Positioning tool for mounting flange sealing gasket

Abstract

The utility model relates to a positioning tool for installing a flange sealing gasket, which comprises a support, a limiting mechanism is arranged on the support, the limiting mechanism comprises two limiting rods and a limiting seat, the two limiting rods are connected with the support in a sliding mode and can be positioned on the support, and the limiting seat extends upwards from the top of the support. The limiting rods are parallel to the center line of the limiting base and symmetrically arranged on the two sides of the limiting base, the top of each limiting rod can abut against the peripheral face of the lower portion of the sealing gasket, and the top of the limiting base is further provided with two magnetic cylinders symmetrically distributed about the center line of the limiting base. And each magnetic cylinder can be tangent to the outer peripheral surface of the flange and adsorbed on the outer peripheral surface of the flange. The magnetic cylinder, the limiting rod and the limiting seat are arranged and matched with one another, so that the sealing gasket can be quickly and conveniently positioned on the flange, the support and the limiting mechanism are positioned on the flange by the aid of the magnetic cylinder without manual support, and time and labor are saved during operation.

Description

Technical Field

[0001] This utility model relates to the technical field of workpiece positioning tools, specifically to a positioning tool for installing flange gaskets. Background Technology

[0002] Flange gaskets are typically placed between the two flange faces of a pipeline. Their main function is to fill the gap between the two flanged components, thereby ensuring a seal between the two flange faces. During actual installation or maintenance, the center hole of the gasket is difficult to align with the center axis of the flange face. The main reasons are: first, the flange face is relatively smooth, making the gasket prone to falling off; second, the diameter of the gasket is smaller than the diameter of the flange face, causing the gasket to easily shift out of position. Once the gasket shifts out of position, it will affect the flow rate of the pipeline and cause local pressure instability; furthermore, it will affect the seal between the two flange faces, leading to fluid leakage in the pipeline. Therefore, positioning tools are needed to center the flange gasket during installation.

[0003] For example, Chinese utility model patent ZL201721298865.6 (publication number CN207807490U45), entitled "A Flange Gasket Positioning Fixture," discloses such a positioning fixture. This fixture includes a support with three circumferentially spaced claws. Each claw has a measuring structure for measuring the dimension between the outer circumferential surface of the flange gasket and the outer circumferential surface of the mating flange. The measuring structure has scale values ​​on the claw shaft. By reading the specific values ​​on the measuring structure, the difference between the specific position of the flange gasket and the center position of the flange is obtained. The position of the flange gasket is then adjusted by adjusting the support. However, the operator needs to adjust the position of the flange gasket multiple times to achieve centering. Furthermore, when reading the measuring structure, the flange may be in a high position, introducing some error and affecting the accuracy of the gasket positioning. Meanwhile, since the top claw is composed of multiple connecting rods and the bracket needs to be supported by manpower, multiple people need to work together to install the flange gasket, which is time-consuming and labor-intensive.

[0004] Therefore, further improvements are needed to the structure of the positioning tool for the flange gasket. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a positioning tool for installing flange gaskets that is time-saving and labor-saving in light of the above-mentioned existing technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: The positioning tool for installing flange gaskets includes a bracket, and a limiting mechanism is provided on the bracket. The limiting mechanism includes two limiting rods that are slidably connected to the bracket and can be positioned on the bracket, and a limiting seat extending upward from the top of the bracket. Each limiting rod is parallel to the center line of the limiting seat and symmetrically arranged on both sides of the limiting seat. The top of each limiting rod can abut against the lower outer peripheral surface of the gasket. The top of the limiting seat is also provided with two magnetic cylinders symmetrically distributed along the center line of the limiting seat. Each magnetic cylinder can be tangent to the outer peripheral surface of the flange and adsorbed onto the outer peripheral surface of the flange.

[0007] For ease of adjustment, preferably, the bracket includes a horizontally extending crossbar and a longitudinally extending vertical bar from the bottom of the crossbar. The two limiting rods consist of a first limiting rod sleeved on one end of the crossbar and a second limiting rod symmetrically sleeved on the other end of the crossbar along the centerline of a limiting seat. The centerline of the limiting seat coincides with the centerline of the longitudinal bar, and an adjusting element is provided on the longitudinal bar to adjust the synchronous sliding of the first and second limiting rods. The first and second limiting rods are symmetrically sleeved on both sides of the crossbar. Depending on the diameter of the gasket to be installed, the operator can manipulate the adjusting element to move the first and second limiting rods to a designated position in opposite directions to meet the installation requirements of different gaskets.

[0008] To facilitate the synchronous movement of the limiting rods, preferably, the adjusting component includes a mounting portion slidably sleeved on the longitudinal rod and a first and second inclined rod symmetrically distributed on both sides of the mounting portion. The lower end of the first inclined rod is hinged to one side of the mounting portion, and the upper end of the first inclined rod is hinged to the first limiting rod. The lower end of the second inclined rod is hinged to the other side of the mounting portion, and the upper end of the second inclined rod is hinged to the second limiting rod. The bottom ends of the first and second limiting rods are respectively hinged to the top ends of the corresponding first and second inclined rods, and the bottom ends of the first and second inclined rods are hinged to the mounting portion. When the mounting portion moves up and down along the longitudinal rod, the first and second inclined rods can drive the corresponding first and second limiting rods to move equidistantly around the center line of the limiting seat, thereby ensuring that the center lines of the sealing gasket and the flange coincide after installation.

[0009] To limit the movement of the adjusted limiting rod, preferably, the vertical rod is provided with a first limiting member located above the top of the mounting part to limit its upward movement, and a second limiting member located below the bottom of the mounting part to limit its downward movement. When the first and second limiting rods are adjusted to the appropriate positions, the mounting part needs to be limited and fixed. The first limiting member at the top and the second limiting member at the bottom prevent upward or downward movement. When the first and second limiting rods need to be adjusted, the first and second limiting members are released, and the mounting part can be moved up or down.

[0010] For ease of operation, preferably, the limiting seat is equipped with a switch that can activate or deactivate the magnetism on the two magnetic cylinders. When the positioning tool is in operation, the operator can manually activate the switch to make the magnetic cylinders magnetic; when the positioning tool is not in operation, the operator can manually deactivate the switch to prevent the magnetic cylinders from attracting other ferrous components and causing accidents.

[0011] To avoid interference, preferably, the thickness of the upper ends of the first and second limiting rods is less than the thickness of the flange gasket. After the gasket is positioned on the flange, another flange needs to be aligned and fixed to it. Setting the thickness of the upper ends of the first and second limiting rods to be less than the thickness of the gasket facilitates the fixing of the two flanges. The slightly thicker lower ends of the first and second limiting rods compared to the upper ends are mainly to ensure overall support strength.

[0012] To facilitate the positioning of the gasket, preferably, both limiting rods are provided with positioning parts that can rotate and be positioned relative to each other. Each positioning part can abut against the outer circumferential surface of the flange, and in the abutting state, it is parallel to the tangent at the abutting part of the corresponding limiting rod top. Depending on the flange and gasket diameter, the operator can calculate the corresponding installation data before installation, and then adjust the tangent point between the second limiting part and the outer circumference of the flange by rotating it. With the cooperation of the positioning part, the first limiting rod, and the second limiting rod, the gasket can be installed to the center position of the flange.

[0013] For ease of fixation, preferably, both limiting rods are equipped with bolts, and the positioning part is fitted onto the corresponding bolts and locked in place with fasteners threaded to the bolts to achieve the positioning. Depending on the flange and gasket diameter, the operator can adjust the angle of the positioning part by rotating it around the bolts, and then tighten the fasteners to achieve fixation.

[0014] To achieve precise adjustment, preferably, the crossbar is equipped with a measuring structure that displays the positions of the first and second limit rods. This measuring structure can be a scale value or other markings on the crossbar. After calculating the installation dimensions based on the diameters of the flange and gasket, the operator can prepare the measuring structure on the crossbar in advance so that the first and second limit rods can be quickly adjusted to the designated positions during installation.

[0015] Compared with the prior art, since the limiting seat of this utility model is provided with two magnetic cylinders symmetrically distributed around the center line of the limiting seat and able to abut against the outer circumferential surface of the flange, when the sealing gasket needs to be installed, the distance between the two limiting rods and the limiting seat can be adjusted and fixed on the ground in advance according to the size of the sealing gasket and the flange to ensure that the sealing gasket is in the correct position on the flange end face. Then, the positioning tool is lifted so that the two magnetic cylinders are attracted to the outer circumferential surface of the flange to be installed. At this time, the center of the flange must be on the center line of the limiting seat. Since the two limiting rods are symmetrically distributed on the limiting seat, the sealing gasket can be correctly positioned by placing it on the two limiting rods from top to bottom.

[0016] Especially after adding a positioning part to the limit rod, the positioning tool can be lifted directly, allowing the two magnetic cylinders to adhere to the outer circumferential surface of the flange. Then, each limit rod is moved until the corresponding positioning part abuts against the outer circumferential surface of the flange and is positioned. Then, the sealing gasket can be placed on the two limit rods from top to bottom.

[0017] Therefore, this utility model uses a magnetic cylinder to position the entire bracket and limiting mechanism on the flange without the need for manual support. At the same time, it uses two limiting rods to support the sealing gasket, so that the sealing gasket can be quickly and easily positioned correctly relative to the end face of the flange. Thus, this structure is time-saving and labor-saving to operate and can better meet the installation needs of flange sealing gaskets on site. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model;

[0019] Figure 2 This is a front view of Embodiment 1 of the present invention;

[0020] Figure 3 This is a rear view of Embodiment 1 of the present utility model;

[0021] Figure 4 This is a longitudinal perspective sectional view of Embodiment 1 of the present invention;

[0022] Figure 5 This is a front view of Embodiment 2 of this utility model.

[0023] In the diagram: 1. Bracket; 11. Horizontal bar; 12. Vertical bar; 2. Limiting mechanism; 21. Limiting rod; 211. First limiting rod; 212. Second limiting rod; 22. Limiting seat; 221. Magnetic cylinder; 3. Adjusting component; 31. Mounting part; 32. First diagonal bar; 33. Second diagonal bar; 4. First limiting component; 5. Second limiting component; 6. Switch; 7. Positioning part; 8. Bolt; 9. Fastener; A. Flange; B. Sealing gasket. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] Example 1:

[0026] like Figures 1 to 4 The diagram shows the preferred embodiment of this utility model. The positioning tool for installing a flange gasket includes a bracket 1 and a limiting mechanism 2 mounted on the bracket 1. The limiting mechanism 2 includes two limiting rods 21 slidably connected to the bracket 1 and positioned on the bracket 1, and a limiting seat 22 extending upward from the top of the bracket 1. Each limiting rod 21 is parallel to the center line of the limiting seat 22 and symmetrically arranged on both sides of the limiting seat 22. The top of each limiting rod 21 can abut against the lower outer circumferential surface of the gasket B. The top of the limiting seat 22 is also provided with two magnetic cylinders 221 symmetrically distributed along the center line of the limiting seat 22. Each magnetic cylinder 221 can be tangential to the outer circumferential surface of the flange A and adsorb and abut against the outer circumferential surface of the flange A.

[0027] refer to Figures 1 to 3 The bracket 1 includes a horizontally extending crossbar 11 and a longitudinally extending vertical bar 12 extending downward from the bottom of the crossbar 11. Two limiting rods 21 consist of a first limiting rod 211 sleeved on one end of the crossbar 11 and a second limiting rod 212 symmetrically sleeved on the other end of the crossbar 11 along the centerline of a limiting seat 22. The centerline of the limiting seat 22 coincides with the centerline of the longitudinal bar 12. An adjusting element 3 is provided on the longitudinal bar 12 to adjust the synchronous sliding of the first limiting rod 211 and the second limiting rod 212. Depending on the diameter of the sealing gasket B to be installed, the operator can manipulate the adjusting element 3 to move the first limiting rod 211 and the second limiting rod 212 to a designated position in opposite directions to meet the installation requirements of different sealing gaskets B.

[0028] Since the gasket B needs to be installed on flange A and both need to remain concentric, the first limiting rod 211 and the second limiting rod 212 need to move symmetrically and synchronously on the crossbar 11 to ensure that the center lines of the gasket B and flange A coincide. (Refer to...) Figure 2 and Figure 3In this embodiment, the adjusting component 3 includes a mounting part 31 that is slidably sleeved on the longitudinal rod 12 and a first inclined rod 32 and a second inclined rod 33 symmetrically distributed on both sides of the mounting part 31. The lower end of the first inclined rod 32 is hinged to the left side of the mounting part 31, and the upper end of the first inclined rod 32 is hinged to the first limiting rod 211. The lower end of the second inclined rod 33 is hinged to the right side of the mounting part 31, and the upper end of the second inclined rod 33 is hinged to the second limiting rod 212. When the mounting part 31 moves up and down along the longitudinal rod 12, the first inclined rod 32 and the second inclined rod 33 can drive the corresponding first limiting rod 211 and the second limiting rod 212 to move equidistantly with the center line of the limiting seat 22 as a reference, thereby ensuring that the center lines of the sealing gasket B coincide after the flange A is installed.

[0029] refer to Figure 3 and Figure 4 The longitudinal rod 12 is provided with a first limiting member 4 located above the top of the mounting part 31 to restrict its upward movement, and a second limiting member 5 located below the bottom of the mounting part 31 to restrict its downward movement. When the first limiting rod 211 and the second limiting rod 212 are adjusted to the appropriate position, the mounting part 31 needs to be limited and fixed. By setting the first limiting member 4 at the top and the second limiting member 5 at the bottom, it can be prevented from moving upward or downward. When the first limiting rod 211 and the second limiting rod 212 need to be adjusted, the first limiting member 4 and the second limiting member 5 can be loosened and the mounting part 31 can be moved up and down. The first limiting member 4 and the second limiting member 5 are preferably nuts threaded onto the longitudinal rod 12. Of course, radial pins or retaining rings can also be used. For flanges A and gaskets B of different specifications, corresponding radial holes or grooves can be pre-drilled on the longitudinal rod 12. The radial pin is inserted into the radial hole or the retaining ring is locked in the groove, which can achieve the same upper and lower limit of the mounting part 31.

[0030] The two magnetic cylinders 221 on the limiting seat 22 can be attracted to the outer circumferential surface of the flange A, thereby allowing the entire bracket 1 and the limiting mechanism 2 to be positioned on the flange A without the need for manual support. (See reference) Figure 3 and Figure 4 In this embodiment, a switching switch 6 is provided on the limiting seat 22 to activate or deactivate the magnetism on the two magnetic cylinders 221. When the positioning tool is in working condition, the operator can manually activate the switching switch 6 to make the magnetic cylinders 221 magnetic; when the positioning tool is not in working condition, the operator can manually deactivate the switching switch 6 to prevent the magnetic cylinders 221 from accidentally attracting other parts. The magnetic cylinders 221 can be existing switch-type magnetic seats, with the magnetic seat designed in a cylindrical shape.

[0031] Furthermore, the thickness of the upper ends of the first limiting rod 211 and the second limiting rod 212 is less than the thickness of the sealing gasket B. The main reason is that after the sealing gasket B is positioned on flange A, another flange A needs to be aligned and fixed with the aforementioned flange A. Setting the thickness of the upper ends of the first limiting rod 211 and the second limiting rod 212 to be less than the thickness of the sealing gasket B prevents interference between the two and facilitates the fixing of the two flanges A. (Reference) Figure 1 The upper ends of the first limiting rod 211 and the second limiting rod 212 are made thinner by removing a portion of their thickness. This ensures the support strength of each limiting rod while also preventing interference during installation.

[0032] Finally, the crossbar 11 is equipped with a measuring structure that displays the position of the first limit rod 211 and the second limit rod 212. That is, the crossbar 11 is marked with scales or other markings. After the operator calculates the installation dimensions of the first limit rod 211 and the second limit rod 212 in advance based on the diameter of flange A and sealing gasket B, he or she will mark them on the crossbar 11. By referring to the markings (measuring structure), the first limit rod 211 and the second limit rod 212 can be quickly adjusted to the designated position.

[0033] When needed, the first limiting rod 211 and the second limiting rod 212 can also be made into a telescopic structure, that is, each limiting rod 21 is composed of multiple support rods that are interlocked and positioned by locking components, so that the height of each limiting rod 21 can be adjusted relative to each other when needed.

[0034] The working principle of the positioning tool in this embodiment is as follows: Before installation, the operator calculates the installation dimensions of the limiting rod 21 based on the diameters of the flange A and the sealing gasket B to be installed. The operator loosens the first limiting member 4 and the second limiting member 5 and moves the installation part 31. At this time, the first inclined rod 32 and the second inclined rod 33 drive the first limiting rod 211 and the second limiting rod 212 to move horizontally along the crossbar 11. When the measuring structure shows that the distance between the first limiting rod 211 and the second limiting rod 212 is consistent with the calculated installation data, the operator tightens the first limiting member 4 and the second limiting member 5 to fix the installation part 31. Then, the operator lifts the positioning tool and allows the two magnetic cylinders 221 to adhere to the outer circumference of the flange A to be installed. At this time, the sealing gasket B is placed from top to bottom on the first limiting rod 211 and the second limiting rod 212 to complete the positioning. Finally, the other flange A is brought closer. After the two flanges A are pre-tightened to a certain extent by bolts and nuts, the positioning tool is removed. At this time, the sealing gasket B has been pre-clamped between the two flanges A.

[0035] Example 2:

[0036] The structure of the positioning tool in this embodiment is basically the same as that in the embodiment, the only difference being: (reference) Figure 5The first limiting rod 211 and the second limiting rod 212 are each provided with a positioning part 7 that can rotate and be positioned relative to each other. The positioning part 7 is sleeved on the corresponding bolt 8 and is locked by a fastener 9 that is threaded to the bolt 8 to achieve positioning. In this embodiment, the preferred fastener 9 is a nut that cooperates with the bolt 8. Each positioning part 7 can abut against the outer circumferential surface of the flange A, and when the positioning part 7 is in abutting state with the flange A, it can be parallel to the tangent at the abutting part of the top of the corresponding limiting rod 21. Depending on the flange A and the sealing gasket B of different diameters, the operator can rotate the positioning part 7 around the bolt 8 to adjust the angle. After the adjustment is completed, tightening the nut will achieve fixation.

[0037] The working principle of the positioning tool in this embodiment is as follows: The operator lifts the positioning tool and lets the two magnetic cylinders 221 adhere to the outer peripheral surface of the flange A. At the same time, the operator moves each limiting rod 21 until the corresponding positioning part 7 abuts against the outer peripheral surface of the flange A and is then positioned. Then, the sealing gasket B can be placed on the first limiting rod 211 and the second limiting rod 212 from top to bottom.

Claims

1. A positioning tool for installing flange gaskets, comprising a bracket (1) and a limiting mechanism (2) provided on the bracket (1), characterized in that: The limiting mechanism (2) includes two limiting rods (21) that are slidably connected to the bracket (1) and can be positioned on the bracket (1) and a limiting seat (22) that extends upward from the top of the bracket (1). Each of the limiting rods (21) is parallel to the center line of the limiting seat (22) and is symmetrically arranged on both sides of the limiting seat (22). The top of each of the limiting rods (21) can abut against the lower outer peripheral surface of the sealing gasket (B). The top of the limiting seat (22) is also provided with two magnetic cylinders (221) symmetrically distributed along the center line of the limiting seat (22). Each magnetic cylinder (221) can be tangent to the outer peripheral surface of the flange (A) and adsorbed onto the outer peripheral surface of the flange (A).

2. The positioning tool for installing flange gaskets according to claim 1, characterized in that: The bracket (1) includes a horizontally extending crossbar (11) and a longitudinally extending vertical bar (12) extending downward from the bottom of the crossbar (11). The two limiting rods (21) are composed of a first limiting rod (211) sleeved on one end of the crossbar (11) and a second limiting rod (212) symmetrically sleeved on the other end of the crossbar (11) with the center line of the limiting seat (22). The center line of the limiting seat (22) coincides with the center line of the longitudinal bar (12), and an adjusting member (3) is provided on the longitudinal bar (12) to adjust the first limiting rod (211) and the second limiting rod (212) to slide synchronously.

3. The positioning tool for installing flange gaskets according to claim 2, characterized in that: The adjusting member (3) includes a mounting part (31) that is slidably sleeved on the longitudinal rod (12) and a first inclined rod (32) and a second inclined rod (33) symmetrically distributed on both sides of the mounting part (31). The lower end of the first inclined rod (32) is hinged to one side of the mounting part (31), the upper end of the first inclined rod (32) is hinged to the first limiting rod (211), the lower end of the second inclined rod (33) is hinged to the other side of the mounting part (31), and the upper end of the second inclined rod (33) is hinged to the second limiting rod (212).

4. The positioning tool for installing flange gaskets according to claim 3, characterized in that: The longitudinal bar (12) is provided with a first limiting member (4) located above the top of the mounting part (31) to limit its upward movement and a second limiting member (5) located below the bottom of the mounting part (31) to limit its downward movement.

5. The positioning tool for installing flange gaskets according to claim 1, characterized in that: The limiting seat (22) is provided with a switching switch (6) that can start or stop the magnetism on the two magnetic cylinders (221).

6. The positioning tool for installing flange gaskets according to claim 2, characterized in that: The thickness of the upper ends of the first limiting rod (211) and the second limiting rod (212) is less than the thickness of the sealing gasket (B).

7. The positioning tool for installing flange gaskets according to any one of claims 1 to 6, characterized in that: Both of the limiting rods (21) are provided with positioning parts (7) that can rotate and position relative to each other. Each positioning part (7) can abut against the outer circumferential surface of the flange (A), and in the abutting state of the positioning part (7), it can be parallel to the tangent at the abutting part of the top of the corresponding limiting rod (21).

8. The positioning tool for installing flange gaskets according to claim 7, characterized in that: Both of the limiting rods (21) are provided with bolts (8), and the positioning part (7) is sleeved on the corresponding bolts (8) and locked with fasteners (9) that are threaded to the bolts (8) to achieve the positioning.

9. The positioning tool for installing flange gaskets according to any one of claims 2 to 4, characterized in that: The crossbar (11) is provided with a measuring structure that displays the position of the first limiting rod (211) and the second limiting rod (212).

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