A pressure stabilizing filter device

Abstract

The utility model provides a kind of steady voltage filter device, it is related to negative pressure system technical field, the utility model provides a kind of steady voltage filter device including pump body, negative pressure tank, filter assembly, air extraction component, air inlet component and filling head;Pump body is communicated with negative pressure tank, filter assembly is installed in the inside of negative pressure tank and carries out filtration to the airflow that enters the inside of negative pressure tank;Air extraction component is communicated between negative pressure tank and filling head and is used to control the communication state of negative pressure tank and filling head, and the first filter piece is equipped in the end of air extraction component close to filling head;Air inlet component is communicated between filling head and atmosphere and is used to control the communication state of filling head and atmosphere, and the air inlet of air inlet component is equipped with second filter piece.The utility model provides a kind of steady voltage filter device, can reduce negative pressure fluctuation, guarantee the stability of equipment work, can also effectively intercept impurity, prolong equipment service life, improve the stability and reliability of equipment operation, reduce product complaint rate.

Description

Technical Field

[0001] This utility model relates to the field of negative pressure system technology, and in particular to a pressure stabilizing filter device. Background Technology

[0002] Filling machines, as key production equipment, are widely used in the quantitative packaging of various powders and granular materials. The core functional component of the filling machine, the negative pressure system, achieves precise material grasping and quantitative filling through vacuum adsorption, and its performance directly affects production efficiency and product quality. In actual operation, existing negative pressure systems have the following problems affecting filling efficiency.

[0003] First, the lag in the adjustment response of vacuuming and de-vacuuming causes significant negative pressure fluctuations during system switching, affecting the stability of the filling volume. Second, during de-vacuuming, outside air enters the system directly through the de-vacuuming valve. This air may carry dust, particles, and other impurities, which can then enter the filling head, affecting material cleanliness and potentially leading to customer complaints. Utility Model Content

[0004] The purpose of this utility model is to provide a pressure stabilizing filter device that can reduce negative pressure fluctuations, ensure the stability of equipment operation, effectively intercept impurities, extend equipment service life, improve the stability and reliability of equipment operation, and reduce product complaint rate.

[0005] To achieve the above objectives, this utility model provides the following technical solution: In a first aspect, this utility model provides a pressure stabilizing filter device, including a pump body, a negative pressure tank, a filter assembly, an air extraction assembly, an air inlet assembly, and a filling head; The pump body is connected to the negative pressure tank, and the filter assembly is installed inside the negative pressure tank to filter the airflow entering the negative pressure tank; The air extraction assembly is connected between the negative pressure tank and the filling head and is used to control the connection state between the negative pressure tank and the filling head. A first filter element is provided at one end of the air extraction assembly near the filling head. The air intake assembly is connected between the filling head and the atmosphere and is used to control the communication state between the filling head and the atmosphere. The air intake port of the air intake assembly is provided with a second filter.

[0006] In an optional embodiment, the filter assembly includes a filter bag, a support frame is provided inside the filter bag, the support frame is connected to the negative pressure tank, and the support frame has a hollow structure.

[0007] In an optional embodiment, the air extraction assembly includes a negative pressure pipeline, a first valve, and a first branch pipeline. The first valve is connected between the negative pressure pipeline and the first branch pipeline. The end of the negative pressure pipeline opposite to the first valve is connected to the filter assembly, and the end of the first branch pipeline opposite to the first valve is connected to the filling head.

[0008] In an optional embodiment, the negative pressure pipeline is connected to a pressure gauge.

[0009] In an optional embodiment, the air intake assembly includes an air intake pipe, a second valve, and a second branch pipe. The air intake pipe is connected between the second valve and the second branch pipe. The air inlet of the second valve is provided with the second filter element. The end of the second branch pipe opposite to the second valve is connected to the filling head.

[0010] In an optional embodiment, the pressure-stabilizing filter device further includes a diversion pipeline, through which both the air extraction assembly and the air intake assembly are connected to the filling head.

[0011] In an optional embodiment, the end of the branch line near the filling head has a main line, and the main line is provided with a flow regulator.

[0012] In an optional embodiment, the end of the suction assembly near the filling head is provided with a one-way valve that allows gas in the filling head to enter the suction assembly in one direction.

[0013] In an optional embodiment, the one-way valve is integrated with the first filter element.

[0014] In an optional embodiment, the negative pressure tank is provided with a viewing door.

[0015] The pressure-stabilizing filter device provided by this utility model can produce the following beneficial effects: When the pressure-stabilizing filter device provided by this utility model is in use, the pump body operates, and the gas inside the equipment can enter the suction assembly from the filling head. After being filtered by the first filter element on the suction assembly, it enters the negative pressure tank. In the negative pressure tank, it is filtered again by the filter assembly and then pumped into the pump body, thereby creating a negative pressure inside the equipment. At this time, the air intake assembly always disconnects the filling head from the atmosphere. When it is necessary to disrupt the negative pressure state inside the equipment, the connection between the negative pressure tank and the filling head can be disconnected by the suction assembly, and the filling head can be connected to the atmosphere by the air intake assembly. The air is filtered by the second filter element and then enters the equipment through the air intake assembly and the filling head.

[0016] Compared with existing technologies, the pressure stabilizing filter device provided by this utility model reduces negative pressure fluctuations by setting a negative pressure tank, ensuring the stability of equipment operation. In addition, it effectively intercepts impurities by setting multiple filtration mechanisms, extending the service life of the equipment, improving the stability and reliability of equipment operation, and reducing the product complaint rate. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 Schematic diagram of the voltage stabilizing filter device provided in the embodiment of this utility model Figure 1 ; Figure 2 Schematic diagram of the voltage stabilizing filter device provided in the embodiment of this utility model Figure 2 .

[0019] Icons: 1-Pump body; 2-Negative pressure tank; 21-Visual door; 3-Filter assembly; 31-Filter bag; 4-Air extraction assembly; 41-Negative pressure pipeline; 42-First valve; 43-First branch pipeline; 5-Inlet assembly; 51-Inlet pipe; 52-Second valve; 53-Second branch pipeline; 6-Filling head; 7-Second filter element; 8-Support frame; 9-Pressure gauge; 10-Diverter pipeline; 101-Main pipeline; 102-Flow regulator; 011-Check valve. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0024] The first aspect of this utility model provides a pressure-stabilizing filter device, such as... Figure 1 and Figure 2 As shown, it includes a pump body 1, a negative pressure tank 2, a filter assembly 3, an air extraction assembly 4, an air intake assembly 5, and a filling head 6; Pump body 1 is connected to negative pressure tank 2, and filter assembly 3 is installed inside negative pressure tank 2 to filter the airflow entering negative pressure tank 2; The air extraction component 4 is connected between the negative pressure tank 2 and the filling head 6 and is used to control the connection state between the negative pressure tank 2 and the filling head 6. The end of the air extraction component 4 near the filling head 6 is provided with a first filter element. The intake assembly 5 is connected between the filling head 6 and the atmosphere and is used to control the communication state between the filling head 6 and the atmosphere. The intake assembly 5 is provided with a second filter element 7.

[0025] When using the voltage stabilizing filter device provided in the above embodiments, such as Figure 1 As shown, when pump body 1 is working, the gas inside the equipment can enter the suction assembly 4 from the filling head 6, and after being filtered by the first filter element on the suction assembly 4, it enters the negative pressure tank 2. Inside the negative pressure tank 2, it is filtered again by the filter assembly 3 before being pumped into pump body 1, thus creating a negative pressure inside the equipment. At this time, the air intake assembly 5 always disconnects the filling head 6 from the atmosphere. When it is necessary to disrupt the negative pressure state inside the equipment, such as... Figure 2 As shown, the connection between the negative pressure tank 2 and the filling head 6 can be canceled by the air extraction component 4, and the filling head 6 can be connected to the atmosphere by the air intake component 5. The air is filtered by the second filter element 7 and then enters the equipment through the air intake component 5 and the filling head 6.

[0026] Compared with the prior art, the pressure stabilizing filter device provided in the above embodiment is equipped with a negative pressure tank 2. The negative pressure tank 2 serves as a pressure buffer chamber, which can absorb the instantaneous flow fluctuations caused by the intermittent operation of the pump body 1 or load changes, thereby reducing the negative pressure fluctuations during the formation of negative pressure in the equipment. In addition, by setting up multiple filtration mechanisms, impurities are effectively intercepted, extending the service life of the equipment, improving the stability and reliability of equipment operation, and reducing the product complaint rate.

[0027] The above-mentioned equipment can be, but is not limited to, a filling machine. In actual use, it can ensure that the negative pressure range of the filling machine is stable between -55 and -65 kPa.

[0028] It should be noted that any structure capable of filtering the airflow entering the negative pressure tank 2 can be the filter component 3 mentioned in the above embodiments, such as filter screen or filter bag.

[0029] In an optional embodiment, the filter assembly 3 includes a filter bag 31, which is disposed inside the negative pressure tank 2 and is used to perform secondary filtration on the gas flowing through the negative pressure tank 2 to further remove residual particulate impurities in the gas and improve the purification efficiency of the system. To ensure that the filter bag 31 maintains a stable shape under the action of airflow and to prevent collapse or deformation, a support frame 8 is provided inside the filter bag 31. The support frame 8 is fixedly connected to the inner wall of the negative pressure tank 2, thereby providing structural support for the filter bag 31.

[0030] Among them, the filter bag 31 can be made of polyester fiber with a mesh size of 100 to 200.

[0031] Furthermore, the support frame 8 adopts a hollow structure design, which allows gas to pass through the filter bag 31 evenly, avoiding local airflow concentration that could lead to decreased filtration efficiency or damage to the filter bag.

[0032] Through the above structural design, the filter component 3 not only has good filtration performance, but also maintains structural stability during long-term operation, avoiding filtration failure caused by deformation of the filter material, thereby effectively improving the operational stability and service life of the entire pressure stabilizing filter device.

[0033] In alternative implementations, such as Figure 1 As shown, the air extraction assembly 4 includes a negative pressure pipeline 41, a first valve 42, and a first branch pipeline 43.

[0034] One end of the negative pressure pipeline 41 is connected to the filter assembly 3, and the other end is connected to the first valve 42. The first valve 42, as a control element, is located between the negative pressure pipeline 41 and the first branch pipeline 43, and can switch the on / off state according to the control signal or manual operation. When the first valve 42 is open, the negative pressure pipeline 41 and the first branch pipeline 43 form a communication channel, and the end of the first branch pipeline 43 away from the first valve 42 is connected to the filling head 6, so that airflow is conducted between the filling head 6 and the filter assembly 3; when the first valve 42 is closed, the channel between the negative pressure pipeline 41 and the first branch pipeline 43 is blocked, thereby isolating the gas flow between the filling head 6 and the filter assembly 3.

[0035] During the air extraction process, such as Figure 1 As shown, the gas sequentially passes through the first branch pipe 43, the first valve 42 and the negative pressure pipe 41 into the filter assembly 3, and after filtration, it enters the negative pressure tank 2, and then enters the pump body 1, thus forming a complete negative pressure circulation path.

[0036] In addition, the first filter element is set at one end of the first branch pipe 43 near the filling head 6. The first filter element is used to intercept impurity particles and materials that may enter the air extraction component 4 with the airflow, preventing impurities and materials from entering the negative pressure tank 2 or the pump body 1, avoiding pipe blockage and equipment wear, thereby improving the stability and service life of the entire device.

[0037] Therefore, the above embodiment achieves precise control over the airflow between the filling head 6 and the filter assembly 3 by setting up an air extraction assembly 4 consisting of a negative pressure pipeline 41, a first valve 42, and a first branch pipeline 43. During equipment operation, the negative pressure connection between the filling head 6 and the negative pressure tank 2 can be selectively established or cut off by controlling the opening and closing state of the first valve 42, thereby flexibly adjusting the working state of the equipment.

[0038] The first valve 42 can be a solenoid valve, a pneumatic valve, or a manual ball valve, etc. Preferably, the first valve 42 is a vacuum angle seat valve.

[0039] The aforementioned negative pressure pipeline 41 and the first branch pipeline 43 can be made of flexible hoses or rigid metal pipes, and the specific materials can be selected according to the needs.

[0040] In an optional embodiment, the negative pressure pipeline 41 is connected to a pressure gauge 9, which is used to monitor the negative pressure status in the negative pressure pipeline 41 in real time, thereby providing operators with intuitive pressure readings and ensuring that the equipment operates stably within the set negative pressure range.

[0041] The pressure gauge can be a digital pressure transmitter.

[0042] In addition, the pressure gauge 9 can be electrically connected to a control system (such as a PLC or control cabinet) to achieve automatic monitoring and alarm functions for negative pressure conditions. For example, when the detected negative pressure value exceeds the set threshold, the system can automatically trigger an alarm or shut down the equipment to ensure operational safety and process stability.

[0043] In an optional embodiment, the air intake assembly 5 includes an air intake pipe 51, a second valve 52, and a second branch pipe 53. The air intake pipe 51 is connected between the second valve 52 and the second branch pipe 53. The air inlet of the second valve 52 is provided with a second filter element 7. The end of the second branch pipe 53 opposite to the second valve 52 is connected to the filling head 6.

[0044] In practical operation, when the system needs to release the negative pressure state, such as Figure 2 As shown, the control system controls the second valve 52 to open, while the first valve 42 in the air extraction assembly 4 closes, thus cutting off the passage between the negative pressure tank 2 and the filling head 6. At this time, external air passes through the second valve 52 and the air inlet pipe 51 in sequence, and after being filtered by the second filter element 7, it enters the filling head 6 through the second branch pipe 53.

[0045] Through the above structural design, the air intake component 5 not only achieves the controllable release of the negative pressure state of the system, but also effectively intercepts impurities in the external air by setting the second filter element 7, thereby improving the operational stability and service life of the entire pressure stabilizing filter device.

[0046] The second filter element 7 can be an air filter with a filtration accuracy of not less than 5μm.

[0047] In addition, the second valve 52 can be a solenoid valve, a pneumatic valve or a manual ball valve, etc. Preferably, the second valve 52 is a vacuum-breaking angle seat valve.

[0048] The aforementioned intake pipe 51 and second branch pipe 53 can be made of flexible tubing or rigid tubing made of metal, and the specific material can be selected according to the needs.

[0049] The second filter element 7 can be made of materials with excellent filtration performance, such as polymer filter membranes, metal filter screens, or porous sintered materials. Its pore size can be selected according to the actual application scenario to meet different cleanliness requirements.

[0050] In alternative implementations, such as Figure 1 and Figure 2 As shown, the pressure stabilizing filter also includes a diversion pipe 10, and the air extraction component 4 and the air intake component 5 are both connected to the filling head 6 through the diversion pipe 10.

[0051] Specifically, the diversion pipeline 10 has a main pipeline 101 and two branch pipelines. The main pipeline 101 is connected to the filling head 6, and the two branch pipelines are connected to the suction assembly 4 and the air intake assembly 5, respectively, so that the suction assembly 4 and the air intake assembly 5 can work together on the filling head 6 through the diversion pipeline 10.

[0052] like Figure 1 and Figure 2 As shown, the diversion pipe 10 preferably adopts a Y-shaped pipe structure. The two arms of the Y-shaped pipe are respectively connected to the first branch pipe 43 of the suction assembly 4 and the second branch pipe 53 of the intake assembly 5. The main pipe 101 in the Y-shaped pipe is connected to the filling head 6, thereby forming a "Y"-shaped fluid channel in structure, realizing the centralized convergence and switching control of the suction path and the intake path at the filling head 6.

[0053] The structural design of the Y-type diversion pipeline 10 not only simplifies the layout of the overall pipeline system, reduces the number of pipeline interfaces, and lowers the risk of leakage, but also facilitates the rapid switching between the air extraction path and the air intake path, improving the convenience and response speed of equipment operation.

[0054] In alternative implementations, such as Figure 1 and Figure 2 As shown, the main pipeline 101 is equipped with a flow regulating component 102.

[0055] By setting the flow regulating component 102, the gas flow rate extracted from the filling head 6 can be precisely controlled when the air extraction component 4 is working, so as to avoid negative pressure fluctuations caused by excessive gas flow rate; when the air intake component 5 is working, the air flow rate entering the filling head 6 can also be controlled, further improving the pressure stability of the entire pressure stabilizing filter device.

[0056] The aforementioned flow regulator 102 can be a knob-type manual or automatic regulating valve, such as a needle valve, ball valve, electric regulating valve, or pneumatic control valve, used to regulate the gas flow rate through the main pipeline 101. This flow regulator 102 is located on the gas flow path in the main pipeline 101 and can precisely control the gas flow rate according to actual working requirements, thereby achieving fine-tuning control of the internal pressure of the filling head 6.

[0057] In an optional embodiment, the end of the air extraction assembly 4 near the filling head 6 is provided with a one-way valve 011 that allows gas in the filling head 6 to enter the air extraction assembly 4 in one direction, thereby preventing the backflow of external gas or internal airflow when the air extraction assembly 4 stops working or the internal pressure of the negative pressure tank 2 changes, which would affect the stability of the negative pressure in the equipment.

[0058] Specifically, the one-way valve 011 is located at the end of the first branch pipe 43 of the vacuum assembly 4 near the filling head 6. Its structure can be a spring-loaded or gravity-operated one-way valve, including components such as a valve body, a valve core, and a return spring. When the vacuum assembly 4 is working, the airflow pressure generated inside the filling head 6 overcomes the spring force or gravity, pushing the valve core to open, allowing gas to smoothly enter the vacuum assembly 4. When the vacuum assembly 4 stops working, the one-way valve 011 automatically closes, preventing gas from flowing backward, thereby maintaining the sealing of the connection area between the filling head 6 and the vacuum assembly 4, and preventing external impurities or air from flowing back into the system.

[0059] In an optional embodiment, the one-way valve 011 is integrated with the first filter element, for example, the combined structure of the two is a one-way filter valve.

[0060] Specifically, the one-way filter valve may include a filter body with vent holes, which has a filter media layer inside for efficient gas filtration; a resilient valve plate that can be opened and closed is provided on one side of the filter body. Under normal gas extraction conditions, the valve plate automatically opens due to the pressure difference, allowing gas to pass through; when the gas extraction assembly 4 stops working, due to changes in external air pressure or pressure in the negative pressure tank 2, the valve plate automatically closes under the action of the pressure difference or spring return force, thereby preventing gas backflow.

[0061] In an optional embodiment, the negative pressure tank 2 is provided with a viewing door 21, which can be set on the side wall or top of the negative pressure tank 2 for observing the working status inside the negative pressure tank 2, including the gas flow, the working status of the filter assembly 3, and whether there is liquid accumulation or impurity buildup inside the tank.

[0062] The aforementioned viewing door 21 may include a transparent observation window and a sealing structure for fixing the observation window. The transparent observation window is made of a high-strength transparent material (such as tempered glass or transparent engineering plastic), which has good pressure resistance and chemical stability, and can maintain structural integrity under negative pressure. The sealing structure adopts a combination of a rubber sealing ring and a metal clamping flange to ensure that the viewing door 21 has good airtightness under negative pressure operation.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pressure-stabilizing filter device, characterized in that, It includes a pump body (1), a negative pressure tank (2), a filter assembly (3), an air extraction assembly (4), an air intake assembly (5), and a filling head (6); The pump body (1) is connected to the negative pressure tank (2), and the filter assembly (3) is installed inside the negative pressure tank (2) to filter the airflow entering the negative pressure tank (2); The air extraction component (4) is connected between the negative pressure tank (2) and the filling head (6) and is used to control the connection state between the negative pressure tank (2) and the filling head (6). The air extraction component (4) is provided with a first filter element at one end near the filling head (6). The air intake assembly (5) is connected between the filling head (6) and the atmosphere and is used to control the communication state between the filling head (6) and the atmosphere. The air intake assembly (5) is provided with a second filter (7).

2. The pressure-stabilizing filter device according to claim 1, characterized in that, The filter assembly (3) includes a filter bag (31), and a support frame (8) is provided inside the filter bag (31). The support frame (8) is connected to the negative pressure tank (2), and the support frame (8) has a hollow structure.

3. The pressure-stabilizing filter device according to claim 1, characterized in that, The air extraction assembly (4) includes a negative pressure pipeline (41), a first valve (42) and a first branch pipeline (43). The first valve (42) is connected between the negative pressure pipeline (41) and the first branch pipeline (43). The end of the negative pressure pipeline (41) away from the first valve (42) is connected to the filter assembly (3), and the end of the first branch pipeline (43) away from the first valve (42) is connected to the filling head (6).

4. The pressure-stabilizing filter device according to claim 3, characterized in that, The negative pressure pipeline (41) is connected to a pressure gauge (9).

5. The pressure-stabilizing filter device according to claim 1, characterized in that, The air intake assembly (5) includes an air intake pipe (51), a second valve (52), and a second branch pipe (53). The air intake pipe (51) is connected between the second valve (52) and the second branch pipe (53). The air inlet of the second valve (52) is provided with the second filter element (7). The end of the second branch pipe (53) away from the second valve (52) is connected to the filling head (6).

6. The pressure-stabilizing filter device according to claim 5, characterized in that, The pressure stabilizing filter device also includes a diversion pipe (10), and the air extraction component (4) and the air intake component (5) are both connected to the filling head (6) through the diversion pipe (10).

7. The pressure-stabilizing filter device according to claim 6, characterized in that, The branch pipe (10) has a main pipe (101) at one end near the filling head (6), and the main pipe (101) is provided with a flow regulator (102).

8. The pressure-stabilizing filter device according to any one of claims 1-7, characterized in that, The pumping assembly (4) is provided with a one-way valve (011) at one end near the filling head (6) to allow gas in the filling head (6) to enter the pumping assembly (4) in one direction.

9. The pressure-stabilizing filter device according to claim 8, characterized in that, The one-way valve (011) is integrated with the first filter element.

10. The pressure-stabilizing filter device according to any one of claims 1-7, characterized in that, The negative pressure tank (2) is equipped with a visible door (21).

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