High-safety control valve for nuclear power

Abstract

The utility model relates to the technical field of control valves, and discloses a high-safety control valve for nuclear power, which solves the problem of poorer sealing effect of the existing valve, and comprises a valve body, an outlet pipe and an inlet pipe are fixedly connected to two sides of the valve body respectively, a sealing mechanism is arranged in the valve body, a valve rod is arranged on the valve body, and the valve rod is connected with the outlet pipe. The bottom end of the valve rod is located in the valve body, the top end of the valve rod is located on the outer side of the valve body, the sealing mechanism comprises a partition plate fixed in the valve body, a circulation hole is formed in the partition plate, the top of the partition plate is fixedly connected with a top sealing ring, the top sealing ring is arranged at the circulation hole, and the bottom end of the valve rod is fixedly connected with a sealing block located over the top sealing ring. The outer diameter value of the sealing block is equal to the outer diameter value of the top sealing ring, and a communicating pipe is fixedly connected into the valve body. According to the valve, the sealing disc can move conveniently to be attached to the side sealing ring to block the communicating pipe, and therefore the sealing effect of the whole valve is improved through double sealing.

Description

Technical Field

[0001] The utility model belongs to the technical field of control valves, in particular to a high-safety control valve used for nuclear power. Background Art

[0002] Nuclear power high-safety control valves are indispensable and important equipment in nuclear power plants. Their function is to control, regulate and cut off the flow of media in nuclear power plants to ensure the safe operation of nuclear power plants. Such valves are usually manufactured with advanced materials and technologies, and have the characteristics of high strength, corrosion resistance, high temperature resistance and radiation resistance.

[0003] Existing valves used in nuclear power plants generally close the valve body only by the contact between the side of the piston and the communication hole between the two valve chambers. This method has a poor sealing effect and can only meet general needs. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a high-safety control valve for nuclear power, which effectively solves the problem of poor sealing effect of the current valve.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a high-safety control valve for nuclear power, comprising a valve body, an outlet pipe and an inlet pipe being fixedly connected to two sides of the valve body, a sealing mechanism being provided inside the valve body, and a valve stem being provided on the valve body, wherein the bottom end of the valve stem is located inside the valve body and the top end of the valve stem is located outside the valve body;

[0006] The sealing mechanism includes a partition fixed to the inside of the valve body, the partition is provided with a circulation hole, the top of the partition is fixedly connected to a top sealing ring, the top sealing ring is arranged at the circulation hole, the bottom end of the valve stem is fixedly connected to a sealing block located directly above the top sealing ring, the outer diameter value of the sealing block is equal to the outer diameter value of the top sealing ring, the inside of the valve body is fixedly connected to a connecting pipe, the inner diameter value of the connecting pipe is equal to the inner diameter value of the inlet pipe, and the connecting pipe is connected to the inlet pipe, the end of the connecting pipe away from the inlet pipe is fixedly connected to a side sealing ring, the inside of the valve body is provided with a sealing disk located below the partition, the outer diameter value of the sealing disk is equal to the outer diameter value of the side sealing ring, and the sealing disk and the side sealing ring are at the same height.

[0007] Preferably, the bottom of the partition is fixedly connected to a fixed plate, two guide rods are symmetrically fixedly connected between the fixed plate and the partition, a slide is movably sleeved between the two guide rods, and the outer side of the sealing disk is symmetrically fixedly connected to two side plates, and a connecting plate is fixedly connected between the two side plates and the slide.

[0008] Preferably, two L-shaped round rods are symmetrically fixedly connected between the bottom of the fixed plate and the partition plate, and a lifting plate is movably sleeved between the two L-shaped round rods.

[0009] Preferably, the outer side of the lifting plate is symmetrically rotatably connected to two movable rods, and the top ends of the two movable rods are rotatably connected to the bottom of the slide plate.

[0010] Preferably, the top of the lifting plate is fixedly connected to a bottom rod, and the top end of the bottom rod passes through the flow hole and is fixed to the bottom of the sealing block.

[0011] Preferably, a filter plate is fixedly installed inside the connecting pipe, and a plurality of dredging rods are evenly fixedly connected to the side of the sealing disk close to the connecting pipe. The inner diameter of the filter holes on the filter plate is equal to the outer diameter of the dredging rod, and the filter holes on the filter plate correspond one to one to the dredging rod.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This utility model, through the cooperation between the valve stem, the sealing block and the top sealing ring, can block the flow hole when the valve stem drives the sealing block to descend. The cooperation between the bottom rod, lifting plate, L-shaped round rod, movable rod, slide plate, guide rod, connecting plate and side plate facilitates the movement of the sealing disk and fits the side sealing ring to block the connecting pipe, thereby improving the sealing effect of the entire valve through double sealing.

[0014] 2. This new type can filter impurities by setting a filter plate in the connecting pipe. When the sealing disk moves and fits with the side sealing ring to seal the connecting pipe, the dredging rod can move to dredge the filter holes on the filter plate, thereby facilitating the cleaning of the filter plate to avoid clogging. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0016] In the attached figure:

[0017] Fig. 1 This is a schematic diagram of the structure of a high-safety control valve for nuclear power in accordance with the present invention;

[0018] Fig. 2 This is a schematic diagram of the cross-sectional structure of the valve body of the utility model;

[0019] Fig. 3 This is a schematic diagram of the sealing mechanism structure of the utility model;

[0020] Fig. 4 This is a schematic diagram of the partition structure of the utility model;

[0021] Fig. 5 This is a schematic diagram of the connecting pipe structure of the utility model;

[0022] Fig. 6The utility model discloses a sliding plate structure schematic diagram.

[0023] In the drawing: 1, valve body;2, sealing mechanism;201, partition;202, sealing block;203, flow-through hole;204, top sealing ring;205, bottom rod;206, communication pipe;207, sliding plate;208, lifting plate;209, connecting plate;2010, sealing disc;2011, dredging rod;2012, side plate;2013, side sealing ring;2014, filter plate;2015, movable rod;2016, L type round rod;2017, fixed plate;2018, guide rod;3, valve stem;4, outlet pipe;5, inlet pipe. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the utility model.

[0025] Embodiment one, by Figs. 1-2 The utility model relates to a kind of high safety control valve for nuclear power, including valve body 1, the two sides of valve body 1 are respectively fixedly connected with outlet pipe 4 and inlet pipe 5, the inside of valve body 1 is equipped with sealing mechanism 2, valve body 1 is equipped with valve stem 3, the bottom end of valve stem 3 is located in the inside of valve body 1, the top end of valve stem 3 is located at the outside of valve body 1.

[0026] Specifically, by Figs. 3-6It is given that the sealing mechanism 2 includes a partition 201 fixed to the inside of the valve body 1, and a flow hole 203 is provided on the partition 201. The top of the partition 201 is fixedly connected to a top sealing ring 204, and the top sealing ring 204 is arranged at the flow hole 203. The bottom end of the valve stem 3 is fixedly connected to a sealing block 202 located just above the top sealing ring 204, and the outer diameter value of the sealing block 202 is equal to the outer diameter value of the top sealing ring 204. The interior of the valve body 1 is fixedly connected to a connecting pipe 206, and the inner diameter value of the connecting pipe 206 is equal to the inner diameter value of the inlet pipe 5, and the connecting pipe 206 is connected to the inlet pipe 5. The end of the connecting pipe 206 away from the inlet pipe 5 is fixedly connected to a side sealing ring 2013. The interior of the valve body 1 is provided with a sealing disk 2010 located below the partition 201, and the outer diameter value of the sealing disk 2010 is equal to the outer diameter value of the side sealing ring 2013, and the sealing disk 2010 and the side sealing ring 2013 are at the same height. The bottom of the plate 201 is fixedly connected to a fixed plate 2017, and two guide rods 2018 are symmetrically fixedly connected between the fixed plate 2017 and the partition plate 201, and a slide plate 207 is movably connected between the two guide rods 2018. The outer side of the sealing disk 2010 is symmetrically fixedly connected to two side plates 2012, and a connecting plate 209 is fixedly connected between the two side plates 2012 and the slide plate 207. Two L-shaped round rods 2016 are symmetrically fixedly connected between the bottom of the fixed plate 2017 and the partition plate 201, and a lifting plate 208 is movably connected between the two L-shaped round rods 2016. The outer side of the lifting plate 208 is symmetrically rotatably connected to two movable rods 2015, and the top ends of the two movable rods 2015 are rotatably connected to the bottom of the slide plate 207. The top of the lifting plate 208 is fixedly connected to the bottom rod 205, and the top end of the bottom rod 205 passes through the flow hole 203 and is fixed to the bottom of the sealing block 202;

[0027] When in use, the sealing block 202 is first driven downward by the valve stem 3, and the lifting plate 208 is driven to slide downward along the two L-shaped round rods 2016 through the bottom rod 205, and the slide plate 207 is driven to slide along the two guide rods 2018 close to the bottom rod 205 through the two movable rods 2015, and then the two side plates 2012 are respectively driven to move through the two connecting plates 209, and at the same time the sealing disk 2010 moves horizontally close to the connecting pipe 206, when the sealing block 202 descends to fit with the top sealing ring 204, the flow hole 203 is blocked, and at the same time the sealing disk 2010 and the side sealing ring 2013 fit together to block the connecting pipe 206, and finally the sealing effect of the entire valve is improved through double sealing.

[0028] Specifically, by Figs. 4-5 It is shown that a filter plate 2014 is fixedly installed inside the connecting pipe 206, and a plurality of dredging rods 2011 are evenly fixedly connected to the side of the sealing disk 2010 close to the connecting pipe 206. The inner diameter of the filter holes on the filter plate 2014 is equal to the outer diameter of the dredging rods 2011, and the filter holes on the filter plate 2014 correspond one to one with the dredging rods 2011.

[0029] In use, first, the filter plate 2014 is arranged in the communication pipe 206, so that impurities can be filtered to avoid entering the valve body 1. When the sealing disc 2010 moves close to the communication pipe 206, the dredging rod 2011 is driven to move and insert into the filter hole on the filter plate 2014, dredging the filter hole to avoid blockage, and finally cleaning the filter plate 2014.

Claims

1. A high safety control valve for nuclear power, comprising a valve body (1), characterized in that: Both sides of the valve body (1) are fixedly connected with an outlet pipe (4) and an inlet pipe (5), respectively, the inside of the valve body (1) is provided with a sealing mechanism (2), the valve body (1) is provided with a valve rod (3), the bottom end of the valve rod (3) is located in the inside of the valve body (1), and the top end of the valve rod (3) is located outside the valve body (1); The sealing mechanism (2) comprises a partition plate (201) fixed in the inside of the valve body (1), the partition plate (201) is provided with a flow-through hole (203), the top of the partition plate (201) is fixedly connected with a top sealing ring (204), the top sealing ring (204) is arranged at the flow-through hole (203), the bottom end of the valve rod (3) is fixedly connected with a sealing block (202) located directly above the top sealing ring (204), the outer diameter value of the sealing block (202) is equal to that of the top sealing ring (204), the inside of the valve body (1) is fixedly connected with a communication pipe (206), the inner diameter value of the communication pipe (206) is equal to that of the inlet pipe (5), the communication pipe (206) is in communication with the inlet pipe (5), one end of the communication pipe (206) away from the inlet pipe (5) is fixedly connected with a side sealing ring (2013), and the inside of the valve body (1) is provided with a sealing disc (2010) located below the partition plate (201), the outer diameter value of the sealing disc (2010) is equal to that of the side sealing ring (2013), and the sealing disc (2010) and the side sealing ring (2013) are located at the same height.

2. A high safety control valve for nuclear power plants according to claim 1, characterized in that: The bottom of the partition plate (201) is fixedly connected with a fixed plate (2017), two guide rods (2018) are fixedly and symmetrically connected between the fixed plate (2017) and the partition plate (201), a sliding plate (207) is movably sleeved between the two guide rods (2018), two side plates (2012) are fixedly and symmetrically connected to the outside of the sealing disc (2010), and a connecting plate (209) is fixedly connected between each of the two side plates (2012) and the sliding plate (207).

3. A high safety control valve for nuclear power plants according to claim 2, characterized in that: The bottom of the fixed plate (2017) and the partition plate (201) are fixedly and symmetrically connected with two L-shaped round rods (2016), and a lifting plate (208) is movably sleeved between the two L-shaped round rods (2016).

4. A high safety control valve for nuclear power plants according to claim 3, characterized in that: The outside of the lifting plate (208) is fixedly and symmetrically connected with two movable rods (2015), and the top ends of the two movable rods (2015) are rotatably connected to the bottom of the sliding plate (207).

5. A high safety control valve for nuclear power plants according to claim 3, characterized in that: The top of the lifting plate (208) is fixedly connected with a bottom rod (205), and the top end of the bottom rod (205) penetrates through the flow-through hole (203) and is fixed to the bottom of the sealing block (202).

6. A high safety control valve for nuclear power plants according to claim 1, characterized in that: The inside of the communication pipe (206) is fixedly installed with a filter plate (2014), a plurality of dredging rods (2011) are uniformly fixedly connected to the side of the sealing disc (2010) close to the communication pipe (206), the inner diameter value of the filter hole on the filter plate (2014) is equal to the outer diameter value of the dredging rod (2011), and the filter hole on the filter plate (2014) corresponds to the dredging rod (2011) in one-to-one manner.

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