Plunger high-pressure pump with cylinder sleeve convenient to replace

Abstract

The utility model discloses a plunger high-pressure pump with a cylinder sleeve convenient to replace, and relates to the technical field of plunger high-pressure pumps. A front-back through hole is formed in the pump body, the through hole of the pump body is in clearance fit connection with the cylinder sleeve, the cylinder sleeve, the plunger and the packing gland form a sealing chamber, the cylinder sleeve is provided with a flange at the front end of the pump body, the flange of the cylinder sleeve is connected with the pump body through a bolt, the cylinder sleeve is provided with a sealing ring at the front end of the pump body and is sealed with the pump body, and the cylinder sleeve is connected with an end cover at the front end of the flange through a bolt and the sealing ring. The cylinder sleeve is provided with a lower liquid passing hole at the liquid inlet one-way valve, and is provided with an upper liquid passing hole at the liquid outlet one-way valve. The utility model has the beneficial effects that the cylinder sleeve is connected with the pump body from the front end, the cylinder sleeve is provided with the upper liquid passing hole and the lower liquid passing hole, the working structure of the original pump body is not changed, and the cylinder sleeve can be moved out of the pump body and lifted out by a crane only by disassembling a bolt of the flange and screwing a bolt of the packing gland during disassembly. The whole process can be completed by only one operator, and the maintenance time is short.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plunger high pressure pump, especially to a plunger high pressure pump convenient to replace cylinder sleeve. BACKGROUND

[0002] The plunger high pressure pump is a volume pump widely used in petrochemical, oil field, environmental protection and other high pressure, large flow and high power, and liquid is sucked and pumped by reciprocating operation of the plunger, in order to reduce the maintenance cost, a cylinder sleeve is separately designed on the outer side of the plunger, so as to prolong the service life of the whole pump body, the cylinder sleeve is fixedly connected with the pump body, the cylinder sleeve, the plunger and the packing gland form a sealing chamber (as shown in the accompanying drawings), when the cylinder sleeve needs to be repaired and replaced, the plunger and the packing gland need to be disassembled, and then the cylinder sleeve is pulled out from the pump body by using a special tool, so that the maintenance workload is large and the time is long. Fig. 1 UTILITY MODEL CONTENTS

[0003] In order to solve the problem that the workload is large when the plunger high pressure pump is repaired and the cylinder sleeve is replaced, the utility model provides a plunger high pressure pump convenient to replace cylinder sleeve.

[0004] The utility model provides a technical scheme: a plunger high pressure pump convenient to replace cylinder sleeve, including pump body, the pump body is installed with liquid inlet check valve and liquid outlet check valve, the pump body is opened with the through hole that penetrates front and back, the through hole gap fit connection cylinder sleeve of pump body, cylinder sleeve, plunger and packing gland form a sealed chamber, the sealed chamber is filled with sealing material, the front end of cylinder sleeve is equipped with flange in pump body, the flange of cylinder sleeve is connected pump body through bolt, the front end of cylinder sleeve is equipped with sealing ring and pump body seal in liquid inlet check valve, liquid outlet check valve front end of pump body, the front end of cylinder sleeve is connected end cover through bolt, sealing ring, cylinder sleeve is opened with lower liquid hole in liquid inlet check valve position, and cylinder sleeve is opened with upper liquid hole in liquid outlet check valve position.

[0005] The connecting hole of flange is uniformly distributed in circumference, the number of connecting hole is seven, and an notch is formed outside one connecting hole of the outer circle of flange, the notch is located at the upper part when being installed, the upper liquid hole corresponds to the position of liquid outlet check valve, and the lower liquid hole corresponds to the position of liquid inlet check valve.

[0006] The size of the inner hole of cylinder sleeve at the front end part of pump body is larger than the size of the stroke part of plunger.

[0007] The utility model has the advantages that the cylinder sleeve is connected with the pump body from the front end, the cylinder sleeve is provided with upper liquid hole and lower liquid hole, the working structure of the original pump body is not changed, when being disassembled, only the bolt of flange needs to be disassembled, the bolt of packing gland is screwed, the cylinder sleeve can be removed from the pump body, the whole process can be completed by only one operator, the maintenance time is short, and no special tool is needed. DRAWINGS

[0008] ATTACH​Fig. 1 is the schematic diagram of the existing plunger high-pressure pump structure;

[0009] attached Fig. 2 the schematic diagram of the structure of the utility model;

[0010] attached Fig. 3 is the left view of the cylinder sleeve in the utility model.

[0011] In the figure, 1-pump body, 2-cylinder sleeve, 3-plunger, 4-stuffing box, 5-flange, 6-end cover, 7-lower liquid passage, 8-upper liquid passage, 9-notch, 10-connection hole, 11-liquid inlet check valve, 12-liquid outlet check valve. DETAILED DESCRIPTION

[0012] As Figs. 1-3 shown, a plunger high-pressure pump convenient for replacing cylinder sleeve, comprising a pump body 1, the pump body 1 is installed with liquid inlet check valve 11 and liquid outlet check valve 12, the through hole that is opened in the pump body 1 is through and through to front and back, the through hole clearance fit connection cylinder sleeve 2 of the pump body 1, cylinder sleeve 2, plunger 3 and stuffing box 4 form sealed chamber, the sealed chamber is filled with sealing material, the flange 5 of cylinder sleeve 2 is provided at the front end of pump body 1, the flange 5 of cylinder sleeve 2 is connected pump body 1 by bolt, the sealing ring of cylinder sleeve 2 is provided at the front end of liquid inlet check valve 11, liquid outlet check valve 12 of pump body 1 is sealed, the end cover 6 of cylinder sleeve 2 is connected through bolt, sealing ring at the front end of flange 5, plunger 3 can be taken out from the front end by disassembling end cover 6, the lower liquid passage 7 is opened in the position of liquid inlet check valve 11 of cylinder sleeve 2, the upper liquid passage 8 is opened in the position of liquid outlet check valve 12 of cylinder sleeve 2.

[0013] Cylinder sleeve 2 is connected with pump body 1 from the front end, cylinder sleeve 2 is opened with upper liquid passage 8 and lower liquid passage 7, without changing the working structure of original pump body 1, when disassembling, only need to disassemble the bolt of flange 5, and the bolt of stuffing box 4 is tightened, cylinder sleeve 2 can be removed from pump body 1, and is lifted out by crane, the whole process can be completed by only one operator, and the maintenance time is short.

[0014] The connection hole 10 of flange 5 is uniformly distributed in circumference, the number of connection hole 10 is seven, one notch 9 is opened outside one connection hole 10 of outer circle of flange 5, the notch 9 is located at upper portion when installing, the upper liquid passage 8 corresponds to the position of liquid outlet check valve 12, the lower liquid passage 7 corresponds to the position of liquid inlet check valve 11, to avoid the damage of pump body 1 caused by the installation error of upper liquid passage 8 and lower liquid passage 7 direction.

[0015] The size of the inner hole of cylinder sleeve 2 at the front end part of pump body 1 is greater than the size of the stroke position of plunger 3, so that plunger 3 is more easily pushed out of cylinder sleeve 2 during maintenance.

Claims

1. A plunger high-pressure pump with easily replaceable cylinder liners, comprising a pump body (1), characterized in that: The pump body (1) is equipped with an inlet check valve (11) and an outlet check valve (12). The pump body (1) has a through hole that runs from front to back. The through hole of the pump body (1) is fitted with a cylinder liner (2). The cylinder liner (2), the plunger (3), and the packing gland (4) form a sealing chamber. The sealing chamber is filled with sealing material. The cylinder liner (2) has a flange (5) at the front end of the pump body (1). The flange (5) of the cylinder liner (2) is connected to the pump body (1) by bolts. The cylinder liner (2) has a sealing ring at the front end of the inlet check valve (11) and the outlet check valve (12) of the pump body (1) to seal with the pump body (1). The cylinder liner (2) is connected to the end cover (6) at the front end of the flange (5) by bolts and a sealing ring. The cylinder liner (2) has a lower liquid passage hole (7) at the position of the inlet check valve (11) and an upper liquid passage hole (8) at the position of the outlet check valve (12).

2. The plunger high-pressure pump with easily replaceable cylinder liners according to claim 1, characterized in that: The flange (5) has seven connecting holes (10) evenly distributed around its circumference. The flange (5) has a notch (9) on the outer side of one of the connecting holes (10). When the notch (9) is located at the top, the upper liquid passage (8) corresponds to the position of the liquid outlet check valve (12), and the lower liquid passage (7) corresponds to the position of the liquid inlet check valve (11).

3. A plunger high-pressure pump with easily replaceable cylinder liners according to claim 1, characterized in that: The inner diameter of the cylinder liner (2) at the front end of the pump body (1) is larger than the diameter of the piston (3) at the stroke location.

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