A thermocouple calibrating furnace hole cleaning tool

Abstract

The utility model discloses a kind of cleaning tools of thermocouple verification furnace hole, it is related to thermocouple verification furnace maintenance technical field, comprising: outer sleeve rod, inner rod, handle part and cleaning head, movable handle is connected movably with outer sleeve rod or fixed handle by push-pull or rotating mode, and movable handle is drivingly connected with inner rod;Cleaning head includes upper support round sleeve, lower support round sleeve, at least two arc-shaped wiper blades, multiple first connecting rods and multiple second connecting rods, arc-shaped wiper blade, first connecting rod, upper support round sleeve, lower support round sleeve and second connecting rod jointly constitute four-bar linkage mechanism, to make arc-shaped wiper blade move in the process that lower support round sleeve is close to or away from upper support round sleeve towards the axis direction of outer sleeve rod away or close, simple structure, convenient to use, effectively improve cleaning efficiency and cleaning effect.

Description

Technical Field

[0001] This utility model relates to the field of thermocouple calibration furnace maintenance technology, and in particular to a cleaning tool for the holes of a thermocouple calibration furnace. Background Technology

[0002] As a key piece of equipment for calibrating and testing thermocouple performance, the thermocouple calibration furnace faces numerous problems in practical use. Due to its high-temperature environment and the presence of volatile substances during operation, oil, dust, and other impurities gradually accumulate on the inner walls of the calibration orifice. This buildup severely impacts the furnace's normal operation, affecting both its heat transfer efficiency and, more importantly, reducing the thermocouple's measurement accuracy. This, in turn, poses potential risks to the accuracy of scientific experiments and production quality control.

[0003] Existing calibration furnaces typically have long, narrow calibration holes with small diameters, making cleaning with traditional tools (such as brushes and cloths) extremely difficult. Traditional tools not only struggle to reach deep into the holes for effective cleaning, but also easily scratch or even damage the hole walls during the process. Furthermore, different sizes of thermocouple calibration furnaces have varying hole diameters, and ordinary cleaning tools cannot meet the cleaning needs of multiple hole sizes, further increasing the difficulty of cleaning. Therefore, developing a dedicated cleaning tool for thermocouple calibration furnace calibration holes is urgently needed. This tool must possess an ingenious structure, be easy to operate, provide excellent cleaning results, and not damage the furnace hole walls. Utility Model Content

[0004] The purpose of this invention is to provide a cleaning tool for thermocouple calibration furnace holes to solve the problems existing in the prior art. It has a simple structure, is easy to use, and effectively improves cleaning efficiency and cleaning effect.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides a cleaning tool for thermocouple calibration furnace holes, comprising: an outer sleeve rod, an inner rod, a handle, and a cleaning head. The inner rod is axially movable and accommodated within the outer sleeve rod. The handle includes a fixed handle and a movable handle. The fixed handle is fixedly connected to one end of the outer sleeve rod, and the movable handle is movably connected to the outer sleeve rod or the fixed handle by pushing, pulling, or rotating. The movable handle is also drively connected to the inner rod to drive the inner rod to move within the outer sleeve rod. The cleaning head includes an upper supporting cylindrical sleeve, a lower supporting cylindrical sleeve, at least two arc-shaped wiping pads, multiple first connecting rods, and multiple second connecting rods. The upper supporting cylindrical sleeve is fixedly connected to the end of the outer sleeve rod away from the fixed handle, and the lower supporting cylindrical sleeve is located away from the inner rod. The movable handle is fixedly connected to one end of the outer sleeve rod, so that it moves closer to or away from the upper support sleeve under the action of the inner rod. The arc-shaped wiping pad is radially distributed around the axis of the outer sleeve rod. One end of the first connecting rod is hinged to the arc-shaped wiping pad, and the other end is hinged to the upper support sleeve. One end of the second connecting rod is hinged to the arc-shaped wiping pad, and the other end is hinged to the lower support sleeve. Thus, the arc-shaped wiping pad, the first connecting rod, the upper support sleeve, the lower support sleeve, and the second connecting rod together form a four-bar linkage mechanism, so that the arc-shaped wiping pad moves away from or closer to the axis of the outer sleeve rod as the lower support sleeve moves closer to or away from the upper support sleeve.

[0007] Preferably, it further includes an elastic reset member, which is sleeved on the outside of the portion of the inner rod that extends out of the outer sleeve rod. One end of the elastic reset member is fixedly connected to the upper support sleeve, and the other end is fixedly connected to the lower support sleeve, so as to provide an outward pre-tightening force for the arc-shaped wiping pad.

[0008] Preferably, the elastic reset element is a spring.

[0009] Preferably, the number of the first connecting rods in the four-bar linkage is multiple and arranged in parallel.

[0010] Preferably, the curvature of the arc-shaped wiping pad is adapted to the curvature of the inner wall of the thermocouple calibration furnace hole.

[0011] Preferably, the outer surface of the arc-shaped wiping pad is provided with a layer of abrasion-resistant material or an adsorbent material.

[0012] Preferably, the number of the arc-shaped wiping pads is 3-6.

[0013] Preferably, it further includes a plurality of first connecting members and a plurality of second connecting members, wherein the first connecting rod is hingedly connected to the upper support sleeve and the arc-shaped wiping pad through the first connecting member, and the second connecting rod is hingedly connected to the lower support sleeve and the arc-shaped wiping pad through the second connecting member.

[0014] Preferably, the outer sleeve rod is provided with a sliding guide groove, and the movable handle passes through the sliding guide groove and is fixedly connected to the inner rod.

[0015] Preferably, the movable handle has an arc-shaped finger adapter groove on the side away from the fixed handle.

[0016] The present invention achieves the following technical advantages over the prior art:

[0017] The purpose of this utility model is to provide a cleaning tool for thermocouple calibration furnace holes. The inner rod is moved by the movable handle, which moves the lower support sleeve closer to or away from the upper support sleeve. The radial extension and retraction of the arc-shaped wiping blade is achieved through a four-bar linkage mechanism, which can adapt to the cleaning needs of furnace holes with different diameters and improve the versatility of the tool. The transmission design of the movable handle and the inner rod makes the operation more convenient and can effectively drive the wiping blade to fit against the inner wall of the furnace hole, thereby improving the cleaning efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the cleaning tool for the thermocouple calibration furnace bore provided by this utility model;

[0020] Figure 2 This is a front view of the arc-shaped wiping pad in the thermocouple calibration furnace hole provided by this utility model in the open state;

[0021] Figure 3 This is a front view of the arc-shaped wiping pad in the tightened state of the cleaning tool for the thermocouple calibration furnace hole provided by this utility model;

[0022] Figure 4 A cross-sectional view of the cleaning tool for the thermocouple calibration furnace bore provided by this utility model;

[0023] Figure 5 Figure 1 Enlarged view of point A in the middle;

[0024] Figure 6 Figure 1Enlarged view of point B in the middle;

[0025] Figure 7 A partial schematic diagram of the cleaning head in the tightened state of the cleaning tool for the thermocouple calibration furnace bore provided by this utility model;

[0026] In the figure: 1. Outer sleeve rod, 2. Fixed handle, 3. Movable handle, 4. Upper support sleeve, 5. First connector, 6. First locking nut, 7. First connecting rod, 8. Arc-shaped wiping plate, 9. Spring, 10. Lower support sleeve, 11. Second locking nut, 12. Inner rod, 101. Sliding guide groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] The purpose of this invention is to provide a cleaning tool for thermocouple calibration furnace holes to solve the problems existing in the prior art. It has a simple structure, is easy to use, and effectively improves cleaning efficiency and cleaning effect.

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] This utility model provides a cleaning tool for the borehole of a thermocouple calibration furnace, such as... Figures 1-7As shown, the device includes: an outer sleeve rod 1, an inner rod 12, a handle, and a cleaning head. The inner rod 12 is axially movable and accommodated within the outer sleeve rod 1. The handle includes a fixed handle 2 and a movable handle 3. The fixed handle 2 is fixedly connected to one end of the outer sleeve rod 1. The movable handle 3 is movably connected to the outer sleeve rod 1 or the fixed handle 2 by pushing, pulling, or rotating. The movable handle 3 is also connected to the inner rod 12 to drive the inner rod 12 to move within the outer sleeve rod 1. The cleaning head includes an upper supporting cylindrical sleeve 4, a lower supporting cylindrical sleeve 10, at least two arc-shaped wiping pads 8, multiple first connecting rods 7, and multiple second connecting rods. The upper supporting cylindrical sleeve 4 is fixedly connected to the end of the outer sleeve rod 1 away from the fixed handle 2. The lower supporting cylindrical sleeve 10 is fixedly connected to the end of the inner rod 12 away from the movable handle 3 and extending out of the outer sleeve rod 1, so that it moves closer to or away from the upper supporting cylindrical sleeve 4 under the action of the inner rod 12. The wiping pads 8 are radially distributed around the axis of the outer sleeve rod 1. One end of the first connecting rod 7 is hinged to the arc-shaped wiping pad 8, and the other end is hinged to the upper support sleeve 4. One end of the second connecting rod is hinged to the arc-shaped wiping pad 8, and the other end is hinged to the lower support sleeve 10. Thus, the arc-shaped wiping pad 8, the first connecting rod 7, the upper support sleeve 4, the lower support sleeve 10, and the second connecting rod together form a four-bar linkage mechanism. As the lower support sleeve 10 moves closer to or further away from the upper support sleeve 4, the arc-shaped wiping pad 8 moves away from or closer to the axis of the outer sleeve rod 1. The radial extension and retraction of the arc-shaped wiping pad 8 is achieved through the four-bar linkage mechanism, which can adapt to the cleaning needs of furnace holes with different diameters and improve the versatility of the tool. The transmission design of the movable handle 3 and the inner rod 12 makes the operation more convenient and can effectively drive the wiping pad to fit the inner wall of the furnace hole, improving the cleaning efficiency.

[0031] In a preferred embodiment, an elastic reset member is further included. The elastic reset member is sleeved on the outside of the portion of the inner rod 12 that extends out of the outer sleeve rod 1. One end of the elastic reset member is fixedly connected to the upper support sleeve 4, and the other end is fixedly connected to the lower support sleeve 10. This provides a pre-tightening force for the arc-shaped wiping pad 8 to open outward. The pre-tightening force provided by the elastic reset member ensures that the arc-shaped wiping pad 8 always maintains contact with the inner wall of the furnace hole, avoiding incomplete cleaning due to gaps. The automatic reset function simplifies the operation process, eliminating the need for manual adjustment of the wiping pad position and improving ease of use.

[0032] In a preferred embodiment, the elastic reset element is a spring 9. The spring 9, as an elastic reset element, has the characteristics of low cost, good elastic stability and strong fatigue resistance. It can maintain a reliable preload during repeated extension and contraction, thus extending the tool's service life.

[0033] In a preferred embodiment, the number of first connecting rods 7 in the four-bar linkage is multiple and arranged in parallel. The multiple parallel first connecting rods 7 can make the arc-shaped wiping pad 8 bear force evenly, avoid the skewing or jamming caused by single rod connection, ensure the synchronous movement of the wiping pad, and improve the stability and reliability of the mechanism operation.

[0034] In a preferred embodiment, the curvature of the arc-shaped wiping pad 8 is adapted to the curvature of the inner wall of the thermocouple calibration furnace hole. The adaptation of the arc-shaped wiping pad 8 to the curvature of the inner wall of the furnace hole can maximize the contact area, reduce cleaning dead corners, ensure that all parts of the inner wall of the furnace hole can be effectively wiped, and improve the cleaning effect.

[0035] In a preferred embodiment, the outer surface of the arc-shaped wiping pad 8 is provided with a wear-resistant material layer or an adsorbent material layer. The wear-resistant material layer can improve the service life of the wiping pad and adapt to the frictional environment of the inner wall of the furnace hole; the adsorbent material layer can enhance the adsorption capacity for dust and impurities, improve cleaning efficiency, and ensure the cleanliness of the furnace hole.

[0036] In a preferred embodiment, the number of arc-shaped wiping pads 8 is 3-6. The design of 3-6 wiping pads can ensure the coordination of movement between each wiping pad while covering the inner wall of the furnace hole, avoiding the problem of complex structure caused by too many wiping pads or incomplete cleaning caused by too few wiping pads.

[0037] In a preferred embodiment, the system further includes a plurality of first connecting members 5 and a plurality of second connecting members. The first connecting rod 7 is hinged to the upper supporting cylindrical sleeve 4 and the arc-shaped wiping plate 8 via the first connecting members 5. The second connecting rod is hinged to the lower supporting cylindrical sleeve 10 and the arc-shaped wiping plate 8 via the second connecting members. The hinged connection achieved through the connecting members can reduce the assembly error between the connecting rod and the supporting sleeve and the wiping plate, reduce the movement resistance, and improve the flexibility of the mechanism. The modular design facilitates component replacement and maintenance.

[0038] In a preferred embodiment, the outer sleeve rod 1 is provided with a sliding guide groove 101, and the movable handle 3 passes through the sliding guide groove 101 and is fixedly connected to the inner rod 12. The sliding guide groove 101 guides the movement of the movable handle 3, ensuring the stability of the axial movement of the inner rod 12, avoiding jamming or deviation during operation, and improving the accuracy and smoothness of tool operation.

[0039] In a preferred embodiment, the movable handle 3 is provided with an arc-shaped finger adapter groove on the side away from the fixed handle 2. The arc-shaped finger adapter groove conforms to the ergonomic design, which can increase the contact area between the hand and the handle, improve grip comfort, reduce fatigue during long-term operation, and facilitate the application of pushing or pulling force.

[0040] In a preferred embodiment, the system further includes a first locking nut 6 and a second locking nut 11. The upper supporting sleeve 4 is fixedly connected to the outer sleeve rod 1 via the first locking nut 6, and the lower supporting sleeve 10 is fixedly connected to the inner rod 12 via the second locking nut 11. The first locking nut 6 and the second locking nut 11 enable detachable connection between the supporting sleeve and the outer sleeve rod 1 and the inner rod 12, facilitating the replacement of cleaning heads of different specifications according to actual cleaning needs and enhancing the adaptability of the tool. At the same time, the nut locking structure ensures the stability of the connection, preventing the supporting sleeve from loosening or falling off during the cleaning process, and ensuring the safety and reliability of the cleaning operation.

[0041] The following is a method for using the cleaning tool for thermocouple calibration furnace holes provided by this utility model.

[0042] First, adjust the size of the cleaning head by pushing, pulling, or rotating the movable handle 3 according to the diameter of the furnace hole. When it is necessary to insert the tool into the furnace hole, operate the movable handle 3 to move the inner rod 12, so that the lower support sleeve 10 is closer to the upper support sleeve 4. At this time, under the action of the four-bar linkage, the arc-shaped wiping blade 8 moves towards the axis of the outer sleeve rod 1, reducing the overall diameter of the cleaning head so that it can be smoothly inserted into the furnace hole. After entering the furnace hole, release the movable handle 3. The elastic reset element (such as spring 9) will push the lower support sleeve 10 away from the upper support sleeve 4, and then, through the four-bar linkage, move the arc-shaped wiping blade 8 away from the axis until its outer surface is in close contact with the inner wall of the furnace hole. Then, hold the fixed handle 2 and the movable handle 3, slowly rotate and move the tool axially, so that the arc-shaped wiping blade 8 can thoroughly wipe the inner wall of the furnace hole. The wear-resistant or absorbent material layer on the outer surface of the arc-shaped wiping pad 8 effectively removes dust, impurities, and other dirt from the inner wall. Furthermore, because the curvature of the arc-shaped wiping pad 8 is adapted to the inner wall of the furnace hole, it minimizes cleaning dead zones. After cleaning, operate the movable handle 3 again to retract the arc-shaped wiping pad 8, allowing the tool to be removed from the furnace hole. For furnace holes of different sizes, simply repeat the steps described above for adjusting the cleaning head size to complete the cleaning work. The entire process is simple to operate, significantly improving cleaning efficiency and effectiveness while avoiding damage to the furnace hole wall.

[0043] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A cleaning tool for thermocouple calibration furnace boreholes, characterized in that: include: Outer sleeve rod; The inner rod is axially movable and accommodated within the outer sleeve rod; The handle includes a fixed handle and a movable handle. The fixed handle is fixedly connected to one end of the outer sleeve rod. The movable handle is movably connected to the outer sleeve rod or the fixed handle by pushing, pulling or rotating. The movable handle is also connected to the inner rod to drive the inner rod to move within the outer sleeve rod. as well as The cleaning head includes an upper supporting cylindrical sleeve, a lower supporting cylindrical sleeve, at least two arc-shaped wiping pads, multiple first connecting rods, and multiple second connecting rods. The upper supporting cylindrical sleeve is fixedly connected to the end of the outer sleeve rod away from the fixed handle. The lower supporting cylindrical sleeve is fixedly connected to the end of the inner rod away from the movable handle and extending beyond the outer sleeve rod, so that it moves closer to or away from the upper supporting cylindrical sleeve under the action of the inner rod. The arc-shaped wiping pads are radially distributed around the axis of the outer sleeve rod. One end of each of the first connecting rods... The first connecting rod is hinged to the arc-shaped wiping pad at one end and to the upper support sleeve at the other end. The second connecting rod is hinged to the arc-shaped wiping pad at one end and to the lower support sleeve at the other end, so that the arc-shaped wiping pad, the first connecting rod, the upper support sleeve, the lower support sleeve and the second connecting rod together form a four-bar linkage mechanism, so that the arc-shaped wiping pad moves away from or towards the axis of the outer sleeve rod as the lower support sleeve moves closer to or away from the upper support sleeve.

2. The cleaning tool for the thermocouple calibration furnace borehole according to claim 1, characterized in that: It also includes an elastic reset member, which is sleeved on the outside of the inner rod extending out of the outer sleeve rod. One end of the elastic reset member is fixedly connected to the upper support sleeve, and the other end is fixedly connected to the lower support sleeve, so as to provide an outward opening pre-tightening force for the arc-shaped wiping pad.

3. The cleaning tool for the thermocouple calibration furnace borehole according to claim 2, characterized in that: The elastic reset element is a spring.

4. The cleaning tool for the thermocouple calibration furnace borehole according to claim 3, characterized in that: The number of first connecting rods in the four-bar linkage is multiple and arranged in parallel.

5. The cleaning tool for the thermocouple calibration furnace borehole according to claim 4, characterized in that: The curvature of the arc-shaped wiping pad is adapted to the curvature of the inner wall of the thermocouple calibration furnace hole.

6. The cleaning tool for the thermocouple calibration furnace borehole according to claim 5, characterized in that: The outer surface of the arc-shaped wiping pad is provided with a layer of abrasion-resistant material or an adsorbent material.

7. The cleaning tool for the thermocouple calibration furnace borehole according to claim 6, characterized in that: The number of the arc-shaped wiping pads is 3-6.

8. The cleaning tool for the thermocouple calibration furnace borehole according to claim 7, characterized in that: It also includes multiple first connectors and multiple second connectors. The first connecting rod is hinged to the upper support sleeve and the arc-shaped wiping pad through the first connector. The second connecting rod is hinged to the lower support sleeve and the arc-shaped wiping pad through the second connector.

9. The cleaning tool for the thermocouple calibration furnace borehole according to claim 8, characterized in that: The outer sleeve rod is provided with a sliding guide groove, and the movable handle passes through the sliding guide groove and is fixedly connected to the inner rod.

10. The cleaning tool for the thermocouple calibration furnace borehole according to claim 9, characterized in that: The movable handle has an arc-shaped finger adapter groove on the side away from the fixed handle.

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