Constant-pressure hydraulic device of wall jacking oil cylinder of bolting and grouting all-in-one machine

Abstract

The utility model belongs to the technical field of hydraulic equipment, and particularly relates to a constant-pressure hydraulic device of a wall-jacking oil cylinder of a bolting-grouting all-in-one machine, which comprises an overturning frame of the bolting-grouting all-in-one machine and the wall-jacking oil cylinder, a wall-jacking valve block and a hydraulic lock valve block are further arranged on the overturning frame, a hydraulic inlet is arranged on one side of the wall-jacking valve block, and a hydraulic outlet is arranged on the other side of the wall-jacking valve block. A constant-pressure oil way is connected between the hydraulic inlet and the hydraulic outlet, a switching valve and a pressure reducing valve are sequentially connected to the constant-pressure oil way in series from front to back according to the flowing direction of hydraulic oil, the switching valve is connected to the hydraulic inlet, the hydraulic inlet is connected to a hydraulic system for supplying the hydraulic oil, and an oil outlet of the pressure reducing valve is connected to the hydraulic outlet. The hydraulic outlet is connected to an ejection oil port of the wall-jacking oil cylinder, and the hydraulic lock valve block is connected between the ejection oil port and the return oil port of the wall-jacking oil cylinder. The working principle and the valve block design of the constant-pressure hydraulic device are relatively simple, but the stable pressure of the wall jacking oil cylinder can be effectively ensured, and the working safety of the wall jacking oil cylinder is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydraulic equipment technical field, concretely relates to a constant pressure hydraulic device of roof wall oil cylinder of anchor injection integrated machine. BACKGROUND

[0002] Anchor injection integrated machine (referred to as anchor injection integrated machine, also known as anchor injection platform car) is a kind of construction equipment widely used in engineering construction, and is suitable for drilling anchor rod hole, anchor rod installation, grouting, reinforcing mesh installation and other processes in tunnel and underground construction.

[0003] The turnover frame of anchor injection platform car is mainly used to bear rock drill mechanism assembly, anchor rod mechanism assembly, resin conveying mechanism assembly and anchor rod bin mechanism assembly and other multiple stations in the construction process, and the roof wall oil cylinder is arranged on the turnover frame of anchor injection integrated machine, and the roof wall oil cylinder is hinged to the turnover frame, and the roof wall oil cylinder needs to keep always in the state of being in close contact with the tunnel wall during operation, and keeps stable support with the wall.

[0004] In order to keep the stability and safety of the roof wall oil cylinder, constant pressure valve block device needs to be installed to ensure that the pressure of the roof wall oil cylinder is constant during work, and then multiple station switching is realized through rotating shaft to complete drilling, anchor rod installation and other switching to ensure the construction efficiency and construction period of tunnel construction. However, the existing anchor injection platform car hydraulic system is relatively complex, the function design of hydraulic valve block is not perfect, the constant pressure performance is not ideal, the stability of the roof wall oil cylinder is deficient, and there is certain safety hazard in the working process of anchor injection integrated machine. UTILITY MODEL CONTENTS

[0005] In view of the above situation, the utility model provides a constant pressure hydraulic device of roof wall oil cylinder of anchor injection integrated machine, which can effectively ensure the pressure stability of roof wall oil cylinder and improve the safety of anchor injection integrated machine working process.

[0006] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0007] A constant pressure hydraulic device of roof wall oil cylinder of anchor injection integrated machine, comprising the turnover frame of anchor injection integrated machine and roof wall oil cylinder, the roof wall oil cylinder is hingedly installed on the turnover frame, the roof wall valve block and hydraulic lock valve block are further arranged on the turnover frame, one side of the roof wall valve block is provided with hydraulic inlet, the other side is provided with hydraulic outlet, and constant pressure oil circuit is connected between the hydraulic inlet and hydraulic outlet.

[0008] According to the flow direction of hydraulic oil, the switching valve and pressure reducing valve are connected in series from front to back on the constant pressure oil circuit, the switching valve is connected to the hydraulic inlet, the hydraulic inlet is connected to the hydraulic system for supplying hydraulic oil, the oil outlet of the pressure reducing valve is connected to the hydraulic outlet, and the hydraulic outlet is connected to the top oil outlet of the roof wall oil cylinder, for providing constant hydraulic pressure for the roof wall oil cylinder.

[0009] The hydraulic lock valve block is connected between the ejection oil outlet and the back-off oil outlet of the top wall oil cylinder, and is used for locking the hydraulic pressure on both sides of the top wall oil cylinder piston.

[0010] Preferably, the hydraulic lock valve block adopts a tubular hydraulic control check valve, the upper end of the valve body is provided with a first oil port and a second oil port, a main hole is arranged in the middle of the valve body, a valve core is arranged in the main hole, and a set of check devices is arranged at the left and right ends of the valve body, and the third oil port and the fourth oil port are arranged correspondingly.

[0011] Preferably, the switching valve adopts a two-position three-way electromagnetic valve, has an inlet end and two outlet ends, the inlet end is connected with the hydraulic inlet, and the first outlet end is connected with the oil inlet of the pressure reducing valve.

[0012] Further, a throttle valve is arranged between the hydraulic inlet and the inlet end of the switching valve, and is mainly used for adjusting the oil inlet amount of the hydraulic inlet of the top wall valve block.

[0013] Preferably, the pressure reducing valve is an overflow pressure reducing valve, adopts a pilot type pressure reducing valve, and the opening degree of the opening and closing element in the valve body is controlled to adjust the flow of the hydraulic oil and reduce the pressure of the hydraulic oil.

[0014] Further, a recovery oil path is arranged in the top wall valve block, the recovery oil path is connected to a recovery oil tank at the tail end, and the second outlet end of the switching valve is connected to the recovery oil path.

[0015] Further, an overflow valve is arranged between the constant pressure oil path at the oil outlet of the pressure reducing valve and the recovery oil path. Preferably, the overflow valve adopts a direct-acting overflow valve. The hydraulic oil discharged by the pressure reducing valve and the overflow valve can flow back to the recovery oil tank through the recovery oil path.

[0016] Further, a pressure sensor is arranged on the constant pressure oil path at the hydraulic outlet, and is used for detecting the outlet pressure of the hydraulic outlet of the top wall valve block. Preferably, the pressure sensor is electrically connected with the electrical control system of the anchor grouting trolley hydraulic system.

[0017] The utility model also includes other components which can make it normal use, all are conventional means in the art, in addition, the device or component which is not added in the utility model, such as: throttle valve, two-position three-way electromagnetic valve, overflow pressure reducing valve, overflow valve, hydraulic lock valve block and anchor grouting trolley hydraulic system and its electrical control system etc., all adopt prior art in the art.

[0018] The utility model has the advantages as follows:

[0019] The constant pressure hydraulic device provided by this utility model has a relatively simple working principle and valve block design, but it has excellent constant pressure performance. It can effectively ensure the pressure stability of the top wall cylinder and ensure that the top wall cylinder always remains in a tight state during tunnel construction, thereby improving the safety factor of the integrated anchoring and grouting machine. This hydraulic device can also be applied to other hydraulic engineering machinery and equipment, and has good applicability. Attached Figure Description

[0020] Fig. 1 This is a schematic diagram of the mechanical structure of the tilting frame of the integrated anchor injection machine in the embodiment.

[0021] Fig. 2 This is a schematic diagram of the oil circuit connection of the constant pressure hydraulic device in the embodiment. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0023] Example

[0024] like Figs. 1-2 As shown, a constant pressure hydraulic device for the top wall cylinder of an integrated anchoring and injection machine includes a tilting frame 1 and a top wall cylinder 2 of the integrated anchoring and injection machine. The top wall cylinder is hinged to the tilting frame, and the tilting frame is also provided with a top wall valve block 3 and a hydraulic lock valve block 4.

[0025] The top wall valve block is provided with a hydraulic inlet 301 on one side and a hydraulic outlet 302 on the other side. A constant pressure oil circuit 303 connects the hydraulic inlet and the hydraulic outlet. According to the flow direction of the hydraulic oil, a switching valve 304 and a pressure reducing valve 305 are connected in series from front to back on the constant pressure oil circuit. The switching valve is connected to the hydraulic inlet, which is connected to the hydraulic system (not shown in the figure) that supplies hydraulic oil. The outlet of the pressure reducing valve is connected to the hydraulic outlet. The hydraulic outlet is connected to the top outlet of the rodless chamber of the top wall cylinder through a rubber hose to provide a constant hydraulic pressure to the top wall cylinder.

[0026] The hydraulic lock valve block is connected between the top outlet port 401 and the return port 402 of the top wall cylinder, and is used to lock the hydraulic pressure on both sides of the piston of the top wall cylinder.

[0027] The hydraulic lock valve block adopts V0190 type pipe type hydraulic control check valve, a main hole is arranged between the valve bodies, a valve core is arranged in the main hole, a first oil port 120 and a second oil port 130 are arranged at the upper end of the valve body, the first oil port and the second oil port are communicated with the main hole, a set of check devices are arranged at the left and right ends of the valve body, a third oil port 213 is arranged on the check device at the left end of the valve body, a fourth oil port 214 is arranged on the check device at the right end of the valve body, the third oil port is communicated with the first oil port, and the fourth oil port is communicated with the second oil port. The distal ends of the third oil port and the fourth oil port are connected to the recovery oil tank 310. The pipe type hydraulic control check valve adopts the prior art, and the specific structure is the same as that of the pipe type hydraulic control check valve disclosed in the patent document with the publication number CN104747517A, and details are not described here.

[0028] The switching valve adopts a two-position three-way electromagnetic valve, has an inlet end and two outlet ends, and the inlet end is connected to the hydraulic inlet.

[0029] A throttle valve 306 is further arranged between the hydraulic inlet and the inlet end of the switching valve, and is mainly used for adjusting the oil inlet amount at the hydraulic inlet of the top wall valve block.

[0030] The pressure reducing valve is an overflow pressure reducing valve, adopts a pilot type pressure reducing valve, adjusts the flow of hydraulic oil by controlling the opening of the opening and closing element in the valve body, reduces the pressure of the hydraulic oil, and can still keep the outlet pressure within the set range under the condition that the hydraulic inlet pressure continuously changes.

[0031] A recovery oil path 308 is further arranged in the top wall valve block, and the distal end of the recovery oil path is connected to a recovery oil groove 309. The second outlet end of the switching valve is connected to the recovery oil path.

[0032] When the constant pressure oil path needs to be supplied with oil, the inlet end of the switching valve is communicated with the first outlet end, and the hydraulic oil coming from the hydraulic inlet is led to the pressure reducing valve. When the constant pressure oil path does not need to be supplied with oil, the switching valve can be switched to be communicated with the second outlet end, the hydraulic oil can be directly returned to the recovery oil groove, and the overflow port of the pressure reducing valve is connected to the recovery oil path.

[0033] An overflow valve 307 is further arranged between the constant pressure oil path at the oil outlet of the pressure reducing valve and the recovery oil path. The overflow valve adopts a direct-acting overflow valve. When the hydraulic oil pressure in the constant pressure oil path exceeds the set pressure threshold, the hydraulic oil discharged by the pressure reducing valve and the overflow valve can flow through the recovery oil path and return to the recovery oil groove.

[0034] The constant pressure oil way at the hydraulic outlet is also provided with a pressure sensor 311 for detecting the outlet pressure at the hydraulic outlet of the top wall valve block.

[0035] The technical scheme of the utility model is not limited by the above-mentioned specific embodiments, and many modifications and changes are obvious to those skilled in the art without deviating from the scope and spirit of the described embodiments, and any technical modification made within the spirit and principle of the utility model falls within the protection scope of the utility model.

Claims

1. A constant pressure hydraulic device of a top wall oil cylinder of an anchor-grouting integrated machine, comprising a turnover frame of the anchor-grouting integrated machine and a top wall oil cylinder, the top wall oil cylinder being hingedly installed on the turnover frame, characterized in that: The turnover frame is further provided with a top wall valve block and a hydraulic lock valve block, one side of the top wall valve block is provided with a hydraulic inlet, the other side is provided with a hydraulic outlet, a constant pressure oil way is connected between the hydraulic inlet and the hydraulic outlet, according to the flow direction of the hydraulic oil, a switching valve and a pressure reducing valve are connected in series on the constant pressure oil way from front to back, the switching valve is connected to the hydraulic inlet, the hydraulic inlet is connected to a hydraulic system for supplying hydraulic oil, the oil outlet of the pressure reducing valve is connected to the hydraulic outlet, the hydraulic outlet is connected to the top oil outlet of a top wall oil cylinder for providing constant hydraulic pressure for the top wall oil cylinder, the hydraulic lock valve block is connected between the top oil outlet and the back-off oil outlet of the top wall oil cylinder for locking the hydraulic pressure on both sides of the top wall oil cylinder piston.

2. The constant pressure hydraulic device of the top wall oil cylinder of the anchor and note all-in-one machine according to claim 1, characterized in that: The switching valve is a two-position three-way electromagnetic valve, the inlet end of the switching valve is connected to the hydraulic inlet, and the first outlet end of the switching valve is connected to the oil inlet of the pressure reducing valve.

3. The constant pressure hydraulic device of the top wall oil cylinder of the anchor and note all-in-one machine according to claim 2, characterized in that: A throttle valve is further arranged between the hydraulic inlet and the inlet end of the switching valve.

4. The constant pressure hydraulic device of the top wall oil cylinder of the anchor and note all-in-one machine according to claim 3, characterized in that: The pressure reducing valve is an overflow pressure reducing valve.

5. The constant pressure hydraulic device of the top wall oil cylinder of the anchor and note all-in-one machine according to claim 4, characterized in that: A recovery oil way is arranged in the top wall valve block, the second outlet end of the switching valve is connected to the recovery oil way, and the overflow port of the pressure reducing valve is connected to the recovery oil way.

6. The constant pressure hydraulic device of the top wall oil cylinder of the anchor and note all-in-one machine according to claim 5, characterized in that: An overflow valve is further arranged between the constant pressure oil way at the oil outlet of the pressure reducing valve and the recovery oil way; the overflow valve is a direct-acting overflow valve.

7. The constant pressure hydraulic device of the top wall oil cylinder of the anchor and note all-in-one machine according to claim 6, characterized in that: A pressure sensor is further installed on the constant pressure oil way at the hydraulic outlet.

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