Crucible tongs

Abstract

The utility model relates to a crucible clamping tool, and provides crucible tongs. The crucible tongs comprise an operation part and a clamping part, the clamping part is detachably connected to the operation part through an installation assembly, and the operation part is suitable for driving the clamping part to clamp a crucible or other objects. The clamping part and the operating part of the crucible tongs provided by the utility model are detachably connected through the mounting assembly, so that the clamping part can be replaced to clamp crucibles or objects with different shapes or sizes to meet different use requirements, the laboratory cost can be reduced, and the working efficiency is improved. And the situation of danger caused by unstable clamping when crucible tongs with inconsistent sizes are used for clamping the crucible can also be reduced.

Description

Technical Field

[0001] The present disclosure relates to a crucible clamping tool, and more particularly to a pair of crucible tongs. Background Art

[0002] In enterprises and university laboratories, crucible tongs are essential experimental instruments. In applications such as high-temperature heating or melting of metals, glass, ceramics, etc., crucible tongs not only need to hold heated solid substances and molten samples, but also need to hold crucibles, crucible lids, beakers, evaporating dishes, etc., and need to hold and perform chemical reactions and other operations under high-temperature conditions. This requires crucible tongs to not only have high heat resistance, corrosion resistance, stability, and flexibility. Especially in the experiment of melting samples of molten glass and other inorganic non-metallic materials, after melting samples in noble metal crucibles (such as platinum-rhodium crucibles, platinum crucibles, platinum-yellow crucibles, silver crucibles, etc.), it is necessary to use crucible tongs to pour out the molten samples. However, noble metal crucibles all have the disadvantages of being soft and easy to deform, which places too high requirements on the crucible tongs for holding the crucible and the level of the experimental operator.

[0003] Currently, the crucible tongs used in laboratories mostly focus on several points or the clamping head line at the front edge of the crucible tongs when holding the crucible. This way of force application is extremely likely to squeeze the crucible, causing deformation of the noble metal crucible; the force application method of points and lines is also extremely likely to cause tipping and dropping when clamping a heavier crucible. Moreover, when pouring and molding molten liquids such as glass or ceramics, the holding time of the crucible tongs is relatively long, and there are too high requirements for the tilting angle of the crucible tongs, the holding method of the crucible tongs, and the holding stability. There is no crucible tong in the prior art that can better meet the clamping requirements of noble metal crucibles.

[0004] In addition, the sizes of crucibles are different, and the size of the clamping part of the crucible tongs is not adjustable. In actual use, there are requirements for the size and shape of the front clamping end of the crucible tongs, resulting in the need to purchase multiple pairs of crucible tongs according to the sizes of different crucibles, increasing the cost of laboratory instruments. Although CN106078549A designs a pair of crucible tongs suitable for beginners to use, which can, to a certain extent, allow beginners to safely use the crucible tongs to hold utensils and reduce the situation of tipping over and dropping; however, the places where the clamping end of the crucible tongs is stressed during use are still several points, and the problem is not solved at the root. Moreover, the application range of this crucible tong is relatively narrow and can only be applied to crucibles of fixed sizes, which is also not conducive to cost reduction. Summary of the Utility Model

[0005] One technical problem to be solved by the present disclosure is that multiple pairs of crucible tongs need to be purchased to hold crucibles of different sizes or shapes, which will increase the cost of the laboratory; and the existing crucible tongs with point and line force application methods are easy to squeeze the crucible and cause deformation, and the clamping operation is unstable, easy to cause tipping and dropping.

[0006] To solve the above technical problems, an embodiment of the present disclosure provides a pair of tongs, including:

[0007] An operation part and a clamping part, the clamping part is detachably connected to the operation part through a mounting assembly, a pair of jaws adapted to make line contact or surface contact with the outer periphery of an object are provided at one end of the clamping part away from the operation part, and the operation part is adapted to drive the jaws to clamp the object.

[0008] In some embodiments, the operation part includes a first tong body and a second tong body, the middle parts of the first tong body and the second tong body are hinged to each other, and an operation member is provided at one end of both, and the other end is detachably connected to the clamping part through a mounting assembly.

[0009] In some embodiments, the operation member is a finger ring.

[0010] In some embodiments, a tightening member is provided at one end of the operation part away from the clamping part, one end of the tightening member is connected to the first tong body, and the other end is connected to the second tong body.

[0011] In some embodiments, the clamping part includes a first clamping plate and a second clamping plate, one end of the first clamping plate is detachably connected to the first tong body through a mounting assembly, a jaw is provided at the other end, and one end of the second clamping plate is detachably connected to the second tong body through a mounting assembly, and a jaw is provided at the other end.

[0012] In some embodiments, when the two jaws are in contact with each other, they are in a ring shape, a prism shape, a cylindrical shape or a cone-bottom shape.

[0013] In some embodiments, a protective pad is provided on the inner surface of the jaws.

[0014] In some embodiments, positioning grooves are provided at one end of the first tong body and the second tong body away from the operation member, one end of the first clamping plate away from the jaw is adapted to be embedded in the positioning groove on the first tong body, and one end of the second clamping plate away from the jaw is adapted to be embedded in the positioning groove on the second tong body.

[0015] In some embodiments, the mounting assembly includes a plurality of bolts and nuts corresponding to the bolts one by one, through holes are provided on the clamping part, mounting holes are provided on the operation part, and the bolts are adapted to pass through the through holes and the mounting holes and be fastened by the nuts.

[0016] In some embodiments, a spring washer is sleeved on the bolt, and the bolt is adapted to press the spring washer against the clamping part or the operation part.

[0017] Through the above technical solution, the crucible tongs provided by the present disclosure are composed of an operation part and a clamping part. The clamping part is detachably connected to the operation part through an installation component. The operation part drives the clamping part to clamp the crucible, which enables the clamping part to be replaced to clamp crucibles of different shapes or sizes. This can not only reduce the laboratory cost but also reduce the risk of danger caused by unstable clamping when using crucible tongs with inconsistent sizes to clamp the crucible. At the same time, the clamping part is provided with jaws that can make line contact or surface contact with the outer circumference of the crucible. By replacing the jaws that make surface contact with the crucible, the force-bearing area between the crucible tongs and the crucible can be effectively increased, which not only will not cause local extrusion of the crucible but also improve the stability and safety during the clamping process of the crucible tongs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 is a schematic structural diagram of the crucible tongs disclosed in the embodiment of the present disclosure;

[0020] Figure 2 is a schematic structural diagram of the operation part disclosed in the embodiment of the present disclosure;

[0021] Figure 3 is a schematic partial structural diagram of the crucible tongs disclosed in the embodiment of the present disclosure;

[0022] Figure 4 is a schematic structural diagram of the clamping part disclosed in the embodiment of the present disclosure.

[0023] Description of the reference numerals:

[0024] 1. Operation part; 11. First tong body; 12. Second tong body; 2. Clamping part; 21. First clamping plate; 22. Second clamping plate; 23. Jaws; 3. Installation component; 31. Bolt; 32. Nut; 4. Operating member; 41. First finger ring; 42. Second finger ring; 5. Tightening member; 6. Protective pad; 7. Positioning groove; 8. Spring washer; 9. Through hole; 10. Installation hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following further describes the embodiments of the present disclosure in conjunction with the accompanying drawings and embodiments. The detailed description of the following embodiments and the drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms, not limited to the specific embodiments disclosed herein, but including all technical solutions falling within the scope of the claims.

[0026] These embodiments are provided by the present disclosure to make the present disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the components of materials, numerical expressions and values set forth in these embodiments should be construed as merely exemplary, rather than as limitations.

[0027] It should be noted that in the description of the present disclosure, unless otherwise specified, the meaning of "a plurality" is greater than or equal to two; terms such as "inner", "outer", etc. indicating the orientation or positional relationship are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0028] In addition, the "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different parts. Words such as "including" or "comprising" mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.

[0029] It should also be noted that in the description of the present disclosure, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0030] All terms used in the present disclosure have the same meaning as understood by those of ordinary skill in the art to which the present disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as those, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0031] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and devices should be regarded as part of the specification.

[0032] The present disclosure provides a pair of tongs, see Figures 1 to 4 , including: an operation part 1 and a clamping part 2. The clamping part 2 is detachably connected to the operation part 1 through a mounting assembly 3. One end of the clamping part 2 far from the operation part 1 is provided with a jaw 23 adapted to make line contact or surface contact with the outer periphery of an object, and the operation part 1 is adapted to drive the jaw 23 to clamp the object.

[0033] The pair of tongs provided by the present disclosure is composed of an operation part 1 and a clamping part 2. The clamping part 2 is detachably connected to the operation part 1 through a mounting assembly 3. The operation part 1 drives the jaw 23 of the clamping part 2 to clamp a crucible or other object, which enables the clamping part 2 to be selected and replaced according to different objects and crucibles of different sizes and shapes, expanding the scope of use, reducing the laboratory cost, and reducing the risk of instability during clamping when using a pair of tongs with an inappropriate size to clamp a crucible or other object; at the same time, the clamping part 2 is provided with a jaw 23 capable of making line contact or surface contact with the outer periphery of a crucible or other object. By replacing the jaw 23 in surface contact with the crucible, the force-bearing area between the pair of tongs and the crucible can be effectively increased, which not only does not cause local extrusion deformation of the crucible, but also improves the stability and safety during the clamping process of the pair of tongs, especially beneficial to the clamping of precious metal crucibles.

[0034] In the present disclosure, when the jaws 23 are in contact with each other, they can be in a ring shape (round ring, square ring or other shaped rings) to form line contact with the outer periphery of a crucible or other object during clamping; preferably, when the jaws 23 are in contact with each other, they are in a prismatic shape, cylindrical shape or conical bottom shape, so that the inner surface of the jaws 23 forms surface contact with the outer periphery of a crucible or other object during clamping. The large contact area with the object to be clamped can reduce the force, not only reducing the physical consumption of the experimenter and avoiding muscle fatigue caused by the experimenter clamping the crucible for a long time, but also improving the clamping stability and operation safety. The different shapes of the jaws 23 can not only improve the clamping stability of the pair of tongs for crucibles of different sizes or shapes, but also reduce the situation of preparing multiple pairs of tongs according to different crucibles.

[0035] In the present disclosure, the operation part 1 can adopt any structure that can be held by hand and drive the jaws 23 to open or bite. In some embodiments, the operation part 1 includes a first tong body 11 and a second tong body 12. The middle parts of the first tong body 11 and the second tong body 12 are hinged to each other, that is, the first tong body 11 can rotate around the hinge point of the first tong body 11 and the second tong body 12, and the second tong body 12 can rotate around the hinge point of the first tong body 11 and the second tong body 12, so as to drive the clamping part 2 to clamp the crucible.

[0036] In some embodiments, an operating member 4 is further provided on the operating portion 1. Specifically, the operating member 4 is a finger ring. In an optimal embodiment of the present disclosure, the operating member 4 includes a first finger ring 41 and a second finger ring 42. The first finger ring 41 is disposed at one end of the first jaw 11 and is adapted for multiple fingers to extend therein. The second finger ring 42 is disposed at one end of the second jaw 12 and is adapted for a single finger to extend therein. One end of the clamping portion 2 is connected to the end of the first jaw 11 remote from the first finger ring 41, and the other end of the clamping portion 2 is connected to the end of the second jaw 12 remote from the second finger ring 42. During operation, the thumb can be inserted into the second finger ring 42, and multiple fingers other than the thumb can be inserted into the first finger ring 41. Then, the operating portion 1 can be used to drive the clamping portion 2 to clamp the crucible, which can reduce the possibility of danger caused by the operating portion 1 slipping out of the hand.

[0037] In some embodiments, a tightening member 5 is further provided between the first jaw 11 and the second jaw 12. The tightening member 5 can be an elastic member such as a spring or an elastic cord. In an embodiment of the present disclosure, a spring is taken as an example. One end of the tightening member 5 is connected to the end of the first jaw 11 remote from the clamping portion 2, and the other end of the tightening member 5 is connected to the end of the second jaw 12 remote from the clamping portion 2. The tightening member 5 can limit the relative rotation angle between the first jaw 11 and the second jaw 12, so as to reduce the situation that the clamping portion 2 heated by the crucible touches the hand due to the excessive rotation angle of the first jaw 11 or the second jaw 12, and can also reduce the hand force during the clamping operation to a certain extent.

[0038] In some embodiments, the clamping portion 2 includes a first clamping plate 21 and a second clamping plate 22. One end of the first clamping plate 21 is detachably connected to the end of the first jaw 11 remote from the first finger ring 41 through the mounting assembly 3, and the other end is provided with a clamping jaw 23. The second clamping plate 22 is detachably connected to the end of the second jaw 12 remote from the second finger ring 42 through the mounting assembly 3, and the other end is provided with a clamping jaw 23. During operation, the first clamping plate 21 and the second clamping plate 22 can be opened by the operating member 4, the first jaw 11 and the second jaw 12. Then, by applying a force that makes the first finger ring 41 and the second finger ring 42 tend to approach each other, the first clamping plate 21 and the second clamping plate 22 can clamp the crucible.

[0039] In some embodiments, positioning grooves 7 are formed on the side of the first jaw body 11 facing the second jaw body 12 and the side of the second jaw body 12 facing the first jaw body 11. The positioning grooves 7 are located at the ends of the first jaw body 11 and the second jaw body 12 away from the operating member 4. One end of the first clamping plate 21 away from the clamping jaw 23 is adapted to be embedded in the positioning groove 7 on the first jaw body 11, and one end of the second clamping plate 22 away from the clamping jaw 23 is adapted to be embedded in the positioning groove 7 on the second jaw body 12. That is, when installing the clamping portion 2, first, the first clamping plate 21 and the second clamping plate 22 are embedded in the positioning groove 7 for pre-positioning, and then the first clamping plate 21 is fixed to the first jaw body 11 and the second clamping plate 22 is fixed to the second jaw body 12 through the installation assembly 3. This is convenient for operation and reduces the possibility that the first clamping plate 21 or the second clamping plate 22 is displaced, resulting in insufficient clamping of the crucible.

[0040] In some embodiments, the installation assembly 3 includes a plurality of bolts 31 and nuts 32 corresponding to the bolts 31 one by one. Through holes 9 are formed in both the first clamping plate 21 and the second clamping plate 22. The plurality of through holes 9 are distributed along the length direction of the first clamping plate 21 or the second clamping plate 22. Installation holes 10 corresponding to the through holes 9 are formed at the positioning grooves 7 on the first jaw body 11 and the second jaw body 12. When installing the clamping portion 2, first, the first clamping plate 21 and the second clamping plate 22 are respectively embedded in the positioning groove 7 for positioning, then the bolts 31 are passed through the through holes 9 and the installation holes 10, and then the nuts 32 are used to fasten the bolts 31 one by one. This structure makes the clamping portion 2 easy to disassemble and replace, and the plurality of bolts 31 and nuts 32 arranged along the length direction of the crucible tongs can stably fix the clamping portion 2 to reduce the situation that the crucible slips out of the clamping portion 2 due to the rotation of the clamping portion 2.

[0041] In some embodiments, to improve the fixing stability of the installation assembly 3 to the clamping portion 2, a spring washer 8 is sleeved on the bolt 31. After the nut 32 fastens the bolt 31, the bolt 31 presses the spring washer 8 against the operating portion 1 or the clamping portion 2, which can apply friction between the bolt 31 and the operating portion 1 or between the bolt 31 and the clamping portion 2 to reduce the situation that the bolt 31 rotates and separates from the nut 32, resulting in the clamping portion 2 detaching from the operating portion 1.

[0042] In some embodiments, to improve the clamping stability of the clamping portion 2 on the crucible, clamping jaws 23 are connected to the ends of the first clamping plate 21 and the second clamping plate 22 away from the operating portion 1. When the clamping portion 2 is driven by the operating portion 1 to clamp the crucible, the two clamping jaws 23 firmly clamp the crucible. However, it is also possible that the ends of the first clamping plate 21 and the second clamping plate 22 away from the operating portion 1 are directly provided with a flat plate structure to clamp an article with a corresponding outer peripheral shape. The first clamping plate 21 and the second clamping plate 22 are both mounted on the operating portion 1 through the mounting assembly 3. Therefore, the first clamping plate 21 and the second clamping plate 22 can both be replaced, that is, the clamping jaws 23 can be replaced according to the shape and size of the crucible to be clamped.

[0043] In some embodiments, a protective pad 6 is provided on the inner surface of the clamping jaws 23. The material of the protective pad 6 is a high-temperature resistant material such as asbestos or a high-temperature resistant paint surface. When the clamping jaws 23 clamp the crucible, the protective pad 6 abuts against the crucible. On the one hand, the protective pad 6 can protect the crucible and reduce the deformation of the crucible under the clamping of the clamping jaws 23. On the other hand, the protective pad 6 can also protect the clamping jaws 23 and reduce the possibility that the clamping jaws 23 are deformed at high temperatures, resulting in loosening of the clamping of the crucible.

[0044] So far, the embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details known in the art have not been described. Those skilled in the art can clearly understand how to implement the technical solutions disclosed herein based on the above description.

[0045] The present disclosure provides a crucible tongs, including:

[0046] An operating portion 1 and a clamping portion 2. The clamping portion 2 is detachably connected to the operating portion 1 through a mounting assembly 3. The operating portion 1 includes a first pliers body 11 and a second pliers body 12. The middle parts of the first pliers body 11 and the second pliers body 12 are hinged to each other. One end of both is provided with an operating member 4, and the other end is detachably connected to the clamping portion 2 through the mounting assembly 3. Positioning grooves 7 are provided at the ends of the first pliers body 11 and the second pliers body 12 away from the operating member 4. An adjusting member 5 is provided at the end of the operating portion 1 away from the clamping portion 2. One end of the adjusting member 5 is connected to the first pliers body 11, and the other end is connected to the second pliers body 12. The above-mentioned clamping portion 2 includes a first clamping plate 21 and a second clamping plate 22. The first clamping plate 21 is detachably connected to the first pliers body 11 through the mounting assembly 3. The second clamping plate 22 is detachably connected to the second pliers body 12 through the mounting assembly 3. Clamping jaws 23 are provided at the ends of the first clamping plate 21 and the second clamping plate 22 away from the operating portion 1. The mounting assembly 3 includes a plurality of bolts 31 and nuts 32 corresponding to the bolts 31 one by one. Through holes 9 are provided on the clamping portion 2, and mounting holes 10 are provided on the operating portion 1. The bolts 31 are adapted to pass through the through holes 9 and the mounting holes 10 and are fastened by the nuts 32. Spring washers 8 are sleeved on the bolts 31.

[0047] In summary, a pair of tongs according to the present disclosure has the following advantages: Select the clamping part 2 adapted to the crucible to be clamped. Embed the first clamping plate 21 and the second clamping plate 22 into the positioning grooves 7 respectively for pre-positioning. Then, pass the bolt 31 through the spring washer 8, the mounting hole 10 and the through hole 9 and fasten it with the nut 32, and the clamping part 2 can be firmly fixed on the operating part 1. This is not only convenient to operate, but also enables the pair of tongs to clamp crucibles of different shapes or sizes, which can not only improve the clamping stability of the pair of tongs for crucibles of different sizes or shapes, but also reduce the situation of preparing multiple pairs of tongs according to different crucibles. Insert the thumb into the second finger ring 42 and insert multiple fingers except the thumb into the first finger ring 41. First, open the first clamping plate 21 and the second clamping plate 22, and then apply a force that makes the first finger ring 41 and the second finger ring 42 tend to approach each other, so that the jaws 23 that are annular, prismatic, cylindrical or conical-bottomed when they fit can firmly clamp the crucible, which helps to ensure the safety of the pair of tongs when clamping the crucible.

[0048] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way.

Claims

1. A pair of tongs, characterized in that, Comprising: An operating part (1); A clamping part (2), the clamping part (2) is detachably connected to the operating part (1) through a mounting assembly (3), and a clamping jaw (23) adapted to make line contact or surface contact with the outer periphery of an object is provided at one end of the clamping part (2) away from the operating part (1), and the operating part (1) is adapted to drive the clamping jaw (23) to clamp the object; The operating part (1) includes a first clamping body (11) and a second clamping body (12). The middle parts of the first clamping body (11) and the second clamping body (12) are hinged to each other, and an operating member (4) is provided at one end of both of them, and the other end is detachably connected to the clamping part (2) through the mounting assembly (3). The clamping part (2) includes a first clamping plate (21) and a second clamping plate (22). One end of the first clamping plate (21) is detachably connected to the first clamping body (11) through the mounting assembly (3), and the clamping jaw (23) is provided at the other end. One end of the second clamping plate (22) is detachably connected to the second clamping body (12) through the mounting assembly (3), and the clamping jaw (23) is provided at the other end. Positioning grooves (7) are provided at one ends of the first clamping body (11) and the second clamping body (12) away from the operating member (4). One end of the first clamping plate (21) away from the clamping jaw (23) is adapted to be embedded in the positioning groove (7) on the first clamping body (11), and one end of the second clamping plate (22) away from the clamping jaw (23) is adapted to be embedded in the positioning groove (7) on the second clamping body (12).

2. The crucible tongs according to claim 1, wherein, The operating member (4) is a finger ring.

3. The crucible tongs according to claim 1, characterized in that, One end of the operating part (1) away from the clamping part (2) is provided with a tightening member (5), one end of the tightening member (5) is connected to the first clamping body (11), and the other end is connected to the second clamping body (12).

4. The crucible tongs according to claim 1, characterized in that, When the two clamping jaws (23) are in contact with each other, they are in a ring shape, a prism shape, a cylindrical shape or a cone bottom shape.

5. The crucible tongs according to claim 4, characterized in that, A protective pad (6) is provided on the inner surface of the clamping jaw (23).

6. The crucible tongs according to any one of claims 1 to 5, characterized in that The mounting assembly (3) includes a plurality of bolts (31) and nuts (32) corresponding to the bolts (31) one by one. Through holes (9) are provided on the clamping part (2), and mounting holes (10) are provided on the operating part (1). The bolts (31) are adapted to pass through the through holes (9) and the mounting holes (10) and be tightened by the nuts (32).

7. The crucible tongs according to claim 6, characterized in that, A spring washer (8) is sleeved on the bolt (31), and the bolt (31) is adapted to press the spring washer (8) against the clamping part (2) or the operating part (1).

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