CN216051013U - Pressurizing device for manufacturing coal seam sample for water fracturing test - Google Patents
Pressurizing device for manufacturing coal seam sample for water fracturing test Download PDFInfo
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- CN216051013U CN216051013U CN202122138617.8U CN202122138617U CN216051013U CN 216051013 U CN216051013 U CN 216051013U CN 202122138617 U CN202122138617 U CN 202122138617U CN 216051013 U CN216051013 U CN 216051013U
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Abstract
The utility model relates to the technical field of coal seam mining simulation experiments, in particular to a pressurizing device for manufacturing a coal seam sample in a hydraulic fracturing test, which comprises: a hydraulic cylinder, a first end of which is connected to the load mechanism; a pressurizing plate detachably connected to the second end of the hydraulic cylinder and having a rectangular pressurizing end surface; an ultrasonic vibration member connected to the pressurizing plate for ultrasonically vibrating the sample under the pressurizing end face; and an electric heating component arranged inside the pressurizing plate and used for heating the pressurizing end face to a preset temperature. According to the utility model, the printed structural layer is pressurized and matched with ultrasonic vibration to extrude bubbles in the paste, so that the paste is more uniform, and the moisture of the paste can be evaporated more quickly by matching with the heating of the electric heating wire, so that the printed structural layer is shaped more quickly, the manufacturing speed of the whole sample is improved, and the structure of the sample manufactured in the way is standard and uniform, and the correct test structure and rule can be obtained more favorably.
Description
Technical Field
The utility model relates to the technical field of coal seam mining simulation experiments, in particular to a pressurizing device for manufacturing a coal seam sample in a hydraulic fracturing test.
Background
The basic principle of hydraulic fracturing is that a large amount of high-pressure liquid mixed with a propping agent is pumped into a reservoir through a shaft to force the reservoir to be fractured to form an artificial fracture, so that the propping agent fills and props the fracture, and the pore permeability characteristic of the reservoir is improved.
The simulation sample prepared in the laboratory at present generally adopts slurry formed by mixing materials such as cement, coal ash, fine sand, gypsum and the like to carry out manual pouring, and is subjected to setting and forming after the manual pouring, the thickness and the flatness of different structural layers of each sample prepared by the method are different, and particularly, the mixed slurry is not uniformly mixed, so that the mechanical influence on the sample is great. The actual experimental result depends on the standard of the simulation sample, and the difference generated by manual production of each sample may have a great influence on the experimental result, so that the relation between the experimental results of each sample is interfered, the search of the experimental rule is hindered, or the wrong experimental rule is obtained.
Therefore, aiming at the problem that the existing sample has generally uneven air bubbles and slurry distribution in the slurry pouring-marquise forming process of the sample, the prior art tries to manufacture the sample in a mode of mixing and extruding slurry layer by layer in a 3D printing mode to enable the sample to be more standard and uniform, for example, in a simulation sample manufacturing method for hydraulic fracturing test of a broken soft coal seam disclosed in patent document with publication No. CN112761584A, coal powder, fine sand, cement and water are mixed to form coal seam slurry, gypsum, fine sand, cement and water are mixed to form coal seam interface slurry, fine sand, cement and water are mixed to form roof slurry, and the coal seam slurry, the coal seam interface slurry and the roof slurry are respectively placed in separate containers; and then the slurry is input into the extrusion cylinder through a conveying pipeline, the slurry is moved to the upper part of the bottom plate by the extrusion head and is printed by a mechanical arm or other control components according to a preset path, and after one or more layers are printed, pressurization is carried out to complete the printing of the coal bed, the coal bed interface layer and the top plate layer. And reserving a placing space of the simulation shaft in a preset height layer in the top plate layer, arranging the simulation shaft at the same time, and pressurizing and setting from top to bottom after printing is finished to obtain a simulation sample.
The sample structure combined with the diagram comprises a coal seam, a coal seam interface, a top plate layer and a simulation well bore. In coal seam printing, coal seam interface layer printing and roof layer printing, the printing layer needs to be pressurized, but after each layer is printed, drying needs to be waited, and after a structural layer is stabilized, next layer pressurization is carried out, so that the manufacturing time is long.
Therefore, in the application of the above method to the production of printed samples, there is a need for a structural layer pressing device that can increase the drying and molding speed and increase the time for which the samples are produced and molded.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a pressurizing device for manufacturing a coal seam sample for a hydraulic fracturing test, which comprises:
a hydraulic cylinder, a first end of which is connected to the load mechanism;
a pressurizing plate detachably connected to the second end of the hydraulic cylinder and having a rectangular pressurizing end surface;
an ultrasonic vibration member connected to the pressurizing plate for ultrasonically vibrating the sample under the pressurizing end face;
an electric heating member provided inside the pressing plate for heating the pressing end face to a predetermined temperature;
the pressurizing plate is driven by the hydraulic cylinder, so that the pressurizing end face is attached to the sample in the mold and pressurizes the sample.
Preferably, the ultrasonic vibration member includes six ultrasonic vibrators, and the six ultrasonic vibrators are mounted on an end surface of the pressurizing plate on a side away from the pressurizing end surface.
Preferably, the hydraulic cylinder is connected to the middle position of the end face of one side, away from the pressurizing end face, of the pressurizing plate, and the six ultrasonic vibrators are distributed around the axis of the hydraulic cylinder in a central symmetry manner.
Preferably, the pressurizing plate comprises a first plate body and a second plate body, and the first plate body and the second plate body are fixedly connected through bolts.
Preferably, a cavity for accommodating the electric heating component is formed between the first plate body and the second plate body.
Preferably, the electric heating part comprises a heating wire distributed in a serpentine shape, a temperature control circuit connected to the heating wire, and a socket for supplying power to the temperature control circuit.
Preferably, the ultrasonic power density of the ultrasonic vibrator is set to 0.5 to 5kW/mm2。
Preferably, the pressing end face comprises a stainless steel plate or a ceramic plate.
Preferably, the dimension of the pressing end face is 300mm by 300 mm.
Compared with the prior art, the utility model has the advantages that:
according to the utility model, the printed structural layer is pressurized and matched with ultrasonic vibration to extrude bubbles in the paste, so that the paste is more uniform, and the moisture of the paste can be evaporated more quickly by matching with the heating of the electric heating wire, so that the printed structural layer is shaped more quickly, the manufacturing speed of the whole sample is improved, and the structure of the sample manufactured in the way is standard and uniform, and the correct test structure and rule can be obtained more favorably.
It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of the present disclosure unless such concepts are mutually inconsistent. In addition, all combinations of claimed subject matter are considered a part of the inventive subject matter of this disclosure.
The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of specific embodiments in accordance with the teachings of the present invention.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a sample structure shown in the prior art;
FIG. 2 is a schematic view showing the structure of a sample preparation apparatus according to the prior art;
FIG. 3 is a perspective view of a pressurization device for manufacturing a coal seam sample for a hydraulic fracturing test according to the present invention;
FIG. 4 is a top view of a fracturing device for manufacturing a coal seam sample for a hydraulic fracturing test according to the present invention;
fig. 5 is a cross-sectional view of a pressing plate according to the present invention.
Detailed Description
In order to better understand the technical content of the present invention, specific embodiments are described below with reference to the accompanying drawings.
In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to include all aspects of the utility model. It should be understood that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways with any pressurizing apparatus for the production of samples of a water fracturing test coal seam, as the disclosed concepts and embodiments are not limited to any embodiment. In addition, some aspects of the present disclosure may be used alone, or in any suitable combination with other aspects of the present disclosure.
Referring to fig. 3, the present invention aims to overcome the defects of the prior art, and provides a pressurizing device for manufacturing a coal seam sample for a hydraulic fracturing test, which mainly comprises a hydraulic cylinder 1, a pressurizing plate 2, an ultrasonic vibration component and an electric heating component.
Wherein, the first end (load end) of the hydraulic cylinder 1 is connected to the load mechanism, and the second end (telescopic end) of the hydraulic cylinder 1 is connected with the pressure plate 2; in an optional embodiment, the load mechanism is a gantry, specifically, the gantry can drive the hydraulic cylinder 1 to move in an X-Y plane, so that the hydraulic cylinder 1 accurately moves to a position above a sample to be pressurized, on which a structural layer is printed, and the hydraulic cylinder 1 presses the pressurizing plate 2 onto the surface of the sample.
Further, the hydraulic cylinder 1 includes a hydraulic rod 11 and a telescopic rod 12, and the telescopic rod 12 is configured to extend to a predetermined pressure of the pressurizing plate 2 and maintain the pressure for a predetermined period of time. The pressurizing plate 2 and the telescopic rod 12 are fixedly connected by adopting a bolt connection mode.
In this way, it is possible to facilitate the replacement of the pressure plate 2, in this embodiment, the size of the pressure end face is 300mm by 300mm, for making a 300mm by 300mm simulation sample.
As shown in fig. 4 to 5, the end face of the pressurizing plate 2 contacting the sample is a rectangular pressurizing end face. The pressing plate 2 includes a first plate body 21 and a second plate body 22, the first plate body 21 being located above the second plate body 22, wherein the first plate body 21 and the second plate body 22 are fixedly connected by bolts.
Wherein the ultrasonic vibration member is connected to the pressing plate 2.
In an alternative embodiment, the ultrasonic vibration member includes six ultrasonic vibrators 3, and the six ultrasonic vibrators 3 are each mounted to the upper end surface of the first plate body 21. The ultrasonic transducer 3 includes an ultrasonic transducer 31 and an ultrasonic horn 32, and the ultrasonic transducer 31 and the ultrasonic horn 32 constitute an ultrasonic vibration system. The ultrasonic transducer 31 is a device capable of converting high-frequency electric energy into mechanical energy, the ultrasonic amplitude transformer 32 is a passive device, does not generate vibration, and only transmits the vibration input by the ultrasonic transducer after changing the amplitude, so that impedance conversion is completed.
In a preferred example, the ultrasonic power density of the ultrasonic vibrator 3 is set to 0.5 to 5kW/mm2. Six ultrasonic vibrators 3 are distributed around the axis of the hydraulic cylinder in central symmetry. An appropriate number of ultrasonic vibrators 3 may be selected for vibration according to the thickness of the sample.
Further, a cavity for accommodating an electric heating component is formed between the first plate body 21 and the second plate body 22, the electric heating component is positioned in the cavity and used for heating the pressurizing end face to a preset temperature (40-70 degrees centigrade), and in an alternative embodiment, the electric heating component comprises a heating wire 4 distributed in a serpentine shape, a temperature control circuit connected to the heating wire and a socket 41 used for supplying power to the temperature control circuit.
So, when first plate body 21 loaded the sample surface, ultrasonic vibration made thick liquid matter inside mix more even, extruded the bubble in the thick liquid matter, simultaneously because the heating action of heating wire 4 makes the intraformational moisture rapid evaporation of structure of extruding, made the quick shaping of structural layer, improved the speed that the sample was made to the sample structural standard that so made is unified, more is favorable to obtaining correct experimental structure and law.
In alternative embodiments, the second plate 22 is a stainless steel or ceramic plate. Has the advantages of smooth contact surface, high hardness and easy cleaning.
By combining the embodiment, the utility model extrudes the air bubbles in the paste in a manner of pressurizing and matching with ultrasonic vibration on the printed structural layer, so that the paste is more uniform, and the moisture of the paste can be evaporated more quickly by matching with the heating of the electric heating wire, so that the printed structural layer is shaped more quickly, the manufacturing speed of the whole sample is favorably improved, and the structure of the sample manufactured in the way is unified, and the correct test structure and rule are favorably obtained.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the present invention should be determined by the appended claims.
Claims (9)
1. The utility model provides a pressure device is used in preparation of hydraulic fracturing test coal seam sample which characterized in that includes:
a hydraulic cylinder, a first end of which is connected to the load mechanism;
a pressurizing plate detachably connected to the second end of the hydraulic cylinder and having a rectangular pressurizing end surface;
an ultrasonic vibration member connected to the pressurizing plate for ultrasonically vibrating the sample under the pressurizing end face;
an electric heating member provided inside the pressing plate for heating the pressing end face to a predetermined temperature;
the pressurizing plate is driven by the hydraulic cylinder, so that the pressurizing end face is attached to the sample in the mold and pressurizes the sample.
2. The pressurizing device for manufacturing the coal seam sample for the hydraulic fracturing test of claim 1, wherein the ultrasonic vibration component comprises six ultrasonic vibrators, and the six ultrasonic vibrators are all mounted on one side end face, far away from the pressurizing end face, of the pressurizing plate.
3. The device for manufacturing the coal seam sample for the hydraulic fracturing test as claimed in claim 2, wherein the hydraulic cylinder is connected to the middle position of the end surface of the pressurizing plate on the side far away from the pressurizing end surface, and the six ultrasonic vibrators are distributed around the axis of the hydraulic cylinder in a centrosymmetric manner.
4. The device for manufacturing the coal seam sample for the hydraulic fracturing test of claim 1, wherein the pressurizing plate comprises a first plate body and a second plate body, and the first plate body and the second plate body are fixedly connected through bolts.
5. The pressurization device for manufacturing the coal seam sample for the hydraulic fracturing test as claimed in claim 4, wherein a cavity for accommodating the electric heating component is formed between the first plate body and the second plate body.
6. The device for producing a coal seam sample for a hydraulic fracturing test of claim 5, wherein the electric heating component comprises a heating wire distributed in a serpentine shape, a temperature control circuit connected to the heating wire, and a socket for supplying power to the temperature control circuit.
7. The pressurization device for manufacturing the coal seam sample for the hydraulic fracturing test as claimed in claim 2, wherein the ultrasonic power density of the ultrasonic vibrator is set to 0.5-5kW/mm2。
8. The device for manufacturing the coal seam sample for the hydraulic fracturing test of any one of claims 1 to 7, wherein the pressing end face comprises a stainless steel plate or a ceramic plate.
9. The device of claim 8, wherein the face of the pressurizing face is 300mm by 300 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122138617.8U CN216051013U (en) | 2021-09-06 | 2021-09-06 | Pressurizing device for manufacturing coal seam sample for water fracturing test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122138617.8U CN216051013U (en) | 2021-09-06 | 2021-09-06 | Pressurizing device for manufacturing coal seam sample for water fracturing test |
Publications (1)
| Publication Number | Publication Date |
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| CN216051013U true CN216051013U (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122138617.8U Active CN216051013U (en) | 2021-09-06 | 2021-09-06 | Pressurizing device for manufacturing coal seam sample for water fracturing test |
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| CN (1) | CN216051013U (en) |
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2021
- 2021-09-06 CN CN202122138617.8U patent/CN216051013U/en active Active
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