Heat exchange tube pressure test mould

Abstract

The utility model discloses a heat exchange tube pressure test mould, which comprises a platform, a fixed end, a movable end and a fixed plate, angle steel slideways are arranged on two sides of the movable end, two lead screw nuts are welded on the platform on one side of the movable end, lead screws matched with the lead screw nuts are arranged on the lead screw nuts, and the movable end and a heat exchange tube can be integrally compressed by rotating the lead screws. Internal threads of the cylindrical nuts are matched with external threads of the full-thread bolts, and the plugs can be pushed to slide forwards by rotating the full-thread bolts, so that the two ends of the single heat exchange tube are tightly pressed with the rubber pads respectively. The pressure testing device can be used for testing the pressure of common heat exchange tubes with various external diameters such as phi 19, phi 25, phi 38, phi 45 and the like, and is high in universality.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment manufacturing, in particular to a heat exchange tube pressure testing jig. Background Art

[0002] Heat exchangers are the most common equipment in fine chemicals and petrochemicals, and heat exchange tubes are the main pressure-bearing components of heat exchangers. If a heat exchange tube leaks during use, the cold medium and the hot medium will mix, which will affect the heat exchange effect of the heat exchanger and cause the system process to fail to meet the requirements. Therefore, the heat exchange tubes must be retested and pressure tested before assembly to ensure quality. The existing heat exchange tube pressure test jig structures are too complicated. For example, the Chinese invention patent with announcement number CN 114993577 A uses a motor, a gear set and multiple cylinders, which makes the cost high. The Chinese invention patent with announcement number CN 109357949 A also uses a motor and a mounting rail, which increases the manufacturing cost. In addition, when multiple heat exchange tubes are pressure tested at the same time, some heat exchange tubes are not sealed tightly, which seriously affects the pressure test effect. In addition, they can only pressure test heat exchange tubes with a single outer diameter size specification, and have poor versatility. Summary of the invention

[0003] In order to overcome the defects of the prior art such as complex structure of the heat exchange tube pressure test jig, high cost, loose sealing during batch pressure test, and poor compatibility with different outer diameters, the utility model provides a jig with simple structure, low cost, convenient operation, good sealing during batch pressure test, and the ability to adapt to the pressure test needs of heat exchange tubes with a variety of commonly used tube diameters and specifications, which can meet the pressure test requirements of heat exchanger manufacturers for heat exchange tubes.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a heat exchange tube pressure test jig, including a platform, a fixed end, a movable end and a fixed plate, angle steel slideways are arranged on both sides of the movable end, two lead screw nuts are welded on the platform on one side of the movable end, and a lead screw matching the lead screw nut is arranged on the lead screw, and the movable end and the heat exchange tube as a whole can be pressed tightly by rotating the lead screw.

[0005] A heat exchange tube pressure test jig is provided with a water collection chamber, a baffle and a blind plate at the fixed end. The water collection chamber is processed from a thick steel plate, and T-shaped holes are evenly arranged at a certain interval on one side of the water collection chamber. The number of T-shaped holes is 10, and a rubber pad is tightly installed at the large end of each T-shaped hole. The other side is a water collection chamber, and the water collection chamber is connected to the T-shaped hole. The blind plate is welded to the processed water collection chamber with fillet welds on all sides, and the weld joint must be tightly sealed, and the height of the weld leg is equal to the thickness of the thinner part. Three countersunk screw holes are provided on the other side of the water collection chamber, and three holes are provided on the baffle to match them, which are connected by bolts. The baffle is also arranged with 10 through holes, and the diameter of this through hole is 1mm larger than the outer diameter of the heat exchange tube, which can prevent the rubber pad from falling out. A water inlet and a water outlet are opened on the blind plate, the water inlet is connected to the pressure test pump, and the water outlet is connected to the water reservoir.

[0006] A heat exchange tube pressure test jig, wherein the movable end is provided with a movable box, a plug, a baffle, a cylindrical nut and a fully threaded bolt. The movable box is also made of thick steel plate, and is provided with 10 through holes that match the T-shaped holes on the fixed end. A plug is provided on the through hole on the side opposite to the fixed end, and the plug can move freely in the through hole. A rubber pad is installed at the front end of the plug. Cylindrical nuts are provided in the through holes on the other side of the through holes of the movable box, and the ends of the cylindrical nuts are exposed 5mm from the end face of the movable box, and the periphery is spot welded to the movable box. The cylindrical nuts are all equipped with fully threaded bolts. Three countersunk screw holes are provided on the side of the movable box opposite to the fixed end, and three holes are provided on the baffle to match them, which are connected by bolts. The baffle is the same as the baffle at the movable end.

[0007] A heat exchange tube pressure test jig, wherein a fixing plate is spot-welded on the platform at intervals of 1m, and 10 U-shaped grooves are evenly opened on the fixing plate at intervals of a certain distance to match the outer dimensions of the heat exchange tube.

[0008] A heat exchange tube pressure test jig has angle steel slideways on both sides of a movable end, the angle steel tracks are welded to a platform, and the platform is a frame made of channel steel or I-beam, on which steel plates are laid and welded.

[0009] A heat exchange tube pressure test jig, wherein two lead screw nuts are welded on a platform on one side of the movable end, and a lead screw matching the lead screw nut is disposed on the lead screw nut, and the movable end and the heat exchange tube as a whole can be pressed tightly by rotating the lead screw.

[0010] A heat exchange tube pressure test jig, wherein the internal thread of a cylindrical nut matches the external thread of a full-thread bolt, and the full-thread bolt can be rotated to push the plug to slide forward to tightly press the two ends of a single heat exchange tube against a rubber pad one and a rubber pad two respectively.

[0011] A heat exchange tube pressure testing jig, wherein the end of the lead screw is provided with a protective sleeve, which can protect the lead screw head and a movable box at the movable end.

[0012] The beneficial effect of the utility model is that the heat exchange tube pressure test jig of the utility model is manufactured by machining and welding steel plates and round steels, has a simple structure and low cost, and when a plurality of heat exchange tubes are subjected to batch pressure testing, in addition to pressing the movable end and the heat exchange tube as a whole by rotating the lead screw, the full-threaded bolt matched with the cylindrical nut can locally press each heat exchange tube separately according to the deviation of the length of the heat exchange tube, thereby preventing the situation of unreliable sealing and leakage of individual heat exchange tubes, and can perform pressure testing on heat exchange tubes of various commonly used outer diameter sizes such as φ19, φ25, φ38, φ45 and other specifications, and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the utility model;

[0014] Figure 2 For along Figure 1 Schematic diagram of the AA line.

[0015] In the figure, 1. platform, 2. fixed end, 3. movable end, 4. fixed plate, 5. angle steel slideway, 6. screw nut, 7. screw, 8. baffle, 9. baffle bolt, 10. heat exchange tube, 2a. water collecting chamber, 2b. blind plate, 2c. rubber pad 1, 3a. movable box, 3b. plug, 3c. cylindrical nut, 3d. full-thread bolt, 3e. rubber pad 2. DETAILED DESCRIPTION

[0016] The following is combined with Figure 1 and attached Figure 2 The present invention is described in further detail.

[0017] A heat exchange tube pressure test jig comprises a platform 1, a fixed end 2, a movable end 3 and a fixed plate 4. Angle steel slideways 5 are arranged on both sides of the movable end 3. Two lead screw nuts 6 are welded on the platform on one side of the movable end. The lead screw nuts 6 are provided with a matching lead screw 7. The movable end and the heat exchange tube can be pressed together as a whole by rotating the lead screw.

[0018] A heat exchange tube pressure test jig, the fixed end of which is provided with a water collection chamber 2a, a baffle 8 and a blind plate 2b. The water collection chamber is made of thick steel plate, and one side of the water collection chamber is evenly arranged with T-shaped holes at a certain interval. The number of T-shaped holes is 10, and a rubber pad 2c is tightly installed at the large end of each T-shaped hole. The other side is a water collection chamber, and the water collection chamber is connected to the T-shaped hole. The blind plate 2b is welded with fillet welds to the processed water collection chamber 2a on all sides, and the weld joint must be tightly sealed, and the height of the weld leg is equal to the thickness of the thinner part. Three countersunk screw holes are provided on the other side of the water collection chamber 2a, and three holes are provided on the baffle to match them, which are connected by bolts 9. The baffle 8 is also arranged with 10 through holes, and the diameter of the through holes is 1mm larger than the outer diameter of the heat exchange tube. The blind plate 2b is provided with a water inlet and a water outlet, the water inlet is connected to the pressure test pump, and the water outlet is connected to the water reservoir.

[0019] A heat exchange tube pressure test jig, wherein the movable end is provided with a movable box 3a, a plug 3b, a baffle 8, a cylindrical nut 3c and a fully threaded bolt 3d. The movable box 3a is also made of thick steel plate, and 10 through holes are processed on the movable box 3a to match the T-shaped holes on the fixed end. The through hole on the side opposite to the fixed end 2 is provided with a plug 3b, and the plug can move freely in the through hole. A rubber pad 3e is installed at the front end of the plug 3b, and a cylindrical nut 3c is provided in the through hole on the other side of the movable box through hole. The end of the cylindrical nut 3c is exposed 5mm from the end face of the movable box 3a, and the periphery is spot welded with the movable box 3a. The cylindrical nuts 3c are all equipped with fully threaded bolts 3d. The side of the movable box 3a opposite to the fixed end 2 is provided with three countersunk screw holes, and the baffle 8 is provided with three holes to match it, which are connected by bolts 9. The baffle is the same as the baffle at the movable end.

[0020] A heat exchange tube pressure test jig, wherein a fixing plate 4 is spot-welded at intervals of 1 m on the platform 1, and 10 U-shaped grooves are evenly opened at intervals of a certain distance on the fixing plate 4 to match the outer dimensions of the heat exchange tube.

[0021] A heat exchange tube pressure test jig has angle steel slideways 5 arranged on both sides of the movable end. The angle steel tracks 5 are welded to a platform. The platform is a frame made of channel steel or I-beam, on which steel plates are laid and welded.

[0022] A heat exchange tube pressure testing jig, wherein the end of the lead screw 7 is provided with a protective cover.

[0023] Before the pressure test, first fix the fixed end 2 on the platform 1, adjust the position of the movable end 3 and the screw nut 6 according to the length of the heat exchange tube 10, pre-assemble the fixed plate 4 at a spacing of 1m and weld it to the platform. Its function is to prevent the heat exchange tube 10 from bending and maintain its rigidity. Put one end of the heat exchange tube 10 into the T-hole of the water collecting chamber 2a of the fixed end 2, and put the other end into the front end of the through hole of the movable box 3a of the movable end 3, and embed the whole heat exchange tube into the groove of the fixed plate 4, so that the 10 heat exchange tubes 10 are placed one by one. Turn the two screws 7 in turn to press the movable end 3, so that the two ends of the heat exchange tube 10 are pressed as a whole. According to the length difference of the heat exchange tube 10, adjust the full-thread bolt 3d one by one to push the plug 3b to slide forward to tightly press the end of a single heat exchange tube with the rubber pad 1 2c and the rubber pad 2 3e, so as to prevent the leakage caused by the poor sealing of a heat exchange tube due to the length deviation of the heat exchange tube. Turn on the pressure test pump and fill it with water to test the pressure. After reaching the specified pressure test pressure, maintain the pressure for a certain period of time and check the heat exchange tube 10. If there is a leak, mist water will be sprayed out, making it easy to find the leak point. In this way, the pressure test can be carried out in batches, and 10 tubes can be tested each time.

[0024] For the pressure test of heat exchange tubes with commonly used outer diameters such as φ19, φ25, φ38, and φ45, it is only necessary to adjust the sizes of the fixed end 2, the movable end 3, and the fixed plate 4 to meet the pressure test needs of heat exchange tubes with different outer diameters.

Claims

1. A heat exchange tube pressure test jig, comprising a platform (1), a fixed end (2), a movable end (3) and a fixed plate (4), wherein angle steel slideways (5) are arranged on both sides of the movable end (3), two lead screw nuts (6) are welded on the platform on one side of the movable end, and a lead screw (7) matching the lead screw nut (6) is arranged on the lead screw nut (6), characterized in that: The fixed end (2) is provided with a water collecting chamber (2a), a baffle (8) and a blind plate (2b). T-shaped holes are evenly arranged at a certain interval on one side of the water collecting chamber (2a). The number of T-shaped holes is 10. A rubber pad (2c) is tightly installed on the large end of each T-shaped hole. The other side is a water collecting chamber. The water collecting chamber is connected to the T-shaped hole. The blind plate (2b) is sealed with the processed water collecting chamber (2a) by fillet welds on all sides. The movable end is provided with a movable box body (3a), a plug (3b), a baffle (8), a cylindrical nut (3c) and a full-thread bolt (3d). Ten through holes are processed on the movable box body (3a) to match the T-shaped holes on the fixed end. A plug (3b) is provided on the through hole on the side opposite to the fixed end (2). The plug (3b) can slide freely in the through hole. A rubber pad (3e) is installed at the front end of the plug (3b).

2. A heat exchange tube pressure test jig according to claim 1, characterized in that: The platform (1) is a frame made of channel steel or I-beam, on which steel plates are laid and welded.

3. The heat exchange tube pressure test jig according to claim 1, characterized in that: The water collecting chamber (2a) on the fixed end (2) and the movable box (3a) on the movable end (3) are both made of thick steel plates.

4. A heat exchange tube pressure test jig according to claim 1, characterized in that: A water inlet and a water outlet are formed on the blind plate (2b) of the fixed end (2), the water inlet is connected to a pressure test pump, and the water outlet is connected to a water reservoir.

5. The heat exchange tube pressure test jig according to claim 1, characterized in that: The fixing plate (4) is installed vertically or perpendicularly on the platform (1), with one plate being provided every 1 m. Ten U-shaped grooves are evenly provided on the fixing plate (4) at regular intervals to match the external dimensions of the heat exchange tubes.

6. A heat exchange tube pressure test jig according to claim 1, characterized in that: The internal thread of the cylindrical nut (3c) matches the external thread of the full-thread bolt (3d), and the full-thread bolt (3d) can be rotated to push the plug (3b) to slide forward and tightly press the end of the single heat exchange tube against the rubber pad 1 (2c) and the rubber pad 2 (3e).

7. The heat exchange tube pressure test jig according to claim 1, characterized in that: Ten through holes are arranged on the baffle (8), and the diameter of the through holes is 1 mm larger than the outer diameter of the heat exchange tube.

8. The heat exchange tube pressure test jig according to claim 1, characterized in that: The end of the lead screw (7) is provided with a protective sleeve.

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