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CN-224200629-U - Novel fracturing valve box inner cavity structure capable of improving bearing capacity

CN224200629UCN 224200629 UCN224200629 UCN 224200629UCN-224200629-U

Abstract

The utility model discloses a novel fracturing valve box inner cavity structure capable of improving pressure bearing capacity, which comprises a fracturing valve box body, wherein a plurality of cross cavities are arranged in the fracturing valve box body, the cross cavities are linearly arranged along the side edges of the fracturing valve box body, the middle part of each cross cavity is provided with a cross cavity center, two side edges of each cross cavity center are cross corners, the right end of each cross cavity is provided with a suction hole, the upper end of each cross cavity is provided with a plunger hole, the suction holes are mutually perpendicular to the plunger holes and are in through connection with the cross cavities, the cross corners are the positions with the largest internal stress values of the fracturing valve box body, and the cross corners are formed into chamfer edges through machining. According to the utility model, the inner cavity of the fracturing valve box is subjected to structural optimization, and the optimized structure is subjected to stress measurement in the simulation process, so that the optimized structure is determined, the stress concentration degree of the inner cavity in the working state is effectively reduced, the bearing capacity is improved, and the service life is prolonged.

Inventors

  • LI QI
  • WU KEYUAN
  • WU JI
  • SI TINGZHI

Assignees

  • 马鞍山旭阳机械有限公司

Dates

Publication Date
20260505
Application Date
20250617

Claims (6)

  1. 1. The novel fracturing valve box inner cavity structure capable of improving bearing capacity comprises a fracturing valve box body (1) and is characterized in that a plurality of cross cavities are arranged in the fracturing valve box body (1), the cross cavities are linearly arranged along the side edges of the fracturing valve box body (1), a cross cavity center (3) is arranged in the middle of each cross cavity, two side edges of each cross cavity center (3) are cross corners (2), a suction hole is formed in the right end of each cross cavity, a plunger hole is formed in the upper end of each cross cavity, and suction and plunger holes are mutually perpendicular and are connected through the cross cavities.
  2. 2. The novel fracturing valve box inner cavity structure for improving bearing capacity according to claim 1, wherein the cross corner (2) is the position with the largest internal stress value of the fracturing valve box body (1), the cross corner (2) is formed into a chamfer edge (4) through machining, and the angle of the chamfer edge (4) is forty-five degrees.
  3. 3. The novel fracturing valve box inner cavity structure for improving bearing capacity according to claim 1, wherein the cross corner (2) is the position with the largest internal stress value of the fracturing valve box body (1), the cross corner (2) is formed into a round corner edge (5) through machining, and the size of the round corner edge (5) is 4mm.
  4. 4. The novel fracturing valve box inner cavity structure for improving bearing capacity according to claim 1, wherein a plurality of valve seats (6) are fixedly arranged at the front end of the fracturing valve box body (1), suction hole pressing covers (9) are connected to the inner sides of the front ends of the valve seats (6) through threads, a plurality of plunger pressing covers (10) are connected to the inner sides of the upper ends of the fracturing valve box body (1) through threads, and the suction hole pressing covers (9) and the plunger pressing covers (10) are respectively inserted into the inner sides of the suction hole and the plunger hole and are linearly arranged along the side edges of the fracturing valve box body (1).
  5. 5. The novel fracturing valve box inner cavity structure for improving bearing capacity according to claim 4, wherein discharge hole pressing covers (8) are fixedly arranged at two ends of the fracturing valve box body (1), a plurality of discharge flange holes (7) are formed in one side of each discharge hole pressing cover (8), and two discharge hole pressing covers (8) are symmetrically arranged relative to the fracturing valve box body (1).
  6. 6. The novel fracturing valve box inner cavity structure for improving bearing capacity according to claim 5, wherein the fracturing valve box body (1) is made of 15-5PH stainless steel, the density rho=7833 kg/m 3 of the fracturing valve box body (1), the Poisson ratio is 0.2755, the tensile strength is 1000MPa, the yield strength is 900MPa, the elongation after break is 17%, and the area reduction is 45%.

Description

Novel fracturing valve box inner cavity structure capable of improving bearing capacity Technical Field The utility model relates to the technical field of petroleum exploitation equipment, in particular to a novel fracturing valve box inner cavity structure capable of improving bearing capacity. Background The fracturing valve box is an important part in the field of oil exploitation and yield increasing operation, and is widely applied to oil fields, gas fields and other resources and yield increasing construction industries. The power source of the fracturing valve box is divided into a power end and a hydraulic end, the power end transmits kinetic energy provided by a diesel engine or a motor to the hydraulic end through a plunger, and then the hydraulic end pressurizes liquid in a sealed fracturing valve cavity to complete the fracturing process. In the fracturing process, the valve box inner cavity is subjected to larger compressive stress, and the longer-term hydraulic operation brings larger compressive stress effect, so that the inner cavity of the fracturing valve box is finally worn, and when the inner cavity of the valve box is worn to a larger extent, the service life of the valve box is limited. The stress distribution condition of the inner cavity of the fracturing valve box is researched, the failure risk faced by the valve box is helped to be known, and improvement measures such as improvement of valve box materials or structures are provided, so that the method has great significance in prolonging the service life of the fracturing valve box. The inner cavity structure of the existing fracturing valve box has high stress concentration degree and poor bearing capacity in the application process, so that the service life is influenced; therefore, the existing requirements are not met, and a novel fracturing valve box inner cavity structure capable of improving the bearing capacity is provided. Disclosure of utility model The utility model aims to provide a novel fracturing valve box inner cavity structure capable of improving bearing capacity, so as to solve the problems that in the prior art, the inner cavity structure of the existing fracturing valve box is high in stress concentration degree in the application process, poor in bearing capacity and further influenced in service life. In order to achieve the above purpose, the novel fracturing valve box inner cavity structure capable of improving the bearing capacity comprises a fracturing valve box body, wherein a plurality of cross cavities are arranged in the fracturing valve box body, the cross cavities are linearly arranged along the side edges of the fracturing valve box body, the middle of each cross cavity is provided with a cross cavity center, two side edges of each cross cavity center are cross corners, the right end of each cross cavity is provided with a suction hole, and the upper end of each cross cavity is provided with a plunger hole, and suction holes are mutually perpendicular to the plunger holes and are in through connection with the cross cavities. Preferably, the cross corner is the position with the largest internal stress value of the fracturing valve box body, the cross corner is formed into a chamfer edge through machining, and the angle of the chamfer edge is forty-five degrees. Preferably, the cross corner is the position with the largest internal stress value of the fracturing valve box body, the cross corner is formed into a round corner edge through machining, and the size of the round corner edge is 4mm. Preferably, the front end of the fracturing valve box body is fixedly provided with a plurality of valve seats, the inner side of the front end of the valve seats is connected with a suction hole gland through threads, the inner side of the upper end of the fracturing valve box body is connected with a plurality of plunger glands through threads, and the suction hole gland and the plunger glands are respectively inserted into the inner sides of the suction hole and the plunger holes and are linearly arranged along the side edges of the fracturing valve box body. Preferably, two ends of the fracturing valve box body are fixedly provided with drain hole pressing covers, one side of each drain hole pressing cover is provided with a plurality of drain flange holes, and two drain hole pressing covers are symmetrically arranged relative to the fracturing valve box body. Preferably, the material of the fracturing valve box body is 15-5PH stainless steel, the density rho=7833 kg/m 3 of the fracturing valve box body is 0.2755, the tensile strength is 1000MPa, the yield strength is 900MPa, the elongation after fracture is 17%, and the area shrinkage is 45%. Compared with the prior art, the utility model has the beneficial effects that: According to the utility model, stress distribution of the cross cavity is simulated through ANSYS-Workbench software, the cross corner is respectively machined and molded into the cham