Heating wire sealing and clamping device for vacuum porcelain furnace

Abstract

A heating wire sealing and clamping device for a vacuum porcelain furnace comprises an electrode bolt, a collet chuck, a locking nut and a sealing cap, the electrode bolt and the collet chuck are conductive, a through hole with a conical step is formed in the electrode bolt in the axial direction of a screw rod, an internal thread is arranged on the inner wall of the large-diameter section of the through hole, and the inner wall of the large-diameter section of the through hole is provided with an external thread. The locking nut is provided with an external thread matched with the internal thread of the electrode bolt, the collet is inserted into the inner hole of the electrode bolt after clamping the electric heating wire, the collet is clamped at the conical step of the through hole of the electrode bolt, and the locking nut penetrates through the collet and is screwed into the internal thread hole of the electrode bolt to tightly press the collet. And the sealing cap is sleeved on the head part of the electrode bolt. According to the utility model, not only can a good sealing effect be obtained for the vacuum porcelain furnace, but also the broken electric heating wire can be quickly replaced, and the sealing effect is not influenced after the electric heating wire is replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of dental porcelain furnaces, in particular to an electric heating wire sealing clamping device for a vacuum porcelain furnace used for dental porcelain firing. Background Art

[0002] Porcelain firing is a dental technology, generally called porcelain teeth. This kind of restoration has the advantages of high strength of metal, beauty of porcelain, verisimilitude of teeth, wear resistance, etc. For the restoration of missing anterior and posterior teeth, it can achieve the ideal functions and forms of missing teeth restoration. It can improve pronunciation, and make the restoration harmonious with adjacent teeth, lips, occlusion, and facial shape, giving oneself and others a complete and harmonious aesthetic feeling. In addition to restoring missing teeth, this technology can also be used to restore discolored, fluorotic, enamel hypoplastic, conical and partially defective anterior teeth. For the situation where the shape of the posterior teeth cannot be restored after large-area defect repair, the original appearance of the teeth can also be restored through this porcelain teeth technology.

[0003] Dental porcelain firing is usually carried out in a vacuum state. In a vacuum state, after the ceramic melts, there are no pores inside and the appearance quality is very good. The commonly used sintering equipment for dental porcelain firing is a vacuum porcelain furnace. Existing vacuum porcelain furnaces such as a vacuum porcelain furnace for dental use disclosed in the Chinese patent with the application number CN201821454880.X on May 17, 2019, and another vacuum porcelain furnace disclosed in the Chinese patent with the application number CN201921179139.1 on May 5, 2020. These vacuum porcelain furnaces all use electric heating wires for heating to fire dental porcelain. Since the electric heating wires need to be externally connected to wires to obtain electricity, during the heating process, gaps will appear at the connection parts of the electric heating wires and the wires due to thermal expansion and contraction, causing air to leak into the vacuum porcelain furnace, affecting the vacuum degree inside the vacuum porcelain furnace, and thus affecting the quality of dental porcelain firing. Another problem is that the existing connection method is relatively complex, and it is very inconvenient to replace the electric heating wire when it is damaged. Content of the Utility Model

[0004] In view of this, this application provides an electric heating wire sealing clamping device for a vacuum porcelain furnace, which can not only achieve a good sealing effect on the vacuum porcelain furnace, but also quickly replace the damaged electric heating wire, and the sealing effect is not affected after replacement.

[0005] According to one aspect of the present application, in one embodiment, there is provided an electric heating wire sealing and clamping device for a vacuum porcelain furnace, which includes an electrode bolt, a collet, a locking nut, and a sealing cap. The electrode bolt and the collet are conductive. An axial through hole with a conical step is provided in the electrode bolt along the axis of the screw. Internal threads are provided on the inner wall of the large-diameter section of the through hole. The locking nut has external threads that match the internal threads of the electrode bolt. After the collet clamps the electric heating wire, it is inserted into the inner hole of the electrode bolt. The collet is stuck at the conical step of the through hole of the electrode bolt. The locking nut is put on the collet and screwed into the internal thread hole of the electrode bolt to press the collet tightly. The sealing cap has elongation elasticity. The sealing cap is sleeved on the head of the electrode bolt to cover the collet, the locking nut, and the head of the electrode bolt.

[0006] In some embodiments, the head of the electrode bolt is a tower-shaped head, including an upper tower part, a groove part, and a lower tower part. The groove part is located between the upper tower part and the lower tower part.

[0007] In some embodiments, the groove part is an annular groove.

[0008] In some embodiments, the upper tower part has a cylindrical outer shape.

[0009] In some embodiments, at least one internal thread blind hole is provided on the lower tower part. The internal thread blind hole is perpendicular to the axis of the electrode bolt and is not communicated with the through hole.

[0010] In some embodiments, the orifice of the internal thread blind hole on the lower tower part is a flat step.

[0011] In some embodiments, the collet includes a large head and a barrel rod. The large head is connected to the barrel rod. One end of the large head away from the barrel rod is conical.

[0012] In some embodiments, grooves evenly distributed around the axis are provided on the large head of the collet. The grooves penetrate the entire large head and also extend to the barrel rod. The number of the grooves is at least three.

[0013] In some embodiments, the sealing cap is made of a high-temperature resistant flexible polymer material, such as high-temperature resistant silica gel, high-temperature resistant fluororubber, etc.

[0014] In some embodiments, an inner edge is provided at the cap opening of the sealing cap. When the sealing cap is sleeved on the tower-shaped head of the electrode bolt, the inner edge is stuck in the groove part of the tower-shaped head to prevent the sealing cap from falling off.

[0015] In some embodiments, a cap ring is further included. The cap ring is sleeved on the sealing cap. When the sealing cap is sleeved on the tower-shaped head of the electrode bolt, the cap ring is located at the upper tower part.

[0016] Advantages of the utility model:

[0017] 1. For the electric heating wire sealing and clamping device for a vacuum porcelain furnace according to the above embodiment, the electric heating wire is clamped by a collet, which is convenient to replace. At the same time, a sealing cap is put on the tower-shaped head of the electrode bolt, which can achieve a good sealing effect and improve the stability and reliability of the vacuum porcelain furnace.

[0018] 2. For the electric heating wire sealing and clamping device for a vacuum porcelain furnace according to the above embodiment, a cap ring is sleeved on the sealing cap. After the sealing cap expands due to heat, it is also held by the cap ring, so that the sealing cap is always in close contact with the upper tower part of the tower-shaped head, avoiding air leakage. Description of the drawings

[0019] Figure 1 It is a three-dimensional schematic diagram of Embodiment 1;

[0020] Figure 2 It is a sectional structural schematic diagram of Embodiment 1;

[0021] Figure 3 It is a sectional structural schematic diagram of the electrode bolt;

[0022] Figure 4 It is a sectional structural schematic diagram of the collet;

[0023] Figure 5 It is a top view of the large head part of the collet;

[0024] Figure 6 It is a sectional structural schematic diagram of the locking nut;

[0025] Figure 7 It is a sectional structural schematic diagram of Embodiment 2.

[0026] In the figure: 1. Electrode bolt; 11. Tower-shaped head; 111. Upper tower part; 112. Lower tower part; 113. Groove part; 114. Internal thread blind hole; 115. Plane step; 12. Through hole; 13. Conical step; 14. Internal thread; 2. Collet; 21. Large head part; 22. Collet rod; 23. Groove; 3. Locking nut; 4. Sealing cap; 5. Cap ring; 6. Electric heating wire. Detailed implementation manners

[0027] The present application will be further described in detail below in conjunction with the accompanying drawings through specific embodiments. Similar elements in different embodiments are labeled with related similar element numbers. In the following embodiments, many detailed descriptions are provided to enable a better understanding of the present application. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification, which is to avoid the core part of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the descriptions in the specification and the general technical knowledge in the art.

[0028] In addition, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operation steps involved in each embodiment can also be reordered or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and the drawings are only for clearly describing a certain embodiment, and do not mean that they are essential components and / or sequences.

[0029] The serial numbers assigned to the components in this article, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in the present application, unless otherwise specified, both include direct and indirect connections (couplings).

[0030] Embodiment 1:

[0031] Please refer to Figures 1-6 , according to one aspect of the present application, in one embodiment, a sealing clamping device for an electric heating wire of a vacuum porcelain furnace is provided, including an electrode bolt 1, a collet 2, a locking nut 3, and a sealing cap 4. The electrode bolt 1 and the collet 2 are conductive, and their material is copper. The material of the locking nut 3 is stainless steel, and the sealing cap 4 has elongation elasticity, and its material is high-temperature resistant silicone.

[0032] A through hole 12 with a conical step 13 is axially provided in the electrode bolt 1 along the screw rod, and an internal thread 14 is provided on the inner wall of the large-diameter section of the through hole 12. The head of the electrode bolt 1 is a tower-shaped head 11, including an upper tower part 111, a groove part 113 and a lower tower part 112. The upper tower part 111 has a cylindrical outer shape, and the groove part 113 is an annular groove; the groove part 113 is located between the upper tower part 111 and the lower tower part 112; two internal thread blind holes 114 are provided on the lower tower part 112, the internal thread blind holes 114 are perpendicular to the axis of the electrode bolt 1, the internal thread blind holes 114 are not communicated with the through hole 12, and the two internal thread blind holes 114 are arranged oppositely; the orifice of the internal thread blind hole 114 in the lower tower part 113 is a flat step 115.

[0033] The collet 2 includes a large head 21 and a collet rod 22. The large head 21 is connected to the collet rod 22, and one end of the large head 21 away from the collet rod 22 is conical. Grooves 23 are uniformly distributed around the axis on the large head 21 of the collet 2. The grooves 23 penetrate the entire large head 21, and the grooves 23 also extend to the collet rod 22. The number of the grooves 23 is four and they are arranged in a cross.

[0034] The lock nut 3 has an external thread that matches the internal thread 14 of the electrode bolt 1, and the lock nut 3 has a central hole.

[0035] After the collet 2 clamps the heating wire 6, it is inserted into the through hole 12 of the electrode bolt 1. The collet 2 is stuck at the conical step 13 of the through hole 12 of the electrode bolt 1. The lock nut 3 is put on the collet 2 and screwed into the internal thread 14 of the through hole 12 of the electrode bolt 1 to press the collet 2 tightly.

[0036] The sealing cap sleeve 4 is put on the tower-shaped head 11 of the electrode bolt 1 to cover the collet 2, the lock nut 3 and the tower-shaped head 11 of the electrode bolt 1. An inner edge is provided at the cap opening of the sealing cap 4. After the sealing cap 4 is put on the tower-shaped head 11 of the electrode bolt 1, the inner edge is stuck in the groove part 113 of the tower-shaped head 11 to prevent the sealing cap 4 from falling off.

[0037] Embodiment Two:

[0038] Please refer to Figure 7 , this embodiment is improved on the basis of Embodiment One by adding a cap ring 5. The cap ring 5 is made of copper and is a copper ring. The inner diameter is slightly smaller than the outer diameter of the sealing cap 4. After being put on the sealing cap 4, it can play a role in clamping the sealing cap 4.

[0039] After the sealing cap 4 is put on the tower-shaped head 11 of the electrode bolt 1, the cap ring 5 is located at the upper tower part 111.

[0040] The above uses specific examples to elaborate on the present utility model, which is only used to help understand the present utility model and is not intended to limit the present utility model. For those skilled in the technical field to which the present utility model pertains, based on the idea of the present utility model, several simple deductions, deformations or substitutions can also be made.

Claims

1. A heating wire sealing and clamping device for a vacuum porcelain furnace, characterized in that: It includes an electrode bolt, a collet, a locking nut and a sealing cap. The electrode bolt and the collet are conductive. A through hole with a conical step is arranged along the axial direction of the screw rod in the electrode bolt. An internal thread is arranged on the inner wall of the large diameter section of the through hole. The locking nut has an external thread matching the internal thread of the electrode bolt. After the collet clamps the heating wire, it is inserted into the inner hole of the electrode bolt. The collet is stuck at the conical step of the through hole of the electrode bolt. The locking nut is passed on the collet and screwed into the internal thread hole of the electrode bolt to tighten the collet. The sealing cap has elongation elasticity and is sleeved on the head of the electrode bolt.

2. The electric heating wire sealing and clamping device for a vacuum porcelain furnace according to claim 1, characterized in that: The head of the electrode bolt is a tower-shaped head, comprising an upper tower portion, a groove portion and a lower tower portion, wherein the groove portion is located between the upper tower portion and the lower tower portion.

3. The electric heating wire sealing and clamping device for a vacuum porcelain furnace according to claim 2, characterized in that: The groove portion is an annular groove.

4. The electric heating wire sealing and clamping device for a vacuum porcelain furnace according to claim 2, characterized in that: The upper tower portion has a cylindrical shape.

5. The electric heating wire sealing and clamping device for a vacuum porcelain furnace according to claim 2, characterized in that: The lower tower portion is provided with at least one internally threaded blind hole, the internally threaded blind hole is perpendicular to the axis of the electrode bolt, the internally threaded blind hole is not connected to the through hole, and the opening of the internally threaded blind hole of the lower tower portion is a plane step.

6. The electric heating wire sealing and clamping device for a vacuum porcelain furnace according to claim 1, characterized in that: The collet comprises a large head and a barrel rod, wherein the large head is connected to the barrel rod, and an end of the large head away from the barrel rod is conical.

7. The electric heating wire sealing and clamping device for a vacuum porcelain furnace according to claim 6, characterized in that: The large head of the collet is provided with grooves evenly distributed from the axis to the surroundings, the grooves run through the entire large head, the grooves also extend to the collet rod, and the number of the grooves is at least three.

8. The electric heating wire sealing and clamping device for a vacuum porcelain furnace according to claim 1, characterized in that: The sealing cap is made of high temperature resistant flexible polymer material.

9. The electric heating wire sealing and clamping device for a vacuum porcelain furnace according to claim 8, characterized in that: The cap opening of the sealing cap is provided with an inner edge.

10. The electric heating wire sealing and clamping device for a vacuum porcelain furnace according to claim 1, characterized in that: Also included is a cap ring, which is sleeved on the sealing cap.

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