A detachable energy accumulator

Abstract

The utility model discloses a detachable energy accumulator, aims at solving traditional welding fixed energy accumulator dismounting difficult, maintenance cost high and the security hidden danger of welding defect leads to etc. problem. The energy accumulator includes upper cover, lower cover and vibration plate, and vibration plate divides internal space into pressure chamber and hydraulic oil chamber, and upper cover is equipped with the gas filling and discharging mouth, and lower cover is equipped with the hydraulic oil hole. Through the thread cooperation of upper cover convex edge, lower cover outer thread and outer nut, detachable connection is realized, and outer nut inner convex edge presses tightly upper cover convex edge, and the sealing and fastening are ensured. The vibration plate edge is equipped with the positioning sealing ring embedding lower cover positioning groove, and the center bottom is equipped with the reinforcing portion and nylon protection piece, and the durability is enhanced. The outer nut side surface is equipped with the positioning bolt, prevents loosening. The design is convenient for dismounting maintenance, can be used repeatedly, prolongs the life, improves the security and reliability, is applicable to hydraulic system energy storage and pressure stabilization.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a detachable energy storage device. Background Technology

[0002] An accumulator is an energy storage device widely used in hydraulic systems. It is primarily used to absorb pulsating pressure within the system, store energy for sudden demands, or serve as an auxiliary power source. Traditional accumulator structures typically use upper and lower covers fixed together by welding. For example, in welded diaphragm accumulators, the shell is sealed and connected through welding. This design ensures a certain degree of structural compactness and initial sealing, but it also has significant drawbacks.

[0003] First, the welding method makes disassembly and replacement of accumulators extremely inconvenient. If internal components such as the diaphragm, piston, or seals malfunction and require repair, the casing must be opened by cutting or destructive disassembly. This not only increases operational difficulty but may also cause permanent damage to the casing, rendering it unusable. Second, the welding process itself may introduce manufacturing defects, such as weak welds, fatigue cracks, or insufficient strength. According to existing technology, as described in utility model CN200985917Y, existing spherical accumulators suffer from fatigue cracking of welds, leading to easy breakage or leakage during use. Furthermore, welding may reduce the overall lifespan of the product because the metal strength in welded areas is often weaker than in non-welded areas, making them more susceptible to explosion or failure under high-pressure environments. For example, welding problems mentioned in the analysis of piston accumulator explosion causes can lead to safety accidents. In addition, relevant regulations explicitly stipulate that, except for specific types, accumulator casings may not be repaired by welding, further highlighting the limitations of welding methods.

[0004] These drawbacks not only increase maintenance costs but also affect the reliability and safety of the accumulator, especially in industrial applications, potentially leading to system downtime or other safety hazards. Therefore, it is necessary to provide a novel detachable accumulator structure to address the problems associated with traditional welding-based fixing methods. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a detachable energy storage device. By adopting a detachable connection method instead of welding fixation, it enables convenient disassembly and replacement, while improving the durability and safety of the structure.

[0006] To achieve the above objectives, this application discloses a detachable accumulator, including an upper cover and a lower cover. The upper cover includes an air inlet / outlet. A vibrating plate is disposed between the upper and lower covers, inside the lower cover, and divides the interior of the upper and lower covers into a pressure chamber and a hydraulic oil chamber. The bottom of the lower cover has a hydraulic oil hole communicating with the hydraulic oil chamber. The lower edge of the upper cover extends outward to form an upper cover flange. The outer edge of the lower cover body has an external thread and an outer nut. The upper part of the outer nut has an inner flange, and the inner side of the outer nut has an inner thread that mates with the external thread of the lower cover. After the inner thread of the outer nut mates with the external thread of the lower cover, the inner flange presses the upper cover flange together, making the upper and lower covers fit tightly together.

[0007] Furthermore, the positions of the air filling / draining hole and the hydraulic oil hole are provided with internal threads and / or external threads.

[0008] Furthermore, the inflation / deflation port is sealed by a threaded sealing pin.

[0009] Furthermore, the top of the lower cover body is provided with a vibration plate positioning groove, and the edge of the vibration plate is provided with an enlarged positioning sealing ring. The positioning ring is located in the positioning groove, and after the accumulator is assembled, the positioning sealing ring abuts against the surface of the upper cover protrusion.

[0010] Furthermore, the center of the bottom of the vibrating plate protrudes upwards, and a reinforcing part is provided on the top surface of the protrusion.

[0011] Furthermore, the thickness of the reinforcing part is at least twice the thickness of the vibrating plate body.

[0012] Furthermore, the reinforcing part is configured to have a protective sheet embedded or pasted in it.

[0013] Furthermore, the protective sheet is a nylon sheet. Furthermore, the outer nut is provided with several screw holes on its side, and positioning bolts are provided on the screw holes. After the positioning bolts are tightened, rotational loosening between the inner thread of the outer nut and the outer thread of the lower cover is prevented.

[0014] Compared with the prior art, the present invention achieves the following significant beneficial effects through its innovative structural design: The structure is detachable, maintenance is convenient, and costs are reduced: This utility model replaces the traditional welding fixing method with a threaded engagement structure of "external thread on the lower cover" and "external nut". When the internal vibration plate needs to be replaced, simply loosen the external nut to easily separate the upper and lower covers for repair or replacement. The operation is non-destructive, avoiding the destructive cutting required by traditional welding accumulators, greatly simplifying the maintenance process and shortening system downtime.

[0015] Reusable, extending overall lifespan, economical and environmentally friendly: Since the top and bottom covers are not damaged during disassembly and assembly, they are highly reusable. Users only need to replace the low-cost internal consumable part, the vibration plate, to restore the full function of the accumulator, significantly extending the service life of the entire device and reducing the user's long-term operating costs and equipment purchase costs.

[0016] Improving safety and reliability and eliminating welding hazards: This utility model fundamentally avoids various defects that may be caused by welding processes.

[0017] Locking mechanism to prevent loosening: By setting a positioning bolt on the outer nut, after tightening the outer nut, the positioning bolt can be tightened to make it abut against the lower cover body, which can play a reliable role in preventing loosening. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of a detachable energy storage device according to this utility model.

[0020] Figure 2 This is a cross-sectional structural diagram of a detachable energy storage device according to the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the vibrating plate in a detachable accumulator according to this utility model.

[0022] The markings in the diagram are: 1. Top cover; 2. Bottom cover; 3. Vibrating plate; 4. Air inlet / outlet; 5. Hydraulic oil hole; 6. Outer nut; 7. Sealing pin; 11. Pressure chamber; 12. Top cover flange; 21. Hydraulic oil chamber; 22. Bottom cover external thread; 23. Vibrating plate positioning groove; 31. Positioning sealing ring; 32. Reinforcing part; 61. Inner flange; 62. Outer nut internal thread; 63. Screw hole; 64. Positioning bolt. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 This utility model provides a detachable energy storage device, the structure and working principle of which are as follows: This embodiment discloses a detachable accumulator, mainly comprising an upper cover 1 and a lower cover 2. The upper cover 1 and the lower cover 2 together constitute the housing of the accumulator. A charging / discharging port 4 is provided at the top center of the upper cover 1 for charging or discharging gas, typically nitrogen, into or out of the accumulator. A hydraulic oil port 5 is provided at the bottom center of the lower cover 2 for connecting to a hydraulic system, allowing hydraulic oil to enter and exit the accumulator.

[0025] Between the upper cover 1 and the lower cover 2, a core component—a vibrating plate 3, also known as a diaphragm or bladder in some applications—is installed. This vibrating plate 3 divides the internal space of the accumulator into two independent chambers: a pressure chamber 11 located at the top and a hydraulic oil chamber 21 located at the bottom. The pressure chamber 11 is connected to the inflation / deflation port 4 and is used to store high-pressure gas; the hydraulic oil chamber 21 is connected to the hydraulic oil port 5 and is used to contain hydraulic oil.

[0026] The key innovation of this utility model lies in its detachable connection structure. Specifically, the lower edge of the upper cover 1 extends outward in an integrally formed annular upper cover flange 12. The outer wall of the lower cover 2 has an external thread 22. During assembly, the vibrating plate 3 is first placed on the lower cover 2, and then the upper cover 1 is placed on top, pressing the upper cover flange 12 against the edge of the vibrating plate 3. Finally, a specially designed outer nut 6 is used for locking. The inner side of the outer nut 6 has an internal thread 62 that matches the external thread 22 of the lower cover, and its upper part extends inward to form an inner flange 61. By rotating the outer nut 6, its internal thread 62 engages with the external thread 22 of the lower cover, and the inner flange 61 of the outer nut 6 applies a huge axial pressure downward, firmly pressing the upper cover flange 12. This design achieves a reliable sealing and fastening connection between the upper cover 1, the vibrating plate 3, and the lower cover 2 through strong mechanical pressure.

[0027] To achieve better sealing and positioning, a vibration plate positioning groove 23 is provided on the top of the lower cover 2, on the annular surface that contacts the vibration plate 3. Correspondingly, a positioning sealing ring 31 with an enlarged cross-section is integrally formed on the edge of the vibration plate 3. During assembly, the positioning sealing ring 31 is precisely embedded in the vibration plate positioning groove 23. When the outer nut 6 is tightened, the bottom surface of the upper cover flange 12 will abut tightly against the upper surface of the positioning sealing ring 31, pressing the positioning sealing ring 31 firmly into the positioning groove 23, forming an extremely reliable radial and axial double sealing structure, effectively preventing leakage of high-pressure gas or hydraulic oil.

[0028] To enhance the durability of the vibratory plate 3, especially in situations where the hydraulic oil tank 21 pressure is low and the vibratory plate 3 may contact the bottom of the lower cover 2, the center bottom of the vibratory plate 3 protrudes upwards, and a reinforcing part 32 is provided on the top surface of the protrusion. The thickness of the reinforcing part 32 is designed to be at least twice, for example, two, three, or more times the thickness of the vibratory plate 3 body, to significantly enhance its impact and wear resistance. As a preferred embodiment, the reinforcing part 32 can be further attached with a protective sheet, preferably a nylon sheet, by embedding or pasting. Nylon material has excellent wear resistance, self-lubrication, and impact resistance, effectively preventing puncture or premature wear caused by direct contact between the vibratory plate 3 and the metal edge of the hydraulic oil hole 5 port.

[0029] To facilitate connection with external pipelines, both the inflation / deflation port 4 and the hydraulic oil port 5 are equipped with standard internal or external threads. After inflation, the inflation / deflation port 4 can be sealed by tightening a threaded sealing pin 7 to ensure the long-term airtightness of the pressure chamber 11.

[0030] To ensure the reliability of the accumulator connection under long-term use or severe vibration conditions, this embodiment also includes an anti-loosening measure. Several screw holes 63, for example two or four, are evenly distributed circumferentially on the side of the outer nut 6. Locating bolts 64 are fitted into these screw holes 63. After the outer nut 6 is tightened to a predetermined torque, these locating bolts 64 are then tightened, ensuring their ends firmly abut against the outer wall of the lower cover 2. The resulting friction or pushing force effectively prevents accidental rotational loosening of the outer nut 6, thus ensuring the long-term stability and safety of the entire structural connection.

[0031] During operation, nitrogen gas at a predetermined pressure is introduced into the pressure chamber 11 through the inflation / deflation port 4 and sealed with the sealing pin 7. When the hydraulic system is working, when the system pressure rises, excess hydraulic oil enters the hydraulic oil chamber 21 through the hydraulic oil hole 5, pushing the vibrating plate 3 upward and compressing the gas in the pressure chamber 11, thereby storing energy; when the system pressure drops and energy replenishment is needed, the high-pressure gas in the pressure chamber 11 expands, pushing the vibrating plate 3 downward and squeezing the hydraulic oil out of the hydraulic oil chamber 21, releasing energy, thus playing the roles of stabilizing pressure, storing energy, and absorbing pulsations.

[0032] When maintenance of the accumulator is required, such as replacing the aging vibrating plate 3, the operator only needs to loosen the positioning bolt 64 first, and then use a suitable tool to rotate the outer nut 6 in the opposite direction to remove it. After that, the upper cover 1 can be easily removed, exposing the internal vibrating plate 3 for replacement. The whole process is quick and convenient, and will not cause any damage to the main metal components such as the upper cover 1, lower cover 2, and outer nut 6, and can be reused.

[0033] 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, improvements, etc., 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. A detachable energy storage device, comprising an upper cover (1) and a lower cover (2), characterized in that: The upper cover (1) includes an air inlet / outlet (4) disposed on the upper cover. A vibrating plate (3) is disposed between the upper cover (1) and the lower cover (2). The vibrating plate (3) is disposed inside the lower cover (2) and divides the interior of the upper cover (1) and the lower cover (2) into a pressure chamber (11) and a hydraulic oil chamber (21) through the vibrating plate (3). A hydraulic oil hole (5) communicating with the hydraulic oil chamber (21) is provided at the bottom of the lower cover (2). An upper cover flange (1) is provided on the lower edge of the upper cover (1) extending outward. 2) The outer edge of the lower cover (2) body is provided with a lower cover external thread (22) and also includes an outer nut (6). The upper part of the outer nut (6) is provided with an inner protrusion (61), and the inner side of the outer nut is provided with an outer nut inner thread (62) that cooperates with the lower cover external thread (22). After the outer nut inner thread (62) of the outer nut (6) cooperates with the lower cover external thread (22), the inner protrusion (61) presses the upper cover protrusion (12) tightly, so that the upper cover (1) and the lower cover (2) are tightly fitted.

2. A detachable energy storage device according to claim 1, characterized in that: The air inlet / outlet (4) and hydraulic oil hole (5) are provided with internal and / or external threads.

3. A detachable energy storage device according to claim 1, characterized in that: The inflation / deflation port (4) is sealed by a threaded sealing pin (7).

4. A detachable energy storage device according to claim 1, characterized in that: The lower cover (2) has a vibration plate positioning groove (23) on its top body. The vibration plate (3) has an enlarged positioning sealing ring (31) on its edge. The positioning sealing ring is located in the positioning groove (23) and abuts against the surface of the upper cover protrusion (12) after the accumulator is assembled.

5. A detachable energy storage device according to claim 1, characterized in that: The center of the bottom of the vibrating plate (3) protrudes upward, and a reinforcing part (32) is provided on the top surface of the protrusion.

6. A detachable energy storage device according to claim 5, characterized in that: The thickness of the reinforcing part (32) is at least twice the thickness of the vibrating plate (3) body.

7. A detachable energy storage device according to claim 5, characterized in that: The reinforcing part (32) is configured to have a protective sheet embedded or pasted in it.

8. A detachable energy storage device according to claim 7, characterized in that: The protective sheet is made of nylon.

9. A detachable energy storage device according to claim 1, characterized in that: The outer nut (6) is also provided with several screw holes (63) on its side. The screw holes (63) are provided with positioning bolts (64). After the positioning bolts (64) are tightened, the inner thread (62) of the outer nut (6) and the outer thread (22) of the lower cover are prevented from rotating and loosening.

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