A pressurizing device for a tunneling apparatus

Abstract

This utility model relates to the field of tunneling equipment technology and discloses a pressurization device for tunneling equipment. It can dynamically switch the oil supply mode according to the load conditions, reducing energy consumption, improving control accuracy and operational stability. It also features a reasonable structure, strong practicality, and ease of promotion. The device includes an oil tank with a return oil zone and a suction oil zone. The top of the return oil zone has a return oil interface for connecting to the return oil end of the tunneling equipment's actuator. The top of the suction oil zone has two suction oil interfaces. One suction oil interface is connected to a main pump mechanism, and the other suction oil interface is connected to a secondary pump mechanism for connecting to the tunneling equipment's control oil circuit system. Both the main pump mechanism and the secondary pump mechanism are connected to a confluence mechanism connected to the tunneling equipment's actuator. Under low load, the main pump mechanism supplies oil to the confluence mechanism alone, while the secondary pump mechanism supplies oil only to the tunneling equipment's control oil circuit system. Under high load, both the main pump mechanism and the secondary pump mechanism supply oil to the confluence mechanism.

Description

Technical Field

[0001] This utility model relates to the field of tunneling equipment technology, and more specifically, to a pressurization device for tunneling equipment. Background Technology

[0002] During the operation of tunneling equipment, the pressurization device, as a core power component, directly affects tunneling efficiency and operational stability. Existing tunneling equipment pressurization devices mostly employ single-pump oil supply or fixed combined pump oil supply modes, which have the following technical drawbacks: On the one hand, the single-pump oil supply mode is difficult to meet the needs of different load conditions. Under low load conditions, a single pump needs to simultaneously meet the oil pressure supply of the actuator and the control oil circuit system. In order to ensure the control accuracy of precision components such as directional control valve groups and proportional valves in the control oil circuit, it is often necessary to limit the flow rate by means of throttling, resulting in large energy loss, rapid oil temperature rise, and failure to fully utilize the high flow rate characteristics of the pump body. On the other hand, under high load conditions, the output pressure and flow rate of a single pump are insufficient, which can easily lead to problems such as attenuation of tunneling power and reduction in propulsion speed. Especially in scenarios such as rock breaking and high-power propulsion, it is difficult to meet the requirements of efficient operation. On the other hand, the traditional combined pump oil supply mode lacks a flexible operating condition switching mechanism. The main pump and auxiliary pump are mostly in a fixed joint oil supply state, maintaining synchronous operation regardless of the load. This causes unnecessary energy waste under low load, and the auxiliary pump cannot provide stable oil pressure specifically for the control oil circuit system. As a result, the precision control components will lag or have accuracy deviations due to pressure fluctuations, affecting the operational responsiveness of the tunneling equipment. Utility Model Content

[0003] The purpose of this utility model is to solve the problems mentioned in the background art above, and then to propose a pressurization device for tunneling equipment.

[0004] The technical solution adopted by this utility model to solve its technical problem is: A pressurization device for tunneling equipment includes an oil tank with a return oil zone and an oil suction zone inside. The top of the return oil zone has a return oil port for connecting to the return oil end of the tunneling equipment's actuator, and the top of the suction zone has two suction ports. One suction port is connected to a main pump mechanism, and the other suction port is connected to a secondary pump mechanism for connecting to the tunneling equipment's control oil circuit system. The main pump mechanism and the secondary pump mechanism are jointly connected to a confluence mechanism connected to the tunneling equipment's actuator. Under low load, the main pump mechanism supplies oil to the confluence mechanism alone, while the secondary pump mechanism supplies oil only to the tunneling equipment's control oil circuit system. Under high load, the main pump mechanism and the secondary pump mechanism jointly supply oil to the confluence mechanism.

[0005] Furthermore, the above scheme includes a main pump mechanism, the inlet end of which is connected to one of the oil suction ports through a main inlet pipe, and a high-pressure oil suction filter is installed on the main inlet pipe. The outlet end of the main pump is connected to the confluence mechanism through a main outlet pipe, and a first check valve and a main overflow valve are installed sequentially on the main outlet pipe.

[0006] Furthermore, the above scheme further specifies that the main hydraulic pump is an axial piston pump.

[0007] Furthermore, the above solution includes a high-pressure oil suction filter with a filtration accuracy of 100μm, a pressure resistance of 1MPa, and a differential pressure transmitter.

[0008] Furthermore, the above scheme has an opening pressure of 0.3 MPa for the first check valve and a set pressure of 31.5 MPa for the main relief valve.

[0009] Furthermore, the above scheme includes an auxiliary pump mechanism, the inlet end of which is connected to another oil suction port through an auxiliary inlet pipe, and a low-pressure oil suction filter is installed on the auxiliary inlet pipe. The outlet end of the auxiliary pump is connected to a confluence mechanism through an auxiliary outlet pipe, and a second check valve, an auxiliary overflow valve, and an on / off valve are installed sequentially on the auxiliary outlet pipe. The auxiliary outlet pipe is also connected to a branch pipe for connecting to the control oil circuit system of the tunneling equipment. The branch pipe is located between the auxiliary overflow valve and the on / off valve, and an opening valve is installed on it.

[0010] Furthermore, the above solution incorporates a gear pump as the auxiliary liquid pump.

[0011] Furthermore, the low-pressure oil suction filter described above has a filtration accuracy of 150μm and a pressure resistance of 0.6Mpa.

[0012] Furthermore, the above scheme has an opening pressure of 0.2 MPa for the second check valve and a set pressure of 16 MPa for the auxiliary relief valve.

[0013] Furthermore, the above scheme includes a Y-shaped merging pipe, the inlet end of which is connected to the main outlet pipe and the auxiliary outlet pipe respectively, and a reversing valve is installed on the pipe connected to the auxiliary outlet pipe. The outlet end of the Y-shaped merging pipe is connected to the tunneling equipment actuator through a delivery pipe, and a pressure valve and a high-pressure oil filter are installed sequentially on the delivery pipe.

[0014] Furthermore, the high-pressure oil outlet filter described above has a filtration accuracy of 10μm and a pressure resistance of 31.5MPa.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This invention achieves precise matching between load conditions and oil supply through the division of labor and cooperation between the main pump mechanism and the auxiliary pump mechanism, as well as the dynamic switching of oil supply modes. Under low load conditions, the main pump mechanism independently supplies oil to meet basic operational requirements, while the auxiliary pump mechanism focuses on providing stable oil pressure for the control oil circuit system, avoiding the energy waste of traditional single-pump oil supply. Under high load conditions, the auxiliary pump mechanism quickly switches into the merging mechanism to form a combined oil supply, instantly increasing the output pressure and flow rate. It does not require long-term high-power operation, significantly reducing ineffective energy consumption and extending the service life of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Reference numerals: 1. Oil tank; 11. Oil return zone; 12. Oil suction zone; 13. Oil return port; 14. Oil suction port; 2. Main pump mechanism; 21. Main hydraulic pump; 22. Main inlet pipe; 23. High-pressure suction filter; 24. Main outlet pipe; 25. First check valve; 26. Main relief valve; 3. Auxiliary pump mechanism; 31. Auxiliary pump; 32. Auxiliary inlet pipe; 33. Low-pressure suction filter; 34. Auxiliary outlet pipe; 35. Second check valve; 36. Auxiliary relief valve; 37. On / off valve; 38. Branch pipe; 39. Opening valve; 4. Merging mechanism; 41. Y-shaped merging pipe; 42. Reversing valve; 43. Infusion pipe; 44. Pressure valve; 45. High-pressure outlet filter. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments: See attached document Figure 1As shown, a pressurization device for tunneling equipment includes an oil tank 1. The oil tank 1 is internally divided into a return oil zone 11 and an oil suction zone 12, with a guide channel between them to effectively separate impurities in the return oil and reduce the oil temperature. This is a conventional technical method, and will not be elaborated further in this invention. The return oil zone 11 has a return oil interface 13 at its top, which is connected to the return oil end of the tunneling equipment's actuator to ensure stable hydraulic oil return. The oil suction zone 12 has two suction interfaces 14 at its top, each with a distinct function. One suction interface 14 is connected to a main pump mechanism 2. Mechanism 2 has a large flow output characteristic and is suitable for the normal working conditions of tunneling equipment; another oil suction port 14 is connected to auxiliary pump mechanism 3, which is connected to the control oil circuit system of tunneling equipment to provide stable oil pressure; and the oil outlets of main pump mechanism 2 and auxiliary pump mechanism 3 are connected to confluence mechanism 4, which is connected to the actuator of tunneling equipment; under low load conditions, main pump mechanism 2 independently supplies oil to confluence mechanism 4, and auxiliary pump mechanism 3 provides hydraulic oil to the control oil circuit system of tunneling equipment; under high load conditions, auxiliary pump mechanism 3 quickly switches into confluence mechanism 4, forming a joint oil supply mode with main pump mechanism 2.

[0018] In the specific implementation of this utility model, the main pump mechanism 2 and the auxiliary pump mechanism 3 of the oil suction zone 12 have a clear division of labor. The main pump mechanism 2 is suitable for providing a large flow rate under normal working conditions, while the auxiliary pump mechanism 3 provides stable oil pressure for the control oil circuit system (such as precision components such as directional control valve groups and proportional valves). The oil outlets of the two are connected to the tunneling equipment actuator through the confluence mechanism 4, which can switch the oil supply mode according to the load conditions. When the tunneling equipment is under low load conditions, the main pump mechanism 2 independently supplies oil to the confluence mechanism 4 to meet the basic operation requirements of the tunneling equipment actuator. At this time, the auxiliary pump mechanism 3 provides hydraulic oil to the tunneling equipment control oil circuit system alone to ensure control accuracy. When the tunneling equipment enters a high load condition (such as rock breaking and powerful propulsion), the auxiliary pump mechanism 3 quickly switches into the confluence mechanism 4 to form a joint oil supply mode with the main pump mechanism 2, instantly increasing the output pressure and flow rate to ensure efficient and stable operation of the tunneling operation.

[0019] For the above scheme, please refer to the appendix. Figure 1As shown, the main pump mechanism 2 includes a main hydraulic pump 21, which is an axial piston pump. The inlet of the main hydraulic pump 21 is connected to one of the oil suction ports 14 through the main inlet pipe 22. A high-pressure oil suction filter 23 is installed on the main inlet pipe 22. The high-pressure oil suction filter 23 has a filtration accuracy of 100μm, a pressure resistance of 1MPa, and is equipped with a differential pressure transmitter. The outlet of the main hydraulic pump 21 is connected to the confluence mechanism 4 through the main outlet pipe 24. A first check valve 25 and a main overflow valve 26 are installed sequentially on the main outlet pipe 24. The opening pressure of the first check valve 25 is 0.3MPa to prevent oil from flowing back into the main hydraulic pump 21 during confluence. The set pressure of the main overflow valve 26 is 31.5MPa to limit the maximum pressure of the tunneling black equipment system and avoid overload.

[0020] In this design, the main pump mechanism 2 uses the main hydraulic pump 21 as its core power source. Its inlet end is connected to the oil suction port 14 of the oil tank 1 through the main inlet pipe 22. The high-pressure suction filter 23 on the main inlet pipe 22 can filter impurities in the oil and protect the internal components of the main hydraulic pump 21. The differential pressure transmitter can promptly alarm when the filter element is blocked. The outlet end is connected to the confluence mechanism 4 through the main outlet pipe 24. The first check valve 25 on the main outlet pipe 24 can prevent the oil from flowing back into the main hydraulic pump 21 during confluence, thus avoiding damage to the main hydraulic pump 21 due to reverse pressure. The main overflow valve 26 limits the maximum system pressure through pressure relief, preventing excessive pressure from damaging the tunneling equipment under overload conditions such as propulsion cylinder jamming.

[0021] For the above scheme, please refer to the appendix. Figure 1 As shown, the auxiliary pump mechanism 3 includes an auxiliary liquid pump 31, which is a gear pump. The inlet end of the auxiliary liquid pump 31 is connected to another oil suction port 14 through an auxiliary inlet pipe 32. A low-pressure oil suction filter 33 is installed on the auxiliary inlet pipe 32. The low-pressure oil suction filter 33 has a filtration accuracy of 150μm and a pressure resistance of 0.6MPa. The outlet end of the auxiliary liquid pump 31 is connected to the confluence mechanism 4 through an auxiliary outlet pipe 34. A second check valve 35, an auxiliary overflow valve 36, and an on / off valve 37 are installed in sequence on the auxiliary outlet pipe 34. The opening pressure of the second check valve 35 is 0.2MPa, and the set pressure of the auxiliary overflow valve is 16MPa. The auxiliary outlet pipe 34 is also connected to a branch pipe 38 for connecting to the control oil circuit system of the tunneling equipment. The branch pipe 38 is located between the auxiliary overflow valve 36 and the on / off valve 37, and an opening valve 39 is installed on it.

[0022] In this design, the auxiliary pump mechanism 3 uses the auxiliary liquid pump 31 as its power source. The inlet end is connected to another oil suction port 14 of the oil tank 1 through the auxiliary inlet pipe 32. The low-pressure suction filter 33 on the auxiliary inlet pipe 32 can filter oil impurities and protect the auxiliary liquid pump 31. The outlet end is connected to the confluence mechanism 4 through the auxiliary outlet pipe 34. The second check valve 35 on the pipeline can prevent oil from flowing back into the auxiliary liquid pump 31 during confluence. The auxiliary overflow valve 36 can limit the output pressure of the auxiliary pump to avoid overpressure in the control oil circuit or confluence system. The on / off valve 37 is used to control the flow of oil from the auxiliary liquid pump 31 to the confluence mechanism 4. In addition, the auxiliary outlet pipe 34 leads out a branch pipe 38 between the auxiliary overflow valve 36 and the on / off valve 37 to connect to the control oil circuit. The opening valve 39 on the branch pipe 38 can adjust the flow rate into the control oil circuit to meet the power requirements of the control components.

[0023] For the above scheme, please refer to the appendix. Figure 1 As shown, the merging mechanism 4 includes a Y-shaped merging pipe 41. The inlet end of the Y-shaped merging pipe 41 is connected to the main outlet pipe 24 and the auxiliary outlet pipe 34 respectively. A reversing valve 42 is installed on the pipe connected to the auxiliary outlet pipe 34. In addition, the outlet end of the Y-shaped merging pipe 41 is connected to the tunneling equipment actuator through a delivery pipe 43. A pressure valve 44 and a high-pressure oil filter 45 are installed sequentially on the delivery pipe 43. The filtration accuracy of the high-pressure oil filter 45 is 10μm.

[0024] In this design, the merging mechanism 4 is centered around a Y-shaped merging pipe 41. Its two inlet ends are connected to the main outlet pipe 24 and the auxiliary outlet pipe 34, respectively, to achieve the merging of oil from the main pump 21 and the auxiliary pump 31. A reversing valve 42 installed on the pipe connected to the auxiliary outlet pipe 34 can control whether the oil from the auxiliary pump 31 enters the Y-shaped merging pipe 41, thus adapting to different load conditions. The outlet end of the Y-shaped merging pipe 41 is connected to the tunneling equipment actuator through a delivery pipe 43. The pressure valve 44 on the delivery pipe 43 can stably output the oil pressure to the tunneling equipment actuator, ensuring smooth operation. The high-pressure oil filter 45 performs fine filtration on the merged oil to prevent impurities from entering the tunneling equipment actuator and causing wear.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pressurization device for tunneling equipment, comprising an oil tank (1), wherein the oil tank (1) is provided with an oil return zone (11) and an oil suction zone (12), and an oil return interface (13) for connecting to the oil return end of the tunneling equipment actuator is provided at the top of the oil return zone (11), characterized in that: Two oil suction ports (14) are provided at the top of the oil suction area (12); One of the oil suction ports (14) is connected to a set of main pump mechanisms (2), and the other oil suction port is connected to a set of auxiliary pump mechanisms (3) for connecting to the control oil circuit system of the tunneling equipment. The main pump mechanism (2) and the auxiliary pump mechanism (3) are connected to a set of confluence mechanisms (4) for connecting to the actuator of the tunneling equipment. Under low load, the main pump mechanism (2) supplies oil to the confluence mechanism (4) alone, and the auxiliary pump mechanism (3) supplies oil only to the tunneling equipment control oil circuit system. Under high load, the main pump mechanism (2) and the auxiliary pump mechanism (3) supply oil to the confluence mechanism (4) together.

2. The pressurization device for tunneling equipment according to claim 1, characterized in that: The main pump mechanism (2) includes a main liquid pump (21); The inlet end of the main liquid pump (21) is connected to one of the oil suction ports (14) through the main inlet pipe (22), and a high-pressure oil suction filter (23) is installed on the main inlet pipe (22). The outlet end of the main liquid pump (21) is connected to the confluence mechanism (4) through the main outlet pipe (24), and a first check valve (25) and a main overflow valve (26) are installed on the main outlet pipe (24) in sequence.

3. The pressurization device for tunneling equipment according to claim 2, characterized in that: The main pump (21) is an axial piston pump.

4. The pressurization device for tunneling equipment according to claim 3, characterized in that: The high-pressure oil suction filter (23) has a filtration accuracy of 100μm, a pressure resistance of 1MPa, and is equipped with a differential pressure transmitter.

5. A pressurization device for tunneling equipment according to claim 4, characterized in that: The opening pressure of the first check valve (25) is 0.3 MPa, and the set pressure of the main relief valve (26) is 31.5 MPa.

6. A pressurization device for tunneling equipment according to claim 5, characterized in that: The auxiliary pump mechanism (3) includes an auxiliary liquid pump (31); The inlet end of the auxiliary liquid pump (31) is connected to another oil suction port (14) through the auxiliary inlet pipe (32), and a low-pressure oil suction filter (33) is installed on the auxiliary inlet pipe (32). The outlet end of the auxiliary liquid pump (31) is connected to the confluence mechanism (4) through the auxiliary outlet pipe (34), and a second check valve (35), an auxiliary overflow valve (36) and an on / off valve (37) are installed in sequence on the auxiliary outlet pipe (34). The auxiliary outlet pipe (34) is also connected to a branch pipe (38) for connecting to the control oil circuit system of the tunneling equipment. The branch pipe (38) is located between the auxiliary overflow valve (36) and the on / off valve (37), and an opening valve (39) is installed on it.

7. A pressurization device for tunneling equipment according to claim 6, characterized in that: The auxiliary liquid pump (31) is a gear pump.

8. A pressurization device for tunneling equipment according to claim 6, characterized in that: The low-pressure oil suction filter (33) has a filtration accuracy of 150μm and a pressure resistance of 0.6Mpa.

9. A pressurization device for tunneling equipment according to claim 6, characterized in that: The opening pressure of the second check valve (35) is 0.2 MPa, and the set pressure of the auxiliary relief valve is 16 MPa.

10. A pressurization device for tunneling equipment according to claim 9, characterized in that: The merging mechanism (4) includes a Y-shaped merging pipe (41); The inlet end of the Y-shaped confluence pipe (41) is connected to the main outlet pipe (24) and the auxiliary outlet pipe (34) respectively. A reversing valve (42) is installed on the pipe connected to the auxiliary outlet pipe (34). The outlet end of the Y-shaped confluence pipe (41) is connected to the tunneling equipment actuator through the delivery pipe (43). A pressure valve (44) and a high-pressure oil filter (45) are installed on the delivery pipe (43) in sequence.

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