Cement fineness negative pressure screen analysis instrument with noise reduction mechanism

Abstract

The utility model relates to the technical field of cement production, and discloses a cement fineness negative pressure screen analysis instrument with a noise reduction mechanism. The cement fineness negative pressure screen analysis instrument with the noise reduction mechanism comprises a box body, a box cover is movably installed on the left side of the box body, sound absorption cotton is fixedly installed on the inner side face of the box cover and the inner wall of the box body, an air pump is fixedly installed in the box body, a connecting pipe is fixedly installed above the air pump, and the connecting pipe is fixedly connected with the box body. A connecting hose is fixedly installed at the upper end of the connecting pipe, when an air pump is started to pump out air in the negative pressure screen, the air can be conveyed into a spray head through an air inlet pipe, and therefore airflow sprayed out of the spray head can have the higher initial speed, and meanwhile a driving motor can drive the spray head to rotate through a connecting ring and a transmission belt; when the spray head rotates, the coverage area of airflow can be increased, so that the fluidization effect of cement is improved, the cement can be driven by the airflow to quickly pass through the negative pressure screen, and the screening efficiency of the cement is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cement production, and specifically relates to a negative pressure sieve analyzer for cement fineness with a noise reduction mechanism. Background Technique

[0002] A negative pressure sieve analyzer for cement fineness is a device that uses air pressure to screen powdered materials. It generally includes a box body, a sieve mesh, a cyclone, a dust collector, and a dust collection bottle. Among them, the dust collection bottle is fixed to the cyclone. When the negative pressure sieve analyzer for cement fineness uses air flow as the power medium for screening, the entire system maintains a negative pressure state. The fine powder material to be tested in the sieve mesh is in a fluidized state under the action of the air flow ejected from the rotating jet nozzle and moves with the air flow. Among them, the fine particles with a particle size smaller than the sieve mesh aperture are driven by the air flow to pass through the sieve mesh and are sucked into the dust collection bottle, while the coarse particles with a particle size larger than the sieve mesh aperture remain in the sieve mesh to achieve the purpose of screening.

[0003] For the existing Chinese utility model patent with the reference publication number: CN206450557U, it discloses a negative pressure sieve analyzer for cement fineness, including a box body, a sieve base arranged on the box body, a test sieve arranged on the sieve base, a cyclone communicated with the sieve base, a dust collection bottle arranged at the bottom end of the cyclone, and a dust collector connected to the cyclone and arranged inside the box body. A jet nozzle is arranged in the sieve base. The jet nozzle is connected through a jet device arranged on the sieve base, and the jet nozzle is rotationally connected to the sieve base through a synchronous motor arranged on the sieve base. A protrusion is arranged on the end face of the jet nozzle facing the test sieve, and the protrusion is in contact connection with the sieve mesh on the test sieve. An end cover is arranged at the port of the test sieve; the jet device is used to jet air into the test sieve by the jet nozzle, and at the same time, the protrusion on the jet nozzle is in contact with the sieve mesh on the test sieve. The synchronous motor drives the jet nozzle to rotate, so that the protrusion plays a role in scraping the sieve mesh on the test sieve and turning the cement in the test sieve, improving the screening effect of the test sieve.

[0004] Generally, the cement sieve analyzer makes the cement quickly pass through the negative pressure sieve in a negative pressure manner. Generally, a nozzle is arranged below the negative pressure sieve. When the dust collector works, external air will be blown towards the negative pressure sieve by the nozzle under the influence of air pressure. This method has a small air intake and a low initial air velocity, making the cement fully fluidized and affecting the passing efficiency of the cement. At the same time, since the cement sieve analyzer generally generates negative pressure through a dust collector, it will generate relatively large noise during normal operation. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the utility model provides a negative pressure sieve analyzer for cement fineness with a noise reduction mechanism, which has the advantages of improving the passing efficiency of cement through the negative pressure sieve and being able to reduce the generated noise, and solves the above technical problems.

[0007] (2) Technical solution

[0008] To achieve the above object, the utility model provides the following technical solution: A negative pressure sieve analyzer for fineness of cement with a noise reduction mechanism, comprising: a box body, a box cover is movably installed on the left side of the box body, sound-absorbing cotton is fixedly installed on the inner side surface of the box cover and the inner wall of the box body, an air pump is fixedly installed inside the box body, a connecting pipe is fixedly installed above the air pump, a connecting hose is fixedly installed at the upper end of the connecting pipe, a three-way joint is movably installed at the end of the connecting hose, a filter element is fitted and installed at the upper end of the three-way joint, a dust accumulation chamber is fixedly installed at the lower end of the three-way joint, a dust collection bottle is movably installed at the lower end of the dust accumulation chamber, a fixing frame is fixedly installed on the outside of the dust accumulation chamber, a limiting pipe is inserted and installed at the upper end of the inner wall of the box body, a limiting frame is fixedly installed inside the limiting pipe, a limiting bearing is fixedly installed below the limiting pipe and inside the limiting frame, a spray head is fixedly installed inside the limiting bearing, a connecting ring is inserted and installed at the lower end of the spray head, a transmission belt is fitted and installed on the outside of the connecting ring, a rotary joint is fixedly installed at the lower end of the spray head, an air inlet pipe is fixedly installed below the rotary joint, a negative pressure sieve is fitted and installed above the limiting pipe, and a sealing cover is fitted and installed above the negative pressure sieve; The box body can protect the air pump and limit the positions of the connecting pipe and the limiting pipe.

[0009] As a preferred technical solution of the utility model, the top end of the connecting pipe penetrates through the top plane structure of the box body, the air pump is communicated with the connecting hose through the connecting pipe, and the connecting hose is movably connected with the top end of the three-way joint through a threaded structure; The connecting pipe can facilitate the connection between the air pump and the connecting hose.

[0010] As a preferred technical solution of the utility model, the left end of the three-way joint penetrates through the right side elevation of the box body and is fixedly connected with the limiting pipe, the filter element extends from the inside of the three-way joint to the inside of the dust accumulation chamber, and the dust collection bottle is communicated with the three-way joint through the dust accumulation chamber; The three-way joint can facilitate the entry of cement into the dust accumulation chamber.

[0011] As a preferred technical solution of the utility model, the dust collection bottle is connected with the lower end of the dust accumulation chamber through a threaded structure, the left end of the fixing frame is fixedly connected with the box body, and the dust accumulation chamber is fixedly connected with the box body through the fixing frame; The dust collection bottle can facilitate the collection of cement passing through the negative pressure sieve.

[0012] As a preferred technical solution of the utility model, a support frame is fixedly installed on the top surface of the inner cavity of the box body, a driving motor is fixedly installed inside the support frame, a connecting ring is also fixedly installed on the outer side of the rotating shaft of the driving motor, and the connecting ring on the outer side of the rotating shaft of the driving motor is fitted with the rear end of the transmission belt; The connecting ring and the transmission belt can facilitate the driving motor to drive the spray head to rotate.

[0013] As a preferred technical solution of the present utility model, the spray head is rotationally connected between the limit pipe and the limit frame through a limit bearing, and the spray head is fixedly connected with the connecting ring; the spray head can guide the air flow to blow the dust above the negative pressure sieve.

[0014] As a preferred technical solution of the present utility model, the lower end of the spray head is rotationally connected with the air inlet pipe through a rotary joint, the air inlet pipe is fixedly connected with the air outlet end of the air pump, and the bottom end of the negative pressure sieve contacts the top end of the spray head; the air inlet pipe can facilitate the gas pumped out by the air pump to enter the interior of the spray head.

[0015] Compared with the prior art, the present utility model provides a cement fineness negative pressure sieve analyzer with a noise reduction mechanism, and has the following beneficial effects:

[0016] 1. Through the setting of the sound-absorbing cotton in the present utility model, the sound-absorbing cotton is fixedly installed on the inner side of the box cover and the inner wall of the box body. At the same time, the surface of the sound-absorbing cotton is provided with openings matching the opening structure of the inner wall of the box body. The box body can block the sound wave from spreading outwards. Since the sponge has air pores, it can absorb part of the energy of the sound wave. When the sound wave propagates to the sponge, resonance and friction will occur in the pores to weaken the vibration. At the same time, the heat dissipation holes of the box body are located above the front and rear side facades, and the air pump is located below the inner cavity of the box body as the sound source. The incident angle between the sound wave and the front and rear side facades of the box body is large, so as to prevent the sound wave from directly diffusing to the outside through the heat dissipation holes of the box body. This way can make the sound wave reflect multiple times inside the box body to reduce the intensity of the sound wave, so as to achieve the noise reduction effect.

[0017] 2. Through the setting of the limit pipe in the present utility model, the spray head is rotationally connected between the limit pipe and the limit frame through a limit bearing, and the lower end of the spray head is rotationally connected with the air inlet pipe through a rotary joint. The air inlet pipe is fixedly connected with the air outlet end of the air pump. When the air pump starts to pump out the air inside the negative pressure sieve, the air will be transported to the inside of the spray head through the air inlet pipe, so that the air flow ejected by the spray head can have a greater initial velocity. At the same time, the driving motor can drive the spray head to rotate through the connecting ring and the transmission belt. When the spray head rotates, it can increase the coverage area of the air flow, so as to improve the fluidization effect of the cement, make the cement quickly pass through the negative pressure sieve under the drive of the air flow, and improve the sieving efficiency of the cement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is a schematic diagram of the connection structure between the box body and the sound-absorbing cotton of the present utility model;

[0020] Figure 3 is a schematic diagram of the connection structure between the box body and the air pump of the present utility model;

[0021] Figure 4 Schematic diagram of the connection structure between the tee joint and the limit pipe of the present utility model;

[0022] Wherein: 1. Box body; 11. Box cover; 12. Sound-absorbing cotton; 2. Air pump; 21. Connecting pipe; 22. Connecting hose; 23. Tee joint; 24. Filter element; 25. Dust accumulation chamber; 26. Dust collection bottle; 27. Fixed bracket; 3. Limit pipe; 31. Limit bracket; 32. Limit bearing; 33. Sprayer; 34. Connecting ring; 35. Transmission belt; 36. Support frame; 37. Driving motor; 38. Rotary joint; 39. Air inlet pipe; 310. Negative pressure sieve; 311. Sealing cover. Specific embodiments

[0023] The following further describes the embodiments of the present utility model in detail with reference to the drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0024] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0026] Please refer to Figure 1 - Figure 4, in this embodiment, a cement fineness negative pressure sieve analyzer with a noise reduction mechanism includes: a box body 1, a box cover 11 is movably installed on the left side of the box body 1, a sound-absorbing cotton 12 is fixedly installed on the inner side surface of the box cover 11 and the inner wall of the box body 1, an air pump 2 is fixedly installed inside the box body 1, a connecting pipe 21 is fixedly installed above the air pump 2, an upper end of the connecting pipe 21 is fixedly installed with a connecting hose 22, a three-way joint 23 is movably installed at the end of the connecting hose 22, a filter element 24 is fitted and installed at the upper end of the three-way joint 23, a dust collecting chamber 25 is fixedly installed at the lower end of the three-way joint 23, a dust collecting bottle 26 is movably installed at the lower end of the dust collecting chamber 25, and a fixing frame 27 is fixedly installed outside the dust collecting chamber 25

[0027] The top end of the connecting pipe 21 penetrates through the top plane structure of the box body 1, the air pump 2 is communicated with the connecting hose 22 through the connecting pipe 21, and the connecting hose 22 is movably connected to the top end of the three-way joint 23 through a threaded structure.

[0028] The left end of the three-way joint 23 penetrates through the right side elevation of the box body 1 and is fixedly connected to a limit pipe 3. The filter element 24 extends from the inside of the three-way joint 23 to the inside of the dust collecting chamber 25, and the dust collecting bottle 26 is communicated with the three-way joint 23 through the dust collecting chamber 25.

[0029] The dust collecting bottle 26 is connected to the lower end of the dust collecting chamber 25 through a threaded structure. The left end of the fixing frame 27 is fixedly connected to the box body 1, and the dust collecting chamber 25 is fixedly connected to the box body 1 through the fixing frame 27.

[0030] Specifically, the box body 1 can protect the air pump 2 and limit the positions of the connecting pipe 21 and the limit pipe 3. The box cover 11 is movably connected to the box body 1 through screws, which is convenient for maintaining the equipment inside the box body 1. The sound-absorbing cotton 12 can facilitate noise reduction. The air pump 2 can extract the air inside the limit pipe 3. The connecting pipe 21 can facilitate the connection between the air pump 2 and the connecting hose 22. The connecting hose 22 can facilitate the connection between the connecting pipe 21 and the three-way joint 23. The three-way joint 23 can facilitate the entry of cement into the dust collecting chamber 25. The filter element 24 can prevent cement from entering the connecting hose 22. The dust collecting chamber 25 can facilitate the entry of cement into the dust collecting bottle 26. The dust collecting bottle 26 can facilitate the collection of cement passing through the negative pressure sieve 310. The fixing frame 27 can facilitate the fixation of the position of the dust collecting chamber 25.

[0031] At the upper end of the inner wall of the box body 1, a limit tube 3 is inserted and installed. Inside the limit tube 3, a limit frame 31 is fixedly installed. Below the limit tube 3 and inside the limit frame 31, a limit bearing 32 is fixedly installed. Inside the limit bearing 32, a nozzle 33 is fixedly installed. At the lower end of the nozzle 33, a connecting ring 34 is inserted and installed. On the outer side of the connecting ring 34, a transmission belt 35 is fitted and installed. At the lower end of the nozzle 33, a rotary joint 38 is fixedly installed. Below the rotary joint 38, an air inlet pipe 39 is fixedly installed. Above the limit tube 3, a negative pressure sieve 310 is fitted and installed. Above the negative pressure sieve 310, a sealing cover 311 is fitted and installed.

[0032] On the top surface of the inner cavity of the box body 1, a support frame 36 is fixedly installed. Inside the support frame 36, a driving motor 37 is fixedly installed. On the outer side of the rotating shaft of the driving motor 37, a connecting ring 34 is also fixedly installed. The connecting ring 34 on the outer side of the rotating shaft of the driving motor 37 is fitted with the rear end of the transmission belt 35.

[0033] The nozzle 33 is rotationally connected to the limit tube 3 and the limit frame 31 through the limit bearing 32, and the nozzle 33 is fixedly connected to the connecting ring 34.

[0034] The lower end of the nozzle 33 is rotationally connected to the air inlet pipe 39 through the rotary joint 38. The air inlet pipe 39 is fixedly connected to the air outlet end of the air pump 2. The bottom end of the negative pressure sieve 310 contacts the top end of the nozzle 33.

[0035] Specifically, the limit tube 3 can limit the position of the nozzle 33 and play a supporting role for the negative pressure sieve 310. The limit frame 31 limits the position of the nozzle 33. The limit bearing 32 can facilitate the rotation of the nozzle 33. The nozzle 33 can guide the airflow to blow the dust above the negative pressure sieve 310. The connecting ring 34 and the transmission belt 35 can facilitate the driving motor 37 to drive the nozzle 33 to rotate. The support frame 36 can limit the position of the driving motor 37. The rotary joint 38 can prevent the nozzle 33 from affecting the air inlet pipe 39 when rotating. The air inlet pipe 39 can facilitate the gas pumped out by the air pump 2 to enter the inside of the nozzle 33. The negative pressure sieve 310 can hold the cement sample for detection. The sealing cover 311 can seal the upper end of the negative pressure sieve 310.

[0036] In use, the sound-absorbing cotton 12 is fixedly installed on the inner side of the box cover 11 and the inner wall of the box body 1. At the same time, the surface of the sound-absorbing cotton 12 is provided with openings matching the opening structure of the inner wall of the box body 1. The box body 1 can block the outward diffusion of sound waves. Since the sponge has air pores, it can absorb part of the energy of sound waves. When sound waves propagate to the sponge, resonance and friction will occur in the pores, weakening the vibration. At the same time, the heat dissipation holes of the box body 1 are located above the front and rear side facades. The air pump 2 is used as a sound source and is located below the inner cavity of the box body 1. The incident angle between the sound waves and the front and rear side facades of the box body 1 is large, so as to prevent the sound waves from directly diffusing to the outside through the heat dissipation holes of the box body 1. This way can make the sound waves reflect multiple times inside the box body 1 to reduce the intensity of the sound waves, so as to achieve the noise reduction effect. The spray head 33 is rotationally connected between the limit bearing 32 and the limit pipe 3 and the limit frame 31. The lower end of the spray head 33 is rotationally connected to the air inlet pipe 39 through a rotary joint 38. The air inlet pipe 39 is fixedly connected to the air outlet end of the air pump 2. When the air pump 2 is started to pump out the air inside the negative pressure sieve 310, the air will be conveyed to the inside of the spray head 33 through the air inlet pipe 39, so that the airflow sprayed out by the spray head 33 can have a greater initial velocity. At the same time, the drive motor 37 can drive the spray head 33 to rotate through the connecting ring 34 and the transmission belt 35. When the spray head 33 rotates, it can increase the coverage area of the airflow, so as to improve the fluidization effect of the cement, so that the cement can quickly pass through the negative pressure sieve 310 under the drive of the airflow, so as to improve the sieving efficiency of the cement.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cement fineness negative pressure sieve analyzer with a noise reduction mechanism, characterized in that: include: A box body (1), a box cover (11) is movably mounted on the left side of the box body (1), a sound-absorbing cotton (12) is fixedly mounted on the inner side surface of the box cover (11) and the inner wall of the box body (1), an air pump (2) is fixedly mounted inside the box body (1), a connecting pipe (21) is fixedly mounted above the air pump (2), a connecting hose (22) is fixedly mounted on the upper end of the connecting pipe (21), a tee (23) is movably mounted on the end of the connecting hose (22), a filter element (24) is embedded and mounted on the upper end of the tee (23), a dust chamber (25) is fixedly mounted on the lower end of the tee (23), a dust collecting bottle (26) is movably mounted on the lower end of the dust chamber (25), a fixing frame (27) is fixedly mounted on the outer side of the dust chamber (25), and the box body (1) is provided with a dust collecting bottle (26) and a fixing frame (27) is fixedly mounted on the outer side of the dust chamber (25). A limit tube (3) is inserted and installed at the upper end of the inner wall of the body (1), a limit frame (31) is fixedly installed inside the limit tube (3), a limit bearing (32) is fixedly installed below the limit tube (3) and inside the limit frame (31), a nozzle (33) is fixedly installed inside the limit bearing (32), a connecting ring (34) is inserted and installed at the lower end of the nozzle (33), a transmission belt (35) is embedded and installed on the outer side of the connecting ring (34), a rotating joint (38) is fixedly installed at the lower end of the nozzle (33), an air intake pipe (39) is fixedly installed below the rotating joint (38), a negative pressure screen (310) is embedded and installed above the limit tube (3), and a sealing cover (311) is embedded and installed above the negative pressure screen (310).

2. The cement fineness negative pressure sieve analyzer with a noise reduction mechanism according to claim 1, characterized in that: The top end of the connecting pipe (21) passes through the top planar structure of the box body (1), the air pump (2) is connected to the connecting hose (22) through the connecting pipe (21), and the connecting hose (22) is movably connected to the top end of the tee (23) through a threaded structure.

3. The cement fineness negative pressure sieve analyzer with a noise reduction mechanism according to claim 1, characterized in that: The left end of the tee (23) passes through the right side vertical surface of the box body (1) and is fixedly connected to the limiting tube (3); the filter element (24) extends from the inside of the tee (23) to the inside of the dust storage chamber (25); and the dust collecting bottle (26) is connected to the tee (23) through the dust storage chamber (25).

4. The cement fineness negative pressure sieve analyzer with a noise reduction mechanism according to claim 1, characterized in that: The dust collecting bottle (26) is connected to the lower end of the dust collecting chamber (25) via a threaded structure, the left end of the fixing frame (27) is fixedly connected to the casing (1), and the dust collecting chamber (25) is fixedly connected to the casing (1) via the fixing frame (27).

5. The cement fineness negative pressure sieve analyzer with a noise reduction mechanism according to claim 1, characterized in that: A support frame (36) is fixedly mounted on the top surface of the inner cavity of the box body (1), a driving motor (37) is fixedly mounted inside the support frame (36), a connecting ring (34) is also fixedly mounted on the outer side of the rotating shaft of the driving motor (37), and the connecting ring (34) on the outer side of the rotating shaft of the driving motor (37) is engaged with the rear end of the transmission belt (35).

6. The cement fineness negative pressure sieve analyzer with a noise reduction mechanism according to claim 1, characterized in that: The spray head (33) is rotatably connected to the limit tube (3) and the limit frame (31) via a limit bearing (32), and the spray head (33) is fixedly connected to the connecting ring (34).

7. The cement fineness negative pressure sieve analyzer with a noise reduction mechanism according to claim 1, characterized in that: The lower end of the nozzle (33) is rotatably connected to the air inlet pipe (39) via a rotary joint (38); the air inlet pipe (39) is fixedly connected to the air outlet end of the air pump (2); and the bottom end of the negative pressure screen (310) is in contact with the top end of the nozzle (33).

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