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CN-224200590-U - Erosion-preventing water cap for screw drilling tool

CN224200590UCN 224200590 UCN224200590 UCN 224200590UCN-224200590-U

Abstract

The utility model relates to the technical field of screw drilling tools, in particular to an erosion-preventing water cap for a screw drilling tool, which comprises a water cap, and a vertical hole and a horizontal hole which are arranged in the water cap, wherein the inner surfaces of the vertical hole and the horizontal hole are respectively provided with a plating layer, and the intersecting line of the vertical hole and the horizontal hole is subjected to chamfering treatment. According to the utility model, the strength of the inner walls of the vertical holes and the transverse holes can be increased by arranging the over-plating layer, the rapid corrosion of the inner walls of the vertical holes and the transverse holes is prevented, the service life of the device is influenced, the contact area between the vertical holes and the transverse holes is increased by chamfering the intersecting line of the vertical holes and the transverse holes, the use strength of the plating layer at the position is ensured, the corrosion resistance in the water cap is further ensured, the corrosion resistance effect can be ensured by selecting the material of the plating layer as hard chromium, the hard chromium strength is set to be more than 800HV, the thickness of the hard chromium is set to be more than 0.3mm, and the corrosion resistance can be ensured.

Inventors

  • LI XU

Assignees

  • 四川安普尔能源科技有限公司

Dates

Publication Date
20260505
Application Date
20250620

Claims (7)

  1. 1. The erosion-preventing water cap for the screw drilling tool is characterized by comprising a water cap (1), and a vertical hole (3) and a transverse hole (4) which are formed in the water cap (1), wherein a plating layer (2) is arranged on the inner surfaces of the vertical hole (3) and the transverse hole (4), and the intersecting line of the vertical hole (3) and the transverse hole (4) is subjected to chamfering treatment.
  2. 2. The erosion prevention water cap for a screw drill according to claim 1, wherein the plating layer (2) is obtained by electroplating, and the plating layer (2) is hard chromium as an electroplating material.
  3. 3. The erosion prevention cap for a screw drill according to claim 1, wherein the plating layer (2) is provided with a plating thickness of a >0.3mm.
  4. 4. The erosion prevention cap for a screw drill according to claim 1, wherein the plating strength of the plating layer (2) is set to b, and b >800HV.
  5. 5. The erosion prevention water cap for the screw drilling tool according to claim 1, wherein the adjacent surfaces of the inner wall of the vertical hole (3) and the inner wall of the horizontal hole (4) are respectively a vertical hole inner wall (301) and a horizontal hole inner wall (401), and the joint of the vertical hole inner wall (301) and the horizontal hole inner wall (401) is an intersecting line.
  6. 6. The erosion prevention cap for a screw drill according to claim 5, wherein the intersecting line is rounded to form a transition angle (5), the transition angle (5) is rounded to have a degree of R, and r=3.
  7. 7. A erosion prevention cap for a screw drill according to claim 1, wherein the mud flow direction is through the vertical hole (3) into the lateral hole (4).

Description

Erosion-preventing water cap for screw drilling tool Technical Field The utility model relates to the technical field of screw drilling tools, in particular to an erosion-preventing water cap for a screw drilling tool. Background The service life of the water cap of the screw drilling tool at present is generally about 200 hours, the inner hole is more severely eroded after use and cannot be reused, the strength is reduced after erosion, cracks are easily generated when the inner hole is rough and stressed, some foreign manufacturers adopt advanced processes to spray tungsten carbide at the erosion surface in a supersonic mode, the service life can reach more than 500 hours, however, due to the small structure and size of the water cap, equipment required for spraying the water cap is too accurate and complex, and the practical effect of the water cap is affected. Therefore, a water erosion prevention cap for a screw drill is proposed to solve the above-mentioned problems. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides an erosion-preventing water cap for a screw drilling tool, which can solve the problems of low corrosion resistance and high cost of processing equipment. The technical scheme includes that the water cap comprises a water cap body, and a vertical hole and a horizontal hole which are formed in the water cap body, wherein plating layers are arranged on the inner surfaces of the vertical hole and the horizontal hole, and the intersecting line of the vertical hole and the horizontal hole is subjected to chamfering treatment. Preferably, the plating layer is obtained by electroplating treatment, and the plating layer electroplating material is hard chromium. Preferably, the plating thickness of the plating layer is set to a, and a >0.3mm. Preferably, the plating strength of the plating layer is set to b, and b >800HV. Preferably, the adjacent surfaces of the inner wall of the vertical hole and the inner wall of the transverse hole are respectively the inner wall of the vertical hole and the inner wall of the transverse hole, and the joint of the inner wall of the vertical hole and the inner wall of the transverse hole is an intersecting line. Preferably, the intersecting line forms a transition angle through rounding, the degree of rounding of the transition angle is set to R, and r=3. Preferably, the mud flow direction is through the vertical holes into the horizontal holes. Compared with the prior art, the utility model provides the erosion prevention water cap for the screw drilling tool, which has the following beneficial effects: 1. The setting of passing the cladding material can increase the intensity of vertical hole and cross bore inner wall, prevents that it from producing the condition of being corroded fast, influences the life of device to through handling vertical hole and cross bore intersecting line chamfer, improve the area of contact of this department and cladding material, guarantee the intensity that the cladding material used in this department, further guarantee the anticorrosive intensity in the water cap. 2. The anti-impact corrosion effect can be ensured by selecting the material of the plating layer as hard chromium, setting the strength of the hard chromium to be more than 800HV, setting the thickness of the hard chromium to be more than 0.3mm, and ensuring the anti-corrosion capability of the hard chromium. 3. The inner hole is added with a coating, and the hardness of the coating is very high, so that the erosion of the inner walls of the vertical holes and the transverse holes is avoided, the water cap substrate is protected from being damaged, and the purpose of prolonging the service life of the water cap is achieved. Drawings FIG. 1 is a schematic cross-sectional structure of the present utility model; FIG. 2 is a schematic view of a vertical cross-section structure of the present utility model; FIG. 3 is a schematic view of the structure at the intersecting line of the present utility model; FIG. 4 is a schematic view of the mud trend structure of the present utility model. In the figure, 1 part of the water cap, 2 parts of the coating, 3 parts of the vertical hole, 301 parts of the inner wall of the vertical hole, 4 parts of the horizontal hole, 401 parts of the inner wall of the horizontal hole and 5 parts of the transition angle. Detailed Description The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. Examples: Referring to fig. 1-4, an erosion prevention water cap for a s