CN-121761185-B - Water inlet pipe connection structure

CN121761185BCN 121761185 BCN121761185 BCN 121761185BCN-121761185-B

Abstract

The invention relates to the technical field of water pipe connection, in particular to a water inlet pipe connection structure; the hydraulic impact self-adaptive hydraulic impact cutting sleeve comprises a body, a nut, a cutting sleeve, a fixing mechanism for reinforcing pipeline connection and an actuating mechanism for converting hydraulic energy, wherein the design of cutting edges is replaced by bushing wrapping, the actuating mechanism is integrated with the self-adaptive hydraulic impact cutting sleeve, the problem of failure of the traditional cutting sleeve connection in a hydraulic environment is solved, particularly, the fixing mechanism replaces a harmful cutting manner in a nondestructive wrapping manner, damage and stress concentration hidden dangers of the pipeline body are eradicated, a long-term reliable static connection foundation is formed, meanwhile, the actuating mechanism converts dynamic impact into instant locking force in real time, and the loosening trend caused by impact is actively resisted.

Inventors

SUN YIFEI
WANG JINSHI

Assignees

泰州市玖胜金属制品有限公司

Dates

Publication Date: 20260512
Application Date: 20260302

Claims (4)

1. The water inlet pipe connecting structure comprises a body, a nut and a clamping sleeve, and is characterized by further comprising a fixing mechanism for reinforcing pipeline connection and an actuating mechanism for converting water hammer energy; The fixing mechanism comprises a locking ring and a bushing, wherein a pipeline to be connected sequentially passes through the nut, a clamping sleeve, the locking ring and the bushing, the outer surface of the clamping sleeve is a conical surface I matched with a conical surface arranged at a port of the locking ring, and a rubber press block extruded by the pipeline is arranged at the port of the clamping sleeve; The actuating mechanism comprises an eliminator which is communicated with the upper part of the body, two cylinders are communicated with the upper part of the eliminator, piston rods are slidably installed in the cylinders, pushing components which are in one-to-one correspondence with the nuts are arranged on the body, the pushing components are formed by two L-shaped pushing plates which are slidably installed on the front side and the rear side of the body, a driving part is arranged on the body, and a connecting part is arranged between the pushing plates and the corresponding clamping sleeves; The piston rod responds to the water hammer pressure to drive the driving part, the driving part drives the pushing plate to move, the pushing plate converts the impact force of the water hammer into additional axial pressing force on the clamping sleeve through the connecting part, and the nut is synchronously limited to rotate; the driving part comprises connecting rods which are rotatably arranged on the body and correspond to the pushing plates one by one, waist slots are formed in two ends of each connecting rod, guide posts which penetrate through waist slots below the corresponding connecting rods in a sliding mode are fixedly arranged on the pushing plates, a fixing plate is fixedly arranged at one end, away from the eliminator, of each piston rod, after the piston rod penetrates through the cylinder in a sliding mode, a driving rod which penetrates through the waist slots above the corresponding connecting rods in a sliding mode is fixedly arranged on the fixing plate; The connecting part comprises sliding columns, a plurality of sliding columns are uniformly and fixedly arranged at the ends, far away from each other, of the two clamping sleeves along the circumferential direction of the sliding columns, fixing rings are fixedly arranged after the sliding columns slide through corresponding nuts, limit columns which are in one-to-one correspondence with the pushing plates are fixedly arranged at the ends, far away from the nuts, of the fixing rings, and the limit columns slide through the corresponding pushing plates; The inner surface of the locking ring is densely provided with saw teeth, the tooth profile section of the locking ring is of an asymmetric structure, and the tooth surface angle facing the inside of the joint body is steeper than the tooth surface angle facing the nut; The inner wall of the bushing is provided with microscopic insections or knurls for enhancing the binding force with the surface of the pipeline; the liner is made of a soft metal having a ductility higher than the pipe material; The rotation point of the connecting rod is close to one side of the corresponding pushing plate.
2. The water inlet pipe connecting structure according to claim 1, wherein a sealing ring is arranged at the end part of the pipeline, which is attached to the body.
3. The water inlet pipe connecting structure according to claim 1, wherein the edge of the nut port is provided with a guide slope.
4. The water inlet pipe connecting structure according to claim 1, wherein the nut port is provided with a buffer pad.

Description

Water inlet pipe connection structure Technical Field The invention relates to the technical field of water pipe connection, in particular to a water inlet pipe connection structure. Background In a fluid conveying system, a water inlet pipe connecting structure is a key for ensuring pipeline sealing communication and medium leakage-free conveying, and is generally connected through welding, flanges, threads, clamping sleeves and the like, wherein the clamping sleeves are connected to be widely applied to frequent maintenance occasions with the advantages of compact structure and convenience in assembly and disassembly, the core of the fluid conveying system is composed of a joint body, a compression nut and a clamping sleeve with a cutting edge, the screw nut is screwed during installation to push the clamping sleeve to move forward and be constrained by the conical surface of the inner wall of the joint body, so that the cutting edge of the clamping sleeve is radially contracted to cut into a pipe wall, and sealing and fastening are realized. The structure is applied to environments with severe pressure fluctuation such as a water inlet pipeline, the water hammer effect refers to the phenomenon that fluid momentum suddenly changes due to rapid opening and closing of a valve or a water pump in a pipeline, pressure is caused to rapidly rise in a very short time and form shock waves, periodic and high-frequency impact load has obvious damage to a connecting part, for the traditional mode of locally cutting and fixing a cutting edge of a cutting sleeve, continuous water hammer impact is extremely easy to cause cyclic stress at the meshing part of the cutting sleeve and a pipe wall, micro-motion abrasion is aggravated, the plastic deformation area of the cutting part gradually loses tightness due to stress relaxation, the sealing performance and the anti-pulling capacity of the connection are finally weakened, the potential risk of system leakage is formed, the traditional cutting edge is mainly cut into the outer wall of the pipeline directly due to sharpness of the traditional cutting sleeve connection, a sharp annular groove is formed on the surface of the pipeline under the water hammer effect, serious local stress concentration is caused, and fatigue crack is extremely easy to occur from the position under alternating impact load. Therefore, the problems of insufficient long-term stability, easy sealing failure and connection looseness of the traditional cutting sleeve type connection under the impact of a water hammer exist due to the fact that the traditional cutting sleeve type connection depends on inherent stress concentration and weak cyclic load resistance caused by cutting edges into a pipeline, and the traditional cutting sleeve type connection is a technical problem to be solved by a person skilled in the art. Disclosure of Invention In view of the above, the present invention provides a water inlet pipe connection structure to solve the above-mentioned technical problems. In order to achieve the purpose, the water inlet pipe connecting structure comprises a body, a nut, a clamping sleeve, a fixing mechanism for reinforcing pipe connection and an actuating mechanism for converting water hammer energy. The fixing mechanism comprises a locking ring and a bushing, a pipeline to be connected sequentially passes through the nut, a clamping sleeve, the locking ring and the bushing, the outer surface of the clamping sleeve is a conical surface I matched with a conical surface arranged at a port of the locking ring, a rubber pressing block extruded by the pipeline is arranged at the port of the clamping sleeve, the outer surface of the locking ring is a conical surface II matched with a conical surface arranged at an inner cavity of the port of the body, the locking ring is driven by screwing the nut to push the clamping sleeve to axially drive the locking ring, and the locking ring radially contracts to extrude the bushing to disperse and transmit and hold the pipeline tightly. The actuating mechanism comprises an eliminator which is communicated with the upper part of the body, two cylinders are communicated with the upper part of the eliminator, piston rods are slidably mounted in the cylinders, pushing components which are in one-to-one correspondence with the nuts are arranged on the body, the pushing components are formed by two L-shaped pushing plates which are slidably mounted on the front side and the rear side of the body, driving parts are arranged on the body, and connecting parts are arranged between the pushing plates and corresponding clamping sleeves. The piston rod responds to the water hammer pressure to drive the driving part, the driving part drives the pushing plate to move, the pushing plate converts the impact force of the water hammer into additional axial pressing force to the clamping sleeve through the connecting part, and the nut is synchronously limited to rotate. As the pre