Hydraulic control system and arch anchor trolley

Abstract

The hydraulic control system is applied to the arch anchor trolley, and comprises a first main pump, a second main pump, a proportional overflow valve and a motor: the first main pump is used for supplying oil to the anchor rod system in a constant pressure working state; the second main pump is an electric proportional pump and is used for supplying oil to the anchor rod system or the arch system in the constant pressure working state; the proportional overflow valve is connected with the first main pump and is used for controlling the outlet pressure of the first main pump; the motor is used for supplying power to the first main pump and the second main pump; the rated power of the motor is P, the power of the first main pump is P1, the power of the second main pump is P2, and P1+P2≤P. In the application, the anchor rod system and the arch system can be supplied with oil separately or simultaneously; the second main pump is an electric proportional constant pressure pump, and when the arch system and the anchor rod system are supplied with oil simultaneously, the second main pump can control the operating power thereof, so that the sum of the operating powers of the first main pump and the second main pump does not exceed the rated power of the motor, and the motor is prevented from being overloaded.

Description

Technical Field

[0001] This application relates to the field of arch anchor trolley technology, specifically to a hydraulic control system and an arch anchor trolley. Background Technology

[0002] During tunnel construction, the arch anchor trolley is used to complete the construction of the arch frame and anchor bolts. In existing arch anchor trolleys, due to the functional limitations of the hydraulic system, the arch frame function and the anchor bolt function are mostly performed separately, which greatly reduces the construction efficiency of the arch anchor trolley.

[0003] In the existing technology, some hydraulic control systems of arch anchor trolleys use a combination of load-sensitive modules and constant pressure control modules to supply oil to the arch frame system and anchor bolt system simultaneously. However, since the load-sensitive module and the constant pressure control module are both driven by the same motor, the simultaneous use of the load-sensitive module and the constant pressure control module will cause the motor to overload, which will lead to motor damage and affect the construction efficiency of the arch anchor trolley.

[0004] Therefore, the hydraulic control system of the existing anchor trolley has room for further improvement. Utility Model Content

[0005] In view of this, and addressing the technical problem in the prior art where the hydraulic control system of the arch anchor trolley uses both a load-sensitive module and a constant pressure control module to simultaneously supply oil to the arch frame system and the anchor bolt system, which can lead to motor overload, this application provides a hydraulic control system and an arch anchor trolley. The hydraulic control system is equipped with dual constant pressure pumps, which can ensure that the operating power does not exceed the rated power of the motor when oil is supplied to the arch frame system and the anchor bolt system simultaneously, thereby avoiding motor overload.

[0006] In a first aspect, this application provides a hydraulic control system applied in an anchor trolley, comprising: The first main pump is used to supply oil to the anchor bolt system under constant pressure operating conditions; The second main pump is used to supply oil to the anchor bolt system or arch system under constant pressure working conditions. A proportional relief valve, connected to the first main pump, is used to control the outlet pressure of the first main pump; The motor is used to supply power to the first main pump and the second main pump; The second main pump is an electric proportional pump; the rated power of the motor is P, the power of the first main pump is P1, the power of the second main pump is P2, and P1+P2≤P.

[0007] Compared with the prior art, the hydraulic control system of this application adopts dual constant pressure pumps, which can supply oil to the anchor system and the arch frame system individually or simultaneously to ensure the power requirements of the arch anchor trolley in each working mode. At the same time, the second main pump is an electro-proportional constant pressure pump, which can continuously and proportionally control its output flow through electrical signals to control its operating power. Therefore, when the hydraulic control system supplies oil to the arch frame system and the anchor system at the same time, the second main pump can control its operating power so that the sum of the operating power of the first main pump and the second main pump does not exceed the rated power of the motor, thereby avoiding motor overload.

[0008] Preferred options also include: The monitoring module is used to monitor the power of the first main pump, the second main pump, and the motor; The control module is used to control the displacement of the second main pump based on the power of the first main pump and the motor.

[0009] Preferred options also include: Radiators are used to dissipate heat from hydraulic systems. The first gear pump, connected to the motor, is used to control the start and stop of the radiator.

[0010] Preferred options also include: The second gear pump, connected to the motor, is used to supply oil to the anchor bolt system.

[0011] Preferred options also include: The first filter is connected in series between the second main pump and the arch system; The first check valve is connected in series between the first filter and the arch system.

[0012] Preferably, the first main pump, the second main pump, the first gear pump, and the second gear pump are connected in series with the motor.

[0013] Secondly, this application provides an anchor trolley, including the hydraulic control system in any embodiment provided in the first aspect, and further comprising: Anchor bolt system, connected to the hydraulic control system, is used for anchor bolting operations; The arch frame system, connected to the hydraulic control system, is used for arch frame operations; The chassis power system is used to supply oil to the arch frame system.

[0014] Compared with the prior art, the arch anchor trolley of this application includes a hydraulic control system and a chassis power system, both of which can supply oil to the arch frame system to ensure the stability and diversity of the power supply to the arch frame system of the arch anchor trolley.

[0015] Preferably, the arch frame system includes a left arm control module, a middle arm control module, a right arm control module, a turntable control module, and an auxiliary control module; The left arm control module, the middle arm control module, the right arm control module, the turntable control module, and the auxiliary control module are connected in parallel.

[0016] Preferably, the chassis powertrain system includes: Engine pump set, used to supply oil to the arch frame system; The third gear pump, connected in series between the engine pump assembly and the radiator, is used to control the start and stop of the radiator; Solenoid valve, connected in series between the arch frame system and the engine pump assembly; The second check valve is connected in series between the engine pump unit and the arch system; The second filter is connected in series between the second check valve and the engine pump assembly.

[0017] Preferably, it has: In the arch frame operation mode, the chassis power system or the second main pump is used to supply oil to the arch frame system; In the bolting operation mode, the first main pump is used to supply oil to the bolting system, while the second main pump is used to supply oil to the intermediate arm control module. In the arch frame and anchor bolt operation mode, the first main pump is used to supply oil to the anchor bolt system, and the second main pump is used to supply oil to the arch frame system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the principle of the arch anchor trolley provided in one embodiment of this application.

[0019] Reference numerals: 1. First main pump; 2. Second main pump; 3. Proportional relief valve; 4. Motor; 5. Radiator; 6. First gear pump; 7. Second gear pump; 8. First filter; 9. First check valve; 10. Engine pump assembly; 11. Third gear pump; 12. Solenoid valve; 13. Second check valve; 14. Second filter. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0021] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0022] Those skilled in the art should understand that in the disclosure of this application, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0023] The present application will now be described in further detail with reference to the accompanying drawings, see below. Figure 1 illustrate.

[0024] First aspect like Figure 1 As shown, this application provides a hydraulic control system applied in an arch anchor trolley to supply oil to the arch frame system and anchor bolt system of the arch anchor trolley to meet the operating energy requirements of the arch frame system and anchor bolt system.

[0025] Specifically, the hydraulic control system includes a motor 4, a first main pump 1, a second main pump 2, and a proportional relief valve 3. The motor 4 is connected to the first main pump 1 and the second main pump 2 to supply power to them. The first main pump 1 and the second main pump 2 are connected in series. The first main pump 1 supplies oil to the anchor bolt system, and the second main pump 2 can supply oil to either the anchor bolt system or the arch frame system. The proportional relief valve 3 is connected in parallel with the first main pump 1 and is used to control the load feedback pressure of the first main pump 1 so that the oil supply pressure of the first main pump 1 to the anchor bolt system is controlled within a set range. The second main pump 2 is an electro-proportional pump, which can continuously and proportionally control its output flow rate through an electrical signal to control its operating power. Therefore, when the hydraulic control system supplies oil to both the arch frame system and the anchor bolt system simultaneously, the second main pump 2 can control its operating power so that the sum of the operating power of the first main pump 1 and the second main pump 2 does not exceed the rated power of the motor 4, thereby preventing the motor 4 from being overloaded.

[0026] The hydraulic control system also includes a detection module and a control module. The detection module can detect the power of the first main pump 1, the second main pump 2, and the motor 4 in a timely manner and feed the information back to the control module. The rated power of the motor 4 is P, the power of the first main pump 1 is P1, and the power of the second main pump 2 is P2. The control module controls the displacement of the second main pump 2 based on the power of the motor 4 and the first main pump 1, thereby controlling the power of the second main pump 2 so that P1 + P2 ≤ P. This ensures that the motor 4 is never overloaded during the operation of the hydraulic control system.

[0027] In this embodiment, the control module calculates the operating power of the second main pump 2 based on the power difference between the first main pump 1 and the motor 4. Then, it converts the power into an electrical signal value and transmits this signal value to the second main pump 2, so that the constant pressure pump operates according to the given information. This allows for precise control of the displacement of the second main pump 2, thereby achieving self-control and self-adjustment of the operating power of the second main pump 2, ensuring that the motor 4 of the hydraulic control system is never overloaded.

[0028] like Figure 1 As shown, a first check valve 9 and a first filter 8 are provided between the second main pump 2 and the arch system. The first filter 8 is connected in series with the first check valve 9. The first filter 8 is located close to the second main pump 2, that is, the first check valve 9 is located between the first filter 8 and the arch system. The first filter 8 is used to filter the oil flowing to the arch system. The first check valve 9 is used to ensure the one-way supply of oil from the second main pump 2 to the arch system, and to prevent the oil in the arch system from flowing back into the second main pump 2 and affecting the second main pump 2.

[0029] Furthermore, the hydraulic control system also includes a heat dissipation module, which includes a radiator 5 and a first gear pump 6. The first gear pump 6 is connected to the motor 4 and supplies oil to the radiator 5. It controls the start and stop of the radiator 5 by controlling the oil flow and pressure. The radiator 5 can dissipate heat from the hydraulic control system so that the hydraulic control system can be maintained at 40°C to 60°C, so as to ensure that the hydraulic control system can operate at the optimal operating temperature.

[0030] Among them, such as Figure 1 As shown, it also includes a second gear pump 7, which is connected to the motor 4 and is used to supply oil to the anchor bolt system. In this application, the first main pump 1, the second main pump 2, the first gear pump 6, the second gear pump 7 and the motor 4 are electrically connected in series; the oil supply circuits of the first gear pump 6, the first main pump 1, and the second main pump 2 to the anchor bolt system are connected in parallel.

[0031] In this application, the first main pump 1 includes a constant pressure working state and an unloading state. When the hydraulic control system is running, the second main pump 2 is basically in the constant pressure working state.

[0032] Second aspect This application provides an arch anchor trolley, which includes the hydraulic control system described in any embodiment of the first aspect. The arch anchor trolley also includes an anchor bolt system, an arch frame system, and a chassis power system. The anchor bolt system and the arch frame system are both connected to the hydraulic control system. The anchor bolt system is used for anchor bolting operations, the arch frame system is used for arch frame operations, and the chassis power system is used to supply oil to the arch frame system. Therefore, in the arch anchor trolley of this application, both the hydraulic control system and the chassis power system can supply oil to the arch frame system to ensure the stability and diversity of power supply to the arch frame system of the anchor cable trolley. At the same time, the hydraulic control system has the function of simultaneously supplying oil to the arch frame system and the anchor bolt system of the arch anchor trolley, and can ensure that the motor is not overloaded, thereby ensuring the operational stability and working efficiency of the arch anchor trolley.

[0033] The arch frame system includes a left arm control module, a middle arm control module, a right arm control module, a turntable control module, and an auxiliary control module that are set up in parallel.

[0034] like Figure 1 As shown, the chassis power system includes an engine pump assembly 10, a third gear pump 11, a solenoid valve 12, a second check valve 13, and a second filter 14. The engine pump assembly 10 is used to supply oil to the arch frame system. The third gear pump 11 is connected in series between the engine pump assembly 10 and the radiator 5 to control the start and stop of the radiator 5. That is, when the chassis power system is running, the start and stop of the radiator 5 can be controlled by the third gear pump 11 so that the chassis power system can maintain the optimal operating temperature. The solenoid valve 12 is connected in series between the arch frame system and the engine pump assembly 10. The engine pump assembly 10 includes a third main pump and an engine. When the engine is running, the solenoid valve 12 is energized so that the third main pump can start under low load. After starting, the solenoid valve 12 is de-energized so that the third main pump is in a constant pressure working state.

[0035] The second check valve 13 is connected in series between the engine pump assembly 10 and the arch frame system, and the second filter 14 is connected in series between the second check valve 13 and the engine pump assembly 10. In this embodiment, the working principle of the second check valve 13 and the second filter 14 is the same as that of the first check valve 9 and the first filter 8, and will not be described in detail here.

[0036] In practical use, the arch anchor trolley of this application includes the following three operating modes: First, when the arch anchor trolley is in the arch frame operation mode, the chassis power system or the second main pump 2 is used to supply oil to the arch frame system. In this mode, when the chassis power system supplies oil to the arch frame system, solenoid valve 12 is energized when the engine starts, and the third main pump starts under low load. After starting, solenoid valve 12 is de-energized, and the third main pump is in a constant pressure working state. The outlet of the third main pump supplies oil to the left arm control module, the middle arm control module, the right arm control module, the turntable control module, and the auxiliary control module. Operating each control module can achieve the corresponding action. The third gear pump 11 controls the start and stop of the radiator 5 to cool the hydraulic chassis power system. When the second main pump 2 supplies oil to the arch frame system, the first main pump 1 is unloaded by adjusting the proportional relief valve 3, at which time the second gear pump 7 is also unloaded. The second main pump 2 operates at constant pressure, and its maximum displacement is adjusted by an electrical signal. The outlet of the second main pump 2 supplies oil to the left arm control module, the intermediate arm control module, the right arm control module, the turntable control module, and the auxiliary control module. Operating each control module enables the corresponding action. The second gear pump 7 controls the start and stop of the radiator 5 to dissipate heat from the hydraulic control system.

[0037] Second, when the anchor trolley is in anchor bolting mode, the first main pump 1 supplies oil to the anchor bolting system, while the second main pump 2 supplies oil to the intermediate arm control module. By adjusting the proportional relief valve 3, the first main pump 1 is kept in the required constant pressure operating state, at which time the second gear pump 7 is in operation. The second main pump 2 is in constant pressure operating state, and its maximum displacement is adjusted by an electrical signal. The first main pump 1 and the second gear pump 7 supply oil to the anchor bolting system, and the second main pump 2 supplies oil to the intermediate arm control module. Anchor bolting operations can be carried out by operating the anchor bolting system and the intermediate arm control module. The first gear pump 6 controls the start and stop of the radiator 5 to dissipate heat from the hydraulic control system.

[0038] Third, when the arch anchor trolley is in the simultaneous operation mode of the arch frame and anchor bolts, the first main pump 1 is used to supply oil to the anchor bolt system, and the second main pump 2 is used to supply oil to the arch frame system. Based on the anchor bolt construction, the maximum displacement of the second main pump 2 is controlled by adjusting the electrical signal to ensure that it has sufficient oil supply to the left arm control module, the middle arm control module, the right arm control module, the turntable control module, and the auxiliary control module, thereby implementing the arch frame operation. Since the outlet pressure of the first main pump 1 is adjusted by the proportional relief valve 3, and the outlet pressure of the second main pump 2 is determined by the set parameters of its own control module, the anchor bolt and arch frame construction can be carried out without interference, and the motor 4 can be guaranteed not to be overloaded.

[0039] It should be noted that the various embodiments of this application can be arbitrarily combined into new embodiments, provided that the solutions do not conflict and the technical solutions can coexist.

[0040] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A hydraulic control system, applied in an arch anchor trolley, characterized in that, include: The first main pump (1) is used to supply oil to the anchor bolt system under constant pressure working conditions; The second main pump (2) is used to supply oil to the anchor system or arch system under constant pressure working conditions. A proportional relief valve (3) is connected to the first main pump (1) and is used to control the outlet pressure of the first main pump (1); The motor (4) is used to supply power to the first main pump (1) and the second main pump (2); Among them, the second main pump (2) is an electric proportional pump; the rated power of the motor (4) is P, the power of the first main pump (1) is P1, the power of the second main pump (2) is P2, and P1+P2≤P.

2. The hydraulic control system according to claim 1, characterized in that, Also includes: The monitoring module is used to monitor the power of the first main pump (1), the second main pump (2), and the motor (4); The control module is used to control the displacement of the second main pump (2) based on the power of the first main pump (1) and the motor (4).

3. The hydraulic control system according to claim 1, characterized in that, Also includes: Radiator (5) is used to dissipate heat from the hydraulic system; The first gear pump (6) is connected to the motor (4) and is used to control the start and stop of the radiator (5).

4. The hydraulic control system according to claim 3, characterized in that, Also includes: The second gear pump (7) is connected to the motor (4) and is used to supply oil to the anchor bolt system.

5. The hydraulic control system according to claim 1, characterized in that, Also includes: The first filter (8) is connected in series between the second main pump (2) and the arch system; The first check valve (9) is connected in series between the first filter (8) and the arch system.

6. The hydraulic control system according to claim 4, characterized in that, The first main pump (1), the second main pump (2), the first gear pump (6), the second gear pump (7) are connected in series with the motor (4).

7. An anchor trolley, comprising a hydraulic control system as described in any one of claims 1 to 6, characterized in that, Also includes: Anchor bolt system, connected to the hydraulic control system, is used for anchor bolting operations; The arch frame system, connected to the hydraulic control system, is used for arch frame operations; The chassis power system is used to supply oil to the arch frame system.

8. The arch anchor trolley according to claim 7, characterized in that, The arch frame system includes a left arm control module, a middle arm control module, a right arm control module, a turntable control module, and an auxiliary control module; The left arm control module, the middle arm control module, the right arm control module, the turntable control module, and the auxiliary control module are connected in parallel.

9. The arch anchor trolley according to claim 7, characterized in that, The chassis powertrain system includes: Engine pump unit (10) is used to supply oil to the arch frame system; The third gear pump (11) is connected in series between the engine pump group (10) and the radiator (5) to control the start and stop of the radiator (5); Solenoid valve (12) is connected in series between the arch frame system and the engine pump assembly (10); The second check valve (13) is connected in series between the engine pump assembly (10) and the arch frame system; The second filter (14) is connected in series between the second check valve (13) and the engine pump assembly (10).

10. The arch anchor trolley according to claim 7, characterized in that, have: In the arch frame operation mode, the chassis power system or the second main pump (2) is used to supply oil to the arch frame system; In the anchor bolt operation mode, the first main pump (1) is used to supply oil to the anchor bolt system, while the second main pump (2) is used to supply oil to the intermediate arm control module. In the arch frame and anchor bolt operation mode, the first main pump (1) is used to supply oil to the anchor bolt system, and the second main pump (2) is used to supply oil to the arch frame system.

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