CN218933281U - Cooler protector and excavator - Google Patents

Cooler protector and excavator Download PDF

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Publication number
CN218933281U
CN218933281U CN202223091204.XU CN202223091204U CN218933281U CN 218933281 U CN218933281 U CN 218933281U CN 202223091204 U CN202223091204 U CN 202223091204U CN 218933281 U CN218933281 U CN 218933281U
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China
Prior art keywords
cooler
hydraulic oil
oil
temperature
heating pipe
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CN202223091204.XU
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Chinese (zh)
Inventor
张磊
董玉忠
付志恒
房洪芹
赵灼铮
孙庆冲
贾存坤
张箭
陈钦法
刘光欣
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Xuzhou XCMG Excavator Machinery Co Ltd
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Xuzhou XCMG Excavator Machinery Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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Abstract

The utility model discloses a cooler protecting device and an excavator, which comprises a hydraulic oil tank, wherein the hydraulic oil tank is sequentially connected with a filter I, a hydraulic pump, a power device, an oil return collecting block and a cooler; a one-way valve I is also connected in parallel between the oil inlet and the oil outlet of the cooler. According to the utility model, the thermostat is used for controlling the flow direction of hydraulic oil, and when the temperature of the hydraulic oil is too low and the viscosity is large, the core body of the cooler is protected from falling; the flow direction of hydraulic oil is controlled by using the pressure-adjustable one-way valve, so that the hydraulic oil is not exploded and cracked when the core body of the cooler is blocked; the service life of the cooler is effectively prolonged; the bypass pipeline is a quick connector, so that the replacement and the maintenance are convenient; the oil temperature of hydraulic oil is rapidly increased through the electric heating pipe, and the working environment of the hydraulic working device is optimized.

Description

Cooler protector and excavator
Technical Field
The utility model relates to the technical field of engineering machinery, in particular to a cooler protecting device.
Background
Currently, hydraulic technology has been widely used in excavator equipment to provide power for work and walking. The working of the hydraulic oil needs a proper temperature range, the working temperature of the hydraulic oil is generally between 30 and 80 ℃, the too high temperature can cause the failure of a hydraulic sealing element, and the internal leakage of a hydraulic system reduces the working efficiency; the temperature is too low, so that the viscosity of the hydraulic oil is increased, the fluidity is poor, the components of a hydraulic system are damaged, particularly, when the hydraulic oil with high viscosity flows through the cooler, the hydraulic oil generates extremely large flow resistance, the cooler is subjected to pressure, when the pressure is larger than the bearing capacity of the plate fins of the cooler, the cooler fins are caused to fall down, and faults such as cooler explosion and cracking can occur when the pressure is serious. Meanwhile, when the inside of the cooler is blocked, the cooler is also subjected to explosion and cracking faults due to the excessive pressure of hydraulic oil. The method for raising the oil temperature through the pressure holding of the hydraulic system adopted at the present stage is too long in time, and the working efficiency and the use experience of the equipment are not ideal.
In order to ensure the use safety of the cooler and maintain the normal operation of the excavator equipment, the cooler structure needs to be optimized so as to meet the reliability of the cooler when the equipment is at low temperature, avoid the lodging of the cooler fins caused by overlarge internal resistance of the cooler and reduce the occurrence probability of faults such as explosion, cracking and the like of the cooler. Meanwhile, the influence on the working efficiency of the hydraulic system when the hydraulic oil is in a low-temperature state for a long time and the risk hidden trouble brought to the use safety and the service life of the hydraulic element are also considered.
Disclosure of Invention
The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide the cooler protecting device with simple structure and good effect.
The utility model is realized by the following technical scheme:
the utility model discloses a cooler protection device, which comprises a hydraulic oil tank, wherein the hydraulic oil tank is sequentially connected with a filter I, a hydraulic pump, a power device, an oil return and collection block and a cooler, a thermostat is arranged at an oil inlet of the cooler, the thermostat is sequentially connected with an oil outlet of the cooler through a proximity switch, a heating pipe and a one-way valve II, and a delay relay, a proximity switch and a thermal switch are arranged on a circuit of the heating pipe; a one-way valve I is also connected in parallel between the oil inlet and the oil outlet of the cooler; an oil outlet of the cooler is connected with a hydraulic oil tank through a filter II; the oil outlet end of the cooler is provided with a temperature sensor, and the temperature sensor is connected with a display through a controller.
It is further: marking the minimum allowable temperature of the hydraulic oil as T 0 The minimum opening temperature of the thermostat is T 0 The full-open temperature of the thermostat is T 0 +5℃。
It is further: the normally open port of the thermostat is connected with the pipeline of the heating pipe.
It is further: the proximity switch is a normally open switch.
It is further: the thermal switch is a normally closed switch.
It is further: said heatThe disconnection temperature of the sensitive switch is T 0 At a temperature higher than T 0 And the thermosensitive switch is disconnected.
It is further: and a delay relay is arranged on the connecting circuit of the proximity switch and the heating pipe and the connecting circuit of the thermosensitive switch and the heating pipe.
It is further: the one-way valve I and the one-way valve II are pressure-adjustable one-way valves.
It is further: the joints of the heating pipe oil way and the one-way valve II which are connected in parallel at the two ends of the cooler are quick-connect connectors.
The second aspect of the utility model discloses an excavator, provided with the cooler protecting device.
The utility model has the following advantages:
according to the cooler protection device, the thermostat is used for controlling the flow direction of hydraulic oil, and when the temperature of the hydraulic oil is too low and the viscosity is large, the cooler core body is protected from falling; the flow direction of hydraulic oil is controlled by using the pressure-adjustable one-way valve, so that the hydraulic oil is not exploded and cracked when the core body of the cooler is blocked; the service life of the cooler is effectively prolonged; the bypass pipeline is a quick connector, so that the replacement and the maintenance are convenient; the oil temperature of hydraulic oil is rapidly increased through the electric heating pipe, and the working environment of the hydraulic working device is optimized.
Drawings
FIG. 1 is a schematic view of the overall structure of the present utility model;
FIG. 2 is a control schematic of the present utility model;
in the figure: 1. the device comprises a hydraulic oil tank 2, a filter I, a filter 3, a hydraulic pump 4, a power device 5, an oil return collecting block 6, a proximity switch 7, a thermostat 8, a heating pipe 9, a cooler 10, a one-way valve I, a one-way valve 11, a one-way valve II, a one-way valve 12, a thermal switch 13, a filter II, a filter 14 and a temperature sensor.
Description of the embodiments
The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.
As shown in FIGS. 1 to 2The cooler protection device comprises a hydraulic oil tank 1, wherein the hydraulic oil tank 1 is sequentially connected with a filter I2, a hydraulic pump 3, a power device 4, an oil return collecting block 5 and a cooler 9, a thermostat 7 is arranged at an oil inlet of the cooler 9, the thermostat 7 is sequentially connected with an oil outlet of the cooler 9 through a proximity switch 6, a heating pipe 8 and a one-way valve II 11, and the lowest allowable temperature of hydraulic oil is marked as T 0 The minimum opening temperature of the thermostat 7 is T 0 The full-open temperature of the thermostat 7 is T 0 +5℃; the normally open port of the thermostat 7 is connected with a pipeline of the heating pipe 8; the hydraulic pump 3 of the utility model operates to generate pump suction to absorb hydraulic oil from the hydraulic oil tank 1, the hydraulic oil is filtered by the filter and then is conveyed to the power device through the hydraulic pump, namely the working motor and the working device to act and walk, the hydraulic oil in the working motor and the working device is converged by the oil return collecting block and then flows through the thermostat, because the normally open port of the thermostat is connected with the heating pipe, the oil can flow to the oil outlet of the cooler directly through the heating pipe, the opening and closing of the connecting end of the thermostat and the cooler are related to the temperature of the oil, and the minimum opening temperature of the thermostat is set as the minimum allowable temperature T of the hydraulic oil 0 The full open temperature is the maximum allowable temperature T of the hydraulic oil 0 +5℃, thus when the hydraulic oil temperature is greater than T 0 When the temperature of the hydraulic oil is too low and the viscosity is large, the core body of the cooler is protected from falling.
A cooler protecting device is shown in fig. 1-2, wherein a delay relay, a proximity switch 6 and a thermal switch 12 are arranged on the circuit of the heating pipe 8; the proximity switch 6 is a normally open switch; the thermal switch 12 is a normally closed switch; the disconnection temperature of the thermal switch 12 is T 0 . And a delay relay is arranged on the connection circuit of the proximity switch 6 and the heating pipe 8 and the connection circuit of the thermal switch 12 and the heating pipe 8. The two ends of the heating pipe are respectively connected with the proximity switch and the thermal switch, the proximity switch is a normally open switch, when oil passes, the heating pipe can be closed, the heating circuit can conduct the heating pipe to work,the heat-sensitive switch is a normally-closed switch, when the temperature is higher than T 0 When the temperature of the hydraulic oil is at a normal value, the thermal switch is turned on, the heating circuit is disconnected, and the heating pipe stops working; meanwhile, a delay relay is arranged between the proximity switch and the heating pipe as well as between the thermal switch and the heating pipe, so that the delay time can be set according to the requirement, the delay power-on and power-off of the heating pipe can be realized, and the reliability of oil heating can be ensured.
A cooler protecting device is shown in fig. 1-2, and a one-way valve I10 is also connected in parallel between an oil inlet and an oil outlet of the cooler 9; the oil outlet of the cooler 9 is connected with the hydraulic oil tank 1 through a filter II 13. Under normal conditions, hydraulic oil enters the cooler through the thermostat to be cooled, and flows to the filter through the oil outlet after being cooled by the cooler, and the temperature of the hydraulic oil is higher than T at the moment 0 The heating pipe circuit is disconnected, so that the heating pipe is disconnected, the heating pipe does not work, and returns to the hydraulic oil tank after being filtered by the filter, but when the internal resistance of the cooler is overlarge, hydraulic oil flows into the opening one-way valve from the oil inlet, so that the hydraulic oil flows to the oil outlet through the bypass pipeline, at the moment, the heating pipe does not work, the hydraulic oil flows to the filter through the oil outlet, the filtered hydraulic oil returns to the hydraulic oil tank and does not pass through the core body of the cooler, the conditions of explosion and cracking do not occur under the conditions of low resistance and large oil temperature and blockage are realized, and the service life of the cooler is effectively prolonged.
A cooler protection device as shown in fig. 1 to 2, wherein the oil outlet end of the cooler 9 is provided with a temperature sensor 14, and the temperature sensor 14 is connected with a display through a controller. The one-way valve I10 and the one-way valve II 11 are pressure-adjustable one-way valves. The joints of the oil way of the heating pipe 8 and the one-way valve II 11 which are connected in parallel at the two ends of the cooler 9 are quick connectors, and the bypass pipeline is a quick connector, so that the replacement and the maintenance are convenient. The check valve is a pressure-adjustable check valve, and the valve opening pressure can be preset before assembly, so that the allowable maximum pressure value in a pipeline is controlled, the hydraulic pipe pipeline is protected, and the service life is prolonged; the excavator operator may monitor the temperature parameter transmitted by the temperature sensor in real time through the display.
The specific working principle is as follows:
when the temperature of hydraulic oil is less than T 0 When the temperature is lower than the lowest opening temperature of the thermostat 7, the pipeline of the thermostat 7 which is communicated with the cooler is closed, hydraulic oil does not pass through the cooler and only flows to the heating pipe 8 through the thermostat 7, at the moment, the proximity switch 6 acts when detecting that stable liquid flows in, the heating pipe circuit is connected in a delayed manner, the hydraulic oil flows to the oil outlet through the one-way valve 11, and at the moment, the thermistor 12 senses that the temperature of the hydraulic oil is lower than T 0 The switch is still closed, the heating pipe 8 starts to heat, and the hydraulic oil returns to the hydraulic oil tank 1 after being filtered by the filter 13.
When the temperature of hydraulic oil is more than or equal to T 0 But < T 0 When the temperature is +5 ℃, a pipeline of the thermostat 7 leading to the cooler is opened, hydraulic oil enters the bypass pipeline heating pipe 8 and the cooler 9 after passing through the thermostat 7, part of the hydraulic oil is cooled by the cooler 9, then is converged with the hydraulic oil flowing through the bypass pipeline heating pipe 8 at an oil outlet, flows to the filter 13 through the oil outlet, at the moment, the proximity switch is still closed, the thermal switch 12 acts, the circuit of the heating pipe 8 is closed, the heating pipe does not work, and the hydraulic oil returns to the hydraulic oil tank 1 after being filtered by the filter 13.
When the temperature of hydraulic oil is more than or equal to T0+5 ℃, the hydraulic oil enters the cooler 9 through the thermostat 7, after being cooled by the cooler 9, the hydraulic oil flows to the filter 13 through the oil outlet, at the moment, the proximity switch is turned off in a delayed manner, the thermal switch 12 keeps acting, the circuit of the heating pipe 8 is closed, the heating pipe does not work, and the hydraulic oil returns to the hydraulic oil tank 1 after being filtered by the filter 13.
According to the cooler protecting device, by adding the components such as the adjustable pressure type one-way valve, the bypass pipeline, the thermostat, the heating pipe, the proximity switch and the thermal switch, when the resistance of hydraulic oil flowing through the cooler core body from the oil inlet is overlarge, part or all of the hydraulic oil flows to the oil outlet through the bypass pipeline, so that the cooler core body is protected; meanwhile, the hydraulic oil temperature is quickly increased at low temperature, the service life of the cooler of the excavator is prolonged, and the normal operation and the use safety of a hydraulic system are ensured; the rapid temperature rise and protection of the cooler at low temperature are realized, the lodging of the cooler fins caused by overlarge internal resistance of the cooler is avoided, the explosion and cracking faults of the cooler are effectively reduced, and the working environment of the hydraulic working device is optimized.
Finally, it should be noted that: the foregoing description is only a preferred example of the present utility model and is not intended to limit the present utility model, but although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A cooler shield apparatus, characterized in that: the intelligent oil tank comprises a hydraulic oil tank (1), wherein the hydraulic oil tank (1) is sequentially connected with a filter I (2), a hydraulic pump (3), a power device (4), an oil return and collection block (5) and a cooler (9), a thermostat (7) is arranged at an oil inlet of the cooler (9), the thermostat (7) is sequentially connected with an oil outlet of the cooler (9) through a proximity switch (6), a heating pipe (8) and a one-way valve II (11), and a delay relay, the proximity switch (6) and a thermal switch (12) are arranged on a circuit of the heating pipe (8); a one-way valve I (10) is also connected in parallel between the oil inlet and the oil outlet of the cooler (9); an oil outlet of the cooler (9) is connected with the hydraulic oil tank (1) through a filter II (13); the oil outlet end of the cooler (9) is provided with a temperature sensor (14), and the temperature sensor (14) is connected with a display through a controller.
2. A chiller guard as claimed in claim 1 wherein: marking the minimum allowable temperature of the hydraulic oil as T 0 The minimum opening temperature of the thermostat (7) is T 0 The full-open temperature of the thermostat (7) is T 0 +5℃。
3. A chiller guard as claimed in claim 1 wherein: the normally open port of the thermostat (7) is connected with the pipeline of the heating pipe (8).
4. A chiller guard as claimed in claim 1 wherein: the proximity switch (6) is a normally open switch.
5. A chiller guard as claimed in claim 1 wherein: the thermal switch (12) is a normally closed switch.
6. A chiller guard as set forth in claim 5 wherein: the disconnection temperature of the thermal switch (12) is T 0 At a temperature higher than T 0 The time-sensitive switch (12) is opened.
7. A chiller guard as claimed in claim 1 wherein: and a delay relay is arranged on the connection circuit of the proximity switch (6) and the heating pipe (8) and the connection circuit of the thermosensitive switch (12) and the heating pipe (8).
8. A chiller guard as claimed in claim 1 wherein: the one-way valve I (10) and the one-way valve II (11) are pressure-adjustable one-way valves.
9. A chiller guard as claimed in claim 1 wherein: the joints of the oil way of the heating pipe (8) and the one-way valve II (11) which are connected in parallel at the two ends of the cooler (9) are quick-connect joints.
10. An excavator, characterized in that: a chiller guard as claimed in any one of claims 1 to 9 mounted thereto.
CN202223091204.XU 2022-11-17 2022-11-17 Cooler protector and excavator Active CN218933281U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223091204.XU CN218933281U (en) 2022-11-17 2022-11-17 Cooler protector and excavator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223091204.XU CN218933281U (en) 2022-11-17 2022-11-17 Cooler protector and excavator

Publications (1)

Publication Number Publication Date
CN218933281U true CN218933281U (en) 2023-04-28

Family

ID=86065762

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202223091204.XU Active CN218933281U (en) 2022-11-17 2022-11-17 Cooler protector and excavator

Country Status (1)

Country Link
CN (1) CN218933281U (en)

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