CN218449879U - Buffering pressure relief device and inverter - Google Patents

Abstract

The utility model provides a buffering pressure relief device and dc-to-ac converter. The buffer pressure relief device comprises a blocking piece, a moving piece and a blocking structure, wherein the blocking piece is constructed to be connected with the inner wall of the box body of the inverter; the upper end of the moving part is constructed to be connected with the upper cover of the inverter, the moving part is provided with a long strip hole, and the blocking part is arranged in the long strip hole in a penetrating way; the movable piece is configured to move along the length direction of the elongated hole relative to the blocking piece; the stop structure is arranged on the moving piece and is configured to be in contact with the stop piece when the elongated hole is pulled off so as to prevent the moving piece from moving continuously. The technical scheme of the utility model buffer pressure relief device can solve current connecting device and only possess the single structure that blocks, and lead to the problem of becoming invalid easily.

Description

Buffering pressure relief device and inverter

Technical Field

The utility model relates to an inverter technical field particularly, relates to a buffering pressure relief device and dc-to-ac converter.

Background

Electronic components of the inverter may release flammable and explosive gas under special conditions, and if spark discharge occurs inside the inverter, explosion may be caused. The inverter comprises a box body and an upper cover which are connected with each other, and when explosion occurs in the box body to generate violent air pressure, strong impact force is easily generated on the upper cover, so that the upper cover is separated from the box body to fly out, and safety accidents are caused.

In order to prevent the upper cover from separating from the box body, a connecting device with explosion-proof and pressure relief functions is additionally arranged between the upper cover and the box body of the existing part of inverter, and when impact force is generated in the box body, the upper cover is pulled through the connecting device, so that the upper cover is prevented from flying out. The common connecting device is a chain, two ends of the chain are respectively connected with the upper cover and the box body, and after the upper cover is separated from the box body, the chain is tightened to pull the upper cover, so that the aim of preventing the upper cover from flying out is fulfilled. But this kind of connecting device only has a mode of blockking, realizes through the chain that tightens promptly, when explosion impact force is big, the easy emergence fracture of chain, and the upper cover can't be held again to the chain this moment, has just also lost the function of explosion-proof and pressure release.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a buffer pressure relief device and inverter, which can solve the problem that the existing connecting device only has a single blocking structure and is easy to fail.

In order to achieve the above object, according to an aspect of the present invention, there is provided a buffer pressure-relief device, including: a blocking member configured to be connectable with an inner wall of a case of the inverter; the upper end of the moving part is constructed to be connected with the upper cover of the inverter, the moving part is provided with a long strip hole, and the blocking part is arranged in the long strip hole in a penetrating way; the movable piece is configured to move along the length direction of the elongated hole relative to the blocking piece; and the stopping structure is arranged on the moving piece and is in contact with the stopping piece when the strip hole is pulled off so as to prevent the moving piece from moving continuously.

Furthermore, the stop structure is a stop plate flanged or protruding from the surface of the movable piece.

Further, buffering pressure relief device still includes the connecting piece, and the connecting piece setting is on the moving part, and the connecting piece has spacing surface to the longitudinal position that the location moving part is located the box.

Furthermore, a connecting hole is formed in the connecting piece, and the connecting piece is connected with the upper cover through a locking piece penetrating through the connecting hole.

Furthermore, the buffer pressure relief device further comprises a positioning piece, the positioning piece is constructed to be arranged on the box body, the positioning piece penetrates through the long hole and can be located at the end part of the long hole so as to position the movable piece at the position in the inverter box body.

Furthermore, the buffering pressure relief device also comprises a reinforcing rib arranged on one side of the movable piece.

Furthermore, the strengthening rib is provided with at least two, and at least two strengthening ribs are located moving part width direction's two borders department.

Further, the stopping structure is arranged at the first end of the movable piece, and the stopping structure keeps a preset distance from the end of the elongated hole to increase the pulling-out distance of the elongated hole.

Further, the connecting piece sets up the second tip at the moving part, and the second tip is relative with first end, and connecting piece and backstop structure set up respectively in the relative both sides of moving part.

According to the utility model discloses a further aspect provides an inverter, including box, upper cover and foretell buffering pressure relief device, buffering pressure relief device is at least one, or at least two along box inner wall circumference arrangement.

By applying the technical scheme of the utility model, a buffer pressure relief device is added between the upper cover of the inverter and the box body, air pressure with impact force is generated inside the box body, and when the upper cover is separated from the box body, the movable part moves upwards relative to the blocking piece and pulls the upper cover, so that the upper cover is prevented from flying out of the box body; after the movable part drives the upper cover to move upwards, a gap is formed between the upper cover and the box body and is used for timely discharging air pressure in the box body. When the pressure impact force in the box body is large enough to pull the strip hole away, the stop structure is matched with the blocking piece, the moving piece can be prevented from being separated from the box body, and the buffer pressure relief device is prevented from losing effect.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention. In the drawings:

fig. 1 shows a schematic structural view of a buffer pressure relief device according to an embodiment of the present invention;

fig. 2 shows an explosion structure view of the inverter in an unexploded state according to the embodiment of the present invention;

fig. 3 shows an explosion structure diagram of the inverter of the embodiment of the present invention in an explosion state; and

fig. 4 shows a schematic structural diagram of an inverter in an explosion state according to an embodiment of the present invention, wherein the buffer pressure relief device is only disposed on one side of the box.

Wherein the figures include the following reference numerals:

10. a buffer pressure relief device; 11. a blocking member; 12. a movable member; 121. a strip hole; 13. a stop structure; 14. a connecting member; 141. connecting holes; 15. a positioning member; 16. reinforcing ribs; 20. a box body; 21. a limiting edge; 30. an upper cover; 31. and (4) butting holes.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 to 3, the present invention provides a buffering pressure relief device 10. The buffer pressure relief device 10 comprises a blocking piece 11, a movable piece 12 and a blocking structure 13, wherein the blocking piece 11 is constructed to be connected with the inner wall of a box body 20 of the inverter; the upper end of the moving member 12 is configured to be connected with the upper cover 30 of the inverter, the moving member 12 is provided with a long hole 121, and the blocking member 11 is inserted into the long hole 121; the movable piece 12 is configured to be movable in the length direction of the elongated hole 121 relative to the blocking piece 11; a stop structure 13 is disposed on the moveable member 12, and the stop structure 13 is configured to contact the blocking member 11 when the elongated hole 121 is pulled out, so as to prevent the moveable member 12 from moving further.

In the present embodiment, the stopper 11 is a screw fixed to the inner wall of the housing 20, and the width of the elongated hole 121 is smaller than the diameter of the end of the screw, thereby preventing the elongated hole 121 from being separated from the end of the screw. The movable piece 12 is in a rectangular plate shape and is used for adhering to the inner wall of the box body 20; the movable member 12 is made of metal. The stopping structure 13 is located at the lower end of the movable element 12 and occupies the entire width of the end of the movable element 12, that is, the length of the stopping structure 13 is not less than the width of the movable element 12, and the midpoint of the stopping structure 13 is located on the extension line of the elongated hole 121, so as to ensure that the stopping structure 13 can contact with the blocking member 11 no matter which specific linear direction the elongated hole 121 is pulled away.

Referring to fig. 1, the stop structure 13 is a stop plate flanged or protruding from the surface of the movable member 12.

In the present embodiment, the stopping structure 13 is a flange disposed at an end of the movable element 12, and the flange is disposed in a direction that the movable element 12 does not abut against an inner wall of the box 20.

Referring to fig. 1, in one embodiment of the present invention, the cushioning pressure relief device 10 further includes a connecting member 14, the connecting member 14 is disposed on the movable member 12, and the connecting member 14 has a limiting surface to position the movable member 12 in a longitudinal position within the housing 20.

In this embodiment, the connecting member 14 is U-shaped, and has an open end facing downward, and an open end contacting and limiting the case 20, and the bottom surface is a limiting surface.

Referring to fig. 1 to 3, in an embodiment of the present invention, a connecting hole 141 is formed on the connecting member 14, and the connecting member 14 and the upper cover 30 are connected to each other by a locking member passing through the connecting hole 141.

In this embodiment, the coupling hole 141 is vertically opened on the coupling member 14 along the center of the coupling member 14, the coupling hole 141 is a screw hole, and the locking member is a bolt, so that the upper cover 30 is threadedly coupled to the coupling member 14.

In another embodiment, in order to ensure the connection strength between the buffer pressure relief device 10 and the upper cover 30, the connecting member 14 may be a solid connecting block, and the connecting hole 141 penetrates through the connecting block, so that a threaded section with a sufficient length of the connecting hole 141 can be connected with the locking member.

Referring to fig. 1 to 3, in an embodiment of the present invention, the buffering pressure-releasing device 10 further includes a positioning member 15, the positioning member 15 is configured to be disposed on the box 20, and the positioning member 15 passes through the elongated hole 121 and can be located at an end of the elongated hole 121 to position the movable member 12 in the inverter box 20.

In this embodiment, the positioning member 15 is also a screw fixed on the inner wall of the box 20, and the positioning member 15 and the blocking member 11 are located on the same vertical line, which coincides with the elongated hole 121. The positioning member 15 is used to keep the movable member 12 vertical, i.e. to keep the end surface of the connecting hole 141 on the connecting member 14 horizontal, so as to facilitate the connection of the connecting member 14 with the upper cover 30.

Referring to fig. 1 in combination, in one embodiment of the present invention, the cushioning pressure relief device 10 further includes a stiffener 16 disposed on one side of the movable member.

Referring to fig. 1 in combination, in one embodiment of the present invention, at least two reinforcing ribs 16 are provided, and at least two reinforcing ribs 16 are located at two edges of the width direction of the movable member 12.

In the present embodiment, the ribs 16 are located on two long sides of the moving member 12, the length of the ribs 16 is the same as the length of the moving member 12, and the ribs 16 are used for increasing the strength of the moving member 12 and also for limiting the moving member 12 from moving left to right when the moving member 12 moves up.

Referring to fig. 1, in an embodiment of the present invention, the stopping structure 13 is disposed at the first end of the movable member 12, and the stopping structure 13 keeps a predetermined distance from the end of the elongated hole 121 to increase the pulling-out distance of the elongated hole 121.

In the present embodiment, the first end of the movable member 12 is the lower end thereof; the strip hole 121 is pulled off, the moving part 12 at the lower end of the strip hole 121 needs to be cut by the blocking part 11, and the longer the cutting distance is, the more difficult the blocking structure 13 is to contact the blocking part 11, namely, the long-distance cutting is performed, so that the blocking part 11 can be subjected to resistance in the cutting process, the cutting cannot be continued, the function of the buffering pressure relief device 10 is ensured, and the safety is improved.

Referring to fig. 1 in combination, in an embodiment of the present invention, the connecting member 14 is disposed at a second end of the moving member 12, the second end is opposite to the first end, and the connecting member 14 and the stopping structure 13 are disposed at two opposite sides of the moving member 12, i.e. the stopping structure 13 and the reinforcing rib 16 are located at the same side of the moving member 12.

In this embodiment, the second end portion is an upper end portion of the movable member 12, and an upper end surface of the connecting member 14 is flush with an upper end surface of the movable member 12, or the upper end surface of the connecting member 14 is lower than the upper end surface of the movable member 12, so that the upper end surface of the connecting member 14 is ensured to be attached to the upper cover 30, and the upper end of the movable member 12 is prevented from blocking the upper cover 30 from being sealed with the box body 20.

Referring to fig. 2 and 3 in combination, the present invention further provides an inverter, which includes a box 20, an upper cover 30 and a buffering pressure-releasing device 10, wherein the buffering pressure-releasing device 10 is at least one, or more than two, arranged along the circumferential direction of the inner wall of the box 20.

In this embodiment, a threaded hole is opened in the inner wall of the box 20, and the blocking member 11 is fixed on the inner wall of the box 20 by screwing into the threaded hole, so that the blocking member 11 is fixed more firmly with the box 20. The inner wall of the box body 20 extends inwards in the circumferential direction to form a limiting edge 21, and the limiting surface of the connecting piece 14 is overlapped on the limiting edge 21 and used for limiting the longitudinal position of the buffering pressure relief device 10 in the box body 20, so that the buffering pressure relief device 10 is ensured not to interfere with the sealing between the upper cover 30 and the box body 20. The upper cover 30 is provided with a butt joint hole 31, the butt joint hole 31 is a threaded hole, and the upper cover 30 and the buffering pressure relief device 10 are fixedly connected in a mode that a locking piece penetrates through the connecting hole 141 and the butt joint hole 31. The maximum distance that the buffering pressure relief device 10 drives the upper cover 30 to rise is the distance between the blocking member 11 and the lower end of the elongated hole 121, that is, the height of the pressure relief gap formed between the upper cover 30 and the box body 20, and the height can be changed by changing the length of the elongated hole 121 or changing the position of the blocking member 11.

The number of the buffer pressure relief devices 10 is at least one, the specific setting number and the arrangement position are determined according to actual requirements, and the shape of the pressure relief gap can be changed through the arrangement position of the buffer pressure relief devices 10, for example, as shown in fig. 4, when the buffer pressure relief devices 10 are only arranged on one side of the box body 20, the pressure relief gap is triangular.

The assembly sequence of the inverter is as follows: firstly, fixing the movable piece 12 on the inner wall of the box 20 through the blocking piece 11 and the positioning piece 15; secondly, the upper cover 30 is assembled on the box body 20, and the sealing between the upper cover 30 and the box body 20 is ensured; finally, the upper cover 30 is connected with the buffer pressure relief device 10, specifically, by screwing the locking member into the abutting hole 31 of the upper cover 30 and the connecting hole 141 of the connecting member 14.

When box 20 is inside because of the explosion produces strong atmospheric pressure, the impact force that atmospheric pressure produced transmits buffering pressure relief device 10 through upper cover 30, makes buffering pressure relief device 10 take place the displacement in the length range between rectangular hole 121 lower extreme and blockking 11, and box 20 separates with upper cover 30, forms the pressure release space, and the confined space that both formed is broken, and atmospheric pressure is let out from the pressure release space, realizes the purpose of pressure release.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

(1) When strong air pressure is generated in the box body 20 due to explosion, the upper cover 30 is separated from the box body 20, and the buffering pressure relief device 10 pulls the upper cover 30, so that the upper cover 30 is prevented from flying out to cause potential safety hazards;

(2) The elongated hole 121 of the buffering pressure relief device 10 is in double fit with the stop structure 13, so that the pressure relief and explosion prevention functions are guaranteed against failure;

(3) The double limiting mode of the connecting piece 14 and the positioning piece 15 ensures the sealing of the upper cover 30 and the box body 20;

(4) According to specific requirements, the length of the elongated hole 121, the specific position of the blocking piece 11, the number and the specific position of the buffering pressure relief devices 10 are changed, so that the functions of pressure relief and explosion prevention are realized;

(5) The buffering and pressure relief device 10 has a simple structure, low manufacturing and processing costs and high popularization rate.

It is to be understood that the above-described embodiments are only some of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A buffer pressure relief device, comprising:

a blocking member (11), the blocking member (11) being configured to be connectable with an inner wall of a case (20) of the inverter;

the upper end of the movable piece (12) is constructed to be connected with an upper cover (30) of the inverter, a long hole (121) is formed in the movable piece (12), and the blocking piece (11) penetrates through the long hole (121); the movable piece (12) is configured to be movable relative to the blocking piece (11) along the length direction of the elongated hole (121);

a stop structure (13) arranged on the movable member (12), wherein the stop structure (13) is configured to be contacted with the blocking member (11) when the elongated hole (121) is pulled out, so as to prevent the movable member (12) from moving continuously.

2. The device according to claim 1, characterized in that said stop structure (13) is a flanging or a stop plate protruding from the surface of said movable element (12).

3. A cushioned pressure relief device as set forth in claim 1, wherein said cushioned pressure relief device (10) further comprises a connecting member (14), said connecting member (14) being disposed on said movable member (12), said connecting member (14) having a stop surface to position said movable member (12) in a longitudinal position within said tank (20).

4. The buffer pressure relief device according to claim 3, wherein a connecting hole (141) is formed in the connecting member (14), and the connecting member (14) and the upper cover (30) are connected with each other through a locking member penetrating through the connecting hole (141).

5. The apparatus according to claim 1, wherein said apparatus (10) further comprises a retainer (15), said retainer (15) being configured to be disposed on said tank (20), said retainer (15) passing through said elongated hole (121) and being positionable at an end of said elongated hole (121) to locate said movable member (12) in position within said tank (20).

6. A cushioned pressure relief device according to any one of claims 1 to 5, wherein said cushioned pressure relief device (10) further comprises a stiffener (16) disposed on one side of said movable member (12).

7. A buffer pressure relief device according to claim 6, characterized in that said ribs (16) are provided in at least two, at least two of said ribs (16) being located at both edges of said movable member (12) in the width direction.

8. A buffer pressure relief device according to claim 3, wherein said stop structure (13) is arranged at a first end of said movable member (12), said stop structure (13) being kept at a predetermined distance from an end of said elongated hole (121) to increase a pull-off distance of said elongated hole (121).

9. A buffer pressure relief device according to claim 8, wherein said connecting member (14) is arranged at a second end of said movable member (12), said second end being opposite to said first end, said connecting member (14) and said stop structure (13) being arranged on opposite sides of said movable member (12), respectively.

10. Inverter, characterized in that it comprises a tank (20), an upper cover (30) and a buffer pressure relief device (10) according to any of claims 1 to 8, said buffer pressure relief device (10) being at least one, or at least two, arranged circumferentially along the inner wall of said tank (20).

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