Positive pressure filter capable of continuously switching gas-liquid supply and working method thereof

Abstract

The invention discloses a positive pressure filter capable of continuously switching gas-liquid supply and a working method thereof, and belongs to the technical field of positive pressure filters, the positive pressure filter comprises a main frame, a gas-liquid input cover is fixed to the top end of the main frame in a buckled mode, the gas-liquid input cover comprises a top cover frame, and an air inlet valve pipe is fixed to 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] The present invention belongs to the technical field of positive pressure filters, and in particular relates to a positive pressure filter capable of continuously switching gas and liquid supply and a working method thereof. Background Art

[0002] Positive pressure filters, also known as small mechanical filters, are made of stainless steel. They are the preferred product for filtering liquids, clarifying and sterilizing in small units such as small pharmaceutical factories, food and beverage factories, mines, hospitals and laboratories. They are a device that achieves high-efficiency filtration by maintaining an internal pressure higher than the external environment. They are mainly used for the purification of liquids or gases. Their core function is to intercept impurities, ensure fluid cleanliness and prevent leakage of pollutants. With its high efficiency, pressure resistance and flexible adaptability, it has become a key equipment in the pharmaceutical, food, chemical and other fields.

[0003] The existing cylindrical positive pressure filter is mainly divided into three parts, including a top cover, a middle cylinder and a base. An air inlet and an air outlet are set on the top cover of the filter. The air outlet is also connected to a pressure gauge to keep control of the pressure of the filtration process. The filter plate is placed on the base, and different filter membranes can be laid on the filter plate as needed for filtering. During operation, after opening the top cover, pour the liquid to be filtered on the middle cylinder, and then close and fix the top cover. At this time, the three parts are assembled and sealed, and air is pressurized through an external air source, such as an air compressor or a pump, to continuously inject compressed air into the filter cavity in the filter to form an internal pressure environment higher than the ambient pressure, so that the pressure gradient pushes the fluid to be filtered to penetrate the filter membrane or filter cloth to complete the impurity retention. When the liquid inside the filter cavity is added after filtration, the eye bolts around the top cover need to be unscrewed and removed one by one before the liquid can be poured in again. This results in a lack of continuity in the liquid filtration process and requires more operating steps. In addition, the process of disassembling and adding is prone to the phenomenon of foreign impurities entering the filter cavity, affecting the filtration effect and causing quality problems. Summary of the Invention

[0004] The present invention provides a positive pressure filter capable of continuously switching gas and liquid supply and a working method thereof. After the filtration is completed, there is no need to remove the top cover to add filtered liquid, so the continuity of the filtration can be achieved and the operation is more convenient.

[0005] To achieve the above object, the present invention provides the following technical solutions: When the air is cooled, the vent is opened, the vent is opened, and the orifice of the inlet valve is fixed on the top of the inlet valve, and the orifice is opened and closed by the inlet valve.

[0006] In the above 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 inside of the main frame.

[0007] The control panel, the battery module and the liquid level probe are electrically connected, and the interior of the liquid inlet valve pipe is communicated with the bottom end of the telescopic sleeve through a hose.

[0008] The telescopic sleeve is telescopically matched with the bottom end of the intake valve pipe through the telescopic groove, and the intake holes are symmetrically opened and connected along both sides of the bottom end of the intake valve pipe.

[0009] The telescopic sleeve forms a telescopic structure with the bottom end of the intake valve pipe through an electric push rod, and the electric push rod is electrically connected to the control panel and the battery module.

[0010] The main frame includes a cylinder frame, handles are fixed on the outer walls of both sides of the cylinder frame, clamps are fixed on the upper and lower ends of the cylinder frame, a sealing rubber ring is embedded in the inner wall of the clamp, and hanging bolts are distributed and connected around the clamp, a base is clamped at the bottom of the cylinder frame, a discharge pipe is connected to the center of the bottom end of the base, support frames are distributed around the bottom end of the base, and the bottom end of the support frame is connected to a universal wheel.

[0011] The cylinder frame is buckled with the base through a clamping ring, and the eye bolts are distributed in a ring along the outer wall around the clamping ring.

[0012] When the above-mentioned positive pressure filter is working, the top end of the liquid inlet valve tube is connected to the external pump and the liquid containing carrier to be filtered through the pipeline structure, and the air inlet valve tube is connected to the external air pump structure. At this time, the bottom end of the inlet valve tube is telescopically connected to the telescopic sleeve, and the air inlet holes on both sides are also closed by the telescopic sleeve, while the air outlet valve tube remains open. At this time, the liquid can be input into the bottom end of the telescopic sleeve through the liquid inlet valve tube through the hose and discharged into the cavity. When the liquid position reaches the set threshold, the monitoring signal is transmitted to the control panel through the liquid level probe. At this time, the operator can stop the injection of liquid and then close the liquid inlet valve tube. At this time, the electric push rod can be controlled by the control panel to extend and expand the telescopic sleeve along the bottom end of the inlet valve tube to expose the air inlet holes on both sides. Then the air outlet valve tube is closed, and gas is injected through the air inlet holes and the external air pump to form internal positive pressure to assist the liquid in filtering. There is no need to manually disassemble the filter device to add filtered liquid or manually adjust the air pressure to stabilize the whole process.

[0013] Beneficial effects: The present invention provides a positive pressure filter capable of continuously switching gas and liquid supply and a working method thereof, which has the following advantages over the prior art: The positive pressure filter of the present invention is connected with carriers such as a pump and a filtered liquid pipeline through a liquid inlet valve tube built into the top cover frame, so that the flexible tube in the liquid inlet valve tube is pushed to the telescopic sleeve to complete the input of the liquid to be filtered. During the process, there is no need to remove the top cover frame body. According to needs, the telescopic sleeve connected to the electric push rod can be regulated to rise through the control panel to close the air inlet holes on both sides of the air inlet valve pipe, thereby maintaining a stable liquid supply process. The switching between liquid supply and air pressure supply is formed by telescopic regulation, thereby improving the filtration processing efficiency and avoiding the cumbersome process and the phenomenon of foreign impurities mixing into the cavity caused by the traditional dismantling method. When the liquid inlet valve pipe of the positive pressure filter of the present invention is supplying the liquid to be filtered, the liquid level can be monitored by a liquid level probe fixed integrally at the bottom end 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, which is convenient for the operator to control the set liquid level when inputting the liquid; The positive pressure filter of the present invention is composed of a cylindrical frame, a gas-liquid input cover on the top and a base at the bottom. They are engaged with each other through a snap ring and cooperate with a sealing rubber ring to maintain stable airtightness after closure. It can be disassembled by adjusting the hanging bolts around it. The gas-liquid input cover on the top can retain the detachable function while allowing for the input of filtered liquid, thereby facilitating subsequent cleaning operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the main frame of the present invention; Figure 2 This is a schematic diagram of the top view of the cylinder frame of the present invention; Figure 3This is a schematic diagram of the three-dimensional structure of the gas-liquid input cover of the present invention; Figure 4 This is a schematic diagram of the internal structure of the gas-liquid input cover from a side view of the present invention; Figure 5 This is a schematic diagram of the internal structure of the air inlet valve pipe in the gas-liquid input cover of the present invention from a side view; Figure 6 This is a schematic diagram of the filter plate structure inside the main frame of the present invention.

[0015] In the figure: 1. Main frame; 101. Cylinder frame; 102. Handle; 103. Snap ring; 104. Sealing rubber ring; 105. Eye bolt; 106. Base; 107. Discharge pipe; 108. Support frame; 109. Universal wheel; 2. Gas and liquid input cover; 201. Top cover; 202. Inlet valve pipe; 203. Outlet valve pipe; 204. Pressure gauge; 205. Liquid inlet valve pipe; 206. Control panel; 207. Liquid level probe; 208. Hose; 209. Telescopic sleeve; 210. Telescopic slot; 211. Electric push rod; 212. Air inlet hole. DETAILED DESCRIPTION

[0016] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments: like Figure 1-5 A positive pressure filter with continuously switchable gas and liquid supply is shown, comprising a main frame 1, a gas and liquid input cover 2 being fastened and fixed to the top of the main frame 1, the main frame 1 comprising a cylindrical frame 101, handles 102 being fixed to the outer walls on both sides of the cylindrical frame 101, a retaining ring 103 being fixed to the upper and lower ends of the cylindrical frame 101, a sealing rubber ring 104 being embedded in the inner wall of the retaining ring 103, and hanging bolts 105 being distributed and connected around the retaining ring 103, a base 106 being fastened to the bottom of the cylindrical frame 101, a filter plate being placed on the upper end of the base 106, a discharge pipe 107 being connected to the center of the bottom end, support frames 108 being distributed around the bottom end of the base 106, and a universal wheel 109 being connected to the bottom end of the support frame 108.

[0017] In order to facilitate the disassembly and cleaning of the entire filter and maintain the stability of the overall structure, such as Figure 1-2 As shown, this positive pressure filter is composed of a cylindrical frame 101, a gas-liquid input cover 2 on the top, and a base 106 on the bottom. They are engaged with each other through a snap ring 103 and cooperate with a sealing rubber ring 104 to maintain airtightness after closure. They can be disassembled by adjusting the eye bolts 105 around them. The gas-liquid input cover 2 on the top can retain the detachable function while being able to input filtered liquid, thereby facilitating subsequent cleaning operations.

[0018] 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 part 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 cover 201, a pressure gauge 204 is fixed to the top of the air outlet valve pipe 203, and a liquid inlet valve pipe 205 is fixed to the other side of the top of the top cover 201. A control panel 206 and a battery module are fixed on both sides of the liquid inlet valve pipe 205, and a liquid level probe 207 is fixed to the bottom end of the liquid inlet valve pipe 205. One end of the liquid inlet valve pipe 205 is connected to one end of the hose 208, and 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 provided at the center of the top of the telescopic sleeve 209, and 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 end of the air inlet valve pipe 202, and air inlet holes 212 are provided on both sides of the bottom end of the air inlet valve pipe 202.

[0019] In order to provide a rapid supply of filtrate, e.g. Figure 3-5 As shown, this positive pressure filter can be connected to carriers such as the pump and the filtered liquid pipeline through the liquid inlet valve tube 205 built into the top cover 201, so as to cooperate with the hose 208 in the liquid inlet valve tube 205 to push it to the liquid outlet at the bottom of the telescopic sleeve 209, thereby completing the input of the liquid to be filtered, and there is no need to remove the top cover frame 201 body during the process. According to needs, the telescopic sleeve 209 connected to the electric push rod 211 can be regulated to rise through the control panel 206 to close the air inlet holes 212 on both sides of the air inlet valve tube 202 to keep the liquid supply process stable. The switching between liquid supply and air pressure supply is formed through telescopic regulation, thereby improving the filtration processing efficiency and avoiding the cumbersome process and the phenomenon of external impurities mixing into the cavity caused by the traditional dismantling method.

[0020] When the liquid inlet valve tube 205 supplies filtered liquid, the liquid level can be monitored through the liquid level probe 207 fixed at the bottom to avoid the liquid level being too high affecting the use. The monitoring information can be transmitted to the control panel 206 in real time through the liquid level probe 207, which is convenient for the operator to control the set liquid level when inputting liquid.

[0021] When the above-mentioned positive pressure filter is in use, the clamping rings 103 fixed at the upper and lower ends of the cylindrical frame 101 between the filter are first buckled with the base 106 and the top cover 201, and then the eye bolts 105 arranged around the periphery are rotated and buckled with the corresponding clamping rings 103 of the base 106 and the top cover 201 and screwed. After the assembly is completed, the top end of the liquid inlet valve pipe 205 can be connected to the external pump and the liquid containing carrier to be filtered through the pipeline structure, and 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 telescopically connected to the telescopic sleeve 209, and the air inlet holes 212 on both sides are also closed by the telescopic sleeve 209, while the air outlet valve pipe 203 remains open. The liquid can be input into the bottom end of the telescopic sleeve 209 through the liquid inlet valve tube 205 through the hose 208 and discharged into the cavity. When the liquid position 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 injection of liquid and then close the liquid inlet valve tube 205. At this time, the electric push rod 211 can be controlled through the control panel 206 to extend and unfold the telescopic sleeve 209 along the bottom end of the air inlet valve tube 202 to expose the air inlet holes 212 on both sides. Then the air outlet valve tube 203 is closed, and gas is injected through the air inlet holes 212 and the external air pump to form an internal positive pressure to assist the liquid in filtering. There is no need to manually disassemble the filter device to add filtered liquid or manually adjust the air pressure to stabilize the whole process.

[0022] 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 or interdependence of the functions performed by these devices, modules or units. It should be noted that the modifications of "one" and "multiple" mentioned above are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0023] The above descriptions are merely some preferred embodiments disclosed herein and illustrate the underlying technical principles. Those skilled in the art should understand that the scope of the invention disclosed herein is not limited to technical solutions formed by specific combinations of the aforementioned technical features. It also encompasses other technical solutions formed by any combination of the aforementioned technical features or their equivalents, without departing from the aforementioned inventive concept. For example, a technical solution formed by replacing the aforementioned features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A positive pressure filter capable of continuously switching gas and liquid supply, characterized in that: A liquid inlet valve tube (205) is provided on the top cover of the positive pressure filter. The liquid inlet valve tube (205) is internally connected to one end of a hose (208). 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 provided at the center of the top end of the telescopic sleeve (209). An electric push rod (211) is fixed to 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 tube (202). An air inlet hole (212) is provided on the side of the bottom end of the air inlet valve tube (202). The telescopic sleeve (209) opens and closes the air inlet hole (212) by telescoping.

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

3. The positive pressure filter capable of continuously switching gas and liquid supply according to claim 1 or 2, characterized in that: A control panel (206) and a battery module are fixed to both sides of the liquid inlet valve tube (205) outside the filter, respectively. A liquid level probe (207) is fixed to the bottom end of the liquid inlet valve tube (205), and the liquid level probe (207) is electrically connected to the control panel (206) and the battery module.

4. The positive pressure filter capable of continuously switching gas and 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 in communication with the interior of the main frame (1).

5. The positive pressure filter capable of continuously switching gas and liquid supply according to claim 1, characterized in that: The telescopic sleeve (209) is telescopically matched with the bottom end of the air intake valve pipe (202) through the telescopic groove (210), and the air intake holes (212) are symmetrically opened and connected along both sides of the bottom end of the air intake valve pipe (202).

6. The positive pressure filter capable of continuously switching gas and liquid supply according to claim 3, characterized in that: The telescopic sleeve (209) forms a telescopic structure with the bottom end of the air intake valve pipe (202) through the 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 capable of continuously switching gas and liquid supply according to claim 2, characterized in that: 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), a sealing rubber ring (104) is embedded in the inner wall of the clamping ring (103), and hanging eye bolts (105) are distributed and connected around the clamping ring (103), a base (106) is engaged at the bottom of the cylindrical frame (101), 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 a support frame (108) is distributed around the bottom end of the base (106).

8. The positive pressure filter capable of continuously switching gas and liquid supply according to claim 7, characterized in that: The bottom end of the support frame (108) is connected to a universal wheel (109).

9. The positive pressure filter capable of continuously switching gas and liquid supply according to claim 7, characterized in that: The cylindrical frame (101) is fastened to the base (106) via a snap ring (103), and the eyebolts (105) are distributed in an annular manner along the outer wall around the snap ring (103).

10. The operating method of the positive pressure filter capable of continuously switching gas and liquid supply according to any one of claims 1 to 9, characterized in that: The following steps are involved: The liquid to be filtered is added to the filter through the liquid inlet valve pipe, and the liquid level is monitored by the liquid level probe and the monitoring signal is transmitted to the control panel for the user to monitor the liquid level in the filter at any time; During the filtration process, the electric push rod is controlled by the control panel to extend and retract the telescopic sleeve along the intake valve tube to control the opening and closing of the intake hole; the gas and liquid supply can be switched at any time according to needs or liquid level height. There is no need to manually disassemble the filter device to add filtered liquid or manually adjust the air pressure stability.

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