A combined pressure-bearing device with reliable sealing

Abstract

The present invention provides a reliably sealed combined pressure-bearing device, comprising a cylinder head, a cylinder body, a bolt assembly, an O-ring, an O-type sealing strip, a flap flange I, a transition tube and a flap flange II, wherein the cylinder head is installed below the cylinder head, the cylinder head and the cylinder body are connected and fixed by a bolt assembly and a pre-tightening force is applied to the O-ring; the cylinder body is fixedly connected with a flap flange I and a flap flange II by a bolt assembly below, the two flap mating surfaces of the flap flange are installed with an O-type sealing strip, the flap flange I and the flap flange II are connected and fixed by a flap surface bolt assembly, and a bolt O-ring is installed on the outer ring of each flap surface bolt assembly, and the bolt O-ring serves to prevent slurry from penetrating into the thread mating surface of the flap surface bolt assembly. The present invention has reliable and stable sealing, strong pressure bearing capacity, low safety risk and a wide range of applications.

Description

Technical Field

[0001] The invention relates to a molding device, in particular to a combined pressure-bearing device with reliable sealing. Background Art

[0002] There are a lot of slurries with poor fluidity in the production and manufacturing processes of industries such as rubber, adhesives, and cosmetics. The slurry is in a fluid state during pouring, and its viscosity increases or solidifies after treatment. In order to increase the density of the slurry after molding, increase the flowability of the slurry, and increase the filling rate of the slurry, it is necessary to inflate and pressurize the slurry after the slurry is poured. Inflation and pressurization require the use of a pressure-bearing device, and the pressure-bearing device is generally filled with slurry. After the slurry is solidified and formed, the pressure-bearing device is removed from the molded slurry. In theory, the pressure-bearing device should be designed as a conical structure with a small top and a large bottom, and a certain draft angle to facilitate demolding; however, due to the influence of process requirements, structural layout, material properties, etc., the pressure-bearing device is designed as a structure with a large top and a small bottom, which makes it impossible for the pressure-bearing device to be removed from the molded slurry. In order to solve this type of problem, the pressure-bearing device needs to be designed as a combined structure, and a petal assembly is added to the pressure-bearing device. However, the petal assembly itself is sealed, and it is difficult to reliably seal with the upper and lower connecting structures, and the stability is poor. Especially when the pressure is greater than 0.25MPa,

[0003] For the reliable sealing problem of this type of combined structure, there are three existing technical solutions:

[0004] (1) For working conditions where the pressure is less than 0.2 MPa and the pressure is stable, the sealing surfaces of the petal assembly are processed to a surface finish of less than or equal to Ra3.2, and the sealing surfaces are pre-tightened with bolts and nuts to ensure reliable sealing during use;

[0005] (2) For working conditions where the pressure is less than 0.4 MPa and the pressure fluctuation is not more than 50 KPa, the sealing surfaces of the petal assembly shall be processed to a surface finish less than or equal to Ra3.2, the sealing surfaces shall be evenly coated with sealant, and the sealing surfaces shall be pre-tightened with bolts and nuts to ensure reliable sealing during use;

[0006] (3) For working conditions with a pressure greater than 0.4 MPa, the pressure-bearing device usually does not adopt a petal combination structure, the overall structure and sealing form vary greatly, and the design scheme is more diverse depending on the specific working conditions.

[0007] The existing technical solutions mainly solve the problem of reliable sealing of combined pressure-bearing devices from multiple aspects such as processing, auxiliary sealants, and structural optimization. The sealing can ensure reliable sealing of the structure under low-pressure working conditions with stable pressure. However, there are disadvantages such as poor pressure bearing capacity, high processing requirements, difficulty in disassembly after applying sealant, the sealing surface needs to be reprocessed for reuse, and the structure is complex after structural optimization. Summary of the invention

[0008] Technical Problems to be Solved by the Invention

[0009] In view of the above problems, the present invention provides a combined pressure-bearing device with reliable sealing, so as to improve the pressure-bearing capacity of the combined pressure-bearing device under reliable sealing and expand the scope of application.

[0010] Technical solutions adopted to solve technical problems

[0011] A reliably sealed combined pressure-bearing device comprises a cylinder head, a cylinder head O-ring, a cylinder head bolt assembly, a cylinder body, a cylinder body bolt assembly, a split-flap upper O-ring, an O-ring sealing strip, a bolt O-ring, a split-flap surface bolt assembly, a split-flap lower O-ring, a split-flap flange I, a transition cylinder and a split-flap flange II. The cylinder body is installed below the cylinder head, a cylinder head O-ring is placed between the cylinder head and the cylinder body, the cylinder head and the cylinder body are connected and fixed by the cylinder head bolt assembly and a pre-tightening force is applied to the cylinder head O-ring; the cylinder body is fixedly connected with the split-flap flange I and the split-flap flange II by the cylinder body bolt assembly below, forming a complete cylinder with flanges at both ends; the split-flap upper O-ring is installed between the lower end face of the cylinder body and the split-flap flange I and the upper end face of the split-flap flange ‖ The sealing ring, the left and right two flap mating surfaces of the flap flange I and the flap flange ‖ are both installed with O-type sealing strips. The flap flange I and the flap flange ‖ are connected and fixed by the flap surface bolt assembly. The outer ring of each flap surface bolt assembly is installed with a bolt O-type sealing ring. The bolt O-type sealing ring prevents the slurry from penetrating into the threaded mating surface of the flap surface bolt assembly. The flap surface bolt assembly applies pre-tightening force to the O-type sealing strip and each bolt O-type sealing ring. The flap flange I and the flap flange ‖ are fixedly connected with a transition cylinder below through the cylinder bolt assembly. The flap lower O-type sealing ring is installed between the lower end surface of the flap flange I and the flap flange ‖ and the upper end surface of the transition cylinder. The installation index circle diameters of the O-type sealing strip, the flap upper O-type sealing ring, and the flap lower O-type sealing ring are equal. The transition cylinder is connected to the pressure-using equipment or tooling to transfer the pressure to the slurry or other media.

[0012] Furthermore, the cylinder head or cylinder body is also discretely and fixedly connected with a safety valve joint, a lifting lug, a pressure gauge joint, and an inflation nozzle by welding. The safety valve joint is connected to the pressure relief valve to serve as a safe pressure relief, the pressure gauge joint is connected to the pressure detection sensor to serve as a pressure detection sensor to detect the internal pressure of the pressure-bearing device, and the inflation nozzle is connected to the pressure source interface to serve as a pressure charging device.

[0013] Beneficial effects obtained by the present invention

[0014] The invention has reliable and stable sealing, strong pressure bearing capacity, low safety risk and wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 : A front view of a combined pressure-bearing device with reliable sealing;

[0016] Figure 2 : A top view of a combined pressure-bearing device with reliable sealing;

[0017] Figure 3 : A partial enlarged view of the radial fit of the sealing surface of a combined pressure-bearing device with reliable sealing;

[0018] Figure 4 : A partial enlarged view of the axial fit of the sealing surface of a combined pressure-bearing device with reliable sealing;

[0019] Figure 5 : A cross-sectional view of an inflatable nozzle of a combined pressure-bearing device with reliable sealing;

[0020] Figure 6 : A cross-sectional view of a pressure gauge joint of a reliably sealed combined pressure-bearing device;

[0021] Among them: 1. Safety valve connector, 2. Lifting ear, 3. Cylinder head, 4. Cylinder head O-ring, 5. Cylinder head bolt assembly, 6. Cylinder body, 7. Cylinder body bolt assembly, 8. Upper O-ring of the split flap, 9. O-type sealing strip, 10. Bolt O-ring, 11. Split surface bolt assembly, 12. Lower O-ring of the split flap, 13. Split flange I, 14. Transition cylinder, 15. Pressure gauge connector, 16. Inflator nozzle, 17. Split flange II. DETAILED DESCRIPTION

[0022] as follows Figure 1-6 As shown, a reliably sealed combined pressure-bearing device includes a safety valve joint, a lifting lug, a cylinder head, a cylinder head O-ring, a cylinder head bolt assembly, a cylinder body, a cylinder body bolt assembly, a split upper O-ring, an O-seal strip, a bolt O-ring, a split surface bolt assembly, a split lower O-ring, a split flange I, a transition tube, a pressure gauge joint, an air charging nozzle, and a split flange II. The safety valve joint, the lifting lug, the pressure gauge joint, the air charging nozzle and the cylinder head are fixedly connected by welding to form an independent integral structure.

[0023] A safety valve joint, a lifting lug, a pressure gauge joint and an air charging nozzle are connected to the cylinder head through welding. The safety valve joint is connected to the pressure relief valve to relieve pressure safely. The pressure gauge joint is connected to the pressure detection sensor to detect the internal pressure of the pressure-bearing device. The air charging nozzle is connected to the pressure source interface to charge the cylinder. A cylinder body is installed under the cylinder head. A cylinder head O-ring is installed between the cylinder head and the cylinder body. The cylinder head and the cylinder body are connected and fixed by a cylinder head bolt assembly and a pre-tightening force is applied to the cylinder head O-ring.

[0024] The lower part of the cylinder body is fixedly connected with the split flange I and the split flange II by the cylinder body bolt assembly. The split flange I and the split flange ‖ are assembled and installed to form a complete cylinder with flanges at both ends; the split upper O-ring is installed between the lower end face of the cylinder body and the upper end faces of the split flange I and the split flange ‖. The left and right two split mating surfaces of the split flange I and the split flange ‖ are both installed with O-ring sealing strips. The length of the O-ring sealing strip itself is longer than the design value derived from the structure. The process margin left in the length of the O-ring sealing strip makes its two ends fit closely with the split upper O-ring and the split lower O-ring respectively and have a certain amount of compression; the split flange I and the split flange ‖ are connected and fixed by the split surface bolt assembly. Each split surface bolt The outer ring of the assembly is installed with a bolt O-ring, which prevents the slurry from penetrating into the threaded mating surface of the split face bolt assembly, and prevents the slurry with high mechanical sensitivity from penetrating into the threaded mating surface of the split face bolt assembly after the seal of the pressure-bearing device fails, which makes the split face flange I and the split face flange ‖ unable to be disassembled; the split face bolt assembly applies a pre-tightening force to the O-ring seal strip and each bolt O-ring, and the split face flange I and the split face flange ‖ are fixedly connected with a transition cylinder through the cylinder bolt assembly below, and the split face flange I and the split face flange ‖ are installed with a split face lower O-ring between the lower end face and the upper end face of the transition cylinder, and the installation index circle diameters of the O-ring seal strip, the split face upper O-ring, and the split face lower O-ring are equal. The transition cylinder is connected to the pressure-using equipment or tooling to transmit the pressure to the slurry or other media.

[0025] The transition tube is connected to the pressure-using equipment or tooling, and the various components of the pressure-bearing device are installed and connected in turn. Pressurized slurry or materials are charged from the inflation nozzle. When the cylinder body, the assembly of the flap flange I and the flap flange ‖, and the inner cavity of the transition tube are filled with the molded slurry or materials, all fasteners connected to the flap flange I and the flap flange II17 are disassembled, and the flap flange I and the flap flange ‖ are removed from the pressure-bearing device. The molded slurry or materials are exposed, and the molded slurry or materials are cut off, and the cylinder head and the cylinder body can be separated and transferred as a whole. The difficulty of sealing the pressure-bearing device is concentrated at the joints of the axial and radial seals of the flap flange I and the flap flange ‖. The flap flange I and the flap flange ‖ of the device have sealing rings in the radial and axial directions, and the sealing rings on all the mating surfaces of the two are in contact with each other and have a certain amount of compression, so that all the sealing rings installed on their surfaces form a whole, and there is no leakage between each other, thereby ensuring the reliable sealing of the pressure-bearing device. In addition, when the mechanical sensitivity of the slurry or material is high, the friction of removing the bolts may cause the slurry or material to spontaneously combust. In order to prevent the slurry from flowing into the split surface bolt assembly after the seal of the split flange I and split flange ‖ fails, causing the pressure-bearing device to be unable to be disassembled, a bolt O-ring is installed on the outer ring of the split surface bolt assembly.

[0026] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A method for using a reliably sealed combined pressure-bearing device, characterized in that: The pressure bearing device includes a cylinder head, a cylinder head O-ring, a cylinder head bolt assembly, a cylinder body, a cylinder body bolt assembly, a split upper O-ring, an O-seal strip, a bolt O-ring, a split surface bolt assembly, a split lower O-ring, a split flange I, a transition tube and a split flange II. The cylinder body is installed under the cylinder head, a cylinder head O-ring is arranged between the cylinder head and the cylinder body, the cylinder head and the cylinder body are connected and fixed by a cylinder head bolt assembly and a pre-tightening force is applied to the cylinder head O-ring, and a split flange I and a split flange II are fixedly connected under the cylinder body by the cylinder body bolt assembly; An upper O-ring is installed between the lower end face of the cylinder body and the upper end faces of the flap flange I and the flap flange II, O-rings are installed on the left and right flap mating faces of the flap flange I and the flap flange II, the flap flange I and the flap flange II are connected and fixed by a flap surface bolt assembly, and a bolt O-ring is installed on the outer ring of each flap surface bolt assembly, a transition cylinder is fixedly connected below the flap flange I and the flap flange II by a cylinder body bolt assembly, a lower O-ring is installed between the lower end faces of the flap flange I and the flap flange II and the upper end face of the transition cylinder, and the installation index circle diameters of the O-ring, the upper O-ring and the lower O-ring are equal; The cylinder head or cylinder body is also connected to a safety valve joint, a lifting lug, a pressure gauge joint, and an air charging nozzle in a dispersed and fixed manner by welding. The safety valve joint is connected to the pressure relief valve to play a role of safe pressure relief. The pressure gauge joint is connected to the pressure detection sensor to play a role of detecting the internal pressure of the pressure-bearing device. The air charging nozzle is connected to the pressure source interface to play a role of pressurization. The method of using the above-mentioned pressure-bearing device is as follows: connect the transition tube to the pressure-using equipment or tooling, and install and connect the various components of the pressure-bearing device in turn; charge the pressurized slurry or material from the inflation nozzle, and when the cylinder body, the assembly of the flap flange I and the flap flange II, and the inner cavity of the transition tube are filled with the formed slurry or material, remove all fasteners connected to the flap flange I and the flap flange II, remove the flap flange I and the flap flange II from the pressure-bearing device, cut off the formed slurry or material, and separate and transfer the cylinder head and the cylinder body as a whole.

Images