Novel isolating valve for nuclear power

Abstract

The utility model discloses a novel isolating valve for nuclear power, which belongs to the technical field of isolating valves and comprises an outer mounting disc, a first valve body is tightly attached to one side of the outer mounting disc through a sealing base plate, and a second valve body is tightly attached to the other side of the outer mounting disc through a sealing base plate. An assembling mechanism is arranged outside the first valve body and the second valve body, a mounting mechanism is arranged inside the first valve body and the second valve body, and a hydraulic mechanism is arranged inside the mounting mechanism. By arranging the hydraulic mechanism, the conical rubber head can be driven through the hydraulic action to seal the inner end of a pipeline, pressure is concentrated through linear contact or small-area contact of a conical surface, the sealing effect is improved, high pressure can be better borne, and the leakage risk is reduced; and the pressure of the conical rubber head on the inner wall of the pipeline can be controlled to adapt to different working condition requirements.

Description

Technical Field

[0001] This utility model relates to the field of isolation valve technology, and in particular to a novel isolation valve for nuclear power plants. Background Technology

[0002] With the development of the nuclear industry, nuclear power plant equipment is becoming increasingly larger, with higher parameters, higher performance, and higher reliability and safety requirements. Nuclear power valves are a large number of hydraulic devices in nuclear power plants, connecting more than 300 systems throughout the plant. They are key accessories for the safe operation of nuclear power plants. Isolation valves are commonly used in nuclear power equipment. Isolation valves are a type of on / off valve, which can only be in two states: open or closed. Unlike on / off valves, they generally have certain requirements for leakage levels, and their safety requirements are relatively higher than those of on / off valves. Due to their use in nuclear power plants, the isolation requirements are extremely high.

[0003] Existing isolation valves rely on the surface contact of cylindrical surfaces to achieve sealing through the compression and deformation of elastic materials when closing. The sealing pressure distribution is relatively uniform. However, under high pressure, leakage is easily caused by material deformation or surface roughness. The sealing stability and reliability are insufficient, making them unsuitable for high-pressure or high-precision sealing scenarios.

[0004] Therefore, there is an urgent need to provide a new type of isolation valve for nuclear power plants to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a new type of isolation valve for nuclear power.

[0006] To solve the above-mentioned technical problems, the present invention provides a novel isolation valve for nuclear power plants, comprising an outer mounting plate, wherein a first valve body is tightly attached to one side of the outer mounting plate via a sealing gasket, and a second valve body is tightly attached to the other side of the outer mounting plate via a sealing gasket. An assembly mechanism is provided outside the first and second valve bodies, and an installation mechanism is provided inside the first and second valve bodies. A hydraulic mechanism is provided inside the installation mechanism.

[0007] The present invention is further configured such that: the assembly mechanism includes an inlet pipe fixed to one end of the first valve body, an outlet pipe fixedly installed at one end of the second valve body, and an oil outlet pipe of the valve body fixedly installed inside both the first valve body and the second valve body.

[0008] Through the above technical solution, water flows into the first valve body through the inlet pipe, and water inside the second valve body is discharged through the outlet pipe. The hydraulic oil of the hydraulic equipment enters and exits through the oil outlet pipe of the valve body.

[0009] The present invention is further configured such that: valve body flanges are fixedly installed at the other ends of the first valve body and the second valve body, and fixing bolts are fixed to the internal threads of the mounting outer plate and the two valve body flanges.

[0010] The above technical solution uses fixing bolts to fix the mounting outer plate and the two valve body flanges, so that the first valve body, the second valve body and the mounting outer plate form an integral structure.

[0011] The present invention is further configured such that: the installation mechanism includes a first hydraulic cylinder disposed on one side of the installation outer plate, and a second hydraulic cylinder disposed on the other side of the installation outer plate, and a hydraulic cylinder flange is fixedly installed at one end of both the first hydraulic cylinder and the second hydraulic cylinder.

[0012] Through the above technical solution, the first and second oil cylinders provide space for hydraulic oil.

[0013] The present invention is further configured such that: an inner mounting plate is fixedly installed inside the outer mounting plate, and underwater bolts are fixed to the internal threads of the inner mounting plate and the two cylinder flanges.

[0014] Through the above technical solution, underwater bolts fix the mounting inner plate and the flanges of the two hydraulic cylinders, so that the mounting inner plate, the first hydraulic cylinder and the second hydraulic cylinder form an integral structure.

[0015] The present invention is further configured such that: the hydraulic mechanism includes a disc inlet pipe fixed inside the inner mounting disc and extending through and to the outside of the outer mounting disc at one end; the first and second cylinders are both fixedly installed with cylinder outlet pipes; and one end of the cylinder outlet pipe is fixedly connected to one end of the valve body outlet pipe through a connecting pipe.

[0016] Through the above technical solution, hydraulic oil enters the cylinder outlet pipe through the valve body outlet pipe, connecting pipe and cylinder outlet pipe, and hydraulic oil enters and exits the cylinder through the disc inlet pipe.

[0017] The present invention is further configured such that: a rubber piston is sealed inside the first oil cylinder, a piston rod is fixedly installed on one side of the rubber piston, and a conical rubber head is fixedly installed on one end of the piston rod.

[0018] Through the above technical solution, the rubber piston divides the internal space of the first oil cylinder into two. The hydraulic oil enters and exits through the oil outlet pipe of the oil cylinder and the oil inlet pipe of the disc, so that the rubber piston drives the piston rod and the conical rubber head to extend and retract through the first oil cylinder. The conical rubber head squeezes and seals the inner end of the water inlet pipe.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. This utility model, by incorporating a hydraulic mechanism, can drive a conical rubber head to seal the inner end of a pipe through hydraulic action. By utilizing the line contact or small-area contact of the conical surface to concentrate pressure, the sealing effect is improved, which can better withstand high pressure and reduce the risk of leakage. By adjusting the pressure of the hydraulic pump, the pressure of the conical rubber head on the inner wall of the pipe can be controlled to adapt to different working conditions.

[0021] 2. This utility model, by providing an assembly mechanism and an installation mechanism, allows for quick and accurate determination of component positions via flanges when maintenance of the isolation valve is required. This enables rapid disassembly and assembly of the isolation valve, allowing for the disassembly and maintenance of each component. Similarly, the assembly process is equally efficient, thereby reducing maintenance time and labor costs. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is an exploded structural diagram of the present invention;

[0024] Figure 3 This is a structural diagram of the outer mounting plate and the inner mounting plate of this utility model;

[0025] Figure 4 This is a cross-sectional structural diagram of the first hydraulic cylinder of this utility model.

[0026] In the diagram: 1. Outer mounting plate; 2. First valve body; 3. Second valve body; 4. Assembly mechanism; 401. Inlet pipe; 402. Outlet pipe; 403. Valve body oil outlet pipe; 404. Valve body flange; 405. Fixing bolt; 5. Installation mechanism; 501. First hydraulic cylinder; 502. Second hydraulic cylinder; 503. Cylinder flange; 504. Inner mounting plate; 505. Underwater bolt; 6. Hydraulic mechanism; 601. Disc inlet pipe; 602. Cylinder outlet pipe; 603. Rubber piston; 604. Piston rod; 605. Conical rubber head. Detailed Implementation

[0027] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0028] Please see Figures 1-4A novel isolation valve for nuclear power plants includes a mounting plate 1. A first valve body 2 is tightly fitted to one side of the mounting plate 1 via a sealing gasket, and a second valve body 3 is tightly fitted to the other side of the mounting plate 1 via a sealing gasket. An assembly mechanism 4 is provided externally to the first valve body 2 and the second valve body 3. The assembly mechanism 4 includes a water inlet pipe 401 fixed to one end of the first valve body 2, a water outlet pipe 402 fixedly installed to one end of the second valve body 3, and an oil outlet pipe 403, with one end penetrating through and extending to the outside, fixedly installed inside both the first valve body 2 and the second valve body 3. The other ends of the first valve body 2 and the second valve body 3 are both fixedly installed with valve body flanges 404. The mounting outer plate 1 and the two valve body flanges 404 are fixed with fixing bolts 405. Water flows into the first valve body 2 through the water inlet pipe 401, and the water inside the second valve body 3 is discharged through the water outlet pipe 402. The hydraulic oil of the hydraulic equipment enters and exits through the valve body oil outlet pipe 403. The mounting outer plate 1 and the two valve body flanges 404 are fixed by fixing bolts 405, so that the first valve body 2, the second valve body 3 and the mounting outer plate 1 form an integral structure.

[0029] like Figure 2 and Figure 3 As shown, the first valve body 2 and the second valve body 3 are provided with an installation mechanism 5. The installation mechanism 5 includes a first cylinder 501 located on one side of the outer mounting plate 1 and a second cylinder 502 located on the other side of the outer mounting plate 1. A cylinder flange 503 is fixedly installed at one end of both the first cylinder 501 and the second cylinder 502. An inner mounting plate 504 is fixedly installed inside the outer mounting plate 1. Underwater bolts 505 are fixed to the internal threads of the inner mounting plate 504 and the two cylinder flanges 503. The first cylinder 501 and the second cylinder 502 provide space for hydraulic oil. The underwater bolts 505 fix the inner mounting plate 504 and the two cylinder flanges 503, so that the inner mounting plate 504, the first cylinder 501 and the second cylinder 502 form an integral structure.

[0030] like Figures 2-4As shown, the mounting mechanism 5 is internally equipped with a hydraulic mechanism 6. The hydraulic mechanism 6 includes a disc oil inlet pipe 601 fixed inside the inner mounting disc 504 and extending through and to the outside of the outer mounting disc 1 at one end. Oil outlet pipes 602 are fixedly installed inside both the first cylinder 501 and the second cylinder 502. One end of the oil outlet pipe 602 is fixedly connected to one end of the valve body oil outlet pipe 403 via a connecting pipe. A rubber piston 603 is sealed inside the first cylinder 501. A piston rod 604 is fixedly installed on one side of the rubber piston 603, and one end of the piston rod 604 is fixed... A conical rubber head 605 is installed. Hydraulic oil enters the cylinder outlet pipe 602 through the valve body outlet pipe 403, the connecting pipe, and the cylinder outlet pipe 602. Hydraulic oil enters and exits the cylinder through the disc inlet pipe 601. The rubber piston 603 divides the internal space of the first cylinder 501 into two. The hydraulic oil enters and exits through the cylinder outlet pipe 602 and the disc inlet pipe 601, causing the rubber piston 603 to drive the piston rod 604 and the conical rubber head 605 to extend and retract through the first cylinder 501. The conical rubber head 605 squeezes and seals the inner end of the inlet pipe 401.

[0031] In use, water flows into the first valve body 2 through the inlet pipe 401, and water inside the second valve body 3 is discharged through the outlet pipe 402. When the isolation valve is closed, the valve body oil outlet pipe 403 and the disc oil inlet pipe 601 are connected to the hydraulic equipment. Hydraulic oil enters the first cylinder 501 and the second cylinder 502 through the disc oil inlet pipe 601 and the mounting inner disc 504, causing the rubber piston 603 to drive the piston rod 604 and the conical rubber head 605 to extend and retract through the cylinder. The conical rubber head 605 is driven to squeeze and seal the inner ends of the inlet pipe 401 and the outlet pipe 402, thus closing the isolation valve. When disassembling and assembling the isolation valve, the mounting outer disc 1 and the two valve body flanges 404 are disassembled and assembled using the fixing bolts 405, and the mounting inner disc 504 and the two cylinder flanges 503 are disassembled and assembled using the underwater bolts 505.

[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A novel isolation valve for nuclear power plants, comprising an outer mounting plate (1), characterized in that: One side of the mounting outer plate (1) is tightly fitted with a first valve body (2) through a sealing gasket, and the other side of the mounting outer plate (1) is tightly fitted with a second valve body (3) through a sealing gasket. An assembly mechanism (4) is provided on the outside of the first valve body (2) and the second valve body (3), and an installation mechanism (5) is provided inside the first valve body (2) and the second valve body (3). A hydraulic mechanism (6) is provided inside the installation mechanism (5).

2. The novel isolation valve for nuclear power plants according to claim 1, characterized in that: The assembly mechanism (4) includes an inlet pipe (401) fixed to one end of the first valve body (2), an outlet pipe (402) fixedly installed at one end of the second valve body (3), and an oil outlet pipe (403) with one end penetrating through and extending to the outside of the first valve body (2) and the second valve body (3) are both fixedly installed inside.

3. A novel isolation valve for nuclear power plants according to claim 2, characterized in that: The other ends of the first valve body (2) and the second valve body (3) are fixedly installed with valve body flanges (404), and the internal threads of the mounting outer plate (1) and the two valve body flanges (404) are fixed with fixing bolts (405).

4. A novel isolation valve for nuclear power plants according to claim 3, characterized in that: The installation mechanism (5) includes a first cylinder (501) disposed on one side of the installation outer plate (1) and a second cylinder (502) disposed on the other side of the installation outer plate (1). A cylinder flange (503) is fixedly installed at one end of both the first cylinder (501) and the second cylinder (502).

5. A novel isolation valve for nuclear power plants according to claim 4, characterized in that: An inner mounting plate (504) is fixedly installed inside the outer mounting plate (1), and underwater bolts (505) are fixed to the inner mounting plate (504) and the two cylinder flanges (503) inside.

6. A novel isolation valve for nuclear power plants according to claim 5, characterized in that: The hydraulic mechanism (6) includes a disc inlet pipe (601) fixed inside the mounting inner disc (504) and extending through and to the outside of the mounting outer disc (1). The first cylinder (501) and the second cylinder (502) are both fixedly installed with cylinder outlet pipes (602). One end of the cylinder outlet pipe (602) is fixedly connected to one end of the valve body outlet pipe (403) through a connecting pipe.

7. A novel isolation valve for nuclear power plants according to claim 6, characterized in that: The first cylinder (501) is internally sealed with a rubber piston (603), a piston rod (604) is fixedly installed on one side of the rubber piston (603), and a conical rubber head (605) is fixedly installed on one end of the piston rod (604).

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