Multi-connected needle type filter

Abstract

The invention discloses a multi-connection needle type filter, and relates to the technical field of filtering equipment. The device comprises a bottom pipe and a clamping assembly, multiple sets of support pipes are arranged at the top of the bottom pipe, valves and flow sensors are arranged in the support pipes from top to bottom, silica gel plugs are arranged at the tops of the support pipes, needle type filter elements are inserted into the silica gel plugs in a sealed mode, and filter cups are arranged at the tops of the needle type filter elements. A multi-connected filter pressure balance assembly is arranged at the top of the filter cup and can be matched with the filter resistance of the corresponding needle type filter element. Through the design of the multi-union filter pressure balance assembly and the flow sensor, the filtering speeds of different samples under the same air pressure can be detected, and the multi-union filter pressure balance assembly simulates the filtering damping while blocking the communication between the filter cup and the outside according to the feedback of the filtering speed, so that the remaining filters can still continuously and stably filter, and the filtering efficiency is improved. The device is suitable for filtering a plurality of samples with large speed difference.

Description

Technical Field

[0001] The present invention relates to the technical field of filtering devices, and particularly relates to a multi - needle filter. Background Art

[0002] The multi - filter is mainly used for the filtration detection of packaged drinking water in food detection. It uses a stainless - steel pipe with one end closed and the other end connected to a vacuum pump. Six filter cups are arranged side by side and sealed on the stainless - steel pipe. By using the vacuum pump to extract the air inside the stainless - steel pipe from one end, its inner cavity is in a vacuum state. Then, the one - way valve is opened to connect the filter cup with the vacuum stainless - steel pipe, so that a pressure difference is generated between the inside of the filter cup and the stainless - steel pipe, and the water in the filter cup is sucked back into the glass bottle connected to the outlet of the stainless - steel pipe, thus achieving the purpose of filtering and collecting pollutants in the water quality, and multiple samples can be filtered simultaneously.

[0003] In the utility model patent (publication number: CN203710791U), a multi - filter is disclosed, which includes a filter support composed of a stainless - steel vacuum tube for air pressure transmission, a stainless - steel filter cup sealed and docked with the filter support through a fixing clip, and a vacuum pump connected to the air outlet of the filter support. A liquid collection bottle is also sealed and connected between the air outlet of the filter support and the vacuum pump. The filter support is composed of a horizontal tube and a vertical tube, and the filter support is in a T - shape. The vertical tube extends from the center of the horizontal tube. The two ends of the horizontal tube are sealed, and the stainless - steel filter cups are symmetrically distributed on the horizontal tube.

[0004] The following technical problems exist in the actual use of this patent and the prior art: When processing multiple samples, only products with similar filtration speeds can be processed. If the sample in one of the filters has too fast a filtration speed, this filter will directly connect the entire filtration system to the outside world, resulting in the inability to effectively continue filtering subsequent samples, thereby affecting the scope of application of the multi - filter. Summary of the Invention

[0005] The purpose of the present invention is: to solve the above problems, the present invention provides a multi - needle filter.

[0006] The present invention specifically adopts the following technical solutions to achieve the above purpose: A multi - needle filter includes a bottom tube and a clamping assembly. Multiple support tubes are arranged at the top of the bottom tube. A valve and a flow sensor are arranged inside the support tube from top to bottom. The handles of multiple valves are connected through a sleeve rod. A silica gel plug is arranged at the top of the support tube. A needle - type filter element is hermetically inserted into the silica gel plug. A filter cup is arranged at the top of the needle - type filter element. The needle - type filter element and the filter cup are fixed together by a clamping assembly; A multi - connection filter pressure balance component is provided at the top of the filter cup, and the multi - connection filter pressure balance component can match the filtration resistance of the corresponding needle - type filter element according to the feedback of the flow sensor.

[0007] Further, the clamping component is composed of an upper clamping plate and a lower clamping plate that are hinged to each other. A clamping spring is arranged between the upper clamping plate and the lower clamping plate. Clamping rings are arranged at the top of the needle - type filter element and the bottom of the filter cup, and the upper clamping plate and the lower clamping plate can hermetically clamp the two groups of clamping rings together.

[0008] Further, the multi - connection filter pressure balance component includes two inner guide bars fixedly installed on the inner wall of the filter cup. A top ring is fixedly installed at the top of the two inner guide bars at the same time. Two groups of sliding holes are opened inside the top ring, and sliding columns are inserted into the sliding holes. The bottoms of the two groups of sliding columns are fixedly installed with a piston disk at the same time. A guide groove is opened on the outer side of the piston disk, and the inner guide bar is hermetically slidably connected in the guide groove. A rubber sealing strip is arranged on the outer side of the piston disk, and an adjusting protrusion is arranged in the middle of the rubber sealing strip. The frictional damping between the adjusting protrusion and the inner wall of the filter cup can be automatically adjusted according to the feedback of the flow sensor.

[0009] Further, an inner groove is opened at the top of the piston disk, adjusting holes are opened on the inner wall of the inner groove, the adjusting protrusion is inserted into the adjusting holes, two first air holes are penetrated and opened at the inner bottom of the inner groove, an adjusting disk is rotatably installed inside the inner groove, two second air holes are penetrated and opened inside the adjusting disk, two arc - shaped adjusting grooves are opened at the top of the adjusting disk, an adjusting top rod is slidably connected inside the adjusting hole, a transmission protrusion is arranged at the bottom of the adjusting top rod, and the transmission protrusion is inserted into the arc - shaped adjusting groove. When the axes of the second air hole and the first air hole coincide, there is a closed spacing between the adjusting top rod and the adjusting protrusion.

[0010] Further, a worm is rotatably installed at the top of the piston disk, a worm gear is arranged at the top of the adjusting disk, and the worm gear meshes with the worm.

[0011] Further, a mounting bracket is arranged at the top of the piston disk, an adjusting air cylinder is fixedly installed inside the mounting bracket, a piston rod is slidably connected inside the adjusting air cylinder, a toothed rod is arranged at the end of the piston rod away from the adjusting air cylinder, a tension spring is arranged between the piston rod and the inner wall of the adjusting air cylinder, a gear is arranged at the end of the worm close to the adjusting air cylinder, the gear meshes with the toothed rod, the adjusting air cylinder is communicated with a vacuum pump through an air pipe and a solenoid valve, the air pipe connection position is close to the worm, and a controller is arranged on the outer side of the bottom pipe. The controller receives the flow sensor and controls the opening time of the corresponding solenoid valve according to the flow signal.

[0012] Further, a connecting rod is arranged at the top of the sliding column, and the connecting rods on adjacent multi - connection filter pressure balance components are connected by a lifting rope.

[0013] Further, bottom support plates are provided at both ends of the bottom pipe, and handle grooves are formed inside the bottom support plates.

[0014] Further, detachable joints are threadedly connected to both ends of the bottom pipe.

[0015] The beneficial effects of the present invention are as follows: 1. Through the design of the multi-connected filter pressure balance assembly and the flow sensor, the present invention can detect the filtration speeds of different samples under the same air pressure. Moreover, according to the feedback of the filtration speed, the multi-connected filter pressure balance assembly blocks the connection between the filter cup and the outside world while simulating the filtration damping, enabling the remaining filters to still continuously and stably perform filtration. It can be applicable to multiple samples with large differences in filtration speed, and has a wide range of applications.

[0016] 2. The multi-connected needle filter of the present invention adopts a modular structure design, which can quickly realize the replacement and maintenance of the needle filter element, greatly improving the continuous use efficiency of the filter. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is an exploded view of the overall structure of the present invention; Figure 3 is a schematic diagram of the structure of the multi-connected filter pressure balance assembly of the present invention; Figure 4 is an exploded view of the multi-connected filter pressure balance assembly of the present invention; Figure 5 is a schematic diagram of the structure of the piston disc of the present invention; Figure 6 is a schematic diagram of the structure of the adjustment disc of the present invention.

[0018] Reference Numerals: 1, bottom pipe; 2, bottom support plate; 3, support pipe; 31, valve; 32, flow sensor; 33, sleeve rod; 4, silicone plug; 5, needle filter element; 6, filter cup; 7, multi-connected filter pressure balance assembly; 71, inner guide bar; 72, top ring; 73, sliding column; 74, piston disc; 741, guide groove; 742, first air hole; 743, adjustment hole; 744, mounting bracket; 75, adjustment disc; 751, second air hole; 752, arc adjustment groove; 753, worm gear; 76, rubber sealing strip; 761, adjustment protrusion; 77, adjustment top rod; 771, transmission protrusion; 78, worm; 79, gear; 710, adjustment air cylinder; 711, toothed rod; 8, lifting rope; 9, upper clamping plate; 10, lower clamping plate; 11, clamping spring. Detailed Embodiments

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0020] Example 1, as Figures 1 - 6 shown, a multi - needle filter includes a bottom tube 1 and a clamping assembly. At the top of the bottom tube 1, there are multiple groups of support tubes 3. Inside the support tube 3, a valve 31 and a flow sensor 32 are arranged from top to bottom. The handles of multiple groups of valves 31 are connected by a sleeve rod 33. At the top of the support tube 3, there is a silicone plug 4. Inside the silicone plug 4, a needle filter element 5 is hermetically inserted. At the top of the needle filter element 5, there is a filter cup 6. The needle filter element 5 and the filter cup 6 are fixed together by a clamping assembly; At the top of the filter cup 6, there is a multi - filter pressure balance assembly 7. The multi - filter pressure balance assembly 7 can match the filtration resistance of the corresponding needle filter element 5 according to the feedback of the flow sensor 32.

[0021] Furthermore, bottom support plates 2 are arranged at both ends of the bottom tube 1. Inside the bottom support plates 2, there are handle grooves, which not only provide support for the device but also facilitate the handling of the device.

[0022] Even further, detachable connectors are thread - connected to both ends of the bottom tube 1, which can quickly replace the connectors and are suitable for different pipeline connections.

[0023] Assembly: Install the silicone plug 4 on the support tube 3, and then install the needle filter element 5 in the silicone plug 4 to achieve a quick sealed connection between the needle filter element 5 and the support tube 3. Then use the clamping assembly to hermetically clamp the filter cup 6 on the needle filter element 5 to complete the quick assembly of the device. With a modular design, the replacement and maintenance of the needle filter element can be quickly realized, greatly improving the continuous use efficiency of the filter.

[0024] During use, pour the sample into the filter cup 6, connect the bottom tube 1 to the collection bottle, and then use a vacuum pump to create a vacuum in the bottom tube 1 and the collection bottle. If it is single - controlled, do not install the sleeve rod 33 on the handle of the valve 31, and the corresponding valve 31 can be individually opened to process a single sample; When it is necessary to filter multiple samples of the same type but with significantly different filtration speeds, the handles of multiple valves 31 are connected together by a sleeve rod 33. During filtration, all valves 31 are opened simultaneously, and multiple samples are filtered at the same time. Under the action of vacuum negative pressure, the samples in the filter cup 6 enter the support tube 3 through the needle filter element 5. The flow sensor 32 detects the filtration speed of the filter. The information after 1 second is recorded in the controller. Then, the filtrate enters the collection bottle through the bottom tube 1. When the flow sensor 32 in the filter that completes filtration first detects no flow, the multi-connected filter pressure balance assembly 7 seals the filter cup 6. At the same time, according to the recorded information, the controller adjusts the filtration resistance of the corresponding needle filter element 5. At this time, the multi-connected filter pressure balance assembly 7 mimics the filtration resistance in the filter cup 6, so that the filter cup 6 that has completed filtration neither contacts the outside world nor completely seals, resulting in excessive filtration pressure in other filter cups 6, thereby ensuring the overall filtration stability. The subsequent filters that complete filtration are also operated according to the above steps to ensure stable filtration until the last one.

[0025] Embodiment 2, on the basis of the above embodiment, further includes that the clamping assembly is composed of an upper clamping plate 9 and a lower clamping plate 10 that are hinged to each other. A clamping spring 11 is arranged between the upper clamping plate 9 and the lower clamping plate 10. Clamping rings are arranged at the top of the needle filter element 5 and the bottom of the filter cup 6, and the upper clamping plate 9 and the lower clamping plate 10 can seal and clamp the two groups of clamping rings together.

[0026] By pinching the handles of the upper clamping plate 9 and the lower clamping plate 10 to expand the upper clamping plate 9 and the lower clamping plate 10, the disassembly of the needle filter element 5 and the filter cup 6 can be quickly completed.

[0027] Embodiment 3, on the basis of the above embodiment, further includes that the multi-connected filter pressure balance assembly 7 includes two inner guide bars 71 fixedly installed on the inner wall of the filter cup 6. A top ring 72 is fixedly installed at the top of the two inner guide bars 71 at the same time. Two groups of sliding holes are opened inside the top ring 72, and sliding columns 73 are inserted into the sliding holes. A piston disc 74 is fixedly installed at the bottom of the two groups of sliding columns 73 at the same time. A guide groove 741 is opened on the outer side of the piston disc 74, and the inner guide bar 71 is hermetically slidably connected in the guide groove 741. A rubber sealing strip 76 is arranged on the outer side of the piston disc 74, and an adjustment protrusion 761 is arranged in the middle of the rubber sealing strip 76. The frictional damping between the adjustment protrusion 761 and the inner wall of the filter cup 6 can be automatically adjusted according to the feedback of the flow sensor 32; The top of the piston disc 74 is provided with an inner groove, the inner wall of the inner groove is provided with an adjustment hole 743, the adjustment protrusion 761 is inserted into the adjustment hole 743, two first air holes 742 are penetratingly opened at the inner bottom of the inner groove, an adjustment disc 75 is rotatably installed inside the inner groove, two second air holes 751 are penetratingly opened inside the adjustment disc 75, two arc-shaped adjustment grooves 752 are opened at the top of the adjustment disc 75, an adjustment ejector rod 77 is slidably connected inside the adjustment hole 743, a transmission protrusion 771 is arranged at the bottom of the adjustment ejector rod 77, and the transmission protrusion 771 is inserted into the arc-shaped adjustment groove 752. When the axes of the second air hole 751 and the first air hole 742 coincide, there is a closed spacing between the adjustment ejector rod 77 and the adjustment protrusion 761; A worm 78 is rotatably installed at the top of the piston disc 74, a worm gear 753 is arranged at the top of the adjustment disc 75, and the worm gear 753 meshes with the worm 78; An installation frame 744 is arranged at the top of the piston disc 74, an adjustment air cylinder 710 is fixedly installed inside the installation frame 744, a piston rod is slidably connected inside the adjustment air cylinder 710, a rack 711 is arranged at one end of the piston rod far away from the adjustment air cylinder 710, a tension spring is arranged between the piston rod and the inner wall of the adjustment air cylinder 710, a gear 79 is arranged at one end of the worm 78 close to the adjustment air cylinder 710, the gear 79 meshes with the rack 711, the adjustment air cylinder 710 is communicated with a vacuum pump through a trachea and a solenoid valve, the connection position of the trachea is close to the worm 78, a controller is arranged outside the bottom pipe 1, the controller receives the flow sensor 32 and controls the opening time of the corresponding solenoid valve according to the flow signal.

[0028] This embodiment is a specific multi-stage filter pressure balance assembly 7 structure. The flow sensor 32 detects the filtration speed of the filter, and records the information after 1 second in the controller. Then the filtrate enters the collection bottle through the bottom pipe 1. When the flow sensor 32 in the filter that has completed filtration detects no flow, according to the recorded information, the controller controls the opening time of the solenoid valve, so that negative pressure is generated in the adjustment air cylinder 710. The negative pressure drives the piston rod to extend. The piston rod drives the gear 79 to rotate through the rack 711. The gear 79 drives the worm 78 to rotate. The worm 78 drives the adjustment disc 75 to rotate through the worm gear 753. The adjustment disc 75 drives the second air hole 751 to be displaced from the first air hole 742, realizing the sealing of the filter cup 6. At the same time, the adjustment disc 75 drives the adjustment ejector rod 77 to slide through the arc-shaped adjustment groove 752 and the transmission protrusion 771. The adjustment ejector rod 77 presses the adjustment protrusion 761, and the frictional damping between the adjustment protrusion 761 and the inner wall of the filter cup 6 increases, thereby simultaneously realizing the plugging of the filter cup 6 and simulating the filtration resistance in the filter cup 6. At this time, the piston disc 74 will slowly descend along the filter cup 6 under the action of negative pressure, so that the filter cup 6 that has completed filtration will not contact the outside world, and the situation that the filter cup 6 is completely sealed and causes excessive filtration pressure in other filter cups 6 will not occur, thereby ensuring the overall filtration stability.

[0029] It should be noted that when the axes of the second air hole 751 and the first air hole 742 coincide, there is a closed spacing between the adjusting push rod 77 and the adjusting protrusion 761. Therefore, when the second air hole 751 and the first air hole 742 are completely misaligned, the adjusting push rod 77 will move to the position of the adjusting protrusion 761. Through this design, only the filter cup 6 can be blocked, and the friction between the adjusting protrusion 761 and the filter cup 6 is small. Under the condition of no vacuum pump, manual pressure filtration can be carried out, and the applicable range is wide.

[0030] Embodiment 4, on the basis of the above embodiment, further includes that a connecting rod is arranged at the top of the sliding column 73, and the connecting rods on adjacent multi-connected filter pressure balance assemblies 7 are connected by a lifting rope 8.

[0031] Through the design of the lifting rope 8, when the needle filter element 5 needs to be reused, clean water can be injected into the bottom tube 1, and the multi-connected filter pressure balance assemblies 7 can be lifted simultaneously by using the lifting rope 8, so as to realize the rapid backwashing of the needle filter element 5, and the operation is simple.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi - needle filter, comprising a bottom tube (1) and a clamping assembly, characterized in that, At the top of the bottom pipe (1), there are multiple groups of support pipes (3). Inside the support pipes (3), a valve (31) and a flow sensor (32) are arranged from top to bottom. The handles of multiple groups of valves (31) are connected by a sleeve rod (33). At the top of the support pipe (3), a silica gel plug (4) is provided. Inside the silica gel plug (4), a needle filter element (5) is hermetically inserted. At the top of the needle filter element (5), a filter cup (6) is provided. The needle filter element (5) and the filter cup (6) are fixed together by a clamping assembly. At the top of the filter cup (6), a multi-filter pressure balance assembly (7) is provided. The multi-filter pressure balance assembly (7) can match the filtration resistance of the corresponding needle filter element (5) according to the feedback of the flow sensor (32).

2. The multi-needle filter according to claim 1, characterized in that, The clamping assembly is composed of an upper clamping plate (9) and a lower clamping plate (10) that are hinged to each other. A clamping spring (11) is arranged between the upper clamping plate (9) and the lower clamping plate (10). Clamping rings are arranged at the top of the needle filter element (5) and the bottom of the filter cup (6). The upper clamping plate (9) and the lower clamping plate (10) can hermetically clamp the two clamping rings together.

3. The multi - needle filter according to claim 1, characterized in that, The multi-filter pressure balance assembly (7) includes two inner guide bars (71) fixedly installed on the inner wall of the filter cup (6). At the top of the two inner guide bars (71), a top ring (72) is fixedly installed at the same time. Two sliding holes are opened inside the top ring (72). Inside the sliding holes, sliding columns (73) are inserted. At the bottom of the two sliding columns (73), a piston disk (74) is fixedly installed at the same time. A guide groove (741) is opened on the outer side of the piston disk (74). The inner guide bar (71) is hermetically slidably connected in the guide groove (741). A rubber sealing strip (76) is arranged on the outer side of the piston disk (74). An adjusting protrusion (761) is arranged in the middle of the rubber sealing strip (76). The frictional damping between the adjusting protrusion (761) and the inner wall of the filter cup (6) can be automatically adjusted according to the feedback of the flow sensor (32).

4. The multi - needle filter according to claim 3, characterized in that, An inner groove is opened at the top of the piston disk (74). An adjusting hole (743) is opened on the inner wall of the inner groove. The adjusting protrusion (761) is inserted into the adjusting hole (743). Two first air holes (742) are penetrated and opened at the inner bottom of the inner groove. An adjusting disk (75) is rotatably installed inside the inner groove. Two second air holes (751) are penetrated and opened inside the adjusting disk (75). Two arc-shaped adjusting grooves (752) are opened at the top of the adjusting disk (75). An adjusting top rod (77) is slidably connected inside the adjusting hole (743). A transmission protrusion (771) is arranged at the bottom of the adjusting top rod (77). The transmission protrusion (771) is inserted into the arc-shaped adjusting groove (752). When the axes of the second air hole (751) and the first air hole (742) coincide, there is a closed spacing between the adjusting top rod (77) and the adjusting protrusion (761).

5. The multi - needle filter according to claim 4, characterized in that, A worm (78) is rotatably installed at the top of the piston disk (74). A worm gear (753) is arranged at the top of the adjusting disk (75). The worm gear (753) is meshed with the worm (78).

6. The multi - needle filter according to claim 5, wherein, The top of the piston disc (74) is provided with a mounting bracket (744). An adjusting air cylinder (710) is fixedly installed inside the mounting bracket (744). A piston rod is slidably connected inside the adjusting air cylinder (710). A rack bar (711) is provided at one end of the piston rod away from the adjusting air cylinder (710). A tension spring is provided between the piston rod and the inner wall of the adjusting air cylinder (710). One end of the worm (78) close to the adjusting air cylinder (710) is provided with a gear (79), and the gear (79) meshes with the rack bar (711). The adjusting air cylinder (710) is communicated with a vacuum pump through an air pipe and a solenoid valve. The connection position of the air pipe is close to the worm (78). A controller is provided on the outer side of the bottom pipe (1). The controller receives a flow sensor (32) and controls the opening time of the corresponding solenoid valve according to the flow signal.

7. A multi-pin type filter according to claim 6, characterized in that, A connecting rod is provided at the top of the sliding column (73). The connecting rods on adjacent multi-connected filter pressure balance assemblies (7) are connected by a lifting rope (8).

8. A multi-needle filter according to claim 1, characterized in that Bottom support plates (2) are provided at both ends of the bottom pipe (1). Handle grooves are formed inside the bottom support plates (2).

9. The multi - needle filter according to claim 8, wherein Detachable joints are threadedly connected to both ends of the bottom pipe (1).

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