CN203678065U - Suck-back preventing device for suction filtration in chemical laboratory - Google Patents
Suck-back preventing device for suction filtration in chemical laboratory Download PDFInfo
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- CN203678065U CN203678065U CN201420050399.XU CN201420050399U CN203678065U CN 203678065 U CN203678065 U CN 203678065U CN 201420050399 U CN201420050399 U CN 201420050399U CN 203678065 U CN203678065 U CN 203678065U
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- suck
- fluid communication
- communication pipe
- chamber
- suction filtration
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Abstract
The utility model discloses a suck-back preventing device for suction filtration in a chemical laboratory. The suck-back preventing device comprises a fluid conducting pipe, fixing plates and a suck-back preventing blocking ball, wherein the fluid conducting pipe is composed of an air inlet end, a suck-back preventing chamber and an air outlet end, wherein the pipe wall of the air inlet end of the fluid conducing pipe, close to the pipe opening, has two rectangular mounting holes, the inner diameter of the suck-back preventing chamber is grater than the inner diameters of the air inlet end of the fluid conducting pipe and the air outlet end of the fluid conducting pipe, the pipe wall of the suck-back preventing chamber has round mounting holes with diameters being greater than that of the suck-back preventing blocking ball, the pipe opening of the air outlet end of the fluid conducting pipe, in the suck-back preventing chamber, is provided with a strip-shaped positioning piece, the fixing plates are fixedly mounted in the rectangular mounting holes, and are connected with the suck-back preventing blocking ball through springs or rubber bands, and the suck-back preventing blocking ball is mounted in the suck-back preventing chamber. The suck-back preventing device can prevent water in a water circulating vacuum pump from being sucked into a suction flask or a surge flask, and is simple in structure and easy to process.
Description
Technical field
The utility model relates to a kind of suck-back device, particularly a kind of chemical laboratory suction filtration suck-back device.
Background technology
At present, chemical laboratory, in suction filtration process, is the suction filtration device that adopts bottle,suction, surge flask and water circulation vavuum pump to be formed by connecting by emulsion tube mostly, while carrying out suction filtration operation, first clamp emptying emulsion tube with haemostatic clamp, then open water circulation vacuum pump carries out suction filtration; In the time of suction filtration EO, first open emptying emulsion tube, then close water circulation vavuum pump.But indoor in chemical experiment, usually have the operate miss that some occur first closing water circulation vavuum pump and open emptying emulsion tube again in the time that suction filtration finishes, cause the water in water circulation vavuum pump to be entered in bottle,suction or surge flask by suck-back.
Utility model content
For the deficiencies in the prior art, the purpose of this utility model is to provide a kind of chemical laboratory suction filtration suck-back device.
The technical solution of the utility model is achieved in that a kind of chemical laboratory suction filtration suck-back device, comprises fluid communication pipe, fixed head and anti-suck obstruction ball; Described fluid communication pipe is made up of inlet end, anti-down suction-chamber and outlet side three parts; On the tube wall of described fluid communication pipe near-end near the mouth of pipe, offer two rectangle installing holes, two described rectangle installing holes are about the central shaft symmetry of fluid communication pipe, the height of described rectangle rectangular opening equals the thickness of described fixed head, and the width of described rectangle rectangular opening equals the width of described fixed head; The indoor footpath of described anti-suck is larger than the internal diameter of described fluid communication pipe inlet end and described fluid communication pipe outlet side, on anti-down suction-chamber tube wall, offers circular mounting hole; Described in described installing hole aperture ratio, anti-suck obstruction bulb diameter is large; Described fluid communication pipe outlet side is positioned on the indoor mouth of pipe edge of anti-suck and is provided with spacer along caliber direction, and described spacer can guarantee that described anti-suck obstruction ball can not stop up described fluid communication pipe outlet side in the time that vavuum pump suction is excessive; Described fixed head fixedly mounts in described rectangle installing hole, and described fixed head stops up ball with described anti-suck and is connected by spring or rubber band; It is indoor that described anti-suck obstruction ball is installed on described anti-suck.
Above-mentioned chemical laboratory suction filtration is with in suck-back device, and described fluid communication pipe is plastic tube or metal tube.
Above-mentioned chemical laboratory suction filtration is with in suck-back device, and on the above installing hole place outer wall of described anti-down suction-chamber, cover has sebific duct; The length of described sebific duct is greater than the aperture of described installing hole.
Above-mentioned chemical laboratory suction filtration is with in suck-back device, and described fixed head is bar shaped, and described fixed head width is less than the internal diameter of described fluid communication pipe inlet end, and the length of described fixed head is more than or equal to the external diameter of described fluid communication pipe inlet end.
Above-mentioned chemical laboratory suction filtration is with in suck-back device, the diameter of described anti-suck obstruction ball is less than the internal diameter of described anti-down suction-chamber, and be greater than the internal diameter of described fluid communication pipe inlet end, guarantee that described anti-suck obstruction ball can not entered described fluid communication pipe inlet end by suck-back.
Above-mentioned chemical laboratory suction filtration is with in suck-back device, and described anti-suck is stopped up ball for having flexible sphere, and the utility model preferentially adopts conventional material polyurethane or rubber to make described anti-suck and stops up ball.
The beneficial effects of the utility model are:
1. the water while using the utility model can avoid causing suction filtration to finish because of operate miss in water circulation vavuum pump is drawn in bottle,suction or surge flask, and then guarantees that laboratory sample can not polluted by the water in water circulation vavuum pump.
2. the utility model is simple in structure, reasonable in design, handling ease.
Accompanying drawing explanation
Fig. 1 the utility model chemical laboratory suction filtration suck-back device structural representation;
Fig. 2 the utility model chemical laboratory suction filtration uses suck-back device A-A to cross-sectional view;
Fig. 3 the utility model chemical laboratory suction filtration uses suck-back device B-B to cross-sectional view;
Fluid communication pipe outlet side structural representation described in suck-back device for Fig. 4 the utility model chemical laboratory suction filtration.
In figure: 1-fluid communication pipe, 2-fixed head, ball, 4-fluid communication pipe inlet end, the anti-down suction-chamber of 5-, 6-fluid communication pipe outlet side, 7-installing hole, 8-sebific duct, 9-spring or rubber band are stopped up in 3-anti-suck.
The specific embodiment
As shown in Fig. 1,2,3 and 4, a kind of chemical laboratory suction filtration suck-back device, comprises fluid communication pipe 1, fixed head 2 and anti-suck obstruction ball 3.Described fluid communication pipe 1 is made up of inlet end 4, anti-down suction-chamber 5 and outlet side 6 three parts, wherein, on the tube wall of described fluid communication pipe inlet end 4 near the mouth of pipe, offer two rectangle installing holes, two described rectangle installing holes are about the central shaft symmetry of described fluid communication pipe 1, the height of described rectangle installing hole equals the thickness of described fixed head 2, and the width of described rectangular opening equals the width of described fixed head 2; Described anti-down suction-chamber 5 internal diameters are larger than the internal diameter of described fluid communication pipe inlet end 4 and described fluid communication pipe outlet side 6; On described anti-down suction-chamber 5 tube walls, offer circular mounting hole 7, to stop up ball 3 diameters large in anti-suck described in described installing hole 7 aperture ratios; Described fluid communication pipe outlet side 6 is positioned on the mouth of pipe edge of anti-down suction-chamber 5 and is provided with spacer along caliber direction, and described spacer can guarantee that described anti-suck stops up ball 3 and in the time that vavuum pump suction is excessive, can not stop up described fluid communication pipe outlet side 6.Described fixed head 2 fixedly mounts in described rectangle installing hole, described fixed head 2 stops up ball with described anti-suck and is connected by spring or rubber band 9, it is shaped as bar shaped, its width is less than the internal diameter of described fluid communication pipe inlet end 4, and its length is more than or equal to the external diameter of described fluid communication pipe inlet end 4; Described anti-suck is stopped up ball 3 and is installed in described anti-down suction-chamber 5.
Due at indoor acidity or the alkaline solution of often can touching of chemical experiment; thereby require the material for making described fluid communication pipe 1 to there is good corrosion resistance; not only want acidproof also alkaline-resisting; sometimes also need oil resistant; preferentially select plastics so make the material of described fluid communication pipe 1, secondly can select metal tube.
While carrying out suction filtration, conventionally require suction filtration device to have certain air-tightness, so overlap one section of sebific duct 8 on the outer wall of described anti-down suction-chamber 5, the length of described sebific duct 8 is greater than the aperture of described installing hole 7, and the internal diameter under described sebific duct 8 natures is less than the external diameter of described anti-down suction-chamber 5, be greater than the external diameter of described fluid communication pipe outlet side 6, be convenient to like this handling of described sebific duct 8.
Water in water circulation vavuum pump is entered in bottle,suction or surge flask by suck-back, the diameter of described anti-suck obstruction ball 3 must be greater than the internal diameter of described fluid communication pipe inlet end 4, can guarantee that so described anti-suck obstruction ball 3 can not entered described fluid communication pipe inlet end 4 by suck-back, adopt polyurethane or rubber to make described anti-suck simultaneously and stop up ball 3, make described anti-suck stop up ball 3 and there is elasticity, after making on its edge, gas outlet that is pressed in described fluid communication pipe inlet end 4 when by suck-back, deform, then tightly block the gas outlet of described fluid communication pipe inlet end 4, avoid the water being entered in described anti-down suction-chamber 5 by suck-back to enter in bottle,suction or surge flask by the gap between described anti-suck obstruction ball 3 and described fluid communication pipe inlet end 4 gas outlets.
In the present embodiment, before suction filtration, first the utility model is assembled according to shown in Fig. 1 carrying out, then 6 gas outlets, described fluid communication pipe outlet side are connected with water circulation vavuum pump by emulsion tube and fluid communication; Then described fluid communication pipe inlet end 4 air inlets are connected with the gas outlet of bottle,suction or surge flask by emulsion tube and fluid communication; Then by remaining instrument and device according to the required assembling of chemical experiment.Suction filtration device assembling complete and check and determine that assembling sequence is errorless after, clamp emptying emulsion tube with haemostatic clamp, Buchner funnel is placed on bottle,suction, then test is poured in Buchner funnel with solution, open described water circulation vavuum pump.After suction filtration carries out a period of time, turn off described water circulation vavuum pump, then clamp with haemostatic clamp the emulsion tube that connects described fluid communication pipe outlet side 6 and described water circulation air-inlet of vacuum pump, then open the haemostatic clamp that clamps emptying emulsion tube, then move from described fluid communication pipe inlet end 4 with the emulsion tube of bottle,suction or surge flask gas outlet connecting described fluid communication pipe inlet end 4, at this moment can find does not have liquid in the pipe of described fluid communication pipe inlet end 4.This proves that the utility model can prevent that mistake is first turned off the suck-back that described water circulation vavuum pump causes after suction filtration finishes.
Above-described embodiment is only for the invention example is clearly described, and the not restriction to the invention specific embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.All any apparent variations of being extended out within the spirit and principles in the present invention or variation are still among the protection domain in the invention claim.
Claims (7)
1. a chemical laboratory suction filtration suck-back device, comprises fluid communication pipe (1), fixed head (2) and anti-suck obstruction ball (3); It is characterized in that, described fluid communication pipe (1) is made up of inlet end (4), anti-down suction-chamber (5) and outlet side (6) three parts; Described fluid communication pipe inlet end (4) offers two rectangle installing holes near on the tube wall of the mouth of pipe, two described rectangle installing holes are about the central shaft symmetry of described fluid communication pipe (1), the height of described rectangle installing hole equals the thickness of described fixed head, and the width of described rectangle installing hole equals the width of described fixed head (2); Described anti-down suction-chamber (5) internal diameter is larger than the internal diameter of described fluid communication pipe inlet end (4) and described fluid communication pipe outlet side (6), on described anti-down suction-chamber (5) tube wall, offers circular mounting hole (7); Described in described installing hole (7) aperture ratio, anti-suck obstruction ball (3) diameter is large; Described fluid communication pipe outlet side (6) is positioned at the spacer that is axially arranged with along pipe on the mouth of pipe edge of anti-down suction-chamber (5); Described fixed head (2) fixedly mounts in described rectangle installing hole, and described fixed head (2) stops up ball (3) with described anti-suck and is connected by spring or rubber band (9); Described anti-suck is stopped up ball (3) and is installed in described anti-down suction-chamber (5).
2. chemical laboratory suction filtration suck-back device according to claim 1, is characterized in that, described fluid communication pipe (1) is plastic tube or metal tube.
3. chemical laboratory suction filtration suck-back device according to claim 1, is characterized in that, the above installing hole of described anti-down suction-chamber (5) (7) is located cover on outer wall sebific duct (8); The length of described sebific duct (8) is greater than the aperture of described installing hole (7).
4. chemical laboratory suction filtration suck-back device according to claim 1, it is characterized in that, described fixed head (2) is bar shaped, described fixed head (2) width is less than the internal diameter of described fluid communication pipe inlet end (4), and the length of described fixed head (2) is more than or equal to the external diameter of described fluid communication pipe inlet end (4).
5. chemical laboratory suction filtration suck-back device according to claim 1, its feature is being, the diameter that ball (3) is stopped up in described anti-suck is less than the internal diameter of described anti-down suction-chamber (5), and is greater than the internal diameter of described fluid communication pipe inlet end (4).
6. according to the arbitrary described chemical laboratory suction filtration suck-back device of claim 1 or 5, it is characterized in that, described anti-suck is stopped up ball (3) for having flexible sphere.
7. chemical laboratory suction filtration suck-back device according to claim 6, is characterized in that, it is polyurethane or rubber bead processed that ball (3) is stopped up in described anti-suck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420050399.XU CN203678065U (en) | 2014-01-26 | 2014-01-26 | Suck-back preventing device for suction filtration in chemical laboratory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420050399.XU CN203678065U (en) | 2014-01-26 | 2014-01-26 | Suck-back preventing device for suction filtration in chemical laboratory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203678065U true CN203678065U (en) | 2014-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420050399.XU Expired - Fee Related CN203678065U (en) | 2014-01-26 | 2014-01-26 | Suck-back preventing device for suction filtration in chemical laboratory |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203678065U (en) |
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2014
- 2014-01-26 CN CN201420050399.XU patent/CN203678065U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20150126 |
|
| EXPY | Termination of patent right or utility model |