Concrete core sample forming device

Abstract

The utility model relates to the technical field of concrete core sample forming, in particular to a concrete core sample forming device, which comprises two groups of half molds, two groups of outer molds and two groups of inner molds, the inner mold is arranged in the outer mold, a cavity is formed between the inner mold and the outer mold, and the cavity is used for forming a concrete core sample; the positioning device is arranged in the notch and is used for positioning the inner mold; the positioning device comprises two sets of limiting pieces, and each set of limiting pieces penetrate through the corresponding sliding way and are connected with the base in a sliding mode through the corresponding sliding way. The sides, away from each other, of the two limiting pieces are tightly attached to the inner wall of the notch. By operating the positioning device, the positioning device can enable the two sets of limiting pieces to move towards the outer side at the same time and stop after the two sets of limiting pieces make contact with the inner mold, at the moment, the inner mold is positioned in the middle of the outer mold, the situation that the inner mold is washed away when concrete grout is poured is avoided, and a formed concrete core sample meets the detection requirement.

Description

TECHNICAL FIELD

[0001] The utility model relates to concrete core sample forming technical field, concretely to a concrete core sample forming device. BACKGROUND

[0002] The impermeability of concrete is an extremely important durability index of concrete, especially for hydraulic structures, the impermeability directly relates to the normal use and safety degree of the building; before the impermeability detection, need to be shaped into the core sample of specified shape in advance to the concrete, and the core sample is detected to the impermeability, and need to use the concrete core sample forming device when shaping.

[0003] However, the existing concrete core sample forming device when using, the half mould of specified size is placed on the base, and the inner mould of specified size is placed into the half mould, and the concrete slurry is injected into the gap between the half mould and the inner mould, to obtain the concrete core sample of specified size, but because the inner mould and the half mould are not integral, and the pouring process of concrete slurry can produce impact force, easily lead to the movement of the inner mould, cannot position the core sample before pouring, lead to the core sample after shaping cannot use, inconvenient to use. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the inconvenient use problem of the existing concrete core sample forming device, which cannot position the core sample before pouring, leading to the core sample after shaping cannot use.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A concrete core sample forming device, comprising:

[0007] Two groups of half moulds, the two groups of half moulds are butted to form an outer mould;

[0008] An inner mould is arranged in the inside of the outer mould, and a forming cavity is formed between the inner mould and the outer mould, and the forming cavity is used for forming a concrete core sample; a notch is arranged in the inside of the inner mould;

[0009] A base is arranged below the half mould and the inner mould; two groups of slides are arranged in the position corresponding to the inner mould of the base;

[0010] A positioning device is arranged in the notch and is used for positioning the inner mould; the positioning device comprises: two groups of limiting pieces, each group of limiting pieces penetrates through the slide and is slidably connected with the base through the slide; and the side away from each other of the two groups of limiting pieces is tightly attached to the inner wall of the notch.

[0011] Preferably, the positioning device further comprises:

[0012] A bevel gear set is arranged inside the base, and the bevel gear set is composed of a first bevel gear and a second bevel gear, the edge of the first bevel gear is in meshing connection with the edge of the second bevel gear;

[0013] A rotating disc is arranged coaxially with the first bevel gear;

[0014] A threaded rod is arranged through the corresponding position of the base and is in rotational connection with the base, and the bottom end of the threaded rod is fixedly connected with the shaft center of the second bevel gear;

[0015] A moving block is arranged on the side close to the top end of the threaded rod and is in threaded connection with the threaded rod;

[0016] Two groups of moving members are symmetrically arranged on the two sides of the moving block and are fixedly connected with the moving block;

[0017] Four groups of connecting rods, one end of the two groups of connecting rods on the same side is in rotational connection with the side of the moving member away from the moving block, and the other end of the two groups of connecting rods on the same side is in rotational connection with the limiting member.

[0018] Preferably, the limiting member is composed of a vertical rod, a sliding block and a semi-cylindrical member, the side of the vertical rod away from the connecting rod is fixedly connected with the semi-cylindrical member, and the bottom end of the vertical rod is fixedly connected with the sliding block.

[0019] Preferably, the sealing device is arranged inside the base and is located directly below the chute for sealing the chute.

[0020] Preferably, the sealing device comprises:

[0021] Two groups of sealing members are arranged directly below the chute, and the outer diameter of the sealing member is slightly smaller than the inner diameter of the chute;

[0022] A moving plate is arranged below the sealing member and is fixedly connected with the sealing member;

[0023] An electric push rod, the output end of the electric push rod is fixedly connected with the lower end surface of the moving plate.

[0024] Preferably, a groove is formed in the upper end surface of the sealing member, and the inner diameter of the groove is slightly larger than the outer diameter of the sliding block.

[0025] Preferably, an arc-shaped groove is formed in the upper end surface of the base corresponding to the position of the cavity.

[0026] Preferably, the demolding device is arranged inside the base for ejecting the formed concrete core sample.

[0027] Preferably, the demolding device comprises:

[0028] Two groups of arc-shaped plates, each group of arc-shaped plates is arranged in the arc-shaped groove, and is slidably connected with the base through the arc-shaped groove;

[0029] Two groups of connecting plates, each group of connecting plates is arranged directly below the arc-shaped plate;

[0030] Two groups of elastic members, each group of elastic members is composed of a round rod, a horizontal plate and a spring, the round rod penetrates through the corresponding position of the horizontal plate and is slidably connected with the horizontal plate, the two ends of the round rod are fixedly connected with the arc-shaped plate and the connecting plate respectively, and the spring is arranged between the horizontal plate and the connecting plate and is sleeved on the surface of the round rod;

[0031] Two groups of wedge blocks, each group of wedge blocks is arranged above one end of the connecting plate, and a sliding rail is formed in the inclined surface of the wedge block;

[0032] Two groups of connecting parts, one end of each group of connecting parts is provided with a spherical ball, the spherical ball is arranged in the sliding rail and is slidably connected with the wedge block through the sliding rail;

[0033] Two groups of fixing parts, each group of fixing parts is arranged at the other end of the connecting part and is fixedly connected with the connecting part, and the side, away from the connecting part, of the fixing part is fixedly connected with the half mold;

[0034] A driving assembly is fixedly connected with the end of the connecting plate, away from the wedge block.

[0035] Preferably, the driving assembly comprises:

[0036] A groove plate, both ends of the groove plate are fixedly connected with the ends of the two groups of connecting plates, away from the wedge block, and the surface of the groove plate is provided with a sliding groove;

[0037] A cylindrical pin is arranged in the sliding groove and is slidably connected with the groove plate through the sliding groove;

[0038] A disc, one side edge of the disc is fixedly connected with the cylindrical pin;

[0039] A rotating wheel is fixedly connected with the axis of the disc.

[0040] The beneficial effects of the utility model lie in that: through the operation of the positioning device, the positioning device will make the two groups of limiting members move to the outside at the same time, and stop after the two groups of limiting members contact the inner mold, at this time, the inner mold is positioned in the middle position of the outer mold, so that the inner mold is not washed away when pouring the concrete slurry, and the formed concrete core sample meets the detection requirement. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1The utility model discloses a structure schematic diagram;

[0042] Figure 2 For Figure 1 The interior connecting structure main view sectional schematic diagram of in;

[0043] Figure 3 For Figure 1 The interior connecting structure rear view sectional schematic diagram of in;

[0044] Figure 4 For Figure 2 The interior connecting structure three-dimensional enlarged schematic diagram of in part;

[0045] Figure 5 For Figure 1 The interior connecting structure three-dimensional enlarged schematic diagram of in part;

[0046] Figure 6 For Figure 5 The interior connecting structure three-dimensional enlarged schematic diagram of in part;

[0047] Figure 7 For Figure 3 The interior connecting structure three-dimensional schematic diagram of in part

[0048] Figure 8 For Figure 4 The interior connecting structure three-dimensional enlarged schematic diagram of in part.

[0049] In the drawing: 1, half mould, 2, inner mould, 3, base, 4, bevel gear set, 5, carousel, 6, threaded rod, 7, moving block, 8, moving piece, 9, connecting rod, 10, limiting piece, 11, sealing element, 12, moving plate, 13, electric push rod, 14, arc plate, 15, elastic element, 16, connecting plate, 17, wedge block, 18, connecting portion, 19, fixed part, 20, groove plate, 21, cylindrical pin, 22, disc, 23, runner. DETAILED DESCRIPTION

[0050] The utility model will be further described in connection with the drawings:

[0051] The embodiment of the application:

[0052] Please refer to Figures 1-8 In the embodiment, the two groups of half moulds 1 butt joint to form an outer mould, the inner mould 2 is arranged inside the outer mould, and a forming cavity is formed between the inner mould 2 and the outer mould, and the forming cavity is used for forming a concrete core sample.

[0053] In the embodiment, the concrete slurry is injected into the forming cavity, and after being static for a period of time, the concrete is shaped, thereby forming a concrete core sample with a specified size.

[0054] In the embodiment, the concrete slurry is injected into the forming cavity, and after being static for a period of time, the concrete is shaped, thereby forming a concrete core sample with a specified size.

[0055] The inner mold 2 is internally provided with a gap; the base 3 is arranged below the half mold 1 and the inner mold 2; the base 3 is internally provided with two groups of sliding channels corresponding to the position of the inner mold 2; and the positioning device is arranged in the gap and used for positioning the inner mold 2.

[0056] In the embodiment, the positioning device can limit the position of the inner mold 2, so that the inner mold 2 is always located at the center of the outer mold, thereby avoiding the inner mold 2 from being washed away when pouring the concrete slurry, and making the formed concrete core sample meet the detection requirement.

[0057] The positioning device comprises two groups of limiting pieces 10, each group of limiting pieces 10 penetrates through the sliding channel and is in sliding connection with the base 3 through the sliding channel; and the sides, which are away from each other, of the two groups of limiting pieces 10 are tightly attached to the inner wall of the gap.

[0058] In the embodiment, the positioning device positions the inner mold 2 by moving the two groups of limiting pieces 10 outward at the same time.

[0059] As shown in Figure 3 and Figure 6 , the positioning device further comprises a bevel gear set 4, a rotating disc 5, a threaded rod 6, a moving block 7, two groups of moving pieces 8 and four groups of connecting rods 9.

[0060] Specifically, the bevel gear set 4 is arranged in the interior of the base 3, the bevel gear set 4 is composed of a first bevel gear and a second bevel gear, the edge of the first bevel gear is in meshing connection with the edge of the second bevel gear; and the rotating disc 5 is coaxially arranged with the first bevel gear.

[0061] In the embodiment, the rotating disc 5 can drive the bevel gear set 4 to rotate synchronously by rotating the rotating disc 5, and the bevel gear set 4 is used for changing the transmission direction.

[0062] The threaded rod 6 penetrates through the corresponding position of the base 3 and is in rotational connection with the base 3; the bottom end of the threaded rod 6 is fixedly connected with the shaft center of the second bevel gear; and the moving block 7 is arranged on the side close to the top end of the threaded rod 6 and is in threaded connection with the threaded rod 6.

[0063] In the embodiment, the threaded rod 6 will make the moving block 7 move vertically when the bevel gear set 4 rotates.

[0064] The two groups of moving pieces 8 are symmetrically arranged on the two sides of the moving block 7 and are fixedly connected with the moving block 7; one end of the two groups of connecting rods 9 on the same side is in rotational connection with the side, which is away from the moving block 7, of the moving piece 8, and the other end of the two groups of connecting rods 9 on the same side is in rotational connection with the limiting piece 10.

[0065] In this embodiment, the moving block 7 drives the moving piece 8 to move vertically, and when the moving piece 8 moves vertically downward, the connecting rod 9 is slightly rotated in the direction in which the moving piece 8 moves, and the limiting piece 10 is pushed to move horizontally.

[0066] As shown in Figure 6 , the limiting piece 10 is composed of a vertical rod, a sliding block and a semi-cylindrical piece, the side of the vertical rod away from the connecting rod 9 is fixedly connected with the semi-cylindrical piece; the bottom end of the vertical rod is fixedly connected with the sliding block.

[0067] In this embodiment, the base 3 can limit the sliding block to move horizontally through the slide, and the sliding block is prevented from moving vertically through the protrusions arranged at the contact position of the sliding block and the slide; since the contact positions of the semi-cylindrical piece and the notch are both arc surfaces, the contact positions are linear contact, and the positioning accuracy can be improved.

[0068] When the inner mold 2 needs to be positioned, the inner mold 2 is first placed into the outer mold, and the rotating disc 5 is rotated, the rotating disc 5 drives the threaded rod 6 to rotate through the bevel gear set 4; the moving block 7 moves vertically downward; the moving block 7 drives the moving piece 8 to move, the moving piece 8 slightly rotates the connecting rod 9 in the direction in which the moving piece 8 moves, and pushes the limiting piece 10 to move horizontally away from the threaded rod 6, and stops after the two groups of limiting pieces 10 contact with the inner mold 2, at this time, the inner mold 2 is positioned in the middle position of the outer mold, and the inner mold 2 is prevented from being washed away when the concrete paste is poured, so that the formed concrete core sample meets the detection requirements.

[0069] After the positioning is completed, part of the concrete paste enters the slide, thereby causing leakage.

[0070] To solve the above problems, an embodiment is provided in the present embodiment, and the concrete core sample forming device further comprises a sealing device; the sealing device is arranged inside the base 3 and located directly below the slide, and is used for sealing the slide.

[0071] In this embodiment, as shown in Figure 8 , the sealing device comprises two groups of sealing pieces 11, a moving plate 12 and an electric push rod 13.

[0072] Among them, the two groups of sealing pieces 11 are arranged directly below the slide, and the outer diameter of the sealing piece 11 is slightly smaller than the inner diameter of the slide.

[0073] In this embodiment, after the positioning is completed, the slide is blocked by inserting the sealing piece 11 into the slide, so as to prevent the concrete paste from leaking.

[0074] The moving plate 12 is arranged below the sealing piece 11 and is fixedly connected with the sealing piece 11; the output end of the electric push rod 13 is fixedly connected with the lower end surface of the moving plate 12.

[0075] In this embodiment, the model of the electric push rod 13 meets the working conditions according to actual needs; the electric push rod 13 is driven to move, so that the output end of the electric push rod 13 simultaneously pushes the moving plate 12 and the sealing element 11 to move vertically, thereby sealing.

[0076] As shown in Figure 8 , the upper end surface of the sealing element 11 is provided with a groove, and the inner diameter of the groove is slightly larger than the outer diameter of the sliding block.

[0077] In this embodiment, since the size of the inner mold 2 is fixed, the position of the sliding block after positioning each time is unchanged, and the groove on the sealing element 11 can wrap the sliding block, so that the sliding block does not hinder the vertical movement of the sealing element 11.

[0078] As shown in Figure 5 , the upper end surface of the base 3 is provided with an arc-shaped groove corresponding to the position of the cavity.

[0079] Since the shape of the outer mold is a hollow circular truncated cone shape with a lower thick and an upper thin, the formed concrete core sample is also a hollow circular truncated cone shape with a lower thick and an upper thin, which causes the outer mold to hinder the demolding, and the outer mold and the inner mold need to be flipped before demolding, which is relatively inconvenient.

[0080] To solve the above problems, an embodiment is provided in this embodiment, and the concrete core sample forming device further comprises: a demolding device; the demolding device is arranged inside the base 3 and is used for ejecting the formed concrete core sample.

[0081] In this embodiment, as shown in Figure 2 and Figure 4 , the demolding device comprises: two groups of arc-shaped plates 14, two groups of connecting plates 16, two groups of elastic elements 15, two groups of wedge blocks 17, two groups of connecting parts 18, two groups of fixing parts 19 and a driving assembly.

[0082] Specifically, each group of arc-shaped plates 14 is arranged in the arc-shaped groove and is in sliding connection with the base 3 through the arc-shaped groove.

[0083] In this embodiment, the arc-shaped plate 14 can move vertically along the arc-shaped groove, and the arc-shaped plate 14 also blocks the arc-shaped groove to avoid leakage of concrete slurry.

[0084] The two groups of connecting plates 16 are arranged directly below the arc-shaped plate 14; each group of elastic elements 15 is composed of a round rod, a horizontal plate and a spring, the round rod penetrates through the corresponding position of the horizontal plate and is in sliding connection with the horizontal plate; the two ends of the round rod are fixedly connected with the arc-shaped plate 14 and the connecting plate 16 respectively; the spring is arranged between the horizontal plate and the connecting plate 16 and is sleeved on the surface of the round rod.

[0085] In this embodiment, when the connecting plate 16 moves upward, the spring is compressed.

[0086] Each group of wedge blocks 17 is arranged above one end of the connecting plate 16; an inclined surface of the wedge block 17 is provided with a sliding rail; one end of each group of connecting parts 18 is provided with a ball, which is arranged in the sliding rail and is in sliding connection with the wedge block 17 through the sliding rail.

[0087] In the embodiment, the connecting plate 16 drives the wedge block 17 to move synchronously, and the wedge block 17 drives the connecting part 18 to move horizontally through the sliding between the sliding rail and the ball.

[0088] Each group of fixed parts 19 is arranged at the other end of the connecting part 18 and is in fixed connection with the connecting part 18; one side of the fixed part 19, which is away from the connecting part 18, is in fixed connection with the half mold 1.

[0089] In the embodiment, the connecting part 18 drives the half mold 1 to move, so that the two groups of half molds 1 are in butt joint or separation; the butt joint is used for molding, and the separation is used for demolding.

[0090] The driving assembly is in fixed connection with one end of the connecting plate 16, which is away from the wedge block 17.

[0091] In the embodiment, the driving assembly drives the connecting plate 16 to move vertically.

[0092] When demolding is needed, the driving assembly is operated to drive the connecting plate 16 to move vertically upward, the connecting plate 16 drives the wedge block 17 to move, the wedge block 17 drives the connecting part 18 to move horizontally outward through the sliding between the sliding rail and the ball, the connecting part 18 drives the half mold 1 to move, and the two groups of half molds 1 are separated; in the process, the connecting plate 16 drives the arc-shaped plate 14 to move upward through the elastic element 15, the arc-shaped plate 14 ejects the molded concrete core sample, so that the concrete core sample is separated from the inner mold 2, and demolding is realized.

[0093] In the embodiment, as shown in Figure 4 and Figure 7 , the driving assembly comprises a groove plate 20, a cylindrical pin 21, a disc 22 and a rotating wheel 23.

[0094] The two ends of the groove plate 20 are in fixed connection with one end of the two groups of connecting plates 16, which is away from the wedge block 17.

[0095] In the embodiment, the groove plate 20 drives the connecting plate 16 to move synchronously.

[0096] The surface of the groove plate 20 is provided with a sliding groove; the cylindrical pin 21 is arranged in the sliding groove and is in sliding connection with the groove plate 20 through the sliding groove.

[0097] In the embodiment, when the cylindrical pin 21 does circular motion, the groove plate 20 moves vertically through the sliding between the sliding groove.

[0098] One side edge of the disc 22 is fixedly connected with the cylindrical pin 21; the rotating wheel 23 is fixedly connected with the axis of the disc 22.

[0099] In this embodiment, the disc 22 is driven to rotate by rotating the rotating wheel 23, and the disc 22 simultaneously drives the cylindrical pin 21 to rotate circumferentially around the axis of the disc 22.

[0100] When the driving assembly needs to be operated, the disc 22 is driven to rotate by rotating the rotating wheel 23, and the disc 22 simultaneously drives the cylindrical pin 21 to rotate circumferentially, and the cylindrical pin 21 drives the groove plate 20 to move vertically by sliding with the sliding groove, and the groove plate 20 drives the connecting plate 16 to move synchronously.

[0101] Working principle:

[0102] When the concrete core sample forming device is used, the user places the inner mold 2 into the outer mold formed by the two groups of half molds 1, and rotates the rotating disc 5, and the rotating disc 5 drives the threaded rod 6 to rotate through the bevel gear set 4; the threaded rod 6 drives the moving block 7 to move vertically downward; the moving block 7 simultaneously drives the moving piece 8 to move, and the moving piece 8 drives the connecting rod 9 to rotate slightly in the direction in which the moving piece 8 moves, and pushes the limiting piece 10 to move horizontally away from the threaded rod 6; after the two groups of limiting pieces 10 are in contact with the inner mold 2, the movement is stopped, at this time, the inner mold 2 is positioned in the middle position of the outer mold, avoiding the inner mold 2 from being washed away when pouring the concrete slurry, so that the formed concrete core sample meets the detection requirements.

[0103] Then, the electric push rod 13 is adjusted, so that the output end of the electric push rod 13 pushes the moving plate 12 and the sealing piece 11 to move vertically upward; since the size of the inner mold 2 is fixed, the position of the sliding block after positioning each time is unchanged, and the groove on the sealing piece 11 can wrap the sliding block, so that the sliding block does not hinder the vertical movement of the sealing piece 11, thereby achieving sealing.

[0104] After forming, the disc 22 is driven to rotate by rotating the rotating wheel 23, and the disc 22 simultaneously drives the cylindrical pin 21 to rotate circumferentially, and the cylindrical pin 21 drives the groove plate 20 to move vertically by sliding with the sliding groove, and the groove plate 20 drives the connecting plate 16 to move synchronously; the connecting plate 16 simultaneously drives the wedge block 17 to move, and the wedge block 17 can push the connecting part 18 to move horizontally outward by sliding between the sliding rail and the spherical ball, the connecting part 18 drives the half mold 1 to move, and the two groups of half molds 1 are separated; in this process, the connecting plate 16 also pushes the arc-shaped plate 14 to move upward through the elastic piece 15, and the arc-shaped plate 14 pushes out the formed concrete core sample, so that the concrete core sample is separated from the inner mold 2, achieving demolding, facilitating use, and completing the use of the device this time.

[0105] Although the utility model has carried on the illustration and the description through the reference preferred embodiment, but, the professional ordinary skilled person should understand, can make various changes in form and detail in the scope of claims.

Claims

1. A concrete core sample forming apparatus, characterized by: The utility model relates to a concrete core sample forming device, including: Two groups of half moulds (1), two groups the half mould (1) butt joint form outer mould; Inner mould (2) are set up in the inside of outer mould, and the inner mould (2) is formed with the outer mould between the cavity, the cavity is used to form concrete core sample, the inside of inner mould (2) is opened with the gap; Base (3) are set up in the below of half mould (1) and inner mould (2), the base (3) are opened with two groups of slide way corresponding the position of inner mould (2), Positioning device is set up in the gap, is used for positioning inner mould (2), the positioning device includes: two groups of limit piece (10), each group of limit piece (10) is through the slide way, and is connected with base (3) through the slide way slidingly, two groups the limit piece (10) the side away from each other with the inner wall of gap closely.

2. The concrete core sample forming apparatus of claim 1, wherein: The positioning device further includes: Bevel gear set (4) are set up in the inside of base (3), bevel gear set (4) are composed of first bevel gear and second bevel gear, the edge of first bevel gear is engaged with the edge of second bevel gear and is connected; Rotating disc (5), rotating disc (5) are coaxial with first bevel gear and set up; Threaded rod (6) are through the corresponding position of base (3), and are rotatably connected with base (3), the bottom end of threaded rod (6) is fixedly connected with the axle of second bevel gear; Moving block (7) are set up in the side close to the top end of threaded rod (6), and are threadedly connected with threaded rod (6); Two groups of moving piece (8) are symmetrically set up in the both sides of moving block (7), and are fixedly connected with moving block (7); Four groups of connecting rod (9) are rotatably connected with moving piece (8) on the side away from moving block (7) on one end of two groups of connecting rod (9) of the same side, and are rotatably connected with limit piece (10) on the other end of two groups of connecting rod (9) of the same side.

3. The concrete core sample forming apparatus of claim 2, wherein: The limit piece (10) is composed of a vertical rod, a sliding block, and a half-cylinder piece. The vertical rod is fixedly connected to the half-cylinder piece on the side away from the connecting rod (9). The bottom end of the vertical rod is fixedly connected to the sliding block.

4. The concrete core sample forming apparatus of claim 3, wherein: Further including: Sealing device, the sealing device is set up in the inside of base (3), and is located directly below the slide way, is used for sealing the slide way.

5. The concrete core sample forming apparatus of claim 4, wherein: The sealing device includes: Two groups of sealing pieces (11) are set up directly below the slide way, and the outer diameter of the sealing piece (11) is slightly smaller than the inner diameter of the slide way; Moving plate (12) are set up below sealing piece (11), and are fixedly connected with sealing piece (11); Electric push rod (13), the output end of electric push rod (13) is fixedly connected with the lower end surface of moving plate (12).

6. The concrete core sample forming apparatus of claim 5, wherein: The upper end surface of the sealing piece (11) is provided with a groove, and the inner diameter of the groove is slightly larger than the outer diameter of the sliding block.

7. The concrete core sample forming apparatus of claim 1, wherein: The base (3) upper end surface corresponding the position of cavity is opened with arc slot.

8. The concrete core sample forming apparatus of claim 7, wherein: Further including: Demolding device, the demolding device is set up in the inside of base (3), is used for ejecting the concrete core sample after forming.

9. The concrete core sample forming apparatus of claim 8, wherein: The demolding device includes: Two groups of arc-shaped plates (14) are arranged in the arc-shaped groove and are in sliding connection with the base (3) through the arc-shaped groove; Two groups of connecting plates (16) are arranged directly below the arc-shaped plates (14); Two groups of elastic members (15) are composed of a round rod, a horizontal plate and a spring, the round rod penetrates through the corresponding position of the horizontal plate and is in sliding connection with the horizontal plate, the two ends of the round rod are fixedly connected with the arc-shaped plate (14) and the connecting plate (16) respectively, and the spring is arranged between the horizontal plate and the connecting plate (16) and is sleeved on the surface of the round rod; Two groups of wedge blocks (17) are arranged above one end of the connecting plate (16), and a sliding rail is arranged on the inclined surface of the wedge block (17); Two groups of connecting parts (18) are provided with a spherical ball at one end, the spherical ball is arranged in the sliding rail and is in sliding connection with the wedge block (17) through the sliding rail; Two groups of fixing parts (19) are arranged at the other end of the connecting part (18) and are fixedly connected with the connecting part (18), and the side, away from the connecting part (18), of the fixing part (19) is fixedly connected with the half mold (1); A driving assembly is fixedly connected with the other end of the connecting plate (16) away from the wedge block (17).

10. The concrete core sample forming apparatus of claim 9, wherein: The driving assembly comprises: A groove plate (20) is fixedly connected with the other end of the two groups of connecting plates (16) away from the wedge block (17), and a sliding groove is arranged on the surface of the groove plate (20); A cylindrical pin (21) is arranged in the sliding groove and is in sliding connection with the groove plate (20) through the sliding groove; A disc (22) is fixedly connected with the cylindrical pin (21) at one side edge; A rotating wheel (23) is fixedly connected with the shaft center of the disc (22).

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