Pressure test device for concrete detection

Abstract

The invention relates to the technical field of concrete detection, in particular to a pressure test device for concrete detection, which comprises a sample carrying table, the upper part of the sample carrying table is connected with an air cylinder mounting plate through a plurality of optical shafts which are longitudinally arranged, the air cylinder mounting plate is connected with a pressurizing air cylinder, and the output end of the pressurizing air cylinder is connected with a pressing plate which is slidably mounted on the optical shafts; a pressure sensor is arranged between the pressing plate and the output end of the pressurizing cylinder; the pressing plate is connected with a cleaning mechanism for cleaning the lower surface of the pressing plate, the upper surface of the sample carrying table and the upper surface of the concrete sample placed on the sample carrying table. In the pressure test process, the cleaning mechanism can timely clean the lower surface of the pressing plate and the upper surface of the sample loading table before and after each test or in the test process, so that the lower surface of the pressing plate and the upper surface of the sample loading table can be fully and uniformly contacted with a concrete sample in a subsequent test, crushed materials are prevented from influencing pressure transmission, and the stress of the sample is more uniform; therefore, the accuracy of test results is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete detection, and more specifically, to a pressure test device for concrete detection. Background Art

[0002] In the field of construction engineering, concrete, as an important building material, its quality is directly related to the safety and durability of buildings. In order to ensure that the quality of concrete meets the design requirements, it is necessary to conduct a pressure test on concrete specimens to detect performance indicators such as their compressive strength.

[0003] The existing pressure test devices for concrete detection mainly consist of a press, a pressure plate, a sample stage, etc. During the pressure test, the concrete specimen is placed on the sample stage, and the press drives the pressure plate to apply pressure to the concrete specimen until the specimen fails, so as to obtain the compressive strength data of the concrete. However, the existing pressure test devices for concrete detection have some deficiencies. On the one hand, during the pressure test of the concrete specimen, it is impossible to detect the flatness of the upper surface of the concrete specimen. Since the surface of the concrete specimen may be uneven during the production and molding process, when the uneven specimen is under pressure during the pressure test, it will cause uneven stress at each part of the specimen, and the actual stress area becomes smaller. This will not only affect the accuracy of the pressure test results, making the test data unable to truly reflect the compressive performance of the concrete, but also cause the press base to bear a large uneven load, which is likely to damage the press base during long-term use, shorten the service life of the press, and increase the equipment maintenance cost.

[0004] On the other hand, the existing device cannot clean the broken concrete specimen materials adhering to the lower surface of the pressure plate and the upper surface of the sample stage. During the pressure test, a large amount of broken materials will be generated after the concrete specimen is broken, and these broken materials will adhere to the lower surface of the pressure plate and the upper surface of the sample stage. If not cleaned in time, in subsequent tests, these broken materials will affect the contact state between the pressure plate and the concrete specimen as well as between the concrete specimen and the sample stage, further leading to uneven stress, which will also have an adverse impact on the pressure test results, and at the same time affect the normal operation and service life of the pressure test device. Summary of the Invention

[0005] The purpose of the present invention is to provide a pressure test device for concrete detection, which can effectively solve the problems in the prior art.

[0006] The purpose of the present invention is achieved through the following technical solutions: A pressure test device for concrete detection, comprising: a sample stage, the upper part of the sample stage is connected to a cylinder mounting plate through multiple longitudinally arranged optical axes, a pressurizing cylinder is connected to the cylinder mounting plate, the output end of the pressurizing cylinder is connected to a pressing plate slidably mounted on the multiple optical axes, and a pressure sensor is arranged between the pressing plate and the output end of the pressurizing cylinder; a cleaning mechanism is connected to the pressing plate for cleaning the lower surface of the pressing plate, the upper surface of the sample stage and the upper surface of the concrete sample placed on the sample stage.

[0007] Preferably, the pressure test device for concrete detection further comprises: an enclosure structure mounted on the sample stage; the enclosure structure includes: a rectangular enclosure frame surrounding the outside of the sample stage and the pressing plate, the rectangular enclosure frame is fixed on the tops of multiple lifting cylinders, and the bottoms of the multiple lifting cylinders are mounted on the side of the sample stage through cylinder seats.

[0008] Preferably, the pressing plate includes: an upper plate body slidably mounted on the multiple optical axes, the top of the upper plate body is connected to the output end of the pressurizing cylinder, and the bottom of the upper plate body is connected to a lower plate body for pressing on the upper surface of the concrete sample.

[0009] Preferably, the cleaning mechanism includes: an inverted triangular frame, a movable cleaning frame and a reset compression spring; the inverted triangular frame is fixedly mounted above the upper plate body through a connecting seat; there are two movable cleaning frames, and the relative sides of the two movable cleaning frames are slidably connected in the L-shaped slideways at the front and rear ends of the upper plate body. After the two movable cleaning frames are butted, the bottom is in an inverted triangular structure, and one or more reset compression springs are fixed between the front and rear ends of each movable cleaning frame and the inner side walls of the two L-shaped slideways.

[0010] Preferably, the movable cleaning frame includes: a triangular scraping plate, the triangular scraping plate is connected to the bottoms of two longitudinal beams, the tops of the two longitudinal beams are connected to two L-shaped sliders, and the two L-shaped sliders are fixedly connected to the inner side walls of the two L-shaped slideways through reset compression springs. The horizontal blocks of the two L-shaped sliders are respectively slidably fitted in the lower slideways of the two L-shaped slideways of the upper plate body, and the vertical blocks of the two L-shaped sliders are respectively slidably fitted in the upper slideways of the two L-shaped slideways of the upper plate body; the tops of the longitudinal beams are in contact and cooperation with one inclined surface of the inverted triangular frame, and there is a gap between the two longitudinal beams of the two movable cleaning frames; the bottoms of the two triangular scraping plates of the two movable cleaning frames are butted to form an equilateral triangular structure.

[0011] Preferably, the longitudinal beam includes: a longitudinal support body slidably connected in the longitudinal slideway of the horizontal block, the bottom of the longitudinal support body is fixed on the triangular scraping plate, the top of the longitudinal support body is fixedly connected to a top block, and a rounded corner is provided at the contact position between the top block and one inclined surface of the inverted triangular frame; the top block is fixedly connected to the top of the longitudinal axis, the middle part of the longitudinal axis is slidably fitted on the cross plate at the side of the horizontal block, the bottom of the longitudinal axis is connected to the triangular scraping plate, and a tension spring is sleeved on the shaft body of the longitudinal axis between the cross plate and the triangular scraping plate.

[0012] Preferably, the movable cleaning rack further includes: an upper scraping plate slidably fitted to the lower surface of the lower plate body. The upper scraping plate is connected to the bottom of the cross-blocks of two L-shaped sliders, and the upper scraping plate is disposed in the longitudinal sliding channels of two longitudinal support bodies.

[0013] Preferably, a scraping groove is provided on the outer side of the top of the upper scraping plate, and the bottom surface of the scraping groove is a material guiding inclined surface that slopes downward from the middle of the lower plate body to the outer side of the lower plate body.

[0014] Preferably, a scraping groove is provided on the outer side of the bottom of the triangular scraping plate. A horizontal shaft is rotatably connected in the scraping groove. A scraping brush roller is fixed on the shaft body of the horizontal shaft located in the scraping groove. The horizontal height of the bottom of the scraping brush roller is not higher than the horizontal height of the bottom of the triangular scraping plate. A driven belt pulley is fixed on the shaft body of the horizontal shaft extending out of the triangular scraping plate. The driven belt pulley is connected by a belt drive to a driving belt pulley fixed on a wheel shaft. The wheel shaft is rotatably connected to the longitudinal beam; a gear fixedly connected to the wheel shaft meshes with a rack connected to the inclined surface of one side of the inverted triangular frame.

[0015] Preferably, the rack is installed in a groove on the inclined surface of one side of the inverted triangular frame, and the wheel body of the gear penetrates into the groove.

[0016] The embodiments of the present invention bring the following beneficial effects: In a pressure test device for concrete detection according to the present invention, a cleaning mechanism for cleaning the lower surface of the pressing plate, the upper surface of the sample stage, and the upper surface of the concrete sample placed on the sample stage is connected to the pressing plate. Multiple contact surfaces can be effectively cleaned by the cleaning mechanism; during the pressure test, the cleaning mechanism can clean the lower surface of the pressing plate and the upper surface of the sample stage timely before and after each test or during the test, which can ensure full and uniform contact with the subsequent concrete samples in the test, avoid broken materials from affecting pressure transmission, make the sample stress more uniform, and thus improve the accuracy of the test results; the cleaning mechanism can also clean the upper surface of the concrete sample placed on the sample stage, which can not only reduce the impurities on the upper surface of the concrete sample, but also be used to check the flatness of the upper surface of the concrete sample, preventing problems such as inconsistent stress at each place caused by too poor flatness of the upper surface of the concrete sample, resulting in damage to the base of the press.

[0017] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following specific preferred embodiments are given below in conjunction with the accompanying drawings and are described in detail as follows. Description of the Drawings

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Overall schematic of the pressure test device provided by an embodiment of the present invention Figure 1 ; Figure 2 Overall schematic of the pressure test device provided by an embodiment of the present invention Figure 2 ; Figure 3 Cross-sectional schematic of the pressure test device provided by an embodiment of the present invention; Figure 4 Partial structure schematic of the pressure test device provided by an embodiment of the present invention; Figure 5 Structure schematic of the pressing plate provided by an embodiment of the present invention Figure 1 ; Figure 6 Structure schematic of the pressing plate provided by an embodiment of the present invention Figure 2 ; Figure 7 Connection structure schematic of the cleaning mechanism and the pressing plate provided by an embodiment of the present invention Figure 1 ; Figure 8 Connection structure schematic of the cleaning mechanism and the pressing plate provided by an embodiment of the present invention Figure 2 ; Figure 9 Structure schematic of the cleaning mechanism provided by an embodiment of the present invention; Figure 10 Structure schematic of the inverted triangular frame provided by an embodiment of the present invention; Figure 11 Structure schematic of the movable cleaning frame provided by an embodiment of the present invention Figure 1 ; Figure 12 Structure schematic of the movable cleaning frame provided by an embodiment of the present invention Figure 2 ; Figure 13 Structure schematic of the longitudinal beam provided by an embodiment of the present invention; Figure 14 Structure schematic of the enclosure structure provided by an embodiment of the present invention; Icons: Sample stage 1; Optical axis 2; Cylinder mounting plate 3; Pressing cylinder 4; Pressing plate 5; Upper plate body 501; Lower plate body 502; Cleaning mechanism 6; Inverted triangular frame 601; Movable cleaning frame 602; Return spring 603; Triangular scraper 604; Longitudinal beam 605; Longitudinal support body 605a; Top block 605b; Longitudinal axis 605c; Cross plate 605d; Tension spring 605e; L-shaped slider 606; Upper scraper 607; Transverse axis 608; Scraping brush 609; Driven pulley 610; Driving pulley 611; Gear 612; Rack 613; Enclosure structure 7; Rectangular enclosure frame 701; Lifting cylinder 702. Detailed implementation

[0020] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0021] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" or "several" means two or more, unless otherwise specifically defined.

[0024] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to match the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of this application. Therefore, they do not have any substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that this application can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in this application. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear description and are not used to limit the scope of implementation of this application. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope of implementation of this application.

[0025] The following will further describe the present invention in detail with reference to the attached Figure 1-14 drawings.

[0026] Embodiment 1 As Figure 1-14 shown, a pressure test device for concrete detection includes: a sample stage 1, the upper part of the sample stage 1 is connected to a cylinder mounting plate 3 through a plurality of longitudinally arranged optical axes 2, a pressurizing cylinder 4 is connected to the cylinder mounting plate 3, the output end of the pressurizing cylinder 4 is connected to a pressure plate 5 slidably mounted on the plurality of optical axes 2, and a pressure sensor is provided between the pressure plate 5 and the output end of the pressurizing cylinder 4; a cleaning mechanism 6 is connected to the pressure plate 5 for cleaning the lower surface of the pressure plate 5, the upper surface of the sample stage 1, and the upper surface of the concrete sample placed on the sample stage 1.

[0027] In a pressure testing device for concrete inspection according to the present invention, when performing a pressure test, the concrete sample to be tested is first placed on a sample loading platform 1. Since the sample loading platform 1 is connected to a cylinder mounting plate 3 via multiple longitudinally arranged optical axes 2, a stable support structure is provided for the entire pressurization system. The pressurization cylinder 4 is activated, and the output end of the pressurization cylinder 4 begins to operate. Since the pressure plate 5 is slidably mounted on the multiple optical axes 2, the movement of the output end of the pressurization cylinder 4 can drive the pressure plate 5 to slide downward along the optical axes 2. As the pressure plate 5 moves downward, it gradually contacts the concrete sample placed on the sample loading platform 1 and applies pressure to it. During the process of the pressure plate 5 applying pressure to the concrete sample, a pressure sensor disposed between the pressure plate 5 and the output end of the pressurization cylinder 4 begins to operate. The pressure sensor detects the pressure applied by the pressure plate 5 on the concrete sample in real time and converts the pressure signal into an electrical signal for subsequent recording and analysis of the pressure data. The test ends when the concrete sample reaches its breaking limit under the action of the pressure and breaks. At this point, performance indicators such as the compressive strength of the concrete sample can be calculated based on the maximum pressure value recorded by the pressure sensor. The cleaning mechanism 6 can clean the lower surface of the pressure plate 5, the upper surface of the sample loading platform 1, and the upper surface of the crushed concrete sample placed on the sample loading platform 1. The cleaning mechanism 6 is connected to the pressure plate 5 and can perform cleaning operations at appropriate locations as the pressure plate 5 moves, removing the crushed concrete generated during the test and preparing for the next test. During the pressure test, the cleaning mechanism can timely clean the lower surface of the pressure plate 5 and the upper surface of the sample loading platform 1 before, after, or during each test, to ensure that they are in full and uniform contact with the concrete sample in the subsequent test, preventing crushed materials from affecting pressure transmission, making the sample more uniformly stressed, and thus improving the accuracy of the test results. The cleaning mechanism 6 can also clean the upper surface of the concrete sample placed on the sample loading platform 1 to reduce impurities on the upper surface of the concrete sample. During the pressure test, the presence of impurities may change the contact state between the sample and the pressure plate, causing changes in the local pressure distribution, and thus affecting the accuracy of the test results. By cleaning impurities, the contact between the sample and the pressure plate 5 is guaranteed to be real and effective, so that pressure can be evenly applied to the sample, thereby obtaining more accurate test data such as compressive strength. Verifying the surface flatness of concrete specimens can identify specimens with poor surface flatness in advance. When subjected to compression, uneven specimens can cause stress concentration in certain areas, resulting in significant deviations between the actual stress conditions and the ideal state. Test data cannot accurately reflect the concrete's true performance. Verifying and excluding such specimens or taking appropriate treatment measures can ensure that test results are more representative of the concrete's actual compressive capacity. Using a cleaning mechanism to clean and verify the flatness of specimen surfaces before testing can preemptively screen out specimens that do not meet requirements, avoiding ineffective pressure testing on these specimens. This reduces unnecessary testing time and resource waste, improving overall testing efficiency.While the cleaning mechanism 6 cleans the specimen, it also completes the flatness calibration, eliminating the need for additional equipment and complex operation procedures, making the operation of the test personnel more convenient, reducing the operation steps and workload, and improving the convenience of the detection work.

[0028] The described concrete testing pressure test device further includes: a surrounding cover structure 7 installed on the specimen stage 1; the surrounding cover structure 7 includes: a rectangular surrounding frame 701 surrounding the outside of the specimen stage 1 and the pressure plate 5, and the rectangular surrounding frame 701 is fixed on the tops of multiple lifting cylinders 702, and the bottoms of the multiple lifting cylinders 702 are installed on the side of the specimen stage 1 through cylinder seats.

[0029] The main function of the surrounding cover structure 7 is to protect and safeguard the concrete specimen placed on the specimen stage 1 during the test. It consists of a rectangular surrounding frame 701 and multiple lifting cylinders 702. The rectangular surrounding frame 701 surrounds the outside of the specimen stage 1 and the pressure plate 5, which can prevent the fragments and debris generated when the concrete specimen breaks during the test from splashing out, avoiding harm to the surrounding environment and operators, and also helping to keep the test environment clean. The lifting cylinder 702 is the key component to realize the lifting function of the rectangular surrounding frame 701. The lifting cylinder 702 generally uses compressed air as the power source. When compressed air is introduced into the lifting cylinder 702, the piston inside the cylinder will move under the action of air pressure. Before the concrete pressure test, it is necessary to raise the rectangular surrounding frame 701 to form a protective barrier. At this time, the lifting cylinder 702 drives the rectangular surrounding frame 701 to rise to an appropriate height to surround the specimen stage 1 and the pressure plate 5. When the concrete pressure test is completed, the lifting cylinder 702 drives the rectangular surrounding frame 701 to descend to the initial position, facilitating the cleaning of the broken concrete and the placement of new specimens, and so on in a cycle, ensuring the safe and orderly progress of the test.

[0030] Embodiment 2 As Figure 1-14As shown in the figure, the pressing plate 5 includes: an upper plate body 501 slidably mounted on multiple optical axes 2, the top of the upper plate body 501 is connected to the output end of the pressing cylinder 4, and the bottom of the upper plate body 501 is connected to a lower plate body 502 for pressing on the upper surface of the concrete specimen. The pressing plate 5 uses the upper plate body 501 and the lower plate body 502 that can be detachably connected in cooperation. During the pressure test, the lower plate body 502 directly contacts the concrete specimen and may be subjected to impacts and abrasions during concrete crushing while bearing the pressure, and is more likely to be damaged than the upper plate body 501. When wear, deformation or other damages occur, only the lower plate body 502 needs to be disassembled for separate repair or replacement, instead of replacing the entire pressing plate 5. This not only reduces the maintenance cost, but also greatly shortens the downtime of the equipment for maintenance and improves the test efficiency. After the pressure test, impurities such as concrete debris and dust may remain on the surface of the lower plate body 502. After disassembling the lower plate body 502 from the connection with the upper plate body 501, it can be more conveniently and thoroughly cleaned to ensure the flatness and cleanliness of the surface of the lower plate body 502, thereby ensuring the accuracy of subsequent tests. In actual concrete detection, it may be necessary to conduct pressure tests on concrete specimens of different sizes, shapes or types. By replacing the lower plate body 502 with different specifications, the pressing plate 5 can better adapt to different test requirements. For example, for larger-sized concrete specimens, a lower plate body 502 with a larger area can be replaced to ensure that the specimen is evenly stressed; for specimens with special shapes, a lower plate body 502 with a corresponding shape can also be customized. This flexibility enables the pressure test device to adapt to a wider range of test scenarios and improves the versatility and practicality of the equipment.

[0031] Embodiment III As Figure 1-14As shown in the figure, the cleaning mechanism 6 includes an inverted triangular frame 601, a movable cleaning frame 602, and a reset compression spring 603. The inverted triangular frame 601 is fixedly installed above the upper plate body 501 through a connecting seat. There are two movable cleaning frames 602, and the relative sliding connection of the two movable cleaning frames 602 is in the L-shaped sliding grooves at the front and rear ends of the upper plate body 501. After the two movable cleaning frames 602 are butted, the bottom is in an inverted triangular structure. More than one reset compression spring 603 is fixed between the front and rear ends of each movable cleaning frame 602 and the inner side walls of the two L-shaped sliding grooves. The movable cleaning frame 602 includes a triangular scraping plate 604. The triangular scraping plate 604 is connected to the bottoms of two longitudinal beams 605. The tops of the two longitudinal beams 605 are connected to two L-shaped sliders 606. The two L-shaped sliders 606 are fixedly connected to the inner side walls of the two L-shaped sliding grooves through the reset compression spring 603. The horizontal blocks of the two L-shaped sliders 606 are respectively slidably fitted in the lower sliding grooves of the two L-shaped sliding grooves of the upper plate body 501, and the vertical blocks of the two L-shaped sliders 606 are respectively slidably fitted in the upper sliding grooves of the two L-shaped sliding grooves of the upper plate body 501. The top of the longitudinal beam 605 is in contact and cooperation with one side inclined surface of the inverted triangular frame 601. There is a gap between the two longitudinal beams 605 of the two movable cleaning frames 602. The bottoms of the two triangular scraping plates 604 of the two movable cleaning frames 602 are butted to form an equilateral triangular structure after butting. The longitudinal beam 605 includes a longitudinal support body 605a slidably connected in the longitudinal sliding groove of the horizontal block. The bottom of the longitudinal support body 605a is fixed on the triangular scraping plate 604. The top of the longitudinal support body 605a is fixedly connected to a top block 605b. A fillet is provided at the contact of the top block 605b and one side inclined surface of the inverted triangular frame 601. The top block 605b is fixedly connected to the top of the longitudinal axis 605c. The middle of the longitudinal axis 605c is slidably fitted on the transverse plate 605d on the side of the horizontal block. The bottom of the longitudinal axis 605c is connected to the triangular scraping plate 604. A tension spring 605e is sleeved on the shaft body of the longitudinal axis 605c between the transverse plate 605d and the triangular scraping plate 604.

[0032] In the pressure test device for concrete detection of the present invention, the setting of the cleaning mechanism 6 can clean the upper surface of the sample stage 1 and the upper surface of the concrete sample placed on the sample stage 1, and the function is practical; When cleaning the upper surface of the sample stage 1 or the upper surface of the concrete sample, when the pressurizing cylinder 4 drives the pressing plate 5 to move downward, the pressing plate 5 drives the cleaning mechanism 6 to move downward, so that the two movable cleaning frames 602 of the cleaning mechanism 6 contact the upper surface of the sample stage 1 or the upper surface of the concrete sample. The bottoms of the two triangular scrapers 604 of the two movable cleaning frames 602 are butted to form an equilateral triangle structure, so that the contact area with the upper surface of the sample stage 1 is small. As the pressing plate 5 continues to move downward, the two triangular scrapers 604 drive the two longitudinal support bodies 605a to slide upward in the longitudinal slideway of the cross block. At this time, since the top block 605b contacts the inclined surface on one side of the inverted triangular frame 601, the two top blocks 605b can slide upward on the inclined surfaces on both sides of the inverted triangular frame 601. When the two top blocks 605b slide, due to the structural setting of the inverted triangular frame 601, the distance between the two top blocks 605b increases continuously during the movement. At this time, the two top blocks 605b drive the two longitudinal support bodies 605a to move away from each other. The adjacent two longitudinal support bodies 605a of the two movable cleaning frames 602 drive the L-shaped sliders 606 to move away from each other in the L-shaped slideway and compress more than one reset compression spring 603 respectively. At this time, the bottoms of the two triangular scrapers 604 are separated, and the two triangular scrapers 604 move away from each other on the upper surface of the sample stage 1 or the upper surface of the concrete sample, so as to scrape off the impurities on the upper surface of the sample stage 1 or the upper surface of the concrete sample; and when the triangular scraper 604 drives the longitudinal support body 605a to slide upward in the longitudinal slideway of the cross block, the tension spring 605e is also compressed. The tension spring 605e makes the triangular scraper 604 closely fit the lower surface of the pressing plate 5 or the upper surface of the sample stage 1 to ensure the cleaning effect. After the cleaning is completed, the triangular scraper 604 is reset downward under the elastic force of the tension spring 605e, and the L-shaped slider 606 is reset under the elastic force of the reset compression spring 603, so that the two triangular scrapers 604 contact and cooperate again.

[0033] The movable cleaning frame 602 further includes: an upper scraper 607 slidably fitted on the lower surface of the lower plate body 502. The upper scraper 607 is connected to the bottom of the cross block of the two L-shaped sliders 606. The upper scraper 607 is arranged in the longitudinal slideways of the two longitudinal support bodies 605a. The outer side of the top of the upper scraper 607 is provided with an upper scraping groove, and the bottom surface of the upper scraping groove is a material guiding inclined surface inclined from the middle of the lower plate body 502 to the outside of the lower plate body 502.

[0034] The design of the above technical solution enables the cleaning mechanism 6 to synchronously clean the lower surface of the pressing plate 5. The upper scraping plate 607 is connected to the bottom of the horizontal blocks of the two L-shaped sliders 606 of each movable cleaning frame 602. When the two movable cleaning frames 602 move away from each other, since the upper scraping plate 607 is slidably fitted to the lower surface of the lower plate body 502, the lower surface of the lower plate body 502 can be cleaned by the separation of the two upper scraping plates 607. Moreover, the upper scraping plate 607 is disposed in the longitudinal sliding grooves of the two longitudinal support bodies 605a, so as not to affect the up-and-down sliding movement of the two longitudinal support bodies 605a. The outer side of the top of the upper scraping plate 607 is provided with an upper scraping groove, and the bottom surface of the upper scraping groove is a material guiding inclined surface that slopes from the middle of the lower plate body 502 to the outside of the lower plate body 502, which is convenient for guiding the scraped impurities to the outside, reducing the probability of the impurities falling between the two triangular scraping plates 604, and preventing it from affecting the cleaning effect of the two triangular scraping plates 604 on the upper surface of the sample stage 1 or the upper surface of the concrete sample.

[0035] Embodiment 4 As Figure 1-14 shown, a scraping groove is provided on the outer side of the bottom of the triangular scraping plate 604. A horizontal shaft 608 is rotatably connected in the scraping groove. A scraping brush roller 609 is fixed on the shaft body of the horizontal shaft 608 located in the scraping groove. The horizontal height of the bottom of the scraping brush roller 609 is not higher than the horizontal height of the bottom of the triangular scraping plate 604. A driven belt pulley 610 is fixed on the shaft body of the horizontal shaft 608 extending out of the triangular scraping plate 604. The driven belt pulley 610 is connected by a belt drive to a driving belt pulley 611 fixed on a wheel shaft. The wheel shaft is rotatably connected to the longitudinal beam 605. A gear 612 fixedly connected to the wheel shaft meshes with a rack 613 connected to the inclined surface on one side of the inverted triangular frame 601. The rack 613 is installed in a groove on the inclined surface on one side of the inverted triangular frame 601, and the wheel body of the gear 612 penetrates into the groove.

[0036] In a pressure test device for concrete detection according to the present invention, a scraping groove is provided on the outer side of the bottom of the triangular scraping plate 604. If the upper surface of the concrete specimen is uneven, when the scraping groove of the triangular scraping plate 604 contacts the uneven part, there will be a jamming problem, and thus it is impossible to effectively slide outward to scrape the material. At this time, it can be judged that the upper surface of the concrete specimen is uneven, making it easier to detect the flatness of the upper surface of the concrete specimen; a horizontal shaft 608 is rotatably connected in the scraping groove, and a scraping brush 609 is fixed on the shaft body of the horizontal shaft 608 located in the scraping groove. The horizontal height of the bottom of the scraping brush 609 is not higher than the horizontal height of the bottom of the triangular scraping plate 604, so that the scraping brush 609 is in effective contact with the upper surface of the sample stage 1 or the upper surface of the concrete specimen, and when the triangular scraping plate 604 moves outward, the impurities on the upper surface of the sample stage 1 or the upper surface of the concrete specimen are swept outward by the scraping brush 609, improving the cleaning effect, and the scraping brush 609 does not require additional power. When the top block 605b slides upward on the inclined surface of the inverted triangular frame 601, the gear 612 on the wheel shaft contacts different positions of the rack 613 connected in the inclined groove of the inverted triangular frame 601, thereby controlling the gear 612 to rotate around its own axis. As Figure 9 shown, when the gear 612 located on the left side of the inverted triangular frame 601 rolls upward, it can drive itself to rotate clockwise, thereby driving the wheel shaft and the driving pulley 611 to rotate clockwise. The driving pulley 611 drives the driven pulley 610 to rotate clockwise through a belt, thereby controlling the scraping brush 609 at the bottom of the left triangular scraping plate 604 to rotate clockwise for cleaning, and sweeping the impurities from the center of the two triangular scraping plates 604 to the outside; when the gear 612 located on the right side of the inverted triangular frame 601 rolls upward, it can drive itself to rotate counterclockwise, thereby driving the wheel shaft and the driving pulley 611 connected thereto to rotate counterclockwise. The driving pulley 611 drives the driven pulley 610 to rotate counterclockwise through a belt, thereby controlling the scraping brush 609 at the bottom of the right triangular scraping plate 604 to rotate counterclockwise for cleaning, and sweeping the impurities from the center of the two triangular scraping plates 604 to the outside. The wheel body of the gear 612 penetrates into the groove, which can prevent the gear 612 from disengaging from the rack 613 and improve the stability during operation.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and 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 present invention.

Claims

1. A pressure test device for concrete detection, characterized in that, Comprising: A sample stage (1), the upper part of the sample stage (1) is connected to a cylinder mounting plate (3) through a plurality of longitudinally arranged optical axes (2), a pressurizing cylinder (4) is connected to the cylinder mounting plate (3), the output end of the pressurizing cylinder (4) is connected to a pressing plate (5) slidably mounted on the plurality of optical axes (2), and a pressure sensor is provided between the pressing plate (5) and the output end of the pressurizing cylinder (4); A cleaning mechanism (6) is connected to the pressing plate (5) for cleaning the lower surface of the pressing plate (5), the upper surface of the sample stage (1), and the upper surface of the concrete sample placed on the sample stage (1).

2. A pressure test device for concrete detection according to claim 1, characterized in that, Also comprising: A surrounding cover structure (7) mounted on the sample stage (1); The surrounding cover structure (7) includes: A rectangular surrounding frame (701) arranged around the outside of the sample stage (1) and the pressing plate (5), the rectangular surrounding frame (701) is fixed to the tops of a plurality of lifting cylinders (702), and the bottoms of the plurality of lifting cylinders (702) are mounted on the side of the sample stage (1) through cylinder seats.

3. The pressure test device for concrete detection according to claim 1, wherein, The pressing plate (5) includes: An upper plate body (501) slidably mounted on the plurality of optical axes (2), the top of the upper plate body (501) is connected to the output end of the pressurizing cylinder (4), and the bottom of the upper plate body (501) is connected to a lower plate body (502) for pressing on the upper surface of the concrete sample.

4. A pressure test device for concrete detection according to claim 3, characterized in that, The cleaning mechanism (6) includes: An inverted triangular frame (601), a movable cleaning frame (602), and a return compression spring (603); The inverted triangular frame (601) is fixedly mounted above the upper plate body (501) through a connecting seat; There are two movable cleaning frames (602), and the relative sides of the two movable cleaning frames (602) are slidably connected in the L-shaped slideways at the front and rear ends of the upper plate body (501). After the two movable cleaning frames (602) are butted, the bottom forms an inverted triangular structure. One or more return compression springs (603) are fixed between the front and rear ends of each movable cleaning frame (602) and the inner side walls of the two L-shaped slideways.

5. The pressure test device for concrete detection according to claim 4, characterized in that, The movable cleaning frame (602) includes: A triangular scraping plate (604), the triangular scraping plate (604) is connected to the bottoms of two longitudinal beams (605), the tops of the two longitudinal beams (605) are connected to two L-shaped sliders (606), and the two L-shaped sliders (606) are fixedly connected to the inner side walls of the two L-shaped slideways through the return compression spring (603). The horizontal blocks of the two L-shaped sliders (606) are respectively slidably fitted in the lower slideways of the two L-shaped slideways of the upper plate body (501), and the vertical blocks of the two L-shaped sliders (606) are respectively slidably fitted in the upper slideways of the two L-shaped slideways of the upper plate body (501); The top of the longitudinal beam (605) is in contact and cooperation with one side inclined surface of the inverted triangular frame (601), and there is a gap between the two longitudinal beams (605) of the two movable cleaning frames (602); The bottoms of the two triangular scraping plates (604) of the two movable cleaning frames (602) are butted to form an equilateral triangular structure.

6. The pressure test device for concrete detection according to claim 5, wherein, The longitudinal beam (605) includes: a longitudinal support body (605a) slidably connected in the longitudinal slideway of the transverse block body, the bottom of the longitudinal support body (605a) is fixed on the triangular scraping plate (604), the top of the longitudinal support body (605a) is fixedly connected to the top block (605b), and a fillet is provided at the contact between the top block (605b) and the inclined surface on one side of the inverted triangular frame (601); the top block (605b) is fixedly connected to the top of the longitudinal axis (605c), the middle of the longitudinal axis (605c) is slidably fitted on the transverse plate (605d) on the side of the transverse block body, the bottom of the longitudinal axis (605c) is connected to the triangular scraping plate (604), and a tension spring (605e) is sleeved on the shaft body of the longitudinal axis (605c) between the transverse plate (605d) and the triangular scraping plate (604).

7. A pressure test device for concrete detection according to claim 6, characterized in that, The movable cleaning frame (602) further includes: an upper scraping plate (607) slidably fitted on the lower surface of the lower plate body (502), the upper scraping plate (607) is connected to the bottom of the transverse block bodies of two L-shaped sliders (606), and the upper scraping plate (607) is inserted into the longitudinal slideways of the two longitudinal support bodies (605a).

8. A pressure test device for concrete detection according to claim 7, characterized in that, An upper scraping groove is provided on the outer side of the top of the upper scraping plate (607), and the bottom surface of the upper scraping groove is a material guiding inclined surface that slopes from the middle of the lower plate body (502) to the outside of the lower plate body (502).

9. The pressure test device for concrete detection according to claim 5, wherein, A scraping groove is provided on the outer side of the bottom of the triangular scraping plate (604), a transverse shaft (608) is rotatably connected in the scraping groove, a scraping roller brush (609) is fixed on the shaft body of the transverse shaft (608) located in the scraping groove, the horizontal height of the bottom of the scraping roller brush (609) is not higher than the horizontal height of the bottom of the triangular scraping plate (604), a driven belt pulley (610) is fixed on the shaft body of the transverse shaft (608) protruding to the outside of the triangular scraping plate (604), the driven belt pulley (610) is connected by a belt drive to a driving belt pulley (611) fixed on the wheel shaft, and the wheel shaft is rotatably connected to the longitudinal beam (605); a gear (612) fixed on the wheel shaft meshes with a rack (613) connected to the inclined surface on one side of the inverted triangular frame (601).

10. A pressure test device for concrete detection according to claim 9, characterized in that, The rack (613) is installed in the groove on the inclined surface on one side of the inverted triangular frame (601), and the wheel body of the gear (612) penetrates into the groove.

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