CN109798323A - A kind of support device and storage system - Google Patents
A kind of support device and storage system Download PDFInfo
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- CN109798323A CN109798323A CN201910221868.7A CN201910221868A CN109798323A CN 109798323 A CN109798323 A CN 109798323A CN 201910221868 A CN201910221868 A CN 201910221868A CN 109798323 A CN109798323 A CN 109798323A
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Abstract
The present invention discloses a kind of support device comprising support rod, sleeve and buffer gear, one end of the sleeve are provided with opening；One end of the support rod is set in the sleeve, and the other end is stretched out from the open end of the sleeve；The buffer gear is set in the sleeve, including the first buffer cell and the second buffer cell, first buffer cell and second buffer cell act on the support rod, and it is zero that the support rod keeps suffered resultant force under the action of the first buffer cell and second buffer cell.Correspondingly, invention additionally discloses a kind of storage systems comprising the support device.Support device of the present invention itself does not generate any initial external force, and has antidetonation, damping effect, and flexible arrangement is applied widely.
Description
Technical field
The invention belongs to field of engineering technology, and in particular to a kind of support device and storage system.
Background technique
The antidetonation and vibration damping problem of job facilities are extremely important, especially currently, with the raising to safety requirements, it is desirable that
Nuclear power generating equipment or facility are improved to meet tightened up antidetonation and vibration damping safety requirements.Currently, being rung over the ground to reduce
It answers, these equipment or facility are typically all to use resilient supporting unit, to play antidetonation, effectiveness in vibration suppression.
In Chinese patent CN201510072558.5 (notification number CN104653697A, publication date 2015-05-27)
A kind of resilient supporting unit of bunkering screen work is disclosed, fuel screen work when can be reduced the influence of earthquake, and can guarantee earthquake
Stress is smaller, avoids collision, and can be widely used for screen work surrounding, is effectively protected frame structure.Although this resilient supporting unit
Can be with vibration damping, but fuel screen work is subjected to support device itself bring added force after mounting, therefore for single
Fuel screen work, which need to be arranged symmetrically support, just can guarantee stress balance；For multiple fuel screen works, connected between screen work with rigid support
It connects, the vibration reduction support connecting with side wall will be also arranged symmetrically, and just can guarantee whole stress balance；It is also needed in earthquake symmetrical
Arrangement could lean on spring and fluid damping to reduce the external load function in two opposite directions, constrain it and be maintained at equilbrium position.
However, when needing fuel screen work single-sided arrangement, to constrain it and be maintained at equilbrium position can become abnormal difficult.
Currently, this lateral support device for buffering, there is also following deficiencies:
(1) support device itself has added force to material screen work, needs to be arranged symmetrically, and is not suitable for single-sided arrangement；
(2) even being arranged symmetrically, whole stress balance, but part also will be made lattice by starting force at Frame Supports
Frame increases local pressure.The presence of this starting force is superimposed in earthquake with seismic (seismal, will be generated more to storage screen work
Detrimental effect.
Summary of the invention
The technical problem to be solved by the present invention is to for of the existing technology above insufficient, provide it is a kind of have antidetonation,
Damping effect, and the support device of initial external force and the storage system comprising the support device itself are not generated.
According to an aspect of the present invention, a kind of support device, technical solution are provided are as follows:
A kind of support device, including support rod, sleeve and buffer gear, one end of the sleeve are provided with opening；Institute
The one end for stating support rod is set in the sleeve, and the other end is stretched out from the open end of the sleeve；The buffer gear
It is set in the sleeve, including the first buffer cell and the second buffer cell, first buffer cell and described second delays
It rushes unit to act on the support rod, and the support rod is in first buffer cell and second buffer cell
The suffered resultant force of the lower holding of effect is zero.
Preferably, first buffer cell includes the first compressed spring, and second buffer cell includes the second compression
Spring, the support rod be in one end in the sleeve be piston end, the piston end by sleeve be divided into first chamber and
Second chamber, first compressed spring and second compressed spring are respectively arranged at the first chamber and second chamber
It is indoor；First compressed spring and second compressed spring are equal to the active force of the support rod, contrary.
Preferably, the support device further includes baffle and nut, and the baffle is set on the open end of the sleeve,
It is screw rod end that the support rod, which is in the other end outside sleeve, and the nut can be sleeved on the screw rod end；
First compressed spring is sleeved on the support rod, the both ends of the first compressed spring respectively with the baffle and
The piston end of the support rod offsets；
The both ends of second compressed spring offset with the support rod and the sleeve respectively.
Preferably, it is provided with first through hole in the first chamber, the second through-hole is provided in the second chamber.
Preferably, it is provided with the pin hole for being inserted into pin on the piston end of the support rod, is provided on the sleeve
Through-hole corresponding with the pin hole.
It preferably, further include pedestal, the pedestal has a spherical recess portion, opposite with its open end one on the sleeve
The shape at end is spherical shape compatible with the recess portion, and the spheric end of the sleeve is set in the recess portion.
It preferably, further include fixing piece, the fixing piece is set on the pedestal, for preventing the spheric end of the sleeve
It is detached from from the recess portion of the pedestal.
Preferably, the fixing piece includes fixed ring and bolt, and the fixed ring is sleeved on the spheric end of the sleeve
On；The bolt, for being connected and fixed ring and pedestal.
According to another aspect of the present invention, a kind of storage system is also provided, including be set to storage between screen work and with
The support device, the support device between the storage between the screen work, for buffering suffered external force,
Resilient support is provided to the screen work.
Preferably, the quantity of the support device is multiple, and multiple support devices are distributed between the storage and institute
It states between screen work.
Support device provided by the invention, its own will not generate any initial external force, it is thus possible to which flexible arrangement is needing
The various places buffered, position is unrestricted, to improve the scope of application of support device.
Storage system provided by the invention, between being arranged support device between screen work and storage, due to its installation
Not generating initial external force afterwards, flexible arrangement may be mounted at unilateral side, bilateral or surrounding of screen work etc., and can be arranged symmetrically,
It can also make that the arrangement for storing screen work is more convenient, adaptation range is wider with unsymmetrical arrangement.When an earthquake occurs, it is filled by support
The buffer gear set plays the role of buffering, vibration damping, enhances the shock resistance of screen work；It, can be with since one end of sleeve is spherical shape
Make screen work in run-off the straight, from Moment, to further improve support device to screen work protective capability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the support device in the embodiment of the present invention 1 in erection stage；
Fig. 2 is the structural schematic diagram of the support device in the embodiment of the present invention 1 when in use；
Fig. 3 is a kind of structural schematic diagram of storage system in the embodiment of the present invention 2 (support device is arranged in screen work unilateral side)；
Fig. 4 is that (it is double that support device is arranged in screen work for the structural schematic diagram of another storage system in the embodiment of the present invention 2
Side)；
Fig. 5 is that (support device is arranged in screen work three for the structural schematic diagram of another storage system in the embodiment of the present invention 2
Side)；
Fig. 6 is that (support device is arranged symmetrically in screen work for the structural schematic diagram of another storage system in the embodiment of the present invention 2
Surrounding)；
Fig. 7 is that (support device unsymmetrical arrangement is in lattice for the structural schematic diagram of another storage system in the embodiment of the present invention 2
Frame surrounding).
In figure: 1- support rod；2- piston end；21- piston crown；22- piston tail；3- baffle；4- pin；5- sleeve；
6- nut；The first compressed spring of 7-；The second compressed spring of 8-；9- pedestal；10- screen work side plate；11- first through hole；12- second is logical
Hole；13- pin hole；14- fixed ring；15- third through-hole；Side wall between 16- storage；17- first chamber；18- second chamber；19- spiral shell
Bolt, 20- support device.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, below in conjunction with attached in the present invention
Figure, carries out clear, complete description to the technical solution in the present invention, it is clear that described embodiment is one of the invention
Point embodiment, rather than whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making wound
All other embodiment obtained under the premise of the property made is worked, belongs to protection scope of the present invention.
For in the prior art, support device can generate initial external force to the facility supported, need to be arranged symmetrically ability
The problems such as keeping whole stress balance, the present invention provides a kind of support device, including support rod, sleeve and buffer gear,
One end of the sleeve is provided with opening；One end of the support rod is set in the sleeve, and the other end is from the sleeve
Open end in stretch out；The buffer gear is set in the sleeve, including the first buffer cell and the second buffer cell, institute
It states the first buffer cell and second buffer cell acts on the support rod, and the support rod is slow described first
The suffered resultant force of holding is zero under the action of rushing unit and second buffer cell.
Correspondingly, the problems such as being arranged symmetrically support device is needed in order to solve storage screen work, the present invention also provides a kind of storages
Deposit system, including the screen work being set between storage and above-described support device, the support device is set between the storage
Between the screen work.
Embodiment 1
The present embodiment discloses a kind of support device, can be applied to laterally prop up fuel for nuclear power plant storage screen work
Support, naturally it is also possible to for the support to other facilities for needing antidetonation or vibration damping.The present embodiment is to be set between bunkering
It is described in detail for the bunkering screen work (hereinafter referred to as screen work) of (between hereinafter referred to as storing), is changed by the support device
Kind stress of the screen work in normal or earthquake, to improve the shock resistance of screen work.
As shown in Figure 1 and Figure 2, the support device in the present embodiment mainly includes support rod 1, sleeve 5 and buffer gear,
Wherein: one end of sleeve 5 is provided with opening；One end of support rod 1 is set in sleeve 5, and the other end is from the open end of sleeve 5
Middle stretching；Buffer gear is set in sleeve 5, including the first buffer cell and the second buffer cell, the first buffer cell and
Two buffer cells act on support rod 1, and support rod 1 is kept under the action of the first buffer cell and the second buffer cell
Suffered resultant force is zero.
Specifically, one end of sleeve 5 is provided with opening, referred to as open end, one end of support rod 1 can be from the open end of sleeve
It extending into 5 internal cavities of sleeve, referred to as piston end 2, the piston end 2 of support rod 1 includes piston crown 21 and piston tail 22,
It is T shape along the section of the axial direction of support rod 1, and the size of piston crown 21 and the inner wall size of sleeve 5 are adapted, piston
End 2 can move left and right in sleeve 5；The other end of support rod 1 is in outside the open end of sleeve 5, and can pass through bolt
The modes such as connection, riveting, clamping, welding are fixed on support zone, for example support zone can be screen work side plate 10, this implementation
Example is preferably bolted, i.e., support device further includes nut 6, and it is screw rod end, support that support rod 1, which is in the other end outside sleeve,
After the screw rod end of bar 1 passes through screen work side plate 10, a nut 6 is respectively arranged on the support rod of the two sides of screen work side plate 10,
Support rod and screen work side plate 10 are attached fixation by nut 6, this connection type can conveniently adjust support device and be
Suitable length.
Baffle 3 is provided on the open end of the support rod, the middle part of baffle 3 is provided with through-hole, and the ruler of the through-hole
The very little outer diameter with piston tail 22 is adapted, so that the piston end of support rod 1 passes through the through-hole on baffle 3, and can be hindered
Gear piston crown 21 is detached from from sleeve 5.The internal cavities of sleeve 5 are divided into two chambers, i.e. the first chamber by piston crown 21
Room 17 and second chamber 18 are provided with the first buffer cell in first chamber 17, the second buffer cell are provided in second chamber.
Further, the first buffer cell includes the first compressed spring 7, and the second buffer cell includes the second compressed spring 8.
First compressed spring 7 is sleeved in the piston tail 22 of the piston end 2 of support rod 1, in which: one end of the first compressed spring 7 with
Baffle 3 offsets, and baffle 3 can prevent the first compressed spring 7 from deviating from out of sleeve 5；The piston end 2 of its other end and support rod 1
It offsets, is offseted with piston crown 21.One end of second compressed spring 8 offsets with support rod 1, be exactly with
The piston crown 21 of the piston end 2 of support rod 1 offsets, and the other end offsets with sleeve 5, be exactly with 5 bottom end of sleeve (i.e.
One end opposite to the open end) it offsets.
In the present embodiment, the first compressed spring 7 and the second compressed spring 8 are preferably that coefficient of elasticity is identical, and length is identical
Two compressed springs.By carrying out the compression of equal length to the first compressed spring 7 and the second compressed spring 8, make the first compression
Spring 7 and the second compressed spring 8 are identical to the active force of support rod, contrary, and such support rod 1 is in stress balance shape
State.When by external applied load (when such as earthquake), by the effect of the first compressed spring and the second compressed spring, buffer gear can be with
Play the role of buffering, vibration damping, so that storage screen work be protected not to be destroyed.
Further, first through hole 11 and second are respectively arranged in the first chamber 17 and second chamber 18 on sleeve 5
Through-hole 12, for being able to maintain when the piston end 2 of support rod moves in sleeve inside and outside the two chambers and sleeve 5 of sleeve 5
Pressure balance.The position or quantity, the present embodiment of first through hole 11 and the second through-hole 12 are not further limited, position
It can be and face upward or downward, quantity can be one or more, but ensure not to be blocked.
The inside and outside environment of support device in the present embodiment is identical environment, and it is (such as naturally big to can be adapted for dry type environment
Compression ring border), it is readily applicable to wet type environment (such as water environment).Correspondingly, also divide in first chamber 17 and second chamber 18
Be not provided with fluid, fluid can by first through hole 11 and the second through-hole 12 in external environment and sleeve 5 first chamber 17
It circulates between second chamber 18.When dry type environment, fluid can be gas, such as air；When wet type environment, fluid can be with
For liquid, such as water.
The first through hole 11 that is arranged on sleeve 5, the second through-hole 12 can in the support device suddenly by external applied load when,
So that fluid is discharged or is passed through, is unlikely to cause 5 internal pressure of sleeve too big, to keep the pressure balance inside and outside sleeve 5.?
The effect of first through hole 11 and the second through-hole 12 is both relief valve and pressure-supplementing valve in the present embodiment.It can be on 5 bottom end of sleeve
It is provided with third through-hole 15, can further be convenient for the circulation of 5 bottom end fluid of sleeve.
Further, the support device further includes pedestal 9, and pedestal 9 is connect with sleeve 5.
Specifically, one end of pedestal 9 steel linear of side wall 16 or embedded board can be connect between storage, it is used for the branch
Support arrangement is fixed between storage on side wall 16, connection type preferred weld；The other end of pedestal 9 and 5 bottom end of sleeve are (i.e. on sleeve
One end opposite with its open end) connection, and the contact surface of the two is spherical shape.
That is, one end that pedestal 9 is connect with sleeve 5 has spherical recess, 5 bottom end of sleeve has and the recess portion phase
The spherical projection of adaptation, 5 bottom end of sleeve are set in the recess portion；Either, one end that pedestal 9 is connect with sleeve 5 can also be with
It is with spherical projection, 5 bottom end of sleeve has spherical recess compatible with the protrusion.In the present embodiment, institute as shown in Figure 1, Figure 2
Show, pedestal 9 preferably has spherical recess, and 5 bottom of sleeve has compatible spherical projection (i.e. spheric end) therewith.
Further, the support device further includes fixing piece, and fixing piece is set on pedestal 9, including 14 He of fixed ring
Bolt 19, in which: the spheric end of 5 bottom of sleeve from passed through in fixed ring 14 and in pedestal 9 recess portion in, thus by fixed ring
14 are sleeved on the spheric end of sleeve 5, and bolt 19 is used to fixed ring 14 being fixed on pedestal 9, to prevent the spheric end of sleeve 5
It is detached from from the recess portion of pedestal 9.The size of the spheric end of the size and 5 bottom of sleeve of the perforation of fixed ring 14 is adapted, bolt
19 quantity can be one or more, preferably two or four.
In the present embodiment, setting spherical for the contact surface of sleeve 5 and the junction of pedestal 9, the two cooperates, so that
The support device can relatively rotate in a certain range, act on without bending moment.It is (main between screen work and storage when earthquake
Side wall between storage) between relative angle when changing, ball type of contact surface can be to avoid side wall between support device and storage
It is damaged between 16 by too big moment of flexure.
Further, for the ease of support device installation, it is provided with pin hole 13 on the piston end 2 of support rod 1,
Pin hole 13 corresponding with pin hole 13 is provided on sleeve 5, the pin hole 13 is for being inserted into pin 4.The shape of pin hole 13 can be with
It is the center of circle, triangle or other polygons, it is preferably circular, as shown in Figure 1, the position of pin hole 13 is preferably in piston crown 21
On, the through-hole on sleeve 5 is preferably disposed on the middle position of sleeve 5, and the quantity of pin hole 13 is one or more, preferably
Two or four, the present embodiment do not further limit.
Accordingly for the support device in the present embodiment, it is also provided for installation accessory part during installation, installs
Accessory part includes the pin 4 being adapted with pin hole 13, and pin 4 passes through the through-hole on sleeve 5 and is plugged on piston crown 21
In pin hole 13.The quantity of pin 4 is identical as the quantity of pin hole 13, and the shape of pin 4 is cylindrical, item compatible with pin hole 13
Shape, taper are also possible to other shapes, and the present embodiment is preferably taper, remove again after can be convenient installation.
Support device in the present embodiment, during installation, i.e. erection stage, as shown in Figure 1, passing through sleeve 5 with pin 4
Through-hole is inserted into the pin hole 13 of piston crown 21, so that piston end 2 and sleeve 5 is rigidly connected, at this point, piston end 2 cannot cover
It being moved in cylinder 5, the first compressed spring 7 and the second compressed spring 8 are in compressive state, and initial compression length is identical, i.e., and the
The compressing force of one compressed spring 7 and the second compressed spring 8 is equal in magnitude, and support rod 1 is in equilibrium state, and suffered bonding force is
Zero.The screw rod end of support rod 1 is fastened on screen work side plate 10 by nut 6, pedestal 9 is fastened on side wall between storage
On 16.The spacing of side wall 16 between screen work side plate 10 and storage, can be by adjusting two nuts 6 until being suitable distance.
After being installed, as service stage, as shown in Fig. 2, pin 4 is removed, the first compressed spring 7 and second at this time
Compressed spring 8 is in compressive state, and the two length is constant, that is, is installed rear piston end 2 and screen work is not affected by initial external force.?
Service stage supports for elastic connection between support device and screen work, when by external applied load, can use in support device
The damping effect of buffer gear reduces suffered external applied load, so that screen work be protected not to be damaged.
When by external applied load (when such as earthquake), under the action of instantaneous external applied load, the piston end 2 of support rod is toward the first chamber
Room 17 is mobile, and the fluid of first chamber 17 is discharged from first through hole 11, and the fluid of support device external environment is from the second through-hole 12
Support device is set to play vibration damping or buffer function by the damping action of compressed spring and fluid into second chamber 18, thus
Reduce influence of the earthquake to screen work；After external applied load disappears, piston end 2 moves right, the first compressed spring 7 and the second compression bullet
Spring 8 restores balance state, and fluid enters first chamber 17 from first through hole 11, and the fluid of second chamber 18 is from 12 row of the second through-hole
Out, so that the pressure of first chamber 17 and second chamber 18 be made to keep identical.
Support device in the present embodiment, the support in addition to can be applied to the storage screen work, can be applicable to it
It needs the equipment or facility of vibration damping, and the present embodiment is not further qualified the application range of support device.
Support device in the present embodiment, structure is simple, can improve stress of the screen work in normal and earthquake, make
Screen work not will receive any initial external force when normal, can arrange in the unilateral side of screen work, bilateral or surrounding, improve branch
The scope of application of support arrangement, flexible arrangement enhancing；In earthquake, by compressed spring and fluid damping can play buffering,
The effect of vibration damping enhances the shock resistance of screen work；The spherical design of sleeve bottom can make screen work in run-off the straight, from
Moment further improves support device to the protective capability of screen work.
Embodiment 2
The present embodiment discloses a kind of storage system, the screen work including being set between storage and the support device in embodiment 1,
The support device is set between the storage between the screen work, and wherein support device provides resilient support for screen work, is used for
The suffered external force of buffering.
Specifically, hole compatible with support rod 1 is provided on screen work side plate 10, for making the support rod of support device
1 screw rod end passes through the hole, while is fixedly connected on the pedestal 9 of support device between storage on side wall 16.Screen work is placed
In storage, according to the distance between side wall 16 between screen work side plate 10 and storage, by adjusting nut 6 come adjusting supporting device
Length, to adapt between different screen work side plate 10 and storage spacing between side wall 16.
Further, the quantity of the support device is multiple, and multiple support devices, which can be, to be symmetrically set to
On screen work, as (as shown in Figure 4), support device is arranged in four sides of screen work in the opposite Bilateral Symmetry of screen work in support device
(as shown in Figure 6) is symmetrical arranged on face；Be also possible to it is asymmetric be set on screen work, as support device is set in the unilateral side of screen work
Set (as shown in Figure 3), (as shown in Figure 5), support device is respectively set in screen work on three sides of screen work in support device
It is respectively set on four sides but asymmetric (as shown in Figure 7) etc..The present embodiment does not do further the quantity of support device
It limits, can be selected according to demand.
The quantity of the screen work of storage system in the present embodiment can be single (as shown in fig. 3 to 7), be also possible to two
More than.When screen work quantity is more than two, using rigid connection between screen work, between screen work and storage between use embodiment 1
Described in support device be supported.
Storage system disclosed in the present embodiment, by by support device setting screen work side plate and storage between side wall it
Between, initial external force will not be generated after installation, flexible arrangement may be mounted at unilateral side, bilateral or surrounding of screen work etc., and can be with
It is arranged symmetrically, can also make that the arrangement for storing screen work is more convenient, adaptation range is wider with unsymmetrical arrangement.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a kind of support device, which is characterized in that including support rod (1), sleeve (5) and buffer gear,
One end of the sleeve is provided with opening；
One end of the support rod is set in the sleeve, and the other end is stretched out from the open end of the sleeve；
The buffer gear is set in the sleeve, including the first buffer cell and the second buffer cell, first buffering
Unit and second buffer cell act on the support rod, and the support rod is in the first buffer cell and described
It is zero that suffered resultant force is kept under the action of two buffer cells.
2. support device according to claim 1, which is characterized in that first buffer cell includes the first compression bullet
Spring, second buffer cell include the second compressed spring,
It is piston end (2) that the support rod, which is in one end in the sleeve, and sleeve is divided into first chamber by the piston end
(17) and second chamber (18), first compressed spring and second compressed spring be respectively arranged at the first chamber and
In the second chamber；
First compressed spring and second compressed spring are equal to the active force of the support rod, contrary.
3. support device according to claim 2, which is characterized in that the support device further includes baffle (3) and nut
(6), the baffle is set on the open end of the sleeve,
It is screw rod end that the support rod, which is in the other end outside sleeve, and the nut can be sleeved on the screw rod end；
First compressed spring is sleeved on the support rod, the both ends of the first compressed spring respectively with the baffle and described
The piston end of support rod offsets；
The both ends of second compressed spring offset with the support rod and the sleeve respectively.
4. support device according to claim 3, which is characterized in that be provided with first through hole in the first chamber
(11), it is provided in the second chamber the second through-hole (12).
5. support device according to claim 3, which is characterized in that be provided on the piston end of the support rod for inserting
Enter the pin hole (13) of pin, is provided with pin hole corresponding with the pin hole on the sleeve.
6. support device according to claim 1-5, which is characterized in that it further include pedestal (9), the pedestal tool
There is spherical recess portion,
The shape of the other end opposite with its open end is spherical shape compatible with the recess portion on the sleeve, the sleeve
Spheric end is set in the recess portion.
7. support device according to claim 6, which is characterized in that further include fixing piece, the fixing piece is set to described
On pedestal, for preventing the spheric end of the sleeve to be detached from from the recess portion of the pedestal.
8. support device according to claim 7, which is characterized in that the fixing piece includes fixed ring (14) and bolt
(19),
The fixed ring is sleeved on the spheric end of the sleeve；
The bolt, for connecting the fixed ring and the pedestal.
9. a kind of storage system, including the screen work being set between storage, which is characterized in that further include any one of claim 1-8 institute
The support device stated, the support device are set between the storage between the screen work.
10. storage system according to claim 9, which is characterized in that the quantity of the support device is multiple, Duo Gesuo
Support device is stated to be distributed between the storage between the side wall of the screen work.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296252A (en) * | 2019-05-30 | 2019-10-01 | 刘欢 | A kind of heat supply pipeline ball valve with anti-deforming structure |
| CN112392883A (en) * | 2020-11-20 | 2021-02-23 | 湖南傲英创视信息科技有限公司 | Vibration blocking equipment for stepping photoelectric turntable |
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| CN109798323B (en) | 2021-02-12 |
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