CN102434450B - High-pressure pump and distribution valve thereof - Google Patents
High-pressure pump and distribution valve thereof Download PDFInfo
- Publication number
- CN102434450B CN102434450B CN201110361873.1A CN201110361873A CN102434450B CN 102434450 B CN102434450 B CN 102434450B CN 201110361873 A CN201110361873 A CN 201110361873A CN 102434450 B CN102434450 B CN 102434450B
- Authority
- CN
- China
- Prior art keywords
- cavity
- communicated
- plate
- spool
- resorption
- 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.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/12—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B7/00—Piston machines or pumps characterised by having positively-driven valving
- F04B7/0003—Piston machines or pumps characterised by having positively-driven valving the distribution member forming both the inlet and discharge distributor for one single pumping chamber
- F04B7/0011—Piston machines or pumps characterised by having positively-driven valving the distribution member forming both the inlet and discharge distributor for one single pumping chamber and having an oscillating movement
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention discloses a distribution valve, which comprises an upper valve body (2) provided with an upper cavity (21), a lower valve body (3) provided with a lower cavity (31) and a middle partition board (4). The upper cavity (21) is communicated with a medium inlet (22), and the lower cavity (31) is communicated with a medium outlet (32). When a valve core (5) rotates clockwise or anticlockwise, one group of a first cavity body (211) and the medium inlet (22), and a third cavity body (311) and the medium outlet (32) is communicated, and the other group is not communicated; and one group of a second cavity body (212) and the medium inlet (22) and a fourth cavity body (311) and the medium outlet (32) is communicated, and the other group is not communicated. The structural design of the distribution valve can achieve continuous pumping of fluid media including water and the like under the driving of outer force, and reversing time is short, thereby being capable of avoiding cutoff. In addition, the invention further discloses a high-pressure pump including the distribution valve.
Description
Technical field
The present invention relates to high-pressure service pump technical field, particularly a kind of distributing valve.In addition, the invention still further relates to a kind of high-pressure service pump that comprises this kind of distributing valve.
Background technique
Along with, high level or skyscraper fire accident take place frequently in recent years, also increasing for the demand of high-pressure water pump or ultrahigh pressure water pump.
Fire service pump of the prior art generally comprises two types, and a kind of is centrifugal class water pump, and the restriction but this kind of water pump is stressed cannot meet high-rise or high-rise fire-fighting fire extinguishing demand; Another kind is plunger class water pump, but this kind of water pump is subject to flow restriction, also cannot meet high-rise or high-rise fire-fighting fire extinguishing demand.
When adopting biserial plunger type water pump to carry out the operation of pump water, be subject to the restriction of turn around time, such valve pump water continuity is not high, normal " cutout " phenomenon that occurs; Meanwhile, each component under high pressure seal more difficult.
In view of this, how to provide a kind of high-pressure service pump distributing valve, the structural design of this kind of distributing valve can realize the uninterrupted pumping of the media such as water, and turn around time is shorter, thereby avoids occurring cutout phenomenon, is the problem that those skilled in the art need solution badly.
Summary of the invention
The technical problem to be solved in the present invention is for a kind of distributing valve is provided, and the structural design of this distributing valve externally can realize the uninterrupted pumping of the media such as water under the driving of power, and turn around time is shorter, thus the generation of the phenomenon of can avoiding stopping.In addition, another technical problem that will solve of the present invention is for providing a kind of high-pressure service pump that comprises this distributing valve.
For solving the problems of the technologies described above, the invention provides a kind of distributing valve, for high-pressure service pump, described high-pressure service pump comprises pumping mechanism;
Described distributing valve comprise be provided with epicoele upper valve body, be provided with the lower valve body of cavity of resorption and isolate the intermediate clapboard of described epicoele and described cavity of resorption; Described epicoele is communicated with medium import, described cavity of resorption be communicated with media outlet and respectively with two of described pumping mechanism first interface and the second interfaces of carrying cylinder to be communicated with;
Described distributing valve also comprises rotatable and is connected in series vertically the spool of described upper valve body and described lower valve body, and described spool is divided into described epicoele with described medium import and selects first cavity being communicated with and the second cavity and with the cavity of resorption dividing plate in described cavity of resorption, described cavity of resorption be divided into described media outlet and select the 3rd cavity being communicated with and the 4th cavity with the epicoele dividing plate in described epicoele;
Described first interface is communicated with described the 3rd cavity, and described the second interface is communicated with described the 4th cavity; And described intermediate clapboard is provided with and is communicated with the first intercommunicating pore of described the first cavity and described the 3rd cavity and is communicated with described the second cavity and the second intercommunicating pore of described the 4th cavity;
Along with described spool forward, described the first cavity interrupts being communicated with described medium import, and described the 3rd cavity is communicated with described media outlet; Described the second cavity is communicated with described medium import, and described the 4th cavity interrupts being communicated with described media outlet;
Along with described spool reversion, described the first cavity is communicated with described medium import, and described the 3rd cavity interrupts being communicated with described media outlet; Described the second cavity interrupts being communicated with described medium import, and described the 4th cavity is communicated with described media outlet.
Preferably, described spool comprises to be located at the upper sealing panel in described epicoele and to be located at the lower seal plate in described cavity of resorption, described in described upper sealing panel and described epicoele baffle for separating, epicoele is described the first cavity and described the second cavity, and cavity of resorption is described the 3rd cavity and described the 4th cavity described in described lower seal plate and described cavity of resorption baffle for separating.
Preferably, described epicoele dividing plate comprise the upper circular arc plate coaxial with described spool, be connected described upper circular arc plate and described epicoele circumferential side wall upper straight-plate and be located at respectively described upper circular arc plate both sides first sealing bent plate and second sealing bent plate;
Described upper sealing panel comprises the first sealed department and the second sealed department, and along with described spool forward, described the first sealed department is stuck on described the first sealing bent plate to interrupt being communicated with of described the first cavity and described medium import; Along with the reversion of described spool, described the second sealed department is stuck on described the second sealing bent plate to interrupt being communicated with of described the second cavity and described medium import.
Preferably, described spool comprises the rotating shaft of being located in described upper circular arc plate, and described the first sealed department is connected in described rotating shaft by the first curved boom, and described the second sealed department is connected in described rotating shaft by the second curved boom;
Described the first curved boom is stretched out and described the first sealed department be may be stuck on described the first sealing bent plate by the opening of described upper circular arc plate; Described the second curved boom is stretched out and described the second sealed department be may be stuck on described the second sealing bent plate by the opening of described upper circular arc plate.
Preferably, on the roof of epicoele described in the both sides of described upper straight-plate, offer respectively the first seal groove and the second seal groove;
Described the first seal groove offers the first perpendicular step and the first horizontal step aliging with the end face of described the first sealing bent plate, and described the first sealed department is stuck on described the first sealing bent plate, the described first perpendicular step and described the first horizontal step to interrupt being communicated with of described the first cavity and described medium import simultaneously;
Described the second seal groove offers the second perpendicular step and the second horizontal step aliging with the end face of described the second sealing bent plate, and described the second sealed department is stuck on described the second sealing bent plate, the described second perpendicular step and described the second horizontal step to interrupt being communicated with of described the second cavity and described medium import simultaneously.
Preferably, described intermediate clapboard offers three seal groove corresponding with described the first seal groove position and four seal groove corresponding with described the second seal groove position towards the roof of a side of described epicoele; The bottom of described the first sealed department is located in described the 3rd seal groove, and the bottom of described the second sealed department is located in described the 4th seal groove.
Preferably, described cavity of resorption dividing plate comprises the lower circular arc plate coaxial with described spool and is connected the lower straight-plate of the circumferential side wall of described lower circular arc plate and described cavity of resorption;
Described spool comprises the rotating shaft of being located in described lower circular arc plate, and described lower seal plate is connected in described rotating shaft and is stretched out by the opening of described lower circular arc plate;
Along with the forward of described spool, described lower seal board on the first end face of described lower circular arc plate to interrupt being communicated with of described the 4th cavity and described media outlet; Along with the reversion of described spool, described lower seal board on the second end face of described lower circular arc plate to interrupt being communicated with of described the 3rd cavity and described media outlet.
Preferably, offer the 5th seal groove on the diapire of described cavity of resorption, described the 5th seal groove offers the four perpendicular step concordant with described the first end face and the 4th horizontal step and five perpendicular step and the five horizontal step concordant with described the second end face;
Along with spool forward, described lower seal plate is stuck on the first end face, the described the 4th perpendicular step and described the 4th horizontal step of described lower circular arc plate simultaneously, to interrupt being communicated with of described the 4th cavity and described media outlet; Along with the reversion of described spool, described lower seal plate is stuck on the second end face, the described the 5th perpendicular step and described the 5th horizontal step of described lower circular arc plate simultaneously, to interrupt being communicated with of described the 3rd cavity and described media outlet.
Preferably, described intermediate clapboard offers six seal groove corresponding with described the 5th seal groove position towards the diapire of a side of described cavity of resorption, and described lower seal Ban is located at upper end portion in described the 6th seal groove.
In addition,, for solving the problems of the technologies described above, the present invention also provides a kind of high-pressure service pump, comprises pumping mechanism; Described high-pressure service pump also comprises the distributing valve described in above-mentioned any one, and described first interface and described the second interface are communicated with two conveying cylinders of described pumping mechanism respectively.
During work, spool forward, in the epicoele of upper valve body, spool interrupts the first cavity and medium import to be communicated with, and makes the second cavity be communicated with medium import simultaneously; In the cavity of resorption of lower valve body, spool makes the 4th cavity and media outlet interrupt being communicated with, and makes the 3rd cavity be communicated with media outlet simultaneously, and in this cavity of resorption, first interface is communicated with the 3rd cavity simultaneously, and the second interface is communicated with the 4th cavity.
On the basis of above-mentioned connectivity structure, the piston in the conveying cylinder being communicated with the second interface retreats, and correspondingly, the 4th cavity forms low-pressure cavity; Putting before this, because the second cavity is communicated with medium import, and second cavity be communicated with by the second intercommunicating pore with the 4th cavity, thereby water or other media (being referred to as below medium) enter in the second cavity by medium import, and then by the second intercommunicating pore, enter in the 4th cavity the medium in the 4th cavity and then enter and carry in cylinder by the second interface.Simultaneously, piston-advance in the conveying cylinder being communicated with first interface, thereby medium is pushed in the 3rd cavity, now because the first cavity being communicated with by the first intercommunicating pore with the 3rd cavity and medium import are interrupted being communicated with, thereby the media outlet discharge that is communicated with the 3rd cavity thus time of the medium in the 3rd cavity.In sum, in this process, the second cavity and the 4th cavity and carry accordingly cylinder to carry out the operation of absorbing medium, and the first cavity and the 3rd cavity and carry accordingly cylinder to carry out the operation of pumped medium.
When spool reverses, in the epicoele of upper valve body, spool is communicated with the first cavity with medium import, and makes the second cavity and medium import interrupt being communicated with simultaneously; In the cavity of resorption of lower valve body, spool makes the 4th cavity be communicated with media outlet, and makes the 3rd cavity and media outlet interrupt being communicated with simultaneously, and in this cavity of resorption, first interface is communicated with the 3rd cavity simultaneously, and the second interface is communicated with the 4th cavity.In this connectivity structure, the second cavity and the 4th cavity and carry accordingly cylinder to carry out the operation of pumped medium, and the first cavity and the 3rd cavity and carry accordingly cylinder to carry out the operation of absorbing medium, its detailed process is contrary with said process, does not repeat them here.Carry cylinders leapfrog and retreat along with two of pumping mechanism, the first cavity and the 3rd cavity and the second cavity and the 4th cavity are alternately carried out absorbing medium action and pumped medium action, thereby have realized the uninterrupted pumping of medium.
In addition, the swing of spool can be driven by swinging mechaism, and its pendulum angle can be less, thereby turn around time is shorter, the generation of the phenomenon of can avoiding stopping.
In sum, distributing valve provided by the present invention, under two of pump structure drivings of carrying cylinders, can realize the uninterrupted pumping of medium, and turn around time is shorter, thus the generation of the phenomenon of can avoiding stopping.
In addition, the high-pressure service pump that comprises above-mentioned distributing valve provided by the present invention, its technique effect is identical with the technique effect of above-mentioned distributing valve, does not repeat them here.
Accompanying drawing explanation
Fig. 1 is the plan view that an embodiment of the present invention distributing valve is cut open along upper valve body;
Fig. 2 is the plan view that an embodiment of the present invention distributing valve is cut open along lower valve body;
Fig. 3 is the structural representation of the spool of distributing valve in Fig. 1 and Fig. 2;
Fig. 3-1 is the plan view of spool in Fig. 3;
Fig. 4 is the structural representation of the upper valve body of distributing valve in Fig. 1 and Fig. 2;
Fig. 4-1 is the worm's eye view of upper valve body in Fig. 4;
Fig. 5 is the structural representation of the intermediate clapboard of distributing valve in Fig. 1 and Fig. 2;
Fig. 5-1 is that intermediate clapboard in Fig. 5 is towards the view of a side of described upper valve body;
Fig. 5-2 are that intermediate clapboard in Fig. 5 is towards the view of a side of described lower valve body;
Fig. 6 is the structural representation of the lower valve body of distributing valve in Fig. 1 and Fig. 2;
Fig. 6-1 is the plan view of lower valve body in Fig. 6;
Fig. 7 is the overall structure figure of distributing valve in an embodiment of the present invention;
Fig. 8 is the explosive decomposition figure of distributing valve in Fig. 7;
Fig. 9 is an embodiment of the present invention mesohigh pump structure schematic diagram;
Figure 10 is the structural representation of the one-way valve of Fig. 9 mesohigh pump.
Wherein, in Fig. 1 to Figure 10, the corresponding relation between reference character and component names is:
1 pumping mechanism; 11 carry cylinder;
2 upper valve bodies; 21 epicoeles; 211 first cavitys; 212 second cavitys; 22 medium imports; 23 epicoele dividing plates; Circular arc plate on 231; 232 upper straight-plates; 233 first sealing bent plates; 234 second sealing bent plates; 24 first seal grooves; 241 first perpendicular steps; 242 first horizontal steps; 25 second seal grooves; 251 second perpendicular steps; 252 second horizontal steps;
3 times valve bodies; 31 cavity of resorptions; 311 the 3rd cavitys; 312 the 4th cavitys; 32 media outlets; 33 first interfaces; 34 second interfaces; 35 cavity of resorption dividing plates; 351 times circular arc plates; 351a the first end face; 351b the second end face; 352 lower straight-plates; 36 the 5th seal grooves; 361 the 4th perpendicular steps; 362 the 4th horizontal steps; 363 the 5th perpendicular steps; 364 the 5th horizontal steps;
4 intermediate clapboards; 41 first intercommunicating pores; 42 second intercommunicating pores; 43 the 3rd seal grooves; 44 the 4th seal grooves; 45 the 6th seal grooves;
5 spools; 51 upper sealing panels; 511 first sealed departments; 512 second sealed departments; 52 lower seal plates; 53 rotating shafts; 541 first curved booms; 542 second curved booms;
6 swing mechanisms;
7 distributing valves;
8 one-way valves.
Embodiment
Core of the present invention is for a kind of distributing valve is provided, and the structural design of this distributing valve externally can realize the uninterrupted pumping of the media such as water under the driving of power, and turn around time is shorter, thus the generation of the phenomenon of can avoiding stopping.In addition, another core of the present invention is for providing a kind of high-pressure service pump that comprises this distributing valve.
In order to make those skilled in the art understand better technological scheme of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the plan view that an embodiment of the present invention distributing valve is cut open along upper valve body; Fig. 2 is the plan view that an embodiment of the present invention distributing valve is cut open along lower valve body.
In one embodiment, distributing valve provided by the present invention, for high-pressure service pump, high-pressure service pump comprises pumping mechanism 1; Described distributing valve comprises the intermediate clapboard 4 that is provided with the upper valve body 2 of epicoele 21, the lower valve body 3 that is provided with cavity of resorption 31 and isolation epicoele 21 and cavity of resorption 31; Epicoele 21 is communicated with medium import 22, cavity of resorption 31 be communicated with media outlet 32 and respectively with two of pumping mechanism 1 first interface 33 and the second interfaces 34 of carrying cylinder 11 to be communicated with;
Described distributing valve also comprises rotatable and is connected in series vertically the spool 5 of upper valve body 2 and lower valve body 3, and spool 5 is divided into epicoele 21 with medium import 22 and selects first cavity 211 being communicated with and the second cavity 212 and with the cavity of resorption dividing plate 35 in cavity of resorption 31, cavity of resorption 31 be divided into media outlet 32 and select the 3rd cavity 311 being communicated with and the 4th cavity 312 with the epicoele dividing plate 23 in epicoele 21; It should be noted that, the implication of selecting a connection is: one is communicated with, and another one interrupts being communicated with.
Along with spool 5 forward or reverse, the first cavity 211 with in medium import 22 and 32 liang of groups of the 3rd cavity 311 and media outlet one group be communicated with, another group interrupt to be communicated with; The second cavity 212 with in medium import 22 and 32 liang of groups of the 4th cavity 312 and media outlet one group be communicated with, another group interrupt to be communicated with.
During work, spool 5 forwards (turning clockwise), as shown in Figure 1, in the epicoele 21 of upper valve body 2, spool 5 interrupts the first cavity 211 to be communicated with medium import 22, and makes the second cavity 212 be communicated with medium import 22 simultaneously; As shown in Figure 2, in the cavity of resorption 31 of lower valve body 3, spool 5 makes the 4th cavity 312 interrupt being communicated with media outlet 32, and make the 3rd cavity 311 be communicated with media outlet 32 simultaneously, simultaneously in this cavity of resorption 31, first interface 33 is communicated with the 3rd cavity 311, and the second interface 34 is communicated with the 4th cavity 312.
On the basis of above-mentioned connectivity structure, as shown in Figure 2, the piston in the conveying cylinder 11 being communicated with the second interface 34 retreats, and correspondingly, the 4th cavity 312 forms low-pressure cavity; Putting before this, as shown in Figure 1, because the second cavity 212 is communicated with medium import 22, and second cavity 212 be communicated with by the second intercommunicating pore 42 with the 4th cavity 312, thereby water or other media (being referred to as below medium) enter in the second cavity 212 by medium import 22, and then by the second intercommunicating pore 42, enter in the 4th cavity 312 medium in the 4th cavity 312 and then enter and carry in cylinder 11 by the second interface 34.Simultaneously, as shown in Figure 2, piston-advance in the conveying cylinder 11 being communicated with first interface 33, thereby medium is pushed in the 3rd cavity 311, as shown in Figure 1, now because the first cavity 211 being communicated with by the first intercommunicating pore 41 with the 3rd cavity 311 and medium import 22 interrupted being communicated with, thereby media outlet 32 discharges that are all communicated with the 3rd cavity 311 thus time of the medium in the 3rd cavity 311.In sum, in said process, the second cavity 212 and the 4th cavity 312 and carry accordingly cylinder 11 to carry out the operation of absorbing mediums, and the first cavity 211 and the 3rd cavity 311 and carry accordingly cylinder 11 to carry out the operation of pumped medium.
When spool 5 reversion (being rotated counterclockwise), in the epicoele 21 of upper valve body 2, spool 5 is communicated with the first cavity 211 with medium import 22, and makes the second cavity 212 interrupt being communicated with medium import 22 simultaneously; In the cavity of resorption 31 of lower valve body 3, spool 5 makes the 4th cavity 312 be communicated with media outlet 32, and makes the 3rd cavity 311 interrupt being communicated with media outlet 32 simultaneously, simultaneously in this cavity of resorption 31, first interface 33 is communicated with the 3rd cavity 311, and the second interface 34 is communicated with the 4th cavity 312.In this connectivity structure, the second cavity 212 and the 4th cavity 312 and carry accordingly cylinder 11 to carry out the operation of pumped medium, and the first cavity 211 and the 3rd cavity 311 and carry accordingly cylinder 11 to carry out the operation of absorbing mediums, its detailed process is contrary with said process, does not repeat them here.Carry cylinders 11 leapfrog and retreat along with two of pumping mechanism 1, the first cavity 211 and the 3rd cavity 311 and the second cavity 212 and the 4th cavity 312 are alternately carried out absorbing medium action and pumped medium action, thereby have realized the uninterrupted pumping of medium.
In addition, the swing of spool 5 can be driven by swinging mechaism 6, and its pendulum angle can be less, thereby turn around time is shorter, the generation of the phenomenon of can avoiding stopping.
In technique scheme, can make design to the concrete structure of spool.Particularly, please also refer to Fig. 1, Fig. 2, Fig. 3 and Fig. 3-1, Fig. 3 is the structural representation of the spool of distributing valve in Fig. 1 and Fig. 2; Fig. 3-1 is the plan view of spool in Fig. 3.
Particularly, as shown in Fig. 3 and Fig. 3-1, spool 5 comprises the upper sealing panel 51 of being located in epicoele 21 and is located at the lower seal plate 52 in cavity of resorption 31; As shown in Figure 1, upper sealing panel 51 is the first cavity 211 and the second cavity 212 with epicoele dividing plate 23 separation epicoeles 21; As shown in Figure 2, lower seal plate 52 is the 3rd cavity 311 and the 4th cavity 312 with cavity of resorption dividing plate 35 separation cavity of resorptions 31.Along with the rotation of spool 5, upper sealing panel 51 and lower seal plate 52 rotate thereupon, thereby corresponding cavity are communicated with corresponding medium import 22 or media outlet 32 or interrupt being communicated with.
In technique scheme, can also make specific design to epicoele dividing plate 23.Such as, please refer to Fig. 4 and Fig. 4-1, Fig. 4 is the structural representation of the upper valve body of distributing valve in Fig. 1 and Fig. 2; Fig. 4-1 is the worm's eye view of upper valve body in Fig. 4.
As shown in Figure 4, epicoele dividing plate 23 comprise the upper circular arc plate 231 coaxial with spool 5, be connected circular arc plate 231 and epicoele 31 circumferential side wall upper straight-plate 232 and be located at respectively upper circular arc plate 231 both sides first sealing bent plate 233 and second sealing bent plate 234.As shown in Figure 3, upper sealing panel 51 comprises the first sealed department 511 and the second sealed department 512.
On the basis of said structure design, as shown in Figure 1, along with spool 5 forwards, the first sealed department 511 is stuck on the first sealing bent plate 233, to interrupt being communicated with of the first cavity 211 and medium import 22, by the first cavity 211 sealings, make the second cavity 212 be communicated with medium import 22 simultaneously; As shown in Figure 1, when spool 5 reversion, the second sealed department 512 is stuck on the second sealing bent plate 234, to interrupt being communicated with of the second cavity 212 and medium import 22, thereby the second cavity 212 is sealed, and makes the first cavity 211 be communicated with medium import 22 simultaneously.Said structure design makes medium import 22 select one with the first cavity 211 and the second cavity 212 to be communicated with easily, and structure is comparatively simple, and manufacture cost is lower.
Further, as shown in Fig. 3 and Fig. 3-1, spool 5 comprises that rotating shaft 53, the first sealed departments 511 of being located in circular arc plate 231 are connected in rotating shaft 53 by the first curved boom 541, and the second sealed department 512 is connected in rotating shaft 53 by the second curved boom 542; On the basis of this structure, as shown in Figure 1, when spool 5 forward, the first curved boom 541 is stretched out and the first sealed department 511 be may be stuck on the first sealing bent plate 233 by the opening of upper circular arc plate 231; When spool 5 reversion, the second curved boom 542 is stretched out and the second sealed department 512 be may be stuck on the second sealing bent plate 234 by the opening of upper circular arc plate 231.The first curved boom 541 structural designs make the first sealed department 511 relative with the first sealing bent plate 233 positions easily, and then this first sealed department 511 be may be stuck on the first sealing bent plate 233, thereby realize the object of the first cavity 211 sealings.The second curved boom 542 structural designs make the second sealed department 512 relative with the second sealing bent plate 234 positions easily, and then this second sealed department 512 be may be stuck on the second sealing bent plate 234, thereby realize the object of the second cavity 212 sealings.
In addition, in said structure design, as shown in Figure 1, when the first sealed department 511 is stuck on the first sealing bent plate 233, because medium has been full of the first cavity 211, pressure medium in the first cavity 211 can further make the first sealed department 511 be pressed on the first sealing bent plate 233, thereby has guaranteed the sealing effect between the first sealed department 511 and the first sealing bent plate 233.
In the above-described embodiments, can also make further improvement to upper valve body 2.Such as, as shown in Fig. 4 and Fig. 4-1, on the roof of upper straight-plate 232 both sides epicoele, offer respectively the first seal groove 24 and the second seal groove 25, and the first seal groove 24 offers the first perpendicular step 241 and the first horizontal step 242 aliging with the end face of the first sealing bent plate 233; As shown in Figure 1 and Figure 4, during spool 5 forward, the first sealed department 511 is stuck on the first sealing bent plate 233, the first perpendicular step 241 and the first horizontal step 242 to interrupt being communicated with of the first cavity 211 and medium import simultaneously.This kind of structural design further guaranteed the sealing effect to the first cavity 211.And, because medium has been full of the first cavity 211, pressure medium in the first cavity 211 can further make the first sealed department 511 be pressed on first sealing bent plate the 233, first perpendicular step 241 and the first horizontal step 242, thereby has further guaranteed the sealing effect to the first cavity 211.
Symmetrical with the first seal groove 24, as shown in Fig. 4 and Fig. 4-1, in epicoele 21, also offer the second seal groove 25; And the second seal groove 25 offers the second perpendicular step 251 of aliging with the end face of the second sealing bent plate 234 and the second horizontal step 252, the second sealed departments 512 and is stuck on second sealing bent plate the 234, second perpendicular step 251 and the second horizontal step 252 to interrupt being communicated with of the second cavity 212 and medium import 22 simultaneously.The technique effect of this kind of structural design is identical with the technique effect of said structure, does not repeat them here.
In technique scheme, can also make further improvement to intermediate clapboard.Such as, please refer to Fig. 5, Fig. 5-1 and Fig. 5-2, Fig. 5 is the structural representation of the intermediate clapboard of distributing valve in Fig. 1 and Fig. 2; Fig. 5-1 is that intermediate clapboard in Fig. 5 is towards the view of a side of upper valve body; Fig. 5-2 are that intermediate clapboard in Fig. 5 is towards the view of a side of lower valve body.
As shown in Fig. 5 and Fig. 5-1, intermediate clapboard 4 offers three seal groove 43 corresponding with the first seal groove 24 positions and four seal groove 44 corresponding with the second seal groove 25 positions towards the roof of a side of epicoele 21; The first sealed department 511 bottom is located in the 3rd seal groove 43, and when the first sealed department 511 is stuck on the first sealing bent plate 233, this the first sealed department 511 lower end surface is stuck on the end face of the 3rd seal groove 43, thereby further improves the sealing effect to the first cavity 211.The second sealed department 512 bottom is located in the 4th seal groove 44, and when the second sealed department 512 is stuck on the second sealing bent plate 234, this the second sealed department 512 lower end surface is stuck on the end face of the 4th seal groove 44, thereby further improves the sealing effect to the second cavity 212.
In technique scheme, can also make specific design to cavity of resorption dividing plate 35.Such as, please refer to Fig. 6 and Fig. 6-1, Fig. 6 is the structural representation of the lower valve body of distributing valve in Fig. 1 and Fig. 2; Fig. 6-1 is the plan view of lower valve body in Fig. 6.
Particularly, cavity of resorption dividing plate 35 comprises the lower circular arc plate 351 coaxial with spool 5 and is connected the lower straight-plate 352 of the circumferential side wall of lower circular arc plate 351 and cavity of resorption 31; As shown in Figure 2, spool 5 comprises the rotating shaft 53 of being located in lower circular arc plate 351, and lower seal plate 52 is connected in rotating shaft 53 and is stretched out by the opening of lower circular arc plate 351.
On the basis of said structure, as shown in Figure 2, forward along with spool 5, it is upper to interrupt being communicated with of the 4th cavity 312 and media outlet 32 that lower seal plate 52 is stuck in the first end face 351a of lower circular arc plate 351, make the 4th cavity 312 sealings, make the 3rd cavity 311 be communicated with media outlet 32 simultaneously; Along with spool 5 reversion, lower seal plate 52 is stuck in that the second end face 351b of lower circular arc plate 351 is upper seals the 3rd cavity 311 to interrupt being communicated with of the 3rd cavity 311 and media outlet 32, makes the 4th cavity 312 be communicated with media outlet 32 simultaneously.Said structure design makes media outlet 32 select one with the 3rd time cavity 311 and the 4th cavity 312 to be communicated with easily, and structure is comparatively simple, and manufacture cost is lower.
Further, as shown in Fig. 6 and Fig. 6-1, on the diapire of cavity of resorption 31, offer the 5th seal groove 36, the five seal grooves 36 and offer the four perpendicular step 361 concordant with the first end face 351a and the 4th horizontal step 362 and five perpendicular step 363 and the five horizontal step 364 concordant with the second end face 351b.
On the basis of said structure, as shown in Figure 2, along with spool 5 forwards, lower seal plate 52 is stuck on the first end face 351a, the 4th perpendicular step 361 and the 4th horizontal step 362 of lower circular arc plate 351 simultaneously, to interrupt being communicated with of the 4th cavity 312 and media outlet 32, this kind of structural design can further guarantee the sealing effect of the 4th cavity 312; Along with spool 5 reversions, lower seal plate 52 is stuck on the second end face 351b, the 5th perpendicular step 363 and the 5th horizontal step 364 of lower circular arc plate 351 simultaneously, to interrupt being communicated with of the 3rd cavity 311 and media outlet 32, this kind of structural design can further guarantee the sealing effect of the 3rd cavity 311.
On the basis of said structure, can also make specific design to intermediate clapboard 4.Such as, as shown in Fig. 5 and Fig. 5-2, intermediate clapboard 4 offers six seal groove 45 corresponding with the 5th seal groove 36 positions towards the diapire of a side of cavity of resorption, and lower seal Ban52 is located at upper end portion in the 6th seal groove 45.Instantly sealing plate 52 was stuck in the first end face 351a of lower circular arc plate 351 or the second end face 351b when upper, the top end of lower seal plate 52 is further stuck on the end face of the 6th seal groove 45, thereby further guarantees the sealing effect to the 4th cavity 312 or the 3rd cavity 311.
Finally, please refer to Fig. 7 and Fig. 8, Fig. 7 is the overall structure figure of distributing valve in an embodiment of the present invention; Fig. 8 is the explosive decomposition figure of distributing valve in Fig. 7.
Wherein, the monnolithic case figure of distributing valve can be with reference to Fig. 7, and this distributing valve comprises upper valve body 2 and lower valve body 3, and upper valve body is provided with medium import 22, lower valve body be provided with media outlet 32 and with two first interface 33 and the second interfaces 34 of carrying cylinders.The decomposition texture of this distributing valve can be with reference to Fig. 8.As shown in Figure 8, distributing valve comprises upper valve body 2, lower valve body 3, intermediate clapboard 4 and spool 5, and spool 5 rotates through the cavity of resorption dividing plate 35 in epicoele dividing plate 23, intermediate clapboard 4 and the lower valve body 3 in upper valve body 2, thereby realizes assembling.
In addition, the present invention also provides a kind of high-pressure service pump, specifically please refer to Fig. 9 and Figure 10, and Fig. 9 is an embodiment of the present invention mesohigh pump structure schematic diagram; Figure 10 is the structural representation of the one-way valve of Fig. 9 mesohigh pump.
In one embodiment, as shown in Figure 9, high-pressure service pump comprises pumping mechanism 1; High-pressure service pump also comprises above-mentioned distributing valve 7, and first interface 33 and the second interface 34 are communicated with two conveying cylinders 11 of pumping mechanism 1 respectively.Further, as shown in Figure 9 and Figure 10, the media outlet 32 of distributing valve 7 is connected with one-way valve 8, and this one-way valve 8, in distributing valve 7 commutation processes, can block delivery pipe and distributing valve 7, thereby prevents the medium back flow in delivery pipe.In addition, as shown in Figure 9, this high-pressure service pump also comprises swinging mechaism 6, and this swinging mechaism 6 adopts plunger cases, thereby drives spool 5 forward or reverse, for the commutation of spool 5 provides power.Other parts of high-pressure service pump can, with reference to prior art, no longer be launched herein.
Finally, it should be noted that, the present invention is not restricted the medium in distributing valve and high-pressure service pump, and this kind of medium can be water, can be hydraulic oil, or other is suitable for the medium of pumping yet.
Above a kind of high-pressure service pump provided by the present invention and distributing valve thereof are described in detail.Applied specific case herein principle of the present invention and mode of execution are set forth, above embodiment's explanation is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (10)
1. a distributing valve, for high-pressure service pump, described high-pressure service pump comprises pumping mechanism (1); It is characterized in that,
Described distributing valve comprise be provided with epicoele (21) upper valve body (2), be provided with the lower valve body (3) of cavity of resorption (31) and isolate described epicoele (21) and the intermediate clapboard (4) of described cavity of resorption (31); Described epicoele (21) is communicated with medium import (22), first interface (33) and the second interfaces (34) that described cavity of resorption (31) is communicated with media outlet (32) and is communicated with two conveying cylinders (11) of described pumping mechanism (1) respectively;
Described distributing valve also comprises rotatable and is connected in series vertically the spool (5) of described upper valve body (2) and described lower valve body (3), and described spool (5) and epicoele dividing plate (23) in described epicoele (21) are divided into described epicoele (21) to select first cavity (211) being communicated with and the second cavity (212) and described spool (5) the cavity of resorption dividing plate (35) interior with described cavity of resorption (31) with described medium import (22) described cavity of resorption (31) is divided into described media outlet (32) and selects the 3rd cavity (311) being communicated with and the 4th cavity (312);
Described first interface (33) is communicated with described the 3rd cavity (311), and described the second interface (34) is communicated with described the 4th cavity (312); And described intermediate clapboard (4) is provided with and is communicated with first intercommunicating pore (41) of described the first cavity (211) and described the 3rd cavity (311) and is communicated with described the second cavity (212) and second intercommunicating pore (42) of described the 4th cavity (312);
Along with described spool (5) forward, described the first cavity (211) interrupts being communicated with described medium import (22), and described the 3rd cavity (311) is communicated with described media outlet (32); Described the second cavity (212) is communicated with described medium import (22), and described the 4th cavity (312) interrupts being communicated with described media outlet (32);
Along with described spool reversion, described the first cavity (211) is communicated with described medium import (22), and described the 3rd cavity (311) interrupts being communicated with described media outlet (32); Described the second cavity (212) interrupts being communicated with described medium import (22), and described the 4th cavity (312) is communicated with described media outlet (32).
2. distributing valve as claimed in claim 1, it is characterized in that, described spool (5) comprises the upper sealing panel (51) of being located in described epicoele (21) and is located at the lower seal plate (52) in described cavity of resorption (31), it is described the first cavity (211) and described the second cavity (212) that described upper sealing panel (51) is separated described epicoele (21) with described epicoele dividing plate (23), and it is described the 3rd cavity (311) and described the 4th cavity (312) that described lower seal plate (52) is separated described cavity of resorption (31) with described cavity of resorption dividing plate (35).
3. distributing valve as claimed in claim 2, it is characterized in that, described epicoele dividing plate (23) comprises the upper circular arc plate (231) coaxial with described spool (5), be connected the upper straight-plate (232) of circumferential side wall of described upper circular arc plate (231) and described epicoele (21) and the first sealing bent plate (233) and second of being located at respectively described upper circular arc plate (231) both sides seals bent plate (234);
Described upper sealing panel (51) comprises the first sealed department (511) and the second sealed department (512), along with described spool (5) forward, it is upper to interrupt being communicated with of described the first cavity (211) and described medium import (22) that described the first sealed department (511) is stuck in described the first sealing bent plate (233); Along with described spool (5) reversion, it is upper to interrupt being communicated with of described the second cavity (212) and described medium import (22) that described the second sealed department (512) is stuck in described the second sealing bent plate (234).
4. distributing valve as claimed in claim 3, it is characterized in that, described spool (5) comprises the rotating shaft (53) of being located in described upper circular arc plate (231), it is upper that described the first sealed department (511) is connected in described rotating shaft (53) by the first curved boom (541), and described the second sealed department (512) is connected in described rotating shaft (53) by the second curved boom (542);
Described the first curved boom (541) is stretched out and described the first sealed department (511) be may be stuck on described the first sealing bent plate (233) by the opening of described upper circular arc plate (231); Described the second curved boom (542) is stretched out and described the second sealed department (512) be may be stuck on described the second sealing bent plate (234) by the opening of described upper circular arc plate (231).
5. distributing valve as claimed in claim 3, is characterized in that, offers respectively the first seal groove (24) and the second seal groove (25) on the roof of epicoele (21) described in the both sides of described upper straight-plate (232);
Described the first seal groove (24) offers the first perpendicular step (241) and the first horizontal step (242) align with the end face of described the first sealing bent plate (233), and described the first sealed department (511) is stuck in described the first sealing bent plate (233), described first simultaneously and erects step (241) and described the first horizontal step (242) above to interrupt being communicated with of described the first cavity (211) and described medium import (22);
Described the second seal groove (25) offers the second perpendicular step (251) and the second horizontal step (252) align with the end face of described the second sealing bent plate (234), and described the second sealed department (512) is stuck in described the second sealing bent plate (234), described second simultaneously and erects step (251) and described the second horizontal step (252) above to interrupt being communicated with of described the second cavity (212) and described medium import (22).
6. distributing valve as claimed in claim 5, it is characterized in that, described intermediate clapboard (4) offers three seal groove (43) corresponding with described the first seal groove (24) position and four seal groove (44) corresponding with described the second seal groove (25) position towards the roof of a side of described epicoele (21); The bottom of described the first sealed department (511) is located in described the 3rd seal groove (43), and the bottom of described the second sealed department (512) is located in described the 4th seal groove (44).
7. the distributing valve as described in claim 2 to 6 any one, it is characterized in that, described cavity of resorption dividing plate (35) comprises the lower circular arc plate (351) coaxial with described spool (5) and is connected described lower circular arc plate (351) and the lower straight-plate (352) of the circumferential side wall of described cavity of resorption (31);
Described spool (5) comprises the rotating shaft (53) of being located in described lower circular arc plate (351), and it is upper and stretched out by the opening of described lower circular arc plate (351) that described lower seal plate (52) is connected in described rotating shaft (53);
Along with the forward of described spool (5), it is upper to interrupt being communicated with of described the 4th cavity (312) and described media outlet (32) that described lower seal plate (52) is stuck in first end face (351a) of described lower circular arc plate (351); Along with the reversion of described spool (5), it is upper to interrupt being communicated with of described the 3rd cavity (311) and described media outlet (32) that described lower seal plate (52) is stuck in second end face (351b) of described lower circular arc plate (351).
8. distributing valve as claimed in claim 7, it is characterized in that, on the diapire of described cavity of resorption (31), offer the 5th seal groove (36), described the 5th seal groove (36) offers the four perpendicular step (361) concordant with described the first end face (351a) and the 4th horizontal step (362) and five perpendicular step (363) and the five horizontal step (364) concordant with described the second end face (351b);
Along with spool (5) forward, it is upper that described lower seal plate (52) is stuck in the first end face (351a), the described the 4th perpendicular step (361) and described the 4th horizontal step (362) of described lower circular arc plate (351) simultaneously, to interrupt being communicated with of described the 4th cavity (312) and described media outlet (32); Along with spool (5) reversion, it is upper that described lower seal plate (52) is stuck in the second end face (351b), the described the 5th perpendicular step (363) and described the 5th horizontal step (364) of described lower circular arc plate (351) simultaneously, to interrupt being communicated with of described the 3rd cavity (311) and described media outlet (32).
9. distributing valve as claimed in claim 8, it is characterized in that, described intermediate clapboard (4) offers six seal groove (45) corresponding with described the 5th seal groove (36) position towards the diapire of a side of described cavity of resorption (31), and the upper end portion of described lower seal plate (52) is located in described the 6th seal groove (45).
10. a high-pressure service pump, comprises pumping mechanism (1); It is characterized in that, described high-pressure service pump also comprises the distributing valve as described in claim 1 to 9 any one, and described first interface (33) and described the second interface (34) are communicated with two conveying cylinders (11) of described pumping mechanism (1) respectively.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110361873.1A CN102434450B (en) | 2011-11-15 | 2011-11-15 | High-pressure pump and distribution valve thereof |
| PCT/CN2012/074040 WO2013071732A1 (en) | 2011-11-15 | 2012-04-14 | High-pressure pump and distribution valve thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110361873.1A CN102434450B (en) | 2011-11-15 | 2011-11-15 | High-pressure pump and distribution valve thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102434450A CN102434450A (en) | 2012-05-02 |
| CN102434450B true CN102434450B (en) | 2014-01-15 |
Family
ID=45982731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110361873.1A Active CN102434450B (en) | 2011-11-15 | 2011-11-15 | High-pressure pump and distribution valve thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102434450B (en) |
| WO (1) | WO2013071732A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917733A (en) * | 2015-12-25 | 2017-07-04 | 罗凤玲 | A kind of power set |
| CN110803504B (en) * | 2019-10-21 | 2021-09-10 | 苏师大半导体材料与设备研究院(邳州)有限公司 | Double-cylinder building material pushing mechanism |
| CN110803507B (en) * | 2019-10-21 | 2021-09-10 | 苏师大半导体材料与设备研究院(邳州)有限公司 | Efficient pushing method for building materials |
| CN110761987B (en) * | 2019-10-25 | 2021-09-10 | 苏师大半导体材料与设备研究院(邳州)有限公司 | Ceramic slurry pump medium distribution mechanism |
| CN113090490A (en) * | 2021-03-30 | 2021-07-09 | 中山大洋电机股份有限公司 | Water pump with pipeline distribution function, fuel cell system and control method |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1275011A (en) * | 1970-01-06 | 1972-05-24 | Sun Engineering Richmond Ltd | Apparatus for controlling the mixing of liquids |
| IT989402B (en) * | 1973-06-22 | 1975-05-20 | Italiana Forme Acciaio | 4-WAY DISTRIBUTING VALVE FOR PISTON PUMPS FOR OSTRICH LIME |
| CN2043675U (en) * | 1988-05-06 | 1989-08-30 | 煤炭工业部煤炭科学研究院上海研究所 | Axial plunger-type high-pressure water pump made of water lubricating material |
| ATE110443T1 (en) * | 1991-05-07 | 1994-09-15 | Hauhinco Maschf | HIGH PRESSURE WATER PUMP FOR PURE WATER. |
| CN2649813Y (en) * | 2003-10-29 | 2004-10-20 | 高先猛 | Concrete delivery pump change-over valve |
| GB2443196A (en) * | 2006-10-27 | 2008-04-30 | Clarke Uk Ltd | Method of assembling a dual cylinder positive displacement drill cuttings pump |
| WO2008115220A2 (en) * | 2006-12-19 | 2008-09-25 | Dakotafire Systems, Inc. | Fire suppression gel delivery and truck cab protection systems |
| CN101230929B (en) * | 2008-02-29 | 2010-04-21 | 合肥通用机械研究院 | Two-bit triplet powder reversing valve |
| CN101793246B (en) * | 2010-03-16 | 2013-08-28 | 三一汽车制造有限公司 | Concrete pumping structure and control method of concrete pumping structure |
| CN101871442B (en) * | 2010-06-23 | 2011-12-07 | 余文凌 | Radial plunger high-pressure water pump |
| CN102032173B (en) * | 2010-12-10 | 2012-05-23 | 三一重工股份有限公司 | Concreting machinery, pumping device thereof and distributing valve for pumping device |
| CN102146913B (en) * | 2011-03-01 | 2012-10-03 | 三一重工股份有限公司 | Pumping system and distributing valve thereof, and concrete transporting machinery |
-
2011
- 2011-11-15 CN CN201110361873.1A patent/CN102434450B/en active Active
-
2012
- 2012-04-14 WO PCT/CN2012/074040 patent/WO2013071732A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN102434450A (en) | 2012-05-02 |
| WO2013071732A1 (en) | 2013-05-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102434450B (en) | High-pressure pump and distribution valve thereof | |
| CN100491738C (en) | Non leakage fully power closed type vertical self priming pump | |
| CN101737354B (en) | Dynamic sealing vertical self sucking pump with high suction lift | |
| CN102536808B (en) | Sliding vane pump and the method utilizing sliding vane pump to carry fluid | |
| CN103899542A (en) | Series-parallel connection centrifugal pump | |
| US9447870B2 (en) | Power gear-shifting transmission and engineering machinery | |
| CN204780780U (en) | Embankment dam gap cementer | |
| CN102400968B (en) | Hydraulic valve, hydraulic system and concrete pumping equipment | |
| CN104455556B (en) | Multichannel gases at high pressure mechanical reversing mechanism | |
| CN105805354A (en) | Double-communication conversion high-pressure four-way electromagnetic valve | |
| CN202228451U (en) | High-low pressure change-over valve and concrete pumping device with same | |
| CN206668492U (en) | Piston pump | |
| CN105257612B (en) | A kind of power hydraulic system and concrete spraying vehicle | |
| CN105952611B (en) | A kind of absorption system piston reversing pumping device | |
| CN212361156U (en) | Fire hose universal joint | |
| CN102410169B (en) | Pumping machinery and pumping system thereof | |
| CN202876181U (en) | Water suction pipeline system of fire pump and fire truck | |
| CN209781191U (en) | Multifunctional high-pressure pump | |
| CN204003568U (en) | A kind of Novel down-hole high pressure water injection pump structure | |
| CN111520554A (en) | Fire hose universal joint | |
| CN202417868U (en) | Mining double-liquid grouting device | |
| CN110081032A (en) | A kind of engineering machinery and its hydraulic power mechanism | |
| CN204003712U (en) | High-low voltage switching device | |
| CN104047905A (en) | High-viscosity fluid pumping equipment controlled by three-way ball valves | |
| CN105042101A (en) | Modular multi-door overlapping sealing rotating gate valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: SANY AUTOMOBILE MANUFACTURING CO., LTD. Free format text: FORMER OWNER: SANYI HEAVY INDUSTRY CO LTD Effective date: 20130502 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20130502 Address after: 410100 Changsha economic and Technological Development Zone, Hunan City, the 31 industrial city Applicant after: SANY Automobile Manufacturing Co., Ltd. Address before: 410100 Changsha economic and Technological Development Zone, Hunan City, the 31 industrial city Applicant before: Sanyi Heavy Industry Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |