Detachable pressure test device for expansion joint

Abstract

The utility model relates to a pressure test device with a detachable expansion joint. The pressure test device comprises a corrugated pipe expansion joint, a sealing mechanism and a water injection and detection mechanism, sealing mechanisms are arranged at the upper end and the lower end of the corrugated pipe expansion joint, a water injection and detection mechanism is arranged on the sealing mechanism located at the upper end of the corrugated pipe expansion joint, and the corrugated pipe expansion joint is detachably connected with the sealing mechanisms. The device meets the test pressure requirement, the structural member of the device has no obvious deformation during the pressure test, the device is sealed without leakage, and the expansion joint safely completes the pressure test inspection; the sealing structure adopts a structure of an upper sealing end cover and a lower sealing end cover and adopts a dual-sealing mechanism of a rectangular sealing ring and a Y-shaped sealing ring; the expansion joint generates pressure thrust when the pressure machine bears a pressure experiment; the operation is simple and convenient, and the device is detachable, welding-free and reusable; and compared with a conventional pressure test mode, the time cost and the personnel cost during the pressure test are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of performance test of pressure pipeline element, concretely relates to a kind of expansion joint detachable pressure test device, belong to the pressure test equipment category in the pressure vessel and pressure pipeline field. BACKGROUND

[0002] Expansion joint as an important pipeline connecting piece plays a key role in industrial production. The stability and reliability of its performance are crucial for the safe operation of the entire pipeline system. Therefore, pressure testing of expansion joint is an important means to ensure its quality. However, traditional pressure test devices often use welding form of structural parts and flange blind plate sealing form. Welding form requires high welding quality, low welding efficiency, long welding time for large diameter expansion joint, long production cycle, and difficult cutting and separation operation after test completion. Flange blind plate sealing form often has thick flange blind plate, long bolt and nut installation time, and difficult sealing control. The existing 60 expansion joints of the same specification and diameter DN3000 need to be pressure tested, so a pressure test device that is easy to operate, detachable, free of welding and reusable is needed to meet the test pressure requirement, ensure sealing without leakage and safely complete pressure test of expansion joint. SUMMARY

[0003] Based on the above technical reasons, the utility model aims to provide an expansion joint detachable pressure test device, mainly used to solve the problems of difficult operation and low efficiency of expansion joint pressure test.

[0004] To achieve the above purpose, the utility model adopts the technical scheme of an expansion joint detachable pressure test device, which includes: a corrugated pipe expansion joint, a sealing mechanism, a water injection and detection mechanism; the upper and lower ends of the corrugated pipe expansion joint are provided with sealing mechanisms, the sealing mechanism at the upper end of the corrugated pipe expansion joint is provided with a water injection and detection mechanism, and the corrugated pipe expansion joint and the sealing mechanism are detachably connected.

[0005] Further, the corrugated pipe expansion joint is arranged in a pressure machine; water is injected into the corrugated pipe expansion joint through the water injection and detection mechanism, and pressure test of the expansion joint is carried out under the pressure action of the pressure machine.

[0006] Further, the corrugated pipe expansion joint includes an upper end pipe, a corrugated pipe and a lower end pipe; one end of the corrugated pipe is connected to one end of the upper end pipe, and the other end of the upper end pipe and the other end of the lower end pipe are connected to the sealing mechanism.

[0007] Further, the sealing mechanism includes an upper sealing assembly and a lower sealing assembly; the upper sealing assembly is connected to the other end of the upper end pipe, and the lower sealing assembly is connected to the other end of the lower end pipe.

[0008] Further, the upper sealing assembly comprises an upper sealing end cover and a sealing ring unit; the lower sealing assembly comprises a lower sealing end cover and a sealing ring unit; the expansion joint is detachably connected with the upper sealing end cover and the lower sealing end cover through the upper end pipe and the lower end pipe respectively;

[0009] Further, grooves are formed in the middle of the lower surface of the upper sealing end cover and the upper surface of the lower sealing end cover, and the upper end pipe and the lower end pipe are respectively inserted into the grooves of the upper sealing end cover and the lower sealing end cover.

[0010] The sizes of the grooves are matched with the outer diameter sizes of the upper end pipe and the lower end pipe, so that the upper end pipe and the lower end pipe can be inserted into the corresponding grooves.

[0011] Further, the sealing ring units in the upper sealing assembly and the lower sealing assembly each comprise a double sealing ring, and the double sealing ring is arranged in the groove of the upper sealing end cover and the lower sealing end cover.

[0012] Further, the double sealing ring comprises a rectangular sealing ring and a Y-shaped sealing ring; the structure of the double sealing ring arranged in the upper sealing end cover is that a first rectangular groove is machined in the circumferential direction at the root of the groove of the upper sealing end cover, and the rectangular sealing ring is installed in the first rectangular groove; a second rectangular groove is machined in the sidewall of the groove of the upper sealing end cover, and the Y-shaped sealing ring is installed in the second rectangular groove.

[0013] Further, the size of the first rectangular groove is consistent with the size of the rectangular sealing ring; the size of the second rectangular groove is consistent with the size of the Y-shaped sealing ring.

[0014] Further, the Y-shaped opening direction of the Y-shaped sealing ring of the second rectangular groove is towards the position of the rectangular sealing ring of the first rectangular groove.

[0015] Further, the structure of the double sealing ring arranged in the lower sealing end cover is completely the same as and symmetrically arranged with the structure of the double sealing ring arranged in the upper sealing end cover.

[0016] The sealing mechanism of the scheme is provided with two seals for expansion joint pressure test; the rectangular sealing rings of the upper sealing assembly and the lower sealing assembly constitute the first seal during the expansion joint pressure test; the Y-shaped sealing rings of the upper sealing assembly and the lower sealing assembly constitute the second seal during the expansion joint pressure test.

[0017] Further, the water injection and detection mechanism is arranged in the upper sealing assembly, a water injection hole is formed in the upper sealing end cover of the upper sealing assembly, a water injection connecting pipe is connected outwardly in the water injection hole, the water injection connecting pipe is connected to a medium source outside, and a valve and a pressure gauge are arranged on the water injection connecting pipe; for controlling the water injection flow and displaying the pressure.

[0018] The main technical requirements of the test device are to meet the test pressure requirements, the device structure has no obvious deformation during pressure test, the device sealing has no leakage, and the expansion joint safely completes the pressure test.

[0019] The specific installation mode of the test device with the above structure in the press is as follows:

[0020] a. First, install the lower sealing assembly: the lower sealing end cover is cut and machined according to the design drawing; the rectangular sealing ring and the Y-shaped sealing ring of the sealing ring unit are installed in the lower sealing end cover in sequence; then the lower sealing end cover is arranged on the working platform of the press, and the centering arrangement is performed; then the lower sealing assembly and the expansion joint are installed: the lower end pipe of the expansion joint is inserted into the groove inside the lower sealing end cover, and the lower end pipe of the expansion joint is in uniform contact with the rectangular sealing ring.

[0021] b. First, install the upper sealing assembly: the upper sealing end cover is cut and machined according to the design drawing; the rectangular sealing ring and the Y-shaped sealing ring of the sealing ring unit are installed in the upper sealing end cover in sequence; then the upper sealing assembly and the expansion joint are installed: the upper end pipe of the expansion joint is inserted into the groove inside the upper sealing end cover, and the upper end pipe of the expansion joint is in uniform contact with the rectangular sealing ring.

[0022] c. Install the water injection and detection mechanism on the upper sealing end cover of the upper sealing assembly, connect the water injection pipe through the water injection hole on the upper sealing end cover, and install the valve and pressure gauge; the upper operating platform of the press is adjusted to the position in contact with the upper sealing end cover, and the installation of the entire test device is completed, and the pressure test of the expansion joint is started.

[0023] The beneficial effects of the expansion joint detachable pressure test device adopting the scheme are as follows:

[0024] The device meets the test pressure requirements, the device structure has no obvious deformation during pressure test, the device sealing has no leakage, and the expansion joint safely completes the pressure test; the sealing structure adopts the structure of the upper sealing end cover and the lower sealing end cover, and adopts the double sealing mechanism of the rectangular sealing ring and the Y-shaped sealing ring; the press bears the pressure generated by the expansion joint during the pressure test; the operation is simple and convenient, the device can be detached without welding and can be reused; compared with the conventional pressure test mode, the time cost and personnel cost during the pressure test are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a kind of expansion joint detachable pressure test device of the utility model.

[0026] Figure 2 It is a partial enlarged view.

[0027] In the figure, 1, bellows expansion joint, 1.1, upper end pipe, 1.2, bellows, 1.3, lower end pipe, 2, upper sealing end cover, 3, lower sealing end cover, 4, upper rectangular sealing ring, 5, upper Y-shaped sealing ring, 6, lower rectangular sealing ring, 7, lower Y-shaped sealing ring, 8, water injection connector, 9, valve, 10, pressure gauge, 11, working platform of the press, 12, upper operating platform of the press. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purpose, features and advantages of the utility model more apparent, obvious and easy to understand, the specific embodiments of the utility model are described in detail below in combination with the drawings. In the following description, a large number of specific details are set forth in order to fully understand 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 departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0029] As shown in Figure 1 , 2 An expansion joint detachable pressure test device, which comprises a bellows expansion joint 1, a sealing mechanism, a water injection and detection mechanism; the upper and lower ends of the bellows expansion joint 1 are provided with the sealing mechanism, the sealing mechanism on the upper end of the bellows expansion joint 1 is provided with the water injection and detection mechanism, and the bellows expansion joint 1 and the sealing mechanism are detachably connected;

[0030] The bellows expansion joint 1 is arranged in a press; water is injected into the bellows expansion joint 1 through the water injection and detection mechanism, and the expansion joint is subjected to pressure test under the pressure action of the press;

[0031] The bellows expansion joint 1 comprises an upper end pipe 1.1, a bellows 1.2 and a lower end pipe 1.3; the upper end of the bellows 1.2 is connected with one end of the upper end pipe 1.1, and the lower end of the bellows 1.2 is connected with one end of the lower end pipe 1.3; the other end of the upper end pipe 1.1 and the other end of the lower end pipe 1.3 are connected with the sealing mechanism;

[0032] The sealing mechanism comprises an upper sealing assembly and a lower sealing assembly; the upper sealing assembly is connected with the other end of the upper end pipe 1.1, and the lower sealing assembly is connected with the other end of the lower end pipe 1.3;

[0033] The upper sealing assembly comprises an upper sealing end cover 2 and a sealing ring unit; the lower sealing assembly comprises a lower sealing end cover 3 and a sealing ring unit; the bellows expansion joint 1 is detachably connected with the upper sealing end cover 2 and the lower sealing end cover 3 through the upper end pipe 1.1 and the lower end pipe 1.3 in a plug-in manner;

[0034] The upper sealing end cover 2 lower surface, the lower sealing end cover 3 upper surface are all provided with recesses, and the upper end pipe 1.1 and the lower end pipe 1.2 are respectively inserted into the recesses of the upper sealing end cover 2 and the lower sealing end cover 3.

[0035] The sizes of the recesses are matched with the outer diameter sizes of the upper end pipe 1.1 and the lower end pipe 1.3, so that the upper end pipe 1.2 and the lower end pipe 1.3 can be inserted into the corresponding recesses.

[0036] The sealing ring units in the upper sealing assembly and the lower sealing assembly all include double sealing rings, and the double sealing rings are arranged in the recesses of the upper sealing end cover 2 and the lower sealing end cover 3.

[0037] The double sealing ring includes a rectangular sealing ring and a Y-shaped sealing ring; the structure of the double sealing ring arranged in the upper sealing end cover 2 is that a first rectangular groove is machined in the circumferential direction at the root of the recess of the upper sealing end cover 2, and the rectangular sealing ring is arranged in the first rectangular groove; a second rectangular groove is machined in the circumferential direction at the side wall of the recess of the upper sealing end cover 2, and the Y-shaped sealing ring is arranged in the second rectangular groove.

[0038] The size of the first rectangular groove is consistent with the size of the rectangular sealing ring; and the size of the second rectangular groove is consistent with the size of the Y-shaped sealing ring.

[0039] The Y-shaped opening direction of the Y-shaped sealing ring of the second rectangular groove is towards the position of the rectangular sealing ring of the first rectangular groove.

[0040] The rectangular sealing ring mentioned above is an upper rectangular sealing ring 4, and the Y-shaped sealing ring is an upper Y-shaped sealing ring 5.

[0041] The structure of the double sealing ring arranged in the lower sealing end cover 3 is completely the same as and symmetrically arranged with the structure of the double sealing ring arranged in the upper sealing end cover 2. The rectangular sealing ring involved in the structure of the lower sealing end cover 3 is a lower rectangular sealing ring 6, and the Y-shaped sealing ring is a lower Y-shaped sealing ring 7.

[0042] Two seals for expansion joint pressure test are arranged in the sealing mechanism of the scheme; the rectangular sealing rings (4, 6) of the upper sealing assembly and the lower sealing assembly constitute the first seal during the expansion joint pressure test; and the Y-shaped sealing rings (5, 7) of the upper sealing assembly and the lower sealing assembly constitute the second seal during the expansion joint pressure test.

[0043] The water injection and detection mechanism is arranged in the upper sealing assembly, a water injection hole is arranged in the upper sealing end cover 2 of the upper sealing assembly, a water injection connecting pipe 8 is connected to the outside of the water injection hole, the water injection connecting pipe 8 is connected to a medium source outside, a valve 9 and a pressure gauge 10 are arranged on the water injection connecting pipe 8, and the valve 9 and the pressure gauge 10 are used for controlling the water injection flow and displaying the pressure.

[0044] In this embodiment, the specific installation mode of the test device in the press is as follows:

[0045] a, first, the lower sealing assembly is installed: the lower sealing end cover 3 is cut and machined according to the design drawing; the lower rectangular sealing ring 6 and the lower Y-shaped sealing ring 7 of the sealing ring unit are installed in the lower sealing end cover 3 in sequence; then the lower sealing end cover 3 is installed on the working platform 11 of the press, and the centering arrangement is performed; then the lower sealing assembly and the expansion joint are installed: the lower end pipe 1.3 of the expansion joint is inserted into the groove inside the lower sealing end cover 3, and the lower end pipe 1.3 of the expansion joint is in uniform contact with the lower rectangular sealing ring 6;

[0046] b, first, the upper sealing assembly is installed: the upper sealing end cover 2 is cut and machined according to the design drawing; the upper rectangular sealing ring 4 and the upper Y-shaped sealing ring 5 of the sealing ring unit are installed in the upper sealing end cover 2 in sequence; then the upper sealing assembly and the expansion joint are installed: the upper end pipe 1.1 of the expansion joint is inserted into the groove inside the upper sealing end cover 2, and the upper end pipe 1.1 of the expansion joint is in uniform contact with the upper rectangular sealing ring 4;

[0047] c, the water injection and detection mechanism is installed on the upper sealing end cover 2 of the upper sealing assembly, the water injection pipe 8 is connected through the water injection hole on the upper sealing end cover 2, and the valve 9 and the pressure gauge 10 are installed; the upper operating platform 12 of the press is adjusted to the position in contact with the upper sealing end cover and is fixed, the installation of the entire test device is completed, and the pressure test of the expansion joint is started.

[0048] The main technical requirement of the test device is to meet the test pressure requirement, the device structure has no obvious deformation during the pressure test, the device sealing has no leakage, and the expansion joint safely completes the pressure test.

[0049] In the description of the utility model, it should be understood that the directions or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0050] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Thus, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0051] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be indirectly contacted through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0053] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only embodiment.

Claims

1. A detachable pressure testing device for an expansion joint, characterized by, Include: The corrugated pipe expansion joint, sealing mechanism, water injection and detection mechanism, the upper and lower ends of the corrugated pipe expansion joint are provided with sealing mechanism, the sealing mechanism on the upper end of the corrugated pipe expansion joint is provided with water injection and detection mechanism, the corrugated pipe expansion joint and the sealing mechanism are detachable connection.

2. The detachable pressure testing device of claim 1, wherein: The corrugated pipe expansion joint includes an upper end pipe, a corrugated pipe and a lower end pipe, the upper end of the corrugated pipe is connected with one end of the upper end pipe, the lower end of the corrugated pipe is connected with one end of the lower end pipe, the other end of the upper end pipe and the other end of the lower end pipe are connected with the sealing mechanism.

3. The expandable joint pressure test device of claim 2, wherein The sealing mechanism includes an upper sealing assembly and a lower sealing assembly, the upper sealing assembly is connected with the other end of the upper end pipe, and the lower sealing assembly is connected with the other end of the lower end pipe.

4. The expandable section detachable pressure testing device of claim 3, wherein The upper sealing assembly includes an upper sealing end cover and a sealing ring unit, the lower sealing assembly includes a lower sealing end cover and a sealing ring unit, the expansion joint is detachably connected with the upper sealing end cover and the lower sealing end cover through the upper end pipe and the lower end pipe.

5. The expandable section detachable pressure testing device of claim 4, wherein The lower surface of the upper sealing end cover and the upper surface of the lower sealing end cover are provided with grooves, and the upper end pipe and the lower end pipe are inserted into the grooves of the upper sealing end cover and the lower sealing end cover respectively.

6. A pressure test device for a detachable expansion joint according to claim 5, characterized in that The sealing ring unit in the upper sealing assembly and the lower sealing assembly includes double sealing rings, and the double sealing rings are arranged in the grooves of the upper sealing end cover and the lower sealing end cover.

7. A pressure test device for a detachable expansion joint according to claim 6, characterized in that The double sealing ring includes a rectangular sealing ring and a Y-shaped sealing ring, the structure of the double sealing ring arranged in the upper sealing end cover is that a first rectangular groove is machined in the circumferential direction at the root of the groove of the upper sealing end cover, and a rectangular sealing ring is installed in the first rectangular groove, a second rectangular groove is machined in the side wall of the groove of the upper sealing end cover, and a Y-shaped sealing ring is installed in the second rectangular groove.

8. The expandable section detachable pressure testing device of claim 7, wherein The size of the first rectangular groove is consistent with the size of the rectangular sealing ring, and the size of the second rectangular groove is consistent with the size of the Y-shaped sealing ring.

9. The expandable section pressure testing device of claim 7, wherein The Y-shaped opening direction of the Y-shaped sealing ring of the second rectangular groove is towards the position of the rectangular sealing ring of the first rectangular groove.

10. The expandable section pressure testing device of claim 6, wherein The structure of the double sealing ring arranged in the lower sealing end cover is completely the same as the structure of the double sealing ring arranged in the upper sealing end cover and is arranged in mirror symmetry.

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