Sanitation vehicle warm-up preheating system

Abstract

The application discloses a sanitation vehicle warm-up preheating system and belongs to the technical field of sanitation vehicles. The sanitation vehicle warm-up preheating system comprises a hydraulic oil tank, a hydraulic pump, a main valve, a hydraulic actuator, a radiator, a controller, a temperature sensor and an electromagnetic reversing valve. The hydraulic oil tank, the hydraulic pump, the main valve, the hydraulic actuator, the radiator and the electromagnetic reversing valve are connected through hydraulic pipelines. The main valve, the radiator, the controller, the temperature sensor and the electromagnetic reversing valve are controlled through an electrical harness. The sanitation vehicle warm-up preheating system can realize the following functions: when the sanitation vehicle is started in a cold region in northern China in winter, the energy lost by a fixed throttle hole is used to rapidly heat the hydraulic oil through a small circulation, the hydraulic oil is forcibly preheated, the oil temperature of the hydraulic oil reaches an optimal working oil temperature range, and the protection of the hydraulic components is improved.

Description

Technical Field

[0001] This invention relates to the field of sanitation vehicle technology, and in particular to a sanitation vehicle warm-up and preheating system. Background Technology

[0002] Engineering vehicles typically transmit power through a hydraulic system, which generally includes a hydraulic oil tank, pump, pipelines, and valves, and is filled with hydraulic oil. In cold winter regions of northern China, the viscosity of the hydraulic oil increases at low temperatures, making it difficult for the pump to draw oil and affecting the normal operation of the hydraulic actuators. When a sanitation vehicle is started, the operator needs to manually pressurize it. The energy generated by the overflow loss heats the hydraulic oil, allowing it to quickly reach and maintain its operating temperature within a certain range, thus enabling the sanitation vehicle to operate.

[0003] Existing hydraulic oil preheating technology requires highly skilled operators. Due to varying operator skill levels, the hydraulic oil temperature may not reach the optimal operating temperature before operation begins. Some operators even start operation without preheating. Prolonged improper operation can affect the performance of hydraulic components, reduce their reliability, and shorten the service life of sanitation vehicles. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and to propose a preheating system for sanitation vehicles.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A preheating system for a sanitation vehicle includes: a hydraulic oil tank, a hydraulic pump, a main valve, a hydraulic actuator, a radiator, a controller, a temperature sensor, and a solenoid directional valve;

[0007] The hydraulic oil tank, hydraulic pump, main valve, hydraulic actuator, radiator, and solenoid directional valve are connected by hydraulic pipelines.

[0008] The main valve, radiator, controller, temperature sensor, and solenoid directional valve are controlled by electrical wiring harnesses.

[0009] Preferably, the electromagnetic reversing valve is provided with a fixed throttling orifice and the reversing is controlled by an electromagnet.

[0010] Preferably, it also includes an engine, the engine is externally connected to an exhaust pipe, the exhaust pipe is connected to a first air pipe and a second air pipe, the end of the second air pipe away from the exhaust pipe passes through a hydraulic oil tank and is connected to the first air pipe, and a one-way valve is provided inside the second air pipe.

[0011] Preferably, a partition is rotatably arranged inside the hydraulic oil tank, which divides the hydraulic oil tank into a driving chamber and an oil storage chamber. A mixing component is arranged in the oil storage chamber, and a driving component for driving the mixing component is arranged in the driving chamber. The second air pipe includes a first heat-insulating pipe connected to the exhaust pipe, a second heat-insulating pipe connected to the first air pipe, and a heat-conducting pipe disposed between the first heat-insulating pipe and the second heat-insulating pipe. The heat-conducting pipe is placed inside the oil storage chamber.

[0012] Preferably, the drive assembly includes a drive rod rotatably connected to the hydraulic oil tank, a drive gear is provided on the drive rod, a driven gear is meshed with the outer side of the drive gear, a rotating tube is connected to the driven gear and rotatably connected to the hydraulic oil tank, and the rotating tube is sleeved on the outer side of the first insulation tube.

[0013] Preferably, the end of the drive rod away from the hydraulic oil tank passes through the exhaust pipe and extends into it, and the drive rod is provided with a toggle plate on the rod body inside the exhaust pipe, and a guide block for guiding the airflow is provided inside the exhaust pipe.

[0014] Preferably, the mixing assembly includes a connecting plate connected to the rotating tube, a rotating rod rotatably connected to the connecting plate, the rotating rod being fixedly connected to a partition, and a plurality of equally spaced stirring blades being provided on the rotating rod.

[0015] Preferably, a first sealing ring is provided between the first insulation pipe and the partition, and a second sealing ring is provided between the second insulation pipe and the hydraulic oil tank.

[0016] Preferably, the stirring blade includes a stirring frame connected to a rotating rod, a rotating shaft is rotatably connected inside the stirring frame, a stirring plate is provided on the rotating shaft, a driven bevel gear is provided on the rotating shaft, a gear ring that meshes with the driven bevel gear is fixed on the inner wall of the oil storage cavity, a protective ring is rotatably connected to the outer side of the gear ring on the inner wall of the oil storage cavity, and the protective ring is rotatably arranged with the rotating shaft.

[0017] Preferably, a working shell is fixedly provided on the inner wall of the oil storage cavity, a piston plate is slidably connected inside the working shell, a volatile liquid is filled between the piston plate and the inner wall of the working shell, an elastic element is provided between the piston plate and the inner wall of the working shell, a heat insulation plate is provided on the side of the piston plate away from the elastic element, a recess is opened between the first heat insulation pipe and the heat conducting pipe, a flexible sealing sheet is connected to the recess, and the heat insulation plate and the flexible sealing sheet are movably abutted against and movably connected in the recess.

[0018] Compared with the prior art, the present invention provides a preheating system for sanitation vehicles, which has the following beneficial effects:

[0019] 1. The sanitation vehicle's warm-up and preheating system collects input signals from temperature sensors through a controller. After processing by the controller, the system controls the main valve, solenoid directional valve, and radiator. When the hydraulic oil temperature detected by the temperature sensor is too low, the controller sends a control signal to the solenoid directional valve, causing it to operate in its upper position. At this time, the hydraulic oil in the main oil circuit flows through the hydraulic oil tank, hydraulic pump, main valve, and solenoid directional valve, and then back to the hydraulic oil tank. During the circulation process, the fixed throttling orifice set in the upper position of the solenoid directional valve is used to forcibly preheat the hydraulic oil, overcome local pressure loss, and allow the hydraulic oil temperature to quickly reach the optimal working temperature range, enabling the sanitation vehicle to quickly enter its optimal working state.

[0020] 2. The preheating system of this sanitation vehicle uses the exhaust gas from the engine to preheat the hydraulic oil in the hydraulic oil tank. The control drive component drives the mixing component to stir the hydraulic oil in the hydraulic oil tank, so that the hydraulic oil in the hydraulic oil tank and the heat conduction pipe are heated evenly. This ensures that the temperature of the hydraulic oil in all parts of the tank is uniform, improves the preheating efficiency of the hydraulic oil, and thus ensures the accuracy of the temperature sensor detection and the normal use of the hydraulic oil.

[0021] 3. The sanitation vehicle's warm-up and preheating system uses a working housing inside the hydraulic oil tank, filled with volatile liquids such as ethanol and acetone. Liquids with different evaporation temperatures are selected based on the optimal operating temperature of the hydraulic oil in the sanitation vehicle's hydraulic actuator. When the hydraulic oil temperature in the reservoir reaches the optimal operating temperature, the volatile liquid in the working housing evaporates and exerts force on the piston plate, causing the piston plate to move the heat insulation plate downwards. The heat insulation plate then presses against the flexible sealing sheet, moving the heat insulation plate into the recessed hole to seal the first air pipe. This prevents the exhaust gas from the engine from heating the hydraulic oil in the reservoir, avoiding excessively high hydraulic oil temperatures that could cause deterioration and ensuring the hydraulic oil can be used normally. Attached Figure Description

[0022] Figure 1 This is a block diagram illustrating the working principle of the present invention;

[0023] Figure 2 This is a schematic diagram of the external structure of the hydraulic oil tank of the present invention;

[0024] Figure 3 This is a cross-sectional structural diagram of the hydraulic oil tank of the present invention;

[0025] Figure 4 For the present invention Figure 3 A partially enlarged structural diagram of section A in the middle;

[0026] Figure 5 This is a schematic diagram of the structure of the hybrid component of the present invention;

[0027] Figure 6This is a schematic diagram of the structure of the stirring plate of the present invention;

[0028] Figure 7 This is a partial cross-sectional structural diagram of the exhaust pipe of the present invention.

[0029] In the diagram: 1. Hydraulic oil tank; 2. Hydraulic pump; 3. Main valve; 4. Hydraulic actuator; 5. Radiator; 6. Controller; 7. Temperature sensor; 8. Solenoid directional valve; 9. Engine; 901. Exhaust pipe; 9011. Guide block; 902. First air pipe; 903. Second air pipe; 9031. First insulation pipe; 9032. Second insulation pipe; 9033. Heat conduction pipe; 10. Baffle plate; 11. Mixing assembly; 111. Connecting plate; 112. Rotating rod; 12. Drive assembly ; 121, Drive rod; 1211, Actuating plate; 122, Drive gear; 123, Driven gear; 124, Rotating tube; 13, Stirring plate; 131, Stirring frame; 132, Rotating shaft; 133, Stirring plate; 134, Driven bevel gear; 14, First sealing ring; 141, Second sealing ring; 15, Gear ring; 16, Protective ring; 17, Working housing; 171, Piston plate; 172, Elastic element; 173, Heat insulation plate; 18, Concave hole; 181, Flexible sealing plate. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Example:

[0034] Reference Figure 1 A preheating system for a sanitation vehicle includes: a hydraulic oil tank 1, a hydraulic pump 2, a main valve 3, a hydraulic actuator 4, a radiator 5, a controller 6, a temperature sensor 7, and a solenoid directional valve 8.

[0035] The hydraulic oil tank 1, hydraulic pump 2, main valve 3, hydraulic actuator 4, radiator 5 and solenoid directional valve 8 are connected by hydraulic pipelines.

[0036] The main valve 3, radiator 5, controller 6, temperature sensor 7, and solenoid directional valve 8 are controlled by electrical wiring harnesses.

[0037] Furthermore, the electromagnetic reversing valve 8 is equipped with a fixed throttling orifice and is controlled by an electromagnet for reversing.

[0038] Specifically, the controller 6 collects the input signal from the temperature sensor 7, and after processing by the controller 6, controls the main valve 3, the solenoid directional valve 8, and the radiator 5. When the hydraulic oil temperature collected by the temperature sensor 7 is too low, the controller 6 sends a control signal to the solenoid directional valve 8, causing the solenoid directional valve 8 to work in its upper position. At this time, the hydraulic oil in the main oil circuit flows back to the hydraulic oil tank 1 through the hydraulic oil tank 1, the hydraulic pump 2, the main valve 3, and the solenoid directional valve 8. During the circulation process, the fixed throttling orifice set in the upper position of the solenoid directional valve 8 is used to forcibly preheat the hydraulic oil, overcome local pressure loss, and make the hydraulic oil temperature quickly reach the optimal working oil temperature range, thereby improving the protection of hydraulic components and enabling the sanitation vehicle to quickly enter the optimal working state in the cold winter of northern regions.

[0039] Reference Figure 2 and Figure 3 As a preferred technical solution of the present invention, it also includes an engine 9, an exhaust pipe 901 connected to the engine 9, a first air pipe 902 and a second air pipe 903 connected to the exhaust pipe 901, the end of the second air pipe 903 away from the exhaust pipe 901 passes through the hydraulic oil tank 1 and is connected to the first air pipe 902, and a one-way valve is provided in the second air pipe 903.

[0040] Furthermore, a partition 10 is rotatably installed inside the hydraulic oil tank 1, which divides the hydraulic oil tank 1 into a drive chamber and an oil storage chamber. A mixing component 11 is installed in the oil storage chamber, and a drive component 12 for driving the mixing component 11 is installed in the drive chamber. The second air pipe 903 includes a first heat-insulating pipe 9031 connected to the exhaust pipe 901, a second heat-insulating pipe 9032 connected to the first air pipe 902, and a heat-conducting pipe 9033 disposed between the first heat-insulating pipe 9031 and the second heat-insulating pipe 9032. The heat-conducting pipe 9033 is placed inside the oil storage chamber.

[0041] Specifically, when the sanitation vehicle starts, the engine 9 runs, and the exhaust pipe 901 can discharge the high-temperature exhaust gas generated during operation. The end of the exhaust pipe 901 away from the engine 9 is provided with a first air pipe 902 and a second air pipe 903. The two air pipes split the exhaust gas in the exhaust pipe 901. Part of the exhaust gas is directly discharged into the atmosphere through the first air pipe 902, and the other part of the exhaust gas enters the second air pipe 903 and preheats the hydraulic oil in the oil storage chamber. During this process, the drive component 12 is activated and drives the mixing component 11 to work, so that the hydraulic oil in the oil storage chamber is heated evenly. After exchanging heat with the hydraulic oil in the hydraulic oil tank 1, the exhaust gas enters the first air pipe 902 and continues to be discharged into the atmosphere. When the hydraulic oil in the hydraulic oil tank 1 reaches the working temperature, the second air pipe 903 no longer supplies exhaust gas, so that all the exhaust gas generated by the engine 9 is discharged through the first air pipe 902.

[0042] Reference Figure 2 , Figure 3 , Figure 4 and Figure 7 As a preferred technical solution of the present invention, the drive assembly 12 includes a drive rod 121 rotatably connected to the hydraulic oil tank 1, a drive gear 122 is provided on the drive rod 121, a driven gear 123 is meshed with the outside of the drive gear 122, a rotating tube 124 is connected to the driven gear 123 and rotatably connected to the hydraulic oil tank 1, and the rotating tube 124 is sleeved on the outside of the first heat preservation tube 9031.

[0043] Furthermore, the end of the drive rod 121 away from the hydraulic oil tank 1 passes through the exhaust pipe 901 and extends into it. The drive rod 121 is equipped with a toggle piece 1211 on the rod body inside the exhaust pipe 901. A guide block 9011 for guiding airflow is provided inside the exhaust pipe 901.

[0044] Specifically, the exhaust gas generated by engine 9 is transported in exhaust pipe 901. Through the guiding effect of guide block 9011, the flowing exhaust gas pushes the toggle plate 1211, causing the toggle plate 1211 to drive the drive rod 121 to rotate. When the drive rod 121 rotates, the outer drive gear 122 meshes with the driven gear 123 on the rotating tube 124, causing the driven gear 123 to drive the rotating tube 124 to rotate outside the first heat preservation tube 9031, and the drive assembly 12 works automatically.

[0045] Reference Figure 3 , Figure 4 and Figure 5 As a preferred technical solution of the present invention, the mixing component 11 includes a connecting plate 111 connected to the rotating tube 124, a rotating rod 112 rotatably connected to the connecting plate 111, the rotating rod 112 being fixedly connected to the partition plate 10, and a plurality of equidistantly distributed stirring blades 13 being provided on the rotating rod 112; specifically, when the driving component 12 is working, the rotating tube 124 drives the rotating rod 112 to rotate through the connecting plate 111, so that the rotating rod 112 drives the stirring blades 13 to stir the hydraulic oil in the oil storage chamber, thereby making the hydraulic oil in the oil storage chamber uniformly heated, so that the temperature of each part of the hydraulic oil in the hydraulic oil tank 1 can be uniform, improving the preheating efficiency of the hydraulic oil, ensuring the accuracy of the temperature sensor 7 in detecting the temperature, and at the same time as the rotating rod 112 rotates, it drives the partition plate 10 to rotate in the hydraulic oil tank 1, so as to avoid the partition plate 10 affecting the movement of the rotating rod 112.

[0046] Reference Figure 3 and Figure 4 As a preferred technical solution of the present invention, a first sealing ring 14 is provided between the first insulation pipe 9031 and the partition plate 10, and a second sealing ring 141 is provided between the second insulation pipe 9032 and the hydraulic oil tank 1; specifically, by providing a sealing ring between the hydraulic oil tank 1 and the second air pipe 903, the sealing performance of the hydraulic oil tank 1 can be improved.

[0047] Reference Figure 4 , Figure 5 and Figure 6 As a preferred embodiment of the present invention, the stirring plate 13 includes a stirring frame 131 connected to the rotating rod 112. A rotating shaft 132 is rotatably connected inside the stirring frame 131. A stirring plate 133 is provided on the rotating shaft 132. A driven bevel gear 134 is provided on the rotating shaft 132. A gear ring 15 that meshes with the driven bevel gear 134 is fixedly provided on the inner wall of the oil storage chamber. A protective ring 16 is rotatably connected to the inner wall of the oil storage chamber outside the gear ring 15. The protective ring 16 is rotatably disposed with the rotating shaft 132. The provision of the protective ring 16 can ensure the normal meshing and transmission between the driven bevel gear 134 and the gear ring 15. The rotating rod 112 rotates with the rotation. When the tube 124 rotates, the stirring frame 131 on the rotating rod 112 rotates synchronously. The stirring frame 131 drives the rotating shaft 132 to move. When the rotating shaft 132 moves, the driven bevel gear 134 at the end meshes with the gear ring 15 to drive the rotation. This allows the rotating shaft 132 to rotate as it moves with the stirring plate 13. The rotating shaft 132 drives the stirring plate 133 to rotate inside the stirring frame 131, thereby achieving radial stirring of the hydraulic oil in the oil storage chamber. This further ensures that the hydraulic oil in the oil storage chamber is heated evenly, so that the temperature of each part of the hydraulic oil inside the hydraulic oil tank 1 is uniform, improving the preheating efficiency of the hydraulic oil and ensuring the accuracy of the temperature detected by the temperature sensor 7.

[0048] Reference Figure 4 , Figure 5 and Figure 6 As a preferred technical solution of the present invention, a working shell 17 is fixedly provided on the inner wall of the oil storage chamber. A piston plate 171 is slidably connected inside the working shell 17. A volatile liquid is filled between the piston plate 171 and the inner wall of the working shell 17. An elastic element 172 is provided between the piston plate 171 and the inner wall of the working shell 17. A heat insulation plate 173 is provided on the side of the piston plate 171 away from the elastic element 172. A recess 18 is opened between the first heat insulation pipe 9031 and the heat conduction pipe 9033. A flexible sealing sheet 181 is connected to the recess 18. The heat insulation plate 173 and the flexible sealing sheet 181 are movably abutted against and movably connected in the recess 18. Specifically, by providing a working shell 17 in the hydraulic oil tank 1 and filling the working shell 17 with a volatile liquid, such as ethanol or acetone, the liquids that evaporate at different temperatures are selected according to the optimal working temperature of the hydraulic oil in the sanitation vehicle hydraulic actuator 4. When the liquid in the oil storage chamber... When the hydraulic oil temperature reaches the optimal operating temperature, the volatile liquid inside the working housing 17 evaporates and exerts force on the piston plate 171, causing the piston plate 171 to move the heat insulation plate 173 downward. The heat insulation plate 173 squeezes the flexible sealing sheet 181, causing the heat insulation plate 173 to move into the concave hole 18 to block the first gas pipe 902. The high-temperature exhaust gas no longer flows in the heat conduction pipe 9033 to heat the hydraulic oil in the hydraulic oil tank 1, preventing the hydraulic oil from deteriorating due to excessive temperature and ensuring that the hydraulic oil can be used normally. When the temperature of the hydraulic oil in the hydraulic oil tank 1 decreases, the gas inside the working housing 17 condenses back into liquid, causing the elastic element 172 to pull the piston plate 171 upward. The heat insulation plate 173 no longer blocks the heat conduction pipe 9033, and the high-temperature exhaust gas emitted by the engine 9 heats the hydraulic oil in the hydraulic oil tank 1 again, ensuring that the hydraulic oil temperature reaches the optimal operating temperature range, allowing the sanitation vehicle to quickly enter the optimal working state.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A preheating system for sanitation vehicles, characterized in that, include: Hydraulic oil tank (1), hydraulic pump (2), main valve (3), hydraulic actuator (4), radiator (5), controller (6), temperature sensor (7) and solenoid directional valve (8); The hydraulic oil tank (1), hydraulic pump (2), main valve (3), hydraulic actuator (4), radiator (5) and solenoid directional valve (8) are connected by hydraulic pipelines. The main valve (3), radiator (5), controller (6), temperature sensor (7) and solenoid directional valve (8) are controlled by electrical wiring harnesses; It also includes an engine (9), which is externally connected to an exhaust pipe (901). The exhaust pipe (901) is connected to a first air pipe (902) and a second air pipe (903). The end of the second air pipe (903) away from the exhaust pipe (901) passes through the hydraulic oil tank (1) and is connected to the first air pipe (902). A one-way valve is provided inside the second air pipe (903). The hydraulic oil tank (1) is rotatably equipped with a partition (10), which divides the hydraulic oil tank (1) into a driving chamber and an oil storage chamber. A mixing component (11) is provided in the oil storage chamber, and a driving component (12) for driving the mixing component (11) is provided in the driving chamber. The second air pipe (903) includes a first heat-insulating pipe (9031) connected to the exhaust pipe (901), a second heat-insulating pipe (9032) connected to the first air pipe (902), and a heat-conducting pipe (9033) disposed between the first heat-insulating pipe (9031) and the second heat-insulating pipe (9032). The heat-conducting pipe (9033) is placed in the oil storage chamber. The drive assembly (12) includes a drive rod (121) rotatably connected to the hydraulic oil tank (1), a drive gear (122) is provided on the drive rod (121), a driven gear (123) is meshed on the outside of the drive gear (122), a rotating tube (124) is connected to the driven gear (123) and is rotatably connected to the hydraulic oil tank (1), and the rotating tube (124) is sleeved on the outside of the first insulation tube (9031); The end of the drive rod (121) away from the hydraulic oil tank (1) passes through the exhaust pipe (901) and extends into it. The drive rod (121) is provided with a toggle piece (1211) on the rod body inside the exhaust pipe (901). The exhaust pipe (901) is provided with a guide block (9011) for guiding the airflow. The mixing component (11) includes a connecting plate (111) connected to the rotating tube (124), a rotating rod (112) is rotatably connected to the connecting plate (111), the rotating rod (112) is fixedly connected to the partition plate (10), and a plurality of equally spaced stirring blades (13) are provided on the rotating rod (112). The stirring blade (13) includes a stirring frame (131) connected to a rotating rod (112). A rotating shaft (132) is rotatably connected inside the stirring frame (131). A stirring plate (133) is provided on the rotating shaft (132). A driven bevel gear (134) is provided on the rotating shaft (132). A gear ring (15) that meshes with the driven bevel gear (134) is fixedly provided on the inner wall of the oil storage chamber. A protective ring (16) is rotatably connected to the inner wall of the oil storage chamber outside the gear ring (15). The protective ring (16) is rotatably arranged with the rotating shaft (132). The inner wall of the oil storage chamber is fixedly provided with a working shell (17), and a piston plate (171) is slidably connected inside the working shell (17). The space between the piston plate (171) and the inner wall of the working shell (17) is filled with a volatile liquid. An elastic element (172) is provided between the piston plate (171) and the inner wall of the working shell (17). A heat insulation plate (173) is provided on the side of the piston plate (171) away from the elastic element (172). A recess (18) is opened between the first heat insulation pipe (9031) and the heat conduction pipe (9033). A flexible sealing sheet (181) is connected to the recess (18). The heat insulation plate (173) and the flexible sealing sheet (181) are movably abutted against and movably connected in the recess (18).

2. The sanitation vehicle warm-up and preheating system according to claim 1, characterized in that, The electromagnetic reversing valve (8) is equipped with a fixed throttling orifice and is controlled by an electromagnet for reversing.

3. The sanitation vehicle warm-up and preheating system according to claim 1, characterized in that, A first sealing ring (14) is provided between the first insulation pipe (9031) and the partition (10), and a second sealing ring (141) is provided between the second insulation pipe (9032) and the hydraulic oil tank (1).

Images