Standard sieve for cement fineness detection

Abstract

The utility model relates to the technical field of cement detection, in particular to a standard screen for cement fineness detection, which comprises a negative pressure screen analysis instrument body and a mounting hole arranged on the upper plane of the negative pressure screen analysis instrument body, a fine screen mesh cylinder component is detachably connected in the mounting hole, a vertical plate is arranged on one side of the fine screen mesh cylinder component, a round hole is arranged at the upper end of the vertical plate, and the fine screen mesh cylinder component is detachably connected with the mounting hole. A supporting shaft is rotationally connected into the round hole, the outer end of the supporting shaft is connected with a coarse screen cylinder assembly located over the fine screen cylinder assembly, and an opening in the upper end of the coarse screen cylinder assembly is in threaded connection with a storage cover body. A sliding type dust cover body is connected to an opening in the lower end of the coarse screen cylinder assembly and is suitable for preventing cement falling into the coarse screen cylinder assembly from drifting away to the outside; and the locking assembly is used for preventing the supporting shaft from rotating. The cement screening device is reasonable in structure, cement dust drifting outwards is reduced, large-particle cement in the square-hole screen and the negative-pressure screen can be conveniently cleaned, and maintenance convenience is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of cement detection, in particular to a standard sieve for cement fineness detection. Background Art

[0002] Cement is a powdery hydraulic inorganic gelling material. It becomes a slurry after adding water and stirring. It can harden in the air or in water, and can firmly bond materials such as sand and stone together. Cement is mainly a mixture of clinker and gypsum and other materials. The main chemical components include aluminum oxide, iron oxide, silicate, etc., among which aluminum oxide and iron oxide are the main components. For a long time, cement has been widely used in civil construction, water conservancy, national defense and other projects as an important gelling material. Therefore, before cement is put into use, its particle size performance needs to be analyzed, and fineness is a key indicator to characterize the overall coarseness of cement particles. In this analysis process, a fineness detection device needs to be used to detect cement.

[0003] Authorization announcement number CN 217314446 U discloses a cement fineness detection device, including a negative pressure sieve analyzer, a mounting slot and a square hole sieve, a mounting plate is installed on the top of the negative pressure sieve analyzer, a mounting slot is opened on the top of the mounting plate, a fixing plate is installed on the top of the mounting plate, and the fixing plate is located on one side of the mounting slot, a connecting plate is installed on one side of the fixing plate, a mounting shell is installed at one end of the connecting plate, a mounting cylinder is installed at the bottom of the mounting shell, and a vibration motor is symmetrically installed on the outer side of the square hole sieve. The utility model can effectively reduce the agglomeration of cement particles, improve the accuracy of the detection results, and at the same time improve efficiency, will not cause waste of manpower, and has a higher degree of automation.

[0004] The above-mentioned prior art solution has the following defects: after the cement is screened by the square hole sieve, it falls into the negative pressure screen through the mounting cylinder and the telescopic cylinder. There is a gap between the lower end of the telescopic cylinder and the bottom of the negative pressure screen. Since the cement falls from a high place, a large amount of dust will be generated when the cement falls and contacts the negative pressure screen, which will drift to the outside, causing a great impact on the working environment. In addition, after the cement is screened by the square hole sieve and the negative pressure screen, some large particles of cement are attached to the inner surfaces of the square hole sieve and the negative pressure screen. Since the square hole sieve and the negative pressure screen are not easy to remove for cleaning, they need to be cleaned with brushes and other tools, which reduces the convenience of maintenance. Utility Model Content

[0005] The main technical problem solved by the utility model is to provide a standard sieve for cement fineness detection, reduce cement dust drifting to the outside, facilitate cleaning of large cement particles in the square hole sieve and the negative pressure sieve, and enhance the convenience of maintenance.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a standard sieve for cement fineness detection, comprising: a negative pressure sieve analyzer body and a mounting hole arranged on the upper plane thereof, a fine screen cylinder assembly is detachably connected in the mounting hole, a vertical plate is arranged on one side of the fine screen cylinder assembly, a circular hole is arranged on the upper end of the vertical plate, a support shaft is rotatably connected in the circular hole, a coarse screen cylinder assembly located directly above the fine screen cylinder assembly is connected to the outer end of the support shaft, and a storage cover is threadedly connected to the upper end opening of the coarse screen cylinder assembly;

[0007] The lower end opening of the coarse screen cylinder assembly is connected with a sliding dust cover, which is suitable for preventing the cement dropped in the coarse screen cylinder assembly from drifting to the outside;

[0008] A stop assembly is also included to prevent the support shaft from rotating.

[0009] By adopting the above technical scheme, when in use, the cement to be tested is put into the inner cavity of the coarse screen cylinder assembly, and the sliding dust cover is operated to move downward and cover the opening of the fine screen cylinder assembly. The coarse screen cylinder assembly works to screen the cement, and large particles of cement remain in the coarse screen cylinder assembly, and small particles of cement flow downward. The small particles of cement pass through the inner cavity of the sliding dust cover and fall into the inner cavity of the fine screen cylinder assembly, thereby reducing the dust generated when the small particles of cement come into contact with the fine screen cylinder assembly and drifting to the outside, reducing the impact on the working environment, and starting the negative pressure sieving instrument body for sieving, and then taking out the sieving The cement after weighing is calculated to obtain the result. After the screening work is completed, there are large particles of cement in the coarse screen cylinder assembly. After operating the stop assembly, it is convenient to rotate the rotating support shaft 180 degrees so that the large diameter end of the coarse screen cylinder assembly faces downward, and the large particles of cement in the coarse screen cylinder assembly fall into the storage cover body. After removing the storage cover body, the large particles of cement are collected, which is convenient for cleaning the inner cavity of the coarse screen cylinder assembly. Next, the fine screen cylinder assembly is taken out of the mounting hole and inverted, so as to clean out the unscreened cement in the fine screen cylinder assembly for collection, thereby improving the convenience of maintenance.

[0010] In a preferred example, the utility model can be further configured as follows: the fine screen cylinder assembly includes a lower outer cylinder and a lower inner cylinder arranged in the inner cavity thereof, the inner hole of the lower inner cylinder is connected to a negative pressure screen, the outer cylindrical surface of the lower inner cylinder is connected to a plurality of first springs in an annular array, one end of the first spring away from the lower inner cylinder is connected to the inner wall of the lower outer cylinder, the outer cylindrical surface of the lower inner cylinder is connected to a first vibration motor, the outer cylindrical surface of the lower outer cylinder is connected to a plurality of limit blocks in an annular array, the limit blocks are in contact with the upper plane of the negative pressure sieving instrument body, and the upper end opening of the lower inner cylinder is provided with a screen cover body.

[0011] By adopting the above technical solution, the first vibration motor drives the lower inner cylinder to vibrate, the lower inner cylinder drives the negative pressure screen to vibrate, the negative pressure screen screens the cement, and the negative pressure sieving instrument body works to analyze the screened cement.

[0012] In a preferred example, the utility model can be further configured as follows: the coarse screen cylinder assembly includes a conical cylinder and an upper cylinder arranged in the inner cavity thereof, the inner cavity of the upper cylinder is connected to a filter screen, a plurality of second springs are connected to the annular array of the outer cylindrical surface of the upper cylinder, one end of the second spring away from the upper cylinder is connected to the inner wall of the conical cylinder, the outer circle of the upper cylinder is connected to a second vibration motor, and the conical cylinder is connected to the support shaft.

[0013] By adopting the above technical solution, cement to be tested for fineness is put into the upper cylinder, the cement falls on the filter screen, the second vibration motor drives the upper cylinder to vibrate, and the upper cylinder drives the filter screen to vibrate, so as to screen the cement. After the screening work is completed, when the coarse screen cylinder assembly is driven by the support shaft to rotate 180 degrees, the large diameter end of the conical cylinder opens downward, the second vibration motor drives the filter screen to vibrate again, and the large particles of cement on the filter screen fall into the storage cover and are collected, thereby improving the convenience of maintenance work.

[0014] In a preferred example, the utility model can be further configured as follows: the stopping assembly includes a butterfly bolt and a threaded hole arranged on the side of the vertical plate, the outer circular ring array of the support shaft is provided with four stopping grooves, the butterfly bolt is spirally connected in the threaded hole, and the end of the butterfly bolt is in contact with the inner wall of the stopping groove.

[0015] By adopting the above technical solution, the butterfly bolt is rotated and then closely contacts the inner wall of the retaining groove on the support shaft, thereby achieving the purpose of preventing the support shaft from rotating.

[0016] In a preferred example, the utility model can be further configured as follows: a rod-shaped handle is passed through one end of the support shaft away from the coarse screen cylinder assembly.

[0017] By adopting the above technical solution, the rod-shaped handle is manually operated to drive the support shaft to rotate, thereby improving the convenience of use.

[0018] In a preferred example, the utility model can be further configured as follows: the sliding dust cover includes a guide tube and a conical cover sleeved on the outer circle of the guide tube, the small diameter port of the conical cover is connected to the sliding tube, the large diameter end of the conical cover is connected to a flexible annular ring, the outer circle of the sliding tube is spirally penetrated by two butterfly bolts, and the lower end outer circle of the guide tube is connected to a limiting ring.

[0019] By adopting the above technical solution, the conical cover moves downward along the guide tube, and the flexible annular ring on the conical cover is arranged at the upper end opening of the fine screen cylinder assembly to prevent cement dust from scattering to the outside. After the screening work is completed, the conical cover moves upward, and the butterfly bolt 2 is rotated so that its end is in close contact with the outer circle of the guide tube to achieve the purpose of limiting. By using the limiting ring, the conical cover is prevented from separating from the guide tube.

[0020] In summary, the present invention includes at least one of the following beneficial technical effects:

[0021] 1. The conical cover body 52 on the sliding dust cover body moves downward and covers the opening of the fine screen cylinder assembly, which reduces the dust generated when small particles of cement come into contact with the fine screen cylinder assembly and drifts to the outside, thereby reducing the impact on the working environment.

[0022] 2. The rotating support shaft rotates 180 degrees so that the large diameter end of the coarse screen cylinder assembly faces downward, and the large particles of cement in the coarse screen cylinder assembly fall into the storage cover. After removing the storage cover, the large particles of cement are collected, which makes it easy to clean the inner cavity of the coarse screen cylinder assembly, thereby improving the convenience of maintenance.

[0023] 3. After taking the fine screen mesh cylinder assembly out of the installation hole, turn it upside down, so as to clean out the unscreened cement in the fine screen mesh cylinder assembly for collection, thereby improving the convenience of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0025] Figure 1 The utility model is a structural schematic diagram of a preferred embodiment of a standard sieve for cement fineness detection.

[0026] Figure 2 yes Figure 1 Schematic diagram of the structure of the medium-coarse screen cylinder assembly.

[0027] Figure 3 yes Figure 1 Schematic diagram of the structure of the medium fine screen cylinder assembly.

[0028] Figure 4 yes Figure 1 Schematic diagram of the structure of the sliding dust cover.

[0029] In the figure: 1, negative pressure sieve analyzer body; 2, mounting hole; 30, fine screen cylinder assembly; 40, coarse screen cylinder assembly; 50, sliding dust cover; 60, stop assembly;

[0030] 11. vertical plate; 12. round hole; 13. support shaft; 14. storage cover; 15. rod-shaped handle;

[0031] 31. lower outer cylinder; 32. lower inner cylinder; 33. negative pressure screen; 34. first spring; 35. first vibration motor; 36. limit block; 37. screen cover;

[0032] 41. conical cylinder; 42. upper cylinder; 43. filter screen; 44. second spring; 45. second vibration motor;

[0033] 51. guide tube; 52. conical cover; 53. sliding tube; 54. flexible annular ring; 55. butterfly bolt 2; 56. limiting ring;

[0034] 61. Butterfly bolt 1; 62. Threaded hole; 63. Stop groove. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0036] It should be noted that these drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0037] Reference Figures 1 to 4, which is a standard sieve for cement fineness detection disclosed in the utility model, comprising: a negative pressure sieving instrument body 1 and a mounting hole 2 arranged on the upper plane thereof, a fine screen cylinder assembly 30 is detachably connected in the mounting hole 2, the fine screen cylinder assembly 30 comprises a lower outer cylinder 31 and a lower inner cylinder 32 arranged in its inner cavity, a negative pressure screen 33 is connected to the inner hole of the lower inner cylinder 32, a plurality of first springs 34 are connected to the outer circumferential surface of the lower inner cylinder 32 in an annular array, one end of the first spring 34 away from the lower inner cylinder 32 is connected to the inner wall of the lower outer cylinder 31, and the outer circumferential surface of the lower inner cylinder 32 is connected to the first vibration The motor 35 and the outer surface of the lower outer cylinder 31 are connected to a plurality of limit blocks 36 in an annular array. The limit blocks 36 are in contact with the upper plane of the negative pressure sieving instrument body 1 to prevent the lower outer cylinder 31 from moving downward. The upper end opening of the lower inner cylinder 32 is provided with a screen cover 37. The lower inner cylinder 32 contains cement, and the screen cover 37 is used to cover the upper end opening of the lower inner cylinder 32. The first vibration motor 35 drives the lower inner cylinder 32 to vibrate, and the lower inner cylinder 32 drives the negative pressure screen 33 to vibrate. The negative pressure screen 33 screens the cement, and the negative pressure sieving instrument body 1 works to analyze the cement.

[0038] A vertical plate 11 is provided on one side of the fine screen cylinder assembly 30, and a circular hole 12 is provided at the upper end of the vertical plate 11, and a support shaft 13 is rotatably connected in the circular hole 12, and the outer end of the support shaft 13 is connected to a coarse screen cylinder assembly 40 located directly above the fine screen cylinder assembly 30, and the upper end opening of the coarse screen cylinder assembly 40 is threadedly connected to a storage cover body 14; the coarse screen cylinder assembly 40 includes a conical cylinder 41 and an upper cylinder 42 arranged in its inner cavity, the inner cavity of the upper cylinder 42 is connected to a filter screen 43, and a plurality of second springs 44 are connected to a circular array on the outer circumferential surface of the upper cylinder 42, and the end of the second spring 44 away from the upper cylinder 42 is connected to the inner wall of the conical cylinder 41, and the outer circle of the upper cylinder 42 is connected to a second vibration motor 45, and the conical cylinder 41 is connected to the support shaft 13.

[0039] The lower end opening of the coarse screen cylinder assembly 40 is connected with a sliding dust cover 50, which is suitable for preventing cement dropped in the coarse screen cylinder assembly 40 from scattering to the outside; the sliding dust cover 50 includes a guide tube 51 and a conical cover 52 sleeved on the outer circle of the guide tube 51, the small diameter end of the conical cover 52 is connected with a sliding tube 53, and the large diameter end of the conical cover 52 is connected with a flexible annular ring 54, which is made of a rubber tube, and the outer circle of the sliding tube 53 is spirally penetrated with butterfly bolts 55. The outer circle of the lower end of the guide tube 51 is connected to a limiting ring 56; the conical cover body 52 moves downward along the guide tube 51, and the flexible annular ring 54 on the conical cover body 52 is sleeved on the upper end opening of the fine screen cylinder assembly 30 to prevent cement dust from scattering to the outside. After the screening work is completed, the conical cover body 52 moves upward, and the butterfly bolt 55 is rotated to make its end closely contact with the outer circle of the guide tube 51 to achieve the purpose of limiting. By using the limiting ring 56, the conical cover body 52 is prevented from separating from the guide tube 51.

[0040] It also includes a stop assembly 60 for preventing the support shaft 13 from rotating. The stop assembly 60 includes a butterfly bolt 61 and a threaded hole 62 arranged on the side of the vertical plate 11. The outer circular ring array of the support shaft 13 is provided with four stop grooves 63. The butterfly bolt 61 is spirally connected in the threaded hole 62, and the end of the butterfly bolt 61 is in contact with the inner wall of the stop groove 63.

[0041] A rod-shaped handle 15 is provided at one end of the support shaft 13 away from the coarse screen cylinder assembly 40 , and the rod-shaped handle 15 is operated to conveniently drive the support shaft 13 to rotate.

[0042] The implementation principle of this embodiment is as follows: when in use, the cement to be tested is put into the inner cavity of the coarse screen cylinder assembly 40, the cement is located in the filter screen 43, and the conical cover 52 is operated to move downward along the guide tube 51, the conical cover 52 and the flexible annular ring 54 cover the upper end opening of the lower inner cylinder 32, and the second vibration motor 45 on the coarse screen cylinder assembly 40 drives the filter screen 43 to vibrate to screen the cement, large particles of cement remain on the filter screen 43, and small particles of cement flow downward through the mesh, and the small particles of cement pass through the inner cavity of the guide tube 51 and the conical cover 52 and fall into the inner cavity of the fine screen cylinder assembly 30. Due to the action of the conical cover 52 and the flexible annular ring 54, the dust generated when the small particles of cement come into contact with the fine screen cylinder assembly 30 is reduced from floating to the outside , reducing the impact on the working environment, starting the negative pressure screening instrument body 1 for screening, then taking out the screened cement, weighing and calculating the result, after the screening work is completed, there are large particles of cement in the coarse screen cylinder assembly 40, after operating the butterfly bolt 61 on the stop assembly 60, it is convenient to rotate the rotating support shaft 13 180 degrees, so that the large diameter end of the conical cylinder 41 faces downward, and the large particles of cement in the upper cylinder 42 fall into the storage cover 14. After removing the storage cover 14, the large particles of cement are collected, which is convenient for cleaning the inner cavity of the coarse screen cylinder assembly 40. Next, the fine screen cylinder assembly 30 is taken out of the mounting hole 2 and inverted, so that the cement that has not been screened in the fine screen cylinder assembly 30 is cleaned out and collected, thereby improving the convenience of maintenance.

[0043] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A standard sieve for cement fineness detection, comprising: A negative pressure sieve analyzer body (1) and a mounting hole (2) arranged on the upper plane thereof, characterized in that a fine screen cylinder assembly (30) is detachably connected in the mounting hole (2), a vertical plate (11) is provided on one side of the fine screen cylinder assembly (30), a circular hole (12) is provided at the upper end of the vertical plate (11), a support shaft (13) is rotatably connected in the circular hole (12), the outer end of the support shaft (13) is connected to a coarse screen cylinder assembly (40) located directly above the fine screen cylinder assembly (30), and a storage cover (14) is threadedly connected to the upper end opening of the coarse screen cylinder assembly (40); The lower end opening of the coarse screen cylinder assembly (40) is connected to a sliding dust cover (50) suitable for preventing cement dropped from the coarse screen cylinder assembly (40) from scattering to the outside; Also included is a stop assembly (60) for preventing the support shaft (13) from rotating.

2. The standard sieve for cement fineness detection according to claim 1, characterized in that: The fine screen cylinder assembly (30) comprises a lower outer cylinder (31) and a lower inner cylinder (32) arranged in the inner cavity thereof, the inner hole of the lower inner cylinder (32) is connected to a negative pressure screen (33), the outer cylindrical surface of the lower inner cylinder (32) is connected to a plurality of first springs (34) in an annular array, one end of the first spring (34) away from the lower inner cylinder (32) is connected to the inner wall of the lower outer cylinder (31), the outer cylindrical surface of the lower inner cylinder (32) is connected to a first vibration motor (35), the outer cylindrical surface of the lower outer cylinder (31) is connected to a plurality of limit blocks (36) in an annular array, the limit blocks (36) are in contact with the upper plane of the negative pressure sieving instrument body (1), and the upper end opening of the lower inner cylinder (32) is provided with a screen cover (37).

3. The standard sieve for cement fineness detection according to claim 1, characterized in that: The coarse screen cylinder assembly (40) comprises a conical cylinder (41) and an upper cylinder (42) arranged in the inner cavity of the conical cylinder (41); the inner cavity of the upper cylinder (42) is connected to a filter screen (43); the outer circumferential surface of the upper cylinder (42) is connected to a plurality of second springs (44) in an annular array; one end of the second spring (44) away from the upper cylinder (42) is connected to the inner wall of the conical cylinder (41); the outer circumference of the upper cylinder (42) is connected to a second vibration motor (45); and the conical cylinder (41) is connected to the support shaft (13).

4. The standard sieve for cement fineness detection according to claim 1, characterized in that: The stop assembly (60) comprises a butterfly bolt (61) and a threaded hole (62) arranged on the side of the vertical plate (11); the outer circular ring array of the support shaft (13) is provided with four stop grooves (63); the butterfly bolt (61) is screwed into the threaded hole (62); the end of the butterfly bolt (61) is in contact with the inner wall of the stop groove (63).

5. The standard sieve for cement fineness detection according to claim 1, characterized in that: A rod-shaped handle (15) is provided at one end of the support shaft (13) away from the coarse screen cylinder assembly (40).

6. The standard sieve for cement fineness detection according to claim 1, characterized in that: The sliding dust cover (50) comprises a guide tube (51) and a conical cover (52) sleeved on the outer circle of the guide tube (51); the small diameter end of the conical cover (52) is connected to a sliding tube (53); the large diameter end of the conical cover (52) is connected to a flexible annular ring (54); the outer circle of the sliding tube (53) is spirally penetrated by two butterfly bolts (55); the outer circle of the lower end of the guide tube (51) is connected to a limiting ring (56).

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