Sand core crucible filtering device

Abstract

The utility model belongs to the technical field of filtering equipment, and discloses a sand core crucible filtering device which comprises a liquid collecting bottle, a first blanking cap, a sand core crucible and a second blanking cap, and the liquid collecting bottle is provided with an extraction opening used for being connected with a vacuum pump; the opening of the liquid collecting bottle is blocked by the first blocking cover; the sand core crucible is fixed on the first blanking cap, and the first blanking cap is provided with a liquid collecting channel communicated with the sand core crucible and the liquid collecting bottle; the second blanking cap blocks the crucible opening of the sand core crucible, and the second blanking cap or the sand core crucible is provided with a first guide pipe which is communicated with the internal space of the sand core crucible and the outside. According to the sand core crucible filtering device, the filtering efficiency and the sealing effect of the sand core crucible are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering equipment, in particular to a filtering device for a sand core crucible. Background Art

[0002] The sand core crucible, also known as a fritted crucible, is suitable for filtering different substances such as chemical analysis, hygiene inspection, pharmaceutical industry, biological products, etc. When filtering by using the sand core crucible, the sand core crucible is usually placed at the bottle mouth of a liquid collection bottle and hermetically connected to the liquid collection bottle, and then a vacuum pump connected to the liquid collection bottle is used to pump vacuum to form a negative pressure in the liquid collection bottle, so that the liquid to be filtered enters the liquid collection bottle from the sand core crucible to complete the filtration. Since the volume of the liquid to be filtered is large, it is necessary to manually open the rubber stopper blocking the opening of the sand core crucible multiple times to pour the filtered liquid into the sand core crucible. This method results in low filtration efficiency and poor sealing performance due to the multiple disassembly of the rubber stopper blocking the opening of the sand core crucible. Content of the Utility Model

[0003] The purpose of the utility model is to provide a filtering device for a sand core crucible to solve the problems of low filtration efficiency and poor sealing performance caused by multiple disassembly of the rubber stopper at the opening of the sand core crucible.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The filtering device for a sand core crucible includes a liquid collection bottle, a first plug, a sand core crucible, and a second plug. An air extraction port for connecting a vacuum pump is provided on the liquid collection bottle; the first plug seals the bottle mouth of the liquid collection bottle; the sand core crucible is fixed on the first plug, and a liquid collection channel communicating the sand core crucible and the liquid collection bottle is provided on the first plug; the second plug seals the crucible mouth of the sand core crucible, and a first conduit communicating the internal space of the sand core crucible and the outside is provided on the second plug or the sand core crucible.

[0006] In one embodiment, the first conduit is arranged at the top of the second plug.

[0007] In one embodiment, a circular first flange plate is arranged on the outer periphery of the crucible mouth of the sand core crucible, a circular second flange plate is arranged on the outer periphery of the second plug, and the sand core crucible and the second plug are fixed by a clamp that clamps the first flange plate and the second flange plate.

[0008] In one embodiment, the first flange plate and / or the second flange plate has a frosted surface layer.

[0009] In one embodiment, the fixture includes an upper clamping mouth, a lower clamping mouth and an elastic member. The upper clamping mouth is hinged to the lower clamping mouth through a hinge shaft, and the elastic member makes the ends of the upper clamping mouth and the lower clamping mouth away from the hinge shaft keep a tendency of approaching each other.

[0010] In one embodiment, both the upper clamping mouth and the lower clamping mouth are arranged in a U shape, and clamping blocks are arranged at opposite ends of the upper clamping mouth and the lower clamping mouth.

[0011] In one embodiment, the first plug is made of a rubber plug, and the core crucible is in plug-in fit with the rubber plug.

[0012] In one embodiment, the air extraction port is connected with a second conduit, and a first water stop member is arranged on the second conduit.

[0013] In one embodiment, the first water stop member is an electric normally open water stop valve. The electric normally open water stop valve is connected with a first wire and a second wire. The first wire extends into the liquid collection bottle, and the second wire extends into the second conduit.

[0014] In one embodiment, a liquid outlet is arranged on the liquid collection bottle. The liquid outlet is located below the air extraction port, and a second water stop member is arranged at the liquid outlet.

[0015] Advantages of the present utility model:

[0016] In the core crucible filtering device in the embodiment of the present utility model, a first conduit communicating with the outside is arranged on the second plug or the core crucible. When the first conduit is inserted into the liquid storage container, under the suction action of the vacuum pump, the liquid to be filtered placed in the liquid storage container can be sucked into the core crucible to complete filtration, without the need to open the second plug multiple times, improving the filtration efficiency and ensuring the sealing performance between the core crucible and the second plug. Description of the drawings

[0017] Figure 1 is a schematic structural diagram of the core crucible filtering device in the embodiment of the present utility model.

[0018] In the figure:

[0019] 1. Core crucible; 2. Liquid collection bottle; 21. Air extraction port; 22. Liquid outlet; 3. First plug; 4. Second plug; 5. First conduit; 6. Fixture; 7. Second conduit; 8. Electric normally open water stop valve; 81. First wire; 82. Second wire; 9. Water stop clamp;

[0020] 10. Vacuum pump; 20. Liquid storage container. Detailed implementation manners

[0021] The following further describes the present utility model in detail in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all structures are shown in the accompanying drawings.

[0022] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0024] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the accompanying drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0025] Reference Figure 1As shown in the figure, in an embodiment of the present utility model, a sand core crucible filtration device is proposed, which includes a liquid collection bottle 2, a sand core crucible 1, a first plug 3 and a second plug 4. The first plug 3 seals the bottle mouth of the liquid collection bottle 2. The liquid collection bottle 2 is also provided with an air extraction port 21 for connecting a vacuum pump 10. The liquid collection bottle 2 can form a negative pressure under the suction of the vacuum pump 10. The sand core crucible 1 is fixed on the first plug 3. The first plug 3 is provided with a liquid collection channel connecting the sand core crucible 1 and the liquid collection bottle 2. The second plug 4 seals the crucible mouth of the sand core crucible 1, and a first conduit 5 connecting the internal space of the sand core crucible 1 and the outside world is provided on the second plug 4 or the sand core crucible 1. One end of the first conduit 5 away from the second plug 4 can be placed in a liquid storage container 20 containing the liquid to be filtered. The liquid storage container 20 can be a beaker.

[0026] The above-mentioned sand core crucible filtration device is provided with a first conduit 5 communicating with the outside world on the second plug 4 or the sand core crucible 1. When the first conduit 5 is inserted into the liquid storage container 20, under the suction of the vacuum pump 10, the liquid to be filtered placed in the liquid storage container 20 can be sucked into the sand core crucible 1 to complete the filtration, without having to open the second plug 4 multiple times, improving the filtration efficiency and ensuring the sealing between the sand core crucible 1 and the second plug 4. The improvement of the sealing helps to form a negative pressure environment in the liquid collection bottle 2, thus further improving the filtration speed.

[0027] Of course, it can be understood that during the suction process, the liquid storage container 20 is in a state of continuous stirring or vibration, so that the substances insoluble in the liquid to be filtered in the liquid storage container 20 can all enter the sand core crucible 1 through the first conduit 5, thereby improving the accuracy of quantitative determination of the filtered impurities.

[0028] In one embodiment, the first conduit 5 is arranged at the top of the second plug 4 to make full use of the space inside the sand core crucible 1, so that the inside of the sand core crucible 1 can be filled with the liquid to be filtered.

[0029] In order to maintain good sealing while reducing the disassembly and assembly difficulty and facilitating the cleaning of the residual substances in the sand core crucible 1 later. An annular first flange plate is arranged on the outer periphery of the crucible mouth of the sand core crucible 1, and an annular second flange plate is arranged on the outer periphery of the second plug 4. The sand core crucible 1 and the second plug 4 are fixed by a fixture 6 that clamps the first flange plate and the second flange plate. At the same time, in order to improve the clamping stability of the fixture 6 relative to the sand core crucible 1 and the plug, the first flange plate and / or the second flange plate has a frosted surface layer.

[0030] In one embodiment, the fixture 6 includes an upper clamping jaw and a lower clamping jaw hinged by a hinge shaft, and further includes an elastic member. The elastic member causes the ends of the upper clamping jaw and the lower clamping jaw away from the hinge shaft to maintain a tendency to approach each other, thereby clamping the core crucible 1 and the second plug 4. Specifically, both the upper clamping jaw and the lower clamping jaw are arranged in a U shape, and clamping blocks are arranged at opposite ends of the upper clamping jaw and the lower clamping jaw. When the fixture 6 clamps the core crucible 1 and the plug, it can clamp the core crucible 1 and the second plug 4 at two spaced positions, and the clamping effect is good.

[0031] As for the first plug 3, a rubber plug can be used. The bottom of the core crucible 1 is inserted into the liquid collection channel to achieve a plug-in fit with the rubber plug. Specifically, in order to improve the sealing performance, a conical rubber plug is used.

[0032] As the volume of the liquid in the liquid collection bottle 2 increases, the liquid is easily sucked into the vacuum pump 10. To prevent the above situation from occurring, a second conduit 7 is also connected to the air extraction port 21, and a first water stop member is arranged on the second conduit 7. The first water stop member can cut off the connection between the liquid collection bottle 2 and the vacuum pump 10.

[0033] In order to achieve automatic control of the on-off between the vacuum pump 10 and the liquid collection bottle 2, the first water stop member adopts an electrically normally open water stop valve 8. The two ends of the coil used to control the movement of the valve core in the electrically normally open water stop valve 8 are respectively connected with a first wire 81 and a second wire 82. The first wire 81 extends into the liquid collection bottle 2 and is located at the bottom of the liquid collection bottle 2, and the second wire 82 extends into the second conduit 7. Then, when the liquid level in the liquid collection bottle 2 is higher than the air extraction port 21, it will enter the second conduit 7 and contact the second wire 82 located in the second conduit 7, so that the electrically normally open water stop valve 8 forms a closed circuit and the electrically normally open water stop valve 8 closes. In one embodiment, the first wire 81 passes through the first plug 3 and penetrates into the liquid collection bottle 2.

[0034] In order to facilitate the discharge of the liquid in the liquid collection bottle 2, a liquid outlet 22 is also provided on the liquid collection bottle 2 and a second water stop member is arranged at the liquid outlet 22. The second water stop member can block the liquid outlet 22 to prevent the liquid in the liquid collection bottle 2 from flowing out during the filtration process. Obviously, the liquid outlet 22 is located below the air extraction port 21, and the lower the position of the liquid outlet 22 on the liquid collection bottle 2, the easier it is to discharge the liquid in the liquid collection bottle 2.

[0035] Specifically, the second water stop member adopts a clip 9 to reduce costs.

[0036] When performing filtration detection, turn on the switch of the vacuum pump 10. The liquid to be filtered enters the core crucible 1 through the first conduit 5. During the filtration process, the filtered liquid enters the liquid collection bottle 2. When the liquid in the liquid collection bottle 2 enters and contacts the second wire 82 at the air extraction port 21, the electrically normally open water stop valve 8 automatically closes and the suction filtration process stops.

[0037] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A sand core crucible filtering device, characterized in that Including: A liquid collecting bottle (2), on which an air extraction port (21) for connecting a vacuum pump (10) is provided; A first plug cover (3), plugged at the bottle mouth of the liquid collecting bottle (2); A sand core crucible (1), fixed on the first plug cover (3), and a liquid collecting channel communicating the sand core crucible (1) and the liquid collecting bottle (2) is provided on the first plug cover (3); A second plug cover (4), plugged at the crucible mouth of the sand core crucible (1), and a first conduit (5) communicating the internal space of the sand core crucible (1) and the outside is provided on the second plug cover (4) or the sand core crucible (1).

2. The core sand crucible filtering device according to claim 1, characterized in that The first conduit (5) is arranged at the top of the second plug cover (4).

3. The core crucible filtering device according to claim 1, wherein, An annular first flange disc is arranged on the outer periphery of the crucible mouth of the sand core crucible (1), and an annular second flange disc is arranged on the outer periphery of the second plug cover (4). The sand core crucible (1) and the second plug cover (4) are fixed by a fixture (6) that clamps the first flange disc and the second flange disc.

4. The core crucible filtering device according to claim 3, characterized in that, The first flange disc and / or the second flange disc is / are of a frosted surface layer.

5. The coreless crucible filtration device according to claim 3, characterized in that, The fixture (6) includes an upper clamping mouth, a lower clamping mouth and an elastic member. The upper clamping mouth is hinged to the lower clamping mouth through a hinge shaft, and the elastic member makes the ends of the upper clamping mouth and the lower clamping mouth away from the hinge shaft keep a tendency of approaching each other.

6. The sand core crucible filtering device according to claim 5, wherein, Both the upper clamping mouth and the lower clamping mouth are arranged in a U shape, and clamping blocks are arranged at the opposite ends of the upper clamping mouth and the lower clamping mouth.

7. The coreless crucible filtering device according to any one of claims 1-6, characterized in that, The first plug cover (3) is made of a rubber stopper, and the sand core crucible (1) is in plug-in fit with the rubber stopper.

8. The sand core crucible filtering device according to any one of claims 1-6, characterized in that, The air extraction port (21) is connected with a second conduit (7), and a first water stop member is arranged on the second conduit (7).

9. The sand core crucible filtering device according to claim 8, characterized in that, The first water stop member is an electric normally open water stop valve (8). The electric normally open water stop valve (8) is connected with a first wire (81) and a second wire (82). The first wire (81) extends into the liquid collecting bottle (2), and the second wire (82) extends into the second conduit (7).

10. The sand core crucible filtering device according to any one of claims 1-6, characterized in that, A liquid outlet (22) is provided on the liquid collecting bottle (2). The liquid outlet (22) is located below the air extraction port (21), and a second water stop member is arranged at the liquid outlet (22).

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