CN212206816U

CN212206816U - Marshall of noise reduction hits real appearance

Info

Publication number: CN212206816U
Application number: CN202021062465.7U
Authority: CN
Inventors: 刚增军; 高香龙; 李建平; 毛文斌
Original assignee: Shaanxi Provincial Communication Construction Group Co
Current assignee: Shaanxi Provincial Communication Construction Group Co
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2020-12-22
Anticipated expiration: 2030-06-11

Abstract

The utility model discloses a Marshall of noise reduction hits real appearance, include: cushion cap, box, chamber door, pedestal, examination mould assembly and hit real device, cushion cap below and pedestal fixed connection, cushion cap top and box fixed connection, the box rotates with the chamber door to be connected, the inside fixed mounting of box hits real device, examination mould assembly can dismantle with the box and be connected. The utility model discloses a first amortization of examination mould assembly and to the reflection of noise, the cotton second amortization of glass and to the reflection of noise, first deadening felt, polyester fiber acoustic celotex board and second deadening felt further absorb and weaken, by the box and the transparent plate of evacuation with the noise separation at last, greatly reduced the noise, solved marshall and hit the great problem of real appearance during operation noise, protected test personnel's hearing and avoided test personnel to receive noise interference.

Description

Marshall of noise reduction hits real appearance

Technical Field

The application relates to a Marshall compaction device capable of reducing noise.

Background

The Marshall compaction device is vital to the mix proportion design of asphalt mixture and the molding of a mixture test piece in road engineering, is a test device which is extremely commonly used, and can generate quite large noise in the process of compacting the front and back surfaces of the test piece when the Marshall compaction device works, thereby causing serious influence on testers operating the Marshall compaction device and the surrounding environment. Is not beneficial to protecting and improving the production and living environment of people, so various effective measures are actively taken to reduce the noise generated in the experimental process.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned problem, the utility model provides a Marshall hit real appearance of noise reduction has solved the big problem of Marshall hit real appearance during operation noise, has protected the listening ability of experimenter and has avoided the experimenter to receive noise interference.

A marshall compaction apparatus for reducing noise, comprising: cushion cap, box, chamber door, pedestal, examination mould assembly and hit real device, cushion cap below and pedestal fixed connection, cushion cap top and box fixed connection, the box rotates with the chamber door to be connected, the inside fixed mounting of box hits real device, examination mould assembly can dismantle with the box and be connected.

Preferably, the bearing platform comprises a first steel plate, high-damping rubber and a second steel plate, the high-damping rubber is located between the first steel plate and the second steel plate, the upper portion of the high-damping rubber is in contact with the first steel plate and is fixedly connected with the first steel plate, and the lower portion of the high-damping rubber is in contact with the second steel plate and is fixedly connected with the second steel plate.

Preferably, the box body comprises an outer box body and an inner box body, the inner box body is fixedly connected with the bearing platform, the outer box body is sleeved on the outer side of the inner box body and fixedly connected with the bearing platform, a closed vacuum cavity is formed between the outer box body and the inner box body, and the inside of the vacuum cavity is vacuumized.

Preferably, the inside fixedly connected with noise control layer of interior box, noise control layer includes first deadening felt, polyester fiber acoustic celotex board and second deadening felt, second deadening felt and polyester fiber acoustic celotex board fixed connection, polyester fiber acoustic celotex board and first deadening felt fixed connection, first deadening felt and interior box fixed connection.

Preferably, the noise-proof layer further comprises glass wool, one side of the glass wool is fixedly connected with the second sound-proof felt, and a plurality of conical protrusions are formed on the other side of the glass wool.

Preferably, the box door comprises a door frame, a transparent plate and a self-locking handle, the door frame is rotatably connected with the box body, the transparent plate is arranged inside the door frame and fixedly connected with the door frame, the self-locking handle is arranged on the door frame, and a sealing rubber strip is fixedly connected to the door frame.

Preferably, the transparent plate is double-layer vacuum glass.

Preferably, the test mold assembly comprises a base, a test mold and a sleeve, the test mold is mounted above the base, the sleeve is mounted above the test mold, a first silencing layer is sleeved outside the test mold and fixedly connected with the first silencing layer, and a second silencing layer is sleeved outside the sleeve and fixedly connected with the second silencing layer.

Preferably, the first silencing layer is sleeved outside the second silencing layer, and the second silencing layer is sleeved outside the base.

Preferably, a conical surface folded inwards is formed above the first sound attenuation layer, and an opening is formed above the conical surface.

Preferably, the base is formed with a flange, a quick clamp is fixedly mounted inside the box body, and the quick clamp is in contact with the flange to fix the base inside the box body.

The utility model has the advantages of as follows: through the first amortization of examination mould assembly and the reflection to the noise, the cotton second amortization of glass and the reflection to the noise, the further absorption and the weakening of first deadening felt, polyester fiber acoustic celotex board and second deadening felt, by the box and the transparent plate of evacuation with the noise separation at last, greatly reduced the noise, solved marshall and hit the great problem of appearance during operation noise, protected test personnel's hearing and avoided test personnel to receive noise interference.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1: the three-dimensional structure of the utility model is shown schematically;

FIG. 2: the sectional structure of the box body of the utility model is schematically shown;

FIG. 3: the utility model discloses test the sectional structure schematic diagram of mould assembly.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The first embodiment is as follows:

as shown in fig. 1 to 3, the present embodiment provides a marshall compaction apparatus for reducing noise, comprising: cushion cap 1, box 2, chamber door 3, pedestal 4, examination mould assembly and hit real device 6 (adopt current device), 1 below of cushion cap and 4 fixed connection of pedestal, 1 top of cushion cap and 2 fixed connection of box, box 2 rotates with chamber door 3 to be connected, 2 inside fixed mounting of box have hit real device 6, examination mould assembly can dismantle with box 2 and be connected. Pedestal 4 is the concrete piece or the inside box that is provided with the heavy object, through the weight that increases pedestal 4, reduces the overall center of device, improves the stability of device, reduces vibrations. The bearing platform 1 is connected with the box body 2 and the pedestal 4 through screws.

Preferably, the bearing platform 1 comprises a first steel plate 11, a high-damping rubber 12 and a second steel plate 13, the high-damping rubber 12 is located between the first steel plate 11 and the second steel plate 13, the upper part of the high-damping rubber 12 is in contact with the first steel plate 11 and is fixedly connected with the first steel plate 11, and the lower part of the high-damping rubber 12 is in contact with the second steel plate 13 and is fixedly connected with the second steel plate 13. The first steel plate 11, the high damping rubber 12 and the second steel plate 13 are formed by compounding a screw and organic glue and are used for damping, buffering, absorbing and reducing noise.

Preferably, the box body 2 comprises an outer box body 21 and an inner box body 22, the inner box body 22 is fixedly connected with the bearing platform 1, the outer box body 21 is sleeved outside the inner box body 22 and is fixedly connected with the bearing platform 1, a closed vacuum cavity 20 is formed between the outer box body 21 and the inner box body 22, and the inside of the vacuum cavity 20 is vacuumized.

Preferably, the inner box 22 is fixedly connected with a noise-proof layer, the noise-proof layer includes a first sound-proof felt 23, a polyester fiber sound-proof board 24 and a second sound-proof felt 25, the second sound-proof felt 25 is fixedly connected with the polyester fiber sound-proof board 24, the polyester fiber sound-proof board 24 is fixedly connected with the first sound-proof felt 23, and the first sound-proof felt 23 is fixedly connected with the inner box 22.

Preferably, the noise prevention layer further comprises glass wool 26, wherein one side of the glass wool 26 is fixedly connected with the second deadening felt 25, and the other side is formed with a plurality of conical protrusions 261.

Preferably, the box door 3 comprises a door frame 30, a transparent plate 31 and a self-locking handle 32, the door frame 30 is rotatably connected with the box body 2, the transparent plate 31 is arranged inside the door frame 30 and is fixedly connected with the door frame 30, the self-locking handle 32 is arranged on the door frame 30, and the self-locking handle 32 enables the box door 3 to be tightly attached to the box body 2, so that noise is effectively isolated; a sealing rubber strip 33 is fixedly connected to the door frame 30. Preferably, another sealing rubber strip 33 is arranged at a position corresponding to the door frame 30 of the box body 2, the sealing rubber strips 33 of the door frame 30 and the box body 2 are both closed rectangles, and when the door frame 30 is closed, one of the sealing rubber strips 33 is sleeved outside the other sealing rubber strip 33, so that a double-layer sealing effect is achieved. The transparent plate 31 is made of transparent materials, so that the tester can observe the internal conditions conveniently.

Preferably, the transparent plate 31 is double-layer vacuum glass.

Preferably, the test mold assembly comprises a base 51, a test mold 52 and a sleeve 53, the test mold 52 is installed above the base 51, the sleeve 53 is installed above the test mold 52, a first muffling layer 54 is sleeved outside the test mold 52 and fixedly connected with the first muffling layer 54, and a second muffling layer 55 is sleeved outside the sleeve 53 and fixedly connected with the second muffling layer 55. The connection between the base 51, the test mold 52 and the sleeve 53 may be a shrink fit or a threaded connection. Preferably, the first and second sound-

deadening layers

54 and 55 are made of EPDM rubber.

Preferably, the first sound-deadening layer 54 is fitted around the outside of the second sound-deadening layer 55, and the second sound-deadening layer 55 is fitted around the outside of the base 51.

Preferably, an inwardly folded tapered surface 551 is formed above the first muffling layer 54, and an opening is formed above the tapered surface 551.

Preferably, the base 51 is formed with a flange, the rapid clamp 7 is fixedly mounted inside the box body 2, and the rapid clamp 7 is in contact with the flange to fix the base 51 inside the box body 2. Preferably, the flange can be provided with a positioning hole, a positioning column is fixedly connected above the bottom surface of the box body 2, and the positioning is completed by inserting the positioning column into the positioning hole.

The working principle is as follows:

the base 51, the test mold 52 and the sleeve 53 are assembled into a whole, and a cylindrical cavity with an upper opening is formed inside the base. After placing the prepared sample into the cavity and tamping, the base 51, the test mold 52 and the sleeve 53 are placed into the box body 2 together, the flange of the base 51 is fixed by the quick-action fixture 7, and then the base 51, the test mold 52 and the sleeve 53 are fixed.

In operation, the tamping hammers 61 of the tamping units 6 penetrate the openings of the conical surfaces 551 into the cavity and continuously reciprocate to strike the sample in the cavity. At this time, a large noise is generated, the noise at the side of the cavity is first partially absorbed by the first and second sound-

deadening layers

54 and 55, the noise at the upper surface of the cavity is absorbed by the tapered surface 551 and refracted toward the inside of the cavity, and the noise is reduced by multiple refractions of the noise inside the cavity.

Then, the noise is attenuated after passing through the first sound-deadening layer 54 and the second sound-deadening layer 55, and is refracted by the tapered protrusions 261 on the glass wool 26, and the noise is refracted continuously between the plurality of tapered protrusions 261 and absorbed by the tapered protrusions 261. The residual noise is absorbed and attenuated to the inner case 22 through the first deadening felt 23, the polyester fiber deadening sheet 24 and the second deadening felt 25. Because the vacuum cavity 20 and the transparent plate 31 are vacuumized and contain little gas, the noise can be blocked from being transmitted to the outside of the box body 2 to a great extent.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A marshall compaction apparatus for reducing noise, comprising: cushion cap (1), box (2), chamber door (3), pedestal (4), examination mould assembly and hit real device (6), cushion cap (1) below and pedestal (4) fixed connection, cushion cap (1) top and box (2) fixed connection, box (2) rotate with chamber door (3) and are connected, box (2) inside fixed mounting hits real device (6), examination mould assembly can dismantle with box (2) and be connected.

2. A marshall compaction tool with reduced noise according to claim 1, wherein: cushion cap (1) includes first steel sheet (11), high damping rubber (12) and second steel sheet (13), high damping rubber (12) are located between first steel sheet (11) and second steel sheet (13), high damping rubber (12) top and first steel sheet (11) contact and with first steel sheet (11) fixed connection, high damping rubber (12) below and second steel sheet (13) contact and with second steel sheet (13) fixed connection.

3. A marshall compaction tool with reduced noise according to claim 1, wherein: the box (2) comprises an outer box body (21) and an inner box body (22), the inner box body (22) is fixedly connected with the bearing platform (1), the outer box body (21) is sleeved on the outer side of the inner box body (22) and fixedly connected with the bearing platform (1), a closed vacuum cavity (20) is formed between the outer box body (21) and the inner box body (22), and the inside of the vacuum cavity (20) is vacuumized.

4. A marshall compaction tool with reduced noise according to claim 3, wherein: interior box (22) inside fixedly connected with noise control layer, noise control layer includes first deadening felt (23), polyester fiber acoustic celotex board (24) and second deadening felt (25), second deadening felt (25) and polyester fiber acoustic celotex board (24) fixed connection, polyester fiber acoustic celotex board (24) and first deadening felt (23) fixed connection, first deadening felt (23) and interior box (22) fixed connection.

5. The Marshall compaction device with reduced noise of claim 4, wherein: the noise-proof layer further comprises glass wool (26), one side of the glass wool (26) is fixedly connected with the second sound-proof felt (25), and a plurality of conical bulges (261) are formed on the other side of the glass wool (26).

6. A marshall compaction tool with reduced noise according to claim 1, wherein: the box door (3) comprises a door frame (30), a transparent plate (31) and a self-locking handle (32), the door frame (30) is rotatably connected with the box body (2), the transparent plate (31) is arranged inside the door frame (30) and fixedly connected with the door frame (30), the self-locking handle (32) is installed on the door frame (30), and a sealing rubber strip (33) is fixedly connected to the door frame (30); the transparent plate (31) is double-layer vacuum glass.

7. A marshall compaction tool with reduced noise according to claim 1, wherein: the test mould assembly comprises a base (51), a test mould (52) and a sleeve (53), wherein the test mould (52) is installed above the base (51), the sleeve (53) is installed above the test mould (52), a first silencing layer (54) is sleeved on the outer side of the test mould (52) and fixedly connected with the first silencing layer (54), and a second silencing layer (55) is sleeved on the outer side of the sleeve (53) and fixedly connected with the second silencing layer (55).

8. A marshall compaction tool with reduced noise according to claim 7, wherein: the first silencing layer (54) is sleeved on the outer side of the second silencing layer (55), and the second silencing layer (55) is sleeved on the outer side of the base (51).

9. A marshall compaction tool with reduced noise according to claim 7, wherein: an inward-folded conical surface (551) is formed above the first silencing layer (54), and an opening is formed above the conical surface (551).

10. A marshall compaction tool with reduced noise according to claim 7, wherein: the base (51) is formed with the flange, the inside fixed mounting of box (2) has quick anchor clamps (7), quick anchor clamps (7) and flange contact are fixed base (51) inside box (2).