Piston sealing device
By setting a detachable multi-layer sealing assembly and inner sealing ring between the piston cylinder flange and the piston rod support flange, the problem of poor piston sealing performance is solved, and the sealing performance and measurement accuracy of the piston standard are improved.
Patent Information
- Application Number
- CN202422633795.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-10-30
AI Technical Summary
The sealing performance of existing piston sealing devices is poor, which affects the measurement accuracy and use effect of the piston standard.
A piston sealing device is designed, by providing a detachable sealing assembly between the piston cylinder flange and the piston rod support flange, including a multi-layer seal and an inner seal ring, to achieve tightening and extrusion deformation of the sealing member by bolted connections to improve sealing performance.
It improves the sealing performance of the piston standard device, ensures the measurement accuracy and reliability of the flowmeter, and extends the service life of the equipment.
Smart Images
Figure CN223190992U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pistons, in particular to a piston sealing device. Background Art
[0002] In the fluid (such as oil) pipeline transportation industry, flow meters are often used to measure flow rate. In order to ensure the accuracy of the flow meter, it is necessary to calibrate the flow meter regularly, and a calibration reference must be used when calibrating the flow meter. The piston-type standard volume tube has become the most commonly used calibration reference due to its advantages such as high measurement accuracy, wide measurement range, small size and small site occupation. In the prior art, the sealing of the piston is generally achieved by setting one or several sealing rings, which has poor sealing performance and affects the sealing performance of the entire piston standard. Utility Model Content
[0003] In order to overcome the above-mentioned defects of the prior art, the utility model provides a piston sealing device to solve the problems raised in the background technology and improve the sealing performance of the piston standard.
[0004] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a piston sealing device, including a sealing assembly arranged between a piston cylinder flange and a piston rod support flange, wherein the piston cylinder flange and the piston rod support flange are detachably connected by bolts, and the sealing assembly includes a first seal, the inner ring of the first seal cooperates with the piston rod, and a first groove cooperating with the first seal is provided on the piston cylinder flange, one side of the first seal cooperates with the first groove, and the other side of the first seal is in contact with the side wall of the piston rod support flange.
[0005] Furthermore, the first sealing member is provided with a second groove at one end of the first groove, a second sealing member is provided in the second groove, and a width of the second sealing member is greater than a depth of the second groove.
[0006] Furthermore, a third groove is provided at the bottom of the first sealing member, and a third sealing member is fitted in the third groove.
[0007] Furthermore, the third sealing member includes a third sealing member body, an upper left protrusion is provided on the upper left side of the third sealing member body, a lower left protrusion is provided on the lower left side of the third sealing member body, and a separation groove is provided between the lower left protrusion and the upper left protrusion.
[0008] Furthermore, the lowest point of the lower left protrusion is lower than the lower side wall of the third sealing body, and the highest point of the upper left protrusion is higher than the upper side wall of the third sealing body.
[0009] Furthermore, an inner sealing ring is provided between the piston rod supporting flange and the piston rod.
[0010] Compared with the prior art, the beneficial effects of the present invention are:
[0011] By setting the piston cylinder flange and the piston rod support flange, the sealing component can be installed. The piston cylinder flange and the piston rod support flange are detachably connected, which can clamp the sealing component and improve the sealing performance;
[0012] By setting up the second sealing part, it is squeezed and deformed after installation, which makes it fit better and improves the sealing performance;
[0013] The sealing performance of the piston is ensured by arranging an inner sealing ring and cooperating with a sealing component. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the utility model;
[0015] Figure 2 This is a schematic cross-sectional view of an embodiment of the present invention;
[0016] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of A in the figure.
[0017] Figure 4 It is a schematic diagram of the enlarged cross-sectional structure of the third sealing component. DETAILED DESCRIPTION
[0018] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The embodiments of the present invention are described below in conjunction with the drawings.
[0019] like Figure 1-4 As shown, a piston sealing device includes a sealing assembly disposed between a piston cylinder flange 3 and a piston rod support flange 4. The piston cylinder flange 3 and the piston rod support flange 4 are detachably connected by bolts 17. The sealing assembly includes a first sealing member 10. The inner ring of the first sealing member 10 cooperates with the piston rod 2. The piston cylinder flange 3 is provided with a first groove that cooperates with the first sealing member 10. One side of the first sealing member 10 cooperates with the first groove, and the other side of the first sealing member 10 is in contact with the side wall of the piston rod support flange 4.
[0020] The piston cylinder flange 3 is provided at the end of the piston cylinder 1, and the piston rod support flange 4 is used to support the piston rod 2. The piston rod 2 passes through the piston rod support flange 4 and enters the piston cylinder 1. A fixing frame 6 is provided at the end of the support frame 9. A plurality of sliding rods 7 are provided between the fixing frame 6 and the piston rod support flange 4 to support the movement of the movable support 5 connected to the end of the piston rod 2. The threaded rod is driven to rotate by the motor 8. The movable support 5 is threadedly connected to the threaded rod, thereby driving the extension and retraction of the piston rod 2.
[0021] The piston cylinder flange 3 and the piston rod support flange 4 are connected by bolts 17. After the sealing assembly is installed, the bolts 17 are tightened. The force between the piston cylinder flange 3 and the piston rod support flange 4 compresses the sealing assembly, thereby maintaining good sealing performance. Through the force between the two, the first sealing member 10 can be made of rubber material, which has elasticity itself. After being subjected to force, it can fill the entire first groove, thereby improving the sealing performance.
[0022] The first sealing member 10 is provided with a second groove at one end of the first groove, and a second sealing member 11 is provided in the second groove. The width of the second sealing member 11 is greater than the depth of the second groove. When tightening the bolt 17, the second sealing member 11 is compressed under the force, so that it fits tightly with the second groove and the bottom of the first groove to ensure sealing performance.
[0023] A third groove is provided at the bottom of the first sealing member 10, in which a third sealing member 12 is provided. The provision of the third sealing member 12 can improve the sealing performance.
[0024] The third sealing member 12 includes a third sealing member body 14. An upper left protrusion 16 is provided on the upper left side of the third sealing member body 14. A lower left protrusion 15 is provided on the lower left side of the third sealing member body 14. A separation groove 18 is provided between the lower left protrusion 15 and the upper left protrusion 16. When a force is applied, the separation groove 18 will open, allowing the lower left protrusion 15 to fit against the outer wall of the piston rod 2, thereby ensuring sealing performance.
[0025] The lowest point of the left lower protrusion 15 is lower than the lower side wall of the third sealing body 14 , and the highest point of the left upper protrusion 16 is higher than the upper side wall of the third sealing body 14 ;
[0026] An inner sealing ring 13 is provided between the piston rod support flange 4 and the piston rod 2, and the inner sealing ring 13 cooperates with the sealing assembly to ensure sealing performance;
[0027] By providing the piston cylinder flange 3 and the piston rod support flange 4, the sealing assembly can be installed. The piston cylinder flange 3 and the piston rod support flange 4 are detachably connected, and the sealing assembly can be clamped to improve the sealing performance.
[0028] By providing the second sealing member 11, it is deformed by force after installation, which allows for better fit and improved sealing performance.
[0029] The inner sealing ring 13 is provided in conjunction with the sealing assembly to ensure the sealing performance of the piston.
[0030] The above describes the technical solution of the present invention in conjunction with specific embodiments. However, it should be noted that the above description is only for the purpose of explaining the solution of the present invention and should not be construed in any way as a specific limitation on the scope of protection of the utility model. Based on the explanations herein, those skilled in the art can conceive of other specific embodiments of the present invention or equivalent replacements without inventive effort, and all such replacements will fall within the scope of protection of the present invention.
Claims
1. A piston sealing device, characterized in that: The invention comprises a sealing assembly arranged between a piston cylinder flange (3) and a piston rod support flange (4), wherein the piston cylinder flange (3) and the piston rod support flange (4) are detachably connected via bolts (17), wherein the sealing assembly comprises a first sealing member (10), wherein the inner ring of the first sealing member (10) cooperates with the piston rod (2), and wherein a first groove cooperating with the first sealing member (10) is provided on the piston cylinder flange (3), wherein one side of the first sealing member (10) cooperates with the first groove, and the other side of the first sealing member (10) is in contact with the side wall of the piston rod support flange (4).
2. The piston sealing device according to claim 1, characterized in that: The first sealing member (10) is provided with a second groove at one end of the first groove, a second sealing member (11) is provided in the second groove, and the width of the second sealing member (11) is greater than the depth of the second groove.
3. The piston sealing device according to claim 1, characterized in that: A third groove is provided at the bottom of the first sealing member (10), and a third sealing member (12) is fitted in the third groove.
4. The piston sealing device according to claim 3, characterized in that: The third sealing member (12) comprises a third sealing member body (14), an upper left protrusion (16) is provided at the upper left of the third sealing member body (14), a lower left protrusion (15) is provided at the lower left of the third sealing member body (14), and a separation groove (18) is provided between the lower left protrusion (15) and the upper left protrusion (16).
5. The piston sealing device according to claim 4, characterized in that: The lowest point of the lower left protrusion (15) is lower than the lower side wall of the third sealing body (14), and the highest point of the upper left protrusion (16) is higher than the upper side wall of the third sealing body (14).
6. The piston sealing device according to claim 1, characterized in that: An inner sealing ring (13) is provided between the piston rod supporting flange (4) and the piston rod (2).