Thermocouple fixing device for vacuum furnace

Abstract

The utility model relates to the technical field of vacuum furnace temperature measuring equipment, in particular to a thermocouple fixing device for a vacuum furnace, and solves the problem that the end part is difficult to be accurately butted with a temperature measuring interface of the vacuum furnace due to the fact that a thermocouple is easy to shake and shift in the installation process in the prior art. The device comprises a mounting plate, a sealing pipe and a sealing sleeve which is detachably connected, a fixing piece, an end connecting plate and a guide structure in which a guide rod is matched with a guide hole are arranged in the sealing sleeve, and the guide rod is in sliding fit with the guide hole, so that the thermocouple has good guidance quality and stability in the mounting process; the end part can be accurately butted with the temperature measurement interface; and meanwhile, a pressing plate, a fixing ring, a sealing ring, a vacuum pump, a pressure release valve and other structures are arranged, so that the sealing performance, safety and operation convenience of the device are further improved. According to the utility model, the thermocouple installation stability and positioning accuracy are effectively improved, the temperature measurement precision and the system reliability are improved, and the device is suitable for high-precision vacuum heating process occasions.

Description

Technical Field

[0001] This utility model relates to the technical field of vacuum furnace temperature measurement equipment, and in particular to a thermocouple fixing device for a vacuum furnace. Background Technology

[0002] A vacuum furnace is a device that heats materials in a vacuum environment, widely used in metal heat treatment, semiconductor manufacturing, ceramic sintering, and other fields. Because it can achieve high-precision temperature control in an oxygen-free, low-pressure environment, it plays a crucial role in ensuring product quality and improving material properties. During the operation of a vacuum furnace, real-time temperature monitoring is a key aspect of ensuring process stability and product yield. Thermocouples, as the core temperature sensing element, directly affect the temperature measurement accuracy and safety of the entire system due to their installation stability and sealing.

[0003] Existing thermocouple fixing devices face problems such as unstable guidance, inaccurate positioning, and low installation efficiency in practical applications. For example, the published utility model patent CN 207317954 U proposes a thermocouple protection device for a vacuum furnace. This device, through the setting of a sealing sleeve, connecting parts, and sealing tube, improves the sealing reliability during thermocouple installation to a certain extent and has a certain anti-explosion protection function. However, this device still has significant shortcomings: its sealing sleeve does not have an effective guiding and moving structure. During the insertion or adjustment of the thermocouple position, it is prone to shaking or displacement, making it difficult for the thermocouple end to accurately align with the temperature measuring interface of the vacuum furnace. This not only reduces the stability and accuracy of installation but may also cause thermocouple damage or seal failure due to repeated adjustments.

[0004] Therefore, to address the shortcomings of existing technologies, we urgently need a thermocouple fixing device for vacuum furnaces. This device should effectively improve the guiding stability and docking accuracy during thermocouple installation while ensuring sealing reliability. Simultaneously, it should significantly improve operational efficiency and applicability, better meeting the practical needs of modern high-precision temperature measurement and sealing requirements, and providing strong support for the high-quality development of the vacuum furnace industry. Utility Model Content

[0005] The purpose of this invention is to provide a thermocouple fixing device for a vacuum furnace, which solves the problem in the prior art where the sealing sleeve does not have an effective guiding and moving structure, making it easy for the thermocouple to shake or shift during insertion or adjustment, resulting in the thermocouple end being difficult to accurately connect to the temperature measuring interface of the vacuum furnace.

[0006] To achieve the above objectives, this utility model provides a thermocouple fixing device for a vacuum furnace, including a mounting plate, a sealing tube connected to one side of the mounting plate, and a sealing sleeve detachably connected to the other side of the mounting plate.

[0007] A fixing member is connected to one side of the inner wall of the sealing sleeve, one end of the sealing tube is connected to one side of the fixing member, and a pressure plate is detachably connected to one end of the sealing sleeve.

[0008] The sealing tube is equipped with a thermocouple, and the sealing sleeve is equipped with an end connecting plate that is connected to the end of the thermocouple. The end connecting plate is connected to the fixing component.

[0009] Several guide holes are provided on one side edge of the end connecting plate, and a guide rod with one end connected to the inner wall of the sealing sleeve is slidably connected inside the guide holes.

[0010] The sealing sleeve has a fixing ring fixedly connected to one end edge, which is fixedly connected to the side wall bolt of the mounting plate.

[0011] The sealing sleeve is connected to a vacuum pump on one side of its bottom and a pressure relief valve on the other side of its bottom.

[0012] A sealing ring is fixedly connected to one side of the mounting plate, and the side wall of the fixing ring is in contact with the sealing ring.

[0013] The sealing sleeve has a positioning ring on one side of its inner wall. The positioning ring is connected to the inner wall of the sealing sleeve through several positioning plates. One end of each guide rod is fixedly connected to the side wall of the positioning ring.

[0014] The clamping plate has several positioning screws on one side, one end of which is threaded through the clamping plate, and one end of the positioning screw is connected to the side wall of the fixing ring.

[0015] This utility model discloses a thermocouple fixing device for a vacuum furnace. By setting a guiding structure composed of a guide rod and a guide hole, it significantly improves the stability and straightness of the thermocouple during insertion and movement, avoids installation difficulties and sealing failures caused by thermocouple misalignment, and solves the technical problems of unstable guidance and inaccurate positioning in existing devices. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0018] Figure 2 This is a structural schematic diagram of the pressing plate and sealing sleeve according to an embodiment of the present utility model.

[0019] Figure 3This is a schematic diagram of the end connecting plate and guide hole of an embodiment of the present utility model.

[0020] Figure 4 This is a schematic diagram of the positioning ring and positioning plate according to an embodiment of the present invention.

[0021] Figure 5 This is a structural schematic diagram of the sealing sleeve and fixing ring according to an embodiment of the present invention.

[0022] In the diagram: 1. Pressing plate; 2. Sealing sleeve; 3. Mounting plate; 4. Sealing tube; 5. Thermocouple; 6. Positioning screw; 7. Guide rod; 8. End connecting plate; 9. Guide hole; 10. Positioning ring; 11. Positioning plate; 12. Pressure relief valve; 13. Fixing ring; 14. Vacuum pump; 15. Fixing component; 16. Sealing ring. Detailed Implementation

[0023] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0024] Example 1

[0025] Please see Figure 1-5 As shown, a thermocouple fixing device for a vacuum furnace according to this embodiment includes a mounting plate 3, a sealing tube 4 connected to one side of the mounting plate 3, and a sealing sleeve 2 detachably connected to the other side of the mounting plate 3.

[0026] A fixing member 15 is connected to one side of the inner wall of the sealing sleeve 2, one end of the sealing tube 4 is connected to one side of the fixing member 15, and a pressure plate 1 is detachably connected to one end of the sealing sleeve 2.

[0027] Thermocouple 5 is installed inside the sealing tube 4, and end connecting plate 8 connected to the end of thermocouple 5 is installed inside the sealing sleeve 2. End connecting plate 8 is connected to the fixing member 15.

[0028] Several guide holes 9 are provided on one side edge of the end connecting plate 8, and a guide rod 7 with one end connected to the inner wall of the sealing sleeve 2 is slidably connected inside the guide hole 9.

[0029] First, the mounting plate 3 is fixedly connected to the temperature measurement interface of the vacuum furnace. Then, one end of the sealing tube 4 is connected to the fixing member 15, which is fixed to one side of the inner wall of the sealing sleeve 2. The sealing tube 4 is used to pass through and guide the thermocouple 5 into the vacuum furnace for temperature measurement. The other end of the sealing sleeve 2 is detachably connected through the clamping plate 1, which facilitates maintenance or replacement of the internal structure. After the thermocouple 5 is inserted into the sealing tube 4, its end extends into the interior of the sealing sleeve 2 and is connected to the end connecting plate 8. The end connecting plate 8 is further connected to the fixing member 15 to ensure the stability and thermal conductivity of the overall structure. To solve the problems of unstable guidance and inaccurate positioning in the prior art, a side of the end connecting plate 8 is... Several guide holes 9 are provided at the edge, and guide rods 7 are slidably connected in the guide holes 9. One end of the guide rod 7 is fixedly connected to the inner wall of the sealing sleeve 2. When the thermocouple 5 is installed and connected, it first aligns with the guide rod 7 through the guide holes 9 of the end connecting plate 8. The end connecting plate 8 slides horizontally on the guide rod 7, so that the thermocouple 5 aligns with the sealing tube 4 until the end connecting plate 8 contacts and connects with the fixing member 15, which plays a limiting and guiding role, effectively preventing the thermocouple 5 from shaking or shifting during installation, thereby improving its stability during installation and movement. At the same time, this guiding structure also helps to accurately align the end of the thermocouple 5 with the temperature measuring interface of the vacuum furnace, improving installation efficiency and accuracy.

[0030] Example 2

[0031] Please see Figure 1-5 As shown in this embodiment, a thermocouple fixing device for a vacuum furnace has a fixing ring 13 fixedly connected to one end edge of the sealing sleeve 2 and bolted to the side wall of the mounting plate 3. Specifically, the fixing ring 13 is fixedly connected to one end edge of the sealing sleeve 2 and bolted to the side wall of the mounting plate 3. During device installation, the fixing ring 13 is tightly connected to the mounting plate 3 by bolts. This design not only enhances the connection strength between the sealing sleeve 2 and the mounting plate 3, but also further improves the sealing performance and structural stability of the entire device, effectively preventing loosening caused by vibration or temperature changes.

[0032] A sealing ring 16 is fixedly connected to one side of the mounting plate 3, and the side wall of the fixing ring 13 fits against the sealing ring 16. Specifically, by fixing the sealing ring 16 to one side of the mounting plate 3 and fitting the side wall of the fixing ring 13 against the sealing ring 16, the cooperation between the sealing ring 16 and the fixing ring 13 during the assembly of the device can further improve the sealing effect between the mounting plate 3 and the sealing sleeve 2, preventing external air or other impurities from entering the vacuum furnace, thereby ensuring the temperature measurement accuracy and long-term stable operation of the system.

[0033] A plurality of positioning screws 6, each threaded through one end of the clamping plate 1, are provided on one side of the clamping plate 1. One end of each positioning screw 6 is connected to the side wall of the fixing ring 13. Specifically, by providing a plurality of positioning screws 6 with one threaded end through the clamping plate 1 and connected to the side wall of the fixing ring 13, when it is necessary to inspect or replace the internal components of the sealing sleeve 2, the clamping plate 1 can be easily removed simply by loosening the positioning screws 6, simplifying the maintenance process. At the same time, the presence of the positioning screws 6 also provides additional fixing force to the clamping plate 1, ensuring the airtightness and safety of the sealing sleeve 2 in the working state and reducing the risk of leakage. This design greatly improves the ease of operation and maintenance efficiency of the device, reduces downtime, and helps to maintain the continuity of production.

[0034] Example 3

[0035] Please see Figure 1-5 As shown in this embodiment, a thermocouple fixing device for a vacuum furnace has a vacuum pump 14 connected to one side of the bottom of the sealing sleeve 2, and a pressure relief valve 12 connected to the other side. Specifically, by connecting the vacuum pump 14 to one side of the bottom of the sealing sleeve 2 and the pressure relief valve 12 to the other side, when it is necessary to perform a vacuuming operation inside the sealing sleeve 2 to enhance the sealing performance, this can be achieved through the vacuum pump 14; and when it is necessary to quickly restore the pressure to normal for disassembly and maintenance, this can be achieved by operating the pressure relief valve 12. This design ensures that the internal environment of the sealing sleeve 2 can be flexibly adjusted according to actual needs, improving the safety and ease of operation of the equipment.

[0036] A positioning ring 10 is provided on one side of the inner wall of the sealing sleeve 2. The positioning ring 10 is connected to the inner wall of the sealing sleeve 2 through several positioning plates 11. One end of each guide rod 7 is fixedly connected to the side wall of the positioning ring 10. Specifically, the positioning ring 10 is provided on one side of the inner wall of the sealing sleeve 2. The positioning ring 10 is connected to the inner wall of the sealing sleeve 2 through several positioning plates 11. One end of each guide rod 7 is fixedly connected to the side wall of the positioning ring 10, which makes the position of the guide rod 7 more stable and less prone to displacement or deformation. This not only improves the smoothness and accuracy of sliding between the guide hole 9 and the guide rod 7, but also enhances the stability of the thermocouple 5 during movement, ensuring that its end can accurately connect to the temperature measuring interface of the vacuum furnace, and improving the overall installation efficiency and accuracy.

[0037] This solution includes the following workflow:

[0038] During the installation of thermocouple 5, the end connecting plate 8 connects with the guide rod 7 through the guide hole 9. The guide rod 7 guides the end connecting plate 8 to slide horizontally along the direction of the guide rod 7, thereby guiding the thermocouple 5 to accurately enter the sealing tube 4 and extend into the vacuum furnace until the end connecting plate 8 contacts the fixing member 15 and completes the connection. This effectively prevents the thermocouple 5 from shaking or shifting during the movement, and improves the stability and accuracy of the installation process.

[0039] To further enhance the overall performance of the device, a retaining ring 13 is fixedly connected to one edge of the sealing sleeve 2. This retaining ring 13 is connected to the side wall of the mounting plate 3 by bolts, making the connection between the sealing sleeve 2 and the mounting plate 3 more secure and reliable, enhancing structural strength and sealing performance, and preventing loosening caused by external vibration or temperature changes. Furthermore, a vacuum pump 14 is located on one side of the bottom of the sealing sleeve 2, and a pressure relief valve 12 is located on the other side. When improved sealing performance is required, the vacuum pump 14 can be used to evacuate the inside of the sealing sleeve 2. When maintenance or component replacement is needed, the pressure can be quickly released through the pressure relief valve 12, improving operational safety and convenience.

[0040] To further enhance the sealing effect, a sealing ring 16 is provided on one side of the mounting plate 3. The side wall of the fixing ring 13 fits against the sealing ring 16. The two work together to form an additional sealing barrier, effectively preventing outside air or impurities from entering the vacuum furnace, ensuring the purity of the temperature measurement environment and the long-term stable operation of the system. A positioning ring 10 is also provided on one side of the inner wall of the sealing sleeve 2. The positioning ring 10 is connected to the inner wall of the sealing sleeve 2 through several positioning plates 11. One end of each guide rod 7 is fixedly connected to the side wall of the positioning ring 10. This structural design makes the position of the guide rod 7 more stable and less prone to displacement or deformation, thereby ensuring the smoothness and accuracy of the sliding between the guide hole 9 and the guide rod 7. This further improves the stability of the thermocouple 5 during movement and ensures that its end can accurately connect to the temperature measurement interface of the vacuum furnace, significantly improving installation efficiency and accuracy.

[0041] Finally, several positioning screws 6 are provided on one side of the clamping plate 1. One end of the positioning screw 6 passes through the clamping plate 1 and is connected to the side wall of the fixing ring 13 by threads. When it is necessary to inspect, clean or replace the internal components of the sealing sleeve 2, the clamping plate 1 can be quickly disassembled simply by loosening the positioning screw 6, which simplifies the maintenance process. At the same time, the positioning screw 6 also provides additional fixing force for the clamping plate 1, which enhances the airtightness and safety of the entire device in the working state, reduces the risk of leakage, greatly improves the ease of operation and maintenance efficiency of the equipment, reduces unnecessary downtime, and helps to maintain the continuity and stability of production.

[0042] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A thermocouple fixing device for a vacuum furnace, characterized in that, include: Mounting plate, sealing tube connected to one side of mounting plate, and sealing sleeve detachably connected to the other side of mounting plate; A fixing member is connected to one side of the inner wall of the sealing sleeve, one end of the sealing tube is connected to one side of the fixing member, and a pressure plate is detachably connected to one end of the sealing sleeve. The sealing tube is equipped with a thermocouple, and the sealing sleeve is equipped with an end connecting plate that is connected to the end of the thermocouple. The end connecting plate is connected to the fixing component. Several guide holes are provided on one side edge of the end connecting plate, and a guide rod with one end connected to the inner wall of the sealing sleeve is slidably connected inside the guide holes.

2. The thermocouple fixing device for a vacuum furnace according to claim 1, characterized in that, A fixing ring is fixedly connected to one end edge of the sealing sleeve and is fixedly connected to the side wall bolt of the mounting plate.

3. The thermocouple fixing device for a vacuum furnace according to claim 1, characterized in that, A vacuum pump is connected to one side of the bottom of the sealing sleeve, and a pressure relief valve is connected to the other side of the bottom.

4. The thermocouple fixing device for a vacuum furnace according to claim 2, characterized in that, A sealing ring is fixedly connected to one side of the mounting plate, and the side wall of the fixing ring is in contact with the sealing ring.

5. A thermocouple fixing device for a vacuum furnace according to claim 3, characterized in that, A positioning ring is provided on one side of the inner wall of the sealing sleeve. The positioning ring is connected to the inner wall of the sealing sleeve through a number of positioning plates. One end of each guide rod is fixedly connected to the side wall of the positioning ring.

6. A thermocouple fixing device for a vacuum furnace according to claim 4, characterized in that, A plurality of positioning screws with one end threaded through the pressure plate are provided on one side of the pressure plate, and one end of the positioning screws is connected to the side wall of the fixing ring.

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