Waterproof frequency converter housing

Abstract

The utility model discloses a waterproof frequency converter housing, comprising a front housing, a rear housing, a multi-stage sealing groove, and a multi-stage plug board, the multi-stage plug board is arranged along the circumferential direction of the end face covered by the front housing, and the multi-stage sealing groove is arranged along the circumferential direction of the end face covered by the rear housing. The multistage plug boards are correspondingly plugged in the multistage sealing grooves and are fixedly installed through bolts, thereby solving the neglect of a sealing waterproof structure at a butt joint end face in the prior art, and improving the sealing waterproof function of the frequency converter housing. According to the frequency converter shell, the heat dissipation sealing plate is installed in the rear shell in a sealed mode, the rear shell is sealed through the heat dissipation sealing plate and the front shell, a sealing cavity is formed in the rear shell, waterproof sealing protection of components in the frequency converter shell is achieved, and heat dissipation protection of the components is improved through the heat dissipation function of the heat dissipation sealing plate.

Description

Technical Field

[0001] The utility model relates to the technical field of calibration of rope-drawing type length sensors, and particularly relates to a waterproof inverter housing. Background Art

[0002] A variable frequency drive (VFD) is a power control device that applies frequency conversion technology and microelectronics technology to control an alternating current motor by changing the frequency of the motor's working power supply. The VFD mainly consists of a rectifier (AC to DC), a filter, an inverter (DC to AC), a braking unit, a drive unit, a detection unit, a microprocessing unit, etc.

[0003] Publication (Announcement) Number: CN209105018, a waterproof inverter housing structure, which can effectively improve the waterproof and dustproof effects and ensure the sealing performance. The housing includes a front housing and a rear housing that are spliced together. A circuit board mounting plate is installed in the middle of the rear housing. A middle heat dissipation through hole is opened in the middle of the circuit board mounting plate. Heat sink mounting holes are provided at the middle heat dissipation through hole. A capacitor mounting groove with an opening facing the front housing is installed on one side of the circuit board mounting plate. No through holes are provided around the rear housing in the front side area of the circuit board mounting plate. A heat dissipation hole is opened on one side wall of the housing in the rear side area of the circuit board mounting plate.

[0004] In the prior art:

[0005] First, only the waterproof structure of the inverter is improved at the heat dissipation hole, and the sealing structure of the large-scale docking part between the front housing and the rear housing is not improved, which easily causes poor sealing performance of the waterproof structure at the large-scale docking part between the front and rear housings, and further causes poor waterproof function of the inverter.

[0006] Second, the waterproof sealing structure level of the inverter is single, and multi-level sealing and waterproof protection of the inverter housing cannot be achieved.

[0007] Therefore, a waterproof inverter housing needs to be provided. Summary of the Utility Model

[0008] Aiming at the problems existing in the above prior art, the utility model provides a waterproof inverter housing, aiming to improve the calibration efficiency of the rope-drawing type length calibration and improve the calibration accuracy of the product, and avoid inaccurate length measurement parameters of the product.

[0009] To achieve the above object, the utility model is realized through the following technical solutions: A waterproof frequency converter housing, including a front housing, a rear housing, a multi-stage sealing groove, and a multi-stage plug-in board. A multi-stage plug-in board is arranged circumferentially along the end face of the front housing for covering, and a multi-stage sealing groove is arranged circumferentially along the end face of the rear housing for covering. When the front housing and the rear housing are covered and docked, the multi-stage plug-in board is correspondingly inserted into the multi-stage sealing groove and fixed by bolts. The multi-stage plug-in board includes a first-stage plug-in board arranged circumferentially around the outer periphery of the end face of the front housing, and a second-stage plug-in board arranged circumferentially inside the front housing. The end face of the rear housing is provided with a first-stage sealing groove corresponding to the insertion position of the first-stage plug-in board, and a second-stage sealing groove corresponding to the insertion position of the second-stage plug-in board. A threaded hole two is opened along the circumference inside the first-stage sealing groove, and threaded holes one are distributed circumferentially at the first-stage plug-in board of the front housing. After the front housing and the rear housing are covered, the threaded holes one and the threaded holes two are installed with bolts to fixedly install the front housing and the rear housing. A heat dissipation sealing plate is hermetically installed inside the rear housing. The rear housing is sealed by the heat dissipation sealing plate and the front housing, so that a sealed cavity is formed inside the rear housing.

[0010] Preferably, a support frame is arranged circumferentially inside the rear housing. Positioning grooves are distributed at the four corners of the support frame. The surface of the heat dissipation sealing plate corresponding to the positioning grooves is provided with positioning posts, and the positioning posts are inserted into the positioning grooves.

[0011] Preferably, threaded holes three are distributed around the support frame. A slot hole one is opened at the surface position of the heat dissipation sealing plate corresponding to the threaded holes three. The threaded holes three and the slot hole one are installed with bolts to fixedly install the heat dissipation sealing plate on the support frame.

[0012] Preferably, a heat dissipation channel is formed by enclosing the rear part of the rear housing and the heat dissipation sealing plate. The heat dissipation channel is provided with heat dissipation through holes and a fan assembly.

[0013] Preferably, the first-stage plug-in board and the second-stage plug-in board are distributed in a gradient manner, and the height dimension of the second-stage plug-in board is greater than that of the first-stage plug-in board.

[0014] In summary, the present utility model provides a waterproof frequency converter housing. On the butt joint end face of the rear housing, a first-level sealing groove and a second-level sealing groove are sequentially arranged from outside to inside. The corresponding first-level plugging board one is hermetically plugged and installed with the first-level sealing groove, and the second-level plugging board two is hermetically plugged and installed with the second-level sealing groove. A second threaded hole is opened inside the first-level sealing groove, and a first threaded hole is opened on the first-level plugging board one. The first threaded hole and the second threaded hole are fixedly installed through bolts, so as to realize a multi-level sealing installation structure at the butt joint end face of the front housing and the rear housing, solve the neglect of the sealing and waterproof structure at the butt joint end face in the prior art, and improve the sealing and waterproof function of the frequency converter housing; by hermetically installing a heat dissipation sealing plate inside the rear housing, and through the heat dissipation sealing plate and the front housing to seal the rear housing, a sealed cavity is formed inside the rear housing, realizing the waterproof and sealed protection of the internal components of the frequency converter housing, and through the heat dissipation function of the heat dissipation sealing plate, improving the heat dissipation protection of the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a schematic structural diagram of the frequency converter housing of the present utility model;

[0016] Figure 2 FIG. is a schematic structural diagram of the front housing and the rear housing of the present utility model in a closed and dissected state;

[0017] Figure 3 FIG. is of the present utility model Figure 2 Schematic cross-sectional dissection structure diagram of the middle view;

[0018] Figure 4 FIG. is a schematic structural diagram of the heat dissipation sealing plate and the support frame in the rear housing of the present utility model;

[0019] Figure 5 FIG. is an exploded structural dissection schematic diagram of the heat dissipation sealing plate and the support frame of the present utility model;

[0020] Figure 6 FIG. is a schematic diagram of the fixed structure of the exploded structure of the heat dissipation sealing plate and the support frame of the present utility model;

[0021] In the figure: front housing 1, rear housing 2, multi-level sealing groove 3, multi-level plugging board 4, first-level plugging board one 5, second-level plugging board two 6, first-level sealing groove 7, second-level sealing groove 11, second threaded hole 12, first threaded hole 13, heat dissipation sealing plate 14, support frame 15, positioning groove 16, positioning post 17, third threaded hole 21, first slot hole 22, heat dissipation channel 23, heat dissipation through hole 24, fan assembly 25. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present utility model will be further described below with reference to the accompanying drawings.

[0023] As Figures 1 to 6 shown:

[0024] The utility model relates to a waterproof frequency converter shell, which comprises a front shell 1, a rear shell 2, a multi-stage sealing groove 3, and a multi-stage plug-in board 4. The multi-stage plug-in board 4 is arranged circumferentially along the end face where the front shell 1 is closed, and the multi-stage sealing groove 3 is arranged circumferentially along the end face where the rear shell 2 is closed. When the front shell 1 and the rear shell 2 are closed and butted, the multi-stage plug-in board 4 is correspondingly inserted into the multi-stage sealing groove 3 and fixedly installed by bolts. The multi-stage plug-in board 4 includes a first-stage plug-in board 5 arranged circumferentially around the outer periphery of the end face of the front shell 1, and a second-stage plug-in board 6 arranged circumferentially inside the front shell 1. The end face of the rear shell 2 is provided with a first-stage sealing groove 7 corresponding to the insertion position of the first-stage plug-in board 5, and the end face of the rear shell 2 is provided with a second-stage sealing groove 11 corresponding to the insertion position of the second-stage plug-in board 6. A second threaded hole 12 is opened along the circumference inside the first-stage sealing groove 7, and a first threaded hole 13 is distributed circumferentially at the position of the first-stage plug-in board 5 on the front shell 1. After the front shell 1 and the rear shell 2 are closed, the first threaded hole 13 and the second threaded hole 12 are installed with bolts to fixedly install the front shell 1 and the rear shell 2. A heat dissipation sealing plate 14 is hermetically installed inside the rear shell 2, and the rear shell 2 is sealed by the heat dissipation sealing plate 14 and the front shell 1 to form a sealed cavity inside the rear shell 2.

[0025] To solve the technical problem that the waterproof sealing effect at the butting end faces of the front shell 1 and the rear shell 2 in the prior art is not good, the structure adopted in this patent is as follows: at the butting end faces of the front shell 1 and the rear shell 2, a multi-stage sealing groove 3 and a multi-stage plug-in board 4 are used for plugging and mating installation, and then fixedly installed by bolts, which further strengthens the waterproof function of the sealing reinforcement; specifically, the connection end face of the front shell 1 is sequentially arranged as a first-stage plug-in board 5 and a second-stage plug-in board 6 from outside to inside, and the butting end face of the rear shell 2 is sequentially arranged as a first-stage sealing groove 7 and a second-stage sealing groove 11 from outside to inside. The corresponding first-stage plug-in board 5 and the first-stage sealing groove 7 are hermetically plugged and installed, and the second-stage plug-in board 6 and the second-stage sealing groove 11 are hermetically plugged and installed. A second threaded hole 12 is opened inside the first-stage sealing groove 7, and a first threaded hole 13 is opened on the first-stage plug-in board 5. The first threaded hole 13 and the second threaded hole 12 are fixedly installed with bolts to realize a multi-stage sealing installation structure at the butting end faces of the front shell 1 and the rear shell 2, solve the neglect of the sealing and waterproof structure at the butting end faces in the prior art, and improve the waterproof sealing function of the frequency converter shell; by hermetically installing a heat dissipation sealing plate 14 inside the rear shell 2, the rear shell 2 is sealed by the heat dissipation sealing plate 14 and the front shell 1 to form a sealed cavity inside the rear shell 2, realizing the waterproof sealing protection of the internal components of the frequency converter shell, and improving the heat dissipation protection of the components through the heat dissipation function of the heat dissipation sealing plate 14.

[0026] In at least one embodiment, in order to achieve the sealed installation of the heat dissipation sealing plate 14 and the rear housing 2, the adopted structure is as follows: a support frame 15 is circumferentially arranged inside the rear housing 2, positioning grooves 16 are respectively formed at the four corners of the support frame 15, positioning posts 17 are arranged on the surface of the heat dissipation sealing plate 14 corresponding to the positioning grooves 16, and the positioning posts 17 are inserted into the positioning grooves 16. Threaded holes three 21 are respectively formed around the support frame 15, a slot hole one 22 is formed at the surface position of the heat dissipation sealing plate 14 corresponding to the threaded holes three 21, and the threaded holes three 21 and the slot hole one 22 are installed through bolts to fixedly install the heat dissipation sealing plate 14 on the support frame 15.

[0027] Specifically: positioning posts 17 are arranged at the four corners of the heat dissipation sealing plate 14, positioning grooves 16 are respectively formed at the four corners of the support frame 15, threaded holes three 21 are respectively formed around the support frame 15, a slot hole one 22 is formed at the surface position of the heat dissipation sealing plate 14 corresponding to the threaded holes three 21. During the sealed installation, first, the positioning installation is carried out through the positioning posts 17 and the positioning grooves 16, and then the threaded holes three 21 and the slot hole one 22 are fixedly installed by bolts, so as to fixedly install the heat dissipation sealing plate 14 on the support frame 15 and form a sealed cavity inside the rear housing 2.

[0028] In at least one embodiment, in order to achieve the heat dissipation treatment of the frequency converter housing, a heat dissipation channel 23 is formed by enclosing the rear of the rear housing 2 and the heat dissipation sealing plate 14. The heat dissipation channel 23 is provided with heat dissipation through holes 24 and a fan assembly 25; heat dissipation is achieved through the cooperation of the fan assembly 25 and the heat dissipation through holes 24, so as to improve the heat dissipation treatment of the frequency converter housing.

[0029] In at least one embodiment, in order to enhance the sealing and waterproof function at the butt end face of the front housing 1 and the rear housing 2, the adopted structure is as follows: the first-stage plugging plate one 5 and the second-stage plugging plate two 6 are distributed in a gradient manner, and the height dimension of the second-stage plugging plate two 6 is greater than that of the first-stage plugging plate one 5.

[0030] The embodiments in the present utility model are only used to illustrate the present utility model and do not constitute a limitation on the scope of the claims. Other substantially equivalent alternatives that can be conceived by those skilled in the art are all within the protection scope of the present utility model.

Claims

1. A waterproof inverter housing, characterized in that: The invention comprises a front shell (1), a rear shell (2), a multi-stage sealing groove (3), and a multi-stage plug-in board (4). The multi-stage plug-in board (4) is arranged along the circumference of the end surface of the front shell (1), and the multi-stage sealing groove (3) is arranged along the circumference of the end surface of the rear shell (2). When the front shell (1) and the rear shell (2) are covered and docked, the multi-stage plug-in board (4) is correspondingly plugged into the multi-stage sealing groove (3) and fixedly installed by bolts. The multi-stage plug-in board (4) comprises a first-stage plug-in board (5) arranged along the outer circumference of the end surface of the front shell (1), a second-stage plug-in board (6) arranged along the inner circumference of the front shell (1), and a first-stage sealing groove is provided at the plugging position of the end surface of the rear shell (2) corresponding to the first-stage plug-in board (5). (7), a secondary sealing groove (11) is formed at the end surface of the rear housing (2) corresponding to the plug-in position of the secondary plug-in board (6), and a threaded hole (12) is formed inside the primary sealing groove (7) along its circumference. The front housing (1) is provided with a threaded hole (13) distributed along the circumference at the primary plug-in board (5). After the front housing (1) and the rear housing (2) are covered, the threaded hole (13) and the threaded hole (12) are installed by bolts to fix the front housing (1) and the rear housing (2). A heat dissipation sealing plate (14) is installed inside the rear housing (2) to seal the rear housing (2). The heat dissipation sealing plate (14) and the front housing (1) are used to seal the rear housing (2) so that a sealed cavity is formed inside the rear housing (2).

2. A waterproof inverter housing according to claim 1, characterized in that: A support frame (15) is arranged in the inner circumference of the rear housing (2), positioning grooves (16) are arranged at four corners of the support frame (15), and positioning columns (17) are arranged on the surface of the heat dissipation sealing plate (14) corresponding to the positioning grooves (16), and the positioning columns (17) are plugged into the positioning grooves (16).

3. A waterproof inverter housing according to claim 2, characterized in that: The support frame (15) is provided with threaded holes (21) distributed around the periphery, and the heat dissipation sealing plate (14) is provided with slotted holes (22) at surface positions corresponding to the threaded holes (21). The threaded holes (21) and the slotted holes (22) are mounted by bolts to fix the heat dissipation sealing plate (14) on the support frame (15).

4. The waterproof inverter housing according to claim 1, characterized in that: The rear portion of the rear housing (2) and the heat dissipation sealing plate (14) are combined to form a heat dissipation channel (23), and the heat dissipation channel (23) is provided with a heat dissipation through hole (24) and a fan assembly (25).

5. The waterproof inverter housing according to claim 1, characterized in that: The first level plug board 1 (5) and the second level plug board 2 (6) are distributed in a gradient manner, and the height dimension of the second level plug board 2 (6) is greater than that of the first level plug board 1 (5).

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