CN113028115A

CN113028115A - Valve rod protective sleeve

Info

Publication number: CN113028115A
Application number: CN202110300755.3A
Authority: CN
Inventors: 冯珑; 邢天彪; 刘宇博; 何明骏; 刘攀; 谢冬林; 周厅; 鲍勇胜; 鲍伟明; 陈勇; 李忠; 吴赛婷
Original assignee: Zhejiang Zheneng Lanxi Power Generation Co Ltd
Current assignee: Zhejiang Zheneng Lanxi Power Generation Co Ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-06-25

Abstract

The invention relates to the technical field of protective sleeves, and discloses a valve rod protective sleeve, which comprises: the protection tube is hollow, one end of the protection tube is provided with an opening, and the other end of the protection tube is provided with a closed structure; the protective tube is partially or completely made of transparent materials; the short pipe is arranged at one end of the protective pipe with an opening, an observation window is arranged on the circumferential side wall of the short pipe, and the inside of the short pipe can be observed through the observation window; and the locking nut is arranged at the other end of the short pipe connected with the protection pipe. Through the technical scheme, the problems that the valve is inflexible to close and even blocked due to the fact that the valve rod is exposed to the outside and corroded can be effectively solved based on the arrangement of the protection pipe; based on the protection tube is made of transparent materials, the opening degree of the valve can be observed, and the current state of the valve is judged. Based on the arrangement of the short pipe and the locking nut, the protection pipe can be connected to a hand wheel of the valve, so that the protection pipe can rotate along with the hand wheel, and the protection pipe is prevented from falling off from the valve rod.

Description

Valve rod protective sleeve

Technical Field

The invention relates to the technical field of protective sleeves, in particular to a valve rod protective sleeve.

Background

Valves are plumbing accessories used to open and close a pipe, control flow direction, regulate and control parameters of the transport medium (temperature, pressure and flow). According to their function, they can be classified into shut-off valves, check valves, regulating valves, and the like. The valve is a control part in a fluid conveying system and has the functions of stopping, adjusting, guiding, preventing counter flow, stabilizing pressure, shunting or overflowing and relieving pressure and the like. Valves used in fluid control systems range in variety and size from the simplest shut-off valves to the variety of valves used in extremely complex autonomous systems.

In actual production operation, the environment of some valves is poor, and particularly, the manual valve is of an open-stem type. The valve rod is exposed outside for a long time, and is easy to rust when being blown by wind and rain, so that the valve is inflexible to close and even blocked. A common solution to this problem is to use a sleeve that is directly sleeved over the sleeve. This approach has several drawbacks. One is as follows: the opening degree of the valve cannot be seen, and if the valve is blocked, an operator cannot know whether the valve is in place or jammed. The second is that: the sleeve has no problem in the fully-opened state of the valve, the sleeve can be sleeved on the valve rod, but when the sleeve is fully closed, the valve rod positioned on the outer side of the hand wheel of the valve is shortened, and therefore the sleeve can easily fall off from the valve rod.

Disclosure of Invention

The invention aims to provide a valve rod protective sleeve to solve the technical problems in the background technology.

In order to achieve the above object, the present invention provides a valve stem boot including:

the protection tube is hollow, one end of the protection tube is provided with an opening, and the other end of the protection tube is provided with a closed structure; the protective tube is partially or completely made of transparent materials;

the short pipe is arranged at one end, provided with an opening, of the protection pipe, an observation window is arranged on the circumferential side wall of the short pipe, and the inside of the short pipe can be observed through the observation window; the short pipe is made of metal material;

and the locking nut is arranged at the other end of the short pipe connected with the protection pipe.

Through the technical scheme, the problems that the valve is inflexible to close and even blocked due to the fact that the valve rod is exposed to the outside and corroded can be effectively solved based on the arrangement of the protection pipe; based on the protection tube is made of transparent materials, the opening degree of the valve can be observed, and the current state of the valve is judged. Based on the arrangement of the short pipe and the locking nut, the protection pipe can be connected to the hand wheel of the valve, so that the protection pipe can rotate along with the hand wheel, and the protection pipe is prevented from falling off from the valve rod.

Further, the protection tube is made of transparent acrylic or transparent toughened glass.

Further, the closed structure is a hemispherical end cover integrally formed with the protection tube.

Further, the closed structure is a soft plug detachably connected with the protection tube.

Further, the number of the observation windows is three, and the three observation windows are rotationally symmetrical around the axis of the short pipe.

Furthermore, the inner wall of the short pipe is provided with an external thread, and the outer wall of one end of the protection pipe connected with the short pipe is provided with an internal thread matched with the external thread; the protection pipe is in threaded connection with the short pipe.

Further, the protection pipe is spliced with the short pipe.

Furthermore, one end of the protection tube is inserted into the short tube, and the outer wall of the protection tube is tightly attached to the inner wall of the short tube;

or the like, or, alternatively,

one end of the protection tube is sleeved outside the short tube, and the outer wall of the short tube is tightly attached to the inner wall of the protection tube;

or the like, or, alternatively,

the short pipe faces the side wall of one end of the protection pipe, an annular groove is formed in the side wall of one end of the short pipe, one end of the protection pipe is inserted into the annular groove, and the inner wall and the outer wall of the protection pipe are tightly attached to the inner walls of the two sides of the annular groove.

Furthermore, an annular limiting groove is formed in the side wall of one end, facing the protection pipe, of the short pipe; a lug with the same shape as the annular limiting groove is arranged at the opening edge of one end of the protection tube connected with the short tube; the lug can insert in the annular limiting groove, and the annular limiting groove can limit the lug to move reversely.

Further, the bump comprises a connecting part and a hook part; one end of the connecting part is connected with the protective tube, the other end of the connecting part is connected with the hook part, and the longitudinal section of the hook part is of an inverted trapezoidal structure.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

FIG. 1 is a schematic diagram of the construction of one embodiment of the valve stem boot of the present invention;

FIG. 2 is a schematic structural view of one embodiment of the spool;

FIG. 3 is a schematic structural view of an embodiment of a protective tube;

FIG. 4 is a schematic diagram of one implementation of a closed structure;

FIG. 5 is a cross-sectional view of another embodiment of the spool;

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is a cross-sectional view of another embodiment of a protective tube;

FIG. 8 is an enlarged view of portion B of FIG. 7;

FIG. 9 is a schematic view of the valve stem boot of the present invention in one configuration in use.

Description of the reference numerals

10 protection tube 11 ring-shaped limiting groove

20 closed structure 30 short pipe

40 lock nut 31 viewing window

50 bump 51 connection

52 hook part

Detailed Description

The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the present invention, the use of the terms of orientation such as "upper and lower" in the case where no description is made to the contrary generally means the orientation in the assembled and used state. "inner and outer" refer to the inner and outer contours of the respective component itself.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The present invention provides a valve stem boot, as shown in fig. 1, comprising: a protective tube 10, a short tube 30 and a locking nut 40. The protective tube 10, the short tube 30 and the locking nut 40 are coaxially arranged.

Wherein, the protection tube 10 is hollow and at least one end is provided with an opening. If the protective tube 10 is provided with an opening only at one end, its other end is closed. If both ends of the protection tube 10 are provided with openings, a closed structure (as shown in fig. 3) is arranged at one of the openings, and only one opening is left open. The protection tube 10 is partially or entirely made of a transparent material, so that a worker can observe the opening degree of the valve through the protection tube 10 and judge the current state of the valve, such as in place or jammed. The transparent material can be transparent acrylic or transparent toughened glass. In the invention, two such closure structures are provided. The first is a hemispherical end cap integrally formed with the protective tube 10. A second type of cork (as shown in figure 4). The soft plug can ensure the sealing performance of the protection tube 10, prevent rainwater from entering the corrosion valve rod, and can be detachably connected with the protection tube 10. The soft plug can be made of wood material or rubber material.

The short pipe 30 is disposed at one end of the protection pipe 10 having an opening, and an observation window 31 (as shown in fig. 2) is disposed on a circumferential side wall of the short pipe 30, through which the inside of the short pipe 30 can be observed, and the design of the protection pipe 10 ensures that the position of the valve stem can be seen all the way. In a preferred embodiment, as shown in fig. 2, the number of said observation windows 31 is three, and three of said observation windows 31 are rotationally symmetrical about the axis of said short pipe 30. This ensures that the valve stem is still visible to the bottom. Preferably, the viewing window 31 extends in the axial direction of the short tube 30, so that the valve stem can be seen more fully. The short tube 30 may be made of a metal material, such as iron, copper, or an aluminum alloy.

The locking nut 40 is provided at the other end of the short pipe 30 connected to the protective pipe 10. The lock nut 40 and the short tube 30 may be connected together by welding or may be integrally formed.

Therefore, based on the arrangement of the protection tube 10, the problems that the valve is not flexible to be locked and even blocked due to the fact that the valve rod is exposed outside and corroded can be effectively solved; based on the fact that the protection tube 10 is made of transparent materials, the opening degree of the valve can be observed, and the current state of the valve can be judged. Based on the arrangement of the short pipe 30 and the locking nut 40, the protection pipe 10 can be connected to the hand wheel 60 of the valve, so that the protection pipe 10 can rotate along with the hand wheel 60, and the protection pipe 10 is prevented from falling off from the valve rod.

In the above, the connection relationship between the short pipe 30 and the protection pipe 10 may be a threaded connection or a plug connection.

The threaded connection may be achieved by providing an external thread on an inner wall of the short pipe 30 and providing an internal thread adapted to the external thread on an outer wall of an end of the protection pipe 10 connected to the short pipe 30, so as to achieve the threaded connection between the protection pipe 10 and the short pipe 30.

The plugging mode can be realized by the following three structures:

the first embodiment is as follows: one end of the protection tube 10 is inserted into the short tube 30 and the outer wall of the protection tube 10 is closely attached to the inner wall of the short tube 30.

The second embodiment is as follows: one end of the protection tube 10 is sleeved outside the short tube 30, and the outer wall of the short tube 30 is tightly attached to the inner wall of the protection tube 10.

The third concrete implementation mode: an annular groove 32 is formed in the side wall of the short pipe 30 facing one end of the protection pipe 10, one end of the protection pipe 10 is inserted into the annular groove 32, and the inner wall and the outer wall of the protection pipe are tightly attached to the inner walls of the two sides of the annular groove 32.

The above three embodiments are all to achieve the connection between the short pipe 30 and the protective pipe 10 by the frictional force generated between the protective pipe 10 and the short pipe 30. The connection mode of the plug connection has the advantages that the short pipe 30 and the protection pipe 10 can be detached and are convenient to carry. Of course, the connection between the short tube 30 and the protective tube 10 can also be achieved by interference fit.

In addition, a preferred connection between the protective tube 10 and the short tube 30 is provided. Specifically, as shown in fig. 5 and 6, an annular limiting groove 11 is provided in a side wall of the short pipe 30 facing one end of the protective pipe 10; the opening edge of one end of the protection tube 10 connected with the short tube 30 is provided with a projection 50 (shown in fig. 7 and 8) having the same shape as the annular limiting groove 11. The projection 50 can be inserted into the annular limiting groove 11, and the annular limiting groove 11 can limit the reverse movement of the projection 50, i.e. the projection 50 is difficult to pull out once inserted into the annular limiting groove 11. As shown in fig. 8, the bump 50 includes a connection portion 51 and a hook portion 52; one end of the connecting part 51 is connected with the protective tube 10, the other end is connected with the hook part 52, and the connecting part 51 is gradually narrowed from top to bottom; the hook 52 has an inverted trapezoidal longitudinal section. It should be noted that at least one of the protrusion 50 and the annular restraining groove 11 has a certain deformation capability, so that the protrusion 50 can be inserted into the annular restraining groove 11, for example, the protrusion 50 is made of plastic.

Furthermore, if the diameter of the protective tube 10 is larger than that of the valve copper nut, the entire protective tube 10 looks too large and is not aesthetically pleasing in appearance, in view of aesthetic problems. The protective tube 10 is beautiful if it has a small diameter. But will jam on top of the copper nut 70 and the locking nut 40 will not be able to secure the hand wheel 60. Therefore, the inventor designs the locking nut 40 to be thickened, and ensures that the thickness of the locking nut 40 after being locked is flush with that of the copper nut, so that the attractiveness can be improved by adopting a sleeve with a smaller diameter.

The working principle of the invention is briefly explained as follows:

as shown in fig. 9, the handwheel 60 is fixedly connected with the copper nut 70, and the handwheel 60 is sleeved outside the copper nut 70; the hand wheel 60 is in threaded connection with the screw rod 80, the copper nut 70 is in threaded connection with the screw rod 80, and the outer peripheral surface of the copper nut 70 is provided with threads matched with the locking nut 40. When the screw 80 needs to be protected, the screw 80 is inserted into the protection tube 10, the protection lock nut 40 is rotated, and the lock nut 40 is assembled to the copper nut 70 and tightened. Thus, when the handwheel 60 is rotated, the valve stem protection sleeve of the present invention will also rotate. Even if the screw 80 is shortened, the protective tube 10 does not fall off. Based on the arrangement of the protection tube 10, the problems that the valve is not flexible to close and even blocked due to the fact that the valve rod is exposed outside and corroded can be effectively solved; based on the fact that the protection tube 10 is made of transparent materials, the opening degree of the valve can be observed, and the current state of the valve can be judged.

The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. A valve stem boot, the valve stem boot comprising:

a protection tube (10) which is hollow and provided with an opening at one end and a closed structure (20) at the other end; the protective tube (10) is partially or completely made of transparent materials;

a short pipe (30) provided at one end of the protective pipe (10) having an opening, an observation window (31) being provided on a circumferential side wall of the short pipe (30), the inside of the short pipe (30) being observable through the observation window (31); the short pipe (30) is made of metal material;

and the locking nut (40) is arranged at the other end of the short pipe (30) connected with the protection pipe (10).

2. The stem guard according to claim 1, characterized in that the protective tube (10) is made of transparent acrylic or transparent tempered glass.

3. Valve stem boot according to claim 1, characterized in that the closure structure is a hemispherical end cap integrated with the protective tube (10).

4. Valve stem boot according to claim 1, characterized in that the closure structure is a cork detachably connected to a protective tube (10).

5. Valve stem protective sleeve according to claim 1, characterized in that said observation windows (31) are provided in three, three said observation windows (31) being rotationally symmetrical about the axis of said short tube (30).

6. The valve stem protection sleeve according to claim 1, characterized in that the inner wall of the short pipe (30) is provided with an external thread, and the outer wall of the end of the protection pipe (10) connected with the short pipe (30) is provided with an internal thread matched with the external thread; the protective tube (10) is in threaded connection with the short tube (30).

7. Valve stem protection sleeve according to claim 1, characterized in that said protective tube (10) is plugged with said short tube (30).

8. The valve stem boot of claim 7, wherein:

one end of the protection tube (10) is inserted into the short tube (30), and the outer wall of the protection tube (10) is tightly attached to the inner wall of the short tube (30);

or the like, or, alternatively,

one end of the protection tube (10) is sleeved outside the short tube (30), and the outer wall of the short tube (30) is tightly attached to the inner wall of the protection tube (10);

or the like, or, alternatively,

the short pipe (30) faces the side wall of one end of the protection pipe (10) and is provided with an annular groove (32), one end of the protection pipe (10) is inserted into the annular groove (32), and the inner wall and the outer wall of the protection pipe are tightly attached to the inner walls of the two sides of the annular groove (32).

9. Valve stem protection sleeve according to claim 1, characterized in that an annular stop groove (11) is provided in the side wall of the short tube (30) towards the end of the protective tube (10); a bump (50) with the same shape as the annular limiting groove (11) is arranged at the opening edge of one end of the protection tube (10) connected with the short tube (30); the lug (50) can be inserted into the annular limiting groove (11), and the annular limiting groove (11) can limit the lug (50) to move reversely.

10. The valve stem boot of claim 1, wherein the projection (50) comprises a connecting portion (51) and a hook portion (52); one end of the connecting part (51) is connected with the protective tube (10), the other end of the connecting part is connected with the hook part (52), and the longitudinal section of the hook part (52) is of an inverted trapezoidal structure.