Rubber sealing device for isostatic high pressure
By installing a polyurethane sealing ring on the rubber hose and combining it with a metal flange groove design, the problem of easy leakage of rubber hose seals under high pressure is solved, achieving a highly efficient high-pressure sealing effect and a long-life sealing device.
Patent Information
- Application Number
- CN202423062615.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-12
AI Technical Summary
Existing rubber hose end-face sealing methods are prone to leakage under high pressure. The sealing effect is affected by the hardness of the rubber and the uniformity of flange fastening, which leads to seal failure during high-pressure molding. Furthermore, replacement costs are high and disassembly and assembly are time-consuming.
It adopts a combination structure of metal flange and sealing element. The sealing element consists of rubber tube and polyurethane sealing ring. The polyurethane sealing ring is set on the upper and lower sides of the rubber round edge. Combined with the groove design on the metal flange, high pressure leakage is achieved by compressing the polyurethane sealing ring.
It improves the pressure resistance and lifespan of the sealing device, effectively resists isostatic pressing pressure above 30 MPa, avoids seal failure, and reduces the time and cost of replacement and disassembly.
Smart Images
Figure CN223677003U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sealing technical field, concretely relates to a rubber sealing device for isostatic high pressure. BACKGROUND
[0002] The existing scheme: the general common elastic medium for filling powder isostatic compression to make die pressing pipe material is rubber pipe, the rubber pipe two ends utilize flanging or directly make end face sealing pad, then by port flange lockup forms the mode of pressurized liquid leak stoppage.
[0003] The main defect is that: the above-mentioned rubber pipe two end sealing mode is limited by the hardness of rubber pipe, aging, and the uniformity of end face flange lockup, the sealing effect of pressurized forming is affected by the pressing force, especially the sealing effect when the forming pressure exceeds 30Mpa.
[0004] The old type high pressure forming seal only simply utilizes the elastic compression of rubber pipe to seal, the rubber pipe often exists uneven wall thickness, uneven compression, and the sealing compression is too large or insufficient, which causes leakage under high pressure, high replacement cost, and time-consuming and labor-consuming disassembly and assembly. UTILITY MODEL CONTENT
[0005] The utility model relates to a rubber sealing device for isostatic high pressure, which solves the problem of sealing failure caused by the wide hardness range of rubber and long-term aging.
[0006] TECHNICAL SCHEME
[0007] To solve the above problems, the utility model provides the technical scheme:
[0008] A rubber sealing device for isostatic high pressure, comprising a metal flange and a sealing element, the sealing element is installed in the metal flange, the metal flange comprises a flange upper cover and a flange seat, the sealing element is installed between the flange upper cover and the flange seat, the sealing element comprises a rubber pipe and a polyurethane sealing ring, grooves are arranged on the flange upper cover and the flange seat, and the polyurethane sealing ring is installed in the grooves.
[0009] Further, the rubber pipe is composed of a hollow rubber cylinder and a rubber round edge arranged on one side of the rubber cylinder, and the polyurethane sealing ring is arranged on the upper and lower sides of the rubber round edge.
[0010] Further, the polyurethane sealing rings arranged on the upper and lower sides of the rubber round edge are arranged one by one in correspondence.
[0011] Further, the polyurethane sealing ring is in a ring structure, and the ring-shaped polyurethane sealing rings are arranged equidistantly on the upper and lower sides of the rubber round edge.
[0012] Further, the polyurethane sealing ring at different positions has the same height and width.
[0013] Further, the polyurethane sealing ring is a cured gear-shaped sealing ring.
[0014] Further, the rubber tube and the polyurethane sealing ring are pasted into an integrated structure, and the rubber tube and the polyurethane sealing ring are pasted with an adhesive coupling agent.
[0015] Further, the groove width of the groove is 1.2 times greater than the width of the polyurethane sealing ring, and the groove depth is 1 / 2 of the height of the polyurethane sealing ring.
[0016] Further, the groove position is arranged in correspondence with the position of the polyurethane sealing ring.
[0017] Further, the sealing member is composed of the rubber round edge and the polyurethane sealing ring.
[0018] Beneficial effects
[0019] Compared with the prior art, the technical scheme has the following beneficial effects:
[0020] The technical scheme provided by the utility model combines two kinds of sealing media, and provides corresponding sealing groove design relying on material characteristics, strengthens the original conventional sealing mode to form an additive device with higher pressure resistance and longer sealing life, and the effect is remarkable in the application of isostatic pressing molds, especially in application occasions with a forming pressure exceeding 30Mpa.
[0021] The sealing element combined by different materials is matched with the sealing groove as a sealing device, which can effectively and repeatedly form under high pressure for a long time, avoids the time-consuming disassembly and assembly due to sealing failure, and avoids the safety concerns of the operation.
[0022] The pressure resistance of the rubber, the excellent elasticity and sealing effect of the polyurethane resin, the double benefits of pressure resistance and waterproof sealing are combined.
[0023] The manufacturing is simple and the cost is low, but the effect is added, the polyurethane resin has good plastic properties, and the rubber sealing combination can be made according to various sealing requirements. DRAWINGS
[0024] Figure 1 It is a structural schematic view of the utility model embodiment 1;
[0025] Figure 2 It is Figure 1 It is an enlarged schematic view of A in the figure;
[0026] Figure 3 It is an explosion view of the utility model embodiment 1;
[0027] Figure 4 Figure 1 is a top view of the sealing element of the present application installed on the cylindrical round edge of the embodiment 1. DETAILED DESCRIPTION
[0028] In order to make the technical scheme of the present application clearer, the present application will be further described in detail below with reference to the drawings and specific embodiments.
[0029] Embodiment 1
[0030] With reference to the drawings Figures 1-4 A rubber sealing device for isostatic high pressure, comprising a metal flange and a sealing element in the metal flange for sealing effect, the metal flange has a flange cover 3 and a flange seat 4, the sealing element is composed of a rubber tube 1 and a polyurethane sealing ring 2, the sealing element is arranged in the metal flange to play a sealing role, and a high-pressure leakage prevention effect is achieved.
[0031] By utilizing the high-elasticity sealing performance of the polyurethane which can be shaped and adjusted, the sealing ring is combined with the original sealing rubber pad, and by utilizing the design of the sealing groove, the high-pressure sealing effect and service life of the isostatic pressure elastic rubber tube are improved.
[0032] The polyurethane sealing ring 2 and the rubber tube 1 are of an integral structure, the rubber tube 1 is composed of a cylindrical and hollow rubber cylinder 11 and a rubber round edge 12 arranged at one end of the rubber cylinder, the polyurethane sealing ring 2 is arranged on the upper and lower two side surfaces of the rubber round edge 12, the polyurethane sealing ring 2 is distributed in multiple equidistant distributions on the rubber round edge 12, the polyurethane sealing rings 2 on the upper and lower two side surfaces are arranged in one-to-one correspondence in the upper and lower positions, the polyurethane sealing ring 2 is of an annular structure, the polyurethane sealing rings 2 at different positions on the upper and lower two side surfaces of the rubber round edge 12 are of the same height and width, and only the inner diameters of the annular polyurethane sealing rings 2 are different.
[0033] The polyurethane sealing ring 2 is protrusively arranged on the upper and lower two side surfaces of the rubber round edge 12, and can cooperate with the sealing groove 53 arranged on the device to play a better sealing role after the rubber tube 1 is installed on the sealing interface of the device.
[0034] The rubber tube 1 itself has a sealing effect, after the polyurethane sealing ring 2 is arranged on the rubber tube 1, the rubber tube can play a role of effectively resisting the isostatic pressure forming pressure of more than 30Mpa for a long time while having the original sealing effect.
[0035] The polyurethane sealing ring 2 is pasted on the upper and lower side surfaces of the rubber round edge 12, the bonding surface of the polyurethane sealing ring 2 and the bonding surface of the rubber round edge 12 on which the polyurethane sealing ring 2 is pasted are coupled by adhesive coupling agent to fix the polyurethane sealing ring 2 and the rubber round edge 12 as an integral structure.
[0036] The metal flange is provided with a groove 5, and the groove 5 of the metal flange is used to cooperate with the polyurethane sealing ring 2, so that the sealing ring is deformed by extrusion, thereby achieving the sealing effect of the sealing ring.
[0037] The flange upper cover 3 is used to be installed on the flange seat 4, and the flange seat 4 and the flange upper cover 3 are cooperating structures. The flange upper cover 3 is an annular cover, and the flange seat 4 is composed of a hollow cylindrical seat 41 and a cylindrical round edge 42 arranged at the end of the cylindrical seat. When installed, the flange upper cover 3 is directly installed on the flange seat 4. The flange upper cover 3 and the cylindrical round edge 42 are cooperating through the combination of upper and lower. The flange upper cover 3 and the cylindrical round edge 42 are both provided with grooves 5 for installing the polyurethane sealing ring 2, and the groove 5 located on the lower side of the flange upper cover 3 corresponds to the groove 5 located on the upper side of the cylindrical round edge 42, thereby corresponding to the polyurethane sealing ring 2 arranged on the upper and lower sides of the rubber round edge 12.
[0038] The flange seat 4 and the flange upper cover 3 are combined to extrude the sealing ring, and the deformation degree of the sealing ring can be adjusted by adjusting the combined pressure between the flange seat 4 and the flange upper cover 3.
[0039] The grooves 5 located on the flange upper cover 3 and the cylindrical round edge 42 correspond to the size of the polyurethane sealing ring 2. The groove 5 is preferably machined. The groove width of the groove 5 is 1.2 times larger than the width of the polyurethane sealing ring 2, and the groove depth of the groove 5 is 1 / 2 of the height of the polyurethane sealing ring 2. Therefore, when the flange upper cover 3 and the flange seat 4 are combined and locked, the polyurethane sealing ring 2 is deformed by the extrusion of the flange upper cover 3 and the flange seat 4, thereby making the polyurethane sealing ring 2 more effectively achieve the high-pressure leakage stopping effect.
[0040] The sealing ring is inserted into the metal flange, and the rubber cylinder 11 is arranged in the cylindrical seat 41. In other embodiments, the sealing ring can be composed of the rubber round edge 12 and the polyurethane sealing ring 2.
[0041] The rubber pipe 1 is generally thermoplastic rubber, which requires uniform thickness and smooth surface.
[0042] The polyurethane sealing ring 2 is a cured gear-shaped sealing ring, which is a gear-shaped sealing ring. The polyurethane sealing ring 2 is formed by injection molding with a vertical grouting mold. The purpose is to tightly fill the square groove 5 after being compressed by the square groove of the locked flange, thereby achieving complete leakage stopping effect.
[0043] When the rubber pipe 1 and the polyurethane sealing ring 2 are combined to form a rubber sealing group, a layer of adhesive coupling agent must be applied on the rubber pipe first, which can realize the tight adhesion of the rubber pipe and the sealing ring made of cured polyurethane resin.
[0044] The flange groove 5 is made to match the gear-shaped sealing ring of polyurethane resin. The groove width is 1.2 times larger than the sealing ring, and the groove depth is 1 / 2 times of the sealing ring. Thus, when locking, the high-pressure sealing effect can be achieved more effectively.
[0045] The manufacturing steps of the rubber sealing device are as follows:
[0046] 1. A conventional rubber tube 1 is prepared, preferably a flange type rubber tube, the upper and lower sides of which serve as the upper and lower sealing compression surfaces for manufacturing the polyurethane sealing ring 2. An annular polyurethane sealing ring cavity mold is prepared, which can be made of metal steel by turning, and a polyurethane pouring gate is reserved in the mold.
[0047] 2. The completed cavity mold is fixed to the upper and lower sealing compression surfaces of the rubber tube. Before fixing, a layer of adhesive is applied to the upper and lower sides of the rubber tube as a whole or only at the position where the polyurethane sealing ring 2 is located, in order to effectively bond the rubber tube and the polyurethane resin. The adhesive is a glue coupling agent.
[0048] 3. The curing type polyurethane glue resin is uniformly mixed and stirred for about 1 hour.
[0049] 4. The mixed polyurethane glue resin is poured into the cavity through the pouring gate of the cavity mold, and the pouring is ensured to be uniform and full.
[0050] 5. The poured polyurethane glue resin is sealed with a sealing film to firmly encapsulate the mold, and vacuum is extracted inside the sealing film. The polyurethane resin is effectively solidified after static setting for about 8 hours.
[0051] 6. After demolding, the upper and lower sealing compression surfaces of the rubber tube are effectively combined with the polyurethane resin sealing ring to form a combined sealing element.
[0052] 7. A sealing groove 5 conforming to the size of the polyurethane resin sealing ring is turned on the metal flange surface of the original locking rubber tube sealing compression surface.
[0053] 8. The combined sealing element and the locking flange device with the sealing groove 5 are assembled, and the compression amount of the rubber is controlled.
[0054] The rubber sealing device has the rubber sealing of the original upper and lower sealing compression surfaces of the rubber tube, and also has the gap filling and reinforced sealing of the polyurethane resin sealing ring in the locking flange device groove 5. This combined sealing device can effectively resist isostatic pressure forming pressure of 30 Mpa or more for a long time.
[0055] The rubber sealing combination is made according to various sealing requirements by using the good plasticizing characteristics of the polyurethane resin.
[0056] The above-mentioned embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.
Claims
1. A rubber seal for isostatic high pressure, characterized in that The sealing element is installed between the flange upper cover and the flange seat, and comprises a rubber tube and a polyurethane sealing ring.
2. A rubber seal for isostatic high pressure according to claim 1, characterized in that The rubber tube is composed of a hollow rubber cylinder and a rubber round edge arranged on one side of the rubber cylinder.
3. A rubber seal for isostatic high pressure according to claim 2, characterized in that The polyurethane sealing ring is arranged on the upper and lower sides of the rubber round edge.
4. A rubber seal for isostatic high pressure according to claim 2, characterized in that The polyurethane sealing ring is in an annular structure, and the annular polyurethane sealing ring is arranged on the upper and lower sides of the rubber round edge.
5. A rubber seal for isostatic high pressure according to claim 4, characterized in that The height and width of the polyurethane sealing ring at different positions are the same.
6. A rubber seal for isostatic high pressure according to claim 1, characterized in that The polyurethane sealing ring is in a solidified gear shape.
7. A rubber seal for isostatic high pressure according to claim 1, characterized in that The rubber tube and the polyurethane sealing ring are pasted into an integrated structure, and the rubber tube and the polyurethane sealing ring are pasted with an adhesive coupling agent.
8. A rubber seal for isostatic high pressure according to claim 1, characterized in that The groove width of the groove is 1.2 times larger than the width of the polyurethane sealing ring, and the groove depth is 1 / 2 of the height of the polyurethane sealing ring.
9. A rubber seal for isostatic high pressure according to claim 1, characterized in that The groove position corresponds to the position of the polyurethane sealing ring.
10. A rubber seal for isostatic high pressure according to claim 2, characterized in that The sealing element is composed of the rubber round edge and the polyurethane sealing ring.