Connecting structure of stainless steel pipe

Abstract

The utility model provides a stainless steel pipe connecting structure, and relates to the technical field of stainless steel pipe connection, the stainless steel pipe connecting structure comprises two pipe bodies and a connecting piece used for connecting the two pipe bodies; the connecting piece comprises a supporting pipe arranged between the two pipe bodies, fixing rings are installed at the two ends of the supporting pipe, annular grooves are formed in the sides, close to each other, of the two fixing rings, and a plurality of sets of positioning pieces used for fixing the pipe bodies are arranged in the annular grooves. According to the technical scheme, a pressing ring in threaded connection with an annular groove is operated to move inwards, a touch plate can be extruded to drive a limiting plate and a positioning plate to move inwards, the positioning plate is embedded into a positioning groove, and therefore connection and fixation of a pipe body are achieved; and when the pressing ring is separated from the touch plate, the limiting plate drives the positioning plate and the touch plate to move outwards by means of resilience force of a spring. And the positioning plate is separated from the positioning groove, so that the pipe body is convenient to detach, the convenience of connecting and detaching the pipe body can be effectively improved, and meanwhile, the connecting stability of the pipe body can be effectively ensured.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel pipe connection technology, specifically a connection structure for stainless steel pipes. Background Technology

[0002] Stainless steel pipe is a hollow, long, round steel material, widely used in industrial pipelines for petroleum, chemical, medical, food, light industry, and machinery, as well as in mechanical structural components. Due to the limited length of stainless steel pipes, multiple pipes often need to be connected. Therefore, connecting structures are commonly used to assemble and connect the stainless steel pipes to meet practical application requirements.

[0003] As shown in the prior art of the prior art disclosed in CN211901919U, which describes a connection structure for stainless steel pipes with good connection reliability and sealing performance, this prior art changes the force relationship between the two connecting pipes by setting a positioning protrusion and a positioning recess. This allows the two pipes to ensure the reliability of the connection not only through pressure but also through clamping force, thereby greatly improving the reliability and sealing performance of the connection.

[0004] However, in the process of implementing the above technical solution, the following technical problems were found: The existing technology changes the force relationship between the two connecting pipes by setting a positioning protrusion and a positioning recess to improve the connection reliability and sealing performance. However, in actual application, the engagement of the positioning protrusion and the positioning recess may be deformed, leading to separation and loosening, which can easily affect the connection stability. Utility Model Content

[0005] To overcome the shortcomings of existing systems, this application provides a connection structure for a stainless steel pipe. By operating the pressure ring threadedly connected to the annular groove, the inward movement of the pressure ring can squeeze the contact plate, causing the limiting plate and positioning plate to move inward and embed the positioning plate into the positioning groove, thereby achieving the connection and fixation of the pipe body. When the pressure ring separates from the contact plate, the limiting plate, with the help of the spring's rebound force, causes the positioning plate and contact plate to move outward, and separates the positioning plate from the positioning groove, facilitating the disassembly of the pipe body. This effectively improves the convenience of connecting and disassembling the pipe body, while also effectively ensuring the connection stability of the pipe body.

[0006] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0007] A connection structure for stainless steel pipes includes two pipe bodies and a connector for connecting the two pipe bodies.

[0008] The connector includes a support tube disposed between two tubes. Both ends of the support tube are equipped with fixing rings. A ring groove is opened on the side of the two fixing rings that are close to each other. Multiple sets of positioning parts for fixing the tubes are provided inside the ring groove, and a pressure ring is threaded inside the ring groove.

[0009] Each positioning component includes an upper hole, a middle hole, and a lower hole that are connected inside the fixing ring. The middle hole is located between the upper hole and the lower hole, and the upper hole is located on the side of the lower hole away from the tube body. A limiting plate is provided inside the middle hole. A contact plate is installed on the side of the limiting plate away from the tube body, and the end of the contact plate away from the limiting plate extends into the upper hole and contacts the pressure ring. A positioning plate is installed on the side of the limiting plate close to the tube body, and the end of the positioning plate away from the limiting plate extends to the outside of the lower hole. A positioning groove is provided on the side of the tube body corresponding to the positioning plate, and the end of the positioning plate close to the tube body extends into the positioning groove.

[0010] Multiple springs are installed on the side of the limiting plate near the tube body. The end of the spring away from the limiting plate is fixed to the inner wall of the central hole. The positioning plate is located between the multiple springs.

[0011] In one possible implementation, a connecting ring is installed inside the support tube, with both ends of the connecting ring contacting the adjacent ends of the two tube bodies, and the inner diameter of the connecting ring is smaller than the inner diameter of the tube body.

[0012] In one possible implementation, sealing rings are installed at both ends of the connecting ring, with the end of the sealing ring away from the connecting ring extending into the inside of the pipe body, and the outer side of the sealing ring contacting the inner wall of the pipe body.

[0013] In one possible implementation, the contact plate has a trapezoidal cross-section, and the end of the contact plate near the pressure ring has an inclined cross-section.

[0014] In one possible implementation, an operating ring is mounted on the outer side of the end of the pressure ring away from the fixed ring, and the outer diameter of the operating ring is larger than the outer diameter of the fixed ring.

[0015] In one possible implementation, each of the two pressure rings has a movable hole on one side that is close to each other, and a movable ring is provided inside the movable hole. The cross-section of the movable hole and the cross-section of the movable ring are both T-shaped.

[0016] In one possible implementation, a telescopic tube is installed between the two movable rings, and the telescopic tube is sleeved outside the support tube.

[0017] In one possible implementation, the diameter of the limiting plate is equal to the diameter of the central hole, and the diameters of the upper hole and the lower hole are both smaller than the diameter of the central hole.

[0018] In summary, this utility model has at least one of the following beneficial technical effects:

[0019] In this solution, by operating the pressure ring connected to the annular groove and moving it inward, the contact plate can be squeezed, which in turn drives the limiting plate and the positioning plate to move inward, and the positioning plate is embedded in the positioning groove to achieve the connection and fixation of the pipe body. When the pressure ring separates from the contact plate, the limiting plate uses the spring's rebound force to drive the positioning plate and the contact plate to move outward, and the positioning plate separates from the positioning groove to facilitate the disassembly of the pipe body. This can effectively improve the convenience of connecting and disassembling the pipe body, and at the same time, it can effectively ensure the connection stability of the pipe body. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is an exploded view of the tube body of this utility model;

[0022] Figure 3 This is a sectional view of the fixing ring of this utility model;

[0023] Figure 4 For the present utility model Figure 3 Enlarged view of section A in the middle;

[0024] Figure 5 This is a cross-sectional view of the central hole of this utility model;

[0025] Figure 6 This is a top sectional view of the operating ring of this utility model.

[0026] Reference numerals in the attached drawings: 1. Pipe body; 2. Support pipe; 3. Fixing ring; 4. Ring groove; 5. Pressure ring; 6. Upper hole; 7. Middle hole; 8. Lower hole; 9. Limiting plate; 10. Contact plate; 11. Positioning plate; 12. Positioning groove; 13. Spring; 14. Connecting ring; 15. Sealing ring; 16. Operating ring; 17. Movable hole; 18. Movable ring; 19. Telescopic pipe. Detailed Implementation

[0027] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows:

[0028] This embodiment describes the specific structure of a stainless steel pipe connection structure, which can be referred to in detail below. Figure 1-6 As shown, it includes two pipe bodies 1 and a connector for connecting the two pipe bodies 1; the connector includes a support pipe 2 disposed between the two pipe bodies 1, with fixing rings 3 installed at both ends of the support pipe 2, and annular grooves 4 opened on the side of the two fixing rings 3 that are close to each other. Multiple sets of positioning components for fixing the pipe bodies 1 are provided inside the annular grooves 4, and pressure rings 5 ​​are threadedly connected inside the annular grooves 4; each set of positioning components includes an upper hole 6, a middle hole 7 and a lower hole 8 that are opened inside the fixing rings 3 and are connected to each other.

[0029] The middle hole 7 is located between the upper hole 6 and the lower hole 8, and the upper hole 6 is located on the side of the lower hole 8 away from the tube body 1. The middle hole 7 is provided with a limiting plate 9. A contact plate 10 is installed on the side of the limiting plate 9 away from the tube body 1. The cross section of the contact plate 10 is trapezoidal, and the cross section of the contact plate 10 near the pressure ring 5 is inclined. Because the contact plate 10 is inclined, the pressure ring 5 can squeeze the contact plate 10 and drive the positioning plate 11 on the limiting plate 9 to move inward and engage with the positioning groove 12. The end of the contact plate 10 away from the limiting plate 9 extends into the upper hole 6.

[0030] Meanwhile, the end of the contact plate 10 away from the limiting plate 9 is in contact with the pressure ring 5. A positioning plate 11 is installed on the side of the limiting plate 9 near the tube body 1. The end of the positioning plate 11 away from the limiting plate 9 extends to the outside of the lower hole 8. A positioning groove 12 is opened on the side of the tube body 1 corresponding to the positioning plate 11. The end of the positioning plate 11 near the tube body 1 extends into the positioning groove 12. A plurality of springs 13 are installed on the side of the limiting plate 9 near the tube body 1. The end of the spring 13 away from the limiting plate 9 is fixed to the inner wall of the middle hole 7. The positioning plate 11 is located between the plurality of springs 13.

[0031] Secondly, during use, the staff fixes the two pipe bodies 1 inside the two ends of the support pipe 2 respectively, and makes the connecting ring 14 and the sealing ring 15 contact the inside of the pipe body 1 to achieve the sealing and leakage prevention of the pipe body 1.

[0032] Subsequently, the staff rotated the operating ring 16 to drive the pressure ring 5, which is threadedly connected to the ring groove 4, to move inward. Because the cross section of the contact plate 10 is inclined, the pressure ring 5 can gradually squeeze and push the contact plate 10, the limiting plate 9 and the positioning plate 11 to move inward, and make the positioning plate 11 embedded in the positioning groove 12, thereby connecting the tube body 1 and the fixing ring 3 into one piece.

[0033] Furthermore, when disassembling the pipe body 1 for maintenance, the operator rotates the operating ring 16 to move the pressure ring 5, which is threadedly connected to the ring groove 4, outward, causing the pressure ring 5 to separate from the contact plate 10. This allows the limiting plate 9 to move the positioning plate 11 and the contact plate 10 outward with the help of the spring 13's rebound force, making it easier for the operator to disassemble the pipe body 1, which is not limited by the positioning plate 11. This improves the efficiency of connecting the pipe body 1, and the engagement of the multiple positioning plates 11 and the positioning groove 12 effectively enhances the connection stability of the pipe body 1.

[0034] Furthermore, to ensure the stability of the connection between the two pipe bodies 1 and to prevent leakage, such as Figure 2 and 3As shown, a connecting ring 14 is installed inside the support pipe 2. Both ends of the connecting ring 14 are in contact with the ends of the two pipe bodies 1 that are close to each other. The inner diameter of the connecting ring 14 is smaller than the inner diameter of the pipe body 1. The connecting ring 14 supports and limits the two pipe bodies 1, making it easier for the staff to install the pipe body 1 in the appropriate position. Both ends of the connecting ring 14 are equipped with sealing rings 15. The end of the sealing ring 15 away from the connecting ring 14 extends into the inside of the pipe body 1, and the outside of the sealing ring 15 contacts the inner wall of the pipe body 1. This allows the staff to achieve the effect of sealing and protecting the pipe body 1 by contacting the inner wall of the pipe body 1 with the sealing ring 15, thus preventing leakage.

[0035] In addition, to improve the convenience of operators in handling pressure ring 5, such as Figure 1 , 2 As shown in Figures 3 and 6, an operating ring 16 is installed on the outer side of the end of the pressure ring 5 away from the fixed ring 3, and the outer diameter of the operating ring 16 is larger than the outer diameter of the fixed ring 3. Through the connection between the operating ring 16 and the pressure ring 5, the operator can rotate the operating ring 16 to drive the pressure ring 5 to rotate. Since the outer diameter of the operating ring 16 is larger than the inner diameter of the fixed ring 3, the operating ring 16 protrudes more from the fixed ring 3, which makes it easier for the operator to operate the operating ring 16 more effectively.

[0036] In order to improve the protection of support tube 2, such as Figure 1 , 2 As shown in Figures 3 and 6, each of the two pressure rings 5 ​​has a movable hole 17 on one side that is close to each other. A movable ring 18 is provided inside the movable hole 17. The cross-section of the movable hole 17 and the cross-section of the movable ring 18 are both T-shaped. A telescopic tube 19 is installed between the two movable rings 18 and is sleeved on the outside of the support tube 2. Through the movable connection between the movable hole 17 and the movable ring 18, the rotation of the operating ring 16 will not cause the movable ring 18 to rotate. Thus, the telescopic tube 19 will not affect the use of the operating ring 16. The telescopic tube 19 can effectively shield and protect the outside of the support tube 2, avoid the corrosion of impurities and damage to the support tube 2, and ensure the performance of the support tube 2.

[0037] In some examples, to ensure the motion stability of the touch plate 10 and the positioning plate 11, such as Figure 4 and 5 As shown, the diameter of the limiting plate 9 is equal to the diameter of the middle hole 7, while the diameters of the upper hole 6 and the lower hole 8 are both smaller than the diameter of the middle hole 7. Because the diameter of the limiting plate 9 is equal to the diameter of the middle hole 7, and the diameters of the upper hole 6 and the lower hole 8 are both smaller than the diameter of the middle hole 7, the limiting plate 9 is larger than the contact plate 10 and the positioning plate 11. Thus, the limiting plate 9 can limit the contact plate 10 and the positioning plate 11, preventing the contact plate 10 and the positioning plate 11 from separating from the fixing ring 3 during displacement.

[0038] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A connection structure for stainless steel pipes, characterized in that: It includes two pipe bodies (1) and a connector for connecting the two pipe bodies (1); The connector includes a support pipe (2) disposed between two pipe bodies (1). Both ends of the support pipe (2) are equipped with fixing rings (3). Annular grooves (4) are opened on the side of the two fixing rings (3) that are close to each other. Multiple sets of positioning parts for fixing the pipe body (1) are provided inside the annular grooves (4), and pressure rings (5) are threaded inside the annular grooves (4). Each positioning component includes an upper hole (6), a middle hole (7), and a lower hole (8) that are connected inside the fixing ring (3). The middle hole (7) is located between the upper hole (6) and the lower hole (8), and the upper hole (6) is located on the side of the lower hole (8) away from the tube body (1). A limiting plate (9) is provided inside the middle hole (7). A contact plate (10) is installed on the side of the limiting plate (9) away from the tube body (1), and the end of the contact plate (10) away from the limiting plate (9) extends to the upper... Inside the hole (6), and the end of the contact plate (10) away from the limiting plate (9) is in contact with the pressure ring (5). The limiting plate (9) is equipped with a positioning plate (11) on the side near the tube body (1). The end of the positioning plate (11) away from the limiting plate (9) extends to the outside of the lower hole (8). A positioning groove (12) is opened on the side of the tube body (1) corresponding to the positioning plate (11). The end of the positioning plate (11) near the tube body (1) extends into the positioning groove (12). The limiting plate (9) is equipped with multiple springs (13) on the side near the tube body (1). The end of the spring (13) away from the limiting plate (9) is fixed to the inner wall of the central hole (7). The positioning plate (11) is located between the multiple springs (13).

2. The stainless steel pipe connection structure as described in claim 1, characterized in that: The support tube (2) is equipped with a connecting ring (14), and the two ends of the connecting ring (14) are respectively in contact with the close ends of the two tube bodies (1), and the inner diameter of the connecting ring (14) is smaller than the inner diameter of the tube body (1).

3. The stainless steel pipe connection structure as described in claim 2, characterized in that: Both ends of the connecting ring (14) are equipped with sealing rings (15). The end of the sealing ring (15) away from the connecting ring (14) extends into the inside of the pipe body (1), and the outside of the sealing ring (15) is in contact with the inner wall of the pipe body (1).

4. The stainless steel pipe connection structure as described in claim 1, characterized in that: The contact plate (10) has a trapezoidal cross section, and the end of the contact plate (10) near the pressure ring (5) has an inclined cross section.

5. The stainless steel pipe connection structure as described in claim 1, characterized in that: An operating ring (16) is installed on the outside of the end of the pressure ring (5) away from the fixed ring (3), and the outer diameter of the operating ring (16) is larger than the outer diameter of the fixed ring (3).

6. The stainless steel pipe connection structure as described in claim 1, characterized in that: Two pressure rings (5) are provided with movable holes (17) on their adjacent sides. Movable rings (18) are provided inside the movable holes (17). The cross-sections of the movable holes (17) and the movable rings (18) are both T-shaped.

7. The stainless steel pipe connection structure as described in claim 6, characterized in that: A telescopic tube (19) is installed between the two movable rings (18), and the telescopic tube (19) is sleeved on the outside of the support tube (2).

8. The stainless steel pipe connection structure as described in claim 1, characterized in that: The diameter of the limiting plate (9) is equal to the diameter of the middle hole (7), and the diameters of the upper hole (6) and the lower hole (8) are both smaller than the diameter of the middle hole (7).

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