Pipe head plugging device

Abstract

The utility model belongs to the technical field of pipeline maintenance tools, and particularly relates to a pipe head plugging device which comprises an inner clamping plate, a rubber plate and an outer clamping plate which are sequentially arranged in a pipe end wall from inside to outside, the rubber plate is of a circular structure, the diameter of the rubber plate is matched with the inner diameter of a pipeline, a pre-tightening stud is fixed on the inner clamping plate, and the pre-tightening stud is connected with the outer clamping plate. The pre-tightening stud penetrates through the rubber plate and the outer clamping plate and is fastened through the pre-tightening nut, a self-tightening mechanism is connected to the pipe end wall, and the self-tightening mechanism abuts against the outer end face of the outer clamping plate. The pipe head plugging device can be used for simply, quickly, safely and reliably carrying out pressure test and leakage detection, and the test pressure can be greatly improved; and operation can be carried out in a narrow space, the cost is low, and the overhaul and maintenance time can be saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline maintenance tooling, and in particular relates to a pipe head plugging device. Background Art

[0002] With the large-scale development of chemical equipment, some heat exchange tubes with heat exchange functions often crack, break or seriously corrode during use. In order to quickly find defects before replacement or repair, it is necessary to seal a single heat exchange tube and then fill it with water or air to check for leaks. However, the existing sealing devices have complex structures, occupy a large space, are difficult to manufacture, and have a limited scope of use. They are mostly used in fixed places such as factories. Summary of the invention

[0003] In view of the defects of the prior art mentioned above, the purpose of the utility model is to provide a pipe head plugging device which can be carried around and used for repairing pipes and detecting leaks inside equipment such as containers, boilers, dryers, and heat exchangers.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a pipe head plugger, including an inner splint, a rubber plate and an outer splint which are arranged inside the pipe end wall from the inside to the outside in sequence, the rubber plate is a circular structure, the diameter of the rubber plate matches the inner diameter of the pipe, a pre-tightening stud is fixed on the inner splint, the pre-tightening stud passes through the rubber plate and the outer splint and is fastened by a pre-tightening nut, a self-tightening mechanism is connected to the pipe end wall, and the self-tightening mechanism presses against the outer end face of the outer splint.

[0005] Furthermore, the rubber plate is an elastically deformable circular structure, the inner and outer plates clamp the rubber plate by screwing in the pre-tightening nut, and the rubber plate is deformed and sealed by the clamping force of the inner and outer plates.

[0006] Furthermore, the diameters of the inner and outer plates are smaller than the diameter of the rubber plate, the pre-tightening stud is fixed at the center of the inner plate, the rubber plate and the outer plate are provided with through holes at the center, the pre-tightening stud passes through the holes of the rubber plate and the outer plate, and the pre-tightening nut is pressed against the outer end surface of the outer plate.

[0007] Furthermore, the self-tightening mechanism is a folding plate bent at a right angle, which is inserted into the tube end wall. The folding plate part outside the tube is fixedly connected to the outer wall of the tube end wall by a radial tube wall top screw, and the folding plate part inside the tube is pressed against the outer end face of the outer clamping plate.

[0008] Furthermore, the self-tightening mechanism is a folding plate bent at a right angle, which is inserted into the tube end wall. The folding plate part outside the tube is fixedly connected to the outer wall of the tube end wall by a radial tube wall top screw, and the folding plate part inside the tube is connected to an axially arranged outer clamping plate top screw, and the end of the outer clamping plate top screw is pressed against the outer end face of the outer clamping plate.

[0009] Furthermore, a plurality of the self-tightening mechanisms are arranged along the circumference of the pipe end wall.

[0010] The beneficial effects of the utility model are as follows: the pipe head plugging device of the utility model can perform pressure testing and leak detection simply, quickly, safely and reliably, and the test pressure can be greatly increased; it can also be operated in a small space, with low cost, and can save inspection and repair time. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model tube head plugger;

[0012] In the figure: 1. pipe end wall, 2. inner clamping plate, 3. rubber sheet, 4. outer clamping plate, 5. outer clamping plate top screw, 6. self-tightening mechanism, 7. pipe wall top screw, 8. pre-tightening stud, 9. pre-tightening nut. DETAILED DESCRIPTION

[0013] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0014] See attached Figure 1 A pipe head plugger comprises an inner clamping plate 2, a rubber plate 3 and an outer clamping plate 4 which are sequentially arranged inside a pipe end wall 1 from the inside to the outside, the rubber plate 3 being a circular structure, the diameter of the rubber plate 3 matching the inner diameter of the pipe, a pre-tightening stud 8 being fixed on the inner clamping plate 2, the pre-tightening stud 8 passing through the rubber plate 3 and the outer clamping plate 4 and being fastened by a pre-tightening nut 9, the rubber plate 3 being an elastically deformable circular structure, the inner clamping plate 2 and the outer clamping plate 4 clamping the rubber plate 3 by screwing in the pre-tightening nut 9, the rubber plate 3 generating deformation and sealing the pipe by the clamping force of the inner clamping plate 2 and the outer clamping plate 4; a self-tightening mechanism 6 is connected to the pipe end wall 1, the self-tightening mechanism 6 pressing against the outer end surface of the outer clamping plate 4.

[0015] Furthermore, the diameter of the inner clamping plate 2 and the outer clamping plate 4 is smaller than the diameter of the rubber plate 3, the pre-tightening stud is fixed at the center of the inner clamping plate, the rubber plate and the outer clamping plate are provided with a through light hole at the center of the circle, the pre-tightening stud passes through the light hole of the rubber plate and the outer clamping plate, and the pre-tightening nut is pressed against the outer end surface of the outer clamping plate. The inner clamping plate 2 and the outer clamping plate 4 are provided with a gap between the outer diameter surface and the inner surface of the pipe end wall 1, so that the movement of the inner clamping plate 2 and the outer clamping plate 4 is not interfered by the pipe end wall 1, and at the same time, a better deformation space can be provided for the rubber plate 3.

[0016] Furthermore, the self-tightening mechanism 6 is a folding plate bent at a right angle, which is inserted into the tube end wall 1. The folding plate portion outside the tube is fixedly connected to the outer wall of the tube end wall 1 by a radial tube wall top screw 7, and the folding plate portion inside the tube is connected to an axially arranged outer clamping plate top screw 5, and the end of the outer clamping plate top screw 5 is pressed against the outer end face of the outer clamping plate 4. Figure 1 The self-tightening mechanism shown is one. When the pipe diameter is large, multiple self-tightening mechanisms can be installed to achieve better effects.

[0017] Based on the above technical solution, in another embodiment, when the pipe diameter is too small, the outer clamping plate top screw and its connecting part can be eliminated, and only the "U"-shaped part of the self-tightening mechanism is retained to save the internal space of the pipe. The "U"-shaped structure end of the self-tightening mechanism is pressed against the outer end face of the outer clamping plate to fix the outer clamping plate.

[0018] The device is composed of an inner clamping plate 2, a rubber plate 3, an outer clamping plate 4, an outer clamping plate top screw 5, a self-tightening mechanism 6, a pipe wall top screw 7 and pre-tightening stud nuts 8 and 9.

[0019] The inner splint 2, the rubber sheet 3 and the outer splint 4 form a sealing system of the occluder. The thickness of the rubber sheet should not be too thin, and the material should be soft and elastic. Its outer cylindrical surface forms a seal with the inner surface of the pipe end. The inner surface of the pipe end should be kept to a certain degree of smoothness before use.

[0020] The center of the inner plywood 2 is welded to one end of the pre-tightening stud 8, and a circular light hole is opened in the center of the rubber plate to ensure that the pre-tightening stud 8 can pass freely. The surfaces between the inner plywood 2 and the rubber plate 3 should be smooth and flat to form a seal. The outer plywood 4 is installed on the rubber plate 3 and locked with a pre-tightening nut 9. When the inner plywood 2, the rubber plate 3 and the outer plywood 4 are placed inside the pipe, the pre-tightening nut 9 (special long sleeve wrench) is properly tightened to compress the rubber plate 3 so that it extends to the surroundings and forms a seal with the inner wall of the pipe. The tighter the pre-tightening nut 9 is tightened, the higher the pressure bearing capacity; when the rubber plate 3 is placed in the pipe, the installation distance of the self-tightening mechanism should be considered to prevent the outer plywood 4 from being too far or too short from its round head outer plywood top screw 5 and failing to self-tighten in time or the self-tightening mechanism from failing to be installed.

[0021] The number of self-tightening mechanisms should be determined based on pressure calculations and placed evenly around the pipe opening so that force is evenly applied in all directions. First, tighten the top screw 7 on the outside of the pipe wall to fix the self-tightening mechanism 6, and then push the top screw 5 of the outer plywood onto the outer plywood 4 to prevent the sealing device from moving outward. When the outer plywood 4 does not move and the inner plywood 2 moves outward under pressure, the rubber sheet 3 is compressed from the inside to further increase the sealing effect and form self-tightening.

[0022] During the self-tightening process, the pre-tightening nut 9 may become loose and ineffective, which can be ignored. If there is leakage from the inside of the pipe wall, the nut 9 should be tightened in time to increase the self-tightening force.

[0023] After the pressure test and before the pressure is released, the pre-tightening nut 9 should be loosened a certain distance in time to facilitate disassembly.

[0024] The pipe head plug of the utility model is manufactured in the factory and used on site. It is designed individually according to the pipe standard. Each specification of the inner diameter of the pipe needs to be equipped with a special sealing and self-tightening mechanism. The device has an adaptability range of fixed pipe diameters and cannot be used beyond the limit. When the pipe diameter is large, multiple self-tightening mechanisms can be installed to achieve better results; when the pipe diameter is too small, the outer splint top screw and its connecting part can be eliminated, and only the "U"-shaped part of the self-tightening mechanism is retained to save space inside the pipe. The device has a simple structure and is easy to manufacture. It is convenient, fast and safe to use and load and unload. It does not damage the pipe end. It can be carried with you to repair pipes and detect leaks inside containers, boilers, dryers, heat exchangers and other equipment.

[0025] It should be noted that the parts not described in detail in the present invention are prior art.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0031] The above examples are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many variations. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. A pipe head occluder, characterized in that: It includes an inner clamping plate, a rubber plate and an outer clamping plate which are arranged inside the pipe end wall from the inside to the outside in sequence. The rubber plate is a circular structure, and the diameter of the rubber plate matches the inner diameter of the pipe. A pre-tightening stud is fixed on the inner clamping plate, and the pre-tightening stud passes through the rubber plate and the outer clamping plate and is fastened by a pre-tightening nut. A self-tightening mechanism is connected to the pipe end wall, and the self-tightening mechanism presses against the outer end surface of the outer clamping plate.

2. The tube head occluder according to claim 1, characterized in that: The rubber plate is an elastically deformable circular structure. The inner and outer plates clamp the rubber plate by screwing in the pre-tightening nut. The rubber plate is deformed and seals the pipeline by the clamping force of the inner and outer plates.

3. The tube head occluder according to claim 1, characterized in that: The diameters of the inner and outer clamping plates are smaller than the diameter of the rubber plate. The pre-tightening stud is fixed at the center of the inner clamping plate. The rubber plate and the outer clamping plate are provided with through light holes at the center of the circle. The pre-tightening stud passes through the light holes of the rubber plate and the outer clamping plate. The pre-tightening nut is pressed against the outer end surface of the outer clamping plate.

4. The tube head occluder according to claim 1, characterized in that: The self-tightening mechanism is a folding plate bent at a right angle, which is inserted into the tube end wall. The folding plate part outside the tube is fixedly connected to the outer wall of the tube end wall by a radial tube wall top screw, and the folding plate part inside the tube is pressed against the outer end surface of the outer clamping plate.

5. The tube head occluder according to claim 1, characterized in that: The self-tightening mechanism is a folding plate bent at a right angle, which is inserted into the tube end wall. The folding plate part outside the tube is fixedly connected to the outer wall of the tube end wall by a radial tube wall top screw, and the folding plate part inside the tube is connected to an axially arranged outer clamping plate top screw, and the end of the outer clamping plate top screw is pressed against the outer end face of the outer clamping plate.

6. The tube head occluder according to claim 1, characterized in that: The self-tightening mechanisms are arranged in a plurality along the circumferential direction of the pipe end wall.

Images