Sampling cup for biological aerosol wet wall cyclone sampler

Abstract

A sampling cup for a biological aerosol wet wall cyclone sampler comprises a cup base, an inner container and a shell, an air inlet is formed in the side wall of the cup base, a partition plate is arranged in the cup base to seal the cup base, an air outlet pipe is arranged in the middle of the partition plate, buckles and positioning protruding blocks are evenly arranged at the bottom of the inner wall of the cup base, and pin grooves are formed in the top faces of the buckles; a notch matched with the air inlet in the cup base in position and size is formed in the top of the side wall of the inner container; a positioning rotation-stopping groove is formed in the inner wall of the top of the shell, an L-shaped inserting opening and a positioning groove are formed in the outer wall of the top of the shell, the buckle on the cup base can be screwed into the transverse groove after being inserted into the vertical groove of the L-shaped inserting opening, and a pin matched with the pin groove is arranged at the top of the transverse groove. The sampling cup can be taken down and installed more quickly, and the situation of mistaken touch is also reduced; and the shell can play a role in protection, so that the inner container is prevented from being damaged due to collision with other parts in the working process.

Description

Technical Field

[0001] The utility model belongs to the technical field of samplers, and particularly relates to a device for quickly replacing a sampling cup. Background Art

[0002] A patent with the application number CN2023105986745 discloses a wet-wall cyclone sampler for bioaerosols, which can quickly and efficiently extract samples from ambient air. When sampling with this sampler, an appropriate amount of sampling liquid needs to be stored in advance in the cyclone cup, and the sampling liquid needs to be continuously replaced to perform bioaerosol sampling. This process requires manual operation to unscrew the cyclone cup installed by threads, replace the sampling liquid, and then screw it back into the cup holder. Such an operation method is difficult to implement in a sampler with a narrow structure, and it is also easy to accidentally touch other components in the sampler during the screwing process, causing damage. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a sampling cup for a wet-wall cyclone sampler for bioaerosols, which is convenient for replacing and installing the sampling liquid during the operation of the sampler.

[0004] A sampling cup for a wet-wall cyclone sampler for bioaerosols, characterized in that it includes a cup holder, an inner liner, and an outer shell made of a plastically deformable material. The cup holder is a circular tubular structure, and four fixed mounting holes are evenly arranged on the outer periphery of its top. An air inlet is opened on the side wall of the cup holder. A partition is arranged inside the cup holder to enclose it, and an air outlet pipe is opened in the middle of the partition. The air outlet pipe is connected to the air power device of the sampler. The partition is higher than the top surface of the air inlet, and the bottom surface of the air outlet pipe is lower than the bottom surface of the air inlet. Clasps and positioning bumps are evenly arranged at the bottom of the inner wall of the cup holder, and a pin groove is arranged on the top surface of the clasp.

[0005] The upper part of the inner liner is circular tubular, and its outer diameter matches the inner diameter of the cup holder. A positioning anti-rotation rib is arranged at the bottom of its outer wall, and a notch matching the position and size of the air inlet on the cup holder is opened at the top of the side wall. The lower part of the inner liner is conical, and its height is not greater than the height of the outer shell.

[0006] A positioning anti-rotation groove matching the positioning anti-rotation rib of the inner liner is arranged on the inner wall of the top of the outer shell. An L-shaped socket and a positioning groove are arranged on the outer wall of the top. The clasp on the cup holder can be inserted into the vertical groove of the L-shaped slot and then screwed into the horizontal groove. A pin matching the pin groove is arranged at the top of the horizontal groove. The width of the positioning groove is greater than that of the positioning bump, and the positioning groove will not block the positioning bump when the clasp is screwed into the L-shaped slot.

[0007] When replacing the sampling cup, hold the outer shell and rotate the buckle out of the horizontal groove of the L-shaped slot, then slide down the combination of the inner container and the outer shell, and remove the inner container from the outer shell in the vertical direction. Then align the positioning anti-rotation rib of the new inner container with the positioning anti-rotation groove and insert it into the outer shell. Next, align the positioning groove of the outer shell with the positioning protrusion of the cup holder and install it on the cup holder. Rotate to make the buckle embed into the L-shaped socket to complete the installation.

[0008] The beneficial effects of the present utility model are as follows: It is quicker to remove and install the sampling cup, making it more convenient for operators to operate in the narrow space of the sampler, and also reducing the occurrence of accidental touches; and the outer shell can play a protective role to prevent the inner container from colliding with other components during operation and causing damage. Description of the Drawings

[0009] Figure 1 It is the explosion structure diagram of the present utility model.

[0010] Figure 2 It is the assembled structure diagram of the present utility model.

[0011] Figure 3 It is the schematic diagram of the cup holder structure.

[0012] Figure 4 It is the schematic diagram of the inner container structure.

[0013] Figure 5 It is the schematic diagram of the outer shell structure.

[0014] Wherein: 1 - cup holder, 11 - mounting hole, 12 - air inlet, 13 - air outlet pipe, 14 - buckle, 15 - positioning protrusion;

[0015] 2 - inner container, 21 - positioning anti-rotation rib;

[0016] 3 - outer shell, 31 - positioning anti-rotation groove, 32 - L-shaped slot, 33 - positioning groove, 34 - rubber pin. Detailed Implementation Manner

[0017] Embodiment 1: A sampling cup for a wet-wall cyclone sampler for bioaerosols, comprising a cup base 1, an inner liner 2 and an outer shell 3. The cup base 1 is a circular tubular structure, made entirely of PVC material. Four fixed mounting holes 11 are evenly arranged on the outer periphery of its top for fixing the cup base 1 at the mounting position of the sampler. An air inlet 12 is provided on the side wall of the cup base 1. A partition is arranged inside the cup base 1 to enclose it, and an air outlet pipe 13 is opened in the middle of the partition. The air outlet pipe 13 is connected to the aerodynamic device of the sampler. The partition is higher than the top surface of the air inlet 12, and the bottom surface of the air outlet pipe 13 is lower than the bottom surface of the air inlet 12. Three snap fasteners 14 and three positioning bumps 15 are evenly arranged at the bottom of the inner wall of the cup base 1. A pin groove is provided on the top surface of the snap fastener 14. The inner liner 2 is made entirely of PET material. The upper part is a circular tube, the outer diameter of which matches the inner diameter of the cup base 1, and a positioning anti-rotation rib 21 is provided at the bottom of its outer wall. A notch matching the position and size of the air inlet 12 on the cup base 1 is opened at the top of the side wall. The lower part of the inner liner is conical, and its height is not greater than the height of the outer shell. The outer shell 3 is made entirely of PET material. A positioning anti-rotation groove 31 matching the positioning anti-rotation rib 21 of the inner liner is provided on the inner wall of its top. An L-shaped slot 32 and a positioning groove 33 are provided on the outer wall of the top. The snap fastener 14 on the cup base 1 can be inserted into the vertical slot of the L-shaped slot 32 and then screwed into the horizontal slot. A rubber pin 34 matching the pin groove is provided at the top of the horizontal slot. The width of the positioning groove 33 is greater than that of the positioning bump 15. When the snap fastener 14 is screwed into the L-shaped slot 32, the positioning groove 33 will not block the positioning bump 15.

[0018] When installing the sampling cup, first insert the positioning anti-rotation rib 21 of the inner liner 2 into the positioning anti-rotation groove 31 of the outer shell 3, then align the positioning groove 33 of the outer shell 3 with the positioning bump 15 of the cup base 1 and install it on the cup base 1. Rotate it 15° to the right to make the snap fastener 14 embed into the L-shaped slot 32. After the snap fastener 14 presses against the pin 34, the pin 34 starts to deform. At this time, increase the force of twisting the sampling cup to make the pin 34 deform until the snap fastener 14 can pass through. After the snap fastener 14 is in place, the pin 34 rebounds into the pin groove of the snap fastener 14 for limiting, and the installation is completed. When removing the sampling cup, hold the outer shell 3 and forcefully pull the snap fastener 14 out of the pin 34, rotate it 15° to the left to rotate the snap fastener 14 out of the horizontal slot of the L-shaped slot 32, then slide out the combination of the inner liner 2 and the outer shell 3 downward, and take out the inner liner 2 from the outer shell 3 in the vertical direction to replace it with a new inner liner 2.

Claims

1. A sampling cup for a bioaerosol wetted wall cyclone sampler, characterized in that: The invention comprises a cup holder, an inner liner and an outer shell of a plastic deformation material. The cup holder is a circular tubular structure, and four fixing holes are evenly arranged on the outer circumference of the top thereof. An air inlet is opened on the side wall of the cup holder. A partition is arranged inside the cup holder to close it, and an air outlet pipe is opened in the middle of the partition. The air outlet pipe is connected to the aerodynamic device of the sampler. The partition is higher than the top surface of the air inlet, and the bottom surface of the air outlet pipe is lower than the bottom surface of the air inlet. Buckles and positioning protrusions are evenly arranged on the bottom of the inner wall of the cup holder, and a pin groove is arranged on the top surface of the buckle. The upper part of the inner liner is a circular tubular structure, and the outer diameter matches the inner diameter of the cup holder, and a There is a positioning and anti-rotation convex strip, and a notch matching the position and size of the air inlet on the cup holder is opened on the top of the side wall. The lower part of the inner liner is conical, and the height is not greater than the height of the outer shell; the inner wall at the top of the outer shell is provided with a positioning and anti-rotation groove matching the positioning and anti-rotation convex strip of the inner liner, and the top outer wall is provided with an L-shaped socket and a positioning groove. The buckle on the cup holder can be screwed into the horizontal groove after being inserted into the vertical groove of the L-shaped slot. A pin matching the pin groove is provided on the top of the horizontal groove. The width of the positioning groove is greater than the positioning protrusion, and the positioning groove will not block the positioning protrusion when the buckle is screwed into the L-shaped slot.

Images