Screw pump with stator convenient to replace

Abstract

The utility model discloses a screw pump with a stator convenient to replace, and relates to the technical field of screw pumps. A rear flange is arranged on the left side of the feeding section, a front flange is arranged on the right side of the discharging section, the front flange and the rear flange clamp a stator assembly, a telescopic pipe is welded to the left side of the front flange, a supporting pipe is arranged on the right side of the discharging section, the telescopic pipe extends into the supporting pipe, and the telescopic pipe and the supporting pipe are in clearance fit connection through a sealing ring. The beneficial effects of the utility model are that the telescopic pipe and the supporting pipe are arranged between the stator assembly and the discharging section, the telescopic pipe can move left and right, the installation of the stator assembly can be completed by locking the telescopic pipe through the wedge-shaped block, the locking of the wedge-shaped block can be released, the telescopic pipe can be retracted, and the stator assembly can be disassembled; the stator assembly can be replaced without disassembling a process pipeline and a flange bolt, and residual waste liquid does not fall to the ground.

Description

Technical Field

[0001] The utility model relates to the field of screw pumps, in particular to a screw pump with convenient stator replacement. Background Art

[0002] The rubber stator of an ordinary screw pump is a wearing part and needs to be replaced regularly according to the degree of wear. To replace the stator, the process pipeline connected to the discharge pipe must be removed, the two flanges clamping the rubber stator must be removed, and the stator casing must be removed before the stator can be replaced. Replacing and maintaining the stator is labor-intensive, the operation cycle is long, and waste liquid on site falls to the ground, causing pollution. Utility Model Content

[0003] In order to solve the problem that it is time-consuming and laborious to replace the stator of an ordinary screw pump and the operation cycle is long, the utility model provides a screw pump with convenient stator replacement.

[0004] The technical solution provided by the utility model is: a screw pump with convenient stator replacement, comprising a screw pump composed of a base, a feed section, a stator assembly, a discharge section, a bearing chamber and a motor, the stator assembly comprising an internal rubber stator and an external stator sleeve, a rear flange is provided on the left side of the feed section, a front flange is provided on the right side of the discharge section, the front flange and the rear flange clamp the stator assembly, a telescopic tube is welded on the left side of the front flange, a support tube is provided on the right side of the discharge section, the telescopic tube extends into the support tube, and the telescopic tube and the support tube are connected through a sealing ring gap fit;

[0005] A bevel is processed on the left end of the telescopic tube, and threaded holes, half-section holes and square grooves are processed on the tube wall of the support tube from top to bottom. The square groove is connected with a wedge block through clearance fit. The right side of the wedge block is an inclined surface, and the angle of the inclined surface of the wedge block is consistent with the angle of the bevel of the telescopic tube. A countersunk hole is opened on the upper part of the wedge block, and the countersunk hole of the wedge block is connected to the lifting shaft through a shaft retaining ring. The lifting shaft is connected to the half-section hole through a sealing ring clearance fit. A threaded column is processed on the upper part of the lifting shaft, and the threaded column is threadedly connected to the support tube, and the support tube has a bracket connected to the base.

[0006] The travel of the extension tube is greater than the length of the stator assembly.

[0007] The base is provided with a material receiving box at the lower part of the stator assembly.

[0008] The threaded column is threadedly connected to the cap on the upper part of the support tube.

[0009] The beneficial effects of the utility model are as follows: by arranging a telescopic tube and a support tube between the stator assembly and the discharge section, the telescopic tube can be moved left and right, and the stator assembly can be installed by locking the telescopic tube through a wedge block, and the telescopic tube can be retracted and the stator assembly can be disassembled by releasing the lock of the wedge block, and the stator assembly can be replaced without disassembling the process pipeline and disassembling the flange bolts, and residual waste liquid will not fall to the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Attached Figure 1 It is a structural schematic diagram of the utility model;

[0011] Attached Figure 2 Attached Figure 1 A magnified image of point A;

[0012] Attached Figure 3 It is a working diagram of the utility model.

[0013] In the figure, 1-base, 2-stator assembly, 3-feeding section, 4-discharge section, 5-bearing chamber, 6-motor, 7-rear flange, 8-front flange, 9-telescopic tube, 10-support tube, 11-receiving box, 12-bevel, 13-wedge block, 14-lifting shaft, 15-threaded column, 16-cap, 17-square groove, 18-half-section hole. DETAILED DESCRIPTION

[0014] like Figures 1 to 3 As shown, a screw pump for convenient stator replacement includes a screw pump composed of a base 1, a feed section 3, a stator assembly 2, a discharge section 4, a bearing chamber 5 and a motor 6. The stator assembly 2 includes an internal rubber stator and an external stator sleeve. A rear flange 7 is provided on the left side of the feed section 3, and a front flange 8 is provided on the right side of the discharge section 4. The front flange 8 and the rear flange 7 clamp the stator assembly 2. A telescopic tube 9 is welded on the left side of the front flange 8. A support tube 10 is provided on the right side of the discharge section 4. The telescopic tube 9 extends into the support tube 10. The telescopic tube 9 and the support tube 10 are connected by a sealing ring gap fit.

[0015] A groove 12 is processed on the left end of the telescopic tube 9, and a threaded hole, a half-hole 18 and a square groove 17 are processed on the tube wall of the support tube 10 from top to bottom. The square groove 17 is connected to the wedge block 13 with a clearance fit. The right side of the wedge block 13 is an inclined surface, and the angle of the inclined surface of the wedge block 13 is consistent with the angle of the groove 12 of the telescopic tube 9. A countersunk hole is opened on the upper part of the wedge block 13, and the countersunk hole of the wedge block 13 is connected to the lifting shaft 14 through a shaft retaining ring, so that the wedge block 13 and the lifting shaft 14 are axially locked. The lifting shaft 14 is connected to the half-hole 18 through a sealing ring clearance fit, and a threaded column 15 is processed on the upper part of the lifting shaft 14. The threaded column 15 is threadedly connected to the support tube 10, and the support tube 10 has a bracket connected to the base 1.

[0016] The travel of the telescopic tube 9 is greater than the length of the stator assembly 2 .

[0017] The base 1 is provided with a material receiving box 11 at the lower part of the stator assembly 2 to prevent waste liquid from falling to the ground when the stator assembly 2 is maintained and replaced.

[0018] The threaded column 15 is threadedly connected to the cap 16 on the upper part of the support tube 10, and the cap 16 locks the threaded column 15 to prevent the threaded column 15 from loosening due to vibration during the operation of the screw pump, thereby causing leakage of the stator assembly 2.

[0019] When replacing the stator assembly 2, use a wrench to remove the cap 16, rotate the threaded column 15 to raise the lifting shaft 14, unlock the telescopic tube 9, move the telescopic tube 9 to the left, and then remove the old stator assembly 2. At the same time, install the new stator assembly 2, then move the telescopic tube 9 to the right, fit the front flange 8 to the stator assembly 2, and then tighten the threaded column 15. The lifting shaft 14 descends, the wedge block 13 descends, and the inclined surface of the wedge block 13 pushes the telescopic tube 9 to continue to move toward the stator assembly 2 until the stator assembly 2 is sealed and installed. Then the cap 16 is tightened to lock the threaded column 15.

[0020] By arranging a telescopic tube 9 and a support tube 10 between the stator assembly 2 and the discharge section 4, the telescopic tube 9 can be moved left and right. The installation of the stator assembly 2 can be completed by locking the telescopic tube 9 through the wedge block 13. The telescopic tube 9 can be retracted by releasing the lock of the wedge block 13, and the stator assembly 2 can be disassembled. The stator assembly 2 can be replaced without disassembling the process pipeline and disassembling the flange bolts, and the residual waste liquid will not fall to the ground.

Claims

1. A screw pump with convenient stator replacement, comprising a screw pump consisting of a base (1), a feed section (3), a stator assembly (2), a discharge section (4), a bearing chamber (5) and a motor (6), characterized in that: The stator assembly (2) comprises an internal rubber stator and an external stator sleeve, a rear flange (7) is provided on the left side of the feed section (3), a front flange (8) is provided on the right side of the discharge section (4), the front flange (8) and the rear flange (7) clamp the stator assembly (2), a telescopic tube (9) is welded on the left side of the front flange (8), a support tube (10) is provided on the right side of the discharge section (4), the telescopic tube (9) extends into the support tube (10), and the telescopic tube (9) and the support tube (10) are connected by a sealing ring gap fit; The left end of the telescopic tube (9) is processed with a groove (12), and the tube wall of the support tube (10) is processed with a threaded hole, a half hole (18) and a square groove (17) from top to bottom. The square groove (17) is connected with a wedge block (13) by clearance fit. The right side of the wedge block (13) is an inclined surface. The angle of the inclined surface of the wedge block (13) is consistent with the angle of the groove (12) of the telescopic tube (9). The upper part of the wedge block (13) is provided with a countersunk hole. The countersunk hole of the wedge block (13) is connected with a lifting shaft (14) through a shaft retaining ring. The lifting shaft (14) is connected with the half hole (18) through a sealing ring. The upper part of the lifting shaft (14) is processed with a threaded column (15). The threaded column (15) is threadedly connected to the support tube (10). The support tube (10) has a bracket connected to the base (1).

2. A screw pump with convenient stator replacement according to claim 1, characterized in that: The travel of the telescopic tube (9) is greater than the length of the stator assembly (2).

3. A screw pump with convenient stator replacement according to claim 1, characterized in that: The base (1) is provided with a material receiving box (11) at the lower part of the stator assembly (2).

4. A screw pump with convenient stator replacement according to claim 1, characterized in that: The threaded column (15) is threadedly connected to the cap (16) on the upper part of the support tube (10).

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