Infrared online measuring device for hearth temperature

Abstract

The utility model relates to the technical field of boiler temperature measurement, in particular to a hearth temperature infrared online measuring device. The hearth temperature infrared on-line measuring device comprises a fixing box with one side provided with an opening, the side, opposite to the opening, of the fixing box is provided with a detection hole for a temperature measuring probe to detect the temperature in a hearth, the fixing box comprises a box body and a sealing plate covering the side, opposite to the opening, of the box body, and the detection hole is formed in the sealing plate; the sealing plate is provided with a bolt through hole, the box body is provided with a threaded hole used for being in threaded fit with a bolt penetrating through the bolt through hole, and the sealing plate is pressed on the box body through the head of the bolt. The diameter of the bolt penetrating hole is larger than that of the threaded hole, and the bolt penetrating hole is used for adjusting the relative position of the sealing plate and the fire peeping hole so that the temperature measuring probe can be centered with the fire peeping hole. The fixing box is of a split structure, the relative position of the sealing plate and the box body can be adjusted so as to adjust the relative position of the probe hole in the sealing plate and the fire peeping hole, the temperature measuring probe and the fire peeping hole can be centered, and the accuracy of the temperature measuring probe for measuring the temperature in the hearth is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler temperature measurement, in particular to an infrared online measuring device for furnace temperature. Background Art

[0002] By accurately measuring the furnace temperature in real time, it is possible to judge, predict and diagnose the combustion state of the boiler, control the reasonable and sufficient combustion of the fuel inside the furnace, and ensure good flame fullness and symmetry. Generally, an infrared thermometer is used to measure the furnace temperature. The infrared thermometer measures the radiation energy of the flame in the furnace, and then calculates the flue gas temperature according to the formula.

[0003] In order to enable the infrared thermometer to measure the radiation energy of the gas in the furnace, a fire peep hole is opened on the water-cooled wall of the furnace body. The infrared thermometer probe line of sight can detect the radiation energy of the flue gas in the furnace through the fire peep hole. The water-cooled wall includes a plurality of water-cooled wall tubes arranged in parallel and spaced apart. Adjacent water-cooled wall tubes are connected by water-cooled wall fins. The fire peep hole is processed on the water-cooled wall fins. Since the interval between adjacent water-cooled wall tubes is small, if the diameter of the fire peep hole is large and larger than the interval between adjacent parallel water-cooled wall tubes, the water-cooled wall tube needs to be designed to be curved to avoid the fire peep hole, resulting in a complex structure of the water-cooled wall. Therefore, the diameter of the fire peep hole is generally small.

[0004] The water-cooled wall is divided into vertical water-cooled wall and spiral water-cooled wall according to the shape of the water-cooled wall tubes. The water-cooled wall tubes of the vertical water-cooled wall extend in the vertical direction and adjacent water-cooled wall tubes are arranged in parallel and spaced apart. The water-cooled wall tubes of the spiral water-cooled wall are spirally shaped around the vertical axis.

[0005] The infrared thermometer in the prior art, such as the furnace infrared thermometer disclosed in the Chinese utility model patent document with the authorization announcement number CN205981455U, includes an infrared thermometer and a sleeve unit, a sealing steel plate is fixed on the water-cooled wall at the fire peep hole, and a detection hole aligned with the axis of the fire peep hole is provided on the sealing steel plate. The temperature probe of the infrared thermometer (i.e., the lens in the above patent document) is placed in the inner cavity of one end of the sleeve unit, and the other end of the sleeve unit is welded and fixed on the sealing steel plate at the detection hole, so that the inner cavity of the sleeve unit is aligned with the axis of the detection hole, and then the temperature probe is aligned with the axis of the fire peep hole, and the line of sight of the temperature probe can measure the temperature of the flame in the furnace. The currently known sealing steel plate is fixed to the water-cooled wall by a rigid beam assembly, and the rigid beam assembly forms a surrounding platform, which is closed in an annular direction and has openings on both sides. One side with the opening is welded and fixed to the water-cooled wall, and the sealing steel plate is welded and fixed to the side with the remaining opening to form a sealed fixed box.

[0006] Although the above furnace infrared thermometer can measure the temperature inside the furnace, the sleeve unit is fixed on the water-cooled wall by a sealing steel plate, and the position of the sealing steel plate fixed on the water-cooled wall determines the relative position of the temperature probe and the fire peep hole. When the thermometer is actually installed, due to the installation error and processing error of the sealing steel plate, it is impossible to ensure that the detection hole of the sealing steel plate and the fire peep hole on the water-cooled wall are aligned, resulting in misalignment between the temperature probe and the fire peep hole axis, thereby reducing the accuracy of the furnace temperature measured by the infrared temperature probe. Utility Model Content

[0007] The utility model aims to provide an infrared online measuring device for furnace temperature, so as to solve the technical problem that the temperature in the furnace measured by the temperature measuring probe is of low accuracy because the inner cavity of the mounting base of the existing measuring device is easily misaligned with the fire peep hole on the water-cooled wall.

[0008] In order to achieve the above-mentioned purpose, the technical scheme of the infrared online measurement device for furnace temperature of the utility model is:

[0009] The infrared online measuring device for furnace temperature comprises a fixing box with an opening on one side for buckling on a water-cooled wall at a fire peep hole, a detection hole for a temperature measuring probe to detect the temperature in the furnace is provided on the side of the fixing box facing away from the opening, the fixing box comprises a box body and a sealing plate covering the side of the box body facing away from the opening, the detection hole is arranged on the sealing plate; a bolt through hole is provided on the sealing plate, a threaded hole for matching with a bolt thread passing through the bolt through hole is provided on the box body, the axis of the threaded hole is parallel to the axis of the detection hole, and the sealing plate is pressed against the box body by the bolt head; the diameter of the bolt through hole is larger than the diameter of the threaded hole, and is used to adjust the relative position of the sealing plate and the fire peep hole so that the temperature measuring probe and the fire peep hole are aligned.

[0010] The beneficial effect is that in the infrared online measuring device for furnace temperature of the utility model, the fixed box is a split structure, and the box body of the fixed box is connected with the sealing plate on the side of the box body facing away from the fire peep hole by bolts, so that the sealing plate is pressed against the box body by the bolts. Since the diameter of the bolt perforation on the sealing plate is larger than the diameter of the threaded hole on the box body, the sealing plate and the box body can still be connected together by bolts when the bolt perforation and the threaded hole are eccentric. Therefore, after the box body is fixed on the water-cooled wall, when the temperature measuring probe is misaligned with the axial center of the fire peep hole, the relative position of the sealing plate and the box body can be adjusted to adjust the relative position of the detection hole on the sealing plate and the fire peep hole, so that the temperature measuring probe is aligned with the fire peep hole, so as to improve the accuracy of the temperature measuring probe in measuring the temperature in the furnace.

[0011] As a further improvement, a connecting ear plate is provided on the box body, and the threaded hole is arranged on the connecting ear plate.

[0012] The beneficial effect is that such a design can process threaded holes through the connecting ear plates when the wall thickness of the box body is relatively thin, and when the wall thickness of the box body is relatively thin, it is beneficial to avoid interference between the box body and the water-cooled wall tubes of the water-cooled wall, thereby reducing the difficulty of installing the box body.

[0013] According to a further improvement, the connecting ear plate is vertically fixed on the inner wall of the box body.

[0014] The beneficial effect is that such a design can reduce the size of the sealing plate.

[0015] As a further improvement, four connecting ear plates are provided, and the four connecting ear plates are respectively arranged at the four corners of the box body.

[0016] A further improvement includes a sleeve, one end of which passes through the detection hole and is fixedly connected to the sealing plate, and the other end of the sleeve is provided with a connection structure for cooperating with the temperature measuring instrument.

[0017] The beneficial effect is that such a design increases the distance between the temperature measuring probe and the fire peep hole, and reduces the damage to the temperature measuring probe caused by the high temperature energy radiated from the fire peep hole.

[0018] According to a further improvement, the sleeve and the sealing plate are detachably connected.

[0019] The beneficial effect is that such a design enables the casing to be taken out without removing the sealing plate, thereby reducing the disassembly and installation steps when inspecting or replacing the casing, thereby improving work efficiency.

[0020] As a further improvement, a connecting sleeve coaxially arranged with the detection hole is provided on the side of the sealing plate facing away from the opening of the fixing box, the sleeve passes through the connecting sleeve, and a fixing screw is connected to the outer circumference of the connecting sleeve to radially fix the sleeve.

[0021] The beneficial effect is that the connection sleeve and the sleeve can be detachably connected by such a design, and the sleeve can be removed by simply removing the set screw, thereby reducing the number of removed parts.

[0022] As a further improvement, the connecting sleeve has a flange extending radially outward, and the flange is connected to the sealing plate by bolts.

[0023] The beneficial effect is that, with such a design, the sealing plate and the sleeve are detachably connected to the connected parts respectively, and when a certain part is repaired or replaced, the other connected parts can be removed, so as to reduce the repair cost.

[0024] As a further improvement, a coaxially distributed flange is provided at one end of the sleeve away from the detection hole, and a flange connection hole for connecting with a measuring instrument is provided on the flange, and the flange constitutes the connection structure.

[0025] The beneficial effect is that the flange connected to the measuring instrument is coaxially distributed with the sleeve, which is conducive to ensuring that the temperature probe of the measuring instrument is coaxial with the sleeve, and further conducive to achieving the centering of the temperature probe and the fire peephole.

[0026] As a further improvement, the top and bottom parts of the fixing box are provided with arc-shaped grooves at one end close to the opening, which are matched with the water-cooled wall tubes of the water-cooled wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the use state of an embodiment of the infrared online measurement device for furnace temperature of the utility model;

[0028] Figure 2 yes Figure 1 Schematic diagram of the structure from another perspective;

[0029] Figure 3 yes Figure 1 A top view of

[0030] Figure 4 yes Figure 3 Schematic diagram of the structure in which the middle fixing box is installed on the water-cooled wall.

[0031] Explanation of the reference numerals: 11. Water-cooled wall tube; 12. Water-cooled wall fin; 13. Fire peephole; 14. Fixing box; 15. Box body; 16. Closing plate; 17. Flange; 18. Connecting sleeve; 19. Set screw; 20. Bushing; 21. Infrared measuring instrument; 22. Temperature measuring probe; 23. Flange; 24. Connecting ear plate; 25. Bolt through hole; 26. Threaded hole; 27. Detection hole; 28. Screw hole for sealing plate. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0034] It should be noted that, in the specific implementation of the utility model, the terms such as "first" and "second" and other relational terms that may appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of such an actual relationship or order between these entities or operations. Moreover, the terms such as "include", "comprise" or any other variants thereof that may appear are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also include elements inherent to such process, method, article or equipment. In the absence of further restrictions, the phrase "including a ..." and other limited elements that may appear do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms that may appear, such as "installed", "connected", and "connected", 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the term "provided with" that may appear should be understood in a broad sense. For example, the object "provided with" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or an inseparable connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The present invention will be described in further detail below in conjunction with the embodiments.

[0038] Embodiment 1 of the infrared online measuring device for furnace temperature provided by the utility model:

[0039] like Figures 1 to 3 As shown, the device of the utility model is applied to a boiler, the boiler comprises a furnace body, an instrument box and a mounting base, the water-cooled wall of the furnace body comprises a plurality of water-cooled wall tubes 11 extending vertically in the up-down direction, adjacent water-cooled wall tubes 11 are connected by water-cooled wall fins 12, and a fire peep hole 13 with a diameter of 8 to 12 mm is provided on the water-cooled wall fins 12. The instrument box has an infrared measuring instrument 21, and the instrument box is fixed to the furnace body through the mounting base, so that the field of view of the temperature measuring probe 22 of the infrared thermometer can pass through the fire peep hole 13 to observe the flame temperature in the furnace.

[0040] The infrared online measuring device for furnace temperature includes a fixed box 14 and a sleeve 20. The fixed box 14 includes a box body 15 and a sealing plate 16. The box body 15 is a square structure, including an upper side wall and a lower side wall parallel to each other, and a left side wall and a right side wall parallel to each other, that is, both sides of the box body 15 have openings. The sealing plate 16 covers one side of the box body 15 with an opening, and the remaining side of the box body 15 with an opening is buckled on the water-cooled wall at the fire peep hole 13, so that a better sealing structure is formed between the fixed box 14 and the water-cooled wall to isolate the high-temperature flue gas in the furnace body. Among them, the left side wall and the right side wall are respectively welded and fixed on the water-cooled wall fin 12, with a large welding area to ensure the firmness of the welding of the fixed box 14 and play a role in supporting the weight of the mounting base and the instrument box without the need for a complex supporting structure. A plurality of arc-shaped (semicircular in this embodiment) avoidance grooves are provided on the upper side wall and the lower side wall, and the avoidance grooves are adapted to the outer peripheral surface of the water-cooled wall tube 11 to avoid the water-cooled wall tube 11 between the left side wall and the right side wall.

[0041] like Figure 3 and Figure 4 As shown, the box body 15 is provided with connecting ear plates 24 at the four corners of the side close to the sealing plate 16. The connecting ear plates 24 are vertically fixed on the inner wall of the box body 15. Each connecting ear plate 24 is provided with a threaded hole 26 extending in the front-to-back direction. The four corners of the sealing plate 16 are provided with bolt through holes 25. The diameter of the bolt through holes 25 is larger than the diameter of the threaded hole 26. The bolts passing through the bolt through holes 25 and threadedly matched with the threaded holes 26 press the sealing plate 16 onto the box body 15.

[0042] A detection hole 27 is provided at the center of the sealing plate 16, and when the fixing box 14 is buckled on the water-cooled wall, the detection hole 27 is aligned with the fire peep hole 13. The diameter of the detection hole 27 is the same as the outer diameter of the sleeve 20, and the sleeve 20 passes through the detection hole 27 and extends into one end of the fixing box 14 and is fixed on the sealing plate 16, so that the sleeve 20 is aligned with the fire peep hole 13. Specifically, a connecting sleeve 18 coaxially arranged with the detection hole 27 is provided on the side of the sealing plate 16 facing away from the fire peep hole 13, and the sleeve 2 passes through the connecting sleeve 18 and the detection hole 27 in sequence. A sleeve body screw hole extending radially is provided on the outer peripheral surface of the connecting sleeve 18, and a set screw 19 is installed in the sleeve body screw hole and the top is pressed against the outer peripheral surface of the sleeve 20 to radially fix the sleeve 20; the connecting sleeve 18 also has a flange 17 extending radially outward, and the flange 17 is provided with four flange through holes evenly spaced along the circumference of the detection hole 27, and a sealing plate screw hole 28 is provided on the sealing plate 16. Bolts pass through the flange through holes and are threadedly matched with the sealing plate screw holes 28 to connect the connecting sleeve 18 and the sealing plate 16. In this way, a detachable connection between the sleeve 20 and the sealing plate 16 can be achieved to facilitate the maintenance and replacement of the sleeve 20.

[0043] One end of the sleeve 20 passing through the box body 15 is provided with a coaxially distributed flange 23, and the flange 23 is provided with a connecting hole for the flange 23. Bolts are installed in the connecting hole of the flange 23 to fix the instrument box on the sleeve 20, so that the temperature probe 22 of the measuring instrument passes through the inner cavity of the sleeve 20 and is coaxially arranged with the sleeve 20, and then the temperature probe 22 is aligned with the fire peephole 13.

[0044] It should be noted that since the sleeve 20 is installed and fixed in the center position of the sealing plate 16, when the fixing box 14 is fixed on the water-cooled wall, the number of water-cooled wall tubes 11 between the left wall of the box body 15 and the fire peep hole 13 and the number of water-cooled wall tubes 11 between the right wall and the fire peep hole 13 must be the same, and the left wall and the right wall of the box body 15 are respectively close to the adjacent water-cooled wall tubes 11 on the opposite side of the left wall and the right wall, so as to ensure that the center position of the box body 15 is aligned with the fire peep hole 13 as much as possible, so as to make the detection hole 27 at the center position of the sealing plate 16 aligned with the fire peep hole 13.

[0045] Since the diameter of the bolt through hole 25 is larger than the diameter of the threaded hole 26, the sealing plate 16 is pressed against the box body 15 by the bolts passing through the bolt through hole 25 and threadedly matched with the threaded hole 26. The sealing plate 16 and the box body 15 can still be connected together by bolts when the bolt through hole 25 and the threaded hole 26 are eccentric. Therefore, when the temperature measuring probe 22 and the fire peep hole 13 cannot be aligned after the fixing box 14 is welded and fixed on the water-cooled wall, the relative position of the sealing plate 16 and the box body 15 can be adjusted so that the detection hole 27 of the sealing plate 16 is aligned with the fire peep hole 13, and then the temperature measuring probe 22 is aligned with the fire peep hole 13, so that the measuring line of sight of the temperature measuring probe 22 can pass through the fire peep hole 13 to achieve accurate measurement of the temperature in the furnace.

[0046] In the measuring device of the utility model, the fixed box 14 is a split structure, and the box body 15 of the fixed box 14 is connected with the sealing plate 16 on the side of the box body 15 facing away from the fire peep hole 13 by bolts, so that the sealing plate 16 is pressed against the box body 15 by the bolts. Since the diameter of the bolt through hole 25 on the sealing plate 16 is larger than the diameter of the threaded hole 26 on the box body 15, the sealing plate 16 and the box body 15 can still be connected together by bolts when the bolt through hole 25 and the threaded hole 26 are eccentric. Therefore, when the temperature measuring probe 22 and the fire peep hole 13 are misaligned after the box body 15 is fixed on the water-cooled wall, the relative position of the sealing plate 16 and the box body 15 can be adjusted to adjust the relative position of the detection hole 27 on the sealing plate 16 and the fire peep hole 13, so that the temperature measuring probe 22 is aligned with the fire peep hole 13, so as to improve the accuracy of the temperature measuring probe 22 in measuring the temperature in the furnace. Moreover, the sleeves 20 and the sealing plate 16, and the sealing plate 16 and the box body 15 are all connected by bolts, so the installation is convenient.

[0047] Embodiment 2 of the infrared online measuring device for furnace temperature provided in the utility model:

[0048] The difference between this embodiment and the embodiment 1 is that in the embodiment 1, the box body 15 is provided with a connecting ear plate 24 vertically fixed on the inner wall of the box body 15, and the threaded hole 26 is provided on the connecting ear plate 24. In this embodiment, the connecting ear plate 24 is vertically fixed on the outer wall of the box body 15. In other embodiments, the connecting ear plate 24 may be omitted, and the threaded hole 26 is provided on the end surface of the box body 15 close to the sealing plate 16. It should be noted that the wall thickness of the box body 15 needs to be sufficient to ensure the processing of the threaded hole 26.

[0049] Embodiment 3 of the infrared online measuring device for furnace temperature provided in the utility model:

[0050] The difference between this embodiment and the first embodiment is that in the first embodiment, four connecting ear plates 24 are provided, and the four connecting ear plates 24 are respectively provided at the four corners of the box body 15. In this embodiment, the four connecting ear plates 24 are respectively provided at the middle positions of the four side walls of the box body 15. Of course, different numbers of connecting ear plates 24 may be selected according to actual needs, for example, six or eight.

[0051] Embodiment 4 of the infrared online measuring device for furnace temperature provided in the utility model:

[0052] The difference between this embodiment and embodiment 1 is that: in embodiment 1, a connecting sleeve 18 coaxially arranged with the detection hole 27 is provided on the side of the sealing plate 16 facing away from the opening, the sleeve 20 passes through the connecting sleeve 18, and a set screw 19 is connected to the outer peripheral surface of the connecting sleeve 18 to radially fix the sleeve 20, and the connecting sleeve 18 has a flange 17 extending radially outward, and the flange 17 is connected to the sealing plate 16 by bolts. In this embodiment, the connecting sleeve 18 is threadedly connected to the sleeve 20. In other embodiments, the sleeve 20 can be welded and fixed to the flange 17. At this time, in order to ensure the detachable connection between the sealing plate 16 and the sleeve 20, the flange 17 is detachably connected to the sealing plate 16. Of course, the flange 17 can also be welded and fixed to the sealing plate 16. In other embodiments, the connecting sleeve 18 can also be eliminated, and the sleeve 20 can be threadedly connected to the sealing plate 16 or directly welded to the sealing plate 16.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. An infrared online furnace temperature measuring device comprises a fixed box with an opening on one side, the opening being used to be buckled on the fire peephole on the water-cooled wall, and a detection hole for a temperature measuring probe to detect the temperature in the furnace is provided on the side of the fixed box facing away from the opening, characterized in that: The fixed box includes a box body and a sealing plate on the side of the box body facing away from the opening, and the detection hole is arranged on the sealing plate; a bolt through hole is arranged on the sealing plate, and a threaded hole for mating with the bolt thread passing through the bolt through hole is arranged on the box body, the axis of the threaded hole is parallel to the axis of the detection hole, and the sealing plate is pressed against the box body by the bolt head; the diameter of the bolt through hole is larger than the diameter of the threaded hole, and is used to adjust the relative position of the sealing plate and the fire peep hole so that the temperature measuring probe is centered with the fire peep hole.

2. The furnace temperature infrared online measuring device according to claim 1 is characterized in that: The box body is provided with a connecting ear plate, and the threaded hole is arranged on the connecting ear plate.

3. The furnace temperature infrared online measuring device according to claim 2 is characterized in that: The connecting ear plate is vertically fixed on the inner wall of the box body.

4. The furnace temperature infrared online measuring device according to claim 3 is characterized in that: There are four connecting ear plates, which are respectively arranged at the four corners of the box body.

5. The infrared online measuring device for furnace temperature according to any one of claims 1 to 4, characterized in that: The invention also comprises a sleeve, one end of which penetrates into the detection hole and is fixedly connected to the sealing plate, and the other end of the sleeve is provided with a connection structure for cooperating with the temperature measuring instrument.

6. The infrared online measurement device for furnace temperature according to claim 5, characterized in that: The sleeve is detachably connected to the sealing plate.

7. The infrared online measurement device for furnace temperature according to claim 6 is characterized in that: A connecting sleeve coaxially arranged with the detection hole is provided on the side of the sealing plate facing away from the opening of the fixing box, the sleeve passes through the connecting sleeve, and a set screw is connected to the outer circumference of the connecting sleeve to radially fix the sleeve.

8. The infrared online measurement device for furnace temperature according to claim 7 is characterized in that: The connecting sleeve has a flange extending radially outward, and the flange is connected to the sealing plate by bolts.

9. The infrared online measurement device for furnace temperature according to claim 5, characterized in that: A coaxially distributed flange is provided at one end of the sleeve away from the detection hole, and a flange connection hole for connecting with a measuring instrument is provided on the flange, and the flange constitutes the connection structure.

10. The infrared online measurement device for furnace temperature according to claim 1, characterized in that: The top and bottom parts of the fixing box are provided with arc grooves matching with the water-cooling wall tubes of the water-cooling wall at one end close to the opening.

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