TWM453065U - Protection device for valve - Google Patents

Description

Valve protection device

The present invention relates to a protective device for a valve, and more particularly to a protective device adapted to be mounted on a valve to improve the rust resistance of the valve.

In pipes that generally transport fluids, valves are widely used to control the circulation or shut down of the pipes. When the components of the valve are corroded by the fluid in the pipeline or the aging failure occurs, the transport fluid will leak out and cause loss, and the shutdown is required for valve maintenance.

The first to third figures show a conventional valve 10 including a valve body 12, a bonnet 14 and a top seat 16 integrally formed at the top end of the bonnet 14. The valve body 12 has an inlet port 17 and an outlet port 18 for individually providing a conduit (not shown). The valve body 12 has a shaft chamber 19 at the top. The lower end 22 of a valve stem 20 extends into the shaft chamber 19 and is connected to a stop plug 24. The upper end 26 of the valve stem 20 is coupled to a hand wheel 28 having a center at the center of the hand wheel 28 for passage of the upper end 26 of the valve stem 20. The shaft cylinder 29 is mounted on the upper end of the top seat 16 and is locked by a fixing member 30, so that when the operating hand wheel 28 rotates, the valve stem 20 and the stop plug 24 are closed or opened as the upper and lower movements are moved up and down. A fluid passage inside the valve body 12. The bonnet 14 is coupled to the upper end of the valve body 12, and a pressure block 32 is disposed on the top of the bonnet 14 and a gasket 34 is disposed inside the bonnet 14. The upper end of the gasket 34 is mounted with a bushing 36 when locked. After the bolt 38 pressurizes the pressure block 32, the gasket 34 will close the passage between the valve stem 20 and the bonnet 14, thereby preventing the delivery fluid from leaking out through the shaft chamber 19 of the valve body 12.

However, after the valve 10 is used for a period of time, the threads 39 of the hand wheel 28 and the valve stem 20 may be eroded by moisture particles in the air and moisture in the humid environment, resulting in malfunction. Especially for valves used in seaside factories, it is more susceptible to the erosion of sea breeze, resulting in a reduced service life of hand wheel 28 and valve stem 20.

In view of this, the creator has carefully studied, analyzed and designed, and has created this creation. Therefore, the main purpose of the present invention is to provide a protective device for a valve which is provided on the valve for improving the corrosion resistance of the valve and has the advantages of simple structure.

The protection device according to the present invention is used for mounting on a valve, the valve comprising a valve body, a valve stem and a hand wheel connected to the valve stem, the lower end of the valve stem is connected with a stop plug, the valve stem The upper end extends on the upper side of the hand wheel, and when the hand wheel is rotated, the stop plug can be moved up and down to close or open the internal passage of the valve body. The protection device comprises a housing and a sleeve. The housing includes a top wall and a side wall extending downward from the periphery of the top wall, and an open-faced chamber is defined between the top wall and the side wall, the width of the chamber being slightly larger in the radial direction than the valve The outer diameter of the hand wheel allows the housing to fit over the outside of the hand wheel. The sleeve extends upward from the top wall of the housing and has an accommodation space therein, the bottom of the accommodation space is in communication with the chamber of the housing and the accommodation space can accommodate the upper end of the valve stem.

In an embodiment, the upper end of the valve stem has an external thread, and the inner surface of the bottom end of the sleeve has an internal thread, and the internal thread of the sleeve can be screwed with the external thread of the valve stem.

In an embodiment, the center of the hand wheel has a shaft barrel through which the upper end of the valve stem passes, the upper end of the shaft barrel extends a threaded section, the threaded section protrudes from the hand wheel; the bottom end of the sleeve The inner surface has an internal thread and the internal thread of the sleeve can be threadedly positioned with the threaded section of the barrel.

Other objects, advantages and features of the present invention will be apparent from the following description of the preferred embodiments illustrated herein.

The preferred embodiment of the present invention will now be described by way of example only and not by way of limitation,

Referring to Figures 4 and 5, there is shown a protective device 40 constructed in accordance with the first embodiment of the present invention, which is intended to be coupled to a valve 10 for providing rust resistance. The valve 10 can be a valve that is typically used to control the flow or closure of a line, and can be of many different types. In the present embodiment, the valve 10 has a valve configuration as shown in the second figure, and includes a valve body 12, a bonnet 14 and a top seat 16. The valve body 12 has an inlet port 17 and an outlet port 18 for individually providing a pipe connection. The valve body 12 has a shaft chamber 19 at the top. The lower end 22 of the valve stem 20 extends into the shaft chamber 19 and is connected to a stop plug 24. The upper end 26 of the valve stem 20 has an external thread 39 and is connected to a hand wheel 28. The center of the hand wheel 28 has a valve stem 20 The upper end 26 passes through the barrel 29, and the barrel 29 is mounted on the upper end of the top seat 16 and is locked by a fixing member 30, so that when the operating hand wheel 28 is rotated, the valve stem 20 and the stop plug 24 move up and down. The fluid passage inside the valve body 12 is closed or opened. The bonnet 14 is coupled to the upper end of the valve body 12, and a pressure block 32 is disposed on the top of the bonnet 14 and a gasket 34 is disposed inside the bonnet 14. The upper end of the gasket 34 is mounted with a bushing 36 when locked. After the bolt 38 pressurizes the pressure block 32, the gasket 34 will close the passage between the valve stem 20 and the bonnet 14, thereby preventing the delivery fluid from leaking out through the shaft chamber 19 of the valve body 12.

In the present embodiment, the protection device 40 includes a cylindrical housing 42 and a sleeve 44. The housing 42 includes a top wall 46 and side walls 48 extending downwardly from the periphery of the top wall 46. Between the top wall 46 and the side wall 48, an opening 50 facing downward is defined. The width of the chamber 50 in the radial direction is slightly larger than the outer diameter of the hand wheel 28 of the valve 10, so that the housing 42 can be placed over The outer side of the hand wheel 28, in addition, the length of the chamber 50 in the axial direction (i.e., the height of the side wall 48) is greater than the distance between the bonnet 14 of the valve 10 and the hand wheel 28 in the axial direction and is smaller than the valve body 12 and the hand. The spacing of the wheels 28 in this axial direction (as shown in the fifth figure). The sleeve 44 extends upwardly from the top wall 46 of the housing 42 and has a predetermined length in the axial direction. The sleeve 44 includes a bottom end 52 and a top end 54 spaced along the axial direction, and an inner receiving space 56. The bottom of the receiving space 56 communicates with the chamber 50 of the housing 42 and the receiving space 56 can The upper end 26 of the valve stem 20 is received. In the present embodiment, the inner surface of the bottom end 52 of the sleeve 44 has an internal thread 58 that can be screwed with the external thread 39 of the valve stem 20 such that the sleeve 44 and the valve stem 20 The upper end 26 forms a threaded connection.

The protective device 40 constructed according to the present invention can be used to cover the hand wheel 28 of the valve 10 and the outer end 26 of the valve stem 20 (ie, the housing 42 of the protection device 40 can be placed outside the hand wheel 28 and the protection device The sleeve 44 of 40 can be sleeved outside the upper end 26 of the valve stem 20 such that the hand wheel 28, the valve stem 20 and even the top seat 16 of the valve 10 can be isolated from the external environment, thereby avoiding the hand wheel 28 and the valve stem. 20. The top seat 16, the bolt 38 and the pressure block 32 are corroded by the external environment, and the rust resistance of the valve 10 is improved. In particular, when the protective device 40 of the present invention is overlaid on the valve 10, the chamber 50 of the housing 42 accommodates the hand wheel 28 and the top seat 16, and the sleeve 44 accommodates the valve stem 20. The upper end 26 (as shown in the fifth figure) is such that the hand wheel 28 and the external thread 39 of the valve stem 20 are not adhered by dust particles in the air and are not eroded by moisture in a humid environment. Moreover, when the protective device 40 of the present invention is overlaid on the valve 10, the internal thread 58 of the sleeve 44 is screwed to the external thread 39 of the valve stem 20, so that the protection device 40 can be firmly coupled. On the valve 10 (if the sleeve 44 is not provided with an internal thread 58, the bottom of the sleeve 44 can be snapped to the center of the hand wheel 28 for positioning). Additionally, the guard 40 can also be easily removed from the valve 10 when the hand wheel 28 is to be operated to move the valve stem 20.

Referring to the sixth and seventh figures, there is shown a protection device 40 constructed in accordance with a second embodiment of the present invention. In the present embodiment, the upper end of the barrel 29 is extended by a threaded section 60, and the threaded section 60 projects. The center of the hand wheel 28; and the sleeve 44 is designed such that when the inventive protective device 40 is overlaid on the valve 10, the internal thread 58 of the bottom end 52 of the sleeve 44 can be associated with the barrel 29 The threaded section 60 forms a threaded position so that the protective device 40 is advantageously mounted to the valve 10 and can be removed from the valve 10 more easily.

In the above embodiment, the housing 42 of the protection device 40 is integral with the sleeve 44. However, in a possible embodiment, the housing 42 of the protection device 40 can be separated from the sleeve 44. Components. Furthermore, the housing 42 can be made of a transparent material to observe the relative position of the hand wheel 28 and the valve stem 20 and/or the locking state of the bolt 38 and the pressure block 32, or can be used in the protection device. The housing 42 of 40 is provided with a transparent area for viewing the state of the hand wheel 28, the valve stem 20 and the bolt 38 and the pressure block 32.

In the foregoing specification, the present invention has been described only in terms of specific embodiments, and various changes or modifications may be made in the design features of the present invention. Therefore, obvious substitutions and modifications to those skilled in the art will still be incorporated in the scope of the patent claimed herein.

10‧‧‧ valve
12‧‧‧ valve body

14‧‧‧ bonnet
16‧‧‧ top seat

17‧‧‧Inlet
18‧‧‧ Outflow

19‧‧‧Axis room
20‧‧‧ valve stem

22‧‧‧Bottom
24‧‧‧ Stop plug

26‧‧‧Upper
28‧‧‧Handwheel

29‧‧‧ shaft tube
30‧‧‧Fixed parts

32‧‧‧Clamps
34‧‧‧Gland

36‧‧‧ Bushing
38‧‧‧ bolt

39‧‧‧Thread
40‧‧‧protection device

42‧‧‧Shell
44‧‧‧ casing

46‧‧‧ top wall
48‧‧‧ side wall

50‧‧ ‧ room
52‧‧‧ bottom

54‧‧‧Top
56‧‧‧ accommodation space

58‧‧‧ internal thread
60‧‧ Thread section

The first figure is a perspective view of a conventional valve.

The second figure is a cross-sectional view of the valve of the first figure.

The third figure shows a cross-sectional view of the valve stem of the second figure moving downward.

The fourth figure is a partially cutaway perspective view of the protection device constructed in accordance with the first embodiment of the present creation

The fifth figure shows a cross-sectional view of the protection device of the fourth figure mounted on a valve.

Figure 6 is a partially cutaway perspective view of the protection device constructed in accordance with the second embodiment of the present invention

Figure 7 shows a cross-sectional view of the protection device of Figure 6 mounted on a valve.

10‧‧‧ valve

12‧‧‧ valve body

14‧‧‧ bonnet

16‧‧‧ top seat

17‧‧‧Inlet

18‧‧‧ Outflow

19‧‧‧Axis room

20‧‧‧ valve stem

22‧‧‧Bottom

24‧‧‧ Stop plug

26‧‧‧Upper

28‧‧‧Handwheel

29‧‧‧ shaft tube

30‧‧‧Fixed parts

32‧‧‧Clamps

34‧‧‧Gland

36‧‧‧ Bushing

38‧‧‧ bolt

39‧‧‧Thread

40‧‧‧protection device

42‧‧‧Shell

44‧‧‧ casing

46‧‧‧ top wall

48‧‧‧ side wall

50‧‧ ‧ room

52‧‧‧ bottom

54‧‧‧Top

56‧‧‧ accommodation space

58‧‧‧ internal thread

Claims (6)

A valve protection device for mounting on a valve, the valve comprising a valve body, a valve stem and a hand wheel connected to the valve stem, the upper end of the valve stem extending on the hand wheel On the upper side, when the hand wheel is rotated, the valve stem can move up and down, and the protection device comprises:
a casing comprising a top wall and a side wall extending downward from the periphery of the top wall, between the top wall and the side wall defining a cavity facing downward, the width of the chamber being slightly larger in the radial direction The outer diameter of the hand wheel is such that the housing can be sleeved on the outer side of the hand wheel; and a sleeve extending upward from the top wall of the housing and including an accommodation space located inside, the bottom of the accommodation space and The housing of the housing is in communication and the receiving space is for receiving the upper end of the valve stem. The protective device for a valve according to claim 1, wherein the inner surface of the bottom end of the sleeve has an internal thread, and the internal thread of the sleeve can be screwed with the valve stem. The protection device for a valve according to claim 1, wherein the center of the hand wheel has a shaft barrel through which the upper end of the valve rod passes, and the upper end of the shaft tube extends a thread segment, and the thread segment is convex. The hand wheel is provided; the inner surface of the bottom end of the sleeve has an internal thread, and the internal thread of the sleeve can be screwed with the threaded section of the barrel. The protective device for a valve according to claim 2, wherein the length of the chamber in the axial direction is smaller than the distance between the valve body of the valve and the hand wheel in the axial direction. A protective device for a valve according to claim 2, wherein the housing is made of a transparent material. A protective device for a valve according to claim 2, wherein a transparent area is provided on the housing.