Cement fineness negative pressure screen analysis instrument

Abstract

The utility model discloses a cement fineness negative pressure screen analysis instrument which comprises a machine body, a cyclone cylinder is fixedly connected to the upper portion of the machine body, an analysis screen is connected to the cyclone cylinder in a clamped mode, a screen cover is arranged at a screen opening of the analysis screen, a dust collector and a dust collection bottle are arranged in the machine body, and the air inlet end of the dust collector is connected with a port of the dust collection bottle through a first air pipe. The dust collecting bottle is communicated with the cyclone cylinder through a second air pipe, a filter screen is arranged at a port of the dust collecting bottle corresponding to the second air pipe, and a beating mechanism is arranged on the machine body and driven to beat the screen cover; according to the negative pressure screen analysis instrument provided by the utility model, in the screen analysis process, the screen cover is continuously beaten by utilizing the beating mechanism, and cement on the screen cover is shaken into the analysis screen, so that the cement in the analysis screen can be subjected to screen analysis, and the accuracy degree of an experiment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fineness detection equipment, in particular to a cement fineness negative pressure screening instrument. Background Art

[0002] The negative pressure sieve analyzer is an instrument used to test the fineness of silicate cement, ordinary silicate cement, slag silicate cement, fly ash silicate cement and composite silicate cement. It is mainly composed of an analysis sieve, a vacuum cleaner, a cyclone and a box. The bottom end of the analysis sieve is connected to the upper end of the cyclone, and the lower end of the cyclone is connected to a dust collecting bottle. The top opening of the cyclone is connected to the vacuum cleaner through a hose. The vacuum cleaner is located in the box below the negative pressure sieve analyzer, and the vacuum cleaner discharges the filtered air through the exhaust port at its upper end.

[0003] For example, the patent with publication number CN210923398U discloses a negative pressure sieving instrument, which belongs to the field of fineness detection equipment, including a body, an analysis sieve is arranged on the body, a cover is arranged on the top of the analysis sieve, a cyclone is arranged on one side of the body, the cyclone is connected with the bottom of the analysis sieve, an ash collecting bottle is arranged at the bottom of the cyclone, a vacuum cleaner is arranged in the body, an inlet pipe and an outlet pipe are arranged on the vacuum cleaner, the inlet pipe is connected with the cyclone, a dust bag is sleeved on the outlet pipe, an auxiliary pressing block is arranged at the open end of the dust bag, a first boss and a second boss are arranged on the outer wall of the outlet pipe, a pressing spring is arranged on the side of the first boss close to the second boss, a pressing plate is slidably arranged on the outlet pipe and located between the first boss and the second boss, the pressing plate is fixedly connected to the pressing spring, and when the auxiliary pressing block is located between the pressing plate and the second boss, one end of the pressing plate away from the pressing spring abuts against the auxiliary pressing block; the utility model has the advantage of being easy to load and unload the dust bag on the vacuum cleaner.

[0004] The disadvantage of the prior art is that, during the screening process of cement, the screen cover is easily adhered to the cement, and this part of the cement cannot be screened, thereby affecting the accuracy of the experimental results. Utility Model Content

[0005] The utility model aims to provide a negative pressure sieve analyzer which can prevent cement from adhering to the sieve cover.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A cement fineness negative pressure sieving instrument comprises a body, a cyclone is fixedly connected to the upper part of the body, an analysis sieve is clamped on the cyclone, a sieve cover is arranged at the sieve opening of the analysis sieve, a vacuum cleaner and an ash collecting bottle are arranged inside the body, an air inlet end of the vacuum cleaner is connected to the port of the ash collecting bottle through a first air pipe, the ash collecting bottle is connected to the cyclone through a second air pipe, a filter is arranged at the port of the ash collecting bottle corresponding to the second air pipe, and a knocking mechanism is arranged on the body, and the knocking mechanism is driven to knock the sieve cover.

[0008] The above-mentioned negative pressure sieve analyzer, the knocking mechanism includes a knocking head and a knocking rod. The upper part of the body is located outside the cyclone and is fixedly connected to a mounting seat. One end of the knocking rod is rotatably connected to the mounting seat through a rotating shaft, and the other end of the knocking rod is bent toward the top of the sieve cover. The knocking head is fixedly connected to the other end of the knocking rod, and the knocking rod is driven to rotate to drive the knocking head to knock the sieve cover.

[0009] The above-mentioned negative pressure screening instrument, the cyclone tube includes a motor, a T-shaped cyclone head and a dust hood, the dust hood is fixed to the inside of the mounting base, the horizontal end of the cyclone head is in the dust hood, and the vertical end of the cyclone head passes through the dust hood and the mounting base for rotation, a T-shaped air duct is arranged in the cyclone head, the second air pipe is dynamically sealed and connected to the vertical end of the cyclone head, the motor is installed in the body, and the output end of the motor is transmission-connected to the vertical end of the cyclone head.

[0010] The above-mentioned negative pressure sieve analyzer has four groups of knocking mechanisms, and the four groups of knocking mechanisms are distributed along the circumference of the analysis sieve.

[0011] The above-mentioned negative pressure sieve analyzer has an inner gear ring rotatably installed on the inner side of the mounting seat, the inner gear ring coincides with the central axis of the analysis sieve, the output end of the motor is connected to the inner gear ring through a gear, an adjusting ring is coaxially fixed to the inner gear ring, a protrusion is provided on the adjusting ring, and an adjusting rod is installed at one end of each knocking rod close to the rotating shaft. When the inner gear ring drives the adjusting ring to rotate until the protrusion is opposite to the adjusting rod, the protrusion pushes the knocking rod to lift up through the adjusting rod, and after the protrusion is separated from the adjusting rod, the knocking rod falls again under the action of gravity.

[0012] In the negative pressure sieve analyzer, a torsion spring is installed on the rotating shaft of each knocking rod, and the torsion spring is used to maintain the knocking rod at an angle where the knocking head can contact the sieve cover.

[0013] The above-mentioned negative pressure sieve analyzer has a knocking head covered with a rubber pad.

[0014] In the above-mentioned negative pressure sieve analyzer, a cushion block is fixedly connected to the position of the sieve cover corresponding to the striking head.

[0015] In the negative pressure sieve analyzer, a ring groove matching the upper opening of the dust collecting cover is provided at the lower part of the analysis sieve, a deformable first sealing ring is fixedly connected to the outer wall of the ring groove, and the upper opening of the dust collecting cover is retracted inwards.

[0016] In the negative pressure sieve analyzer, a second sealing ring is arranged on the upper part of the analytical sieve, and the upper part of the second sealing ring is in contact with the inner wall of the sieve cover.

[0017] In the above technical scheme, the negative pressure sieving instrument provided by the utility model continuously strikes the sieve cover with a striking mechanism during the sieving process, thereby shaking the cement on the sieve cover into the analysis sieve, so that all the cement in the analysis sieve can be sieved, thereby improving the accuracy of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the structure provided for an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the internal structure of a machine body provided in an embodiment of the utility model;

[0021] Figure 3 The embodiment of the utility model provides Figure 2 The enlarged schematic diagram at A in the middle;

[0022] Figure 4 An enlarged schematic diagram of an adjustment ring provided in an embodiment of the utility model;

[0023] Figure 5 An enlarged schematic diagram of a screen cover provided in an embodiment of the utility model;

[0024] Figure 6 A cross-sectional view of an analysis sieve provided in an embodiment of the utility model;

[0025] Figure 7 The embodiment of the utility model provides Figure 3 Enlarged schematic diagram of point B in the middle.

[0026] Description of reference numerals:

[0027] 1. Machine body; 11. Mounting seat; 2. Analysis sieve; 21. First sealing ring; 22. Second sealing ring; 3. Sieve cover; 31. Spacer; 4. Beating mechanism; 41. Beating head; 42. Beating rod; 421. Torsion spring; 43. Adjusting rod; 44. Internal gear ring; 45. Adjusting ring; 451. Bump; 5. Cyclone; 51. Motor; 52. Cyclone head; 53. Dust hood. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] In the description of the present utility model, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" 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 circumstances.

[0030] like Figure 1-7 As shown, a cement fineness negative pressure screening instrument provided by an embodiment of the utility model comprises a body 1, a cyclone 5 is fixedly connected to the upper part of the body 1, an analysis sieve 2 is clamped on the cyclone 5, a sieve cover 3 is arranged at the sieve mouth of the analysis sieve 2, a vacuum cleaner and an ash collecting bottle are arranged inside the body 1, the air inlet end of the vacuum cleaner is connected to the port of the ash collecting bottle through a first air pipe, the ash collecting bottle is connected to the cyclone 5 through a second air pipe, a filter is arranged at the port of the ash collecting bottle corresponding to the second air pipe, a knocking mechanism 4 is arranged on the body 1, and the knocking mechanism 4 is driven to knock the sieve cover 3.

[0031] Specifically, the body 1 is the main structure of the negative pressure sieving instrument. The lower part of the body 1 is provided with a cavity for accommodating a vacuum cleaner and an ash collecting bottle. A sieve is provided in the analysis sieve 2. The analysis sieve 2 with different sieve holes is selected according to the experimental requirements. It should be noted that a control unit is also provided on the body 1. The control unit is used to adjust the gear position of the vacuum cleaner and set the sieving time. This is a prior art and can be directly applied without further explanation. Optionally, the ash collecting bottle is installed on the upper part of the cavity through a mounting frame, such as Figure 2 As shown, the air suction end of the vacuum cleaner is connected to the port of the ash collecting bottle through the first air pipe, and the ash collecting bottle is connected to the cyclone barrel 5 through the second air pipe. When the device is in use, the weighed cement is poured into the analysis sieve 2, the analysis sieve 2 is clamped onto the cyclone barrel 5, and the opening of the analysis sieve 2 is sealed by the sieve cover 3, and the vacuum cleaner is started. The vacuum cleaner draws air in the cyclone barrel 5 through the first air pipe and the second air pipe, so that the air pressure in the cyclone barrel 5 is lower than the external air pressure, thereby realizing the function of negative pressure screening. This is the prior art and can be directly applied. Optionally, the knocking mechanism 4 is a rod with a round end, and a cylinder is installed on the body 1. The rod is fixed to the telescopic end of the cylinder. The cylinder continuously retracts and contracts to drive the rod to reciprocate in a certain area, thereby realizing the effect of knocking the sieve cover 3.

[0032] In this embodiment, during the screening process, the sieve cover 3 is continuously struck by the striking mechanism 4 to shake the cement on the sieve cover 3 into the analysis sieve 2, so that all the cement in the analysis sieve 2 can be screened, thereby improving the accuracy of the experiment.

[0033] Furthermore, the knocking mechanism 4 includes a knocking head 41 and a knocking rod 42. The upper part of the body 1 is located on the outside of the cyclone 5 and is fixedly connected to a mounting seat 11. One end of the knocking rod 42 is rotatably connected to the mounting seat 11 through a rotating shaft, and the other end of the knocking rod 42 is bent above the sieve cover 3. The knocking head 41 is fixedly connected to the other end of the knocking rod 42. The knocking rod 42 is driven to rotate to drive the knocking head 41 to knock the sieve cover 3.

[0034] Specifically, the diameter of the knocking head 41 is larger than the diameter of the knocking rod 42. Optionally, the end of the knocking rod 42 is bent into a horizontal state. When one end of the knocking rod 42 corresponding to the rotating shaft is in a vertical state, the end of the knocking rod 42 corresponding to the knocking head 41 is in a horizontal state, and at this time the knocking head 41 is in contact with the sieve cover 3. At this time, the knocking rod 42 is driven to reciprocate within a certain angle range, and drives the knocking head 41 to move synchronously to realize the knocking function. Optionally, a rotating cylinder is used as a driving member to drive the knocking rod 42 to rotate. The rotating cylinder is installed on the mounting seat 11, and the rotating shaft of the knocking rod 42 is connected to the output end of the rotating cylinder.

[0035] Furthermore, the cyclone barrel 5 includes a motor 51, a T-shaped cyclone head 52 and a dust cover 53. The dust cover 53 is fixed to the inside of the mounting base 11. The horizontal end of the cyclone head 52 is in the dust cover 53, and the vertical end of the cyclone head 52 passes through the dust cover 53 and rotates with the mounting base 11. A T-shaped air duct is arranged in the cyclone head 52, and the second air pipe is dynamically sealed with the vertical end of the cyclone head 52. The motor 51 is installed in the body 1, and the output end of the motor 51 is transmission-connected to the vertical end of the cyclone head 52.

[0036] Specifically, the length of the horizontal end of the cyclone head 52 is smaller than the inner diameter of the analysis sieve 2. In specific implementation, the horizontal width of the T-shaped air duct should be as close to the diameter of the screen as possible so that the cement on the screen can be fully screened. When the device is in use, the motor 51 drives the cyclone head 52 to rotate slowly, so that the T-shaped air duct can sweep through various places under the screen to comprehensively screen the cement on the screen. Optionally, the output shaft of the motor 51 is equipped with a gear, and the vertical end of the cyclone head 52 is equipped with another gear. The motor 51 drives the cyclone head 52 to rotate slowly through the meshing of the two gears.

[0037] Furthermore, four groups of knocking mechanisms 4 are provided, and the four groups of knocking mechanisms 4 are distributed along the circumference of the analysis sieve 2 .

[0038] Specifically, by providing multiple groups of knocking mechanisms 4 , the screen cover 3 can be knocked from multiple directions when the device is used, thereby improving the knocking effect and preventing cement from adhering to the screen cover 3 .

[0039] Furthermore, an inner ring gear 44 is rotatably installed on the inner side of the mounting seat 11, and the inner ring gear 44 coincides with the central axis of the analysis sieve 2. The output end of the motor 51 is transmission-connected to the inner ring gear 44 through a gear. An adjusting ring 45 is coaxially fixed to the inner ring gear 44, and a protrusion 451 is provided on the adjusting ring 45. An adjusting rod 43 is installed at one end of each knocking rod 42 close to the rotating shaft. When the inner ring gear 44 drives the adjusting ring 45 to rotate until the protrusion 451 is directly opposite to the adjusting rod 43, the protrusion 451 pushes the knocking rod 42 to lift up through the adjusting rod 43. After the protrusion 451 is separated from the adjusting rod 43, the knocking rod 42 falls again under the action of gravity.

[0040] Specifically, Figure 4 As shown, the protrusion 451 is arranged at the upper opening of the adjusting ring 45, and the inner gear ring 44 is driven to rotate by the motor 51, and the inner gear ring 44 drives the protrusion 451 on the adjusting ring 45 to contact the adjusting rod 43 in sequence. In this process, the adjusting rod 43 is always in contact with the upper part of the adjusting ring 45, that is, the adjusting rod 43 always slides along the upper opening of the adjusting ring 45. When the adjusting rod 43 slides from the bottom of the protruding position to the protruding vertex thereof, the adjusting rod 43 is gradually lifted up by the protruding part. At this time, the adjusting rod 43 drives the knocking rod 42 to be lifted up, so that the knocking head 41 is far away When the adjusting rod 43 slides from the protruding vertex of the protruding position to the bottom of the other side, the knocking rod 42 falls back under the action of the knocking head 41 and its own gravity, so as to knock the sieve cover 3. In specific implementation, the bottom of the protrusion 451 that preferentially contacts the adjusting rod 43 can be slightly higher than the bottom of the other side. With this arrangement, the knocking head 41 can hit the sieve cover 3 when it falls back, and the adjusting rod 43 does not contact the upper mouth of the adjusting ring 45 again at this time, so as to avoid the adjusting rod 43 always contacting the adjusting ring 45, resulting in insignificant knocking effect.

[0041] Furthermore, a torsion spring 421 is installed on the rotating shaft of each knocking rod 42 , and the torsion spring 421 is used to maintain the knocking rod 42 at an angle at which the knocking head 41 can contact the sieve cover 3 .

[0042] Specifically, by installing a torsion spring 421 on the rotating shaft, when the adjusting rod 43 slides toward the bottom along the top of the protrusion 451, the torsion spring 421 can promote the falling back of the knocking rod 42, thereby improving the knocking effect on the sieve cover 3. In addition, since there are four groups of knocking mechanisms 4, and each knocking mechanism 4 knocks in sequence, when one group of knocking mechanisms 4 knocks on the sieve cover 3, the knocking rods 42 in the other three groups of knocking mechanisms 4 can keep the knocking head 41 in contact with the sieve cover 3 under the restriction of the torsion spring 421, and apply a certain pressure to the sieve cover 3, which has a certain stabilizing effect on the sieve cover 3 and prevents the sieve cover 3 from shifting during the knocking process and exposing the upper opening of the analysis sieve 2.

[0043] Furthermore, the striking head 41 is covered with a rubber pad.

[0044] Specifically, by covering the knocking head 41 with a rubber pad, the noise during knocking is reduced, and a certain protection effect is provided to the knocking head 41 and the sieve cover 3 .

[0045] In another embodiment of the present invention, cushion blocks 31 are fixedly connected to positions on the screen cover 3 corresponding to the striking heads 41 .

[0046] In this embodiment, a cushion block 31 is provided on the sieve cover 3 at a position corresponding to the striking head 41 , so as to protect the sieve cover 3 .

[0047] Furthermore, a ring groove matching the upper opening of the dust collecting cover 53 is formed at the lower part of the analysis sieve 2, a deformable first sealing ring 21 is fixedly connected to the outer wall of the ring groove, and the upper opening of the dust collecting cover 53 is retracted inwards.

[0048] Specifically, by retracting the upper opening of the dust hood 53 inward, that is, the inner diameter of the opening position of the dust hood 53 is smaller than the inner diameter of the adjacent part, and cooperating with the first sealing ring 21 provided on the ring groove, the analysis sieve 2 is sealed while improving the tightness of the fit between the analysis sieve 2 and the dust hood 53. In addition, the first sealing ring 21 is fixedly connected to the ring groove, which is convenient for cleaning the ring groove, avoiding the cumbersome steps of removing and cleaning the insertable sealing ring used in the prior art.

[0049] Furthermore, a second sealing ring 22 is provided on the upper portion of the analysis sieve 2 , and the upper portion of the second sealing ring 22 is in contact with the inner wall of the sieve cover 3 .

[0050] Specifically, the provision of the second sealing ring 22 improves the sealing effect between the sieve cover 3 and the analysis sieve 2, and can prevent friction between the sieve cover 3 and the upper opening of the analysis sieve 2 when the sieve cover 3 is struck, thereby having a certain protective effect on the contact position between the sieve cover 3 and the analysis sieve 2.

[0051] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A negative pressure sieve analyzer for cement fineness, comprising a body, a cyclone fixedly connected to the upper part of the body, an analysis sieve clamped on the cyclone, a sieve cover arranged at the sieve opening of the analysis sieve, a vacuum cleaner and an ash collecting bottle arranged inside the body, an air inlet end of the vacuum cleaner connected to the port of the ash collecting bottle through a first air pipe, the ash collecting bottle communicated with the cyclone through a second air pipe, a filter screen arranged at the port of the ash collecting bottle corresponding to the second air pipe, characterized in that: A knocking mechanism is arranged on the machine body, and the knocking mechanism comprises a knocking head and a knocking rod. The upper part of the machine body is located outside the cyclone and is fixedly connected with a mounting seat. One end of the knocking rod is rotatably connected to the mounting seat through a rotating shaft, and the other end of the knocking rod is bent toward the top of the sieve cover. The knocking head is fixedly connected to the other end of the knocking rod, and the knocking rod is driven to rotate to drive the knocking head to knock the sieve cover.

2. A cement fineness negative pressure sieve analyzer according to claim 1, characterized in that: The cyclone includes a motor, a T-shaped cyclone head and a dust hood. The dust hood is fixed to the inside of the mounting base. The horizontal end of the cyclone head is in the dust hood, and the vertical end of the cyclone head passes through the dust hood and the mounting base for rotation. A T-shaped air duct is arranged in the cyclone head. The second air pipe is dynamically sealed and connected to the vertical end of the cyclone head. The motor is installed in the body, and the output end of the motor is transmission-connected to the vertical end of the cyclone head.

3. A cement fineness negative pressure sieve analyzer according to claim 2, characterized in that: Four groups of knocking mechanisms are provided, and the four groups of knocking mechanisms are distributed along the circumference of the analysis sieve.

4. A cement fineness negative pressure sieve analyzer according to claim 3, characterized in that: An inner gear ring is rotatably installed on the inner side of the mounting seat, and the inner gear ring coincides with the central axis of the analysis sieve. The output end of the motor is connected to the inner gear ring through a gear. An adjusting ring is coaxially fixed to the inner gear ring, and a protrusion is provided on the adjusting ring. An adjusting rod is installed at one end of each knocking rod close to the rotating shaft. When the inner gear ring drives the adjusting ring to rotate until the protrusion is opposite to the adjusting rod, the protrusion pushes the knocking rod to lift up through the adjusting rod. After the protrusion is separated from the adjusting rod, the knocking rod falls again under the action of gravity.

5. A cement fineness negative pressure sieve analyzer according to claim 4, characterized in that: A torsion spring is installed on the rotating shaft of each knocking rod, and the torsion spring is used to maintain the knocking rod at an angle at which the knocking head can contact the screen cover.

6. A cement fineness negative pressure sieve analyzer according to claim 5, characterized in that: The striking head is covered with a rubber pad.

7. A cement fineness negative pressure sieve analyzer according to claim 6, characterized in that: Pads are fixedly connected to positions on the screen cover corresponding to the striking heads.

8. A cement fineness negative pressure sieve analyzer according to claim 7, characterized in that: The lower part of the analysis sieve is provided with an annular groove matched with the upper opening of the dust collecting cover, the outer wall of the annular groove is fixedly connected with a deformable first sealing ring, and the upper opening of the dust collecting cover is retracted inwards.

9. A cement fineness negative pressure sieve analyzer according to claim 8, characterized in that: A second sealing ring is arranged on the upper part of the analysis sieve, and the upper part of the second sealing ring is in contact with the inner wall of the sieve cover.

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