Microwave digestion tank of microwave digestion instrument

Abstract

The invention discloses a microwave digestion tank of a microwave digestion instrument, which belongs to the field of microwave digestion tanks and is characterized in that an outer cover is pressed down by utilizing the principle that a locking wrench is pressed down to drive an extrusion disc to rotate, so that a supporting ring is firmly sleeved on an outer slope surface of an inner cover, and inner clamping ends on a plurality of elastic claws of the inner cover are firmly clamped on an annular clamping groove of a tank body; the quick connection of the self-locking tank cover and the tank body is realized, and meanwhile, the self-locking tank cover and the tank body are both made of polytetrafluoroethylene materials, so that the self-locking tank cover and the tank body cannot interfere with electromagnetic waves generated by the microwave digestion instrument when working in a digestion cavity of the microwave digestion instrument, and the safety in use is improved; and meanwhile, the structure that the outer cover is driven to move upwards through a plurality of elastic claws and a lifting handle is used for replacing the mode that a metal spring or a metal elastic piece is needed for supporting to achieve locking or resetting of the connecting position, normal implementation of a locking and resetting structure is not interfered, and rapid disassembly and assembly between the self-locking type tank cover and the tank body can be conveniently and smoothly achieved.

Description

Technical Field

[0001] The present invention relates to the field of microwave digestion vessels, and more particularly, to a microwave digestion vessel for a microwave digester. Background Art

[0002] A microwave digester uses a microwave generator inside it to generate electromagnetic waves, which are transmitted to the inside of the digestion chamber through a waveguide. The microwave energy is used to quickly heat the mixture of the sample and the acid solution, thereby creating a high-temperature and high-pressure environment to accelerate the decomposition of the sample. As the core component of the microwave digester, the performance of the microwave digestion vessel directly affects the digestion efficiency, safety and operation convenience.

[0003] Existing microwave digestion vessels usually include a vessel body and a lid, and their connection is usually realized by a threaded connection structure for detachable connection. Although such a connection structure is simple, in order to make the connection at the joint tighter and prevent loosening, it is usually necessary to additionally use a wrench to tighten or remove the lid during disassembly and assembly, which undoubtedly increases the complexity of disassembling and assembling the lid and is not very convenient to use;

[0004] At the same time, although a corresponding plug-in self-locking structure can be provided at the connection between the vessel body and the lid to achieve the quick disassembly and assembly of the vessel body and the lid, most plug-in self-locking structures need to be paired with components such as metal springs or metal shrapnel to achieve plug-in self-locking. However, the microwave digester will generate electromagnetic waves during operation. Therefore, when placing the plug-in self-locking structure of the vessel body and the lid with metal spring or metal shrapnel components inside the microwave digester, it will undoubtedly interfere with the normal operation of the microwave digester and even damage the microwave digester;

[0005] Therefore, based on the above, it is particularly necessary to design a quick plug-in self-locking structure at the connection between the vessel body and the lid, replace the threaded connection, and achieve the stable disassembly and assembly of the vessel body and the lid without the need to additionally use a wrench. Moreover, the components of the quick plug-in self-locking structure should not contain components such as metal springs or metal shrapnel that interfere with the electromagnetic waves generated inside the microwave digester. Therefore, we have proposed a microwave digestion vessel for a microwave digester to solve the above existing problems. Summary of the Invention

[0006] 1. Technical Problems to be Solved

[0007] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a microwave digestion tank for a microwave digestion instrument. Instead of using a threaded connection structure at the connection between the self-locking tank cover and the tank body, it utilizes the principle of driving the extrusion disc to rotate by pressing down the locking wrench, so that the outer cover is pressed down, firmly sleeving the support ring on the outer slope surface of the inner cover, and prompting the inner clamping ends on several elastic claws of the inner cover to firmly clamp on the annular clamping groove of the tank body, realizing the quick connection between the self-locking tank cover and the tank body. When disassembling, only need to reverse the locking wrench and lift the outer cover to avoid the outer elastic space of several inner clamping ends. At this time, the self-locking tank cover can be pulled off from the tank body, and the disassembly and assembly are simple and convenient.

[0008] 2. Technical solution

[0009] To solve the above problems, the present invention adopts the following technical solutions.

[0010] A microwave digestion tank for a microwave digestion instrument, comprising a self-locking tank cover and a tank body. The self-locking tank cover includes an inner cover. A plurality of elastic claws are equidistantly arranged on the inner cover. The elastic claws include an outer slope surface and an inner clamping end. A support edge is fixedly connected to the top of the outer wall of the inner cover. An inner top column is fixedly connected to the center position of the top of the inner cover. The top of the inner top column is detachably connected with a pressing handle;

[0011] An outer cover is sleeved outside the inner cover. A support ring is fixedly connected to the inner wall of the bottom of the outer cover. The inner edge of the support ring is in contact with the slope surface of the outer slope surface. The inner wall of the outer cover is in contact with the outer wall of the support edge. And a rubber ring is sleeved on the inner cover located at the top of the support edge. A lifting handle is fixedly connected to the center position of the top of the outer cover through a sleeve rod. A through channel is opened inside the sleeve rod. The top end of the inner top column extends to the top of the lifting handle through the through channel;

[0012] A shaft hole is opened on the inner top column. A group of avoidance openings are opened on the sleeve rod corresponding to the shaft hole position. A shaft rod is rotatably connected inside the shaft hole. Extrusion discs are arranged at both ends of the shaft rod. And insertion holes are eccentrically opened on both extrusion discs. The two ends of the shaft rod are respectively inserted into the inside of the two insertion holes. The two extrusion discs are fixedly connected through a locking wrench.

[0013] Furthermore, an annular clamping groove is opened on the outer wall of the tank body. A plurality of inner clamping ends are all clamped inside the annular clamping groove. A rubber sealing plug is sleeved on the top end of the tank body located at the contact position between the tank body and the inner cover.

[0014] Furthermore, an externally threaded nail body section is fixedly connected at the center position of the bottom of the pressing handle, an internally threaded mounting hole is opened at the center position of the top of the inner top column, and the inner top column and the pressing handle are detachably connected via the externally threaded nail body section and the internally threaded mounting hole.

[0015] Furthermore, both ends of the shaft rod are fixedly connected with ball heads, and the inner walls of the two sockets are provided with anti-dropping edges, and the ends of the shaft rod are plugged into the corresponding sockets through the corresponding ball heads and the anti-dropping edges.

[0016] Furthermore, the distance between the support ring and the support edge is equal to the distance between the lifting handle and the pressing handle, the inner edge diameter of the support ring is smaller than the outer wall diameter of the support edge, and the cross-sectional structure of the inner snap-fit ​​end matches the cross-sectional structure of the annular snap groove.

[0017] Furthermore, the self-locking tank cover and the tank body are both made of polytetrafluoroethylene, and the surfaces of the self-locking tank cover and the tank body are smooth and free of burrs.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] (1) This solution does not use a threaded connection structure at the connection between the self-locking tank cover and the tank body. Instead, it uses the principle of pressing down the locking wrench to drive the extrusion disk to rotate, so that the outer cover is pressed down, the support ring is firmly sleeved on the outer slope surface of the inner cover, and the inner clamping ends on the multiple spring claws of the inner cover are firmly clamped on the annular clamping groove of the tank body, so as to realize the quick connection between the self-locking tank cover and the tank body. When disassembling, it is only necessary to reversely pull the locking wrench and lift the outer cover to avoid the external elastic space of the multiple inner clamping ends. At this time, the self-locking tank cover can be pulled off the tank body, and the disassembly and assembly are simple and convenient;

[0021] (2) In this solution, the self-locking tank cover and the tank body are both made of polytetrafluoroethylene, so that the main components of the self-locking tank cover are all made of polytetrafluoroethylene. When placed in the digestion chamber of the microwave digester for operation, it will not interfere with the electromagnetic waves generated by the microwave digester, thereby improving safety during use. At the same time, a structure that drives the outer cover to move upward using a plurality of spring claws and a lifting handle replaces the need for support from a metal spring or metal shrapnel to achieve locking or resetting of the connection. This does not interfere with the normal implementation of the locking and resetting structure, and also facilitates the rapid disassembly and assembly between the self-locking tank cover and the tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2Schematic diagram of the tank body structure of the present invention;

[0024] Figure 3 Schematic sectional structure diagram of the self-locking tank cover of the present invention;

[0025] Figure 4 Schematic structure of the self-locking tank cover of the present invention Figure 1 ;

[0026] Figure 5 Schematic structure of the self-locking tank cover of the present invention Figure 2 (For convenient viewing, some areas have been cut away);

[0027] Figure 6 Schematic diagram of the split structure of the self-locking tank cover of the present invention;

[0028] Figure 7 Schematic diagram of the connection structure between the locking wrench and the two pressing disks of the present invention;

[0029] Figure 8 Schematic sectional structure diagram of the connection part at the end of the shaft rod of the present invention;

[0030] Figure 9 Schematic diagram of the outer cover structure of the present invention;

[0031] Figure 10 Schematic diagram of the inner cover structure of the present invention.

[0032] Explanation of the reference numerals in the figure:

[0033] 1. Self-locking tank cover; 2. Inner cover; 201. Elastic claw; 2011. Outer inclined plane; 2012. Inner clamping end; 202. Support edge; 203. Inner top column; 2031. Shaft hole; 2032. Inner threaded mounting hole; 204. Pressing handle; 2041. Outer threaded nail body section; 3. Outer cover; 301. Support ring; 302. Sleeve rod; 3021. Avoidance opening; 303. Lifting handle; 4. Rubber ring; 5. Shaft rod; 501. Ball head end; 6. Pressing disk; 601. Insertion hole; 6011. Anti-detachment clamping edge; 7. Locking wrench;

[0034] 8. Tank body; 801. Annular clamping groove;

[0035] 9. Rubber sealing plug. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings of the present invention specification; 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.

[0037] Example 1:

[0038] Please refer to Figures 1 - 10 , a microwave digestion tank of a microwave digester, which includes a self-locking tank cover 1 and a tank body 8. The self-locking tank cover 1 includes an inner cover 2. A number of elastic claws 201 are equidistantly arranged on the inner cover 2. The elastic claws 201 include an outer slope surface 2011 and an inner clamping end 2012. A support edge 202 is fixedly connected to the top of the outer wall of the inner cover 2. An inner top column 203 is fixedly connected to the center position of the top of the inner cover 2. The top of the inner top column 203 is detachably connected with a pressing handle 204;

[0039] An outer cover 3 is sleeved outside the inner cover 2. A support ring 301 is fixedly connected to the inner wall of the bottom of the outer cover 3. The inner edge of the support ring 301 is in contact with the slope surface of the outer slope surface 2011. The inner wall of the outer cover 3 is in contact with the outer wall of the support edge 202. And a rubber ring 4 is sleeved on the inner cover 2 located at the top of the support edge 202. A lifting handle 303 is fixedly connected to the center position of the top of the outer cover 3 through a sleeve rod 302. A through channel is opened inside the sleeve rod 302. The top end of the inner top column 203 extends to the top of the lifting handle 303 through the through channel;

[0040] A shaft hole 2031 is opened on the inner top column 203. A group of avoidance openings 3021 are opened on the sleeve rod 302 corresponding to the position of the shaft hole 2031. A shaft rod 5 is rotatably connected inside the shaft hole 2031. Extrusion disks 6 are arranged at both ends of the shaft rod 5. And insertion holes 601 are eccentrically opened on both extrusion disks 6. Both ends of the shaft rod 5 are respectively inserted into the inside of the two insertion holes 601. The two extrusion disks 6 are fixedly connected through a locking wrench 7;

[0041] An annular clamping groove 801 is opened on the outer wall of the tank body 8. A number of inner clamping ends 2012 are all clamped inside the annular clamping groove 801. A rubber sealing plug 9 is sleeved on the top end of the tank body 8 at the contact position between the tank body 8 and the inner cover 2.

[0042] The usage principle of the microwave digestion tank of this kind of microwave digester is as follows:

[0043] When the self-locking can lid 1 needs to be installed on the can body 8, first cover the rubber sealing plug 9 on the top end of the can body 8 filled with the sample solution inside to improve the sealing performance at the contact position between the can body 8 and the inner lid 2 in the later stage. Then, lift the outer lid 3 outside the inner lid 2 by pulling up the connection between the lifting handle 303 and the sleeve rod 302 with fingers, exposing several elastic claws 201 on the inner lid 2 to create an avoidance space for the inner clamping ends 2012 on the several elastic claws 201 to pop up later. Then, directly buckle the bottom of the inner lid 2 on the top end of the can body 8, and press the pressing handle 204 with fingers, so that through the connection of the inner top column 203, the inner lid 2 is firmly buckled on the top end of the can body 8, and the inner clamping ends 2012 of the several elastic claws 201 are all stuck inside the annular clamping groove 801 to prevent the detachment at the connection between the inner lid 2 and the top end of the can body 8. Then, press the lifting handle 303 downward with fingers to prompt the outer lid 3 to move downward. At this time, through the slope structure setting of the support ring 301 and the outer slope surface 2011 (the slope cross-sectional structure of the outer slope surface 2011 is specifically a tapered structure with a narrow top and a wide bottom), the support ring 301 can be firmly sleeved outside the several inner clamping ends 2012 to prevent the several inner clamping ends 2012 from expanding outward and causing the loosening of the connection in the later stage. Finally, turn the locking wrench 7 downward and drive the two pressing discs 6 to rotate. At this time, since the two pressing discs 6 are eccentrically rotationally connected by the shaft rod 5, a downward pressure can be generated at the outer edges of the two pressing discs 6 during the rotation process. Thus, after contacting the top of the outer lid 3, the outer lid 3 can be firmly locked in the downward pressing state to maintain the stability of the position between the support ring 301 and the several inner clamping ends 2012. At this time, the plug-in assembly process between the self-locking can lid 1 and the can body 8 is completed, and then the microwave digestion tank is placed on the tank rack inside the microwave digester to facilitate the later digestion work;

[0044] When the self-locking can lid 1 needs to be removed from the can body 8, based on the above, only need to first turn the locking wrench 7 upward in the reverse direction to the reset state. At this time, the top of the outer lid 3 loses the extrusion force of the two pressing discs 6. Then, lift the lifting handle 303 upward with fingers to prompt the outer lid 3 to move upward and expose several elastic claws 201 to create an avoidance space for the several elastic claws 201 to pop out outward during the extraction process. At this time, as the lifting handle 303 is continuously lifted upward, the contact between the bottom of the avoidance opening 3021 and the shaft rod 5 can drive the inner lid 2 to be lifted upward, so that the several inner clamping ends 2012 are disengaged from the clamping with the annular clamping groove 801, and the process of removing the self-locking can lid 1 from the can body 8 can be realized.

[0045] Embodiment 2:

[0046] In view of the above Embodiment 1, for further description, refer to Figure 3 and Figure 6, a threaded nail body section 2041 is fixedly connected to the center position at the bottom of the pressing handle 204. An internal threaded mounting hole 2032 is provided at the center position at the top of the internal top column 203. The internal top column 203 and the pressing handle 204 are detachably connected through the threaded nail body section 2041 and the internal threaded mounting hole 2032. Through the design of the detachable connection structure between the internal top column 203 and the pressing handle 204 through the threaded nail body section 2041 and the internal threaded mounting hole 2032, it is convenient for the internal top column 203 to be smoothly inserted into the through channel inside the sleeve rod 302 during installation, avoiding interference during installation;

[0047] Ball head ends 501 are fixedly connected to both ends of the shaft rod 5. Anti - detachment clamping edges 6011 are provided on the inner walls of the two jacks 601. The end of the shaft rod 5 is inserted into the corresponding jack 601 through the corresponding ball head end 501 and the anti - detachment clamping edge 6011. Through the structural design of the ball head ends 501 at both ends of the shaft rod 5 and the anti - detachment clamping edges 6011 on the inner wall of the jack 601, during installation, the two ends of the shaft rod 5 can be directly inserted into the two jacks 601, which not only does not interfere with the rotational connection at the joint, but also is convenient for installation and reduces the risk of detachment at the joint;

[0048] The distance between the support ring 301 and the support edge 202 is equal to the distance between the lifting handle 303 and the pressing handle 204. The inner diameter of the inner edge of the support ring 301 is smaller than the outer diameter of the support edge 202. The cross - sectional structure of the inner clamping end 2012 fits the cross - sectional structure of the annular clamping groove 801. Through the structural design that the distance between the support ring 301 and the support edge 202 is equal to the distance between the lifting handle 303 and the pressing handle 204, the lifting distance of the lifting handle 303 can be increased, thereby increasing the upward movement distance of the outer cover 3 and avoiding interference when several elastic claws 201 expand outward. Through the fact that the inner diameter of the inner edge of the support ring 301 is smaller than the outer diameter of the support edge 202, the structural stability of the outer cover 3 sleeved on the inner cover 2 can be improved, preventing detachment from each other. Through the structural design that the cross - sectional structure of the inner clamping end 2012 fits the cross - sectional structure of the annular clamping groove 801, the structural stability at the joint can be improved;

[0049] Both the self - locking can lid 1 and the can body 8 are made of polytetrafluoroethylene, so that the inner cover 2, the elastic claws 201, the outer slope surface 2011, the inner clamping end 2012, the support edge 202, the internal top column 203, the shaft hole 2031, the internal threaded mounting hole 2032, the pressing handle 204, the threaded nail body section 2041, the outer cover 3, the support ring 301, the sleeve rod 302, the avoidance opening 3021, the lifting handle 303, the shaft rod 5, the ball head end 501, the extrusion disc 6, the jack 601, the anti - detachment clamping edge 6011, the locking wrench 7, the can body 8 and the annular clamping groove 801 are all made of polytetrafluoroethylene, avoiding the use of metal components such as metal springs or metal shrapnel and preventing interference with the normal operation of the microwave digestion instrument.

[0050] As described above, it is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A microwave digestion tank of a microwave digestion instrument, comprising a self-locking tank cover (1) and a tank body (8), characterized in that: The self-locking can lid (1) comprises an inner lid (2), a plurality of spring claws (201) are equidistantly provided on the inner lid (2), the spring claws (201) comprise an outer slope surface (2011) and an inner clamping end (2012), a support edge (202) is fixedly connected to the top of the outer wall of the inner lid (2), an inner top column (203) is fixedly connected at the center position of the top of the inner lid (2), and a pressing handle (204) is detachably connected to the top of the inner top column (203); The outer side of the inner cover (2) is sleeved with the outer cover (3); a support ring (301) is fixedly connected to the inner wall of the bottom of the outer cover (3); the inner edge of the support ring (301) contacts the slope of the outer slope surface (2011); the inner wall of the outer cover (3) contacts the outer wall of the support edge (202); a rubber ring (4) is sleeved on the inner cover (2) located at the top of the support edge (202); a lifting handle (303) is fixedly connected to the center of the top of the outer cover (3) through a sleeve rod (302); a through channel is opened inside the sleeve rod (302); the top end of the inner top column (203) extends to the top of the lifting handle (303) through the through channel; The inner top column (203) is provided with an axial hole (2031), and a group of avoidance openings (3021) are provided on the sleeve rod (302) at the position corresponding to the axial hole (2031). The axial hole (2031) is rotatably connected to a shaft rod (5). Both ends of the shaft rod (5) are provided with extrusion disks (6), and both of the two extrusion disks (6) are eccentrically provided with insertion holes (601). The two ends of the shaft rod (5) are respectively plugged into the inside of the two insertion holes (601), and the two extrusion disks (6) are fixedly connected by a locking wrench (7).

2. The microwave digestion tank of a microwave digestion instrument according to claim 1, characterized in that: An annular groove (801) is provided on the outer wall of the tank body (8), and a plurality of inner snap-fit ​​ends (2012) are snap-fitted to the inside of the annular groove (801). A rubber sealing plug (9) is sleeved on the top end of the tank body (8) at the contact position between the tank body (8) and the inner cover (2).

3. The microwave digestion tank of a microwave digestion instrument according to claim 1, characterized in that: An externally threaded nail body section (2041) is fixedly connected at the center position of the bottom of the pressing handle (204), and an internally threaded mounting hole (2032) is opened at the center position of the top of the inner top column (203). The inner top column (203) and the pressing handle (204) are detachably connected via the externally threaded nail body section (2041) and the internally threaded mounting hole (2032).

4. The microwave digestion tank of a microwave digestion instrument according to claim 1, characterized in that: Both ends of the shaft rod (5) are fixedly connected with ball heads (501), and the inner walls of the two insertion holes (601) are provided with anti-dropping edges (6011). The ends of the shaft rod (5) are plugged into the corresponding insertion holes (601) through the corresponding ball heads (501) and the anti-dropping edges (6011).

5. The microwave digestion tank of a microwave digestion instrument according to claim 2, characterized in that: The distance between the support ring (301) and the support edge (202) is equal to the distance between the lifting handle (303) and the pressing handle (204), the inner edge diameter of the support ring (301) is smaller than the outer wall diameter of the support edge (202), and the cross-sectional structure of the inner snap-fit ​​end (2012) is consistent with the cross-sectional structure of the annular snap-fit ​​groove (801).

6. The microwave digestion tank of a microwave digestion instrument according to claim 1, characterized in that: The self-locking tank cover (1) and the tank body (8) are both made of polytetrafluoroethylene, and the surfaces of the self-locking tank cover (1) and the tank body (8) are smooth and free of burrs.

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