Ball valve with multiple seal packing gland

Abstract

The utility model discloses a kind of stuffing box's ball valve with multiple sealing structure, relate to ball valve technical field.The utility model includes first half spherical shell, second half spherical shell, valve core, valve rod and installation cover, valve core is movably connected in first half spherical shell and second half spherical shell, sealing filler strip is movably connected in the gap between first half spherical shell and second half spherical shell, the first half spherical shell and the second half spherical shell in the valve core top are all provided with fixed mouth, the upper portion in the fixed mouth on second half spherical shell is fixed with movable sleeve, the lower portion in the fixed mouth on first half spherical shell and second half spherical shell is movably connected with sealing filler ring, both ends of sealing filler strip are fixed in the circumferential side of sealing filler ring, valve rod is sleeved in movable sleeve, and installation cover is fixed in the top of movable sleeve.The utility model is by being provided with first half spherical shell, second half spherical shell, valve core, valve rod and installation cover, solve the problem that sealing effect is not high enough in ball valve work, and after ball valve failure, disassembly and repair are not convenient enough.

Description

Technical Field

[0001] This utility model belongs to the field of ball valve technology, and specifically relates to a ball valve with a stuffing box having multiple sealing structures. Background Technology

[0002] A ball valve is a common industrial valve, named for its core component, a ball with a through hole. It controls the flow of fluid or regulates flow by rotating the ball. It features simple structure, good sealing, and easy operation, and is widely used in petroleum, chemical, power, and water treatment industries. While ball valves require a sealing structure during operation, they still have the following drawbacks in practical use: During the sealing process, a sealing ring is usually used only inside the ball shell, and the internal packing structure prevents leakage during operation. However, the ball valve and valve stem are still directly connected, which can easily cause leakage at this location, resulting in insufficient sealing.

[0003] During installation, ball valves are typically installed using two mounting structures. When a fault occurs in the internal structure of the ball valve during operation, it is necessary to disassemble the ball valve for repair. However, the internal structures of the ball valve are tightly connected, making disassembly inconvenient. Utility Model Content

[0004] To address the aforementioned technical deficiencies, the present invention aims to provide a ball valve with a stuffing box featuring a multi-layered sealing structure. By establishing connections between the first hemispherical shell, the second hemispherical shell, the valve core, the valve stem, and the mounting cover, the invention solves the problems of insufficient sealing performance during ball valve operation and inconvenient disassembly and maintenance after a malfunction.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a ball valve with a multi-sealable stuffing box, comprising a first hemispherical shell, a second hemispherical shell, a valve core, a valve stem, and a mounting cover. Both the first and second hemispherical shells have openings on their adjacent sides, and these openings are fitted together. The valve core is movably connected within both the first and second hemispherical shells. A sealing packing strip is movably connected at the gap between the first and second hemispherical shells. A fixing opening is provided in both the first and second hemispherical shells directly above the valve core. A movable sleeve is fixed to the upper part of the fixed port on the second hemisphere, and the movable sleeve is movably connected to the fixed port on the first hemisphere. A sealing packing ring is movably connected to the lower part of the fixed ports on the first and second hemispheres. Both ends of the sealing packing strip are fixed to the periphery of the sealing packing ring. A valve stem is sleeved inside the movable sleeve, and an installation cover is fixed to the top of the movable sleeve. During operation, the first and second hemispheres enclose the valve core. The valve core rotates during operation, changing the opening and closing state of the ball valve. The valve stem transmits the torque of the handle on the installation cover to the valve core, and the installation cover closes the top of the movable sleeve.

[0006] Furthermore, mounting rings are fixed at the edges of the first and second hemispherical shells that are close to each other, and the two mounting rings are fitted together and fixed. Conveying pipes are fixedly connected to the edges of the first and second hemispherical shells that are far from each other. The first and second hemispherical shells are installed together by the mounting rings, and the conveying pipes convey the material.

[0007] The valve core has an inlet on its upper surface and a through-hole horizontally inside. The center line of the through-hole is on the straight line of the center axis of the two delivery pipes. The valve core is movably connected to the locking block through the inlet. The through-hole on the valve core is used to control the on / off of delivery between the two delivery pipes.

[0008] Several sealing rings are embedded and fixed on the inner wall of the movable sleeve, and the sealing rings abut against the circumference of the valve stem. The sealing rings on the movable sleeve cooperate to seal the valve stem.

[0009] The valve stem has a slot at its top and a block fixed at the center of its bottom. The block is inserted into the slot on the valve core, and the slot on the valve stem is movably connected to the block.

[0010] A rotating disk is movably connected inside the mounting cover. A locking block is fixed at the center of the bottom end of the rotating disk. The locking block is inserted into the slot at the top of the valve stem. A handle is fixed at the center of the top end of the rotating disk, and the handle passes through the mounting cover, so that when the handle is turned during operation, the valve stem is rotated.

[0011] The beneficial effects of this utility model are as follows: by setting a first hemispherical shell, a second hemispherical shell, and a valve core, the problem of insufficient sealing effect during ball valve operation is solved. When installing the two hemispherical shells, the sealing packing strip and the sealing packing ring are first set at the edge of the opening end inside the first hemispherical shell, and the sealing packing ring is movably connected to the fixed port on the first hemispherical shell. Then, the valve core is placed into the first hemispherical shell, and then the opening end of the second hemispherical shell is closed onto the first hemispherical shell. After installation by the mounting ring, the valve core is sealed with the fixed port on the first and second hemispherical shells, preventing leakage during ball valve operation and increasing the sealing effect during ball valve operation.

[0012] By setting up a first hemispherical shell, a second hemispherical shell, a valve core, a valve stem, and a mounting cover, the problem of inconvenient disassembly and maintenance after ball valve failure is solved. When installing the valve stem, first insert the valve stem into the movable sleeve until the insert at the bottom of the valve stem is inserted into the insert on the valve core inside the first and second hemispherical shells. Then place the mounting cover on the top of the movable sleeve, insert the locking block at the bottom of the rotating plate into the locking hole at the top of the valve stem, insert the installation bolt into the mounting cover, and screw it into the top of the movable sleeve. After tightening, the installation is complete. Turning the handle will drive the rotating plate, valve stem, and valve core to rotate, changing the on / off state of the ball valve. When disassembling the ball valve, simply unscrew the mounting bolt on the mounting cover and loosen the bolt and nut on the mounting ring. This will separate the mounting cover from the movable sleeve, completing the complete disassembly of the ball valve and making disassembly and maintenance after ball valve failure much more convenient. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional structural view of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the first hemispherical shell.

[0016] Figure 3 This is a three-dimensional structural diagram of the second hemispherical shell.

[0017] Figure 4 This is a three-dimensional structural diagram of the valve core.

[0018] Figure 5 This is a three-dimensional structural diagram of the valve stem.

[0019] Figure 6 This is a three-dimensional view of the structure after the cover is cut open.

[0020] Figure 7 This is a three-dimensional view of a ball valve assembly structure with a stuffing box featuring multiple sealing structures.

[0021] Reference numerals: 1. First hemispherical shell; 101. Fixed port; 102. Mounting ring; 103. Delivery pipe; 104. Sealing packing strip; 105. Sealing packing ring; 2. Second hemispherical shell; 201. Movable sleeve; 202. Sealing ring; 3. Valve core; 301. Insert; 302. Through port; 4. Valve stem; 401. Insert block; 402. Bayonet; 5. Mounting cover; 501. Handle; 502. Rotating disc; 503. Locking block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation Example 1

[0024] Please see Figure 1-4This utility model relates to a ball valve with a multi-seal packing gland, comprising a first hemispherical shell 1, a second hemispherical shell 2, a valve core 3, a valve stem 4, and a mounting cover 5. The sides of the first hemispherical shell 1 and the second hemispherical shell 2 that are close to each other are open, and these sides are fitted together. The valve core 3 is movably connected within the first and second hemispherical shells 1 and 2. The valve core 3 is movably connected within both the first and second hemispherical shells 1 and 2. During rotation, the valve core 3 controls the flow between the two delivery pipes 103. A sealing packing strip 104 is movably connected between the first and second hemispherical shells 1 and 2. During operation, the sealing packing strip 104 seals the gap between the two first hemispherical shells 1. A fixing port 101 is provided in both the first and second hemispherical shells 1 and 2 directly above the valve core 3. The fixing port 101 on the second hemispherical shell 2... A movable sleeve 201 is fixedly attached to the first hemispherical shell 1 and is movably connected to the fixed port 101 on the first hemispherical shell 1. The movable sleeve 201 fits the valve stem 4 inside. The lower part of the fixed port 101 on the first hemispherical shell 1 and the second hemispherical shell 2 is movably connected to a sealing packing ring 105. The sealing packing ring 105 seals the gap between the fixed port 101 on the first hemispherical shell 1 and the second hemispherical shell 2 and the valve core 3. Both ends of the sealing packing strip 104 are fixed to the periphery of the sealing packing ring 105 to ensure that the gap between the first hemispherical shell 1 and the second hemispherical shell 2 is fully sealed. The valve stem 4 is fitted inside the movable sleeve 201. When the valve stem 4 rotates, it drives the valve core 3 to rotate. The top of the movable sleeve 201 is fixed with a mounting cover 5. The mounting cover 5 seals the top of the movable sleeve 201. After the mounting bolt is inserted into the mounting cover 5, it is screwed into the movable sleeve 201 to install the mounting cover 5 on the movable sleeve 201.

[0025] Specifically, mounting rings 102 are fixed at the edges of the first hemisphere 1 and the second hemisphere 2 that are close to each other, and the two mounting rings 102 are fixed together. Conveying pipes 103 are fixedly connected to the edges of the first hemisphere 1 and the second hemisphere 2 that are far from each other. After the first hemisphere 1 and the second hemisphere 2 are fitted together, they are fitted together by the mounting rings 102, and the mounting bolts are inserted into the two mounting chambers and protrude. Under the action of the nut, the gap between the first hemisphere 1 and the second hemisphere 2 is sealed.

[0026] Furthermore, a socket 301 is provided on the upper surface of the valve core 3, and a through port 302 is provided horizontally inside the valve core 3. The center line of the through port 302 is on the straight line where the central axes of the two conveying pipes 103 are located. After the through port 302 in the valve core 3 moves to connect with the two conveying pipes 103, the valve is in an open position. After the valve core 3 moves to the point where the center line of the through port 302 is perpendicular to the central axes of the two conveying pipes 103, the valve is in a closed position.

[0027] The operation process of this embodiment is as follows: When installing two hemispherical shells, firstly, the sealing packing strip 104 and the sealing packing ring 105 are placed at the edge of the opening end inside the first hemispherical shell 1, and the sealing packing ring 105 is movably connected to the fixing port 101 on the first hemispherical shell 1. Then, the valve core 3 is placed inside the first hemispherical shell 1, and then the opening end of the second hemispherical shell 2 is closed onto the first hemispherical shell 1. After installation by the mounting ring 102, the valve core 3 is sealed with the fixing port 101 on the first hemispherical shell 1 and the second hemispherical shell 2, preventing leakage of the ball valve during operation. Specific Implementation Example 2

[0029] Please see Figure 1-7 Based on the first specific embodiment, a plurality of sealing rings 202 are embedded and fixed on the inner wall of the movable sleeve 201, and the sealing rings 202 abut against the periphery of the valve stem 4, and the sealing rings 202 in the movable sleeve 201 cooperate to seal the periphery of the valve stem 4.

[0030] Specifically, the valve stem 4 has a slot 402 at its top end and a plug 401 fixed at the center of its bottom end. The plug 401 is inserted into the slot 301 on the valve core 3. The slot 402 on the valve stem 4 is movably connected to the locking block 503. The plug 401 at the bottom end of the valve stem 4 is inserted into the slot 301 on the valve core 3, so that there is a transmission connection between the valve stem 4 and the valve core 3.

[0031] Furthermore, a rotating disk 502 is movably connected inside the mounting cover 5. A locking block 503 is fixed at the center of the bottom end of the rotating disk 502. The locking block 503 is inserted into the locking slot 402 at the top end of the valve stem 4. A handle 501 is fixed at the center of the top end of the rotating disk 502, and the handle 501 passes through the mounting cover 5. The rotating disk 502 on the mounting cover 5 fixes the locking block 503 on it and restricts the handle 501 and the mounting cover 5 together. Rotating the handle 501 will drive the rotating disk 502 to rotate. As the rotating disk 502 rotates, it drives the locking block 503 and the valve stem 4 to rotate.

[0032] The operation process of this embodiment is as follows: During operation, when installing the valve stem 4, first insert the valve stem 4 into the movable sleeve 201 until the insertion block 401 at the bottom of the valve stem 4 is inserted into the insertion port 301 on the valve core 3 inside the first hemispherical shell 1 and the second hemispherical shell 2. Then place the mounting cover 5 on the top of the movable sleeve 201, insert the locking block 503 at the bottom of the rotating disk 502 into the locking port 402 at the top of the valve stem 4, insert the installation bolt into the mounting cover 5, screw it into the top of the movable sleeve 201, and tighten it to complete the installation. Turning the handle 501 will drive the rotating disk 502, valve stem 4 and valve core 3 to rotate, changing the opening and closing state of the ball valve. When disassembling the ball valve, directly unscrew the mounting bolt on the mounting cover 5, and loosen the bolt and nut on the mounting ring 102 by rotating them. Then the mounting cover 5 and the movable sleeve 201 can be separated to complete the complete disassembly of the ball valve.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A ball valve with a stuffing box having a multiple seal structure, comprising a first half-sphere shell (1), a second half-sphere shell (2), a valve core (3), a valve stem (4) and a mounting cover (5), characterized in that: The first hemispherical shell (1) and the second hemispherical shell (2) are both open on their adjacent sides, and the adjacent sides of the first hemispherical shell (1) and the second hemispherical shell (2) are fitted together. A valve core (3) is movably connected inside the first hemispherical shell (1) and the second hemispherical shell (2). A sealing packing strip (104) is movably connected in the gap between the first hemispherical shell (1) and the second hemispherical shell (2). A fixing port (101) is opened in both the first hemispherical shell (1) and the second hemispherical shell (2) directly above the valve core (3). A movable sleeve (201) is fixed in the upper part of the fixed port (101) on the shell (2), and the movable sleeve (201) is movably connected in the fixed port (101) on the first hemispherical shell (1). The lower parts of the fixed ports (101) on the first hemispherical shell (1) and the second hemispherical shell (2) are movably connected to a sealing packing ring (105). Both ends of the sealing packing strip (104) are fixed to the periphery of the sealing packing ring (105). A valve stem (4) is sleeved in the movable sleeve (201), and an installation cover (5) is fixed at the top of the movable sleeve (201).

2. A ball valve having a stuffing box with multiple seals according to claim 1, characterized in that: Mounting rings (102) are fixed at the edges of the first hemispherical shell (1) and the second hemispherical shell (2) that are close to each other, and the two mounting rings (102) are fixedly attached to each other. Conveying pipes (103) are fixedly connected to the edges of the first hemispherical shell (1) and the second hemispherical shell (2) that are far apart from each other.

3. A ball valve having a stuffing box with multiple seals according to claim 1, wherein: The valve core (3) has an inlet (301) on its upper surface and a through-hole (302) horizontally inside the valve core (3), with the center line inside the through-hole (302) on the straight line of the center axis of the two delivery pipes (103).

4. The ball valve having a packing box with multiple seal structure according to claim 1, characterized in that: The inner wall of the movable sleeve (201) is inlaid with several sealing rings (202), and the sealing rings (202) abut against the periphery of the valve stem (4).

5. A ball valve having a stuffing box with multiple seals according to claim 3, wherein: The valve stem (4) has a slot (402) at the top and a plug (401) fixed at the center of the bottom end of the valve stem (4). The plug (401) is inserted into the slot (301) on the valve core (3).

6. A ball valve with a stuffing box having a multiple sealing structure according to claim 5, characterized in that: A rotating disk (502) is movably connected inside the mounting cover (5). A locking block (503) is fixed at the center of the bottom end of the rotating disk (502). The locking block (503) is inserted into the slot (402) at the top end of the valve stem (4). A handle (501) is fixed at the center of the top end of the rotating disk (502), and the handle (501) passes through the mounting cover (5).

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