CN115117677A - Water-frequency converter and assembling method thereof - Google Patents

Abstract

The invention discloses a water down converter and an assembly method thereof, wherein the water down converter comprises a shell, two ends of the shell are provided with openings, the openings are provided with internal threads, and the side surface of the shell is provided with a mounting groove and a first threaded hole; a circuit assembly installed inside the case; the side surfaces of the two end covers are provided with external threads, the two end covers are respectively in one-to-one corresponding threaded connection with the two ends of the shell, and the length of the internal threads is greater than the thickness of the end covers; the conductive column penetrates through the end cover and is fixedly connected with the end cover, and is used for realizing the electrical connection between the circuit component and the submersible pump; the screw penetrates through the mounting groove and the first threaded hole in sequence and is in threaded connection with the circuit assembly, and a gap is formed between the first threaded hole and the screw. According to the invention, the sealing performance of the frequency converter is improved, so that the frequency converter and the submersible pump can be discharged together, and the electric connection distance between the frequency converter and the submersible pump is reduced; and moreover, the threaded hole and the end cover are filled with the sealant, so that the threaded sealing effect is achieved, and the underwater sealing performance of the frequency converter can be improved.

Description

Water-frequency converter and assembling method thereof

Technical Field

The invention relates to a water-frequency converter and an assembling method thereof in the technical field of frequency converters.

Background

The submersible pump is a device for pumping water from deep well. When in use, the submersible pump is submerged to work, and the impeller rotates to extract underground water to the ground surface, so that the submersible pump is common equipment in the fields of mine emergency rescue, industrial cooling, farmland irrigation, seawater lifting, ship load regulation and the like. Because the submersible pump is relatively powerful, a frequency converter system adapted to the submersible pump is generally provided to supply electrical energy to the submersible pump.

At present, the converter setting scheme commonly used is for installing the converter in the bank, sets up with immersible pump separation, and the electricity is connected through the long cable between the two to can reduce sealed and the protection requirement to the converter.

However, for the operation condition in the deep sea field, the deeper the submersible pump is submerged, the longer the cable needs to be, so that the communication cost of the frequency converter and the submersible pump is increased; in addition, the electric energy is lost or easily interfered in the transmission process, so that the submersible pump is unstable, and the normal work of the submersible pump is influenced.

Disclosure of Invention

The invention aims to solve at least one technical problem in the prior art, and provides a water down converter and an assembly method thereof, which can be used for draining water along with a submersible pump, reduce the communication cost with the submersible pump and have good sealing property.

According to an embodiment of the first aspect of the present invention, there is provided a water down converter, including:

the device comprises a circular tubular shell, wherein openings are formed in two ends of the shell, internal threads are formed in the openings, an installation groove is formed in the side face of the shell, and the tail end of the installation groove is communicated with a first threaded hole;

a circuit assembly mounted inside the case;

the number of the end covers is two, the side faces of the end covers are provided with external threads, the two end covers are respectively arranged in one-to-one correspondence with the two ends of the shell, the external threads are matched with the internal threads and connected with the internal threads in a threaded manner, and the length of the internal threads is greater than the thickness of the end covers;

the conductive column penetrates through the end cover and is fixedly connected with the end cover, one end of the conductive column is electrically connected with the circuit assembly, and the other end of the conductive column is used for being electrically connected with the submersible pump;

the screw penetrates through the mounting groove and the first threaded hole in sequence and is in threaded connection with the circuit assembly, and a gap is formed between the first threaded hole and the screw.

According to an embodiment of the first aspect of the present invention, further, the casing is an aluminum alloy piece.

According to the embodiment of the first aspect of the present invention, further, a mounting table is disposed on an inner side surface of the casing, a surface of the mounting table is a plane, and the first threaded hole penetrates through the surface of the mounting table.

According to the embodiment of the first aspect of the present invention, the water down converter further includes an adapter plate, one side of the adapter plate is connected to the circuit component, the other side of the adapter plate is attached to the surface of the mounting table, the adapter plate is provided with a second threaded hole, and the screw is matched with the second threaded hole and in threaded connection with the second threaded hole.

According to an embodiment of the first aspect of the present invention, further, the center of the end cover is provided with a prismatic hole, and the prismatic hole is used for being matched with an assembling tool.

According to an embodiment of the first aspect of the present invention, further, the conductive post and the end cap are connected by a screw thread.

According to an embodiment of the first aspect of the present invention, further, fixing bolts are screwed to both ends of the conductive column, and the fixing bolts are used for fixing electric wires.

According to an embodiment of the first aspect of the present invention, each of two ends of the conductive column is provided with a terminal, and the terminal is in a tubular shape and is used for passing through and fixing an electric wire.

According to a second aspect of the present invention, there is provided an assembling method of a water down converter, including:

placing the circuit assembly within the enclosure;

smearing sealing glue in the first threaded hole;

the screw penetrates through the first threaded hole and is screwed with the circuit assembly, and the sealant fills a gap between the first threaded hole and the screw;

pouring the sealant in the mounting groove to enable the sealant to cover the screw;

electrically connecting the circuit assembly to the conductive post via an electrical wire;

mounting and tightening the end cap to the opening;

the conductive column is electrically connected with the submersible pump through an electric wire;

pouring the sealant on the end cover to enable the sealant to cover the end cover;

and after the sealant is solidified, finishing assembly.

According to the embodiment of the second aspect of the present invention, before screwing, the end cap is first rotated in the unscrewing direction and then screwed into the opening, so as to reduce mutual twisting of the wires.

The embodiment of the invention has the beneficial effects that: according to the invention, by improving the sealing performance of the frequency converter, the frequency converter and the submersible pump can be launched together, and the electric connection distance between the frequency converter and the submersible pump is reduced; and moreover, the threaded hole and the end cover are filled with the sealant, so that the threaded sealing effect is achieved, and the underwater sealing performance of the frequency converter can be improved.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings described are only some embodiments of the invention, not all embodiments, and that those skilled in the art will be able to derive other designs and drawings from them without inventive effort.

FIG. 1 is an external view of an embodiment of the first aspect of the present invention;

FIG. 2 is an internal diagram of an embodiment of the first aspect of the present invention;

FIG. 3 is a block diagram of a housing in an embodiment of a first aspect of the invention;

FIG. 4 is a front view of the end cap in an embodiment of the first aspect of the invention;

FIG. 5 is a cross-sectional view of an embodiment of the first aspect of the present invention;

FIG. 6 is a partial enlarged view of area A in FIG. 5;

fig. 7 is a partially enlarged view of the region B in fig. 5.

Reference numerals are as follows: 100-machine shell, 110-opening, 111-internal thread, 120-mounting groove, 121-first threaded hole, 130-mounting table, 200-circuit component, 300-end cover, 310-external thread, 320-prismatic hole, 400-conductive column, 410-fixing bolt, 420-wiring terminal, 500-screw, 510-clearance, 600-adapter plate and 610-second threaded hole.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

The embodiment of the first aspect of the invention provides a down converter which is integrally cylindrical and is convenient to be matched with a submersible pump and then submerge to underwater operation. A plurality of conductive columns are arranged at two ends of the water down converter, so that the water down converter can be electrically connected with a submersible pump. Because this water down converter and immersible pump are together with the operation of launching, need not long distance cable connection between the two, reduce the required cost of setting up the cable, also can reduce the disturbance that external environment caused long distance cable.

Because this underwater converter needs to carry out underwater work, consequently has higher requirement to its leakproofness. The shell is connected with the end cover through threads, so that the requirement on connection strength is met, later-period disassembly and maintenance are facilitated, and the threaded connection mode has better waterproof performance; and a layer of sealant is further covered on the end cover, so that the sealing performance of the end cover is improved. The mounting groove on the side surface of the machine shell is also sealed in a mode of combining threaded connection and gluing sealing.

The embodiment of the second aspect of the invention provides an assembling method of a water down converter, and a pointer is used for assembling the water down converter, so that the water down converter has better sealing performance to perform underwater operation.

Description figure 1 shows an appearance diagram of the water down converter. The whole body is cylindrical, the casing 100 is in a circular tube shape and is used for being matched with a submersible pump, meanwhile, the cylindrical structure can better resist underwater pressure, and deformation of the casing 100 caused by overlarge pressure is reduced. The cabinet 100 is provided at both ends thereof with end caps 300 for closing the internal structure of the cabinet 100.

Description fig. 2 shows an internal structure of the downconverter, and the housing 100 is hidden to better observe the internal structure of the downconverter. Inside the housing 100, a circuit assembly 200, specifically an assembly of a circuit board, a capacitor and related circuit components, is disposed for performing frequency conversion. The circuit assembly 200 is connected to the chassis 100 through the adapter plate 600, specifically, the screw 500 is screwed to the adapter plate 600 after passing through the chassis 100, and the circuit assembly 200 is mounted on the adapter plate 600 by screwing or bonding.

The side of the end cap 300 is provided with external threads 310 which are adapted to and threadedly coupled with the internal threads 111 (see fig. 3) of the housing. A plurality of conductive posts 400, specifically copper posts, are further mounted on the end cap 300 for electrically connecting the circuit assembly 200 to an external submersible pump. In order to fix the electric wire and prevent the electric wire from deviating and falling off from the conductive post 400 under the impact of external force, the terminals 420 are disposed at both ends of the conductive post 400. The terminal 420 extends outward and is provided with a tubular structure through which the electric wire can be fixed with the conductive post 400, thereby restricting the movement of the electric wire by the tubular structure.

Description fig. 3 shows a structural view of the cabinet 100. The inner part of the casing 100 is provided with the mounting platform 130, the surface of which is a plane, so that the mounting platform can be attached to the adapter plate 600, the contact area between the mounting platform and the adapter plate 600 is increased, and the connection between the mounting platform and the adapter plate is more stable. The casing 100 is further provided with a first threaded hole 121, and the first threaded hole 121 penetrates through the surface of the mounting table 130 for allowing the screw 500 to penetrate through and be in threaded connection with the adapter plate 600.

Description figure 4 shows a front view of the end cap 300. The center of the end cap 300 is provided with a prismatic hole 320, specifically a square counter bore, for being adapted to an assembling tool and driving the end cap 300 to rotate by using the prismatic hole 320 as a stress structure. In the present application, the assembling tool refers to an auxiliary screwing tool such as a quadrangular wrench, a hexagonal wrench, or the like.

Description figure 5 shows a cross-sectional view of the present water downconverter. The length of the internal thread 111 is greater than the thickness of the end cover 300, so that after the end cover 300 is screwed down, part of the internal thread 111 is still exposed outside, and when sealant is poured subsequently, the sealant permeates into the internal thread 111, the friction force between the sealant and the casing 100 is enhanced, and meanwhile, the sealing performance of the joint of the sealant and the casing 100 is further improved.

Fig. 6 is an enlarged view of a portion of a region a in fig. 5, and shows a specific structure of the conductive pillar 400. Both ends of the conductive post 400 are connected with fixing bolts 410 through threads, the end of the electric wire is provided with a C-shaped metal buckle, the C-shaped metal buckle can be clamped between the fixing bolts 410 and the conductive post 400, and the electric wire can be fixed on the conductive post 400 to realize electric connection after the fixing bolts 410 are screwed. Meanwhile, the terminal 420 is also fixed to the end of the conductive post 400 by the fixing bolt 410.

Fig. 7 is an enlarged view of a portion of the area B of fig. 5, showing the attachment of the screw 500. When the adapter plate is connected, the screw 500 enters from the mounting groove 120 and passes through the first threaded hole 121 to contact with the adapter plate 600. The nominal diameter of the first threaded hole 121 is greater than the nominal diameter of the screw 500, the first threaded hole and the screw are not in threaded connection, and a gap 510 is left between the first threaded hole and the screw, so that the first threaded hole and the screw are conveniently filled with sealant to realize sealing. The adapter plate 600 is provided with a second threaded hole 610, which is adapted to the screw 500 and can be screwed, so that the adapter plate 600 can be fixed inside the casing 100 when the screw 500 is tightened.

Referring to fig. 1 to 2, a downconverter in accordance with an embodiment of the present invention includes a housing 100, a circuit assembly 200, an end cap 300, a conductive post 400, and a screw 500. The casing 100 is a main structural member of the down converter, and has a circular tube shape, which plays roles of protecting internal components and dissipating heat. Specifically, the chassis 100 is made of an aluminum alloy material, which has good heat dissipation performance, thereby promoting heat dissipation of the internal circuit assembly 200 while satisfying sealing performance; and has better structural strength, thereby being capable of bearing the high-pressure environment of deep water without deformation. Referring to fig. 3, the two ends of the casing 100 are provided with openings 110, the openings 110 are provided with internal threads 111, and the side surface of the end cap 300 is provided with external threads 310 that can be adapted to the openings, so that the end cap 300 can be connected with the casing 100 through threads, and has strong connection strength and good waterproof performance. Specifically, the length of the internal thread 111 is greater than the thickness of the end cap 300, so that after the end cap 300 is screwed, the internal thread 111 can still be partially exposed, and the sealant can be conveniently poured on the surface of the end cap 300 in a subsequent step.

The end cap 300 is made of a plastic material or an insulating composite material, and can meet the requirement of electrical safety.

Referring to fig. 5, the circuit assembly 200 includes a circuit board, a capacitor and related circuit elements, which are used for frequency conversion and are hidden in the casing 100. Specifically, referring to fig. 7, the side surface of the casing 100 is provided with a mounting groove 120, the end of which is communicated with a first threaded hole 121, and the nominal diameter of the first threaded hole 121 is larger than that of the screw 500. In some embodiments, the circuit assembly 200 is provided with a threaded hole adapted to the screw 500 for threaded connection, and the screw 500 sequentially passes through the mounting groove 120 and the first threaded hole 121 and then is connected to a corresponding threaded hole of the circuit assembly 200. In this embodiment, the downconverter further includes an adapter plate 600, the circuit module 200 is fixedly connected to the adapter plate 600, a second threaded hole 610 capable of being adapted to the screw 500 and being in threaded connection with the adapter plate 600 is formed in the adapter plate 600, and the screw 500 sequentially passes through the mounting groove 120 and the first threaded hole 121 and then is connected to the second threaded hole 610. Through setting up keysets 600, can further promote this down converter's sealing performance.

A gap 510 is left between the first threaded hole 121 and the screw 500, so that when the sealant is applied to the first threaded hole 121 and the screw 500 is tightened, the sealant can fill the gap 510. Both sides of the gap are threads, and after the sealant is filled in the gap and solidified, when external liquid or gas flows through the wavy thread-sealant junction surface and permeates inwards, the energy is attenuated continuously and blocked finally, so that the external liquid or gas can be effectively blocked from entering the interior of the casing 100.

The number of the conductive posts 400 is plural, and all the conductive posts penetrate the end cap 300 and are fixedly connected with the end cap 300. The conductive column 400 is specifically a copper column, one end of which is electrically connected to the circuit assembly 200, and the other end of which is used for being electrically connected to the submersible pump, so as to electrically connect the circuit assembly 200 to the external submersible pump.

Further, the inner side surface of the casing 100 is provided with a mounting table 130, the surface of which is a plane for bearing the adapter plate 600, and the first threaded hole 121 penetrates through the surface of the mounting table 130. During installation, the adapter plate 600 is attached to the surface of the installation table 130, so that the contact area between the adapter plate 600 and the installation table is increased, and the adapter plate 600 is installed more stably.

Further, referring to fig. 4, a prismatic hole 320 is formed in the center of the end cap 300, and is adapted to an assembling tool, and the prismatic hole 320 is used as a point of force to screw the end cap 300, so that the end cap 300 can be conveniently disassembled and assembled.

Further, it is connected through threaded connection to lead electrical pillar 400 and end cover 300, makes things convenient for the dismouting also to have better waterproof performance.

Further, referring to fig. 6, fixing bolts 410 are disposed at two ends of the conductive pillar 400, and the fixing bolts 410 are in threaded connection with the conductive pillar 400 for fixing the electric wire. Specifically, the end of the electric wire is provided with a "C" shaped metal buckle, and after the "C" shaped metal buckle is inserted between the conductive post 400 and the fixing bolt 410, the fixing bolt 410 is tightened and clamped, so that the electric wire can be fixed.

Further, the two ends of the conductive pillar 400 are both provided with the connection terminals 420, and are also fixed at the end of the conductive pillar 400 by the fixing bolts 410. The wire terminals 420 are extended outwardly and have a tubular shape for passing the electric wires therethrough to define the positions of the electric wires.

The method for assembling the water down converter in the second aspect embodiment of the present invention includes the following steps:

s1, placing a circuit assembly 200 in a machine shell 100 to prepare for installation;

s2, smearing sealing glue in the first threaded hole 121;

s3, the screw 500 penetrates through the first threaded hole 121 and is screwed with the circuit assembly 200, and the sealant fills a gap between the first threaded hole 121 and the screw 500 to realize thread sealing;

s4, pouring sealant into the mounting groove 120, so that the bolt 500 is covered by the sealant, and the sealing performance is further improved;

s5, electrically connecting the circuit assembly 200 with the conductive column 400 through an electric wire;

s6, mounting the end cover 300 to the opening 110 and screwing;

s7, conducting electric connection between the conducting column 400 and the submersible pump through electric wires;

s8, pouring sealant on the end cover 300 to enable the sealant to cover the end cover 300;

and S9, after the sealant is solidified, assembling.

Further, before the end cap 300 is screwed, the end cap is rotated in an unscrewing direction, and is inserted into the opening 110 and then screwed, thereby reducing the degree of mutual entanglement of the wires during screwing.

While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.

Claims (10)

1. A water downconverter, comprising:

the device comprises a circular tubular shell, a first threaded hole and a second threaded hole, wherein openings are formed in two ends of the circular tubular shell, internal threads are arranged on the openings, an installation groove is formed in the side face of the shell, and the tail end of the installation groove is communicated with the first threaded hole;

a circuit assembly mounted inside the case;

the number of the end covers is two, the side faces of the end covers are provided with external threads, the two end covers are respectively arranged in one-to-one correspondence with the two ends of the shell, the external threads are matched with the internal threads and connected with the internal threads in a threaded manner, and the length of the internal threads is greater than the thickness of the end covers;

the conductive column penetrates through the end cover and is fixedly connected with the end cover, one end of the conductive column is electrically connected with the circuit assembly, and the other end of the conductive column is used for being electrically connected with the submersible pump;

the screw penetrates through the mounting groove and the first threaded hole in sequence and is in threaded connection with the circuit assembly, and a gap is formed between the first threaded hole and the screw.

2. The water downconverter of claim 1, wherein: the casing is an aluminum alloy part.

3. The water downconverter of claim 1, wherein: the inner side surface of the shell is provided with an installation platform, the surface of the installation platform is a plane, and the first threaded hole penetrates through the surface of the installation platform.

4. The water downconverter of claim 3 wherein: the water down converter further comprises an adapter plate, one side of the adapter plate is connected with the circuit assembly, the other side of the adapter plate is attached to the surface of the mounting table, a second threaded hole is formed in the adapter plate, and the screw is matched with the second threaded hole and in threaded connection with the second threaded hole.

5. The water downconverter of claim 1, wherein: the center of the end cover is provided with a prismatic hole which is used for being matched with an assembling tool.

6. The water downconverter of claim 1, wherein: the conductive posts are connected with the end covers through threads.

7. The water downconverter of claim 1, wherein: the two ends of the conductive post are both connected with fixing bolts in a threaded mode, and the fixing bolts are used for fixing electric wires.

8. The water downconverter of claim 1, wherein: the both ends of leading electrical pillar all are equipped with binding post, binding post is the tubulose for it is right to make the electric wire pass the electric wire is fixed.

9. A method of assembling a downconverter, comprising:

placing the circuit assembly within the enclosure;

smearing sealing glue in the first threaded hole;

the screw penetrates through the first threaded hole and is screwed with the circuit assembly, and the sealant fills a gap between the first threaded hole and the screw;

pouring the sealant in the mounting groove to enable the sealant to cover the screw;

electrically connecting the circuit assembly to the conductive post via an electrical wire;

mounting and tightening the end cap to the opening;

the conductive column is electrically connected with the submersible pump through an electric wire;

pouring the sealant on the end cover to enable the sealant to cover the end cover;

and after the sealant is solidified, finishing assembly.

10. The method of assembling a water down converter as recited in claim 9, wherein: before the end cover is screwed, the end cover is firstly rotated towards the unscrewing direction and then screwed into the opening, and the mutual winding of electric wires is reduced.

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