Grooved pipe fitting clamping ring

Abstract

A grooved pipe joint clamping ring comprises a ring body, the ring body comprises an outer end face, an outer arc groove, an outer circle, an outer circle bevel, an inner step hole, and an inner step end face; the outer end face of the ring body contacts the outer end groove wall of the annular groove at the end of the grooved pipe joint of the pipeline groove connected steel pipe, the outer end face of the ring body and the outer end of the outer circle transition through the outer arc groove, and the inner end of the outer circle is connected to the outer circle bevel; the inner hole of the ring body contacts the inner diameter of the annular groove at the end of the grooved pipe joint of the pipeline groove connected steel pipe, the inner end face of the ring body is provided with an inner step hole, the inner step end face contacts the inner end groove wall of the annular groove at the grooved pipe joint of the pipeline groove connected steel pipe, and the inner step hole contacts the outer diameter cylindrical surface of the grooved pipe joint at the end of the pipeline groove connected steel pipe. The present invention is convenient for forming a complete ring, and when forming an insertion joint with the groove connected steel pipe, the insertion and withdrawal are reliable, the connection is stable, it is convenient for loading and unloading, and it can withstand higher forces.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline connection of outdoor steel pipelines, and in particular relates to a groove pipe joint clamping ring for flexibly connecting groove-connected steel pipes. Background Art

[0002] In modern warfare, the main way to ensure wartime oil supply is through oil pipeline transportation. Ensuring that the oil pipeline reaches the designated location in a timely and accurate manner to ensure the smooth flow of oil during wartime is a basic task that must be done in military struggle preparation. For large quantities of pipelines that are frequently connected and disassembled to replace the transportation site, frequent connection and disassembly operations are performed between the pipeline and the connector. The distance of the oil pipeline is getting longer and longer, so more and more connectors are needed to connect it, and the frequency of maintenance and replacement increases. With the complexity of military struggle, the oil pipeline is required to adapt to both flat environments and outdoor mountainous and hilly environments, that is, it must adapt to low-pressure liquid transportation and high-pressure liquid transportation.

[0003] On the other hand, the span and bearing capacity of the oil pipeline required in the gully environment are relatively large. When the span of the oil pipeline is large, multiple steel pipes need to be connected together to form a pipeline across the gully. The pipeline naturally bends downward under the dual effects of its own weight and the gravity of the transported liquid. If the pipeline is to be able to transport oil normally under special geographical conditions with a large span, a connector that can withstand large bending capacity and a certain degree of tensile strength is required, which can change the current connection form of the pipeline groove connection steel pipe. The pipeline groove connection steel pipe consists of a pipe body and groove pipe joints at both ends of the pipe body, and the outer diameter of the groove pipe joint has an annular groove in the middle.

[0004] A clamping ring is installed at the annular groove to form a groove-connected steel pipe assembly, and the groove-connected steel pipe assembly is connected to the socket joint to form a pipeline. The existing clamping ring is composed of two semicircles, which are fastened with the help of steel wire or spring, which is inconvenient to install and open and disassemble; when the socket joint is inserted and pulled out with the steel pipe, the clamping ring is easy to loosen. In a low-pressure and flat laying environment, the socket joint that cooperates with the groove-connected steel pipe assembly works well. When the socket joint and the groove-connected steel pipe are used in a bent state and a high-pressure environment, leakage will occur at the socket joint. In severe cases, the groove pipe pre-installed joint and the groove-connected steel pipe of the pipeline will fall off, causing a safety accident. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a groove pipe joint clamping ring, which is convenient for forming a complete ring. When forming an insertion joint with a grooved steel pipe, the insertion and withdrawal are reliable, the connection is stable, it is easy to load and unload, and it can withstand higher forces.

[0006] The technical solution of the present invention is: comprising a ring body,

[0007] The ring body includes an outer end face, an outer arc-shaped groove, an outer circle, an outer circle bevel, an inner step hole, and an inner step end face; the outer end face of the ring body contacts the outer end groove wall of the annular groove at the groove pipe joint at the end of the pipeline groove connecting the steel pipe, the outer end face of the ring body and the outer end of the outer circle transition through the outer arc-shaped groove, and the inner end of the outer circle is connected to the outer circle bevel; the inner hole of the ring body contacts the inner diameter of the annular groove at the groove pipe joint at the end of the pipeline groove connecting the steel pipe, the inner end face of the ring body is provided with an inner step hole, the inner step end face contacts the inner end groove wall of the annular groove at the groove pipe joint at the pipeline groove connecting the steel pipe, and the inner step hole contacts the outer diameter cylindrical surface of the groove pipe joint at the end of the pipeline groove connecting the steel pipe. The ring body is installed in the annular groove of the groove pipe joint of the pipeline groove connection steel pipe to form a groove connection steel pipe assembly; during the socket connection process of the groove connection steel pipe assembly and the connector body assembly, when the steel locking ring is placed between the inner arc groove and the outer arc groove, the steel locking ring cooperates with the inner / outer arc groove to form a matching pair, and the steel locking ring, the inner arc groove, and the outer arc groove constitute an arc surface fine-tuning mechanism.

[0008] The ring body is formed by buckling a semicircular ring 1 and a semicircular ring 2, the semicircular ring 1 and the semicircular ring 2 are rotationally symmetrical about the center of the ring body, and the ends of the semicircular ring 1 and the semicircular ring 2 are provided with buckles that cooperate with each other.

[0009] The buckle head includes inner buckle head 1, outer buckle head 1, inner buckle head 2 and outer buckle head 2; the semicircular ring 1 has inner buckle head 1 at one end, the semicircular ring 1 has outer buckle head 1 at the other end, the semicircular ring 2 has outer buckle head 2 that snaps with the inner buckle head 1 at one end, and the semicircular ring 2 has inner buckle head 2 that snaps with the outer buckle head 1 at the other end; the inner buckle head 1 and the inner buckle head 2 are both composed of a concave inner and outer arc located at the root and a convex outer and inner arc located at the head; the outer buckle head 1 and the outer buckle head 2 are both composed of a concave outer and inner arc located at the root and a convex inner and outer arc located at the head;

[0010] When semicircular ring one and semicircular ring two are buckled together, the concave inner and outer arcs of the inner buckle head one of semicircular ring one mesh with the convex inner and outer arcs of the outer buckle head two of semicircular ring two, and the convex outer and inner arcs of the inner buckle head one of semicircular ring one mesh with the concave outer and inner arcs of the outer buckle head two of semicircular ring two.

[0011] The outer diameter of the buckling part of the ring body is open; the cross section of the ring body is a closed polygon, and both ends of the inner hole of the groove pipe joint clamping ring are chamfered.

[0012] The outer arc-shaped groove is subjected to the radial force F from the steel locking ring and is transmitted to the end of the pipeline groove connection steel pipe in three ways: transmitted to the inner diameter of the annular groove of the pipeline groove connection steel pipe through the inner hole, transmitted to the inner end groove wall of the annular groove through the inner step end face, and transmitted to the outer diameter cylindrical surface of the groove pipe joint of the pipeline groove connection steel pipe end connected to the inner end of the annular groove notch through the inner step hole.

[0013] The grooved pipe joint clamp in the present invention is formed by two half-circular rings buckled together, and the on-site installation and disassembly are simple. During the installation and disassembly of the grooved steel pipe assembly and the connector body assembly, the steel locking ring slides on the outer circle and outer circle inclined surface of the grooved pipe joint clamp without resistance. The grooved pipe joint clamp in the present invention is tightly fitted with the outer diameter of the end of the grooved pipe joint of the pipeline grooved steel pipe. The grooved steel pipe assembly formed by the grooved pipe joint clamp and the pipeline grooved steel pipe can withstand a large force, exert the maximum strength of the grooved pipe joint of the pipeline grooved steel pipe, and has a high pressure bearing capacity. The grooved pipe joint clamp is provided with an outer circle inclined surface, which, on the one hand, facilitates the installation and disassembly of the pipeline grooved steel pipe; on the other hand, the inner convex truncated cone supporting the sealing rubber ring in the working state can withstand higher pressure. The grooved pipe joint clamp in the present invention is installed and opened with the help of tools, and is not easy to loosen. The present invention designs an inner step hole, and the inner step hole contacts the outer diameter cylindrical surface of the end groove pipe joint of the pipeline groove connection steel pipe, thereby increasing the contact surface between the groove pipe joint clamp and the groove pipe joint, and when forming an insertion joint with the groove connection steel pipe, the insertion and withdrawal are reliable and stable. The connection between the socket joint of the present invention and the groove connection steel pipe of the pipeline is stable, not easy to fall off, and has high safety. After the socket joint of the present invention is connected to the groove connection steel pipe assembly, the socket joint can withstand the pressure and bending force from the pipeline through the groove pipe joint clamp, and can also withstand the thrust, which is convenient for connecting the pipeline groove connection steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a usage state diagram of the present invention;

[0015] Figure 2 It is a schematic diagram of a grooved steel pipe assembly of a pipeline grooved steel pipe and a grooved pipe joint clamp installed;

[0016] Figure 3 It is a structural schematic diagram of a grooved pipe joint clamping ring;

[0017] Figure 4 yes Figure 3 A magnified view of part I;

[0018] Figure 5 yes Figure 3 A magnified view of Part II;

[0019] Figure 6 It is a schematic diagram of the structure of the semicircular ring 1;

[0020] Figure 7 yes Figure 6 Side view of

[0021] Figure 8 yes Figure 7 A magnified image of the AI ​​department;

[0022] Fig. 9 yes Figure 7 A magnified view of part AII;

[0023] Fig.10 yes Figure 6 Magnified view of the X part;

[0024] Fig.11 It is a schematic diagram of the buckling process of the semicircular ring 1 401 and the semicircular ring 2 4021. DETAILED DESCRIPTION

[0025] Figure 1-11 In the figure, the safety joint for grooved steel pipe consists of a connector body 1, a grooved pipe joint clamping ring 3, a steel locking ring 2, and a sealing rubber ring 4. The connector body 1 and the grooved pipe joint clamping ring should be made of 35Cr or thick-walled pipes of equal strength. The steel locking ring should be made of 65Mn cold-drawn spring steel wire. The sealing rubber ring 4 should be made of nitrile oil-resistant rubber or synthetic oil-resistant rubber. The outer surface hardness of the connector body 1 shall not be less than HRC28, and the surface hardness of the internal R3 arc shall not be less than HRC32. The surface hardness of the grooved pipe joint clamping ring 3 shall not be less than HRC28, and the surface hardness of the steel locking ring 2 shall not be less than HRC32. The steel locking ring 2 is a circular ring with a notch, and its inner diameter is slightly smaller than the outer diameter of the grooved pipe joint connecting the end of the steel pipe in the free state.

[0026] The middle part of the inner wall of the connector body 1 is a shoulder 206. The inner cavity of the connector body 1 on both sides of the shoulder 206 is a mounting hole for installing the pipeline groove connecting steel pipe 5. The mounting hole includes a second step hole 205 located on the inner side and a first main step hole 204 located on the outer side. The outer end of the first main step hole 204 is chamfered to form an inner hole bevel 208. The inner end of the first main step hole 204 is connected to the second step hole 205 through a transition arc bevel 207. The aperture of the first main step hole 204 is larger than the aperture of the second step hole 205. The hole wall of the first main step hole 204 is provided with an inner arc groove 203, an outer end straight groove 201, and an inner end straight groove 202 from the outside to the inside. The inner arc groove 203 is connected to the outer side of the notch of the outer end straight groove 201. The connector body 1 has an outer round bevel 209. The sealing rubber ring 4 is installed in the inner end straight groove 202, and the steel locking ring 2 is installed in the outer end straight groove 201.

[0027] When the pipeline groove connection steel pipe 5 is connected to the connector body 1 of the present invention to form a pipeline for liquid transportation, the pipeline groove connection steel pipe is subjected to tension and liquid pressure. This force acts on the connector body 1 after passing through the outer arc groove 403 of the groove pipe joint clamp ring 3, the steel locking ring 2, and the inner arc groove 203 along the pipeline groove connection steel pipe. This force F acts on the outer end of the connector body 1 in a direction of about 45°. The outer arc groove 403 of the groove pipe joint clamp ring 3, the steel locking ring 2, and the inner arc groove 203 of the connector body form an arc surface fine-tuning mechanism, and the steel locking ring 2 cooperates with the inner / outer arc grooves to form a matching pair. The cross section of the steel locking ring is circular.

[0028] The ring body of the groove pipe joint clamping ring is formed by two identical semicircular rings 1 401 and 4021 interlocked to form a complete annular ring body, which is installed in the annular groove of the groove pipe joint at the end of the pipeline groove connection steel pipe 5, and forms a groove connection steel pipe assembly with the pipeline groove connection steel pipe for use, and the groove pipe joint form of the pipeline groove connection steel pipe 5 is changed into a socket form, that is, the pipeline groove connection steel pipe 5 is installed through the groove pipe joint clamping ring 3 to become a socket steel pipe joint.

[0029] Specific structure and engagement principle of groove pipe joint clamp ring 3:

[0030] The buckle heads at the ends of the two identical semicircular rings 1 401 and 2 4021 are buckled to form a convex-concave curved surface. Fig.11 and Figure 5 The semicircular ring 2 4021 rotates 180° and has the same structure as the semicircular ring 1 401. The outer diameter of the grooved pipe joint clamp 3 is provided with an opening, and the opening is in a V-shaped structure. When the grooved pipe joint clamp 3 on the pipeline groove connection steel pipe 5 needs to be removed, the grooved pipe joint clamp 3 is pried open from the opening with a flat head to separate the semicircular ring 1 401 and the semicircular ring 2 4021. Concave and concave (such as Figure 8 , Fig. 9 ) is composed of a concave inner and outer arc 409, a convex outer and inner arc 410, a concave outer and inner arc 411, and a convex inner and outer arc 412 in pairs. The concave inner and outer arc 409 and the convex inner and outer arc 412 cooperate and mesh with each other, and the convex outer and inner arc 410 and the concave outer and inner arc 411 cooperate and mesh with each other.

[0031] When the convex and concave curves just start to contact during the meshing process (such as Fig.11 ), the convex outer inner arc 410 is in contact with the convex inner and outer arcs 412, and the convex outer inner arc 410 and the convex inner and outer arcs 412 are engaged by the elastic force of the material through artificial inward force. If there is no outward force to engage, the annular groove pipe joint clamping ring 3 cannot be separated.

[0032] The cross-sectional shape of the groove pipe joint clamp is special-shaped, and is respectively composed of an outer end face 402, an outer arc-shaped groove 403, an outer circle 404, an outer circle inclined surface 405, an inner step hole 406, an inner step end face 407, and an inner hole 408. The characteristics of the outer arc-shaped groove 403 are as follows: 1. The steel locking ring 2, the inner arc-shaped groove 203, and the outer arc-shaped groove 403 constitute an arc surface fine-tuning mechanism. The steel locking ring 2 cooperates with the inner / outer arc-shaped grooves to form a matching pair. The outer arc-shaped groove 403 bears the radial force F from the steel locking ring 2. The force-bearing contact surface is an arc-shaped concave surface. Compared with the force-bearing contact surface of a plane, the outer arc-shaped groove 403 can withstand a larger force. Therefore, the present invention can be used in a state of a larger angle; 2. The outer arc-shaped groove 403 of the groove pipe joint clamp in the groove connection steel pipe assembly swings along the cross-section of the steel locking ring of the arc structure as a circular center, and the groove The outer arc groove 403 of the groove pipe joint clamp ring is automatically adjusted to the center of the circular cross section of the steel locking ring, which does not affect the bearing force of the outer arc groove 403. At the same time, the outer arc groove 403 bears the radial force F from the steel locking ring 2, and is transmitted along the force direction to the connection between the inner step end face 407 and the inner hole 408 to form an angle to bear the main part of the force, and the inner step hole 406 also bears a certain auxiliary force; Third, the outer arc groove 403 and the outer circle 404 adopt an arc transition. When the grooved steel pipe assembly is inserted into the socket of the connector body assembly, it is convenient for the steel locking ring 2 to slide from the outer circle 404 to the outer arc groove 403. When the grooved steel pipe assembly is removed from the socket of the connector body assembly, the front end inclined surface expands the inner hole of the steel locking ring outward when the detachable sleeve is axially displaced, relying on the elastic contraction force of the steel locking ring itself and sliding from the outer arc groove 403 to the outer circle 404.

[0033] The outer end face 402, the inner step end face 407, and the inner hole 408 cooperate with the annular groove at the end groove pipe joint of the pipeline groove connection steel pipe 5, and the inner step hole 406 contacts the outer diameter cylindrical surface of the end groove pipe joint of the pipeline groove connection steel pipe 5. The groove pipe joint clamping ring 3 and the pipeline groove connection steel pipe 5 are assembled to form a groove connection steel pipe assembly. The groove pipe joint clamping ring 3 can move and withstand force with the pipeline groove connection steel pipe 5. The outer arc-shaped groove 403 withstands the radial force F from the steel locking ring 2, and the radial force F is transmitted to the corresponding contact surface of the end annular groove of the pipeline groove connection steel pipe 5 through the angle formed at the connection between the inner step end face 407 and the inner hole 408; The inner step hole 406 also plays the role of bearing a certain auxiliary force to be transmitted to the outer diameter cylindrical surface of the end of the pipeline groove connection steel pipe 5, and assisting in bearing the angle formed by the inner step end face 407 and the inner hole 408 to prevent possible rotation force when the main force is borne. The rotation force will cause the groove pipe joint clamping ring 3 to separate from the annular groove at the groove pipe joint of the pipeline groove connection steel pipe 5; the outer end face 402 also mainly bears the angle formed at the connection between the inner step end face 407 and the inner hole 408 to prevent possible rotation force when the main force is borne; the inner hole 408 and the outer diameter of the bottom of the annular groove at the groove pipe joint at the end of the pipeline groove connection steel pipe are tightly embraced, and the buckles of the convex and concave curved buckling surfaces engage with each other.

[0034] An outer circle bevel 405 is arranged at the inner end of the outer circle 404, so that the inner end surface of the ring body gradually transitions from small to large. Its main function is to bear the radial expansion and contraction function of the steel locking ring. The outer circle bevel 405 can support the inner convex cone 301 of the sealing rubber ring 4. When the sealing rubber ring 4 is subjected to high pressure, the inner convex cone 301 plays a supporting and sealing role.

[0035] The force bearing and transmission path of the groove pipe joint clamp ring 3: the outer arc groove 403 bears the radial force F from the steel locking ring 2, and transmits it to the inner hole 408, the inner step end face 407, and the inner step hole 406 and the inner diameter and inner end of the annular groove of the corresponding pipeline groove connection steel pipe, and the outer diameter cylindrical surface of the groove pipe joint at the end of the pipeline groove connection steel pipe connected to the inner end of the annular groove notch. The transmission path is the matching contact surface between the groove pipe joint clamp ring 3 and the pipeline groove connection steel pipe 5 and the annular groove, specifically: the inner hole 408 corresponds to the inner diameter of the annular groove, the inner step end face 407 corresponds to the inner end groove wall of the annular groove, the inner end groove wall of the annular groove is close to the end face of the groove pipe joint, the inner step hole 406 corresponds to the outer diameter cylindrical surface of the groove pipe joint at the end of the pipeline groove connection steel pipe 5, and this outer diameter cylindrical surface is between the annular groove and the end face of the groove pipe joint.

Claims

1. A grooved pipe joint clamping ring, characterized in that: Including the ring body, The ring body comprises an outer end face (402), an outer arc-shaped groove (403), an outer circle (404), an outer circle inclined surface (405), an inner step hole (406), and an inner step end face (407); the outer end face (402) of the ring body contacts the outer end groove wall of the annular groove at the end of the groove pipe joint of the pipeline groove connecting steel pipe (5); the outer end face (402) of the ring body and the outer end of the outer circle (404) are transitioned through the outer arc-shaped groove (403); the outer circle (404) 04) The inner end is connected to the outer circular inclined surface (405); the inner hole (408) of the ring body contacts the inner diameter of the annular groove at the groove pipe joint at the end of the pipeline groove connection steel pipe (5), and the inner end surface of the ring body is provided with an inner step hole (406), the inner step end surface (407) contacts the inner end groove wall of the annular groove at the groove pipe joint of the pipeline groove connection steel pipe (5), and the inner step hole (406) contacts the outer diameter cylindrical surface of the groove pipe joint at the end of the pipeline groove connection steel pipe (5); The ring body is formed by half ring one (401) and half ring two (4021) being buckled and connected. Half ring one (401) and half ring two (4021) are rotationally symmetrical about the center of the ring body. The ends of half ring one (401) and half ring two (4021) are provided with buckles that fit together.

2. The grooved pipe joint clamping ring according to claim 1, characterized in that: The buckle head comprises an inner buckle head 1, an outer buckle head 1, an inner buckle head 2 and an outer buckle head 2; the inner buckle head 1 is provided at one end of the semicircular ring 1 (401), the outer buckle head 1 is provided at the other end of the semicircular ring 1 (401), the outer buckle head 2 is provided at one end of the semicircular ring 2 (4021) and the inner buckle head 2 is provided at the other end of the semicircular ring 2 (4021) and the outer buckle head 1 is provided; the inner buckle head 1 and the inner buckle head 2 are both connected by a concave inner and outer arc (409) at the root and a convex outer and inner arc (410) at the head; the outer buckle head 1 and the outer buckle head 2 are both connected by a concave outer and inner arc (411) at the root and a convex inner and outer arc (412) at the head; When the semicircular ring 1 (401) and the semicircular ring 2 (4021) are buckled together, the concave inner and outer arcs (409) of the inner buckle head 1 of the semicircular ring 1 (401) are meshed and buckled with the convex inner and outer arcs (412) of the outer buckle head 2 of the semicircular ring 2 (4021), and the convex outer and inner arcs (410) of the inner buckle head 1 of the semicircular ring 1 (401) are meshed and buckled with the concave outer and inner arcs (411) of the outer buckle head 2 of the semicircular ring 2 (4021).

3. The grooved pipe joint clamping ring according to claim 2, characterized in that: The outer diameter of the buckling part of the ring body is open; the cross section of the ring body is a closed polygon, and both ends of the inner hole (408) of the grooved pipe joint clamping ring (3) are chamfered.

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