阅读说明：本技术 双作用柱塞式供料泵 (Double-acting plunger type feeding pump ) 是由 郝晓静 于 2021-01-07 设计创作，主要内容包括：本发明公开了一种双作用柱塞式供料泵,包括泵体组件及驱动机构,所述泵体组件包括泵料缸体、进料管路、出料管路及四个截断阀,所述泵料缸体内设有活塞杆,所述进料管路及出料管路均气密连通所述泵料缸体,所述进料管路及出料管路与所述泵料缸体的连接通路均设有两个,且分别位于所述泵料缸体的前后两端处,四个所述截断阀分别安装在四个所述连接通路上,所述驱动机构用于带动所述活塞杆在所述泵料缸体内进行直线往复运动。本发明属于活塞泵领域,与现有技术相比的优点在于：可连续泵料、泵料均匀、成本低廉。(The invention discloses a double-acting plunger type feeding pump which comprises a pump body assembly and a driving mechanism, wherein the pump body assembly comprises a pumping cylinder body, a feeding pipeline, a discharging pipeline and four cut-off valves, a piston rod is arranged in the pumping cylinder body, the feeding pipeline and the discharging pipeline are both in airtight communication with the pumping cylinder body, two connecting passages of the feeding pipeline and the discharging pipeline and the pumping cylinder body are respectively arranged at the front end and the rear end of the pumping cylinder body, the four cut-off valves are respectively arranged on the four connecting passages, and the driving mechanism is used for driving the piston rod to perform linear reciprocating motion in the pumping cylinder body. The invention belongs to the field of piston pumps, and compared with the prior art, the invention has the advantages that: can continuously pump materials, has even pumping materials and low cost.)

1. A double acting plunger feed pump characterized by: including pump body subassembly and actuating mechanism, pump body subassembly includes pump material cylinder body (1), feed line (2), discharge pipeline (3) and four shut-off valves (4), be equipped with piston rod (15) in pump material cylinder body (1), feed line (2) and the equal airtight intercommunication of discharge pipeline (3) pump material cylinder body (1), feed line (2) and discharge pipeline (3) with connecting way (5) of pump material cylinder body (1) all are equipped with two, and are located respectively both ends department around pump material cylinder body (1), four shut-off valves (4) are installed respectively four on connecting way (5), actuating mechanism is used for driving piston rod (15) are in carry out straight reciprocating motion in pump material cylinder body (1).

2. A double acting plunger-type feed pump as in claim 1, wherein: the piston rod (15) is a single-piston type double-outlet rod, two ends of the piston rod (15) penetrate through and extend out of the pump cylinder body (1), and the two rod bodies of the piston rod (15) are the same in diameter.

3. A double acting plunger-type feed pump as in claim 1, wherein: actuating mechanism includes step motor (6), lead screw (7), ball nut (8), line rail (9) and slider (10), the output shaft of step motor (6) passes through shaft coupling (11) coaxial coupling lead screw (7), ball nut (8) are installed on lead screw (7), and fixed connection slider (10), slider (10) sliding connection line rail (9), and fixed connection piston rod (15), wherein line rail (9), lead screw (7) and piston rod (15) are all parallel to each other.

4. A double acting plunger-type feed pump according to any of claims 3, characterized in that: still include base (12), pump material cylinder body (1), step motor (6) and linear rail (9) all fixed mounting be in on base (12), lead screw (7) rotatably install on base (12).

5. A double acting plunger-type feed pump as in claim 4, wherein: the feeding pipeline (2) and the discharging pipeline (3) are respectively arranged on the left side and the right side of the pump material cylinder body (1).

6. A double acting plunger-type feed pump as in claim 1, wherein: the block valve (4) is a pneumatic ball valve.

Technical Field

The invention relates to the field of piston pumps, in particular to a double-acting plunger type feeding pump.

Background

The piston pump is also called an electric reciprocating pump, and is structurally divided into a single cylinder and a plurality of cylinders, and is characterized by high lift. It is suitable for transporting oil emulsion without solid particles at normal temperature. The device is used for water injection, oil injection and oil extraction of oil fields and coal seams; power pump of hydraulic press of chamber press, hydraulic sand cleaning, ammonia liquor delivery in fertilizer plant, etc. However, most of the existing piston pumps have working principles that after a working stroke is completed, the material is sucked in a reverse motion mode, and a vacuum period exists in the working process, so that the continuous working cannot be realized.

Publication No.: CN106523318A, patent name: a bidirectional piston pump and a control method thereof disclose a piston pump which is provided with two groups of unidirectional piston metering pumps, wherein one group is fed and the other group is discharged, and the two groups are alternately operated, thereby realizing the continuous discharge of the piston pump. However, the technical scheme has a complex structure and high cost, and two sets of driving mechanisms are adopted to be matched with two sets of metering pumps, so that a control system of the metering pump is complex, and deviation generated when a piston rod runs to a zero point is easy to occur in the actual use process, so that uneven pumping is caused, and improvement is needed.

Disclosure of Invention

The invention aims to overcome the technical defects and provide a double-acting plunger type feeding pump which can continuously pump materials, has uniform pumping materials and low cost.

In order to achieve the purpose, the invention adopts the technical scheme that: this design double-acting plunger type feed pump, including pump body subassembly and actuating mechanism, pump body subassembly includes pump material cylinder body, feeding pipeline, discharge line and four shut-off valves, be equipped with the piston rod in the pump material cylinder body, the equal airtight intercommunication of feeding pipeline and discharge line the pump material cylinder body, feeding pipeline and discharge line with the connecting channel of pump material cylinder body all is equipped with two, and is located respectively both ends department around the pump material cylinder body, four the shut-off valve is installed respectively four on the connecting channel, actuating mechanism is used for driving the piston rod is in carry out straight reciprocating motion in the pump material cylinder body.

Furthermore, the piston rod is a single-piston type double-outlet rod, two ends of the piston rod are communicated with each other and extend out of the pump material cylinder body, and the two rod bodies of the piston rod are the same in diameter.

Further, actuating mechanism includes step motor, lead screw, ball nut, line rail and slider, step motor's output shaft passes through shaft coupling coaxial coupling the lead screw, ball nut installs on the lead screw, and fixed connection the slider, slider sliding connection the line rail, and fixed connection the piston rod, wherein line rail, lead screw and piston rod are all parallel to each other.

Further, still include the base, pump material cylinder body, step motor and line rail all fixed mounting be in on the base, the lead screw is rotatably installed on the base.

Furthermore, the feeding pipeline and the discharging pipeline are respectively arranged on the left side and the right side of the pump material cylinder body.

Further, the block valve is a pneumatic ball valve.

After adopting the structure, compared with the prior art, the invention has the advantages that: according to the invention, only one independent driving mechanism drives the piston rod to move, and the cut-off valve is matched with the driving mechanism to be opened and closed, so that continuous material pumping can be realized; the pump material flow and speed of the pump material cylinder body with the single piston type double outlet rods are uniform and stable; the individual drive mechanisms are inexpensive and relatively easy to control.

Drawings

Figure 1 is a schematic perspective view of a double acting plunger feed pump of the present invention.

Figure 2 is a schematic side cross-sectional view of a double acting plunger feed pump of the present invention.

Figure 3 is a top view of the double acting plunger feed pump of the present invention.

As shown in the figure: 1. the pneumatic ball valve comprises a pump cylinder body, 2, a feeding pipeline, 3, a discharging pipeline, 4, a cut-off valve, 5, a connecting passage, 6, a stepping motor, 7, a screw rod, 8, a ball nut, 9, a linear rail, 10, a sliding block, 11, a coupler, 12, a base, 13, a fixed block, 14, a shaft seat, 15, a piston rod, 16, a sealing sleeve, 17, a first pneumatic ball valve, 18, a second pneumatic ball valve, 19, a third pneumatic ball valve, 20 and a fourth pneumatic ball valve.

Detailed Description

The following description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention, and the present invention is further described with reference to the accompanying drawings and embodiments.

Examples, see FIGS. 1-3: the invention relates to a double-acting plunger type feeding pump, which comprises a pump body assembly and a driving mechanism, wherein the pump body assembly comprises a pump material cylinder body 1, a feeding pipeline 2, a discharging pipeline 3 and four block valves 4, a piston rod 15 is arranged in the pump material cylinder body 1, and when the piston rod 15 moves in the pump material cylinder body 1, the piston is tightly attached to the cylinder wall, so that the volumes of the front part and the rear part of the pump material cylinder body 1 can be driven to change, and thus, pumping is realized;

the feeding pipeline 2 and the discharging pipeline 3 are both in airtight communication with the pumping cylinder body 1, two connecting passages 5 are arranged between the feeding pipeline 2 and the discharging pipeline 3 and between the pumping cylinder body 1 and are respectively positioned at the front end and the rear end of the pumping cylinder body 1, specifically, each pipeline is arranged in parallel with the pumping cylinder body 1, the connecting passages 5 are arranged at the front end and the middle part of the feeding pipeline 2 and the discharging pipeline 3, the connecting passages 5 are communicated into the pumping cylinder body 1, and the connecting passages 5 are positioned at the two ends of the pumping cylinder body 1, so that the movement of a piston rod 15 in the pumping cylinder body 1 can be utilized to pump and suck materials, and the continuous pumping can be realized by properly closing or opening the connecting passages 5;

the four block valves 4 are respectively arranged on the four connecting passages 5, and the four block valves 4 can prevent or open the passages of materials, so that the materials flow through the front part or the rear part of the pumping cylinder body 1, and the pumping and the sucking of the materials can be realized when the piston moves forwards and backwards;

the driving mechanism is used for driving the piston rod 15 to perform linear reciprocating motion in the pump cylinder body 1, the driving mechanism is diversified in form, and the driving mechanism with controllable motion of the piston rod 15 can be selected as long as the driving mechanism can be used.

The piston rod 15 is a single-piston type double-outlet rod, the piston assembly is arranged in the center of the structure of the single-piston type double-outlet rod, rod bodies are arranged on two sides of the piston assembly, and the same rod bodies are arranged on two sides of the piston, so that the volume change rate of the front and rear two cylinders separated by the piston in the pump material cylinder body 1 can be ensured to be consistent, two ends of the piston rod 15 are communicated with each other and extend out of the pump material cylinder body 1, the front and rear areas of the piston can be ensured to be the same, the piston moves the same distance and the feeding weight is the same in the forward and backward processes, a sealing sleeve 16 is arranged at the joint of the piston rod 15 and the pump material cylinder body 1, and the diameters of the two rod bodies of the piston rod 15 are the same.

Specifically, the driving mechanism adopted in this embodiment includes a stepping motor 6, a lead screw 7, a ball nut 8, a linear rail 9 and a slider 10, an output shaft of the stepping motor 6 is coaxially connected to the lead screw 7 through a coupling 11, the ball nut 8 is mounted on the lead screw 7 and is fixedly connected to the slider 10, the slider 10 is slidably connected to the linear rail 9 and is fixedly connected to the piston rod 15, wherein the linear rail 9, the lead screw 7 and the piston rod 15 are all parallel to each other, and a linear reciprocating motion can be realized by matching a ball lead screw nut pair and a linear rail slider pair, so that the structure has high motion stability and low cost, and can also be driven by adopting belt transmission, hydraulic pneumatic transmission and other manners; the device further comprises a base 12, the pump cylinder body 1, the stepping motor 6 and the linear rail 9 are fixedly mounted on the base 12 through fixing blocks 13, the screw rod 7 is rotatably mounted on the base 12 through a shaft seat 14, and the feeding pipeline 2 and the discharging pipeline 3 are respectively arranged on the left side and the right side of the pump cylinder body 1.

Specifically, the block valve 4 is a pneumatic ball valve, and the four pneumatic ball valves are controlled to be started and closed by a control circuit respectively.

When in specific use, the pump material process of the feed pump is as follows: referring to fig. 3, it can be seen that the four shut-off valves 4 are respectively a first pneumatic ball valve 17, a second pneumatic ball valve 18, a third pneumatic ball valve 19 and a fourth pneumatic ball valve 20; when the piston rod 15 in the pump cylinder body 1 moves towards one end of the pump cylinder body 1 far away from the driving mechanism, namely moves rightwards, at the moment, the control circuit enables the first pneumatic ball valve 17 and the fourth pneumatic ball valve 20 to be opened, the second pneumatic ball valve 18 and the third pneumatic ball valve 19 to be closed, at the moment, the materials are sucked from the feeding pipeline 2 at the front end of the pump cylinder body 1 by negative pressure generated in the pump cylinder body 1, and the piston of the piston rod 15 can extrude the materials in the pump cylinder body 1 from the discharging pipeline 3 at the rear end of the pump cylinder body 1; when the piston rod 15 moves towards one end of the pumping cylinder body 1 close to the driving mechanism, namely moves leftwards, at the moment, the control circuit enables the second pneumatic ball valve 18 and the third pneumatic ball valve 19 to be opened, and the first pneumatic ball valve 17 and the fourth pneumatic ball valve 20 to be closed, so that the pumping cylinder body 1 can form a passage in the discharge pipeline 3 at the front end and the feeding pipeline 2 at the rear end, and the material is sucked by means of negative pressure and extruded by positive pressure; therefore, the function of sucking and feeding can be realized in the two-way movement of the piston rod 15, and continuous and stable feeding can be realized.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.