Hydraulic pressure test auxiliary structure

Abstract

The utility model relates to the technical field of pressure vessel connecting pipe transformation, in particular to a hydrostatic test auxiliary structure which comprises a pressure vessel, a connecting pipe and a pipe cap, and transformation holes are formed in the cylinder wall of the pressure vessel. The first end of the connecting pipe is selectively connected with the pressure test pump, and the second end is embedded and fixed in the transformation hole; the pipe cap is fixed to the second end of the connecting pipe and used for temporarily sealing the second end of the connecting pipe so that a pressure bearing space can be formed in the connecting pipe. According to the utility model, the closed pressure-bearing space is formed at the communication part of the connecting pipe and the pressure container through the pipe cap, and the water pressure test of the connecting pipe can be completed only by filling water into the pressure-bearing space and pressurizing during the water pressure test, so that the water demand of the water pressure test is smaller, the waste of water resources can be effectively reduced, and the cost is reduced. And meanwhile, after the water pressure test, the pipe cap is detached, so that the connecting pipe is communicated with the original pressure container again, and the subsequent normal use of the equipment is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure vessel connection pipe reform technical field especially, relate to a water pressure test auxiliary structure. BACKGROUND

[0002] Pressure vessel connection pipe reform is to adapt to process demand change, improve production efficiency, ensure equipment safety, meet environmental protection and regulation requirements. Specifically, with the improvement of production process or the change of product type, the original pressure vessel may need to increase or replace the inlet and outlet, measurement point, cleaning port, etc. In order to improve efficiency or optimize operation, it may be necessary to increase the connection point or change the position of the connection pipe. After a long time of operation, some components may be damaged and need to be replaced or repaired. When safety hazards are found, reform can enhance safety performance. In summary, connection pipe reform not only meets production demand, improves efficiency and safety, but also meets regulatory requirements and realizes sustainable development.

[0003] Water pressure test is an important inspection step after pressure vessel connection pipe reform, mainly used for detecting the strength and tightness of the newly added connection pipe and its welded joint. At present, the common pressure vessel connection pipe reform method is to re-drill holes on the existing pressure vessel cylinder or to expand the holes at the original connection pipe position, and then to weld the new connection pipe to the cylinder. After welding and non-destructive testing, the connection pipe is connected to the test pump, and then the whole device is filled with water and pressurized by the test pump. After a certain period of pressure maintenance, it is observed whether there is leakage, visible abnormal deformation or abnormal sound at the newly added connection pipe.

[0004] In the existing pressure vessel connection pipe reform structure, the connection pipe after welding is in communication with the pressure vessel, which makes the subsequent water pressure test need to fill water and pressurize in the original pressure vessel and the newly added connection pipe. The required water quantity is large. Especially when the pressure vessel is a large device, several hundred tons of water may be used for water pressure test. Therefore, the existing pressure vessel connection pipe reform structure is prone to cause a large amount of waste of water resources, and the water filled in the whole pressure vessel is easy to overload the original civil foundation, thereby adversely affecting the structure of the civil foundation. In order to solve the above technical problems, it is necessary to provide a water pressure test auxiliary structure. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a water pressure test auxiliary structure, which forms a sealed pressure bearing space at the communication position of the connection pipe and the pressure vessel through the pipe cap. During water pressure test, only water needs to be filled and pressurized in the pressure bearing space to complete the water pressure test of the connection pipe, which makes the water demand of the water pressure test small, can effectively reduce the waste of water resources, and is beneficial to the overload protection of the civil foundation structure. At the same time, after water pressure test, the pipe cap is removed to make the connection pipe and the original pressure vessel re-communicate, which does not affect the subsequent normal use of the equipment.

[0006] The technical scheme of the utility model is realized as follows:

[0007] The utility model provides a kind of hydrostatic test auxiliary structure, including pressure vessel, still including connecting pipe and pipe cap, wherein,

[0008] The barrel wall of the pressure vessel is provided with a reconstruction hole;

[0009] The first end of the connecting pipe is selectively connected to a pressure test pump, and the second end is embedded and fixed in the reconstruction hole;

[0010] The pipe cap is fixed at the second end of the connecting pipe, and the pipe cap is used to temporarily close the second end of the connecting pipe to form a pressure-bearing space in the connecting pipe.

[0011] On the basis of the above technical solution, preferably, a first flange is welded on the first end of the connecting pipe, and bolt mounting holes are provided on the first flange.

[0012] On the basis of the above technical solution, preferably, a second flange is welded on the second end of the connecting pipe, wherein,

[0013] The side of the second flange is fixedly connected and sealed with the hole wall of the reconstruction hole by welding.

[0014] On the basis of the above technical solution, preferably, one end of the second flange is aligned with the outer barrel wall of the pressure vessel, and the other end is aligned with the inner barrel wall of the pressure vessel.

[0015] On the basis of the above technical solution, preferably, one end of the pipe cap is provided with an opening, and the inside of the pipe cap is provided with an inner cavity, wherein,

[0016] The opening is in communication with the inner cavity;

[0017] One end of the pipe cap provided with the opening is fixed on the second flange.

[0018] On the basis of the above technical solution, preferably, the pipe cap is fixedly welded with the second flange.

[0019] On the basis of the above technical solution, preferably, the pipe cap is connected with the second flange by bolt fixing.

[0020] On the basis of the above technical solution, preferably, it further includes a screw rod and a nut, wherein,

[0021] A third flange is provided on one end of the pipe cap provided with the opening, the third flange abuts against the second flange, and bolt through holes are provided on the third flange;

[0022] One end of the screw rod is welded on the second flange, and the other end penetrates the bolt through holes and screws the nut.

[0023] Preferably, a rubber pad is arranged between the third flange and the second flange.

[0024] Preferably, the bolt penetrating hole protrudes outward and forms a boss shape at an end close to the nut.

[0025] The hydraulic test auxiliary structure of the utility model has the following beneficial effects relative to the prior art:

[0026] (1) The pipe cap is arranged to temporarily close the second end of the connecting pipe, so that a pressure bearing space is formed in the connecting pipe, and the water pressure can be borne through the pressure bearing space during the water pressure test.

[0027] (2) The third flange, screw rod and nut are arranged to facilitate the removal of the pipe cap. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description.

[0029] Figure 1 It is a front view of the hydraulic test auxiliary structure of the utility model;

[0030] Figure 2 It is an A-A sectional view of the utility model;

[0031] Figure 3 It is a partial perspective view of the utility model;

[0032] Figure 4 It is a partial exploded view of the utility model;

[0033] In the diagram: 1. Pressure vessel; 2. Connecting pipe; 3. Pipe cap; 4. Screw; 5. Nut; 101. Modification hole; 201. First flange; 202. Bolt mounting hole; 203. Second flange; 301. Opening; 302. Inner cavity; 303. Third flange; 304. Bolt through hole. Detailed Implementation

[0034] The technical solutions of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] like Figures 1-4 As shown, this utility model discloses an auxiliary structure for hydrostatic testing, mainly used for the modification of pipe connections in pressure equipment. It includes two modification structures, as detailed below:

[0036] Figures 1-3 The image shows the first modified structure of the aforementioned hydraulic test auxiliary structure, which includes a pressure vessel 1, a connecting pipe 2, and a pipe cap 3.

[0037] Pressure vessel 1 is an existing pressure equipment on site, including tower vessels, horizontal vessels, and vertical equipment. Figure 2 The diagram shows a schematic of the tower equipment. When this type of equipment needs to be modified, firstly, a modification hole 101 is opened on the cylinder wall or pipe wall of the pressure vessel 1. Then, the second end of the fitting with a suitable pipe diameter is inserted into the modification hole 101 and welded in place. After welding, the fitting 2 and the modification hole 101 are fully welded and sealed.

[0038] Figure 2 In the middle, the lower end of the connector 2 is the second end, and the upper end is the first end. The first end of the connector 2 is welded with a first flange 201, and the first flange 201 is provided with bolt mounting holes 202. The test pump is connected through the first flange 201. During the water pressure test, water is injected into the connector 2 through the test pump.

[0039] like Figure 2 As shown, a cap 3 is welded to the second end of connector 2. Specifically, as... Figure 2 As shown, one end of the cap 3 is provided with an opening 301, and the inside of the cap 3 is provided with an inner cavity 302, wherein the opening 301 is connected to the inner cavity 302; the end of the cap 3 with the opening 301 is fixed to the second end of the connecting pipe 2, and after the cap 3 and the connecting pipe 2 are welded, a pressure-bearing space is formed inside the connecting pipe 2.

[0040] During the modification, the second end of connector 2 is welded to the modification hole 101 of pressure vessel 1. After welding, connector 2 is disconnected from pressure vessel 1 by pipe cap 3. During the hydrostatic test, if... Figure 2 As shown, the water pressure is borne by the pressure-bearing space. Therefore, during the water pressure test, only water needs to be filled into the pressure-bearing space to complete the test of pipe 2. This means that only pipe 2 needs to be filled with water, without needing to fill the original pressure vessel 1. This reduces the water demand for the water pressure test, minimizing water waste. Furthermore, it is less likely to overload the existing civil engineering foundation, which is beneficial for the protection of the foundation structure. After the water pressure test, the test pump is removed, and the pipe cap 3 is cut off to reconnect pipe 2 to the original pressure vessel 1, without affecting the subsequent normal use of the equipment.

[0041] In the above structure, the pressure vessel 1 has an inspection hole, also known as a septic tank opening, which is used for maintenance personnel to enter and exit the pressure vessel 1 for maintenance work. When it is necessary to remove the cap 3, the worker enters the pressure vessel 1 through the inspection hole and then uses a cutting device to cut off the cap 3. After cutting, the cut is ground smooth. The cutting device can be a handheld cutting machine.

[0042] like Figure 1 As shown, when removing the cap 3, in order to avoid damaging the inner wall of the original pressure vessel 1, as follows: Figure 2 As shown, a second flange 203 is welded to the second end of the connecting pipe 2. The second flange 203 increases the grinding space, making it less likely for the grinding equipment to come into contact with the inner wall of the pressure vessel 1, thus protecting the inner wall of the pressure vessel 1. Simultaneously, the inner diameter of the modified hole 101 is adapted to the second flange 203. Specifically, as shown... Figure 3 As shown, the second flange 203 has an arc-shaped plate structure, combined with Figure 2 The side of the second flange 203 is fixedly connected and sealed to the wall of the modified hole 101 by welding. After welding, one end of the second flange 203 is aligned with the outer cylinder wall of the pressure vessel 1, and the other end is aligned with the inner cylinder wall of the pressure vessel 1. This integrates the second flange 203 with the pressure vessel 1. Meanwhile, as... Figure 2 As shown, the end of the cap 3 with an opening 301 is welded to the second flange 203. The inner diameter of the cap 3 is 100mm larger than the outer diameter of the connector 2. Therefore, when cutting the cap 3, the cutting equipment is less likely to accidentally touch the welded part between the second flange 203 and the connector 2, which is beneficial to the structural protection of the welded part between the connector 2 and the second flange 203.

[0043] Figure 4 The image shows the second modified structure of the aforementioned hydraulic test auxiliary structure, specifically the partial explosion structure. The main difference compared to the first modified structure is that the cap 3 in the second modified structure is fixed to the second flange 203 using bolts.

[0044] In the second modification structure, the pipe cap 3 is connected with the second flange 203 by bolt fixing mode, which facilitates the dismounting of the pipe cap 3 and the subsequent cutting operation. To achieve this purpose, as shown in Figure 4 the pipe cap 3 is provided with a third flange 303 at one end of the opening 301, wherein the third flange 303 abuts against the second flange 203, and a rubber pad is arranged between the third flange 303 and the second flange 203 for sealing.

[0045] As shown in Figure 4 the second flange 203 is welded with a plurality of threaded rods 4, and the third flange 303 is provided with bolt through holes 304, one end of the threaded rod 4 penetrates the bolt through hole 304 and is screwed with a nut 5, after the nut 5 is tightened, the pipe cap 3 is fastened on the second flange 203 through the cooperation of the nut 5 and the threaded rod 4, and the fixation of the pipe cap 3 is achieved. Through this structure, the dismounting of the pipe cap 3 after the hydraulic test is facilitated, and after dismounting, only the threaded rod 4 needs to be cut off, which greatly improves the convenience of the cutting operation.

[0046] To facilitate the installation and fixation of the nut 5, the end of the bolt through hole 304 close to the nut 5 protrudes outward and forms a boss shape, which is a mounting table for the nut 5, and after the nut 5 is tightened, the nut 5 abuts against the end face of the boss, and through the boss, the nut 5 is tightened.

[0047] The use method of the hydraulic test auxiliary structure of the utility model is as follows:

[0048] First, the reform hole 101 is opened on the pressure vessel 1, and then the second end of the connecting pipe 2 is welded and fixed in the reform hole 101, and during the hydraulic test, the connecting pipe 2 is connected with the pressure test pump, wherein the output pipeline of the pressure test pump is connected with the connecting pipe 2 through flanges. After the test, the pipe cap 3 is cut off. If the second modification structure is adopted, after the test, the pipe cap 3 is dismounted first, and then the threaded rod 4 is cut off. After cutting, the cut is polished smooth.

[0049] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A hydrotest auxiliary structure comprising a pressure vessel (1), characterized in that: Also include the pipe (2) and pipe cap (3), wherein, The barrel wall of the pressure vessel (1) is provided with a modified hole (101); The first end of the pipe (2) is selectively connected to a pressure test pump, and the second end is inlaid and fixed in the modified hole (101); The pipe cap (3) is fixed at the second end of the pipe (2), and the pipe cap (3) is used to temporarily seal the second end of the pipe (2) to form a pressure space in the pipe (2).

2. A hydrotest assist structure as claimed in claim 1, wherein: The first flange (201) is welded on the first end of the pipe (2), and the bolt mounting hole (202) is arranged on the first flange (201).

3. A hydrotest assist structure as defined in claim 1, wherein: The second flange (203) is welded on the second end of the pipe (2), wherein, The side of the second flange (203) is fixedly connected and sealed with the hole wall of the modified hole (101) by welding.

4. A hydrotest assist structure as claimed in claim 3, wherein: One end of the second flange (203) is aligned with the outer barrel wall of the pressure vessel (1), and the other end is aligned with the inner barrel wall of the pressure vessel (1).

5. A hydrotest assist structure as claimed in claim 4, wherein: One end of the pipe cap (3) is provided with an opening (301), and the inside of the pipe cap (3) is provided with an inner cavity (302), wherein, The opening (301) communicates with the inner cavity (302); The end of the pipe cap (3) provided with the opening (301) is fixed on the second flange (203).

6. A hydrotest assist structure as claimed in claim 5, wherein: The pipe cap (3) and the second flange (203) are welded and fixed.

7. A hydrotest assist structure as claimed in claim 5, wherein: The pipe cap (3) and the second flange (203) are connected by bolt fixing mode.

8. A hydrotest assist structure as claimed in claim 7, wherein: Also include screw rod (4) and nut (5), wherein, The end of the pipe cap (3) provided with the opening (301) is provided with a third flange (303), the third flange (303) abuts against the second flange (203), and the third flange (303) is provided with a bolt through hole (304); One end of the screw rod (4) is welded on the second flange (203), and the other end penetrates the bolt through hole (304) and screws the nut (5).

9. A hydrotest assist structure as claimed in claim 8, wherein: A rubber pad is arranged between the third flange (303) and the second flange (203).

10. A hydrotest assist structure as defined in claim 8, wherein: The end of the bolt through hole (304) close to the nut (5) protrudes outward and forms a boss shape.

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