Energy accumulator convenient to maintain

Abstract

The utility model provides an energy accumulator convenient to maintain, which belongs to the technical field of energy accumulators and comprises an energy accumulator body, an inflation valve, a pressure sensor and a connecting valve, an inflation cavity is arranged in the energy accumulator body, the inflation valve and the connecting valve are both arranged on the energy accumulator body, a connecting air passage is arranged in the connecting valve, and the pressure sensor is arranged in the connecting air passage. The connecting air channel comprises a first connecting end and a second connecting end, the first connecting end is communicated with the inflation cavity, the pressure sensor is connected to the second connecting end, a movable valve rod is arranged between the first connecting end and the second connecting end, an elastic piece is arranged between the movable valve rod and the first connecting end, and the elastic piece abuts against the movable valve rod so that the movable valve rod can be located at the first position. After the pressure sensor is installed at the second connecting end, the pressure sensor abuts against the movable valve rod, the movable valve rod is made to be located at the second position, and the connecting air channel is communicated. According to the energy accumulator convenient to maintain, the pressure sensor is fast and convenient to disassemble, assemble and replace.

Description

Technical Field

[0001] The utility model belongs to the technical field of accumulators, and more specifically, relates to an accumulator that is convenient for maintenance. Background Technique

[0002] An accumulator is an energy storage device used to store and release the pressure energy of liquids or gases. The accumulator is usually connected to a hydraulic system to absorb shocks, reduce vibrations, and improve system stability. Commonly used accumulators are internally provided with diaphragms or pistons, and the inner cavity of the accumulator is divided into an air charging cavity and an oil charging cavity by the diaphragm or piston. During use, a gas with a rated pressure is pre-charged into the air charging cavity. When the pressure of the hydraulic system exceeds the internal pressure of the accumulator, the oil enters the oil charging cavity, compresses the gas, and converts the pressure in the oil into the internal energy of the gas; when the pressure of the hydraulic system is lower than the internal pressure of the accumulator, the oil in the accumulator flows to the external system under the action of the high-pressure gas to release energy.

[0003] In practical applications, since the gas in the air charging cavity of the accumulator is in a high-pressure state for a long time, some gas will penetrate the outer shell of the accumulator and escape to the outside of the air charging cavity, resulting in the gas pressure in the air charging cavity of the accumulator being less than the rated pressure. Once the gas pressure in the air charging cavity is less than the rated pressure, the effectiveness of the accumulator will be greatly reduced. In order to detect the gas pressure in the air charging cavity of the accumulator, a pressure sensor is usually installed on the air charging port of the accumulator. Although the above setting solves the problem of gas pressure detection, there are also some drawbacks. For example, when the pressure sensor fails, the user needs to release the gas in the air charging cavity of the accumulator before the pressure sensor can be replaced, which causes gas loss; and subsequently, the accumulator needs to be recharged with gas in the air charging cavity before it can be used, and the accumulator charging requires special charging equipment. Generally, the conditions of users are restricted, and most of them do not have special charging equipment, resulting in difficulties in secondary charging and the accumulator cannot work. Content of the Utility Model

[0004] The purpose of the utility model is to provide an accumulator that is convenient for maintenance, aiming to solve the problem of inconvenient replacement of the pressure sensor involved in the background technique.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: to provide an accumulator that is convenient for maintenance, including:

[0006] An accumulator body, in which an air charging cavity is provided;

[0007] An air charging valve, which is arranged on the accumulator body and is communicated with the air charging cavity through a first air passage;

[0008] A pressure sensor, used to detect the gas pressure in the air charging cavity;

[0009] A connecting valve is provided on the accumulator body, on one side of the charging valve. A connecting air passage is provided in the connecting valve. The connecting air passage includes a first connecting end and a second connecting end. The first connecting end is communicated with the charging cavity through a second air passage. The pressure sensor is connected to the second connecting end. An active valve stem is provided between the first connecting end and the second connecting end. The active valve stem slides between a first position and a second position in the connecting air passage. An elastic member is provided between the active valve stem and the first connecting end. When the pressure sensor is not installed at the second connecting end, the elastic member presses against the active valve stem to make the active valve stem in the first position, and the connecting air passage is closed. When the pressure sensor is installed at the second connecting end, the pressure sensor presses against the active valve stem to compress the elastic member, making the active valve stem in the second position, and the connecting air passage is communicated.

[0010] In a possible implementation manner, a wide-diameter section and a narrow-diameter section are connected to each other in the connecting air passage. The wide-diameter section is on one side of the first connecting end, and the narrow-diameter section is on one side of the second connecting end. The active valve stem is inserted into the narrow-diameter section, and there is a seal between the active valve stem and the narrow-diameter section. An air guiding passage is provided on the active valve stem. The air guiding passage includes a first port and a second port. The first port is communicated with the first connecting end, and the second port is provided on the side wall of the active valve stem. When the active valve stem is in the first position, the second port is located in the narrow-diameter section, and the connecting air passage is closed. When the active valve stem is in the second position, the second port is located in the wide-diameter section, and the connecting air passage is communicated.

[0011] In a possible implementation manner, a stop block is provided in the first connecting end. A communication hole runs through the middle of the stop block, and the communication hole communicates the second air passage with the wide-diameter section. The elastic member is arranged between the stop block and the active valve stem.

[0012] In a possible implementation manner, an anti-detachment block is provided at one end of the active valve stem close to the stop block. The anti-detachment block is located in the wide-diameter section. The diameter of the anti-detachment block is larger than the inner diameter of the narrow-diameter section and smaller than the inner diameter of the wide-diameter section.

[0013] In a possible implementation manner, a first sealing ring is sleeved on the active valve stem. The first sealing ring is located at one end of the active valve stem close to the anti-detachment block. When the active valve stem is in the first position, the first sealing ring presses against between the stop block and the wide-diameter section to seal between the active valve stem and the wide-diameter section.

[0014] In a possible implementation, a first-stage hole is axially provided on the end face of the movable valve stem near the second connection end, and a second-stage hole is radially provided in the middle of the side wall of the movable valve stem. The first-stage hole and the second-stage hole communicate with each other to form the air guide passage.

[0015] In a possible implementation, a second sealing ring is sleeved on the movable valve stem. The second sealing ring is located above the second-stage hole, and the second sealing ring abuts against the reduced-diameter section to seal the movable valve stem and the reduced-diameter section.

[0016] In a possible implementation, a connection groove is provided on the second connection end. The pressure sensor is inserted into the connection groove. The end of the movable valve stem near the second connection end extends toward the second connection end into the connection groove. When the pressure sensor is installed, it presses the movable valve stem to move toward the first connection end, so that the movable valve stem moves to the second position.

[0017] The beneficial effect of an energy accumulator convenient for maintenance provided by the present utility model is as follows: Compared with the prior art, for the energy accumulator convenient for maintenance of the present utility model, a connection valve is provided between the energy accumulator body and the pressure sensor. When the pressure sensor is connected to the connection valve, the pressure sensor drives the movable valve stem to move the connection valve to the second position, so that the connection air passage is communicated, and the high-pressure gas in the inflation chamber can contact the pressure sensor to realize pressure monitoring. When the pressure sensor fails and needs to be replaced, the pressure sensor is removed from the connection valve, and the movable valve stem in the connection valve moves to the first position under the drive of the elastic member, so that the connection air passage is closed, thereby avoiding the leakage of the high-pressure gas in the inflation chamber. Furthermore, after the user replaces the pressure sensor, it is not necessary to inflate the energy accumulator body again. The energy accumulator convenient for maintenance provided by the present utility model makes the disassembly, installation and replacement of the pressure sensor quick and convenient, greatly improving the user experience. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0019] Figure 1 It is a longitudinal sectional structure schematic diagram of an energy accumulator convenient for maintenance provided by an embodiment of the present utility model;

[0020] Figure 2Longitudinal sectional view of the connection valve provided by the embodiment of the present utility model when the pressure sensor is not installed;

[0021] Figure 3 Longitudinal sectional view of the connection valve provided by the embodiment of the present utility model after the pressure sensor is installed.

[0022] Explanation of the reference numerals in the drawings:

[0023] 1. Accumulator body; 11. Cylinder block; 12. Gas end cover; 121. Inflation interface; 122. Installation groove; 13. Liquid end cover; 14. Piston; 101. Inflation chamber; 102. First through hole; 103. Second through hole; 2. Inflation valve; 3. Pressure sensor; 4. Connection valve; 401. First connection end; 402. Second connection end; 403. Connection groove; 41. Connection air passage; 411. Wide diameter section; 412. Reduced diameter section; 42. Movable valve stem; 421. First section hole; 422. Second section hole; 43. Anti - detachment block; 44. Stop block; 441. Communication hole; 45. Circular boss; 5. Helical spring; 61. First sealing ring; 62. Second sealing ring. Detailed implementation manners

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0025] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0027] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0028] Please refer to Figures 1 to 3 , and a pressure accumulator convenient for maintenance provided by the present utility model will be described hereinafter. The pressure accumulator convenient for maintenance includes a pressure accumulator body 1, an inflation valve 2, a pressure sensor 3, and a connection valve 4. Among them, an inflation chamber 101 is provided in the pressure accumulator body 1. The inflation valve 2 is provided on the pressure accumulator body 1 and is communicated with the inflation chamber 101 through a first air passage. The pressure sensor 3 is used to detect the gas pressure in the inflation chamber 101. The connection valve 4 is provided on the pressure accumulator body 1 and is located on one side of the inflation valve 2. A connection air passage 41 is provided in the connection valve 4. The connection air passage 41 includes a first connection end 401 and a second connection end 402. The first connection end 401 is communicated with the inflation chamber 101 through a second air passage. The pressure sensor 3 is connected to the second connection end 402. An active valve stem 42 is provided between the first connection end 401 and the second connection end 402. The active valve stem 42 is slidably connected between a first position and a second position in the connection air passage 41. An elastic member is provided between the active valve stem 42 and the first connection end 401. When the pressure sensor 3 is not installed on the second connection end 402, the elastic member presses against the active valve stem 42 to make the active valve stem 42 in the first position, and the connection air passage 41 is closed. When the pressure sensor 3 is installed on the second connection end 402, the pressure sensor 3 presses against the active valve stem 42 to compress the elastic member, making the active valve stem 42 in the second position, and the connection air passage 41 is communicated.

[0029] Compared with the prior art, for the pressure accumulator convenient for maintenance provided by the present utility model, a connection valve 4 is provided between the pressure accumulator body 1 and the pressure sensor 3. When the pressure sensor 3 is connected to the connection valve 4, the pressure sensor 3 drives the active valve stem 42 to move the connection valve 4 to the second position, so that the connection air passage 41 is communicated, and then the high-pressure gas in the inflation chamber 101 can contact the pressure sensor 3 to realize pressure monitoring. When the pressure sensor 3 fails and needs to be replaced, the pressure sensor 3 is removed from the connection valve 4, and the active valve stem 42 in the connection valve 4 moves to the first position under the drive of the elastic member, so that the connection air passage 41 is closed, thereby avoiding the leakage of the high-pressure gas in the inflation chamber 101. Furthermore, after the user replaces the pressure sensor 3, it is not necessary to inflate the pressure accumulator body 1 again. The pressure accumulator convenient for maintenance provided by the present utility model makes the disassembly, installation and replacement of the pressure sensor 3 quick and convenient, greatly improving the user experience.

[0030] In this embodiment, please refer to Figures 1 to 3 , the accumulator body 1 is a capsule accumulator, including a cylinder block 11, an air end cover 12 is provided at the upper end of the cylinder block 11, a liquid end cover 13 is provided at the lower end of the cylinder block 11, a piston 14 is provided in the cylinder block 11, an inflation chamber 101 is located between the air end cover 12 and the piston 14, the first air passage is a first through hole 102 longitudinally penetrating the air end cover 12, an inflation interface 121 is provided at the outer port of the first through hole 102, an inflation valve 2 is connected to the inflation interface 121, and in application, gas can be filled into the inflation chamber 101 through the inflation valve 2 and the first air passage.

[0031] In this embodiment, an installation groove 122 is provided on the outer end face of the air end cover 12, the installation groove 122 is located on one side of the inflation interface 121, a second through hole 103 longitudinally penetrating the air end cover 12 is provided at the bottom of the installation groove 122, the second through hole 103 is the second air passage, a connection valve 4 is installed in the installation groove 122, a connection air passage 41 is a through hole provided in the middle of the connection valve 4 and penetrating along its axial direction, the lower end of the connection air passage 41 is a first connection end 401, the first connection end 401 is inserted into the installation groove 122 and communicated with the second air passage, the upper end of the connection air passage 41 is a second connection end 402, a connection groove 403 is provided on the second connection end 402, and a pressure sensor 3 is inserted into the connection groove 403.

[0032] In this embodiment, please refer to Figure 2 and Figure 3 , a wide-diameter section 411 and a narrow-diameter section 412 are connected to each other in the connection air passage 41, wherein the wide-diameter section 411 is located on one side of the first connection end 401, the narrow-diameter section 412 is located on one side of the second connection end 402, a movable valve stem 42 is inserted into the narrow-diameter section 412, the movable valve stem 42 is sealed with the narrow-diameter section 412, an air guiding passage is provided on the movable valve stem 42, the air guiding passage includes a first port and a second port, the first port is communicated with the first connection end 401, the second port is provided on the side wall of the movable valve stem 42, when the movable valve stem 42 is in the first position, the second port of the air guiding passage is located in the narrow-diameter section 412, and the connection air passage 41 is closed, when the movable valve stem 42 is in the second position, the second port of the air guiding passage is located in the wide-diameter section 411, and the connection air passage 41 is communicated.

[0033] Furthermore, please refer to Figure 2 and Figure 3 , a stop block 44 is provided in the first connection end 401 of the connection air passage 41, a communication hole 441 is provided through the middle of the stop block 44, the communication hole 441 communicates the second air passage with the wide-diameter section 411, in this embodiment, the elastic member is a spiral spring 5, and the spiral spring 5 is provided between the stop block 44 and the movable valve stem 42.

[0034] Furthermore, please refer to Figure 2 and Figure 3, at one end of the movable valve stem 42 close to the stopper 44, there is an anti - detachment block 43. The anti - detachment block 43 is located within the wide - diameter section 411. The diameter of the anti - detachment block 43 is greater than the inner diameter of the reduced - diameter section 412 and less than the inner diameter of the wide - diameter section 411. By setting the anti - detachment block 43, the movable valve stem 42 can be prevented from sliding upward out of the reduced - diameter section 412. In this embodiment, on one side of the anti - detachment block 43 facing the stopper 44, and on one side of the stopper 44 facing the anti - detachment block 43, there are circular protrusions 45. The size of the circular protrusions 45 is adapted to the inner diameter of the helical spring 5. The two ends of the helical spring 5 are respectively inserted into the above - mentioned two circular protrusions 45, thereby improving the stability of the helical spring 5.

[0035] In this embodiment, please refer to Figure 2 and Figure 3 , the end of the movable valve stem 42 close to the second connection end 402 extends toward the second connection end 402 into the connection groove 403. On the end face of the movable valve stem 42 close to the second connection end 402, a first - stage hole 421 is provided along its axial direction. In the middle of the side wall of the movable valve stem 42, a second - stage hole 422 is provided along its radial direction. The first - stage hole 421 and the second - stage hole 422 communicate with each other to form an air - guiding channel. In this embodiment, the first port of the air - guiding channel is the port of the first - stage hole 421 opened on the end face of the movable valve stem 42, and the second port of the air - guiding channel is the port of the second - stage hole 422 opened on the side wall of the movable valve stem 42. In application, when the pressure sensor 3 is not installed, the helical spring 5 presses the movable valve stem 42 to move to the first position. At this time, the second port of the air - guiding channel is within the reduced - diameter section 412, and the second port is sealed by the side wall of the reduced - diameter section 412, so that the connection air channel 41 is in a closed state. When the pressure sensor 3 is installed, the pressure sensor 3 is inserted downward to the bottom of the connection groove 403, pressing the movable valve stem 42 to move toward the first connection end 401 side to compress the helical spring 5, so that the movable valve stem 42 moves to the second position. At this time, the second port of the air - guiding channel is within the wide - diameter section 411, making the connection air channel 41 in a connected state.

[0036] In this embodiment, please refer to Figure 2 and Figure 3 , in order to improve the sealing performance between the movable valve stem 42 and the connection air channel 41, a first sealing ring 61 and a second sealing ring 62 are sleeved on the movable valve stem 42. Among them, the first sealing ring 61 is located at one end of the movable valve stem 42 close to the anti - detachment block 43. When the movable valve stem 42 is in the first position, the first sealing ring 61 presses against between the stopper 44 and the wide - diameter section 411 to seal between the movable valve stem 42 and the wide - diameter section 411. The second sealing ring 62 is located above the second - stage hole 422, and the second sealing ring 62 abuts against the reduced - diameter section 412 for sealing between the movable valve stem 42 and the reduced - diameter section 412.

[0037] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An accumulator that is easy to maintain, characterized in that: include: An accumulator body (1), wherein an air charging chamber (101) is provided in the accumulator body (1); A charging valve (2) is arranged on the accumulator body (1), and the charging valve (2) is connected to the charging chamber (101) through a first air passage; A pressure sensor (3) for detecting the gas pressure in the inflation chamber (101); A connecting valve (4) is provided on the accumulator body (1) and is located on one side of the charging valve (2). A connecting air passage (41) is provided in the connecting valve (4). The connecting air passage (41) comprises a first connecting end (401) and a second connecting end (402). The first connecting end (401) is connected to the charging chamber (101) through the second connecting end (402). The pressure sensor (3) is connected to the second connecting end (402). A movable valve stem (42) is provided between the first connecting end (401) and the second connecting end (402). The movable valve stem (42) is slidably connected to a second connecting end (401) in the connecting air passage (41). An elastic member is provided between the movable valve stem (42) and the first connecting end (401) between the first position and the second position. When the pressure sensor (3) is not installed on the second connecting end (402), the elastic member presses against the movable valve stem (42) so that the movable valve stem (42) is in the first position and the connecting air passage (41) is closed. When the pressure sensor (3) is installed on the second connecting end (402), the pressure sensor (3) presses against the movable valve stem (42) to compress the elastic member so that the movable valve stem (42) is in the second position and the connecting air passage (41) is connected.

2. An accumulator that is easy to maintain as claimed in claim 1, characterized in that: The connecting air passage (41) is provided with a wide diameter section (411) and a reduced diameter section (412) which are connected to each other. The wide diameter section (411) is located on the side of the first connecting end (401), and the reduced diameter section (412) is located on the side of the second connecting end (402). The movable valve stem (42) is inserted into the reduced diameter section (412), and the movable valve stem (42) and the reduced diameter section (412) are sealed. The movable valve stem (42) is provided with an air duct, and the air duct comprises a first port and a second port. The first port is in communication with the first connecting end (401), and the second port is provided on the side wall of the movable valve stem (42). When the movable valve stem (42) is in the first position, the second port is located in the reduced diameter section (412), and the connecting air passage (41) is closed. When the movable valve stem (42) is in the second position, the second port is located in the wide diameter section (411), and the connecting air passage (41) is connected.

3. An accumulator that is easy to maintain as claimed in claim 2, characterized in that: A stopper (44) is provided inside the first connecting end (401), a connecting hole (441) is provided through the middle of the stopper (44), the connecting hole (441) connects the second air passage and the wide diameter section (411), and the elastic member is arranged between the stopper (44) and the movable valve stem (42).

4. An accumulator that is easy to maintain as claimed in claim 3, characterized in that: An anti-slip block (43) is provided at one end of the movable valve stem (42) close to the stop block (44); the anti-slip block (43) is located in the wide diameter section (411); the diameter of the anti-slip block (43) is larger than the inner diameter of the reduced diameter section (412) and smaller than the inner diameter of the wide diameter section (411).

5. An accumulator that is easy to maintain as claimed in claim 4, characterized in that: A first sealing ring (61) is sleeved on the movable valve stem (42). The first sealing ring (61) is located at one end of the movable valve stem (42) close to the anti-dropping block (43). When the movable valve stem (42) is in the first position, the first sealing ring (61) is pressed between the stop block (44) and the wide-diameter section (411) to seal between the movable valve stem (42) and the wide-diameter section (411).

6. An accumulator that is easy to maintain as claimed in claim 5, characterized in that: A first hole (421) is provided on the end surface of the movable valve stem (42) close to the second connecting end (402) along its axial direction, and a second hole (422) is provided in the middle of the side wall of the movable valve stem (42) along its radial direction. The first hole (421) and the second hole (422) are connected to each other to form the air duct.

7. An accumulator that is easy to maintain as claimed in claim 6, characterized in that: A second sealing ring (62) is sleeved on the movable valve stem (42). The second sealing ring (62) is located above the second section hole (422). The second sealing ring (62) abuts against the reduced diameter section (412) to seal the movable valve stem (42) and the reduced diameter section (412).

8. An accumulator that is easy to maintain as claimed in claim 7, characterized in that: The second connecting end (402) is provided with a connecting groove (403), and the connecting groove (403) is used to insert the pressure sensor (3). The end of the movable valve stem (42) close to the second connecting end (402) extends toward the second connecting end (402) and into the connecting groove (403). When the pressure sensor (3) is installed, the movable valve stem (42) is pressed to move toward the first connecting end (401), so that the movable valve stem (42) moves to the second position.

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