A sewage pathogen concentration device

Abstract

The application relates to the technical field of pathogen concentration equipment, and particularly discloses a sewage pathogen concentration device which comprises a device body and a conical centrifugal cylinder rotationally connected in the device body, the inside of an extension end is respectively provided with an adapter frame and a connecting frame on the two sides, an installation space for installing a collecting bag is formed between the adapter frame and the connecting frame, fasteners for fixing the collecting bag are slidably connected on the two sides of the bottom of a positioning frame, a trigger is also slidably connected on the positioning frame, and the trigger and the fasteners are transmissionally connected through a linkage. When the conical centrifugal cylinder rotates, centrifugal force drives the trigger to slide away from the conical centrifugal cylinder, and the linkage drives the two fasteners to abut against the two sides of the collecting bag, so that the stability of the collecting bag during work can be further improved, the collecting bag can be prevented from falling off under the action of the centrifugal force, and the collection of the pathogen sample can be smoothly completed.

Description

Technical Field

[0001] This invention relates to the field of pathogen concentration equipment technology, specifically a wastewater pathogen concentration device. Background Technology

[0002] With the development of the times and the continuous improvement of people's living standards, people's requirements for the living environment are also getting higher and higher. With the progress of industrialization, the generation of sewage has become inevitable. Therefore, sewage treatment has received more and more attention. The sewage treatment process is the process of purifying sewage to meet the water quality requirements for discharge into a certain water body or reuse. If sewage is discharged without meeting the qualified standards, the pathogens in the sewage pose a hidden danger to the health of external organisms.

[0003] As is generally known, pathogens refer to microorganisms, parasites, or other vectors (microbial recombinants include hybrids or mutants) that can cause infectious diseases in humans or animals. It is a general term for microorganisms and parasites that can cause diseases, of which microorganisms account for the vast majority. Microorganisms can easily enter the human body through respiration and cause serious diseases.

[0004] To facilitate further treatment or use of wastewater pathogens, a concentration device is used. Existing concentration devices include, for example, Chinese Patent Application No. 201922140471.3, Authorization Announcement No. CN211255908U, entitled "A Microbial Fermentation Concentration Device." This patent discloses a microbial fermentation broth concentration device, including a concentration tank. The concentration tank is a cylindrical structure with a concentration cylinder inside. An inner partition is horizontally arranged on the inner side of the bottom of the tank, and a cover is bolted to its top. A discharge pipe is inserted through one side of the bottom of the inner partition. A drive motor is located at the center of the bottom of the inner partition, and universal balls are evenly arranged along the outer cylindrical direction at the top of the inner partition. The output shaft of the drive motor vertically upwards, passes through the inner partition, and connects to the center of the bottom of the concentration cylinder. In this patent, an ultrafiltration membrane is attached to the inner wall of the concentration cylinder. The drive motor drives the concentration cylinder to rotate, and centrifugal force causes the fermentation broth to adhere tightly to the ultrafiltration membrane, thereby improving concentration efficiency and shortening the concentration time.

[0005] For example, Chinese patent application number 202111253735.1, authorization announcement number CN11382129B, entitled "A Microbial Culture Concentration and Filtration System," discloses a microbial culture concentration and filtration system. This system includes a housing, within which a filter assembly is installed. The filter assembly includes a telescopic component, which is fixedly installed within the housing, and its output end is fixedly mounted with a rotating power component. A support component is fixedly mounted at the end of the output shaft of the rotating power component. An mounting component is fixedly mounted on the center of the support component's surface away from the rotating power component, and a second filter component is fixedly mounted within the mounting component. In this patent, centrifugal force accelerates the separation of water and other components from the microorganisms in the culture medium, effectively improving filtration efficiency. This facilitates subsequent filtration of microorganisms, enabling multiple filtrations and obtaining relatively pure and concentrated microorganisms. It also allows for rapid collection and feeding of the microorganisms.

[0006] It is known that pathogens in wastewater are typically collected through centrifugation using ultrafiltration membranes. To improve centrifugation efficiency, the centrifugation time is usually increased. Existing technologies often incorporate an extension end to allow pathogen samples to remain inside the centrifuge tube for a longer period, further enhancing centrifugation efficiency. To facilitate the collection of centrifuged pathogen samples, a collection structure is usually installed inside the extension end. It is known that the centrifuge tube generates significant centrifugal force during rotation. To prevent the collection structure from being ejected due to this force, it is typically fixed to the centrifuge tube. While this installation method improves the stability of the collection structure during installation and prevents it from failing to accurately collect pathogen samples due to centrifugal force, it also makes it inconvenient to remove the collected pathogen samples after centrifugation, presenting a certain drawback.

[0007] Therefore, it is evident that how to use centrifugal force to fix the collection structure and how to easily and quickly remove the concentrated pathogen sample after the centrifugal force disappears are urgent technical problems that need to be solved. Summary of the Invention

[0008] The purpose of this invention is to provide a wastewater pathogen concentration device to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a wastewater pathogen concentration device, comprising a device body and a conical centrifuge cylinder rotatably connected inside the device body, wherein an extension end is fixedly connected to the conical centrifuge cylinder, and an accumulation space is formed on the inner side of the extension end; both the conical centrifuge cylinder and the extension end are provided with liquid outlet holes, and filter membranes are provided on the inner sides of both the conical centrifuge cylinder and the extension end; a connecting frame and a connecting bracket are respectively provided on both sides inside the extension end, and an installation space for installing a collection bag is formed between the connecting frame and the connecting bracket; multiple sets of fixing mechanisms for fixing the collection bag are provided on the connecting frame, the fixing mechanism including a positioning frame fixedly connected to the connecting frame, and fasteners for fixing the collection bag are slidably connected to both sides of the bottom of the positioning frame, and a trigger element is also slidably connected to the positioning frame, and the trigger element and the fastener are connected by a linkage; when the conical centrifuge cylinder rotates, the centrifugal force generated drives the trigger element to slide away from the conical centrifuge cylinder, and the fasteners are fixed by the linkage.

[0010] Furthermore, the fastener includes two abutment plates slidably connected to the bottom of the positioning frame, each abutment plate is fixedly connected to a connecting rod, and one of the connecting rods is fixedly connected to a fixing plate. The trigger is connected to the fastener through the fixing plate. The linkage includes a linkage rod rotatably connected inside the positioning frame, the linkage rod is equipped with a linkage gear, and each fixing plate is fixedly connected to a linkage rack.

[0011] Furthermore, the triggering element includes a trigger rod fixedly connected to the fixed plate. The trigger rod is slidably connected to the extension end, and a gravity ball is fixed on the trigger rod. When the conical centrifuge rotates, during the stroke of the gravity ball sliding away from the conical centrifuge, the abutment plates on both sides of the bottom of the positioning frame are driven by the linkage to fix the collection bag. A return spring is provided between the gravity ball and the extension end.

[0012] Furthermore, a secondary fixing component is provided inside the positioning frame, and a pressure mechanism is provided between the secondary fixing component and the linkage rod. When the gravity ball slides towards the side closer to the extension end, the pressure mechanism drives the secondary fixing component to fix the collection bag again.

[0013] Furthermore, the secondary fixing component includes a clamping plate slidably connected to the bottom of the positioning frame. Each clamping plate is slidably connected to the clamping plate via a sliding rod, and a force-bearing block is fixedly connected to each sliding rod. A pressure block is vertically slidably connected to the positioning frame, and the pressure block intermittently abuts against the two force-bearing blocks. The pressure mechanism is used to drive the pressure block to slide downward so that the pressure block abuts against the two force-bearing blocks, and the clamping plate is driven by the sliding rod to fix the collection bag.

[0014] Furthermore, the pressure applying mechanism includes a sliding plate vertically slidably connected inside the positioning frame. A drive rack is fixedly connected to the sliding plate, and a drive gear is installed on the linkage rod. The drive gear meshes with the drive rack. A vertical groove is provided on the sliding plate, and the pressure applying block is slidably connected to the sliding plate by means of a limiting block sliding inside the vertical groove. A contact plate is fixedly connected inside the positioning frame, and the contact plate is slidably connected to the sliding plate through the vertical groove. A compression spring is provided between the contact plate and the limiting block. A locking member is provided inside the positioning frame. When the sliding plate drives the pressure applying block to slide upward for a certain distance, the locking member locks the pressure applying block. At this time, the compression spring is in a stored state.

[0015] Furthermore, the locking component includes a locking block slidably connected inside the positioning frame. A locking spring is provided between the locking block and the positioning frame, and a locking groove is provided on the limiting block. The elastic force of the locking spring drives the locking block to engage in the locking groove, fixing the pressure block. The sliding plate is also provided with an unlocking component that drives the locking block to slide out from inside the locking groove. When the sliding plate slides downward, the unlocking component drives the locking block to slide out from inside the locking groove.

[0016] Furthermore, the unlocking component includes a connecting frame mounted on a sliding plate. The connecting frame is slidably connected to an unlocking block via a positioning block. A connecting spring is also provided between the connecting frame and the positioning block. The locking block has a first wedge-shaped surface and a second wedge-shaped surface. The unlocking block intermittently abuts against the first wedge-shaped surface and the second wedge-shaped surface. A snap-fit ​​unit is also provided between the unlocking block and the connecting frame. When the unlocking block abuts against the second wedge-shaped surface, the unlocking block is snapped onto the connecting frame via the snap-fit ​​unit. The snap-fit ​​unit includes a slide rod slidably connected inside the unlocking block. The positioning block has a through groove. The slide rod is slidably connected to the positioning block via the through groove. A pressure spring is also provided between the slide rod and the unlocking block. A locking hole is provided inside the connecting frame. The slide rod is intermittently snapped into the locking hole. An unlocking unit that drives the slide rod to slide out from inside the locking hole is also provided inside the positioning frame.

[0017] Furthermore, the unlocking unit includes an unlocking rod fixedly connected inside the positioning frame, and the sliding rod has an unlocking groove, with the unlocking rod abutting against the unlocking groove.

[0018] Furthermore, a gravity ring is provided at the bottom of the collection bag, and an abutment unit is provided on the positioning frame. The trigger rod is connected to the abutment unit in a transmission manner. When the conical centrifuge rotates, the gravity ball slides away from the conical centrifuge during its stroke, driving the abutment unit to abut against the gravity ring, thereby preventing the collection bag from deforming under the action of centrifugal force.

[0019] Compared with existing technologies, the beneficial effects of this invention are as follows: In actual use, the wastewater pathogen concentration device first installs the collection bag between the connecting frame and the connecting bracket, and uses fasteners to limit the collection bag to prevent it from falling off. Then, the power motor rotates the shaft, which drives the conical centrifuge cylinder to rotate. The centrifugal force generated by the rotation of the conical centrifuge cylinder drives the trigger to slide away from the conical centrifuge cylinder. The linkage drives two fasteners to abut against both sides of the collection bag, thus further improving the stability of the collection bag during operation and preventing it from falling off under centrifugal force, thereby successfully completing the pathogen sample collection. In the above operation, the centrifugal force generated by the rotation of the conical centrifuge cylinder, through the cooperation of the trigger and fasteners, secures the collection bag, eliminating the need for a separate, complex structure to fix the collection bag. Furthermore, the greater the centrifugal force, the more securely the collection bag is fixed, meeting the operational requirements.

[0020] When the conical centrifuge stops rotating, the centrifugal force of the conical centrifuge gradually decreases from large to small until it disappears. At this moment, the fasteners are released from fixing the collection bag, which makes it easy to remove the collection bag from the connecting frame and the connecting bracket, greatly improving the collection efficiency of the concentration device. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall structure from another perspective, provided for an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the conical centrifuge cylinder structure provided in an embodiment of the present invention;

[0025] Figure 4 This is a partial cross-sectional view of the conical centrifuge cylinder provided in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the extension end structure provided in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the installation method of multiple sets of fixing mechanisms provided in the embodiments of the present invention;

[0028] Figure 7 This is a schematic diagram of the installation method of the positioning frame and the collection bag provided in an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram illustrating the connection between the inside of the positioning frame and the collection bag provided in an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the trigger structure provided in an embodiment of the present invention;

[0031] Figure 10 This is a partial structural diagram of the linkage component provided in an embodiment of the present invention;

[0032] Figure 11 This is a schematic diagram of the secondary fastener installation method provided in an embodiment of the present invention;

[0033] Figure 12 This is a partial structural diagram of the pressure applying mechanism provided in an embodiment of the present invention;

[0034] Figure 13 This is a schematic diagram of the locking element snapping into the locking groove according to an embodiment of the present invention;

[0035] Figure 14 This is a schematic diagram of the installation method of the unlocking component provided in an embodiment of the present invention;

[0036] Figure 15 This is a partial structural diagram of the unlocking component provided in an embodiment of the present invention;

[0037] Figure 16 This is a schematic diagram of the unlocking block and connection installation method provided in an embodiment of the present invention;

[0038] Figure 17 This is a schematic diagram of the exploded state of the snap-fit ​​unit provided in an embodiment of the present invention;

[0039] Figure 18 This is a schematic diagram from another perspective of the exploding state of the snap-fit ​​unit provided in an embodiment of the present invention;

[0040] Figure 19 This is a schematic diagram of the unlocking block structure provided in an embodiment of the present invention;

[0041] Figure 20 This is a schematic diagram of the unlocking rod structure provided in an embodiment of the present invention;

[0042] Figure 21 This is a cross-sectional view of the collection bag, connecting frame, and connecting bracket when separated, as provided in an embodiment of the present invention.

[0043] Figure 22 This is a partial structural diagram of the abutment unit provided in an embodiment of the present invention.

[0044] Explanation of reference numerals in the attached drawings: 1. Equipment body; 2. Conical centrifuge cylinder; 3. Drainage channel; 4. Power shaft; 5. Extension end; 6. Connecting frame; 7. Connecting bracket; 8. Collection bag; 9. Positioning frame; 10. Trigger; 101. Trigger rod; 102. Gravity ball; 103. Return spring; 11. Fastener; 111. Abutment plate; 112. Connecting rod; 113. Fixing plate; 12. Linkage component; 121. Linkage rod; 122. Linkage gear; 123. Linkage rack; 13. Secondary fixing component; 131. Abutment plate; 132. Sliding rod; 133. Force-bearing block; 134. Pressure block; 135. Positioning spring; 14. Pressure mechanism; 141. Sliding plate; 142. 143. Drive gear; 144. Drive rack; 145. Vertical groove; 146. Limiting block; 147. Compression spring; 148. Contact plate; 15. Locking component; 151. Locking block; 152. Locking groove; 153. Locking spring; 16. Unlocking component; 161. Connecting frame; 162. Unlocking block; 163. Connecting spring; 164. Positioning block; 165. Through groove; 166. Slide rod; 167. Compression spring; 168. Locking hole; 169. First wedge surface; 1610. Second wedge surface; 17. Unlocking unit; 171. Unlocking rod; 172. Unlocking groove; 18. Gravity ring; 19. Protrusion; 20. Guide plate; 21. Power block; 22. Guide unit. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Please see Figures 1-22 This invention provides a technical solution: a wastewater pathogen concentration device, comprising a device body 1 and a conical centrifuge cylinder 2 rotatably connected inside the device body 1. A drain channel 3 is provided on the device body 1, and a valve is installed on the drain channel 3 for discharging liquid from inside the device body 1. Specifically, a power motor is installed at the bottom of the device body 1, and the power motor is connected to the conical centrifuge cylinder 2 via a power shaft 4. In use, the mixed wastewater sample is poured into the conical centrifuge cylinder 2. When in use, the power motor is started, and the power motor's rotating shaft rotates, driving the conical centrifuge cylinder 2 to rotate via the power shaft 4. This enables the centrifugal concentration of the wastewater sample inside the conical centrifuge cylinder 2. Furthermore, as the conical centrifuge cylinder 2 rotates, under the action of centrifugal force, the pathogens in the wastewater sample will move obliquely upwards along the conical centrifuge cylinder 2, thereby increasing the centrifugation time and improving centrifugation efficiency.

[0047] An extension end 5 is fixedly connected to the conical centrifuge tube 2. An aggregation space is formed inside the extension end 5. Preferably, the aggregation space is arc-shaped. Therefore, pathogen samples will move obliquely upward from the conical centrifuge tube 2 into the aggregation space of the extension end 5, thereby further increasing the centrifugation time. Thus, within a predetermined time during which the power shaft 4 drives the conical centrifuge tube 2 to rotate, pathogen samples will remain in the conical centrifuge tube 2 and inside the extension end 5 for a longer period of time, thereby improving the efficiency of centrifugation concentration.

[0048] Both the conical centrifuge tube 2 and the extension end 5 have liquid outlet holes, and both the conical centrifuge tube 2 and the extension end 5 have filter membranes installed on their inner sides. Specifically, the filter membrane can be an ultrafiltration membrane, etc., which is existing technology and its structure will not be described in detail here. At this moment, when the conical centrifuge tube 2 rotates, the wastewater liquid will be discharged through the filter membrane and the liquid outlet holes, and the filter membrane will filter and concentrate the pathogen sample.

[0049] The extension end 5 has a connecting frame 6 and a connecting frame 7 on both sides, forming an installation space for the collection bag 8. The collection bag 8 is located below the accumulation space, so after the pathogen samples are concentrated and accumulated, they will fall into the collection bag 8 due to gravity, thus achieving the collection of pathogen samples. Specifically, the collection bag 8 can be made of various flexible materials, making it easier to install between the connecting frame 6 and the connecting frame 7, thereby improving the working efficiency of the concentration device.

[0050] Furthermore, multiple fixing mechanisms for securing the collection bag 8 are provided on the connecting frame 6. These mechanisms share the same structure and working principle, and only one will be described in detail here. Specifically, the fixing mechanism includes a positioning frame 9 fixedly connected to the connecting frame 6. Fasteners 11 for securing the collection bag 8 are slidably connected to both sides of the bottom of the positioning frame 9. The two fasteners 11 abut against the sides of the collection bag 8, thus further improving the stability of the collection bag 8 during operation and preventing it from falling off under centrifugal force. A trigger 10 is also slidably connected to the positioning frame 9, and this trigger 10 is slidably connected to the extension end 5. When the conical centrifuge cylinder 2 rotates, the centrifugal force drives the trigger 10 to slide away from the extension end 5. The trigger 10 and the fasteners 11 are connected via a linkage 12, which drives the fasteners 11 to secure the collection bag 8.

[0051] Specifically, in actual use, the collection bag 8 is first installed between the connecting frame 6 and the connecting frame 7, and the collection bag 8 is limited by the fasteners 11 to prevent it from falling off. Then, the power motor is started to rotate the shaft, which drives the conical centrifuge cylinder 2 to rotate. When the conical centrifuge cylinder 2 rotates, the centrifugal force generated by the rotation of the conical centrifuge cylinder 2 drives the trigger 10 to slide away from the conical centrifuge cylinder 2. The linkage 12 drives the two fasteners 11 to abut against the two sides of the collection bag 8 respectively. Therefore, the stability of the collection bag 8 during operation can be further improved, preventing the collection bag 8 from falling off under the action of centrifugal force, thus enabling the smooth collection of pathogen samples. In the above operation, the centrifugal force generated by the rotation of the conical centrifuge cylinder 2 is used to fix the collection bag 8 through the cooperation between the trigger 10 and the fasteners 11, without the need for a separate complex structure to fix the collection bag 8. In the above operation, the greater the centrifugal force, the more stable the fixation of the collection bag 8 will be, meeting the needs of the operation. At this moment, when the conical centrifuge 2 stops rotating, the centrifugal force of the conical centrifuge 2 gradually decreases from large to small until it disappears. At this moment, the fastener 11 is released from fixing the collection bag 8, which makes it easy to remove the collection bag 8 from the connecting frame 6 and the connecting frame 7, greatly improving the collection efficiency of the concentration device.

[0052] In the embodiments provided by the present invention, the fastener 11 includes two abutment plates 111 slidably connected to the bottom of the positioning frame 9. Specifically, the shape of the abutment plates 111 is adapted to the shape of the connecting frame 6 and the connecting frame 7, thereby facilitating the fixing of the collection bag 8. Each abutment plate 111 is fixedly connected to a connecting rod 112, and one of the connecting rods 112 is fixedly connected to a fixing plate 113. The trigger 10 is connected to the fastener 11 through the fixing plate 113. More specifically, multiple sets of fitting grooves are provided at the bottom of the positioning frame 9 to facilitate the sliding of the abutment plates 111. The linkage 12 includes a linkage rod 121 rotatably connected inside the positioning frame 9. A linkage gear 122 is installed on the linkage rod 121, and a linkage rack 123 is fixedly connected to each fixed plate 113. The trigger 10 includes a trigger rod 101 fixedly connected to the fixed plate 113. The trigger rod 101 is slidably connected to the extension end 5, and a gravity ball 102 is fixed on the trigger rod 101. When the conical centrifuge 2 rotates, the gravity ball 102 slides away from the conical centrifuge 2, and the linkage 12 drives the abutment plates 111 on both sides of the bottom of the positioning frame 9 to fix the collection bag 8. Specifically, in actual use, when the conical centrifuge tube 2 rotates, it generates centrifugal force. When the centrifugal force generated by the rotation of the conical centrifuge tube 2 is greater than other forces acting on the gravity ball 102, the gravity ball 102 will slide away from the extension end 5. When the gravity ball 102 slides on the extension end 5, it will drive the fixing plate 113 to slide through the trigger rod 101. At this time, the fixing plate 113 will drive the linkage rack 123 to slide inside the positioning frame 9 during the sliding stroke. Under the force of the linkage gear 122, the other linkage rack 123 will also slide inside the positioning frame 9. Therefore, the two linkage racks 123 can respectively drive the abutment plate 111 to fix the collection bag 8, thus further improving the stability of the collection bag 8 during operation and preventing the collection bag 8 from falling off under the action of centrifugal force, thereby successfully completing the collection of pathogen samples. Furthermore, during the above operation, the centrifugal force generated when the conical centrifuge 2 rotates is used to fix the collection bag 8 through the cooperation between the trigger 10 and the fastener 11, etc., without the need to set up a complicated structure to fix the collection bag 8 separately.

[0053] Meanwhile, a return spring 103 is provided between the gravity ball 102 and the extension end 5. Specifically, the elastic force of the return spring 103 drives the gravity ball 102 to slide towards the side closer to the extension end 5. When the centrifugal force generated by the rotation of the conical centrifuge cylinder 2 is greater than the elastic force of the return spring 103, the gravity ball 102 will slide away from the extension end 5. Conversely, when the power motor stops, the centrifugal force generated by the rotation of the conical centrifuge cylinder 2 will decrease. At this time, the return spring 103 drives the gravity ball 102 to slide towards the side closer to the extension end 5 during the process of restoring its elastic deformation. During this process, the two abutment plates 111 can be released from fixing the collection bag 8 through the cooperation of the rack and pinion and the linkage gear 122, which makes it convenient to remove the collection bag 8 from the connecting frame 6 and the connecting frame 7, greatly improving the collection efficiency of the concentration device and making the use effect better.

[0054] Specifically, from the moment the power motor stops, the centrifugal force generated by the rotation of the conical centrifuge drum 2 will begin to decrease. At this moment, the gravity ball 102 will tend to slide towards the extension end 5, meaning that the fastener 11 will gradually release its restraint on the collection bag 8. However, the centrifugal force generated by the rotation of the conical centrifuge drum 2 at this time still has the potential to cause the collection bag 8 to fly away.

[0055] Therefore, in another embodiment of the present invention, a secondary fixing member 13 is also provided inside the positioning frame 9. A pressure applying mechanism 14 is provided between the secondary fixing member 13 and the linkage rod 121. When the gravity ball 102 slides towards the side closer to the extension end 5, the pressure applying mechanism 14 drives the secondary fixing member 13 to fix the collection bag 8 again. That is, after the power motor stops and the speed of the conical centrifuge 2 decreases, the gravity ball 102 will drive the secondary fixing member 13 to fix the collection bag 8 again during its sliding stroke towards the side closer to the extension end 5. This can prevent the collection bag 8 from flying off due to the weakening of the force exerted by the fastener 11 on the collection bag 8, resulting in better performance.

[0056] In the embodiments provided by the present invention, the secondary fixing member 13 includes a clamping plate 131 slidably connected to the bottom of the positioning frame 9. Each clamping plate 131 is slidably connected to an abutment plate 111 via a sliding rod 132. Specifically, a positioning spring 135 is provided between each clamping plate 131 and its corresponding abutment plate 111. The elastic force of the positioning spring 135 drives the clamping plate 131 and the abutment plate 111 to move away from each other. Therefore, when the conical centrifuge cylinder 2 is stationary, the abutment plate 111 is stationary, and the elastic force of the positioning spring 135 drives the clamping plate 131 to contact the collection bag 8. At this time, the collection bag 8 can be installed between the connecting frame 7 and the connecting frame 6 when the conical centrifuge cylinder 2 is stationary, which can improve the stability of the collection bag 8 during installation and prevent the collection bag 8 from slipping during installation. In addition, a force-bearing block 133 is fixedly connected to each sliding rod 132, and a pressure block 134 is vertically slidably connected to the positioning frame 9. The pressure block 134 intermittently abuts against the two force-bearing blocks 133. When the pressure block 134 slides downward and comes into contact with the two force-bearing blocks 133, the collection bag 8 can be fixed by the clamping plate 131. The pressure mechanism 14 is used to drive the pressure block 134 to slide downward so that the pressure block 134 comes into contact with the two force-bearing blocks 133, and the clamping plate 131 is driven by the sliding rod 132 to fix the collection bag 8.

[0057] Specifically, the secondary fastener 13 will generate two working states during operation:

[0058] First, when the conical centrifuge cylinder 2 is stationary, the abutment plate 111 is also stationary. The elastic force of the positioning spring 135 drives the abutment plate 131 to contact the collection bag 8, which can improve the stability of the collection bag 8 during installation and prevent the collection bag 8 from slipping during installation. During the rotation of the conical centrifuge 2, the gravity ball 102 will slide away from the extension end 5. When the gravity ball 102 slides on the extension end 5, it will drive the fixed plate 113 to slide through the trigger rod 101. At this time, the fixed plate 113 will drive the linkage rack 123 to slide inside the positioning frame 9 during the sliding stroke. Under the force of the linkage gear 122, the other linkage rack 123 will also slide inside the positioning frame 9. Therefore, the two linkage racks 123 can drive the abutment plate 111 to fix the collection bag 8. During this process, when the abutment plate 111 is subjected to the force of the linkage rack 123, it will squeeze the positioning spring 135. The positioning spring 135 will drive the clamping plate 131 to contact the collection bag 8, and the clamping plate 131 will fix the collection bag 8, thereby improving the stability of the collection bag 8 during operation.

[0059] Second, when the power motor stops, the gravity ball 102 slides towards the extension end 5 under the force of the return spring 103, etc. Under the influence of the linkage 12, etc., the limiting force of the abutment plate 111 on the clamping plate 131 is reduced (that is, the squeezing force on the collection bag 8 is reduced). During the stroke of the gravity ball 102 sliding towards the extension end 5, the pressure block 134 is driven to slide downward by the pressure mechanism 14. When the pressure block 134 slides downward and abuts against the two force blocks 133, the collection bag 8 can be fixed again by the clamping plate 131, avoiding the risk of the collection bag 8 falling off due to the reduction of the squeezing force on the collection bag 8, thus meeting the work requirements.

[0060] In the embodiments provided by the present invention, the pressure applying mechanism 14 includes a sliding plate 141 vertically slidably connected inside the positioning frame 9. Specifically, a groove adapted to the sliding plate 141 is provided inside the positioning frame 9, which can improve the stability of the sliding plate 141 when sliding. A driving rack 143 is fixedly connected to the sliding plate 141, and a driving gear 142 is installed on the linkage rod 121. The driving gear 142 meshes with the driving rack 143. Therefore, when the linkage rod 121 rotates, the sliding plate 141 will slide through the cooperation of the driving gear 142 and the driving rack 143. At this moment, when the conical centrifuge 2 rotates, it will generate centrifugal force. When the centrifugal force generated by the rotation of the conical centrifuge 2 is greater than the other forces acting on the gravity ball 102, the gravity ball 102 will slide away from the extension end 5. When the gravity ball 102 slides on the extension end 5, it will drive the fixed plate 113 to slide through the trigger rod 101. At this moment, the fixed plate 113 will drive the linkage rack 123 to slide inside the positioning frame 9 during the sliding stroke. At this moment, it will drive the linkage rod 121 to rotate passively through the linkage gear 122. When the linkage rod 121 rotates, the cooperation between the drive gear 142 and the drive rack 143 will drive the sliding plate 141 to slide upward. The sliding plate 141 has a vertical groove 144. The pressure block 134 is slidably connected to the sliding plate 141 by sliding within the vertical groove 144 via a limiting block 145. A contact plate 147 is fixedly connected inside the positioning frame 9, and the contact plate 147 is slidably connected to the sliding plate 141 via the vertical groove 144. A compression spring 146 is provided between the contact plate 147 and the limiting block 145. Therefore, when the sliding plate 141 slides upward, it drives the limiting block 145 to slide upward within the vertical groove 144. Since the contact plate 147 is stationary, the upward sliding of the sliding plate 141 causes the compression spring 146 to deform. At the same time, a locking member 15 is provided inside the positioning frame 9. After the sliding plate 141 drives the pressure block 134 to slide upward a certain distance, the locking member 15 locks the pressure block 134, and the compression spring 146 is in a stored state. At this moment, if the pressure block 134 is unlocked, the compression spring 146 will push the pressure block 134 to slide down quickly during the process of restoring its elastic deformation. After the pressure block 134 slides down and abuts against the two force blocks 133, the collection bag 8 can be fixed again by the clamping plate 131, avoiding the risk of the collection bag 8 falling off due to the reduction of the squeezing pressure on the collection bag 8, thus meeting the work requirements.

[0061] In the embodiments provided by the present invention, specifically, the locking member 15 includes a locking block 151 slidably connected inside the positioning frame 9. The locking block 151 has an abutment surface, which is wedge-shaped to facilitate fixing the pressure block 134. A locking spring 153 is provided between the locking block 151 and the positioning frame 9. Preferably, a telescopic rod is provided inside the positioning frame 9, wherein the locking spring 153 is installed inside the telescopic rod, thereby improving the stability of the locking block 151 when sliding. Furthermore, a locking groove 152 is provided on the limiting block 145, and the elastic force of the locking spring 153 drives the locking block 151 to engage in the locking groove 152, thereby fixing the pressure block 134. Specifically, when the gravity ball 102 slides on one side of the extension end 5, it will drive the fixed plate 113 to slide through the trigger rod 101. At this time, the fixed plate 113 will drive the linkage rack 123 to slide inside the positioning frame 9 during its sliding stroke. At this time, the linkage rod 121 will be passively rotated through the linkage gear 122. When the linkage rod 121 rotates, the cooperation between the drive gear 142 and the drive rack 143 will drive the sliding plate 141 to slide upward. Therefore, when the sliding plate 141 slides upward, the sliding plate 141 drives the limiting block 145 to slide upward inside the vertical groove 144. Since the contact plate 147 is stationary, when the sliding plate 141 slides upward to the predetermined position, the limiting block 145 presses against the locking block 151, causing the locking block 151 to overcome the elastic force of the locking spring 153 and be driven inside the positioning frame 9. This continues until the locking groove 152 on the limiting block 145 slides to the position of the locking block 151. During the recovery of elastic deformation, the locking spring 153 drives the locking block 151 to engage in the locking groove 152, fixing the limiting block 145. During the upward sliding stroke of the sliding plate 141, the compression spring 146 deforms. Specifically, the elastic coefficient of the compression spring 146 is greater than that of the locking spring 153. Therefore, when the limiting block 145 slides upward, it can overcome the elastic force of the locking spring 153, allowing the locking block 151 to slide inside the positioning frame 9.

[0062] In this embodiment, the sliding plate 141 is also provided with an unlocking member 16 that drives the locking block 151 to slide out of the locking groove 152. During the downward sliding stroke of the sliding plate 141, the locking block 151 is passively slid out of the locking groove 152. In actual use, when the sliding plate 141 slides downward, the unlocking member 16 drives the locking block 151 to slide out of the locking groove 152. That is, after the compression spring 146 is released, the compression spring 146 will restore its elastic deformation, driving the pressure block 134 to slide downward quickly. After the pressure block 134 slides downward and abuts against the two force-bearing blocks 133, the collection bag 8 can be fixed again by the clamping plate 131, resulting in better performance.

[0063] In the embodiments provided by the present invention, the unlocking component 16 includes a connecting frame 161 mounted on a sliding plate 141. When the sliding plate 141 slides upward, it drives the connecting frame 161 to slide upward as well. An unlocking block 162 is slidably connected to the connecting frame 161 via a positioning block 164. A connecting spring 163 is also provided between the connecting frame 161 and the positioning block 164, and the elastic force of the connecting spring 163 drives the unlocking block 162 to a predetermined state. The locking block 151 has a first wedge-shaped surface 169 and a second wedge-shaped surface 1610, and the unlocking block 162 intermittently abuts against the first wedge-shaped surface 169 and the second wedge-shaped surface 1610. Specifically, the locking block 151 has an inclined groove, and the first wedge-shaped surface 169 and the second wedge-shaped surface 1610 are located on both sides of the inclined groove. A latching unit is also provided between the unlocking block 162 and the connecting frame 161. When the unlocking block 162 abuts against the second wedge-shaped surface 1610, the unlocking block 162 is latched onto the connecting frame 161 by the latching unit. When the latching unit is latched onto the connecting frame 161, the downward sliding of the connecting frame 161 will cause the unlocking block 162 to slide downward as well, cooperating with the second wedge-shaped surface 1610 to drive the locking block 151 to slide out from the locking groove 152. When the latching unit is not latched onto the connecting frame 161, the unlocking block 162 is slidably connected to the connecting frame 161. If the unlocking block 162 is driven to abut against the second wedge-shaped surface 1610 at this time, the locking block 151 cannot be driven to slide out from the locking groove 152. The locking unit includes a slide rod 166 slidably connected inside the unlocking block 162. A through groove 165 is provided on the positioning block 164. The slide rod 166 is slidably connected to the positioning block 164 through the through groove 165. A pressure spring 167 is also provided between the slide rod 166 and the unlocking block 162. A locking hole 168 is provided inside the connecting frame 161. The slide rod 166 is intermittently locked in the locking hole 168. When the slide rod 166 is locked in the locking hole 168, the state of the unlocking block 162 can be fixed, and the unlocking block 162 can no longer slide inside the connecting frame 161. Specifically, during use, after the sliding plate 141 slides upward a certain distance, the unlocking block 162 will slide inside the inclined groove on the locking block 151. More specifically, the unlocking block 162 will abut against the first wedge-shaped surface 169. As the sliding plate 141 continues to slide upward, the unlocking block 162 will slide on the connecting frame 161 under the wedge-shaped action of the first wedge-shaped surface 169. When the unlocking block 162 slides, it will cause the unlocking block 162 to slide inside the connecting frame 161, causing the connecting spring 163 to deform, that is, the connecting spring 163 will generate elastic force. When the sliding plate 141 slides upward to a predetermined position, the unlocking block 162 will move to contact the second wedge-shaped surface 1610, and the pressure spring 167 will drive the latching rod to engage in the locking hole 168.In this state, when the sliding plate 141 slides downward, the locking block 151 is driven to slide out of the locking groove 152 by the cooperation of the unlocking block 162 and the second wedge surface 1610. That is, after the compression spring 146 is released, the compression spring 146 will drive the pressure block 134 to slide downward quickly during the process of restoring its elastic deformation. After the pressure block 134 slides downward and abuts against the two force blocks 133, the collection bag 8 can be fixed again by the clamping plate 131, and the use effect is better.

[0064] Specifically, the positioning frame 9 also includes an unlocking unit 17 that drives the sliding rod 166 to slide out of the locking hole 168. By setting the unlocking unit 17, the locking rod can slide out of the locking hole 168, thus unlocking the state of the unlocking block 162, avoiding motion interference when the sliding plate 141 slides upward, and facilitating the next sliding of the locking block 151 out of the locking groove 152. Specifically, the unlocking unit 17 includes an unlocking rod 171 fixedly connected inside the positioning frame 9, and an unlocking groove 172 is provided on the sliding rod 132, with the unlocking rod 171 abutting against the unlocking groove 172. Furthermore, both the unlocking groove 172 and the unlocking rod 171 are wedge-shaped. When the sliding plate 141 slides down to the predetermined position, the unlocking groove 172 contacts the unlocking rod 171, causing the locking rod to slide away from the locking hole 168. This causes the locking rod to slide out of the locking hole 168. Then, the elastic force of the connecting spring 163 causes the unlocking block 162 to slide inside the connecting frame 161, making it easier to drive the unlocking block 162 to abut against the first wedge-shaped surface 169 again, repeating the cycle.

[0065] In the embodiments provided by the present invention, a gravity ring 18 is further provided at the bottom of the collection bag 8, and an abutment unit is further provided on the positioning frame 9. The trigger rod 101 is connected to the abutment unit in a transmission manner. When the conical centrifuge cylinder 2 rotates, the gravity ball 102 slides away from the conical centrifuge cylinder 2, driving the abutment unit to abut against the gravity ring 18 during its stroke, thereby preventing the collection bag 8 from deforming under the action of centrifugal force. Specifically, the abutment unit includes a guide plate 20 slidably connected to the positioning frame 9, and a guide unit 22 is provided between the guide plate 20 and the positioning frame 9. A power block 21 is fixedly connected to the trigger rod 101, and an arc-shaped groove adapted to the power block 21 is opened on the guide plate 20. At the same time, a protrusion 19 is fixedly connected to the gravity ring 18. During use, when the gravity ball 102 slides, it will drive the trigger rod 101 to slide, and the power block 21 will drive the guide plate 20 to slide and abut against the protrusion 19. At this time, it can prevent the accumulation of pathogen samples at the bottom of the collection bag 8, thus facilitating the unloading of the collected pathogen samples and improving the use effect.

[0066] In the embodiments provided by the present invention, the cross-sections of the connecting frame 7 and the connecting frame 6 are conical. When the collection bag 8 is installed between the connecting frame 7 and the connecting frame 6, the cross-section of the collection bag 8 is also conical, so as to prevent the pathogen samples inside the collection bag 8 from being thrown out under the action of centrifugal force.

[0067] Furthermore, Velcro is provided on both sides inside the collection bag 8, specifically a snap fastener. Therefore, when the collection bag 8 passes through the connecting frame 7 and the connecting frame 6, the Velcro can stick the opening of the collection bag 8 together, which can temporarily store pathogen samples and improve the performance.

[0068] It should be noted that all electrical equipment involved in this application can be powered by batteries or external power sources.

[0069] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0070] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater pathogen concentration device, comprising a device body (1) and a conical centrifuge cylinder (2) rotatably connected inside the device body (1), characterized in that: An extension end (5) is fixedly connected to the conical centrifuge tube (2), and an accumulation space is formed inside the extension end (5); The conical centrifuge tube (2) and the extension end (5) are both provided with liquid outlet holes, and the conical centrifuge tube (2) and the extension end (5) are both provided with filter membranes on the inner side. The extension end (5) has a connecting frame (6) and a connecting frame (7) respectively on both sides inside, and the connecting frame (6) and the connecting frame (7) form an installation space for installing the collection bag (8); The connecting frame (6) is provided with multiple sets of fixing mechanisms for fixing the collection bag (8). The fixing mechanism includes a positioning frame (9) fixedly connected to the connecting frame (6), and fasteners (11) for fixing the collection bag (8) are slidably connected on both sides of the bottom of the positioning frame (9). A trigger (10) is also slidably connected on the positioning frame (9). The trigger (10) and the fastener (11) are connected by a linkage (12). When the conical centrifuge tube (2) rotates, the centrifugal force generated drives the trigger (10) to slide away from the conical centrifuge tube (2), and the fastener (11) is driven by the linkage (12) to fix the collection bag (8); The fastener (11) includes two abutment plates (111) slidably connected to the bottom of the positioning frame (9). Each abutment plate (111) is fixedly connected to a connecting rod (112), and a fixing plate (113) is fixedly connected to one of the connecting rods (112). The trigger (10) is connected to the fastener (11) through the fixing plate (113). The linkage component (12) includes a linkage rod (121) rotatably connected inside the positioning frame (9), a linkage gear (122) is installed on the linkage rod (121), and a linkage rack (123) is fixedly connected to each fixed plate (113). The trigger (10) includes a trigger rod (101) fixedly connected to the fixed plate (113), the trigger rod (101) is slidably connected to the extension end (5), and a gravity ball (102) is fixed on the trigger rod (101). When the conical centrifuge tube (2) rotates, during the stroke of the gravity ball (102) sliding away from the conical centrifuge tube (2), the connecting plate (111) on both sides of the bottom of the positioning frame (9) is driven by the linkage (12) to fix the collection bag (8), and a reset spring (103) is provided between the gravity ball (102) and the extension end (5).

2. The wastewater pathogen concentration device according to claim 1, characterized in that: The positioning frame (9) is also provided with a secondary fixing component (13), and a pressure applying mechanism (14) is provided between the secondary fixing component (13) and the linkage rod (121). When the gravity ball (102) slides toward the side closer to the extension end (5), the pressure mechanism (14) drives the secondary fixing member (13) to fix the collection bag (8) again.

3. The wastewater pathogen concentration device according to claim 2, characterized in that: The secondary fixing component (13) includes a retaining plate (131) slidably connected to the bottom of the positioning frame (9). Each retaining plate (131) is slidably connected to the abutting plate (111) via a sliding rod (132), and a force-bearing block (133) is fixedly connected to each sliding rod (132). A pressure block (134) is vertically slidably connected to the positioning frame (9), and the pressure block (134) intermittently abuts against the two force-bearing blocks (133); The pressure-applying mechanism (14) is used to drive the pressure-applying block (134) to slide downward so that the pressure-applying block (134) abuts against the two force-bearing blocks (133), and the sliding rod (132) drives the clamping plate (131) to fix the collection bag (8).

4. The wastewater pathogen concentration device according to claim 3, characterized in that: The pressure application mechanism (14) includes a sliding plate (141) that is vertically slidably connected inside the positioning frame (9). A drive rack (143) is fixedly connected to the sliding plate (141), and a drive gear (142) is installed on the linkage rod (121). The drive gear (142) meshes with the drive rack (143). The sliding plate (141) is provided with a vertical groove (144). The pressure block (134) is slidably connected to the sliding plate (141) by means of the limiting block (145) sliding inside the vertical groove (144). A contact plate (147) is fixedly connected inside the positioning frame (9). The contact plate (147) is slidably connected to the sliding plate (141) by means of the vertical groove (144). A compression spring (146) is provided between the contact plate (147) and the limiting block (145). The positioning frame (9) is equipped with a locking element (15). When the sliding plate (141) drives the pressure block (134) to slide upward for a certain distance, the locking element (15) locks the pressure block (134). At this time, the compression spring (146) is in a stored state.

5. A wastewater pathogen concentration device according to claim 4, characterized in that: The locking component (15) includes a locking block (151) that is slidably connected inside the positioning frame (9). A locking spring (153) is provided between the locking block (151) and the positioning frame (9), and a locking groove (152) is provided on the limiting block (145). The elastic force of the locking spring (153) drives the locking block (151) to engage in the locking groove (152) to fix the pressure block (134). Furthermore, the sliding plate (141) is also provided with an unlocking component (16) that drives the locking block (151) to slide out from inside the locking groove (152); When the sliding plate (141) slides down, the locking block (151) is driven out of the locking groove (152) by the unlocking element (16).

6. The wastewater pathogen concentration device according to claim 5, characterized in that: The unlocking component (16) includes a connecting frame (161) mounted on a sliding plate (141). The connecting frame (161) is slidably connected to an unlocking block (162) via a positioning block (164). A connecting spring (163) is also provided between the connecting frame (161) and the positioning block (164). The locking block (151) is provided with a first wedge-shaped surface (169) and a second wedge-shaped surface (1610), and the unlocking block (162) intermittently abuts against the first wedge-shaped surface (169) and the second wedge-shaped surface (1610); A snap-fit ​​unit is also provided between the unlocking block (162) and the connecting frame (161). When the unlocking block (162) abuts against the second wedge surface (1610), the unlocking block (162) is snapped onto the connecting frame (161) by the snap-fit ​​unit. The snap-fit ​​unit includes a slide rod (166) slidably connected inside the unlocking block (162). The positioning block (164) has a through groove (165). The slide rod (166) is slidably connected to the positioning block (164) through the through groove (165). A pressure spring (167) is also provided between the slide rod (166) and the unlocking block (162). The connecting frame (161) has a locking hole (168) inside. The slide rod (166) is intermittently snapped into the locking hole (168). The positioning frame (9) is also provided with an unlocking unit (17) that drives the slide bar (166) to slide out from the locking hole (168).

7. The wastewater pathogen concentration device according to claim 6, characterized in that: The unlocking unit (17) includes an unlocking rod (171) fixedly connected inside the positioning frame (9), and an unlocking groove (172) is provided on the sliding rod (132), and the unlocking rod (171) and the unlocking groove (172) abut against each other.

8. The wastewater pathogen concentration device according to claim 2, characterized in that: The bottom of the collection bag (8) is also provided with a gravity ring (18), and the positioning frame (9) is also provided with an abutting unit. The trigger rod (101) is connected to the abutting unit in a transmission manner. When the conical centrifuge tube (2) rotates, the gravity ball (102) slides away from the conical centrifuge tube (2) during its stroke, driving the contact unit to contact the gravity ring (18) to prevent the collection bag (8) from deforming under the action of centrifugal force.

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