Self-locking hoop and telescopic sealing device

Abstract

The utility model relates to a self-locking type clamp and a telescopic sealing device. The self-locking type clamp comprises a bottom plate provided with a center hole and a plurality of locking plates movably arranged above the bottom plate around the center hole. A plurality of limiting rods, a plurality of guide plates and a plurality of locking bolts are uniformly arranged on the bottom plate around the center hole; each locking plate is provided with a plurality of long kidney-shaped holes which are arranged on the limiting rods or the locking bolts in a sleeving mode, and the outer side of each locking plate is limited by a plurality of guide plates in an abutting mode. The telescopic sealing device comprises a telescopic bag sleeve arranged on the oil tank wave guide pipe in a sleeving mode, and a self-locking type hoop is installed at the top of the telescopic bag sleeve. The installation problem of the top of the telescopic bag sleeve and the upper portion of the wave guide tube can be effectively solved, the installation construction period is shortened, safety is high, installation cost is low, and installation efficiency is high.

Description

Technical Field

[0001] The utility model relates to a telescopic sealing device, in particular to a self-locking clamp and a telescopic sealing device sleeved on a waveguide of an oil tank. Background Art

[0002] The oil and petrochemical fields need to use large oil tanks as storage containers to store oil products. The oil tanks are composed of a steel cylindrical tank body and a circular floating roof that floats up and down in the tank as the oil products go in and out. At the same time, in order to prevent the floating roof from moving horizontally and colliding with the tank body during the up and down movement, causing safety accidents, a waveguide is installed vertically in the oil storage tank, and a guide hole for the waveguide to pass through is set on the floating roof. The waveguide is a hollow structure, and a process opening is set on the waveguide to guide the oil and gas to escape easily from these openings. In order to prevent explosion accidents and prevent certain toxic gases contained in the oil and gas from endangering personal safety, it needs to be sealed.

[0003] To this end, our company has applied for Chinese patent 201721411972.5 "Sealing sleeve for oil storage tank", which uses zippers, Velcro and other methods to enclose and form a telescopic structure, solving the problem of later assembly; and patent 202122309327.5 "Telescopic sealing device for oil tank guide column", which solves the connection problem between the bottom of the telescopic bag and the floating roof. However, the top of the telescopic bag is still connected to the waveguide with a traditional clamp structure. There are two installation methods during engineering construction. One is that the top of the telescopic bag needs to wait for the floating roof to rise to the top of the waveguide before the top of the telescopic bag can be clamped to the upper part of the waveguide. This method requires waiting for the oil tank to be filled with oil to make the floating roof rise, which generally requires a long construction waiting period; the second is to build a scaffolding, and the staff reaches the upper part of the waveguide through the scaffolding and clamps the top of the telescopic bag to the upper part of the waveguide. The cost of building a scaffolding is too high, which greatly increases the construction cost, and there is also a risk of high-altitude operation.

[0004] In summary, the petrochemical industry is in urgent need of a sealing device that is easy to install on the upper part of the waveguide and has good oil and gas sealing effect, high installation efficiency, high safety and low cost. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a self-locking clamp and a telescopic sealing device, so as to solve the installation problem between the top of the telescopic bag sleeve and the upper part of the waveguide, shorten the installation construction period, reduce safety risks, reduce installation costs, and improve installation efficiency.

[0006] The purpose of the utility model is achieved in this way:

[0007] A self-locking clamp comprises a base plate with a center hole, and a plurality of locking plates movably arranged above the base plate around the center hole; a plurality of limit rods, a plurality of guide plates and a plurality of locking bolts are evenly arranged on the base plate around the center hole;

[0008] Each locking plate is provided with a plurality of long waist holes which are sleeved on the limit rod or the locking bolt, and the outer side of each locking plate is supported by a plurality of guide plates to limit the position;

[0009] The limiting rod limits the long waist hole of the locking plate to move along the limiting rod, thereby limiting the movement range of the locking plate;

[0010] The guide plate is provided with an inclined guide surface on one side close to the center hole to limit the outer side of the locking plate from moving along the guide surface;

[0011] A limit block is provided in the middle of the locking bolt, and threads are provided at the upper and lower parts. The limit block limits the locking plate from moving upward.

[0012] Furthermore, the limiting rod is a T-shaped structure, which limits the maximum upward movement distance of the locking plate.

[0013] Furthermore, the center hole is circular, and the installation positions of the limit rods, guide plates, and locking bolts are all located on concentric circles with the center of the center hole.

[0014] Furthermore, the locking plates are of a fan-shaped structure, and the locking plates gather toward the center to form an annular plate, and the inner diameter of the annular plate is smaller than the diameter of the center hole.

[0015] Furthermore, it comprises four locking plates; each locking plate is provided with three long waist holes, which are used to insert two limit rods and a locking bolt respectively, and the outer circle of each locking plate is guided and limited by two guide plates.

[0016] Furthermore, a side wall is provided along the outer edge of the bottom plate, and a plurality of connection holes are provided on the side wall.

[0017] A telescopic sealing device comprises a telescopic bag sleeve mounted on a waveguide of an oil tank, the bottom of the telescopic bag sleeve being fixedly mounted on a floating roof of the oil tank, the top of the telescopic bag sleeve being installed with any of the above-mentioned self-locking clamps, and being connected to a top plate of the oil tank via an upper thread of a locking bolt, each locking plate being pressed downward by the locking bolt, and at the same time being pushed and guided by an inclined guide surface of the guide plate to gather and lock the waveguide, thereby realizing automatic clamping of the waveguide.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The self-locking clamp of the utility model adopts a plurality of locking plates. When the locking plates are pressed down by the locking bolts and move downward, they are limited by the inclined guide surface of the outer guide plate and gather inward synchronously, thereby achieving the effect of clamp locking. The clamp locking can be completed by adjusting the locking bolts. The structure is simple and the operation is convenient.

[0020] The telescopic sealing device of the utility model adopts a self-locking clamp at the top of the telescopic bag sleeve to connect with the oil tank waveguide. The self-locking clamp can clamp the waveguide by adjusting the locking bolt, thereby simplifying the installation operation of the top of the telescopic bag sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model is a structural schematic diagram of a self-locking clamp.

[0022] Figure 2 The utility model is a schematic diagram of the bottom plate structure of a self-locking clamp.

[0023] Figure 3 The utility model is a schematic diagram of a locking plate structure of a self-locking clamp.

[0024] Figure 4 The utility model is a schematic diagram of the installation structure of a telescopic sealing device.

[0025] Figure 5 This is a partial enlarged view of the installation structure of a telescopic sealing device of the utility model.

[0026] in:

[0027] Center hole 1, bottom plate 2, locking plate 3, limit rod 4, guide plate 5, locking bolt 6, long waist hole 7, guide surface 8, limit block 9, side wall 10, connecting hole 11;

[0028] Top plate 20 , waveguide 21 , telescopic bag 22 , floating roof 23 . DETAILED DESCRIPTION Example 1

[0029] See also Figure 1~Figure 3The utility model relates to a self-locking clamp, comprising a base plate 2 with a center hole 1, and a plurality of locking plates 3 movably arranged above the base plate 2 around the center hole 1; a side wall 10 is arranged along the outer edge of the base plate 2, and a plurality of connecting holes 11 are arranged on the side wall 10 for connecting with other components; a plurality of limiting rods 4, a plurality of guide plates 5 and a plurality of locking bolts 6 are evenly arranged around the center hole 1 on the base plate 2; the center hole 1 of this embodiment is circular, and the arrangement of each limiting rod 4, guide plate 5, locking bolt 6 is The installation positions are all located on the concentric circles with the center of the center hole 1; the locking plates 3 are fan-shaped structures, and the locking plates 3 gather toward the center to form an annular plate, and the inner diameter of the annular plate is smaller than the diameter of the center hole 1; in this embodiment, four locking plates 3 are arranged, and three long waist holes 7 are arranged on each locking plate 3, which are respectively used to insert two limit rods 4 and a locking bolt 6, and the outer circle of each locking plate 3 is guided and limited by two guide plates 5, and a total of eight limit rods 4, four locking bolts 6, and eight guide plates 5;

[0030] In other embodiments, the center hole 1 can be flexibly selected according to the shape of the clamped component, and can be a square or other shape. Accordingly, the installation positions of the limit rods 4, the guide plates 5, and the locking bolts 6 also change correspondingly with the shape of the center hole 1.

[0031] Each locking plate 3 is provided with a plurality of long waist holes 7 which are sleeved on the limiting rod 4 or the locking bolt 6. The outer side of each locking plate 3 is supported and limited by a plurality of guide plates 5.

[0032] The limiting rod 4 limits the movement of the long waist hole 7 of the locking plate 3 along the limiting rod 4, limits the movement range of the locking plate 3, and at the same time, the limiting rod 4 is a T-shaped structure, which also limits the maximum upward movement distance of the locking plate 3. A hexagonal bolt can be directly selected and screwed and installed on the bottom plate 2 as the limiting rod 4; the function of the limiting rod 4 is to limit the maximum range of movement of the locking plate 3, including the distance range of convergence and divergence movement along the radius direction of the center hole 1, that is, the length of the long waist hole, and to limit the maximum upward movement distance range of the locking plate 3 in the vertical direction, that is, the bottom vertical height of the T-shaped structure, which is the length of the threaded part of the hexagonal bolt in this example;

[0033] The guide plate 5 is provided with an inclined guide surface 8 on one side close to the central hole 1 to limit the outer side of the locking plate 3 from moving along the guide surface 8; the guide plate 5 is used to limit the movement trajectory of the locking plate 3 and further limit the movement range of the locking plate 3 when it moves in a convergent and divergent manner to the projection length of the guide surface 8 in the horizontal direction. When the locking plate 3 rises, the locking plate 3 can diverge outward and expand, and when it falls, it is gathered and contracted by the guide surface 8;

[0034] The locking bolt 6 is provided with a limit block 9 in the middle and threads are provided at the upper and lower parts. The limit block 9 limits the locking plate 3 from moving upward; the locking bolt 6 is screwed down, the limit block 9 moves down, and the locking plate 3 is pressed downward, so that the locking plate 3 moves downward, and then each locking plate 3 gathers and contracts, playing the role of clamping and tightening, and vice versa, each locking plate 3 diverges toward the outer circle, playing the effect of releasing;

[0035] In summary, the self-locking clamp of the utility model can realize the gathering or divergence of the locking plates 3 only by tightening or loosening the locking bolt 6, thereby clamping or releasing the object located in the center hole 1, and the operation is simple and convenient. Example 2

[0036] See also Figure 4~Figure 5 The utility model relates to a telescopic sealing device, comprising a telescopic bag cover 22 sleeved on an oil tank waveguide 21, the bottom of the telescopic bag cover 22 is fixedly mounted on a floating roof 23 of the oil tank, the top of the telescopic bag cover 22 is installed and connected with a self-locking clamp of the above embodiment through a connecting hole 11, and is connected to a top plate 20 of the oil tank through an upper thread of a locking bolt 6, each locking plate 3 is locked and pressed downward by the locking bolt 6, and at the same time is guided and pushed by the inclined guide surface 8 of the guide plate 5 to gather and lock the waveguide 21, thereby realizing automatic clamp locking of the waveguide 21.

[0037] In the telescopic sealing device of the utility model, the installation between the top of the telescopic bag sleeve and the waveguide adopts a self-locking clamp operation, and the self-locking installation can be completed by simply tightening the locking bolt 6, which is simple and convenient to operate.

[0038] In addition: It should be noted that the above specific implementation is only an optimization scheme of this patent. Any changes or improvements made by technicians in this field based on the above concept are within the scope of protection of this patent.

Claims

1. A self-locking clamp, characterized in that: It comprises a base plate (2) provided with a central hole (1), and a plurality of locking plates (3) movably arranged above the base plate (2) around the central hole (1); a plurality of limit rods (4), a plurality of guide plates (5) and a plurality of locking bolts (6) are evenly arranged on the base plate (2) around the central hole (1); Each locking plate (3) is provided with a plurality of long waist holes (7) which are sleeved on the limiting rod (4) or the locking bolt (6), and the outer side of each locking plate (3) is supported and limited by a plurality of guide plates (5); The limiting rod (4) limits the long waist hole (7) of the locking plate (3) from moving along the limiting rod (4), thereby limiting the movement range of the locking plate (3); The guide plate (5) is provided with an inclined guide surface (8) on one side close to the central hole (1) to limit the outer portion of the locking plate (3) from moving along the guide surface (8); The locking bolt (6) is provided with a limit block (9) in the middle and threads are provided at the upper and lower parts. The limit block (9) limits the locking plate (3) from moving upward.

2. The self-locking clamp according to claim 1, characterized in that: The limiting rod (4) is a T-shaped structure, which limits the maximum upward movement distance of the locking plate (3).

3. The self-locking clamp according to claim 1, characterized in that: The central hole (1) is circular, and the installation positions of the limit rods (4), the guide plates (5), and the locking bolts (6) are all located on concentric circles with the center of the central hole (1).

4. The self-locking clamp according to claim 3, characterized in that: The locking plates (3) are of a fan-shaped structure, and the locking plates (3) gather toward the center to form an annular plate, wherein the inner diameter of the annular plate is smaller than the diameter of the center hole (1).

5. The self-locking clamp according to claim 4, characterized in that: It comprises four locking plates (3); each locking plate (3) is provided with three long waist holes (7) for inserting two limit rods (4) and a locking bolt (6) respectively; the outer circle of each locking plate (3) is guided and limited by two guide plates (5).

6. The self-locking clamp according to claim 1, characterized in that: A side wall (10) is provided along the outer edge of the bottom plate (2), and a plurality of connection holes (11) are provided on the side wall (10).

7. A telescopic sealing device, comprising a telescopic bag sleeve (22) sleeved on a waveguide (21) of an oil tank, wherein the bottom of the telescopic bag sleeve (22) is fixedly mounted on a floating roof (23) of the oil tank, and characterized in that: A self-locking clamp of any one of claims 1 to 6 is installed on the top of the telescopic bag sleeve (22), which is connected to the top plate (20) of the oil tank through the upper thread of the locking bolt (6). Each locking plate (3) moves downward due to the downward pressure of the locking bolt (6), and is simultaneously pushed and guided by the inclined guide surface (8) of the guide plate (5) to gather and lock the waveguide (21), thereby realizing automatic clamping of the waveguide (21).

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