Urea filling equipment with heat preservation

Abstract

The present invention relates to the technical field of urea filling equipment, and discloses a urea filling equipment with insulation, including a cabinet, a urea filling machine host and a control system arranged in the cabinet, and a urea filling plug-in connected to the host through a hose, a hydraulic chamber for installing the urea filling machine host is arranged in the cabinet, and a warming box for keeping the urea filling plug-in warm is arranged on the outside of the cabinet, a first heating module and a first temperature sensor are arranged in the hydraulic chamber, a second heating module and a second temperature sensor are arranged in the warming box, and the first heating module, the first temperature sensor, the second heating module, and the second temperature sensor are connected to the control system respectively. The present invention solves the problem of urea filling equipment failure and easy damage to equipment pipelines caused by too low temperature in winter or cold areas.

Description

Technical Field

[0001] The invention relates to the technical field of urea filling equipment, and in particular to urea filling equipment with heat insulation. Background Art

[0002] Urea filling equipment is mainly used for filling urea liquid into diesel vehicles to achieve vehicle exhaust emission purification to meet the exhaust emission requirements of diesel vehicles of National IV and above.

[0003] The urea filling equipment in the prior art has the following problems when in use:

[0004] First, when used in winter or cold areas, the urea liquid will crystallize and become a solid-liquid mixture when the temperature is below -11°C, thus affecting the filling and metering of the urea filling equipment.

[0005] Second, the volume of the urea solution will expand after it freezes and solidifies. After it is completely solidified, the volume expands by about 7%, which may damage the internal pipelines of the urea filling equipment. Summary of the invention

[0006] In order to solve the above problems, the present invention proposes a urea filling device with heat preservation, aiming to solve the problem of urea filling equipment failure and equipment pipeline being easily damaged due to low temperature in winter or cold areas. The specific technical solution is as follows:

[0007] A urea filling device with insulation comprises a cabinet, a urea filling machine host and a control system arranged in the cabinet, and a urea filling plug-in connected to the host through a hose, wherein a hydraulic chamber for installing the urea filling machine host is arranged in the cabinet, and a insulation box for insulating the urea filling plug-in is arranged on the outside of the cabinet, a first heating module and a first temperature sensor are arranged in the hydraulic chamber, a second heating module and a second temperature sensor are arranged in the insulation box, and the first heating module, the first temperature sensor, the second heating module, and the second temperature sensor are respectively connected to the control system.

[0008] In the above technical scheme, by arranging a first heating module in the hydraulic chamber where the urea filling machine main unit is installed and arranging a warming box with a built-in second heating module on the outside of the cabinet of the urea filling equipment, the disadvantage of easy freezing of urea in the main unit of the traditional filling machine and in the pipelines of the urea filling external parts is solved, and the damage of the pipelines in the main unit of the filling machine due to the expansion of urea crystals can be effectively prevented, thereby improving the ability of the urea filling equipment to adapt to low temperature environment and the working reliability.

[0009] Preferably, a layer of flame-retardant polyurethane insulation board is provided on the inner wall of the sheet metal shell of the hydraulic chamber in the urea filling equipment with insulation of the present invention.

[0010] Preferably, a layer of flame-retardant polyurethane insulation board is provided on the inner wall of the sheet metal shell of the thermal insulation box.

[0011] Preferably, the flame-retardant polyurethane insulation panels are respectively fixed to the inner wall of the sheet metal shell by self-spraying adhesive.

[0012] As a further improvement of the present invention, the urea filling machine main unit includes a urea filling pump, a urea filter, a urea solenoid valve and a urea flowmeter which are connected in sequence through an antifreeze pipeline. The antifreeze pipeline is a double-tube structure with an inner and outer layer of tube bodies. The outer layer of the double-tube structure is a rigid thick-walled tube body, and the inner layer of the double-tube structure is an elastic thin-walled tube body, and an annular sealed cavity is formed between the rigid thick-walled tube body and the elastic thin-walled tube body.

[0013] The pipeline of the main engine of the above-mentioned urea filling machine is an antifreeze pipeline with a double-tube structure. It utilizes the easy deformation property of the elastic thin-walled tube of the inner tube body, which can adapt to the deformation caused by the expansion of urea crystals. Even in the case of a heating module failure or the urea filling equipment shutdown, it can ensure that the pipeline will not rupture after the urea crystals expand, thereby further improving the antifreeze ability of the urea filling equipment.

[0014] Preferably, a sensor mounting hole is opened in the middle of the rigid thick-walled tube body, an ultrasonic ranging sensor connected to the control system is arranged in the sensor mounting hole, and the measuring head of the ultrasonic ranging sensor is aligned with the outer circular surface of the elastic thin-walled tube body.

[0015] Preferably, a low-temperature heating belt is axially arranged in the annular sealing cavity, and the low-temperature heating belt is connected to the control system.

[0016] The above-mentioned arrangement of the ultrasonic ranging sensor and the low-temperature heating belt on the antifreeze pipeline enables the control system of the equipment to timely detect the early situation of urea crystallization and expansion and issue early warning information. When necessary, the low-temperature heating belt installed in the antifreeze pipeline can also be turned on for heating to replace the heating module in the hydraulic chamber that may fail, thereby further improving the safety and reliability of the equipment.

[0017] Considering that fluctuations may occur in the pipeline during the urea filling process, the urea filling equipment with insulation of the present invention can eliminate the pressure fluctuation factor by obtaining the use status of the equipment through the control system, thereby preventing the misjudgment of pipeline freezing.

[0018] In the present invention, the low-temperature heating belt in the antifreeze pipeline has a self-limiting temperature function, will not cause overheating, and has good reliability.

[0019] The beneficial effects of the present invention are:

[0020] First, a urea filling device with heat preservation of the present invention solves the drawback that urea is easy to freeze in the main body of the traditional filling machine and in the pipeline of the urea filling external component by arranging a first heating module in the hydraulic chamber where the main body of the urea filling machine is installed and arranging a warming box with a second heating module built in on the outside of the cabinet of the urea filling device, and can effectively prevent the damage of the pipeline in the main body of the filling machine caused by the expansion of urea crystals, thereby improving the ability of the urea filling device to adapt to work in a low-temperature environment and the working reliability.

[0021] Secondly, in the urea filling equipment with heat preservation of the present invention, the pipeline of the main engine of the urea filling machine is an antifreeze pipeline with a double-tube structure, which utilizes the easy deformation property of the elastic thin-walled tube of the inner tube body, and can adapt to the deformation caused by the expansion of urea crystals. Even in the case of a heating module failure or the urea filling equipment shutdown, it can ensure that the pipeline will not rupture after the urea crystals expand, thereby further improving the antifreeze ability of the urea filling equipment.

[0022] Thirdly, the urea filling equipment with insulation of the present invention is provided with an ultrasonic distance measuring sensor and a low-temperature heating belt on the antifreeze pipeline, so that the control system of the equipment can timely detect the early situation of urea crystallization and expansion and issue early warning information, and when necessary, the low-temperature heating belt arranged in the antifreeze pipeline can be turned on for heating to replace the heating module in the hydraulic chamber which may fail, thereby further improving the safety and reliability of the equipment.

[0023] Fourthly, in the urea filling equipment with heat preservation of the present invention, the low-temperature heating belt in the antifreeze pipeline has the function of self-limiting temperature, will not cause overheating, and has good reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a urea filling device with heat preservation according to the present invention;

[0025] Figure 2 It is a structural diagram of the antifreeze pipeline.

[0026] In the figure: 1. cabinet, 2. urea filling machine main unit, 3. control system, 4. urea filling plug-in, 5. hydraulic chamber, 6. warming box, 7. first heating module, 8. first temperature sensor, 9. second heating module, 10. second temperature sensor, 11. flame retardant polyurethane insulation board, 12. antifreeze pipeline, 13. outer pipe body, 14. inner pipe body, 15. annular sealing cavity, 16. ultrasonic ranging sensor, 17. low-temperature heating belt, 18. connecting flange. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0028] like Figures 1 to 2 The figure shows an embodiment of a urea filling device with insulation of the present invention, comprising a cabinet 1, a urea filling machine host 2 and a control system 3 arranged in the cabinet 1, and a urea filling plug-in 4 connected to the host 2 through a hose, a hydraulic chamber 5 for installing the urea filling machine host 2 is arranged in the cabinet 1, and a thermal insulation box 6 for thermal insulation of the urea filling plug-in 4 is arranged on the outside of the cabinet 1, a first heating module 7 and a first temperature sensor 8 are arranged in the hydraulic chamber 5, a second heating module 9 and a second temperature sensor 10 are arranged in the thermal insulation box 6, and the first heating module 7, the first temperature sensor 8, the second heating module 9, and the second temperature sensor 10 are respectively connected to the control system 3.

[0029] In the above technical scheme, by arranging a first heating module 7 in the hydraulic chamber 5 where the urea filling machine main unit 2 is installed and arranging a warming box 6 with a built-in second heating module 9 on the outside of the cabinet 1 of the urea filling equipment, the disadvantage of easy freezing of urea in the pipelines of the traditional filling machine main unit 2 and the urea filling external component 4 is solved, and the damage of the pipelines in the filling machine main unit 2 caused by the expansion of urea crystals can be effectively prevented, thereby improving the ability of the urea filling equipment to adapt to low temperature environment and the working reliability.

[0030] Preferably, a layer of flame-retardant polyurethane insulation board is provided on the inner wall of the sheet metal shell of the hydraulic chamber 5 in the urea filling equipment with insulation of the present invention.

[0031] Preferably, a layer of flame-retardant polyurethane insulation board 11 is provided on the inner wall of the sheet metal shell of the insulation box 6 .

[0032] Preferably, the flame-retardant polyurethane insulation board 11 is fixed to the inner wall of the sheet metal shell by self-spraying adhesive.

[0033] As a further improvement of the present invention, the urea filling machine main unit 2 includes a urea filling pump, a urea filter, a urea solenoid valve and a urea flowmeter which are connected in sequence through an antifreeze pipeline 12. The antifreeze pipeline 12 is a double-tube structure with an inner and outer layer of tube bodies. The outer layer of the double-tube structure 13 is a rigid thick-walled tube body, and the inner layer of the double-tube structure 14 is an elastic thin-walled tube body, and an annular sealing cavity 15 is formed between the rigid thick-walled tube body and the elastic thin-walled tube body.

[0034] The pipeline of the above-mentioned urea filling machine main unit 2 is an antifreeze pipeline 12 with a double-tube structure, which utilizes the elastic thin-walled tube body of the inner tube body and is easy to deform. It can adapt to the deformation caused by the expansion of urea crystals. Even in the case of a heating module failure or the urea filling equipment shutdown, it can ensure that the pipeline will not rupture after the urea crystals expand, thereby further improving the antifreeze ability of the urea filling equipment.

[0035] Preferably, a sensor mounting hole is opened in the middle of the rigid thick-walled tube body, an ultrasonic ranging sensor 16 connected to the control system 3 is arranged in the sensor mounting hole, and the measuring head of the ultrasonic ranging sensor 16 is aligned with the outer circular surface of the elastic thin-walled tube body.

[0036] Preferably, a low-temperature heating belt 17 is axially arranged in the annular sealed cavity 15 , and the low-temperature heating belt 17 is connected to the control system 3 .

[0037] The above-mentioned arrangement of the ultrasonic distance measuring sensor 16 and the low-temperature heating belt 17 on the antifreeze pipeline 12 enables the control system 3 of the equipment to detect the early situation of urea crystallization and expansion in time and issue early warning information. When necessary, the low-temperature heating belt 17 arranged in the antifreeze pipeline 12 can also be turned on for heating to replace the heating module 7 in the hydraulic chamber 5 that may fail, thereby further improving the safety and reliability of the equipment.

[0038] Considering that fluctuations may occur in the pipeline during the urea filling process, the urea filling equipment with insulation of the present invention can eliminate the pressure fluctuation factor by obtaining the use status of the equipment through the control system, thereby preventing the misjudgment of pipeline freezing.

[0039] In this embodiment, the low-temperature heating belt 17 in the antifreeze pipeline 12 has a self-limiting temperature function and will not cause overheating, and has good reliability.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A urea filling device that does not break the pipeline even if a heating module fails and causes urea crystal expansion, characterized in that: The invention comprises a cabinet, a hydraulic chamber arranged at the lower part of the cabinet, a control system arranged at the upper part of the cabinet, and a warming box arranged adjacent to the hydraulic chamber at the lower part of the cabinet, wherein a urea filling machine host, a first heating module and a first temperature sensor are respectively arranged in the hydraulic chamber, and a urea filling plug-in, a second heating module and a second temperature sensor connected to the host through a hose are respectively arranged in the warming box, and the first heating module, the first temperature sensor, the second heating module and the second temperature sensor are respectively connected to the control system; the urea filling machine host comprises urea filling modules connected in sequence through antifreeze pipelines, a first heating module and a second temperature sensor; The invention relates to a urea filling pump, a urea filter, a urea solenoid valve and a urea flowmeter. The antifreeze pipeline is a double-tube structure with an inner and outer tube body. The outer tube body in the double-tube structure is a rigid thick-walled tube body, and the inner tube body in the double-tube structure is an elastic thin-walled tube body. An annular sealed cavity is formed between the rigid thick-walled tube body and the elastic thin-walled tube body. A sensor mounting hole is opened in the middle of the rigid thick-walled tube body. An ultrasonic ranging sensor connected to the control system is arranged in the sensor mounting hole. The measuring head of the ultrasonic ranging sensor is aligned with the outer circular surface of the elastic thin-walled tube body.

2. A urea filling device according to claim 1, wherein the pipeline will not rupture even if a heating module failure causes urea crystal expansion, characterized in that: A layer of flame-retardant polyurethane insulation board is arranged on the inner wall of the sheet metal shell of the hydraulic chamber.

3. The urea filling equipment according to claim 2, wherein the pipeline will not break even if the heating module fails and causes urea crystal expansion, characterized in that: A layer of flame-retardant polyurethane insulation board is arranged on the inner wall of the sheet metal shell of the insulation box.

4. The urea filling equipment according to claim 3, wherein the pipeline will not rupture even if the heating module fails and causes urea crystal expansion, wherein: The flame-retardant polyurethane heat-insulating panels are respectively fixed on the inner wall of the sheet metal shell by self-spraying adhesive.

5. The urea filling equipment according to claim 1, wherein the pipeline will not break even if the urea crystals expand due to a heating module failure, characterized in that: Both ends of the inner tube body are provided with flanges connected to the inner holes at both ends of the outer tube body, so as to form the annular sealing cavity between the outer tube body and the inner tube body.

6. According to claim 5, a urea filling device in which the pipeline will not rupture even if a heating module failure causes urea crystal expansion, a low-temperature heating belt is axially arranged in the annular sealing cavity, and the low-temperature heating belt is connected to the control system.

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