CN205173672U - Cam diaphragm vacuum valve for die -casting - Google Patents
Cam diaphragm vacuum valve for die -casting Download PDFInfo
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- CN205173672U CN205173672U CN201520854885.1U CN201520854885U CN205173672U CN 205173672 U CN205173672 U CN 205173672U CN 201520854885 U CN201520854885 U CN 201520854885U CN 205173672 U CN205173672 U CN 205173672U
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- barrier film
- valve body
- cam
- valve rod
- valve
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Abstract
The utility model relates to a diaphragm cutting device technical field discloses a cam diaphragm vacuum valve for die -casting, including valve body, diaphragm, valve rod, the valve rod endotheca is in the valve body, and the diaphragm is connected to the valve rod lower extreme, is equipped with the case below the diaphragm, the both sides of case is equipped with air inlet and gas outlet respectively, and air inlet and the gas outlet clearance between through case and diaphragm is linked together, the upper end of valve rod articulates there is the pulley, and the pulley top is equipped with the cam and cooperates with it, is equipped with the handle on the cam. Adopting above -mentioned scheme, pushing down with the cam rotation and replaced the screw rod rotation to push down, open and close quicker, the reflection is quick, and it is more convenient to control, has effectively improved the efficiency of die -casting.
Description
Technical field
The utility model 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 adopt screw thread rotation to carry out the folding of valve body, the stroke of screw thread is comparatively large, and folding speed is slow, is not easy to the quick opening and closing of vacuum valve.
Model utility content
The utility model is intended to the die casting cam barrier film vacuum valve providing a kind of quick opening and closing.
Die casting in this programme cam 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, and be provided with spool below barrier film, the both sides of described spool is respectively equipped with suction port and air outlet, suction port and air outlet are connected by the gap between spool and barrier film, the upper end thereof of described valve rod has pulley, and be provided with the cam coordinated with this pulley above pulley, cam is provided with handle.
Beneficial effect: one end of cam path length and pulley laminating, valve rod is propped up under its own resilient effect of barrier film, and leave space between barrier film and spool, suction port is communicated with air outlet, and valve body is in opening state; Swing handle, rotating cam, the side's angle pulley grown up in cam footpath, cam promotes valve rod and moves down, thus presses down barrier film, is that barrier film deforms, fit tightly with spool, cut off suction port and air outlet, reached closed condition, when most major diameter long end and the pulley laminating of cam, the reaction force direction of valve rod is just by the rotating center of cam, the moment that cam can not be rotated, so realize self-locking, makes closed condition be maintained.Adopt such scheme, instead of screw rod rotating down pressing with cam rotating down pressing, open and close more quick, reflection is quick, and it is more convenient to control, and effectively improves the efficiency of die casting.
Further, connected by sleeve pipe between described valve body and barrier film, the bottom of valve rod and the top of barrier film are all positioned at sleeve pipe, and sleeve pipe is provided with for valve rod and the spacing convex shoulder of barrier film.Valve rod and barrier film are connected big one, and avoid valve rod and barrier film to misplace, sealing effect is bad, adopts convex shoulder to carry out limit mounting simultaneously, easy for installation, is 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 the outside of air outlet are provided with flange plate, and Flange joint can ensure good tightness.
Further, described valve rod is provided with supporting frame, and supporting frame is provided with cross bar, and pulley is hinged on cross bar, and this structure is more even to the support of pulley, and the stress avoiding valve stem tip is too concentrated.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model die casting cam barrier film vacuum valve embodiment.
Embodiment
Below by embodiment, the utility model is described in further detail:
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, supporting frame 211, pulley 212, barrier film 3, cam 4, handle 41.
Embodiment is substantially as shown in Figure 1:
Die casting in this programme cam barrier film vacuum valve, comprise barrier film 3, valve rod 21, be placed in upper valve body 2 in valve rod 21, valve rod 21 lower end connects barrier film 3, it is spool 11 below barrier film 3, just Construction integration is shaping year for spool 11 and lower valve body 1, and the both sides of spool 11 is respectively equipped with 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.
The upper end of valve rod 21 is welded with one piece of dunnage, dunnage has supporting frame 211, supporting frame 211 has a cross bar, cross bar is hinged with pulley 212, and be provided with cam 4 above pulley 212 and coordinate with it, cam 4 is provided with handle 41.
Connected by a sleeve pipe between valve rod 21 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 big one, 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.
Working principle: cam 4 footpath long end and pulley 212 are fitted, valve rod 21 is propped up under its own resilient effect of barrier film 3, leaves space between barrier film 3 and spool 11, and suction port 12 is communicated with air outlet 13, and valve body is in opening state; Swing handle 41, rotating cam 4, the side's angle pulley 212 grown up in cam 4 footpath, cam 4 promotes valve rod 21 and moves down, thus presses down barrier film 3, is that barrier film 3 deforms, fit tightly with spool 11, cut off suction port 12 and air outlet 13, reached closed condition, when the most major diameter long end of cam 4 and pulley 212 are fitted, the reaction force direction of valve rod 21 is just by the rotating center of cam 4, the moment that cam 4 can not be rotated, so realize self-locking, is that closed condition is maintained.
Above-described is only embodiment of the present utility model, 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 the utility model structure, some distortion and improvement can also be made; these also should be considered as protection domain of the present utility model, and these all can not affect effect and the practical applicability of the utility model enforcement.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 cam 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, and be provided with spool below barrier film, the both sides of described spool is respectively equipped with suction port and air outlet, suction port and air outlet are connected by the gap between spool and barrier film, it is characterized in that: the upper end thereof of described valve rod has pulley, be provided with the cam coordinated with this pulley above pulley, cam is provided with handle.
2. die casting cam barrier film vacuum valve according to claim 1, it is characterized in that: connected by a sleeve pipe between described valve body and barrier film, the bottom of valve rod and the top of barrier film are all positioned at sleeve pipe, and sleeve pipe is provided with for valve rod and the spacing convex shoulder of barrier film.
3. die casting cam barrier film vacuum valve according to claim 2, is characterized in that: 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, and upper valve body and lower valve body adopt bolt to be connected.
4. die casting cam barrier film vacuum valve according to claim 3, is characterized in that: the suction port on described valve body and the outside of air outlet are provided with flange plate.
5. die casting cam barrier film vacuum valve according to claim 4, is characterized in that: described valve rod is provided with supporting frame, and supporting frame is provided with cross bar, and pulley is hinged on cross bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520854885.1U CN205173672U (en) | 2015-10-29 | 2015-10-29 | Cam diaphragm vacuum valve for die -casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520854885.1U CN205173672U (en) | 2015-10-29 | 2015-10-29 | Cam diaphragm vacuum valve for die -casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205173672U true CN205173672U (en) | 2016-04-20 |
Family
ID=55737666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520854885.1U Active CN205173672U (en) | 2015-10-29 | 2015-10-29 | Cam diaphragm vacuum valve for die -casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205173672U (en) |
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2015
- 2015-10-29 CN CN201520854885.1U patent/CN205173672U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |