Four side pressurized sealed high pressure resistant sealed ring possessing framework

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] A four-sided pressure-sealed high-pressure-resistant sealing ring with a skeleton, which is formed by laminating and winding a long skeleton 1 with a width of not less than 10mm and a long flexible sealing material 2, and on both ends of the wound annular ring And the outer and inner circular surfaces are provided with cladding layer 3, its compressive strength is between 200MPa ~ 480MPa, such as figure 1 shown. During specific implementation, the skeleton 1 can be one or a combination of flat plates, corrugated plates, toothed plates or arc-shaped plates, wherein figure 1 The corrugated plate shape shown has the best compressive strength, and the skeleton 1 of the corresponding shape can be selected according to the maximum pressure surface borne by the sealing ring in the actual implementation. When the main direction of force is the end face, the skeleton can also be used Curved plate structure, the material of the frame can be a metal frame or a high-strength organic material frame. During specific manufacturing, the skeleton and the sealing filler in the middle, that is, the sealing material, should be laminated and then wound to form. The flexible sealing material 2 can be made of flexible graphite material or other materials with good formability and high compressive strength, such as pressure modified Rubber, polyester material, etc. The cladding layer 3 is preferably made of rubber or titanium fiber braids, and flexible graphite strips can also be used for cladding, and other polymer materials such as carbon fibers, high-strength glass fiber braids, etc. can also be used as cladding layer 3 materials. . During specific implementation, the height H of the strip skeleton 1 and the strip flexible sealing material 2 can be selected according to the sealing space and the required compressive strength, preferably not less than 10 mm, and its maximum width should be controlled within 50 mm and greater than 50 mm The difficulty and cost of its manufacture will be greatly increased. According to the experimental verification, the width of the framework is best between 25-50. The sealing ring made of the framework within this size range can withstand a pressure of more than 480MPa.

[0022] figure 2 It is a specific application example of the present invention. figure 2 The sealing ring in the rotary compensator requires four-sided sealing and high pressure resistance. After adopting the sealing ring with a thickness of 25 mm in the present invention, it is tested that when the internal pressure of the pipeline increases to 480 MPa, the inner pipe and the outer pipe make a relative rotation of 10000 After several times (standard value), there is still no leakage. After the pressure is released, the surface of the sealing ring is not damaged, but the sealing ring of the ordinary structure will leak and brittle when it is pressurized to 10MPa. After analysis, it is believed that this is due to the skeleton and package. The result of the joint action of the cladding.

[0023] The sealing ring of the present invention can be used not only in the petrochemical industry, the electric power industry, but also in similar relative motion peripheral sealing occasions with high pressure requirements.

[0024] The parts not involved in the present invention are the same as the prior art or can be realized by adopting the prior art.