Anti-impact oil pipe flange suitable for high pressure
By adopting a double sealing structure at the flange connection of the hydraulic cylinder, including a plane sealing groove and an axial sealing groove, combined with the design of the O-ring and retaining ring, the oil leakage problem of the hydraulic cylinder under high pressure and impact conditions is solved, and efficient sealing is achieved.
Patent Information
- Application Number
- CN202422287939.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-19
AI Technical Summary
The flange connections of existing hydraulic cylinders are prone to oil leakage under high pressure and impact conditions, especially the sealing failure of the oil pipe and flange joints, resulting in hydraulic oil leakage.
A double seal structure is adopted, including a planar seal groove and an axial seal groove, and the first O-ring, second O-ring and retaining ring are respectively arranged. Combined with the design of the flange core and flange buckle, sealing is achieved through the tightening of the screw hole and the convex ring.
It effectively improves the sealing effect and reduces the risk of oil leakage. It is suitable for oil circuit sealing under high pressure and impact conditions. It has a simple structure and low cost.
Smart Images
Figure CN223165230U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic cylinder sealing, in particular to a tubing flange applicable to high pressure and shock resistance. Background Art
[0002] The force transmitted by a hydraulic cylinder is generated by hydraulic oil based on "Pascal's law", that is, liquid can transmit pressure. When we need a hydraulic cylinder to generate a very large force, it is necessary to pressurize the liquid in the hydraulic cylinder, and the liquid in the hydraulic cylinder is provided by a hydraulic station. The hydraulic oil is transported between the hydraulic station and the hydraulic cylinder through a tubing. The tubing and the cylinder are connected by a flange and fixed with bolts. However, 90% of the tubing oil leakage accidents still occur at the joint of the tubing and the flange. Although the current ordinary welded flange joint can prevent oil leakage accidents, it only has one seal and is an end face seal. Due to the gaps in the screw holes, under the instantaneous impact of high-pressure oil, the flange will vibrate or even shift, resulting in the sealing failure of the seal and oil leakage. It is not suitable for high-pressure and impact oil circuits. Summary of the Invention
[0003] The purpose of the utility model is to solve the problems existing in the prior art, and to provide a tubing flange applicable to high pressure and shock resistance, which can effectively solve the problem of hydraulic oil leakage at the connection between the flange and the cylinder, and is especially applicable to high-pressure impact oil circuits.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A tubing flange applicable to high pressure and shock resistance includes a flange core and a flange buckle. The flange core penetrates through the flange buckle. The flange core includes an upper flange core and a lower flange core. A first convex ring is arranged at the bottom end of the upper flange core, and a flat sealing groove is arranged on the lower end face of the first convex ring. The lower flange core is fixedly connected to the bottom end of the first convex ring. The lower flange core is provided with an axial sealing groove in the axial direction. Sealing materials are arranged in the flat sealing groove and the axial sealing groove.
[0006] Preferably, a plurality of screw holes are arranged on the flange buckle in a circumferential manner. A first concave ring is arranged at the lower end inside the flange buckle, and the first concave ring is matched with the first convex ring for fastening.
[0007] Preferably, a first O-ring is arranged in the flat sealing groove, and a second O-ring and a retaining ring are arranged in the axial sealing groove.
[0008] Preferably, the retaining ring is above the second O-ring.
[0009] Preferably, a flange core flange is arranged on the end face of the lower flange core away from the first convex ring.
[0010] Preferably, a groove is provided on the upper flange core away from the end face of the first convex ring.
[0011] Compared with the existing technology, the present utility model provides an oil pipe flange applicable to high pressure and impact resistance, and the advantages are as follows:
[0012] 1. Simple structure and low cost;
[0013] 2. Good sealing effect. Through plane sealing and axial sealing, the sealing effect is better and the risk of oil leakage is low;
[0014] 3. Wide applicability and can be applicable to various sealing structures. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic cross-sectional view of the flange core structure in the present utility model;
[0016] Figure 2 It is a schematic cross-sectional view of the flange buckle structure in the present utility model;
[0017] Figure 3 It is a schematic cross-sectional view of the assembly of the flange core and the flange buckle;
[0018] Figure 4 It is Figure 3 an enlarged view of part A in
[0019] Figure 5 It is a schematic assembly view of the present utility model.
[0020] In the figure: 1. Upper flange core, 2. Lower flange core, 3. Flange buckle, 4. First convex ring, 5. Plane sealing groove, 6. Axial sealing groove, 7. Screw hole, 8. First concave ring, 9. First O-ring, 10. Second O-ring, 11. Retaining ring, 12. Flange core flange, 13. Groove, 14. Oil pipe, 15. Oil cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "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. 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. At the same time, the terms "first", "second", etc. are only used to distinguish the names of each component and do not have a primary or secondary relationship. Therefore, it should not be construed as a limitation to the present utility model.
[0023] Embodiment 1, as Figure 1 、 Figure 2 and Figure 3 shown, a tubing flange applicable to high pressure and shock resistance includes a flange core and a flange buckle 3. The flange core penetrates through the flange buckle. The flange core includes an upper flange core 1 and a lower flange core 2. A first convex ring 4 is provided at the bottom end of the upper flange core 1. A flat sealing groove 5 is provided on the lower end face of the first convex ring. The lower flange core 2 is fixedly connected to the bottom end of the first convex ring 4. An axial sealing groove 6 is provided in the lower flange core 2 along the axial direction. A sealing material is provided in the flat sealing groove and the axial sealing groove.
[0024] Through the setting of the structure and the sealing of the sealing material, the oil in the oil cylinder can be well sealed, reducing the risk of high-pressure oil leakage.
[0025] Embodiment 2, please continue to refer to Figure 2 and Figure 3 , a plurality of screw holes 7 are provided on the upper ring of the flange buckle 3. A first concave ring 8 is provided at the lower end inside the flange buckle 3. The first concave ring 8 and the first convex ring 4 are matched and fastened.
[0026] In this embodiment, the flange buckle 3 is connected to the oil cylinder by screws. A spring washer is provided at the upper end of the screw and the flange buckle 3 to prevent the screw from loosening.
[0027] The height of the first convex ring 4 is the same as the height of the first concave ring 8. Through the use of screws, the first convex ring 4 and the first concave ring 8 are closely matched, and the flange buckle 3 plays a role in pressing and fixing the flange core.
[0028] Please continue to refer to Figure 4 , a first O-ring 9 is provided in the flat sealing groove 5, and a second O-ring 10 and a retaining ring 11 are provided in the axial sealing groove 6.
[0029] The retaining ring 11 is above the second O-ring 10.
[0030] The retaining ring plays an axial limiting role, which can prevent the second O-ring 10 from axially moving, and can avoid the damage of the second O-ring 10 under high pressure.
[0031] Through the settings of the first O-ring 9, the second O-ring 10 and the retaining ring 11, the sealing effect is better and the risk of oil leakage is low.
[0032] A flange core flange 12 is provided on the lower flange core away from the end face of the first convex ring.
[0033] The flange core flange 12 is inserted into the inside of the oil port of the oil cylinder (see Figure 5 ), and there is a tolerance fit between the flange core flange and the oil port, which can play a guiding role and can solve the jitter caused by the impact of high-pressure oil, and reduce the risk of oil leakage caused by the impact of pressure oil.
[0034] A groove 13 is provided on the upper flange core away from the end face of the first convex ring. The setting of the groove 13 is to form a weld with the groove at the end of the oil pipe 14 when welding with the oil pipe.
[0035] When the present utility model is in use, it includes the following steps:
[0036] Step 1: First, install the first O-ring 9 in the plane sealing groove 5, and then install the second O-ring 10 and the retaining ring 11 in the axial sealing groove 6;
[0037] Step 2: Insert the lower end of the flange core with the seal installed into the oil port of the oil cylinder 15;
[0038] Step 3: Then buckle the flange on the flange core, and use screws to fix the flange and the flange core on the oil cylinder 15;
[0039] Step 4: Finally, weld the groove at the end face of the flange core with the oil pipe 14.
[0040] When the oil cylinder 15 moves, when the pressure of the injected hydraulic oil is increased, a gap will be generated between the flange and the oil cylinder 15, and the hydraulic oil will flow out from this gap, squeezing the second O-ring 10 and the retaining ring 11, so that the second O-ring 10 squeezes the retaining ring 11, and the second O-ring 10 and the retaining ring 11 are in close contact with the axial sealing groove 6, thus forming a good seal. Coupled with the blockage of the first O-ring 9 in the plane sealing groove 5, even if the pressure is increased again, it can ensure the close fit between the sealing material and the flange and the oil cylinder 15, so as to achieve a good sealing effect.
[0041] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent replacements or changes, and should be covered within the protection scope of the present utility model.
Claims
1. A tubing flange applicable to high pressure and shock-proof, characterized in that: The invention comprises a flange core and a flange buckle (3), wherein the flange core passes through the flange buckle, and the flange core comprises an upper flange core (1) and a lower flange core (2). The bottom end of the upper flange core (1) is provided with a first convex ring (4), and the lower end surface of the first convex ring (4) is provided with a planar sealing groove (5). The lower flange core (2) is fixed to the bottom end of the first convex ring (4), and the lower flange core (2) is provided with an axial sealing groove (6) along the axial direction. Sealing material is provided in the planar sealing groove (5) and the axial sealing groove (6).
2. The high-pressure and impact-resistant tubing flange according to claim 1, wherein: The upper ring of the flange buckle (3) is provided with a plurality of screw holes (7), and the lower end of the interior of the flange buckle (3) is provided with a first concave ring (8), and the first concave ring (8) and the first convex ring (4) are matched and fastened.
3. The tubing flange applicable to high pressure and shockproof according to claim 1, characterized in that: A first O-ring (9) is provided in the planar sealing groove (5), and a second O-ring (10) and a retaining ring (11) are provided in the axial sealing groove (6).
4. The high-pressure and impact-resistant tubing flange according to claim 3, wherein: The retaining ring (11) is above the second O-ring (10).
5. A tubing flange applicable to high pressure and shock-proof, as claimed in claim 1, wherein: The lower flange core is provided with a flange core flange (12) away from the first convex ring end surface.
6. The tubing flange applicable to high pressure and shockproof according to claim 1, characterized in that: The upper flange core is provided with a groove (13) away from the first convex ring end surface.