Sprayed concrete test piece forming large plate test mold

Abstract

The utility model discloses a large plate test mold for forming a sprayed concrete test piece, and belongs to the technical field of sprayed concrete forming. The test mold is composed of a test mold body and a support, the test mold body is provided with an uncovered cuboid concrete spraying cavity defined by a bottom plate, two side plates and a sealing plate, and the cuboid concrete spraying cavity is provided with a rectangular opening corresponding to the sealing plate. A test mold meeting the requirement of a sprayed concrete test piece forming specification should be provided with an opening. The bottom of the test mold is connected with a support which can support the test mold, so that a certain included angle is formed between the bottom plate and the horizontal plane. The test mold is prevented from moving in the spraying process, and the stability of the test mold is improved, so that the quality of a sprayed concrete test piece is improved. The device is simple in structure, convenient to disassemble, good in stability, low in manufacturing cost and good in application prospect.

Description

Technical Field

[0001] The utility model belongs to the technical field of shotcrete forming, and relates to a large plate test mold for forming shotcrete test specimens. Background Art

[0002] Shotcrete is a construction method of injecting fine aggregate concrete with a pressure spray gun. Cement, sand, gravel, water and a certain amount of admixtures prepared in advance are loaded into a shotcreting machine. Utilizing high-pressure air, they are sent to the nozzle and mixed with a quick-setting agent, and then sprayed onto the surface of rocks or concrete at a very high speed to form. It is divided into wet shotcrete and dry shotcrete. It is often used for pouring thin-walled structures such as tunnel linings, walls, ceilings, etc., or linings of other structures and protective layers of steel structures.

[0003] The large plate test mold for shotcrete is a test mold used to prepare test specimens for testing the mechanical properties, long-term properties and durability of concrete, and is a commonly used auxiliary device for detecting the performance of shotcrete in construction sites and college laboratories. Currently, the commonly used large plate test molds for shotcrete are cast iron test molds and plastic test molds. The cast iron test mold is strong, durable and has a high recyclable value, but it has a large self-weight and is not convenient to carry; while the plastic test mold is relatively light in weight, but it is difficult to demold and has a high damage rate. In addition, the four sides of both the cast iron test mold and the plastic test mold are closed, which does not meet the requirement of the shotcrete application technical specification that the test mold needs to have an open side. Moreover, when shotcreting, the test mold should form an 80° angle with the horizontal ground, and neither the cast iron test mold nor the plastic test mold has a fixed support during shotcreting and is prone to movement, affecting the shotcreting quality. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a large plate test mold for forming shotcrete test specimens, so as to solve the technical problem that the concrete test mold is prone to movement during shotcreting, affecting the shotcreting quality in the prior art.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a large plate test mold for forming shotcrete test specimens, including a test mold and a bracket; the test mold includes a rectangular bottom plate; on one side of the bottom plate, there are a side plate and a sealing plate; there are two side plates, and the two side plates are oppositely arranged on both sides of the bottom plate, and the side plates are perpendicular to the bottom plate; there is 1 sealing plate, which is arranged on one side of the bottom plate and is perpendicular to the bottom plate and the side plates; the sealing plate and the bottom plate are fixedly connected through a first connecting piece; on the other side of the bottom plate, there is a bracket connected, and the bracket can support the test mold to form an angle between the bottom plate and the horizontal plane.

[0007] Furthermore, the bracket includes a U-shaped support; one end of the open side of the U-shaped support is fixedly connected to the bottom plate on the open side of the test mold; several telescopic rods are connected to the closed end of the U-shaped support; one end of the telescopic rod is detachably connected to the bottom of the bottom plate.

[0008] Furthermore, the U-shaped support and the telescopic rod are connected through a connecting support; the included angle is 80° ± 2°.

[0009] Furthermore, the telescopic rod includes a sleeve and a threaded rod; the sleeve is sleeved outside the threaded rod; several round holes are provided on the threaded rod, and one round hole is provided on the sleeve for adjusting the length of the telescopic rod by bolt fixation.

[0010] Furthermore, a communication hole is provided at the bottom of the bottom plate on the open side of the test mold, and one end of the open side of the U-shaped support is bolted to the bottom plate through the communication hole.

[0011] Furthermore, a connecting mechanism is provided at the bottom of the bottom plate; one end of the telescopic rod is bolted to the bottom of the bottom plate through the connecting mechanism.

[0012] Furthermore, the first connecting member includes a first sleeve and a second sleeve; the second sleeve is fixed to both ends of the bottom of the sealing plate; the first sleeve is fixed to one end of the top of the side plate, and the first sleeve and the second sleeve are coaxially arranged; the first sleeve and the second sleeve are connected by a first connecting rod.

[0013] Furthermore, the side plate is fixedly connected to the bottom plate through a second connecting member.

[0014] Furthermore, the second connecting member includes a third sleeve; the third sleeve is arranged at the top and bottom of one end of the side plate, and the two third sleeves are fixed by a second connecting rod; the third sleeve is located on the open side of the test mold.

[0015] Furthermore, grooves are provided at the joints of the bottom plate with the side plate and the sealing plate respectively; circular grooves are provided at the contact positions of the bottom plate with the first connecting rod and the second connecting rod respectively; threads are provided at the bottoms of the first connecting rod and the second connecting rod for connection with the circular grooves.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model discloses a large plate test mold for forming shotcrete specimens, which is composed of a test mold and a bracket. The test mold is formed by a bottom plate, two side plates and a sealing plate to enclose an uncovered cuboid concrete spraying cavity, and the cuboid shotcrete spraying cavity has a rectangular opening corresponding to the sealing plate. The test mold meeting the requirements of the shotcrete specimen forming specification should have an open requirement. The bottom of the test mold is connected to the bracket, and the bracket can support the test mold to make a certain angle between the bottom plate and the horizontal plane. During the spraying process, the movement of the test mold is avoided, the stability of the test mold is improved, and thus the quality of the shotcrete specimens is enhanced. The structure of the utility model is simple, easy to disassemble, has good stability, low manufacturing cost and good application prospect.

[0018] Further, the telescopic rod of the utility model comprises a threaded rod and a sleeve. A number of round holes are opened on the threaded rod, and one round hole is opened on the sleeve. When in use, the bolt is passed through the round hole below the threaded rod, and after use, the bolt is passed through the round hole above the threaded rod, so that the telescopic rod can be shortened, thus realizing height adjustment.

[0019] Further, a groove structure is arranged on the bottom plate of the utility model; the groove penetrates through the surface of the bottom plate, and the side plate and the sealing plate can enter the groove from one side of the bottom plate, simplifying the installation procedure. And a circular groove is arranged on the bottom plate of the utility model for inserting the first connecting rod and the second connecting rod, and threads are arranged at the bottoms of the first connecting rod and the second connecting rod. The connecting rods are inserted into the circular groove and tightened to ensure the stability of the structure. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is the main view of the large plate test mold for forming shotcrete specimens of the present utility model;

[0022] Figure 2 It is the top view of the test mold part of the present utility model;

[0023] Figure 3 It is the left view of the test mold part of the present utility model;

[0024] Figure 4 It is the right view of the test mold part of the present utility model;

[0025] Figure 5 It is the schematic diagram of the connecting rod of the present utility model;

[0026] Figure 6 The front view of the support part of the present utility model;

[0027] Figure 7 The front view of the support of the present utility model after contraction;

[0028] Figure 8 The bottom view of the test mold of the present utility model.

[0029] Wherein: 1 - bottom plate, 1-1 - communication hole, 1-2 - connection mechanism, 2 - side plate, 3 - sealing plate, 4 - first connecting piece, 4-1 - first sleeve, 4-2 - second sleeve, 4-3 - first connecting rod, 5 - second connecting piece, 5-1 - third sleeve, 5-2 - second connecting rod, 6 - telescopic rod, 6-1 - threaded rod, 6-2 - sleeve, 7 - U-shaped support, 8 - connecting support. Specific embodiments

[0030] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0032] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] In the description of the embodiments of the present utility model, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, it is 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 must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0034] In addition, when the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and it does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0035] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and defined, when terms such as "set", "installed", "connected", and "connected" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The following further describes the present invention in detail with reference to the drawings:

[0037] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the present invention discloses a forming large plate test mold for shotcrete specimens, including a test mold and a bracket; the test mold includes a rectangular bottom plate 1; on one side of the bottom plate 1, there are side plates 2 and a sealing plate 3; there are two side plates 2, and the two side plates 2 are oppositely arranged on both sides of the bottom plate 1, and the side plates 2 are perpendicular to the bottom plate 1; there is 1 sealing plate 3, which is arranged on one side of the bottom plate 1 and perpendicular to the bottom plate 1 and the side plates 2; the sealing plate 3 and the bottom plate 1 are fixedly connected through a first connecting member 4; the test mold is surrounded by one bottom plate 1, two side plates 2 and one sealing plate 3 to form an uncovered cuboid concrete spraying cavity, and the cuboid spraying concrete spraying cavity has a rectangular opening corresponding to the sealing plate 3, and the test mold meeting the requirements of the shotcrete specimen forming specification should have the requirement of an opening. On the other side of the bottom plate 1, there is a bracket connected, and the bracket can support the test mold to form an angle between the bottom plate 1 and the horizontal plane. During the spraying process, the movement of the test mold is avoided, the stability of the test mold is improved, and thus the quality of the shotcrete specimens is improved.

[0038] In a feasible embodiment of the present invention, see Figure 6 , the bracket includes a U-shaped support 7; one open end of the U-shaped support 7 is fixedly connected to the bottom plate 1 on the open side of the test mold; several telescopic rods 6 are connected to the closed end of the U-shaped support 7; one end of the telescopic rod 6 is detachably connected to the bottom of the bottom plate 1. The U-shaped support 7 and the telescopic rod 6 are connected through a connecting support 8; the angle is 80°±2°, meeting the specification requirements, improving the stability of the test mold, and improving the quality of the shotcrete specimens.

[0039] In a feasible embodiment of the present utility model, the telescopic rod 6 includes a sleeve 6-2 and a threaded rod 6-1; the sleeve 6-2 is sleeved outside the threaded rod 6-1; several round holes are provided on the threaded rod 6-1, and a round hole is provided on the sleeve 6-2 for adjusting the length of the telescopic rod 6 by bolt fixation; when in use, the bolt is passed through the round hole below the threaded rod 6-1, and after use, the bolt is passed through the round hole above the threaded rod 6-1, so that the telescopic rod can be shortened, thereby realizing height adjustment. A communication hole 1-1 is provided at the bottom of the bottom plate 1 on the open side of the test mold, and one end of the opening of the U-shaped support 7 is bolted to the bottom plate 1 through the communication hole 1-1. A connecting mechanism 1-2 is provided at the bottom of the bottom plate 1; one end of the telescopic rod 6 is bolted to the bottom of the bottom plate 1 through the connecting mechanism 1-2, as Figure 8 shown.

[0040] In a feasible embodiment of the present utility model, the first connecting member 4 includes a first sleeve 4-1 and a second sleeve 4-2; the second sleeve 4-2 is fixed at both ends of the bottom of the sealing plate 3; the first sleeve 4-1 is fixed at one end of the top of the side plate 2, and the first sleeve 4-1 and the second sleeve 4-2 are coaxially arranged; the first sleeve 4-1 and the second sleeve 4-2 are connected by a first connecting rod 4-3.

[0041] In a feasible embodiment of the present utility model, the side plate 2 is fixedly connected to the bottom plate 1 through a second connecting member 5. The second connecting member 5 includes a third sleeve 5-1; the third sleeve 5-1 is arranged at the top and bottom of one end of the side plate 2, and the two third sleeves 5-1 are fixed by a second connecting rod 5-2; the third sleeve 5-1 is located on the open side of the test mold.

[0042] In a feasible embodiment of the present utility model, grooves are provided at the joints of the bottom plate 1 with the side plate 2 and the sealing plate 3 respectively, and the grooves penetrate the surface of the bottom plate 1. The side plate 2 and the sealing plate 3 can enter the grooves from one side of the bottom plate 1, simplifying the installation procedure; circular grooves are provided at the contact positions of the bottom plate 1 with the first connecting rod 4-3 and the second connecting rod 5-2 respectively; threads are provided at the bottoms of the first connecting rod 4-3 and the second connecting rod 5-2, as Figure 5 shown, insert the connecting rod into the circular groove and tighten it to ensure the stability of the structure..

[0043] The working principle of the present utility model is as follows:

[0044] The test mold main body of the present utility model is connected to the support main body. The bottom plate 1 is thick, which is convenient for setting grooves to fix the side plate 2 and the sealing plate 3. Bases are provided at the four corners of the bottom plate 1, and communication holes 1-1 are provided in two bases on the open side of the base 1 for passing bolts to connect the U-shaped support 7 with the test mold. The adjusting nut can make the support move. After use, place the support. The front view of the test mold after the support shrinks is as Figure 7As shown in the figure, a connection component is provided at the end of the threaded rod 6-1, and is connected to the connection mechanism 1-2 at the bottom of the test die bottom plate 1 by bolts, thereby connecting the bracket and the test die together, and controlling the test die to form a certain angle with the horizontal ground.

[0045] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A large-plate test mold for forming a shotcrete specimen, characterized in that: The test mold comprises a test mold and a bracket; the test mold comprises a rectangular bottom plate (1); a side plate (2) and a sealing plate (3) are arranged on one side of the bottom plate (1); two side plates (2) are arranged on two sides of the bottom plate (1) opposite to each other, and the side plates (2) are arranged perpendicular to the bottom plate (1); there is one sealing plate (3), which is arranged on one side of the bottom plate (1) and perpendicular to the bottom plate (1) and the side plates (2); the sealing plate (3) and the bottom plate (1) are fixedly connected by a first connecting member (4); the other side of the bottom plate (1) is connected to a bracket, and the bracket can support the test mold so that an angle is formed between the bottom plate (1) and a horizontal plane.

2. A large-plate test mold for forming a shotcrete specimen according to claim 1, characterized in that: The bracket comprises a U-shaped support (7); an open end of the U-shaped support (7) is fixedly connected to the bottom plate (1) on the open side of the test mold; a closed end of the U-shaped support (7) is connected to a plurality of telescopic rods (6); one end of the telescopic rod (6) is detachably connected to the bottom of the bottom plate (1).

3. A large-plate test mold for forming a shotcrete specimen according to claim 2, characterized in that: The U-shaped support (7) and the telescopic rod (6) are connected via a connecting support (8); the included angle is 80°±2°.

4. A large-plate test mold for forming a shotcrete specimen according to claim 2, characterized in that: The telescopic rod (6) comprises a sleeve (6-2) and a threaded rod (6-1); the sleeve (6-2) is sleeved outside the threaded rod (6-1); a plurality of circular holes are provided on the threaded rod (6-1), and a circular hole is provided on the sleeve (6-2) for adjusting the length of the telescopic rod (6) by fixing with bolts.

5. A large-plate test mold for forming a shotcrete specimen according to claim 2, characterized in that: A communicating hole (1-1) is provided at the bottom of the bottom plate (1) on the open side of the test mold, and an open end of the U-shaped support (7) is bolted to the bottom plate (1) via the communicating hole (1-1).

6. A large-plate test mold for forming a shotcrete specimen according to claim 2, characterized in that: A connecting mechanism (1-2) is provided at the bottom of the base plate (1); one end of the telescopic rod (6) is bolt-connected to the bottom of the base plate (1) via the connecting mechanism (1-2).

7. A large-plate test mold for forming a shotcrete specimen according to claim 1, characterized in that: The first connecting member (4) comprises a first sleeve (4-1) and a second sleeve (4-2); the second sleeve (4-2) is fixed to the two ends of the bottom of the sealing plate (3); the first sleeve (4-1) is fixed to one end of the top of the side plate (2), and the first sleeve (4-1) and the second sleeve (4-2) are coaxially arranged; the first sleeve (4-1) and the second sleeve (4-2) are connected via a first connecting rod (4-3).

8. A large-plate test mold for forming a shotcrete specimen according to claim 1 or 7, characterized in that: The side plate (2) is fixedly connected to the bottom plate (1) via a second connecting member (5).

9. A large-plate test mold for forming a shotcrete specimen according to claim 8, characterized in that: The second connecting member (5) comprises a third sleeve (5-1); the third sleeve (5-1) is arranged at the top and bottom of one end of the side plate (2), and the two third sleeves (5-1) are fixed by a second connecting rod (5-2); the third sleeve (5-1) is located on the open side of the test mold.

10. A large-plate test mold for forming a shotcrete specimen according to claim 9, characterized in that: Grooves are provided at the connection positions of the bottom plate (1) with the side plate (2) and the sealing plate (3); circular grooves are provided at the contact positions of the bottom plate (1) with the first connecting rod (4-3) and the second connecting rod (5-2); and threads are provided at the bottoms of the first connecting rod (4-3) and the second connecting rod (5-2) for connection with the circular grooves.

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