Method for determining the generatrix of positioning devices and container shells

Abstract

This invention relates to the field of positioning tooling technology, and discloses a positioning device and a method for determining the generatrix of a container shell. The calibration rod includes a rod body and a positioning platform disposed at the top of the rod body. An elastic element is sleeved on the outer peripheral wall of the rod body and located between the top surface of the placement platform and the positioning platform. Under external impact, the rod body can drive the positioning platform to move downwards along the height direction, so that the bottom end of the rod body abuts against the part to be positioned and marks the positioning point. At this time, the elastic element is compressed and under impact. Due to its own elastic restoring force, it will return to its state before the impact and drive the positioning platform to move upwards along the height direction. Then, by moving the placement platform along the length direction of the part to be positioned and repeating the above operation, a second positioning point can be obtained. Connecting the two positioning points yields a positioning line. Compared with the positioning lines obtained by the existing string or suspension methods, the positioning accuracy is higher.

Description

Technical Field

[0001] This invention belongs to the field of positioning tooling technology, and specifically relates to a positioning device and a method for determining the generatrix of a container shell. Background Technology

[0002] In heat exchange equipment, heat exchange tubes are often installed inside the container shell, and the relative positional relationship between the tube sheet and the tube support plate inside the container shell needs to be determined. Currently, the center point of these heat exchange tubes and their position relative to the container shell are traditionally determined by pulling or hanging lines, with the reference point selected based on the initial marking of the cylinder section and the use of the hanging line method inside the cylinder.

[0003] Using the above method to determine the reference point is prone to errors due to the roundness accuracy of the shell, which can lead to errors in the parallelism between the positioning lines. This can cause errors in the assembled components and the design requirements, making it difficult to guarantee the orientation of the heat exchange tubes in the container and the relative position of the tube sheet and tube support plate in the heat exchanger. This results in assembly deviations in the orientation of the heat exchange tubes in the container and difficulties in threading the tubes in the heat exchanger, ultimately affecting the quality of the final product. Summary of the Invention

[0004] The purpose of this invention is to provide a method for determining the generatrix of a positioning device and a container shell, thereby solving the technical problem of poor positioning accuracy of positioning lines in the prior art.

[0005] To achieve the above objectives, the present invention provides a positioning device, the positioning device comprising:

[0006] The storage platform has mounting holes on its surface;

[0007] The calibration rod includes a rod body and a positioning platform at the top of the rod body. The bottom end of the rod body passes through a mounting hole and can contact the part to be positioned and be used to position the surface of the part to be positioned.

[0008] An elastic element is fitted onto the outer peripheral wall of the rod body. The elastic element is elastically compressed between the top surface of the placement platform and the positioning table. Under external impact, the rod body can drive the positioning table to move along the height direction to adjust the deformation and compression of the elastic element.

[0009] In an embodiment of the present invention, the positioning device further includes a positioning member for limiting and locking the rod body. A limiting groove is formed on the rod body, and the positioning member passes through the side of the placement platform and is inserted into the limiting groove.

[0010] In an embodiment of the present invention, the limiting groove is an oblong groove that extends along the length of the rod body.

[0011] In an embodiment of the present invention, a punch is integrally connected to the bottom end of the rod body. The punch has a conical structure and the tip of the cone is disposed away from the rod body.

[0012] In an embodiment of the present invention, an impact surface for external driving force is formed on the side of the positioning platform away from the rod body.

[0013] In an embodiment of the present invention, the positioning device further includes two support legs connected to the bottom of the storage platform. The support legs are arranged at intervals along the length of the storage platform, and each support leg extends along the width of the storage platform.

[0014] In an embodiment of the present invention, a weight-reduction notch is provided on the side of the support leg that is away from the storage platform, and the opening of the weight-reduction notch is set towards the side away from the storage platform.

[0015] In an embodiment of the present invention, each support leg has two arc-shaped contact surfaces on the side away from the storage platform, and the two arc-shaped contact surfaces are symmetrically arranged on both sides of the weight reduction notch.

[0016] In an embodiment of the present invention, the top surface of the storage platform is provided with a storage area for placing a level, and the storage area and the mounting hole are respectively located near the two ends of the storage platform along the width direction.

[0017] In an embodiment of the present invention, a method for determining the generatrix of a container shell is proposed, which uses the positioning device described above for determination. The method for determining the generatrix includes the following steps:

[0018] S10: Support the outer peripheral wall of the container shell on the roller bracket;

[0019] S20: Place the positioning device on the outer peripheral wall of the container shell on the side away from the roller bracket;

[0020] S30: Use a level to determine the preset marking position of the positioning device;

[0021] S40: Apply external pressure to the positioning platform of the positioning device so that the bottom end of the rod body contacts the container shell and is calibrated according to the preset marking position.

[0022] Through the above technical solutions, the positioning device and the method for determining the generatrix of the container shell provided by the embodiments of the present invention have the following beneficial effects:

[0023] The positioning device in this embodiment includes a platform, a calibration rod, and an elastic element. The platform has mounting holes on its surface. The calibration rod includes a rod body and a positioning platform at the top of the rod body. The bottom end of the rod body passes through the mounting hole and can contact the part to be positioned. The elastic element is sleeved on the outer peripheral wall of the rod body and located between the top surface of the platform and the positioning platform. Under external impact, the rod body can drive the positioning platform downwards along the height direction, causing the bottom end of the rod body to abut against the part to be positioned and mark the positioning point. At this time, the elastic element is compressed and under impact. Due to its elastic restoring force, it will gradually return to its state before the impact and drive the positioning platform upwards along the height direction. Without external impact, the bottom end of the rod body does not contact the part to be positioned, avoiding affecting the movement of the positioning device. Then, by moving the platform along the length of the part to be positioned and repeating the above operation, a second positioning point can be obtained. Connecting the two positioning points yields a positioning line. Compared to the positioning lines obtained by pulling or hanging lines in the prior art, the positioning lines marked by the positioning device in this embodiment have higher positioning accuracy.

[0024] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. Those skilled in the art can obtain other drawings based on the structures shown in these drawings without any inventive effort. In the drawings:

[0026] Figure 1 This is a schematic diagram of the positioning device according to the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the storage platform according to the present invention;

[0028] Figure 3 This is a schematic diagram of the calibration rod according to the present invention;

[0029] Figure 4 This is a flowchart of the method for determining the generatrix of the container shell according to the present invention.

[0030] Explanation of reference numerals in the attached figures

[0031] 1. Storage platform; 23. Punch head

[0032] 11 Storage Area 3 Elastic Components

[0033] 12 mounting holes 4 positioning elements

[0034] 13 limiting holes; 5 support legs.

[0035] 21 rod body with 6 weight reduction notches

[0036] 211 Limiting groove 7 Arc-shaped contact surface

[0037] 22 Positioning Stages Detailed Implementation

[0038] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0039] The following description, with reference to the accompanying drawings, describes the method for determining the generatrix of the positioning device and the container shell according to the present invention.

[0040] like Figure 1 As shown, in this embodiment, a positioning device is proposed, which includes a platform 1, a calibration rod, and an elastic element 3. The platform 1 has a mounting hole 12 on its surface. The calibration rod includes a rod body 21 and a positioning platform 22 disposed at the top of the rod body 21. The bottom end of the rod body 21 passes through the mounting hole 12 and can contact the part to be positioned. The elastic element 3 is sleeved on the outer peripheral wall of the rod body 21 and located between the top surface of the platform 1 and the positioning platform 22. Under external impact, the rod body 21 can drive the positioning platform 22 to move downwards along the height direction, so that the bottom end of the rod body 21 abuts against the part to be positioned and marks the positioning point. At this time, the elastic element 3 is compressed and under impact. Due to the elastic restoring force of the elastic element 3, it will gradually return to its state before the impact and drive the positioning platform 22 to move upwards along the height direction. Without external impact, the bottom end of the rod body 21 does not contact the part to be positioned, thus avoiding affecting the movement of the positioning device. Then, the platform 1 is moved along the length of the part to be positioned, and the above operation is repeated to obtain a second positioning point. Connecting the two positioning points yields a positioning line. Compared to positioning lines obtained by pulling or hanging lines in existing technologies, the positioning line drawn using the positioning device of this embodiment has higher positioning accuracy. It should be noted that the height direction is... Figure 1 The vertical direction and the length direction are respectively. Figure 1 The left and right directions and the width direction are respectively. Figure 1 The front-to-back direction. The initial elastic compression of elastic element 3 can be adjusted according to actual needs.

[0041] like Figure 3As shown, in this embodiment, the positioning device further includes a positioning element 4 for limiting and locking the rod body 21. A limiting groove 211 is formed on the rod body 21. The limiting groove 211 is an oblong groove extending along the length of the rod body 21. The positioning element 4 passes through the side of the platform 1 and is inserted into the limiting groove 211, thus limiting the movement of the positioning element 4. This prevents the elastic restoring force of the elastic element 3 from ejecting the rod body 21 from the mounting hole 12 during the process of the elastic element 3 being impacted by external force and gradually returning to its pre-impact state, which would affect subsequent positioning point calibration. Specifically, a limiting hole is formed on the side of the platform 1, penetrating the inner wall of the mounting hole 12. The positioning element 4 passes through the limiting hole and is inserted into the limiting groove 211. Further, in this embodiment, the positioning element 4 can be a flat-head screw, threaded into the limiting hole, providing good installation stability. The positioning element 4 can also adopt other structures, as long as they effectively limit the rod body 21.

[0042] like Figure 3 As shown, in this embodiment, a punch 23 is integrally connected to the bottom end of the rod body 21. The punch 23 has a conical structure with the pointed end facing away from the rod body 21. Specifically, the punch 23 can be set as a positive cone, which can further improve the calibration effect of the positioning point. In addition, the rod body 21, the positioning platform 22 and the punch 23 can be set as integrally formed parts, made of high-speed steel, with high structural strength, not easily deformed by external impact, so as to avoid affecting the subsequent positioning point calibration operation.

[0043] like Figure 3 As shown, the positioning platform 22 has an impact surface on the side opposite to the rod body 21, which is used for external driving force. In this embodiment, the impact surface is set to be elliptical, with a large contact area and good stability under external impact. This makes it easy for workers to manually hammer the impact surface to push the positioning platform 22 to move the rod body 21 downward along the height direction for positioning point calibration.

[0044] like Figure 1 As shown, in this embodiment, the positioning device further includes two support legs 5 connected to the bottom of the storage platform 1. These support legs 5 are spaced apart along the length of the storage platform 1, and each support leg 5 extends along the width of the storage platform 1, further increasing the contact area with the object to be positioned. In this embodiment, the support legs 5 serve to support the storage platform 1, enabling it to be stably supported above the object to be positioned.

[0045] like Figure 1As shown, in this embodiment, a weight-reduction notch 6 is provided on the side of the support leg 5 away from the storage platform 1, and the opening of the weight-reduction notch 6 is set towards the side away from the storage platform 1. The weight-reduction notch 6 reduces the overall weight of the positioning device on the one hand, and reduces the contact area between the support leg 5 and the object to be positioned on the other hand, thereby improving the stability of the positioning device.

[0046] like Figure 1 and Figure 2 As shown, in this embodiment, each support leg 5 has two arc-shaped contact surfaces 7 on the side away from the storage platform 1, and the two arc-shaped contact surfaces 7 are symmetrically arranged on both sides of the weight reduction notch 6. Since the container shell is usually cylindrical, the arc-shaped contact surfaces 7 in this embodiment can better adapt to the arc surface of the container shell, effectively reduce the contact points with the container shell, and improve the overall stability of the positioning device.

[0047] like Figure 1 As shown, in this embodiment, the top surface of the platform 1 is provided with a storage area 11 for placing the level. The storage area 11 and the mounting hole 12 are respectively located near the two ends of the platform 1 along the width direction to avoid the placement of the level affecting the positioning point calibration of the positioning rod. Furthermore, a storage groove can be provided in the storage area 11 to facilitate the placement of the level and prevent the level from slipping off the platform 1 when placed on its surface.

[0048] like Figure 4 As shown, in this embodiment, a method for determining the generatrix of a container shell is proposed, which uses the positioning device described above for determination. The generatrix determination method includes the following steps:

[0049] S10: Support the outer peripheral wall of the container shell on the roller bracket;

[0050] S20: Place the positioning device on the outer peripheral wall of the container shell on the side away from the roller bracket;

[0051] S30: Use a level to determine the preset marking position of the positioning device;

[0052] S40: Apply external pressure to the positioning platform 22 of the positioning device so that the bottom end of the rod body 21 contacts the container shell and is calibrated according to the preset marking position.

[0053] In implementing the generatrix determination method in this embodiment, the outer peripheral wall of the container shell is first supported on a roller bracket to restrict the rolling of the container shell. Other devices capable of restricting the movement of the container shell can also be used. Then, the positioning device is placed on the outer peripheral wall at the top of the container shell. Next, a level is placed on the placement area 11. The positioning device is leveled and its position relative to the container shell is adjusted to determine the preset marking position of the positioning device. Finally, actual external pressure is applied to the positioning platform 22, causing the bottom end of the rod body 21 to abut against the calibration member and mark the positioning point. The positioning device is then moved along the axial direction of the container shell to mark another positioning point. Connecting two positioning points yields a positioning line, thus completing the generatrix marking of the positioning device. Compared to the existing string or suspension methods, the positioning accuracy of the positioning line obtained using the generatrix determination method for the container shell in this embodiment is higher.

[0054] Specifically, the following are two operating conditions of the positioning device in this embodiment:

[0055] Application Example 1: Quick selection of the outer peripheral wall generatrix of a container shell:

[0056] The container shell is placed horizontally on the roller bracket, and the positioning device is placed on top of the container shell. A level is placed on the platform 1, and then the level is used to align the device horizontally until it is fully aligned. Then, the rod body 21 is moved downwards along the height direction by striking the positioning platform 22, so that the bottom end of the rod body 21 abuts against the part to be positioned, marking the first positioning point. With the container shell stationary, the positioning device is adjusted along the axial displacement of the container shell, and the process of marking the bottom end of the rod body 21 is repeated to obtain the second positioning point. Connecting the two positioning points yields a generatrix parallel to the central axis of the container shell. It can be seen that the positioning device in this embodiment is simple to operate, accurate, and highly practical, and can easily draw the required generatrix.

[0057] Application Example 2: Determining the relative position of the tube sheet and tube support plate in a heat exchanger:

[0058] Similarly, the container shell is placed horizontally on the roller support. A tube sheet is connected to the inner wall of the container shell, and the tube sheet has multiple insertion holes for inserting heat exchange tubes. Two insertion holes are selected at the same horizontal position. However, due to visual observation errors, a positioning mandrel adapted to the insertion hole is still inserted into each of the two insertion holes, and a level is placed on the two positioning mandrels. This allows the position of the two insertion holes to be adjusted to a horizontal state using the positioning mandrels and the level, that is, the two insertion holes are at the same horizontal height. During this process, the tube sheet will move relative to the container shell. A positioning device is placed on the bottom side of the inner wall of the container shell, near the tube sheet. A level is placed on the platform 1 to level the positioning device, ensuring that the level on the platform 1 is consistent with the level on the positioning mandrel. After verifying that the two levels are consistent, the positioning table 22 is hammered, causing the rod body 21 to move downwards along the height direction and its bottom end to abut against the part to be positioned, marking the first positioning point. With the container shell stationary, the positioning device is adjusted along the axial displacement of the container shell, and the process of marking the bottom end of the rod body 21 is repeated to obtain the second positioning point. Connecting the two positioning points yields a generatrix parallel to the central axis of the container shell. This generatrix is ​​the reference positioning line for the mounting tube support plate. It should be noted that the tube support plates are used to support the heat exchange tubes. Multiple tube support plates are installed on the inner wall of the container shell. Each tube support plate also has multiple insertion holes for the heat exchange tubes to pass through. The tube support plates must be parallel to each other and to the tube sheet to ensure that the heat exchange tubes can be inserted and installed. Furthermore, it is also necessary to ensure that the mounting holes 12 between the multiple tube support plates and between the tube support plates and the tube sheet are on the same axis to avoid the mounting holes 12 interfering with the normal installation of the heat exchange tubes.

[0059] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A positioning device, characterized in that, The positioning device includes: The storage platform (1) has mounting holes (12) on its surface; The calibration rod includes a rod body (21) and a positioning platform (22) disposed at the top of the rod body (21). The bottom end of the rod body (21) passes through the mounting hole (12). The bottom end of the rod body (21) can contact the part to be positioned and is used to position the surface of the part to be positioned. An elastic element (3) is sleeved on the outer peripheral wall of the rod body (21). The elastic element (3) is elastically compressed between the top surface of the placement platform (1) and the positioning table (22). Under the impact of external force, the rod body (21) can drive the positioning table (22) to move along the height direction to adjust the deformation and compression of the elastic element (3).

2. The positioning device according to claim 1, characterized in that, The positioning device also includes a positioning element (4) for limiting and locking the rod body (21). A limiting groove (211) is provided on the rod body (21). The positioning element (4) passes through the side of the placement platform (1) and is inserted into the limiting groove (211).

3. The positioning device according to claim 2, characterized in that, The limiting groove (211) is an oblong groove and extends along the length direction of the rod body (21).

4. The positioning device according to any one of claims 1 to 3, characterized in that, The bottom end of the rod body (21) is also integrally connected to a punch (23), which has a conical structure and the tip of the cone is set away from the rod body (21).

5. The positioning device according to any one of claims 1 to 3, characterized in that, The positioning platform (22) has an impact surface on the side opposite to the rod body (21) for external driving force.

6. The positioning device according to any one of claims 1 to 3, characterized in that, The positioning device also includes two support legs (5) connected to the bottom of the storage platform (1). The support legs (5) are arranged at intervals along the length of the storage platform (1), and each support leg (5) extends along the width of the storage platform (1).

7. The positioning device according to claim 6, characterized in that, The support leg (5) has a weight reduction notch (6) on the side away from the storage platform (1), and the opening of the weight reduction notch (6) is set towards the side away from the storage platform (1).

8. The positioning device according to claim 7, characterized in that, Each of the support legs (5) has two arc-shaped contact surfaces (7) on the side away from the storage platform (1), and the two arc-shaped contact surfaces (7) are symmetrically arranged on both sides of the weight reduction notch (6).

9. The positioning device according to any one of claims 1 to 3, characterized in that, The top surface of the storage platform (1) is provided with a storage area (11) for placing a level. The storage area (11) and the mounting hole (12) are respectively located near the two ends of the storage platform (1) along the width direction.

10. A method for determining the generatrix of a container shell, characterized in that, The determination is performed using the positioning device according to any one of claims 1 to 9, and the generatrix determination method includes the following steps: S10: Support the outer peripheral wall of the container shell on the roller bracket; S20: Place the positioning device on the outer peripheral wall of the container shell on the side opposite to the roller bracket; S30: Use a level to determine the preset marking position of the positioning device; S40: Apply external pressure to the positioning platform (22) of the positioning device so that the bottom end of the rod body contacts the container shell and is calibrated according to the preset marking position.

Images