Negative pressure screen analysis instrument with cleaning device

Abstract

The utility model relates to a negative pressure screen analysis instrument with a cleaning device, which comprises a negative pressure screen analysis instrument main body, an analysis screen and a screen cover, the screen cover covers the top of the analysis screen, the inner wall of the screen cover is connected with a scraper, the top of the scraper is in contact with the inner wall of the screen cover, and the top of the screen cover is connected with a rotating part; and the rotating piece is used for driving the scraping plate to rotate so as to drive the scraping plate to clean the inner wall of the screen cover. The rotating piece drives the scraper to rotate, so that the scraper cleans the inner wall of the screen cover, cement is scraped off from the inner wall of the screen cover, the cement on the inner wall of the screen cover is reduced, and the test precision is improved.

Description

Technical Field

[0001] The present application relates to the field of negative pressure sieving analyzers, and particularly to a negative pressure sieving analyzer with a cleaning device. Background Art

[0002] A negative pressure sieving analyzer is an instrument that uses air flow as the screening power medium, mainly used for the fineness detection of powder materials, and is particularly suitable for the screening of materials such as cement and fly ash. Its working principle is that under negative pressure, the air flow ejected by the rotating jet nozzle makes the powder material to be tested in the sieve net in a fluid state, and the fine particles are taken away by the air flow through the sieve net, while the coarse particles remain in the sieve net, thus realizing screening.

[0003] Chinese Patent with the authorization announcement number CN206450557U discloses a negative pressure sieving 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 cylinder communicated with the sieve base, an ash collecting bottle arranged at the bottom end of the cyclone cylinder, and a dust collector connected to the cyclone cylinder and arranged inside the box body. A jet nozzle is arranged inside the sieve base, the jet nozzle is connected through a jetting 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 net on the test sieve. An end cover is arranged at the port of the test sieve; through the jetting device, the jet nozzle jets air into the test sieve, and at the same time, the protrusion on the jet nozzle is in contact with the sieve net on the test sieve. The jet nozzle is driven to rotate by the synchronous motor, so that the protrusion plays a role in scraping the sieve net on the test sieve and turning the cement in the test sieve, improving the screening effect of the test sieve.

[0004] In view of the above related technologies, some cement placed in the test sieve during use will adhere to the end cover under the action of the air flow, resulting in that this part of the cement cannot be sieved and inspected, and further affecting the test results. Utility Model Content

[0005] In order to reduce the cement on the inner wall of the sieve cover and thus improve the test accuracy, the present application provides a negative pressure sieving analyzer with a cleaning device.

[0006] The negative pressure sieving analyzer with a cleaning device provided by the present application adopts the following technical solutions:

[0007] A negative pressure sieving analyzer with a cleaning device includes a negative pressure sieving analyzer main body, an analytical sieve, and a sieve cover. The analytical sieve is connected to the top of the negative pressure sieving analyzer main body, the sieve cover is covered on the top of the analytical sieve, a scraper is connected to the inner wall of the sieve cover, the top of the scraper is in contact with the inner wall of the sieve cover, a rotating member is connected to the top of the sieve cover, and the rotating member is used to drive the scraper to rotate so as to drive the scraper to clean the inner wall of the sieve cover.

[0008] By adopting the above technical solution, when cement is adhered to the inner wall of the screen cover, the rotating part drives the scraper to rotate, so that the scraper goes into the inner wall of the screen cover to clean it, thereby scraping the cement off the inner wall of the screen cover, thereby reducing the cement on the inner wall of the screen cover and improving the test accuracy.

[0009] Optionally, a frame is connected to the top of the negative pressure screening instrument body, and the frame is provided with a lifting slot, and the length direction of the lifting slot is consistent with the vertical direction. The frame is connected with a screw rod, a first motor, and a slider, and the length direction of the screw rod is consistent with the vertical direction. The screw rod is rotatably connected to the lifting slot, and the slider is slidably connected to the lifting slot along the vertical direction. The slider is threadedly sleeved on the screw rod, the first motor is connected to the frame, and the output shaft of the first motor is connected to one end of the screw rod. The rotating member is set for the second motor, the second motor is connected to the slider, and the output shaft of the second motor is connected to the scraper.

[0010] By adopting the above technical solution, the first motor drives the screw rod to rotate, thereby driving the slider to move in the vertical direction, thereby driving the sieve cover to move in the vertical direction, so that the sieve cover can move closer to or farther away from the analysis sieve.

[0011] Optionally, an annular groove is provided on the top of the analysis sieve, the annular groove is connected to the analysis sieve, the sieve cover is embedded in the annular groove, the sieve cover is rotatably connected in the annular groove, and the analysis sieve is connected to a locking assembly, which is used to lock the sieve cover to the top of the analysis sieve.

[0012] By adopting the above technical solution, when installing the sieve cover, the sieve cover is embedded in the annular groove, and the sieve cover is locked to the top of the analysis sieve through the locking assembly, so that the sieve cover is stably connected to the top of the analysis sieve, and an additional locking assembly is provided to minimize the second motor from driving the sieve cover to rotate, thereby affecting the cleaning effect of the scraper on the sieve cover.

[0013] Optionally, a mounting groove is provided on the inner wall of the annular groove, and the length direction of the mounting groove is consistent with the radial direction of the analysis sieve. The locking assembly includes a locking block and a spring, and the length direction of the spring is consistent with the length direction of the mounting groove. One end of the spring is connected to the inner wall of the mounting groove along its length direction, and the other end of the spring is connected to the locking block. The locking block is slidably connected to the mounting groove along the length direction of the mounting groove. A locking groove is provided on the peripheral side of the sieve cover, and the locking block is embedded in the locking groove.

[0014] By adopting the above technical solution, when installing the sieve cover, the sieve cover is embedded in the annular groove, and the spring drives the locking block to be embedded in the locking groove, so that the sieve cover is stably connected to the top of the analysis sieve.

[0015] Optionally, the locking assembly also includes a push plate, a connecting hole is opened at the top of the mounting groove, the length direction of the connecting hole is consistent with the length direction of the mounting groove, the length direction of the push plate is consistent with the vertical direction, the top end of the push plate passes through the connecting hole along the vertical direction, the bottom end of the push plate is connected to the top of the locking block, and the push plate is slidably connected in the connecting hole along the length direction of the mounting groove.

[0016] By adopting the above technical solution, when removing the sieve cover, the pushing plate is moved along the length direction of the installation groove, and the pushing plate drives the locking block to move along the length direction of the installation groove, and the locking block squeezes the spring, causing the spring to deform and move the locking block away from the locking groove, so that the sieve cover is conveniently away from the analysis sieve; when installing the sieve cover, the pushing plate drives the locking block to move, so that the locking block is embedded in the installation groove, so that the sieve cover is conveniently embedded in the annular groove; when the sieve cover is embedded in the annular groove, the operator releases the pushing plate, so that the spring restores its shape and drives the locking block to slide along the length direction of the installation groove and connect to the installation groove, and the spring drives the locking block to embed into the locking groove, so that the sieve cover is stably connected to the annular groove.

[0017] Optionally, the output shaft of the second motor is connected to a connecting shaft, the length direction of the connecting shaft is consistent with the vertical direction, the connecting shaft passes through the screen cover along its length direction, the screen cover is slidably sleeved on the connecting shaft, a sleeve is slidably sleeved on the bottom end of the connecting shaft, one end of the scraper is connected to the peripheral side of the sleeve, and the sleeve is detachably connected to the connecting shaft by bolts.

[0018] By adopting the above technical solution, the second motor drives the connecting shaft to rotate, thereby driving the sleeve and the scraper to rotate, and the sleeve is detachably connected to the connecting shaft by bolts, so as to facilitate cleaning or replacement of the scraper.

[0019] Optionally, a flexible layer is connected to the top of the scraper, and the flexible layer is in contact with the inner wall of the screen cover.

[0020] By adopting the above technical solution and adding a flexible layer, when the scraper cleans the inner wall of the screen cover, the flexible layer contacts the inner wall of the screen cover, thereby reducing the damage caused by friction between the scraper and the inner wall of the screen cover.

[0021] Optionally, a sealing ring is connected in the annular groove, the circumference of the sealing ring is consistent with the circumference of the analysis sieve, and the sealing ring is in contact with the sieve cover.

[0022] By adopting the above technical solution and adding a sealing ring, the gap between the screen cover and the inner wall of the ring groove is reduced, and the cement is prevented from being discharged from the analysis screen through the gap between the screen cover and the inner wall of the ring groove as much as possible.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When cement adheres to the inner wall of the sieve cover, the rotating member drives the scraper to rotate, so that the scraper cleans the inner wall of the sieve cover, thereby scraping the cement from the inner wall of the sieve cover, reducing the cement on the inner wall of the sieve cover and improving the test accuracy;

[0025] 2. The first motor drives the lead screw to rotate, thereby driving the slider to move in the vertical direction, and driving the sieve cover to move in the vertical direction, facilitating the sieve cover to approach or move away from the analytical sieve;

[0026] 3. When disassembling the sieve cover, move the push plate along the length direction of the installation groove. The push plate drives the locking block to move along the length direction of the installation groove. The locking block squeezes the spring, causing the spring to deform and the locking block to move away from the locking groove, thereby facilitating the sieve cover to move away from the analytical sieve. When installing the sieve cover, the push plate drives the locking block to move, so that the locking block is embedded in the installation groove, thereby facilitating the sieve cover to be embedded in the annular groove. When the sieve cover is embedded in the annular groove, the operator releases the push plate, so that the spring resumes its shape and pushes the locking block to slide along the length direction of the installation groove and be connected to the installation groove. The spring drives the locking block to be embedded in the locking groove, thereby enabling the sieve cover to be stably connected to the annular groove. Description of the Drawings

[0027] Figure 1 is the front view of this embodiment.

[0028] Figure 2 is the top view of this embodiment.

[0029] Figure 3 is this embodiment Figure 2 The sectional view taken along the line A-A in.

[0030] Figure 4 is this embodiment Figure 3 The enlarged view of part B in.

[0031] Figure 5 is this embodiment Figure 3 The enlarged view of part C in.

[0032] Description of the Reference Numerals: 100, the main body of the negative pressure sieve analyzer; 200, the analytical sieve; 210, the annular groove; 211, the sealing ring; 212, the installation groove; 213, the connection hole; 300, the sieve cover; 310, the scraper; 311, the flexible layer; 320, the second motor; 321, the connecting shaft; 322, the sleeve; 330, the locking groove; 400, the frame; 410, the lifting groove; 420, the lead screw; 430, the slider; 440, the first motor; 500, the locking assembly; 510, the locking block; 520, the spring; 530, the push plate. Detailed Description of the Specific Embodiment

[0033] The following is a further detailed description of this application in combination with the attached Figures 1-5 drawings.

[0034] An embodiment of the present application discloses a negative pressure sieving instrument with a cleaning device. Refer to Figure 1 and Figure 2 , a negative pressure sieving instrument with a cleaning device, including a negative pressure sieving instrument main body 100, an analytical sieve 200, and a sieve cover 300. The analytical sieve 200 is connected to the top of the negative pressure sieving instrument main body 100, and the sieve cover 300 is covered on the top of the analytical sieve 200. The central axis of the sieve cover 300 is collinear with the central axis of the analytical sieve 200.

[0035] Refer to Figure 1 and Figure 3 , a scraping plate 310 is connected to the inner wall of the sieve cover 300. The length direction of the scraping plate 310 is consistent with the radial direction of the sieve cover 300. A frame 400 is connected to the top of the negative pressure sieving instrument main body 100. The frame 400 is connected with a rotating member for driving the scraping plate 310 to rotate. The rotation axis of the scraping plate 310 is collinear with the central axis of the sieve cover 300. The top of the scraping plate 310 contacts the inner wall of the sieve cover 300.

[0036] The rotating member drives the scraping plate 310 to rotate, so that the scraping plate 310 cleans the inner wall of the sieve cover 300, thereby reducing the cement on the inner wall of the sieve cover 300 and improving the test accuracy.

[0037] Refer to Figure 1 and Figure 3 , a lifting groove 410 is formed in the frame 400. The length direction of the lifting groove 410 is consistent with the vertical direction. A lead screw 420 is rotatably connected in the lifting groove 410. The length direction of the lead screw 420 is consistent with the vertical direction. The two ends of the lead screw 420 along its length direction are respectively rotatably connected to the corresponding inner walls of the two sides of the lifting groove 410. A slider 430 is slidably connected in the lifting groove 410. The slider 430 is threadedly sleeved on the lead screw 420. The slider 430 is slidably connected in the lifting groove 410 along the vertical direction. A first motor 440 is connected to the top of the frame 400. The output shaft of the first motor 440 passes through the inner wall of the lifting groove 410 vertically downward and is connected to one end of the lead screw 420. The length direction of the slider 430 is consistent with the radial direction of the sieve cover 300. The end of the slider 430 away from the lead screw 420 extends to directly above the sieve cover 300 along its length direction. The rotating member is provided as a second motor 320. The second motor 320 is connected to the top of the slider 430. The output shaft of the second motor 320 passes through the slider 430 vertically downward.

[0038] Refer to Figure 3 and Figure 4The bottom end of the output shaft of the second motor 320 is connected with a connecting shaft 321, the length direction of the connecting shaft 321 is consistent with the vertical direction, and the central axis of the connecting shaft 321 is collinear with the central axis of the output shaft of the second motor 320. The connecting shaft 321 passes through the screen cover 300 along its length direction, the screen cover 300 is slidably sleeved on the connecting shaft 321, the screen cover 300 is slidably connected to the connecting shaft 321 along the vertical direction, a sleeve 322 is slidably sleeved on the bottom end of the connecting shaft 321, the central axis of the sleeve 322 is collinear with the central axis of the connecting shaft 321, one end of the scraper 310 is connected to the peripheral side of the sleeve 322 along its length direction, and the sleeve 322 is detachably connected to the connecting shaft 321 by bolts, and the bolts pass through the sleeve 322 along the radial direction of the connecting shaft 321 and are threadedly connected to the connecting shaft 321.

[0039] Reference Figure 3 and Figure 4 A flexible layer 311 is connected to the top of the scraper 310. The length direction of the flexible layer 311 is consistent with the length direction of the scraper 310. The flexible layer 311 is made of rubber material and contacts the inner wall of the sieve cover 300. The first motor 440 drives the screw rod 420 to rotate, so that the slider 430 slides in the sliding groove in the vertical direction. The slider 430 drives the sieve cover 300 to move in the vertical direction, so that the sieve cover 300 is close to or away from the analysis sieve 200.

[0040] Reference Figure 3 and Figure 5 The top of the analysis sieve 200 is provided with an annular groove 210, which is arranged in a circular ring, and the circumference of the annular groove 210 is consistent with the circumference of the sieve cover 300, the inner circle of the annular groove 210 is connected with the analysis sieve 200, the circumference of the sieve cover 300 is embedded in the annular groove 210, and the sieve cover 300 is rotatably connected in the annular groove 210. A sealing ring 211 is connected in the annular groove 210, and the circumference of the sealing ring 211 is consistent with the circumference of the analysis sieve 200, the central axis of the sealing ring 211 is colinear with the central axis of the sieve cover 300, the sealing ring 211 is made of rubber, and the sealing ring 211 is in contact with the sieve cover 300.

[0041] Reference Figure 3 and Figure 5 The analysis sieve 200 is connected with a locking assembly 500 for locking the sieve cover 300 on the top of the analysis sieve 200. The inner walls of the annular groove 210 on both sides of the radial direction of the analysis sieve 200 are provided with mounting grooves 212, and the length direction of the mounting grooves 212 is consistent with the radial direction of the analysis sieve 200. The top of the mounting grooves 212 is provided with connecting holes 213, and the length direction of the connecting holes 213 is consistent with the radial direction of the analysis sieve 200.

[0042] Reference Figure 3 and Figure 5, the locking assembly 500 includes a locking block 510 connected in the installation groove 212, a spring 520, and a pushing plate 530. The length direction of the spring 520 is the same as that of the installation groove 212. One end of the spring 520 is connected to the inner wall of the installation groove 212 along its length direction, and the other end of the spring 520 is connected to one end of the locking block 510. The length direction of the locking block 510 is the same as that of the installation groove 212, and the locking block 510 is slidably connected in the installation groove 212 along the length direction of the installation groove 212. The length direction of the pushing plate 530 is the same as the vertical direction. The bottom end of the pushing plate 530 is connected to the top of the locking block 510. The top end of the pushing plate 530 passes through the connection hole 213 along the vertical direction, and the pushing plate 530 is slidably connected in the connection hole 213 along the length direction of the connection hole 213. Two locking grooves 330 are provided on the circumferential side of the sieve cover 300. The two locking grooves 330 are respectively arranged on both sides of the sieve cover 300 along the radial direction of the sieve cover 300. The locking grooves 330 correspond to the locking blocks 510 one by one. One end of the locking block 510 away from the spring 520 is embedded in the locking groove 330. When the spring 520 is not squeezed, the locking block 510 is embedded in the locking groove 330, and the pushing plate 530 is arranged at one end of the connection hole 213 close to the locking groove 330.

[0043] When installing the sieve cover 300, the pushing plate 530 drives the locking block 510 to be embedded in the installation groove 212, and the spring 520 is squeezed and deformed, so as to facilitate the sieve cover 300 to be embedded in the annular groove 210. When the locking groove 330 approaches the locking block 510, the operator releases the pushing plate 530, the spring 520 restores its shape, and pushes the locking block 510 to be slidably connected in the installation groove 212 along the length direction of the installation groove 212. The spring 520 drives the locking block 510 to be embedded in the locking groove 330, so that the sieve cover 300 is stably connected to the top of the analytical sieve 200.

[0044] The implementation principle of a negative pressure sieve analyzer with a cleaning device in an embodiment of the present application is as follows: during the screening process of cement, when cement adheres to the inner wall of the sieve cover 300, the second motor 320 drives the scraper 310 to rotate, so that the scraper 310 cleans the inner wall of the sieve cover 300, thereby reducing the cement on the inner wall of the sieve cover 300 and improving the test accuracy. After the cement screening is completed, the pushing plate 530 is moved along the length direction of the installation groove 212. The pushing plate 530 is slidably connected in the connection hole 213 along the length direction of the connection hole 213, so that the pushing plate 530 drives the locking block 510 to be slidably connected in the installation groove 212 along the length direction of the installation groove 212. The locking block 510 squeezes the spring 520, causing the spring 520 to deform, and the locking block 510 is away from the locking groove 330, so as to facilitate the sieve cover 300 to be away from the analytical sieve 200.

[0045] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A negative pressure sieve analyzer with a cleaning device, comprising a negative pressure sieve analyzer main body (100), an analytical sieve (200), and a sieve cover (300). The analytical sieve (200) is connected to the top of the negative pressure sieve analyzer main body (100), and the sieve cover (300) is covered on the top of the analytical sieve (200), characterized in that: A scraper (310) is connected to the inner wall of the sieve cover (300). The top of the scraper (310) is in contact with the inner wall of the sieve cover (300). A rotating member is connected to the top of the sieve cover (300). The rotating member is used to drive the scraper (310) to rotate, thereby driving the scraper (310) to clean the inner wall of the sieve cover (300).

2. The negative pressure sieving instrument with a cleaning device according to claim 1, characterized in that: A frame (400) is connected to the top of the main body (100) of the negative pressure sieving instrument. A lifting groove (410) is formed in the frame (400). The length direction of the lifting groove (410) is the same as the vertical direction. The frame (400) is connected with a lead screw (420), a first motor (440), and a slider (430). The length direction of the lead screw (420) is the same as the vertical direction. The lead screw (420) is rotatably connected in the lifting groove (410). The slider (430) is slidably connected in the lifting groove (410) in the vertical direction. The slider (430) is threadedly sleeved on the lead screw (420). The first motor (440) is connected to the frame (400). The output shaft of the first motor (440) is connected to one end of the lead screw (420). The rotating member is a second motor (320). The second motor (320) is connected to the slider (430). The output shaft of the second motor (320) is connected to the scraper (310).

3. The negative pressure sieving instrument with a cleaning device according to claim 2, characterized in that: A ring groove (210) is formed in the top of the analytical sieve (200). The ring groove (210) communicates with the analytical sieve (200). The periphery of the sieve cover (300) is embedded in the ring groove (210). The sieve cover (300) is rotatably connected in the ring groove (210). The analytical sieve (200) is connected with a locking assembly (500). The locking assembly (500) is used to lock the sieve cover (300) to the top of the analytical sieve (200).

4. A negative pressure sieving instrument with a cleaning device according to claim 3, characterized in that: An installation groove (212) is formed in the inner wall of the ring groove (210). The length direction of the installation groove (212) is the same as the radial direction of the analytical sieve (200). The locking assembly (500) includes a locking block (510) and a spring (520). The length direction of the spring (520) is the same as the length direction of the installation groove (212). One end of the spring (520) in its length direction is connected to the inner wall of the installation groove (212). The other end of the spring (520) is connected to the locking block (510). The locking block (510) is slidably connected in the installation groove (212) in the length direction of the installation groove (212). A locking groove (330) is formed in the periphery of the sieve cover (300). The locking block (510) is embedded in the locking groove (330).

5. The negative pressure sieve analyzer with a cleaning device according to claim 4, characterized in that: The locking component (500) further includes a pushing plate (530). A connecting hole (213) is formed at the top of the installation groove (212). The length direction of the connecting hole (213) is the same as that of the installation groove (212). The length direction of the pushing plate (530) is the same as the vertical direction. The top end of the pushing plate (530) passes through the connecting hole (213) along the vertical direction. The bottom end of the pushing plate (530) is connected to the top of the locking block (510). The pushing plate (530) is slidably connected in the connecting hole (213) along the length direction of the installation groove (212).

6. The negative pressure sieving instrument with a cleaning device according to claim 2, characterized in that: The output shaft of the second motor (320) is connected with a connecting shaft (321). The length direction of the connecting shaft (321) is the same as the vertical direction. The connecting shaft (321) passes through the sieve cover (300) along its length direction. The sieve cover (300) is slidably sleeved on the connecting shaft (321). A sleeve (322) is slidably sleeved at the bottom end of the connecting shaft (321). One end of the scraping plate (310) is connected to the circumference of the sleeve (322). The sleeve (322) is detachably connected to the connecting shaft (321) by a sleeve bolt.

7. The negative pressure sieve analyzer with a cleaning device according to claim 1, characterized in that: A flexible layer (311) is connected to the top of the scraping plate (310). The flexible layer (311) contacts the inner wall of the sieve cover (300).

8. The negative pressure sieve analyzer with a cleaning device according to claim 3, characterized in that: A sealing ring (211) is connected in the annular groove (210). The circumference of the sealing ring (211) is the same as the circumference of the analytical sieve (200). The sealing ring (211) contacts the sieve cover (300).

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