An accumulator with a built-in air passage

Abstract

The utility model provides an accumulator with built-in air passage, including the accumulator cylinder with inner chamber, is equipped with plunger or elastic diaphragm in its inner chamber, the plunger or the elastic diaphragm will the inner chamber is divided into gas chamber and hydraulic chamber, be equipped with the oil hole of being linked with the hydraulic chamber in the accumulator cylinder bottom, be equipped with the air passage from the accumulator cylinder bottom end to the gas chamber in the accumulator cylinder wall, when the accumulator with the breaking hammer cylinder intercommunication, the oil channel in the accumulator cylinder and the oil channel of breaking hammer are conducted, and the air passage and the air passage of breaking hammer are conducted. The utility model can make the accumulator gas chamber and the mutual conduction of the air supplement system in the breaking hammer inside, realized the real -time air supplement function of accumulator, effectively solved the problem that traditional accumulator causes the pressure drop because of gas leakage and influences equipment performance, ensured that the breaking hammer can continuously keep stable gas pressure in the working process, thereby promoted the work efficiency and reliability of equipment.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic breakers, specifically relating to an accumulator with a built-in air channel. Background Technology

[0002] Hydraulic breakers, as a common type of engineering crushing equipment, are widely used in mining, construction, and other fields. Their working principle involves a hydraulic system driving the hammer to perform high-frequency impacts, thereby crushing hard objects. During the operation of a hydraulic breaker, the accumulator, as a key component, is mainly used to absorb pressure pulsations in the hydraulic system, store energy, and replenish instantaneous flow demands, thus improving the equipment's working efficiency and stability.

[0003] However, existing accumulators require pre-filling with external gas cylinders before being put into use to ensure that their internal gas chambers reach the required working pressure. But during actual operation, due to natural gas leakage or pressure fluctuations in the accumulator chambers, the internal gas pressure gradually decreases, and the existing structure cannot replenish gas in real time during operation. This leads to a gradual weakening of the accumulator's buffering and energy storage effects, thus affecting the impact force and operational stability of the hydraulic breaker. Prolonged insufficient pressure not only reduces the equipment's working efficiency but may also increase the load on the hydraulic system and shorten the service life of critical components. Furthermore, frequent shutdowns for gas replenishment not only increase maintenance costs but also affect construction progress and reduce the overall reliability of the equipment. Utility Model Content

[0004] The present invention aims to provide an energy accumulator with a built-in air passage to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide an accumulator with a built-in air passage, suitable for mounting on the cylinder body of a hydraulic breaker, the accumulator including an accumulator cylinder with an inner cavity, a plunger or an elastic diaphragm being provided in the inner cavity, the plunger or the elastic diaphragm dividing the inner cavity into an air chamber and a hydraulic chamber;

[0006] An oil hole connected to the hydraulic chamber is provided at the bottom of the accumulator cylinder, and an air passage is provided on the wall of the accumulator cylinder from the bottom of the accumulator cylinder to the air chamber.

[0007] When the accumulator is connected to the cylinder of the breaker, the oil passage in the accumulator cylinder is connected to the oil passage of the breaker, and the air passage is connected to the air passage of the breaker.

[0008] In this embodiment, by creating an air channel inside the accumulator, the accumulator's air chamber is interconnected with the air replenishment system inside the hydraulic breaker, enabling real-time air replenishment. This effectively solves the problem of pressure drop due to gas leakage affecting equipment performance in traditional accumulators, ensuring that the hydraulic breaker maintains a stable gas pressure during operation, thereby improving the equipment's efficiency and reliability. Simultaneously, the real-time air replenishment mechanism reduces the frequency of manual intervention, lowers maintenance costs, extends the accumulator's service life, and provides strong support for the long-term stable operation of the hydraulic breaker.

[0009] In one embodiment, the inner cavity is a cylindrical cavity, and the plunger is assembled in the cylindrical cavity and can slide up and down along the cylindrical cavity under the drive of hydraulic oil or high-pressure air;

[0010] The bottom of the cylindrical cavity is provided with an inner step for limiting the plunger; the inner step surrounds the oil hole;

[0011] The airway is vertically arranged on one side of the columnar cavity, and the top of the airway is connected to the air chamber.

[0012] The top of the columnar cavity is provided with a removable sealing end cap;

[0013] There is one oil hole, and the diameter of the oil hole is 10-80mm.

[0014] In one embodiment, the plunger sidewall has at least one first annular groove for assembling a plunger sealing ring.

[0015] In this embodiment, by setting a sealing ring on the plunger, the airtightness of the gas chamber can be improved, preventing high-pressure oil from seeping into the gas chamber and affecting the energy storage effect.

[0016] In one embodiment, the oil hole extends outward with an annular boss, and at least one second annular groove is formed on the side wall of the annular boss. The second annular groove is used to assemble the oil port sealing ring.

[0017] In this embodiment of the application, by setting a sealing ring in the oil hole, the sealing performance at the oil passage connection is effectively enhanced, preventing hydraulic oil leakage, ensuring the stable operation of the hydraulic breaker, reducing pressure loss and efficiency decline caused by oil leakage, and extending the service life of the equipment.

[0018] In one embodiment, the accumulator cylinder includes a sealably mountable top cover and a base, the top cover and the base being snapped together to form the inner cavity;

[0019] The elastic diaphragm has a basin-shaped structure and is installed between the upper cover and the base with the opening facing upward. The elastic diaphragm has an outer edge that is suitable for clamping and fixing between the upper cover and the base.

[0020] The air passage is correspondingly opened in the base and the top cover.

[0021] In one embodiment, the bottom of the elastic diaphragm is made of metal, while the rest is made of elastic material;

[0022] The oil holes are multiple and evenly distributed on the bottom of the base, and the diameter of the oil holes is 0.5-5mm.

[0023] In this embodiment, the bottom of the elastic diaphragm is made of metal, which has a strong pressure-bearing capacity. Furthermore, by setting multiple small-diameter oil holes to disperse the oil pressure, the elastic diaphragm can be effectively prevented from being damaged under high pressure, thus extending the service life of the accumulator.

[0024] In one embodiment, the outer edge has a downward protrusion;

[0025] The mounting surface of the base is provided with a positioning groove suitable for fixing the protrusion.

[0026] In this embodiment, the outer edge is engaged in the positioning groove by a protrusion, which can effectively prevent the elastic diaphragm from falling off the accumulator cylinder and ensure the stable operation of the accumulator.

[0027] In one embodiment, a third annular groove is provided on the bottom end face of the accumulator cylinder, the third annular groove being located around the oil hole, and the third annular groove being used to assemble the oil port sealing ring.

[0028] In one embodiment, a fourth annular groove is formed around the air passage at the bottom end of the accumulator cylinder, and the fourth annular groove is used to assemble the air passage sealing ring.

[0029] In this embodiment, by setting an air passage sealing ring, the airtightness of the air chamber is ensured, and the leakage of compressed gas is prevented from affecting the energy storage effect.

[0030] In one embodiment, the bottom sidewall of the accumulator cylinder has an outwardly extending mounting portion, and the mounting portion has mounting holes. The accumulator cylinder is bolted to the hydraulic breaker cylinder. Attached Figure Description

[0031] Figure 1 A schematic diagram of the energy accumulator in state one with built-in air passage provided in an embodiment of this utility model;

[0032] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0033] Figure 3 for Figure 1 A magnified view of part B in the middle;

[0034] Figure 4 A schematic diagram of the energy accumulator in state two with built-in air passage provided for an embodiment of this utility model;

[0035] Figure 5 This is a schematic diagram of the energy storage device according to another embodiment of the present invention.

[0036] Explanation of reference numerals in the attached figures:

[0037] 01-Accumulator cylinder body; 011-Top cover; 012-Base; 013-Air chamber; 014-Hydraulic chamber; 015-End cover; 016-Inner step; 017-Annular boss; 018-Assembly part;

[0038] 02-Elastic diaphragm; 021-Outer edge;

[0039] 03-Airway;

[0040] 04-Oil hole;

[0041] 05 - Airway sealing ring;

[0042] 06-Oil port sealing ring;

[0043] 07-Plunger;

[0044] 08 - Plunger sealing ring. Detailed Implementation

[0045] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0046] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0047] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0049] Hydraulic breakers, as common impact equipment in construction machinery, rely heavily on accumulators for buffering pressure fluctuations and storing energy. Traditional accumulators typically employ a bladder or piston structure, storing energy by compressing internally charged gas when hydraulic system pressure increases and releasing energy when system pressure decreases to maintain system stability. However, existing accumulators require external gas cylinders for charging before operation. During prolonged continuous operation or under extreme conditions, the gas inside the accumulator inevitably leaks slowly through sealing gaps, or the gas volume gradually decreases due to frequent pressure changes. Existing structures cannot provide real-time gas replenishment, easily affecting the pressure stability of the hydraulic system. This not only reduces the efficiency of the breaking operation but also accelerates the wear of hydraulic components, shortening the equipment's lifespan. Furthermore, during construction, operators often struggle to detect insufficient accumulator pressure in a timely manner, frequently requiring work interruptions for manual inspection and replenishment, severely impacting project progress.

[0050] This invention establishes an air passage within the accumulator cylinder, allowing the accumulator's air chamber to directly connect with the built-in air replenishment system of the hydraulic breaker. This enables automatic air replenishment during equipment operation, effectively solving the technical problem of traditional accumulators being unable to replenish air in real time. It allows the accumulator to maintain stable gas pressure during long-term operation, preventing gas leakage from affecting performance, effectively reducing the frequency of manual intervention, and significantly improving the equipment's continuous operation capability. Furthermore, stable accumulator pressure helps reduce the impact of pressure fluctuations on hydraulic components, thereby extending the overall service life of the equipment.

[0051] To solve the above-mentioned technical problems, this utility model provides an energy accumulator with a built-in air passage, please refer to the appendix. Figure 1 To be continued Figure 5The energy accumulator with built-in air passage provided by this utility model will now be described.

[0052] The accumulator with built-in air passage provided by this utility model is suitable for assembly on the cylinder body of a hydraulic breaker. The accumulator includes an accumulator cylinder 01 with an inner cavity. A plunger 07 or an elastic diaphragm 02 is provided in the inner cavity, which divides the inner cavity into an air chamber 013 and a hydraulic chamber 014. An oil hole 04 connected to the hydraulic chamber 014 is opened at the bottom of the accumulator cylinder 01, and an air passage 03 is opened on the wall of the accumulator cylinder 01 from the bottom end of the accumulator cylinder 01 to the air chamber 013. When the accumulator is connected to the hydraulic breaker cylinder, the oil passage in the accumulator cylinder 01 is connected to the oil passage of the hydraulic breaker, and the air passage 03 is connected to the air passage of the hydraulic breaker.

[0053] The accumulator works as follows: When high-pressure oil enters the hydraulic chamber 014 through the oil passage of the breaker, it drives the elastic diaphragm 02 to press against the air chamber 013 or drives the plunger 07 to move towards the air chamber 013, thereby compressing the nitrogen gas in the air chamber 013 for energy storage. When the oil pressure is low, the elastic diaphragm 02 presses down or the plunger 07 moves down to replenish the oil pressure.

[0054] In this embodiment, the accumulator's air duct 03 is connected to the built-in air replenishment device via the hydraulic breaker's oil duct, achieving complete internal integration of the accumulator's air replenishment system and completely eliminating reliance on external air source equipment. The accumulator can obtain a stable air supply through the air replenishment system within the hydraulic breaker, significantly improving the overall integrity and compactness of the equipment while also significantly reducing the complexity of installation and maintenance. By eliminating all exposed air pipes, the potential for loosening and breakage due to vibration and impact, common in traditional structures, is effectively avoided, improving the system's reliability under harsh operating conditions. This solution reduces potential leakage risks, simplifies daily maintenance procedures, and significantly extends the equipment's service life.

[0055] In one embodiment, a fourth annular groove is formed around the air inlet. The fourth annular groove is used to assemble the air passage sealing ring 05 to ensure that the air inlet and the hydraulic breaker air passage can be sealed together.

[0056] In one embodiment, the bottom side wall of the accumulator cylinder 01 is provided with an outwardly extending assembly part 018, and the assembly part 018 is provided with an assembly hole. The accumulator cylinder 01 is assembled to the breaker cylinder by bolts.

[0057] In one embodiment, the accumulator cylinder 01 is a plunger-type accumulator, see [reference]. Figure 5The diagram illustrates the structure of a plunger-type accumulator (type 07). The accumulator has a cylindrical cavity within which the plunger (07) is mounted and can slide up and down under the drive of hydraulic oil or high-pressure air. The bottom of the cylindrical cavity has an inner step (016) for limiting the plunger (07), which surrounds an oil hole (04). When the plunger (07) moves downward under the pressure of the air chamber (013), the inner step (016) limits its movement, preventing it from dislodging from the cavity. An air passage (03) is vertically positioned on one side of the cylindrical cavity, with its top end communicating with the air chamber (013). A removable sealing end cap (015) is located at the top of the cylindrical cavity.

[0058] Optionally, there is one oil hole 04, and the diameter of oil hole 04 is 10-80mm.

[0059] To improve sealing and assembly, at least one first annular groove is provided on the side wall of the plunger 07. The first annular groove is used to assemble the plunger sealing ring 08. This improves the airtightness of the gas chamber 013 and ensures the energy storage effect.

[0060] Accordingly, to better seal the hydraulic oil, an annular boss 017 extends outward from the oil hole 04. At least one second annular groove is formed on the side wall of the annular boss 017, which is used to assemble the oil port sealing ring 06. When assembling the accumulator, the annular boss 017 is suitable for insertion into the oil port of the breaker. The oil port sealing ring 06 can improve the sealing performance at the oil port connection, prevent hydraulic oil leakage, and ensure the stable operation of the hydraulic system.

[0061] In other embodiments, such as Figures 1-4 The structure of a diaphragm accumulator is shown. The accumulator cylinder 01 includes a sealable upper cover 011 and a base 012, which are fastened together to form an inner cavity. An elastic diaphragm 02 has a basin-shaped structure and is fitted into the inner cavity with its opening facing upwards. The opening of the elastic diaphragm 02 has an outer edge 021 suitable for clamping and fixing between the upper cover 011 and the base 012. An air passage 03 is correspondingly opened within the base 012 and the upper cover 011.

[0062] The accumulator adopts a detachable structure, which facilitates the replacement of parts and improves the service life of the overall structure.

[0063] Specifically, the upper cover 011 and the base 012 have through holes for assembly, and the two are detachably fixed together by bolts. At the same time, the accumulator is assembled onto the breaker cylinder body by bolts.

[0064] For the structure of the elastic diaphragm 02, please refer to [link / reference needed]. Figure 2The outer edge 021 of the elastic diaphragm 02 has a downward protrusion. The mounting surface of the base 012 has a positioning groove suitable for fixing the protrusion, preventing the outer edge 021 of the elastic diaphragm 02 from detaching from the accumulator cylinder 01 under high pressure, thus ensuring the normal operation of the accumulator. The bottom of the elastic diaphragm 02 is made of metal, while the rest is made of elastic material. This increases the pressure-bearing capacity of the elastic diaphragm 02 and prevents it from breaking under extreme high pressure. Optionally, the elastic diaphragm 02 can also be entirely made of elastic material.

[0065] To achieve better sealing, a third annular groove is provided on the bottom surface of the base 012. The third annular groove is located around the oil hole 04 and is used to assemble the oil port sealing ring 06 to ensure that the oil hole 04 and the oil passage of the breaker are sealed and connected to prevent oil leakage.

[0066] In the diaphragm accumulator, there are multiple oil holes 04 evenly distributed at the bottom of the base 012, and the diameter of the oil holes 04 is 0.5-5mm. By setting multiple smaller diameter holes, the impact of oil pressure on the elastic diaphragm 02 is mitigated.

[0067] In summary, this utility model provides an air passage on the wall of the accumulator cylinder 01 of the accumulator. When the accumulator is assembled with the breaker, the air passage can be directly connected to the air passage of the breaker. By controlling the air passage, the pressure of the accumulator chamber can be monitored and adjusted.

[0068] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An accumulator with a built-in air passage, suitable for mounting on the cylinder body of a hydraulic breaker, characterized in that, The accumulator includes an accumulator cylinder with an inner cavity, in which a plunger or an elastic diaphragm is provided, the plunger or the elastic diaphragm dividing the inner cavity into an air chamber and a hydraulic chamber; An oil hole connected to the hydraulic chamber is provided at the bottom of the accumulator cylinder, and an air passage is provided on the wall of the accumulator cylinder from the bottom of the accumulator cylinder to the air chamber. When the accumulator is connected to the cylinder of the breaker, the oil passage in the accumulator cylinder is connected to the oil passage of the breaker, and the air passage is connected to the air passage of the breaker.

2. The energy accumulator with built-in air passage as described in claim 1, characterized in that, The inner cavity is a cylindrical cavity, and the plunger is assembled in the cylindrical cavity and can slide up and down along the cylindrical cavity under the drive of hydraulic oil or high-pressure air. The bottom of the cylindrical cavity is provided with an inner step for limiting the plunger; the inner step surrounds the oil hole; The airway is vertically arranged on one side of the columnar cavity, and the top of the airway is connected to the air chamber. The top of the columnar cavity is provided with a removable sealing end cap; There is one oil hole, and the diameter of the oil hole is 10-80mm.

3. The energy accumulator with built-in air passage as described in claim 2, characterized in that, The plunger sidewall has at least one first annular groove, which is used to assemble the plunger sealing ring.

4. The energy accumulator with built-in air passage as described in claim 2, characterized in that, An annular boss extends outward from the oil hole, and at least one second annular groove is provided on the side wall of the annular boss. The second annular groove is used to assemble the oil port sealing ring.

5. The energy accumulator with built-in air passage as described in claim 1, characterized in that, The accumulator cylinder includes a sealable upper cover and a base, which are fastened together to form the inner cavity; The elastic diaphragm has a basin-shaped structure and is installed between the upper cover and the base with the opening facing upward. The elastic diaphragm has an outer edge that is adapted to be clamped and fixed between the upper cover and the base. The air passage is correspondingly opened in the base and the top cover.

6. The energy accumulator with built-in air passage as described in claim 5, characterized in that, The bottom of the elastic diaphragm is made of metal, while the rest is made of elastic material. The oil holes are multiple and evenly distributed on the bottom of the base, and the diameter of the oil holes is 0.5-5mm.

7. The energy accumulator with built-in air passage as described in claim 5, characterized in that, The outer edge has a downward protrusion; The mounting surface of the base is provided with a positioning groove suitable for fixing the protrusion.

8. The energy accumulator with an internal airway as described in claim 5, characterized in that, The accumulator cylinder body has a third annular groove on its bottom end face. The third annular groove is located around the oil hole and is used to assemble the oil port sealing ring.

9. The energy accumulator with built-in air passage as described in claim 1, characterized in that, A fourth annular groove is formed around the air passage at the bottom of the accumulator cylinder, and the fourth annular groove is used to assemble the air passage sealing ring.

10. The energy accumulator with an internal airway as described in claim 1, characterized in that, The accumulator cylinder body has an outwardly extending assembly part on its bottom side wall, and the assembly part has an assembly hole. The accumulator cylinder body is bolted to the breaker cylinder body.

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