A multi-connected filter for food inspection

Abstract

The utility model provides a kind of multiple filter for food inspection, it is related to food inspection equipment technical field, including three independent filters, the opposite end of adjacent two the independent filters is fixedly connected with a connecting assembly, the opposite surface of front and rear the independent filters is fixedly connected with support frame.The utility model passes through the cooperation between filter screen support, filter cup, right-angle clamping plate, threaded plate and threaded collar, and the synchronous pressing force that is realized by threaded drive is more uniform and stable, avoids the filter cup loosening problem caused by the spring attenuation of clip, and the anti-rotation locking design of right-angle clamping plate further prevents filter cup displacement, and cooperation sealing ring can greatly improve the sealing performance of filter cup and filter screen support, effectively prevent sample solution leakage;Meanwhile, only need to rotate threaded collar can complete the installation and disassembly of filter cup, operation step is simplified, compared with the complicated buckling of clip connection, the installation and disassembly time of single filter cup can be effectively shortened, and the inspection operation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of food inspection equipment technology, and in particular to a multi-stage filter for food inspection. Background Technology

[0002] Food inspection is an important technical means to determine whether food meets quality and safety requirements and protect consumers' health and food safety, based on relevant national laws, regulations, standards and technical specifications, and through physical, chemical and microbiological testing methods. Microbiological testing and impurity separation are common items in the food inspection process, and these items often require filtering the food sample solution to obtain the microorganisms to be tested or to remove impurities.

[0003] Multi-unit filters are specialized devices used for sample filtration in the food inspection field. Their core function is to filter multiple food samples simultaneously by setting up multiple parallel filtration units. Compared with traditional single-unit filters, they can significantly improve inspection efficiency and reduce sample processing time, making them particularly suitable for testing batches of food samples. The device typically consists of a filter holder, filter cup, filter membrane, and liquid collection assembly, and uses gravity or negative pressure principles to achieve the filtration and separation of sample solutions.

[0004] A current multi-stage filter for food inspection has the following shortcomings:

[0005] Because filter cups and filter screen supports often use a clamp-and-spring connection, the clamping force is prone to decay and uneven distribution, only achieving a simple snap-fit ​​and failing to provide stable clamping force to the filter cups. Furthermore, the lack of rotational restrictions on the connection structure leads to problems such as filter cups easily loosening and shifting during filtration, poor sealing performance, and sample solution leakage contaminating the experimental environment. Additionally, the cumbersome installation and disassembly of filter cups affects testing efficiency. Moreover, existing devices often use integrated, fixed structures for multi-unit filtration, with adjacent units connected by non-removable supports. This prevents flexible adjustment of the number of filtration units based on sample volume, and the connection structure lacks precise positioning and secure locking design. This results in wasted equipment resources when sample volume is low, while requiring additional multi-unit equipment to increase costs when sample volume is high. Furthermore, gaps at the connection points can cause coaxiality deviations in the filtration units, affecting the stability of liquid collection. Utility Model Content

[0006] This utility model proposes a multi-unit filter for food inspection. It achieves stable clamping and anti-rotation locking of the filter cup and filter screen support through a threaded right-angle clamping plate structure, improving sealing reliability and ease of operation. At the same time, it achieves flexible splicing and precise positioning of independent filters through a toothed ring drive plug-in locking structure, and the number of filter units can be controlled as needed, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a multi-stage filter for food inspection, comprising three independent filters, wherein a connecting component is fixedly connected to the opposite ends of two adjacent independent filters, and a support frame is fixedly connected to the opposite sides of two front and rear independent filters.

[0008] The independent filter includes a connecting pipe, a valve is fixedly connected to the top of the outer surface of the connecting pipe, a filter screen bracket is fixedly connected to the top of the valve, a filter cup is slidably inserted into the top of the filter screen bracket, and an annular groove is formed on the bottom of the outer surface of the filter cup.

[0009] The outer surface of the filter support is provided with four limiting grooves in an annular array. The inner surface of the limiting groove is slidably connected to a limiting slide plate. The top of the limiting slide plate is rotatably connected to a right-angle clamping plate. The top of the right-angle clamping plate is rotatably engaged with the inner side of the annular groove. The outer surface of the limiting slide plate is fixedly connected to a threaded plate. The outer surfaces of the four threaded plates are threadedly connected to a threaded collar.

[0010] Preferably, limit baffles are provided on both the upper and lower sides of the outer surface of the threaded collar, and the limit baffles are fixedly connected to the outer surface of the filter screen bracket.

[0011] Preferably, a filter screen is fixedly connected to the inner surface of the filter screen support, and a sealing ring is fixedly connected to the top of the filter screen.

[0012] Preferably, the top of the filter cup is provided with a cup lid.

[0013] Preferably, the outer surface of the connecting pipe has three T-shaped slots arranged in a ring array at both the left and right ends.

[0014] Preferably, the connecting assembly includes a connecting sleeve, one end of which is slidably inserted into the inner surface of the connecting sleeve, and three plug-in plates are fixedly connected in a circular array on both the left and right sides of the inner surface of the connecting sleeve, and the plug-in plates are slidably inserted into the inner surface of the T-shaped slot.

[0015] Preferably, a drive gear ring is rotatably connected to the middle of the outer surface of the plug plate, and three transmission wheels are meshed in an annular array on the inner surface of the drive gear ring. Three movable slots are formed in an annular array on the middle of the outer surface of the connecting sleeve, and the transmission wheels are rotatably connected inside the movable slots.

[0016] Preferably, a transmission screw is fixedly connected to both the left and right sides of the transmission wheel, and a connecting groove that runs through the middle of the plug plate is provided. The end of the transmission screw away from the transmission wheel extends through to the inner surface of the connecting groove.

[0017] Preferably, the outer surface of the transmission screw is threadedly connected to an H-shaped sliding plate, the outer surface of the H-shaped sliding plate is slidably connected to the inner surface of the connecting groove, and U-shaped fixing plates are slidably connected to both the front and rear sides of the outer surface of the H-shaped sliding plate, with the end of the U-shaped fixing plate away from the H-shaped sliding plate extending through to the inner side of the T-shaped slot.

[0018] Preferably, sliding blocks are fixedly connected to both the upper and lower sides of the outer surface of the U-shaped fixing plate, and inclined sliding grooves are opened on both the upper and lower sides of the inner surface of the connecting groove, and the sliding blocks are slidably connected inside the inclined sliding grooves.

[0019] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0020] 1. In this utility model, the synchronous clamping force achieved by the threaded drive through the mutual cooperation between the filter screen support, filter cup, right-angle clamping plate, threaded plate and threaded collar is more uniform and stable, avoiding the problem of filter cup loosening caused by the decrease of clamping force. The anti-rotation locking design of the right-angle clamping plate further prevents the filter cup from shifting. Combined with the sealing ring, it can greatly improve the sealing performance between the filter cup and the filter screen support, effectively preventing the leakage of sample solution. At the same time, the installation and removal of the filter cup can be completed by simply rotating the threaded collar, simplifying the operation steps. Compared with the cumbersome fastening of clamp connection, the loading and unloading time of a single filter cup can be effectively shortened, improving the efficiency of the inspection operation.

[0021] 2. In this utility model, through the mutual cooperation between the connecting pipe, connecting sleeve, driving gear ring, transmission screw, H-shaped sliding plate and U-shaped fixing plate, the number of independent filters to be connected can be flexibly selected according to the number of samples, eliminating the need to purchase equipment separately for different numbers of filters, thus reducing equipment procurement costs; the synchronous locking achieved by the transmission of the gear ring ensures uniform locking force between the connecting pipe and connecting sleeve, and the positioning of the T-shaped slot and plug-in plate ensures the coaxiality of adjacent independent filters, avoiding liquid collection offset problems caused by connection gaps; at the same time, each independent filter can be disassembled and replaced independently, and if a filter unit fails, there is no need to replace the entire equipment, only to repair or replace the faulty unit, reducing equipment maintenance costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the multi-stage filter for food inspection according to this utility model;

[0023] Figure 2 This is a schematic diagram of the unfolded structure of the independent filter of this utility model;

[0024] Figure 3 This is an enlarged structural schematic diagram of the filter support of this utility model;

[0025] Figure 4 This is a cross-sectional structural diagram of the connecting component of this utility model;

[0026] Figure 5 This is an enlarged structural schematic diagram of the plug-in board of this utility model.

[0027] Legend: 1. Independent filter; 11. Connecting pipe; 12. T-shaped groove; 13. Valve; 14. Filter screen support; 141. Limiting slide groove; 142. Limiting sliding plate; 143. Right-angle clamping plate; 144. Threaded plate; 145. Threaded collar; 146. Limiting baffle; 15. Filter screen; 16. Sealing ring; 17. Filter cup; 18. Cup lid; 19. Annular groove; 2. Connecting assembly; 21. Connecting sleeve; 22. Insert plate; 23. Drive gear ring; 24. Transmission wheel; 25. Transmission screw; 26. Connecting slide groove; 27. H-shaped sliding plate; 28. U-shaped fixing plate; 29. ​​Sliding block; 210. Inclined slide groove; 3. Support frame. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0030] Example 1: As Figure 1 , Figure 2 and Figure 3As shown, this utility model provides a technical solution: it includes three independent filters 1, with a connecting component 2 fixedly connected to the opposite ends of each pair of adjacent independent filters 1, and a support frame 3 fixedly connected to the opposite sides of each pair of front and rear independent filters 1. Each independent filter 1 includes a connecting pipe 11, with a valve 13 fixedly connected to the top of the outer surface of the connecting pipe 11, and a filter screen support 14 fixedly connected to the top of the valve 13. A filter cup 17 is slidably inserted into the top of the filter screen support 14, and an annular groove 19 is formed on the bottom of the outer surface of the filter cup 17. Four limiting grooves 141 are formed in an annular array on the outer surface of the filter screen support 14, and the inner surface of the limiting grooves 141 slides... A limiting slide plate 142 is connected, and a right-angle clamping plate 143 is rotatably connected to the top of the limiting slide plate 142. The top of the right-angle clamping plate 143 is rotatably clamped into the inner side of the annular groove 19. A threaded plate 144 is fixedly connected to the outer surface of the limiting slide plate 142. A threaded collar 145 is threadedly connected to the outer surface of the four threaded plates 144. Limiting baffles 146 are provided on both the upper and lower sides of the outer surface of the threaded collar 145. The limiting baffles 146 are fixedly connected to the outer surface of the filter support 14. A filter screen 15 is fixedly connected to the inner surface of the filter support 14. A sealing ring 16 is fixedly connected to the top of the filter screen 15. A cup lid 18 is provided at the top of the filter cup 17.

[0031] The overall effect of Embodiment 1 is as follows: it achieves a quick and stable connection between the filter cup 17 and the filter screen support 14. In actual food inspection operations, inspectors do not need to use additional tools; they can simply rotate the threaded collar 145 to install and remove the filter cup 17, greatly simplifying the operation process. The limiting baffle 146 can limit the axial displacement of the threaded collar 145, preventing it from shifting due to vibration during filtration, further ensuring connection stability. The sealing ring 16 inside the filter screen support 14 fits tightly against the bottom of the filter cup 17. Combined with the downward pressing force of the right-angle clamping plate 143 on the filter cup 17, it can effectively block the leakage path of the sample solution, maintaining a good sealing effect even when filtering high-viscosity food samples. The cup lid 18 at the top of the filter cup 17 can prevent external dust and microorganisms from contaminating the sample, while reducing the evaporation of the sample solution during filtration, ensuring the purity and concentration of the test sample are stable, and providing an accurate sample basis for subsequent microbial detection or impurity analysis.

[0032] Example 2: Figure 4 and Figure 5As shown, this utility model provides a technical solution: Three T-shaped slots 12 are arranged in annular arrays on both the left and right ends of the outer surface of the connecting tube 11. The connecting assembly 2 includes a connecting sleeve 21. One end of the connecting tube 11 is slidably inserted into the inner surface of the connecting sleeve 21. Three insertion plates 22 are fixedly connected in annular arrays on both the left and right sides of the inner surface of the connecting sleeve 21. The insertion plates 22 are slidably inserted into the inner surface of the T-shaped slots 12. A drive gear ring 23 is rotatably connected to the middle of the outer surface of the insertion plate 22. Three transmission wheels 24 are meshed in annular arrays on the inner surface of the drive gear ring 23. Three movable slots are arranged in annular arrays on the middle of the outer surface of the connecting sleeve 21. The transmission wheels 24 are rotatably connected inside the movable slots. Three fixed slots 24 are fixedly connected to the left and right sides of the transmission wheels 24. A drive screw 25 is fixedly connected to the connecting plate 22. A connecting groove 26 that runs through the middle of the plate is provided. The end of the drive screw 25 away from the drive wheel 24 passes through the inner surface of the connecting groove 26. An H-shaped sliding plate 27 is threadedly connected to the outer surface of the drive screw 25. The outer surface of the H-shaped sliding plate 27 is slidably connected to the inner surface of the connecting groove 26. U-shaped fixing plates 28 are slidably connected to both the front and rear sides of the outer surface of the H-shaped sliding plate 27. The end of the U-shaped fixing plate 28 away from the H-shaped sliding plate 27 passes through the inner side of the T-shaped slot 12. Sliding blocks 29 are fixedly connected to both the upper and lower sides of the outer surface of the U-shaped fixing plate 28. Inclined grooves 210 are provided on both the upper and lower sides of the inner surface of the connecting groove 26. The sliding blocks 29 are slidably connected inside the inclined grooves 210.

[0033] The overall effect of Embodiment 2 is as follows: it achieves flexible splicing and stable locking between independent filters 1; the initial positioning of the plug plate 22 and the T-shaped slot 12 ensures that adjacent independent filters 1 can be quickly aligned during splicing without repeated adjustments; the drive gear ring 23 drives the three transmission wheels 24 to rotate synchronously, thereby causing the transmission screw 25 to drive the H-shaped slide plate 27 to slide; in conjunction with the guiding effect of the inclined slide groove 210 on the sliding block 29, the U-shaped fixing plate 28 can be evenly stressed and tightly inserted into the T-shaped slot 12, avoiding the connection gap problem caused by uneven stress in traditional connection structures; this splicing method can not only flexibly increase or decrease the number of independent filters 1 according to the number of food samples, but also ensure the coaxiality of each independent filter 1 after splicing, so that the filtered sample solution flows accurately into the collection container, eliminating the collection offset and cross-contamination caused by coaxiality deviation; at the same time, each independent filter 1 can be disassembled independently; if the filter screen 15 of a certain filter unit is blocked or the sealing ring 16 fails, only the unit needs to be replaced, without stopping the entire multi-unit filter, ensuring the continuity of the inspection work.

[0034] The working principle of the entire device is as follows: Before using the multi-unit filter for food testing to filter samples, first determine the number of independent filters 1 to be spliced ​​according to the number of food samples to be tested. If three sets of samples need to be processed, first insert the connecting tube 11 of the first independent filter 1 into the left side of the connecting sleeve 21, so that the insertion plate 22 on the left side of the connecting sleeve 21 is engaged with the T-shaped slot 12 of the connecting tube 11 to complete the initial positioning; then rotate the drive gear ring 23 outside the connecting sleeve 21. The drive gear ring 23 drives the drive wheel 24 to rotate through the meshing relationship with the drive wheel 24. The drive screws 25 on both sides of the drive wheel 24 rotate synchronously. The threaded connection between the drive screws 25 and the H-shaped slide plate 27 causes the H-shaped slide plate to rotate. Plate 27 slides axially along the transmission screw 25 within the connecting groove 26; when the H-shaped sliding plate 27 slides, it pushes the U-shaped fixing plates 28 on both sides to move, and the sliding block 29 on the U-shaped fixing plate 28 slides within the inclined groove 210. The inclined structure of the inclined groove 210 causes the U-shaped fixing plate 28 to open towards the inside of the T-shaped slot 12 during movement, until the U-shaped fixing plate 28 is tightly inserted into the T-shaped slot 12, thus achieving a stable lock between the first independent filter 1 and the connecting sleeve 21; following the same steps, the second and third independent filters 1 are sequentially spliced ​​onto the right side of the connecting sleeve 21 and the subsequent connecting assembly 2, while the entire multi-unit filter is fixed on the experimental table by the support frame 3 to ensure the stability of the equipment;

[0035] After the equipment assembly is completed, the filter cup 17 is installed: Open the cup cover 18 at the top of the filter cup 17, pour the food sample solution to be filtered into the filter cup 17, and then slide the filter cup 17 into the top of the filter screen support 14 so that the bottom of the filter cup 17 fits against the sealing ring 16 inside the filter screen support 14; then rotate the four right-angle clamping plates 143 outside the filter screen support 14 around the top of the limiting slide plate 142 respectively, so that the top of the right-angle clamping plates 143 engages with the annular groove 19 at the bottom of the filter cup 17; then rotate the thread clockwise. The collar 145, through the threaded engagement between the threaded collar 145 and the four threaded plates 144, drives the threaded plates 144 to slide synchronously downward along the radial direction of the filter support 14. The threaded plates 144 drive the limiting slide plate 142 to move downward within the limiting slide groove 141. The limiting slide plate 142 pulls the bottom end of the right-angle clamping plate 143 into the limiting slide groove 141, restricting the rotation of the right-angle clamping plate 143. At the same time, the right-angle clamping plate 143 forms a uniform downward pressing force on the filter cup 17, ensuring a reliable seal between the filter cup 17 and the filter support 14.

[0036] After installation, open valve 13 outside connecting pipe 11. The food sample solution in filter cup 17 slowly flows into filter screen support 14 under gravity. After filtration by filter screen 15, impurities or microorganisms in the sample are trapped on filter screen 15. The filtered solution flows into connecting pipe 11 through filter screen support 14, and then flows precisely into the collection container below along connecting pipe 11. If it is necessary to pause the filtration operation of a certain independent filter 1 during the filtration process, simply close valve 13 on the connecting pipe 11 of that unit. This will not affect the normal filtration of other units.

[0037] After filtration, rotate the threaded collar 145 counterclockwise. The threaded collar 145 drives the threaded plate 144 and the limiting slide plate 142 to move upward. The limiting slide plate 142 no longer exerts a pulling force on the right-angle clamping plate 143. At this time, rotate the right-angle clamping plate 143 out of the annular groove 19, and then pull out the filter cup 17 upward for cleaning or replacement. If it is necessary to disassemble the independent filter 1, rotate the drive gear ring 23 in the opposite direction, so that the transmission screw 25 drives the H-shaped slide plate 27 to slide in the opposite direction. The U-shaped fixing plate 28 disengages from the T-shaped groove 12 under the cooperation of the sliding block 29 and the inclined slide groove 210. Then, pull out the connecting pipe 11 from the connecting sleeve 21 to complete the disassembly of the independent filter 1, which facilitates the subsequent cleaning, maintenance and storage of the equipment.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A multi-stage filter for food inspection, characterized in that: It includes three independent filters (1), and a connecting component (2) is fixedly connected to the opposite ends of two adjacent independent filters (1), and a support frame (3) is fixedly connected to the opposite sides of two front and rear independent filters (1). The independent filter (1) includes a connecting pipe (11), a valve (13) is fixedly connected to the top of the outer surface of the connecting pipe (11), a filter screen bracket (14) is fixedly connected to the top of the valve (13), a filter cup (17) is slidably inserted into the top of the filter screen bracket (14), and an annular groove (19) is opened at the bottom of the outer surface of the filter cup (17). The outer surface of the filter support (14) is provided with four limiting grooves (141) arranged in an annular array. The inner surface of the limiting groove (141) is slidably connected to a limiting slide plate (142). The top of the limiting slide plate (142) is rotatably connected to a right angle plate (143). The top of the right angle plate (143) is rotatably engaged with the inner side of the annular groove (19). The outer surface of the limiting slide plate (142) is fixedly connected to a threaded plate (144). The outer surfaces of the four threaded plates (144) are threadedly connected to a threaded collar (145).

2. The multi-stage filter for food inspection according to claim 1, characterized in that: Limiting baffles (146) are provided on both the upper and lower sides of the outer surface of the threaded collar (145), and the limiting baffles (146) are fixedly connected to the outer surface of the filter support (14).

3. A multi-stage filter for food inspection according to claim 1, characterized in that: A filter screen (15) is fixedly connected to the inner surface of the filter screen support (14), and a sealing ring (16) is fixedly connected to the top of the filter screen (15).

4. A multi-stage filter for food inspection according to claim 1, characterized in that: The filter cup (17) is provided with a cup lid (18) at the top.

5. A multi-stage filter for food inspection according to claim 1, characterized in that: The outer surface of the connecting pipe (11) has three T-shaped slots (12) arranged in a ring array at both the left and right ends.

6. A multi-stage filter for food inspection according to claim 5, characterized in that: The connecting component (2) includes a connecting sleeve (21), one end of the connecting tube (11) is slidably inserted into the inner surface of the connecting sleeve (21), and three plug plates (22) are fixedly connected in a ring array on both the left and right sides of the inner surface of the connecting sleeve (21), and the plug plates (22) are slidably inserted into the inner surface of the T-shaped slot (12).

7. A multi-stage filter for food inspection according to claim 6, characterized in that: The outer surface of the plug plate (22) is rotatably connected to a drive gear ring (23), and the inner surface of the drive gear ring (23) is connected to three transmission wheels (24) in an annular array. The outer surface of the connecting sleeve (21) is provided with three movable slots in an annular array, and the transmission wheels (24) are rotatably connected inside the movable slots.

8. A multi-stage filter for food inspection according to claim 7, characterized in that: Both sides of the transmission wheel (24) are fixedly connected with transmission screws (25), and the middle of the plug plate (22) is provided with a connecting groove (26) that runs through the front and back. The end of the transmission screw (25) away from the transmission wheel (24) runs through to the inner surface of the connecting groove (26).

9. A multi-stage filter for food inspection according to claim 8, characterized in that: The outer surface of the transmission screw (25) is threaded with an H-shaped slide plate (27). The outer surface of the H-shaped slide plate (27) is slidably connected to the inner surface of the connecting groove (26). Both the front and rear sides of the outer surface of the H-shaped slide plate (27) are slidably connected with U-shaped fixing plates (28). The end of the U-shaped fixing plate (28) away from the H-shaped slide plate (27) extends through to the inner side of the T-shaped slot (12).

10. A multi-stage filter for food inspection according to claim 9, characterized in that: The outer surface of the U-shaped fixing plate (28) is fixedly connected with sliding blocks (29) on both the upper and lower sides. The inner surface of the connecting groove (26) is provided with inclined grooves (210) on both the upper and lower sides. The sliding blocks (29) are slidably connected inside the inclined grooves (210).

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