High protection amplitude cylinder for rock grab

Abstract

The utility model provides a kind of high protection amplitude cylinder for rock grabber, including cylinder body, front cylinder cover subassembly, piston rod subassembly, sensing component and joint protection component;The sensing component is arranged in the internal cavity of the cylinder body, for non-contact detection displacement of the piston rod subassembly;The joint protection component is connected with the sensing component, for protecting signal output cable.The utility model embeds sensor in the internal cavity of cylinder tail, magnetic ring is integrated in piston rod subassembly, and displacement is detected by non-contact magnetic induction;It can output piston rod displacement in real time, perceive the working condition of rock grabber boom, while it can completely isolate the physical damage of blasting flyrock and dust to sensor, use hydraulic oil medium to buffer shock wave, improve sensor life;Adopt split type hoop fixed welding joint, support multi-angle adjustment and quick disassembly, adapt to different installation scene;Outer wrapping rubber tube protects signal cable, and rely on compressive strength to resist flyrock impact and shock wave.

Description

Technical Field

[0001] This utility model belongs to the technical field of vertical shaft construction equipment, specifically a high-protection variable amplitude hydraulic cylinder for rock grabbers. Background Technology

[0002] A typical work cycle of shaft excavation includes processes such as rock drilling, blasting, rock grabbing and loading, hoisting out of the shaft, cleaning the bottom, and shaft wall support. Among these, rock grabbing and loading is the most arduous and time-consuming process, generally accounting for about 50 to 60% of the cycle time, and is the main factor affecting the speed of shaft excavation.

[0003] The rock grabbing and loading process involves using a rock grabbing machine to grab loose rock fragments after blasting, placing the grabbed rock fragments in a bucket, and then using the bucket to lift the rock fragments out of the shaft.

[0004] The existing vertical shaft rock grabbing and slag removal construction generally adopts a center rotary rock grabbing machine. This equipment is equipped with four working mechanisms: lifting / lowering, rotation, luffing, and opening / closing of the grab bucket. The entire equipment is powered only by compressed air and has no electrical components, giving it a natural explosion-proof advantage in blasting dust and high humidity environments.

[0005] The luffing action of the rock grabber is achieved by using an air-driven hydraulic pressurization system to drive a conventional hydraulic cylinder to raise and lower the boom. However, existing luffing cylinders have two major flaws:

[0006] 1. The hydraulic cylinder only has basic hydraulic drive function and cannot output piston rod displacement signal in real time, which makes the posture perception of the rock grabber boom completely dependent on human experience, hindering intelligent upgrades.

[0007] 2. Traditional hydraulic cylinders are not designed with protective structures for explosive environments. Flying rocks and shock waves generated by vertical shaft blasting can directly damage external sensors, while dust intrusion can easily cause electrical short circuits. Utility Model Content

[0008] The purpose of this invention is to provide a high-protection variable amplitude hydraulic cylinder for rock grabbers that can output the piston rod extension and retraction stroke in real time and can be used reliably in the environment of exploding flying rocks and shock waves.

[0009] The high-protection variable amplitude hydraulic cylinder for rock grabbers provided by this utility model includes a cylinder body, a front cylinder head assembly, a piston rod assembly, a sensing assembly, and a joint protection assembly; the sensing assembly is disposed in the internal cavity of the cylinder body and is used for non-contact detection of the displacement of the piston rod assembly; the joint protection assembly is connected to the sensing assembly and is used to protect the signal output cable.

[0010] In one embodiment of the above-mentioned hydraulic cylinder, the sensing component includes a sensor; a magnetic ring is provided on the piston rod assembly, and the sensor is used to detect changes in the position of the magnetic ring.

[0011] In one embodiment of the above-mentioned hydraulic cylinder, the cylinder body includes a cylinder tail and a cylinder barrel; one end of the cylinder tail is provided with an ear-type pin hole for hinged external support, and the other end is welded to the cylinder barrel; the sensing component is built into the cavity of the cylinder tail, and the sensor is immersed in hydraulic oil.

[0012] In one embodiment of the aforementioned hydraulic cylinder, the joint protection assembly includes a hose and a clamp structure; the hose is a double-layer steel wire braided structure with an internal sensor cable channel and an external pressure-resistant steel wire layer; the clamp structure includes a half-clamp A and a half-clamp B, which are fixed to the cylinder body by bolts and nuts.

[0013] In one embodiment of the aforementioned hydraulic cylinder, the sensing component further includes a set screw; the set screw passes through the side hole at the cylinder tail and locks into the groove of the sensor, cooperating with the O-ring to achieve axial fixation of the sensor and high-pressure hydraulic oil sealing.

[0014] In one embodiment of the aforementioned hydraulic cylinder, the front cylinder head assembly includes a front cylinder head and a plurality of sealing elements; the front cylinder head is threadedly connected to the cylinder barrel; the sealing elements include a shaft guide ring, a shaft Glyd ring, a Y-type sealing ring, and a dustproof ring arranged sequentially from the inside to the outside.

[0015] In one embodiment of the above-mentioned hydraulic cylinder, the piston rod assembly includes a rod body, a piston, and a magnetic ring; one end of the rod body is welded to the piston, and the other end is welded to a rod head with an ear-type pin hole structure; the magnetic ring is interference-fitted into the magnetic ring groove of the piston.

[0016] In one embodiment of the above-mentioned hydraulic cylinder, the cylinder body further includes an internal thread direct one and an internal thread direct two; the internal thread direct one is welded to the front oil hole of the cylinder as an oil inlet, and the internal thread direct two is welded to the rear oil hole of the cylinder as an oil return port.

[0017] In one embodiment of the above-mentioned hydraulic cylinder, a plug and a washer are fitted into the side hole at the cylinder tail.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. The sensor is embedded in the internal cavity of the cylinder tail, and the magnetic ring is integrated into the piston rod assembly. Displacement is detected through non-contact magnetic induction. It can output the piston rod displacement in real time, sense the working status of the rock grabber boom, and completely isolate the sensor from the physical damage of flying rocks and dust from blasting. The hydraulic oil medium is used to buffer the shock wave and improve the sensor life.

[0020] 2. It adopts a split clamp to fix the welding joint, which supports multi-angle adjustment and quick disassembly and assembly, and is suitable for different installation scenarios; the outer layer is wrapped with rubber tubing to protect the signal cable, and its compressive strength can withstand the impact of flying stones and shock waves.

[0021] 3. The sensor body is locked with a set screw to eliminate sensor displacement error caused by high-frequency vibration of the hydraulic cylinder; at the same time, multiple seals prevent high-pressure oil leakage and ensure signal stability. Attached Figure Description

[0022] Figure 1 This is a front view structural diagram of an embodiment of the present invention.

[0023] Figure 2 for Figure 1 A top-view structural diagram.

[0024] Figure 3 for Figure 1 A side view structural diagram.

[0025] Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure. Detailed Implementation

[0026] The relevant technical solutions will now be clearly and completely described with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0027] like Figure 1 and Figure 2 As shown, the high-protection variable amplitude hydraulic cylinder for rock grabber disclosed in this embodiment includes a cylinder body 1, a joint protection assembly 2, a front cylinder head assembly 3, a piston rod assembly 4, and a sensing assembly 5.

[0028] The cylinder body 1 is the core pressure-bearing component, hinged to the external support through the lug pin hole of the cylinder tail 11; the rod head 45 of the piston rod assembly 4 is connected to the rock grabber boom through the lug pin hole; the sensing component 5 is completely built into the cavity of the cylinder tail 11, and its signal output terminal is led out through the connector protection component 2. This variable amplitude cylinder can output the piston rod displacement in real time and resist explosive impact.

[0029] The cylinder body 1 serves as the assembly base for the hydraulic cylinder piston rod assembly 5 and other components, while also providing an oil storage space for the hydraulic cylinder's operation. The cylinder body includes a cylinder tail 11, an internal thread straight rod 12, a cylinder barrel 13, an internal thread straight rod 2 14, a plug 15, and a washer 16.

[0030] One end of the cylinder tail 11 is connected to an external support via an ear-type pin hole, while the other end is a cylindrical structure. The cylindrical section has a sensor mounting cavity inside, and sensor data line output holes and set screw mounting holes on the side. The end face is welded to the cylinder barrel 13.

[0031] The cylinder barrel 13 is a thick-walled seamless steel pipe with two oil holes at the front and rear. The internal thread 12 is directly welded to the oil hole at the front of the cylinder barrel as the oil inlet; the internal thread 24 is directly welded to the oil outlet at the rear of the cylinder barrel as the oil return port.

[0032] The plug 15 and washer 16 are fitted into the side hole of the cylinder tail 11 to prevent the set screw 54 from falling off.

[0033] like Figure 3 As shown, the joint protection assembly 2 includes a half clamp A 21, a half clamp B 22, a straight connector 23, a hose 24, a bolt 25, and a nut 26.

[0034] Half-clamp A 21 and half-clamp B 22 are tightly fixed to the cylindrical section of cylinder tail 11 by two pairs of bolts 25 and nuts 26.

[0035] The straight connector 23 is a welded hydraulic straight connector, with one end welded to the semi-clamp A 21; the other end is an external thread, which is threaded to the hose 24.

[0036] The hose 24 is made of double-layer steel wire braid, with an internal sensor cable channel and an external pressure-resistant steel wire layer; the head of the hose is an internal connector thread that connects to a straight connector, and the end connects to an external controller.

[0037] like Figure 4 As shown, the front cylinder head assembly 3 includes a front cylinder head 31, an O-ring 32, a shaft guide ring 33, a shaft Glyd ring 34, a Y-ring 35, and a dust seal 36.

[0038] The front cylinder head 31 is threaded to the end of the cylinder barrel 13 away from the cylinder tail, and an O-ring 32 is provided on the threaded section; a notch is provided on the outer cylindrical surface for easy disassembly.

[0039] The front cylinder head 31 has a through hole in the center along the length direction. The through hole is provided with a sealing element mounting groove, in which a shaft guide ring 33, a shaft Glyd ring 34, a Y-type sealing ring 35 and a dustproof ring 36 are installed sequentially from the inside to the outside, together to achieve the guidance and dynamic sealing of the piston rod 44.

[0040] The piston rod assembly 4 is the moving part of this variable amplitude cylinder, including piston 41, guide ring 42 for bore, Gladley ring 43 for bore, rod body 44, rod head 45, elastic retaining ring for bore 46, spacer washer 47 and magnetic ring 48.

[0041] The rod body 44 is a hollow thick-walled steel tube, with a piston 41 welded to one end and a rod head 45 welded to the other end; the rod head has an ear-type pin hole structure and is connected to the outside.

[0042] A sealing guide groove is formed on the outer surface of the piston 41, and a guide ring 42 and a Glyd ring 43 for the bore are arranged in sequence in the groove; a magnetic ring groove is formed on the inner surface of the piston, and an elastic retaining ring 46, a spacer washer 47 and a magnetic ring 48 are arranged in sequence; the magnetic ring is interference-fitted in the magnetic ring groove and has a non-contact fit with the sensing component 50.

[0043] The sensing component 5 can output the displacement of this variable amplitude cylinder in real time with high precision, including connector 51, data line 52, sensor 53, set screw 54, O-ring seal 55, screw 56 and signal output cable 57.

[0044] The connector 51 is fixed to the outer wall of the cylinder tail 11 by screws 56 and connected to the sensor 53 via data cable 52; the sensor is built into the cylinder tail cavity and immersed in hydraulic oil, and the sensor housing has a groove for setting the O-ring seal 55.

[0045] The set screw 54 can pass through the side hole of the cylinder tail 11 and lock into another groove of the sensor 53, which, together with the O-ring seal 55, achieves axial fixation and high-pressure hydraulic oil sealing.

[0046] The signal output cable 57 and the connector 51 are connected by a male and female plug-in type. The signal output cable passes through the double-layer steel wire braided rubber tube 24 and connects to the connector.

[0047] The working principle of this variable amplitude hydraulic cylinder is as follows:

[0048] 1. Displacement Detection: When the high-pressure oil pushes the piston 41, the magnetic ring 48 moves synchronously with the piston rod assembly 40. The sensor 53 detects the position of the magnetic ring 48 non-contactly through magnetic induction and outputs a displacement signal via the data line 52.

[0049] 2. Explosion protection: The sensor 53 is completely immersed in hydraulic oil, using oil damping to absorb the shock wave energy of the explosion during shaft construction; the double-layer steel wire braided hose 24 disperses the impact force of flying rocks through the high-strength steel wire layer; the set screw 54 forms a lock, suppressing the measurement error caused by the vibration of the hydraulic cylinder.

[0050] 3. Dynamic sealing: The multi-stage sealing combination of the front cylinder head assembly 30 prevents oil leakage, while the dust seal 36 isolates external dust.

[0051] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-protection variable amplitude cylinder for a rock grabber, characterized in that: It includes a cylinder block, a front cylinder head assembly, a piston rod assembly, a sensing assembly, and a connector protection assembly; the sensing assembly is disposed in the internal cavity of the cylinder block for non-contact detection of the displacement of the piston rod assembly; the connector protection assembly is connected to the sensing assembly and is used to protect the signal output cable.

2. The high-protection variable amplitude cylinder for rock grabbers as described in claim 1, characterized in that: The sensing component includes a sensor; a magnetic ring is provided on the piston rod assembly, and the sensor is used to detect changes in the position of the magnetic ring.

3. The high-protection variable amplitude cylinder for rock grabbers as described in claim 2, characterized in that: The cylinder body includes a cylinder tail and a cylinder barrel; one end of the cylinder tail is provided with an ear-type pin hole for hinged external support, and the other end is welded to the cylinder barrel; the sensing component is built into the cavity of the cylinder tail, and the sensor is immersed in hydraulic oil.

4. The high-protection variable amplitude cylinder for rock grabbers as described in claim 1, characterized in that: The joint protection assembly includes a hose and a clamp structure; the hose is a double-layer steel wire braided structure with an internal sensor cable channel and an external pressure-resistant steel wire layer; the clamp structure includes a half clamp A and a half clamp B, which are fixed to the cylinder body by bolts and nuts.

5. The high-protection variable amplitude cylinder for rock grabbers as described in claim 3, characterized in that: The sensing assembly also includes a set screw; the set screw passes through the side hole at the cylinder tail and locks into the groove of the sensor, cooperating with the O-ring to achieve axial fixation of the sensor and high-pressure hydraulic oil sealing.

6. The high-protection variable amplitude cylinder for rock grabbers as described in claim 1, characterized in that: The front cylinder head assembly includes a front cylinder head and multiple sealing elements; the front cylinder head is threadedly connected to the cylinder barrel; the sealing elements include a shaft guide ring, a shaft Glyd ring, a Y-type sealing ring, and a dust seal ring arranged sequentially from the inside to the outside.

7. The high-protection variable amplitude cylinder for rock grabbers as described in claim 2, characterized in that: The piston rod assembly includes a rod body, a piston, and a magnetic ring; one end of the rod body is welded to the piston, and the other end is welded to a rod head with an ear-type pin hole structure; the magnetic ring is interference-fitted into the magnetic ring groove of the piston.

8. The high-protection variable amplitude cylinder for rock grabbers as described in claim 1, characterized in that: The cylinder body also includes an internal thread direct one and an internal thread direct two; the internal thread direct one is welded to the front oil hole of the cylinder as an oil inlet, and the internal thread direct two is welded to the rear oil hole of the cylinder as an oil return port.

9. The high-protection variable amplitude cylinder for rock grabbers as described in claim 5, characterized in that: The side hole at the cylinder tail is fitted with a plug and a gasket.

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