Hydraulic system cooling structure of a cleaning vehicle

Abstract

The utility model provides a kind of cleaning vehicle hydraulic system cooling structure, including operation water container and being arranged in operation water container, the cooling pipe for connecting hydraulic oil pipe in both ends;Two ends of the cooling pipe pass through the operation water container and the position of being worn out is sealed and fixed by welding mode;Or: the intermediate portion of the cooling pipe is located at the bottom of the operation water container;Two wear-out holes are set on the side wall above the highest liquid level of the operation water container;Two ends of the cooling pipe are respectively provided with oil pipe connecting joint;The oil pipe connecting joint part or all is located outside the wear-out hole.The utility model can effectively prevent oil leakage, and the connecting structure is stable and reliable.Furthermore, fixed support is arranged in operation water container, so that the vibration of cooling pipe caused by hydraulic oil through cooling pipe can be effectively prevented.

Description

Technical Field

[0001] This utility model belongs to the field of cleaning vehicles, and specifically relates to a cooling structure for the hydraulic system of a cleaning vehicle. Background Technology

[0002] Currently, most domestic sanitation vehicles use external air cooling for their hydraulic systems. This method is expensive, cumbersome to maintain, and unsightly. Furthermore, the water used in sanitation vehicles is only used for operation and not for cooling, resulting in significant waste. Patent CN208885694U discloses a water-cooling device for the hydraulic oil pipes of a road sweeper. The hydraulic oil pipes pass through the interior of a water tank, and the water in the tank cools the hydraulic oil pipes, effectively saving on cooling costs. However, this solution also has some problems. The water tank is pressurized, and although a seal can be installed at the gap at the bottom of the tank where the cooling steel pipe passes, oil leaks are likely to occur over time. Moreover, when hydraulic oil passes through the cooling steel pipe, the steel pipe can vibrate, affecting the stability and quality of the hydraulic oil pipe. Summary of the Invention

[0003] This utility model provides a cooling structure for the hydraulic system of a cleaning vehicle.

[0004] The purpose of this utility model is achieved in the following manner: a cooling structure for a cleaning vehicle's hydraulic system, comprising a working water container and a cooling pipe disposed inside the working water container, with both ends for connecting hydraulic oil pipes; the two ends of the cooling pipe pass through the working water container and the exit points are sealed and fixed by welding; or: the middle part of the cooling pipe is located at the bottom of the working water container; two exit holes are provided on the side wall corresponding to the highest liquid level of the working water container; oil pipe connection joints are respectively provided at both ends of the cooling pipe; the oil pipe connection joints are partially or entirely located outside the exit holes.

[0005] The cooling pipe is located at the bottom of the working water container. Both ends of the cooling pipe pass through the bottom of the working water container and are sealed and fixed by welding at the exit points. Oil pipe joints are welded to both ends of the cooling pipe.

[0006] The middle part of the cooling pipe is located at the bottom of the working water container; two through holes are provided on the side wall corresponding to the highest liquid level of the working water container; the two ends of the cooling pipe are sealed and fixed by welding at the positions where they pass through the through holes, and oil pipe joints are welded to both ends of the cooling pipe.

[0007] The oil pipe connection joint is a through-plate joint set in the through hole; the end of the cooling pipe is fixed to the through-plate joint on the side inside the working water container by a connecting nut; the through-plate joint on the side outside the working water container is used to connect the hydraulic oil pipe.

[0008] Several fixed supports are fixedly installed on the inner wall of the water container corresponding to the position of the cooling pipe; the fixed supports are fixedly connected to the outer wall of the cooling pipe.

[0009] The fixed bracket is installed on the bottom wall of the working water container or on the bottom wall and side wall; one end of the fixed bracket is welded to the inner wall of the working water container and the other end is welded to the outer surface of the cooling pipe.

[0010] The shortest length L of the cooling pipe located within the operating water during operation is calculated as: L = Q * 3600 * 0.239 * 1000 * k2 * 2 / ((T1 + T2 - 2t) * k1 * D * 3.14); where L is the shortest length of the cooling pipe (m); Q is the heating power of the hydraulic system (kW); k2 is the heat dissipation safety factor; T1 is the inlet oil temperature of the cooling device (degrees Celsius); T2 is the outlet oil temperature of the cooling device (degrees Celsius); t is the cooling water temperature (degrees Celsius); and k1 is the heat exchange coefficient (degrees Celsius). D: Cooling pipe diameter, in mm.

[0011] Compared to existing technologies, this invention effectively prevents oil leakage and features a stable and reliable connection structure. Furthermore, the invention incorporates a fixed support within the working water container, effectively preventing vibrations in the cooling pipes that may occur when hydraulic oil flows through them. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of one embodiment of the present invention (the arrow indicates the direction of hydraulic oil flow).

[0013] Figure 2 This is a schematic diagram of another embodiment of the present invention (the arrows indicate the direction of hydraulic oil flow).

[0014] Figure 3 This is a schematic diagram of the welding structure between the end of the cooling pipe and the container for operating water.

[0015] Figure 4 This is a schematic diagram of the connection structure between the end of the cooling pipe and the through-plate connector inside the working water container.

[0016] Figure 5 This is a schematic diagram showing the connection between the fixed bracket and the cooling pipe.

[0017] Figure 6 yes Figure 5 The view from the other side.

[0018] Among them, 1 is the water container for operation, 2 is the cooling pipe, 3 is the fixed bracket, 4 is the oil pipe joint, 5 is the through plate joint, and 6 is the hydraulic oil pipe. Detailed Implementation

[0019] In this utility model, unless otherwise expressly specified and limited, the technical terms used in this application shall have the ordinary meaning understood by those skilled in the art. Terms such as "connected," "linked," "fixed," and "set" shall be interpreted broadly, referring to fixed connections, detachable connections, or integral connections; direct connections or indirect connections via an intermediate medium; mechanical connections or electrical connections. Unless otherwise expressly specified and limited, "above" or "below" a second feature may mean that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," or "over" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "under" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Relational terms such as "first," "second," etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms used in the description, such as “center,” “lateral,” “longitudinal,” “length,” “width,” “thickness,” “height,” “front,” “rear,” “left,” “right,” “up,” “down,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “axial,” “radial,” “circumferential,” “clockwise,” and “counterclockwise,” 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 this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Figure 1-6As shown, a cooling structure for a cleaning vehicle's hydraulic system includes a working water container 1 and cooling pipes 2 disposed within the working water container 1, with both ends connected to hydraulic oil pipes 6. The two ends of the cooling pipes 2 pass through the working water container 1, and their exit points are sealed and fixed by welding. Alternatively, the middle portion of the cooling pipe 2 is located at the bottom of the working water container 1. Two exit holes are provided on the side wall corresponding to the highest liquid level in the working water container 1. Oil pipe connection joints are respectively provided at both ends of the cooling pipe 2. The oil pipe connection joints are partially or entirely located outside the exit holes. In the option where the cooling pipe passes through the working water container by welding, the exit point can be sealed at any position within the working water container. In the option where the cooling pipe passes through by non-welding methods such as oil pipe connection joints, the exit point is preferably located above the liquid level in the working water container. Because the connection point between the oil pipe connection joint and the cooling pipe 2 is located above the liquid level, welding or threaded connections can meet the requirements.

[0021] Furthermore, such as Figure 1 As shown, the cooling pipe 2 is located at the bottom of the working water container 1. Both ends of the cooling pipe 2 pass through the bottom of the working water container 1, and the exit points are sealed and fixed by welding. Oil pipe connectors 4 are welded to both ends of the cooling pipe 2. See the attached drawings for details. Figure 1 The structure shown is as follows. The cooling pipe 2 is inserted through the container wall of the working water container 1 at both ends, and the joint is welded (e.g., ...). Figure 3 The cooling pipe 2 is fixed and sealed (as shown). It is positioned near the bottom of the working water container 1, ensuring sufficient length of the cooling pipe 2 remains submerged in water until the working water level drops to the minimum. The oil pipe connector 4 is pre-installed outside the working water container 1, ensuring convenient pipe connection and preventing potential oil leaks from occurring outside the container, thus guaranteeing the safety and reliability of the hydraulic system. For structures where the oil pipe connector 4 is located below the water surface (below the working water container 1), the cooling pipe 2 can be inserted through the container before the oil pipe connector 4 is welded. The cooling pipe 2 should ideally be a single, continuous pipe inside the working water container 1 to avoid weld seams inside the container. The oil pipe connector 4 can be an existing connector or a custom-designed connector, as long as it meets the connection requirements. Alternatively, for designs where both ends of the cooling pipe are located elsewhere in the working water container, welding can be used to pass through the pipe and weld the oil pipe connector, resulting in a more secure connection.

[0022] Furthermore, such as Figure 2As shown, the oil pipe connection joint is a through-plate joint 5 installed in the through-hole; the end of the cooling pipe 2 is fixed to the through-plate joint 5 on one side inside the working water container 1 by a connecting nut; the through-plate joint 5 on the outside of the working water container 1 is used to connect the hydraulic oil pipe 6. The through-plate joint 5 is an existing part, and nuts are respectively installed on the inner and outer sides of the through-hole. The advantage of this structure is that welding is not required, and the assembly of the entire cooling system can be completed through the simple connection of the joint and nuts, and disassembly and assembly are convenient. Therefore, for the scheme where the cooling pipe's through-hole is below the liquid surface, welding is preferred for fixing and welding the oil pipe joint to avoid oil leakage. For the scheme where the cooling pipe's through-hole is above the liquid surface, welding can be used to pass through and connect the oil pipe joint; alternatively, the through-plate joint can be used to pass through the working water container and directly connect the hydraulic oil pipe, reducing construction costs and improving efficiency.

[0023] Furthermore, several fixed supports 3 are fixedly installed on the inner wall of the water container 1 corresponding to the position of the cooling pipe 2; the fixed supports 3 are fixedly connected to the outer wall of the cooling pipe 2. In this utility model, the cleaning vehicle's own water supply is used, and cooling pipes 2 are arranged inside the water container 1. High-temperature hydraulic oil exchanges heat with water through the cooling pipes 2, thus cooling the hydraulic oil. Combining the cooling of the hydraulic system with the vehicle's own water supply ensures the cooling effect of the hydraulic system and improves the utilization rate of the water supply, thereby improving economic efficiency. Moreover, the fixed supports 3 installed inside the water container 1 effectively prevent vibration of the cooling pipes that may occur when hydraulic oil passes through the cooling pipes 2. The shape of the fixed supports 3 can be determined according to needs and various options are available.

[0024] Furthermore, the fixing bracket 3 is disposed on the bottom wall of the working water container 1, or on both the bottom and side walls; one end of the fixing bracket 3 is welded to the inner wall of the working water container, and the other end is welded to the outer surface of the cooling pipe 2. Specifically, the fixing bracket 3 can be a plate-like structure. For example, the fixing bracket 3 is a fixing plate; the bottom of the plate-like structure is welded to the inner wall of the working water container, and the other end of the fixing plate can be in the shape of a circular groove, corresponding to the circumferential surface of the cooling pipe 2 and fixedly connected by a weld. Because the cooling pipe 2 needs to be placed inside the working water container 1 and arranged as far to the bottom as possible to ensure that there is still a sufficient length of cooling pipe 2 immersed in water before the working water is consumed to the minimum liquid level, most of the length of the cooling pipe 2 is close to the bottom, and several fixing brackets 3 need to be spaced out at corresponding positions on the bottom wall of the working water container 1. Whether to set fixing brackets 3 on the side wall of the working water container 1 needs to be determined according to the shape of the cooling pipe 2 and the position of both ends. When both ends of the cooling pipe 2 extend upward to the upper end of the working water container 1, a fixed bracket 3 needs to be installed on the corresponding side wall. At this time, the fixed bracket 3 supports the cooling pipe 2 from the side of the working water container 1.

[0025] Preferably, the shortest length L of the cooling pipe 2 located in the working water during operation is calculated as: L = Q * 3600 * 0.239 * 1000 * k2 * 2 / ((T1 + T2 - 2t) * k1 * D * 3.14); where L is the shortest length of the cooling pipe 2 (m); Q is the heating power of the hydraulic system (kW); k2 is the heat dissipation safety factor; T1 is the inlet oil temperature of the cooling device (degrees Celsius); T2 is the outlet oil temperature of the cooling device (degrees Celsius); t is the cooling water temperature (degrees Celsius); and k1 is the heat exchange coefficient (kcal / m). 2 h℃; D: Diameter of cooling pipe 2, in mm. k2 is set as needed, with a recommended value of 1.2. The recommended value for k1 is 400 kcal / m³. 2 h℃. The calculated L is the minimum heat exchange length value obtained by formula based on the heat generation of different vehicles.

[0026] In this invention, the cooling pipe 2 is preferably made of stainless steel, followed by carbon steel, copper, aluminum, etc. The cooling pipe 2 undergoes anti-corrosion treatment as needed. Welding is the preferred method for the oil inlet and outlet interfaces of the cooling pipe 2. If the oil inlet and outlet are above the water surface, a through-plate connector 5 or threaded connection can be used. This cooling structure is simple, reliable, and has low maintenance costs. The cooling pipe 2 should ideally be a single, continuous pipe inside the container to avoid weld seams within the cooling pipe 2 inside the container.

[0027] This utility model integrates hydraulic cooling pipes inside the working water container, which greatly saves costs. The design life of the cooling pipes is the same as that of the working water container itself, so no additional maintenance is required, saving maintenance costs. The cooling pipes are hidden inside the working water container, which improves the aesthetics.

[0028] The technical features of the embodiments described above can be combined in any way, and as long as there is no contradiction in the combination of these technical features, they should all be considered within the scope of this specification. Without departing from the overall concept of this utility model, any equivalent substitutions or modifications made to the technical solution of this utility model, as well as any changes and improvements, should also be considered within the protection scope of this utility model.

Claims

1. A cooling structure for a cleaning vehicle's hydraulic system, comprising a working water container and cooling pipes disposed within the working water container, with both ends for connecting hydraulic oil pipes; characterized in that: The cooling pipe passes through the working water container at both ends and the exit points are sealed and fixed by welding; or: the middle part of the cooling pipe is located at the bottom of the working water container; two exit holes are provided on the side wall corresponding to the highest liquid level of the working water container; oil pipe connection joints are respectively provided at both ends of the cooling pipe; the oil pipe connection joints are partially or entirely located outside the exit holes.

2. The cooling structure for the hydraulic system of a cleaning vehicle according to claim 1, characterized in that: The cooling pipe is located at the bottom of the working water container. Both ends of the cooling pipe pass through the bottom of the working water container and are sealed and fixed by welding at the exit points. Oil pipe joints are welded to both ends of the cooling pipe.

3. The cooling structure for the hydraulic system of a cleaning vehicle according to claim 1, characterized in that: The middle part of the cooling pipe is located at the bottom of the working water container; two through holes are provided on the side wall corresponding to the highest liquid level of the working water container; the two ends of the cooling pipe are sealed and fixed by welding at the positions where they pass through the through holes, and oil pipe joints are welded to both ends of the cooling pipe.

4. The cooling structure for the hydraulic system of a cleaning vehicle according to claim 1, characterized in that: The oil pipe connection joint is a through-plate joint set in the through hole; the end of the cooling pipe is fixed to the through-plate joint on the side inside the working water container by a connecting nut; the through-plate joint on the side outside the working water container is used to connect the hydraulic oil pipe.

5. A cooling structure for a cleaning vehicle's hydraulic system according to any one of claims 1-4, characterized in that: Several fixed supports are fixedly installed on the inner wall of the water container corresponding to the position of the cooling pipe; the fixed supports are fixedly connected to the outer wall of the cooling pipe.

6. The cooling structure for the hydraulic system of a cleaning vehicle according to claim 5, characterized in that: The fixed bracket is installed on the bottom wall of the working water container or on the bottom wall and side wall; one end of the fixed bracket is welded to the inner wall of the working water container and the other end is welded to the outer surface of the cooling pipe.

7. The cooling structure for the hydraulic system of a cleaning vehicle according to claim 1, characterized in that: The shortest length L of the cooling pipe located in the working water during operation is calculated as: L = Q * 3600 * 0.239 * 1000 * k2 * 2 / ((T1 + T2 - 2t) * k1 * D * 3.14); where L is the shortest length of the cooling pipe, in meters. Q: Heating power of hydraulic system, unit Kw; k2: Heat dissipation safety factor; T1: Inlet oil temperature of the cooling device, in degrees Celsius; T2: Cooling device outlet oil temperature, in degrees Celsius; t: Cooling water temperature, in degrees Celsius; k1: Heat exchange coefficient, unit is kcal / m 2 h℃; D: Cooling pipe diameter, in mm.

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