Mobile cable installation guide equipment for photovoltaic power station

Abstract

The utility model provides a mobile cable installation guiding device for a photovoltaic power station, and belongs to the field of photovoltaic power stations. Comprising a guide disc, a cable main body can be inserted in a cable opening, a first wire inserting groove is formed in the guide disc, the first wire inserting groove is matched with the cable opening for use, a take-up groove is further formed in the guide disc, the cable opening is communicated with the take-up groove, a take-up assembly is arranged in the take-up groove, and the take-up assembly can perform a wire arrangement action on the cable main body. By arranging the guide disc, the cable port, the multiple sets of take-up grooves and the multiple sets of take-up assemblies, when the guide disc is used for assisting installation of cable bodies, the multiple sets of cable bodies can be carried at a time to climb on a photovoltaic solar panel to conduct cable installation operation, the carrying mode is simple, the cable bodies are convenient to store, operation can be conducted by one person, and the working efficiency is improved; and meanwhile, the take-up assembly can arrange the cable main bodies inserted into the guide disc, so that the situation that the cable main bodies are tied together and are inconvenient to unfasten is reduced.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic power stations, and more specifically, to a mobile cable installation guide device for photovoltaic power stations. Background Art

[0002] A photovoltaic power station is a power station that uses solar photovoltaic panels to directly convert sunlight energy into electrical energy. It is an important part of renewable energy and has the advantages of being clean, environmentally friendly and sustainable.

[0003] During the installation phase of a photovoltaic power station, cables are needed to connect the photovoltaic solar panels to the photovoltaic power station to complete power transmission. In large concentrated rice fields, photovoltaic solar panels are usually set at a horizontal height of half a meter to one and a half meters above the water surface in order to better absorb solar energy. After the autumn harvest of the rice fields, when the water level in the fields is drained to an extremely low standard, the horizontal height of the solar panels can reach two to two and a half meters. At this time, cable installers need to use tools to climb to the position of the solar panels to install the cables. Since a solar panel requires the installation of multiple cables, and the cables are long and inconvenient to carry, cable installers usually only carry one or two cables for installation. Each time there are not enough cables, additional staff are required to deliver them, resulting in low work efficiency. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a mobile cable installation guide device for a photovoltaic power station.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A mobile cable installation and guiding device for a photovoltaic power station includes a guide tray, a cable port is fixedly installed on the outer surface of the guide tray, a cable body can be inserted into the interior of the cable port, a first wire insertion groove is provided inside the guide tray, and the first wire insertion groove is used in conjunction with the cable port, a wire collection groove is also provided inside the guide tray, the cable port is connected to the wire collection groove, a wire collection assembly is provided inside the wire collection groove, and the wire collection assembly can perform a wire management action on the cable body.

[0007] Optionally, the wire taking-up assembly includes a threaded rod fixedly mounted on the inner wall of the wire taking-up groove, the outer surface of the threaded rod is movably sleeved with a sleeve, and the sleeve can be rotated by a thread on the surface of the threaded rod, the inner wall of the sleeve is provided with a barrel groove, and a slide barrel is slidably provided in the barrel groove, and the inner wall of the barrel groove is symmetrically provided with two guide grooves, and two guide plates are symmetrically fixedly mounted on the outer surface of the slide barrel, and the slide barrel can slide through the guiding action of the guide plates and the guide grooves, and the outer surface of the sleeve is provided with a wire management groove for winding the cable body, a baffle is fixedly mounted at one end of the wire management groove, and a rotating groove is provided at the bottom end of the wire taking-up groove, and a positioning ring is rotatably mounted in the rotating groove, and the positioning ring is fixedly connected to the bottom end of the slide barrel.

[0008] Optionally, the end of the slide cylinder used to connect to the swivel is a positioning ring, and a coil spring is fixedly sleeved on the outer surface of the positioning ring, and the outermost end of the coil spring is fixedly connected to the inner wall of the wire take-up groove.

[0009] Optionally, a locking assembly is provided inside the cable port, and the locking assembly is used in conjunction with a coil spring. A second wire insertion slot connected to the first wire insertion slot is provided inside the cable port, and the cable body can be inserted into the second wire insertion slot. A circle of spring groove is provided on the inner wall of the cable port, and the locking assembly includes a tension spring fixedly connected to the inner wall of the top end of the spring slot, and the bottom of the tension spring is fixedly connected to the outer arc plate, and the outer arc plate is slidably set in the spring slot, and the inner wall of the outer arc plate is fixedly connected to the straight plate, and the outer arc plate is fixedly connected to the inner arc plate through the straight plate. A sliding groove is provided on the inner wall of the second wire insertion slot, and the inner arc plate is slidably set in the sliding groove, and the sliding groove is connected to the spring groove, and the straight plate can slide at the connection between the sliding groove and the spring groove.

[0010] Optionally, the outer arc plates, straight plates and inner arc plates are provided in multiple groups, and the spring groove is an annular groove, and the inner diameter of the spring groove gradually decreases from bottom to top.

[0011] Optionally, the diameter of the cable body is the same as the inner diameter of the second wire insertion slot. When the inner arc plate slides to the highest point, it can squeeze the cable body. The inner wall of the top of the inner arc plate is rounded. When the inner arc plate slides to the lowest point, it contacts the outer wall of the cable body and generates friction.

[0012] Optionally, the tension spring is initially in a stretched state in the spring slot.

[0013] Optionally, the wire management trough is spirally designed, and the spiral pattern of the wire management trough is the same as the thread on the surface of the threaded rod. The thread on the surface of the threaded rod can move the sleeve in the direction away from the swivel. The first wire insertion trough is used in conjunction with the baffle. The wire taking-up assembly is provided in multiple groups, and each group of wire taking-up assemblies is equidistantly arranged around the circumference with the center part of the guide disk as the center.

[0014] Compared with the prior art, the technical solution provided by this utility model has at least the following beneficial effects:

[0015] In the above scheme, by setting a guide tray, a cable port, multiple sets of wire taking-up troughs and multiple sets of wire taking-up components, when using the guide tray to assist in the installation of the cable body, multiple sets of cable bodies can be carried at one time to climb up the photovoltaic solar panel to perform cable installation operations. The carrying method is simple, the cable body is easy to store, and one person can operate it, which improves work efficiency. At the same time, the wire taking-up component can organize the cable body inserted into the guide tray, reducing the situation where the cable body is tied together and inconvenient to untie.

[0016] Through the locking assembly and the winding spring, when the cable installer accidentally slips and causes the cable body to fall, the cable body will not extend outward from the second wire trough, reducing the occurrence of the entire guide tray falling to the ground. The cable installer can lift the guide tray along the cable body and continue to use it, which provides convenience for the cable installer during the installation process. At the same time, after the cable body is installed in the guide tray, it can avoid the cable body from popping out of the guide tray when not in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and enable those skilled in the relevant art to make and use the invention.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a cross-sectional view of the internal structure of the guide disc of the present invention when the wire is inserted;

[0020] Figure 3 This is an exploded view of the structure of the take-up assembly of the present invention;

[0021] Figure 4 This is a front cross-sectional view of the sleeve of the present utility model;

[0022] Figure 5 This is an exploded view of the locking assembly of the present invention.

[0023] [Reference Signs]

[0024] 1. Guide plate; 2. Cable port; 3. Cable body; 4. Wire take-up trough; 5. Wire take-up assembly; 6. Locking assembly; 11. First wire insertion trough; 21. Second wire insertion trough; 22. Slide groove; 23. Spring groove; 41. Rotating groove; 51. Threaded rod; 52. Sleeve; 53. Cylinder groove; 54. Guide groove; 55. Slide cylinder; 56. Guide plate; 57. Positioning ring; 58. Rotating ring; 59. Coil spring; 511. Baffle; 521. Wire management trough; 61. Tension spring; 62. Outer arc plate; 63. Straight plate; 64. Inner arc plate.

[0025] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, devices and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It is also noted that, in order to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement the invention for some known technologies. Furthermore, the accompanying drawings are only for the purpose of describing the embodiments in more detail and are not intended to limit the present invention in any specific manner.

[0027] It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment will include such specific features, structures, or characteristics. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0028] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0029] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” means not only “directly on” something but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0030] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.

[0031] like Figures 1 to 5 As shown, an embodiment of the utility model provides a mobile cable installation and guiding device for a photovoltaic power station, including a guide plate 1, a cable port 2 is fixedly installed on the outer surface of the guide plate 1, a cable body 3 can be inserted inside the cable port 2, a first wire insertion groove 11 is provided inside the guide plate 1, and the first wire insertion groove 11 is used in conjunction with the cable port 2, a wire collection groove 4 is also provided inside the guide plate 1, the cable port 2 is connected to the wire collection groove 4, a wire collection component 5 is provided inside the wire collection groove 4, and the wire collection component 5 can perform wire management actions on the cable body 3.

[0032] The wire taking-up assembly 5 includes a threaded rod 51 fixedly mounted on the inner wall of the wire taking-up groove 4. The outer surface of the threaded rod 51 is movably sleeved with a sleeve 52, which can be rotated by the threaded surface of the threaded rod 51. The inner wall of the sleeve 52 is provided with a barrel groove 53, and a slide 55 is slidably provided in the barrel groove 53. The inner wall of the barrel groove 53 is symmetrically provided with two guide grooves 54. The outer surface of the slide 55 is symmetrically fixed with two guide plates 56. The slide 55 can slide through the guiding action of the guide plates 56 and the guide grooves 54. The outer surface of the sleeve 52 is provided with a wire management groove 521 for winding the cable body 3. A baffle 511 is fixedly mounted on one end of the wire management groove 521. A rotating groove 41 is provided at the bottom end of the wire taking-up groove 4. A positioning ring 57 is rotatably installed in the rotating groove 41, and the positioning ring 57 is fixedly connected to the bottom end of the slide 55.

[0033] The end of the slide 55 for connecting to the swivel 58 is a positioning ring 57 , and a coil spring 59 is fixedly sleeved on the outer surface of the positioning ring 57 , and the outermost end of the coil spring 59 is fixedly connected to the inner wall of the wire take-up groove 4 .

[0034] The wire management groove 521 is spirally designed, and the spiral pattern of the wire management groove 521 is the same as the thread on the surface of the threaded rod 51. The thread on the surface of the threaded rod 51 can move the sleeve 52 in the direction away from the swivel 58. The first wire insertion groove 11 is used in conjunction with the baffle 511. There are multiple groups of wire take-up assemblies 5, and each group of wire take-up assemblies 5 is equidistantly arranged around the center of the guide disk 1.

[0035] Before climbing onto the photovoltaic solar panel, the cable installer inserts the cable body 3 into the cable port 2, and then gradually inserts the cable body 3 into the guide disc 1. The cable body 3 enters the wire receiving groove 4 through the first wire insertion groove 11 and contacts the baffle 511 on the sleeve 52. The cable body 3 pushes the baffle 511 to rotate the sleeve 52, and the sleeve 52 rotates along the direction of the threaded rod 51. As the sleeve 52 rotates, the cable body 3 is rolled up in the wire management groove 521 of the sleeve 52 until only a small section of the cable body 3 leaks out of the cable port 2, and the cable is then installed. The cable body 3 is installed by filling the other several receiving grooves 4 on the guide disc 1 with the cable body 3 in accordance with the above method. The cable installer then carries the entire guide disc 1 and climbs up the photovoltaic solar panel for installation. At this time, the cable body 3 leaking out of the cable port 2 can be pulled out of the guide disc 1 for installation. Then, the guide disc 1 is pulled to pull the cable body 3 in the receiving groove 4 out. When installing the photovoltaic solar panel, multiple cable bodies 3 can be carried at one time. The carrying method is simple, the cable bodies 3 are convenient to store, and one person can operate it, thereby improving work efficiency.

[0036] In order to make the guide plate 1 reusable and save costs, the cable body 3 is inserted into the guide plate 1, and the sleeve 52 is formed in the process of the cable body 3 being wound in the wire groove 521. Figure 3 As shown in the figure, the sleeve 52 rotates clockwise along the threaded rod 51 and moves toward the left side of the threaded rod 51. When the sleeve 52 rotates, the sleeve 52 will rotate with the slide 55 through the internal guide groove 54. At the same time, since the swivel 58 can only rotate in the rotating groove 41, the swivel 58 and the slide 55 are limited by the rotating groove 41 and cannot rotate with the sleeve 52. Figure 3 As shown in FIG, the coil spring 59 moves to the left, so that the coil spring 59 begins to expand steadily. Due to the elasticity of the coil spring 59 itself, the coil spring 59 will assist the slide 55 to do the following when the cable installer pulls out the cable body 3. Figure 3 The counterclockwise rotation shown in the figure enables the cable installer to more easily pull the cable body 3 out of the guide tray 1. At the same time, the take-up assembly 5 can organize the cable body 3 inserted into the guide tray 1, reducing the situation where the cable body 3 is tied together and inconvenient to untie.

[0037] like Figure 2 and Figure 5As shown, the cable port 2 is provided with a locking assembly 6 inside, which is used in conjunction with the coil spring 59. The cable port 2 is provided with a second wire insertion slot 21 connected to the first wire insertion slot 11. The cable body 3 can be inserted into the second wire insertion slot 21. The inner wall of the cable port 2 is provided with a circle of spring slot 23. The locking assembly 6 includes a tension spring 61 fixedly connected to the inner wall of the top end of the spring slot 23. The bottom of the tension spring 61 is fixedly connected to the outer arc plate 62. The outer arc plate 62 is slidably set in the spring slot 23. The inner wall of the outer arc plate 62 is fixedly connected to the straight plate 63. The outer arc plate 62 is fixedly connected to the inner arc plate 64 through the straight plate 63. The inner wall of the second wire insertion slot 21 is provided with a slide groove 22. The inner arc plate 64 is slidably set in the slide groove 22. The slide groove 22 is connected to the spring groove 23. The straight plate 63 can slide at the connection between the slide groove 22 and the spring groove 23.

[0038] The outer arc plates 62 , the straight plates 63 and the inner arc plates 64 are provided in multiple groups, and the spring groove 23 is an annular groove, and the inner diameter of the spring groove 23 gradually decreases from bottom to top.

[0039] The diameter of the cable body 3 is the same as the inner diameter of the second wire insertion slot 21. When the inner arc plate 64 slides to the highest point, it can squeeze the cable body 3. The inner wall of the top of the inner arc plate 64 is rounded. When the inner arc plate 64 slides to the lowest point, it contacts the outer wall of the cable body 3 and generates friction.

[0040] The tension spring 61 is initially in a stretched state in the spring slot 23 .

[0041] When the cable body 3 is inserted into the guide disk 1, due to the action of the coil spring 59, the cable body 3 will move upward along the direction of the cable port 2 and leave the wire collection groove 4. When the cable body 3 moves upward, the inner arc plate 64 can squeeze the cable body 3 when it slides to the highest point. The tension spring 61 is initially in a stretched state in the spring groove 23. The multiple groups of inner arc plates 64 located in the slide groove 22 will squeeze and clamp the cable body 3, preventing it from moving upward, thereby avoiding the cable body 3 from popping out of the guide disk 1 when the cable body 3 is not in use.

[0042] When the cable body 3 is inserted into the guide tray 1, the cable body 3 will move downward in the spring groove 23 with the outer arc plate 62, the straight plate 63 and the inner arc plate 64. Since the inner diameter of the spring groove 23 gradually decreases from bottom to top, the outer arc plate 62 will move downward with the inner arc plate 64 through the straight plate 63 during the process of sliding downward in the spring groove 23. The pressure of multiple groups of inner arc plates 64 on the cable body 3 gradually decreases, thereby gradually loosening the cable body 3, and the operation of installing the cable body 3 in the guide tray 1 is also easier and more convenient.

[0043] At the same time, when the cable installer climbs onto the photovoltaic solar panel to use the guide tray 1 to install the cable body 3, if he accidentally slips and causes the cable body 3 to fall, at this time, since one end of the cable body 3 is fixed on the photovoltaic solar panel, the guide tray 1 with the cable body 3 will hang down due to gravity. At this time, due to the action of the locking assembly 6, the cable body 3 will not extend outward from the second wire insertion slot 21, reducing the occurrence of the entire guide tray 1 falling to the ground. The cable installer can lift the guide tray 1 along the cable body 3 and continue to use it, which provides convenience for the cable installer during the installation process.

[0044] It should be noted that the elastic force of the coil spring 59 is smaller than the friction force on the cable body 3 when the inner arc plate 64 is at the highest point, and the elastic force of the coil spring 59 is larger than the gravity of the guide disk 1 when the guide disk 1 is fully counterweighted.

[0045] The workflow of the utility model technical solution is as follows:

[0046] Before climbing onto the photovoltaic solar panel, the cable installer inserts the cable body 3 into the cable port 2 and gradually inserts the cable body 3 into the guide disk 1. The cable body 3 enters the wire receiving slot 4 through the first wire insertion slot 11 and contacts the baffle 511 on the sleeve 52. The cable body 3 pushes the baffle 511 to rotate the sleeve 52, and the sleeve 52 rotates along the direction of the threaded rod 51. As the sleeve 52 rotates, the cable body 3 will be rolled up in the wire management slot 521 of the sleeve 52 until only a small section of the cable body 3 leaks out of the cable port 2, and the installation of the cable body 3 is completed.

[0047] In accordance with the above method, the other several receiving grooves 4 on the guide disc 1 are filled with cable bodies 3, and the cable installer then installs the entire guide disc 1 on the photovoltaic solar panel. At this time, the cable body 3 leaking out of the cable port 2 can be pulled out of the guide disc 1 for installation, and then the guide disc 1 is pulled to pull the cable body 3 in the receiving groove 4. When installing the photovoltaic solar panel, multiple cable bodies 3 can be carried at one time. The carrying method is simple, the cable bodies 3 are easy to store, and one person can operate it, thereby improving work efficiency.

[0048] This invention encompasses any alternatives, modifications, equivalents, and solutions that do not depart from the spirit and scope of this invention. To provide a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments of this invention, but those skilled in the art will be able to fully understand this invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A mobile cable installation guide device for a photovoltaic power station, comprising a guide plate, a cable port fixedly mounted on the outer surface of the guide plate, and a cable body inserted into the interior of the cable port; characterized in that: A first wire insertion slot is provided inside the guide tray, and the first wire insertion slot is used in conjunction with the cable port. A wire collection slot is also provided inside the guide tray, and the cable port is connected to the wire collection slot. A wire collection assembly is provided inside the wire collection slot, and the wire collection assembly can organize the cable body.

2. The mobile cable installation guide device for photovoltaic power station according to claim 1, characterized in that: The wire-taking assembly includes a threaded rod fixedly mounted on the inner wall of the wire-taking groove, the outer surface of the threaded rod is movably sleeved with a sleeve, and the sleeve can be rotated by a thread on the surface of the threaded rod, the inner wall of the sleeve is provided with a barrel groove, and a slide barrel is slidably provided in the barrel groove, and the inner wall of the barrel groove is symmetrically provided with two guide grooves, and two guide plates are symmetrically fixedly mounted on the outer surface of the slide barrel, and the slide barrel can slide through the guiding action of the guide plates and the guide grooves, and the outer surface of the sleeve is provided with a wire management groove for winding the cable main body, a baffle is fixedly mounted at one end of the wire management groove, and a rotating groove is provided at the bottom end of the wire-taking groove, and a positioning ring is rotatably mounted in the rotating groove, and the positioning ring is fixedly connected to the bottom end of the slide barrel.

3. The mobile cable installation guide device for photovoltaic power station according to claim 2, characterized in that: The end of the slide cylinder used to connect the swivel is a positioning ring, and a coil spring is fixedly sleeved on the outer surface of the positioning ring. The outermost end of the coil spring is fixedly connected to the inner wall of the wire take-up groove.

4. The mobile cable installation guide device for photovoltaic power station according to claim 3, characterized in that: A locking assembly is provided inside the cable port, and the locking assembly is used in conjunction with a coil spring. A second wire insertion slot connected to the first wire insertion slot is provided inside the cable port, and the cable body can be inserted into the second wire insertion slot. A circle of spring groove is provided on the inner wall of the cable port, and the locking assembly includes a tension spring fixedly connected to the inner wall of the top end of the spring slot, and the bottom of the tension spring is fixedly connected to the outer arc plate, and the outer arc plate is slidably arranged in the spring slot, and the inner wall of the outer arc plate is fixedly connected to the straight plate, and the outer arc plate is fixedly connected to the inner arc plate through the straight plate. A sliding groove is provided on the inner wall of the second wire insertion slot, and the inner arc plate is slidably arranged in the sliding groove, and the sliding groove is connected to the spring groove, and the straight plate can slide at the connection between the sliding groove and the spring groove.

5. The mobile cable installation and guiding device for photovoltaic power station according to claim 4, characterized in that: The outer arc plates, straight plates and inner arc plates are provided in multiple groups, and the spring groove is an annular groove, and the inner diameter of the spring groove gradually decreases from bottom to top.

6. The mobile cable installation guide device for photovoltaic power station according to claim 4, characterized in that: The diameter of the cable body is the same as the inner diameter of the second wire insertion slot. When the inner arc plate slides to the highest point, it can squeeze the cable body. The inner wall of the top of the inner arc plate is rounded. When the inner arc plate slides to the lowest point, it contacts the outer wall of the cable body and generates friction.

7. The mobile cable installation and guiding device for photovoltaic power station according to claim 5, characterized in that: The tension spring is initially in a stretched state in the spring slot.

8. The mobile cable installation guide device for a photovoltaic power station according to claim 2, characterized in that: The wire management trough is spirally designed, and the spiral pattern of the wire management trough is the same as the thread on the surface of the threaded rod. The thread on the surface of the threaded rod can move the sleeve in the direction away from the swivel. The first wire insertion trough is used in conjunction with the baffle. The wire taking-up assembly is provided in multiple groups, and each group of wire taking-up assemblies is arranged equidistantly around the circumference with the center part of the guide disk as the center.

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