Manufacturing device for primary lining model of shaft

Abstract

The utility model belongs to the field of shaft testing, and relates to a manufacturing device of a shaft primary lining model. The manufacturing device of the shaft primary lining model comprises an outer shell provided with a U-shaped groove, and the same outer shell can be used for manufacturing a plurality of shaft primary lining models with different thicknesses. A built-in mold is arranged in the U-shaped groove, and the model of the built-in mold can be replaced. The two baffles, the outer shell and the built-in mold jointly form a pouring space of the shaft primary lining model, and manufacturing of shaft primary lining models of different thicknesses can be achieved by replacing built-in molds of different models. A plurality of pouring holes communicating with the pouring space of the shaft primary lining model are formed in the outer shell, and pouring liquid is poured into the pouring space through the pouring holes for pouring. According to the manufacturing device of the shaft primary lining model, manufacturing of shaft primary lining models with different thicknesses can be achieved, and deformation experiments of the shaft primary lining models with different thicknesses can be achieved through the experimental device.

Description

Technical Field

[0001] The utility model belongs to the field of wellbore testing and relates to a manufacturing device for a wellbore primary lining model. Background Art

[0002] As the mining depth of coal mines gradually increases, the mining level needs to be gradually extended downward. As an important development tunnel for the extension of mining levels, the stability of the shaft has an important impact on the overall safe and efficient production of the mine. In shaft support, a reasonable primary lining thickness can not only improve the stability of the surrounding rock, but also prevent the surrounding rock from weathering and weakening. At present, when analyzing and determining the thickness of the shaft primary lining, most researchers use theoretical analysis or numerical simulation methods to study. Since the conditions of theoretical analysis and numerical simulation are relatively ideal, there is a large deviation from the actual situation, and it is impossible to concretely and intuitively reflect the deformation degree and stress state of the shaft primary lining at each stage. Similar simulation tests can more accurately reflect the deformation and destruction process of shaft tunnels, but it is difficult to make shaft primary lining models of different thicknesses. Generally, they are made by punching holes in the complete mold. This method not only has poor molding quality of the primary lining model, but also is easy to collapse. Utility Model Content

[0003] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the utility model is to provide a device for making a preliminary lining model of a wellbore. The device for making a preliminary lining model of a wellbore of the utility model can realize the production of preliminary lining models of wellbore of different thicknesses, and the quality of the produced preliminary lining models of wellbore is reliable. The experimental device of the utility model can realize deformation experiments of preliminary lining models of wellbore of different thicknesses.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a manufacturing device for a preliminary lining model of a wellbore, comprising an outer shell body provided with a U-shaped groove, an internal mold arranged in the U-shaped groove, baffles provided at both ends of the internal mold, the baffles fixedly connected to the outer shell body, a casting space of the preliminary lining model of the wellbore is formed together by the two baffles, the outer shell body and the internal mold, and a plurality of casting holes connected to the casting space of the preliminary lining model of the wellbore are provided on the outer shell body.

[0006] Furthermore, the outer surface of the built-in mold follows the shape of the U-shaped groove of the outer shell.

[0007] Furthermore, the two baffles include a first baffle and a second baffle, the first baffle is fixedly connected to the outer shell, and the second baffle is detachably fixedly connected to the outer shell.

[0008] Furthermore, a plurality of first mounting holes are formed on the outer shell, and a plurality of third mounting holes corresponding to the first mounting holes are formed on the second baffle.

[0009] Furthermore, a second mounting hole is formed on the built-in mold, and a fourth mounting hole corresponding to the second mounting hole is formed on the second baffle.

[0010] Furthermore, a track groove is provided on the outer shell, and a track matching the track groove is provided on the inner mold.

[0011] Furthermore, the track groove is located on the U-shaped groove on the outer shell.

[0012] Furthermore, the cross-section of the outer shell is a U-shaped structure.

[0013] Furthermore, the pouring holes are located at the top of the outer shell, and the pouring holes are distributed at equal intervals.

[0014] The utility model also discloses a thickness optimization experimental device for a shaft primary lining model, comprising a mold box, wherein the mold box is filled with a test block, and a jack is arranged between the test block and the top cover of the mold box.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The manufacturing device of the initial lining model of the wellbore of the utility model comprises an outer shell body provided with a U-shaped groove, and the same outer shell body can be used for manufacturing a plurality of initial lining models of the wellbore of different thicknesses. A built-in mold is arranged in the U-shaped groove, and the model of the built-in mold can be replaced. The two baffles, the outer shell body and the built-in mold together form a casting space of the initial lining model of the wellbore, and the replacement of built-in molds of different models can realize the manufacturing of the initial lining model of the wellbore of different thicknesses. The outer shell body is provided with a plurality of casting holes connected to the casting space of the initial lining model of the wellbore, and casting liquid is poured into the casting space through the casting holes for casting. The initial lining model of the wellbore is manufactured by casting, and the initial lining model of the wellbore is high in strength and reliable in quality. In addition, the casting device is reusable and easy to install and disassemble, which is conducive to improving efficiency.

[0017] The utility model thickness optimization experimental device includes a mold box, which is the main place for thickness optimization experiments. The mold box is filled with test blocks, and a wellbore primary lining model is embedded in the test blocks. The test blocks are helpful to ensure the force balance of the wellbore primary lining model. When testing different wellbore primary lining models, different test blocks need to be made. A jack is provided between the test block and the top cover of the mold box, and pressure is applied to the test block through the jack. The utility model experimental device can realize deformation experiments of wellbore primary lining models of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the outer shell of the utility model;

[0019] Figure 2 A positional relationship diagram of the outer shell and the first baffle of the utility model;

[0020] Figure 3 This is a diagram showing the position relationship between the outer shell and the built-in mold of the utility model;

[0021] Figure 4 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 5 The schematic diagram of the structure of the primary lining model of the wellbore with strain gauges attached;

[0023] Figure 6 Schematic diagram of the structure of the thickness optimization experimental device for the primary lining model of the wellbore.

[0024] Among them: 1. outer shell; 101. casting hole; 102. first mounting hole; 103. track groove; 2. built-in mold; 201. second mounting hole; 202. track; 3. baffle; 301. third mounting hole; 302. nut; 303. first baffle; 304. second baffle; 305. fourth mounting hole; 4. shaft initial lining model; 401. strain gauge; 5. mold box; 501. test block; 502. jack. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] The utility model is further described in detail below with reference to the accompanying drawings:

[0028] See also Figure 4The utility model discloses a manufacturing device for a shaft primary lining model, comprising an outer shell 1 with a U-shaped groove, see Figure 1 The same outer shell 1 can be used to make multiple wellbore primary lining models 4 of different thicknesses. An internal mold 2 is arranged in the U-shaped groove, and the model of the internal mold 2 can be changed. Both ends of the internal mold 2 are provided with baffles 3, which are fixedly connected to the outer shell 1. Figure 2 The two baffles 3, the outer shell 1 and the internal mold 2 together form a casting space for the shaft primary lining model 4. By replacing different types of internal molds 2, the shaft primary lining model 4 of different thicknesses can be made. Figure 5 It is a structural diagram of the initial lining model of the shaft. A plurality of casting holes 101 connected to the casting space of the initial lining model 4 of the shaft are provided on the outer shell 1, and casting liquid is poured into the casting space through the casting holes 101 for casting. The manufacturing device of the initial lining model of the shaft of the utility model can realize the manufacturing of the initial lining model 4 of the shaft of the shaft of different thicknesses. The initial lining model of the shaft of the shaft is manufactured by casting, and the initial lining model of the shaft of the shaft of the shaft is high in strength, and the quality of the manufactured initial lining model of the shaft of the shaft of the shaft is reliable. Moreover, the casting device is reusable and easy to install and disassemble, which is conducive to improving efficiency.

[0029] See also Figure 4 In another feasible embodiment of the utility model, the following is adaptively modified according to the situation. It includes an outer shell 1 with a U-shaped groove, an internal mold 2 is arranged in the U-shaped groove, baffles 3 are provided at both ends of the internal mold 2, the baffles 3 are fixedly connected to the outer shell 1, and the two baffles 3, the outer shell 1 and the internal mold 2 together form a casting space for the shaft primary lining model 4, and the outer shell 1 is provided with a plurality of casting holes 101 connected to the casting space of the shaft primary lining model 4.

[0030] In the specific operation, lubricating oil is applied to the inside of the outer shell 1 and the outside of the built-in mold 2, the outer shell 1, the built-in mold 2 and the two baffles 3 are assembled, and the pouring liquid is injected into the pouring space through the pouring hole 101. After the material is formed for a certain period of time, the outer shell 1, the built-in mold 2 and the two baffles 3 are removed to obtain the shaft primary lining model 4. When making shaft primary lining models 4 of different thicknesses, it is only necessary to replace the built-in molds 2 of different models.

[0031] Embodiment 1:

[0032] See also Figure 4 The present embodiment discloses a device for manufacturing a preliminary lining model of a wellbore, comprising an outer shell 1 with a U-shaped groove, an inner mold 2 arranged in the U-shaped groove, baffles 3 provided at both ends of the inner mold 2, the baffles 3 fixedly connected to the outer shell 1, the two baffles 3, the outer shell 1 and the inner mold 2 together form a casting space for the preliminary lining model 4 of the wellbore, and the outer shell 1 is provided with a plurality of casting holes 101 connected to the casting space of the preliminary lining model 4 of the wellbore.

[0033] The outer surface of the inner mold 2 follows the U-shaped groove of the outer shell 1, see Figure 3 .

[0034] Embodiment 2:

[0035] See also Figure 4 The present embodiment discloses a device for manufacturing a preliminary lining model of a wellbore, comprising an outer shell 1 with a U-shaped groove, an inner mold 2 arranged in the U-shaped groove, baffles 3 provided at both ends of the inner mold 2, the baffles 3 fixedly connected to the outer shell 1, the two baffles 3, the outer shell 1 and the inner mold 2 together form a casting space for the preliminary lining model 4 of the wellbore, and the outer shell 1 is provided with a plurality of casting holes 101 connected to the casting space of the preliminary lining model 4 of the wellbore.

[0036] The two baffles 3 include a first baffle 303 and a second baffle 304. The first baffle 303 is fixedly connected to the outer shell 1. Figure 2 The second baffle 304 is detachably fixedly connected to the outer shell 1, see Figure 4 After the second baffle 304 is removed, it is convenient to assemble the built-in mold 2 and the outer shell 1.

[0037] See also Figure 4 The outer shell 1 is provided with a plurality of first mounting holes 102 , and the second baffle plate 304 is provided with a plurality of third mounting holes 301 corresponding to the first mounting holes 102 . Nuts 302 are inserted into both the first mounting holes 102 and the third mounting holes 301 , and the second baffle plate 304 is fixed to the outer shell 1 through the nuts 302 .

[0038] See also Figure 4 A second mounting hole 201 is provided on the built-in mold 2, and a fourth mounting hole 305 corresponding to the second mounting hole 201 is provided on the second baffle plate 304. Nuts 302 are inserted into both the second mounting hole 201 and the fourth mounting hole 305, and the second baffle plate 304 is fixedly connected to the built-in mold 2 through the nuts 302.

[0039] Embodiment three:

[0040] See also Figure 4 Based on the above embodiment, the outer shell 1 of this embodiment is provided with a track groove 103, and the internal mold 2 is provided with a track 202 matching the track groove 103. After removing the second baffle 304, different types of internal molds 2 can be replaced, and the internal mold 2 and the outer shell 1 can slide relative to each other through the track groove 103 and the track 202, which is convenient for the installation and removal of the outer shell 1 and the internal mold 2. At the same time, the track groove 103 and the track 202 facilitate the sealing of the opening of the internal mold 2 and the outer shell 1.

[0041] The track groove 103 is located on the U-shaped groove on the outer shell 1 .

[0042] Embodiment 4:

[0043] See also Figure 4 The present embodiment discloses a device for manufacturing a preliminary lining model of a wellbore, comprising an outer shell 1 with a U-shaped groove, an inner mold 2 arranged in the U-shaped groove, baffles 3 provided at both ends of the inner mold 2, the baffles 3 fixedly connected to the outer shell 1, the two baffles 3, the outer shell 1 and the inner mold 2 together form a casting space for the preliminary lining model 4 of the wellbore, and the outer shell 1 is provided with a plurality of casting holes 101 connected to the casting space of the preliminary lining model 4 of the wellbore.

[0044] The cross section of the outer shell 1 is a U-shaped structure. According to actual production requirements, the outer shell 1 can also be made into other shapes.

[0045] The pouring holes 101 are located at the top of the outer shell 1, which facilitates the pouring liquid to flow down and the air bubbles to be discharged. The pouring holes 101 are distributed at equal intervals.

[0046] Embodiment five:

[0047] See also Figure 4 This embodiment discloses a device for manufacturing a primary lining model of a wellbore, including an outer shell 1, an inner mold 2 and a baffle 3.

[0048] The outer shell 1 is made of plastic, with a pouring hole 101 for pouring the primary lining material on the top, a solid baffle 3 at the rear, a first mounting hole 102 at the front arched edge, and track grooves 103 on both sides of the bottom of the shell.

[0049] The internal mold 2 is also made of a plastic entity. Different sizes of the internal mold 2 are made according to the thickness of the primary lining of the similar simulation. The upper part of the internal mold 2 is arched, and a track 202 matching the track groove 103 of the outer shell 1 is extended from the lower part.

[0050] The baffle plate 3 is provided with a third mounting hole 301 and a fourth mounting hole 305 which match the edge of the outer shell 1 and the mounting holes reserved on the built-in mold 2 and are installed through nuts 302 to prevent slurry from escaping during pouring.

[0051] The outer shell 1 and the internal mold 2 are made in proportion to the actual wellbore primary lining thickness. After installation, the surface of the internal mold 2 with the second installation hole 201 is flush with the surface of the outer shell 1 with the first installation hole 102.

[0052] See also Figure 6The utility model discloses a thickness optimization experimental device for a wellbore primary lining model, comprising a mold box 5, which is the main place for the thickness optimization experiment. The mold box 5 is filled with a test block 501, and a wellbore primary lining model 4 is buried in the test block 501. When the thickness optimization experiment is performed, strain gauges 401 are evenly pasted on the upper part and both sides of the wellbore primary lining model 4, and the wellbore primary lining model 4 with the strain gauges 401 pasted is buried in the casting material until the casting material forms the test block 501. The test block 501 is conducive to ensuring the force balance of the wellbore primary lining model 4. When testing different wellbore primary lining models 4, different test blocks 501 need to be made. A jack 502 is arranged between the test block 501 and the top cover of the mold box 5, and pressure is applied to the test block 501 through the jack 502, and strain data is obtained through the strain gauge 401. When the wellbore primary lining model 4 is obviously damaged or the loading stress suddenly decreases, the test is stopped. The experimental device of the utility model can realize deformation experiments of primary lining models of wellbore with different thicknesses.

[0053] Based on the above structure, the utility model discloses a method for making a coal mine shaft primary lining model and a thickness optimization test method, comprising the following steps:

[0054] S1. Apply lubricating oil to the inside of the outer shell 1 and the outside of the built-in mold 2.

[0055] S2. Align the track of the built-in mold 2 with the track groove of the outer shell 1 and push it inward to the bottom.

[0056] S3. Align the baffle with the mounting hole and secure it with screws.

[0057] S4. Inject the prepared primary lining casting material into the model through the casting hole 101 above the outer shell 1.

[0058] S5. After the material is formed for a certain period of time, unscrew the baffle, slowly push the outer shell 1 backward, then press the formed shaft primary lining model 4, push out the built-in mold 2, and take out the shaft primary lining model 4.

[0059] S6. After the shaft primary lining model 4 is cured for a certain period of time, strain gauges 401 are evenly pasted on the upper part and both sides of the shaft primary lining model 4 to monitor its deformation.

[0060] S7. Prepare the mold box 5, use the test block 501 to cast and make the test block, when the test block is cast to the middle position of the mold box 5, place the shaft primary lining model 4, continue to cast the test block, take out the test block after it is formed, and put it into the jack 502, record the data of the strain gauge during the test, and stop the test when the shaft primary lining model 4 is obviously damaged or the loading stress suddenly decreases.

[0061] S8. Insert the pipeline endoscope into the damaged wellbore primary lining model 4, observe the development of cracks on the inner wall of the wellbore primary lining model 4, and analyze its damage characteristics.

[0062] S9. Make shaft primary lining models 4 of different thicknesses, repeat steps S6 to S8, complete similar simulation tests of shaft primary lining models 4 of different thicknesses, and select a reasonable primary lining thickness through comparative analysis of deformation conditions and failure characteristics. This method can more intuitively analyze and study the reasonable shaft primary lining thickness.

[0063] The manufacturing device of the wellbore primary lining model of the utility model can realize the manufacturing of wellbore primary lining models 4 of different thicknesses, and the wellbore forming effect is good. The experimental device of the utility model can realize the deformation experiment of wellbore primary lining models of different thicknesses, and can change the thickness of the wellbore primary lining model 4 of similar simulation according to the research requirements, and can timely and intuitively monitor the deformation and damage of the primary lining, and the operation is simple, which is of great significance in the research of the thickness of the wellbore primary lining.

[0064] The above content is only for explaining the technical idea of ​​the utility model and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.

Claims

1. A device for making a primary lining model of a wellbore, characterized in that: The invention comprises an outer shell (1) provided with a U-shaped groove, an inner mold (2) being arranged in the U-shaped groove, baffles (3) being provided at both ends of the inner mold (2), the baffles (3) being fixedly connected to the outer shell (1), a casting space for a shaft primary lining model (4) being formed between the two baffles (3), the outer shell (1) and the inner mold (2), and a plurality of casting holes (101) being provided on the outer shell (1) and being connected to the casting space of the shaft primary lining model (4).

2. The device for making a primary lining model of a wellbore according to claim 1, characterized in that: The outer surface of the built-in mold (2) follows the shape of the U-shaped groove of the outer shell (1).

3. A device for making a primary lining model of a wellbore according to claim 2, characterized in that: The two baffles (3) comprise a first baffle (303) and a second baffle (304); the first baffle (303) is fixedly connected to the outer shell (1), and the second baffle (304) is detachably fixedly connected to the outer shell (1).

4. A device for making a primary lining model of a wellbore as claimed in claim 3, characterized in that: The outer shell (1) is provided with a plurality of first mounting holes (102), and the second baffle (304) is provided with a plurality of third mounting holes (301) corresponding to the first mounting holes (102).

5. The device for making a primary lining model of a wellbore according to claim 4, characterized in that: The built-in mold (2) is provided with a second mounting hole (201), and the second baffle (304) is provided with a fourth mounting hole (305) corresponding to the second mounting hole (201).

6. A device for making a primary lining model of a wellbore as claimed in claim 5, characterized in that: The outer shell (1) is provided with a track groove (103), and the inner mold (2) is provided with a track (202) matching the track groove (103).

7. A manufacturing device for a shaft primary lining model according to claim 6, characterized in that: The track groove (103) is located on the U-shaped groove on the outer shell (1).

8. The device for making a primary lining model of a wellbore according to claim 7, characterized in that: The cross section of the outer shell (1) is a U-shaped structure.

9. A manufacturing device for a shaft primary lining model according to claim 8, characterized in that: The pouring holes (101) are located at the top of the outer shell (1), and the pouring holes (101) are distributed at equal intervals.

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