Sample cutting device for EVA waterproof board detection

Abstract

The utility model discloses a sample cutting device for EVA waterproof plate detection, which comprises a bottom plate, a positioning plate is covered on the bottom plate, and a plurality of shaped holes are arranged on the positioning plate; positioning columns protrude from four corners of the upper surface of the positioning plate; the vertical column is arranged beside the bottom plate, a supporting plate facing the position over the positioning plate is arranged at the top of the vertical column, a hydraulic oil cylinder is fixed to the supporting plate and penetrates through the supporting plate to be connected to a cutter plate, and a plurality of cutter blades protrude downwards from the lower surface of the cutter plate; positioning holes are further formed in the four corners of the cutter plate and correspond to the positioning columns on the upper surface of the positioning plate in a one-to-one mode. The hydraulic oil tank drives the hydraulic oil cylinder to work through an oil feeding pipe, an oil returning pipe and a hydraulic motor. Various specifications, sizes and numbers of samples required by all tests of the EVA waterproof board can be cut at a time, the samples are cut through pressure, stress is even, and the situation that the samples are cut irregularly due to unbalanced stress is reduced.

Description

Technical Field

[0001] The utility model relates to the field of waterproof board performance detection, in particular to a sample cutting device for EVA waterproof board detection. Background Art

[0002] Waterproof board is an anti-seepage material made of high molecular polymer as the basic raw material. It can prevent liquid leakage and gas volatilization. It is widely used in construction, transportation, subway, tunnel, and engineering construction. Waterproof board is also called geomembrane. Geomembrane with a thickness of 0.8mm or more is usually called waterproof board. It is an anti-seepage material made of high molecular polymer as the basic raw material. It is divided into homogeneous waterproof board and composite waterproof board.

[0003] EVA waterproof board is a rubber-plastic product with the advantages of good cushioning, earthquake resistance, heat insulation, moisture resistance, chemical corrosion resistance, etc. It is non-toxic and non-absorbent. It has simple construction technology, good operability, strong repairability, and low requirements for the construction environment. It is particularly suitable for construction in narrow spaces such as tunnels and pipelines, as well as in environments with poor ventilation and water seepage.

[0004] Sample cutting means that the waterproof board needs to be cut to the size required by the specification before testing the performance indicators of the waterproof board. The traditional manual cutting method is affected by the technical level and efficiency of the cutters, and the cutting speed is slow and the efficiency is low. In addition, the samples cut by different people from the same sample may be affected by the cutting angle of the cutting tool, resulting in the edge of the sample being tilted instead of vertical, which makes the test results vary greatly, leading to inaccurate subsequent test results and reducing the test efficiency. Utility Model Content

[0005] The technical problem solved by the utility model is that the traditional manual cutting method is affected by the technical level and efficiency of the cutters, the cutting speed is slow, the efficiency is low, and the test results of the same sample cut by different people vary greatly, resulting in inaccurate subsequent test results and reducing the test efficiency.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a sample cutting device for EVA waterproof board testing, comprising a bottom plate, a positioning plate is provided on the top of the bottom plate, and a plurality of shaped holes are opened on the positioning plate; positioning columns are protruded from the four corners of the upper surface of the positioning plate;

[0007] It also includes a column arranged beside the bottom plate, a support plate facing directly above the positioning plate is arranged on the top of the column, a hydraulic cylinder is fixed vertically downward on the upper surface of the support plate, a piston end of the hydraulic cylinder penetrates the support plate and is connected to a cutting plate, a plurality of cutting blades corresponding to the shape and position of the shaped hole protrude downward from the lower surface of the cutting plate; positioning holes are also arranged at the four corners of the cutting plate, and the positioning holes correspond to the positioning columns on the upper surface of the positioning plate one by one;

[0008] It also includes a hydraulic oil tank, which drives the hydraulic cylinder to operate through an oil supply pipe, an oil return pipe and a hydraulic motor.

[0009] Furthermore, at least three holes of a single shape are provided on the positioning plate.

[0010] In particular, the bottom plate includes a rubber buffer layer at the bottom and a mild steel layer at the top.

[0011] Furthermore, a placement groove for placing the EVA waterproof board is opened on the upper surface of the bottom plate, and the rubber buffer layer and the soft steel layer are located at the bottom of the placement groove.

[0012] Particularly, a lifting handle is provided on the upper surface of the cutting blade.

[0013] Compared with the prior art, the utility model has the following advantages and beneficial effects: the utility model can meet the requirements of various specifications, sizes and quantities of samples required for all tests of EVA waterproof boards through multiple cutting; the samples are cut by pressure, the force is evenly distributed, and the situation of irregular sample cutting caused by uneven force is reduced. At the same time, it can also effectively speed up the cutting speed and improve the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the device of the utility model.

[0015] Figure 2 It is a schematic diagram of the top view structure of the positioning plate.

[0016] Figure 3 Schematic diagram of the bottom structure of the cutting plate.

[0017] The meanings of the numbers in the figure are: bottom plate—1; rubber buffer layer—101; soft steel layer—102; positioning plate—2; shaped hole—3; column—4; support plate—5; hydraulic cylinder—6; cutting plate—7; cutting blade—8; positioning hole—9; positioning column—10; hydraulic oil tank—11; hydraulic motor—12; lifting handle—13. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the accompanying drawings in the embodiments of the utility model, so as to have a further understanding of the concept of the utility model, the technical problems solved, the technical features constituting the technical solutions and the technical effects brought about.

[0019] like Figure 1 to Figure 3 The sample cutting device for testing EVA waterproof board shown in the figure comprises a bottom plate 1, a positioning plate 2 is provided on the bottom plate 1, a plurality of holes 3 are opened on the positioning plate 2, and positioning columns 10 are protruded from the four corners of the upper surface of the positioning plate 2;

[0020] It also includes a column 4 arranged beside the bottom plate 1, a support plate 5 facing directly above the positioning plate 2 is arranged on the top of the column 4, a hydraulic cylinder 6 vertically downward is fixed on the upper surface of the support plate 5, the piston end of the hydraulic cylinder 6 penetrates the support plate 5 and is connected to a cutting plate 7, and a plurality of cutting blades 8 corresponding to the shape and position of the shaped hole 3 are protruded downward from the lower surface of the cutting plate 7; positioning holes 9 are also arranged at the four corners of the cutting plate 7, and the positioning holes 9 correspond to the positioning columns 10 on the upper surface of the positioning plate 2 one by one;

[0021] It also includes a hydraulic oil tank 11, which drives the hydraulic cylinder 6 to operate through an oil supply pipe, an oil return pipe and a hydraulic motor 12.

[0022] During the actual use of the present invention, the device is placed flat on the operating table, the EVA waterproof board to be cut is taken, and the EVA waterproof board is observed to see if there are any defects, and then spread flat, the positioning plate 2 is placed at the cutting position below the support plate 5, and the hydraulic cylinder 6 is started to drive the cutting plate 7 to move slowly downward. During this process, it is necessary to observe whether the positioning plate 2 is parallel to the cutting plate 7, and whether the cutting plate 7 descends smoothly; after the hydraulic cylinder 6 is sent down to the farthest stroke, the oil return switch is turned on, the cutting plate 7 is lifted, and then the positioning plate 2 is removed, the cut sample is marked according to the use requirements, and the measured dimensions are checked to see if they meet the standard error requirements, and the cutting process is completed.

[0023] As a preferred embodiment, the shaped holes 3 include A, B, C, D, E, F, G, H, I, K, L, M, N, and S shaped holes, wherein:

[0024] Type A holes are used for cutting water-impermeability test profiles; Type B holes are used for cutting room temperature tensile test profiles; Type C holes are used for cutting tear strength test profiles; Type D holes are used for cutting high temperature tensile test profiles; Type E holes are used for cutting low temperature tensile test profiles; Type F holes are used for cutting heating expansion test profiles; Type G holes are used for cutting hot air aging test profiles; Type H holes are used for cutting artificial climate aging test profiles; Type I holes are used for cutting alkali resistance test profiles; Type K holes are used for cutting strength test profiles; Type L holes are used for cutting ozone aging test profiles; Type M holes are used for cutting adhesive peel strength test profiles under standard test profile cutting conditions; Type N holes are used for cutting adhesive peel strength test profiles under 168h immersion conditions; Type S holes are used for cutting low temperature bending test profiles.

[0025] In this embodiment, the size of the A-type hole is 142mm*142mm square, which is used to cut 140mm*140mm samples for water-tightness test. The size of the B-type hole is 115mm long, 25mm wide at the end, 33mm long at the narrow end, 6mm wide at the narrow end, 14mm outer radius, 25mm inner transition radius in dumbbell shape, which is used to cut 117mm long, 27mm wide at the end, 33mm long at the narrow end, 8mm wide at the narrow end, 14mm outer radius, 25mm inner transition radius in dumbbell shape, which is used for room temperature tensile test. The C-shaped hole size is 102mm long, 21mm wide, 19mm upper right angle chamfer radius, 12.7mm lower arc right angle, and 25.4mm lower chamfer radius. It is used to cut 100mm long, 19mm wide, 19mm upper right angle chamfer radius, 12.7mm lower arc right angle, and 25.4mm lower chamfer radius. It is used for tear strength test. The D-shaped hole size is 115mm long, 25mm end width, 33mm narrow length, 6mm narrow width, 14mm outer radius, and 25mm inner transition radius. It is dumbbell-shaped and used to cut 117mm long, 27mm end width, 33mm narrow length, 8mm narrow width, 14mm outer radius, and 25mm inner transition radius. It is used for high temperature tensile test. The size of the E-type hole is 115mm long, 25mm wide at the end, 33mm narrow length, 6mm narrow width, 14mm outer radius, 25mm inner transition radius, dumbbell-shaped, used to cut 117mm long, 27mm wide at the end, 33mm narrow length, 8mm narrow width, 14mm outer radius, 25mm inner transition radius, dumbbell-shaped specimens for low-temperature tensile tests. The size of the F-type hole is 302mm long, 32mm wide, rectangular, used to cut 300mm long, 30mm wide rectangular specimens for heating expansion test. The size of the G-type hole is 115mm long, 25mm wide at the end, 33mm narrow length, 6mm narrow width, 14mm outer radius, 25mm inner transition radius, dumbbell-shaped, used to cut 117mm long, 27mm wide at the end, 33mm narrow length, 8mm narrow width, 14mm outer radius, 25mm inner transition radius, dumbbell-shaped specimens for hot air aging test. The dimensions of the H-shaped hole are 115mm long, 25mm end width, 33mm narrow length, 6mm narrow width, 14mm outer radius, 25mm inner transition radius, and dumbbell shape. It is used to cut dumbbell-shaped specimens with a length of 117mm, an end width of 27mm, a narrow length of 33mm, a narrow width of 8mm, an outer radius of 14mm, and an inner transition radius of 25mm for artificial climate aging tests.The size of the I-type hole is 115mm long, 25mm wide at the end, 33mm narrow length, 6mm narrow width, 14mm outer radius, 25mm inner transition radius, dumbbell-shaped, used to cut 117mm long, 27mm wide at the end, 33mm narrow length, 8mm narrow width, 14mm outer radius, 25mm inner transition radius, dumbbell-shaped specimens for alkali resistance test. The size of the K-type hole is 52mm long, 52mm wide, square-shaped, used to cut 50mm long, 50mm wide square-shaped specimens for strength test. The size of the L-type hole is 115mm long, 25mm wide at the end, 33mm narrow length, 6mm narrow width, 14mm outer radius, 25mm inner transition radius, dumbbell-shaped, used to cut 117mm long, 27mm wide at the end, 33mm narrow length, 8mm narrow width, 14mm outer radius, 25mm inner transition radius, dumbbell-shaped specimens for ozone aging test. The M-type hole size is 202mm long and 152mm wide in a rectangular shape. It is used to cut 200mm long and 150mm wide rectangular specimens for the bond peel strength (standard test conditions) test. The N-type hole size is 202mm long and 152mm wide in a rectangular shape. It is used to cut 200mm long and 150mm wide rectangular specimens for the bond peel strength (immersion in water for 168h) test. The S-type hole size is 52mm long and 52mm wide in a square shape. It is used to cut 50mm long and 50mm wide square specimens for the strength test.

[0026] As a further embodiment, at least three single-shaped holes 3 are provided on the positioning plate 2 .

[0027] In this embodiment, a plurality of single-shaped holes 3 are provided on the two positioning plates to meet the need of obtaining a plurality of cut samples in a single cutting, thereby obtaining the number of samples that meet the experimental needs at one time and speeding up the test.

[0028] As a preferred embodiment, the bottom plate 1 includes a rubber buffer layer 101 at the bottom and a soft steel layer 102 at the top.

[0029] In this embodiment, the soft steel layer 102 is made of a special soft steel with a length of 1200mm, a width of 1200mm and a thickness of 5mm, and has a cubic structure. The surface of the soft steel material has a certain rigidity, but it cannot cause damage to the cutting blade, and can transfer the impact load to the lower buffer layer. The rubber buffer layer 101 is made of a hard plastic rubber with a length of 1200mm, a width of 1200mm and a thickness of 10mm, and has a cubic structure. The top surface is bonded to the soft steel with high-strength glue to transfer and buffer the impact load during the cutting process.

[0030] As a further embodiment, a placement groove for placing the EVA waterproof board is opened on the upper surface of the bottom plate 1, and the rubber buffer layer 101 and the soft steel layer 102 are located at the bottom of the placement groove.

[0031] In this embodiment, a placement groove having the same shape as the EVA waterproof board to be cut is provided to fix the position of the EVA waterproof board in the initial state, thereby preventing the EVA waterproof board from sliding or shifting before the positioning plate 2 is installed, resulting in waste of the cut sample.

[0032] As a preferred embodiment, a lifting handle 13 is provided on the upper surface of the cutting plate 7 .

[0033] In this embodiment, a 40mm diameter hollow steel pipe is used to form a U-shape with a length of 800mm. The two ends are longitudinally welded to the positioning plate 2 and symmetrically welded in the longitudinal direction of the positioning plate 2. On the one hand, it can assist in lifting the cutting plate 7, and on the other hand, it can also serve as a direction indicator.

[0034] The words “connection” and “fixation” appearing in the description of the present invention may refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meanings of the above terms in the present invention shall be understood according to the specific circumstances.

[0035] In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., which indicate the orientation or position relationship, are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying a specific orientation that the device or element referred to must have, and therefore cannot be understood as a limitation on the present invention.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A sample cutting device for EVA waterproof board testing, characterized in that: It comprises a bottom plate (1), the top cover of the bottom plate (1) is provided with a positioning plate (2), the positioning plate (2) is provided with a plurality of shaped holes (3), and positioning columns (10) are protruding from the four corners of the upper surface of the positioning plate (2); It also includes a column (4) arranged beside the bottom plate (1), the top of the column (4) is provided with a support plate (5) facing directly above the positioning plate (2), the upper surface of the support plate (5) is fixed with a hydraulic cylinder (6) pointing vertically downward, the piston end of the hydraulic cylinder (6) passes through the support plate (5) and is connected to a cutting plate (7), and the lower surface of the cutting plate (7) protrudes downward with a plurality of cutting blades (8) corresponding in shape and position to the shaped holes (3); the cutting plate (7) is also provided with positioning holes (9) at the four corners, and the positioning holes (9) correspond one-to-one to the positioning columns (10) on the upper surface of the positioning plate (2); It also includes a hydraulic oil tank (11), wherein the hydraulic oil tank (11) drives the hydraulic oil cylinder (6) to operate via an oil supply pipe, an oil return pipe and a hydraulic motor (12).

2. A sample cutting device for EVA waterproof board testing as claimed in claim 1, characterized in that: At least three single-shaped holes (3) are provided on the positioning plate (2).

3. The sample cutting device for EVA waterproof board testing as claimed in claim 1, characterized in that: The bottom plate (1) comprises a rubber buffer layer (101) at the bottom and a soft steel layer (102) at the top.

4. A sample cutting device for EVA waterproof board testing as claimed in claim 3, characterized in that: The upper surface of the bottom plate (1) is provided with a placement groove for placing the EVA waterproof plate, and the rubber buffer layer (101) and the mild steel layer (102) are located at the bottom of the placement groove.

5. The sample cutting device for EVA waterproof board testing as claimed in claim 1, characterized in that: A lifting handle (13) is provided on the upper surface of the cutting plate (7).

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