Graphite heat exchanger pressure testing device

Abstract

The utility model provides a pressure testing device for a graphite heat exchanger. The pressure testing device comprises a bottom plate, an upper pressing plate, a tension bolt, a plugging flange and a pressure testing water inlet flange, the bottom plate is arranged at the bottom of the graphite heat exchanger, the upper pressing plate is arranged at the top of the graphite heat exchanger, and the bottom plate and the upper pressing plate are in axial sealing connection through the draw-in bolt; the plugging flange is installed at the heating medium inlet end of the graphite heat exchanger in a sealed mode, and the pressure test water inlet flange is arranged at the heating medium outlet end of the graphite heat exchanger. A shell of a traditional graphite heat exchanger is removed, the bottom plate and the upper pressing plate are connected through the tension bolts, the heating medium inlet is plugged through the plugging flange, the pressure test water inlet flange is additionally arranged at the to-be-heated medium outlet, the pressure test process is completed, and the interior of the graphite heat exchanger can be clearly observed; defects of the graphite block and the sealing gasket can be found in time, and repeated disassembly and assembly of leakage points can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger pressure testing technology, and in particular to a graphite heat exchanger pressure testing device. Background Technology

[0002] Graphite heat exchangers are traditional heat transfer devices used in industries such as chemical engineering and metallurgy, and are typically made of high-purity graphite. Graphite possesses resistance to strong acids and alkalis and exhibits excellent thermal conductivity, thus making it widely used in these fields. However, existing pressure testing methods for graphite heat exchangers have some problems. Current pressure testing methods usually involve sealing the heating steam outlet with a blind flange, adding water from the inlet and pressurizing the system, and then observing whether water leaks out from the inlet and outlet of the medium to be heated to determine the airtightness of the graphite heat exchanger.

[0003] This method has the following drawbacks: water leaks are difficult to locate during pressure testing, especially when hidden leaks exist, requiring repeated disassembly and reassembly of the heat exchanger, which is time-consuming and labor-intensive. Due to the obstruction of the outer casing, the specific location of the water leak is difficult to observe, making it impossible to quickly address the leak. Therefore, there is an urgent need for a new device to simplify the pressure testing process of graphite heat exchangers, improve testing efficiency, and accurately locate leaks. Utility Model Content

[0004] The purpose of this invention is to provide a graphite heat exchanger pressure testing device that can clearly and quickly locate the leak point of the heat exchanger, improve the efficiency of pressure testing, and reduce unnecessary disassembly and assembly work.

[0005] According to the purpose of this utility model, this utility model provides a graphite heat exchanger pressure testing device, including a base plate, an upper pressure plate, a tension bolt, a sealing flange, and a test water inlet flange; the base plate is disposed at the bottom of the graphite heat exchanger, the upper pressure plate is disposed at the top of the graphite heat exchanger, and the base plate and the upper pressure plate are axially sealed connected by the tension bolt; the sealing flange is sealed and installed at the heating medium inlet end of the graphite heat exchanger, and the test water inlet flange is disposed at the heating medium outlet end of the graphite heat exchanger.

[0006] Furthermore, the base plate and the upper pressure plate are connected by multiple sets of evenly distributed tension bolts.

[0007] Furthermore, the sealing flange is installed at the heating medium inlet end of the graphite heat exchanger via a sealing gasket.

[0008] Furthermore, the test water inlet flange is connected to a valve.

[0009] Furthermore, a flow meter is installed between the valve and the test water inlet flange.

[0010] Furthermore, the surface of the upper pressure plate is provided with a pressure sensor interface, and a pressure sensor is detachably connected to the pressure sensor interface.

[0011] Furthermore, a support ring is provided annularly at the bottom of the base plate.

[0012] Furthermore, a wing nut is connected to the end of the tensioning bolt, and an elastic washer is provided on the contact surface between the wing nut and the upper pressure plate.

[0013] Furthermore, a reverse check valve is integrated inside the pressure test water inlet flange.

[0014] Furthermore, a pressure relief valve is provided on the top of the sealing flange.

[0015] The technical solution of this utility model removes the shell of the traditional graphite heat exchanger, connects the base plate and the upper pressure plate with tension bolts, seals the heating medium inlet with a sealing flange, and installs a test water inlet flange at the outlet of the medium to be heated to complete the pressure test process. This allows for clear observation of the inside of the graphite heat exchanger, timely detection of defects in graphite blocks and gaskets, and avoids repeated disassembly and assembly of leak points. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 2 This is a cross-sectional view of AA according to an embodiment of the present utility model;

[0019] In the diagram: 1. Base plate; 2. Upper pressure plate; 3. Tightening bolt; 4. Sealing flange; 5. Test water inlet flange; 6. Inlet for heating medium; 7. Outlet for heating medium; 8. Graphite block. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" 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; 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 utility model based on the specific circumstances.

[0023] Example 1

[0024] like Figures 1-2 As shown:

[0025] A pressure testing device for a graphite heat exchanger includes a base plate 1, an upper pressure plate 2, tension bolts 3, a sealing flange 4, and a test water inlet flange 5. The base plate 1 is located at the bottom of the graphite heat exchanger, and the upper pressure plate 2 is located at the top of the graphite heat exchanger, and the base plate 1 and the upper pressure plate 2 are connected by tension bolts 3. Multiple sets of tension bolts 3 are evenly distributed to ensure a good seal between the base plate 1 and the upper pressure plate 2.

[0026] The sealing flange 4 is used to seal the inlet 6 of the graphite heat exchanger for the medium to be heated, and a sealing gasket is used to ensure a tight seal.

[0027] The test water inlet flange 5 is located at the outlet 7 of the medium to be heated in the graphite heat exchanger. A valve is connected to the test water inlet flange 5. The test water inlet flange 5 and the valve together form the test inlet, which can adjust the water flow and pressure. A flow meter is installed between the test water inlet flange 5 and the valve to monitor the flow changes.

[0028] In the internal structure of the graphite heat exchanger, each graphite block 8 is fitted with a sealing gasket and sealed through the stop step of the graphite block 8. Using this device, the sealing effect between the graphite blocks 8 can be visually inspected during pressure testing. Through the improvement of this device, it is possible to more clearly observe the graphite blocks 8 and sealing defects, and promptly address sealing failures caused by excessive pressure.

[0029] Example 2

[0030] This embodiment is basically the same as the structure of embodiment 1. The difference is that in this embodiment, the surface of the upper pressure plate 2 is provided with an interface for connecting a pressure sensor to monitor the pressure changes during the pressure test in real time.

[0031] During the pressure test, the pressure test water inlet flange 5 and valve can be adjusted to adapt to different pressure test requirements.

[0032] In this embodiment, a support ring is also provided on the base plate 1 to stabilize and support the entire pressure testing device and prevent deformation.

[0033] The connection between the tension bolt 3 and the base plate 1 and the upper pressure plate 2 is made of corrosion-resistant material to ensure the durability of the device under high temperature and high pressure environment.

[0034] In this embodiment, a reverse check valve can also be installed inside the test water inlet flange 5 to prevent water from flowing in the reverse direction.

[0035] In the above embodiments, the sealing flange 4 is detachably connected to the base plate 1 by bolts, which facilitates maintenance and replacement.

[0036] In the above embodiment, the tension bolt 3 between the upper pressure plate 2 and the bottom plate 1 is connected by a wing nut, and the contact surface between the wing nut and the upper pressure plate 2 is provided with an elastic washer, which facilitates quick installation and disassembly.

[0037] In the above embodiment, a sealing ring is provided at the interface between the test water inlet flange 5 and the upper pressure plate 2 to prevent water leakage.

[0038] In the above embodiments, a pressure relief valve can also be installed on the sealing flange 4 to automatically release excessive pressure during the pressure test and avoid equipment damage.

[0039] In the above embodiments, a filter device can also be installed on the test water inlet flange 5 to filter impurities in the test water and ensure the long-term use of the device.

[0040] In the above embodiments, the surface of the upper pressure plate 2 is coated with an anti-corrosion layer to ensure the corrosion resistance of the equipment under long-term high-pressure test environment.

[0041] In the above embodiments, the test water inlet flange 5 and the valve are integrated through a design combination to improve sealing and stability.

[0042] In the above embodiments, the test water inlet flange 5 can be adapted to graphite heat exchangers of various sizes, providing more application scenarios.

[0043] When using this utility model, the following steps are included:

[0044] 1. Removing the outer casing: Traditional graphite heat exchanger casings, due to their structural design, easily obscure leak points during pressure testing, making them difficult to observe. This invention removes the outer casing, making the entire pressure testing process more intuitive and clearly displaying leak points.

[0045] 2. Connect the base plate 1 and the upper pressure plate 2 with tension bolts 3: Connect the base plate 1 and the upper pressure plate 2 with tension bolts 3 to ensure sealing and enhance the stability of the structure.

[0046] 3. Sealing the heating medium inlet: The heating medium inlet is sealed with a flange to ensure that test water does not flow into this area, thus preventing the gasket from shifting outward due to excessive pressure. The use of sealing flange 4 ensures that the heating medium inlet does not participate in the pressure test, preventing leakage during the pressure test.

[0047] 4. Install test water inlet flange 5 and valve: Install test water inlet flange 5 and valve at the outlet 7 of the medium to be heated. This structure allows test water to accurately enter the test area, ensuring uniform pressure distribution and thus improving the test effect. During the test, it is possible to detect the outward displacement of the seal between the graphite blocks 8 in real time and take timely corrective measures.

[0048] This invention removes the outer shell of a traditional graphite heat exchanger, connects the base plate 1 to the upper pressure plate 2 using tension bolts 3, seals the heating medium inlet with a sealing flange 4, and installs a test water inlet flange 5 and a valve at the outlet 7 of the medium to be heated to complete the pressure test process. This invention allows for clear observation of the interior of the graphite heat exchanger, timely detection of defects in the graphite blocks 8 and sealing gaskets, and avoids repeated disassembly and reassembly of leak points.

[0049] The pressure testing device of this invention has shown remarkable effectiveness in practical applications. The pressure testing process no longer relies on an outer casing, making it simpler and enabling quick and accurate detection and handling of leaks. By replacing the outer casing with tension bolts 3 and adding a pressure testing water inlet flange 5 and valve, the sealing condition between the graphite blocks 8 can be clearly observed, and timely measures can be taken when the seal fails, greatly improving the success rate and efficiency of the pressure test.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A graphite heat exchanger pressure testing device, characterized in that, It comprises a bottom plate, an upper pressing plate, a tension bolt, a blocking flange and a pressure test water inlet flange; the bottom plate is arranged at the bottom of the graphite heat exchanger, the upper pressing plate is arranged at the top of the graphite heat exchanger, the bottom plate and the upper pressing plate are connected in an axial sealing manner through the tension bolt; the blocking flange is sealingly arranged at the heating medium inlet end of the graphite heat exchanger, and the pressure test water inlet flange is arranged at the heating medium outlet end of the graphite heat exchanger.

2. The graphite heat exchanger pressure testing device of claim 1, wherein, The bottom plate and the upper pressing plate are connected through multiple groups of uniformly distributed tension bolts.

3. The graphite heat exchanger pressure testing device of claim 1, wherein, The blocking flange is sealingly arranged at the heating medium inlet end of the graphite heat exchanger through a sealing gasket.

4. The graphite heat exchanger pressure testing device of claim 1, wherein, The pressure test water inlet flange is connected with a valve.

5. The graphite heat exchanger pressure testing device of claim 4, wherein, A flowmeter is arranged between the valve and the pressure test water inlet flange.

6. The graphite heat exchanger pressure testing device of claim 1, wherein, A pressure sensor interface is arranged on the surface of the upper pressing plate, and a pressure sensor is detachably connected to the pressure sensor interface.

7. The graphite heat exchanger pressure testing device of claim 1, wherein, A support ring is annularly arranged at the bottom of the bottom plate.

8. The graphite heat exchanger pressure testing device of claim 1, wherein, A butterfly nut is connected to the end of the tension bolt, and an elastic gasket is arranged on the contact surface between the butterfly nut and the upper pressing plate.

9. The graphite heat exchanger pressure testing device of claim 1, wherein, A reverse check valve is integrated in the pressure test water inlet flange.

10. The graphite heat exchanger pressure testing device of claim 1, wherein, A pressure release valve is arranged at the top of the blocking flange.

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