Perpendicularity detection tool for highway engineering supervision

Abstract

The invention discloses a perpendicularity detection tool for highway engineering supervision, and relates to the technical field of perpendicularity detection, the perpendicularity detection tool comprises three upper support arms, push-pull displacement devices are arranged between adjacent upper support arms, arm storage cavities are formed in the upper support arms, and lower support arms are slidably arranged in the arm storage cavities; a locking mechanism is arranged at the joint of the upper supporting arm and the lower supporting arm, the lower supporting arm is provided with a limiting fillet matched with a groove in the arm storage cavity, two vertical columns of multiple threaded grooves are evenly formed in the side wall of the lower supporting arm in the vertical direction, a stabilizing base is fixedly arranged at the bottom of the lower supporting arm, a groove is formed in the inner side of the stabilizing base, and the lower supporting arm is fixedly connected with the stabilizing base. And a replaceable supporting mechanism is arranged in the groove. The push-pull displacement device can be well installed on the upper supporting arm through the upper supporting arm in the shape of the regular hexagonal prism, the lower supporting arm is locked through the locking mechanism, a relatively fixed position relation is conveniently formed between the upper supporting arm and the lower supporting arm, and the limiting fillets on the lower supporting arm play a limiting role.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of perpendicularity detection, and specifically relates to a perpendicularity detection tool for highway engineering supervision. BACKGROUND

[0002] Highway perpendicularity detection is a detection process of the verticality of a highway pavement, and is mainly used for evaluating the quality of road design and construction to ensure the comfort and safety of highway driving. The detection method usually measures the longitudinal and transverse deviations of the pavement by using high-precision instruments and equipment, such as a laser flatness meter and a three-dimensional laser scanner. By measuring the verticality differences at different positions on the pavement, it can be reflected whether the pavement meets the design standards during the construction process. The deviation of the highway perpendicularity will directly affect the stability of vehicle driving, and may cause car vibration, damage or discomfort to the driver in severe cases. Therefore, perpendicularity detection is an important part of highway maintenance work. The detection data usually includes longitudinal concave-convex, transverse deviation and local unevenness of the pavement, and the detection results will be analyzed to form a report to provide a basis for later repair and maintenance.

[0003] The invention disclosed in the authorized publication No. CN116907437B discloses a highway construction pavement slope detection device. The invention uses gravity to make the dial and the measuring pointer self-adaptively adjust the vertical state, adjust the relative position of the gravity of the fine adjustment slider on the sunshade, control the moment size on both sides of the sunshade, and then fine-tune the levelness of the sunshade and the perpendicularity of the dial, to improve the accuracy of the reading.

[0004] The above-mentioned device can detect the slope of the highway pavement, but the dial in the device is in the vertical direction. Due to the ups and downs of the pavement, it is impossible to ensure that the dial surface is always in the vertical state, which will affect the measurement of the highway slope. Therefore, a detection device is needed that can observe the scale without being affected by external forces. In addition, a device is needed that can directly detect the verticality of the highway, and has only a few transmission mechanisms to reduce detection errors and achieve fast and accurate detection of the verticality of the highway. The device can adapt to most highway measurements, such as large ups and downs of the pavement, and can combine mechanical measurement and electronic measurement to further improve the accuracy of the device in detecting the verticality of the highway. SUMMARY

[0005] The present application aims to provide a perpendicularity detection tool for highway engineering supervision to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions: The utility model provides a verticality detection tool for highway engineering supervision, including three upper branch arms, is provided with push -and -pull displacement device between adjacent upper branch arms, the upper branch arm is opened in and has the lower branch arm of slidingly arranged in the arm cavity, the upper branch arm and lower branch arm junction are provided with locking mechanism, the lower branch arm has the limiting batten of groove cooperation arrangement in the arm cavity on, the lower branch arm side wall is evenly opened with two vertical columns a plurality of thread grooves along the vertical direction, the lower branch arm bottom is fixedly provided with stabilizing seat, the inboard of stabilizing seat is opened with the recess, the recess is provided with replaceable support mechanism in, through telescopic control device and is connected two lower branch arms and telescopic control device both ends are fixedly installed in the same height's thread groove, the telescopic control device is provided with verticality display device on, The verticality display device includes a supporting plate, a plurality of stepped grooves are evenly formed around the geometric center point of the lower end surface of the supporting plate, a second limiting slider is slidably arranged in the stepped groove, a guide column is fixedly arranged below the second limiting slider, the inner wall of the stepped groove is connected with the second limiting slider by a spring, a spherical transparent display shell is fixedly arranged at the geometric center of the upper surface of the supporting plate, and the inside of the spherical transparent display shell is filled with a colored fluorescent solution.

[0007] As a further scheme of the present application: a scale is arranged on the side wall of the lower branch arm in cooperation with the thread groove.

[0008] As a further scheme of the present application: the upper branch arm is in the shape of a regular hexagonal prism, and the supporting plate is in the shape of an equilateral triangle.

[0009] As a further scheme of the present application: the colored fluorescent solution has a liquid level height in the spherical transparent display shell that is at the horizontal plane of the spherical center.

[0010] As a further scheme of the present application: a circular scale is evenly arranged on the inner wall of the spherical transparent display shell.

[0011] As a further scheme of the present application: a corrosion-resistant transparent coating is coated on the inner wall of the spherical transparent display shell.

[0012] As a further scheme of the present application: the push-pull displacement device includes a first rotating seat, the first rotating seat is fixedly arranged at the bottom of the upper branch arm, a push rod is arranged on the first rotating seat, the push rods in the same vertical plane are rotatably hingedly connected through rotating shafts, a second rotating seat is fixedly arranged at the outer end of the push rod, vertical limiting grooves are formed in the adjacent two side surfaces of the upper branch arm, a first limiting slider is slidably arranged in the vertical limiting groove, and the outer end surface of the first limiting slider is fixedly connected with the second rotating seat, a fixed block is fixedly arranged at the bottom of the outer side of the upper branch arm, the axis of the upper branch arm is perpendicular to the plane of the fixed block, and a first level is arranged on the fixed block.

[0013] As a further scheme of the present application: the telescopic control device comprises a bidirectional telescopic rod, the two ends of the bidirectional telescopic rod are respectively provided with a third rotating seat, and the third rotating seat is screw-mounted in a threaded groove.

[0014] As a further scheme of the present application: the locking mechanism comprises a sleeve, the sleeve is sleeved and mounted on the outer side of the lower supporting arm, a thread is arranged on the outer wall of the sleeve, and a nut is screw-mounted on the sleeve.

[0015] As a further scheme of the present application: a fixing plate is arranged above the three upper supporting arms, a plurality of grooves corresponding to the upper supporting arms are formed in the lower end surface of the fixing plate, an electric push rod is embedded and mounted on the top of the upper supporting arm, a rotating disc is arranged above the fixing plate, the rotating disc is provided with a locking mechanism, a perpendicularity measuring instrument is arranged above the rotating disc, and a second level meter is embedded and mounted on the fixing plate on one side of the rotating disc.

[0016] Compared with the prior art, the present application has the following advantages: The upper supporting arm in the shape of a regular hexagonal prism allows the push-pull displacement device to be well mounted on the upper supporting arm (the three upper supporting arm shafts are respectively the three vertices of an equilateral triangle, which facilitates the push-pull displacement device to adjust the opening degree between the three upper supporting arms and maintains the three upper supporting arms in an equilateral triangle shape, thereby facilitating subsequent measurement of the verticality of the road and improving the stability of the device), the locking mechanism locks the lower supporting arm, which facilitates the upper supporting arm and the lower supporting arm to form a relatively fixed positional relationship, the limiting strip on the lower supporting arm plays a limiting role, so that the lower supporting arm can only move vertically along the long axis of the upper supporting arm, avoiding rotation of the lower supporting arm and facilitating installation and operation of the telescopic control device, and improving the use efficiency of the device. By limiting and adjusting the push rod around the first rotating seat and the rotating shaft, the second rotating seat and the first limiting slider are displaced up and down in the vertical limiting groove, so that the three upper supporting arms are expanded or contracted around the geometric center point of the equilateral triangle formed thereby, which facilitates subsequent detection of the verticality of the road, the first level meter can ensure that the upper supporting arm is in a vertical state, and the lower supporting arm is also in a vertical state, thereby improving the accuracy of the device in detecting the verticality of the road. The plurality of guide columns allow the supporting plate to be placed above the telescopic control device and avoid the supporting plate from sliding downward, the second limiting slider and the spring cooperate to allow the guide column to be displaced, thereby making it more convenient to place the supporting plate above the telescopic control device, the contact point between the highest point of the liquid surface in the spherical transparent display housing and the scale on the inner wall of the spherical transparent display housing is the verticality of the road, which is convenient for intuitive observation, the colored fluorescent solution in the spherical transparent display housing can adapt to the measurement of the verticality of the road at night, thereby increasing the application range of the device. The levelness of the fixed plate is detected by the second level meter, the levelness of the fixed plate is adjusted by the electric push rod, the fixed plate is in the horizontal state, the rotating disc drives the perpendicularity measuring instrument to rotate, the annular multi-angle is convenient for detecting the perpendicularity of the road, and the use efficiency of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional structure schematic view of the present application.

[0018] Figure 2 It is a front view structure schematic view of the present application.

[0019] Figure 3 It is a partial three-dimensional structure schematic view of the present application.

[0020] Figure 4 It is a partial three-dimensional structure schematic view of the present application.

[0021] Figure 5 It is a sectional structure schematic view of the upper supporting arm in the present application.

[0022] Figure 6 It is an explosion view of the upper supporting arm in the present application.

[0023] Figure 7 It is a partial three-dimensional structure schematic view of the perpendicularity display device in the present application.

[0024] Figure 8 It is a three-dimensional structure schematic view when the present application is used.

[0025] Figure 9 It is another three-dimensional structure schematic view of the present application.

[0026] Legend: 1, upper supporting arm; 11, vertical limiting groove; 12, arm storage cavity; 2, push-pull displacement device; 21, first rotating seat; 22, push rod; 23, rotating shaft; 24, second rotating seat; 25, first limiting sliding block; 26, fixed block; 27, first level meter; 3, lower supporting arm; 31, screw groove; 32, stabilizing seat; 4, replaceable supporting mechanism; 5, telescopic control device; 51, third rotating seat; 52, bidirectional telescopic rod; 6, locking mechanism; 61, outer sleeve; 62, nut; 7, perpendicularity display device; 71, supporting plate; 72, stepped groove; 73, second limiting sliding block; 74, guide column; 75, spring; 76, spherical transparent display shell; 8, fixed plate; 81, second level meter; 9, rotating disc; 10, perpendicularity measuring instrument. DETAILED DESCRIPTION

[0027] The present application will be described in detail below with reference to the drawings. In the drawings or description, similar or identical parts are designated by the same reference numerals, and in practical applications, the shape, thickness, or height of each component can be enlarged or reduced. The embodiments listed in the present application are only used to illustrate the present application and are not intended to limit the scope of the present application. Any obvious modification or change made to the present application does not depart from the spirit and scope of the present application. Embodiment 1

[0028] Please refer to Figures 1-8 In the embodiment of the present application, a verticality detection tool for highway engineering supervision includes three upper arms 1, the upper arms 1 are shaped as regular hexagonal prisms, a push-pull displacement device 2 is arranged between adjacent upper arms 1, an arm storage cavity 12 is formed in the upper arm 1, a lower arm 3 is slidably arranged in the arm storage cavity 12, a locking mechanism 6 is arranged at the connection between the upper arm 1 and the lower arm 3, the lower arm 3 is provided with a limiting rib matched with a groove in the arm storage cavity 12, a plurality of threaded grooves 31 are evenly formed in the vertical direction on the side wall of the lower arm 3, a scale matched with the threaded grooves 31 is arranged on the side wall of the lower arm 3, a stabilizing seat 32 is fixedly arranged at the bottom of the lower arm 3, a groove is formed in the inner side of the stabilizing seat 32, a replaceable supporting mechanism 4 is arranged in the groove, the replaceable supporting mechanism 4 can be a universal wheel, a conical nail, a three-claw supporting frame, etc., two lower arms 3 are connected through a telescopic control device 5, and the telescopic control device 5 is threadedly installed at both ends in the threaded grooves 31 at the same height, a verticality display device 7 is arranged on the telescopic control device 5, the push-pull displacement device 2 can be well installed on the upper arm 1 through the regular hexagonal prism-shaped upper arm 1 (the three shaft centers of the three upper arms 1 are respectively three vertices of an equilateral triangle, which facilitates the adjustment of the opening degree between the three upper arms 1 by the push-pull displacement device 2, and the linkage control of the three push-pull displacement devices 2 still maintains the three upper arms 1 as an equilateral triangle, thereby facilitating the subsequent measurement of the verticality of the road and improving the stability of the device), the locking mechanism 6 locks the lower arm 3, which facilitates the formation of a relatively fixed positional relationship between the upper arm 1 and the lower arm 3, the limiting rib on the lower arm 3 plays a limiting role, so that the lower arm 3 can only move vertically along the long axis direction of the upper arm 1, the rotation of the lower arm 3 is avoided, and the installation and operation of the telescopic control device 5 are facilitated, thereby improving the use efficiency of the device.

[0029] The push-pull displacement device 2 comprises a first rotating seat 21 fixedly arranged at the bottom of the upper support arm 1, a push rod 22 arranged on the first rotating seat 21, the push rod 22 in the same vertical plane being rotatably hingedly installed through a rotating shaft 23, a second rotating seat 24 fixedly arranged at the outer end of the push rod 22, a vertical limiting slot 11 formed on the adjacent two side surfaces of the upper support arm 1, a first limiting sliding block 25 slidably arranged in the vertical limiting slot 11 and fixedly connected with the second rotating seat 24 at the outer end surface, a fixed block 26 fixedly arranged at the bottom of the outer side of the upper support arm 1, the axis of the upper support arm 1 being perpendicular to the plane of the fixed block 26, and a first level meter 27 arranged on the fixed block 26, the push rod 22 being adjusted around the first rotating seat 21 and the rotating shaft 23, the second rotating seat 24 and the first limiting sliding block 25 being displaced up and down in the vertical limiting slot 11, so that the three upper support arms 1 are expanded or contracted around the geometric center point of the equilateral triangle formed thereby, facilitating subsequent detection of the verticality of the road, and the first level meter 27 can ensure that the upper support arm 1 is in a vertical state, and the lower support arm 3 is also in a vertical state, thereby improving the accuracy of the road verticality detection device.

[0030] The telescopic control device 5 comprises a bidirectional telescopic rod 52, both ends of the bidirectional telescopic rod 52 being respectively provided with a third rotating seat 51, the third rotating seat 51 being threadedly installed in the threaded groove 31, the locking mechanism 6 comprising an outer sleeve 61, the outer sleeve 61 being sleevedly installed on the outer side of the lower support arm 3, the outer wall of the outer sleeve 61 being provided with a thread, and a nut 62 being threadedly installed on the outer sleeve 61.

[0031] The verticality display device 7 comprises a support plate 71, the support plate 71 is shaped as an equilateral triangle, a plurality of stepped grooves 72 are uniformly arranged on the lower end surface of the support plate 71 around the geometric center point of the support plate 71, a second limiting sliding block 73 is slidably arranged in the stepped groove 72, a guide column 74 is fixedly arranged below the second limiting sliding block 73, the inner wall of the stepped groove 72 and the second limiting sliding block 73 are connected through a spring 75, a spherical transparent display shell 76 is fixedly arranged at the geometric center of the upper surface of the support plate 71, the inside of the spherical transparent display shell 76 is filled with colored fluorescent solution, the liquid level of the colored fluorescent solution in the spherical transparent display shell 76 is a horizontal plane at the ball center, circular scales are uniformly arranged on the inner wall of the spherical transparent display shell 76, a corrosion-resistant transparent coating is coated on the inner wall of the spherical transparent display shell 76, the support plate 71 is placed above the telescopic control device 5 through the guide columns 74, and the support plate 71 is prevented from sliding downward, the second limiting sliding block 73 and the spring 75 cooperate to enable the guide column 74 to displace, thereby being more convenient to place above the telescopic control device 5, the contact point between the highest point of the liquid level in the spherical transparent display shell 76 and the scale on the inner wall of the spherical transparent display shell 76 is the verticality of the road, which is convenient for intuitive observation, the colored fluorescent solution in the spherical transparent display shell 76 can adapt to the measurement of the verticality of the road at night, and the use range of the device is increased.

[0032] When the device is used, one of the upper supporting arms 1 is pulled, the push rod 22 is adjusted in the limiting direction around the first rotating seat 21 and the rotating shaft 23, the second rotating seat 24 and the first limiting sliding block 25 are displaced up and down in the vertical limiting groove 11, the three upper supporting arms 1 are expanded or contracted around the geometric center point where the three upper supporting arms 1 form an equilateral triangle, when the size to be measured is reached, the replaceable supporting mechanism 4 is installed below the stabilizing seat 32, (when the soft foundation pavement is encountered, the replaceable supporting mechanism 4 may be embedded in the ground, and the stabilizing seat 32 plays a supporting and stabilizing role), the nut 62 is loosened, the lower supporting arm 3 is lowered to a length in contact with the ground, the nut 62 is preliminarily locked, a relative fixed positional relationship between the upper supporting arm 1 and the lower supporting arm 3 is formed, the above operation is repeated, the three upper supporting arms 1 are in the same state, the upper supporting arm 1 is adjusted to be vertical through the first level meter 27 on the upper supporting arm 1, then the telescopic control device 5 is screwedly installed in the threaded groove 31 at the same height (that is, the scales on the three lower supporting arms 3 are the same), the plane formed by the three telescopic control devices 5 is parallel to the plane of the road to be detected, then the support plate 71 is placed on the three telescopic control devices 5, the state of the liquid level in the spherical transparent display shell 76 is directly observed, the contact point between the highest point of the liquid level in the spherical transparent display shell 76 and the scale on the inner wall of the spherical transparent display shell 76 is the verticality of the road, and then the measurement work of the verticality of the road is completed. Example 2

[0033] Please refer toFigure 9 On the basis of embodiment 1, three upper supporting arms 1 are provided with a fixed plate 8, and a plurality of grooves corresponding to the upper supporting arms 1 are formed in the lower end surface of the fixed plate 8, an electric push rod is embedded and installed at the top of the upper supporting arm 1, a rotating disc 9 is arranged above the fixed plate 8, the rotating disc 9 is provided with a locking mechanism, a perpendicularity measuring instrument 10 is arranged above the rotating disc 9, and a second level 81 is embedded and installed on one side of the rotating disc 9 on the fixed plate 8, the horizontal degree of the fixed plate 8 is detected through the second level 81, the horizontal degree of the fixed plate 8 is adjusted by the electric push rod, so that the fixed plate 8 is in a horizontal state, the rotating disc 9 drives the perpendicularity measuring instrument 10 to rotate, which is convenient for detecting the perpendicularity of the highway in a ring-shaped multi-angle mode, and the use efficiency of the device is improved.

[0034] When the device is used, the three upper supporting arms 1 are opened to the size that fits the grooves in the lower end surface of the fixed plate 8, then the fixed plate 8 is installed above the three upper supporting arms 1, the overall height of the device is adjusted first, so that the perpendicularity measuring instrument 10 is at a comfortable operating height, then the verticality of the three upper supporting arms 1 is adjusted, so that the upper supporting arms 1 are in a vertical state, then the fixed plate 8 is leveled according to the second level 81, so that the fixed plate 8 is in a horizontal state, and finally the highway is detected through the perpendicularity measuring instrument 10.

[0035] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalents of the elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be considered as limiting the claims involved.

[0036] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A verticality detection tool for highway engineering supervision, comprising three upper arms (1), characterized in that: A push-pull displacement device (2) is provided between adjacent upper arms (1), an arm storage cavity (12) is provided in the upper arm (1), a lower arm (3) is slidably provided in the arm storage cavity (12), a locking mechanism (6) is provided at the connection between the upper arm (1) and the lower arm (3), the lower arm (3) has a limiting strip arranged in cooperation with the groove in the arm storage cavity (12), the side wall of the lower arm (3) is evenly provided with two vertical rows of multiple thread grooves (31) in the vertical direction, a stabilizing seat (32) is fixedly provided at the bottom of the lower arm (3), a groove is provided on the inner side of the stabilizing seat (32), a replaceable support mechanism (4) is provided in the groove, the two lower arms (3) are connected by a telescopic control device (5), and both ends of the telescopic control device (5) are threadedly installed in the thread grooves (31) at the same height, and a verticality display device (7) is provided on the telescopic control device (5); The verticality display device (7) includes a supporting plate (71), a lower end surface of the supporting plate (71) is evenly provided with a plurality of stepped grooves (72) around the geometric center point of the supporting plate (71), a second limiting slider (73) is slidably arranged in the stepped groove (72), a guide column (74) is fixedly arranged below the second limiting slider (73), and the inner wall of the stepped groove (72) is connected to the second limiting slider (73) by a spring (75), and a spherical transparent display shell (76) is fixedly arranged at the geometric center of the upper surface of the supporting plate (71), and the inner side of the spherical transparent display shell (76) is filled with a colored fluorescent solution.

2. The verticality detection tool for highway engineering supervision according to claim 1 is characterized in that: A scale matching the thread groove (31) is provided on the side wall of the lower support arm (3).

3. The verticality detection tool for highway engineering supervision according to claim 1 is characterized in that: The upper support arm (1) is in the shape of a regular hexagonal prism, and the support plate (71) is in the shape of an equilateral triangle.

4. The verticality detection tool for highway engineering supervision according to claim 2 is characterized in that: The liquid level of the colored fluorescent solution in the spherical transparent display shell (76) is the horizontal plane at the center of the sphere.

5. The verticality detection tool for highway engineering supervision according to claim 4 is characterized in that: Circular scales are evenly arranged on the inner wall of the spherical transparent display housing (76).

6. The verticality detection tool for highway engineering supervision according to claim 5, characterized in that: The inner wall of the spherical transparent display housing (76) is coated with a corrosion-resistant transparent coating.

7. The verticality detection tool for highway engineering supervision according to claim 6, characterized in that: The push-pull displacement device (2) includes a first rotating seat (21), the first rotating seat (21) is fixedly arranged at the bottom of the upper support arm (1), a push rod (22) is arranged on the first rotating seat (21), the push rods (22) located on the same vertical plane are rotatably hinged and installed through a rotating shaft (23), and a second rotating seat (24) is fixedly arranged on the outer end of the push rod (22), and vertical limit grooves (11) are opened on two adjacent side surfaces of the upper support arm (1), a first limit slider (25) is slidably arranged in the vertical limit groove (11), and the outer end surface of the first limit slider (25) is fixedly connected to the second rotating seat (24), a fixed block (26) is fixedly arranged on the outer bottom of the upper support arm (1), the axis of the upper support arm (1) is perpendicular to the plane of the fixed block (26), and a first level (27) is arranged on the fixed block (26).

8. The verticality detection tool for highway engineering supervision according to claim 7, characterized in that: The telescopic control device (5) comprises a bidirectional telescopic rod (52), and third rotating seats (51) are respectively installed at both ends of the bidirectional telescopic rod (52), and the third rotating seat (51) is threadedly installed in the thread groove (31).

9. The verticality detection tool for highway engineering supervision according to claim 8, characterized in that: The locking mechanism (6) comprises a jacket (61), the jacket (61) being sleeved and mounted on the outside of the lower support arm (3), the outer wall of the jacket (61) being provided with a thread, and a nut (62) being threadedly mounted on the jacket (61).

10. The verticality detection tool for highway engineering supervision according to any one of claims 1 to 9, characterized in that: A fixing plate (8) is provided above the three upper arms (1), and a plurality of grooves corresponding to the upper arms (1) are provided on the lower end surface of the fixing plate (8). An electric push rod is embedded in the top of the upper arm (1). A turntable (9) is provided above the fixing plate (8), and the turntable (9) has a locking mechanism. A verticality measuring instrument (10) is provided above the turntable (9), and a second level (81) is embedded and installed on one side of the turntable (9) located on the fixing plate (8).

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