CN219035203U - Oil cylinder internal leakage detection device - Google Patents

Abstract

The application relates to an oil cylinder internal leakage detection device, and relates to the technical field of oil cylinders. The oil storage cavity is arranged in the cylinder body, the piston is slidably connected in the cylinder body, one side of the piston is the oil storage cavity, the other side of the piston is the oil-free cavity, the side wall of the cylinder body is provided with an oil inlet and an air outlet, the oil inlet is communicated with the oil storage cavity, the air outlet is communicated with the oil-free cavity, the air outlet is communicated with an oil collecting tank, a micro detection assembly is arranged in the oil collecting tank and comprises oil absorbing paper and a photoelectric sensor, the oil absorbing paper is arranged on the oil collecting tank and is used for blocking the oil collecting tank, the transmitting end and the receiving end of the photoelectric sensor are both arranged on the inner wall of the oil collecting tank and are positioned on the same horizontal line, the transmitting end of the photoelectric sensor is positioned on one side of the oil absorbing paper, the receiving end is positioned on the other side of the oil absorbing paper, and the air outlet is positioned between the oil absorbing paper and the cylinder body. This application has the oil mass that leaks in the cylinder body and can obtain the effect of warning when less.

Description

Oil cylinder internal leakage detection device

Technical Field

The application relates to the field of oil cylinders, in particular to an oil cylinder internal leakage detection device.

Background

The oil cylinder is a hydraulic cylinder, and the hydraulic cylinder is a linear motion type executing element with output force being in direct proportion to the effective area of the piston and the pressure difference on two sides of the piston. The hydraulic cylinder is an energy conversion device that converts hydraulic energy into mechanical energy for reciprocating rectilinear motion. The hydraulic cylinder basically consists of a cylinder barrel, a cylinder cover, a piston rod, a sealing device, a buffer device and an exhaust device. The buffer device and the exhaust device are necessary for other devices depending on the specific application. And the hydraulic system can malfunction due to the internal leakage of the oil cylinder.

In order to solve the problems, the Chinese patent document with the publication number of CN201885862U relates to a single-acting oil cylinder internal leakage detection device, which comprises a cylinder body, wherein a pressure cavity, a piston and a non-pressure cavity are arranged in the cylinder body, an oil inlet is arranged at the lower part of the cylinder body, an air outlet is arranged at the upper part of the cylinder body, the lower part of an oil storage tank is communicated with the air outlet, a floater is arranged in the oil storage tank and floats above the liquid level, the floater is connected with a limit switch through a connecting rod, and an exhaust valve is arranged at the upper part of the oil storage tank. The air outlet of the single-acting oil cylinder is communicated with the oil storage tank, when internal leakage occurs around the piston of the oil cylinder, the liquid level of the oil storage tank is raised, the float is pushed to rise, and the limit switch is conducted to send out alarm information, so that whether the internal leakage occurs in the single-acting oil cylinder can be detected in real time.

The related art in the above has the following drawbacks: when the oil leakage in the cylinder body is less, the oil quantity entering the oil storage tank through the exhaust port is smaller, so that the liquid level of the oil in the oil storage tank has no obvious change, the floating distance of the floating ball is smaller, the connecting rod is not enough to be connected with the limit switch, namely, alarm information cannot be obtained, and the oil leakage in the cylinder body is difficult to detect when the oil quantity is less, so that the cylinder body needs to be improved.

Disclosure of Invention

In order to solve the problem that the oil leakage in the cylinder body is difficult to detect when the oil leakage in the cylinder body is small, the application provides an oil cylinder inner leakage detection device.

The application provides an oil cylinder internal leakage detection device adopts following technical scheme:

an in-cylinder leak detection device, comprising:

the cylinder body is hollow, a piston is arranged in the cylinder body, the circumferential side wall of the piston is abutted against the inner wall of the cylinder body, one side of the piston in the cylinder body is an oil storage cavity, the other side of the piston is an oil-free cavity, an oil inlet is formed in the side wall of one end of the cylinder body, which is communicated with the oil storage cavity, an air outlet is formed in the side wall of one end of the cylinder body, which is communicated with the oil-free cavity, a piston rod is fixedly connected to one side of the piston, which extends out of the cylinder body;

the oil collecting tank is communicated with the air outlet, an air outlet is formed in the oil collecting tank, and an exhaust valve is arranged on the air outlet; and

the micro-detection assembly is arranged in the oil collecting tank and comprises oil absorbing paper and a photoelectric sensor, the oil absorbing paper is vertically arranged in the oil collecting tank and is blocked, the transmitting end and the receiving end of the photoelectric sensor are both arranged on the inner wall of the oil collecting tank and are located at the same horizontal height, the transmitting end of the photoelectric sensor is located on one side of the oil absorbing paper, the receiving end of the photoelectric sensor is located on the other side of the oil absorbing paper, and the exhaust port is located between the oil absorbing paper and the cylinder body.

By adopting the technical scheme, oil enters the oil storage cavity from the oil inlet, the piston is pushed to move upwards, gas in the oil-free cavity is extruded, and the gas in the oil-free cavity enters the oil collection tank through the gas outlet and is discharged through the gas outlet. When the internal leakage occurs in the cylinder body, part of oil enters the oil-free cavity, the piston moves upwards to push the oil in the oil-free cavity to enter the oil collecting tank, and when the oil quantity of the internal leakage in the cylinder body is small, the oil quantity entering the oil collecting tank through the air outlet is small.

When the oil overflows to the oil absorbing paper, the oil drops to the surface of the oil absorbing paper, so that the oil can wet the oil absorbing paper, and the oil can infiltrate and fill the gaps on the oil absorbing paper. Whereas the refractive index of the oil is closer to that of oil absorbing paper, the fiber-oil interface is much weaker than the light reflection, and the main reflection exists only between the oil-smoothed surface and the air. The surface of the oil absorbing paper becomes smooth and transparent, so that light emitted by the emitting end of the photoelectric sensor easily passes through the oil absorbing paper, and the receiving end of the photoelectric sensor can receive the light emitted by the emitting end of the photoelectric sensor, so that alarm information is emitted, and detection when the oil leakage in the cylinder body is small is realized.

Optionally, the method further comprises:

the connecting frame, be provided with the slot on the lateral wall of oil collecting tank, the connecting frame can be vertically inserted and establish in the slot, oil absorption paper links to each other and covers the connecting frame with the connecting frame.

By adopting the technical scheme, the connecting frame is placed above the oil collecting tank, is aligned with the slot and moves downwards until the connecting frame is completely inserted into the slot, so that the installation of the oil absorbing paper can be realized.

Optionally, the oil absorption paper is provided with the hook tape near one side of connecting frame, one side that the connecting frame is close to the oil absorption paper is provided with the fine hair area, fine hair area and hook tape laminating mutually.

Through adopting above-mentioned technical scheme, after the oil absorption of oil absorption paper, photoelectric sensor sends alarm information all the time, needs to change new oil absorption paper this moment, takes out from the slot with the linking frame, separates the hook strip on the old oil absorption paper with the fine hair area, laminates the hook strip on the new oil absorption paper with the fine hair area mutually, can realize the change of oil absorption paper on the linking frame, the simple operation.

Optionally, a connection ring is arranged at the top of the connection frame.

Through adopting above-mentioned technical scheme, after the connecting frame inserts in the slot, the connecting frame inlays and establishes in the oil collecting tank, when needs change oil absorbing paper, pulls the go-between, can drive two bags of paper extraction slot with the connecting frame, and the go-between provides the application of force position, is convenient for take out the connecting frame mounting groove.

Optionally, the method further comprises:

the mounting block is arranged on the top wall of the oil collecting tank, a mounting groove is formed in the top wall of the mounting block, the connecting ring is hinged to the connecting frame, and the connecting ring can be inserted into the mounting groove;

the magnet is arranged on the inner wall of the mounting groove; and

and the iron sheet is arranged on the side wall of the connecting ring and can be attached to the magnet.

Through adopting above-mentioned technical scheme, after the frame drives the oil absorption paper and inserts the slot, rotate the go-between for in the go-between inserts the mounting groove, at this moment, magnet and iron sheet laminating mutually for the go-between is fixed in the mounting groove, and the go-between is difficult for separating with the installation piece promptly. Therefore, the connecting frame is not easy to separate from the oil collecting tank, the connection stability of the connecting frame and the oil collecting tank is improved, and the stability of the oil absorbing paper mounted on the oil collecting tank is improved.

Optionally, an accommodating groove is formed in the top wall of the mounting block, and the accommodating groove is communicated with the mounting groove.

Through adopting above-mentioned technical scheme, when needs change the oil absorbing paper, need take out the linking bridge promptly and leave the slot, the holding tank plays the effect of stepping down for the user stretches the hand to the holding tank in direct contact with the lateral wall of go-between, and lifts up the go-between, makes the go-between take out the mounting groove completely, can then carry the pull-up linking bridge and move the linking bridge and take out the slot, simple operation.

Optionally, the method further comprises:

the limiting block is provided with a limiting hole on the inner wall of the accommodating groove and is inserted into the limiting hole;

the limiting spring is arranged between the limiting block and the inner wall of the limiting hole, and the pushing spring is used for pushing the limiting block to the direction close to the inner wall of the mounting groove.

Through adopting above-mentioned technical scheme, after the go-between inserts and establishes in the mounting groove, the stopper is under limit spring's effect with the lateral wall looks butt of go-between to apply to the go-between to the direction extrusion force near the mounting groove inner wall, make produce relative effort between the inner wall of stopper and mounting groove, thereby make the spacing ring be difficult for taking out the mounting groove, further increased the steadiness that go-between and installation piece are connected, thereby increased the steadiness that the connecting frame inserts in the slot. When the connecting ring is required to be lifted, the limiting block is pushed to extrude the limiting spring, so that the end wall of the limiting block is abutted against the side wall of the connecting ring, the connecting ring loses extrusion force, and the connecting ring is convenient to be pulled out of the mounting groove.

Optionally, the method further comprises: a macro detection component, the macro detection component comprising:

the oil storage tank is communicated with one end, far away from the cylinder body, of the oil collecting tank;

the floating ball is positioned in the oil storage tank;

the connecting rod is vertically arranged and is connected to the oil collecting tank in a sliding manner, and the connecting rod is connected with the floating ball; and

the warning switch is arranged on the oil collecting tank and is positioned right above the connecting rod.

Through adopting above-mentioned technical scheme, when the oil that leaks in the cylinder body is more, flood whole oil collecting tank and pour into to the batch oil tank in, easily make the photoelectric sensor on the oil collecting tank inner wall malfunctioning, after more oil gets into the batch oil tank along the oil collecting tank afterwards, make the liquid level of oil in the batch oil tank have obvious rising, thereby drive the floater and shift up, and then make the connecting rod move up along vertical direction, until with warning switch butt, make warning switch on, send alarm information, realize the detection to more oil mass, also can have further alternative scheme when photoelectric sensor is inoperative simultaneously, leak to the leak detection when leaking in more oil mass effectively.

In summary, the present application includes at least one of the following beneficial effects:

1. when the oil amount leaked from the inside of the cylinder body is small, the oil entering the oil collecting tank through the air outlet is small, and when the oil reaches the oil absorbing paper, the oil is easy to adsorb on the oil absorbing paper, so that the surface of the oil absorbing paper is soaked, the surface of the oil absorbing paper becomes smooth, the light emitted by the emitting end of the photoelectric sensor is easy to pass through the oil absorbing paper, the receiving end of the photoelectric sensor can receive the light emitted from the emitting end of the photoelectric sensor, and alarm information is emitted, so that the detection of the small oil leakage in the cylinder body is realized;

2. the connecting frame is placed above the oil collecting tank, is aligned with the slot and moves downwards until the connecting frame is completely inserted into the slot, and the installation of the oil absorbing paper can be realized.

Drawings

FIG. 1 is a schematic diagram of a device for detecting leakage in an oil cylinder;

FIG. 2 is a schematic diagram of a connection between a piston and a cylinder according to an embodiment of the present disclosure;

FIG. 3 is an enlarged view of FIG. 2 at A;

fig. 4 is a schematic structural diagram for showing a connection relationship between a connection frame and an oil collecting tank in the embodiment of the present application;

fig. 5 is an enlarged view at B in fig. 4.

In the figure: 10. a cylinder; 11. an oil storage chamber; 12. no oil cavity exists; 13. an oil inlet; 14. an air outlet; 20. a piston; 30. an oil collecting tank; 31. an exhaust port; 311. an exhaust valve; 32. a slot; 40. a macro detection component; 41. an oil storage tank; 42. a floating ball; 43. a connecting rod; 44. a warning switch; 50. a micro-detection assembly; 51. oil absorbing paper; 511. a hook tape; 52. a photoelectric sensor; 60. a connection frame; 61. a velvet belt; 70. a connecting ring; 71. iron sheet; 80. a mounting block; 81. a mounting groove; 811. a magnet; 82. a receiving groove; 83. a limiting hole; 90. a limiting block; 110. and a limit spring.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-5.

Fig. 1 is a schematic structural diagram of an in-cylinder leakage detection device. Referring to fig. 1, the embodiment of the application discloses an oil cylinder internal leakage detection device, which comprises a cylinder body 10, wherein the cylinder body 10 is vertically arranged, an oil inlet 13 and an air outlet 14 are arranged on the side wall of the cylinder body 10 in a penetrating manner, the oil inlet 13 is positioned at the bottom of the cylinder body 10, and the air outlet 14 is positioned at the top of the cylinder body 10.

Fig. 2 is a schematic structural diagram for illustrating the connection relationship between the piston 20 and the cylinder 10 in the embodiment of the present application. Referring to fig. 2, an oil storage cavity 11 and an oil-free cavity 12 are arranged in a cylinder body 10, an oil inlet 13 is communicated with the oil storage cavity 11, an air outlet 14 is communicated with the oil-free cavity 12, a piston 20 is arranged in the cylinder body 10, the circumferential side wall of the piston 20 is abutted against the inner wall of the cylinder body 10, the oil storage cavity 11 and the oil-free cavity 12 are bounded by the piston 20, the oil storage cavity 11 is arranged below the piston 20, and the oil-free cavity 12 is arranged above the piston 20. The side wall of the cylinder body 10 is welded with an oil collecting tank 30, the air outlet 14 is communicated with the oil collecting tank 30, and an air outlet 31 is formed in the top wall of the oil collecting tank 30 in a penetrating manner.

When the cylinder body 10 works, oil enters the oil storage cavity 11 from the oil inlet 13, can push the piston 20 to move upwards, extrudes gas in the oil-free cavity 12, and the gas in the oil-free cavity 12 enters the oil collection tank 30 through the gas outlet 14 and is discharged through the gas outlet 31.

Referring to fig. 3, when an internal leakage occurs in the cylinder 10, a part of oil enters the oil-free chamber 12, and enters the oil collecting tank 30 from the air outlet 14 under the pushing of the piston 20. In order to detect the internal leakage, a micro detection assembly 50 is provided on the oil collecting tank 30, and an exhaust valve 311 is provided on the exhaust port 31, so that the oil leaked in the internal is extruded into the oil collecting tank 30 by the piston 20, and then does not flow out through the exhaust port 31 but flows along the oil collecting tank 30 under the blocking of the exhaust valve 311.

Referring to fig. 3, in detail, the micro-inspection assembly 50 includes an oil absorbing paper 51 and a photo sensor 52, the oil absorbing paper 51 is disposed on the oil collecting tank 30 and seals the oil collecting tank 30, a transmitting end and a receiving end of the photo sensor 52 are both installed on an inner wall of the oil collecting tank 30 and at the same level, the transmitting end of the photo sensor 52 is located at one side of the oil absorbing paper 51, the receiving end is located at the other side of the oil absorbing paper 51, and the exhaust port 31 is located between the oil absorbing paper 51 and the cylinder 10.

Referring to fig. 2 and 3, when the amount of oil leaked inside the cylinder 10 is small, the amount of oil entering the oil collecting tank 30 through the air outlet 14 is small, and when the oil overflows to the oil absorbing paper 51, the oil drops to the surface of the oil absorbing paper 51, wets the oil absorbing paper 51, and the oil dips into and fills the gaps on the oil absorbing paper 51. Whereas the refractive index of the oil is closer to that of the oil absorbing paper 51, the reflection of light at the interface of the fiber and the oil is much weaker, and the main reflection exists only between the surface smoothed by the oil and the air. The surface of the oil absorbing paper 51 becomes smooth and transparent, so that light emitted by the emitting end of the photoelectric sensor 52 easily passes through the oil absorbing paper 51, and further the receiving end of the photoelectric sensor 52 can receive the light emitted by the emitting end of the photoelectric sensor 52, so that alarm information is emitted, and detection of the cylinder body 10 with less oil leakage is realized.

Fig. 4 is a schematic structural diagram for showing the connection relationship between the connection frame 60 and the oil collecting tank 30 in the embodiment of the present application. Referring to fig. 4, in order to mount the oil absorbing paper 51 on the oil collecting tank 30, a slot 32 is formed on a sidewall of the oil collecting tank 30, a connection frame 60 is vertically inserted in the slot 32, a hook strip 511 is disposed on a side of the oil absorbing paper 51 adjacent to the connection frame 60, and a velvet strip 61 adapted to the hook strip 511 is disposed on a side of the connection frame 60 adjacent to the oil absorbing paper 51. The installation of the oil absorbing paper 51 on the connection frame 60 can be realized by attaching the velvet belt 61 and the hook belt 511, then placing the connection frame 60 above the oil collecting tank 30, aligning with the slot 32, and moving downwards until the connection frame 60 is completely inserted into the slot 32.

Referring to fig. 4, after the connection frame 60 is inserted into the slot 32, the connection frame 60 is embedded in the oil collecting tank 30, when the oil absorbing paper 51 absorbs oil, the connection frame 60 needs to be pulled out of the slot 32 when the oil absorbing paper needs to be replaced, in order to facilitate the pulling out of the connection frame 60, a connection ring 70 is hinged on the top wall of the connection frame 60, and the connection frame 60 can be pulled out of the slot 32 by directly pulling the connection ring 70.

Referring to fig. 5, in order to increase the stability of the connection ring 70 inserted in the slot 32, a mounting block 80 is fixed to the top wall of the oil collecting tank 30, a mounting groove 81 is formed in the top wall of the mounting block 80, the connection ring 70 may be inserted in the mounting groove 81, a magnet 811 is fixed to the inner wall of the mounting groove 81, an iron piece 71 is correspondingly fixed to the side wall of the connection ring 70, and when the connection frame 60 is inserted in the slot 32, the connection ring 70 is rotated so that the connection ring 70 is inserted in the mounting groove 81, and at this time, the iron piece 71 is attached to the magnet 811, so that the connection ring 70 is fixed in the mounting groove 81, i.e., the connection ring 70 is not easily separated from the mounting block 80. Therefore, the connecting frame 60 is not easy to separate from the oil collecting tank 30, the connection stability of the connecting frame 60 and the oil collecting tank 30 is increased, and the stability of the oil absorbing paper 51 mounted on the oil collecting tank 30 is increased.

Referring to fig. 5, since the inner wall of the mounting groove 81 is attached to the side wall of the connection ring 70, it is inconvenient to pull the connection ring 70 out of the mounting groove 81, and in order to facilitate the connection ring 70 to be pulled out of the mounting groove 81, a receiving groove 82 is further formed in the top wall of the mounting block 80, the receiving groove 82 is communicated with the mounting groove 81, and when the connection ring 70 needs to be pulled out, a user stretches his hand into the receiving groove 82 to directly contact with the side wall of the connection ring 70 and lifts the connection ring 70, so as to realize the connection ring 70 to be pulled out of the mounting groove 81.

Referring to fig. 5, in order to further increase the stability of the connection ring 70 inserted in the installation groove 81, a limiting hole 83 is formed in the inner wall of the accommodating groove 82, a limiting block 90 is inserted in the limiting hole 83, a limiting spring 110 is disposed on the inner wall of one side of the limiting block 90 and the limiting hole 83 away from the inner wall of the installation groove 81, and the limiting spring 110 is used for pushing the limiting block 90 in a direction approaching to the inner wall of the installation groove 81. After the connecting ring 70 is inserted into the mounting groove 81, the limiting block 90 abuts against the side wall of the connecting ring 70 under the action of the limiting spring 110, and applies a directional extrusion force to the connecting ring 70, which is close to the inner wall of the mounting groove 81, so that a relative acting force is generated between the limiting block 90 and the inner wall of the mounting groove 81, and the limiting ring is not easy to withdraw from the mounting groove 81, so that the connection stability of the connecting ring 70 and the mounting block 80 is further improved, and the insertion stability of the connecting frame 60 into the slot 32 is further improved.

When the connecting ring 70 needs to be lifted, the limiting block 90 is pushed to press the limiting spring 110, so that the end wall of the limiting block 90 is abutted against the side wall of the connecting ring 70, the connecting ring 70 loses the pressing force, and the connecting ring 70 is conveniently pulled out of the mounting groove 81.

Referring to fig. 3, when more oil leaks in the cylinder 10, the whole air outlet 14 is filled to continuously flow to the oil collecting tank 30, so that the photoelectric sensor 52 on the inner wall of the oil collecting tank 30 is easy to fail, therefore, in order to prevent the occurrence of leak detection, a macro detection assembly 40 is connected to one end of the oil collecting tank 30 far from the cylinder 10, and the macro detection assembly 40 comprises an oil storage tank 41, a floating ball 42, a connecting rod 43 and a warning switch 44. The oil storage tank 41 and the oil collection tank 30 are integrally formed at one end far away from the cylinder body 10 and are communicated with the oil collection tank 30, oil is stored in the oil storage tank 41, the floating ball 42 is placed in the oil storage tank 41 and floats on the liquid surface of the oil, and the connecting rod 43 is vertically arranged and fixed with the floating ball 42. One end of the connecting rod 43, which is far away from the floating ball 42, extends out of the top wall of the oil collecting tank 30, and the warning switch 44 is mounted on the top wall of the oil collecting tank 30. And is located directly above the connecting rod 43.

When the oil amount leaked in the cylinder body 10 is large, after the oil enters the oil storage tank 41 along the oil collection tank 30, the liquid level of the oil in the oil storage tank 41 is obviously increased, so that the floating ball 42 is driven to move upwards, the connecting rod 43 is further enabled to move upwards along the vertical direction until being abutted with the warning switch 44, the warning switch 44 is enabled to be conducted, warning information is sent, and leakage detection when more oil amount is leaked in is effectively avoided.

The implementation principle of the oil cylinder internal leakage detection device provided by the embodiment of the application is as follows: when the cylinder body 10 works, oil enters the oil storage cavity 11 from the oil inlet 13, can push the piston 20 to move upwards, extrudes gas in the oil-free cavity 12, and the gas in the oil-free cavity 12 enters the oil collection tank 30 through the gas outlet 14 and is discharged through the gas outlet 31. When internal leakage occurs in the cylinder 10, part of oil enters the oil-free cavity 12, the oil in the oil-free cavity 12 is pushed to enter the oil collecting tank 30 in the process of upward movement of the piston 20, when the oil quantity of the internal leakage in the cylinder 10 is small, the oil quantity entering the oil collecting tank 30 through the air outlet 14 is small, when the oil reaches the oil absorbing paper 51, the oil is easy to adsorb on the oil absorbing paper 51, so that the oil absorbing paper 51 is soaked, the surface of the oil absorbing paper 51 becomes smooth, light emitted by the emitting end of the photoelectric sensor 52 is easy to pass through the oil absorbing paper 51, and then the receiving end of the photoelectric sensor 52 can receive the light emitted by the emitting end of the photoelectric sensor 52, so that alarm information is emitted, and detection of the small oil leakage in the cylinder 10 is realized. When more oil is leaked, the oil is introduced into the macro detection assembly 40 through the oil collecting tank 30, so that a large amount of oil leakage warning is realized.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. An in-cylinder leakage detection device, comprising:

the cylinder body (10), the inside cavity of cylinder body (10), be equipped with piston (20) in cylinder body (10), the circumference lateral wall of piston (20) and the inner wall butt of cylinder body (10), one side of piston (20) is oil storage chamber (11) in cylinder body (10), and the opposite side is oilless chamber (12), cylinder body (10) with the one end lateral wall of oil storage chamber (11) intercommunication is equipped with oil inlet (13), cylinder body (10) with the one end lateral wall of oilless chamber (12) intercommunication is equipped with gas outlet (14), piston (20) are located one side fixed connection piston rod in oilless chamber (12), just the piston rod extends outside cylinder body (10);

the oil collecting tank (30), the oil collecting tank (30) is communicated with the air outlet (14), an air outlet (31) is arranged on the oil collecting tank (30), and an air outlet valve (311) is arranged on the air outlet (31); and

the micro detection assembly (50) is arranged in the oil collecting tank (30), the micro detection assembly (50) comprises oil absorbing paper (51) and a photoelectric sensor (52), the oil absorbing paper (51) is vertically arranged in the oil collecting tank (30) and is plugged, the emitting end and the receiving end of the photoelectric sensor (52) are both arranged on the inner wall of the oil collecting tank (30) and are located at the same horizontal height, the emitting end of the photoelectric sensor (52) is located on one side of the oil absorbing paper (51), the receiving end is located on the other side of the oil absorbing paper (51), and the exhaust port (31) is located between the oil absorbing paper (51) and the cylinder body (10).

2. The in-cylinder leakage detection device according to claim 1, further comprising:

the oil collecting box comprises a connecting frame (60), wherein a slot (32) is formed in the side wall of the oil collecting box (30), the connecting frame (60) can be vertically inserted into the slot (32), and the oil absorbing paper (51) is connected with the connecting frame (60) and covers the connecting frame (60).

3. The oil cylinder internal leakage detection device according to claim 2, wherein a hook strip (511) is arranged on one side of the oil absorbing paper (51) close to the connecting frame (60), a velvet strip (61) is arranged on one side of the connecting frame (60) close to the oil absorbing paper (51), and the velvet strip (61) is attached to the hook strip (511).

4. The oil cylinder internal leakage detection device according to claim 2, wherein a connecting ring (70) is provided at the top of the connecting frame (60).

5. The in-cylinder leakage detection device according to claim 4, further comprising:

the mounting block (80) is arranged on the top wall of the oil collecting tank (30), a mounting groove (81) is formed in the top wall of the mounting block (80), the connecting ring (70) is hinged on the connecting frame (60), and the connecting ring (70) can be inserted into the mounting groove (81);

a magnet (811) provided on the inner wall of the installation groove (81); and

and an iron piece (71) provided on the side wall of the connection ring (70), wherein the iron piece (71) can be attached to the magnet (811).

6. The in-cylinder leakage detection device according to claim 5, wherein a receiving groove (82) is provided on a top wall of the mounting block (80), and the receiving groove (82) is communicated with the mounting groove (81).

7. The in-cylinder leakage detection device according to claim 6, further comprising:

the limiting block (90) is arranged on the inner wall of the accommodating groove (82), and the limiting block (90) is inserted into the limiting hole (83);

the limiting spring (110) is arranged between the limiting block (90) and the inner wall of the limiting hole (83), and the limiting spring (110) is used for pushing the limiting block (90) towards the direction close to the inner wall of the mounting groove (81).

8. The in-cylinder leakage detection device according to claim 1, further comprising: a macro detection component (40), the macro detection component (40) comprising:

an oil storage tank (41), wherein the oil storage tank (41) is communicated with one end of the oil collection tank (30) away from the cylinder body (10);

a floating ball (42), wherein the floating ball (42) is positioned in the oil storage tank (41);

the connecting rod (43) is vertically arranged and is connected to the oil collecting tank (30) in a sliding manner, and the connecting rod (43) is connected with the floating ball (42); and

the warning switch (44) is arranged on the oil collecting tank (30), and the warning switch (44) is positioned right above the connecting rod (43).

Images