A semi-automatic liquid-adding device for volumetric flasks

Abstract

The utility model relates to experimental instrument technical field, and disclose a kind of volumetric flask semi-automatic quantitative liquid adding device, including base, protective cover, mounting seat two and liquid storage tank, motor is fixedly installed in the protective cover inside, the output end of motor is fixedly installed with worm, the one end rotationally installed with transmission rod of protective cover away from base, the outer edge of transmission rod one end close to motor is fixedly installed with worm wheel.This volumetric flask semi-automatic quantitative liquid adding device, card hole three, card hole two and card hole one are annular distribution, cooperate the rotation of bottle clamping assembly, can sequentially transport each volumetric flask to the liquid adding of the lower pressing assembly below, improve liquid adding efficiency, cylinder output shaft force, drive limit plate along slide rail vertical lifting, drive liquid adding pipe connected with snap ring two synchronous movement, realize fast liquid adding, and snap ring one fixed connection pipe, snap ring two fixed liquid adding pipe end, the cooperation of both avoids displacement of liquid adding pipe in lifting process, convenient to replace liquid adding pipe of different diameter.

Description

Technical Field

[0001] This utility model relates to the field of experimental instrument technology, specifically to a semi-automatic quantitative liquid addition device for volumetric flasks. Background Technology

[0002] A volumetric flask is a precise instrument used to prepare solutions of a specific molar concentration. It is a pear-shaped, flat-bottomed glass bottle with a long, narrow neck and a ground glass stopper. The neck is marked with graduations, and the volume is the indicated volume when the volume inside the flask reaches the mark at a specified temperature.

[0003] In routine chemical analysis, volumetric flask volume dosing is a standard procedure. However, the operation of adding liquid to a volumetric flask by hand is cumbersome, especially in the case of continuous large-volume volume dosing. Due to operator fatigue or inattention, volume dosing often fails. Therefore, some volumetric flask volume dosing devices have appeared on the market.

[0004] Chinese Invention Patent Publication No. CN112432679A discloses a fully automatic volumetric flask. The specification of this fully automatic volumetric flask states that it can replace manual labor in transporting volumetric flasks to the volumetric flask volumetric flask filling device. After the volumetric flask has been filled, it can be removed and placed for the next one. This facilitates continuous, large-scale volumetric flask filling operations, improves volumetric flask filling efficiency, and saves time and labor, meeting the requirements of modern automated chemical analysis. However, while this fully automatic volumetric flask can achieve large-scale operations, it is not convenient to disassemble and rotate the flask clamping assembly. This not only easily leads to low filling efficiency but also makes it difficult to adapt to volumetric flasks of different diameters, resulting in poor versatility of the overall device during use. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a semi-automatic quantitative liquid dispensing device for volumetric flasks. It can effectively solve the problem in the prior art that although it can achieve large-scale operation, it is not convenient to disassemble and rotate the bottle clamping component, which not only easily leads to low liquid dispensing efficiency, but also makes it difficult to adapt to volumetric flasks of different diameters, resulting in poor versatility of the overall device during use.

[0006] The technical solution adopted by this utility model is: a semi-automatic quantitative liquid dispensing device for volumetric flasks, comprising a base, a protective cover, a second mounting base, and a liquid storage tank, characterized in that: a motor is fixedly installed inside the protective cover, a worm gear is fixedly installed at the output end of the motor, a transmission rod is rotatably installed at the end of the protective cover away from the base, a worm wheel is fixedly installed at the outer edge of the transmission rod near the motor, a first mounting base is fixedly installed at the end of the transmission rod away from the motor, a bottle clamping component is fixedly installed at the end of the first mounting base away from the motor, a connecting rod is fixedly installed at the end of the second mounting base away from the base, and a pressing component is provided at the end of the connecting rod away from the base; The bottle assembly includes a base and a connecting plate. A connecting column one is fixedly installed between the base and the connecting plate. A connecting column two is fixedly installed at the end of the connecting plate away from the base. A top plate is fixedly installed at the end of the connecting column two away from the base.

[0007] Preferably, a first locking hole is provided through the outer edge of the chassis, a second locking hole is provided through the outer edge of the connecting plate, and a third locking hole is provided through the outer edge of the top plate. Multiple identical locking holes are provided, and the multiple locking holes are distributed in a ring around the center line of the chassis.

[0008] Through the above technical solution, the volumetric flask passes through the three-hole, two-hole, and one-hole in sequence. The three-hole design restricts the shaking of the volumetric flask from the top, middle, and bottom, ensuring that the flask mouth is coaxial with the filling tube during liquid addition. Furthermore, the three-hole, two-hole, and one-hole are arranged in a ring shape. With the rotation of the flask clamping assembly, each volumetric flask can be sequentially transported to the area directly below the pressing assembly to complete the liquid addition, thereby improving the liquid addition efficiency.

[0009] Preferably, a through groove is provided at the inner edge of the chassis and the top plate, and a limit ring is fixedly installed at the end of the top plate away from the chassis.

[0010] Through the above technical solution, the inner diameter of the limiting ring is matched with the diameter of the bottle neck, which restricts the displacement of the bottle from the top. It works in conjunction with the bottom locking hole and the through groove to provide a space for the bottom of the bottle to be accommodated and observed.

[0011] Preferably, a mounting plate is fixedly installed at the end of the chassis away from the transmission rod, and the chassis is fixedly installed to the transmission rod through the mounting plate.

[0012] Through the above technical solution, the mounting plate is designed and fixed to the chassis and transmission rod with bolts, which helps to resist the gravity of multiple volumetric flasks and the centrifugal force during rotation, and avoids deformation of the connection parts. The mounting holes of the mounting plate are aligned with the central axis of the transmission rod and the chassis, so that the center of the bottle clamping assembly and the center of the pressing assembly are always aligned when the transmission rod rotates. Furthermore, the mounting plate is connected by detachable bolts, which makes it easy to replace bottle clamping assemblies of different specifications and adapt to different numbers or sizes of volumetric flasks, thus improving the versatility of the device.

[0013] Preferably, the worm and worm wheel are meshed, the bottle clamping assembly is located directly below the pressing assembly, and a maintenance plate is fixedly installed on the end of the protective cover away from the base.

[0014] Through the above technical solution, the worm gear and worm shaft work together to drive the transmission rod to slowly rotate the bottle clamping assembly, ensuring that the volumetric flask can be accurately positioned directly below the pressing assembly. The bottle clamping assembly is located directly below the pressing assembly, and the central axes of the two coincide. This allows the filling tube driven by the second clamping ring to be vertically inserted into the mouth of the volumetric flask during liquid addition, facilitating liquid addition.

[0015] Preferably, the pressing assembly includes a protective frame and a top plate. A liquid pump is provided on the outer edge of the protective frame. A cylinder and a slide rail are fixedly installed on the inner edge of the connecting rod. A limit plate is fixedly installed on the output end of the cylinder. A through groove is provided on the outer edge of the limit plate. A retaining ring is fixedly installed on the limit plate. A retaining ring is fixedly installed on the end of the top plate away from the cylinder.

[0016] Through the above technical solution, the cylinder outputs axial force to drive the limit plate to rise and fall vertically along the slide rail, which in turn drives the liquid filling pipe connected by the second retaining ring to move synchronously, thereby achieving rapid liquid filling. The first retaining ring fixes the connecting pipe, and the second retaining ring fixes the end of the liquid filling pipe. The two work together to prevent the liquid filling pipe from shifting during the rising and falling process, and at the same time, it is convenient to replace liquid filling pipes of different diameters.

[0017] Preferably, a liquid outlet is provided at the outer edge of the liquid storage tank, and a connecting pipe is provided at the end of the liquid outlet away from the liquid storage tank. The other end of the connecting pipe away from the liquid storage tank is adapted to a retaining ring.

[0018] The above technical solution, through the design of the liquid storage tank and the connection pipe, allows the liquid inside the storage tank to be injected into the volumetric flask, which can meet the needs of multiple batches of liquid addition and improve the overall processing efficiency.

[0019] Compared with the prior art, this utility model provides a semi-automatic quantitative liquid dispensing device for volumetric flasks, which has the following beneficial effects: 1. This semi-automatic quantitative liquid dispensing device for volumetric flasks involves the volumetric flasks passing sequentially through three, two, and one locking holes. These three layers of locking holes restrict the shaking of the volumetric flasks from the top, middle, and bottom, ensuring that the flask opening and the dispensing tube are coaxial during dispensing. Furthermore, the three locking holes are arranged in a ring, and with the rotation of the bottle clamping assembly, each volumetric flask can be sequentially transported to the area directly below the pressing assembly to complete the dispensing, thus improving dispensing efficiency. The cylinder outputs axial force to drive the limiting plate to move vertically up and down along the slide rail, causing the dispensing tube connected to the second locking ring to move synchronously, achieving rapid dispensing. The first locking ring fixes the connecting tube, and the second locking ring fixes the end of the dispensing tube. The two work together to prevent the dispensing tube from shifting during the lifting and lowering process, while also facilitating the replacement of dispensing tubes of different diameters. 2. This semi-automatic quantitative liquid dispensing device for volumetric flasks, through the design of the mounting plate, is fixed to the chassis and transmission rod respectively by bolts. This facilitates resistance to the gravity of multiple volumetric flasks and the centrifugal force during rotation, preventing deformation of the connection parts. The mounting holes of the mounting plate are aligned with the central axis of the transmission rod and the chassis, ensuring that the center of the bottle clamping component and the center of the pressing component are always aligned when the transmission rod rotates. Furthermore, the mounting plate is connected by detachable bolts, making it easy to replace bottle clamping components of different specifications to adapt to different numbers or sizes of volumetric flasks, thus improving the versatility of the device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the installation structure of the base and protective cover of this utility model; Figure 4 This is a schematic diagram showing the disassembled structure of the base and bottle assembly of this utility model; Figure 5 This is a three-dimensional structural diagram of the bottle-carrying assembly of this utility model; Figure 6 This is a schematic diagram of the disassembled structure of the pressing component of this utility model; Figure 7 This is a schematic diagram of the worm gear and worm shaft mounting structure of this utility model.

[0021] The components include: 1. Base; 2. Protective cover; 3. Inspection plate; 4. Motor; 5. Worm gear; 6. Transmission rod; 7. Worm wheel; 8. Mounting base one; 9. Mounting plate; 10. Bottle clamping assembly; 1001. Chassis; 1002. Clamping hole one; 1003. Connecting post one; 1004. Connecting plate; 1005. Clamping hole two; 1006. Connecting post two; 1007. Through groove one; 1008. Top plate; 100 9. Snap-hole three; 10. Limiting ring; 11. Mounting base two; 12. Connecting rod; 13. Pressing down assembly; 1301. Protective frame; 1302. Liquid pump; 1303. Cylinder; 1304. Slide rail; 1305. Limiting plate; 1306. Through groove two; 1307. Snap ring one; 1308. Top plate; 1309. Snap ring two; 14. Liquid storage tank; 15. Liquid outlet; 16. Connecting pipe. Detailed Implementation

[0022] 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.

[0023] Example 1: As Figure 1-7 As shown, the present invention provides a semi-automatic quantitative liquid dispensing device for volumetric flasks, including a base 1, a protective cover 2, a second mounting base 11, and a liquid storage tank 14. A motor 4 is fixedly installed inside the protective cover 2, and a worm gear 5 is fixedly installed at the output end of the motor 4. A transmission rod 6 is rotatably installed at the end of the protective cover 2 away from the base 1. A worm wheel 7 is fixedly installed at the outer edge of the transmission rod 6 near the motor 4. A first mounting base 8 is fixedly installed at the end of the transmission rod 6 away from the motor 4. A bottle clamping assembly 10 is fixedly installed at the end of the first mounting base 8 away from the motor 4. A connecting rod 12 is fixedly installed at the end of the second mounting base 11 away from the base 1. A pressing assembly 13 is provided at the end of the connecting rod 12 away from the base 1. The bottle-carrying assembly 10 includes a base 1001 and a connecting plate 1004. A connecting post 1003 is fixedly installed between the base 1001 and the connecting plate 1004. A connecting post 2 1006 is fixedly installed at the end of the connecting plate 1004 away from the base 1001. A top plate 1008 is fixedly installed at the end of the connecting post 2 1006 away from the base 1001.

[0024] Specifically, a locking hole 1002 is provided through the outer edge of the chassis 1001, a locking hole 1005 is provided through the outer edge of the connecting plate 1004, and a locking hole 1009 is provided through the outer edge of the top plate 1008. Multiple locking holes 1002, 1005, and 1009 are identical and arranged in a ring around the centerline of the chassis 1001. Advantages: Yes, the volumetric flask passes through the three-hole 1009, the two-hole 1005, and the one-hole 1002 in sequence. The three-layer hole restricts the shaking of the volumetric flask from the top, middle, and bottom, so that the flask mouth and the filling tube are coaxial during liquid addition. Furthermore, the three-hole 1009, the two-hole 1005, and the one-hole 1002 are arranged in a ring. With the rotation of the flask clamping assembly 10, each volumetric flask can be transferred to the bottom of the pressing assembly 13 in sequence to complete the liquid addition, which can improve the liquid addition efficiency.

[0025] Specifically, a through groove 1007 is provided on the inner edge of the base 1001 and the top plate 1008. A limiting ring 1010 is fixedly installed on the end of the top plate 1008 away from the base 1001. The advantage is that the inner diameter of the limiting ring 1010 is adapted to the diameter of the bottle neck, which restricts the displacement of the volumetric bottle from the top. It works in conjunction with the bottom locking hole 1002, and the through groove 1007 provides space for the bottom of the volumetric bottle to be accommodated and observed.

[0026] Specifically, a mounting plate 9 is fixedly installed at the end of the chassis 1001 away from the transmission rod 6. The chassis 1001 is fixedly installed to the transmission rod 6 through the mounting plate 9. The advantage is that, through the design of the mounting plate 9, it is fixed to the chassis 1001 and the transmission rod 6 respectively by bolts, which is convenient to resist the gravity of multiple volumetric bottles and the centrifugal force during rotation, and avoids deformation of the connection parts. The mounting holes of the mounting plate 9 are aligned with the central axis of the transmission rod 6 and the chassis 1001, so that when the transmission rod 6 rotates, the center of the bottle clamping assembly 10 is always aligned with the center of the pressing assembly 13. Furthermore, the mounting plate 9 is connected by detachable bolts, which is convenient to replace the bottle clamping assembly 10 of different specifications and adapt to different numbers or sizes of volumetric bottles, thus improving the versatility of the device.

[0027] Example 2: Figure 2-7 As shown, this is an improvement on the previous embodiment.

[0028] Specifically, the worm 5 and worm wheel 7 are meshed together, the bottle clamping assembly 10 is located directly below the pressing assembly 13, and the end of the protective cover 2 away from the base 1 is fixedly equipped with a maintenance plate 3. The advantage is that, through the cooperation of the worm 5 and worm wheel 7, the transmission rod 6 drives the bottle clamping assembly 10 to rotate slowly, ensuring that the volumetric flask can be accurately stopped directly below the pressing assembly 13. Furthermore, the bottle clamping assembly 10 is located directly below the pressing assembly 13, and the central axes of the two coincide, so that when adding liquid, the liquid adding tube driven by the retaining ring 2 1309 can be vertically inserted into the mouth of the volumetric flask, which facilitates liquid addition.

[0029] Specifically, the pressing assembly 13 includes a protective frame 1301 and a top plate 1308. A liquid pump 1302 is provided on the outer edge of the protective frame 1301. A cylinder 1303 and a slide rail 1304 are fixedly installed on the inner edge of the connecting rod 12. A limit plate 1305 is fixedly installed on the output end of the cylinder 1303. A through groove 1306 is provided on the outer edge of the limit plate 1305. A retaining ring 1307 is fixedly installed on the limit plate 1305. The top plate 1308 is located away from the cylinder 1301. One end of 303 is fixedly installed with a retaining ring 1309. The advantage is that the cylinder 1303 outputs axial force to drive the limit plate 1305 to move vertically up and down along the slide rail 1304, which drives the liquid filling pipe connected to the retaining ring 1309 to move synchronously, so as to realize rapid liquid filling. In addition, the retaining ring 1307 fixes the connecting pipe 16, and the retaining ring 1309 fixes the end of the liquid filling pipe. The two work together to prevent the liquid filling pipe from being displaced during the lifting and lowering process, and at the same time, it is convenient to replace the liquid filling pipe with different diameters.

[0030] Specifically, a liquid outlet 15 is provided at the outer edge of the liquid storage tank 14. A connecting pipe 16 is provided at the end of the liquid outlet 15 away from the liquid storage tank 14. The other end of the connecting pipe 16 away from the liquid storage tank 14 is adapted to the retaining ring 1307. The advantage is that, through the design of the liquid storage tank 14, it can be used with the connecting pipe 16 to allow the liquid inside the liquid storage tank 14 to be injected into the volumetric flask, which can meet the needs of multiple batches of liquid addition and improve the overall processing efficiency.

[0031] Working principle: During use, the volumetric flask passes through the three locking holes 1009, 1005, and 1002 in sequence. These three layers of locking holes restrict the flask's movement from the top, middle, and bottom, ensuring the flask neck is coaxial with the filling tube during dispensing. Furthermore, the locking holes 1009, 1005, and 1002 are arranged in a ring. Combined with the rotation of the flask clamping assembly 10, each volumetric flask can be sequentially transferred to the area directly below the pressing assembly 13 for dispensing, improving dispensing efficiency. The design of the limiting ring 1010 ensures that its inner diameter is directly aligned with the neck of the volumetric flask. The diameter is adapted to restrict the displacement of the volumetric flask from the top, and it works in conjunction with the bottom locking hole 1002. The through groove 1007 provides space for the bottom of the volumetric flask to accommodate and observe it. Through the design of the mounting plate 9, it is fixed to the chassis 1001 and the transmission rod 6 with bolts, which helps to resist the gravity of multiple volumetric flasks and the centrifugal force during rotation, preventing deformation of the connection parts. The mounting holes of the mounting plate 9 are aligned with the central axes of the transmission rod 6 and the chassis 1001, ensuring that the center of the flask locking assembly 10 and the center of the pressing assembly 13 are always aligned when the transmission rod 6 rotates. Plate 9 is connected by detachable bolts, facilitating the replacement of bottle clamping assemblies 10 of different specifications to accommodate different quantities or sizes of volumetric flasks, thus improving the versatility of the device. Through the cooperation of worm gear 5 and worm wheel 7, the transmission rod 6 drives the bottle clamping assembly 10 to rotate slowly, ensuring that the volumetric flask is precisely positioned directly below the pressing assembly 13. Furthermore, the bottle clamping assembly 10 is located directly below the pressing assembly 13, with their central axes coinciding. This allows the filling tube, driven by the retaining ring 1309, to be vertically inserted into the mouth of the volumetric flask during liquid addition, facilitating liquid addition. Cylinder 1303 outputs axial force. The drive limit plate 1305 moves vertically up and down along the slide rail 1304, causing the liquid filling tube connected to the second retaining ring 1309 to move synchronously, thus achieving rapid liquid filling. The first retaining ring 1307 fixes the connecting tube 16, and the second retaining ring 1309 fixes the end of the liquid filling tube. The two work together to prevent the liquid filling tube from shifting during the lifting and lowering process, and at the same time, it is easy to replace liquid filling tubes of different diameters. Through the design of the liquid storage tank 14, it can be connected with the connecting tube 16 to allow the liquid inside the liquid storage tank 14 to be injected into the volumetric flask, which can meet the needs of multiple batches of liquid filling and improve the overall processing efficiency.

[0032] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A semi-automatic quantitative liquid dispensing device for volumetric flasks, comprising a base (1), a protective cover (2), a mounting base (11), and a liquid storage tank (14), characterized in that: A motor (4) is fixedly installed inside the protective cover (2). A worm gear (5) is fixedly installed at the output end of the motor (4). A transmission rod (6) is rotatably installed at the end of the protective cover (2) away from the base (1). A worm wheel (7) is fixedly installed at the outer edge of the transmission rod (6) near the motor (4). A mounting base one (8) is fixedly installed at the end of the transmission rod (6) away from the motor (4). A bottle clamping assembly (10) is fixedly installed at the end of the mounting base one (8) away from the motor (4). A connecting rod (12) is fixedly installed at the end of the mounting base two (11) away from the base (1). A pressing assembly (13) is provided at the end of the connecting rod (12) away from the base (1). The bottle assembly (10) includes a chassis (1001) and a connecting plate (1004). A connecting post one (1003) is fixedly installed between the chassis (1001) and the connecting plate (1004). A connecting post two (1006) is fixedly installed at the end of the connecting plate (1004) away from the chassis (1001). A top plate (1008) is fixedly installed at the end of the connecting post two (1006) away from the chassis (1001).

2. The semi-automatic quantitative liquid dispensing device for volumetric flasks according to claim 1, characterized in that: A locking hole 1 (1002) is provided through the outer edge of the chassis (1001), a locking hole 2 (1005) is provided through the outer edge of the connecting plate (1004), and a locking hole 3 (1009) is provided through the outer edge of the top plate (1008). Multiple locking holes 1 (1002), 2 (1005) and 3 (1009) are provided, and the multiple locking holes 1 (1002), 2 (1005) and 3 (1009) are distributed in a ring about the center line of the chassis (1001).

3. The semi-automatic quantitative liquid dispensing device for volumetric flasks according to claim 1, characterized in that: A through groove (1007) is provided at the inner edge of the chassis (1001) and the top plate (1008), and a limit ring (1010) is fixedly installed at the end of the top plate (1008) away from the chassis (1001).

4. The semi-automatic quantitative liquid dispensing device for volumetric flasks according to claim 1, characterized in that: The chassis (1001) is fixedly mounted with a mounting plate (9) at the end away from the transmission rod (6), and the chassis (1001) is fixedly mounted to the transmission rod (6) through the mounting plate (9).

5. The semi-automatic quantitative liquid dispensing device for volumetric flasks according to claim 1, characterized in that: The worm (5) and worm wheel (7) are meshed together. The bottle clamping assembly (10) is located directly below the pressing assembly (13). The end of the protective cover (2) away from the base (1) is fixedly equipped with a maintenance plate (3).

6. The semi-automatic quantitative liquid dispensing device for volumetric flasks according to claim 1, characterized in that: The pressing assembly (13) includes a protective frame (1301) and a top plate (1308). A liquid pump (1302) is provided on the outer edge of the protective frame (1301). A cylinder (1303) and a slide rail (1304) are fixedly installed on the inner edge of the connecting rod (12). A limit plate (1305) is fixedly installed on the output end of the cylinder (1303). A through groove (1306) is provided on the outer edge of the limit plate (1305). A retaining ring (1307) is fixedly installed on the limit plate (1305). A retaining ring (1309) is fixedly installed on the end of the top plate (1308) away from the cylinder (1303).

7. A semi-automatic quantitative liquid dispensing device for volumetric flasks according to claim 6, characterized in that: The liquid storage tank (14) has an outlet (15) at its outer edge. A connecting pipe (16) is provided at one end of the outlet (15) away from the liquid storage tank (14). The other end of the connecting pipe (16) away from the liquid storage tank (14) is adapted to the retaining ring (1307).

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