Noise reduction device of amplitude modulation medium wave broadcast transmitter

Abstract

The utility model provides a noise reduction device of an amplitude modulation medium wave broadcast transmitter, which comprises an arch-shaped frame fixedly arranged on a casing of the broadcast transmitter, the inside of the arch-shaped frame is connected with a clamping assembly in a sliding manner, the center of the arch-shaped frame is in threaded connection with an interval adjusting assembly, the interval adjusting assembly is rotatably connected to the surface of the clamping assembly, and the clamping assembly is connected with the clamping assembly in a threaded manner. The spacing adjusting assembly is used for adjusting the spacing between the clamping assembly and the broadcast transmitter shell, a sound insulation plate is arranged between the clamping assembly and the broadcast transmitter shell, a cavity is formed between the sound insulation plate and the broadcast transmitter shell, and a suction assembly is arranged at the top of the arch-shaped frame. The suction assembly elastically abuts against the top of the sound insulation plate and is used for sucking air in the cavity. The utility model has the advantages of convenient installation and dismantlement and good sound insulation and noise reduction effect.

Description

Technical Field

[0001] The utility model relates to the field of broadcast transmitters, in particular to a noise reduction device for an amplitude modulation medium wave broadcast transmitter. Background Art

[0002] The main task of the transmitter is to complete the modulation of the high-frequency carrier with the useful low-frequency signal, and convert it into an electromagnetic wave with a certain bandwidth at a certain center frequency, which is suitable for transmission through the antenna. It can be mainly divided into FM transmitter, AM transmitter, optical transmitter and other types. During the operation of the broadcast transmitter, noise will be generated due to the mechanical action of the AC contactor and the overflow of the audio AC signal, which will affect the monitoring of the staff.

[0003] The Chinese patent with application date: 2022-11-24 and publication number: CN219042197U discloses a noise reduction device for an AM medium wave broadcast transmitter. The noise reduction device for the AM medium wave broadcast transmitter includes a sound insulation board, one side of which is provided with two parallel slots, and also includes: a mounting frame, the sound insulation board is plugged into the mounting frame; two sets of fixings, both fixed to one side of the mounting frame, the two sets of fixings are respectively engaged in the two slots on the side of the sound insulation board, and the forces exerted by the two sets of fixings on the sound insulation board in the vertical direction are in the same plane and opposite in direction; tighten the bolts, penetrate the mounting frame and abut against the side wall of the sound insulation board. The mounting frame is directly fixed to the transmitter, and the sound insulation board is installed inside the mounting frame, and is fixed by fixings, and the fixings themselves are very simple and convenient to use, so the disassembly and assembly of the sound insulation board is faster, and at the same time, it is reinforced by a tightening bolt, so the stability of the sound insulation board can also be ensured.

[0004] In this technical solution, the sound insulation board is fixed by snapping four fixing parts into the slots of the sound insulation board and then tightening the bolts to abut against the sound insulation board, so as to achieve the purpose of quick disassembly and assembly of the sound insulation board; however, when disassembling the sound insulation board, it is difficult for one person to press the four pressing plates at the same time to separate the four fixing parts from the slots of the sound insulation board, so at least two people are required to cooperate to press the four pressing plates, which makes the disassembly process of the sound insulation board more troublesome and can be further improved. Summary of the invention

[0005] In order to solve the problems existing in the background technology, the utility model proposes a noise reduction device for an AM medium wave broadcast transmitter.

[0006] A noise reduction device for an AM medium wave broadcast transmitter comprises an arch frame fixedly mounted on a housing of the broadcast transmitter, a clamping assembly being slidably connected inside the arch frame, a spacing adjustment assembly being threadedly connected at the center of the arch frame, the spacing adjustment assembly being rotatably connected to the surface of the clamping assembly, the spacing adjustment assembly being used to adjust the spacing between the clamping assembly and the housing of the broadcast transmitter, a sound insulation board being arranged between the clamping assembly and the housing of the broadcast transmitter, a cavity being formed between the sound insulation board and the housing of the broadcast transmitter, a suction assembly being arranged on the top of the arch frame, the suction assembly being elastically abutted against the top of the sound insulation board, and the suction assembly being used to suck the air inside the cavity.

[0007] Based on the above, the clamping assembly includes four groups of sliding columns one that are slidably connected to the arch frame, the four groups of sliding columns one are respectively located at the corners of the arch frame, and the ends of the four groups of sliding columns one are fixedly installed with connecting covers, the connecting covers are sleeved on the outside of the sound insulation board, and the surface of the connecting cover is penetrated by two groups of slots distributed on the left and right.

[0008] Based on the above, two groups of push plates distributed on the left and right are fixedly installed on the inner side of the arch frame, and the push plates correspond to the slots one by one, and the push plates are used to be plugged into the slots.

[0009] Based on the above, the spacing adjustment assembly includes a fixed cover fixedly installed at the center of the connecting cover, a rotating plate is rotatably connected inside the fixed cover, a threaded rod is fixedly installed at the center of the rotating plate, a nut is passed through and fixed at the center of the arch frame, the threaded rod is threadedly connected to the nut, a rotating arm is fixedly installed at the other end of the threaded rod, an extension arm is hinged at the other end of the rotating arm, and a U-shaped bar is fixedly installed at the other end of the extension arm.

[0010] Based on the above, a preset groove is provided on the side of the sound insulation board facing the housing of the broadcast transmitter, and a through groove communicating with the preset groove is provided on the top of the sound insulation board.

[0011] Based on the above, a positioning plate is fixedly installed at the bottom of the sound insulation board, and two groups of positioning rods are fixedly installed at the bottom of the connecting cover, and the two groups of positioning rods are clamped on both sides of the positioning plate.

[0012] Based on the above, the suction assembly includes an L-shaped plate 1 fixedly installed on the top of the arch frame, and the horizontal part of the L-shaped plate 1 is fixedly installed with two groups of sliding columns 2 that are slidably connected, and a pressure plate is fixedly installed on the bottom end of the sliding column 2, and a spring is fixedly installed between the pressure plate and the horizontal part of the L-shaped plate 1. An exhaust pipe is fixed through the center of the pressure plate, and the exhaust pipe is slidably connected to the horizontal part of the L-shaped plate 1. A rubber ring is fixedly installed on the bottom of the pressure plate, and the rubber ring is fitted on the top of the preset groove, and the rubber ring is sleeved on the outside of the through groove opening, and a one-way valve is provided on the surface of the exhaust pipe.

[0013] Based on the above, an L-shaped plate 2 is fixedly installed on the top of the second sliding column, the exhaust pipe is fixed on the horizontal part of the second L-shaped plate, the vertical part of the second L-shaped plate is attached to the surface of the arch frame, and an L-shaped steel sheet is fixedly installed on the bottom end of the second L-shaped plate, and the L-shaped steel sheet is inserted in the U-shaped strip.

[0014] The present invention has substantial features and progress over the prior art. Specifically, the present invention covers the outside of the sound insulation board by a connecting cover, and presses the sound insulation board onto the housing of the broadcast transmitter. The pressure applied to the sound insulation board is relatively uniform, thereby avoiding damage to the sound insulation board. When installing and disassembling the sound insulation board, the distance between the connecting cover and the housing of the broadcast transmitter can be adjusted by rotating the threaded rod, thereby facilitating the installation and disassembly of the sound insulation board. By setting a preset groove, a cavity is formed between the sound insulation board and the housing of the broadcast transmitter, and the exhaust pipe sucks the inside of the cavity to form a vacuum, thereby ensuring sound insulation and noise reduction of the broadcast transmitter. At the same time, the air pressure inside the cavity is lower than the external air pressure, so that the connection between the sound insulation board and the housing of the broadcast transmitter is more firmly established, which has the advantages of convenient installation and disassembly and good sound insulation and noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0016] Figure 2 It is a three-dimensional upward-looking structural schematic diagram of the utility model.

[0017] Figure 3 It is a three-dimensional explosion structure schematic diagram of the utility model.

[0018] Figure 4 The utility model is a three-dimensional exploded rear view structure schematic diagram.

[0019] Figure 5 It is a structural schematic diagram of the three-dimensional assembly of the sound insulation board and the suction component of the utility model.

[0020] Explanation of the reference numerals: 100, arch frame; 200, clamping assembly; 300, spacing adjustment assembly; 400, sound insulation board; 500, suction assembly; 101, push plate; 201, sliding column one; 202, connecting cover; 203, slot; 204, positioning rod; 301, fixing cover; 302, rotating plate; 303, threaded rod; 304, nut; 305, rotating arm; 306, extension arm; 307, U-shaped bar; 401, preset groove; 402, through groove; 403, positioning plate; 501, L-shaped plate one; 502, sliding column two; 503, pressure plate; 504, spring; 505, exhaust pipe; 506, rubber ring; 507, one-way valve; 508, L-shaped plate two; 509, L-shaped steel sheet. DETAILED DESCRIPTION

[0021] 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.

[0022] like Figure 1-Figure 5 As shown, a noise reduction device for an AM medium wave broadcast transmitter comprises an arch frame 100 fixedly mounted on the housing of the broadcast transmitter, and the arch frame 100 is fixed to the housing of the broadcast transmitter by screws. A clamping assembly 200 is slidably connected inside the arch frame 100, and a spacing adjustment assembly 300 is threadedly connected at the center of the arch frame 100, and the spacing adjustment assembly 300 is rotatably connected to the surface of the clamping assembly 200, and the spacing adjustment assembly 300 is used to adjust the spacing between the clamping assembly 200 and the housing of the broadcast transmitter, and a sound insulation board 400 is arranged between the clamping assembly 200 and the housing of the broadcast transmitter, and a cavity is formed between the sound insulation board 400 and the housing of the broadcast transmitter, and a suction assembly 500 is arranged on the top of the arch frame 100, and the suction assembly 500 elastically abuts against the top of the sound insulation board 400, and the suction assembly 500 is used to suck the air inside the cavity.

[0023] The clamping assembly 200 includes four sets of sliding columns 201 that penetrate and slide on the arch frame 100. The four sets of sliding columns 201 are respectively located at the corners of the arch frame 100. The ends of the four sets of sliding columns 201 are fixedly installed with connecting covers 202. The moving path of the connecting covers 202 is guided by the sliding columns 201. The connecting covers 202 are sleeved on the outside of the sound insulation board 400 to position the sound insulation board 400 and prevent the sound insulation board 400 from moving. The sound insulation board 400 is provided with a preset groove 401 on the side facing the housing of the broadcast transmitter, and a through groove 402 that communicates with the preset groove 401 is provided on the top of the sound insulation board 400. By fixing the arch frame 100 on the housing of the broadcast transmitter, and then adjusting the distance between the connecting cover 202 and the housing of the broadcast transmitter through the spacing adjustment assembly 300, the distance is made greater than the thickness of the sound insulation board 400. The sound insulation board 400 is inserted between the connecting cover 202 and the housing of the broadcast transmitter, and then the connecting cover 202 is driven to move toward the housing of the broadcast transmitter through the spacing adjustment component 300. The connecting cover 202 is sleeved on the outside of the sound insulation board 400, and the sound insulation board 400 is pressed against the housing of the broadcast transmitter; the sound insulation board 400 and the housing of the broadcast transmitter form a cavity through the preset groove 401, and then connected with the through groove 402 through the suction component 500, the air inside the cavity is sucked to form a vacuum cavity, thereby further enhancing the noise reduction effect on the broadcast transmitter.

[0024] When in use, the spacing adjustment assembly 300 includes a fixed cover 301 fixedly installed at the center of the connecting cover 202, and a rotating piece 302 is rotatably connected in the fixed cover 301. The rotating piece 302 is limited by the fixed cover 301 so that the rotating piece 302 will not be separated from the connecting cover 202. A threaded rod 303 is fixedly installed at the center of the rotating piece 302, and a nut 304 is fixedly passed through the center of the arch frame 100. The threaded rod 303 is threadedly connected to the nut 304, so that when the threaded rod 303 is rotated, the connecting cover 202 is driven to move, and the spacing between the connecting cover 202 and the arch frame 100 is adjusted. A rotating arm 305 is fixedly installed at the other end of the threaded rod 303, and an extension arm 306 is hinged at the other end of the rotating arm 305, and a U-shaped bar 307 is fixedly installed at the other end of the extension arm 306. By assembling the rotating arm 305 , the extension arm 306 and the U-shaped bar 307 , the force arm for rotating the threaded rod 303 is increased, so that the threaded rod 303 can be driven to rotate conveniently.

[0025] Specifically, a positioning plate 403 is fixedly installed at the bottom of the sound insulation board 400, and two groups of positioning rods 204 are fixedly installed at the bottom of the connection cover 202, and the two groups of positioning rods 204 are clamped on both sides of the positioning plate 403. After the threaded rod 303 is rotated to make the connection cover 202 close to the arch frame 100, the sound insulation board 400 is inserted into the connection cover 202 and the housing of the broadcast transmitter. By aligning the positioning plate 403 with the two groups of positioning rods 204, the positioning plate 403 is inserted between the two groups of positioning rods 204 until the positioning plate 403 fits the bottom of the connection cover 202; at this time, the sound insulation board 400 is aligned with the connection cover 202, and when the threaded rod 303 is rotated in the opposite direction, the connection cover 202 just fits on the outside of the sound insulation board 400. Two groups of slots 203 distributed on the left and right are opened through the surface of the connection cover 202. Two sets of pusher plates 101 are fixedly installed on the inner side of the arch frame 100, and the pusher plates 101 correspond to the slots 203 one by one, and the pusher plates 101 are used to be inserted into the slots 203. When removing the sound insulation board 400, the threaded rod 303 can be rotated to make the connection cover 202 approach the arch frame 100. When the sound insulation board 400 is stuck inside the connection cover 202 due to friction, as the distance between the connection cover 202 and the arch frame 100 decreases, the pusher plate 101 is inserted into the slot 203 and extends from the slot 203, and the sound insulation board 400 is pushed out of the connection cover 202, so that the sound insulation board 400 is easily taken out.

[0026] The suction assembly 500 includes an L-shaped plate 501 fixedly installed on the top of the arch frame 100, and two groups of sliding columns 502 are fixedly installed and slidably connected on the horizontal part of the L-shaped plate 501. A pressure plate 503 is fixedly installed on the bottom end of the sliding column 502, and a spring 504 is fixedly installed between the pressure plate 503 and the horizontal part of the L-shaped plate 501. An exhaust pipe 505 is fixedly passed through the center of the pressure plate 503, and the exhaust pipe 505 is slidably connected to the horizontal part of the L-shaped plate 501. A rubber ring 506 is fixedly installed on the bottom of the pressure plate 503, and the rubber ring 506 is fitted on the top of the preset groove 401. Through the elasticity of the spring 504, the rubber ring 506 can fit more closely with the preset groove 401, thereby ensuring the connection effect between the exhaust pipe 505 and the through groove 402. The suction pipe 505 can be connected to a suction pump or the like through a hose to suck the air inside the preset groove 401, so that the inside of the preset groove 401 is in a vacuum state, thereby ensuring the noise reduction effect on the broadcast transmitter. The rubber ring 506 is sleeved on the outside of the opening of the through groove 402, and a one-way valve 507 is provided on the surface of the suction pipe 505. Through the provision of the one-way valve 507, the air inside the preset groove 401 can be discharged to the outside through the suction pipe 505, and the external air will not pass through the suction pipe 505 and enter the inside of the preset groove 401.

[0027] In reality, an L-shaped plate 508 is fixedly installed on the top of the second sliding column 502, and the exhaust pipe 505 is fixed on the horizontal part of the second L-shaped plate 508. The vertical part of the second L-shaped plate 508 is attached to the surface of the arch frame 100. Therefore, when removing the sound insulation board 400, the second L-shaped plate 508 can be held and pushed upward to separate the rubber ring 506 from the sound insulation board 400, so that the through groove 402 is connected to the external air and the vacuum state inside the preset groove 401 is released. An L-shaped steel sheet 509 is fixedly installed on the bottom of the second L-shaped plate 508, and the L-shaped steel sheet 509 is inserted into the U-shaped strip 307. The L-shaped steel sheet 509 is elastic. After the threaded rod 303 is rotated, the free end of the L-shaped steel sheet 509 can be pressed downward and the extension arm 306 can be deflected at the same time, so that the free end of the L-shaped steel sheet 509 is reset under its own elasticity, and the U-shaped strip 307 is just buckled at the bend of the L-shaped steel sheet 509. Thus, the assembly of the U-shaped bar 307, the extension arm 306 and the rotating arm 305 can be restrained from rotating, ensuring that the connection cover 202 is in a stable position. At the same time, the U-shaped bar 307 limits the L-shaped steel sheet 509, preventing the assembly of the L-shaped steel sheet 509 and the L-shaped plate 2 508 from moving up and down. When removing the sound insulation board 400, the limiting effect between the L-shaped steel sheet 509 and the U-shaped bar 307 can be released by pressing the free end of the L-shaped steel sheet 509 downward.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A noise reduction device for an AM medium wave broadcast transmitter, characterized in that: It includes an arch frame fixedly installed on the housing of a broadcast transmitter, a clamping assembly is slidably connected inside the arch frame, a spacing adjustment assembly is threadedly connected at the center of the arch frame, the spacing adjustment assembly is rotatably connected to the surface of the clamping assembly, the spacing adjustment assembly is used to adjust the spacing between the clamping assembly and the housing of the broadcast transmitter, a sound insulation board is arranged between the clamping assembly and the housing of the broadcast transmitter, a cavity is formed between the sound insulation board and the housing of the broadcast transmitter, a suction assembly is arranged on the top of the arch frame, the suction assembly is elastically abutted against the top of the sound insulation board, and the suction assembly is used to suck the air inside the cavity.

2. The noise reduction device for an AM medium wave broadcast transmitter according to claim 1, characterized in that: The clamping assembly includes four groups of sliding columns one that are slidably connected to the arch frame, the four groups of sliding columns one are respectively located at the corners of the arch frame, and the ends of the four groups of sliding columns one are fixedly installed with connecting covers, which are sleeved on the outside of the sound insulation board, and the surface of the connecting cover is penetrated by two groups of slots distributed on the left and right.

3. The noise reduction device for an AM medium wave broadcast transmitter according to claim 2, characterized in that: Two groups of push plates distributed on the left and right are fixedly installed on the inner side of the arch frame. The push plates correspond to the slots one by one, and the push plates are used to be plugged into the slots.

4. The noise reduction device for an AM medium wave broadcast transmitter according to claim 3, characterized in that: The spacing adjustment assembly includes a fixed cover fixedly installed at the center of the connecting cover, a rotating plate is rotatably connected in the fixed cover, a threaded rod is fixedly installed at the center of the rotating plate, a nut is passed through and fixed at the center of the arch frame, the threaded rod is threadedly connected to the nut, a rotating arm is fixedly installed at the other end of the threaded rod, an extension arm is hinged at the other end of the rotating arm, and a U-shaped bar is fixedly installed at the other end of the extension arm.

5. The noise reduction device for an AM medium wave broadcast transmitter according to claim 1, characterized in that: A preset groove is provided on the side of the sound insulation board facing the housing of the broadcast transmitter, and a through groove communicating with the preset groove is provided on the top of the sound insulation board.

6. The noise reduction device for an AM medium wave broadcast transmitter according to claim 5, characterized in that: A positioning plate is fixedly installed at the bottom of the sound insulation board, and two groups of positioning rods are fixedly installed at the bottom of the connecting cover, and the two groups of positioning rods are clamped on both sides of the positioning plate.

7. The noise reduction device for an AM medium wave broadcast transmitter according to claim 5, characterized in that: The suction assembly includes an L-shaped plate 1 fixedly mounted on the top of the arch frame, the horizontal portion of the L-shaped plate 1 is fixedly mounted with two groups of sliding columns 2 that are slidably connected, a pressure plate is fixedly mounted on the bottom end of the sliding column 2, a spring is fixedly mounted between the pressure plate and the horizontal portion of the L-shaped plate 1, an air extraction pipe is fixedly passed through the center of the pressure plate, the air extraction pipe is slidably connected to the horizontal portion of the L-shaped plate 1, a rubber ring is fixedly mounted on the bottom of the pressure plate, the rubber ring is fitted on the top of the preset groove, the rubber ring is sleeved on the outside of the through groove opening, and a one-way valve is provided on the surface of the air extraction pipe.

8. The noise reduction device for an AM medium wave broadcast transmitter according to claim 7, characterized in that: An L-shaped plate 2 is fixedly installed on the top of the second sliding column, the exhaust pipe is fixed on the horizontal part of the second L-shaped plate, the vertical part of the second L-shaped plate is attached to the surface of the arch frame, and an L-shaped steel sheet is fixedly installed on the bottom end of the second L-shaped plate, and the L-shaped steel sheet is inserted in the U-shaped strip.

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