Plunger pump with return line

Abstract

The utility model discloses a plunger pump with backflow pipeline, including the pump body, the front side of pump body is fixedly arranged with a plurality of pipelines, the one end of pipeline is away from the pump body and is fixedly connected with the front plate, the front surface middle position of front plate is fixedly arranged with the water inlet pipe, the bottom of front plate is installed with the backflow pipe, the top of pipeline is installed with the upper plate, the top center position of upper plate is fixedly set up with the plunger, one side of the top of upper plate is fixedly set up with the standpipe, the one end of backflow pipe is away from the front plate and is installed fixedly with the standpipe, the upper end of standpipe can be closed, the lateral wall of standpipe and the bottom of front plate all are fixedly set up with the pipe head, the both ends of backflow pipe are fixedly set up with the installation cover respectively, one side of installation cover is fixedly connected with backflow pipe, the utility model solves the problem that the existing plunger pump lacks effective buffer and pressure stabilizing mechanism in the backflow control aspect, and influences the service life of plunger pump.

Description

Technical Field

[0001] This utility model relates to the field of plunger pump technology, and in particular to a plunger pump with a reflux line. Background Technology

[0002] In modern industry, agriculture, construction, and numerous fluid transport fields, plunger pumps play an indispensable role as a key fluid transport device. They achieve liquid intake and discharge through the reciprocating motion of the plunger, generating high pressure and making them suitable for various complex operating conditions requiring high-pressure, high-flow-rate liquid transport.

[0003] However, existing plunger pumps have shortcomings in reflux control, lacking effective buffering and pressure stabilization mechanisms, which affects the service life of the plunger pump. Therefore, this utility model proposes a plunger pump with a reflux pipeline to solve the above problems. Utility Model Content

[0004] In view of the defects of the prior art, the purpose of this utility model is to provide a plunger pump with a return pipeline.

[0005] To achieve the above objectives, this utility model provides a plunger pump with a return pipeline, including a pump body. Several pipes are fixedly installed through the front side of the pump body. The end of each pipe away from the pump body is fixedly connected to a front plate. An inlet pipe is fixedly installed through the center of the front of the front plate. A return pipe is installed at the bottom of the front plate. An upper plate is installed above the pipes. A plunger is fixedly installed at the center of the top of the upper plate. A vertical pipe is fixedly installed on one side of the top of the upper plate. The end of the return pipe away from the front plate is fixedly installed to the vertical pipe. The upper end of the vertical pipe can be closed. Pipe heads are fixedly installed on the side wall of the vertical pipe and the bottom of the front plate. Mounting caps are fixedly installed at both ends of the return pipe. One side of the mounting cap is fixedly connected to the return pipe, and a through hole is provided on that side of the mounting cap. An annular groove is formed inside the mounting cap, and a first sealing ring is installed in the annular groove. The first sealing ring gradually thickens from the outside to the inside. The pipe head is inserted into the mounting cap.

[0006] Furthermore, a second sealing ring is fixedly provided inside the mounting cover on the side near the through hole, and the second sealing ring is in contact with the first sealing ring.

[0007] Furthermore, a drive mechanism for providing power to the plunger pump is provided on one side of the pump body. The drive mechanism includes a rotating wheel, and a rotating rod is fixedly provided on the side wall of the rotating wheel. The rotating rod passes through the pump body and is fixedly connected to the drive motor.

[0008] Furthermore, a cover is provided above the vertical pipe, and the cover is threadedly installed on the upper end of the vertical pipe.

[0009] Furthermore, the pipeline includes a first connecting pipe, one end of which is fixedly connected to the pump body, the other end of which is fixedly connected to a second connecting pipe, and the end of the second connecting pipe away from the first connecting pipe is fixedly connected to the front plate.

[0010] Furthermore, a pressure gauge is fixedly installed on the other side of the top of the upper plate, and drain pipes are installed on both sides of the front of the upper plate, with a drain valve installed on each drain pipe. The top of the second connecting pipe is fixedly connected to the upper plate through a short pipe.

[0011] Furthermore, a base is fixedly provided on both sides of the bottom of the pump body. The base is U-shaped and has mounting screw holes on the front and rear sides of the bottom.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention uses the volume space of the vertical pipe and the return pipe to temporarily store the return liquid, which can effectively absorb system pressure fluctuations and avoid the impact of instantaneous high pressure on the pump body and pipeline. The cap at the upper end of the vertical pipe can be adjusted by thread to control the degree of closure (completely closed or partially open), thereby flexibly controlling the flow rate of the return liquid, thus stabilizing the pressure of the pump body and the entire system, and solving the problem of unstable operation caused by pressure fluctuations in traditional plunger pumps.

[0013] This invention features a first sealing ring (gradually thicker from the outside to the inside) and a second sealing ring on the inner side of the mounting caps at both ends of the return pipe. The two rings are in close contact to form a double seal. The gradual thickness design of the first sealing ring can adaptively fit the insertion depth of the pipe head. Together with the second sealing ring, it further enhances the sealing effect, ensuring no liquid leakage during the return process and improving the connection sealing performance. Attached Figure Description

[0014] To more clearly illustrate the solutions in this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is the front perspective view provided by this utility model; Figure 2 This is a left-side stereoscopic view provided by this utility model; Figure 3 This is a rear-view perspective view provided by this utility model; Figure 4 This is a top-view perspective view provided by this utility model; Figure 5 This is an enlarged schematic diagram of part A provided by this utility model; Figure 6 This is the front view provided by this utility model; Figure 7 This is a cross-sectional view of the connection between the pipe head and the mounting cover provided by this utility model; Explanation of reference numerals in the attached figures: 1. Pump body; 2. Plunger; 3. Cover; 4. Pipe head; 5. Vertical pipe; 6. Return pipe; 7. Front plate; 8. Inlet pipe; 9. Mounting cover; 10. Mounting screw hole; 11. Base; 12. Second sealing ring; 13. Rotating rod; 14. Pressure gauge; 15. Top plate; 16. Annular groove; 17. Drain pipe; 18. Drain valve; 19. Rotating wheel; 20. Second connecting pipe; 21. First connecting pipe; 22. Short pipe; 23. Through hole; 24. First sealing ring. Detailed Implementation

[0016] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order.

[0018] Please see Figure 1-7A plunger pump with a return pipeline includes a pump body 1. A drive mechanism for powering the plunger pump is located on one side of the pump body 1. The drive mechanism includes a rotating wheel 19, and a rotating rod 13 is fixedly mounted on the side wall of the rotating wheel 19. The rotating rod 13 passes through the pump body 1 and is fixedly connected to a drive motor. Bases 11 are fixedly mounted on both sides of the bottom of the pump body 1. The bases 11 are U-shaped, and mounting screw holes 10 are provided on the front and rear sides of the bottom of the bases 11. Several pipes are fixedly mounted through the front of the pump body 1. The end of each pipe away from the pump body 1 is fixedly connected to a front plate 7. A water inlet pipe 8 is fixedly mounted through the center of the front of the front plate 7. The bottom of the front plate 7... The unit is equipped with a return pipe 6, and an upper plate 15 is installed above the pipe. A plunger 2 is fixedly installed at the top center of the upper plate 15. A vertical pipe 5 is fixedly installed on one side of the top of the upper plate 15. The end of the return pipe 6 away from the front plate 7 is fixedly installed to the vertical pipe 5. The upper end of the vertical pipe 5 can be closed. A sleeve cap 3 is installed above the vertical pipe 5. The sleeve cap 3 is threadedly installed on the upper end of the vertical pipe 5. The liquid in the return pipe 6 flows through the through holes 23 of the caps 9 installed at both ends and enters the vertical pipe 5 through the pipe head 4 on the side wall of the vertical pipe 5. The volume space of the vertical pipe 5 is used to temporarily store the return liquid and achieve pressure buffering. The degree of closure of the sleeve cap 3 at the upper end of the vertical pipe 5 can be adjusted by the thread. (Completely closed or partially open), controlling the flow rate of the return liquid to stabilize the pressure of the pump body 1 and the entire system. Pipe heads 4 are fixedly installed on the side wall of the vertical pipe 5 and the bottom of the front plate 7. Mounting covers 9 are fixedly installed at both ends of the return pipe 6. One side of the mounting cover 9 is fixedly connected to the return pipe 6, and a through hole 23 is provided on that side of the mounting cover 9. An annular groove 16 is opened inside the mounting cover 9, and a first sealing ring 24 is installed in the annular groove 16. The first sealing ring 24 gradually thickens from the outside to the inside. The pipe head 4 is inserted into the mounting cover 9. A second sealing ring 12 is fixedly installed on the side of the mounting cover 9 near the through hole 23. The second sealing ring 12 and the first sealing ring 24 are connected... The sealing ring 24 is in contact with the connection between the return pipe 6 and the pipe head 4 through the mounting cover 9. The pipe head 4 is inserted into the mounting cover 9. The first sealing ring 24 (which gradually thickens from the outside to the inside) in the annular groove 16 inside the mounting cover 9 is in close contact with the second sealing ring 12 near the through hole 23, forming a double seal to ensure that there is no leakage of liquid during the return process and to ensure the sealing and stability of the return system. The pipeline includes a first connecting pipe 21. One end of the first connecting pipe 21 is fixedly connected to the pump body 1, and the other end of the first connecting pipe 21 is fixedly connected to the second connecting pipe 20. The end of the second connecting pipe 20 away from the first connecting pipe 21 is fixedly connected to the front plate 7.

[0019] As an improvement to the above technical solution, a pressure gauge 14 is fixedly installed on the other side of the top of the upper plate 15, and drain pipes 17 are installed on both sides of the front of the upper plate 15. Each drain pipe 17 is equipped with a drain valve 18. The top of the second connecting pipe 20 is fixedly connected to the upper plate 15 through a short pipe 22. The pressure gauge 14 on the other side of the top of the upper plate 15 monitors the liquid pressure in the pump body 1 and the upper plate 15 in real time. When the pressure exceeds the set threshold (such as when the pressure rises suddenly due to excessive resistance of the external system), some high-pressure liquid enters the return pipe 6 from the pipe head 4 at the bottom of the front plate 7.

[0020] The working principle and usage of this utility model: In use, the drive motor is started, which drives the rotating rod 13 and the rotating wheel 19 to rotate. The rotating rod 13 drives the plunger 2 on the upper plate 15 to move up and down reciprocally through the mechanical transmission structure. When the plunger 2 moves upward, the internal volume of the pump body 1 increases, forming a negative pressure environment. Liquid enters the front plate 7 through the water inlet pipe 8 in the middle of the front of the front plate 7, and then flows into the pump body 1 through the pipeline system composed of the second connecting pipe 20 and the first connecting pipe 21, completing the liquid intake. When the plunger 2 moves downward, the internal volume of the pump body 1 decreases and the pressure increases. The liquid flows through the first connecting pipe 21 → the second connecting pipe 20, and then through the short pipe 22 into the upper plate 15. At this time, the drain valve 18 on the drain pipe 17 is opened, and the liquid is discharged from the drain pipe 17 to the external system. The pressure gauge 14 on the other side of the top of the upper plate 15 monitors the liquid pressure in the pump body 1 and the upper plate 15 in real time. When the pressure exceeds the set threshold (such as due to external...), When the system resistance is too high, causing a sudden pressure rise, some high-pressure liquid enters the return pipe 6 from the pipe head 4 at the bottom of the front plate 7. The liquid in the return pipe 6 flows through the through holes 23 of the mounting covers 9 at both ends, and enters the vertical pipe 5 through the pipe head 4 on the side wall of the vertical pipe 5. The volume space of the vertical pipe 5 and the return pipe 6 is used to temporarily store the return liquid, thereby achieving pressure buffering. The sleeve 3 at the upper end of the vertical pipe 5 can be adjusted by thread to control the degree of closure (completely closed or partially open), thereby stabilizing the pressure of the pump body 1 and the entire system. The connection between the return pipe 6 and the pipe head 4 is achieved through the mounting cover 9. The pipe head 4 is inserted into the mounting cover 9. The first sealing ring 24 (which gradually thickens from the outside to the inside) in the annular groove 16 inside the mounting cover 9 is in close contact with the second sealing ring 12 near the through hole 23, forming a double seal to ensure that there is no leakage of liquid during the return process, and to ensure the sealing and stability of the return system.

[0021] The above steps, through the synergistic effect of power transmission, suction and discharge circulation, and reflux buffering and pressure stabilization, solve the pressure fluctuation problem caused by the lack of effective reflux control in traditional plunger pumps, thus extending the service life of the equipment.

[0022] The above description is only used to illustrate the technical solution of this utility model, and is not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Any equivalent structural or procedural transformations made using the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A plunger pump with a return line, comprising a pump body (1), characterized in that: Several pipes are fixedly installed through the front side of the pump body (1). The end of the pipe away from the pump body (1) is fixedly connected to the front plate (7). A water inlet pipe (8) is fixedly installed through the middle of the front side of the front plate (7). A return pipe (6) is installed at the bottom of the front plate (7). An upper plate (15) is installed above the pipe. A plunger (2) is fixedly installed at the top center of the upper plate (15). A vertical pipe (5) is fixedly installed on one side of the top of the upper plate (15). The end of the return pipe (6) away from the front plate (7) is fixedly installed to the vertical pipe (5). The upper end of the vertical pipe (5) can be closed. The side wall of the vertical pipe (5) and the bottom of the front plate (7) are both fixedly provided with pipe heads (4). The two ends of the return pipe (6) are respectively fixedly provided with mounting covers (9). One side of the mounting cover (9) is fixedly connected to the return pipe (6), and the side of the mounting cover (9) is provided with a through hole (23). An annular groove (16) is opened on the inner side of the mounting cover (9). A first sealing ring (24) is installed in the annular groove (16). The first sealing ring (24) gradually becomes thicker from the outside to the inside. The pipe head (4) is inserted and installed in the mounting cover (9).

2. The plunger pump with a return pipeline according to claim 1, characterized in that: A second sealing ring (12) is fixedly provided on the side of the mounting cover (9) near the through hole (23), and the second sealing ring (12) is in contact with the first sealing ring (24).

3. The plunger pump with a return pipeline according to claim 1, characterized in that: The pump body (1) is provided with a drive mechanism that provides power to the plunger pump on one side. The drive mechanism includes a rotating wheel (19). A rotating rod (13) is fixedly provided on the side wall of the rotating wheel (19). The rotating rod (13) passes through the pump body (1) and is fixedly connected to the drive motor.

4. The plunger pump with a return pipeline according to claim 1, characterized in that: A cover (3) is provided above the vertical tube (5), and the cover (3) is threadedly installed on the upper end of the vertical tube (5).

5. The plunger pump with a return pipeline according to claim 1, characterized in that: The pipeline includes a first connecting pipe (21), one end of which is fixedly connected to the pump body (1), the other end of which is fixedly connected to a second connecting pipe (20), and the end of the second connecting pipe (20) away from the first connecting pipe (21) is fixedly connected to the front plate (7).

6. The plunger pump with a return pipeline according to claim 5, characterized in that: A pressure gauge (14) is fixedly installed on the other side of the top of the upper plate (15). Drain pipes (17) are installed on both sides of the front of the upper plate (15). A drain valve (18) is installed on each drain pipe (17). The top of the second connecting pipe (20) is fixedly connected to the upper plate (15) through a short pipe (22).

7. The plunger pump with a return pipeline according to claim 1, characterized in that: The pump body (1) has a base (11) fixedly installed on both sides of its bottom. The base (11) is U-shaped and has mounting screw holes (10) on the front and back sides of its bottom.

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