Ball valve facilitating filler replacement

Abstract

The utility model provides a ball valve convenient to replace filler, which comprises a valve body, a valve rod is rotatably connected in the valve body, and a sealing component is arranged outside the valve rod; the sealing assembly comprises a threaded connecting part, a sealing groove, a sealing ring, a gland, a rotating ring, a threaded connecting ring, a pressing disc and a connecting rod. And the threaded connecting part is fixedly connected to the top of the valve body. When the packing is replaced, the threaded connecting ring is rotated anticlockwise, the pressing disc and the rotating ring move upwards, the pressing cover can be taken out so that the packing in the valve body can be replaced, and after replacement is completed, the threaded connecting ring is in butt joint with the threaded connecting part, and the threaded connecting ring is rotated clockwise, so that the packing can be sealed; compared with the prior art, the sealing assembly has the advantages that the packing can be replaced in a threaded connection mode, the nut does not need to be disassembled additionally when the packing is replaced, the whole replacing process is easy to operate, and the packing replacing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a ball valve, concretely ball valve convenient to replace packing belongs to ball valve technical field. BACKGROUND

[0002] Ball valve is a kind of valve that controls fluid on-off by rotating ball, and its core working principle is to realize opening and closing action by rotating 90 degrees around the axis of ball.The opening and closing member of ball valve is ball with circular channel, which is driven to rotate around the axis by valve stem.When ball rotates to align with the channel, fluid passage is opened;After rotating 90 degrees out of position, the passage is closed.Ball valve is widely used in petroleum, chemical industry, electric power, environmental protection and other fields, to control the on-off and flow direction switching of water, steam, gas and other media.Its compact structure and reliable sealing make it a commonly used valve type in industrial pipelines.

[0003] During the opening and closing process of ball valve, the valve stem moves up and down frequently, which generates friction with packing.After long-term use, the packing is gradually worn out, resulting in increased sealing gap between the packing and the valve stem, which in turn causes medium leakage.Therefore, the packing needs to be replaced regularly.

[0004] It is known that the Chinese authorized utility model (publication number: CN215172424U) discloses a ball valve convenient to replace packing, which is provided with a clamping structure and a control handle, and when the packing needs to be replaced, the handle can be easily disassembled, and the stop structure is matched, so that the packing can be replaced by only tightening two nuts, which reduces the operation difficulty of the operator and shortens the time required for replacing the packing;

[0005] It greatly facilitates the replacement of packing, and significantly simplifies the entire replacement process compared with the traditional design.However, during the actual packing replacement operation, the operator inevitably needs to use a specific tool to disassemble the two nuts, and the entire disassembly process is relatively cumbersome, which not only reduces the efficiency of replacing the packing, but also increases the work burden of the operator;

[0006] Therefore, a ball valve convenient to replace packing is proposed. UTILITY MODEL CONTENTS

[0007] Therefore, the utility model provides a ball valve convenient to replace packing to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial choice.

[0008] The technical scheme of the utility model embodiment is implemented as follows: a ball valve convenient to replace packing, comprising a valve body, a valve stem rotatably connected inside the valve body, and a sealing assembly provided outside the valve stem.

[0009] The sealing assembly comprises a threaded connection part, a sealing groove, a sealing ring, a gland, a rotating ring, a threaded connection ring, a pressure plate and a connecting rod.

[0010] The threaded connection part is fixedly connected to the top of the valve body, the sealing groove is arranged on the upper surface of the threaded connection part, the sealing ring is arranged in the sealing groove, the rotating ring is rotatably connected to the lower surface of the pressure plate, the two ends of the connecting rod are symmetrically fixedly connected to the opposite surfaces of the threaded connection ring and the pressure plate, the upper surface of the gland is attached to the lower surface of the rotating ring, and the gland, the rotating ring, the threaded connection ring and the pressure plate are all sleeved on the outer side of the valve rod.

[0011] Further preferably, the inner side wall of the gland is attached to the outer side wall of the valve rod, and the inner side wall of the valve body is provided with a packing body.

[0012] Further preferably, the packing body is arranged on the outer side wall of the valve rod, and the lower surface of the gland is attached to the upper surface of the packing body.

[0013] Further preferably, the gland is attached to the sealing ring, and the outer side wall of the gland is attached to the inner side wall of the valve body.

[0014] Further preferably, the inner side wall of the threaded connection ring is threadedly connected to the outer side wall of the threaded connection part, and the threaded connection part is in an integrated structure with the valve body.

[0015] Further preferably, the inner side wall of the valve body is provided with a ball core and two valve seats, the two valve seats are symmetrically fixedly connected to the inner side wall of the valve body, and the outer side wall of the ball core is attached to the inner side wall of the two valve seats.

[0016] Further preferably, the ball core is rotatably connected to the inner side wall of the valve body, and the bottom end of the valve rod is arranged on the top of the outer side wall of the ball core.

[0017] Further preferably, the outer side wall of the valve body is symmetrically fixedly connected with two connecting flanges, and the top end of the valve rod is fixedly connected with a connecting head.

[0018] The embodiment of the utility model has the following advantages due to the adoption of the above technical scheme.

[0019] When the packing is replaced, the threaded connection ring is counterclockwise rotated, the pressure plate and the rotating ring are moved upward, the gland can be taken out, the packing in the valve body is replaced, after the replacement is completed, the gland is inserted into the inner side of the valve body, then the threaded connection ring is butted with the threaded connection part, the threaded connection ring is clockwise rotated, and the sealing of the packing can be realized.

[0020] The above summary is intended to illustrate only and is not intended to be limiting in any way. Further aspects, embodiments and features of the present application will be apparent from a consideration of the drawings and detailed description below. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 is a structural view of the present application;

[0023] Figure 2 is a sectional view of the present application;

[0024] Figure 3 is an exploded view of the structure of the present application;

[0025] Figure 4 is a structure diagram of the threaded connection ring of the present application.

[0026] Reference signs: 101, sealing assembly; 11, valve body; 12, threaded connection part; 13, sealing groove; 14, sealing ring; 15, gland; 16, rotating ring; 17, threaded connection ring; 18, pressure plate; 19, connecting rod; 20, valve stem; 21, filler main body; 31, ball core; 32, valve seat; 33, connecting flange; 34, connecting head. DETAILED DESCRIPTION

[0027] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0028] The embodiments of the present application will be described in detail below with reference to the drawings.

[0029] As Figures 1-4 shown, the embodiment of the present application provides a ball valve convenient for replacing filler, which comprises a valve body 11, a valve stem 20 is rotatably connected inside the valve body 11, a sealing assembly 101 is arranged outside the valve stem 20, and the sealing assembly 101 can realize sealing of a filler main body 21;

[0030] The sealing assembly 101 comprises a threaded connection part 12, a sealing groove 13, a sealing ring 14, a gland 15, a rotating ring 16, a threaded connection ring 17, a pressure plate 18 and a connecting rod 19;

[0031] The threaded connection part 12 is fixedly connected to the top of the valve body 11, the sealing groove 13 is arranged on the upper surface of the threaded connection part 12, and the sealing ring 14 is located in the sealing groove 13. The sealing ring 14 can enhance the sealing effect of the sealing assembly 101.

[0032] The rotating ring 16 is rotationally connected to the lower surface of the pressure plate 18, the two ends of the connecting rod 19 are symmetrically fixedly connected to the opposite surfaces of the threaded connection ring 17 and the pressure plate 18, and the upper surface of the gland 15 is attached to the lower surface of the rotating ring 16. Thus, when the pressure plate 18 rotates, the rotating ring 16 can remain relatively stationary with the pressure plate 18.

[0033] The gland 15, the rotating ring 16, the threaded connection ring 17 and the pressure plate 18 are all sleeved on the outside of the valve rod 20. The gland 15 can seal the packing, and the position of the gland 15 can be limited by the cooperation of the rotating ring 16 and the pressure plate 18.

[0034] In an embodiment, the inner side wall of the gland 15 is attached to the outer side wall of the valve rod 20, the inside of the valve body 11 is provided with a packing body 21, the packing body 21 is located on the outer side wall of the valve rod 20, the lower surface of the gland 15 is attached to the upper surface of the packing body 21, the inner side wall of the threaded connection ring 17 is threadedly connected to the outer side wall of the threaded connection part 12, and the threaded connection part 12 is an integral structure with the valve body 11. By rotating the threaded connection ring 17 clockwise, the threaded connection ring 17 drives the pressure plate 18 to rotate through the connecting rod 19. Since the threaded connection ring 17 is screwed with the threaded connection part 12, the threaded connection ring 17 moves downward, the pressure plate 18 pushes the gland 15 downward through the rotating ring 16, and the gland 15 moves downward to seal the packing body 21.

[0035] In an embodiment, the gland 15 is attached to the sealing ring 14, and the outer side wall of the gland 15 is attached to the top of the inner side wall of the valve body 11. The sealing effect of the packing body 21 can be enhanced by the sealing ring 14.

[0036] In an embodiment, the inside of the valve body 11 is provided with a ball core 31 and two valve seats 32, the two valve seats 32 are symmetrically fixedly connected to the inner side wall of the valve body 11, the outer side wall of the ball core 31 is attached to the inner side wall of the two valve seats 32, the ball core 31 is rotationally connected to the inside of the valve body 11, and the bottom end of the valve rod 20 is installed on the top of the outer side wall of the ball core 31. Thus, when the valve rod 20 rotates, the valve rod 20 drives the ball core 31 to control the opening and closing of the valve.

[0037] In one embodiment, the outer side wall of the valve body 11 is symmetrically fixedly connected with two connecting flanges 33, and the top end of the valve rod 20 is fixedly connected with a connecting head 34, so that the valve body 11 is conveniently connected with a pipeline through the connecting flanges 33, and a handle is conveniently installed on the valve rod 20 through the connecting head 34.

[0038] The utility model discloses when working: through connecting flange 33 convenient valve body 11 is connected with the pipeline, when valve rod 20 rotates, valve rod 20 drives ball core 31, can control the opening and closing of valve, when needing to replace the packing, anticlockwise rotation screw thread connection ring 17, screw thread connection ring 17 moves upwards, and the upper movement of pressure plate 18 and swivel ring 16, the position of gland 15 is limited to be removed at this time, can take out gland 15, so that the packing in valve body 11 is replaced, after replacement, gland 15 is inserted to the inside of valve body 11, then screw thread connection ring 17 is butt jointed with screw thread connection portion 12, and screw thread connection ring 17 is rotated clockwise, and pressure plate 18 pushes down gland 15 through swivel ring 16, and then realize the sealing of packing;

[0039] Compared with the prior art, the sealing assembly 101 of the utility model can realize convenient replacement of the packing through the threaded connection mode, does not need to additionally disassemble the nut during the packing replacement operation, the whole replacement process is simple to operate, and the efficiency of replacing the packing is improved.

[0040] The above is only the specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, and anyone skilled in the art can easily think of various changes or replacements within the technical range disclosed by the utility model, and these should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be limited to the protection scope of the claims.

Claims

1. A ball valve with easy packing replacement, comprising a valve body (11), characterized in that: The valve body (11) is rotatably connected to a valve stem (20), and a sealing assembly (101) is provided on the outside of the valve stem (20); The sealing assembly (101) includes a threaded connection (12), a sealing groove (13), a sealing ring (14), a gland (15), a swivel (16), a threaded connection ring (17), a pressure plate (18), and a connecting rod (19); The threaded connection part (12) is fixedly connected to the top of the valve body (11). The sealing groove (13) is opened on the upper surface of the threaded connection part (12). The sealing ring (14) is located inside the sealing groove (13). The rotating ring (16) is rotatably connected to the lower surface of the pressure plate (18). The two ends of the connecting rod (19) are symmetrically fixedly connected to the opposite surfaces of the threaded connection ring (17) and the pressure plate (18). The upper surface of the pressure cap (15) is attached to the lower surface of the rotating ring (16). The pressure cap (15), rotating ring (16), threaded connection ring (17) and pressure plate (18) are all sleeved on the outside of the valve stem (20).

2. The ball valve for easy packing replacement according to claim 1, characterized in that: The inner wall of the gland (15) is attached to the outer wall of the valve stem (20), and the valve body (11) is provided with a packing body (21).

3. A ball valve for easy packing replacement according to claim 2, characterized in that: The packing body (21) is located on the outer side wall of the valve stem (20), and the lower surface of the gland (15) is attached to the upper surface of the packing body (21).

4. A ball valve for easy packing replacement according to claim 3, characterized in that: The gland (15) is fitted with the sealing ring (14), and the bottom of the outer side wall of the gland (15) is fitted with the top of the inner side wall of the valve body (11).

5. A ball valve for easy packing replacement according to claim 4, characterized in that: The inner wall of the threaded connecting ring (17) is threaded to the outer wall of the threaded connecting part (12), and the threaded connecting part (12) and the valve body (11) are an integral structure.

6. A ball valve for easy packing replacement according to claim 1, characterized in that: The valve body (11) is provided with a ball core (31) and two valve seats (32) inside. The two valve seats (32) are symmetrically fixed to the inner sidewall of the valve body (11), and the outer sidewall of the ball core (31) is attached to the inner sidewall of the two valve seats (32).

7. A ball valve for easy packing replacement according to claim 6, characterized in that: The ball core (31) is rotatably connected to the inside of the valve body (11), and the bottom end of the valve stem (20) is installed on the top of the outer side wall of the ball core (31).

8. A ball valve for easy packing replacement according to claim 7, characterized in that: Two connecting flanges (33) are symmetrically fixedly connected to the outer side wall of the valve body (11), and a connector (34) is fixedly connected to the top end of the valve stem (20).

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