A lens pad mounting tool

Abstract

The utility model discloses a lens pad mounting frock, solved the problem of time -consuming and labor -intensive, low installation efficiency of lens pad type flange connection in the prior art. The utility model discloses including the split design lens pad fixing disc, the arc installation through slot of symmetrical setting is seted up on the lens pad fixing disc, the lens pad locating hole is seted up in the lens pad fixing disc front end surface center, the limit hole is seted up in the lens pad fixing disc rear end surface center, and the arc installation through slot and lens pad locating hole all are linked together with limit hole, the annular positioning boss is equipped in the lens pad locating hole, and the annular positioning boss corresponds with the installation fixed groove seted up on the lens pad. The utility model discloses lens pad fixing disc adopts split design and can hold the stable round lens pad, and the coaxial installation of quick and A end welding screw thread pipe is convenient. The lens pad installation fixed groove and annular positioning boss cooperate together and position, thereby can guarantee the coaxial of lens pad and welding screw thread pipe, improve installation precision, guarantee sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of lens gasket flange connection technology, and in particular to a lens gasket installation fixture. Background Technology

[0002] Lens gasket flange connection is commonly used in high-pressure, large-diameter fluid pipelines. It mainly consists of a line seal formed between the tapered end of the welded threaded pipe and the arc of the lens gasket. This sealing method has advantages such as small sealing contact area, reliable sealing, and reusability.

[0003] In the traditional lens gasket flange connection installation process, due to the large pipe specifications and the high accuracy of lens gasket alignment, one person typically uses a thin white nylon thread tied to the lens gasket mounting groove for manual hoisting and alignment. Other personnel are responsible for aligning the flange and lens gasket before installing the flange fixing bolts and nuts. This method has two main problems: first, using a thin thread to hoist the lens gasket cannot quickly and accurately achieve alignment, resulting in low installation efficiency; second, a dedicated person must constantly hold the thin thread for alignment during hoisting, wasting manpower. In summary, the existing lens gasket flange connection technology is time-consuming, labor-intensive, and inefficient. Utility Model Content

[0004] To address the shortcomings of the aforementioned background technology, this utility model proposes a lens pad installation fixture, which solves the problems of time-consuming, labor-intensive, and inefficient installation of lens pad flange connections in the prior art.

[0005] The technical solution of this utility model is achieved as follows: A lens pad installation fixture includes a split-design lens pad fixing plate. The lens pad fixing plate has symmetrically arranged arc-shaped mounting slots. A lens pad positioning hole is located at the center of the front end face of the lens pad fixing plate, and a limiting hole is located at the center of the rear end face of the lens pad fixing plate. The arc-shaped mounting slots and the lens pad positioning hole are both connected to the limiting hole. An annular positioning boss is provided inside the lens pad positioning hole, and the annular positioning boss corresponds to the mounting slot on the lens pad. This fixture enables rapid and automatic alignment and installation between the lens pad and the welded threaded connector, effectively improving installation efficiency and reducing the number of installation personnel required.

[0006] Further preferably, the lens pad fixing plate includes a left semicircular plate and a right semicircular plate. Left ear seats are provided on both sides of the left semicircular plate, and right ear seats are provided on both sides of the right semicircular plate. The left and right ear seats cooperate with each other and are fixed by fasteners. The ear seats enable a quick and stable connection between the left and right semicircular plates.

[0007] In one implementation, the fastener is a bolt, which secures the left ear seat to the corresponding right ear seat via a nut. Using bolts for connection is a common and effective method, and it is also cost-effective.

[0008] In one implementation, the fastener is a latch that locks the left ear seat to the corresponding right ear seat. Using a latch for connection is a convenient and easy-to-operate method.

[0009] Further preferably, both the left and right semi-circular disks are provided with arc-shaped mounting slots. The center of the left semi-circular disk has a small left semi-circular hole and a large left semi-circular hole positioned front to back, while the center of the right semi-circular disk has a small right semi-circular hole and a large right semi-circular hole. The small left and right semi-circular holes cooperate to form a lens pad positioning hole, and the large left and right semi-circular holes cooperate to form a limiting hole. Adopting a symmetrical split structure, the left and right semi-circular disks clamp the lens pad using fasteners to achieve rapid positioning and installation.

[0010] In one embodiment, the limiting hole is provided with a positioning point protrusion, which is located on the same ring and extends 0.5~1mm beyond the inner wall of the limiting hole. The positioning point protrusion is used to position the threaded connector welded to end A, and at the same time ensures a stable connection between the tooling and the threaded connector welded to end A.

[0011] In one embodiment, a positioning protrusion ring is provided inside the limiting hole, and the cross-section of the positioning protrusion ring extends 0.5~1mm beyond the inner wall of the limiting hole. The positioning protrusion is used to position the threaded connector welded to end A, and at the same time ensures a stable connection between the tooling and the threaded connector welded to end A.

[0012] Further preferably, the lens pad fixing plate is located between the first flange of the welded threaded connector at end A and the second flange of the welded threaded connector at end B, and at least two flange bolts between the first and second flanges can pass through the arc-shaped mounting slot. Specifically, the limiting hole matches the first flange of the welded threaded connector at end A. Both the assembly end of the welded threaded connector at end A and the conversion end of the welded threaded connector at end B are provided with conical grooves that match the lens pad; to ensure that the lens pad can be stably positioned between the welded threaded connector at end A and end B.

[0013] The beneficial effects of this utility model are as follows: The lens pad fixing plate of this utility model adopts a split design, which can stably hold the circular lens pad and facilitate quick and coaxial installation with the welded threaded pipe at end A. The mounting and fixing groove designed on the outer circle of the lens pad allows for hoisting with a thin line in the traditional installation mode; when using the lens pad installation fixture, the outer circle of the lens pad and the lens pad positioning hole of the fixture cooperate, and the lens pad mounting and fixing groove and the annular positioning boss cooperate together for positioning, thereby ensuring the coaxiality of the lens pad and the welded threaded pipe, improving installation accuracy and ensuring sealing performance. The inner hole of the limiting hole of this utility model cooperates with the outer circle of the flange of the welded threaded pipe at end A, which can indirectly and effectively automatically ensure the coaxiality of the lens pad and the flange at end A; at the same time, when the fixture is fixed on the first flange, it can avoid personnel from aligning and fixing the lens pad during installation. The fixture is designed with an arc-shaped installation through groove, which allows most of the flange fixing bolts to be installed in place during installation, and then the fixture can be removed to install the remaining bolts; thus improving installation efficiency. Attached Figure Description

[0014] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a side view of the present invention in its installed state;

[0016] Figure 2 for Figure 1 View from AA direction;

[0017] Figure 3 This is a schematic diagram of the lens pad structure;

[0018] Figure 4 This is a front view schematic diagram of the lens pad mounting plate;

[0019] Figure 5 for Figure 4 BB-direction view;

[0020] Figure 6 This is a schematic diagram of the welded threaded connector end at end A. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1, as Figure 1 , 2 As shown, a lens pad mounting fixture includes a split-design lens pad fixing plate 1. The split design allows for stable holding of the circular lens pad and facilitates quick and coaxial installation with the threaded connector welded to end A. In this embodiment, the lens pad fixing plate 1 has symmetrically arranged arc-shaped mounting slots 2 for the passage of flange bolts 9, enabling interference-free installation. A lens pad positioning hole 3 is located at the center of the front face of the lens pad fixing plate 1, matching the lens pad for circumferential positioning. A limiting hole 4 is located at the center of the rear face of the lens pad fixing plate 1, matching the threaded connector welded to end A to ensure quick positioning and connection between the mounting fixture and the threaded connector. Both the arc-shaped mounting slots 2 and the lens pad positioning hole 3 are connected to the limiting hole 4. An annular positioning boss 31 is provided within the lens pad positioning hole 3, corresponding to the mounting groove 6 on the lens pad 5. The cooperation between the annular positioning boss and the mounting groove enables the fixture to stably hold the lens pad. The lens pad's outer circumference is designed with mounting and fixing grooves 6, such as... Figure 3 As shown, in the traditional installation mode, a thin line can be used to suspend the lens in the mounting groove. When using the lens pad mounting fixture, the outer circle of the lens pad and the lens pad positioning hole of the fixture are matched, and the lens pad mounting groove and the annular positioning boss are matched together for positioning, which can ensure the coaxiality of the lens pad and the fixture and improve the installation accuracy.

[0023] The lens gasket installation fixture is used to install the lens flange as follows: First, use the lens gasket installation fixture to fix the lens gasket. Then, put the lens gasket installation fixture on the outer circle of the flange at end A, keeping the lens gasket and the welded threaded pipe at end A coaxial. Next, align and install the welded threaded pipe 7 at end A and the welded threaded pipe 8 at end B. First, install the flange bolts corresponding to the arc-shaped mounting groove 2. Then, after removing the lens gasket installation fixture, install the remaining two flange bolts to complete the entire installation process. The entire installation process is simple to operate and has precise positioning, further improving the installation efficiency of the lens flange.

[0024] Example 2, as Figure 4 , 5As shown, a lens pad mounting fixture is further optimized based on Embodiment 1. In this embodiment, the split-design lens pad fixing plate 1 specifically includes a left semicircular plate 11 and a right semicircular plate 12. The left semicircular plate 11 and the right semicircular plate 12 have the same structure. The left semicircular plate 11 has a left ear seat 13 on both sides, and the right semicircular plate 12 has a right ear seat 14 on both sides. The left ear seat 13 and the right ear seat 14 cooperate and are fixed by fasteners 15 to ensure that the left semicircular plate 11 and the right semicircular plate 12 stably clamp and hold the lens pad in the circumferential direction. As a preferred embodiment, the fastener 15 is a bolt. The corresponding left and right ear seats are provided with bolt holes for the bolt to pass through. The bolts are fixed to the left ear seat 13 and the corresponding right ear seat 14 by nuts, realizing the fixed connection of the left semicircular plate 11 and the right semicircular plate 12. The bolt fixing connection method is a common and effective connection method with low cost.

[0025] In this embodiment, both the left semicircular disk 11 and the right semicircular disk 12 are provided with arc-shaped mounting slots 2. The central angle of the arc-shaped mounting slot is 90°~150°. The size of the central angle is related to the number of flange bolts, ensuring that as many flange bolts as possible can pass through the arc-shaped mounting slot 2 during installation. A small left semicircular hole and a large left semicircular hole are formed at the center of the left semicircular disk 11, and a small right semicircular hole and a large right semicircular hole are formed at the center of the right semicircular disk 12. The small left semicircular hole and the small right semicircular hole cooperate to form a lens pad positioning hole 3, which limits and fixes the lens pad from the front end. The large left semicircular hole and the large right semicircular hole cooperate to form a limiting hole 4, which connects to the threaded connector welded to end A from the rear end to limit and fix the fixture. The lens pad positioning hole and the limiting hole are coaxially arranged to ensure the coaxiality of the lens pad and the threaded connector welded to end A, improving installation accuracy and efficiency.

[0026] Example 3: A lens pad mounting fixture. Based on Example 1 or 2, this example further optimizes the design. In this example, the fastener 15 is a latch, which locks the left ear seat 13 to the corresponding right ear seat 14. The latch's locking tongue is fixed to the right ear seat, and the latch's hook is fixed to the left ear seat. The locking connection between the locking tongue and the hook achieves a fixed connection between the left semi-disc 11 and the right semi-disc 12. Using a latch for fixing is a relatively convenient connection method and is easy to operate.

[0027] In this embodiment, as a preferred solution, the inner wall of the limiting hole 4 is provided with a plurality of positioning point protrusions, which are located on the same ring. Preferably, there are 4, 6, or 8 positioning point protrusions. The distance from which the positioning point protrusions extend out of the inner wall of the limiting hole 4 is 0.5~1mm, preferably 0.7mm. While not affecting the smooth insertion and engagement of the limiting hole 4 with the first flange of the welded threaded pipe at end A, the positioning point protrusions increase the assembly force between the first flange of the welded threaded pipe at end A and the limiting hole 4, so as to ensure that the tooling can make stable contact and connection with the welded threaded pipe at end A.

[0028] In this embodiment, during assembly, the lens pad fixing plate 1 is located between the first flange 71 of the threaded connector 7 at end A and the second flange 81 of the threaded connector 8 at end B. At least two flange bolts 9 between the first flange 71 and the second flange 81 can pass through the arc-shaped mounting slot 2. After disassembling the lens pad mounting fixture, the remaining flange bolts are installed to complete the lens flange installation. In this embodiment, the limiting hole 4 matches the first flange 71 of the threaded connector 7 at end A to achieve a precise connection between the lens pad fixing plate and the threaded connector 7 at end A. The lens pad fixing plate 1 adopts a left-right symmetrical split structure. The left and right parts can be fixed together by fasteners. The inner hole Φd of the limiting hole 4 matches the outer circle ΦD of the first flange 71 of the welded threaded pipe 7 at end A, which can indirectly and effectively ensure the coaxiality of the lens pad and the flange at end A. At the same time, when the fixture is fixed on the first flange 71, it can avoid personnel from aligning and fixing the lens pad during the installation process. The fixture is designed with bolt mounting holes, i.e., arc-shaped mounting slots, so that most of the flange fixing bolts can be installed in place first during the installation process, and then the fixture can be removed to install the remaining bolts.

[0029] like Figure 6 As shown, the assembly end of the threaded connector 7 welded at end A and the conversion end of the threaded connector 8 welded at end B are both provided with conical grooves that match the lens pad 5, so as to achieve positioning of the lens pad and achieve sealing under a certain preload when coaxial with the lens pad.

[0030] Example 4: A lens pad mounting fixture. Based on Example 1 or 2, this example differs from Example 3 in that, as a preferred embodiment, a positioning protrusion ring is provided inside the limiting hole 4. The distance by which the cross-section of the positioning protrusion ring extends beyond the inner wall of the limiting hole 4 is 0.5~1mm, preferably 0.7mm. While not affecting the smooth insertion and engagement of the limiting hole 4 with the first flange of the welded threaded pipe at end A, the positioning protrusion ring increases the assembly force between the first flange of the welded threaded pipe at end A and the limiting hole 4, thereby ensuring that the fixture can stably connect with the welded threaded pipe at end A.

[0031] To install a lens-type flange using a lens gasket installation fixture, first secure the lens gasket with the fixture. Then, place the lens gasket onto the outer circumference of the first flange and secure it with fasteners. At this point, the lens gasket and the threaded connector at end A should be coaxial. Next, align and install the threaded connector at end B with the threaded connector at end A. (Taking an 8-thread flange as an example...) Figure 1 As shown, six flange bolts numbered 2, 3, 4, 6, 7, and 8, along with their nuts and washers, are installed and pre-tightened in sequence. Finally, after removing the lens gasket installation fixture, two flange bolts numbered 1 and 5, along with their nuts and washers, are installed to complete the entire installation process.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lens pad mounting fixture, characterized in that: The lens pad fixing plate (1) is designed in a split manner. The lens pad fixing plate (1) has symmetrically arranged arc-shaped mounting grooves (2). The lens pad fixing plate (1) has a lens pad positioning hole (3) at the center of the front end face and a limit hole (4) at the center of the rear end face. The arc-shaped mounting groove (2) and the lens pad positioning hole (3) are connected to the limit hole (4). The lens pad positioning hole (3) has an annular positioning boss (31) inside. The annular positioning boss (31) corresponds to the mounting and fixing groove (6) opened on the lens pad (5).

2. The lens pad mounting fixture according to claim 1, characterized in that: The lens pad fixing plate (1) includes a left semicircular plate (11) and a right semicircular plate (12). The left semicircular plate (11) is provided with a left ear seat (13) on both sides, and the right semicircular plate (12) is provided with a right ear seat (14) on both sides. The left ear seat (13) and the right ear seat (14) cooperate and are fixed by fasteners (15).

3. The lens pad mounting fixture according to claim 2, characterized in that: The fastener (15) is a bolt, which fixes the left ear seat (13) and the corresponding right ear seat (14) with a nut.

4. The lens pad mounting fixture according to claim 2, characterized in that: The fastener (15) is a latch that locks the left ear seat (13) to the corresponding right ear seat (14).

5. The lens pad mounting fixture according to any one of claims 2 to 4, characterized in that: Both the left semicircular disk (11) and the right semicircular disk (12) are provided with arc-shaped mounting slots (2). The left semicircular disk (11) has a small left semicircular hole and a large left semicircular hole arranged in front and behind at the center. The right semicircular disk (12) has a small right semicircular hole and a large right semicircular hole at the center. The small left semicircular hole and the small right semicircular hole cooperate to form a lens pad positioning hole (3). The large left semicircular hole and the large right semicircular hole cooperate to form a limiting hole (4).

6. The lens pad mounting fixture according to claim 5, characterized in that: The limiting hole (4) is provided with a positioning point protrusion, which is located on the same ring. The positioning point protrusion extends out of the inner wall of the limiting hole (4) by a distance of 0.5~1mm.

7. The lens pad mounting fixture according to claim 5, characterized in that: The limiting hole (4) is provided with a positioning protrusion ring, and the distance by which the cross-section of the positioning protrusion ring extends out of the inner wall of the limiting hole (4) is 0.5~1mm.

8. The lens pad mounting fixture according to claim 1, 6, or 7, characterized in that: The lens pad mounting plate (1) is located between the first flange (71) of the welded threaded pipe (7) at end A and the second flange (81) of the welded threaded pipe (8) at end B. At least two flange bolts (9) between the first flange (71) and the second flange (81) can pass through the arc-shaped mounting slot (2).

9. The lens pad mounting fixture according to claim 8, characterized in that: The limiting hole (4) matches the first flange (71) of the threaded pipe (7) welded to end A.

10. The lens pad mounting fixture according to claim 9, characterized in that: The assembly end of the welded threaded connector (7) at end A and the conversion end of the welded threaded connector (8) at end B are both provided with conical grooves that match the lens pad (5).

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