Oil leakage detection device for hydraulic station

Abstract

The invention belongs to the technical field of hydraulic systems, and particularly relates to a hydraulic station oil leakage detection device which comprises a hydraulic oil tank, an oil filling port is formed in the upper portion of the hydraulic oil tank, and an oil leakage detection mechanism is detachably arranged in the oil filling port; the oil leakage detection mechanism comprises a mounting cylinder, an inner cylinder is arranged on the inner side of the mounting cylinder, a filter cylinder is arranged on the bottom side of the inner cylinder, a floating cavity is formed between the mounting cylinder and the inner cylinder, a plurality of oil inlets are formed in the circumference of the mounting cylinder, and a plurality of overflow ports are formed in the circumference of the inner cylinder; a sensor is arranged at the upper end of the cover body, a limiting groove is formed in the cover body, and the floating rod is slidably arranged in the limiting groove; a floating ring is arranged at the bottom end of the floating rod and arranged in the floating cavity. A strip-shaped through groove is formed in the floating rod in the height direction, and a reflecting plate used for shielding and reflecting sensor signals is arranged at the bottom end of the through groove. The device can judge the oil leakage condition of the hydraulic station, can efficiently and reliably recover oil, and avoids waste of hydraulic oil.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic systems, and in particular relates to an oil leakage detection device for a hydraulic station. Background Art

[0002] The hydraulic station is a hydraulic source device or a hydraulic device including a control valve, which is composed of a hydraulic pump, a driving motor, a hydraulic pump, an oil tank, a directional valve, a throttle valve, a relief valve, etc. The oil is supplied according to the flow direction, pressure and flow required by the driving device. It is suitable for various machines where the driving device is separated from the hydraulic station. The hydraulic station is connected to the driving device (cylinder or motor) with an oil pipe, and the hydraulic system can achieve various prescribed actions.

[0003] During the operation of the hydraulic station's drive device (cylinder, motor, electric motor, hydraulic pump, etc.), due to the influence of many factors such as technical process, product quality, unit vibration, etc., the hydraulic station and its affiliated valve bodies and oil pipe connections become loose, resulting in oil leakage in the hydraulic station.

[0004] Existing hydraulic station leakage oil collection usually uses an oil collecting box, and the leaked oil drips into the oil collecting box. However, multiple oil collecting boxes are arranged in multiple hydraulic stations respectively, and personnel need to check them regularly in turn, which is time-consuming and labor-intensive. At the same time, the oil collecting box cannot timely and effectively collect the leaked oil, which easily causes energy waste and makes the hydraulic station leakage oil detection and collection efficiency low. Summary of the invention

[0005] In view of the technical problems existing in the background technology, the present invention provides a hydraulic station oil leakage detection device, which can accurately detect the oil leakage of the hydraulic station and collect the leaked hydraulic oil in a timely and efficient manner.

[0006] To achieve the above purpose, the technical solution provided by the present invention is:

[0007] A hydraulic station oil leakage detection device comprises a motor, a hydraulic pump and a valve assembly arranged on a hydraulic oil tank, a rectangular oil baffle plate is arranged on the upper end of the hydraulic oil tank, and the motor, the hydraulic pump and the valve assembly are arranged on the inner side of the oil baffle plate; a refueling port is opened on the upper part of the hydraulic oil tank, and an oil leakage detection mechanism is detachably arranged in the refueling port; the oil leakage detection mechanism comprises a mounting cylinder, a cover body, a float rod and a sensor, an inner cylinder is arranged on the inner side of the mounting cylinder, a filter cylinder is integrally extended and arranged on the bottom side of the inner cylinder, a floating cavity is formed between the mounting cylinder and the inner cylinder, a plurality of oil inlets are arranged on the circumference of the mounting cylinder, and the circumference of the inner cylinder A plurality of overflow ports are arranged around the cover, and the height of the overflow ports is lower than the height of the oil inlet; a sensor is arranged on the upper end of the cover body, and a positioning column is extended from the bottom of the cover body, and the positioning column is threadedly connected to the inner wall of the inner tube; a limiting groove is arranged on the cover body, and the float rod is slidably arranged in the limiting groove; a floating ring is arranged at the bottom end of the float rod, and the floating ring is arranged in the floating cavity; the float rod is provided with a strip-shaped through groove along the height direction, and a reflecting plate for shielding and reflecting the sensor signal is arranged at the bottom end of the through groove, and when oil leaks, the oil enters the floating cavity through the oil inlet, thereby driving the float rod to move upward so that the reflecting plate and the signal transmitting end of the sensor are facing each other.

[0008] Optionally, the outer wall of the mounting tube is provided with a threaded portion, the refueling port is a stepped hole, the stepped hole has three sections of through holes with successively decreasing diameters from the outside to the inside of the hydraulic oil tank, the threaded portion is threadedly connected to the inner wall of the through hole in the outer section of the refueling port, and the outer wall of the mounting tube is in close contact with the inner wall of the through hole in the inner section of the refueling port.

[0009] Optionally, a plurality of confluence grooves are provided at the upper end of the hydraulic oil tank, one end of the confluence grooves extends toward the refueling port, a drainage groove is provided at the end of the confluence grooves, and the drainage grooves are connected to the through holes in the middle section of the refueling port.

[0010] Optionally, the reflective plate is arranged obliquely in the through groove.

[0011] Optionally, the inner diameter of the floating ring is larger than the outer diameter of the inner cylinder, or the outer diameter of the floating ring is smaller than the inner diameter of the mounting cylinder.

[0012] Optionally, at least one push rod is provided on the circumference of the bottom end of the floating ring, a partition is provided between the mounting tube and the inner tube, a conical valve port connected to the push rod is provided on the partition, the bottom end of the partition constitutes a mounting cavity, a one-way valve is provided in the mounting cavity, the one-way valve includes a spring arranged in the mounting cavity and a valve body connected to the spring, the valve body is close to the conical valve port, the outer diameter of the push rod is smaller than the inner diameter of the conical valve port; a plurality of discharge ports connected to the mounting cavity are provided on the circumference of the bottom end of the inner tube.

[0013] Optionally, the confluence groove is symmetrically arranged on both sides of the motor and the hydraulic pump, and the interfaces on both sides of the hydraulic pump are respectively connected to an oil outlet pipe and an oil inlet pipe, the oil inlet pipe is connected to the inside of the hydraulic oil tank, and the oil outlet pipe is connected to the valve assembly.

[0014] The present invention has the following advantages and beneficial effects:

[0015] The present invention provides a hydraulic station oil leakage detection device. When the hydraulic station leaks oil, the leaked oil enters the floating chamber through the oil inlet, thereby driving the floating ring and the floating rod to move upward synchronously so that the reflector and the signal transmitting end of the sensor are aligned, so that the sensor detects the signal, and it can be determined that the hydraulic station has leaked oil. When the oil leaks too much, the oil flows from the overflow port to the inside of the filter cartridge, and after being filtered by the filter cartridge, it is recovered again into the hydraulic oil tank, thereby realizing efficient and reliable oil recovery and avoiding waste of hydraulic oil.

[0016] When a hydraulic oil leak is detected, the sensor can feed back to the control system and automatically alarm. For subsequent processing, you only need to manually press the float rod to drive the float ring down, and the push rod pushes the one-way valve to open, so that the leaked hydraulic oil in the float chamber flows into the installation chamber and flows from the drain port to the filter cartridge for filtration and recovery. In this way, the leaked oil in the float chamber can be completely drained and emptied. After the leakage point is repaired, the detection mechanism can be put back into operation for oil leakage detection without disassembling the detection mechanism, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A structural diagram of the hydraulic station oil leakage detection device provided by the present invention;

[0018] Figure 2 for Figure 1 Front view of

[0019] Figure 3 for Figure 2 A top view of

[0020] Figure 4 A cross-sectional view of the oil leakage detection mechanism provided by the present invention connected to the oil filling port;

[0021] Figure 5 A structural diagram of the oil leakage detection mechanism provided by the present invention;

[0022] Figure 6 A structural diagram of a cover body and a sensor provided by the present invention;

[0023] Figure 7 A structural diagram of the installation tube provided by the present invention;

[0024] Figure 8 for Figure 7 Front view of

[0025] Fig. 9 for Figure 8 Sectional view along the AA direction;

[0026] Fig.10 for Fig. 9 A partial enlarged view of point a in the middle;

[0027] Fig.11 A structural diagram of the floating rod and floating ring provided by the present invention;

[0028] Fig.12 A cross-sectional view of the floating rod and the floating ring provided by the present invention;

[0029] Icons: 1-Hydraulic oil tank, 11-Oil baffle, 12-Converging groove, 13-Oil return port, 14-Refueling port, 15-Drainage groove, 2-Motor, 21-Hydraulic pump, 22-Oil inlet pipe, 23-Oil outlet pipe, 24-Valve assembly, 25-Oil outlet, 4-Cover, 41-Limiting groove, 42-Location column, 5-Sensor, 51-Signal transmitting end, 6-Floating rod, 61-Through groove, 62-Reflecting plate, 63-Floating ring, 64-Push rod, 7-Mounting cylinder, 7a-Floating chamber, 7b-Filter chamber, 7c-Mounting chamber, 71-Inner cylinder, 72-Threaded part, 73-Oil inlet, 74-Overflow port, 75-Partition, 76-Drain port, 77-Filter cartridge, 78-Conical valve port, 781-Valve body, 782-Spring. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions 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 only part of the embodiments of the present invention, not all of the embodiments.

[0031] 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 invention claimed for protection, 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.

[0032] Example

[0033] like Figures 1 to 3 As shown, a hydraulic station oil leakage detection device includes a motor 2, a hydraulic pump 21, a valve assembly 24, etc. arranged on a hydraulic oil tank 1.

[0034] like Figures 1 to 3As shown, a rectangular oil baffle plate 11 is provided at the upper end of the hydraulic oil tank 1, and a cavity for collecting leaked oil is formed by the oil baffle plate 11. The motor 2 and the hydraulic pump 21 are connected for transmission, and the motor 2 and the hydraulic pump 21 are fixed integrally at the upper end of the hydraulic oil tank 1. The two sides of the hydraulic pump 21 are symmetrically connected with an oil inlet pipe 22 and an oil outlet pipe 23, respectively. The oil inlet pipe 22 is connected to the inside of the hydraulic oil tank 1, and the oil outlet pipe 23 is connected to the valve assembly 24. One side of the valve assembly 24 has an oil outlet 25, and the hydraulic oil is passed to the driving mechanism (cylinder, motor, etc.) through the oil outlet 25. The hydraulic oil tank 1 is also provided with an oil return port 13, and the return oil of the hydraulic system finally flows back to the inside of the hydraulic oil tank 1 through the oil return port 13. The motor 2, the hydraulic pump 21 and the valve assembly 24 are arranged on the inner side of the oil baffle plate 11. Since the joints of the pump body, the valve assembly 24 and the like are concentrated, this place is most prone to oil leakage, so all of the above components are arranged in the oil baffle plate 11, and the leaked oil can be recovered in a centralized manner.

[0035] like Figures 1 to 12 As shown, a refueling port 14 is provided at the upper part of the hydraulic oil tank 1, and the refueling port 14 is arranged inside the oil baffle 11. An oil leakage detection mechanism is detachably provided in the refueling port 14. The oil leakage detection mechanism includes a mounting cylinder 7, a cover body 4, a float rod 6 and a sensor 5. An inner cylinder 71 is provided inside the mounting cylinder 7, and a filter cylinder 77 is integrally extended from the bottom side of the inner cylinder 71. A floating chamber 7a is formed between the mounting cylinder 7 and the inner cylinder 71, and a filter chamber 7b is formed inside the filter cylinder 77 and the inner cylinder 71. A plurality of oil inlets 73 are provided on the circumference of the mounting cylinder 7, and a plurality of overflow ports 74 are provided on the circumference of the inner cylinder 71. The height of the overflow port 74 is lower than the height of the oil inlet 73. The upper end of the cover body 4 is provided with a sensor 5, and the bottom of the cover body 4 is provided with a positioning column 42, which is threadedly connected to the inner wall of the inner tube 71. The cover body 4 is provided with a limiting groove 41, and the shape of the limiting groove 41 is consistent with the shape of the floating rod 6, and the floating rod 6 is slidably arranged in the limiting groove 41. The bottom end of the floating rod 6 is provided with a floating ring 63, which is made of a lightweight material, such as plastic, etc. The inside of the floating ring 63 can be hollow to reduce the weight. The floating ring 63 is arranged in the floating cavity 7a, and there is a gap between the floating ring 63 and the inner tube 71 or the outer tube for oil to flow through. The floating rod 6 is provided with a strip-shaped through groove 61 along the height direction, and the bottom end of the through groove 61 is provided with a reflecting plate 62 for shielding and reflecting the signal of the sensor 5. When oil leaks, the oil enters the float chamber 7a through the oil inlet 73, and the oil level in the float chamber 7a rises, thereby driving the float ring 63 and the float rod 6 to move upward so that the reflector 62 and the signal transmitting end 51 of the sensor 5 are facing each other, so that the signal emitted by the sensor 5 can be reflected and received, and the oil leak is detected.

[0036] The present invention provides a hydraulic station oil leakage detection device. When the hydraulic station leaks oil, the leaked oil enters the floating chamber 7a through the oil inlet 73, thereby driving the floating ring 63 and the floating rod 6 to move upward synchronously so that the reflector 62 and the signal transmitting end 51 of the sensor 5 are aligned, so that the sensor 5 detects the signal, and it can be determined that the hydraulic station has leaked oil. When the oil leaks too much, the oil flows from the overflow port 74 to the inside of the filter cartridge 77, and after being filtered by the filter cartridge 77, it is recovered again into the hydraulic oil tank 1, so that efficient and reliable oil recovery can be achieved to avoid waste of hydraulic oil.

[0037] Furthermore, the outer wall of the installation cylinder 7 is provided with a threaded portion 72, and the refueling port 14 is a stepped hole, which has three through holes with decreasing diameters from the outer side to the inner side of the hydraulic oil tank 1, and the threaded portion 72 is threadedly connected to the inner wall of the through hole of the outer section of the refueling port 14, and the outer wall of the installation cylinder 7 is closely attached to the inner wall of the through hole of the inner section of the refueling port 14. In this way, the installation cylinder 7 and the refueling port 14 can be detachably connected.

[0038] Furthermore, the upper end of the hydraulic oil tank 1 is provided with a plurality of confluence grooves 12, which are symmetrically arranged on both sides of the motor 2 and the hydraulic pump 21, one end of the confluence groove 12 extends toward the refueling port 14, and the end of the confluence groove 12 is provided with a drainage groove 15, which is connected to the through hole in the middle section of the refueling port 14. When oil leaks, the oil flows through the confluence grooves 12 to the drainage grooves 15, and finally reaches the through hole in the middle section of the refueling port 14, and then enters the floating chamber 7a from the oil inlet 73, realizing the oil collection operation.

[0039] Furthermore, the reflector 62 is tilted in the through slot 61. The advantage of such a design is that when tilted, the sensor 5 can detect different data, such as Figure 4 As shown, at this time, the reflector 62 extends obliquely to the lower right side. Then, when oil leaks, the floating ring 63 rises, driving the floating rod 6 to rise, and finally the rising reflector 62 is detected by the sensor 5. Since the reflector 62 is set obliquely, as the liquid level of the floating chamber 7a rises, the reflector 62 gradually rises, and the distance detected by the sensor 5 gradually increases, that is, the distance between the sensor 5 and the reflector 62 gradually increases, and the oil leaks more and more, so that the continuous situation of the oil leak can be judged by the detection of this kind of value, providing a more accurate judgment idea. When the floating ring 63 rises to the maximum height, the hydraulic oil flows out from the overflow port 73 into the filter cartridge 77 to achieve filtering and recovery. At this time, the detection reaches the maximum value, and manual intervention is required to handle the oil leak and the leak location.

[0040] Furthermore, the inner diameter of the floating ring 63 is larger than the outer diameter of the inner tube 71, or the outer diameter of the floating ring 63 is smaller than the inner diameter of the mounting tube 7. In this way, after the oil enters the floating cavity 7a from the oil inlet 73, it will flow down from the outer wall or inner wall of the floating ring 63 to the bottom of the floating cavity 7a, thereby driving the floating ring 63 to rise.

[0041] Furthermore, at least one push rod 64 is arranged on the bottom circumference of the floating ring 63, and preferably three push rods are arranged in the present invention. A partition 75 is arranged between the mounting tube 7 and the inner tube 71, and a conical valve port 78 is provided on the partition 75 to be connected with the push rod 64. The bottom end of the partition 75 constitutes a mounting chamber 7c, and a one-way valve is arranged in the mounting chamber 7c. The one-way valve includes a spring 782 arranged in the mounting chamber 7c and a valve body 781 connected to the spring 782. The valve body 781 is close to the conical valve port 78 to achieve sealing, that is, when the oil leaks, the conical valve port 78 is closed, so that the liquid level in the floating chamber 7a will rise, and the floating ring 63 will rise, and the oil leakage detection can be realized. The outer diameter of the push rod 64 is smaller than the inner diameter of the conical valve port 78; the bottom circumference of the inner tube 71 is provided with a plurality of discharge ports 76 connected with the mounting chamber 7c. Under normal circumstances, the lower end of the push rod 64 extends into the conical valve port 78, and the bottom end of the push rod 64 is set close to the valve body 781. The weight of the floating ring 63 and the like is not enough to push the valve body 781 to open the conical valve port 78. The floating ring 63 is at a certain distance from the bottom wall of the floating chamber 7a. When the oil leaks, it reaches the floating chamber 7a, which will drive the floating ring 63 and the floating rod 6 to rise, and finally the oil overflows from the overflow port 74. After the oil leakage detection is completed, the oil in the floating chamber 7a needs to be emptied. In this case, it is only necessary to press the floating rod 6 downward, the floating ring 63 descends, the push rod 64 pushes the valve body 781 downward, and the spring 782 is compressed, thereby opening the conical valve port 78. Since the outer diameter of the push rod 64 is smaller than the inner diameter of the conical valve port 78, the oil flows down from the conical valve port 78 to the installation chamber 7c, and finally flows into the filter cartridge 77 through the rear discharge port 76 to achieve the filtering and recovery operation.

[0042] When a hydraulic oil leak is detected, the sensor 5 can feed back to the control system and automatically alarm. For subsequent processing, it is only necessary to manually press the float rod 6 to drive the float ring 63 to descend, and the push rod 64 pushes the one-way valve to open, so that the leaked hydraulic oil in the float chamber 7a flows into the installation chamber 7c, and flows from the drain port 76 to the filter cartridge 77 for filtration and recovery. In this way, the leaked oil in the float chamber 7a can be completely drained and emptied. After the leakage point is repaired, the detection mechanism can be put back into operation to perform oil leakage detection without disassembling the detection mechanism, which is convenient and quick.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydraulic station oil leakage detection device, comprising a motor, a hydraulic pump and a valve assembly arranged on a hydraulic oil tank, characterized in that : A rectangular oil baffle is provided at the upper end of the hydraulic oil tank, and the motor, hydraulic pump and valve assembly are arranged inside the oil baffle; a refueling port is provided at the upper part of the hydraulic oil tank, and a removable oil leakage detection mechanism is provided in the refueling port; The oil leakage detection mechanism comprises a mounting cylinder, a cover body, a floating rod and a sensor. An inner cylinder is arranged inside the mounting cylinder, a filter cylinder is integrally extended from the bottom of the inner cylinder, a floating cavity is formed between the mounting cylinder and the inner cylinder, a plurality of oil inlets are arranged on the circumference of the mounting cylinder, a plurality of overflow ports are arranged on the circumference of the inner cylinder, and the height of the overflow port is lower than the height of the oil inlet port; A sensor is arranged at the upper end of the cover body, a positioning column is extended from the bottom of the cover body, the positioning column is threadedly connected to the inner wall of the inner tube, a limiting groove is arranged on the cover body, and the floating rod is slidably arranged in the limiting groove; a floating ring is arranged at the bottom end of the floating rod, and the floating ring is arranged in the floating cavity; The float rod is provided with a strip-shaped through groove along the height direction, and a reflective plate for shielding and reflecting the sensor signal is arranged at the bottom end of the through groove. When oil leaks, the oil enters the floating cavity through the oil inlet, thereby driving the float rod to move upward so that the reflective plate and the signal transmitting end of the sensor face each other.

2. The hydraulic station oil leakage detection device according to claim 1, characterized in that: The outer wall of the mounting tube is provided with a threaded portion, and the refueling port is a stepped hole. The stepped hole has three sections of through holes with successively decreasing diameters from the outside to the inside of the hydraulic oil tank. The threaded portion is threadedly connected to the inner wall of the through hole in the outer section of the refueling port, and the outer wall of the mounting tube is in close contact with the inner wall of the through hole in the inner section of the refueling port.

3. The hydraulic station oil leakage detection device according to claim 2 is characterized in that: A plurality of confluence grooves are arranged at the upper end of the hydraulic oil tank, one end of the confluence grooves extends toward the refueling port, a drainage groove is arranged at the end of the confluence grooves, and the drainage grooves are connected to the through holes in the middle section of the refueling port.

4. The hydraulic station oil leakage detection device according to claim 1, characterized in that: The reflecting plate is arranged obliquely in the through slot.

5. The hydraulic station oil leakage detection device according to claim 1, characterized in that: The inner diameter of the floating ring is larger than the outer diameter of the inner cylinder, or the outer diameter of the floating ring is smaller than the inner diameter of the mounting cylinder.

6. The hydraulic station oil leakage detection device according to claim 1, characterized in that: At least one push rod is arranged on the circumference of the bottom end of the floating ring, a partition is arranged between the mounting tube and the inner tube, a conical valve port connected to the push rod is opened on the partition, the bottom end of the partition constitutes a mounting cavity, a one-way valve is arranged in the mounting cavity, the one-way valve includes a spring arranged in the mounting cavity and a valve body connected to the spring, the valve body is close to the conical valve port, the outer diameter of the push rod is smaller than the inner diameter of the conical valve port; a plurality of discharge ports connected to the mounting cavity are opened on the circumference of the bottom end of the inner tube.

7. The hydraulic station oil leakage detection device according to claim 3, characterized in that: The confluence grooves are symmetrically arranged on both sides of the motor and the hydraulic pump. The interfaces on both sides of the hydraulic pump are respectively connected with an oil outlet pipe and an oil inlet pipe. The oil inlet pipe is connected to the inside of the hydraulic oil tank, and the oil outlet pipe is connected to the valve assembly.

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