A hydraulic control valve group and an integrated tool for breaking and opening holes

Abstract

The present invention discloses a hydraulic control valve group, which includes a valve body and an O-type center-position three-way four-way directional control valve, a two-way four-way directional control valve, and a Y-type center-position three-way four-way directional control valve arranged on the valve body. A main oil supply manifold and a return oil manifold are arranged in the valve body; the main oil supply manifold is respectively communicated with the oil supply ports of each directional control valve; the return oil manifold is respectively communicated with the return oil ports of each directional control valve; each directional control valve is further respectively provided with a first working oil port and a second working oil port. Thus, the hydraulic control valve group of the present invention greatly reduces pipeline connectors and realizes the use of multi-functional attachments without modifying the main oil circuit; the present invention also discloses a one-piece attachment for breaking and opening holes.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic control of construction machinery, and particularly to a hydraulic control valve group and an integrated breaking and opening tool. Background Art

[0002] China is a country with frequent earthquakes. Nowadays, most buildings are high-rise and multi-storey reinforced concrete buildings. Therefore, during the rescue process of large urban earthquake disasters, earthquake ruins often have a large number of crossbeams and precast slabs overlapping each other. Currently, during the rescue process, in the face of large obstacles, the main rescue methods are breaking and removing. Due to the complex on-site situation, when the location of the buried person is unknown, there is a risk of secondary collapse or falling objects causing secondary injuries to the trapped person during the breaking and removing of large obstacles. Therefore, based on the operating environment of earthquake rescue, it is necessary to design a multi-functional tool and its control system that not only has the function of rapid breaking but also can realize rapid opening without damaging the main structure of the operation site. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a hydraulic control valve group and a multi-functional tool.

[0004] To solve the above technical problem, the technical solution adopted by the present invention is as follows:

[0005] A hydraulic control valve group includes a valve body, an O-type center-position three-way four-way directional control valve, a two-way four-way directional control valve, and a Y-type center-position three-way four-way directional control valve. The O-type center-position three-way four-way directional control valve, the two-way four-way directional control valve, and the Y-type center-position three-way four-way directional control valve are all arranged on the valve body;

[0006] A supply oil main pipe and a return oil main pipe are arranged in the valve body. A supply oil joint communicated with the supply oil main pipe and a return oil joint communicated with the return oil main pipe are arranged on the valve body;

[0007] The supply oil main pipe is respectively communicated with the supply oil ports of the O-type center-position three-way four-way directional control valve, the two-way four-way directional control valve, and the Y-type center-position three-way four-way directional control valve;

[0008] The return oil main pipe is respectively communicated with the return oil ports of the O-type center-position three-way four-way directional control valve, the two-way four-way directional control valve, and the Y-type center-position three-way four-way directional control valve;

[0009] The O-type center-position three-way four-way directional control valve, the two-way four-way directional control valve, and the Y-type center-position three-way four-way directional control valve are respectively provided with a first working oil port and a second working oil port.

[0010] Compared with the prior art, the present invention has the following technical effects:

[0011] Greatly saves the use of pipelines, reduces the number of interfaces, and decreases the probability of equipment failure. It can support three actuators simultaneously without modifying the main oil circuit.

[0012] Furthermore, a pressure reducing valve is also provided on the valve body, and the pressure reducing valve is communicated with the main oil supply pipe.

[0013] Effectively controls the oil pressure in the oil circuit and avoids overloading and damaging the motor of the system.

[0014] Furthermore, a pressure measuring interface is also provided on the valve body, which is convenient for monitoring the oil pressure in the pipeline at any time and ensuring the stability of the oil circuit system.

[0015] A combined breaking and hole-opening attachment, comprising a connecting box body, a breaker, a swing oil cylinder, and a tunneler. The breaker and the swing oil cylinder are fixed on the connecting box body, the tunneler is arranged on the swing oil cylinder, and a hydraulic motor is arranged in the tunneler; a hydraulic control valve group as described above is arranged in the connecting box body;

[0016] The first working oil port and the second working oil port of the O-shaped center three-position four-way directional control valve are respectively communicated with the first pressure chamber and the second pressure chamber of the swing oil cylinder; the first working oil port and the second working oil port of the two-position four-way directional control valve are respectively communicated with the oil supply end and the oil return end of the breaker; the first working oil port and the second working oil port of the Y-shaped center three-position four-way directional control valve are respectively communicated with the oil supply end and the oil return end of the hydraulic motor of the tunneler.

[0017] Compared with the prior art, the present invention has the following technical effects:

[0018] This attachment integrates the functions of breaking and hole-opening. During the rescue process, when the trapped person is far from the obstacle, the breaking function can be used to quickly break and improve the rescue efficiency. When the trapped person is close to the obstacle, the hole-opening function can be used to quickly open a hole with the characteristics of low vibration, low noise, small damage, and small and uniform particle size of the cut material, which can effectively reduce the secondary injury to the trapped person during the rescue process. The Y-shaped center three-position four-way directional control valve is used to control the on-off and commutation of the oil circuit of the tunneler. When the Y-shaped center directional control valve returns to the center position, the oil inlet is interrupted, the oil return cavity remains unobstructed, and the rotary motor is in a floating state and does not bear the braking load, which is beneficial to protecting the motor from damage; the O-shaped center three-position four-way directional control valve is used to control the on-off and commutation of the oil circuit for the swinging action of the tunneler. When the directional control valve returns to the center position, the oil circuit will be immediately interrupted, and the swinging action of the oil cylinder stops, improving the safety guarantee of the operation.

[0019] Based on the above technical solutions, the present invention can also be improved as follows.

[0020] Preferably, a first limiting structure is provided on the connecting box to limit the rotation angle of the tunneler during operation.

[0021] The beneficial effect of adopting the above further solution is to prevent equipment failure caused by excessive rotation.

[0022] Preferably, a second limiting structure is provided on the breaker to limit the rotation angle when the tunneler is retracted.

[0023] The beneficial effect of adopting the above further solution is to prevent equipment failure caused by excessive rotation.

[0024] Preferably, the swing oil cylinder includes a swing cylinder body, a hollow piston disposed in the swing cylinder body, and a rotary output shaft. One end of the rotary output shaft located in the cylinder body is fixedly connected with a helical gear. Helical tooth grooves are provided on the inner wall of the cavity of the piston, and the helical gear is adapted to the helical tooth grooves; the tunneler is fixedly connected to the rotary output shaft.

[0025] The beneficial effect of adopting the above further solution is small volume, large torque, high swing accuracy, and can adapt to harsh working environments.

[0026] Preferably, the breaker includes a main valve, an accumulator, an impact piston, a nitrogen chamber, and a drill rod. The hydraulic oil drives the impact piston to reciprocate, and when the impact piston strokes, it impacts the drill rod at a high speed to generate a breaking force.

[0027] The beneficial effect of adopting the above further solution is that it can quickly break objects such as concrete and stones, and significantly improve the efficiency of rescue work.

[0028] Preferably, the tunneler includes a tunneling cylinder body, a hydraulic motor, a planetary gear reducer, a main output shaft, a second locking pin, a tunneling head, and cutting teeth.

[0029] The beneficial effect of adopting the above further solution is low vibration, low noise, small destructiveness, small and uniform particle size of the cut material, etc. It can effectively reduce the noise and vibration generated during rescue work, reduce the secondary injury to the trapped personnel caused by the cut material during the rescue process, and protect the safety of the trapped personnel and the rescuers.

[0030] Further, the tunneling head is connected to the main output shaft through 1 locking pin shaft.

[0031] Only one locking nut needs to be disassembled to remove the tunneling head, and other types of tunneling heads can be quickly replaced according to the needs of the rescue site to improve the efficiency of rescue work. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic structural diagram of the opening and breaking integrated attachment of the present invention;

[0033] Figure 2 It is a cross-sectional view of the tunneler in the opening and breaking integrated attachment of the present invention;

[0034] Figure 3 Cross-sectional view of the breaker in the breaking and opening integrated attachment of the present invention;

[0035] Figure 4 Schematic diagram of the second position of the tunneler and the breaker in the breaking and opening integrated attachment of the present invention;

[0036] Figure 5 Schematic diagram of the first perspective structure of the oil circuit quick-change part in the embodiment;

[0037] Figure 6 Schematic diagram of the second perspective structure of the oil circuit quick-change part in the embodiment;

[0038] Figure 7 Schematic diagram of the attachment connection end of the excavator in the embodiment;

[0039] Figure 8 Schematic diagram after the oil circuit quick-change part is connected to the attachment connection end of the excavator in the embodiment;

[0040] Figure 9 Schematic diagram of the hydraulic control valve group of the present invention;

[0041] Figure 10 Hydraulic schematic diagram of the breaking and opening integrated attachment of the present invention controlled by the hydraulic control valve group of the present invention;

[0042] Figure 11 Cross-sectional view of the swing cylinder in the embodiment of the present invention.

[0043] In the drawings, the list of the component names represented by each reference numeral is as follows:

[0044] 1. Oil circuit quick-change part;

[0045] 1.1. Connection seat; 1.2. Valve block B; 1.2.1. Quick-connect male joint;

[0046] 1.3. Quick-change cylinder; 1.4. First locking pin; 1.5. Valve block A; 1.5.1. Quick-connect female joint;

[0047] 2. Hydraulic control valve group;

[0048] 2.1. Valve body; 2.2. O-type center three-position four-way directional control valve; 2.3. Two-position four-way directional control valve;

[0049] 2.4. Y-type center three-position four-way directional control valve; P. Oil supply joint; T. Return oil joint; 2.7. Pressure reducing valve; 2.8. Pressure measurement interface;

[0050] 3. Connection box;

[0051] 3.1. First limit structure;

[0052] 4. Breaker;

[0053] 4.1 Second limiting structure; 4.2 Main valve; 4.3 Accumulator; 4.4 Impact piston; 4.5 Nitrogen chamber; 4.6 Drill rod; 4.7 High and low pressure conversion chamber; 4.8 Upper bearing surface; 4.9 Lower bearing surface; 4.10 Constant high pressure chamber

[0054] 5. Swing oil cylinder;

[0055] 5.1 Swing cylinder block; 5.2 Hollow piston; 5.3 Rotary output shaft

[0056] 6. Boring machine;

[0057] 6.1 Boring cylinder block; 6.2 Hydraulic motor; 6.3 Planetary gear reducer; 6.4 Main output shaft

[0058] 6.5 Second locking pin; 6.6 Boring head; 6.7 Picks Detailed implementation mode

[0059] The principles and features of the present invention will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0060] Example 1:

[0061] Please refer to Figure 9 As shown, a hydraulic control valve group 2 includes a valve body 2.1, an O-type center-position three-position four-way directional control valve 2.2, a two-position four-way directional control valve 2.3, and a Y-type center-position three-position four-way directional control valve 2.4. The O-type center-position three-position four-way directional control valve 2.2, the two-position four-way directional control valve 2.3, and the Y-type center-position three-position four-way directional control valve 2.4 are all arranged on the valve body 2.1;

[0062] Please refer to Figure 10 As shown, an oil supply main pipe and an oil return main pipe are arranged in the valve body 2.1. An oil supply joint P communicating with the oil supply main pipe and an oil return joint T communicating with the oil return main pipe are arranged on the valve body 2.1;

[0063] The oil supply main pipe is respectively communicated with the oil supply ports of the O-type center-position three-position four-way directional control valve 2.2, the two-position four-way directional control valve 2.3, and the Y-type center-position three-position four-way directional control valve 2.4;

[0064] The oil return main pipe is respectively communicated with the oil return ports of the O-type center-position three-position four-way directional control valve 2.2, the two-position four-way directional control valve 2.3, and the Y-type center-position three-position four-way directional control valve 2.4;

[0065] The O-shaped center-position three-way four-way directional control valve 2.2 is provided with a first working oil port P3 and a second working oil port P4, the two-way four-way directional control valve 2.3 is provided with a first working oil port P2 and a second working oil port T2, and the Y-shaped center-position three-way four-way directional control valve 2.4 is provided with a first working oil port P1 and a second working oil port T1.

[0066] A pressure reducing valve 2.7 is further provided on the valve body 2.1, and the pressure reducing valve 2.7 is communicated with the main oil supply pipe;

[0067] A pressure measuring interface 2.8 is further provided on the valve body 2.1, which is convenient for monitoring the pipeline oil pressure at any time to ensure the stability of the oil circuit system.

[0068] Embodiment 2:

[0069] As Figure 1 shown, a breaking and opening integrated attachment includes a connecting box body 3, a breaker 4, a swing oil cylinder 5 and a tunneler 6. The breaker 4 and the swing oil cylinder 5 are fixed on the connecting box body 3, the tunneler 6 is arranged on the swing oil cylinder 5, and a hydraulic motor 6.2 is arranged in the tunneler 6; a hydraulic control valve group as described in Embodiment 1 is arranged in the connecting box body 3;

[0070] The first working oil port and the second working oil port of the O-shaped center-position three-way four-way directional control valve are respectively communicated with the first pressure chamber and the second pressure chamber of the swing oil cylinder 5; the first working oil port and the second working oil port of the two-way four-way directional control valve are respectively communicated with the oil supply end and the oil return end of the breaker 4; the first working oil port and the second working oil port of the Y-shaped center-position three-way four-way directional control valve are respectively communicated with the oil supply end and the oil return end of the hydraulic motor 6.2 of the tunneler 6.

[0071] A first limiting structure 3.1 is provided on the connecting box to limit the rotation angle of the tunneler 6 during operation.

[0072] A second limiting structure 4.1 is provided on the breaker 4 to limit the rotation angle of the tunneler 6 when it is retracted.

[0073] As Figure 11 shown, the swing oil cylinder 5 includes a swing cylinder body 5.1, a hollow piston 5.2 arranged in the swing cylinder body 5.1 and a rotary output shaft 5.3. One end of the rotary output shaft 5.3 located in the cylinder body is fixedly connected with a helical gear. Helical tooth grooves are provided on the inner wall of the cavity of the hollow piston, and the helical gear is adapted to the helical tooth grooves; the tunneler 6 is fixedly connected with the rotary output shaft 5.3.

[0074] As Figure 3As shown, the crusher 4 includes a main valve 4.2, an accumulator 4.3, an impact piston 4.4, a nitrogen chamber 4.5 and a drill rod 4.6. The hydraulic oil drives the impact piston 4.4 to reciprocate. During the stroke of the impact piston 4.4, the drill rod 4.6 is impacted at high speed to generate a crushing force.

[0075] As Figure 2 shown, the tunneler 6 includes a tunneling cylinder block 6.1, a hydraulic motor 6.2, a planetary gear reducer 6.3, a main output shaft 6.4, a second locking pin 6.5, a tunneling head 6.6 and cutting teeth 6.7.

[0076] The tunneling head 6.6 is connected to the main output shaft 6.4 through a locking pin shaft.

[0077] Embodiment 3:

[0078] The present invention will be described below in conjunction with an excavator.

[0079] Excavator attachments are generally quickly connected to the excavator through an oil circuit quick-change part 1.

[0080] As Figure 5 , 6 shown, the attachment is generally provided with a connection seat 1.1, a valve block B 1.2, and a quick-connect male joint 1.2.1. The connection end of the excavator attachment is as Figure 7 shown, provided with a quick-change oil cylinder 1.3 and a valve block A 1.5. During operation, the hydraulic oil provided by the main oil pump of the excavator pushes the quick-change oil cylinder 1.3 to expand and contract, pushing the first locking pin 1.4 forward to further clamp the welding pin shaft of the connection seat 1.1, realizing the structural locking of the attachment and the excavator, as Figure 8 shown.

[0081] While the quick-change oil cylinder 1.3 is advancing, the connection of the excavator oil circuit and the attachment oil circuit is also realized. Specifically: the quick-change oil cylinder 1.3 will also push the valve block A 1.5 forward, so that the quick-connect female joint 1.5.1 provided on the valve block A 1.5 is docked with the quick-connect male joint 1.2.1 provided on the valve block B 1.2, realizing the connection of the main oil circuit of the excavator and the attachment oil circuit. The entire connection time is about 1 - 4 s. This oil circuit switching system not only takes a short time and has high efficiency, but also has reliable sealing and a stable oil circuit system.

[0082] The lower end of the connection seat 1.1 of this part is connected to the connection box body 3; the quick-connect male joint 1.2.1 is installed on the valve block B 1.2, and the valve block B 1.2 is fixed on the connection seat 1.1.

[0083] As Figure 9 , Figure 10As shown in the figure, the hydraulic control valve group 2 includes a valve body 2.1, an O-type center-position three-way four-way directional control valve 2.2, a two-way four-way directional control valve 2.3, and a Y-type center-position three-way four-way directional control valve 2.4. The valve body 2.1 designed in the present invention divides two oil circuits into six oil circuits, greatly saving the use of pipelines. A pressure reducing valve 2.7 is provided to effectively control the oil pressure of the oil circuit and avoid damage to the motor caused by system overload. In addition, a pressure measuring interface 2.8 is also provided.

[0084] The six oil circuits separated from the valve body 2.1

[0085] Two of them pass through the O-type center-position three-way four-way directional control valve 2.2 and are used to control the on-off and commutation of the oil circuit for the swinging action of the tunneler 6. When the directional control valve returns to the center position, the oil circuit will be immediately interrupted and the swinging action of the oil cylinder will stop, improving the safety guarantee of the operation.

[0086] Another two pass through the two-way four-way directional control valve 2.3 and are used to control the on-off of the oil circuit for the crushing action.

[0087] The last two pass through the Y-type center-position three-way four-way directional control valve 2.4 and are used to control the on-off and commutation of the oil circuit for the tunneler 6. When the Y-type center-position directional control valve returns to the center position, the inlet oil is interrupted and the return oil chamber remains unobstructed. The slewing motor is in a floating state and does not bear the braking load, which is beneficial to protecting the motor from damage. The electromagnetic directional control valve of this control system is installed on the valve body 2.1, and the valve body 2.1 is fixed inside the connecting box 3.

[0088] The connecting box 3 is composed of a fixing plate, a surrounding plate, an upper plate, and a rib plate, and is generally in a box structure, having the characteristics of compact structure, light weight, and high strength. The connecting box is provided with a first limiting structure 3.1 for limiting the rotation angle of the tunneler 6 during operation.

[0089] The breaker 4 mainly consists of a main valve 4.2, an accumulator 4.3, an impact piston 4.4, a nitrogen chamber 4.5, and a drill rod 4.6. The drill rod 4.6 is made of special materials through special processing techniques and has high strength and high wear resistance. During operation, the impact piston 4.4 is driven by hydraulic oil to reciprocate, and when the impact piston 4.4 strokes, it impacts the drill rod 4.6 at high speed to generate a crushing force, which can quickly crush concrete, stones and other objects, significantly improving the rescue work efficiency. The breaker 4 is provided with a second limiting structure 4.1 for limiting the rotation angle of the tunneler 6 when it is retracted.

[0090] The swing cylinder 5 adopts a combined spiral tooth structure inside, and has the characteristics of small volume, large output torque, and high swing accuracy as a whole, such as Figure 4As shown in the figure, the tunneler 6 is connected to the connecting seat 1.1 through the swing oil cylinder 5, and can swing within the range of 0° to 90° with the breaker 4 and maintain its position. When the breaker 4 is working, the tunneler 6 retracts, and the included angle with the breaking drill rod 4.6 is 0°. The overall structure is compact and can better bear the impact. When used for opening holes, the expansion angle of the tunneling head 6.6 can be adjusted, and the maximum included angle with the breaking drill rod 4.6 is 90°, ensuring that the hole-opening task can be completed under complex on-site rescue conditions.

[0091] The realization of the hole-opening function is completed by the tunneler 6, which is mainly composed of a tunneling cylinder block 6.1, a hydraulic motor 6.2, a planetary gear reducer 6.3, a main output shaft 6.4, a second locking pin 6.5, a tunneling head 6.6, and cutting teeth 6.7. Among them, the planetary gear reducer 6.3 has the characteristics of small volume, high rigidity, and high-precision transmission efficiency, ensuring the safety and stability during the high-strength operation of the attachment. During hole-opening rescue, the torque output by the hydraulic motor 6.2 is amplified by the planetary gear reducer 6.3 and acts on the end of the cutting teeth 6.7, thereby increasing the cutting force of the cutting teeth 6.7 and ensuring that the tunneling head 6.6 quickly completes the hole opening. The tunneler 6 has the characteristics of low vibration, low noise, small destructiveness, and small and uniform particle size of the cut material, which can effectively reduce the noise and vibration generated during the rescue work, reduce the secondary injury to the trapped personnel caused by the cut material during the rescue process, and protect the safety of the trapped personnel and the rescuers. Moreover, the tunneling head 6.6 is connected to the main output shaft 6.4 through the second locking pin 6.5, and only one locking nut needs to be removed to remove the tunneling head 6.6, and other types of tunneling heads 6.6 can be quickly replaced according to the needs of the rescue site to improve the rescue work efficiency.

[0092] Working principle: As shown in the figure, the present invention realizes the switching of the oil circuit by developing a control system that combines a control valve block with two three-position four-way electromagnetic directional control valves and a two-position four-way electromagnetic directional control valve, greatly simplifying the use of the oil circuit system and pipelines.

[0093] When the excavator is working, the oil circuit quick-change part 1 quickly completes the oil circuit connection and mechanical connection. At the same time, the excavator circuit is connected to the solenoid valve circuit, and the excavator is successfully connected to the attachment.

[0094] The hydraulic oil supplied by the main pump of the excavator enters the hydraulic control valve group 2 through the oil circuit quick-change and is divided into six paths.

[0095] Two of the six paths of hydraulic oil are used to drive the breaker 4 to realize the impact breaking action. Since a one-way oil circuit is used in this part, a two-position four-way electromagnetic directional control valve is adopted.

[0096] Another two paths are used to drive the hydraulic motor 6.2 to realize the rotary cutting action of the tunneling head 6.6. A Y-type center-position directional control valve is adopted for this rotary part. When the oil inlet channel is cut off, the motor can stop rotating smoothly, avoiding damage to the motor.

[0097] The last two hydraulic oil lines are used to drive the swing cylinder 5, and the tunneling head 6.6 can achieve a swing motion of 0° to 90°. The directional control valve for controlling the swing motion adopts O-type neutral control. When the oil inlet line is cut off, it can be quickly braked. This control method improves the safety guarantee while ensuring the smoothness of the swing motion.

[0098] The hydraulic control valve group 2 realizes the versatility of the rescue attachment without increasing the host oil circuit, greatly simplifies the pipeline, and makes the operation more convenient and fast.

[0099] Crushing function:

[0100] The impact piston 4.4 has an upper pressure-bearing surface 4.8 and a lower pressure-bearing surface 4.9. The areas of the upper pressure-bearing surface 4.8 and the lower pressure-bearing surface 4.9 are different, and the pressure difference generated by the area difference enables the movement of the impact piston 4.4.

[0101] Initial stage: The upper high-low pressure conversion chamber 4.7 is connected to the return oil and is in a low-pressure state. The impact piston 4.4 starts to move upward under the pressure of the lower constant high-pressure chamber 4.10.

[0102] Rising pressure accumulation stage: The impact piston 4.4 continues to rise under the action of the lower high pressure. At the same time, the accumulator 4.3 starts to accumulate pressure. Due to the rise of the impact piston 4.4, the rear nitrogen chamber 4.5 is compressed, and the pressure in the nitrogen chamber 4.5 increases to store energy.

[0103] Top dead center: The impact piston 4.4 continues to rise. When it reaches the top dead center, the high pressure is connected to the cylinder body signal channel. The spool in the main valve 4.2 rises under the action of the high pressure, connecting the high-low pressure conversion chamber above the impact piston 4.4 in the cylinder body to the high pressure. Since the upper pressure-bearing area of the impact piston 4.4 is larger than the lower one, the impact piston 4.4 starts to move downward.

[0104] Descending impact stage: The impact piston 4.4 starts to descend and impact. At the same time, the accumulator 4.3 starts to release pressure to ensure sufficient hydraulic oil flow in the upper chamber of the impact piston 4.4. The impact piston 4.4 impacts downward under the combined action of the hydraulic pressure and the pressure in the upper nitrogen chamber 4.5.

[0105] Bottom dead center: The impact piston 4.4 continues to impact until it collides with the drill rod 4.6. At the same time, the signal channel is connected to the return oil, the lower part of the spool is connected to the low pressure, and the spool moves downward under the action of the upper high pressure. The high pressure in the high-low pressure conversion chamber 4.7 above the impact piston 4.4 is closed, and the low pressure is connected, completing one working cycle.

[0106] Swing function: The hydraulic oil supplied by the main pump enters the swing cylinder 5 through the O-type center-position three-position four-way directional control valve 2.2. The hydraulic oil pushes the hollow piston 5.2 forward or backward. The helical gear connected to the hollow piston 5.2 is forced to rotate under the constraint of the helical teeth of the swing cylinder block 5.1, thus converting the linear motion into the forward and reverse swing rotational motion of the rotating output shaft 5.3.

[0107] Hole-opening function: The hydraulic oil supplied by the main pump enters the hydraulic motor 6.2 through the Y-type center-position three-position four-way directional control valve 2.4 to drive the hydraulic motor 6.2 to rotate. The output shaft of the hydraulic motor 6.2 is splined to the sun gear of the planetary gear reducer. After two-stage planetary gear reduction, the output torque increases. Then, the main output shaft 6.4 drives the tunneling head 6.6 to rotate, and the high-hardness cutting teeth 6.7 continuously cut the obstacles to open holes. Therefore, the broken particles cut during the hole-opening process are relatively small, which can avoid the safety problem of large broken particles falling and endangering the trapped personnel.

[0108] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A combined breaking and opening tool, comprising a connecting box body, a breaker, a swing oil cylinder and a tunneler, characterized in that, The crusher and the swing cylinder are fixed on the connection box body. The tunneler is arranged on the swing cylinder, and a hydraulic motor is arranged inside the tunneler. A hydraulic control valve group is arranged inside the connection box body. The hydraulic control valve group includes a valve body, an O-type center-position three-way four-way directional control valve, a two-way four-way directional control valve, and a Y-type center-position three-way four-way directional control valve. The O-type center-position three-way four-way directional control valve, the two-way four-way directional control valve, and the Y-type center-position three-way four-way directional control valve are all arranged on the valve body. The O-type center-position three-way four-way directional control valve, the two-way four-way directional control valve, and the Y-type center-position three-way four-way directional control valve are respectively provided with a first working oil port and a second working oil port. The first working oil port and the second working oil port of the O-type center-position three-way four-way directional control valve are respectively communicated with the first pressure chamber and the second pressure chamber of the swing cylinder. The first working oil port and the second working oil port of the two-way four-way directional control valve are respectively communicated with the oil supply end and the oil return end of the crusher. The first working oil port and the second working oil port of the Y-type center-position three-way four-way directional control valve are respectively communicated with the oil supply end and the oil return end of the hydraulic motor of the tunneler. The crusher includes a main valve, an accumulator, an impact piston, a nitrogen chamber, and a drill rod. Hydraulic oil drives the impact piston to reciprocate. When the impact piston makes a stroke, it impacts the drill rod at a high speed to generate a crushing force. The impact piston has an upper pressure-bearing surface and a lower pressure-bearing surface. The areas of the upper pressure-bearing surface and the lower pressure-bearing surface are different. The pressure difference generated by the area difference realizes the movement of the impact piston. Initial stage: The upper high-low pressure conversion chamber is connected to the oil return and is in a low-pressure state. The impact piston starts to move upward under the action of the pressure in the lower constant high-pressure chamber. Ascending pressure accumulation stage: The impact piston continues to rise under the action of the lower high pressure. At the same time, the accumulator starts to accumulate pressure. Since the impact piston rises, the nitrogen chamber is squeezed later, and the pressure in the nitrogen chamber increases to reserve energy. Top dead center: The impact piston continues to rise. When it reaches the top dead center, the cylinder signal channel is connected to high pressure. The spool in the main valve rises under the action of high pressure, connecting the high-low pressure conversion chamber above the impact piston in the cylinder to high pressure. Since the upper pressure-bearing area of the impact piston is larger than the lower one, the impact piston starts to move downward. Descending impact stage: The impact piston starts to move downward to impact. At the same time, the accumulator starts to release pressure to ensure sufficient hydraulic oil flow in the upper chamber of the impact piston. The impact piston impacts downward under the combined action of the hydraulic pressure and the pressure in the upper nitrogen chamber. Bottom dead center: The impact piston continues to impact until it collides with the drill rod. At the same time, the signal channel is connected to the oil return, the lower part of the spool is connected to low pressure, the spool moves downward under the action of the upper high pressure, and the high pressure in the high-low pressure conversion chamber above the impact piston is closed, and the low pressure is connected, completing one working cycle.

2. The broken-open hole integrated attachment according to claim 1, characterized in that A pressure reducing valve is further arranged on the valve body, and the pressure reducing valve is communicated with the main oil supply pipe.

3. The disassembled and holed integral attachment according to claim 1, wherein A pressure measuring interface is further arranged on the valve body.

4. The disassembled and perforated integrated attachment according to claim 1, characterized in that, An oil supply main pipe and an oil return main pipe are arranged inside the valve body. An oil supply joint communicated with the oil supply main pipe and an oil return joint communicated with the oil return main pipe are arranged on the valve body. The oil supply main pipe is respectively communicated with the oil supply ports of the O-type center-position three-way four-way directional control valve, the two-way four-way directional control valve, and the Y-type center-position three-way four-way directional control valve. The return oil main pipe is respectively communicated with the oil return ports of the O-type center-position three-way four-way directional control valve, the two-way four-way directional control valve, and the Y-type center-position three-way four-way directional control valve; The Y-type center-position three-way four-way directional control valve is used to control the on-off and commutation of the oil circuit of the tunneler. When it returns to the center position, the oil inlet is interrupted and the oil return cavity remains unblocked; the O-type center-position three-way four-way directional control valve is used to control the on-off and commutation of the oil circuit for the swinging action of the tunneler. When it returns to the center position, the oil circuit is immediately interrupted.

5. The split-opening integrated attachment according to claim 1, wherein A first limiting structure is provided on the connecting box body to limit the rotation angle of the tunneler during operation.

6. The breaking and opening integrated attachment according to claim 1, characterized in that, A second limiting structure is provided on the breaker to limit the rotation angle of the tunneler when it is retracted.

7. The split-opening integrated attachment according to claim 1, wherein The swing oil cylinder includes a swing cylinder body, a hollow piston arranged in the swing cylinder body, and a rotary output shaft. One end of the rotary output shaft located in the swing cylinder body is fixedly connected with a helical gear. Helical tooth grooves are provided on the inner wall of the cavity of the hollow piston, and the helical gear is adapted to the helical tooth grooves; the tunneler is fixedly connected with the rotary output shaft.

8. The split-opening integrated attachment according to claim 1, wherein, The tunneler includes a tunneling cylinder body, a hydraulic motor, a planetary gear reducer, a main output shaft, a second locking pin, a tunneling head, and cutting teeth. The tunneling head is connected to the main output shaft through the second locking pin. After the torque output by the hydraulic motor is amplified by the planetary gear reducer, it acts on the cutting tooth end, thereby increasing the cutting force of the cutting teeth and ensuring that the tunneling head quickly completes the hole opening.

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