A positioning device for thin-wall stainless steel tube clamp-press connection

Abstract

The application discloses the technical fields of positioning frock and relates to a positioning device for clamping and pressing type connection of thin-wall stainless steel pipes, which comprises a base, a pipeline fixing assembly, a positioning assembly and a joint fixing assembly which are arranged on the base, and two positioning members which are arranged at two ends of a mounting seat of the positioning assembly respectively. The pipeline is fixed by the pipeline fixing assembly, so that the pipeline keeps position fixed during installation, and a stable and reliable reference is provided for subsequent positioning operation. After one positioning member of the positioning assembly contacts with the pipeline fixed on the pipeline fixing assembly to limit the height of the positioning assembly, the other positioning member is used to position the joint, so that the joint and the pipeline are in the same axis, the misplacement problem caused by angle deflection during manual insertion is avoided, the coaxiality requirement of connection is ensured, manual visual inspection or experience judgment is not needed, and random errors caused by manual height adjustment are avoided.

Description

Technical Field

[0001] This invention relates to the field of positioning fixtures, and more specifically to a positioning device for clamping connection of thin-walled stainless steel pipes. Background Technology

[0002] Press-fit connection is a widely used connection method in thin-walled stainless steel pipe systems. Its basic principle is to insert the thin-walled stainless steel pipe into the socket of the press-fit fitting with a sealing ring to a predetermined depth, and then use a special hydraulic tool to apply radial pressure to the outer wall of the fitting, so that the fitting and the pipe undergo plastic deformation simultaneously, forming a mechanical interlock and seal. Currently, construction sites generally use a manual insertion method that relies on visual inspection and touch. After inserting the steel pipe into the fitting, the operator usually judges whether it is in place by observing the relative position of the fitting socket end face and the steel pipe surface, or by feeling the change in resistance during insertion based on experience. Due to the lack of a rigid limit reference, it is difficult for the operator to accurately control the stopping position of the steel pipe, and it is also impossible to ensure that the steel pipe is inserted into the fitting socket in a straight line, which can easily damage the sealing ring structure inside the socket and affect the reliability of the connection. Summary of the Invention

[0003] The purpose of this invention is to provide a positioning device for a press-fit connection of thin-walled stainless steel pipes, which solves the problem of the lack of rigid limiting in existing press-fit connections.

[0004] The present invention achieves the above objectives through the following technical solution: a positioning device for press-fit connection of thin-walled stainless steel pipe, comprising: a base and a pipe fixing component, a positioning component and a joint fixing component disposed on the base; The positioning component includes a mounting base and two positioning elements respectively disposed at both ends of the mounting base. The positioning component is used to limit its own height by having one positioning element contact the pipe fixed on the pipe fixing component, and then to position the joint by the other positioning element so that the joint and the pipe are on the same axis. The joint fixing component is used to fix the joint after it has been positioned by the positioning component.

[0005] Preferably, the base is provided with a slide rail, the slide rail is provided with a movable seat, and the joint fixing assembly is provided on the movable seat.

[0006] Preferably, the joint fixing assembly includes a first lifting member disposed on a movable base, a support disposed on the movable end of the first lifting member, two fixing plates slidably disposed on the support, and a third driving member for driving the two fixing plates closer to or further away from each other.

[0007] Preferably, the positioning component is located on the movable base.

[0008] Preferably, the positioning component further includes a second lifting member, the mounting base is disposed on the moving end of the second lifting member, and the positioning member includes racks that are slidably disposed on the upper and lower side walls of the mounting base, gears disposed on the mounting base and meshing with the two racks, and positioning plates disposed at the ends of the two racks respectively.

[0009] Preferably, the two positioning plates near the joint fixing assembly have pressure blocks rotatably provided on their side walls, and the top wall of the movable seat has an arc-shaped sliding groove, in which the second lifting component is slidably inserted.

[0010] Preferably, the mounting base includes a mounting block and a movable block rotatably mounted on the mounting block, and the two positioning elements are respectively mounted on the movable block and the mounting block.

[0011] Preferably, the pipe fixing assembly includes a lower clamping plate, an upper clamping plate, a first driving member, a screw rod disposed on the output shaft of the first driving member, and a threaded sleeve disposed on the screw rod and connected to the upper clamping plate.

[0012] Preferably, a movable rod is slidably provided on both the upper and lower clamping plates, a stop block is provided at the end of the movable rod, a plurality of toothed blocks are provided on the movable rod, and a limiting block located between the toothed blocks is slidably provided on both the upper and lower clamping plates.

[0013] Preferably, the lower clamping plate is slidably provided with two pressure plates and a second driving member for driving the pressure plates to move; The pressure plate is a telescopic plate.

[0014] The beneficial effects of this invention are as follows: 1. The pipe is fixed in place by the pipe fixing component, which keeps the pipe in a fixed position during installation. This provides a stable and reliable reference for subsequent positioning operations. After one positioning part of the positioning component contacts the pipe fixed to the pipe fixing component to limit its own height, the other positioning part positions the joint to make the joint and the pipe coaxial. This avoids the misalignment problem caused by angular deviation when manually inserted, and ensures the coaxiality requirement of the connection. No manual visual inspection or experience judgment is required, and random errors caused by manual height adjustment are avoided. 2. The connector is fixed by the connector fixing component after the positioning component is positioned, ensuring that the pipe and connector will not be misaligned during the installation process. The mechanical limit and rigid positioning method replaces the insertion positioning method that relies on manual visual inspection and feel, which improves the quality consistency and reliability of the crimp connection and reduces the risk of leakage caused by improper insertion. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the positioning device for the press-fit connection of thin-walled stainless steel pipes according to the present invention; Figure 2 This is a schematic diagram of the pipe fixing assembly structure of the present invention; Figure 3 This is a schematic diagram of the connection structure between the upper and lower clamping plates of the present invention; Figure 4 This is a schematic diagram of the connection structure between the connector fixing component and the positioning component of the present invention.

[0016] In the diagram: 1. Base; 2. Pipe fixing assembly; 201. Upper clamping plate; 202. Lower clamping plate; 203. First driving component; 204. Screw; 3. Moving rod; 4. Stop block; 5. Limiting block; 6. Slide rail; 7. Moving seat; 8. Joint fixing assembly; 801. First lifting component; 802. Support; 803. Fixing plate; 804. Third driving component; 9. Positioning assembly; 901. Second lifting component; 902. Mounting seat; 9021. Movable block; 9022. Mounting block; 903. Rack; 904. Positioning plate; 905. Pressure block; 10. Pressure plate; 11. Second driving component; 12. Slide groove. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content. Example 1

[0018] Please see Figure 1 A positioning device for a thin-walled stainless steel pipe press-fit connection includes: a base 1, and a pipe fixing component 2, a positioning component 9 and a connector fixing component 8 are provided on the top wall of the base 1. Please refer to Figure 4 The positioning component 9 includes a mounting base 902 and two positioning members respectively disposed at both ends of the mounting base 902. The positioning members include two racks 903, a gear, and two positioning plates 904. The two positioning plates 904 are respectively disposed on the ends of the two racks 903. The mounting base 902 has a mounting groove inside. The gear is rotatably disposed in the inner cavity of the mounting groove. The two racks 903 are slidably disposed on the upper and lower side walls of the mounting base 902, and the ends of the racks 903 extend into the inner cavity of the mounting groove. The gear meshes with the two racks 903. When the gear rotates, it moves the two racks 903 synchronously, causing the two positioning plates 904 to move closer to or further away from each other.

[0019] It should be noted that a motor is installed inside the mounting slot, and the output shaft of the motor is connected to the shaft of the gear to drive the gear to rotate actively.

[0020] The specific steps for the press-fit connection of thin-walled stainless steel pipes are as follows: Prepare the press-fit stainless steel pipes and fittings (with sealing rings) to be prefabricated and installed, and clean the inside and surface (remove burrs and cuts from the pipe ends, and wipe away any debris and foreign matter adhering to the inside and outside of the pipe with cotton or gauze); mark the pipe with a marking tool to ensure the correct size for the pipe to be inserted into the fitting; fix the pipe to the pipe fixing assembly 2, and then adjust one of the positioning components 9 so that the two positioning plates 904 of the positioning component are positioned on the upper and lower sides of the pipe, respectively. Then, control the gear to rotate, causing the rack 903 to move and drive the two positioning plates 904 to move closer together until the two positioning plates 904 are in contact with the upper and lower outer walls of the pipe, which is used to position the height of the mounting base 902; then place the end of the fitting between the two positioning plates 904 of the other positioning component, and control... The gear rotates, causing the rack 903 to move and drive the two positioning plates 904 to move closer together until they are in contact with the upper and lower outer walls of the pipe fitting. The fitting is then fixed using the connector fixing assembly 8 after being positioned by the positioning assembly 9, ensuring the fitting and pipe are on the same axis. The connector fixing assembly 8 is moved horizontally to align the pipe with the fitting, with the pipe inserted to the depth of the marked area on the pipe. After this, the crimping jaw groove is placed on the arc-shaped protrusion of the fitting, and the fitting is crimped in place. The ends of both the pipe and fitting simultaneously contract (smaller on the outside, larger on the inside, forming a hexagonal surface), achieving the required connection strength and sealing. After completion, a special gauge is used to check if the crimped dimensions are correct to prevent improper construction. Careful inspection of the crimped dimensions is crucial; if the gauge cannot be inserted into the crimping area, it should be crimped again or cut and re-fabricated. After inspection, the crimped pipe is removed.

[0021] It should be noted that before using the positioning component to position the pipe fitting, the pipe fitting is first placed between the two fixing plates 803. The third driving component 804 is used to drive the two fixing plates 803 to move closer to each other, so that the center line of the pipe fitting and the mounting base 902 are on the same horizontal plane (the fixing plates 803 do not completely fix the pipe fitting). The upper and lower side walls of the two positioning plates 904 that contact the pipe fitting are the uppermost and lowermost parts of the pipe fitting, ensuring accurate positioning of the pipe fitting. The pipe fixing component 2, the positioning component 9 and the joint fixing component 8 are on the same horizontal plane.

[0022] It should also be noted that if the insertion is too tight, you can wet the tube with a little water, but do not use grease for lubrication, as grease may cause the sealing ring to deform and fail.

[0023] In this embodiment, as a further optimization, please refer to... Figure 1The top wall of the base 1 is provided with a slide rail 6, and a movable seat 7 is slidably mounted on the slide rail 6. The connector fixing component 8 is mounted on the movable seat 7. By using the movable seat 7 to slide on the slide rail 6, the connector fixing component 8 can slide towards the pipe fixing component 2, so that the pipe and fitting can be properly connected after being fixed, ensuring that the positioning device can still provide positioning for the pipe and fitting during the connection process.

[0024] It should be noted that a drive device (such as an electric telescopic rod) can also be installed on the base 1 to drive the movable seat 7 to slide on the slide rail 6.

[0025] In this embodiment, as a further optimization, please refer to... Figure 4 The joint fixing assembly 8 includes a first lifting member 801, a support 802 disposed on the moving end of the first lifting member 801, two fixing plates 803 slidably disposed on the top wall of the support 802, and a third driving member 804. The third driving member 804 includes a motor, a lead screw disposed on the output shaft of the motor, and a sliding sleeve sleeved on the lead screw. The motor is mounted on the support 802, and the sliding sleeve is connected to the fixing plates 803. The sliding sleeve and the support 802 are slidably connected. The motor drives the lead screw to rotate, so that the sliding sleeve carries the fixing plates 803, which is used to drive the two fixing plates 803 to move closer or further apart. The first lifting member 801 is an electric telescopic rod, which is disposed on the top wall of the moving seat 7. By extending and retracting the first lifting member 801, the height of the support 802 is adjusted, and the two fixing plates 803 are moved to the front and rear sides of the pipe to be fixed. The third driving member 804 drives the two fixing plates 803 to move closer together, and fixes the pipe from the front and rear.

[0026] In this embodiment, as a further optimization, please refer to... Figure 4 The positioning component 9 also includes a second lifting member 901, which includes a telescopic main rod, a telescopic secondary rod slidably inserted into the telescopic main rod, and bolts provided on the side wall of the telescopic main rod for fixing the telescopic secondary rod. The second lifting member 901 is provided on the top wall of the movable seat 7, and the mounting seat 902 is provided on the moving end of the second lifting member 901. After a positioning member contacts the fixed pipe to position the mounting seat 902, the second lifting member 901 is fixed (so that it cannot extend or retract), and the mounting seat 902 is supported by the second lifting member 901.

[0027] In this embodiment, as a further optimization, please refer to... Figure 1 and Figure 4Two positioning plates 904 near the joint fixing assembly 8 have rotatable pressure blocks 905 on their adjacent side walls. The top wall of the movable seat 7 has a sliding groove 12, which is arc-shaped. The second lifting member 901 is slidably inserted into the sliding groove 12. When the positioning member positions the pipe, the two pressure blocks 905 directly contact the upper and lower side walls of the pipe. After the two fixing plates 803 completely fix the pipe from the front and rear sides, the connection between the positioning member and the pipe is released, and the second lifting member 901 is moved so that it slides along the sliding groove 12, moving the positioning assembly 9 from between the pipe and the pipe to the side of the pipe without affecting the connection between the pipe and the pipe. When the second lifting member 901 slides, moving the mounting seat 902 and the positioning plate 904, the pressure blocks 905 rotate on the positioning plate 904, so that there is no relative displacement between the pressure blocks 905 and the pipe, making it easy to remove the positioning assembly 9 without releasing the restriction of the positioning assembly 9 on the pipe from the top and bottom, thus making the pipe fixed and stable.

[0028] In this embodiment, as a further optimization, please refer to... Figure 4 The mounting base 902 includes a mounting block 9022 and a movable block 9021 rotatably mounted on the end of the mounting block 9022 (the mounting block 9022 is mounted on the moving end of the second lifting member 901, the center of the end of the mounting block 9022 is located at the rotating shaft, and the movable block 9021 is located at the end of the rotating shaft). Two positioning members are respectively provided on the movable block 9021 and the mounting block 9022; Figure 1 and Figure 4 With the direction as the reference, the positioning component on the left side contacts the upper and lower side walls of the pipe through the positioning plate 904. After positioning the height of the mounting base 902, rotate the movable block 9021 to move the positioning plate 904 from the upper and lower to the front and back. Then control the two positioning plates 904 to move closer to each other so that they contact the front and back side walls of the pipe. Check from the front and back whether the center line of the mounting base 902 is the same as the axis of the pipe to increase the accuracy of positioning. Example 2

[0029] As a further optimization of Example 1, please refer to Figure 1 , Figure 2 and Figure 3 The pipe fixing assembly 2 includes a lower clamping plate 202, an upper clamping plate 201, a first driving member 203 (such as a motor), a screw 204 mounted on the output shaft of the first driving member 203, and a threaded sleeve sleeved on the screw 204 and connected to the side wall of the upper clamping plate 201. The first driving member 203 is mounted on the base 1. The first driving member 203 drives the screw 204 to rotate, causing the threaded sleeve to move the upper clamping plate 201 up or down. When the upper clamping plate 201 moves down and closes to the lower clamping plate 202, it is used to fix the pipe. When the upper clamping plate 201 moves up and away from the lower clamping plate 202, it is used to release the fixation of the pipe.

[0030] It should be noted that a guide rod is installed on the base 1, and the guide rod is slidably connected to the screw sleeve, so that the screw sleeve can only move up and down.

[0031] In this embodiment, as a further optimization, please refer to... Figure 1 , Figure 2 and Figure 3 Mounting holes are provided on the side walls of the upper clamping plate 201 and the lower clamping plate 202. A moving rod 3 is slidably inserted into the mounting holes. A stop block 4 is provided at the end of the moving rod 3. Several toothed blocks are provided on the side wall of the moving rod 3. A limiting block 5 is slidably provided on both the upper clamping plate 201 and the lower clamping plate 202. A compression spring is provided between the limiting block 5 and the upper clamping plate 201 and the lower clamping plate 202. The end of the limiting block 5 is located between the toothed blocks to fix the moving rod 3. The two stop blocks 4 are located on the upper and lower sides of the fixed pipe respectively. When the fitting is connected to the pipe, the pipe is inserted into the inner cavity of the fitting. When the stop block 4 is in contact with the end of the fitting, the pipe cannot continue to move into the fitting, which plays a limiting role and is used to control the depth of the pipe insertion into the fitting.

[0032] In this embodiment, as a further optimization, please refer to... Figure 2 and Figure 3 Two pressure plates 10 are slidably mounted on the top wall of the lower clamping plate 202. A second driving component 11 (including a motor, a lead screw mounted on the motor output shaft, and a sliding sleeve mounted on the lead screw; the motor is mounted on the lower clamping plate 202, and the sliding sleeve is connected to the pressure plate 10) is provided on the lower clamping plate 202. The second driving component 11 is used to drive the pressure plates 10 to move, so that the two move closer or further apart. The upper clamping plate 201 and the lower clamping plate 202 fix the pipe from above and below, and the two pressure plates 10 restrict the pipe from the front and back, ensuring the pipe is fixed stably and ensuring accurate positioning later. The pressure plate 10 is a telescopic plate (including two slidably connected plates with a spring between the two plates) to accommodate different pipe fixing methods.

[0033] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A positioning device for press-fit connection of thin-walled stainless steel pipes, characterized in that, include: The base (1) and the pipe fixing assembly (2), positioning assembly (9) and joint fixing assembly (8) provided on the base (1); The positioning component (9) includes a mounting base (902) and two positioning elements respectively located at both ends of the mounting base (902). The positioning component (9) is used to limit its own height by using one positioning element to contact the pipe fixed on the pipe fixing component (2), and then to position the joint by the other positioning element so that the joint and the pipe are on the same axis. The joint fixing component (8) is used to fix the joint after it is positioned by the positioning component (9).

2. The positioning device for press-fit connection of thin-walled stainless steel pipe according to claim 1, characterized in that, The base (1) is provided with a slide rail (6), the slide rail (6) is provided with a movable seat (7), and the connector fixing assembly (8) is provided on the movable seat (7).

3. The positioning device for press-fit connection of thin-walled stainless steel pipe according to claim 2, characterized in that, The joint fixing assembly (8) includes a first lifting member (801) disposed on the movable seat (7), a support (802) disposed on the movable end of the first lifting member (801), two fixing plates (803) slidably disposed on the support (802), and a third driving member (804) for driving the two fixing plates (803) to move closer or further apart from each other.

4. A positioning device for press-fit connection of thin-walled stainless steel pipes according to claim 2, characterized in that, The positioning component (9) is mounted on the movable seat (7).

5. A positioning device for press-fit connection of thin-walled stainless steel pipe according to claim 4, characterized in that, The positioning component (9) further includes a second lifting member (901), and the mounting base (902) is located on the moving end of the second lifting member (901). The positioning member includes racks (903) that are slidably mounted on the upper and lower side walls of the mounting base (902), gears mounted on the mounting base (902) and meshing with the two racks (903), and positioning plates (904) located at the ends of the two racks (903).

6. A positioning device for press-fit connection of thin-walled stainless steel pipe according to claim 5, characterized in that, Two positioning plates (904) near the joint fixing assembly (8) are provided with pressure blocks (905) on their side walls. The top wall of the movable seat (7) is provided with an arc-shaped sliding groove (12). The second lifting member (901) is slidably inserted into the sliding groove (12).

7. A positioning device for press-fit connection of thin-walled stainless steel pipes according to claim 1, characterized in that, The mounting base (902) includes a mounting block (9022) and a movable block (9021) rotatably mounted on the mounting block (9022). The two positioning elements are respectively mounted on the movable block (9021) and the mounting block (9022).

8. A positioning device for press-fit connection of thin-walled stainless steel pipe according to claim 1, characterized in that, The pipe fixing assembly (2) includes a lower clamping plate (202), an upper clamping plate (201), a first driving member (203), a screw (204) provided on the output shaft of the first driving member (203), and a threaded sleeve provided on the screw (204) and connected to the upper clamping plate (201).

9. A positioning device for press-fit connection of thin-walled stainless steel pipe according to claim 8, characterized in that, Both the upper clamping plate (201) and the lower clamping plate (202) are slidably provided with moving rods (3), and the ends of the moving rods (3) are provided with stop blocks (4). The moving rods (3) are provided with a number of toothed blocks, and both the upper clamping plate (201) and the lower clamping plate (202) are slidably provided with limiting blocks (5) located between the toothed blocks.

10. A positioning device for press-fit connection of thin-walled stainless steel pipe according to claim 8, characterized in that, The lower clamping plate (202) is slidably provided with two pressure plates (10) and a second driving member (11) for driving the pressure plates (10) to move. The pressure plate (10) is a telescopic plate.

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