Raw milk multi-stage filtering device

Abstract

The application relates to a raw milk multi-stage filtering device, and relates to the technical field of filtering devices, which comprises a mounting frame, an upper conveying pipe vertically connected to the mounting frame, a first valve arranged on the pipe, a balance pipe arranged between the outlet end and the first valve for balancing the internal and external pressure, a lower conveying pipe vertically connected to the mounting frame, located below the upper conveying pipe and opposite to the outlet end of the upper conveying pipe, a liquid outlet pipe arranged on one side of the lower conveying pipe, a second valve arranged on the liquid outlet pipe, a filtering pipe detachably connected between the upper conveying pipe and the lower conveying pipe, a guide rail fixedly connected to the mounting frame and slidably connected with the filtering pipe, the filtering pipe being connected with and separated from the upper conveying pipe and the lower conveying pipe through sliding, a piston slidably connected in the lower conveying pipe, a telescopic cylinder hinged between the bottom end of the piston and the lower conveying pipe, and a conveying assembly slidably connected to the guide rail. The application has the effect of improving the replacement efficiency of the filtering element.

Description

Technical Field

[0001] The present application relates to the technical field of filtering devices, and in particular to a multi-stage filtering device for raw milk. Background Art

[0002] Milk refers to the milk of mammals. It is a natural food with a complete nutritional profile, a well-balanced composition, easy digestion, and high nutritional value. Because fresh milk can easily spoil, raw milk is typically collected and sent to dairy processing plants for processing. This processing produces a variety of products, including liquid milk, cream, and milk powder, for diverse needs and industries.

[0003] After the raw milk enters the production plant, it needs to be filtered multiple times using a multi-stage filtration device. First, a preliminary filtration is required to remove solid impurities such as animal hair and feed particles to obtain whole milk. The whole milk is then skimmed and separated to obtain skim milk. The skim milk is then filtered through a ceramic membrane to obtain whey protein. Each stage of filtration will produce different dairy products.

[0004] Regarding the related technologies in the above content, a multi-stage filtration device usually uses a filter element for initial filtration. When the filter element filters out a large amount of impurities, it needs to be replaced. The multi-stage filtration device needs to be manually disassembled to replace the filter element, and the replacement efficiency is low. Summary of the Invention

[0005] In order to improve the replacement efficiency of filter elements, the present application provides a multi-stage filtration device for raw milk.

[0006] The present application provides a multi-stage raw milk filtration device that adopts the following technical solution:

[0007] A raw milk multi-stage filtering device, comprising:

[0008] Mounting rack;

[0009] An upper delivery pipe is vertically connected to the mounting frame, a first valve is provided on the pipe, and a balancing pipe for balancing the internal and external pressures is provided between the outlet end and the first valve;

[0010] The lower delivery pipe is vertically connected to the mounting frame, is located below the upper delivery pipe and directly faces the outlet end of the upper delivery pipe, and is provided with a liquid outlet pipe on one side, and a second valve is provided on the liquid outlet pipe;

[0011] A filter tube is detachably connected between the upper delivery tube and the lower delivery tube;

[0012] The guide rail is fixedly connected to the mounting frame and is slidably connected to the filter tube. The filter tube is connected to and separated from the upper and lower conveying pipes by sliding.

[0013] The piston is slidably connected in the lower delivery pipe, and a telescopic cylinder is hinged between the bottom end and the lower delivery pipe;

[0014] The transport assembly is slidably connected to the guide rail and is used to push the filter tube to slide on the guide rail;

[0015] One of the lower conveying pipes is equipped with two filter pipes, and the two filter pipes perform filtering operations in turn.

[0016] By adopting the above technical solution, when there are a lot of debris in the filter tube and it needs to be replaced, the first valve and the second valve are closed, the piston is lowered, and the liquid level of the raw milk can be lowered into the lower conveying pipe, so that the filter tube to be replaced is emptied. The transport component pushes the other filter tube to push out the filter tube to be replaced, the new filter tube is moved into place, the piston is raised, the liquid level of the raw milk rises again, the first valve and the second valve are opened, and the filtering device can start working again. The staff can clean the replaced filter tube and put it back on the guide rail to wait for the next rotation of the filter tube. There is no need to disassemble and assemble the filtering equipment, which greatly shortens the replacement time of the filter tube and improves the replacement efficiency of the filter tube.

[0017] Optionally, the combination of the upper delivery pipe and the lower delivery pipe is provided in two groups, the inlet ends of the two upper delivery pipes are connected to the delivery main pipe, and the outlet ends of the two liquid outlet pipes are connected to the liquid outlet main pipe.

[0018] By adopting the above technical solution, when the filter tube on one side is replaced, the filter tube on the other side can work normally without stopping the feeding of raw milk, thereby improving the stability of the use of the filtering device.

[0019] Optionally, the guide rail is annular, with two ends corresponding to the outlet ends of the two upper conveying pipes.

[0020] By adopting the above technical solution, only one guide rail is required to realize the replacement of the filter tubes on both sides, which saves materials and also enables the filter tubes on both sides to be located at the same height, so that the filter tubes can be mixed on both sides.

[0021] Optionally, the transport assembly is provided with two groups, including:

[0022] a pulley, slidably connected to the guide rail;

[0023] A push plate is provided at each end of the pulley to push the filter tube;

[0024] Transport rack, connected to the inner side of the guide rail;

[0025] The transport gear shaft is rotatably connected to the pulley and meshes with the transport rack;

[0026] The driving member is arranged on the pulley and is used for driving the transport gear shaft to rotate.

[0027] By adopting the above technical solution, the driving member drives the transport until the wheel shaft rotates, so that the push plate can push the filter tube.

[0028] Optionally, a limit block is provided on the guide rail, and when the pulley pushes the filter tube to connect the upper conveying pipe and the lower conveying pipe, the pulley abuts against the limit block.

[0029] By adopting the above technical solution, the limit block can connect the upper conveying pipe and the lower conveying pipe more accurately when the push plate pushes the filter tube, and can also prevent the pulley from accidentally colliding.

[0030] Optionally, a protective cover is slidably connected to the upper conveying pipe, and a return spring is provided between the top of the protective cover and the upper conveying pipe.

[0031] By adopting the above technical solution, the protective cover can protect the connection between the filter tube and the upper conveying pipe.

[0032] Optionally, the filtering device further includes a linkage component, which includes:

[0033] a support frame connected to the guide rail;

[0034] A lifting rack is fixedly connected to the protective cover;

[0035] The lifting gear shaft is rotatably connected to the support frame and meshes with the lifting rack;

[0036] A trigger rack is slidably connected to the guide rail;

[0037] The trigger gear shaft is rotatably connected to the guide rail and meshes with the trigger rack;

[0038] The transmission bevel gear is coaxially connected to the lifting gear shaft;

[0039] The transmission bevel gear shaft is rotatably connected to the support frame and meshes with the transmission bevel gear;

[0040] The transmission member is connected between the trigger gear shaft and the transmission bevel gear shaft.

[0041] By adopting the above technical solution, when the pulley pushes the trigger rack, the protective cover can move, so that the protective cover can automatically make way for the filter tube before the filter tube passes through.

[0042] Optionally, each end of the lifting gear shaft is connected to a transmission bevel gear, and the two transmission bevel gears are both equipped with a transmission bevel gear shaft, a transmission member, a trigger gear shaft and a trigger rack.

[0043] By adopting the above technical solution, the pulley can trigger the movement of the protective cover from both sides.

[0044] Optionally, a protective cover is also slidably connected to the lower conveying pipe, and is equipped with a reset spring, a lifting rack, a lifting gear shaft and a transmission bevel gear, and the transmission bevel gear is engaged with the transmission bevel gear shaft on the same side.

[0045] By adopting the above technical solution, the two protective covers can respectively protect the connection points at both ends of the filter tube, thereby improving the reliability of the use of the filter device.

[0046] Optionally, the filter tube includes:

[0047] tube body;

[0048] The filter screen is detachably connected to the tube body;

[0049] There are multiple sealing rings, which are respectively embedded in the top end and the bottom end of the tube body.

[0050] By adopting the above technical solution, when there are a lot of debris trapped in the filter, the filter can be directly removed for cleaning.

[0051] In summary, this application includes at least one of the following beneficial technical effects:

[0052] 1. When there is a lot of debris in the filter tube and it needs to be replaced, close the first valve and the second valve, lower the piston, and the liquid level of the raw milk will drop into the lower conveying pipe, so that the filter tube to be replaced is emptied. The transport component pushes the other filter tube to push out the filter tube to be replaced. The new filter tube is moved into place, the piston is raised, the liquid level of the raw milk rises again, and the first valve and the second valve are opened. The filtering device can start working again. The staff will clean the replaced filter tube and put it back on the guide rail to wait for the next filter tube rotation. There is no need to disassemble the filtering equipment, which greatly shortens the replacement time of the filter tube and improves the replacement efficiency of the filter tube.

[0053] 2. Only one guide rail is required to replace the filter tubes on both sides, which saves materials and also enables the filter tubes on both sides to be at the same height, so the filter tubes can be mixed on both sides;

[0054] 3. The limit block can make the upper and lower conveying pipes more accurately connected when the push plate pushes the filter tube, and it can also prevent the pulley from accidentally hitting it;

[0055] 4. When the pulley pushes the trigger rack, the protective cover will move so that the protective cover will automatically make way for the filter tube before the filter tube passes through;

[0056] 5. The two protective covers can protect the connection points at both ends of the filter tube respectively, thereby improving the reliability of the filter device. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1It is a schematic diagram of the overall structure of an embodiment of the present application;

[0058] Figure 2 yes Figure 1 A partial enlarged schematic diagram of part A;

[0059] Figure 3 is a partial cross-sectional view of an embodiment of the present application;

[0060] Figure 4 yes Figure 3 A partial enlarged schematic diagram of part B;

[0061] Figure 5 is a schematic diagram of a guide rail and a transport assembly according to an embodiment of the present application;

[0062] In the figure, 1. mounting frame; 2. upper delivery pipe; 21. first valve; 22. balancing pipe; 23. delivery main pipe; 24. protective cover; 25. reset spring; 3. lower delivery pipe; 31. liquid outlet pipe; 32. second valve; 33. liquid outlet main pipe; 4. filter tube; 41. pipe body; 42. filter screen; 43. sealing ring; 5. guide rail; 51. limit block; 6. piston; 61. telescopic cylinder; 7. transport assembly; 71. pulley; 72. push plate; 73. transport rack; 74. transport gear shaft; 75. driving part; 8. linkage assembly; 81. support frame; 82. lifting rack; 83. lifting gear shaft; 84. trigger rack; 85. trigger gear shaft; 86. transmission bevel gear; 87. transmission bevel gear shaft; 88. transmission part. DETAILED DESCRIPTION

[0063] The following is combined with Figure 1 -Attached Figure 5 , further details of this application are given.

[0064] This application proposes a raw milk multi-stage filtration device, including a preliminary filtration part, a separation filtration part and an ultrafiltration part, referring to Figure 1 and Figure 2The preliminary filtering part comprises a mounting frame 1, upper conveying pipes 2, lower conveying pipes 3, filtering pipes 4, guide rails 5, a piston 6, a conveying assembly 7 and a linkage assembly 8. The upper conveying pipes 2 are connected to the mounting frame 1 and are provided in two, and the top ends of the two upper conveying pipes 2 are connected to a conveying main pipe 23. The lower conveying pipes 3 are provided in two and are respectively opposite to the two upper conveying pipes 2, and the side walls of the two lower conveying pipes 3 are provided with liquid outlet pipes 31, and the two liquid outlet pipes 31 are connected to a liquid outlet main pipe 33. The guide rails 5 are connected to the mounting frame 1. The filtering pipes 4 are slidably connected to the guide rails 5 and are detachably connected to the upper conveying pipes 2 and the lower conveying pipes 3 when the filtering pipes 4 are slid between the upper conveying pipes 2 and the lower conveying pipes 3. The conveying assembly 7 is arranged on the guide rails 5 and is used to push the filtering pipes 4 to move on the guide rails 5. The upper conveying pipes 2 and the lower conveying pipes 3 are slidably connected with protective covers 24, and the linkage assembly 8 is arranged between the guide rails 5 and the protective covers 24, so that the protective covers 24 can be opened in linkage when the conveying assembly 7 pushes the filtering pipes 4.

[0065] The mounting frame 1 is arranged in a production plant. The upper conveying pipes 2 are provided in two and are vertically connected to the mounting frame 1 at intervals, and the outlet ends of the two upper conveying pipes 2 are flush. The inlet ends of the two upper conveying pipes 2 are bent to be close to each other and are connected to the conveying main pipe 23, and raw milk flows into the two upper conveying pipes 2 from the conveying main pipe 23. The upper conveying pipes 2 are provided with first valves 21, and balance pipes 22 are arranged on the side of the first valves 21 close to the outlet ends. The balance pipes 22 are provided with electric control valves and filters and are used to balance the air pressure inside and outside the upper conveying pipes 2.

[0066] The lower conveying pipes 3 are provided in two and are vertically connected to the mounting frame 1 and are respectively opposite to the two upper conveying pipes 2, and the top ends of the two lower conveying pipes 3 are flush. The lower conveying pipes 3 are provided with liquid outlet pipes 31 on the side walls, and the liquid outlet pipes 31 on the two lower conveying pipes 3 are opposite to each other and are connected to the liquid outlet main pipe 33, and the liquid outlet main pipe 33 extends downward and is connected to a subsequent separation and filtering part. The two lower conveying pipes 3 are respectively provided with second valves 32.

[0067] The guide rails 5 are welded to the mounting frame 1 and are in the shape of a ring and are located between the upper conveying pipes 2 and the lower conveying pipes 3 and comprise inner rails and concentric outer rails.

[0068] With reference to Figure 3 and Figure 4The filter tube 4 includes a tube body 41, a filter screen 42, and a sealing ring 43. The circumferential side wall of the tube body 41 is provided with an annular groove, and the guide rail 5 is clamped in the groove, allowing the tube body 41 to slide along the guide rail 5. A receiving ring is provided in the tube body 41, and a plurality of plugs are provided on the filter screen 42, which are plugged into the receiving ring. The filter screen 42 is a cone with a rounded corner at the tip and an opening facing the upper delivery pipe 2. The filter screen 42 is made of stainless steel and is used to filter out larger impurities in the raw milk. When a large amount of impurities accumulate in the filter screen 42, the filter screen 42 can be removed, rinsed and disinfected for reuse. Each tube body 41 is provided with four sealing rings 43, two of which are concentrically embedded at the top of the tube body 41 and two at the bottom. When the tube body 41 is located between the upper delivery pipe 2 and the lower delivery pipe 3, the tube body 41 is sealed and connected to the upper delivery pipe 2 and the lower delivery pipe 3. Each upper conveying pipe 2 is correspondingly provided with two filter tubes 4, and the two filter tubes 4 perform filtering operations alternately.

[0069] Two pistons 6 are provided, each slidably connected to the two lower delivery tubes 3. The bottom ends of the lower delivery tubes 3 are bolted to end plates. A telescopic cylinder 61 is hingedly connected between the end plates and the pistons 6. The telescopic cylinder 61 can be extended or retracted to achieve the raising and lowering of the pistons 6. The telescopic cylinder 61 can be any of a pneumatic cylinder, a hydraulic cylinder, or an electric cylinder. In the embodiment of the present application, the telescopic cylinder 61 is an electric cylinder.

[0070] Reference Figure 1 and Figure 5 The transport assembly 7 comprises a pulley 71, a push plate 72, a transport rack 73, a transport gear shaft 74, and a drive element 75. The pulley 71 is slidably connected to the guide rail 5 and can slide along it. One is located at each end of the guide rail 5, between the two upper conveying pipes 2. A push plate 72 is welded to the pulley 71. Each pulley 71 has two push plates 72, which are used to push the filter tubes 4. The shape of the push plates 72 matches the shape of the filter tubes 4. A transport rack 73 is bolted to the inner side of the inner rail of the guide rail 5. The transport rack 73 is a complete ring. A transport gear shaft 74 is rotatably connected to the slide plate and meshes with the transport rack 73. The drive element 75 is mounted on the slide plate and comprises a drive motor, a sprocket, and a chain. Two sprockets are connected to the output shaft of the drive motor and the transport gear shaft 74, respectively. A chain is interposed between the two sprockets. Driven by the drive motor, the pulley 71 can freely move along the guide rail 5.

[0071] A limit block 51 is welded on the inner side of the inner rail of the guide rail 5. When the pulley 71 slides to abut the limit block 51, it means that the push plate 72 has pushed the filter tube 4 into place. At this time, the filter tube 4 is detachably and sealedly connected to the upper conveying pipe 2 and the lower conveying pipe 3.

[0072] Reference Figure 1 and Figure 2A protective cover 24 is slidably connected to the upper delivery pipe 2. A convex ring is welded to the upper delivery pipe 2. A return spring 25 is installed between the convex ring and the protective cover 24. The return spring 25 pushes the protective cover 24 toward the guide rail 5. The protective cover 24 protects the connection between the filter tube 4 and the upper delivery pipe 2. The lower delivery pipe 3 also has a protective cover 24 and a return spring 25. The structure is identical to that of the upper delivery pipe 2. The two opposing protective covers 24 are symmetrical about the guide rail 5.

[0073] There are two linkage assemblies 8, one for each of the two upper conveying tubes 2. The linkage assembly 8 comprises a support frame 81, a lifting rack 82, a lifting gear shaft 83, a trigger rack 84, a trigger gear shaft 85, a transmission bevel gear 86, a transmission bevel gear shaft 87, and a transmission member 88. The support frame 81 is welded to the outer side of the guide rail 5's outer rail. Two lifting gear shafts 83 are provided, rotatably connected to the top and bottom ends of the support frame 81. The middle portion of each lifting gear shaft 83 is a cylindrical spur gear. There are two lifting racks 82, welded to two upper and lower opposing protective covers 24. Each lifting gear shaft 83 is connected to a transmission bevel gear 86 at each end. There are two transmission bevel gear shafts 87, rotatably connected to the horizontal ends of the support frame 81 and meshing with the transmission bevel gear 86 on the same side. The trigger rack 84 is an arcuate rack, slidably connected to the outer wall of the guide rail 5's outer rail and capable of sliding along the guide rail 5. Each upper conveying tube 2 corresponds to two trigger racks 84, one located on either side of the upper conveying tube 2. The trigger gear shaft 85 is provided with two, is rotatably connected on the guide rail 5, and is respectively engaged with the trigger rack 84 on the same side. Transmission member 88 is a sprocket chain combination, is connected between the trigger gear shaft 85 and the transmission bevel gear shaft 87 on the same side.

[0074] When the pulley 71 approaches the upper conveying pipe 2, it pushes the trigger rack 84, which drives the trigger gear shaft 85 to rotate. The transmission member 88 then drives the transmission follower gear shaft to rotate. The transmission bevel gear shaft 87 drives the lifting gear shaft 83 to rotate. The lifting rack 82 drives the protective cover 24 to move and compress the return spring 25, so that the protective cover 24 makes way for the filter pipe 4 that is about to pass through. The pulley 71 triggers either trigger rack 84 from either side to move and open both protective covers 24.

[0075] The operating principle of the present embodiment is as follows: When a large amount of debris accumulates within the filter tube 4 between the upper and lower delivery tubes 2 and 3, the first and second valves 21 and 32 are closed, and the electrically controlled valve on the balance tube 22 is opened, causing the telescopic cylinder 61 to retract and the piston 6 to descend. This allows outside air to enter the upper delivery tube 2, lowering the raw milk level into the lower delivery tube 3 and draining the liquid from the filter tube 4 to be replaced. The driver 75 is activated, causing the pulley 71 to move, and the push plate 72 pushes the clean filter tube 4. This pushes the trigger rack 84 to slide, allowing the two protective covers 24 to move away from each other and open. The pulley 71 continues to slide until it abuts the stop block 51, pushing the clean filter tube 4 out of the way. The clean filter tube 4 enters the working position and connects to the upper and lower delivery tubes 2 and 3. The driver 75 rotates in the opposite direction, causing the pulley 71 to move away from the upper delivery tube 2, and the protective covers 24 to return to their original position. The telescopic cylinder 61 extends, the piston 6 rises, and the raw milk level returns to the first valve 21. The electric control valve is closed, and the first valve 21 and the second valve 32 are opened in sequence to resume the filtration operation. The filter screen 42 of the replaced filter tube 4 is removed, cleaned, rinsed, and disinfected, and then reinstalled for the next replacement process.

[0076] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A multi-stage filtration device for raw milk, characterized in that: include: Mounting frame (1); an upper delivery pipe (2), vertically connected to the mounting frame (1), provided with a first valve (21), and a balance pipe (22) for balancing internal and external pressures is provided between the outlet end and the first valve (21); a lower delivery pipe (3), vertically connected to the mounting frame (1), located below the upper delivery pipe (2) and facing the outlet end of the upper delivery pipe (2), and provided with a liquid outlet pipe (31) on one side, and provided with a second valve (32) on the liquid outlet pipe (31); a filter pipe (4), detachably connected between the upper delivery pipe (2) and the lower delivery pipe (3); a guide rail (5), fixedly connected to the mounting frame (1), and slidably connected to the filter pipe (4), and the filter pipe (4) is connected to and separated from the upper delivery pipe (2) and the lower delivery pipe (3) by sliding; a piston (6), slidably connected in the lower delivery pipe (3), and a telescopic cylinder (61) is hinged between the bottom end and the lower delivery pipe (3); The transport assembly (7) is slidably connected to the guide rail (5) and is used to push the filter tube (4) to slide on the guide rail (5); one of the lower transport tubes (3) is equipped with two filter tubes (4), and the two filter tubes (4) perform filtering operations in turn; The combination of the upper delivery pipe (2) and the lower delivery pipe (3) is provided in two groups, the inlet ends of the two upper delivery pipes (2) are connected to the delivery main pipe (23), and the outlet ends of the two liquid outlet pipes (31) are connected to the liquid outlet main pipe (33); Wherein, the guide rail (5) is annular, and its two ends correspond to the outlet ends of the two upper conveying pipes (2); The transport assembly (7) is provided with two groups, including: a pulley (71) slidably connected to the guide rail (5); a push plate (72) provided at each end of the pulley (71) for pushing the filter tube (4); a transport rack (73) connected to the inner side of the guide rail (5); a transport gear shaft (74) rotatably connected to the pulley (71) and meshing with the transport rack (73); a driving member (75) provided on the pulley (71) for driving the transport gear shaft (74) to rotate; Wherein, a protective cover (24) is slidably connected to the upper delivery pipe (2), and a return spring (25) is provided between the top end of the protective cover (24) and the upper delivery pipe (2); The invention further comprises a linkage assembly (8), wherein the linkage assembly (8) comprises: a support frame (81) connected to the guide rail (5); a lifting rack (82) fixedly connected to the protective cover (24); a lifting gear shaft (83) rotatably connected to the support frame (81) and meshing with the lifting rack (82); a trigger rack (84) slidably connected to the guide rail (5); a trigger gear shaft (85) rotatably connected to the guide rail (5) and meshing with the trigger rack (84); a transmission bevel gear (86) coaxially connected to the lifting gear shaft (83); a transmission bevel gear shaft (87) rotatably connected to the support frame (81) and meshing with the transmission bevel gear (86); and a transmission member (88) connected between the trigger gear shaft (85) and the transmission bevel gear shaft (87).

2. A raw milk multi-stage filtration device according to claim 1, characterized in that: A limit block (51) is provided on the guide rail (5), and when the pulley (71) pushes the filter tube (4) to connect the upper delivery tube (2) and the lower delivery tube (3), the pulley (71) abuts against the limit block (51).

3. The raw milk multi-stage filtration device according to claim 1, characterized in that: Each end of the lifting gear shaft (83) is connected to a transmission bevel gear (86), and the two transmission bevel gears (86) are each equipped with a transmission bevel gear shaft (87), a transmission member (88), a trigger gear shaft (85) and a trigger rack (84).

4. The raw milk multi-stage filtration device according to claim 3, characterized in that: The lower conveying pipe (3) is also slidably connected to a protective cover (24), and is equipped with a return spring (25), a lifting rack (82), a lifting gear shaft (83) and a transmission bevel gear (86), and the transmission bevel gear (86) is meshed with the transmission bevel gear shaft (87) on the same side.

5. The raw milk multi-stage filtration device according to claim 1, characterized in that: The filter tube (4) comprises: a tube body (41); a filter screen (42) detachably connected to the tube body (41); and a plurality of sealing rings (43) respectively embedded in the top and bottom ends of the tube body (41).

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