Explosion-proof variable-frequency governor

Abstract

The utility model belongs to the technical field of variable-frequency speed regulators, in particular to an explosion-proof variable-frequency speed regulator, which comprises a variable-frequency speed regulator box body and an energy absorption mechanism, a heat dissipation fan is mounted at the top end of the variable-frequency speed regulator box body, and the energy absorption mechanism is mounted at a position corresponding to a heat dissipation hole in the variable-frequency speed regulator box body. The energy absorption mechanism comprises a buffer plate which is elastically installed at the position, corresponding to the heat dissipation holes, of the inner side face of the variable-frequency speed regulator box body, and a gap is formed between the buffer plate and the inner side face of the variable-frequency speed regulator box body. The noise reduction sponge is fixed on the buffer plate; according to the variable-frequency governor box body, through the arranged energy absorption mechanism, kinetic energy of a part of airflow can be absorbed, shaking of the variable-frequency governor box body caused by too large airflow is avoided, noise can be effectively reduced, meanwhile, the safety of the variable-frequency governor box body is improved, and meanwhile, the noise reduction sponge can also absorb most noise sound waves and reduce noise.

Description

Technical Field

[0001] The utility model belongs to the technical field of variable frequency speed regulators, and in particular relates to an explosion-proof variable frequency speed regulator. Background Art

[0002] A variable frequency speed regulator is a device that converts industrial frequency power (50Hz or 60Hz) into AC power of various frequencies to achieve variable speed operation of the motor. The control circuit completes the control of the main circuit, the rectifier circuit converts AC power into DC power, the DC intermediate circuit smoothes and filters the output of the rectifier circuit, and the inverter circuit converts DC power into AC power.

[0003] In the prior art, a Chinese utility model patent with authorization announcement number CN220629212U discloses "an explosion-proof high-voltage variable frequency speed regulator", including a box body, in which a variable frequency speed regulator body is placed, a rotating door is rotatably provided at the right end of the box body, a display is embedded and installed on the rotating door, a knob is provided behind the display, a sliding cavity is provided on the rotating door, a tooth plate is slidably connected to the sliding cavity, a spring is fixedly connected between the tooth plate and the sliding cavity, an insert block is fixedly connected to the rear end of the tooth plate, a slot corresponding to the position of the insert block is provided on the rear wall of the box body, and a heat dissipation port is provided on the box body and a heat dissipation fan is installed to facilitate timely discharge of heat generated by the variable frequency speed regulator during operation from the box body.

[0004] Although the variable frequency speed regulators of the prior art, including those mentioned above, have the characteristic of easy heat dissipation, in actual use, the cooling air will inevitably hit the inner wall and filter of the box when flowing out, thereby generating a lot of noise, and when the amount of cooling air generated is greater than the outflow amount, the box will cause violent shaking or even bursting.

[0005] In order to solve the above problems, this application proposes an explosion-proof variable frequency speed regulator. Utility Model Content

[0006] In order to solve the above problems existing in the prior art, the utility model provides an explosion-proof variable frequency speed regulator, which has the characteristics of easy use, easy heat dissipation and high safety performance.

[0007] To achieve the above object, the utility model provides the following technical solutions: an explosion-proof variable frequency speed regulator, comprising a variable frequency speed regulator housing, a cooling fan is installed at the top of the variable frequency speed regulator housing, cooling holes are opened on the left and right sides of the variable frequency speed regulator housing, and an energy absorption mechanism is installed at a position corresponding to the cooling hole in the variable frequency speed regulator housing, and the energy absorption mechanism includes:

[0008] A buffer plate, wherein the buffer plate is elastically mounted on a position corresponding to the heat dissipation hole on the inner side surface of the variable frequency speed regulator housing, and a gap is provided between the buffer plate and the inner side surface of the variable frequency speed regulator housing;

[0009] A noise reduction sponge is fixed on the buffer plate.

[0010] As a preferred technical solution of the utility model, the energy absorption mechanism further includes:

[0011] A threaded rod, the threaded rod is fixed to the buffer plate and passes through the variable frequency speed regulator housing;

[0012] A telescopic spring, wherein the telescopic spring is sleeved on the threaded rod and is located between the inner side of the variable frequency speed regulator housing and the buffer plate;

[0013] A locking nut is installed on the protruding end of the threaded rod by threaded engagement.

[0014] As a preferred technical solution of the utility model, four diagonally distributed threaded rods are fixed on the buffer plate.

[0015] As a preferred technical solution of the utility model, a honeycomb-shaped noise reduction groove is provided on the noise reduction sponge.

[0016] As a preferred technical solution of the utility model, the cross-section of the noise reduction groove is conical, and the diameter near the port position is larger.

[0017] As a preferred technical solution of the utility model, the buffer plate and the noise reduction sponge are both spherical structures, and the notches of the buffer plate and the noise reduction sponge face the heat dissipation holes.

[0018] As a preferred technical solution of the utility model, an inspection port is provided on the back of the variable frequency speed regulator housing.

[0019] As a preferred technical solution of the utility model, it also includes:

[0020] An inspection door is hinged in the inspection opening by means of hinges.

[0021] As a preferred technical solution of the utility model, it also includes:

[0022] A connecting plate fixed to the free end of the inspection door;

[0023] A manual bolt is provided with a threaded hole on the variable frequency speed regulator housing. The manual bolt penetrates the connecting plate and is screwed into the threaded hole by means of threaded engagement.

[0024] As a preferred technical solution of the utility model, it also includes:

[0025] A handle is fixed to the outer wall of the free end of the inspection door.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] In the utility model, the energy-absorbing mechanism is set up to absorb part of the kinetic energy of the airflow, thereby preventing the variable frequency speed regulator housing from shaking due to excessive airflow, effectively reducing the generation of noise, and improving the safety of the variable frequency speed regulator housing. At the same time, the noise reduction sponge can also absorb most of the noise sound waves to reduce noise.

[0028] Other additional advantages and beneficial effects of the present application will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 It is a schematic diagram of the structure of the utility model;

[0031] Figure 2 It is a schematic diagram of the axonometric structure of the energy absorbing mechanism in the utility model;

[0032] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure of the energy absorbing mechanism;

[0033] Figure 4 This is a schematic diagram of the axonometric structure of the utility model;

[0034] Figure 5 For this utility model Figure 4 A in the figure is an enlarged structural diagram.

[0035] In the figure: 1. frequency converter housing; 101. heat dissipation holes; 102. inspection port; 103. threaded holes; 2. cooling fan; 3. energy absorption mechanism; 31. buffer plate; 311. threaded rod; 32. telescopic spring; 33. locking nut; 34. noise reduction sponge; 341. noise reduction groove; 4. inspection door; 41. connecting plate; 42. handle; 5. hinge; 6. manual bolt. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] See also Figure 1-Figure 5 The utility model provides the following technical solutions: an explosion-proof variable frequency speed regulator, including a variable frequency speed regulator case 1, a cooling fan 2 is installed on the top of the variable frequency speed regulator case 1, cooling holes 101 are opened on the left and right sides of the variable frequency speed regulator case 1, and also includes an energy absorption mechanism 3, the energy absorption mechanism 3 is installed in the variable frequency speed regulator case 1 at a position corresponding to the cooling holes 101, and the energy absorption mechanism 3 includes: a buffer plate 31 and a noise reduction sponge 34.

[0038] Specifically, by Figure 1-Figure 3 As shown, in the present embodiment, the buffer plate 31 is elastically mounted on the inner side surface of the variable frequency speed regulator case 1 at a position corresponding to the heat dissipation hole 101, and there is a gap between the buffer plate 31 and the inner side surface of the variable frequency speed regulator case 1, and the noise reduction sponge 34 is fixed on the buffer plate 31. Therefore, when in use, cooling air is blown out by the cooling fan 2, and air circulation is realized through the heat dissipation holes 101 to dissipate heat to the internal components of the variable frequency speed regulator case 1. The energy absorption mechanism 3 is set to absorb part of the kinetic energy of the airflow to avoid shaking of the variable frequency speed regulator case 1 caused by excessive airflow, which can effectively reduce the generation of noise and improve the safety of the variable frequency speed regulator case 1. At the same time, the noise reduction sponge 34 can also absorb most of the noise sound waves to reduce noise.

[0039] Optionally, by Figure 1-Figure 3 As shown, in the present embodiment, the energy absorption mechanism 3 also includes: a threaded rod 311, a telescopic spring 32 and a locking nut 33. The threaded rod 311 is fixed on the buffer plate 31 and passes through the variable frequency speed regulator case 1. The telescopic spring 32 is sleeved on the threaded rod 311, and the telescopic spring 32 is located between the inner side surface of the variable frequency speed regulator case 1 and the buffer plate 31. The locking nut 33 is installed on the protruding end of the threaded rod 311 by threaded engagement. The threaded rod 311 and the locking nut 33 realize the stable installation of the buffer plate 31. The telescopic spring 32 makes the buffer plate 31 elastic. When the airflow hits the noise reduction sponge 34, the telescopic spring 32 absorbs part of the kinetic energy of the airflow by contraction. The kinetic energy of the airflow is converted into the elastic potential energy of the telescopic spring 32, so as to avoid the variable frequency speed regulator case 1 from shaking due to excessive airflow, which can effectively reduce the generation of noise and improve the safety of the variable frequency speed regulator case 1.

[0040] It should be noted that the utility model adopts threaded rod 311, telescopic spring 32 and locking nut 33 to realize the installation and energy absorption of buffer plate 31, but it is not used to limit the utility model. Other methods with the same functions can also be used to install the buffer plate 31. However, after adopting this scheme, there is a gap between the buffer plate 31 and the inner side surface of the variable frequency speed regulator case 1, which is conducive to the normal conduction of airflow and heat dissipation. At the same time, the initial elastic force of the telescopic spring 32 can be adjusted by adjusting the initial position of the locking nut 33 to meet different usage needs.

[0041] Preferably, by Figure 1-Figure 3 As shown, in this embodiment, four diagonally distributed threaded rods 311 are fixed on the buffer plate 31, and the four threaded rods 311 can ensure the stability of the installation of the buffer plate 31. It should be noted that the number of installed buffer plates 31 is not limited to four, but theoretically should be at least two to ensure the stability of the installation of the buffer plate 31.

[0042] Preferably, by Figure 1-Figure 3 As shown, in this embodiment, a honeycomb-shaped noise reduction groove 341 is opened on the noise reduction sponge 34. When the noise sound waves are transmitted into the noise reduction groove 341, the noise sound waves will be reflected in all directions, and the noise sound waves on the same path will weaken or offset each other, and the intensity of the noise will be greatly reduced.

[0043] Preferably, by Figure 1-Figure 3 As shown, in this embodiment, the cross-section of the noise reduction groove 341 is conical, and the diameter near the port position is larger. After adopting this design, it can be fully ensured that when the noise sound waves are transmitted into the noise reduction groove 341, the noise sound waves will be reflected in all directions, and the noise reduction sponge 34 absorbs part of the noise. As for the reflected noise sound waves, the noise sound waves on the same path weaken or offset each other, and the noise intensity is greatly reduced.

[0044] Preferably, by Figure 1-Figure 3 As shown, in this embodiment, the buffer plate 31 and the noise reduction sponge 34 are both spherical structures, and the recesses of the buffer plate 31 and the noise reduction sponge 34 face the heat dissipation holes 101. This design is similar to the spherical design of a golf ball. When the airflow is conducted to the noise reduction sponge 34, the airflow will be disturbed, which can not only achieve a better energy absorption effect, but also effectively reduce the generation of noise.

[0045] Preferably, by Figure 1 and Figure 4 As shown, in this embodiment, an inspection port 102 is provided on the back of the variable frequency speed regulator housing 1 , and the internal components of the variable frequency speed regulator housing 1 can be easily inspected through the inspection port 102 .

[0046] Preferably, by Figure 1 and Figure 4As shown, in this embodiment, it also includes: an inspection door 4, which is hinged in the inspection port 102 by a hinge 5. The inspection door 4 is opened to facilitate the inspection of the internal components of the variable frequency speed regulator housing 1. The inspection door 4 is closed during operation to provide safety protection for the internal components of the variable frequency speed regulator housing 1 and to prevent outsiders from accidentally touching the internal components of the variable frequency speed regulator housing 1 and causing safety accidents.

[0047] Preferably, by Figure 1 , Figure 4 and Figure 5 As shown, in this embodiment, it also includes: a connecting plate 41 and a manual bolt 6. The connecting plate 41 is fixed to the free end of the inspection door 4. A threaded hole 103 is opened on the frequency converter housing 1. The manual bolt 6 penetrates the connecting plate 41 and is screwed into the threaded hole 103 by threaded engagement. After the inspection door 4 is closed, the manual bolt 6 is tightened to improve the stability of the inspection door 4 after closing, to protect the internal components of the frequency converter housing 1, and to prevent outsiders from accidentally touching the internal components of the frequency converter housing 1 to cause safety accidents.

[0048] Preferably, by Figure 1 , Figure 4 and Figure 5 As shown, in this embodiment, it also includes: a handle 42, which is fixed to the outer wall of the free end of the inspection door 4. The inspection door 4 is convenient to open by the provided handle 42.

[0049] It should be noted that the improvement scheme of the present invention is applicable to most variable frequency speed regulators. The drawings of the present invention only show one type of variable frequency speed regulator, such as the IGX series variable frequency speed regulator. The internal structure of the variable frequency speed regulator is a well-disclosed prior art and is widely used prior art, so it will not be elaborated here.

[0050] The circuit connection involved in the utility model is a common means used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments, and it belongs to the widely used existing technology.

[0051] Components not described in detail herein are prior art.

[0052] Working principle and use process of the utility model: When the variable frequency speed regulator housing 1 of the utility model is in use, cooling air is blown out by the cooling fan 2, and air circulation is realized through the heat dissipation holes 101 to dissipate heat to the internal components of the variable frequency speed regulator housing 1;

[0053] By setting the energy absorption mechanism 3, when the airflow hits the noise reduction sponge 34, the telescopic spring 32 absorbs part of the kinetic energy of the airflow by contraction, and the kinetic energy of the airflow is converted into the elastic potential energy of the telescopic spring 32, so as to avoid the shaking of the variable frequency speed regulator case 1 caused by excessive airflow, which can effectively reduce the generation of noise and improve the safety of the variable frequency speed regulator case 1. At the same time, the noise reduction sponge 34 can also absorb most of the noise sound waves to reduce noise;

[0054] In the present invention, the buffer plate 31 and the noise reduction sponge 34 are both spherical structures, and the notches of the buffer plate 31 and the noise reduction sponge 34 face the heat dissipation hole 101. When the airflow is conducted to the noise reduction sponge 34, the airflow will be disturbed, which can not only achieve a better energy absorption effect, but also effectively reduce the generation of noise;

[0055] A honeycomb-shaped noise reduction groove 341 is provided on the noise reduction sponge 34. When the noise sound waves are transmitted into the noise reduction groove 341, the noise sound waves will be reflected in all directions, and the noise sound waves on the same path will weaken or offset each other, and the intensity of the noise will be greatly reduced.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An explosion-proof variable frequency speed regulator, comprising a variable frequency speed regulator housing (1), a cooling fan (2) is installed at the top of the variable frequency speed regulator housing (1), and cooling holes (101) are opened on both the left and right sides of the variable frequency speed regulator housing (1), characterized in that: It also includes an energy absorption mechanism (3), which is installed at a position corresponding to the heat dissipation hole (101) in the variable frequency speed regulator housing (1), and includes: A buffer plate (31), the buffer plate (31) being elastically mounted on a position of the inner side surface of the variable frequency speed regulator housing (1) corresponding to the heat dissipation hole (101), and a gap is provided between the buffer plate (31) and the inner side surface of the variable frequency speed regulator housing (1); A noise reduction sponge (34), wherein the noise reduction sponge (34) is fixed on the buffer plate (31).

2. The explosion-proof variable frequency speed regulator according to claim 1, characterized in that: The energy absorbing mechanism (3) further comprises: A threaded rod (311), wherein the threaded rod (311) is fixed on the buffer plate (31) and passes through the variable frequency speed regulator housing (1); A telescopic spring (32), wherein the telescopic spring (32) is sleeved on the threaded rod (311), and the telescopic spring (32) is located between the inner side surface of the variable frequency speed regulator housing (1) and the buffer plate (31); A locking nut (33) is installed on the protruding end of the threaded rod (311) by means of threaded engagement.

3. The explosion-proof variable frequency speed regulator according to claim 1, characterized in that: Four diagonally distributed threaded rods (311) are fixed on the buffer plate (31).

4. The explosion-proof variable frequency speed regulator according to claim 1, characterized in that: The noise reduction sponge (34) is provided with a honeycomb-shaped noise reduction groove (341).

5. The explosion-proof variable frequency speed regulator according to claim 4 is characterized in that: The cross section of the noise reduction groove (341) is conical, and the diameter is larger near the port.

6. The explosion-proof variable frequency speed regulator according to claim 1, characterized in that: The buffer plate (31) and the noise reduction sponge (34) are both spherical structures, and the notches of the buffer plate (31) and the noise reduction sponge (34) face the heat dissipation hole (101).

7. The explosion-proof variable frequency speed regulator according to claim 1, characterized in that: An inspection opening (102) is provided on the back of the variable frequency speed regulator housing (1).

8. The explosion-proof variable frequency speed regulator according to claim 7, characterized in that: Also includes: An inspection door (4), the inspection door (4) is hinged in the inspection opening (102) by means of a hinge (5).

9. The explosion-proof variable frequency speed regulator according to claim 8, characterized in that: Also includes: A connecting plate (41), wherein the connecting plate (41) is fixed to the free end of the inspection door (4); A manual bolt (6) is provided with a threaded hole (103) on the variable frequency speed regulator housing (1); the manual bolt (6) penetrates the connecting plate (41) and is screwed into the threaded hole (103) by means of a threaded screwing method.

10. The explosion-proof variable frequency speed regulator according to claim 8, characterized in that: Also includes: A handle (42) is fixed to the outer wall of the free end of the inspection door (4).

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