Cutterhead buffering and oil supplementing overflow valve group

Abstract

The invention discloses a cutter head buffering and oil supplementing overflow valve group, which belongs to the technical field of coal mine construction, and comprises an energy accumulator, a valve block and a pressure measuring joint, an oil duct R1-R2 and an oil duct L1-L2 are formed in the valve block, the oil duct R1-R2 comprises an oil port R1 and an oil port R2, the oil duct L1-L2 comprises an oil port L1 and an oil port L2, the oil port R2 and the oil port L2 are used for being connected with a main pump side oil way, and the oil port R1 and the oil port L1 are used for being directly installed on a motor oil port; the energy accumulator is connected with the valve block and used for releasing stored hydraulic oil when the system generates a negative pressure trend, the energy accumulator comprises a first branch communicated with the R1-R2 oil ducts and a second branch communicated with the L1-L2 oil ducts, a first one-way valve is arranged on the first branch, and a second one-way valve is arranged on the second branch; two oil ways are arranged between the R1-R2 oil ways and the L1-L2 oil ways, and a first overflow valve and a second overflow valve are arranged on the two oil ways respectively. According to the invention, the risk of damage to the closed hydraulic system caused by high-frequency impact of the cutter head hydraulic system of the hob type rock tunneling machine can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine construction, in particular to a cutter head buffer oil replenishment overflow valve group. Background Art

[0002] The roller cutter rock boring machine is a special equipment for hard rock excavation. It can complete the excavation of hard rock geology, slag transportation and other processes, and take into account the tunnel bolt support operation. It is a continuous operation and transportation equipment. When the equipment is in operation, the cutter head device of the roller cutter rock boring machine will cut the rock layer of hard rock geology and strip the slag to complete the tunnel excavation.

[0003] With the development of tunnel and roadway construction technology in my country, the functional requirements of construction equipment must cope with the diversity of geological changes, that is, they must be able to cope with excavation needs under different geological conditions to meet the equipment construction progress and efficiency.

[0004] At present, the solutions used to deal with the hydraulic system impact conditions caused by the high-frequency impact of the actuator operation are relatively simple, and most of them use closed systems. The high-pressure relief valve equipped with the closed pump of the closed system is used to deal with it and eliminate the peak pressure of the hydraulic system. This treatment method using pump elements is relatively simple, but it has the following shortcomings under high-frequency impact conditions: First, the high-pressure buffer valve equipped with the closed pump itself is generally far away from the driving hydraulic motor, and due to the distance of the pipeline, a response lag problem will occur. That is, a pressure peak will be generated at the hydraulic motor, causing damage to the components; second, the closed system hydraulic motor is generally equipped with an independent flushing system, the system layout is complex, and the component size is large; third, due to the pipeline length and system response time problems, it is easy to cause the hydraulic motor to be damaged by suction. Summary of the invention

[0005] The invention provides a cutterhead buffer oil replenishment overflow valve group to solve the technical problem that the high-frequency impact of the cutterhead hydraulic system of a roller cutter type rock tunneling machine is likely to cause damage to the closed hydraulic system.

[0006] According to one aspect of the present invention, there is provided a cutter disc buffer oil replenishment overflow valve group, comprising an accumulator, a valve block, and a pressure measuring joint; an R1-R2 oil channel and an L1-L2 oil channel are formed on the valve block, the R1-R2 oil channel comprises an oil port R1 and an oil port R2, the L1-L2 oil channel comprises an oil port L1 and an oil port L2, the oil port R2 and the oil port L2 are used to connect to the main pump side oil circuit, and the oil port R1 and the oil port L1 are used to be directly installed on the motor oil port; the accumulator is connected to the valve block, and is used to release the stored hydraulic oil when the system generates a negative pressure trend, the accumulator comprises a first branch connected to the R1-R2 oil channel and a second branch connected to the L1-L2 oil channel, a first one-way valve is arranged on the first branch, and a second one-way valve is arranged on the second branch; two oil circuits are arranged between the R1-R2 oil channel and the L1-L2 oil channel, and a first overflow valve and a second overflow valve are arranged on the two oil circuits, respectively.

[0007] Optionally, the accumulator is arranged at the X port of the valve block and can release the hydraulic oil for a short time so as to quickly replenish the oil when a negative pressure trend occurs in the oil channel.

[0008] Optionally, the cutter disc buffer oil replenishment overflow valve group also includes an adjustable flow valve, which is installed between the R1-R2 oil channel and the L1-L2 oil channel to adjust the output flow of the flushing system.

[0009] Optionally, the adjustable flow valve is arranged in the output oil circuit of the accumulator to provide flushing hydraulic oil of appropriate flow according to the working requirements of the cutter head drive motor.

[0010] Optionally, the cutter disc buffer oil replenishment overflow valve group includes a return oil circuit connected in parallel with the accumulator. When the pressure in the hydraulic system drops below a set threshold, the accumulator can replenish pressurized oil to the oil channel through the return oil circuit to ensure the stability of the hydraulic system.

[0011] Optionally, the first relief valve and the second relief valve are installed in opposite directions and connected to the oil port R1 and the oil port L1 respectively, so as to achieve pressure balance when the oil circuit on one side is overloaded and negative pressure is generated on the other side.

[0012] Optionally, the valve block is also provided with a plurality of pressure measuring joints for detecting the oil replenishment pressure and the oil channel working pressure so as to monitor the system pressure changes in real time.

[0013] Optionally, a flushing module is integrated on the valve block, and the flushing module includes a one-way valve for unidirectionally conveying flushing oil to the motor housing.

[0014] Optionally, a pressure regulating mechanism is provided in the valve block, and the pressure regulating mechanism includes a regulating valve for adjusting the pre-charge pressure of the accumulator, so as to adjust the pressure release rate of the accumulator according to different working conditions to meet the stable operation requirements of the cutter head drive motor under different load conditions.

[0015] Optionally, the valve block is also equipped with a pressure sensor for automatically triggering the opening and closing control of the overflow valve when the system pressure exceeds a set value, thereby ensuring the stability of the hydraulic system.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] The integrated cutterhead buffering oil replenishment relief valve group enables the roller cutter rock boring machine to achieve fast and stable pressure response in the hard rock excavation environment with high-frequency impact, significantly reducing the pressure peak of the hydraulic system and protecting the hydraulic motor and other key components from damage. At the same time, the clever arrangement of the accumulator and the relief valve can quickly replenish oil under negative pressure, effectively preventing the hydraulic motor from being damaged by cavitation and extending the service life of the equipment. In addition, the compact integrated design of the valve group simplifies the system layout, reduces the length and complexity of the pipeline, and improves the system's piping flexibility and installation convenience; the equipped flushing module not only improves the heat dissipation and cleaning effect of the motor housing, but also reduces the energy consumption of the hydraulic system, thereby further reducing maintenance costs while improving equipment stability and construction efficiency, and has high versatility and practicality.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is a structural schematic diagram of the cutter disc buffer oil replenishment overflow valve group of the present invention.

[0021] Legend:

[0022] 1. Accumulator; 2. Pressure measuring joint; 3. Adjustable flow valve; 4. Check valve; 5.1 First check valve; 5.2 Second check valve; 6.1 First overflow valve; 6.2 Second overflow valve; 7. Valve block. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0024] The following is combined with Figure 1 This application is described in further detail.

[0025] The embodiment of the present application discloses a cutter disc buffer oil replenishment overflow valve group.

[0026] Reference Figure 1 A cutter disc buffer oil replenishment overflow valve group includes an accumulator 1, a valve block 7, and a pressure measuring joint 2; an R1-R2 oil channel and an L1-L2 oil channel are formed on the valve block 7, the R1-R2 oil channel includes an oil port R1 and an oil port R2, the L1-L2 oil channel includes an oil port L1 and an oil port L2, the oil port R2 and the oil port L2 are used to connect the main pump side oil circuit, and the oil port R1 and the oil port L1 are used to be directly installed on the motor oil port; the accumulator 1 is connected to the valve block 7, and is used to release the stored hydraulic oil when the system generates a negative pressure trend. The accumulator 1 includes a first branch connected to the R1-R2 oil channel and a second branch connected to the L1-L2 oil channel. A first check valve 51 is arranged on the first branch, and a second check valve 52 is arranged on the second branch; two oil circuits are arranged between the R1-R2 oil channel and the L1-L2 oil channel, and a first overflow valve 61 and a second overflow valve 62 are respectively arranged on the two oil circuits.

[0027] The cutter disc buffer oil replenishment relief valve group is directly connected to the main pump side oil circuit and the motor oil port through the R1-R2 oil channel and the L1-L2 oil channel set on the valve block 7, wherein the accumulator 1 is connected to the valve block 7, and is used to release the hydraulic oil stored in it when the system has a negative pressure trend, ensuring that the oil channel can be quickly replenished under negative pressure conditions. The accumulator 1 is connected to the R1-R2 oil channel and the L1-L2 oil channel through two branches, respectively, and a first one-way valve 51 and a second one-way valve 52 are installed on each branch to ensure that the oil can only flow in one direction to prevent backflow from affecting the system. In addition, two independent oil circuits are also set between the R1-R2 and L1-L2 oil channels, and a first overflow valve 61 and a second overflow valve 62 are installed on each oil circuit, so that when one side of the oil circuit is overloaded and the other side of the oil circuit is under negative pressure, the overflow valve can respond quickly to open to form a loop, providing instantaneous pressure buffering and balance. The purpose of this design is to effectively reduce the pressure peak under high-frequency impact, avoid impact damage to hydraulic system components, and quickly replenish oil under negative pressure conditions to prevent the hydraulic motor from being damaged by cavitation, thereby extending the service life of the system and equipment and ensuring the stable and efficient operation of the roller cutter rock boring machine.

[0028] The accumulator 1 is arranged at the X-port of the valve block 7, and can release the hydraulic oil in a short time so as to quickly replenish the oil when a negative pressure trend appears in the oil channel. The accumulator 1 is directly connected to the oil channel by being arranged at the X-port of the valve block 7. When a negative pressure trend appears in the oil channel, the accumulator 1 can quickly release the stored hydraulic oil in a short time to replenish the oil pressure in the oil channel, thereby maintaining the stability of the system. The working principle of this design is that when the system pressure is lower than a certain threshold, the accumulator 1 immediately responds to release the pressure oil so as to quickly fill the vacancy in the oil channel and avoid the problem of hydraulic motor suction caused by negative pressure. This function of rapid oil replenishment is particularly important under high-frequency impact conditions, which can effectively prevent the hydraulic system from fluctuating damage and improve the overall safety of the system and the service life of the equipment.

[0029] The cutter disc buffer oil replenishment overflow valve group also includes an adjustable flow valve 3, which is installed between the R1-R2 oil channel and the L1-L2 oil channel to adjust the output flow of the flushing system. The cutter disc buffer oil replenishment overflow valve group adds an adjustable flow valve 3, which is installed between the R1-R2 oil channel and the L1-L2 oil channel, and is mainly used to adjust the output flow of the flushing system. Its working principle is to control the flow of the flushing hydraulic oil by adjusting the opening of the flow valve, and adapt different flushing oil volumes according to the actual needs of the cutter disc drive motor to ensure the stability of the system operation. The purpose of this design is to effectively optimize the oil consumption during the flushing process, so that the required flushing oil volume can be accurately provided under different load conditions.

[0030] The adjustable throttle valve 3 is arranged in the output oil circuit of the accumulator 1 to provide an appropriate flow of flushing hydraulic oil according to the working requirements of the cutter drive motor. The adjustable throttle valve 3 is installed in the output oil circuit of the accumulator 1 to adjust the flow of the flushing hydraulic oil according to the working requirements of the cutter drive motor to provide an appropriate amount of flushing oil. Its working principle is: when the cutter drive motor is in different working states, the adjustable throttle valve 3 adjusts the size of the oil flow according to the setting to ensure that sufficient flushing hydraulic oil is provided when the load is large, and reduce the flushing oil flow when the load is small, thereby achieving energy saving and efficient cooling.

[0031] The cutter disc buffer oil replenishment relief valve group includes a return oil circuit connected in parallel with the accumulator 1. When the pressure in the hydraulic system drops below the set threshold, the accumulator 1 can replenish the pressure oil to the oil channel through the return oil circuit to ensure the stability of the hydraulic system. The cutter disc buffer oil replenishment relief valve group is designed with a return oil circuit connected in parallel with the accumulator 1. When the hydraulic system pressure is lower than the set threshold, the accumulator 1 quickly replenishes the pressure oil to the oil channel through the return oil circuit. Its working principle is: when the system pressure drops below the threshold, the reserve hydraulic oil in the accumulator 1 will immediately enter the oil channel through the return oil circuit, quickly restore the system pressure, and prevent the hydraulic circuit from fluctuating or malfunctioning due to insufficient pressure. The purpose of this design is to achieve instant oil replenishment when the pressure is insufficient through the linkage between the return oil circuit and the accumulator 1.

[0032] The first relief valve 61 and the second relief valve 62 are installed in opposite directions and connected to the oil port R1 and the oil port L1, respectively, so as to achieve pressure balance when one side of the oil circuit is overloaded and the other side generates negative pressure. The first relief valve 61 and the second relief valve 62 are installed in opposite directions and connected to the oil port R1 and the oil port L1, respectively, so as to ensure automatic pressure balance when one side of the oil circuit is overloaded and the other side generates negative pressure. Its working principle is: when one side of the oil circuit in the system generates high pressure due to overload, the relief valve will open immediately to release part of the pressure; at the same time, the other side of the oil circuit is in a low pressure state due to negative pressure, and the opening of the relief valve can make the pressure oil flow from the high pressure side to the low pressure side, forming a circulation loop, thereby replenishing the oil on the low pressure side and reducing the pressure on the high pressure side.

[0033] The valve block 7 is also provided with a plurality of pressure measuring joints 2 for detecting the oil replenishment pressure and the working pressure of the oil channel, so as to monitor the pressure changes of the system in real time. Through these pressure measuring joints 2, the operator or the control system can collect real-time pressure data at different pipeline positions, so as to grasp the pressure conditions of the oil replenishment system and the oil channel at any time. The purpose of this design is to provide real-time pressure monitoring for the hydraulic system, so that timely warning or triggering of automatic adjustment measures can be made when pressure fluctuations, overload or negative pressure trends occur.

[0034] The valve block 7 is integrated with a flushing module, which includes a one-way valve 4 for delivering the flushing oil to the motor housing in one direction. When the hydraulic system is operating, the one-way valve 4 of the flushing module ensures that the flushing oil can only flow in one direction, entering the motor housing for cleaning and cooling, and preventing any backflow or impurities from entering the flushing circuit. The purpose of this design is to provide a stable one-way flushing oil flow, keep the motor housing clean and effectively dissipate heat, and prevent the accumulation of impurities and overheating.

[0035] A pressure regulating mechanism is provided in the valve block 7, and the pressure regulating mechanism includes a regulating valve for regulating the pre-charge pressure of the accumulator 1, so as to adjust the pressure release rate of the accumulator 1 according to different working conditions, and meet the stable operation requirements of the cutter head drive motor under different load conditions. The pre-charge pressure of the accumulator 1 is controlled by the regulating valve, and under different load conditions, the accumulator 1 can provide a suitable hydraulic oil pressure according to the set release rate. For example, under high load conditions, the regulating valve can increase the pre-charge pressure, so that the accumulator 1 can quickly release more hydraulic oil to meet the pressure requirements of the motor; while under low load, reducing the pre-charge pressure can reduce the release of oil and avoid energy waste.

[0036] The valve block 7 is also equipped with a pressure sensor, which is used to automatically trigger the opening and closing control of the overflow valve when the system pressure exceeds the set value to ensure the stability of the hydraulic system. The pressure sensor continuously monitors the pressure in the system. Once it detects that the pressure reaches or exceeds the preset upper limit, the sensor immediately sends a signal to open the overflow valve to discharge part of the pressure oil from the system to reduce the excessive pressure in the system; when the pressure returns to a safe range, the overflow valve automatically closes and stops the pressure relief. The purpose of this design is to provide an automated pressure regulation mechanism to effectively prevent hydraulic system shocks and component damage caused by excessive pressure, thereby ensuring the stability and safety of the hydraulic system, reducing equipment maintenance requirements, and extending the service life of the system.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. The cutter disc buffer oil replenishment overflow valve group is characterized by: It comprises an accumulator (1), a valve block (7), and a pressure measuring joint (2); The valve block (7) is formed with an R1-R2 oil passage and an L1-L2 oil passage, the R1-R2 oil passage includes an oil port R1 and an oil port R2, the L1-L2 oil passage includes an oil port L1 and an oil port L2, the oil ports R2 and L2 are used to connect to the main pump side oil circuit, and the oil ports R1 and L1 are used to be directly installed on the motor oil port; The accumulator (1) is connected to the valve block (7) and is used to release the stored hydraulic oil when the system generates a negative pressure trend. The accumulator (1) comprises a first branch connected to the R1-R2 oil passage and a second branch connected to the L1-L2 oil passage. The first branch is provided with a first check valve (51) and the second branch is provided with a second check valve (52). Two oil passages are arranged between the R1-R2 oil passage and the L1-L2 oil passage, and a first overflow valve (61) and a second overflow valve (62) are respectively arranged on the two oil passages.

2. The cutter head buffer oil replenishment overflow valve assembly according to claim 1, characterized in that: The accumulator (1) is arranged at the X port of the valve block (7) and can release hydraulic oil for a short period of time so as to quickly replenish the oil when a negative pressure trend occurs in the oil channel.

3. The cutter head buffer oil replenishment overflow valve assembly according to claim 1, characterized in that: The cutter disc buffer oil replenishment overflow valve group also includes an adjustable flow valve (3), which is installed between the R1-R2 oil channel and the L1-L2 oil channel and is used to adjust the output flow of the flushing system.

4. The cutter head buffer oil replenishment overflow valve assembly according to claim 3 is characterized in that: The adjustable flow valve (3) is arranged in the output oil circuit of the accumulator (1) to provide flushing hydraulic oil of appropriate flow according to the working requirements of the cutter head drive motor.

5. The cutter head buffer oil replenishment overflow valve assembly according to claim 4, characterized in that: The cutter disc buffer oil replenishment overflow valve group comprises a return oil circuit connected in parallel with the accumulator (1); when the pressure in the hydraulic system drops below a set threshold, the accumulator (1) can replenish pressure oil to the oil channel through the return oil circuit to ensure the stability of the hydraulic system.

6. The cutter head buffer oil replenishment overflow valve assembly according to any one of claims 1 to 5, characterized in that: The first overflow valve (61) and the second overflow valve (62) are installed in opposite directions and are connected to the oil port R1 and the oil port L1 respectively, so as to achieve pressure balance when one side of the oil circuit is overloaded and the other side generates negative pressure.

7. The cutter head buffer oil replenishment overflow valve assembly according to claim 6, characterized in that: The valve block (7) is also provided with a plurality of pressure measuring joints (2) for detecting the oil replenishment pressure and the oil channel working pressure so as to monitor the system pressure changes in real time.

8. The cutter head buffer oil replenishment overflow valve assembly according to claim 7, characterized in that: The valve block (7) is integrated with a flushing module, which includes a one-way valve (4) for unidirectionally conveying flushing oil to the motor housing.

9. The cutter head buffer oil replenishment overflow valve assembly according to claim 1, characterized in that: A pressure regulating mechanism is arranged in the valve block (7), and the pressure regulating mechanism comprises a regulating valve for regulating the pre-charge pressure of the accumulator (1), so as to adjust the pressure release rate of the accumulator (1) according to different working conditions, thereby meeting the stable operation requirements of the cutter head drive motor under different load conditions.

10. The cutter head buffer oil replenishment overflow valve assembly according to claim 1, characterized in that: The valve block (7) is also equipped with a pressure sensor for automatically triggering the opening and closing control of the overflow valve when the system pressure exceeds a set value, thereby ensuring the stability of the hydraulic system.

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