Device for measuring heat conductivity coefficient of graphite composite insulation board

Abstract

The invention discloses a graphite composite insulation board heat conductivity coefficient measuring device, which comprises a determinator body, a heating unit, a bearing mechanism, a locking structure and an extrusion structure, the top of the determinator body is provided with a detection door, the heating unit is arranged at the top of the determinator body, and the two sides of the heating unit are respectively provided with a protection box; the bearing mechanism is rotationally connected to the opposite sides of the heating unit and the protection box; the locking structure is arranged at the top of the bearing mechanism; the multiple sets of extrusion structures are symmetrically arranged at the opposite ends of the multiple protection boxes, and linkage pieces are arranged between the extrusion structures and the locking structures. According to the device, an extrusion structure is adopted for clamping and fixing the graphite heat preservation composite board to be detected, the extrusion structure of the device adjusts the space of a heating area of the device in a rotary butt-clamping mode, meanwhile, rotary clamping is conducted from bottom to top, and it is guaranteed that the board to be detected can be tightly attached to the heating area to be detected; therefore, the device is more flexible in detection.

Description

Technical Field

[0001] The invention relates to the field of thermal conductivity measuring devices, in particular to a thermal conductivity measuring device for a graphite composite insulation board. Background Art

[0002] Graphite composite insulation board is a new type of insulation material, which combines the excellent thermal conductivity of graphite and the thermal insulation properties of other materials. It is widely used in construction, refrigeration, transportation and other fields. In order to detect the thermal conductivity of graphite composite insulation board, it is necessary to use a thermal conductivity measuring device for measurement.

[0003] An existing thermal conductivity measurement device using a steady-state method calculates the thermal conductivity by setting a constant temperature gradient and measuring the temperature difference and heat flow on both sides after the sample reaches thermal equilibrium. Such a device is provided with a heating unit on the top. When measuring, the graphite composite insulation board to be tested is cut into a size for testing and placed in the heating area of ​​the heating unit. The existing device clamps the graphite composite insulation board to be tested horizontally through a symmetrical horizontal pushing and clamping structure provided on both sides of the heating unit, so that it is close to the heating block of the heating unit. This horizontal straight clamping method requires the graphite composite insulation board to be tested to be clamped horizontally. There are requirements for the size of the graphite insulation composite board. If it does not fit the area of ​​the heating area, the board will be placed crookedly at the beginning, and then in the subsequent straight clamping process, it will be inconvenient to support the board. In this way, the clamping structure will cause damage to the graphite layer of the board when too much force is applied, thus affecting the test result. If too little force is applied, the board to be tested will not fit the heating area well, which will also affect the test result. In summary, the existing steady-state method of thermal conductivity measurement device can only perform detection of single-size boards according to the size of the heating area, and its detection operation is not flexible enough. Therefore, a thermal conductivity measurement device for graphite composite insulation board is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a device for measuring thermal conductivity of a graphite composite insulation board to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a graphite composite insulation board thermal conductivity measuring device, comprising a measuring instrument body, a detection door is provided on the top of the measuring instrument body, and further comprising: A heating unit, the heating unit is arranged on the top of the measuring instrument body and is shielded by the detection door, and protective boxes are arranged on both sides of the heating unit; A bearing mechanism, the bearing mechanism is rotatably connected between the gaps on the opposite sides of the heating unit and the protection box, and the bearing mechanism is used for placing the insulation board to be tested; A locking structure, which is arranged on the top of the carrying mechanism and is used to lock the carrying mechanism at one end of the heating unit close to the detection door; An extrusion structure, wherein a plurality of groups of the extrusion structures are symmetrically arranged at opposite ends of a plurality of protective boxes, and a linkage is arranged between the extrusion structure and the locking structure. The extrusion structure controls the degree of extrusion through the locking structure, and the extrusion structure is used to push the insulation board to be tested toward the center of the heating unit.

[0006] Preferably, an equipment door is provided at the bottom of the measuring instrument body, a control unit for operating and controlling the measuring instrument body is provided at the top of the measuring instrument body and on both sides of the detection door, and an observation window is provided at the top of the detection door.

[0007] Preferably, a heater is provided in the middle of the heating unit, and a plurality of protective boxes are symmetrically arranged on both sides of the heater along the center, the supporting mechanism is used to place the insulation board to be tested on both sides of the heater, and the extrusion structure is used to extrude the insulation board to be tested close to the heater.

[0008] Preferably, the bearing mechanism includes a rotating flap, and a plurality of supporting plates are symmetrically arranged along the center of the bottom of the rotating flap, and the end of the supporting plate close to the rotating flap is rotatably connected to the bottom of the heating unit, and the top of the supporting plate and the side of the rotating flap close to the supporting plate are used to place the insulation plate to be inspected, and a pull block is provided in the middle of the rotating flap close to the detection door, and the locking structure is arranged between the top of the rotating flap and the top of the heating unit.

[0009] Preferably, the locking structure comprises: A locking box, wherein the locking box is fixedly connected to the top of the heating unit, a locking screw hole is provided on a side of the locking box away from the heating unit, and the linkage member is arranged in the locking box; A rotating knob block, wherein the rotating knob block is rotatably inserted and connected to the top of the rotating flap, an extrusion plug is provided at the end of the rotating knob block away from the detection door, an external thread is provided at the end of the extrusion plug close to the rotating flap, and the end of the extrusion plug away from the rotating flap is set to a cone shape, the extrusion plug is threadably inserted and connected with the locking screw hole through the external thread, and the extrusion plug moves through the extrusion linkage to the protective box to adjust the setting angle of the extrusion structure.

[0010] Preferably, a rotating groove is provided on one side of the protection box close to the heating unit, and the extrusion structure includes: A swing rod, wherein a squeezing roller is disposed at the bottom of the swing rod, and an elastic block is disposed on the outer wall of the squeezing roller; The rotating disk is fixedly connected to the top end of the swing rod, and a tooth groove is formed around the outer wall of the rotating disk. The rotating disk rotates through the tooth groove and the linkage member.

[0011] Preferably, a through hole is provided at the top of the protection box and passes through the locking box, one end of the through hole is connected to the top of the rotating groove, the other end of the through hole is connected to the locking screw hole, and the linkage part is slidably connected in the through hole.

[0012] Preferably, the linkage comprises: A sliding rod, wherein the sliding rod is slidably inserted into the insertion hole, and one end of the sliding rod is inserted into the locking screw hole; A toggle gear plate, one end of which is slidably inserted into the insertion hole, one end of which is close to the sliding rod and fixedly connected to it, and one end of which is away from the sliding rod and slidably inserted into the top of the rotating groove, and the tooth side of the toggle gear plate is meshed with the tooth groove of the rotating disk.

[0013] Preferably, a reset groove is provided on the inner wall of the through hole and at the top of the locking box, a movable slider is fixedly connected to the top of the sliding rod, the movable slider is slidably inserted in the reset groove, and a support spring is provided in the reset groove and at one end close to the protection box.

[0014] Preferably, the middle portion of the rotating disk is inserted and connected to the supporting rotating rod, and both ends of the supporting rotating rod are inserted and connected to the top inner wall of the rotating groove along the horizontal longitudinal rotation.

[0015] Technical effects and advantages of the present invention: The present invention adopts an extrusion structure setting for clamping the graphite thermal insulation composite plate to be tested. The extrusion structure of the device adjusts the space of the heating area of ​​the device by rotating and clamping. At the same time, the extrusion structure rotates and clamps from bottom to top in the heating space of the device, so that the skewed plate can be clamped straight, thereby ensuring that the plate to be tested can be closely attached to the heating area for testing. In this way, the device can not only complete the clamping test of plates of various types and sizes, but also ensure the accuracy of the device detection data, making the device more flexible in detection; The device is also provided with a carrying mechanism, which utilizes the rotation of the carrying mechanism to facilitate the placement of the plate to be tested on the heating unit of the device, so that the device can conveniently test plates of various sizes and types. At the same time, a locking structure is provided on the carrying mechanism. The locking structure can not only ensure that the carrying mechanism is locked on the front of the heating unit, but also cooperate with the linkage to adjust the extrusion structure, so that the extrusion structure can be adjusted to the corresponding extrusion angle according to plates of different thicknesses, so that the device can complete the clamping detection of plates of multiple sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a closed front view of the overall structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the overall structure of the detection door after opening of the present invention.

[0019] Figure 4 This is a front view of the overall structure of the detection door of the present invention after it is opened.

[0020] Figure 5 It is a schematic diagram of the structural connection of the heating unit, the bearing mechanism and the locking structure of the present invention.

[0021] Figure 6 It is a front view of the structural connection of the heating unit, the supporting mechanism and the locking structure of the present invention.

[0022] Figure 7 It is a structural schematic diagram of the carrying mechanism of the present invention.

[0023] Figure 8 It is a structural schematic diagram of the extrusion structure of the present invention.

[0024] Fig. 9 It is a structural side view of the extruded structure of the present invention.

[0025] Fig.10 It is a structural front view of the extruded structure of the present invention.

[0026] Fig.11 It is a structural cross-sectional view of the connection between the locking box and the extrusion structure of the present invention.

[0027] In the figure: 1. measuring instrument body; 101. control unit; 2. equipment door; 3. detection door; 301. observation window; 4. heating unit; 401. heater; 5. locking box; 501. locking screw hole; 502. sliding plug rod; 503. toggle gear plate; 504. moving slider; 505. supporting spring; 6. rotating flap; 601. pulling block; 602. rotating knob block; 603. squeezing plug block; 604. supporting plate; 7. protective box; 8. rocker arm; 801. squeezing roller; 802. elastic block; 803. rotating disk; 804. supporting rotating rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The present invention provides Figure 1-11 A graphite composite insulation board thermal conductivity measuring device shown includes a measuring instrument body 1, a detection door 3 is arranged on the top of the measuring instrument body 1, an equipment door 2 is arranged on the bottom of the measuring instrument body 1, a control unit 101 for operating and controlling the measuring instrument body 1 is arranged on the top of the measuring instrument body 1 and on both sides of the detection door 3, and an observation window 301 is arranged on the top of the detection door 3.

[0030] It should be noted that the measuring instrument body 1 designed in this scheme is a DRCD-3030 thermal conductivity measuring instrument. This type of measuring instrument adopts a double-specimen measuring device, and its protective hot plate group includes a heating structure and a cooling structure. The heating structure should be divided into a metering unit in the middle and a protective unit surrounding the metering unit separated by a gap, and equipped with a thermal device. The heating structure adopts a double-heat surface heating machine, and the cold plate and the double hot surface are arranged symmetrically. The space for the moving cold plate is set according to the thickness of the specimen. Under stable conditions, the measuring part in the specimen has a constant heat flow. By measuring the one-dimensional constant heat flow Q flowing through the metering unit under stable conditions, the area A of the metering unit, and the temperature difference T between the cold and hot surfaces of the specimen, the thermal resistance R of the specimen can be calculated. According to the thickness of the specimen, the thermal conductivity value of the specimen can be accurately calculated.

[0031] Also includes: A heating unit 4, which is disposed on the top of the measuring instrument body 1 and is shielded by the detection door 3, and protective boxes 7 are disposed on both sides of the heating unit 4; Specifically, a heater 401 is provided in the middle of the heating unit 4, and a plurality of protective boxes 7 are symmetrically arranged on both sides of the heater 401 along the center. The supporting mechanism is used to place the insulation board to be tested on both sides of the heater 401, and the extrusion structure is used to extrude the insulation board to be tested close to the heater 401.

[0032] The bearing mechanism is rotatably connected between the gaps on the opposite sides of the heating unit 4 and the protection box 7, and is used for placing the insulation board to be tested; Specifically, the supporting mechanism includes a rotating flap 6, and a plurality of supporting plates 604 are symmetrically arranged along the center of the bottom of the rotating flap 6. The end of the supporting plate 604 close to the rotating flap 6 is rotatably connected to the bottom of the heating unit 4. The top of the supporting plate 604 and the side of the rotating flap 6 close to the supporting plate 604 are used to place the insulation plate to be inspected. A pull block 601 is arranged in the middle of the side of the rotating flap 6 close to the inspection door 3, and the locking structure is arranged between the top of the rotating flap 6 and the top of the heating unit 4.

[0033] It should be noted that an empty slot area is opened at one end of the heating unit 4 close to the detection door 3, and the heater 401 is arranged in the middle of the empty slot area. At this time, the empty slot areas on both sides of the heater 401 are the heating areas to be detected, and at the same time, a bracket is opened on the inner wall at the bottom end of the heating area and close to the heater 401. At this time, the supporting plate 604 is rotated and inserted into the bracket. Under such a structural setting, when the graphite composite insulation board to be detected is placed on the top of the supporting plate 604, when the supporting plate 604 is rotated to the same height as the plane at the bottom end of the heating area, the graphite composite insulation board to be detected is rotated into the heating area and waits to be clamped, so as to be close to the heater 401 for heating detection.

[0034] A locking structure, which is arranged on the top of the carrying mechanism and is used to lock the carrying mechanism at one end of the heating unit 4 close to the detection door 3; Specifically, the locking structure includes: A locking box 5, the locking box 5 is fixedly connected to the top of the heating unit 4, a locking screw hole 501 is opened on the side of the locking box 5 away from the heating unit 4, and a linkage member is arranged in the locking box 5; The rotating button block 602 is rotatably inserted and connected to the top of the rotating flap 6. An extrusion plug 603 is provided at the end of the rotating button block 602 away from the detection door 3. An external thread is provided at the end of the extrusion plug 603 close to the rotating flap 6. The end of the extrusion plug 603 away from the rotating flap 6 is set to a cone shape. The extrusion plug 603 is threadedly inserted and connected with the locking screw hole 501 through the external thread. The extrusion plug 603 moves through the extrusion linkage to the protective box 7 to adjust the setting angle of the extrusion structure.

[0035] It should be noted that an internal thread is provided on the inner wall of the hole of the locking screw hole 501 near the end of the detection door 3, so that it can cooperate with the extrusion plug 603. After the extrusion plug 603 is inserted into the locking screw hole 501, the external thread provided at the extrusion plug 603 cooperates with the internal thread of the locking screw hole 501, so that the extrusion plug 603 is threadedly locked to the locking box 5, and the extrusion plug 603 is connected to the rotating flap 6 through the rotating knob block 602, thereby ensuring that the rotating flap 6 closes the end of the heating area near the detection door 3 at the heating unit 4.

[0036] Furthermore, a through hole is opened at the top of the protection box 7 and passes through the locking box 5. One end of the through hole is connected to the top of the rotating groove, and the other end of the through hole is connected to the locking screw hole 501. The linkage part is slidably connected in the through hole.

[0037] An extrusion structure, wherein multiple groups of extrusion structures are symmetrically arranged at opposite ends of multiple protective boxes 7, and a linkage is arranged between the extrusion structure and the locking structure. The extrusion structure controls the degree of extrusion through the locking structure, and the extrusion structure is used to push the insulation board to be tested toward the center of the heating unit 4.

[0038] Specifically, a rotating groove is provided on one side of the protection box 7 close to the heating unit 4, and the extrusion structure includes: A swing rod 8, a squeezing roller 801 is disposed at the bottom of the swing rod 8, and an elastic block 802 is disposed on the outer wall of the squeezing roller 801; The rotating disk 803 is fixedly connected to the top of the swing rod 8. The outer wall of the rotating disk 803 is surrounded by a tooth groove. The rotating disk 803 rotates through the tooth groove and the linkage member. The middle part of the rotating disk 803 is inserted and connected to the supporting rotating rod 804, and the two ends of the supporting rotating rod 804 are inserted and connected to the top inner wall of the rotating groove along the horizontal longitudinal rotation.

[0039] It should be noted that the elastic block 802 is made of fluororubber material, which has excellent high temperature resistance and chemical resistance, and is suitable for use in high temperature and harsh chemical environments. The temperature range is generally -20°C to +200°C. The setting of the elastic block 802 can compensate for the extrusion gap, which can also cooperate with the extrusion roller 801 to follow the rotation of the rocker 8 to complete the extrusion of the graphite composite insulation board to be tested in the heating area.

[0040] Specifically, the linkage parts include: A sliding rod 502, the sliding rod 502 is slidably inserted into the insertion hole, and one end of the sliding rod 502 is inserted into the locking screw hole 501; The toggle gear plate 503 has one end that is slidably inserted into the insertion hole, one end of the toggle gear plate 503 that is close to the sliding rod 502 is fixedly connected to it, and one end of the toggle gear plate 503 that is away from the sliding rod 502 is slidably inserted into the top of the rotating groove, and the tooth side of the toggle gear plate 503 is meshed with the tooth groove of the rotating disk 803.

[0041] It should be noted that since one end of the sliding rod 502 is inserted into the locking screw hole 501, after the extrusion block 603 is inserted into the locking screw hole 501, according to the conical shape of the extrusion block 603, the deeper the extrusion block 603 is inserted into the locking screw hole 501, the larger the diameter of the outer wall thereof becomes, so that the sliding rod 502 is gradually squeezed and moves horizontally away from the locking screw hole 501. At this time, the sliding rod 502 drives the shifting tooth plate 503 to move in the direction close to the protective box 7. At this time, the tooth side of the shifting tooth plate 503 engages with the tooth groove at the rotating disk 803 to drive the rotating disk 803 to rotate. Under the support of the supporting rotating rod 804, the rotating disk 803 drives the swing rod 8 to rotate. At this time, driven by the swing rod 8, the extrusion roller 801 swings in a curve and swings from bottom to top in the direction close to the heater 401, thereby reducing the horizontal lateral space in the heating area.

[0042] Furthermore, a reset groove is provided through the inner wall of the through hole and at the top of the locking box 5, and a movable slider 504 is fixedly connected to the top of the sliding rod 502. The movable slider 504 is slidably connected in the reset groove, and a supporting spring 505 is provided in the reset groove and at one end close to the protective box 7.

[0043] It should be noted that, by setting the movable slider 504, when it moves with the sliding rod 502, the support spring 505 is squeezed. After being compressed, the support spring 505 accumulates potential energy. After the squeezing of the sliding rod 502 is released, the support spring 505 pushes the movable slider 504 to reset, thereby resetting the extrusion structure at the same time. Under such a setting, when the release device is locked, that is, after the extrusion plug 603 is unscrewed, the extrusion structure is reset, and the extrusion of the squeezed graphite composite insulation board is released, thereby making it easy to take out the insulation board after inspection.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for measuring thermal conductivity of a graphite composite insulation board, comprising a measuring instrument body (1), wherein a detection door (3) is provided on the top of the measuring instrument body (1), characterized in that: Also includes: A heating unit (4), the heating unit (4) being arranged on the top of the measuring instrument body (1) and shielded by the detection door (3), and protective boxes (7) being arranged on both sides of the heating unit (4); A bearing mechanism, the bearing mechanism being rotatably connected between the gap on the opposite side of the heating unit (4) and the protection box (7), and the bearing mechanism being used for placing the insulation board to be tested; A locking structure, the locking structure being arranged on the top of the supporting mechanism, the locking structure being used to lock the supporting mechanism at one end of the heating unit (4) close to the detection door (3); An extrusion structure, wherein a plurality of groups of the extrusion structures are symmetrically arranged at opposite ends of a plurality of protection boxes (7), and a linkage is arranged between the extrusion structure and the locking structure. The extrusion structure controls the degree of extrusion through the locking structure, and the extrusion structure is used to push the insulation board to be tested toward the center of the heating unit (4).

2. A graphite composite insulation board thermal conductivity measuring device according to claim 1, characterized in that: The bottom of the measuring instrument body (1) is provided with an equipment door (2), the top of the measuring instrument body (1) and on both sides of the detection door (3) are provided with a control unit (101) for operating and controlling the measuring instrument body (1), and the top of the detection door (3) is provided with an observation window (301).

3. A graphite composite insulation board thermal conductivity measuring device according to claim 1, characterized in that: A heater (401) is arranged in the middle of the heating unit (4), a plurality of the protective boxes (7) are symmetrically arranged on both sides of the heater (401) along the center, the supporting mechanism is used to place the insulation board to be tested on both sides of the heater (401), and the extrusion structure is used to extrude the insulation board to be tested close to the heater (401).

4. A graphite composite insulation board thermal conductivity measuring device according to claim 3, characterized in that: The bearing mechanism comprises a rotating flap (6), a plurality of supporting plates (604) are symmetrically arranged along the center of the bottom of the rotating flap (6), one end of the supporting plate (604) close to the rotating flap (6) is rotatably connected to the bottom of the heating unit (4), a portion between the top of the supporting plate (604) and a side of the rotating flap (6) close to the supporting plate (604) is used to place a heat-insulating plate to be tested, a pull block (601) is arranged in the middle of a side of the rotating flap (6) close to the testing door (3), and the locking structure is arranged between the top of the rotating flap (6) and the top of the heating unit (4).

5. A graphite composite insulation board thermal conductivity measuring device according to claim 4, characterized in that: The locking structure comprises: A locking box (5), the locking box (5) being fixedly connected to the top of the heating unit (4), a locking screw hole (501) being provided on a side of the locking box (5) away from the heating unit (4), and the linkage member being arranged in the locking box (5); A rotating knob block (602) is rotatably inserted and connected to the top of the rotating flap (6); an extrusion plug (603) is provided at one end of the rotating knob block (602) away from the detection door (3); an external thread is provided at one end of the extrusion plug (603) close to the rotating flap (6); an end of the extrusion plug (603) away from the rotating flap (6) is configured to be conical; the extrusion plug (603) is threadably inserted and connected to the locking screw hole (501) via the external thread; the extrusion plug (603) is moved through the extrusion linkage member to the protective box (7) to adjust the setting angle of the extrusion structure.

6. A graphite composite insulation board thermal conductivity measuring device according to claim 5, characterized in that: A rotating groove is provided on a side of the protection box (7) close to the heating unit (4), and the extrusion structure comprises: A swing rod (8), wherein a squeezing roller (801) is provided at the bottom of the swing rod (8), and an elastic block (802) is provided on the outer wall of the squeezing roller (801); A rotating disk (803) is fixedly connected to the top end of the swing rod (8); a tooth groove is formed around the outer wall of the rotating disk (803); and the rotating disk (803) rotates by means of the tooth groove and the linkage member.

7. A graphite composite insulation board thermal conductivity measuring device according to claim 6, characterized in that: A through hole is provided at the top of the protection box (7) and passes through the locking box (5); one end of the through hole is connected to the top of the rotating groove; the other end of the through hole is connected to the locking screw hole (501); and the linkage member is slidably connected in the through hole.

8. A graphite composite insulation board thermal conductivity measuring device according to claim 7, characterized in that: The linkage comprises: A sliding rod (502), the sliding rod (502) is slidably inserted and connected in the insertion through hole, and one end of the sliding rod (502) is inserted and connected in the locking screw hole (501); A toggle tooth plate (503) is slidably inserted into the insertion hole at one end of the toggle tooth plate (503), and one end of the toggle tooth plate (503) close to the sliding rod (502) is fixedly connected thereto, and one end of the toggle tooth plate (503) away from the sliding rod (502) is slidably inserted into the top of the rotating groove, and the tooth side of the toggle tooth plate (503) is meshed with the tooth groove of the rotating disk (803).

9. A graphite composite insulation board thermal conductivity measuring device according to claim 8, characterized in that: A reset groove is provided on the inner wall of the through hole and at the top of the locking box (5); a movable slider (504) is fixedly connected to the top of the sliding rod (502); the movable slider (504) is slidably inserted in the reset groove; a supporting spring (505) is provided in the reset groove and at one end close to the protection box (7).

10. A graphite composite insulation board thermal conductivity measuring device according to claim 6, characterized in that: The middle portion of the rotating disk (803) is connected to the supporting rotating rod (804) through an insertion, and both ends of the supporting rotating rod (804) are connected to the top inner wall of the rotating groove in a horizontal and longitudinal rotational manner through an insertion.

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