Air compressor waste heat recovery pipeline connecting structure

Abstract

The utility model discloses an air compressor waste heat recovery pipeline connecting structure, and relates to the field of air compressor accessories. According to the technical scheme, the air compressor waste heat recovery pipeline connecting structure comprises a pipe body, the left end of the pipe body is slidably connected with a first internal thread connecting cap, the right end of the pipe body is slidably connected with a second internal thread connecting cap, and a connector assembly is installed at the right end of the pipe body and comprises a first external thread ring; the first external thread ring is in threaded connection with the second internal thread connecting cap, the right side of the first external thread ring is fixedly connected with a connecting block, a sheath assembly is arranged outside the pipe body, and an inner cavity of the sheath assembly is matched with the outer contour of the connecting block and the outer contour of the second internal thread connecting cap. According to the scheme, the external sheath assembly is arranged, rigid limiting is formed outside the second internal thread connecting cap and the connecting block of the connector assembly, twisting between the second internal thread connecting cap and the connecting block is reduced, damage of internal and external threads to sealing materials is reduced, sealing performance and stability between connectors are guaranteed, waste heat medium loss is reduced, and waste heat recovery efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of air compressor accessories, specifically to a connection structure for an air compressor waste heat recovery pipeline. Background Technology

[0002] An air compressor is a device used to compress gas. Air compressors are similar in structure to water pumps. Most air compressors are reciprocating piston type. Since air compressors generate a lot of heat during operation, waste heat recovery equipment is often used to utilize this waste heat. Waste heat recovery equipment refers to a new type of high-efficiency waste heat utilization equipment that heats cold water by absorbing the waste heat from the air compressor. There is no energy consumption. As a new type of high-efficiency waste heat utilization equipment, it is mainly used to solve the problems of hot water for employees' domestic and industrial use. During the use of air compressor waste heat recovery equipment, it needs to be connected to the water circuit through a connecting joint.

[0003] In existing technologies, the connection joints of waste heat recovery pipelines for air compressors are mostly threaded connections. Initial sealing is achieved by wrapping PTFE tape to fill the thread gaps. Sometimes, a rubber sealing ring is also used for soft sealing. However, air compressor pipelines are generally universal or corrugated pipes, which are flexible pipes. When the air compressor vibrates during operation, the threaded joints are prone to high-frequency twisting due to the tolerance gaps in the threaded connections. The PTFE tape is soft and has a very thin thickness. The internal and external threads constantly rub and shear the PTFE tape and the sealing ring, which can easily cause material aging and deformation, resulting in fluid leakage. This leads to a large amount of waste heat loss, reduces recovery efficiency, and poses safety hazards. As a result, the joints are prone to loosening or even breaking due to stress concentration, seriously affecting the normal operation of the waste heat recovery system. Summary of the Invention

[0004] This utility model addresses the problem of leakage easily occurring in air compressor pipeline joints under operating vibration by providing a connection structure for air compressor waste heat recovery pipelines.

[0005] To address the aforementioned problems, this utility model employs a technical solution: a connection structure for a waste heat recovery pipeline in an air compressor. The structure includes a pipe body, a first internally threaded connecting cap slidably connected to the left end of the pipe body, and a second internally threaded connecting cap slidably connected to the right end of the pipe body. A connector assembly is installed on the right end of the pipe body. The connector assembly includes a first externally threaded ring, which is threadedly connected to the second internally threaded connecting cap. A connecting block is fixedly connected to the right side of the first externally threaded ring, and a second externally threaded ring is fixedly connected to the right side of the connecting block. A sheath assembly is provided outside the pipe body, with the connecting block and the second internally threaded connecting cap located within the sheath assembly. The inner cavity of the sheath assembly is adapted to the outer contours of the connecting block and the second internally threaded connecting cap. This solution, based on traditional threaded connections, further incorporates an external sheath assembly. The second internally threaded connecting cap and the connecting block of the connector assembly are located inside the sheath assembly, forming a rigid limit outside the second internally threaded connecting cap and the connecting block of the connector assembly. This reduces the twisting between them, thereby reducing damage to the sealing material from the internal and external threads, ensuring the sealing and stability of the connector, reducing waste heat medium loss, and improving waste heat recovery efficiency.

[0006] As a preferred embodiment of the connection structure for a waste heat recovery pipeline of an air compressor, the sheath assembly includes a connecting plate. Two first limiting blocks are provided along the outer edge of the connecting plate. A limiting rod is slidably mounted on each of the first limiting blocks, and a spring is sleeved on the outside of the limiting rod. A second limiting block is slidably mounted on the side of the limiting rod away from the first limiting block. One end of the spring is fixedly connected to the first limiting block, and the other end is fixedly connected to the second limiting block. Limiting plates are provided at both ends of the limiting rod. The first limiting block, the second limiting block, and the spring are all located between the two limiting plates. A connecting cylinder is fixedly installed between the two second limiting blocks. The second internal threaded connecting cap and the connecting block are both located inside the connecting cylinder. The elastic buffering effect of the spring can offset the impact force caused by vibration, preventing the threads from loosening due to rigid collision at the connection point. The cooperation between the limiting rod and the limiting plates ensures that the connecting cylinder is always within its effective working range, further strengthening the circumferential limiting of the second internal threaded connecting cap and the connecting block, reducing the torsional amplitude, and simultaneously improving the vibration resistance of the connection structure and extending the service life of the components.

[0007] As a preferred solution for the connection structure of waste heat recovery pipelines in air compressors, the connecting cylinder is equipped with an insulation component. The insulation component can effectively block heat exchange between the connection part and the outside environment, reduce the temperature loss of the waste heat medium at this part, ensure the temperature stability of the medium during the waste heat recovery process, and thus further improve the overall waste heat recovery efficiency.

[0008] As a preferred embodiment of the waste heat recovery pipeline connection structure for air compressors, the insulation component includes an insulation ring, which is sleeved on the outer circumference of the connecting cylinder. The insulation ring has a simple structure, is easy to install, and can directly and tightly contact the outer circumferential surface of the connecting cylinder to form a continuous insulation layer, effectively reducing heat loss to the outside through the connecting cylinder. Simultaneously, the detachable design of the insulation ring facilitates later maintenance or replacement, reducing the maintenance cost of the insulation component.

[0009] As a preferred embodiment of the connection structure for a waste heat recovery pipeline of an air compressor, a limiting groove is provided axially through the connecting cylinder. The outer circumferential surface of the connecting block slides with the inner circumferential surface of the limiting groove, and the connecting block is slidably installed inside the limiting groove. The outer circumferential surface of the second internal threaded connecting cap slides with the inner circumferential surface of the limiting groove, and the second internal threaded connecting cap is slidably installed inside the limiting groove. The limiting groove, through its sliding engagement with the connecting block and the second internal threaded connecting cap, forms precise axial guidance and radial limiting, preventing thread wear or sealing failure due to misalignment during threaded connection. Simultaneously, it further constrains the circumferential torsion of both components, enhancing the stability of the connection, reducing the consumption of sealing material, and ensuring sealing performance.

[0010] As a preferred implementation of the connection structure for waste heat recovery pipelines in air compressors, a limiting ring is provided at the right end of the pipe body. A retaining ring is opened inside the first external threaded ring, and the limiting ring is located inside the first external threaded ring, with the limiting ring and the retaining ring abutting against each other. The abutting relationship between the limiting ring and the retaining ring forms an axial positioning between the pipe body and the first external threaded ring, preventing the pipe body from axially shifting due to vibration or medium pressure during use, and avoiding loosening caused by additional axial force on the threaded connection part; at the same time, it ensures the relative position stability of the pipe body and the joint assembly, improving the connection reliability of the overall structure.

[0011] As a preferred implementation of the waste heat recovery pipeline connection structure for air compressors, a retaining ring is fixedly connected to the right end of the outer side of the pipe body, and the retaining ring is located inside the first external threaded ring. The retaining ring and the limiting ring together form a double axial limiting structure, which not only prevents the pipe body from being excessively inserted into the first external threaded ring, but also avoids the connection from being too tight due to the first external threaded ring being too close to the pipe body. This protects the threaded structure and the end of the pipe body, reduces damage to components caused by excessive compression, and extends the service life of the pipeline connection structure.

[0012] As a preferred embodiment of the waste heat recovery pipeline connection structure for an air compressor, the pipe body is L-shaped, comprising a long section and a short section. The first internally threaded connector is located at the end of the short section, and the second internally threaded connector is located at the end of the long section. The L-shaped pipe body can adapt to complex installation spaces, reducing the number of additional connectors required due to pipeline turning and lowering the risk of leakage. At the same time, it shortens the overall path length of the pipeline, reduces heat loss of the waste heat medium during transmission, and improves the flexibility of system layout and the overall efficiency of waste heat recovery.

[0013] As can be seen from the above technical solutions, the beneficial effects of this utility model are as follows: This solution adds a sheath assembly to the traditional threaded connection, effectively reducing the twisting of the connecting parts by means of internal rigid limiting, reducing damage to the sealing material, ensuring the sealing and stability of the joint, and reducing the loss of residual heat medium; the spring and limiting rod in the sheath assembly further enhance the vibration resistance, prevent the threads from loosening, and extend the service life of the components. The heat insulation component on the connecting cylinder forms a high-efficiency heat insulation layer, reducing heat loss, ensuring the stability of the medium temperature, improving the efficiency of residual heat recovery, and the heat insulation ring is easy to install and maintain. The limiting groove in the connecting cylinder achieves precise guidance and limiting, preventing thread misalignment and wear, and enhancing connection stability; the limiting ring, retaining ring, and snap ring on the pipe body constitute a double axial limiting, preventing excessive movement or compression of components, protecting the thread structure, and improving connection reliability. The L-shaped pipe body is suitable for complex spaces, reduces additional connecting parts, reduces the risk of leakage, shortens the pipeline path to reduce heat loss, and improves the flexibility of system layout. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the description 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.

[0015] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0016] Figure 2 This is an exploded view of the tube body in a specific embodiment of this utility model.

[0017] Figure 3 This is a schematic diagram of the connector assembly in a specific embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the sheath assembly structure in a specific embodiment of this utility model.

[0019] In the diagram: 1. Pipe body; 101. First internal threaded connecting cap; 102. Second internal threaded connecting cap; 103. Retaining ring; 104. Limiting ring; 105. First external threaded ring; 106. Snap ring; 107. Connecting block; 108. Second external threaded ring; 2. Connecting plate; 201. First limiting block; 202. Limiting rod; 203. Spring; 204. Limiting piece; 205. Second limiting block; 206. Connecting cylinder; 207. Limiting groove; 208. Insulation ring. Detailed Implementation

[0020] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0021] like Figure 1-3 As shown, a waste heat recovery pipeline connection structure for an air compressor includes a pipe body 1, with the left end of the pipe body 1 (as shown) Figure 1 , Figure 2 (Based on the direction in the middle, the same below) A first internal threaded connecting cap 101 is slidably connected, and a second internal threaded connecting cap 102 is slidably connected to the right end of the pipe body 1. Specifically, the pipe body 1 is L-shaped, including a long section and a short section. The short section is located to the right of the long section. The first internal threaded connecting cap 101 is located at the end of the short section, and the second internal threaded connecting cap 102 is located at the end of the long section. A connector assembly is installed at the right end of the pipe body 1. The connector assembly includes a first external threaded ring 105, which is threadedly connected to the second internal threaded connecting cap 102. A connecting block 107 is fixedly connected to the right side of the first external threaded ring 105, and a second external threaded ring 108 is fixedly connected to the right side of the connecting block 107. A sheath assembly is provided on the outside of the pipe body 1. The connecting block 107 and the second internal threaded connecting cap 102 are located in the sheath assembly. The inner cavity of the sheath assembly is adapted to the outer contour of the connecting block 107 and the second internal threaded connecting cap 102.

[0022] like Figure 4As shown, the sheath assembly includes a connecting plate 2. Two first limiting blocks 201 are disposed along the outer edge of the connecting plate 2. A limiting rod 202 is slidably mounted on each first limiting block 201. A spring 203 is sleeved on the outside of the limiting rod 202. A second limiting block 205 is slidably disposed on the side of the limiting rod 202 away from the first limiting block 201. One end of the spring 203 is fixedly connected to the first limiting block 201, and the other end of the spring 203 is fixedly connected to the second limiting block 205. Limiting pieces 204 are respectively disposed at both ends of the limiting rod 202. The first limiting block 201, the second limiting block 205, and the spring 203 are all located between the two limiting pieces 204. The two second limiting blocks 205 are fixedly mounted together. The device is equipped with a connecting cylinder 206. The second internal thread connecting cap 102 and the connecting block 107 are both located inside the connecting cylinder 206. A limiting groove 207 is provided axially through the connecting cylinder 206. The outer peripheral surface of the connecting block 107 is slidably engaged with the inner peripheral surface of the limiting groove 207. The connecting block 107 is slidably installed inside the limiting groove 207. The outer peripheral surface of the second internal thread connecting cap 102 is slidably engaged with the inner peripheral surface of the limiting groove 207. The second internal thread connecting cap 102 is slidably installed inside the limiting groove 207. The connecting cylinder 206 is provided with a heat insulation component, which includes a heat insulation ring 208. The heat insulation ring 208 is sleeved on the outer periphery of the connecting cylinder 206.

[0023] The right end of the tube body 1 is also provided with a limiting ring 104 and a retaining ring 103. The limiting ring 104 is located to the right of the retaining ring 103. The retaining ring 103 and the limiting ring 104 are located inside the first external threaded ring 105. The first external threaded ring 105 is provided with a retaining ring 106. The limiting ring 104 abuts against the retaining ring 106. The outer diameter of the retaining ring 103 and the limiting ring 104 is adapted to the inner diameter of the first external threaded ring. The outer periphery of the retaining ring 103 and the limiting ring 104 fits against the inner wall of the first external threaded ring.

[0024] When using this connection structure, first push the connecting cylinder 206 to the left, insert the right end of the tube body 1 into the first external threaded ring 105, so that the limiting ring 104 abuts against the retaining ring 106, then tighten the second internal threaded connecting cap 102 onto the first external threaded ring 105 (with Teflon tape), then loosen the connecting cylinder 206 so that it returns to the outside of the second internal threaded connecting cap 102 and the connecting block 107, thus completing the connection.

[0025] As can be seen from the above embodiments, the advantages of this utility model are as follows: This solution adds a protective sleeve assembly to the traditional threaded connection. The rigid limiting mechanism inside the sleeve reduces the twisting of the connecting components, minimizes damage to the sealing material, ensures the sealing and stability of the joint, and reduces the loss of residual heat medium. The springs, limiting rods, and other structures in the protective sleeve assembly enhance vibration resistance, prevent thread loosening, and extend the service life of the components. The insulation component on the connecting cylinder forms a highly efficient insulation layer, reducing heat loss, ensuring stable medium temperature, improving residual heat recovery efficiency, and the insulation ring is easy to install and maintain. The limiting groove inside the connecting cylinder achieves precise guidance and limiting, preventing thread wear due to misalignment and enhancing connection stability. The limiting ring, retaining ring, and snap ring on the pipe body form a double axial limiting mechanism, preventing excessive movement or compression of components, protecting the threaded structure, and improving connection reliability. The L-shaped pipe body is suitable for complex spaces, reducing additional connecting parts, lowering the possibility of leakage, shortening the pipeline path to reduce heat loss, and improving the flexibility of system layout.

[0026] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A connection structure for a waste heat recovery pipeline of an air compressor, comprising a pipe body (1), characterized in that, The left end of the pipe body (1) is slidably connected to a first internal threaded connecting cap (101), the right end of the pipe body (1) is slidably connected to a second internal threaded connecting cap (102), and a connector assembly is installed on the right end of the pipe body (1). The connector assembly includes a first external threaded ring (105), which is threadedly connected to the second internal threaded connecting cap (102). A connecting block (107) is fixedly connected to the right side of the first external threaded ring (105), and a second external threaded ring (108) is fixedly connected to the right side of the connecting block (107). A sheath assembly is fixedly connected to the outside of the pipe body (1).

2. The air compressor waste heat recovery pipeline connection structure according to claim 1, characterized in that, The sheath assembly includes a connecting plate (2). Two first limiting blocks (201) are provided along the outer edge of the connecting plate (2). A limiting rod (202) is slidably mounted on the first limiting block (201). A spring (203) is sleeved on the outside of the limiting rod (202). A second limiting block (205) is slidably mounted on the side of the limiting rod (202) away from the first limiting block (201). One end of the spring (203) is fixedly connected to the first limiting block (201), and the other end of the spring (203)... The end is fixedly connected to the second limiting block (205). The two ends of the limiting rod (202) are respectively provided with limiting pieces (204). The first limiting block (201), the second limiting block (205) and the spring (203) are all located between the two limiting pieces (204). A connecting cylinder (206) is fixedly installed between the two second limiting blocks (205). The second internal thread connecting cap (102) and the connecting block (107) are both located inside the connecting cylinder (206).

3. The air compressor waste heat recovery pipeline connection structure according to claim 2, characterized in that, The connecting cylinder (206) is equipped with a heat insulation component.

4. The air compressor waste heat recovery pipeline connection structure according to claim 3, characterized in that, The insulation component includes an insulation ring (208), which is sleeved on the outer periphery of the connecting cylinder (206).

5. The air compressor waste heat recovery pipeline connection structure according to claim 4, characterized in that, A limiting groove (207) is provided axially through the connecting cylinder (206). The outer peripheral surface of the connecting block (107) is slidably engaged with the inner peripheral surface of the limiting groove (207). The connecting block (107) is slidably installed inside the limiting groove (207). The outer peripheral surface of the second internal thread connecting cap (102) is slidably engaged with the inner peripheral surface of the limiting groove (207). The second internal thread connecting cap (102) is slidably installed inside the limiting groove (207).

6. The air compressor waste heat recovery pipeline connection structure according to claim 4, characterized in that, The right end of the tube body (1) is also provided with a limiting ring (104), and a retaining ring (106) is provided inside the first external threaded ring (105). The limiting ring (104) is located inside the first external threaded ring (105), and the limiting ring (104) abuts against the retaining ring (106).

7. The air compressor waste heat recovery pipeline connection structure according to claim 6, characterized in that, A retaining ring (103) is fixedly connected to the right end of the outer side of the tube body (1), and the retaining ring (103) is located inside the first external threaded ring (105).

8. The air compressor waste heat recovery pipeline connection structure according to claim 1, characterized in that, The tube body (1) is L-shaped, including a long section and a short section. The first internal threaded connector (101) is located at the end of the short section, and the second internal threaded connector (102) is located at the end of the long section.

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