CN203272099U - Flow adjusting device changing plunger capacity - Google Patents
Flow adjusting device changing plunger capacity Download PDFInfo
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- CN203272099U CN203272099U CN 201320304282 CN201320304282U CN203272099U CN 203272099 U CN203272099 U CN 203272099U CN 201320304282 CN201320304282 CN 201320304282 CN 201320304282 U CN201320304282 U CN 201320304282U CN 203272099 U CN203272099 U CN 203272099U
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- plunger
- adjustable lever
- adjusting sleeve
- hole
- valve face
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Abstract
The utility model relates to a flow adjusting device changing the plunger capacity. The flow adjusting device is installed in a coaxial hole in a pump body (2) at the plunger reciprocating pump hydraulic end, wherein the coaxial hole is located in one side opposite to a plunger (1) of a plunger reciprocating pump and is in the same central line with the plunger (1) of the plunger reciprocating pump. The flow adjusting device comprises an adjusting sleeve (12), an adjusting rod (13) and an auxiliary plunger (4) coaxially arranged on the end portion of the plunger of the plunger reciprocating pump. The flow adjusting device is characterized in that a plunger hole is formed in the end portion of the plunger (1) of the plunger reciprocating pump, one end of the auxiliary plunger is arranged in the plunger hole, the other end of the auxiliary plunger is arranged inside a valve element (7) in a sliding, sealing and matched mode, the valve face of the valve element (7) can be matched with the valve face of the adjusting rod to achieve the opening or the closing of the valve face of the adjusting rod, and meanwhile the auxiliary plunger can be driven by the plunger to do reciprocating motion up and down and can go into and out a through hole (131) inside the adjusting rod (13). The flow adjusting device can be suitable for plunger reciprocating pumps with high pressure and mass flow.
Description
Technical field
The utility model relates to a kind of flow regulator that changes the plunger volume, this device is arranged on just can realize on the fluid end pump housing of plunger reciprocating pump that it regulates discharge flow rate.
Background technique
Plunger reciprocating pump is a kind of positive displacement pump, and the output flow of pump is relevant with plunger diameter, pump stroke and pump speed (reciprocal time per minute).What existing plunger reciprocating pump major part adopted is to change pump speed to transfer flow.But this method is only applicable to the situation that a reciprocating pump only has an exhaust port.For many exhaust ports of multi-cylinder reciprocating pump, if require the flow of each independent exhaust port all can regulate, existing plunger reciprocating pump does not reach above-mentioned requirements.
For above-mentioned situation, this case claimant has researched and developed two kinds of plunger reciprocating pumps that the multioutlet flow is adjustable, specifically can consult publication number is a kind of plunger reciprocating pump of CN101994688A, and publication number is that a kind of Pneumatic control variable reciprocating pump and the publication number of CN102155373A is the flow regulator of a CN102410194A plunger reciprocating pump.
Although the flow of these several plunger reciprocating pumps and the independent exhaust port of flow regulator all can be regulated, but front two kinds exist the deficiency that impact endurance test shock is large, noise is large, the third vibrations and noise reduce to some extent, but be only applicable to use in the pump of 16MPa with downforce, can not satisfy greater than using in 16MPa pressure and large flow plunger reciprocating pump.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of flow regulator that changes the plunger volume for above-mentioned prior art, can be applicable to the plunger reciprocating pump of the large flow of high pressure.
The utility model solves the problems of the technologies described above the technological scheme that adopts: a kind of flow regulator that changes the plunger volume, this flow regulator is arranged on the pump housing of plunger reciprocating pump fluid end, be positioned at the relative side of plunger of plunger reciprocating pump and be in the coaxial aperture of same center line with the plunger of plunger reciprocating pump, and this flow regulator comprises:
Be arranged on the adjusting sleeve in described coaxial aperture, adjusting sleeve inside arranges through hole, and this through hole inner end diameter is less than the middle part internal diameter;
Adjustable lever, move axially and be arranged in described adjusting sleeve interior bone and can make the interior ring-shaped chamber that forms in adjusting sleeve middle part, this adjustable lever inside is provided with perforation, this adjustable lever has the adjustable lever valve face that is communicated with perforation with holes towards an end of the plunger of plunger reciprocating pump, this adjustable lever sidewall is provided with the perforation that is communicated with perforation and described ring-shaped chamber, and this ring-shaped chamber is communicated with the import of described plunger reciprocating pump;
The coaxial subpost plug that is arranged on the plunger end of plunger reciprocating pump;
It is characterized in that: have plunger hole in the plunger end of described plunger reciprocating pump, an end of described subpost plug is arranged in described plunger hole; The other end slipper seal cooperation of described subpost plug is arranged in a spool, the valve face of this spool can coordinate, realize with the adjustable lever valve face closure or openness of adjustable lever valve face, simultaneously the subpost plug can to-and-fro motion under the drive of plunger, and the perforation of the adjustable lever inside of coming in and going out.
The setting of plunger hole can also be beneficial to the plunger cooling.
Between described spool and described plunger hole, spring is installed.
Described adjusting sleeve through hole rear portion arranges internal thread, and described adjustable lever front end is outer cylinder, and rearward end arranges outside thread, and described adjustable lever axially is installed in the through hole of described adjusting sleeve and the screw-internal thread fit at rearward end outside thread and adjusting sleeve through hole rear portion.
The cylindrical styletable of described adjustable lever front end is offered described adjustable lever valve face, the adjustable lever valve face is taper valve face or dull and stereotyped valve face or spherical valve face, accordingly, valve face on described spool supporting employing taper valve face or dull and stereotyped valve face and spherical valve face, described adjustable lever rearward end also is equipped with regulating handle.
Described regulating handle is that end band edge of a knife cover one end is the handle of cylindrical hole, rolled decorative pattern on its external diameter, it is arranged on the rearward end of adjustable lever, connect with Cock screw, also be processed with radially screw on regulating handle, screw is arranged on screw by the groove on adjusting sleeve, tightens the rotation that this screw can limit adjustable lever, prevent from becoming flexible in running changes in flow rate.
Axial scale is arranged on the external diameter of described adjusting sleeve, be shaped with the indication edge of a knife cover coaxial with adjusting sleeve on regulating handle, make adjustable lever when the adjusting sleeve internal spiral moves when rotating regulating handle, the indication edge of a knife of this regulating handle points to the position of scale value vision-control bar in adjusting sleeve of adjusting sleeve.
Described subpost plug one end is carved with outside thread, is arranged in the screw of plunger end plunger hole bottom, and the subpost plug the other end is equipped with locking nut and is used for the spacing of spool.
Described adjusting sleeve adopts bolt to be arranged on the pump housing by pressing plate, and Sealing is equipped with at described annular space two ends, and pressing plate be in one for step hole outward for square, square four jiaos have through hole, its step hole coordinates with the adjusting sleeve external diameter.
Valve core inside is provided with the pilot seal part, and spring is outside equipped with the spring guide sleeve, and the pilot seal part is pressed in spool by the spring guide sleeve.
Described subpost plug head locking nut place has a pillow block that one small piston is installed, and spool bore directly is slidably fitted in subpost beyond the Great Wall, and the valve face end has the step hole that holds small piston, perforation fitted seal on small piston and adjustable lever.
Compared with prior art, the utility model has the advantage of:
1, the switching of this device alternating cavity and suction port realizes by the switching between spool and adjustable lever, and between subpost plug and spool, sealing arranges, and the current that when having eliminated secondary plunger outer diameter and spool endoporus and entering the adjustable lever perforation, Sealing is subject to rush perverse and lost efficacy; Thereby the switching by valve has improved seal life, is specially adapted to the large flow rate working conditions of high pressure (greater than 16MPa).
2., the runner of adjusting flow is level and smooth, carries the dielectric viscosity loss of viscosity sensitivity little.Be particularly suitable for the technological requirement of oilfield injection compound.
3, the flow adjustment range is large, and flow output can be 0, and output quantity is 0-100 ﹪, the traffic requirement of each point when fully adapting to a pump multiple spot water supply; Wherein working flow is not that 0 o'clock other point also can work;
4, this installation composition part is few, few easy workout part, and reliability is high, and operating cost reduces.
5, flow is easy to adjust, directly perceived, can not shut down adjustment;
6, applicable to the multicylinder plunger reciprocating pump, each cylinder can be adjusted separately flow, separately output.A convenient pump is adjustable respectively for a plurality of points and flow.Be particularly suitable for the operating modes such as oil field one many wells of pump injection.Also can do multi-cylinder one remittance output.
Description of drawings
Fig. 1 is the structural representation that in the utility model embodiment one, plunger is in rear dead center position;
Fig. 2 be in the utility model embodiment one plunger move ahead, subpost spool and the structural representation of the valve face on adjustable lever when closing beyond the Great Wall;
Fig. 3 is the structural representation that in the utility model embodiment one, plunger is in front dead center position
Fig. 4 is the structural representation that in the utility model embodiment two, plunger is in rear dead center position;
Fig. 5 be in the utility model embodiment two plunger move ahead, subpost spool and the structural representation of the valve face on adjustable lever when closing beyond the Great Wall.
Fig. 6 is the structural representation that in the utility model embodiment two, plunger is in front dead center position.
Embodiment
Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.
Embodiment one:
Concrete as Fig. 1, Fig. 2, shown in Figure 3, plunger reciprocating pump mainly comprises the pump housing 2, is engaged in the interior plunger 1 of pump housing plunger hole, is arranged on suction valve group 3 and expulsion valve group 8 in the pump housing 2, wherein:
The pump housing 2 is provided with import 21 and outlet 22 and is used for the valve pocket that the plunger hole of plunger 1 is set and is respectively used to arrange suction valve group 3 and expulsion valve group 8, and the flow regulator that the pump chamber A of the pump housing is provided by plunger, suction valve group, expulsion valve group and the utility model jointly encloses and forms.
Plunger 1 sliding fit is driven and can be made reciprocal straight line motion in the plunger hole hole in the plunger hole of the pump housing 2.
The flow regulator that the utility model provides just is arranged on the pump housing 2, be positioned at the relative side of plunger 1, and be in the coaxial aperture of same center line with plunger 1, it mainly includes adjusting sleeve 12, pressing plate 11, adjustable lever 13, subpost plug 4, spring 5, spool 7, spring guide sleeve 6, pilot seal part 9, connecting tube 15 and regulating handle 17; Wherein:
Adjusting sleeve 12 use bolts are arranged on the pump housing 2 by pressing plate 11, and be positioned at coaxial aperture coaxial with plunger hole on the pump housing 2, that be positioned at the relative side of plunger hole, adjusting sleeve 12 external diameters are a step cylinder, and its inside arranges through hole, this through hole inner end diameter is less than the middle part internal diameter, and the rear end arranges internal thread.
One end of adjustable lever 13 is outer cylinder, and the other end arranges outside thread, moves axially be arranged in described adjusting sleeve 12 interior bone and can make the interior ring-shaped chamber 18 that forms in adjusting sleeve middle part; The cylindrical styletable of adjustable lever 13 has taper valve face and the perforation 131 coaxial with external diameter, has radial perforation to communicate with the ring-shaped chamber 18 of adjusting sleeve in perforation 131; Adjustable lever 13 also has a coaxial outer cylinder to be used for installing regulating handle 17 in male end.Sealing 10 and 14 are equipped with in ring-shaped chamber 18 two ends.
Regulating handle 17 is that end band edge of a knife cover shape one end is the handle of cylindrical hole, have four axial grooves on its external diameter and rolled decorative pattern, be convenient to rotate with hand, regulating handle 17 is arranged on the cylinder of adjustable lever 13 threaded exterior, connect with Cock screw, also be processed with radially screw on regulating handle, screw is arranged on screw by the groove on adjusting sleeve.Handle with sleeve can make adjustable lever move axially in adjusting sleeve.
Has plunger hole in plunger 1 end of plunger reciprocating pump.Subpost plug 4 is the externally threaded plunger rods in two ends, and its two outside thread is coaxial with secondary plunger outer diameter.Subpost plug 4 one end outside threads are co-axially mounted in the screw of plunger 1 end post consent bottom, and subpost plug 4 the other ends are slidably installed on spool 7.Spring 5 is installed between spool and plunger, locking nut is installed on the outside thread of subpost plug 4 the other ends is used for the spacing of spool 7.
Axial scale is arranged on the external diameter of adjusting sleeve 12, be shaped with the indication edge of a knife cover coaxial with adjusting sleeve on regulating handle 17, make adjustable lever when the adjusting sleeve internal spiral moves when rotating regulating handle 17, the edge of a knife of this adjusting sleeve points to the position of scale value vision-control bar in adjusting sleeve of adjusting sleeve.The percentage of Flow-rate adjustment namely.
Also be processed with radially screw in described regulating handle 17 female end on end face 20MM external diameter, screw 16 is arranged on screw by the groove on adjusting sleeve, tightens the rotation that this screw can limit adjustable lever, prevents from becoming flexible in running changes in flow rate.
The flow regulator that the utility model provides coordinates the principle of reciprocating pump work as follows: when plunger 1 is done to suck motion backward, spool 7 on subpost plug 4 is in closed condition with the valve face on adjustable lever 13, and pump chamber A volume increases, pressure decreased, suction valve group 3 is opened, and expulsion valve group 8 is closed.Medium enters in pump chamber A by suction valve group 3 from suction port.The valve face that spring 5 promotes on spool 7 and adjustable lever 13 keeps closed condition.After subpost plug 4 continued Sports band movable valve plug backward 7 and breaks away from valve face hole on adjustable levers 13, pump chamber A just communicated with suction port by annular space 18, the pipeline 15 of formation between the perforation on adjustable lever 13, adjusting sleeve 12 and adjustable lever 13.Medium directly thus passage enter pump chamber.Spring 5 promotion spools 7 were in and paid plunger foremost this moment.Shown in accompanying drawing 1, after plunger 1 moves to rear dead point, commutation does to discharge motion, and the medium in pump chamber A is got back to suction port by this passage again.When plunger motion to making the spool 7 on subpost plug 4 be in closed condition with valve face on adjustable lever 13, the pathway closure between pump chamber A and suction port, the main plunger of paying moves forward, pump chamber A increased pressure, remaining media is opened expulsion valve group 8 and is discharged.Plunger moves forward, and the valve face that spring 5 promotes on spool 7 and adjustable lever 13 keeps closed condition.After arriving rear dead center position, the pump discharge opeing finishes; Commutation does to suck motion.Begin again to take turns work cycle.
The discharge capacity of pump in a stroke is exactly that annulus area x pump chamber A between plunger 1 and subpost plug 4 and the pathway closure between suction port are put stroke between plunger front dead point; The position that moves axially adjustable lever 13 can change this stroke, has also just changed pump displacement.
When moving axially adjustable lever 13 positions to the foremost, when spool 7 on subpost plug 4 is opened all the time with the valve face on adjustable lever 13, the passage normal open between pump chamber A and suction port, pump duty is 0.
When moving axially adjustable lever 13 positions to backmost, when spool 7 on subpost plug 4 was closed all the time with the valve face on adjustable lever 13, the passage between pump chamber A and suction port was normally closed, and pump duty be maximum.It is rated flow.
Embodiment two
Concrete as Fig. 4, Fig. 5 and shown in Figure 6, different from embodiment one is:
The sealing of spool 7 and subpost plug 4 changes the endoporus sealing of small piston 19 and adjustable lever 13 into, and all the other are constant.That is: described spool 7 endoporus directly with subpost plug 4 external diameter sliding fits, cancellation pilot seal part 8, spring guide sleeve 6 screw threads are arranged on spool 7 one ends, at spool 7 valve face end increases axle step hole together.Described pair of plunger 4 installed the locking screw female end to be increased by a pillow block, is used for installing small piston 19.Described small piston 9 use locking nuts are fixed on subpost plug 4 ends.The perforation palpus fine finishing of described adjustable lever 13 is with small piston 19 external diameter fitted seal.
Its working principle is as follows: when plunger 1 was done to suck motion backward, on subpost plug 4, small piston 9 was in the endoporus of adjustable lever 13, and pump chamber A and import are in closed condition.Pump chamber A volume increases, and pressure decreased is opened suction valve group 3, and expulsion valve group 8 is closed.Medium enters in pump chamber A by suction valve group 3 from suction port.Drive small piston 19 and break away from after adjustable lever 13 endoporus enter the step hole of spool 9 front ends when subpost plug 4 continues motion backward, spool leaves valve face, and pump chamber A just communicates with suction port.Medium directly thus passage enter pump chamber.Shown in accompanying drawing 3, after plunger 1 moves to rear dead point, commutation does to discharge motion, and the medium in pump chamber A is got back to suction port by this passage again.To making the spool 7 on subpost plug 4 be in closed condition with valve face on adjustable lever 13, small piston 19 external diameters and spool 7 endoporus on subpost plug 4 also are in sealing state when plunger motion.Pathway closure between pump chamber A and suction port, the main plunger of paying moves forward, and small piston 19 enters in the hole of adjustable lever 13 and still is in the motive sealing state, makes the passage between pump chamber A and suction port continue to close.Pump chamber A increased pressure, remaining media are opened expulsion valve group 8 and are discharged.Plunger moves forward, and arrives pump discharge opeing end behind rear dead center position; Commutation does to suck motion.Begin again to take turns work cycle.
By above two embodiments as seen, core of the present utility model is plunger end increase by the one coaxial subpost plug at reciprocating pump, pays plunger the middle spool that is slidably installed.In the coaxial aperture of plunger opposite, adjusting sleeve and adjustable lever are set, the communicating with suction port in the face of plunger face has with coaxial taper valve face and the endoporus of external diameter of adjustable lever pole.The to-and-fro motion under pump drives of subpost plug.The slide valve face switching of thereon spool and adjustable lever end, realize the switching of pump chamber and suction port, by moving axially the position of adjustable lever, just changed pump chamber in pump stroke and the opening and closing points of suction port, adjust the effective travel of pump, thereby realized the adjustment of pump duty.Therefore; no matter the axially movable mechanism of adjustable lever is any mode; the pilot seal part of spool is any form; can axially movable adjustable lever so long as there is valve face to communicate with suction port, make the spool switching mode that its valve opening and subpost are slidably matched make alternating cavity A and import break-make come adjust flux all to fall into protection domain of the present utility model beyond the Great Wall.
Claims (10)
1. flow regulator that changes the plunger volume, this flow regulator is arranged on that the pump housing (2) of plunger reciprocating pump fluid end is upper, the relative side of plunger (1) that is positioned at plunger reciprocating pump and be in the coaxial aperture of same center line with the plunger (1) of plunger reciprocating pump, and this flow regulator comprises:
Be arranged on the adjusting sleeve (12) in described coaxial aperture, adjusting sleeve (12) inside arranges through hole, and this through hole inner end diameter is less than the middle part internal diameter;
Adjustable lever (13), move axially and be arranged in described adjusting sleeve (12) interior bone and can make the interior ring-shaped chamber that forms in adjusting sleeve (12) middle part, this adjustable lever (13) inside is provided with perforation (131), this adjustable lever (13) has the adjustable lever valve face that is communicated with perforation (131) with holes towards an end of the plunger (1) of plunger reciprocating pump, this adjustable lever (13) sidewall is provided with the perforation that is communicated with perforation (131) and described ring-shaped chamber, and this ring-shaped chamber is communicated with the import of described plunger reciprocating pump;
The coaxial subpost plug (4) that is arranged on the plunger end of plunger reciprocating pump;
It is characterized in that: the plunger of described plunger reciprocating pump (1) has plunger hole in the end, and an end of described subpost plug is arranged in described plunger hole; The other end slipper seal cooperation of described subpost plug is arranged in a spool (7), the valve face of this spool (7) can coordinate, realize with the adjustable lever valve face closure or openness of adjustable lever valve face, simultaneously subpost plug (4) can to-and-fro motion under the drive of plunger (1), and the inner perforation (131) of adjustable lever (13) of coming in and going out.
2. the flow regulator of change plunger volume according to claim 1, is characterized in that: spring (5) is installed between described spool (7) and described plunger hole.
3. the flow regulator of change plunger volume according to claim 1, it is characterized in that: described adjusting sleeve (12) through hole rear portion arranges internal thread, described adjustable lever (13) front end is outer cylinder, rearward end arranges outside thread, and described adjustable lever (13) axially is installed in the through hole of described adjusting sleeve (12) and the screw-internal thread fit at rearward end outside thread and adjusting sleeve (12) through hole rear portion.
4. the flow regulator of change plunger volume according to claim 3, it is characterized in that: the cylindrical styletable of described adjustable lever (13) front end is offered described adjustable lever valve face, the adjustable lever valve face is taper valve face or dull and stereotyped valve face or spherical valve face, accordingly, valve face on described spool supporting employing taper valve face or dull and stereotyped valve face and spherical valve face, described adjustable lever (13) rearward end also is equipped with regulating handle (17).
5. the flow regulator of change plunger volume according to claim 4, it is characterized in that: described regulating handle (17) is that end band edge of a knife cover one end is the handle of cylindrical hole, rolled decorative pattern on its external diameter, it is arranged on the rearward end of adjustable lever, connect with Cock screw, also be processed with radially screw on regulating handle, screw is arranged on screw by the groove on adjusting sleeve.
6. the flow regulator of change plunger volume according to claim 4, it is characterized in that: on the external diameter of described adjusting sleeve (12), axial scale is arranged, be shaped with the indication edge of a knife cover coaxial with adjusting sleeve (12) on regulating handle (17), make adjustable lever (13) when adjusting sleeve (12) internal spiral moves when rotating regulating handle (17), the indication edge of a knife of this regulating handle (17) points to the position of scale value vision-control bar (13) in adjusting sleeve (12) of adjusting sleeve (12).
7. the flow regulator of change plunger volume according to claim 1, it is characterized in that: described subpost plug (5) one ends are carved with outside thread, be arranged in the screw of plunger (1) end post consent bottom, subpost plug (5) the other end is equipped with locking nut and is used for the spacing of spool (7).
8. the flow regulator of change plunger volume according to claim 1, it is characterized in that: described adjusting sleeve adopts bolt to be arranged on the pump housing by pressing plate, Sealing is equipped with at described annular space two ends, and pressing plate is to be outward square for step hole in one, square four jiaos have through hole, and its step hole coordinates with the adjusting sleeve external diameter.
9. the flow regulator of change plunger volume according to claim 2, it is characterized in that: described valve core inside is provided with pilot seal part (8), spring is outside equipped with spring guide sleeve (6), and the pilot seal part is pressed in spool (7) by the spring guide sleeve.
10. the flow regulator of change plunger volume according to claim 1, it is characterized in that: described subpost plug head locking nut place has a pillow block that one small piston (19) is installed, spool bore directly is slidably fitted in subpost beyond the Great Wall, the valve face end has the step hole that holds small piston, perforation fitted seal on small piston and adjustable lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320304282 CN203272099U (en) | 2013-05-29 | 2013-05-29 | Flow adjusting device changing plunger capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320304282 CN203272099U (en) | 2013-05-29 | 2013-05-29 | Flow adjusting device changing plunger capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203272099U true CN203272099U (en) | 2013-11-06 |
Family
ID=49502528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320304282 Withdrawn - After Issue CN203272099U (en) | 2013-05-29 | 2013-05-29 | Flow adjusting device changing plunger capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203272099U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267012A (en) * | 2013-05-29 | 2013-08-28 | 宁波合力机泵有限公司 | Flow adjusting device capable of changing plunger volume |
| CN104234994A (en) * | 2014-09-22 | 2014-12-24 | 杨文升 | High-precision proportional regulating pump |
| CN106438338A (en) * | 2016-08-31 | 2017-02-22 | 宁波钱湖石油设备有限公司 | Fluid end of reciprocating pump |
| CN111692079A (en) * | 2020-06-18 | 2020-09-22 | 潍坊工程职业学院 | Adjustable compression device is with adjusting supercharging device |
-
2013
- 2013-05-29 CN CN 201320304282 patent/CN203272099U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267012A (en) * | 2013-05-29 | 2013-08-28 | 宁波合力机泵有限公司 | Flow adjusting device capable of changing plunger volume |
| CN103267012B (en) * | 2013-05-29 | 2015-10-07 | 宁波合力机泵有限公司 | A kind of flow regulator changing plunger volume |
| CN104234994A (en) * | 2014-09-22 | 2014-12-24 | 杨文升 | High-precision proportional regulating pump |
| CN104234994B (en) * | 2014-09-22 | 2017-04-26 | 杨文升 | High-precision proportional regulating pump |
| CN106438338A (en) * | 2016-08-31 | 2017-02-22 | 宁波钱湖石油设备有限公司 | Fluid end of reciprocating pump |
| CN111692079A (en) * | 2020-06-18 | 2020-09-22 | 潍坊工程职业学院 | Adjustable compression device is with adjusting supercharging device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131106 Effective date of abandoning: 20151007 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |