An energy-saving system for construction machinery

Abstract

The present invention discloses an energy-saving system for engineering machinery, including an energy storage cylinder assembly, wherein the energy storage cylinder assembly is connected to a main valve and a fuel tank, wherein a stop valve is connected between the main valve, the fuel tank and the energy storage cylinder assembly, wherein the main valve is connected to a stamping valve and a main pump, wherein a safety valve is arranged on the energy storage cylinder assembly, wherein an overflow port on the safety valve is connected to the fuel tank through a pipeline, wherein the energy storage cylinder assembly includes a cylinder sleeve, wherein a lower plugging piece is arranged at the bottom of the cylinder sleeve, wherein a telescopic bag and a one-way air-charging valve are installed on the lower plugging piece, wherein the one-way air-charging valve and the telescopic bag are connected, and wherein a movable column is movably arranged on the upper part of the cylinder sleeve. The present invention integrates the telescopic bag into the energy storage cylinder, wherein the equipment is smaller in size, and the external pipeline is reduced, wherein the telescopic bag can be compressed to store energy during the downward movement of the excavator boom, and wherein the balance can be broken by a smaller force during the operation of the hydraulic system, thereby saving more labor.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic excavator boom energy recovery, and in particular to an energy-saving system for engineering machinery. Background Art

[0002] The boom of a hydraulic excavator releases a large amount of gravitational potential energy during the descent process. Traditional technologies recover energy through hydraulic or electrical systems, but there are the following technical bottlenecks: limitations of the hydraulic recovery system, independent setting of the accumulator leads to complex structure: existing solutions (CN 118911230 A) Disclosed is a hydraulic excavator boom energy recovery system and control strategy, which relates to the technical field of hydraulic excavator boom energy recovery, comprising an oil tank, an accumulator, and a first energy recovery cylinder, an energy utilization cylinder, and a second energy recovery cylinder which are sequentially arranged under the boom and connected to the boom, wherein the first energy recovery cylinder, the energy utilization cylinder, and the second energy recovery cylinder are connected to the oil tank and the accumulator through an oil delivery system, wherein the oil delivery system comprises an oil inlet and outlet pipe system of a rod cylinder, an oil inlet pipe system of a rodless cylinder of an energy recovery cylinder, an oil inlet pipe system of a rodless cylinder of an energy utilization cylinder, an oil return pipe system of a rodless cylinder of an energy utilization cylinder, and an oil return pipe system of a rodless cylinder of an energy recovery cylinder. An external accumulator is usually used to store energy, and an oil circuit, a valve group, and a safety device need to be additionally configured, resulting in a large system volume, high installation and maintenance costs, significant pipeline pressure loss, many equipment components, and troublesome installation. An energy-saving system for construction machinery is now proposed. Summary of the invention

[0003] Based on the technical problems existing in the background technology, the present invention proposes an energy-saving system for engineering machinery.

[0004] The present invention proposes an energy-saving system for engineering machinery, comprising an energy storage cylinder assembly, wherein the energy storage cylinder assembly is connected to a main valve and an oil tank, a shut-off valve is connected between the main valve, the oil tank and the energy storage cylinder assembly, the main valve is connected to a stamping valve and a main pump, a safety valve is arranged on the energy storage cylinder assembly, and an overflow port on the safety valve is connected to the oil tank through a pipeline.

[0005] As a further optimization of the technical solution, the present invention provides an energy-saving system for engineering machinery, wherein the energy storage cylinder assembly includes a cylinder sleeve, a lower blocking piece is provided at the bottom of the cylinder sleeve, a telescopic bag and a one-way inflation valve are installed on the lower blocking piece, the one-way inflation valve and the telescopic bag are communicated, a movable column is movably provided on the upper part of the cylinder sleeve, a one-way shut-off assembly is provided inside the cylinder sleeve between the movable column and the telescopic bag, and a locking assembly for fixing the telescopic bag is provided on the lower blocking piece.

[0006] As a further optimization of the technical solution, the present invention provides an energy-saving system for engineering machinery, the cylinder sleeve is a tubular structure, and an internal threaded portion is provided at the bottom of the cylinder sleeve, a columnar sealing portion matched with the lower portion of the cylinder sleeve is provided at the upper portion of the lower plugging piece, an external thread matched with the internal thread at the bottom of the cylinder sleeve is provided on the outside of the columnar sealing portion, a sealing ring is sleeved on the columnar sealing portion, a first mounting hole is provided at the lower portion of the lower plugging piece, a rectangular hole is provided at a position between the lower plugging piece close to the first mounting hole and the columnar sealing portion, a circular groove with a top opening is provided in the columnar sealing portion, a first retaining ring is provided at one end of the circular groove away from the rectangular hole, an annular rubber ring matched with the top of the circular groove is provided at the lower portion of the telescopic bag, an annular protrusion is coaxially provided near the outer side of the annular rubber ring at the lower portion of the telescopic bag, an annular groove matched with the annular protrusion is provided at the top of the columnar sealing portion of the lower plugging piece, and the one-way inflation valve is connected to the circular groove The cam is provided with a second retaining ring on the inner side of the inner tube, and a through hole is provided on the inner side of the rectangular hole. A locking assembly is provided in the inner tube, and a one-way valve block is provided at a position between the inner side of the inner tube and the second retaining ring and the through hole. A push rod passing through the through hole is provided at the lower part of the one-way valve block, and a plug hole penetrating through the top of the rectangular hole is provided at the top of the push rod. A guide rod is inserted in the plug hole, and a third spring is sleeved on the outer side of the guide rod. A piston ring is provided at the upper position of the outer circumference of the guide rod, and the piston ring is matched with the inner tube. A multi-porous pressure plate is provided on the top of the guide rod, and a second spring is sleeved between the outer side of the push rod and the bottom of the circular groove. A pin hole is provided at the lower part of the push rod, and a fixing pin is inserted in the pin hole. An air hole is provided at a position of the inner tube near the bottom of the first retaining ring, and the inner ring of the annular rubber ring is smaller than the outer diameter of the multi-porous pressure plate.

[0007] As a further optimization of the technical solution, the present invention provides an energy-saving system for engineering machinery, wherein the top of the cylinder sleeve is threadedly connected with a slip ring, and the slip ring forms a sliding fit with the outer side of the movable column.

[0008] As a further optimization of the technical solution, the present invention provides an energy-saving system for engineering machinery, wherein an annular protrusion is provided on the inner side of the cylinder sleeve near the upper position of the telescopic bag, an inner rod is fixed in the annular protrusion, a hollow channel is provided on the inner side of the inner rod, oil holes distributed in an annular manner are provided on the top of the inner rod, a piston rubber sleeve is provided on the outer circumferential surface of the inner rod near the lower position of the oil holes, a cylindrical channel is provided on the inner side of the movable column, the piston rubber sleeve is inserted in the cylindrical channel, a second mounting hole is provided on the top of the movable column, and hydraulic oil is contained in the cylinder sleeve and the cylindrical channel.

[0009] As a further optimization of the technical solution, the present invention provides an energy-saving system for engineering machinery, wherein the one-way shut-off assembly includes a metal rod, a limiting ring is arranged at the lower inner part of the inner inserted rod, an arc block is arranged at one end of the metal rod, a first spring is arranged on the outer peripheral surface of the metal rod near the limiting ring and the arc block, and a limiting cap is arranged at one end of the metal rod away from the arc block.

[0010] In summary, the beneficial effects of the present invention are: The energy-saving system of the present invention stores high-pressure gas of appropriate pressure in the telescopic bag, and integrates the telescopic bag into the energy storage cylinder. The equipment is smaller in size and reduces external pipelines. The telescopic bag can be compressed to store energy during the downward movement of the excavator boom. When the hydraulic system is working, the balance can be broken with less force, which is more labor-saving, reduces the pressure of the hydraulic system, and saves more energy. The locking component is convenient for disassembly, assembly and replacement of the telescopic bag, and maintenance is convenient and simple to operate. The one-way interception component can block the telescopic bag when it expands to a certain extent to avoid over-pressure of the telescopic bag, which is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural schematic diagram of an energy-saving system for engineering machinery proposed by the present invention; Figure 2 A schematic diagram of the structure of the energy storage cylinder assembly proposed in the present invention after removing the lower blocking member, the telescopic bag and the locking assembly; Figure 3 This is a schematic diagram of the explosion structure of the lower blocking member, the telescopic bag and the locking assembly proposed by the present invention; Figure 4 It is a cross-sectional structural schematic diagram of the lower blocking member, the telescopic bag and the locking assembly proposed in the present invention; Figure 5 for Figure 4 A schematic diagram of the local enlarged structure of part B in FIG. Figure 6 This is a schematic diagram of the structure of the inner insertion rod proposed by the present invention; Figure 7 for Figure 2 A local enlarged structural schematic diagram of part A in FIG. Figure 8 This is a schematic diagram of the structure of the hydraulic drive assembly proposed by the present invention; Fig. 9 This is a schematic structural diagram of an energy-saving system for engineering machinery proposed by the present invention.

[0012] In the figure: 1, cylinder sleeve; 2, lower plug; 201, columnar sealing part; 202, first mounting hole; 203, sealing ring; 204, rectangular hole; 206, circular groove; 2061, first retaining ring; 207, inner tube; 2071, second retaining ring; 208, air hole; 3, one-way inflation valve; 4, movable column; 401, second mounting hole; 402, cylindrical channel; 5, inner rod; 501, oil hole; 502, piston rubber sleeve; 5 03. Limiting ring; 6. One-way shutoff assembly; 601. Metal rod; 602. Arc block; 603. First spring; 604. Limiting cap; 7. Telescopic bag; 701. Annular protrusion; 702. Annular rubber ring; 8. Locking assembly; 801. One-way valve block; 802. Push rod; 8021. Fixing pin; 803. Second spring; 804. Third spring; 805. Guide rod; 806. Piston ring; 807. Multi-hole pressure plate; 9. Slip ring. DETAILED DESCRIPTION

[0013] The following will be combined with the attached embodiment of the present invention Figure 1-Figure 9 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] Reference Figure 1-9 An energy-saving system for engineering machinery includes an energy storage cylinder assembly, the energy storage cylinder assembly is connected to a main valve and a fuel tank, a shut-off valve is connected between the main valve, the fuel tank and the energy storage cylinder assembly, the main valve is connected to a stamping valve and a main pump, a safety valve is provided on the energy storage cylinder assembly, and an overflow port on the safety valve is connected to the fuel tank through a pipeline.

[0015] The energy storage cylinder assembly includes a cylinder sleeve 1, a lower blocking piece 2 is provided at the bottom of the cylinder sleeve 1, a telescopic bag 7 and a one-way inflation valve 3 are installed on the lower blocking piece 2, the one-way inflation valve 3 and the telescopic bag 7 are connected, a movable column 4 is movably provided on the upper part of the cylinder sleeve 1, a one-way shut-off assembly 6 is provided inside the cylinder sleeve 1 between the movable column 4 and the telescopic bag 7, and a locking assembly 8 for fixing the telescopic bag 7 is provided on the lower blocking piece 2.

[0016] The cylinder sleeve 1 is a tubular structure, and an internal thread portion is provided at the bottom of the cylinder sleeve 1. A columnar sealing portion 201 adapted to the lower portion of the cylinder sleeve 1 is provided at the upper portion of the lower plugging member 2. An external thread adapted to the internal thread at the bottom of the cylinder sleeve 1 is provided on the outer portion of the columnar sealing portion 201. A sealing ring 203 is sleeved on the columnar sealing portion 201. A first mounting hole 202 is provided at the lower portion of the lower plugging member 2. A rectangular hole 204 is provided at a position between the lower plugging member 2 and the first mounting hole 202 and the columnar sealing portion 201. A top opening is provided in the columnar sealing portion 201. The circular groove 206 is provided with a first retaining ring 2061 at one end of the circular groove 206 away from the rectangular hole 204, the lower part of the telescopic bag 7 is provided with an annular rubber ring 702 adapted to the top of the circular groove 206, the lower part of the telescopic bag 7 is coaxially provided with an annular protrusion 701 near the outer side of the annular rubber ring 702, the top of the columnar sealing portion 201 of the lower blocking member 2 is provided with an annular groove adapted to the annular protrusion 701, the one-way inflation valve 3 is connected to the circular groove 206, the inner lower part of the circular groove 206 is coaxially provided with an inner tube 207, and the inner tube 207 A second retaining ring 2071 is provided at the lower inner part, a through hole communicating with the inner part of the inner tube 207 is provided at the upper inner part of the rectangular hole 204, a locking assembly 8 is provided in the inner tube 207, a one-way valve block 801 is provided at the inner side of the inner tube 207 between the second retaining ring 2071 and the through hole, a push rod 802 is provided at the lower part of the one-way valve block 801, a plug hole penetrating through the top of the rectangular hole 204 is provided at the top of the push rod 802, a guide rod 805 is inserted in the plug hole, a third spring 804 is sleeved on the outer side of the guide rod 805, and the guide rod A piston ring 806 is provided at the upper position of the outer circumference of 805, and the piston ring 806 is adapted to the inner tube 207. A porous pressure plate 807 is provided on the top of the guide rod 805. A second spring 803 is sleeved between the outer side of the push rod 802 near the one-way valve block 801 and the bottom of the circular groove 206. A pin hole is provided at the lower part of the push rod 802, and a fixing pin 8021 is inserted into the pin hole. An air hole 208 is provided at the bottom position of the inner tube 207 near the first retaining ring 2061, and the inner ring of the annular rubber ring 702 is smaller than the outer diameter of the porous pressure plate 807.

[0017] The top of the cylinder sleeve 1 is threadedly connected with a slip ring 9 , and the slip ring 9 forms a sliding fit with the outer side of the movable column 4 .

[0018] An annular protrusion is provided on the inner side of the cylinder sleeve 1 near the upper position of the telescopic bag 7, and an inner rod 5 is fixed in the annular protrusion. A hollow channel is provided on the inner side of the inner rod 5, and oil holes 501 distributed in an annular manner are provided on the top of the inner rod 5. A piston rubber sleeve 502 is provided on the outer peripheral surface of the inner rod 5 near the lower position of the oil holes 501. A cylindrical channel 402 is provided on the inner side of the movable column 4, and the piston rubber sleeve 502 is inserted in the cylindrical channel 402. A second mounting hole 401 is provided on the top of the movable column 4, and hydraulic oil is contained in the cylinder sleeve 1 and the cylindrical channel 402.

[0019] The one-way shut-off assembly 6 includes a metal rod 601, a limiting ring 503 is arranged at the lower inner part of the inner insert rod 5, an arc block 602 is arranged at one end of the metal rod 601, a first spring 603 is arranged between the outer peripheral surface of the metal rod 601 close to the limiting ring 503 and the arc block 602, and a limiting cap 604 is arranged at one end of the metal rod 601 away from the arc block 602.

[0020] Working principle: When in use, two sets of energy storage cylinder components cooperate with a hydraulic cylinder to form a hydraulic drive component, such as Figure 8During the operation, the one-way inflation valve 3 is connected to the external air source, and high-pressure gas of appropriate pressure is supplied to the telescopic bag 7. As the telescopic bag 7 expands and becomes larger, the hydraulic oil in the cylinder sleeve 1 is supplied to the cylindrical channel 402, so that the movable column 4 is extended from the cylinder sleeve 1 and applied to the excavator boom drive. When the pressure of the excavator boom can compress the movable column 4, and cooperate with the hydraulic oil flowing back into the cylinder sleeve 1, the telescopic bag 7 is contracted. If you want to lift the excavator boom in this state, you only need to control the hydraulic cylinder to provide a force less than the pressure of the excavator boom, so the working pressure of the hydraulic system is reduced, which is more labor-saving. During the disassembly and assembly process of the telescopic bag 7, the lower plugging piece 2 and the cylinder sleeve 1 are separated, and the fixing pin 8021 is pulled to drive the push rod 802 to pull down, so that the one-way valve block 801 and the second retaining ring 2071 are separated, and the outside air is taken in, so that the compacting effect of the porous pressure plate 807 on the telescopic bag 7 can be released, so that the telescopic bag 7 can be pulled. The bellows 7 takes out the porous pressure plate 807, the guide rod 805 and the piston ring 806 together. Since the annular rubber ring 702 is a soft and elastic structure, the porous pressure plate 807 can be pulled out from the annular rubber ring 702, and a new bellows 7 is replaced. Then the piston ring 806 is inserted into the inner tube 207, and then the lower plugging piece 2 is fixed to the cylinder sleeve 1. Then, during the process of introducing gas through the one-way inflation valve 3, as the pressure of the bellows 7 increases, the piston ring 806 will be driven to continue to be pressed down along the inner tube 207 by one end, and the gas between the piston ring 806 and the second retaining ring 2071 will be pressed out. Under the action of the one-way valve block 801 and the second spring 803, the gas can be restricted from entering the inner tube 207, thereby restricting the piston ring 806 from moving back. In actual use, a stop block can be installed in the rectangular hole 204 to press the push rod 802 tightly, thereby restricting the gas from passing through the second retaining ring 2071 and entering the inner tube 207.

[0021] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An energy-saving system for engineering machinery, comprising an energy storage cylinder assembly, characterized in that: The energy storage cylinder assembly is connected to a main valve and an oil tank, and a shut-off valve is connected between the main valve, the oil tank and the energy storage cylinder assembly. The main valve is connected to a stamping valve and a main pump. A safety valve is provided on the energy storage cylinder assembly, and an overflow port on the safety valve is connected to the oil tank through a pipeline.

2. The energy-saving system for construction machinery according to claim 1, characterized in that: The energy storage cylinder assembly comprises a cylinder sleeve (1), characterized in that a lower blocking member (2) is arranged at the bottom of the cylinder sleeve (1), a telescopic bag (7) and a one-way inflation valve (3) are installed on the lower blocking member (2), the one-way inflation valve (3) and the telescopic bag (7) are communicated, a movable column (4) is movably arranged on the upper part of the cylinder sleeve (1), a one-way flow cutoff assembly (6) is arranged inside the cylinder sleeve (1) between the movable column (4) and the telescopic bag (7), and a locking assembly (8) for fixing the telescopic bag (7) is arranged on the lower blocking member (2).

3. The energy-saving system for construction machinery according to claim 2, characterized in that: The cylinder sleeve (1) is a tubular structure, and an internal thread portion is provided at the bottom of the cylinder sleeve (1); a columnar sealing portion (201) adapted to the bottom of the cylinder sleeve (1) is provided at the top of the lower plugging member (2); an external thread adapted to the internal thread at the bottom of the cylinder sleeve (1) is provided on the outside of the columnar sealing portion (201); a sealing ring (203) is sleeved on the columnar sealing portion (201); a first mounting hole (202) is provided at the bottom of the lower plugging member (2); a rectangular hole (204) is provided at a position between the lower plugging member (2) and the first mounting hole (202) and the columnar sealing portion (201); and a top opening is provided inside the columnar sealing portion (201). A circular groove (206), a first retaining ring (2061) is provided at one end of the circular groove (206) away from the rectangular hole (204), an annular rubber ring (702) matching the top of the circular groove (206) is provided at the lower part of the telescopic bag (7), an annular protrusion (701) is coaxially provided on the outer side of the lower part of the telescopic bag (7) close to the annular rubber ring (702), an annular groove matching the annular protrusion (701) is provided at the top of the columnar sealing portion (201) of the lower blocking member (2), the one-way inflation valve (3) is connected to the circular groove (206), an inner tube (207) is coaxially provided at the inner lower part of the circular groove (206), and the inner tube (207) is provided 7) A second retaining ring (2071) is provided at the lower inner part, a through hole communicating with the inner part of the inner tube (207) is provided at the upper inner part of the rectangular hole (204), a locking assembly (8) is provided in the inner tube (207), a one-way valve block (801) is provided at a position between the second retaining ring (2071) and the through hole on the inner side of the inner tube (207), a push rod (802) extending through the through hole is provided at the lower part of the one-way valve block (801), a plug hole penetrating through the top of the rectangular hole (204) is provided at the top of the push rod (802), a guide rod (805) is inserted in the plug hole, a third spring (804) is sleeved on the outer side of the guide rod (805), and the guide rod (805) is provided with a third spring (804). A piston ring (806) is provided at an upper position of the outer circumference of the guide rod (805), the piston ring (806) being matched with the inner tube (207), a multi-hole pressure plate (807) being provided at the top of the guide rod (805), a second spring (803) being sleeved between the outer side of the push rod (802) close to the one-way valve block (801) and the bottom of the circular groove (206), a pin hole being provided at the lower part of the push rod (802), and a fixing pin (8021) being inserted into the pin hole, an air hole (208) being provided at a position close to the bottom of the first retaining ring (2061) of the inner tube (207), and the inner ring of the annular rubber ring (702) being smaller than the outer diameter of the multi-hole pressure plate (807).

4. The energy-saving system for construction machinery according to claim 3, characterized in that: A slip ring (9) is threadedly connected to the top of the cylinder sleeve (1), and the slip ring (9) forms a sliding fit with the outer side of the movable column (4).

5. The energy-saving system for construction machinery according to claim 4, characterized in that: An annular protrusion is provided on the inner side of the cylinder sleeve (1) near the upper part of the telescopic bag (7), an inner rod (5) is fixed in the annular protrusion, a hollow channel is provided on the inner side of the inner rod (5), oil holes (501) distributed in an annular pattern are provided on the top of the inner rod (5), a piston rubber sleeve (502) is provided on the outer peripheral surface of the inner rod (5) near the lower part of the oil holes (501), a cylindrical channel (402) is provided on the inner side of the movable column (4), the piston rubber sleeve (502) is inserted in the cylindrical channel (402), a second mounting hole (401) is provided on the top of the movable column (4), and hydraulic oil is contained in the cylinder sleeve (1) and the cylindrical channel (402).

6. The energy-saving system for construction machinery according to claim 5, characterized in that: The one-way shutoff assembly (6) comprises a metal rod (601), a limiting ring (503) is arranged at the lower inner part of the inner insertion rod (5), an arc block (602) is arranged at one end of the metal rod (601), a first spring (603) is arranged between the outer peripheral surface of the metal rod (601) close to the limiting ring (503) and the arc block (602), and a limiting cap (604) is arranged at one end of the metal rod (601) away from the arc block (602).

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