Hydraulic oil cooling system of coke guide

Abstract

The utility model belongs to the field of coke barriers, and relates to a hydraulic oil cooling system of a coke barrier. Hydraulic oil entering the hydraulic cylinder can be cooled, and the working temperature of the hydraulic oil in the hydraulic cylinder is kept between 30 DEG C and 60 DEG C. The technical scheme comprises a refrigeration unit, a first heat exchanger and a second heat exchanger. And the refrigeration unit is fixed on the coke barrier car. A hot fluid inlet of the first heat exchanger is communicated with an oil outlet of a hydraulic cylinder of the coke barrier, a hot fluid outlet of the first heat exchanger is communicated with a hydraulic oil tank of the coke barrier, a cold fluid inlet of the first heat exchanger is communicated with the output end of the refrigeration unit, and a cold fluid outlet of the first heat exchanger is communicated with the input end of the refrigeration unit. The second heat exchanger is a copper pipe fitting and is arranged in the oil pipe close to the oil inlet of the hydraulic cylinder, one end of the second heat exchanger communicates with the output end of the refrigeration unit, and the other end of the second heat exchanger communicates with the input end of the refrigeration unit.

Description

Technical Field

[0001] This utility model belongs to the field of coke quenching machines and relates to a hydraulic oil cooling system for coke quenching machines. Background Technology

[0002] The coke quenching car operates close to the coke oven, and the ambient temperature is generally between 50℃ and 80℃. However, the temperature near the oven door can reach 100℃ to 200℃. The hydraulic oil temperature of the coke quenching car's hydraulic system should be between 30℃ and 60℃, and should not exceed 80℃. Otherwise, the viscosity of the hydraulic oil will decrease, and the oil film inside the hydraulic cylinder and on the piston surface will become too thin, which can easily lead to a reduction in the life of the hydraulic cylinder and cause problems such as hydraulic oil oxidation.

[0003] To maintain the hydraulic oil temperature of the coke quenching car's hydraulic system at 30℃~60℃, a refrigeration device is required to cool the hydraulic oil.

[0004] However, while current hydraulic system cooling equipment can effectively reduce hydraulic oil temperature by increasing power, it has been found in practice that hydraulic cylinders still experience excessively rapid wear. Analysis revealed that the hydraulic oil in the tank, after being cooled, enters the hydraulic cylinder through a long pipeline. Under the influence of high ambient temperature and pressure, the hydraulic oil temperature rises rapidly, remaining above 60°C for extended periods, and in severe cases exceeding 80°C. This prevents the hydraulic system's cooling equipment from effectively cooling the hydraulic oil within the cylinder. Utility Model Content

[0005] To overcome the deficiencies in the aforementioned related technologies, this utility model proposes a hydraulic oil cooling system for a coke quenching car, which can cool the hydraulic oil entering the hydraulic cylinder and maintain the working temperature of the hydraulic oil in the hydraulic cylinder between 30℃ and 60℃.

[0006] To achieve the above technical objectives, this utility model provides a hydraulic oil cooling system for a coke quenching car. The coke quenching car hydraulic oil cooling system includes a refrigeration unit, a first heat exchanger, and a second heat exchanger. The refrigeration unit is fixed to the coke quenching car. The hot fluid inlet of the first heat exchanger is connected to the oil outlet of the hydraulic cylinder of the coke quenching car, the hot fluid outlet of the first heat exchanger is connected to the hydraulic oil tank of the coke quenching car, the cold fluid inlet of the first heat exchanger is connected to the output end of the refrigeration unit, and the cold fluid outlet of the first heat exchanger is connected to the input end of the refrigeration unit. The second heat exchanger is a copper pipe fitting, disposed in an oil pipe near the oil inlet of the hydraulic cylinder, with one end of the second heat exchanger connected to the output end of the refrigeration unit and the other end connected to the input end of the refrigeration unit.

[0007] Preferably, the refrigeration unit includes: a refrigeration mechanism, a cooling oil tank, and a cooling oil drive pump. The refrigeration mechanism includes an evaporator. The cooling oil tank is filled with cooling oil, the evaporator is disposed within the cooling oil tank, and the cold fluid outlet of the first heat exchanger is connected to the cooling oil tank. The input end of the cooling oil drive pump is connected to the cooling oil tank, the output end of the cooling oil drive pump is connected to the cold fluid inlet of the first heat exchanger, one end of the second heat exchanger is connected to the output end of the cooling oil drive pump, and the other end of the second heat exchanger is connected to the cooling oil tank.

[0008] Preferably, the refrigeration unit includes: a first flow regulating valve, a second flow regulating valve, a temperature sensor, and a controller. The first flow regulating valve is installed on the pipeline between the output end of the cooling oil drive pump and the cold fluid inlet of the first heat exchanger. The second flow regulating valve is installed on the pipeline between the output end of the cooling oil drive pump and one end of the second heat exchanger. The temperature sensor is fixed at the oil inlet of the hydraulic cylinder and is configured to collect the temperature of the oil inlet of the hydraulic cylinder. The controller is electrically connected to the first flow regulating valve, the second flow regulating valve, the temperature sensor, and the cooling oil drive pump.

[0009] Preferably, the hydraulic cylinders of the coke quenching car include: a furnace door driving hydraulic cylinder and a coke guide grid driving hydraulic cylinder. A second heat exchanger is fixedly installed in the oil pipe connected to the oil inlet of the furnace door driving hydraulic cylinder and in the oil pipe connected to the oil inlet of the coke guide grid driving hydraulic cylinder, respectively. The second heat exchanger is a straight pipe, and hemispheres are fixed to both ends of the second heat exchanger, sealing the openings at both ends of the second heat exchanger. The diameter of the second heat exchanger is half the inner diameter of the oil pipe. The two ends of the sidewall of the second heat exchanger are connected to the output end of the cooling oil driving pump and the cooling oil tank respectively through pipe fittings passing through the oil pipe.

[0010] Preferably, the refrigeration unit further includes a support ring, which includes two annular components and a fixing block. The two annular components are coaxially fitted together, and the outer wall of one annular component is fixedly connected to the inner wall of the oil pipe. The inner wall of the other annular component is fixedly connected to the side wall of the second heat exchanger. At least two fixing blocks are fixed between the two annular components.

[0011] Preferably, the cross-sectional area of ​​the oil passage between the two annular parts and the fixing block of the support ring is greater than or equal to the oil inlet area of ​​the furnace door driving hydraulic cylinder or the oil inlet area of ​​the coke guide grid driving hydraulic cylinder.

[0012] The beneficial effects of this utility model are as follows:

[0013] This invention employs a second heat exchanger, which can directly cool the hydraulic oil that is about to enter the hydraulic cylinder, preventing the hydraulic oil temperature from rising after passing through the oil pipe. This ensures that the hydraulic oil in the hydraulic cylinder operates within the range of 30℃ to 60℃, reducing the output power of the refrigeration unit while maintaining the working temperature of the hydraulic oil in the hydraulic cylinder within a suitable range. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a structural diagram of the present invention;

[0016] Figure 2 This is a structural diagram of the refrigeration unit of this utility model;

[0017] Figure 3 This is a structural diagram of the second heat exchanger of this utility model;

[0018] Figure 4 This is a structural diagram of the support ring of this utility model. Detailed Implementation

[0019] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] like Figures 1 to 4 As shown, this utility model provides a hydraulic oil cooling system for a coke quenching car. The coke quenching car hydraulic oil cooling system includes: a refrigeration unit 1, a first heat exchanger 2, and a second heat exchanger 3. The refrigeration unit 1 is fixed to the coke quenching car. The hot fluid inlet of the first heat exchanger 2 is connected to the oil outlet of the hydraulic cylinder of the coke quenching car, the hot fluid outlet of the first heat exchanger 2 is connected to the hydraulic oil tank of the coke quenching car, the cold fluid inlet of the first heat exchanger 2 is connected to the output end of the refrigeration unit 1, and the cold fluid outlet of the first heat exchanger 2 is connected to the input end of the refrigeration unit 1. The second heat exchanger 3 is a copper pipe fitting, disposed in an oil pipe near the oil inlet of the hydraulic cylinder, with one end of the second heat exchanger 3 connected to the output end of the refrigeration unit 1 and the other end of the second heat exchanger 3 connected to the input end of the refrigeration unit 1.

[0023] Preferably, the refrigeration unit 1 includes: a refrigeration mechanism 11, a cooling oil tank 12, and a cooling oil drive pump 13. The refrigeration mechanism 11 includes an evaporator. The cooling oil tank 12 is filled with cooling oil, the evaporator is disposed within the cooling oil tank 12, and the cold fluid outlet of the first heat exchanger 2 is connected to the cooling oil tank 12. The input end of the cooling oil drive pump 13 is connected to the cooling oil tank 12, the output end of the cooling oil drive pump 13 is connected to the cold fluid inlet of the first heat exchanger 2, one end of the second heat exchanger 3 is connected to the output end of the cooling oil drive pump 13, and the other end of the second heat exchanger 3 is connected to the cooling oil tank 12.

[0024] Preferably, the refrigeration unit 1 includes: a first flow regulating valve 14, a second flow regulating valve 15, a temperature sensor, and a controller. The first flow regulating valve 14 is installed on the pipeline between the output end of the cooling oil drive pump 13 and the cold fluid inlet of the first heat exchanger 2. The second flow regulating valve 15 is installed on the pipeline between the output end of the cooling oil drive pump 13 and one end of the second heat exchanger 3. The temperature sensor is fixed at the oil inlet of the hydraulic cylinder and is configured to collect the temperature of the oil inlet of the hydraulic cylinder. The controller is electrically connected to the first flow regulating valve 14, the second flow regulating valve 15, the temperature sensor, and the cooling oil drive pump 13.

[0025] The controller can be a microcontroller or a PLC.

[0026] Preferably, the hydraulic cylinders of the coke quenching car include: a furnace door driving hydraulic cylinder 4 and a coke guide grid driving hydraulic cylinder 5. A second heat exchanger 3 is fixedly installed in the oil pipe connected to the oil inlet of the furnace door driving hydraulic cylinder 4 and in the oil pipe connected to the oil inlet of the coke guide grid driving hydraulic cylinder 5, respectively. The second heat exchanger 3 is a straight pipe, and hemispheres are fixed at both ends of the second heat exchanger 3, the hemispheres sealing the openings at both ends of the second heat exchanger 3. The diameter of the second heat exchanger 3 is half the inner diameter of the oil pipe. The two ends of the sidewall of the second heat exchanger 3 are connected to the output end of the cooling oil driving pump 13 and the cooling oil tank 12 respectively through pipe fittings passing through the oil pipe.

[0027] The length of the second heat exchanger 3 is between 10cm and 30cm, and the diameter of the oil pipe for installing the second heat exchanger 3 is correspondingly enlarged to ensure the normal operation of the hydraulic oil.

[0028] Preferably, the refrigeration unit 1 further includes a support ring 16, which includes two annular parts and a fixing block. The two annular parts are coaxially fitted together, and the outer side wall of one annular part is fixedly connected to the inner wall of the oil pipe. The inner side wall of the other annular part is fixedly connected to the side wall of the second heat exchanger 3. At least two fixing blocks are fixed between the two annular parts.

[0029] Preferably, the cross-sectional area of ​​the oil passage between the two annular parts and the fixing block of the support ring 16 is greater than or equal to the oil inlet area of ​​the furnace door driving hydraulic cylinder 4 or the oil inlet area of ​​the coke guide grid driving hydraulic cylinder 5.

[0030] The specific operation process of this utility model is as follows:

[0031] The hydraulic system of this utility model includes: a hydraulic oil drive pump 6, a hydraulic cylinder, an oil reservoir 7, a first heat exchanger 2, and a second heat exchanger 3. The hydraulic oil drive pump 6, the hydraulic cylinder, the oil reservoir 7, and the first heat exchanger 3 are sequentially connected to form a closed-loop oil circuit, and the first heat exchanger 2 and the second heat exchanger 3 are arranged in parallel.

[0032] The refrigeration mechanism 11 of this utility model further includes: a compressor 111, a condenser 112 and an expansion valve 113, wherein the compressor 111, the condenser 112, the expansion valve 113 and the evaporator 114 are connected in sequence to form the refrigeration mechanism 11.

[0033] When this invention is in operation, the temperature sensor detects the temperature of the oil inlet of the hydraulic cylinder. The temperature of the hydraulic oil entering the hydraulic cylinder can be calculated based on the temperature of the oil inlet of the hydraulic cylinder. Due to different ambient temperatures, it is necessary to conduct multiple tests to obtain the correspondence between the oil inlet temperature of the hydraulic cylinder and the temperature of the hydraulic oil entering the hydraulic cylinder.

[0034] When the coke quenching car is working, the cooling system of this utility model can be put into operation. At this time, the first flow regulating valve 14 is fully open, the second flow regulating valve 15 is fully closed, the refrigeration mechanism 11 is running, and a cold source is provided to the cooling oil tank 12. The cooled cold source is injected into the first heat exchanger 2 to cool down the hydraulic oil and keep the temperature of the hydraulic oil at 30℃~60℃ when it enters the oil storage tank 7.

[0035] When the temperature of the hydraulic oil in the hydraulic cylinder is calculated to be higher than 60°C based on the inlet temperature of the hydraulic cylinder, the controller controls the flow rate of cooling oil into the second heat exchanger 3 by controlling the second flow regulating valve 15. Correspondingly, the first flow regulating valve 14 reduces the flow rate of cooling oil to ensure that the temperature of the hydraulic oil entering the hydraulic cylinder is between 30°C and 60°C.

[0036] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0037] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A hydraulic oil cooling system for a coke pushing car, characterized by, include: A refrigeration unit, which is fixed on the coke quenching car; The first heat exchanger has a hot fluid inlet connected to the oil outlet of the hydraulic cylinder of the coke quenching car, a hot fluid outlet connected to the hydraulic oil tank of the coke quenching car, a cold fluid inlet connected to the output end of the refrigeration unit, and a cold fluid outlet connected to the input end of the refrigeration unit. The second heat exchanger is a copper tube fitting. The second heat exchanger is installed in the oil pipe near the oil inlet of the hydraulic cylinder, and one end of the second heat exchanger is connected to the output end of the refrigeration unit, while the other end of the second heat exchanger is connected to the input end of the refrigeration unit.

2. The hydraulic oil cooling system for the coke quenching car according to claim 1, characterized in that, The refrigeration unit includes: A refrigeration mechanism, comprising an evaporator; A cooling oil tank is provided, which is filled with cooling oil. The evaporator is disposed in the cooling oil tank. The cold fluid outlet of the first heat exchanger is connected to the cooling oil tank. A cooling oil drive pump is provided, with its input end connected to the cooling oil tank and its output end connected to the cold fluid inlet of the first heat exchanger. One end of the second heat exchanger is connected to the output end of the cooling oil drive pump, and the other end of the second heat exchanger is connected to the cooling oil tank.

3. The pusher hydraulic oil cooling system of claim 2, wherein, The refrigeration unit includes: A first flow regulating valve is provided on the pipeline between the output end of the cooling oil drive pump and the cold fluid inlet of the first heat exchanger. A second flow regulating valve is provided on the pipeline between the output end of the cooling oil drive pump and one end of the second heat exchanger. A temperature sensor is fixed at the oil inlet of the hydraulic cylinder and is configured to collect the temperature at the oil inlet of the hydraulic cylinder. The controller is electrically connected to the first flow regulating valve, the second flow regulating valve, the temperature sensor, and the cooling oil drive pump.

4. The pusher hydraulic oil cooling system of claim 3, wherein, The hydraulic cylinders of the coke quenching car include: a furnace door driving hydraulic cylinder and a coke guide grid driving hydraulic cylinder; A second heat exchanger is fixed in the oil pipe connected to the oil inlet of the furnace door driving hydraulic cylinder and in the oil pipe connected to the oil inlet of the coke guide grid driving hydraulic cylinder. The second heat exchanger is a straight tube. Hemispheres are fixed at both ends of the second heat exchanger, and the hemispheres seal the openings at both ends of the second heat exchanger. The diameter of the second heat exchanger is half the inner diameter of the oil pipe. The two ends of the side wall of the second heat exchanger are connected to the output end of the cooling oil drive pump and the cooling oil tank through the oil pipe via fittings.

5. The pusher hydraulic oil cooling system of claim 4, wherein, The refrigeration unit also includes a support ring, which includes two annular components and a fixing block. The two annular components are coaxially fitted together, and the outer wall of one annular component is fixedly connected to the inner wall of the oil pipe. The inner wall of the other annular component is fixedly connected to the side wall of the second heat exchanger. At least two fixing blocks are fixed between the two annular components.

6. The pusher hydraulic oil cooling system of claim 5, wherein, The oil passing cross-sectional area between the two annular members and the fixing block of the support ring is greater than or equal to the oil inlet passing area of the furnace door driving hydraulic cylinder or the oil inlet passing area of the coke guide grid driving hydraulic cylinder.

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