CN212107157U

CN212107157U - Corrugated pipe regulating valve

Info

Publication number: CN212107157U
Application number: CN202020353746.1U
Authority: CN
Inventors: 韩捷; 安宝海; 袁长亮
Original assignee: Shanghai Pungjia Valve Co ltd
Current assignee: Shanghai Pungjia Valve Co ltd
Priority date: 2020-03-19
Filing date: 2020-03-19
Publication date: 2020-12-08
Anticipated expiration: 2030-03-19

Abstract

The utility model relates to the technical field of valves, in particular to a corrugated pipe regulating valve, wherein an opening communicated with a valve cavity is arranged above a valve body, a sealing plate is arranged in the opening, a corrugated pipe is sleeved on a valve rod and comprises a first pipe body and a second pipe body, the lower end of the first pipe body is connected with the upper end of the second pipe body through a connecting pipe, the upper end of the first pipe body is fixedly arranged on the sealing plate, the lower end of the second pipe body is fixedly arranged on a valve core, and the valve core and the sealing plate are respectively provided with a limiting mechanism for fixing the connecting pipe; the utility model discloses a when the connecting pipe is fixed on the case, only first body is followed the case and is reciprocated shrink or tensile, uses the back for a long time as first body, fixes the connecting pipe on the closing plate, and only the second body is followed the case and is reciprocated shrink or tensile this moment, and first body and second body relay use to the life of bellows has been increased, has prolonged the change time of bellows.

Description

Corrugated pipe regulating valve

Technical Field

The utility model relates to the technical field of valves, concretely relates to bellows adjusting valve.

Background

The corrugated pipe regulating valve is a valve using a corrugated pipe as a valve rod sealing element, is usually used in occasions with strict requirements on valve rod sealing, such as high vacuum occasions and nuclear industry, adopts the corrugated pipe to replace a stuffing box on a common valve or be used together with the stuffing box, ensures that a valve rod, a spring and the like are not corroded, and is widely applied in the industrial field. Bellows governing valve is because the valve rod constantly moves in the use, and the bellows is shrink repeatedly and is tensile, and easy production is broken, and the medium is easy from cracked gap seepage, needs to be changed the bellows this moment, and it is higher nevertheless to change the ripple degree of difficulty to need to develop a bellows governing valve of bellows long service life urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a bellows governing valve is provided, bellows long service life to solve the problem among the prior art.

In order to solve the technical problem, the technical scheme of the utility model is that: a corrugated pipe regulating valve comprises a valve body, wherein a valve cavity is arranged in the valve body, a through hole communicated with the valve cavity is formed in the upper portion of the valve body, a valve cover is fixedly installed above the through hole, a valve rod is movably installed on the valve cover in an up-down mode, a valve core is fixedly installed at the lower end of the valve rod, a valve seat matched with the valve core is fixedly installed in the valve cavity, a sealing plate is arranged in the through hole, and a avoidance hole for the valve rod to penetrate through is formed in the sealing plate; the valve rod is sleeved with a corrugated pipe positioned between the sealing plate and the valve core; the corrugated pipe comprises a first pipe body positioned above and a second pipe body positioned below, the lower end of the first pipe body is connected with the upper end of the second pipe body through a connecting pipe, the upper end of the first pipe body is fixedly installed on the sealing plate and completely covers the avoidance hole, and the lower end of the second pipe body is fixedly installed on the valve core; and the valve core and the closing plate are respectively provided with a limiting mechanism for fixing the connecting pipe.

As a preferred technical scheme, the limiting mechanism comprises a sleeve fixedly installed on the valve core and the closing plate, the corrugated pipe is located in the sleeve, a coil pipe is rotatably installed on the outer side of the connecting pipe, external threads are arranged at the upper end and the lower end of the coil pipe, and internal threads matched with the external threads of the coil pipe are arranged in the sleeve; and a sealing mechanism is also arranged between the connecting pipe and the sleeve.

As the preferred technical scheme, the sealing mechanism comprises an annular protruding part which is positioned in the sleeve, annular cover plates are coaxially and fixedly arranged on the outer sides of the upper end and the lower end of the connecting pipe, and clamping grooves matched with the cover plates are formed in the protruding part.

As a further improvement, a sealing rubber pad is arranged in the clamping groove.

According to a preferable technical scheme, a placing groove matched with the closing plate is formed in the through hole, and the valve cover is fixedly installed on the valve seat through bolts and presses the closing plate.

As a further improvement, an airtight rubber pad is arranged in the placing groove.

According to the technical scheme, the corrugated pipe adjusting valve is characterized in that a through hole communicated with the valve cavity is formed in the upper portion of the valve body, a sealing plate is arranged in the through hole, a corrugated pipe is sleeved on the valve rod and comprises a first pipe body and a second pipe body, the lower end of the first pipe body is connected with the upper end of the second pipe body through a connecting pipe, the upper end of the first pipe body is fixedly installed on the sealing plate, the lower end of the second pipe body is fixedly installed on the valve core, and limiting mechanisms used for fixing the connecting pipe are respectively arranged on the valve core and the sealing plate; the utility model discloses a when the connecting pipe is fixed on the case, the second body can not follow reciprocating and shrink or tensile of case, only first body follows reciprocating shrink or tensile of case, after first body uses for a long time, fix the connecting pipe on the closing plate, first body can not follow reciprocating and shrink or tensile of case this moment, only the second body follows reciprocating shrink or tensile of case, first body and second body relay use, thereby the life of bellows has been increased, the change time of bellows has been prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of the coil of an embodiment of the present invention being threaded into a sleeve located in a closure plate;

fig. 3 is a partially enlarged view of portion i in fig. 2.

In the figure: 1-a valve body; 2-valve cavity; 3-a through opening; 4-valve cover; 5-valve stem; 6-valve core; 7-valve seat; 8-a closing plate; 9-avoiding holes; 10-a bellows; 11-a first tube; 12-a second tubular body; 13-a connecting tube; 14-a sleeve; 15-coil; 16-a projection; 17-a cover plate; 18-a card slot; 19-sealing rubber gasket; 20-placing a groove; 21-airtight rubber pad.

Detailed Description

As shown in fig. 1 to 3, a corrugated pipe regulating valve includes a valve body 1, a valve cavity 2 is arranged in the valve body 1, a through opening 3 communicated with the valve cavity 2 is arranged above the valve body 1, a valve cover 4 is fixedly arranged above the through opening 3, a valve rod 5 is movably arranged on the valve cover 4 up and down, a valve core 6 is fixedly arranged at the lower end of the valve rod 5, a valve seat 7 matched with the valve core 6 is fixedly arranged in the valve cavity 2, a sealing plate 8 is arranged in the through opening 3, and a avoiding hole 9 for the valve rod 5 to pass through is arranged on the sealing plate 8; the valve rod 5 is sleeved with the corrugated pipe 10 positioned between the closing plate 8 and the valve core 6, and the valve rod 5 is isolated from the valve cavity 2 through the valve core 6, the closing plate and the corrugated pipe 10, so that the valve rod 5 is prevented from being corroded by gas in the valve cavity 2. The corrugated pipe 10 comprises a first pipe body 11 positioned above and a second pipe body 12 positioned below, the lower end of the first pipe body 11 is connected with the upper end of the second pipe body 12 through a connecting pipe 13, the upper end of the first pipe body 11 is fixedly installed on the sealing plate 8 and completely covers the avoidance hole 9, and the lower end of the second pipe body 12 is fixedly installed on the valve core 6; and limiting mechanisms for fixing the connecting pipe 13 are respectively arranged on the valve core 6 and the closing plate 8. By fixing the connecting pipe 13 on the limiting mechanism of the valve core 6, in the process of moving the valve rod 5 up and down, the distance between the connecting pipe 13 and the valve core 6 is relatively unchanged, so that the second pipe body 12 between the connecting pipe 13 and the valve core 6 cannot shrink or stretch along with the up-and-down movement of the valve core 6, and only the first pipe body 11 between the connecting pipe 13 and the closing plate 18 shrinks or stretches along with the up-and-down movement of the valve core 6. After the first pipe 10 is used for a long time, the connecting pipe 13 can be fixed on the limiting mechanism of the closing plate 6, and at the moment, in the process of moving the valve rod 5 up and down, the distance between the connecting pipe 13 and the closing plate 8 is relatively unchanged, so that the first pipe 11 between the connecting pipe 13 and the closing plate 8 cannot shrink or stretch along with the up-and-down movement of the valve core 6, only the second pipe 12 between the connecting pipe 13 and the valve core 6 shrinks or stretches along with the up-and-down movement of the valve core 6, and the first pipe 11 and the second pipe 12 are used in a relay mode, so that the service life of the corrugated pipe 10 is prolonged, and the replacement time of the corrugated pipe 10.

The limiting mechanism comprises a sleeve 14 fixedly installed on the valve core 6 and the closing plate 8, the corrugated pipe 10 is located in the sleeve 14, a coil pipe 15 is rotatably installed on the outer side of the connecting pipe 13, external threads are arranged at the upper end and the lower end of the coil pipe 15, internal threads matched with the external threads of the coil pipe 15 are arranged in the sleeve 14, and the purpose of fixing the connecting pipe 12 and the sleeve 14 is achieved by screwing the coil pipe 15 into the sleeve 14; a sealing mechanism is further arranged between the connecting pipe 13 and the sleeve 14.

The sealing mechanism comprises an annular protruding portion 16 located in the sleeve 14, annular cover plates 17 are coaxially and fixedly mounted on the outer sides of the upper end and the lower end of the connecting pipe 13, and clamping grooves 18 matched with the cover plates 17 are formed in the protruding portion 16. When the coil 15 is screwed on the sleeve 14 of the closing plate 8, the first pipe 11 is received in the sleeve 14 and the cover plate 17 is inserted into the slot 18 to isolate the first pipe 11 from the valve cavity 2, thereby preventing the first pipe 11 from being damaged and leaking air after being used for a long time and preventing the gas in the valve cavity 2 from entering the first pipe 11 to corrode the valve rod 5.

And a sealing rubber gasket 19 is arranged in the clamping groove 18 and used for improving the sealing property between the cover plate 17 and the clamping groove 18.

The opening 3 is internally provided with a placing groove 20 matched with the closing plate 8, the valve cover 4 is fixedly arranged on the valve seat 1 through bolts and presses the closing plate 8, and the valve cover 4 is conveniently detached from the valve seat 1 through the bolts so as to replace the sleeve 14 fixed with the connecting pipe 13.

An airtight rubber pad 21 is arranged in the placing groove 20 and used for increasing the sealing performance between the sealing plate 8 and the placing groove 20.

The working principle is as follows: in the initial state, the coil 15 is screwed in the sleeve 14 of the valve core 6, the second pipe body is received in the sleeve 14 of the valve core 6, as shown in fig. 1, in the process of moving the valve rod 5 up and down, the connecting pipe 13 moves up and down along with the valve core 6, so that the second pipe body 12 cannot shrink or stretch along with the up and down movement of the valve core 6, and only the first pipe body 11 shrinks or stretches along with the up and down movement of the valve core 6.

After the first tube 10 is used for a long time, the coil 15 is detached from the sleeve 14 of the valve core 6, the coil 15 is screwed in the sleeve 14 of the closing plate 8, the first tube 11 is retracted into the sleeve 14 of the closing plate 8, and the second tube 12 is withdrawn out of the sleeve 14 of the valve core 6, as shown in fig. 2; after the coil 15 is screwed on the sleeve 14 of the closing plate 8, the cover plate 17 at the upper end of the connecting pipe 13 is clamped into the clamping groove 18 of the sleeve 14, as shown in fig. 3, so that gas in the valve cavity 2 is prevented from entering the first pipe 11 to corrode the valve rod 5 due to the damage and the air leakage of the first pipe 11; at this time, in the process of moving the valve stem 5 up and down, the connecting pipe 13 is fixed in the sleeve 14 of the closing plate 8 so as not to move up and down following the valve body 6, so that the first pipe body 11 does not contract or stretch following the up and down movement of the valve body 6, and only the second pipe body 12 contracts or stretches following the up and down movement of the valve body 6.

The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a bellows governing valve, includes the valve body, be equipped with the valve pocket in the valve body, the top of valve body is equipped with the intercommunication the opening of valve pocket, the top fixed mounting of opening has the valve gap, movable mounting has the valve rod about the valve gap, the lower extreme fixed mounting of valve rod has the case, valve intracavity fixed mounting have with case assorted disk seat, its characterized in that: a sealing plate is arranged in the through hole, and an avoidance hole for the valve rod to pass through is formed in the sealing plate; the valve rod is sleeved with a corrugated pipe positioned between the sealing plate and the valve core; the corrugated pipe comprises a first pipe body positioned above and a second pipe body positioned below, the lower end of the first pipe body is connected with the upper end of the second pipe body through a connecting pipe, the upper end of the first pipe body is fixedly installed on the sealing plate and completely covers the avoidance hole, and the lower end of the second pipe body is fixedly installed on the valve core; and the valve core and the closing plate are respectively provided with a limiting mechanism for fixing the connecting pipe.

2. A bellows-type regulator valve according to claim 1, wherein: the limiting mechanism comprises a sleeve fixedly arranged on the valve core and the closing plate, the corrugated pipe is positioned in the sleeve, a coil pipe is rotatably arranged on the outer side of the connecting pipe, external threads are arranged at the upper end and the lower end of the coil pipe, and internal threads matched with the external threads of the coil pipe are arranged in the sleeve; and a sealing mechanism is also arranged between the connecting pipe and the sleeve.

3. A bellows-type regulator valve according to claim 2, wherein: the sealing mechanism comprises an annular protruding part located in the sleeve, annular cover plates are coaxially and fixedly mounted on the outer sides of the upper end and the lower end of the connecting pipe, and clamping grooves matched with the cover plates are formed in the protruding part.

4. A bellows-type regulator valve according to claim 3, wherein: and a sealing rubber pad is arranged in the clamping groove.

5. A bellows-type regulator valve according to claim 4, wherein: the through opening is internally provided with a placing groove matched with the closing plate, and the valve cover is fixedly arranged on the valve seat through a bolt and presses the closing plate.

6. A bellows-type regulator valve according to claim 5, wherein: an airtight rubber pad is arranged in the placing groove.