Impurity-proof heat exchanger connection

Abstract

This utility model provides a heat exchanger connector for preventing impurities from entering, comprising: an end cap, a positioning pin, a shaft plate, a lower shaft sleeve, and a connector. The positioning pin passes through the shaft plate and the lower shaft sleeve, and is rotatable relative to the shaft plate and the lower shaft sleeve. The connector has a barrel-shaped structure, with the shaft plate and the lower shaft sleeve located inside the connector. The positioning pin passes through the sealing end of the connector, and the lower shaft sleeve extends into the gap between the inner wall of the connector and the positioning pin. The end cap is detachably connected to the open end of the connector, preventing the positioning pin, shaft plate, and lower shaft sleeve from detaching from the connector. The end of the positioning pin located outside the connector is used to install a spiral tie. This heat exchanger connector for preventing impurities from entering tightly fits the gap between the inner wall of the connector and the positioning pin through the guide section of the lower shaft sleeve, forming a sealed space that effectively prevents impurities from entering from the side.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger connectors, specifically to a heat exchanger connector designed to prevent impurities from entering. Background Technology

[0002] Heat exchanger connectors are widely used in modern industrial production. However, traditional heat exchanger connector designs have some shortcomings.

[0003] Chinese patent CN216049420U discloses an online cleaning device for scale prevention and removal in condensers and heat exchangers. This device includes a rotating rod integrally formed from a cap and a rod body, several washers, a support bracket, and a spiral cap and sleeve made of metal. The spiral cap is fitted onto the cap body, and the sleeve is fitted onto the rod body at the connection point between the rod body and the cap body. A spiral band is connected to one end of the rod body away from the connection point, passing through the support bracket. During operation, the spiral band is fixed inside the pipe wall of the condenser and heat exchanger by the support bracket. The spiral band rotates freely within the pipe with the rotating rod, performing scale prevention and removal treatment, and uniformizing the temperature within the condenser and heat exchanger.

[0004] The existing online cleaning devices for scale prevention and removal in condensers and heat exchangers typically use a simple threaded connection to install a rotating cover on a rotating rod. Components (gaskets) between the rotating cover and the connecting part are exposed, making it easy for impurities to get stuck between the connecting part and the rotating rod. After long-term use, this can lead to jamming at the connection point, preventing the spiral belt auxiliary cleaning function on the rotating rod from being realized. Utility Model Content

[0005] This utility model provides a heat exchanger connector that prevents impurities from entering, solving the problem in the prior art where impurities easily get stuck in the gap between the rotating rod and the connecting part, causing the spiral ribbon to be unable to rotate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The present invention provides a heat exchanger connector for preventing impurities from entering, comprising: an end cap, a positioning pin, a shaft plate, a lower shaft sleeve, and a connector. The positioning pin passes through the shaft plate and the lower shaft sleeve, and the positioning pin can rotate relative to the shaft plate and the lower shaft sleeve. The connector has a barrel-shaped structure, with the shaft plate and the lower shaft sleeve located inside the connector. The positioning pin passes through the sealing end of the connector, and the lower shaft sleeve extends into the gap between the inner wall of the connector and the positioning pin. The end cap is detachably connected to the open end of the connector. The end cap restricts the positioning pin, the shaft plate, and the lower shaft sleeve from detaching from the connector. The end of the positioning pin located outside the connector is used to install a spiral ribbon.

[0007] Preferably, the end of the locating pin inside the connector protrudes to form a cone, and the inner top wall of the end cap is recessed to form a cone hole, the inner wall of the cone hole being used to guide the rotation of the cone.

[0008] Preferably, the connector includes a connecting cylinder and an extension foot. The connecting cylinder is equipped with a positioning pin, a shaft piece, and a lower bushing. The side of the connecting cylinder is connected to one end of the extension foot, and the other end of the extension foot extends to the side of the spiral ribbon.

[0009] Preferably, the positioning pin includes a pin head and a pin rod, the ends of the pin head and the pin rod being fixed away from the spiral ribbon, a cone being formed on the pin head, and a notch being provided at the end of the pin rod outside the connector for the end of the spiral ribbon to be inserted.

[0010] Preferably, the lower bushing includes a guide section and an anti-detachment section. The connector has a through hole for the locating pin to pass through. The guide section extends into the gap between the inner wall of the through hole and the locating pin. The anti-detachment section is located between the inner bottom wall of the connector and the shaft piece, and the outer diameter of the anti-detachment section is larger than the outer diameter of the guide section.

[0011] Preferably, the end cap presses against the large end of the locating pin, and the large end of the locating pin presses the shaft piece and the anti-disengagement section against the inner bottom wall of the connector.

[0012] Preferably, the large end of the cone is fixed to the locating pin, and the small end of the cone extends into the end cap.

[0013] Compared to existing technologies, this invention offers the following advantages: The impurity-proof heat exchanger connector features a guide section on the lower bushing that tightly fits against the gap between the connector's inner wall and the locating pin, creating a sealed space that effectively prevents impurities from entering from the side. The stepped structure of the anti-detachment section, combined with the clamping action of the end cap, forms a dual limiting mechanism, ensuring the shaft and lower bushing remain stable even under vibration or pressure changes. Simultaneously, the notch at the end of the locating pin, in conjunction with the spiral ribbon, enables rapid installation and allows the locating pin to rotate under stress, preventing the accumulation of internal stress caused by thermal expansion and contraction.

[0014] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0015] Figure 1 Schematic diagram of a heat exchanger connector designed to prevent impurities from entering.

[0016] Figure 2 Explosion diagram of heat exchanger connection to prevent impurities from entering

[0017] Reference numerals: end cap 1, tapered hole 11, locating pin 2, tapered head 21, pin head 22, pin rod 23, notch 231, shaft piece 3, lower bushing 4, guide section 41, anti-detachment section 42, connector 5, connecting cylinder 51, extension foot 52. Detailed Implementation

[0018] To make the technical means, creative features, achieved objectives and functions of this utility model clearer and easier to understand, the utility model will be further described below with reference to the accompanying drawings and specific embodiments:

[0019] like Figure 1 as well as Figure 2 As shown, this utility model proposes a heat exchanger connector with impurity-proof design, comprising: an end cap 1, a positioning pin 2, a shaft plate 3, a lower shaft sleeve 4, and a connector 5. The positioning pin 2 passes through the shaft plate 3 and the lower shaft sleeve 4, and is rotatable relative to the shaft plate 3 and the lower shaft sleeve 4. The connector 5 has a barrel-shaped structure, with the shaft plate 3 and the lower shaft sleeve 4 located inside the connector 5. The positioning pin 2 passes through the sealing end of the connector 5, and the lower shaft sleeve 4 extends into the gap between the inner wall of the connector 5 and the positioning pin 2. The end cap 1 is detachably connected to the open end of the connector 5, and the end cap 1 restricts the positioning pin 2, the shaft plate 3, and the lower shaft sleeve 4 from detaching from the connector 5. The end of the positioning pin 2 located outside the connector 5 is used to install a spiral tie. The connector 5 has a barrel-shaped structure, internally accommodating the shaft plate 3 and the lower shaft sleeve 4. The positioning pin 2 passes through the sealing end of the connector 5 to prevent impurities from entering from the sealing end. The lower shaft sleeve 4 extends into the gap between the inner wall of the connector 5 and the positioning pin 2, further blocking impurities from entering. The end cap 1 is detachably connected to the open end of the connector 5 to ensure that the positioning pin 2, the shaft piece 3 and the lower bushing 4 will not detach from the connector 5.

[0020] The end of the locating pin 2 located inside the connector 5 protrudes to form a cone 21, and the inner top wall of the end cap 1 is recessed to form a cone hole 11. The inner wall of the cone hole 11 is used to guide the rotation of the cone 21. Although in the prior art, the lower bushing 4 guides the rotation of the locating pin 2, the torque on the locating pin 2 is relatively large when the spiral belt rotates. If only the lower bushing 4 guides the rotation of the locating pin 2, the lower bushing 4 can only guide a small part of the rotation of the locating pin 2. Under the condition of large torque, the inner wall of the lower bushing 4 and the outer wall of the locating pin 2 are prone to large wear. Therefore, this application designs a fit between the cone 21 and the cone hole 11 on the end cap 1. When the spiral ribbon rotates, the cone 21 fits tightly with the cone hole 11. The inner wall of the cone hole 11 guides the cone 21, so that one end of the positioning pin 2 is guided, and the middle of the positioning pin 2 is guided by the lower bushing 4. The two guides fully position the positioning pin 2, preventing the positioning pin 2 from shifting, and effectively avoiding the phenomenon of the positioning pin 2 shifting or jamming due to vibration or uneven force.

[0021] The connector 5 includes a connecting cylinder 51 and an extension foot 52. A positioning pin 2, a shaft plate 3, and a lower bushing 4 are installed inside the connecting cylinder 51. The side of the connecting cylinder 51 is connected to one end of the extension foot 52, and the other end of the extension foot 52 extends to the side of the spiral belt. The positioning pin 2, shaft plate 3, and lower bushing 4 are installed inside the connecting cylinder 51 to form a sealed space. The end of the positioning pin 2 near the extension foot 52 is connected to an external rotating belt, allowing the positioning pin 2 to rotate with the rotating belt. The extension foot 52 is used to limit the vibration range of the rotating belt during rotation, thereby increasing stability during rotation.

[0022] The positioning pin 2 includes a pin head 22 and a pin rod 23. The ends of the pin head 22 and the pin rod 23 away from the spiral ribbon are fixed. A cone 21 is formed on the pin head 22. The end of the pin rod 23 located outside the connector 5 has a notch 231 for inserting the end of the spiral ribbon. The notch 231 at the end of the pin rod 23 located outside the connector 5 allows the end of the spiral ribbon to be inserted into the notch 231, thus connecting the positioning pin 2 to the spiral ribbon. This enables the positioning pin 2 to drive the spiral ribbon when rotating, and the notch 231 design also facilitates the installation and removal of the spiral ribbon.

[0023] The lower bushing 4 includes a guide section 41 and an anti-detachment section 42. The connector 5 has a through hole for the positioning pin 2 to pass through. The guide section 41 extends into the gap between the inner wall of the through hole and the positioning pin 2. The anti-detachment section 42 is located between the inner bottom wall of the connector 5 and the shaft piece 3, and its outer diameter is larger than that of the guide section 41. The positioning pin 2 passes through the lower bushing 4. The guide section 41 of the lower bushing 4 extends into the gap between the inner wall of the through hole of the connector 5 and the positioning pin 2, serving a guiding function to allow the positioning pin 2 to rotate smoothly and prevent impurities from entering through the gap. The anti-detachment section 42 is located between the inner bottom wall of the connector 5 and the shaft piece 3, and its outer diameter is larger than that of the guide section 41, preventing the lower bushing 4 from detaching from the connector 5.

[0024] End cap 1 presses the large end of positioning pin 2, which in turn presses the shaft piece 3 and the anti-disengagement section 42 onto the inner bottom wall of connector 5. End cap 1 presses the large end of positioning pin 2, thereby applying pressure to tightly press the shaft piece 3 and the anti-disengagement section 42 of the lower bushing 4 onto the inner bottom wall of connector 5.

[0025] The large end of the cone 21 is fixed to the positioning pin 2, and the small end of the cone 21 extends into the end cover 1. The fixing of the large end of the cone 21 to the positioning pin 2 ensures the firmness of the connection. When the end cover 1 is installed at the open end of the connector 5, the small end of the cone 21 enters the end cover 1 and cooperates with the cone hole 11 on the inner top wall of the end cover 1, which plays a guiding and positioning role, ensuring that the positioning pin 2 can drive the entire connector 5 and the spiral ribbon to rotate smoothly when rotating.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A connection for a heat exchanger which is protected against the ingress of impurities, characterized in that include: The end cap (1), positioning pin (2), shaft piece (3), lower bushing (4) and connector (5) are provided. The positioning pin (2) passes through the shaft piece (3) and the lower bushing (4) and can rotate relative to the shaft piece (3) and the lower bushing (4). The connector (5) has a barrel-shaped structure. The shaft piece (3) and the lower bushing (4) are located inside the connector (5). The positioning pin (2) passes through the sealing end of the connector (5). The lower bushing (4) extends into the gap between the inner wall of the connector (5) and the positioning pin (2). The end cap (1) and the open end of the connector (5) are detachably connected. The end cap (1) restricts the positioning pin (2), shaft piece (3) and lower bushing (4) from disengaging from the connector (5). The end of the positioning pin (2) located outside the connector (5) is used to install a spiral ribbon.

2. The impurity ingress preventing heat exchanger connection according to claim 1, characterized in that The end of the positioning pin (2) protrudes inside the connector (5) to form a cone (21), and the inner top wall of the end cap (1) is recessed to form a cone hole (11). The inner wall of the cone hole (11) is used to guide the cone (21) to rotate.

3. The impurity ingress preventing heat exchanger connection of claim 2, wherein, The connector (5) includes a connecting cylinder (51) and an extension foot (52). The connecting cylinder (51) is equipped with a positioning pin (2), a shaft piece (3) and a lower bushing (4). The side of the connecting cylinder (51) is connected to one end of the extension foot (52), and the other end of the extension foot (52) extends to the side of the spiral ribbon.

4. The impurity ingress preventing heat exchanger connection of claim 3, wherein, The positioning pin (2) includes a pin head (22) and a pin rod (23). The ends of the pin head (22) and the pin rod (23) away from the spiral ribbon are fixed. A cone (21) is formed on the pin head (22). The end of the pin rod (23) located outside the connector (5) has a notch (231) for inserting the end of the spiral ribbon.

5. The impurity ingress preventing heat exchanger connection according to any one of claims 1 to 4, characterized in that The lower bushing (4) includes a guide section (41) and an anti-detachment section (42). The connector (5) has a through hole for the positioning pin (2) to pass through. The guide section (41) extends into the gap between the inner wall of the through hole and the positioning pin (2). The anti-detachment section (42) is located between the inner bottom wall of the connector (5) and the shaft piece (3). The outer diameter of the anti-detachment section (42) is larger than the outer diameter of the guide section (41).

6. The impurity ingress preventing heat exchanger connection of claim 5, wherein, The end cap (1) presses the large end of the positioning pin (2), and the large end of the positioning pin (2) presses the shaft piece (3) and the anti-detachment section (42) onto the inner bottom wall of the connector (5).

7. The impurity ingress preventing heat exchanger connection of claim 2, wherein, The large end of the cone (21) is fixed to the positioning pin (2), and the small end of the cone (21) extends into the end cap (1).

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