Hydraulic oil tank and concrete pump truck

Abstract

The present invention relates to the field of construction machinery, and discloses a hydraulic oil tank and a pump truck. The hydraulic oil tank includes a box body having an inner cavity. A partition is arranged in the inner cavity of the box body to respectively form an oil return chamber and an oil suction chamber on both sides of the partition. A guiding component having a guiding hole is further arranged in the inner cavity of the box body, and the oil return chamber is communicated with the oil suction chamber through the guiding hole. By arranging the guiding component in the box body, the present invention enables the oil liquid to enter the oil suction chamber after being guided by the guiding component after entering the oil return chamber. By adopting the guiding component, not only can the flow path of the oil liquid be increased, the oil liquid be fully exchanged and effectively cooled, but also the bubbles in the oil liquid can be effectively precipitated, and at the same time, the guiding component can play a role in blocking the impurities doped in the oil liquid.

Description

Technical Field

[0001] The present invention relates to the field of construction machinery, and in particular, to a hydraulic oil tank and a pump truck. Background Art

[0002] A hydraulic oil tank, that is, a container for loading hydraulic oil, is an important component in a hydraulic system. In addition to loading hydraulic oil, the hydraulic oil tank also plays roles such as heat dissipation, separating air bubbles in the oil, and precipitating impurities in the oil. The temperature of the oil affects the service life of the oil, and the impurities therein accelerate the wear of the terminal actuator cylinder and related hydraulic valves. The air bubbles in the oil cause cavitation of hydraulic components, affecting the service life of the components.

[0003] In a traditional oil tank for a hydraulic system, the oil usually enters the oil tank from the oil return port, and then enters the oil suction port through the partition between the oil return chamber and the oil suction chamber. The flow path of the oil is short, which is not conducive to the cooling of the oil, the precipitation effect of air bubbles in the oil is poor, and the precipitation effect of impurities is also poor. Summary of the Invention

[0004] The purpose of the present invention is to provide a hydraulic oil tank to solve the technical problems in the prior art that it is difficult to precipitate air bubbles in the oil, the oil cooling effect is poor, and the precipitation effect of impurities in the oil is not good.

[0005] To achieve the above purpose, a first aspect of the present invention provides a hydraulic oil tank, including a box body having an inner cavity. A partition is provided in the inner cavity of the box body to form an oil return chamber and an oil suction chamber on both sides of the partition respectively. A guiding member having a guiding hole is further provided in the inner cavity of the box body, and the oil return chamber communicates with the oil suction chamber through the guiding hole.

[0006] Further, an oil return port is opened on the box body, and an oil return member communicating with the oil return chamber is connected to the oil return port;

[0007] The bottom edge of the partition is connected to the bottom plate of the box body. The guiding member is a grid plate provided on one side of the partition. The grid plate includes a first plate body and a second plate body. The first plate body is disposed opposite to the bottom plate of the box body and forms a through hole for the oil return member to pass through; the second plate body extends from one end of the first plate body to the bottom plate of the box body, and the guiding hole is provided on the second plate body.

[0008] Further, the guiding hole is a long hole, and the edge of the long hole is wavy; wherein, the wavy shape is formed by connecting a plurality of arc-shaped grooves or a plurality of rectangular grooves.

[0009] Further, the first plate body gradually inclines downward from the end close to the second plate body to the end far from the second plate body.

[0010] Furthermore, the second plate body is inclined downward and away from the first plate body, and a first oil passage opening is provided on the second plate body.

[0011] Furthermore, the oil return component includes an oil return cylinder connected to the oil return port and located inside the box body. A oil return guiding pipe is connected below the oil return cylinder. The oil return guiding pipe passes through the through hole and extends into the oil return chamber and can supply oil to the oil return chamber.

[0012] Furthermore, an oil outlet is provided on the oil return guiding pipe. The oil outlet is located inside the oil return chamber, and the opening direction of the oil outlet faces away from the second plate body.

[0013] Furthermore, the oil return guiding pipe includes a vertical section connected to the oil return cylinder and an inclined section connected to the vertical section. The oil outlet is opened at the end of the inclined section.

[0014] Furthermore, the oil outlet is an inclined cut opened at the end of the inclined section.

[0015] Furthermore, the oil return guiding pipe is cylindrical. The distance between the oil outlet and the inner wall surface of the box body is greater than 3 - 4 times the diameter of the oil outlet.

[0016] Furthermore, the side wall of the box body opposite to the second plate body is formed into a U-shaped plate with an opening facing the inside of the box body. The U-shaped plate includes a vertical plate and first and second inclined plates connected to both ends of the vertical plate. The first inclined plate is connected to the top plate of the box body, and the second inclined plate is connected to the bottom plate of the box body.

[0017] Furthermore, the opening direction of the oil outlet is set to face the second inclined plate.

[0018] Furthermore, the bottom plate of the box body is stepped and includes a first bottom plate, a second bottom plate, and a third bottom plate connected between the first bottom plate and the second bottom plate. The height of the first bottom plate is lower than the height of the second bottom plate;

[0019] The bottom edge of the partition plate is provided on the first bottom plate. The first plate body is disposed opposite to the first bottom plate, and the bottom end of the second plate body is connected to the first bottom plate; or the bottom end of the second plate body is connected to the connection portion between the first bottom plate and the third bottom plate.

[0020] Further, one end of the first bottom plate close to the third bottom plate slopes upward gradually towards the end away from the third bottom plate; and / or, one end of the second bottom plate close to the third bottom plate slopes upward gradually towards the end away from the third bottom plate; and / or, the third bottom plate slopes downward towards the grille plate.

[0021] Further, an oil drain port is provided on the first bottom plate.

[0022] Further, a plugging port is provided on the top plate of the box body, and at least one of the plugging ports is arranged directly above the first bottom plate.

[0023] Further, an oil suction port communicating with the oil suction chamber is provided on the box body, and an oil suction component located in the oil suction chamber is connected to the oil suction port.

[0024] Further, the oil suction component is an oil suction hood connected to the bottom plate of the box body, and the oil fluid channel formed by surrounding the oil suction hood and the bottom plate tapers from the part close to the oil suction port towards the part away from the oil suction port.

[0025] Further, air vent holes are provided on the oil suction hood.

[0026] Further, a second oil passing port communicating the oil return chamber and the oil suction chamber is provided on the part of the partition plate outside the guiding component.

[0027] Further, an air filter mounting hole is provided on the top plate of the box body, and an air filter is arranged in the air filter mounting hole.

[0028] Further, a strengthening structure is provided inside the box body, and the strengthening structure includes strengthening plates arranged on the inner wall of the box body.

[0029] The second aspect of the present invention provides a pump truck, including the hydraulic oil tank as described above.

[0030] After adopting the above technical solutions, the present invention mainly has the following beneficial effects compared with the prior art:

[0031] By arranging a guiding component inside the box body, the present invention enables the oil fluid to enter the oil return chamber and then enter the oil suction chamber through the diversion of the guiding component. By adopting this guiding component, not only can the flow path of the oil fluid be increased, the oil fluid be fully exchanged and effectively cooled, but also the air bubbles in the oil fluid can be effectively precipitated, and at the same time, the impurities doped in the oil fluid can be blocked.

[0032] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the present invention and form a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention.

[0034] In the accompanying drawings:

[0035] Figure 1 is a schematic perspective view of the hydraulic oil tank of the present invention Figure 1 ;

[0036] Figure 2 is a schematic perspective view of the hydraulic oil tank of the present invention Figure 2 ;

[0037] Figure 3 is the front view of the hydraulic oil tank of the present invention;

[0038] Figure 4 is a schematic structural view of the partition and the guiding member of the present invention;

[0039] Figure 5 is the side view of the partition and the guiding member of the present invention;

[0040] Figure 6 is the top view of the partition and the guiding member of the present invention Figure 1 ;

[0041] Figure 7 is the top view of the partition and the guiding member of the present invention Figure 2 ;

[0042] Figure 8 is the top view of the partition and the guiding member of the present invention Figure 3 ;

[0043] Figure 9 is the top view of the partition and the guiding member of the present invention Figure 4 ;

[0044] Figure 10 is the side view of the bottom plate of the present invention;

[0045] Figure 11 is a schematic structural view of the oil return assembly of the present invention;

[0046] Figure 12 is a schematic structural view of the oil suction hood of the present invention;

[0047] Figure 13 is the side view of the oil suction hood of the present invention.

[0048] Explanation of reference numerals:

[0049] 1. Box body; 11. Top plate; 111. Oil return port; 112. Air filter installation hole; 113. Plugging port; 12. Bottom plate; 121. First bottom plate; 1211. Oil drain port; 122. Second bottom plate; 123. Third bottom plate; 13. First side plate; 131. First inclined plate; 132. Vertical plate; 133. Second inclined plate; 14. Second side plate; 15. Third side plate; 151. Oil suction port; 16. Fourth side plate;

[0050] 2. Partition board; 21. Second oil passing port;

[0051] 3. Grille plate; 31. First plate body; 311. Through hole; 32. Second plate body; 321. Guide hole; 322. First oil passing port;

[0052] 4. Oil return cylinder;

[0053] 5. Oil return guide pipe; 51. Vertical section; 52. Inclined section; 521. Oil outlet;

[0054] 6. Oil suction hood; 61. Vent hole.

[0055] 7. Reinforcing plate. Detailed implementation manners

[0056] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0057] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0058] As Figures 1-13 shown, the present invention discloses a hydraulic oil tank, whose main function is to provide oil for the boom extension and retraction of the pump truck to the hydraulic cylinder for amplitude variation. The hydraulic oil tank described in the present invention includes a box body 1 with an inner cavity. A partition board 2 is arranged in the box body 1, and an oil return chamber and an oil suction chamber are respectively formed on both sides of the partition board 2. Among them, a guiding component with a guiding hole 321 is also arranged in the inner cavity of the box body 1. The oil return chamber communicates with the oil suction chamber through the guiding hole 321 of the guiding component, and the oil in the oil return chamber enters the oil suction chamber through the guiding hole 321 of the guiding component.

[0059] In the above technical solution, a guiding component capable of filtering air bubbles in the oil is arranged in the box body 1. After the oil enters the oil return chamber, it enters the oil suction chamber through the filtering of the guiding holes 321 on the guiding component. The guiding component changes the flow path of the oil, increases the flow length of the oil, enables the oil to be fully exchanged and effectively cooled, and can also effectively precipitate the air bubbles in the oil. At the same time, it plays a role in blocking the impurities doped in the oil.

[0060] In a preferred embodiment of the present invention, the box body 1 includes a top plate 11 and a bottom plate 12, and a first side plate 13, a second side plate 14, a third side plate 15 and a fourth side plate 16 are arranged between the top plate 11 and the bottom plate 12.

[0061] Furthermore, an oil return port 111 is formed on the box body 1. Preferably, the oil return port 111 is formed on the top plate 11 of the box body 1. An oil return component communicating with the oil return chamber is connected to the oil return port 111.

[0062] The bottom edge of the partition plate 2 is connected to the bottom plate 12 of the box body 1. The guiding component is a grid plate 3 arranged on one side of the partition plate 2, and the grid plate 3 is located in the oil return chamber. Specifically, the grid plate 3 includes a first plate body 31 and a second plate body 32. The first plate body 31 is arranged opposite to the bottom plate 12 of the box body 1, and a through hole 311 for the oil return component to pass through is formed on the first plate body 31; the second plate body 32 extends from one end of the first plate body 31 to the bottom plate 12 of the box body 1, and the guiding holes 321 are arranged on the second plate body 32.

[0063] In the above technical solution, the oil return component supplies oil to the oil return chamber. After the oil enters the oil return chamber body, it flows out through the guiding holes 321 on the second plate body 32. The guiding holes 321 can effectively precipitate the air bubbles in the oil, and at the same time play a role in blocking the impurities doped in the oil.

[0064] Furthermore, the guiding holes 321 are long strip holes. Preferably, a plurality of the long strip holes can be arranged, and the plurality of long strip holes are arranged at intervals on the second plate body 32.

[0065] In the above technical solution, the arrangement of the plurality of long strip holes can effectively ensure the flow of the fluid, which is beneficial to the oil inside the box body 1 flowing out of the oil return chamber in a laminar flow manner, reducing the flow rate of the oil and facilitating the precipitation of the air bubbles in the oil.

[0066] The edges of the long strip holes are wavy. In a preferred embodiment, as Figure 6As shown, the wavy shape is formed by alternating connection of arc-shaped grooves and arc-shaped protrusions. Preferably, the arc-shaped grooves at the upper and lower edges of the long hole correspond to the arc-shaped protrusions, that is, the opening directions of the arc-shaped grooves and the arc-shaped protrusions are the same.

[0067] In another embodiment, as Figure 7 shown, the wavy shape is formed by alternating connection of the arc-shaped grooves and straight segments. Or, as Figure 8 shown, the wavy shape is formed by alternating connection of rectangular grooves and straight segments. Or, the wavy shape is formed by sequential connection of a plurality of rectangular grooves. Or, as Figure 9 shown, the wavy shape is formed by sequential connection of a plurality of arc-shaped grooves.

[0068] The guiding hole 321 arranged in this way can greatly increase the surface area of the oil fluid and the guiding hole 321. During the process of the oil fluid flowing out from the guiding hole 321, the air bubbles in the oil fluid will be adsorbed on the guiding hole 321. With a larger surface area, more air bubbles can be adsorbed by the guiding hole 321 of the same width. The small air bubbles gather at the guiding hole 321, converge into large air bubbles, and then overcome the oil fluid resistance and their own gravity, resist the viscosity of the oil fluid, and escape upward, so as to achieve the purpose of reducing the gas content in the oil fluid.

[0069] In the above technical solution, different-shaped guiding holes 321 are set to increase the contact area between the guiding hole 321 and the oil fluid, increase the aggregation of air bubbles, and make the air bubbles in the oil fluid precipitate better.

[0070] As Figures 4-5 shown, one end of the first plate body 31 close to the second plate body 32 gradually inclines downward toward the end far from the second plate body 32. The included angle d between the first plate body 31 and the horizontal plane is generally 1 - 3 degrees. The density of the gas is lower than that of the oil fluid, which is beneficial for the air bubbles in the oil fluid in the oil return chamber to float and gather at the guiding hole 321 or escape from the guiding hole 321.

[0071] Furthermore, the second plate body 32 inclines downward in a direction away from the first plate body 31 from top to bottom. The second plate body 32 is arranged obliquely, which is convenient for the oil fluid to diverge upward after flowing out from the guiding hole 321. In addition, a first oil passing port 322 is provided on the second plate body 32. Preferably, the first oil passing port 322 is a notch opened at the bottom edge of the second plate body 32. When cleaning the fuel tank, by increasing the first oil passing port 322, the oil fluid in the oil suction chamber and the residues at the bottom of the fuel tank can flow back into the oil return chamber through the first oil passing port 322, so that the oil fluid in the fuel tank can be drained completely.

[0072] In an embodiment of the present invention, the oil return component includes an oil return cylinder 4 connected to the oil return port 111 and located inside the box body 1. A oil return guide pipe 5 is connected below the oil return cylinder 4. The oil return guide pipe 5 passes through the through hole 311 and extends into the oil return chamber and can supply oil to the oil return chamber.

[0073] In the above technical solution, the oil inlet of the oil return cylinder 4 is connected to the oil return port 111, the oil outlet 521 of the oil return cylinder 4 is connected to the oil return guide pipe 5, and a return filter element is arranged in the oil return cylinder 4. Oil enters the oil return cylinder 4 from the oil return port 111, and then enters the oil return chamber through the oil return guide pipe 5 to supply oil to the oil return chamber. Among them, the diameter of the oil return guide pipe 5 is 50 mm - 60 mm, so that when the oil flows out of the oil return guide pipe 5, a relatively small flow rate is maintained.

[0074] As Figure 11 shown, an oil outlet 521 is arranged on the oil return guide pipe 5. The oil outlet 521 is located in the oil return chamber, and the opening direction of the oil outlet 521 faces away from the second plate body 32. The oil return guide pipe 5 includes a vertical section 51 connected to the oil return cylinder 4 and an inclined section 52 connected to the vertical section 51. The oil outlet 521 is opened at the end of the inclined section 52.

[0075] By arranging the inclined section 52, the oil return guide pipe 5 can change the oil flow angle by a certain bending angle, so that the opening direction of the oil outlet 521 faces the first side plate 13 of the box body 1, and the flow rate of the oil when entering the oil return chamber is reduced. Further, the oil outlet 521 is opened at an oblique cut at the end of the inclined section 52. The oil outlet 521 has a certain oblique cut angle, generally about 45 degrees, to increase the cross-sectional area of the oil outlet 521 and reduce the flow rate of the oil when flowing out. Reducing the flow rate of the oil when entering the oil return chamber can prevent the flow rate of the oil from being too large to disturb the impurity deposits at the bottom of the fuel tank.

[0076] Further, the oil return guide pipe 5 is cylindrical, and the distance between the oil outlet 521 and the inner wall surface of the box body 1 is greater than 3 - 4 times the diameter of the oil outlet 521. More specifically, the distance between the oil outlet 521 and the bottom plate 12 of the box body 1 is greater than 3 - 4 times the diameter of the oil outlet 521; the distance between the oil outlet 521 and the first side plate 13 of the box body 1 is greater than 3 - 4 times the diameter of the oil outlet 521. This can effectively prevent the oil from impacting the inner wall of the box body 1 at a high flow rate.

[0077] In the present invention, the side wall of the box body 1 opposite to the second plate body 32 is formed into a U-shaped plate with an opening facing the inside of the box body 1. That is to say, the first side plate 13 of the box body 1 is a U-shaped plate with an opening facing the inside of the box body 1. The U-shaped plate includes a vertical plate 132 and first inclined plates 131 and second inclined plates 133 connected to both ends of the vertical plate 132. The first inclined plate 131 is connected to the top plate 11 of the box body 1, and the second inclined plate 133 is connected to the bottom plate 12 of the box body 1. Preferably, the oil outlet 521 is arranged facing the second inclined plate 133 of the first side plate 13.

[0078] Among them, the first inclined plate 131 is inclined at a certain angle mainly to cooperate with the overall layout of the fuel tank on the pump truck and make space layout avoidance, which is specifically determined according to the components around the layout position of the fuel tank on the pump truck. The included angle between the second inclined plate 133 and the vertical plate 132 is generally between 90 degrees and 135 degrees, which is mainly determined according to the components around the layout position of the fuel tank on the pump truck. For example, the second inclined plate 133 is parallel to the second plate body 32, and at the same time, the oil return guide pipe 5 can vertically impact on the second inclined plate 133 to make the oil liquid diffuse.

[0079] As Figure 10 shown, in the present invention, the bottom plate 12 of the box body 1 is in a stepped shape, mainly to maintain a relatively high liquid level height on the premise of the same volume of oil liquid and ensure that the lower oil suction port 151 is completely immersed in the oil liquid.

[0080] Specifically, the bottom plate 12 of the box body 1 is in a stepped shape. The bottom plate 12 includes a first bottom plate 121 connected to the first side plate 13 of the box body 1, a second bottom plate 122 connected to the second side plate 14 of the box body 1, and a third bottom plate 123 connecting the first bottom plate 121 and the second bottom plate 122. The height of the first bottom plate 121 is lower than the height of the second bottom plate 122.

[0081] Furthermore, the bottom edge of the partition 2 is arranged on the first bottom plate 121. The first plate body 31 is arranged opposite to the first bottom plate 121, and the bottom end of the second plate body 32 is connected to the first bottom plate 121; or the bottom end of the second plate body 32 is connected to the connection part of the first bottom plate 121 and the third bottom plate 123.

[0082] The partition 2 ensures that the oil in the oil return chamber flows out through the guide hole 321 and then passes over the partition 2 upward, thereby lengthening the oil flow path. The partition 2 is provided with a second oil passage 21 connecting the oil return chamber and the oil suction chamber at the outer side of the oil return chamber. Preferably, the second oil passage 21 is provided with a notch at the bottom edge of the partition 2. More preferably, the second oil passage 21 is an arc-shaped hole with a radius of 5-10 mm, so that the oil suction hood 6 can flow from one side of the oil return chamber to the oil suction chamber during the oil discharge process.

[0083] The first bottom plate 121 gradually tilts upward from one end close to the third bottom plate 123 to one end away from the third bottom plate 123. The angle a between the first bottom plate 121 and the horizontal plane is generally 1-2 degrees, so that the fine pollutants that are not filtered out in the oil can sink to the bottom of the oil tank, which is conducive to the accumulation of precipitated impurities in the oil.

[0084] The third bottom plate 123 is inclined from top to bottom toward the first side plate 13 of the box body 1. The angle b between the third bottom plate 123 and the vertical plane is generally about 3-5 degrees, which facilitates the oil to flow out of the guide hole 321. The oil is reflected by the third bottom plate 123 and flows upward, which is conducive to the upward discharge of bubbles in the oil.

[0085] The second bottom plate 122 is gradually inclined upward from one end close to the third bottom plate 123 to one end away from the third bottom plate 123. The angle a between the second bottom plate 122 and the horizontal plane is generally 1-2 degrees, so that the lowest position in the oil tank is more concentrated, and the fine pollutants in the oil that are not filtered out by the guide holes 321 can sink to the bottom of the oil tank, which is conducive to the accumulation of precipitated impurities in the oil at the lowest position.

[0086] Furthermore, an oil drain port 1211 is provided on the first bottom plate 121. Preferably, the oil drain port 1211 is located at the lowest position of the first bottom plate 121, which is conducive to directly draining impurities in the oil through the oil drain port 1211 when there are many impurities in the oil tank.

[0087] It should be noted that the box body 1 is provided with an oil suction port 151 connected to the oil suction chamber, and the oil suction port 151 is connected to an oil suction component located in the oil suction chamber. Further, the oil suction component is an oil suction cover 6 connected to the bottom plate 12 of the box body 1, and the oil channel formed by the oil suction cover 6 and the bottom plate 12 gradually narrows from the direction close to the oil suction port 151 to the direction away from the oil suction port 151.

[0088] In the above technical solution, the oil suction hood 6 is arranged to keep the oil suction port 151 always below the liquid level, and at the same time ensure that the oil suction port 151 does not suck in air during the oil suction process, so as to ensure that the oil liquid enters the oil suction port 151 from the oil liquid channel during the oil suction process. At the same time, it forms a longer flow path with the flowing oil liquid on the second plate body 32, and the oil liquid is fully exchanged.

[0089] As Figure 13 shown, the angle e between the top surface of the oil suction hood 6 and the horizontal plane is about 3-5 degrees, so as to ensure the oil liquid level at the position of the oil suction port 151.

[0090] Furthermore, the oil suction hood 6 is provided with a vent hole 61. Preferably, the vent hole 61 is opened at the top surface of the oil suction hood 6. By opening the vent hole 61 at this position, it is ensured that the air in the oil suction hood 6 can escape through the vent hole 61 during the first oil filling process of the fuel tank.

[0091] In addition, an air filter installation hole 112 is provided on the top plate 11 of the box body 1 of the present invention, and an air filter adapted to the air filter installation hole 112 is arranged in the air filter installation hole 112.

[0092] A plugging port 113 is provided on the top plate 11 of the box body 1, and a plug adapted to the plugging port 113 is arranged in the plugging port 113. At least one of the plugging ports 113 is arranged directly above the first bottom plate 121 of the box body 1.

[0093] The top plate 11 of the box body 1 is mainly arranged with the air filter of the fuel tank and the plug of the fuel tank. It should be noted that in the present invention, it is preferred that one of the plugs is arranged directly above the lowest point of the bottom plate 12 of the fuel tank, and the other plug is as far away from this plug as possible. In this way, it can be ensured that during the process of changing the oil or filtering the oil liquid through the plug of the fuel tank, the liquid changing oil pipe can better suck out all the impurities in the oil liquid, and the oil liquid replacement is more sufficient.

[0094] Furthermore, a strengthening structure is arranged in the box body 1, and the strengthening structure includes a strengthening plate 7 arranged on the inner wall of the box body 1.

[0095] The strengthening plate 7 can enhance the rigidity of the box body 1. The side plates of the box body 1 are relatively large panels. To improve the overall rigidity of the fuel tank, strengthening plates 7 are added to the third side plate 15, the fourth side plate 16 and the second side plate 14 of the box body 1.

[0096] The present invention also provides a concrete pump truck, which adopts the hydraulic oil tank as described above. The hydraulic oil tank can meet the narrow layout space of the concrete pump truck. At the same time, it can enable the oil fluid to flow in and out of the tank. During the execution of the boom cylinder's extension and retraction, it can preferably separate the air bubbles in the oil fluid, precipitate the impurities at the bottom of the tank, and the oil fluid has a long flow path in the tank, with sufficient interaction of the oil fluid, and the frequency of the oil fluid being recycled is as uniform as possible.

[0097] Specifically, during the boom extension process, the rodless cavity of the hydraulic cylinder is filled with oil, and the rod cavity discharges oil. The oil fluid in the rod cavity of the hydraulic cylinder flows back into the tank, is filtered by the oil fluid filter element placed in the oil return cylinder 4, and the flow direction of the oil fluid is changed by the oil return guide pipe 5 and flows into the oil return chamber. The oil fluid flowing out through the oil outlet 521 impacts the second inclined plate 133 of the first side plate 13 for oil fluid commutation, and then flows out through the guide hole 321 and impacts the vertical plate 132, and the oil fluid is reflected and flows upward, driving the air bubbles in the oil fluid to escape upward.

[0098] When the rodless cavity of the hydraulic cylinder is filled with oil, the oil fluid is sucked in from the oil fluid filter element in the oil suction cover 6. During oil suction, the oil fluid enters the oil suction port 151 from below the inverted oil suction cover 6. The oil suction cover 6 is in an inverted shape, ensuring that when the oil suction port 151 is at a relatively low liquid level in the tank, the oil port will not be exposed to the air and will not suck in air. At the same time, it drives the oil fluid to flow in from the lower part of the oil suction cover 6.

[0099] In the present invention, the oil fluid flows upward through the guiding component and flows in from below the oil suction cover 6. Its up and down flow enables sufficient heat exchange of the oil fluid in the tank, and at the same time can also ensure sufficient exchange of the oil fluid and separation of air bubbles. The drain port 1211 can also ensure that the impurities in the oil fluid can be easily discharged, thereby improving the quality of the oil fluid and the reliability of the hydraulic actuating components.

[0100] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications to the above-mentioned technical content to make equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A hydraulic oil tank, comprising a box body (1) with an inner cavity, wherein a partition plate (2) is arranged in the inner cavity of the box body (1) to respectively form an oil return chamber and an oil suction chamber on both sides of the partition plate (2), and is characterized in that, A guiding component with a guiding hole (321) is further arranged in the inner cavity of the box body (1), and the oil return chamber communicates with the oil suction chamber through the guiding hole (321). The guiding holes (321) are a plurality of elongated holes arranged at intervals; The bottom edge of the partition plate (2) is connected to the bottom plate (12) of the box body (1). The guiding component is a grid plate (3) arranged on one side of the partition plate (2). The grid plate (3) includes a first plate body (31) and a second plate body (32). The first plate body (31) is arranged opposite to the bottom plate (12) of the box body (1) and is formed with a through hole (311) for an oil return component communicating with the oil return chamber to pass through; The second plate body (32) extends from one end of the first plate body (31) to the bottom plate (12) of the box body (1), and the guiding holes (321) are arranged on the second plate body (32); The first plate body (31) gradually inclines downward from the end close to the second plate body (32) to the end far from the second plate body (32); The second plate body (32) inclines downward from top to bottom in a direction away from the first plate body (31); An oil suction port (151) communicating with the oil suction chamber is arranged on the box body (1). An oil suction component located in the oil suction chamber is connected to the oil suction port (151). The oil suction component is an oil suction cover (6) connected to the fourth side plate (16) of the box body (1). The oil liquid channel formed by surrounding the oil suction cover (6) and the bottom plate (12) gradually narrows from the position close to the oil suction port (151) to the position far from the oil suction port (151). The oil suction cover (6) is provided with a vent hole (61).

2. The hydraulic oil tank according to claim 1, characterized in that, An oil return port (111) is opened on the box body (1), and an oil return component communicating with the oil return chamber is connected to the oil return port (111).

3. The hydraulic oil tank according to claim 1, characterized in that, The guiding hole (321) is an elongated hole, and the edge of the elongated hole is wavy; wherein, the wavy shape is formed by connecting a plurality of arc-shaped grooves or a plurality of rectangular grooves.

4. The hydraulic oil tank according to claim 2, wherein A first oil passing port (322) is arranged on the second plate body (32).

5. The hydraulic oil tank according to claim 2, characterized in that The oil return component includes an oil return cylinder (4) connected to the oil return port (111) and located inside the box body (1). A oil return guiding pipe (5) is connected below the oil return cylinder (4). The oil return guiding pipe (5) passes through the through hole (311) and extends into the oil return chamber and can supply oil liquid into the oil return chamber.

6. The hydraulic oil tank according to claim 5, characterized in that, An oil outlet (521) is arranged on the oil return guiding pipe (5). The oil outlet (521) is located in the oil return chamber, and the opening direction of the oil outlet (521) faces away from the second plate body (32).

7. The hydraulic oil tank according to claim 6, characterized in that, The oil return guiding pipe (5) includes a vertical section (51) connected to the oil return cylinder (4) and an inclined section (52) connected to the vertical section (51). The oil outlet (521) is opened at the end of the inclined section (52).

8. The hydraulic oil tank according to claim 7, characterized in that, The oil outlet (521) is an inclined cut opened at the end of the inclined section (52).

9. The hydraulic oil tank according to claim 6, wherein, The oil return guide pipe (5) is cylindrical, and the distance between the oil outlet (521) and the inner wall surface of the box body (1) is greater than 3-4 times the diameter of the oil outlet (521).

10. The hydraulic oil tank according to claim 6, characterized in that, The side wall of the box body (1) opposite to the second plate body (32) is formed into a U-shaped plate with an opening facing the inside of the box body (1). The U-shaped plate includes a vertical plate (132) and first inclined plates (131) and second inclined plates (133) connected to both ends of the vertical plate (132). The first inclined plate (131) is connected to the top plate (11) of the box body (1), and the second inclined plate (133) is connected to the bottom plate (12) of the box body (1).

11. The hydraulic oil tank according to claim 10, characterized in that, The opening direction of the oil outlet (521) is set to face the second inclined plate (133).

12. The hydraulic oil tank according to claim 1, characterized in that, The bottom plate (12) of the box body (1) is stepped and includes a first bottom plate (121), a second bottom plate (122), and a third bottom plate (123) connected between the first bottom plate (121) and the second bottom plate (122). The height where the first bottom plate (121) is located is lower than the height where the second bottom plate (122) is located. The bottom edge of the partition plate (2) is provided on the first bottom plate (121). The first plate body (31) is arranged opposite to the first bottom plate (121), and the bottom end of the second plate body (32) is connected to the first bottom plate (121); or the bottom end of the second plate body (32) is connected to the connection part between the first bottom plate (121) and the third bottom plate (123).

13. The hydraulic oil tank according to claim 12, characterized in that, The first bottom plate (121) is gradually inclined upward from the end close to the third bottom plate (123) to the end far from the third bottom plate (123); and / or, the second bottom plate (122) is gradually inclined upward from the end close to the third bottom plate (123) to the end far from the third bottom plate (123); and / or, the third bottom plate (123) is inclined downward toward the grille plate (3).

14. The hydraulic oil tank according to claim 12, characterized in that, An oil drain port (1211) is provided on the first bottom plate (121).

15. The hydraulic oil tank according to claim 13, characterized in that, A plugging port (113) is provided on the top plate (11) of the box body (1). A plug is provided in the plugging port (113), and at least one of the plugging ports (113) is arranged directly above the first bottom plate (121).

16. The hydraulic oil tank according to claim 1, characterized in that, A second oil passage port (21) communicating the oil return chamber and the oil suction chamber is provided on the part of the partition plate (2) located outside the guiding member.

17. The hydraulic oil tank according to claim 1, characterized in that, An air filter installation hole (112) is provided on the top plate (11) of the box body (1), and an air filter is provided in the air filter installation hole (112).

18. The hydraulic oil tank according to claim 1, characterized in that, A strengthening structure is provided inside the box body (1), and the strengthening structure includes a strengthening plate (7) provided on the inner wall of the box body (1).

19. A pump truck, characterized in that, Adopt the hydraulic oil tank according to any one of claims 1-18.

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