CN117706071B - Cement setting time tester - Google Patents
Cement setting time tester Download PDFInfo
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- CN117706071B CN117706071B CN202410165927.4A CN202410165927A CN117706071B CN 117706071 B CN117706071 B CN 117706071B CN 202410165927 A CN202410165927 A CN 202410165927A CN 117706071 B CN117706071 B CN 117706071B
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- 239000004568 cement Substances 0.000 title claims abstract description 39
- 238000013016 damping Methods 0.000 claims abstract description 34
- 238000009434 installation Methods 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 17
- 230000005484 gravity Effects 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 13
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 230000008878 coupling Effects 0.000 claims description 11
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 239000000523 sample Substances 0.000 abstract description 26
- 238000005259 measurement Methods 0.000 abstract description 19
- 239000011796 hollow space material Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 12
- 241001422033 Thestylus Species 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000011326 mechanical measurement Methods 0.000 description 2
- 238000012800 visualization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Abstract
The invention relates to the technical field of cement setting time measurement, in particular to a cement setting time measuring instrument which comprises a tray, a support column, a mounting rack, a counterweight, a measuring needle, a fixing device and a damping buffer. Wherein the mounting bracket is fixed on the tray through the support column installation, and counter weight and fixing device are all installed on the mounting bracket, and the measuring needle is installed in counter weight one end, and the counter weight installation is fixed with the arch, damping buffer installation fix in the mounting bracket. The mounting frame is a hollow cylinder, a scale groove communicated with the hollow space is formed in the outer surface of the mounting frame, the protrusions penetrate out of the scale, the effect of limiting and marking the height is achieved, and an installation table for installing the damping buffer is arranged in the mounting frame. When the cement initial setting time is measured, the damping buffer is arranged, the impact force of the probe is reduced to the size which can be born by the probe through the damping buffer before the probe collides with the bottom plate, and the problem that the probe is bent due to collision is solved.
Description
Technical Field
The invention relates to the technical field of cement setting time measurement, in particular to a cement setting time measuring instrument.
Background
In the measurement of the setting time of cement, a pressure measurement method is generally used, that is, the depth of penetration of a pressure probe into cement is measured to determine the initial setting time and the final setting time of cement.
However, there are many problems in the prior art, two of which have the greatest influence on the measurement of the coagulation time, namely, the problem that the needle is easy to bottom out during the initial coagulation stage, and thus the needle is bent. Secondly, when the counterweight is released by the free falling body, the suddenly nature of the counterweight cannot be ensured, and because the step is controlled by the hand of the person, the instrument is inevitably vibrated when the knob is rotated, so that the measurement is inaccurate.
There is therefore a need for a cement setting time tester that can solve the above problems.
Disclosure of Invention
The invention aims to provide a cement setting time tester for solving the problems.
The invention is realized by the following technical scheme:
a cement setting time tester comprises a tray, a support column, a mounting rack, a counterweight, a measuring needle, a fixing device and a damping buffer.
Wherein the mounting bracket is fixed on the tray through the support column installation, and counter weight and fixing device are all installed on the mounting bracket, and the measuring needle is installed in counter weight one end, and the counter weight installation is fixed with the arch, damping buffer installation fix in the mounting bracket.
The mounting frame is a hollow cylinder, a scale groove communicated with the hollow space is formed in the outer surface of the mounting frame, the protrusions penetrate out of the scale, the effect of limiting and marking the height is achieved, and an installation table for installing the damping buffer is arranged in the mounting frame.
When the cement initial setting time is measured, the damping buffer is arranged, the impact force of the probe is reduced to the size which can be born by the probe through the damping buffer before the probe collides with the bottom plate, and the problem that the probe is bent due to collision is solved.
Preferably, the fixing device comprises rollers, an electric control switch module and a resistance control module, wherein the number of the rollers is at least two, the two rollers clamp the balance weight, the friction force between the rollers and the balance weight is far greater than the gravity of the balance weight, that is, the friction force between the rollers and the balance weight is more than 20 times of the gravity of the balance weight, the gravity of the balance weight is far greater than the rotation resistance of the rollers, that is, the gravity of the balance weight is more than 20 times of the rotation resistance of the rollers, the resistance control module is fixedly arranged on the rollers of the two rollers to control the resistance in the rotation process of the rollers, and the electric control switch module is in signal connection with the resistance control module to control the rotation and stop of the rollers.
The fixing device comprises a roller, an electric control switch module and a resistance control module, and solves the problem of unavoidable errors when the counterweight is released manually in the test process.
Preferably, the damping buffer comprises an impact pad, a piston rod, a piston disc and an empty cylinder, wherein the impact pad is fixedly arranged at one end of the piston rod, the piston disc is fixedly arranged at the other end of the piston rod, one end of the piston rod, provided with the piston disc, is arranged in the empty cylinder, the empty cylinder is a hollow cylinder with one end open, the piston disc and the empty cylinder are in interference fit, and a plurality of tiny through holes are formed in the piston disc.
The damping buffer comprises an impact pad, a piston rod, a piston disc and an empty cylinder, and the impact force of a counterweight is buffered through gas compression, so that the problem of overlarge volume of a hydraulic buffer with equivalent function is solved while a probe is protected.
Preferably, the resistance control module comprises a coupler and a constant resistance generator, wherein the constant resistance generator is connected with one end of the coupler, the other end of the coupler is fixedly connected with a roller of any roller, and the coupler is fixedly installed with the mounting frame through an installation part in the mounting frame.
Preferably, the constant resistance generator comprises friction wheels, friction clamping plates and a miniature motor, wherein the friction wheels are fixedly connected with one end of the coupler, the friction wheels are positioned between the friction clamping plates, and the miniature motor controls the opening and closing degree of the friction clamping plates so as to control the resistance between the friction wheels.
The constant resistance generator comprises the friction wheel, the friction clamping plate and the miniature motor, wherein the miniature motor and the friction clamping plate apply constant force to the friction wheel, and the constant resistance generator is matched with the electric control switch module, so that the instant dropping of the counterweight can be controlled, and the problem that the measuring needle is possibly bent is solved.
Preferably, the counterweight comprises a cylinder and a convex ring, the maximum radius of the convex ring is 1-3 mm larger than that of the cylinder, the height of the convex ring is 0.5-1 mm, the convex ring is fixedly arranged on the cylinder, and a reducing device for the convex ring to enter and exit is arranged on the mounting frame in an adaptive manner.
The detachable convex ring is arranged on the counterweight, and can be sleeved on the cylinder during initial coagulation test, so that the convex ring can play a role in buffering before the probe touches the bottom, and the bending of the probe is prevented.
The reducing device is specifically a detachable gasket, the detachable gasket is installed and fixed on the mounting frame, a round hole is formed in the middle of the detachable gasket, the radius of the round hole is identical to the radius of the counterweight, the mounting frame is provided with a mounting hole for installing the detachable gasket, and the radius of the mounting hole is larger than the maximum radius of the convex ring.
Preferably, a pressure sensor and a resistance measurement sensor are arranged at the end of the needle head of the measuring needle, and a signal transmitting module is arranged in the measuring needle and transmits signals of the pressure sensor and the resistance measurement sensor to the analysis module.
Since mechanical measurements inevitably produce errors in each measurement, the invention incorporates multiple parameter simultaneous measurements to reduce errors by multiple parameter comparison.
Preferably, an indicator lamp is arranged on the mounting frame and is in signal connection with the pressure sensor, and the indicator lamp is lightened when the measuring needle touches cement.
Because in actual measurement, the test can be carried out by a plurality of different experimenters generally, experimental error can be increased, and particularly when the needle is aligned, the condition that the needle head does not touch the cement surface can often occur, so the visualization of the needle step in the test process is realized by arranging the indicator lamp and the pressure sensor, and the same test precision can be achieved by different operators.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. When the cement initial setting time is measured, the damping buffer is arranged, the impact force of the probe is reduced to the size which can be born by the probe before the probe collides with the bottom plate, so that the problem of bending of the probe due to collision is solved;
2. The damping buffer comprises an impact pad, a piston rod, a piston disc and an empty cylinder, wherein the impact force of a counterweight is buffered through gas compression, so that the problem of overlarge volume of a hydraulic buffer with equivalent function is solved while a measuring needle is protected;
3. the constant resistance generator comprises the friction wheel, the friction clamping plate and the miniature motor, wherein the miniature motor and the friction clamping plate apply constant force to the friction wheel, and the constant resistance generator is matched with the electric control switch module, so that the instant dropping of the counterweight can be controlled, and the problem that the measuring needle is possibly bent is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:
Fig. 1 is a schematic diagram of the front view structure of embodiment 1;
FIG. 2 is a schematic front sectional view of example 1;
FIG. 3 is a schematic side cross-sectional view of example 1;
FIG. 4 is a schematic front sectional view of example 2;
FIG. 5 is a schematic side cross-sectional view of example 2;
FIG. 6 is a schematic side cross-sectional view of example 3;
FIG. 7 is a schematic front sectional view of example 4;
FIG. 8 is a schematic cross-sectional view of the stylus of example 5.
The reference numerals are represented as follows: 1-tray, 2-support column, 3-mounting rack, 4-counterweight, 5-measuring needle, 6-roller, 7-impact pad, 8-piston rod, 9-piston disc, 10-hollow cylinder, 11-coupling, 12-friction wheel, 13-friction clamping plate, 14-mounting table, 15-mounting part, 16-bulge, 17-bulge loop, 18-mounting head, 19-needle, 20-pressure sensor, 21-resistance measuring sensor, 22-signal transmitting module.
Detailed Description
In order that those skilled in the art will better understand the present application, a detailed description of embodiments of the present application will be provided below, with reference to the accompanying drawings, wherein it is apparent that the described embodiments are only some, but not all, embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that if the terms "first," "second," and the like are referred to in the description of the present application and the claims and the above figures, they are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein. Furthermore, if the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, if the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like are referred to, the indicated azimuth or positional relationship is based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
Further, in the present application, the terms "mounted," "configured," "provided," "connected," "sleeved," and the like are to be construed broadly if they relate to. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
Example 1
As shown in fig. 1 to 3, the present embodiment includes.
A cement setting time tester comprises a tray 1, a support column 2, a mounting frame 3, a counterweight 4, a measuring needle 5, a fixing device and a damping buffer.
Wherein the mounting bracket 3 is fixed on the tray 1 through the installation of support column 2, and counter weight 4 and fixing device are all installed on the mounting bracket 3, and measuring needle 5 is installed in counter weight 4 one end, and counter weight 4 installation is fixed with protruding 16, damping buffer install and fix in the mounting bracket 3.
It is understood that the stylus may be replaced by an initial needle, a standard consistency needle, a final needle, which are distinguished by different lengths, thicknesses, materials.
The mounting frame 3 is a hollow cylinder, a scale groove communicated with the hollow inside is formed in the outer surface of the mounting frame 3, the bulge 16 penetrates out of the scale, the effect of limiting and marking the height is achieved, and the mounting table 14 for mounting the damping buffer is arranged in the mounting frame 3.
The invention is provided with the damping buffer, when the cement initial setting time is measured, the impact force of the probe 5 is reduced to the size which can be borne by one probe 5 by the damping buffer before the probe 5 collides with the bottom plate, so that the problem of bending of the probe 5 caused by collision is solved.
In this embodiment, the damping buffer includes an impact pad 7, a piston rod 8, a piston disc 9, and an empty cylinder 10, wherein the impact pad 7 is fixedly installed at one end of the piston rod 8, the piston disc 9 is fixedly installed at the other end of the piston rod 8, one end of the piston rod 8 with the piston disc 9 is installed into the empty cylinder 10, the empty cylinder 10 is a hollow cylinder with one end open, the piston disc 9 and the empty cylinder 10 are in interference fit, and a plurality of tiny through holes are arranged on the piston disc 9.
The damping buffer comprises an impact pad 7, a piston rod 8, a piston disc 9 and an empty cylinder 10, and the impact force of the counterweight 4 is buffered through gas compression, so that the problem of overlarge volume of a hydraulic buffer with equivalent function is solved while the probe 5 is protected.
Example 2
As shown in fig. 4 to 5, the present embodiment includes.
A cement setting time tester comprises a tray 1, a support column 2, a mounting frame 3, a counterweight 4, a measuring needle 5 and a fixing device.
Wherein the mounting bracket 3 is fixed on the tray 1 through the installation of support column 2, and counter weight 4 and fixing device are all installed on the mounting bracket 3, and the measuring needle 5 is installed in counter weight 4 one end, and counter weight 4 installs and is fixed with protruding 16.
The mounting frame 3 is a cylinder with a hollow inside, a scale groove communicated with the hollow inside is formed in the outer surface of the mounting frame 3, the bulge 16 penetrates out of the scale, and meanwhile the effects of limiting and marking the height are achieved.
It can be understood that the protruding outer end is equipped with the instruction arrow, realize the reading with the scale cooperation, among the prior art, the instruction arrow is with protruding usually use threaded connection, very easily produce the screw thread smooth silk in the test process, lead to the degree to appear the deviation, consequently in this embodiment, the instruction arrow is connected for rectangular channel magnetism with protruding outer end, wherein rectangular channel sets up on the arch, the rectangular block sets up on the instruction arrow, this structure has solved the rotatory problem that the instruction arrow probably takes place, all be equipped with the magnet that the magnetic pole is opposite on the contact surface of rectangular channel and rectangular block, the demountable installation of instruction arrow and rectangular channel has been realized.
In this embodiment, the fixing device includes rollers 6, an electric control switch module, and a resistance control module, at least two rollers 6 clamp the counterweight 4, the friction between the rollers 6 and the counterweight 4 is far greater than the gravity of the counterweight 4, that is, the friction between the rollers 6 and the counterweight 4 is more than 20 times of the gravity of the counterweight 4, the gravity of the counterweight 4 is far greater than the rotation resistance of the rollers 6, that is, the gravity of the counterweight 4 is more than 20 times of the rotation resistance of the rollers, the resistance control module is fixedly installed on the rollers of the two rollers 6, the resistance of the rollers in the rotation process is controlled, and the electric control switch module is in signal connection with the resistance control module to control the rotation and stop of the rollers.
The fixing device comprises a roller 6, an electric control switch module and a resistance control module, and solves the problem of unavoidable errors when the counterweight 4 is released manually in the test process.
In this embodiment, the resistance control module includes a coupling 11 and a constant resistance generator, wherein the constant resistance generator is connected with one end of the coupling 11, the other end of the coupling 11 is connected and fixed with the roller of any roller 6, and the coupling 11 is fixed and installed with the mounting frame 3 through an installation part 15 in the mounting frame 3.
In this embodiment, the constant resistance generator includes a friction wheel 12, a friction clamping plate 13, and a micro motor, wherein the friction wheel 12 is fixedly connected with one end of the coupling 11, the friction wheel 12 is located between the friction clamping plates 13, and the micro motor controls the opening and closing degree of the friction clamping plates 13 to realize the control of the resistance between the friction wheel 12.
The constant resistance generator in the embodiment comprises a friction wheel 12, a friction clamping plate 13 and a micro motor, wherein the friction wheel 12 is applied with constant force through the micro motor and the friction clamping plate 13, and the constant resistance generator can control the instant dropping of the counterweight 4 by matching with the electric control switch module, and also solves the problem that the measuring needle 5 is possibly bent.
Example 3
As shown in fig. 6, the present embodiment includes.
A cement setting time tester comprises a tray 1, a support column 2, a mounting frame 3, a counterweight 4, a measuring needle 5, a fixing device and a damping buffer.
Wherein the mounting bracket 3 is fixed on the tray 1 through the installation of support column 2, and counter weight 4 and fixing device are all installed on the mounting bracket 3, and measuring needle 5 is installed in counter weight 4 one end, and counter weight 4 installation is fixed with protruding 16, damping buffer install and fix in the mounting bracket 3.
The mounting frame 3 is a hollow cylinder, a scale groove communicated with the hollow inside is formed in the outer surface of the mounting frame 3, the bulge 16 penetrates out of the scale, the effect of limiting and marking the height is achieved, and the mounting table 14 for mounting the damping buffer is arranged in the mounting frame 3.
The invention is provided with the damping buffer, when the cement initial setting time is measured, the impact force of the probe 5 is reduced to the size which can be borne by one probe 5 by the damping buffer before the probe 5 collides with the bottom plate, so that the problem of bending of the probe 5 caused by collision is solved.
In this embodiment, fixing device includes gyro wheel 6, automatically controlled switch module, resistance control module, and the quantity of gyro wheel 6 has two at least, and two gyro wheels 6 clip counter weight 4, and the frictional force between gyro wheel 6 and the counter weight 4 is greater than the gravity of counter weight 4 far away, and the gravity of counter weight 4 is greater than the rotatory resistance of gyro wheel 6 far away, and resistance control module is fixed with the roller bearing installation of two gyro wheels 6, and the resistance size of control roller bearing rotation in-process, automatically controlled switch module and resistance control module signal connection control roller bearing's rotation and stop.
The fixing device comprises a roller 6, an electric control switch module and a resistance control module, and solves the problem of unavoidable errors when the counterweight 4 is released manually in the test process.
In this embodiment, the damping buffer includes an impact pad 7, a piston rod 8, a piston disc 9, and an empty cylinder 10, wherein the impact pad 7 is fixedly installed at one end of the piston rod 8, the piston disc 9 is fixedly installed at the other end of the piston rod 8, one end of the piston rod 8 with the piston disc 9 is installed into the empty cylinder 10, the empty cylinder 10 is a hollow cylinder with one end open, the piston disc 9 and the empty cylinder 10 are in interference fit, and a plurality of tiny through holes are arranged on the piston disc 9.
The damping buffer comprises an impact pad 7, a piston rod 8, a piston disc 9 and an empty cylinder 10, and the impact force of the counterweight 4 is buffered through gas compression, so that the problem of overlarge volume of a hydraulic buffer with equivalent function is solved while the probe 5 is protected.
In this embodiment, the resistance control module includes a coupling 11 and a constant resistance generator, wherein the constant resistance generator is connected with one end of the coupling 11, the other end of the coupling 11 is connected and fixed with the roller of any roller 6, and the coupling 11 is fixed and installed with the mounting frame 3 through an installation part 15 in the mounting frame 3.
In this embodiment, the constant resistance generator includes a friction wheel 12, a friction clamping plate 13, and a micro motor, wherein the friction wheel 12 is fixedly connected with one end of the coupling 11, the friction wheel 12 is located between the friction clamping plates 13, and the micro motor controls the opening and closing degree of the friction clamping plates 13 to realize the control of the resistance between the friction wheel 12.
The constant resistance generator comprises the friction wheel 12, the friction clamping plate 13 and the micro motor, wherein the friction wheel 12 is applied with constant force through the micro motor and the friction clamping plate 13, and the constant resistance generator can control the instant dropping of the counterweight 4 by matching with the electric control switch module, so that the problem that the measuring needle 5 is possibly bent is solved.
The working process comprises the following steps: when the cement initial setting time needs to be measured, the stirred cement is firstly placed on the tray 1, after the cement pretreatment is finished, the measuring needle 5 is manually lifted to the corresponding position, then the constant resistance generator is adjusted according to the balance weight 4, namely the pressure applied by the friction clamping plate 13 to the friction wheel 12 is adjusted, after the adjustment is finished, the motor is started, the friction clamping plate 13 moves to the position which is adjusted in advance, the balance weight 4 is dropped by gravity, the measuring needle 5 enters the cement, if the value of the constant resistance generator is adjusted wrongly, and when the impact force of the balance weight 4 is overlarge, the bulge 16 on the balance weight 4 can collide on the damping buffer to buffer, so that the measuring needle 5 is protected.
It will be appreciated that the height of the piston rod 8 of the damping buffer is adjustable, and can be adjusted to a height that does not affect the results as required by the experiment.
Example 4
According to fig. 7, on the basis of embodiment 3, unlike embodiment 3, the weight 4 includes a cylindrical body and a convex ring 17, the maximum radius of the convex ring 17 is 1-3 mm larger than the maximum radius of the cylindrical body, the height of the convex ring 17 is 0.5-1 mm, and the convex ring 17 is mounted and fixed on the cylindrical body.
Be equipped with detachable bulge loop 17 on the counter weight 4, when the initial setting test, can overlap bulge loop 17 on the cylinder to guarantee that the distance of the biggest radius position of bulge loop 17 to needle 5 extreme point is less than the contact point of gyro wheel 6 and cylinder to needle 5 extreme point's distance 2-4 millimeters, can play the buffering before needle 5 bottoms out and control, prevented the crooked of needle 5, wherein be equipped with the reducing device that is used for bulge loop 17 business turn over on the mounting bracket 3.
The reducing device is specifically a detachable gasket, the detachable gasket is fixedly arranged on the mounting frame 3, a round hole is formed in the middle of the detachable gasket, the radius of the round hole is identical to that of the counterweight 4, a mounting hole for mounting the detachable gasket is formed in the mounting frame 3, and the radius of the mounting hole is larger than the maximum radius of the convex ring 17.
Example 5
According to fig. 8, on the basis of example 4, unlike example 4, a pressure sensor 20 and a resistance measurement sensor 21 are provided at the tip of the needle 19 of the stylus 5, and a signal transmitting module 22 is provided in the stylus 5 to transmit signals sensed by the pressure sensor 20 and the resistance measurement to an analyzing module.
Specifically, the stylus 5 includes a mounting head 18, a needle 19, a pressure sensor 20, a resistance measurement sensor 21, and a signal transmitting module 22. The two ends of the mounting head 18 are respectively provided with a needle 19 mounting part 15 and a counterweight 4 mounting part 15, one end of the counterweight 4 mounting part 15 is provided with a cavity, a signal transmitting module 22 is mounted in the cavity, the needle 19 is a hollow cylinder, and a pressure sensor 20 and a resistance measuring sensor 21 are both mounted at the tail end of the needle 19 and are connected with the signal transmitting module 22 in the mounting head 18 through wires.
It will be appreciated that the pressure sensor 20 and the resistance measurement sensing and signal transmission module 22 and the analysis module are of the prior art, wherein the pressure of the needle 19 after entering the cement is measured, the resistance generator can be sized so that the resistance is adjusted to the most reasonable value, and the resistance measurement sensor 21 is used for measuring the resistance of the cement, and the resistance values, accurate initial setting and final setting time can be combined due to the different resistances of the cement during setting.
Since mechanical measurements inevitably produce errors in each measurement, the present embodiment incorporates multiple parameter simultaneous measurements for error reduction, by multiple parameter comparison.
An indicator light is arranged on the mounting frame and is in signal connection with the pressure sensor 20, and the indicator light is lightened when the measuring needle touches cement.
Because in actual measurement, the test can be carried out by a plurality of different experimenters generally, experimental error can be increased, and particularly when the needle is aligned, the condition that the needle head does not touch the cement surface can often occur, so the visualization of the needle step in the test process is realized by arranging the indicator lamp and the pressure sensor, and the same test precision can be achieved by different operators.
It can be understood that the above structures are arranged on the initial setting needle, the standard consistency needle and the final setting needle so as to realize the accurate measurement of the whole process section.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (7)
1. The tester for the cement setting time comprises a tray (1), a support column (2), a mounting rack (3), a counterweight (4), a measuring needle (5) and a fixing device, and is characterized by further comprising a damping buffer;
The mounting frame (3) is fixedly arranged on the tray (1) through the supporting column (2), the balance weight (4) and the fixing device are both arranged on the mounting frame (3), the measuring needle (5) is arranged at one end of the balance weight (4), the balance weight (4) is fixedly provided with the bulge (16), and the damping buffer is fixedly arranged in the mounting frame (3);
The mounting frame (3) is a hollow cylinder, a scale groove communicated with the hollow inside is formed in the outer surface of the mounting frame (3), the bulge (16) penetrates out of the scale, the effects of limiting and marking the height are achieved, and a mounting table (14) for mounting the damping buffer is arranged in the mounting frame (3);
The damping buffer comprises an impact pad (7), a piston rod (8), a piston disc (9) and an empty cylinder (10), wherein the impact pad (7) is fixedly arranged at one end of the piston rod (8), the piston disc (9) is fixedly arranged at the other end of the piston rod (8), one end of the piston rod (8) provided with the piston disc (9) is arranged in the empty cylinder (10), the empty cylinder (10) is a hollow cylinder with one end open, the piston disc (9) and the empty cylinder (10) are in interference fit, and a plurality of tiny through holes are formed in the piston disc (9);
The fixing device comprises rollers (6), electric control switch modules and resistance control modules, wherein the number of the rollers (6) is at least two, the two rollers (6) clamp the balance weight (4), the friction force between the rollers (6) and the balance weight (4) is more than 20 times of the gravity of the balance weight (4), the gravity of the balance weight (4) is more than 20 times of the rotation resistance of the rollers (6), the resistance control modules are fixedly installed on rollers of the two rollers (6), the resistance in the rotation process of the rollers is controlled, the electric control switch modules are in signal connection with the resistance control modules, and the rotation and the stop of the rollers are controlled.
2. The cement setting time tester according to claim 1, wherein the resistance control module comprises a coupler (11) and a constant resistance generator, wherein the constant resistance generator is connected with one end of the coupler (11), the other end of the coupler (11) is fixedly connected with a roller of any roller (6), and the coupler (11) is fixedly installed with the mounting frame (3) through an installation part (15) in the mounting frame (3).
3. The cement setting time tester according to claim 2, wherein the constant resistance generator comprises friction wheels (12), friction clamping plates (13) and a miniature motor, wherein the friction wheels (12) are fixedly connected with one end of the coupling (11), the friction wheels (12) are positioned between the friction clamping plates (13), and the miniature motor controls the opening and closing degree of the friction clamping plates (13).
4. A cement setting time tester according to claim 3, characterized in that the counterweight (4) further comprises a convex ring (17), the maximum radius of the convex ring (17) is 1-3 mm larger than the maximum radius of the cylinder, the height of the convex ring (17) is 0.5-1 mm, the convex ring (17) is fixedly arranged on the cylinder, wherein the mounting frame (3) is provided with a diameter changing device for the convex ring (17) to go in and out in an adaptive manner.
5. The cement setting time tester according to claim 4, wherein the reducing device is specifically a detachable gasket, the detachable gasket is fixedly arranged on the mounting frame (3), a round hole is arranged in the middle of the detachable gasket, the radius of the round hole is the same as that of the counterweight (4), the mounting frame (3) is provided with a mounting hole for mounting the detachable gasket, and the radius of the mounting hole is larger than the maximum radius of the convex ring (17).
6. A cement setting time tester according to claim 2, characterized in that a pressure sensor (20) and a resistance measuring sensor (21) are arranged at the end of the needle head (19) of the measuring needle (5), and a signal transmitting module (22) is arranged in the measuring needle (5) to transmit signals sensed by the pressure sensor (20) and the resistance measuring sensor to the analyzing module.
7. The cement setting time tester according to claim 6, wherein an indicator lamp is arranged on the mounting frame, the indicator lamp is in signal connection with the pressure sensor (20), and the indicator lamp is lightened when the measuring needle (5) touches cement.
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