A city road leveling test device

Abstract

This invention relates to a leveling device for urban roads, specifically in the field of road leveling. It includes a supporting pedestal and an adjustable triangular bracket mounted on the underside of the supporting pedestal. A self-adjusting testing device is installed on the upper side of the supporting pedestal, adaptively adjusting according to the inclination angle of the road surface. The self-adjusting testing device includes a convex base fixedly mounted on the upper side of the supporting pedestal. A conical middle seat is ball-hinged onto the convex base via a ball-end rod. A connecting ring is detachably mounted on the upper side of the conical middle seat, and a square support plate is fixedly mounted on the upper side of the connecting ring. A level instrument is fixedly mounted on the square support plate. This invention allows for automatic angle adjustment of the level instrument according to the inclination angle during leveling tests on slopes or uneven road sections, quickly leveling the instrument to a horizontal position. Furthermore, the accuracy of the automatic adjustment can be controlled according to actual needs, facilitating subsequent leveling tests for testing personnel.

Description

Technical Field

[0001] This application relates to the technical field of road leveling testing, and in particular to a device for testing urban road leveling. Background Technology

[0002] Modern urban roads are a major component of urban master planning, influencing the organic activities of the entire city. Urban roads connect all areas of the city, serving as a means of transportation and pedestrian access, facilitating residents' lives, work, and cultural and recreational activities, and connecting with external roads to bear the burden of external transportation. Roads arose alongside human activities, promoting social progress and development; they are symbols of historical civilization and markers of scientific advancement. Road engineering refers to the entire process of planning, designing, constructing, maintaining, and managing roads, as well as the physical engineering work involved. To ensure the smooth progress of construction and the rational planning and design of urban roads, leveling instruments are used for surveying and planning during the road construction process.

[0003] For example, in the existing Chinese patent with publication number CN216813633U, an adjustable level bracket for road paving is disclosed, which includes a support base and a groove. The groove is embedded in the upper part of the support base. An adjustment and stabilization mechanism and a fixed installation mechanism are respectively provided on the upper part of the support base. The adjustment and stabilization mechanism includes: a support inclined rod, an adjusting inner rod, an insertion rod A, an inclined adjustment rod, a ball joint and an insertion rod B. The support inclined rod is rotatably provided below the support base, and the adjusting inner rod is movably installed below the support inclined rod. The inclined adjustment rod is provided outside the lower part of the adjusting inner rod through a rotating shaft. Using the aforementioned existing technology, when the device is used on a slope, two adjusting inner rods are embedded inside the supporting inclined rod and fixed with adjusting bolts. Then, the last adjusting inner rod is pulled out and fixed according to the balance angle of the level. After adjusting the height of the level, the inclined adjustment rod is rotated down. At this time, the angle of the ball joint is rotated, and then the insertion rod is fixed on the inclined surface with fastening bolts, improving the overall stability of the device. When fixing the level, the user manually presses the connecting rod, which causes the return spring set between the connecting rods to retract. After the return spring retracts, the user manually moves the hollow column to both sides of the level, causing the pressure plate to press the level. The connecting rod is released, and the connecting rod is spread open to both sides under the action of the return spring. The embedded protrusion on the side of the connecting rod is embedded in the embedded groove to fix the position of the pressure plate, thereby fixing the level.

[0004] However, the aforementioned existing technologies have the following technical defects:

[0005] When the aforementioned existing technology is used on slopes or uneven surfaces, workers need to manually insert the two adjusting inner rods into the support inclined rod and fix them with adjusting bolts. Then, the adjusting inner rods are fixed according to the balance angle of the level. After rotating the inclined adjustment rod down and adjusting the angle of the ball joint, the insertion rod is fixed on the inclined surface with the fastening bolts to ensure that the entire device can be placed stably. Finally, the workers manually fix the level. Although the above operation can achieve the effect of use on slopes or uneven surfaces, the operation is extremely cumbersome. Every time the position is changed and leveling tests are conducted on different road sections, manual adjustments must be made again one by one, which is extremely inconvenient and greatly increases the leveling test time.

[0006] Based on this, there is still room for improvement in order to overcome the aforementioned technical defects, even on the basis of an existing adjustable leveling instrument bracket for road paving. Summary of the Invention

[0007] In order to automatically adjust the level instrument according to the tilt angle when conducting leveling tests on slopes or uneven road sections, quickly adjust the level instrument to a horizontal state, and control the accuracy of automatic adjustment according to actual needs, so as to facilitate the testers to complete subsequent leveling tests, this application provides an urban road leveling test device.

[0008] This application provides a city road leveling test device, which adopts the following technical solution:

[0009] A city road leveling test device includes a supporting pedestal and an adjustable triangular bracket installed on the underside of the supporting pedestal. The supporting pedestal is provided with a self-adjusting test device that adaptively adjusts according to the inclination angle of the road surface.

[0010] The self-adjusting testing device includes a convex base fixedly installed on the upper side of a supporting circular platform. A conical middle layer seat is provided on the convex base via a ball-end rod. A spherical groove for mounting the ball-end rod is provided on the convex base. A connecting ring is detachably provided on the upper side of the conical middle layer seat. A square support plate is fixedly installed on the upper side of the connecting ring. A level is fixedly installed on the square support plate.

[0011] Preferably, the self-adjusting testing device further includes a combination insert plate, a replacement insert plate, a gravity ball, a locking mechanism, and a horizontal adjustment mechanism. Several of the combination insert plates and replacement insert plates are sequentially and equidistantly inserted into the conical middle layer seat. Several insert plate openings for inserting and installing the combination insert plates and replacement insert plates are equidistantly provided on the conical middle layer seat. The gravity ball is suspended at the center of the lower side of the square support plate by a connecting rope and is located inside the conical middle layer seat. The locking mechanism is located inside the convex base. Several of the horizontal adjustment mechanisms are sequentially and equidistantly installed on the supporting circular platform.

[0012] Preferably, the locking mechanism includes a double-ended protrusion, a concave abutment, an adjusting ring, and a driving screw. The double-ended protrusion is slidably mounted inside the convex base and located below the spherical end rod. The convex base has a limiting groove communicating with the spherical groove for the double-ended protrusion to be slidably mounted. The concave abutment is fixedly mounted on the upper side of the double-ended protrusion. The adjusting ring is rotatably mounted inside the convex base located below the double-ended protrusion. The convex base has a circular opening for the adjusting ring to be rotatably mounted. One end of the driving screw is fixedly mounted on the upper side of the adjusting ring, and the other end extends upward into the double-ended protrusion. The convex base has a connecting hole communicating with the limiting groove and the circular opening for the driving screw to be mounted. The double-ended protrusion has a threaded rotating hole adapted to the driving screw.

[0013] Preferably, the horizontal adjustment mechanism includes a hinged base, a drive tube, an internal component, and an air supply component. Several hinged bases are detachably and equidistantly mounted on a supporting circular platform via several square insert rods. Each hinged base has a through-hole adapted to the square insert rod. The supporting circular platform has several square slots equidistantly positioned to fit the square insert rods. Several drive tubes are ball-jointed to several hinged bases via several ball-end connecting rods. The drive tubes have elongated vents communicating with the inner cavity on their sidewalls. Each hinged base has an arc-shaped groove for hinged mounting of the ball-end connecting rods. The internal component is mounted on the drive tube, and several air supply components are equidistantly mounted on the supporting circular platform.

[0014] Preferably, the internal components include a push spring, an interrupting circular block, a rectangular side seat, a connecting circular rod, a closing bar, and a reaction actuator. The push spring is disposed in the inner cavity of the drive tube. The interrupting circular block is slidably disposed in the inner cavity of the drive tube and fixedly connected to the push spring. Several rectangular side seats are respectively fixedly installed on the outer wall of several combined insert plates. One end of the connecting circular rod is disposed on the rectangular side seat through a ball-side circular rod and a ball hinge. The other end extends into the inner cavity of the drive tube and is fixedly connected to the interrupting circular block. The rectangular side seat is provided with a ball end embedding groove for the ball-side circular rod to be hingedly installed. One end of the drive tube is provided with a through hole communicating with the inner cavity for the connecting circular rod to penetrate and extend into.

[0015] The sealing bar is slidably installed inside the side wall of the drive tube at the elongated vent. The drive tube has a bar slot that communicates with the elongated vent for the sealing bar to be installed. The reaction actuator is set on the sealing bar and the combined insert plate and is used to drive the sealing bar in conjunction with the gravity ball.

[0016] Preferably, the reaction actuator includes a push seat, a medium-sized round rod, a reaction plate, and a return spring. The push seat is fixedly installed on the outer wall of the closed bar. One end of the medium-sized round rod is hinged to the push seat via a ball-side round rod, and the other end extends into the conical middle layer seat through the combined insert plate. The push seat has a hinge groove for the ball-side round rod to be hinged. The combined insert plate has a through hole for the medium-sized round rod to extend through. The reaction plate is fixedly installed at the extended end of the medium-sized round rod. The return spring is sleeved on the medium-sized round rod between the reaction plate and the combined insert plate.

[0017] Preferably, the gas delivery assembly includes a rectangular gas delivery pipe, a one-way inlet valve, a one-way outlet valve, a one-way delivery valve, a delivery hose, a rubber block, and a push-pull rod. A plurality of the rectangular gas delivery pipes are equidistantly fixedly installed on a supporting circular platform. The one-way inlet valve and the one-way outlet valve are both connected to one end of the rectangular gas delivery pipe. The one-way delivery valve is connected to a drive pipe. Both ends of the delivery hose are connected to the one-way outlet valve and the one-way delivery valve, respectively. The rubber block is slidably disposed within the inner cavity of the rectangular gas delivery pipe. One end of the push-pull rod is fixedly installed on the rubber block, and the other end extends outward through the rectangular gas delivery pipe. One end of the rectangular gas delivery pipe has a pull-out hole communicating with the inner cavity for the push-pull rod to penetrate and extend through.

[0018] Preferably, the extended end of the push-pull rod is also fixedly equipped with an elliptical pull ring that facilitates driving by the tester.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] 1. By rotating the adjusting ring, the drive screw is driven to rotate. With the cooperation of the internal threaded hole of the double-ended protrusion, the double-ended protrusion can be driven to slide up or down. When sliding up, the concave abutment fixed on the upper side of the double-ended protrusion will enter the spherical groove and abut against the ball end rod, causing the ball end rod to be unable to rotate. Consequently, the conical middle seat and the level installed on the conical middle seat will also be unable to rotate, thus achieving the effect of locking the position of the level.

[0021] 2. By pulling and pushing the push-pull rod, the same volume of gas can be injected into the inner cavity of the drive tube, causing the interrupted circular block in the inner cavity of the drive tube to slide towards the push spring, so as to ensure that the push springs in multiple drive tubes are compressed to the same state, so as to automatically adjust the angle of the conical middle layer seat in conjunction with the reaction actuator, that is, to adaptively adjust the angle of the level.

[0022] 3. When the tripod is placed on a slope or uneven surface, the supporting truncated cone and the self-adjusting testing device mounted on it will tilt at a corresponding angle. At this time, rotating the adjusting ring causes the double-ended protrusions to slide down, and the concave abutment no longer contacts the ball-end rod, thus releasing the locking effect on the conical middle layer seat. Since the gravity ball always remains vertically downward, when the conical middle layer seat tilts, the gravity ball will contact one of the reaction plates, causing the closed bar in the corresponding drive tube to slide. When the elongated vent is opened, the gas injected into the drive tube is discharged through the elongated vent. At this time, under the action of the push spring, the connecting rod will be pushed to extend towards the conical middle seat, thereby driving the conical middle seat to rotate to achieve the purpose of adjusting the level's angle. When the conical middle seat is adjusted to a horizontal state, the gravity ball will no longer resist the reaction plate, and the elongated vent will close again under the action of the reset spring. Finally, the adjusting ring is rotated again to drive the concave abutment to resist the ball end rod to lock the adjusted level. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the entire application.

[0024] Figure 2 This is a schematic diagram of a self-adjusting testing device.

[0025] Figure 3 It is an exploded view of the connecting ring, square support plate, gravity ball, connecting rope and conical middle seat.

[0026] Figure 4 This is an exploded view of the combined insert plate, replacement insert plate, and conical middle layer seat.

[0027] Figure 5 This is a cross-sectional view of the locking mechanism.

[0028] Figure 6 This is an exploded view of the adjusting ring and the drive screw (viewed from bottom to top).

[0029] Figure 7 This is an exploded view of the square insert rod and hinged base in the horizontal adjustment mechanism.

[0030] Figure 8 This is a schematic diagram of some components of the horizontal adjustment mechanism.

[0031] Figure 9 It is a cross-sectional view of the internal components.

[0032] Figure 10 yes Figure 9 Enlarged view of region A in the middle.

[0033] Figure 11 This is a cross-sectional view of the reaction actuator.

[0034] Figure 12This is a schematic diagram of some components of the reaction actuator.

[0035] Figure 13 This is a cross-sectional view of the gas transmission assembly.

[0036] Figure 14 yes Figure 13 Enlarged view of region B in the middle.

[0037] Explanation of reference numerals in the attached drawings: 1. Supporting frustum; 11. Triangular bracket; 2. Self-adjusting testing device; 20. Convex base; 21. Spherical end rod; 22. Conical middle layer seat; 201. Spherical groove; 23. Connecting ring; 24. Square support plate; 25. Level; 26. Combined insert plate; 27. Replacement insert plate; 28. Gravity ball; 3. Locking mechanism; 4. Horizontal adjustment mechanism; 221. Insert plate opening; 29. ​​Connecting rope; 31. Double-ended protrusion; 32. Concave abutment; 33. Adjusting ring; 34. Drive screw; 202. Limiting groove; 203. Circular pivot; 204. Connecting hole; 311. Threaded pivot hole; 41. Hinge base; 42. Drive tube; 5. Internal components; 6. Gas supply components; 43. Square insert rod; 411. Square perforation ; 101, Square slot; 44, Ball end connecting rod; 421, Long vent; 412, Arc groove; 51, Push spring; 52, Interruption block; 53, Rectangular side seat; 54, Connecting rod; 55, Sealing bar; 7, Reaction actuator; 56, Ball side rod one; 531, Ball end embedding groove; 422, Through hole; 423, Bar slot; 71, Push seat; 72, Medium rod; 73, Reaction plate; 74, Return spring; 75, Ball side rod two; 711, Hinge groove; 261, Insertion hole; 61, Rectangular gas pipe; 62, One-way inlet valve; 63, One-way outlet valve; 64, One-way gas supply valve; 65, Gas supply hose; 66, Rubber block; 67, Push-pull rod; 611, Pull-out hole; 68, Oval pull ring. Detailed Implementation

[0038] The following is in conjunction with the appendix Figures 1-14 This application will be described in further detail.

[0039] This application discloses an urban road leveling test device, which can automatically adjust the level instrument according to the tilt angle when conducting leveling tests on slopes or uneven road sections, quickly adjusting the level instrument to a horizontal state. The accuracy of the automatic adjustment can be controlled according to actual needs to facilitate subsequent leveling tests by the testing personnel. This application provides an urban road leveling test device, including a supporting pedestal 1 and an adjustable triangular bracket 11 installed on the lower side of the supporting pedestal 1. The triangular bracket 11 can be adjusted in angle and length, and can be locked after adjustment to ensure stable placement on various complex road surfaces. Since this is known prior art, it will not be described in detail here, and the internal structure is not shown in the figures. A self-adjusting test device 2 is provided on the upper side of the supporting pedestal 1, which adaptively adjusts according to the tilt angle of the road surface.

[0040] After the tripod 11 is adjusted and stably placed on the road surface, the self-adjusting testing device 2 can automatically adjust its angle according to the inclination angle of the road surface, allowing testers to quickly and conveniently conduct leveling tests. It should be noted that only simple adjustments to the tripod 11 are needed to ensure it can stably support the frustum 1 on the road surface; precise adjustment is not required. The self-adjusting testing device 2 can automatically adjust itself according to the inclination angle of the road surface, reducing the time testers spend adjusting the equipment and shortening the required leveling test time.

[0041] Reference Figure 1 and Figure 2 As shown, the self-adjusting testing device 2 includes a convex base 20 fixedly installed on the upper side of the supporting truncated cone 1. A conical intermediate seat 22 is spherically hinged to the convex base 20 via a ball-end rod 21, and the ball-end rod 21 and the conical intermediate seat 22 are fixedly connected. A spherical groove 201 for mounting the ball-end rod 21 is provided on the convex base 20. A connecting ring 23 is detachably installed on the upper side of the conical intermediate seat 22, and a square support plate 24 is fixedly installed on the upper side of the connecting ring 23. A level 25 is fixedly installed on the square support plate 24. The level 25 is an instrument for establishing a horizontal line of sight and measuring the height difference between two points on the ground. The principle is to measure the height difference between ground points based on the principle of leveling. The main components include a telescope, a tubular level (or compensator), a vertical axis, a base, and leveling screws. It is an important testing instrument in road leveling tests. Since this is existing technology, it will not be described in detail here.

[0042] Through the above connection, when the ball-end rod 21 rotates under force, it will drive the conical middle seat 22 to rotate synchronously, that is, drive the level 25 to adjust its angle position.

[0043] Reference Figure 3 and Figure 4As shown, specifically, the self-adjusting test device 2 also includes a combination insert plate 26, a replacement insert plate 27, a gravity ball 28, a locking mechanism 3, and a horizontal adjustment mechanism 4. In this embodiment, preferably, three combination insert plates 26 and three replacement insert plates 27 are sequentially and equidistantly inserted into the conical middle layer base 22, and the combination insert plates 26 and replacement insert plates 27 are alternately installed on the conical middle layer base 22. The conical middle layer base 22 has six insertion slots 221 equidistantly provided for inserting and installing the combination insert plates 26 and replacement insert plates 27. It should be noted that the shapes of the combination insert plates 26 and replacement insert plates 27 are similar. Similarly, the combination insert plate 26 has corresponding mounting holes; the gravity ball 28 is suspended at the center of the lower side of the square support plate 24 by the connecting rope 29 and is located in the conical middle layer seat 22. The locking mechanism 3 is set in the convex base 20 and is used to lock the ball end rod 21, that is, to lock the position of the level instrument 25; in this embodiment, it is preferable that three sets of horizontal adjustment mechanisms 4 are installed at equal intervals on the supporting round platform 1, which can cooperate with the gravity ball 28 to automatically adjust the angle of the level instrument 25 according to the road surface inclination angle where the triangular bracket 11 is placed.

[0044] In practical use, when more precise horizontal angle adjustments are needed for the level instrument 25, three more sets of horizontal adjustment mechanisms 4 can be added. Simultaneously, three replacement inserts 27 can be replaced with three combination inserts 26 to correspond and cooperate with the newly added three sets of horizontal adjustment mechanisms 4. When the tripod 11 is placed on an inclined or uneven surface, the supporting pedestal 1 and the self-adjusting testing device 2 installed on the supporting pedestal 1 are both in an inclined state. At this time, the gravity ball 28 will always remain vertically downward under the action of gravity, thus causing a relative position change within the inclined conical intermediate seat 22 cavity. This can drive the horizontal adjustment mechanism 4 at a certain position. The horizontal adjustment mechanism 4 at this location will automatically adjust the angle of the conical intermediate seat 22 according to its inclination angle, thereby achieving angle adjustment of the level instrument 25.

[0045] Reference Figure 5 and Figure 6As shown, in order to quickly lock and release the position of the conical middle layer seat 22 for easy operation by testers, the locking mechanism 3 includes a double-ended protrusion 31, a concave abutment 32, an adjusting ring 33, and a drive screw 34. The double-ended protrusion 31 is slidably installed in the convex base 20 and located below the ball-end rod 21. The convex base 20 has a limiting groove 202 that communicates with the spherical groove 201 to limit the sliding installation of the double-ended protrusion 31. The concave abutment 32 is fixedly installed on the upper side of the double-ended protrusion 31. It should be noted that the concave arc angle on the concave abutment 32 is adapted to the arc angle of one end of the ball on the ball-end rod 21, and the concave arc surface on the concave abutment 32 is frosted. When the column 32 is driven to abut against the ball-end rod 21, the friction between the concave column 32 and the ball-end rod 21 will increase, thereby further improving the tightness and limiting of the ball-end rod 21. The adjusting ring 33 is rotatably set in the convex base 20 located below the double-ended protrusion 31. The convex base 20 has a circular opening 203 for the adjusting ring 33 to be rotatably installed. One end of the driving screw 34 is fixed on the upper side of the adjusting ring 33, and the other end extends upward into the double-ended protrusion 31. The convex base 20 has a groove 202 and a circular opening 203 that communicate with the limiting groove 202 and the circular opening 203 for the driving screw 34 to be installed in the connecting hole 204. The double-ended protrusion 31 has a threaded hole 311 that is adapted to the driving screw 34.

[0046] Rotating the adjusting ring 33 can simultaneously drive the drive screw 34. With the drive screw 34 cooperating with the threaded rotating hole 311 on the double-ended protrusion 31, the double-ended protrusion 31 can be driven to slide upward. Rotating the adjusting ring 33 can drive the double-ended protrusion 31 to slide downward. When the double-ended protrusion 31 is driven to slide upward, the double-ended protrusion 31 will gradually enter the spherical groove 201 and abut against the spherical end face of the spherical end rod 21, thereby achieving the effect of pressing and locking the spherical end rod 21, that is, locking the position of the conical middle layer seat 22. Rotating the adjusting ring 33 will drive the double-ended protrusion 31 to slide downward to release the abutment and locking effect on the spherical end rod 21.

[0047] Reference Figure 7 and Figure 8As shown, considering that the preparation and adjustment of equipment during road leveling tests typically takes a long time, and that readjustment is required after each relocation, the leveling mechanism 4 includes a hinged base 41, a drive tube 42, internal components 5, and an air supply component 6 to reduce the time spent by testers on adjusting and placing the equipment. In this embodiment, preferably, three hinged bases 41 are detachably and equidistantly mounted on the supporting frustum 1 via three square inserts 43. Each hinged base 41 has a through-hole 411 that matches the square insert 43. The supporting truncated cone 1 has six square slots 101 that are adapted to the square insert rod 43. After the square insert rod 43 is inserted into the square through hole 411, it enters the square slot 101 on the supporting truncated cone 1 to realize the detachable limiting installation of the hinge base 41. The three drive tubes 42 are respectively ball-jointed on the three hinge bases 41 through three ball-end connecting rods 44. The drive tube 42 has an elongated vent 421 that communicates with the inner cavity on its side wall. It should be noted that the elongated vent 421 is located in the upper half of the drive tube 42, that is, in a position away from the hinge base 41.

[0048] The hinged base 41 has an arc-shaped groove 412 for hinged installation of the ball end connecting rod 44. The internal component 5 is located on the drive tube 42 and is used to drive and adjust the conical middle layer seat 22. In this embodiment, three sets of gas supply components 6 are equidistantly installed on the supporting truncated cone 1 and are installed on the supporting truncated cone 1 in conjunction with three sets of horizontal adjustment mechanisms 4. The same amount of gas can be injected into the three drive tubes 42 through the three sets of gas supply components 6 respectively.

[0049] Reference Figures 8 to 10 The diagram shows the internal component 5 in this embodiment. Internal component 5 includes a push spring 51, an interrupting circular block 52, a rectangular side seat 53, a connecting rod 54, a closing bar 55, and a reaction actuator 7. The push spring 51 is located within the inner cavity of the drive tube 42. The interrupting circular block 52 is slidably located within the inner cavity of the drive tube 42 and fixedly connected to the push spring 51. In this embodiment, preferably, three rectangular side seats 53 are fixedly mounted on the outer walls of the three combined insert plates 26. One end of the connecting rod 54 is ball-hinged to the rectangular side seat 53 via a ball-side rod 56. The end extends into the inner cavity of the drive tube 42 and is fixedly connected to the interrupted circular block 52. The rectangular side seat 53 is provided with a ball end embedding groove 531 for the ball-side circular rod 56 to be hinged and installed. One end of the drive tube 42 is provided with a through hole 422 that communicates with the inner cavity for the connecting circular rod 54 to penetrate and extend into. When the push spring 51 is pushed and contracted, the connecting circular rod 54 can be pushed out towards the rectangular side seat 53 through the interrupted circular block 52, which forms a pushing force on the combined insert plate 26. Since the combined insert plate 26 is inserted into the conical middle layer seat 22, it can form a pushing force on the conical middle layer seat 22.

[0050] The sealing bar 55 is slidably installed inside the side wall of the drive tube 42 at the elongated vent 421. The drive tube 42 has a bar slot 423 that communicates with the elongated vent 421 for the installation of the sealing bar 55. The sealing bar 55 is adapted to the elongated vent 421 and can be sealed at the elongated vent 421, so that the inner cavity of the drive tube 42 can be in a sealed state. The reaction actuator 7 is set on the sealing bar 55 and the combined insert plate 26 and is used to cooperate with the gravity ball 28 to drive the sealing bar 55.

[0051] Reference Figure 11 and Figure 12 As shown, since it needs to cooperate with the gravity ball 28 to drive the sealing bar 55 to open the elongated vent 421, the reaction actuator 7 includes a push seat 71, a medium-sized round rod 72, a reaction plate 73, and a return spring 74. The push seat 71 is fixedly installed on the outer wall of the sealing bar 55. One end of the medium-sized round rod 72 is ball-hinged to the push seat 71 through a ball-side round rod 75, and the other end extends into the conical middle layer seat 22 through the combined insert plate 26. The push seat 71 has a hinge groove 711 for the ball-side round rod 75 to be hinged. The combined insert plate 26 has an insertion hole 261 for the medium-sized round rod 72 to extend through. The reaction plate 73 is fixedly installed on the medium-sized round rod 72. At the extended end of rod 72, a return spring 74 is sleeved on the medium-sized round rod 72 between the reaction plate 73 and the combined insert plate 26. The return spring 74 always has a driving force to push the reaction plate 73 toward the gravity ball 28. Since the other end of the medium-sized round rod 72 is hinged to the ball on the push seat 71, the stroke of the reaction plate 73 is limited. In the horizontal state without other external forces, the reaction plate 73 will not contact the gravity ball 28 even when it reaches its maximum shape under the action of the return spring 74. It is precisely because of the action of the return spring 74 that the sealing bar 55 is always closed and sealed at the elongated vent 421 without other external forces, so that the inner cavity of the drive tube 42 is in a sealed state.

[0052] When the triangular support 11 is placed on an inclined or uneven surface and tilts, the ball end rod 21 is locked by the locking mechanism 3, causing the conical middle layer seat 22, connecting ring 23, square support plate 24 and level 25 to tilt along with the triangular support 11. Although the connecting rope 29 is connected to the square support plate 24 and the connecting end tilts along with the square support plate 24, the gravity ball 28 remains in a vertically falling state under the action of gravity. This causes the gravity ball 28 to come into contact with a reaction plate 73 after the conical middle layer seat 22 tilts, driving the medium-sized round rod 72 to slide towards the closing bar 55, thus achieving the effect of pushing the closing bar 55 to slide open the long vent 421.

[0053] Reference Figure 13 and Figure 14As shown, in order to deliver the same amount of gas into multiple drive tubes 42 to drive the push spring 51 to be pushed and contracted to the same state, the gas delivery assembly 6 includes a rectangular gas delivery pipe 61, a one-way inlet valve 62, a one-way outlet valve 63, a one-way delivery valve 64, a gas delivery hose 65, a rubber block 66, and a push-pull rod 67; in this embodiment, preferably, three rectangular gas delivery pipes 61 are equidistantly fixedly installed on the supporting pedestal 1, and the one-way inlet valve 62 and the one-way outlet valve 63 are both connected. One-way air supply valve 64 is connected to drive pipe 42 at one end of rectangular air supply pipe 61. Air supply hose 65 is connected to one-way outlet valve 63 and one-way air supply valve 64 at both ends respectively. Rubber block 66 is slidably disposed in the inner cavity of rectangular air supply pipe 61. One end of push-pull rod 67 is fixedly installed on rubber block 66, and the other end extends outward through rectangular air supply pipe 61. One end of rectangular air supply pipe 61 is provided with pull hole 611 that communicates with the inner cavity for push-pull rod 67 to pass through and extend.

[0054] Since the internal volume of the rectangular gas supply pipe 61 is fixed, when the push-pull rod 67 is pulled, a certain amount of air can be drawn into the internal cavity of the rectangular gas supply pipe 61. When the push-pull rod 67 is pushed, a certain amount of gas can be delivered to the internal cavity of the drive pipe 42 through the one-way gas outlet valve 63, the gas delivery hose 65 and the one-way gas supply valve 64, so as to drive the interrupted circular block 52 to push the push spring 51, causing the push spring 51 to contract. Thus, half of the internal cavity of the drive pipe 42 is filled with the contracted push spring 51 and the other half is filled with injected gas. Since the elongated vent 421 is blocked by the sealing bar 55 at this time, the gas cannot be discharged and the contracted push spring 51 cannot rebound.

[0055] Continue to refer to Figure 14 As shown, an elliptical pull ring 68 is also fixedly installed at the extended end of the push-pull rod 67 to facilitate driving by the tester.

[0056] In practical use, the adjusted triangular bracket 11 is placed on the road surface to be tested. When placed on an inclined or uneven road surface, the triangular bracket 11 and the supporting pedestal 1 will be in an inclined state. Since the ball end rod 21 is locked by the locking mechanism 3 at this time, the conical middle layer seat 22, the connecting ring 23, the square support plate 24 and the level 25 will also tilt along with the supporting pedestal 1. Pull and push the elliptical pull ring 68 to inject a certain amount of gas into the inner cavity of the drive tube 42, causing the push spring 51 to be pushed and contracted. Half of the inner cavity of the drive tube 42 is the contracted push spring 51, and the other half is the injected gas. After all the drive tubes 42 have been filled with gas, rotate the adjusting ring 33 to release the contact lock on the ball end rod 21, i.e. the conical middle layer seat 22. Since the conical middle layer seat 22 and the square support plate 24 are in an inclined state at this time, the gravity ball 28 will contact a certain reaction plate 73, so that the medium-sized round rod 72 drives the sealing bar 55 to open the long vent 421, and the air in the inner cavity of the drive tube 42 will be discharged outward. The push spring 51 will rebound and push the connecting round rod 54 to extend outward, i.e. push the conical middle layer seat 22 to move in the opposite direction of the inclination. During the movement, the gravity ball 28 will gradually stop contacting the reaction plate 73, and the sealing bar 55 will gradually reset under the action of the reset spring 74 to block the long vent 421.

[0057] Because the bottoms of the other two drive tubes 42 are ball-jointed with the hinged base 41, the conical middle layer seat 22 can be pushed. Once the conical middle layer seat 22 is pushed and deviates, the gravity ball 28 will abut against the other reaction plate 73, causing the push spring 51 on the other side to rebound and push the connecting rod 54 outward to correct the position of the conical middle layer seat 22, ensuring that the conical middle layer seat 22 is adjusted to a horizontal position. After the conical middle layer seat 22 is adjusted to a horizontal position, the adjustment circle is rotated again. Ring 33 engages and locks the ball-end rod 21, thereby locking the position of the conical middle seat 22 after it has been adjusted to a horizontal state. This achieves the effect of adjusting and locking the level instrument 25 to a horizontal state. After adding more sets of horizontal adjustment mechanisms 4 and replacing the replacement insert 27 with the combination insert 26, the gravity ball 28 can engage with more reaction plates 73 at different angles, resulting in higher accuracy of angle adjustment and calibration of the conical middle seat 22, and thus higher horizontal accuracy of the level instrument 25.

[0058] The implementation principle of this embodiment is as follows:

[0059] (1) Stable placement: Place the adjusted triangular bracket 11 on the road surface to be tested. When placed on an inclined or uneven road surface, the triangular bracket 11 and the supporting round platform 1 will be in an inclined state. Since the ball end round rod 21 is locked by the locking mechanism 3 at this time, the conical middle layer seat 22, the connecting ring 23, the square support plate 24 and the level 25 will also tilt along with the supporting round platform 1. At this time, the whole device is placed on the road surface to be tested at an inclined position.

[0060] (2) Gas injection: Pulling and pushing the elliptical pull ring 68 injects a fixed amount of gas into the inner cavity of the drive tube 42, causing the push spring 51 to be pushed and contracted. Half of the inner cavity of the drive tube 42 is filled with the contracted push spring 51, and the other half is filled with the injected gas. After all the drive tubes 42 have been injected with gas, rotate the adjusting ring 33 to release the contact lock on the ball end rod 21, i.e., the conical middle layer seat 22.

[0061] (3) Angle adjustment: Since the conical middle layer seat 22 and the square support plate 24 are in an inclined state, the gravity ball 28 will contact a certain reaction plate 73, so that the medium round rod 72 drives the sealing bar 55 to open the long vent 421, and the air in the inner cavity of the drive tube 42 is discharged outward. The push spring 51 rebounds and pushes the connecting round rod 54 to extend outward, that is, pushes the conical middle layer seat 22 to move in the opposite direction of the inclination. During the movement, the gravity ball 28 will gradually stop contacting the reaction plate 73, and the sealing bar 55 will gradually reset under the action of the reset spring 74 to block the long vent 421.

[0062] (4) Deviation calibration: Once the conical middle layer seat 22 is pushed and a deviation occurs, the gravity ball 28 will contact the other reaction plate 73, causing the push spring 51 on the other side to rebound and push the connecting rod 54 to extend outward, so as to correct the position of the conical middle layer seat 22 and ensure that the conical middle layer seat 22 is adjusted to a horizontal position. After the conical middle layer seat 22 is adjusted to a horizontal position, the adjusting ring 33 is rotated again to contact and lock the ball end rod 21, that is, to lock the position of the conical middle layer seat 22 after adjusting to a horizontal state, thereby achieving the effect of adjusting the level 25 to a horizontal state and locking it.

[0063] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A leveling test device for urban roads, comprising a supporting pedestal (1) and an adjustable triangular bracket (11) installed on the underside of the supporting pedestal (1), characterized in that: The supporting pedestal (1) is provided with a self-adjusting test device (2) that adaptively adjusts according to the inclination angle of the road surface. The self-adjusting test device (2) includes a convex base (20) fixedly installed on the upper side of the supporting truncated cone (1). A conical middle layer seat (22) is provided on the convex base (20) by a ball-end rod (21). A spherical groove (201) for the ball-end rod (21) to be installed is provided on the convex base (20). A connecting ring (23) is detachably provided on the upper side of the conical middle layer seat (22). A square support plate (24) is fixedly installed on the upper side of the connecting ring (23). A level (25) is fixedly provided on the square support plate (24). The self-adjusting test device (2) also includes a combination insert plate (26), a replacement insert plate (27), a gravity ball (28), a locking mechanism (3), and a horizontal adjustment mechanism (4). Several of the combination insert plates (26) and replacement insert plates (27) are inserted at equal intervals on the conical middle layer seat (22). Several insert plate openings (221) for inserting and installing the combination insert plates (26) and replacement insert plates (27) are opened at equal intervals on the conical middle layer seat (22). The gravity ball (28) is suspended at the center of the lower side of the square support plate (24) by a connecting rope (29) and is located inside the conical middle layer seat (22). The locking mechanism (3) is set inside the convex base (20). Several of the horizontal adjustment mechanisms (4) are installed at equal intervals on the supporting truncated cone (1). The horizontal adjustment mechanism (4) includes a hinged base (41), a drive tube (42), an internal component (5), and an air supply component (6). Several hinged bases (41) are detachably and equidistantly mounted on a supporting truncated cone (1) via several square inserts (43). Each hinged base (41) has a through hole (411) adapted to the square insert (43). The supporting truncated cone (1) has several square slots (12) equidistantly spaced to fit the square inserts (43). 01), several drive tubes (42) are respectively ball-hinged on several hinge bases (41) by several ball-end connecting rods (44), and the drive tube (42) has an elongated vent (421) communicating with the inner cavity on its side wall. The hinge base (41) has an arc-shaped groove (412) for the ball-end connecting rod (44) to be hinged and installed. The internal component (5) is disposed on the drive tube (42), and several gas delivery components (6) are equidistantly installed on the supporting frustum (1). The internal component (5) includes a push spring (51), an interrupting circular block (52), a rectangular side seat (53), a connecting circular rod (54), a closing bar (55), and a reaction actuator (7). The push spring (51) is disposed in the inner cavity of the drive tube (42). The interrupting circular block (52) is slidably disposed in the inner cavity of the drive tube (42) and fixedly connected to the push spring (51). Several rectangular side seats (53) are respectively fixedly installed on several combined insert plates (2). 6) On the outer side wall, one end of the connecting round rod (54) is ball-hinged to the rectangular side seat (53) through the ball-side round rod (56), and the other end extends into the inner cavity of the drive tube (42) and is fixedly connected to the interrupted round block (52). The rectangular side seat (53) is provided with a ball end embedding groove (531) for the ball-side round rod (56) to be hinged and installed. One end of the drive tube (42) is provided with a through hole (422) that communicates with the inner cavity for the connecting round rod (54) to penetrate and extend into. The sealing bar (55) is slidably installed inside the side wall of the drive tube (42) at the elongated vent (421). The drive tube (42) has a bar slot (423) that communicates with the elongated vent (421) for installing the sealing bar (55). The reaction actuator (7) is disposed on the sealing bar (55) and the combined insert plate (26) and is used to cooperate with the gravity ball (28) to drive the sealing bar (55).

2. The urban road leveling test device according to claim 1, characterized in that: The locking mechanism (3) includes a double-ended protrusion (31), a concave abutment (32), an adjusting ring (33), and a drive screw (34). The double-ended protrusion (31) is slidably mounted in the convex base (20) and located below the spherical end rod (21). The convex base (20) has a limiting groove (202) that communicates with the spherical groove (201) for the double-ended protrusion (31) to be slidably mounted. The concave abutment (32) is fixedly mounted on the upper side of the double-ended protrusion (31). The adjusting ring (33) is rotatably mounted on the double-ended protrusion (31). The convex base (20) below the ring (33) has a circular opening (203) for the adjustment ring (33) to be rotatably installed. One end of the drive screw (34) is fixed on the upper side of the adjustment ring (33), and the other end extends upward into the double-ended protrusion (31). The convex base (20) has a connection with the limiting slide groove (202) and the circular opening (203) for the drive screw (34) to be installed in the connecting hole (204). The double-ended protrusion (31) has a threaded rotating hole (311) that is adapted to the drive screw (34).

3. The urban road leveling test device according to claim 1, characterized in that: The reaction actuator (7) includes a push seat (71), a medium-sized round rod (72), a reaction plate (73), and a return spring (74). The push seat (71) is fixedly installed on the outer wall of the closed bar (55). One end of the medium-sized round rod (72) is ball-hinged to the push seat (71) through a ball-side round rod (75), and the other end extends into the conical middle layer seat (22) through the combined insert plate (26). The push seat (71) has a hinge groove (711) for the ball-side round rod (75) to be hinged. The combined insert plate (26) has an insertion hole (261) for the medium-sized round rod (72) to extend through. The reaction plate (73) is fixedly installed at the extension end of the medium-sized round rod (72). The return spring (74) is sleeved on the medium-sized round rod (72) between the reaction plate (73) and the combined insert plate (26).

4. The urban road leveling test device according to claim 1, characterized in that: The gas delivery assembly (6) includes a rectangular gas delivery pipe (61), a one-way inlet valve (62), a one-way outlet valve (63), a one-way delivery valve (64), a gas delivery hose (65), a rubber block (66), and a push-pull rod (67). Several rectangular gas delivery pipes (61) are equidistantly fixedly installed on the supporting truncated cone (1). The one-way inlet valve (62) and the one-way outlet valve (63) are both connected to one end of the rectangular gas delivery pipe (61), and the one-way delivery valve (64) is connected to... On the drive tube (42), the two ends of the air supply hose (65) are connected to the one-way air outlet valve (63) and the one-way air supply valve (64) respectively. The rubber block (66) is slidably disposed in the inner cavity of the rectangular air supply pipe (61). One end of the push-pull rod (67) is fixedly installed on the rubber block (66), and the other end extends outward through the rectangular air supply pipe (61). One end of the rectangular air supply pipe (61) is provided with a pull hole (611) that communicates with the inner cavity for the push-pull rod (67) to penetrate and extend.

5. The urban road leveling test device according to claim 4, characterized in that: The extended end of the push-pull rod (67) is also fixedly equipped with an elliptical pull ring (68) for easy driving by the test personnel.

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