Auxiliary pressing device for concrete impermeability detection

Abstract

The utility model provides an auxiliary pressing device for detecting the impermeability of concrete. The auxiliary pressing device comprises a bottom plate, the lifting extrusion device is arranged on the bottom plate and is provided with a top lifting platform for placing a test block; the mounting plate is arranged above the bottom plate, and the center of the mounting plate is provided with a first center hole for the test block to pass through; the test block centering device is arranged on the bottom surface of the mounting plate; the test mold positioning plate is arranged above the mounting plate, and the center of the test mold positioning plate is provided with a second center hole for the test block to pass through; the plurality of positioning pieces are arranged around the second center hole on the top surface of the test mold positioning plate; and the top plate is arranged above the test mold positioning plate. According to the utility model, the operation difficulty and strength are greatly reduced, the coaxial press fit of the test block and the test mold is ensured, the sealing failure is prevented, and the accuracy of the detection result is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete detection, and particularly relates to an auxiliary pressing device for detecting the impermeability of concrete. Background Technique

[0002] The construction of water conservancy project infrastructure cannot do without the use of concrete. Different from other engineering facilities, water conservancy project facilities are mostly involved in water environments, such as diversion canals, artificial rivers, sluice gates, etc. Therefore, the impermeability detection of concrete is crucial.

[0003] The general process of concrete impermeability detection is as follows:

[0004] 1. Make concrete test blocks (the test blocks are frustum-shaped structures with a top diameter of 175 mm, a bottom diameter of 185 mm, and a height of 150 mm), and clean the surfaces of the cured test blocks.

[0005] 2. Select paraffin as the sealing material, and roll the side of the test block in the melted paraffin to form a sealing layer.

[0006] 3. Place the test block with the narrow end down into the preheated test mold, then turn the two over 180° and place them on the screw press to press until the bottom surface of the test block is flush with the bottom of the test mold. Release the pressure after the test mold cools down.

[0007] 4. Install the pressed test mold and test block on the impermeability detector for impermeability testing.

[0008] It can be seen from the above steps that during the process of manually loading the test mold after applying paraffin, if the two are offset, it will cause the edge of the test mold to scrape the paraffin coating on the surface of the test block, resulting in improper sealing and ultimately affecting the test results. In addition, the test block has to go through 4 handling operations and needs to be turned over before and after being loaded into the test mold, and the mass of the test block is about 10 kg, which brings a lot of inconvenience to the test work. Summary of the Invention

[0009] The purpose of the utility model is to provide an auxiliary pressing device for detecting the impermeability of concrete, which can reduce the number of times of manually moving the test block, reduce the working intensity, and at the same time can coaxial press the test block and the test mold, which is helpful to improve the accuracy of detection.

[0010] To achieve the above purpose, the utility model provides the following technical solution: an auxiliary pressing device for detecting the impermeability of concrete, comprising:

[0011] A bottom plate;

[0012] A lifting and pressing device, which is arranged on the bottom plate and has a top lifting platform for placing the test block;

[0013] An installation plate, which is arranged above the bottom plate and has a first central hole in the center thereof for the test block to pass through;

[0014] A test block centering device, which is arranged on the bottom surface of the installation plate;

[0015] A test mold positioning plate, which is arranged above the installation plate and has a second central hole in the center thereof for the test block to pass through;

[0016] Positioning members, which are arranged in plurality around the second central hole on the top surface of the test mold positioning plate;

[0017] A top plate, which is arranged above the test mold positioning plate.

[0018] Further, the test block centering device includes:

[0019] Sliders, which are symmetrically arranged on both sides of the first central hole and are slidably installed on horizontal optical axes through horizontal linear bearings;

[0020] Centering claws, which are arranged on the corresponding sliders and point to the center line of the first central hole;

[0021] A lead screw mechanism, the lead screw nut of which is connected to the corresponding slider through a connecting block;

[0022] A gear mechanism, the output end of which is connected to the lead screw of the lead screw mechanism;

[0023] A hand wheel, which is connected to the input end of the gear mechanism.

[0024] Further, the centering claw has a "V"-shaped claw head.

[0025] Further, the lead screw mechanism has two symmetrically arranged lead screws, and the thread directions of the two lead screws are opposite.

[0026] Further, the test mold positioning plate is slidably installed on a plurality of vertical optical axes on the installation plate through a plurality of vertical linear bearings, and springs for supporting the test mold positioning plate are sleeved on the outer periphery of the vertical optical axes.

[0027] Further, the lifting and squeezing device is a jack.

[0028] Further, an observation hole is arranged in the center of the top plate, and the diameter of the observation hole is smaller than the upper diameter of the test mold.

[0029] Further, the positioning member has a conical positioning head.

[0030] Further, a plurality of limit supports are arranged on the installation plate.

[0031] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model can directly place the test block on the top lifting table, directly apply sealing paraffin after centering operation, then press it against the positioned test mold by upward pressing, and finally take the two out and install them on the impermeability detector. The whole process only requires carrying the test block twice and does not require flipping, greatly reducing the operation difficulty and intensity, ensuring the coaxial pressing of the test block and the test mold, preventing sealing failure, and ensuring the accuracy of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a three-dimensional structure diagram of a preferred embodiment of the present utility model from a top-down perspective;

[0033] Figure 2 It is a three-dimensional structure diagram of a preferred embodiment of the present utility model from a bottom-up perspective;

[0034] Figure 3 is Figure 2 a partial enlarged view of part A in

[0035] Figure 4 is Figure 1 the front view of the structure of the shown embodiment;

[0036] Figure 5 is Figure 4 the sectional view of the structure in the A-A direction in

[0037] Figure 6 is Figure 1 the structural schematic diagram of the shown embodiment during the centering operation of the test block;

[0038] Figure 7 is Figure 1 the structural schematic diagram of the shown embodiment during the wax brushing operation of the test block;

[0039] Figure 8 is Figure 1 the structural schematic diagram of the shown embodiment during the positioning operation of the test mold;

[0040] Figure 9 is Figure 1 the structural schematic diagram of the shown embodiment during the pressing operation of the test mold;

[0041] Figure 10 is Figure 1 the structural schematic diagram of the shown embodiment after the lifting and squeezing device is reset. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. 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 protection scope of the present utility model.

[0043] As Figures 1 to 9 shown, this embodiment discloses an auxiliary pressing device for detecting the impermeability of concrete, which includes a bottom plate 1, a lifting and squeezing device 2, a mounting plate 3, a test block centering device, a test mold positioning plate 13, a positioning member 17 and a top plate 18.

[0044] The bottom plate 1 can be installed on any type of bracket or table for providing an installation foundation.

[0045] The lifting and squeezing device 2 is arranged on the bottom plate 1 and has a top lifting table 2.1 for placing a test block 200. The lifting and squeezing device 2 is selected as a manual lifting device, and a jack is selected in this example.

[0046] The mounting plate 3 is arranged above the bottom plate 1 and a first central hole 3.1 for the test block 200 to pass through is arranged in the center thereof. The distance between the mounting plate 3 and the bottom plate 1 should satisfy that when the lifting and squeezing device 2 is at the lowest position, the top lifting table 2.1 is at least 5 cm below the mounting plate 3.

[0047] The test block centering device is arranged on the bottom surface of the mounting plate 3. As a preferred example, the test block centering device includes sliders 8, centering claws 11, a lead screw mechanism 6, a gear mechanism 4 and a hand wheel 5.

[0048] Two sliders 8 are arranged and symmetrically arranged on both sides of the first central hole 3.1. On both sides of the first central hole 3.1 at the bottom of the mounting plate 3, a pair of horizontal optical axes 9 are respectively installed through optical axis seats, and the sliders 8 are slidably installed on the corresponding horizontal optical axes 9 through horizontal linear bearings to achieve horizontal sliding. The sliding direction of the slider 8 passes through the center line of the first central hole 3.1.

[0049] Two centering claws 11 are arranged and arranged on the corresponding sliders 8. The centering claws 11 have "V"-shaped claw heads, and the center line of the "V"-shaped claw heads points to the first central hole 3.1. After the "V"-shaped claw heads contact the test block 200, they drive its center to move to the center of the top lifting table 2.1 to achieve centering operation.

[0050] The lead screw mechanism 6 has two symmetrically arranged lead screws with opposite thread directions. The lead screw mechanism 6 is symmetrically arranged on one side of the first central hole 3.1. The lead screw nut of the lead screw mechanism 6 is connected to the corresponding slider 8 through the connecting block 7. The connecting hole 7 and the slider 8 are connected by the pressure plate 10 and screws for transmitting the driving force. Obviously, the lead screw of the lead screw mechanism 6 can also be one and a double-headed lead screw.

[0051] The gear mechanism 4 adopts a three-bevel gear mechanism, and its two coaxial bevel gears are used as output ends to be respectively connected to the corresponding lead screws, and the other bevel gear is used as the input end.

[0052] The handwheel 5 is connected to the input end of the gear mechanism 4. Rotating the handwheel 5 drives the gear mechanism 5 to work, and the power is evenly distributed to the two lead screws through the gear mechanism 5, and finally the synchronous movement of the two sliders 8 and the centering claw 11 is realized.

[0053] The test die positioning plate 13 is arranged above the mounting plate 3 and a second central hole 13.1 for the test block 200 to pass through is arranged in the center thereof. The distance between the test die positioning plate 13 and the mounting plate 3 should allow the test block 200 to be placed and the operation of brushing the sealing wax to be completed, so it should be not less than 25 cm.

[0054] A plurality of positioning members 17 are arranged on the top surface of the test die positioning plate 13 around the second central hole 13.1. The number and installation positions of the positioning members 17 are determined according to the number and positions of the flange mounting holes on the test die 100. For the test die 100, it belongs to an accessory of the impermeability detector, and the flange mounting holes provided on its flange are used for connection with the bolts on the impermeability detector. As a preferred example, the positioning member 17 has a conical positioning head. For the convenience of installation, a limiting step and a stud structure are arranged below the conical positioning head, so that it can be detachably installed in the mounting hole of the test die positioning plate 13. The functions of the test die positioning plate 13 and the positioning member 17 are to position the test die 100 to ensure that the positioned test die 13 and the centered test block 200 are in a coaxial state, so that when the two are pressed together, there will be no problem of scraping the sealing wax due to offset, ensuring the sealed pressing of the two.

[0055] The top plate 18 is arranged above the test die positioning plate 13. As a preferred example, the top plate 18, the mounting plate 3 and the bottom plate 1 can be fixedly connected by four vertical studs 16 passing through the four corners of the three.

[0056] As a preferred example, in order to reduce the height of the entire tooling, the mold trial positioning plate 13 can be installed movably. That is, the mold trial positioning plate 13 is slidably installed on four vertical optical axes 14 on the mounting plate 3 through four vertically linear bearings 20 fixed evenly along the circumference. A spring 15 for supporting the mold trial positioning plate 13 is sleeved on the outer periphery of the vertical optical axis 14. In the initial state, the mold trial positioning plate 13 is pushed up by the spring 15 to the highest position. At this time, the distance between the mold trial positioning plate 13 and the top plate 18 is less than the height of the test mold 100. When the test mold 100 is placed, the test mold 100 will squeeze the mold trial positioning plate 13 downward.

[0057] As a preferred example, in order to facilitate better observation of the fitting situation between the flange mounting hole and the positioning member 17 during the positioning of the test mold 100, an observation hole 18.1 is provided in the center of the top plate 18, and the diameter of the observation hole 18.1 is smaller than the upper diameter of the test mold 100.

[0058] As a preferred example, four limit supports 19 are provided on the mounting plate 3 and are evenly distributed along the circumferential direction. The function of the limit support 19 is that after the test mold 100 and the test block 200 are pressed together and the lifting and squeezing device 2 is reset to drive the mold trial positioning plate 13 to move downward, the mold trial positioning plate 13 will stop after contacting the limit support 19.

[0059] Working principle and process of the present utility model

[0060] As Figures 6 to 10 shown, first, place the cured and pretreated test block 200 on the top lifting table 2.1, and then rotate the handwheel 5 to control the centering claw 11 to move towards the center to adjust the test block 200 to the center-aligned state.

[0061] Next, operate the lifting and squeezing device 2 to raise the top lifting table 2.1 to a height not lower than that of the mounting plate 3. At this time, apply sealing wax to the side of the test block 200 with a brush or other tools. Then, press the mold trial positioning plate 13 downward with one hand, and place the test mold 100 between the mold trial positioning plate 13 and the top plate 18 with the other hand. Then, place the test mold 100 in place through the positioning member 17 to complete the positioning. At this time, the test block 200 and the test mold 100 are both in a coaxial state. Then, operate the lifting and squeezing device 2 again to raise the top lifting table 2.1 until the test block 200 and the test mold 100 are completely pressed together.

[0062] After the test mold 100 cools down, operate the lifting and squeezing device 2 to lower the top lifting table 2.1 to the initial height. During this process, the mold trial positioning plate 13 will stop after contacting the limit support 19, and the staff will take out the test mold 100 and the test block 200 together and place them on the impermeability detector.

[0063] As can be seen from the above process, the test block 200 only needs to be manually carried in the two links of being placed and taken away, and the whole process is completed with the top surface facing up all the time, and there is no need to turn the test block 200 anymore. Therefore, the operation is more convenient.

[0064] Where the present utility model is not described in detail shall be the well-known technology to those skilled in the art.

[0065] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are 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, as well as a specific orientation structure and operation. Therefore, it should not be construed as a limitation to the present utility model. In addition, "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0066] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more. In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0067] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit them. Although the present utility model has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified and equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model, and they should all be covered by the scope of the claims of the present utility model.

Claims

1. An auxiliary pressing device for testing concrete impermeability, characterized in that: include: Bottom plate (1); A lifting and extrusion device (2), which is arranged on the bottom plate (1) and has a top lifting platform (2.1) for placing a test block (200); A mounting plate (3) arranged above the bottom plate (1) and having a first central hole (3.1) at the center thereof for the test block (200) to pass through; A test block centering device, which is arranged on the bottom surface of the mounting plate (3); A test mold positioning plate (13), which is arranged above the mounting plate (3) and has a second center hole (13.1) at its center for the test block (200) to pass through; a plurality of positioning members (17) arranged on the top surface of the trial mold positioning plate (13) around the second center hole (13.1); A top plate (18) is arranged above the trial mold positioning plate (13).

2. The auxiliary pressing device for concrete impermeability testing according to claim 1, characterized in that: The test block centering device comprises: Slide blocks (8) are symmetrically arranged on both sides of the first central hole (3.1) and are slidably mounted on the horizontal optical axis (9) via horizontal linear bearings; A centering claw (11), which is arranged on the corresponding slider (8) and points to the center line of the first center hole (3.1); A screw mechanism (6), wherein the screw nut is connected to a corresponding slider (8) via a connecting block (7); A gear mechanism (4), the output end of which is connected to the screw of the screw mechanism (6); A hand wheel (5) is connected to the input end of the gear mechanism (4).

3. The auxiliary pressing device for concrete impermeability testing according to claim 2, characterized in that: The centering claw (11) has a "V"-shaped claw head.

4. The auxiliary pressing device for concrete impermeability testing according to claim 2, characterized in that: The screw mechanism (6) comprises two symmetrically arranged screws, and the thread directions of the two screws are opposite.

5. The auxiliary pressing device for concrete impermeability testing according to claim 1, characterized in that: The trial mold positioning plate (13) is slidably mounted on a plurality of vertical optical axes (14) on the mounting plate (3) via a plurality of vertical linear bearings (20); a spring (15) for supporting the trial mold positioning plate (13) is sleeved on the outer periphery of the vertical optical axis (14).

6. The auxiliary pressing device for concrete impermeability testing according to claim 1, characterized in that: The lifting and extruding device (2) is a jack.

7. The auxiliary pressing device for concrete impermeability testing according to claim 1, characterized in that: An observation hole (18.1) is provided at the centre of the top plate (18), and the diameter of the observation hole (18.1) is smaller than the upper diameter of the test mould (100).

8. The auxiliary pressing device for concrete impermeability testing according to claim 1, characterized in that: The positioning piece (17) has a conical positioning head.

9. The auxiliary pressing device for concrete impermeability testing according to claim 1, characterized in that: A plurality of position limiting supports (19) are arranged on the mounting plate (3).

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