High-flow plunger water pump

Abstract

The invention relates to the field of plunger water pumps, in particular to a high-flow plunger water pump, which comprises a crankshaft arranged in a crankshaft main box body, two ends of the crankshaft are positioned outside the main box body, a crank arm is arranged on the crankshaft, a connecting rod is arranged on the crank arm, one end of the connecting rod is movably connected with the crank arm, and the other end of the connecting rod is movably connected with a piston of a guide piston rod in a sub-box body on the main box body. The guide piston rod sequentially penetrates through the two sealing seats in the branch box body and the water suction chamber shell on the branch box body, a shaft shoulder of the guide piston rod is adjacent to the top of the water injection plunger, and a guide pressing sleeve is arranged on the upper portion of the water injection plunger; a branch box body pump cover matched with the branch box body pump body is arranged at the upper end of the branch box body pump body, a middle water outlet is formed in the side face of the branch box body pump cover, and a closed cooling chamber is arranged outside the crankshaft main box body. The invention saves energy, reduces consumption, greatly prolongs the service life, reduces the processing difficulty, shortens the processing time, reduces the cost, and can safely operate for a long time.

Description

[0001] This application is a divisional application of the original invention named high-flow plunger water pump. The application date of the original application is December 31, 2020, and the application number is CN202011622148.0. Technical Field

[0002] The invention relates to the field of plunger water pumps, in particular to a large-flow plunger water pump. Background Art

[0003] At present, there are many kinds of plunger pumps with small and medium flow rates. In order to reduce the floor space and make it more flexible to use, people have designed a W-shaped plunger pump, such as the "Plunger Pump" (Publication No. CN102606436A) published in the Patent Gazette of the State Intellectual Property Office on July 25, 2012. Its main content is: the connecting rod, piston and piston cylinder are at least two groups, each group includes 3, and the 3 connecting rods of each group are mounted on the same crank. The axes of the three piston cylinders in each group are not on the same plane. Each group of piston cylinders includes a first cylinder, a second cylinder and a third cylinder. The angle between the axes of the first cylinder and the second cylinder and the vertical direction is an acute angle. The second cylinder is located between the first and third cylinders, and the axis of the second cylinder remains vertical. In addition, a water suction cavity and a drainage cavity are respectively provided on the first cylinder, the second cylinder and the third cylinder. Its shortcomings are: the water in each cylinder is concentrated together and discharged from one drain port, which increases the drainage resistance of the piston cylinder far from the drain port, limiting the structure to a maximum of 4 groups. If there are more groups, the power of the power equipment used with it will increase abnormally by a large margin, and the efficiency required by the state will not be achieved. Summary of the invention

[0004] Based on the above problems, the purpose of the present invention is to provide a large flow plunger water pump with larger flow, less energy consumption, less processing difficulty, and more convenient use and maintenance. The present invention adopts the following technical solutions:

[0005] The present invention provides a large-flow plunger water pump, comprising a crankshaft main case body, wherein the crankshaft main case body is provided with a crankshaft with two ends located outside the main case body; the crankshaft is provided with a plurality of crank arms, each of the crank arms is provided with a plurality of connecting rods movably connected thereto, the other end of each connecting rod is movably connected to a piston on a guide piston rod in a sub-case body, and the sub-case body is connected to the crankshaft main case body; the upper end of the guide piston rod sequentially passes through two sealing seats in the sub-case body and a water suction chamber shell on the sub-case body and is connected to a water injection plunger arranged in the pump body, a water inlet through hole is provided on the top of the water injection plunger, and a water inlet valve plate is provided on the water inlet through hole; the pump body is connected to the sub-case body, and the upper end of the pump body is provided with a sub-case body pump cover matching therewith.

[0006] Preferably, a closed cooling chamber is provided on the crankshaft main case, and a cooling chamber water inlet hole and a cooling chamber water outlet hole are provided on the cooling chamber, the cooling chamber water inlet hole is connected to a cooling pump, and the cooling chamber water outlet hole is connected to a return hose.

[0007] Preferably, the crankshaft main case consists of an upper crankcase, a lower crankcase and a bottom cover, and the cooling chamber is arranged below the bottom cover.

[0008] Preferably, the inner hole of the water inlet valve plate is slidably matched with the outer circle of the guide pressing sleeve arranged on the upper part of the water injection plunger, and a water inlet spring is sleeved on the guide pressing sleeve, one end of the water inlet spring abuts against the water inlet valve plate, and the other end abuts against the guide pressing sleeve;

[0009] The upper part of the guide piston rod is located in the water injection plunger, the reduced diameter part of the guide piston rod passes through the central through hole at the top of the water injection plunger and the central through hole of the guide pressing sleeve and is connected to the locking nut, and the guide piston rod shoulder is pressed against the water injection plunger;

[0010] A noise reduction ring is arranged on the upper part of the guide pressure sleeve and the water inlet valve plate.

[0011] Preferably, a valve seat is provided in the lower through hole of the sub-box pump cover, a valve core corresponding to it is provided in the valve seat, a water outlet spring is provided in the valve core, the upper part of the water outlet spring is sleeved on the lower part of the shoulder of the limiting column, and the upper part of the shoulder of the limiting column is placed in the sub-box pump cover.

[0012] Preferably, a digital pulse sensing device is installed on the water outlet pipe connected to the middle drain port of the sub-box pump cover; a digital pulse sensing device is installed on the water inlet pipe connected to the water suction port of the water suction chamber;

[0013] The water inlet valve plate is coated with a non-metallic layer;

[0014] A ceramic layer is attached to the outer wall of the water injection plunger adjacent to the pump body.

[0015] Preferably, a sealing assembly is respectively provided at the connection between the sub-box body and the water absorption chamber, and the sealing assembly includes an oil-proof sealing seat, an oil-proof sealing ring, a waterproof sealing seat and a waterproof sealing ring. A spacer is provided between the oil-proof sealing seat and the waterproof sealing seat, and the spacer is a non-closed circular ring, and its opening corresponds to the overflow hole provided on the sub-box body.

[0016] Preferably, three sub-boxes are selected, the axis of the middle sub-box is perpendicular to the bottom surface of the crankshaft main box, and the angles between the sub-boxes on both sides and the middle sub-box are 30° to 40°.

[0017] Preferably, 3 to 10 crank arms are provided on the crankshaft; the number of sub-box pump covers on each sub-box is 1 to 2, and the side of each sub-box pump cover is provided with 1 to 2 drainage ports; the number of water suction chambers on each sub-box is 1 to 2, and each water suction chamber is provided with 1 to 2 water suction ports; the two water suction ports of the middle sub-box are respectively provided at the two ends of the water suction chamber, and the water suction ports of the sub-boxes on both sides are respectively provided on the outside of the water suction chamber; the drainage ports of the sub-box pump covers on the sub-boxes are all facing in one direction, and are connected to the water collecting tank through pipelines.

[0018] Compared with the prior art, the beneficial technical effects of the present invention are:

[0019] (1) The present invention adopts a W-shape with one group in the middle and two groups symmetrical on the left and right. Each sub-box is provided with 2 to 4 inlet and outlet ports, which significantly reduces the water inlet resistance and the drainage resistance. While increasing the flow rate, the matching motor can continue to operate at a low level, achieving the purpose of energy saving and consumption reduction. At the same time, due to the reduction of drainage resistance, the service life of the vulnerable parts of the drainage valve in the pump is greatly improved; (2) The inlet and outlet channels of the plunger water pump of the present invention can not only reduce the inlet and outlet resistance, but also facilitate maintenance. If there is a problem with one channel, the largest plunger pump with 30 cylinders only needs to disassemble a maximum of 5 cylinders, which reduces the difficulty, shortens the time and reduces the cost of maintenance compared with other plunger pumps; (3) The plunger pump of the present invention can make its larger parts, such as the water suction chamber, pump cover and pump body, be processed in sections, with low processing difficulty, high processing precision and low processing cost; (4) The present invention can be provided with 30 cylinders, with a large drainage volume, and can drain water from multiple places at the same time; (5) The present invention occupies a small area, with 18 cylinders and 12 cylinders in a V-shape. The area occupied by the cylinders is almost the same; (6) The plunger pump can operate safely for a long time; (7) The plunger pump has a large number of working cylinders. If the drainage of individual cylinder groups is abnormal, the pulse sensing device installed on the outlet pipe can detect the abnormal data in time, which is convenient for timely repair of the outlet spring and noise reduction seal of the abnormal drainage working group; (8) If the water inflow of individual cylinder groups is abnormal, the pulse sensing device on the inlet pipe can detect the abnormal data in time, which is convenient for timely repair of the inlet valve plate and inlet spring of the abnormal drainage working group; (9) The diameter size of the water collecting tank of the plunger pump is first enlarged and then gradually reduced to the normal size in three stages, which effectively reduces the additional vibration and noise caused by high-pressure and large-flow water outlet to the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the main view of the present invention.

[0022] Figure 2 It is a schematic side view of the present invention.

[0023] Figure 3 It is a schematic top view of the present invention.

[0024] Figure 4 It is a schematic diagram of a side cross-section of the present invention.

[0025] Figure 5 The schematic diagram of the structure of the valve seat in the sub-box pump cover of the present invention (i.e. Figure 4 Enlarged view of the upper middle position);

[0026] Figure 6 It is a schematic diagram of the front cross section of the water inlet spring and the water inlet valve plate of the present invention.

[0027] Figure 7 It is a schematic diagram of the side section of the cooling chamber of the present invention.

[0028] Explanation of the reference numerals in the accompanying drawings: 1. sub-box pump cover; 2. water outlet spring; 3. valve seat; 4. valve core; 5. guide pressure sleeve; 6. water inlet spring; 7. water inlet valve plate; 8. water injection plunger; 9. pump body; 10. guide piston rod; 11. sealing assembly; 12. water suction chamber; 13. connecting rod; 14. upper crankcase; 15. crankshaft; 16. lower crankcase; 17. pressure cover; 18. noise reduction ring; 19. waterproof sealing seat; 20. spacer; 21. oil-proof sealing seat; 22. waterproof sealing ring; 23. oil-proof sealing ring; 24. overflow hole; 25. through hole; 26. bottom cover; 27. piston; 28. limiting column; 29. ​​sub-box; 30. connecting pipe; 31. water collecting tank; 32. cooling chamber. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] like Figures 1 to 7 As shown, this embodiment discloses such a large-flow plunger water pump, wherein the upper crankcase 14 and the lower crankcase 16 are buckled to form a crankshaft main case, and the crankshaft main case with a bottom cover is provided with a crankshaft with both ends located outside the crankshaft main case. Preferably, a closed jacket, i.e., a cooling chamber 32, is provided outside the crankshaft main case (on the side wall or the bottom cover), and the cooling chamber 32 is provided with a cooling chamber water inlet hole and a cooling chamber water outlet hole. The cooling chamber water inlet hole is connected to the cooling pump, and the cooling chamber water outlet hole is connected to a return hose, so that the cooling water flows back to the water reservoir. The inlet and outlet water of the pump is used to cool the engine oil in the crankshaft main case to ensure the use viscosity of the engine oil and reduce the wear of the connecting rod bearing and the crankshaft diameter. As shown Figure 1-4As shown, there are 6 crank arms, and the pump cover 1 on each sub-box 29 is divided into 2, that is, each sub-box pump cover corresponds to 3 piston cylinders, and each sub-box pump cover 1 is provided with an intermediate drain port on its side, and the 2 intermediate drain ports of each sub-box are combined and drained through a connecting pipe 30, that is, the water from the intermediate drain ports is collected in a water collecting tank 31. The drain ports of the sub-box pump covers 1 on the three sub-boxes are all facing in one direction and connected to the water collecting tank 31 through pipelines. Similarly, the water absorption chamber 12 on each sub-box is also divided into 2, that is, each sub-water absorption chamber corresponds to 3 piston cylinders, and each sub-water absorption chamber is provided with an intermediate water absorption port, wherein the two water absorption ports of the middle sub-box are respectively provided at the two ends of the water absorption chamber, and the water absorption ports of the sub-boxes on both sides are respectively provided on the outer side of the sub-water absorption chamber (on the opposite side of the middle sub-box), and they are separately inletted with water.

[0031] exist Figure 4 In the schematic side cross-sectional diagram of the present invention, the plunger water pump of the present invention is provided with a crankshaft main case body composed of an upper crankcase 14, a lower crankcase 16 and a bottom cover 26, and a crankshaft 15 with two ends located outside the main case body is provided inside the crankshaft main case body, and a closed jacket, i.e., a cooling chamber 32, is provided on the bottom cover outside the crankshaft main case body. The cooling chamber 32 is provided with water inlet and outlet holes, and the water inlet hole is connected to the water suction pipe of the pump, and the water outlet hole is connected to the drainage pipe of the pump. The crankshaft 15 is provided with 6 crank arms, and each crank arm is provided with 3 connecting rods 13 with one end movably connected thereto, and the other end of each connecting rod is movably connected to the lower open circular groove-shaped piston 27 at the lower end of the guide piston rod 10 in the 3 sub-cases 29 on the main case body, and the top of the piston is provided with 4 symmetrical through holes 25. The middle case axis of the three sub-cases 29 is perpendicular to the bottom surface of the crankshaft main case, and the angle between the other two sub-cases and the middle case axis is 30°. Each guide piston rod passes through the two sealing seats in the sub-case and the water absorption chamber 12 shell on the sub-case in turn, and the upper part is located in the water injection plunger 8 in the pump body 9. A sealing assembly 11 is provided at the connection between each sub-case and the water absorption chamber. The sealing assembly 11 includes an oil-proof sealing seat 21 and an oil-proof sealing ring 23 and a waterproof sealing seat 19 and a waterproof sealing ring 22. A spacer 20 is provided between the two sealing seats (waterproof sealing seat 19 and oil-proof sealing seat 21). The spacer 20 is a non-closed circular ring, and its opening corresponds to the through hole, i.e., the overflow hole 24, provided on the sub-case. First, it prevents water from flowing into the oil chamber. Second, if water flows out of the hole, it proves that the seal is leaking and needs to be replaced to extend the service life of the pump. In addition, a ceramic layer is attached to the outer wall of the water injection plunger 8 adjacent to the pump body 9. The reduced diameter portion of the guide piston rod 10 passes through the central through hole at the top of the water injection plunger, and the shaft shoulder is adjacent to the top of the water injection plunger 8. The top of the water injection plunger 8 is provided with a central through hole and surrounding water inlet through holes, and a water inlet valve plate 7 is provided on the water inlet through hole. Figure 6As shown, the water inlet valve plate 7 is coated with a polyurethane non-metallic layer, and a cylindrical water inlet spring 6 is provided on the water inlet valve plate 7. The inner hole of the water inlet valve plate 7 is slidably matched with the outer circle of the guide pressure sleeve 5 provided on the upper part of the water injection plunger 8, and a locking nut is provided on the guide pressure sleeve with a wear-resistant alloy layer on the outer surface. A noise reduction ring 18 is provided on the upper part of the guide pressure sleeve 5 and the water inlet valve plate 7. A matching sub-box pump cover 1 is provided at the upper end of the pump body of each sub-box, and a side opening valve seat 3 corresponding to the pump cavity is provided in the lower through hole of the sub-box pump cover 1, and an upper opening groove-shaped valve core 4 corresponding to the pump cavity is provided in the valve seat 3, and a water outlet spring 2 is provided in the valve core, and the upper part of the water outlet spring 2 is sleeved on the lower part of the shaft shoulder of the cross-shaped limit column 28, and the upper part of the shaft shoulder of the cross-shaped limit column 28 is placed in the pressure cover 17 that closes the through hole on the pump cover, and the pressure cover 17 is movably connected to the pump cover through fasteners.

[0032] For example, the displacement is 360 cubic meters per hour and the head is 300 meters.

[0033] 1. It adopts patent number 200610134799.9 V-shaped 18-cylinder plunger pump. The 9 cylinders on one side share one water inlet and one water outlet. The power used by the matching motor is 550kW and the volumetric efficiency is 89%.

[0034] 2. The W-shaped 18-cylinder plunger pump of the present invention has 6 cylinders on one side with 2 water inlets and 2 water outlets. The power used by the motor matched therewith is 450kW, and the volumetric efficiency is 93.6% (reaching the national standard of 93% or more).

[0035] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A large flow plunger water pump, characterized in that: It comprises a crankshaft main case body, wherein the crankshaft main case body is provided with a crankshaft (15) at both ends of which are located outside the main case body; The crankshaft (15) is provided with a plurality of crank arms, each crank arm is provided with a plurality of connecting rods (13) movably connected thereto, the other end of each connecting rod (13) is movably connected to a piston (27) on a guide piston rod (10) in a sub-box (29), and the sub-box (29) is connected to the crankshaft main box; The upper end of the guide piston rod (10) passes through two sealing seats in the sub-box (29) and the shell of the water suction chamber (12) on the sub-box (29) in sequence, and is connected to a water injection plunger (8) arranged in the pump body (9); a water inlet through hole is provided on the top of the water injection plunger (8), and a water inlet valve plate (7) is provided on the water inlet through hole; the pump body (9) is connected to the sub-box (29), and a sub-box pump cover (1) matching with it is provided on the upper end of the pump body (9).

2. The large flow plunger water pump according to claim 1, characterized in that: The crankshaft main case is provided with a closed cooling chamber (32), the cooling chamber (32) is provided with a cooling chamber water inlet hole and a cooling chamber water outlet hole, the cooling chamber water inlet hole is connected to a cooling pump, and the cooling chamber water outlet hole is connected to a return hose.

3. The large flow plunger water pump according to claim 2, characterized in that: The crankshaft main case is composed of an upper crankcase (14), a lower crankcase (16) and a bottom cover (26), and the cooling chamber (32) is arranged below the bottom cover (26).

4. The large flow plunger water pump according to claim 1, characterized in that: The inner hole of the water inlet valve plate (7) is slidably matched with the outer circle of the guide pressing sleeve (5) provided on the upper part of the water injection plunger (8); a water inlet spring (6) is sleeved on the guide pressing sleeve (5); one end of the water inlet spring (6) abuts against the water inlet valve plate (7), and the other end abuts against the guide pressing sleeve (5); The upper part of the guide piston rod (10) is located in the water injection plunger (8), the reduced diameter part of the guide piston rod (10) passes through the central through hole at the top of the water injection plunger (8) and the central through hole of the guide sleeve (5) and is connected to the locking nut, and the shaft shoulder of the guide piston rod (10) is pressed against the water injection plunger (8); A noise reduction ring (18) is provided on the upper part of the guide pressure sleeve (5) and the water inlet valve plate (7).

5. The large flow plunger water pump according to claim 1, characterized in that: A valve seat (3) is arranged in the lower through hole of the sub-box pump cover (1), a valve core (4) corresponding thereto is arranged in the valve seat (3), a water outlet spring (2) is arranged in the valve core (4), the upper part of the water outlet spring (2) is sleeved on the lower part of the shaft shoulder of the limit column (28), and the upper part of the shaft shoulder of the limit column (28) is placed in the sub-box pump cover (1).

6. The large flow plunger water pump according to claim 1, characterized in that: A digital pulse sensing device is installed on the water outlet pipe connected to the middle drain port of the sub-box pump cover (1); a digital pulse sensing device is installed on the water inlet pipe connected to the water suction port of the water suction chamber (12); The water inlet valve plate (7) is coated with a non-metallic layer; A ceramic layer is attached to the outer wall of the water injection plunger (8) adjacent to the pump body (9).

7. The large flow plunger water pump according to claim 1, characterized in that: A sealing assembly (11) is provided at the connection between the sub-box body (29) and the water absorption chamber (12), and the sealing assembly (11) comprises an oil-proof sealing seat (21), an oil-proof sealing ring (23), a waterproof sealing seat (19) and a waterproof sealing ring (22). A spacer (20) is provided between the oil-proof sealing seat (21) and the waterproof sealing seat (19), and the spacer (20) is a non-closed circular ring, and its opening corresponds to the overflow hole (24) provided on the sub-box body (29).

8. The large flow plunger water pump according to claim 1, characterized in that: Three sub-boxes (29) are selected, the axis of the middle sub-box (29) is perpendicular to the bottom surface of the crankshaft main box, and the angles between the sub-boxes (29) on both sides and the middle sub-box (29) are 30° to 40°.

9. The large flow plunger water pump according to claim 1, characterized in that: The crankshaft (15) is provided with 3 to 10 crank arms; There are 1 to 2 sub-box pump covers (1) on each sub-box (29), and each sub-box pump cover (1) is provided with 1 to 2 drainage ports on its side; there are 1 to 2 water absorption chambers (12) on each sub-box (29), and each water absorption chamber (12) is provided with 1 to 2 water absorption ports; The two water suction ports of the middle sub-box (29) are respectively arranged at the two ends of the water suction chamber (12), and the water suction ports of the sub-boxes (29) on both sides are respectively arranged on the outside of the water suction chamber (12); The drainage outlets of the sub-tank pump cover (1) on the sub-tank (29) all face in one direction and are connected to the water collecting tank (31) via a pipeline.

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