Walking type jack

Abstract

The utility model relates to the field of jacks, in particular to a walking type jack. Comprising a base; the base is detachably connected with the temporary bracket; the number of the supporting blocks is two, the supporting blocks are oppositely arranged on the base, and the supporting blocks are fixedly connected with the upper surface of the base; the two rails are fixedly connected with the supporting block; a sliding block; the sliding blocks are oppositely arranged on the two rails, and the sliding blocks are in sliding connection with the rails; a first hydraulic cylinder; the bottom of the lifting table is fixedly connected with the free end of the first hydraulic cylinder; the reciprocating mechanism is used for pushing the lifting table to reciprocate along the track; the reciprocating mechanism is arranged on the side face of the base, and the free end of the reciprocating mechanism is arranged between the two rails and is parallel to the two rails. And the air blowing tower is arranged on the base close to the reciprocating mechanism and used for blowing air towards the lifting table when the reciprocating mechanism pushes the lifting table to move towards the fixed end of the reciprocating mechanism. The problem that a walking type jack is poor in heat dissipation is solved.

Description

Technical Field

[0001] The utility model relates to the field of jacks, and particularly relates to a walking jack. Background Art

[0002] A walking jack is an efficient, stable and easy-to-operate bridge construction equipment. It realizes the precise displacement of the bridge beam body through four steps of jacking, translation, lowering and return stroke that simulate the walking action. This equipment is widely used in the construction of overpass bridges due to its high safety, maintainability, convenience, high performance and waterproof design. It can improve the construction efficiency and the accuracy of bridge erection without affecting the existing traffic. During the bridge construction process, multiple walking jacks can operate synchronously and are precisely coordinated and uniformly controlled by a computer control system. This system can monitor the working state of each jack in real time, including the jacking, translation and lowering actions, to ensure that all jacks run synchronously according to the predetermined program, thereby realizing the smooth and precise jacking of the beam body. Through precise algorithms and feedback mechanisms, the computer control system can automatically adjust the actions of each jack to compensate for the asynchronism caused by friction differences or other factors, ensuring the safety and efficiency of the entire construction process.

[0003] The utility model patent with the application number 202020115512.3 discloses a jack for walking jacking construction, which is characterized in that: it includes a sliding box, a horizontal pushing oil cylinder, a jacking oil cylinder and a deviation correction oil cylinder; the sliding box includes a sliding groove and a sliding block in sliding fit, a reaction frame is arranged at one end of the sliding groove, and a guiding frame which is in cooperation with the sliding groove and is of a frame type is arranged on the sliding block; the horizontal pushing oil cylinder is installed on the reaction frame, and the horizontal pushing force acts on the guiding frame; the jacking oil cylinder is installed in the guiding frame on the sliding block, a top plate which is ball-jointed with the jacking oil cylinder is arranged on the jacking oil cylinder, and a guiding hole for limiting the rotation of the top plate is arranged on the guiding frame; the deviation correction oil cylinder is installed on the guiding frame, and the deviation correction force acts on the jacking oil cylinder. In this utility model, through the setting of the sliding box, the integration of the horizontal pushing oil cylinder, the jacking oil cylinder and the deviation correction oil cylinder can be realized, and it has the function of three-way synchronous jacking.

[0004] The above-mentioned technology realizes three-way movement and can correct deviation during lifting. The walking jack is usually used for pushing steel box girders during bridge construction. A steel box girder refers to a box-shaped girder with a rigid structure, which is an important part of the bridge structure, especially in long-span bridges. Through precise control, the walking jack can achieve the stable lifting and pushing of the steel box girder, ensuring the accuracy and safety of bridge construction. When pushing the steel box girder, multiple walking jacks are installed on the temporary support, and then the computer control system uniformly controls the jacks to push and move. When the jacks work for a long time at high frequency, combined with hot weather, the jacks may overheat, leading to problems such as a decline in equipment performance, accelerated component wear, and structural deformation. Therefore, a technology is needed to dissipate heat from the walking jacks on the temporary support. Summary of the Invention

[0005] The present invention provides a walking jack, which can solve the problem of poor heat dissipation of the walking jack.

[0006] To solve the above technical problems, the present application provides the following technical solutions:

[0007] A walking jack, comprising:

[0008] A base; the base is detachably connected to the temporary support;

[0009] Support blocks: There are two support blocks, which are oppositely arranged on the base, and the support blocks are fixedly connected to the upper surface of the base;

[0010] Tracks: There are two tracks, which are fixedly connected to the support blocks;

[0011] Sliding blocks; the sliding blocks are oppositely arranged on the two tracks, and the sliding blocks are slidably connected to the tracks;

[0012] First hydraulic cylinders: A first hydraulic cylinder is arranged on the upper surface of each sliding block, and the fixed end of the first hydraulic cylinder is fixed on the upper surface of the sliding block;

[0013] A lifting platform: The bottom of the lifting platform is fixedly connected to the free end of the first hydraulic cylinder;

[0014] A reciprocating mechanism: It is used to push the lifting platform to reciprocate along the track; the reciprocating mechanism is arranged on the side of the base, and the free end of the reciprocating mechanism is arranged between the two tracks and is parallel to the two tracks;

[0015] A blowing tower: It is arranged on the base near the reciprocating mechanism and is used to blow air towards the lifting platform when the reciprocating mechanism pushes the lifting platform towards the fixed end of the reciprocating mechanism.

[0016] The basic principle and beneficial effects of this scheme are as follows: the reciprocating mechanism drags the lifting platform back and forth on a horizontal path, and when it returns to the initial position, all the first hydraulic cylinders are lifted to the bottom of the steel box girder and abut against it, and then are lifted up again synchronously so that the steel box girder is suspended in the air, and then the reciprocating mechanism is driven to move in a straight line toward the far end. Driven by the reciprocating mechanism, the steel box girder is synchronously translated toward the target area for a distance, and then the first hydraulic cylinder descends, and the steel box girder is supported by a temporary support, the lifting platform descends to the lower limit position, and then is dragged to its original position in the direction of the reciprocating mechanism. During this process, the blowing tower blows air in the direction of the lifting platform, which can blow and cool the surface of the lifting platform and the exposed reciprocating mechanism, the first hydraulic cylinder, etc.; the reciprocating lifting process completes the movement of the steel box girder. In addition to cooling by blowing air, the blowing tower can also blow off impurities that have fallen from the steel box girder onto the top of the lifting platform when the lifting platform leaves from under the steel box girder, to prevent the hard impurities from being compressed and damaging the surface of the lifting platform when it is lifted again. Hard impurities are stuck between the lifting platform and the steel box girder, which may cause dislocation when lifting the steel box girder, causing deviation in the force applied to the jack and damage to the jack. It may also cause the position of the steel box girder to shift and fail to achieve the predetermined travel target. In severe cases, it may cause safety hazards during the lifting process. The blowing process can cool the equipment, remove impurities, and reduce safety hazards.

[0017] Furthermore, a plurality of mounting holes are provided on the base, and the base is connected to the temporary bracket by bolts through the mounting holes.

[0018] Beneficial effect: It is convenient for the repeated use and installation of the jack.

[0019] Furthermore, the cylinder is fixed on the base, and a push block is slidably connected inside the cylinder, and a push rod is fixedly connected to the push block. The other end of the push rod extends out of the cylinder and is slidably connected to the cylinder. The push rod extending out of the cylinder is parallel to the free end of the reciprocating mechanism; and the free end of the reciprocating mechanism is respectively fixed to the bottom of the lifting platform and the push rod; the side of the cylinder away from the push rod is connected to the blowing tower.

[0020] Beneficial effect: The wind of the blowing tower comes from the reciprocating motion of the reciprocating mechanism, which drives the push rod to slide, so that the blowing tower generates wind force. This process is completed by the lifting of the jack and is carried out during the reset process, which will not affect the lifting process.

[0021] Furthermore, the blowing tower includes at least one air outlet inclined downward, and the height of the air outlet is higher than the lower limit position of the lifting platform lifted by the first hydraulic cylinder.

[0022] Beneficial effect: It is convenient to cool down the lifting platform and related equipment.

[0023] Further, the cylinder is divided into a first air chamber and a second air chamber with unequal diameters. The diameter of the first air chamber closer to the push rod is smaller than that of the second air chamber, and the push block cooperates with the first air chamber. It further includes a partition block which is arranged at the junction of the first air chamber and the second air chamber. The partition block is slidably connected to the second air chamber, and a spring is fixed between the inner wall of the second air chamber far from the first air chamber and the partition block. The blowing tower is provided with two air outlets, namely a first air outlet and a second air outlet. The first air outlet is vertically upward, and the second air outlet faces the direction of the lifting platform. The first air chamber is communicated with the first air outlet, and the second air chamber is communicated with the second air outlet.

[0024] Beneficial effects: During the reset process of the reciprocating mechanism, first, the push block slides in the first air chamber. Since the diameter is slightly smaller, the generated wind is relatively small. The wind generated during this process is blown upward by the first air outlet, which can blow the impurities at the bottom of the steel box girder above it, causing them to fall. When the reciprocating mechanism continues to reset, the push block abuts against the partition block, pushing the partition block to slide, squeezing the second air chamber, and generating a relatively large wind to blow and cool in the direction of the lifting platform and remove impurities.

[0025] Further, there are two lifting platforms, and a slag collecting groove is formed between the two lifting platforms.

[0026] Beneficial effects: To prevent the limited blowing distance of some impurities, a slag collecting groove is set to collect garbage.

[0027] Further, the reciprocating mechanism is a ball screw structure, including a motor, a screw rod, and a ball seat. The motor is installed on one side of the base, and the output shaft of the motor is coaxial with the symmetry axis between the two rails. The screw rod is coaxially fixed with the output shaft and is parallel to the rails. The ball seat is slidably connected to the screw rod, and the upper part of the ball seat is fixedly connected to the lower part of the lifting platform. Description of the Drawings

[0028] Figure 1 It is a three-dimensional schematic diagram of an embodiment of a walking jack;

[0029] Figure 2 It is a front view of an embodiment of a walking jack;

[0030] Figure 3 It is a top view of an embodiment of a walking jack;

[0031] Figure 4 It is Figure 3 The cross-sectional view taken along A - A in Detailed Description of the Specific Embodiment

[0032] The following is further detailed through specific embodiments:

[0033] The markings in the attached drawings of the specification include: base 1, mounting holes 11, support blocks 2, tracks 3, sliding blocks 4, first hydraulic cylinders 5, lifting platforms 6, slag collection troughs 61, blowing towers 7, first air outlets 71, second air outlets 72, motors 8, lead screws 81, ball seats 82, push rods 83, push blocks 84, cylinders 9, first air chambers 91, and second air chambers 92.

[0034] Example 1 is as shown in the attached Figures 1-4 drawing.

[0035] A walking jack includes:

[0036] Base 1; the base 1 is detachably connected to the temporary support; a number of mounting holes 11 are provided on the base 1, and the base 1 is bolted to the temporary support through the mounting holes 11. There are 4 evenly spaced mounting holes 11 on both the front and rear sides of the base 1.

[0037] Support blocks 2: There are two support blocks 2, which are oppositely arranged on the base 1, and the support blocks 2 are fixedly connected to the upper surface of the base 1; the support blocks 2 are vertically arranged for subsequent installation of the tracks 3.

[0038] Tracks 3: There are two tracks 3, which are fixedly connected to the support blocks 2; threaded connection is adopted.

[0039] Sliding blocks 4; the sliding blocks 4 are oppositely arranged on the two tracks 3, and the sliding blocks 4 are slidably connected to the tracks 3; the sliding blocks 4 cooperate with the tracks 3 to facilitate sliding.

[0040] First hydraulic cylinders 5: One first hydraulic cylinder 5 is provided on the upper surface of each sliding block 4, and the fixed end of the first hydraulic cylinder 5 is fixed on the upper surface of the sliding block 4; there are 4 first hydraulic cylinders 5 in this solution, and two are provided on each track 3. The number of sliding blocks 4 matches it.

[0041] Lifting platforms 6: The bottom of the lifting platforms 6 is fixedly connected to the free ends of the first hydraulic cylinders 5; there are two lifting platforms 6, and a slag collection trough 61 is provided between the two lifting platforms 6. The two lifting platforms 6 are fixedly connected. They form a whole for movement.

[0042] Reciprocating mechanism: It is used to push the lifting platform 6 to reciprocate along the track 3; the reciprocating mechanism is arranged on the side of the base 1, and the free end of the reciprocating mechanism is arranged between the two tracks 3 and is parallel to the two tracks 3; the reciprocating mechanism is a ball screw 81 structure, including a motor 8, a lead screw 81, and a ball seat 82. The motor 8 is installed on one side of the base 1, and the output shaft of the motor 8 is coaxial with the axis of symmetry between the two tracks 3. The lead screw 81 is coaxially fixed with the output shaft and is parallel to the track 3; the ball seat 82 is slidably connected to the lead screw 81, and the upper part of the ball seat 82 is fixedly connected to the lower part of the lifting platform 6.

[0043] Blowing tower 7: It is arranged on the base 1 close to the reciprocating mechanism and is used to blow air towards the lifting platform 6 when the reciprocating mechanism pushes the lifting platform 6 towards the fixed end of the reciprocating mechanism.

[0044] It further includes a cylinder 9. The cylinder 9 is fixed on the base 1. A push block 84 is slidably connected inside the cylinder 9. The push block 84 is fixedly connected to a push rod 83. The other end of the push rod 83 extends out of the cylinder 9 and is slidably connected to the cylinder 9. The push rod 83 extending out of the cylinder 9 is parallel to the lead screw 81. And the ball seat 82 is fixedly connected to the bottom of the lifting platform 6 and the push rod 83 respectively. One side of the cylinder 9 away from the push rod 83 is communicated with the blowing tower 7. The cylinder 9 is divided into a first air chamber 91 and a second air chamber 92 with unequal diameters. Among them, the diameter of the first air chamber 91 close to the push rod 83 is smaller than that of the second air chamber 92. The push block 84 cooperates with the first air chamber 91. It further includes a partition block. The partition block is arranged at the junction of the first air chamber 91 and the second air chamber 92. The partition block is slidably connected to the second air chamber 92. A spring is fixed between the inner wall of the second air chamber 92 away from the first air chamber 91 and the partition block. The blowing tower 7 is provided with two air outlets, namely a first air outlet 71 and a second air outlet 72. Among them, the first air outlet 71 is vertically upward, and the second air outlet 72 is directed towards the lifting platform 6. The first air chamber 91 is communicated with the first air outlet 71, and the second air chamber 92 is communicated with the second air outlet 72. The second air outlet 72 is inclined downward, and the height of the second air outlet 72 is higher than the lower limit position where the lifting platform 6 is lifted by the first hydraulic cylinder 5.

[0045] The reciprocating mechanism drags the lifting platform 6 to move back and forth on a horizontal path. When it returns to the initial position, all the first hydraulic cylinders 5 are lifted to the bottom of the steel box girder and abutted against it, and then lifted synchronously again so that the steel box girder is suspended. Then the reciprocating mechanism is driven to move linearly towards the far end. Driven by the reciprocating mechanism, the steel box girder is synchronously translated a certain distance towards the target area. Then the first hydraulic cylinder 5 descends, the steel box girder is supported by the temporary support, the lifting platform 6 descends to the lower limit position, and then it is dragged towards the reciprocating mechanism to the original position. During this process, the blowing tower 7 blows air towards the lifting platform 6, which can blow and cool the surface of the lifting platform 6 and the exposed reciprocating mechanism, the first hydraulic cylinder 5, etc.; during the reciprocating lifting process, the moving of the steel box girder is completed. In addition to blowing and cooling, the blowing tower 7 can also blow off the impurities that fall on the upper part of the lifting platform 6 from the steel box girder when the lifting platform 6 leaves below the steel box girder, preventing the hard impurities from being pressed to damage the surface of the lifting platform 6 when lifting again, and the hard impurities getting stuck between the lifting platform 6 and the steel box girder, which may also cause misalignment when lifting the steel box girder, resulting in deviation of the force on the jack, damage to the jack, and may also cause the position deviation of the steel box girder, unable to reach the predetermined travel target, and seriously may cause potential safety hazards during the lifting process. Through the blowing process, the equipment can be cooled, and at the same time, impurities can be removed to reduce potential safety hazards.

[0046] The above are only embodiments of the present utility model. The utility model is not limited to the fields involved in this embodiment. Common knowledge such as specific structures and characteristics known in the art are not described in detail herein. Those of ordinary skill in the art know all the common general technical knowledge in the technical field to which the utility model pertains before the filing date or the priority date, can learn all the existing technologies in this field, and have the ability to apply the conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given in this application and in combination with their own abilities, perfect and implement this solution. Some typical well-known structures or well-known methods should not become obstacles for those of ordinary skill in the art to implement this application. It should be noted that for those skilled in the art, without departing from the structure of the present utility model, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A walking jack, characterized in that, Comprising: A base; the base is detachably connected to the temporary support. Support blocks: There are two support blocks, which are oppositely arranged on the base, and the support blocks are fixedly connected to the upper surface of the base. Tracks: There are two tracks, which are fixedly connected to the support blocks. Sliding blocks; the sliding blocks are oppositely arranged on the two tracks, and the sliding blocks are slidably connected to the tracks. First hydraulic cylinders: A first hydraulic cylinder is arranged on the upper surface of each sliding block, and the fixed end of the first hydraulic cylinder is fixed on the upper surface of the sliding block. A lifting platform: The bottom of the lifting platform is fixedly connected to the free end of the first hydraulic cylinder. A reciprocating mechanism: used to push the lifting platform to reciprocate along the track; the reciprocating mechanism is arranged on the side of the base, the free end of the reciprocating mechanism is arranged between the two tracks and is parallel to the two tracks. A blowing tower: arranged on the base near the reciprocating mechanism, and used to blow air towards the lifting platform when the reciprocating mechanism pushes the lifting platform towards the fixed end of the reciprocating mechanism.

2. The walking jack according to claim 1, wherein: A plurality of mounting holes are formed in the base, and the base is bolted to the temporary support through the mounting holes.

3. The walking jack according to claim 1, wherein: It further includes a cylinder, the cylinder is fixed on the base, a push block is slidably connected in the cylinder, the push block is fixedly connected to a push rod, the other end of the push rod extends out of the cylinder and is slidably connected to the cylinder, the push rod extending out of the cylinder is parallel to the free end of the reciprocating mechanism; and the free end of the reciprocating mechanism is respectively fixed to the bottom of the lifting platform and the push rod; one side of the cylinder away from the push rod is communicated with the blowing tower.

4. The walking jack according to claim 3, characterized in that: The blowing tower includes at least one downwardly inclined air outlet, and the height of the air outlet is higher than the lower limit position where the lifting platform is lifted by the first hydraulic cylinder.

5. The walking jack according to claim 4, characterized in that: The cylinder is divided into a first air chamber and a second air chamber with different diameters. The diameter of the first air chamber near the push rod is smaller than that of the second air chamber, and the push block cooperates with the first air chamber; it further includes a partition block, the partition block is arranged at the junction of the first air chamber and the second air chamber, the partition block is slidably connected to the second air chamber, and a spring is fixed between the inner wall of the second air chamber away from the first air chamber and the partition block. The blowing tower is provided with two air outlets, namely a first air outlet and a second air outlet. The first air outlet is vertically upward, and the second air outlet faces the direction of the lifting platform; the first air chamber is communicated with the first air outlet, and the second air chamber is communicated with the second air outlet.

6. The walking jack according to claim 1, wherein: There are two lifting platforms, and a slag collection groove is formed between the two lifting platforms.

7. A walking jack according to claim 1, characterized in that: The reciprocating mechanism is a ball screw structure, including a motor, a screw rod and a ball seat. The motor is installed on one side of the base, the output shaft of the motor is coaxial with the axis of symmetry between the two tracks, the screw rod is coaxially fixed with the output shaft and is parallel to the tracks; the ball seat is slidably connected to the screw rod, and the upper part of the ball seat is fixedly connected to the lower part of the lifting platform.

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