Multilayer concrete impermeability tester

Abstract

The invention discloses a concrete impermeability tester, which includes a top cover and at least two layers of test mold lower mounting plates. The test mold lower mounting plates and the top cover are connected by columns to form a fixed frame. The upper part of each layer of the test mold lower mounting plate is provided with a test mold upper mounting plate. The test mold sleeve is installed on the lower part of the test mold upper mounting plate. The test mold boss is installed on the test mold lower mounting plate. A lifting device is provided on the test mold upper mounting plate. A lifting drive device is provided on the frame. The lifting drive device drives the lifting device and then drives the test mold upper mounting plate to move up and down, so that the test mold is opened or closed. A test mold locking device is provided between the test mold upper mounting plate and the test mold lower mounting plate. A pair of molds on the test mold lower mounting plate and the test mold upper mounting plate can be opened separately, and all molds can be opened at the same time, which is convenient and flexible; each pair of test mold lower mounting plates and test mold upper mounting plates are independent of each other and do not interfere with each other, so that the problem of inaccurate test data is not easy to occur; all molds can also be opened at the same time, and the test efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of concrete quality detection, and in particular to a detection device for concrete impermeability test. Background Art

[0002] Concrete is an artificial stone widely used in construction. The impermeability of concrete is an important indicator for evaluating the quality and durability of concrete, and is also a must-check indicator for each engineering quality supervision station to strictly control the quality of concrete. Projects with concrete impermeability requirements: such as hydraulic engineering, port engineering, road and bridge engineering, underground structure engineering, etc. The so-called impermeability refers to the ability of the material used in the structure to resist the penetration of water and / or other liquid (light oil, heavy oil) media under pressure.

[0003] The concrete impermeability tester is an instrument used to detect the waterproof performance of concrete after hardening and to determine its impermeability rating. It is an essential measuring instrument for concrete premix companies and construction engineering quality inspection laboratories. The concrete impermeability tester uses the principle that the pressure in a sealed container is equal everywhere. A water pump is used to supply pressure to the entire system. The pressure is connected to the pressure vessel, control valve, test mold seat, etc. through pipes. The pressure is output by the water pump into the pressure vessel, and then delivered to each test piece system for loading testing. The pressure gauge and controller are used to control the size of the pressurized pressure, so that the water pressure penetrates from the bottom to the top and pressurizes the test piece installed in the test mold, thereby determining the test piece's impermeability performance and calculating its impermeability rating. The concrete impermeability test cycle is relatively long. In the past, the concrete impermeability tester could only perform one set of test tests at a time, requiring multiple testers, with low test efficiency and large space occupation. For this reason, corresponding solutions are provided in the prior art, such as the patent number obtained by the applicant is 201730163179 .7. The appearance design patent named "Stacked Concrete Water Permeability Tester"; the invention patent application filed by the applicant Wang Xi named "A multi-layer water penetration resistance testing machine" with application number 201911301333.7. The technical solution includes a base and a top cover with a cavity, and two groups of mutually symmetrical columns are arranged between the top cover and the base. Several layers of carrier plates carrying several test mold sleeves are sleeved on the columns from top to bottom, and each adjacent carrier plate is connected by a locking pin, which is locked by a locking device; a lifting drive device for driving the carrier plate to move vertically is installed in the cavity of the top cover; the test mold sleeve includes a test mold sleeve installed at the bottom of the upper carrier plate, and a test mold boss installed on the surface of the lower carrier plate and matching the test mold sleeve, and the test mold boss is provided with a water inlet hole and a drainage hole. It has a high degree of automation. Each device is equipped with multiple layers of carrier plates, which can perform anti-permeability tests on multiple samples at the same time. However, "each adjacent carrier plate is connected by a locking pin", and only the mold on one layer of the carrier plate can be opened at a time, and the efficiency of loading and unloading samples is low; the upper side of each layer of the carrier plate is installed with the test mold boss (lower mold) of the mold on this layer, and the lower side is installed with the test mold sleeve (upper mold) of the lower mold. If the test molds on a testing machine are not fully loaded with samples, and samples are loaded into the test molds without samples loaded in the middle of the test, it will affect the previous samples, especially the test molds on the bottom layer. Because the weight of all the layers of carrier plates, test molds and samples above acts on the test molds on the bottom layer, it is easy to have inaccurate test data. Summary of the invention

[0004] The purpose of the present invention is to provide a multi-layer concrete impermeability tester with high sample loading and unloading efficiency and accurate test data in view of the deficiencies in the prior art.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A multi-layer concrete impermeability tester comprises a top cover and at least two layers of test mold lower mounting plates, the test mold comprises a test mold sleeve and a test mold boss, and is characterized in that: the test mold lower mounting plate and the top cover are connected by columns to form a fixed frame, the upper part of the test mold lower mounting plate is provided with a test mold upper mounting plate, the test mold sleeve is installed on the lower part of the test mold upper mounting plate, the test mold boss is installed on the test mold lower mounting plate, a lifting device is provided on the test mold upper mounting plate, a lifting drive device is provided on the frame, the lifting drive device drives the lifting device and then drives the test mold upper mounting plate to move up and down, so that the test mold is opened or closed; a test mold locking device is provided between the test mold upper mounting plate and the test mold lower mounting plate.

[0007] By adopting the above technical solution, each test mold lower mounting plate is provided with a corresponding test mold upper mounting plate on the upper part. In conjunction with the lifting drive device and the test mold locking device, the molds on a pair of test mold lower mounting plates and the test mold upper mounting plates can be opened separately (only the test mold locking devices between the pair of test mold lower mounting plates and the test mold upper mounting plates are unlocked), and all molds can also be opened completely (all test mold locking devices are unlocked).

[0008] In the above-mentioned multi-layer concrete impermeability tester, the lifting device includes a rack arranged on a column, a lifting shaft rotatably connected to a mounting plate on a test mold, a driving gear and a driven gear are arranged on the lifting shaft, the driven gear is meshed with the rack, the driving gear is connected to a lifting drive device, the lifting drive device drives the lifting shaft to rotate through the driving gear, and the lifting shaft drives the mounting plate on the test mold to rise and fall along the rack through the driven gear.

[0009] Furthermore, the rack is arranged on the rear side surface of the front column and the front side surface of the rear column, a lifting shaft mounting plate is fixedly connected to the mounting plate on the test mold, the lifting shaft is rotatably connected to the lifting shaft mounting plate, the two lifting shaft mounting plates form a group, each driven gear corresponds to a group of lifting shaft mounting plates, and is located between the two lifting shaft mounting plates, and the driving gear is arranged at one end of the lifting shaft.

[0010] Furthermore, wear-resistant blocks are embedded on the sides of the ends of two lifting shaft mounting plates in the set of lifting shaft mounting plates, and the wear-resistant blocks slide along the side of the rack.

[0011] By adopting the above technical solution, the left and right movement of the lifting shaft mounting plate can be limited, providing guidance for the lifting and lowering of the mounting plate on the test mold.

[0012] Furthermore, the driving gear is a gear-type torque limiter.

[0013] By adopting the above technical solution, when it is necessary to open the mold on a pair of the lower mounting plate and the upper mounting plate of the test mold, only the test mold locking device between the pair of the lower mounting plate and the upper mounting plate of the test mold is unlocked, and the driving rack of the lifting drive device drives the gear-type torque limiter at the end of the lifting shaft on the upper mounting plate of the test mold to rotate the lifting shaft, drive the upper mounting plate of the test mold to rise, and open the mold on the pair of the lower mounting plate and the upper mounting plate of the test mold;

[0014] The gear-type torque limiters of the lifting shafts on the mounting plates of other test molds slipped because the test mold locking devices were not unlocked, and could not drive the lifting shafts to rotate, but did not affect the up and down movement of the driving racks of the lifting drive devices.

[0015] In the above-mentioned multi-layer concrete impermeability tester, the lifting and driving device comprises:

[0016] The lifting and reducing motor is set at the upper part of the right end of the frame, and a lead screw is connected to the output shaft.

[0017] The rack mounting plate has a nut on the upper end, which meshes with the lead screw to form a spiral pair.

[0018] The driving rack is installed on the rack mounting plate and meshes with the driving gear on the lifting shaft.

[0019] The guide rail mounting plate is set at the right end of the rack.

[0020] Guide rail and slider pair, the guide rail is installed on the guide rail mounting plate, and the slider is installed on the rack mounting plate.

[0021] By adopting the above technical solution, the lifting reduction motor rotates through the spiral pair to drive the rack mounting plate to move up and down along the guide rail slider pair, and the driving rack on the rack mounting plate simultaneously drives the gear-type torque limiter at the end of the lifting shaft on the mounting plate of each test mold, so that the lifting shaft rotates (the test mold locking device on the mounting plate of the test mold is opened) or does not rotate (the test mold locking device on the mounting plate of the test mold is not opened, and the gear-type torque limiter slips).

[0022] In the above-mentioned multi-layer concrete impermeability tester, the test mold locking device comprises:

[0023] The locking cylinder is installed at the left end of the mounting plate under the test mold.

[0024] The locking column has an upper end fixedly connected to the mounting plate on the test mold and a ring-shaped slot at the lower end.

[0025] Two locking plates are respectively arranged at the lower part of the mounting plate under the test mold, and the left end is connected to the rod end of the locking cylinder through a connecting frame. The locking plate is provided with a long hole corresponding to the locking column and a through hole for the locking column to pass through. The through hole is connected to the long hole. The width of the long hole is greater than the diameter of the bottom of the annular groove. The thickness of the locking plate is less than the width of the groove. The two locking plates are connected by a connecting plate.

[0026] The support plate has a U-shaped cross-section and is arranged at the lower part of the locking plate. Both ends are connected to the lower mounting plate of the test mold. The depth of the U-shaped groove is greater than the thickness of the locking plate. The width of the U-shaped groove corresponds to the distance between the outer edges of the two locking plates. The locking cylinder drives the locking plate to slide between the lower mounting plate of the test mold and the support plate.

[0027] By adopting the above technical solution, the locking cylinder drives the two locking plates arranged on the front and rear sides of the lower mounting plate of the test mold to move left and right at the same time through the connecting frame. When the through hole on the locking plate is opposite to the locking column above, the lifting drive device drives the upper mounting plate of the test mold to descend to close the test mold. At this time, the lower end of the locking column is also inserted into the through hole, and the locking cylinder is started to move the two locking plates. The long hole on the locking plate is stuck in the annular groove of the locking column, and the upper mounting plate of the test mold and the lower mounting plate of the test mold are locked together.

[0028] Beneficial effects of the present invention:

[0029] 1. Each test mold lower mounting plate is provided with a corresponding test mold upper mounting plate on the upper part. With the lifting drive device and the test mold locking device, the molds on a pair of test mold lower mounting plates and the test mold upper mounting plates can be opened separately, and all molds can also be opened at the same time, which is convenient and flexible;

[0030] 2. Each pair of test mold lower mounting plate and test mold upper mounting plate are independent of each other and do not interfere with each other, which makes it less likely for inaccurate test data to occur;

[0031] 3. Compared with the existing technology, all molds can be opened at the same time, and the test efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a three-dimensional schematic diagram of the left side of the present invention.

[0033] Figure 2 It is a three-dimensional schematic diagram of the right side of the present invention.

[0034] Figure 3 It is a front view schematic diagram of the present invention.

[0035] Figure 4 It is a top view schematic diagram of the present invention.

[0036] Figure 5 It is a left schematic view of the present invention.

[0037] Figure 6It is a right side schematic diagram of the present invention.

[0038] Figure 7 for Figure 1 A magnified schematic diagram of part A in FIG.

[0039] Figure 8 for Figure 2 An enlarged schematic diagram of part B in FIG.

[0040] Fig. 9 for Figure 2 Enlarged schematic diagram of part C in FIG.

[0041] Fig.10 for Figure 2 In Enlarged schematic diagram.

[0042] Fig.11 for Figure 2 In Enlarged schematic diagram.

[0043] Fig.12 for Figure 2 In Enlarged schematic diagram.

[0044] Fig.13 for Figure 3 DD cross-sectional view in .

[0045] Fig.14 for Figure 4 EE cross-sectional diagram in .

[0046] Fig.15 for Figure 6 FF cross-sectional diagram in .

[0047] Fig.16 It is a schematic diagram of the rack in the present invention.

[0048] Fig.17 It is a schematic diagram of the base in the present invention.

[0049] Fig.18 It is a schematic diagram of the mounting plate and lifting device on the pilot mold of the present invention.

[0050] Fig.19 It is a schematic diagram of the lifting drive device in the present invention.

[0051] Fig. 20 It is a schematic diagram of the pilot mold locking device of the present invention.

[0052] In the figure: 1 base, 1-1 left bottom plate, 1-2 cross brace, 1-3 frame,

[0053] 2. Test mold upper mounting plate, 3. Column, 3. 1. Rack, 4. Test mold lower mounting plate, 5. Test mold boss, 6. Test mold sleeve, 7. Top cover,

[0054] 8 lifting drive device, 81 lifting reduction motor, 82 screw rod, 83 nut, 84 rack mounting plate, 85 driving rack, 86 guide rail mounting plate, 87 guide rail, 88 slider,

[0055] 9 lifting device, 91 lifting shaft mounting plate, 92 lifting shaft, 93 driven gear, 94 driving gear, 95 wear-resistant block, 96 lifting shaft connecting plate,

[0056] 10 trial mold locking device, 101 locking cylinder, 102 connecting frame, 103 locking plate, 1031 through hole, 1032 long hole, 104 locking column, 1041 annular groove, 105 connecting plate, 106 supporting plate,

[0057] 11: test piece, 12: second column. DETAILED DESCRIPTION

[0058] In order to clearly illustrate the technical features of the present invention, the present invention is further described below through non-limiting embodiments in conjunction with the accompanying drawings.

[0059] Please see Figures 1 to 6 , Figures 16 to 18 A multi-layer concrete impermeability tester comprises a base 1, a top cover 7 and a four-layer test mold lower mounting plate 4, the test mold comprises a test mold sleeve 6 and a test mold boss 5, the test mold lower mounting plate 4 and the top cover 7 are connected by a column 3 to form a fixed frame, the upper part of the test mold lower mounting plate 4 is provided with a test mold upper mounting plate 2, the test mold sleeve 6 is installed at the lower part of the test mold upper mounting plate 2, and the test mold boss 5 is installed on the test mold lower mounting plate 4; in this example, a total of 4 groups of test mold mounting plates are arranged, each group of test mold mounting plates comprises a test mold upper mounting plate 2 and a test mold lower mounting plate Mounting plate 4, each group of test mold mounting plates is provided with 6 sets of test molds, the test molds are arranged in 4 layers from top to bottom, and are arranged on 4 groups of test mold mounting plates, in a group of test mold mounting plates on the first layer, the test mold lower mounting plate 4 is installed on the base 1; the test mold upper mounting plate 2 is provided with a lifting device 9, and the frame is provided with a lifting drive device 8, the lifting drive device 8 drives the lifting device 9 and then drives the test mold upper mounting plate 2 to move up and down, so that the test mold is opened or closed; a test mold locking device 10 is provided between the test mold upper mounting plate 2 and the test mold lower mounting plate 4.

[0060] Please see Fig.17The lifting device 9 includes a rack 31 arranged on the rear side surface of each front column 3 and the front side surface of the rear column 3, and a lifting shaft 92 rotatably connected to both sides of the test mold upper mounting plate 2. A driving gear 94 and a driven gear 93 are set on the lifting shaft 92 through a key connection. The driven gear 93 is meshed with the rack 31. The driving gear 94 is connected to the lifting drive device 8. The lifting drive device 8 drives the lifting shaft 92 to rotate through the driving gear 94, and the lifting shaft 92 drives the test mold upper mounting plate 2 to rise and fall along the rack 31 through the driven gear 93.

[0061] Specifically, a lifting shaft mounting plate 91 is fixedly connected to the test mold upper mounting plate 2. The lifting shaft mounting plate 91 is in an inverted U shape and is connected to the test mold upper mounting plate 2 with bolts in the middle. The lifting shaft 92 is rotatably connected to the lifting shaft mounting plate 91 through a bearing. Two lifting shaft mounting plates 91 form a group, and each driven gear 93 corresponds to a group of lifting shaft mounting plates 91 and is located between the two lifting shaft mounting plates 91; 4. The ends of the two lifting shaft mounting plates 91 in each group of lifting shaft mounting plates 91 are inlaid with wear-resistant blocks 95 on the side facing each other, and the wear-resistant blocks 95 slide along the side of the rack 31; the driving gear 94 is arranged at the right end of the lifting shaft 92, and the right ends of the two lifting shafts 92 are rotatably connected to the lifting shaft connecting plate 96 through bearings. In this embodiment, the driving gear 94 adopts a gear-type torque limiter.

[0062] Please see Fig.18 The lifting drive device 8 includes a lifting reduction motor 81, a rack mounting plate 84, a driving rack 85, a guide rail mounting plate 86, and a guide rail slider pair. The lifting reduction motor 81 is installed at the upper part of the right end of the frame, and a screw rod 82 is connected to its output shaft. A nut 83 is provided at the upper end of the rack mounting plate 84, which meshes with the screw rod 82 to form a spiral pair. The driving rack 85 is installed on the front and rear sides of the rack mounting plate 84 and meshes with the driving gear 94 on the lifting shaft 92. The guide rail mounting plate 86 is arranged at the right end of the frame, the upper end is connected to the top cover 7, and the lower end is connected to the base 1. The guide rail 87 of the guide rail slider pair is installed on the guide rail mounting plate 86, and the slider 88 is installed on the rack mounting plate 84. The lifting reduction motor 81 rotates to drive the lead screw 82 to rotate, and drives the rack mounting plate 84 to rise and fall along the guide rail slider pair through the spiral pair. The driving rack 85 on the rack mounting plate 84 simultaneously drives the gear-type torque limiters at the ends of each lifting shaft 92 meshing with it, so that the lifting shaft 92 rotates (the test mold locking device 10 on the test mold mounting plate 2 is opened) or does not rotate (the test mold locking device 10 on the test mold mounting plate 2 is not opened, and the gear-type torque limiter slips).

[0063] Please see Fig.19The test mold locking device 10 includes a locking cylinder 101, a locking column 104, and a locking plate 103. The locking cylinder 101 is installed at the left end of the test mold lower mounting plate 4. The upper end of the locking column 104 is fixedly connected to the lower bottom surface of the test mold upper mounting plate 2, and the lower end is provided with an annular groove 1041. Two locking plates 103 are provided, which are respectively located at the lower part of the front side and the rear side of the test mold lower mounting plate 4. The left end is connected to the rod end of the locking cylinder 101 through the connecting frame 102. The locking plate 103 is provided with a The long hole 1032 corresponding to the locking column 104 and the through hole 1031 through which the locking column 104 passes, the through hole 1031 is connected to the long hole 1032, the width of the long hole 1032 is greater than the diameter of the bottom of the annular groove 1041, and the thickness of the locking plate 103 is less than the width of the groove; the two locking plates 103 are connected by a connecting plate 105; it also includes a support plate 106 with a U-shaped cross-section, which is arranged at the lower part of the locking plate 103, and the two ends are connected to the lower mounting plate 4 of the test mold with bolts, the depth of the U-shaped groove is greater than the thickness of the locking plate 103, and the width of the U-shaped groove corresponds to the distance between the outer edges of the two locking plates 103, and the locking cylinder 101 drives the locking plate 103 to slide between the lower mounting plate 4 of the test mold and the support plate 106.

[0064] It should be noted that, in a group of test mold mounting plates in the first layer (lowermost layer) of the present embodiment, the test mold lower mounting plate 4 is mounted on the base 1; the left end of the upper and lower test mold mounting plates 4 on the base 1 extends to the left with a left bottom plate 1-1 for mounting auxiliary facilities such as a water pump and an accumulator, and the left bottom plate 1-1 is U-shaped, and the U-shaped notch provides installation and movement space for the locking cylinder 101 of the test mold locking device 10; the base 1 is welded by surrounding frames 1-3 and a plurality of cross braces 1-2, and the cross braces 1-2 are also U-shaped, and the U-shaped notch provides installation and movement space for the locking plate 103 of the test mold locking device 10.

[0065] In order to improve the rigidity of the test mold lower mounting plate 4, a support seat composed of a frame and a cross brace can also be added to the lower part of the test mold lower mounting plate 4, and the structure is similar to that of the base 1. Fig.17 , but the length is shorter than base 1.

[0066] In order to increase the rigidity of the frame, a second column 12 is provided at the right end of the frame, and the second column 12 is connected between the top cover 7 and the base 1 .

[0067] Working process:

[0068] 1. Initial state: the test molds are in a closed state, and the test mold locking devices 10 are in a locked state;

[0069] 2. All test molds are opened and test piece 11 is installed:

[0070] (1) Start the locking cylinder 101 of each layer, drive the locking plate 103 to move to the left, and the locking column 104 enters the through hole 1031 on the locking plate 103;

[0071] (2) Start the lifting and reducing motor 81 to drive the rack mounting plate 84 to rise. The driving rack 85 on the rack mounting plate 84 simultaneously drives the gear-type torque limiter at the end of the lifting shaft 92 on the mounting plate 2 on each test mold, so that each lifting shaft 92 rotates, driving the mounting plate 2 on each test mold to rise, and all molds are opened;

[0072] (3) Install the test piece 11, inspect the sealing device, etc.;

[0073] (4) Start the lifting and reducing motor 81 again to drive the rack mounting plate 84 to descend. The driving rack 85 on the rack mounting plate 84 simultaneously drives the gear-type torque limiter at the end of the lifting shaft 92 on the mounting plate 2 on each test mold, so that each lifting shaft 92 rotates, driving the mounting plate 2 on each test mold to descend, and closing all molds;

[0074] (5) Start the locking cylinder 101 of each layer again, drive the locking plate 103 to move to the right, and the long hole 1032 on the locking plate 103 is stuck in the annular groove 1041 of the locking column 104, so that the upper mounting plate 2 of the test mold and the lower mounting plate 4 of the test mold are locked together;

[0075] (6) The control system can start the water seepage test on the test piece 11 according to the set test procedure.

[0076] 3. Only one layer of the test mold needs to be opened and the test piece 11 needs to be installed:

[0077] (1) Start the locking cylinder 101 of a certain layer, drive the locking plate 103 to move to the left, and the locking column 104 enters the through hole 1031 on the locking plate 103;

[0078] (2) Start the lifting and reducing motor 81 to drive the rack mounting plate 84 to rise. The driving rack 85 on the rack mounting plate 84 simultaneously drives the gear-type torque limiter at the end of the lifting shaft 92 on each test mold upper mounting plate 2, so that the lifting shaft 92 of a certain layer rotates, driving the test mold upper mounting plate 2 to rise and open the mold; the gear-type torque limiters of the lifting shafts 92 of other layers slip and cannot drive the lifting shafts 92 to rotate;

[0079] (3) Install the test piece 11, inspect the sealing device, etc.;

[0080] (4) Start the lifting and reducing motor 81 again to drive the rack mounting plate 84 to descend. The driving rack 85 on the rack mounting plate 84 simultaneously drives the gear-type torque limiter at the end of the lifting shaft 92 on each test mold upper mounting plate 2, so that the lifting shaft 92 of a certain layer rotates, driving the test mold upper mounting plate 2 to descend, and closing the mold;

[0081] (5) The locking cylinder 101 of the first layer drives the locking plate 103 to move rightward again, and the long hole 1032 on the locking plate 103 is clamped on the annular groove 1041 of the locking column 104, thereby locking the upper mounting plate 2 of the test mold and the lower mounting plate 4 of the test mold together;

[0082] (6) The control system can start the water seepage test on the test piece 11 according to the set test procedure.

[0083] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "left", "right", "front", "back", "up", "down", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. The above terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0084] Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] Except for the technical features described in the specification, all other technical features are known technologies to those skilled in the art.

[0086] The above specific implementations are only specific cases of the present invention and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent implementation of equivalent changes. However, any simple modification, equivalent change and modification made to the above implementation according to the technical essence of the present invention without departing from the technical principle of the present invention shall fall within the patent protection scope of the present invention.

Claims

1. A multi-layer concrete impermeability tester, comprising a top cover, at least two layers of test mold lower mounting plates, the test mold comprising a test mold sleeve and a test mold boss, characterized in that: The lower mounting plate and the top cover of the test mold are connected by columns to form a fixed frame. The upper part of the lower mounting plate of the test mold is provided with an upper mounting plate of the test mold. The test mold sleeve is installed on the upper mounting plate of the test mold. The test mold boss is installed on the lower mounting plate of the test mold. A lifting device is provided on the upper mounting plate of the test mold. A lifting drive device is provided on the frame. The lifting drive device drives the lifting device to drive the upper mounting plate of the test mold to move up and down, so that the test mold is opened or closed; a test mold locking device is provided between the upper mounting plate of the test mold and the lower mounting plate of the test mold; The lifting device comprises a rack arranged on the column, a lifting shaft rotatably connected to the mounting plate on the test mold, a driving gear and a driven gear are arranged on the lifting shaft, the driven gear is meshed with the rack, the driving gear is connected to the lifting drive device, the lifting drive device drives the lifting shaft to rotate through the driving gear, and the lifting shaft drives the mounting plate on the test mold to rise and fall along the rack through the driven gear; The driving gear is a gear-type torque limiter; The trial mold locking device comprises: The locking cylinder is installed at the left end of the mounting plate under the test mold. The locking column has an upper end fixedly connected to the mounting plate on the test mold and a ring-shaped slot at the lower end. Two locking plates are respectively arranged at the lower part of the mounting plate under the test mold, and the left end is connected to the rod end of the locking cylinder through a connecting frame. The locking plate is provided with a long hole corresponding to the locking column and a through hole for the locking column to pass through. The through hole is connected to the long hole, and the width of the long hole is greater than the diameter of the bottom of the annular groove. The thickness of the locking plate is less than the width of the groove. The two locking plates are connected by a connecting plate. The support plate has a U-shaped cross-section and is arranged at the lower part of the locking plate. Both ends are connected to the lower mounting plate of the test mold. The depth of the U-shaped groove is greater than the thickness of the locking plate. The width of the U-shaped groove corresponds to the distance between the outer edges of the two locking plates. The locking cylinder drives the locking plate to slide between the lower mounting plate of the test mold and the support plate.

2. A multi-layer concrete impermeability tester as claimed in claim 1, characterized in that: The rack is arranged on the rear side surface of the front column and the front side surface of the rear column. A lifting shaft mounting plate is fixedly connected to the mounting plate on the test mold. The lifting shaft is rotatably connected to the lifting shaft mounting plate. The two lifting shaft mounting plates form a group. Each driven gear corresponds to a group of lifting shaft mounting plates and is located between the two lifting shaft mounting plates. The driving gear is arranged at one end of the lifting shaft.

3. A multi-layer concrete impermeability tester as claimed in claim 2, characterized in that: The ends of two lifting shaft mounting plates in the set of lifting shaft mounting plates are inlaid with wear-resistant blocks on one side facing each other, and the wear-resistant blocks slide along the side of the rack.

4. A multi-layer concrete impermeability tester as claimed in claim 2 or 3, characterized in that: The lifting drive device comprises: The lifting and reducing motor is set at the upper part of the right end of the frame, and a lead screw is connected to the output shaft. The rack mounting plate has a nut on the upper end, which meshes with the lead screw to form a spiral pair. The driving rack is installed on the rack mounting plate and meshes with the driving gear on the lifting shaft. The guide rail mounting plate is set at the right end of the rack. Guide rail and slider pair, the guide rail is installed on the guide rail mounting plate, and the slider is installed on the rack mounting plate.

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