CN211501179U

CN211501179U - Leakage fault detection device for hydraulic system

Info

Publication number: CN211501179U
Application number: CN202020039820.2U
Authority: CN
Inventors: 陈先村
Original assignee: Shanghai Yunli Transmission Technology Co ltd
Current assignee: Shanghai Yunli Transmission Technology Co ltd
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2020-09-15
Anticipated expiration: 2030-01-09

Abstract

The utility model discloses a hydraulic system leaks fault detection device, including the cylinder, the inner wall sliding connection of cylinder has the piston rod, and the one end outer wall of piston rod is equipped with the piston base, leave the oil pocket between the inner wall of piston base and cylinder, and one side inner wall that the cylinder is close to the oil pocket has the base through threaded connection, the inner wall of base is equipped with two sets of oil pipe, and wherein a set of oil pipe's outer wall is equipped with oil feed solenoid valve and oil pressure detection sensor to pressing from both sides. The utility model discloses divide into the triplex and detect cylinder body, oil pressure and piston rod, the cylinder body detects except that the outward appearance detects, through the piston rod that leaks to cause its fluid to the cylinder wall temperature and the unusual heat that the cylinder wall slides and produces, through the removal interval of displacement sensor detection piston rod four sides department, reduces and reveals the skew and the jam that causes the piston rod because of fluid, through the volume of oil pocket business turn over fluid and the change of its inside oil pressure, guarantees that the fluid measure under its different operating modes maintains at the dynamic balance level.

Description

Leakage fault detection device for hydraulic system

Technical Field

The utility model relates to a hydraulic system technical field especially relates to a hydraulic system leaks fault detection device.

Background

The hydraulic system functions to increase the force by changing the pressure. A complete hydraulic system consists of five parts, namely a power element, an actuator, a control element, an auxiliary element (attachment) and hydraulic oil. Hydraulic systems can be divided into two categories: hydraulic transmission systems and hydraulic control systems. Hydraulic drive systems have as a primary function the transmission of power and motion. Hydraulic control systems are designed to provide a hydraulic system output that meets specific performance requirements (particularly dynamic performance), and are generally referred to as hydraulic drive systems.

The leakage of a hydraulic transmission system is one of the most common faults of coal mine machinery, the leakage of working liquid is a non-negligible problem in hydraulic transmission, and if the leakage cannot be solved, the working performance of the system is influenced, hydraulic elements are damaged, resources are wasted, the environment is polluted, and the safety production is threatened.

The existing fault detection device can only detect problems of external cylinder body breakage by carrying out naked eye detection and conventional shell detection on oil liquid of the oil cylinder, and many internal problems can not be well found and stopped.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that exists among the prior art, and the hydraulic system who provides leaks fault detection device.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a hydraulic system leakage fault detection device comprises a cylinder barrel, wherein a piston rod is connected to the inner wall of the cylinder barrel in a sliding mode, a piston base is arranged on the outer wall of one end of the piston rod, an oil cavity is reserved between the piston base and the inner wall of the cylinder barrel, the inner wall of one side, close to the oil cavity, of the cylinder barrel is connected with a base through threads, two groups of oil pipes are arranged on the inner wall of the base, an oil inlet electromagnetic valve and an oil pressure detection sensor are oppositely arranged on the outer wall of one oil pipe group, an oil quantity extraction pump is arranged on the outer wall of the other oil pipe group, a shaft sleeve is clamped on the outer wall of one end, far away from the base, of the cylinder barrel, a dust ring, a support ring and a middle ring frame are sequentially arranged at the joint of the shaft sleeve and the piston rod, the middle ring frame is clamped in the middle of, and the middle part of the outer wall of the middle ring frame is connected with a balance frame in a sliding manner, the middle part of the outer wall of the cylinder barrel is provided with a heat conduction ring, the inner wall of the heat conduction ring is provided with a cylinder wall temperature detection sensor, and the cylinder wall temperature detection sensor is connected with a microprocessor through a signal line.

Preferably, one side of the piston rod, which is far away from the base, is integrally connected with a shaft head, and the outer wall of the shaft head is clamped with a supporting disk.

Preferably, the inner wall of the heat conduction ring is provided with a heat conduction ring groove, the inner wall of the heat conduction ring groove is clamped with a heat conduction ring group, and a heat insulation plate is arranged at the joint of the cylinder wall temperature detection sensor and the heat conduction ring group.

Preferably, the oil pipe that the oil pressure detection sensor connects is connected with the branch pipe to pressing from both sides, and the port of branch pipe and oil mass extraction pump is connected.

Preferably, the outer walls of the cylinder barrel and the piston rod are provided with sliding cavities, and the outer wall of the end part of the cylinder barrel, which is close to the sliding cavities, is connected with an oil plug through threads.

Preferably, displacement sensors are arranged on four sides of one side, opposite to the shaft sleeve and the shaft head, of the shaft sleeve, and signal ends of the displacement sensors are connected with the microprocessor through signal wires.

Preferably, the oil inlet electromagnetic valve and the oil quantity extraction pump are both connected with a switch, and the switches are connected with the microprocessor through wires.

The utility model has the advantages that:

1. the hydraulic system leakage fault detection device is based on an in-line oil cylinder and is divided into three parts for detecting a cylinder body, oil pressure and a piston rod, so that the source of the leakage problem can be found, the cylinder body detection is provided with cylinder wall temperature detection besides the traditional appearance detection, and abnormal heat generated by sliding of the piston rod and the cylinder wall due to oil leakage is detected by detecting the temperature of the cylinder wall, so that the transition damage of operation to elements after oil is lost is reduced;

2. the leakage fault detection device of the hydraulic system has the advantages that the piston rod is in four-side dynamic balance, the moving distances of the four sides of the piston rod are detected through the displacement sensors, the synchronization of the lifting positions of the oil cylinders is guaranteed, the deviation and the blockage of the piston rod caused by the leakage of oil are reduced, the oil quantity of the oil under different working conditions is guaranteed to be maintained at a dynamic balance level through the oil cavity inlet and outlet oil quantity and the change of the internal oil pressure, and the leakage quantity of the oil can be directly detected.

Drawings

Fig. 1 is a schematic view of a front view cross-sectional structure of a hydraulic system leakage fault detection device provided by the present invention;

fig. 2 is a schematic view of a local structure of a support plate of the hydraulic system leakage fault detection apparatus provided by the present invention;

fig. 3 is the utility model provides a hydraulic system leakage fault detection device's heat conduction ring structural schematic diagram.

In the figure: the device comprises a supporting plate 1, a guide sleeve 2, a cylinder barrel 3, a piston rod 4, a displacement sensor 5, a dust ring 6, a supporting ring 7, a shaft sleeve 8, a balance frame 9, a middle-placed frame ring 10, a piston base 11, an oil cavity 12, an oil inlet electromagnetic valve 13, an oil pressure detection sensor 14, an oil quantity extraction pump 15, an oil plug 16, a shaft head 17, a heat conduction ring 18, a heat conduction ring group 19 and a cylinder wall temperature detection sensor 20.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1-3, a hydraulic system leakage fault detection device comprises a cylinder 3, a piston rod 4 is slidably connected to the inner wall of the cylinder 3, a piston base 11 is arranged on the outer wall of one end of the piston rod 4, an oil cavity 12 is left between the piston base 11 and the inner wall of the cylinder 3, the inner wall of one side of the cylinder 3, which is close to the oil cavity 12, is connected with a base through a screw thread, two groups of oil pipes are arranged on the inner wall of the base, an oil inlet electromagnetic valve 13 and an oil pressure detection sensor 14 are oppositely arranged on the outer wall of one group of oil pipes, an oil extraction pump 15 is arranged on the outer wall of the other group of oil pipes, a shaft sleeve 8 is clamped on the outer wall of one end of the cylinder 3, which is far away from the base, a dust ring 6, a support ring 7 and a middle ring frame 10 are sequentially arranged at the joint of the shaft sleeve and the piston rod 4, the middle ring frame 10 is clamped in the middle of the, a balancing frame 9 is connected to the middle of the outer wall of the middle ring frame 10 in a sliding manner, a heat conducting ring 18 is arranged at the middle of the outer wall of the cylinder barrel 3, a cylinder wall temperature detecting sensor 20 is arranged on the inner wall of the heat conducting ring 18, the cylinder wall temperature detecting sensor 20 is connected with a microprocessor through a signal line, a shaft head 17 is integrally connected to one side, away from the base, of the piston rod 4, a supporting plate 1 is clamped on the outer wall of the shaft head 17, a heat conducting ring groove is formed in the inner wall of the heat conducting ring 18, a heat conducting ring group 2 is clamped on the inner wall of the heat conducting ring groove, a heat insulating plate is arranged at the joint of the cylinder wall temperature detecting sensor 20 and the heat conducting ring group 2, an oil pipe connected with an oil pressure detecting sensor 14 is connected with a branch pipe in a clamping manner, the branch pipe is connected with a port of an oil quantity extracting pump 15, a sliding cavity is reserved on the outer, and the signal end of the displacement sensor 5 is connected with the microprocessor through a signal wire, the oil inlet electromagnetic valve 13 and the oil quantity extraction pump 15 are both connected with a switch, and the switch is connected with the microprocessor through a conducting wire.

The working principle is as follows: the hydraulic system leakage fault detection device is based on an in-line cylinder and is divided into three parts for detecting a cylinder body, oil pressure and a piston rod 4, when leakage is found, firstly, the traditional appearance detection is carried out, obvious dissection is not carried out, then whether the temperature of the cylinder wall is abnormal or not is observed through a cylinder wall temperature detection sensor 20, abnormal heat generated by sliding of the piston rod 4 and the cylinder wall caused by oil leakage is mainly detected for the temperature of the cylinder wall, further, the transition damage of operation to elements after oil is lost is reduced, then, the moving distances of the four sides of a piston rod 4 are detected through displacement sensors 5 on the four sides of the piston rod 4, the synchronous lifting position of the piston rod 4 of the cylinder is ensured, the deviation and the blockage of the piston rod 4 caused by the oil leakage are reduced, finally, the oil quantity and the internal oil pressure of the oil chamber are ensured to be maintained at a dynamic balance level through the oil, can directly detect out whether fluid leaks and lets out the leakage quantity, if reveal, take out the cylinder oil through oil mass extraction pump 15, reduce fluid loss.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A hydraulic system leakage fault detection device comprises a cylinder barrel (3) and is characterized in that a piston rod (4) is connected to the inner wall of the cylinder barrel (3) in a sliding mode, a piston base (11) is arranged on the outer wall of one end of the piston rod (4), an oil cavity (12) is reserved between the piston base (11) and the inner wall of the cylinder barrel (3), the inner wall of one side, close to the oil cavity (12), of the cylinder barrel (3) is connected with a base through threads, two groups of oil pipes are arranged on the inner wall of the base, an oil inlet electromagnetic valve (13) and an oil pressure detection sensor (14) are oppositely arranged on the outer wall of one oil pipe group, an oil quantity extraction pump (15) is arranged on the outer wall of the other oil pipe group, a shaft sleeve (8) is clamped on the outer wall of one end, far away from the base, of the cylinder barrel (3), a dust ring (, the middle ring frame (10) is connected to the middle of the inner wall of the shaft sleeve (8) in a clamped mode, the middle ring frame (10) is connected to the outer wall of the piston rod (4) in a sliding mode, the dust ring (6) at the end portion connecting portion of the piston rod (4) and the shaft sleeve (8) is connected to the inner wall of the supporting ring (7) in a clamped mode, the middle of the outer wall of the middle ring frame (10) is connected with the balance frame (9) in a sliding mode, the middle of the outer wall of the cylinder barrel (3) is provided with the heat conducting ring (18), the inner wall of the heat conducting ring (18) is provided with the cylinder wall temperature detecting sensor (20), and the cylinder wall temperature detecting sensor (.

2. The hydraulic system leakage fault detection device according to claim 1, wherein a shaft head (17) is integrally connected to one side of the piston rod (4) away from the base, and a support plate (1) is clamped on an outer wall of the shaft head (17).

3. The hydraulic system leakage fault detection device according to claim 1, wherein the inner wall of the heat conduction ring (18) is provided with a heat conduction ring groove, the inner wall of the heat conduction ring groove is clamped with the heat conduction ring set (2), and a thermal insulation plate is arranged at the joint of the cylinder wall temperature detection sensor (20) and the heat conduction ring set (2).

4. The hydraulic system leakage fault detection device according to claim 1, wherein a branch pipe is connected to a pipe clamp connected to the oil pressure detection sensor (14), and the branch pipe is connected to a port of the oil pump (15).

5. The hydraulic system leakage fault detection device according to claim 1, wherein sliding cavities are reserved on the outer walls of the cylinder barrel (3) and the piston rod (4), and an oil plug (16) is connected to the outer wall of the end portion, close to the sliding cavities, of the cylinder barrel (3) through threads.

6. The hydraulic system leakage fault detection device according to claim 1, wherein displacement sensors (5) are arranged on four sides of the opposite side of the shaft sleeve (8) and the shaft head (17), and signal ends of the displacement sensors (5) are connected with the microprocessor through signal lines.

7. The hydraulic system leakage fault detection device according to claim 1, wherein the oil inlet solenoid valve (13) and the oil amount extraction pump (15) are both connected with a switch, and the switches are connected with the microprocessor through a lead.