CN214374139U - Intelligent molding sand air permeability tester - Google Patents
Intelligent molding sand air permeability tester Download PDFInfo
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- CN214374139U CN214374139U CN202120120239.8U CN202120120239U CN214374139U CN 214374139 U CN214374139 U CN 214374139U CN 202120120239 U CN202120120239 U CN 202120120239U CN 214374139 U CN214374139 U CN 214374139U
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Abstract
The utility model discloses an intelligent sand air permeability tester, which comprises an exhaust mechanism, a testing mechanism and a connecting mechanism, wherein the exhaust mechanism comprises a water storage barrel, an air cylinder and an air duct, wherein the air cylinder and the air duct are reversely buckled on the liquid level in the water storage barrel; the testing mechanism comprises a testing sleeve for filling the molding sand sample, a rubber sleeve and an inflating piece, wherein the inflating piece is used for inflating the inflating cavity to keep the sealing between the molding sand sample and the inner wall of the testing sleeve; the connecting mechanism comprises a connecting pipe and an air valve, one end of the connecting pipe is communicated with the other end of the air guide pipe, and the other end of the connecting pipe is communicated with one end of the testing sleeve. The utility model provides a technical scheme's beneficial effect is: establish a rubber sleeve through inlaying between test sleeve and molding sand sample to make rubber sleeve aerify the inflation through aerifing the piece, thereby make and keep sealed between test sleeve and the molding sand sample, prevent that gas from discharging in the clearance between test sleeve and the molding sand sample, improved the accuracy of testing result.
Description
Technical Field
The utility model belongs to the technical field of the molding sand testing arrangement technique and specifically relates to a smart molding sand gas permeability tester is related to.
Background
The molding sand is generally prepared by mixing molding materials such as raw sand for casting, a molding sand binder, auxiliary additives and the like according to a certain proportion. In production and research, it is often necessary to test the air permeability of the molding sand.
The basic principle of the molding sand air permeability testing device is that a molding sand sample is embedded in a testing sleeve, and under the condition of constant pressure, the air permeability of a sample is determined by measuring the pressure difference and the time generated by the molding sand sample in the testing sleeve by using gas with a certain volume and a certain flow rate.
The existing molding sand air permeability testing device has gaps between a molding sand sample and a testing sleeve, and gas can be discharged from the gaps, so that the measured ventilation degree result is inaccurate.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide an intelligent sand air permeability tester, which is used to solve the technical problem of poor accuracy of test results caused by poor sealing between a sand sample and a test sleeve in the conventional sand air permeability testing device.
An intelligent molding sand gas permeability tester, comprising:
the exhaust mechanism comprises a water storage cylinder for containing liquid, an air cylinder and an air guide pipe, wherein the air cylinder is used for being buckled on the liquid level in the water storage cylinder in an inverted mode, and one end of the air guide pipe is located above the liquid level in the water storage cylinder and is communicated with the air cylinder;
the testing mechanism comprises a testing sleeve for filling a molding sand sample, a rubber sleeve and an inflating piece, the rubber sleeve is annular and is provided with a closed inflating cavity, the rubber sleeve is arranged in the testing sleeve and sleeved on the molding sand sample, and the inflating piece is communicated with the inflating cavity and is used for inflating the inflating cavity so as to keep the sealing between the molding sand sample and the inner wall of the testing sleeve;
the connecting mechanism comprises a connecting pipe and an air valve, one end of the connecting pipe is communicated with the other end of the air guide pipe, the other end of the connecting pipe is communicated with one end of the testing sleeve, and the air valve is arranged on the connecting pipe and used for controlling the on-off of the connecting pipe.
Furthermore, the air duct is fixed on the inner bottom wall of the water storage barrel and is vertically arranged; the exhaust mechanism further comprises a guide rod, and the guide rod is fixed on the inner bottom wall of the inflator and is used for being inserted into the air guide pipe.
Further, be provided with the spacing arch of a plurality of along circumference on the lateral wall of inflator, spacing arch be used for with the inside wall butt of water storage section of thick bamboo.
Further, a handle is fixedly arranged on the inflator.
Furthermore, the inflation piece comprises an inflation ball, an inflation tube and a one-way valve, the inflation ball is provided with an inflation cavity, the two ends of the inflation ball are respectively provided with a first vent hole and a second vent hole communicated with the inflation cavity, the two ends of the inflation tube are respectively communicated with the first vent hole and the inflation cavity, and the one-way valve is arranged on the inflation tube.
Further, coupling mechanism still includes the pressure gauge, the pressure gauge with the connecting pipe intercommunication just is used for acquireing the atmospheric pressure in the connecting pipe.
Compared with the prior art, the utility model provides a technical scheme's beneficial effect is: establish a rubber sleeve through inlaying between test sleeve and molding sand sample to make rubber sleeve aerify the inflation through aerifing the piece, thereby make and keep sealed between test sleeve and the molding sand sample, prevent that gas from discharging in the clearance between test sleeve and the molding sand sample, improved the accuracy of testing result.
Drawings
Fig. 1 is a front view of an embodiment of the intelligent sand air permeability tester provided by the present invention;
fig. 2 is a perspective view of the intelligent sand air permeability tester in fig. 1 (with the connection mechanism and the air-filled member omitted);
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a cross-sectional view taken along section A-A of FIG. 3;
in the figure: 1-exhaust mechanism, 2-test mechanism, 3-connecting mechanism, 11-water storage cylinder, 12-air cylinder, 121-limit protrusion, 122-handle, 13-air duct, 14-guide rod, 21-test sleeve, 22-rubber sleeve, 23-inflation piece, 231-balloon, 2311-first air vent, 2312-second air vent, 232-inflation tube, 233-one-way valve, 31-connecting tube, 32-air valve and 33-pressure meter.
Detailed Description
The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.
Referring to fig. 1-4, the present invention provides an intelligent sand air permeability tester, which includes an exhaust mechanism 1, a testing mechanism 2 and a connecting mechanism 3.
Referring to fig. 4, the exhaust mechanism 1 is used for exhausting a certain amount of gas, the exhaust mechanism 1 includes a water storage tank 11 for containing liquid, an air cylinder 12 for reversely buckling on the liquid level in the water storage tank 11, and an air duct 13, and one end of the air duct 13 is located above the liquid level in the water storage tank 11 and is communicated with the air cylinder 12.
Referring to fig. 2 and 4, the testing mechanism 2 includes a testing sleeve 21 for containing a molding sand sample, a rubber sleeve 22 and an inflating member 23, the testing sleeve 21 is made of stainless steel to ensure a large mass, the molding sand sample is cylindrical and is adapted to the size of the testing sleeve 21, the rubber sleeve 22 is annular and has a closed inflating cavity, the rubber sleeve 22 is arranged in the testing sleeve 21 and is sleeved on the molding sand sample, and the inflating member 23 is communicated with the inflating cavity and is used for inflating the inflating cavity to keep a seal between the molding sand sample and the inner wall of the testing sleeve 21.
Referring to fig. 1 and 4, the connection mechanism 3 includes a connection pipe 31 and an air valve 32, one end of the connection pipe 31 is communicated with the other end of the air duct 13, the other end of the connection pipe 31 is communicated with one end of the testing sleeve 21, and the air valve 32 is disposed on the connection pipe 31 and is used for controlling on/off of the connection pipe 31.
Preferably, referring to fig. 4, the air duct 13 is fixed on the inner bottom wall of the water storage tank 11 and is vertically arranged. Exhaust mechanism 1 still includes guide arm 14, guide arm 14 is fixed in on the interior diapire of inflator 12 and be used for inserting and locate in the air duct 13, the diameter of guide arm 14 should slightly be less than the internal diameter of air duct 13 to guide arm 14 can not block up the air duct 13 completely, guarantees that gas can pass through in the clearance of guide arm 14 and air duct 13, and when using, inflator 12 descends under the action of gravity, thereby drives guide arm 14 and removes in air duct 13, and spacing through guide arm 14 makes inflator 12 can not take place to shift by a wide margin on horizontal, guarantees test process's stability.
Preferably, referring to fig. 4, a plurality of limiting protrusions 121 are circumferentially disposed on an outer side wall of the air cylinder 12, and the limiting protrusions 121 are used for abutting against an inner side wall of the water storage cylinder 11. The limiting protrusion 121 also prevents the air cylinder 12 from greatly displacing in the transverse direction, thereby ensuring the stability of the testing process.
Preferably, referring to fig. 4, a handle 122 is fixedly mounted on the gas cylinder 12 to facilitate the extraction of the gas cylinder 12 from the water after the test is finished.
Specifically, referring to fig. 1 and 4, the inflating member 23 includes an inflating ball 231, an inflating tube 232 and a check valve 233, the inflating ball 231 has an inflating cavity, two ends of the inflating ball 231 are respectively provided with a first vent 2311 and a second vent 2312 which are communicated with the inflating cavity, two ends of the inflating tube 232 are respectively communicated with the first vent 2311 and the inflating cavity, the check valve 233 is disposed on the inflating tube 232, and the check valve 233 is used for preventing the gas in the rubber sleeve 22 from flowing backwards.
Specifically, referring to fig. 1 and 4, the connection mechanism 3 further includes a pressure gauge 33, and the pressure gauge 33 is communicated with the connection pipe 31 and is used for acquiring the air pressure in the connection pipe 31.
For better understanding of the present invention, the following will be described in detail with reference to fig. 1 to 4, in order to provide an intelligent sand air permeability tester, the working process of which is as follows: when in use, the air cylinder 12 is lifted upwards firstly, the air cylinder 12 is enabled to leave the water surface in the water storage cylinder 11, the air valve 32 is closed when the air cylinder 12 is filled with air, then the air cylinder 12 is released, and the air cylinder 12 is reversely buckled into the water under the action of the self gravity and is kept still; then, the sand sample is loaded into the test sleeve 21, the second vent 2312 of the balloon 231 is pinched again, the balloon 231 is squeezed, the gas in the balloon 231 enters the rubber sleeve 22 through the inflation tube 232, so that the rubber sleeve 22 is expanded, the sealing between the sand sample and the inner wall of the test sleeve 21 is kept, then, the gas valve 32 is opened, the gas in the gas cylinder 12 enters the test sleeve 21 through the gas guide tube 13 and the connecting tube 31 and is discharged to the atmosphere from the pores of the sand sample, the gas cylinder 12 is gradually lowered along with the continuous discharge of the gas, when the gas cylinder 12 is lowered to the bottom, the test is finished, the pressure difference and the time generated by the recording gas passing through the sand sample in the test sleeve 21 are used for determining the ventilation degree of the sample, and the starting time and the ending time can be determined by the value change of the pressure gauge 33.
To sum up, the utility model discloses an inlay between test sleeve 21 and molding sand sample and establish a rubber sleeve 22 to make rubber sleeve 22 aerify the inflation through inflatable member 23, thereby make and keep sealed between test sleeve 21 and the molding sand sample, prevent that gas from discharging in the clearance between test sleeve 21 and the molding sand sample, improved the accuracy of testing result.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention.
Claims (6)
1. The utility model provides an intelligence molding sand gas permeability tester which characterized in that includes:
the exhaust mechanism comprises a water storage cylinder for containing liquid, an air cylinder and an air guide pipe, wherein the air cylinder is used for being buckled on the liquid level in the water storage cylinder in an inverted mode, and one end of the air guide pipe is located above the liquid level in the water storage cylinder and is communicated with the air cylinder;
the testing mechanism comprises a testing sleeve for filling a molding sand sample, a rubber sleeve and an inflating piece, the rubber sleeve is annular and is provided with a closed inflating cavity, the rubber sleeve is arranged in the testing sleeve and sleeved on the molding sand sample, and the inflating piece is communicated with the inflating cavity and is used for inflating the inflating cavity so as to keep the sealing between the molding sand sample and the inner wall of the testing sleeve;
the connecting mechanism comprises a connecting pipe and an air valve, one end of the connecting pipe is communicated with the other end of the air guide pipe, the other end of the connecting pipe is communicated with one end of the testing sleeve, and the air valve is arranged on the connecting pipe and used for controlling the on-off of the connecting pipe.
2. The intelligent sand air permeability tester as claimed in claim 1, wherein the air duct is fixed on the inner bottom wall of the water storage tank and is vertically arranged;
the exhaust mechanism further comprises a guide rod, and the guide rod is fixed on the inner bottom wall of the inflator and is used for being inserted into the air guide pipe.
3. The intelligent sand air permeability tester as claimed in claim 1, wherein the outer side wall of the air cylinder is provided with a plurality of limiting protrusions along the circumferential direction, and the limiting protrusions are used for being abutted against the inner side wall of the water storage cylinder.
4. The intelligent sand air permeability tester as claimed in claim 1, wherein a handle is fixedly mounted on the inflator.
5. The intelligent sand air permeability tester as claimed in claim 1, wherein the inflation member comprises an air inflation chamber, an inflation tube and a one-way valve, the air inflation chamber has an air inflation chamber, the two ends of the air inflation chamber are respectively provided with a first vent hole and a second vent hole which are communicated with the air inflation chamber, the two ends of the inflation tube are respectively communicated with the first vent hole and the inflation chamber, and the one-way valve is arranged on the inflation tube.
6. The intelligent sand air permeability tester as claimed in claim 1, wherein the connection mechanism further comprises a pressure gauge which is in communication with the connection pipe and is used to obtain the air pressure in the connection pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120120239.8U CN214374139U (en) | 2021-01-15 | 2021-01-15 | Intelligent molding sand air permeability tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120120239.8U CN214374139U (en) | 2021-01-15 | 2021-01-15 | Intelligent molding sand air permeability tester |
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| Publication Number | Publication Date |
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| CN214374139U true CN214374139U (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120120239.8U Active CN214374139U (en) | 2021-01-15 | 2021-01-15 | Intelligent molding sand air permeability tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116297071A (en) * | 2022-12-05 | 2023-06-23 | 马鞍山海森控电气有限公司 | Air permeability tester for casting molding sand and testing method thereof |
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2021
- 2021-01-15 CN CN202120120239.8U patent/CN214374139U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116297071A (en) * | 2022-12-05 | 2023-06-23 | 马鞍山海森控电气有限公司 | Air permeability tester for casting molding sand and testing method thereof |
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