An acceleration locking type bridge buffer limiter

Abstract

The invention relates to an acceleration locking type bridge buffer limiter, which effectively solves the problem of delayed execution of locking action of the current buffer limiter; the technical solution comprises a cylinder and a column, the right end of the cylinder coaxially penetrates into the cylinder from the left end of the cylinder and can slide axially, and a first spring is installed between the right end of the cylinder and the left end of the cylinder; a locking unit is arranged between the cylinder and the cylinder, and the locking unit is composed of an inertia part, and when the acceleration of the relative movement between the cylinder and the cylinder is too large, the locking unit will be triggered to lock the cylinder and the cylinder; the invention uses acceleration as a variable to lock the damping part, can quickly respond to the execution of the locking action, timely limit the displacement of the violent impact, and effectively avoid the collision of the components when subjected to the violent impact.

Description

Technical Field

[0001] The invention relates to the field of bridge facilities, in particular to an acceleration locking type bridge buffer limiter. Background Art

[0002] Buffers are commonly used in bridges, buildings, machinery and other fields. For example, they are used between bridge beams and between piers and box beams. They provide margin and buffer energy dissipation for the movement and expansion of components under normal loads or temperature changes. At the same time, they are required to limit the position of components under severe impacts caused by earthquakes, strong winds, etc. to avoid collision or collapse of components. Current buffers generally use the viscous resistance of viscous liquid passing through the gap to dissipate energy. For example, application number CN02260101.5 The utility model patent of, the utility model patent with application number CN200720088947.8, and the invention patent with application number 201310011215.9 have improved the above patents, but they are all speed locking dampers in essence, that is, taking speed as a variable, when the relative motion speed reaches a set threshold, the locking takes effect, and the impact displacement and speed are limited; however, the essence of impact is the sudden increase of acceleration and force, and the speed is the result of the accumulation of acceleration over time. Therefore, taking speed as a variable will inevitably cause a lag in the execution of the locking action when impacted, and according to the relationship between acceleration, speed and displacement L=1 / 2vt=1 / 2at 2 It can be seen that when the final velocity, i.e., the velocity threshold, is determined, the smaller the acceleration, the longer the time and the greater the displacement. Therefore, if the velocity is used as a variable, the displacement before the locking action is executed is negatively correlated with the acceleration, that is, the displacement is uncertain depending on the impact type. Therefore, the untimely execution of the locking action will increase the risk of collision. Summary of the invention

[0003] In view of the above situation, the present invention provides an acceleration locking type bridge buffer limiter, which effectively solves the problem of delayed execution of the locking action of the current buffer limiter.

[0004] The technical solution is an acceleration locking bridge buffer stopper, comprising a cylinder and a column, wherein the right end of the cylinder coaxially penetrates into the cylinder from the left end of the cylinder and can slide axially, and a first spring is installed between the right end of the cylinder and the left end of the cylinder; and further comprising a first locking unit and a second locking unit:

[0005] The first locking unit includes a first tapered hole formed on the right end face of the cylinder, the large end of the first tapered hole faces rightward, a first inertia member is installed in the cylinder, the first inertia member can slide axially in the cylinder, the left end of the first inertia member is a cone adapted to the first tapered hole, the side wall of the first tapered hole is uniformly distributed with first through holes perpendicular to the axis, each first through hole is installed with a first clamping block, the inner end of the first clamping block extends into the first tapered hole, a plurality of first annular grooves are uniformly distributed axially on the side wall of the cylinder, the outer end of the first clamping block will be clamped into the first annular groove after being extended, and a second spring is installed on the first clamping block to reset it inward;

[0006] The second locking unit is coaxially sleeved on the second inertia member on the cylinder. The second inertia member is located on the left side of the cylinder. A second conical hole with the larger end facing right is opened on the right end surface of the second inertia member. The left end of the cylinder is a cone adapted to the second conical hole. A second through hole perpendicular to the axis is opened on the conical side wall of the left end of the cylinder. A second clamping block is installed in each second through hole. The outer end of the second clamping block contacts the inner wall of the second conical hole. A plurality of second annular grooves are evenly distributed axially on the outer wall of the cylinder. The inner end of the second clamping block will be stuck in the second annular groove after extending out. A third spring is installed on the second clamping block to reset it outward.

[0007] The first inertia member is of split type, including a first inertia block on the right and a conical head on the left, and a fourth spring is installed between the conical head and the first inertia block.

[0008] The second inertia member is of split type, including a second inertia block on the left and a conical sleeve on the right, and a fifth spring is installed between the conical sleeve and the second inertia block.

[0009] The left end of the column and the right end of the cylinder are both equipped with strong buffer parts.

[0010] A protective sleeve is fixed outside the cylinder, and the second locking unit is located inside the protective sleeve.

[0011] A first pull rope is connected between the first inertia block and the right end of the cylinder.

[0012] A second pull rope is connected between the second inertia block and the left end of the cylinder.

[0013] The outer end of the first clamping block and the inner end of the second clamping block are both triangular, the cross-sections of the first annular groove and the second annular groove are both triangular, and adjacent annular grooves are arranged without spacing.

[0014] The slope of the inclined surface at the tip of the clamping block satisfies the inclined surface self-locking condition.

[0015] The present invention uses acceleration as a variable to lock the damping member, which can quickly respond to the locking action, timely limit the displacement of the violent impact, and effectively avoid the collision of the components when they are subjected to the violent impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the present invention.

[0017] Figure 2 It is a front cross-sectional view of the present invention in a static state.

[0018] Figure 3 The front cross-sectional view of the present invention is when the cylindrical side is impacted and the first locking unit is locked.

[0019] Figure 4 The front cross-sectional view of the present invention is when the cylinder side is impacted and the second locking unit is locked.

[0020] Figure 5 for Figure 2 Enlarged view of position A in the middle.

[0021] Figure 6 for Figure 2 Enlarged view of position B in the middle.

[0022] Figure 7 for Figure 3 Enlarged view of position C in the middle.

[0023] Figure 8 for Figure 4 Enlarged view of position D in the middle.

[0024] To make the diagram clearer, Figures 2 to 4 The first spring was cut off. DETAILED DESCRIPTION

[0025] Referring to the accompanying drawings, the present invention comprises a cylinder 1 and a cylinder 2, the right end of the cylinder 2 coaxially penetrates into the cylinder 1 from the left end of the cylinder 1 and can slide axially, a first spring 3 is installed between the right end of the cylinder 1 and the left end of the cylinder 2, when the cylinder 2 extends into the cylinder 1, the first spring 3 will be compressed to buffer the extension process; and further comprises a first locking unit and a second locking unit:

[0026] The first locking unit includes a first tapered hole 4 opened on the right end face of the cylinder 2, the large end of the first tapered hole 4 faces rightward, a first inertia member is installed in the cylinder 1, the first inertia member can slide axially in the cylinder 1, the left end of the first inertia member is a cone adapted to the first tapered hole 4, the side wall of the first tapered hole 4 is uniformly distributed with first through holes 5 perpendicular to the axis, each first through hole 5 is installed with a first clamping block 6, the inner end of the first clamping block 6 extends into the first tapered hole 4, a plurality of first annular grooves 7 are uniformly distributed axially on the side wall of the cylinder 1, and the first After the outer end of the clamping block 6 extends out, it will be stuck in the first annular groove 7. The first clamping block 6 is installed with a second spring 8 to reset it inwards. When the conical end of the first inertia member moves into the first conical hole 4, the conical surface of the first inertia member pushes the inner end of the first clamping block 6 to make the first clamping block 6 extend outwards. The outer end of the first clamping block 6 is stuck in the first annular groove 7, locking the cylinder 1 and the column 2 so that they cannot slide relative to each other axially. After the column 2 and the cylinder 1 are locked, the two become a rigid part, limiting the components at both ends to avoid collision between the two components.

[0027] The second locking unit comprises a second inertia member coaxially sleeved on the cylinder 2, the second inertia member is located on the left side of the cylinder 1, a second tapered hole 9 with a large end facing right is opened on the right end surface of the second inertia member, the left end of the cylinder 1 is tapered with the second tapered hole 9 adapted, a second through hole 10 perpendicular to the axis is opened on the conical side wall of the left end of the cylinder 1, a second clamping block 11 is installed in each second through hole 10, the outer end of the second clamping block 11 contacts the inner wall of the second tapered hole 9, a plurality of second annular grooves 12 are uniformly distributed axially on the outer wall of the cylinder 2, the inner end of the second clamping block 11 will be stuck in the second annular groove 12 after extending, and a third spring 13 is installed on the second clamping block 11 to reset it outward; when the tapered end of the cylinder 2 moves into the second tapered hole 9, the side wall of the second tapered hole 9 will push the second clamping block 11 inward so that the inner end of the second clamping block 11 is stuck in the second annular groove 12, and the cylinder 1 and the cylinder 2 are locked so that the two become a rigid member.

[0028] The first inertia member is of split type, including a first inertia block 14 on the right and a conical head 15 on the left. A fourth spring 16 is installed between the conical head 15 and the first inertia block 14. When the cylinder 2 is impacted and moves suddenly to the right, the first inertia block 14 remains stationary due to its large inertia, and the conical head 15 is pushed to move to the right. The fourth spring 16 is compressed, thereby delaying the extension process of the first clamping block 6 and appropriately buffering the locking action of the first locking unit.

[0029] The second inertia member is a split type, including a second inertia block 17 on the left and a conical sleeve 18 on the right. A fifth spring 19 is installed between the conical sleeve 18 and the second inertia block 17. When the cylinder 1 is impacted and moves suddenly to the left, the second inertia block 17 remains stationary due to its large inertia, the conical sleeve 18 is pushed to the left, and the fifth spring 19 is compressed, thereby delaying the extension process of the second clamping block 11 and appropriately buffering the locking action of the second locking unit.

[0030] A strong buffer 20 is installed at the left end of the cylinder 2 and the right end of the cylinder 1. The strong buffer 20 can be a spring with a large elastic coefficient, or an elastic material such as rubber, or a hydraulic damping buffer element. When the cylinder 2 and the cylinder 1 are locked as rigid parts, the strong buffers 20 at both ends can strongly damp large impacts, and dissipate energy of the impact as much as possible while ensuring that the components at both ends do not collide. The strong buffer 20 can also be a speed-locking damping component. Under the premise that the cylinder 2 and the cylinder 1 are locked with acceleration as a variable, an additional layer of locking with speed as a variable is added as a double insurance.

[0031] A protective sleeve 21 is fixed outside the cylinder 1, and the second locking unit is located inside the protective sleeve 21, so that the first spring 3 will not interfere with the second locking unit.

[0032] A first pull rope 22 is connected between the first inertia block 14 and the right end of the cylinder 2, and when the cylinder 2 moves to the left, the first inertia block 14 can be pulled to move synchronously to the left.

[0033] A second pull rope 23 is connected between the second inertia block 17 and the left end of the cylinder 1, and when the cylinder 1 moves to the right, the second inertia block 17 can be pulled to move to the right synchronously.

[0034] The outer end of the first clamping block 6 and the inner end of the second clamping block 11 are both triangular, the cross-sections of the first annular groove 7 and the second annular groove 12 are both triangular, and there is no spacing between adjacent annular grooves. Regardless of any axial position, the clamping block can extend into one of the annular grooves.

[0035] The slope of the inclined surface at the tip of the block meets the self-locking condition of the inclined surface, that is, the component force generated by the pressure between the block and the extrusion surface of the annular groove to push the block out of the groove is smaller than the reverse component force generated by the friction between the extrusion surfaces, so that when the block is subjected to the axial locking force of the cylinder 2 and the cylinder 1, the block will not be squeezed out of the annular groove. The self-locking condition can be obtained by simple force analysis and calculation, which will not be elaborated in this article.

[0036] The specific working principle of the present invention is as follows:

[0037] The device is connected between two components that will move relative to each other, and the strong buffers 20 at both ends are respectively against one component. When the two components are relatively still, under the action of the second spring 8 and the third compression spring, the first clamping block 6 and the second clamping block 11 are retracted in the through hole and do not extend into the annular groove; when a slight shake or slow expansion and contraction deformation occurs between the two components, since the acceleration of the cylinder 2 and the cylinder 1 is small, the compression amount of the fourth spring 16 and the fifth spring 19 is also small, that is, the first inertia member and the second inertia member will be slowly pushed by the cylinder 2 or the cylinder 1, and the first clamping block 6 and the second clamping block 11 will not be ejected, the cylinder 2 and the cylinder 1 are not locked, and the first spring 3 dissipates energy and buffers the shake.

[0038] When one or both components are impacted and move suddenly, the sudden movement of cylinder 2 or cylinder 1 will generate a large acceleration. Since the first inertia member and the second inertia member have large inertia, a large thrust is required to generate an acceleration matching cylinder 2 and cylinder 1. Therefore, the compression amount of the fourth spring 16 and the fifth spring 19 increases, the conical head 15 is pressed into the first conical hole 4, or the conical section of the cylinder 1 is pressed into the conical sleeve 18, and the first clamping block 6 or the second clamping block 11 is pushed by the cone to extend into the first annular groove 7 or the second annular groove 12, thereby locking cylinder 2 and cylinder 1. At this time, cylinder 2 and cylinder 1 are equivalent to a rigid member to limit the movement of the components at both ends to avoid collision between the two components. At the same time, after cylinder 2 and cylinder 1 are locked, the strong buffers 20 at both ends work to buffer the impact as much as possible without collision between the components. If a speed locking damping member is used, double-layer insurance can be applied to the locking.

[0039] After the violent impact disappears, the components automatically reset under the action of the springs, and the cylinder 2 and the barrel 1 are unlocked.

[0040] The present invention utilizes the principle of inertia and uses acceleration as a variable to lock the damping component. It can provide a relatively low-rigidity buffering effect in the event of slight shaking, effectively absorb energy, and provide a movable margin for the expansion and contraction deformation of the component. When the component is subjected to a violent impact, it can quickly respond to perform a locking action, and timely limit the displacement of the violent impact, greatly improving the response speed of limiting displacement, and can more effectively prevent the component from colliding when subjected to a violent impact. At the same time, after locking, the strong buffer component 20 intervenes to apply strong damping to the violent impact for buffering and energy dissipation, and blockage and dredging are applied at the same time, so as to eliminate the impact of the violent impact as much as possible under the premise of ensuring that no collision occurs; in combination with a speed-locked damping component, it can perform a locking action more comprehensively for the impact type.

Claims

1. An acceleration locking bridge buffer limiter, characterized in that: The invention comprises a cylinder (1) and a column (2), wherein the right end of the column (2) coaxially penetrates into the cylinder (1) from the left end of the cylinder (1) and can slide axially, and a first spring (3) is installed between the right end of the cylinder (1) and the left end of the column (2); and further comprises a first locking unit and a second locking unit: The first locking unit comprises a first tapered hole (4) formed on the right end surface of the cylinder (2), the large end of the first tapered hole (4) facing rightwards, a first inertia member being arranged in the cylinder (1), the first inertia member being axially slidable in the cylinder (1), the left end of the first inertia member being tapered and adapted to the first tapered hole (4), the side wall of the first tapered hole (4) being uniformly distributed with first through holes (5) perpendicular to the axis, each of the first through holes (5) being installed with a first clamping block (6), the inner end of the first clamping block (6) extending into the first tapered hole (4), a plurality of first annular grooves (7) being uniformly distributed in the axial direction on the side wall of the cylinder (1), the outer end of the first clamping block (6) being inserted into the first annular groove (7) after being extended, and a second spring (8) being installed on the first clamping block (6) for returning the first clamping block inwards; The second locking unit comprises a second inertia member coaxially sleeved on the cylinder (2), the second inertia member being located on the left side of the cylinder (1), a second tapered hole (9) with a larger end facing rightward being formed on the right end surface of the second inertia member, the left end of the cylinder (1) being tapered to match the second tapered hole (9), a second through hole (10) perpendicular to the axis being formed on the tapered side wall of the left end of the cylinder (1), a second clamping block (11) being arranged in each second through hole (10), the outer end of the second clamping block (11) being in contact with the inner wall of the second tapered hole (9), a plurality of second annular grooves (12) being uniformly distributed axially on the outer wall of the cylinder (2), the inner end of the second clamping block (11) being inserted into the second annular groove (12) after being extended, and a third spring (13) being arranged on the second clamping block (11) to reset it outwards; The first inertia member is of a split type, comprising a first inertia block (14) on the right and a conical head (15) on the left, a fourth spring (16) being installed between the conical head (15) and the first inertia block (14); a first pull rope (22) is connected between the first inertia block (14) and the right end of the cylinder (2); The second inertia member is of a split type, comprising a second inertia block (17) on the left and a conical sleeve (18) on the right, a fifth spring (19) being installed between the conical sleeve (18) and the second inertia block (17); a second pull rope (23) is connected between the second inertia block (17) and the left end of the cylinder (1).

2. The acceleration locking type bridge buffer limiter according to claim 1, characterized in that: A strong buffer (20) is installed on the left end of the column (2) and the right end of the cylinder (1).

3. The acceleration locking type bridge buffer limiter according to claim 1, characterized in that: A protective sleeve (21) is fixed outside the cylinder (1), and the second locking unit is located inside the protective sleeve (21).

4. The acceleration locking type bridge buffer limiter according to claim 1, characterized in that: The outer end of the first clamping block (6) and the inner end of the second clamping block (11) are both triangular in shape, the cross-sections of the first annular groove (7) and the second annular groove (12) are both triangular in shape, and adjacent annular grooves are arranged without spacing.

5. The acceleration locking type bridge buffer limiter according to claim 1, characterized in that: The slope of the inclined surface at the tip of the clamping block satisfies the inclined surface self-locking condition.

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