Wear-resistant fixed ball valve

Abstract

The application relates to a wear-resistant fixed ball valve and relates to the technical field of valves, which comprises a valve body, a valve ball located in the valve body, a valve rod fixed on the valve ball and a valve cover fixed on the upper side of the valve body, the upper end of the valve rod penetrates through the upper side of the valve cover, an operation assembly for controlling the rotation of the valve rod is arranged on the valve cover, valve seats for elastically extruding the valve ball are slidably arranged on both sides of the valve ball in the valve body; a valve neck is coaxially fixed on the top surface of the valve cover in the vertical direction, a drip plate is detachably installed on the outer periphery of the valve neck; a supporting flange is fixed on the bottom surface of the valve body, a base plate is fixed on the bottom surface of the supporting flange in the horizontal direction, and a plurality of moving wheels are fixed on the bottom surface of the base plate; in the application, the moving wheels can be used for short-distance transportation by one person, the convenient moving function shortens the transportation time of the equipment in the installation site, the maintenance work position and the migration path, effectively accelerates the installation and debugging progress, and guarantees the overall construction efficiency.

Description

Technical Field

[0001] This application relates to the technical field of valves, and in particular to a wear-resistant fixed ball valve. Background Technology

[0002] Ball valves are a widely used type of valve in industrial fluid control systems. With their rapid opening and closing, low flow resistance coefficient, and excellent sealing performance, they are extensively used in petrochemical, municipal pipeline, and energy power industries. As an important branch of valve products, the core working principle of a ball valve is to drive the valve ball to rotate through the valve stem. This, combined with the on / off interaction between the through-hole on the valve ball and the valve body passage, allows for precise control of the fluid medium's transport status. As industrial applications increasingly demand ease of installation and structural stability for valve equipment, top-entry ball valves, due to their advantage of requiring no disassembly for maintenance, are gradually becoming one of the mainstream choices in medium- and high-pressure fluid control applications.

[0003] The top-entry ball valve disclosed in related technologies mainly consists of core components such as a valve body, a valve ball, a valve stem, and a valve cover. The valve ball is internally housed within the valve body cavity. One end of the valve stem is fixedly connected to the valve ball, while the other end passes through the valve cover and extends upwards. The valve cover is securely mounted on the upper side of the valve body, and its outer side is equipped with an operating component for controlling the rotation of the valve stem. The opening and closing of the ball valve can be adjusted manually or by a drive device. Simultaneously, elastic valve seats are symmetrically slidably arranged on both sides of the valve ball within the valve body cavity. These valve seats can continuously and elastically compress the valve ball, thereby ensuring the sealing performance of the ball valve during operation and preventing media leakage.

[0004] However, existing top-entry ball valves are generally made of integral metal casting, and due to structural strength and pressure resistance requirements, their overall weight is usually no less than 30 kilograms. In actual engineering installation, maintenance, or equipment relocation, the handling of these heavy-duty ball valves requires the coordinated efforts of multiple workers, which not only consumes significant labor costs but also significantly extends the equipment installation and commissioning cycle, affecting the overall construction progress, indicating room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide a wear-resistant fixed ball valve to solve the problems of the above-mentioned related technologies, such as the large overall weight of the top-entry ball valve, the need for multiple people to cooperate in handling, the high labor cost, and the long installation period, which affect the construction progress.

[0006] The wear-resistant fixed ball valve provided in this application adopts the following technical solution: A wear-resistant fixed ball valve includes a valve body, a valve ball located within the valve body, a valve stem fixed on the valve ball, and a valve cover fixed on the upper side of the valve body. The upper end of the valve stem penetrates the upper side of the valve cover. The valve cover is provided with an operating component for controlling the rotation of the valve stem. Valve seats located on both sides of the valve ball and elastically compressing the valve ball are slidably disposed within the valve body. A valve neck is coaxially fixed on the top surface of the valve cover in the vertical direction. A drip plate is detachably installed on the outer periphery of the valve neck. A supporting protrusion is fixed on the bottom surface of the valve body. A base plate is fixed on the bottom surface of the supporting protrusion in the horizontal direction. A plurality of movable wheels are fixed on the bottom surface of the base plate.

[0007] By adopting the above technical solutions, the mobile wheels allow a single person to complete short-distance transportation without the need for a large amount of additional manpower, significantly reducing labor costs and handling difficulties. At the same time, the convenient mobility function shortens the transportation time of equipment at the installation site, maintenance station, and relocation path, effectively accelerating the installation and commissioning progress and ensuring overall construction efficiency.

[0008] Optionally, a plurality of fixing screw holes are evenly provided on the top surface of the valve body around the valve stem, and fixing through holes that coincide with the fixing screw holes are evenly provided on the valve cover. A fixing bolt is provided on the top of the valve body that passes through the fixing through hole and is screwed into the fixing screw hole.

[0009] By adopting the above technical solution, a stable and detachable connection between the valve body and the valve cover is achieved by using fixing bolts that pass through the fixing holes of the valve cover and screw them into the fixing screw holes of the valve body. The fixing screw holes are evenly distributed around the valve stem to ensure balanced force distribution and improve assembly sealing and structural stability; the detachable design facilitates quick disassembly of components during subsequent maintenance and repair without the need to disassemble the entire valve body, thus adapting to the usage requirements of top-entry ball valves.

[0010] Optionally, two cover plates are provided horizontally above the valve cover. The sides of the two cover plates that are close to each other have arc-shaped notches that abut against the outer circumference of the valve neck. Vertically downward-facing limiting baffles are fixed to the outer circumferences of the two cover plates that are far apart from each other. Two symmetrical connecting rods are rotatably mounted on the outer circumference of the valve cover. A clearance notch is provided on the bottom surface of the limiting baffle. The inner wall of the clearance notch is rotatably connected to the end of the connecting rod furthest from the valve cover. A clearance through-hole is provided on the drip plate, with its inner wall slidingly engaging with the valve neck. The drip plate can slide back and forth vertically and be fixed. Two positioning blocks are fixed to the bottom surface of the drip plate. Positioning slots are provided on the top surfaces of both cover plates. The two cover plates can rotate upwards towards each other to abut against each other in a horizontal protective state. At this time, the positioning blocks can move downwards with the drip plate and insert into the positioning slots. The two limiting baffles and cover plates protect the fixing bolts.

[0011] By adopting the above technical solution, the cover plate can switch states by rotating the connecting rod. In horizontal protection mode, the two cover plates fit against the valve neck through the arc-shaped notch and abut against each other. Together with the limiting baffle, they form a protective space, providing all-round protection for the fixing bolts, effectively isolating them from dust, moisture, and corrosive media, preventing bolt corrosion and wear, and extending their service life. After the drip plate slides down, the positioning block inserts into the positioning slot, which can firmly lock the cover plate in the protective state and prevent it from rotating accidentally. Moreover, the structure is compact and does not affect the normal operation of the ball valve. At the same time, the cover plate can be flexibly rotated and retracted, without hindering valve cover disassembly and equipment maintenance. It takes into account both the protective effect of the fixing bolts and the convenience of equipment maintenance, improving the overall reliability of the ball valve.

[0012] Optionally, the positioning insert has a first inclined surface at the side edge away from the drip plate.

[0013] By adopting the above technical solution, the first inclined surface on the positioning block plays a guiding role, which can guide the positioning block to be smoothly inserted into the positioning slot, reduce the difficulty of alignment, and improve the convenience and efficiency of the cover plate locking operation.

[0014] Optionally, an elastic snap-fit ​​element is provided on the inner wall of the clearance through hole, and a plurality of positioning grooves for the elastic snap-fit ​​element to be snapped into are provided on the outer periphery of the valve neck along the vertical direction.

[0015] By adopting the above technical solution, the elastic snap-fit ​​component and the positioning groove can be matched to achieve rapid positioning and fixation of the drip plate at different heights on the valve neck, meeting the locking requirements of the cover plate in different states; the structure does not require additional fasteners, is easy to operate, and the elastic snap-fit ​​method can buffer vibration, prevent the drip plate from accidentally slipping, and improve the structural stability.

[0016] Optionally, the elastic snap-fit ​​component includes a compression spring and an arc-shaped protrusion. The inner wall of the clearance through hole is provided with a placement groove for the compression spring and the arc-shaped protrusion to be inserted. The compression spring squeezes one side of the arc-shaped protrusion, causing a part of the arc-shaped protrusion to protrude from the opening of the placement groove. The outer surface of the protruding part of the arc-shaped protrusion is an arc surface, and the arc length corresponding to this arc surface is a minor arc.

[0017] By adopting the above technical solution, the compression spring provides continuous elastic support for the arc-shaped protrusion, allowing it to be stably engaged in the positioning groove to lock the position of the drip plate; the inferior arc surface design of the arc-shaped protrusion can smoothly contact the valve neck when the drip plate slides up and down, reducing frictional resistance and realizing convenient adjustment of the drip plate height. Moreover, the structure is compact and requires no additional operating parts, improving the ease of use and structural stability.

[0018] Optionally, the two cover plates can rotate to a vertically downward supporting state after the positioning insert is dislodged from the positioning slot; four supporting through holes are respectively located on both sides of the valve body along the vertical direction on the base plate; a support rod is slidably mounted on the inner wall of the supporting through hole, and an elastic pressing member that drives the support rod to slide upward is fixedly mounted; an elastic telescopic rod that can elastically extend is rotatably mounted on the top surface of the support rod; a locking protrusion is fixedly mounted on the end face of the elastic telescopic rod away from the support rod, and a locking notch is opened on the locking protrusion; when the cover plate is in the vertically supporting state and the elastic telescopic rod is in the vertically upward state, the locking protrusion is located directly below the lower edge of the cover plate, and the lower edge of the cover plate can be inserted into the locking notch at this time, and the bottom surface of the support rod is flush with the lowest point of the moving wheel at this time.

[0019] By adopting the above technical solution, the cover plate can be switched to a vertical support state. The support rod, driven by the elastic compression component, moves down to be flush with the moving wheel and engages with the locking notch of the locking protrusion, forming a multi-directional support structure. This increases the contact area when the ball valve is temporarily placed, avoiding the risk of tipping over and improving placement stability. The elastic telescopic characteristics of the elastic telescopic rod can adapt to different engagement gaps, ensuring reliable locking. The integrated design of the support structure and moving components eliminates the need for additional auxiliary support components, balancing the stability of temporary ball valve placement with ease of transport, making operation simple and efficient.

[0020] Optionally, a second bevel is provided at the opening edge of the locking notch.

[0021] By adopting the above technical solution, the second inclined surface at the opening of the locking notch can play a guiding role, guiding the lower edge of the cover plate to slide quickly into the notch and engage, reducing the difficulty of alignment and improving the convenience and efficiency of locking the support state.

[0022] Optionally, the base plate is provided with limiting rods located on both sides of the valve body, and the two locking protrusions on the same side are fixedly connected to the two ends of the limiting rods on their relatively close sides; the limiting rods have a fixing notch on their top surface when the elastic telescopic rod is in a vertically upward state; when the two cover plates are in a horizontal protective state, the elastic telescopic rod can rotate to a horizontal limiting state in the direction toward the valve body, and the inner wall of the fixing notch abuts against the outer peripheral surface of the supporting protrusion at this time.

[0023] By adopting the above technical solution, when the elastic telescopic rod is rotated to the horizontal limit state, the fixing notch of the limit rod abuts against the outer circumference of the support convex plate. Combined with the limiting action of the limit rod fitting the bottom surface of the valve body and the top surface of the base plate, a multi-directional structural constraint is formed, which effectively enhances the assembly stability of the valve body and the base plate and prevents the ball valve from becoming loose due to medium pressure or vibration during operation. At the same time, this structure reuses the protection and support functions, eliminating the need for additional components, simplifying the overall structural design, and balancing stability and practicality.

[0024] Optionally, an elastic pad is fixed on the inner wall of the fixed notch, and the elastic pad can abut against the outer peripheral surface of the supporting protrusion when the elastic telescopic rod is in a horizontal limiting state.

[0025] By adopting the above technical solution, the elastic pad can fill the gap between the fixing notch and the supporting protrusion through its own elastic deformation, thereby improving the tightness of the contact, buffering vibration and impact, avoiding wear caused by hard contact, and enhancing the stability of the limit.

[0026] In summary, this application includes the following beneficial technical effects: In this application, the mobile wheels allow a single person to complete short-distance transportation without the need for a large amount of additional manpower, significantly reducing labor costs and handling difficulties. At the same time, the convenient mobility function shortens the transportation time of the equipment at the installation site, maintenance station, and relocation path, effectively accelerating the installation and commissioning progress and ensuring overall construction efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram illustrating the structure of the valve body and valve ball in an embodiment of this application; Figure 2 This is a schematic diagram illustrating the installation and assembly of the valve body and the base plate in an embodiment of this application; Figure 3 This is a schematic diagram illustrating the installation and assembly of the protective components in an embodiment of this application; Figure 4 This is a partial cross-sectional view of the installation and assembly of the cover plate and the drip plate in an embodiment of this application; Figure 5 yes Figure 4 An enlarged schematic diagram of part A in the middle; Figure 6 yes Figure 4 Enlarged schematic diagram of part B in the middle; Figure 7 This is a partial cross-sectional view of the support rod installation and assembly in an embodiment of this application; Figure 8 This is a partial cross-sectional view of an embodiment of the present application illustrating the installation and cooperation of the elastic telescopic rod and the locking protrusion; Figure 9 yes Figure 8 An enlarged schematic diagram of section C; Figure 10 This is a partial cross-sectional view of the installation and fit of the limiting rod in an embodiment of this application.

[0028] In the diagram, 1. Valve body; 11. Valve ball; 12. Valve stem; 13. Valve seat; 14. Supporting protrusion; 2. Valve cover; 21. Valve neck; 211. Positioning groove; 22. Drip plate; 221. Clearance hole; 222. Placement groove; 223. Positioning block; 2231. First inclined surface; 23. Fixing bolt; 24. Elastic snap-fit ​​component; 241. Compression spring; 242. Arc-shaped protrusion; 3. Operating component; 4. Moving component; 41. Base plate; 411. Supporting protrusion 412. Hole; 42. Support groove; 5. Moving wheel; 5. Protective component; 51. Cover plate; 511. Arc-shaped notch; 512. Positioning slot; 52. Limiting baffle; 521. Clearance notch; 53. Connecting rod; 6. Support rod; 7. Elastic extrusion piece; 71. Protruding plate; 72. First spring; 8. Elastic telescopic rod; 81. Locking protrusion; 811. Locking notch; 812. Second inclined surface; 9. Limiting rod; 91. Fixing notch; 92. Elastic pad. Detailed Implementation

[0029] The present application will be further described in detail below with reference to all the accompanying drawings. Example

[0030] Reference Figure 1 , Figure 2 and Figure 3 A wear-resistant fixed ball valve includes a valve body 1, a valve ball 11 located inside the valve body 1, a valve stem 12 fixed on the valve ball 11, and a valve cover 2 fixed on the upper side of the valve body 1. The upper end of the valve stem 12 penetrates the upper side of the valve cover 2. The valve cover 2 is provided with an operating component 3 for controlling the rotation of the valve stem 12. Valve seats 13 located on both sides of the valve ball 11 and elastically press against the valve ball 11 are slidably provided inside the valve body 1. A number of fixing screw holes are evenly opened on the top surface of the valve body 1 around the valve stem 12, and fixing through holes that coincide with the fixing screw holes are evenly opened on the valve cover 2. A fixing bolt 23 is provided above the valve body 1, which passes through the fixing through hole and is screwed into the fixing screw hole. A coaxial valve neck 21 is integrally formed on the top surface of the valve cover 2 along the vertical direction, and a drip plate 22 can be detachably installed on the outer periphery of the valve neck 21. A support protrusion 14 is fixedly provided on the bottom surface of the valve body 1. A moving component 4 is provided on the bottom surface of the support protrusion 14. The moving component 4 includes a base plate 41 whose top surface is fixedly connected to the bottom surface of the support protrusion 14 and four moving wheels 42 fixed on the bottom surface of the base plate 41. When the ball valve needs to move a short distance, it can move quickly using the moving wheels 42 of the base plate 41.

[0031] Reference Figure 3 , Figure 4 and Figure 5A protective component 5 is provided above the valve cover 2. The protective component 5 includes two cover plates 51 arranged horizontally above the valve cover 2. The sides of the two cover plates 51 that are close to each other are provided with arc-shaped notches 511 that can abut against the outer peripheral surface of the valve neck 21. The outer peripheral edges of the two cover plates 51 that are far apart from each other are integrally formed with vertically downward limiting baffles 52. Two symmetrical connecting rods 53 are rotatably installed on the outer periphery of the valve cover 2. The bottom surface of the limiting baffles 52 is provided with clearance notches 521. The inner wall of the clearance notch 521 is rotatably connected to the end of the connecting rod 53 away from the valve cover 2. The drip plate 22 is provided with a clearance through hole 221 whose inner wall slides with the valve neck 21. The drip plate 22 can slide back and forth in the vertical direction and be fixed. Two positioning blocks 223 are fixed on the bottom surface of the drip plate 22, and a first inclined surface 2231 is provided on the side edge of the positioning block 223 away from the drip plate 22. Positioning slots 512 are provided on the top surface of both cover plates 51. When the ball valve is installed and applied, the two cover plates 51 can rotate upwards to a horizontal protective state where they abut against each other. At this time, the positioning block 223 can move down with the drip plate 22 and be inserted into the positioning slot 512 to lock the rotation state of the two baffles. At this time, the two limit baffles 52 and the cover plates 51 together protect several fixing bolts 23, extending the service life of the fixing bolts 23.

[0032] Reference Figure 4 and Figure 6 The inner wall of the through hole 221 is provided with an elastic snap-fit ​​member 24, and the outer periphery of the valve neck 21 is provided with a number of positioning grooves 211 for the elastic snap-fit ​​member 24 to snap into along the vertical direction; when the drip plate 22 slides up and down to a certain position, the elastic snap-fit ​​member 24 can snap into the corresponding positioning groove 211. The elastic snap-fit ​​component 24 includes a compression spring 241 and an arc-shaped protrusion 242. A placement groove 222 is provided on the inner wall of the clearance through hole 221 for the compression spring 241 and the arc-shaped protrusion 242 to be inserted. The compression spring 241 squeezes one side of the arc-shaped protrusion 242, causing a part of the arc-shaped protrusion 242 to protrude from the opening of the placement groove 222. The outer surface of the protruding part of the arc-shaped protrusion 242 is an arc surface, and the arc length corresponding to this arc surface is a minor arc.

[0033] Reference Figure 7 , Figure 8 and Figure 9The base plate 41 has four support through holes 411 located on both sides of the valve body 1 along the vertical direction. A support rod 6 is slidably mounted on the inner wall of the support through hole 411, and an elastic extrusion member 7 is fixedly mounted to drive the support rod 6 to slide upward. An elastic telescopic rod 8 that can elastically extend is rotatably mounted on the top surface of the support rod 6. The elastic telescopic rod 8 is a conventional telescopic structure with an internal spring, which will not be described in detail here. A locking protrusion 81 is fixedly mounted on the end face of the elastic telescopic rod 8 away from the support rod 6. A locking notch 811 is opened on the locking protrusion 81, and a second inclined surface 812 is provided at the opening edge of the locking notch 811. After the positioning block 223 is dislodged from the positioning slot 512, the cover plate 51 can rotate to a vertically downward support state. When the ball valve is temporarily placed in a certain position (not yet connected to the pipeline), the cover plate 51 is adjusted to a vertical support state and the elastic telescopic rod 8 is adjusted to a vertically upward state. At this time, the locking protrusion 81 is located directly below the lower edge of the cover plate 51, and under the elastic compression of the elastic telescopic rod 8, the lower edge of the cover plate 51 can be inserted into the locking notch 811. The bottom surface of the support rod 6 is flush with the lowest point of the moving wheel 42, thereby improving the installation stability of the ball valve at this time.

[0034] Reference Figure 7 The elastic compression member 7 includes a protruding plate 71 fixed on the outer periphery of the support rod 6 and a first spring 72 located below the protruding plate 71 and in a compressed state. A support groove 412 for inserting the ring groove plate and the first spring 72 is provided at the upper edge of the support through hole 411. The two ends of the first spring 72 are fixedly connected to the bottom surface of the protruding plate 71 and the bottom wall of the support groove 412, respectively.

[0035] Reference Figure 8 and Figure 10 The base plate 41 is provided with limiting rods 9 on both sides of the valve body 1. The two locking protrusions 81 on the same side are fixedly connected to the two ends of the limiting rods 9 on their relatively close sides. When the elastic telescopic rod 8 is in the vertical upward state, the limiting rod 9 has a fixing notch 91 on its top surface. The inner wall of the fixing notch 91 is fixed with an elastic pad 92 made of rubber. When the two cover plates 51 are in a horizontal protective state, the elastic telescopic rod 8 can rotate to a horizontal limit state in the direction toward the valve body 1. At this time, the elastic pad 92 on the inner wall of the fixed notch 91 abuts against the outer peripheral surface of the supporting protrusion 14. The bottom and top surfaces of the limit rod 9 abut against the bottom surface of the valve body 1 and the top surface of the base plate 41, respectively, so as to improve the assembly stability of the valve body 1 and the base plate 41 in this state.

[0036] The implementation principle of this application embodiment is as follows: Temporary placement state: When the ball valve is not connected to the pipeline, the drip plate 22 moves upward to dislodge the positioning block 223, turning the two cover plates 51 in opposite directions to a vertical downward position and the elastic telescopic rod 8 to a vertical upward position. Under the combined action of the elastic pressing member 7 and the elastic telescopic rod 8, the support rod 6 moves downward to be flush with the moving wheel 42. The locking protrusion 81 engages with the lower edge of the cover plate 51 through the second inclined surface 812 and is fixed by the elastic tension of the elastic telescopic rod 8, thereby improving the stability of the temporary placement.

[0037] Horizontal protection state: After the ball valve is installed and connected to the pipeline, rotate the two cover plates 51 upwards to a horizontal position and abut against each other. Then, move the drip plate 22 downwards so that the positioning block 223 is inserted into the positioning slot 512, locking the horizontal protection state of the two cover plates 51, and working together with the limit baffle 52 to protect the fixing bolt 23. At the same time, the elastic telescopic rod 8 is rotated to a horizontal position, and the fixing notch 91 of the limit rod 9 abuts against the outer peripheral surface of the supporting protrusion 14 through the elastic pad 92. The limit rod 9 is used to fit the bottom surface of the valve body 1 and the top surface of the base plate 41 to enhance the assembly stability of the valve body 1 and the base plate 41.

[0038] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A wear-resistant fixed ball valve, comprising a valve body (1), a valve ball (11) located inside the valve body (1), a valve stem (12) fixed on the valve ball (11), and a valve cover (2) fixed on the upper side of the valve body (1), wherein the upper end of the valve stem (12) penetrates the upper side of the valve cover (2), and the valve cover (2) is provided with an operating component (3) for controlling the rotation of the valve stem (12), and valve seats (13) located on both sides of the valve ball (11) and elastically pressing the valve ball (11) are slidably disposed inside the valve body (1); A valve neck (21) is coaxially fixed on the top surface of the valve cover (2) along the vertical direction, and a drip plate (22) is detachably installed on the outer periphery of the valve neck (21); characterized in that, A support protrusion (14) is fixed on the bottom surface of the valve body (1), a base plate (41) is fixed on the bottom surface of the support protrusion (14) in the horizontal direction, and a plurality of moving wheels (42) are fixed on the bottom surface of the base plate (41).

2. The wear-resistant fixed ball valve according to claim 1, characterized in that, The valve body (1) has several fixed screw holes evenly distributed around the valve stem (12) on its top surface. The valve cover (2) has fixed through holes that coincide with the fixed screw holes evenly distributed on its top surface. The valve body (1) has a fixing bolt (23) that passes through the fixed through hole and is screwed into the fixed screw hole.

3. The wear-resistant fixed ball valve according to claim 2, characterized in that, Two cover plates (51) are provided horizontally above the valve cover (2). The two cover plates (51) have arc-shaped notches (511) on their sides that are close to each other, which can abut against the outer circumferential surface of the valve neck (21). Vertically downward limiting baffles (52) are fixed on the outer periphery of the two cover plates (51) that are far apart from each other. Two symmetrical connecting rods (53) are rotatably installed on the outer periphery of the valve cover (2). A clearance notch (521) is provided on the bottom surface of the limiting baffle (52). The inner wall of the clearance notch (521) is rotatably connected to the end of the connecting rod (53) away from the valve cover (2). The drip plate (22) has a clearance through hole (221) that slides with the valve neck (21) on its inner wall. The drip plate (22) can slide back and forth in the vertical direction and be fixed. Two positioning blocks (223) are fixed on the bottom surface of the drip plate (22). Positioning slots (512) are opened on the top surface of the two cover plates (51). The two cover plates (51) can rotate upwards to a horizontal protective state where they abut against each other. At this time, the positioning blocks (223) can move down with the drip plate (22) and be inserted into the positioning slots (512). The two limiting baffles (52) and the cover plates (51) protect the fixing bolts (23) at this time.

4. The wear-resistant fixed ball valve according to claim 3, characterized in that, The positioning insert (223) has a first inclined surface (2231) on its side edge away from the drip plate (22).

5. A wear-resistant fixed ball valve according to claim 3, characterized in that, The inner wall of the clearance through hole (221) is provided with an elastic snap-fit ​​member (24), and the outer periphery of the valve neck (21) is provided with a plurality of positioning grooves (211) for the elastic snap-fit ​​member (24) to be snapped into.

6. A wear-resistant fixed ball valve according to claim 5, characterized in that, The elastic snap-fit ​​component (24) includes a compression spring (241) and an arc-shaped protrusion (242). The inner wall of the clearance through hole (221) is provided with a placement groove (222) for inserting the compression spring (241) and the arc-shaped protrusion (242). The compression spring (241) squeezes one side of the arc-shaped protrusion (242) so that a part of the arc-shaped protrusion (242) protrudes from the opening of the placement groove (222). The outer surface of the protruding part of the arc-shaped protrusion (242) is an arc surface, and the arc length corresponding to the arc surface is a minor arc.

7. A wear-resistant fixed ball valve according to claim 3, characterized in that, After the positioning insert (223) is dislodged from the positioning slot (512), the two cover plates (51) can rotate to a vertically downward support state with opposite sides; the base plate (41) has four support through holes (411) respectively located on both sides of the valve body (1) along the vertical direction; the inner wall of the support through hole (411) is provided with a support rod (6) and a flexible extrusion member (7) that drives the support rod (6) to slide upward is fixed; the top surface of the support rod (6) is rotatably installed with an elastic telescopic rod (8) that can elastically extend; A locking protrusion (81) is fixed on the end face of the elastic telescopic rod (8) away from the support rod (6), and a locking notch (811) is provided on the locking protrusion (81). When the cover plate (51) is in a vertical support state and the elastic telescopic rod (8) is in a vertical upward state, the locking protrusion (81) is located directly below the lower edge of the cover plate (51). At this time, the lower edge of the cover plate (51) can be inserted into the locking notch (811), and the bottom surface of the support rod (6) is flush with the lowest point of the moving wheel (42).

8. A wear-resistant fixed ball valve according to claim 7, characterized in that, A second inclined surface (812) is provided at the opening edge of the locking notch (811).

9. A wear-resistant fixed ball valve according to claim 7, characterized in that, The base plate (41) is provided with limiting rods (9) located on both sides of the valve body (1). The two locking protrusions (81) on the same side are fixedly connected to the two ends of the limiting rods (9) on their relatively close sides. The limiting rods (9) have a fixed notch (91) on their top surface when the elastic telescopic rod (8) is in a vertically upward state. When the two cover plates (51) are in a horizontal protective state, the elastic telescopic rod (8) can rotate to a horizontal limit state in the direction toward the valve body (1), and the inner wall of the fixed notch (91) abuts against the outer peripheral surface of the supporting protrusion (14) at this time.

10. A wear-resistant fixed ball valve according to claim 9, characterized in that, An elastic pad (92) is fixed on the inner wall of the fixed notch (91). The elastic pad (92) can abut against the outer peripheral surface of the supporting convex plate (14) when the elastic telescopic rod (8) is in a horizontal limiting state.

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