CN110725822B - Flow valve for hydraulic oil cylinder convenient for hydraulic control proportion - Google Patents
Flow valve for hydraulic oil cylinder convenient for hydraulic control proportion Download PDFInfo
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- CN110725822B CN110725822B CN201910953174.2A CN201910953174A CN110725822B CN 110725822 B CN110725822 B CN 110725822B CN 201910953174 A CN201910953174 A CN 201910953174A CN 110725822 B CN110725822 B CN 110725822B
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- plate
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- rotating plate
- frame
- valve body
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
Abstract
The invention discloses a flow valve for a hydraulic oil cylinder, which is convenient for hydraulic control proportion and comprises a valve body, a threaded rod, a fixing frame and a second bottom plate, wherein the threaded rod penetrates through a sleeve and a first through hole, the bottom of the valve body and the fixing frame are respectively provided with a second through hole, the upper side of the first bottom plate is fixedly provided with a filter frame through a third bolt, the right side of the fixing frame is provided with a first rotating plate, a second rotating plate and a third rotating plate, the upper side and the lower side of the second rotating plate are respectively provided with a fixing plate, the rear side of the first rotating plate, the rear side of the second rotating plate and the rear side of the third rotating plate are respectively fixedly provided with a rotating rod, a sliding block is arranged at the front side of a compression spring, and a safety rotating frame is fixed at the rear side. The flow valve for the hydraulic oil cylinder convenient for hydraulic control proportion pulls backwards and then rotates the safety rotating frame until the first rotating plate, the second rotating plate or the third rotating plate rotates to a horizontal state from a vertical state, and at the moment, materials flow through the first rotating plate, the second rotating plate or the third rotating plate, so that hydraulic control proportion is completed.
Description
Technical Field
The invention relates to the technical field of hydraulic oil cylinders, in particular to a flow valve for a hydraulic oil cylinder, which facilitates hydraulic control of proportion.
Background
The hydraulic oil cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and does linear reciprocating motion, has simple structure and reliable work, can remove a speed reducer when realizing reciprocating motion, has no transmission clearance and moves stably, thereby being widely applied to various mechanical hydraulic systems, and the flow valve is required to be used for controlling the oil quantity when the hydraulic oil cylinder produces oil.
The material among the current flow valve is at the in-process that flows, and the impurity of doping in the material can influence the quality of material, and the material only can flow with a proportion, and the leakproofness is not good can influence the effect of damming when damming simultaneously, consequently uses convenient inadequately, to above-mentioned problem, needs improve current equipment.
Disclosure of Invention
The invention aims to provide a flow valve for a hydraulic oil cylinder, which facilitates hydraulic control of proportion, and solves the problems that impurities doped in materials can influence the quality of the materials in the flowing process of the materials in the existing flow valve in the background art, the materials can only flow in one proportion, and meanwhile, the closure effect is influenced due to poor sealing property in closure.
In order to achieve the purpose, the invention provides the following technical scheme: a flow valve for a hydraulic oil cylinder convenient for hydraulic control proportion comprises a valve body, a threaded rod, a fixing frame and a second bottom plate, wherein mounting holes are formed in the left side and the right side of the valve body, the threaded rod penetrates through a sleeve and a first through hole, the first through hole is formed in a sleeve frame, the sleeve frame is connected with the threaded rod through a connecting rod, second through holes are formed in the bottom of the valve body and the fixing frame, the fixing frame is fixed in the valve body, the sleeve frame and the first bottom plate are arranged in the second through holes in the upper side and the lower side of the valve body respectively, a filter frame is fixed on the upper side of the first bottom plate through a third bolt, the top of the filter frame is clamped and connected to the inner top of the sleeve frame, a first rotating plate, a second rotating plate and a third rotating plate are arranged on the right side of the fixing frame, the first rotating plate is arranged on the upper side of the second rotating plate, the second rotating plate is arranged on the upper side, and the fixed plate is fixed in the valve body, the rear sides of the first rotating plate, the second rotating plate and the third rotating plate are respectively fixed with a rotating rod, a sliding groove is formed in each rotating rod, a sliding block and a compression spring are arranged in each sliding groove, the sliding block is arranged on the front side of each compression spring, each compression spring is wrapped on the outer side of the corresponding safety rotating frame, the safety rotating frames are fixed on the rear sides of the sliding blocks, and the safety rotating frames penetrate through the rear sides of the rotating rods.
Preferably, the mounting holes are uniformly distributed on the left side and the right side of the valve body.
Preferably, the sleeve is connected to the top of the valve body through a first bolt in a threaded manner, and a threaded rod is connected to the inner thread of the sleeve in a threaded manner.
Preferably, the first bottom plate is connected to the bottom of the threaded rod through a second bolt in a threaded mode.
Preferably, the annular groove is formed in the outer side of the first bottom plate, the sealing ring is connected to the inner side of the annular groove in a clamping mode, and the sealing ring is connected to the first bottom plate through a fourth bolt in a threaded mode.
Preferably, the upper end face of the second bottom plate is fixed with a ring block, the ring block is clamped and connected to the lower end face of the valve body, and the second bottom plate is connected to the valve body through a fifth bolt in a threaded mode.
Preferably, the first rotating plate, the second rotating plate and the third rotating plate are rotatably connected to the inner side of the valve body.
Preferably, each rotating rod and the sliding block form a telescopic structure through a compression spring.
Preferably, the front end face of the safety rotating frame is clamped and connected in the clamping grooves, the clamping grooves are formed in the rear end face of the valve body, and the number of the clamping grooves is four.
Preferably, the bull stick is fixed in the rear side of first commentaries on classics board, the rear side of second commentaries on classics board and the rear side of third commentaries on classics board, the first commentaries on classics board of the backward pulling, the insurance revolving rack of second commentaries on classics board or third commentaries on classics board rear side, rotate the insurance revolving rack again, thereby drive the bull stick that corresponds and rotate, first commentaries on classics board, second commentaries on classics board or third commentaries on classics board rotates to the horizontality from vertical state, make the material flow through first commentaries on classics board, second commentaries on classics board or third commentaries on classics board, reach the purpose of control material flow ratio, loosen the insurance revolving rack afterwards, the slider resets under compression spring's effect, the insurance revolving rack block is fixed in the.
Compared with the prior art, the beneficial effects of the invention are that: the flow valve for the hydraulic oil cylinder convenient for hydraulic control proportion,
(1) the left side and the right side of the valve body can be fixed on related equipment through the mounting holes and the external bolts, so that the valve body is convenient to mount and use;
(2) the filter frame can play a role in filtering in the flowing process of the material, one part of impurities remain on the outer side of the filter frame, and the other part of impurities fall on the first bottom plate, so that the transmission quality of the material is improved;
(3) the threaded rod can be manually rotated to move upwards, so that the first bottom plate is driven to move upwards until the first bottom plate is positioned in the second through hole, and the sealing ring can increase the sealing property between the first bottom plate and the fixing frame, so that the purpose of intercepting is achieved;
(4) the safety rotating frame is pulled backwards and then rotated until the first rotating plate, the second rotating plate or the third rotating plate rotates to a horizontal state from a vertical state, at the moment, the materials flow through the first rotating plate, the second rotating plate or the third rotating plate, the safety rotating frame is loosened, the safety rotating frame can be clamped in the clamping groove under the reset action of the compression spring so as to be fixed, and the corresponding safety rotating frame on the first rotating plate, the second rotating plate or the third rotating plate can be rotated according to specific requirements so as to complete the hydraulic control proportion;
(5) after work, successively dismantle after second bottom plate, first bottom plate and the filter frame with impurity clearance get off to improve the inside clean and tidy nature of the device.
Drawings
FIG. 1 is a schematic cross-sectional front view of the present invention;
FIG. 2 is a schematic top view of the cross-sectional structure of the present invention;
FIG. 3 is a schematic bottom view of the present invention;
FIG. 4 is a schematic diagram of the right-view structure of the present invention;
FIG. 5 is a left side view of the present invention;
FIG. 6 is an enlarged view of the structure at A in FIG. 1 according to the present invention;
FIG. 7 is an enlarged view of the structure at B in FIG. 2 according to the present invention.
In the figure: 1. the valve body, 2, a mounting hole, 3, a sleeve, 4, a first bolt, 5, a threaded rod, 6, a first through hole, 7, a sleeve frame, 8, a connecting rod, 9, a second through hole, 10, a fixing frame, 11, a first bottom plate, 12, a second bolt, 13, a filter frame, 14, a third bolt, 15, a ring groove, 16, a sealing ring, 17, a fourth bolt, 18, a second bottom plate, 19, a ring block, 20, a fifth bolt, 21, a first rotating plate, 22, a second rotating plate, 23, a third rotating plate, 24, a fixing plate, 25, a rotating rod, 26, a sliding groove, 27, a sliding block, 28, a compression spring, 29, a safety rotating frame, 30 and a clamping groove.
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. 1-7, the present invention provides a technical solution: a flow valve for a hydraulic oil cylinder convenient for hydraulic control proportion comprises a valve body 1, a threaded rod 5, a fixing frame 10 and a second bottom plate 18, wherein mounting holes 2 are formed in the left side and the right side of the valve body 1, the mounting holes 2 are uniformly distributed in the left side and the right side of the valve body 1, the valve body 1 can be fixed on corresponding equipment under the action of the mounting holes 2 and a threaded connecting piece, so that the mounting and dismounting work of the flow valve is facilitated, the threaded rod 5 penetrates through a sleeve 3 and a first through hole 6, the first through hole 6 is formed in a sleeve frame 7, the sleeve frame 7 is connected with the threaded rod 5 through a connecting rod 8, the sleeve 3 is in threaded connection with the top of the valve body 1 through a first bolt 4, the threaded rod 5 is in threaded connection with the sleeve 3, the sleeve 3 can be fixed on the valve body 1 by rotating the first bolt 4, and then the threaded rod 5 can, thereby facilitating subsequent operations.
According to the drawings of fig. 1, fig. 2 and fig. 3, the bottom of the valve body 1 and the fixing frame 10 are both provided with second through holes 9, the fixing frame 10 is fixed in the valve body 1, meanwhile, the second through holes 9 at the upper side and the lower side are respectively provided with a sleeve frame 7 and a first bottom plate 11, the first bottom plate 11 is in threaded connection with the bottom of the threaded rod 5 through second bolts 12, after the work is finished and the second bottom plate 18 is taken down, the second bolts 12 are taken down to disassemble the first bottom plate 11, so that the first bottom plate 11 is separated from the threaded rod 5, thereby facilitating the subsequent disassembling work of the filter frame 13, the upper side of the first bottom plate 11 is fixed with a filter frame 13 through third bolts 14, the top of the filter frame 13 is in clamped connection with the inner top of the sleeve frame 7, the outer side of the first bottom plate 11 is provided with a ring groove 15, the inner side of the ring groove 15 is in clamped connection with a sealing ring 16, when first bottom plate 11 is in second through-hole 9, sealing washer 16 can increase the leakproofness between first bottom plate 11 and the mount 10, thereby the reinforcing effect of damming, take off fourth bolt 17 after the work and can dismantle sealing washer 16, convenient the change, the up end of second bottom plate 18 is fixed with ring piece 19, and the lower terminal surface at valve body 1 is connected to ring piece 19 block, second bottom plate 18 is through fifth bolt 20 threaded connection on valve body 1 simultaneously, ring piece 19 can play spacing and reinforced (rfd) effect to the installation of second bottom plate 18, take off fifth bolt 20 after the work and can dismantle second bottom plate 18, thereby make things convenient for the dismantlement work of follow-up first bottom plate 11 and filter frame 13.
According to fig. 1, 2, 4 and 5, a first rotating plate 21, a second rotating plate 22 and a third rotating plate 23 are arranged on the right side of the fixed frame 10, the first rotating plate 21 is arranged on the upper side of the second rotating plate 22, the second rotating plate 22 is arranged on the upper side of the third rotating plate 23, the first rotating plate 21, the second rotating plate 22 and the third rotating plate 23 are rotatably connected to the inner side of the valve body 1, the first rotating plate 21, the second rotating plate 22 and the third rotating plate 23 can complete the flowing of materials with different proportions when rotating to the horizontal state respectively, fixing plates 24 are arranged on the upper side and the lower side of the second rotating plate 22, and the fixing plates 24 are fixed in the valve body 1.
As shown in fig. 1, 2, 6 and 7, a rotating rod 25 is fixed on the rear side of the first rotating plate 21, the rear side of the second rotating plate 22 and the rear side of the third rotating plate 23, a sliding slot 26 is formed in each rotating rod 25, a sliding block 27 and a compression spring 28 are arranged in each sliding slot 26, each rotating rod 25 and the sliding block 27 form a telescopic structure, when the safety rotating frame 29 is pulled backwards and rotated, the corresponding rotating rod 25 rotates along with the rotating rod, the corresponding first rotating plate 21, second rotating plate 22 or third rotating plate 23 also rotates along with the rotating rod, materials flow according to a required proportion, then the safety rotating frame 29 is loosened, the safety rotating frame 29 can be fixed on the valve body 1 again under the reset action of the compression spring 28, the sliding block 27 is arranged on the front side of the compression spring 28, the compression spring 28 wraps the outer side of the safety rotating frame 29, the safety rotating frame 29 is fixed on the rear side of the sliding block 27, the safety rotating frame 29 penetrates through the rear side of the rotating rod 25, the front end face of the safety rotating frame 29 is connected in the clamping groove 30 in a clamping mode, the clamping groove 30 is formed in the rear end face of the valve body 1, four clamping grooves 30 are formed in the safety rotating frame 29, the safety rotating frame 29 is loosened after the safety rotating frame 29 rotates, the safety rotating frame 29 is fixedly clamped in the corresponding clamping groove 30, the clamping groove 30 plays a reinforcing role for the safety rotating frame 29, the rotating rod 25 is fixed on the rear side of the first rotating plate 21, the rear side of the second rotating plate 22 and the rear side of the third rotating plate 23, the safety rotating frame 29 on the rear side of the first rotating plate 21, the rear side of the second rotating plate 22 or the rear side of the third rotating plate 23 is pulled backwards, the safety rotating frame 29 is rotated again, the corresponding rotating rod 25 is driven to rotate, the first rotating plate 21, the second rotating plate 22 or the third rotating plate 23 rotates from a vertical state to a horizontal state, materials flow through the first rotating plate 21, the second rotating plate 22 or the third rotating plate 23, the purpose of controlling the material flow, then, the safety rotating frame 29 is loosened, the sliding block 27 is reset under the action of the compression spring 28, the safety rotating frame 29 is clamped and fixed in the corresponding clamping groove 30, and the whole flow operation control is more convenient and accurate.
The working principle of the embodiment is as follows: when the flow valve for the hydraulic oil cylinder with the convenient hydraulic control proportion is used, the left side and the right side of the flow valve are respectively fixed on corresponding equipment through the mounting hole 2 and an external bolt, part of impurities are left on the outer side of the filter frame 13 through the filtering action of the filter frame 13 during the flowing process of materials, the other part of impurities fall onto the first bottom plate 11, then the materials continuously flow rightwards through the first through hole 6, the safety rotating frame 29 on the rear side of the first rotating plate 21, the second rotating plate 22 or the third rotating plate 23 is pulled backwards, then the safety rotating frame 29 is rotated, so that the corresponding rotating rod 25 is driven to rotate, the first rotating plate 21, the second rotating plate 22 or the third rotating plate 23 rotates to the horizontal state from the vertical state, so that the materials flow through the first rotating plate 21, the second rotating plate 22 or the third rotating plate 23, the aim of controlling the flowing proportion of materials is achieved, then the safety rotating frame 29 is loosened, the slide block 27 is reset under the action of the compression spring 28, the safety rotating frame 29 is clamped and fixed in the corresponding clamping groove 30, after the work is finished, the threaded rod 5 is manually rotated to move upwards, so that the first bottom plate 11 is driven to move upwards until the first bottom plate 11 is located in the second through hole 9, the sealing ring 16 can enhance the sealing performance between the first bottom plate 11 and the fixing frame 10, and therefore the purpose of intercepting is achieved.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a make things convenient for flow valve for hydraulic cylinder of hydraulic control proportion, includes valve body (1), threaded rod (5), mount (10) and second bottom plate (18), its characterized in that: the left side and the right side of the valve body (1) are both provided with mounting holes (2), the threaded rod (5) penetrates through the sleeve (3) and the first through hole (6), the first through hole (6) is arranged on the sleeve frame (7), the sleeve frame (7) is connected with the threaded rod (5) through the connecting rod (8), the bottom of the valve body (1) and the fixing frame (10) are both provided with second through holes (9), the fixing frame (10) is fixed in the valve body (1), the sleeve frame (7) and the first bottom plate (11) are arranged in the second through holes (9) on the upper side and the lower side, the upper side of the first bottom plate (11) is fixed with the filter frame (13) through the third bolt (14), the top of the filter frame (13) is clamped and connected to the inner top of the sleeve frame (7), the right side of the fixing frame (10) is provided with the first rotating plate (21), the second rotating plate (22) and the third rotating plate (23), the first rotating plate (21) is arranged on the upper side of the second rotating plate (22), the second rotating plate (22) is arranged on the upper side of the third rotating plate (23), the upper side and the lower side of the second rotating plate (22) are both provided with a fixing plate (24), and the fixed plate (24) is fixed in the valve body (1), the rear side of the first rotating plate (21), the rear side of the second rotating plate (22) and the rear side of the third rotating plate (23) are all fixed with a rotating rod (25), and each rotating rod (25) is internally provided with a sliding chute (26), meanwhile, a slide block (27) and a compression spring (28) are arranged in the sliding groove (26), the slide block (27) is arranged on the front side of the compression spring (28), and the compression spring (28) is wrapped on the outer side of the safety rotating frame (29), the safety rotating frame (29) is fixed on the rear side of the sliding block (27), and the safety rotating frame (29) penetrates through the rear side of the rotating rod (25).
2. The flow valve for a hydraulic oil cylinder convenient for hydraulic control of proportion as claimed in claim 1, wherein: the mounting holes (2) are uniformly distributed on the left side and the right side of the valve body (1).
3. The flow valve for a hydraulic oil cylinder convenient for hydraulic control of proportion as claimed in claim 1, wherein: sleeve (3) are through first bolt (4) threaded connection at the top of valve body (1), and sleeve (3) internal thread connection has threaded rod (5).
4. The flow valve for a hydraulic oil cylinder convenient for hydraulic control of proportion as claimed in claim 1, wherein: the first bottom plate (11) is in threaded connection with the bottom of the threaded rod (5) through a second bolt (12).
5. The flow valve for a hydraulic oil cylinder convenient for hydraulic control of proportion as claimed in claim 1, wherein: annular groove (15) have been seted up in the outside of first bottom plate (11), and snap-fit is connected with sealing washer (16) in annular groove (15), and sealing washer (16) pass through fourth bolt (17) threaded connection on first bottom plate (11).
6. The flow valve for a hydraulic oil cylinder convenient for hydraulic control of proportion as claimed in claim 1, wherein: the upper end face of second bottom plate (18) is fixed with ring piece (19), and ring piece (19) block connection is at the lower terminal surface of valve body (1), and second bottom plate (18) pass through fifth bolt (20) threaded connection simultaneously on valve body (1).
7. The flow valve for a hydraulic oil cylinder convenient for hydraulic control of proportion as claimed in claim 1, wherein: the first rotating plate (21), the second rotating plate (22) and the third rotating plate (23) are rotatably connected to the inner side of the valve body (1).
8. The flow valve for a hydraulic oil cylinder convenient for hydraulic control of proportion as claimed in claim 1, wherein: each rotating rod (25) and the sliding block (27) form a telescopic structure through a compression spring (28).
9. The flow valve for a hydraulic oil cylinder convenient for hydraulic control of proportion as claimed in claim 1, wherein: the front end face of the safety rotating frame (29) is connected in the clamping grooves (30) in a clamping mode, the clamping grooves (30) are formed in the rear end face of the valve body (1), and the number of the clamping grooves (30) is four.
10. The flow valve for a hydraulic oil cylinder convenient for hydraulic control of proportion as claimed in claim 1, wherein: the rotary rod (25) is fixed on the rear side of the first rotary plate (21), the rear side of the second rotary plate (22) and the rear side of the third rotary plate (23), the safety rotary frame (29) on the rear side of the first rotary plate (21), the second rotary plate (22) or the third rotary plate (23) is pulled backwards, and then the safety rotary frame (29) is rotated, so that the corresponding rotary rod (25) is driven to rotate, the first rotary plate (21), the second rotary plate (22) or the third rotary plate (23) rotates to a horizontal state from a vertical state, materials flow through the first rotary plate (21), the second rotary plate (22) or the third rotary plate (23), the purpose of controlling the material flow ratio is achieved, then the safety rotary frame (29) is loosened, the sliding block (27) resets under the action of the compression spring (28), and the safety rotary frame (29) is clamped and fixed in the corresponding clamping groove (30) along with the sliding block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910953174.2A CN110725822B (en) | 2019-10-09 | 2019-10-09 | Flow valve for hydraulic oil cylinder convenient for hydraulic control proportion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910953174.2A CN110725822B (en) | 2019-10-09 | 2019-10-09 | Flow valve for hydraulic oil cylinder convenient for hydraulic control proportion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110725822A CN110725822A (en) | 2020-01-24 |
| CN110725822B true CN110725822B (en) | 2021-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910953174.2A Active CN110725822B (en) | 2019-10-09 | 2019-10-09 | Flow valve for hydraulic oil cylinder convenient for hydraulic control proportion |
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| CN (1) | CN110725822B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2777298Y (en) * | 2005-02-04 | 2006-05-03 | 浙江大学 | Integrated intelligent electric valve |
| CN104405896A (en) * | 2014-09-24 | 2015-03-11 | 江苏诚功阀门科技有限公司 | Double-plate type adjusting valve |
| CN108036065A (en) * | 2017-12-19 | 2018-05-15 | 长春汽四环腾达油脂化工有限公司 | A kind of fluid flow directional control valve |
| CN207814605U (en) * | 2018-01-12 | 2018-09-04 | 江苏九龙阀门制造有限公司 | A kind of follow-on butterfly valve |
| CN209385857U (en) * | 2018-12-13 | 2019-09-13 | 江苏荣泉科技发展有限公司 | A kind of round regulating valve facilitating installation |
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