Energy-saving device for engineering machinery

Abstract

The utility model discloses an energy-saving device for engineering machinery, which comprises an energy storage oil cylinder assembly, the energy storage oil cylinder assembly is connected with a main valve and an oil tank, stop valves are respectively connected between the main valve and the energy storage oil cylinder assembly and between the oil tank and the energy storage oil cylinder assembly, the main valve is connected with a stamping valve and a main pump, the energy storage oil cylinder assembly is provided with a safety valve, and the safety valve is connected with the oil tank. An overflow opening in the safety valve is connected with an oil tank through a pipeline, the energy storage oil cylinder assembly comprises a cylinder sleeve, a lower blocking piece is arranged 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 is communicated with the telescopic bag, and a movable column is movably arranged on the upper portion of the cylinder sleeve. The telescopic bag is integrated into the energy storage oil cylinder, the size of equipment is smaller, external pipelines are reduced, the telescopic bag can be compressed to store energy in the downward moving process of the movable arm of the excavator, balance can be broken through smaller force in the working process of a hydraulic system, and more labor is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic excavator movable arm energy recovery technical field especially relates to a kind of energy-saving device for engineering machinery. BACKGROUND

[0002] Hydraulic excavator movable arm releases a large amount of gravitational potential energy in the process of descending, and the traditional technology recovers energy through hydraulic or electrical system, but there are the following technical bottlenecks: the limitation of hydraulic recovery system, the independent setting of accumulator leads to complex structure: the prior scheme (CN 118911230 A) discloses a hydraulic excavator movable arm energy recovery system and control strategy, relating to the technical field of hydraulic excavator movable arm energy recovery, comprising an oil tank, an accumulator and a first energy recovery cylinder, an energy utilization cylinder and a second energy recovery cylinder arranged in turn below the movable arm and connected with the movable arm, the first energy recovery cylinder, the energy utilization cylinder and the second energy recovery cylinder are connected with the oil tank and the accumulator through an oil liquid conveying system, the oil liquid conveying system includes a rod cylinder inlet and outlet oil pipe system, an energy recovery cylinder rodless cylinder inlet oil pipe system, an energy utilization cylinder rodless cylinder inlet oil pipe system, an energy utilization cylinder rodless cylinder return oil pipe system and an energy recovery cylinder rodless cylinder return oil pipe system, usually adopts external accumulator to store energy, needs to additionally configure oil circuit, valve group and safety device, leading to large system volume, high installation and maintenance cost, and significant pipeline pressure loss, many equipment components, installation is troublesome, the present application proposes a kind of energy-saving device for engineering machinery. SUMMARY

[0003] Based on the technical problems existing in the background art, the utility model provides an energy-saving device for engineering machinery.

[0004] The utility model discloses an energy-saving device for engineering machinery, including energy storage oil cylinder assembly, the energy storage oil cylinder assembly is connected with main valve and oil tank, the main valve and oil tank are connected with energy storage oil cylinder assembly all, and all be connected with stop valve between energy storage oil cylinder assembly, the main valve is connected with stamping valve and main pump, be provided with safety valve on the energy storage oil cylinder assembly, and the overflow port on safety valve is connected with oil tank through pipeline.

[0005] As further optimization of the technical scheme, the utility model discloses an energy-saving device for engineering machinery, the energy storage oil cylinder assembly includes cylinder sleeve, the lower baffle is provided at the bottom of the cylinder sleeve, the lower baffle is installed with telescopic bag and one-way inflation valve, the one-way inflation valve and telescopic bag are communicated, the movable column is movably arranged on the upper portion of the cylinder sleeve, the one-way flow interception assembly is arranged between the movable column and the telescopic bag in the cylinder sleeve, and the locking assembly for fixing the telescopic bag is arranged on the lower baffle.

[0006] As a further optimization of the technical solution, the utility model discloses an energy -conserving device for engineering machinery, the cylinder liner is tubular structure, and the cylinder liner bottom is provided with the internal thread part, the lower plug upper part is provided with the cylindrical sealing part who is compatible with the cylinder liner lower part, the outside of cylindrical sealing part is provided with the external thread who is compatible with the cylinder liner bottom internal thread, the cylindrical sealing part is provided with the sealing ring, the lower plug lower part is provided with the first mounting hole, the lower plug is close to the first mounting hole and the cylindrical sealing part between position and is provided with the rectangular hole, the cylindrical sealing part is provided with the circular groove of top opening, the first baffle ring is provided with the first baffle ring to the circular groove away from the rectangular hole one end, the telescopic bag lower part is provided with the annular rubber ring who is compatible with the circular groove top, the telescopic bag lower part is close to the annular rubber ring outside and is coaxially provided with the annular protruding, the cylindrical sealing part top of lower plug is provided with the annular groove who is compatible with the annular protruding, the one -way inflation valve is linked with the circular groove, the inside of circular groove is coaxially provided with the inner tube to the lower part, the inner tube inside lower part is provided with the second baffle ring, the rectangular hole inside upper part is provided with the perforation who is communicated with the inner tube inside, the inner tube is provided with locking assembly, the inner tube inside is close to the second baffle ring and the perforation between position and is provided with the one -way valve block, the one -way valve block lower part is provided with the top rod who is worn out by the perforation, the top rod top is provided with the insertion hole who is passed through the rectangular hole top, the insertion hole is inserted with the guide rod, the guide rod is provided with the third spring to the outside sleeve, the guide rod outer peripheral surface upper position is provided with the piston ring, the piston ring is compatible with the inner tube, the guide rod top is provided with the porous pressure plate, the guide rod outside is close to the one -way valve block and the circular groove bottom and is provided with the second spring to the sleeve, the top rod lower part is provided with the pin hole, and the pin hole is inserted with the fixed pin, the inner tube is close to the first baffle ring bottom position and is provided with the air hole, the inner ring of annular rubber ring is less than the outer diameter of porous pressure plate.

[0007] As a further optimization of the technical solution, the utility model discloses an energy -conserving device for engineering machinery, the cylinder liner top is provided with the slip ring, and the slip ring forms the sliding fit with the movable column outside.

[0008] As a further optimization of the technical solution, the utility model discloses an energy -conserving device for engineering machinery, the cylinder liner inside is close to the telescopic bag upper position and is provided with the annular protruding, the annular protruding is fixed with the inner insertion rod, the inner insertion rod inside is provided with the hollow channel, the inner insertion rod top is provided with the oil -passing hole who is annularly distributed, the outer peripheral surface of inner insertion rod is close to the oil -passing hole lower position and is provided with the piston rubber bushing, the movable column inside is provided with the cylindrical channel, the piston rubber bushing is inserted in the cylindrical channel, the movable column top is provided with the second mounting hole, the cylinder liner and the cylindrical channel are filled with hydraulic oil.

[0009] As a further optimization of this technical solution, this utility model provides an energy-saving device for engineering machinery. The unidirectional interception component includes a metal rod, a limiting ring is provided on the lower inner side of the inner rod, an arc-shaped block is provided at one end of the metal rod, a first spring is provided on the outer circumference of the metal rod near the limiting ring and the arc-shaped block, and a limiting cap is provided at the end of the metal rod away from the arc-shaped block.

[0010] In summary, the beneficial effects of this utility model are as follows:

[0011] This energy-saving system integrates a telescopic bladder into an energy storage cylinder by storing high-pressure gas at an appropriate pressure within the bladder. This results in a smaller device size, reduced external piping, and the ability to store energy by compressing the bladder during the excavator boom's downward movement. When the hydraulic system is operating, less force is needed to break the balance, reducing labor and hydraulic system pressure, thus saving energy. The locking component facilitates easy disassembly and replacement of the bladder, making maintenance convenient and operation simple. The one-way flow-blocking component can block the bladder when it expands to a certain extent, preventing overpressure and ensuring greater safety and reliability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an energy-saving device for engineering machinery proposed in this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the energy storage cylinder assembly proposed in this utility model, showing the removal of the lower plug, telescopic bladder, and locking assembly.

[0014] Figure 3 This is an exploded structural diagram of the lower plug, telescopic bladder, and locking assembly proposed in this utility model;

[0015] Figure 4 This is a cross-sectional structural diagram of the lower plug, telescopic bladder, and locking assembly proposed in this utility model;

[0016] Figure 5 for Figure 4 A partially enlarged structural diagram of part B in the diagram;

[0017] Figure 6 This is a schematic diagram of the internal insertion rod proposed in this utility model;

[0018] Figure 7 for Figure 2 A partially enlarged structural diagram of part A in the diagram;

[0019] Figure 8 This is a schematic diagram of the structure of the hydraulic drive assembly proposed in this utility model;

[0020] Figure 9This is a schematic diagram of the structure of an energy-saving device for engineering machinery proposed in this utility model.

[0021] In the diagram: 1. Cylinder liner; 2. Lower plug; 201. Cylindrical seal; 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. Exhaust hole; 3. One-way inflation valve; 4. Moving column; 401. Second mounting hole; 402. Cylindrical channel; 5. Inner rod; 501. Oil passage hole; 502. Piston sleeve; 5 03. Limiting ring; 6. One-way flow blocking assembly; 601. Metal rod; 602. Arc block; 603. First spring; 604. Limiting cap; 7. Telescopic bladder; 701. Annular protrusion; 702. Annular rubber ring; 8. Locking assembly; 801. One-way valve block; 802. Top 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 Implementation

[0022] The following will refer to the appendix in the embodiments of this utility model. Figures 1-9 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Reference Figures 1-9 An energy-saving device for engineering machinery includes an energy storage cylinder assembly. The energy storage cylinder assembly is connected to a main valve and an oil tank. Both the main valve and the oil tank are connected to a shut-off valve. The main valve is connected to a pressurizing valve and a main pump. The energy storage cylinder assembly is equipped with a safety valve. The overflow port of the safety valve is connected to the oil tank through a pipe.

[0024] The energy storage cylinder assembly includes a cylinder liner 1, a lower plug 2 at the bottom of the cylinder liner 1, a telescopic bladder 7 and a one-way inflation valve 3 installed on the lower plug 2, the one-way inflation valve 3 and the telescopic bladder 7 being connected, a movable column 4 movably disposed on the upper part of the cylinder liner 1, a one-way flow-blocking assembly 6 disposed inside the cylinder liner 1 between the movable column 4 and the telescopic bladder 7, and a locking assembly 8 for fixing the telescopic bladder 7 disposed on the lower plug 2.

[0025] The cylinder liner 1 has a tubular structure and an internal thread at its bottom. The lower plug 2 has a columnar sealing part 201 on its upper part that matches the lower part of the cylinder liner 1. The external part of the columnar sealing part 201 has an external thread that matches the internal thread at the bottom of the cylinder liner 1. A sealing ring 203 is fitted on the columnar sealing part 201. The lower plug 2 has a first mounting hole 202 at its lower part. A rectangular hole 204 is provided on the lower plug 2 near the position between the first mounting hole 202 and the columnar sealing part 201. The columnar sealing part 201 has a top opening. The circular groove 206 has a first retaining ring 2061 at one end away from the rectangular hole 204. The lower part of the telescopic bladder 7 has an annular rubber ring 702 that matches the top of the circular groove 206. An annular protrusion 701 is coaxially arranged on the outer side of the lower part of the telescopic bladder 7 near the annular rubber ring 702. The top of the columnar sealing part 201 of the lower plug 2 has an annular groove that matches the annular protrusion 701. The one-way inflation valve 3 is connected to the circular groove 206. An inner tube 207 is coaxially arranged on the lower inner side of the circular groove 206. A second retaining ring 2071 is provided on the lower inner side. A through hole communicating with the inside of the inner tube 207 is provided on the upper inner side of the rectangular hole 204. A locking assembly 8 is provided inside the inner tube 207. A one-way valve block 801 is provided on the inner side of the inner tube 207 near the position between the second retaining ring 2071 and the through hole. A top rod 802 extending through the through hole is provided on the lower part of the one-way valve block 801. An insertion hole penetrating the top of the rectangular hole 204 is provided on the top of the top rod 802. A guide rod 805 is inserted into the insertion hole. A third spring 804 is sleeved on the outside of the guide rod 805. A piston ring 806 is provided at the upper part of the outer peripheral surface of 805. The piston ring 806 is adapted to the inner tube 207. A perforated pressure plate 807 is provided at the top of the guide rod 805. A second spring 803 is sleeved between the outer side of the push rod 802 and the bottom of the one-way valve block 801 and 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 vent hole 208 is provided at the bottom of the inner tube 207 near the first retaining ring 2061. The inner circle of the annular rubber ring 702 is smaller than the outer diameter of the perforated pressure plate 807.

[0026] The top of the cylinder liner 1 is threaded with a slip ring 9, which forms a sliding fit with the outer side of the movable column 4.

[0027] An annular protrusion is provided on the inner side of the cylinder liner 1 near the upper part of the telescopic bladder 7. An inner rod 5 is fixed inside the annular protrusion. A hollow channel is provided on the inner side of the inner rod 5. An oil passage hole 501 is provided on the top of the inner rod 5 in an annular arrangement. A piston sleeve 502 is provided on the outer circumference of the inner rod 5 near the lower part of the oil passage hole 501. A cylindrical channel 402 is provided on the inner side of the movable column 4. The piston sleeve 502 is inserted into the cylindrical channel 402. A second mounting hole 401 is provided on the top of the movable column 4. Hydraulic oil is contained in the cylinder liner 1 and the cylindrical channel 402.

[0028] The unidirectional flow-blocking assembly 6 includes a metal rod 601. A limit ring 503 is provided on the lower inner side of the inner insertion rod 5. An arc-shaped block 602 is provided at one end of the metal rod 601. A first spring 603 is provided between the limit ring 503 and the arc-shaped block 602 on the outer circumferential surface of the metal rod 601. A limit cap 604 is provided at the end of the metal rod 601 away from the arc-shaped block 602.

[0029] Working principle: In use, two sets of accumulator cylinder assemblies work together with a hydraulic cylinder to form a hydraulic drive assembly, such as... Figure 8During operation, the one-way inflation valve 3 is connected to an external air source, supplying high-pressure gas of appropriate pressure to the telescopic bladder 7. As the telescopic bladder 7 expands, hydraulic oil in the cylinder liner 1 is supplied into the cylindrical channel 402, thereby extending the movable column 4 from the cylinder liner 1. In excavator boom drives, when the pressure of the excavator boom compresses the movable column 4, and with the return hydraulic oil to the cylinder liner 1, the telescopic bladder 7 contracts. If the excavator boom needs to be lifted in this state, only a force less than the excavator boom pressure needs to be applied to the hydraulic cylinder, thus reducing the working pressure of the hydraulic system and saving effort. During the disassembly and assembly of the telescopic bladder 7, the lower plug 2 is separated from the cylinder liner 1, and the fixing pin 8021 is pulled, causing the push rod 802 to pull down, separating the one-way valve block 801 and the second retaining ring 2071, allowing external air intake. This releases the pressure of the perforated pressure plate 807 on the telescopic bladder 7, allowing it to be pulled... The telescopic bladder 7 removes the porous pressure plate 807, guide rod 805, and piston ring 806 together. Since the annular rubber ring 702 has a soft and elastic structure, the porous pressure plate 807 can be pulled out from the annular rubber ring 702. After replacing the telescopic bladder 7, the piston ring 806 is inserted into the inner tube 207. Then, the lower plug 2 is fixed to the cylinder liner 1. During the process of introducing gas through the one-way inflation valve 3, as the pressure of the telescopic bladder 7 increases, it will drive the piston ring 806 to continue to press down along the inner tube 207 for a distance, forcing out the gas between the piston ring 806 and the second retaining ring 2071. With 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 into the inner tube 207.

[0030] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An energy-saving device 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. Both the main valve and the oil tank are connected to a shut-off valve. The main valve is connected to a pressurizing valve and a main pump. The energy storage cylinder assembly is equipped with a safety valve. The overflow port of the safety valve is connected to the oil tank through a pipe.

2. The energy-saving device for engineering machinery according to claim 1, characterized in that, The energy storage cylinder assembly includes a cylinder liner (1), a lower plug (2) is provided at the bottom of the cylinder liner (1), a telescopic bladder (7) and a one-way inflation valve (3) are installed on the lower plug (2), the one-way inflation valve (3) and the telescopic bladder (7) are connected, a movable column (4) is movably provided on the upper part of the cylinder liner (1), a one-way flow blocking assembly (6) is provided inside the cylinder liner (1) between the movable column (4) and the telescopic bladder (7), and a locking assembly (8) for fixing the telescopic bladder (7) is provided on the lower plug (2).

3. The energy-saving device for engineering machinery according to claim 2, characterized in that, The cylinder liner (1) has a tubular structure and an internal thread at the bottom. The lower plug (2) has a columnar sealing part (201) on its upper part that matches the lower part of the cylinder liner (1). The columnar sealing part (201) has an external thread that matches the internal thread at the bottom of the cylinder liner (1). A sealing ring (203) is fitted on the columnar sealing part (201). The lower plug (2) has a first mounting hole (202) at its lower part. A rectangular hole (204) is provided on the lower plug (2) near the position between the first mounting hole (202) and the columnar sealing part (201). The columnar sealing part (201) has a top opening inside. A circular groove (206) is provided at one end away from the rectangular hole (204), and a first retaining ring (2061) is provided at the other end of the circular groove (206). An annular rubber ring (702) is provided at the lower part of the telescopic bladder (7) to match the top of the circular groove (206). An annular protrusion (701) is provided coaxially on the outer side of the lower part of the telescopic bladder (7) near the annular rubber ring (702). An annular groove that matches the annular protrusion (701) is provided at the top of the columnar sealing part (201) of the lower plug (2). The one-way inflation valve (3) is connected to the circular groove (206). An inner tube (207) is provided coaxially on the lower part of the inner side of the circular groove (206). 7) A second retaining ring (2071) is provided on the lower inner side. A through hole is provided on the upper inner side of the rectangular hole (204) to connect to the inside of the inner tube (207). A locking assembly (8) is provided inside the inner tube (207). A one-way valve block (801) is provided on the inner side of the inner tube (207) near the position between the second retaining ring (2071) and the through hole. A top rod (802) is provided on the lower part of the one-way valve block (801) through the through hole. An insertion hole is provided on the top of the top rod (802) to penetrate the top of the rectangular hole (204). A guide rod (805) is inserted into the insertion hole. A third spring (804) is sleeved on the outside of the guide rod (805). A piston ring (806) is provided at the upper part of the outer peripheral surface of the guide rod (805). The piston ring (806) is adapted to the inner tube (207). A multi-hole pressure plate (807) is provided at the top of the guide rod (805). A second spring (803) is sleeved between the outer side of the push rod (802) and the bottom of the one-way valve block (801) and 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 vent (208) is provided at the bottom of the inner tube (207) near the first retaining ring (2061). The inner ring of the annular rubber ring (702) is smaller than the outer diameter of the multi-hole pressure plate (807).

4. The energy-saving device for engineering machinery according to claim 3, characterized in that, The top of the cylinder liner (1) is threaded with a slip ring (9), and the slip ring (9) forms a sliding fit with the outer side of the movable column (4).

5. An energy-saving device for engineering machinery according to claim 4, characterized in that, An annular protrusion is provided on the inner side of the cylinder liner (1) near the upper part of the telescopic bladder (7). An inner rod (5) is fixed inside the annular protrusion. A hollow channel is provided on the inner side of the inner rod (5). An oil passage hole (501) is provided on the top of the inner rod (5) in an annular pattern. A piston sleeve (502) is provided on the outer circumference of the inner rod (5) near the lower part of the oil passage hole (501). A cylindrical channel (402) is provided on the inner side of the movable column (4). The piston sleeve (502) is inserted into the cylindrical channel (402). A second mounting hole (401) is provided on the top of the movable column (4). Hydraulic oil is contained in the cylinder liner (1) and the cylindrical channel (402).

6. An energy-saving device for engineering machinery according to claim 5, characterized in that, The unidirectional flow interception assembly (6) includes a metal rod (601), a limit ring (503) is provided on the lower inner side of the inner insertion rod (5), an arc block (602) is provided at one end of the metal rod (601), a first spring (603) is provided between the limit ring (503) and the arc block (602) on the outer circumference of the metal rod (601), and a limit cap (604) is provided at the end of the metal rod (601) away from the arc block (602).

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