CN105179718A - Valve - Google Patents
Valve Download PDFInfo
- Publication number
- CN105179718A CN105179718A CN201510600986.0A CN201510600986A CN105179718A CN 105179718 A CN105179718 A CN 105179718A CN 201510600986 A CN201510600986 A CN 201510600986A CN 105179718 A CN105179718 A CN 105179718A
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- Prior art keywords
- valve
- valve rod
- cover body
- gap
- opening
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/12—Covers for housings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a valve. The valve comprises a valve body, a valve cover arranged on an opening in the top of the valve body, a valve rod penetrating the valve cover in a sealed manner and extending into the valve body, a valve flap connected to the bottom of the valve rod, a valve seat arranged in the valve body and provided with an opening, padding arranged between the valve cover and the outer wall of the valve rod in a sealed manner and a pressing assembly arranged on the valve rod in a sleeving manner and used for pressing the padding. The valve rod moves under the external force action to drive the valve flap to open or close the opening in the valve seat. The valve further comprises a vacuum hood arranged on the valve cover in a sealed manner, and the valve cover and the vacuum hood form a sealing cavity. A leakage detection opening is formed in the valve cover communicated with the vacuum hood and/or the sealing cavity and used for detecting the leakage condition of the padding. When the leakage condition of the padding is tested, a helium leakage detection instrument is arranged on the leakage detection opening, the valve body is filled with helium, the sealing cavity is vacuumized, and the airtightness level of the valve is judged by detecting whether helium is sucked out from the sealing cavity through the leakage detection instrument or not and the suction amount.
Description
Technical field
The present invention relates to the sealing detection technical field of valve, be specifically related to a kind of valve.
Background technique
Valve is the controlling component in fluid delivery system, has cut-off, adjustment, water conservancy diversion, prevents the functions such as adverse current, voltage stabilizing, shunting or overflow pressure relief, can be widely used in the feedway of compressible medium or incompressible medium.Existing valvular sealing mainly relies on the filler arranged between valve gap support and valve rod to realize.
At present, along with environmental protection concept is extensively paid attention to by people, people more and more pay attention to the packing leaking situation of valve, the packing leaking phenomenon of valve invisible in the past, not only affect the normal use of valve, also can cause the leakage of valve in-vivo medium, the leakage of medium can cause various pollution or damage human body.Meanwhile, the leakage situation of filler directly reflects whether the sealability of valve meets the requirements, and namely people require more and more higher to the sealability of valve, and the grade of the valve of sealability its correspondence higher of valve is higher.
In order to carry out level authentication test to the sealability of valve, be badly in need of testing the packing leaking situation of valve, the method of in prior art, the Reliability of Packing Seal of valve being tested mainly by detector probe to carrying out multiple detection around valve packing, judge the sealability of valve with the numerical value that leakage rate in Check point is maximum, and then certification is carried out to the sealability grade of valve.Although the method can carry out preliminary certification to the sealability of valve, but by means of only the partial points detected around valve packing, certification is carried out to the sealability of valve entirety, inevitably in testing process, there is error, be difficult to the leakage situation reflecting valve packing exactly, affect the level authentication of valve seal performance.
Summary of the invention
Therefore, technical problem to be solved by this invention is to overcome the defect being difficult to test exactly packing leaking situation in prior art in the certification of valve seal performance rate, thus provides a kind of and have the valve can testing the evacuated housing of packing leaking situation exactly.
For this reason, the present embodiment provides a kind of valve, comprises
Valve body, has open top;
Valve gap, is sealedly connected on the top open part of described valve body;
Valve rod, valve gap described in hermetically passing and stretch into valve inner;
Flap, is connected to the bottom of valve rod and is positioned at valve inner;
Valve seat, is arranged on valve inner and has opening;
Filler, sealing is arranged between described valve gap and described valve rod outer wall;
Hold down assembly, be set on described valve rod, for compressing described filler;
Described valve rod can drive flap to open or close on described valve seat opening at the move under influence of external force; Also comprise
Evacuated housing, sealing is arranged on described valve gap, and forms Seal cage with described valve gap, by described filler, holding down assembly is sealed in described Seal cage, on described evacuated housing, or/and the valve gap be communicated with described Seal cage offers leak detection mouth, for detecting the leakage situation of described filler.
Above-mentioned valve, described evacuated housing comprises
Cover body, opening down, stuffing box gland is located on described valve rod, and bottom opening sealing is fixed on described valve gap, to form described Seal cage.
Above-mentioned valve, described evacuated housing comprises
First cover body, sealing is fixed on valve gap, opening up;
Top cover, stuffing box gland is located on described valve rod;
Second cover body, is sealedly connected on the outer wall of described top cover, opening down;
Fixing-assembly, is sealedly and fixedly connected described first cover body, the second cover body, to make to form described Seal cage between described first cover body, the second cover body, described top cover and described valve gap.
Above-mentioned valve, described fixing-assembly comprises
First connecting base, the top being fixed on the first cover body stretches out in the horizontal direction, has the first through hole;
Second connecting base, is fixed on upper bottom the second cover body and stretches out in the horizontal direction, having the second through hole;
Link, is fixedly connected with described first connecting base with the second connecting base through described first through hole, the second through hole;
Sealing, is arranged on the surface of contact of described first connecting base and the second connecting base, for sealing the gap between described first connecting base and the second connecting base surface of contact.
Above-mentioned valve, also comprises limit assembly, to rotate in a circumferential direction motion, to make valve rod under external force, only in short transverse, doing upper and lower moving for limiting valve rod.
Above-mentioned valve, described limit assembly comprises
Column, is at least two, is directly fixed on valve gap;
Directed block, is fixedly connected in the horizontal direction on valve rod, has at least one end to be slidably connected on column;
When valve rod does upper and lower motion, directed block is driven to do upper and lower moving along column outer wall.
Above-mentioned valve, described limit assembly comprises
Support, is fixed on valve gap, and the short transverse along valve rod extends, and is connected on the bottom of described top cover;
Column, is at least two, is fixedly connected on described top cover;
Directed block, is fixedly connected in the horizontal direction on valve rod, has at least one end to be slidably connected on column;
When valve rod does upper and lower motion, directed block is driven to do upper and lower moving along column outer wall.
Above-mentioned valve, the outer wall of described top cover is connected with the inwall slidable sealing of described second cover body.
Above-mentioned valve, the thickness of the inner wall area that described second cover body can slide relative to described top cover outer wall is greater than the thickness of other inner wall area, is connected between two sections of different inner wall area by plane of inclination transition.
Above-mentioned valve, described in hold down assembly and comprise
Gland, is set on described valve rod, is positioned on the top of filler;
Pressing plate, is set on described valve rod, is closely pressed on described gland top;
Fixed block, for being fixed on described valve gap by described pressing plate.
Technical solution of the present invention, tool has the following advantages:
1. valve provided by the invention, on valve gap, sealing arranges the leakage situation evacuated housing for detecting filler, and at evacuated housing, or/and the valve gap be communicated with Seal cage offers leak detection mouth, Seal cage is formed between evacuated housing and valve gap, this Seal cage is by filler, hold down assembly sealing within it, when testing the leakage situation of filler, first on leak detection mouth, directly helium leak detector is installed, backward valve body in be full of the helium of master gage constant-pressure, vacuumized in Seal cage by helium leak detector again, until reach the negative pressure of regulation in Seal cage, if now helium leak detector detects in Seal cage helium sucking-off, and the sucking-off amount of helium exceeds the leakage rate scope that the qualified valve of different brackets tightness allows, or when negative pressure when vacuumizing in Seal cage does not reach the negative pressure of regulation always, show that the filler in valve has leakage, the sealability of valve does not reach the requirement of respective level valve, fall within the scope of the leakage rate of the qualified valve permission of different brackets tightness if helium leak detector detects in Seal cage without helium sucking-off or helium sucking-off amount, and the negative pressure kept relative stability in Seal cage, show the filler No leakage in valve, its sealability reaches the requirement of respective level valve.In addition, adopt the valve with evacuated housing when testing packing leaking situation, integrated testability can be carried out to the packing leaking situation of valve, avoid only testing the partial points around valve packing in prior art, reflect the sealability of valve on the whole exactly, level authentication is carried out to the sealability of valve.
2. valve provided by the invention, described evacuated housing comprises downward opening cover body, and cover body stuffing box gland is located on valve rod, and bottom opening density is fixed on valve gap, to form Seal cage.The valve of this structure, only evacuated housing need be set on valve gap, or/and the valve gap be communicated with Seal cage offers leak detection mouth on evacuated housing, just can be implemented in the leakage situation of line test valve packing, make the structure of whole valve simple, easily manufacturing and manufacture cost also relatively low.
3. valve provided by the invention, evacuated housing comprises and seals the first cover body of being fixed on valve gap, the first cover body opening up; Stuffing box gland is located at the top cover on valve rod; Opening towards the second cover body, the second cover body is sealedly connected on the outer wall of top cover; And by the fixing-assembly that described first cover body, the second cover body are sealedly and fixedly connected, to make to form described Seal cage between the first cover body, the second cover body, top cover and valve gap.Evacuated housing is arranged to two cover bodies, when facilitating the sealability of follow-up filler not reach corresponding requirements, can by opening fixed block, change moment of torsion that filler or increase hold down assembly to compress filler, and then the sealability of adjustment filler.
4. valve provided by the invention, also comprises limit assembly, to rotate in a circumferential direction motion, to make valve rod under external force, only in short transverse, doing upper and lower moving for limiting valve rod.Limit assembly drives flap to open mainly for relying on moving up and down of valve rod or closes the valve of the opening on valve seat, move up and down in process at valve rod, limit assembly can limit valve rod rotary motion trend in the horizontal direction, avoid valve rod to rotate in the horizontal direction and cause spraining of valve rod, make the motion only in the vertical direction of valve rod, improve the working life of valve rod.
5. valve provided by the invention, limit assembly comprises at least two columns, and two columns are directly fixed on valve gap; And directed block, directed block is fixedly connected on valve rod in the horizontal direction, and directed block has at least one end to be slidably connected on column, when valve rod does upper and lower motion, drives directed block to do upper and lower moving along column outer wall.Because valve gap is non-rotatably fixed on valve body, the column be directly fixed on valve gap also can not rotate motion in the horizontal direction, the stop directed block be slidably connected on column is done horizontal revolving motion, and then the valve rod that restriction is fixedly connected with positioning block rotates in the horizontal direction.
6. valve provided by the invention, described limit assembly comprises support, and the bottom of support is fixed on valve gap, and top is fixed on the bottom of top cover; Be fixedly connected on the column on top cover; And directed block, directed block substantially horizontal is fixedly connected on valve rod, has at least one end to be slidably connected on column; When valve rod does upper and lower motion, directed block is driven to do upper and lower moving along column outer wall.The column of the limit assembly of this structure, is fixed on valve gap by top cover, support, and the directed block make column, being slidably connected with column all moves in the horizontal direction without spin, and then valve rod is moved in the horizontal direction without spin.
7. valve provided by the invention, the outer wall of described top cover is connected with the inwall slidable sealing of the second cover body, when evacuated housing opened by needs, is moved up by the second cover body more easily and opens evacuated housing.
8. valve provided by the invention, the thickness of the inner wall area can slided relative to described top cover outer wall by the second cover body is greater than the thickness of other inner wall area, is connected between two sections of different inner wall area by plane of inclination transition.When the second cover body opened by needs, by the inner region upward sliding that the relative top cover outer wall of the second cover body can slide, the second cover body entirety can be moved up by its outward edge departing from top cover, more easily open the second cover body, change filler.
Accompanying drawing explanation
In order to be illustrated more clearly in the specific embodiment of the invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of a kind of valve that Fig. 1 provides for the present embodiment 1;
The structural representation of a kind of valve that Fig. 2 provides for the present embodiment 2;
Description of reference numerals: 1-valve body; 2-valve gap; 3-valve rod; 4-flap; 5-valve seat; 6-filler; 7-cover body; 8-first cover body; 9-second cover body; 10-hunts leak mouth; 11-first connecting base; 12-second connecting base; 13-link; 14-Sealing; 15-column; The directed block of 16-; 17-gland; 18-pressing plate; 19-fixed block; 20-top cover; 21-support.
Embodiment
Be clearly and completely described technological scheme of the present invention below in conjunction with accompanying drawing, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In describing the invention, it should be noted that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, " vertically ", " level ", " interior ", " outward " they be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
In addition, if below in the described different mode of execution of the present invention involved technical characteristics do not form conflict each other and just can be combined with each other.
Embodiment 1
The present embodiment provides a kind of valve, comprises
Valve body 1, has open top;
Valve gap 2, is sealedly connected on the top open part of described valve body 1;
Valve rod 3, valve gap 2 described in hermetically passing and to stretch into valve body 1 inner;
Flap 4, is connected to the bottom of valve rod 3 and is positioned at valve body 1 inside;
Valve seat 5, is arranged on valve body 1 inside and has opening;
Filler 6, sealing is arranged between described valve gap 2 and described valve rod 3 outer wall;
Hold down assembly, be set on described valve rod 3, for compressing described filler 6;
Described valve rod 3 can drive flap 4 to open or close opening on described valve seat 5 at the move under influence of external force; Also comprise
Evacuated housing, sealing is arranged on described valve gap 2, and form Seal cage with described valve gap 2, by described filler 6, holding down assembly is sealed in described Seal cage, on described evacuated housing, or/and the valve gap 2 be communicated with described Seal cage offers mouth 10 of hunting leak, for detecting the leakage situation of described filler 6.
Valve in above-mentioned mode of execution, on valve gap 2, sealing arranges the evacuated housing leaking situation for detecting filler 6, when testing the leakage situation of filler 6, first on leak detection mouth 10, directly helium leak detector is installed, backward valve body 1 in be full of the helium of master gage constant-pressure, by helium leak detector, Seal cage inside is vacuumized again, until reach the negative pressure of regulation in Seal cage, if now helium leak detector detects in Seal cage helium sucking-off, and the sucking-off amount of helium exceeds the leakage rate scope that the qualified valve of different brackets tightness allows, or when negative pressure when vacuumizing in Seal cage does not reach the negative pressure of regulation always, show that the filler 6 in valve has leakage, the sealability of valve does not reach the requirement of respective level valve, fall within the scope of the leakage rate of the qualified valve permission of different brackets tightness if helium leak detector detects in Seal cage without helium sucking-off or helium sucking-off amount, and the negative pressure kept relative stability in Seal cage, show filler 6 No leakage in valve, its sealability reaches the requirement of respective level valve.In addition, adopt the valve with evacuated housing when testing filler 6 and leaking situation, integrated testability can be carried out to filler 6 situation of leaking of valve, avoid only testing the partial points around valve packing in prior art, reflect the sealability of valve on the whole exactly, level authentication is carried out to the sealability of valve.
Preferably, as shown in Figure 1, evacuated housing comprises opening up first cover body 8, first cover body 8 sealing and is fixed on valve gap 2; Stuffing box gland is located at the top cover 20 on valve rod 3; Downward opening second cover body 9, second cover body 9 is sealedly connected on the outer wall of top cover 20; And by the fixing-assembly that the first cover body 8, second cover body 9 is sealedly and fixedly connected, to make to form Seal cage between the first cover body 8, second cover body 9, top cover 20 and valve gap 2 four.Two cover bodies are arranged to by evacuated housing by this structure valve, when facilitating the sealability of follow-up filler 6 not reach corresponding requirements, can by opening fixed block 19, change filler 6 or increase the moment of torsion that holds down assembly to compress filler 6, and then the sealability of adjustment filler 6.
For the first cover body 8, preferably the first cover body 8 is designed to tubular structure, bottom it, directly sealing is fixed on valve gap 2, such as, adopt welding manner, or other modes that are sealedly and fixedly connected in prior art; The profile of the first cover body 8 except being tubular structure, other shapes that it is square, heart-shaped that can also to be cross section be etc.In addition, the first cover body 8 can not also arrange bottom, only has the tubular structure that sidewall is formed, is directly weldingly fixed on valve gap 2 by tubular structure.For the structure of the second cover body 9, be preferably designed to tubular structure, or the structure of cover body conventional in other prior aries, as long as other shapes that the bottom opening of the second cover body 9 and the open-topped size of the first cover body 8 match are all passable.
As further preferred implementation, fixing-assembly preferably includes
First connecting base 11, the top being fixed on the first cover body 8 stretches out in the horizontal direction, has the first through hole;
Second connecting base 12, is fixed on upper bottom the second cover body 9 and stretches out in the horizontal direction, having the second through hole;
Link 13, is fixedly connected with the first connecting base 11 with the second connecting base 12 through the first through hole, the second through hole;
Sealing 14, is arranged on the surface of contact of the first connecting base 11 and the second connecting base 12, for sealing the gap between the first connecting base 11 and the second connecting base 12 surface of contact.
The fixing-assembly of this structure, is sealed by the surface of contact of Sealing 14 by two cover body connecting bases, does not have leakage phenomenon occur to make the Seal cage itself formed between the first cover body 8, second cover body 9, top cover 20 and valve gap 2 four.
Specifically, the first above-mentioned connecting base 11, second connecting base 12 preferably adopts flange, also can be connecting plate, connecting base or plate in prior art; Preferably adopting bolt, stud for link 13, also can be fixed block conventional in prior art; And O RunddichtringO is preferably adopted for Sealing 14, can also be sealer, gasket seal etc.
Preferably, above-mentioned holding down assembly comprises gland 17, is set on valve rod 3, is positioned on the top of filler 6; Pressing plate 18, is set on valve rod 3, is closely pressed on gland 17 top; And fixed block 19, for pressing plate 18 is fixed on valve gap 2.
As further preferred implementation, wherein, through hole offered by pressing plate 18, valve gap 2 arranges connecting plate, connecting plate is offered corresponding through hole, pressing plate 18, through the through hole on pressing plate 18, connecting plate, is fixed on valve gap 2 by fixed block 19.Fixed block 19 preferably adopts bolt and nut component or stud nut assembly, also can be conventional fixed connecting piece of the prior art.
As better mode of execution, the valve of present embodiment also comprises limit assembly, to rotate in a circumferential direction motion, to make valve rod 3 under external force, only moving up and down in short transverse for limiting valve rod 3.It should be noted that, limit assembly is mainly for the valve driving flap 4 to open or close the opening on valve seat 5 that moves up and down relying on valve rod 3, move up and down in process at valve rod 3, limit assembly can limit valve rod 3 rotary motion trend in the horizontal direction, avoid valve rod 3 to rotate in the horizontal direction and sprain valve rod 3, make the motion only in the vertical direction of valve rod 3, improve the working life of valve rod 3.
As preferred embodiment, limit assembly comprises support 21, is fixed on valve gap 2, and the short transverse along valve rod 3 extends, and is connected on the bottom of top cover 20; Be at least two columns 15, be fixedly connected on top cover 20; And directed block 16, be fixedly connected in the horizontal direction on valve rod 3, have at least one end to be slidably connected on column 15; When valve rod 3 moves up and down, directed block 16 is driven to move up and down along column 15 outer wall.The column 15 of the limit assembly of this structure, be fixed on valve gap 2 by top cover 20, support 21, because valve gap 2 is non-rotatably fixed on valve body 1, therefore, the support 21 be fixed on valve gap 2 also can not rotate in the horizontal direction, make fixing top cover 20, column 15 on the stent 21 and all can not have rotary motion in the horizontal direction with the directed block 16 that column 15 is slidably connected, and then the valve rod 3 be fixedly connected with directed block 16 made also moves in the horizontal direction without spin.
In above-mentioned limit assembly, specifically, the number of preferred column 15 is two, two column 15 symmetries are fixed on the both sides of top cover 20, correspondingly between two columns 15, be horizontally disposed with a directed block 16, one end of directed block 16 is slidably connected on a column 15, and meanwhile, the other end of directed block 16 is fixed on valve rod 3; Also can the two ends of directed block 16 be slidably connected on the outer wall of two columns 15 respectively, the centre of directed block 16 is fixed on valve rod 3.More specifically, directed block 16 is rectangle plate, circular hole is offered in the middle of plate, half-arc groove is offered at plate two ends, column 15 outer wall is directly stuck in the half-arc groove at rectangular slab two ends, and the middle circle borehole jack of directed block 16 is located on valve rod 3, and with fastening piece, such as pin, screw, be fixed on directed block 16 on valve rod 3.In addition, the number of column 15 can also be 3,4,5,6 etc., and the number of column 15 is preferably even number, is all symmetricly set on top cover 20, arbitrary to arranging one piece of directed block 16 between symmetrically arranged column 15.Also namely the number of column 15 is at least 2, and correspondingly the number of directed block 16 is at least one.
As further preferred implementation, the outer wall of top cover 20 is connected with the inwall slidable sealing of the second cover body 9.When evacuated housing opened by needs, the second cover body 9 is moved up open evacuated housing more easily.
As preferred forms, the thickness of the inner wall area that the second cover body 9 can slide relative to top cover 20 outer wall is greater than the thickness of other inner wall area, is connected between two sections of different inner wall area by plane of inclination transition.When the second cover body 9 opened by needs, by the inner wall area upward sliding that relative for the second cover body 9 top cover 20 outer wall can slide, make it depart from the outward edge of top cover 20, the second cover body 9 entirety can be moved up, more easily open the second cover body 9.
In addition, for the setting of leak detection mouth 10, can only arrange on the first cover body 8 or on the second cover body 9 or valve gap 2; Or leak detection mouth 10 is all set on the first cover body 8, second cover body 9; Or leak detection mouth 10 is all set on the first cover body 8, valve gap 2; Or the second cover body 9, valve gap 2 are all arranged leak detection mouth 10; Or leak detection mouth 10 is all set on the first cover body 8, second cover body 9, valve gap 2.
Embodiment 2
The present embodiment provides a kind of valve, as shown in Figure 2, compared with the valve provided with embodiment 1, the difference existed is: evacuated housing comprises downward opening cover body 7, cover body 7 stuffing box gland is located on valve rod 3, and bottom opening density is fixed on valve gap 2, to form Seal cage.
The valve of this structure, only cover body 7 need be set on valve gap 2, the valve gap 2 be communicated with Seal cage offers mouth 10 of hunting leak, just can be implemented in the leakage situation of line test valve packing 6, make the structure of whole valve simple, easily manufacturing and manufacture cost also relatively low.
When valve gap 2 is offered leak detection mouth 10, mainly on the valve gap 2 be connected with Seal cage, offer passage, Seal cage inside is in communication with the outside by this passage, the passway be connected with the external world is mouth 10 of hunting leak, when needing the leakage situation detecting filler 6, directly on leak detection mouth 10, helium leak detector is installed.In addition, also only can offer leak detection mouth 10 on cover body 7, on valve gap 2 and cover body 7, all can also offer leak detection mouth 10, carry out satisfied different client to the demand of valve.
As preferably, the limit assembly in present embodiment comprises at least two columns 15, two column 15 and is directly fixed on valve gap 2; Directed block 16, directed block 16 is fixedly connected on valve rod 3 in the horizontal direction, has at least one end to be slidably connected on column 15; When valve rod 3 moves up and down, directed block 16 is driven to move up and down along column 15 outer wall.Because valve gap 2 is non-rotatably fixed on valve body 1, the column 15 be directly fixed on valve gap 2 also can not rotate motion in the horizontal direction, column 15 will limit the rotary motion in the horizontal direction of directed block 16, and then the valve rod 3 that restriction is fixedly connected with directed block 16 rotates in the horizontal direction.
In present embodiment, the shape of column 15, directed block 16 and the number of setting respectively with the shape of the column 15 in embodiment 1, directed block 16, to arrange number all identical.
What deserves to be explained is: in above-mentioned two embodiments, if arrange limit assembly, then corresponding valve can be the valve moving up and down to realize valve opening or closedown that stop valve, gate valve, throttle valve etc. rely on valve rod 3; If do not arrange limit assembly, corresponding valve can be the valve moving up and down to realize valve opening or closedown that stop valve, gate valve, throttle valve etc. rely on valve rod 3; Can also be that ball valve, butterfly valve, rotoplug valve etc. rely on the rotary motion of valve rod 3 to realize the valve of valve opening or closedown.
Embodiment 3
The present embodiment provides a kind of valve, and compared with the valve provided with embodiment 1, the difference of existence is only: the second cover body 9 directly stuffing box gland is located on valve rod 3, without the need to arranging top cover 20 and limit assembly.Now, Seal cage is formed between the second cover body 8, first cover body 8 and valve gap 3 three.
Valve in the present embodiment can be the valve moving up and down to realize valve opening or closedown that stop valve, gate valve, throttle valve etc. rely on valve rod 3; Can also be that ball valve, butterfly valve, rotoplug valve etc. rely on the rotary motion of valve rod 3 to realize the valve of valve opening or closedown.
In addition, in above-mentioned three embodiments, when utilizing evacuated housing to detect the tightness of valve, leak detection mouth 10 connects helium leak detector, and its Placement preferentially adopts flange to connect.Except the air leakage detector that helium leak detector can also be other, such as nitrogen leak detector, neon leak detector, argon gas leak detector etc., as long as can detect while vacuumizing that other equipment of Leakage Gas can.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to mode of execution.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all mode of executions.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (10)
1. a valve, comprises
Valve body (1), has open top;
Valve gap (2), is sealedly connected on the top open part of described valve body (1);
Valve rod (3), valve gap described in hermetically passing (2) and to stretch into valve body (1) inner;
Flap (4), is connected to the bottom of valve rod (3) and is positioned at valve body (1) inside;
Valve seat (5), is arranged on valve body (1) inside and has opening;
Filler (6), sealing is arranged between described valve gap (2) and described valve rod (3) outer wall;
Hold down assembly, be set on described valve rod (3), for compressing described filler (6);
Described valve rod (3) can drive flap (4) to open or close opening on described valve seat (5) at the move under influence of external force;
It is characterized in that: also comprise
Evacuated housing, sealing is arranged on described valve gap (2), and form Seal cage with described valve gap (2), by described filler (6), holding down assembly is sealed in described Seal cage, on described evacuated housing, or/and the valve gap (2) be communicated with described Seal cage offers mouth (10) of hunting leak, for detecting the leakage situation of described filler (6).
2. valve according to claim 1, is characterized in that: described evacuated housing comprises
Cover body (7), opening down, stuffing box gland is located on described valve rod (3), and bottom opening sealing is fixed on described valve gap (2), to form described Seal cage.
3. valve according to claim 1, is characterized in that: described evacuated housing comprises
First cover body (8), sealing is fixed on valve gap (2), opening up;
Top cover (20), stuffing box gland is located on described valve rod (3);
Second cover body (9), is sealedly connected on the outer wall of described top cover (20), opening down;
Fixing-assembly, described first cover body (8), the second cover body (9) are sealedly and fixedly connected, to make to form described Seal cage between described first cover body (8), the second cover body (9), described top cover (20) and described valve gap (2) four.
4. valve according to claim 3, is characterized in that: described fixing-assembly comprises
First connecting base (11), the top being fixed on the first cover body (8) stretches out in the horizontal direction, has the first through hole;
Second connecting base (12), is fixed on the second cover body (9) bottom and also stretches out in the horizontal direction, have the second through hole;
Link (13), is fixedly connected with described first connecting base (11) with the second connecting base (12) through described first through hole, the second through hole;
Sealing (14), be arranged on described first connecting base (11) with on the surface of contact of the second connecting base (12), for sealing the gap between described first connecting base (11) and the second connecting base (12) surface of contact.
5. the valve according to any one of claim 1-4, it is characterized in that: also comprise limit assembly, to rotate in a circumferential direction motion for limiting valve rod (3), to make valve rod (3) under external force, only in short transverse, doing upper and lower moving.
6. valve according to claim 5, is characterized in that: described limit assembly comprises
Column (15), is at least two, is directly fixed on valve gap (2);
Directed block (16), is fixedly connected in the horizontal direction on valve rod (3), has at least one end to be slidably connected on column (15);
When valve rod (3) does upper and lower motion, directed block (16) is driven to do upper and lower motion along column (15) outer wall.
7. valve according to claim 5, is characterized in that: described limit assembly comprises
Support (21), is fixed on valve gap (2), and the short transverse along valve rod (3) extends, and is connected on the bottom of described top cover (20);
Column (15), is at least two, is fixedly connected on described top cover (20);
Directed block (16), is fixedly connected in the horizontal direction on valve rod (3), has at least one end to be slidably connected on column (15);
When valve rod (3) does upper and lower motion, directed block (16) is driven to do upper and lower motion along column (15) outer wall.
8. the valve according to any one of claim 3,4,5,7, is characterized in that: the outer wall of described top cover (20) is connected with the inwall slidable sealing of described second cover body (9).
9. valve according to claim 8, it is characterized in that: the thickness of the inner wall area that described second cover body (9) can be slided relative to described top cover (20) outer wall is greater than the thickness of other inner wall area, is connected between two sections of different inner wall area by plane of inclination transition.
10. the valve according to any one of claim 1-9, is characterized in that: described in hold down assembly and comprise
Gland (17), is set on described valve rod (3), is positioned on the top of filler (6);
Pressing plate (18), is set on described valve rod (3), is closely pressed on described gland (17) top;
Fixed block (19), for being fixed on described valve gap (2) by described pressing plate (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510600986.0A CN105179718B (en) | 2015-09-21 | 2015-09-21 | A kind of valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510600986.0A CN105179718B (en) | 2015-09-21 | 2015-09-21 | A kind of valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105179718A true CN105179718A (en) | 2015-12-23 |
| CN105179718B CN105179718B (en) | 2017-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510600986.0A Active CN105179718B (en) | 2015-09-21 | 2015-09-21 | A kind of valve |
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| Country | Link |
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| CN (1) | CN105179718B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043676A (en) * | 2019-04-26 | 2019-07-23 | 江苏圣泰阀门有限公司 | A kind of pressure seal parallel slide valve |
| CN112833244A (en) * | 2021-01-29 | 2021-05-25 | 河南工业贸易职业学院 | Electric power system based on computer control |
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| CN87210540U (en) * | 1987-09-11 | 1988-05-18 | 河南省开封市实验低温阀门厂 | Low temp. angle stop valve |
| EP0791814A2 (en) * | 1997-05-26 | 1997-08-27 | Martin Lehmann | Method for leak testing and leak testing apparatus |
| CN201166599Y (en) * | 2008-02-26 | 2008-12-17 | 上海电气电站设备有限公司 | Apparatus for detecting helium leakage of heat exchanger tube sheet weld joint |
| CN201583388U (en) * | 2009-11-27 | 2010-09-15 | 无锡市四方制桶有限公司 | Steel drum helium leakage detecting device |
| CN201828385U (en) * | 2010-06-12 | 2011-05-11 | 沈阳仪表科学研究院 | Helium mass spectrometer leak detection apparatus for multilayer metal corrugated pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210540U (en) * | 1987-09-11 | 1988-05-18 | 河南省开封市实验低温阀门厂 | Low temp. angle stop valve |
| EP0791814A2 (en) * | 1997-05-26 | 1997-08-27 | Martin Lehmann | Method for leak testing and leak testing apparatus |
| CN201166599Y (en) * | 2008-02-26 | 2008-12-17 | 上海电气电站设备有限公司 | Apparatus for detecting helium leakage of heat exchanger tube sheet weld joint |
| CN201583388U (en) * | 2009-11-27 | 2010-09-15 | 无锡市四方制桶有限公司 | Steel drum helium leakage detecting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110043676A (en) * | 2019-04-26 | 2019-07-23 | 江苏圣泰阀门有限公司 | A kind of pressure seal parallel slide valve |
| CN112833244A (en) * | 2021-01-29 | 2021-05-25 | 河南工业贸易职业学院 | Electric power system based on computer control |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105179718B (en) | 2017-09-12 |
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