Positive pressure filter capable of continuously switching gas-liquid supply

Abstract

The utility model discloses a positive pressure filter capable of continuously switching gas-liquid supply, which belongs to the technical field of positive pressure filters and comprises a main frame, a gas-liquid input cover is fastened and fixed at the top end of the main frame, the gas-liquid input cover comprises a top cover frame, a gas inlet valve pipe is fixed in the middle of the top end of the top cover frame, and a gas outlet valve pipe is fixed in the middle of the top end of the top cover frame. An air outlet valve pipe is fixed to one side of the top cover frame, a pressure gauge is fixed to the top end of the air outlet valve pipe, and a liquid inlet valve pipe is fixed to the other side of the top face of the top cover frame. According to the positive pressure filter, the liquid inlet valve pipe arranged in the top cover frame is communicated with carriers such as a pump machine and a filtered liquid pipeline, so that the liquid is pushed to the liquid outlet in the bottom of the telescopic sleeve in cooperation with the hose in the liquid inlet valve pipe, liquid needing to be filtered is fed, and the top cover frame body does not need to be disassembled in the process; switching of liquid supply and air pressure supply is formed through telescopic regulation and control, the filtering treatment efficiency is improved, and the phenomena that the process is tedious and external impurities are mixed into the cavity due to a traditional dismounting mode are avoided.

Description

Technical Field

[0001] This utility model relates to the field of positive pressure filter technology, specifically a positive pressure filter with continuously switchable gas-liquid supply. Background Technology

[0002] Positive pressure filters, also known as small mechanical filters, are made of stainless steel and are the preferred product for small units such as small pharmaceutical plants, food and beverage companies, factories, mines, hospitals, and laboratories for filtering, clarifying, and sterilizing liquids. They are devices that achieve high-efficiency filtration by maintaining an internal pressure higher than the external environment. They are mainly used for the purification of liquids or gases, and their core functions are to intercept impurities, ensure fluid cleanliness, and prevent contaminant leakage. With their high efficiency, pressure resistance, and flexible adaptability, they have become key equipment in the pharmaceutical, food, and chemical industries.

[0003] Existing cylindrical positive pressure filters mainly consist of three parts: a top cover, a middle cylinder, and a base. The top cover has an air inlet and an air outlet, with a pressure gauge connected to the outlet to monitor the pressure during filtration. Filter plates are placed on the base, and different filter membranes can be laid on these plates as needed for filtration. During operation, the top cover is opened, and the liquid to be filtered is poured into the middle cylinder. The top cover is then closed and sealed. After the three parts are assembled and sealed, compressed air is continuously injected into the filter chamber through an external air source, such as an air compressor or pump, creating an internal pressure environment higher than ambient pressure. This pressure gradient forces the fluid to be filtered through the filter membrane or filter cloth, thus trapping impurities. When adding liquid after filtration is complete inside the filter chamber, the lifting bolts around the top cover need to be unscrewed one by one before the liquid can be poured in again. This results in a lack of continuity in the liquid filtration process, numerous operation steps, and the process of disassembling and adding liquid can easily allow external impurities to enter the filter chamber, affecting the filtration effect and causing quality problems. Summary of the Invention

[0004] This invention provides a positive pressure filter with continuously switchable gas-liquid supply. After filtration is completed, there is no need to remove the top cover to add filtrate, which can achieve continuous filtration and is more convenient to operate.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A positive pressure filter with continuously switchable gas-liquid supply includes a main frame. A gas-liquid input cover is fastened and fixed to the top of the main frame. The gas-liquid input cover includes a top cover frame. An air inlet valve pipe is fixed to the middle of the top of the top cover frame. An air outlet valve pipe is fixed to one side of the top cover frame. A pressure gauge is fixed to the top of the air outlet valve pipe. An inlet liquid valve pipe is fixed to the other side of the top surface of the top cover frame. A control panel and a battery module are fixed to both sides of the inlet liquid valve pipe, respectively. A liquid level probe is fixed to the bottom of the inlet liquid valve pipe. One end of a flexible hose is connected inside the inlet liquid valve pipe. The other end of the flexible hose is connected to the liquid outlet at the bottom of a telescopic sleeve. A telescopic groove is formed at the center of the top of the telescopic sleeve. An electric push rod is fixed to one side of the top of the telescopic sleeve. The top of the electric push rod is embedded in one side of the bottom of the air inlet valve pipe. Air inlet holes are formed on both sides of the bottom of the air inlet valve pipe.

[0007] In the above-described structure, the air inlet valve pipe, the air outlet valve pipe, and the liquid inlet valve pipe are all fixedly connected to the top cover frame, and the bottom ends of the air inlet valve pipe, the air outlet valve pipe, and the liquid inlet valve pipe are connected to the interior of the main frame.

[0008] The control panel, battery module, and liquid level probe are electrically connected, and the inside of the inlet valve pipe is connected to the bottom of the telescopic sleeve via a flexible hose.

[0009] The telescopic sleeve is telescopically engaged with the bottom end of the intake valve pipe through a telescopic groove, and the intake holes are symmetrically opened and connected along both sides of the bottom end of the intake valve pipe.

[0010] The telescopic sleeve forms a telescopic structure with the bottom end of the intake valve pipe via an electric push rod, and the electric push rod is electrically connected to the control panel and the battery module.

[0011] The main frame includes a cylindrical frame, with handles fixed to the outer walls of both sides of the cylindrical frame. Clamping rings are fixed to the upper and lower ends of the cylindrical frame, with sealing rings embedded in the inner walls of the clamping rings. Lifting eye bolts are distributed and connected around the clamping rings. A base is engaged at the bottom of the cylindrical frame, with a discharge pipe connected to the center of the bottom end of the base. Support frames are distributed around the bottom end of the base, and casters are connected to the bottom ends of the support frames.

[0012] The cylindrical frame is fastened to the base by a retaining ring, and the lifting ring bolts are distributed in a ring around the outer wall of the retaining ring.

[0013] Beneficial effects: This utility model provides a positive pressure filter with continuously switchable gas-liquid supply, which has the following advantages compared with the prior art:

[0014] This utility model of positive pressure filter connects to the pump and filter liquid pipeline through the liquid inlet valve pipe built into the top cover frame. It then pushes the flexible tube inside the liquid inlet valve pipe to the telescopic sleeve to complete the input of the liquid to be filtered. The top cover frame body does not need to be removed during the process. As needed, the telescopic sleeve connected to the electric push rod can be raised through the control panel to close the air inlet holes on both sides of the air inlet valve pipe, keeping the liquid supply process stable. The telescopic control can switch between liquid supply and air pressure supply, improve the filtration efficiency, and avoid the cumbersome process and external impurities mixed into the cavity caused by traditional disassembly methods.

[0015] When supplying the liquid to be filtered, the liquid level of the positive pressure filter of this utility model can be monitored by a liquid level probe fixed at the bottom to avoid the liquid level being too high and affecting the use. The monitoring information can be transmitted to the control panel in real time through the liquid level probe, so that the operator can control the set liquid level when inputting liquid.

[0016] This utility model of positive pressure filter is composed of a cylindrical frame, a top gas-liquid inlet cover, and a bottom base. The components are interlocked by retaining rings and sealed with a sealing ring to maintain stable airtightness after closure. It can be disassembled by adjusting the lifting bolts around the perimeter. The top gas-liquid inlet cover retains its detachable function while allowing filtered liquid to be input, thus facilitating subsequent cleaning operations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the main frame of this utility model;

[0018] Figure 2 This is a top view of the cylindrical frame structure of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the gas-liquid input cover of this utility model;

[0020] Figure 4 This is a side view of the internal structure of the gas-liquid input cover of this utility model;

[0021] Figure 5 This is a side view of the internal structure of the air inlet valve pipe in the gas-liquid input cover of this utility model;

[0022] Figure 6 This is a schematic diagram of the internal filter plate structure of the main frame of this utility model.

[0023] In the diagram: 1. Main frame; 101. Cylindrical frame; 102. Handle; 103. Snap ring; 104. Sealing ring; 105. Lifting eye bolt; 106. Base; 107. Discharge pipe; 108. Support frame; 109. Casters; 2. Gas-liquid input cover; 201. Top cover; 202. Air inlet valve pipe; 203. Air outlet valve pipe; 204. Pressure gauge; 205. Liquid inlet valve pipe; 206. Control panel; 207. Liquid level probe; 208. Hoses; 209. Telescopic sleeve; 210. Telescopic groove; 211. Electric push rod; 212. Air inlet. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0025] like Figure 1-5 A positive pressure filter with continuously switchable gas-liquid supply is shown, including a main frame 1. A gas-liquid input cover 2 is fastened and fixed to the top of the main frame 1. The main frame 1 includes a cylindrical frame 101. Handles 102 are fixed to the outer walls of both sides of the cylindrical frame 101. Clamping rings 103 are fixed to the upper and lower ends of the cylindrical frame 101. Sealing rings 104 are embedded in the inner wall of the clamping rings 103. Lifting bolts 105 are distributed and connected around the clamping rings 103. A base 106 is fastened to the bottom of the cylindrical frame 101. A filter plate is placed on the upper end of the base 106. A discharge pipe 107 is connected to the center of the bottom end. Support frames 108 are distributed around the bottom end of the base 106. Casters 109 are connected to the bottom end of the support frames 108.

[0026] To facilitate disassembly and cleaning of the entire filter and maintain overall structural stability, such as Figure 1-2 As shown, this positive pressure filter is formed by a cylindrical frame 101, a top gas-liquid inlet cover 2, and a bottom base 106. They are interlocked by retaining rings 103 and sealed with sealing rings 104 to maintain airtightness after closure. It can be disassembled by adjusting the lifting bolts 105 around the perimeter. The top gas-liquid inlet cover 2 retains its detachable function while allowing the input of filtered liquid, thus facilitating subsequent cleaning operations.

[0027] like Figure 3-5As shown, the gas-liquid input cover 2 includes a top cover 201. An air inlet valve pipe 202 is fixed to the middle of the top of the top of the top cover 201. An air outlet valve pipe 203 is fixed to one side of the top of the top of the top of the top cover 201. A pressure gauge 204 is fixed to the top of the air outlet valve pipe 203. An inlet liquid valve pipe 205 is fixed to the other side of the top of the top of the top of the top cover 201. A control panel 206 and a battery module are fixed to both sides of the inlet liquid valve pipe 205, respectively. A liquid level probe 207 is fixed to the bottom of the inlet liquid valve pipe 205. One end of a hose 208 is connected inside the inlet liquid valve pipe 205. The other end of the hose 208 is connected to the liquid outlet at the bottom of the telescopic sleeve 209. A telescopic groove 210 is opened at the center of the top of the telescopic sleeve 209. An electric push rod 211 is fixed to one side of the top of the telescopic sleeve 209. The top of the electric push rod 211 is embedded in one side of the bottom of the air inlet valve pipe 202. Air inlet holes 212 are opened on both sides of the bottom of the air inlet valve pipe 202.

[0028] To provide a rapid supply of filtrate, such as Figure 3-5 As shown, this positive pressure filter can be connected to the pump and filter liquid pipeline through the liquid inlet valve pipe 205 built into the top cover 201. In this way, the hose 208 in the liquid inlet valve pipe 205 can be pushed to the liquid outlet at the bottom of the telescopic sleeve 209 to complete the input of the liquid to be filtered. In this process, the top cover frame 201 body does not need to be removed. As needed, the telescopic sleeve 209 connected to the electric push rod 211 can be raised through the control panel 206 to close the air inlet holes 212 on both sides of the air inlet valve pipe 202, so as to maintain the stability of the liquid supply process. The telescopic control can switch between liquid supply and air pressure supply, improve the filtration efficiency, and avoid the cumbersome process and external impurities mixed into the cavity caused by the traditional disassembly method.

[0029] When supplying filtered liquid, the liquid level of the inlet valve pipe 205 can be monitored by the liquid level probe 207 fixed at the bottom to avoid the liquid level being too high and affecting the use. The monitoring information can be transmitted to the control panel 206 in real time through the liquid level probe 207, so that the operator can control the set liquid level when inputting liquid.

[0030] When using the above-mentioned positive pressure filter, firstly, the retaining rings 103 fixed at the upper and lower ends of the cylindrical frame 101 are fastened to the base 106 and the top cover 201. Then, the lifting eye bolts 105 around the perimeter are rotated and fastened to the corresponding retaining rings 103 on the base 106 and the top cover 201, and tightened with threads. After assembly, the top end of the liquid inlet valve pipe 205 can be connected to the external pump and the liquid container to be filtered through the pipeline structure. At the same time, the air inlet valve pipe 202 is connected to the external air pump structure. At this time, the bottom end of the air inlet valve pipe 202 is connected to the telescopic sleeve 209, and the air inlets 212 on both sides are also closed by the telescopic sleeve 209, while the air outlet valve pipe 203 remains open. Liquid can be introduced into the cavity through the inlet valve pipe 205, the hose 208, the bottom of the telescopic sleeve 209, and discharged into the cavity. When the liquid level reaches the set threshold, the monitoring signal is transmitted to the control panel 206 through the liquid level probe 207. At this time, the operator can stop the liquid injection and then close the inlet valve pipe 205. Then, the electric push rod 211 can be adjusted through the control panel 206 to extend and expand the telescopic sleeve 209 along the bottom of the air inlet valve pipe 202, exposing the air inlets 212 on both sides. Then the outlet valve pipe 203 is closed, and gas is injected through the air inlets 212 and the external air pump to form an internal positive pressure to assist the liquid in filtration. The entire process does not require manual disassembly of the filter device to add filtered liquid, nor does it require manual adjustment of the air pressure.

[0031] It should be noted that the concepts of "first" and "second" mentioned above are only used to distinguish different devices, modules, or units, and are not used to limit the order of the functions performed by these devices, modules, or units or their interdependencies.

[0032] It should be noted that the terms "one" and "more" mentioned above are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0033] The above description is merely a selection of preferred embodiments of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments disclosed in this utility model is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A positive pressure filter with continuously switchable gas-liquid supply, characterized in that, The positive pressure filter is provided with an inlet valve pipe (205) on its top cover. One end of a hose (208) is connected inside the inlet valve pipe (205), and the other end of the hose (208) is connected to the outlet at the bottom of the telescopic sleeve (209). A telescopic groove (210) is provided at the center of the top end of the telescopic sleeve (209). An electric push rod (211) is fixed on one side of the top end of the telescopic sleeve (209). The top end of the electric push rod (211) is embedded in one side of the bottom end of the air inlet valve pipe (202), and an air inlet hole (212) is provided on the side of the bottom end of the air inlet valve pipe (202). The telescopic sleeve (209) opens and closes the air inlet hole (212) by telescopic extension.

2. The positive pressure filter with continuously switchable gas-liquid supply according to claim 1, characterized in that, The positive pressure filter includes a main frame (1), and a gas-liquid input cover (2) is fastened and fixed to the top of the main frame (1); the gas-liquid input cover (2) includes a top cover frame (201), an air inlet valve pipe (202) is fixed to the middle of the top of the top of the top cover frame (201), an air outlet valve pipe (203) is fixed to one side of the top surface of the top cover frame (201), a pressure gauge (204) is fixed to the top of the air outlet valve pipe (203), and an inlet liquid valve pipe (205) is fixed to the other side of the top surface of the top cover frame (201).

3. The positive pressure filter with continuously switchable gas-liquid supply according to claim 1 or 2, characterized in that, The inlet valve tube (205) has a control panel (206) and a battery module fixed on both sides outside the filter. The bottom end of the inlet valve tube (205) is fixed with a liquid level probe (207), which is electrically connected to the control panel (206) and the battery module.

4. The positive pressure filter with continuously switchable gas-liquid supply according to claim 2, characterized in that, The air inlet valve pipe (202), the air outlet valve pipe (203), and the liquid inlet valve pipe (205) are all fixedly connected to the top cover frame (201), and the bottom ends of the air inlet valve pipe (202), the air outlet valve pipe (203), and the liquid inlet valve pipe (205) are connected to the inside of the main frame (1).

5. The positive pressure filter with continuously switchable gas-liquid supply according to claim 1, characterized in that, The telescopic sleeve (209) is in telescopic cooperation with the bottom end of the intake valve pipe (202) through the telescopic groove (210), and the intake hole (212) is symmetrically opened and connected along both sides of the bottom end of the intake valve pipe (202).

6. The positive pressure filter with continuously switchable gas-liquid supply according to claim 3, characterized in that, The telescopic sleeve (209) forms a telescopic structure with the bottom end of the intake valve pipe (202) via an electric push rod (211), and the electric push rod (211) is electrically connected to the control panel (206) and the battery module.

7. The positive pressure filter with continuously switchable gas-liquid supply according to claim 2, characterized in that, The main frame (1) includes a cylindrical frame (101), with handles (102) fixed on the outer walls of both sides of the cylindrical frame (101), and retaining rings (103) fixed at the upper and lower ends of the cylindrical frame (101). A sealing ring (104) is embedded in the inner wall of the retaining ring (103), and lifting eye bolts (105) are distributed and connected around the retaining ring (103). A base (106) is engaged at the bottom of the cylindrical frame (101), and a discharge pipe (107) is connected to the center of the bottom end of the base (106). The top of the base (106) is installed on the filter plate, and support frames (108) are distributed around the bottom end of the base (106).

8. The positive pressure filter with continuously switchable gas-liquid supply according to claim 7, characterized in that, The bottom end of the support frame (108) is connected to casters (109).

9. The positive pressure filter with continuously switchable gas-liquid supply according to claim 7, characterized in that, The cylindrical frame (101) is fastened to the base (106) by a retaining ring (103), and the lifting bolts (105) are distributed in a ring around the outer wall of the retaining ring (103).

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