A new type of sealing device for hydrostatic test of reducing tee

Abstract

The utility model discloses a novel diameter different three way water pressure test sealing device relates to heat exchanger water pressure test technical field, solves the problem that current water pressure mode cannot satisfy diameter different three way water pressure test demand. The utility model discloses a water pressure screw plug, upper pressure plate, sealing cylinder and two lower pressure plate, and the inner side of sealing cylinder lower extreme is provided with the chamfer structure and and the pipe butt joint of diameter different three way upper extreme, and the upper pressure plate is set up at sealing cylinder upper extreme, and the bottom of diameter different three way is provided with two lower pressure plate, and the upper pressure plate and lower pressure plate are connected through bolt, and the upper pressure plate is provided with the threaded hole, and the threaded hole is installed with water pressure screw plug. The utility model discloses can realize diameter different three way's sealing when heat exchanger equipment water pressure, has solved the inside expansion self -clamping type water pressure expansion plug water pressure indentation and the technical problem that the water pressure ring of external clamping type water pressure tool needs to weld leads to product surface to reach the product quality requirement, has guaranteed product quality.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger hydrostatic testing technology, specifically a novel sealing device for hydrostatic testing of a reducing tee. Background Technology

[0002] During the hydrostatic test of the heat exchanger, the reducing tee needs to be sealed. Both the inner and outer walls of the reducing tee are machined surfaces, and indentations are not allowed after the hydrostatic test. There are two existing hydrostatic testing methods: one is to install an internally expanding self-clamping hydrostatic plug, where the tool's three-lobed conical expansion cylinder expands and tightens against the inner wall of the tee to withstand the axial force of the water pressure. However, the inner wall of the reducing tee is machined and indentations are not allowed. Furthermore, the straight section of the inner wall is too short, making the installation of the hydrostatic plug difficult. The second method is to install an externally clamping hydrostatic tool. Since the axial force borne by the hydrostatic tool has no point of application, a process hydrostatic ring needs to be welded to the outer diameter of the reducing tee connector as a point of application. Because the reducing tee is made of stainless steel, welding a hydrostatic ring is difficult. Additionally, the high surface quality requirements of the product do not allow for the welding of process accessories. Due to the complexity of the product, the two conventional methods cannot complete the hydrostatic test of this heat exchanger. Therefore, a new type of sealing device for hydrostatic testing of the reducing tee needs to be designed. Utility Model Content

[0003] To address the problem mentioned above that existing water pressure testing methods cannot meet the requirements of reducing tees for water pressure testing, this invention proposes a novel sealing device for reducing tees during water pressure testing. This invention enables the reducing tee to be sealed during water pressure testing of heat exchanger equipment, solving the technical difficulties of scratches and water pressure-induced plugging during installation, thus ensuring product quality.

[0004] This utility model proposes a novel sealing device for a hydrostatic test of a reducing tee, specifically including a hydrostatic plug, an upper pressure plate, a sealing cylinder, and two lower pressure plates. The inner side of the lower end of the sealing cylinder is provided with a chamfered structure and is connected to the upper end of the reducing tee. An upper pressure plate is provided at the upper end of the sealing cylinder. Two lower pressure plates are symmetrically arranged at the bottom of the reducing tee, and the upper pressure plate and the lower pressure plate are connected by bolts. A threaded hole is provided on the upper pressure plate, and a hydrostatic plug is installed in the threaded hole.

[0005] Furthermore, the angle between the beveled surface of the chamfered structure and the vertical direction is 28 degrees.

[0006] Furthermore, a groove is provided on the inclined surface of the chamfered structure, and an inclined sealing ring is provided in the groove.

[0007] Furthermore, the cross-sectional shape of the inclined sealing ring is O-shaped.

[0008] Furthermore, the upper end of the sealing cylinder is provided with an annular groove, and a sealing ring is provided inside the annular groove.

[0009] Furthermore, the sealing ring has an elliptical cross-sectional shape.

[0010] Furthermore, a sealing gasket is provided between the hydraulic plug and the upper surface of the upper pressure plate.

[0011] Furthermore, the lower pressure plate is provided with a groove structure, the cross-section of which is an inverted trapezoid.

[0012] Furthermore, the included angle between the groove walls on both sides of the groove structure is 120 degrees.

[0013] Furthermore, it also includes four double-ended bolts and four nuts. The upper pressure plate has four through holes, and the lower pressure plate has two threaded holes. The lower end of the double-ended bolts is connected to the lower pressure plate through the threaded holes, and the upper end passes through the through holes on the upper pressure plate and is fitted with a nut.

[0014] The beneficial effects of the novel reducing tee water pressure test sealing device described in this utility model are as follows: (1) The novel reducing tee water pressure test sealing device described in this utility model has a simple structure, is easy to operate, improves the work efficiency of workers, and ensures product quality. The chamfered structure at the lower end of the sealing cylinder and the reducing tee pipe opening are matched. Under the tensioning cooperation of the upper and lower pressure plates, the reducing tee is tightened by the inclined sealing ring at the lower end of the sealing cylinder and the sealing ring at the upper end. This solves the technical problem of water pressure indentation of the internal expansion self-clamping water pressure plug and the need to weld water pressure rings for external clamping water pressure tools, which leads to the product surface not meeting the product quality requirements. It ensures a safe working environment and guarantees the production quality and cycle of the product.

[0015] (2) The novel reducing tee water pressure test sealing device described in this utility model uses the groove structure set on the lower pressure plate to assemble and position the reducing tee, ensuring that the upper pressure plate and the upper end face of the sealing cylinder are tightly fitted when the upper pressure plate and the lower pressure plate are tightened by the double-headed bolts and nuts. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0017] In the attached diagram: Figure 1 This is a front view of a novel reducing tee water pressure test sealing device according to this utility model; Figure 2 This is a side view of a novel reducing tee water pressure test sealing device according to the present invention; Figure 3 This is a front view of a novel reducing tee water pressure test sealing device (heat exchanger omitted) according to this utility model; Figure 4This is a top view of a novel reducing tee water pressure test sealing device (heat exchanger omitted) according to this utility model; Figure 5 This is a schematic diagram of the sealing ring structure of a novel reducing tee water pressure test sealing device according to this utility model; Figure 6 This is a schematic diagram of the inclined sealing ring of a novel reducing tee water pressure test sealing device according to this utility model; Among them: 1-double-ended bolt, 2-nut, 3-washer, 4-hydraulic pressure plug, 5-sealing gasket, 6-upper pressure plate, 7-sealing ring, 8-sealing cylinder, 9-sloping sealing ring, 10-lower pressure plate. Detailed Implementation

[0018] The technical solution of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of, and not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] Specific implementation method one: See Figures 1-6This embodiment describes a novel reducing tee water pressure test sealing device, specifically comprising a water pressure plug 4, an upper pressure plate 6, a sealing cylinder 8, and two lower pressure plates 10. The inner side of the lower end of the sealing cylinder 8 has a chamfered structure that meets the beveled surface of the upper end of the reducing tee. The chamfered surface forms a 28-degree angle with the vertical direction, protecting the beveled surface of the reducing tee. A groove is cut into its inner conical surface for installing an O-shaped beveled sealing ring 9, providing initial sealing during water pressure. The upper end of the sealing cylinder 8 has an upper pressure plate 6 and an annular groove containing an elliptical sealing ring 7, providing initial axial sealing during water pressure. As the water pressure increases, the deformation of the beveled sealing ring 9 and the sealing ring 7 increases, resulting in a more reliable seal. The major axis of the elliptical cross-section of the sealing ring 7 is aligned along its axial direction.

[0023] The reducing tee has two symmetrically arranged lower pressure plates 10 at its bottom. The lower pressure plates 10 have a groove structure with an inverted trapezoidal cross-section and a 120-degree included angle between the groove walls on both sides, which is used for the assembly and positioning of the reducing tee. The lower pressure plates 10 are designed in two pieces for easy manufacturing, installation and debugging. The upper pressure plate 6 and the lower pressure plate 10 are connected by four double-ended bolts 1 and four nuts 2. The upper pressure plate 6 has a through hole at each of its four corners, and the lower pressure plate 10 has two threaded holes. The lower end of the double-ended bolt 1 is connected to the lower pressure plate 10 through the threaded hole, and the upper end passes through the through hole on the upper pressure plate 6 and is fitted with a nut 2. A washer 3 is placed between the nut 2 and the upper pressure plate 6.

[0024] An M48 threaded hole is provided at the center of the upper pressure plate 6 for water injection during water pressure and for installing and positioning the water pressure plug 4 or water pressure gauge after water injection. A sealing gasket 5 is provided between the water pressure plug 4 and the upper surface of the upper pressure plate 6. A groove is provided at the center of the upper pressure plate 6, and the sealing gasket 5 is placed in the groove.

[0025] The specific usage process of the novel reducing tee water pressure test sealing device described in this utility model is explained as follows: When the heat exchanger is pressurized by water, first put the inclined sealing ring 9 into the groove of the inner conical surface of the sealing cylinder 8, and then install the whole assembly on the outer wall of the reducing tee. Then install the sealing ring 7 in the annular groove on the upper end face of the sealing cylinder 8 for later use.

[0026] Install the double-ended bolt 1 onto the lower pressure plate 10, then assemble the lower pressure plate 10 with the reducing tee. The other end of the double-ended bolt 1 passes through the upper pressure plate 6 and is assembled and fixed with the nut 2 and washer 3. At this time, the upper pressure plate 6 pre-tightens the sealing ring 7.

[0027] After the overall assembly is completed, water pressure is injected through the M48 threaded hole on the upper pressure plate 6. After the water injection is completed, the water pressure plug 4 and the sealing gasket 5 are installed, and the water pressure conditions are met.

[0028] In summary, the novel reducing tee water pressure test sealing device of this utility model has a simple structure, is easy to operate, improves worker efficiency, and ensures product quality. The chamfered structure at the lower end of the sealing cylinder 8, in conjunction with the reducing tee connector, and under the tensioning action of the upper pressure plate 6 and lower pressure plate 10, utilizes the inclined sealing ring at the lower end and the sealing ring at the upper end of the sealing cylinder 8 to tighten the reducing tee. This solves the technical problems of water pressure indentation in internal expansion self-clamping water pressure plugs and the need to weld water pressure rings in external clamping water pressure tools, which lead to product surface defects that do not meet quality requirements. It ensures a safe working environment and guarantees product production quality and cycle time. The novel reducing tee water pressure test sealing device of this utility model uses a groove structure on the lower pressure plate 10 to assemble and position the reducing tee, ensuring that when the upper pressure plate 6 and lower pressure plate 10 are tightened by the double-ended bolt 1 and nut 2, the upper pressure plate 6 and the upper end face of the sealing cylinder 8 are tightly fitted.

[0029] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit the utility model. They can also be reasonable combinations of the features described in the above embodiments. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel sealing device for hydrostatic testing of a reducing tee, characterized in that: It includes a water pressure plug (4), an upper pressure plate (6), a sealing cylinder (8) and two lower pressure plates (10). The inner side of the lower end of the sealing cylinder (8) is provided with a chamfer structure and is connected to the upper end of the pipe of the reducing tee. The upper end of the sealing cylinder (8) is provided with an upper pressure plate (6). Two lower pressure plates (10) are symmetrically provided at the bottom of the reducing tee. The upper pressure plate (6) and the lower pressure plate (10) are connected by bolts. The upper pressure plate (6) is provided with a threaded hole, and the water pressure plug (4) is installed in the threaded hole.

2. The novel reducing tee water pressure test sealing device according to claim 1, characterized in that: The angle between the beveled surface and the vertical direction of the chamfered structure is 28 degrees.

3. The novel reducing tee water pressure test sealing device according to claim 2, characterized in that: The chamfered structure has a groove on its inclined surface, and an inclined sealing ring (9) is provided in the groove.

4. The novel reducing tee water pressure test sealing device according to claim 3, characterized in that: The inclined sealing ring (9) has an O-shaped cross section.

5. The novel reducing tee water pressure test sealing device according to claim 1, characterized in that: The upper end of the sealing cylinder (8) is provided with an annular groove, and a sealing ring (7) is provided in the annular groove.

6. The novel reducing tee water pressure test sealing device according to claim 5, characterized in that: The sealing ring (7) has an elliptical cross-sectional shape.

7. The novel reducing tee water pressure test sealing device according to claim 1, characterized in that: A sealing gasket (5) is provided between the water pressure plug (4) and the upper surface of the upper pressure plate (6).

8. The novel reducing tee water pressure test sealing device according to claim 1, characterized in that: The lower pressure plate (10) is provided with a groove structure, and the cross section of the groove structure is an inverted trapezoid.

9. The novel reducing tee water pressure test sealing device according to claim 8, characterized in that: The included angle between the groove walls on both sides of the groove structure is 120 degrees.

10. The novel reducing tee water pressure test sealing device according to claim 1, characterized in that: It also includes four double-ended bolts (1) and four nuts (2). The upper pressure plate (6) has four through holes, and the lower pressure plate (10) has two threaded holes. The lower end of the double-ended bolt (1) is connected to the lower pressure plate (10) through the threaded hole, and the upper end passes through the through hole on the upper pressure plate (6) and is provided with nuts (2).

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