A marine straight-through stop valve

Abstract

The application 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, the valve body is provided with an installation assembly easy to maintain, the installation assembly comprises a fixed framework, a plurality of displaceable sector blocks are arranged on the outer wall of the fixed framework, an arc-shaped piece easy to disassemble and maintain is arranged on each of the sector blocks, and a sleeving block for cooperating with the sector blocks and the arc-shaped pieces to form a valve flap is arranged on the fixed framework; the valve flap in the traditional valve is replaced by the disc-shaped structure composed of the plurality of arc-shaped pieces, the sector blocks and the fixed framework, in the later period, only the arc-shaped pieces need to be replaced, and the entire valve can be replaced only when the valve flap cannot tightly seal the valve due to the over-washed outer wall of the valve flap.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a ship straight-through stop valve. BACKGROUND

[0002] The straight-through stop valve is a valve type widely used in the industrial field, which mainly realizes the cutting of fluid in the valve through the linear motion of the valve disc along the center line of the valve seat. In the ship system, it is a core component for controlling fluid flow and is suitable for large-diameter pipelines.

[0003] Some existing straight-through stop valves realize the control of fluid through the sealing surface formed between the valve disc and the valve seat in the working process. However, when the valve is in the open state, the fluid will continuously scour the outer wall of the valve disc. In the long-term use process, if there are a large number of particulate matters in the fluid, these particulate matters will scour the outer wall of the valve disc to cause the valve disc to have small grooves, so that the valve disc cannot tightly fit the valve seat, and liquid leakage occurs. Since the overall structure of the valve is relatively fixed and is not easy to disassemble, the valve can only be replaced as a whole at this time, which is relatively wasteful. SUMMARY

[0004] The purpose of the present application is to provide a ship straight-through stop valve to solve the problems raised in the background art.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a ship straight-through stop valve, comprising a valve body and a valve stem, the valve body is provided with an installation assembly which is easy to maintain;

[0006] The installation assembly comprises a fixed framework, a plurality of displaceable sector blocks are arranged on the outer wall of the fixed framework, a plurality of arc-shaped pieces which are easy to disassemble and maintain are arranged on the sector blocks, and a sleeving block for forming a valve disc in cooperation with the sector blocks and the arc-shaped pieces is arranged on the fixed framework;

[0007] The sleeving block is provided with a positioning assembly for positioning the position of the arc-shaped piece to be maintained;

[0008] The arc-shaped piece is provided with a connecting assembly which can enhance the connecting strength of the arc-shaped piece and the sector block.

[0009] The positioning assembly comprises a reinforcing strip for reinforcing the overall strength of the sleeving block, a rotatable rotating plate is arranged on the reinforcing strip, a lifting rod is arranged on the rotating plate, and a pressing plate for supporting and reinforcing the arc-shaped piece is arranged at the bottom end of the lifting rod.

[0010] The sliding block is slidably arranged on the pressing plate, a positioning plate capable of limiting the movement of the arc-shaped piece is arranged on the sliding block, and a connecting spring for pushing the positioning plate to move downward is connected between the sliding block and the pressing plate.

[0011] The mounting assembly further comprises a cover plate mounted on the valve body, an easily disassembled sealing plate is arranged on the cover plate, the sealing plate and the cover plate are connected through a positioning assembly, a supporting screw capable of limiting the movement of the lifting rod is arranged on the sealing plate, and two material taking assemblies capable of taking out the arc-shaped pieces in the valve body are arranged on the sealing plate.

[0012] The top end of the arc-shaped piece is provided with two docking grooves capable of cooperating with the material taking assemblies, and the docking grooves are provided with hidden notches.

[0013] The material taking assembly comprises a rotating rod arranged on the sealing plate, and a docking plate capable of facilitating the extension into the docking groove to take out the arc-shaped piece is arranged on the outer wall of the rotating rod.

[0014] The outer wall of the rotating rod is fixedly provided with an arc-shaped piece for lifting the arc-shaped piece to take it out of the valve body and a convex block for monitoring the rotation amplitude of the rotating rod, and two limiting blocks are arranged in the range of the convex block following the rotation of the rotating rod.

[0015] The connecting assembly comprises a connecting plate for connecting the sector-shaped blocks and the arc-shaped pieces, and two locking screw rods for connecting the sector-shaped blocks or the arc-shaped pieces are arranged on the connecting plate.

[0016] The positioning assembly comprises two blocking strips jointly moving and adhering on the sealing plate and the cover plate, and two U-shaped frames for limiting the movement space of the blocking strips are fixedly arranged at the top end of the sealing plate and the cover plate.

[0017] The top end of the reinforcing strip is fixedly provided with an anti-tilting block for preventing the rotating plate from tilting excessively and not being easy to reset.

[0018] The sleeve block is provided with a sector-shaped notch for taking out the arc-shaped piece after disassembly, and the positioning assembly is located in the sector-shaped notch.

[0019] The top end of the sleeve block is provided with a sleeve, and a valve rod for composing a valve is arranged in the sleeve.

[0020] Compared with the prior art, the beneficial effects of the present application are:

[0021] The present application comprises a plurality of arc-shaped pieces, sector-shaped blocks and fixed frameworks to form a disc shape and replace the valve clack in the traditional valve, and in the later stage, only the arc-shaped pieces need to be replaced, so that the valve can be replaced only when the outer wall of the valve clack is excessively washed and cannot tightly seal the valve.

[0022] When the valve body bottom end pipe orifice is closed by the valve disc, the right side discharge port of the valve body is closed synchronously by the side baffle, at this time, the pipeline connected with the valve body discharge port is opened to discharge part of the fluid, reduce the pressure of the discharge port, and install a delivery pump on the pipeline connected with the valve body bottom end pipe orifice to reversely deliver and discharge part of the fluid, so that the arc-shaped piece of the valve disc can be repaired and replaced, and the valve is not needed to be disassembled for repair and replacement.

[0023] By controlling the adjustment position of the fan-shaped block, until the hidden groove on the arc-shaped piece is below the positioning plate on the reinforcing strip, the positioning plate is affected by the contraction of the connecting spring and enters the hidden groove to limit the rotation of the arc-shaped piece, the arc-shaped piece is conveniently positioned below the fan-shaped notch on the sleeving block, and the arc-shaped piece is conveniently pulled out of the valve body. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic view of the overall structure of the application.

[0025] Figure 2 It is a schematic view of the installation assembly structure of the application.

[0026] Figure 3 It is a schematic view of the local structure of the installation assembly of the application.

[0027] Figure 4 It is a schematic view of the sealing plate structure of the application.

[0028] Figure 5 It is a schematic view of the cover plate structure of the application.

[0029] Figure 6 It is a schematic view of the fan-shaped piece installation structure of the application.

[0030] Figure 7 It is a schematic view of the fixed framework structure of the application.

[0031] Figure 8 It is a schematic view of the arc-shaped piece structure of the application.

[0032] Figure 9 It is a schematic view of the sleeving block structure of the application.

[0033] Figure 10 It is a schematic view of the rotating plate structure of the application.

[0034] 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

[0035] 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.

[0036] 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.

[0037] The cover plate 3 is provided with a fan-shaped opening, and the sealing plate 4 is movably arranged in the fan-shaped opening. The sealing plate 4 and the cover plate 3 are connected through a positioning assembly. The positioning assembly comprises two blocking strips 5 movably arranged on the sealing plate 4 and the cover plate 3. The top end of the sealing plate 4 and the cover plate 3 is fixedly provided with two U-shaped frames 6 for limiting the movement space of the blocking strips 5. The inner frame of the U-shaped frame 6 has the same width and height as the blocking strip 5. By inserting the blocking strip 5 into the U-shaped frame 6 on the sealing plate 4 and the cover plate 3, the sealing plate 4 can be prevented from falling off the cover plate 3. When the arc-shaped piece 17 is replaced later, the cover plate 3 can be quickly disassembled. The staff member holds a tool and inserts it into the valve body 1 through the fan-shaped opening on the cover plate 3. The locking screw 19 on the arc-shaped piece 17 and the fan-shaped block 16 in the valve body 1 is disassembled.

[0038] The upper and lower ends of the sealing plate 4 are provided with threaded through holes. The threaded through holes are provided with support screws 7 for reinforcing the arc-shaped piece 17. After the arc-shaped piece 17 in the valve body 1 is removed and replaced, the support screw 7 is controlled to rotate downward, and the lifting rod 24 and the pressing plate 25 are used to support the arc-shaped piece 17. If the fluid pressure in the valve body 1 is too large, the support screw 7 is controlled to rotate downward and abut against the top end of the lifting rod 24. The arc-shaped piece 17 in the fan-shaped notch on the sleeving block 14 can be prevented from lacking reinforcement. According to the actual use effect, a longer support screw 7 can be used in real time. A plurality of nuts are movably sleeved on the outer wall of the support screw 7. The waist of the support screw 7 is reinforced by the nuts. The middle section of the support screw 7 can be prevented from bending and breaking during use.

[0039] The sealing plate 4 is provided with two material taking assemblies for easily taking out the arc-shaped piece 17 in the valve body 1. The material taking assembly comprises a rotating rod 8. The upper and lower ends of the sealing plate 4 are provided with two through holes with the same diameter as the rotating rod 8. The outer wall of the rotating rod 8 is fixedly provided with an arc-shaped piece 17 for lifting the arc-shaped piece 17 to take it out of the valve body 1 and a protrusion for monitoring the rotation amplitude of the rotating rod 8. The arc-shaped piece 17 is below the sealing plate 4, and the protrusion is above the sealing plate 4. The protrusion on the rotating rod 8 is provided with two limit blocks 10 within the range of rotation of the rotating rod 8. The bottom end of the limit block 10 is fixedly connected to the top plate of the sealing plate 4. The rotation space of the protrusion and the rotating rod 8 is limited by the limit block 10. When the protrusion rotates and abuts against the limit block 10 close to the left side wall of the sealing plate 4, the positioning plate 27 is in the hidden groove on the arc-shaped piece 17. The butt plate 9 can directly fall into the butt groove 20 on the arc-shaped piece 17. The arc-shaped piece 17 can be taken out of the fan-shaped notch on the sleeving block 14 and pulled out of the valve body 1 for replacement by cooperation of the butt plate 9, the rotating rod 8 and the sealing plate 4.

[0040] The valve body 1 is movably placed with a sleeve block 14 facilitating the dismounting of the arc-shaped piece 17 to be replaced, the sleeve block 14 is provided with a fan-shaped notch, the outermost periphery of the fan-shaped notch can allow the arc-shaped piece 17 to pass vertically therethrough, the arc-shaped piece 17 can be moved from the bottom end of the sleeve block 14 to above the sleeve 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-shaped piece 17, and after the complete replacement of the arc-shaped piece 17, the sleeve block 14 is attached to the top ends of the plurality of arc-shaped pieces 17, which can limit the movement space of the arc-shaped piece 17, avoiding the situation that the arc-shaped piece 17 only relies on the limiting effect of the connecting plate 18 during use, which may cause the connecting plate 18 to deform due to excessive pressure in the valve body 1, resulting in water leakage of the valve. The top end center of the sleeve block 14 is fixedly installed with a sleeve 12 for driving the sleeve block 14 to move up and down in the valve body 1, the sleeve 12 is movably sleeved on the outer wall of the valve stem, and the valve stem is provided with threads on the inner wall of the part below the cover plate 3 and the sleeve 12, which can be engaged with each other. A plurality of lifting connecting rods 11 are connected between the top plate of the sleeve block 14 and the bottom end of the cover plate 3, and the plurality of lifting connecting rods 11 are each composed of an extension rod and a vertical rod, and the bottom end of the vertical rod is provided with an opening having the same diameter as the extension rod. During the rotation control of the valve stem, the threads on the valve stem and the sleeve 12 are matched with each other, and the sleeve 12 is limited from rotating with the valve stem by the lifting connecting rods 11, and the sleeve 12 and the sleeve block 14 can move vertically, so that the valve flap and the side baffle 13 can close the pipeline in the valve body 1.

[0041] The right side wall of the sleeve 12 is fixedly installed with a side baffle 13 for shielding the pipe opening on the side wall of the valve body 1, the side baffle 13 can tightly abut against the inner wall of the valve body 1, and during use, it should be noted that the pipe opening at the bottom end of the valve body 1 is installed as a feed inlet, and the pipe opening on the right side of the valve body 1 is a discharge outlet. When the arc-shaped piece 17 needs to be repaired, the valve flap is used to close the pipe opening at the bottom end of the valve body 1, at this time the side baffle 13 will synchronously close the discharge outlet on the right side of the valve body 1, at this time the pipeline connected with the discharge outlet of the valve body 1 is opened to discharge part of the fluid, thereby reducing the pressure of the discharge outlet, and a delivery pump installed on the pipeline connected with the bottom end of the valve body 1 is reversed to deliver part of the fluid, thereby avoiding the situation that the fluid may leak through the gap between the side baffle 13 and the valve body 1 to the top end of the arc-shaped piece 17 during the replacement of the arc-shaped piece 17, affecting the replacement of the arc-shaped piece 17 by the worker, and avoiding the situation that the pressure of the two pipe openings on the valve body 1 is too high.

[0042] The bottom end of the sleeve 12 is fixedly provided with a fixed framework 21, the sleeve block 14 is fixedly provided on the outer wall of the fixed framework 21, a plurality of sector blocks 16 are rotatably provided on the outer wall of the fixed framework 21, the top end of each sector block 16 is provided with a plurality of actuating grooves, the staff can conveniently push the sector block 16 to rotate by inserting a tool into the actuating groove, the sector block 16 is located at the bottom end of the fixed framework 21, a circular sliding groove is provided on the outer wall of the fixed framework 21, a plurality of sliding blocks are provided in the circular sliding groove, each sliding block is fixedly connected with a sector block 16, a anti-dropping circular groove is provided on the top end inner wall of the circular sliding groove, a anti-dropping block is provided in the anti-dropping circular groove, the anti-dropping block is fixedly provided on the top end of each sliding block, an arc-shaped piece 17 is provided on the outer wall of each sector block 16, two butt joints 20 are provided on the arc-shaped piece 17, the butt joint 9 and the butt joint 20 are used for inserting the rotating rod 8 and the butt joint plate 9, a hidden notch is provided on the right inner wall of the butt joint 20, the height of the hidden notch is same as that of the butt joint plate 9, after the rotating rod 8 and the butt joint plate 9 are inserted into the butt joint 20, the rotating rod 8 is controlled to rotate until the protruding block is in contact with the limiting block 10, the butt joint plate 9 is controlled to rotate in the butt joint 20 until it is located in the hidden notch, at this time, the rotating rod 8 can be pulled up to rotate upward, the arc-shaped piece 17 to be replaced is driven to move upward and is taken out from the valve body 1, after the arc-shaped pieces 17 are in contact with the sector blocks 16, the arc-shaped pieces 17, the sector blocks 16 and the fixed framework 21 form a disc shape (i.e. a valve flap in the valve), the flow of fluid in the valve body 1 is controlled, the top end of each arc-shaped piece 17 and sector block 16 is provided with a hidden groove, a connecting assembly is provided in the hidden groove of the arc-shaped piece 17, the connecting assembly comprises a connecting plate 18 used for connecting the sector block 16 and the arc-shaped piece 17, two locking screws 19 are provided on the connecting plate 18, when the arc-shaped piece 17 and the sector block 16 are assembled together, the hidden grooves on the arc-shaped piece 17 and the sector block 16 are in communication, the local position of the connecting plate 18 is in the hidden groove on the sector block 16, at this time, the locking screw 19 is controlled to penetrate the connecting plate 18 and connect the bottom end inner wall of the hidden grooves on the arc-shaped piece 17 and the sector block 16, the arc-shaped piece 17 and the sector block 16 are installed as a whole, when the arc-shaped piece 17 needs to be replaced in the later period, the arc-shaped piece 17 can be quickly disassembled.

[0043] A positioning assembly capable of positioning the position of the arc-shaped piece 17 to be repaired is provided in the sector notch on the sleeve block 14, the inner walls of the front and rear sides of the sector notch on the sleeve block 14 are provided with adjusting sliding grooves, the positioning assembly comprises a reinforcing strip 15 slidably provided in the adjusting sliding groove on the back inner wall of the sector notch, the reinforcing strip 15 is used for reinforcing the sleeve block 14 to prevent it from deforming, the reinforcing strip 15 can partially slide out of the adjusting sliding groove and extend into another adjusting sliding groove, at this time, the reinforcing strip 15 can provide reinforcing support effect for the sector notch part of the sleeve block 14, avoiding that the sector notch part of the sleeve block 14 is deformed due to lack of reinforcing support in the use process.

[0044] The reinforcing strip 15 is provided with a groove, a rotating plate 23 is rotatably installed in the groove, the rotating plate 23 is provided with a through hole, a lifting rod 24 capable of vertically lifting is arranged in the through hole, the lifting rod 24 is composed of a support column and a horizontal plate, the horizontal plate is fixedly installed at the top end of the support column, and the reinforcing strip 15 is fixedly installed with a limiting strip which is attached to the inner wall of the front end face of the fan-shaped notch on the sleeving block 14, at this time the support screw 7 is located directly above the horizontal plate, the bottom end of the support column of the lifting rod 24 is fixedly installed with a pressing plate 25 for reinforcing the arc-shaped sheet 17, the pressing plate 25 is provided with a T-shaped lifting sliding groove, a sliding block 28 matched with the T-shaped lifting sliding groove is slidingly installed in the T-shaped lifting sliding groove, the sliding block 28 is fixedly installed with a positioning plate 27 capable of limiting the rotation of the arc-shaped sheet 17, a rubber pad is fixedly sleeved on the outer wall of the positioning plate 27, so that the positioning plate 27 has a certain deformation effect, and the lifting movement of the arc-shaped sheet 17 is avoided, the width size of the positioning plate 27 is the same as the width size of the hidden groove on the arc-shaped sheet 17, the sliding block 28 is provided with an extension protruding plate, the bottom end of the extension protruding plate is connected with the top end of the pressing plate 25 through a connecting spring 29, and the support column of the lifting rod 24 is provided with a cutout, the extension protruding plate is located in the cutout on the lifting rod 24, so that the extension protruding plate cannot be lifted by the connecting spring 29 due to the shape of the lifting rod 24, when the arc-shaped sheet 17 needs to be used, the fan-shaped block 16 is first adjusted in position by means of a tool, until the positions of the two adjacent arc-shaped sheets 17 are attached to the positioning plate 27 below the reinforcing strip 15 which cannot be moved, at this time the pressing plate 25 below the lifting rod 24 can be tightly attached to the top end of the two adjacent arc-shaped sheets 17, so that the arc-shaped sheet 17 in the fan-shaped notch on the sleeving block 14 is not lack of limiting support, and deformation is avoided, and the service life is reduced.

[0045] The bottom end of the horizontal plate of the lifting rod 24 and the top plate of the rotating plate 23 are connected through the telescopic connecting rod 26, and the telescopic connecting rod 26 has the same structure and working principle as the lifting connecting rod 11, and will not be described in detail here.

[0046] The top plate of the reinforcing strip 15 is provided with an anti-tilting block 30 for preventing the rotating plate 23 from rotating excessively, in the process of taking out the arc-shaped sheet 17 from the valve body 1, the arc-shaped sheet 17 in the moving process pushes the rotating plate 23 to rotate upward and attach to the anti-tilting block 30, so that when the subsequently replaced arc-shaped sheet 17 moves downward, the positioning plate 27 cannot be contacted, and the rotating plate 23 can be automatically reset.

[0047] When the arc-shaped piece 17 needs to be replaced, the sealing plate 4 is removed from the cover plate 3, the sector block 16 is rotated by means of a tool (such as a screwdriver) until one connecting plate 18 is rotated to be directly below the sector-shaped notch on the sleeving block 14, the locking screw 19 connected with the sector block 16 is screwed to be disconnected with the sector block 16 by means of a screwdriver, the sector block 16 is adjusted in position by means 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 reinforcing strip 15 (i.e. the limiting strip on the reinforcing strip 15 is attached to the inner wall of the front end surface of the sector-shaped notch on the sleeving block 14), the positioning plate 27 is affected by the contraction of the connecting spring 29 to enter the hidden groove, and the arc-shaped piece 17 is limited to continue to rotate, at this time the sealing plate 4 is installed in the sector-shaped opening on the cover plate 3, the rotating rod 8 is controlled to move downward and is inserted into the butt joint groove 20 on the arc-shaped piece 17, and the rotating rod 8 is controlled to rotate until the butt joint plate 9 is inserted into the hidden notch in the butt joint groove 20, the sealing plate 4 can be pulled upward by holding the U-shaped frame 6, the arc-shaped piece 17 can be driven to move upward until it is taken out of the valve body 1, a new arc-shaped piece 17 is reinstalled into the valve body 1, and a new valve flap is formed after all the arc-shaped pieces 17 are replaced, and before use, attention should be paid to control the rotation of the sector block 16 to avoid that the top ends of the single arc-shaped pieces 17 are all exposed in the sector-shaped notch on the sleeving block 14.

[0048] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A marine straight-through gate valve, comprising a valve body and a valve stem, characterized in that: The valve body is equipped with a mounting assembly that facilitates maintenance. The installation assembly includes a fixed frame, on the outer wall of which are provided several movable sector blocks, and each sector block is equipped with an arc-shaped piece that is easy to disassemble and maintain. The fixed frame is provided with a fitting block for cooperating with the sector blocks and arc-shaped pieces to form a valve disc. The kit block is equipped with a positioning component for conveniently locating the position of the arc-shaped piece to be repaired. The positioning component includes a reinforcing strip to strengthen the overall strength of the kit block. The reinforcing strip is equipped with a rotating plate that can rotate. The rotating plate is equipped with a lifting rod. The bottom end of the lifting rod is equipped with a pressure plate that can support and reinforce the arc-shaped piece. A sliding block is slidably installed on the pressure plate. The sliding block is equipped with a positioning plate that can restrict the movement of the arc-shaped piece. A connecting spring for pushing the positioning plate downward is connected between the sliding block and the pressure plate. Each of the arc-shaped pieces is provided with a connecting component that can enhance the connection strength between it and the sector block; The installation assembly also includes a cover plate mounted on the valve body. The cover plate is provided with an easily detachable sealing 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. The sealing plate is provided with two material-retrieving components that facilitate the removal of the arc-shaped piece from the valve body. The material-retrieving components include a rotating rod placed on the sealing plate. The outer wall of the rotating rod is provided with a docking plate that can easily reach into the docking groove to remove the arc-shaped piece. The outer wall of the rotating rod is fixedly installed with an arc-shaped piece for lifting the arc-shaped piece and removing it from the valve body, and a protrusion for monitoring the rotation amplitude of the rotating rod. The protrusion on the rotating rod is provided with two limit blocks within the range of rotation of the rotating rod. The positioning assembly includes two baffles that move and fit together on the sealing plate and the cover plate. The top of the sealing plate and the cover plate are fixedly installed with two U-shaped frames for limiting the movement space of the baffles.

2. A marine straight-through shut-off valve according to claim 1, characterized in that: The top of each arc-shaped piece is provided with two docking slots that can be used with the material handling component, and each docking slot is provided with a hidden notch.

3. A marine straight-through shut-off valve according to claim 1, characterized in that: The connecting assembly includes a connecting plate for connecting the sector block and the arc plate, and each connecting plate is provided with two locking screws for connecting the sector block or the arc plate.

4. A marine straight-through shut-off valve according to claim 1, characterized in that: The top of the reinforcing strip is fixedly equipped with an anti-tilting block to prevent the rotating plate from tilting excessively and becoming difficult to reset.

5. A marine straight-through shut-off valve according to claim 1, characterized in that: The kit block is provided with a fan-shaped notch that makes it easy to disassemble and remove the arc-shaped piece, and the positioning component is located in the fan-shaped notch.

6. A marine straight-through shut-off valve according to claim 1, characterized in that: A sleeve is installed at the top of the assembly block, and a valve stem for forming a valve is installed in the sleeve.

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