A non-destructive plug-pulling device for laboratory glass containers

Abstract

The present invention discloses a non-destructive plug-pulling device for laboratory glass containers, which comprises a housing. A through groove is formed in the middle of the housing. A plurality of clamping blocks for clamping volumetric flasks are arranged at the lower end inside the through groove. The clamping blocks are driven by a rotating frame provided on the lower end face of the housing. Two observation grooves and two rising grooves are symmetrically formed on the upper groove wall of the through groove respectively. A first clamping plate and a second clamping plate are respectively slidably connected inside the two rising grooves. First clamping frames and second clamping frames for clamping bottle stoppers are fixedly connected to the inner end faces of the first clamping plate and the second clamping plate respectively. The first clamping plate and the second clamping plate are both slidably connected with sliders through sliding grooves formed thereon. The sliders are meshed with a screw rod, and the screw rod is driven by a rotating rod provided on the outer side wall of the upper end of the housing. This application avoids the problem that it is difficult to apply force manually when pulling the plug, and at the same time, it will not contaminate the solution in the volumetric flask.

Description

Technical Field

[0001] The present invention relates to the technical field of experimental supplies, and particularly to a non-destructive plug-pulling device for laboratory glass containers. Background Art

[0002] A volumetric flask is a volumetric vessel with a narrow neck, pear-shaped bottom, and a ground glass stopper, with a marking line on the neck. A volumetric flask is a precise instrument for preparing a solution with an accurate specified molar concentration. Generally, it is made of glass and is a common experimental apparatus in laboratories such as chemistry and biology.

[0003] However, sometimes due to the weak alkalinity of the solution inside the volumetric flask or long-term storage after preparation, the stopper is difficult to pull out. This situation is often encountered by laboratory staff and causes headaches.

[0004] Currently, manual plug-pulling is generally used. However, due to the shape of the stopper and the volumetric flask, it is difficult to apply force during manual plug-pulling, and the effect is very poor. Moreover, since it is made of glass, it is not convenient to apply excessive vibration or knocking. If the solution in the volumetric flask has a low value, in order to preserve the volumetric flask, it can be immersed in hot water for a period of time and then the stopper can be pulled out. However, this method is likely to contaminate the solution inside the volumetric flask. Additionally, if the solution has a high value, such as some drug intermediate standards, the volumetric flask may be damaged to take out the solution, but there is still a risk of glass fragmentation and contamination. To solve the above problems, the present invention provides a non-destructive plug-pulling device for laboratory glass containers. Summary of the Invention

[0005] The purpose of the present invention is to provide a non-destructive plug-pulling device for laboratory glass containers to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A non-destructive plug-pulling device for laboratory glass containers, including a housing. A through groove is opened in the middle of the housing. Multiple clamping blocks for clamping a volumetric flask are provided at the lower end inside the through groove. The clamping blocks are driven by a rotating frame provided on the lower end surface of the housing. Two observation grooves and two rising grooves are symmetrically opened on the upper groove wall of the through groove respectively. A first clamping plate and a second clamping plate are slidably connected inside the two rising grooves respectively. First clamping frames and second clamping frames for clamping the bottle stopper are fixedly connected to the inner end surfaces of the first clamping plate and the second clamping plate respectively. The first clamping plate and the second clamping plate are both slidably connected with sliders through sliding grooves opened thereon. The sliders are meshed with a screw rod, and the screw rod is driven by a rotating rod provided on the outer side wall of the upper end of the housing.

[0007] Preferably, a ejector rod is fixedly connected to the outer side wall of the clamping block. The outer end of the ejector rod penetrates through the groove wall of the through groove and extends into an empty groove formed inside the housing, and is movably connected to an inclined groove formed on the inner side surface of the rotating ring. The rotating ring is rotatably connected inside the empty groove, and the lower groove wall of the empty groove is meshed with the rotating frame. The rotating frame is slidably connected to the rotating ring through a fixing rod fixedly connected to its upper end.

[0008] Preferably, a round plate is fixedly sleeved on the side wall of one end of the ejector rod located inside the empty groove, and a spring is connected between the round plate and the groove wall of the empty groove.

[0009] Preferably, a heating block for heating the bottle body of the volumetric flask is arranged inside the clamping block, and the heating block is electrically connected to an external power supply through a conductive rod fixedly connected to its outer side wall.

[0010] Preferably, the upper end of the screw rod extends into an annular groove formed on the outer side wall of the upper end of the housing and is fixedly connected to a gear, and the gear is meshed with a toothed ring rotatably connected inside the annular groove. A rotating rod is fixedly connected to the outer side wall of the toothed ring.

[0011] Preferably, the slider is in the shape of a "work" character, and a plurality of protrusions are fixedly connected to the inner side wall of its lower end. A plurality of clamping grooves corresponding to the protrusions are formed on the lower side walls of the first clamping plate and the second clamping plate and on both sides of the sliding groove.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the cooperation between the rotating frame and the clamping block, the present invention realizes that rotating the rotating frame can make a plurality of clamping blocks move towards the middle of the through groove at the same time, so as to clamp the bottleneck of the volumetric flask. Through the cooperation between the first clamping frame and the second clamping frame, it is realized that the upper part of the bottle stopper can be clamped by pushing the first clamping plate and the second clamping plate, and then the rotating rod can be rotated to make the first clamping plate and the second clamping plate drive the first clamping frame and the second clamping frame to rise respectively, so as to achieve the purpose of unplugging the stopper. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 is a cross-sectional view of the present invention;

[0015] Figure 3 is an exploded view of the toothed ring and the annular groove of the present invention;

[0016] Figure 4 is an exploded view of the first clamping frame and the second clamping frame of the present invention;

[0017] Figure 5 is a connection schematic diagram of the first clamping frame and the second clamping frame of the present invention;

[0018] Figure 6 Schematic diagram of the lower side structure of the first clamping plate and the second clamping plate of the present invention;

[0019] Figure 7 Schematic diagram of the internal structure of the hidden groove of the present invention;

[0020] Figure 8 Schematic diagram of the connection between the inclined groove and the ejector rod of the present invention;

[0021] Figure 9 Exploded view of the rotating frame and the rotating ring of the present invention;

[0022] Figure 10 Schematic diagram of the use state of the first clamping frame and the second clamping frame of the present invention;

[0023] Figure 11 For the present invention Figure 2 Enlarged view of part A.

[0024] In the figure: 1, outer shell; 2, through groove; 3, clamping block; 4, rotating frame; 5, observation groove; 6, rising groove; 7, first clamping plate; 8, second clamping plate; 9, first clamping frame; 10, second clamping frame; 11, sliding groove; 12, sliding block; 13, screw rod; 14, rotating rod; 15, ejector rod; 16, empty groove; 17, rotating ring; 18, inclined groove; 19, fixed rod; 20, circular plate; 21, spring; 22, heating block; 23, conductive rod; 24, ring groove; 25, gear; 26, toothed ring; 27, protrusion; 28, clamping groove; 29, conductive ring; 30, communication groove; 31, through hole; 32, hidden groove; 33, relief groove; 34, plug handle; 35, bottle plug. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1-11The present invention provides a technical solution: a non-destructive laboratory glass container plugging device, comprising a shell 1, a through groove 2 is opened in the middle of the shell 1, the bottleneck of the volumetric flask can be inserted into the through groove 2, and a plurality of clamping blocks 3 for clamping the volumetric flask are arranged at the lower end of the through groove 2. The inner side surface of the clamping block 3 is an arc surface, which can well clamp the bottleneck of the volumetric flask. The inside of the clamping block 3 is a hard material, and the outside of the clamping block 3 is coated with a layer of soft rubber. While the clamping block 3 stably clamps the volumetric flask, it can avoid damaging the volumetric flask. The clamping block 3 is driven by a rotating frame 4 provided on the lower end surface of the shell 1. Rotating the rotating frame 4 can make a plurality of clamping blocks 3 move toward the middle of the through groove 2 at the same time, so that the clamping block 3 clamps the volumetric flask tightly. The upper end of the through groove 2 Two observation grooves 5 and two rising grooves 6 are symmetrically opened on the groove wall, and the two observation grooves 5 and the two rising grooves 6 are cross-distributed on the groove wall of the through groove 2 in sequence. The insides of the two rising grooves 6 are slidably connected with the first clamping plate 7 and the second clamping plate 8, respectively. The inner end surfaces of the first clamping plate 7 and the second clamping plate 8 are respectively fixedly connected with the first clamping frame 9 and the second clamping frame 10 for clamping the bottle stopper 35. The first clamping frame 9 and the second clamping frame 10 are both "U"-shaped. The thickness of the vertical rod of the first clamping frame 9 is greater than the thickness of the vertical rod of the second clamping frame 10. The thickness of the closed end of the first clamping frame 9 is equal to the thickness of the closed end of the second clamping frame 10. The two vertical rods of the second clamping frame 10 can be inserted into the connecting grooves 30 opened in the two vertical rods on the first clamping frame 9 (such as Figure 5 As shown in the figure, one side wall and one end wall of the connecting groove 30 are both connected to the outside. When the second clamping frame 10 is inserted into the first clamping frame 9, the cross bar on the second clamping frame 10 and the cross bar on the first clamping frame 9 can cooperate with each other to clamp the upper half of the bottle stopper 35. The second clamping plate 8 is provided with a clearance groove 33, which can smoothly allow the first clamping frame 9 to move onto the second clamping plate 8 (as shown in the figure). Figure 5 As shown), the first clamping plate 7 and the second clamping plate 8 are both slidably connected with a slider 12 through a slide groove 11 opened thereon, and the slider 12 is meshed with a screw 13, and the screw 13 is driven by a rotating rod 14 provided on the outer wall of the upper end of the shell 1. When the rotating rod 14 rotates around the shell 1, the screw 13 can be rotated. The rotation of the screw 13 can make the corresponding slider 12 drive the first clamping plate 7 and the second clamping plate 8 to rise at the same time.

[0027] Specifically, a push rod 15 is fixedly connected to the outer wall of the clamp block 3, and the outer end of the push rod 15 passes through the groove wall of the through groove 2 and extends to the empty groove 16 opened inside the shell 1, and is movably connected to the inclined groove 18 opened on the inner side of the rotating ring 17. The rotating ring 17 is rotatably connected in the empty groove 16. The number of the inclined grooves 18 is the same as the number of the clamp block 3. Figure 8Rotating the rotating ring 17 clockwise as shown can cause the groove wall of the inclined groove 18 to squeeze the ejector rod 15, so that the ejector rod 15 drives the clamping block 3 to move towards the middle of the through groove 2, thereby clamping the neck of the volumetric flask by the clamping block 3. The rotating ring 17 is rotatably connected inside the empty groove 16, and the lower groove wall of the empty groove 16 is meshed with the rotating frame 4. As Figure 3 shown, a through circular groove is formed in the lower groove wall of the empty groove 16, and internal threads are formed on the inner side wall of the rotating frame 4, which are meshed with the groove wall of the circular groove on the lower groove wall of the empty groove 16. The rotating frame 4 is slidably connected to the rotating ring 17 through a fixing rod 19 fixedly connected to its upper end. The upper end of the fixing rod 19 extends into a through hole 31 formed in the rotating ring 17. At this time, when the rotating frame 4 rotates, it will drive the rotating ring 17 to rotate through the fixing rod 19 (when the rotating frame 4 rises, the fixing rod 19 will only rise inside the through hole 31 and will not contact and drive the rotating ring 17 to rise).

[0028] Since the rotating frame 4 is meshed with the circular groove, after the rotating frame 4 rotates to any angle, its angle will remain unchanged without external force, so that the rotating ring 17 will not rotate randomly after rotating to any angle, so that the inclined groove 18 can stably drive the clamping block 3 to move inward to clamp the volumetric flask body.

[0029] In order to better remove the device from the volumetric flask after use, a spring 21 is provided. Specifically, a circular plate 20 is fixedly sleeved on the side wall of one end of the ejector rod 15 located inside the empty groove 16, and a spring 21 is connected between the circular plate 20 and the groove wall of the empty groove 16. One end of the spring 21 is fixedly connected to the circular plate 20, and the other end is fixedly connected to the groove wall of the empty groove 16. The spring 21 can give a certain elastic force to the ejector rod 15 to make it move towards the inside of the empty groove 16. When the inclined groove 18 no longer squeezes the ejector rod 15, the ejector rod 15 will drive the clamping block 3 to move away from the center position of the through groove 2 under the elastic force of the spring 21, so that the device can be well removed from the volumetric flask after use.

[0030] In order to make it easier to pull out the bottle stopper 35, a heating block 22 is provided to heat the bottleneck. Specifically, the clamp 3 is provided with a heating block 22 for heating the bottle body of the volumetric bottle, and the heating block 22 is electrically connected to an external power source through a conductive rod 23 fixedly connected to the outer wall thereof. The heating block 22 can heat the bottleneck of the volumetric bottle, causing slight thermal expansion and contraction of the bottleneck, thereby making it easier to pull out the bottle stopper 35. Each heating block 22 is connected to two conductive rods 23, and the two conductive rods 23 penetrate The groove wall of the through groove 2 extends to the dark groove 32 opened inside the shell 1, and is movably connected to the two conductive rings 29 inside the dark groove 32, respectively. The two conductive rings 29 are respectively connected to the positive and negative poles of the external power supply. When the conductive rod 23 follows the movement of the heating block 22 (clamping block 3), it will form a brush with the conductive ring 29, so that the heating block 22 can keep the circuit smooth. The heating block 22 is a prior art, and its structure and working principle are not the technical features of the present invention, so it will not be repeated. For example, the electric heater that is now widely used,

[0031] Specifically, the heating block 22 is made of metal and has a heating wire inside which generates heat when powered on. The heating block 22 is wrapped with soft rubber. The metal heating block 22 has a certain strength that allows the outer rubber to fit tightly against the bottleneck of the volumetric flask. The metal heating block 22 can quickly transfer heat to the bottleneck of the volumetric flask through the rubber film covering it, and has a dual function.

[0032] Specifically, the upper end of the screw 13 extends to the inside of the annular groove 24 opened on the outer wall of the upper end of the shell 1 and is fixedly connected to a gear 25, and the gear 25 is rotatably connected to the inside of the annular groove 24 and is meshed with a gear ring 26. A plurality of teeth are provided on the inner wall of the gear ring 26. By rotating the gear ring 26, the two gears 25 can be rotated synchronously, thereby rotating the two screws 13. Two rotating rods 14 are symmetrically connected to the outer wall of the gear ring 26. The gear ring 26 can be rotated by rotating the rotating rods 14.

[0033] In order to make the first clamping plate 7 and the second clamping plate 8 rise more stably, a protrusion 27 is provided on the slider 12. Specifically, the slider 12 is in the shape of an "I" character, and a plurality of protrusions 27 are fixedly connected to the inner side wall of its lower end. A plurality of grooves 28 corresponding to the protrusions 27 are provided on the lower side walls of the first clamping plate 7 and the second clamping plate 8 and on both sides of the slide groove 11. When the screw 13 is rotated, the slider 12 will drive the first clamping plate 7 and the second clamping plate 8 to rise. At this time, the lower side wall of the slider 12 will apply a certain pressure to the first clamping plate 7 and the second clamping plate 8, so that the protrusion 27 and the groove 28 can be tightly clamped together, so that the first clamping plate 7 and the second clamping plate 8 will not slide randomly when rising.

[0034] Attached Figure 10The three types of stopper 35 forms within are the stopper 35 forms of the vast majority of volumetric flasks currently on the market.

[0035] Working principle: When in use, the outer shell 1 is sleeved on the bottleneck of the volumetric flask. The positions of the first clamping frame 9 and the second clamping frame 10 are determined by observing the groove 5, so that the first clamping frame 9 and the second clamping frame 10 are located below the handle 34 of the stopper. Then, while holding the outer shell 1, rotate the rotating frame 4 clockwise to make the clamping block 3 clamp the bottleneck of the volumetric flask (at this time, the heating block 22 inside the clamping block 3 is powered on to heat the bottleneck). Then, simultaneously push the first clamping plate 7 and the second clamping plate 8 towards the middle of the through groove 2, so that the first clamping frame 9 and the second clamping frame 10 clamp the handle 34. Then, the rotating rod 14 can be rotated clockwise, so that the toothed ring 26 drives the gear 25 to rotate clockwise, thereby making the screw 13 also rotate clockwise, and then the first clamping plate 7 and the second clamping plate 8 respectively drive the first clamping frame 9 and the second clamping frame 10 to rise, and the upward pulling force is increased through the transmission between the teeth and the meshing of the screw 13 to achieve stopper removal; after the stopper is removed, rotate the rotating frame 4 counterclockwise so that the clamping block 3 no longer clamps the bottleneck of the volumetric flask, and at this time, this device can be removed from the volumetric flask.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A non-destructive plug-pulling device for laboratory glass containers, comprising a housing (1) and a through groove (2) in the middle of the housing (1), characterized in that: A plurality of clamping blocks (3) for clamping a volumetric flask are arranged in the through groove (2). The clamping blocks (3) are simultaneously driven to move by a rotating frame (4). Two observation grooves (5) and two rising grooves (6) are symmetrically formed in the groove walls of the through groove (2). The two observation grooves (5) and the two rising grooves (6) are alternately and crosswise distributed on the groove walls of the through groove (2). A first clamping plate (7) and a second clamping plate (8) both in a "U" shape are respectively and slidably connected inside the two rising grooves (6). First clamping frames (9) and second clamping frames (10) for clamping a bottle stopper are fixedly connected to the inner end faces of the first clamping plate (7) and the second clamping plate (8). Two vertical rods of the second clamping frame (10) can be inserted into communication grooves (30) formed in two vertical rods on the first clamping frame (9) to cooperatively clamp the upper half of the bottle stopper (35). The first clamping plate (7) and the second clamping plate (8) are both slidably connected with sliders (12) through sliding grooves (11) formed therein. The sliders (12) are meshed with a screw rod (13). The screw rod (13) is driven by a rotating rod (14) arranged on the outer side wall of the upper end of the outer shell (1) to drive the first clamping frame (9) and the second clamping frame (10) to clamp the bottle stopper and move upward away from the volumetric flask. A push rod (15) is fixedly connected to the outer side wall of the clamping block (3). The outer end of the push rod (15) penetrates through the groove wall of the through groove (2) and extends into an empty groove (16) formed inside the outer shell (1), and is movably connected with an inclined groove (18) formed on the inner side face of a rotating ring (17). The rotating ring (17) is rotatably connected inside the empty groove (16), and the lower groove wall of the empty groove (16) is meshed with the rotating frame (4). The rotating frame (4) is slidably connected with the rotating ring (17) through a fixing rod (19) fixedly connected to the upper end thereof. A heating block (22) for heating the bottle body of the volumetric flask is arranged inside the clamping block (3). The heating block (22) is electrically connected to an external power supply through a conducting rod (23) fixedly connected to the outer side wall thereof. Two conducting rods (23) are connected to each heating block (22). The two conducting rods (23) penetrate through the groove wall of the through groove (2) and extend into a dark groove (32) formed inside the outer shell (1), and are respectively and movably connected with two conducting rings (29) inside the dark groove (32). The two conducting rings (29) are respectively connected to the positive and negative poles of an external power supply. When the conducting rod (23) moves along with the heating block (22), it forms a brush form with the conducting ring (29) to keep the circuit of the heating block (22) unobstructed. A through circular groove is formed in the lower groove wall of the empty groove (16). The upper end of the fixing rod (19) extends into a through hole (31) formed in the rotating ring (17) so that when the rotating frame (4) rotates, it drives the rotating ring (17) to rotate through the fixing rod (19). An internal thread is formed on the inner side wall of the rotating frame (4) and meshes with the groove wall of the circular groove on the lower side wall of the empty groove (16) so that the rotating ring (17) will not rotate randomly after rotating to any angle. The sliding block (12) is in the shape of an "I" character, and a plurality of protrusions (27) are fixedly connected to the inner side wall of the lower end thereof, and a plurality of slots (28) corresponding to the protrusions (27) are formed on the lower side walls of the first clamping plate (7) and the second clamping plate (8) and on both sides of the sliding groove (11).

2. The non-destructive plug-pulling device for laboratory glass containers according to claim 1, wherein: The push rod (15) is located on a side wall at one end of the inner portion of the hollow groove (16), and a circular plate (20) is fixedly sleeved thereon, and a spring (21) is connected between the circular plate (20) and the groove wall of the hollow groove (16).

3. The non-destructive plug-pulling device for laboratory glass containers according to claim 1, wherein: The heating block (22) is made of metal, and the heating block (22) is wrapped with soft rubber.

4. The non-destructive laboratory glass container stopper pulling device according to claim 1, characterized in that: The upper end of the screw rod (13) extends to the inside of an annular groove (24) formed on the outer wall of the upper end of the housing (1) and is fixedly connected to a gear (25). The gear (25) is meshedly connected to a gear ring (26) rotatably connected to the inside of the annular groove (24). The outer wall of the gear ring (26) is fixedly connected to the rotating rod (14).

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