Impact-free switching cooling oil way system

Abstract

The embodiment of the utility model relates to the technical field of hydraulic equipment, in particular to a non-impact switching cooling oil way system which is characterized in that an oil inlet of a first slave motor pump set is in butt joint with an oil tank through a pipeline I; an oil inlet of the first pump opening one-way valve is connected with an oil outlet of the first slave motor pump set through a pipeline II; an oil inlet of the cooling oil inlet valve is connected with an oil outlet of the first pump opening one-way valve through a pipeline III; an oil inlet of the one-way stop valve is connected with an oil outlet of the first pump opening one-way valve through a pipeline 9, and an oil outlet of the one-way stop valve is connected with the main system through a pipeline 10; and an oil inlet of the cooler is connected with an oil outlet of the cooling oil inlet valve through a pipeline IV. According to the shock-free switching cooling oil way system, the pressure relief assembly is arranged on the portion, in front of the cooling oil inlet valve, of the third pipeline, the pressure relief assembly can conduct pressure relief on oil in the third pipeline before the cooling oil inlet valve is opened, and the oil subjected to pressure relief cannot impact the cooler at the moment when the cooling oil inlet valve is opened.

Description

Technical Field

[0001] The embodiments of this specification relate to the technical field of hydraulic equipment, and specifically to a shock-free switching cooling oil circuit system. Background Art

[0002] During the operation of the die-casting machine, there will be loss in the energy transfer process. Most of the lost energy is released in the form of heat energy. Due to the presence of the aluminum liquid holding furnace, the working environment temperature of the die-casting machine is very high, and it is difficult to remove the heat by air cooling. Therefore, water cooling and oil cooling are often used to cool the die-casting machine.

[0003] For oil cooling, existing technologies include a slave motor pump assembly, a cooling oil inlet valve, and a one-way shutoff valve. In the first operating mode (i.e., when the main system requires a large amount of oil), the cooling oil inlet valve closes, the one-way shutoff valve opens, and the slave motor pump assembly assists the main motor pump assembly in delivering oil to the main system. In the second operating mode (i.e., when the main system does not require a large amount of oil), the one-way shutoff valve closes, the cooling oil inlet valve opens, and the slave motor pump assembly delivers oil to the cooler, while the main motor pump assembly continues to deliver oil to the main system.

[0004] When the first working mode switches to the second working mode, that is, at the moment when the one-way stop valve is closed and the cooling oil inlet valve is opened, the high-pressure oil in the pipeline will instantly pass through the cooling oil inlet valve to cause an impact on the cooler. In the long run, the cooler will be damaged, thereby reducing the service life of the cooler. Utility Model Content

[0005] In view of the shortcomings of the prior art, the embodiments of this specification propose a shock-free switching cooling oil circuit system, including:

[0006] The first slave motor pump unit has its oil inlet connected to the oil tank through a pipe 1;

[0007] A first pump port one-way valve, the oil inlet of which is connected to the oil outlet of the first slave motor pump group through a second pipeline;

[0008] The cooling oil inlet valve has its oil inlet connected to the oil outlet of the first pump port check valve through pipeline three;

[0009] A one-way stop valve, the oil inlet of which is connected to the oil outlet of the first pump port one-way valve via pipeline 9, and the oil outlet of the one-way stop valve is connected to the main system via pipeline 10;

[0010] The oil inlet of the cooler is connected to the oil outlet of the cooling oil inlet valve through pipe 4, and the oil outlet of the cooler is connected to the oil tank through pipe 5;

[0011] The pressure relief component is connected to pipeline three and is used to reduce the oil pressure value of the oil in pipeline three before the cooling oil inlet valve is opened.

[0012] Preferably, the pressure relief assembly comprises:

[0013] The oil inlet of the oil leakage damper is connected to the pipeline three, and the oil outlet of the oil leakage damper is connected to the oil tank through the pipeline six.

[0014] Preferably, the pressure relief assembly comprises:

[0015] The oil drain valve has an oil inlet connected to pipeline three, an oil outlet connected to the oil tank through pipeline six, and the oil drain valve is electrically connected to the one-way stop valve through a controller.

[0016] Preferably, the pressure relief assembly further comprises:

[0017] The pressure sensor is connected to the pipeline three, and the pressure sensor is electrically connected to the cooling oil inlet valve through the controller.

[0018] Preferably, the pressure relief assembly further comprises:

[0019] The timer is electrically connected to the one-way stop valve through the controller, and the timer is electrically connected to the cooling oil inlet valve through the controller.

[0020] Preferably, the shockless switching cooling oil circuit system further includes:

[0021] The oil inlet of the cooling overflow valve is connected to pipeline four, and the oil outlet of the cooling overflow valve is connected to pipeline six.

[0022] Preferably, the shockless switching cooling oil circuit system further includes:

[0023] The oil temperature sensor is installed on the oil tank and is electrically connected to the first slave motor pump group through the controller.

[0024] Preferably, the shockless switching cooling oil circuit system further includes:

[0025] The oil inlet of the second slave motor pump unit is connected to the oil tank through pipe seven;

[0026] The oil inlet of the second pump port one-way valve is connected to the oil outlet of the second slave motor pump group through pipeline eight, and the oil outlet of the second pump port one-way valve is connected to pipeline nine.

[0027] Preferably, the shockless switching cooling oil circuit system further includes:

[0028] The oil inlet of the main motor pump group is connected to the oil tank through pipeline 11, and the oil outlet of the main motor pump group is connected to pipeline 10 through pipeline 12.

[0029] Preferably, the shockless switching cooling oil circuit system further includes:

[0030] a first relief valve, the oil inlet of which is connected to a pipe 12, and the oil outlet of which is connected to the oil tank via a pipe 13;

[0031] a second relief valve, the oil inlet of which is connected to pipeline 8, and the oil outlet of the second relief valve is connected to pipeline 13;

[0032] The oil inlet of the third overflow valve is connected to the second pipeline, and the oil outlet of the third overflow valve is connected to the thirteenth pipeline.

[0033] Beneficial effects

[0034] The shock-free switching cooling oil circuit system of the embodiment of this specification is equipped with a pressure relief component on pipe three in front of the cooling oil inlet valve. The pressure relief component can relieve the pressure of the oil in pipe three before the cooling oil inlet valve is opened. The oil after pressure relief will not cause impact on the cooler at the moment the cooling oil inlet valve is opened, and will not cause damage to the cooler, thereby ultimately extending the service life of the cooler.

[0035] Further or more detailed beneficial effects will be described in conjunction with specific examples in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic structural diagram of the shockless switching cooling oil circuit system in the embodiment of this specification. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0038] Example 1:

[0039] This embodiment provides a shock-free switching cooling oil circuit system. Figure 1 As shown, it includes: a first slave motor pump group 3, a first pump port one-way valve 8, a cooling oil inlet valve 11, a one-way stop valve 9, a cooler 14 and a pressure relief component.

[0040] The oil inlet of the first slave motor pump group 3 is connected to the oil tank 16 through pipeline one. The oil inlet of the first pump port one-way valve 8 is connected to the oil outlet of the first slave motor pump group 3 through pipeline two. The oil inlet of the cooling oil inlet valve 11 is connected to the oil outlet of the first pump port one-way valve 8 through pipeline three. The oil inlet of the one-way stop valve 9 is connected to the oil outlet of the first pump port one-way valve 8 through pipeline nine, and the oil outlet of the one-way stop valve 9 is connected to the main system through pipeline ten. The oil inlet of the cooler 14 is connected to the oil outlet of the cooling oil inlet valve 11 through pipeline four, and the oil outlet of the cooler 14 is connected to the oil tank 16 through pipeline five. The pressure relief assembly is connected to pipeline three, and the pressure relief assembly is used to reduce the oil pressure value of the oil in pipeline three before the cooling oil inlet valve 11 is opened.

[0041] like Figure 1 As shown, the shockless switching cooling oil circuit system of this embodiment further includes: a main motor pump group 1.

[0042] The oil inlet of the main motor pump group 1 is connected to the oil tank 16 through the pipeline 11, and the oil outlet of the main motor pump group 1 is connected to the pipeline 10 through the pipeline 12.

[0043] When the master system requires a large amount of oil, master motor pump unit 1 starts, and the oil in oil tank 16 flows through master motor pump unit 1 to supply the master system. Simultaneously, one-way shut-off valve 9 opens (while cooling oil inlet valve 11 is closed), and the first slave motor pump unit 3 starts. The oil in oil tank 16 flows sequentially through the first slave motor pump unit 3, the first pump port one-way valve 8, and the one-way shut-off valve 9 to supply the master system. In other words, the master motor pump unit 1 and the first slave motor pump unit 3 together supply the master system with oil, thereby ensuring that the master system's oil requirements are met.

[0044] When the main system does not require a large amount of oil, the main motor pump assembly 1 continues to operate, and the oil in the oil tank 16 passes through the main motor pump assembly 1 to provide oil to the main system. The first slave motor pump assembly 3 no longer provides oil to the main system, and the first slave motor pump assembly 3 and the one-way stop valve 9 can be closed. During this period, the first slave motor pump assembly 3 can be used to provide power for oil cooling. Specifically, the cooling oil inlet valve 11 is opened (the one-way stop valve 9 is closed at this time), the first slave motor pump assembly 3 is started, and the oil in the oil tank 16 passes through the first slave motor pump assembly 3, the first pump port one-way valve 8, and the cooling oil inlet valve 11 in sequence to reach the cooler 14. The oil cooled by the cooler 14 then returns to the oil tank 16.

[0045] To prevent the high-pressure oil in pipeline 3 from impacting the cooler 14 when the cooling oil inlet valve 11 opens, this embodiment provides a pressure relief assembly on pipeline 3. This assembly reduces the oil pressure in pipeline 3 (i.e., relieves the oil pressure) before the cooling oil inlet valve 11 opens. This relieved oil prevents impact on the cooler 14 when the cooling oil inlet valve 11 opens (or at least effectively mitigates the impact on the cooler 14), preventing damage to the cooler and ultimately extending its service life.

[0046] Further, such as Figure 1 As shown, the pressure relief assembly includes: an oil leakage damper 12 and a pressure sensor 10 .

[0047] The oil inlet of the oil drain damper 12 is connected to the pipeline 3, and the oil outlet of the oil drain damper 12 is connected to the oil tank 16 through the pipeline 6. The pressure sensor 10 is connected to the pipeline 3, and the pressure sensor 10 is electrically connected to the cooling oil inlet valve 11 through the controller.

[0048] When the oil pressure value in pipeline three is higher than the oil pressure value in pipeline six, the oil in pipeline three will automatically flow to pipeline six through the oil drain damper 12, thereby reducing the oil pressure value in pipeline three. The pressure sensor 10 can automatically obtain the real-time oil pressure value of the oil in pipeline three and send the obtained real-time oil pressure value to the controller. After receiving the real-time oil pressure value, the controller will compare the real-time oil pressure value with the preset oil pressure threshold. When the real-time oil pressure value is less than or equal to the preset oil pressure threshold, the controller will control the cooling oil inlet valve 11 to open. When the oil pressure value in pipeline three is less than or equal to the preset oil pressure threshold, the cooling oil inlet valve 11 opens at the moment, and the oil in pipeline three will not cause impact on the cooler 14.

[0049] Furthermore, although the oil pressure in pipeline 3 is consistently higher than that in pipeline 6 while the first slave motor pump unit 3 is supplying oil to the master system, meaning that the oil in pipeline 3 will automatically flow into pipeline 6 through the oil drain damper 12, the first slave motor pump unit 3 will continue to supply oil to the pipeline, and the amount of oil drained by the oil drain damper 12 is negligible compared to the amount of oil supplied by the first slave motor pump unit 3. Therefore, the provision of the oil drain damper 12 will not affect the supply of oil to the master system by the first slave motor pump unit 3.

[0050] Further, such as Figure 1 As shown, the shockless switching cooling oil circuit system of this embodiment further includes: a cooling overflow valve 13.

[0051] The oil inlet of the cooling relief valve 13 is connected to pipe 4, and the oil outlet of the cooling relief valve 13 is connected to pipe 6. The cooling relief valve 13 is connected in parallel with the cooler 14. When the oil inlet pressure of the cooler 14 is too high, the cooling relief valve 13 can drain the oil back to the oil tank 16, thereby protecting the cooler 14.

[0052] Further, such as Figure 1 As shown, the shockless switching cooling oil circuit system of this embodiment further includes: an oil temperature sensor 15.

[0053] The oil temperature sensor 15 is installed on the oil tank 16, and the oil temperature sensor 15 is electrically connected to the first slave motor pump group 3 through the controller. The oil temperature sensor 15 can detect the oil temperature in the oil tank 16 in real time and send the detected oil temperature value to the controller. When the oil temperature value in the oil tank 16 is lower than the first preset temperature threshold, the controller can control the first slave motor pump group 3 to pause, thereby reducing energy consumption; when the oil temperature value in the oil tank 16 is higher than the second preset temperature threshold, the controller controls the first slave motor pump group 3 to start to cool the oil. And within a reasonable speed range, the speed of the first slave motor pump group 3 can increase as the oil temperature value increases, saving energy consumption as much as possible while effectively cooling the oil.

[0054] Further, such as Figure 1 As shown, the shockless switching cooling oil circuit system of this embodiment further includes: a second slave motor pump group 2 and a second pump port one-way valve 7.

[0055] The oil inlet of the second slave motor pump group 2 is connected to the oil tank 16 through pipeline 7. The oil inlet of the second pump port check valve 7 is connected to the oil outlet of the second slave motor pump group 2 through pipeline 8, and the oil outlet of the second pump port check valve 7 is connected to pipeline 9.

[0056] In actual use, the specific number of motor pump groups can be set according to actual use requirements. Figure 1 As shown, this embodiment, in addition to the first slave motor pump unit 3 and the first pump port check valve 8, also includes a second slave motor pump unit 2 and a second pump port check valve 7. When the master system requires a large amount of oil, the second slave motor pump unit 2 and the first slave motor pump unit 3 can be started simultaneously, or only the second slave motor pump unit 2 or only the first slave motor pump unit 3 can be started. When the oil is cooled, the second slave motor pump unit 2 and the first slave motor pump unit 3 can be started simultaneously, or only the second slave motor pump unit 2 or only the first slave motor pump unit 3 can be started.

[0057] The provision of the second slave motor pump group 2 and the second pump port one-way valve 7 makes the applicable scenarios of the shock-free switching cooling oil circuit system more diverse.

[0058] Further, such as Figure 1 As shown, the shockless switching cooling oil circuit system of this embodiment further includes: a first relief valve 4 , a second relief valve 5 and a third relief valve 6 .

[0059] The oil inlet of the first relief valve 4 is connected to pipeline 12, and the oil outlet of the first relief valve 4 is connected to the oil tank 16 via pipeline 13. The oil inlet of the second relief valve 5 is connected to pipeline 8, and the oil outlet of the second relief valve 5 is connected to pipeline 13. The oil inlet of the third relief valve 6 is connected to pipeline 2, and the oil outlet of the third relief valve 6 is connected to pipeline 13. The first relief valve 4, the second relief valve 5, and the third relief valve 6 are respectively arranged at the outlets of the main motor pump group 1, the second slave motor pump group 2, and the first slave motor pump group 3. When the oil outlet pressure of the main motor pump group 1 and / or the second slave motor pump group 2 and / or the first slave motor pump group 3 is too high, the first relief valve 4, the second relief valve 5, and the third relief valve 6 can drain the oil back to the oil tank 16, thereby protecting the main motor pump group 1, the second slave motor pump group 2, and the first slave motor pump group 3.

[0060] Example 2:

[0061] A shock-free switching cooling oil circuit system is different from Example 1 in that the pressure relief component includes: an oil relief valve and a pressure sensor 10.

[0062] The oil inlet of the oil drain valve is connected to pipeline 3, and the oil outlet of the oil drain valve is connected to the oil tank 16 through pipeline 6. The oil drain valve is electrically connected to the one-way stop valve 9 through the controller. The pressure sensor 10 is connected to pipeline 3 and is electrically connected to the cooling oil inlet valve 11 through the controller.

[0063] When one-way stop valve 9 is closed, the controller controls the oil drain valve to open. At this point, the oil in pipeline 3 flows through the oil drain valve into pipeline 6, thereby reducing the oil pressure in pipeline 3. Pressure sensor 10 automatically acquires the real-time oil pressure of pipeline 3 and transmits it to the controller. Upon receiving the real-time oil pressure, the controller compares it with a preset oil pressure threshold. When the real-time oil pressure is less than or equal to the preset oil pressure threshold, the controller controls the cooling oil inlet valve 11 to open and the oil drain valve to close.

[0064] Example 3:

[0065] A shock-free switching cooling oil circuit system is different from Example 1 in that the pressure relief component includes: an oil relief damper 12 and a timer.

[0066] The oil inlet of the oil drain damper 12 is connected to the pipeline 3, and the oil outlet of the oil drain damper 12 is connected to the oil tank 16 through the pipeline 6. The timer is electrically connected to the one-way stop valve 9 through the controller, and the timer is electrically connected to the cooling oil inlet valve 11 through the controller.

[0067] When the oil pressure in pipe 3 exceeds that in pipe 6, the oil in pipe 3 automatically flows into pipe 6 through oil drain damper 12, thereby reducing the oil pressure in pipe 3. When one-way shut-off valve 9 closes, the controller starts a timer. When the timer reaches a preset threshold, the controller opens cooling inlet valve 11. When the timer reaches the preset threshold, it indicates that oil drain damper 12 has been relieving oil pressure for a sufficient period of time. At this point, when cooling inlet valve 11 opens, the oil in pipe 3 will not impact cooler 14.

[0068] Example 4:

[0069] A shock-free switching cooling oil circuit system is different from Example 1 in that the pressure relief component includes: an oil relief valve and a timer.

[0070] The oil inlet of the oil drain valve is connected to pipeline 3, and the oil outlet of the oil drain valve is connected to the oil tank 16 through pipeline 6. The oil drain valve is electrically connected to the one-way stop valve 9 through the controller. The timer is electrically connected to the one-way stop valve 9 through the controller, and the timer is electrically connected to the cooling oil inlet valve 11 through the controller.

[0071] When one-way stop valve 9 is closed, the controller controls the oil drain valve to open. At this point, the oil in pipe 3 flows through the oil drain valve into pipe 6, thereby reducing the oil pressure in pipe 3. Simultaneously, when one-way stop valve 9 is closed, the controller controls a timer to start timing. When the timer reaches a preset threshold, the controller controls the cooling oil inlet valve 11 to open and the oil drain valve to close.

[0072] The above embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the concept and scope of the present invention. Any modifications and improvements to the technical solution of the present invention made by a person of ordinary skill in the art without departing from the design concept of the present invention shall fall within the scope of protection of the present invention. The technical content sought to be protected by the present invention is fully set forth in the claims.

Claims

1. A shock-free switching cooling oil circuit system, characterized in that: include: The first slave motor pump unit (3) has an oil inlet connected to the oil tank (16) via a first pipe; A first pump port one-way valve (8), the oil inlet of which is connected to the oil outlet of the first slave motor pump unit (3) via a second pipeline; A cooling oil inlet valve (11), the oil inlet of which is connected to the oil outlet of the first pump port one-way valve (8) via a pipeline three; A one-way stop valve (9), the oil inlet of which is connected to the oil outlet of the first pump port one-way valve (8) via a pipeline nine, and the oil outlet of the one-way stop valve (9) is connected to the main system via a pipeline ten; A cooler (14), the oil inlet of which is connected to the oil outlet of the cooling oil inlet valve (11) via a fourth pipe, and the oil outlet of the cooler (14) is connected to the oil tank (16) via a fifth pipe; A pressure relief component connected to the pipeline three, the pressure relief component is used to reduce the oil pressure value of the oil in the pipeline three before the cooling oil inlet valve (11) is opened; Wherein, the pressure relief component includes: An oil drain damper (12), the oil inlet of which is connected to the pipeline three, and the oil outlet of the oil drain damper (12) is connected to the oil tank (16) through the pipeline six; Alternatively, the pressure relief assembly comprises: An oil drain valve, the oil inlet of which is connected to the pipeline three, the oil outlet of which is connected to the oil tank (16) via the pipeline six, and the oil drain valve is electrically connected to the one-way stop valve (9) via a controller.

2. The shockless switching cooling oil circuit system according to claim 1, characterized in that: The pressure relief assembly further comprises: A pressure sensor (10) is connected to the pipeline 3, and the pressure sensor (10) is electrically connected to the cooling oil inlet valve (11) through a controller.

3. The shockless switching cooling oil circuit system according to claim 1, characterized in that: The pressure relief assembly further comprises: A timer is electrically connected to the one-way stop valve (9) through a controller, and the timer is electrically connected to the cooling oil inlet valve (11) through a controller.

4. The shockless switching cooling oil circuit system according to claim 1, characterized in that: The shockless switching cooling oil circuit system further includes: The oil inlet of the cooling overflow valve (13) is connected to the pipeline 4, and the oil outlet of the cooling overflow valve (13) is connected to the pipeline 6.

5. The shockless switching cooling oil circuit system according to claim 1, characterized in that: The shockless switching cooling oil circuit system further includes: An oil temperature sensor (15) is mounted on the oil tank (16), and the oil temperature sensor (15) is electrically connected to the first slave motor pump group (3) through a controller.

6. The shockless switching cooling oil circuit system according to claim 1, characterized in that: The shockless switching cooling oil circuit system further includes: The oil inlet of the second slave motor pump unit (2) is connected to the oil tank (16) via a pipe 7; The oil inlet of the second pump port one-way valve (7) is connected to the oil outlet of the second slave motor pump group (2) through the pipeline eight, and the oil outlet of the second pump port one-way valve (7) is connected to the pipeline nine.

7. The shockless switching cooling oil circuit system according to claim 6, characterized in that: The shockless switching cooling oil circuit system further includes: The main motor pump group (1) has an oil inlet connected to the oil tank (16) through a pipeline 11, and an oil outlet of the main motor pump group (1) is connected to the pipeline 10 through a pipeline 12.

8. The shockless switching cooling oil circuit system according to claim 7, characterized in that: The shockless switching cooling oil circuit system further includes: A first overflow valve (4), the oil inlet of which is connected to the pipeline 12, and the oil outlet of the first overflow valve (4) is connected to the oil tank (16) through the pipeline 13; a second overflow valve (5), the oil inlet of which is connected to the pipeline 8, and the oil outlet of the second overflow valve (5) is connected to the pipeline 13; The oil inlet of the third overflow valve (6) is connected to the pipeline 2, and the oil outlet of the third overflow valve (6) is connected to the pipeline 13.

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