CN211573705U - Radial plunger pump device - Google Patents
Radial plunger pump device Download PDFInfo
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- CN211573705U CN211573705U CN201921769469.6U CN201921769469U CN211573705U CN 211573705 U CN211573705 U CN 211573705U CN 201921769469 U CN201921769469 U CN 201921769469U CN 211573705 U CN211573705 U CN 211573705U
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- plunger
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- eccentric wheel
- pivot
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Abstract
The utility model discloses a radial plunger pump device, it includes the pivot, the cover body, a plurality of eccentric wheel and a plurality of plunger, the pivot, a plurality of eccentric wheel and a plurality of plunger all are located the cover internally, the internal working chamber that has a plurality of radial direction along the pivot and extend that has of cover, a plurality of plunger forms a plurality of plunger group in turn, one-to-one between a plurality of plunger group and a plurality of eccentric wheel, a plurality of eccentric wheels set up at the axial direction of pivot interval, and a plurality of eccentric wheel dislocation eccentric settings is in the pivot, the one end of the plunger in the plunger group is supported and is leaned on in the eccentric wheel, the other end of plunger inserts the working chamber and can slide in the working chamber. The utility model discloses a relative distribution setting on the axial direction of pivot is organized to a plurality of plunger to apply radial effort in opposite directions to eccentric wheel and pivot, thereby can reach the radial atress of balanced pivot, greatly reduced the load of pivot, also greatly improved radial plunger pump device's life-span and performance.
Description
Technical Field
The utility model relates to a pump structure, in particular to radial plunger pump device.
Background
Plunger pumps have been widely used in the field of walking hydraulics and industrial hydraulics. The radial plunger pump utilizes the radial force generated by the rotating shaft to make the plunger reciprocate, the pressure difference of an oil cavity in the stroke changes, and the oil suction and oil discharge effects are realized.
At present, because radial plunger all is the single reciprocating motion that sets up on the axis of rotation for the axis of rotation receives the effect of radial unbalanced hydraulic pressure, has increased the burden of axis of rotation, and easily wearing and tearing have thereby restricted the improvement of its flow and pressure, and have influenced plunger pump's life.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is that receive the effect of radial unbalanced hydraulic pressure in order to overcome current axis of rotation, easily wearing and tearing have restricted defects such as improvement of radial plunger pump flow and pressure, provide a radial plunger pump device.
The utility model discloses an above-mentioned technical problem is solved through following technical scheme:
the utility model provides a radial plunger pump device, its characterized in that, it includes the pivot, overlaps body, a plurality of eccentric wheel and a plurality of plunger, pivot, a plurality of eccentric wheel and a plurality of the plunger all is located overlap internally, it has a plurality of edge to overlap the working chamber that the radial direction of pivot extends, a plurality of the plunger forms a plurality of plunger groups in turn, and is a plurality of plunger group and a plurality of one-to-one between the eccentric wheel, a plurality of the eccentric wheel is in interval setting, and a plurality of on the axial direction of pivot eccentric wheel dislocation eccentric settings is in the pivot, in the plunger group the one end of plunger support by in the eccentric wheel, the other end of plunger inserts the working chamber in can slide in the working chamber.
In this scheme, adopt above-mentioned structural style, the rotation through a plurality of eccentric wheels will drive the plunger among a plurality of plungers and slide in the working chamber, thereby realize the plunger at the internal reciprocating motion of cover, set up through the relative distribution of a plurality of plunger group on the axial direction of pivot, and exert radial effort in opposite directions to eccentric wheel and pivot, thereby can reach the radial atress of balanced pivot, greatly reduced the load of pivot, also greatly improved radial plunger pump device's life-span and performance.
Preferably, the number of the plungers in each plunger group is plural, and the plural plungers in each plunger group are rotationally symmetrical around the central axis of the rotating shaft.
Preferably, the number of the eccentric wheels and the plunger groups is even, the phase angle of any two adjacent eccentric wheels is 180 degrees different, and the phase angle of any two adjacent plunger groups is 180 degrees different.
In this scheme, adopt above-mentioned structural style, greatly offset the effort of plunger to the pivot, reduced the load of pivot, make the pressure that promotes radial plunger pump device provide the space.
Preferably, the radial plunger pump device further includes a plurality of return mechanisms, the return mechanisms correspond to the plurality of plungers one by one, and the return mechanisms are pressed between the sleeve body and the plungers and apply an acting force to the plungers in a direction close to the rotating shaft.
In this scheme, adopt above-mentioned structural style, exert the direction effort along being close to the pivot to the plunger through return stroke mechanism to the steady operation of radial plunger pump device has been guaranteed.
Preferably, the return mechanism is a spring.
In this scheme, adopt above-mentioned structural style, the spring provides the spring force, makes the plunger compress tightly on the eccentric wheel all the time.
Preferably, the radial plunger pump device further comprises a plurality of sliding shoes, the plurality of sliding shoes correspond to the plurality of plungers one by one, and the sliding shoes are connected to the plungers and pressed between the plungers and the eccentric wheel.
In this scheme, adopt above-mentioned structural style, the piston shoe has the guard action, through setting up the piston shoe between plunger and eccentric wheel, prevents plunger and eccentric wheel wearing and tearing, has improved radial plunger pump device's stability.
Preferably, the sleeve body comprises a pump shell and a plurality of plunger sleeves, the plunger sleeves correspond to the plungers one by one, the working cavity is located in the plunger sleeves, the eccentric wheel and the rotating shaft are both located in the pump shell, and the plunger sleeves are all connected to the pump shell.
In this scheme, adopt above-mentioned structural style, simple structure, installation preparation is convenient.
Preferably, the radial plunger pump device further includes an oil suction check valve and an oil discharge check valve, the sleeve body is internally provided with an oil suction flow passage and an oil discharge flow passage, the oil suction check valve is connected to the sleeve body, and both ends of the oil suction check valve are respectively connected to the oil suction flow passage and the working chamber, the oil discharge check valve is connected to the sleeve body, and both ends of the oil discharge check valve are respectively connected to the oil discharge flow passage and the working chamber.
Preferably, the sleeve body is internally provided with an oil cavity, the eccentric wheel is positioned in the oil cavity, one side of the eccentric wheel is provided with an oil suction groove, the plunger is provided with a connecting hole extending along the axial direction of the plunger, one end of the connecting hole is communicated with the working cavity, and the plunger can slide on the outer peripheral surface of the eccentric wheel and has an oil suction state and an oil discharge state;
when the oil suction state is realized, the other end of the connecting hole is communicated with the oil suction groove;
and in the oil discharging state, the other end of the connecting hole is not communicated with the oil suction groove and is in sealing abutting joint with the peripheral surface of the eccentric wheel.
Preferably, the radial plunger pump device further includes an oil discharge check valve, the sleeve body has an oil discharge flow channel therein, the oil discharge check valve is connected to the sleeve body, and two ends of the oil discharge check valve are respectively communicated with the oil discharge flow channel and the working chamber.
On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.
The utility model discloses an actively advance the effect and lie in:
the utility model discloses a radial plunger pump device is organized the relative distribution setting on the axial direction of pivot through a plurality of plunger to apply radial effort in opposite directions to eccentric wheel and pivot, thereby can reach the radial atress of balanced pivot, greatly reduced the load of pivot, also greatly improved radial plunger pump device's life-span and performance.
Drawings
Fig. 1 is a schematic view of an internal structure of a radial plunger pump device according to embodiment 1 of the present invention.
Fig. 2 is another schematic internal structural view of a radial plunger pump device according to embodiment 1 of the present invention.
Fig. 3 is a schematic view of an internal structure of a radial plunger pump device according to embodiment 2 of the present invention.
Fig. 4 is a schematic structural view of an eccentric wheel of the radial plunger pump device according to embodiment 2 of the present invention.
Fig. 5 is another schematic structural view of an eccentric wheel of a radial plunger pump device according to embodiment 2 of the present invention.
Description of reference numerals:
rotating shaft 1
Cover body 3
Working chamber 31
Oil suction flow passage 34
Oil discharge flow passage 35
Plunger 4
Sliding shoes 6
Oil suction one-way valve 7
Oil discharge check valve 8
Detailed Description
The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.
Example 1
As shown in fig. 1 and 2, embodiment 1 of the utility model discloses a radial plunger pump device, this radial plunger pump device includes pivot 1, a plurality of eccentric wheels 2, cover body 3 and a plurality of plunger 4, pivot 1, a plurality of eccentric wheels 2 and a plurality of plunger 4 all are located cover body 3, cover the working chamber 31 that has a plurality of radial direction extension along pivot 1 in the body 3, a plurality of plunger 4 forms a plurality of plunger groups in turn, a plurality of plunger groups and a plurality of eccentric wheels 2 one-to-one, a plurality of eccentric wheels 2 interval sets up on the axial direction of pivot 1, and a plurality of eccentric wheels 2 dislocation eccentric settings are on pivot 1, the one end of plunger 4 among the plunger group supports and leans on in eccentric wheel 2, the one end of plunger 4 inserts in working chamber 31 and can slide in working chamber 31.
The cover body 3 is internally provided with a cavity, the rotating shaft 1 is arranged in the cover body 3 and concentrically arranged with the cavity, the eccentric installation of the eccentric wheels 2 is arranged on the rotating shaft 1, and the eccentric positions of the eccentric wheels 2 on the rotating shaft 1 are different, so that the eccentric wheels 2 are arranged on the rotating shaft 1 in a staggered manner. The rotation through the pivot 1 will drive a plurality of eccentric wheels 2 also rotary motion in the cover body 3, and a plurality of plunger group distribute in the axial direction of pivot 1 and set up and exert radial effort to a plurality of eccentric wheels 2 and pivot 1, will drive the plunger 4 in the plunger group through the rotation of eccentric wheel 2 and slide in working chamber 31 to realize plunger 4 reciprocating motion in the cover body 3. When the radial plunger pump device works, the plunger groups are oppositely distributed in the axial direction of the rotating shaft 1 and apply opposite radial acting forces to the eccentric wheel 2 and the rotating shaft 1, so that the radial stress of the rotating shaft 1 can be balanced, the load of the rotating shaft 1 is greatly reduced, and the service life and the performance of the radial plunger pump device are also greatly improved.
The number of the plungers 4 in each plunger group is plural, and the plural plungers 4 in each plunger group are rotationally symmetrical around the central axis of the rotating shaft 1. The plurality of plungers 4 in each plunger group are located on the same plane and abut against the corresponding eccentric wheel 2, and the plurality of plungers 4 in each plunger group apply opposite radial acting forces to the corresponding eccentric wheel 2 and the rotating shaft 1, so that the acting forces are mutually counteracted, and the load of the rotating shaft 1 is greatly reduced.
In the embodiment, the number of the plungers 4 in each plunger group is three, the clamping between two adjacent plungers 4 is 120 degrees, and every two plungers are uniformly distributed in the sleeve body 3 along the radial direction with a 120-degree difference. The number of the eccentric wheels 2 is multiple, the eccentric wheels 2 correspond to the plunger sets one by one, and the plungers 4 in the plunger sets are all abutted to the corresponding eccentric wheels 2.
The number of the eccentric wheels 2 and the plunger piston groups is even; the phase angle of any two adjacent eccentric wheels 2 is 180 degrees different, and the phase angle of any two adjacent plunger groups is 180 degrees different. The number of the plunger groups is even and the plunger groups are arranged on the rotating shaft 1 side by side, the phase angle of two adjacent plunger groups around the rotating shaft 1 is 180 degrees different, and the phase angle of two corresponding adjacent eccentric wheels 2 is 180 degrees different. When the rotating shaft 1 is at the same position, when one eccentric wheel 2 reaches the top dead center, the other adjacent eccentric wheel 2 just reaches the bottom dead center. The radial force borne by the opposite plunger groups is the same, the acting force of the plungers 4 on the rotating shaft 1 is greatly offset, the load of the rotating shaft 1 is reduced, and a space is provided for improving the pressure of the radial plunger pump device. Meanwhile, the installation and the arrangement are very convenient. Of course, the number of eccentrics 2, the number of plunger groups and the number of plungers 4 in each plunger group may not be limited.
The sleeve body 3 comprises a pump shell 32 and a plurality of plunger sleeves 33, the plunger sleeves 33 correspond to the plungers 4 one by one, the working cavity 31 is located in the plunger sleeves 33, the eccentric wheel 2 and the rotating shaft 1 are located in the pump shell 32, and the plunger sleeves 33 are connected to the pump shell 32. The rotating shaft 1 and the eccentric wheel 2 are arranged in the pump shell 32, and the plurality of plungers 4 are respectively arranged in the plurality of plunger sleeves 33, so that the structure is simple, and the installation and the manufacture are convenient.
The radial plunger pump device also comprises a plurality of sliding shoes 6, the sliding shoes 6 correspond to the plungers 4 one by one, and the sliding shoes 6 are connected with the plungers 4 and are pressed between the plungers 4 and the eccentric wheel 2. The piston shoes 6 have a protection function, the plunger 4 is required to be always abutted against the eccentric wheel 2 in the using process of the radial plunger pump device, the piston shoes 6 are arranged between the plunger 4 and the eccentric wheel 2, the plunger 4 and the eccentric wheel 2 are prevented from being abraded, and the stability of the radial plunger pump device is improved.
The radial plunger pump device further comprises a plurality of return mechanisms 5, the return mechanisms 5 correspond to the plungers 4 one by one, and the return mechanisms 5 are pressed between the sleeve body 3 and the plungers 4 and apply acting force to the plungers 4 along the direction close to the rotating shaft 1. When the eccentric wheel 2 reaches the upper dead point from the lower dead point, the eccentric wheel 2 pushes the plunger 4 to move, so that the plunger 4 moves along the direction close to the sleeve body 3, the volume in the working cavity 31 is reduced, and the pressure is increased; when the eccentric wheel 2 reaches the bottom dead center at the top dead center, the eccentric wheel 2 will not push the plunger 4, exert the direction effort of following near the pivot 1 to the plunger 4 through the return stroke mechanism 5, the plunger 4 will move along the direction of being close to the pivot 1, will push the plunger 4 and remove and guarantee that the plunger 4 supports and lean on the outer peripheral face of eccentric wheel 2, the internal volume grow of working chamber 31, pressure increase to the steady operation of radial plunger pump device has been guaranteed.
The return mechanism 5 may be a spring. The spring provides a spring force, so that the plunger 4 and the sliding shoe 6 are always pressed on the eccentric wheel 2. Preferably, the return mechanism 5 may be a coil spring and is fitted over the plunger 4.
The radial plunger pump device further comprises an oil absorption one-way valve 7 and an oil discharge one-way valve 8, an oil absorption flow passage 34 and an oil discharge flow passage 35 are arranged in the sleeve body 3, the oil absorption one-way valve 7 is connected to the sleeve body 3, two ends of the oil absorption one-way valve 7 are respectively communicated with the oil absorption flow passage 34 and the working cavity 31, the oil discharge one-way valve 8 is connected to the sleeve body 3, and two ends of the oil discharge one-way valve 8 are respectively communicated with the oil discharge flow passage 35 and the working cavity 31.
The plunger 4 moves up and down in the working cavity 31, when the plunger 4 moves along the direction close to the rotating shaft 1, the volume in the working cavity 31 is increased, the pressure is reduced, the oil suction one-way valve 7 is opened, the oil discharge one-way valve 8 is closed, and the oil flows into the working cavity 31 through the oil suction flow passage 34 and the oil suction one-way valve 7 in sequence; when the plunger 4 moves to the bottom dead center, the oil suction ends. When the plunger 4 moves in the direction away from the rotating shaft 1, the volume in the working cavity 31 becomes smaller, the pressure is reduced, the oil discharge one-way valve 8 is opened, the oil suction one-way valve 7 is closed, and the oil in the working cavity 31 is discharged out of the radial plunger pump device through the oil discharge one-way valve 8 and the oil discharge flow passage 35 in sequence; when the plunger 4 moves to the top dead center, the oil discharge ends. Thereby realizing the oil suction and discharge function of the radial plunger pump device. In this embodiment, the inside of the sheath 3 has a cavity which can be free of oil.
When the radial plunger pump device works, the plunger groups are always in the same oil suction or oil discharge state, and the radial pressure of oil is the same. Because a plurality of plunger group are arranged relatively, the atress of a plurality of plungers 4 to pivot 1 will offset greatly, makes the load greatly reduced of pivot 1, makes the pressure of radial plunger pump device promote by a wide margin.
Example 2
As shown in fig. 3, 4 and 5, the same parts of the radial plunger pump device of the present embodiment as those of embodiment 1 will not be repeated, and only the differences will be described. In this embodiment, the radial plunger pump device does not include an oil suction check valve, and the sleeve body 3 does not have an oil suction flow passage therein.
The sleeve body 3 is internally provided with an oil cavity 36, the eccentric wheel 2 is positioned in the oil cavity 36, one side of the eccentric wheel 2 is provided with an oil suction groove 21, the plunger 4 is provided with a connecting hole 41 extending along the axial direction of the plunger, one end of the connecting hole 41 is communicated with the working cavity 31, and the plunger 4 can slide on the outer peripheral surface of the eccentric wheel 2 and has an oil suction state and an oil discharge state; when the oil is absorbed, the other end of the connecting hole 41 is communicated with the oil absorption groove 21; in the oil drainage state, the other end of the connecting hole 41 is not communicated with the oil suction groove 21 and is sealed against the outer peripheral surface of the eccentric wheel 2.
An oil cavity 36 is formed in the sleeve body 3, oil is arranged in the oil cavity 36, the eccentric wheel 2 is located in the oil cavity 36, and the oil can flow into the oil suction groove 21, so that the oil suction groove 21 is filled with the oil. In the oil suction state, the plunger 4 will abut against one side of the eccentric wheel 2 having the oil suction groove 21 and move from the top dead center of the eccentric wheel 2 to the bottom dead center, the oil in the oil suction groove 21 will enter the working chamber 31 through the connecting hole 41, and when the plunger 4 abuts against the bottom dead center of the eccentric wheel 2, the oil suction is finished. In the oil discharging state, the plunger 4 will abut against the side of the eccentric wheel 2 without the oil suction groove 21 and move from the bottom dead center to the top dead center of the eccentric wheel 2, and the oil chamber 36 will not be communicated with the connecting hole 41 and the working chamber 31, so that the oil in the working chamber 31 can be pressurized.
The radial plunger pump device further comprises an oil discharge one-way valve 8, an oil discharge flow channel 35 is arranged in the sleeve body 3, the oil discharge one-way valve 8 is connected to the sleeve body 3, and two ends of the oil discharge one-way valve 8 are respectively communicated with the oil discharge flow channel 35 and the working cavity 31. In an oil discharge state, the plunger 4 moves from the lower dead point of the eccentric wheel 2 to the upper dead point and abuts against one side, which is not provided with the oil suction groove 21, of the eccentric wheel 2, the volume in the working cavity 31 becomes smaller, the pressure is reduced, the oil discharge one-way valve 8 is opened, and oil in the working cavity 31 is discharged out of the radial plunger pump device sequentially through the oil discharge one-way valve 8 and the oil discharge flow passage 35; when the plunger 4 moves to the top dead center, the oil discharge ends.
The radial plunger pump device of the embodiment reduces the oil absorption one-way valve and simplifies the structure of the radial plunger pump device. The oil suction groove 21 is used for realizing oil suction, and the oil suction passage is enlarged, so that the self-suction capacity of the radial plunger pump device is improved.
Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (10)
1. The utility model provides a radial plunger pump device, its characterized in that, it includes the pivot, overlaps body, a plurality of eccentric wheel and a plurality of plunger, pivot, a plurality of eccentric wheel and a plurality of the plunger all is located overlap internally, it has a plurality of edge to overlap the working chamber that the radial direction of pivot extends, a plurality of the plunger forms a plurality of plunger groups in turn, and is a plurality of plunger group and a plurality of one-to-one between the eccentric wheel, a plurality of the eccentric wheel is in interval setting, and a plurality of on the axial direction of pivot eccentric wheel dislocation eccentric settings is in the pivot, in the plunger group the one end of plunger support by in the eccentric wheel, the other end of plunger inserts in the working chamber and can slide in the working chamber.
2. The radial plunger pump apparatus of claim 1, wherein the number of plungers in each of said plunger groups is plural, and the plural plungers in each of said plunger groups are rotationally symmetrical about a central axis of said rotating shaft.
3. The radial plunger pump apparatus of claim 1, wherein the number of said eccentrics and said plunger sets is even, and the phase angle of any two adjacent eccentrics differs by 180 degrees, and the phase angle of any two adjacent plunger sets differs by 180 degrees.
4. The radial plunger pump apparatus of claim 1, further comprising a plurality of return mechanisms, wherein the plurality of return mechanisms correspond to the plurality of plungers one to one, and the return mechanisms are pressed between the housing and the plungers and apply a force to the plungers in a direction close to the shaft.
5. The radial piston pump apparatus of claim 4 wherein said return mechanism is a spring.
6. The radial plunger pump apparatus of claim 1, further comprising a plurality of shoes, wherein a plurality of said shoes correspond one-to-one to a plurality of said plungers, said shoes being connected to said plungers and being compressed between said plungers and said eccentric.
7. The radial plunger pump apparatus of claim 1, wherein said housing comprises a pump housing and a plurality of plunger sleeves, said plurality of plunger sleeves corresponding to said plurality of plungers one to one, said working chamber being located within said plunger sleeves, said eccentric wheel and said rotating shaft being located within said pump housing, said plurality of plunger sleeves being connected to said pump housing.
8. The radial plunger pump device of any one of claims 1-7, further comprising an oil suction check valve and an oil discharge check valve, wherein the sleeve body has an oil suction flow passage and an oil discharge flow passage, the oil suction check valve is connected to the sleeve body, and both ends of the oil suction check valve are respectively communicated with the oil suction flow passage and the working chamber, the oil discharge check valve is connected to the sleeve body, and both ends of the oil discharge check valve are respectively communicated with the oil discharge flow passage and the working chamber.
9. The radial plunger pump apparatus as claimed in any one of claims 1 to 7, wherein said sleeve has an oil chamber therein, said eccentric is located in said oil chamber, one side of said eccentric has an oil suction groove, said plunger has a connecting hole extending in an axial direction thereof, one end of said connecting hole communicates with said working chamber, said plunger is slidable on an outer peripheral surface of said eccentric and has an oil suction state and an oil discharge state;
when the oil suction state is realized, the other end of the connecting hole is communicated with the oil suction groove;
and in the oil discharging state, the other end of the connecting hole is not communicated with the oil suction groove and is in sealing abutting joint with the peripheral surface of the eccentric wheel.
10. The radial plunger pump device of claim 9, further comprising an oil discharge check valve, wherein the sleeve body has an oil discharge flow channel therein, the oil discharge check valve is connected to the sleeve body, and two ends of the oil discharge check valve are respectively communicated with the oil discharge flow channel and the working chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921769469.6U CN211573705U (en) | 2019-10-21 | 2019-10-21 | Radial plunger pump device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921769469.6U CN211573705U (en) | 2019-10-21 | 2019-10-21 | Radial plunger pump device |
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| Publication Number | Publication Date |
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| CN211573705U true CN211573705U (en) | 2020-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921769469.6U Active CN211573705U (en) | 2019-10-21 | 2019-10-21 | Radial plunger pump device |
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| CN (1) | CN211573705U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610468A (en) * | 2020-12-14 | 2021-04-06 | 台州市蒙花机械有限公司 | Plunger pump |
| CN113217320A (en) * | 2021-05-12 | 2021-08-06 | 陈志昌 | Hydraulic-electric intelligent numerical control crankshaft wheel plunger pump |
-
2019
- 2019-10-21 CN CN201921769469.6U patent/CN211573705U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610468A (en) * | 2020-12-14 | 2021-04-06 | 台州市蒙花机械有限公司 | Plunger pump |
| CN113217320A (en) * | 2021-05-12 | 2021-08-06 | 陈志昌 | Hydraulic-electric intelligent numerical control crankshaft wheel plunger pump |
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Effective date of registration: 20210303 Address after: Room 402, building 19, 518 Xinzhuan Road, Xinqiao Town, Songjiang District, Shanghai, 201612 Patentee after: Shanghai Yigong Hydrogen Technology Co.,Ltd. Address before: Room 602-1, building 19, 518 Xinzhuan Road, Songjiang District, Shanghai, 201612 Patentee before: Shanghai Yigong Precision Technology Co.,Ltd. |
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| TR01 | Transfer of patent right |