A hydraulic outrigger detection device and detection circuit

Abstract

The invention discloses a hydraulic outrigger detection device and a detection circuit. The detection device includes a normally closed induction switch and a magnet. The normally closed induction switch is fixedly installed in a long hole on the side of the base; the magnet is arranged at the top of the piston rod. The detection circuit includes two circuits, one of which connects four normally closed induction switches in parallel, and then connects a km1 relay switch, an SB2 control switch and an alarm light in series; the other circuit connects an SB1 control switch, a fuse and a KM1 relay in series, and a liquid level relay is connected in parallel at both ends of the KM1 relay. When the normally closed induction switch senses the magnet, the invention determines that the outrigger is in place, otherwise it keeps alarming. At the same time, in order to prevent false alarms in the working state, a liquid level relay is arranged on the oil tank, and the oil tank liquid level is used to determine whether the outrigger is in the working state, and the alarm device is controlled by the KM1 relay. The induction device is simple and practical, not easily damaged by external interference, and has a long service life.

Description

Technical Field

[0001] The invention relates to the field of vehicle-mounted hydraulic outriggers, and in particular to a hydraulic outrigger detection device and a detection circuit. Background Art

[0002] The existing vehicle-mounted hydraulic outrigger system mainly serves as an auxiliary support for the vehicle, increasing the stability of the work vehicle during operation; however, after the operation is completed, during the process of retracting and resetting the outriggers, or during transportation, the outriggers may not be retracted due to operator misoperation or equipment failure, causing the outriggers to fail to be retracted during transportation. As a result, the outriggers that match the relevant outrigger equipment may not be retracted due to the small ground clearance of the outriggers during transportation, which may easily lead to contact with related objects and the risk of collision. This poses a great risk to transportation safety and personal safety. The conventional technical solution is to add a travel switch or a contact switch to the external outrigger and the outrigger disc to detect the distance and contact point of the outrigger disc when it is retracted, but it often cannot adapt to harsh environmental requirements. For example, in the event of floods or muddy roads, the contact switch or travel switch installed externally on the outrigger disc often fails, is damaged and falls, and cannot be detected; secondly, a built-in high-pressure resistant inductive proximity switch is used, which has high precision and good reliability. It is resistant to high pressure, but due to the large shape and structure of the equipment itself, large customized holes are required, resulting in high cost for leg modification and difficult maintenance, which is difficult to be accepted by users. Therefore, it is necessary to provide a practical, reliable and effective leg receiving device that can adapt to various working conditions and its perfect detection, protection and control methods. Summary of the invention

[0003] The purpose of the present invention is to provide a practical and effective detection device for the hydraulic outriggers being received in place, which can adapt to various working conditions and has small size, simple structure and is easy to maintain.

[0004] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0005] A hydraulic outrigger detection device is arranged in a hydraulic outrigger, the hydraulic outrigger includes a base, a piston rod and a cylinder barrel, a piston is mounted on the top of the piston rod, the piston and the piston rod form an oil cylinder assembly, and are placed in the cylinder barrel, the detection device includes: a normally closed induction switch and a magnet, the normally closed induction switch is a magnetic proximity switch, a long hole is opened on the side of the base, the normally closed induction switch is fixedly installed in the long hole; the magnet is arranged on the top of the piston rod.

[0006] Preferably, an annular boss is provided on the top of the piston rod, the magnet is fixedly provided in the annular boss, and a groove hole is provided in the center of the bottom of the base to cooperate with the annular boss.

[0007] Preferably, when the supporting legs are retracted, the annular boss of the piston rod is inserted into the groove hole, and there is an induction gap of 2-3 mm from the bottom of the groove hole.

[0008] Preferably, the base is manufactured from non-magnetic materials.

[0009] Preferably, the base is made of aluminum or 304 stainless steel.

[0010] Preferably, the depth of the long hole exceeds the radius of the base.

[0011] Preferably, the normally closed induction switch is locked and fixed by a locking screw provided on the top surface of the base.

[0012] A detection circuit of a hydraulic outrigger detection device, comprising a normally closed induction switch on four outriggers, a high liquid level electrode A, a common electrode B, a low liquid level electrode C, a hydraulic oil tank, a liquid level relay, an SB1 control switch, an alarm light, a fuse, an SB2 control switch, a chassis battery and a KM1 relay; the KM1 relay is provided with a km1 relay switch;

[0013] The positive pole of the chassis battery is divided into two paths. One path connects the normally closed induction switches on the four outrigger cylinders in parallel, and then connects the km1 relay switch, SB2 control switch and alarm light in series, and then returns to the negative pole of the chassis battery; the other path of the chassis battery connects the SB1 control switch, fuse and KM1 relay in series, and the liquid level relay is connected in parallel at both ends of the KM1 relay.

[0014] The liquid level relay leads to three input electrode signal feedbacks, namely high liquid level electrode A, common electrode B and low liquid level electrode C. A small relay K is provided on the circuit of the liquid level relay; the relay switch K of the small relay K is connected in series to the input end of the KM1 relay.

[0015] Preferably, the high liquid level electrode A, common electrode B and low liquid level electrode C are arranged on the side wall plate of the hydraulic oil tank in an order from top to bottom; the hydraulic interval between the high liquid level electrode A and the common electrode B is a normal liquid level, and the hydraulic interval between the low liquid level electrode C and the common electrode B is a low liquid level.

[0016] The present invention adopts a normally closed induction switch arranged in the base, and a magnet arranged on the piston head. When the normally closed induction switch senses the magnet, it is judged that the outrigger is in place, otherwise the alarm is kept. At the same time, in order to prevent false alarms in the working state, a liquid level relay is arranged on the oil tank, and the oil tank liquid level is used to judge whether the outrigger is in the working state, and the alarm device is controlled by the KM1 relay. The induction device of the present invention is simple and practical, not easily damaged by external interference, and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the hydraulic outrigger of the present invention.

[0018] Figure 2 It is a schematic diagram of the installation of the detection device of the present invention.

[0019] Figure 3 It is a schematic diagram of the detection circuit of the present invention.

[0020] In the figure, 1 is a normally closed induction switch, 2 is a magnet, 3 is a base, 5 is a piston rod, 6 is a cylinder, 7 is a locking screw, 8 is an oil cylinder assembly, 31 is a long hole, 32 is a groove hole, 101 is a high liquid level electrode A, 102 is a common electrode B, 103 is a low liquid level electrode C, 104 is a hydraulic oil tank, 105 is a liquid level relay, 106 is a SB1 control switch, 107 is a warning light, 108 is a fuse, 109 is a SB2 control switch, 112 is a km1 relay switch, 113 is a small relay K, and 114 is a relay switch K. DETAILED DESCRIPTION

[0021] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but the embodiments of the present invention are not limited thereto.

[0022] Figures 1 to 3 It is a preferred embodiment of the present invention. The hydraulic outrigger includes a base 3, a piston rod 5 and a cylinder barrel 6. The piston rod 5 is provided with a piston 4 on the top of the piston rod 5 in the form of an external thread. The piston 4 has a double-layer seal and together with the piston rod 5 forms an oil cylinder assembly 8, which is placed in the cylinder barrel 6. Through conventional outrigger manufacturing welding technology, the base 3 and the cylinder barrel 6 are welded together to form an outrigger oil cylinder.

[0023] The present invention is a reliable and effective detection device for detecting whether the hydraulic support leg is in place, which is arranged in the hydraulic support leg and includes a normally closed induction switch 1 and a magnet 2. The normally closed induction switch 1 is a magnetic proximity switch, which is sensed by the proximity of the magnet 2. Under normal conditions, the normally closed induction switch 1 is closed, and when the magnet 2 approaches, the normally closed induction switch 1 is disconnected; the normally closed induction switch 1 is placed in the base 3. In this embodiment, a long hole 31 is opened on the side of the base 3, and the depth of the long hole 31 exceeds the radius of the base 3. The normally closed induction switch 1 is placed in the long hole 31. A locking screw 7 is provided on the top surface of the base 3 for fixing the normally closed induction switch 1. After the normally closed induction switch 1 and the locking screw 7 are installed, silicone is used for waterproof sealing.

[0024] The magnet 2 is arranged at the top of the piston rod 5. In this embodiment, an annular boss (not shown in the figure) is arranged at the top of the piston rod 5. The induction magnet 2 is placed in the annular boss and is locked and fixed with stainless steel bolts. A groove hole 32 is arranged in the center of the bottom of the base 3. When the legs are retracted, the annular boss of the piston rod 5 can be inserted into the groove hole 32, but will not touch the bottom of the groove hole 32. A 2-3mm induction gap needs to be retained. After the normally closed induction switch 1 is inserted into the long hole 31, it is best for the induction head to be located directly below the groove hole 32. In order to ensure that the induction is not disturbed, the thickness between the long hole 31 and the bottom of the groove hole 32 should be relatively thin, while the strength of the base 3 needs to be ensured to ensure that the thickness can withstand the moving air pressure of the piston rod 5. The base 3 is made of non-magnetic inductive materials, preferably aluminum, 304 stainless steel, etc., to solve the problem of weak magnetism of the induction magnet 2.

[0025] Since the outrigger received position detection device is placed in the base 3 on the top of the outrigger oil cylinder, it will not be affected by the environment and related regional environmental conditions, is waterproof, mud-proof and collision-proof, and its service life is greatly improved. At the same time, it is convenient for maintenance and replacement.

[0026] The detection circuit of the present invention is as follows Figure 3 As shown, it includes a normally closed induction switch 1, a high liquid level electrode A101, a common electrode B102, a low liquid level electrode C103, a hydraulic oil tank 104, a liquid level relay 105, an SB1 control switch 106, an alarm light 107, a fuse 108, an SB2 control switch 109 (106 and 109 are wrongly labeled in the figure), a chassis battery 110 and a KM1 relay 111; in the figure, S1, S2, S3, and S4 are the normally closed induction switches 1 of the four legs. The KM1 relay 111 is provided with a km1 relay switch 112; the fuse 108 is a 30A fuse.

[0027] The chassis battery 110 provides a power source for the entire outrigger control system. The positive pole of the chassis battery 110 is divided into two paths. One path connects the normally closed induction switches 1 on the four outrigger oil cylinders in parallel, and then connects the km1 relay switch 112, SB2 control switch 109 and the alarm light 107 in series, and returns to the negative pole of the chassis battery 110; the normally closed induction switch 1 is connected in parallel, and the alarm light 107 will be turned on as long as one of the outriggers is not in place; the km1 relay switch 112 in series ensures the circuit is connected during the normal support of the outriggers, and prevents the alarm light 107 from flashing due to a false alarm caused by the outrigger extension state;

[0028] Another series connection of the chassis battery 110 is connected to the SB1 control switch 106, the fuse 108, and the KM1 relay 111 of the assembly leg, and the liquid level relay 105 is connected in parallel at both ends of the series connection branch of the KM1 relay 111.

[0029] The liquid level relay 105 leads to three input electrode signal feedbacks, namely the high liquid level electrode A101, the common electrode B102 and the low liquid level electrode C103. A small relay K113 is provided on the circuit of the liquid level relay 105; the relay switch K114 of the small relay K113 is connected in series to the input end of the KM1 relay 111.

[0030] The 3-way input electrodes of the liquid level relay 105 are arranged in order from top to bottom and are arranged on the side wall plate of the hydraulic oil tank 104. According to the conductive property of the liquid used by the liquid level relay 105, the hydraulic interval between the high liquid level electrode A101 and the common electrode B102 is the normal liquid level, and the hydraulic interval between the low liquid level electrode C103 and the common electrode B102 is the low liquid level. When the outrigger is in normal supporting operation, the rodless cavity of the outrigger begins to store hydraulic oil, and the oil level in the hydraulic oil tank 104 begins to drop. When it drops to the low liquid level interval, the internal relay K113 of the liquid level relay 105 is turned on and the switch is closed, the KM1 relay 111 is energized, the km1 relay switch 112 connected in series with the normally closed induction switch 1 is disconnected, and the alarm light 107 does not work, thereby solving the problem of false alarms under normal working conditions.

[0031] Since the power supply of the outrigger normally closed induction switch 1 is directly taken from the chassis power source of the external vehicle, the outrigger normally closed switch 1 is always in the power-on state as long as the vehicle key can be started. When the outrigger oil cylinder assembly 8 drops due to insufficient sealing of the outrigger system or outrigger pressure relief problem in the transportation state, the cab warning light 107 will flash to remind the driver that the outrigger has not been received in place and further receiving operation is required to check whether there is any problem with the system, solve the fault in advance, and ensure the safety of the driving staff.

[0032] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A hydraulic outrigger detection device, arranged in a hydraulic outrigger, the hydraulic outrigger comprising a base, a piston rod and a cylinder barrel, a piston is mounted on the top of the piston rod, the piston and the piston rod form a cylinder assembly, which is placed in the cylinder barrel, characterized in that: The detection device comprises: a normally closed induction switch and a magnet, wherein the normally closed induction switch is a magnetic proximity switch, a long hole is provided on the side of the base, and the normally closed induction switch is fixedly installed in the long hole; the magnet is arranged at the top end of the piston rod; An annular boss is arranged on the top of the piston rod, the magnet is fixedly arranged in the annular boss, and a groove hole is arranged at the center of the bottom of the base to cooperate with the annular boss; The detection circuit of the hydraulic outrigger detection device includes a normally closed induction switch on the four outriggers, a high liquid level electrode A, a common electrode B, a low liquid level electrode C, a hydraulic oil tank, a liquid level relay, an SB1 control switch, an alarm light, a fuse, an SB2 control switch, a chassis battery and a KM1 relay; the KM1 relay is provided with a km1 relay switch; The positive pole of the chassis battery is divided into two paths. One path connects the normally closed induction switches on the four outrigger cylinders in parallel, and then connects the km1 relay switch, SB2 control switch and alarm light in series, and then returns to the negative pole of the chassis battery; the other path of the chassis battery connects the SB1 control switch, fuse and KM1 relay in series, and the liquid level relay is connected in parallel at both ends of the KM1 relay. The liquid level relay leads to three input electrode signal feedbacks, namely high liquid level electrode A, common electrode B and low liquid level electrode C. A small relay K is provided on the circuit of the liquid level relay; the relay switch K of the small relay K is connected in series to the input end of the KM1 relay.

2. A hydraulic outrigger detection device according to claim 1, characterized in that: When the supporting legs are retracted, the annular boss of the piston rod is inserted into the groove hole, and there is an induction gap of 2-3 mm from the bottom of the groove hole.

3. A hydraulic outrigger detection device according to claim 1, characterized in that: The base is made of non-magnetic materials.

4. A hydraulic outrigger detection device according to claim 3, characterized in that: The base is made of aluminum or 304 stainless steel.

5. The hydraulic outrigger detection device according to claim 1, characterized in that: The depth of the long hole exceeds the radius of the base.

6. The hydraulic outrigger detection device according to claim 1, characterized in that: The normally closed induction switch is locked and fixed by a locking screw arranged on the top surface of the base.

7. The hydraulic outrigger detection device according to claim 1, characterized in that: The high liquid level electrode A, the common electrode B and the low liquid level electrode C are arranged on the side wall plate of the hydraulic oil tank in order from top to bottom; The hydraulic interval between the high liquid level electrode A and the common electrode B is a normal liquid level, and the hydraulic interval between the low liquid level electrode C and the common electrode B is a low liquid level.

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