Concrete fine aggregate particle detection apparatus

Abstract

The application relates to the field of material screening equipment, in particular to a concrete fine aggregate particle detection equipment which comprises a vibrating seat, a sieve disc and a locking block, one side of the sieve disc away from the vibrating seat is connected with a plug-in ring, one side of the sieve disc towards the vibrating seat is provided with a plug-in groove, the sieve disc is provided with a plurality of sieve discs, the lowermost sieve disc is detachably connected to the vibrating seat, the plug-in groove is used for embedding the plug-in ring of an adjacent sieve disc, the plug-in ring is provided with a plug-in port, the groove wall of the plug-in groove towards the plug-in port is provided with a locking port, one end of the locking block is arranged in the locking port, and the other end of the locking block is used for embedding in the plug-in port. The sieve disc is connected to the vibrating seat, adjacent sieve discs are fixed by using the locking block, the sieve disc is not easy to be separated from the vibrating seat in the vibrating process, the material screening condition in the sieve disc is convenient to observe, and the material screening is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of material screening equipment, in particular to a concrete fine aggregate particle detection equipment. BACKGROUND

[0002] Aggregate is one of the indispensable materials for preparing concrete, accounting for more than 3 / 4 of the total volume of concrete. Generally, the quality of sandstone aggregate largely determines the performance of concrete. In order to ensure that the quality of concrete meets the relevant requirements, laboratory detection work needs to be actively carried out.

[0003] When detecting the particles of concrete fine aggregate, the fine aggregate particles need to be screened first. The vibrating screen machine is a machine used for replacing manual screening and cooperating with the test screen for material particle analysis. Among them, the standard vibrating screen machine is widely used in coal quality testing, geology, metallurgy, chemical industry, scientific research, and cement industry due to its small size, light weight, and beautiful appearance.

[0004] The invention patent with the authorized publication number CN109351601B discloses a percussion type standard vibrating screen machine, which solves the problem that the screen disc is easy to fall off after the vibrating screen machine is started. The machine includes a machine base, a vibrating seat installed on the top of the machine base, a sleeve screen assembly detachably placed on the top surface of the vibrating seat, and a driving motor for driving the vibrating seat to vibrate. The sleeve screen assembly includes at least two stacked screen discs. The top of the vibrating seat is also detachably installed with a protective outer cover. The protective outer cover has a protective inner cavity for placing the sleeve screen assembly. The screen disc is positioned in abutment with the inner wall of the protective inner cavity. The top of the protective outer cover is also provided with a pressing assembly for pressing the sleeve screen assembly on the vibrating disc. The percussion type standard vibrating screen machine is not easy to fall off after starting.

[0005] However, each time the material needs to be added or the screening is completed, the lifting assembly needs to be driven to lift the protective outer cover or separate the protective cover body from the pressing cover. The operation is not convenient, and the sleeve screen assembly is arranged in the protective inner cavity, which is not convenient for observing the material screening condition and is not convenient to use. SUMMARY

[0006] In order to facilitate the screening of materials, the present application provides a concrete fine aggregate particle detection equipment.

[0007] The concrete fine aggregate particle detection equipment provided by the present application adopts the following technical scheme:

[0008] The utility model provides a concrete fine aggregate particle detection equipment, including vibration seat, sieve tray and locking block, the side of sieve tray is connected with the plug -in ring away from vibration seat, the side of sieve tray is equipped with the plug -in groove towards vibration seat, the sieve tray is equipped with a plurality of, the lowermost sieve tray is detachably connected on vibration seat, the plug -in groove is used for the plug -in ring of adjacent sieve tray embeds, the plug -in ring is equipped with the plug -in mouth, the groove wall of the plug -in groove towards the plug -in mouth is equipped with locking mouth, one end of locking block is located in locking mouth, the other end of locking block is used for embedding in the plug -in mouth.

[0009] Through adopting the technical scheme, the sieve tray is connected on the vibration seat, adjacent sieve trays are fixed by using the locking block, so that the sieve tray is not easy to separate from the vibration seat in the process of vibrating, and the material screening condition in the sieve tray is convenient to observe, and the material screening is convenient.

[0010] Preferably, the concrete fine aggregate particle detection equipment further comprises a rotating column, the end of the sieve tray towards the vibration seat is provided with an avoiding slot, the avoiding slot is communicated with the locking mouth, the locking block is slidingly connected to the groove wall of the avoiding slot, the end of the sieve tray away from the vibration seat is provided with a rotating port, the rotating column rotates around its axis in the rotating port, the rotating axis of the rotating column is parallel to the axis of the sieve tray, and the end of the rotating column away from the vibration seat is fixedly connected to one end of the locking block.

[0011] Through adopting the technical scheme, the locking block slides upward in the avoiding slot to the locking mouth, the rotating column rotates to control the rotation of the locking block, and the locking block is embedded in the plug-in port to lock the adjacent sieve trays, so that the operation is simple and convenient, and the material screening is convenient.

[0012] Preferably, the rotating port is communicated with the avoiding slot, the end of the locking block away from the rotating column is provided with a limiting slot, the end of the rotating column away from the locking block is fixedly connected with a limiting block, and the limiting slot is used for embedding the limiting block of the adjacent rotating column.

[0013] Through adopting the technical scheme, the limiting block is embedded in the limiting slot, one rotating column rotates to control the synchronous rotation of multiple locking blocks, so that multiple sieve trays are locked synchronously, the fixing efficiency is improved, and the material screening is convenient.

[0014] Preferably, the concrete fine aggregate particle detection equipment further comprises a driving column, the outer wall of the lowermost sieve tray is provided with a driving port, the outer wall of the rotating column is connected with a lifting block, the driving column slides in the driving port, the end of the driving column towards the axis of the sieve tray is provided with a guide surface, the guide surface is used for abutting the end of the lifting block towards the vibration seat, and the distance from the guide surface to the vibration seat decreases with the approach to the axis of the sieve tray.

[0015] By adopting the technical scheme, the driving column slides in the driving port, the guide surface makes the lifting block slide upward to drive the plurality of rotating columns to slide upward synchronously, the locking block is opposite to the plug-in port, and the rotating column is rotated to lock the adjacent sieve disc by the plug-in block, so that the operation is simple and the fixing efficiency is improved.

[0016] Preferably, the concrete fine aggregate particle detection equipment further comprises a rubber ring, the rubber ring is sleeved on the outer wall of the rotating column, the rubber ring is arranged on the side of the lifting block close to the vibrating seat, one end of the driving column close to the rubber ring is connected with a rubber strip, and the outer wall of the rubber ring is used for abutting against the rubber strip.

[0017] By adopting the technical scheme, the rubber strip abuts against the rubber ring, the driving column slides, the rotating column is driven to rotate by the friction force between the rubber strip and the rubber ring, the adjacent sieve disc is locked by the locking block, the probability that the material is scattered due to the separation of the sieve disc in the vibration process is reduced, the operation is simple, and the material is conveniently screened.

[0018] Preferably, the concrete fine aggregate particle detection equipment further comprises a fixing block and an extension spring, the fixing block is fixedly connected to the upper end of the vibrating seat, one end of the driving column away from the axis of the sieve disc is fixedly connected with a sliding plate, one end of the extension spring is fixedly connected to the fixing block, and the other end of the extension spring is fixedly connected to the sliding plate.

[0019] By adopting the technical scheme, the extension spring facilitates the driving column to extend into the driving port, reduces the probability that the driving column is separated from the sieve disc in the vibration process, improves the stability of the connection between the sieve discs, reduces the probability that the sieve discs are separated, and facilitates the screening of the material.

[0020] Preferably, the upper end of the vibrating seat is provided with a sliding groove, the sliding groove is arranged between the fixing block and the sieve disc, the lower end of the sliding plate is slidably embedded in the sliding groove, and the sliding groove is a dovetail groove.

[0021] By adopting the technical scheme, the lower end of the sliding plate is slidably embedded in the sliding groove, the sliding plate is not easy to be separated from the sliding groove, the sieve disc and the vibrating seat are locked, the probability that the entire sieve disc is separated from the vibrating seat is reduced, and the material is conveniently screened.

[0022] Preferably, the upper end of the vibrating seat is provided with a placing groove, and the lower end of the sieve disc is embedded in the placing groove.

[0023] By adopting the technical scheme, the placing groove facilitates the installation of the sieve disc, and improves the installation efficiency of the sieve disc.

[0024] Preferably, one end of the sieve disc close to the vibrating seat is connected with a plug-in pipe, one end of the sieve disc away from the vibrating seat is connected with a plug-in column, and the plug-in pipe is used for embedding the plug-in column of the adjacent sieve disc.

[0025] By adopting the technical scheme, the insertion column is embedded in the insertion pipe, the positions of the insertion column and the insertion pipe reduce the probability of reverse installation, and the installation efficiency of the screen disc is improved.

[0026] Preferably, an inner wall of the insertion pipe is provided with a positioning groove, and an outer wall of the insertion column is connected with a positioning strip, and the positioning groove is used for slidingly embedding the positioning strip.

[0027] By adopting the technical scheme, the positioning strip is embedded in the positioning groove, the installation position of the screen disc is facilitated to be positioned, the plug-in interface is aligned with the locking port, the subsequent locking is facilitated, and the operation is simple and convenient.

[0028] In summary, the present application has at least one of the following beneficial technical effects:

[0029] 1. The screen disc is connected to the vibrating seat, the adjacent screen discs are fixed by using the locking blocks, the screen disc is not easy to be separated from the vibrating seat in the vibrating process, the material screening condition in the screen disc is convenient to observe, and the material screening is facilitated;

[0030] 2. The rubber strip abuts against the rubber ring, the driving column is driven to rotate by the friction force between the rubber strip and the rubber ring, the adjacent screen discs are locked by the locking blocks, the probability of material spilling caused by the separation of the screen disc in the vibrating process is reduced, the operation is simple and convenient, and the material screening is facilitated;

[0031] 3. The lower end of the sliding plate is slidingly embedded in the sliding groove, the sliding plate is not easy to be separated from the sliding groove, the screen disc and the vibrating seat are locked, the probability of the entire screen disc falling off the vibrating seat is reduced, and the material screening is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a schematic view of the overall structure of a concrete fine aggregate particle detection device.

[0033] Figure 2 is a sectional view of the concrete fine aggregate particle detection device.

[0034] Figure 3 is Figure 2 is an enlarged view of A in FIG. 4.

[0035] Figure 4 is a schematic view of the overall structure of a concrete fine aggregate particle detection device.

[0036] Explanation of reference signs: 1, vibration assembly; 11, processing table; 111, containing cavity; 112, connecting port; 113, through port; 12, driving motor; 13, driving shaft; 14, cam; 15, shaft sleeve; 16, ejector rod; 17, vibration seat; 171, anti-dropping column; 172, placing groove; 173, sliding groove; 18, fixing sleeve; 19, vibration spring; 2, sieve disc; 21, sieve plate; 211, sieve hole; 212, insertion column; 2121, positioning strip; 213, insertion pipe; 2131, positioning groove; 22, fixing ring; 221, insertion ring; 2211, insertion port; 222, insertion groove; 2221, locking port; 223, avoiding groove; 224, fixing groove; 225, rotating port; 226, driving port; 3, cover; 31, covering groove; 4, locking assembly; 41, rotating column; 411, limiting block; 412, lifting block; 42, locking block; 421, limiting groove; 5, driving assembly; 51, driving column; 511, sliding plate; 512, guide surface; 513, rubber strip; 52, fixing block; 53, extension spring; 54, rubber ring. DETAILED DESCRIPTION

[0037] The following will be described in detail with reference to the accompanying drawings. Figures 1-4 The present application is further described in detail.

[0038] The present application discloses a concrete fine aggregate particle detection device. Referring to Figure 1 and Figure 2 The concrete fine aggregate particle detection device comprises a vibration assembly 1, a sieve disc 2, a cover 3, a locking assembly 4 and a driving assembly 5.

[0039] Referring to Figure 2 The vibration assembly 1 comprises a processing table 11, a driving motor 12, a driving shaft 13, a cam 14, a shaft sleeve 15, an ejector rod 16, a vibration seat 17, a fixing sleeve 18 and a vibration spring 19. The processing table 11 is a cuboid, and the processing table 11 is provided with a containing cavity 111. The outer wall of the processing table 11 is provided with a connecting port 112, which penetrates the processing table 11 along the length direction of the processing table 11 and is communicated with the containing cavity 111. The motor shell of the driving motor 12 is fixedly connected to the outer wall of the processing table 11, the motor shaft of the driving motor 12 is coaxially fixedly connected to the driving shaft 13, and the driving shaft 13 is coaxially rotationally connected to the inner wall of the connecting port 112.

[0040] The cam 14 is coaxially fixedly connected to the outer wall of the driving shaft 13. The upper end of the processing table 11 is provided with a through port 113, which is communicated with the containing cavity 111. The shaft sleeve 15 is coaxially fixedly connected to the inner wall of the through port 113. The ejector rod 16 is slidingly connected to the inner wall of the shaft sleeve 15. The sliding direction of the ejector rod 16 is vertical. The lower end of the ejector rod 16 abuts against the outer wall of the cam 14. The upper end of the ejector rod 16 is fixedly connected to the lower end of the vibration seat 17.

[0041] With reference to Figure 2 The fixed sleeve 18 is provided with four, the fixed sleeve 18 is fixedly connected to the four corners of the upper end of the machining table 11, the lower end of the vibration seat 17 is fixedly connected with the anti-drop column 171, the vibration spring 19 is arranged in the fixed sleeve 18, the lower end of the vibration spring 19 is fixedly connected to the upper end of the machining table 11, the vibration spring 19 is sleeved on the outer periphery of the anti-drop column 171, and the upper end of the vibration spring 19 is fixedly connected to the lower end of the vibration seat 17.

[0042] With reference to Figure 2 The sieve disc 2 comprises a sieve plate 21 and a fixed ring 22, the sieve plate 21 is coaxially fixedly connected to the inner wall of the fixed ring 22, the sieve plate 21 is provided with sieve holes 211, the upper end of the fixed ring 22 is coaxially fixedly connected with a plug-in ring 221, the inner diameter of the plug-in ring 221 is equal to the inner diameter of the fixed ring 22, the thickness of the plug-in ring 221 is less than the thickness of the fixed ring 22, the inner wall of the lower end of the fixed ring 22 is coaxially provided with a plug-in groove 222, the sieve disc 2 is provided with three, the plug-in groove 222 is used for embedding the lower plug-in ring 221, the outer wall of the plug-in ring 221 abuts against the groove wall of the plug-in groove 222, the upper end of the vibration seat 17 is provided with a placing groove 172, the lowermost fixed ring 22 is embedded in the placing groove 172, the lowermost sieve plate 21 is without the sieve hole 211, and the diameter of the upper sieve hole 211 is greater than that of the lower sieve hole 211.

[0043] With reference to Figure 2 And Figure 3 One end of the plug-in ring 221 away from the axis of the sieve disc 2 is provided with a plug-in port 2211, the plug-in port 2211 is provided with two, the two plug-in ports 2211 are uniformly and spacedly arranged around the axis of the sieve disc 2, the groove wall of the plug-in groove 222 towards the axis of the sieve disc 2 is provided with a locking port 2221, the locking port 2221 is provided with two, the locking port 2221 is correspondingly arranged with the plug-in port 2211, the lower end of the fixed ring 22 is provided with an avoiding groove 223, the avoiding groove 223 is arranged on the outer periphery of the plug-in groove 222, the avoiding groove 223 is provided with two, the avoiding groove 223 is correspondingly arranged with the locking port 2221, the avoiding groove 223 is communicated with the locking port 2221, the upper end of the fixed ring 22 is provided with a fixed groove 224, the fixed groove 224 is arranged on the outer periphery of the plug-in ring 221, the groove bottom of the fixed groove 224 is provided with a rotating port 225, the axis of the rotating port 225 is vertical, and the rotating port 225 is communicated with the locking port 2221.

[0044] One side of the cover 3 is provided with a covering groove 31, the covering groove 31 is used for embedding the plug-in ring 221 of the uppermost sieve disc 2, the lower end of the cover 3 abuts against the upper end of the fixed ring 22, the lower end of the cover 3 is provided with the avoiding groove 223, the avoiding groove 223 is arranged on the outer periphery of the covering groove 31, the groove wall of the covering groove 31 towards the plug-in port 2211 is provided with the locking port 2221, and the locking port 2221 is communicated with the avoiding groove 223.

[0045] With reference to Figure 3The locking assembly 4 comprises a rotating column 41 and a locking block 42. The rotating column 41 is slidingly connected to the inner wall of the rotating port 225, the diameter of the rotating column 41 is equal to the diameter of the rotating port 225, the upper end of the rotating column 41 is fixedly connected to one end of the locking block 42, the fixed groove 224 is used for embedding the locking block 42, the locking block 42 is slidingly connected to the groove wall of the avoiding groove 223, the locking port 2221 is used for rotating the locking block 42, the locking block 42 can be rotatably embedded in the plug-in port 2211, the upper end of the locking block 42 is provided with a limiting groove 421, the lower end of the rotating column 41 is connected with a limiting block 411, the limiting block 411 is embedded in the limiting groove 421, and the limiting groove 421 is a hexagonal groove.

[0046] With reference to Figure 2 and Figure 3 The upper end of the sieve plate 21 is coaxially fixedly connected with a plug-in column 212, the lower end of the sieve plate 21 is coaxially fixedly connected with a plug-in pipe 213, the inner wall of the plug-in pipe 213 is provided with a positioning groove 2131 extending downwardly through the plug-in pipe 213, the positioning groove 2131 is provided with two, which are uniformly and interval arranged around the axis of the plug-in pipe 213, the outer wall of the plug-in column 212 is fixedly connected with a positioning strip 2121, the positioning strip 2121 is provided with two, which are uniformly and interval arranged around the axis of the plug-in column 212, the plug-in column 212 is slidingly embedded in the plug-in pipe 213, and the positioning strip 2121 is slidingly embedded in the positioning groove 2131, so that the plug-in port 2211 and the locking port 2221 are correspondingly arranged. The groove bottom of the covering groove 31 is coaxially fixedly connected with the plug-in pipe 213.

[0047] With reference to Figure 2 and Figure 3 The driving assembly 5 comprises a driving column 51, a fixed block 52, an elastic spring 53 and a rubber ring 54. The outer wall of the lowermost fixed ring 22 is provided with a driving port 226, the driving port 226 is communicated with the rotating port 225, the axis of the driving port 226 is along the radial direction of the sieve disc 2, the driving port 226 is provided with two, which are uniformly and interval arranged around the axis of the sieve disc 2, the driving assembly 5 is provided with two, which are correspondingly arranged with the driving port 226, and the driving port 226 is used for slidingly embedding the driving column 51.

[0048] The fixed block 52 is fixedly connected to the upper end of the vibrating seat 17, the driving column 51 is connected with the sliding plate 511 at the end away from the axis of the sieve disc 2, one end of the telescopic spring 53 is fixedly connected to the fixed block 52 towards the placing groove 172, the other end of the telescopic spring 53 is fixedly connected to the sliding plate 511, the upper end of the vibrating seat 17 is provided with the sliding groove 173, the sliding groove 173 is arranged between the fixed block 52 and the sieve disc 2, the length direction of the sliding groove 173 is along the radial direction of the sieve disc 2, the lower end of the sliding plate 511 is slidingly embedded in the sliding groove 173, and the sliding groove 173 is a dovetail groove. The bottom of the placing groove 172 is coaxially fixedly connected with the insertion column 212, the insertion column 212 is slidingly embedded in the insertion pipe 213, so that the driving port 226 is arranged in one-to-one correspondence with the sliding groove 173.

[0049] With reference to Figure 2 And Figure 4 The outer wall of the lowermost rotating column 41 is connected with the lifting block 412, the end of the driving column 51 towards the axis of the sieve disc 2 is provided with the guide surface 512, the distance from the guide surface 512 to the vibrating seat 17 decreases with the distance away from the sliding plate 511, the guide surface 512 is used for abutting against the lower end of the lifting block 412, and the lifting block 412 moves upward in the process that the driving column 51 moves towards the axis of the sieve disc 2.

[0050] The rubber ring 54 is sleeved on the outer wall of the rotating column 41, the rubber ring 54 is arranged below the lifting block 412, the end of the driving column 51 towards the rubber ring 54 is connected with the rubber strip 513, and the outer wall of the rubber ring 54 is used for abutting against the rubber strip 513. In the process that the sliding plate 511 slides towards the axis of the sieve disc 2, the lifting block 412 is first lifted through the guide surface 512, so that the locking block 42 reaches the height at which the insertion port 2211 is located, the sliding plate 511 continues to slide towards the axis of the sieve disc 2, the rubber strip 513 abuts against the rubber ring 54, the rotating column 41 rotates, one end of the locking block 42 rotates and extends into the insertion port 2211, and the locking of the sieve discs 2, the locking between the sieve disc 2 and the cover 3 and the locking between the sieve disc 2 and the vibrating seat 17 are simultaneously completed.

[0051] The implementation principle of the concrete fine aggregate particle detection equipment in the embodiment of the application is as follows: the insertion columns 212 of the plurality of sieve discs 2 are embedded in the insertion pipes 213 in alignment, the positioning strips 2121 are embedded in the positioning grooves 2131 in alignment, the insertion rings 221 are embedded in the insertion grooves 222, the locking ports 2221 and the insertion ports 2211 are arranged opposite to each other, the cover 3 is connected to the uppermost sieve disc 2, the lowermost sieve disc 2 is embedded in the placing groove 172, the sliding plate 511 slides in the sliding groove 173, the driving column 51 is embedded in the driving port 226, the sieve disc 2 and the vibrating seat 17 are locked, the rotating column 41 first slides upward and then rotates, the locking block 42 rotates and is embedded in the insertion port 2211, the adjacent sieve discs 2 are locked, and the sieve disc 2 and the cover 3 are locked.

[0052] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A concrete fine aggregate particle testing device, characterized in that: The device includes a vibrating seat (17), a screen (2), and a locking block (42). The screen (2) is connected to a plug ring (221) on the side away from the vibrating seat (17). The screen (2) is provided with a plug groove (222) on the side facing the vibrating seat (17). There are multiple screens (2). The lowest screen (2) is detachably connected to the vibrating seat (17). The plug groove (222) is used for the plug ring (221) of the adjacent screen (2) to be inserted. The plug ring (221) is provided with a plug interface (2211). The groove wall of the plug groove (222) facing the plug interface (2211) is provided with a locking port (2221). One end of the locking block (42) is located in the locking port (2221), and the other end of the locking block (42) is used to be inserted into the plug interface (2211). It also includes a rotating column (41), and the end of the screen plate (2) facing the vibrating seat (17) is provided with a relief groove (223). The relief groove (223) is connected to the locking port (2221). The locking block (42) is slidably connected to the groove wall of the relief groove (223). The end of the screen plate (2) away from the vibrating seat (17) is provided with a rotating port (225). The rotating column (41) rotates around its own axis in the rotating port (225). The rotation axis of the rotating column (41) is parallel to the axis of the screen plate (2). The end of the rotating column (41) away from the vibrating seat (17) is fixedly connected to the locking block (42). The rotating port (225) is connected to the clearance groove (223). The locking block (42) is provided with a limiting groove (421) at one end away from the rotating column (41). A limiting block (411) is fixedly connected to one end of the rotating column (41) away from the locking block (42). The limiting groove (421) is used for the limiting block (411) of the adjacent rotating column (41) to be embedded. It also includes a drive column (51), the outer wall of the lowest screen plate (2) is provided with a drive port (226), the outer wall of the lowest rotating column (41) is connected with a lifting block (412), the drive column (51) slides in the drive port (226), the end of the drive column (51) facing the axis of the screen plate (2) is provided with a guide surface (512), the guide surface (512) is used to abut against the end of the lifting block (412) facing the vibrating seat (17), and the distance from the guide surface (512) to the vibrating seat (17) decreases as it approaches the axis of the screen plate (2); It also includes a rubber ring (54), which is sleeved on the outer wall of the lowest rotating column (41). The rubber ring (54) is located on the side of the lifting block (412) near the vibrating seat (17). A rubber strip (513) is connected to one end of the driving column (51) facing the rubber ring (54). The outer wall of the rubber ring (54) is used to abut against the rubber strip (513). It also includes a fixed block (52) and a telescopic spring (53). The fixed block (52) is fixedly connected to the upper end of the vibrating seat (17). The end of the drive column (51) away from the axis of the screen plate (2) is fixedly connected to a sliding plate (511). One end of the telescopic spring (53) is fixedly connected to the fixed block (52), and the other end of the telescopic spring (53) is fixedly connected to the sliding plate (511).

2. The concrete fine aggregate particle testing equipment according to claim 1, characterized in that: The upper end of the vibrating seat (17) is provided with a sliding groove (173), which is located between the fixed block (52) and the screen plate (2). The lower end of the sliding plate (511) is slidably embedded in the sliding groove (173), which is a dovetail groove.

3. The concrete fine aggregate particle testing equipment according to claim 1, characterized in that: The upper end of the vibrating seat (17) is provided with a placement groove (172), and the lower end of the sieve plate (2) is embedded in the placement groove (172).

4. The concrete fine aggregate particle testing equipment according to claim 1, characterized in that: The end of the sieve disc (2) facing the vibrating seat (17) is connected to a tube (213), and the end of the sieve disc (2) away from the vibrating seat (17) is connected to a post (212). The tube (213) is used for the post (212) of the adjacent sieve disc (2) to be inserted.

5. The concrete fine aggregate particle testing equipment according to claim 4, characterized in that: The inner wall of the insertion tube (213) is provided with a positioning groove (2131), and the outer wall of the insertion post (212) is connected with a positioning strip (2121). The positioning groove (2131) is used for the positioning strip (2121) to slide into the insertion tube.

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