Protection device suitable for flange sealing surface of pressure vessel

Abstract

The utility model discloses a protection device suitable for pressure vessel flange sealing surfaces, which comprises a plurality of protection plate units which are sequentially connected end to end, all the protection plate units are spliced into an annular protection plate, a plurality of avoiding grooves are arranged on the lower surface of the protection plate, the avoiding grooves correspond to the sealing surfaces one by one, the avoiding grooves are uniformly distributed on the protection plate units, and the protection plate units are arranged on the protection plate units. Inner protruding blocks are fixedly connected to the inner sides of the upper surfaces of the protection plate units, mounting grooves are formed in the outer sides of the inner protruding blocks, the connecting positions of the mounting grooves in all the protection plate units are annular grooves, and elastic connecting rings are arranged in the annular grooves. The protection device suitable for the flange sealing surface of the pressure vessel can effectively protect the flange sealing surface of the pressure vessel. The protection device is convenient to assemble and disassemble and has the advantages of being capable of being directly, safely and efficiently installed manually, resistant to mechanical falling impact and high-pressure large-flow water flow disturbance and the like. And safe and reliable protection requirements in the whole process of overhaul of the flange sealing surface can be met.

Description

Technical Field

[0001] The utility model belongs to the technical field of protection devices, and particularly relates to a protection device applicable to the flange sealing surface of a pressure vessel. Background Art

[0002] In the nuclear power field, equipment needs to be regularly repaired and maintained. The pressure vessels in nuclear power plants are large in volume and heavy in weight. During the repair process, the flange sealing surface of the pressure vessel is in an exposed state, and a protection device needs to be installed to prevent damage to the sealing surface. At present, the flange sealing surface protection devices adopted by the M310 nuclear power plant for the reactor pressure vessel are all integral annular metal protection rings. The current flange sealing surface protection process has problems such as complex processes, high hoisting risks, and incomplete protection processes. The flange sealing surface of the pressure vessel is the pressure-bearing boundary of the primary circuit of the reactor, which is related to the sealing performance and operation safety of the reactor. A safe and reliable protection process and protection device are important technical guarantees to ensure the good state of the flange sealing surface. Content of the Utility Model

[0003] To solve the above technical problems, the technical solution adopted by the utility model is: a protection device applicable to the flange sealing surface of a pressure vessel. The pressure vessel includes a vessel body, and the lower end of the vessel body is fixedly connected with a flange. The flange is provided with a plurality of bolt holes arranged in a circumferential and regular array, and a sealing surface is arranged around the bolt holes. The protection device includes a plurality of guard plate units connected end to end in sequence. All the guard plate units are spliced into an annular protection plate. The lower surface of the protection plate is provided with a plurality of avoidance grooves, and the avoidance grooves correspond to the sealing surfaces one by one. The avoidance grooves are evenly distributed on the guard plate units. An inner convex block is fixedly connected to the inner side of the upper surface of the guard plate unit, and an installation groove is arranged outside the inner convex block. The connection parts of the installation grooves on all the guard plate units form an annular groove, and an elastic connection ring is arranged in the annular groove.

[0004] As a preference of the above technical solution, one side of the guard plate unit is provided with a clamping groove, and the other side is provided with a clamping slide bar. The clamping groove and the clamping slide bar are respectively perpendicular to the central axis of the protection plate, and the clamping slide bar of the guard plate unit is inserted into the clamping groove of the adjacent guard plate unit.

[0005] As a preference of the above technical solution, one end of the clamping groove close to the central axis of the protection plate is provided with a hook groove formed by downward depression, and a hook part formed by downward bending is arranged at a position corresponding to the hook groove on the clamping slide bar. The hook part is hooked into the hook groove.

[0006] As a preference of the above technical solution, a fixing block is arranged in the middle of the installation groove, and a through hole for the elastic connection ring to pass through is arranged on the fixing block.

[0007] Preferably, as the above technical solution, the elastic connection ring is formed by connecting the head and tail of an elastic strip. One end of the elastic strip is fixedly connected with a head fixing block, and the head fixing block is located in the installation groove on one of the guard plate units. This guard plate unit is set as the first guard plate unit. The guard plate unit adjacent to one side of the first guard plate unit is set as the tail guard plate unit. A tail fixing block is fixedly connected in the installation groove on the tail guard plate unit. The other end of the elastic strip is fixedly connected with the tail fixing block, and the tail fixing block and the head fixing block are close to each other.

[0008] Preferably, as the above technical solution, the elastic strip is an elastic band or a spring.

[0009] Preferably, as the above technical solution, the guard plate unit, the inner convex block, and the fixing block are integrally formed of plastic. The tail fixing block is connected to the tail guard plate unit by screws, and the head fixing block is connected to the first guard plate unit by screws.

[0010] The beneficial effects of the present utility model are as follows: The protection device of the present utility model applicable to the sealing surface of the pressure vessel flange can effectively protect the sealing surface of the pressure vessel flange. The protection device is convenient to load and unload, and has the advantages of direct manual installation, safety, high efficiency, resistance to mechanical drop impact, and resistance to disturbance of high-pressure large-flow water flow. It can meet the safety and reliable protection requirements during the overhaul of the flange sealing surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a structural schematic diagram of the present utility model;

[0012] Figure 2 is a partial structural schematic diagram of the present utility model;

[0013] Figure 3 is a structural schematic diagram of the protection plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work fall within the scope of protection of the present utility model.

[0015] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "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. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0016] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0017] As Figures 1-3 shown, a protection device applicable to the sealing surface 4 of the pressure vessel flange 2. The pressure vessel includes a container body 1. The lower end of the container body 1 is fixedly connected with a flange 2. The flange 2 is provided with a number of bolt holes 3 arranged in a circumferential and regular array. The periphery of the bolt holes 3 is provided with a sealing surface 4. The protection device includes a number of guard plate units 5 connected end to end in sequence. All the guard plate units 5 are spliced into an annular protection plate. The lower surface of the protection plate is provided with a number of avoidance grooves 6. The avoidance grooves 6 correspond to the sealing surface 4 one by one. The avoidance grooves 6 are evenly distributed on the guard plate units 5. The inner side of the upper surface of the guard plate unit 5 is fixedly connected with an inner convex block 7. An installation groove 8 is arranged on the outer side of the inner convex block 7. The connection parts of the installation grooves 8 on all the guard plate units 5 form an annular groove, and an elastic connection ring is arranged in the annular groove.

[0018] Furthermore, one side of the guard plate unit 5 is provided with a clamping groove 9, and the other side is provided with a clamping slide bar 10. The clamping groove 9 and the clamping slide bar 10 are respectively perpendicular to the central axis of the protection plate. The clamping slide bar 10 of the guard plate unit 5 is inserted into the clamping groove 9 of the adjacent guard plate unit 5.

[0019] Further, at one end of the clamping groove 9 close to the central axis of the protection plate, a hook groove 11 is formed by downward depression. At a position corresponding to the hook groove 11 on the clamping slide bar 10, a hook portion 12 is formed by downward bending, and the hook portion 12 is hooked into the hook groove 11. In the splicing method, the clamping slide bar 10 is inserted into the clamping groove 9 of the adjacent protection plate unit 5. After reaching the position, the protection plate unit 5 is released, so that the hook portion 12 automatically falls into the hook groove 11. In this way, relative displacement between two adjacent protection plate units 5 in the radial direction will not occur, and all the protection plate units 5 can be connected into a whole after installation.

[0020] Further, a fixing block 13 is provided in the middle of the installation groove 8, and a through hole for the elastic connection ring to pass through is provided on the fixing block 13.

[0021] Further, the elastic connection ring is formed by connecting the head and tail of an elastic strip 14. One end of the elastic strip 14 is fixedly connected with a head-end fixing block 15, and the head-end fixing block 15 is located in the installation groove 8 of one of the protection plate units 5. This protection plate unit 5 is designated as the first protection plate unit 16. The protection plate unit 5 adjacent to one side of the first protection plate unit 16 is designated as the tail protection plate unit 17. A tail-end fixing block 18 is fixedly connected in the installation groove 8 of the tail protection plate unit 17. The other end of the elastic strip 14 is fixedly connected with the tail-end fixing block 18, and the tail-end fixing block 18 and the head-end fixing block 15 are close to each other. The elastic strip 14 connects all the protection plate units 5 into a whole, which is convenient for installation and disassembly.

[0022] Further, the elastic strip 14 is an elastic band or a spring. The elastic strip 14 has a certain elasticity and a certain structural strength, and can connect all the protection plate units 5 into one body, which is convenient for installing and disassembling the protection plate.

[0023] Further, the protection plate unit 5, the inner convex block 7, and the fixing block 13 are integrally formed by plastic. The tail-end fixing block 18 is connected to the tail protection plate unit 17 by screws, and the head-end fixing block 15 is connected to the first protection plate unit 16 by screws. The protection plate made of plastic will not scratch the sealing surface 4 of the pressure vessel flange 2, and can form a protective effect on the sealing surface 4. The tail-end fixing block 18 and the head-end fixing block 15 are respectively detachably connected to the corresponding protection plate units 5, so that the elastic strip 14 can be replaced.

[0024] It is worth mentioning that the technical features such as the pressure vessel involved in the patent application of the present utility model should be regarded as the prior art. For the specific structures, working principles, and possible control methods and spatial arrangement methods involved in these technical features, the conventional selections in the art can be adopted, and they should not be regarded as the inventive points of the patent of the present utility model. The patent of the present utility model will not be further specifically elaborated.

[0025] The preferred specific embodiments of the present utility model have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present utility model without creative work. Therefore, all technical solutions that can be obtained by those skilled in the art in this technical field based on the concept of the present utility model through logical analysis, reasoning, or limited experiments on the basis of the prior art shall fall within the protection scope determined by the claims.

Claims

1. A protection device applicable to the sealing surface of a pressure vessel flange. The pressure vessel includes a vessel body, and the lower end of the vessel body is fixedly connected with a flange. The flange is provided with a number of bolt holes arranged in a circumferential array, and a sealing surface is provided around the bolt holes. It is characterized in that, The protection device includes a number of guard plate units connected end to end in sequence. All the guard plate units are spliced into a ring-shaped protection plate. A number of avoidance grooves are provided on the lower surface of the protection plate, and the avoidance grooves correspond to the sealing surfaces one by one. The avoidance grooves are evenly distributed on the guard plate units. An inner convex block is fixedly connected to the inner side of the upper surface of the guard plate unit. An installation groove is provided on the outer side of the inner convex block. The connection parts of the installation grooves on all the guard plate units form an annular groove, and an elastic connection ring is provided in the annular groove.

2. The protection device applicable to the flange sealing surface of a pressure vessel according to claim 1, wherein A clamping groove is provided on one side of the guard plate unit, and a clamping slide bar is provided on the other side. The clamping groove and the clamping slide bar are respectively perpendicular to the central axis of the protection plate. The clamping slide bar of the guard plate unit is inserted into the clamping groove of the adjacent guard plate unit.

3. The protection device applicable to the flange sealing surface of a pressure vessel according to claim 2, characterized in that, A hook groove formed by downward depression is provided at one end of the clamping groove close to the central axis of the protection plate. A hook portion formed by downward bending is provided at the position corresponding to the hook groove on the clamping slide bar, and the hook portion is hooked into the hook groove.

4. The protection device applicable to the flange sealing surface of a pressure vessel according to claim 1, characterized in that, A fixing block is provided in the middle of the installation groove, and a through hole for the elastic connection ring to pass through is provided on the fixing block.

5. The protection device applicable to the flange sealing surface of a pressure vessel as described in claim 4, characterized in that, The elastic connection ring is formed by connecting the head and tail of an elastic strip. One end of the elastic strip is fixedly connected with a head-end fixing block. The head-end fixing block is located in the installation groove of one of the guard plate units, and this guard plate unit is designated as the first guard plate unit. The guard plate unit adjacent to one side of the first guard plate unit is designated as the tail guard plate unit. A tail-end fixing block is fixedly connected in the installation groove of the tail guard plate unit. The other end of the elastic strip is fixedly connected with the tail-end fixing block, and the tail-end fixing block and the head-end fixing block are close to each other.

6. The protection device applicable to the flange sealing surface of a pressure vessel according to claim 5, characterized in that, The elastic strip is an elastic band or a spring.

7. The protection device applicable to the flange sealing surface of a pressure vessel according to claim 5, characterized in that, The guard plate unit, the inner convex block, and the fixing block are integrally formed of plastic. The tail-end fixing block is connected to the tail guard plate unit by screws, and the head-end fixing block is connected to the first guard plate unit by screws.

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