CN221278351U - Buffer device for hydraulic system and hydraulic system - Google Patents

Abstract

The application relates to a damping device for a hydraulic system and a hydraulic system, comprising: the support is of a hollow structure, and a top plate and a bottom plate of the support are provided with vertically aligned through holes; the upper hinge is of a columnar structure, a baffle plate is arranged in the middle of the upper hinge, the upper hinge is arranged in the through hole and can reciprocate up and down along the through hole, and the upper end of the upper hinge extends out of the support to hinge a hydraulic cylinder of the hydraulic system; the elastic buffer piece is filled between the stop plate of the upper hinge and the top plate of the support; and the lower hinge is fixedly arranged on the bottom plate of the support to hinge the fixed point of the frame. The buffer device can relieve the impact force received by the hydraulic cylinder when the hydraulic cylinder of the hydraulic system is stretched and suddenly stopped, so that the oil leakage caused by the damage of the sealing of the hydraulic cylinder is avoided, and the service life and the safety of equipment are improved.

Description

Buffer device for hydraulic system and hydraulic system

Technical Field

The application relates to the technical field of hydraulic systems of heat treatment processes, in particular to a buffer device for a hydraulic system and the hydraulic system.

Background

In the heat treatment process, the temperature and time control for workpiece processing are very harsh, and a heat treatment furnace and a quenching tank are required to adopt a layout mode which is more beneficial to time control for heat treatment transfer of large workpieces. For example, chinese patent 201911149223.3 discloses a quenching production line for sheet metal, which comprises a feeding conveying mechanism, a roller-hearth continuous heating furnace, a quenching cooling device and a discharging conveying mechanism, which are sequentially arranged, and can realize continuous quenching of sheet metal workpieces by transportation, thereby improving quenching efficiency.

However, not all workpieces can be subjected to one-time heat treatment and quenching forming, and some large workpieces need to be subjected to repeated heat treatment and quenching, so that the current layout mode is that a heat treatment furnace is arranged above, a quenching tank is arranged right below the heat treatment furnace, a furnace door is arranged on the lower part of the heat treatment furnace, and the workpieces are subjected to station switching between the heat treatment furnace and the quenching tank through a hanging basket and a lifting device, so that the heat treatment and quenching switching is realized rapidly. Because the transfer time requirement on the process is short, the lifting device adopts a hydraulic system to control the time so as to achieve the purpose of rapid switching. However, when the workpiece and the hanging basket are rapidly lowered together, for example, the workpiece and the hanging basket are rapidly stopped at a distance of 10 meters, the pressure of the hydraulic system is too high, the sealing of the hydraulic cylinder is easily damaged, oil leakage is caused, the hydraulic system is seriously disabled, and the heat treatment process cannot be completed.

Disclosure of utility model

The application provides a buffer device for a hydraulic system and the hydraulic system, and aims to solve the problem that in the prior art, the hydraulic system rapidly switches work stations between a heat treatment furnace and a quenching tank, and oil leakage is easily caused by damage to a hydraulic cylinder seal due to overlarge pressure caused by rapid stopping.

According to the present application, there is provided a buffer device for a hydraulic system installed between a heat treatment furnace and a quenching bath for lifting a heat-treated workpiece, the buffer device comprising:

The support is of a hollow structure, and a top plate and a bottom plate of the support are provided with vertically aligned through holes;

The upper hinge is of a columnar structure, a baffle plate is arranged in the middle of the upper hinge, the upper hinge is arranged in the through hole and can reciprocate up and down along the through hole, and the upper end of the upper hinge extends out of the support to hinge a hydraulic cylinder of the hydraulic system;

The elastic buffer piece is filled between the stop plate of the upper hinge and the top plate of the support;

and the lower hinge is fixedly arranged on the bottom plate of the support to hinge the fixed point of the frame.

In some embodiments, the resilient cushioning element is a cushioning spring;

The buffer springs are arranged in a plurality of positioning columns, the positioning columns are symmetrically distributed relative to the upper hinge, and the buffer springs are respectively sleeved on the positioning columns;

or the buffer springs are arranged singly, and the single buffer spring is sleeved on the columnar part of the upper hinge and is positioned above the stop plate.

In some embodiments, an upper guide sleeve is disposed at the top plate through hole of the support, a lower guide sleeve is disposed at the bottom plate through hole of the support, and the upper hinge passes through the upper guide sleeve and the lower guide sleeve, respectively.

In some embodiments, a stopper for limiting the movement of the upper hinge stopper is provided in the support, and the stopper is distributed on the top plate and/or the bottom plate of the support.

In some embodiments, the stopper is a continuous annular structure, disposed around the upper hinge; or the limiting blocks comprise a plurality of spaced blocks, and the plurality of limiting blocks are uniformly arranged around the upper hinge.

In some embodiments, the cross-section of the support is square, and the elastic cushioning members are uniformly arranged along one or both sets of opposite sides of the square; or the cross section of the support is in a circular shape, and the elastic buffering pieces are uniformly arranged along the circumferential direction of the circular shape.

In some embodiments, the lower hinge is provided in two, symmetrically mounted on both sides of the bottom plate of the stand.

In some embodiments, the cushioning device further comprises: the connecting plate can be connected with a plurality of upper hinges or a plurality of lower hinges so as to combine and install the buffer structures formed by the plurality of groups of supports, the upper hinges, the elastic buffer pieces and the lower hinges.

According to another aspect of the present application, there is provided a hydraulic system for lifting a heat treated workpiece between a heat treatment furnace and a quenching bath, comprising a hydraulic cylinder, a buffer device for the hydraulic system being installed between the hydraulic cylinder of the hydraulic system and a frame fixing point as described above.

In some embodiments, the hydraulic system further comprises: the pulley block and the traction rope are connected with a piston at the upper end of the hydraulic cylinder, and the traction rope is connected with a hanging basket for containing the heat treatment workpiece after passing through the pulley block.

The buffering device comprises the support, the upper hinge, the elastic buffering piece and the lower hinge, wherein the upper hinge is arranged in the through hole of the support and can reciprocate up and down, the elastic buffering piece is arranged between the middle baffle plate of the upper hinge and the top plate of the support, and the impact force applied to the hydraulic cylinder can be relieved when the hydraulic cylinder of the hydraulic system is stretched and suddenly stopped, so that the oil leakage caused by the damage of the sealing of the hydraulic cylinder is avoided, and the service life and the safety of equipment are improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic cross-sectional structure of a buffering device for a hydraulic system according to embodiment 1 of the present application;

FIG. 2 is a schematic view showing a cross-sectional structure at another angle of embodiment 1 of the present application;

FIG. 3 is a schematic top view of embodiment 1 of the present application;

fig. 4 is a schematic top view showing a buffer device for a hydraulic system according to embodiment 2 of the present application;

Fig. 5 is a schematic top view showing a structure of a buffering device for a hydraulic system according to embodiment 3 of the present application;

FIG. 6 is a schematic view showing the construction of a hydraulic system according to embodiment 4 of the present application;

Wherein the above figures include the following reference numerals:

1. An upper hinge; 2. a support; 3. an elastic buffer member; 4. a lower hinge; 5. a lower guide sleeve; 6. an upper guide sleeve; 7. positioning columns; 8. a limiting block; 9. a hydraulic cylinder; 10. a traction rope; 11. pulley block; 12. a hanging basket; 13. the frame fixing point.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be oriented 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be capable of being practiced otherwise than as specifically illustrated and described. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1 to 3 show an exemplary embodiment 1 of a damping device for a hydraulic system according to the application. As shown in fig. 1 to 3, a buffer device for a hydraulic system is provided, in which the hydraulic system is installed between a heat treatment furnace and a quenching bath to raise and lower a heat-treated workpiece, and the hydraulic system is structured as shown in embodiment 4 of fig. 6. The damping device for a hydraulic system according to the application comprises:

the support 2, support 2 are hollow structure, and the roof and the bottom plate of support 2 are provided with the through-hole of vertical alignment.

The upper hinge 1, the upper hinge 1 is columnar structure, the middle part is equipped with the stop plate, and upper hinge 1 sets up in the through-hole and can follow the up-and-down reciprocating motion of through-hole, and the upper end of upper hinge 1 stretches out support 2 in order to articulated hydraulic system's pneumatic cylinder 9.

And the elastic buffer piece 3, wherein the elastic buffer piece 3 is filled between the stop plate of the upper hinge 1 and the top plate of the support 2.

The lower hinge 4, the lower hinge 4 is fixedly installed on the bottom plate of the support 2 to hinge the frame fixing point 13.

Based on the above structure, the buffering device of the present embodiment can be connected between the hydraulic cylinder 9 and the frame fixing point 13 to buffer the impact force received by the hydraulic system. When the hydraulic cylinder 9 controls the hanging basket 12 to rapidly descend and stretch and suddenly stop, the upper hinge 1 is subjected to upward tension, so that the upward movement trend is achieved, the stop plate of the upper hinge 1 presses the elastic buffer member 3, the elastic buffer member 3 transmits force to the support 2, and the elastic buffer member 3 is compressed to relieve impact, so that the impact force originally received by the hydraulic cylinder 9 can be reduced, oil leakage caused by damage of sealing of the hydraulic cylinder 9 is avoided, and the service life and safety of equipment are improved. Compared with a high-cost buffer device made of structures such as an overflow valve and an energy accumulator, the buffer device provided by the application utilizes a mechanical structure for buffering, and has the advantages of low cost and obvious effect.

In some embodiments of the present application, as in embodiments 1 to 3, the elastic buffer 3 is a buffer spring. The number, size and pre-compression amount of the buffer springs can be calculated and selected according to the installation position and the impact force.

In the embodiment 1 shown in fig. 1 to 3, a plurality of buffer springs are provided to form a spring group, a plurality of positioning columns 7 are provided in the support 2, the positioning columns 7 are symmetrically distributed relative to the upper hinge 1, and the buffer springs are respectively sleeved on the positioning columns 7 so as to uniformly stress the stop plates of the upper hinge 1.

Or in the embodiment 3 shown in fig. 5, the buffer spring is arranged in a single way, the wire diameter of the single buffer spring needs to be designed to be thicker, and the single buffer spring can be sleeved on the columnar part of the upper hinge 1 and positioned above the stop plate, so that the positioning column 7 is not needed.

In some embodiments of the present application, as shown in embodiment 1 of fig. 1 to 3, an upper guide sleeve 6 is provided at a top plate through hole of the stand 2, a lower guide sleeve 5 is provided at a bottom plate through hole of the stand 2, and the upper hinge 1 is provided through the upper guide sleeve 6 and the lower guide sleeve 5, respectively. By installing the upper guide sleeve 6 and the lower guide sleeve 5, accurate guide can be provided for the reciprocating motion of the upper hinge 1, the shaking of the upper hinge 1 in the motion process is avoided, and the operation precision and stability of the hydraulic system are improved.

In some embodiments of the application, a stopper 8 for limiting the movement of the stop plate of the upper hinge 1 is also provided in the support 2. As shown in fig. 1 to 3 in embodiment 1, the limiting blocks 8 are distributed on the bottom plate of the support 2, so as to limit the lower limit of the movement of the stop plate, and prevent the stop plate from striking the lower guide sleeve 5 to cause the lower guide sleeve 5 to be separated. In addition, in other embodiments of the present application, the limiting blocks 8 may be disposed on the top plate of the support 2, so as to avoid the excessive compression of the buffer spring by the baffle plate or the falling out of the upper guide sleeve 6 caused by the impact of the upper guide sleeve 6.

In some embodiments of the present application, the limiting block 8 may be configured as a continuous ring structure, i.e. an integral ring structure, and is disposed around the upper hinge 1; alternatively, the stoppers 8 may include a plurality of stoppers disposed at intervals, and the plurality of stoppers 8 are disposed uniformly around the upper hinge 1.

In some embodiments of the present application, as in embodiment 1 shown in fig. 1 to 3, the cross section of the holder 2 is a circular shape, and the elastic cushion 3, i.e., the cushion springs, are uniformly arranged along the circumference of the circular shape.

Or as shown in fig. 4 for example 2, the cross section of the support 2 is square, and the elastic buffer 3 is uniformly arranged along one or both sets of opposite sides of the square.

In some embodiments of the present application, as in embodiment 1 shown in fig. 1 to 3, the lower hinge 4 is provided with two, symmetrically installed at both sides of the bottom plate of the stand 2 to firmly hinge the frame fixing point 13.

In some embodiments of the application, the cushioning device further comprises: and the connecting plate can be used for connecting the plurality of upper hinges 1 or the plurality of lower hinges 4 so as to combine and install the buffer structures formed by the plurality of groups of supports 2, the upper hinges 1, the elastic buffer pieces 3 and the lower hinges 4.

That is, the buffer structure formed by the support 2, the upper hinge 1, the elastic buffer member 3 and the lower hinge 4 according to the embodiment of the present application may be manufactured as an independent buffer unit, and the buffer unit may be used alone or in combination to form a buffer group, so as to achieve the shock absorption of a larger impact force. In order to realize the joint use of a plurality of buffer monomers, the connecting plate can be utilized, one surface of the connecting plate can be used in pairs, a plurality of smaller hinges are arranged on one surface of the connecting plate so as to be connected with the upper hinge 1 or the lower hinge 4 of each buffer monomer, and a larger hinge meeting the strength requirement is arranged on the other surface of the connecting plate so as to be connected with a hydraulic system needing buffering.

The application also discloses a hydraulic system, as shown in embodiment 4 of fig. 6, which is installed between the heat treatment furnace and the quenching tank and is used for lifting and lowering the heat treatment workpiece so as to switch the heat treatment process and the quenching process of the heat treatment workpiece. The hydraulic system comprises a hydraulic cylinder 9, and a buffer device for the hydraulic system of each embodiment is arranged between the hydraulic cylinder 9 and a frame fixing point 13.

In some embodiments of the application, the hydraulic system further comprises: the pulley block 11 and the traction rope 10, the traction rope 10 is connected with a piston at the upper end of the hydraulic cylinder 9, and a hanging basket 12 for containing the heat treatment workpiece is connected after the traction rope passes through the pulley block 11.

The working principle of the hydraulic system is as follows: when the hydraulic cylinder 9 rapidly stretches, namely the heat treatment workpiece and the hanging basket 12 rapidly drop into the quenching tank and rapidly stop after entering the quenching tank, the upper hinge 1 receives upward pulling impact force, the upper hinge 1 compresses the elastic buffer member 3, the support 2 reversely supports the elastic buffer member 3, and the elastic buffer member 3 is compressed to enable the impact force to be absorbed; after the heat treatment workpiece and the hanging basket 12 stop moving, the compressed elastic buffer member 3 restores the elastic force before impact, so as to play a role in buffering, at the moment, the impact in the hydraulic system is reduced, and the hydraulic cylinder 9 is not damaged easily.

When the heat treated workpiece and basket 12 need to be lifted into the heat treatment furnace, the buffer only acts as a load bearing, as the process speed does not need to be very fast.

In summary, the damping device of the present embodiment may be connected between the hydraulic cylinder 9 and the frame fixing point 13 to damp the impact force applied to the hydraulic system. When the hydraulic cylinder 9 controls the hanging basket 12 to rapidly descend and stretch and suddenly stop, the upper hinge 1 is subjected to upward pulling force, so that the upward movement trend is achieved, the stop plate of the upper hinge 1 presses the elastic buffer member 3, the elastic buffer member 3 transmits the force to the support 2, and the elastic buffer member 3 is compressed to relieve the impact, so that the impact force originally received by the hydraulic cylinder 9 can be reduced, the oil leakage caused by the damage of the sealing of the hydraulic cylinder 9 is avoided, and the service life and safety of equipment are improved. Compared with a high-cost buffer device made of structures such as an overflow valve and an energy accumulator, the buffer device provided by the application utilizes a mechanical structure for buffering, and has the advantages of low cost and obvious effect.

The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A buffer device for a hydraulic system installed between a heat treatment furnace and a quenching bath for lifting a heat-treated workpiece, the buffer device comprising:

the support (2) is of a hollow structure, and vertically aligned through holes are formed in the top plate and the bottom plate of the support (2);

The upper hinge (1) is of a columnar structure, a baffle plate is arranged in the middle of the upper hinge (1), the upper hinge (1) is arranged in the through hole and can reciprocate up and down along the through hole, and the upper end of the upper hinge (1) extends out of the support (2) to hinge a hydraulic cylinder (9) of the hydraulic system;

An elastic buffer (3), wherein the elastic buffer (3) is filled between a stop plate of the upper hinge (1) and a top plate of the support (2);

The lower hinge (4) is fixedly arranged on the bottom plate of the support (2) so as to be hinged with a frame fixing point (13).

2. Damping device for a hydraulic system according to claim 1, characterized in that the elastic damping element (3) is a damping spring;

The buffer springs are arranged in a plurality, a plurality of positioning columns (7) are arranged in the support (2), the positioning columns (7) are symmetrically distributed relative to the upper hinge (1), and the buffer springs are respectively sleeved on the positioning columns (7);

Or the buffer springs are arranged singly, and the single buffer spring is sleeved on the columnar part of the upper hinge (1) and is positioned above the stop plate.

3. Buffer device for a hydraulic system according to claim 2, characterized in that an upper guide sleeve (6) is provided at the top plate through hole of the support (2), a lower guide sleeve (5) is provided at the bottom plate through hole of the support (2), the upper hinge (1) passing through the upper guide sleeve (6) and the lower guide sleeve (5), respectively.

4. Buffer device for a hydraulic system according to claim 2, characterized in that the support (2) is provided with stop blocks (8) for limiting the movement of the stop plate of the upper hinge (1), which stop blocks (8) are distributed on the top and/or bottom plate of the support (2).

5. Buffer for a hydraulic system according to claim 4, characterized in that the stop block (8) is of continuous annular structure, arranged around the upper hinge (1); or the limiting block (8) comprises a plurality of spaced limiting blocks, and the limiting blocks (8) are uniformly arranged around the upper hinge (1).

6. The damping device for a hydraulic system according to claim 1, characterized in that the cross section of the support (2) is square-shaped, the elastic damping elements (3) being arranged uniformly along one or both sets of opposite sides of the square shape; or the cross section of the support (2) is in a circular shape, and the elastic buffer pieces (3) are uniformly arranged along the circumferential direction of the circular shape.

7. Buffer device for hydraulic systems according to claim 1, characterized in that the lower hinge (4) is provided with two symmetrically mounted on both sides of the bottom plate of the support (2).

8. The buffering device for a hydraulic system according to claim 1, characterized in that the buffering device further comprises: the connecting plate can be connected with a plurality of upper hinges (1) or a plurality of lower hinges (4) so as to combine and install a plurality of groups of buffer structures formed by the support (2), the upper hinges (1), the elastic buffer pieces (3) and the lower hinges (4).

9. Hydraulic system for lifting heat treated workpieces between a heat treatment furnace and a quenching tank, comprising a hydraulic cylinder (9), characterized in that a buffer device for a hydraulic system according to any one of claims 1 to 7 is installed between the hydraulic cylinder (9) of the hydraulic system and a frame fixing point (13).

10. The hydraulic system of claim 9, further comprising: the device comprises a pulley block (11) and a traction rope (10), wherein the traction rope (10) is connected with a piston at the upper end of the hydraulic cylinder (9), and is connected with a hanging basket (12) for containing a heat treatment workpiece after passing through the pulley block (11).