Safety valve testing device

Abstract

The utility model relates to the technical field of ship boiler high-pressure valve test, in particular to a safety valve test device, which comprises a base, a support upright post, a test bed plate and a fixing assembly, and is characterized in that the base is of a rectangular structure formed by welding four channel steels in a surrounding manner; the number of the supporting stand columns is four, and the supporting stand columns are arranged at the four corners of the base correspondingly. The test bed plate is of a square structure and is arranged at the top of the supporting stand column, a placement space is formed between the test bed plate and the base, a high-pressure nitrogen cylinder is placed in the placement space, and long-strip-shaped holes which are concentrically distributed at equal intervals are formed in the outer sides of diagonal lines of the four corners of the test bed plate; the fixing assembly comprises a pressing plate, a support and a connecting piece, the support is arranged on the test bed plate, one end of the pressing plate abuts against the safety valve to be tested, the other end of the pressing plate abuts against the support, and the connecting piece penetrates through the long-strip-shaped hole and is connected with the pressing plate and the test bed plate. The safety valve test device is simple in structure and high in universality, safety valves with different drift diameters and pressure grades can be conveniently detected, and the detection efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ship boiler high pressure valve test, specifically relates to a safety valve testing device. BACKGROUND

[0002] With the international society's demand for green, environmental protection, clean new energy rising unceasingly, LNG as one of the representatives of clean energy, has obtained the powerful development, and the LNG ship that is matched with it in the shipping market quantity is also more and more. And most LNG ships use high-pressure boilers and steam as the main driving force of the ship. As the key core equipment of LNG transport ship power, the steam temperature can reach 550 DEG C, the working pressure can reach 65bar, and the working pressure of some exhaust gas boilers is higher, up to 110bar. The boiler safety valve is an important safety component of high-pressure boiler, and the system will not be damaged due to excessive pressure, so regular maintenance and maintenance are required, and it is also a must-check item in LNG ship dock repair engineering.

[0003] During the LNG ship dock repair, the high-pressure safety valve of the boiler is removed first, then the boiler system is stopped, depressurized and cooled, and then the safety valve is removed and hoisted into the material frame, and then it is transported back to the workshop for disassembly, grinding, assembly, special blind plate manufacturing, high-pressure nitrogen pressure testing, etc. However, due to the different manufacturers, brands, diameters, pressure grades of the high-pressure safety valve of the boiler, there are many types and flange interface sizes, so each time the test blind plate needs to be measured and customized, and then welded and fixed on the test jig, which has the problems of repeated labor, low efficiency and resource waste. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a safety valve testing device, which can quickly test the pressure of various safety valves with different diameters and pressure grades to solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides a safety valve testing device, which comprises a base, a supporting column, a test table plate and a fixing assembly. The base is composed of four channel steels welded together to form a rectangular structure. The supporting column is four in number and is arranged at the four corners of the base. The test table plate is in a square structure and is arranged on the top of the supporting column. There is a space between the test table plate and the base for placing a high-pressure nitrogen cylinder. Long strip-shaped holes are arranged on the outer side of the diagonal lines of the four corners of the test table plate in a concentric and equidistant manner. The fixing assembly comprises a pressing plate, a support and a connecting piece. The support is arranged on the test table plate. One end of the pressing plate abuts against the safety valve to be tested, and the other end abuts against the support. The connecting piece passes through the long strip-shaped hole and connects the pressing plate and the test table plate.

[0006] Further, the pressing plate comprises a first end and a second end, the first end is provided with a first toothed surface, the support is provided with a second toothed surface, the first toothed surface abuts against the second toothed surface, and the second end abuts against the safety valve to be tested.

[0007] Further, the first toothed surface and the second toothed surface are both straight-angled meshing surfaces arranged uniformly at equal distances.

[0008] Further, the pressing plate is provided with a connecting hole, the connecting member comprises a connecting bolt and a connecting nut, and the connecting bolt is locked and connected with the connecting nut after penetrating through the connecting hole and the long strip-shaped hole.

[0009] Further, the connecting hole is a waist-shaped hole.

[0010] Further, the support is provided with a lightening hole, and / or the second end of the pressing plate is provided with a lightening inclined surface.

[0011] Further, the placing space is provided with a supporting seat, and the high-pressure nitrogen gas cylinder is placed on the supporting seat.

[0012] Further, the safety valve testing device further comprises a supporting plate and an auxiliary column, the bottom of the auxiliary column is fixed on the base, the supporting plate is fixed on the top of the auxiliary column, and the supporting plate is located on one side of the testing plate.

[0013] Further, an angle steel is connected at the connection between the supporting column and the testing plate.

[0014] Further, a plurality of sealing grooves with different diameters and arranged in concentric circles are arranged at the central position of the testing plate.

[0015] The safety valve testing device has the advantages that:

[0016] 1. During use, the positions of the pressing plate, the support and the connecting member are adjusted radially according to the sizes of the flanges of the safety valves to be tested with different diameters, until one end of the pressing plate abuts against and completely presses the flange face of the safety valve to be tested, the other end abuts against the support, then the connecting member is locked, so that the safety valve to be tested is fixed on the testing plate, and finally the high-pressure nitrogen gas cylinder is connected, and the safety valve to be tested is detected.

[0017] 2. The pressure plate includes a first end and a second end. The first end has a first meshing surface, and the support has a second meshing surface. The first meshing surface abuts against the second meshing surface, and the second end abuts against the safety valve to be tested. The positions of the pressure plate and the support can be adjusted according to the thickness of the flange of the safety valve to be tested. The first and second meshing surfaces are adjusted up and down until the pressure plate completely presses the safety valve to be tested onto the test bench.

[0018] 3. The pressure plate has connecting holes. The connecting parts include connecting bolts and connecting nuts. The connecting bolts pass through the connecting holes and the elongated holes and are then locked with the connecting nuts. The connecting holes are oblong-shaped to facilitate the adjustment of the connecting bolt position.

[0019] 4. The safety valve testing device also includes a support plate and an auxiliary column. The bottom of the auxiliary column is fixed to the base, and the support plate is fixed to the top of the auxiliary column. The support plate is located on one side of the test bench. The support plate is made of stainless steel sheet, which is cut, pressed, and then welded to serve as a workbench for holding the test instruments. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A front view of a safety valve testing device provided in an embodiment of this utility model;

[0022] Figure 2 A top view of a safety valve testing device provided in an embodiment of this utility model;

[0023] Figure 3 A side view of a safety valve testing device provided in an embodiment of this utility model;

[0024] Figure 4 A side view of the test bench used in a safety valve testing device provided in an embodiment of this utility model;

[0025] Figure 5 A schematic diagram of the usage state of a safety valve testing device provided in an embodiment of this utility model;

[0026] Figure 6 for Figure 5 Enlarged view of section A;

[0027] Figure 7 A side view of the pressure plate used in a safety valve testing device provided in an embodiment of this utility model;

[0028] Figure 8 The utility model provides a kind of safety valve test device of the utility model embodiment provides the plan view of the pressing plate used.

[0029] Mark for explanation:

[0030] 1, base;2, support column;3, test table plate;31, long strip hole;32, sealing groove;4, placement space;41, support seat;5, high-pressure nitrogen cylinder;6, fixed assembly;61, pressing plate;611, first end;612, second end;613, first tooth surface;614, connecting hole;615, inclined surface;62, support;621, second tooth surface;622, lightening hole;63, connecting piece;631, connecting bolt;632, connecting nut;633, connecting gasket;7, safety valve to be measured;8, supporting plate;9, auxiliary column. Specific implementation

[0031] The technical scheme of the utility model will be described clearly and completely below in conjunction with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0032] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, so it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0034] In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0035] Refer toFigures 1 to 8 The utility model provides a kind of safety valve testing device, including pedestal 1, support column 2, test bench plate 3 and fixed assembly 6, pedestal 1 is by four channel steel welding and is made into rectangle structure;Support column 2 is four, respectively is located in the four corner positions of pedestal 1;Test bench plate 3 is square structure, is located in the top of support column 2, there is placement space 4 between test bench plate 3 and pedestal 1, high-pressure nitrogen cylinder 5 is placed in placement space 4, and the outside of the diagonal of the four corners of test bench plate 3 is equipped with concentric equidistant distribution's long strip hole 31;Fixed assembly 6 includes pressing plate 61, support 62 and connecting piece 63, support 62 is equipped on test bench plate 3, pressing plate 61 one end is abutted on the safety valve 7 to be measured, the other end is abutted on support 62, and connecting piece 63 passes through long strip hole 31 and is connected pressing plate 61 and test bench plate 3.

[0036] When using, according to the size of the flange of the safety valve 7 to be measured of different pass, the positions of the pressing plate 61, the support 62 and the connecting piece 63 are adjusted radially respectively until the one end of the pressing plate 61 abuts and completely presses the flange face of the safety valve 7 to be measured, the other end abuts on the support 62, then the connecting piece 63 is locked, so that the safety valve 7 to be measured is fixed on the test bench plate 3. Finally, the high-pressure nitrogen cylinder 5 is connected, and the safety valve 7 to be measured is detected. The safety valve testing device in the application has the advantages of simple structure, convenient manufacturing and assembly, strong universality, convenient detection of safety valves of different pass and pressure grade, and greatly improved detection efficiency.

[0037] Specifically, the pressing plate 61 includes a first end 611 and a second end 612, the first end 611 is provided with a first toothed surface 613, the support 62 is provided with a second toothed surface 621, the first toothed surface 613 abuts the second toothed surface 621, and the second end 612 abuts on the safety valve 7 to be measured. The first toothed surface 613 and the second toothed surface 621 are both straight-angle meshing surfaces arranged uniformly at equal distances. The positions of the pressing plate 61 and the support 62 can be adjusted according to the thickness of the flange of the safety valve 7 to be measured, the first toothed surface 613 and the second toothed surface 621 are adjusted up and down until the pressing plate 61 completely presses the safety valve 7 to be measured on the test bench plate 3. The pressing plate 61 is provided with a connecting hole 614, the connecting piece 63 includes a connecting bolt 631 and a connecting nut 632, the connecting bolt 631 passes through the connecting hole 614 and the long strip hole 31 and is locked and connected with the connecting nut 632. In the embodiment, the connecting hole 614 is a waist-shaped hole, which facilitates the position adjustment of the connecting bolt 631. The connecting piece 63 further includes a connecting gasket 633, the connecting gasket 633 is sleeved on the connecting bolt 631, and plays a adjusting role in the installation of the connecting bolt 631.

[0038] Further, the support 62 is provided with a lightening hole 622 to reduce the overall weight of the support 62. And / or the second end 612 of the pressing plate 61 is provided with a lightening inclined surface 615.

[0039] Specifically, the support 62 is in the form of a wedge-shaped block, and a second toothed surface 621 is formed on the normal oblique edge surface of the support 62, the second toothed surface 621 being a straight-angled meshing surface arranged at equal intervals. An oblique surface 615 of a first end 611 of the pressing plate 61 is provided with a first toothed surface 613, the first toothed surface 613 being a straight-angled meshing surface arranged at equal intervals. The first toothed surface 613 can abut against the second toothed surface 621. An oblique surface 615 is formed on a second end 612 of the pressing plate 61 for lightening the overall weight of the pressing plate 61. The test bench plate 3 is made of a stainless steel plate with a thickness of 40 mm, and the upper surface is smooth and flat. A plurality of sealing grooves 32 with different diameters and arranged in concentric circles are arranged at the center of the test bench plate 3. The center lines of the sealing grooves 32 are respectively adapted to the flange surface sealing lines of DN25-DN150 high-pressure safety valves; and four long strip-shaped holes 31 arranged at equal intervals are respectively milled on the outer sides of the opposite diagonal lines of the four corners of the test bench plate 3, for adapting to the flange fixing of safety valves 7 with different diameters.

[0040] Further, the safety valve test device further comprises a supporting plate 8 and an auxiliary column 9, the bottom of the auxiliary column 9 is fixed on the base 1, and the supporting plate 8 is fixed on the top of the auxiliary column 9, and the supporting plate 8 is located on one side of the test bench plate 3.

[0041] Specifically, the base 1 is a rectangular structural member welded by four channel steels, and the openings of the channel steels are all downwardly arranged, which can be used for overall transfer by a forklift. The pressure test side of the base 1 is supported by four seamless steel pipes as support columns 2, which respectively support the upper test bench plate 3, and angle steels are connected at the connection positions of the support columns 2 and the test bench plate 3, which play a role in strengthening and stabilizing. The auxiliary side of the base 1 is supported by two seamless steel pipes as auxiliary columns 9, and the top of the auxiliary columns 9 is welded and fixed with a supporting plate 8, and angle steels are connected at the connection positions of the auxiliary columns 9 and the supporting plate 8, which play a role in strengthening and stabilizing. The supporting plate 8 is square, and is made of a stainless steel sheet after blanking and pressing, and is welded to serve as a workbench for holding test instruments. The test bench plate 3 and the supporting plate 8 are below a placing space 4, and the placing space 4 is provided with a support seat 41, and a high-pressure nitrogen cylinder 5 is placed on the support seat 41. The support seat 41 is made of two U-shaped pipes and angle steel supports, and the angle steel supports are welded and fixed at both ends on the base 1, and the high-pressure nitrogen cylinder 5 is horizontally placed on the support seat 41. The high-pressure nitrogen cylinder 5 is isolated from the U-shaped pipes and the angle steel supports by fluorine rubber pads.

[0042] The safety valve test device in the embodiment is used as follows:

[0043] ① Clean the surface of the test bench plate 3. Select and install a matching sealing groove 32 according to the size of the sealing surface of the flange of the safety valve 7 to be tested. Lift the safety valve 7 to be tested and clean the sealing surface of the lower flange of the safety valve 7. Slowly lower the safety valve 7 to be tested onto the test bench plate 3 and adjust the center of the lower flange of the safety valve 7 to be basically aligned with the center of the test bench plate 3.

[0044] ② Adjust the pressure plate 61, support 62 and connector 63 radially until the second end 612 of the four pressure plates 61 completely presses the flange face of the safety valve 7 to be tested. Adjust the first toothed surface 613 and the second toothed surface 621 up and down according to the flange thickness of the safety valve 7 to be tested until the pressure plate 61 completely presses the safety valve 7 to be tested on the test bench plate 3.

[0045] ③ Connect the test pipeline to the high-pressure nitrogen cylinder 5 for testing. Slowly open the switch valve of the nitrogen cylinder and adjust the nitrogen pressure reducing valve until the output pressure is about 20% higher than the design set pressure of the safety valve. Manually and slowly open the valve of the test pipeline slightly while observing the change in the reading of the test pressure gauge. Stop when the test pressure is close to the working pressure of the safety valve 7 to be tested. Hold the pressure for 5 minutes and check to confirm that the tightness of the test pipeline, the tightness of the flange sealing surface of the safety valve, and the tightness of the valve disc and valve seat sealing surface are all in good condition.

[0046] ④ Install a sealing plug and a test pipeline at the flange port of the outlet end of the safety valve 7 to be tested. Insert one end of the test pipeline into the sealing plug and the other end into the water in a small transparent bottle. By observing the bubbling, check and confirm the tightness of the sealing surface between the valve disc and the valve seat of the safety valve 7 to be tested.

[0047] ⑤ Continue to manually and slowly open the valves of the test pipeline, while observing the changes in the pressure gauge reading until bubbles just begin to appear in the small transparent bottle. Record the pressure gauge reading at this point (i.e., the actual set pressure). Continue observing until the bubbles stop appearing in the small transparent bottle, and record the pressure gauge reading again (i.e., the actual reseating pressure). Repeat the test 2 to 3 times, recording and confirming whether the actual set pressure and the actual reseating pressure are within the error range. If the test pressure is found to be lower or higher than the set pressure, causing the safety valve to leak, readjust the compression spring adjusting bolt of the safety valve and repeat the pressure test 2 to 3 times until the specifications are met, and record the results. Similarly, if the closing pressure is found to exceed the reseating pressure range, readjust the reseating pressure adjusting ring of the safety valve and repeat the pressure test 2 to 3 times until the specifications are met, and record the results. Tighten the lock nuts and locking screws of the adjusting bolts on the safety valve 7 under test, and seal them. Then report to the ship inspector and ship surveyor for an inspection report.

[0048] ⑥, close high pressure nitrogen cylinder 5 total valve, pipeline slowly to zero, remove the pipeline, remove the tool. Hoist the safety valve, do a good job of packaging protection from the outside of the import and export flange with plastic film. Put into the material frame, crane installation. Thus complete the entire test process of the safety valve 7 to be tested.

[0049] The safety valve test device in the embodiment can adjust the positions of the pressing plate 61, the support 62 and the connecting piece 63 in the radial direction according to the sizes of the flanges of the safety valve 7 to be tested of different diameters, until one end of the pressing plate 61 abuts against and completely presses the flange surface of the safety valve 7 to be tested, the other end abuts against the support 62, then the connecting piece 63 is locked, so that the safety valve 7 to be tested is fixed on the test platform 3. Finally, the high-pressure nitrogen cylinder 5 is connected, and the safety valve 7 to be tested is detected. The safety valve test device in the application has the advantages of simple structure, convenient fabrication and assembly, strong universality, convenience in detecting safety valves of different diameters and pressure grades, and greatly improved detection efficiency.

[0050] The embodiments of the specific embodiment are the preferred embodiments of the utility model, and are not limited to the protection scope of the utility model, so that: equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A safety valve testing apparatus, characterized by, The utility model relates to a safety valve test bench, including: Base (1) is surrounded by four channel steel welding and is connected into a rectangular structure; Support column (2) is four, and is arranged respectively in four corner positions of base (1); Test bench plate (3) is square structure, is located in the top of support column (2), and there is placing space (4) between test bench plate (3) and base (1), high-pressure nitrogen cylinder (5) is placed in placing space (4), and the outside of the diagonal of four corners of test bench plate (3) is provided with concentric equidistant distribution long strip hole (31); Fixing assembly (6) includes pressing plate (61), support (62) and connecting piece (63), support (62) is arranged on test bench plate (3), one end of pressing plate (61) is abutted on safety valve (7) to be measured, the other end is abutted on support (62), connecting piece (63) passes through long strip hole (31) and connects pressing plate (61) and test bench plate (3).

2. The safety valve testing device of claim 1, wherein The utility model discloses a safety valve test bench, including:

3. The safety valve testing apparatus of claim 2, wherein The first end (611) is equipped with the first tooth surface (613), and the support (62) is equipped with the second tooth surface (621), and the first tooth surface (613) is abutted on the second tooth surface (621), and the second end (612) is abutted on safety valve (7) to be measured.

4. The safety valve testing device of claim 1, wherein, The first tooth surface (613) and the second tooth surface (621) are all equidistantly and uniformly arranged right-angle engaging surfaces.

5. The safety valve testing apparatus of claim 4, wherein, Connecting hole (614) is equipped on pressing plate (61), connecting piece (63) includes connecting bolt (631) and connecting nut (632), and connecting bolt (631) passes through connecting hole (614) and long strip hole (31) and is locked with connecting nut (632) connection.

6. The safety valve testing apparatus of claim 2, wherein The connecting hole (614) is a waist type hole.

7. The safety valve testing apparatus of claim 1, wherein The support (62) is provided with a lightening hole (622), and / or the second end (612) of the pressing plate (61) is provided with a lightening inclined surface (615).

8. The safety valve testing device of claim 1, wherein, The placing space (4) is provided with a supporting seat (41), and the high-pressure nitrogen cylinder (5) is placed on the supporting seat (41).

9. The safety valve testing device of claim 1, wherein, It further includes a supporting plate (8) and an auxiliary column (9), the bottom of the auxiliary column (9) is fixed on the base (1), the supporting plate (8) is fixed on the top of the auxiliary column (9), and the supporting plate (8) is located on one side of the test bench plate (3).

10. The safety valve testing device of claim 1, wherein, The support column (2) is connected with the angle steel at the connection with the test bench plate (3). The test bench plate (3) is provided with a plurality of sealing grooves (32) with different diameters and arranged in concentric circles at the central position.

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