Material detection device for municipal engineering construction

Abstract

The invention relates to the technical field of detection devices, in particular to a material detection device for municipal engineering construction. According to the invention, air tightness detection can be rapidly carried out on pipes with different pipe diameters, the two ends of the pipes can be sealed more tightly, the phenomenon of air leakage at the two ends of the pipes in the detection process is effectively prevented, and thus the accuracy of the detection result is improved. The device comprises a base, supports are symmetrically arranged on the two sides of the top of the base, at least two electric push rods are installed on each support, telescopic shafts of the electric push rods are connected with an auxiliary frame, an inflator pump and symmetrically-distributed installation frames are arranged on the top of the base, and a supporting mechanism is arranged on the auxiliary frame and comprises a supporting assembly capable of being adjusted in the radial direction. The installation frame is provided with a detection mechanism, and the detection mechanism comprises a sealing assembly communicated with the inflator pump. The two ends of a pipe can be stably placed through the multiple supporting plates, and the rubber sleeves can wrap the two ends of the pipe and seal the pipe, so that airtightness detection can be conducted on pipes with different diameters.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and in particular to a material detection device for municipal engineering construction. Background Art

[0002] Municipal engineering generally refers to some urban infrastructure construction projects, including the laying of some drainage and gas pipelines. When laying pipelines, in order to ensure that the construction materials meet the relevant requirements and can operate for a long period of time after adding materials, it is necessary to conduct random inspections on the pipeline materials used in advance. Among them, the air tightness test of the pipes is one of the acceptance criteria. By checking the air tightness of the pipes through air tightness tests, its safety under normal operating pressure can be determined.

[0003] However, the existing testing equipment may encounter the following problems when testing the air tightness of pipes:

[0004] 1. Some existing testing equipment can only test pipes of a fixed diameter. If pipes of different diameters need to be tested, the testing components of the equipment need to be manually adjusted or replaced, making the pipe testing more troublesome and the testing efficiency low.

[0005] 2. When some existing equipment is testing the air tightness of pipes, if the cross-section surfaces at both ends of the pipes are not flat enough, it is easy for the testing components to not seal the pipes tightly, which may cause the pipes to leak during the air tightness test, thereby affecting the accuracy of the test results.

[0006] Therefore, there is an urgent need to develop a material testing device for municipal engineering construction, which can quickly perform air tightness testing on pipes of different diameters, improve the testing efficiency, and seal both ends of the pipe more tightly, effectively preventing air leakage at both ends of the pipe during the testing process, thereby improving the accuracy of the test results. Summary of the Invention

[0007] In order to solve the problems raised in the above background technology, the present invention provides a material testing device for municipal engineering construction, which can quickly perform air tightness testing on pipes of different diameters and can seal both ends of the pipe more tightly, effectively preventing air leakage at both ends of the pipe during the testing process.

[0008] To solve the above technical problems, the technical solution adopted by the present invention is: a material detection device for municipal engineering construction, including a base, characterized in that: a motion mechanism is symmetrically arranged at both ends of the base, and each motion mechanism includes a bracket and a mounting frame. Each bracket is provided with at least two electric push rods; the mounting frame includes a detection mechanism; at least one air pump, and the detection mechanism includes a sealing component that can communicate with the air pump; wherein, the telescopic shaft of the electric push rod is connected to an auxiliary frame, and a support mechanism is provided on the auxiliary frame. The support mechanism includes a support component that can move radially relative to the pipe; through the support mechanism, the detection mechanism is driven by the lifting of the electric push rod to form an axial seal at the end of the pipe, and / or, through the support mechanism and the detection mechanism, the pipe is synchronously adjusted in the radial direction.

[0009] Preferably, the support mechanism includes a transmission plate arranged on the auxiliary frame. There are at least two transmission plates and they are symmetrically distributed. Each transmission plate is slidably connected with a push frame. A limiting groove is formed on each push frame. A push spring is connected between the transmission plate and the push frame. Each mounting frame is rotatably connected with a transmission ring. A plurality of sliding grooves are formed on each transmission ring. Each transmission ring is provided with a push rod. The push rod is slidably connected with the limiting groove of the push frame. The support component includes a plurality of guide frames arranged on the mounting frame. At least two support plates are slidably connected to each guide frame. The ratio of the number of support plates to the number of sliding grooves is 1:1. The transmission ring is slidably connected with the limiting groove of the push frame through the push rod. The rotation angle of the transmission ring is linearly related to the radial displacement of the support plate. And the radial adjustment range of the support plate is 30 - 200 mm to adapt to different pipe diameters.

[0010] Preferably, the detection mechanism includes support frames symmetrically arranged on the mounting frame. A plurality of support frames on the side close to the air pump are in a group, and a plurality of support frames on the side far from the air pump are in a group. An installation ring is slidably connected to each group of support frames. A return spring is connected between the installation ring and each support frame. A diversion frame is fixedly installed on each installation ring. A hose is connected to the air outlet of the air pump, and the hose is connected to the diversion frame on the side close to the air pump. The sealing component includes a safety pressure relief valve arranged on the diversion frame on the side far from the air pump. An inclined surface rod frame is arranged on each auxiliary frame. A long inclined surface is provided on the upper part of each inclined surface rod frame. A pressure sensor is arranged on the inner wall of the diversion frame on the side close to the air pump. A rubber sleeve is arranged on each installation ring.

[0011] Preferably, the rubber sleeve includes an arc-shaped main body structure extending axially. The radial cross-section of the main body structure is a periodically continuous waveform structure, which is composed of at least three continuously distributed wave peaks and wave valleys. The height difference between the wave peak and the wave valley of the waveform structure of the rubber sleeve is 5-15 mm, the period length is 20-50 mm, and the waveform structure is made of silica gel material.

[0012] Preferably, it further includes a control module, which is electrically connected to the electric push rod, the air pump and the pressure sensor, and is used to automatically adjust the stroke of the electric push rod and the output pressure of the air pump according to the diameter of the pipe.

[0013] Preferably, it further includes an auxiliary sealing mechanism, which is arranged on the mounting ring. The auxiliary sealing mechanism includes a support rod frame, which is symmetrically arranged on the mounting ring. A plurality of the support rod frames on the side close to the air pump are in a group, and a plurality of the support rod frames on the side far from the air pump are in a group. A ring-shaped base body is fixedly installed on each group of the support rod frames. The ring-shaped base body is sleeved outside the mounting ring and does not contact the outer wall of the mounting ring. A plurality of radial limiting components are arranged on each ring-shaped base body. The radial limiting component includes a retracted limiting block and an expanded limiting block. An outer wall extrusion frame is slidably connected to each retracted limiting block. Each outer wall extrusion frame is slidably connected to the mounting ring, and each outer wall extrusion frame contacts the rubber sleeve. An inner wall extrusion frame is slidably connected to each expanded limiting block. Each inner wall extrusion frame is slidably connected to the mounting ring, and each inner wall extrusion frame contacts the rubber sleeve. A slope push frame is arranged on the upper part of each slope rod frame. The slope push frame is located below the long slope of the slope rod frame, and a short slope is arranged on the slope push frame.

[0014] Preferably, the retracted limiting block extends from the ring-shaped base body towards the axis direction to form a retracted protrusion, and the expanded limiting block extends from the ring-shaped base body towards the direction away from the axis to form an expanded protrusion. The retracted limiting blocks and the expanded limiting blocks are alternately distributed along the circumferential direction of the ring-shaped base body, and the included angle between the moving directions of the retracted limiting block and the expanded limiting block is 15-90°, forming a double-direction extrusion seal.

[0015] Preferably, a plurality of extrusion blocks one are arranged on the outer wall extrusion frame. The extrusion blocks one extrude the outer diameter wall of the pipe through the rubber sleeve, so that the rubber sleeve fully fits the outer diameter wall of the pipe. A plurality of extrusion blocks two are arranged on the inner wall extrusion frame. The extrusion blocks two extrude the inner diameter wall of the pipe through the rubber sleeve, so that the rubber sleeve fully fits the inner diameter wall of the pipe.

[0016] Preferably, a hydraulic cylinder is provided at the middle position of the base along the horizontal direction. A rubber pad is sleeved on the telescopic shaft of the hydraulic cylinder. The maximum output pressure of the hydraulic cylinder is 10 MPa. The contact surface of the rubber pad is of a serrated structure, which is used to simulate the airtightness change of the pipe under external loads.

[0017] Preferably, the support bar is detachably connected to the transmission ring through a magnetic buckle. The material of the support bar is lightweight aluminum alloy, and the surface is plated with an anti-corrosion layer. A wiping strip is provided on each support bar. The wiping strip is made of polyurethane material, and the surface is provided with a nano-level anti-sticking coating, which is used to remove debris on the cross-section of the pipe, and the wiping pressure can be adjusted by the rotation angle of the transmission ring.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. The push frame pushes the transmission ring to rotate, so that multiple support plates move towards each other and support both ends of the pipe, enabling the two ends of the pipe to be placed stably. The rubber sleeve moves and the two ends of the pipe are clamped between one of the wave crests and wave troughs of the rubber sleeve, so as to quickly perform airtightness detection on pipes with different diameters. Moreover, the rubber sleeve can wrap the inner diameter wall and outer diameter wall at both ends of the pipe, and thus better fit the cross-section, inner diameter wall and outer diameter wall at both ends of the pipe, so that the rubber sleeve seals the pipe. At the same time, the air pump injects high-pressure air into the pipe, and thus the airtightness detection of pipes with different diameters is carried out through the above operations. Compared with the prior art, through the linkage design of the electric push rod and the transmission ring in the present invention, the adjustment time for different pipe diameters can be shortened to within 10 seconds, and the detection efficiency is greatly improved.

[0020] 2. The inclined surface push frame moves upward and pushes the support rod frame to move towards the side close to the pipe, so that a plurality of inwardly retractable limit blocks and a plurality of outwardly expanding limit blocks move together, and then push the outer wall extrusion frame and the inner wall extrusion frame to move, and make the inner wall extrusion frame and the outer wall extrusion frame extrude the wave crest part and wave trough part of the rubber sleeve, so that the rubber sleeve fits more tightly with the inner diameter wall and outer diameter wall of the pipe, effectively preventing air leakage at both ends of the pipe during the airtightness detection process. Thus, through the synergistic effect of the rubber sleeve and the auxiliary sealing mechanism, the sealing contact area is increased by 30%, and the air leakage rate is reduced to less than 0.1%, which is significantly better than the traditional planar sealing structure, so as to improve the accuracy of the airtightness detection result of the pipe material.

[0021] 3. The wiping strip will wipe the cross-section of the pipe, causing some debris on the cross-section of the pipe to fall off, thereby enabling the cross-section of the pipe to fit more closely with the rubber sleeve. During the airtightness detection of the pipe, the telescopic shaft of the hydraulic cylinder extends, causing the rubber pad to contact the outer wall of the pipe and extruding the outer wall of the pipe. The cooperation of the hydraulic cylinder and the pressure sensor can simulate the airtightness change of the pipe under an external pressure of 5-10 MPa, realizing dynamic load detection, and then detecting whether the airtightness of the pipe is affected during the process of being extruded by external forces, making the detection more comprehensive. Brief Description of the Drawings

[0022] Figure 1 It is the first three-dimensional structure schematic diagram of the present invention.

[0023] Figure 2 It is the second three-dimensional structure schematic diagram of the present invention.

[0024] Figure 3 It is the first partial three-dimensional structure schematic diagram of the present invention.

[0025] Figure 4 For the present invention Figure 3 The enlarged three-dimensional structure schematic diagram of A in it.

[0026] Figure 5 It is the second partial three-dimensional structure schematic diagram of the present invention.

[0027] Figure 6 It is the first partial three-dimensional structure schematic diagram of the detection mechanism and the auxiliary airtight mechanism of the present invention.

[0028] Figure 7 It is the second partial three-dimensional structure schematic diagram of the detection mechanism and the auxiliary airtight mechanism of the present invention.

[0029] Figure 8 It is the first partial sectional three-dimensional structure schematic diagram of the detection mechanism and the auxiliary airtight mechanism of the present invention.

[0030] Figure 9 It is the partial sectional three-dimensional structure schematic diagram of the detection mechanism of the present invention.

[0031] Figure 10 It is the second partial sectional three-dimensional structure schematic diagram of the detection mechanism and the auxiliary airtight mechanism of the present invention.

[0032] Figure 11 It is the partial disassembled three-dimensional structure schematic diagram of the auxiliary airtight mechanism of the present invention.

[0033] In the accompanying drawings: 1. Base; 2. Bracket; 3. Electric push rod; 31. Auxiliary frame; 4. Inflation pump; 5. Mounting frame; 501-. Transmission plate; 502. Pushing frame; 503. Pushing spring; 504. Transmission ring; 505. Pushing rod; 506. Guide frame; 507. Support plate; 61. Support frame; 62. Mounting ring; 63. Return spring; 64. Flow guiding frame; 65. Hose; 66. Safety pressure relief valve; 67. Inclined surface rod frame; 68. Pressure sensor; 69. Rubber sleeve; 71. Support rod frame; 72. Ring-shaped matrix; 73. Retracted limit block; 74. Expanded limit block; 75. Outer wall extrusion frame; 76. Inner wall extrusion frame; 77. Inclined surface pushing frame; 81. Hydraulic cylinder; 82. Rubber pad; 91. Support strip; 92. Wiping strip. Detailed implementation mode

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] The technical solutions of the present invention will be further specifically described below through specific embodiments and in combination with the accompanying drawings:

[0036] Embodiment 1: A material detection device for municipal engineering construction, as Figures 1-9 shown, includes a base 1, a moving mechanism, which is symmetrically arranged at both ends of the base 1. Each moving mechanism includes a bracket 2 and a mounting frame 5. Each bracket 2 is provided with at least two electric push rods 3; the mounting frame 5 includes a detection mechanism; at least one inflation pump 4, and the detection mechanism includes a sealing assembly that can communicate with the inflation pump 4; wherein, the telescopic shaft of the electric push rod 3 is connected to the auxiliary frame 31, and a support mechanism is provided on the auxiliary frame 31. The support mechanism includes a support assembly that can move radially relative to the pipe; through the support mechanism, the detection mechanism is driven by the lifting of the electric push rod 3 to form an axial seal at the end of the pipe, and / or, through the support mechanism and the detection mechanism, the pipe is synchronously adjusted in the radial direction.

[0037] The support mechanism includes drive plates 501 arranged on the auxiliary frame 31. There are at least two drive plates 501 and they are symmetrically distributed. A push frame 502 is slidably connected to each drive plate 501. A limit groove is formed on each push frame 502. A push spring 503 is connected between the drive plate 501 and the push frame 502. A drive ring 504 is rotatably connected to each mounting frame 5. A plurality of sliding grooves are formed on each drive ring 504. A push rod 505 is arranged on each drive ring 504. The push rod 505 is slidably connected to the limit groove of the push frame 502. The support assembly includes a plurality of guide frames 506 arranged on the mounting frame 5. At least two support plates 507 are slidably connected to each guide frame 506. The ratio of the number of support plates 507 to the number of sliding grooves is 1:1. The drive ring 504 is slidably connected to the limit groove of the push frame 502 through the push rod 505. The rotation angle of the drive ring 504 has a linear relationship with the radial displacement of the support plate 507. And the radial adjustment range of the support plate 507 is 30 - 200 mm to adapt to different pipe diameters.

[0038] The detection mechanism includes support frames 61 symmetrically arranged on the mounting frame 5. A plurality of support frames 61 close to the air pump 4 are in one group, and a plurality of support frames 61 far from the air pump 4 are in another group. An installation ring 62 is slidably connected to each group of support frames 61. A return spring 63 is connected between the installation ring 62 and each support frame 61. A diversion frame 64 is fixedly installed on each installation ring 62. A hose 65 is connected to the air outlet of the air pump 4. The hose 65 is connected to the diversion frame 64 close to the air pump 4. The sealing assembly includes a safety pressure relief valve 66 arranged on the diversion frame 64 far from the air pump 4, which automatically relieves pressure when the detected pressure exceeds the set threshold to prevent the pipe from bursting. An inclined plane rod frame 67 is arranged on each auxiliary frame 31. A long inclined plane is arranged on the upper part of each inclined plane rod frame 67. A pressure sensor 68 is arranged on the inner wall of the diversion frame 6 near the air pump 4. A rubber sleeve 69 is arranged on each installation ring 62.

[0039] The rubber sleeve 69 includes an arc-shaped main body structure extending along the axis. The radial cross-section of the main body structure is a periodically continuous waveform structure. The waveform structure is composed of at least 3 continuously distributed wave peaks and wave valleys. The height difference between the wave peak and the wave valley of the waveform structure of the rubber sleeve 69 is 5 - 15 mm, the period length is 20 - 50 mm, and the waveform structure is made of silica gel material with a hardness of Shore A 40 - 60.

[0040] It further includes a control module, which is electrically connected to the electric push rod 3, the air inflation pump 4 and the pressure sensor 68, and is used to automatically adjust the stroke of the electric push rod 3 and the output pressure of the air inflation pump 4 according to the diameter of the pipe.

[0041] At first, the control module is associated with the airtight detection system of the external device. The staff places a section of pipe to be detected for airtightness between the two transmission rings 504, and then starts the control module. The contraction of the telescopic shaft of the electric push rod 3 will drive the auxiliary frame 31, the transmission plate 501, the pushing frame 502 and the inclined plane rod frame 67 to move upward together. The upward movement of the pushing frame 502 will push the transmission ring 504 to rotate a certain angle through the push rod 505. The rotation of the transmission ring 504 will push multiple support plates 507 to move towards each other. The movement of multiple support plates 507 will contact the outer wall of the pipe and stop moving. Then, when the transmission plate 501 continues to move upward, the pushing spring 503 will be compressed. Under the elastic force of the pushing spring 503, multiple support plates 507 will squeeze the outer walls at both ends of the pipe, thereby supporting both ends of the pipe and enabling the pipe to be placed stably. The upward movement of the inclined plane rod frame 67 will cause the long inclined plane to contact the mounting ring 62 and push the two mounting rings 62 to move towards each other. The return spring 63 is compressed. The movement of the mounting ring 62 will cause the rubber sleeve 69 to move and contact the pipe, so that both ends of the pipe are caught between one of the wave crests and wave troughs of the rubber sleeve 69. Since the rubber sleeve 69 has multiple continuously distributed wave crests and wave troughs, it can adapt to pipes of different diameters, so as to quickly detect the airtightness of pipes with different diameters. Moreover, the rubber sleeve 69 has good elastic deformation ability when compressed, and can wrap the inner diameter wall and outer diameter wall at both ends of the pipe, and thus fit more closely to the cross section, inner diameter wall and outer diameter wall at both ends of the pipe, so that the rubber sleeve 69 seals the pipe. Then, when the inclined plane rod frame 67 continues to move upward, the long inclined plane will break away from the contact with the mounting ring 62, and the mounting ring 62 will stop moving. At the same time, when the air inflation pump 4 is started, high-pressure air will be introduced into the pipe through the hose 65, the diversion frame 64 and the mounting ring 62. Then, the pressure sensor 68 will detect the air pressure in the pipe, so as to detect the airtightness of pipes with different diameters through the above operations; when the airtightness detection of the pipe is completed, the staff will turn off the electric push rod 3 and the air inflation pump 4, and open the safety relief valve 66 to slowly discharge the high-pressure gas in the pipe. The reset of the telescopic shaft of the electric push rod 3 will drive the auxiliary frame 31, the transmission plate 501, the pushing frame 502 and the inclined plane rod frame 67 to reset downward. The pushing spring 503 resets. The downward reset of the inclined plane rod frame 67 will break away from the contact with the mounting ring 62. The return spring 63 resets and drives the mounting ring 62 and the rubber sleeve 69 to reset. The downward reset of the pushing frame 502 will push the transmission ring 504 to reverse through the push rod 505 and push multiple support plates 507 to reset. The reset of multiple support plates 507 will break away from the contact with the pipe, and thus no longer support the pipe. Finally, the staff will take out the pipe.

[0042] Example 2: Based on Example 1, Figures 3-11 As shown, an auxiliary sealing mechanism is also included, and the auxiliary sealing mechanism is arranged on the mounting ring 62. The auxiliary sealing mechanism includes a support rod frame 71, and the support rod frame 71 is symmetrically arranged on the mounting ring 62. The multiple support rod frames 71 on the side close to the air pump 4 are a group, and the multiple support rod frames 71 on the side away from the air pump 4 are a group. An annular base 72 is fixedly installed on each group of the support rod frames 71, and the annular base 72 is sleeved on the outside of the mounting ring 62 and does not contact the outer wall of the mounting ring 62. A plurality of radial limit assemblies are provided on each of the annular bases 72, and the radial limit assemblies include an inward limit block 73 and The outward expansion limit block 74, each of the inward contraction limit blocks 73 is slidably connected to an outer wall extrusion frame 75, each of the outer wall extrusion frames 75 is slidably connected to the mounting ring 62, and each of the outer wall extrusion frames 75 is in contact with the rubber sleeve 69, each of the outward expansion limit blocks 74 is slidably connected to an inner wall extrusion frame 76, each of the inner wall extrusion frames 76 is slidably connected to the mounting ring 62, and each of the inner wall extrusion frames 76 is in contact with the rubber sleeve 69, and an inclined push frame 77 is provided on the upper part of each inclined rod frame 67, and the inclined push frame 77 is located below the long inclined surface of the inclined rod frame 67, and a short inclined surface is provided on the inclined push frame 77.

[0043] The inward-retracting limit block 73 extends from the annular base 72 toward the axial direction to form an inward-retracting protrusion, and the outward-expanding limit block 74 extends from the annular base 72 toward the direction away from the axial direction to form an outward-expanding protrusion. The inward-retracting limit block 73 and the outward-expanding limit block 74 are alternately distributed along the circumference of the annular base 72, and the angle between the moving directions of the inward-retracting limit block 73 and the outward-expanding limit block 74 is 15-90°, forming a bidirectional extrusion seal.

[0044] The outer wall extrusion frame 75 is provided with a plurality of extrusion blocks 1, which extrude the outer diameter wall of the pipe through the rubber sleeve 69 so that the rubber sleeve 69 fully fits the outer diameter wall of the pipe. The inner wall extrusion frame 76 is provided with a plurality of extrusion blocks 2, which extrude the inner diameter wall of the pipe through the rubber sleeve 69 so that the rubber sleeve 69 fully fits the inner diameter wall of the pipe.

[0045] During the upward movement of the inclined plane rod frame 67, it drives the inclined plane push frame 77 to move upward. When the mounting ring 62 is pushed and moves toward the side close to the pipe, it drives the support rod frame 71, the annular base body 72, the retracting limit block 73, the expanding limit block 74, the outer wall extrusion frame 75, and the inner wall extrusion frame 76 to move together. When the long inclined plane of the inclined plane rod frame 67 disengages from contact with the mounting ring 62 and the mounting ring 62 stops moving, the continuous upward movement of the inclined plane push frame 77 causes the short inclined plane to contact the support rod frame 71 and pushes the support rod frame 71 to move toward the side close to the pipe. The movement of the support rod frame 71 drives the annular base body 72, multiple retracting limit blocks 73, and multiple expanding limit blocks 74 to move together. The movement of the retracting limit blocks 73 and the expanding limit blocks 74 drives the outer wall extrusion frame 75 and the inner wall extrusion frame 76 to move, and causes the inner wall extrusion frame 76 and the outer wall extrusion frame 75 to squeeze the peak and valley parts of the rubber sleeve 69, making the rubber sleeve 69 fit more tightly against the inner diameter wall and the outer diameter wall of the pipe, effectively preventing air leakage at both ends of the pipe during the airtightness detection process, thereby improving the accuracy of the airtightness detection results of the pipe material; when the inclined plane rod frame 67 resets, it drives the inclined plane push frame 77 to reset, and when the mounting ring 62 resets, it drives the support rod frame 71, the annular base body 72, the retracting limit block 73, the expanding limit block 74, the outer wall extrusion frame 75, and the inner wall extrusion frame 76 to reset together.

[0046] Embodiment 3: On the basis of Embodiment 1, as Figures 1-3 shown, a hydraulic cylinder 81 is provided at the middle position of the base 1 in the horizontal direction. A rubber pad 82 is sleeved on the telescopic shaft of the hydraulic cylinder 81. The maximum output pressure of the hydraulic cylinder 81 is 10 MPa. The contact surface of the rubber pad 82 is of a serrated structure, which is used to simulate the airtightness change of the pipe under external loads.

[0047] The support strip 91 is detachably connected to the transmission ring 504 through a magnetic buckle, and the material of the support strip 91 is lightweight aluminum alloy with an anti-corrosion layer plated on the surface. A wiping strip 92 is provided on each support strip 91. The wiping strip 92 is made of polyurethane material and has a nano-level anti-sticking coating on the surface, which is used to remove debris on the cross-section of the pipe, and the wiping pressure can be adjusted by the rotation angle of the transmission ring 504.

[0048] When the pipe is placed between the two transmission rings 504, both ends of the pipe will contact the wiping strips 92 on both sides respectively. The wiping strips 92 will wipe the cross-section of the pipe, causing some debris on the cross-section of the pipe to fall off, and thus enabling the cross-section of the pipe to fit more closely with the rubber sleeve 69.

[0049] During the process of airtightness detection of the pipe, the staff can start the hydraulic cylinder 81. The elongation of the telescopic shaft of the hydraulic cylinder 81 will cause the rubber pad 82 to contact the outer wall of the pipe and extrude the outer wall of the pipe, thereby detecting whether the airtightness of the pipe is affected during the process of being extruded by an external force, making the detection more comprehensive.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A material testing device for municipal engineering construction, including a base (1), characterized in that: A motion mechanism is arranged at both ends of the base (1) symmetrically. Each motion mechanism includes a bracket (2) and a mounting frame (5). Each bracket (2) is provided with at least two electric push rods (3); the mounting frame (5) includes a detection mechanism; At least one air pump (4), and the detection mechanism includes a sealing component that can communicate with the air pump (4); Wherein, the telescopic shaft of the electric push rod (3) is connected to an auxiliary frame (31), and a support mechanism is arranged on the auxiliary frame (31). The support mechanism includes a support component that can move radially relative to the pipe; The support mechanism drives the detection mechanism through the lifting of the electric push rod (3) to form an axial seal at the end of the pipe, and / or, the support mechanism and the detection mechanism synchronously adjust the pipe in the radial direction.

2. The material testing device for municipal engineering construction according to claim 1, wherein: The support mechanism includes a transmission plate (501) arranged on the auxiliary frame (31). There are at least two transmission plates (501) and they are symmetrically distributed. Each transmission plate (501) is slidably connected with a push frame (502). Each push frame (502) is provided with a limit groove. A push spring (503) is connected between the transmission plate (501) and the push frame (502). Each mounting frame (5) is rotatably connected with a transmission ring (504). Each transmission ring (504) is provided with a plurality of sliding grooves. Each transmission ring (504) is provided with a push rod (505). The push rod (505) is slidably connected with the limit groove of the push frame (502). The support component includes a plurality of guide frames (506) arranged on the mounting frame (5). Each guide frame (506) is slidably connected with at least two support plates (507). The ratio of the number of support plates (507) to the number of sliding grooves is 1:

1. The transmission ring (504) is slidably connected with the limit groove of the push frame (502) through the push rod (505). The rotation angle of the transmission ring (504) is linearly related to the radial displacement of the support plate (507), and the radial adjustment range of the support plate (507) is 30 - 200 mm to adapt to different pipe diameters.

3. The material testing device for municipal engineering construction according to claim 2, characterized in that: The detection mechanism includes support frames (61) symmetrically arranged on the mounting frame (5). A plurality of the support frames (61) on the side close to the air inflation pump (4) form a group, and a plurality of the support frames (61) on the side far from the air inflation pump (4) form a group. An installation ring (62) is slidably connected to each group of the support frames (61). A return spring (63) is connected between the installation ring (62) and each of the support frames (61). A diversion frame (64) is fixedly installed on each of the installation rings (62). A hose (65) is communicated with the air outlet of the air inflation pump (4), and the hose (65) is communicated with the diversion frame (64) on the side close to the air inflation pump (4). The sealing assembly includes a safety pressure relief valve (66) arranged on the diversion frame (64) on the side far from the air inflation pump (4). An inclined plane rod frame (67) is arranged on each of the auxiliary frames (31). Each upper part of the inclined plane rod frame (67) is provided with a long inclined plane. A pressure sensor (68) is arranged on the inner wall of the diversion frame (64) on the side close to the air inflation pump (4). A rubber sleeve (69) is arranged on each of the installation rings (62).

4. A material testing device for municipal engineering construction according to claim 3, characterized in that: The rubber sleeve (69) includes an arc-shaped main body structure extending along the axis. The radial section of the main body structure is a periodically continuous waveform structure. The waveform structure is composed of at least 3 continuously distributed wave peaks and wave valleys. The height difference between the wave peak and the wave valley of the waveform structure of the rubber sleeve (69) is 5 - 15 mm, the period length is 20 - 50 mm, and the waveform structure is made of silica gel material.

5. The material testing device for municipal engineering construction according to claim 3, characterized in that: It further includes a control module, which is electrically connected to the electric push rod (3), the air inflation pump (4) and the pressure sensor (68), and is used to automatically adjust the stroke of the electric push rod (3) and the output pressure of the air inflation pump (4) according to the diameter of the pipe.

6. The material testing device for municipal engineering construction according to claim 3, characterized in that: The auxiliary sealing mechanism is also included, and the auxiliary sealing mechanism is arranged on the mounting ring (62). The auxiliary sealing mechanism includes a support rod frame (71), and the support rod frame (71) is symmetrically arranged on the mounting ring (62). A plurality of the support rod frames (71) on the side close to the air pump (4) are a group, and a plurality of the support rod frames (71) on the side away from the air pump (4) are a group. An annular base (72) is fixedly installed on each group of the support rod frames (71). The annular base (72) is sleeved on the outside of the mounting ring (62) and does not contact the outer wall of the mounting ring (62). A plurality of radial limiting components are provided on each of the annular bases (72), and the radial limiting components include an inward limiting block (73) and an outward limiting block (74), each of the inward-retracting limit blocks (73) is slidably connected to an outer wall extrusion frame (75), each of the outer wall extrusion frames (75) is slidably connected to the mounting ring (62), and each of the outer wall extrusion frames (75) is in contact with the rubber sleeve (69), each of the outward-expanding limit blocks (74) is slidably connected to an inner wall extrusion frame (76), each of the inner wall extrusion frames (76) is slidably connected to the mounting ring (62), and each of the inner wall extrusion frames (76) is in contact with the rubber sleeve (69), and an inclined plane push frame (77) is provided on the upper part of each inclined plane rod frame (67), and the inclined plane push frame (77) is located below the long inclined plane of the inclined plane rod frame (67), and a short inclined plane is provided on the inclined plane push frame (77).

7. A material testing device for municipal engineering construction according to claim 6, characterized in that: The inward-retracting limit block (73) extends from the annular base (72) in the axial direction to form an inward-retracting protrusion, and the outward-expanding limit block (74) extends from the annular base (72) in the direction away from the axial direction to form an outward-expanding protrusion. The inward-retracting limit block (73) and the outward-expanding limit block (74) are alternately distributed along the circumference of the annular base (72), and the angle between the moving directions of the inward-retracting limit block (73) and the outward-expanding limit block (74) is 15-90 degrees, forming a bidirectional extrusion seal.

8. The material testing device for municipal engineering construction according to claim 6, characterized in that: The outer wall extrusion frame (75) is provided with a plurality of extrusion blocks 1, which extrude the outer diameter wall of the pipe through the rubber sleeve (69), so that the rubber sleeve (69) fully fits the outer diameter wall of the pipe. The inner wall extrusion frame (76) is provided with a plurality of extrusion blocks 2, which extrude the inner diameter wall of the pipe through the rubber sleeve (69), so that the rubber sleeve (69) fully fits the inner diameter wall of the pipe.

9. The material testing device for municipal engineering construction according to claim 1, characterized in that: A hydraulic cylinder (81) is provided at a middle position of the base (1) in a horizontal direction, a rubber pad (82) is sleeved on the telescopic shaft of the hydraulic cylinder (81), the maximum output pressure of the hydraulic cylinder (81) is 10 MPa, and the contact surface of the rubber pad (82) is a sawtooth structure, which is used to simulate the change in the airtightness of the pipe under an external load.

10. A material testing device for municipal engineering construction according to claim 2, characterized in that: The support bar (91) is detachably connected to the transmission ring (504) through magnetic buckles. The support bar (91) is made of lightweight aluminum alloy and is coated with an anti-corrosion layer on its surface. A wiping strip (92) is provided on each support bar (91). The wiping strip (92) is made of polyurethane material and is provided with a nano-level anti-sticking coating on its surface, which is used to remove debris on the cross-section of the pipe, and the wiping pressure can be adjusted by the rotation angle of the transmission ring (504).

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