Viscous damper with overload protection function

Abstract

The utility model discloses a viscous damper with overload protection, which comprises a cylinder barrel, damping fluid is filled in the cylinder barrel, a piston rod is horizontally sleeved in the middle of the cylinder barrel in a sliding manner, a piston is sleeved on the piston rod, the piston is sleeved in the cylinder barrel in a sliding manner, a plurality of overload protection valve components are uniformly arranged on the piston, and the overload protection valve components are connected with the overload protection valve components in a sliding manner. The overload protection valve assembly comprises a barrel shell, and two main liquid holes are formed in the two ends of the barrel shell. Due to the fact that the overload protection valve assembly is arranged, when the pressure on any side of the piston exceeds a set value, the movable valve plate on the other side of the piston is pressed to move, a gap is formed between the two movable valve plates, a flow channel is formed between the first sub-liquid holes of the two movable valve plates, and damping liquid can circulate; the two movable valve plates make contact with each other under the action of the spring, the first sub liquid hole is closed, the overload protection effect is achieved, adjustment is automatically conducted according to pressure, an energy accumulator does not need to be arranged for monitoring pressure, and cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to building structure shock control technical field, concretely is a kind of viscous damper with overload protection. BACKGROUND

[0002] Viscous damper: according to the principle that fluid motion, especially when fluid passes through throttle hole will produce throttle resistance, is made, is a kind of damper related to piston movement speed. It is widely used in high-rise building, bridge, building structure seismic retrofit, industrial pipeline equipment seismic, military industry and other fields, since the seismic fortification intensity of each region is not the same, so in the design aspect of damper, different buildings are usually set with targeted parameters. To prevent the occurrence of seismic intensity higher than the damper setting grade, possibly damage damper or make damper disabled, usually increase safety margin in structure, the wall thickness of cylinder barrel, the diameter of piston rod will increase certain safety margin, directly lead to material increase, and indirectly lead to the processing cost of product, transportation cost etc. Different degrees of increase, or set the structure of overload protection, for example, the Chinese utility model patent with the authorization announcement No.CN222046484U discloses a kind of overload protection viscous damper. Including: cylinder body, fluid cavity and energy storage cavity are arranged in cylinder body, damping medium is arranged in fluid cavity, energy storage cavity is installed with energy accumulator;Piston, slidingly installed in fluid cavity and moving along the axial direction, piston separates to form first chamber and second chamber along the axial direction, clearance for the flow of damping medium is opened between piston and cylinder body;Piston rod, is arranged in fluid cavity, and is connected with piston, can drive piston to move linearly in fluid cavity, hole is opened in piston rod, which is connected with first chamber and second chamber;But this kind of overload protection structure has the following defects:

[0003] Adopt the way of energy accumulator monitoring cooperation safety valve pressure relief to carry out overload protection, but need to set energy accumulator, lead to cost increase, not conducive to popularization and use.

[0004] Therefore we propose a kind of viscous damper with overload protection to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of viscous damper with overload protection to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of viscous damper with overload protection, including cylinder barrel, the cylinder barrel is filled with damping liquid, the middle part of the cylinder barrel is slidably sleeved with piston rod, the piston rod is sleeved with piston, the piston is slidably sleeved in the cylinder barrel, a plurality of overload protection valve assemblies are evenly provided on the piston;

[0007] The overload protection valve assembly comprises a cylinder shell, two main liquid holes are formed at both ends of the cylinder shell, two fixed valve plates are fixedly sleeved at both ends of the cylinder shell, two guide rods are fixedly connected to the centers of the sides close to each other of the two fixed valve plates, two limiting plates are fixedly connected to the ends close to each other of the two guide rods, the two limiting plates are in contact with each other, two movable valve plates are slidably sleeved on the two guide rods, a plurality of first sub-liquid holes are uniformly and horizontally formed on each movable valve plate, and the positions of the first sub-liquid holes on the two movable valve plates are staggered with each other.

[0008] Preferably, a plurality of second sub-liquid holes are uniformly and horizontally formed on the fixed valve plate, a spring is sleeved on each guide rod, one end of the spring is fixedly connected to the side wall of the fixed valve plate, the other end of the spring is fixedly connected to the side wall of the movable valve plate, a sliding hole is horizontally formed in the center of the movable valve plate, the guide rod is slidably sleeved in the sliding hole, and a flared limiting hole is formed in the side of the movable valve plate close to the limiting plate.

[0009] Preferably, a plurality of cylinder cavities are uniformly and horizontally formed in the piston, the overload protection valve assembly is arranged in the cylinder cavity, a large liquid hole is formed in the side wall of the piston at one end of the cylinder cavity, and a mounting hole is formed in the side wall of the cylinder cavity at the other end of the cylinder cavity, the mounting hole and the large liquid hole are both communicated with the cylinder cavity, and the diameter of the large liquid hole is smaller than the diameter of the cylinder cavity.

[0010] Preferably, the cylinder shell is sleeved in the cylinder cavity, a fastener is fixedly connected in the mounting hole, the fastener contacts the end of the cylinder shell, and an inner hole is horizontally formed in the fastener.

[0011] Preferably, two sealing guide sleeves are fixedly sleeved at both ends of the cylinder barrel, the piston rod is slidably sleeved in the sealing guide sleeve, a metal bushing is fixedly connected to the inner side wall of the sealing guide sleeve, the metal bushing is slidably sleeved on the piston rod, and a sealing ring and an oil seal are fixedly embedded in the inner side wall of the sealing guide sleeve and are in interference fit with the piston rod.

[0012] Preferably, a tail cylinder seat is fixedly connected to one end of the cylinder barrel, a first ear seat is fixedly connected to the end of the tail cylinder seat away from the cylinder barrel, a first bearing is fixedly sleeved on the first ear seat, an end plate is fixedly connected to the end of the piston rod away from the tail cylinder seat, a second ear seat is fixedly connected to the side wall of the end plate, a second bearing is fixedly connected to the second ear seat, and a corrugated dust cover is fixedly connected between the end plate and the end of the cylinder barrel.

[0013] Compared with the prior art, the overload protection valve assembly has the following beneficial effects:

[0014] The utility model discloses set up overload protection valve subassembly, when the pressure of piston any one side exceeds the set value, the other side of dynamic valve piece will be pressed and move, and the clearance of two dynamic valve pieces is produced, and the flow passage is formed between the first sub liquid hole of two dynamic valve pieces, and the damping liquid can flow, when the pressure is less than the set value, two dynamic valve pieces are contacted under the action of spring, and the first sub liquid hole is closed, realizes the effect of overload protection, and automatic pressure adjustment is according to, need not set up energy accumulator monitoring pressure, reduced cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the main body structure schematic diagram of the first and second embodiments of the utility model;

[0016] Fig. 2 It is the main body cut structure schematic diagram of the first and second embodiments of the utility model;

[0017] Fig. 3 It is the cut structure schematic diagram of the overload protection valve subassembly of the first and second embodiments of the utility model.

[0018] In the drawing: 1, cylinder barrel;2, piston;3, overload protection valve subassembly;4, sealing guide sleeve;11, piston rod;12, tail cylinder seat;13, damping liquid;14, first ear seat;15, first bearing;16, end plate;17, second ear seat;18, second bearing;19, corrugated dust cover;21, cylinder cavity;22, big liquid hole;23, mounting hole;24, fastener;25, inner hole;31, cylinder shell;32, main liquid hole;33, fixed valve piece;34, guide rod;35, limit plate;36, dynamic valve piece;37, sliding hole;38, flared limit hole;39, first sub liquid hole;310, second sub liquid hole;311, spring;41, metal bushing;42, sealing ring;43, oil seal. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0020] Embodiment 1:

[0021] Please refer to Figs. 1-3The utility model provides a technical scheme: a viscous damper with overload protection, including cylinder 1, cylinder 1 is filled with damping liquid 13, the middle part horizontal sliding of cylinder 1 is equipped with piston rod 11, piston rod 11 is connected with piston 2, piston 2 is connected with the inside of cylinder 1, and piston 2 is evenly provided with multiple overload protection valve assemblies 3 on the upper portion,

[0022] Overload protection valve assembly 3 includes cylinder shell 31, two main liquid holes 32 are formed in the both ends of cylinder shell 31, two fixed valve sheets 33 are fixedly connected with the both ends of cylinder shell 31, two guide rods 34 are fixedly connected with the center of the side of two fixed valve sheets 33, two limit plates 35 are fixedly connected with the one end of two guide rods 34, two limit plates 35 contact each other, two movable valve sheets 36 are slidably connected with the two guide rods 34, multiple first sub liquid holes 39 are evenly formed in each movable valve sheet 36, the positions of the first sub liquid holes 39 on the two movable valve sheets 36 are staggered, the first sub liquid holes 39 are staggered, when the two movable valve sheets 36 contact each other, the first sub liquid holes 39 are closed, when the pressure on the side of piston 2 exceeds the set value, the movable valve sheet 36 on the other side is moved under the pressure, so that the two movable valve sheets 36 are separated, the flow channel is formed between the first sub liquid holes 39 of the two movable valve sheets 36, and the damping liquid 13 can flow, when the pressure is less than the set value, the two movable valve sheets 36 contact each other under the action of spring 311, the first sub liquid holes 39 are closed, the overload protection effect is realized, the pressure is automatically adjusted, the accumulator for monitoring the pressure is not needed, and the cost is reduced.

[0023] Embodiment 2

[0024] Please refer to Figs. 1-3 For the second embodiment of the utility model, based on the previous embodiment, multiple second sub liquid holes 310 are evenly formed in the fixed valve sheet 33, one spring 311 is connected with each guide rod 34, one end of the spring 311 is fixedly connected with the side wall of the fixed valve sheet 33, the other end of the spring 311 is fixedly connected with the side wall of the movable valve sheet 36, a sliding hole 37 is formed in the center of the movable valve sheet 36, the sliding hole 37 is slidably connected with the guide rod 34, and the flared limiting hole 38 is formed in the side of the movable valve sheet 36 close to the limit plate 35.

[0025] Multiple cylinder cavities 21 are evenly formed in the inside of the piston 2, the overload protection valve assembly 3 is arranged in the cylinder cavity 21, a large liquid hole 22 is formed in the side wall of the piston 2 at one end of the cylinder cavity 21, a mounting hole 23 is formed in the side wall of the piston 2 at the other end of the cylinder cavity 21, the mounting hole 23 and the large liquid hole 22 are both connected with the cylinder cavity 21, and the diameter of the large liquid hole 22 is smaller than the diameter of the cylinder cavity 21.

[0026] The cylinder shell 31 is connected with the cylinder cavity 21, the fastener 24 is fixedly connected with the mounting hole 23, the fastener 24 contacts the end of the cylinder shell 31, the inner hole 25 is formed in the fastener 24, and the fastener 24 is used for fixing the overload protection valve assembly 3.

[0027] The cylinder 1 is fixed with two sealing guide sleeves 4 at both ends, the piston rod 11 is slidably sleeved with the sealing guide sleeves 4, the inner wall of the sealing guide sleeve 4 is fixedly connected with a metal bushing 41, the metal bushing 41 is slidably sleeved with the piston rod 11, the inner wall of the sealing guide sleeve 4 is fixedly embedded with a sealing ring 42 and an oil seal 43, the sealing ring 42 and the oil seal 43 are in interference fit with the piston rod 11, and good sealing effect is provided.

[0028] The cylinder 1 is fixed with a tail cylinder seat 12 at one end, the tail cylinder seat 12 is fixed with a first ear seat 14 away from one end of the cylinder 1, the first ear seat 14 is fixedly sleeved with a first bearing 15, the piston rod 11 is fixed with an end plate 16 away from one end of the tail cylinder seat 12, the side wall of the end plate 16 is fixedly connected with a second ear seat 17, the second ear seat 17 is fixedly connected with a second bearing 18, and the end plate 16 is fixedly connected with a corrugated dust cover 19 between the end plate 16 and the end of the cylinder 1.

[0029] Embodiment 3:

[0030] Please refer to Figs. 1-3 For the third embodiment of the utility model, the utility model sets up an overload protection valve assembly 3 based on the above two embodiments, when the pressure on any one side of the piston 2 exceeds the set value, the other side of the movable valve plate 36 will be pressed to move, so that the two movable valve plates 36 generate a gap, a flow passage is formed between the first sub-liquid holes 39 of the two movable valve plates 36, and the damping liquid 13 can flow, when the pressure is less than the set value, the two movable valve plates 36 are in contact under the action of the spring 311, the first sub-liquid holes 39 are closed, the effect of overload protection is realized, and automatic adjustment according to pressure is realized, without the need to set an accumulator to monitor pressure, and the cost is reduced.

[0031] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A viscous damper with overload protection, comprising a cylinder (1) filled with damping fluid (13), characterized in that: A piston rod (11) is horizontally slidably sleeved in the middle of the cylinder (1), and a piston (2) is sleeved on the piston rod (11). The piston (2) is slidably sleeved inside the cylinder (1), and multiple overload protection valve assemblies (3) are evenly arranged on the piston (2). The overload protection valve assembly (3) includes a cylindrical shell (31), with two main liquid holes (32) at both ends of the cylindrical shell (31). Two fixed valve plates (33) are fixedly sleeved at both ends of the cylindrical shell (31). Two guide rods (34) are horizontally fixed to the center of one side of the two fixed valve plates (33). Two limiting plates (35) are fixed to one end of the two guide rods (34) and are in contact with each other. Two moving valve plates (36) are horizontally slidably sleeved on the two guide rods (34). Multiple first sub-liquid holes (39) are evenly and horizontally opened on each moving valve plate (36). The positions of the first sub-liquid holes (39) on the two moving valve plates (36) are staggered.

2. A viscous damper with overload protection according to claim 1, characterized in that: Multiple second sub-liquid holes (310) are uniformly and horizontally opened on the fixed valve plate (33). A spring (311) is sleeved on each guide rod (34). One end of the spring (311) is fixed to the side wall of the fixed valve plate (33), and the other end of the spring (311) is fixed to the side wall of the moving valve plate (36). A sliding hole (37) is opened horizontally in the center of the moving valve plate (36). The sliding hole (37) is slidably sleeved on the guide rod (34). An flared limiting hole (38) is opened on the side of the moving valve plate (36) near the limiting plate (35).

3. A viscous damper with overload protection according to claim 1, characterized in that: The piston (2) has multiple cylindrical cavities (21) evenly and horizontally opened inside. The overload protection valve assembly (3) is set inside the cylindrical cavity (21). A large liquid hole (22) is opened on the side wall of the piston (2) at one end of the cylindrical cavity (21). An installation hole (23) is opened on the side wall of the cylindrical cavity (21) at the other end of the cylindrical cavity (21). The installation hole (23) and the large liquid hole (22) are both connected to the cylindrical cavity (21). The diameter of the large liquid hole (22) is smaller than the diameter of the cylindrical cavity (21).

4. A viscous damper with overload protection according to claim 3, characterized in that: The cylindrical shell (31) is fitted inside the cylindrical cavity (21), and a fastener (24) is fixedly connected in the mounting hole (23). The fastener (24) contacts the end of the cylindrical shell (31), and an inner hole (25) is horizontally opened on the fastener (24).

5. A viscous damper with overload protection according to claim 1, characterized in that: Two sealing guide sleeves (4) are fixedly sleeved at both ends of the cylinder (1). The piston rod (11) is slidably sleeved on the sealing guide sleeve (4). A metal bushing (41) is fixedly connected to the inner wall of the sealing guide sleeve (4). The metal bushing (41) is slidably sleeved on the piston rod (11). A sealing ring (42) and an oil seal (43) are fixedly embedded in the inner wall of the sealing guide sleeve (4). The sealing ring (42) and the oil seal (43) are interference fit with the piston rod (11).

6. A viscous damper with overload protection according to claim 1, characterized in that: One end of the cylinder (1) is fixed to the tail cylinder seat (12), and the end of the tail cylinder seat (12) away from the cylinder (1) is fixed to the first ear seat (14). The first ear seat (14) is fixedly sleeved with the first bearing (15). The end of the piston rod (11) away from the tail cylinder seat (12) is fixed to the end plate (16). The side wall of the end plate (16) is fixed to the second ear seat (17). The second ear seat (17) is fixed to the second bearing (18). The end plate (16) and the end of the cylinder (1) are fixedly connected to the corrugated dust cover (19).

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