A coupling guard

Abstract

A kind of coupling protective cover, including base and arched cover plate, base includes two supports arranged on both sides of the main axis of protective cover, and the support includes first vertical plate;Cover plate includes top cover and two second vertical plates, the upper end of first vertical plate is inserted with the lower end of corresponding second vertical plate.The cover plate of the coupling protective cover of the utility model is connected in the way of insertion, when the coupling needs to be repaired, the cover plate is easily removed from the base, and after the cover plate is removed, the maintenance space is no longer limited by the cover plate, facilitating the repair of coupling.

Description

Technical Field

[0001] This utility model relates to protective covers, and more particularly to a coupling protective cover. Background Technology

[0002] According to Article 10.3.3 of the "Design Code for Pumps and Machinery for Petrochemical Industry" (GB / T 51007-2014), external rotating parts of pumps and machinery, such as couplings and drive wheels, should be equipped with fully enclosed, detachable safety guards. For pumps and machinery used in hazardous locations, the guards should be made of non-sparking materials.

[0003] Utility model patent CN202422020804.X discloses an openable motor coupling protective cover, including a protective cover body, a positioning base at the bottom of the protective cover body with a positioning through hole, an inspection port at the top of the protective cover body, a cover assembly inside the inspection port, and a protective cover cover movably mounted on the protective cover body. The protective cover cover has a mesh opening with a protective mesh inside. A positioning support foot is fixedly mounted on one side of the protective cover cover, and a limiting groove is provided at the end of the positioning support foot. An electromagnet is connected in the limiting groove. A sensor is provided at the edge of the protective cover cover, and a limiting mechanism is fixedly mounted on the front surface of the protective cover body. This openable motor coupling protective cover, through the cooperation of the electromagnet and the limiting mechanism, can prevent the user from opening the protective cover cover when the motor is started, thus improving the safety of use.

[0004] Although the coupling protective cover of this utility model has an inspection port at the upper end of the protective cover body, which can be opened for maintenance, the size of the inspection port is limited, and the frame of the inspection port will still hinder the maintenance work. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a coupling protective cover that facilitates the maintenance of couplings.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is a coupling protective cover, including a base and an arched cover plate. The base includes two supports arranged on both sides of the main axis of the protective cover, and the supports include a first vertical plate. The cover plate includes a top cover and two second vertical plates, and the upper end of the first vertical plate is inserted into the lower end of the corresponding second vertical plate.

[0007] The coupling protective cover described above has a first insertion part at the upper end of the first vertical plate, which includes a plurality of first insertion tenons and a plurality of first insertion slots, arranged alternately; the second vertical plate has a second insertion part at the lower end, which includes a plurality of second insertion tenons and a plurality of second insertion slots, arranged alternately; the first insertion tenon of the first insertion part is inserted into the corresponding second insertion slot of the second insertion part, and the second insertion tenon of the second insertion part is inserted into the corresponding first insertion slot of the first insertion part.

[0008] The coupling protective cover described above has an inverted U-shaped top cover, including a top plate and two corner plates. Each corner plate includes a first horizontal plate and a third vertical plate. The first horizontal plates of the two corner plates are connected through the top plate. The lower ends of the third vertical plates of the two corner plates are respectively inserted into the upper ends of the two second vertical plates. The upper end of the second vertical plate includes the first insertion part, and the lower end of the third vertical plate includes the second insertion part. The second insertion part at the lower end of the third vertical plate is inserted into the first insertion part at the upper end of the corresponding second vertical plate.

[0009] The coupling protective cover described above includes a second vertical plate comprising a plurality of vertical plates connected in series vertically; the lower end of the vertical plate includes the second insertion part, and the upper end of the vertical plate includes the first insertion part; the second insertion part of the upper vertical plate is inserted into the first insertion part of the lower vertical plate.

[0010] The coupling protective cover described above has a second insertion part at each end of the top plate, and a first insertion part at the inner end of the first horizontal plate of the two corner plates; the second insertion parts at both ends of the top plate are respectively inserted into the first insertion parts at the inner end of the corresponding first horizontal plate.

[0011] The coupling protective cover described above has a top plate comprising a second horizontal plate and a third horizontal plate. The inner end of the second horizontal plate includes the first insertion part, and the outer end of the second horizontal plate includes the second insertion part. Both ends of the third horizontal plate include the second insertion part. The first insertion part at the inner end of the second horizontal plate is inserted into the second insertion part at the inner end of the third horizontal plate.

[0012] The coupling protective cover described above includes two sets of strap assemblies, which are arranged separately along the main axis of the protective cover; the support is L-shaped and includes a base plate, the inner end of which is connected to the lower end of the first vertical plate; the strap assembly includes a strap and a strap tensioner, the two ends of which are fixed to the corresponding base plates, the middle of which passes over an arched cover plate, and the strap is tensioned by the strap tensioner installed on the strap; the components of the base and the cover plate are injection molded parts.

[0013] The coupling protective cover described above includes a strap pad, which comprises a pad plate and two rows of strap rings fixed to the top surface of the pad plate. The pad plate is laid on top of the cover plate, and the middle of the strap passes through the corresponding row of strap rings, pressing the strap pad against the top of the cover plate. The strap assembly includes two metal strap seats, each strap seat comprising a base plate and a strap pull ring. The base plate includes two outwardly opening, vertically and horizontally permeable strap seat mounting grooves, which are arranged separately along the main axis of the protective cover. The strap seat mounting grooves are located on both sides along the main axis of the protective cover. Each includes a slot, with both ends of the base plate inserted into the corresponding slot along the main axis of the protective cover; the depth of the strap mounting groove is greater than the width of the base plate perpendicular to the main axis of the protective cover, and the depth of the base plate inserted into the strap mounting groove along the main axis of the protective cover is adjusted according to site requirements; the base plate includes fixing screw holes for the base, the fixing screw holes are flat and elongated holes, and the long axis of the flat and elongated holes is parallel to the direction of the main axis of the protective cover; the strap loop is vertically fixed to the inner side of the base plate, and the end of the strap is connected to the corresponding strap loop.

[0014] The coupling protective cover described above includes a base comprising two pull-out oil receiving grooves and two support plates. The first upright plate of the support includes a window corresponding to the oil receiving groove. The inner side of the first upright plate includes a support groove corresponding to the support plate. The support groove is located directly below the corresponding window. The two ends of the support plate are respectively inserted into the support grooves corresponding to the two first upright plates. The bottom surface of the oil receiving groove is supported by the lower edge of the window and the top surface of the support plate.

[0015] The coupling protective cover described above includes a boss in the middle of the support plate, the top surface of which is the top surface of the support plate; each side of the top surface of the boss includes an upwardly protruding guide ridge, the two guide ridges and the top surface of the boss forming a sliding groove for the oil receiving groove; the front and rear of the bottom of the oil receiving groove each include a downwardly protruding positioning protrusion orthogonal to the long axis of the oil receiving groove, and the boss of the support plate is located between the two positioning protrusions along the long axis of the oil receiving groove.

[0016] The cover plate of this utility model coupling protective cover is connected to the base by a plug-in connection. When the coupling needs maintenance, the cover plate can be easily removed from the base. Moreover, after the cover plate is removed, the maintenance space is no longer restricted by the cover plate, which facilitates the maintenance of the coupling. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a front view of the coupling protective cover according to an embodiment of this utility model.

[0019] Figure 2 This is a top view of the coupling protective cover according to an embodiment of this utility model.

[0020] Figure 3 This is a right view of the coupling protective cover according to an embodiment of this utility model.

[0021] Figure 4 yes Figure 1 AA section view in the image.

[0022] Figure 5 This is a front view of the coupling protective cover body according to an embodiment of this utility model.

[0023] Figure 6 This is an exploded view of the coupling protective cover body according to an embodiment of this utility model.

[0024] Figure 7 This is a perspective view of the coupling protective cover body according to an embodiment of the present utility model.

[0025] Figure 8 This is an exploded perspective view of the coupling protective cover body according to an embodiment of this utility model.

[0026] Figure 9 This is a perspective view of the support according to an embodiment of the present utility model.

[0027] Figure 10 This is a top view of the support according to an embodiment of the present utility model.

[0028] Figure 11 This is a perspective view of the strap holder according to an embodiment of the present utility model.

[0029] Figure 12 This is a perspective view of the second upright plate in an embodiment of this utility model.

[0030] Figure 13 This is a perspective view of the corner joint plate of an embodiment of this utility model.

[0031] Figure 14 This is a perspective view of the corner joint plate of this utility model embodiment from another angle.

[0032] Figure 15 This is a perspective view of the second horizontal plate in an embodiment of this utility model.

[0033] Figure 16 This is a perspective view of the tray in an embodiment of this utility model.

[0034] Figure 17 This is a perspective view of the strap pad according to an embodiment of the present invention.

[0035] Figure 18 This is a perspective view of the coupling protective cover of this utility model embodiment, showing that the strap does not pass through the strap pad.

[0036] Figure 19 This is a perspective view of the coupling protective cover strap just passing through the strap pad according to an embodiment of this utility model.

[0037] Figure 20 This is a perspective view of the coupling protective cover fastening strap according to an embodiment of this utility model. Detailed Implementation

[0038] The structure of the coupling protective cover in this embodiment of the utility model is as follows: Figures 1 to 20 As shown, the device includes a base 100 and an arched cover 200. The base 100 includes two symmetrical supports 10 arranged on both sides of the main axis XX of the protective cover. Each support 10 includes a first upright plate 11. The cover 200 includes a top cover 200A and two second upright plates 20. The upper end of the first upright plate 11 is inserted into the lower end of the corresponding second upright plate 20.

[0039] The upper end of the first upright plate 11 includes a first insertion portion M, which includes two first insertion tenons M1 and three first insertion slots M2, arranged alternately. The lower end of the second upright plate 20 includes a second insertion portion N, which includes three second insertion tenons N1 and two second insertion slots N2, arranged alternately. The first insertion tenons M1 of the first insertion portion M are inserted into the corresponding second insertion slots N2 of the second insertion portion N, and the second insertion tenons N1 of the second insertion portion N are inserted into the corresponding first insertion slots M2 of the first insertion portion M.

[0040] The top cover 200A is inverted U-shaped, including a top plate 30 and two corner plates 40. Each corner plate 40 includes a first horizontal plate 41 and a third vertical plate 42. The first horizontal plates 41 of the two corner plates 40 are connected via the top plate 30. The lower ends of the third vertical plates 42 of the two corner plates 40 are respectively inserted into the upper ends of two second vertical plates 20. The upper end of the second vertical plate 20 includes a first insertion part M, and the lower end of the third vertical plate 42 includes a second insertion part N. The second insertion part N at the lower end of the third vertical plate 42 is inserted into the corresponding first insertion part M at the upper end of the second vertical plate 20.

[0041] Each end of the top plate 30 includes a second insertion part N, and the inner end of the first horizontal plate 41 of the two corner plates 40 includes a first insertion part M. The second insertion parts N at both ends of the top plate 30 are respectively inserted into the first insertion parts M at the inner ends of the corresponding first horizontal plates 41.

[0042] The top plate 30 can also be composed of a second horizontal plate 31 and a third horizontal plate 32 connected in series. In this case, the inner end of the second horizontal plate 31 includes a first insertion part M, and the outer end includes a second insertion part N; both ends of the third horizontal plate 32 each include a second insertion part N, and the first insertion part M at the inner end of the second horizontal plate 31 is inserted into the second insertion part N at the inner end of the third horizontal plate 32. The structure and dimensions of the second horizontal plate 31 are the same as those of the second vertical plate 20, and the same components can be used.

[0043] The coupling protective cover of this embodiment of the utility model also includes two sets of strap assemblies 70 and a strap pad 80. The strap pad 80 includes a pad plate 81 and two rows of strap rings 82 fixed to the top surface of the pad plate 81. The two sets of strap assemblies 70 are arranged separately along the main axis XX direction of the protective cover.

[0044] The support 10 is L-shaped and includes a base plate 14, the inner end of which is connected to the lower end of the first upright plate 11. The strap assembly 70 includes a strap 71, a strap tightener 72, and two metal strap seats 73. The strap seat 73 includes a base plate 731 and a strap loop 732. The base plate 14 includes two outwardly opening, vertically and horizontally permeable strap seat mounting grooves 141, which are arranged separately along the main axis XX direction of the protective cover. Each side of the strap seat mounting groove 141 along the main axis XX direction of the protective cover includes a slot 142. The two ends of the base plate 731 along the main axis XX direction of the protective cover are respectively inserted into the corresponding slots 142, fixing the strap seat 73 in the corresponding slots 142. The depth of the strap mounting groove 141 is greater than the width of the base plate 731 in the direction perpendicular to the main axis of the protective cover (XX direction). The depth to which the base plate 731 is inserted into the strap mounting groove 141 in the direction perpendicular to the main axis of the protective cover (XX direction) can be adjusted according to site requirements. The base plate 731 has fixing screw holes 733 for the base 100. The fixing screw holes 733 are flat and elongated holes, with their long axis parallel to the main axis of the protective cover (XX direction). The four fixing screw holes 733 of the coupling protective cover base 100 can be adapted to the mounting holes of coupling protective covers at various longitudinal and transverse distances on the equipment. The strap pull ring 732 is vertically fixed to the inner side of the base plate 731. The end of the strap 71 is connected to the corresponding strap pull ring 732, fixing both ends of the strap 71 to the base plate 14 of the corresponding support 10.

[0045] The pad 81 of the strap pad 80 is laid on top of the cover plate 200. The middle part of the strap 71 wraps around the arched cover plate 200 and passes through a row of strap loops 82 corresponding to the strap pad 80, pressing the strap pad 80 onto the top of the cover plate 200. The strap 71 is tensioned by a strap tensioner 72 installed on the strap 71. The strap 71 and strap tensioner 72 are universal components and can be purchased directly from online shopping platforms. They are widely used in various fields, such as for outdoor equipment: backpacks, tents, etc. used in activities such as mountaineering, camping, and hiking; or for industrial and logistics: for securing goods, packaging, and transportation.

[0046] The base 100 is equipped with two pull-out oil receiving trays 50 and two support plates 60. The first upright plate 11 of the support 10 has two windows 12 corresponding to the oil receiving trays 50. The inner side of the first upright plate 11 has a support groove 13 corresponding to the support plate 60, located directly below the corresponding window 12. The two ends 61 of the support plate 60 are inserted into the corresponding support grooves 13 of the two first upright plates 11. The bottom surface of the oil receiving tray 50 is supported by the lower edge of the window 12 and the top surface of the support plate 60. A handle 52 is located at one end of the oil receiving tray 50. The oil receiving tray 50 serves as a transparent and visible container for collecting and storing leaking oil and waste, effectively preventing environmental pollution caused by oil and liquid leaks from the centrifugal pump packing.

[0047] The tray 60 has a boss 62 in the middle, and the top surface of the boss 62 is the top surface of the tray 60. Each side of the top surface of the boss 62 includes an upwardly protruding guide ridge 63, which, together with the top surface of the boss 62, form a guide groove for the oil receiving groove 50. The bottom surface of the oil receiving groove 50 includes a downwardly protruding positioning ridge 51 at both the front and rear, orthogonal to the long axis of the oil receiving groove 50. The boss 62 of the tray 60, along the long axis of the oil receiving groove 50, is located between the two positioning ridges 51 to position the inserted oil receiving groove 50.

[0048] The second vertical plate 20 of this embodiment can be composed of two (or more) vertical plates connected vertically in series. The lower end of each vertical plate includes a second insertion portion N, and the upper end includes a first insertion portion M. The second insertion portion N at the lower end of the upper vertical plate is inserted into the first insertion portion M at the upper end of the lower vertical plate. By increasing or decreasing the number of connected vertical plates, coupling protective covers of different heights can be obtained from the second vertical plate 20.

[0049] The top plate 30 of this utility model embodiment is composed of a second horizontal plate 31 and a third horizontal plate 32 connected in series. The width of the coupling protective cover can be adjusted by increasing or decreasing the number of the third horizontal plate 32 to obtain coupling protective covers of different widths.

[0050] The support 10, second vertical plate 20, top plate 30, corner joint plate 40, oil receiving groove 50, and support plate 60 of the coupling protective cover in the above embodiments of this utility model are all injection molded parts made of modified engineering plastics, which have explosion-proof, anti-static, and fire-proof functions. They are not only easy to mass-produce, but also can well meet the requirements of Article 10.3.3 of the "Design Specification for Pumps and Machinery for Petrochemical Industry" (GB / T 51007-2014).

[0051] The installation process of the coupling protective cover in the above embodiments of this utility model is as follows: First, assemble the arched cover plate 200, the two support plates 60 and the base 100. Then, fix the base 100 to the base of the equipment with the fixing screws of the base. The arched cover plate 200 is located directly above the equipment coupling. The two oil receiving grooves 50 are pushed into the corresponding windows 12 respectively. The first ends 71A of the straps 71 of the two sets of strap assemblies 70 are connected to the two strap seats 73 on one side of the base 100, respectively. The second ends 71B of the straps 71 of the two sets of strap assemblies 70 connected to the strap tightener 72 are connected to the strap loops 732 of the two strap seats 73 on the other side of the base 100, respectively. Figure 18 As shown; Place the strap pad 80 on the top surface of the top cover 200A, and pass the two straps 71 through the two rows of strap loops 82 on the top surface of the strap pad 81, as follows: Figure 19 As shown; Two straps passing through the strap pad plate 81 and the two rows of strap rings 82 are connected to two strap tighteners 72 respectively. Tightening the two strap tighteners 72 ensures a tight connection between the arched cover plate 200 and the base 100, as well as between the various components of the cover plate 200, completing the installation process of the coupling protective cover. Figure 20 As shown.

[0052] In the above embodiments of this utility model, the cover plate of the coupling protective cover is connected to the base by a plug-in joint. When the coupling needs maintenance, the cover plate can be easily removed from the base. After the cover plate is removed, the maintenance space is not restricted by the cover plate, which facilitates the inspection and maintenance of the pump coupling.

[0053] The second vertical plate 20 of this embodiment can be composed of two (or more) vertical plates connected vertically in series. The lower end of each vertical plate includes a second insertion portion N, and the upper end includes a first insertion portion M. The second insertion portion N at the lower end of the upper vertical plate is inserted into the first insertion portion M at the upper end of the lower vertical plate. By increasing or decreasing the number of connected vertical plates, coupling protective covers of different heights can be obtained from the second vertical plate 20.

[0054] The above embodiments of this utility model have the following beneficial effects: I. Significantly improved ease of inspection and maintenance, which can greatly reduce maintenance costs: The plug-in structure enables unobstructed maintenance: In this embodiment, the base and cover plate, as well as the components of the cover plate, are connected by interlocking tenon and mortise joints (the first plug-in part mates with the second plug-in part). Compared to the protective cover with an access port in the prior art, there is no need to disassemble complex bolts or be limited by the access port frame. During maintenance, the cover plate can be completely removed from the base, creating an unobstructed maintenance space around the coupling. Operators do not need to accommodate the structure of the protective cover and can quickly carry out operations such as coupling disassembly, lubrication, and troubleshooting. Actual testing shows that the maintenance time per operation is reduced by 40%-60% compared to traditional protective covers, making it particularly suitable for the emergency maintenance needs of pump couplings in petrochemical scenarios.

[0055] Modular design facilitates carrying and storage: the second vertical panel of the cover can be formed by connecting multiple vertical panels vertically, and the top panel can be formed by connecting the second and third horizontal panels. After disassembly, each component is compact and the injection-molded parts are lightweight. In confined equipment spaces or high-altitude operation scenarios, operators can move the components piece by piece, avoiding the safety risks of moving a large protective cover as a whole; when not in use, disassembly and storage can save more than 70% of storage space and reduce warehousing management costs.

[0056] II. Excellent structural stability and adaptability, meeting the needs of diverse scenarios: Multiple fixing structures ensure safe operation: Two sets of strap assemblies distributed along the main axis, together with strap pads and metal strap seats, form a three-dimensional fixing system. The straps are guided by strap rings and then evenly wrap around the top of the cover plate. The strap tensioner can precisely adjust the tension, so that the cover plate fits tightly with the base and components, effectively preventing the protective cover from shifting or making abnormal noise due to vibration during equipment operation. The metal strap seat is fixed to the base plate through slots. Compared with traditional welding or bolt connections, it is easy to disassemble and assemble and has a higher load-bearing capacity, which can withstand lateral tensile forces of more than 500N, meeting the safety protection standards in petrochemical scenarios.

[0057] The adjustable design accommodates various coupling specifications: the height of the second vertical plate can be adjusted by adding or removing vertical plates (single vertical plate height selectable from 5-15cm), and the width of the top plate can be adjusted by adding or removing the third horizontal plate (single horizontal plate length selectable from 10-25cm). No separate protective covers are needed for couplings of different sizes, and the compatibility range covers mainstream coupling models with diameters of 100-500mm and lengths of 200-800mm. Simultaneously, the pull-out oil collection tray allows for flexible cleaning based on pump oil leaks. The cooperation between the guide ridges and positioning protrusions ensures smooth and non-displacement of the oil collection tray, preventing oil leakage from contaminating equipment and the ground, and reducing cleaning and maintenance workload.

[0058] III. The materials and processes are adapted to special environments, combining safety and economy: The explosion-proof and anti-static materials meet industry standards: core components such as the base and cover are injection molded from modified engineering plastics, possessing explosion-proof, anti-static, and fire-retardant properties, and their surface resistivity is tested to be ≤10 Ω. 8 With an oxygen index ≥28%, it fully meets the requirement in the "Design Specification for Pumps and Machinery for Petrochemical Industry" (GB / T 51007-2014) that "protective covers in hazardous locations must be made of non-sparking materials". It can be directly applied to Class A and B explosion-proof areas, avoiding safety accidents caused by sparks generated by collisions from traditional metal protective covers.

[0059] Using injection molded components can reduce production costs and time: Compared with the welding and cutting process of metal protective covers, injection molded components can achieve integrated production of components, with a short production cycle and reusable molds. When mass-producing, the cost is 30%-50% lower than that of metal protective covers. At the same time, modified engineering plastics have oil and corrosion resistance properties and a service life of more than 5 years, which is much longer than the 2-3 years of traditional metal protective covers, making them more economical in the long run.

[0060] IV. Simplified installation process, reducing reliance on manual labor: The installation process in this embodiment requires no professional tools or complex skills. Operators only need to complete four steps: "cover plate assembly → base fixing → oil collection tank installation → strap connection". The strap seat is quickly positioned through the slot, without the need for drilling or welding. After the strap pad is laid, it can directly guide the direction of the strap and avoid the strap deviation. The oil collection tank can be pushed in along the guide edge to complete the installation. The entire assembly of the protective cover can be completed by one person within 30 minutes, which greatly reduces the reliance on professional installers and is especially suitable for rapid protection retrofit of on-site equipment.

Claims

1. A coupling protective cover, comprising a base and an arched cover plate, characterized in that, The base includes two supports arranged on both sides of the main axis of the protective cover, and each support includes a first upright plate. The cover plate includes a top cover and two second upright plates. The upper end of the first upright plate is inserted into the lower end of the corresponding second upright plate. The upper end of the first upright plate includes a first insertion part, which includes a plurality of first insertion tenons and a plurality of first insertion slots, which are arranged alternately. The lower end of the second upright plate includes a second insertion part, which includes a plurality of second insertion tenons and a plurality of second insertion slots, which are arranged alternately. The first insertion tenon of the first insertion part is inserted into the corresponding second insertion slot of the second insertion part, and the second insertion tenon of the second insertion part is inserted into the corresponding first insertion slot of the first insertion part.

2. The coupling protective cover according to claim 1, characterized in that, The top cover is inverted U-shaped and includes a top plate and two corner plates. The corner plates include a first horizontal plate and a third vertical plate. The first horizontal plates of the two corner plates are connected through the top plate. The lower ends of the third vertical plates of the two corner plates are respectively inserted into the upper ends of the two second vertical plates. The upper end of the second vertical plate includes the first insertion part, and the lower end of the third vertical plate includes the second insertion part. The second insertion part at the lower end of the third vertical plate is inserted into the first insertion part at the upper end of the corresponding second vertical plate.

3. The coupling protective cover according to claim 2, characterized in that, The second vertical plate includes a plurality of vertical plates connected vertically in series; the lower end of the vertical plate includes the second insertion part, and the upper end of the vertical plate includes the first insertion part; the second insertion part of the upper vertical plate is inserted into the first insertion part of the lower vertical plate.

4. The coupling protective cover according to claim 2, characterized in that, Each end of the top plate includes the second insertion part, and the inner end of the first horizontal plate of the two corner joint plates includes the first insertion part; the second insertion parts at both ends of the top plate are respectively inserted into the first insertion parts at the inner end of the corresponding first horizontal plate.

5. The coupling protective cover according to claim 4, characterized in that, The top plate includes a second horizontal plate and a third horizontal plate. The inner end of the second horizontal plate includes the first insertion part, the outer end of the second horizontal plate includes the second insertion part, and both ends of the third horizontal plate include the second insertion part. The first insertion part at the inner end of the second horizontal plate is inserted into the second insertion part at the inner end of the third horizontal plate.

6. The coupling protective cover according to claim 1, characterized in that, It includes two sets of strap assemblies, which are arranged separately along the main axis of the protective cover; the support is L-shaped and includes a base plate, the inner end of which is connected to the lower end of the first upright plate; the strap assembly includes a strap and a strap tensioner, the two ends of the strap are fixed to the corresponding base plates, the middle of the strap passes over an arched cover plate, and the strap is tensioned by the strap tensioner installed on the strap; the components of the base and the cover plate are injection molded parts.

7. The coupling protective cover according to claim 6, characterized in that, The device includes a strap pad, which comprises a pad plate and two rows of strap loops fixed to the top surface of the pad plate. The pad plate is laid on top of the cover plate, and the middle of the strap passes through the corresponding row of strap loops, pressing the strap pad against the top of the cover plate. The strap assembly includes two metal strap seats, each strap seat comprising a base plate and a strap pull ring. The base plate includes two outwardly opening, vertically and horizontally permeable strap seat mounting grooves, which are arranged separately along the main axis of the protective cover. Each strap seat mounting groove includes an insert on each side along the main axis of the protective cover. The bottom plate is inserted into the corresponding slots at both ends along the main axis of the protective cover; the depth of the mounting groove for the strap seat is greater than the width of the bottom plate perpendicular to the main axis of the protective cover, and the depth of the bottom plate inserted into the mounting groove for the strap seat along the main axis of the protective cover is adjusted according to the site requirements; the bottom plate includes fixing screw holes for the base, the fixing screw holes are flat and elongated holes, and the long axis of the flat and elongated holes is parallel to the direction of the main axis of the protective cover; the strap pull ring is vertically fixed to the inner side of the bottom plate, and the end of the strap is connected to the corresponding strap pull ring.

8. The coupling protective cover according to claim 1, characterized in that, The base includes two pull-out oil receiving grooves and two support plates. The first upright plate of the support includes a window corresponding to the oil receiving groove. The inner side of the first upright plate includes a support groove corresponding to the support plate. The support groove is located directly below the corresponding window. The two ends of the support plate are respectively inserted into the support grooves corresponding to the two first upright plates. The bottom surface of the oil receiving groove is supported by the lower edge of the window and the top surface of the support plate.

9. The coupling protective cover according to claim 8, characterized in that, The pallet includes a boss in the middle, and the top surface of the boss is the top surface of the pallet; each side of the top surface of the boss includes an upwardly protruding guide ridge, and the two guide ridges and the top surface of the boss form a groove for the oil receiving groove; the front and rear of the bottom of the oil receiving groove each include a downwardly protruding positioning protrusion that is orthogonal to the long axis of the oil receiving groove, and the boss of the pallet is located between the two positioning protrusions along the long axis of the oil receiving groove.

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