An anti-extrusion sealing ring for static pressure shaft seal of nuclear power plant main pump and its preparation process

Abstract

The present invention discloses an anti-extrusion seal ring for static pressure shaft seal of nuclear power station main pump and a preparation process, belonging to the field of polymer compound composition, wherein the device for making the seal ring mainly includes a mixing device, a film forming device and a vulcanizing device; the mixing device is used to mix raw materials and additives to form a rubber material; the compression molding device is used to compression mold the rubber material; and the vulcanizing device is used to vulcanize the formed seal ring body to enhance the mechanical strength, heat resistance and elasticity of the seal ring body; wherein the mixing device includes a frame, a driving component, a heating roller group and an adjusting component, the driving component is installed on the frame, and the heating roller group is rotatably installed on the frame. The purpose of the present invention is to solve the problem that the mixer in the prior art needs to use a scraper to adjust the moving track of the rubber on the roller manually and continuously during rubber mixing, which generates labor costs, and the manual adjustment of the rubber on the roller has a poor effect.

Description

Technical Field

[0001] The invention relates to the technical field of sealing ring preparation, and in particular to an anti-extrusion sealing ring for a static pressure shaft seal of a main pump of a nuclear power plant and a preparation process thereof. Background Art

[0002] The anti-extrusion seal ring for the static pressure shaft seal of the main pump of a nuclear power plant is a key sealing component, which is designed to ensure the safe operation of the main pump of a nuclear power plant under high temperature and high pressure environment, prevent fluid leakage and improve the reliability of the equipment. This seal ring has excellent temperature resistance, pressure resistance and corrosion resistance. With the development of nuclear power technology, higher standards have been put forward for the performance of sealing materials. Therefore, an anti-extrusion seal ring with superior physical and chemical properties has been developed to meet the operating requirements of nuclear power plants under extreme working conditions, thereby ensuring nuclear power safety and environmental protection.

[0003] The invention patent with application number: CN201821160677.1 and publication number: CN208645729U (hereinafter referred to as "prior art 1") discloses an open rubber mixing machine, including a first mounting frame, a second mounting frame, a driving motor, a first movable arm and a transmission gear, the first mounting frame and the second mounting frame are respectively installed on the top of the base, a central axis is installed between the first mounting frame and the second mounting frame, a roller is installed on the outside of the central axis, a mounting casing and a driving motor are installed on the top of the right side base of the second mounting frame in sequence, a rotating shaft is installed at the output end of the driving motor, and a lead screw is installed on the outer wall of the first mounting frame and the second mounting frame.

[0004] The specification of prior art 1 discloses an open rubber mixer. When in use, the spacing of the movable rocker arms can be directly adjusted by a lead screw so that the rubber can contact each other and perform a compression treatment. However, in actual applications, when the mixer mixes the rubber, the rubber on the roller of the rubber mixer will move in a spiral motion on the roller due to the continuous rotation of the roller. It is necessary to manually use a scraper to continuously adjust the moving trajectory of the rubber on the roller, which generates labor costs, and the effect of manually scraping the rubber on the roller is poor. Summary of the invention

[0005] The invention provides an anti-extrusion sealing ring for a static pressure shaft seal of a main pump of a nuclear power plant and a preparation process thereof, aiming to solve the problem that in the prior art, a mixer needs to use a scraper to adjust the movement track of the rubber on a roller continuously by manual labor during rubber mixing, which generates labor costs and has a poor effect in manually scraping the rubber on the roller.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] An anti-extrusion seal ring for a static pressure shaft seal of a main pump of a nuclear power station, wherein the seal ring body is prepared by a preparation device, wherein the preparation device comprises a mixing device, a die-casting device and a vulcanizing device; the mixing device is used to mix raw materials and additives to form a rubber material; the die-casting device is used to die-cast the rubber material; and the vulcanizing device is used to vulcanize the formed seal ring body to enhance the mechanical strength, heat resistance and elasticity of the seal ring body;

[0008] Among them, the mixing device includes a frame, a driving component, a heating roller group and an adjusting component. The driving component is installed on the frame, and the heating roller group is rotatably installed on the frame. The driving component is used to drive the heating roller group to rotate. The adjusting component includes an upper adjusting plate and a lower adjusting plate. The upper adjusting plate is located directly above the heating roller group. The heating roller group and the upper adjusting plate are slidably matched. The upper adjusting plate is used to adjust the width of the raw materials to be mixed. The lower adjusting plate is rotatably installed below the heating roller group through a telescopic component. The telescopic component is hinged on the frame. The lower adjusting plate is used to adjust the thickness of the raw materials to be mixed.

[0009] Furthermore, the heating roller group includes a first heating roller and a second heating roller, both of which are rotatably mounted on the frame, and the bottom edge of the upper adjustment plate is used to contact the first heating roller and the second heating roller, and the lower adjustment plate is used to contact the rubber material on the first heating roller and the second heating roller.

[0010] Furthermore, two support rods and two hinged parts are provided on the frame, the support rods are rotatably connected to the frame, a connecting strip is fixedly installed on the support rods, one end of the telescopic assembly is hinged to the connecting strip and the other end is hinged to the hinged part, and a lower adjustment plate is fixedly installed on each support rod.

[0011] Furthermore, the driving assembly includes a motor and a transmission mechanism. The motor is mounted on the frame. The motor drives the first heating roller and the second heating roller to rotate on the frame through the transmission mechanism.

[0012] Furthermore, the die-casting molding device includes a machine, a turntable, a lifting component and an injection molding component. The machine is used to be placed on a plane. The turntable is rotatably installed on the machine by a toggle component. A plurality of clearance holes are provided on the turntable. The inside of the clearance holes is used to install the injection mold. The lifting component and the injection molding component are both installed on the machine. The lifting component is used to lift the injection mold after passing through the clearance holes and then close to the injection molding component. The injection molding component is used to reheat the rubber material again, mix it to form a fluid and inject the heated fluid rubber material into the injection mold. The injection molding component is used to form the sealing ring body after cooling.

[0013] Furthermore, the toggle assembly includes a rotating cylinder, a toggle disk and a positioning bolt. The rotating cylinder is installed on the machine platform, the toggle disk is fixedly installed on the movable end of the rotating cylinder, a toggle groove is provided on the toggle disk, the positioning bolt is installed at the bottom of the turntable, and the positioning bolt is used to be placed in the toggle groove.

[0014] Furthermore, a support base is arranged on the machine platform, and a roller is rotatably arranged on the support base, and the roller is used to contact the bottom of the turntable.

[0015] Furthermore, the vulcanization device includes a vulcanization furnace, and the vulcanization furnace is used to vulcanize the formed sealing ring body.

[0016] A preparation process for an anti-extrusion seal ring for a static pressure shaft seal of a nuclear power plant main pump, wherein the preparation process for the seal ring body is as follows:

[0017] Step 1: First, put the raw materials for making the sealing ring body into a container;

[0018] Step 2: Install the upper adjustment plate. The upper adjustment plates on both sides are installed just above the hot roller group;

[0019] Step 3: Adjust the position of the lower adjustment plate through the telescopic assembly so that there is a gap between the lower adjustment plate and the hot roller group;

[0020] Step 4: Pour the raw materials of the sealing ring body in the container directly above the heating roller group;

[0021] Step 5: Start the driving assembly, which controls the hot roller group to rotate in opposite directions, thereby refining the raw materials for making the sealing ring body into mixed rubber;

[0022] Step 6: Put the trained rubber into a compression molding device for molding;

[0023] Step 7: Place the formed sealing ring body into a vulcanizing device for vulcanization.

[0024] Furthermore, the raw materials of the sealing ring body include fluororubber (FKM), hydrogenated nitrile rubber (HNBR), additives and rubber base material, wherein the ratio of fluororubber (FKM), hydrogenated nitrile rubber (HNBR), additives and rubber base material is: fluororubber (FKM): hydrogenated nitrile rubber (HNBR): additives: rubber base material = 5:3:1:1.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention mainly comprises a mixing device, a film pressing device and a vulcanizing device; in actual use, the staff first puts the raw materials for making the sealing ring body into the container, then slides the position of the upper adjusting plate above the hot roller group so that a certain width is formed between the two upper adjusting plates, then controls the extension of the telescopic component, and controls the rotation of the lower adjusting plate after the extension of the telescopic component, thereby making a gap between the lower adjusting plate and the hot roller group; then pours the raw materials for the sealing ring body in the container just above the heated roller group, then starts the driving component, and the driving component controls the hot roller group to rotate in opposite directions, thereby repeatedly rolling the raw materials for making the sealing ring body, when the raw materials for making the sealing ring body are squeezed and mixed by the hot roller group, they stick to the hot roller group and rotate with the hot roller group, at this time, the glue sticking to the hot roller group is first adjusted by the lower adjusting plate to form a certain thickness, which is slightly smaller than the gap between the lower adjusting plate and the hot roller group, and the glue is rolled from the hot roller When the bottom of the roller group turns to the top of the hot roller group, the position of the rubber stuck on the hot roller group is restricted by the upper adjusting plate. At this time, the rubber stuck on the hot roller group moves between the two upper adjusting plates. The two upper adjusting plates gather the rubber stuck on the hot roller group, and then repeatedly refine the rubber stuck on the hot roller group to form a mixed rubber material. The refined rubber is then placed in a compression molding device for molding to form a sealing ring body. Finally, the molded sealing ring body is placed in a vulcanizing device for vulcanization, so that the mechanical strength, heat resistance and elasticity of the sealing ring body are better. The advantage of this arrangement is that the position of the rubber stuck on the hot roller group is adjusted by the upper adjusting plate and the lower adjusting plate, and there is no need to manually adjust the position of the rubber stuck on the hot roller group, which can save labor costs. In addition, through the setting of the upper adjusting plate and the lower adjusting plate, the rubber stuck on the hot roller group can also be better gathered, thereby achieving a better rubber refining effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a process flow chart for manufacturing the sealing ring body of the present invention.

[0029] Figure 2 It is one of the structural schematic diagrams of the mixing device in the present invention.

[0030] Figure 3 This is the second schematic diagram of the structure of the mixing device in the present invention.

[0031] Figure 4 It is a schematic structural diagram of the film forming device in the present invention.

[0032] Figure 5 It is a cross-sectional view of the film forming device of the present invention.

[0033] Figure 6 For the present invention Figure 5 A partial enlarged view of point A in the middle.

[0034] Figure 7 This is one of the structural schematic diagrams of the cleaning device in the present invention.

[0035] Figure 8 This is the second structural schematic diagram of the cleaning device in the present invention.

[0036] In the figure, 101-frame, 102-upper adjustment plate, 103-lower adjustment plate, 104-telescopic assembly, 105-first heating roller, 106-second heating roller, 107-support rod, 108-hinge portion, 109-connecting strip, 110-motor, 111-machine table, 112-turntable, 113-allowing hole, 114-injection mold, 115-rotating cylinder, 116-sliding plate, 117-positioning bolt, 118-sliding groove, 119-support seat, 120-roller, 121-slide plate, 122-slide Rod, 123-spring, 124-installation groove, 125-slide hole, 126-arc groove, 127-rotating shaft, 128-pulley, 129-liquid storage tank, 130-infusion tube, 131-discharge tube, 132-installation area, 133-sprocket transmission mechanism, 134-gear transmission mechanism, 135-motor, 136-injection screw, 137-injection cylinder, 138-housing, 139-feed port, 140-discharge port, 141-injection nozzle, 142-support ring, 143-positioning hole, 144-positioning rod. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with embodiments, which are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0038] See also Figure 1-Figure 8As shown, this embodiment discloses an anti-extrusion seal ring for a static pressure shaft seal of a main pump of a nuclear power plant, wherein the seal ring body is prepared by a preparation device, wherein the preparation device comprises a mixing device, a die-casting device and a vulcanizing device; the mixing device is used to mix raw materials and additives to form a rubber material; the die-casting device is used to die-cast the rubber material; and the vulcanizing device is used to vulcanize the formed seal ring body to enhance the mechanical strength, heat resistance and elasticity of the seal ring body;

[0039] Among them, the mixing device includes a frame 101, a driving component, a heating roller group and an adjusting component. The driving component is installed on the frame 101, and the heating roller group is rotatably installed on the frame 101. The driving component is used to drive the heating roller group to rotate. The adjusting component includes an upper adjusting plate 102 and a lower adjusting plate 103. The upper adjusting plate 102 is located directly above the heating roller group. The heating roller group and the upper adjusting plate 102 are slidably matched. The upper adjusting plate 102 is used to adjust the width of the raw materials to be mixed. The lower adjusting plate 103 is rotatably installed below the heating roller group through a telescopic component 104. The telescopic component 104 is hinged on the frame 101. The lower adjusting plate 103 is used to adjust the thickness of the raw materials to be mixed.

[0040] The present invention mainly comprises a mixing device, a film forming device and a vulcanizing device; in actual use, the staff first puts the raw materials for making the sealing ring body into a container, then slides the position of the upper adjusting plate 102 above the hot roller group to form a certain width between the two upper adjusting plates 102, then controls the telescopic component 104 to extend, and after the telescopic component 104 extends, controls the lower adjusting plate 103 to rotate, thereby making a gap between the lower adjusting plate 103 and the hot roller group; then pours the raw materials for the sealing ring body in the container just above the heated roller group, then starts the driving component, and the driving component controls the hot roller group to rotate in opposite directions, thereby repeatedly rolling the raw materials for making the sealing ring body, when the raw materials for making the sealing ring body are squeezed and mixed by the hot roller group, they stick to the hot roller group and rotate with the hot roller group, at this time, the glue sticking to the hot roller group is first adjusted by the lower adjusting plate 103 to form a certain thickness, which is slightly smaller than the gap between the lower adjusting plate 103 and the hot roller group, and the glue is rolled from When the lower part of the hot roller group turns to the upper part of the hot roller group, the position of the rubber stuck on the hot roller group is restricted by the upper adjustment plate 102. At this time, the rubber stuck on the hot roller group moves between the two upper adjustment plates 102. The two upper adjustment plates 102 gather the rubber stuck on the hot roller group, and then repeatedly refine the rubber stuck on the hot roller group to form a mixed rubber material. The refined rubber is then placed in a compression molding device for molding to form a sealing ring body. Finally, the molded sealing ring body is placed in a vulcanization device for vulcanization, so that the mechanical strength, heat resistance and elasticity of the sealing ring body are better. The advantage of this arrangement is that the position of the rubber stuck on the hot roller group is adjusted by the upper adjustment plate 102 and the lower adjustment plate 103, and there is no need to manually adjust the position of the rubber stuck on the hot roller group, which can save labor costs. In addition, through the arrangement of the upper adjustment plate 102 and the lower adjustment plate 103, the rubber stuck on the hot roller group can also be better gathered, thereby achieving a better rubber refining effect.

[0041] In some embodiments, the heating roller group includes a first heating roller 105 and a second heating roller 106, and the first heating roller 105 and the second heating roller 106 are both rotatably mounted on the frame 101, and the bottom edge of the upper adjustment plate 102 is used to contact the first heating roller 105 and the second heating roller 106, and the lower adjustment plate 103 is used to contact the rubber material on the first heating roller 105 and the second heating roller 106.

[0042] In actual use, the staff pours the raw material for making the sealing ring body on top of the first heating roller 105 and the second heating roller 106. The first heating roller 105 and the second heating roller 106 rotate in opposite directions to crush the raw material for making the sealing ring body, so that the raw material for making the sealing ring body sticks to the first heating roller 105 and the second heating roller 106. Through the continuous rotation of the first heating roller 105 and the second heating roller 106, the glue on the second heating roller 106 adheres to the first heating roller 105, finally forming a rubber material.

[0043] In some embodiments, two support rods 107 and two hinged parts 108 are provided on the frame 101. The support rods 107 are rotatably connected to the frame 101. A connecting strip 109 is fixedly installed on the support rods 107. One end of the telescopic assembly 104 is hinged to the connecting strip 109 and the other end is hinged to the hinged part 108. Each support rod 107 is fixedly installed with a lower adjustment plate 103.

[0044] In actual use, there are two telescopic assemblies 104, which are respectively hinged on the frame 101 and located at the bottom of the first heating roller 105 and the second heating roller 106;

[0045] As an optional implementation, in this embodiment, the telescopic component 104 is specifically a cylinder. When in use, when the cylinder is extended, the movable end of the cylinder pushes the connecting bar 109, and the connecting bar 109 pulls the support rod 107 to make the support rod 107 rotate around the frame 101. Since the support rod 107 is fixedly connected to the lower adjustment plate 103, the support rod 107 rotates and then causes the lower adjustment plate 103 to rotate in the direction close to the hot roller group, thereby achieving the adjustment of the angle of the lower adjustment plate 103.

[0046] In other embodiments, the staff found that after the upper adjustment plate 102 is installed, the first heating roller 105 and the second heating roller 106 will generate friction with the arc-shaped lower end surface of the upper adjustment plate 102 after rotation. In order to reduce the friction and extend the service life of the upper adjustment plate 102, the first heating roller 105 and the second heating roller 106, a friction reducing device is provided;

[0047] Among them, the friction reducing device includes a slide plate 121, a slide rod 122 and a spring 123. The upper adjustment plate 102 is provided with a mounting groove 124. The slide plate 121 is slidably arranged inside the mounting groove 124. A sliding hole 125 is arranged on the bottom surface of the mounting groove 124. One end of the spring 123 is connected to the end surface of the sliding hole 125, and the other end is connected to the slide rod 122. One end of the slide rod 122 is connected to the spring 123, and the other end is fixedly connected to the horizontal end surface of the slide plate 121. The slide rod 122 is used to slide inside the sliding hole 125. An arc groove 126 is arranged on the slide plate 121. A plurality of rotating shafts 127 are rotatably installed inside the arc groove 126. A pulley 128 is fixedly installed on the rotating shaft 127. The pulley 128 is used to be slidably connected with the first heating roller 105 and the second heating roller 106.

[0048] In actual use, the elastic force of the spring 123 pushes the sliding rod 122 to slide inside the sliding hole 125. Since the sliding rod 122 is fixedly connected to the slide plate 121, the spring 123 pushes the sliding rod 122 and the slide plate 121 as a whole to slide inside the mounting groove 124, so that the pulley 128 is close to the first heating roller 105 and the second heating roller 106. When the first heating roller 105 and the second heating roller 106 rotate, rotational friction occurs between them and the pulley 128, so that the sliding friction originally occurring between the first heating roller 105 and the second heating roller 106 and the arc-shaped end surface of the upper adjustment plate 102 is converted into rotational friction between the first heating roller 105 and the second heating roller 106 and the pulley 128, thereby greatly reducing the friction between the first heating roller 105 and the second heating roller 106 and the arc-shaped end surface of the upper adjustment plate 102, and effectively improving the service life of the upper adjustment plate 102, the first heating roller 105 and the second heating roller 106.

[0049] In other embodiments, the staff found that after the rubber material is made, a lot of rubber residues will remain on the first heating roller 105 and the second heating roller 106. In order to ensure that the next rubber material of other materials will not be mixed with the residues left over from the previous rubber material making, the first heating roller 105 and the second heating roller 106 need to be cleaned. During the cleaning, the staff found a defect, that is, the temperature of the first heating roller 105 and the second heating roller 106 is very high after the work is completed. It is necessary to stop the heating of the first heating roller 105 and the second heating roller 106 and wait for a long time for the first heating roller 105 and the second heating roller 106 to cool down before cleaning the first heating roller 105 and the second heating roller 106. Therefore, the staff designed a cleaning device that does not require manual cleaning to clean the residues on the first heating roller 105 and the second heating roller 106, and it is also unnecessary to wait for the first heating roller 105 and the second heating roller 106 to cool down.

[0050] Among them, the cleaning device includes a liquid storage tank 129, an infusion tube 130 and a drainage tube 131. An installation area 132 is provided inside the skateboard 121. The liquid storage tank 129 is arranged in the installation area 132. One end of the infusion tube 130 is inserted into the liquid storage tank 129, and the other end is connected to the outside after passing through the skateboard 121. The end of the infusion tube 130 exposed to the outside is provided with a one-way valve, and the staff is used to input the rubber remover into the infusion tube 130 through the one-way valve. There are a plurality of drainage tubes 131, and the plurality of drainage tubes 131 are arranged on both sides of the liquid storage tank 129. The rotating shaft 127 is a hollow structure, and the two ends of the rotating shaft 127 are respectively connected to the end of the drainage tube 131 through a rotating bearing. The pulley 128 is a hollow structure, and the outer wall of the pulley 128 is provided with a drainage hole that communicates with the inside and the outside.

[0051] In actual use, when it is necessary to clean the rubber residue on the first heating roller 105 and the second heating roller 106, the staff will pass the rubber remover into the liquid storage tank 129 through the liquid infusion tube 130. At this time, the rubber remover in the liquid storage tank 129 is passed into each pulley 128 through the liquid discharge tube 131. Since the pulley 128 has a liquid discharge hole, the rubber remover will flow to the first heating roller 105 and the second heating roller 106 through the liquid discharge hole, and then slide the two upper adjustment plates 102 so that the two upper adjustment plates 102 are 02 Move repeatedly on the first heating roller 105 and the second heating roller 106, and the rubber remover at room temperature quickly cools down the first heating roller 105 and the second heating roller 106. At the same time, the rubber remover acts on the rubber residue. The staff can wipe the cooled first heating roller 105 and the second heating roller 106, so that the first heating roller 105 and the second heating roller 106 can be quickly cleaned, which effectively reduces the time interval between the two operations and improves the efficiency of the staff in making rubber materials next time.

[0052] In some embodiments, the driving assembly includes a motor 110 and a transmission mechanism. The motor 110 is mounted on the frame 101 . The motor 110 drives the first heating roller 105 and the second heating roller 106 to rotate on the frame 101 through the transmission mechanism.

[0053] In actual use, the transmission mechanism mainly includes a sprocket transmission mechanism 133 and a gear transmission mechanism 134, wherein the motor 110 drives the first heating roller 105 to rotate through the sprocket rotation mechanism, and drives the second heating roller 106 to rotate through the gear transmission mechanism 134;

[0054] As an optional implementation, in this embodiment, the sprocket transmission mechanism 133 includes a driving sprocket, a driven sprocket and a chain, and the gear transmission mechanism 134 includes a driving gear and a driven gear, wherein the driving sprocket is fixedly mounted on the output shaft of the motor 110, the driven sprocket is fixedly mounted on the end of the first heating roller 105, the driving gear is fixedly mounted on the end of the first heating roller 105 away from the driven sprocket, and the driven gear is fixedly mounted on the end of the second heating roller 106 close to the driving gear, the driving gear and the driven gear are meshed with each other, and the chain is sleeved on the driving sprocket and the driven sprocket.

[0055] When in use, the motor 110 drives the driving sprocket to rotate, and after the driving sprocket rotates, it drives the driven sprocket to rotate under the action of the chain, and after the driven sprocket rotates, the first heating roller 105 rotates, and after the first heating roller 105 rotates, under the action of the mutual meshing of the driving gear and the driven gear, the second heating roller 106 rotates along with the first heating roller 105. Since the driving gear and the driven gear form an external meshing, the rotation directions of the first heating roller 105 and the second heating roller 106 are opposite, and the first heating roller 105 and the second heating roller 106 rotate in opposite directions to each other.

[0056] In some embodiments, the compression molding device includes a machine 111, a turntable 112, a lifting assembly and an injection molding assembly. The machine 111 is used to be placed on a plane. The turntable 112 is rotatably installed on the machine 111 by a toggle assembly. A plurality of clearance holes 113 are provided on the turntable 112. The inside of the clearance holes 113 is used to install an injection mold 114. The lifting assembly and the injection molding assembly are both installed on the machine 111. The lifting assembly is used to lift the injection mold 114 after passing through the clearance holes 113 and then put it close to the injection molding assembly. The injection molding assembly is used to reheat the rubber material again, mix it to form a fluid, and inject the heated fluid rubber material into the injection mold 114. The injection molding assembly is used to form the sealing ring body after cooling.

[0057] As an optional implementation, in this embodiment, the lifting component is specifically a hydraulic cylinder, and the injection molding component includes a motor 135, an injection molding screw 136, an injection molding barrel 137 and a shell 138. The shell 138 is arranged on the machine 111, and the fixed end of the motor 135 is installed on the shell 138, and the movable end is used to drive the injection molding screw 136 to rotate. The injection molding barrel 137 is connected to the shell 138 and communicated with the shell 138. The injection molding screw 136 is used to rotate inside the injection molding barrel 137. The injection molding barrel 137 is provided with a feed port 139 and a discharge port 140. The feed port 139 is used to feed the rubber material formed in the mixing device, and the end of the discharge port 140 is provided with an injection nozzle 141, and the injection nozzle 141 is provided with a valve.

[0058] In actual use, when the staff needs to mold the sealing ring body, they first feed the rubber material formed in the mixing device into the feed port 139, and then start the motor 135. After the motor 135 rotates, it drives the injection screw 136 to rotate. The injection screw 136 stirs the rubber material. A graphene heating interlayer is provided inside the injection cylinder 137. The graphene heating interlayer melts the rubber material in the injection cylinder 137 and performs secondary mixing on the fluid rubber material through the injection screw 136. At the same time, the staff drives the hydraulic cylinder to extend. When the hydraulic cylinder extends, it pushes the injection molding in the yield hole 113 on the turntable 112. The mold 114 rises, and when the pouring port on the injection mold 114 is aligned with the injection nozzle 141 at the discharge port 140, the valve is opened, and the fluid rubber material is introduced into the injection mold 114. After a certain amount of fluid rubber material is injected, the valve is closed, and the hydraulic cylinder descends until the injection mold 114 completely falls into the clearance hole 113. The toggle assembly toggles the turntable 112 to rotate so that the axis of the next clearance hole 113 is in line with the axis of the movable end of the hydraulic cylinder. Repeat the above operation to perform injection molding. When the rubber material in the injection mold 114 is cooled, the injection mold 114 is opened, and the sealing ring body can be taken out after the mold is opened.

[0059] In some embodiments, the toggle assembly includes a rotating cylinder 115, a toggle disk 116 and a positioning bolt 117. The rotating cylinder 115 is installed on the machine platform 111. The toggle disk 116 is fixedly installed on the movable end of the rotating cylinder 115. A toggle groove 118 is provided on the toggle disk 116. The positioning bolt 117 is installed at the bottom of the turntable 112, and the positioning bolt 117 is used to be placed in the toggle groove 118.

[0060] In actual use, when the turntable 112 is rotated, the staff drives the rotating cylinder 115 to rotate. After the rotating cylinder 115 rotates, it drives the toggle plate 116 to rotate and then drives the toggle slot 118 to rotate. After the toggle slot 118 rotates, it drives the positioning bolt 117 to rotate, thereby driving the turntable 112 to rotate.

[0061] In some embodiments, a support base 119 is disposed on the machine platform 111 , and a roller 120 is rotatably disposed on the support base 119 , and the roller 120 is used to contact the bottom of the turntable 112 .

[0062] In actual use, the purpose of providing the support seat 119 is to install the roller 120 , and the purpose of providing the roller 120 is to facilitate supporting the turntable 112 while reducing the friction of the turntable 112 .

[0063] In some embodiments, a support ring 142 is disposed inside the clearance hole 113 , and the injection mold 114 is used to be placed on the support ring 142 .

[0064] In some embodiments, a positioning hole 143 is disposed at the telescopic end of the hydraulic cylinder, and a positioning rod 144 is disposed at the bottom of the injection mold 114 . The positioning rod 144 is used to be inserted into the positioning hole 143 .

[0065] In some embodiments, the vulcanization device includes a vulcanization furnace, and the vulcanization furnace is used to vulcanize the molded sealing ring body.

[0066] During actual use, the staff puts the formed sealing ring body into a vulcanization furnace for vulcanization, thereby improving the mechanical strength, heat resistance and elasticity of the sealing ring body.

[0067] In other embodiments, the present invention further discloses a process for preparing an anti-extrusion seal ring for a static pressure shaft seal of a main pump of a nuclear power plant, and the process for preparing the seal ring body is as follows:

[0068] Step 1: First, put the raw materials for making the sealing ring body into a container;

[0069] Step 2: Install the upper adjustment plate 102, and install the upper adjustment plates 102 on both sides directly above the hot roller group;

[0070] Step 3: Adjust the position of the lower adjustment plate 103 by the telescopic assembly 104 so that there is a gap between the lower adjustment plate 103 and the hot roller assembly;

[0071] Step 4: Pour the raw materials of the sealing ring body in the container directly above the heating roller group;

[0072] Step 5: Start the driving assembly, which controls the hot roller group to rotate in opposite directions, thereby refining the raw materials for making the sealing ring body into mixed rubber;

[0073] Step 6: Put the trained rubber into a compression molding device for molding;

[0074] Step 7: Place the formed sealing ring body into a vulcanizing device for vulcanization.

[0075] In some embodiments, the raw materials of the sealing ring body include fluororubber (FKM), hydrogenated nitrile rubber (HNBR), additives and rubber base material, wherein the ratio of fluororubber (FKM), hydrogenated nitrile rubber (HNBR), additives and rubber base material is: fluororubber (FKM): hydrogenated nitrile rubber (HNBR): additives: rubber base material = 5:3:1:1.

[0076] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0077] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0078] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0079] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-extrusion seal ring for static pressure shaft seal of main pump of nuclear power plant, characterized in that: The sealing ring body is prepared by a preparation device, wherein the preparation device comprises: A mixing device, wherein the mixing device is used to mix raw materials and additives to form a rubber material; A compression molding device, the compression molding device is used to compression mold the rubber material; and A vulcanizing device, which is used to vulcanize the formed sealing ring body to enhance the mechanical strength, heat resistance and elasticity of the sealing ring body; The mixing device comprises a frame (101), a driving component, a heating roller group and an adjusting component. The driving component is mounted on the frame (101). The heating roller group is rotatably mounted on the frame (101). The driving component is used to drive the heating roller group to rotate. The adjusting component comprises an upper adjusting plate (102) and a lower adjusting plate (103). The upper adjusting plate (102) is located directly above the heating roller group. The heating roller group and the upper adjusting plate (102) are slidably matched. The upper adjusting plate (102) is used to adjust the width of the raw materials to be mixed. The lower adjusting plate (103) is rotatably mounted below the heating roller group through a telescopic component (104). The telescopic component (104) is hinged on the frame (101). The lower adjusting plate (103) is used to adjust the thickness of the raw materials to be mixed.

2. According to claim 1, an anti-extrusion seal ring for static pressure shaft seal of a nuclear power plant main pump and a preparation process thereof are characterized in that: The heating roller group comprises a first heating roller (105) and a second heating roller (106), the first heating roller (105) and the second heating roller (106) are both rotatably mounted on a frame (101), the bottom edge of the upper adjustment plate (102) is used to contact the first heating roller (105) and the second heating roller (106), and the lower adjustment plate (103) is used to contact the rubber material on the first heating roller (105) and the second heating roller (106).

3. The anti-extrusion seal ring for static pressure shaft seal of a nuclear power plant main pump according to claim 2, characterized in that: Two support rods (107) and two hinged parts (108) are arranged on the frame (101); the support rods (107) are rotatably connected to the frame (101); a connecting strip (109) is fixedly mounted on the support rods (107); one end of the telescopic assembly (104) is hinged to the connecting strip (109) and the other end is hinged to the hinged part (108); and one of the lower adjustment plates (103) is fixedly mounted on each support rod (107).

4. The anti-extrusion seal ring for static pressure shaft seal of a nuclear power plant main pump according to claim 2, characterized in that: The driving assembly comprises a motor (110) and a transmission mechanism. The motor (110) is mounted on the frame (101). The motor (110) drives the first heating roller (105) and the second heating roller (106) to rotate on the frame (101) through the transmission mechanism.

5. The anti-extrusion seal ring for static pressure shaft seal of a nuclear power plant main pump according to claim 1, characterized in that: The film forming device comprises a machine (111), a turntable (112), a lifting component and an injection molding component. The machine (111) is used to be placed on a plane. The turntable (112) is rotatably mounted on the machine (111) by means of a toggle component. A plurality of clearance holes (113) are provided on the turntable (112). The inside of the clearance holes (113) is used to mount an injection mold (114). The lifting component and the injection molding component are both mounted on the machine (111). The lifting component is used to lift the injection mold (114) after passing through the clearance holes (113) and then move close to the injection molding component. The injection molding component is used to reheat the rubber material again, mix it to form a fluid, and inject the heated fluid rubber material into the injection mold (114). The injection molding component is used to form the sealing ring body after cooling.

6. The anti-extrusion seal ring for static pressure shaft seal of a nuclear power plant main pump and the preparation process according to claim 5, characterized in that: The toggle assembly comprises a rotating cylinder (115), a toggle plate (116) and a positioning bolt (117); the rotating cylinder (115) is mounted on a machine platform (111); the toggle plate (116) is fixedly mounted on a movable end of the rotating cylinder (115); a toggle groove (118) is arranged on the toggle plate (116); the positioning bolt (117) is mounted on the bottom of a rotating disk (112); and the positioning bolt (117) is used to be placed in the toggle groove (118).

7. The anti-extrusion seal ring for static pressure shaft seal of a nuclear power plant main pump and the preparation process according to claim 5, characterized in that: A support seat (119) is arranged on the machine platform (111), and a roller (120) is rotatably arranged on the support seat (119), and the roller (120) is used to contact the bottom of the turntable (112).

8. The anti-extrusion seal ring for static pressure shaft seal of a nuclear power plant main pump and its preparation process according to claim 1, characterized in that: The vulcanizing device comprises a vulcanizing furnace, and the vulcanizing furnace is used to vulcanize the formed sealing ring body.

9. A process for preparing an anti-extrusion seal ring for a static pressure shaft seal of a nuclear power plant main pump, characterized in that: The sealing ring body is an anti-extrusion sealing ring for static pressure shaft seal of a nuclear power plant main pump as described in any one of claims 1 to 8; The preparation process of the sealing ring body is as follows: Step 1: First, put the raw materials for making the sealing ring body into a container; Step 2: Install the upper adjustment plate (102), and the upper adjustment plates (102) on both sides are installed just above the hot roller group; Step 3: adjusting the position of the lower adjustment plate (103) by means of the telescopic assembly (104) so ​​that there is a gap between the lower adjustment plate (103) and the hot roller assembly; Step 4: Pour the raw materials of the sealing ring body in the container directly above the heating roller group; Step 5: Start the driving assembly, which controls the hot roller group to rotate in opposite directions, thereby refining fluororubber (FKM), hydrogenated nitrile rubber (HNBR), additives and rubber base materials into mixed rubber; Step 6: Put the trained rubber into a compression molding device for molding; Step 7: Place the formed sealing ring body into a vulcanizing device for vulcanization.

10. The anti-extrusion seal ring for static pressure shaft seal of a nuclear power plant main pump and its preparation process according to claim 1, characterized in that: The raw materials of the sealing ring body include fluororubber (FKM), hydrogenated nitrile rubber (HNBR), additives and rubber base material, wherein the proportion of fluororubber (FKM), hydrogenated nitrile rubber (HNBR), additives and rubber base material is: fluororubber (FKM): hydrogenated nitrile rubber (HNBR): additives: rubber base material = 5:3:1:1.

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