Integrated hydraulic pump set for storage equipment

Abstract

The utility model relates to an integrated hydraulic pump set for storage equipment, which comprises a supporting valve plate, an oil cylinder assembly is arranged on the surface of the supporting valve plate, a first oil tank covers the oil cylinder assembly, a second oil tank for conveying liquid into the oil cylinder assembly is further arranged on one side of the surface of the supporting valve plate, and a driving element is arranged on the other side of the surface of the supporting valve plate. A gear pump assembly used for extracting liquid in the first oil tank is arranged in the second oil tank, the driving element penetrates through the surface of the supporting valve plate to be connected to the gear pump assembly, a first flow channel is formed in the supporting valve plate, one end of the first flow channel is connected to the first oil tank, and the other end of the first flow channel is connected to the second oil tank. Liquid in the first oil tank can flow back into the second oil tank through the first flow channel, the supporting valve plate is provided with the upper oil tank and the lower oil tank which are communicated with each other, and the oil storage amount is larger than that of a common hydraulic power unit; no external oil pipe is used for connection, oil leakage points are eradicated, and a pump set is clean and sanitary.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pumps, in particular to an integrated hydraulic pump group for storage equipment. Background Art

[0002] The hydraulic system generally consists of three parts: hydraulic power unit, control unit and actuator. The hydraulic system is an important part of the transporter. Its performance and cost are directly related to the market prospects and promotion of the whole machine. For example, in the logistics industry, transporters are moving towards lightweight and low-priced. Today, the cost and size of the hydraulic power unit have become more critical.

[0003] The application announcement number is CN105883664A, which discloses an integrated hydraulic system. Combined with its specification and drawings, its solution integrates the oil cylinder and the valve plate together, reducing the volume of the entire system and reducing costs. Because the entire system does not have any pipes or joints, hydraulic leakage and pollution are avoided as much as possible, making the hydraulic system more reliable and stable. However, this structure only uses an oil tank fixed on the bottom plate with a small oil storage capacity, so the operation of the oil cylinder is also subject to certain restrictions, which brings inconvenience to use. Summary of the invention

[0004] The utility model mainly aims at the problems existing in the use of hydraulic pump groups, and invents an integrated hydraulic pump group for storage equipment, which highly integrates the gear pump assembly, driving element, one-way valve assembly, pressure flow compensation valve, unloading solenoid valve and cylinder assembly without oil pipes; when the bottom of the lifting piston moves to the position of the lifting limit hole, the hydraulic oil in the piston cylinder body will flow back to the inside of the first oil tank along the lifting limit hole, thereby limiting the stroke of the lifting piston through mechanical structure; for the supporting valve plate, there are two upper and lower oil tanks, and the two oil tanks are connected, so the oil storage capacity is larger than that of ordinary hydraulic power units; the entire integrated hydraulic pump group has no external oil pipe connection, so oil leakage points are eliminated.

[0005] The inventive object of the utility model is achieved through the following technical scheme: an integrated hydraulic pump group for storage equipment, comprising a supporting valve plate, a cylinder assembly is arranged on the surface of the supporting valve plate, a first oil tank is arranged on the outer cover of the oil cylinder assembly, a second oil tank for conveying liquid to the interior of the oil cylinder assembly is also arranged on one side of the surface of the supporting valve plate, a driving element is arranged on the other side, a gear pump assembly for extracting liquid from the interior of the first oil tank is arranged inside the second oil tank, the driving element is connected to the gear pump assembly through the surface of the supporting valve plate, a first flow channel is arranged inside the supporting valve plate, one end of the first flow channel is connected to the first oil tank, and the other end is connected to the second oil tank.

[0006] Preferably, the gear pump assembly includes an oil suction filter, a high-pressure gear pump and a first screw, the high-pressure gear pump is fixed to one side of the supporting valve plate by the first screw, one end of the high-pressure gear pump is externally connected to an oil suction filter, and the other end of the high-pressure gear pump is provided with a gear pump oil outlet, and the gear pump oil outlet is connected to the cylinder assembly.

[0007] Preferably, the driving element is a driving motor, the driving motor is connected to the surface of the supporting valve plate via a second screw, and the rotating shaft of the driving motor passes through the surface of the supporting valve plate and is connected to the high-pressure gear pump.

[0008] Preferably, a second flow channel and a third flow channel are provided between the oil outlet of the gear pump and the cylinder assembly, the second flow channel and the third flow channel can communicate with each other, and a one-way valve assembly is also provided inside the second flow channel to prevent liquid backflow.

[0009] Preferably, the one-way valve assembly includes a first steel ball and a first metal spring, the diameter of the second flow channel is larger than the third flow channel and the oil outlet of the gear pump, one end of the second flow channel is removably provided with a valve plate oil plug, the interior of the third flow channel is slidably provided with a first steel ball, and a first metal spring is provided between the first steel ball and the end of the valve plate oil plug.

[0010] Preferably, the cylinder assembly includes a piston cylinder body, a lifting piston, a silicone sealing ring and a cylinder body base, the piston cylinder body is located inside the first oil tank, one end of the piston cylinder body is connected to a fourth flow channel capable of allowing liquid to flow into the interior, a lifting piston is provided inside the piston cylinder body, a plurality of silicone sealing rings and lifting limit holes are also provided inside the piston cylinder body, and a cylinder body base is provided at the bottom of the piston cylinder body.

[0011] Preferably, the ends of the third and fourth flow channels are connected to a fifth flow channel, and a pressure flow compensation valve for adjusting the liquid flow rate and a unloading solenoid valve for controlling the liquid flow are provided on the side wall of the supporting valve plate, and the pressure flow compensation valve and the unloading solenoid valve are connected to the fifth flow channel.

[0012] Preferably, a sixth flow channel and a seventh flow channel are further provided inside the support valve plate, one end of the sixth flow channel is connected to the fifth flow channel and the other end is connected to the inside of the second oil tank, an overflow regulating plug is also threadedly connected to the inside of the support valve plate, one end of the seventh flow channel is connected to the fifth flow channel, and the other end is connected to the inside of the second oil tank, one end of the seventh flow channel is blocked by the overflow regulating plug, a second steel ball is provided inside the seventh flow channel, and a second metal spring is provided between the second steel ball and the overflow regulating plug.

[0013] Compared with the prior art, the utility model has the following beneficial effects: 1. It highly integrates the gear pump assembly, drive element, one-way valve assembly, pressure flow compensation valve, unloading solenoid valve and cylinder assembly without oil pipes; 2. Whenever the bottom of the lifting piston moves to the position of the lifting limit hole, the hydraulic oil inside the piston cylinder will flow back to the inside of the first oil tank along the lifting limit hole, thereby limiting the stroke of the lifting piston through a mechanical structure, which is energy-saving and reliable; 3. When there is liquid inside the first oil tank, it can flow back to the inside of the second oil tank through the first flow channel. For the supporting valve plate, there are two upper and lower oil tanks, and the two oil tanks are connected, so the oil storage capacity is larger than that of ordinary hydraulic power units; 4. The entire integrated hydraulic pump group has no external oil pipe connection, which eliminates oil leakage points and makes the pump group clean and hygienic. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the utility model;

[0015] Figure 2 It is a three-dimensional diagram of the utility model;

[0016] Figure 3 It is an exploded view of the utility model;

[0017] Figure 4 It is a cross-sectional view of the utility model;

[0018] Figure 5 It is a cross-sectional view of the utility model;

[0019] Figure 6 It is a cross-sectional view of the utility model.

[0020] Markings in the figure: 1. Support valve plate; 11. First flow channel; 12. Second flow channel; 13. Third flow channel; 14. Fourth flow channel; 15. Fifth flow channel; 16. Sixth flow channel; 17. Seventh flow channel; 18. Overflow regulating plug; 19. Second steel ball; 10. Second metal spring; 121. Valve plate oil plug; 2. Cylinder assembly; 21. Piston cylinder body; 22. Lifting piston; 23. Silicone sealing ring; 24. Lifting limit hole; 25. Cylinder base; 3. First oil tank; 4. Second oil tank; 5. Driving element; 51. Second screw; 6. Gear pump assembly; 61. Oil suction filter; 62. High-pressure gear pump; 63. First screw; 621. Gear pump oil outlet; 7. One-way valve assembly; 71. First steel ball; 72. First metal spring; 8. Pressure flow compensation valve; 9. Unloading solenoid valve. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0022] like Figures 1 to 6As shown, an integrated hydraulic pump group for storage equipment includes a support valve plate 1, a surface of the support valve plate 1 is provided with a cylinder assembly 2, an outer cover of the cylinder assembly 2 is provided with a first oil tank 3, specifically, the cylinder assembly 2 includes a piston cylinder body 21, a lifting piston 22, a silicone sealing ring 23 and a cylinder body base 25, the piston cylinder body 21 is located inside the first oil tank 3, one end of the piston cylinder body 21 is connected to a fourth flow channel 14 capable of flowing liquid into the interior thereof, a lifting piston 22 is provided inside the piston cylinder body 21, a plurality of silicone sealing rings 23 and lifting limit holes 24 are also provided inside the piston cylinder body 2 1 is provided with a cylinder base 25 at the bottom. After such arrangement, whenever the external hydraulic oil flows into the interior of the piston cylinder 21 from the fourth flow channel 14, the hydraulic oil will gradually gather at the bottom of the piston cylinder 21 until the liquid pressure lifts up the entire lifting piston 22. During the lifting process of the lifting piston 22, a number of silicone sealing rings 23 are used to prevent the liquid from penetrating to the outside along the lifting piston 22. Whenever the bottom of the lifting piston 22 moves to the position of the lifting limit hole 24, the hydraulic oil inside the piston cylinder 21 will flow back to the interior of the first oil tank 3 along the lifting limit hole 24, thereby limiting the stroke of the lifting piston 22 through a mechanical structure, which is energy-saving and reliable.

[0023] In this embodiment, a second oil tank 4 for transporting liquid to the interior of the cylinder assembly 2 is provided on one side of the surface of the support valve plate 1, and a driving element 5 is provided on the other side. The driving element 5 is a driving motor, and the driving motor is connected to the surface of the support valve plate 1 through a second screw 51. A first flow channel 11 is provided inside the support valve plate 1, and one end of the first flow channel 11 is connected to the first oil tank 3, and the other end is connected to the second oil tank 4. After this arrangement, whenever there is liquid in the first oil tank 3, it can flow back to the interior of the second oil tank 4 through the first flow channel 11. The support valve plate 1 has two upper and lower oil tanks, and the two oil tanks are connected, so it has a larger oil storage capacity than an ordinary hydraulic power unit.

[0024] In this embodiment, a gear pump assembly 6 for extracting liquid from the first oil tank 3 is provided inside the second oil tank 4, and the driving element 5 is connected to the gear pump assembly 6 through the surface of the supporting valve plate 1. Specifically, the gear pump assembly 6 includes an oil suction filter 61, a high-pressure gear pump 62 and a first screw 63. The rotating shaft of the driving motor is connected to the high-pressure gear pump 62 through the surface of the supporting valve plate 1. The high-pressure gear pump 62 is fixed to one side of the supporting valve plate 1 by the first screw 63. One end of the high-pressure gear pump 62 is externally connected to the oil suction filter 61. The high-pressure gear pump 6 2 is provided with a gear pump oil outlet 621, and a second flow channel 12 and a third flow channel 13 are provided between the gear pump oil outlet 621 and the fourth flow channel 14 at one end of the piston cylinder 21, and the second flow channel 12 and the third flow channel 13 can flow with each other, and a one-way valve assembly 7 is also provided inside the second flow channel 12 to prevent liquid backflow, specifically, the one-way valve assembly 7 includes a first steel ball 71 and a first metal spring 72, the diameter of the second flow channel 12 is larger than the third flow channel 13 and the gear pump oil outlet 621, and a valve plate oil plug is detachably provided at one end of the second flow channel 12 121, a first steel ball 71 is slidably disposed inside the third flow channel 13, and a first metal spring 72 is disposed between the first steel ball 71 and the end of the valve plate oil plug 121. After such arrangement, the driving element 5 can drive the high-pressure gear pump 62 to work. During the operation of the high-pressure gear pump 62, the hydraulic oil inside the second oil tank 4 will be pumped upwards. Before the hydraulic oil is pumped up, the oil suction filter 61 will be used for filtering. The hydraulic oil pumped away by the high-pressure gear pump 62 will flow into the second flow channel 12 through the gear pump oil outlet 621. During the process of flowing into the second flow channel 12, the first steel ball 71 is disposed between the first steel ball 71 and the end of the valve plate oil plug 121. The ball 71 will move outward, and the first metal spring 72 will be squeezed and deformed during the movement of the first steel ball 71. At this time, the liquid can still flow normally from the inside of the second flow channel 12 to the inside of the third flow channel 13. However, when the hydraulic oil in the third flow channel 13 flows back to the inside of the second flow channel 12, the first metal spring 72 gives a movement trend, so that the first steel ball 71 blocks the connection between the second flow channel 12 and the gear pump oil outlet 621, thereby achieving the effect of preventing the hydraulic oil from flowing back. Whenever the hydraulic oil in the third flow channel 13 flows to the inside of the fourth flow channel 14, the cylinder assembly 2 will start to work normally.

[0025] In this embodiment, the ends of the third flow channel 13 and the fourth flow channel 14 are connected with a fifth flow channel 15, and a pressure flow compensation valve 8 for adjusting the liquid flow rate and a unloading solenoid valve 9 for controlling the liquid flow are provided on the side wall of the support valve plate 1. The pressure flow compensation valve 8 and the unloading solenoid valve 9 are connected to the fifth flow channel 15. Whenever the cylinder assembly 2 descends and works, the unloading solenoid valve 9 is equivalent to a switch that opens the entire fifth flow channel 15. At this time, the fifth flow channel 15 allows hydraulic oil to pass through. After the unloading solenoid valve 9 removes the blockage of the fifth flow channel 15, the pressure flow compensation valve 8 mainly plays a role in regulating the liquid flow rate; a sixth flow channel 16 and a seventh flow channel 17 are also provided inside the support valve plate 1, one end of the sixth flow channel 16 is connected to the fifth flow channel 15 and the other end is connected to the inside of the second oil tank 4, and an overflow regulating plug 18 is also threadedly connected to the inside of the support valve plate 1, and one end of the seventh flow channel 17 is connected to It is connected to the fifth flow channel 15, and the other end is connected to the interior of the second oil tank 4. One end of the seventh flow channel 17 is blocked by the overflow regulating plug 18. A second steel ball 19 is provided inside the seventh flow channel 17, and a second metal spring 10 is provided between the second steel ball 19 and the overflow regulating plug 18. After this arrangement, the hydraulic oil flowing out of the fourth flow channel 14 will pass through the pressure flow compensation valve 8 and the unloading solenoid valve 9 on the fifth flow channel 15 in sequence until it flows into the interior of the second oil tank 4. At this time, the reflux of the hydraulic oil is completed. Whenever the hydraulic oil pressure in each flow channel inside the entire support valve plate 1 is overloaded, the hydraulic oil will continuously squeeze the second steel ball 19, causing the second metal spring 10 to deform. Since the position of the second steel ball 19 has changed, the hydraulic oil can flow to the interior of the second oil tank 4 through the seventh flow channel 17. Of course, when the entire integrated hydraulic pump group is working normally, the second steel ball 19 blocks the interior of the seventh flow channel 17.

[0026] Working principle and usage of this utility model:

[0027] First, the driving element 5 drives the high-pressure gear pump 62 to work. During the operation of the high-pressure gear pump 62, the hydraulic oil in the second oil tank 4 will be pumped upward. Before the hydraulic oil is pumped up, it will be filtered by the oil suction filter 61. The hydraulic oil pumped away by the high-pressure gear pump 62 will flow into the second flow channel 12 through the gear pump oil outlet 621. During the process of flowing into the second flow channel 12, the first steel ball 71 will move outward. During the movement of the first steel ball 71, the first metal spring 72 will be squeezed and deformed. At this time, the liquid can still flow normally from the inside of the second flow channel 12 to the third flow channel 12. The inside of the flow channel 13, however, when the hydraulic oil of the third flow channel 13 flows back to the inside of the second flow channel 12, the first metal spring 72 will give a movement trend, so that the first steel ball 71 blocks the connection between the second flow channel 12 and the gear pump oil outlet 621, thereby achieving the effect that the hydraulic oil cannot flow back. Whenever the hydraulic oil of the third flow channel 13 flows to the inside of the fourth flow channel 14, the hydraulic oil will gradually flow into the inside of the piston cylinder 21, and the hydraulic oil will gradually gather at the bottom of the piston cylinder 21 until the liquid pressure pushes up the entire lifting piston 22, and the lifting piston 22 is in the lifting process. The plurality of silicone seal rings 23 are used to prevent the liquid from penetrating to the outside along the lifting piston 22. When the bottom of the lifting piston 22 moves to the position of the lifting limit hole 24, the hydraulic oil in the piston cylinder 21 will flow back to the inside of the first oil tank 3 along the lifting limit hole 24, thereby limiting the stroke of the lifting piston 22 through the mechanical structure. Whenever there is liquid in the first oil tank 3, it can flow back to the inside of the second oil tank 4 through the first flow channel 11. For the support valve plate 1, there are two upper and lower oil tanks, which are connected, and then the hydraulic oil flows from the fourth flow channel 14 to the second oil tank 4. The hydraulic oil will flow through the pressure flow compensation valve 8 and the unloading solenoid valve 9 on the fifth flow channel 15 in sequence until it flows into the second oil tank 4. At this time, the hydraulic oil return is completed. Whenever the hydraulic oil pressure in each flow channel inside the entire support valve plate 1 is overloaded, the hydraulic oil will continuously squeeze the second steel ball 19, causing the second metal spring 10 to deform. Since the position of the second steel ball 19 has changed, the hydraulic oil can flow through the seventh flow channel 17 to the inside of the second oil tank 4. Of course, when the entire integrated hydraulic pump unit is working normally, the second steel ball 19 blocks the inside of the seventh flow channel 17.

[0028] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An integrated hydraulic pump unit for storage equipment, comprising a support valve plate (1), characterized in that: The surface of the support valve plate (1) is provided with a cylinder assembly (2), the outer cover of the cylinder assembly (2) is provided with a first oil tank (3), one side of the surface of the support valve plate (1) is also provided with a second oil tank (4) for conveying liquid to the inside of the cylinder assembly (2), and the other side is provided with a driving element (5), the inside of the second oil tank (4) is provided with a gear pump assembly (6) for extracting liquid from the inside of the first oil tank (3), the driving element (5) passes through the surface of the support valve plate (1) and is connected to the gear pump assembly (6), the inside of the support valve plate (1) is provided with a first flow channel (11), one end of the first flow channel (11) is connected to the first oil tank (3), and the other end is connected to the second oil tank (4).

2. The integrated hydraulic pump unit for storage equipment according to claim 1, characterized in that: The gear pump assembly (6) comprises an oil suction filter (61), a high-pressure gear pump (62) and a first screw (63); the high-pressure gear pump (62) is fixed to one side of the supporting valve plate (1) by means of the first screw (63); one end of the high-pressure gear pump (62) is externally connected to the oil suction filter (61); the other end of the high-pressure gear pump (62) is provided with a gear pump oil outlet (621); and the gear pump oil outlet (621) is connected to the oil cylinder assembly (2).

3. The integrated hydraulic pump unit for storage equipment according to claim 2, characterized in that: The driving element (5) is a driving motor, which is connected to the surface of the supporting valve plate (1) via a second screw (51), and the rotating shaft of the driving motor passes through the surface of the supporting valve plate (1) and is connected to the high-pressure gear pump (62).

4. The integrated hydraulic pump unit for storage equipment according to claim 3, characterized in that: A second flow channel (12) and a third flow channel (13) are provided between the gear pump oil outlet (621) and the oil cylinder assembly (2); the second flow channel (12) and the third flow channel (13) are capable of communicating with each other; and a one-way valve assembly (7) is also provided inside the second flow channel (12) to prevent liquid backflow.

5. The integrated hydraulic pump unit for storage equipment according to claim 4, characterized in that: The one-way valve assembly (7) comprises a first steel ball (71) and a first metal spring (72); the diameter of the second flow channel (12) is larger than the third flow channel (13) and the gear pump oil outlet (621); a valve plate oil plug (121) is detachably provided at one end of the second flow channel (12); a first steel ball (71) is slidably provided inside the third flow channel (13); and a first metal spring (72) is provided between the first steel ball (71) and the end of the valve plate oil plug (121).

6. The integrated hydraulic pump unit for storage equipment according to claim 5, characterized in that: The oil cylinder assembly (2) comprises a piston cylinder body (21), a lifting piston (22), a silicone seal ring (23) and a cylinder body base (25); the piston cylinder body (21) is located inside the first oil tank (3); one end of the piston cylinder body (21) is connected to a fourth flow channel (14) capable of flowing liquid into the interior thereof; a lifting piston (22) is provided inside the piston cylinder body (21); a plurality of silicone seal rings (23) and lifting limit holes (24) are also provided inside the piston cylinder body (21); and a cylinder body base (25) is provided at the bottom of the piston cylinder body (21).

7. The integrated hydraulic pump unit for storage equipment according to claim 6, characterized in that: The ends of the third flow channel (13) and the fourth flow channel (14) are connected to a fifth flow channel (15); a pressure flow compensation valve (8) for adjusting the flow rate of the liquid and a relief solenoid valve (9) for controlling the flow of the liquid are provided on the side wall of the support valve plate (1); the pressure flow compensation valve (8) and the relief solenoid valve (9) are connected to the fifth flow channel (15).

8. The integrated hydraulic pump unit for storage equipment according to claim 7, characterized in that: A sixth flow channel (16) and a seventh flow channel (17) are also provided inside the support valve plate (1); one end of the sixth flow channel (16) is connected to the fifth flow channel (15) and the other end is connected to the inside of the second oil tank (4); an overflow regulating plug (18) is also threadedly connected to the inside of the support valve plate (1); one end of the seventh flow channel (17) is connected to the fifth flow channel (15) and the other end is connected to the inside of the second oil tank (4); one end of the seventh flow channel (17) is blocked by the overflow regulating plug (18); a second steel ball (19) is provided inside the seventh flow channel (17); and a second metal spring (10) is provided between the second steel ball (19) and the overflow regulating plug (18).

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