylinder sleeved in the outer cylinder, the open end of the fixed outer cylinder is connected with a baffle, a detection probe is fixedly connected in the movable inner cylinder, the baffle is in a folded state when the movable inner cylinder is in a retracted position, and the baffle is in an expanded state when the movable inner cylinder is in an extended position.

[0007] The snake bone bending assembly comprises four pull ropes and a plurality of cylindrical snake bones connected in sequence, and the control unit comprises a winding rod, one end of each of the pull ropes is connected to the inner wall of the cylindrical snake bone, the other end of each of two oppositely arranged pull ropes is wound on the rod body of the winding rod, and the winding directions of the two pull ropes on the rod body of the winding rod are opposite.

[0008] As a further scheme of the present application, the tail plate is fixedly connected in the fixed outer cylinder, the electric push rod is fixedly connected to the tail plate, and the movable front end of the electric push rod is fixedly connected to the movable inner cylinder.

[0009] As a further scheme of the present application, the baffle is annular and uniformly provided with a plurality of baffle plates, each baffle plate is connected with the open end of the fixed outer cylinder through an elastic rubber strip, and the inner side of each baffle plate is provided with a limiting sliding groove, the open end of the movable inner cylinder is connected with an expanding cover, and the front end of the expanding cover is clamped in the limiting sliding groove.

[0010] As a further scheme of the present application, the front end of the expanding cover is provided with an arc-shaped edge, and a dustproof net is fixedly connected in the cover of the expanding cover.

[0011] As a further scheme of the present application, the front end of the detection instrument is connected with a control pipe, the two control units are vertically and staggeredly arranged on the control pipe, the control unit further comprises a control rotating rod, the control rotating rod is arranged in linkage with the winding rod, the control rotating rod is movably penetrated through one side wall of the control pipe, and a damping rubber sleeve is sleeved on the rod body part of the control rotating rod penetrated through the wall of the control pipe.

[0012] As a further scheme of the present application, the two end cylindrical snake bones are fixedly connected with positioning rings, the positioning rings are fixedly connected with the inner wall of the gooseneck pipe, the pull ropes are movably sleeved with sleeve pipes on the rope body between the cylindrical snake bones and the control unit, the front end of the sleeve pipe is fixedly connected with the gooseneck pipe, and the tail end of the sleeve pipe is fixedly connected with the control pipe.

[0013] As a further scheme of the present application, the snake bone bending assembly further comprises a front end limiting ring and a tail end limiting ring, the front ends of the four pull ropes are fixedly sleeved on the ring body of the front end limiting ring in a mutually perpendicular manner, the front end limiting ring is fixedly connected with the inner wall of the gooseneck pipe, the tail ends of the four pull ropes are fixedly sleeved on the tail end limiting ring in a mutually perpendicular manner, and the tail end limiting ring is fixedly connected with the inner wall of the control pipe.

[0014] As a further scheme of the utility model: the regulating unit further comprises a worm gear and a worm, the worm gear is coaxially fixedly connected in the middle part of the rod body of the winding rod, the two ends of the winding rod are rotatably connected on the inner wall of the regulating pipe, the two ropes are respectively wound on the winding rods on the two sides of the worm gear, the worm is coaxially fixedly connected with the regulating rotating rod, and the worm is meshedly connected with the worm gear.

[0015] The utility model discloses the beneficial effects are:

[0016] 1, the utility model discloses setting has detection appearance, goose neck pipe, detection cylinder subassembly and snake bone bending subassembly, and the connecting part of detection appearance and goose neck pipe is equipped with two groups of the regulation and control unit that links with snake bone bending subassembly, and the regulation and control path of two groups of regulation and control units is perpendicular, and goose neck pipe is as the support main body that can be manually shaped at will, so that the operator can quickly send the device into complex space in a large range, the built-in snake bone bending subassembly can then carry out the slight adjustment of the orientation of the foremost detection cylinder subassembly, and secondly, two groups of regulation and control units are arranged, and the regulation and control path is perpendicular, and directly correspond two basic degrees of freedom in space, by the control of the two groups of independent regulation and control units, the snake bone bending subassembly can be controlled in two mutually perpendicular planes and be curved respectively, thereby synthesizing the deflection of arbitrary direction, so that the detection probe can be aimed at specific gap, hole and other difficult-to-directly-touch suspected leakage points, and the directivity and dead angle coverage ability of detection are improved.

[0017] 2, the detection cylinder subassembly of the utility model includes fixed outer tube and the movable inner tube of setting in its cylinder, and the opening end of fixed outer tube is connected with the baffle, and the detection probe is fixedly connected in the movable inner tube, and the baffle is in the folding state when the movable inner tube is in the retracted position, and the baffle is in the outward expansion state when the movable inner tube is in the extended position, when the movable inner tube is in the retracted position, the baffle is in the folding state under the elastic constraint, and can provide a sealed space for the internal detection probe, can effectively prevent dust, oil stains, condensed water or foreign matter from directly contacting the detection probe when the device passes through the environment of dirt, damp or mechanical collision risk, when needing detection, drive the movable inner tube to extend, this action will force the baffle to expand outward, and form a horn-shaped flow guide cover, and the outwardly expanded baffle can better approach the surface of the area to be measured, such as the pipeline wall, valve interface, and reduce the interference of environmental airflow, and the formed flow guide structure can actively converge and guide the gas flow of the target area to the detection probe, change passive diffusion sampling into active enhanced sampling, and improve the monitoring efficiency.

[0018] 3. The utility model discloses a snake bone bending assembly which is provided with four pull ropes and a plurality of cylindrical snake bones connected in sequence, and a control unit which comprises a winding rod, one end of the pull rope is connected to the inner wall of the cylindrical snake bone, the other end of the two oppositely arranged pull ropes is wound on the rod of the winding rod, and the winding directions of the two pull ropes on the rod of the winding rod are opposite, the layout of the four pull ropes forms two vertical control planes, so that the snake bone bending assembly can bend in all directions, and the front detection probe can be accurately pointed to any direction, and the two oppositely arranged pull ropes are wound on the same winding rod in opposite directions, so that when the winding rod is rotated, one pull rope can be forced to be tightened and the pull rope on the opposite side can be forced to be loosened synchronously. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole structure schematic view of the utility model;

[0020] Figure 2 It is a cross section structure schematic view of the detection cylinder assembly when the movable inner cylinder is retracted;

[0021] Figure 3 It is a cross section structure schematic view of the detection cylinder assembly when the movable inner cylinder is extended;

[0022] Figure 4 It is a cross section structure schematic view of the movable inner cylinder and the flared cover;

[0023] Figure 5 It is a structure schematic view of the inner side of the baffle;

[0024] Figure 6 It is a structure schematic view of the snake bone bending assembly;

[0025] Figure 7 It is a connection structure schematic view of the control unit and the control pipe;

[0026] Figure 8 It is a structure schematic view of the control unit in the control pipe.

[0027] In the drawing: 1, detector; 2, gooseneck pipe; 3, detection cylinder assembly; 31, fixed outer cylinder; 32, baffle; 33, tail plate; 34, electric push rod; 35, movable inner cylinder; 36, detection probe; 37, flared cover; 38, arc-shaped edge; 39, elastic rubber strip; 310, limiting sliding groove; 311, dustproof net; 4, control pipe; 5, snake bone bending assembly; 51, cylindrical snake bone; 52, positioning ring; 53, front end limiting ring; 54, pull rope; 55, sleeve; 56, tail end limiting ring; 57, control rotating rod; 58, damping rubber sleeve; 59, winding rod; 510, worm wheel; 511, worm. DETAILED DESCRIPTION

[0028] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0029] Embodiment one

[0030] As Figures 1 to 8 shown, a combustible gas detection device includes a detector 1, the front end of the detector 1 is connected with a gooseneck pipe 2, the front end of the gooseneck pipe 2 is connected with a detection cylinder assembly 3, a snake bone bending assembly 5 is sleeved in the front end pipe body of the gooseneck pipe 2, a detection probe 36 is movably arranged in the detection cylinder assembly 3, the detection probe 36 is signal connected with the detector 1, two groups of control units which are linked with the snake bone bending assembly 5 are arranged at the connection part of the detector 1 and the gooseneck pipe 2, the control paths of the two groups of control units are perpendicular, the detector 1 and the detection probe 36 can adopt the shell and the gas sensor involved in the gas leakage detector disclosed in the publication number CN208568172U, the shell includes an upper cover and a lower cover, the upper cover and the lower cover are connected and surround a cavity, a lithium battery and a PCB board are arranged in the cavity; a gas sensor is arranged outside the shell; the lithium battery and the gas sensor are electrically connected with the PCB board, the electrical connection is an electrical signal connection, which ensures that the parameter signal detected by the gas sensor is transmitted to the PCB board, the gooseneck pipe 2 serves as a manually shaped support main body, so that the operator can quickly send the device into a complex space in a large range; the built-in snake bone bending assembly 5 can slightly adjust the orientation of the frontmost detection cylinder assembly 3, secondly, two groups of control units are arranged and the control paths thereof are perpendicular, which directly correspond to two basic degrees of freedom in the space, by controlling the two groups of independent control units, the snake bone bending assembly 5 can be controlled to bend in two mutually perpendicular planes, so as to synthesize a deflection in any direction, so that the detection probe 36 can be aligned with a specific gap, hole and other suspected leakage points which are difficult to directly touch, and the directivity and dead angle coverage capability of detection are improved.

[0031] The detection cylinder assembly 3 comprises a fixed outer cylinder 31 and a movable inner cylinder 35 sleeved in the cylinder of the fixed outer cylinder 31, the opening end of the fixed outer cylinder 31 is connected with a baffle 32, a detection probe 36 is fixedly connected in the movable inner cylinder 35, the baffle 32 is in a folded state when the movable inner cylinder 35 is in a retracted position, the baffle 32 is in an expanded state when the movable inner cylinder 35 is in an extended position, when the movable inner cylinder 35 is in the retracted position, the baffle 32 is in a folded state under the elastic constraint, which can provide a closed space for the internal detection probe 36, and can effectively prevent dust, oil stains, condensed water or foreign matters from directly contacting the detection probe 36 when the device passes through a dirty, humid or mechanically-collided environment, when detection is needed, the movable inner cylinder 35 is driven to extend, which will force the baffle 32 to expand outward to form a horn-shaped flow guide cover, the expanded baffle 32 can better adhere to the surface of the to-be-detected area such as the pipe wall or the valve interface, and the interference of the environmental airflow is reduced; and the formed flow guide structure can actively converge and guide the gas flow of the target area to the detection probe 36, changing passive diffusion sampling to active enhanced sampling, and improving the monitoring efficiency.

[0032] The snake bone bending assembly 5 comprises four pull ropes 54 and a plurality of cylindrical snake bones 51 connected in sequence, and the control unit comprises a winding rod 59, one end of each of the pull ropes 54 is connected to the inner wall of the cylindrical snake bone 51, the other end of each of two oppositely arranged pull ropes 54 is wound on the rod body of the winding rod 59, and the winding directions of the two pull ropes 54 on the rod body of the winding rod 59 are opposite. It should be noted that the connection relationship between the pull rope 54 of the snake bone bending assembly 5 and the cylindrical snake bone 51 can adopt the traction rope passing through each snake bone unit and fixedly connected to the frontmost snake bone unit as disclosed in the snake bone assembly with the publication number CN219229813U, and thus it is not necessary to repeat it in this application. The layout of the four pull ropes 54 constitutes two vertical control planes, so that the snake bone bending assembly 5 can bend in all directions, so that the front detection probe can accurately point to any direction. Winding the two oppositely arranged pull ropes 54 in opposite directions on the same winding rod 59 can forcibly and synchronously tighten one pull rope and loosen the pull rope on the opposite side when the winding rod 59 is rotated.

[0033] Embodiment two

[0034] On the basis of embodiment one, the improvement is as follows:

[0035] As shown in Figures 1 to 5 , the tail plate 33 is fixedly connected in the cylinder of the fixed outer cylinder 31, the electric push rod 34 is fixedly connected to the tail plate 33, the movable front end of the electric push rod 34 is fixedly connected to the movable inner cylinder 35, the electric push rod 34 serves as a driving source, and the pushing stroke and speed are stable and controllable, which can push the movable inner cylinder 35 to the preset extended position or pull it back to the retracted position, so as to ensure that the opening and closing states of the baffle 32 are accurate and repeatable.

[0036] Further, the baffle plates 32 are annular and evenly distributed, each baffle plate 32 is connected with the opening end of the fixed outer cylinder 31 through an elastic rubber strip 39, the inner side of each baffle plate 32 is provided with a limiting sliding groove 310, the opening end of the movable inner cylinder 35 is connected with a flared cover 37, the front end of the flared cover 37 is clamped in the limiting sliding groove 310, the annular and evenly distributed baffle plates 32 can better close to form an approximately closed end face when being folded, and the protection effect is more comprehensive, each baffle plate 32 is connected with the fixed outer cylinder 31 through the elastic rubber strip 39, the restoring force of the baffle plate 32 from the outward expansion state to the folding state is provided, so that the baffle plate can be automatically closed when the movable inner cylinder 35 is retracted, the cooperation of the limiting sliding groove 310 and the flared cover 37 converts the linear motion of the movable inner cylinder 35 into the rotary opening and closing motion of the baffle plate 32, and the sliding connection of the front end of the flared cover 37 ensures that even if the baffle plate 32 is slightly pressed or adhered by dirt, the linear thrust provided by the flared cover 37 can also expand it, avoiding the risk of being stuck.

[0037] Further, the front end of the flared cover 37 is provided with an arc-shaped edge 38, and a dust screen 311 is fixedly connected in the cover of the flared cover 37, the arc-shaped edge 38 can make the flared cover 37 more smoothly enter the limiting sliding groove 310, reduce friction and jam, and the dust screen 311 can filter the airflow, reducing the risk of the detection probe 36 being contaminated or blocked.

[0038] As shown in Figure 1 , Figure 6 , Figure 7 and Figure 8 , the front end of the detector 1 is connected with a control pipe 4, two groups of control units are vertically and staggered arranged on the control pipe 4, the control unit further comprises a control rotating rod 57, the control rotating rod 57 is linked with a rope winding rod 59, the control rotating rod 57 movably penetrates one side wall of the control pipe 4, and a damping rubber sleeve 58 is sleeved on the rod body part of the control rotating rod 57 penetrating the control pipe 4, the two groups of control units are vertically and staggered arranged on the control pipe 4, which can intuitively map the bending control of the front end snake bone bending assembly 5 in two vertical directions in space, reduce the operation threshold, the staggered arrangement avoids the interference of the two control components in space, so that one hand can hold and rotate the two control rotating rods 57 respectively, and the damping force provided by the damping rubber sleeve 58 can effectively keep the position of the bending angle of the control rotating rod 57 and the whole snake bone bending assembly 5 stable after the operator releases the hand, avoiding the accidental deviation of the detection probe 36 due to the slight elastic retraction of the pull rope 54 or the change of the equipment posture.

[0039] Further, the two end cylindrical serpentine bones 51 are fixedly connected with positioning rings 52, the positioning rings 52 are fixedly connected with the inner wall of the goose neck pipe 2, the sleeve pipe 55 is movably sleeved on the rope between the cylindrical serpentine bone 51 and the control unit, the front end of the sleeve pipe 55 is fixedly connected with the goose neck pipe 2, the tail end of the sleeve pipe 55 is fixedly connected with the control pipe 4, the positioning ring 52 is fixed on the two end cylindrical serpentine bones 51 and connected with the inner wall of the goose neck pipe 2, which ensures that the whole serpentine bending assembly 5 is relatively fixed with the goose neck pipe in the length direction, and when the operator controls the serpentine bending assembly 5 to bend, the bending goose neck pipe 2 can also be bent, that is, the bending adjustment of the bending goose neck pipe 2 can be realized, the sleeve pipe 55 encapsulates the pull rope 54, so that the pull rope 54 is completely isolated from the internal environment of the goose neck pipe 2, the sleeve pipe 55 provides a special channel for the pull rope 54, and ensures that the pull rope 54 only slides in the preset path, so as to accurately control the bending adjustment of the serpentine bending assembly 5.

[0040] Further, the serpentine bending assembly 5 further comprises a front end limiting ring 53 and a tail end limiting ring 56, the front ends of the four pull ropes 54 are fixedly sleeved on the front end limiting ring 53 in a perpendicular manner, and the front end limiting ring 53 is fixedly connected with the inner wall of the goose neck pipe 2, the tail ends of the four pull ropes 54 are fixedly sleeved on the tail end limiting ring 56 in a perpendicular manner, and the tail end limiting ring 56 is fixedly connected with the inner wall of the control pipe 4, the front end limiting ring 53 and the tail end limiting ring 56 jointly build a stable mechanical framework for the four pull ropes 54, and the force of the four pull ropes 54 distributed in a perpendicular manner is accurately and concentratedly transmitted to the force starting point of the serpentine bending assembly 5, so that the winding and unwinding of each pull rope 54 can be converted into a bending torque of the cylindrical serpentine bone 51 in a specific direction without deviation.

[0041] Further, the control unit further comprises a worm wheel 510 and a worm 511, the worm wheel 510 is coaxially fixedly connected in the middle part of the rope winding rod 59, the two ends of the rope winding rod 59 are rotatably connected on the inner wall of the control pipe 4, the two pull ropes 54 are wound on the rope winding rod 59 on the two sides of the worm wheel 510, the worm 511 is coaxially fixedly connected with the control rotating rod 57, and the worm 511 is meshingly connected with the worm wheel 510, the worm 511 is used to drive the worm wheel 510, and the pull rope 54 is wound and unwound by the rope winding rod 59 coaxial with the worm wheel, and the one-way transmission characteristic of the worm wheel and worm pair is used, so that when the operator sets the positions of the worm wheel 510 and the rope winding rod 59 through the control rotating rod 57 and the worm 511, the positions are naturally locked and the worm wheel cannot be reversely driven to rotate, so as to ensure that the detection probe 36 keeps stable during detection.

[0042] Working principle: the operator holds the detector 1 and manually bends the gooseneck pipe 2 according to the approximate position of the area to be detected, and uses the arbitrarily shapeable characteristics to quickly send the front-end detection cylinder assembly 3 to the vicinity of the target area to complete the coarse positioning. Then, accurate orientation is carried out, and the operator manually rotates the two vertically staggered control rotating rods 57, which drives the coaxially fixed worm 511 to rotate, and the worm 511 drives the meshed worm gear 510 to rotate, and then the coaxially fixed rope winding rod 59 is rotated. Since the two oppositely arranged pull ropes 54 are wound in opposite directions on the same rope winding rod 59, the rotation of the rope winding rod 59 will simultaneously tighten one pull rope 54 and loosen the pull rope 54 on the opposite side, and this tension acts on the inner wall of the cylindrical snake bone 51, forcing the sequentially rotating cylindrical snake bones 51 to bend in a certain plane. Two sets of control units control the bending in two perpendicular directions, thereby synthesizing the deflection in any direction, and finally realizing the high-precision fine adjustment of the orientation of the detection cylinder assembly 3, so that the opening accurately aims at the suspected leakage point.

[0043] After positioning, detection is started, and the detector 1 controls the electric push rod 34 to act, and the movable end of the electric push rod 34 pushes the movable inner cylinder 35 to extend outward from the fixed outer cylinder 31, and the flared cover 37 fixed to the opening end of the movable inner cylinder 35 moves forward, and the arc-shaped edge 38 at the front end of the flared cover 37 slides along the limiting sliding groove 310 on the inner side of the baffle 32, forcing the baffle 32 connected by the elastic rubber strip 39 to be expanded outward, and at the same time, the detection probe 36 is sent to the sampling position, and the gas is filtered by the dust screen 311 and then actively guided to the detection probe 36 for high-concentration sampling and rapid analysis.

[0044] After detection, the electric push rod 34 is retracted, the movable inner cylinder 35 is pulled back, the baffle 32 is automatically closed under the restoring force of the elastic rubber strip 39, the detection probe 36 is sealed and protected in the fixed outer cylinder 31, and then the operator can manually straighten the gooseneck pipe 2 or withdraw the device as a whole.

[0045] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0046] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.

Claims

1. A combustible gas detection device comprising a detector (1), characterized in that: The front end of the detector (1) is connected with a gooseneck pipe (2), the front end of the gooseneck pipe (2) is connected with a detection cylinder assembly (3), the front end pipe body of the gooseneck pipe (2) is sleeved with a snake bone bending assembly (5), the detection cylinder assembly (3) is movably provided with a detection probe (36), the detection probe (36) is signal connected with the detector (1), the connecting part of the detector (1) and the gooseneck pipe (2) is provided with two groups of control units which are linked with the snake bone bending assembly (5), and the control paths of the two groups of control units are perpendicular. The detection cylinder assembly (3) comprises a fixed outer cylinder (31) and a movable inner cylinder (35) sleeved in the cylinder, the opening end of the fixed outer cylinder (31) is connected with a baffle (32), the detection probe (36) is fixedly connected in the movable inner cylinder (35), the baffle (32) is in a folded state when the movable inner cylinder (35) is in a retracted position, and the baffle (32) is in an outwardly expanded state when the movable inner cylinder (35) is in an extended position. The snake bone bending assembly (5) comprises four pull ropes (54) and a plurality of cylindrical snake bones (51) which are sequentially rotationally connected, the control unit comprises a rope winding rod (59), one end of the pull rope (54) is connected to the inner wall of the cylindrical snake bone (51), the other end of two oppositely arranged pull ropes (54) is wound on the rod of the rope winding rod (59), and the winding directions of the two pull ropes (54) on the rod of the rope winding rod (59) are opposite.

2. The combustible gas detection device of claim 1, wherein: The tail plate (33) is fixedly connected in the cylinder of the fixed outer cylinder (31), the electric push rod (34) is fixedly connected to the tail plate (33), and the movable front end of the electric push rod (34) is fixedly connected with the movable inner cylinder (35).

3. A combustible gas detection device according to claim 2, characterised in that: The baffle (32) is annular and uniformly provided with a plurality of baffle (32), each baffle (32) and the opening end of the fixed outer cylinder (31) are connected with an elastic rubber strip (39), the inner side of each baffle (32) is provided with a limiting sliding groove (310), the opening end of the movable inner cylinder (35) is connected with an expanding cover (37), and the front end of the expanding cover (37) is clamped in the limiting sliding groove (310).

4. A combustible gas detection device according to claim 3, characterised in that: The front end of the expanding cover (37) is provided with an arc-shaped edge (38), and the cover of the expanding cover (37) is further fixedly connected with a dust screen (311).

5. The combustible gas detection device of claim 1, wherein: The front end of the detector (1) is connected with a control pipe (4), two groups of control units are vertically and staggered arranged on the control pipe (4), the control unit further comprises a control rotating rod (57), the control rotating rod (57) is movably arranged in the control pipe (4), and the control rotating rod (57) is movably arranged in the control pipe (4).

6. A combustible gas detection device according to claim 5, characterised in that: The cylindrical snake bone (51) located at both ends is fixedly connected with a positioning ring (52), the positioning ring (52) is fixedly connected with the inner wall of the gooseneck pipe (2), the pull rope (54) is movably sleeved with a sleeve pipe (55) on the rope between the cylindrical snake bone (51) and the control unit, the front end of the sleeve pipe (55) is fixedly connected with the gooseneck pipe (2), and the tail end of the sleeve pipe (55) is fixedly connected with the control pipe (4).

7. The combustible gas detection apparatus of claim 1, wherein: The snake bone bending assembly (5) further comprises a front end limiting ring (53) and a tail end limiting ring (56), the front ends of the four pull ropes (54) are fixedly sleeved on the ring body of the front end limiting ring (53) in a mutually perpendicular manner, the front end limiting ring (53) is fixedly connected with the inner wall of the gooseneck pipe (2), the tail ends of the four pull ropes (54) are fixedly sleeved on the tail end limiting ring (56) in a mutually perpendicular manner, and the tail end limiting ring (56) is fixedly connected with the inner wall of the control pipe (4).

8. A combustible gas detection device according to claim 7, characterised in that: The control unit further comprises a worm wheel (510) and a worm (511), the worm wheel (510) is coaxially fixedly connected in the middle part of the rope winding rod (59), both ends of the rope winding rod (59) are rotatably connected to the inner wall of the control pipe (4), the two pull ropes (54) are wound on the rod body of the rope winding rod (59) on both sides of the worm wheel (510), the worm (511) is coaxially fixedly connected with the control rotating rod (57), and the worm (511) is meshingly connected with the worm wheel (510).

Images