Thermocouple sealing device
Through the design of the thermocouple sealing device, the high maintenance costs and long-term problems caused by thermocouple welding are solved, and multi-point temperature measurement and removable replacement are achieved in high vacuum environments, reducing maintenance costs and time.
Patent Information
- Application Number
- CN202422492773.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-10-15
AI Technical Summary
In the prior art, when the thermocouple is measured in a multi-point temperature under a high vacuum state, the thermocouple welding causes high maintenance costs and long cycles, and it is impossible to replace abnormal thermocouples separately.
The thermocouple sealing device is adopted, including thermocouple seals and fixtures, and the O-ring design is used in the tapered holes and rectangular grooves, combined with the T-clips and screws to achieve the removable connection of the thermocouple to ensure sealing and maintainability.
While multi-point temperature measurement in a high vacuum environment, the replacement of abnormal thermocouples alone does not affect the use of other thermocouples, reducing maintenance costs and time, simple structure and easy processing and maintenance.
Smart Images
Figure CN223166239U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vacuum sealing, in particular to a thermocouple sealing device. Background Art
[0002] Some equipment needs to measure the temperature at multiple points of a certain part inside the equipment in a high-vacuum state. For example, in an eutectic furnace equipment, it needs to externally connect multiple temperature-measuring thermocouples. In order to seal the multiple thermocouples and due to insufficient installation space for the thermocouples, usually two or more thermocouples are welded to the same thermocouple seal. Although this sealing method can achieve high-vacuum sealing of the thermocouples, when one of the thermocouples malfunctions and needs to be replaced, the other thermocouples, which are welded to the same thermocouple seal and cannot be disassembled and used for the second time, require the entire part to be replaced and welded again. This maintenance method causes waste to the normally working thermocouples, resulting in high maintenance costs and long cycles. Summary of the Utility Model
[0003] In view of the deficiencies in the above problems, the utility model provides a thermocouple sealing device.
[0004] To achieve the above object, the utility model provides a thermocouple sealing device, including a thermocouple seal connected to a sealed cavity model and a fixture for fixing the thermocouple seal;
[0005] Wherein, a tapered hole for the temperature-measuring thermocouple to pass through is provided on the thermocouple seal, a rectangular groove is opened on the surface of the thermocouple seal that contacts the sealed cavity model, a type-II O-ring is provided in the rectangular groove, and a type-I O-ring is provided at the tapered end of the tapered hole.
[0006] Preferably, the fixture includes a T-shaped upper fixture and a T-shaped lower fixture with the same shape. A semi-circular upper through-hole is provided below the T-shaped upper fixture, and a semi-circular lower through-hole is provided at the corresponding position of the T-shaped lower fixture. The semi-circular upper through-hole and the semi-circular lower through-hole form a circular hole for the temperature-measuring thermocouple to pass through.
[0007] Preferably, an upper connection hole is provided on the T-shaped upper fixture, and a lower connection hole is provided on the T-shaped lower fixture.
[0008] Preferably, a countersunk hole is provided in the vertical direction of the T-shaped upper fixture, and a threaded hole is provided at the corresponding position in the vertical direction of the T-shaped lower fixture.
[0009] Preferably, the temperature-measuring lead of the temperature-measuring thermocouple passes through the tapered hole, and the type-I O-ring is provided at the planar sealing end of the temperature-measuring thermocouple.
[0010] Preferably, a plurality of connection through-holes are provided on the thermocouple seal.
[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0012] The present utility model can be adapted to measure the temperature at multiple points of the internal parts of some equipment under the working state of high vacuum, such as eutectic furnace equipment. Currently, the described thermocouple sealing device takes two temperature-measuring thermocouples as a group. When more than two temperature-measuring thermocouples are required as a group, its size needs to be increased, and the sealing structure and principle remain unchanged. If one of the thermocouples malfunctions, only the abnormal thermocouple needs to be replaced, and the remaining thermocouples can still be used normally in this device. The structure of this device is simple, the processing and maintenance are simple, and the cost is lower than that of the welding method. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a three-dimensional structure diagram of a thermocouple sealing device;
[0014] Figure 2 is a cross-sectional view of a thermocouple sealing device;
[0015] Figure 3 is a front view of a T-shaped upper fixture;
[0016] Figure 4 is a top view of a T-shaped upper fixture;
[0017] Figure 5 is a front view of a T-shaped lower fixture;
[0018] Figure 6 is a top view of a T-shaped lower fixture;
[0019] Figure 7 is a three-dimensional view of a cross-shaped fixture assembly;
[0020] Figure 8 is a front view of a cross-shaped fixture assembly;
[0021] Figure 9 is a front view of a thermocouple seal;
[0022] Figure 10 is a rear view of a thermocouple seal;
[0023] Figure 11 is a cross-sectional view of a thermocouple;
[0024] Figure 12 is a front view of a temperature-measuring thermocouple. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0027] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" 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 a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0028] The following further describes the present utility model in detail with reference to the Figures 1-12 accompanying drawings:
[0029] Referring to Figure 1 , the present utility model provides a thermocouple sealing device, including a thermocouple seal connected to a sealed cavity model and a fixture for fixing the thermocouple seal;
[0030] Referring to Figure 2 , a tapered hole through which a temperature-measuring thermocouple passes is provided on the thermocouple seal. A rectangular groove is provided on the surface thereof in contact with the sealed cavity model. A type-II O-ring is provided in the rectangular groove, and a type-I O-ring is provided at the tapered end of the tapered hole.
[0031] Referring to Figures 3-4, the fixture includes a T-shaped upper fixture and a T-shaped lower fixture with the same shape. The T-shaped upper fixture is a T-shaped member. In the horizontal part of the front view of the T-shaped upper fixture 1, there are two upper semi-circular through holes 11 at its central position, and in the vertical part, there is an upper connecting hole 12 for fixing the T-shaped upper fixture. In the top view of the T-shaped upper fixture, countersunk through holes 13 are provided at both horizontal ends. In order to fix two temperature measuring thermocouples, the part that needs to cooperate with the T-shaped upper fixture is the T-shaped lower fixture 2.
[0032] Referring to Figures 5-6, for the T-shaped lower fixture 2, there are two lower semi-circular through holes 21 at the central position of its horizontal part. The positions of the two lower semi-circular through holes 21 correspond to the two semi-circular through holes 11 of the T-shaped upper fixture. In the vertical part, there is a lower connecting hole 22 for fixing the T-shaped lower fixture. In the top view of the T-shaped lower fixture 2, threaded holes 23 are provided at both horizontal ends, and their positions correspond to the countersunk through holes 13 of the T-shaped upper fixture. The T-shaped upper fixture and the T-shaped lower fixture are connected with screws through the countersunk through holes 13 of the T-shaped upper fixture and the threaded holes 23 of the T-shaped lower fixture to form a cross-shaped fixture assembly 3, as Figure 7 and Figure 8 shown. In the front view of the cross-shaped fixture assembly 3, two round holes 31 are formed at the central position by the two semi-circular through holes of the T-shaped upper fixture and the T-shaped lower fixture. Two temperature measuring thermocouples 5 pass through the round holes 31 and are tightened by the screws installed in the two countersunk holes 13 of the T-shaped upper fixture 1, so that the temperature measuring thermocouples 5 are fixed in the cross-shaped fixture assembly 3.
[0033] Referring to Figure 12 , install the type-I O-ring 6 at the plane-sealed end 51 of the temperature measuring thermocouple 5, then pass the temperature measuring leads of the two thermocouples through the corresponding holes of the thermocouple seal, and then fix the T-shaped upper fixture 1 and the T-shaped lower fixture 2 on the thermocouple seal 4 with screws. At this time, the sealing and fixing of the thermocouple 5 are completed. Then install the type-II O-ring 7 in the rectangular groove of the thermocouple seal 4, and finally install the whole device on the surface of the sealed cavity, and the whole thermocouple sealing device is completed with fixing and sealing assembly.
[0034] Specifically, the type-I O-ring 6 is installed in the temperature measuring thermocouple 5 fixed by the cross-shaped fixture assembly 3, and its installation position is the plane-sealed end 51 of the temperature measuring thermocouple.
[0035] Referring to Figures 9-10, one side of the thermocouple seal 4 is the mounting surface of the cross clamp assembly 3. According to the size of the type-I O-ring 6 and referring to the vacuum design manual, a tapered hole 41 is provided at the middle position of this surface. The position of the tapered hole 41 corresponds to the two circular through-holes I 31 of the cross clamp assembly 3. The tapered hole 41 is characterized in that its diameter decreases from the outside to the inside. According to this feature, when the cross clamp assembly 3 is installed, the type-I O-ring 6 is squeezed, which can enhance the sealing performance of the temperature-measuring thermocouple 5. After the cross clamp assembly 3 is installed, a rectangular groove 43 is provided on the other side corresponding to its mounting surface. This feature is sealed according to the size of the type-II O-ring 7 and referring to the vacuum design manual. Circular through-holes II 42 are provided at the four corners of the thermocouple seal. Four threaded holes are provided in the corresponding sealing cavity at its position. Finally, the type-II O-ring 7 is installed in the rectangular groove 43, and the screws pass through the four circular through-holes II 42 of the thermocouple seal 4 to complete the fixation of the entire device.
[0036] In this embodiment, the type-II O-ring and the type-I O-ring are O-rings of different models.
[0037] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various changes and modifications can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A thermocouple sealing device, characterized in that, It includes a thermocouple seal connected to the sealed cavity model and a fixture for fixing the thermocouple seal; Among them, a tapered hole through which a temperature-measuring thermocouple passes is provided on the thermocouple seal. A rectangular groove is opened on the surface thereof in contact with the sealed cavity model. A type-II O-ring is provided in the rectangular groove, and a type-I O-ring is provided at the tapered end of the tapered hole.
2. The thermocouple sealing device according to claim 1, wherein, The fixture includes a T-shaped upper fixture and a T-shaped lower fixture with the same shape. An upper semi-circular through-hole is provided below the T-shaped upper fixture, and a lower semi-circular through-hole is provided at the corresponding position of the T-shaped lower fixture. The upper semi-circular through-hole and the lower semi-circular through-hole form a circular hole for the temperature-measuring thermocouple to pass through.
3. The thermocouple sealing device according to claim 2, characterized in that, An upper connection hole is provided on the T-shaped upper fixture, and a lower connection hole is provided on the T-shaped lower fixture.
4. The thermocouple sealing device according to claim 3, wherein, A countersunk hole is provided in the vertical direction of the T-shaped upper fixture, and a threaded hole is provided at the corresponding position in the vertical direction of the T-shaped lower fixture.
5. The thermocouple sealing device according to claim 4, wherein, The temperature-measuring lead of the temperature-measuring thermocouple passes through the tapered hole, and the type-I O-ring is provided at the planar sealing end of the temperature-measuring thermocouple.
6. The thermocouple sealing device according to claim 5, characterized in that, A plurality of connection through-holes are provided on the thermocouple seal.