Special pipe joint ferrule screw

Abstract

The utility model relates to a special pipe joint ferrule screw which is suitable for connecting a heat exchange pipe and a heat collection header and comprises a nut and a screw rod. The nut is in through connection with the heat exchange tube, and the screw is in through connection with the heat exchange tube; a protruding part is arranged in the middle of the outer wall of the screw rod, and the screw rod is connected to the protruding part through a nut screw. A pressing piece and a sealing clamping sleeve are arranged between the screw rod and the nut, an opening of the pressing piece is in contact with the pipe wall of the heat exchange pipe, an opening of the sealing clamping sleeve is in contact with the pipe wall of the heat exchange pipe, one end of the pressing piece is extruded with the nut, the other end of the pressing piece is extruded with one end of the sealing clamping sleeve, and the other end of the sealing clamping sleeve is extruded with the screw rod; specifically, the inner diameter of the end, close to the heat exchange tube, of the nut is smaller than that of the end, close to the screw, of the nut, and the outer diameter of the pressing piece is larger than that of the end, close to the heat exchange tube, of the nut. The outer diameter of the end, away from the nut, of the sealing clamping sleeve is larger than the inner diameter of the end, away from the heat exchange pipe, of the screw.

Description

Technical Field

[0001] The present application relates to the technical field of screws, and in particular to a special pipe joint clamping screw. Background Art

[0002] Screws are tools that use the physics and mathematical principles of the circular rotation of the inclined surface of an object and the friction force to gradually fasten objects and parts. Screws are a general term for fasteners and a daily colloquialism. Screws are indispensable industrial necessities in daily life: such as very small screws used in cameras, glasses, clocks, electronics, etc.; general screws for televisions, electrical products, musical instruments, furniture, etc.; as for engineering, construction, and bridges, large screws and nuts are used; transportation equipment, airplanes, trams, cars, etc. use both large and small screws. Screws have important tasks in industry, and as long as there is industry on the earth, the function of screws will always be important.

[0003] The vacuum tube of the medium-temperature solar water heating system is the core component of the solar water heating system and is called the "heart" of the medium-temperature solar water heating system. The quality of the vacuum tube directly affects the service life and performance of the solar water heating system. The rapid development of the solar energy industry has not only driven the development of vacuum tube companies, but also promoted the employment of local personnel.

[0004] In the existing solar vacuum collector tubes, the U-shaped heat exchange tubes and the T-shaped tubes of the collector header are mainly connected by threaded connection to form an integral pipeline. The T-shaped pipe fittings need to be sealed and connected to the U-shaped heat exchange tubes through sealing rings. Once the sealing rings are damaged, they need to be replaced repeatedly. In addition, in order to fix the position of the U-shaped heat exchange tubes in the collector header, most of them are fixedly welded to the head of the collector header. Therefore, when leakage occurs between the heat exchange tubes and the T-shaped tubes, it is difficult to replace the screws in time, which wastes labor costs. Therefore, the prior art urgently needs an improved connecting screw for connecting the heat exchange tubes and the collector header in the medium-temperature solar vacuum collector. Utility Model Content

[0005] In view of this, the present application proposes a special pipe joint clamping screw to solve the above problem.

[0006] According to one aspect of the present application, a special pipe joint ferrule screw is proposed, which is suitable for connecting a heat exchange tube and a heat collecting manifold, and comprises: a nut and a screw; the nut is connected through the heat exchange tube, and the screw is connected through the heat exchange tube; a raised portion is provided in the middle of the outer wall of the screw, and the nut screw connects the screw to the raised portion; a clamping piece and a sealing ferrule are provided between the screw and the nut, an opening of the clamping piece contacts the tube wall of the heat exchange tube, an opening of the sealing ferrule contacts the tube wall of the heat exchange tube, and one end of the clamping piece is in contact with the tube wall of the heat exchange tube. The outer diameter of the compression piece is larger than the inner diameter of the nut end close to the heat exchange tube; the inner diameter of the screw end close to the nut is larger than the inner diameter of the screw end away from the nut; the inner diameter of the screw end close to the nut is larger than the inner diameter of the screw end away from the nut, and the outer diameter of the sealing sleeve end away from the nut is larger than the inner diameter of the screw end away from the heat exchange tube.

[0007] In a possible implementation, a groove is provided at one end of the nut away from the screw rod, and the groove is snap-fitted on the heat collecting manifold.

[0008] In a possible implementation, a first through hole is provided in the middle of the nut, and an internal thread is provided in the first through hole near the end of the screw rod; a first external thread is provided at one end of the screw rod near the nut, and the first external thread matches the internal thread.

[0009] In a possible implementation manner, a second through hole is provided in the middle of the screw rod, and the second through hole is in a conical structure shape.

[0010] In a possible implementation, a second external thread is provided at one end of the screw rod away from the nut, and the second external thread is connected to a T-shaped connector.

[0011] In a possible implementation, the groove is arranged along the circumference of the nut, and the groove is in an annular structure.

[0012] In a possible implementation, the sealing ferrule has a truncated cone structure, and the end of the sealing ferrule with a larger cross-sectional area is close to the nut, and the end of the sealing ferrule with a smaller cross-sectional area is close to the screw.

[0013] In a possible implementation, the raised portion is annularly arranged, and the outer wall of the middle portion of the nut is a hexagonal surface structure; and the nut is a hexagonal nut.

[0014] In one possible implementation, the cross-sectional area of ​​one end of the screw close to the sealing sleeve is smaller than the cross-sectional area of ​​one end of the screw away from the sealing sleeve, and the cross-sectional area of ​​one end of the screw away from the sealing sleeve is smaller than the cross-sectional area of ​​the middle part of the screw.

[0015] In a possible implementation, the screw is made of stainless steel.

[0016] Beneficial effects of this application:

[0017] The special pipe joint sleeve screw proposed in the present application is connected by inserting the heat exchange tube into the inside of the screw by inserting the nut into the screw, and the nut is screwed to the screw. The connection method is simple, and because a compression piece and a sealing sleeve are provided between the screw and the nut, when the nut and the screw are screwed, the compression piece and the sealing sleeve are squeezed, so that the sealing sleeve and the compression piece squeeze the heat exchange tube, and the inner edge of the sealing sleeve is stuck in the heat exchange tube, thereby achieving fixed sealing and reducing the number of disassembly due to insufficient sealing. A raised portion is provided in the middle of the outer wall of the screw, and when maintenance is required, the handle is directly brought into contact with the raised portion to generate friction, thereby improving the maintenance efficiency of the maintenance personnel.

[0018] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0020] Figure 1 A schematic diagram showing the structure of a special pipe joint sleeve screw according to an embodiment of the present application;

[0021] Figure 2 A schematic diagram showing the installation of the special pipe joint sleeve screw and the heat exchange tube in the embodiment of the present application;

[0022] Figure 3 A schematic diagram showing the use of the dedicated pipe joint ferrule screws, heat exchange tubes and heat collection manifold in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0023] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0024] Among them, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0027] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0028] Figure 1 A schematic diagram showing the structure of a special pipe joint sleeve screw according to an embodiment of the present application; Figure 2 A schematic diagram showing the installation of the special pipe joint sleeve screw and the heat exchange tube in the embodiment of the present application; Figure 3 The schematic diagram of the use of the special pipe joint sleeve screw, heat exchange tube and heat collection header of the embodiment of the present application is shown. Figure 1 and Figure 2As shown, the special pipe joint sleeve screw 10 is suitable for connecting the heat exchange tube 20 and the heat collecting manifold 30, and includes: a nut 400 and a screw 100; the nut 400 is connected to the heat exchange tube 20, and the screw 100 is connected to the heat exchange tube 20; a raised portion 110 is provided in the middle of the outer wall of the screw 100, and the nut 400 screw 10 connects the screw 100 to the raised portion 110; a pressing piece 300 and a sealing sleeve 200 are provided between the screw 100 and the nut 400, the opening of the pressing piece 300 is in contact with the tube wall of the heat exchange tube 20, the opening of the sealing sleeve 200 is in contact with the tube wall of the heat exchange tube 20, and one end of the pressing piece 300 is in contact with the tube wall of the heat exchange tube 20. The nut 400 is pressed against the other end of the pressing piece 300, and the other end of the sealing sleeve 200 is pressed against the screw 100; specifically, the inner diameter of the nut 400 close to the heat exchange tube 20 is smaller than the inner diameter of the nut 400 close to the screw 100, and the outer diameter of the pressing piece 300 is larger than the inner diameter of the nut 400 close to the heat exchange tube 20; the inner diameter of the screw 100 close to the nut 400 is larger than the inner diameter of the screw 100 away from the nut 400, and the outer diameter of the sealing sleeve 200 away from the nut 400 is larger than the inner diameter of the screw 100 away from the heat exchange tube 20.

[0029] The special pipe joint sleeve screw 10 proposed in this embodiment is installed by the installer by connecting one end of the heat exchange tube 20 to one end of the nut 400, and the other end of the nut 400 is connected to the screw 100, so that the heat exchange tube 20 is placed inside the screw 100, and the other end of the screw 100 is connected to the T-type connector, so that the heat exchange tube 20 is connected to the heat collecting manifold 30. By installing a pressing piece 300 and a sealing sleeve 200 between the nut 400 and the screw 100, the sealing performance of the connection between the nut 400 and the screw 100 is stronger, and because the pressing piece 300 and the sealing sleeve 200 are double protected, and the sealing sleeve 200 is not easy to be damaged, it is reduced for maintenance personnel to repair the seal between the heat exchange tube 20 and the T-tube. Specifically, the nut 400 and the screw 100 squeeze the sealing sleeve 200, so that the sealing sleeve 200 is elastically deformed, which prevents the nut 400 from loosening on the one hand, and absorbs the vibration of the hydraulic pipeline on the other hand, thereby ensuring the sealing in the pipeline and reducing the number of times the U-shaped heat exchange tube 20 and the T-shaped tube at the head of the heat collecting manifold 30 are disassembled. Further, if it is necessary to inspect the sealing between the heat exchange tube 20 and the heat collecting manifold 30, the raised portion 110 in the middle of the outer wall of the screw 100 can be rotated to loosen the screw 100 and the nut 400 or / and the screw 100 and the connector, thereby improving the maintenance efficiency of the maintenance personnel.

[0030] like Figure 3 As shown, in one of the specific embodiments, a groove 410 is provided at one end of the nut 400 away from the screw 100, and the groove 410 is snap-fitted on the heat collecting manifold 30. In this embodiment, it should be noted that the groove 410 is used to fix the screw 10 on the heat collecting manifold 30. Specifically, fixing members 31 are provided on the left and right sides of the head of the heat collecting manifold 30, and the fixing members 31 are symmetrically arranged in the middle and upper part of the heat collecting manifold 30, and the fixing members 31 are in contact with the groove 410, and the end of the fixing member 31 close to the groove 410 matches the shape of the groove 410, that is, the fixing member 31 is in a rectangular structure, and the end close to the groove 410 is in an arc structure that is concave outward. It should also be noted that the ratio of the outer diameter of the annular groove 410 to the outer diameter of the nut 400 is: 3:4-1:2, and the ratio of the setting length of the groove 410 to the length of the nut 400 is: 1:7-1:11. The outer diameter of the groove 410 is generally preferably 12 mm, and the setting length of the groove 410 is generally preferably 2.8 mm.

[0031] In one specific embodiment, a first through hole 420 is provided in the middle of the nut 400, and an internal thread 421 is provided at the end of the first through hole 420 close to the screw 100; a first external thread 120 is provided at one end of the screw 100 close to the nut 400, and the first external thread 120 matches the internal thread 421. In this embodiment, it should be noted that the length of the first external thread 120 is 14.7 mm, and it should also be noted that the diameter of the internal thread 421 is 15 mm, and the diameter of the first through hole 420 is 10.5 mm.

[0032] In one specific embodiment, a second through hole is provided in the middle of the screw 100, and the second through hole is in a conical structure. In this embodiment, it should be noted that the inner diameter of the second through hole near the end of the nut 400 is generally preferably 13.4 mm, and the inner diameter of the second through hole away from the end of the nut 400 is generally 10.3 mm-12.5 mm. The diameter of the through hole at the tapered part is preferably 10.3 mm, and the inner diameter of the smallest part can be 9 mm.

[0033] In one specific embodiment, the end of the screw 100 away from the nut 400 is provided with a second external thread 130, and the second external thread 130 is connected to the T-shaped connector. In this embodiment, it should be noted that the length of the second external thread 130 is 6.7 mm;

[0034] In summary, it should be noted that the length of the screw 100 is 34.3 mm; the length of the raised portion 110 is 8.5 mm; the length of the threadless portion of the screw 100 is 2 mm, and the length of the thread-leading portion of the screw 100 is 0.5 mm.

[0035] In one specific embodiment, the groove 410 is arranged along the circumference of the nut 400 , and the groove 410 is in an annular structure.

[0036] In one specific embodiment, the sealing ferrule 200 is in a truncated cone structure, the end of the sealing ferrule 200 with a larger cross-sectional area is close to the nut 400, and the end of the sealing ferrule 200 with a smaller cross-sectional area is close to the screw 100. A through hole is provided in the middle of the sealing ferrule 200, and the cross-section of the through hole is a circular structure. It should also be noted that the height of the sealing ferrule 200 is generally preferably 2.95mm-5mm, and the upper diameter of the sealing ferrule 200 is generally preferably 13mm; the lower diameter of the sealing ferrule 200 is generally preferably 11.2mm, and the taper of the sealing ferrule 200 is generally preferably 45°. The diameter of the through hole of the sealing ferrule 200 is generally preferably 10.1mm, and the smallest part of the through hole is preferably 9mm. It should be further noted that the sealing ferrule 200 is elastic.

[0037] In one specific embodiment, the protrusion 110 is annular, the outer wall of the middle part of the nut 400 is a hexagonal surface structure; the nut 400 is a hexagonal nut 400. In this embodiment, it should be noted that the protrusion 110 is a regular hexagonal column structure, the diameter of the nut 400 is 21.4 mm, and the hexagonal height is 28 mm.

[0038] In one specific embodiment, the cross-sectional area of ​​the end of the screw 100 close to the sealing ferrule 200 is smaller than the cross-sectional area of ​​the end of the screw 100 away from the sealing ferrule 200, and the cross-sectional area of ​​the end of the screw 100 away from the sealing ferrule 200 is smaller than the cross-sectional area of ​​the middle part of the screw 100. In this embodiment, it should be noted that the outer diameter of the first external thread 120 is 15.86 mm, and the outer diameter of the second external thread 130 is 20.6 mm.

[0039] In one specific embodiment, the material of the screw 10 is stainless steel. In this embodiment, it should be noted that the material of the screw 10 is preferably 304 / 306 stainless steel.

[0040] It should be noted that, although the present application introduces the special pipe joint sleeve screw as an example, those skilled in the art will understand that the present application should not be limited thereto. In fact, the user can flexibly set it according to personal preferences and / or actual application scenarios, as long as it is reasonable.

[0041] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A special pipe joint sleeve screw, suitable for connecting heat exchange tubes and heat collection headers, characterized in that: include: A nut and a screw; the nut is connected to the heat exchange tube, and the screw is connected to the heat exchange tube; a raised portion is provided in the middle of the outer wall of the screw, and the nut screw connects the screw to the raised portion; A pressing piece and a sealing sleeve are arranged between the screw and the nut, the opening of the pressing piece contacts the wall of the heat exchange tube, the opening of the sealing sleeve contacts the wall of the heat exchange tube, one end of the pressing piece is pressed against the nut, the other end of the pressing piece is pressed against one end of the sealing sleeve, and the other end of the sealing sleeve is pressed against the screw; Specifically, the inner diameter of the nut at one end close to the heat exchange tube is smaller than the inner diameter of the nut at one end close to the screw rod, and the outer diameter of the pressing member is larger than the inner diameter of the nut at one end close to the heat exchange tube; The inner diameter of the end of the screw rod close to the nut is larger than the inner diameter of the end of the screw rod away from the nut, and the outer diameter of the end of the sealing sleeve away from the nut is larger than the inner diameter of the end of the screw rod away from the heat exchange tube.

2. The special pipe joint clamping screw according to claim 1, characterized in that: A groove is arranged at one end of the nut away from the screw rod, and the groove is snap-fitted on the heat collecting manifold.

3. The special pipe joint clamping screw according to claim 1, characterized in that: A first through hole is arranged in the middle of the nut, and an internal thread is arranged in the first through hole near the end of the screw rod; a first external thread is arranged at one end of the screw rod near the nut, and the first external thread matches the internal thread.

4. The special pipe joint clamping screw according to claim 1, characterized in that: A second through hole is arranged in the middle of the screw rod, and the second through hole is in a conical structure shape.

5. The special pipe joint clamping screw according to claim 1, characterized in that: One end of the screw rod away from the nut is provided with a second external thread, and the second external thread is connected to the T-shaped connector.

6. The special pipe joint sleeve screw according to claim 2, characterized in that: The groove is arranged along the circumference of the nut, and the groove is in an annular structure.

7. The special pipe joint clamping screw according to any one of claims 1 to 6, characterized in that: The sealing ferrule is in a truncated cone structure, the end of the sealing ferrule with a larger cross-sectional area is close to the nut, and the end of the sealing ferrule with a smaller cross-sectional area is close to the screw.

8. The special pipe joint clamping screw according to any one of claims 1 to 6, characterized in that: The protrusion is arranged in a ring shape, and the outer wall of the middle part of the nut is in a hexagonal surface structure; the nut is a hexagonal nut.

9. The special pipe joint clamping screw according to any one of claims 1 to 6, characterized in that: The cross-sectional area of ​​one end of the screw rod close to the sealing sleeve is smaller than the cross-sectional area of ​​one end of the screw rod away from the sealing sleeve, and the cross-sectional area of ​​one end of the screw rod away from the sealing sleeve is smaller than the cross-sectional area of ​​the middle part of the screw rod.

10. The special pipe joint clamping screw according to any one of claims 1 to 6, characterized in that: The screw is made of stainless steel.

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