Combined pressure test blind plate

Abstract

The utility model provides a combined pressure test blind plate, which relates to the field of pressure vessel pressure test, and comprises a blind plate body, the upper end surface of the blind plate body is a concave surface, the concave surface is connected with an upper lining plate, the lower end surface of the blind plate body is a tenon surface, and the tenon surface is connected with a lower lining plate; positioning shafts with internal threads are arranged in the centers of the upper end face and the lower end face of the blind plate body respectively. According to the utility model, a four-in-one mode is adopted to optimize the blind plate structure, one pressure test blind plate has four sealing surfaces and can be matched with four pipe flanges for use, the stock quantity of the blind plates is reduced, the manufacturing cost is reduced, the utilization rate of the blind plates is improved, and the use efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of pressure tests for pressure vessels, and particularly relates to a combined pressure test blind plate. Background Art

[0002] The pressure test blind plate is mainly a device used to block the pipe flange during the pressure test of a pressure vessel.

[0003] In the prior art, the pressure test blind plate has a single function and limited use. Specifically, a pressure test blind plate has only one sealing surface and can only be used in combination with one type of pipe flange, resulting in a large number of blind plate inventories, high manufacturing costs, low utilization rate of blind plates, and low usage efficiency.

[0004] In view of the above problems, the present invention optimizes the blind plate structure in a four-in-one manner. A pressure test blind plate has four sealing surfaces and can be used in combination with four types of pipe flanges, reducing the number of blind plate inventories, lowering the manufacturing cost, increasing the utilization rate of blind plates, and improving the usage efficiency. Content of the Utility Model

[0005] The utility model provides a combined pressure test blind plate, which solves the problems in the prior art that the pressure test blind plate has a single function and limited use, resulting in a large number of blind plate inventories, high manufacturing costs, low utilization rate of blind plates, and low usage efficiency.

[0006] To achieve the above object, the technical solution adopted by the utility model is:

[0007] A combined pressure test blind plate includes a blind plate body. The upper end surface of the blind plate body is a concave surface, and the concave surface is connected to an upper lining plate. The lower end surface of the blind plate body is a tenon surface, and the tenon surface is connected to a lower lining plate. Positioning shafts with internal threads are respectively arranged at the centers of the upper and lower end surfaces of the blind plate body.

[0008] Further, the upper lining plate and the lower lining plate are both boss-shaped structures respectively provided with a central positioning hole and two lifting ring threaded holes.

[0009] Further, bolts pass through the central positioning hole and the positioning shaft on the upper end surface of the blind plate body to fix the upper lining plate on the blind plate body; bolts pass through the central positioning hole and the positioning shaft on the lower end surface of the blind plate body to fix the lower lining plate on the blind plate body.

[0010] Further, washers are respectively arranged between the bolts and the upper lining plate and the lower lining plate.

[0011] Further, the radial clearance between the upper lining plate, the lower lining plate and the positioning shaft is 0.5 mm.

[0012] Further, lifting ring screws are arranged in the lifting ring threaded holes of the upper lining plate and the lower lining plate.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The present utility model optimizes the blind flange structure in a four-in-one manner. A pressure test blind flange has four sealing surfaces and can be used in combination with four types of pipe flanges, reducing the inventory quantity of blind flanges, lowering the manufacturing cost, improving the utilization rate of blind flanges, and enhancing the usage efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of the present utility model.

[0017] Figure 2 It is a schematic diagram of the blind flange body in the present utility model.

[0018] Figure 3 It is a schematic structural diagram of the lining plate in the present utility model.

[0019] Explanation of the reference numerals in the drawings:

[0020] 1. Blind flange body; 2. Upper lining plate; 3. Bolt; 4. Washer; 5. Lifting eye screw; 6. Lower lining plate; 7. Concave surface; 8. Tenon surface; 9. Convex surface; 10. Groove surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with the embodiments to detail the present utility model.

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way constitutes a limitation to the present utility model and its application or use. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present utility model. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be clear that, for the sake of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0025] For the sake of description, spatial relative terms such as "above", "over", "on the upper surface", "upper", etc. can be used herein to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the drawings of the device. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "beneath" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations will be made for the spatial relative descriptions used herein.

[0026] The present utility model provides a technical solution: a combined pressure test blind plate, which integrates and optimizes the pressure test blind plates of four sealing surface types, namely concave surface 7, convex surface 9, tongue surface 8, and groove surface 10, with the same standard number, same nominal diameter, and same pressure rating into one body to form a combined pressure test blind plate, which can be sequentially connected in a matching manner with four types of pipe flanges, namely convex surface 9, concave surface 7, groove surface 10, and tongue surface 8, as Figures 1-3 shown, including a blind plate body 1, an upper lining plate 2, bolts 3, washers 4, lifting eye screws 5, and a lower lining plate 6.

[0027] Both the upper and lower ends of the blind flange body 1 have a sealing surface. The first sealing surface is a concave surface 7, which can be connected to the convex surface 9 pipe flange in a matching manner. The second sealing surface is a tenon surface 8, which can be connected to the groove surface 10 pipe flange in a matching manner. The central parts on both the upper and lower sides are positioning shafts with internal threads, which are used for precise installation of the lining plate.

[0028] The lining plate is a boss-shaped part with a central positioning hole and two lifting ring threaded holes. When disassembling and assembling, lifting ring screws 5 are required.

[0029] The upper lining plate 2 is fixed on the upper positioning shaft of the blind flange body 1 by bolts 3. The radial clearance between the upper lining plate 2 and the positioning shaft is 0.5 mm. A washer 4 is installed between the bolt 3 and the upper lining plate 2 to prevent the bolt from loosening. A lifting ring screw 5 is installed in the threaded hole of the upper lining plate 2, forming a third sealing surface as the groove surface 10, which can be connected to the tenon surface 8 pipe flange in a matching manner.

[0030] The lower lining plate 6 is fixed on the lower positioning shaft of the blind flange body 1 by bolts 3. The radial clearance between the lower lining plate 6 and the positioning shaft is 0.5 mm. A washer 4 is installed between the bolt 7 and the lower lining plate 6 to prevent the bolt from loosening. A lifting ring screw 5 is installed in the threaded hole of the lower lining plate 6, forming a fourth sealing surface as the convex surface 9, which can be connected to the concave surface pipe flange 7 in a matching manner.

[0031] The lifting ring screws 5 are evenly fixed on the upper lining plate 2 for quick disassembly and assembly of the lining plate.

[0032] The lifting ring screws 5 are evenly fixed on the lower lining plate 6 for quick disassembly and assembly of the lining plate.

[0033] The upper lining plate 2 and the lower lining plate 6 have the same size structure.

[0034] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A combined pressure test blind plate, characterized in that: The blind plate body (1) comprises a blind plate body (1), the upper end surface of the blind plate body (1) is a concave surface (7), the concave surface (7) is connected to the upper lining plate (2), the lower end surface of the blind plate body (1) is a tenon surface (8), the tenon surface (8) is connected to the lower lining plate (6); the centers of the upper and lower end surfaces of the blind plate body (1) are respectively provided with positioning shafts with internal threads.

2. The combined pressure test blind plate according to claim 1, characterized in that: The upper lining plate (2) and the lower lining plate (6) are boss-shaped structures each provided with a central positioning hole and two lifting ring threaded holes.

3. The combined pressure test blind plate according to claim 2 is characterized in that: The bolt (3) passes through the central positioning hole and the positioning axis on the upper end surface of the blind plate body (1) to fix the upper lining plate (2) on the blind plate body (1); the bolt (3) passes through the central positioning hole and the positioning axis on the lower end surface of the blind plate body (1) to fix the lower lining plate (6) on the blind plate body (1).

4. The combined pressure test blind plate according to claim 3 is characterized in that: Washers (4) are respectively arranged between the bolts (3) and the upper lining plate (2) and the lower lining plate (6).

5. The combined pressure test blind plate according to claim 1, characterized in that: The radial clearance between the upper lining plate (2), the lower lining plate (6) and the positioning shaft is 0.5 mm.

6. The combined pressure test blind plate according to claim 1, characterized in that: Eye screws (5) are arranged in the eye threaded holes of the upper lining plate (2) and the lower lining plate (6).

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