Steel clamp joint for pipe connection

Abstract

The utility model discloses a steel material hoop joint for pipeline connection belongs to the technical field of pipeline connection, including 1. the joint body, is equipped with the pipe joint of joint body both ends, is equipped with the limit ring in the pipe joint, split type encircles hoop assembly, including two symmetrical hoop half rings of up and down, and the fixed connection of lower hoop half ring and joint body is equipped with the notched in the joint body of upper hoop half ring corresponding, two hoop half rings are connected through the adjusting mechanism, and the inside of upper hoop half ring is equipped with arc pressure tooth, and two hoop half rings outside are equipped with the guide inclined plane, the outer cap is set up in the outside of joint body, and the inner wall is equipped with the conical pressure surface, and the cooperation screw thread rotation of guide inclined plane realizes to hoop pressure tight, and the lock washer of preventing loosening is set up between the outer cap and hoop half ring, prevents the loosening of outer cap. Through the double positioning of end face limit and radial hug, the convergence of upper and lower hoop half rings eliminates the big gap, and the outer cap conical surface slip further strengthens the close degree of hoop connection.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline connection technology, specifically relating to steel clamp joints for pipeline connection. Background Technology

[0002] Pipeline connection technology is an indispensable and important component of modern industrial and civil infrastructure, widely used in many fields such as petrochemicals, power, metallurgy, municipal water supply, drainage, HVAC, shipbuilding, and food processing. With the continuous advancement of industrialization, pipeline systems are placing higher demands on connection reliability, installation efficiency, sealing performance, and ease of maintenance.

[0003] Traditional pipe connection methods include threaded connections, flange connections, and welding. However, these methods generally suffer from problems such as complex installation, poor sealing, weak vibration resistance, and non-reusability. Especially under high pressure, vibration, and frequent changes in thermal expansion and contraction, the risk of connection failure increases significantly. Therefore, developing a new type of pipe connection device that is simple in structure, quick to install, reliably sealed, and reusable has significant engineering application value and market demand.

[0004] In the prior art, CN114738571A discloses a clamp-type tension pipe joint, the structure of which includes an inner joint, an outer joint, an inner cap, an outer cap, and a clamp ring. Rotating the outer cap drives the clamp ring to press the pipe tightly onto the outer joint. While this structure achieves rapid pipe connection, it has the following shortcomings: ① The clamp ring is hidden inside the outer cap and is not visible, making it difficult to determine whether it is tightened during installation; ② Lacking anti-loosening structure, it is prone to loosening under vibration or thermal expansion and contraction; ③ The clamping force is not adjustable, resulting in poor adaptability. Summary of the Invention

[0005] To address the aforementioned problems, this utility model discloses a steel clamp joint for pipe connections. It features a simple structure and dual positioning through end face limiting and radial clamping, making installation intuitive and quick. The upper and lower clamps semi-circularly close to eliminate large gaps and ensure reliable sealing. The sliding and advancing of the outer cap cone surface further enhances the tightness of the clamp connection.

[0006] To achieve the above objectives, the specific technical solution of this application is as follows: A steel clamp joint for pipe connection includes a joint body, with pipe interfaces at both ends of the joint body, and a limiting ring inside the pipe interface, with a sealing ring on the surface of the limiting ring; The split-type surround clamp assembly includes two symmetrical clamp half-rings, the lower clamp half-ring is fixedly connected to the connector body, and a groove is provided on the connector body corresponding to the upper clamp half-ring. The groove is located in the middle of the limiting ring and the pipe interface. The two clamp half-rings are connected by an adjustment mechanism. The inner side of the upper clamp half-ring is provided with arc-shaped clamping teeth, and the outer side of the two clamp half-rings is provided with guide slopes. An external cap is fitted onto the outside of the connector body, and its inner wall has a tapered pressing surface. It works with the guide slope to rotate the thread to press the clamp. An anti-loosening locking washer is placed between the external cap and the clamp half-ring to prevent the external cap from loosening. A two-way threaded adjustment mechanism is used to connect two clamp half-rings and to drive the clamp half-rings to press against the pipe.

[0007] Based on the above technical features, preferably, the adjustment mechanism includes a bidirectional screw and two nut sliders, the two nut sliders are respectively connected to two clamp half rings, and the two nut sliders move synchronously towards or in opposite directions when the bidirectional screw is rotated.

[0008] Based on the above technical features, preferably, the outer cap is provided with a transparent window, which is made of high-strength transparent plastic, allowing the clamping state to be observed from the outside.

[0009] Based on the above technical features, preferably, the length of the groove is 1 / 3 of the circumference of the connector body, and the width is equal to the width of the clamp half-ring.

[0010] Based on the above technical features, the inner side of the clamp semi-ring is provided with elastic sealing teeth. The thickness of the elastic sealing teeth is greater than the wall thickness of the joint body, and the surface is covered with a rubber damping layer to enhance sealing and shock resistance.

[0011] Based on the above technical features, preferably, the pipe interface edges at both ends of the connector body are provided with chamfered guide sections to facilitate pipe insertion and alignment.

[0012] Compared with the prior art, the beneficial effects of this application are as follows: This application uses dual positioning of end face limiting and radial clamping, which automatically centers the pipe upon insertion, making installation intuitive and quick, and avoiding misinsertion and eccentricity; the upper and lower clamps semi-circularly close to eliminate large gaps and ensure reliable sealing; The external cap cone surface slides and advances to further enhance the tightness of the clamp connection, strengthening the connection from a radial 360-degree angle. The transparent window allows direct viewing of the compression state, enabling "visible" confirmation of the seal. The elastic sealing teeth on the inner side of the clamp semi-ring are tightly attached to the outer wall of the pipe and the joint body to form a stable connection, taking into account both sealing performance and vibration reduction. The lower clamp half-ring is fixed, while the upper clamp half-ring is movable. Disassembly and assembly only require loosening the external cap and the double-ended screw, and the pipe can be pulled out. All parts are reusable, reducing replacement costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the steel clamp joint for pipe connection according to this utility model; Figure 2 This is a top view of the connector body in this utility model. Figure 3 This is a side view of the upper clamp semi-ring structure in this utility model; Figure 4 This is a schematic diagram of the connection structure between the partially split-type surround clamp assembly and the outer cap in this utility model; List of identifiers in attached diagrams: 1. Connector body; 101. Groove; 2. Pipe interface; 3. Limiting ring; 4. Sealing ring; 5. Upper clamp half ring; 501. Elastic sealing tooth; 6. Lower clamp half ring; 7. Guide slope; 8. Bidirectional screw; 9. Nut slider; 10. External cap; 1001. Transparent window; 1002. Conical pressing surface; 11. Anti-loosening locking washer. Detailed Implementation

[0014] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0015] It should be noted that the terms "upper," "lower," "left," "right," "front," and "rear" used in the following description refer to the directions shown in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. Furthermore, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] like Figure 1 As shown, the steel clamp joint for pipe connection includes a joint body 1, with pipe interfaces 2 at both ends of the joint body 1. A limiting ring 3 is provided inside the pipe interface, and a sealing ring 4 is provided on the surface of the limiting ring 3 to axially position and seal the pipe.

[0017] The assembly includes a split-type surround clamp component, consisting of two symmetrical clamp half-rings, upper and lower. The lower clamp half-ring 6 is fixedly connected to the connector body 1. The connector body 1 corresponding to the upper clamp half-ring 5 has a groove 101, which is located in the middle of the limiting ring 3 and the pipe interface 2. The two clamp half-rings are connected by an adjustment mechanism. The inner side of the upper clamp half-ring has an arc-shaped clamping tooth, and the outer side of the two clamp half-rings has a guide slope 7. Preferably, the opposite surfaces of the upper and lower symmetrical clamp half-rings are provided with elastic sealing gaskets.

[0018] It includes an outer cap 10, which is fitted onto the outside of the connector body and has a tapered pressing surface 1002 on its inner wall. It can be screwed together with the guide slope to achieve clamping of the clamp. The anti-loosening locking washer 11 is set between the outer cap and the clamp half ring to prevent the outer cap from loosening. A bidirectional threaded adjustment mechanism is used to connect two clamp half-rings and to synchronously drive the clamp half-rings to move in the center.

[0019] The adjustment mechanism includes a bidirectional screw 8 and two nut sliders 9. The two nut sliders 9 are respectively connected to two clamp half rings. When the bidirectional screw 8 is rotated, the two nut sliders move synchronously towards or in opposite directions.

[0020] The outer cap 10 is provided with a transparent window, which is made of high-strength transparent plastic, allowing the clamping state to be observed from the outside, or the entire outer cap 10 is made of high-strength transparent PVC material.

[0021] Preferably, the length of the slot is 1 / 3 of the circumference of the connector body, and the width is equal to the width of the clamp half-ring.

[0022] The inner side of the clamp semi-ring is provided with elastic sealing teeth 501. The thickness of the elastic sealing teeth is greater than the wall thickness of the joint body, and the surface is covered with a rubber damping layer to enhance sealing and shock resistance.

[0023] Preferably, the pipe interface edges at both ends of the connector body are provided with chamfered guide sections to facilitate pipe insertion and alignment.

[0024] Working principle: The pipe is inserted along the chamfered guide section until the end face touches the limiting ring, thus completing the axial positioning.

[0025] Rotating the bidirectional screw 8 causes the upper and lower nut sliders to initially close the two clamp half-rings, eliminating large gaps; Rotate the outer cap 10, and the conical pressing surface slides along the guide slope, pushing the upper clamp half ring 22 through the groove 13 and radially pressing it against the pipe; the elastic sealing tooth 24 is embedded in the outer wall of the pipe to form an axial elastic seal, eliminating small gaps, and the fit can be observed through the transparent window.

[0026] Rotate the outer cap in the opposite direction to relieve the pressure on the conical surface, then rotate the double-ended screw in the opposite direction again. The two halves of the ring open synchronously, and the pipe can be pulled out freely. All parts are intact and can be reused.

[0027] It should be noted that the accompanying drawings merely illustrate the technical concept of the present invention and should not be used to limit the scope of protection of the present invention. For those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and all such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A steel clamp joint for pipe connection, characterized in that: It includes a connector body, with pipe interfaces at both ends of the connector body, a limiting ring inside the pipe interface, and a sealing ring on the surface of the limiting ring; The split-type surround clamp assembly includes two symmetrical clamp half-rings, the lower clamp half-ring is fixedly connected to the connector body, and a groove is provided on the connector body corresponding to the upper clamp half-ring. The groove is located in the middle of the limiting ring and the pipe interface. The two clamp half-rings are connected by an adjustment mechanism. The inner side of the upper clamp half-ring is provided with arc-shaped clamping teeth, and the outer side of the two clamp half-rings is provided with guide slopes. An external cap is fitted onto the outside of the connector body, and its inner wall has a tapered pressing surface. It works with the guide slope to rotate the thread to press the clamp. An anti-loosening locking washer is placed between the external cap and the clamp half-ring to prevent the external cap from loosening. A two-way threaded adjustment mechanism is used to connect two clamp half-rings.

2. The steel clamp joint for pipe connection according to claim 1, characterized in that: The adjustment mechanism includes a bidirectional screw and two nut sliders. The two nut sliders are respectively connected to two clamp half-rings. When the bidirectional screw is rotated, the two nut sliders move synchronously towards or in opposite directions.

3. The steel clamp joint for pipe connection according to claim 1, characterized in that: The outer cap is provided with a transparent window, which is made of high-strength transparent plastic.

4. The steel clamp joint for pipe connection according to claim 1, characterized in that: The length of the slot is 1 / 3 of the circumference of the connector body, and the width is equal to the width of the clamp half-ring.

5. The steel clamp joint for pipe connection according to claim 1, characterized in that: The inner side of the clamp semi-ring is provided with elastic sealing teeth, the thickness of which is greater than the wall thickness of the joint body, and the surface is covered with a rubber damping layer.

6. The steel clamp joint for pipe connection according to claim 1, characterized in that: The pipe interface edges at both ends of the connector body are provided with chamfered guide sections to facilitate pipe insertion and alignment.

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