Improved sealing tool for tube head pressure test of floating head heat exchanger

Abstract

The utility model discloses a floating head heat exchanger tube head pressure test improved sealing tool which comprises a first pressure test flange, one side of the first pressure test flange is fixedly connected with a second pressure test flange, and one side of the first pressure test flange is connected with a shell connecting flange through a first bolt and a first nut. One side of the second pressure test flange is connected with a compression flange through a second bolt and a second nut, a packing seal is arranged in the second pressure test flange, one side of the packing seal is beveled into 45 degrees, and the angle of the end face of the compression flange is 45 degrees. The 45-degree pressing force can be decomposed into axial pressing force and radial pressing force. The axial pressing force can ensure that the filler is stressed in the longitudinal direction, the longitudinal pressing force enables the filler to expand in the radial direction, the radial pressing force enables the filler to be attached to the outer diameter of the floating head more tightly, therefore, more effective sealing is achieved, and in addition, the connecting mode is simple and reliable, and rapid mounting and dismounting are convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger technical field, specifically, relate to a kind of floating head heat exchanger pipe head pressure test improved sealing tooling. BACKGROUND

[0002] Floating head heat exchanger as an important pressure vessel is widely used in petroleum, chemical industry, food, metallurgy and other industries. These industries have strict requirements on the performance and safety of equipment. According to the provisions of national standard GB / T151, the design and manufacture of floating head heat exchanger must comply with specific technical specifications. Among them, the standard clearly stipulates that after completing the welding process of floating head tube plate and heat exchange tube, the shell must be strictly tested by water pressure. The main purpose of this test is to detect whether there are potential defects in the shell weld, and to check whether the pipe head weld between the heat exchange tube and the floating head tube plate is intact.

[0003] The traditional pressure testing device adopts a conical tooling body. This tooling body plays a sealing role in the pressure testing process, ensuring the effectiveness of the water pressure test. However, this method has obvious shortcomings. First of all, the installation and disassembly process of the conical tooling body is very complex, requiring a lot of manpower and time. And when using regular-shaped packing compression surface in the pressure testing tooling, there is a sealing problem of floating head heat exchanger pipe head pressure testing tooling under different pressure test pressures. The traditional regular-shaped packing compression surface design cannot effectively meet the sealing requirements under different pressures, which may cause leakage in high-pressure environment, seriously affecting the reliability and safety of the water pressure test.

[0004] At present, there is no effective solution to the problems in the related technology. UTILITY MODEL CONTENTS

[0005] In view of the problems in the related technology, the utility model provides a floating head heat exchanger pipe head pressure test improved sealing tooling to overcome the above technical problems existing in the prior art.

[0006] Therefore, the utility model adopts the following specific technical solutions:

[0007] A floating head heat exchanger pipe head pressure test improved sealing tooling, comprising a pressure testing flange one, a pressure testing flange two fixedly connected to one side of the pressure testing flange one, a shell connecting flange provided on one side of the pressure testing flange one, a compression flange provided on one side of the pressure testing flange two, and a packing seal filled in the pressure testing flange two, wherein the neck end face angle of the compression flange is 45°.

[0008] Further, a first gasket is provided between the pressure testing flange one and the shell connecting flange.

[0009] Further, the test pressure flange one and the shell connecting flange are connected through the first bolt, and one end of the first bolt is threadedly connected with the first nut.

[0010] Further, the test pressure flange two and the pressing flange are connected through the second bolt, and one end of the second bolt is threadedly connected with the second nut.

[0011] Further, the test pressure flange one is fixedly connected with the connecting pipe, one end of the connecting pipe is provided with the first connecting flange, the upper side of the first connecting flange is provided with the lower clamping device, the upper side of the lower clamping device is provided with the bursting disc, the upper side of the bursting disc is provided with the upper clamping device, the upper side of the upper clamping device is provided with the second connecting flange, and the upper clamping device and the lower clamping device are provided with the connecting piece, and the connecting piece is fixed on the upper clamping device and the lower clamping device through the screw.

[0012] Further, the first connecting flange and the lower clamping device are provided with the second gasket.

[0013] Further, the first connecting flange and the second connecting flange are connected through the third bolt, and one end of the third bolt is threadedly connected with the third nut.

[0014] The utility model discloses the beneficial effect is:

[0015] (1), through the bolt and the nut between the test pressure flange one and the shell connecting flange are connected, this kind of connecting mode is simple and reliable, and it is convenient to quick installation and disassembly, in addition, through the pressing force of the pressing flange end acting on the packing is changed to 45 DEG, this design cleverly changes the stress mode of packing, and the pressing force of 45 DEG can be decomposed into axial pressing force and radial pressing force. Axial pressing force can ensure that packing is stressed in the longitudinal direction and makes packing radial expansion, and radial pressing force can make packing and floating head outer diameter more closely adhere, to realize more effective sealing.

[0016] (2), through setting the bursting disc on the test pressure flange one, can be broken automatically when pressure exceeds the set value, releases pressure, and the safety of equipment and operating personnel is protected. This design adds an important safety guarantee for the floating head heat exchanger pipe head pressure test tooling. DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment, and obviously, the drawing in the following description is only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0018] Figure 1 It is a kind of floating head heat exchanger pipe head pressure test improved sealing tool main view according to the utility model embodiment.

[0019] Figure 2 It is a back view of a floating head heat exchanger pipe head pressure test improved sealing tool according to an embodiment of the utility model;

[0020] Figure 3 It is a plane structure view of a floating head heat exchanger pipe head pressure test improved sealing tool according to an embodiment of the utility model;

[0021] Figure 4 It is a bursting disc connection view of a floating head heat exchanger pipe head pressure test improved sealing tool according to an embodiment of the utility model.

[0022] In the figure,

[0023] 1, pressure test flange one; 2, pressure test flange two; 3, shell connecting flange; 4, pressing flange; 5, packing seal; 6, first gasket; 7, first bolt; 8, first nut; 9, second bolt; 10, second nut; 11, connecting pipe; 12, first connecting flange; 13, lower clamp holder; 14, bursting disc; 15, upper clamp holder; 16, connecting sheet; 17, second gasket; 18, third bolt; 19, third nut; 20, second connecting flange. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] According to the embodiments of the utility model, a floating head heat exchanger pipe head pressure test improved sealing tool is provided.

[0026] Embodiment one

[0027] As Figures 1-4As shown, the floating head heat exchanger pipe head pressure test improvement sealing tool according to the utility model embodiment, including pressure test flange one 1, pressure test flane one 1 one side welding has pressure test flange two 2, pressure test flange one 1 one side is equipped with shell connecting flange 3, pressure test flange two 2 one side is equipped with the pressing flange 4, pressure test flange two 2 inside is equipped with packing seal 5, and packing seal 5 is filled in pressure test flange two 2 inside sealing groove, and packing seal 5 one side is obliquely cut into 45 °, and the neck end face angle of pressing flange 4 is 45 °, and first gasket 6 is equipped between pressure test flange one 1 and shell connecting flange 3, and pressure test flange one 1 and shell connecting flange 3 are connected through first bolt 7, and first bolt 7 one end is equipped with first nut 8, and pressure test flange two 2 and pressing flange 4 are connected through second bolt 9, and second bolt 9 one end is equipped with second nut 10. Through the above scheme, when pressure testing, first, pressure test flange one 1 is welded with pressure test flange two 2, then shell connecting flange 3 is connected with pressure test flange one 1 through first bolt 7, first nut 8 and first gasket 6, so that it is effectively sealed. Then packing seal 5 is loaded into the sealing groove of pressure test flange two 2, and pressing flange 4 is fastened with pressure test flange two 2 through second bolt 9 and second nut 10, so that the pressing force of the end part of pressing flange 4 on the packing is changed to 45 °, which can enhance the overall stability and reliability of the tool. Even in a high-pressure environment, it can also maintain good sealing performance and prevent leakage from occurring, and then the shell of the entire floating head heat exchanger can be hydrostatically tested to detect whether the pipe head between the shell, connecting pipe, heat exchange pipe and tube sheet has defects.

[0028] As Figures 1-4As shown, the test pressure flange one 1 is fixedly connected with a connecting pipe 11, one end of the connecting pipe 11 is provided with a first connecting flange 12, the upper side of the first connecting flange 12 is provided with a lower clamping device 13, the upper side of the lower clamping device 13 is provided with a bursting disc 14, the bursting disc 14 is a reverse-arch-shaped bursting disc 14, the upper side of the bursting disc 14 is provided with an upper clamping device 15, the upper side of the upper clamping device 15 is provided with a second connecting flange 20, the upper clamping device 15 and the lower clamping device 13 are provided with a connecting piece 16, the connecting piece 16 is fixed on the upper clamping device 15 and the lower clamping device 13 through screws, the second gasket 17 is arranged between the first connecting flange 12 and the lower clamping device 13, the third gasket is arranged between the second connecting flange 20 and the upper clamping device 15, which is used for sealing the first connecting flange 12 and the second connecting flange 20, the first connecting flange 12 and the second connecting flange 20 are connected through the third bolt 18, one end of the third bolt 18 is threadedly connected with the third nut 19, which is used for fixing the bursting disc 14 above the first connecting flange 12. Through the above scheme, when the pressure in the system exceeds the set safety threshold value during the pressure test, the bursting disc 14 will automatically break and rapidly release the excessive pressure. It can immediately reduce the pressure in the system and prevent the equipment from exploding or being damaged due to overpressure. This automatic breaking mechanism not only protects the equipment itself from high pressure damage, but also ensures the safety of the operators.

[0029] In summary, by virtue of the above technical scheme of the utility model, the test pressure flange one 1 and the shell connecting flange 3 are connected through bolts and nuts, which is a simple and reliable connection method, facilitating quick installation and disassembly, in addition, the compression force of the compression flange 4 end acting on the packing is changed to 45°, the 45° compression force can be decomposed into axial compression force and radial compression force. The axial compression force can ensure that the packing is compressed in the longitudinal direction, making the packing radially expand, while the radial compression force can make the packing more closely adhere to the outer diameter of the floating head, thereby realizing more effective sealing, and the bursting disc 14 arranged on the test pressure flange one 1 can automatically break and release pressure when the pressure exceeds the set value, protecting the safety of the equipment and operators. This design adds an important safety guarantee for the floating head heat exchanger pipe head pressure test tool.

[0030] The above merely describes preferred embodiments of the utility model and is not intended to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An improved sealing tool for tube head pressure testing of a floating head heat exchanger, characterized in that, Including test pressure flange one (1), one side fixedly connected with test pressure flange two (2), one side of test pressure flange one (1) is equipped with casing connection flange (3), one side of test pressure flange two (2) is equipped with compression flange (4), the inside of test pressure flange two (2) is equipped with packing seal (5), and the neck end face angle of compression flange (4) is 45 °.

2. The improved sealing tool for pressure testing of the tube sheet of the floating head heat exchanger according to claim 1, characterized in that, First gasket (6) is equipped between test pressure flange one (1) and casing connection flange (3).

3. The improved sealing tool for tube head pressure test of floating head heat exchanger according to claim 1, characterized in that, Test pressure flange one (1) and casing connection flange (3) are connected by first bolt (7), and one end of first bolt (7) is threadedly connected with first nut (8).

4. The improved sealing tool for pressure testing of the tube sheet of the floating head heat exchanger according to claim 1, characterized in that, Test pressure flange two (2) and compression flange (4) are connected by second bolt (9), and one end of second bolt (9) is threadedly connected with second nut (10).

5. The improved sealing tool for pressure testing of the tube sheet of the floating head heat exchanger according to claim 1, wherein, The connecting pipe (11) is fixedly connected on test pressure flange one (1), one end of the connecting pipe (11) is equipped with the first connecting flange (12), the first connecting flange (12) is equipped with the lower clamp (13) above, the lower clamp (13) is equipped with the bursting disc (14) above, the bursting disc (14) is equipped with the upper clamp (15) above, the upper clamp (15) is equipped with the second connecting flange (20) above, the connecting piece (16) is equipped between the upper clamp (15) and the lower clamp (13), and the connecting piece (16) is fixed on the upper clamp (15) and the lower clamp (13) by screws.

6. The improved sealing tool for pressure testing of a tube sheet of a floating head heat exchanger according to claim 5, wherein Second gasket (17) is equipped between first connecting flange (12) and lower clamp (13).

7. The improved sealing tool for tube head pressure testing of a floating head heat exchanger according to claim 5, wherein, First connecting flange (12) and second connecting flange (20) are connected by third bolt (18), and one end of third bolt (18) is threadedly connected with third nut (19).

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