CN-117507213-B - Device and method for guaranteeing uniform glue injection wall thickness of equal-wall-thickness stator

CN117507213BCN 117507213 BCN117507213 BCN 117507213BCN-117507213-B

Abstract

The invention belongs to the technical field of drilling tools, and particularly relates to a device for guaranteeing uniform glue injection wall thickness of a stator with uniform wall thickness, which comprises an inner spiral positioning head, an outer spiral positioning head, a connecting rod, a base, a mandrel, an upper plug, a lower plug, an upper baffle, a lower baffle, a positioning bolt, an upper nut, a first nut and a second nut, wherein the inner spiral positioning head and the outer spiral positioning head are connected with the base through the connecting rod, the inner side of the inner spiral positioning head and the outer spiral positioning head are provided with inner spirals matched with the surface of the mandrel in a threaded manner, the upper plug is sleeved on one end of the mandrel, the upper baffle is sleeved on the mandrel and fixed by the upper nut, the lower plug is sleeved on the other end of the mandrel, the first nut is in threaded connection with the other end of the mandrel and is tightly pressed by the lower plug, the lower baffle is in threaded connection with the other end of the mandrel, and the positioning bolt penetrates through the side part of a stator shell with uniform wall thickness. The device can ensure that the rubber wall thickness is uniform after the stator of the screw drilling tool with equal wall thickness is injected, and the service life of the stator is prolonged.

Inventors

LIU ZHENWEI
LI JINFANG
Shi Yinxing
LUO XULIANG
YIN XIANGLI

Assignees

天津立林石油机械有限公司

Dates

Publication Date: 20260505
Application Date: 20231115

Claims (3)

1. The device for guaranteeing uniform glue injection wall thickness of the stator with the same wall thickness is characterized by comprising an inner spiral positioning head, an outer spiral positioning head, a connecting rod, a base, a mandrel, an upper plug, a lower plug, an upper baffle, a lower baffle, a positioning bolt, an upper nut, a first nut and a second nut, wherein the inner spiral positioning head and the outer spiral positioning head are connected with the base through the connecting rod; the device comprises the following steps that firstly, after an upper plug, an upper baffle and an upper nut are arranged on the fixed end of a mandrel, the mandrel is arranged in a stator shell with the same wall thickness from one end; The inner and outer spiral positioning heads are rotatably arranged in the annular space of the mandrel and the stator shell with the same wall thickness from the other end, and the mandrel is slightly rotated until the stator shell with the same wall thickness, the top of the mandrel spiral type valley and the bottom of the valley are completely aligned; Step three, fastening the stator shell with equal wall thickness and the mandrel by using a positioning bolt; Step four, pulling out the inner and outer spiral positioning heads in a rightward rotation way; step five, sequentially installing a lower plug, a first nut, a lower baffle and a second nut, and then injecting glue; And step six, removing the mandrel and other parts after the glue is formed.
2. The device for ensuring uniform wall thickness of the equal wall thickness stator glue injection device of claim 1, wherein a plurality of positioning bolts are uniformly distributed around the stator shell.
3. The device for guaranteeing uniform wall thickness of glue injection of a stator with uniform wall thickness according to claim 1, wherein the middle of the mandrel is of a hollow structure.

Description

Device and method for guaranteeing uniform glue injection wall thickness of equal-wall-thickness stator Technical Field The invention belongs to the technical field of drilling tools, and particularly relates to a device and a method for guaranteeing uniform glue injection wall thickness of a stator with equal wall thickness. Background The equal-wall-thickness stator is a core component of the equal-wall-thickness screw drill motor and consists of an equal-wall-thickness stator shell and a rubber lining. Connecting threads are required to be machined at two ends of the stator shell with the same wall thickness, the inner spiral line type is not arranged on the end face, the outer spiral line type of the mandrel is matched with the inner part of the stator shell with the same wall thickness, and visual alignment is not easy to achieve. When injecting glue, the uneven wall thickness of the rubber is unavoidable, but the rubber also completely covers the inner spiral surface of the stator, and the situation is difficult to detect after the glue is injected. The screw drilling tool with the feedback and equal wall thickness is used on site, the screw drilling tool is in failure after being used for a short time, and the situation of glue dropping and degumming is found after the screw drilling tool is disassembled. When the axial section is analyzed by sawing a failed equal wall thickness stator, the situation of fig. 6 is found, namely, the equal wall thickness stator shell, the valley top and the valley bottom of the mandrel are not aligned when glue is injected. Disclosure of Invention The invention aims to provide a roller bit which is safe, effective, low in cost, convenient to manufacture and capable of continuously dredging well for a long time. The device for guaranteeing the uniform wall thickness of the equal-wall-thickness stator glue injection comprises an inner spiral positioning head, an outer spiral positioning head, a connecting rod, a base, a mandrel, an upper plug, a lower plug, an upper baffle, a lower baffle, a positioning bolt, an upper nut, a first nut and a second nut, wherein the inner spiral positioning head and the outer spiral positioning head are connected with the base through the connecting rod, an inner spiral matched with the surface of the mandrel is arranged on the inner side of the inner spiral positioning head and the outer spiral positioning head, the upper plug is sleeved on one end of the mandrel, the upper baffle is sleeved on the mandrel and fixed by the upper nut, the lower plug is sleeved on the other end of the mandrel, the first nut is in threaded connection with the other end of the mandrel and is tightly pressed against the lower plug, the lower baffle is in threaded connection with the other end of the mandrel and then fixed by the second nut, and the positioning bolt penetrates through the side part of the equal-wall-thickness stator shell. Preferably, the positioning bolts are a plurality of and uniformly distributed around the stator shell. Preferably, the middle of the mandrel is a hollow structure. A method for ensuring uniform wall thickness of glue injection of a stator with equal wall thickness comprises the following steps: Step one, mounting an upper plug, an upper baffle plate and an upper nut on the fixed end of a mandrel, and then mounting the mandrel into a stator shell with the same wall thickness from one end; secondly, the inner and outer spiral positioning heads are rotatably installed in the annular space of the mandrel and the stator shell with the same wall thickness from the other end; Step three, fastening the stator shell with equal wall thickness and the mandrel by using a positioning bolt; Step four, pulling out the inner and outer spiral positioning heads in a rightward rotation way; step five, sequentially installing a lower plug, a first nut, a lower baffle and a second nut, and then injecting glue; And step six, removing the mandrel and other parts after the glue is formed. Preferably, in the second step, the mandrel is slightly rotated until the stator housing with equal wall thickness, the top and bottom of the helical valley of the mandrel are in perfect alignment, and the inner and outer helical positioning heads are not in place. The device has the beneficial effects that the device can ensure that the rubber wall thickness of the stator of the screw drilling tool with equal wall thickness is uniform after the stator is injected with the rubber, and the service life of the stator is prolonged. Drawings FIG. 1 is a perspective view of an inner and outer screw positioning head according to the present invention; FIG. 2 is a schematic view of the present invention with the inner and outer helical positioning heads installed inside the stator housing; FIG. 3 is a schematic view of a set screw locking mandrel of the present invention; FIG. 4 is a view showing the removal of the inner and outer helical positioning heads according to t