CN210978589U - Eccentric hemisphere valve for pipeline leakage detection - Google Patents

Abstract

The utility model discloses an eccentric hemispherical valve for pipeline leakage detection in the technical field of pipeline leakage detection eccentric hemispherical valve. , and the second composite shaft sleeve is rotatably connected with the upper valve stem, the upper end of the upper valve stem extends into the sector gear hole of the worm gear box and is connected with the sector gear key, the spherical cap is fixedly connected with the spherical body support, the The valve seat is installed on the step on the right side of the valve body, the pressure plate is installed on the valve seat, the pressure plate and the valve body are connected by thread, and the top of the valve cover is fixed by the second double-ended stud and the second nut A bracket is connected, and the top of the bracket is fixedly connected with the worm gear box through the double-ended stud 4 and the nut 4, and the worm gear box is fixedly connected through the flat key 2 and the upper valve stem. Because the pressure plate and the valve body are connected by thread, Simpler maintenance and replacement, easier disassembly and adjustment of seat seal preload.

Description

A pipeline leak detection eccentric hemispherical valve

technical field

The utility model relates to the technical field of pipeline leakage detection eccentric hemispherical valves, in particular to a pipeline leakage detection eccentric hemispherical valve.

Background technique

The eccentric hemispherical valve is a ball valve with one-third of the sphere as the sealing valve core. The diameter ball valve basically has no flow resistance, is easy to operate, opens and closes quickly, and is convenient for long-distance control. The pressure plate and valve body of the eccentric hemisphere valve are connected by conventional screws. Deformation, or due to various factors such as rust in the screw hole or entry of impurities, the valve seat of the eccentric hemispherical valve is inspected online, and it is troublesome to replace and maintain. For this reason, we propose a pipeline leak detection eccentric hemispherical valve.

Utility model content

The purpose of the utility model is to provide a pipeline leak detection eccentric hemispherical valve, which has a simple structure, rational design and convenient operation and operation, which can effectively solve the problem that the internal stress of the existing eccentric hemispherical valve will gradually bend and deform the screw after a period of use. Or due to various factors such as rust in the screw hole or the entry of impurities, the valve seat of the eccentric hemisphere valve is inspected online, and the replacement and maintenance are more troublesome.

In order to achieve the above purpose, the utility model provides the following technical solutions: an eccentric hemispherical valve for pipeline leak detection, comprising a valve body, a spherical body support, a spherical crown, a valve seat, an upper valve stem, a pressure plate, a bottom cover and a worm gear box, the spherical body The support and the spherical cap are arranged in the valve body, the upper end of the bottom cover passes through the bottom of the valve body and is supported at the center of the bottom of the spherical body support, the bottom cover is rotatably connected with the spherical body support, and a compound is arranged between the bottom cover and the spherical body support. Type 1 bushing, the lower end of the upper valve stem passes through the top of the valve body and is fixedly connected to the sphere support, and a second composite bushing is arranged between the upper valve rod and the valve body, and the second composite bushing It is rotatably connected with the upper valve rod, the upper end of the upper valve rod extends into the sector gear hole of the worm gear box and is connected with the sector gear key, the spherical cap is fixedly connected with the spherical body support, and the valve seat is installed on the right On the steps, the pressure plate is installed on the valve seat, the pressure plate and the valve body are connected by thread, the top of the valve cover is fixedly connected with a bracket through the second double-ended stud and the second nut, and the top of the bracket is The worm gear box is fixedly connected with the worm gear box through the double-ended stud 4 and the nut 4, and the worm gear box is fixedly connected with the upper valve stem through the flat key 2.

Preferably, multiple layers of packing are arranged between the upper valve stem and the inner hole of the valve body, and the multiple layers of the packing are stacked and arranged. And the nut three is fixedly connected with the valve body and the multi-layer packing is compressed by the packing pressing plate.

Preferably, the top of the valve body is equipped with a valve cover, and there are stop openings between the valve body and the valve cover and between the valve body and the bottom cover, and the two stop openings are respectively equipped with gaskets two and one A gasket, and the valve body and the valve cover are fixedly connected by a double-ended stud and a nut, and the valve body and the bottom cover are fixedly connected by a hexagon socket head screw.

Preferably, the upper valve stem and the sphere support are fixedly connected by two flat keys.

Preferably, a composite shaft sleeve 1 is assembled between the bottom cover and the sphere support, and the composite shaft sleeve 1 is a shaft sleeve sprayed inside the opening.

Preferably, an O-shaped seal ring 1 is provided between the valve body and the bottom cover, the spherical cap and the spherical body support are fixedly connected by a hexagon socket head screw, and an O-shaped seal is installed between the spherical cap and the spherical body support Ring 2, an O-shaped sealing ring 3 is assembled between the pressure plate and the valve body.

Compared with the prior art, the beneficial effects of the present utility model are:

1. The utility model has the advantages of simple structure, novel and reasonable design, and convenient operation. Because the gasket and O-ring seal are used between the bottom cover and the valve body to realize multi-channel sealing, the sealing is more reliable and not easy to leak;

2. Two flat keys are used to connect the upper valve stem and the ball support, the connection is reliable and the torque is lighter, so that the worm gear box can drive the upper valve stem and the ball support to rotate faster to achieve the purpose of quick opening and closing of the valve;

3. The pressure plate and the valve body are fixedly connected by hexagon socket head screws, which makes the connection between the pressure plate and the valve body more reliable. The valve sealing pressure can be adjusted faster by quickly adjusting the position of the pressure plate, and it is also convenient for online quick replacement, maintenance and cleaning. valve parts.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

In the picture: 1 Bottom cover, 2 Hexagon socket head cap screws, 1, 3 Gaskets, 4O type sealing ring 1, 5 Valve body, 6 Composite shaft sleeve 1, 7 Ball support, 8 spherical crown, 9O type sealing ring 2, 10 Hexagon socket head cap screws 2, 11 pressure plate, 12 valve seat, 13O type sealing ring 3, 14 flat key 1, 15 upper stem, 16 composite bushing 2, 17 packing, 18 gasket 2, 19 valve cover, 20 double head Stud one, 21 nut one, 22 packing pressure plate, 23 bracket, 24 double stud two, 25 nut two, 26 double stud three, 27 nut three, 28 double stud four, 29 nut four, 30 flat Key two, 31 worm gear box.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to FIG. 1, the present utility model provides a technical solution: an eccentric hemispherical valve for pipeline leak detection, comprising a valve body 5, a spherical body support 7, a spherical crown 8, a valve seat 12, an upper valve stem 15, a pressure plate 11, and a bottom cover 1 and the worm gear box 31, the spherical support 7 and the spherical cap 8 are arranged in the valve body 5, the upper end of the bottom cover 1 passes through the bottom of the valve body 5 and is supported at the bottom center of the spherical support 7, and the bottom cover 1 is rotatably connected with the spherical support 7 , the bottom cover 1 and the ball support 7 are provided with a composite shaft sleeve 6 , the lower end of the upper valve rod 15 passes through the top of the valve body 5 and is fixedly connected with the ball support 7 , and the upper valve rod 15 and the valve body 5 are provided with a The second composite shaft sleeve 16, and the second composite shaft sleeve 16 is rotatably connected with the upper valve rod 15, the upper end of the upper valve rod 15 extends into the sector gear hole of the worm gear box 31 and is connected with the sector gear key, and the spherical cap 8 is supported by the spherical body 7. Fixed connection, the valve seat 12 is installed on the step on the right side of the valve body 5, the pressure plate 11 is installed on the valve seat 12, the pressure plate 11 and the valve body 5 are connected by screw threads, and the top of the valve cover 19 is connected by a double-ended stud The second 24 and the second nut 25 are fixedly connected with the bracket 23, and the top of the bracket 23 is fixedly connected with the worm gear box 31 through the double-ended stud four 28 and the fourth nut 29, and the worm gear box 31 is fixedly connected with the upper valve stem 15 through the flat key two 30. .

Please refer to FIG. 1 , a multi-layer packing 17 is arranged between the upper valve stem 15 and the inner hole of the valve body 5, and the multilayer packing 17 is stacked and arranged. The top of the packing 17 is provided with a packing pressure plate 22, and the packing pressure plate 22 passes through the double-ended screw. The column three 26 and the nut three 27 are fixedly connected with the valve body 5 and the multi-layer packing 17 is compressed by the packing pressing plate 22;

Referring to FIG. 1 , a valve cover 19 is assembled on the top of the valve body 5 , and there are stop openings between the valve body 5 and the valve cover 19 and between the valve body 5 and the bottom cover 1 , and the two stop openings are respectively equipped with Gasket two 18 and gasket one 3, and the valve body 5 and the valve cover 19 are fixedly connected by a stud bolt one 20 and a nut one 21, and the valve body 5 and the bottom cover 1 are fixed by a hexagon socket head cap screw one 2 The connection increases the stability of the connection between the structures and the convenience of disassembly;

Please refer to Fig. 1, the upper valve stem 15 and the ball support 7 are fixedly connected by two flat keys - 14, which can complete the torque transmission between the upper valve stem 15 and the ball support 7, the connection is reliable, the torque is lighter, and the worm gear The box 31 can drive the upper valve stem 15 and the ball support 7 to rotate more quickly to achieve the purpose of quick opening and closing of the valve;

A composite shaft sleeve 1 6 is assembled between the bottom cover 1 and the sphere support 7, and the composite shaft sleeve 1 6 is a shaft sleeve sprayed in the opening;

The valve body 5 and the bottom cover 1 are provided with an O-type sealing ring 1 4, the spherical cap 8 and the spherical body support 7 are fixedly connected by a hexagon socket head screw 2 10, and an O-shaped sealing ring is installed between the spherical cap 8 and the spherical body support 7 29. An O-shaped sealing ring 313 is installed between the pressure plate 11 and the valve body 5, which makes the sealing more reliable and not easy to leak.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. The utility model provides a pipeline eccentric half ball valve that leaks hunting which characterized in that: comprises a valve body (5), a ball support (7), a ball crown (8), a valve seat (12), an upper valve rod (15), a pressure plate (11), a valve cover (19), a bottom cover (1) and a worm gear case (31), wherein the ball support (7) and the ball crown (8) are arranged in the valve body (5), the upper end of the bottom cover (1) penetrates through the bottom of the valve body (5) and is supported at the center of the bottom of the ball support (7), the bottom cover (1) is rotatably connected with the ball support (7), a first composite shaft sleeve (6) is arranged between the bottom cover (1) and the ball support (7), the lower end of the upper valve rod (15) penetrates through the top of the valve body (5) and is fixedly connected with the ball support (7), a second composite shaft sleeve (16) is arranged between the upper valve rod (15) and the valve body (5), and the second composite shaft sleeve (16) is rotatably connected with the upper valve rod, the upper end of the upper valve rod (15) extends into a sector gear hole of a worm gear box (31) and is connected with a sector gear key, a spherical crown (8) is fixedly connected with a spherical support (7), a valve seat (12) is installed on a step on the right side of the valve body (5), a pressing plate (11) is installed on the valve seat (12), the pressing plate (11) is connected with the valve body (5) through threads, the top of the valve cover (19) is fixedly connected with a support (23) through a double-end stud II (24) and a nut II (25), the top of the support (23) is fixedly connected with the worm gear box (31) through a double-end stud IV (28) and a nut IV (29), and the worm gear box (31) is fixedly connected with the upper valve rod (15) through a flat key II (30).

2. The eccentric hemisphere valve of claim 1, wherein: the packing structure is characterized in that multiple layers of packing (17) are arranged between the upper valve rod (15) and an inner hole of the valve body (5), the multiple layers of packing (17) are stacked and distributed, a packing pressing plate (22) is arranged at the top of the packing (17), the packing pressing plate (22) is fixedly connected with the valve body (5) through a stud III (26) and a nut III (27), and the multiple layers of packing (17) are pressed tightly through the packing pressing plate (22).

3. The eccentric hemisphere valve of claim 1, wherein: valve body (5) top is equipped with valve gap (19), just between valve body (5) and valve gap (19) and between valve body (5) and bottom (1) all seted up the tang, and two tang departments are equipped with gasket two (18) and gasket one (3) respectively, just through stud one (20) and nut one (21) fixed connection between valve body (5) and valve gap (19), through hexagon socket head cap screw one (2) fixed connection between valve body (5) and bottom (1).

4. The eccentric hemisphere valve of claim 1, wherein: the upper valve rod (15) and the ball support (7) are fixedly connected through two flat keys I (14).

5. The eccentric hemisphere valve of claim 1, wherein: a first composite shaft sleeve (6) is assembled between the bottom cover (1) and the ball support (7), and the first composite shaft sleeve (6) is a shaft sleeve sprayed in the opening.

6. The eccentric hemisphere valve of claim 1, wherein: be provided with O type sealing washer (4) between valve body (5) and bottom (1), ball crown (8) and spheroid support (7) are through allen key screw two (10) fixed connection, just be equipped with O type sealing washer two (9) between ball crown (8) and spheroid support (7), be equipped with O type sealing washer three (13) between clamp plate (11) and valve body (5).

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