Guide and anti-collision integrated compression piston
By integrating a non-metallic structural layer on the compressed piston, the problem of complex processing and piston collision deformation in the prior art is solved, and higher operating accuracy and sealing performance are achieved, and stable performance is provided in low temperature and high pressure environments.
Patent Information
- Application Number
- CN202420925454.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-29
AI Technical Summary
In the existing LNG booster pump, the outside of the compression piston in the compression cylinder needs to be equipped with a separate sealing ring and guide belt, which is complicated in processing technology, and the end of the piston is prone to collide with the inner wall of the compression cylinder, resulting in deformation and degradation of sealing performance.
Design a compression piston with integrated guide and anti-collision. The outer surface of the piston body is equipped with a sealing ring, and a non-metallic structural layer is provided on the end surface and side surface, including an anti-collision portion and a guide portion, which is combined with the piston body by vulcanization or injection molding. Connect, integrate collision avoidance and guidance.
The processing technology is simplified, the piston ends are collision and deformation, the operating accuracy and sealing performance are improved, and the compression and corrosion resistance are shown in low-temperature and high-pressure environments.
Smart Images
Figure CN222185045U_ABST
Abstract
Description
Technical field:
[0001] The utility model relates to the technical field of compression pistons, in particular to a compression piston with integrated guidance and anti-collision capabilities. Background technology:
[0002] The existing LNG booster pump has a structure such as the patent application with publication number CN110185598A, which discloses a vehicle-use low-temperature natural gas bottle built-in booster pump. When working, the compression cylinder is inserted into the LNG bottle, and the hydraulic cylinder is located outside the LNG bottle. The cylinder piston in the hydraulic cylinder reciprocates under the push of the hydraulic oil, and the cylinder piston drives the piston rod to reciprocate, and the piston rod drives the compression piston in the compression cylinder to reciprocate, so that the low-temperature liquid enters the compression cylinder through the liquid inlet valve, and then is discharged from the liquid outlet valve to the outside, so as to achieve the pressurization of the low-temperature liquid. Among them, the compression piston in the compression cylinder now needs to be sealed on its outer side with several sealing rings, and a guide belt needs to be separately set to guide the reciprocating motion of the compression piston, and the processing technology is complicated. In addition, in actual work, when the compression piston compresses and pressurizes the liquid, its end is easy to collide with the inner wall of the end of the compression cylinder, causing the compression piston to deform, affecting its running accuracy, and the sealing performance will also be affected.
[0003] In summary, the compression piston problem of the cold-end compression cylinder of the LNG booster pump has become a technical problem that urgently needs to be solved in the industry. Utility model content:
[0004] The utility model provides a compression piston with integrated guide and collision protection to overcome the problems of complicated processing technology of the previous compression piston guide belt being set separately and the end portion being easy to collide and deform with the inner wall of the compression cylinder end portion.
[0005] The technical solution adopted by the utility model to solve the above technical problems is:
[0006] A compression piston with integrated guidance and collision prevention comprises a piston body, the outer surface of which is provided with a plurality of sealing rings, one end of the piston body is connected to a piston rod, and the end face and side surface of the other end of the piston body are provided with an integrally formed non-metallic structural layer, the non-metallic structural layer comprises an anti-collision portion on the end face and a guiding portion on the side surface, the anti-collision portion is used to prevent the piston body from colliding with a compression cylinder, and the guiding portion is used to guide the reciprocating motion of the piston body.
[0007] The non-metallic structural layer is compositely connected to the piston body by vulcanization or injection molding.
[0008] The end surface of the piston body away from the piston rod is a conical surface, and the anti-collision part is a conical body matched with the conical surface.
[0009] The outer surface of the guide portion is slightly higher than the outer surface of the piston body.
[0010] The utility model adopts the above scheme and has the following advantages:
[0011] An integrally formed non-metallic structural layer is provided on the end face and side face of the piston body at one end away from the piston rod. The non-metallic structural layer includes an anti-collision portion on the end face and a guide portion on the side face, thereby integrating anti-collision and guidance into one. This can not only solve the guidance problem of the piston body and make the processing technology simpler, but also solve the end anti-collision problem of the piston body, thereby protecting the piston body, avoiding collision and deformation of the piston body, and ensuring the operating accuracy and sealing performance of the piston body. The non-metallic structural layer is made of PTFE or PCTFE material, which is resistant to pressure and low temperature, has strong corrosion resistance, and has more stable and reliable performance under low temperature and high pressure environment. Description of the drawings:
[0012] Figure 1 It is a cross-sectional structural schematic diagram of the utility model.
[0013] In the figure, 1. piston body, 2. sealing ring, 3. piston rod, 4. anti-collision part, 5. guide part, 6. dovetail groove structure. Specific implementation method:
[0014] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.
[0015] like Figure 1 As shown, a compression piston with integrated guidance and collision prevention includes a piston body 1, a plurality of sealing rings 2 are provided on the outer surface of the piston body 1, one end of the piston body 1 is connected to a piston rod 3, and the end face and side surface of the other end of the piston body 1 are provided with an integrally formed non-metallic structural layer, the non-metallic structural layer includes an anti-collision portion 4 on the end face and a guide portion 5 on the side face, the anti-collision portion 4 is used to prevent the piston body 1 from colliding with the compression cylinder, and the guide portion 5 is used to guide the reciprocating motion of the piston body 1.
[0016] The non-metallic structural layer includes a PTFE or PCTFE structural layer, which is resistant to pressure and low temperature, has strong anti-corrosion ability, and has more stable and reliable performance under low temperature and high pressure environment.
[0017] The non-metallic structural layer is compositely connected to the piston body 1 by vulcanization or injection molding, which has a simple process, a firm connection, and is not easy to fall off.
[0018] The end surface of the piston body 1 away from the piston rod 3 is a conical surface, and the anti-collision part 4 is a conical body matched with the conical surface and matched with the shape of the inner wall of the compression cylinder.
[0019] The anti-collision portion 4 and the guide portion 5 are connected to the piston body 1 via a dovetail groove structure 6, which can increase the connection strength.
[0020] The outer surface of the guide portion 5 is slightly higher than the outer surface of the piston body 1 , and plays a guiding role in the reciprocating motion of the piston body 1 .
[0021] Working principle:
[0022] In the process of the piston rod 3 driving the piston body 1 to reciprocate, on the one hand, the guide portion 5 can replace the previous guide belt to guide the reciprocating motion of the piston body 1. On the other hand, the anti-collision portion 4 is arranged at the front end of the piston body 1, which can prevent the piston body 1 from directly colliding with the inner wall of the compression cylinder, thereby protecting the piston body 1, avoiding collision and deformation of the piston body 1, and ensuring the operating accuracy of the piston body 1 and the sealing performance of the sealing ring 2.
[0023] The above-mentioned specific implementation manner cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or change made to the implementation manner of the present utility model falls within the protection scope of the present utility model.
[0024] The matters not described in detail in the present invention are all known technologies to those skilled in the art.
Claims
1. A compression piston with integrated guidance and anti-collision, comprising a piston body, a plurality of sealing rings are arranged on the outer surface of the piston body, one end of the piston body is connected to a piston rod, and is characterized in that: The end face and side surface of the other end of the piston body are provided with an integrally formed non-metallic structural layer, and the non-metallic structural layer includes an anti-collision portion on the end face and a guide portion on the side surface, the anti-collision portion is used to prevent the piston body from colliding with the compression cylinder, and the guide portion is used to guide the reciprocating motion of the piston body.
2. A compression piston with integrated guidance and collision protection according to claim 1, characterized in that: The non-metallic structural layer is compositely connected to the piston body by vulcanization or injection molding.
3. A compression piston with integrated guidance and collision protection according to claim 1, characterized in that: The end surface of the piston body away from the piston rod is a conical surface, and the anti-collision part is a conical body matched with the conical surface.
4. A compression piston with integrated guidance and collision prevention according to claim 1, characterized in that: The outer surface of the guide portion is slightly higher than the outer surface of the piston body.