Novel pipe fitting plugging device

Abstract

The utility model relates to the technical field of pipeline pressure tapping plugging, in particular to a novel pipe fitting lower plugging device. Comprising a shell, a pull rod, a worm gear case, a worm gear, a spindle, a worm, a sealing sleeve, a lead screw, a first sealing ring, a nut and a handle rod. According to the pipe fitting lower plugging device, the main shaft is driven to rotate through the worm gear and the worm, accurate stretching and retracting of the plugging locking ring can be achieved, a lock hole for plugging and fixing does not need to be machined in the outer edge of a hole-opening plugging pipe fitting, the hidden danger of later leakage of a lock hole of a traditional hole-opening plugging pipe fitting is avoided, and the lower plugging device is dustproof, waterproof, good in pressure-resistant sealing performance, high in safety and suitable for popularization and application. The leakage risk is low.

Description

Technical Field

[0001] This utility model relates to the field of pipeline pressurized opening and sealing technology, and in particular to a novel pipe fitting plug. Background Technology

[0002] In pipeline drilling or maintenance work, pressurized operations are often required, which necessitates sealing the pressurized pipeline. During the operation, a plug is often used to apply various operations to the pipe fitting, such as plugging or lifting the plug.

[0003] For example, the internal locking pipe fitting of the linkage structure device of our company's prior invention patent (CN201811414863.8), and the internal locking lower plug of our company's prior utility model patent (CN202223092775.5), are used together for sealing pressurized pipelines.

[0004] However, the company's existing utility model patent (CN202223092775.5) is an internal locking lower plug, which has a relatively complex structure, is difficult to manufacture and process, and is not reliable in terms of pressure resistance and airtightness, and is not convenient to operate. Utility Model Content

[0005] The purpose of this utility model is to provide a new type of pipe plug that is used in conjunction with an internal locking pipe fitting to complete the internal plugging installation work. This solves the problems of high production and processing difficulty, insufficient pressure resistance and airtightness, and inconvenient operation of existing plugs. It adds the spindle rotation function of the plug and also improves the pressure resistance and airtightness.

[0006] Specifically, it is a new type of pipe fitting lower plug, which includes a housing, a pull rod, a worm gear box, a worm gear, a main shaft, a worm, a sealing sleeve, a screw, a first sealing ring, a nut, and a handle rod;

[0007] The top of the housing is provided with an end cap, and the lead screw is rotatably disposed inside the housing. The top of the lead screw passes through the end cap and is connected to a handle rod.

[0008] The tie rod passes through the lead screw, and the tie rod and the lead screw are sealed by a sealing sleeve.

[0009] A main shaft is fitted between the outer casing and the lead screw. The lead screw is threadedly connected to the main shaft and drives the transmission. When the handle is rotated, the lead screw rotates synchronously, driving the main shaft to move up and down. A first sealing ring is provided between the main shaft and the outer casing. The main shaft drives the pull rod to move up and down.

[0010] The bottom of the outer shell is fixedly connected to the worm gear box. The worm gear box contains a worm gear mechanism, including a worm wheel and a worm. The worm wheel is horizontally rotatable inside the worm gear box, and the worm is rotatable on one side of the worm gear box. At least one end of the worm passes through the worm gear box and connects to the outside, and controls the rotation of the worm, thereby driving the turbine to rotate.

[0011] The lower end of the spindle has an inner hole with a snap-fit ​​notch on the hole wall, and the bottom of the pull rod has a connecting part.

[0012] The worm gear has a through hole in the middle, and the main shaft passes through the through hole of the worm gear. The main shaft and the through hole cooperate with each other. Rotating the worm can drive the worm gear and the main shaft to rotate synchronously without affecting the up and down movement of the main shaft.

[0013] The lower end of the spindle has an inner hole with a snap-fit ​​notch on the hole wall, and the bottom of the pull rod has a connecting part.

[0014] Preferably, the outer edge of the spindle is machined with a long keyway, and the long keyway is fitted with a T-key in the through hole of the worm gear.

[0015] Preferably, the notch on the hole wall engages with the internal locking plug, and the rotation of the main shaft causes the internal locking plug to lock and release.

[0016] Preferably, a nut is installed on the upper part of the spindle, the external thread of the nut is connected to the spindle and fixed by a screw, and the internal thread of the nut is connected to the lead screw.

[0017] Preferably, a lead screw bearing is provided between the lead screw and the housing.

[0018] Preferably, a limiting nut is provided inside the housing between the lead screw bearing and the main shaft, and a second sealing ring is provided between the limiting nut and the housing.

[0019] Preferably, the top of the lever is provided with a handle, and the lever is provided with a scale.

[0020] Preferably, the sealing sleeve is threaded to the lead screw, and a third sealing ring is provided between the sealing sleeve and the pull rod.

[0021] Preferably, the worm gear box is provided with an upper limit block and a lower limit block, the worm gear is located between the upper and lower limit blocks, and worm gear bearings are respectively provided between the worm gear and the upper and lower limit blocks.

[0022] Preferably, the lower end of the pull rod is provided with a limiting block and a limiting bolt, and the main axis between the limiting block and the limiting bolt protrudes inward, with its inner diameter being smaller than the outer diameter of the limiting block and the length of the limiting bolt.

[0023] Preferably, a spindle bearing is provided between the lower end of the limiting block and the spindle.

[0024] Preferably, the worm gear box is cylindrical and has flanges on both the top and bottom. A worm gear box is arranged laterally on the side of the worm gear box. Worm bearings and seals are provided between both ends of the worm and the worm gear box. Sealing covers are provided at both ends of the worm gear box.

[0025] Preferably, the connecting part has an external thread and is connected to the internal locking plug thread.

[0026] Preferably, the lower end of the spindle is provided with an inner hole, the hole wall is provided with a notch to engage with the inner lock plug, and the inner lock plug is locked and released by rotation, and the bottom of the pull rod is provided with an external thread to be threadedly connected to the inner lock plug.

[0027] Preferably, the worm gear is equipped with a rotation counter. Beneficial effects

[0028] This utility model pipe plug is used in conjunction with an internal locking pipe fitting, enabling quick installation of internal plugs in pipe fittings. The product has a compact structure, precise transmission, is safe and reliable, and has a simple appearance.

[0029] This utility model of pipe plugs uses a worm gear to drive the main shaft to rotate, which can achieve precise extension and retraction of the plugging locking ring. The open-hole sealing pipe fitting no longer needs to be machined with a locking hole for fixing the plug on the outer edge, which solves the hidden danger of leakage in the later stage of traditional open-hole sealing pipe fittings. The product is dustproof and waterproof, pressure resistant and has good sealing performance, high safety and low leakage risk. Attached Figure Description

[0030] Figure 1 This is a partial cross-sectional view of the vertical structure of an embodiment of the present utility model;

[0031] Figure 2 This is a partial cross-sectional view of the vertical structure of the upper part of this utility model;

[0032] Figure 3 This is a partial cross-sectional view of the vertical structure in the middle part of this utility model;

[0033] Figure 4 This is a partial cross-sectional view of the vertical structure at the lower end of this utility model;

[0034] Figure 5 This utility model Figure 4 Cross-sectional view of the transverse structure of the middle section A;

[0035] Figure 6 This is a cross-sectional view of the vertical structure of the internal locking block of this utility model;

[0036] The attached diagram does not include cross-sectional views or shaded lines to facilitate differentiation of the pull rod, handle rod, grip rod, and other structures.

[0037] Outer shell-1, end cap-101, lead screw bearing-102, limit nut-103, second sealing ring-104, pull rod-2, handle rod-201, scale-202, connecting part-203, limit bolt-204, limit block-205, bearing-206, worm gear box-3, worm gear box-301, sealing cover-302, worm gear-4, worm gear bearing-401, upper limit block-402, lower limit block-403, T-key-5, spindle-6, long key 601. Groove-602. Snap-fit ​​notch-603. Limit bolt mounting hole-604. Worm-7. Worm bearing-701. Rotation counter-702. Sealing sleeve-8. Third sealing ring-801. Lead screw-9. First sealing ring-10. Nut-11. Screw-12. Handle rod-13. Internal lock plug-14. Plug body-1401. Handle seat-1402. Pull disc-1403. Connecting rod-1404. Locking ring-1405. Sealing ring-1406. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0039] Furthermore, it should be understood in this utility model that the directions or positional relationships indicated by "up", "down", "front", "back", "left", "right", "top", "bottom", "inner", and "outer" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or element referred to must have this specific orientation or operate in a specific orientation. Therefore, they should not be construed as limitations of this utility model.

[0040] As attached Figure 1 As shown, a novel pipe fitting plug is characterized in that: the plug includes a housing 1, a pull rod 2, a worm gear box 3, a worm gear 4, a main shaft 6, a worm 7, a sealing sleeve 8, a screw 9, a first sealing ring 10, a nut 11, and a handle rod 13;

[0041] As attached Figure 2 As shown, the top of the outer casing 1 is provided with an end cap 101, and the lead screw 9 is rotatably disposed inside the outer casing 1. The top of the lead screw 9 passes through the end cap 101 and is connected to a handle rod 13, which has anti-slip texture.

[0042] Furthermore, the pull rod 2 is inserted inside the lead screw 9, and a lead screw bearing 102 is provided between the lead screw 9 and the outer casing 1, so that the lead screw 9 can rotate flexibly.

[0043] Furthermore, the top of the pull rod 2 is equipped with a handle 201, which has anti-slip texture. Operating the handle 201 allows the pull rod 2 to rotate. The connecting part 203 at the bottom of the pull rod 2 has an external thread, and rotating the pull rod 2 allows it to be threadedly connected to the inner locking plug 14. The pull rod 2 is equipped with a scale 202, which indicates the descent depth of the pull rod 2.

[0044] Furthermore, a main shaft 6 is sleeved between the outer casing 1 and the lead screw 9. The lead screw 9 is threadedly connected to the main shaft 6 and drives the transmission. When the handle rod 13 is rotated, the lead screw 9 rotates synchronously, driving the main shaft 6 to move up and down. The main shaft 6 further drives the pull rod 2 to move up and down. A first sealing ring 10 is provided between the main shaft 6 and the outer casing 1.

[0045] Furthermore, a nut 11 is installed on the upper part of the spindle 6. The external thread of the nut 11 is connected to the spindle 6 and fixed by a screw 12. The internal thread of the nut 11 is connected to the lead screw 9.

[0046] Furthermore, a limiting nut 103 is provided inside the outer casing 1 between the lead screw bearing 102 and the main shaft 6, and a second sealing ring 104 is provided between the limiting nut 103 and the outer casing 1.

[0047] As attached Figure 3 As shown, the pull rod 2 and the lead screw 9 are sealed by a sealing sleeve 8; the sealing sleeve 8 is threadedly connected to the lead screw 9, and a third sealing ring 801 is provided between the sealing sleeve 8 and the pull rod 2.

[0048] like Figure 4 As shown, the bottom end of the outer shell 1 is fixedly connected to the worm gear box 3. The worm gear box 3 contains a worm gear mechanism, including a worm wheel 4 and a worm 7. The worm wheel 4 is horizontally rotatably disposed in the worm gear box 3, and the worm 7 is rotatably disposed on one side of the worm gear box 3. At least one end of the worm 7 passes through the worm gear box 3 and is connected to the outside world, and controls the rotation of the worm 7.

[0049] Furthermore, the worm gear box 3 is provided with an upper limit block 402 and a lower limit block 403, the worm gear 4 is located between the upper and lower limit blocks, and worm gear bearings 401 are respectively provided between the worm gear 4 and the upper and lower limit blocks.

[0050] Furthermore, the worm gear 4 has a through hole in the middle, and the main shaft 6 passes through the through hole of the worm gear 4. The main shaft 6 and the through hole cooperate with each other. Rotating the worm 7 can drive the worm gear 4 and the main shaft to rotate synchronously without affecting the up and down movement of the main shaft 6.

[0051] There are various forms of interaction between the spindle 6 and the through hole. Various groove shapes can be selected for the interaction. In this embodiment, one type is shown, that is, the outer edge of the spindle 6 is machined with a long keyway 601, and the long keyway 601 and the through hole in the worm gear 4 are connected by a T-shaped key 5.

[0052] Furthermore, the worm gear box 3 is cylindrical with flanges on both the top and bottom for easy connection to pipe fittings and the outer casing 1. Each connection point is equipped with a sealing structure, such as a sealing ring. A worm gear box 301 is laterally arranged on the side of the worm gear box 3. The worm gear box 301 is cylindrical and provides a fixed position for the worm 7. Worm bearings 701 and seals are provided between both ends of the worm 7 and the worm gear box 301. Sealing caps 302 are provided at both ends of the worm gear box 301. Both the sealing elements and the sealing caps 302 provide a sealing function. Various types of sealing elements are available, but rubber sealing rings are preferred.

[0053] Furthermore, one end of the worm 7 protrudes from the worm gear box 301 and is equipped with a rotation counter 702. The rotation counter 702 can record the number of rotations of the worm 7, thereby precisely controlling the rotation of the spindle 6. The end of the worm 7 can be connected to a crank handle.

[0054] Furthermore, the lower end of the pull rod 2 is provided with a limiting block 205 and a limiting bolt 204. The main shaft 6 between the limiting block 205 and the limiting bolt 204 protrudes inward, and the main shaft 6 and the pull rod 2 are provided with a sealing ring. Here, the inner diameter of the main shaft 6 is smaller than the outer diameter of the limiting block 205 and the length of the limiting bolt 204, so that the main shaft 6 can drive the pull rod 2 to move up and down without affecting its rotation. A main shaft bearing 206 is provided between the lower end of the limiting block 205 and the main shaft 6, so that the pull rod 2 can rotate flexibly. The side of the main shaft 6 is provided with a limiting bolt mounting hole 603, which facilitates the installation of the limiting bolt 204.

[0055] Furthermore, the lower end of the spindle 6 is provided with an inner hole, the hole wall is provided with a snap-fit ​​notch 602, and the bottom of the pull rod 2 is provided with a connecting part 203.

[0056] like Figure 6 As shown, the inner lock plug 14 includes a plug body 1401, a handle seat 1402, a pull plate 1403, a connecting rod 1404, a locking ring 1405, and a sealing ring 1406.

[0057] Furthermore, the bottom of the pull rod 2 is provided with an external thread that connects to the internal thread of the handle seat 1402.

[0058] The notch 602 on the bore wall engages with the boss on the pull plate 1403 of the internal locking plug. The rotation of the main shaft 6 drives the pull plate 1403, connecting rod 1404, and locking ring 1405 to move accordingly, thus locking and releasing the internal locking plug 14. For more detailed connection and operating principles, please refer to our prior invention patent CN201811414863.8, "An Internal Locking Pipe Fitting for a Linkage Structure Device," or utility model patent CN202223092775.5, "An Internal Locking Lower Plug." Further details are omitted here.

[0059] How to use:

[0060] When the lower plug is in operation, control the operating handle 13 to rotate the screw 9, drive the main shaft 6 to move downward, the lower end hole of the main shaft mates with the inner lock plug handle seat 1402, adjust the pull plate 1403 boss to align with the notch on the lower end face of the main shaft 6, rotate the shaft pull rod 2, tighten the handle seat 1402, so that the main shaft and the inner lock plug are firmly connected.

[0061] The operating handle lever 13 rotates the lead screw 9, driving the main shaft 6 to move downward to the specified position inside the pipe fitting. The worm gear 7 is rotated, driving the worm wheel 4 and the main shaft 6 to rotate. The pull plate 1403, connecting rod 1404, and locking ring 1405 are linked in response. The locking ring expands and enters the annular groove of the pipe fitting, locking the blockage position.

[0062] The process of lifting the blockage is carried out by reversing the operation.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of the utility model without departing from the scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A novel pipe fitting plug, characterized in that: The lower plug includes a housing (1), a pull rod (2), a worm gear box (3), a worm gear (4), a main shaft (6), a worm (7), a sealing sleeve (8), a lead screw (9), a first sealing ring (10), a nut (11), and a handle rod (13). The top of the outer shell (1) is provided with an end cap (101), and the lead screw (9) is rotatably disposed inside the outer shell (1). The top of the lead screw (9) passes through the end cap (101) and is connected to a handle rod (13). The pull rod (2) is inserted inside the lead screw (9), and the pull rod (2) and the lead screw (9) are sealed by a sealing sleeve (8); A main shaft (6) is sleeved between the outer shell (1) and the lead screw (9). The lead screw (9) is threadedly connected to the main shaft (6). When the handle rod (13) is rotated, the lead screw (9) rotates synchronously, driving the main shaft (6) to move up and down. The main shaft (6) drives the pull rod (2) to move up and down. A first sealing ring (10) is provided between the main shaft (6) and the outer shell (1). The bottom end of the outer shell (1) is fixedly connected to the worm gear box (3). The worm gear box (3) contains a worm gear mechanism, including a worm wheel (4) and a worm (7). The worm wheel (4) is horizontally rotatably disposed in the worm gear box (3). The worm (7) is rotatably disposed on one side of the worm gear box (3). At least one end of the worm (7) passes through the worm gear box (3) and is connected to the outside world, and controls the rotation of the worm (7). The worm wheel (4) has a through hole in the middle, and the main shaft (6) passes through the through hole of the worm wheel (4). The main shaft (6) and the through hole cooperate with each other. Rotating the worm (7) can drive the worm wheel (4) to rotate synchronously with the main shaft, without affecting the up and down movement of the main shaft (6). The lower end of the main shaft (6) is provided with an inner hole, and the inner hole wall is provided with a snap-fit ​​notch (602). The bottom of the pull rod (2) is provided with a connecting part (203).

2. The novel pipe fitting plug according to claim 1, characterized in that, The outer edge of the spindle (6) is machined with a long keyway (601), and the long keyway (601) is engaged with the inner through hole of the worm gear (4) by a T-key (5).

3. The novel pipe fitting plug according to claim 1, characterized in that, A nut (11) is installed on the upper part of the main shaft (6). The external thread of the nut (11) is connected to the main shaft (6) and fixed by a screw (12). The internal thread of the nut (11) is connected to the lead screw (9). A lead screw bearing (102) is provided between the lead screw (9) and the outer shell (1).

4. The novel pipe fitting plug according to claim 3, characterized in that, Inside the outer casing (1), a limiting nut (103) is provided between the lead screw bearing (102) and the main shaft (6), and a second sealing ring (104) is provided between the limiting nut (103) and the outer casing (1).

5. The novel pipe fitting plug according to claim 1, characterized in that, The top of the pull rod (2) is provided with a handle rod (201), and the pull rod (2) is provided with a scale (202).

6. The novel pipe fitting plug according to claim 1, characterized in that, The sealing sleeve (8) is threadedly connected to the lead screw (9), and a third sealing ring (801) is provided between the sealing sleeve (8) and the pull rod (2).

7. The novel pipe fitting plug according to claim 1, characterized in that, The worm gear box (3) is provided with an upper limit block (402) and a lower limit block (403). The worm gear (4) is located between the upper and lower limit blocks. Worm gear bearings (401) are provided between the worm gear (4) and the upper and lower limit blocks respectively.

8. The novel pipe fitting plug according to claim 1, characterized in that, The lower end of the pull rod (2) is provided with a limiting block (205) and a limiting bolt (204). The main shaft (6) between the limiting block (205) and the limiting bolt (204) protrudes inward, and its inner diameter is smaller than the outer diameter of the limiting block (205) and the length of the limiting bolt (204). A main shaft bearing (206) is provided between the lower end of the limiting block (205) and the main shaft (6).

9. The novel pipe fitting plug according to claim 1, characterized in that, The worm gear box (3) is columnar and has flanges on both the top and bottom. A worm gear box (301) is arranged laterally on the side of the worm gear box (3). Worm bearings (701) and seals are provided between both ends of the worm (7) and the worm gear box (301). Sealing caps (302) are provided at both ends of the worm gear box (301).

10. The novel pipe fitting plug according to claim 9, characterized in that, The worm gear is equipped with a rotation counter (702).

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