A multi-pin filter

Abstract

The present invention discloses a multi-joint needle filter, which relates to the technical field of filtering equipment. The present invention includes a bottom tube and a clamping assembly, wherein the top of the bottom tube is provided with multiple groups of bracket tubes, the interior of the bracket tube is provided with valves and flow sensors from top to bottom, the top of the bracket tube is provided with a silicone plug, the internal sealing plug of the silicone plug is plugged with a needle filter element, the top of the needle filter element is provided with a filter cup, the top of the filter cup is provided with a multi-joint filter pressure balancing assembly, and the multi-joint filter pressure balancing assembly can match the filtration resistance of the corresponding needle filter element. The present invention can detect the filtration speed of different samples under the same air pressure through the design of the multi-joint filter pressure balancing assembly and the flow sensor, and the multi-joint filter pressure balancing assembly blocks the filter cup from being connected to the outside world according to the feedback of the filtration speed, while simulating the filtration damping, so that the remaining filters can still continue to filter stably, and can be applied to multiple samples with large differences in filtration speed.

Description

Technical Field

[0001] The present invention relates to the technical field of filtering equipment, in particular to a multi-pin filter. Background Art

[0002] In food testing, multi-filters are mainly used for filtration testing of packaged drinking water. A stainless steel tube is used with one end closed and the other end connected to a vacuum pump. Six filter cups are connected side by side and sealed on the stainless steel tube. The air inside the stainless steel tube is extracted from one end by a vacuum pump to put its inner cavity in a vacuum state. The one-way valve is then opened to connect the filter cup with the vacuum stainless steel tube, thereby generating a pressure difference between the filter cup and the inside of the stainless steel tube. The water in the filter cup is sucked back into a glass bottle connected to the outlet of the stainless steel tube, thereby filtering and collecting pollutants in the water. Multiple samples can be filtered at the same time.

[0003] The utility model patent (publication number: CN203710791U) discloses a multi-filter, including a filter bracket composed of a stainless steel vacuum tube for transmitting air pressure, a stainless steel filter cup sealed and docked with the filter bracket via a fixing clamp, and a vacuum pump connected to the air outlet of the filter bracket. A liquid collection bottle is also sealed between the air outlet of the filter bracket and the vacuum pump. The filter bracket consists of a horizontal tube and a vertical tube. The filter bracket is T-shaped, and the vertical tube is led out 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] This patent and the prior art have the following technical problems in actual use:

[0005] When processing multiple samples, only products with similar filtration speeds can be processed. If the filtration speed of the sample in one of the filters is too fast, the filter will cause the entire filtration system to be directly connected to the outside world, resulting in the inability to effectively continue to filter subsequent samples, thereby affecting the applicability of the multi-filter. Summary of the Invention

[0006] The purpose of the present invention is to solve the above problems and provide a multi-pin filter.

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0008] A multi-connected needle filter comprises a bottom tube and a clamping assembly. Multiple sets of support tubes are provided on the top of the bottom tube. Valves and flow sensors are provided inside the support tubes from top to bottom. The handles of the multiple sets of valves are connected by sleeve rods. A silicone plug is provided on the top of the support tube. A needle filter element is sealed and inserted into the silicone plug. A filter cup is provided on the top of the needle filter element. The needle filter element and the filter cup are fixed together by a clamping assembly.

[0009] A multi-connected filter pressure balancing component is provided on the top of the filter cup. The multi-connected filter pressure balancing component can match the filter resistance of the corresponding needle filter element according to the feedback of the flow sensor.

[0010] Furthermore, the clamping assembly consists 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, and clamping rings are provided at the top of the needle filter element and the bottom of the filter cup. The upper clamping plate and the lower clamping plate can seal and clamp the two sets of clamping rings together.

[0011] Furthermore, the multi-filter pressure balancing assembly includes two inner guide strips fixedly mounted on the inner wall of the filter cup, a top ring fixedly mounted on the top of the two inner guide strips, two groups of sliding holes are provided inside the top ring, sliding columns are inserted inside the sliding holes, and piston discs are fixedly mounted on the bottoms of the two groups of sliding columns, a guide groove is provided on the outer side of the piston disc, the inner guide strips are sealingly and slidingly connected in the guide groove, a rubber sealing strip is provided on the outer side of the piston disc, and an adjustment protrusion is provided in the middle of the rubber sealing strip, and the friction damping between the adjustment protrusion and the inner wall of the filter cup can be automatically adjusted according to feedback from the flow sensor.

[0012] Furthermore, an inner groove is provided on the top of the piston disc, an adjustment hole is provided on the inner wall of the inner groove, an adjustment protrusion is inserted in the adjustment hole, two first air holes are provided through the inner bottom of the inner groove, an adjustment disk is rotatably installed inside the inner groove, two second air holes are provided through the inside of the adjustment disk, two arc-shaped adjustment grooves are provided on the top of the adjustment disk, an adjustment push rod is slidingly connected to the inside of the adjustment hole, a transmission protrusion is provided at the bottom of the adjustment push rod, and the transmission protrusion is inserted in the arc-shaped adjustment groove. When the axis of the second air hole coincides with the axis of the first air hole, there is a closed distance between the adjustment push rod and the adjustment protrusion.

[0013] Furthermore, a worm is rotatably mounted on the top of the piston disc, and a worm wheel is provided on the top of the regulating disc, and the worm wheel is meshed with the worm.

[0014] Furthermore, a mounting bracket is provided on the top of the piston disc, and an adjusting air cylinder is fixedly installed inside the mounting bracket. A piston rod is slidably connected to the inside of the adjusting air cylinder. A gear rod is provided at the end of the piston rod away from the adjusting air cylinder, and a tension spring is provided between the piston rod and the inner wall of the adjusting air cylinder. A gear is provided at the end of the worm gear close to the adjusting air cylinder, and the gear is meshed with the gear rod. The adjusting air cylinder is connected to the vacuum pump through an air pipe and an electromagnetic valve. The air pipe connection position is close to the worm gear. A controller is provided on the outside of the bottom pipe. The controller receives a flow sensor and controls the opening time of the corresponding solenoid valve according to the flow signal.

[0015] Furthermore, a connecting rod is provided on the top of the sliding column, and the connecting rods on adjacent multi-connected filter pressure balancing assemblies are connected by a lifting rope.

[0016] Furthermore, bottom supporting plates are provided at both ends of the bottom tube, and handle grooves are provided inside the bottom supporting plates.

[0017] Furthermore, both ends of the bottom pipe are threadedly connected with detachable joints.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The present invention can detect the filtration speed of different samples under the same air pressure through the design of a multi-filter pressure balancing component and a flow sensor. The multi-filter pressure balancing component blocks the connection between the filter cup and the outside world based on the feedback of the filtration speed, while simulating filtration damping so that the remaining filters can still continue to filter stably. It is applicable to multiple samples with large differences in filtration speed and has a wide range of applications.

[0020] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is an overall exploded view of the present invention;

[0023] Figure 3 This is a schematic structural diagram of a multi-filter pressure balancing assembly according to the present invention;

[0024] Figure 4 This is an exploded view of the multi-filter pressure balancing assembly of the present invention;

[0025] Figure 5 This is a schematic diagram of the piston disc structure of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the adjustment disk of the present invention.

[0027] Figure numerals: 1. bottom tube; 2. bottom support plate; 3. bracket tube; 31. valve; 32. flow sensor; 33. sleeve rod; 4. silicone plug; 5. needle filter element; 6. filter cup; 7. multi-filter pressure balancing assembly; 71. inner guide strip; 72. top ring; 73. slide 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-shaped 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. gear rod; 8. lifting rope; 9. upper splint; 10. lower splint; 11. clamping spring. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, 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.

[0029] Example 1, as Figures 1-6 As shown, a multi-connected needle filter includes a bottom tube 1 and a clamping assembly. Multiple sets of support tubes 3 are provided on the top of the bottom tube 1. Valves 31 and flow sensors 32 are provided inside the support tubes 3 from top to bottom. The handles of the multiple sets of valves 31 are connected by sleeve rods 33. A silicone plug 4 is provided on the top of the support tube 3. A needle filter element 5 is sealed and inserted into the silicone plug 4. A filter cup 6 is provided on the top of the needle filter element 5. The needle filter element 5 and the filter cup 6 are fixed together by a clamping assembly.

[0030] A multi-connected filter pressure balancing assembly 7 is provided on the top of the filter cup 6 . The multi-connected filter pressure balancing assembly 7 can match the filter resistance of the corresponding needle filter element 5 according to the feedback from the flow sensor 32 .

[0031] Furthermore, bottom supporting plates 2 are provided at both ends of the bottom tube 1 , and handle grooves are provided inside the bottom supporting plates 2 to provide support for the device while facilitating the transportation of the device.

[0032] Furthermore, both ends of the bottom pipe 1 are threadedly connected with detachable joints, which can be quickly replaced and are suitable for connecting different pipelines.

[0033] Assemble, install the silicone plug 4 on the bracket 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 bracket tube 3, and then use the clamping assembly to seal the filter cup 6 on the needle filter element 5 to complete the rapid assembly of the device. The modular design allows for quick replacement and maintenance of the needle filter element, greatly improving the continuous use efficiency of the filter.

[0034] When in 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 single control is used, the sleeve rod 33 is not installed on the handle of the valve 31, and the corresponding valve 31 can be opened separately to realize single sample processing;

[0035] When multiple samples of the same type need to be filtered but with significantly different filtration rates, the handles of multiple valves 31 are connected together using a sleeve rod 33. During filtration, all valves 31 are opened simultaneously, and multiple samples are filtered simultaneously. Under the action of vacuum negative pressure, the sample in the filter cup 6 passes through the needle filter element 5 and enters the support tube 3. The flow sensor 32 detects the filtration rate of the filter, and the information after 1 second is recorded in the controller. The filtrate then 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 balancing assembly 7 seals the filter cup 6. At the same time, based on the recorded information, the controller matches the filtration resistance of the corresponding needle filter element 5. At this time, the multi-connected filter pressure balancing assembly 7 simulates the filtration resistance of the filter cup 6, so that the filter cup 6 after filtration will neither come into contact with the outside world nor be completely sealed, which will cause excessive filtration pressure in other filter cups 6, thereby ensuring overall filtration stability. The filters that complete filtration subsequently operate in the same manner to ensure stable filtration until the last one.

[0036] Embodiment 2, based on the above embodiment, further includes that the clamping assembly consists of an upper clamping plate 9 and a lower clamping plate 10 that are hinged to each other, a clamping spring 11 is provided between the upper clamping plate 9 and the lower clamping plate 10, and clamping rings are provided on 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 seal and clamp the two sets of clamping rings together.

[0037] By pinching the handles of the upper clamping plate 9 and the lower clamping plate 10 to unfold the upper clamping plate 9 and the lower clamping plate 10, the needle filter element 5 and the filter cup 6 can be quickly disassembled.

[0038] Embodiment 3, based on the above embodiment, further includes: the multi-connected filter pressure balancing assembly 7 includes two inner guide bars 71 fixedly mounted on the inner wall of the filter cup 6; a top ring 72 is fixedly mounted on the top of the two inner guide bars 71; two sets of sliding holes are opened inside the top ring 72; sliding posts 73 are inserted into the sliding holes; piston discs 74 are fixedly mounted on the bottom of the two sets of sliding posts 73; a guide groove 741 is opened on the outer side of the piston disc 74; the inner guide bars 71 are sealingly and slidingly connected in the guide groove 741; a rubber sealing strip 76 is provided on the outer side of the piston disc 74; an adjustment protrusion 761 is provided in the middle of the rubber sealing strip 76; the friction damping between the adjustment protrusion 761 and the inner wall of the filter cup 6 can be automatically adjusted according to feedback from the flow sensor 32;

[0039] 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, the inner bottom of the inner groove is provided with two first air holes 742, the inner interior of the inner groove is rotatably mounted with an adjustment disk 75, the interior of the adjustment disk 75 is provided with two second air holes 751, the top of the adjustment disk 75 is provided with two arc-shaped adjustment grooves 752, the interior of the adjustment hole 743 is slidably connected with an adjustment push rod 77, the bottom of the adjustment push rod 77 is provided with a transmission protrusion 771, the transmission protrusion 771 is inserted into the arc-shaped adjustment groove 752, when the axis of the second air hole 751 coincides with the axis of the first air hole 742, there is a closed gap between the adjustment push rod 77 and the adjustment protrusion 761;

[0040] A worm 78 is rotatably mounted on the top of the piston disc 74 , and a worm gear 753 is provided on the top of the adjustment disc 75 , which meshes with the worm 78 ;

[0041] A mounting bracket 744 is provided on the top of the piston disc 74, and an adjusting air cylinder 710 is fixedly installed inside the mounting bracket 744. The adjusting air cylinder 710 is slidably connected to the inside of the adjusting air cylinder 710 with a piston rod. A gear rod 711 is provided at the end of the piston rod away from the adjusting air cylinder 710, and a tension spring is provided between the piston rod and the inner wall of the adjusting air cylinder 710. A gear 79 is provided at the end of the worm gear 78 close to the adjusting air cylinder 710, and the gear 79 is engaged with the gear rod 711. The adjusting air cylinder 710 is connected to the vacuum pump through an air pipe and an electromagnetic valve. The air pipe connection position is close to the worm gear 78. A controller is provided on the outside of the bottom tube 1. The controller receives the flow sensor 32 and controls the opening time of the corresponding electromagnetic valve according to the flow signal.

[0042] This embodiment is a specific structure of a multi-connected filter pressure balancing assembly 7. The flow sensor 32 detects the filtration speed of the filter, and the information after 1 second is recorded in the controller. Then, the filtrate enters the collection bottle through the bottom pipe 1. When the flow sensor 32 in the filter that completes the filtration first detects that there is no flow, the controller controls the opening time of the solenoid valve according to the recorded information, so that negative pressure is generated in the regulating cylinder 710. The negative pressure drives the piston rod to extend, and the piston rod drives the gear 79 to rotate through the gear rod 711. The gear 79 drives the worm 78 to rotate. The worm 78 drives the adjustment disk 75 to rotate through the worm gear 753, and the adjustment disk 75 drives the second air hole 751 is misaligned with the first air hole 742 to achieve sealing of the filter cup 6. At the same time, the adjustment disk 75 drives the adjustment push rod 77 to slide through the arc-shaped adjustment groove 752 and the transmission protrusion 771. The adjustment push rod 77 squeezes the adjustment protrusion 761, and the friction damping between the adjustment protrusion 761 and the inner wall of the filter cup 6 increases, thereby simultaneously achieving the sealing of the filter cup 6 and simulating the filtration resistance in the filter cup 6. At this time, the piston disk 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 filter cup 6 will not be completely sealed, resulting in excessive filtration pressure in other filter cups 6, thereby ensuring overall filtration stability.

[0043] It should be noted that when the axis of the second air hole 751 coincides with the axis of the first air hole 742, there is a closed distance between the adjusting push rod 77 and the adjusting protrusion 761. Therefore, when the second air hole 751 is completely misaligned with the first air hole 742, 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. In the absence of a vacuum pump, manual pressure filtration can be performed, and the application range is wide.

[0044] The fourth embodiment, based on the above embodiment, further includes that a connecting rod is provided on the top of the sliding column 73 , and the connecting rods on adjacent multi-connected filter pressure balancing assemblies 7 are connected by a lifting rope 8 .

[0045] 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 pipe 1, and the lifting rope 8 can be used to simultaneously lift the multi-filter pressure balancing assembly 7 to achieve rapid backwashing of the needle filter element 5, which is easy to operate.

[0046] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-pin filter, comprising a bottom tube (1) and a clamping assembly, characterized in that: A plurality of support tubes (3) are provided on the top of the bottom tube (1), valves (31) and flow sensors (32) are provided inside the support tubes (3) from top to bottom, and the handles of the plurality of valves (31) are connected via a sleeve rod (33). A silicone plug (4) is provided on the top of the support tube (3), a needle filter element (5) is sealed and plugged into the inside of the silicone plug (4), a filter cup (6) is provided on the top of the needle filter element (5), and the needle filter element (5) and the filter cup (6) are fixed together via a clamping assembly. A multi-connected filter pressure balancing assembly (7) is provided on the top of the filter cup (6), and the multi-connected filter pressure balancing assembly (7) can match the filtration resistance of the corresponding needle filter element (5) according to feedback from the flow sensor (32); The multi-connected filter pressure balancing assembly (7) comprises two inner guide strips (71) fixedly mounted on the inner wall of the filter cup (6), a top ring (72) fixedly mounted on the top of the two inner guide strips (71), two sets of sliding holes are provided inside the top ring (72), a sliding column (73) is inserted into the interior of the sliding hole, a piston disc (74) is fixedly mounted on the bottom of the two sets of sliding columns (73), a guide groove (741) is provided on the outer side of the piston disc (74), the inner guide strips (71) are sealingly slidably connected in the guide groove (741), a rubber sealing strip (76) is provided on the outer side of the piston disc (74), an adjusting protrusion (761) is provided in the middle of the rubber sealing strip (76), the friction 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), the top of the piston disc (74) is provided with a plurality of sliding holes, and a plurality of sliding holes are inserted into the sliding holes. The piston disc (74) is fixedly mounted on the bottom of the two sets of sliding columns (73), a guide groove (741) is provided on the outer side of the piston disc (74), and an adjusting protrusion (761) is provided in the middle of the rubber sealing strip (76), and the friction 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). An inner groove is provided on the inner wall of the inner groove, an adjustment hole (743) is provided on the inner wall of the inner groove, an adjustment protrusion (761) is inserted into the adjustment hole (743), two first air holes (742) are provided through the inner bottom of the inner groove, an adjustment disk (75) is rotatably installed inside the inner groove, two second air holes (751) are provided through the inside of the adjustment disk (75), two arc-shaped adjustment grooves (752) are provided on the top of the adjustment disk (75), an adjustment push rod (77) is slidably connected inside the adjustment hole (743), a transmission protrusion (771) is provided on the bottom of the adjustment push 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 with each other, a closed distance exists between the adjustment push rod (77) and the adjustment protrusion (761).

2. The multi-pin filter according to claim 1, characterized in that: The clamping assembly consists of an upper clamping plate (9) and a lower clamping plate (10) which are hinged to each other. A clamping spring (11) is provided between the upper clamping plate (9) and the lower clamping plate (10). The top of the needle filter element (5) and the bottom of the filter cup (6) are both provided with clamping rings. The upper clamping plate (9) and the lower clamping plate (10) can seal and clamp the two sets of clamping rings together.

3. The multi-pin filter according to claim 1, characterized in that: A worm (78) is rotatably mounted on the top of the piston disc (74), and a worm wheel (753) is provided on the top of the regulating disc (75), and the worm wheel (753) is meshed with the worm (78).

4. The multi-pin filter according to claim 3, characterized in that: A mounting frame (744) is provided on the top of the piston disc (74), and an adjusting air cylinder (710) is fixedly installed inside the mounting frame (744). The adjusting air cylinder (710) is slidably connected to a piston rod inside. A gear rod (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). A gear (79) is provided at one end of the worm (78) close to the adjusting air cylinder (710). The gear (79) is meshed with the gear rod (711). The adjusting air cylinder (710) is connected to the vacuum pump through an air pipe and an electromagnetic valve. The air pipe connection position is close to the worm (78). A controller is provided on the outside of the bottom tube (1). The controller receives a flow sensor (32) and controls the opening time of the corresponding electromagnetic valve according to the flow signal.

5. The multi-pin filter according to claim 4, characterized in that: A connecting rod is provided on the top of the sliding column (73), and the connecting rods on adjacent multi-connected filter pressure balancing assemblies (7) are connected via a lifting rope (8).

6. The multi-syringe filter according to claim 1, characterized in that: Both ends of the bottom tube (1) are provided with bottom supporting plates (2), and a handle groove is provided inside the bottom supporting plates (2).

7. The multi-syringe filter according to claim 6, characterized in that: Both ends of the bottom pipe (1) are threadedly connected with detachable joints.

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