A fitting device for a manhole cover pressure testing machine

Abstract

This invention provides a supporting device for a manhole cover pressure testing machine, belonging to the field of manhole cover pressure testing technology. It includes a support frame, a linear push rod mounted on the upper end of the support frame, a pressure platform mounted on the movable end of the linear push rod, a pressure sensor mounted on the lower end of the support frame, a positioning unit mounted on the upper end of the pressure sensor, a steering unit mounted on one side of the support frame, a lifting unit mounted on the steering unit, and a fastening module mounted on the lifting unit. This invention solves the problem that existing manhole cover pressure testing machines require manual handling of the manhole cover to be tested before testing, and the manhole cover must be removed after testing. This is not only labor-intensive but also inefficient and detrimental to manhole cover testing.

Description

Technical Field

[0001] This invention belongs to the field of manhole cover pressure testing technology, specifically relating to a matching device for a manhole cover pressure testing machine. Background Technology

[0002] Before leaving the factory, manhole covers need to undergo performance testing to ensure they have sufficient pressure-bearing capacity. This is done using a manhole cover pressure testing machine. The manhole cover pressure testing machine includes a lifting platform for holding the manhole cover and a load sensor mounted on the platform. By activating the lifting platform, it moves closer to the load sensor, which then detects the deformation and pressure resistance of the manhole cover.

[0003] Existing manhole cover pressure testing machines require manual handling of the manhole cover to be tested before the test can be performed. After the test is completed, the manhole cover must be removed from the machine. This process is not only labor-intensive but also inefficient and not conducive to the testing of manhole covers. Summary of the Invention

[0004] This invention provides a matching device for a manhole cover pressure testing machine. Its purpose is to solve the problem that existing manhole cover pressure testing machines require manual handling of the manhole cover to be tested before the pressure test is performed, and the manhole cover needs to be removed after the test is completed. This is not only labor-intensive but also inefficient and not conducive to the testing of manhole covers.

[0005] This invention provides a supporting device for a manhole cover pressure testing machine, comprising a bracket, a linear push rod at the upper end of the bracket, a pressure platform at the movable end of the linear push rod, a pressure sensor at the lower end of the bracket, a positioning unit at the upper end of the pressure sensor, a steering unit on one side of the bracket, a lifting unit on the steering unit, and a fastening module on the lifting unit.

[0006] Furthermore, the positioning unit includes a support platform fixed to the pressure sensor. Two pairs of slides are reserved at equal intervals on the support platform. A guide rod is fixed in the slide, and a slide seat is movably mounted on the guide rod. The slide seat is movably connected to the slide. A spiral beryllium copper wire is clamped to the outside of the guide rod. Both sides of the spiral beryllium copper wire are fixed to one side of the slide and the slide seat. A positioning block is fixed to the upper end of the slide seat, and an inclined plate is fixed to the upper end of the positioning block.

[0007] Furthermore, the steering unit includes a base plate fixed to the side of the bracket, a gear one screwed onto the base plate, a support plate fixed to the side of the base plate, a motor one fixed to the upper end of the support plate, a gear two fixed to the rotating part of the motor one, and gear two meshing with gear one.

[0008] Furthermore, the lifting unit includes a slide rail fixed to the upper end of the gear one, one side of the inner side of the slide rail is screwed to the lead screw one, the other side of the inner side of the slide rail is fixed to the guide column, the upper end of the slide rail is fixed to the motor two, the rotating part of the motor two is connected to the lead screw one, a sliding table is movably mounted on the inner side of the slide rail, the sliding table is connected to the lead screw one, the sliding table is movably connected to the guide column, a linear push rod two is fixed to the sliding table, and the movable end of the linear push rod two is fixed to the concave frame.

[0009] Furthermore, the fastening module includes an assembly base, an assembly platform is installed at the bottom of the assembly base, a pair of movable platforms are fixedly connected to the lower wall of the assembly platform, a movable seat is movably installed on the movable platform, a fastening platform for fastening the manhole cover is fixedly connected to the bottom of the movable seat, a linear push rod three is fixedly connected to the top of the assembly base, a movable block one is fixedly connected to the movable end of the linear push rod three, a reinforcing member is installed at the bottom of the movable block one, the reinforcing member achieves the purpose of cleaning the manhole cover before fastening it by changing the position of the movable block and the box body, and an auxiliary component is installed inside the fastening platform, the auxiliary component changes its state by contacting the manhole cover with its elastic plate to adjust the resistance during fastening; The auxiliary component includes a silicone platform, which is fixed inside the fastening platform. The two sides of the lower end of the fastening platform are inclined inward. An elastic sheet is fixed to the inner edge of the fastening platform. A round opening is reserved on the elastic sheet. A silicone protrusion is fixed to the wall of the silicone platform. The silicone platform and the elastic sheet fit together. The round openings on the silicone protrusion and the elastic sheet correspond to each other. The elastic sheet changes shape due to the compression of the manhole cover and comes into contact with the outer surface of the manhole cover. The silicone protrusion is enlarged due to the compression of the elastic sheet. The reinforcement includes a connecting post, which is fixed to the bottom of the first movable block. An assembly block is fixed to the bottom of the connecting post. A connecting strip is fixed between the assembly block and the movable block. Several engagement blocks are installed on the connecting strip. A second lead screw is screwed onto the assembly table. A rotating disk is fixed to the second lead screw. Several engagement slots are pre-drilled on the rotating disk. When the connecting strip moves upwards, and the rotating disk and the connecting strip are aligned, the engagement blocks on the connecting strip and the engagement slots on the rotating disk engage with each other. A movable table is screwed onto the second lead screw. The two sides of the second lead screw... The threads of the assembly block run in opposite directions. The bottom of the movable table is connected to the rotating bar. The fastening plate is fixed in the assembly block. The top of the fastening plate is connected to the housing. The movable block is movably installed in the housing. The constraint block is movably installed on the top of the housing. The constraint block and the rotating bar are screwed together. When the assembly block starts to move upward, the movable block compresses the air inside the housing. When the assembly block moves upward until the engagement block on the connecting bar and the engagement port on the rotating plate engage with each other, the movable block moves upward along the inside of the housing.

[0010] Furthermore, a second variable block is screwed onto the side wall of the variable platform. A groove is reserved at the top of the second variable block, and a transmission port is reserved at the bottom of the second variable block.

[0011] Furthermore, a pressure column is fixedly connected to the side wall of the first variable block, and the pressure column can be movably installed in the trench. A transmission column is fixedly connected to the side wall of the variable seat, and the transmission column can be movably installed in the transmission port.

[0012] The beneficial effects of this invention are as follows: 1. In use, the manhole cover is placed in the desired position. The lifting unit lowers the fastening module to a position where it can fasten the manhole cover. The fastening module fastens the manhole cover. The lifting unit then lifts the fastened manhole cover to the desired height. The steering unit steers the manhole cover above the positioning unit. The lifting unit then drives the manhole cover down onto the positioning unit, which positions the manhole cover. The fastening module then releases the manhole cover. The lifting unit and steering unit work together to reset the fastening module. At this point, a pressure test can be performed. A linear push rod drives the pressure platform down, and the pressure platform holds the manhole cover in place. Continuing the downward pressure, the pressure sensor transmits the pressure value to the external terminal. After the pressure test is completed, the linear push rod drives the pressure platform to reset, the lifting unit drives the fastening module to move upward, the steering unit drives the fastening module to move directly above the manhole cover, and when the lifting unit moves down to the required position, the fastening module fastens the manhole cover after the test is completed. The lifting unit lifts the fastened manhole cover, the steering unit drives the manhole cover to turn, the lifting unit moves the manhole cover down, and the fastening module loosens the manhole cover. There is no need for manual handling of the manhole cover, realizing the automatic up and down movement of the manhole cover, saving time and effort, and greatly improving testing efficiency.

[0013] 2. When the manhole cover is tightened, the linear push rod three moves. At this time, the linear push rod three can pull the first moving block upward. The upward moving moving block one pulls the pressure column to move in the trench. Then, the pressure moving block two rotates around the outer wall of the moving platform. During the rotation of the moving block two, the transmission port drives the transmission column to move. The transmission column pulls the moving seat to move towards the center on the moving platform. The moving seat pulls the tightening platform to approach the manhole cover, achieving the first tightening of the manhole cover. The tightening platform, which can perform orientation adjustment, can achieve the purpose of tightening manhole covers of various specifications, reducing the limitations of the device's use. During the tightening process, the elastic plate on the tightening platform comes into contact with the manhole cover. The pressure of the manhole cover causes the elastic plate to change shape, and the outer surface of the elastic plate and the manhole cover are pressed tightly together. This increases the contact area between the elastic plate and the manhole cover. Furthermore, the change in shape of the elastic plate compresses the silicone platform, causing it to change shape. The silicone platform after the shape change causes the silicone protrusions to expand. Through the silicone protrusions, the obstruction between the silicone plate and the manhole cover is further increased, which can prevent the manhole cover from falling off during the tightening process and ensure the firmness and stability of the tightened manhole cover. During the tightening action, the first moving block moves upwards, and the first moving block pulls the assembly block upwards together via the connecting column. When the assembly block starts to move upwards, it pulls the box body upwards together. At this moment, the position of the moving block remains unchanged. When the box body moves upwards, the moving block compresses the air inside the box body, blowing away the particles on the wall of the manhole cover, ensuring the smoothness of the subsequent tightening, and further ensuring the tightening effect of the assembly block on the manhole cover. When the assembly block moves upwards until the biting block on the connecting strip and the biting mouth on the rotating disc bite each other, the rotating disc drives the screw two to rotate through the bite between the biting block and the biting mouth. The movable table on the screw two moves to both sides. The movable table pulls the constraint block to move through the rotating strip, and then the movable block moves upwards along the inside of the box, adjusting the air pressure intensity in the box so that the fastening disc can tighten the manhole cover, and then tighten the manhole cover onto the assembly block, achieving a firm fastening of the manhole cover and ensuring the firmness during the tightening of the manhole cover.

[0014] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the main structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the positioning unit structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the steering unit and lifting unit structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the fastening module structure according to an embodiment of the present invention; Figure 5 This is a bottom view of the fastening module according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the fastening module according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the variable seat structure according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the trench structure according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the fastening platform structure according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the box structure according to an embodiment of the present invention; Figure 11 This is a schematic cross-sectional view of the box body during fastening in an embodiment of the present invention; Figure 12 This is a schematic diagram of the cross-sectional structure of the box body in an embodiment of the present invention when it is not fastened; Reference numerals: 1. Bracket; 2. Linear push rod one; 3. Pressure table; 4. Pressure sensor; 5. Positioning unit; 6. Steering unit; 7. Lifting unit; 8. Fastening module; 51. Bearing platform; 52. Slide rail; 53. Slide seat; 54. Guide rod; 55. Spiral beryllium copper wire; 56. Positioning block; 57. Inclined plate; 61. Base plate; 62. Gear one; 63. Support plate; 64. Motor one; 65. Gear two; 71. Slide rail; 72. Lead screw one; 73. Guide column; 74. Motor two; 75. Sliding table; 76. Linear push rod two; 77. Concave frame; 81. Assembly base 82. Assembly table; 83. Linear push rod three; 84. Variable block one; 85. Pressure column; 86. Transmission column; 87. Trench; 88. Transmission port; 89. Variable block two; 810. Variable table; 811. Fastening table; 812. Variable seat; 813. Fastening plate; 814. Assembly block; 815. Elastic sheet; 816. Silicone table; 817. Silicone protrusion; 818. Connecting column; 819. Connecting strip; 820. Lead screw two; 821. Movable table; 822. Rotating plate; 823. Box; 824. Rotating strip; 825. Movable block; 826. Constraint block. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0017] Reference Figures 1-12 This invention provides a matching device for a manhole cover pressure testing machine, comprising a bracket 1, a linear push rod 2 mounted on the upper end of the bracket 1, a pressure platform 3 mounted on the movable end of the linear push rod 2, a pressure sensor 4 mounted on the lower end of the bracket 1, a positioning unit 5 mounted on the upper end of the pressure sensor 4, a steering unit 6 mounted on one side of the bracket 1, a lifting unit 7 mounted on the steering unit 6, and a fastening module 8 mounted on the lifting unit 7.

[0018] It should also be noted that pressure sensor 4 is connected to an external terminal and is existing technology, so it will not be described in detail here.

[0019] In use, the manhole cover is placed in the desired position. The lifting unit 7 lowers the fastening module 8 to a position where it can fasten the manhole cover. The fastening module 8 fastens the manhole cover. The lifting unit 7 then lifts the fastened manhole cover to the desired height. The steering unit 6 steers the manhole cover above the positioning unit 5. Next, the lifting unit 7 drives the manhole cover down onto the positioning unit 5. The positioning unit 5 positions the manhole cover. Then, the fastening module 8 releases the manhole cover. The lifting unit 7 and the steering unit 6 work together to drive the fastening module 8 back to its original position. At this point, a pressure test can be performed. The linear push rod 2 drives the pressure platform 3 down, and the pressure platform 3 continuously applies pressure to the manhole cover. When the pressure is applied, the pressure sensor 4 transmits the pressure value to the external terminal. After the pressure test is completed, the linear push rod 2 drives the pressure table 3 to reset, the lifting unit 7 drives the fastening module 8 to move upward, and the steering unit 6 drives the fastening module 8 to move directly above the manhole cover. When the lifting unit 7 moves down to the required position, the fastening module 8 fastens the manhole cover after the test is completed. The lifting unit 7 lifts the fastened manhole cover, the steering unit 6 drives the manhole cover to turn, the lifting unit 7 moves the manhole cover down, and the fastening module 8 loosens the manhole cover. There is no need for manual handling of the manhole cover, which realizes the automatic up and down movement of the manhole cover, saving time and effort and greatly improving the testing efficiency.

[0020] Reference Figure 2 The positioning unit 5 includes a support platform 51 fixed to the pressure sensor 4. Two pairs of slides 52 are reserved at equal intervals on the support platform 51. A guide rod 54 is fixed in the slide 52. A slide seat 53 is movably mounted on the guide rod 54. The slide seat 53 is movably connected to the slide 52. A spiral beryllium copper wire 55 is clamped to the outside of the guide rod 54. Both sides of the spiral beryllium copper wire 55 are fixed to one side of the slide 52 and the slide seat 53. A positioning block 56 is fixed to the upper end of the slide seat 53. An inclined plate 57 is fixed to the upper end of the positioning block 56.

[0021] When the manhole cover is moved directly above the positioning unit 5, the fastening platform 811 on the fastening module 8 is positioned in the gap between the adjacent inclined plates 57. The lifting unit 7 drives the manhole cover fastened on the fastening module 8 to move down. When the manhole cover moves down to contact the inclined plate 57, it continues to move down. Under the pressure of the manhole cover, the inclined plate 57 presses outward, driving the positioning block 56 to move outward. The spiral beryllium copper wire 55 shortens. When the manhole cover moves onto the bearing platform 51, the positioning block 56, with the cooperation of the spiral beryllium copper wire 55, performs a fastening and positioning of the manhole cover. The fastened manhole cover can then undergo a pressure test. After the test is completed, the fastening module 8, the lifting unit 7, and the steering unit 6 work together to remove the manhole cover, realizing automatic loading and unloading of the manhole cover, thereby improving the convenience of testing and saving time and effort.

[0022] Reference Figure 3The steering unit 6 includes a base plate 61 fixed to the side of the bracket 1. A gear 62 is screwed onto the base plate 61. A support plate 63 is fixed to the side of the base plate 61. A motor 64 is fixed to the upper end of the support plate 63. A gear 65 is fixed to the rotating part of the motor 64. The gear 65 and the gear 62 mesh with each other.

[0023] When it is necessary to rotate the fastened manhole cover, motor 64 drives gear 65 to rotate, gear 65 drives gear 62 to rotate, which in turn drives the fastening unit 8 on the lifting unit 7 to rotate, ensuring that the manhole cover can be placed on the positioning unit 5, and also ensuring that the manhole cover can be put back in its original position after the test is completed.

[0024] Reference Figure 1 and Figure 3 The lifting unit 7 includes a slide rail 71 fixed to the upper end of gear 62. One side of the inner side of the slide rail 71 is screwed to lead screw 72, and the other side of the inner side of the slide rail 71 is fixed to guide post 73. The upper end of the slide rail 71 is fixed to motor 74. The rotating part of motor 74 is connected to lead screw 72. A sliding table 75 is movably mounted inside the slide rail 71. The sliding table 75 is screwed to lead screw 72. The sliding table 75 is movably connected to guide post 73. A linear push rod 76 is fixed to the sliding table 75. The movable end of the linear push rod 76 is fixed to concave frame 77.

[0025] When the height of the fastening module 8 needs to be adjusted, the motor 2 74 pulls the lead screw 1 72 to rotate, and the lead screw 1 72 drives the sliding table 75 to move vertically, thereby adjusting the height of the fastening module 8 to ensure that the manhole cover can be transferred. When the manhole cover fastened by the fastening module 8 needs to be placed on the positioning unit 5, the linear push rod 2 76 drives the manhole cover on the fastening module 8 to move directly above the positioning unit 5. When it moves to the designated position, the manhole cover can be lowered onto the positioning unit 5 to perform fastening and positioning.

[0026] Reference Figures 4-8 The fastening module 8 includes an assembly base 81, which is fixedly connected to a concave frame 77. An assembly platform 82 is installed at the bottom of the assembly base 81. A pair of movable platforms 810 are fixedly connected to the lower wall of the assembly platform 82. A movable seat 812 is movably installed on the movable platform 810. A fastening platform 811 for fastening the manhole cover is fixedly connected to the bottom of the movable seat 812. A second movable block 89 is screwed onto the side wall of the movable platform 810. A channel 87 is reserved at the top of the second movable block 89. A transmission port 88 is reserved at the bottom of the second movable block 89. A pressure column 85 is fixedly connected to the side wall of the first movable block 84. The pressure column 85 is movably installed in the channel 87. A transmission column 86 is fixedly connected to the side wall of the movable seat 812. The transmission column 86 is movably installed in the transmission port 88.

[0027] When fastening the manhole cover, the linear push rod 3 83 moves, and the movable end of the linear push rod 3 83 pulls the first moving block 84 upward. During the upward movement of the first moving block 84, the pressure column 85 mounted on one side of it also moves upward. The pressure column 85 moves steadily in the trench 87, so that the second moving block 89 rotates around the side of the moving platform 810. During the rotation of the second moving block 89, the transmission port 88 reserved at its bottom can press the transmission column 86. The transmission column 86 moves under the pressure of the transmission port 88. At this time, the moving seat 812, with the cooperation of the transmission column 86, moves steadily towards the center along the slide 52 on the moving platform 810, so that the fastening platform 811 slowly approaches, achieving the purpose of pre-fastening the manhole cover. The user can accurately adjust the position of the fastening platform 811 according to the manhole cover of various specifications, so that the fastening module 8 can easily adapt to the manhole cover of various specifications, greatly reducing the limitations of the fastening module 8.

[0028] Reference Figure 6 , Figure 7 and Figure 9 To enhance the fastening effect of the fastening platform 811 on the manhole cover, an auxiliary component is installed. This component increases resistance to the manhole cover through contact with the cover, ensuring a secure fastening. The auxiliary component, located inside the fastening platform 811, adjusts the resistance during fastening by changing the state of its elastic sheet 815 in contact with the cover. The auxiliary component includes a silicone platform 816, which is fixed inside the fastening platform 811. The two sides at the lower end of the fastening platform 811 are angled inwards. An elastic sheet 815 is fixed to the edge inside the fixed platform 811. A round opening is reserved on the elastic sheet 815. A silicone protrusion 817 is fixed to the wall of the silicone platform 816. The silicone platform 816 and the elastic sheet 815 fit together. The round openings reserved on the silicone protrusion 817 and the elastic sheet 815 correspond to each other. The elastic sheet 815 changes shape due to the compression of the manhole cover and comes into contact with the outer surface of the manhole cover. The silicone platform 816 enlarges the silicone protrusion 817 due to the compression of the elastic sheet 815.

[0029] During the fastening of the manhole cover by the fastening module 8, the elastic plate 815 installed inside the fastening platform 811 first contacts the wall of the manhole cover. When the elastic plate 815 is in contact with the manhole cover, the pressure exerted by the manhole cover on it causes the elastic plate 815 to change shape until it can be tightly attached to the wall of the manhole cover. The contact range between the elastic plate 815 and the manhole cover is increased. The large contact range can evenly distribute the fastening effect. During the change of shape, the elastic plate 815 applies pressure to the silicone platform 816 mounted on its back. After the elastic plate 815 is compressed, its shape changes, and then the silicone protrusions 817 initially evenly distributed on the silicone platform 816 gradually increase in size, further increasing the resistance between the elastic plate 815 and the manhole cover. This can prevent the manhole cover from falling off during the upward movement and ensure the safe transfer of the manhole cover.

[0030] Reference Figures 10-12 To further ensure a secure fastening and prevent it from falling off during the fastening process, a reinforcing member is installed. This member secures the top of the manhole cover, further reinforcing its stability. The top of the mounting base 81 is fixedly connected to a linear push rod 83, the movable end of which is fixedly connected to a movable block 84. A reinforcing member is installed at the bottom of the movable block 84. The reinforcing member, through the positional movement of its movable block 825 and the housing 823, achieves the initial... The purpose of cleaning and tightening is to reinforce the components, which include a connecting post 818. The connecting post 818 is fixed to the bottom of the first movable block 84. The bottom of the connecting post 818 is fixed to the assembly block 814. A connecting strip 819 is fixed between the assembly block 814 and the first movable block 84. Several interlocking blocks are installed on the connecting strip 819. A second lead screw 820 is screwed onto the assembly table 82. A rotating disk 822 is fixed to the second lead screw 820. Several interlocking joints of the connecting strip 819 are reserved on the rotating disk 822. When the rotating disk 822 and the connecting strip 819 are aligned during the upward movement of the 9-axis, the engagement block on the connecting strip 819 and the engagement port on the rotating disk 822 engage with each other. The lead screw 820 is threaded onto the movable table 821, and the threads on both sides of the lead screw 820 run in opposite directions. The bottom of the movable table 821 is screwed onto the rotating strip 824. The fastening plate 813 is fixedly connected to the assembly block 814, and the top of the fastening plate 813 is connected to the housing 823. A movable block 825 is movably installed in the middle, and a restraining block 826 is movably installed on the top of the housing 823. The restraining block 826 and the rotating bar 824 are screwed together. When the assembly block 814 starts to move upward, the movable block 825 compresses the air inside the housing 823. When the assembly block 814 moves upward until the biting block on the connecting bar 819 and the biting mouth on the rotating disk 822 are engaged with each other, the movable block 825 moves upward along the inside of the housing 823.

[0031] During the fastening action, the first movable block 84 moves upward under the continuous traction of the third linear push rod 83. The first movable block 84 is connected to the assembly block 814 via the connecting post 818, and then together they pull the assembly block 814 upward. When the assembly block 814 begins to move upward, it causes the housing 823 to move upward. However, at this moment, the position of the movable block 825 remains relatively stationary. During the upward movement of the housing 823, because the movable block 825 and the housing 82... The cavity inside 3 generates relative movement, and the movable block 825 compresses the air inside the housing 823. The compressed air is quickly blown out from the fastening disc 813 connected to the housing 823 and blown onto the outer wall of the manhole cover, quickly removing the particles accumulated on the outer wall of the manhole cover to prevent the particles from affecting the subsequent fastening of the manhole cover. This ensures the stability and reliable fastening of the manhole cover by the assembly block 814. As the assembly block 814 continues to move upward, it allows the interlocking blocks on the connecting strip 819 to engage. When the meshing jaws on the rotating disk 822 are engaged, the rotating disk 822 rotates with the assistance of the meshing block, transmitting the rotational force to the lead screw 820 connected to it. The lead screw 820 rotates under the traction of the rotating disk 822. Because the threads on both sides of the lead screw 820 run in opposite directions, the movable table 821 mounted on the lead screw 820 moves to both sides with the assistance of the threads. The movable table 821 is connected to the constraint block 826 via the rotating bar 824. During the movement of the movable platform 821 to both sides, the rotating bar 824 will rotate and move horizontally, which in turn pulls the restraint block 826 to move. The movement of the restraint block 826 causes the movable block 825 to move upward along the inside of the box 823. The movement of the movable block 825 causes the air pressure intensity inside the box 823 to change, which in turn causes the fastening plate 813 to tighten the manhole cover, firmly fastening the manhole cover to the assembly block 814, achieving a stable fastening of the manhole cover and ensuring stability during the transfer.

[0032] The foregoing has shown and described 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 to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A fitting device for a manhole cover pressure testing machine, comprising a bracket, characterized in that, A linear push rod is installed at the upper end of the bracket, and a pressure table is installed at the movable end of the linear push rod. A pressure sensor is installed at the lower end of the bracket, and a positioning unit is installed at the upper end of the pressure sensor. A steering unit is installed on one side of the bracket, a lifting unit is installed on the steering unit, and a fastening module is installed on the lifting unit.

2. The matching device for a manhole cover pressure testing machine according to claim 1, characterized in that: The positioning unit includes a support platform fixed to the pressure sensor. Two pairs of slides are reserved at equal intervals on the support platform. A guide rod is fixed in the slide, and a slide seat is movably installed on the guide rod. The slide seat is movably connected to the slide. A spiral beryllium copper wire is clamped to the outside of the guide rod. Both sides of the spiral beryllium copper wire are fixed to one side of the slide and the slide seat. A positioning block is fixed to the upper end of the slide seat, and an inclined plate is fixed to the upper end of the positioning block.

3. The matching device for a manhole cover pressure testing machine according to claim 1, characterized in that: The steering unit includes a base plate fixed to the side of the bracket, a gear one screwed onto the base plate, a support plate fixed to the side of the base plate, a motor one fixed to the upper end of the support plate, a gear two fixed to the rotating part of the motor one, and gear two meshing with gear one.

4. The matching device for a manhole cover pressure testing machine according to claim 3, characterized in that: The lifting unit includes a slide rail fixed to the upper end of gear one, a lead screw one screwed to one side of the inner side of the slide rail, a guide column fixed to the other side of the inner side of the slide rail, a motor two fixed to the upper end of the slide rail, the rotating part of motor two connected to lead screw one, a sliding table movably mounted inside the slide rail, the sliding table connected to lead screw one screw, the sliding table movably connected to guide column, a linear push rod two fixed to the sliding table, and a concave frame fixed to the movable end of linear push rod two.

5. The matching device for a manhole cover pressure testing machine according to claim 1, characterized in that: The fastening module includes an assembly base, an assembly platform at the bottom of the assembly base, a pair of movable platforms fixed to the lower wall of the assembly platform, a movable seat movably mounted on the movable platform, a fastening platform for fastening the manhole cover fixed to the bottom of the movable seat, a linear push rod three fixed to the top of the assembly base, a movable block one fixed to the movable end of the linear push rod three, a reinforcing member at the bottom of the movable block one, the reinforcing member achieves the purpose of cleaning the manhole cover before fastening it by adjusting the position of the movable block and the box body, and an auxiliary component is installed inside the fastening platform, the auxiliary component adjusts the resistance during fastening by changing the state of the elastic plate on it and the contact with the manhole cover. The auxiliary component includes a silicone platform, which is fixed inside the fastening platform. The two sides of the lower end of the fastening platform are inclined inward. An elastic sheet is fixed to the inner edge of the fastening platform. A round opening is reserved on the elastic sheet. A silicone protrusion is fixed to the wall of the silicone platform. The silicone platform and the elastic sheet fit together. The round openings on the silicone protrusion and the elastic sheet correspond to each other. The elastic sheet changes shape due to the compression of the manhole cover and comes into contact with the outer surface of the manhole cover. The silicone protrusion is enlarged due to the compression of the elastic sheet. The reinforcement includes a connecting post, which is fixed to the bottom of the first movable block. An assembly block is fixed to the bottom of the connecting post. A connecting strip is fixed between the assembly block and the movable block. Several engagement blocks are installed on the connecting strip. A second lead screw is screwed onto the assembly table. A rotating disk is fixed to the second lead screw. Several engagement slots are pre-drilled on the rotating disk. When the connecting strip moves upwards, and the rotating disk and the connecting strip are aligned, the engagement blocks on the connecting strip and the engagement slots on the rotating disk engage with each other. A movable table is screwed onto the second lead screw. The two sides of the second lead screw... The threads of the assembly block run in opposite directions. The bottom of the movable table is connected to the rotating bar. The fastening plate is fixed in the assembly block. The top of the fastening plate is connected to the housing. The movable block is movably installed in the housing. The constraint block is movably installed on the top of the housing. The constraint block and the rotating bar are screwed together. When the assembly block starts to move upward, the movable block compresses the air inside the housing. When the assembly block moves upward until the engagement block on the connecting bar and the engagement port on the rotating plate engage with each other, the movable block moves upward along the inside of the housing.

6. The matching device for a manhole cover pressure testing machine according to claim 5, characterized in that: The second variable block is screwed onto the side wall of the variable platform. The top of the second variable block has a groove, and the bottom of the second variable block has a transmission port.

7. The matching device for a manhole cover pressure testing machine according to claim 6, characterized in that: A pressure column is fixedly connected to the side wall of the first variable block. The pressure column can be movably installed in the trench. A transmission column is fixedly connected to the side wall of the variable seat. The transmission column can be movably installed in the transmission port.

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