Manual climbing device for large-tank type manual chamber detection

Abstract

The invention discloses a manual climbing device for large-tank type manual chamber detection, the device is used for enabling a worker to climb to a designated position when the gas storage chamber wall and a high sealing layer are checked manually, the device comprises a ring beam, a sliding driving mechanism, a guide mechanism, a guide rail chain mechanism and a manned cabin lifting mechanism, and after a gas storage is operated, the ring beam is driven by the sliding driving mechanism to move up to the designated position. When large hoisting equipment cannot enter the gas storage and cannot enter the gas storage through the large hoisting equipment, the manual climbing device can be used for manually inspecting the cavern wall and the sealing layer of the gas storage aiming at the oversized and ultrahigh structure, so that manual inspection can be conveniently carried out.

Description

Technical Field

[0001] The invention relates to the technical field of building auxiliary equipment, and in particular to an artificial climbing device used for detecting a large tank type artificial chamber. Background Art

[0002] With the deepening of the construction of new power systems, the demand for new energy storage with long cycle, high safety and physical rotational inertia is becoming more and more urgent. Compressed air energy storage is gaining increasing attention due to its excellent comprehensive performance.

[0003] Compressed-Air Energy Storage (CAES) refers to a storage method that uses electrical energy to compress air during the low-load period of the power grid, seals the air at high pressure in an underground artificial chamber, and releases the compressed air to drive the steam turbine to generate electricity during the peak load period of the power grid.

[0004] By storing compressed air, the load rate of the power grid can be improved, the economy can be improved, the load fluctuation of large generator sets in the system can be reduced, and the reliability can be improved. Compared with pumped storage power stations, the site selection of compressed air energy storage stations is flexible, there is no need to build ground reservoirs, and the terrain conditions are easy to meet. The compressor is driven by an electric motor powered by the power grid, so the output power of the steam turbine is all used for power generation, and its power generation capacity is three times that of a conventional gas turbine power station. At the same time, since a large amount of energy is stored in the air and heat exchanger, it has a high energy density compared with pumped storage power stations. The compressed air energy storage power station can be used instantly after the compressed air is compressed, and it can be started even without lighting conditions and the startup is fast. It can reach the rated output from no load in 3 minutes, which improves the flexibility of the system.

[0005] According to the shape of the gas storage, underground artificial chamber gas storage is divided into two types: tunnel type and large tank type. Its structure from outside to inside is surrounding rock, concrete lining and sealing layer. The surrounding rock and lining are the force-bearing structures when the gas storage is pressurized, and the sealing layer is the sealing structure when the gas storage is pressurized. Frequent inflation and deflation of the gas storage will affect the stress state of the concrete lining and the sealing performance of the sealing layer. Therefore, it is necessary to regularly test the structural stress and sealing performance of the gas storage to ensure the airtightness of the sealing layer and the stress characteristics of the concrete lining.

[0006] The diameter of a large tank-type artificial cavern gas storage is often more than 40m and the height is more than 80m. Once the gas storage is in operation, large hoisting equipment cannot enter the gas storage, and large lifting equipment cannot enter. For such super-large and super-high structures, it is particularly important to use manual inspections of the gas storage cavern walls and sealing layers. Therefore, there is an urgent need for a climbing device that can be used in underground large tank-type artificial cavern gas storage to facilitate manual inspections. Summary of the invention

[0007] The main purpose of the present invention is to provide a solution to the problem of how to carry out manual inspection of the wall and sealing layer of a gas storage reservoir.

[0008] To achieve the above purpose, one of the technical solutions adopted by the present invention is: an artificial climbing device for large tank type artificial chamber detection, which is used to manually climb to a designated position when manually inspecting the wall of the gas storage chamber and the sealing layer at a high place, and the device includes:

[0009] Ring beam 1, which is installed at the top of the vertical wall of the chamber;

[0010] A sliding drive mechanism 2, which is installed on the ring beam 1 and is used to drive the artificial climbing device to perform circular motion on the ring beam 1;

[0011] A guide mechanism 3, which is mounted on the sliding drive mechanism 2;

[0012] The guide rail chain mechanism 4 is installed on the guide mechanism 3, and the guide rail chain mechanism 4 moves up and down through the drive of the guide mechanism 3;

[0013] A manned cabin lifting mechanism 5, which is installed on one side of the guide rail chain mechanism 4, and the manned cabin lifting mechanism 5 can move up and down along the length direction of the guide rail chain mechanism 4;

[0014] Among them, the guide chain mechanism 4 realizes up and down movement in the chamber, the manned cabin lifting mechanism 5 moves up and down on the guide chain, and the guide chain mechanism 4 realizes circular motion. The manned cabin lifting mechanism 5 can reach any position in the chamber, realizing manual maintenance work at any position.

[0015] Furthermore, the ring beam 1 is a circular beam having a circular track.

[0016] Furthermore, the sliding drive mechanism 2 comprises:

[0017] A driving frame 201, which is located on the ring beam 1;

[0018] At least two positioning wheels 202, which are located on the inner side of the driving frame 201;

[0019] At least two sets of driving wheel mechanisms 203, used to drive the driving frame 201 to perform circular motion along the ring beam 1;

[0020] The driving frame 201 is installed on the ring beam 1 by clamping the positioning wheel 202 on the circular track of the ring beam 1 .

[0021] Furthermore, the driving wheel mechanism 203 includes:

[0022] A travel motor 2031, which is mounted on the driving frame 201;

[0023] The pulley driving wheel 2032 is mounted on the upper end of the driving frame 201;

[0024] A pulley driven wheel 2033, which is mounted on the lower end of the driving frame 201;

[0025] The travel motor 2031 is connected to the pulley driving wheel 2032 via a pulley 2034 , so that the travel motor 2031 drives the pulley driving wheel 2032 .

[0026] Furthermore, the guiding mechanism 3 comprises:

[0027] A guide seat 301, which is fixedly mounted on the driving frame 201;

[0028] A main motor 302, which is fixedly mounted on the guide seat 301;

[0029] The lifting gear 303 is mounted on the driving frame 201, and the lifting gear 303 is a gear with bevel teeth on the side surface;

[0030] The rotating end of the main motor 302 meshes with the bevel teeth of the lifting gear 303 to form a bevel gear drive;

[0031] A through slot is formed on one side of the guide seat 301 .

[0032] Furthermore, the guide rail chain mechanism 4 includes:

[0033] At least two main rods 401; the main rod 401 has a pin rod 402 on one side close to the guide mechanism 3, the main rod 401 is provided with a T-shaped through slot 403 along the length direction, and the main rod 401 is provided with a positioning hole 404 along the length direction on one side close to the manned cabin lifting mechanism 5;

[0034] At least one set of connecting rod mechanism 405; two adjacent main rods 401 are connected by the connecting rod mechanism 405;

[0035] Wherein, the guide rail chain mechanism 4 is located in the through groove of the guide seat 301;

[0036] The lifting teeth 303 and the pin rod 402 are meshed with each other.

[0037] Furthermore, the connecting rod mechanism 405 includes:

[0038] At least two connecting rods 4051 are arranged in parallel; both ends of the connecting rod 4051 are respectively hinged to the main rod 401; a plurality of long pins 4052 parallel to each other are arranged between the two parallel connecting rods 4051;

[0039] At least four hinged rods 4053, two of which are arranged in parallel; one end of each two hinged rods 4053 is hingedly connected to each other, and the other end thereof is hingedly connected to the main rod 401; an arc-shaped guide plate 4056 is provided at the hinge of the two hinged rods 4053;

[0040] A connecting ring 4054, which is located at the hinge of every two hinged rods 4053, and is used to facilitate the bending of the guide rail chain mechanism 4;

[0041] A positioning rod 4055 is installed between the connecting rod 4051 and the hinge rod 4053, one end of which is fixedly installed on the connecting rod 4051 and the other end is installed in the connecting ring 4054;

[0042] The lifting teeth 303 and the long pin 4052 are meshed with each other.

[0043] Furthermore, the manned cabin lifting mechanism 5 comprises:

[0044] A hoisting motor seat 501, which is mounted on the connecting rod 4051 at the top;

[0045] A hoisting motor 502, which is mounted on a hoisting motor base 501;

[0046] A guide pin 503, which is located in the T-shaped through slot 403 of the main rod 401;

[0047] The passenger cabin 504 is used to carry passengers; a connecting fixing rod 505 and a safety pin 506 are provided on one side of the passenger cabin 504 close to the guide rail chain mechanism 4;

[0048] The steel wire rope on the hoisting motor 502 is connected to one end of the guide pin 503; the connecting fixing rod 505 is connected to the middle part of the guide pin 503;

[0049] The hoisting motor 502 drives the guide pin 503 to move up and down in the T-shaped slot 403, so that the manned cabin moves up and down on the guide chain mechanism 4;

[0050] When the guide rail chain mechanism 4 is bent, the arc-shaped guide plate 4056 can assist the guide rail chain mechanism 4 in passing;

[0051] When the manned cabin 504 reaches the designated position, the guide pin 503 is inserted into the positioning hole 404 of the main rod 401 .

[0052] Furthermore, the device also includes a hydraulic safety latch 6 for ensuring that the device does not slide down due to its own weight after the sliding drive mechanism 2 fails.

[0053] Furthermore, scale lines are provided at the arc end of the connecting rod 4051 and the hinge end of the hinge rod 4053, and when manual adjustment is performed, the angle can be achieved through the scale lines.

[0054] Compared with the prior art, the present invention has the following beneficial effects:

[0055] When the gas storage reservoir is in operation, large hoisting equipment cannot enter the interior of the gas storage reservoir, and large lifting equipment cannot be used to enter. For such super-large and super-high structures, the artificial climbing device of the present invention can be used to manually inspect the walls and sealing layers of the gas storage reservoir, so as to facilitate manual inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a structural schematic diagram of the artificial climbing device for large tank type artificial chamber detection of the present invention;

[0057] Figure 2 It is a structural schematic diagram of the sliding drive mechanism of the present invention;

[0058] Figure 3 It is a structural schematic diagram of the guide mechanism of the present invention;

[0059] Figure 4 It is a structural schematic diagram of the guide rail chain mechanism of the present invention;

[0060] Figure 5 It is a rear view of the guide rail chain mechanism of the present invention;

[0061] Figure 6 It is a structural schematic diagram of the manned cabin lifting mechanism of the present invention;

[0062] Figure 7 A schematic diagram of the position of the guide pin of the present invention;

[0063] Figure 8 It is a schematic structural diagram of the lifting gear of the present invention.

[0064] In the figure: 1, ring beam; 2, sliding drive mechanism; 201, driving frame; 202, positioning wheel; 203, driving wheel mechanism; 2031, travel motor; 2032, pulley driving wheel; 2033, pulley driven wheel;

[0065] 3. Guide mechanism; 301. Guide seat; 302. Main motor; 303. Lifting gear;

[0066] 4. Guide rail chain mechanism; 401. Main rod; 402. Pin rod; 403. T-shaped through slot; 404. Positioning hole; 405. Link mechanism; 4051. Link; 4052. Long pin; 4053. Articulated rod; 4054. Connecting ring; 4055. Positioning rod; 4056. Arc guide plate;

[0067] 5. Manned cabin lifting mechanism; 501. Winch motor seat; 502. Winch motor; 503. Guide pin; 504. Manned cabin; 505. Connecting fixing rod; 506. Safety pin;

[0068] 6. Hydraulic safety latch. DETAILED DESCRIPTION

[0069] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0070] like Figure 1 As shown, an artificial climbing device for large tank-type artificial chamber inspection is used to manually climb to a designated position when inspecting the wall of the gas storage chamber and the sealing layer at a high place. The device includes:

[0071] Ring beam 1, which is installed at the top of the vertical wall of the chamber;

[0072] Specifically, further, the ring beam 1 is a circular beam with a circular track.

[0073] like Figure 2 As shown, the sliding drive mechanism 2 is installed on the ring beam 1 and is used to drive the artificial climbing device to perform circular motion on the ring beam 1;

[0074] Specifically, the sliding drive mechanism 2 includes:

[0075] A driving frame 201, which is located on the ring beam 1;

[0076] At least two positioning wheels 202, which are located on the inner side of the driving frame 201;

[0077] At least two sets of driving wheel mechanisms 203, used to drive the driving frame 201 to perform circular motion along the ring beam 1;

[0078] The driving frame 201 is installed on the ring beam 1 by clamping the positioning wheel 202 on the circular track of the ring beam 1 .

[0079] like Figure 3 As shown, the guide mechanism 3 is mounted on the sliding drive mechanism 2;

[0080] Furthermore, the guiding mechanism 3 comprises:

[0081] A guide seat 301, which is fixedly mounted on the driving frame 201;

[0082] A main motor 302, which is fixedly mounted on the guide seat 301;

[0083] like Figure 8As shown, the lifting gear 303 is mounted on the driving frame 201, and the lifting gear 303 is a gear with bevel teeth on the side surface;

[0084] The rotating end of the main motor 302 meshes with the bevel teeth of the lifting gear 303 to form a bevel gear drive;

[0085] A through slot is formed on one side of the guide seat 301 .

[0086] like Figure 4-5 As shown, the guide rail chain mechanism 4 is installed on the guide mechanism 3, and the guide rail chain mechanism 4 moves up and down through the drive of the guide mechanism 3;

[0087] Furthermore, the guide rail chain mechanism 4 includes:

[0088] At least two main rods 401; the main rod 401 has a pin rod 402 on one side close to the guide mechanism 3, the main rod 401 is provided with a T-shaped through slot 403 along the length direction, and the main rod 401 is provided with a positioning hole 404 along the length direction on one side close to the manned cabin lifting mechanism 5;

[0089] At least one set of connecting rod mechanism 405; two adjacent main rods 401 are connected by the connecting rod mechanism 405;

[0090] Wherein, the guide rail chain mechanism 4 is located in the through groove of the guide seat 301;

[0091] The lifting teeth 303 and the pin rod 402 are meshed with each other.

[0092] Furthermore, the connecting rod mechanism 405 includes:

[0093] At least two connecting rods 4051 are arranged in parallel; both ends of the connecting rod 4051 are respectively hinged to the main rod 401; a plurality of long pins 4052 parallel to each other are arranged between the two parallel connecting rods 4051;

[0094] At least four hinged rods 4053, two of which are arranged in parallel; one end of each two hinged rods 4053 is hingedly connected to each other, and the other end thereof is hingedly connected to the main rod 401; an arc-shaped guide plate 4056 is provided at the hinge of the two hinged rods 4053;

[0095] A connecting ring 4054, which is located at the hinge of every two hinged rods 4053, and is used to facilitate the bending of the guide rail chain mechanism 4;

[0096] A positioning rod 4055 is installed between the connecting rod 4051 and the hinge rod 4053, one end of which is fixedly installed on the connecting rod 4051 and the other end is installed in the connecting ring 4054;

[0097] Specifically, the positioning rod can be a bolt and a nut that are manually tightened or a motor positioning rod can be used to adjust the bolt and the nut, so as to achieve the switching between bending and straightening of the equipment.

[0098] The lifting teeth 303 and the long pin 4052 are meshed with each other.

[0099] like Figure 6-7 As shown, the manned cabin lifting mechanism 5 is installed on one side of the guide rail chain mechanism 4, and the manned cabin lifting mechanism 5 can move up and down along the length direction of the guide rail chain mechanism 4;

[0100] Among them, the guide chain mechanism 4 realizes up and down movement in the chamber, the manned cabin lifting mechanism 5 moves up and down on the guide chain, and the guide chain mechanism 4 realizes circular motion. The manned cabin lifting mechanism 5 can reach any position in the chamber, realizing manual maintenance work at any position.

[0101] Furthermore, the manned cabin lifting mechanism 5 comprises:

[0102] A hoisting motor seat 501, which is mounted on the connecting rod 4051 at the top;

[0103] A hoisting motor 502, which is mounted on a hoisting motor base 501;

[0104] A guide pin 503, which is located in the T-shaped through slot 403 of the main rod 401;

[0105] The passenger cabin 504 is used to carry passengers; a connecting fixing rod 505 and a safety pin 506 are provided on one side of the passenger cabin 504 close to the guide rail chain mechanism 4;

[0106] The steel wire rope on the hoisting motor 502 is connected to one end of the guide pin 503; the connecting fixing rod 505 is connected to the middle part of the guide pin 503;

[0107] The hoisting motor 502 drives the guide pin 503 to move up and down in the T-shaped slot 403, so that the manned cabin moves up and down on the guide chain mechanism 4;

[0108] When the guide rail chain mechanism 4 is bent, the arc-shaped guide plate 4056 can assist the guide rail chain mechanism 4 in passing;

[0109] When the manned cabin 504 reaches the designated position, the guide pin 503 is inserted into the positioning hole 404 of the main rod 401 .

[0110] Furthermore, the device also includes a hydraulic safety latch 6 for ensuring that the device does not slide down due to its own weight after the sliding drive mechanism 2 fails.

[0111] Furthermore, scale lines are provided at the arc end of the connecting rod 4051 and the hinge end of the hinge rod 4053, and when manual adjustment is performed, the angle can be achieved through the scale lines.

[0112] Its working process is:

[0113] When the gas storage is in operation, large hoisting equipment cannot enter the gas storage, and large lifting equipment cannot enter, the appropriate ring beam can be installed on the top of the gas storage wall, and then the driving frame of the sliding drive mechanism is clamped on the circular track of the ring beam, and the travel motor is turned on to drive the entire device to move along the circular track to reach the specified position;

[0114] Then turn on the main motor in the guide mechanism to rotate the lifting gear, so that the guide chain mechanism can move up and down until it reaches the specified height;

[0115] Finally, turn on the winch motor of the manned cabin lifting mechanism to drive the guide pin to move up and down along the T-shaped slot, and then drive the manned cabin to move up and down along the guide chain mechanism. When the manned cabin reaches the designated position, the safety pin can be inserted into the positioning hole to achieve safety protection.

[0116] For such super-large and super-high structures, the artificial climbing device of the present invention can be used to carry out manual inspections on the walls and sealing layers of the gas storage tanks, so as to facilitate manual inspections.

[0117] At the same time, this set of devices can ensure that the angles of the articulated rod and the upper and lower main rods are consistent. Therefore, it is only necessary to ensure that the position of the positioning rod screw or all scales remain consistent to ensure that the guide chain mechanism is in a bent state. The bending arc has the same curvature radius, or different curvature radii can be achieved according to the internal shape of the chamber.

[0118] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An artificial climbing device for large tank-type artificial chamber detection, characterized in that: The device is used to manually inspect the wall and the sealing layer at a high place of the gas storage reservoir, so that the person can climb to the designated position. The device includes: A ring beam (1) is installed at the top of the vertical wall of the chamber; A sliding drive mechanism (2) is mounted on the ring beam (1) and is used to drive the artificial climbing device to perform circular motion on the ring beam (1); A guide mechanism (3) mounted on the sliding drive mechanism (2); A guide rail chain mechanism (4) is installed on the guide mechanism (3), and the guide rail chain mechanism (4) moves up and down through the drive of the guide mechanism (3); A manned cabin lifting mechanism (5) is installed on one side of the guide rail chain mechanism (4), and the manned cabin lifting mechanism (5) can move up and down along the length direction of the guide rail chain mechanism (4); The guide rail chain mechanism (4) realizes up and down movement in the chamber, the manned cabin lifting mechanism (5) moves up and down on the guide rail chain, and the guide rail chain mechanism (4) realizes circular movement. The manned cabin lifting mechanism (5) can reach any position in the chamber, thereby realizing manual maintenance work at any position.

2. The artificial climbing device for large tank type artificial chamber detection according to claim 1 is characterized in that: The ring beam (1) is a circular beam having a circular track.

3. The artificial climbing device for large tank type artificial chamber detection according to claim 2 is characterized in that: The sliding drive mechanism (2) comprises: A driving frame (201) located on the ring beam (1); At least two positioning wheels (202) located on the inner side of the driving frame (201); At least two sets of driving wheel mechanisms (203) for driving the driving frame (201) to perform circular motion along the ring beam (1); The drive frame (201) is installed on the ring beam (1) by clamping the positioning wheel (202) on the circular track of the ring beam (1).

4. The artificial climbing device for large tank type artificial chamber detection according to claim 3 is characterized in that: The driving wheel mechanism (203) comprises: A travel motor (2031), which is mounted on the drive frame (201); A pulley driving wheel (2032) mounted on the upper end of the driving frame (201); A pulley driven wheel (2033) mounted on the lower end of the driving frame (201); The travel motor (2031) is connected to the pulley driving wheel (2032) via a belt pulley (2034), so that the travel motor (2031) drives the pulley driving wheel (2032).

5. The artificial climbing device for large tank type artificial chamber detection according to claim 3 is characterized in that: The guiding mechanism (3) comprises: A guide seat (301) fixedly mounted on the driving frame (201); A main motor (302) is fixedly mounted on the guide seat (301); A lifting gear (303) is installed on the driving frame (201), and the lifting gear (303) is a gear with bevel teeth on the side surface; Wherein, the rotating end of the main motor (302) meshes with the bevel teeth of the lifting gear (303) to form a bevel gear drive; A through groove is formed on one side of the guide seat (301).

6. The artificial climbing device for large tank type artificial chamber detection according to claim 5 is characterized in that: The guide rail chain mechanism (4) comprises: At least two main rods (401); a pin rod (402) is provided on one side of the main rod (401) close to the guide mechanism (3); a T-shaped through slot (403) is provided on the main rod (401) along the length direction; and a positioning hole (404) is provided on one side of the main rod (401) close to the manned cabin lifting mechanism (5); At least one set of connecting rod mechanisms (405); two adjacent main rods (401) are connected via the connecting rod mechanisms (405); Wherein, the guide rail chain mechanism (4) is located in the through groove of the guide seat (301); The lifting teeth (303) and the pin rod (402) are meshed with each other.

7. The artificial climbing device for large tank type artificial chamber detection according to claim 6 is characterized in that: The connecting rod mechanism (405) comprises: At least two connecting rods (4051) are arranged in parallel; both ends of the connecting rods (4051) are respectively hinged to the main rod (401); a plurality of mutually parallel long pins (4052) are arranged between the two parallel connecting rods (4051); At least four hinged rods (4053), two of which are arranged in parallel; one end of each of the two hinged rods (4053) is hingedly connected to each other, and the other end is hingedly connected to the main rod (401); an arc-shaped guide plate (4056) is provided at the hinge of the two hinged rods (4053); A connecting ring (4054) located at the hinge of every two hinged rods (4053) for facilitating the bending of the guide rail chain mechanism (4); A positioning rod (4055) is installed between the connecting rod (4051) and the hinge rod (4053), one end of which is fixedly installed on the connecting rod (4051) and the other end of which is installed in the connecting ring (4054); The lifting teeth (303) and the long pin (4052) are meshed with each other.

8. The artificial climbing device for large tank type artificial chamber detection according to claim 7 is characterized in that: The manned cabin lifting mechanism (5) comprises: A winch motor seat (501) is mounted on the connecting rod (4051) at the top; A hoisting motor (502), which is mounted on the hoisting motor base (501); A guide pin (503) located in the T-shaped through slot (403) of the main rod (401); A manned cabin (504) is used to carry people; a connecting fixing rod (505) and a safety pin (506) are provided on one side of the manned cabin (504) close to the guide rail chain mechanism (4); The steel wire rope on the hoisting motor (502) is connected to one end of the guide pin (503); the connecting fixing rod (505) is connected to the middle part of the guide pin (503); The hoisting motor (502) drives the guide pin (503) to move up and down in the T-shaped slot (403), so that the manned cabin moves in the up and down directions on the guide chain mechanism (4); When the guide rail chain mechanism (4) is bent, the arrangement of the arc-shaped guide plate (4056) can assist the guide rail chain mechanism (4) in passing; When the manned cabin (504) reaches the designated position, the guide pin (503) is inserted into the positioning hole (404) of the main rod (401).

9. The artificial climbing device for large tank type artificial chamber detection according to claim 1 is characterized in that: The device also includes a hydraulic safety latch (6) for ensuring that the device will not slide down due to its own weight after the sliding drive mechanism (2) fails.

10. The artificial climbing device for large tank type artificial chamber detection according to claim 1, characterized in that: Graduation lines are provided at the arc end of the connecting rod (4051) and the hinge end of the hinge rod (4053), and when manual adjustment is performed, the angle can be achieved through the graduations.

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