Double-gear oil pump lubricating device for reciprocating plunger pump

Abstract

The application belongs to the technical field of lubricating equipment, and particularly relates to a double-gear oil pump lubricating device for a reciprocating plunger pump, which comprises a reciprocating plunger pump body, a stuffing box arranged in the reciprocating plunger pump body, a liquid storage bin and two gear pumps arranged on one side of the reciprocating plunger pump body; the liquid storage bin is connected with a lubricating pipe group, and the liquid storage bin and the gear pumps; the double-gear oil pump lubricating device for the reciprocating plunger pump is provided with two gear pumps which are connected in parallel with the lubricating pipe group and serve as backup for each other, so that a single pump does not need to work continuously under full load for 24 hours, a stable magnetic field area is formed in the adsorption cavity through the semicircular magnet, the ferromagnetic metal particles flowing through the area are subjected to directional adsorption and interception, the convex and the adsorption cavity form a Venturi structure, the flow cross section is partially contracted to increase the flow velocity and turbulence of the oil flow, the adsorption cavity with the iron filings is rotated away from the magnetic field range and connected with the waste discharge port through the rotation of the adsorption ring around the semicircular magnet, and the on-line pollution removal is realized without shutdown.

Description

Technical Field

[0001] This invention belongs to the field of lubrication equipment technology, specifically relating to a dual-gear oil pump lubrication device for a reciprocating plunger pump. Background Technology

[0002] Reciprocating piston pumps are a type of positive displacement pump. They rely on the periodic reciprocating motion of the piston within the cylinder to change the volume of the sealed working chamber, thus completing the suction and discharge of liquid. The power end drives the crankshaft and connecting rod mechanism to propel the piston reciprocally. The suction and discharge valves work together to open and close, realizing the transportation of the medium. They have outstanding features such as high output pressure, wide pressure adjustment range, and high volumetric efficiency. They can transport various fluids such as clean water, oil, mud, and corrosive chemical media. However, the continuous high-speed friction between the piston and the sealed chamber and guide sleeve at the stuffing box can easily generate a large amount of frictional heat and cause dry running. Therefore, a lubrication system is required to achieve continuous lubrication and cooling.

[0003] Most existing dual-lubrication systems for reciprocating plunger pumps still use a single-pump oil supply structure. This lacks redundancy and backup design; if the pump fails, lubrication supply is easily interrupted, leading to dry friction and burning of the plunger and seals. Furthermore, a single pump must operate continuously at full load 24 hours a day, resulting in high mechanical wear and a short overall service life. During operation, plunger wear and surface plating peeling produce fine iron and steel debris. Gear pump tooth meshing and bearing operation also continuously generate metal abrasive particles. These hard particles, with their high hardness, easily clog the oil supply nozzle, wear the pump body cavity, and scratch the plunger surface, further accelerating the wear and failure of the oil pump, plunger, and sealing components. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-gear oil pump lubrication device for a reciprocating plunger pump in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions: A dual-gear oil pump lubrication device for a reciprocating plunger pump includes a reciprocating plunger pump body and a stuffing box inside the reciprocating plunger pump body. A liquid storage tank and two gear pumps are arranged on the side of the reciprocating plunger pump body. A lubrication pipe assembly is connected to the liquid storage tank, and the liquid storage tank, gear pumps, and stuffing box are connected through the lubrication pipe assembly to form a closed-loop oil circuit. The two gear pumps are connected in parallel via pipelines between the liquid storage tank and the stuffing box. The lubrication pipe assembly includes a return pipe connected to the liquid storage tank. A connecting seat is provided in the middle section of the return pipe. A semi-circular magnet is fixedly installed inside the connecting seat. An adsorption mechanism is rotatably sleeved on the semi-circular magnet. The adsorption mechanism includes an adsorption ring rotatably sleeved on the semi-circular magnet, and magnetic blocking blocks are symmetrically fixed on both sides of the adsorption ring.

[0006] As a further optimization of the present invention, the lubrication pipe assembly includes a suction pipe with one end connected to the liquid storage tank, and two suction branch pipes connected to the other end of the suction pipe. Each suction branch pipe is connected to the oil inlet of a single gear pump. Each gear pump has an oil outlet connected to an outlet branch pipe. All outlet branch pipes converge at their ends to form an outlet pipe, which is connected to the stuffing box. The stuffing box returns the lubricant to the liquid storage tank through a return pipe.

[0007] As a further optimization of the present invention, the connecting seat includes a horizontal tube, which is connected to the return pipe. A semi-circular receiving chamber is connected to the lower end of the horizontal tube. A waste discharge port is opened on the side of the receiving chamber opposite to the horizontal tube. The semi-circular magnet is fixedly installed in the receiving chamber, with the arc surface of the semi-circular magnet facing the horizontal tube. A through opening is opened on the receiving chamber.

[0008] As a further optimization of the present invention, the magnetic shielding block is configured as an arc-shaped structure coaxial with the adsorption ring, and the two ends of the two magnetic shielding blocks are enclosed to form an adsorption cavity. A sealing strip is fixedly provided on the outer wall of the magnetic shielding block, and the sealing strip is in contact with the inner wall of the receiving chamber.

[0009] As a further optimization of the present invention, a connector is fixedly provided on the adsorption ring, the connector is rotatably disposed through the through opening, an adjustment handle is fixedly provided on the connector, and a positioning mechanism is symmetrically provided on the side of the connector near the semi-circular magnet.

[0010] As a further optimization of the present invention, the positioning mechanism includes a groove formed on one side of the adjusting handle, a steel ball is slidably disposed in the groove, and an elastic element is disposed between the steel ball and the groove.

[0011] As a further optimization of the present invention, a positioning groove is provided on the semi-circular magnet, and the steel ball is movably disposed in the positioning groove.

[0012] As a further optimization of the present invention, a protrusion is fixedly provided inside the horizontal tube, and the protrusion is located on one side of the adsorption mechanism.

[0013] As a further optimization of the present invention, there are multiple stuffing boxes, and connecting pipes are connected between the stuffing boxes. The connecting pipes are located at both ends of the stuffing boxes, and the stuffing boxes are connected to the outlet pipe and the return pipe through the connecting pipes.

[0014] The beneficial effects of this invention are as follows: 1. Unlike existing technologies, in actual use, a stable magnetic field area is formed by a semi-circular magnet through the adsorption cavity, which directionally adsorbs and intercepts ferromagnetic metal abrasive particles flowing through the area. This can effectively prevent hard metal particles from circulating with the lubricating oil, and eliminate problems such as oil supply nozzle blockage, pump body cavity wear, and plunger surface scratches caused by them. It also prevents the wear and failure of the oil supply pump, plunger, and sealing components from being further aggravated.

[0015] 2. Unlike existing technologies, in actual use, the protrusions and the adsorption chamber work together to form a Venturi-like structure, which can locally shrink the flow cross section to increase the oil flow velocity and turbulence, so that the ferromagnetic abrasive particles in the oil can fully contact the magnetic field area of ​​the semi-circular magnet in the chamber, significantly improving the adsorption and purification efficiency of iron filings.

[0016] 3. Unlike existing technologies, in actual use, by rotating the adjustment handle, the adsorption surrounding semi-circular magnet can be rotated through the connecting parts. In conjunction with the sealing strip on the outer wall of the magnetic shielding block to separate the oil passage from the waste discharge area, the adsorption chamber containing iron filings can be moved away from the magnetic field range and connected to the waste discharge port, realizing online cleaning without stopping the machine.

[0017] 4. Unlike existing technologies, in actual use, two gear pumps connected in parallel to the lubrication pipe group serve as backups for each other and are intelligently rotated by software. This eliminates the need for a single pump to work continuously at full load for 24 hours, thus eliminating the shortcomings of traditional single pumps that have no backup and are prone to shutdown due to failure. It also balances the operating losses of the two pumps and effectively extends the service life of the pump body. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is the present invention. Figure 1 Another perspective structural diagram; Figure 3 This is a schematic diagram of the internal structure of the reciprocating plunger pump body of the present invention; Figure 4 This is a schematic diagram of the lubrication pipe assembly structure of the present invention; Figure 5 This is a schematic diagram of the connector structure of the present invention; Figure 6 This is the present invention. Figure 5 Schematic diagram of the connecting seat structure with LL section cut along the middle; Figure 7 This is an exploded structural diagram of the connector of the present invention; Figure 8 This is an exploded structural diagram of the positioning mechanism of the present invention.

[0019] In the diagram: 1. Reciprocating plunger pump body; 2. Lubrication pipe assembly; 21. Suction pipe; 211. Suction branch pipe; 22. Discharge pipe; 221. Discharge branch pipe; 23. Return pipe; 3. Gear pump; 4. Storage tank; 5. Connecting seat; 51. Horizontal pipe; 52. Receiving tank; 521. Through port; 53. Waste discharge port; 6. Stuffing box; 61. Connecting pipe; 7. Semi-circular magnet; 8. Adsorption mechanism; 81. Adsorption ring; 82. Magnetic block; 83. Adsorption chamber; 84. Sealing strip; 9. Connecting piece; 91. Adjusting handle; 10. Positioning mechanism; 101. Steel ball; 102. Elastic element; 103. Slide groove; 11. Positioning groove; 12. Protrusion. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] Example 1, as Figure 1 - Figure 3 As shown, a dual-gear oil pump lubrication device for a reciprocating plunger pump includes a reciprocating plunger pump body 1, with a stuffing box 6 installed inside the reciprocating plunger pump body 1; a liquid storage tank 4 and two gear pumps 3 are arranged on one side of the reciprocating plunger pump body 1, and the liquid storage tank 4, gear pumps 3, and stuffing box 6 are connected by a lubrication pipe assembly 2 to form a closed-loop lubrication oil circuit; the two gear pumps 3 are connected in parallel through pipelines between the liquid storage tank 4 and the stuffing box 6, serving as backups for each other and supporting intelligent alternating operation.

[0022] like Figure 4 As shown, the lubrication pipe assembly 2 includes a suction pipe 21, an outlet pipe 22, and a return pipe 23. One end of the suction pipe 21 is connected to the oil outlet of the storage tank 4, and the other end splits into two suction branches 211, each of which is connected to the oil inlet of a gear pump 3. Each gear pump 3 has an outlet pipe 221 connected to its outlet. The ends of the two outlet branches 221 merge and connect to the beginning of the outlet pipe 22. The end of the outlet pipe 22 is connected to the oil inlet side of the stuffing box 6. The oil outlet side of the stuffing box 6 is connected to the return pipe 23, and the end of the return pipe 23 is connected to the oil return port of the storage tank 4, forming a complete closed-loop circulation circuit.

[0023] like Figure 3 - Figure 4As shown, multiple stuffing boxes 6 are provided, and adjacent stuffing boxes 6 are connected by connecting pipes 61. The connecting pipes 61 are respectively arranged at both ends of the stuffing box 6. The first stuffing box 6 is connected to the liquid outlet pipe 22 through the connecting pipe 61, and the last stuffing box 6 is connected to the liquid return pipe 23 through the connecting pipe 61, so that the lubricating oil flows through each group of stuffing boxes 6 in sequence to complete the lubrication and cooling of the plunger and packing friction pair.

[0024] like Figure 4 - Figure 5 and Figure 7 As shown, a connecting seat 5 is connected in series in the middle section of the return pipe 23. The connecting seat 5 includes a horizontal pipe 51 and a semi-circular receiving chamber 52. The receiving chamber 52 is integrally connected to the lower side of the horizontal pipe 51. The two ends of the horizontal pipe 51 are respectively connected to the return pipe 23. A through port 521 is opened at the top of the receiving chamber 52. A waste discharge port 53 is opened on the side wall of the receiving chamber 52 facing the horizontal pipe 51.

[0025] like Figure 5 - Figure 6 As shown, a semi-circular magnet 7 is fixedly installed inside the receiving chamber 52, with the arc-shaped surface of the semi-circular magnet 7 facing the cavity side of the horizontal tube 51; an adsorption mechanism 8 is rotatably sleeved on the semi-circular magnet 7, the adsorption mechanism 8 includes an adsorption ring 81 and two magnetic shielding blocks 82, the adsorption ring 81 is rotatably sleeved on the outer wall of the semi-circular magnet 7, and the two magnetic shielding blocks 82 are symmetrically fixed on the outer walls of the adsorption ring 81 on both sides; the magnetic shielding blocks 82 are arc-shaped structures coaxial with the adsorption ring 81, and the two ends of the two magnetic shielding blocks 82 enclose and form two independent adsorption cavities 83; a sealing strip 84 is fixedly embedded on the outer wall of each magnetic shielding block 82, and the outer side of the sealing strip 84 is in contact with and sealed to the inner wall of the receiving chamber 52, which is used to separate the oil circuit area and the waste discharge area.

[0026] like Figure 7 As shown, a connector 9 is fixedly connected to the top of the adsorption ring 81. The connector 9 extends outward through the through-hole 521 at the top of the receiving chamber 52 and can rotate circumferentially along the through-hole 521. An adjusting handle 91 is fixedly installed at the upper end of the connector 9 for manually driving the adsorption mechanism 8 to rotate from the outside. Two sets of positioning mechanisms 10 are symmetrically arranged on the side of the connector 9 near the semi-circular magnet 7. A positioning groove 11 is correspondingly opened on the top end face of the semi-circular magnet 7. The positioning mechanism 10 and the positioning groove 11 cooperate to achieve precise locking of the rotation position.

[0027] like Figure 8 As shown, the positioning mechanism 10 includes a steel ball 101, an elastic element 102, and a slide 103. The slide 103 is located on one side of the adjusting handle 91. The steel ball 101 is slidably installed in the slide 103. The elastic element 102 is located between the steel ball 101 and the bottom of the slide 103. Under normal conditions, the elastic element 102 pushes the steel ball 101 partially out of the slide 103 and into the corresponding positioning groove 11, thereby achieving the positioning of the adsorption station and the waste discharge station.

[0028] like Figure 6 As shown, a protrusion 12 is fixedly provided on the inner wall of the horizontal tube 51. The protrusion 12 is located on the upper side of the adsorption mechanism 8. The protrusion 12 cooperates with the adsorption cavity 83 below, causing the flow cross section at that point to shrink locally, forming a Venturi tube-like structure, which is used to increase the oil flow rate, induce turbulence, enhance the contact effect between ferromagnetic abrasive particles and magnetic field, and improve the adsorption and purification efficiency.

[0029] It should be noted that, during actual operation of the reciprocating plunger pump lubrication equipment using a dual gear oil pump, the lubricating oil in the storage tank 4 is diverted through the suction pipe 21 to two suction branch pipes 211, which are then fed into two parallel gear pumps 3. The two gear pumps 3 are controlled by software to take turns working, and a single pump does not need to run continuously at full load for 24 hours. This allows for long-term uninterrupted oil spraying, perfectly matching the continuous operation of the plunger pump in all weather conditions. This not only completely solves the defects of traditional single pumps without backup and prone to lubrication interruption due to failure, but also balances the operating losses of the two pumps and extends the service life of the entire machine.

[0030] After being pressurized by gear pump 3, the lubricating oil flows into outlet pipe 22 through outlet branch pipe 221, and then into each group of stuffing boxes 6 through connecting pipe 61 to continuously lubricate and cool the friction pair of plunger and packing. The lubricating oil that has completed heat exchange flows out from the end stuffing box 6 and returns to the storage tank 4 through return pipe 23.

[0031] When the return oil flows through the horizontal pipe 51 of the connecting seat 5, the protrusion 12 on the inner wall of the horizontal pipe 51 and the adsorption cavity 83 form a Venturi-like structure, which narrows the flow cross section, instantly increases the oil flow velocity and generates turbulence, and carries the ferromagnetic abrasive particles in the oil through the adsorption cavity 83 area. At this time, the semi-circular magnet 7 forms a stable magnetic field through the adsorption ring 81, which directionally adsorbs the ferromagnetic abrasive particles in the oil onto the inner wall of the adsorption cavity 83, thus completing the oil purification.

[0032] When iron filings accumulate in the adsorption chamber 83 and need cleaning, the external adjusting handle 91 is rotated, causing the adsorption ring 81 to rotate around the semi-circular magnet 7 via the connecting piece 9. The magnetic blocking block 82, in conjunction with the sealing strip 84, always separates the oil passage from the waste discharge area, ensuring uninterrupted lubrication circulation. When the adsorption chamber 83 containing iron filings moves away from the magnetic field coverage of the semi-circular magnet 7 and connects with the waste discharge port 53 on the side wall of the receiving chamber 52, the iron filings lose their magnetic attraction and are discharged from the waste discharge port 53 along with a small amount of oil. During rotation, the steel ball 101 of the positioning mechanism 10 is engaged in the corresponding positioning groove 11 under the elastic force of the elastic element 102, achieving precise locking of the work position and ensuring stable adsorption and waste discharge states. The purified lubricating oil finally flows back to the storage chamber 4 via the return pipe 23, completing a complete closed-loop circulation.

[0033] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A lubrication device for a reciprocating plunger pump using a dual-gear oil pump, comprising a reciprocating plunger pump body (1) and a stuffing box (6) disposed inside the reciprocating plunger pump body (1), characterized in that: The reciprocating plunger pump body (1) is provided with a liquid storage tank (4) and two gear pumps (3) on its side; a lubrication pipe assembly (2) is connected to the liquid storage tank (4), and the liquid storage tank (4), gear pumps (3) and stuffing box (6) are connected through the lubrication pipe assembly (2) to form a closed circulation oil circuit; the two gear pumps (3) are connected between the liquid storage tank (4) and the stuffing box (6) in parallel pipelines. The lubrication pipe assembly (2) includes a return pipe (23) connected to the liquid storage tank (4). A connecting seat (5) is provided in the middle section of the return pipe (23). A semi-circular magnet (7) is fixedly provided in the connecting seat (5). An adsorption mechanism (8) is rotatably sleeved on the semi-circular magnet (7). The adsorption mechanism (8) includes an adsorption ring (81) rotatably sleeved on the semi-circular magnet (7). Magnetic isolation blocks (82) are symmetrically fixed on both sides of the adsorption ring (81). The connecting seat (5) includes a horizontal tube (51), which is connected to the return pipe (23). A semi-circular receiving chamber (52) is connected to the lower end of the horizontal tube (51). A waste outlet (53) is opened on the side of the receiving chamber (52) opposite to the horizontal tube (51). A semi-circular magnet (7) is fixedly installed in the receiving chamber (52), with the arc surface of the semi-circular magnet (7) facing the horizontal tube (51). A through-hole (521) is opened on the receiving chamber (52). The magnetic shielding block (82) is set as an arc structure coaxial with the adsorption ring (81). The two ends of the two magnetic shielding blocks (82) are connected. The parts are enclosed to form an adsorption cavity (83). A sealing strip (84) is fixedly provided on the outer wall of the magnetic shielding block (82). The sealing strip (84) is in contact with the inner wall of the receiving chamber (52). A connector (9) is fixedly provided on the adsorption ring (81). The connector (9) is rotatably provided through the through opening (521). An adjusting handle (91) is fixedly provided on the connector (9). A positioning mechanism (10) is symmetrically provided on the side of the connector (9) near the semi-circular magnet (7). A protrusion (12) is fixedly provided inside the horizontal tube (51). The protrusion (12) is located on one side of the adsorption mechanism (8).

2. The lubrication device for a reciprocating plunger pump using a dual-gear oil pump according to claim 1, characterized in that: The lubrication pipe assembly (2) includes a suction pipe (21) with one end connected to the liquid storage tank (4), and two suction branches (211) connected to the other end of the suction pipe (21). Each suction branch (211) is connected to the oil inlet of a single gear pump (3). Each gear pump (3) has an oil outlet connected to a liquid outlet branch (221). All the liquid outlet branches (221) are connected to a liquid outlet pipe (22) at their ends. The liquid outlet pipe (22) is connected to the stuffing box (6), and the stuffing box (6) returns to the liquid storage tank (4) through the return pipe (23).

3. The lubrication device for a reciprocating plunger pump using a dual-gear oil pump according to claim 1, characterized in that: The positioning mechanism (10) includes a groove (103) opened on one side of the adjusting handle (91), a steel ball (101) is slidably arranged in the groove (103), and an elastic element (102) is arranged between the steel ball (101) and the groove (103).

4. The lubrication equipment for a reciprocating plunger pump using a dual-gear oil pump according to claim 3, characterized in that: The semi-circular magnet (7) has a positioning groove (11), and the steel ball (101) is movably disposed in the positioning groove (11).

5. The lubrication device for a reciprocating plunger pump using a dual-gear oil pump according to claim 1, characterized in that: There are multiple stuffing boxes (6), and connecting pipes (61) are connected between the stuffing boxes (6). The connecting pipes (61) are located at both ends of the stuffing boxes (6), and the stuffing boxes (6) are connected to the outlet pipe (22) and the return pipe (23) through the connecting pipes (61).

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