A forged anti-loose pipe clamp structure for high-pressure grooved pipe joints

Abstract

This utility model discloses a forged anti-loosening pipe clamp structure for high-pressure grooved pipe joints, including a pair of symmetrically arranged arc-shaped clamping ring components. The clamping rings are integrally formed by forging, with an internal pressing part and an external handle structure and pry hole. Connecting holes are provided at both ends of the clamping rings, which are used to clamp and fix the joint with a screw and an anti-loosening nut. The anti-loosening nut cover covers the tail of the screw for rust prevention and enhanced anti-loosening performance. The structure has high strength, is easy to install, and is suitable for grooved pipe connections in high-pressure, high-frequency disassembly and assembly, and complex environments.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection technology, and more specifically, to a forged anti-loosening pipe clamp structure for high-pressure grooved pipe joints. Background Technology

[0002] Grooved connections are a widely used rapid connection method in medium and high-pressure pipeline systems. They involve machining annular grooves at both ends of the pipe and using external retaining rings and bolt-nut assemblies to achieve a quick, detachable, and sealed connection. Compared to flange welding connections, grooved connections offer higher installation efficiency, easier construction, and more flexible assembly and disassembly, making them suitable for various complex engineering environments such as fire-fighting water supply, chemical processes, mine drainage, and municipal pipe networks.

[0003] Currently, most grooved pipe clamps used in engineering projects are cast products, which have low manufacturing costs, mature processing technology, and are suitable for mass production. However, the casting process inevitably introduces defects such as shrinkage porosity, air holes, sand inclusions, and cold shuts, making the products prone to breakage or structural damage under pressure or impact. Meanwhile, during long-term operation, the tail end of the connecting screw is often exposed, leading to moisture, dust accumulation, and corrosion, causing the nut threads to become stuck or loose, affecting pipe sealing and connection reliability. Furthermore, some grooved pipe clamp designs lack lifting structures and disassembly aids, resulting in low installation and maintenance efficiency, especially inconvenient when used at heights, in confined spaces, or when frequently changing locations.

[0004] Therefore, given the increasing demands of high-pressure, heavy-load, and high-frequency vibration operating conditions, there is an urgent need to provide a grooved pipe clamp connection structure with high structural strength, strong resistance to deformation, and functions such as anti-loosening and convenient operation, so as to effectively improve the safety, stability and maintenance efficiency of the overall system. Utility Model Content

[0005] To address the problems of existing technologies, this utility model provides a forged anti-loosening pipe clamp structure for high-pressure grooved pipe joints. The technical solution is as follows:

[0006] On the one hand, a forged anti-loosening pipe clamp structure for high-pressure grooved pipe joints is provided, including:

[0007] A symmetrically arranged arc-shaped retaining ring component is integrally formed from metal material through a forging process, forming a clamping structure that engages with the outer side of the grooved pipe end. The inner side of the arc-shaped retaining ring component is provided with a pressing part, which is used to cooperate with the annular groove on the outer wall of the pipe to achieve sealing and pressing.

[0008] The arc-shaped retaining ring component has connecting holes at both ends, and a screw rod passes through the connecting holes. Anti-loosening nuts are screwed to both ends of the screw rod. The anti-loosening nuts are cover-type structure nuts with screw rod protection function, which are used to cover the tail end of the screw rod and enhance the connection reliability.

[0009] The outer surface of the arc-shaped retaining ring component is provided with a force-applying surface, which is used to apply torque with the installation tool to complete the connection.

[0010] The arc-shaped retaining ring component has a pry hole, which is used to insert a lever tool for separation during disassembly.

[0011] The arc-shaped retaining ring component is also provided with a handle structure on the outside. The handle structure is fixedly connected to the top surface of the retaining ring component and is used for manual lifting during handling, alignment and disassembly.

[0012] Furthermore, the anti-loosening nut has a polygonal force-applying part on the outside and a square inner cavity structure inside. The inner cavity is connected to the screw and forms an oil lubrication space.

[0013] Furthermore, the crimping part is a continuous toothed structure provided along the inner side of the arc-shaped retaining ring component, and the tooth spacing matches the groove on the outer wall of the pipe.

[0014] Furthermore, the handle structure is a metal strip bent into a U-shape, which is fixedly connected to the top outer wall of the arc-shaped retaining ring component by welding or screws.

[0015] Furthermore, the arc-shaped retaining ring component consists of two independent components arranged symmetrically. After tightening, they wrap around the outside of the pipe, forming a closed connector that can be quickly assembled and disassembled.

[0016] The beneficial effects of the technical solution provided by this utility model embodiment are:

[0017] This utility model provides a forged anti-loosening pipe clamp structure for high-pressure grooved pipe joints. By integrally forming the main body of the clamp ring using metal forging process, it effectively avoids the process defects such as porosity, shrinkage porosity, and cracks commonly found in traditional casting structures, greatly improving the strength consistency and impact resistance of the clamp ring, making it more suitable for high-pressure, vibration, and highly corrosive working environments, and enhancing the overall safety and service life of the connection structure.

[0018] By setting connection holes at both ends of the retaining ring for threaded rods, and forming a symmetrical clamping structure with anti-loosening nuts that have thread protection function, not only is the connection secure and reliable, but a lubricant protection space is also formed inside the nut cover, which has the functions of rust prevention, anti-loosening and easy disassembly. This avoids thread jamming or thread failure caused by corrosion of the exposed thread end, and improves the stable operation of the pipeline system.

[0019] In addition, the retaining ring is equipped with a handle and a pry hole on the outside. The handle facilitates manual lifting and handling by construction personnel during transportation, handling, and high-altitude alignment and installation, improving construction efficiency and ergonomics. The pry hole provides a mechanically assisted disassembly fulcrum for later maintenance, solving the problem of difficult disassembly under high-strength connection conditions. The overall structural design is reasonable, facilitating rapid installation and frequent maintenance, and has good on-site practicality and engineering promotion value. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front view of a forged anti-loosening pipe clamp structure for a high-pressure grooved pipe joint according to an embodiment of the present invention.

[0022] Figure 2 This is a top view of a forged anti-loosening pipe clamp structure for a high-pressure grooved pipe joint according to an embodiment of the present invention.

[0023] Figure 3 This is a side view of a forged anti-loosening pipe clamp structure for a high-pressure grooved pipe joint according to an embodiment of the present invention.

[0024] Figure 4 for Figure 3 AA sectional view. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0026] like Figures 1 to 4 As shown, a forged anti-loosening pipe clamp structure for high-pressure grooved pipe joints includes a symmetrically arranged arc-shaped clamping ring component 1, which is used to achieve rapid connection and high-strength clamping of the grooved pipe 2.

[0027] The arc-shaped retaining ring component 1 is an integral metal structure formed by forging, preferably made of medium carbon steel or stainless steel, and undergoes heat treatment after forging to improve its mechanical properties. Compared with traditional cast retaining rings, this structure has no casting defects, uniform strength, and is suitable for high-pressure and high-vibration operating environments, significantly improving structural reliability and service life.

[0028] Two arc-shaped retaining rings are used to clamp onto the outer wall of the pipe with standard grooves at both ends. The inner side of the retaining ring is provided with a crimping part, which is a continuously distributed sawtooth structure. The crimping part cooperates with the grooved ring of the pipe 2 and applies a clamping force radially during the tightening of the screw to achieve reliable sealing and positioning.

[0029] The arc-shaped retaining ring component has connecting holes at both ends for threading connecting screws. In this embodiment, anti-loosening nuts 3 are installed at both ends of the connecting screw, that is, anti-loosening nuts with screw protection function are used. The nuts have an extended threaded engagement section and a cover-type structure. The inner cavity of the cover section is a square structure, which can cover the tail of the screw after tightening to prevent it from rusting, deforming or loosening due to vibration. The inner cavity can be pre-coated with grease for easy disassembly and maintenance later.

[0030] The outer surface of the arc-shaped retaining ring component 1 is provided with a force-applying surface, such as a hexagon or a raised surface, which facilitates the application of torque using tools such as open-end wrenches and pipe wrenches to complete the bolt connection.

[0031] To enhance the convenience of on-site use, the upper part of the arc-shaped retaining ring component 1 is provided with a handle structure 4, which is a bent metal plate fixed to the top surface of the retaining ring by welding. It is used for manual lifting, handling and alignment installation, reducing the operating burden of the installers.

[0032] In addition, the arc-shaped retaining ring is provided with a pry hole 5 on the side near the connecting nut. The pry hole 5 is a rectangular hole or a round hole, which can be inserted into a flat pry bar or screwdriver during disassembly to assist in separating the retaining ring and avoid disassembly difficulties caused by the connection being too tight in the fastened state.

[0033] The above structure adopts a combination of double retaining rings and screws with anti-loosening nuts arranged symmetrically on both sides in the overall design. It is easy to install and reliable in connection. It is suitable for application scenarios with high requirements for sealing, safety and maintainability, such as fire pipelines, chemical fluid transportation systems and high-pressure industrial water supply and drainage networks.

[0034] This utility model integrates multiple functions such as clamping, sealing, anti-loosening, protection, and disassembly assistance through its structure, avoiding problems such as body breakage, thread failure, and inconvenience in on-site construction that exist in traditional grooved connection devices, and has good engineering promotion value.

[0035] Application Examples

[0036] In the high-pressure water supply system of a petrochemical plant, multiple large-diameter steel grooved pipes (DN150 and above) need to be laid to supply water to process equipment such as distillation towers and heat exchangers. Due to the high operating pressure and large diurnal temperature variations in such systems, the pipe bodies and connection points are frequently subjected to thermal expansion and contraction, periodic vibrations, and external mechanical impacts. Traditional grooved pipe clamps are mostly cast structures, and have experienced numerous breakage accidents due to casting defects. Furthermore, during long-term operation, the connecting nuts are prone to corrosion, thread jamming, or loosening, seriously affecting the system's sealing and operational safety.

[0037] To improve the connection reliability of the system, the project team selected the forged anti-loosening pipe clamp structure for high-pressure grooved pipe joints provided by this utility model. The clamp body of this structure is formed by die forging and strengthened by heat treatment, giving it higher tensile strength, impact resistance, and fatigue resistance, successfully replacing the original casting. At the installation site, a double clamp structure is used to tighten it with screws. The toothed crimping part on the inner side of the clamp fits tightly with the pipe groove, forming a strong circumferential clamping force to ensure a leak-proof seal under high pressure.

[0038] The fastening screw ends are secured with anti-loosening sheath nuts, which, while covering the screw ends, are injected with anti-rust grease to effectively prevent moisture corrosion of the tail threads, thus avoiding maintenance difficulties later. The handle structure on the outside of the retaining ring provides additional support points for installers, facilitating operation during hoisting and manual adjustment. The pry hole design also provides an efficient disassembly method for later maintenance, avoiding secondary damage caused by overtightening.

[0039] After operational evaluation, the structure demonstrated excellent sealing and connection stability in chemical plants, with no downtime incidents caused by connection failures, fully verifying its applicability and reliability under high pressure, high corrosion, and high maintenance requirements.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A forged anti-loosening pipe clamp structure for high-pressure grooved pipe joints, characterized in that, include: A symmetrically arranged arc-shaped retaining ring component is integrally formed from metal material through a forging process, forming a clamping structure that engages with the outer side of the grooved pipe end. The inner side of the arc-shaped retaining ring component is provided with a pressing part, which is used to cooperate with the annular groove on the outer wall of the pipe to achieve sealing and pressing. The arc-shaped retaining ring component has connecting holes at both ends, and a screw rod passes through the connecting holes. Anti-loosening nuts are screwed to both ends of the screw rod. The anti-loosening nuts are cover-type structure nuts with screw rod protection function, which are used to cover the tail end of the screw rod and enhance the connection reliability. The outer surface of the arc-shaped retaining ring component is provided with a force-applying surface, which is used to apply torque with the installation tool to complete the connection. The arc-shaped retaining ring component has a pry hole, which is used to insert a lever tool for separation during disassembly. The arc-shaped retaining ring component is also provided with a handle structure on the outside. The handle structure is fixedly connected to the top surface of the retaining ring component and is used for manual lifting during handling, alignment and disassembly.

2. The forged anti-loosening pipe clamp structure for high-pressure grooved pipe joints according to claim 1, characterized in that, The anti-loosening nut has a polygonal force-applying part on the outside and a square inner cavity structure inside. The inner cavity is connected to the screw and forms an oil lubrication space.

3. The forged anti-loosening pipe clamp structure for high-pressure grooved pipe joints according to claim 1, characterized in that, The crimping part is a continuous toothed structure provided along the inner side of the arc-shaped retaining ring component, and the tooth spacing matches the groove on the outer wall of the pipe.

4. The forged anti-loosening pipe clamp structure for high-pressure grooved pipe joints according to claim 1, characterized in that, The handle structure is a metal strip bent into a U-shape, which is fixed to the top outer wall of the arc-shaped retaining ring component by welding or screws.

5. The forged anti-loosening pipe clamp structure for high-pressure grooved pipe joints according to claim 1, characterized in that, The arc-shaped retaining ring consists of two independent components arranged symmetrically. When tightened, they wrap around the outside of the pipe, forming a closed connector that can be quickly assembled and disassembled.

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