A fine aggregate sand equivalent washing device

Abstract

The utility model provides a fine aggregate sand equivalent flushing device, which relates to the technical field of aggregate testing instruments. The utility model comprises a shell, a driving motor is fixedly installed in the shell, a driving gear is fixedly surrounded by a rotating shaft of the driving motor, a pump body is also fixedly installed on the shell, the pump body comprises a pump outlet pipe and a pump inlet pipe, the pump outlet pipe is rotatably connected with a flushing pipe, a driven gear is also fixedly surrounded outside the flushing pipe, the driven gear is meshed with the driving gear, a flushing head is also installed at one end of the flushing pipe away from the pump outlet pipe, a first nozzle and a second nozzle are arranged at the bottom of the flushing head, the flushing pipe is driven by the motor driving gear to rotate, and the flushing liquid is sprayed from the nozzle through the pump body, so that the soil particles and impurities deposited at the bottom follow the rotation of the flushing pipe to flow, thereby enhancing the flushing effect, replacing manual operation with a mechanical structure, reducing errors in the experimental process, and improving the accuracy of the sand equivalent value test result.

Description

Technical Field

[0001] The utility model relates to the technical field of aggregate testing instruments, in particular to a fine aggregate sand equivalent washing device. Background Art

[0002] Fine aggregate is one of the most commonly used road construction materials, which mainly includes natural sand, artificial sand, stone chips, etc. Sand equivalent value is one of the key performance indicators of fine aggregate, which is directly related to the adhesion and cohesion ability of fine aggregate itself with other cementitious materials such as cement or asphalt. It is mainly evaluated by measuring the content of clay or impurities contained in various fine aggregates to assess the cleanliness of aggregates.

[0003] The newly published "Highway Engineering Aggregate Test Code" JTG3432-2024 provides a test method and instruments for testing the sand equivalent of fine aggregate. When flushing, the liquid storage tank and the flushing pipe are connected through a rubber hose, and then the liquid storage tank is placed at a high position to form a liquid level difference of at least 1m with the flushing pipe. The atmospheric pressure is used to make the flushing liquid flow out, and the start and stop of the flushing is controlled by the opening and closing of the clamp. This leads to the following problems in the test method: 1. The operator needs to climb to place the liquid storage tank, which is not conducive to the operation of the personnel, but also poses a safety hazard and easily causes liquid spillage; 2. The flushing flow is unstable. As the liquid level in the liquid storage tank decreases, the flushing flow will gradually decrease, affecting the flushing effect; 3. Each time it is used, the air in the rubber tube needs to be sucked out in advance through the human mouth or instruments such as ear wash bulbs, and the operation is relatively complicated; 4. Frequent use of clamps to clamp the rubber tube can easily cause the rubber tube to break, affecting the test operation.

[0004] Chinese utility model CN219093043U discloses a fine aggregate sand equivalent test flushing device, which includes a liquid storage tank and a flushing pipeline that can cooperate with the liquid storage tank, one end of the flushing pipeline is located outside the liquid storage tank, and the other end extends into the liquid storage tank, and a flushing pump and a control handle are provided on the flushing pipeline for pressurizing and conveying the flushing liquid, and a filter for filtering impurities is provided on the flushing pipeline. The advantages are: providing sufficient and stable flushing liquid flow in the whole process, solving the problem that the less flushing liquid in the liquid storage tank, the lower the flow, and the liquid storage tank does not need to be placed in a high place, which is convenient to take and put; on the other hand, the control handle is set between the flushing pipe and the rubber tube, so that the handle can be rotated and the switch can be controlled during flushing, and the filter set on the flushing pipeline can filter impurities through the filter to avoid clogging, solving the problem of insufficient flushing in the prior art and reducing the test error caused by unclean flushing.

[0005] However, in the device disclosed in the above-mentioned document, although it solves some problems in the flushing process, there is still a situation where the flushing tube can rotate at a small angle at the bottom of the test tube, resulting in some soil particles and impurities deposited at the bottom cannot be fully flushed. Under manual operation, there are test errors, which affect the experimental results and cause errors in the sand equivalent value assessment results. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a fine aggregate sand equivalent flushing device, which solves the problem of poor flushing effect in the prior art, replaces manual operation with a mechanical structure, reduces errors in the experimental process, and improves the accuracy of sand equivalent value test results.

[0007] According to an embodiment of the utility model, a fine aggregate sand equivalent flushing device comprises a shell, a driving motor is fixedly installed in the shell, a driving gear is fixedly surrounded on the rotating shaft of the driving motor, a pump body is also fixedly installed on the shell, the pump body comprises a pump outlet pipe and a pump inlet pipe, the pump outlet pipe is rotatably connected to a flushing pipe, a driven gear is fixedly surrounded on the outside of the flushing pipe, the driven gear is meshed with the driving gear, a flushing head is also installed on the end of the flushing pipe away from the pump outlet pipe, a first nozzle is arranged at the bottom of the flushing head, and a second nozzle is also arranged around the first nozzle.

[0008] The technical principle of the utility model is: to address the problem of poor flushing effect in the prior art, a driving gear fixed on the rotating shaft of a driving motor is used to drive a driven gear fixed on the flushing pipe to rotate, so that the flushing pipe can rotate 360° in the test tube, and then the flushing liquid is injected into the first nozzle and the second nozzle through the pump body. The flushing liquid flows out from multiple nozzles, so that the soil particles and impurities deposited at the bottom follow the rotation of the flushing pipe, thereby enhancing the flushing effect.

[0009] Furthermore, the second nozzle is fixed around the outer end surface of the flushing head, and the first nozzle and the second nozzle end surfaces are respectively provided with a first spray hole and a second spray hole.

[0010] Furthermore, anti-blocking filters are fixedly connected to the surfaces of the first nozzle and the second nozzle.

[0011] Furthermore, the first nozzle and the second nozzle are hollow cylinders, and are provided with external threads near the end surfaces. The anti-blocking filter is fixedly connected with a locking ring, and the locking ring is provided with an internal thread that is screwed together with the external thread.

[0012] Furthermore, the diameter of the pump outlet pipe is smaller than the diameter of the flushing pipe, and a sealing ring with the same diameter as the flushing pipe is provided between the pump outlet pipe and the flushing pipe, and a sealing connector is fixedly connected between the liquid outlet side of the pump body and the liquid inlet side of the flushing pipe, and the sealing connector is provided with a cylindrical inner tube, and the inner tube is matched with the pump outlet pipe, the sealing ring and the flushing pipe surface clearance.

[0013] Furthermore, the middle section of the flushing pipe is also provided with an anti-deviation component, and the anti-deviation component includes an anti-deviation ring, and a circular hole for the flushing pipe to pass through is provided in the middle of the anti-deviation ring.

[0014] Furthermore, the anti-deflection ring is made of elastic material, the anti-deflection ring has an interference fit with the test tube, and the anti-deflection ring has a clearance fit with the flushing tube.

[0015] Furthermore, the anti-deflection ring is provided with exhaust holes penetrating through the two end surfaces.

[0016] Furthermore, it also includes a support frame, which includes a base, a column is vertically fixed on the base, a fastening mechanism is arranged on the column, and the fastening mechanism and the shell are fixedly connected by a cross bar.

[0017] Furthermore, the fastening mechanism includes a sliding block fixed to the crossbar, the sliding block is slidably arranged on the column, and a tightening bolt that can be threadedly pressed against the column is also arranged on the sliding block.

[0018] Compared with the prior art, the utility model has the following beneficial effects: by using the driving gear fixed on the rotating shaft of the driving motor to drive the driven gear fixed on the flushing pipe to rotate, the flushing pipe can rotate 360 ​​degrees in the test tube, and then the flushing liquid is injected into the first nozzle and the second nozzle through the pump body, and the flushing liquid flows out from multiple nozzles, so that the soil particles and impurities deposited at the bottom follow the rotation of the flushing pipe, thereby enhancing the flushing effect. The problem of poor flushing effect in the prior art is solved, and the mechanical structure replaces manual operation, which reduces the error in the experimental process and improves the accuracy of the sand equivalent value test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0020] Figure 2 It is an enlarged schematic diagram of the driving structure of an embodiment of the utility model.

[0021] Figure 3 It is an enlarged schematic diagram of the flushing head structure of an embodiment of the utility model.

[0022] Figure 4 This is a schematic diagram of the structure of a flushing head according to an embodiment of the utility model.

[0023] Figure 5 This is a schematic diagram of the anti-blocking filter structure of an embodiment of the utility model.

[0024] Figure 6 The figure is a schematic diagram of the rotational connection relationship structure of an embodiment of the utility model.

[0025] Figure 7 It is a schematic diagram of the fastening mechanism structure of an embodiment of the utility model.

[0026] In the above drawings: 1. shell; 2. test tube; 3. flushing tube; 4. flushing head; 41. first nozzle; 42. second nozzle; 43. first spray hole; 44. second spray hole; 45. anti-blocking filter; 46. locking ring; 51. drive motor; 52. drive gear; 53. driven gear; 6. pump body; 61. pump inlet pipe; 62. pump outlet pipe; 7. sealing ring; 8. anti-deflection ring; 81. exhaust hole; 9. support frame; 91. clamp; 92. fastening mechanism; 921. tightening bolt; 922. sliding block; 923. threaded hole; 93. column; 94. base; 95. cross bar; 10. sealing connector. DETAILED DESCRIPTION

[0027] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0028] like Figure 1 and Figure 2 As shown, an embodiment of the utility model proposes a fine aggregate sand equivalent flushing device, which includes a shell 1, a driving motor 51 is fixedly installed on the inner wall of the shell 1, the driving motor 51 is provided with a base for fixing, a driving gear 52 is fixedly installed around the rotating shaft of the driving motor 51, and a pump body 6 is also fixedly installed on the other side of the shell 1. The pump body 6 includes a pump outlet pipe 62 and a pump inlet pipe 61. The pump inlet pipe 61 is arranged above the shell 1, and the pump outlet pipe 62 is arranged below the shell 1. The shell 1 is provided with holes for the pump inlet pipe 61 and the pump outlet pipe 62 to pass through.

[0029] like Figure 2As shown, the pump outlet pipe 62 of the pump body 6 is also rotatably connected to the flushing pipe 3. The diameter of the pump outlet pipe 62 is smaller than that of the flushing pipe 3, and a sealing ring 7 with the same diameter as the flushing pipe 3 is provided between the pump outlet pipe 62 and the flushing pipe 3. The material of the sealing ring 7 is preferably rubber, and the sealing ring 7 can play a role of sealing and buffering. A sealing connector 10 is also fixedly connected between the liquid outlet side of the pump body 6 and the liquid inlet side of the flushing pipe 3. The sealing connector 10 is preferably a cylinder, and a cylindrical inner cylinder is provided inside. The inner cylinder is matched with the surface clearance of the pump outlet pipe 62, the sealing ring 7 and the flushing pipe 3. During the flushing process, the sealing connector 10 can seal the flushing liquid and limit the position of the sealing ring 7 to prevent the sealing ring 7 from shifting.

[0030] like Figure 2 As shown, the flushing tube 3 is also fixedly surrounded by a driven gear 53 near the liquid inlet side. The driven gear 53 and the driving gear 52 are meshed with each other. The radius of the driven gear 53 is larger than that of the driving gear 52, which can achieve a deceleration effect and prevent the motor from rotating too fast and driving the flushing tube 3 to rotate quickly, thereby affecting the flushing effect.

[0031] like Figure 3 and Figure 4 As shown, a flushing head 4 is also installed at the end of the flushing pipe 3 away from the pump outlet pipe 62, and a first nozzle 41 is arranged at the bottom end of the flushing head 4, and a second nozzle 42 is arranged around the first nozzle 41. According to another embodiment of the utility model, the flushing head 4 is a truncated cone structure, and a plurality of second nozzles 42 are arranged and fixed around the inclined end face of the flushing head 4, and the end faces of the first nozzle 41 and the second nozzle 42 are respectively provided with a first spray hole 43 and a second spray hole 44.

[0032] Preferably, Figure 1 and Figure 7 As shown, the flushing device also includes a support frame 9, which includes a base 94, on which a column 93 is vertically fixed, and a fastening mechanism 92 is provided on the column 93. The fastening mechanism 92 and the housing 1 are fixedly connected via a cross bar 95. The fastening mechanism 92 includes a sliding block 922 fixed to the cross bar 95, and the sliding block 922 is longitudinally provided with a mounting hole for the column 93 to pass through, so that the sliding block 922 can be slidably set on the column 93. The sliding block 922 is also provided with a threaded hole 923 that passes through the end face to the column 93 on an outer end face that is perpendicular to the column 93 and away from the cross bar 95. The sliding block 922 is also provided with a tightening bolt 921 that can be threaded against the column 93, and the threaded hole 923 and the tightening bolt 921 can be screwed together. The column 93 is also fixedly connected with a clamp 91 via the fastening mechanism 92 and the cross bar 95 for fixing the test tube 2.

[0033] The detailed working process of this embodiment is as follows: put the processed fine aggregate into the test tube 2, clamp the test tube 2 with the clamp 91, slide the sliding block 922 connected to the shell 1 longitudinally on the column 93, adjust the position of the flushing device, and make the flushing tube 3 extend into the bottom of the test tube 2. When the first nozzle 41 is close to the bottom, turn and tighten the bolt 922 so that the bolt head is tightly against the column 93 to fix the position of the flushing tube 3, and then connect the pump inlet pipe 61 to the flushing liquid container, turn on the pump body 6 to allow the flushing liquid to enter the flushing tube 3 and flow out from the first nozzle 41 and the second nozzle 42, turn on the drive motor 51 to make the drive gear 52 drive the driven gear 53 to rotate, so that the flushing tube 3 also rotates, and after the flushing liquid in the test tube 2 reaches the 380mm scale, steadily take out the flushing tube 3 and the anti-deflection ring 8. In this embodiment, the driven gear 52 fixed on the rotating shaft of the driving motor 51 drives the driven gear 53 fixed on the flushing tube 3 to rotate, so that the flushing tube 3 can rotate 360 ​​degrees in the test tube 2, and then the flushing liquid is injected into the first nozzle 41 and the second nozzle 42 through the pump body 6. The flushing liquid flows out from multiple nozzles, so that the soil particles and impurities deposited at the bottom follow the rotation of the flushing tube 3, thereby enhancing the flushing effect. The problem of poor flushing effect in the prior art is solved, and the mechanical structure replaces the manual operation, which reduces the error in the experimental process and improves the accuracy of the sand equivalent value test results.

[0034] like Figure 3 and Figure 5 As shown, according to another embodiment of the utility model, an anti-blocking filter screen 45 is fixedly connected to the surface of the first nozzle 41 and the second nozzle 42 to prevent fine aggregate gravel from entering the flushing head 4 and clogging the spray hole during flushing. The filter hole diameter of the anti-blocking filter screen 45 is 0.075 mm, and the connection method can be selected by snap-on, welding or tightening. Preferably, the first nozzle 41 and the second nozzle 42 are configured as hollow cylinders, and external threads are provided near the end faces. The anti-blocking filter screen 45 is fixedly connected to a locking ring 46, and the locking ring 46 is provided with an internal thread that is tightened with the external thread. When in use, the locking ring 46 can be screwed into the first nozzle 41 and the second nozzle 42, and can be screwed out for cleaning after use.

[0035] Based on the above further improvements, the anti-blocking filter 45 is added to prevent fine aggregate gravel from entering the flushing head 4 and clogging the spray hole during flushing, and the threaded structure makes the installation and disassembly of the anti-blocking filter 45 more convenient. The anti-blocking filter 45 can be flushed to facilitate the next use.

[0036] like Figure 2 and Figure 6As shown, according to another embodiment of the utility model, the middle section of the flushing tube 3 is also provided with an anti-deviation component, and the anti-deviation component includes an anti-deviation ring 8. A circular hole for the flushing tube 3 to pass through is provided in the middle of the anti-deviation ring 8. Preferably, the anti-deviation ring 8 is made of elastic material, preferably rubber. The outer diameter of the anti-deviation ring 8 is slightly larger than the inner diameter of the test tube 2, and has an interference fit with the test tube 2 to ensure that the anti-deviation ring 8 can be stuck in the test tube 2 and is not easy to move. The inner diameter of the anti-deviation ring 8 is slightly larger than the outer diameter of the flushing tube 3, and has a clearance fit with the flushing tube 3, so that the flushing tube 3 can rotate freely in the ring. For ease of disassembly and assembly, part of the structure can be reserved outside the test tube when in use. Preferably, the anti-deviation ring 8 is also provided with an exhaust hole 81 running through the two end faces, so that the gas in the flushing tube 3 can be discharged smoothly during the flushing process, and will not cause overpressure in the tube to affect the flushing.

[0037] Based on the above further improvements, an anti-deflection ring 8 is added to prevent the flushing tube 3 from shifting during rotation, thereby affecting the flushing effect. By selecting an elastic rubber material and performing an interference fit with the test tube 2, the positioning of the anti-deflection ring 8 is facilitated, and an exhaust hole 81 is provided so that the gas in the flushing tube 3 can be discharged smoothly during the flushing process, and no overpressure in the tube will be caused to affect the flushing.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A fine aggregate sand equivalent washing device, characterized in that: It includes a shell, a driving motor is fixedly installed in the shell, a driving gear is fixedly wrapped around the rotating shaft of the driving motor, a pump body is also fixedly installed on the shell, the pump body includes a pump outlet pipe and a pump inlet pipe, the pump outlet pipe is rotatably connected to a flushing pipe, a driven gear is fixedly wrapped around the outside of the flushing pipe, the driven gear is meshed with the driving gear, a flushing head is also installed on the end of the flushing pipe away from the pump outlet pipe, a first nozzle is arranged at the bottom of the flushing head, and a second nozzle is also arranged around the first nozzle.

2. A fine aggregate sand equivalent washing device as claimed in claim 1, characterized in that: The second nozzle is fixed around the outer end surface of the flushing head, and the end surfaces of the first nozzle and the second nozzle are respectively provided with a first spray hole and a second spray hole.

3. A fine aggregate sand equivalent washing device as claimed in claim 2, characterized in that: Anti-blocking filters are fixedly connected to the surfaces of the first nozzle and the second nozzle.

4. A fine aggregate sand equivalent washing device as claimed in claim 3, characterized in that: The first nozzle and the second nozzle are hollow cylinders and are provided with external threads near the end faces. The anti-blocking filter is fixedly connected with a locking ring, and the locking ring is provided with an internal thread that is screwed together with the external thread.

5. A fine aggregate sand equivalent washing device as claimed in claim 1, characterized in that: The diameter of the pump outlet pipe is smaller than that of the flushing pipe, and a sealing ring with the same diameter as the flushing pipe is arranged between the pump outlet pipe and the flushing pipe. A sealing connector is also fixedly connected between the liquid outlet side of the pump body and the liquid inlet side of the flushing pipe. The sealing connector is provided with a cylindrical inner tube, and the inner tube is gap-matched with the pump outlet pipe, the sealing ring and the flushing pipe surface.

6. A fine aggregate sand equivalent washing device as claimed in claim 1, characterized in that: The middle section of the flushing pipe is also provided with an anti-deviation component, and the anti-deviation component includes an anti-deviation ring. The middle part of the anti-deviation ring is provided with a circular hole for the flushing pipe to pass through.

7. A fine aggregate sand equivalent washing device as claimed in claim 6, characterized in that: The anti-deflection ring is made of elastic material, has interference fit with the test tube, and has clearance fit with the flushing tube.

8. A fine aggregate sand equivalent washing device as claimed in any one of claims 6 or 7, characterized in that: The anti-deflection ring is provided with exhaust holes penetrating through two end surfaces.

9. A fine aggregate sand equivalent washing device as claimed in claim 1, characterized in that: It also includes a support frame, which includes a base, a column is vertically fixed on the base, a fastening mechanism is arranged on the column, and the fastening mechanism and the shell are fixedly connected by a cross bar.

10. A fine aggregate sand equivalent washing device as claimed in claim 9, characterized in that: The fastening mechanism comprises a sliding block fixed to the crossbar, the sliding block is slidably arranged on the column, and a tightening bolt capable of threading against the column is also arranged on the sliding block.

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