Straight-through type stop valve for ship

Abstract

The invention relates to the technical field of valves, in particular to a marine straight-through type stop valve which comprises a valve body and a valve rod, an installation assembly easy to maintain is installed on the valve body and comprises a fixing framework, a plurality of fan-shaped blocks capable of moving are arranged on the outer wall of the fixing framework, and the fan-shaped blocks are arranged on the valve rod. Arc-shaped pieces easy to disassemble and maintain are installed on the multiple fan-shaped blocks, and sleeving blocks used for being matched with the fan-shaped blocks and the arc-shaped pieces to form a valve clack are arranged on the fixed framework. The multiple arc-shaped pieces, the fan-shaped blocks and the fixing framework form a disc shape and replace a valve clack in a traditional valve, only the arc-shaped pieces can be replaced in the later period, and the situation that only the whole valve can be replaced when the valve cannot be tightly plugged due to the fact that the outer wall of the valve clack is excessively scoured can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, in particular to a marine straight-through stop valve. Background Art

[0002] As a type of valve widely used in the industrial field, the straight-through stop valve mainly cuts off the fluid in the valve by the linear movement of the valve disc inside the valve along the center line of the valve seat. In the hull system, it is the core component for controlling fluid flow and is suitable for large-diameter pipelines.

[0003] During operation, some existing straight-through stop valves control the fluid through the sealing surface formed between the valve disc and the valve seat in the valve. Since the fluid will continuously flush the outer wall of the valve disc when the valve is in the open state, if there are a large amount of particulate matter in the fluid during long-term use, these particulate matter will flush the outer wall of the valve disc, causing small grooves to appear in the valve disc, resulting in the valve disc being unable to fit tightly against the valve seat, resulting in leakage. Since the overall structure of the valve is relatively fixed and not easy to disassemble, the valve can often only be replaced as a whole, which is relatively wasteful. Summary of the Invention

[0004] The object of the present invention is to provide a marine straight-through stop valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a marine straight-through stop valve, comprising a valve body and a valve stem, wherein the valve body is equipped with an installation assembly that is easy to maintain; The mounting assembly includes a fixed frame, on the outer wall of which a plurality of displaceable sector blocks are provided, each of which is provided with an arc-shaped piece that is easy to disassemble and maintain, and a set block for cooperating with the sector blocks and the arc-shaped piece to form a valve flap is provided on the fixed frame; The set block is provided with a positioning component for facilitating positioning of the arc-shaped piece to be repaired; The arc-shaped pieces are each provided with a connection assembly capable of enhancing the connection strength between the arc-shaped pieces and the sector-shaped blocks.

[0006] The positioning assembly includes a reinforcement bar for reinforcing the overall strength of the set block, the reinforcement bar is provided with a rotatable rotating plate, the rotating plate is provided with a lifting rod, and the bottom end of the lifting rod is installed with a pressure plate that can support the arc piece to reinforce it.

[0007] A sliding block is slidably mounted on the pressure plate, and a positioning plate capable of limiting the movement of the arc-shaped piece is provided on the sliding block. A connecting spring for pushing the positioning plate to move downward is connected between the sliding block and the pressure plate.

[0008] The installation assembly also includes a cover plate installed on the valve body, and a sealing plate that is easy to disassemble and assemble is provided on the cover plate. The sealing plate and the cover plate are connected by a positioning assembly. The sealing plate is provided with a support screw that can limit the movement of the lifting rod, and the sealing plate is provided with two material removal components that are easy to remove the arc-shaped piece in the valve body.

[0009] The top of each arc-shaped piece is provided with two docking grooves that can be used in conjunction with the material taking component, and each docking groove is provided with a hidden notch.

[0010] The material taking component comprises a rotating rod placed on the sealing plate, and a docking plate which can be conveniently inserted into the docking groove to take out the arc-shaped piece is provided on the outer wall of the rotating rod.

[0011] The outer wall of the rotating rod is fixedly mounted with an arc-shaped piece for pulling the arc-shaped piece out of the valve body and a protrusion for monitoring the rotation range of the rotating rod. The protrusion on the rotating rod is provided with two limit blocks in the range of rotation of the rotating rod.

[0012] The connecting assembly includes a connecting plate for connecting the sector blocks and the arc-shaped pieces, and each connecting plate is provided with two locking screws for connecting the sector blocks or the arc-shaped pieces.

[0013] The positioning assembly includes two baffles on the sealing plate and the cover plate that are movably fitted together. The top ends of the sealing plate and the cover plate are fixedly mounted with two U-shaped frames for limiting the movable space of the baffles.

[0014] An anti-tilt block is fixedly installed on the top of the reinforcement strip to prevent the rotating plate from tilting excessively and being difficult to reset.

[0015] The set block is provided with a fan-shaped notch for facilitating the removal of the arc-shaped piece after disassembly, and the positioning component is located in the fan-shaped notch.

[0016] A sleeve is installed on the top of the set block, and a valve stem for forming a valve is installed in the sleeve.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention forms a disc shape through a plurality of arc-shaped pieces, fan-shaped blocks, and a fixed frame to replace the valve flap in a traditional valve. In the later stage, only the arc-shaped piece can be replaced, which can avoid the situation where the outer wall of the valve flap is excessively washed and cannot tightly seal the valve, and the entire valve has to be replaced.

[0018] After the valve disc closes the pipe outlet at the bottom of the valve body, the side baffle will simultaneously close the outlet on the right side of the valve body. At this time, the pipeline connected to the valve body outlet is opened to release some fluid to reduce the pressure at the outlet. The delivery pump installed on the pipeline connected to the pipe outlet at the bottom of the valve body is reversed to release some fluid. The arc-shaped piece that constitutes the valve disc can be repaired and replaced, avoiding the need to dismantle the entire valve for repair and replacement.

[0019] By controlling the fan-shaped block to adjust the position, until the hidden groove on the arc piece is directly below the positioning plate on the reinforcement strip, the positioning plate enters the hidden groove under the influence of the contraction of the connecting spring, restricting the arc piece from continuing to rotate, making it convenient to position the arc piece directly below the fan-shaped notch on the set block, and convenient to pull the arc piece out of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the assembly structure of the present invention.

[0022] Figure 3 This is a schematic diagram of the local structure of the installation component of the present invention.

[0023] Figure 4 It is a schematic diagram of the sealing plate structure of the present invention.

[0024] Figure 5 This is a schematic diagram of the cover structure of the present invention.

[0025] Figure 6 This is a schematic diagram of the fan-shaped piece installation structure of the present invention.

[0026] Figure 7 It is a schematic diagram of the fixed skeleton structure of the present invention.

[0027] Figure 8 Schematic diagram of the arc-shaped sheet structure of the present invention.

[0028] Figure 9 This is a schematic diagram of the set block structure of the present invention.

[0029] Figure 10 It is a schematic diagram of the rotating plate structure of the present invention.

[0030] In the figure: 1, valve body; 2, mounting assembly; 3, cover plate; 4, sealing plate; 5, blocking strip; 6, U-shaped frame; 7, supporting screw; 8, rotating rod; 9, butt joint plate; 10, limiting block; 11, lifting connecting rod; 12, sleeve; 13, side baffle; 14, sleeving block; 15, reinforcing strip; 16, sector block; 17, arc-shaped piece; 18, connecting plate; 19, locking screw; 20, butt joint groove; 21, fixed framework; 23, rotating plate; 24, lifting rod; 25, pressing plate; 26, telescopic connecting rod; 27, positioning plate; 28, sliding block; 29, connecting spring; 30, anti-tilting block. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0032] Please refer to Figures 1 to 10 The present application provides a technical solution: a marine straight-through type stop valve, comprising a valve body 1 and a mounting assembly 2 easy to maintain and replace fluid permeation, the mounting assembly 2 comprising a cover plate 3, the cover plate 3 and the valve body 1 are provided with a plurality of threaded holes, the cover plate 3 and the valve body 1 are assembled together by a plurality of threaded rods, and the cover plate 3 and the valve body 1 are tightly installed as a whole by nuts, the valve stem is arranged at the center of the cover plate 3, the top end of the cover plate 3 is provided with a positioning frame, the positioning frame and the valve stem are rotationally connected through a bearing, the rotation of the valve stem can facilitate the vertical lifting movement of the valve disc inside the valve body 1, the top end of the valve stem is fixedly installed with a baffle disc, the top end center of the baffle disc is fixedly installed with a threaded column, an annular handle and a nut are movably sleeved on the outer wall of the threaded column, the annular handle can be fixed to the top end of the baffle disc by the nut, and when the gap between the arc-shaped piece 17 and the inner wall of the valve body 1 appears in the later stage, causing the fluid in the valve body 1 to permeate upward and the arc-shaped piece 17 needs to be replaced, controlling the nut to reverse can facilitate the disassembly of the annular handle from the valve stem, and when the arc-shaped piece 17 is taken out from the inside of the valve body 1 for replacement, the vertical lifting space of the sealing plate 4 is avoided due to the disassembly of the annular handle, so that the arc-shaped piece 17 cannot be disassembled.

[0033] The cover plate 3 is provided with a fan-shaped opening, in which a sealing plate 4 is movably placed. The sealing plate 4 and the cover plate 3 are connected by a positioning assembly. The positioning assembly includes the sealing plate 4 and two baffles 5 that fit together movably on the cover plate 3. The tops of the sealing plate 4 and the cover plate 3 are fixed with two U-shaped frames 6 for limiting the movable space of the baffles 5. The width and height of the inner frame of the U-shaped frame 6 are the same as the width and height of the baffles 5. By inserting the baffles 5 into the sealing plate 4 and the U-shaped frame 6 on the cover plate 3 at the same time, the sealing plate 4 can be prevented from falling from the cover plate 3, and it is convenient to quickly remove the cover plate 3 when replacing the arc piece 17 later. The staff extends a handheld tool into the valve body 1 from the fan-shaped opening on the cover plate 3 to remove the locking screws 19 on the arc piece 17 and the fan block 16 located in the valve body 1.

[0034] The upper and lower ends of the sealing plate 4 are provided with threaded through holes, and support screws 7 for reinforcing the arc-shaped pieces 17 are provided in the threaded through holes. After several arc-shaped pieces 17 in the valve body 1 are taken out for replacement, the support screws 7 can be controlled to rotate downward and cooperate with the lifting rod 24 and the pressure plate 25 to support the arc-shaped pieces 17. If the fluid pressure in the valve body 1 is too large, at this time, by controlling the support screw 7 to rotate downward and fit the top of the lifting rod 24, the arc-shaped piece 17 in the fan-shaped notch on the set block 14 can be prevented from lacking reinforcement effect, and a longer support screw 7 can be replaced in real time according to the actual use effect, and several nuts are movably sheathed on the outer wall of the support screw 7. The waist of the support screw 7 is reinforced by the several nuts, which can prevent the middle section from bending and breaking during use due to the support screw 7 being too long.

[0035] The sealing plate 4 is provided with two material-retrieving components for easily removing the arc-shaped piece 17 in the valve body 1. The material-retrieving component includes a rotating rod 8. Two through holes with the same diameter as the rotating rod 8 are provided at the upper and lower ends of the sealing plate 4. The outer wall of the rotating rod 8 is fixedly installed with an arc-shaped piece 17 for lifting the arc-shaped piece 17 to remove it from the valve body 1 and a convex block for monitoring the rotation amplitude of the rotating rod 8. The arc-shaped piece 17 is located below the sealing plate 4, and the convex block is located above the sealing plate 4. The convex block on the rotating rod 8 is provided with two limit blocks within the range of rotation of the rotating rod 8. The limit block 10 is fixedly connected to the top plate of the sealing plate 4, and the rotation space of the protrusion and the rotating rod 8 is limited by the limit block 10. After the protrusion rotates and fits the limit block 10 close to the left side wall of the sealing plate 4, if the positioning plate 27 is in the hidden groove on the arc piece 17 at this time, the docking plate 9 can directly fall into the docking groove 20 on the arc piece 17, so that the arc piece 17 can be removed from the fan-shaped notch on the set block 14 and the valve body 1 can be pulled out for replacement through the cooperation of the docking plate 9, the rotating rod 8 and the sealing plate 4.

[0036] The arc piece 17 can be moved from the bottom end of the set block 14 to the top of the set block 14 through the fan-shaped notch and taken out from the fan-shaped opening on the cover plate 3, avoiding the need to disassemble the valve body 1 as a whole to replace the arc piece 17. After all the arc pieces 17 have been replaced, the set block 14 is fitted with the tops of several arc pieces 17 to limit the activity space of the arc piece 17, avoiding the arc piece 17 relying solely on the connecting plate 18 to provide a limiting effect during use, which is easy to cause the connecting plate 18 to be deformed due to excessive pressure in the valve body 1, causing the valve to leak. 4 is fixedly installed with a sleeve 12 at the top center position of the valve body 1 for driving the set block 14 to move up and down in the valve body 1. The sleeve 12 is movably mounted on the outer wall of the valve stem, and the part of the valve stem below the cover plate 3 and the inner wall of the sleeve 12 are provided with threads that can engage with each other, and a number of lifting connecting rods 11 are connected between the top plate of the set block 14 and the bottom end of the cover plate 3. The several lifting connecting rods 11 are composed of a telescopic rod and a vertical rod. The bottom end of the vertical rod is provided with an opening with the same diameter as the telescopic rod. In the process of controlling the rotation of the valve stem, the threads on the valve stem and the sleeve 12 cooperate with each other and are restricted by the lifting connecting rod 11 to prevent the sleeve 12 from rotating with the valve stem, and can make the sleeve 12 and the set block 14 move vertically up and down, so that the valve disc and the side baffle 13 close the pipeline in the valve body 1.

[0037] The cam 13 is fixedly mounted on the right side wall of the sleeve 12 for covering the pipe opening on the side wall of the valve body 1. The cam 13 can be tightly attached to the inner wall of the valve body 1. In use, it should be noted that the pipe opening at the bottom end of the valve body 1 is installed as the feed opening, and the pipe opening on the right side of the valve body 1 is the discharge opening. When the arc piece 17 needs to be repaired, after the pipe opening at the bottom end of the valve body 1 is closed by the valve disc, the side baffle 13 will synchronously close the discharge opening on the right side of the valve body 1. At this time, by opening the pipeline connected to the discharge opening of the valve body 1, some fluid is released to reduce the pressure at the discharge opening, and a delivery pump is installed on the pipeline connected to the pipe opening at the bottom end of the valve body 1 to reversely deliver and release some fluid, so as to avoid the fluid from leaking to the top end of the arc piece 17 through the gap between the side baffle 13 and the valve body 1 when replacing the arc piece 17, affecting the staff to replace the arc piece 17 and avoiding excessive pressure at the two pipe openings on the valve body 1.

[0038] The bottom end of the sleeve 12 is fixedly installed with a fixed frame 21, and the set block 14 is fixedly installed on the outer wall of the fixed frame 21. A number of sector blocks 16 are rotatably installed on the outer wall of the fixed frame 21. A number of toggle grooves are provided on the top of the sector block 16. The staff uses a tool to reach into the toggle groove to facilitate the rotation of the sector block 16. The sector block 16 is at the bottom end of the fixed frame 21, and a circular slide is provided on the outer wall of the fixed frame 21. A number of sliders are provided in the circular slide, and the sliders are fixedly connected to a sector block 16 respectively. The inner wall of the top of the circular slide is An anti-slip circular groove is provided, and an anti-slip block is provided in the anti-slip circular groove. The anti-slip blocks are respectively fixedly installed on the top of a slider, and an arc piece 17 is provided on the outer wall of a plurality of sector blocks 16. The arc piece 17 is provided with two docking grooves 20 for inserting the rotating rod 8 and the docking plate 9, and a hidden notch with the same height as the docking plate 9 is provided on the right inner wall of the docking groove 20. After the rotating rod 8 and the docking plate 9 are inserted into the docking groove 20, the rotating rod 8 is controlled to rotate until the protrusion fits the limit block 10, so that the docking plate 9 rotates straight in the docking groove 20. Until it is located in the hidden notch, at this time, the arc piece 17 to be replaced can be driven to move upward and removed from the valve body 1 by pulling the rotating rod 8. After the arc pieces 17 are attached to the sector block 16, the arc pieces 17, the sector block 16 and the fixed skeleton 21 form a disc shape (i.e., forming a valve flap in the valve) to control the flow of fluid in the valve body 1, and the tops of the arc pieces 17 and the sector block 16 are provided with hidden grooves, and the hidden grooves on the arc pieces 17 are provided with connecting components, which include components for connecting the sector block 16 and the arc piece. The connecting plate 18 of the piece 17 is provided with two locking screws 19 on the connecting plate 18. When the arc-shaped piece 17 and the sector block 16 are assembled together, the hidden grooves on the two are in a through state, and the local position of the connecting plate 18 will be in the hidden groove on the sector block 16. At this time, the locking screws 19 are controlled to pass through the connecting plate 18 and connect the inner walls of the bottom ends of the hidden grooves on the arc-shaped piece 17 and the sector block 16, so that the arc-shaped piece 17 and the sector block 16 can be installed as a whole, and it is convenient to quickly disassemble the arc-shaped piece 17 when it needs to be replaced in the later stage.

[0039] A positioning component that can locate the position of the arc piece 17 to be repaired is provided in the fan-shaped notch on the suit block 14, and adjustment grooves are provided on the front and rear inner walls of the fan-shaped notch on the suit block 14. The positioning component includes a reinforcement strip 15 slidably installed in the adjustment groove on the inner wall of the rear back of the fan-shaped notch to reinforce the suit block 14 to prevent its deformation. The reinforcement strip 15 can partially slide out of the adjustment groove and extend into another adjustment groove. At this time, the reinforcement strip 15 can provide a reinforcement support effect to the fan-shaped notch part of the suit block 14, thereby avoiding deformation of the fan-shaped notch part of the suit block 14 due to lack of reinforcement support during use.

[0040] The reinforcing bar 15 is provided with a groove, in which a rotating plate 23 is rotatably installed. The rotating plate 23 is provided with a through hole, and a lifting rod 24 that can vertically lift and lower movement is provided in the through hole. The lifting rod 24 consists of a support column and a cross plate, which is fixedly installed at the top of the support column, and a limiting strip is fixedly installed on the reinforcing bar 15, and the limiting strip fits the inner wall of the front end surface of the fan-shaped notch on the set block 14. At this time, the support screw 7 is just above the cross plate, and the bottom end of the support column of one of the structures of the lifting rod 24 is fixedly installed with a pressing plate 25 for reinforcing the arc piece 17. A T-shaped lifting slot is provided on the pressing plate 25, and a sliding block 28 that is adapted to its shape is slidably installed in the T-shaped lifting slot. A positioning plate 27 that can limit the rotation of the arc piece 17 is fixedly installed on the sliding block 28. A rubber gasket is fixedly sheathed on the outer wall of the positioning plate 27, so that it has a certain deformation effect to prevent it from affecting the lifting and lowering movement of the arc piece 17. The width of the positioning plate 27 is the same as that on the arc piece 17 The bottom end of the extension plate 25 is connected to the top end of the pressure plate 25 by a connecting spring 29, and a notch is provided on the support column of one of the structures constituting the lifting rod 24, so that the extension plate 25 is located in the notch on the lifting rod 24, thereby preventing the extension plate 25 from being affected by the connecting spring 29 due to the shape of the lifting rod 24. When the arc piece 17 needs to be used, the fan-shaped block 16 is first adjusted to its position with the help of a tool until the parts where the two adjacent arc pieces 17 are in contact are directly below the positioning plate 27 on the immovable reinforcement strip 15. At this time, by installing the sealing plate 4 on the cover plate 3, the support screw 7 can be controlled to rotate downward and close to the top end of the lifting rod 24. At this time, the pressure plate 25 under the lifting rod 24 can close to the top end of the two adjacent arc pieces 17, thereby preventing the arc piece 17 in the fan-shaped notch on the set block 14 from lacking limiting support, which is prone to deformation and reduces the service life.

[0041] The bottom end of the horizontal plate, one of the components of the lifting rod 24, is connected to the top plate of the rotating plate 23 through a telescopic connecting rod 26. The component structure and working principle of the telescopic connecting rod 26 are the same as those of the lifting connecting rod 11 and will not be described in detail here.

[0042] An anti-tilt block 30 is provided on the top plate of the reinforcement strip 15 to prevent the rotating plate 23 from rotating excessively. When the arc-shaped piece 17 is removed from the valve body 1, the moving arc-shaped piece 17 will push the rotating plate 23 to rotate upward and fit into the anti-tilt block 30, so as to avoid the subsequent replacement arc-shaped piece 17 from being unable to contact the positioning plate 27 when moving downward, so that the rotating plate 23 can automatically reset.

[0043] When the present invention is in use, when the arc-shaped piece 17 needs to be replaced, the sealing plate 4 is removed from the cover plate 3, and the sector block 16 is rotated with the help of a tool (such as a screwdriver) until a connecting plate 18 is rotated to be directly below the sector-shaped notch on the set block 14, and the locking screw 19 connected to the sector block 16 is screwed with a screwdriver to a state where it is disconnected from the sector block 16, and then the sector block 16 is adjusted to a position with the help of a tool (such as a screwdriver) until the hidden groove on the arc-shaped piece 17 is directly below the positioning plate 27 on the immovable reinforcement strip 15 (that is, the limit strip on the reinforcement strip 15 is in contact with the inner wall of the front end surface of the sector-shaped notch on the set block 14), and the positioning plate 27 is affected by the contraction of the connecting spring 29 Entering the hidden groove, limiting the arc piece 17 from continuing to rotate, at this time, install the sealing plate 4 in the fan-shaped opening on the cover plate 3, control the rotating rod 8 to move downward and insert it into the docking groove 20 on the arc piece 17, and control the rotating rod 8 to rotate until the docking plate 9 is inserted into the hidden notch in the docking groove 20, you can pull the sealing plate 4 upward by holding the U-shaped frame 6, and drive the arc piece 17 to move upward until it is removed from the valve body 1, and then reinstall a new arc piece 17 into the valve body 1 until all the arc pieces 17 are replaced to form a new valve disc, and before use, you must pay attention to controlling the rotation of the sector block 16 to avoid the top of a single arc piece 17 being completely exposed in the fan-shaped notch on the set block 14.

[0044] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A marine straight-through stop valve, comprising a valve body and a valve stem, characterized in that: The valve body is equipped with a mounting assembly that is easy to maintain; The mounting assembly includes a fixed frame, on the outer wall of which a plurality of displaceable sector blocks are provided, each of which is provided with an arc-shaped piece that is easy to disassemble and maintain, and a set block for cooperating with the sector blocks and the arc-shaped piece to form a valve flap is provided on the fixed frame; The set block is provided with a positioning component for facilitating the positioning of the arc-shaped piece to be repaired; The arc-shaped pieces are each provided with a connection assembly capable of enhancing the connection strength between the arc-shaped pieces and the sector-shaped blocks.

2. A marine straight-through stop valve according to claim 1, characterized in that: The positioning assembly includes a reinforcement bar for reinforcing the overall strength of the set block, the reinforcement bar is provided with a rotatable rotating plate, the rotating plate is provided with a lifting rod, and the bottom end of the lifting rod is installed with a pressure plate that can support the arc piece to reinforce it.

3. A marine straight-through stop valve according to claim 2, characterized in that: A sliding block is slidably mounted on the pressure plate, and a positioning plate capable of limiting the movement of the arc-shaped piece is provided on the sliding block. A connecting spring for pushing the positioning plate to move downward is connected between the sliding block and the pressure plate.

4. A marine straight-through stop valve according to claim 1, characterized in that: The installation assembly also includes a cover plate installed on the valve body, and a sealing plate that is easy to disassemble and assemble is provided on the cover plate. The sealing plate and the cover plate are connected by a positioning assembly. The sealing plate is provided with a support screw that can limit the movement of the lifting rod, and the sealing plate is provided with two material removal components that are easy to remove the arc-shaped piece in the valve body.

5. A marine straight-through stop valve according to claim 1, characterized in that: The top of each arc-shaped piece is provided with two docking grooves that can be used in conjunction with the material taking component, and each docking groove is provided with a hidden notch.

6. A marine straight-through stop valve according to claim 4, characterized in that: The material taking component comprises a rotating rod placed on the sealing plate, and a docking plate which can be conveniently inserted into the docking groove to take out the arc-shaped piece is provided on the outer wall of the rotating rod.

7. A marine straight-through stop valve according to claim 6, characterized in that: The outer wall of the rotating rod is fixedly mounted with an arc-shaped piece for pulling the arc-shaped piece out of the valve body and a protrusion for monitoring the rotation range of the rotating rod. The protrusion on the rotating rod is provided with two limit blocks in the range of rotation of the rotating rod.

8. A marine straight-through stop valve according to claim 1, characterized in that: The connecting assembly includes a connecting plate for connecting the sector blocks and the arc-shaped pieces, and each connecting plate is provided with two locking screws for connecting the sector blocks or the arc-shaped pieces.

9. A marine straight-through stop valve according to claim 4, characterized in that: The positioning assembly includes two baffles on the sealing plate and the cover plate that are movably fitted together. The top ends of the sealing plate and the cover plate are fixedly mounted with two U-shaped frames for limiting the movable space of the baffles.

10. A marine straight-through stop valve according to claim 2, characterized in that: An anti-tilt block is fixedly installed on the top of the reinforcement strip to prevent the rotating plate from tilting excessively and being difficult to reset.

11. A marine straight-through stop valve according to claim 1, characterized in that: The set block is provided with a fan-shaped notch for facilitating the removal of the arc-shaped piece after disassembly, and the positioning component is located in the fan-shaped notch.

12. A marine straight-through stop valve according to claim 1, characterized in that: A sleeve is installed on the top of the set block, and a valve stem for forming a valve is installed in the sleeve.

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