Pressure accumulator cylinder barrel and pressure accumulator

Abstract

The utility model relates to the technical field of pressure accumulators, and particularly discloses a pressure accumulator cylinder barrel which comprises a barrel body, the opening end of the barrel body is in threaded connection with a liquid cavity end cover, an annular groove is formed in the outer wall of a barrel body of the barrel body, and a carbon fiber winding layer is arranged in the annular groove. And annular convex blocks are arranged on the outer wall of the barrel body of the barrel and positioned on two sides of the annular groove. According to the pressure accumulator cylinder barrel, the annular groove is formed in the outer wall of the barrel body, the carbon fiber winding layer is arranged in the annular groove, and due to the arrangement of the annular groove, winding arrangement of the carbon fiber winding layer on the barrel body and stability and reliability of connection of the carbon fiber winding layer on the barrel body are facilitated; due to the arrangement of the annular protruding blocks, under the condition that the thickness of the cylinder body is not increased, enough winding space is provided for the annular grooves, deformation of the pressure accumulator in the radial direction can be reduced through the carbon fiber winding layer, the anti-explosion performance of the cylinder body is improved, the carbon fiber winding layer has the advantage of being light in weight, and the weight of the cylinder body can be effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of accumulators, and particularly relates to an accumulator cylinder barrel and an accumulator. Background Art

[0002] With the continuous development of China's industrial technology, a large number of accumulators are widely used as emergency auxiliary oil sources for systems in industries such as petrochemical and aviation. During the use of accumulators, problems such as easy deformation and low-temperature leakage often occur, resulting in a reduction in the functional characteristics of the accumulators or even the failure of the system operation. Therefore, the pressure-bearing performance and low-temperature sealing performance of accumulators have attracted much attention during the research and development process.

[0003] Due to limited strength, traditional steel metal accumulators often increase the thickness in design to reduce the radial deformation gap of the accumulator and thus improve its sealing ability. However, the accumulators designed in this way have extremely high weights. Compared with traditional steel accumulators, carbon fiber composite accumulators have significant advantages such as light weight, high strength, and good explosion resistance, and have a large market. At present, the relevant research on carbon fiber composite accumulators has just started in China, and there are few related products, which need to be purchased from abroad. However, the cost of purchasing equipment is too high. At the same time, long-term reliance on foreign technology products will hinder the industrial development of our country. Therefore, it is urgent to carry out research on lightweight composite accumulators suitable for low-temperature and high-pressure sealing to achieve technological breakthroughs in aspects such as the structural weight, sealing performance, pressure-bearing performance, and explosion resistance of accumulators. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an accumulator cylinder barrel and an accumulator to solve the problems of large weight and poor explosion resistance of traditional steel metal accumulators.

[0005] The utility model is realized through the following technical solutions:

[0006] An accumulator cylinder barrel includes a cylinder body. The cylinder body is a cavity structure with one end open. A liquid cavity end cover is threadedly connected to the open end of the cylinder body. A liquid cavity joint communicating with the inside of the cylinder body is arranged on the liquid cavity end cover. An air cavity joint communicating with the inside of the cylinder body is arranged at the bottom end of the cylinder body.

[0007] An annular groove is arranged on the outer wall of the barrel body of the cylinder body. A carbon fiber winding layer is arranged in the annular groove. Annular protrusions are arranged on the outer wall of the barrel body of the cylinder body on both sides of the annular groove. The outer diameter of the annular protrusions is greater than the outer diameter of the barrel body.

[0008] In some embodiments, the total thickness of the barrel body of the cylinder body after setting the carbon fiber winding layer is greater than the thickness of other positions of the barrel body of the cylinder body.

[0009] In some embodiments, the outer diameter of the liquid cavity end cap is greater than that of the cylinder body, so that the end face of the connection end of the liquid cavity end cap and the cylinder body forms an annular limiting end face on the cylinder body;

[0010] One end of the carbon fiber winding layer winds and extends to the position where the limiting end face is located. When the carbon fiber winding layer is wound, it can be pressed into the contact surface between the liquid cavity end cap and the cylinder body through the small holes at the carbon fiber winding inlet.

[0011] In some embodiments, one end of the carbon fiber winding layer that winds and extends to the limiting end face is coated on the limiting end face. The carbon fiber winding layer is wound on the cylinder body at 90° orthogonally, so that the carbon fiber winding layer bears the radial stress and the cylinder body bears the axial stress.

[0012] In some embodiments, a first connection part and a first contact part are sequentially arranged at the open end of the cylinder body along the direction close to the open end. The outer diameter of the first connection part is greater than that of the first contact part. One end of the liquid cavity end cap is sequentially provided with a second connection part and a second contact part that respectively cooperate with the first connection part and the first contact part along the direction close to the end cap. The first connection part and the second connection part are threadedly connected, and the outer wall of the first contact part fits with the inner wall of the second contact part.

[0013] In some embodiments, a first sealing member is arranged between the second contact part and the first contact part.

[0014] In some embodiments, the liquid cavity joint and the liquid cavity end cap are of an integrally formed structure, and the gas cavity joint and the cylinder body are of an integrally formed structure.

[0015] A pressure accumulator includes the above-mentioned pressure accumulator cylinder barrel.

[0016] In some embodiments, a liquid cavity nozzle is installed in the liquid cavity joint, and a gas cavity nozzle is installed in the gas cavity joint. A first installation hole is opened in the radial direction of the liquid cavity nozzle, and a liquid cavity pressure sensor is threadedly connected to the first installation hole. A second installation hole is opened in the radial direction of the gas cavity nozzle, and a gas cavity pressure sensor is threadedly connected to the second installation hole.

[0017] In some embodiments, a third connection part and a third contact part are sequentially arranged in both the liquid cavity joint and the gas cavity joint along the direction close to the open end. The inner diameter of the third connection part is greater than that of the third contact part. Fourth connection parts and fourth contact parts that respectively cooperate with the third connection part and the third contact part are arranged on the outer walls of the liquid cavity nozzle and the gas cavity nozzle. The third connection part and the fourth connection part are threadedly connected, and the inner wall of the third contact part can fit with the outer wall of the fourth contact part.

[0018] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0019] 1. A accumulator cylinder of the present application, an annular groove is provided on the outer wall of the barrel body of the cylinder, and a carbon fiber winding layer is arranged in the annular groove. The arrangement of the annular groove facilitates the winding of the carbon fiber winding layer on the cylinder body and the stability and reliability of the connection of the carbon fiber winding layer on the cylinder body. The arrangement of the annular convex block provides sufficient winding space for the annular groove without increasing the thickness of the cylinder body. The carbon fiber winding layer can reduce the deformation of the accumulator in the radial direction, improve the anti-explosion performance of the cylinder body, and the carbon fiber winding layer has the advantage of light weight, which can effectively reduce the weight of the cylinder body.

[0020] 2. The cylinder body adopts a cavity structure with one end open. The open end of the cylinder body is threadedly connected with a liquid cavity end cover, and the bottom end of the cylinder body is integrally formed with the cylinder body, effectively reducing stress concentration and reducing the sealing surface. At the same time, through the improvement of the structure of the connection part between the cylinder body and the liquid cavity end cover, the sealing performance and reliability at the connection position are increased, the overall sealing performance of the cylinder barrel is improved, and the processing and forming of the cylinder barrel are facilitated. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of the accumulator cylinder in the embodiment of the present invention;

[0023] Figure 2 It is a schematic structural diagram of the liquid cavity nozzle in the embodiment of the present invention;

[0024] Figure 3 It is a schematic structural diagram of the cylinder body in the embodiment of the present invention.

[0025] Wherein: 1 - liquid cavity pressure sensor, 2 - liquid cavity nozzle, 3 - liquid cavity end cover, 4 - third sealing groove, 5 - first sealing member, 6 - cylinder body, 7 - carbon fiber winding layer, 8 - liquid cavity, 9 - piston, 10 - first piston ring groove, 11 - second piston ring groove, 12 - gas cavity, 13 - second sealing member, 14 - gas cavity nozzle, 15 - gas cavity pressure sensor, 16 - annular convex block, 17 - first connecting portion, 18 - first contact portion, 19 - second connecting portion, 20 - second contact portion, 21 - liquid cavity nozzle interface, 22 - first mounting hole, 23 - fourth connecting portion, 24 - fourth contact portion, 25 - third connecting portion, 26 - third contact portion, 61 - outer cylinder thread section, 62 - small hole, 63 - outer cylinder wall. Detailed Embodiments

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0027] Embodiment 1

[0028] As Figure 1 shown, a accumulator cylinder includes a cylinder body 6. The cylinder body 6 is a cavity structure with one end open. An external cylinder thread section 61 is provided at the open end of the cylinder body 6. The liquid cavity end cover 3 is connected to the cylinder body 6 through the external cylinder thread section 61. A liquid cavity joint communicating with the inside of the cylinder body 6 is provided on the liquid cavity end cover 3. An air cavity joint communicating with the inside of the cylinder body 6 is provided at the bottom end of the cylinder body 6.

[0029] An annular groove is provided on the outer cylinder wall 63 of the cylinder body 6. A carbon fiber winding layer 7 is provided in the annular groove. Annular protrusions 16 are provided on both sides of the annular groove on the outer wall of the cylinder body of the cylinder body 6. The outer diameter of the annular protrusions 16 is greater than the outer diameter of the cylinder body. The total thickness of the cylinder body of the cylinder body 6 after the carbon fiber winding layer 7 is provided is greater than the thickness of other positions of the cylinder body of the cylinder barrel.

[0030] An annular groove is provided on the outer wall of the cylinder body of the cylinder body 6. A carbon fiber winding layer 7 is provided in the annular groove. The annular groove facilitates the winding of the carbon fiber winding layer 7 on the cylinder body 6 and the stability and reliability of the connection of the carbon fiber winding layer 7 on the cylinder body 6. The annular protrusions 16 provide sufficient winding space for the annular groove without increasing the thickness of the cylinder body 6. The carbon fiber winding layer 7 can reduce the deformation in the radial direction of the accumulator, improve the explosion-proof performance of the cylinder body 6, and the carbon fiber winding layer 7 has the advantage of light weight, which can effectively reduce the weight of the cylinder body 6.

[0031] The liquid cavity joint and the liquid cavity end cover 3 are of an integrally formed structure, and the air cavity joint and the cylinder body are of an integrally formed structure, which can effectively reduce stress concentration, reduce the sealing surface, and improve the sealing performance of the accumulator.

[0032] The outer diameter of the liquid cavity end cover 3 is greater than the outer diameter of the cylinder body of the cylinder barrel, so that the end surface of the liquid cavity end cover 3 connected to the cylinder barrel forms an annular limiting end surface on the cylinder body. One end of the carbon fiber winding layer 7 can extend to the position where the limiting end surface is located. When the carbon fiber winding layer 7 is wound, it can be pressed into the contact surface between the liquid cavity end cover 3 and the cylinder body 6 through the small hole 62 at the carbon fiber winding inlet.

[0033] In some embodiments, one end of the carbon fiber winding layer 7 that winds and extends to the limiting end surface is wrapped on the limiting end surface. The carbon fiber winding layer 7 is wound on the cylinder body 6 in an orthogonal 90°. The carbon fiber winding layer 7 bears the radial stress, and the cylinder body 6 bears the axial stress.

[0034] The open end of the cylinder barrel is successively provided with a first connecting portion 17 and a first contacting portion 18 along the direction close to the open end. The outer diameter of the first connecting portion 17 is larger than that of the first contacting portion 18. One end of the liquid chamber end cover 3 is successively provided with a second connecting portion 19 and a second contacting portion 20 that respectively cooperate with the first connecting portion 17 and the first contacting portion 18 along the direction close to the end cover. The first connecting portion 17 and the second connecting portion 19 are threadedly connected, and the outer wall of the first contacting portion 18 is in fit with the inner wall of the second contacting portion 20.

[0035] A groove is formed in the second contacting portion 20, and a first seal 5 is arranged in the groove. When the outer wall of the first contacting portion 18 is in fit with the inner wall of the second contacting portion 20, the first seal 5 can enable the first contacting portion 18 and the second contacting portion 20 to form a sealed fit, enhancing the sealing performance of the liquid chamber end cover 3.

[0036] In some embodiments, the first seal 5 is an O-ring.

[0037] Embodiment 2

[0038] As Figure 1 and Figure 2 shown, a pressure accumulator using the cylinder barrel in the above embodiment is provided. A liquid chamber nozzle 2 is installed in the liquid chamber joint, and a gas chamber nozzle 14 is installed in the gas chamber joint. A first installation hole 22 is formed in the liquid chamber nozzle 2 along its radial direction, and a liquid chamber pressure sensor 1 is threadedly connected to the first installation hole 22. A second installation hole is formed in the gas chamber nozzle 14 along its radial direction, and a gas chamber pressure sensor 15 is threadedly connected to the second installation hole.

[0039] A first installation hole 22 is formed in the liquid chamber nozzle 2 along its radial direction, and a liquid chamber pressure sensor 1 is threadedly connected to the first installation hole 22. A second installation hole is formed in the gas chamber nozzle 14 along its radial direction, and a gas chamber pressure sensor 15 is threadedly connected to the second installation hole. The liquid chamber pressure sensor 1 and the gas chamber pressure sensor 15 can respectively monitor the pressure data of the liquid chamber nozzle 2 and the gas chamber nozzle 14, realizing real-time monitoring of the operation status of the pressure accumulator and ensuring the safety of the operation of the pressure accumulator.

[0040] A third connecting portion 25 and a third contacting portion 26 are successively arranged in both the liquid chamber joint and the gas chamber joint along the direction close to the open end. The inner diameter of the third connecting portion 25 is larger than that of the third contacting portion 26. Fourth connecting portions 23 and fourth contacting portions 24 that respectively cooperate with the third connecting portion 25 and the third contacting portion 26 are arranged on the outer walls of the liquid chamber nozzle 2 and the gas chamber nozzle 14. The third connecting portion 25 and the fourth connecting portion 23 are threadedly connected, and the inner wall of the third contacting portion 26 can be in fit with the outer wall of the fourth contacting portion 24.

[0041] A groove is provided on the fourth contact portion 24, and a second seal 13 is disposed in the groove. When the outer wall of the fourth contact portion 24 fits against the inner wall of the third contact portion 26, the second seal 13 can enable the third contact portion 26 and the fourth contact portion 24 to form a sealed fit, enhancing the sealing performance of the liquid cavity nozzle 2 and the air cavity nozzle 14.

[0042] In some embodiments, the second seal 13 is an O-ring.

[0043] In some embodiments, limit blocks are provided at the ends of the liquid cavity nozzle 2 and the air cavity nozzle 14 located at the fourth connecting portion 23. When the liquid cavity nozzle 2 and the air cavity nozzle 14 are respectively installed in place in the liquid cavity joint and the air cavity joint, the limit blocks just abut against the open ends of the liquid cavity joint and the air cavity joint respectively.

[0044] Embodiment 3

[0045] As Figure 1 and Figure 3 shown, a piston 9 is disposed in the accumulator. A first piston ring groove 10 and a second piston ring groove 11 are provided on the piston 9. The first piston ring groove 10 is disposed at one end close to the liquid cavity nozzle 2, and the second piston ring groove 11 is disposed at one end close to the air cavity nozzle 14.

[0046] The piston 9 divides the cylinder barrel into a liquid cavity 8 and an air cavity 12. The piston 9 is a columnar structure. A groove in the shape of a truncated cone is provided on the side of the piston 9 facing the air cavity 12, and the diameter of the open end of the groove is larger than that of the other end, which helps the gas filled in the air cavity 12 to push the piston 9 to move.

[0047] In some embodiments, the thermal expansion coefficients of the materials of the piston 9 and the cylinder barrel are the same, which can effectively reduce the gap generated between the piston 9 and the barrel body of the cylinder barrel during low-temperature operation, improving the sealing performance of the cylinder barrel.

[0048] A method for processing and forming an accumulator, used for processing and forming the accumulator in the above embodiments, includes the following steps:

[0049] Machine a cylinder body, and machine an annular groove on the outer wall of the barrel body of the cylinder body;

[0050] Install the piston 9 in the cylinder body;

[0051] Install the liquid cavity end cover 3 at the open end of the cylinder body;

[0052] Wind carbon fiber in the annular groove to form a carbon fiber winding layer 7, and wind the carbon fiber to the end face position of the liquid cavity end cover 3 and cover the end face of the liquid cavity end cover 3.

[0053] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It 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. Therefore, it should not be construed as a limitation to the present utility model.

[0054] In addition, when the terms "horizontal" and "vertical" appear in the description of the present utility model, it does not mean that the components are required to be absolutely horizontal or hanging vertically, but they can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and it does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0055] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, if the terms "set", "installed", "connected", "connected" are understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0056] The above are only the preferred embodiments of the present utility model, and do not impose any formal limitations on the present utility model. Any simple modifications and equivalent changes made to the above embodiments based on the technical essence of the present utility model all fall within the protection scope of the present utility model.

Claims

1. An accumulator cylinder, characterized in that, It includes a cylinder body (6), the cylinder body (6) is a cavity structure with one end open, the open end of the cylinder body (6) is threadedly connected with a liquid cavity end cover (3), a liquid cavity joint communicating with the inside of the cylinder body (6) is arranged on the liquid cavity end cover (3), and an air cavity joint communicating with the inside of the cylinder body (6) is arranged at the bottom end of the cylinder body (6); An annular groove is arranged on the outer wall of the barrel body of the cylinder body (6), a carbon fiber winding layer (7) is arranged in the annular groove, annular convex blocks (16) are arranged on the outer wall of the barrel body of the cylinder body (6) on both sides of the annular groove, and the outer diameter of the annular convex blocks (16) is larger than the outer diameter of the barrel body.

2. The accumulator cylinder according to claim 1, characterized in that, The total thickness of the barrel body of the cylinder body (6) after the carbon fiber winding layer (7) is arranged is greater than the thickness of other positions of the barrel body of the cylinder body (6).

3. The accumulator cylinder according to claim 1, characterized in that, The outer diameter of the liquid cavity end cover (3) is larger than the outer diameter of the barrel body, so that the end face of the end of the liquid cavity end cover (3) connected to the cylinder body (6) forms an annular limiting end face on the cylinder body; One end of the carbon fiber winding layer (7) winds and extends to the position where the limiting end face is located. When the carbon fiber winding layer (7) is wound, it can be pressed into the contact surface between the liquid cavity end cover (3) and the cylinder body (6) through the small hole (62) at the carbon fiber winding inlet.

4. The accumulator cylinder according to claim 3, characterized in that, One end of the carbon fiber winding layer (7) winds and extends to the limiting end face and covers the limiting end face. The carbon fiber winding layer (7) is wound on the cylinder body (6) at 90° orthogonally, so that the carbon fiber winding layer (7) bears the radial stress and the cylinder body (6) bears the axial stress.

5. The accumulator cylinder according to claim 1, characterized in that, The open end of the cylinder body (6) is sequentially provided with a first connecting part (17) and a first contacting part (18) along the direction close to the open end. The outer diameter of the first connecting part (17) is larger than the outer diameter of the first contacting part (18). One end of the liquid cavity end cover (3) is sequentially provided with a second connecting part (19) and a second contacting part (20) that cooperate with the first connecting part (17) and the first contacting part (18) respectively along the direction close to the end cover. The first connecting part (17) and the second connecting part (19) are threadedly connected, and the outer wall of the first contacting part (18) fits with the inner wall of the second contacting part (20).

6. The accumulator cylinder according to claim 5, characterized in that, A first sealing member (5) is arranged between the second contacting part (20) and the first contacting part (18).

7. The accumulator cylinder according to claim 1, characterized in that, The liquid cavity joint and the liquid cavity end cover (3) are of an integrally formed structure, and the air cavity joint and the cylinder body (6) are of an integrally formed structure.

8. A pressure accumulator, characterized in that, The accumulator cylinder barrel according to any one of claims 1-7 is adopted.

9. The accumulator according to claim 8, characterized in that, A liquid cavity nozzle (2) is installed in the liquid cavity joint, an air cavity nozzle (14) is installed in the air cavity joint. A first installation hole (22) is opened in the radial direction of the liquid cavity nozzle (2), and a liquid cavity pressure sensor (1) is threadedly connected to the first installation hole (22). A second installation hole is opened in the radial direction of the air cavity nozzle (14), and an air cavity pressure sensor (15) is threadedly connected to the second installation hole.

10. The accumulator according to claim 8, characterized in that, A third connecting portion (25) and a third contacting portion (26) are sequentially arranged in the liquid cavity joint and the air cavity joint along the direction close to the opening end. The inner diameter of the third connecting portion (25) is larger than that of the third contacting portion (26). A fourth connecting portion (23) and a fourth contacting portion (24) which are respectively matched with the third connecting portion (25) and the third contacting portion (26) are arranged on the outer walls of the liquid cavity nozzle (2) and the air cavity nozzle (14). The third connecting portion (25) and the fourth connecting portion (23) are threadedly connected, and the inner wall of the third contacting portion (26) can be attached to the outer wall of the fourth contacting portion (24).

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