CN203770686U - Novel cone sealing stop valve - Google Patents
Novel cone sealing stop valve Download PDFInfo
- Publication number
- CN203770686U CN203770686U CN201420175876.5U CN201420175876U CN203770686U CN 203770686 U CN203770686 U CN 203770686U CN 201420175876 U CN201420175876 U CN 201420175876U CN 203770686 U CN203770686 U CN 203770686U
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Abstract
The utility model discloses a novel cone sealing stop valve. The novel cone sealing stop valve comprises a valve body, a valve element, a valve rod, a valve sleeve and a hand wheel, wherein the valve sleeve is provided with a cavity for containing the valve element; one end of the valve rod extends into the cavity of the valve sleeve, is connected with the valve element and is provided with a damping hole; the other end of the valve rod is located outside the valve sleeve and connected with the hand wheel; the valve element is made of metal materials; a medium channel for liquid flowing is formed in the valve body. The novel cone sealing stop valve further comprises a valve seat, the valve seat is arranged in the medium channel of the valve body and made of metal materials, and the valve seat is in sealed connection with the valve element and is matched with the valve element so as to control the medium channel to be circulated or blocked. According to the novel cone sealing stop valve, as the valve seat is arranged in the valve body and is in sealed connection with the valve element to control the medium channel in the valve body to be circulated or blocked, corresponding heat processing for sealed connection between the valve body and the valve element is not required, machining processes are simplified, and production efficiency is improved.
Description
Technical field
The utility model relates to the stop valve in coal mine hydraulic supporting oil hydraulic circuit, and specifically, the utility model relates to a kind of Novel conical surface sealed stop valve.
Background technique
Conical surface stop valve is the one of stop valve, is widely used in the oil hydraulic circuit of coal mine fully-mechanized mining working hydraulic support.The structure of at present conventional conical surface stop valve as shown in figure 11, it comprises valve body 1, spool 2, swivel nut 3, valve pocket 4, valve rod 5, handwheel 6 and damping hole 7, the end that valve pocket 4 inserts in valve body 1 is provided with the cavity that holds spool 2, in the cavity of valve rod 5 one end insertion valve pockets 4, be connected with spool by swivel nut 3, swivel nut 3 is the ends that are enclosed within valve rod 5, swivel nut 3 is with spool 2 and for being threaded, and the other end of valve rod 5 is connected with handwheel 6.The valve rod 5 of the stop valve of this structure is to be connected with spool 2 by swivel nut 3, linkage structure complexity, trouble is installed, manufacturing efficiency is low, and make because spool 2 adopts metal material, realizing between valve body 1 is hard sealing, valve body 1 will pass through corresponding heat treatment process, cause processing technology complexity, manufacturing efficiency is low.
Model utility content
The utility model provides a kind of Novel conical surface sealed stop valve, and object is simplified processing process, enhances productivity.
In order to solve the problems of the technologies described above, the technological scheme that the utility model adopts is: a kind of Novel conical surface sealed stop valve, comprise valve body, spool, valve rod, valve pocket and handwheel, valve pocket is provided with the cavity that holds spool, valve rod one end is goed deep into being connected with spool and being provided with damping hole at this end in the cavity of valve pocket, the valve rod the other end is connected with handwheel outside valve pocket, spool adopts metal material to make, in valve body, be provided with the medium channel for liquid communication, described cone sealing stop valve also comprises in the medium channel that is located at described valve body and the valve seat that adopts metal material to make, valve seat is arranged to be connected with described seal spool and match with spool for control media passage break-make.
One end of described valve seat is threaded with described valve pocket, the other end embeds in the step hole arranging in the medium channel of described valve body, in valve seat, be provided with the cavity for holding described spool, in valve seat cavity, be provided with the arc surface that is tightly connected with the sealing surface of spool and contacts for line, the liquid pass hole that valve seat cavity arranges by valve seat end face is communicated with described medium channel, and the sidepiece of valve seat is also provided with and allows the liquid pass hole of liquid communication.
The end of described valve rod is inserted in the shrinkage pool arranging on the end face of described spool and is connected with spool, and valve rod end is provided with external thread section, starts to be provided with successively vertically internal thread segment and for holding the unthreaded hole section of valve rod external thread section in shrinkage pool from aperture.
The aperture of described unthreaded hole section is greater than the internal diameter of described internal thread segment, and the external diameter of described external thread section equates with the external diameter of internal thread segment.
The end of described valve rod is provided with adjacent with described external thread section and is arranged in the optical axis section of described internal thread segment, and the diameter of optical axis section equates with the internal diameter of external thread section.
Described damping hole is the side that starts to extend in valve rod inside described optical axis section from the end face center of described valve rod.
The center of described spool is provided with the center hole that is communicated with described damping hole and described body cavity.
The center hole of described spool comprises the axial aperture that starts to set gradually vertically from described shrinkage pool inner bottom surface and the axial macropore larger than the aperture of axial aperture.
Described handwheel is provided with the sheath for surround valve pocket outward at described valve pocket.
The center of described handwheel is provided with the cubic hole for being connected with described valve rod.
Cone sealing stop valve of the present utility model, by a valve seat is set in valve body, the break-make of the medium channel of valve seat in being connected control valve body with seal spool, therefore valve body can not need to carry out corresponding heat treatment process in order to be connected with seal spool, thereby simplify processing technology, improved manufacturing efficiency.
Brief description of the drawings
Fig. 1 is the sectional view of stop valve of the present utility model;
Fig. 2 is the enlarged view at A place in Fig. 1;
Fig. 3 is the enlarged view at B place in figure;
Fig. 4 is the sectional view of valve rod;
Fig. 5 is the sectional view of spool;
Fig. 6 is the sectional view of handwheel;
Fig. 7 is the plan view of handwheel;
Fig. 8 is the sectional view of valve pocket;
Fig. 9 is the sectional view of valve seat;
Figure 10 is the sectional view of valve body;
Figure 11 is the structural representation of the stop valve in background technique;
Mark in above-mentioned figure is: 1, valve body; 11, medium channel; 12, step hole; 13, the first working hole; 14, the second working hole; 15, the 3rd working hole; 16, the 4th working hole; 2, spool; 21, the first internal thread segment; 22, the first unthreaded hole section; 23, axial aperture; 24, axial macropore; 25, sealing surface; 3, swivel nut; 4, valve pocket; 41, the first cavity; 42, the second internal thread segment; 43, the second unthreaded hole section; 44, extension; 5, valve rod; 51, the first external thread section; 52, primary optic axis section; 53, the second external thread section; 54, square shaft section; 55, the second optical axis section; 6, handwheel; 61, sheath; 62, cubic hole; 7, damping hole; 8, valve seat; 81, the second cavity; 82, upper shed; 83, lower liquid pass hole; 84, side liquid pass hole; 85, arc surface.
Embodiment
As shown in Figures 1 to 10, a kind of Novel conical surface sealed stop valve of the utility model, comprise valve body 1, spool 2, valve rod 5, valve pocket 4 and handwheel 6, valve body 1 inside center is provided with the medium channel 11 for liquid communication, in valve body 1, be also provided with four working holes for connecting connection-peg, be respectively the first working hole 13, the second working hole 14, the 3rd working hole 15 and the 4th working hole 16, the first working hole 13 is on two of valve body 1 relative sides, to extend to form towards valve body 1 inside respectively with the second working hole 14, the first working hole 13 and the second working hole 14 are symmetrically distributed in the both sides of medium channel 11, the position of the first working hole 13 and the second working hole 14 and coaxial and these two working holes is near the upper end of valve body 1.The 3rd working hole 15 and the second working hole 14 are positioned on the same side of valve body 1, the 4th working hole 16 and the first working hole 13 are positioned on the same side of valve body 1, the 3rd working hole 15 and the 4th working hole 16 are symmetrically distributed in the both sides of medium channel 11, and the position of the 3rd working hole 15 and the 4th working hole 16 and coaxial and these two working holes is near the lower end of valve body 1.Valve pocket 4 one end are inserted in valve body 1 and are threaded with valve body 1, the end face that is positioned at valve body 1 of valve pocket 4 is provided with circle the first cavity 41 for holding spool 2, valve rod 5 one end are goed deep into being connected with spool 2 and being provided with damping hole 7 at this end in the first cavity 41 of valve pocket 4, and valve rod 5 the other ends are connected with handwheel 6 outside valve pocket 4.Spool 2 adopts metal material to make, and the sealing surface 25 of spool 2 is the conical surface.In this cone sealing stop valve, also comprise in the medium channel 11 that is located at valve body 1 and the valve seat 8 that adopts metal material to make, valve seat 8 is arranged to be connected with seal spool and match with spool for control media passage 11 break-makes.Because valve body 1 is no longer direct and spool is connected and sealed, therefore valve body 1 also just need to not carry out corresponding heat treatment process in order to meet hard seal request, only need heat-treat processing to valve seat 8, therefore can simplify valve body 1 structure, simplified processing process, enhances productivity.
Specifically, the material of spool and valve seat 8 is Cr12MoV, with respect to the sealing of softwood matter, adopts sealing firmly, and stop valve is good seal performance not only, also ability ultrahigh pressure, long service life.
Valve seat 8 external shape are cylindrical, the upper end of valve seat 8 is threaded with valve pocket, and the lower end that valve pocket inserts in valve body 1 is provided with an extension, and this extension is annular, inner wall surface thereof is provided with the internal thread being connected with valve seat 8, the corresponding outside thread that is provided with of valve seat 8 upper end outer side surface.In valve seat 8, start from upper-end surface to extend to form towards valve seat 8 inside vertically for holding the second circular cavity 81 of spool, the corresponding upper-end surface at valve seat 8 is formed with the upper shed 82 that allows spool insert, the second cavity 81 is communicated with the first cavity 41 by this upper shed 82, thereby spool 2 can be moved up and down in the first cavity 41 and the second cavity 81.In the step hole 12 of the medium channel 11 interior settings of the lower end embedding valve body 1 of valve seat 8, position, the external diameter equal and opposite in direction of the aperture of this step hole 12 and valve seat 8, between valve seat 8 and step hole 12 inwalls, also accompany O RunddichtringO, O RunddichtringO is enclosed within the annular groove of valve seat 8 outer walls settings, O RunddichtringO can improve the sealing between valve seat 8 and valve body 1, prevents leak of liquid.The lower end surface of valve seat 8 is provided with the lower liquid pass hole 83 for being communicated with the second cavity 81 and the medium channel 11 of valve seat 8 below parts, and lower liquid pass hole 83 is manhole, spool can control by movement in the second cavity 81 under the switching of liquid pass hole 83.In the second cavity 81, process an arc surface 85 at the inner orifice place of lower liquid pass hole 83, form a fillet at inner orifice, this arc surface 85 is line contact while contact with the sealing surface of spool, thereby forms the sealing configuration between valve seat 8 and spool.Valve seat 8 is between the first working hole 13 and the second working hole 14 in valve body 1 inside, the corresponding circumferential side portion at valve seat 8 is provided with and allows the side liquid pass hole 84 of liquid communication, as shown in the figure, valve seat 8 sidepieces are along the circumferential direction evenly equipped with four side liquid pass holes 84, side liquid pass hole 84 is for radially running through the through hole of valve seat 8 sidewalls, the position of valve seat 8 will guarantee that two coaxial side liquid pass holes 84 are respectively with the first working hole 13 of both sides with the second working hole 14 is communicated with and coaxially, side liquid pass hole 84 can be guaranteed the first working hole 13, the second working hole 14 is communicated with the second cavity 81 of valve seat 8, in the time that spool moves Open valve, side liquid pass hole 84, lower liquid pass hole 83 makes medium channel 11 and the second cavity 81, the first working hole 13, the second working hole 14 is communicated with.
As shown in the figure, the end of valve rod 5 is directly to insert in the shrinkage pool arranging on the end face of spool 2 to be connected with spool 2, valve rod 5 ends are provided with the first external thread section 51, start to be provided with successively vertically for allowing the first internal thread segment 21 that valve rod 5 first external thread section 51 coils cross and for holding the first unthreaded hole section 22 of valve rod 5 first external thread sections 51 in shrinkage pool from aperture.The wall at the first unthreaded hole section 22 places does not arrange screw thread, valve rod 5 end the first external thread sections 51 match with the first internal thread segment 21 in shrinkage pool, after valve rod 5 end the first external thread sections 51 are screwed in the first unthreaded hole section 22, no longer be threaded with the first internal thread segment 21, and first internal thread segment 21 can play position-limiting action, can prevent that valve rod 5 first external thread sections 51 from coming off from shrinkage pool, guarantee that valve rod 5 can pull spool 2 to move.In the time of needs Open valve, rotate handwheel 6 valve rod 5 is rotated, valve rod 5 can pull spool 2 to move, thereby can realize the unlatching of valve.
Shrinkage pool is to arrange at spool 2 end face centers, and the aperture of the first unthreaded hole section 22 is greater than the internal diameter of the first internal thread segment 21, and is greater than the external diameter of the first internal thread segment 21, is convex shape thereby make the sectional shape of shrinkage pool.The external diameter of the first external thread section 51 of valve rod 5 ends equates with the external diameter of the first internal thread segment 21, thereby can make first internal thread segment 21 of valve rod 5 end convolution through shrinkage pool, until insert in shrinkage pool.
The end of valve rod 5 is also provided with adjacent with the first external thread section 51 and is arranged in the primary optic axis section 52 of the first internal thread segment 21, primary optic axis section 52 surfaces do not arrange outside thread, the diameter of primary optic axis section 52 equates with the internal diameter of the first external thread section 51, to guarantee that valve rod 5 ends can insert in shrinkage pool.
Damping hole 7 on valve rod 5 starts to extend in valve rod 5 inside the side of primary optic axis section 52 for insert the end face center of the end shrinkage pool from valve rod 5, at an opening of the each formation in valve rod 5 end face centers and side, damping hole 7 entirety are L shaped, comprise along valve rod 5 axially extended one section and radially extend one section.
For the first cavity 41 that makes valve pocket 4 is communicated with valve body 1 inner chamber, the center of spool 2 is provided with the center hole that is communicated with damping hole 7 and valve body 1 inner chamber, and this center hole comprises from spool 2 shrinkage pool inner bottom surfaces and starts the axial aperture 23 that sets gradually towards spool 2 inside vertically and the axial macropore 24 larger than the aperture of axial aperture 23.The aperture of axial aperture 23 equates with the pore size of damping hole 7, and both aperture aligned in position.Axially macropore 24 is the end faces that extend to spool 2 in spool 2 inside and be arranged in valve body 1 inner chamber, forms opening in this end face center.Between macropore 24 and axial aperture 23, be axially conical surface transition in spool 2 inside, water conservancy diversion is effective.Liquid in valve body 1 inner chamber can flow through successively axial macropore 24, axial aperture 23, damping hole 7, because the opening of damping hole 7 on valve rod 5 sides is to be positioned at primary optic axis section 52, primary optic axis section 52 is alignd with shrinkage pool the first internal thread segment 21 again, and the liquid flowing out from damping hole 7 can enter the first cavity 41 of valve pocket 4 through the space between primary optic axis section 52 and the first internal thread segment 21.The center hole of spool 2 is arranged to the structure that comprises axial macropore 24 and axial aperture 23, axial aperture 23 apertures are little, can play the effect of damping, the pressure loss of liquid of axial aperture 23 and damping hole 7 of making to flow through is large, reduce the working pressure that liquid produces valve rod 5 and spool 2, light to guarantee to operate when the opening and closing valve.
Between the part of spool 2 in valve pocket 4 first cavitys 41 and the first cavity 41 inwalls, there is O RunddichtringO, improve the sealing of the first cavity 41.Because this O RunddichtringO can also produce certain stiction to spool 2, thereby can prevent that spool 2 from rotating.
The valve rod 5 of this cone sealing stop valve is to be threaded with valve pocket 4, in valve pocket 4, be provided with the mounting hole that starts to extend to towards valve pocket 4 inside vertically the first cavity 41 from being positioned at end face outside valve body 1, the inwall of this mounting hole is provided with the internal thread starting from valve pocket 4 end face apertures towards extending inward, form the second internal thread segment 42, the corresponding shaft medium position at valve rod 5 is provided with the second external thread section 53, the second external thread section 53 surfaces are provided with outside thread, be connected with the second internal thread segment 42 of mounting hole, the outside thread of the second external thread section 53 and with the external thread rotary of the first external thread section 51 to contrary.This mounting hole also comprises the second unthreaded hole section 43, the second unthreaded hole section 43 is adjacent with the first cavity 41 positions, the inwall of the second unthreaded hole section 43 does not arrange internal thread, the external diameter of the second internal thread segment 42 and larger than the aperture of the second unthreaded hole section 43, thereby be formed with the step surface between the second unthreaded hole section 43 and the second internal thread segment 42 in mounting hole inside, on the shaft of valve rod 5, be provided with the second optical axis section 55, the second optical axis section 55 is between the second external thread section 53 and primary optic axis section 52, the diameter of the second optical axis section 55 equates with the pore size of the second unthreaded hole section 43, internal diameter than the second external thread section 53 is little, the corresponding step surface being formed with on shaft between the second external thread section 53 and the second unthreaded hole section 43, play valve rod 5 is carried out to spacing effect, limit valve rod 5 and be screwed into the degree of depth in valve pocket 4.
Between the second optical axis section 55 of valve rod 5 and the second unthreaded hole section 43, have O RunddichtringO, be provided with the annular groove for holding O RunddichtringO at the inwall of the second unthreaded hole section 43, this O RunddichtringO improves the sealing of the first cavity 41, prevent liquid through valve pocket 4 to outward leakage.
The handwheel 6 of this cone sealing stop valve is provided with for the sheath 61 at the outer encirclement valve pocket 4 of valve pocket 4; sheath 61 is annular; thereby on handwheel 6, form the circular groove that holds valve pocket 4; the internal diameter of this sheath 61 equates with the diameter that valve pocket 4 embeds the position in groove; or be slightly larger than valve pocket 4 and embed the diameter at the position in groove, guarantee that sheath 61 can be enclosed within valve pocket 4 outsides.Sheath 61 is enclosed within valve pocket 4 outsides, has formed a kind of sealing configuration, thereby can prevent that dust from entering valve rod 5 and valve pocket 4 joints, protection valve rod 5.
The center of handwheel 6 is provided with the cubic hole 62 for being connected with valve rod 5, position adjacent with the second external thread section 53 on valve rod 5 is provided with square shaft section 54, the end outside handwheel 6 is also stretched out near valve rod 5 in the position of square shaft section 54, the party's shaft part 54 be shaped as measure-alike square with the cubic hole 62 of handwheel 6 centers, this square shaft section 54 embeds the cubic hole 62 on handwheel 6, then the nut of screwing on of the end outside valve rod 5 stretches out handwheel 6, nut is fastened on handwheel 6 on valve rod 5.Linkage structure between this handwheel 6 and valve rod 5 compared with prior art, have advantages of simple in structure, production and processing is convenient, the square shaft section 54 of valve rod 5 is to insert in the cubic hole 62 of handwheel 6 to be connected with handwheel 6, make the easy to assembly simple of handwheel 6, and be easy to installation and maintenance, operational torque is little, laborsaving.
The aperture of four working holes that are connected with external lug on the valve body 1 of this cone sealing stop valve wants large than the aperture of the cone sealing stop valve of prior art, and the liquid latus rectum excessively of formation is large, makes fluid flow large.The pore size of the first working hole 13 and the second working hole 14 is equal, and the pore size of the 3rd working hole 15 and the 4th working hole 16 equates, the aperture of the 3rd working hole 15, the 4th working hole 16 and larger than the aperture of the first working hole 13, the second working hole 14.
By reference to the accompanying drawings the utility model is exemplarily described above; obviously the utility model specific implementation is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present utility model design and technological scheme carry out; or without improving, design of the present utility model and technological scheme are directly applied to other occasion, all within protection domain of the present utility model.
Claims (10)
1. a Novel conical surface sealed stop valve, comprise valve body, spool, valve rod, valve pocket and handwheel, valve pocket is provided with the cavity that holds spool, valve rod one end is goed deep into being connected with spool and being provided with damping hole at this end in the cavity of valve pocket, the valve rod the other end is connected with handwheel outside valve pocket, spool adopts metal material to make, in valve body, be provided with the medium channel for liquid communication, it is characterized in that: described cone sealing stop valve also comprises in the medium channel that is located at described valve body and the valve seat that adopts metal material to make, valve seat is arranged to be connected with described seal spool and match with spool for control media passage break-make.
2. Novel conical surface sealed stop valve according to claim 1, it is characterized in that: one end of described valve seat is threaded with described valve pocket, the other end embeds in the step hole arranging in the medium channel of described valve body, in valve seat, be provided with the cavity for holding described spool, in valve seat cavity, be provided with the arc surface that is tightly connected with the sealing surface of spool and contacts for line, the liquid pass hole that valve seat cavity arranges by valve seat end face is communicated with described medium channel, and the sidepiece of valve seat is also provided with and allows the liquid pass hole of liquid communication.
3. Novel conical surface sealed stop valve according to claim 1 and 2, it is characterized in that: the end of described valve rod is inserted in the shrinkage pool arranging on the end face of described spool and is connected with spool, valve rod end is provided with external thread section, starts to be provided with successively vertically internal thread segment and for holding the unthreaded hole section of valve rod external thread section in shrinkage pool from aperture.
4. Novel conical surface sealed stop valve according to claim 3, is characterized in that: the aperture of described unthreaded hole section is greater than the internal diameter of described internal thread segment, and the external diameter of described external thread section equates with the external diameter of internal thread segment.
5. Novel conical surface sealed stop valve according to claim 4, is characterized in that: the end of described valve rod is provided with adjacent with described external thread section and is arranged in the optical axis section of described internal thread segment, and the diameter of optical axis section equates with the internal diameter of external thread section.
6. Novel conical surface sealed stop valve according to claim 5, is characterized in that: described damping hole is the side that starts to extend in valve rod inside described optical axis section from the end face center of described valve rod.
7. Novel conical surface sealed stop valve according to claim 6, is characterized in that: the center of described spool is provided with the center hole that is communicated with described damping hole and described body cavity.
8. Novel conical surface sealed stop valve according to claim 7, is characterized in that: the center hole of described spool comprises the axial aperture that starts to set gradually vertically from described shrinkage pool inner bottom surface and the axial macropore larger than the aperture of axial aperture.
9. Novel conical surface sealed stop valve according to claim 8, is characterized in that: described handwheel is provided with the sheath for surround valve pocket outward at described valve pocket.
10. Novel conical surface sealed stop valve according to claim 9, is characterized in that: the center of described handwheel is provided with the cubic hole for being connected with described valve rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420175876.5U CN203770686U (en) | 2014-04-11 | 2014-04-11 | Novel cone sealing stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420175876.5U CN203770686U (en) | 2014-04-11 | 2014-04-11 | Novel cone sealing stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203770686U true CN203770686U (en) | 2014-08-13 |
Family
ID=51287877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420175876.5U Expired - Fee Related CN203770686U (en) | 2014-04-11 | 2014-04-11 | Novel cone sealing stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203770686U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594326A (en) * | 2016-12-29 | 2017-04-26 | 无锡艾迅自动化科技有限公司 | Independently turned on and turned off manifold device |
| CN108869784A (en) * | 2018-06-27 | 2018-11-23 | 阳雷鸣 | One kind opening pull-type diaphragm valve fastly |
| CN114263749A (en) * | 2021-12-28 | 2022-04-01 | 无锡斯考尔自动控制设备有限公司 | Erosion-resistant balanced regulating valve |
-
2014
- 2014-04-11 CN CN201420175876.5U patent/CN203770686U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594326A (en) * | 2016-12-29 | 2017-04-26 | 无锡艾迅自动化科技有限公司 | Independently turned on and turned off manifold device |
| CN108869784A (en) * | 2018-06-27 | 2018-11-23 | 阳雷鸣 | One kind opening pull-type diaphragm valve fastly |
| CN114263749A (en) * | 2021-12-28 | 2022-04-01 | 无锡斯考尔自动控制设备有限公司 | Erosion-resistant balanced regulating valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171110 Address after: Zhi Zhen Wuhu County in Anhui province Wuhu city Anhui Bay 241000 Wuhu Economic Development Zone Sunshine Road No. 768 building 06 Patentee after: HONGDA INTELLIGENT MACHINERY Co.,Ltd. Address before: 241000 Wuhu County, Anhui Province Machinery Industrial Park, Wuhu Patentee before: JULONG GROUP WUHU XINGLONG HYDRAULIC Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 |
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| CF01 | Termination of patent right due to non-payment of annual fee |