An external cooling system for a hydraulic system

Abstract

This application relates to the field of temperature control and heat dissipation in hydraulic equipment, and discloses an external cooling system for hydraulic systems. In this application, the system uses a mobile frame assembly as its load-bearing foundation, with swivel casters and fixed casters at the bottom and a push handle on the side for flexible deployment. A power circulation pump unit, a forced air cooling unit, a safety overflow protection circuit, a direct-flow cooling branch, a filter cooling branch, a pressure intelligent monitoring unit, and an external quick-lock oil circuit interface are integrated into the frame. The external quick-lock oil circuit interface enables quick connection and leak-free isolation with the main unit's oil circuit. The safety overflow protection circuit automatically unloads overpressure. The filter cooling branch simultaneously purifies the oil. The pressure intelligent monitoring unit enables local display and remote transmission. The direct-flow cooling branch provides cooling under normal conditions without requiring motor startup. This solves the problems of poor versatility, lack of safety protection, limited functionality, inconvenient deployment, and low intelligence in existing integrated cooling systems.

Description

Technical Field

[0001] This application belongs to the field of hydraulic equipment temperature control and heat dissipation technology, specifically an external cooling system for hydraulic systems. Background Technology

[0002] In the existing technology, external cooling systems for hydraulic systems belong to the field of hydraulic equipment temperature control and heat dissipation technology. They are widely used in various hydraulic equipment scenarios such as industrial non-standard hydraulic stations, heavy-duty engineering machinery, metallurgical equipment, and vacuum equipment. Their core purpose is to efficiently cool down the heat generated during the operation of the hydraulic system, control the hydraulic oil temperature within a reasonable working range, avoid system failure caused by excessive oil temperature, and ensure the long-term stable operation of hydraulic equipment.

[0003] Its working principle is as follows: the high-temperature hydraulic oil in the hydraulic host is extracted by the power pump unit and sent to the cooling unit for heat exchange. The cooled hydraulic oil flows back to the hydraulic host oil tank to form a circulating cooling circuit, thereby realizing continuous cooling and constant temperature control of the hydraulic oil.

[0004] The mainstream structure of existing hydraulic cooling solutions is integrated with the hydraulic host, with the following specific structure: the cooling unit shares the base and oil circuit with the hydraulic host and cannot be separated independently; the cooling circuit is only equipped with basic cooling elements, lacking a complete overload safety protection structure and full-condition pressure monitoring components; there is no independent bypass filtration and purification branch, which can only achieve basic cooling function and cannot improve oil cleanliness; the cooling unit and the host oil circuit have no reliable quick isolation structure, and there is no independent movable design, resulting in poor installation and deployment flexibility. Utility Model Content

[0005] The purpose of this application is to provide an external cooling system for hydraulic systems in order to solve the problems mentioned above.

[0006] The technical solution adopted in this application is as follows: it includes a mobile rack assembly, the bottom of which is equipped with universal casters and fixed casters, and a push handle is installed on the side of the mobile rack assembly. The mobile rack assembly integrates a power circulation pump group, a forced air cooling heat dissipation unit, a safety overflow protection circuit, a direct cooling branch, a filter cooling branch, and a pressure intelligent monitoring unit. The lower part of the mobile rack assembly is reserved with an external quick-locking oil circuit interface. The power circulation pump group includes a drive motor, a cooling oil pump, and a filter cooling branch shut-off valve. The drive motor is coaxially connected to the cooling oil pump, the filter cooling branch shut-off valve is installed at the oil outlet of the cooling oil pump, the cooling oil pump outlet pipe is connected to the safety overflow protection circuit and the straight-through cooling branch, and the forced air cooling heat dissipation unit includes a heat dissipation fan and an air cooler. The cooling fan is mounted on the component mounting bracket on the side of the mobile rack assembly, and the air cooler is mounted on the outside of the component mounting bracket of the mobile rack assembly. The air cooler and the through cooling branch are connected in series to the main cooling oil circuit.

[0007] In a preferred embodiment, the safety overflow protection circuit includes an overflow safety valve, the oil inlet of which is connected to the outlet pipeline of the cooling oil pump, and its oil outlet is directly connected to the oil tank or the system low-pressure return oil circuit, thus forming an overpressure unloading protection circuit.

[0008] In a preferred embodiment, the through cooling branch includes a through cooling branch shut-off valve and a first check valve; The direct cooling branch shut-off valve and the first check valve are connected in series in the main cooling oil circuit, and one end of the main cooling oil circuit is connected to the cooling oil pump, and the other end is connected to the ventilation cooler.

[0009] In a preferred embodiment, the filtration cooling branch includes a second one-way valve, a two-way filtration valve assembly, and a filtration cooling branch shut-off valve. The second one-way valve, the two-way filter valve group, and the filter cooling branch shut-off valve are connected in series and then connected in parallel to both ends of the main cooling oil circuit of the straight-through cooling branch.

[0010] In a preferred embodiment, the intelligent pressure monitoring unit includes a pressure gauge, a pressure transmitter, a pressure gauge line, a pressure connector, a pressure display secondary instrument, and a pressure signal remote transmission quick connector. The pressure gauge is installed on the front of the mobile frame assembly, the pressure test connector is installed on the outlet pipeline of the cooling oil pump, the pressure test gauge wire connects the pressure test connector and the pressure gauge, and the pressure transmitter is integrated into the outlet pipeline of the cooling oil pump.

[0011] In a preferred embodiment, the external quick-lock oil circuit interface includes an inlet quick-change connector, an outlet quick-change connector, and an external oil circuit hose; The oil inlet quick-connector is connected to an external oil circuit hose, the oil return quick-connector is connected to an external oil circuit hose, and the oil inlet quick-connector and the oil return quick-connector are respectively connected to the manifold of the straight cooling branch and the filter cooling branch.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are: 1. This utility model is an independent modular movable structure, equipped with a mobile frame and casters, which can be flexibly moved and deployed without sharing a base or oil circuit with the main unit; it integrates overflow safety protection, multi-one-way valve anti-backflow protection, and all-dimensional pressure monitoring components, and is equipped with an independent filtration and cooling branch, making its functions more complete; through the combination structure of shut-off valve and quick-change connector, it can achieve rapid isolation of the oil circuit; it has dual functions of local monitoring and remote signal transmission, and can be connected to an automated control system.

[0013] 2. This utility model has multiple functions such as forced cooling, oil purification, safety protection, intelligent monitoring, and flexible movement, and can realize integrated operation of "cooling + purification + safety + intelligence"; the independent external unit does not require modification of the main unit's oil circuit, and can be matched with hydraulic equipment of different models and power, making it extremely versatile. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the external cooling system of the hydraulic system in this application; Figure 2 This is a schematic diagram showing the appearance and interface of the external cooling system of the hydraulic system in this application; Figure 3 This is a schematic diagram of the external cooling system of the hydraulic system in this application; Figure 4 This is a schematic diagram of the internal structure layout of one side of the piping arrangement of the external cooling system of the hydraulic system in this application; Figure 5 This is a schematic diagram of the internal structure of the external cooling system of the hydraulic system in this application, showing the inlet and outlet sides.

[0015] Marked in the image: 1-Mobile frame assembly, 11-Universal casters, 12-Fixed casters, 13-Push handle, 2-Power circulation pump set, 21-Drive motor, 22-Cooling oil pump, 3-Forced air cooling heat dissipation unit, 31-Air-cooled cooler, 32-Cooling fan, 4-Safety overflow protection circuit, 41-Overflow safety valve, 5-Straight-through cooling branch, 51-Straight-through cooling branch shut-off valve, 52-First check valve, 6-Filter cooling branch, 61-Second check valve, 62-Two-way filter valve assembly, 63-Filter cooling branch shut-off valve, 7-Pressure intelligent monitoring unit, 71-Pressure gauge, 72-Pressure transmitter, 73-Pressure gauge line, 74-Pressure test connector, 8-External quick-lock oil circuit interface, 81-Inlet quick-change connector, 82-Return quick-change connector, 83-External oil circuit hose, 94-Pressure display secondary instrument, 96-Component mounting bracket. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] Example

[0018] Reference Figure 1-5 An external cooling system for a hydraulic system includes a mobile frame assembly 1. The mobile frame assembly 1 is characterized by having omnidirectional casters 11 and fixed casters 12 at its bottom, and a push handle 13 mounted on its side. The mobile frame assembly 1 integrates a power circulation pump group 2, a forced air cooling unit 3, a safety overflow protection circuit 4, a direct cooling branch 5, a filter cooling branch 6, and a pressure intelligent monitoring unit 7. An external quick-locking oil circuit interface 8 is reserved at the bottom of the mobile frame assembly 1. Using the mobile frame assembly 1 as a carrier, and with the omnidirectional casters 11, fixed casters 12, and push handle 13, flexible relocation is achieved. The system integrates power, heat dissipation, overflow, control, filtration, and monitoring modules internally, and the external quick-locking oil circuit interface 8 enables rapid connection. It is independently external, highly versatile, and easy to deploy.

[0019] Reference Figure 1-5 The power circulation pump set 2 includes a drive motor 21, a cooling oil pump 22, and a filter cooling branch shut-off valve 63; The drive motor 21 is coaxially connected to the cooling oil pump 22. The filter cooling branch shut-off valve 63 is installed at the oil outlet of the cooling oil pump 22. The outlet pipe of the cooling oil pump 22 is connected to the safety overflow protection circuit 4 and the straight cooling branch 5. The drive motor 21 drives the cooling oil pump 22 to form a circulating power. The first check valve 52 and the second check valve 61 prevent oil backflow and provide a stable oil flow for the entire cooling circuit.

[0020] Reference Figure 1-5 The feature is that the forced air cooling heat dissipation unit 3 includes a heat dissipation fan 32 and an air cooler 31; The cooling fan 32 is installed on the side of the mobile rack assembly 1, and the air cooler 31 is installed on the internal pipe side of the mobile rack assembly 1. The air cooler 31 is connected to the straight cooling branch 5. The cooling fan 32 and the air cooler 31 form a strong convection cooling system, which is set in the middle to quickly cool down the high temperature oil and ensure that the oil temperature is maintained within the safe operating range.

[0021] Reference Figure 1-4 The safety overflow protection circuit 4 includes an overflow safety valve 41; The oil inlet of the overflow safety valve 41 is connected to the outlet pipeline of the cooling oil pump 22, and its outlet is directly connected to the oil tank or the low-pressure return oil circuit of the system, forming an overpressure unloading protection circuit. The overflow safety valve 41 is located at the oil pump outlet. When the oil circuit pressure exceeds the set value, it automatically opens to unload and protect the pump body, pipeline, and cooler from high pressure damage.

[0022] Reference Figure 1-4 The direct cooling branch 5 includes a direct cooling branch shut-off valve 51 and a first check valve 52; The direct cooling branch shut-off valve 51 is connected to the first check valve 52, with one end connected to the cooling oil pump 22 and the other end connected to the ventilation cooler 31. The direct cooling branch shut-off valve 51 can manually open and close the cooling oil circuit, and the first check valve 52 limits the direction of oil flow, so as to realize the controllability of the cooling circuit and prevent backflow.

[0023] Reference Figure 1-5 The filter cooling branch 6 includes a second one-way valve 61, a two-way filter valve group 62, and a filter cooling branch shut-off valve 63. After the second check valve 61, the bidirectional filter valve group 62, and the filter cooling branch shut-off valve 63 are installed, they are set at both ends of the oil circuit of the direct cooling branch 5. The second check valve 61, the bidirectional filter valve group 62, and the filter cooling branch shut-off valve 63 form a bypass to filter impurities in the oil while cooling.

[0024] Reference Figure 1-5 The intelligent pressure monitoring unit 7 includes a pressure gauge 71, a pressure transmitter 72, a pressure gauge line 73, a pressure measuring connector 74, a pressure display secondary instrument 94, and a pressure signal remote transmission quick connector. Pressure gauge 71 is installed on the front of the mobile frame assembly 1, pressure test connector 74 is installed on the outlet pipeline of cooling oil pump 22, pressure test line 73 connects pressure test connector 74 and pressure gauge 71, pressure transmitter 72 is integrated into the outlet pipeline of cooling oil pump 22, pressure gauge 71 displays pressure locally in real time, pressure transmitter 72 realizes remote data transmission, full-process monitoring of loop pressure, abnormal alarm, and intelligent management.

[0025] Reference Figure 1-4 The external quick-locking oil circuit interface 8 includes an oil inlet quick-change connector 81, an oil return quick-change connector 82, and an external oil circuit hose 83; The oil inlet quick-connector 81 is connected to the external oil line hose 83, and the oil return quick-connector 82 is connected to the external oil line hose 83. The oil inlet quick-connector 81 and the oil return quick-connector 82 are respectively connected to the manifold of the straight cooling branch 5 and the filter cooling branch 6. The oil inlet and oil return quick-connectors, together with the external oil line hose 83, enable quick insertion and removal from the main unit.

[0026] The implementation principle of an embodiment of an external cooling system for a hydraulic system in this application is as follows: Push the device to the side of the hydraulic host using the push handle 13 and swivel casters 11, and quickly connect the external oil line hose 83 to the inlet quick-connect coupling 81 and the return quick-connect coupling 82 to the host oil line to complete the quick connection and pipeline sealing.

[0027] The drive motor 21 drives the cooling oil pump 22 to operate, drawing out the hot oil from the main unit and entering the direct cooling branch 5 through the filter cooling branch shut-off valve 63. The oil passes through the air-cooled cooler 31 and is forced to cool down by the cooling fan 32. The cooled oil then flows back to the main unit oil tank through the external interface to complete the continuous circulation cooling.

[0028] When the oil pressure is too high, the overflow safety valve 41 opens to release pressure and achieve safety protection; the filter cooling branch 6 works simultaneously, and the bidirectional filter valve group 62 continuously purifies the oil and removes impurities.

[0029] The intelligent pressure monitoring unit 7 displays and uploads the oil circuit pressure in real time; when oil filtration is required, the direct cooling branch shut-off valve 51 is closed, and the oil supply cooling is carried out using the filtration cooling branch 6; after filtration is completed, the direct cooling branch shut-off valve 51 is opened to restore direct cooling.

[0030] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An external cooling system for a hydraulic system comprising a mobile frame assembly (1), characterized in that: The bottom of the mobile frame assembly (1) is provided with universal casters (11) and fixed casters (12). The side of the mobile frame assembly (1) is equipped with push handles (13). The mobile frame assembly (1) integrates a power circulation pump group (2), a forced air cooling heat dissipation unit (3), a safety overflow protection circuit (4), a direct cooling branch (5), a filter cooling branch (6), and a pressure intelligent monitoring unit (7). The lower part of the mobile frame assembly (1) is reserved with an external quick-locking oil circuit interface (8). The power circulation pump group (2) includes a drive motor (21), a cooling oil pump (22), and a filter cooling branch shut-off valve (63). The drive motor (21) is coaxially connected to the cooling oil pump (22), the filter cooling branch shut-off valve (63) is installed at the oil outlet of the cooling oil pump (22), the outlet pipe of the cooling oil pump (22) is connected to the safety overflow protection circuit (4) and the direct cooling branch (5), and the forced air cooling heat dissipation unit (3) includes a heat dissipation fan (32) and an air cooler (31). The cooling fan (32) is installed on the component mounting bracket (96) on the side of the mobile rack assembly (1), the air cooler (31) is installed on the outside of the component mounting bracket (96) of the mobile rack assembly (1), and the air cooler (31) is connected in series with the through cooling branch and the direct cooling branch (5) to the main cooling oil circuit.

2. A hydraulic system external cooling system as claimed in claim 1, characterized in that: The safety overflow protection circuit (4) includes an overflow safety valve (41). The inlet of the overflow safety valve (41) is connected to the outlet pipeline of the cooling oil pump (22), and its outlet is directly connected to the oil tank or the low-pressure return oil circuit of the system, forming an overpressure unloading protection circuit.

3. A hydraulic system external cooling system as claimed in claim 2, characterised in that: The direct cooling branch (5) includes a direct cooling branch shut-off valve (51) and a first check valve (52). The direct cooling branch shut-off valve (51) and the first check valve (52) are connected in series in the main cooling oil circuit, and one end of the main cooling oil circuit is connected to the cooling oil pump (22), and the other end is connected to the ventilation cooler (31).

4. A hydraulic system external cooling system as claimed in claim 3, characterized in that: The filter cooling branch (6) includes a second one-way valve (61), a two-way filter valve group (62), and a filter cooling branch shut-off valve (63). The second one-way valve (61), the two-way filter valve group (62), and the filter cooling branch shut-off valve (63) are connected in series and then connected in parallel to both ends of the main cooling oil circuit of the direct cooling branch (5).

5. A hydraulic system external cooling system as claimed in claim 4, characterised in that: The intelligent pressure monitoring unit (7) includes a pressure gauge (71), a pressure transmitter (72), a pressure gauge line (73), a pressure connector (74), a pressure display secondary instrument (94), and a pressure signal remote transmission quick connector. The pressure gauge (71) is installed on the front of the mobile frame assembly (1), the pressure test connector (74) is installed on the outlet pipeline of the cooling oil pump (22), the pressure test line (73) connects the pressure test connector (74) and the pressure gauge (71), and the pressure transmitter (72) is integrated into the outlet pipeline of the cooling oil pump (22).

6. A hydraulic system external cooling system as claimed in claim 5, characterised in that: The external quick-lock oil circuit interface (8) includes an oil inlet quick-change connector (81), an oil return quick-change connector (82), and an external oil circuit hose (83). The oil inlet quick-connector (81) is connected to the external oil circuit hose (83), the oil return quick-connector (82) is connected to the external oil circuit hose (83), and the oil inlet quick-connector (81) and the oil return quick-connector (82) are respectively connected to the manifold of the straight cooling branch (5) and the filter cooling branch (6).

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