CN213449710U

CN213449710U - Viscous damper with explosion-proof cavity

Info

Publication number: CN213449710U
Application number: CN201922193411.8U
Authority: CN
Inventors: 苏毅; 李中义; 郭语; 张冲; 卢伟; 郭鹏
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2021-06-15
Anticipated expiration: 2029-12-10

Abstract

The invention discloses an explosion-proof cavity viscous damper, and belongs to the technical field of structural seismic resistance and shock absorption. When the earthquake action occurs, the structure can generate rapid vibration, the lower piston in the viscous damper main cylinder generates left-right reciprocating motion, the damping medium is extruded to pass through the damping hole, but the damping medium is difficult to rapidly follow the damping hole due to the small cross-sectional area of the damping hole, so that the pressure of the left main cylinder and the pressure of the right main cylinder are increased greatly, and the explosion chamber can occur. According to the invention, the viscous damper is internally provided with the liquid through pipe which connects the left main cylinder and the right main cylinder, and the liquid through pipe is internally provided with the explosion-proof cavity shunting device. Within the pressure allowable range, the damper works normally; when the pressure exceeds the limit value, the damping medium extrudes the upper piston through the flow limiting pipe, and the communication area of the liquid through pipe is controlled, so that the pressure is automatically relieved in the working process of the damper, and cylinder explosion is prevented. The invention has simple structure, adjusts the pressure intensity through the mechanical principle, has good safety and durability, and has good damping protection effect.

Description

Viscous damper with explosion-proof cavity

Technical Field

The invention relates to the technical field of structural seismic and shock absorption engineering dampers, in particular to an explosion-proof cavity viscous damper.

Background

Earthquake is one of the main natural disasters threatening the safety of major engineering structures, so the structure shock absorption control becomes an effective measure for the civil engineering disaster prevention and reduction work.

In the current structure shock attenuation field, the viscous damper is a very common damping device, and the viscous damper drives the piston in the structure to move when the structure shakes, and the damping medium in the oppression master cylinder produces throttling resistance through the damping hole, reaches the effect of shock attenuation power consumption. The viscous damper is an effective building structure damping protection device and can effectively reduce the earthquake reaction of the structure.

However, under the action of an earthquake, a piston in the master cylinder can rapidly reciprocate, and the sectional area of the damping hole is small, so that the pressure in the master cylinder is rapidly increased, and the potential safety hazard of cavity explosion can be generated. Under the background environment, an explosion-proof cavity viscous damper is produced, when the pressure in a main cylinder of the damper is too high, a damping medium passes through a liquid through pipe and reaches a right main cylinder from a left main cylinder or reaches a left main cylinder from the right main cylinder, and the purpose of rapid pressure relief is achieved. Meanwhile, in the allowable range of pressure intensity, a damping medium passes through the damping hole to generate fluid resistance so as to achieve the effects of damping and energy consumption.

Disclosure of Invention

In order to solve the technical problems, the invention provides the viscous damper which has a simple structure and prevents the excessive pressure intensity of the damping medium, so that the damping and energy dissipation effects can be improved, and the safety and the durability of the structure can be improved. According to the invention, the liquid-communicating pipe is communicated when the pressure difference between the two sides is overlarge through the flow-limiting pressure regulating device, so that the purpose of regulating the pressure is achieved, and the pressure difference of the master cylinder cavity is reduced.

The technical scheme adopted by the invention for solving the technical problems is as follows: the viscous damper with the explosion-proof cavity mainly comprises a damping energy consumption unit and an explosion-proof cavity shunting unit, wherein the damping energy consumption unit and the explosion-proof cavity shunting unit are both made of Q235, Q345 and other steel materials.

An anti-explosion cavity viscous damper mainly comprises a damping energy consumption unit and an anti-explosion cavity shunting unit; the damping energy consumption unit consists of a left connecting earring, an auxiliary cylinder, a piston rod, a right connecting earring, a lower piston, a left main cylinder, a right main cylinder, a damping hole and a blocking device; the explosion-proof cavity shunting unit consists of a liquid through pipe, a flow limiting switch, an upper piston, a limiting spring and a piston hole, and the limiting spring, the upper piston and the flow limiting switch form a pressure control unit.

When the structure is subjected to the action of earthquake and strong wind, the lower piston reciprocates left and right, in order to prevent the damper from generating overlarge displacement, in particular to prevent the lower piston from blocking the through duct of the liquid through pipe and the left and right main cylinders, blocking devices are arranged in the left main cylinder and the right main cylinder to limit the movement position of the lower piston.

The explosion-proof cavity shunting unit consists of a liquid through pipe, a flow limiting switch, an upper piston, a limiting spring, a piston hole and a pressure control unit. The lower parts of the two ends of the liquid through pipe are respectively welded on the left main cylinder and the right main cylinder, so that the left main cylinder can be communicated with the right main cylinder; the flow limiting pipe is a steel round pipe and is communicated with the liquid through pipe, and the damping medium entering the liquid through pipe can be divided.

The pressure control unit is internally provided with a limiting spring, the limiting spring is connected with the upper piston, and the position of the upper piston can be adjusted through the stress compression of the limiting spring and the self deformation restorability. A current-limiting switch is arranged in the current-limiting tube, and the current-limiting switch can rotate left and right under the extrusion of the damping medium.

The upper piston is provided with a piston hole and is connected with a limiting spring, the upper piston is displaced by the contraction of the limiting spring, and the area communicated with the liquid through pipe is controlled.

The cross-sectional area of the liquid through pipe is three times or more than that of the damping hole, so that the pressure in the left main cylinder and the right main cylinder can be rapidly stabilized after the liquid through pipe is communicated, the damping medium can be ensured to rapidly pass through, the influence on key parameters of the damper is reduced, and the risk coefficient is reduced.

The length and the type of the limiting spring can be selected according to preset limit pressure in the left main cylinder and the right main cylinder, the upper piston is guaranteed to block the liquid through pipe in a static state, and when the pressure is guaranteed to be within an allowable range, damping media flow through the damping holes, and the damping effect is achieved.

When the lower piston moves to the left side, an extrusion medium passes through the damping hole to achieve an energy consumption effect, meanwhile, part of the damping medium enters the flow limiting pipe to enable the flow limiting switch to rotate leftwards, if the pressure exceeds the pressure limited by the damper, the damping medium extrudes the limiting spring to push the upper piston to communicate the piston hole with the liquid through pipe, and the damping medium moves from the left main cylinder to the right main cylinder through the liquid through pipe, so that the pressure of the single-side main cylinder is rapidly reduced, and the purpose of preventing cylinder explosion is achieved.

When the lower piston faces the right side, the extrusion medium passes through the damping hole to achieve the energy consumption effect, meanwhile, part of the damping medium enters the flow limiting pipe to enable the flow limiting switch to rotate rightwards, if the pressure exceeds the pressure limited by the damper, the damping medium extrudes the limiting spring to push the upper piston to communicate the piston hole with the liquid through pipe, the damping medium is enabled to move from the right main cylinder to the left main cylinder through the liquid through pipe, and therefore the purposes of rapidly reducing the pressure of the main cylinder on one side and preventing cylinder explosion are achieved.

Compared with the prior art, the invention has the advantages that: (1) the anti-explosion cavity viscous damper is simple in structure, can automatically adjust the pressure intensity through machinery, can be prefabricated and processed in a factory for all parts and accessories, can be replaced and maintained, and is economical and reasonable; (2) the anti-explosion cavity viscous damper is directly connected with a structure through the left and right connecting earrings, so that the construction is simple and convenient; (3) the utility model provides a viscous damper in explosion-proof chamber, can guarantee that the attenuator hysteresis curve is stable, the shock attenuation effect is better, and factor of safety is higher, and structural durability is high, can use with low costs for a long time. Therefore, the explosion-proof cavity viscous damper has the advantages of excellent performance, low cost, relatively simple structure, convenience in maintenance and replacement, high safety coefficient and high structural durability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of an explosion-proof chamber viscous damper;

FIG. 2 is a schematic diagram of the flow direction of the damping medium of the pressure regulating device and the movement of the upper piston when the lower piston moves to the left;

FIG. 3 is a schematic diagram of the flow direction of the damping medium of the pressure regulating device for rightward movement of the lower piston and the movement of the upper piston;

FIG. 4 is a schematic diagram of an elevation of an explosion-proof chamber viscous damper;

FIG. 5 is a sectional view taken along line 1-1;

fig. 6 is a cross-sectional view of the blocking device.

Wherein: 1. the device comprises a left connecting lug, a left main cylinder, a right main cylinder, a left connecting lug, a right connecting lug, a piston rod, a right connecting lug, a piston rod, a right connecting lug, a left piston, a right main cylinder, a damping hole, a blocking device, a liquid through pipe, 11, a flow limiting pipe, 12, a flow limiting switch, 13, an upper piston, 14, a limiting spring, 15, a piston hole, 16 and a pressure control unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic view of the overall structure of an explosion-proof chamber viscous damper according to the present invention. As shown in FIG. 1, the anti-explosion cavity viscous damper mainly comprises a main cylinder, a secondary cylinder, a lower piston, a piston rod, a liquid through pipe and a pressure control device, wherein the main cylinder is divided into a left main cylinder 6 and a right main cylinder 7, and the left main cylinder 6 and the right main cylinder 7 are filled with the same damping medium. A piston rod 3 is arranged in the main cylinder, a lower piston 5 is welded on the piston rod 3, the piston rod 3 and the lower piston 5 can move back and forth along the axial directions of a left main cylinder 6 and a right main cylinder 7, however, under the action of an earthquake, the piston in the main cylinder can rapidly reciprocate, and due to the fact that the cross section area of a damping hole is small, the pressure intensity in the main cylinder can be increased rapidly, and the potential safety hazard of cavity explosion can be generated. The invention provides an improvement method of a traditional viscous damper, which is used for realizing controllable adjustment of pressure intensity in the damper and is characterized by comprising the following construction steps:

(1) as shown in fig. 1, welding the prefabricated left side of the main cylinder with the prefabricated right side of the auxiliary cylinder 2, welding the left connecting lug 1 on the left side of the auxiliary cylinder 2, welding the right connecting lug 4 on the right side of the piston rod 3, opening holes on the upper parts of the left main cylinder 6 and the right main cylinder 7, connecting liquid pipes 10 through sealing welding, and arranging sealing elements at each gap or hole;

(2) as shown in fig. 1, an opening of a liquid flowing pipe 10 is connected with a flow limiting pipe 11, and the liquid flowing pipe 10 and the flow limiting pipe 11 form a communication loop;

(3) as shown in fig. 5, the upper end of the limit spring 15 is welded to the upper side of the pressure control unit 16, the lower end of the limit spring 14 is welded to the upper piston 13, the piston hole 15 is closed to the liquid pipe 10, and the flow limit switch 12 which can be rotated left and right is provided in the flow limit pipe 11, thereby forming the explosion-proof chamber shunt unit as a whole.

When the explosion-proof cavity viscous damper works, the piston can move back and forth in the main cylinder and the auxiliary cylinder, and the damping medium can generate viscous resistance when passing through the damping hole, so that the effects of resisting vibration and reducing resistance are achieved.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and that various modifications, equivalents and improvements within the spirit and scope of the present invention may be made by those skilled in the art.

Claims

1. An anti-explosion cavity viscous damper mainly comprises a damping energy consumption unit and an anti-explosion cavity shunting unit; the damping energy consumption unit consists of a left connecting earring (1), an auxiliary cylinder (2), a piston rod (3), a right connecting earring (4), a lower piston (5), a left main cylinder (6), a right main cylinder (7) and a damping hole (8); the method is characterized in that: blocking devices (9) are arranged on the inner walls of the left main cylinder (6) and the right main cylinder (7); the explosion-proof cavity shunting unit consists of a liquid through pipe (10), a current limiting pipe (11), a current limiting switch (12), an upper piston (13), a limiting spring (14), a piston hole (15) and a pressure control unit (16), wherein the pressure control unit (16) comprises the limiting spring (14), the upper piston (13) and the current limiting switch (12); the limiting spring (14) is connected with the upper piston (13) through welding; the upper piston (13) is provided with a piston hole (15); the current limiting switch (12) is arranged in the current limiting pipe (11).

2. The explosion proof chamber viscous damper of claim 1, characterized in that: when the lower piston (5) moves left and right, the lower piston collides with the blocking device (9) to limit the lower piston (5) to continuously move.

3. The explosion proof chamber viscous damper of claim 1, characterized in that: the liquid through pipe (10) is a circular pipe, and two ends of the liquid through pipe are respectively communicated with the left main cylinder (6) and the right main cylinder (7).

4. The explosion proof chamber viscous damper of claim 1, characterized in that: the flow limiting pipe (11) is a round pipe and is communicated with the liquid through pipe (10).

5. The explosion proof chamber viscous damper of claim 1, characterized in that: the cross-sectional area of the liquid through pipe (10) is three times of that of the damping hole (8).

6. The explosion proof chamber viscous damper of claim 1, characterized in that: the length and the type of the limiting spring (14) can be selected according to preset limiting pressure intensities in the left main cylinder (6) and the right main cylinder (7), and the upper piston (13) blocks the liquid through pipe (10) in a static state.

7. The explosion proof chamber viscous damper of claim 1, characterized in that: when the lower piston (5) moves to the left side, the extrusion medium passes through the damping hole (8); part of medium enters the flow limiting pipe (11), the flow limiting switch (12) rotates leftwards to block the left side of the flow limiting pipe (11) to prevent the medium from passing through, and when the pressure is too high, the limiting spring (14) is extruded to enable the upper piston (13) to displace, so that the piston hole (15) is communicated with the liquid through pipe (10).

8. The explosion proof chamber viscous damper of claim 1, characterized in that: when the lower piston (5) moves towards the right side, the extrusion medium passes through the damping hole (8); part of medium enters the flow-limiting pipe (11), the flow-limiting switch (12) is enabled to rotate rightwards to block the right side of the flow-limiting pipe (11) to prevent the medium from passing through, and when the pressure is too high, the limiting spring (14) is extruded to enable the upper piston (13) to displace, so that the piston hole (15) is communicated with the liquid through pipe (10).