Fixing device and pipe expanding equipment
By designing a fixing device including a substrate, jaw, annular structural member, elastic deformation member and driving member, the problem of the pipe rotating with the expansion gun during the expansion process is solved, and the stable fixation and safe expansion and connection of the pipe are achieved.
Patent Information
- Application Number
- CN202421527248.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-01
AI Technical Summary
During the expansion and connection between the pipe plate and the pipe, the end of the pipe is prone to rotate with the expansion gun, resulting in excessive torsional stress or damage to the pipe.
A fixing device is designed, including a substrate, a jaw, annular structural member, an elastic deformation member and a driving member. The driving member rotates the annular structure with respect to the substrate, and the claws are pushed towards the tube, and the elastic deformation member causes the claws to grasp the tube, thereby fixing the tube and preventing it from rotating with the expansion gun.
It effectively prevents the end of the pipe from rotating with the expansion gun during the expansion process, reduces torsional stress, avoids damage to the pipe, and achieves a stable expansion process.
Smart Images
Figure CN222856520U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipe expansion, in particular to a fixing device and a pipe expansion device. Background Art
[0002] Tube sheets are widely used in modern industry. Tube sheet equipment refers to inserting a certain number of tubes into the tube sheet. Tube sheet equipment is widely used in heat exchange processing in modern industry, such as boilers, chemical industry and other industries.
[0003] Due to the huge number of tubes, the tubes and tube sheets are expanded or welded together by using automatic expansion or automatic welding equipment. Before welding, the tube sheet expansion process is also required for accurate positioning, so expansion is an important operation to fix the tubes and tube sheets together.
[0004] However, when inserting the tube into the tube sheet, due to the large number of tube sheets and the long length of the tube, in order to ensure that each tube can be inserted into all the tube sheets, the gap between the tube and the tube sheet is set larger. As the cumulative error increases, the gap between the tube and the outermost tube sheet reaches the maximum. During the expansion process, when using an expansion gun, such as a mechanical tube expander, the expansion gun needs to rotate relative to the tube. In this case, it is easy for the end of the tube to rotate with the expansion gun, resulting in excessive torsional stress at the end of the tube relative to the tube body, or the tube completely rotates with the expansion gun, causing damage to the tube. Utility Model Content
[0005] The technical problem to be solved by the utility model is how to prevent the end of the tube from rotating along with the expansion gun during the expansion process of the tube sheet and the tube.
[0006] In order to solve the above problems, the utility model provides a fixing device, which includes:
[0007] A base plate is provided with a first through hole, wherein the first through hole is used to be sleeved outside the tube of the tube plate, and the base plate is arranged at a tube expansion device, and an expansion gun of the tube expansion device is used to be inserted into the tube;
[0008] A plurality of claws are arranged on the substrate around the first through hole;
[0009] A plurality of first structures are arranged on one side of the substrate, each of the clamping claws is arranged on one of the first structures, and the first structures are used to limit the clamping claws to move only along the radial direction of the first through hole;
[0010] An annular structure is sleeved outside the plurality of claws, and the inner annular surface of the annular structure is provided with a plurality of second structures, and the plurality of second structures are arranged in one-to-one correspondence with the plurality of claws;
[0011] A plurality of elastic deformation members are disposed between the plurality of the claws and the base plate in a one-to-one correspondence; and
[0012] A driving member, used to make the annular structure rotate forwardly and reversely relative to the base plate;
[0013] Wherein, when the annular structure rotates relative to the base plate, the second structure is used to push the claw toward the tube.
[0014] Optionally, the driving member is a cylinder piston mechanism.
[0015] The fixing device further comprises a base, the base is connected to the substrate, the base is connected to the tube expansion device, the driving member is hinged to the base, and the driving member is hinged to the annular structure.
[0016] Optionally, the fixing device further comprises a plurality of connecting rods, the connecting rods connecting the base with a head of the tube expansion device, the expansion gun is arranged at the head, the head is used to extend and retract the expansion gun, and the expansion gun is inserted into the first through hole.
[0017] Optionally, the second structure is a recessed structure and is recessed outward from the annular structure, and one side surface of the second structure is an inclined surface.
[0018] One end of the claw is disposed toward the first through hole, and the other end of the claw is disposed in the second structure. The end surface of the other end of the claw is an arc surface, and the end surface of the other end of the claw is in contact with the side surface of the second structure.
[0019] When the annular structure rotates relative to the base plate, a side surface of the second structure is used to push the other end of the claw.
[0020] Optionally, the first structure is a second through hole opened on the plate surface of one side of the substrate, the first structure is a long strip through hole and extends along the radial direction of the first through hole, and the claw is placed in the first structure.
[0021] A push arm is provided at one end of the clamping claw, and the push arm protrudes from the plate surface on one side of the base plate. A plurality of the push arms are used to clamp the tube in the first through hole.
[0022] Optionally, a blocking arm is provided at the other end of the claw, the blocking arm is placed in the first structure, the elastic deformation member is a spring, and two ends of the elastic deformation member are in contact with the blocking arm and the side wall of the first structure respectively.
[0023] Optionally, a recessed structure is provided on the other side of the substrate, the recessed structure is rectangular, and the first structure is placed in the recessed structure.
[0024] Guard eaves are respectively arranged on both sides of the clamping claw, and the guard eaves are placed in the recessed structure. The guard eaves are clamped between the side wall of the recessed structure and the first structure, and the guard eaves are used to prevent the clamping claw from being separated from the first structure.
[0025] Optionally, a circular ring-shaped protrusion structure is provided at the first through hole, one side surface of the push arm protrudes from the end surface of the circular ring-shaped protrusion structure, and the other side surface of the push arm is arranged opposite to the end surface of the circular ring-shaped protrusion structure.
[0026] One end of the claw points to the outer arc surface of the annular protruding structure,
[0027] The tube is inserted into the annular protruding structure.
[0028] Optionally, the end surfaces of the annular protruding structure are respectively provided with a plurality of grooves, and the push arms are placed in the grooves.
[0029] In addition, the utility model also provides a tube expansion device, including the fixing device.
[0030] The technical effects of the utility model at least include:
[0031] When in use, the tube expansion device is operated so that the base plate is close to the end of the tube at the tube plate, and the first through hole is sleeved outside the tube, and the expansion gun can be inserted into the tube. Then, the annular structure is rotated positively relative to the base plate by the driving member, and the second structure pushes the claw toward the tube, and the elastic deformation member is elastically deformed, so that the multiple claws grab the tube. Then, the expansion gun starts to rotate and mechanically expands the tube. Since the multiple claws have already grabbed the tube, the tube will not rotate with the expansion gun during the process of expansion and rotation, thereby preventing the tube end from rotating with the expansion gun.
[0032] After the expansion is completed, the expansion gun stops rotating, and then the driving member rotates the annular structure member in the opposite direction relative to the base plate. During this process, the elastic deformation member rebounds and resets, and the claws are moved away from the first through hole, so that the multiple claws are separated from the contact with the tube, and then the tube expansion device is controlled to separate the expansion gun from the tube and approach the next tube; this reciprocating cycle is repeated to achieve the expansion of multiple tubes on the tube plate.
[0033] In this way, in summary, the base plate, the plurality of claws, the plurality of first structures, the annular structure, the elastic deformation member and the driving member cooperate with each other to prevent the tube from rotating along with the expansion gun during the expansion process. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] Figure 1 A schematic structural diagram of the fixing device according to a specific embodiment of the utility model;
[0035] Figure 2 for Figure 1 The enlarged schematic diagram of P in FIG.
[0036] Figure 3 This is another schematic structural diagram of the fixing device according to a specific embodiment of the present invention. DETAILED DESCRIPTION
[0037] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not intended to limit the utility model. The utility model embodiments can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed below.
[0038] It can be understood that the terms "first", "second", etc. used in the present utility model can be used in this article to describe various professional terms, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. However, unless otherwise specified, these professional terms are not limited by these terms. These terms are only used to distinguish one professional term from another professional term. For example, without departing from the scope of the present utility model, the first receiving device and the second receiving device are different receiving devices, the first surface and the second surface are different surfaces, and the first plane, the second plane, the third plane and the fourth plane are different planes. In the description of the embodiments of the present utility model, the meaning of "multiple" and "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0039] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "setting", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.
[0040] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than the horizontal height of the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than the horizontal height of the second feature.
[0041] It should be noted that when a component is referred to as being "fixed on" or "set on" another component, or similar words such as "fixed on" or "set on", it can be directly on the other component or there can be a central component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a central component at the same time.
[0042] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by technicians in the technical field of the present invention. The terms used in the present invention in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.
[0043] Moreover, the Z-axis in the accompanying drawings represents the vertical direction, that is, the up and down direction, and the positive direction of the Z-axis (that is, the direction of the arrow of the Z-axis) represents the top, and the negative direction of the Z-axis (that is, the direction opposite to the positive direction of the Z-axis) represents the bottom; the X-axis in the accompanying drawings represents the longitudinal direction, that is, the front and back direction. The aforementioned Z-axis and X-axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0044] See also Figures 1 to 3 , this embodiment provides a fixing device, the fixing device comprising:
[0045] The base plate 1 is provided with a first through hole 11, wherein the first through hole 11 is used to be sleeved outside the tube of the tube plate, and the base plate 1 is arranged at a tube expansion device, and an expansion gun of the tube expansion device is used to be inserted into the tube;
[0046] A plurality of claws 2 are arranged on the substrate 1 around the first through hole 11;
[0047] A plurality of first structures 12 are arranged on one side of the substrate 1, each of the claws 2 is arranged on one of the first structures 12, and the first structures 12 are used to limit the claws 2 to move only along the radial direction of the first through hole 11;
[0048] An annular structure 3 is sleeved outside the plurality of claws 2, and a plurality of second structures 31 are arranged on the inner annular surface of the annular structure 3, and the plurality of second structures 31 are arranged in one-to-one correspondence with the plurality of claws 2;
[0049] A plurality of elastic deformation members 4 are disposed between the plurality of the claws 2 and the substrate 1 in a one-to-one correspondence; and
[0050] A driving member 5, used to make the annular structure 3 rotate forward and reverse relative to the base plate 1;
[0051] Wherein, when the annular structure 3 rotates relative to the base plate 1 , the second structure 31 is used to push the claw 2 toward the tube.
[0052] It should be noted that the driving member 5 in this embodiment can be a linear driving member 5, such as an electric push rod, a piston cylinder mechanism, or a rotational driving mechanism, such as a driving motor, a motor, etc., as long as the annular structure 3 can be rotated forward or reversely relative to the substrate 1.
[0053] In addition, the expansion gun in this embodiment may refer to a mechanical tube expander, also known as a deep hole tube expander, or a deep hole adjustable tube expander.
[0054] Of course, as required, the expansion gun may also be a hydraulic tube expander. As long as the tube needs to be fixed during the use of the expansion gun, the fixing device in this embodiment may be used.
[0055] In addition, the tube expansion device may be an automatic expansion robot, which has a mechanical arm connected to the expansion gun and controls the movement of the expansion gun.
[0056] When in use, the tube expansion device is operated so that the base plate 1 is close to the end of the tube at the tube plate, and the first through hole 11 is sleeved outside the tube, and the expansion gun can be inserted into the tube. Then, the annular structure 3 is rotated forward relative to the base plate 1 by the driving member 5, and the second structure 31 pushes the claw 2 toward the tube, and the elastic deformation member 4 is elastically deformed, so that the multiple claws 2 grab the tube. Then, the expansion gun starts to rotate and mechanically expands the tube. Since the multiple claws 2 have already grabbed the tube, the tube will not rotate with the expansion gun during the process of expansion and rotation, thereby preventing the tube end from rotating with the expansion gun.
[0057] After the expansion is completed, the expansion gun stops rotating, and then the driving member 5 rotates the annular structure 3 in the opposite direction relative to the base plate 1. During this process, the elastic deformation member 4 rebounds and resets, and the claws 2 are away from the first through hole 11, so that the multiple claws 2 are out of contact with the tube, and then the tube expansion device is controlled to separate the expansion gun from the tube and approach the next tube; this reciprocating cycle is repeated to achieve the expansion of multiple tubes on the tube plate.
[0058] Thus, in summary, the base plate 1, the plurality of claws 2, the plurality of first structures 12, the annular structure 3, the elastic deformation member 4 and the driving member 5 cooperate with each other to prevent the tube from rotating along with the expansion gun during the expansion process.
[0059] See also Figures 1 to 3 , further, the driving member 5 is a cylinder piston mechanism,
[0060] The fixing device further comprises a base 6 , the base 6 is connected to the substrate 1 , the base 6 is connected to the tube expansion device, the driving member 5 is hinged to the base 6 , and the driving member 5 is hinged to the annular structure 3 .
[0061] By utilizing the rapid response characteristic of the cylinder piston mechanism, the rotational drive is converted into a linear telescopic movement, especially by utilizing the hinge connection between the driving member 5 and the base 6, and the hinge connection between the driving member 5 and the annular structure 3, to ensure that the cylinder piston mechanism will not be stuck during the telescopic process, and to ensure that the annular structure 3 can smoothly perform forward and reverse rotation.
[0062] Preferably, the cylinder piston mechanism is also equipped with a reversing valve, which is respectively connected to the rod chamber and the rodless chamber of the cylinder, and the reversing valve is connected to the air pump.
[0063] See also Figures 1 to 3 Furthermore, the fixing device also includes a plurality of connecting rods, which connect the base 6 with the head of the tube expansion device, and the expansion gun is arranged at the head, and the head is used to extend and retract the expansion gun, and the expansion gun is inserted into the first through hole 11.
[0064] A plurality of connecting rods are used to achieve a stable connection between the fixing device and the machine head.
[0065] Preferably, the tube expansion device comprises a mechanical arm, a machine head and an expansion gun, wherein the machine head is arranged at the end of the mechanical arm, the expansion gun is connected to the machine head, and the machine head is used to drive the expansion gun to expand the tube.
[0066] Preferably, there are two connecting rods, one connecting rod is located above the expansion gun, and the other connecting rod is located below the expansion gun.
[0067] See also Figures 1 to 3Further, the second structure 31 is a recessed structure 13 and is recessed outside the annular structure 3, and one side surface of the second structure 31 is an inclined surface.
[0068] One end of the claw 2 is disposed toward the first through hole 11, and the other end of the claw 2 is disposed in the second structure 31. The end surface of the other end of the claw 2 is an arc surface, and the end surface of the other end of the claw 2 is in contact with the side surface of the second structure 31.
[0069] When the annular structure 3 rotates relative to the base plate 1 , a side surface of the second structure 31 is used to push the other end of the claw 2 .
[0070] By utilizing the plurality of second structures 31 and cooperating with the annular structure 3 to rotate relative to the base plate 1 , the plurality of claws 2 can be synchronously extended and retracted, thereby ensuring that the plurality of claws 2 can synchronously push and withdraw the pipe.
[0071] In addition, the end surface of the other end of the claw 2 is an arc surface, which can reduce the friction resistance when the end surface of the other end of the claw 2 contacts the side surface of the second structure 31, so that the claw 2 can be extended and retracted quickly.
[0072] Preferably, the clamping claw 2 is a long strip-shaped structural member, and the clamping claw 2 extends along the radial direction of the first through hole 11, and the first through hole 11 here is a circular hole.
[0073] See also Figures 1 to 3 Further, the first structure 12 is a second through hole opened on the board surface of one side of the substrate 1, the first structure 12 is a long strip through hole and extends along the radial direction of the first through hole 11, and the claw 2 is placed in the first structure 12,
[0074] A push arm 23 is disposed at one end of the clamping claw 2 . The push arm 23 protrudes from a plate surface on one side of the base plate 1 . A plurality of the push arms 23 are used to clamp the tube in the first through hole 11 .
[0075] The first structure 12 of the long through hole is used to limit the moving direction of the claw 2. At the same time, the push arm 23 protrudes from the plate surface on one side of the base plate 1 to ensure that the push arm 23 on the claw 2 will not be restricted by the first structure 12 and can push the tube, thereby fixing the tube.
[0076] See also Figures 1 to 3 Furthermore, a blocking arm 21 is provided at the other end of the claw 2, and the blocking arm 21 is placed in the first structure 12. The elastic deformation member 4 is a spring, and the two ends of the elastic deformation member 4 are in contact with the blocking arm 21 and the side wall of the first structure 12 respectively.
[0077] Here the spring is in tension and will compress when squeezed.
[0078] See also Figures 1 to 3 Furthermore, a recessed structure 13 is provided on the other side of the substrate 1. The recessed structure 13 is rectangular, and the first structure 12 is placed in the recessed structure 13.
[0079] Guard eaves 22 are respectively provided on both sides of the clamping claw 2. The guard eaves 22 are placed in the recessed structure 13. The guard eaves 22 are stuck between the side wall of the recessed structure 13 and the first structure 12. The guard eaves 22 are used to prevent the clamping claw 2 from detaching from the first structure 12.
[0080] First, the barrier 22 is disposed in the recessed structure 13 and clamped between the side wall of the recessed structure 13 and the first structure 12 to prevent the claw 2 from falling off the base plate 1, thereby facilitating the assembly of the entire fixing device.
[0081] Secondly, the barrier eaves 22 are arranged in the recessed structure 13 to prevent the barrier eaves 22 from protruding from the other side of the base plate 1, so that the other side of the base plate 1 is flat and convenient for docking with other components.
[0082] See also Figures 1 to 3 Further, a circular ring-shaped protruding structure 14 is provided at the first through hole 11, one side surface of the push arm 23 protrudes from the end surface of the circular ring-shaped protruding structure 14, and the other side surface of the push arm 23 is arranged opposite to the end surface of the circular ring-shaped protruding structure 14,
[0083] One end of the claw 2 points to the outer arc surface of the annular protruding structure 14.
[0084] The tube is inserted into the annular raised structure 14 .
[0085] The annular protruding structure 14 is used to limit the radial expansion and contraction range of the clamping claw 2, thereby preventing the clamping force on the pipe from being too large and causing damage to the pipe.
[0086] See also Figures 1 to 3 Furthermore, the end surfaces of the annular protruding structure 14 are respectively provided with a plurality of grooves 15 , and the push arms 23 are placed in the grooves 15 .
[0087] The push arm 23 is placed in the groove 15 to prevent the push arm 23 from being exposed to the outside during the movement of the robot arm, which may cause the push arm 23 to be damaged by scratching against the tubes on the tube sheet.
[0088] This embodiment also provides a tube expansion device, including the fixing device. Since the technical effect achieved by the tube expansion device is the same as that achieved by the fixing device, the tube expansion device will not be further explained.
[0089] Although the disclosure is as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.
Claims
1. A fixing device, characterized in that: The fixing device comprises: A base plate is provided with a first through hole, wherein the first through hole is used to be sleeved outside the tube of the tube plate, and the base plate is arranged at a tube expansion device, and an expansion gun of the tube expansion device is used to be inserted into the tube; A plurality of claws are arranged on the substrate around the first through hole; A plurality of first structures are arranged on one side of the substrate, each of the clamping claws is arranged on one of the first structures, and the first structures are used to limit the clamping claws to move only along the radial direction of the first through hole; An annular structure is sleeved outside the plurality of claws, and the inner annular surface of the annular structure is provided with a plurality of second structures, and the plurality of second structures are arranged in one-to-one correspondence with the plurality of claws; A plurality of elastic deformation members are disposed between the plurality of the claws and the base plate in a one-to-one correspondence; and A driving member, used to make the annular structure rotate forwardly and reversely relative to the base plate; Wherein, when the annular structure rotates relative to the base plate, the second structure is used to push the claw toward the tube.
2. The fixing device according to claim 1, characterized in that: The driving member is a cylinder piston mechanism, The fixing device further comprises a base, the base is connected to the substrate, the base is connected to the tube expansion device, the driving member is hinged to the base, and the driving member is hinged to the annular structure.
3. The fixing device according to claim 2, characterized in that: The fixing device also includes a plurality of connecting rods, which connect the base with the head of the tube expansion device. The expansion gun is arranged at the head, and the head is used to extend and retract the expansion gun. The expansion gun is inserted into the first through hole.
4. The fixing device according to claim 1, characterized in that: The second structure is a concave structure and is concave outward of the annular structure, and one side surface of the second structure is an inclined surface. One end of the claw is disposed toward the first through hole, and the other end of the claw is disposed in the second structure. The end surface of the other end of the claw is an arc surface, and the end surface of the other end of the claw is in contact with the side surface of the second structure. When the annular structure rotates relative to the base plate, a side surface of the second structure is used to push the other end of the claw.
5. The fixing device according to any one of claims 1 to 4, characterized in that: The first structure is a second through hole opened on one side of the substrate. The first structure is a long strip through hole and extends along the radial direction of the first through hole. The claw is placed in the first structure. A push arm is provided at one end of the clamping claw, and the push arm protrudes from the plate surface on one side of the base plate. A plurality of the push arms are used to clamp the tube in the first through hole.
6. The fixing device according to claim 5, characterized in that: A blocking arm is provided at the other end of the claw, and the blocking arm is placed in the first structure. The elastic deformation member is a spring, and two ends of the elastic deformation member are respectively in contact with the blocking arm and the side wall of the first structure.
7. The fixing device according to claim 5, characterized in that: The other side of the substrate is provided with a recessed structure, the recessed structure is rectangular, and the first structure is placed in the recessed structure. Guard eaves are respectively arranged on both sides of the clamping claw, and the guard eaves are placed in the recessed structure. The guard eaves are clamped between the side wall of the recessed structure and the first structure, and the guard eaves are used to prevent the clamping claw from being separated from the first structure.
8. The fixing device according to claim 5, characterized in that: The first through hole is provided with an annular protrusion structure, one side surface of the push arm protrudes from the end surface of the annular protrusion structure, and the other side surface of the push arm is arranged opposite to the end surface of the annular protrusion structure. One end of the claw points to the outer arc surface of the annular protruding structure, The tube is inserted into the annular protruding structure.
9. The fixing device according to claim 8, characterized in that: The end surfaces of the annular protruding structure are respectively provided with a plurality of grooves, and the push arms are placed in the grooves.
10. A tube expansion device, characterized in that: A fixing device comprising any one of claims 1 to 9.