High-voltage frequency converter with silencer at air outlet

Abstract

The high-voltage frequency converter air outlet silencer comprises a frequency converter body and an air conditioner, an air duct pipe is fixedly installed at the top of the frequency converter body, a silencer body is fixedly installed at the left end of the air duct pipe, and an elastic silencing mechanism is installed in an inner cavity of the silencer body in a penetrating mode. The elastic silencing mechanism comprises a positioning seat, a vertical rod and an air inducing inclined plate, a cross rod is slidably mounted on the surface of the positioning seat in a penetrating manner, a mounting frame is fixedly connected to the right end of the cross rod, and a filter screen plate is fixedly embedded in the mounting frame. The silencer body and the elastic silencing mechanism are arranged, so that the silencer has the advantage of good silencing, the filter screen plate can be configured for dustproof protection on the basis that the silencer body is used for silencing wind power, and when the transmitted air volume is large, the sponge column naturally extends out to assist in blocking airflow, and meanwhile, auxiliary sound absorption treatment can be carried out, so that the service life of the silencer is prolonged, and the service life of the silencer is prolonged. And the actual use requirements are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of power equipment accessories, and particularly relates to a high-voltage frequency converter with a muffler at the air outlet. Background Technique

[0002] A high-voltage frequency converter is a power equipment that converts high-voltage alternating current into adjustable low-voltage and low-frequency alternating current, and is widely used in multiple industries such as power, petroleum, chemical industry, metallurgy, mining, and rail transit for the speed regulation and energy-saving control of motors.

[0003] The existing air outlets of high-voltage frequency converters are mainly direct air outlet internal circulation and connected air duct external circulation. Their disadvantages are as follows: for direct air outlet internal circulation, the fan noise is large, and inspection personnel cannot work in this environment for a long time; when the space is limited, the frequency converter is prone to overheating during summer operation, and too high temperature affects the service life of the equipment. For connected air duct external circulation, negative pressure is easily formed indoors, the air volume passing through is insufficient, and dust, water vapor, etc. enter the room, resulting in poor operating environment hygiene, short service life of the high-voltage frequency converter filter screen, easy occurrence of faults such as short circuit of the power unit module inside the frequency converter, unstable operation, and high maintenance cost. To solve the above technical problems, we have designed a high-voltage frequency converter with a muffler at the air outlet. Content of the Utility Model

[0004] The purpose of the utility model is to propose a high-voltage frequency converter with a muffler at the air outlet in view of the deficiencies of the existing technology, so as to solve the problems of excessive noise at the air outlet end of the basic high-voltage frequency converter in the existing technology, easy overheating in internal circulation, and easy accumulation of impurities in external circulation.

[0005] The technical purpose of the utility model is achieved through the following technical solutions:

[0006] A high-voltage frequency converter with a muffler at the air outlet includes a frequency converter body and an air conditioner. A duct pipe is fixedly installed at the top of the frequency converter body. A muffler body is fixedly installed at the left end of the duct pipe. An elastic sound-absorbing mechanism is installed through the inner cavity of the muffler body. The elastic sound-absorbing mechanism includes a positioning seat, a vertical rod, and a wind-guiding inclined plate. A cross bar is slidably installed through the surface of the positioning seat. The right end of the cross bar is fixedly connected to an installation frame. A filter screen plate is fixedly inlaid inside the installation frame. The bottom of the vertical rod and inside the inner cavity of the muffler body is fixedly connected to an integrated plate. A sponge column is fixedly connected to the bottom of the integrated plate. An air outlet head is fixedly installed at the left end of the muffler body. Installation holes are respectively opened through the left and right sides of the muffler body.

[0007] Preferably, the number of the positioning seats is two. The positioning seats and the wind-guiding inclined plates are both located at the top of the inner cavity of the muffler body and are both fixedly connected to the inner wall of the muffler body.

[0008] Preferably, the vertical rod is slidably installed through the top of the surface of the muffler body, the horizontal rod penetrates through the air guiding inclined plate and is in sliding contact with the air guiding inclined plate, and a wedge block is fixedly connected to the left end of the horizontal rod.

[0009] Preferably, a first spring is sleeved and installed on the surface of the horizontal rod. One end of the first spring is fixedly connected to the surface of the installation frame, and the other end of the first spring is fixedly connected to the surface of the positioning seat.

[0010] Preferably, a second spring is sleeved and installed on the surface of the vertical rod and located at the top of the muffler body. One end of the second spring is fixedly connected to the surface of the vertical rod, and the other end of the second spring is fixedly connected to the top of the muffler body.

[0011] Preferably, the number of the sponge columns is several, and they are evenly distributed at the bottom of the integrated board. Through holes adapted to the sponge columns are formed through the surface of the air guiding inclined plate.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] By providing the muffler body and the elastic sound absorption mechanism, the utility model has the advantage of good sound absorption. On the basis of the muffler body for wind sound absorption, a filter screen plate is configured for dust protection. When the transmitted air volume is large, the sponge columns naturally protrude to assist in blocking the air flow and can perform auxiliary sound absorption treatment, which better meets the actual use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the utility model;

[0015] Figure 2 is a schematic side view of the structure of the utility model;

[0016] Figure 3 is a three-dimensional schematic diagram of the muffler body of the utility model;

[0017] Figure 4 is a three-dimensional sectional view of the muffler body of the utility model;

[0018] Figure 5 is a three-dimensional schematic diagram of the elastic sound absorption mechanism of the utility model.

[0019] In the above-mentioned drawings: 1, frequency converter body; 2, air duct; 3, muffler body; 4, air outlet head; 5, air conditioner; 6, mounting hole; 7, elastic sound absorption mechanism; 701, mounting frame; 702, horizontal rod; 703, positioning seat; 704, vertical rod; 705, second spring; 706, sponge column; 707, integrated board; 708, wedge block; 709, through hole; 710, air guiding inclined plate; 711, first spring; 712, filter screen plate. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] As a preferred embodiment of the present utility model, as Figures 1 - 5 shown, this embodiment provides a high-voltage inverter with a muffler at the air outlet, including an inverter body 1 and an air conditioner 5. A duct pipe 2 is fixedly installed at the top of the inverter body 1, and a muffler body 3 is fixedly installed at the left end of the duct pipe 2. An elastic sound-absorbing mechanism 7 is installed through the inner cavity of the muffler body 3. The elastic sound-absorbing mechanism 7 includes a positioning seat 703, a vertical rod 704, and an air guiding inclined plate 710. A cross bar 702 is slidably installed through the surface of the positioning seat 703. By setting the cross bar 702, it can play a role in filtering dust, avoiding dust and impurities in the external gas from entering the duct pipe 2 when the device is in an idle state. The right end of the cross bar 702 is fixedly connected to an installation frame 701. By setting the installation frame 701, it can meet the fixed installation requirements of the filter screen plate 712 and can be in sliding contact with the inner wall of the muffler body 3. A filter screen plate 712 is fixedly embedded inside the installation frame 701. The bottom of the vertical rod 704 and inside the inner cavity of the muffler body 3 is fixedly connected to an integrated plate 707. By setting the integrated plate 707, it can meet the fixed installation requirements of multiple sponge columns 706. The bottom of the integrated plate 707 is fixedly connected to a sponge column 706. An air outlet head 4 is fixedly installed at the left end of the muffler body 3. Installation holes 6 are respectively opened through the left and right sides of the muffler body 3. By setting the installation holes 6, the muffler body 3 can be well installed with the duct pipe 2 and the muffler body 3 can be well installed with the air outlet head 4 under the cooperation of peripheral bolts.

[0022] In some embodiments, as Figure 4 and Figure 5 shown, the number of the positioning seats 703 is two. The positioning seats 703 and the air guiding inclined plate 710 are both located at the top of the inner cavity of the muffler body 3 and are both fixedly connected to the inner wall of the muffler body 3. By setting the positioning seats 703, it can be fixedly connected to the muffler body 3 and can position and guide the displacement of the cross bar 702. By setting the air guiding inclined plate 710, it can cover and block the integrated plate 707 and the sponge column 706, and avoid the sponge column 706 from being exposed to further reduce and discharge the air velocity in the state of small air volume.

[0023] In some embodiments, as Figure 4 and Figure 5As shown, the vertical rod 704 is slidably installed through the top of the muffler body 3. By setting the vertical rod 704, it can be in sliding and sealing contact with the muffler body 3 and guide the up and down displacement of the integrated plate 707 to ensure the stability of the movement of the integrated plate 707. The horizontal rod 702 penetrates through the air guiding inclined plate 710 and is in sliding contact with the air guiding inclined plate 710. A wedge block 708 is fixedly connected to the left end of the horizontal rod 702. By setting the wedge block 708, when it moves leftward, its left end inclined surface can first contact the integrated plate 707, so that the integrated plate 707 is automatically displaced downward under the extrusion of the wedge block 708.

[0024] In some embodiments, as Figure 4 and Figure 5 shown, a first spring 711 is sleeved and installed on the surface of the horizontal rod 702. One end of the first spring 711 is fixedly connected to the surface of the mounting frame 701, and the other end of the first spring 711 is fixedly connected to the surface of the positioning seat 703.

[0025] In some embodiments, as Figure 4 and Figure 5 shown, a second spring 705 is sleeved and installed on the surface of the vertical rod 704 and at the top of the muffler body 3. One end of the second spring 705 is fixedly connected to the surface of the vertical rod 704, and the other end of the second spring 705 is fixedly connected to the top of the muffler body 3. By setting the second spring 705 and the first spring 711, the vertical rod 704 and the horizontal rod 702 can be elastically supported respectively, and the integrated plate 707 or the mounting frame 701 can be prevented from randomly displacing without external force.

[0026] In some embodiments, as Figure 4 and Figure 5 shown, the number of sponge columns 706 is several and they are evenly distributed at the bottom of the integrated plate 707. Through holes 709 that cooperate with the sponge columns 706 are formed through the surface of the air guiding inclined plate 710. By setting the through holes 709, the downward movement space requirements of the sponge columns 706 can be met.

[0027] In some embodiments, the wedge block 708 and the vertical rod 704 are arranged in a staggered manner to prevent the wedge block 708 from colliding with and obstructing the vertical rod 704 when moving left and right.

[0028] In some embodiments, the side of the wedge block 708 close to the integrated plate 707 is inclined.

[0029] In some embodiments, the sponge column 706 includes an auxiliary rod and a wave peak attracting sponge sleeve. The number of auxiliary rods is several and they are all fixedly connected to the integrated plate 707, and the wave peak attracting sponge sleeve is fixedly sleeved on the auxiliary rod.

[0030] In some embodiments, the muffler body 3 can be fixedly installed with the air duct 2 and the muffler body 3 with the air outlet head 4 by bolts cooperating with the mounting holes 6. Moreover, in order to further improve the overall noise reduction performance of the equipment, shock pads are provided at the connection between the muffler body 3 and the air duct 2 and at the connection between the muffler body 3 and the air outlet head 4.

[0031] During use, all components are in the initial installation state. When the inverter body 1 operates, the outgoing air is collected through the air duct 2 and then muffled by the muffler body 3, greatly reducing the operating noise. When the operating temperature of the inverter body 1 is relatively low, its exhaust heat dissipation is small, the vibration and noise are small, and the hot air flowing through the muffler body 3 directly passes through the filter mesh plate 712 and is discharged from the air outlet head 4, and the muffler body 3 can achieve a good noise reduction and protection effect; when the operating temperature of the inverter body 1 is relatively high, its exhaust heat dissipation is large, the vibration and noise are large. First, the indoor temperature is regulated by the air conditioner 5. Since the air volume and wind speed entering the muffler body 3 increase, the filter mesh plate 712 and the mounting frame 701 will move leftward, and the first spring 711 is compressed to generate a reaction force to slow down the wind speed. The wedge block 708 moves leftward along with the cross bar 702 and contacts the integrated plate 707. The integrated plate 707 moves downward under the extrusion of the inclined surface of the wedge block 708, and the second spring 705 is compressed to generate a reaction force to slow down the wind speed. Moreover, as the integrated plate 707 moves further downward, the sponge column 706 will pass through the through hole 709 and protrude out of the air guiding inclined plate 710 and be in an exposed state. The sponge sleeve is attracted by the wave crest on the sponge column 706 for auxiliary sound absorption treatment, which better meets the actual use requirements; in practical applications, since the addition of the muffler body 3 forms an internal circulation, not only the noise during the operation of the inverter body 1 is greatly reduced, but also the problems of indoor negative pressure, insufficient air volume, dust or water vapor entering the room, poor environmental hygiene, short service life of the filter mesh, and frequent failures of the inverter body 1 caused by the external circulation are avoided.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A high-voltage frequency converter having a silencer at an air outlet, comprising a frequency converter body (1) and an air conditioner (5), characterized in that: An air duct pipe (2) is fixedly mounted on the top of the inverter body (1), a muffler body (3) is fixedly mounted on the left end of the air duct pipe (2), an elastic muffler mechanism (7) is installed through the inner cavity of the muffler body (3), the elastic muffler mechanism (7) comprises a positioning seat (703), a vertical rod (704) and an air induction inclined plate (710), a horizontal rod (702) is slidably installed through the surface of the positioning seat (703), a mounting frame (701) is fixedly connected to the right end of the horizontal rod (702), a filter screen plate (712) is fixedly embedded in the interior of the mounting frame (701), an integrated board (707) is fixedly connected to the bottom of the vertical rod (704) and located in the inner cavity of the muffler body (3), a sponge column (706) is fixedly connected to the bottom of the integrated board (707), an air outlet (4) is fixedly mounted on the left end of the muffler body (3), and mounting holes (6) are opened through the left and right sides of the muffler body (3).

2. The high-voltage frequency converter with a muffler at the air outlet according to claim 1, characterized in that: The number of the positioning seats (703) is two; the positioning seats (703) and the air induction inclined plate (710) are both located at the top of the inner cavity of the muffler body (3), and are both fixedly connected to the inner wall of the muffler body (3).

3. The high-voltage frequency converter with a muffler at the air outlet according to claim 1, characterized in that: The vertical rod (704) penetrates and is slidably mounted on the top of the surface of the muffler body (3); the horizontal rod (702) penetrates and is in slidable contact with the wind induction inclined plate (710); and the left end of the horizontal rod (702) is fixedly connected to a wedge block (708).

4. The high-voltage frequency converter with a muffler at the air outlet according to claim 1, characterized in that: A first spring (711) is sleeved and installed on the surface of the crossbar (702), one end of the first spring (711) is fixedly connected to the surface of the installation frame (701), and the other end of the first spring (711) is fixedly connected to the surface of the positioning seat (703).

5. The high-voltage frequency converter with a muffler at the air outlet according to claim 1, characterized in that: A second spring (705) is sleeved and installed on the surface of the vertical rod (704) and located at the top of the muffler body (3); one end of the second spring (705) is fixedly connected to the surface of the vertical rod (704), and the other end of the second spring (705) is fixedly connected to the top of the muffler body (3).

6. The high-voltage frequency converter with a muffler at the air outlet according to claim 1, characterized in that: The number of the sponge columns (706) is several and they are evenly distributed at the bottom of the integrated board (707); and through holes (709) for use with the sponge columns (706) are provided through the surface of the air induction inclined plate (710).

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