Modular grid unit and cage

Abstract

The present application relates to a modular mesh unit and cage. The mesh unit is assembled from a first rod, a second rod, a third rod, and a connector. This modular mesh unit can be used to manufacture aquaculture cages of various specifications, providing large aquaculture water bodies, high structural strength, and low cost. The modular design concept reduces the number of components, making it suitable for mass production, easy to assemble, and convenient to maintain. Individual mesh units can be disassembled and repaired individually, significantly reducing maintenance costs.

Description

Technical Field

[0001] The present application relates to the field of marine aquaculture technology, and in particular to a modular grid unit and a cage. Background Art

[0002] Large-scale marine aquaculture in coastal areas is concentrated in shallow, nearshore waters, leading to industrial conflicts, ecological damage, and quality safety issues. Therefore, expanding marine aquaculture from nearshore to offshore and deep-sea areas has become an inevitable choice for sustainable development. However, the strong winds, deep waters, and rapid currents of deep-sea areas place special demands on the structure and performance of aquaculture equipment.

[0003] Existing technology often uses cages for nearshore aquaculture, often constructed from PE (polyethylene) pipes, polyurethane foam floats, and wooden planks. These cages have low overall structural strength, limited aquaculture water volume, and limited wind and wave resistance. Typhoons can severely damage the cages, causing significant losses to the aquaculture industry. Large steel-structured aquaculture cages offer superior wind and wave resistance, but they are often expensive to build and maintain, making them difficult to deploy on a large scale. Summary of the Invention

[0004] In view of this, embodiments of the present application provide a modular grid unit and a grid cage to solve at least one problem existing in the background technology.

[0005] In a first aspect, the present invention provides a modular grid unit comprising:

[0006] a plurality of first rods, each of the first rods comprising a first rod body and two first lugs, the two first lugs being axially symmetrically fixed to two ends of the first rod body, the first lugs being provided with first mounting holes, the axes of the first mounting holes being perpendicular to the first rod body;

[0007] a plurality of second rods, each of the second rods comprising a second rod body and two second lugs, the two second lugs being axially symmetrically fixed to two ends of the second rod body, the second lugs being provided with second mounting holes, the axial direction of the second mounting holes being perpendicular to the second rod body;

[0008] a plurality of third rods, each comprising a third rod body and two third lugs, the two third lugs being centrally symmetrically fixed to two ends of the third rod, each lug having a third mounting hole formed therein, the axial direction of the third mounting hole forming an angle of 0 to 90 degrees with the third rod body;

[0009] a connecting member capable of cooperating with the first mounting hole, the second mounting hole, and the third mounting hole to fix the first rod, the second rod, and the third rod to each other;

[0010] A plurality of the first rods are arranged along a first path and connected end to end, and a plurality of the second rods are arranged along a second path and connected end to end; a plurality of the first rods and a plurality of the second rods intersect to form a plurality of grids, and a plurality of the third rods are arranged along the diagonal lines of the grids; the third mounting hole is aligned with the first mounting hole or the second mounting hole, and the connecting member is passed through the aligned third mounting hole and the first mounting hole or the aligned third mounting hole and the second mounting hole.

[0011] Preferably, the modular grid unit of the present invention, the connecting member

[0012] include:

[0013] a shaft, configured to pass through the first mounting hole, the second mounting hole, or the third mounting hole;

[0014] A fixed end, fixed to one end of the shaft;

[0015] a detachable end head, detachably mounted on the other end of the shaft body, and used to cooperate with the fixed end head to limit the movement of the first ear plate, the second ear plate, or the third ear plate;

[0016] A fourth ear plate is fixed on the fixed end and the detachable end, and a fourth mounting hole is provided on the fourth ear plate; the fourth ear plate is used to be connected to the first ear plate or the second ear plate.

[0017] Preferably, in the modular grid unit of the present invention, the connecting member further comprises:

[0018] a pin capable of passing through the fourth mounting hole, the first mounting hole and / or the second mounting hole;

[0019] A pin shaft clamping piece is detachably connected to the pin shaft to fix the pin shaft to the fourth ear plate.

[0020] Preferably, in the modular grid unit of the present invention, the connector further comprises: a tapered pin;

[0021] The detachable end head is sleeved on one end of the shaft body through a blind hole, and positioning pin holes are provided at corresponding positions of the detachable end head and one end of the shaft body; the detachable end head can be connected and fixed to the shaft body by inserting the tapered pin into the positioning pin hole.

[0022] Preferably, in the modular grid unit of the present invention, two fourth ear plates are provided on each of the fixed end head and the detachable end head, and a gap is formed between the two fourth ear plates for the first ear plate or the second ear plate to be inserted.

[0023] Preferably, in the modular grid unit of the present invention, the first rod body, the second rod body and / or the third rod body are hollow tubes with sealed ends.

[0024] Preferably, the modular grid unit of the present invention further comprises an end cap, wherein the end cap comprises:

[0025] A cap body, one end of which has a blind hole, and a positioning pin hole is provided at a corresponding position of the cap body and one end of the shaft body; the cap body and the shaft body can be connected and fixed by inserting the tapered pin into the positioning pin hole;

[0026] A top plate is fixed to the other end of the cap body.

[0027] Preferably, in the modular grid unit of the present invention, the first ear plate and the second ear plate both extend along a plane;

[0028] The third ear plate includes an ear plate main body and an ear plate bent portion, and the ear plate bent portion is integrally connected to the ear plate main body and forms an angle of 0 degrees to 90 degrees therewith.

[0029] In a second aspect, an embodiment of the present application provides a modular cage comprising the modular grid unit described in the first aspect.

[0030] Preferably, the modular cage comprises:

[0031] The modular grid units are arranged in a circular shape;

[0032] Or, the modular grid units are arranged in a square shape.

[0033] The modular grid unit and cage provided by the present invention are formed by assembling a first rod, a second rod, a third rod, and a connector. This modular grid unit can be used to manufacture aquaculture cages of various specifications, providing large aquaculture water bodies, high structural strength, and low cost. The modular design concept reduces the number of components, making it suitable for mass production, easy to assemble, and convenient to maintain. Individual grid units can be disassembled and repaired individually, significantly reducing maintenance costs.

[0034] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0036] Figure 1A schematic diagram of the modular grid unit connection structure provided in an embodiment of the present application;

[0037] Figure 2 A schematic diagram of a local structure of a modular grid unit provided in an embodiment of the present application;

[0038] Figure 3 A schematic diagram of the first rod structure provided in an embodiment of the present application;

[0039] Figure 4 A schematic diagram of a first rod component provided in an embodiment of the present application;

[0040] Figure 5 A schematic diagram of the second rod structure provided in an embodiment of the present application;

[0041] Figure 6 A schematic diagram of a third rod structure provided in an embodiment of the present application;

[0042] Figure 7 A schematic diagram of the structure of the third ear plate provided in an embodiment of the present application;

[0043] Figure 8 A schematic diagram of the connector structure provided in an embodiment of the present application;

[0044] Figure 9 A schematic diagram of the pin shaft installation structure provided in an embodiment of the present application;

[0045] Figure 10 A schematic diagram of the tapered pin structure provided in an embodiment of the present application;

[0046] Figure 11 A schematic diagram of the end cap installation structure provided in an embodiment of the present application;

[0047] Figure 12 A schematic diagram of the circular cage structure provided in an embodiment of the present application;

[0048] Figure 13 A schematic diagram of the square cage structure provided in an embodiment of the present application;

[0049] Figure 14 Schematic diagram of the multi-cage structure provided in an embodiment of the present application.

[0050] The reference numerals in the figures are:

[0051] J1 first member;

[0052] J11: first rod body; J12: first ear plate; J121: first mounting hole; J13: gasket; J14: cover plate;

[0053] J2 second member;

[0054] J21 Second rod body; J22 Second ear plate; J221 Second mounting hole;

[0055] J3 third member;

[0056] J31 third rod body; J32 third ear plate; J321 third mounting hole; J322 ear plate body; J323 ear plate bending portion;

[0057] L1 connector;

[0058] L11 shaft; L12 fixed end; L13 removable end; L131 blind hole; L132 positioning pin hole; L133 tapered pin;

[0059] L14 fourth lug;

[0060] L141 fourth mounting hole;

[0061] L15 pin;

[0062] L16 pin clamping piece;

[0063] L2 Block;

[0064] L21 cap body;

[0065] L22 top plate. DETAILED DESCRIPTION

[0066] The exemplary embodiments disclosed herein will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the specific embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0067] In the following description, numerous specific details are provided to provide a more thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present application; that is, all features of actual embodiments are not described herein, nor are well-known functions and structures described in detail.

[0068] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein for convenience of description to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that in addition to the orientations shown in the figures, the spatially relative terms are intended to include different orientations of the device in use and operation. For example, if the device in the drawings is turned over, then the elements or features described as "under" or "beneath" or "beneath" the other elements will be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "under" can include both the above and below orientations. The device can be oriented otherwise (rotated 90 degrees or in other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0069] The purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present application. When used herein, the singular forms "a", "an", and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0070] In order to fully understand the present application, detailed steps and detailed structures will be presented in the following description to illustrate the technical solution of the present application. The preferred embodiments of the present application are described in detail below. However, in addition to these detailed descriptions, the present application may also have other implementation methods.

[0071] This embodiment provides a modular grid unit, such as Figure 1-Figure 7 Shown, including:

[0072] a plurality of first rods J1, each comprising a first rod body J11 and two first lugs J12, the two first lugs J12 being axially symmetrically fixed to the ends of the first rod body J11, each of the first lugs J12 defining a first mounting hole J121, the axial direction of the first mounting hole J121 being perpendicular to the first rod body J11;

[0073] A plurality of second rods J2, each comprising a second rod body J21 and two second lugs J22, the two second lugs J22 being axially symmetrically fixed to the ends of the second rod body J21, each second lug J22 defining a second mounting hole J221, the axial direction of the second mounting hole J221 being perpendicular to the second rod body J21;

[0074] A plurality of third rods J3, each comprising a third rod body J31 and two third lugs J32, the two third lugs J32 being fixed symmetrically at both ends of the third rod J3, each lug J32 defining a third mounting hole J321, the axial direction of the third mounting hole J321 forming an angle of 0 to 90 degrees with the third rod body J31;

[0075] a connecting member L1, wherein the connecting member L1 can cooperate with the first mounting hole J121, the second mounting hole J221, and the third mounting hole J321 to fix the first rod J1, the second rod J2, and the third rod J3 to each other;

[0076] A number of the first rods J1 are arranged along a first path and connected end to end, and a number of the second rods J2 are arranged along a second path and connected end to end; a number of the first rods J1 and a number of the second rods J2 intersect to form a number of grids, and a number of the third rods J3 are arranged along the diagonals of the grids; the third mounting hole J321 is aligned with the first mounting hole J121 or the second mounting hole J221, and the connecting member L1 is passed through the aligned third mounting hole J321 and the first mounting hole J121 or the aligned third mounting hole J321 and the second mounting hole J221.

[0077] like Figure 1 、 Figure 2 As shown, the modular grid unit provided in this embodiment exemplarily shows a part of the connection structure. It can be understood that as a unit, several such units can be arranged in the horizontal and vertical directions to eventually form a complete net box. Among them, several first rods J1 and several second rods J2 are crossed to form several grids of the net box, and several third rods J3 are arranged along the diagonal lines of the grid to form a triangular stable structure so that the shape of the grid can be maintained. The connection between the first rod J1, the second rod J2 and the third rod J3 is through various ear plates, wherein, as shown in FIG. Figure 3-Figure 5 As shown, the ear plate structure of the first rod J1 and the second rod J2 is the same, the axial direction of the first mounting hole J121 is perpendicular to the first rod body J11, and the axial direction of the second mounting hole J221 is perpendicular to the second rod body J21. The ear plate structure of the third rod J3 is different from the former, as shown in FIG. Figure 6 、 Figure 7As shown, the axial direction of the third mounting hole J321 forms an angle of 0 to 90 degrees with the third rod body J31. This design principle utilizes the third rod J3 as a diagonal brace for the grid. Since the third rod is connected in a different direction than the previous one, the axial direction of the third mounting hole J321 is angled relative to the third rod body J31. It is understood that the closer the grid formed by the first and second rods J1 and J2 is to a square, the closer the axial angle of the third mounting hole J321 with the third rod body J31 is to 45 degrees. It is understood that the first and second rods J1 and J2 can be the same length. If they are the same length, the first and second rods J1 and J2 can be structurally identical in terms of their functionality in this embodiment and can be interchangeable. Of course, the first and second rods J1 and J2 can also be of different lengths. It is understood that using different lengths allows for a wider range of grid configurations. Furthermore, this embodiment provides three rods as examples. In other embodiments, it is understood that more rods may be used, such as a fourth rod, a fifth rod, etc. In this embodiment, the connector L1 can cooperate with the first mounting hole J121, the second mounting hole J221, and the third mounting hole J321, thereby securing the first rod J1, the second rod J2, and the third rod J3 to each other, ensuring that the grid unit can be assembled or disassembled at any time.

[0078] The modular grid unit of this embodiment has the following advantages:

[0079] It consists of rods and connectors, has a simple structure, is easy to assemble, and can be assembled into different shapes.

[0080] The assembled cages can be disassembled and maintained by replacing each piece individually, with low maintenance costs and can be restored quickly after damage.

[0081] It adopts modular design and mostly universal components. By adjusting the length of the rods and using connectors to connect them, aquaculture cages of different shapes and sizes can be assembled. The modular design facilitates mass production.

[0082] Compared with traditional fish farming and PE pipe cages, it has higher structural strength, can adapt to more severe wind and wave conditions, and is not easily damaged.

[0083] Structural parts can be recycled, but PE pipes can only be replaced after being damaged, and PE pipes after being disassembled can only be treated as waste.

[0084] (6) Through different forms of assembly, the size of the aquaculture water body can be adjusted at will and can be easily expanded.

[0085] (7) Mass production can effectively reduce production costs.

[0086] Preferably, the modular grid unit of this embodiment, such as Figure 8 As shown, the connecting member L1 includes:

[0087] The shaft L11 is used to pass through the first mounting hole J121, the second mounting hole J221 or the third mounting hole J321;

[0088] A fixed end L12 is fixed to one end of the shaft L11;

[0089] a detachable end L13, detachably mounted on the other end of the shaft L11, for cooperating with the fixed end L12 to restrict movement of the first lug J12, the second lug J22, or the third lug J32;

[0090] The fourth ear plate L14 is fixed to the fixed end L12 and the detachable end L13. The fourth ear plate L14 is provided with a fourth mounting hole L141. The fourth ear plate L14 is used to connect with the first ear plate J12 or the second ear plate J22.

[0091] In this embodiment, the shaft L11 of the connector L1 is used to connect the ear plates in series. The connector L1 has a detachable end cap L13, which facilitates the fixing of the connected ear plates and the replacement of damaged rods. When replacing a rod, it is necessary to remove the detachable end cap L13 from one end of the connector L1, remove the ear plate corresponding to the damaged rod from the end of the shaft L11, replace it with a new rod, and then reinstall the detachable end cap L13. The fourth ear plate L14 also has a fourth mounting hole L141 for connecting to the first ear plate J12 or the second ear plate J22. Through the structure of the fourth ear plate L14, the connector L1 can connect the rods not only radially but also axially, so that the rods are staggered to form a grid.

[0092] Preferably, the modular grid unit of this embodiment, such as Figure 9 As shown, the connecting member L1 further includes:

[0093] The pin L15 can pass through the fourth mounting hole L141, the first mounting hole J121 and / or the second mounting hole J221;

[0094] The pin clamping member L16 is detachably connected to the pin L15 to fix the pin L15 to the fourth ear plate L14.

[0095] In this embodiment, the pin L15 can fix the first rod J1 or the second rod J2 connected to the two ends of the connecting member L1, and the pin clamping member L16 is used to prevent the pin L15 from loosening. Figure 9As shown, one side of the pin L15 has a notch for the pin clamping member L16 to be inserted into. After the pin clamping member L16 is inserted into the notch, the position of the pin L15 is locked. Preferably, in order to prevent the pin clamping member L16 from loosening, the pin clamping member L16 can also have an interference fit with the notch.

[0096] Preferably, the modular grid unit of this embodiment, such as Figure 10 As shown, the connecting member L1 further includes: a tapered pin L133;

[0097] like Figure 8 、 Figure 9 As shown, the detachable end cap L13 is sleeved onto one end of the shaft body L11 through a blind hole L131. Positioning pin holes L132 are provided at corresponding positions on the detachable end cap L13 and one end of the shaft body L11. A tapered pin L133 is inserted into the positioning pin hole L132 to secure the detachable end cap L13 to the shaft body L11. Preferably, to prevent loosening, the tapered pin L133 can have an interference fit with the positioning pin hole L132. In other embodiments, the blind hole L131 can be replaced with a threaded hole, and the corresponding end of the shaft body L11 can be threaded. This solution can improve the stability of the connection between the detachable end cap L13 and the shaft body L11.

[0098] Preferably, the modular grid unit of this embodiment, such as Figure 8 As shown, two fourth lugs L14 are provided on both the fixed end L12 and the removable end L13, with a gap formed between the two fourth lugs L14 for the first lug J12 or the second lug J22 to insert into. In this embodiment, the structure in which the first lug J12 or the second lug J22 is inserted between the two fourth lugs L14 improves the stability of the connection, preventing the connection from shaking and becoming loose due to the impact of seawater during long-term use.

[0099] Preferably, the modular grid unit of this embodiment, such as Figure 3-Figure 6 As shown, the first rod body J11, the second rod body J21 and / or the third rod body J31 are hollow tubes with sealed ends. The hollow structure can reduce the weight per unit volume and facilitate the buoyancy of the cage in water. At the same time, the hollow design can also reduce material costs. Specifically, the manufacturing components of the hollow tube body of this embodiment are as follows: Figure 4As shown, taking the first rod J1 as an example, the first rod J1 includes a first rod body J11, a first ear plate J12, a gasket J13 and a cover plate J14, wherein the gasket J13 has a through hole corresponding to the first mounting hole J121. The gasket J13 is used to pad on both sides of the first ear plate J12 to reduce friction and shaking when the first ear plate J12 is connected to other ear plates. The cover plate J14 is used to close the two ends of the first rod body J11. In this embodiment, the hollow tube body takes a circular tube as an example, and the cover plates J14 are semicircular, with a total of 4 pieces. Two pieces are fixed at both ends of the first rod body J11. The fixing method can be welding. At the same time, the first ear plate J12 can also be fixed between the cover plates J14 during the welding process. Figure 3 shown.

[0100] Preferably, the modular grid unit of this embodiment, such as Figure 11 As shown, an end cap L2 is also included, and the end cap L2 includes:

[0101] The cap body L21 has a blind hole L131 at one end thereof, and positioning pin holes L132 are provided at corresponding positions on the cap body L21 and one end of the shaft body L11; the cap body L21 and the shaft body L11 can be connected and fixed by inserting a tapered pin L133 into the positioning pin hole L132;

[0102] The top plate L22 is fixed to the other end of the cap body L21.

[0103] like Figure 2 As shown, when a grid unit is at the edge, its connector L1 does not need to be connected to other units. Therefore, in this embodiment, to save component consumption of the connector L1, an end cap L2 is provided for the connector L1 at the edge of the cage. The cap L2 can replace the detachable end head L13. Alternatively, the connector L1 can be considered as another connector after the cap L2 replaces the detachable end head L13. However, the function of the connector remains unchanged and it mainly serves to save materials.

[0104] Preferably, the modular grid unit of this embodiment, such as Figure 3-Figure 7 As shown, the first ear plate J12 and the second ear plate J22 both extend along a plane;

[0105] The third ear plate J32 includes an ear plate main body J322 and an ear plate bent portion J323. The ear plate bent portion J323 is integrally connected to the ear plate main body J322 and forms an angle of 0 to 90 degrees therewith.

[0106] In this embodiment, the first and second lug plates J12 and J22 are simple, planar structures, resulting in low cost. The third lug plate J32 is designed so that its third mounting hole J321 is angled relative to the third rod body J31. The lug plate's bent portion J323 is angled relative to the lug body J322, facilitating connection of the third rod J3 to other rods.

[0107] like Figure 12-14 As shown, this embodiment also provides a modular grid cage, including the above-mentioned modular grid units.

[0108] Preferably, the modular cage of this embodiment comprises:

[0109] The modular grid units are arranged in a circular shape;

[0110] Or, the modular grid units are arranged in a square shape.

[0111] Assembly of the cage of this embodiment:

[0112] The cage is divided into three parts: outer frame, inner frame and diagonal bracing.

[0113] When the cage is assembled into a circle:

[0114] Outer frame: A single unit consists of two first rods J1, two second rods J2, and four connecting members L1.

[0115] Inner frame: A single unit consists of two first rods J1, two second rods J2, and four connecting members L1.

[0116] Since the radii of the outer frame and the inner frame are different, it is understandable that the lengths of the first rod J1 or the second rod J2 used in the outer frame and the inner frame are different.

[0117] Diagonal brace: A single unit consists of four third members J3. One end of the four third members J3 is connected to the connecting member L1 at one corner of the inner frame, and the other end is connected to the connecting members L1 at the four corners of the outer frame.

[0118] When the cage is assembled into a rectangle: the connection method is the same as that when the cage is assembled into a circle, but the lengths of the first rod J1 or the second rod J2 used in the outer frame and the inner frame are the same.

[0119] Cage assembly form:

[0120] Circular: The radius of the circular cage can be determined by adjusting the number and length of the first rods J1 or the second rods J2 of the outer and inner frames. Cross braces can be added inside the cage to ensure strength.

[0121] Rectangular cage: The cage size can be adjusted according to the number of first rods J1 or second rods J2.

[0122] Multi-box cage: On the basis of the rectangular cage, internal supports can be added to expand a single rectangular cage into a multi-box cage.

[0123] Cage culture area: The inner area of ​​the cage frame is the culture area, which is formed by hanging fishing nets inside the inner frame.

[0124] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations of the claims. Various modifications and variations may be made to the above embodiments without departing from the scope of the present disclosure. Similarly, the various technical features of the above embodiments may be arbitrarily combined to form additional embodiments of the present application that may not be explicitly described. Therefore, the above embodiments merely illustrate several implementations of the present application and do not limit the scope of protection of the patent application.

Claims

1. A modular grid unit, characterized in that: include: A plurality of first rods (J1), each of the first rods (J1) comprising a first rod body (J11) and two first ear plates (J12), the two first ear plates (J12) being axially symmetrically fixed to two ends of the first rod body (J11), a first mounting hole (J121) being formed on the first ear plate (J12), and an axial direction of the first mounting hole (J121) being perpendicular to the first rod body (J11); A plurality of second rods (J2), each of the second rods (J2) comprising a second rod body (J21) and two second ear plates (J22), the two second ear plates (J22) being axially symmetrically fixed to the two ends of the second rod body (J21), the second ear plates (J22) being provided with a second mounting hole (J221), the axial direction of the second mounting hole (J221) being perpendicular to the second rod body (J21); A plurality of third rods (J3), each of the third rods (J3) comprising a third rod body (J31) and two third ear plates (J32), the two third ear plates (J32) being fixed at both ends of the third rod (J3) in a centrally symmetrical manner, a third mounting hole (J321) being provided on the third ear plate (J32), and an axial direction of the third mounting hole (J321) forming an angle of 0 to 90 degrees with the third rod body (J31); a connecting member (L1), the connecting member (L1) being capable of cooperating with the first mounting hole (J121), the second mounting hole (J221), and the third mounting hole (J321) to fix the first rod (J1), the second rod (J2), and the third rod (J3) to each other; A plurality of first rods (J1) are arranged along a first path and connected end to end, and a plurality of second rods (J2) are arranged along a second path and connected end to end; a plurality of first rods (J1) and a plurality of second rods (J2) intersect to form a plurality of grids, and a plurality of third rods (J3) are arranged along the diagonal lines of the grids; the third mounting hole (J321) is aligned with the first mounting hole (J121) or the second mounting hole (J221), and the connecting member (L1) is passed through the aligned third mounting hole (J321) and the first mounting hole (J121) or the aligned third mounting hole (J321) and the second mounting hole (J221); The connecting piece (L1) comprises: an axis (L11), configured to pass through the first mounting hole (J121), the second mounting hole (J221), or the third mounting hole (J321); A fixed end (L12) is fixed to one end of the shaft (L11); a detachable end head (L13) detachably mounted on the other end of the shaft body (L11) and used to cooperate with the fixed end head (L12) to limit the movement of the first ear plate (J12), the second ear plate (J22) or the third ear plate (J32); A fourth ear plate (L14) is fixed on the fixed end head (L12) and the detachable end head (L13), and a fourth mounting hole (L141) is provided on the fourth ear plate (L14); the fourth ear plate (L14) is used to connect with the first ear plate (J12) or the second ear plate (J22).

2. The modular grid unit according to claim 1, wherein: The connecting piece (L1) further comprises: a pin (L15) capable of passing through the fourth mounting hole (L141), the first mounting hole (J121) and / or the second mounting hole (J221); A pin shaft clamping member (L16) is detachably connected to the pin shaft (L15) to fix the pin shaft (L15) to the fourth ear plate (L14).

3. The modular grid unit according to claim 1, wherein: The connecting member (L1) further includes: a tapered pin (L133); The detachable end head (L13) is sleeved on one end of the shaft body (L11) through a blind hole (L131), and positioning pin holes (L132) are provided at corresponding positions of the detachable end head (L13) and one end of the shaft body (L11); the detachable end head (L13) and the shaft body (L11) can be connected and fixed by inserting the tapered pin (L133) into the positioning pin hole (L132).

4. The modular grid unit according to claim 1, wherein: Two fourth ear plates (L14) are provided on each of the fixed end (L12) and the detachable end (L13), and a gap is formed between the two fourth ear plates (L14) for inserting the first ear plate (J12) or the second ear plate (J22).

5. The modular grid unit according to claim 1, wherein: The first rod body (J11), the second rod body (J21) and / or the third rod body (J31) are hollow tubes with sealed ends.

6. The modular grid unit according to claim 3, wherein: Also included is an end cap (L2), said end cap (L2) comprising: A cap body (L21), one end of which is provided with a blind hole (L131), and positioning pin holes (L132) are provided at corresponding positions on the cap body (L21) and one end of the shaft body (L11); the cap body (L21) and the shaft body (L11) can be connected and fixed by inserting the tapered pin (L133) into the positioning pin hole (L132); The top plate (L22) is fixed to the other end of the cap body (L21).

7. The modular grid unit according to claim 1, wherein: The first ear plate (J12) and the second ear plate (J22) both extend along a plane; The third ear plate (J32) comprises an ear plate main body (J322) and an ear plate bending portion (J323), wherein the ear plate bending portion (J323) is integrally connected to the ear plate main body (J322) and forms an angle of 0 to 90 degrees therewith.

8. A modular cage, characterized in that: Comprising a modular grid unit as described in any one of claims 1-5.

9. The modular cage according to claim 8, characterized in that: The modular cage comprises: The modular grid units are arranged in a circular shape; Or, the modular grid units are arranged in a square shape.

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