CN114962774A

CN114962774A - Valve rod protective sleeve with indicating ring and valve with protective sleeve

Info

Publication number: CN114962774A
Application number: CN202210493716.4A
Authority: CN
Inventors: 李明树
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-05-08
Filing date: 2022-05-08
Publication date: 2022-08-30

Abstract

A valve stem protecting sleeve for pipeline valve features that a height-position indicating ring of valve stem is arranged in said protecting sleeve, so the height position of valve stem can be known remotely by observing said indicating ring. An indicating ring is arranged outside the sleeve body and can synchronously lift along with the lifting of the valve rod. The method comprises a magnetic attraction method, wherein a sleeve body is made of non-magnetic materials such as plastics and aluminum, a magnet is fixedly arranged at the top of a valve rod in the sleeve, an indicating ring outside the sleeve is made of steel or other magnetic materials, and the magnet attracts the indicating ring to lift. The second method is a needling method: two through grooves are formed in two sides of the sleeve, a pointer which can rotate relative to the valve rod is installed at the top end of the valve rod, two ends of the pointer penetrate out of the protective sleeve through the through grooves, and the indicating rings are installed at two ends of the pointer. Thirdly, a rope traction method: the top of the valve rod is tied with a rope, the rope passes through a side sliding wheel at the top end of the protective sleeve to the side part of the bottom of the protective sleeve and then returns to the side surface of the upper part of the protective sleeve through another pulley, an indicating ring is connected to the position corresponding to the top of the valve rod, a rope is connected behind the indicating ring, and a spring or a gravity hammer is connected behind the rope. The three methods can make the indicating ring and the valve rod lift synchronously. The attached figure is a protective sleeve with the simplest structure by a magnetic attraction method.

Description

Valve rod protective sleeve with indicating ring and valve with protective sleeve

Technical Field

The invention relates to a valve rod protective sleeve for a pipeline valve, in particular to a valve rod protective sleeve which is provided with a valve rod indicating ring and can observe the height position of a valve rod by observing the indicating ring at a long distance, and a valve provided with the 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). The valve stem is one of the important parts of the valve. The upper end of the valve rod is connected with an actuating mechanism or a handle, and the lower end directly drives the valve core to move or rotate so as to realize the opening and closing or adjusting function of the valve.

In actual production operation, the environment of the valve is generally poor, and particularly, the open-stem manual valve is used. The valve rod is exposed for a long time, and besides wind and rain, dust and silt are stuck on grease coated on the valve rod, so that the valve rod is easy to rust, the valve is inflexible to open and close, and even the valve cannot be closed. For such problems, the valve rod is often directly exposed on site due to no good solution, and a sleeve is also used for directly sleeving the valve rod. 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: when the pipeline is debugged, an operator cannot observe the opening and closing of the valve, so that accidents are easily caused. The third step is that: when the valve is completely closed, the protective sleeve is not fixed and is easy to fall off and lose.

To solve this problem, many efforts have been made by those in the industry, and most of them, a protective cover using a transparent material and telescoping is applied. Set the protective sheath to telescopic, the protective sheath can be flexible along with reciprocating of valve rod, and operating personnel can observe the instant state of opening of valve rod according to the flexible degree of protective sheath. Although the opening degree of the valve rod can be partially observed by adopting the valve rod protective sleeve in the telescopic mode, the valve rod protective sleeve cannot be observed to the last section of the telescopic sleeve. And the protective sleeve with the structure has the disadvantages of complex structure, high requirement on production process and troublesome manufacture. Another method is to use a transparent material to make the protective sleeve. But this is only a conceivable one and cannot be achieved at all. The reasons are two: one is the light problem. It is known that a glass is clearly seen when a strong light is viewed from a weak light, and is not clearly seen when a weak light is viewed from a strong light. It is known to think of the situation that the house is seen from the outside at daytime and at night (turning on the light). Therefore, looking at the valve stem in the transparent sleeve from a distance is not clear in most cases. The second is also more important: the valve rod is generally coated with butter, and the inner wall of the protective sleeve cannot be contacted with the valve rod, so that the transparent material is not transparent after the valve rod is used for a long time. For these reasons, none of these methods can be popularized and used on site.

Disclosure of Invention

The invention aims to provide several spare structures of a valve rod protective sleeve which have simple structures and easy manufacture, ensure the normal work of a valve rod and particularly can remotely observe the opening degree of a valve, namely the height of the valve rod, and a valve provided with the protective sleeve.

The invention is realized by the following steps: a valve rod position indicating ring is arranged outside the valve rod protective sleeve, and when the valve rod ascends and descends due to opening and closing of the valve, the indicating ring ascends and descends synchronously along with the ascending and descending of the valve rod. The synchronous lifting method and structure of the indicating ring and the valve rod are various, one is a magnetic attraction method, the protective sleeve is made of non-magnetic materials such as plastics and aluminum, a magnet is fixedly arranged at the top of the valve rod in the sleeve, and the indicating ring outside the sleeve is made of steel or other magnetic materials. When the valve rod moves up and down in the sleeve, the indicating ring outside the sleeve moves up and down along with the magnet. The magnetic attraction method can also be made into telescopic type with several tubes sleeved mutually, when the magnetic attraction method is made into telescopic type, the top cover of the sleeve body can be made of magnetic materials, and when the valve rod descends, the magnet at the top of the valve rod can attract the valve rod to descend firstly. The second method is a needling method: two through grooves are formed in two sides of the protective sleeve, a pointer capable of rotating relative to the valve rod is installed at the top end of the valve rod, two ends of the pointer penetrate out of the protective sleeve through the through grooves, the indicating ring is installed at two ends of the pointer, and when the valve rod goes up and down, the valve rod drives the pointer and the pointer drives the indicating ring to go up and down synchronously. The protective sleeve is likely to be elastically deformed after being grooved at two sides, and therefore an anti-deformation reinforcing ring can be added at a necessary position. Thirdly, a rope traction method: the top of the valve rod is tied with a rope, the rope passes through a pulley on the side part of the top end of the protective sleeve to the side part of the bottom of the protective sleeve and then returns to the side surface of the upper part of the protective sleeve through another pulley, an indicating ring is connected to the position corresponding to the top of the valve rod, a rope is connected behind the indicating ring, and a spring or a gravity hammer is connected behind the rope. When the valve rod descends, the valve rod drives the rope and the rope drives the indicating ring to descend synchronously (the spring is pulled at the moment), when the valve rod ascends, the spring or the gravity hammer drives the rope and the rope drives the indicating ring to ascend (the number of the rope can be 1 or 2-3), and the magnetic attraction method and the pointer method protective sleeve can also be made into a telescopic type.

Drawings

Fig. 1 is a front view of a schematic structural diagram of a valve rod and a valve rod protecting sleeve of a single cylinder type structure by a magnetic attraction method.

Fig. 2 is a front view of a schematic structural diagram of a valve rod and a valve rod protection sleeve of a magnetic attraction telescopic structure according to the present invention. The figure is a 2-cylinder type, and the structure of a multi-cylinder type is similar.

Fig. 3 is a front view of a structure of a valve stem and a valve stem protection sleeve of the pointer type structure.

Fig. 4 is a cross-sectional view taken along the plane a-a in fig. 3.

Fig. 5 is a partially enlarged view of fig. 3.

Fig. 6 is a schematic view of a through slot of the stem boot of the pointer-type structure shown in fig. 3.

Fig. 7 is a schematic view of a valve stem protection sleeve of a rope pulling structure according to the present invention.

In the figure:

1: hand wheel fixing nut 2: fastener 3: valve rod 4: the 1 st section 4b of the protective sleeve body or the telescopic sleeve body is the 2 nd section 4c of the telescopic protective sleeve: the combined protective sleeve chassis 5: the indicating ring 6: the top cover 7: fastener 8: magnet 9: non-magnetic gasket 10: gasket 11: pointer 12: pointer shaft 13: reinforcing ring 14: through slots 15 on the protective sleeve: spring 16: pulley 17: rope 18: a rope tying ring 19, a sleeve pressing ring.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

Fig. 1 is a magnetic suction valve rod protective sleeve of the valve. The main components include a protective sleeve 4, a magnet 8 and an indicator ring 5. The protective sleeve body 4 is sleeved on the valve rod 3 and fixed on the hand wheel fixing nut 1 through the fastener 2, the magnet 8 is fixed on the valve rod 3 through the fastener 7 and the non-magnetic gasket 9, and the indicating ring 5 is attracted by the magnet 8 through the protective sleeve body 4 and ascends and descends along with the ascending and descending of the valve rod. The outer part of the protective sleeve body is painted with marks of the upper dead point and the lower dead point of the valve rod, a certain number of small grids (for example, 10 small grids) can be drawn between the upper dead point and the lower dead point, and an operator can see the closing condition of the valve at a remote place. Because it has only one cylinder, it can be called single-cylinder protective sleeve.

Fig. 2 is a retractable magnetic attraction protective sleeve. The sleeve body 4 consists of a 1 st section 4 of a telescopic sleeve combined sleeve body, a 2 nd section 4b of a telescopic combined sleeve and a combined protective sleeve chassis 4c, the top cover 6 is made of magnetic materials such as steel or embedded with the magnetic materials, and the rest parts are the same as those in the figure 1. When the valve rod descends, the magnet magnetic force attracts the indicating ring to descend, and simultaneously attracts the 2 nd section 4b of the sleeve body to descend, when the indicating ring descends to a certain height, the 2 nd section 4b of the sleeve body touches the bottom, and at the moment, the valve rod increasing force overcomes the attraction between the magnet 8 and the top cover 6 to continue descending. The sock chassis 4c is a possible choice for different ways of manufacturing the sock body. The rest items are the same as the single-cylinder protective sleeve.

Fig. 3 is a front view of a valve stem and a valve stem protection sleeve of the pointer structure. The main components are composed of a protective sleeve body 4 with a through groove 12, a pointer 11 and an indicating ring 5. The protective sheath body 4 is sleeved on the valve rod 3 and fixed on the hand wheel fixing nut 1 through the fastener 2, the pointer 11 is installed at the top of the valve rod 3 through the pointer shaft 12, and the tip part of the pointer extends out of the protective sheath through groove. The pointer can rotate around the pointer shaft and can move up and down along with the valve rod in the through groove of the sleeve body. The indicating ring 5 is fixed at the tip of the pointer outside the sleeve body. When the valve rod goes up and down, the pointer drives the indicating ring to go up and down, and if the sleeve body rotates, the pointer can also rotate along with the sleeve body. The valve rod and the valve rod protective sleeve of the pointer type structure can also be made into a telescopic type.

Fig. 7 is a front view of a valve stem boot of a rope pulling arrangement according to the present invention. The main components of the device mainly comprise a protective sleeve body 4, an indicating ring 5, a pulley 16 and a rope 17. The rope is tied on a rope tying ring 18 which can rotate on the top of the valve rod 3, the rope 17 passes through the side part of the top end of the sleeve body 4 to the side part of the bottom of the sleeve body and then returns to the side surface of the upper part of the sleeve body through another pulley, the indicating ring 5 is connected with the position corresponding to the top of the valve rod 3, the back of the indicating ring 5 is also connected with a rope, and the back of the rope is connected with a spring 15 or a gravity hammer. When the valve rod 3 descends, the valve rod 3 drives the rope 17 and the rope 17 drives the indicating ring 5 to descend synchronously (the spring 15 is pulled at the moment), when the valve rod 3 ascends, the spring 15 or the gravity hammer drives the rope and the rope drives the indicating ring to ascend (the rope can be 1 or 2-3.)

The bottom structures of the sleeve bodies of the schemes can be universal. The sleeve body can be fixed on the hand wheel by using a fastener shown in the figure, and other modes such as threads, binding bands and the like can also be used. When there is no opening above the cover and the bottom of the cover is well sealed, the necessary breathing hole should be set in the right position in consideration of the air flow problem caused by the lifting of the valve rod.

Of the above 3 schemes, the 1 st magnetic attraction method is the simplest to implement, and thus can be used in most cases. It also has disadvantages: the sleeve body material cannot use steel which is most easily obtained and has high strength, but only can use non-magnetic materials such as plastics or aluminum and the like; secondly, the cleaning requirement outside the sleeve body is high, the sleeve body cannot be too dirty, and the up-down lifting of the indicating ring can be influenced. The 2 nd pointer method is the most reliable method and can use steel, but 2 through grooves are arranged on two sides of the pointer method, and although elastic shielding sheets which do not influence the lifting of the pointer and the indicating ring can be arranged beside the through grooves, water and dust can enter the sleeve. The 3 rd rope pulling method does not have the disadvantages of the two, but the structure is slightly complicated. The scheme can be selected for different requirements.

The sock chassis 4c is a possible choice for different ways of manufacturing the sock body. The rest items are the same as the single-cylinder protective sleeve.

In the various protective sleeves of any mode, the connection and fixation of the chassis and the hand wheel or the hand wheel compression nut can be in various forms such as a fastener, a thread, a binding belt and the like. The use of an overband collar 19 is another form of protective sleeve that may be used. The sleeve pressing ring 19 is fixed on the hand wheel fixing nut 1 through the fastener 2, the sleeve pressing ring 19 is movably matched with the base plate of the sleeve 4, and when the sleeve pressing ring 19 rotates along with the hand wheel, the sleeve can not rotate or can rotate less. The various forms of fixation described in the figures may be interchanged or used in combination.

In the various protective sleeves of any mode, marks of upper dead points and lower dead points of the valve rod are painted on the outer side of the protective sleeves, and a certain number of equally divided small lattices (for example, 10 small lattices) can be drawn between the upper dead points and the lower dead points. In particular, the cells can be divided according to the flow area, which is more convenient for workers to operate.

During valve design, production, can join in marriage this type of protective sheath of dress. And the valve rod protective sleeve is processed and configured during valve production, so that the valve is simpler, better in quality and lower in cost.

Claims

1. The utility model provides a valve rod protective sheath of pipeline valve which characterized by: the main components of the protective sleeve are as follows: the device comprises a sleeve body which is sleeved on the valve rod and fixed on a hand wheel or a hand wheel fixing nut, an indicating ring which is arranged outside the sleeve body and can lift along with the valve rod, and an indicating ring driving device, wherein when the valve rod lifts, the indicating ring and the valve rod lift synchronously.

2. A valve stem boot according to claim 1, wherein: the synchronous lifting of the indicating ring and the valve rod can be realized by a magnetic suction method: the sleeve body of the protective sleeve is made of non-magnetic materials such as plastics or aluminum, the indicating ring is made of magnetic materials such as steel, the driving indicating ring is a magnet which is arranged in the sleeve and fixed at the top of the valve rod, and when the valve rod goes up and down, the magnet attracts the indicating ring to go up and down simultaneously.

3. A magnetic stem grommet according to claim 2, wherein: when the telescopic valve rod is made into a telescopic type, the top cover of the sleeve body can be made of magnetic materials or embedded with the magnetic materials, and when the valve rod descends, the magnet on the top of the valve rod can attract the valve rod to descend firstly.

4. A valve stem boot according to claim 1, wherein: the synchronous lifting of the indicating ring and the valve rod can be realized by a pointer method: two through grooves are formed in two sides of the protective sleeve, a pointer capable of rotating relative to the valve rod is installed at the top end of the valve rod, the two ends of the pointer penetrate out of the protective sleeve through the through grooves, the indicating ring is installed at two ends of the pointer, and when the valve rod goes up and down, the valve rod drives the pointer and the pointer drives the indicating ring to go up and down synchronously.

5. The valve stem boot of claim 4, wherein: in order to prevent the protective sleeve from deforming after being slotted, a reinforcing ring for preventing the protective sleeve from deforming can be added at a proper position of the protective sleeve.

6. A valve stem boot according to claim 1, wherein: the synchronous lifting of the indicating ring and the valve rod can be realized by a rope traction method: the top of the valve rod is connected with a rope, the direction of the valve rod is changed through the two pulleys, the indicating ring is connected with the indicating ring, a rope is further connected with a spring or a gravity hammer behind the indicating ring, when the valve rod descends, the valve rod drives the rope and the rope to drive the indicating ring to descend synchronously (the spring is pulled at the moment), and when the valve rod ascends, the spring or the gravity hammer drives the rope and the rope to drive the indicating ring to ascend.

7. A valve stem boot according to claim 1, wherein: the small grid division between the upper dead point and the lower dead point outside the sleeve body can be divided according to the valve overflowing area, and can also be equally divided according to the height of the valve rod and the overflowing area.

8. A valve stem protector according to claim 1 wherein the protector is fitted when the valve is designed and manufactured to provide a valve fitted with the protector.