Gear driving type locking mechanism and underwater lifting deep sea aquaculture net cage

Abstract

The utility model discloses a gear drive type locking mechanism and an underwater lifting deep sea aquaculture net cage. The gear drive type locking mechanism comprises a telescopic spring bolt, a guide shell, a locking motor and a gear. The telescopic spring bolt is mounted in the guide shell, the guide shell is fixedly mounted in the mounting base, a machine body of the locking motor is mounted on the outer side of the guide shell, the power output end of the locking motor extends into the guide shell to be in transmission connection with a gear located in the guide shell, teeth are arranged on the telescopic spring bolt, and the locking motor rotates to lock the telescopic spring bolt. And under the mutual meshing action of the gear and the teeth, the telescopic spring bolt extends into or retreats from the spring bolt insertion hole. By designing the gear driving type locking mechanism, automatic and rapid mounting and dismounting of an object are achieved, the requirements for regular and frequent dismounting, maintenance and replacement of the object are met, the procedures such as manual violent bolt dismounting or repeated cutting and rewelding are not needed, the labor cost is reduced, and the overall maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to ocean engineering equipment technical field especially relates to a gear drive type locking mechanism and underwater lifting deep sea aquaculture net cage. BACKGROUND

[0002] Due to the global fishing yield changes little in recent 20 years, in order to meet the high-quality aquatic animal protein demand, aquaculture will be the only way of total aquatic product growth. Land-based and offshore aquaculture faces problems such as space, resource and environmental constraints, while the vast deep sea area has excellent water quality and fast water exchange rate, which is a new space for developing modern aquaculture and marine fishery economy, and the deep sea aquaculture net cage is an effective seawater aquaculture method. The self-elevating lifting net cage is an advanced deep sea aquaculture net cage, which can freely lift on the water surface and underwater according to the breeding needs and environmental conditions. The self-elevating deep sea net cage comprises a pile leg, a net cage body and a rack and pinion lifting unit. The net cage body is movably arranged on the pile leg, and the net cage body is controlled by the rack and pinion lifting unit, so that the net cage body can freely lift on the pile leg on the water surface and underwater, realizing specific water layer breeding and typhoon prevention functions.

[0003] At present, the waterproof performance of the rack and pinion lifting unit of the existing self-elevating deep sea aquaculture net cage is poor. The gear shaft connected with the motor output end in transmission on the rack and pinion lifting unit is soaked in seawater for a long time, which is easy to be corroded by seawater. Therefore, it needs to be regularly maintained and replaced with spare parts. However, the existing rack and pinion lifting unit is directly welded or bolted and fixed on the net cage body, so that the product is not convenient to disassemble when repairing or replacing parts, and it is difficult to replace spare parts. Therefore, the entire rack and pinion lifting unit needs to be replaced, and the maintenance cost is high.

[0004] Therefore, it is necessary to develop a waterproof locking mechanism that can be quickly disassembled and applied to the net cage lifting system and a deep sea aquaculture net cage containing the locking mechanism. UTILITY MODEL CONTENTS

[0005] In order to overcome the shortcomings of the prior art, one of the purposes of the utility model is to provide a gear drive type locking mechanism.

[0006] The second purpose of the utility model is to provide an underwater lifting deep sea aquaculture net cage.

[0007] One of the purposes of the utility model discloses a gear drive type locking mechanism for locking and fixing or loosening and separating articles on a mounting seat, which comprises a telescopic lock tongue, a guide shell, a locking motor and a gear.

[0008] Optionally, the mounting seat has a first mounting slot hole for mounting articles and a plurality of second mounting slot holes for mounting the gear drive type locking mechanism, the second mounting slot holes are uniformly distributed on the outer periphery of the first mounting slot hole, each of the second mounting slot holes is provided with a communication hole, and the second mounting slot hole communicates with the first mounting slot hole through the communication hole.

[0009] Optionally, the guide shell is fixedly installed in the second mounting slot hole through a cover plate, the periphery of the cover plate is provided with a waterproof sealing structure, a motor limiting groove for fixedly installing the locking motor is formed in the second mounting slot, and the locking motor is fixedly installed in the motor limiting groove.

[0010] The second purpose of the utility model is achieved by the following technical scheme: an underwater lifting deep-sea aquaculture net cage, comprising a pile leg, a net cage body, a lifting installation unit, a mounting seat and a rack and pinion lifting unit, wherein the net cage body is installed on the pile leg through the lifting installation unit, the mounting seat is fixedly installed on the lifting installation unit, the rack and pinion lifting unit comprises a transition flange and a lifting motor, the lifting motor is installed on the transition flange, the outer periphery of the transition flange is concavely provided with a lock tongue insertion hole, and the rack and pinion lifting unit is quickly locked and fixed or loosened and separated from the mounting seat through the gear drive type locking mechanism.

[0011] Optionally, a sealing ring is arranged at the connecting position between the transition flange and the output shaft of the lifting motor, or the transition flange is a labyrinth type flange with internal high-pressure gas.

[0012] Optionally, one end of the transition flange is a first installation part, and the other end is a second installation part, the radial area of the first installation part is greater than that of the second installation part, and the lock tongue insertion hole is distributed on the outer periphery of the first installation part.

[0013] Optionally, a middle part of the transition flange is provided with a through hole matched with a shape of the lifting motor power output shaft, the through hole penetrates the first mounting part and the second mounting part, the lifting motor is fixedly mounted on the second mounting part, and the lifting motor power output shaft extends out of the through hole.

[0014] Optionally, the pile leg is provided with a rack along an axial direction, the lifting mounting unit has an inner ring part and an outer ring part, the lifting mounting unit is movably sleeved on the pile leg through the inner ring part, and the net cage body is detachably mounted on the outer ring part of the lifting mounting unit; a power output end of the gear and rack lifting unit is provided with a climbing gear, the climbing gear is in meshing transmission with the rack on the pile leg, so that the net cage body is driven to freely ascend and descend along the pile leg on the water surface and underwater.

[0015] Optionally, the net cage body is a cage-shaped space truss structure, which is constructed by modularized side modules, top modules and bottom modules, each side module is detachably mounted on the outer ring part of the lifting mounting unit, the side modules are located on side surfaces of the net cage body and used for constituting side parts of the cage-shaped space truss structure, the top modules are located on top parts of the net cage body and used for constituting top surfaces of the cage-shaped space truss structure, and the bottom modules are located on bottom parts of the net cage body and used for constituting bottom surfaces of the cage-shaped space truss structure.

[0016] Optionally, the side module comprises upper cross beams, lower cross beams and diagonal brace assemblies; the upper cross beams and the lower cross beams are arranged in parallel with each other, and the diagonal brace assemblies are detachably mounted between the upper cross beams and the lower cross beams.

[0017] The top module comprises top cross beams and top diagonal braces; a plurality of top cross beams are connected in a head-tail mode to form a top outer frame of the net cage, and each top diagonal brace is detachably connected to adjacent two top cross beams; or the top cross beams are replaced by the upper cross beams in the side module.

[0018] The bottom module comprises bottom cross beams, cross pipes and bottom diagonal braces; a plurality of bottom cross beams are connected in a head-tail mode to form a bottom outer frame of the net cage, each bottom diagonal brace is detachably connected to adjacent two bottom cross beams, and ends of the cross pipes are detachably connected to the bottom diagonal braces; the cross pipes are integrally formed or are detachably connected by a plurality of pipe bodies; or the bottom cross beams are replaced by the lower cross beams in the side module.

[0019] Compared with the prior art, the net cage body has the following beneficial effects:

[0020] 1. The application realizes automatic and rapid installation and disassembly of the object by designing a gear drive type locking mechanism, specifically by controlling the locking motor to drive the retractable lock tongue to automatically extend into the lock tongue insertion hole on the object or exit the lock tongue insertion hole, meeting the needs of regular and frequent disassembly and maintenance of the object, without the need for manpower to disassemble the bolt or repeatedly cut and re-weld, reducing labor cost and overall maintenance cost.

[0021] 2. The cage body provided by the application is composed of a plurality of face modules according to a certain shape and order, and various specifications of the cage can be manufactured by using the modular net module, which has a large aquaculture water body, high structural strength and low cost. The modular design concept is suitable for batch production, easy to assemble and maintain, and can greatly reduce the maintenance cost. Specifically, each aquaculture cage can be expanded to a multi-degree-of-freedom aquaculture space by combining and assembling the modular face modules according to actual needs, such as triangular, mouth-shaped, sun-shaped, field-shaped, six-port-shaped and eight-port-shaped cross sections, providing various convenient expansion schemes, realizing space utilization in the installation process of the modular cage, minimizing unnecessary space waste, having strong practicality, reducing resource waste and being helpful to sustainable development.

[0022] 3. The application optimizes the sealing between the transition flange and the output shaft of the lifting motor, specifically by adding multiple sealing rings or using a labyrinth type flange with high-pressure gas inside the transition flange, thereby achieving excellent waterproof effect, prolonging maintenance time and reducing maintenance cost. More importantly, the structure enables the gear and rack lifting unit to dive into deeper sea areas, improving the applicability of the aquaculture cage.

[0023] 4. The application increases the installation contact area between the transition flange and the mounting seat by designing the transition flange to have a radial area larger than that of the second mounting part, thereby improving the installation reliability and firmness. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a mounting structure schematic view of the gear drive type locking mechanism and the mounting seat of the preferred embodiment 1 of the application.

[0025] Figure 2 It is a local disassembly schematic view of the gear drive type locking mechanism and the mounting seat of the preferred embodiment 1 of the application.

[0026] Figure 3 It is a local disassembly schematic view of the gear drive type locking mechanism and the mounting seat of the preferred embodiment 1 of the application. Figure 2 It is an enlarged schematic view of position A in the figure.

[0027] Figure 4 It is an assembly schematic view of the transition flange and the gear drive type locking mechanism of the preferred embodiment 1 of the application.

[0028] Figure 5 It is the longitudinal section schematic view of gear drive type locking mechanism and mounting seat of preferred embodiment 1 of the utility model;

[0029] Figure 6 It is the longitudinal section schematic view of gear drive type locking mechanism and mounting seat of preferred embodiment 1 of the utility model; Figure 5 It is the enlarged schematic view of B place in it;

[0030] Figure 7 It is the longitudinal section schematic view of gear drive type locking mechanism and mounting seat of preferred embodiment 1 of the utility model;

[0031] Figure 8 It is the longitudinal section schematic view of gear drive type locking mechanism and mounting seat of preferred embodiment 1 of the utility model; Figure 7 It is the enlarged schematic view of C place in it;

[0032] Figure 9 It is the structure schematic view of underwater lifting deep sea aquaculture net cage of preferred embodiment 2 of the utility model;

[0033] Figure 10 It is the structure schematic view of underwater lifting deep sea aquaculture net cage of preferred embodiment 2 of the utility model; Figure 9 It is the enlarged schematic view of D place in it.

[0034] In the figure:

[0035] 100, gear drive type locking mechanism; 11, telescopic lock tongue; 12, guide shell; 13, locking motor; 14, gear; 15, gear tooth; 16, cover plate;

[0036] 200, mounting seat; 21, first mounting slot hole; 22, second mounting slot hole; 23, communication hole;

[0037] 300, article / rack and pinion lifting unit; 31, transition flange; 311, lock tongue insertion hole; 312, first mounting part; 313, second mounting part; 314, through hole; 32, lifting motor; 33, climbing gear;

[0038] 400, pile leg; 41, rack;

[0039] 500, net cage body; 51, side module; 52, top module; 53, bottom module;

[0040] 600, lifting mounting unit; 61, inner ring part; 62, outer ring part. DETAILED DESCRIPTION

[0041] In the following, the utility model is further described in combination with the drawings and specific embodiments, and it should be noted that, under the premise of not conflicting, the following described each embodiment or each technical feature can be combined to form new embodiment.

[0042] Embodiment 1

[0043] As shown in Figures 1-10 A gear-driven locking mechanism 100 for locking and fixing or releasing an object 300 on a mounting base 200, the gear-driven locking mechanism 100 comprising a telescopic lock tongue 11, a guide housing 12, a locking motor 13, and a gear 14; the telescopic lock tongue 11 is installed in the guide housing 12, the guide housing 12 is fixedly installed in the mounting base 200, the body of the locking motor 13 is installed outside the guide housing 12, the power output end of the locking motor 13 extends into the inside of the guide housing 12 and is in transmission connection with the gear 14 located inside the guide housing 12, the telescopic lock tongue 11 is provided with teeth 15, and the locking motor 13 rotates, under the mutual meshing action of the gear 14 and the teeth 15, the telescopic lock tongue 11 extends into or exits the lock tongue insertion hole 311 of the object 300 to quickly lock and fix or release the object 300 on the mounting base 200.

[0044] The present application adds a gear-driven locking mechanism 100, specifically by controlling the locking motor 13 to drive the telescopic lock tongue 11 to automatically extend into the lock tongue insertion hole 311 on the object 300 for locking or exit for releasing, to realize the automatic and rapid installation and disassembly of the object 300, meet the needs of regular and frequent disassembly and maintenance and replacement of the object, without the need for manpower to forcibly disassemble the bolts or repeatedly cut and re-weld, reduce the labor cost and the overall maintenance cost.

[0045] As a further preferred solution, the mounting base 200 has a first installation slot hole 21 for installing the object 300 and a plurality of second installation slot holes 22 for installing the gear-driven locking mechanism 100, the second installation slot holes 22 are uniformly distributed on the outer periphery of the first installation slot hole 21, each of the second installation slot holes 22 is provided with a communication hole 23, and the second installation slot hole 22 communicates with the first installation slot hole 21 through the communication hole 23; the gear-driven locking mechanism 100 is respectively installed in each of the second installation slot holes 22, and the object 300 is installed in the first installation slot hole 21.

[0046] As a further preferred solution, the guide housing 12 is fixedly installed in the second installation slot hole 22 through a cover plate 16, the periphery of the cover plate 16 is provided with a waterproof sealing structure, a motor limiting groove (not shown in the figure) for fixedly installing the locking motor 13 is formed in the second installation slot, and the locking motor 13 is fixedly installed in the motor limiting groove.

[0047] The present application designs a plurality of slot hole structures on the mounting base 200 for installing the gear-driven locking mechanism 100, which is compact, reasonable, and highly applicable.

[0048] Embodiment 2

[0049] As shown in Figures 1-10 An underwater lifting deep-sea aquaculture net cage, including a pile leg 400, a net cage body 500, a lifting installation unit 600, a mounting seat 200, a rack and pinion lifting unit 300; the net cage body 500 is installed on the pile leg 400 through the lifting installation unit 600, the mounting seat 200 is fixedly installed on the lifting installation unit 600, and the rack and pinion lifting unit 300 includes a transition flange 31 and a lifting motor 32, the lifting motor 32 is installed on the transition flange 31, and the outer periphery of the transition flange 31 is concavely provided with a lock tongue insertion hole 311; the rack and pinion lifting unit 300 is quickly locked and fixed or loosened and separated from the mounting seat 200 through the gear-driven locking mechanism 100 as described in Embodiment 1. The structure and function of the gear-driven locking mechanism 100 are exactly the same as those of Embodiment 1, and are not repeated here.

[0050] As a further preferred solution, a sealing ring is arranged at the connecting position of the transition flange 31 and the output shaft of the lifting motor 32; or the transition flange 31 is a labyrinth type flange with high pressure gas inside.

[0051] The present application optimizes the sealing between the transition flange 31 and the output shaft of the lifting motor 32, specifically by adding multiple layers of sealing rings, or using a labyrinth type flange with high pressure gas inside the transition flange 31, thereby achieving excellent waterproof effect, prolonging maintenance time and reducing maintenance cost. More importantly, this structure can make the rack and pinion lifting unit dive into deeper sea areas, improving the applicability of the aquaculture net cage.

[0052] As a further preferred solution, one end of the transition flange 31 is a first mounting portion 312, and the other end is a second mounting portion 313, the radial area of the first mounting portion 312 is greater than the radial area of the second mounting portion 313, and the lock tongue insertion hole 311 is distributed on the outer periphery of the first mounting portion 312.

[0053] Among them, the transition flange 31 is designed to have a first mounting portion 312 with a larger radial area than the second mounting portion 313, thereby increasing the installation contact area with the mounting seat 200 and improving the installation reliability and firmness.

[0054] As a further preferred solution, the transition flange 31 has a through hole 314 in the middle that is adapted to the shape of the power output shaft of the lifting motor 32, the through hole 314 penetrates the first mounting portion 312 and the second mounting portion 313, the lifting motor 32 is fixedly installed on the second mounting portion 313, and the power output shaft of the lifting motor 32 extends from the through hole 314.

[0055] As a further preferred solution, the pile leg 400 is externally provided with a rack 41 extending along the axial direction, the lifting mounting unit 600 is provided with an inner ring portion 61 and an outer ring portion 62, the lifting mounting unit 600 is movably sleeved on the pile leg 400 through the inner ring portion 61, and the net cage body 500 is detachably mounted on the outer ring portion 62 of the lifting mounting unit 600; the power output end of the gear-rack lifting unit is provided with a climbing gear 33, the climbing gear 33 is in meshing transmission with the rack 41 on the pile leg 400, so as to drive the net cage body 500 to freely lift along the pile leg 400 on the water surface and underwater.

[0056] As a further preferred solution, the net cage body 500 is a cage-shaped space truss structure, which is built by modularized side modules 51, top modules 52 and bottom modules 53; each of the side modules 51 is detachably mounted on the outer ring portion 62 of the lifting mounting unit 600, and is located at the side of the net cage body 500 to form the side of the cage-shaped space truss structure; the top modules 52 are located at the top of the net cage body 500 to form the top of the cage-shaped space truss structure; and the bottom modules 53 are located at the bottom of the net cage body 500 to form the bottom of the cage-shaped space truss structure.

[0057] As a further preferred solution, the side module 51 comprises an upper cross beam, a lower cross beam and a diagonal brace assembly; the upper cross beam and the lower cross beam are arranged in parallel with each other, and the diagonal brace assembly is detachably mounted between the upper cross beam and the lower cross beam.

[0058] The top module 52 comprises a top cross beam and a top diagonal brace; a plurality of top cross beams are connected end to end to form a top outer frame of the net cage, and each of the top diagonal braces is detachably connected to two adjacent top cross beams; or the top cross beam is replaced by the upper cross beam in the side module 51.

[0059] The bottom module 53 comprises a bottom cross beam, a cross pipe and a bottom diagonal brace; a plurality of bottom cross beams are connected end to end to form a bottom outer frame of the net cage, each of the bottom diagonal braces is detachably connected to two adjacent bottom cross beams, the cross pipe is detachably connected to the bottom diagonal brace at the end thereof, and the cross pipe is integrally formed or detachably connected by a plurality of pipe bodies; or the bottom cross beam is replaced by the lower cross beam in the side module 51.

[0060] The cage body 500 provided by the application is composed of a plurality of surface modules in a certain shape and order, and various specifications of the cage with large aquaculture water body, high structural strength and low cost can be manufactured through the modular net module. The modular design concept is adopted, the component types are few, batch production is suitable, assembly is easy, maintenance is convenient, a single grid unit can be individually disassembled and repaired, and the maintenance cost can be greatly reduced. Specifically, each aquaculture cage can be combined and assembled through the modular surface module according to actual needs, the expansion of the multi-degree-of-freedom aquaculture space can be realized, for example, the cross section of the aquaculture cage is triangular, H-shaped, day-shaped, field-shaped, six-port-shaped, eight-port-shaped, etc., various convenient expansion schemes are provided, the space utilization in the installation process of the modular cage is realized, unnecessary space waste is minimized, the practicality is high, resource waste is reduced, and the sustainable development is helpful.

[0061] The above embodiments are only preferred embodiments of the application, and cannot be used to limit the scope of protection of the application. Any non-essential changes and replacements made by those skilled in the art on the basis of the application belong to the scope of protection of the application.

Claims

1. A gear driven locking mechanism for locking and releasing an article on a mounting base, characterized in that, The gear drive locking mechanism comprises a telescopic lock tongue, a guide housing, a locking motor and a gear; the telescopic lock tongue is installed in the guide housing, the guide housing is fixedly installed in the mounting seat, the body of the locking motor is installed outside the guide housing, the power output end of the locking motor extends into the inside of the guide housing and is in transmission connection with the gear located in the inside of the guide housing, the telescopic lock tongue is provided with teeth, the locking motor rotates, under the mutual meshing action of the gear and the teeth, the telescopic lock tongue extends into or exits the lock tongue insertion hole of the article to quickly lock and fix the article or loosen and separate the article from the mounting seat.

2. The gear-driven locking mechanism of claim 1, wherein, The mounting seat is provided with a first mounting slot hole for mounting the article and a plurality of second mounting slot holes for mounting the gear drive locking mechanism, the second mounting slot holes are uniformly distributed on the outer periphery of the first mounting slot hole, each of the second mounting slot holes is provided with a communication hole, and the second mounting slot hole communicates with the first mounting slot hole through the communication hole; the gear drive locking mechanism is respectively installed in each of the second mounting slot holes, and the article is installed in the first mounting slot hole.

3. The gear-driven locking mechanism of claim 2, wherein, The guide housing is fixedly installed in the second mounting slot hole through a cover plate, the periphery of the cover plate is provided with a waterproof sealing structure, the second mounting slot is provided with a motor limiting groove for fixedly installing the locking motor, and the locking motor is fixedly installed in the motor limiting groove.

4. An underwater lifting deep sea farming net cage, characterized by, The net cage body is installed on the pile leg through the lifting installation unit, the mounting seat is fixedly installed on the lifting installation unit, the rack and pinion lifting unit comprises a transition flange and a lifting motor, the lifting motor is installed on the transition flange, the outer periphery of the transition flange is concavely provided with a lock tongue insertion hole, and the rack and pinion lifting unit is quickly locked and fixed or loosened and separated from the mounting seat through the gear drive locking mechanism of any one of claims 1-3.

5. The submersible lifting deep sea farming net cage according to claim 4, c h a r a c t e r i z e d in that The transition flange is provided with a sealing ring at the connection position of the transition flange and the output shaft of the lifting motor; or the transition flange adopts a labyrinth type flange with internal high-pressure gas.

6. The submersible lifting deep sea farming net cage according to claim 4, wherein, One end of the transition flange is a first installation part, the other end is a second installation part, the radial area of the first installation part is greater than that of the second installation part, and the lock tongue insertion hole is distributed on the outer periphery of the first installation part.

7. The submersible lifting deep sea farming net cage according to claim 6, c h a r a c t e r i z e d in that The middle part of the transition flange is provided with a through hole matched with the shape of the power output shaft of the lifting motor, the through hole penetrates the first installation part and the second installation part, the lifting motor is fixedly installed on the second installation part, and the power output shaft of the lifting motor extends out of the through hole. The middle part of the transition flange is provided with a through hole matched with the shape of the power output shaft of the lifting motor, the through hole penetrates the first installation part and the second installation part, the lifting motor is fixedly installed on the second installation part, and the power output shaft of the lifting motor extends out of the through hole.

8. The underwater elevating deep sea net cage according to claim 4, wherein, The pile leg is provided with a rack extending along the axial direction, the lifting installation unit is provided with an inner ring part and an outer ring part, the lifting installation unit is movably sleeved on the pile leg through the inner ring part, and the net cage body is detachably installed on the outer ring part of the lifting installation unit; the power output end of the gear rack lifting unit is provided with a climbing gear, the climbing gear is in meshing transmission with the rack on the pile leg, so as to drive the net cage body to freely lift along the pile leg on the water surface and underwater.

9. The underwater elevating deep sea cage according to claim 4, wherein, The net cage body is a cage-shaped space truss structure, which is built by modularized side modules, top modules and bottom modules, each side module is detachably installed on the outer ring part of the lifting installation unit, the side module is located on the side of the net cage body and is used for constituting the side part of the cage-shaped space truss structure, the top module is located on the top of the net cage body and is used for constituting the top surface of the cage-shaped space truss structure, and the bottom module is located on the bottom of the net cage body and is used for constituting the bottom surface of the cage-shaped space truss structure.

10. The submersible lifting deep sea farming net cage according to claim 9, characterized in that, The side module comprises an upper cross beam, a lower cross beam and a diagonal brace assembly, the upper cross beam and the lower cross beam are arranged in parallel with each other, and the diagonal brace assembly is detachably installed between the upper cross beam and the lower cross beam. The top module comprises a top cross beam and a top diagonal brace, a plurality of top cross beams are connected in series to form a top outer frame of the net cage, and each top diagonal brace is detachably connected to two adjacent top cross beams; or the top cross beam is replaced by the upper cross beam in the side module. The bottom module comprises a bottom cross beam, a cross pipe and a bottom diagonal brace, a plurality of bottom cross beams are connected in series to form a bottom outer frame of the net cage, each bottom diagonal brace is detachably connected to two adjacent bottom cross beams, the cross pipe is detachably connected to the bottom diagonal brace, and the cross pipe is integrally formed or is detachably connected by a plurality of pipe bodies; or the bottom cross beam is replaced by the lower cross beam in the side module.

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