CN219221369U - One-way valve, piston with same and variable-rigidity viscous damper - Google Patents

Abstract

The utility model discloses a one-way valve, a piston with the one-way valve and a variable-rigidity viscous damper, and relates to the technical field of bridge anti-seismic dampers, wherein the one-way valve comprises a valve body, a connecting column, a deformable baffle and a stop block; the edge of the deformable baffle is in sealing fit with the inner side wall of the valve body, and then the baffle is matched with the baffle block to realize the circulation and closure of liquid in the one-way valve; the piston comprises a piston body; the piston body provides support for the device and can also control the flow speed and the flow of the liquid medium through the damping holes arranged on the piston body; the variable-stiffness viscous damper comprises a cylinder body, a partition plate, a piston rod, a reset spring, a head connecting ring and a tail connecting ring; the piston rod is pushed by the head connecting ring and the tail connecting ring which are connected with the bridge and the bridge pier, so that damping fluid in the cylinder body flows, and earthquake impact is relieved. According to the utility model, the one-way valve is arranged on the piston in the viscous damper, so that the rigidity is variable, and the piston can be automatically reset to cope with earthquakes of different grades.

Description

One-way valve, piston with same and variable-rigidity viscous damper

Technical Field

The utility model relates to the technical field of bridge anti-seismic dampers, in particular to a one-way valve, a piston with the one-way valve and a variable-rigidity viscous damper.

Background

Earthquake and strong wind are natural disasters with very high destructiveness, and the disasters have very high destructiveness to large bridges and high-rise buildings, so that serious potential safety hazards and economic losses can be caused, and the problem of how to furthest lighten the threat of the earthquake disasters and the wind disasters to the safety of human beings and the damage to the economy is very serious.

The traditional anti-seismic thought is to increase the rigidity of the structure to resist earthquake by increasing the dead weight and the cross section of the bridge pier or increasing the reinforcing bars and the like, and the energy generated by the vibration of the structure is consumed by utilizing the plastic deformation energy consumption and hysteresis energy consumption of members such as beams, columns and the like, so that the energy consumption mode with the cost of damage or even destruction of the structure is not preferable. In recent years, by arranging the energy dissipation device on the structure, the energy dissipation device consumes the vibration energy of the structure by utilizing the relative displacement and the relative speed generated by the structure during vibration, and the vibration reaction of the structure is reduced, so that the purposes of damping and dissipating energy are achieved. The common damping and energy dissipating device is divided into a speed type and a displacement type, the metal damper and the friction damper belong to displacement type dampers, the consumed energy and the provided damping force are related to the relative displacement generated when the structure vibrates, and the larger the relative displacement is, the better the energy dissipation and shock absorption effect is; viscoelastic dampers and viscous dampers belong to velocity type dampers, and the larger the relative velocity of the structure during vibration, the larger the damping force can be provided by the two dampers.

However, the requirements of the energy dissipation and shock absorption devices for different grades of earthquakes are different, and under the condition of facing small earthquakes or wind loads, the energy dissipation and shock absorption devices are required to provide an initial rigidity for the structure to resist the earthquake loads and the wind loads; under medium-high intensity earthquake, larger damping needs to be provided for the structure, energy brought by the earthquake is consumed, and damage of the earthquake to the structure is reduced. However, the viscous damper itself has no rigidity, and it is difficult to realize variable rigidity. Meanwhile, the viscous damper does not have a self-resetting function, and the structure can generate larger residual displacement to influence the traffic after earthquake.

Therefore, how to provide a one-way valve with self-resetting function, a piston with the one-way valve and a variable-stiffness viscous damper which can provide rigidity and damping is a problem to be solved by those skilled in the art.

Disclosure of Invention

In view of the above, the present utility model provides a one-way valve, a piston and a variable stiffness viscous damper with the same, which aims to solve the above technical problems.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a one-way valve, comprising:

the valve body is provided with an opening at the top end and a plurality of runner holes at the bottom end;

the bottom end of the connecting column is fixed at the central position of the bottom surface of the inner cavity of the valve body, an annular flow passage is formed between the connecting column and the side wall of the valve body, and the annular flow passage is communicated with the flow passage hole;

the deformable baffle plate is fixed at the top end of the connecting column, and the edge of the deformable baffle plate is in sealing fit with the inner side wall of the valve body;

the limiting part is fixed on the inner side wall of the valve body and is positioned between the deformable baffle and the top opening of the valve body.

According to the technical scheme, the connecting column is fixed at the central position of the bottom surface of the inner cavity of the valve body, the annular flow channel for liquid circulation is formed between the connecting column and the side wall of the valve body, the deformable baffle is fixed at the top end of the connecting column, the edge of the deformable baffle is in sealing fit with the inner side wall of the valve body, the opening and closing of the one-way valve can be realized through the bending and resetting of the deformable baffle, the bending and resetting of the deformable baffle are determined according to the pressure intensity of the one-way valve, the liquid pressure is blocked when the liquid pressure intensity is low, and the liquid pressure is circulated when the liquid pressure intensity is high, so that the device can realize the opening and closing of the valve according to the change of the external pressure intensity.

Preferably, in the above one-way valve, the limiting portion includes a plurality of stoppers fixed on an inner side wall of the valve body, and the plurality of stoppers abut against the deformable baffle. Because the stop block is fixed on the inner side wall of the valve body and is abutted with the deformable baffle plate, when the liquid flows reversely, the check valve is in a closed state no matter how large the pressure exists due to the stop block, so that the unidirectional property of the check valve for circulating the liquid is ensured.

Preferably, in the one-way valve, the deformable flap is a plastically deformable metal material. Because the unique material of deformable separation blade, the flexible separation blade can realize crooked and the reset many times to ensure the circulation of liquid medium and block, when guaranteeing the unidirectional of check valve circulation liquid, still increased the life of check valve.

The beneficial effects of the technical scheme are as follows: when the pressure intensity of the one-way valve is different, the deformable baffle plate in the one-way valve can change along with the pressure intensity, and when the one-way valve is in a closed state, the stiffness of the device is provided; when the one-way valve is in a circulation state, the rigidity of the device is variable; thus facilitating control of the flow and accuracy of the check valve.

The utility model also provides a piston, which comprises a piston body, wherein a plurality of damping holes are formed in the piston body, and each damping hole is provided with one-way valve with one fixed end; the valve bodies mounted on both sides of the piston body are opposite in mounting direction, and the number of the valve bodies mounted on both sides of the piston body is equal.

Through the technical scheme, when the piston body generates relative displacement, circulating liquid repeatedly flows in the holes formed in the piston body, and the damping holes are provided with the check valves with opposite directions and equal quantity, so that the energy required for driving the piston body to reciprocate is the same, the balance of the piston body is ensured, and the stability of the device is improved.

Preferably, in the above-mentioned piston, the plurality of damping holes are uniformly distributed on the piston body in a ring shape; the damping holes are used for circulating liquid media, and because the damping holes are uniformly distributed in a ring shape, the circulating liquid media have lower loss on the piston body in the process of acting on the piston, and the piston body can change the pressure at two sides of the piston in the reciprocating motion, and the energy generated by acting on the piston can be manually regulated through the number of the damping holes, so that the piston is not limited in the current known field any more, and the application scene of the piston of the device is enlarged.

Preferably, in the above piston, a plurality of valve bodies on the same side of the piston body are mounted on a plurality of damping holes at intervals, the damping holes on a single side are arranged at intervals, and the two damping holes are not affected each other, so that balance of the piston body is further ensured.

Preferably, in the above piston, a connecting hole is formed at a central position of the piston body. The connecting hole is used for connecting and fixing the piston body and other structures, the integrity of the piston is enhanced by the connecting hole, and the stability of the device is improved.

The beneficial effects of the technical scheme are as follows: because the damping holes are provided with the check valves with opposite directions and equal quantity, the unidirectional flow property of the liquid medium is ensured, when the flowing direction of the liquid flowing medium is consistent with the installation direction of the check valve and reaches a certain pressure, the check valve is opened, and the energy generated by acting the piston is increased, so that on the premise that the aperture of the damping holes is the same, no matter how the piston body moves, the rigidity and the energy provided by the whole device for the structure are the same.

The utility model also provides a variable stiffness damper, comprising:

the cylinder body is internally fixed with a partition plate, the partition plate divides the cylinder body into a first sealing cavity and a second sealing cavity, and the piston is connected in a sliding manner in the second sealing cavity; viscous damping medium is filled in the second sealing cavity;

the piston rod sequentially penetrates through the partition plate, the piston body and the cylinder body, the piston rod is fixedly connected with the piston body, and the piston rod is in sealing sliding connection with the partition plate and the cylinder body; the piston rod positioned in the first sealing cavity is sleeved with a return spring, and two ends of the return spring are respectively and fixedly connected between the end head of the piston rod and the partition plate.

Through the technical scheme, the variable stiffness damper provided by the utility model has the advantages that when the variable stiffness damper is excited by the outside, the piston starts to reciprocate, and the volume of the piston rod entering the cylinder body is constant, so that the pressure of liquid in the cylinder cannot be influenced, the phenomenon of vacuum in the cylinder body cannot be caused, and the piston rod cannot be supported to move freely because the pressure in the cylinder body is overlarge. The piston rod viscous damper has symmetrical structure, stable damping force output under various working conditions, simple manufacturing process and full hysteresis curve, and has good energy consumption capability; in addition, one end of the return spring is fixed with one end of the piston rod, the other end of the return spring is fixed with the partition plate, when an earthquake happens, the piston rod reciprocates to drive the return spring to stretch or compress to provide rigidity for the structure, and the return force can be provided after the earthquake is finished, so that the piston returns to the position before the earthquake, and residual displacement between pier beams is reduced.

Preferably, in the variable stiffness damper, a head connecting ring is fixed on an outer side wall of the first sealing cavity, and a tail connecting ring is fixed at an end of the piston rod far away from the first sealing cavity. The head connecting ring and the tail connecting ring can enable the relative displacement generated by the damper due to earthquake to be more accurate; and when the piston rod is reset after earthquake, the piston rod and the piston can be helped to move smoothly.

Compared with the prior art, the utility model discloses a one-way valve, a piston with the one-way valve and a variable-rigidity viscous damper with the one-way valve, and has the following beneficial effects:

1. according to the utility model, through the arrangement of the one-way valve device, the unidirectional property of the flowing liquid of the one-way valve is ensured, the number of the damping holes for working is reduced, the damping force is increased, a large amount of earthquake energy can be dissipated, and the earthquake resistance is effectively realized.

2. According to the utility model, through the arrangement of the piston device, the rigidity and the damping of the structure of the whole device can be changed according to different external conditions, so that the device is suitable for wind load and earthquake of various grades.

3. By arranging the variable stiffness damper device, the utility model can provide restoring force after earthquake along with the addition of the spring, so that the piston returns to the original position, and the residual displacement between pier beams is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a closed state of a check valve according to the present utility model;

FIG. 2 is a schematic diagram of the structure of the opened state of the check valve according to the present utility model;

FIG. 3 is a schematic view of a structure of one side of a piston body according to the present utility model;

FIG. 4 is a schematic view of another side of the piston body according to the present utility model;

FIG. 5 is a schematic diagram of a variable stiffness viscous damper according to the present utility model.

Wherein:

the valve comprises a valve body, a 2-runner hole, a 3-connecting column, a 4-annular runner, a 5-deformable baffle, a 6-limiting part, a 7-stop block, an 8-piston body, a 9-damping hole, a 10-connecting hole, an 11-cylinder body, a 12-partition plate, a 13-first sealing cavity, a 14-second sealing cavity, a 15-piston rod, a 16-return spring, a 17-head connecting ring and a 18-tail connecting ring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1:

referring to fig. 1-2, an embodiment of the present utility model discloses a check valve, comprising:

the valve body 1, the top of the valve body 1 has openings, the bottom of the valve body 1 has multiple runner holes 2;

the bottom end of the connecting column 3 is fixed at the central position of the bottom surface of the inner cavity of the valve body 1, an annular flow channel 4 is formed between the connecting column 3 and the side wall of the valve body, and the annular flow channel 4 is communicated with the flow channel hole 2;

the deformable baffle plate 5 is fixed at the top end of the connecting column 3, and the edge of the deformable baffle plate 5 is in sealing fit with the inner side wall of the valve body 1;

the limiting part 6 is fixed on the inner side wall of the valve body 1 and is positioned between the deformable baffle 5 and the top end opening of the valve body 1.

In order to further optimize the technical scheme, the limiting part 6 comprises a plurality of stop blocks 7 on the inner side wall of the fixed character valve body 1, and the stop blocks 7 are abutted with the deformable stop pieces 5; the deformation direction of the deformable baffle 5 is limited by the stop 7, so that the deformable baffle 5 can only bend towards the inner side of the valve body 7, thereby ensuring the unidirectional flow of the check valve.

In order to further optimize the technical scheme, the deformable baffle plate 5 is made of a plastic deformable metal material, and the deformation and the resetting of the deformable baffle plate 5 are determined according to the pressure intensity of the check valve, so that the pressure intensity in the check valve can be repeatedly changed; since the deformable baffle 5 is repeatedly subjected to forces in both the forward and reverse directions, the deformable baffle 5 is made of a plastic deformable metal material, such as duralumin, sulfur, tin, and lead.

The working process of the embodiment is as follows:

before the check valve is used, the bottom of the check valve is firstly arranged on the damping hole 9 of the piston body 8, and the opening of the check valve faces to the outer side; when facing small earthquake and wind load, the pressure in the cylinder is smaller, the edge of the deformable baffle 5 is clung to the stop block 7, viscous damping fluid in the cylinder cannot circulate, and rigidity is provided for the whole device; when the pressure in the cylinder is larger in the face of large earthquake and wind load, the deformable baffle 5 bends towards the inside of the valve body 7, at the moment, an annular flow passage 4 is formed between the connecting column 3 and the valve body 7, and then the flow passage hole 2 is used for completing the circulation of viscous damping medium so as to provide larger damping for the device.

The embodiment provides a one-way valve capable of ensuring stable circulation of a liquid flowing medium.

Example 2:

referring to fig. 3-4, an embodiment of the present utility model discloses a piston comprising: the piston comprises a piston body 8, wherein a plurality of damping holes 9 are formed in the piston body 8, and one-way valve of the embodiment 1 is fixed at one end of each damping hole 9; the installation directions of the valve bodies 1 installed at both sides of the piston body 8 are opposite, and the installation numbers of the valve bodies 1 at both sides of the piston body 8 are equal.

In order to further optimize the technical scheme, a plurality of damping holes 9 are uniformly distributed on the piston body 8 in a ring shape; according to the utility model, 6 damping holes 9 are formed in the piston body 8, three one-way valve devices are arranged on each side of the piston body 8, as shown in the positions shown in figures 3-4, due to the one-way fluxion of the one-way valves, the three damping holes 9 on one side can work no matter the piston moves leftwards or rightwards, under the condition of the same aperture, the smaller the number of the damping holes 9 is, the larger the damping force provided by the damper is, the six damping holes 9 with the same cross section area are reduced to three, and under the condition that the movement speed of the piston body 8 is the same, the output energy can be increased by about 30%.

In order to further optimize the technical scheme, a plurality of valve bodies 1 on the same side of the piston body 8 are arranged on a plurality of damping holes 9 at intervals, three damping holes 9 on the single side are arranged at intervals, the two damping holes are not affected by each other, and stable circulation of liquid flowing media is further ensured.

In order to further optimize the above technical solution, a connecting hole 10 is provided in the central position of the piston body 8.

The present embodiment provides a piston that can increase output power and enhance overall device balance and stability.

Example 3:

referring to fig. 5, an embodiment of the present utility model discloses a variable stiffness viscous damper, including:

a cylinder 11, a partition plate 12 is fixed in the cylinder 11, the partition plate 12 divides the cylinder 11 into a first sealing cavity 13 and a second sealing cavity 14, and the piston in the embodiment 2 is slidably connected in the second sealing cavity 14; the second sealed cavity 14 is filled with liquid silicone oil;

the piston rod 15 sequentially penetrates through the partition plate 12, the piston body 8 and the cylinder body 11, the piston rod 15 is fixedly connected with the piston body 8, and the piston rod 15 is in sealing sliding connection with the partition plate 12 and the cylinder body 11; a return spring 16 is sleeved on the piston rod positioned in the first sealing cavity 13, and two ends of the return spring 16 are respectively and fixedly connected between the end head of the piston rod 15 and the partition plate 12; since the volume of the portion of the piston rod 15 entering the cylinder 11 is constant, the piston rod 15 does not affect the pressure of the liquid in the cylinder, the phenomenon of vacuum in the cylinder 11 is avoided, and the piston rod 15 is propped against and cannot move freely due to the overlarge pressure in the cylinder 11.

In order to further optimize the technical scheme, a head connecting ring 17 is fixed on the outer side wall of the first sealing cavity 13, and a tail connecting ring 18 is fixed at the end part of the piston rod 15 far away from the first sealing cavity 13; the head connecting ring 17 and the tail connecting ring 18 of the variable-rigidity viscous damper are respectively connected to the bridge pier and the bridge, and relative displacement is generated between the bridge pier and the bridge when an earthquake occurs, so that relative displacement is generated between the head connecting ring 17 and the tail connecting ring 18, and the relative displacement generated by the damper due to the earthquake is more accurate; when resetting after earthquake, the reset spring can be assisted, so that the piston rod 15 and the piston body 8 can smoothly finish resetting.

The working process of the embodiment is as follows:

when an earthquake happens, relative displacement is generated between the head connecting ring 17 and the tail connecting ring 18, the piston rod 15 moves left and right in the cylinder body 11, so that viscous damping medium passes through the damping hole 9, friction is generated between the viscous damping medium and the damping hole 9, energy generated by the earthquake is converted into heat energy, the purpose of energy consumption is achieved, the return spring 16 correspondingly receives compression or extension along with the left and right movement of the piston rod 15, the return spring 16 can provide a return force, the piston body 8 returns to a pre-earthquake position, and residual displacement between pier beams is reduced. Because the volume of the part of the piston rod 15 entering the cylinder body 11 is constant, the influence of the piston rod 15 on the pressure of liquid in the cylinder can not occur, the phenomenon of vacuum in the cylinder body can not occur, and the piston rod 15 is propped up and cannot move freely because of the overlarge pressure in the cylinder body; therefore, under the action of small earthquake or wind load, the damping hole 9 is closed, and rigidity is provided for the structure to resist the earthquake load and the wind load; under medium-high intensity earthquake, the damping hole 9 is opened, the viscous damper works, and the structure is provided with larger damping, so that earthquake energy is consumed; the check valve also can determine whether to block along with the flowing direction of the liquid, and the check valve circulates when the forward flowing reaches a certain pressure, and the reverse flowing is blocked.

The embodiment provides a variable stiffness viscous damper which can greatly dissipate seismic energy, effectively resist earthquake, provide restoring force after earthquake, enable a piston to return to an original position, and change the rigidity and damping of a structure according to different external conditions so as to adapt to wind load and earthquake of various grades.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A one-way valve, comprising:

the valve comprises a valve body (1), wherein an opening is formed in the top end of the valve body (1), and a plurality of runner holes (2) are formed in the bottom end of the valve body (1);

the bottom end of the connecting column (3) is fixed at the central position of the bottom surface of the inner cavity of the valve body (1), an annular flow channel (4) is formed between the connecting column (3) and the side wall of the valve body, and the annular flow channel (4) is communicated with the flow channel hole (2);

the deformable baffle (5) is fixed at the top end of the connecting column, and the edge of the deformable baffle (5) is in sealing fit with the inner side wall of the valve body (1);

the limiting part (6), the limiting part (6) is fixed on the inner side wall of the valve body (1), and is positioned between the deformable baffle (5) and the top end opening of the valve body (1).

2. A one-way valve according to claim 1, characterized in that the limit stop (6) comprises a plurality of stops (7) fixed on the inner side wall of the valve body (1), a plurality of said stops (7) abutting against the deformable flap (5).

3. A non-return valve according to claim 1, characterized in that the deformable flap (5) is of a plastically deformable metallic material.

4. A piston, characterized in that the piston comprises a piston body (8), a plurality of damping holes (9) are formed in the piston body (8), and a one-way valve as claimed in any one of claims 1-3 is fixed to one end of each damping hole (9); the mounting directions of the valve bodies (1) mounted on the two sides of the piston body (8) are opposite, and the mounting quantity of the valve bodies (1) on the two sides of the piston body (8) is equal.

5. A piston according to claim 4, wherein a plurality of said damping holes (9) are uniformly distributed in a ring shape on said piston body (8).

6. A piston according to claim 5, characterized in that a plurality of said valve bodies (1) on the same side of said piston body (8) are mounted at intervals on a plurality of said damping holes (9).

7. A piston according to claim 4, characterized in that the piston body (8) is provided with a connecting hole (10) in its central position.

8. A variable stiffness viscous damper comprising:

a cylinder body (11), wherein a partition plate (12) is fixed inside the cylinder body (11), the partition plate (12) divides the cylinder body (11) into a first sealing cavity (13) and a second sealing cavity (14), and the piston of any one of claims 4-7 is connected in the second sealing cavity (14) in a sliding manner; the second sealing cavity (14) is filled with viscous damping medium;

the piston rod (15) sequentially penetrates through the partition plate (12), the piston body (8) and the cylinder body (11), the piston rod (15) is fixedly connected with the piston body (8), and the piston rod (15) is in sealing sliding connection with the partition plate (12) and the cylinder body (11); the piston rod positioned in the first sealing cavity (13) is sleeved with a return spring (16), and two ends of the return spring (16) are fixedly connected between the end head of the piston rod (15) and the partition plate (12) respectively.

9. A variable stiffness viscous damper according to claim 8, characterized in that a head connecting ring (17) is fixed to the outer side wall of the first sealing chamber (13), and a tail connecting ring (18) is fixed to the end of the piston rod (15) remote from the first sealing chamber (13).

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