Positive pressure filtering device for chemical reagent

Abstract

The utility model relates to the technical field of chemical equipment, in particular to a chemical reagent positive pressure filtering device which comprises a support and a filtering barrel arranged on the support, a discharging hopper is detachably installed at the bottom end of the filtering barrel, and filter paper and a filtering plate are detachably arranged on the abutting face of the discharging hopper and the filtering barrel. A piston is vertically and movably arranged in the filtering barrel through a linear driving part, a hollow guide pipe is fixed to the top end of the piston, the guide pipe extends to the outside of the filtering barrel and is detachably provided with a sealing cover, and a liquid inlet hole communicated with the interior of the guide pipe is formed in the piston in a penetrating mode; the cavity for containing the filtrate at the bottom end of the filter barrel is compressed through the piston, the contact area is large, pressurization is fast, the filtrate can be rapidly extruded out, the working efficiency is high, and the discharging funnel is detachably installed at the bottom end of the support so that filter paper can be conveniently replaced and residues can be conveniently treated according to the filtering requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a chemical reagent positive pressure filtering device. Background Art

[0002] Chemical reagent positive pressure filter is a kind of filter used for filtering operations in chemical laboratories and pharmaceutical fields. It uses positive pressure to act on the filter to transfer chemical reagents from the high-pressure area to the low-pressure area, so that the reagents can be separated by passing through the filter.

[0003] In the Chinese Patent Literature Library, patent application number 201922400414.4 discloses a chemical reagent positive pressure filtration device. A compression tube is set at the top of the filter cup. By pressing down the compression tube, pressurizes the inside of the filter cup to accelerate the filtrate to pass through the filter paper and filter plate below. In actual use, the compression tube is small in size, the operation is laborious, and the work efficiency is low. Summary of the Invention

[0004] The purpose of the utility model is to provide a chemical reagent positive pressure filtering device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a chemical reagent positive pressure filtering device, comprising a bracket and a filter barrel arranged on the bracket, a discharge funnel being detachably mounted on the bottom end of the filter barrel, and filter paper and a filter plate being detachably mounted on the abutting surface between the discharge funnel and the filter barrel, a piston being arranged inside the filter barrel so as to move up and down through a linear drive member, and a hollow guide tube being fixed to the top end of the piston, the guide tube extending to the outside of the filter barrel and being detachably provided with a sealing cover, and a liquid inlet hole being penetrated by the piston and communicating with the interior of the guide tube.

[0006] Furthermore, a plurality of air holes are provided through the top of the filter barrel.

[0007] Furthermore, the bracket includes a bottom plate and a top plate that are parallel to each other and a plurality of support rods connecting the two. A through hole that is compatible with the filter barrel is provided in the middle of the top plate, and a limit plate is provided at the edge of the top of the filter barrel.

[0008] Furthermore, the limiting plate is detachably overlapped on the top of the top plate, a plurality of positioning rods are provided on the top of the top plate, and a plurality of through holes adapted to the positioning rods are penetrated and provided on the limiting plate.

[0009] Furthermore, the top end of the positioning rod is provided with an inserting section whose size gradually increases from top to bottom.

[0010] Furthermore, the linear drive member is a threaded rod threadedly connected to the middle of the top of the filter barrel, and the bottom end of the linear drive member extends to the interior of the filter barrel and is rotationally connected to the piston.

[0011] Furthermore, the discharge funnel includes a vertical section threadedly connected to the bottom end of the outer side of the filter barrel and a reduced diameter section integrally arranged at the bottom end of the vertical section. The reduced diameter section gradually reduces in size from top to bottom. A support ring is fixed on the inner side wall of the vertical section. The filter paper and filter plate are placed on the top of the support ring in sequence from top to bottom, and the bottom end of the filter barrel is pressed onto the top of the filter paper and filter plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The chemical reagent positive pressure filtration device is provided with a piston inside the filter barrel, and a linear drive member is provided on the top of the piston to drive it to move up and down. The piston compresses the cavity at the bottom of the filter barrel where the filtrate is placed, resulting in a large contact area, fast pressurization, and rapid extrusion of the filtrate, thereby achieving high working efficiency.

[0014] By detachably installing a discharge funnel at the bottom of the bracket, it is convenient to replace the filter paper and handle the residue according to the filtering needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 3 This is an explosion diagram of the utility model.

[0018] In the figure: 1. Bracket; 101. Bottom plate; 102. Top plate; 103. Support rod; 104. Positioning rod; 2. Filter barrel; 201. Air hole; 202. Limit plate; 3. Feeding funnel; 301. Vertical section; 302. Reduced diameter section; 303. Support ring; 4. Piston; 401. Liquid inlet; 5. Linear drive member; 6. Guide tube; 7. Filter paper; 8. Filter plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. In the description of the present invention, it should be noted that the terms "first", "second", etc. are only used for descriptive purposes and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" can explicitly or implicitly include at least one of the features. For the purpose of the description and claims of the present invention and the above-mentioned drawings, the terms "including" and any variations thereof are intended to cover non-exclusive inclusions.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a communication between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, in the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0021] See also Figure 1-3, the utility model provides an embodiment: a chemical reagent positive pressure filtration device, comprising a bracket 1 and a filter barrel 2 arranged on the bracket 1, specifically, the bracket 1 comprises a bottom plate 101, a top plate 102 and a plurality of supporting rods 103 that are parallel to each other and opposite to each other, the middle of the top plate 102 is penetrated by a through hole that is adapted to the filter barrel 2, and a limiting plate 202 is provided at the edge of the top of the filter barrel 2. In this embodiment, the filter barrel 2 is a cylindrical structure, and a transparent observation window can be provided on the side wall. The limiting plate 202 is detachably overlapped on the top of the top plate 102, and a plurality of positioning rods 104 are provided on the top of the top plate 102. The limiting plate 202 is penetrated by a plurality of positioning rods 104. The filter barrel 2 is movably placed above the bracket 1 through a through hole that matches the rod 104, and the limit plate 202 is overlapped on the top of the top plate 102. The positioning rod 104 is inserted into the through hole to play a limiting role to prevent the filter barrel 2 and the bracket 1 from rotating relative to each other. In this embodiment, the top of the positioning rod 104 is provided with a plug-in section with a size gradually increasing from top to bottom, which is convenient for plugging. After the filtration is completed, the filter barrel 2 can also be removed for cleaning. The distance between the bottom plate 101 and the top plate 102 is greater than the height of the filter barrel 2. A liquid receiving trough for receiving the filtrate can be placed on the top of the bottom plate 101. Furthermore, the limit plate 202 can also be fixedly connected to the top plate 102 as needed.

[0022] The filter paper 7 and the filter plate 8 are placed on the top of the support ring 303 in sequence from top to bottom, and the bottom end of the filter barrel 2 is pressed against the top of the filter paper 7 and the filter plate 8. During assembly, the filter paper 7 and the filter plate 8 are placed on the top of the support ring 303 in sequence, and the vertical section 301 is then rotated and fixed to the bottom end of the filter barrel 2 until the bottom end of the filter barrel 2 is pressed against the top of the filter paper 7, thereby fixing the filter paper 7 and the filter plate 8, making it convenient to replace the filter paper 7 according to filtering needs and to handle the residue after filtering is completed.

[0023] The interior of the filter barrel 2 is provided with a piston 4 that moves up and down through a linear drive member 5. The piston 4 divides the interior of the filter barrel 2 into two independent chambers, upper and lower. In this embodiment, the linear drive member 5 is a threaded rod connected to the middle thread of the top of the filter barrel 2, and a knob is fixed to the top of the threaded rod. The bottom end of the linear drive member 5 extends to the interior of the filter barrel 2 and is rotatably connected to the piston 4. The piston 4 is driven downward by rotating the threaded rod, which is more labor-saving to use when the internal pressure of the filter barrel 2 is relatively high. Furthermore, the linear drive member 5 can also be set as an electric push rod, etc. as needed. A number of air holes 201 are provided through the top of the filter barrel 2, so that the chamber at the top of the filter barrel 2 is connected to the outside, which facilitates the piston 4 to move up and down inside the filter barrel 2.

[0024] A hollow guide tube 6 is fixed to the top of the piston 4. The guide tube 6 extends to the outside of the filter barrel 2 and is rotatably provided with a sealing cover. A liquid inlet hole 401 connected to the inside of the guide tube 6 is provided through the piston 4. Chemical reagents to be filtered can be added to the chamber at the bottom of the filter barrel 2, and the chamber at the bottom can also be connected to the outside. At the same time, the guide tube 6 and the top of the filter barrel 2 slide relative to each other, and can also guide and limit the up and down movement of the piston 4. In this embodiment, there can be multiple guide tubes 6, and the remaining guide tubes 6 can be solid structures.

[0025] Working principle: When in use, rotate the linear drive part 5 to adjust the piston 4 to the top of the inside of the filter barrel 2, then add the chemical reagent to be filtered into the filter barrel 2 through the guide tube 6, then screw on the sealing cover on the top of the guide tube 6, rotate the linear drive part 5, drive the piston 4 to move downward for pressurization, accelerate the filtrate to pass through the filter paper 7 and the filter plate 8 and then be discharged through the discharge funnel 3. As the piston 4 moves up and down, the guide tube 6 and the top of the filter barrel 2 slide relative to each other for guidance. When the piston 4 moves to the lowest end but has not been completely filtered, the sealing cover on the top of the guide tube 6 can be opened, and the piston 4 can be pulled to the top through the linear drive part 5, and then the downward operation can be repeated.

[0026] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A chemical reagent positive pressure filtration device, comprising a bracket (1) and a filter barrel (2) arranged on the bracket (1), characterized in that: A discharge funnel (3) is detachably mounted on the bottom end of the filter barrel (2), and filter paper (7) and a filter plate (8) are detachably mounted on the contact surface between the discharge funnel (3) and the filter barrel (2). A piston (4) is mounted inside the filter barrel (2) to move up and down via a linear drive member (5), and a hollow guide tube (6) is fixed to the top end of the piston (4). The guide tube (6) extends to the outside of the filter barrel (2) and is detachably provided with a sealing cover. A liquid inlet hole (401) communicating with the interior of the guide tube (6) is penetrated through the piston (4).

2. The chemical reagent positive pressure filtration device according to claim 1, characterized in that: A plurality of air holes (201) are provided through the top of the filter barrel (2).

3. The chemical reagent positive pressure filtration device according to claim 1, characterized in that: The bracket (1) comprises a bottom plate (101) and a top plate (102) that are parallel and opposite to each other, and a plurality of support rods (103) connecting the bottom plate (101) and the top plate (102). A through hole that is adapted to the filter barrel (2) is provided through the middle of the top plate (102). A limiting plate (202) is provided at the edge of the top end of the filter barrel (2).

4. The chemical reagent positive pressure filtration device according to claim 3, characterized in that: The limiting plate (202) is detachably connected to the top of the top plate (102), a plurality of positioning rods (104) are provided at the top of the top plate (102), and a plurality of through holes adapted to the positioning rods (104) are provided through the limiting plate (202).

5. The chemical reagent positive pressure filtration device according to claim 4, characterized in that: The top end of the positioning rod (104) is provided with an inserting section whose size gradually increases from top to bottom.

6. The chemical reagent positive pressure filtration device according to claim 1, characterized in that: The linear drive member (5) is a threaded rod threadably connected to the middle of the top end of the filter barrel (2), and the bottom end of the linear drive member (5) extends into the interior of the filter barrel (2) and is rotationally connected to the piston (4).

7. The chemical reagent positive pressure filtration device according to claim 1, characterized in that: The discharge funnel (3) comprises a vertical section (301) threadedly connected to the bottom end of the outer side of the filter barrel (2) and a reduced diameter section (302) integrally arranged at the bottom end of the vertical section (301), wherein the reduced diameter section (302) gradually decreases in size from top to bottom, and a support ring (303) is fixed on the inner side wall of the vertical section (301), and the filter paper (7) and the filter plate (8) are sequentially placed on the top end of the support ring (303) from top to bottom, and the bottom end of the filter barrel (2) is pressed against the top end of the filter paper (7) and the filter plate (8).

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