One-way oil cylinder for gas in-place detection

Abstract

The utility model provides a one-way oil cylinder for gas in-place detection, and relates to the technical field of workpiece machining equipment, the one-way oil cylinder comprises a cylinder body, a bottom cover, a piston rod and a gas detection assembly, the cylinder body is provided with a through hole along the extension direction of the cylinder body, and one end of the cylinder body is connected with the bottom cover; the piston rod is connected with one end of the cylinder away from the bottom cover; the gas detection assembly is arranged in the through hole, one end of the gas detection assembly is inserted into the piston rod, an exhaust channel is formed in the gas detection assembly, the bottom cover is used for communicating the gas inlet with the gas detection assembly, and the end, away from the cylinder body, of the bottom cover is used for being connected with an external gas detection device so that gas exhausted by the exhaust channel can be exhausted to the gas detection device; the piston rod is used for adjusting the connecting position with the cylinder body. According to the utility model, the technical problems in the prior art that air inlets are respectively needed during loosening detection and clamping detection, so that the structure is complicated, and the device is only suitable for in-place detection of the low-pressure oil cylinder are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece processing equipment, in particular to a single-channel oil cylinder used for gas in-place detection. Background Art

[0002] In the actual production process of workpieces, in order to facilitate processing and ensure processing accuracy, a lever cylinder is sometimes used to clamp the workpiece before processing. The lever cylinder is generally provided with a cylinder, a piston, a pressure plate and a connecting rod. The top of the piston is hinged to one end of the pressure plate, and the two ends of the connecting rod are respectively hinged to the middle of the pressure plate and the cylinder, so that the cylinder, piston, pressure plate and connecting rod constitute a four-bar structure. The extension of the piston will push the pressure plate to press the workpiece, and the retraction of the piston will drive the pressure plate to loosen the workpiece. The existing lever cylinder has a relatively simple function. When the workpiece cannot be clamped due to incorrect clamping, damage to the piston rod, loose pressure plate, deformation of pressure plate or wear of the clamping point of the pressure plate, it cannot be discovered in time, resulting in the clamped workpiece cannot be clamped normally, which is easy to cause poor processing of the clamped workpiece or damage to the tool.

[0003] Therefore, it is necessary to solve the problem that the lever cylinder cannot detect poor workpiece clamping in time. However, in the existing detection device, gas in-place detection requires dual air circuits, that is, the relaxation detection and the clamping detection require air inlets respectively, and it is only applicable to the in-place detection of low-pressure oil cylinders. Utility Model Content

[0004] The utility model aims to provide a single-channel oil cylinder for gas in-place detection, so as to alleviate the technical problems existing in the prior art that air inlets are required for loosening detection and clamping detection respectively, resulting in a complicated structure, and the utility model is only applicable to low-pressure oil cylinder in-place detection.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In the first aspect, the utility model provides a single-channel oil cylinder for gas in-place detection, comprising a cylinder body, a bottom cover, a piston rod and a gas detection assembly, wherein the cylinder body is provided with a through hole along its extension direction, and one end of the cylinder body is connected to the bottom cover;

[0007] The piston rod is connected to one end of the cylinder body away from the bottom cover, and the piston rod is inserted into the through hole, and a cavity is formed along the extending direction of the piston rod, and the cavity is a structure that is wide at the top and narrow at the bottom;

[0008] The gas detection component is arranged in the through hole, one end of the gas detection component is inserted into the piston rod, and the gas detection component is provided with an exhaust channel, one end of the exhaust channel is connected to the cavity, and the other end is connected to the bottom cover;

[0009] The cylinder body is provided with a gas inlet;

[0010] The bottom cover is used to connect the gas inlet with the gas detection assembly, and one end of the bottom cover away from the cylinder body is used to connect with an external gas detection device to discharge the gas exhausted from the exhaust channel to the gas detection device;

[0011] The piston rod is used to adjust the gap width between the piston rod and the air inlet end of the gas detection component by adjusting the connection position with the cylinder body, thereby adjusting the air intake volume of the exhaust channel.

[0012] Furthermore, the outer wall of the piston rod is sleeved with a second sealing ring, and the second sealing ring is used to seal the gap between the outer wall of the piston rod and the inner wall of the through hole;

[0013] The inner wall of the piston rod is provided with a third sealing ring, and the third sealing ring is used to seal the gap between the inner wall of the piston rod and the outer wall of the gas detection component.

[0014] Further, the gas detection assembly comprises a detection rod and a gas detection sleeve, the gas detection sleeve is arranged outside the detection rod, and a gap for gas circulation is provided between the detection rod and the gas detection sleeve;

[0015] The detection rod and the gas detection sleeve are arranged in the through hole, and one end of the detection rod is connected to the cavity, and the other end is connected to the bottom cover, and the detection rod is provided with the exhaust channel.

[0016] Furthermore, a gas transmission channel is provided at one end of the detection rod inserted into the cavity, one end of the gas transmission channel is communicated with the exhaust channel, and the other end passes through the detection rod and is communicated with the outside world.

[0017] Furthermore, a fourth sealing ring and a fifth sealing ring are provided on the outer wall of one end of the detection rod inserted into the cavity, and the fourth sealing ring and the fifth sealing ring are both used for abutting and sealing against the inner wall of the cavity;

[0018] The gas delivery channel is arranged between the fourth sealing ring and the fifth sealing ring.

[0019] Furthermore, a sixth sealing ring is provided on the outer wall of the gas inspection sleeve, and the sixth sealing ring is used to seal the gap between the outer wall of the gas inspection sleeve and the bottom cover.

[0020] Furthermore, the bottom cover is provided with a passage, one end of which is connected to the gas inlet, and the other end of which is connected to the gap between the detection rod and the gas detection sleeve;

[0021] The bottom cover is provided with a seventh sealing ring, and the seventh sealing ring is used to seal the gap between the bottom cover and the cylinder body.

[0022] Furthermore, the bottom cover is provided with a branch, the branch is communicated with the passage, and a blocking component is provided in the branch, and the blocking component is used to block the passage.

[0023] Further, the plugging assembly includes a plug, an elastic member, a steel ball and a first sealing ring, the plug is connected to the port of the branch, and the plug is connected to the steel ball through the elastic member;

[0024] The steel ball is used to block the branch and the passage;

[0025] The first sealing ring is connected to the plug, and the first sealing ring is used to seal the gap between the plug and the steel ball.

[0026] Furthermore, a dust ring is provided in the through hole of the cylinder body, the dust ring is connected to the outer wall of the piston rod, and the dust ring is used to seal the gap between the outer wall of the piston rod and the hole wall of the through hole.

[0027] The utility model can achieve the following beneficial effects:

[0028] In the first aspect, the utility model provides a single-way oil cylinder for gas in-place detection, comprising a cylinder body, a bottom cover, a piston rod and a gas detection component, the cylinder body is provided with a through hole along its extension direction, and one end of the cylinder body is connected to the bottom cover; the piston rod is connected to the end of the cylinder body away from the bottom cover, and the piston rod is inserted into the through hole, and the piston rod is provided with a cavity along its extension direction, and the cavity is a structure that is wide at the top and narrow at the bottom; the gas detection component is arranged in the through hole, one end of the gas detection component is inserted into the piston rod, and the gas detection component is provided with an exhaust channel, one end of the exhaust channel is connected to the cavity, and the other end is connected to the bottom cover; the cylinder body is provided with a gas inlet; the bottom cover is used to connect the gas inlet with the gas detection component, and the end of the bottom cover away from the cylinder body is used to be connected to an external gas detection device to discharge the gas discharged from the exhaust channel to the gas detection device; the piston rod is used to adjust the gap width between it and the air inlet end of the gas detection component by adjusting the connection position with the cylinder body, thereby adjusting the air intake of the exhaust channel.

[0029] In the utility model, the cylinder body and the bottom cover are detachably connected, and a through hole is provided in the cylinder body and the bottom cover in the vertical direction, and the piston rod and the gas detection component are inserted into the through hole, one end of the gas detection component is inserted into the cavity of the piston rod, and the other end is connected to the bottom cover; when in use, gas is filled in through the cylinder body, and the gas enters the gas detection component after passing through the gas path. At this time, the user adjusts the position of the piston rod inserted into the through hole according to actual needs, that is, when the piston rod is fully inserted into the bottom and is in a relaxed state, the gas enters the exhaust channel from the gap of the gas detection component, and then is detected by the gas detection device; when the piston rod is pulled out to the top position and is in a clamped state, the gas cannot enter the exhaust channel after passing through the gap of the gas detection component; and in the process of stretching from the bottom to the top, the gas enters the exhaust channel and the cavity respectively through the gap of the gas detection component, and then all enters the gas detection device from the exhaust channel for detection.

[0030] Compared with the prior art, the utility model provides a single-channel oil cylinder for gas in-place detection, which adjusts the position of piston rod insertion and the gas path relationship of the gas detection component to achieve detection of different states of the oil cylinder during clamping, release and operation through only one gas path and one gas detection device.

[0031] In summary, the utility model at least alleviates the technical problems existing in the prior art that air inlets are required for loosening detection and clamping detection respectively, resulting in a complicated structure, and is only applicable to low-pressure oil cylinder in-place detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the three-dimensional structure of a single-channel oil cylinder for gas arrival detection provided by an embodiment of the utility model;

[0034] Figure 2 A schematic cross-sectional view of the internal structure of a single-channel oil cylinder for gas in-place detection provided by an embodiment of the utility model;

[0035] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of part A;

[0036] Figure 4 for Figure 2 A magnified schematic diagram of the structure of part B in FIG.

[0037] Figure 5 for Figure 2 An enlarged schematic diagram of the C-section structure.

[0038] Icons: 1-cylinder body; 11-gas inlet; 12-dustproof ring; 2-bottom cover; 21-sealing assembly; 211-plug; 212-elastic part; 213-steel ball; 214-first sealing ring; 22-fixing screw; 23-passageway; 24-high-pressure ball plug; 25-discharge channel; 26-seventh sealing ring; 3-piston rod; 31-cavity; 32-second sealing ring; 33-third sealing ring; 4-detection rod; 41-exhaust channel; 411-gas transmission channel; 42-fourth sealing ring; 43-fifth sealing ring; 5-gas inspection sleeve; 51-sixth sealing ring. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present utility model, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model 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 operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" 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, or it can be an indirect connection 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.

[0045] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0046] Embodiment 1

[0047] This embodiment provides a single-channel oil cylinder for gas in-place detection, referring to Figure 1 or Figure 2 The single-way oil cylinder for gas in-place detection comprises a cylinder body 1, a bottom cover 2, a piston rod 3 and a gas detection component. The cylinder body 1 is provided with a through hole along its extension direction, and one end of the cylinder body 1 is connected to the bottom cover 2; the piston rod 3 is connected to the end of the cylinder body 1 away from the bottom cover 2, and the piston rod 3 is inserted into the through hole, and the piston rod 3 is provided with a cavity 31 along its extension direction, and the cavity 31 is a structure of being wide at the top and narrow at the bottom; the gas detection component is arranged in the through hole, one end of the gas detection component is inserted into the piston rod 3, and the gas detection component is provided with an exhaust channel 4 1, one end of the exhaust channel 41 is connected to the cavity 31, and the other end is connected to the bottom cover 2; the cylinder body 1 is provided with a gas inlet 11; the bottom cover 2 is used to connect the gas inlet 11 with the gas detection component, and the end of the bottom cover 2 away from the cylinder body 1 is used to be connected to an external gas detection device to discharge the gas discharged from the exhaust channel 41 to the gas detection device; the piston rod 3 is used to adjust the gap width between it and the air inlet end of the gas detection component by adjusting the connection position with the cylinder body 1, thereby adjusting the air intake amount of the exhaust channel 41.

[0048] The embodiments of the utility model at least alleviate the technical problems existing in the prior art that air inlets are required for loosening detection and clamping detection respectively, resulting in a complicated structure, and that the technology is only applicable to low-pressure oil cylinder in-place detection.

[0049] In an embodiment of the utility model, the cylinder body 1 and the bottom cover 2 are detachably connected, and a through hole is provided in the cylinder body 1 and the bottom cover 2 along the vertical direction, and the piston rod 3 and the gas detection component are inserted into the through hole, one end of the gas detection component is inserted into the cavity of the piston rod 3, and the other end is connected to the bottom cover 2; when in use, gas is filled in through the cylinder body 1, and the gas enters the gas detection component after passing through the gas path. At this time, the user adjusts the position of the piston rod 3 inserted into the through hole according to actual needs, that is, when the piston rod 3 is fully inserted into the bottom and is in a relaxed state, the gas enters the exhaust channel 41 from the gap of the gas detection component, and then is detected by the gas detection device; when the piston rod 3 is pulled out to the top position and is in a clamped state, the gas cannot enter the exhaust channel 41 after passing through the gap of the gas detection component; and in the process of stretching from the bottom to the top, the gas enters the exhaust channel 41 and the cavity 31 respectively through the gap of the gas detection component, and then all enters the gas detection device from the exhaust channel 41 for detection.

[0050] Compared with the prior art, the embodiment of the utility model provides a single-path oil cylinder for gas in-place detection, which adjusts the insertion position of the piston rod 3 and the gas path relationship of the gas detection component, so that the different states of the oil cylinder during clamping, release and operation can be detected by only one gas path and one gas detection device.

[0051] In an optional implementation manner of this embodiment, refer to Figure 2 A second sealing ring 32 is provided on the outer wall of the piston rod 3, and the second sealing ring 32 is used to seal the gap between the outer wall of the piston rod 3 and the inner wall of the through hole; a third sealing ring 33 is provided on the inner wall of the piston rod 3, and the third sealing ring 33 is used to seal the gap between the inner wall of the piston rod 3 and the outer wall of the gas detection component.

[0052] Specifically: the piston rod 3 is inserted into the outer wall of one end of the through hole, and a second sealing ring 32 is provided along its circumference, and the second sealing ring 32 seals the piston rod 3 and the inner wall of the through hole; and a third sealing ring 33 is provided along the circumference of its inner wall, and the third sealing ring 33 seals the piston rod 3 and the gas detection component; preferably, through two groups of sealing rings, it is achieved that when the piston rod 3 moves along the opening direction of the through hole, it can maintain a sealed state with the inner wall of the through hole and the gas detection component at any time to avoid gas leakage.

[0053] Further, refer to Figure 2 or Figure 3 The gas detection component includes a detection rod 4 and a gas detection sleeve 5, the gas detection sleeve 5 is sleeved on the outside of the detection rod 4, and a gap for gas circulation is provided between the detection rod 4 and the gas detection sleeve 5; the detection rod 4 and the gas detection sleeve 5 are arranged in the through hole, and one end of the detection rod 4 is connected to the cavity 31, and the other end is connected to the bottom cover 2, and the detection rod 4 is provided with an exhaust channel 41.

[0054] Specifically, the gas inspection sleeve 5 is circumferentially covered on the outer wall of the detection rod 4 , and a gap for gas circulation is provided between the gas inspection sleeve 5 and the outer wall of the detection rod 4 , and an opening is provided at the top of the gas inspection sleeve 5 , and the opening is used to allow the gas in the gap to flow out.

[0055] Further, refer to Figure 3 A gas delivery channel 411 is provided at one end of the detection rod 4 inserted into the cavity 31 , one end of the gas delivery channel 411 is connected to the exhaust channel 41 , and the other end passes through the detection rod 4 and is connected to the outside.

[0056] Specifically: one end of the gas supply channel 411 is connected to the exhaust channel 41, and the other end is connected to the outside through the detection rod 4; preferably, the gas in the gap between the gas inspection sleeve 5 and the detection rod 4 can directly enter the exhaust channel 41 from the exhaust channel 41 when the piston rod 3 is in operation, and then be discharged from the exhaust channel 41.

[0057] Further, refer to Figure 3 The outer wall of one end of the detection rod 4 inserted into the cavity 31 is provided with a fourth sealing ring 42 and a fifth sealing ring 43, and the fourth sealing ring 42 and the fifth sealing ring 43 are both used to abut and seal with the inner wall of the cavity 31; the gas transmission channel 411 is provided between the fourth sealing ring 42 and the fifth sealing ring 43.

[0058] Specifically: the cavity 31 is a structure of being narrow at the top, wide in the middle and narrow at the bottom, and is divided into a top narrow body part, a middle wide body part and a bottom narrow body part. The top of the detection rod 4 is not connected to the gas inspection sleeve 5, and the top of the detection rod 4 is provided with a fourth sealing ring 42 and a fifth sealing ring 43 from top to bottom, and the entrance end of the gas transmission channel 411 is located between the fourth sealing ring 42 and the fifth sealing ring 43. When in use, in the relaxed state, the piston rod 3 is inserted into the through hole, at which time the fourth sealing ring 42 is tightly abutted against the top narrow body part, and the fifth sealing ring 43 is located in the middle wide body part, at which time the gas enters the exhaust channel 41 from the gas transmission channel 411; during operation, the fourth sealing ring 42 and the fifth sealing ring 43 are both located in the middle wide body part, at which time the gas enters the cavity 31 and the gas transmission channel 411, and finally enters the exhaust channel 41; and in the clamped state, the fifth sealing ring 43 is abutted against the bottom narrow body part, at which time the gas cannot enter the gas transmission channel 411 and the cavity 31.

[0059] In an optional implementation manner of this embodiment, refer to Figure 5 The outer wall of the gas inspection sleeve 5 is provided with a sixth sealing ring 51 , and the sixth sealing ring 51 is used to seal the gap between the outer wall of the gas inspection sleeve 5 and the bottom cover 2 .

[0060] Specifically, the sixth sealing ring 51 is used to seal the gap between the outer wall of the gas inspection sleeve 5 and the bottom cover 2 to prevent gas from overflowing from the gap between the sixth sealing ring 51 and the bottom cover 2 .

[0061] In an optional implementation manner of this embodiment, refer to Figure 2 The bottom cover 2 is provided with a passage 23, one end of the passage 23 is connected to the gas inlet 11, and the other end is connected to the gap between the detection rod 4 and the gas detection sleeve 5; the bottom cover 2 is provided with a seventh sealing ring 26, and the seventh sealing ring 26 is used to seal the gap between the bottom cover 2 and the cylinder body 1.

[0062] Specifically: one end of the passage 23 is connected to the gas inlet 11 , and the other end is connected to the gap between the detection rod 4 and the gas inspection sleeve 5 ; preferably, the gas inlet 11 can be connected to the gap between the detection rod 4 and the gas inspection sleeve 5 through the passage 23 .

[0063] Further, refer to Figure 2 or Figure 4 The bottom cover 2 is provided with a branch, the branch is connected with the passage 23 , and a blocking component 21 is provided in the branch, and the blocking component 21 is used to block the passage 23 .

[0064] Specifically, the bottom cover 2 is provided with a branch, and the branch is opened from the bottom of the bottom cover 2 and communicates with the passage 23, and a blocking component 21 is provided in the branch, and the blocking component 21 is used to block the passage.

[0065] Further, refer to Figure 4 The sealing assembly 21 includes a plug 211, an elastic member 212, a steel ball 213 and a first sealing ring 214. The plug 211 is connected to the port of the branch, and the plug 211 is connected to the steel ball 213 through the elastic member 212; the steel ball 213 is used to seal the branch and the passage 23; the first sealing ring 214 is connected to the plug 211, and the first sealing ring 214 is used to seal the gap between the plug 211 and the steel ball 213.

[0066] Specifically: the plug 211 is inserted into the branch, and an elastic member 212 is provided in the plug 211, and the elastic member 212 is preferably a spring, the other end of the spring abuts against the steel ball 213, and the connecting end of the branch and the passage 23 is retracted inward so that the steel ball 213 abuts and seals at this connecting end, and the first sealing ring 214 is used to further seal the edge of the steel ball 213 to prevent the gas in the passage 23 from entering the plug 211.

[0067] In an optional implementation manner of this embodiment, refer to Figure 2 A dust ring 12 is provided in the through hole of the cylinder body 1, and the dust ring 12 is connected to the outer wall of the piston rod 3, and the dust ring 12 is used to seal the gap between the outer wall of the piston rod 3 and the hole wall of the through hole.

[0068] Specifically: the dust ring 12 is connected to the outer wall of the piston rod 3, and the dust ring 12 is used to seal the gap between the outer wall of the piston rod 3 and the wall of the through hole; thereby ensuring that when the user pushes and pulls the piston rod 3 to move, external dust will not enter through the gap between the outer wall of the piston rod 3 and the wall of the through hole.

[0069] Preferably, the bottom cover 2 further includes fixing screws 22 , preferably five fixing screws 22 , and the five fixing screws 22 are distributed at intervals along the circumference of the bottom cover 2 to achieve a detachable connection between the bottom cover 2 and the cylinder body 1 .

[0070] Preferably, the bottom cover 2 is further provided with a discharge channel 25 , and the discharge channel 25 is connected to an external gas detection device, and the discharge channel 25 is communicated with the exhaust channel 41 , so that the gas in the exhaust channel 41 can be discharged through the discharge channel 25 .

[0071] Preferably, one end of the passage 23 passes through the bottom cover 2, and a high-pressure ball plug 24 is provided at this end.

[0072] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referenced to each other; the above embodiments in this specification are only used to illustrate the technical solution of the utility model, rather than to limit it; although the utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that: it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A single-channel oil cylinder for gas in-place detection, characterized in that: It comprises a cylinder body (1), a bottom cover (2), a piston rod (3) and a gas detection assembly, wherein the cylinder body (1) is provided with a through hole along its extension direction, and one end of the cylinder body (1) is connected to the bottom cover (2); The piston rod (3) is connected to one end of the cylinder body (1) away from the bottom cover (2), and the piston rod (3) is inserted into the through hole. The piston rod (3) is provided with a cavity (31) along its extension direction, and the cavity (31) is a structure that is wide at the top and narrow at the bottom. The gas detection component is arranged in the through hole, one end of the gas detection component is inserted into the piston rod (3), and the gas detection component is provided with an exhaust channel (41), one end of the exhaust channel (41) is communicated with the cavity (31), and the other end is connected to the bottom cover (2); The cylinder body (1) is provided with a gas inlet (11); The bottom cover (2) is used to connect the gas inlet (11) with the gas detection component, and the end of the bottom cover (2) away from the cylinder body (1) is used to connect with an external gas detection device to discharge the gas exhausted from the exhaust channel (41) to the gas detection device; The piston rod (3) is used to adjust the gap width between it and the air inlet end of the air detection component by adjusting the connection position with the cylinder body (1), thereby adjusting the air intake volume of the exhaust channel (41).

2. The single-channel oil cylinder for gas in-place detection according to claim 1 is characterized in that: The outer wall of the piston rod (3) is sleeved with a second sealing ring (32), and the second sealing ring (32) is used to seal the gap between the outer wall of the piston rod (3) and the inner wall of the through hole; The inner wall of the piston rod (3) is provided with a third sealing ring (33), and the third sealing ring (33) is used to seal the gap between the inner wall of the piston rod (3) and the outer wall of the gas detection component.

3. The single-channel oil cylinder for gas in-place detection according to claim 2 is characterized in that: The gas detection assembly comprises a detection rod (4) and a gas detection sleeve (5), wherein the gas detection sleeve (5) is sleeved on the outside of the detection rod (4), and a gap for gas circulation is provided between the detection rod (4) and the gas detection sleeve (5); The detection rod (4) and the gas inspection sleeve (5) are arranged in the through hole, and one end of the detection rod (4) is connected to the cavity (31), and the other end is connected to the bottom cover (2), and the detection rod (4) is provided with the exhaust channel (41).

4. The single-channel oil cylinder for gas arrival detection according to claim 3 is characterized in that: One end of the detection rod (4) inserted into the cavity (31) is provided with a gas delivery channel (411); one end of the gas delivery channel (411) is connected to the exhaust channel (41), and the other end passes through the detection rod (4) and is connected to the outside.

5. The single-channel oil cylinder for gas arrival detection according to claim 4 is characterized in that: The outer wall of one end of the detection rod (4) inserted into the cavity (31) is provided with a fourth sealing ring (42) and a fifth sealing ring (43), and the fourth sealing ring (42) and the fifth sealing ring (43) are both used to abut against and seal against the inner wall of the cavity (31); The gas delivery channel (411) is arranged between the fourth sealing ring (42) and the fifth sealing ring (43).

6. The single-channel oil cylinder for gas arrival detection according to claim 3 is characterized in that: The outer wall of the gas inspection sleeve (5) is provided with a sixth sealing ring (51), and the sixth sealing ring (51) is used to seal the gap between the outer wall of the gas inspection sleeve (5) and the bottom cover (2).

7. The single-channel oil cylinder for gas in-place detection according to claim 3 is characterized in that: The bottom cover (2) is provided with a passage (23), one end of the passage (23) is connected to the gas inlet (11), and the other end is communicated with the gap between the detection rod (4) and the gas detection sleeve (5); The bottom cover (2) is provided with a seventh sealing ring (26), and the seventh sealing ring (26) is used to seal the gap between the bottom cover (2) and the cylinder body (1).

8. The single-channel oil cylinder for gas in-place detection according to claim 7 is characterized in that: The bottom cover (2) is provided with a branch, the branch is in communication with the passage (23), and a blocking component (21) is provided in the branch, the blocking component (21) is used to block the passage (23).

9. The single-channel oil cylinder for gas arrival detection according to claim 8, characterized in that: The plugging assembly (21) comprises a plug (211), an elastic member (212), a steel ball (213) and a first sealing ring (214); the plug (211) is connected to the port of the branch, and the plug (211) is connected to the steel ball (213) via the elastic member (212); The steel ball (213) is used to block the branch and the passage (23); The first sealing ring (214) is connected to the plug (211), and the first sealing ring (214) is used to seal the gap between the plug (211) and the steel ball (213).

10. The single-channel oil cylinder for gas in-place detection according to claim 1, characterized in that: A dust ring (12) is provided in the through hole of the cylinder body (1), the dust ring (12) is connected to the outer wall of the piston rod (3), and the dust ring (12) is used to seal the gap between the outer wall of the piston rod (3) and the hole wall of the through hole.

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