Pipe penetrating guide device for heat exchanger

Abstract

The utility model relates to the technical field of heat exchanger production equipment, in particular to a heat exchanger pipe penetrating guide device which comprises a guide pipe matched with a heat exchange pipe, the head of the guide pipe is conical, the tail of the guide pipe is cylindrical, the outer diameter of the tail of the guide pipe is not larger than that of the heat exchange pipe, and the tail of the guide pipe is fixedly connected with a connecting pipe. The outer diameter of the connecting pipe is smaller than the outer diameter of the tail of the guide pipe and the inner diameter of the heat exchange pipe, and a locking assembly is arranged in the connecting pipe. The locking assembly comprises two clamping blocks, a compression spring is connected between the two clamping blocks, the two clamping blocks are fixedly connected with connecting arms respectively, one ends of the two connecting arms are hinged through a hinge shaft, the hinge shaft is connected with a pull rod, and one end of the pull rod penetrates through the connecting pipe, then extends into the guide pipe and is connected with an adjusting piece. The pull rod is controlled by the adjusting piece to move in the connecting pipe and the guide pipe. According to the utility model, the guide pipe and the heat exchange pipe can be conveniently connected and detached, the guide pipe is prevented from falling off in the pipe penetrating process, and the pipe penetrating efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchanger production equipment, and specifically relates to a heat exchanger pipe threading guide device. Background Art

[0002] During the production of pressure vessels (heat exchangers), it is necessary to perform a tube threading operation, that is, each heat exchange tube is sequentially passed through the corresponding holes on each support plate and baffle. During the tube threading operation, the heat exchange tube often cannot pass through the support plate smoothly. The reason is that the holes between the support plates and between the support plates and the baffles are not concentric; at the same time, the heat exchange tube is stuck and deformed due to the misalignment between the holes. Patent No. CN115870914A discloses a heat exchanger tube threading guide device, including a tail top cone arranged at the front end of the heat exchange tube to be threaded, and also includes a guide portion arranged at the front end of the tail top cone; the guide portion is moved backward by an external force to drive the tail top cone to move backward and clamp the front end of the heat exchange tube. Although the application can clamp the front end of the heat exchange tube through the top cone, the opening angle of the top cone is limited due to the limited diameter of the central axis, resulting in a general clamping effect. There is still a risk of the guide device falling off when inserting the tube. In addition, when the guide device is directly pulled out from the heat exchange tube, the cone clamp is always in contact with the inner wall of the heat exchange tube, resulting in hard friction, which is not convenient for operation and is easy to cause wear on the inner wall of the heat exchange tube, affecting the later use of the heat exchange tube. Therefore, a heat exchanger tube insertion guide device is needed to solve the above technical problems. Utility Model Content

[0003] In view of the above-mentioned defects existing in the prior art, the utility model provides a heat exchanger tube threading guide device, comprising a guide tube matched with the heat exchange tube, the head of the guide tube is conical, the tail is cylindrical, the outer diameter of the tail of the guide tube is not larger than the outer diameter of the heat exchange tube, ensuring that the guide tube can pass through the heat exchange tube hole on the baffle matched with the heat exchange tube, the tail of the guide tube is fixedly connected with a connecting tube, the outer diameter of the connecting tube is smaller than the outer diameter of the tail of the guide tube and the inner diameter of the heat exchange tube, and a locking assembly is arranged in the connecting tube; when in use, the connecting tube is extended into one end of the heat exchange tube, and the heat exchange tube and the connecting tube are locked by the locking member to prevent the guide tube from falling off from the heat exchange tube during the tube threading process;

[0004] The locking assembly includes two blocks, which are symmetrical about the central axis of the connecting tube, a compression spring is connected between the two blocks, and the two blocks are respectively fixedly connected to a connecting arm, one end of the two connecting arms is hinged by a hinge shaft, and the hinge shaft is connected to a pull rod, one end of the pull rod penetrates the connecting tube and extends into the guide tube and is connected to an adjusting member, and the pull rod is controlled to move in the connecting tube and the guide tube by the adjusting member. When the pull rod is adjusted to move toward the connecting tube by the adjusting member, the pull rod pushes the block out of the connecting tube, and under the action of the compression spring, the distance between the two blocks becomes larger, and they are respectively pressed on the inner wall of the heat exchange tube. Under the action of the friction force, the angle range of the block is large, ensuring that the connecting tube will not fall out of the heat exchange tube; when the connecting tube needs to be taken out of the heat exchange tube, the pull rod is adjusted to move toward the guide tube by the adjusting member, and the pull rod pulls the block into the connecting tube, the compression spring is compressed, the distance between the two blocks becomes smaller, and they do not contact the inner wall of the heat exchange tube, and the connecting tube can be directly taken out.

[0005] Preferably, the adjusting member comprises a bolt, one end of which is fixedly connected with a knob, the outer diameter of which is larger than the inner diameter of the guide tube head and smaller than the outer diameter of the guide tube head, the other end of which extends into the guide tube head and is threadedly matched with the guide tube, and the pull rod is rotatably connected to the bolt extending into the guide tube via a bearing. The bolt can be driven to reciprocate along the guide tube by rotating the knob, and the bolt drives the pull rod to move together during the movement, so that the pull rod pushes and pulls the block, and the block can be kept stationary at a certain position, thereby ensuring the fixing effect of the block on the heat exchange tube and the connecting tube.

[0006] Preferably, the block includes a horizontal portion and an inclined portion, the horizontal portion is always located in the connecting tube, one end of the inclined portion is fixedly connected to the horizontal portion, the other end of the inclined portion extends out of the connecting tube and toward the outer wall of the connecting tube, and an elastic anti-skid layer is fixed to the end of the inclined portion. The inclined portion is provided to facilitate the pull rod to pull the two blocks into the connecting tube, and the elastic anti-skid layer can increase the friction between the block and the inner wall of the heat exchange tube, thereby ensuring the fixing effect and avoiding damage to the inner wall of the heat exchange tube.

[0007] Preferably, the compression spring is connected to the horizontal portion of the block.

[0008] Preferably, a guide head is fixedly connected to the side of the knob away from the guide tube, thereby further improving the guiding performance.

[0009] The utility model also includes other components that enable a heat exchanger pipe threading guide device to be used normally, which are all conventional technical means in the field. In addition, the devices or components not limited in the utility model, such as compression springs, bolts, hinge shafts, etc., all adopt conventional technical means and conventional equipment in the field.

[0010] Working principle: The guide tube and the heat exchange tube are tightly connected through the connecting tube and the block. The guide tube guides the heat exchange tube to pass through the holes on each baffle of the heat exchanger in sequence. During operation, the bolt can be driven to move back and forth along the guide tube by turning the knob. The bolt drives the pull rod to move together during the movement, so that the pull rod pushes and pulls the block, and the pull rod moves in the connecting tube and the guide tube. When the pull rod moves toward the connecting tube, the pull rod pushes the block out of the connecting tube. Under the action of the compression spring, the distance between the two blocks increases, and they are pressed on the inner wall of the heat exchange tube respectively. Under the action of friction, it is ensured that the connecting tube will not fall out of the heat exchange tube; when the connecting tube needs to be taken out of the heat exchange tube, the pull rod moves toward the guide tube, the pull rod pulls the block into the connecting tube, the compression spring is compressed, the distance between the two blocks becomes smaller, and they do not contact the inner wall of the heat exchange tube, and the connecting tube can be directly taken out.

[0011] The beneficial effects of the utility model are as follows: the structure is simple and reasonable, and the connection and disassembly between the guide tube and the heat exchange tube are convenient. The opening angle range of the clamping block is large, which improves the reliability of the connection with the heat exchange tube, avoids the falling off of the guide tube during the tube threading process, and improves the tube threading efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 This is a structural schematic diagram of a heat exchanger pipe threading guide device in an embodiment of the utility model;

[0014] Figure 2 for Figure 1 A cross-sectional view of

[0015] Figure 3 for Figure 2 The state diagram of the two blocks entering the connecting pipe.

[0016] In the figure: 1. guide tube; 2. connecting tube; 3. block; 4. elastic anti-skid layer; 5. heat exchange tube; 6. guide head; 7. knob; 8. bolt; 9. pull rod; 10. connecting arm; 11. compression spring; 12. hinge shaft. DETAILED DESCRIPTION

[0017] The present invention is described in detail below in conjunction with the drawings and specific embodiments in the embodiments of the present invention. The description here is only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work, any modifications, equivalent replacements, improvements, etc., should be included in the protection scope of the present invention.

[0018] Example

[0019] like Figure 1-3 As shown, the utility model provides a heat exchanger tube threading guide device, comprising a guide tube 1 matched with the heat exchange tube 5, the head of the guide tube 1 is conical, the tail is cylindrical, the outer diameter of the tail of the guide tube 1 is not larger than the outer diameter of the heat exchange tube 5, ensuring that the guide tube 1 can pass through the hole of the heat exchange tube 5 on the baffle matched with the heat exchange tube 5, the tail of the guide tube 1 is fixedly connected with a connecting tube 2, the outer diameter of the connecting tube 2 is smaller than the outer diameter of the tail of the guide tube 1 and the inner diameter of the heat exchange tube 5, and a locking component is provided in the connecting tube 2; when in use, the connecting tube 2 is extended into one end of the heat exchange tube 5, and the heat exchange tube 5 is locked with the connecting tube 2 by the locking member, so as to prevent the guide tube 1 from falling off from the heat exchange tube 5 during the tube threading process;

[0020] The locking assembly includes two blocks 3, which are symmetrical about the central axis of the connecting tube 2. A compression spring 11 is connected between the two blocks 3. The two blocks 3 are respectively fixedly connected with connecting arms 10. One end of the two connecting arms 10 is hinged by a hinge shaft 12. The hinge shaft 12 is connected with a pull rod 9. One end of the pull rod 9 passes through the connecting tube 2 and then extends into the guide tube 1 and is connected with an adjusting member. The pull rod 9 is controlled to move in the connecting tube 2 and the guide tube 1 through the adjusting member. When the pull rod 9 is adjusted by the adjusting piece to move toward the connecting tube 2, the pull rod 9 pushes the block 3 out of the connecting tube 2. Under the action of the compression spring 11, the distance between the two blocks 3 becomes larger and they are respectively pressed on the inner wall of the heat exchange tube 5. The opening angle range of the blocks is large. Under the action of the friction force, it is ensured that the connecting tube 2 will not fall out of the heat exchange tube 5. When the connecting tube 2 needs to be taken out of the heat exchange tube 5, the pull rod 9 is adjusted by the adjusting piece to move toward the guide tube 1. The pull rod 9 pulls the block 3 into the connecting tube 2, the compression spring 11 is compressed, the distance between the two blocks 3 becomes smaller, and they do not contact the inner wall of the heat exchange tube 5, so the connecting tube 2 can be directly taken out.

[0021] The adjusting member includes a bolt 8, one end of which is fixedly connected to a knob 7, the outer diameter of which is larger than the inner diameter of the head of the guide tube 1 and smaller than the outer diameter of the head of the guide tube 1, the other end of which extends into the head of the guide tube 1 and is threadedly matched with the guide tube 1, and the pull rod 9 is rotatably connected to the bolt 8 extending into the guide tube 1 through a bearing. The bolt 8 can be driven to reciprocate along the guide tube 1 by rotating the knob 7, and the bolt 8 drives the pull rod 9 to move together during the movement, so that the pull rod 9 pushes and pulls the block 3, and the block 3 can be kept stationary at a certain position, ensuring the fixing effect of the block 3 on the heat exchange tube 5 and the connecting tube 2.

[0022] The block 3 includes a horizontal portion and an inclined portion, the horizontal portion is always located in the connecting tube 2, one end of the inclined portion is fixedly connected to the horizontal portion, the other end of the inclined portion extends out of the connecting tube 2 and extends toward the outer wall of the connecting tube 2, and an elastic anti-skid layer 4 is fixed to the end of the inclined portion. The setting of the inclined portion facilitates the pull rod 9 to pull the two blocks 3 to move into the connecting tube 2, and the setting of the elastic anti-skid layer 4 can increase the friction between the block 3 and the inner wall of the heat exchange tube 5, ensure the fixing effect, and avoid damaging the inner wall of the heat exchange tube 5.

[0023] The compression spring 11 is connected to the horizontal portion of the clamping block 3 .

[0024] The side of the knob 7 away from the guide tube 1 is fixedly connected with a guide head 6, which further improves the guiding performance.

[0025] The guide tube 1 and the heat exchange tube 5 are tightly connected through the connecting tube 2 and the block 3. The guide tube 1 guides the heat exchange tube 5 to pass through the holes on the baffles of the heat exchanger in sequence. During operation, the bolt 8 can be driven to move back and forth along the guide tube 1 by turning the knob 7. During the movement, the bolt 8 drives the pull rod 9 to move together, so that the pull rod 9 has a pushing and pulling effect on the block 3, so that the pull rod 9 moves in the connecting tube 2 and the guide tube 1. When the pull rod 9 moves toward the connecting tube 2, the pull rod 9 pushes the block 3 out of the connecting tube 2. Under the action of the compression spring 11, the distance between the two blocks 3 becomes larger and they are respectively pressed on the inner wall of the heat exchange tube 5. Under the action of friction, it is ensured that the connecting tube 2 will not fall out of the heat exchange tube 5. When the connecting tube 2 needs to be taken out of the heat exchange tube 5, the pull rod 9 moves toward the guide tube 1, and the pull rod 9 pulls the block 3 into the connecting tube 2. The compression spring 11 is compressed, and the distance between the two blocks 3 becomes smaller. The blocks do not contact the inner wall of the heat exchange tube 5, and the connecting tube 2 can be directly taken out.

[0026] The embodiments of the present invention 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. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A heat exchanger tube threading guide device, comprising a guide tube matched with a heat exchange tube, the head of the guide tube is conical, the tail is cylindrical, the outer diameter of the tail of the guide tube is not greater than the outer diameter of the heat exchange tube, characterized in that: The tail of the guide tube is fixedly connected with a connecting tube, the outer diameter of the connecting tube is smaller than the outer diameter of the tail of the guide tube and the inner diameter of the heat exchange tube, and a locking assembly is provided inside the connecting tube; The locking assembly includes two blocks, which are symmetrical about the central axis of the connecting tube. A compression spring is connected between the two blocks. The two blocks are respectively fixedly connected with connecting arms. One end of the two connecting arms is hinged through a hinge shaft. The hinge shaft is connected with a pull rod. One end of the pull rod passes through the connecting tube and then extends into the guide tube and is connected with an adjusting part. The pull rod is controlled to move in the connecting tube and the guide tube through the adjusting part.

2. A heat exchanger pipe threading guide device according to claim 1, characterized in that: The adjusting member includes a bolt, one end of which is fixedly connected to a knob, the outer diameter of the knob is larger than the inner diameter of the guide tube head and smaller than the outer diameter of the guide tube head, the other end of the bolt extends into the guide tube head and cooperates with the guide tube thread, and the pull rod is rotatably connected to the bolt extending into the guide tube through a bearing.

3. A heat exchanger pipe threading guide device according to claim 2, characterized in that: The block includes a horizontal portion and an inclined portion, the horizontal portion is always located in the connecting tube, one end of the inclined portion is fixedly connected to the horizontal portion, the other end of the inclined portion extends out of the connecting tube and toward the outer wall of the connecting tube, and an elastic anti-slip layer is fixed to the end of the inclined portion.

4. A heat exchanger pipe threading guide device according to claim 3, characterized in that: The compression spring is connected to the horizontal portion of the clamping block.

5. A heat exchanger pipe threading guide device according to claim 2, characterized in that: The side of the knob away from the guide tube is fixedly connected with a guide head.

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