Clamping and pushing mechanism for polishing heat exchanger tube plate holes

Abstract

The utility model relates to heat exchanger production technical field especially relates to a kind of clamping and pushing mechanism for polishing heat exchanger tube plate hole, including base, first guide frame, control mechanism and clamping mechanism, the first guide frame is fixedly arranged at the top of base, the control mechanism is clamped in the top of first guide frame, the clamping mechanism is movably connected with the top of control mechanism, the control mechanism includes mounting plate, second guide frame and crawling mechanism, the second guide frame is fixedly arranged at the top of the both ends of mounting plate, the crawling mechanism is fixedly arranged at the both sides of mounting plate, after the effective clamping and fixing of this clamping and pushing mechanism for polishing heat exchanger tube plate hole to tube plate, first, according to the adjustment of tube plate row distance, then set up tube plate surface mounting hole row distance, so that equipment is automatically advanced according to tube plate surface mounting hole row distance, ensure that mounting hole and polishing chamfer tool are concentrically arranged, realize automatic advancing, reduce the need of clamping adjustment.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger manufacturing technology, and in particular to a clamping and pushing mechanism for grinding holes in heat exchanger tube sheets. Background Technology

[0002] A heat exchanger is a device that transfers some of the heat from a hot fluid to a cold fluid; it is also called a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food, and many other industrial production processes. In chemical production, heat exchangers are widely used as heaters, coolers, condensers, evaporators, and reboilers.

[0003] Heat exchange inside the heat exchanger is achieved through internal heat exchange tubes, which are generally fixed by tube sheets. The tube sheets arrange and support the heat exchange tubes in an orderly manner. Therefore, the surface of the tube sheet needs to be made with clamping holes that mate with the heat exchange tubes. After the clamping holes are processed, the edges of the holes need to be chamfered and ground to facilitate the passage of the heat exchange tubes. Existing grinding and clamping devices can only meet the clamping requirements and cannot automatically push the tube sheet to switch the processing area based on the distance between the holes. This causes workers to spend a lot of time adjusting the clamping position and can also easily cause the processing end of the grinding device to be misaligned with the mounting hole, resulting in uneven edge processing. Utility Model Content

[0004] This utility model addresses the deficiencies in the prior art by providing a clamping and pushing mechanism for grinding holes in heat exchanger tube sheets.

[0005] This utility model is achieved through the following technical solution:

[0006] A clamping and pushing mechanism for grinding holes in a heat exchanger tube sheet includes a base, a first guide frame, a control mechanism, and a clamping mechanism. The first guide frame is fixedly mounted on the top of the base, and the control mechanism is engaged with the top of the first guide frame. The clamping mechanism is movably connected to the top of the control mechanism. The control mechanism includes a mounting plate, a second guide frame, and a crawling mechanism. The second guide frame is fixedly mounted on both ends of the top of the mounting plate, and the crawling mechanism is fixedly mounted on both sides of the mounting plate. The crawling mechanism includes a connecting plate, a first hydraulic cylinder, a pressure plate, a second hydraulic cylinder, an installation chamber, a third hydraulic cylinder, a tensioning plate, and a locking strip. The first hydraulic cylinder is fixedly mounted on the bottom of one end of the connecting plate, the pressure plate is fixedly mounted on the telescopic end of the first hydraulic cylinder, the second hydraulic cylinder is mounted on the bottom of the connecting plate, the installation chamber is fixed to the telescopic end of the second hydraulic cylinder, the third hydraulic cylinder is located on the inner bottom of the installation chamber, the tensioning plate is fixedly mounted on the telescopic end of the third hydraulic cylinder, and the locking strip is fixed to the bottom of the connecting plate.

[0007] In a preferred embodiment of this utility model, the clamping mechanism includes a sliding plate, a third guide frame, a locking knob, a fixed bracket, a movable bracket, and a screw. The sliding plate is movably disposed on the top of the second guide frame, the third guide frame is fixedly connected to the top of the sliding plate, the locking knob is threaded to both ends of the sliding plate, the fixed bracket is fixedly disposed on one end of the third guide frame, the movable bracket is movably connected to the third guide frame, and the screw is fixedly disposed inside the fixed bracket.

[0008] The clamping mechanism mainly clamps the tube sheet through fixed and movable clamps to fix the tube sheet, ensuring that the tube sheet is in a horizontal state and providing sufficient space for tool processing at its bottom.

[0009] In a preferred embodiment of this utility model, the bottom of the locking knob contacts the top of the mounting plate, one end of the screw passes through and extends to the outside of one side of the movable card seat, and a locking nut is provided on its surface by threads;

[0010] The locking nut on the screw surface applies pressure to the tail of the movable bracket, thereby effectively fixing it to the tube sheet.

[0011] In a preferred embodiment of this utility model, guide strips are fixedly provided at both ends of the top of the installation compartment, and the guide strips at both ends of the installation compartment are engaged in the inner groove of the guide strip;

[0012] The guide strips at both ends of the top of the installation compartment are locked in the slots inside the clips, which limit the installation compartment and provide effective guidance for its movement.

[0013] In a preferred embodiment of the present invention, the bottom of the mounting plate is provided with a guide groove that cooperates with the first guide frame, and the mounting plate is snapped onto the top of the first guide frame.

[0014] The beneficial effects of this utility model are:

[0015] After the heat exchanger tube sheet hole grinding clamping and pushing mechanism effectively clamps and fixes the tube sheet, it first adjusts according to the tube sheet row spacing, and then sets the row spacing of the mounting holes on the tube sheet surface. This allows the equipment to advance automatically according to the row spacing of the mounting holes on the tube sheet surface, ensuring that the mounting holes and the grinding and chamfering tools are concentrically set, achieving automatic advancement and reducing the need for clamping and adjustment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the clamping and pushing mechanism for grinding holes in the heat exchanger tube sheet according to this utility model.

[0017] Figure 2 This is a schematic diagram of the control mechanism of the clamping and pushing mechanism for grinding holes in the heat exchanger tube sheet of this utility model.

[0018] Figure 3This is a schematic diagram of the crawling mechanism structure of the clamping and pushing mechanism for grinding holes in the heat exchanger tube sheet of this utility model.

[0019] Figure 4 This is a schematic diagram of the clamping mechanism structure of the clamping and pushing mechanism for grinding holes in the heat exchanger tube sheet of this utility model.

[0020] In the diagram: 1. Base; 2. First guide frame; 3. Control mechanism; 31. Mounting plate; 32. Second guide frame; 33. Crawling mechanism; 331. Connecting plate; 332. First hydraulic cylinder; 333. Pressure plate; 334. Second hydraulic cylinder; 335. Mounting chamber; 336. Third hydraulic cylinder; 337. Tensioning plate; 338. Clamping bar; 4. Clamping mechanism; 41. Sliding plate; 42. Third guide frame; 43. Locking knob; 44. Fixed bracket; 45. Movable bracket; 46. Screw. Detailed Implementation

[0021] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. The directional terms mentioned in this utility model, such as "up," "down," "front," "back," "left," "right," "top," and "bottom," are only for reference to the accompanying drawings. Therefore, the directional terms used are for the purpose of explaining and understanding this utility model, and not for limiting this utility model.

[0022] like Figure 1-4 The clamping and pushing mechanism for grinding holes in a heat exchanger tube sheet, as shown, includes a base 1, a first guide frame 2, a control mechanism 3, and a clamping mechanism 4. The first guide frame 2 is fixedly mounted on the top of the base 1, and the control mechanism 3 is engaged with the top of the first guide frame 2. The clamping mechanism 4 is movably connected to the top of the control mechanism 3. The control mechanism 3 includes a mounting plate 31, a second guide frame 32, and a crawling mechanism 33. The second guide frame 32 is fixedly mounted on both ends of the top of the mounting plate 31, and the crawling mechanism 33 is fixedly mounted on both sides of the mounting plate 31. The crawling mechanism 33 includes a connecting plate 331 and a first hydraulic cylinder 332. The system includes a pressure plate 333, a second hydraulic cylinder 334, an installation chamber 335, a third hydraulic cylinder 336, a tensioning plate 337, and a retaining strip 338. The first hydraulic cylinder 332 is fixedly installed at the bottom of one end of the connecting plate 331. The pressure plate 333 is fixedly installed at the telescopic end of the first hydraulic cylinder 332. The second hydraulic cylinder 334 is installed at the bottom of the connecting plate 331. The installation chamber 335 is fixed to the telescopic end of the second hydraulic cylinder 334. The third hydraulic cylinder 336 is located on the inner bottom of the installation chamber 335. The tensioning plate 337 is fixedly installed at the telescopic end of the third hydraulic cylinder 336. The retaining strip 338 is fixed to the bottom of the connecting plate 331.

[0023] Specifically, the clamping mechanism 4 includes a sliding plate 41, a third guide frame 42, a locking knob 43, a fixed bracket 44, a movable bracket 45, and a screw 46. The sliding plate 41 is movably mounted on the top of the second guide frame 32. The third guide frame 42 is fixedly connected to the top of the sliding plate 41. The locking knob 43 is threaded to both ends of the sliding plate 41. The fixed bracket 44 is fixedly mounted on one end of the third guide frame 42. The movable bracket 45 is movably connected to the third guide frame 42. The screw 46 is fixedly mounted inside the fixed bracket 44. The bottom of the locking knob 43 contacts the top of the mounting plate 31. One end of the screw 46 passes through and extends to the outside of one side of the movable bracket 45. A locking nut is threaded onto its surface. Guide strips are fixedly mounted on both ends of the top of the mounting chamber 335. The guide strips at both ends of the mounting chamber 335 are engaged in the slots inside the clips 338. The bottom of the mounting plate 31 has a guide groove that cooperates with the first guide frame 2. The mounting plate 31 is engaged on the top of the first guide frame 2.

[0024] In this embodiment, the tube sheet is first clamped. The fixed clamping seat 44 and the movable clamping seat 45 have slots corresponding to the edge of the tube sheet. After the tube sheet is clamped into the slots on the top of the fixed clamping seat 44 and the movable clamping seat 45, the locking nut is tightened on the surface of the screw 46. The movable clamping seat 45 moves forward under the guidance of the third guide frame 42. Pressure applied by the nut can clamp the tube sheet between the fixed clamping seat 44 and the movable clamping seat 45. Under the action of the slots, the bottom of the tube sheet is lifted, providing space for tool processing. Subsequently, the position of the tube sheet is adjusted according to the spacing of the mounting holes on the tube sheet surface and the corresponding tool position. The sliding plate 41 is moved to the corresponding position on the surface of the second guide frame 32. After tightening the locking knob 43, the sliding plate 41 is tensioned on the top of the mounting plate 31, thereby achieving effective fixation.

[0025] Furthermore, based on the row spacing on the tube sheet surface, the extension length of the second hydraulic cylinder 334 is set. When the first mounting hole is being processed, the first hydraulic cylinder 332 extends, causing the pressure plate 333 to press against the surface of the base 1, thereby fixing the mounting plate 31. After the first round hole is processed, the second hydraulic cylinder 334 extends to the length corresponding to the row spacing, pushing the mounting chamber 335 forward under the guidance of the clamping strip 338. Then, the third hydraulic cylinder 336 extends, causing the tensioning plate 337 to press against the surface of the base 1. At this time, the first hydraulic cylinder 332 retracts first, and then controls the second hydraulic cylinder 334 to retract. At this time, the retraction of the second hydraulic cylinder 334 generates tension, causing the mounting chamber 335 to slide within the clamping strip 338, thereby moving the entire mounting plate 31 forward by one row spacing, thus realizing the automatic switching of the tube sheet surface mounting hole processing.

[0026] It should be noted that the parts not covered in this utility model are the same as or can be implemented using existing technology; the various drives in this utility model can be implemented by corresponding power structures such as cylinders, oil cylinders, electric cylinders, and motors in conjunction with connecting rods, guide rods, etc., and are not limited to the structures described in the specification and the drawings.

[0027] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," "set up," "equipped with," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A clamping and pushing mechanism for grinding holes in a heat exchanger tube sheet, comprising a base (1), a first guide frame (2), a control mechanism (3), and a clamping mechanism (4), characterized in that: The first guide frame (2) is fixedly mounted on the top of the base (1), the control mechanism (3) is mounted on the top of the first guide frame (2), and the clamping mechanism (4) is movably connected to the top of the control mechanism (3); The control mechanism (3) includes a mounting plate (31), a second guide frame (32), and a crawling mechanism (33). The second guide frame (32) is fixedly installed at both ends of the top of the mounting plate (31), and the crawling mechanism (33) is fixedly installed on both sides of the mounting plate (31). The crawling mechanism (33) includes a connecting plate (331), a first hydraulic cylinder (332), a pressure plate (333), a second hydraulic cylinder (334), an installation chamber (335), a third hydraulic cylinder (336), a tensioning plate (337), and a locking strip (338). The first hydraulic cylinder (332) is fixedly disposed at one end of the bottom of the connecting plate (331). The pressure plate (333) is fixedly disposed at the telescopic end of the first hydraulic cylinder (332). The second hydraulic cylinder (334) is installed at the bottom of the connecting plate (331). The installation chamber (335) is fixed to the telescopic end of the second hydraulic cylinder (334). The third hydraulic cylinder (336) is disposed on the inner side of the bottom of the installation chamber (335). The tensioning plate (337) is fixedly disposed at the telescopic end of the third hydraulic cylinder (336). The locking strip (338) is fixed to the bottom of the connecting plate (331).

2. The clamping and pushing mechanism for grinding heat exchanger tube sheet holes according to claim 1, characterized in that: The clamping mechanism (4) includes a sliding plate (41), a third guide frame (42), a locking knob (43), a fixed bracket (44), a movable bracket (45), and a screw (46). The sliding plate (41) is movably mounted on the top of the second guide frame (32). The third guide frame (42) is fixedly connected to the top of the sliding plate (41). The locking knob (43) is threaded to both ends of the sliding plate (41). The fixed bracket (44) is fixedly mounted on one end of the third guide frame (42). The movable bracket (45) is movably connected to the third guide frame (42). The screw (46) is fixedly mounted inside the fixed bracket (44).

3. The clamping and pushing mechanism for grinding heat exchanger tube sheet holes according to claim 2, characterized in that: The bottom of the locking knob (43) contacts the top of the mounting plate (31), and one end of the screw (46) passes through and extends to the outside of one side of the movable bracket (45), and a locking nut is provided on its surface by thread.

4. The clamping and pushing mechanism for grinding heat exchanger tube sheet holes according to claim 1, characterized in that: Guide strips are fixedly installed at both ends of the top of the installation compartment (335), and the guide strips at both ends of the installation compartment (335) are engaged in the slots inside the clips (338).

5. The clamping and pushing mechanism for grinding heat exchanger tube sheet holes according to claim 1, characterized in that: The bottom of the mounting plate (31) is provided with a guide groove that cooperates with the first guide frame (2), and the mounting plate (31) is locked on the top of the first guide frame (2).

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