A medium dispensing apparatus

Abstract

The utility model discloses a culture medium divides and packs equipment relates to culture medium divides and packs field, including fixed bolster, the inner wall fixed mounting of fixed bolster has the sleeve, the inner wall sliding connection of sleeve has the piston that penetrates to sleeve top, the bottom one side of sleeve is connected with input pipe, the bottom other side of sleeve is connected with output pipe, the inside installation of input pipe with output pipe has one -way mechanism, the top board one side protruding ear of fixed bolster rotates and is installed with screw rod no.

Description

Technical Field

[0001] This utility model relates to the field of culture medium dispensing, specifically a culture medium dispensing device. Background Technology

[0002] Dispensing culture media is a condition to ensure that the culture medium is in equal volume for microbial culture. In existing technologies, there are several methods for dispensing culture media. One method involves weighing the media in graduated test tubes and then pouring it into petri dishes. This method is inefficient. Utility Model Content

[0003] The purpose of this invention is to provide a culture medium dispensing device in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a culture medium dispensing device, including a fixed support, a sleeve fixedly installed on the inner wall of the fixed support, a piston slidably connected to the inner wall of the sleeve extending to the top of the sleeve, an input pipe connected to one side of the bottom end of the sleeve, an output pipe connected to the other side of the bottom end of the sleeve, a one-way mechanism installed inside the input pipe and the output pipe, a first screw rotatably installed on a protruding lug on one side of the top plate of the fixed support, a second screw rotatably installed on a protruding lug on the other side of the top end of the fixed support, an mounting plate rotatably installed on the top of the first screw and the second screw, a movable plate threadedly connected to one end of the outer wall of the first screw, the other end of the movable plate slidably fitted onto the outer wall of the second screw; a limiting mechanism is installed inside the movable plate, two movable blocks are symmetrically formed on the outer periphery of the piston, one movable block is slidably connected to the first screw, and the other movable block is threadedly connected to the second screw.

[0005] As a further embodiment of this utility model: an upwardly protruding marker is fixedly installed on the top of the movable plate, the marker extends through the mounting plate and upwards, height scales are engraved on both sides of the marker, and a sliding groove is provided inside the mounting plate for the marker to slide up and down.

[0006] As a further embodiment of this utility model: the limiting mechanism includes a receiving groove that is recessed upward at the bottom end of the moving plate, a pressure head that is slidably installed on the inner wall of the receiving groove, the bottom end of the pressure head extending through to the bottom of the moving plate, two guide rods that are symmetrically fixedly installed on the inner wall of the moving plate, the guide rods being slidably connected to the pressure head, and a spring that is fixedly connected between the top end of the pressure head and the bottom end of the inner wall of the receiving groove, the spring being sleeved on the outer periphery of the guide rod.

[0007] As a further improvement of this utility model: a pressure sensor is fixedly installed on the top of the inner wall of the movable plate, and an upwardly protruding top rod is integrally formed on the top of the pressure-receiving head.

[0008] As a further embodiment of this utility model: the one-way mechanism includes a first fixing ring fixedly installed on the inner wall of the output port of the input tube, and a first one-way valve diaphragm connected above the first fixing ring to the inner wall of the output port of the input tube. A portion of one end of the outer periphery of the first one-way valve diaphragm is fixedly connected to the inner wall of the input tube, while the other parts of the outer periphery of the first one-way valve diaphragm are in contact with but not connected to the inner wall of the input tube. The one-way mechanism further includes a second fixing ring fixedly installed on the inner wall of the input port of the output tube. A second one-way valve diaphragm is connected to the inner wall of the input port of the output tube below the second fixing ring. A portion of one end of the outer periphery of the second one-way valve diaphragm is fixedly connected to the inner wall of the output tube, while the other parts of the outer periphery of the second one-way valve diaphragm are in contact with but not connected to the inner wall of the output tube.

[0009] As a further improvement of this utility model: a handle is fixedly installed on the top of the first screw, and the top of the second screw is coaxially and fixedly connected to the output shaft of the forward and reverse motor.

[0010] Compared with the prior art, the beneficial effects of this utility model are: By setting an adjustment mechanism, automated quantitative dispensing can be achieved. By driving the piston to move back and forth, the purpose of quickly dispensing culture medium can be realized. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 For the present utility model Figure 2 Enlarged view of a portion of point A in the middle; Figure 4 For the present utility model Figure 2 Enlarged view of section B in the middle.

[0012] In the diagram: 1. Fixed bracket; 2. Sleeve; 3. Piston; 4. Screw No. 1; 5. Screw No. 2; 6. Moving plate; 7. Mounting plate; 8. Moving block; 9. Handle; 10. Forward and reverse motor; 11. Marking ruler; 12. Input pipe; 13. Output pipe; 14. Slide groove; 15. Receiving groove; 16. Guide rod; 17. Spring; 18. Pressure head; 19. Top rod; 20. Pressure sensor; 21. Fixed ring No. 1; 22. One-way valve diaphragm No. 1; 23. Fixed ring No. 2; 24. One-way valve diaphragm No. 2. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figures 1-4 In this embodiment of the invention, a culture medium dispensing device includes a fixed support 1. A sleeve 2 is fixedly installed on the inner wall of the fixed support 1. A piston 3, extending through the upper part of the sleeve 2, is slidably connected to the inner wall of the sleeve 2. An input pipe 12 is connected to one side of the bottom end of the sleeve 2, and an output pipe 13 is connected to the other side of the bottom end of the sleeve 2. A one-way mechanism is installed inside the input pipe 12 and the output pipe 13. A first screw 4 is rotatably installed on a protruding ear on one side of the top plate of the fixed support 1, and a second screw 5 is rotatably installed on a protruding ear on the other side of the top end of the fixed support 1. An mounting plate 7 is rotatably installed on the top of the first screw 4 and the second screw 5. One end of the movable plate 6 is threadedly connected to the outer wall, and the other end of the movable plate 6 is slidably fitted onto the outer wall of the second screw 5. A limit mechanism is installed inside the movable plate 6. Two movable blocks 8 are symmetrically formed on the outer periphery of the piston 3. One movable block 8 is slidably connected to the first screw 4, and the other movable block 8 is threadedly connected to the second screw 5. An upwardly protruding marking ruler 11 is fixedly installed at the top of the movable plate 6. The marking ruler 11 passes through the mounting plate 7 and extends upward. Height scales are engraved on both sides of the marking ruler 11. A groove 14 for the marking ruler 11 to slide up and down is opened inside the mounting plate 7. A handle 9 is fixedly installed at the top of the first screw 4.

[0015] In this embodiment: First, handle 9 is rotated according to the volume of the culture medium. Handle 9 drives screw 4 to rotate, which in turn drives moving plate 6 to move up or down. Moving plate 6 moves vertically and simultaneously drives ruler 11 to move upward. The top of ruler 11 is the 0 mark. When moving plate 6 is at its lowest position, the 0 mark is aligned with the top surface of mounting plate 7. After the height mark on ruler 11 has moved completely, the height value aligned with the top surface of mounting plate 7 is observed to determine whether the target height has been reached. Adjust the volume (volume = inner wall cross-sectional area of ​​sleeve 2 * height). Once the desired volume is reached, drive the second screw 5 to rotate. The second screw 5 drives the threaded moving block 8 to move upward. The moving moving block 8 drives the piston 3 to move upward. At this time, another moving block 8 slides upward on the outer wall of the first screw 4 until the top of the piston 3 contacts the limiting mechanism and triggers the limiting mechanism. At this time, the limiting mechanism sends an electrical signal to the controller, and the controller controls the second screw 5 to rotate in the opposite direction, so as to achieve the purpose of moving the piston 3 downward.

[0016] During the above process, piston 3 moves upward to create negative pressure, and the culture medium enters the sleeve 2 through input pipe 12. When piston 3 moves downward to create positive pressure, the culture medium is discharged outward through output pipe 13. In this process, the one-way mechanism realizes that the culture medium enters the sleeve 2 in one direction through input pipe 12 and is discharged outward in one direction through output pipe 13.

[0017] It should be noted that since the lowest position of piston 3 and moving block 8 is fixed, a limit switch can be installed at the bottom of moving block 8. This allows the switch to send another electrical signal to the controller when piston 3 moves to the lowest position. The controller can then control the piston 3 to move upward again.

[0018] Please refer to this carefully. Figure 2 and Figure 3 The limiting mechanism includes a receiving groove 15 recessed upward at the bottom of the moving plate 6. A pressure head 18 is slidably installed on the inner wall of the receiving groove 15. The bottom end of the pressure head 18 extends through to the bottom of the moving plate 6. Two guide rods 16 are symmetrically fixedly installed on the inner wall of the moving plate 6. The guide rods 16 are slidably connected to the pressure head 18. A spring 17 is fixedly connected between the top end of the pressure head 18 and the bottom end of the inner wall of the receiving groove 15. The spring 17 is sleeved on the outer periphery of the guide rod 16. A pressure sensor 20 is fixedly installed on the top end of the inner wall of the moving plate 6. A top rod 19 protruding upward is integrally formed on the top end of the pressure head 18. The top end of the second screw 5 is coaxially fixedly connected to the output shaft of the forward and reverse motor 10.

[0019] In this embodiment: the forward and reverse motor 10 is controlled by a switch to rotate forward. When the piston 3 moves upward, the piston 3 gradually approaches the pressure head 18 and comes into contact with the pressure head 18. The pressure head 18, which is being squeezed, moves upward to squeeze the spring 17 and moves upward along the guide rod 16 until the bottom plane of the pressure head 18 is aligned with the bottom plane of the moving plate 6. At this time, the pressure sensor 20 is subjected to the squeezing force of the top rod 19. At this time, the pressure sensor 20 sends an electrical signal to the controller, and the controller controls the forward and reverse motor 10 to rotate, so that the piston 3 moves downward and achieves the purpose of quantitative filling of the culture medium.

[0020] Please refer to this carefully. Figure 4 The one-way mechanism includes a first fixing ring 21 fixedly installed on the inner wall of the output port of the input pipe 12. A first one-way valve diaphragm 22 is connected above the first fixing ring 21 to the inner wall of the output port of the input pipe 12. A portion of the outer periphery of the first one-way valve diaphragm 22 is fixedly connected to the inner wall of the input pipe 12, while the other portion of the outer periphery of the first one-way valve diaphragm 22 is in contact with but not connected to the inner wall of the input pipe 12. The one-way mechanism also includes a second fixing ring 23 fixedly installed on the inner wall of the input port of the output pipe 13. A second one-way valve diaphragm 24 is connected below the second fixing ring 23 to the inner wall of the input port of the output pipe 13. A portion of the outer periphery of the second one-way valve diaphragm 24 is fixedly connected to the inner wall of the output pipe 13, while the other portion of the outer periphery of the second one-way valve diaphragm 24 is in contact with but not connected to the inner wall of the output pipe 13.

[0021] In this embodiment: During the upward movement of piston 3, a negative pressure is formed. Under the negative pressure, the first one-way valve membrane 22 opens upward. At this time, the culture medium enters the sleeve 2 through the input pipe 12. At this time, the second one-way valve membrane 24 is closed under the limit of the second fixing ring 23. When piston 3 moves downward, the resulting squeezing force causes the first one-way valve membrane 22 to close and the second one-way valve membrane 24 to open, so that the culture medium can be discharged outward through the output pipe 13.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A medium dispensing apparatus comprising a stationary support (1), characterized in that, A sleeve (2) is fixedly installed on the inner wall of the fixed bracket (1). A piston (3) is slidably connected to the inner wall of the sleeve (2) and extends to the top of the sleeve (2). An input pipe (12) is connected to one side of the bottom end of the sleeve (2), and an output pipe (13) is connected to the other side of the bottom end of the sleeve (2). A one-way mechanism is installed inside the input pipe (12) and the output pipe (13). A screw (4) is rotatably installed on a protruding ear on one side of the top plate of the fixed bracket (1), and a screw (4) is rotatably installed on a protruding ear on the other side of the top end of the fixed bracket (1). The second screw (5) has an mounting plate (7) rotatably installed on the top of the first screw (4) and the second screw (5). The outer wall of the first screw (4) is threadedly connected to one end of a moving plate (6), and the other end of the moving plate (6) is slidably fitted onto the outer wall of the second screw (5). The moving plate (6) has a limit mechanism installed inside. The piston (3) has two symmetrically formed moving blocks (8) on its outer periphery. One moving block (8) is slidably connected to the first screw (4) up and down, and the other moving block (8) is threadedly connected to the second screw (5).

2. The media dispensing apparatus of claim 1, wherein, The top of the movable plate (6) is fixedly installed with an upward protruding marker (11). The marker (11) passes through the mounting plate (7) and extends upward. Both sides of the marker (11) are engraved with height scales. The mounting plate (7) has a sliding groove (14) inside for the marker (11) to slide up and down.

3. A media dispensing apparatus as claimed in claim 2, wherein, The limiting mechanism includes a receiving groove (15) recessed upward at the bottom of the moving plate (6). A pressure head (18) is slidably installed on the inner wall of the receiving groove (15). The bottom end of the pressure head (18) extends through to the bottom of the moving plate (6). Two guide rods (16) are symmetrically fixedly installed on the inner wall of the moving plate (6). The guide rods (16) are slidably connected to the pressure head (18) in a vertical manner. A spring (17) is fixedly connected between the top end of the pressure head (18) and the bottom end of the inner wall of the receiving groove (15). The spring (17) is sleeved on the outer periphery of the guide rod (16).

4. The media dispensing apparatus of claim 3, wherein, A pressure sensor (20) is fixedly installed on the top of the inner wall of the movable plate (6), and an upward protruding top rod (19) is integrally formed on the top of the pressure head (18).

5. A media dispensing apparatus as claimed in claim 4, wherein, The one-way mechanism includes a first fixing ring (21) fixedly installed on the inner wall of the output port of the input tube (12). A first one-way valve diaphragm (22) is connected above the first fixing ring (21) on the inner wall of the output port of the input tube (12). A portion of one end of the outer periphery of the first one-way valve diaphragm (22) is fixedly connected to the inner wall of the input tube (12), while the other parts of the outer periphery of the first one-way valve diaphragm (22) are in contact with but not connected to the inner wall of the input tube (12). The one-way mechanism also includes a second fixing ring (23) fixedly installed on the inner wall of the input port of the output tube (13). The inner wall of the input port of the output tube (13) is connected to a second one-way valve diaphragm (24) below the second fixing ring (23). A portion of one end of the outer periphery of the second one-way valve diaphragm (24) is fixedly connected to the inner wall of the output tube (13), while the other parts of the outer periphery of the second one-way valve diaphragm (24) are in contact with but not connected to the inner wall of the output tube (13).

6. The media dispensing apparatus of claim 1, wherein, A handle (9) is fixedly installed on the top of the first screw (4), and the top of the second screw (5) is coaxially fixedly connected to the output shaft of the forward and reverse motor (10).

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