CN111571370A - Surface polishing device for ball valve - Google Patents

Surface polishing device for ball valve Download PDF

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Publication number
CN111571370A
CN111571370A CN202010440891.8A CN202010440891A CN111571370A CN 111571370 A CN111571370 A CN 111571370A CN 202010440891 A CN202010440891 A CN 202010440891A CN 111571370 A CN111571370 A CN 111571370A
Authority
CN
China
Prior art keywords
groove
fixedly connected
spring
ball valve
springs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202010440891.8A
Other languages
Chinese (zh)
Inventor
沈升好
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Fanchang Wannan Valve Casting Co Ltd
Original Assignee
Anhui Fanchang Wannan Valve Casting Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anhui Fanchang Wannan Valve Casting Co Ltd filed Critical Anhui Fanchang Wannan Valve Casting Co Ltd
Priority to CN202010440891.8A priority Critical patent/CN111571370A/en
Publication of CN111571370A publication Critical patent/CN111571370A/en
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B15/00Machines or devices designed for grinding seat surfaces; Accessories therefor
    • B24B15/04Machines or devices designed for grinding seat surfaces; Accessories therefor on valve members
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00Other grinding machines or devices
    • B24B27/0007Movable machines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00Component parts such as frames, beds, carriages, headstocks
    • B24B41/005Feeding or manipulating devices specially adapted to grinding machines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00Component parts such as frames, beds, carriages, headstocks
    • B24B41/02Frames; Beds; Carriages
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition

Abstract

The invention relates to the technical field of ball valve polishing devices, and discloses a surface polishing device for a ball valve, which comprises a polisher main body, wherein a plurality of first springs are uniformly and equidistantly fixedly distributed on the bottom side wall of the polisher main body in a normal annular manner, the lower ends of the first springs are fixedly connected with a base together, T-shaped chutes are symmetrically formed in the bottom side wall of the polisher main body between the first springs, T-shaped sliding blocks are connected in the T-shaped chutes in a sliding manner, the lower ends of the two T-shaped sliding blocks penetrate through notches of the T-shaped chutes and extend downwards and are hinged with connecting rods, a connecting plate is hinged between the two connecting rods together, a second spring is fixedly connected on the bottom side wall of the connecting plate, the lower ends of the second spring are fixedly connected with the base, and third springs are fixedly connected on the side walls of the two T-. This a surface grinding device for ball valve, the effectual polisher main part that just is convenient for of antidetonation removes.

Description

Surface polishing device for ball valve
Technical Field
The invention relates to the technical field of ball valve polishing devices, in particular to a surface polishing device for a ball valve.
Background
The in-process that the ball valve processed need polish, is CN 206029523U's patent at the chinese patent grant publication number, discloses a polisher for ball valve, including bracing piece, brill tool bit, set screw, motor, adjustment disc, shock mount, drive wheel, slide bar, polisher main part, driver, screw axis, control box, control head and rotation axis, the top of bracing piece is fixed with the drive wheel, it has the set screw to bore the tool bit through screw axis connection, and the below of set screw is provided with the control box, the motor is installed on the right side of motor, the centre of drive wheel and polisher main part is provided with the slide bar, and the top of polisher main part is connected with the slide bar, the left side of driver is connected with the screw axis, the inside of control box is inlayed and is had the control head. One of the above patents for a grinder for a ball valve has the following disadvantages: the in-process shock attenuation effect that polisher main part used is poor, and polisher main part is not convenient for remove, for this reason, we provide a surface grinding device for ball valve.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the surface grinding device for the ball valve, which has the advantages of good anti-seismic effect, convenience in moving of the grinding machine main body and the like, and solves the problems of poor anti-seismic effect and inconvenience in moving of the conventional grinding machine main body.
(II) technical scheme
In order to achieve the purposes of good anti-seismic effect and convenience for the movement of the polisher body, the invention provides the following technical scheme: a surface polishing device for a ball valve comprises a polisher body, wherein a plurality of first springs are fixedly connected to the bottom side wall of the polisher body in a regular annular distribution and uniform and equidistant manner, the lower ends of the first springs are fixedly connected with a base together, T-shaped sliding grooves are symmetrically formed in the bottom side wall of the polisher body between the first springs, the T-shaped sliding grooves are internally and slidably connected with T-shaped sliding blocks, the lower ends of the two T-shaped sliding blocks penetrate through the notches of the T-shaped sliding grooves and extend downwards, and is hinged with a connecting rod, a connecting plate is hinged between the two connecting rods, a second spring is fixedly connected on the side wall of the bottom of the connecting plate, the lower end of the second spring is fixedly connected with the base, the two T-shaped sliding blocks are fixedly connected with third springs on the side walls back to back, and the other ends of the third springs are fixedly connected with the groove walls of the T-shaped sliding grooves.
Preferably, be located a plurality of the stable groove has been seted up to the symmetry on the bottom lateral wall of polisher main part outside the first spring, first spout has been seted up to the symmetry on the relative cell wall in stable groove, sliding connection has first slider in the first spout, two first slider one end in opposite directions all passes the notch and the outside extension that corresponds first spout, and common fixedly connected with buffer beam, the notch and the outside extension of stable groove are passed to the lower extreme of buffer beam, and with base fixed connection.
Preferably, a ball groove is formed in one end, close to the bottom of the T-shaped sliding groove, of the T-shaped sliding block, a ball is connected in the ball groove in a rolling mode, and one end, far away from the bottom of the ball groove, of the ball penetrates through a notch of the ball groove and extends outwards and is connected with the bottom of the T-shaped sliding groove in a rolling mode.
Preferably, the bottom four corners department of base has all seted up and has accomodate the groove, it has seted up the card hole on the cell wall that the groove is close to one side to accomodate the groove, accomodate the tank bottom fixedly connected with fourth spring in groove, the piece is accomodate to the lower extreme fixedly connected with of fourth spring, the universal wheel is installed to the lower extreme of accomodating the piece, it has seted up the draw-in groove on being close to the lateral wall of accomodating the groove tank bottom to accomodate the piece, the draw-in groove lies in same one side with the card hole, the tank bottom fixedly connected with fifth spring of draw-in groove, the other end fixedly connected with fixture block of fifth spring, the notch of draw-in groove is passed to the one end that the draw-in groove tank bottom.
Preferably, a rubber pad is fixedly connected to the side wall of the bottom of the base.
Preferably, the base and the sander body are both coated with a rust-proof paint.
Preferably, the accommodating groove is provided with a second sliding groove far away from the groove wall of the clamping hole, a second sliding block is connected in the second sliding groove in a sliding mode, and one end, far away from the groove bottom of the second sliding groove, of the second sliding block penetrates through the groove opening corresponding to the second sliding groove and extends outwards and is fixedly connected with the accommodating block.
(III) advantageous effects
Compared with the prior art, the invention provides a surface grinding device for a ball valve, which has the following beneficial effects:
1. this a surface grinding device for ball valve, through setting up first spring, a pedestal, T type spout, T type slider, the connecting rod, the connecting plate, the second spring, the third spring, the stable trough, first spout, first slider and buffer lever, when the in-process that the polisher main part used takes place vibrations, transmit the vibrations power for first spring, and then first spring consumes vibrations power, and simultaneously, the polisher main part transmits vibrations power for the second spring, and then make two connecting rod motions, and then transmit vibrations power for T type slider, and then make two T type sliders carry out back of the body motion, and then transmit vibrations power for the third spring, and then the third spring consumes vibrations power, and then first spring, second spring and third spring cooperation consume vibrations power, protect the polisher main part.
2. This a surface grinding device for ball valve, accomodate the groove through the setting, the card hole, the fourth spring, the universal wheel, accomodate the piece, draw-in groove and fifth spring, when needing polisher main part to remove, apply an ascending pulling force to the polisher main part, and then under the fourth spring force effect this moment, accomodate the piece downstream, when the draw-in groove is in same axis with the card hole, the fifth spring resets, make the fixture block card go into in the card hole, and then make and accomodate the piece and be fixed, and then make the polisher main part can remove, and then be convenient for the removal of device, remove the back that finishes, apply a thrust to the card piece, and then after the fixture block breaks away from the card hole, under polisher main part action of gravity, make accomodate the piece and accomodate the inslot by accomodating, and then make the stable placing of polisher main part.
Drawings
Fig. 1 is a schematic structural view of a surface grinding device for a ball valve according to the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is an enlarged view of portion B of FIG. 1;
fig. 4 is an enlarged view of a portion C in fig. 3.
In the figure: 1 polisher main part, 2 first spring, 3 base, 4T type spout, 5T type slider, 6 connecting rods, 7 connecting plates, 8 second spring, 9 third spring, 10 steady groove, 11 first spout, 12 first slider, 13 buffer bar, 14 ball groove, 15 ball, 16 accomodate the groove, 17 card holes, 18 fourth spring, 19 universal wheel, 20 accomodate the piece, 21 draw-in groove, 22 fifth spring, 23 fixture block, 24 second spout, 25 second slider.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a surface polishing device for a ball valve comprises a polisher body 1, a plurality of first springs 2 are fixedly connected to the bottom side wall of the polisher body 1 in a regular annular distribution and at equal intervals, a base 3 is fixedly connected to the lower ends of the first springs 2, T-shaped chutes 4 are symmetrically formed in the bottom side wall of the polisher body 1 between the first springs 2, T-shaped sliders 5 are slidably connected to the T-shaped chutes 4, the lower ends of the two T-shaped sliders 5 penetrate through the notches of the T-shaped chutes 4 and extend downward, connecting rods 6 are hinged to the lower ends of the two T-shaped sliders 5, a connecting plate 7 is hinged to the two connecting rods 6, a second spring 8 is fixedly connected to the bottom side wall of the connecting plate 7, the lower ends of the second spring 8 are fixedly connected to the base 3, and third springs 9 are fixedly connected to the opposite side walls of the two T-, the other end of third spring 9 and the cell wall fixed connection of T type spout 4, when the in-process that polisher main part 1 used takes place vibrations, transmit the vibrations power for first spring 2, and then first spring 2 consumes the vibrations power, simultaneously, polisher main part 1 transmits the vibrations power for second spring 8, and then make two connecting rods 6 motion, and then transmit the vibrations power for T type slider 5, and then make two T type sliders 5 carry out back on the back motion, and then transmit the vibrations power for third spring 9, and then third spring 9 consumes the vibrations power, and then first spring 2, second spring 8 and third spring 9 cooperation consume the vibrations power, protect polisher main part 1.
Lie in outside a plurality of first springs 2 stable groove 10 has been seted up to the symmetry on the bottom lateral wall of polisher main part 1, first spout 11 has been seted up to the symmetry on the relative cell wall of stable groove 10, sliding connection has first slider 12 in first spout 11, the notch that corresponds first spout 11 and outside extension are all passed to two first slider 12 one ends in opposite directions, and common fixedly connected with buffer beam 13, the notch that stable groove 10 was passed to the lower extreme of buffer beam 13 and outside extension, and 3 fixed connection with the base, make the firmer of being connected between polisher main part 1 and the base 3.
The T-shaped sliding block 5 is close to one end of the bottom of the T-shaped sliding groove 4 and is provided with a ball groove 14, a ball 15 is connected in the ball groove 14 in a rolling mode, one end, far away from the bottom of the ball groove 14, of the ball 15 penetrates through the notch of the ball groove 14 and extends outwards, and is connected with the bottom of the T-shaped sliding groove 4 in a rolling mode, and therefore the T-shaped sliding block 5 can slide more quickly.
The four corners of the bottom of the base 3 are respectively provided with a containing groove 16, the wall of the containing groove 16 close to one side is provided with a clamping hole 17, the bottom of the containing groove 16 is fixedly connected with a fourth spring 18, the lower end of the fourth spring 18 is fixedly connected with a containing block 20, the lower end of the containing block 20 is provided with a universal wheel 19, the side wall of the containing block 20 close to the bottom of the containing groove 16 is provided with a clamping groove 21, the clamping groove 21 and the clamping hole 17 are positioned at the same side, the bottom of the clamping groove 21 is fixedly connected with a fifth spring 22, the other end of the fifth spring 22 is fixedly connected with a clamping block 23, one end of the clamping block 23 far away from the bottom of the clamping groove 21 passes through the notch of the clamping groove 21 and extends outwards and abuts against the wall of the containing groove 16, when the sander body 1 needs to move, an upward pulling force is applied to the sander body 1, and then the containing block 20 moves downwards under the elastic force of the fourth spring 18, the fifth spring 22 resets, so that the clamping block 23 is clamped into the clamping hole 17, and then the accommodating block 20 is fixed, and then the polisher body 1 can move, and then the device can move conveniently, and after the movement is completed, a thrust is applied to the clamping block 23, and then after the clamping block 23 is separated from the clamping hole 17, under the action of gravity of the polisher body 1, the accommodating block 20 is accommodated in the accommodating groove 16, and then the polisher body 1 is placed stably.
Fixedly connected with rubber pad on the bottom lateral wall of base 3 for the stability that base 3 placed.
The base 3 and the sander main body 1 are both coated with antirust paint, so that the base 3 and the sander main body 1 are prevented from rusting.
The second sliding groove 24 is formed in the groove wall, away from the card hole 17, of the accommodating groove 16, the second sliding groove 24 is connected with the second sliding block 25 in a sliding mode, one end, away from the groove bottom of the second sliding groove 24, of the second sliding block 25 penetrates through the groove opening corresponding to the second sliding groove 24 and extends outwards, the accommodating block 20 is fixedly connected with the accommodating block, and the situation that the accommodating block 20 is separated from the accommodating groove 16 is prevented.
In conclusion, when the polisher body 1 vibrates in the using process, the vibration force is transmitted to the first spring 2, and then the first spring 2 consumes the vibration force, meanwhile, the polisher body 1 transmits the vibration force to the second spring 8, so that the two connecting rods 6 move, and further transmits the vibration force to the T-shaped sliders 5, so that the two T-shaped sliders 5 move back to back, and further transmits the vibration force to the third spring 9, so that the third spring 9 consumes the vibration force, and further the first spring 2, the second spring 8 and the third spring 9 cooperatively consume the vibration force to protect the polisher body 1; when the polisher body 1 needs to be moved, an upward pulling force is applied to the polisher body 1, and then the fourth spring 18 acts on the elastic force at the moment, the accommodating block 20 moves downwards, when the clamping groove 21 and the clamping hole 17 are located on the same axis, the fifth spring 22 resets, the clamping block 23 is clamped into the clamping hole 17, and then the accommodating block 20 is fixed, and further the polisher body 1 can move, and further the device can move conveniently, after the movement is completed, a pushing force is applied to the clamping block 23, and further after the clamping block 23 is separated from the clamping hole 17, the polisher body 1 acts on the gravity, and the accommodating block 20 is accommodated into the accommodating groove 16, and further the polisher body 1 is placed stably.
It is to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. A surface grinding device for a ball valve, comprising a grinder body (1), characterized in that: the grinding machine is characterized in that a plurality of first springs (2) are fixedly connected to the side wall of the bottom of the grinding machine main body (1) in a regular annular distribution uniform equidistant mode, a plurality of bases (3) are fixedly connected to the lower end of the first springs (2) in a common mode, T-shaped sliding grooves (4) are symmetrically formed in the side wall of the bottom of the grinding machine main body (1) between the first springs (2), T-shaped sliding blocks (5) are connected to the T-shaped sliding grooves (4) in a sliding mode, the lower ends of the two T-shaped sliding blocks (5) penetrate through notches of the T-shaped sliding grooves (4) and extend downwards and are hinged to connecting rods (6), a connecting plate (7) is hinged to the two connecting rods (6) in a common mode, second springs (8) are fixedly connected to the side wall of the bottom of the connecting plate (7), the lower ends of the second springs (8) are fixedly connected to the bases (3), and third springs (9), the other end of the third spring (9) is fixedly connected with the groove wall of the T-shaped sliding groove (4).
2. A surface grinding apparatus for a ball valve as defined in claim 1, wherein: lie in a plurality of stable groove (10) have been seted up to the symmetry on the bottom lateral wall of polisher main part (1) outside first spring (2), first spout (11) have been seted up to the symmetry on the relative cell wall of stable groove (10), sliding connection has first slider (12) in first spout (11), two the notch and the outside extension that corresponds first spout (11) are all passed to first slider (12) one end in opposite directions, and common fixedly connected with buffer beam (13), the notch and the outside extension of stable groove (10) are passed to the lower extreme of buffer beam (13), and with base (3) fixed connection.
3. A surface grinding apparatus for a ball valve as defined in claim 1, wherein: t type slider (5) are close to the one end of T type spout (4) tank bottom and have been seted up ball groove (14), roll in ball groove (14) and be connected with ball (15), ball (15) are kept away from the one end of ball groove (14) tank bottom and are passed ball groove (14) notch and outwards extend, and with the tank bottom roll connection of T type spout (4).
4. A surface grinding apparatus for a ball valve as defined in claim 1, wherein: the four corners of the bottom of the base (3) are respectively provided with a containing groove (16), the wall of the containing groove (16) close to one side is provided with a clamping hole (17), a fourth spring (18) is fixedly connected with the bottom of the accommodating groove (16), an accommodating block (20) is fixedly connected with the lower end of the fourth spring (18), the lower end of the accommodating block (20) is provided with a universal wheel (19), the side wall of the accommodating block (20) close to the bottom of the accommodating groove (16) is provided with a clamping groove (21), the clamping groove (21) and the clamping hole (17) are positioned at the same side, a fifth spring (22) is fixedly connected with the bottom of the clamping groove (21), the other end of the fifth spring (22) is fixedly connected with a clamping block (23), and one end, far away from the bottom of the clamping groove (21), of the clamping block (23) penetrates through the notch of the clamping groove (21) and extends outwards, and is abutted against the groove wall of the accommodating groove (16).
5. A surface grinding apparatus for a ball valve as defined in claim 1, wherein: and a rubber pad is fixedly connected to the side wall of the bottom of the base (3).
6. A surface grinding apparatus for a ball valve as defined in claim 1, wherein: and the base (3) and the sander main body (1) are coated with antirust paint.
7. A surface grinding device for a ball valve as defined in claim 4, wherein: accomodate groove (16) and keep away from second spout (24) on the cell wall of card hole (17), sliding connection has second slider (25) in second spout (24), the one end that second spout (24) tank bottom was kept away from in second slider (25) all passes the notch that corresponds second spout (24) and outwards extends, and with accomodate piece (20) fixed connection.
CN202010440891.8A 2020-05-22 2020-05-22 Surface polishing device for ball valve Withdrawn CN111571370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010440891.8A CN111571370A (en) 2020-05-22 2020-05-22 Surface polishing device for ball valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010440891.8A CN111571370A (en) 2020-05-22 2020-05-22 Surface polishing device for ball valve

Publications (1)

Publication Number Publication Date
CN111571370A true CN111571370A (en) 2020-08-25

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CN202010440891.8A Withdrawn CN111571370A (en) 2020-05-22 2020-05-22 Surface polishing device for ball valve

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112798326A (en) * 2021-01-04 2021-05-14 广东健地农业科技有限公司 Contaminated geological soil restoration sample extraction device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0552397U (en) * 1991-12-25 1993-07-13 豊田工機株式会社 Anti-vibration support device
CN206029523U (en) * 2016-08-18 2017-03-22 浙江祥和阀门有限公司 A polisher for ball valve
CN107824324A (en) * 2017-11-03 2018-03-23 佘峰 A kind of good ore crusher of stability
CN108060555A (en) * 2018-02-02 2018-05-22 欧新颖 One kind can extend clothes-horse family expenses contraction type Mobile clothes hanger
CN208132635U (en) * 2018-03-06 2018-11-23 浙江农业商贸职业学院 Grinding device is used in a kind of auto parts and components processing of damping
CN109434002A (en) * 2018-09-10 2019-03-08 安顺市虹翼特种钢球制造有限公司 A kind of steel ball production cold-heading equipment with shock-absorbing function

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0552397U (en) * 1991-12-25 1993-07-13 豊田工機株式会社 Anti-vibration support device
CN206029523U (en) * 2016-08-18 2017-03-22 浙江祥和阀门有限公司 A polisher for ball valve
CN107824324A (en) * 2017-11-03 2018-03-23 佘峰 A kind of good ore crusher of stability
CN108060555A (en) * 2018-02-02 2018-05-22 欧新颖 One kind can extend clothes-horse family expenses contraction type Mobile clothes hanger
CN208132635U (en) * 2018-03-06 2018-11-23 浙江农业商贸职业学院 Grinding device is used in a kind of auto parts and components processing of damping
CN109434002A (en) * 2018-09-10 2019-03-08 安顺市虹翼特种钢球制造有限公司 A kind of steel ball production cold-heading equipment with shock-absorbing function

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112798326A (en) * 2021-01-04 2021-05-14 广东健地农业科技有限公司 Contaminated geological soil restoration sample extraction device

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Application publication date: 20200825