CN213807950U

CN213807950U - Plunger pump assembly

Info

Publication number: CN213807950U
Application number: CN202023002151.0U
Authority: CN
Inventors: 李晓飞
Original assignee: Changzhou Shili Industrial Design Co
Current assignee: Changzhou Shili Industrial Design Co
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-07-27
Anticipated expiration: 2030-12-14

Abstract

The utility model provides a plunger pump assembly, a liquid inlet cavity, a liquid outlet cavity and two working cavities are arranged in a valve body; the liquid inlet cavity is arranged between the liquid inlet ends of the two liquid inlet one-way valves, and the liquid outlet cavity is arranged between the liquid outlet ends of the two liquid outlet one-way valves; the two plungers are respectively arranged in the two working cavities, and the parts of the two working cavities, which are positioned on the same side of the two plungers, are communicated with the liquid outlet end of the liquid inlet one-way valve and the liquid inlet end of the liquid outlet one-way valve on the same side; the driving mechanism is used for driving the two plungers to synchronously reciprocate in the axial direction of the two plungers. The plunger pump assembly is provided with two sets of plunger mechanisms, a liquid inlet and outlet system is formed by a liquid inlet one-way valve and a liquid outlet one-way valve at the same side of two plungers, the liquid inlet and outlet systems at two sides share a liquid inlet cavity and a liquid outlet cavity, and the plungers reciprocate once to perform liquid pumping and liquid discharging twice, so that the liquid outlet amount and the liquid outlet flow rate are improved. The working efficiency of the plunger pump is improved.

Description

Plunger pump assembly

Technical Field

The utility model relates to the technical field of pumps, especially, plunger pump subassembly.

Background

The plunger pump is an important device of a hydraulic system, and liquid suction and liquid discharge are realized by changing the volume of a sealed working cavity through reciprocating motion of a plunger in a cylinder body. The existing plunger pump has the defects of small liquid outlet amount and small liquid outlet flow speed due to the structural limitation, and can meet the working requirement only by being provided with a powerful power source.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to solve the plunger pump among the prior art and to go out the liquid measure little and go out the liquid velocity of flow little, need be equipped with the problem that powerful power supply could satisfy the work needs, the utility model provides a plunger pump subassembly solves above-mentioned problem.

The utility model provides a technical scheme that its technical problem adopted is: a plunger pump assembly comprising:

the valve body is internally provided with a liquid inlet cavity, a liquid outlet cavity and two working cavities;

the liquid inlet cavity is arranged between liquid inlet ends of the two liquid inlet one-way valves, and the liquid inlet one-way valves are fixed with the valve body in a sealing manner;

the liquid outlet cavity is arranged between the liquid outlet ends of the two liquid outlet one-way valves, and the liquid outlet one-way valves are fixed with the valve body in a sealing way;

the two plungers are hermetically connected with the valve body and respectively arranged in the two working chambers, and the parts of the two working chambers, which are positioned on the same side of the two plungers, are communicated with the liquid outlet end of the liquid inlet one-way valve and the liquid inlet end of the liquid outlet one-way valve on the same side;

and the driving mechanism is used for driving the two plungers to synchronously reciprocate in the axial direction of the two plungers.

Preferably, the driving mechanism comprises an eccentric shaft, a bearing and a connecting piece with a waist-shaped inner hole, the eccentric shaft comprises an output end and a power end, the axes of the output end and the power end deviate from each other, the bearing is sleeved on the output end of the eccentric shaft, the outer ring of the bearing is matched with the waist-shaped inner hole of the connecting piece, the width of the waist-shaped inner hole is equal to the diameter of the outer ring of the bearing, and the length of the waist-shaped inner hole is greater than or equal to the maximum diameter of the outer ring of the bearing when the outer ring rotates;

the plunger is fixedly connected with the connecting piece, and the axis of the plunger is vertical to the length direction of the waist-shaped inner hole.

Preferably, the middle of the plunger is provided with a groove, the connecting piece is inserted into the grooves of the two plungers and is fixedly connected with the plungers through bolts, and two opposite surfaces of the grooves formed by the plungers are attached to the outer wall of the connecting piece.

Preferably, two sealing rings are arranged on the plunger at intervals, the inner ring of each sealing ring is connected with the plunger in a sealing mode, the plunger can move relative to the sealing ring, and the outer ring of each sealing ring is connected with the valve body in a sealing mode.

Preferably, the valve body is provided with a liquid inlet communicated with the liquid inlet cavity and a liquid outlet communicated with the liquid outlet cavity.

Preferably, the valve body is provided with a transition cavity on each of two sides of the plunger, and the wall surface of the valve body forming the transition cavity is provided with four channel ports respectively communicated with the part of the two working cavities on the same side of the two plungers, the liquid outlet end of the liquid inlet one-way valve on the same side and the liquid inlet end of the liquid outlet one-way valve.

The beneficial effects of the utility model are that, this kind of plunger pump subassembly has two sets of plunger mechanisms, and two plungers can be synchronous reciprocating motion, become liquid business turn over system through a feed liquor check valve and a play liquid check valve in same one side of two plungers, and the liquid business turn over system of both sides shares a feed liquor chamber and flowing back chamber, and plunger reciprocating motion once can carry out twice drawing liquid and flowing back to liquid volume and play liquid velocity of flow have been improved. The working efficiency of the plunger pump is improved.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic perspective view of an embodiment of a plunger pump assembly according to the present invention.

Fig. 2 is a schematic plan view of an embodiment of a plunger pump assembly according to the present invention.

Fig. 3 is a sectional view a-a of fig. 2.

Fig. 4 is a sectional view B-B of fig. 2.

Fig. 5 is a schematic partial structural view of an embodiment of a plunger pump assembly according to the present invention.

Fig. 6 is a schematic partial structural view of an embodiment of a plunger pump assembly according to the present invention.

Fig. 7 is a schematic partial structural view of an embodiment of a plunger pump assembly according to the present invention.

Fig. 8 is a schematic partial structural view of an embodiment of a plunger pump assembly according to the present invention.

In the figure, 1, a valve body, 2, a liquid inlet check valve, 3, a liquid outlet check valve, 4, a plunger, 5, a sealing ring, 6, an eccentric shaft, 7, a bearing, 8, a connecting piece, 101, a middle part, 102, a left side part, 103, a right side part, 104, a liquid inlet cavity, 105, a liquid outlet cavity, 106, a liquid inlet, 107, a liquid outlet, 108, a working cavity, 109, a transition cavity, 601, an output end, 602 and a power end are arranged.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used only for convenience in describing and simplifying the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1-4, the utility model provides a plunger pump assembly, including valve body 1, feed liquor check valve 2, play liquid check valve 3, plunger 4 and actuating mechanism.

The valve body 1 comprises a middle part 101, a left side part 102 and a right side part 103, the left side part 102 and the right side part 103 are fixed on the left side and the right side of the middle part 101 through bolts, a liquid inlet cavity 104 and a liquid outlet cavity 105 are arranged in the middle part 101, a liquid inlet 106 communicated with the liquid inlet cavity 104 and a liquid outlet 107 communicated with the liquid outlet cavity 105 are arranged at the upper end of the middle part 101, in order to save space, the liquid inlet cavity 104 and the liquid outlet cavity 105 are arranged side by side and are close to each other, and therefore the liquid inlet 106 and the liquid outlet 107 are arranged in a staggered mode and are all semicircular.

Two sides of the liquid inlet cavity 104 are respectively provided with a liquid inlet one-way valve 2, liquid inlet ends of the two liquid inlet one-way valves 2 are oppositely arranged and are fixed by the middle part 101 and the front ends of the left side part 103 and the right side part 103, and the liquid inlet one-way valve 2 is hermetically connected with the valve body 1 through a rubber ring, so that liquid can only flow out of the liquid inlet one-way valve 2 after entering the liquid inlet cavity 104 from the liquid inlet 106.

Two liquid outlet one-way valves 3 are respectively arranged at two sides of the liquid outlet cavity 105, liquid outlet ends of the two liquid outlet one-way valves 3 are oppositely arranged and are fixed by rabbets of the middle part 101 and the left and right side parts 103, and the liquid outlet one-way valves 3 are hermetically connected with the valve body 1 through rubber rings, so that liquid can only flow into the liquid outlet cavity 105 from the liquid outlet one-way valves 3.

Two working chambers 108 are also arranged in the valve body 1 side by side, two plungers 4 are respectively arranged in the two working chambers 108, and the two plungers 4 are arranged in parallel and aligned at the ends. Two sealing rings 5 are arranged on each plunger 4 at intervals, the sealing rings 5 are fixed through the matching of an annular pressure plate and the middle part 101 and the left and right side parts, the inner ring of each sealing ring 5 is connected with the plunger 4 in a sealing mode, the plunger 4 can move along the axis of the sealing ring 5, and the outer ring of each sealing ring 5 is connected with the valve body 1 in a sealing mode. The two sealing rings 5 are respectively close to the two ends of the plunger 4 and divide the working chamber 108 into a left part, a middle part and a right part, so that the right part and the left part are not communicated with the middle part. The plunger 4 is connected with a driving mechanism in the middle part, and the driving mechanism is used for driving the two plungers 4 to synchronously reciprocate in the axial direction of the two plungers; the plunger 4 is moved with its both ends being retracted in the left and right side portions. The left parts of the two working chambers 108, the liquid outlet end of the liquid inlet one-way valve 2 on the left side of the liquid inlet chamber 104 and the liquid inlet end of the liquid outlet one-way valve 3 on the left side of the liquid outlet chamber 105 are communicated, and the right parts of the two working chambers 108, the liquid outlet end of the liquid inlet one-way valve 2 on the right side of the liquid inlet chamber 104 and the liquid inlet end of the liquid outlet one-way valve 3 on the right side of the liquid outlet chamber 105 are communicated.

In this example, as shown in fig. 4-7, the driving mechanism comprises an eccentric shaft 6, a bearing 7 and a connecting piece 8 with a kidney-shaped inner hole, the eccentric shaft 6 comprises an output end 601 and a power end 602, the axes of which are mutually deviated, the bearing 7 is sleeved on the output end 601 of the eccentric shaft 6, the outer ring of the bearing 7 is matched with the kidney-shaped inner hole of the connecting piece 8, the width of the kidney-shaped inner hole is equal to the diameter of the outer ring of the bearing 7, and the length of the kidney-shaped inner hole is more than or equal to the maximum diameter of the outer ring of the bearing 7 when rotating; the middle part of plunger 4 that is located the middle part is seted up flutedly, and connecting piece 8 inserts in two recesses of plunger 4 and through bolt and plunger 4 fixed connection, and the axis of plunger 4 is perpendicular with the length direction of waist type hole, and two opposite faces that plunger 4 formed the recess are laminated with the outer wall of connecting piece 8. When the power end 602 rotates around its axis, the output end 601 also rotates around the axis of the power end 602, and at this time, the outer ring of the bearing 7 is matched with the kidney-shaped inner hole of the connecting piece 8, so as to drive the connecting piece 8 to reciprocate in the axis direction of the plungers 4, thereby enabling the two plungers 4 to reciprocate. When the plunger 4 moves leftwards, the space between the left liquid inlet one-way valve 2 and the left liquid outlet one-way valve 3 of the plunger 4 is compressed, and the liquid in the space can only flow into the liquid outlet cavity 105 from the left liquid outlet one-way valve 3 and is finally discharged from the liquid outlet 107; and the space between the liquid inlet one-way valve 2 at the right side, the right side and the liquid outlet one-way valve 3 at the right side of the plunger 4 is enlarged, and the liquid in the liquid inlet cavity 104 can only flow into the space from the liquid inlet one-way valve 2 at the right side. When the plunger 4 moves rightwards, the space between the liquid inlet one-way valve 2 on the right side, the liquid outlet one-way valve 3 on the right side and the liquid inlet one-way valve 2 on the right side of the plunger 4 is compressed, and the liquid in the space can only flow into the liquid outlet cavity 105 from the liquid outlet one-way valve 3 on the right side and is finally discharged from the liquid outlet 107; and the space between the left side of the plunger 4, the left liquid inlet one-way valve 2 and the left liquid outlet one-way valve 3 is enlarged, and the liquid in the liquid inlet cavity 104 can only flow into the space from the left liquid inlet one-way valve 2.

In this example, as shown in fig. 8, two transition cavities 109 are respectively disposed on two sides of the valve body 1 located on the plunger 4, and four channel ports respectively communicated with the two working cavities 108 located on the same side of the two plungers 4, the liquid outlet end of the liquid inlet check valve 2 and the liquid inlet end of the liquid outlet check valve 3 on the same side are disposed on the wall surface of the valve body 1 forming the transition cavities 109. The liquid storage space is sequentially enlarged, and the working efficiency of the plunger 4 pump is improved.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic representation of the term does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A plunger pump assembly, comprising:

2. The plunger pump assembly of claim 1, wherein:

the driving mechanism comprises an eccentric shaft, a bearing and a connecting piece with a waist-shaped inner hole, the eccentric shaft comprises an output end and a power end, the axes of the output end and the power end deviate from each other, the bearing is sleeved on the output end of the eccentric shaft, the outer ring of the bearing is matched with the waist-shaped inner hole of the connecting piece, the width of the waist-shaped inner hole is equal to the diameter of the outer ring of the bearing, and the length of the waist-shaped inner hole is more than or equal to the maximum diameter of the outer ring of the bearing when the outer ring rotates;

3. The plunger pump assembly set forth in claim 2, wherein:

the middle part of the plunger is provided with a groove, the connecting piece is inserted into the grooves of the two plungers and is fixedly connected with the plungers through bolts, and two opposite surfaces of the grooves formed by the plungers are attached to the outer wall of the connecting piece.

4. A plunger pump assembly as claimed in claim 3, wherein: two sealing rings are arranged on the plunger at intervals, the inner ring of each sealing ring is in sealing connection with the plunger, the plunger can move relative to the sealing rings, and the outer ring of each sealing ring is in sealing connection with the valve body.

5. The plunger pump assembly set forth in claim 4, wherein: the valve body is provided with a liquid inlet communicated with the liquid inlet cavity and a liquid outlet communicated with the liquid outlet cavity.

6. The plunger pump assembly set forth in claim 5, wherein:

the two sides of the valve body, which are positioned on the plungers, are respectively provided with a transition cavity, and the wall surface of the valve body, which forms the transition cavity, is provided with four passage ports which are respectively communicated with the part of the working cavity, which is positioned on the same side of the two plungers, the liquid outlet end of the liquid inlet one-way valve and the liquid inlet end of the liquid outlet one-way valve, which are positioned on the same side of the two plungers.