Equipment for accurately measuring fluidity of cement mortar

Abstract

The utility model relates to cement mortar fluidity accurate measuring equipment which comprises a base, a jumping table, a supporting frame, a first lead screw, a second lead screw, a connecting pipe, a hanging rod, a sliding rod, a first sliding seat, a second sliding seat, a laser indicator, a laser range finder and a receiver, the jumping table is arranged on the upper surface of the base, and the supporting frame is vertically arranged above the jumping table. The first lead screw and the second lead screw are horizontally, symmetrically and rotationally arranged on the upper portion in the supporting frame, and the sliding rod is horizontally arranged above the lead screws. The first sliding seat and the second sliding seat are arranged on the first lead screw and the second lead screw in a sleeving mode respectively and are in threaded connection, and the sliding seats are arranged on the sliding rod in a sleeving mode. And laser indicators are fixed on the lower end surfaces of the first sliding seat and the second sliding seat, and light emitting ports of the laser indicators face downwards. And the laser range finder is arranged in the first sliding seat. The measuring equipment disclosed by the utility model can effectively reduce measuring errors and more truly reflect the fluidity of the cement mortar.

Description

Technical Field

[0001] The utility model relates to the technical field of fluidity testing, in particular to a device for accurately measuring the fluidity of cement mortar. Background Art

[0002] The fluidity of cement mortar is one of the important indicators to measure its physical properties and construction performance. It reflects the fluidity of the mortar under the action of self-gravity or external force, and is usually expressed by the average diameter of the expansion of the cement mortar on the vibrating table, also known as the spread or flow distance. The fluidity of cement mortar is the key to studying the plasticity, fluidity, stability, crack resistance and other properties of the mortar, and provides a basis for the proportioning and construction of cement mortar. At present, the method for testing the fluidity of cement mortar (specific reference: "Test Method for Fluidity of Cement Mortar" GBT2419-2005) is as follows: Pour the cement mortar to be tested into a truncated cone mold placed on the vibrating table, then scrape off the cement mortar that is higher than the truncated cone mold. After scraping, gently lift the truncated cone mold vertically upward. Then start the vibrator to vibrate for a certain period of time. After completion, use a ruler to measure the diameter of the cement mortar spread on the vibrating table, which is the fluidity of the cement mortar. Since this method is tested by the tester using an ordinary ruler and the edge of the cement mortar is determined by visual observation, the measurement error is large, which affects the authenticity of the reflection of the properties of the cement mortar. Content of the Utility Model

[0003] Aiming at the problem of large error in the current method for testing the fluidity of cement mortar, the utility model discloses a device for accurately measuring the fluidity of cement mortar, including: a base, a vibrating table, a support frame, a first lead screw, a second lead screw, a connecting pipe, a suspension rod, a sliding rod, a first sliding seat, a second sliding seat, a laser indicator, a laser rangefinder and a receiver. Among them: the vibrating table is arranged on the upper surface of the base, the support frame is vertically arranged above the vibrating table and spans the diameter direction of the vibrating table. The first lead screw and the second lead screw are horizontally, symmetrically and rotatably arranged in the upper part of the support frame, and the adjacent ends of the first lead screw and the second lead screw are respectively rotatably inserted into the two ports of the connecting pipe. The connecting pipe is suspended below the sliding rod through the suspension rod. The sliding rod is horizontally arranged above the lead screw and is fixedly connected to the support frame at both ends. The first sliding seat and the second sliding seat are respectively sleeved on the first lead screw and the second lead screw and are threadedly connected, and both the first sliding seat and the second sliding seat are slidably sleeved on the sliding rod. Laser indicators are fixedly arranged on the lower end surfaces of the first sliding seat and the second sliding seat, and their light emission ports are vertically downward. The laser rangefinder is arranged in the first sliding seat, and the receiver corresponding to the laser rangefinder is arranged in the second sliding seat to measure the straight-line distance between the light beams emitted by the two.

[0004] Further, the left end of the first lead screw is rotatably connected to the left column of the support frame, and the right end is rotatably inserted into the left port of the connecting pipe. The right end of the second lead screw is rotatably connected to the right column of the support frame, and the left end is rotatably inserted into the right port of the connecting pipe.

[0005] Further, mounting holes are provided on the side walls of the first sliding seat and the second sliding seat, and the laser rangefinder and the receiver are respectively arranged in the mounting holes of the corresponding sliding seats.

[0006] Further, the left end of the first lead screw extends outside the left column of the support frame, and a handwheel is connected to this left end. The right end of the second lead screw extends outside the right column of the support frame, and a handwheel is connected to this right end.

[0007] Further, bearings are fixed on both the first lead screw and the second lead screw. They are located in the mounting holes on the corresponding columns, and the outer rings of the bearings are fixedly connected to the mounting holes. The lead screw passes through the inner rings of the bearings and the two are in interference fit.

[0008] Further, a positioning post is provided at the center of the upper surface of the base, and a groove is provided at the center of the lower surface of the jumping table. The positioning post is located in this groove and the jumping table can rotate around the positioning post.

[0009] Further, a vibrator is further provided in the positioning post and at the center of its upper surface to vibrate the jumping table.

[0010] Further, the two lower ends of the support frame are respectively connected to the horizontal sliding mechanisms on both sides of the base, so that the support frame can slide back and forth.

[0011] Further, the horizontal sliding mechanism includes a support plate, a slide rail, a support rod, and a sliding sleeve. Among them: the two support plates are symmetrically fixed on the side walls on both sides of the base, the two slide rails are symmetrically and parallelly arranged on both sides of the base, and the front end of the slide rail is fixed to the support plate and the rear end is connected to the outer end of the support rod, and the inner end of this support rod is fixed to the side wall of the base. The two sliding sleeves are slidably sleeved on the two slide rails, and the two lower ends of the support frame are respectively fixedly connected to the sliding sleeves of the two slide rails, so that the support frame can slide back and forth to avoid affecting the lifting of the truncated cone mold on the jumping table during testing.

[0012] Further, the laser indicator, the laser rangefinder, and the receiver are all connected to the controller, and the controller is connected to the display screen to control the opening and closing of the laser indicator, the laser rangefinder, and the receiver, and display the test results on the display screen.

[0013] Compared with the prior art, the present utility model has the following beneficial effects:

[0014] The measuring device of the present utility model forms a split and independently movable first lead screw and a second lead screw by using a suspended connecting pipe above the vibrating table, so that the first sliding seat and the second sliding seat provided with laser indicators can be moved separately. Furthermore, the two side edges of the cement mortar can be more accurately positioned by using the light beams vertically emitted downward by the laser indicators. At the same time, the laser rangefinders and receivers respectively arranged on the first sliding seat and the second sliding seat can quickly obtain the straight-line distance between the two light beams by measuring the distance between the two sliding seats. Meanwhile, by controlling the pitch of the lead screw, the movement of the sliding seat can be made more precise, so that the fluidity of the cement mortar on the vibrating table can be accurately obtained, effectively overcoming the problem of large errors in the current test method for the fluidity of cement mortar. In addition, the support frame can also carry its test unit to move back and forth. Therefore, when placing the truncated cone mold on the vibrating table, filling the cement mortar into it, and lifting the truncated cone mold, etc., the support frame and its test unit can be temporarily moved out from above the truncated cone mold to avoid affecting the above operations and improve the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the device for accurately measuring the fluidity of cement mortar in the following embodiments.

[0016] Figure 2 It is a schematic structural diagram of the first sliding seat in the following embodiments.

[0017] Figure 3 It is a schematic structural diagram of the second sliding seat in the following embodiments.

[0018] Figure 4 It is a schematic structural diagram of the first lead screw in the following embodiments.

[0019] Figure 5 It is a schematic structural diagram of the base in the following embodiments.

[0020] Figure 6 It is a top view of the device for accurately measuring the fluidity of cement mortar in the following embodiments.

[0021] The labels in the above drawings represent: 1 - base, 2 - vibrating table, 3 - support frame, 4 - first lead screw, 5 - second lead screw, 6 - connecting pipe, 7 - suspension rod, 8 - sliding rod, 9 - first sliding seat, 10 - second sliding seat, 11 - laser indicator, 12 - laser rangefinder, 13 - receiver, 14 - mounting hole, 15 - truncated cone mold, 16 - hand wheel, 17 - limiting ring, 18 - positioning column, 19 - vibrator, 20 - support plate, 21 - slide rail, 22 - support rod, 23 - sliding sleeve, 24 - display screen. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present utility model. Unless otherwise specified, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.

[0023] For the convenience of description, if the words "upper", "lower", "left", and "right" appear in the present utility model, they only indicate the same directions as the upper, lower, left, and right of the accompanying drawings themselves, and do not limit the structure. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to needs to have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation to the present utility model. The present utility model will be further described below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0024] Referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 ,an apparatus for accurately measuring the fluidity of cement mortar is exemplified, which includes: a base 1, a vibrating table 2, a support frame 3, a first lead screw 4, a second lead screw 5, a connecting pipe 6, a suspension rod 7, a slide bar 8, a first sliding seat 9, a second sliding seat 10, a laser indicator 11, a laser rangefinder 12, and a receiver 13. Among them: for the horizontally arranged base 1, it is mainly used for carrying components such as the vibrating table 2 and the support frame 3, and increasing the overall stability of the measuring apparatus. The vibrating table 2 is in the shape of a circular plate, which is arranged on the upper surface of the base 1, and the diameter of the vibrating table 2 is larger than that of the base 1. The vibrating table 2 can adopt an existing vibrating table, which is mainly used for testing the fluidity of cement mortar on its upper surface.

[0025] For the support frame 3, it is formed by a left vertical column, a right vertical column arranged vertically, and a horizontal connecting rod horizontally arranged to connect the upper ends of the left vertical column and the right vertical column. The support frame 3 is vertically arranged above the vibrating table 2 and spans the diameter direction of the vibrating table 2. That is, the left vertical column and the right vertical column are symmetrically arranged on both sides of the vibrating table 2, and the lower ends of the left vertical column and the right vertical column are respectively fixedly connected to the side wall of the base 1, and the horizontal connecting rod is located directly above the diameter of the vibrating table 2.

[0026] For the lead screw, the first lead screw 4 and the second lead screw 5 are horizontally, symmetrically and rotatably arranged at the upper part in the support frame 3 and are located directly above the diameter of the jumping table 2. Among them: the left end of the first lead screw 4 passes through the through hole on the left column of the support frame 3 and extends outside the column, and the right end is rotatably inserted into the left port of the connecting pipe 6. The right end of the second lead screw 5 passes through the through hole on the right column and extends outside the column, and the left end is rotatably inserted into the right port of the connecting pipe 6. The connecting pipe 6 is fixedly connected to the lower end of the suspension rod 7, and the upper end of the suspension rod 7 is connected to the sliding rod 8, so as to suspend the connecting pipe 6 below the sliding rod 8. The sliding rod 8 is horizontally arranged above the lead screw and both ends of the sliding rod 8 are fixedly connected to the support frame 3, forming a split and independently movable first lead screw 4 and second lead screw 5.

[0027] For the sliding seat, the first sliding seat 9 and the second sliding seat 10 are respectively sleeved on the first lead screw 4 and the second lead screw 5 through their threaded holes and are in threaded connection. At the same time, the first sliding seat 9 and the second sliding seat 10 are both sleeved on the sliding rod 8 through sliding holes and are in sliding connection. Thus, when the lead screw is rotated, the sliding seat is driven to slide along the lead screw and the sliding rod 8, and further the distance between the first sliding seat 9 and the second sliding seat 10 is changed, which is convenient for testing the fluidity of the cement mortar on the jumping table 2. Laser indicators 11 are fixedly installed on the lower end surfaces of the first sliding seat 9 and the second sliding seat 10, and their light emitting ports are vertically downward. Mounting holes 14 are provided on the side walls of the first sliding seat 9 and the second sliding seat 10. The laser rangefinder 12 is installed in the mounting hole 14 of the first sliding seat 9, and the corresponding receiver 13 is installed in the mounting hole 14 of the second sliding seat 10, so as to test the straight-line distance between the light beams emitted by the laser rangefinder 12 of the first sliding seat 9 and the second sliding seat 10. The laser indicators 11, the laser rangefinder 12 and the receiver 13 can all adopt existing products, and these devices are connected through a controlled switch power supply.

[0028] During the test, according to the corresponding operating procedures, a conical frustum mold 15 is used to form a spread cement mortar on the jumping table 2, and then the laser indicators 11, the laser rangefinder 12 and the receiver 13 are started. The first lead screw 4 and the second lead screw 5 are rotated to move the first sliding seat 9 and the second sliding seat 10 until the emitted light beams respectively coincide with the left and right edges of the spread cement mortar. At this time, the distance between the two light beams obtained by the laser rangefinder 12 is the fluidity of the cement mortar, which is expressed in mm. This test method in this embodiment can accurately obtain the fluidity of the cement mortar on the jumping table 2 and effectively overcome the problem of large errors in the current test method for the fluidity of the cement mortar. In addition, by controlling the pitch on the lead screw, the movement of the sliding seat can be made more precise, so that the light beam can be more accurately aligned with the edge of the cement mortar.

[0029] In another embodiment, referring to Figure 1 , handwheels 16 are connected to the left end of the first lead screw 4 and the right end of the second lead screw 5 of the fluidity precise measurement device for the cement mortar in the above example, so as to drive the rotation of the lead screw more conveniently and quickly.

[0030] In another embodiment, referring to Figure 1 and Figure 4 , two spaced-apart limit rings 16 are sleeved on each of the first lead screw 4 and the second lead screw 5 of the fluidity precise measurement device for the cement mortar in the above example, and the limit rings 16 are fixedly connected to the lead screw. The left column is located between the two limit rings 17 of the first lead screw 4, and the right column is located between the two limit rings 16 of the second lead screw 5. Bearings can also be used instead of the two spaced-apart limit rings 16. The bearings are located in the mounting holes on the columns, and the outer rings of the bearings are fixedly connected to the mounting holes. The lead screw passes through the inner rings of the bearings and the two are interference-fitted, so as to limit the left and right movement of the lead screw while not affecting the rotation of the lead screw.

[0031] In another embodiment, referring to Figure 1 and Figure 5 , the upper surface center of the base 1 of the fluidity precise measurement device for the cement mortar in the above example has a circular raised positioning post 18, and the lower surface center of the jumping table 2 has a groove. The positioning post 18 is located in the groove, and the jumping table 2 can rotate horizontally around the positioning post 18, so as to rotate the jumping table 2 to test the widths of the spread cement mortar in different directions and improve the accuracy of the test results.

[0032] In another embodiment, referring to Figure 1 and Figure 5 , the fluidity precise measurement device for the cement mortar in the above example further includes a vibrator 19 provided in the positioning post 18 and located at the center of its upper surface, so as to vibrate the jumping table 2 to spread the cement mortar. The vibrator 19 can adopt the vibration device currently used for testing the fluidity of cement mortar.

[0033] In another embodiment, the above-mentioned laser indicator 11, laser rangefinder 12, and receiver 13 are all connected to the controller, and the controller is connected to the display screen 24. Control buttons for the laser indicator 11, laser rangefinder 12, receiver 13, etc. are provided on the display screen 24, so that the operator can control the opening and closing of these devices, etc., and display the test results on the display screen 24. A data storage unit can also be set up to store the test results.

[0034] In another embodiment, referring to Figure 1, the two lower ends of the support frame 3 of the fluidity precise measurement device of the cement mortar in the above example are respectively connected to the horizontal sliding mechanisms on both sides of the base 1, so that the support frame 3 can slide back and forth. Specifically, refer to Figure 6 , the horizontal sliding mechanism includes a support plate 20, a slide rail 21, a support rod 22 and a sliding sleeve 23. Among them: the two support plates 20 are symmetrically fixed on the left and right side walls of the base 1. The two slide rails 21 are symmetrically and parallelly arranged on both sides of the base 1, and the front end of the slide rail 21 is fixed to the support plate 20, and the rear end is connected to the outer end of the support rod 22. The inner end of the support rod 22 is fixed to the side wall of the base 1. The slide rail 21 is made of a square tube, a round tube or the like. A sliding sleeve 23 is sleeved on each of the two slide rails 21, and the sliding sleeve 23 can slide back and forth along the slide rail 21. The lower ends of the left and right columns of the support frame 3 are respectively fixedly connected to the sliding sleeves 23 of the two slide rails 21, so that the support frame 3 can slide back and forth. When placing the truncated cone mold 15 on the jumping table 2, pouring cement mortar into it, and lifting the truncated cone mold 15, etc., the support frame 3 and its testing unit (such as the lead screw, the sliding seat, the laser indicator, etc.) can be temporarily moved out from above the truncated cone mold 15 to avoid affecting the above operations and improve the testing efficiency. In addition, a support column can be connected to the right end of the slide rail 21 to support the rear end of the slide rail 21 on the test bench.

[0035] Finally, it should be noted that any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. Although the specific implementation manners of the present invention are described above in conjunction with the accompanying drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that based on the technical solution of the present invention, various modifications or deformations that can be made by those skilled in the art without creative labor are still within the protection scope of the present invention.

Claims

1. An apparatus for accurately measuring the fluidity of cement mortar, characterized in that, Comprising: A vibrating table, which is arranged on the upper surface of the base; A support frame, which is vertically arranged above the vibrating table and spans the diameter direction of the vibrating table; A first lead screw and a second lead screw, which are horizontally, symmetrically and rotatably arranged in the upper part of the support frame, and the adjacent end parts of the first lead screw and the second lead screw are respectively rotatably inserted into the two end ports of a connecting pipe, and the connecting pipe is suspended below the sliding rod by a suspension rod; A sliding rod, which is horizontally arranged above the lead screw and is fixedly connected to the support frame at both ends thereof; A first sliding seat and a second sliding seat, which are respectively sleeved on the first lead screw and the second lead screw and are threadedly connected, and both the first sliding seat and the second sliding seat are slidably sleeved on the sliding rod; Laser indicators, which are fixedly arranged on the lower end surfaces of the first sliding seat and the second sliding seat respectively, and the light emitting ports thereof are vertically downward; A laser rangefinder and a receiver, the laser rangefinder is arranged in the first sliding seat, and the receiver corresponding to the laser rangefinder is arranged in the second sliding seat.

2. The fluidity precise measurement device for cement mortar according to claim 1, wherein The left end of the first lead screw is rotatably connected to the left column of the support frame, and the right end is rotatably inserted into the left port of the connecting pipe; the right end of the second lead screw is rotatably connected to the right column of the support frame, and the left end is rotatably inserted into the right port of the connecting pipe.

3. The fluidity precise measurement device for cement mortar according to claim 1, characterized in that, Mounting holes are formed in the side walls of the first sliding seat and the second sliding seat, and the laser rangefinder and the receiver are respectively arranged in the mounting holes of the corresponding sliding seats.

4. The fluidity precise measurement device for cement mortar according to claim 1, characterized in that The left end of the first lead screw extends outside the left column of the support frame, and a hand wheel is connected to this left end; the right end of the second lead screw extends outside the right column of the support frame, and a hand wheel is connected to this right end.

5. The fluidity precise measurement device for cement mortar according to claim 4, characterized in that Bearings are fixedly arranged on both the first lead screw and the second lead screw, and are located in the mounting holes on the corresponding columns, and the outer rings of the bearings are fixedly connected to the mounting holes, and the lead screw passes through the inner rings of the bearings and the two are interference-fitted.

6. The fluidity precise measurement device for cement mortar according to claim 1, characterized in that, A positioning post is provided at the center of the upper surface of the base, a groove is provided at the center of the lower surface of the vibrating table, and the positioning post is located in the groove and the vibrating table can rotate around the positioning post.

7. The fluidity precise measurement device for cement mortar according to claim 6, characterized in that It further includes a vibrator arranged in the positioning post and at the center of its upper surface.

8. The fluidity precise measurement device for cement mortar according to any one of claims 1-7, characterized in that, The two lower ends of the support frame are respectively connected to the horizontal sliding mechanisms on both sides of the base, so that the support frame can slide back and forth.

9. The fluidity precise measurement device for cement mortar according to claim 8, characterized in that, The horizontal sliding mechanism includes support plates, slide rails, support rods and sliding sleeves; wherein: two of the support plates are symmetrically fixed on the side walls on both sides of the base, two of the slide rails are symmetrically and parallelly arranged on both sides of the base, and the front ends of the slide rails are fixed to the support plates, and the rear ends are connected to the outer ends of the support rods, and the inner ends of the support rods are fixed to the side walls of the base; the two slide rails are both slidably sleeved with the sliding sleeves, and the two lower ends of the support frame are respectively fixedly connected to the sliding sleeves of the two slide rails.

10. The fluidity precise measurement device for cement mortar according to any one of claims 1-7, characterized in that, The laser indicators, the laser rangefinder and the receiver are all connected to a controller, and the controller is connected to a display screen.

Images