Low-vibration small-size five-cylinder slurry pump

Abstract

The utility model relates to a five-cylinder slurry pump with low vibration and small volume, a crankshaft assembly is arranged in a rack assembly, and the rack assembly is provided with an oil groove below the crankshaft assembly corresponding to the crankshaft assembly; a concave oil groove supporting surface corresponding to the oil groove is arranged on the base assembly; the rack assembly is installed on the base assembly, the fluid end is installed on the rack assembly, the crankshaft assembly and the fluid end are arranged close to the two ends of the base assembly respectively, and the oil groove is suspended above an oil groove supporting face in a sinking mode. The fluid end comprises a cylinder sleeve, a piston, a fluid suction part and a fluid discharge part; the crankshaft assembly is in transmission connection with the piston to drive the piston to do piston motion relative to the cylinder sleeve; the oil groove is connected with a drain outlet, the base assembly is provided with an operation opening corresponding to the upper portion of the drain outlet, and a turning plate which is turned over to be opened is installed at the operation opening. The rack assembly is installed on the base in a sinking mode, the height of the rack assembly installed on the base assembly is reduced, the size is reduced, and vibration generated in the operation process of the crankshaft assembly is reduced through the gravity center.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of mud pump, concretely relates to a low vibration small volume five cylinder mud pump. BACKGROUND

[0002] In the petroleum drilling industry, the main role of mud pump is to make the drilling flushing fluid circulate inside and outside the wellbore, and flush the well bottom. Compared with the traditional three cylinder mud pump, the five cylinder mud pump has the advantages of large displacement and high pump pressure. The five cylinder mud pump mainly includes two parts of power end and hydraulic end, wherein the power end mainly includes rack assembly, motor assembly, crankshaft assembly, crosshead assembly, base assembly, etc., and the hydraulic end mainly includes cylinder sleeve structure, piston structure and pipeline structure, etc. The power end drives the piston to move, thereby realizing the transmission of mud and clean water.

[0003] The base assembly is used for supporting the weight of the whole pump set. The conventional base assembly is that the rack assembly is installed above the base assembly, and the crankshaft assembly is installed in the rack assembly. In order to realize the need of cooling during the operation of the crankshaft assembly, an oil groove is arranged below the position of the crankshaft assembly in the rack assembly. The oil groove protrudes downward to form a curved surface. Due to the existence of the curved surface of the oil groove, the whole pump set occupies a large space during installation, and the existence of the curved surface of the oil groove increases the height of the rack assembly, which leads to obvious vibration during operation due to the increase of the center of gravity. SUMMARY

[0004] In order to solve the above technical problems, the utility model provides a low vibration small volume five cylinder mud pump, which is installed in a sunken mode on the base, reduces the occupation of height space, and reduces the height of the center of gravity of the rack, thereby reducing the vibration during the operation of the crankshaft assembly.

[0005] The technical purpose of the utility model is realized through the following technical scheme:

[0006] A low vibration small volume five cylinder mud pump, comprising a base assembly, a rack assembly, a crankshaft assembly and a hydraulic end, the crankshaft assembly is installed in the rack assembly, and the rack assembly is provided with an oil groove below the crankshaft assembly corresponding to the crankshaft assembly; the base assembly is provided with a concave oil groove support surface above corresponding to the oil groove; the rack assembly is installed on the base assembly, the hydraulic end is installed on the rack assembly, the crankshaft assembly and the hydraulic end are respectively arranged close to the two ends of the base assembly, and the oil groove is suspended above the oil groove support surface in a sunken mode; the hydraulic end comprises a cylinder sleeve, five pistons arranged in the cylinder sleeve, a fluid suction part and a fluid discharge part connected with the cylinder sleeve; the crankshaft assembly is drivingly connected with the pistons to drive the pistons to move relative to the cylinder sleeve; the oil groove is connected with a blowdown opening, the base assembly is provided with an operation hole above corresponding to the blowdown opening, and a flip plate which is flipped open is installed at the operation hole.

[0007] Further, the base assembly comprises two parallel arranged I-beam, a support beam arranged between the two I-beams, the support beam is perpendicular to the I-beams; the frame assembly is fixed on the upper end surface of the I-beams; the two ends of the I-beams are respectively provided with a lifting round pipe which is perpendicular to the I-beams, the end of the lifting round pipe is arranged with a limiting plate.

[0008] Further, the two ends of the I-beams are respectively provided with a lifting round pipe which is perpendicular to the I-beams, the end of the lifting round pipe is arranged with a limiting plate.

[0009] Further, the two ends of the I-beams are respectively provided with a lifting round pipe which is perpendicular to the I-beams, the end of the lifting round pipe is arranged with a limiting plate.

[0010] Further, the fluid suction part comprises a first suction pipe, a second suction pipe and a suction valve box, one end of the first suction pipe is connected to the middle of the second suction pipe; five suction valve boxes are arranged on the second suction pipe in sequence along the length direction of the second suction pipe.

[0011] The fluid discharge part comprises five discharge valve boxes and a liquid discharge pipe, the five discharge valve boxes are connected to the liquid discharge pipe along the length direction of the liquid discharge pipe; each discharge valve box is connected to one suction valve box, each discharge valve box is provided with one cylinder sleeve, and each cylinder sleeve corresponds to one piston.

[0012] The suction valve box and the discharge valve box are respectively provided with a one-way valve, the one-way valve of the suction valve box is opened while the one-way valve of the discharge valve box is closed, and the one-way valve of the suction valve box is closed while the one-way valve of the discharge valve box is opened.

[0013] Further, the second suction pipe is located above the anti-skid support panel of one end of the I-beam, and the height of the anti-skid support panel close to the second suction pipe is lower than the height of the anti-skid support panel of the other end of the I-beam.

[0014] Further, the pollution outlet extends to below the anti-skid support panel close to the crankshaft assembly, the operation hole is arranged on the anti-skid support panel close to the crankshaft assembly, and the flap is hingedly arranged on the anti-skid support panel at the edge position of the operation hole.

[0015] Compared with the prior art, the oil tank support surface is arranged, the frame assembly is installed on the base in a sinking mode, the height of the frame assembly installed on the base assembly is reduced, the space occupation is reduced, and the vibration generated during the operation of the crankshaft assembly is reduced by reducing the gravity center. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a low-vibration small-volume five-cylinder mud pump structure schematic diagram of the utility model.

[0017] Figure 2 This is a schematic diagram of the base assembly structure in this utility model.

[0018] Figure 3 This is a schematic diagram of the lower part of the base assembly in this utility model.

[0019] In the picture:

[0020] 1. Base assembly; 2. Frame assembly; 3. Crankshaft assembly; 4. Hydraulic end; 5. Oil tank;

[0021] 11. I-beam; 12. Support beam; 13. Lifting pipe; 14. Limiting plate; 15. Anti-slip support panel; 41. First suction pipe; 42. Second suction pipe; 43. Suction valve box; 44. Discharge valve box; 45. Liquid discharge pipe. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to specific embodiments:

[0023] A low-vibration, compact five-cylinder mud pump, such as Figure 1 As shown, the assembly includes a base assembly 1, a frame assembly 2, a crankshaft assembly 3, and a hydraulic end 4. The crankshaft assembly 3 is mounted inside the frame assembly 1 with bearing support. The frame assembly 2 has an oil groove 5 below the crankshaft assembly 3, where lubricating oil is added to serve two purposes: lubricating the crankshaft and cooling it. The base assembly 1 has a recessed oil groove support surface corresponding to the oil groove 5. The frame assembly 2 is mounted on the base assembly 1, and the hydraulic end 4 is mounted on the frame assembly 1. The crankshaft assembly 3 and the hydraulic end 4 are located near the two ends of the base assembly 1, respectively. The oil groove 5 is recessed and suspended above the oil groove support surface, with the bottom of the oil groove 5 not in contact with the oil groove support surface. The hydraulic end 4 includes a cylinder liner, five pistons disposed inside the cylinder liner, a fluid intake section connected to the cylinder liner, and a fluid discharge section. The crankshaft assembly 3 is connected to the pistons to drive the pistons to move relative to the cylinder liner.

[0024] More specifically, the fluid suction unit includes a first suction pipe 41, a second suction pipe 42, and a suction valve box 43. One end of the first suction pipe 41 is vertically connected to the middle of the second suction pipe 42. Five suction valve boxes 43 are arranged sequentially above the second suction pipe 42 along its length.

[0025] The fluid discharge part comprises five discharge valve boxes 44, a liquid discharge pipe 45, and the five discharge valve boxes 44 are connected with the liquid discharge pipe 45 along the length direction of the liquid discharge pipe 45 respectively; each discharge valve box 44 is connected with one suction valve box 43 respectively, each discharge valve box 44 is provided with one cylinder sleeve respectively, and each cylinder sleeve corresponds to one piston respectively; the crankshaft assembly 3 is connected with an external power source such as a motor, a diesel engine and the like through an input shaft, the external power source drives the crankshaft of the crankshaft assembly 3 to rotate through the input shaft, and the crankshaft is connected to the pistons through a crank, a connecting rod and a crosshead assembly, so that the five pistons are driven by the crankshaft assembly 3 to move relative to the cylinder sleeves.

[0026] During operation, the pistons move outward relative to the cylinder sleeves, the one-way valves of the suction valve boxes 43 are opened while the one-way valves of the discharge valve boxes 44 are closed, and the fluid such as mud and water is sucked into the suction valve boxes 43 through the first suction pipe 41 and the second suction pipe 42; when the pistons move inward relative to the cylinder sleeves, the one-way valves of the suction valve boxes 43 are closed while the one-way valves of the discharge valve boxes 44 are opened, so that the sucked fluid enters the discharge pipe 45 through the one-way valves of the discharge valve boxes 44, and the reciprocation of the pistons realizes the suction and discharge of the fluid.

[0027] More specifically, as shown in Figure 2 The base assembly 1 comprises two parallel I-beam 11, a support beam 12 vertically arranged between the two I-beam 11; the frame assembly is fixed on the upper end surface of the I-beam 11; the two ends of the I-beam 11 are respectively provided with a lifting round pipe 13 which is perpendicular to the I-beam 11, and the end of the lifting round pipe 13 is provided with a limiting cover plate 14. When the mud pump needs to be lifted, the wire rope sleeve is sleeved on the end of the lifting round pipe 13 for lifting, and the limiting cover plate 14 can prevent the wire rope sleeve from falling off.

[0028] As a preferred, the two ends of the I-beam 11 are further provided with anti-skid support panels 15 above the lifting round pipes 13, and the frame assembly 2 and the fluid end 4 are arranged between the anti-skid support panels 15 at the two ends of the I-beam 11. The anti-skid support panel 15 is made of steel plate, and the surface of the steel plate is provided with protrusions, grooves or other patterns to play the role of anti-skid. The frame assembly on both sides is assembled, connected and fixed with the I-beam 11 through bolts, and the fluid end 4 is fixed on the frame assembly of the power output end of the crankshaft assembly.

[0029] More specifically, the oil groove support surface comprises a plurality of parallel support beams 16, the support beams 16 are distributed along the surface of the oil groove, and the two ends of the support beams 16 are respectively connected with the I-beam 11 perpendicularly.

[0030] As a preferred, as shown in Figure 3As shown, the oil tank 5 is also connected with a drain port extending below the anti-skid support panel 15 near the crankshaft assembly, and an operation port is also arranged on the anti-skid support panel 15 near the crankshaft assembly, and a flip plate 17 is installed on the operation port and is opened by turning, and the flip plate 17 is hinged on the anti-skid support panel 15 at the edge of the operation port. When it is necessary to discharge the dirty oil in the oil tank 5, the flip plate 17 is opened by turning, the drain port such as a drain pipe 18 is opened from the operation port to discharge the dirty oil, one end of the drain pipe 18 is connected with the inside of the oil tank 5, and the other end of the drain pipe 18 is provided with a sealing plate, a valve or the like, the drain pipe 18 is in a normally closed state and is only opened when the dirty oil is discharged, and the dirty oil can also be discharged outside the base assembly through the drain pipe extended from the drain port and opened by the flip plate.

[0031] Since the rack assembly 2 is sunkly installed on the base, the overall height corresponding to the fluid end 4 is also relatively lowered, preferably, the second suction pipe 42 is located above the anti-skid support panel 15 at the end of the I-beam, the height of the anti-skid support panel near the second suction pipe 42 is lower than that of the anti-skid support panel at the other end of the I-beam, and the height of the anti-skid support panel 15 below the second suction pipe 42 is lowered to provide space for the installation of the second suction pipe 15.

[0032] The embodiment is only a further explanation of the utility model and is not a limitation of the utility model, and those skilled in the art can make non-creative modifications to the embodiment according to the needs after reading the specification, but as long as the modifications are within the scope of the claims of the utility model, they are protected by the patent law.

Claims

1. A low vibration, small volume, five cylinder slurry pump comprising a base assembly, a frame assembly, a crankshaft assembly, a fluid end, characterized in that, The crankshaft assembly is installed in the frame assembly, and the frame assembly is provided with an oil groove below the crankshaft assembly; the base assembly is provided with a concave oil groove support surface corresponding to the oil groove; the frame assembly is installed on the base assembly, the fluid end is installed on the frame assembly, and the crankshaft assembly and the fluid end are arranged near the two ends of the base assembly respectively; the oil groove is suspended above the oil groove support surface; the fluid end comprises a cylinder sleeve, five pistons arranged in the cylinder sleeve, a fluid suction part and a fluid discharge part connected with the cylinder sleeve; the crankshaft assembly is drivingly connected with the pistons to drive the pistons to move relative to the cylinder sleeve; the oil groove is connected with a blowdown port, the base assembly is provided with an operation port above the blowdown port, and a flip plate which is turned open is installed at the operation port.

2. A low vibration, small volume, five cylinder mud pump according to claim 1, characterized in that, The base assembly comprises two I-beams arranged in parallel, and a support beam is arranged between the two I-beams; the frame assembly is fixed to the upper end surface of the I-beams; the two ends of the I-beams are respectively provided with a lifting round pipe which is perpendicular to the I-beams, and the end of the lifting round pipe is arranged outside the I-beam and provided with a limiting cover plate.

3. A low vibration, small volume, five cylinder mud pump according to claim 2, characterized in that, The two ends of the I-beams are further provided with anti-skid support panels above the lifting round pipes, and the frame assembly and the fluid end are arranged between the anti-skid support panels at the two ends of the I-beams.

4. A low vibration, small volume, five cylinder mud pump as claimed in claim 2, wherein, The oil groove support surface comprises a plurality of support beams arranged in parallel, and the support beams are linearly distributed along the surface of the oil groove, and the two ends of the support beams are respectively connected with the I-beams.

5. A low vibration, small volume, five cylinder mud pump as claimed in claim 3, wherein, The fluid suction part comprises a first suction pipe, a second suction pipe and suction valve boxes, one end of the first suction pipe is connected with the middle part of the second suction pipe perpendicularly, and five suction valve boxes are arranged above the second suction pipe along the length direction of the second suction pipe. The fluid discharge part comprises five discharge valve boxes and a liquid discharge pipe, the five discharge valve boxes are respectively connected with the liquid discharge pipe along the length direction of the liquid discharge pipe, each discharge valve box is connected with one suction valve box, each discharge valve box is provided with one cylinder sleeve, and each cylinder sleeve corresponds to one piston. The suction valve boxes and the discharge valve boxes are respectively provided with one-way valves, the one-way valves of the suction valve boxes are opened when the one-way valves of the discharge valve boxes are closed, and the one-way valves of the suction valve boxes are closed when the one-way valves of the discharge valve boxes are opened.

6. A low vibration, small volume, five cylinder mud pump according to claim 5, characterized in that, The second suction pipe is located above the anti-skid support panel at one end of the I-beam, and the height of the anti-skid support panel near the second suction pipe is lower than the height of the anti-skid support panel at the other end of the I-beam.

7. A low vibration, small volume, five cylinder mud pump as claimed in claim 3, wherein, The blowdown port extends to below the anti-skid support panel near the crankshaft assembly, the operation port is arranged on the anti-skid support panel near the crankshaft assembly, and the flip plate is hingedly installed on the anti-skid support panel at the edge of the operation port.

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