Aggregate screening device and method for preparing UHPC premix

Abstract

The invention relates to the technical field of UHPC premix screening, and discloses an aggregate screening device for preparing UHPC premix and a method thereof. The device comprises an outer shell and a vibration motor arranged inside the outer shell, a coarse screen plate is fixed inside the outer shell, a fine screen plate is fixed inside the outer shell, and the fine screen plate is located below the coarse screen plate, and further comprises: a level adjustment part arranged on the outer shell and located between the coarse screen plate and the fine screen plate to adjust the screening level; a blowing part arranged between the fine screen plate and the coarse screen plate and connected to the level adjustment part; a protective part arranged through the blowing part, located inside the level adjustment part, and located above the blowing part; the invention uses an actuator to push the screening parts in the receiving and screening parts to unfold, and at the same time drives the air guide parts in the blowing part to move together, and uses high-pressure gas to push the protective part to open the air outlet of the blowing part, so that the high-pressure gas passes through the blowing part and is sprayed toward the coarse screen plate and the fine screen plate, and at the same time, during the level adjustment, the aggregate stuck on the coarse screen plate and the fine screen plate during the screening before the level adjustment is blown.

Description

Technical Field

[0001] The invention relates to the technical field of UHPC premix screening, and in particular to an aggregate screening device and a method for preparing a UHPC premix. Background Art

[0002] The aggregate screening device is a device that needs to be used before the UHPC premix preparation work. It can inject the aggregate to be prepared into the coarse screen plate with the support of the outer shell, and start the vibration motor with the support of the outer shell to generate vibration and transmit it to the outer shell, the coarse screen plate and the fine screen plate, so that the coarse screen plate and the fine screen plate can use the vibration to perform multi-stage screening on the received aggregate. However, the aggregate screening device for UHPC premix preparation still has defects.

[0003] For example, in actual operation, the fineness grade of aggregates used to produce UHPC premixes may change as needed. The screening grade of a conventional aggregate screening device is fixed, and the aggregates may clog the screening apertures of the coarse or fine screen plates, affecting the screening work and failing to meet the needs of screening grade adjustment. Summary of the invention

[0004] The invention provides an aggregate screening device for preparing UHPC premix, which is convenient for adjusting the number of screening grades and prevents the coarse screen plate and the fine screen plate from being blocked by aggregate after screening while adjusting the grades, thereby improving flexibility and functionality.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] In a first aspect, an aggregate screening device for preparing a UHPC premix comprises a housing and a vibration motor arranged inside the housing, a coarse screen plate is fixed inside the housing, a fine screen plate is fixed inside the housing, and the fine screen plate is located below the coarse screen plate, and further comprises:

[0007] A level adjustment part is arranged on the outer shell and is located between the coarse screen plate and the fine screen plate to adjust the number of screening levels;

[0008] a blowing part, arranged between the fine screen plate and the coarse screen plate, and connected to the level adjustment part, so as to blow the coarse screen plate and the fine screen plate during level adjustment;

[0009] A protection part is arranged through the blowing part, is located in the level adjustment part, and is above the blowing part to close and protect or open the blowing part;

[0010] The level adjustment part includes an actuator and a screening component, the actuator is connected to the screening component, the screening component includes a screening part, and the screening part is connected to the actuator;

[0011] The protection part includes a blocking piece and a pushing piece. The blocking piece is movably connected to the blowing part to protect and block the blowing part. The pushing piece is connected to the blowing part and the actuator to push the blocking piece to open when the coarse screen plate and the fine screen plate are blown under the guidance of the actuator.

[0012] Furthermore, the execution element includes:

[0013] An electric rod is fixed to the inner side of the housing and is located above the coarse screen plate;

[0014] An L rod, one end of which is fixed to the telescopic end of the electric rod;

[0015] A herringbone rod, fixed to the other end of the L rod and moving through the coarse screen plate;

[0016] The pull plate is fixed to the end of the herringbone rod away from the L rod.

[0017] Further, the screening device comprises:

[0018] There are two frame plates, and the two frame plates are fixed on the outside of the shell;

[0019] The rotating rod is installed through the frame plate;

[0020] A second spring, one end of which is fixedly connected to the frame plate and is sleeved on the outer side of the rotating rod;

[0021] There are two rotating discs, which are rotatably mounted on the outside of the rotating rod and fixedly connected to the other end of the second spring;

[0022] The screening part is rolled up between the two rotating discs to adjust the screening level after being unfolded.

[0023] Further, the blowing part includes an air jet component and an air guide component, the air guide component penetrates the air jet component and is interconnected, the air guide component is connected to the actuator, and the air jet component includes:

[0024] The trachea is fixed on the side of the pull plate close to the fine sieve plate;

[0025] There are multiple nozzles, and the multiple nozzles penetrate the air pipe and are fixedly connected at positions close to the fine sieve plate and the coarse sieve plate;

[0026] The flange pipe is fixed on the fine screen plate by fixing parts;

[0027] The wind hood has one end fixedly connected to the flange pipe and the other end fixedly connected to the air pipe.

[0028] Further, the air guide comprises:

[0029] The branch pipe is fixedly installed through the side of the trachea away from the fine sieve plate;

[0030] The flat nozzle is fixed to one end of the branch pipe close to the fine screen plate and extends into the wind hood;

[0031] The movable groove is arranged on the inner side of the herringbone rod, passes through the side of the herringbone rod close to the outer shell, and is communicated with the branch pipe;

[0032] The side blowing part is located on the inner side of the branch pipe, passes through the push piece, and is connected with the pull plate.

[0033] Furthermore, the blocking member comprises:

[0034] A T-rod is fixed on the outside of the air pipe and is located in the direction of the frame away from the turntable;

[0035] Connecting plate, the movable device is sleeved on the outside of the T-bar;

[0036] The rack rod is fixed at both ends of the connecting plate;

[0037] The sealing cap is provided in plurality and is fixed on the inner side of the frame rod and is fitted with the end of the nozzle away from the air pipe.

[0038] Further, the pusher comprises:

[0039] The third spring is mounted on the outside of the T-bar and located between the connecting plate and the air pipe;

[0040] The elliptical plate has one end fixedly connected to one end of the connecting plate and the other end fixedly connected to the frame rod and is located above the air pipe;

[0041] There are two sealing discs, which are movably arranged on the inner side of the branch pipe and fit with the inner wall of the branch pipe;

[0042] A connecting pipe, fixedly connected to the sealing disk and located between the two sealing disks;

[0043] The push part is arranged on the inner side of the movable groove, fixedly connected with the sealing disk, and located on the outer side of the herringbone rod.

[0044] Further, the push part includes:

[0045] a fourth spring, one end of which is fixedly connected to the sealing disk close to the herringbone rod;

[0046] A guide sleeve is sleeved on the outside of the herringbone rod, extends to the inside of the movable groove, and is fixedly connected to the other end of the fourth spring;

[0047] A connecting plate, fixed on the outer side of the guide sleeve;

[0048] The arc push block is fixed to the end of the connecting plate away from the guide sleeve and is located above the elliptical plate.

[0049] Further, the side-blowing part comprises:

[0050] There are multiple elastic ropes, and the multiple elastic ropes are symmetrically fixed on the sealing disk away from the fourth spring;

[0051] An air hole is opened through the interior of the sealing disk;

[0052] The plug is embedded in the inner side of the air hole and is in contact with the sealing disk away from the fourth spring;

[0053] The elastic rope is fixedly connected to the plug;

[0054] The air nozzle is fixedly arranged through the L rod and is communicated with the branch pipe and the movable groove.

[0055] In a second aspect, a method for screening aggregates for preparing a UHPC premix is ​​provided, the method comprising:

[0056] Start the vibration motor to generate vibration and transmit the vibration to the shell, which then transmits the vibration force to the coarse screen plate, fine screen plate and the grading part;

[0057] According to the need, the electric rod set in the actuator of the level adjustment part is controlled to extend, so that it pushes the screen in the screening part in the screening part to expand, so that the screen is expanded between the coarse screen plate and the fine screen plate to increase the number of screening levels;

[0058] According to the need, one end of the flange pipe in the jetting part arranged in the jetting part is connected to the pipeline for conveying high-pressure gas, so that the high-pressure gas enters the flange pipe and pushes the pusher arranged in the protective part along the jetting part, so that the pusher pushes the blocking part arranged in the protective part away from the jetting part;

[0059] Then, the high-pressure gas in the flange pipe of the jet component provided in the spraying part will be sprayed toward the fine screen plate and the coarse screen plate through the jet component, and move together with the expansion of the screen mesh in the screening part in the receiving and screening component provided in the actuator in the level adjustment part, and then the aggregate stuck on the fine screen plate and the coarse screen plate will be pushed to move by the sprayed gas during the movement;

[0060] The aggregate to be screened is injected into the inner side of the shell and falls onto the coarse screen plate, so that the coarse screen plate uses vibration to make part of the aggregate pass through the coarse screen plate and intercept the other part of the aggregate;

[0061] The aggregates that pass through the coarse screen will then fall onto the screen that is unfolded in the collecting screen, and the screen will vibrate to screen the aggregates again and intercept the aggregates that are larger than the screen aperture. The aggregates that pass through the screen will fall onto the fine screen.

[0062] Finally, the fine screen plate will use vibration to screen out the corresponding aggregates and intercept aggregates with larger pore sizes than itself.

[0063] The above solution of the present invention includes at least the following beneficial effects:

[0064] By setting a level adjustment part, the actuator in the level adjustment part is controlled to move under the support of the shell, so that the actuator pulls the screening part set in the level adjustment part, so that the screen in the screening part in the screening part is unfolded between the coarse screen plate and the fine screen plate. Because the screening aperture of the screen in the screening part is finer than that of the coarse screen plate and coarser than that of the fine screen plate, a screening level is added between the coarse screen plate and the fine screen plate by using the unfolded screen, thereby facilitating the adjustment of the screening level and improving flexibility.

[0065] By providing the protection part and the blowing part, when the adjustment part moves, the jet part and the protection part in the blowing part will be driven to move together. The protection part will use the blocking part to block the discharge end of the jet part to prevent aggregate from entering the jet part. According to the needs, the pipeline for conveying high-pressure gas can be connected with the flange pipe in the jet part before adjusting the screening stage. The high-pressure gas is used to push the push part in the protection part to move under the guidance of the gas guide part, and then the blocking part is separated from the jet part, so that the high-pressure gas can enter and pass through the jet part. While adjusting the screening stage, the gas is sprayed toward the coarse screen plate and the fine screen plate, and the stuck aggregate is pushed away by the gas to prevent the aggregate from getting stuck on the coarse screen plate and the fine screen plate and affecting the screening work, thereby improving the functionality. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 A schematic diagram of the overall three-dimensional structure of an aggregate screening device for preparing a UHPC premix provided in an embodiment of the present invention;

[0067] Figure 2 A schematic diagram of a three-dimensional structure of a housing and a winding rod assembly provided in an embodiment of the present invention;

[0068] Figure 3 A schematic diagram of a three-dimensional structure of a bracket, a first spring and a fixing plate assembly provided in an embodiment of the present invention;

[0069] Figure 4 A schematic diagram of a three-dimensional structure of a combination of a level adjustment part, a blowing part and a protection part provided in an embodiment of the present invention;

[0070] Figure 5 The embodiment of the present invention provides Figure 4 Schematic diagram of the structure at A in FIG.

[0071] Figure 6 The embodiment of the present invention provides Figure 4 Schematic diagram of the structure at B in FIG.

[0072] Figure 7 A three-dimensional exploded view of a combination of a level adjustment portion, an elliptical plate, an air pipe and a nozzle provided in an embodiment of the present invention;

[0073] Figure 8 A schematic diagram of a three-dimensional structure of a combination of a rotating disk, a frame plate and a second spring provided in an embodiment of the present invention;

[0074] Fig. 9 A schematic diagram of a three-dimensional cross-sectional structure of a combination of a connecting plate, an elliptical plate, a T-bar and a rack bar provided in an embodiment of the present invention;

[0075] Fig.10 A schematic diagram of the three-dimensional structure of the cross section of the herringbone rod, branch pipe and wind cover and the combination of the arc push block provided in the embodiment of the present invention;

[0076] Fig.11 The embodiment of the present invention provides Fig.10 Schematic diagram of the structure at C in FIG.

[0077] Fig.12 The embodiment of the present invention provides Fig.10 Schematic diagram of the structure at D in FIG.

[0078] Fig.13 A schematic cross-sectional three-dimensional structural diagram of a sealing disk and connecting pipe combination provided in an embodiment of the present invention.

[0079] Description of reference numerals:

[0080] In the figure: 1. housing; 101. coarse screen plate; 102. fine screen plate; 103. inclined plate; 104. support frame; 105. tray; 106. bucket; 2. support column; 201. vibration motor; 202. bracket; 203. first spring; 204. fixed plate; 205. support plate; 3. support sleeve; 301. fixed rod; 302. through groove; 303. electric rod; 304. L rod; 305. guide groove; 306. herringbone rod; 307. pull plate; 308. shelf plate; 309. rotating rod; 310. second spring; 311. rotating disk; 312. winding rod; 313, screen; 314, guide ring; 315, U plate; 4, air pipe; 401, nozzle; 402, wind hood; 403, flange pipe; 404, T rod; 405, connecting plate; 406, third spring; 407, elliptical plate; 408, support rod; 409, cover; 5, branch pipe; 501, flat nozzle tube; 502, sealing disk; 503, connecting pipe; 504, plug; 505, fourth spring; 506, movable groove; 507, guide sleeve; 508, connecting plate; 509, arc push block; 510, wind nozzle; 511, elastic rope; 512, air hole. DETAILED DESCRIPTION

[0081] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0082] like Figures 1 to 13As shown, an embodiment of the present invention provides an aggregate screening device for preparing UHPC premix, comprising a housing 1 and a vibration motor 201 arranged inside the housing 1, a coarse screen plate 101 is fixed inside the housing 1, a fine screen plate 102 is fixed inside the housing 1, and the fine screen plate 102 is located below the coarse screen plate 101, and further comprising:

[0083] The level adjustment part is arranged on the housing 1 and is located between the coarse screen plate 101 and the fine screen plate 102 to adjust the number of screening levels;

[0084] The blowing part is arranged between the fine screen plate 102 and the coarse screen plate 101 and connected to the level adjustment part to blow the coarse screen plate 101 and the fine screen plate 102 during level adjustment;

[0085] The protection part is arranged through the blowing part, and is located in the level adjustment part and above the blowing part, so as to close the protection or open the blowing part;

[0086] The level adjustment part includes an actuator and a screening component, the actuator is connected to the screening component, the screening component includes a screening part, and the screening part is connected to the actuator;

[0087] The protection part includes a blocking piece and a pushing piece. The blocking piece is movably connected to the blowing part to protect and block the blowing part. The pushing piece is connected to the blowing part and the actuator to push the blocking piece to open when the coarse screen plate 101 and the fine screen plate 102 are blown under the guidance of the actuator.

[0088] Specifically, the tops of the coarse screen plate 101 and the fine screen plate 102 are respectively fixed with inclined plates 103, the inclined plates 103 have a clear angle, a plurality of brackets 104 are fixed to a side of the fine screen plate 102 away from the coarse screen plate 101, a tray 105 is fixed to an end of the bracket 104 away from the fine screen plate 102, and two row buckets 106 are installed through the interior of the housing 1, and the two row buckets 106 are respectively located above the coarse screen plate 101 and the fine screen plate 102, and located on one side of the inclined plate 103;

[0089] Specifically, a support column 2 is fixed on the inner side of the outer shell 1, and the vibration motor 201 is fixedly connected to the support column 2 through a connecting component. A bracket 202 is symmetrically fixed to the outer side of the outer shell 1, a first spring 203 is fixed to the bottom of the bracket 202, and a fixing plate 204 is fixed to the end of the first spring 203 away from the bracket 202. A support plate 205 is fixed on the inner side of the outer shell 1, and the support plate 205 is located above the coarse screen plate 101, and a support sleeve 3 is installed through the interior of the outer shell 1.

[0090] In the actual application of this embodiment: the staff needs to use the fixing components to install the fixing plate 204 to the work site, so that the fixing plate 204 provides support for the first spring 203, and the first spring 203 supports the bracket 202, so that the bracket 202 can provide support for the shell 1, so that the shell 1 can stably support the coarse screen plate 101, the fine screen plate 102 and the bracket 205, and the support column 2, the support sleeve 3 and the fixing rod 301 can make the shell 1 more solid, the screening aperture of the coarse screen plate 101 is larger, and the screening aperture of the fine screen plate 102 is finer. , and has a certain inclination angle. After the aggregate screening device is installed, the staff needs to start the vibration motor 201 with the support of the support column 2, so that the vibration motor 201 generates vibration, and the vibration will be transmitted to the shell 1 through the support column 2, so that the shell 1 uses the vibration to push the bracket 202, and then the first spring 203 is pushed by the bracket 202 under the action of the vibration to expand and contract up and down with the support of the fixed plate 204, thereby increasing the vibration amplitude of the shell 1, and at the same time, the shell 1 will drive the coarse screen plate 101, the fine screen plate 102 and the support plate 205 to vibrate together;

[0091] Then the staff will inject the aggregates for preparing the UHPC premix that need to be screened onto the support plate 205, so that the support plate 205 will use vibration and tilt angle to promote the aggregates to roll onto the coarse screen plate 101, and then the coarse screen plate 101 will use vibration and tilt angle to promote the aggregates to move in the direction close to the inclined plate 103, and intercept aggregates with larger apertures than its own in the process of movement, and at the same time, aggregates with smaller apertures than the coarse screen plate 101 will pass through the coarse screen plate 101 and fall onto the fine screen plate 102. When the screen 313 is unfolded, the aggregates that pass through the coarse screen plate 101 will fall onto the screen 313. When the aggregates fall onto the fine screen plate 102, the fine screen plate 102 will use vibration and tilt angle to push the aggregates that pass through the coarse screen plate 101. Aggregates passing through the coarse screen plate 101 or the screen mesh 313 move toward the direction close to the inclined plate 103, and in the process of movement, intercept aggregates with larger screening apertures than the fine screen plate 102, and make aggregates with smaller apertures than the fine screen plate 102 fall onto the tray 105, so that the tray 105 supports the finest aggregate screened out by the fine screen plate 102 with the support of the fine screen plate 102, and discharges the finest aggregate for collection by the staff under the action of vibration and tilt angle, while the aggregates intercepted by the coarse screen plate 101 and the fine screen plate 102 move to contact with the inclined plate 103, and move toward the inner side of the discharge bucket 106 with the vibration under the action of the tilt angle of the inclined plate 103, and pass through the discharge bucket 106 to be discharged to the outside for collection by the workers.

[0092] As a preferred embodiment of the present invention, the execution unit includes:

[0093] The electric rod 303 is fixed to the inner side of the housing 1 and is located above the coarse screen plate 101;

[0094] An L rod 304, one end of which is fixed to the telescopic end of the electric rod 303;

[0095] The herringbone rod 306 is fixed to the other end of the L rod 304 and moves through the coarse screen plate 101;

[0096] The pull plate 307 is fixed to one end of the herringbone rod 306 away from the L rod 304 .

[0097] Specifically, a support sleeve 3 is fixed to the inner side of the outer shell 1, and the support sleeve 3 is mounted on the outer side of the electric rod 303 and fixedly connected to the fixed end of the electric rod 303. The fixed rod 301 is fixed to the inner side of the outer shell 1 and is located on the side of the support column 2 away from the support sleeve 3. A through groove 302 is opened inside the support sleeve 3, and the through groove 302 is located on the outer side of the L rod 304. The L rod 304 penetrates the support sleeve 3 through the through groove 302. The support sleeve 3 can provide stable support for the electric rod 303, and the electric rod 303 can provide support for the L rod 304, so that the L rod 304 can stably support the herringbone rod 306. The herringbone rod 306 can provide support for the pull plate 307, so that the pull plate 307 can support the end of the air pipe 4 and the screen 313 away from the winding rod 312.

[0098] The screening parts include:

[0099] There are two rack plates 308, and the two rack plates 308 are fixed on the outer side of the housing 1;

[0100] The rotating rod 309 penetrates through the frame plate 308 and is fixedly installed;

[0101] A second spring 310, one end of which is fixedly connected to the frame plate 308 and is sleeved on the outer side of the rotating rod 309;

[0102] There are two rotating disks 311, which are rotatably mounted on the outer side of the rotating rod 309 and fixedly connected to the other end of the second spring 310;

[0103] The screening parts are rolled up between the two rotating disks 311 to adjust the screening level after being unfolded.

[0104] Specifically, screening parts include:

[0105] A winding rod 312, fixedly connected to the two rotating disks 311;

[0106] The screen 313 has one end fixed to the outside of the winding rod 312 and is rolled up on the outside of the winding rod 312;

[0107] The other end of the screen 313 moves through the housing 1 and is located between the coarse screen plate 101 and the fine screen plate 102;

[0108] The frame plate 308 can stably support the rotating rod 309 under the support of the housing 1, and the rotating rod 309 can provide rotation support for the rotating disk 311 and can provide support for one end of the second spring 310, and the rotating disk 311 can provide support for the other end of the second spring 310, and the rotating disk 311 can stably support the winding rod 312, and the winding rod 312 can provide a winding space for the screen 313, and can stably support the end of the screen 313 away from the herringbone rod 306;

[0109] A guide groove 305 is provided through the interior of the coarse screen plate 101, and the guide groove 305 is located on the outside of the herringbone rod 306. A U-plate 315 is fixed to a side of the pull plate 307 close to the herringbone rod 306, and the U-plate 315 bypasses the end of the coarse screen plate 101 away from the inclined plate 103 and is located above the support plate 205. A guide ring 314 is fixed to the end of the U-plate 315 away from the pull plate 307, and the guide ring 314 is movably mounted on the outside of the fixed rod 301. The fixed rod 301 can provide support for the guide ring 314, so that the guide ring 314 can support the pull plate 307 through the U-plate 315, and the fixed rod 301 can provide a moving guide for the U-plate 315 through the guide ring 314, and the guide groove 305 can provide a moving space for the herringbone rod 306, and the guide groove 305 is smaller than the screening aperture of the coarse screen plate 101, and the screen 313 and the winding rod 312 have an inclined angle.

[0110] In actual application of this embodiment, the staff can control the extension of the electric rod 303 under the support of the support sleeve 3 according to the actual needs, so that the electric rod 303 uses the telescopic end to push the L rod 304 through the through slot 302 and the shell 1 to move away from the fixed end of the electric rod 303. At the same time, the L rod 304 will drive the herringbone rod 306 to move along the guide slot 305 under the action of external force, so that the herringbone rod 306 pulls the pull plate 307 to move together under the action of external force, so that the pull plate 307 pulls one end of the screen 313 wound on the outside of the winding rod 312 under the action of external force, so that the screen 313 pulls the winding rod 312 and the rotating disk 311 to rotate clockwise on the outside of the rotating rod 309 under the action of external force, and at the same time, the rotating disk 311 will pull one end of the second spring 310 under the action of the rotating power, so that The second spring 310 is pulled and stored with the support of the frame plate 308 and the action of the rotating power, so that the rolled screen 313 is unfolded between the coarse screen plate 101 and the fine screen plate 102 as the electric rod 303 is extended, and the aggregate passing through the coarse screen plate 101 will fall onto the screen 313 under the action of gravity, so that the screen 313 uses vibration and tilt angle to promote the movement of the aggregate falling on the screen 313. During the movement, the aggregate smaller than the screening aperture of the screen 313 will pass through the screen 313 and fall onto the fine screen plate 102, while the aggregate larger than the screening aperture of the screen 313 and smaller than the screening aperture of the coarse screen plate 101 will be intercepted by the screen 313, and moved along the screen 313 to be discharged to the outside for collection by workers, so that the screen 313 can form a three-stage screening with the coarse screen plate 101 and the fine screen plate 102;

[0111] When the electric rod 303 contracts, it will pull the herringbone rod 306 towards the fixed end of the electric rod 303 through the L rod 304 under the support of the support sleeve 3. At the same time, the herringbone rod 306 will drive one end of the unfolded screen 313 to move towards the winding rod 312 through the pull plate 307 under the action of external force. At this time, the tension on the second spring 310 will disappear, and then the rebound force will be used to push the turntable 311 to rotate counterclockwise under the support of the rotating rod 309 under the support of the frame plate 308, so that the turntable 311 drives the winding rod 312 to rotate together, so that the winding rod 312 uses the rotational power to wind up and wrap the screen 313.

[0112] As a preferred embodiment of the present invention, the blowing part includes an air jet component and an air guide component, the air guide component penetrates the air jet component and is interconnected, the air guide component is connected to the actuator, and the air jet component includes:

[0113] The air pipe 4 is fixed on a side of the pull plate 307 close to the fine sieve plate 102;

[0114] There are multiple nozzles 401, and the multiple nozzles 401 penetrate the air pipe 4 and are fixedly connected at positions close to the fine screen plate 102 and the coarse screen plate 101;

[0115] The flange pipe 403 is fixed on the fine screen plate 102 through a fixing member;

[0116] One end of the wind hood 402 is fixedly connected to the flange pipe 403, and the other end is fixedly connected to the air pipe 4.

[0117] Specifically, the trachea 4 can provide a circulation channel and a guiding function for the gas, and can stably support the nozzle 401. The nozzle 401 can provide a discharge channel for the gas in the trachea 4. The fine screen plate 102 can provide a stable support for the flange pipe 403 through the fixing components. The flange pipe 403 can provide a channel for the gas to enter the wind hood 402. The wind hood 402 is elastic and can be deformed under the action of external force, and can provide a channel for the gas to enter the trachea 4. When the herringbone rod 306 pushes the pull plate 307 to move, the pull plate 307 will pull the trachea 4 to move together under the action of external force, so that the trachea 4 pulls one end of the wind hood 402, so that the wind hood 402 can be pulled and bent and deformed under the support of the flange pipe 403, thereby preventing the wind hood 402 from affecting the movement of the trachea 4.

[0118] The air guide includes:

[0119] The branch pipe 5 passes through the side of the air pipe 4 away from the fine sieve plate 102 and is fixedly installed;

[0120] The flat nozzle 501 is fixed to one end of the branch pipe 5 close to the fine screen plate 102 and extends into the wind cover 402;

[0121] The movable groove 506 is provided on the inner side of the herringbone rod 306, passes through the side of the herringbone rod 306 close to the housing 1, and is communicated with the branch pipe 5;

[0122] The side blowing component is located inside the branch pipe 5 , passes through the pusher, and is connected to the pull plate 307 .

[0123] Specifically, the air pipe 4 can provide stable support for the branch pipe 5, and the branch pipe 5 can provide support for the flat nozzle tube 501. The flat nozzle tube 501 can fit with the inner side of the top wall of the wind hood 402, and can receive the gas entering the wind hood 402 from the flange tube 403, intercept part of the gas on the inner side of the flat nozzle tube 501, and pass through the flat nozzle tube 501 into the inner side of the branch pipe 5. The herringbone rod 306 can provide an opening space for the movable groove 506, and the movable groove 506 can provide a moving space and a guiding function for the fourth spring 505 and the guide sleeve 507.

[0124] Side Blowing Parts Include:

[0125] There are multiple elastic ropes 511, and the multiple elastic ropes 511 are symmetrically fixed on the sealing disk 502 away from the fourth spring 505;

[0126] The air hole 512 is opened through the interior of the sealing disk 502;

[0127] The plug 504 is embedded in the inner side of the air hole 512 and is in contact with the sealing disk 502 away from the fourth spring 505;

[0128] The elastic cord 511 is fixedly connected to the plug 504;

[0129] The air nozzle 510 penetrates the L-rod 304 and is fixed thereto, and is communicated with the branch pipe 5 and the movable groove 506 .

[0130] In actual application of this embodiment, the sealing disk 502 can provide a stable support for the elastic rope 511 and can provide an opening space for the air hole 512. The air hole 512 can provide a circulation channel for gas and can provide a fitting space for the plug 504. The plug 504 and the sealing disk 502 are made of rubber material. The sealing disk 502 fits the inside of the branch pipe 5 to play a sealing role, and the plug 504 fits the sealing disk 502 on the inner side of the air hole 512 to play a sealing role. The connecting tube 503 can provide a circulation channel for air and can provide a moving space for the plug 504. The elastic rope 511 has a certain elasticity and can be deformed under the action of external force. It will rebound after the external force disappears. The wind nozzle 510 can provide a discharge channel and a guiding role for the gas entering the branch pipe 5 and the movable groove 506. When the air pipe 4 moves away from the winding rod 312 as the screen 313 is unfolded, it will push the wind cover 402 to bend. The sieve 313 is deformed, and cooperates with the herringbone rod 306 and the L rod 304 to drive the branch pipe 5 to move together. At the same time, the L rod 304 will drive the air nozzle 510 to move together. When the screen 313 is unfolded, the air nozzle 510 will pass through the through slot 302 and move to the top of the bucket 106. When the pipeline for conveying high-pressure gas is connected to the flange pipe 403, the high-pressure gas will pass through the flange pipe 403 and enter the inner side of the wind hood 402, and along the wind hood 402, a part of the gas will be captured by the flat nozzle tube 501. The sealing disc 502 and the plug 504 are pushed by air pressure on the inner side of the branch pipe 5, so that the sealing disc 502 moves along the branch pipe 5 in a direction away from the flat nozzle barrel 501. Under the action of external force, the sealing disc 502 and the plug 504 drive the connecting pipe 503, the plug 504 and the elastic rope 511 to move together and use the sealing disc 502 to push the fourth spring 505 to move along the branch pipe 5 and the movable groove 506.

[0131] When the fourth spring 505 moves to the limit, the air pressure will push the plug 504 under the resistance of the fourth spring 505 and the sealing disk 502, so that the plug 504 pulls one end of the elastic rope 511 under the action of external force, so that the elastic rope 511 is stretched by the plug 504 under the support of the sealing disk 502, and at the same time, the plug 504 will move out of the current air hole 512 to the inner side of the connecting tube 503, thereby opening the channel of the air hole 512, allowing the gas to pass through the air hole 512 and the inner side channel of the connecting tube 503, and flow into the inner side of the movable groove 506 along the branch pipe 5, and enter the inner side of the air nozzle 510 along the movable groove 506, and finally pass through the air nozzle 510, and blow to the inner side of the bucket 106 under the guidance of the air nozzle 510, and then use the blown gas to push the larger aggregate blocked on the inner side of the bucket 106.

[0132] In another preferred embodiment of the present invention, the blocking member comprises:

[0133] The T-rod 404 is fixed to the outside of the air pipe 4 and is located in the direction of the frame plate 308 away from the rotating disk 311;

[0134] The connecting plate 405 is movably mounted on the outer side of the T-bar 404;

[0135] The rack rod 408 is fixed at both ends of the connecting plate 405;

[0136] The cover 409 , which has a plurality of covers, is fixed on the inner side of the support rod 408 and fits with the end of the nozzle 401 away from the air pipe 4 .

[0137] The push piece includes:

[0138] The third spring 406 is mounted on the outside of the T rod 404 and is located between the connecting plate 405 and the trachea 4;

[0139] The elliptical plate 407 has one end fixedly connected to one end of the connecting plate 405 and the other end fixedly connected to the frame rod 408 and is located above the trachea 4;

[0140] There are two sealing discs 502, which are movably arranged on the inner side of the branch pipe 5 and fit with the inner wall of the branch pipe 5;

[0141] The connecting pipe 503 is fixedly connected to the sealing disk 502 and is located between the two sealing disks 502;

[0142] The push part is arranged on the inner side of the movable groove 506 , fixedly connected to the sealing disk 502 , and located on the outer side of the herringbone rod 306 .

[0143] Specifically, the air pipe 4 can provide support for the T-rod 404, the T-rod 404 can provide movement guidance and support for the connecting plate 405, the connecting plate 405 can provide stable support for the elliptical plate 407, the elliptical plate 407 and the connecting plate 405 can cooperate to provide stable support for the frame rod 408, the cover 409 fits with one end of the nozzle 401 to seal the nozzle 401, prevents aggregate passing through the coarse screen plate 101 from falling to the inside of the nozzle 401, and provides protection for the nozzle 401, the T-rod 404 can provide support for the third spring 406, the third spring 406 has a certain elasticity, can be deformed under the action of external force, and will rebound after the external force disappears, and the elliptical plate 407 has a certain curvature.

[0144] The sliding parts include:

[0145] A fourth spring 505, one end of which is fixedly connected to the sealing disk 502 close to the herringbone rod 306;

[0146] The guide sleeve 507 is sleeved on the outer side of the herringbone rod 306 and extends to the inner side of the movable groove 506 and is fixedly connected to the other end of the fourth spring 505;

[0147] A connecting plate 508 is fixed on the outer side of the guide sleeve 507;

[0148] The arc push block 509 is fixed to one end of the connecting plate 508 away from the guide sleeve 507 and is located above the elliptical plate 407 .

[0149] In the actual application of this embodiment, the fourth spring 505 has a certain elasticity and can be deformed under the action of external force. The herringbone rod 306 and the movable groove 506 can provide a moving guide for the guide sleeve 507. The fourth spring 505 can provide support for the guide sleeve 507, and the guide sleeve 507 can provide support for the connecting plate 508. The connecting plate 508 can firmly support the arc push block 509. The arc push block 509 has a certain curvature and can use its own curvature and the interaction of the elliptical plate 407 to push the elliptical plate 407 to move in the direction away from the frame plate 308 under the downward external force. The staff can adjust the arc push block 509 according to the actual situation. If necessary, before adjusting the screening level, the pipeline for conveying high-pressure gas is connected to the flange pipe 403 by using a fixing component, so that the high-pressure gas passes through the flange pipe 403 and enters the inner side of the wind hood 402, and enters the inner side of the air pipe 4 and the branch pipe 5 along the wind hood 402, so that the high-pressure gas pushes the fourth spring 505 along the movable groove 506 and the branch pipe 5 to move toward the guide sleeve 507 through the sealing plate 502, and then the fourth spring 505 pushes the guide sleeve 507 along the movable groove 506 to move toward the pull plate 307, so that the guide sleeve 507 drives the arc push block 5 through the connecting plate 508 under the action of external force. 09 moves downward, so that the arc push block 509 uses its own curvature to contact the elliptical plate 407 under the action of external force, and uses the curvature of the elliptical plate 407 and the arc push block 509 to cooperate with the external force of the arc push block 509 moving downward, so that the arc push block 509 pushes the elliptical plate 407 to move in the direction away from the frame plate 308, and then the elliptical plate 407 pushes the connecting plate 405 to move along the T rod 404 in the direction away from the frame plate 308 under the action of external force. At the same time, the connecting plate 405 squeezes the third spring 406, so that the third spring 406 is squeezed and contracted and stored energy under the resistance of the air pipe 4 and the guidance of the T rod 404, and When the connecting plate 405 and the elliptical plate 407 drive the frame rod 408 to move together, the frame rod 408 drives the cover 409 fixed inside thereof to move, and then the cover 409 can be separated from the nozzle 401, and the passage of the nozzle 401 is opened. At this time, the gas entering the air pipe 4 will pass through the nozzle 401 and be discharged onto the coarse screen plate 101 and the fine screen plate 102, and when the screen 313 is unfolded to adjust the screening level, the gas discharged from the nozzle 401 is used to blow away the aggregate stuck in the screening aperture of the coarse screen plate 101 and the fine screen plate 102, so as to prevent the coarse screen plate 101 and the fine screen plate 102 from being stuck and affecting the screening work;

[0150] When there is no need to deal with the stuck aggregate, the staff can stop the supply of high-pressure gas and separate the pipeline for conveying high-pressure gas from the flange pipe 403, thereby releasing the push on the sealing disk 502, the fourth spring 505 and the plug 504, so that the elastic rope 511 uses the rebound force to pull the plug 504 to move and reset to the inside of the air hole 512, and the thrust continuously applied to the arc push block 509 will disappear, so that the third spring 406 uses the rebound force under the support of the air pipe 4 to push the connecting plate 405 along the T rod 404 to move away from the air pipe 4, and then the connecting plate 405 drives the elliptical plate 407 to move towards the direction close to the frame plate 308 under the action of external force, and at the same time the elliptical plate 407 and the connecting plate 4 05 will drive the sealing cover 409 to move to the end of the nozzle 401 away from the air pipe 4 and fit it through the support rod 408 under the action of external force. At the same time, the elliptical plate 407 will use its own curvature and the curvature of the arc push block 509 under the action of the rebound force of the third spring 406 to push the arc push block 509 to move upward, so that the arc push block 509 pushes the guide sleeve 507 to move upward along the movable groove 506 through the connecting plate 508 under the action of external force, so that the guide sleeve 507 pushes the fourth spring 505 upward along the movable groove 506 under the action of external force, and then the fourth spring 505 moves along the inner side of the movable groove 506 and the branch pipe 5 toward the direction close to the flat nozzle tube 501 and pushes the sealing disk 502 to move and reset along the branch pipe 5.

[0151] In another preferred embodiment of the present invention, a method for screening aggregates for preparing UHPC premix comprises:

[0152] The vibration motor 201 is started to generate vibration and transmit the vibration to the housing 1, and the housing 1 transmits the vibration force to the coarse screen plate 101, the fine screen plate 102 and the level adjustment part;

[0153] According to the need, the electric rod 303 provided in the actuator in the level adjustment part is controlled to extend so as to push the screen 313 in the screening part in the screening receiving part to expand, so that the screen 313 is expanded between the coarse screen plate 101 and the fine screen plate 102, thereby increasing the number of screening levels;

[0154] According to the need, one end of the flange pipe 403 in the jet part provided in the jet part is connected to the pipeline for conveying high-pressure gas, so that the high-pressure gas enters the flange pipe 403 and pushes the pusher provided in the protection part along the jet part, so that the pusher pushes the blocking member provided in the protection part away from the jet part;

[0155] Then, the high-pressure gas in the flange pipe 403 in the jet component provided in the spraying part will pass through the jet component and be sprayed toward the fine screen plate 102 and the coarse screen plate 101, and move together with the expansion of the screen mesh 313 in the screening part in the receiving and screening component provided in the actuator in the level adjustment part, and then the sprayed gas will be used to push the aggregate stuck on the fine screen plate 102 and the coarse screen plate 101 to move during the movement;

[0156] The aggregate to be screened is injected into the inner side of the housing 1 and falls onto the coarse screen plate 101, so that the coarse screen plate 101 uses vibration to make part of the aggregate pass through the coarse screen plate 101 and intercept the other part of the aggregate;

[0157] Afterwards, the aggregates passing through the coarse screen plate 101 will fall onto the screen 313 deployed in the screen collecting member, and the screen 313 will use vibration to screen the aggregates again and intercept the aggregates with larger apertures than the screen 313. The aggregates passing through the screen 313 will fall onto the fine screen plate 102.

[0158] Finally, the fine screen plate 102 will use vibration to screen out the corresponding aggregates and intercept aggregates with larger pore sizes than itself.

[0159] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An aggregate screening device for preparing a UHPC premix, comprising a housing (1) and a vibration motor (201) arranged inside the housing (1), a coarse screen plate (101) being fixed inside the housing (1), a fine screen plate (102) being fixed inside the housing (1), and the fine screen plate (102) being located below the coarse screen plate (101), characterized in that: Also includes: A level adjustment portion, arranged on the housing (1) and located between the coarse screen plate (101) and the fine screen plate (102), for adjusting the number of screening levels; a blowing portion, arranged between the fine sieve plate (102) and the coarse sieve plate (101), and connected to the level adjustment portion, so as to blow the coarse sieve plate (101) and the fine sieve plate (102) during level adjustment; A protection part is arranged through the blowing part, is located in the level adjustment part, and is above the blowing part to close and protect or open the blowing part; The level adjustment part includes an actuator and a screening component, the actuator is connected to the screening component, the screening component includes a screening part, and the screening part is connected to the actuator; The protection part comprises a blocking piece and a push piece, the blocking piece is movably connected to the blowing part to protect and block the blowing part, and the push piece is connected to the blowing part and the actuator to push the blocking piece to open when blowing the coarse screen plate (101) and the fine screen plate (102) under the guidance of the actuator; The blowing part includes an air-injecting member and an air-guiding member, wherein the air-guiding member penetrates the air-injecting member and is interconnected, and the air-guiding member is connected to the actuator; The air guide member comprises a side-blowing member, which is located on the inner side of the branch pipe (5) and passes through the push member; The pusher comprises a push part, which is arranged on the inner side of the movable groove (506), fixedly connected to the sealing disk (502), and located on the outer side of the herringbone rod (306); The executive parts include: An electric rod (303) is fixed on the inner side of the housing (1) and is located above the coarse screen plate (101); An L rod (304), one end of which is fixed to the telescopic end of the electric rod (303); A herringbone rod (306) is fixed to the other end of the L rod (304) and moves through the coarse screen plate (101); A pull plate (307) is fixed to an end of the herringbone rod (306) away from the L rod (304); The screening element comprises: There are two frame plates (308), and the two frame plates (308) are fixed on the outside of the housing (1); A rotating rod (309) passes through the frame plate (308) and is fixedly installed; A second spring (310) has one end fixedly connected to the frame plate (308) and is sleeved on the outside of the rotating rod (309); There are two rotating disks (311), the two rotating disks (311) are rotatably mounted on the outside of the rotating rod (309) and are fixedly connected to the other end of the second spring (310); The jetting element comprises: The air pipe (4) is fixed to a side of the pull plate (307) close to the fine sieve plate (102); There are multiple nozzles (401), and the multiple nozzles (401) penetrate the air pipe (4) and are fixedly connected at positions close to the fine sieve plate (102) and the coarse sieve plate (101); The flange pipe (403) is fixed on the fine screen plate (102) via a fixing member; An air hood (402) having one end fixedly connected to the flange pipe (403) and the other end fixedly connected to the air pipe (4); The air guide comprises: A branch pipe (5) passes through the air pipe (4) and is fixedly installed on a side away from the fine sieve plate (102); A flat nozzle cylinder (501) is fixed to one end of the branch pipe (5) close to the fine screen plate (102) and extends into the wind cover (402); The movable groove (506) is formed on the inner side of the herringbone rod (306), penetrates a side of the herringbone rod (306) close to the housing (1), and is communicated with the branch pipe (5); The side blowing part is connected to the pulling plate (307); The blocking member comprises: A T-bar (404) is fixed on the outside of the air pipe (4) and is located in a direction of the frame plate (308) away from the rotating disk (311); A connecting plate (405) is movably mounted on the outer side of the T-bar (404); A rack rod (408) is fixed at both ends of the connecting plate (405); A plurality of sealing covers (409) are fixed to the inner side of the support rod (408) and are in contact with an end of the nozzle (401) away from the air pipe (4); The pusher comprises: A third spring (406) is sleeved on the outside of the T-bar (404) and is located between the connecting plate (405) and the trachea (4); An elliptical plate (407) having one end fixedly connected to one end of the connecting plate (405) and the other end fixedly connected to the frame rod (408), and located above the trachea (4); There are two sealing discs (502), which are movably arranged on the inner side of the branch pipe (5) and fit closely to the inner wall of the branch pipe (5); A connecting pipe (503) fixedly connected to the sealing disks (502) and located between the two sealing disks (502); The push part comprises: A fourth spring (505), one end of which is fixedly connected to a sealing disk (502) close to the herringbone rod (306); A guide sleeve (507) is sleeved on the outside of the herringbone rod (306), extends to the inside of the movable groove (506), and is fixedly connected to the other end of the fourth spring (505); A connecting plate (508) is fixed on the outer side of the guide sleeve (507); The arc push block (509) is fixed to one end of the connecting plate (508) away from the guide sleeve (507) and is located above the elliptical plate (407); The side blowing parts include: There are multiple elastic ropes (511), and the multiple elastic ropes (511) are symmetrically fixed on the sealing disk (502) away from the fourth spring (505); An air hole (512) is formed through the interior of the sealing disk (502); The plug (504) is embedded in the inner side of the air hole and is in contact with the sealing disk (502) away from the fourth spring (505); The elastic rope (511) is fixedly connected to the plug (504); The air nozzle (510) passes through the L-rod (304) and is fixedly arranged, and is communicated with the branch pipe (5) and the movable groove (506).

2. A method for screening aggregates for preparing UHPC premix, characterized in that: Applied to the aggregate screening device for preparing UHPC premix as claimed in claim 1, the method comprises: Starting the vibration motor (201) to generate vibration, and transmitting the vibration to the housing (1), and the housing (1) then transmits the vibration force to the coarse screen plate (101), the fine screen plate (102) and the level adjustment part; According to the need, the electric rod (303) provided in the actuator of the grade adjustment part is controlled to extend so as to push the screen (313) in the screening part of the screening receiving part to unfold, so that the screen (313) is unfolded between the coarse screen plate (101) and the fine screen plate (102), thereby increasing the number of screening stages; One end of a flange pipe (403) in a jetting member arranged in the jetting portion is connected to a pipeline for conveying high-pressure gas as required, so that the high-pressure gas enters the flange pipe (403) and pushes a pusher arranged in the protection portion along the jetting portion, so that the pusher pushes a blocking member arranged in the protection portion to be removed from the jetting member; Subsequently, the high-pressure gas in the flange pipe (403) in the jet component provided in the jet section is ejected toward the fine screen plate (102) and the coarse screen plate (101) through the jet component, and moves along with the expansion of the screen mesh (313) in the screening part in the screening receiving component provided in the actuator in the grading section, and the ejected gas is used to push the aggregate stuck on the fine screen plate (102) and the coarse screen plate (101) to move during the movement; Aggregates to be screened are injected into the inner side of the housing (1) and fall onto the coarse screen plate (101), so that the coarse screen plate (101) vibrates to allow part of the aggregates to pass through the coarse screen plate (101) and intercept another part of the aggregates; Then, the aggregates passing through the coarse screen plate (101) will fall onto the screen (313) deployed in the screen collecting member, and the screen (313) will be vibrated to screen the aggregates again and intercept the aggregates with a larger aperture than the screen (313), and the aggregates passing through the screen (313) will fall onto the fine screen plate (102); Finally, the fine screen plate (102) will use vibration to screen out the corresponding aggregates and intercept aggregates with larger pore sizes than itself.

Images