CN105257861A - Wedge-shaped valve rod diaphragm vacuum valve for pressure casting - Google Patents
Wedge-shaped valve rod diaphragm vacuum valve for pressure casting Download PDFInfo
- Publication number
- CN105257861A CN105257861A CN201510722841.8A CN201510722841A CN105257861A CN 105257861 A CN105257861 A CN 105257861A CN 201510722841 A CN201510722841 A CN 201510722841A CN 105257861 A CN105257861 A CN 105257861A
- Authority
- CN
- China
- Prior art keywords
- valve
- valve body
- barrier film
- valve rod
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
- F16K27/00—Construction of housing; Use of materials therefor
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
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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
- F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
- F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
- F16K7/14—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat
- F16K7/16—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat the diaphragm being mechanically actuated, e.g. by screw-spindle or cam
Abstract
The invention relates to the technical field of diaphragm cutoff devices and discloses a wedge-shaped valve rod diaphragm vacuum valve for pressure casting. The wedge-shaped valve rod diaphragm vacuum valve for pressure casting comprises a valve body, a diaphragm and a valve rod. The valve rod is sleeved with the valve body. The lower end of the valve rod is connected with the diaphragm. A valve element is arranged below the diaphragm. An air inlet and an air outlet are formed in the two sides of the valve element respectively and communicated with each other through a gap between the valve element and the diaphragm. An upright is arranged on the valve body and in threaded connection with a taper rod. A conic taper head is arranged at one end of the taper rod. A wedge-shaped curved face is arranged at the upper end of the valve rod and matched with the surface profile of the taper head. By the adoption of the scheme, a drive part is moved out of the valve body, the valve rod and the valve body slide normally, the surface is smooth, flying dust cannot be accumulated, washing is convenient, and meanwhile extra damage caused by the much flying dust to the valve rod and the valve body is prevented.
Description
Technical field
The present invention relates to barrier film shut-off means technical field.
Background technique
Vacuum die-casting method is extracted out by the gas in die cavity, and molten metal is filling die cavity under vacuum conditions, and the gas be thus involved in is few, and the mechanical property of foundry goods is high, and evacuated die casting is inherited and maintained the advantage of common die casting.Its degree of vacuum is at 52-82KPa(380-600mmHg) scope in, such degree of vacuum can be obtained by mechanical pump, can be higher for thin-walled and complicated die castings vacuum level requirements.Evacuated die casting has the following advantages: the pore of inside die-casting part can be eliminated or reduce to vacuum die-casting method, improves mechanical property and the surface quality of die castings, improves plating performance; Vacuum die-casting method greatly reduces the back pressure of die cavity, can use lower specific pressure and the poor alloy of castability, likely use the foundry goods that small machine die casting is larger; Vacuum die-casting method improves filling condition, can the thinner foundry goods of die casting; Vacuum die-casting method is compared with common pressure casting method, and manufacturing efficiency is about the same.
Evacuated die casting needs to reach required degree of vacuum in a short period of time, therefore forevacuum system must first be designed, wherein vacuum valve is an indispensable part in forevacuum system, it controls the sealing of whole device, control the extraction effect that this vacuumizes, indirectly control the quality of foundry goods.A kind of barrier film vacuum valve used at present, comprise valve rod, barrier film, handwheel, valve rod is connected with handwheel, slide bar is threaded on valve body, barrier film is positioned at immediately below valve rod and directly over spool, and rotation hand wheel band ovable valve stem rotates and moves down, valve rod presses against diaphragm, make barrier film and the laminating of spool precision, cut off suction port and air outlet realization closedown.But, the working environment of die casting is general all more severe, there is a lot of dust, adopt this structure, vacuum valve is in long-term using process, be divided into and easily enter in valve body, dust accumulation goes out at thread pitch, not easy-clear, and dust can hurt valve rod and body cavity, accelerate part aging, part durability is reduced.
Summary of the invention
The invention is intended to provide one to avoid dust to pile up in valve body, easily the die casting wedge shape valve rod barrier film vacuum valve of cleaning valve inner, to improve the durability of vacuum valve.
Die casting in this programme wedge shape valve rod barrier film vacuum valve, comprise valve body, barrier film, valve rod, be placed in described valve rod in valve body, valve rod lower end connects barrier film, spool is provided with below barrier film, the both sides of described spool is respectively equipped with suction port and air outlet, gap is left between spool and barrier film, suction port is connected by this gap with air outlet, described valve body is provided with column, and column has been threaded cone bar, and one end of described tapered rod is provided with conical conehead, valve rod upper end is arc-shaped curved surface, and the surface profile of this arc-shaped curved surface and conehead adapts.
Beneficial effect: valve rod is propped up under its own resilient effect of barrier film, and the conehead of boring on bar does not enforce valve rod, and leave space between barrier film and spool, suction port is communicated with air outlet, and valve body is in opening state; Rotating cone bar, makes cone bar move to the screw thread feeding of valve rod direction, due to the setting of wedge shape end face on valve rod, cone bar can promote valve rod slide downward, thus presses down barrier film, is that barrier film deforms, fit tightly with spool, cut off suction port and air outlet, reached closed condition; Counterrotating cone bar, then realize breakdown action.Adopt the program, drive part has been moved on to valve body outside, valve rod and valve body are common slip, and smooth surface can not pile up flying dust, are convenient to cleaning, also prevent the excessive wear that the many valve rods of flying dust and valve body cause simultaneously.
Further, connected by a sleeve pipe between described valve body and barrier film, the bottom of valve body and the top of barrier film are all placed in sleeve pipe, and carry out spacing with convex shoulder, valve rod and barrier film are connected big one, avoids valve rod and barrier film to misplace, sealing effect is bad, adopt convex shoulder to carry out limit mounting simultaneously, easy for installation, be also convenient to dismounting.
Further, described valve body comprises upper valve body and lower valve body, the edge of barrier film is sandwiched between upper valve body and lower valve body, upper valve body and lower valve body adopt bolt to be connected, and valve body is split as upper and lower valve body, are convenient to manufacture and install, also be convenient to the replacing of part simultaneously, the edge of barrier film is clamped by upper and lower valve body, avoids barrier film to misplace, and improves the reliability of this vacuum valve further.
Further, the suction port on described valve body and air outlet and external pipe adopt Flange joint, and Flange joint can ensure good tightness.
Further, described cone bar is provided with handwheel away from one end of conehead, and handwheel is provided with handle, facilitates staff to hold, and can fast and convenient rotating cone bar.
Accompanying drawing explanation
Fig. 1 is the structural representation of die casting wedge shape valve rod barrier film vacuum valve embodiment of the present invention.
Embodiment
Below by embodiment, the present invention is further detailed explanation:
Reference character in Figure of description comprises: lower valve body 1, spool 11, suction port 12, air outlet 13, upper valve body 2, valve rod 21, barrier film 3, cone bar 4, conehead 41, handwheel 42, handle 421, column 5.
Embodiment is substantially as shown in Figure 1:
Die casting in this programme wedge shape valve rod barrier film vacuum valve, comprise valve body, barrier film 3, valve rod 21, be placed in valve rod 21 in valve body, valve rod 21 lower end connects barrier film 3, it is spool 11 below barrier film 3, spool 11 and lower valve body 1 are formed in one, and the both sides of spool 11 has suction port 12 and air outlet 13, and suction port 12 and air outlet 13 are connected by the gap between spool 11 and barrier film 3.
Valve body is welded with column 5, column 5 has been threaded cone bar 4, and one end of this cone bar 4 is welded with conical conehead 41, and valve rod 21 upper end is wedge shape curved surface, the surface profile of this curved surface and conehead 41 adapts, and the moving axially of conehead 41 can promote valve rod 21 and slide.
Connected by a sleeve pipe between valve body and barrier film 3, the bottom of valve body and the top of barrier film 3 are all placed in sleeve pipe, and carry out spacing with convex shoulder, valve rod 21 and barrier film 3 are connected as a single entity, avoid valve rod 21 and barrier film 3 to misplace, sealing effect is bad, adopts convex shoulder to carry out limit mounting simultaneously, easy for installation, be also convenient to dismounting.The edge of barrier film 3 is sandwiched between upper valve body 2 and lower valve body 1, upper valve body 2 adopts bolt to be connected with lower valve body 1, valve body is split as upper and lower valve body 1, be convenient to manufacture and install, also be convenient to the replacing of part simultaneously, the edge of barrier film 3 is clamped by upper and lower valve body 1, avoids barrier film 3 to misplace, and improves the reliability of this vacuum valve further.
Suction port 12 on valve body and air outlet 13 and external pipe adopt Flange joint, and Flange joint can ensure good tightness.Cone bar 41 is provided with handwheel 42 away from one end of conehead 41, and handwheel 42 is provided with handle 421, and the described personnel of convenience hold, and can fast and convenient rotating cone bar 4.
Working principle: valve rod 21 is propped up under its own resilient effect of barrier film 3, and the conehead 41 of boring on bar 41 does not enforce valve rod 21, and leave space between barrier film 3 and spool 11, suction port 12 is communicated with air outlet 13, and valve body is in opening state; Rotation hand wheel 42 is rotating cone bar 41 indirectly, cone bar 41 is moved to the screw thread feeding of valve rod 21 direction, due to the setting of wedge shape end face on valve rod 21, cone bar 41 can promote valve rod 21 slide downward, thus press down barrier film 3, be that barrier film 3 deforms, and spool 11 fit tightly, cut off suction port 12 and air outlet 13, reach closed condition; Counterrotating cone bar 41, then realize breakdown action.
Above-described is only embodiments of the invention, and in scheme, the general knowledge such as known concrete structure and characteristic does not do too much description at this.Should be understood that; for a person skilled in the art, under the prerequisite not departing from structure of the present invention, some distortion and improvement can also be made; these also should be considered as protection scope of the present invention, and these all can not affect effect of the invention process and practical applicability.The protection domain that this application claims should be as the criterion with the content of its claim, and the embodiment in specification etc. record the content that may be used for explaining claim.
Claims (5)
1. a die casting wedge shape valve rod barrier film vacuum valve, comprise valve body, barrier film, valve rod, be placed in described valve rod in valve body, valve rod lower end connects barrier film, spool is provided with below barrier film, the both sides of described spool is respectively equipped with suction port and air outlet, gap is left between spool and barrier film, suction port is connected by this gap with air outlet, it is characterized in that: described valve body is provided with column, column has been threaded cone bar, and one end of described tapered rod is provided with conical conehead, valve rod upper end is arc-shaped curved surface, and the surface profile of this arc-shaped curved surface and conehead adapts.
2. die casting wedge shape valve rod barrier film vacuum valve according to claim 1, is characterized in that: connected by a sleeve pipe between described valve body and barrier film, the bottom of valve body and the top of barrier film are all placed in sleeve pipe, and carry out spacing with convex shoulder.
3. die casting wedge shape valve rod barrier film vacuum valve according to claim 2, is characterized in that: described valve body comprises upper valve body and lower valve body, and the edge of barrier film is sandwiched between upper valve body and lower valve body, and upper valve body and lower valve body adopt bolt to be connected.
4. die casting wedge shape valve rod barrier film vacuum valve according to claim 3, is characterized in that: the suction port on described valve body and air outlet and external pipe adopt Flange joint.
5. die casting wedge shape valve rod barrier film vacuum valve according to claim 4, is characterized in that: described cone bar is provided with handwheel away from one end of conehead, and handwheel is provided with handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510722841.8A CN105257861A (en) | 2015-10-29 | 2015-10-29 | Wedge-shaped valve rod diaphragm vacuum valve for pressure casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510722841.8A CN105257861A (en) | 2015-10-29 | 2015-10-29 | Wedge-shaped valve rod diaphragm vacuum valve for pressure casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105257861A true CN105257861A (en) | 2016-01-20 |
Family
ID=55097689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510722841.8A Pending CN105257861A (en) | 2015-10-29 | 2015-10-29 | Wedge-shaped valve rod diaphragm vacuum valve for pressure casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105257861A (en) |
-
2015
- 2015-10-29 CN CN201510722841.8A patent/CN105257861A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160120 |