Parallel rubber coating device for heat exchange pipelines
By using a combination of mounting half-rings and pushing half-rings to form an injection cavity in the heat exchange piping system, high-temperature molten plastic is injected to seal the connection between the tube bundle and the tube sheet, thus solving the problem of sealing structure failure and achieving a reliable sealing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ANHUI XINGSHENGDA REFRIGERATION COPPER TUBE MFG CO LTD
- Filing Date
- 2026-03-23
- Publication Date
- 2026-04-28
AI Technical Summary
In existing heat exchange piping systems, the sealing structure relies on rubber rings and plastic parts, which are prone to failure, resulting in unreliable sealing performance.
An installation ring and a guide ring, formed by combining an installation half-ring and a pushing half-ring, are used to form an injection cavity through a mold block. High-temperature molten plastic is injected into the connection between the tube bundle and the tube sheet, and a seal is formed after cooling.
This improved the sealing effect of the heat exchange pipeline, ensuring the reliability and durability of the connection between the tube bundle and the tube sheet.
Smart Images
Figure CN121928735A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of heat exchange pipeline technology, specifically to a parallel rubber-coated device for heat exchange pipelines. Background Technology
[0002] As is well known, parallel connection is a very common arrangement in heat exchange piping systems. Parallel heat exchange piping mainly consists of four parts: core heat exchange unit, fluid distribution unit, connection and control unit, and support structure.
[0003] Tube sheets are the most common support structure in heat exchange piping systems. In some heat exchange piping systems, tube sheets not only serve as supports to fix the tube bundles, but also as connectors to seal the joints of the heat exchange piping. However, this sealing structure mostly relies on rubber rings and pre-processed plastic parts for sealing. But rubber rings are prone to failure under continuous compression and heating from the heat source, and pre-processed plastic parts cannot perfectly fit the joints between the tube bundles and the tube sheet, resulting in unreliable sealing effects. Summary of the Invention
[0004] The purpose of this invention is to provide a parallel rubber-coated device for heat exchange pipelines to overcome the above-mentioned shortcomings in the prior art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a parallel coating device for heat exchange pipelines, comprising a tube sheet and a tube bundle fixedly mounted on the tube sheet, and further comprising symmetrically distributed mounting half-rings, wherein the mounting half-rings are provided with guide half-rings and push half-rings, and multiple mold blocks are movably mounted on the push half-rings; two mounting half-rings are combined to form a mounting ring that fits around the outside of the tube bundle; two guide half-rings are combined to form a guide ring for gathering the multiple mold blocks on the two push half-rings; the push half-rings move radially relative to the mounting rings to move the mold blocks relative to the guide rings; the guide rings gather the mold blocks to form an injection cavity; and the mounting rings and the mold blocks respectively abut against the heat dissipation fins of the tube bundle and the tube sheet.
[0006] As a further description of the above technical solution: one of the mold blocks is always higher than the other multiple mold blocks, and it is provided with a vertically upward injection pipe and an overflow pipe.
[0007] As a further description of the above technical solution: multiple channels are opened inside the multiple mold blocks, and the channels on the multiple mold blocks are aligned to form a flow channel that extends spirally along the outer wall of the injection cavity.
[0008] As a further description of the above technical solution: the channel inside the mold block includes two arc-shaped portions that are concentric and parallel to the tube bundle, and an inclined portion connecting the two arc-shaped portions.
[0009] As a further description of the above technical solution: the mold block is internally provided with a movable tube for connecting the internal arc-shaped parts of two adjacent mold blocks.
[0010] As a further description of the above technical solution: one of the mold blocks is provided with a water inlet pipe that communicates with the end of the flow channel at a position near the tube sheet.
[0011] As a further description of the above technical solution: the interior of the mounting half-ring is movably provided with an arc-shaped plate that engages with the pushing half-ring.
[0012] As a further description of the above technical solution: the guide half-ring is movably mounted on the mounting half-ring via a connecting post, and the pushing half-ring moves axially relative to the mounting half-ring so that the guide half-ring moves radially relative to the mounting half-ring.
[0013] As a further description of the above technical solution: the internal part of the mounting half-ring is movably provided with a wedge for pushing against the connecting post, and the wedge is offset from the pushing half-ring to unlock the connecting post.
[0014] As a further description of the above technical solution: the diameter of the injection cavity increases from the tube bundle to the tube sheet.
[0015] In the above technical solution, the parallel coating device for heat exchange pipelines provided by the present invention has the following beneficial effects: During installation, the push ring is installed onto the corresponding installation half-ring, the mold block is installed onto the corresponding push half-ring via the connecting rod, the two installation half-rings and their guide rings, push rings, and mold blocks are fastened to the root of the tube bundle, the two installation half-rings are combined to form an installation ring and locked, the two guide half-rings are combined to form a guide ring, the two push half-rings are combined to form a push ring, the push ring is rotated, and the push ring moves along the threads on the installation ring, and through... The connecting rod pushes the mold block to move along the slope inside the guide ring. The guide ring pushes multiple mold blocks together, and the mold blocks combine to form an injection cavity. The push ring pushes the mold block and the mounting ring. The mounting ring abuts against the heat dissipation fins, and the mold block abuts against the tube sheet. At this time, high-temperature molten plastic can be injected into the injection cavity. The liquid plastic enters the connection between the tube bundle and the tube sheet, sealing the connection. After the plastic cools and solidifies, it forms a seal attached to the connection between the tube bundle and the tube sheet. Then, the mounting ring and the mold block are removed from the tube bundle for the next operation. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.
[0017] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present invention;
[0018] Figure 2 This is a schematic diagram of the mounting ring provided in an embodiment of the present invention;
[0019] Figure 3 This is a schematic diagram of the structure of the mold block provided in an embodiment of the present invention;
[0020] Figure 4 This is a schematic diagram of the internal structure of the mounting ring provided in an embodiment of the present invention;
[0021] Figure 5 This is a schematic diagram of the internal structure of the mold block provided in an embodiment of the present invention;
[0022] Figure 6 This is a schematic diagram of the structure of the guide ring provided in an embodiment of the present invention;
[0023] Figure 7 This is a schematic diagram of the wedge block provided in an embodiment of the present invention;
[0024] Figure 8 This is a schematic diagram of the channel structure provided in an embodiment of the present invention.
[0025] Explanation of reference numerals in the attached figures:
[0026] 1. Tube sheet; 11. Mounting ring; 111. Mounting half-ring; 112. Arc plate; 113. Protrusion; 114. Pushing half-ring; 115. Wedge; 116. Triangular block; 117. Connecting rod; 12. Mold block; 121. Injection pipe; 122. Overflow pipe; 123. Channel; 124. Arc part; 125. Inclined part; 126. Flow channel; 127. Water inlet pipe; 128. Movable pipe; 129. Lever; 13. Guide ring; 131. Guide half-ring; 132. Connecting column; 133. Slider; 14. Tube bundle; 141. Heat dissipation fins. Detailed Implementation
[0027] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.
[0028] Please see Figure 1-8This invention provides a technical solution: a parallel coating device for heat exchange pipelines, including a tube sheet 1 and a tube bundle 14 fixedly installed on the tube sheet 1, and symmetrically distributed mounting half-rings 111. The mounting half-rings 111 are provided with guide half-rings 131 and push half-rings. Multiple mold blocks 12 are movably arranged on the push half-rings. Two mounting half-rings 111 are combined to form a mounting ring 11 that fits around the outside of the tube bundle 14. Two guide half-rings 131 are combined to form a guide ring 13 for gathering the multiple mold blocks 12 on the two push half-rings. The push half-rings move radially relative to the mounting rings 11 to move the mold blocks 12 relative to the guide rings 13. The guide rings 13 gather the mold blocks 12 to form an injection cavity. The mounting rings 11 and the mold blocks 12 abut against the heat dissipation fins 141 of the tube bundle 14 and the tube sheet 1, respectively.
[0029] Specifically, the mounting half-ring 111 has a groove that matches the pushing half-ring. The grooves on the two mounting half-rings 111 are combined to form an annular groove that matches the pushing ring 114 formed by the combination of the pushing half-rings. The side wall of the annular groove is provided with a thread that matches the pushing ring 114. A connecting rod 117 is slidably provided between the pushing half-ring and the mold block 12. The mold block 12 has a radial tenon groove that matches the tenon at the end of the connecting rod 117. The bottom of the pushing half-ring has an annular tenon groove that matches the tenon at the other end of the connecting rod 117. The inner wall of the guide ring 13 is provided with a ramp for guiding the movement of the mold block 12.
[0030] Furthermore, during installation, the push ring 114 is installed onto the corresponding installation half-ring 111, and the mold block 12 is installed onto the corresponding push half-ring via the connecting rod 117. The two installation half-rings 111, along with their guide rings 13, push rings 114, and mold blocks 12, are then fastened to the root of the tube bundle 14. The two installation half-rings 111 combine to form the installation ring 11 and are locked. The two guide half-rings 131 combine to form the guide ring 13, and the two push half-rings combine to form the push ring 114. Rotating the push ring 114 causes it to move along the threads on the installation ring 11 and pushes the mold block 12 along the threads via the connecting rod 117. The ramp inside the guide ring 13 moves, pushing multiple mold blocks 12 closer together. The mold blocks 12 combine to form an injection cavity, and the push ring 114 pushes the mold blocks 12 and the mounting ring 11. The mounting ring 11 abuts against the heat dissipation fins 141, and the mold blocks 12 abut against the tube sheet 1. At this time, high-temperature molten plastic can be injected into the injection cavity. The liquid plastic enters the connection between the tube bundle 14 and the tube sheet 1, sealing the connection between the tube bundle 14 and the tube sheet 1. After the plastic cools and solidifies, it forms a seal attached to the connection between the tube bundle 14 and the tube sheet 1. Then, the mounting ring 11 and the mold blocks 12 are removed from the tube bundle 14 for the next operation.
[0031] In another embodiment of the present invention, one of the mold blocks 12 is always higher than the other multiple mold blocks 12, and is provided with a vertically upward injection pipe 121 and an overflow pipe 122.
[0032] Specifically, during installation, the workers manually install the mold block 12, which is equipped with the injection pipe 121 and the overflow pipe 122, facing directly upwards. As the push ring 114 rotates relative to the mounting ring 11, the connecting rod 117 moves along the annular tenon groove on the push ring 114. The push ring 114 moves axially relative to the mounting ring 11 and pushes the mold block 12 to move. The mold block 12 moves and closes along the slope inside the guide ring 13. The tenon at the end of the connecting rod 117 moves along the radially arranged tenon groove on the mold block 12, so that the movement of the push ring 114 does not interfere with the movement of the mold block 12. After the mold block 12 closes to form the injection cavity, molten plastic is injected through the vertically upward injection pipe 121, and air is discharged through the overflow pipe 122 while observing the plastic injection situation.
[0033] In another embodiment of the present invention, the diameter of the injection cavity increases from the tube bundle 14 to the tube sheet 1.
[0034] Specifically, the sealing element that restricts the injection support in the injection cavity is a frustum-shaped structure surrounding the tube bundle 14, and a large amount of material accumulates at the connection between the tube bundle 14 and the tube sheet 1, further improving the sealing effect.
[0035] In another embodiment of the present invention, a plurality of channels 123 are provided inside the plurality of mold blocks 12, and the channels 123 on the plurality of mold blocks 12 are aligned to form a flow channel 126 extending spirally along the outer wall of the injection cavity. One of the mold blocks 12 is provided with a water inlet pipe 127 that communicates with the end of the flow channel 126 near the tube sheet 1.
[0036] Specifically, one of the mold blocks 12 has a drain outlet that communicates with the end of the spirally extending flow channel 126.
[0037] Furthermore, during the installation process, the push ring 114 pushes multiple mold blocks 12 together to form an injection cavity, and the channels 123 on the mold blocks 12 are aligned and connected to form a flow channel 126 that spirally extends along the outer wall of the injection cavity. Then, molten plastic is injected into the injection cavity through the injection pipe 121. After injection, cooling water is injected into the flow channel 126 through the water inlet pipe 127. The newly injected cooling water is close to the part where the material accumulates, and can preferentially cool that part. The part with less material at the tail end (the end of the seal away from the tube sheet 1 is the tail end) has less material and less heat accumulation, and can dissipate heat more quickly.
[0038] In another embodiment of the present invention, the channel 123 inside the mold block 12 includes two arc-shaped portions 124 that are concentric and parallel to the tube bundle 14 and an inclined portion 125 that connects the two arc-shaped portions 124. The mold block 12 is movably provided with a movable tube 128 for connecting the arc-shaped portions 124 inside two adjacent mold blocks 12.
[0039] Specifically, the mold block 12 has multiple movable tubes 128 that are slidably arranged inside. The multiple movable tubes 128 inside the same mold block 12 are connected together and are provided with levers 129 that extend to the outside of the mold block 12.
[0040] Furthermore, after the push ring 114 pushes multiple mold blocks 12 together to form an injection cavity, the lever 129 is manually moved. The lever 129 drives multiple movable tubes 128 to move along the arc-shaped portion 124 of the channel 123, so that the movable tubes 128 span two adjacent mold blocks 12, connecting the channels 123 on the two adjacent mold blocks 12. The flow channels 126 on the multiple mold blocks 12 are connected through the movable tubes 128. The multiple arc-shaped portions 124 and inclined portions 125 are connected to form a flow channel 126 that extends spirally along the outer wall of the injection cavity. The movable tubes 128 lock the adjacent mold blocks 12 together with their own curvature to form a ring structure.
[0041] In another embodiment of the present invention, the interior of the mounting half-ring 111 is provided with an arc-shaped plate 112 that engages with the pushing half-ring.
[0042] Specifically, the arc plate 112 is provided with a protrusion 113, the push half ring is provided with a groove that matches the protrusion 113, and the installation half ring 111 is provided with a sliding groove that matches the arc plate 112.
[0043] Furthermore, during the rotation of the push ring 114, the two push half rings rotate synchronously and move radially along the threads on the mounting ring 11. The push half rings push the arc plate 112 relative to the corresponding mounting half ring 111 through the protrusion 113, so that the arc plate 112 spans between the two mounting half rings 111. The two arc plates 112 cooperate to lock the two mounting half rings 111 together. As the push ring 114 moves radially relative to the mounting ring 11, the push half rings separate from the protrusion 113 on the arc plate 112, so that the two mounting half rings 111 remain in a locked state.
[0044] In another embodiment of the present invention, the guide half-ring 131 is movably mounted on the mounting half-ring 111 via the connecting post 132. The pushing half-ring moves axially relative to the mounting half-ring 111 to make the guide half-ring 131 move radially relative to the mounting half-ring 111. The mounting half-ring 111 is internally provided with a wedge 115 for pushing the connecting post 132. The wedge 115 is offset from the pushing half-ring to unlock the connecting post 132.
[0045] Specifically, the connecting post 132 is provided with a slider 133 extending into the installation half-ring 111. The installation half-ring 111 has a groove adapted to the slider 133. The slider 133 has a right-angled trapezoidal protrusion. The installation half-ring 111 has a sliding plate and a triangular block 116 fixedly installed on the sliding plate. The two inclined surfaces of the triangular block 116 respectively match the slope of the right-angled trapezoidal protrusion and the slope of the wedge block 115. A spring is provided between the wedge block 115 and the installation half-ring 111. The end of the wedge block 115 has an arc-shaped slope. The connecting rod 117 is a self-springing telescopic rod. The connecting post 132 between the installation half-ring 111 and the guide half-ring 131 will not hinder the operator from rotating the inner push ring 114.
[0046] Furthermore, during installation, the guide half-ring 131 is first pushed towards the axis of the mounting half-ring 111. The protrusion on the slider 133 is located inside the triangular block 116. Then, the pushing half-ring is inserted from the side of the groove on the mounting half-ring 111. The pushing half-ring pushes the wedge 115 away from the axis of the mounting half-ring 111 along the arc-shaped slope at the end of the wedge 115. The inclined surface of the wedge 115 pushes the triangular block 116 towards the slider 133 until the inclined surface of the triangular block 116 fits against the inclined surface of the right trapezoidal protrusion on the slider 133, locking the slider 133 and thus securing the guide half-ring 131. The two mounting half-rings 111 are fixed on the mounting half-rings 111. Then, the two mounting half-rings 111, the guide ring 13, the push ring 114 and the mold block 12 on them are fastened to the root of the tube bundle 14. The two guide half-rings 131 are combined to form the guide ring 13, and the two push half-rings are combined to form the push ring 114. The push ring 114 is rotated and moves along the thread on the mounting ring 11, pushing the arc plate 112 to move and locking the two mounting half-rings 111 together. The push ring 114 pushes the mold block 12 to move along the slope inside the guide ring 13 through the connecting rod 117. The guide ring 13 pushes multiple mold blocks 12 to come together and the mold blocks 12 are combined to form the injection cavity.
[0047] Furthermore, after the injection molding process is completed, the push ring 114 continues to rotate, compressing the connecting rod 117, causing the push half-ring and wedge block 115 to be misaligned. Under the action of the spring, the wedge block 115 moves towards the axis of the mounting half-ring 111, separating the wedge block 115 from the triangular block 116, and the slider 133 unlocks. At this time, the guide half-ring 131 and the connecting post 132 can be pushed to separate the two guide half-rings 131. The lever 129 is then reversed to unlock the mold block 12, and the mold block 12 moves radially. The slider 133 is separated from the internally cast seal by the dispersion of the motion. The slider 133 is offset from the triangular block 116. Then, the push ring 114 is rotated in the opposite direction. The ramp on the push ring 114 pushes the wedge block 115 to reset and drives the mold block 12 away from the seal to avoid the axial movement of the mold block 12 from interfering with the newly formed seal. The push ring 114 is rotated to the initial position and the arc plate 112 is pushed back into the corresponding mounting half ring 111. The mounting half ring 111 is unlocked, and the mold can be removed from the tube bundle 14.
[0048] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A parallel coating device for heat exchange pipelines, comprising a tube sheet (1) and a tube bundle (14) fixedly mounted on the tube sheet (1), characterized in that, It also includes symmetrically distributed mounting half-rings (111), on which guide half-rings (131) and push half-rings (114) are provided. Multiple mold blocks (12) are movably arranged on the push half-rings (114). Two mounting half-rings (111) are combined to form a mounting ring (11) that fits around the outside of the tube bundle (14). Two guide half-rings (131) are combined to form a guide ring (13) for gathering the multiple mold blocks (12) on the two push half-rings (114). The push half-rings (114) move radially relative to the mounting ring (11) to move the mold blocks (12) relative to the guide ring (13). The guide ring (13) gathers the mold blocks (12) to form an injection cavity. The mounting ring (11) and the mold blocks (12) abut against the heat dissipation fins (141) of the tube bundle (14) and the tube sheet (1), respectively.
2. The parallel rubber-coated heat exchange pipeline device according to claim 1, characterized in that, One of the mold blocks (12) is always higher than the other multiple mold blocks (12), and is provided with a vertically upward injection pipe (121) and an overflow pipe (122).
3. The parallel rubber-coated heat exchange pipeline device according to claim 1, characterized in that, Multiple channels (123) are provided inside the multiple mold blocks (12), and the channels (123) on the multiple mold blocks (12) are aligned to form a flow channel (126) that extends spirally along the outer wall of the injection cavity.
4. The parallel rubber-coated heat exchange pipeline device according to claim 3, characterized in that, The channel (123) inside the mold block (12) includes two arc-shaped portions (124) that are concentric and parallel to the tube bundle (14) and an inclined portion (125) connecting the two arc-shaped portions (124).
5. The parallel rubber-coated heat exchange pipeline device according to claim 4, characterized in that, The mold block (12) is internally provided with a movable tube (128) for connecting the internal arc-shaped part (124) of two adjacent mold blocks (12).
6. The parallel rubber-coated heat exchange pipeline device according to claim 3, characterized in that, One of the mold blocks (12) is provided with a water inlet pipe (127) that communicates with the end of the flow channel (126) near the tube sheet (1).
7. The parallel rubber-coated heat exchange pipeline device according to claim 1, characterized in that, The mounting half-ring (111) is internally provided with an arc-shaped plate (112) that fits into the pushing half-ring (114).
8. The parallel rubber-coated heat exchange pipeline device according to claim 1, characterized in that, The guide half-ring (131) is movably mounted on the mounting half-ring (111) via the connecting post (132), and the pushing half-ring (114) moves axially relative to the mounting half-ring (111) so that the guide half-ring (131) moves radially relative to the mounting half-ring (111).
9. A parallel rubber-coated heat exchange pipeline device according to claim 8, characterized in that, The mounting half-ring (111) is internally provided with a wedge (115) for pushing against the connecting post (132), the wedge (115) being offset from the pushing half-ring (114) to unlock the connecting post (132).
10. A parallel rubber-coated heat exchange pipeline device according to claim 1, characterized in that, The diameter of the injection cavity increases from the tube bundle (14) to the tube sheet (1).