Device for adjusting thermocouple wiring through driving of gear and rack

Abstract

The utility model belongs to the technical field of temperature measuring devices of high-temperature and high-pressure equipment, and particularly relates to a gear and rack driven thermocouple wiring adjusting device. Comprising a fixed seat, a movable seat, a rack, a driving seat, a driving shaft and a gear, the movable seat is horizontally and slidably arranged in the fixed seat, the rack is arranged on the movable seat, the driving shaft is rotatably arranged in the driving seat, and the gear is arranged at one end of the driving shaft; the movable seat comprises a first movable seat and a second movable seat, the second movable seat is detachably arranged in the first movable seat, the movable seat comprises the first movable seat and the second movable seat, the rack is arranged on the first movable seat, the thermocouple is fixed on the second movable seat, and the first movable seat is detachably connected with the second movable seat. And when the thermocouple needs to be replaced, the rack and the first moving seat do not need to be detached from the fixed seat, and only the second moving seat needs to be detached from the first moving seat, so that the installation is convenient.

Description

[0001] This application claims priority to Chinese patent application No. 202422643294.1 filed on October 31, 2024, entitled “A Gear Rack Driven Thermocouple Wiring Device,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The utility model belongs to the technical field of temperature measuring devices for high-temperature and high-pressure equipment, in particular to a gear rack driven regulating thermocouple wiring device. Background Art

[0003] High-temperature and high-pressure equipment such as gasification furnaces need to be shut down for maintenance after running for a period of time. The gasification furnace will produce slag on the furnace wall during normal operation. The slag is in a molten state at high temperatures. Cooling down during shutdown for maintenance will cause the slag on the inner wall of the furnace to block the thermocouple installation hole once it cools down, affecting the installation of new thermocouples after maintenance. For this reason, the applicant has previously applied for a patent for an adjustable temperature measuring device for high-temperature and high-pressure equipment with publication number CN115823903A. The position of the thermocouple is adjusted by the combination of gears and racks, and the reciprocating motion of the thermocouple can knock the slag that has not been fully cooled down from the thermocouple installation hole, and the position of the thermocouple can be adjusted when the new thermocouple is installed. However, when replacing the thermocouple, the entire rack needs to be removed from the fixed seat, which makes disassembly and installation very inconvenient, especially during installation, when accurate calibration and positioning are required.

[0004] In addition, the gear rack drive space of the device is inside the fixed device. Due to the adjustment structure, the drive space is large, the equipment volume is large, and the adjustment structure is relatively complex. The cumulative error of the processed parts is too large, the processing cost is high, and it will affect the accuracy of the thermocouple position adjustment. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a rack and pinion driven thermocouple wiring device which has a simple structure, is easy to install and can accurately adjust the position of the thermocouple.

[0006] The technical solution adopted by the utility model to solve the technical problem is as follows: the gear rack driven thermocouple wiring device comprises a fixed seat, a movable seat, a rack, a driving seat, a driving shaft and a gear, the movable seat is horizontally slidably arranged in the fixed seat, the rack is arranged on the movable seat, the driving shaft is rotatably arranged in the driving seat, and the gear is arranged at one end of the driving shaft;

[0007] The movable seat comprises a first movable seat and a second movable seat, the second movable seat is detachably arranged in the first movable seat, the rack is arranged outside the first movable seat and the rack is meshed with the gear, and the second movable seat is provided with a thermocouple fixing structure for fixing the thermocouple.

[0008] Preferably, a first opening slot is provided on the fixing seat, a second opening slot is provided on the driving seat, the gear is provided at the second opening slot, the first opening slot and the second opening slot engage with each other to form a driving space, and the gear engages with the rack in the driving space.

[0009] Preferably, a sliding groove is provided on the inner side of the fixing seat, the first opening groove is connected to the sliding groove, and the rack is slidably provided in the sliding groove.

[0010] Preferably, a fixed platform is provided on the inner side of one end of the first movable seat, a retaining spring is provided on the inner side of the other end, and the second movable seat is arranged between the fixed platform and the retaining spring.

[0011] Preferably, a first limiting step is provided on the inner side of the fixed seat, and an annular second limiting step is provided on the outer side of the second movable seat, and the outer diameter of the second limiting step is smaller than the inner diameter of the first limiting step.

[0012] Preferably, the drive seat includes a first drive seat and a second drive seat, one end of the second drive seat is arranged in the first drive seat, the gear is arranged in the first drive seat, the drive shaft passes through the second drive seat and then connects to the gear, and a sealing mechanism is provided between one end of the second drive seat and the first drive seat.

[0013] Preferably, the sealing structure includes a packing seal and a sealing sleeve, the inner diameter of one end of the first drive seat close to the second drive seat is larger than the inner diameter of the other end, a positioning platform is formed on the inner side of the first drive seat, and the packing seal and the sealing sleeve are arranged between one end of the second drive seat and the positioning platform.

[0014] Preferably, the sealing structure further comprises a fixed sleeve, a packing seal is provided between the sealing sleeve and the fixed sleeve, the fixed sleeve is connected to the positioning platform, and the sealing sleeve is connected to the second driving seat;

[0015] Alternatively, a group of packing seals is provided on both sides of the sealing sleeve, wherein one group of packing seals is connected to the fixed sleeve, and the other group of packing seals is connected to the second driving seat;

[0016] Alternatively, one side of the sealing sleeve is arranged on the positioning platform, and the other side contacts one end of the packing seal, and the other end of the packing seal contacts one end of the second driving seat.

[0017] Preferably, a bearing is provided between the fixed sleeve and the drive shaft.

[0018] Preferably, sealing rings are provided on the inner and outer rings of the sealing sleeve respectively.

[0019] Preferably, the first drive seat is fixedly connected to the second drive seat, and a drive shaft fixing assembly is provided at the other end of the drive shaft, which is also fixedly connected to the first drive seat.

[0020] Compared with the existing technology, the beneficial effects of this technical solution are:

[0021] The utility model sets the movable seat as a first movable seat and a second movable seat, sets the rack on the first movable seat, fixes the thermocouple on the second movable seat, and the first movable seat and the second movable seat are detachably connected. When the thermocouple needs to be replaced, there is no need to remove the rack and the first movable seat from the fixed seat, and it is only necessary to remove the second movable seat from the first movable seat, which is convenient for installation.

[0022] The meshing position of the gear and the rack is set at the junction of the movable seat and the fixed seat. The gear is meshed with the rack in a driving space formed by the mutual engagement of the first open groove and the second open groove to drive the movable seat to move. The position of the thermocouple is adjusted by rotating the driving shaft, which reduces the driving space, has a small volume, a better sealing effect, a simple structure, reduces the excessive cumulative error caused by the complex structure, and makes the measured temperature more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of Example 1 of the rack and pinion driven thermocouple wiring device of the present invention.

[0024] Figure 2 This is a schematic diagram of the structure of the thermocouple connection base in Example 1.

[0025] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0026] Figure 4 This is a partial enlarged view of point B in the figure.

[0027] Figure 5 This is a structural diagram of Example 2 of the rack and pinion driven thermocouple wiring device of the present invention.

[0028] Figure 6 This is a structural diagram of Example 3 of the rack and pinion driven thermocouple wiring device of the present invention.

[0029] Figure 7 for Figure 6 Cross-sectional view at CC.

[0030] Among them: 1, fixed seat 2, first movable seat 3, second movable seat 4, rack 5, first opening groove 6, second opening groove 7, sliding groove 8, first drive seat 9, second drive seat 10, gear 11, drive shaft 12, sealing sleeve 13, packing seal 14, sealing ring 15, fixed platform 16, retaining ring 17, first limiting step 18, second limiting step 19, fixed sleeve 20, bearing 21, pressure seat 22, fixing bolt 23, first flange 24, second flange 25, third flange. DETAILED DESCRIPTION

[0031] Figures 1 to 4 This is the best embodiment of the present invention, Figures 1 to 7 The utility model is further described.

[0032] Example 1

[0033] Reference Figures 1 and 2 The rack and pinion driven thermocouple wiring device includes a fixed seat 1, a movable seat, a rack 4, a driving seat, a driving shaft 11 and a gear 10. The movable seat is horizontally slidably arranged in the fixed seat 1, the rack 4 is arranged on the movable seat, the driving shaft 11 is rotatably arranged in the driving seat, and the gear 10 is arranged at one end of the driving shaft 11. The movable seat includes a first movable seat 2 and a second movable seat 3. The second movable seat 3 is detachably arranged in the first movable seat 2. The rack 4 is arranged on the outer side of the first movable seat 2 and is engaged with the gear 10. The second movable seat 3 is provided with a thermocouple fixing structure for fixing the thermocouple. A rotating handwheel or handle is provided at the end of the driving shaft 11 extending out of the driving seat. The driving shaft 11 is rotated by the handwheel or handle. The gear 10 drives the movable seat to slide horizontally in the fixed seat 1 through the rack 4, thereby driving the thermocouple to perform horizontal telescopic movement.

[0034] The drive base includes a first drive base 8 and a second drive base 9. A first flange 23 is provided at one end of the first drive base 8. The second drive base 9 is a cylindrical body with a second flange 24 in the middle. A through-hole is provided within the second drive base 9, and one end of the second drive base 9 is disposed within the first drive base 8. The first and second drive bases 8 and 9 are connected by a flange. A gear 10 is disposed inside the first drive base 8. A drive shaft 11 passes through the second drive base 9 and is fixedly connected to the gear 10. A sealing mechanism is provided between one end of the second drive base 9 and the first drive base 8 to seal the drive shaft 11 and prevent gas leakage through the gap between the drive shaft 11 and the second drive base 9.

[0035] The fixing seat 1 and the first driving seat 8 in this embodiment can be connected in various ways, such as forming the two into one piece, or connecting them by welding.

[0036] Specifically, the sealing mechanism includes a packing seal 13, a sealing sleeve 12, and a fixed sleeve 19. The inner diameter of one end of the first drive seat 8 adjacent to the second drive seat 9 is larger than the inner diameter of the other end. A positioning platform is formed on the inner side of the first drive seat 8. One side of the sealing sleeve 12 is disposed on the positioning platform. The packing seal 13 is disposed between the sealing sleeve 12 and the fixed sleeve 19. The fixed sleeve 19 is connected to the positioning platform, and the sealing sleeve 12 is connected to the second drive seat 9. The rack-and-pinion driven thermocouple wiring device is provided with a sealing sleeve 12, which can still seal the drive shaft 11 even after the packing seal 13 fails, thereby improving sealing performance.

[0037] Since the gear 10 is to be installed in the first drive seat 8, the inner diameter of the positioning platform cannot be too small, but the outer diameter cannot be too large, otherwise the overall size will be larger, which will cause the overall size of the positioning platform to be smaller, and then the packing seal 13 will not have enough filling space. The present application sets a fixed sleeve 19 at the positioning platform, which can form a larger packing space with the fixed sleeve 19 to ensure reliable sealing of the drive shaft 11. At the same time, a bearing 20 is provided between the fixed sleeve 19 and the drive shaft 11 to ensure flexible rotation of the drive shaft 11. A locking nut is provided on the side of the bearing 20 close to the gear 10 to prevent the drive shaft 11 from axial displacement when tightening the nut of the fixing handle or rotating the drive shaft 11 by the handle.

[0038] The fixed base 1 has flanges at both ends, securing it to the outside of the furnace wall. The first and second movable bases 2 and 3 are positioned within the through-holes of the fixed base 1. The thermocouple mounting structure consists of a through-hole formed inside the second movable base 3, and a screw hole for securing the thermocouple is provided on the sidewall of the second movable base 3.

[0039] A first opening slot 5 is defined on the outer circumference of the fixing base 1, and a corresponding second opening slot 6 is defined on the first driving base 8. The first opening slot 5 and the second opening slot 6 mate with each other, allowing the gear 10 to mesh with the rack 4. When the drive shaft 11 is rotated, the gear 10 rotates, thereby driving the rack 4 to perform horizontal telescopic movement. A sliding slot 7 is provided on the inner wall of the through hole of the fixing base 1, and the rack 4 moves horizontally within the sliding slot 7.

[0040] See also Figure 3 A fixing platform 15 is provided on the inner side of one end of the first movable base 2, and a retaining spring 16 is provided on the inner side of the other end. The second movable base 3 is arranged between the fixing platform 15 and the retaining spring 16. After removing the retaining spring 16, the second movable base 3 can be easily removed from the first movable base 2, so that the thermocouple can be easily replaced.

[0041] See also Figure 4A first limiting step 17 is provided on the inner side of the fixed seat 1, and an annular second limiting step 18 is provided on the outer side of the second movable seat 3. The outer diameter of the second limiting step 18 is smaller than the inner diameter of the first limiting step 17, thereby limiting the first movable seat 2 and the second movable seat 3 to prevent their travel from being too large.

[0042] The working process is as follows: After the high-temperature and high-pressure furnace is overhauled, a new thermocouple needs to be installed in the designated location for temperature measurement. After the vaporizer stops operating, the drive shaft 11 first drives the gear 10 to rotate back and forth, thereby driving the old thermocouple back and forth through the rack 4 to knock off the uncooled slag on the furnace wall, preventing the slag from cooling and sticking to the wall and affecting the installation of the new thermocouple.

[0043] When installing a new thermocouple, after removing the retaining ring 16, remove the second movable seat 3 and the old thermocouple from the first movable seat 2, install the new thermocouple on the second movable seat 3, and then reinstall the second movable seat 3 into the first movable seat. Insert the new thermocouple into the predetermined position, and the end of the thermocouple should be aligned with the inner wall of the furnace or retracted into the furnace wall. When the installation is completed and the test run is carried out, the position of the thermocouple is judged to be accurate according to the theoretical temperature value. If the temperature detected by the thermocouple is too high or the temperature rises too quickly, it means that the thermocouple has extended into the furnace and the thermocouple needs to be moved back. When adjusting, the drive shaft 11 is driven to rotate by the handwheel or handle, and the thermocouple is driven to move by the gear 10 and the rack 4, and finally the thermocouple is adjusted to the appropriate position.

[0044] Example 2

[0045] See also Figure 5 In this embodiment, the sealing mechanism is composed of a packing seal 13 and a sealing sleeve 12. One side of the sealing sleeve 12 is set on the positioning platform, and the other side is in contact with one end of the packing seal 13. The other end of the packing seal 13 is in contact with one end of the second drive seat 9.

[0046] In this embodiment, the sealing sleeve 12 has the following two functions. The first is that it can still seal the drive shaft 11 after the packing seal 13 fails to improve the sealing performance. The second is that since the gear 10 is to be installed in the first drive seat 8, the inner diameter of the positioning platform cannot be too small, but the outer diameter cannot be too large, otherwise the overall size will be larger, which will cause the overall size of the positioning platform to be small, and then the packing seal 13 does not have enough installation space. The present application fixes the sealing sleeve 12 at the positioning platform, and can use the sealing sleeve 12 to form a larger packing space to ensure reliable sealing of the drive shaft 11.

[0047] Example 3

[0048] See also Figure 6-7The second drive seat 9 is provided with a second flange 24 for connecting to the first flange 23. The first drive seat 8 and the second drive seat 9 are still fixedly connected via the flange. A drive shaft fixing assembly is provided at the other end of the drive shaft 11, which is also fixedly connected to the first drive seat. Specifically, the drive shaft fixing assembly in this embodiment is a third flange 25. The third flange 25 is located at the end of the drive shaft 11 away from the gear 10. The third flange 25 is located on the side of the second flange 24 away from the first flange 23. The third flange 25 is connected to the first flange 23 via fixing bolts 22. In this embodiment, both the second flange 24 and the third flange 25 are elliptical in shape, which facilitates the connection between the third flange 25 and the first flange 23.

[0049] In Example 1, the drive shaft 11 is connected to the second drive seat 9 via a pressure cap. However, since the drive shaft 11 and the second drive seat 9 are also connected via a fixed sleeve 19, the sealing structure between the second drive seat 9 and the fixed sleeve 19 causes a force to act between the drive shaft 11 and the second drive seat 9. This force makes it very difficult to remove the pressure cap. In this embodiment, the drive shaft 11 is connected to the first drive seat 8 via a third flange 25. This allows for easier removal of the drive shaft 11 without significant internal stress when removing the fixing bolts 22.

[0050] The sealing structure in this embodiment consists of a packing seal 13 and a sealing sleeve 12, and two groups of packing seals 13 are respectively arranged at both ends of the sealing sleeve 12, one group of packing seals 13 is connected to the fixed sleeve 19, and the other group of packing seals 13 is connected to the second drive seat 9, which has a better sealing effect.

[0051] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation thereto. Any person skilled in the art may utilize the above disclosure to modify or remodel the present invention into equivalent embodiments. However, any simple modification, equivalent variation, or modification of the above embodiment that does not depart from the technical content of the present invention and is based on the technical essence of the present invention shall still fall within the scope of protection of the present invention.

Claims

1. A rack and pinion driven thermocouple connection device, characterized in that: The invention comprises a fixed seat (1), a movable seat, a rack (4), a driving seat, a driving shaft (11) and a gear (10), wherein the movable seat is horizontally slidably arranged in the fixed seat (1), the rack (4) is arranged on the movable seat, the driving shaft (11) is rotatably arranged in the driving seat, and the gear (10) is arranged at one end of the driving shaft (11); The movable seat comprises a first movable seat (2) and a second movable seat (3), wherein the second movable seat (3) is detachably arranged in the first movable seat (2), the rack (4) is arranged outside the first movable seat (2), the rack (4) is engaged with the gear (10), and a thermocouple fixing structure for fixing the thermocouple is provided on the second movable seat (3).

2. A rack and pinion driven thermocouple connection device according to claim 1, characterized in that: The fixing seat (1) is provided with a first opening slot (5), the driving seat is provided with a second opening slot (6), the gear (10) is provided at the second opening slot (6), the first opening slot (5) and the second opening slot (6) engage with each other to form a driving space, and the gear (10) engages with the rack (4) in the driving space.

3. The rack-and-pinion driven thermocouple connection device according to claim 2, characterized in that: A sliding groove (7) is provided on the inner side of the fixing seat (1), the first opening groove (5) is connected to the sliding groove (7), and the rack (4) is slidably provided in the sliding groove (7).

4. The rack-and-pinion driven thermocouple connection device according to claim 1, characterized in that: A fixed platform (15) is provided on the inner side of one end of the first movable seat (2), and a retaining spring (16) is provided on the inner side of the other end. The second movable seat (3) is arranged between the fixed platform (15) and the retaining spring (16).

5. The rack-and-pinion driven thermocouple connection device according to claim 1, characterized in that: A first limiting step (17) is provided on the inner side of the fixed seat (1), and an annular second limiting step (18) is provided on the outer side of the second movable seat (3). The outer diameter of the second limiting step (18) is smaller than the inner diameter of the first limiting step (17).

6. The rack-and-pinion driven thermocouple connection device according to claim 1, characterized in that: The drive seat comprises a first drive seat (8) and a second drive seat (9), one end of the second drive seat (9) is arranged in the first drive seat (8), the gear (10) is arranged in the first drive seat (8), the drive shaft (11) passes through the second drive seat (9) and is connected to the gear (10), and a sealing mechanism is provided between one end of the second drive seat (9) and the first drive seat (8).

7. The rack-and-pinion driven thermocouple connection device according to claim 6, characterized in that: The sealing mechanism includes a packing seal (13) and a sealing sleeve (12); the inner diameter of one end of the first drive seat (8) close to the second drive seat (9) is larger than the inner diameter of the other end; a positioning platform is formed on the inner side of the first drive seat (8); the packing seal (13) and the sealing sleeve (12) are arranged between one end of the second drive seat (9) and the positioning platform.

8. The rack-and-pinion driven thermocouple connection device according to claim 6, characterized in that: The sealing mechanism further includes a fixed sleeve (19), a packing seal (13) is arranged between the sealing sleeve (12) and the fixed sleeve (19), the fixed sleeve (19) is connected to the positioning platform, and the sealing sleeve (12) is connected to the second drive seat (9); Alternatively, a group of packing seals (13) are provided on both sides of the sealing sleeve (12), wherein one group of packing seals (13) is connected to the fixed sleeve (19), and the other group of packing seals (13) is connected to the second drive seat (9); Alternatively, one side of the sealing sleeve (12) is arranged on the positioning platform, and the other side contacts one end of the packing seal (13), and the other end of the packing seal (13) contacts one end of the second drive seat (9).

9. The rack-and-pinion driven thermocouple connection device according to claim 8, characterized in that: Sealing rings (14) are respectively provided on the inner and outer rings of the sealing sleeve (12).

10. The rack-and-pinion driven thermocouple connection device according to claim 6, characterized in that: The first drive seat (8) is connected to the second drive seat (9), and a drive shaft fixing assembly is provided at the other end of the drive shaft (11), and the drive shaft fixing assembly is also connected to the first drive seat (8).

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