A pipe flange weld strength detection device

Abstract

A pipe flange weld strength testing device includes a bolt, a locking cover, a gland, a welding cylinder, two glands, three glands, a pipe body, and a flange. A flange is provided around the outside of the pipe body. The outer side of the left end of the pipe body is connected to the inner side of the welding cylinder. A gap exists between the pipe body and the welding cylinder. The right side of the welding cylinder is connected to the left side of the second gland, the right side of the second gland is connected to the left side of the flange, the right side of the flange is connected to the third gland, the inner ring of the third gland is connected to the outside of the pipe body, the left end of the welding cylinder is connected to the right end of the first gland, the left side of the first gland is connected to the right end of the locking cover by a bolt, and an interface groove is provided on the top of the welding cylinder. This design uses a pressure gauge to test the pressure of the entire device, simulates the pressure required for actual working conditions, conducts a pressure test, and verifies whether the weld strength meets the requirements.

Description

Technical Field

[0001] The invention relates to an improvement on a pipe flange weld strength technology, belongs to the field of detection devices, and in particular to a pipe flange weld strength detection device. Background Art

[0002] The pipe body is a key component in marine equipment. A flange is welded to its outer diameter, serving as an external interface to the ship's bulkhead. Therefore, before delivery to the shipyard, the weld strength between the pipe body and the flange must be tested to verify that the weld meets the required strength. Currently, testing welds through flaw detection theoretically verifies that the weld strength meets the required strength, but this lacks the ability to actually test the weld between the pipe body and the flange, making this approach less convincing.

[0003] Chinese patent application number CN201520655181.1, filed on August 27, 2015, discloses a cupping device for testing weld strength. The device comprises at least a base and a punch, a pressure head unit, and a fixing unit. The pressure head unit comprises a semicircular pressure head A and a semicircular pressure head B. The fixing unit secures the pressure head unit to the base. The base also has an axial through-hole C at its center, located below a test slot. The inner diameter of through-hole C matches the outer diameter of the punch. During testing, a test plate is placed in the test slot. The top column A and the top portion B are pressed against different plates of the test plate via the fixing unit. The punch enters the base through through-hole C and, under the action of a punching machine, lifts the test plate toward through-hole B, thereby testing the weld strength of the test plate. However, this method still fails to verify the gap between the pipe body and the flange.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of this patent application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to overcome the problem in the prior art that the gap between the pipe body and the flange cannot be actually detected and verified, and to provide a pipe body flange weld strength detection device that can actually detect and verify the gap between the pipe body and the flange.

[0006] To achieve the above objectives, the technical solution of the present invention is: a pipe flange weld strength detection device, the pipe flange weld strength detection device comprising a bolt, a locking cover, a gland, a welding cylinder, a second gland, a third gland, a pipe body and a flange;

[0007] A flange is provided around the outer side of the tube body, the outer side of the left end of the tube body is connected to the inner side of the welding cylinder, and there is a gap area between the tube body and the welding cylinder. The right side of the welding cylinder is connected to the left side of the second pressure cover, the right side of the second pressure cover is connected to the left side of the flange, the right side of the flange is connected to the third pressure cover, the inner ring of the third pressure cover is connected to the outer side of the tube body, the left end of the welding cylinder is connected to the right end of the first pressure cover, and the left side of the first pressure cover is connected to the right end of the locking cover by a bolt, and an interface groove is provided on the top of the welding cylinder.

[0008] The flange is tilted upward to the right along the surface of the tube body. The second and third glands are tilted in the same direction as the flange with the same tilt angle. The second and third glands have the same diameter, which is larger than the diameter of the flange.

[0009] The right side of the three glands is threadedly engaged with a plurality of three bolts, one end of the three bolts passes through the three glands and the second gland and extends to the left side of the second gland, and one end of the three bolts extending to the left side of the second gland is connected to the three nuts.

[0010] A groove is provided on the left side of the three-pressure cover, and a flange is embedded in the inner wall of the groove. Three sealing rings are provided between the flange and the second pressure cover. A plurality of second bolts are inserted around the side of the three-pressure cover, and the plurality of second bolts are arranged on the inner side of the plurality of three bolts. One end of the second bolt passes through the three-pressure cover and cooperates with the flange thread.

[0011] The right end of the bolt passes through the locking cover and a pressure cover in sequence, and one side of the bolt that passes through the right end of the pressure cover is matched with a nut thread.

[0012] The locking cover plate includes a side plate and a connecting ring. The right side of the connecting ring is connected to the left side of the side plate. Three support plates are provided on the outside of the connecting ring. The three support plates are equidistantly spaced around the center of the connecting ring. The three support plates are all connected to the side plate, and a through hole is opened on the front side of the side plate.

[0013] A sealing ring and a second sealing ring are arranged between the right side of the side plate and a pressure cover in sequence. The diameters of the side plate and the pressure cover are the same, and the diameters of the pressure cover, the sealing ring, and the second sealing ring decrease in sequence.

[0014] The interface groove is connected with the gap area, a water inlet is provided at the bottom of the welding cylinder, a water outlet is provided on the left side of the welding cylinder and the locking cover plate, the water inlet, the water inlet and the gap area are connected with each other, and a card block is engaged with the inner wall of the interface groove.

[0015] A screw plug is inserted into the water inlet corresponding to the left side of the locking cover plate, and a reinforcement ring is provided on the outer side of the welding cylinder.

[0016] The tube body includes a tube body, the left side of the tube body is connected to the right side of the circular ring, the left side of the circular ring is connected to the right side of the clamping ring, the diameters of the tube body, the circular ring and the clamping ring are the same, and an annular groove is opened on the right side of the locking cover plate, and the clamping ring is snap-fitted with the annular groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. A pipe flange weld strength testing device of the present invention comprises a flange surrounding the outer side of the pipe body, the outer side of the left end of the pipe body is connected to the inner side of the welding cylinder, a gap area exists between the pipe body and the welding cylinder, the right side of the welding cylinder is connected to the left side of the second gland, the right side of the second gland is connected to the left side of the flange, the right side of the flange is connected to the third gland, the inner ring of the third gland is connected to the outer side of the pipe body, the left end of the welding cylinder is connected to the right end of the first gland, the left side of the first gland is connected to the right end of the locking cover by a bolt, the top of the welding cylinder is provided with an interface groove, the pipe body is inserted into the welding cylinder, the locking cover is fastened and sealed to the first gland, and the second gland is fastened and sealed to the third gland, after the entire device is installed, a pressure gauge is connected to the interface groove, and water is injected into the welding cylinder. The pressure of the entire device is tested by the pressure gauge, simulating the pressure required for actual working conditions, and a pressure test is performed to verify whether the weld strength meets the requirements. Therefore, the design can actually perform a pressure test to verify the weld strength, and the operation is simple.

[0019] 2. In a pipe flange weld strength testing device of the present invention, the right side of the three-head gland is threadedly engaged with multiple three-bolts. One end of the three-bolt passes through the three-head gland and the second-head gland and extends to the left side of the second-head gland. One end of the three-bolt extends to the left side of the second-head gland and is connected to the three nuts. A groove is opened on the left side of the three-head gland, and a flange is embedded in the inner wall of the groove. Three sealing rings are arranged between the flange and the second-head gland. Multiple two-bolts are inserted around the side of the three-head gland, and the multiple two-bolts are arranged inside the multiple three-bolts. One end of the two-bolt passes through the three-head gland and is threadedly engaged with the flange. The through-design of the two-bolt and three-bolt arrangement on the flange is novel in structure and can detect the strength of the welding position between the flange and the pipe body through pressure testing. Therefore, this design is novel and safe to use.

[0020] 3. In a pipe flange weld strength testing device of the present invention, a first sealing ring and a second sealing ring are sequentially disposed between the right side of the side plate and the first gland. The diameters of the side plate and the first gland are the same, and the diameters of the first gland, the first sealing ring, and the second sealing ring decrease in sequence. The interface groove is connected to the gap area. A water inlet is disposed at the bottom of the welding cylinder. A water outlet is provided on the left side of the welding cylinder and the locking cover. The water inlet, the water inlet, and the gap area are interconnected. A card block is engaged with the inner wall of the interface groove, thereby enhancing the sealing performance of the entire device. The interface groove can more conveniently connect to a pressure gauge for testing, making it more convenient to use. Therefore, this design is easy to use and has good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a cross-sectional view of the present invention.

[0023] Figure 3 It is an exploded view of the present invention.

[0024] Figure 4 It is a structural schematic diagram of the tube body in the present invention.

[0025] In the figure: a bolt 1, a nut 2, a locking cover plate 3, a side plate 31, a support plate 32, a through hole 33, a connecting ring 34, an annular groove 35, a sealing ring 4, two sealing rings 5, a gland 6, a welding cylinder 7, a water outlet 71, a block 72, a water inlet 73, an interface groove 74, two glands 8, three sealing rings 9, a screw plug 10, three nuts 11, three glands 12, a groove 121, two bolts 13, three bolts 14, a tube body 15, a tube body 151, a ring 152, a retaining ring 153, a flange 16, and a gap area 17. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] See also Figures 1 to 4 A pipe flange weld strength detection device includes a bolt 1, a locking cover 3, a gland 6, a welding cylinder 7, a second gland 8, a third gland 12, a pipe body 15 and a flange 16;

[0028] A flange 16 is provided around the outer side of the tube body 15, the outer side of the left end of the tube body 15 is connected to the inner side of the welding cylinder 7, and a gap area 17 is provided between the tube body 15 and the welding cylinder 7. The right side of the welding cylinder 7 is connected to the left side of the second pressure cover 8, the right side of the second pressure cover 8 is connected to the left side of the flange 16, the right side of the flange 16 is connected to the third pressure cover 12, the inner ring of the third pressure cover 12 is connected to the outer side of the tube body 15, the left end of the welding cylinder 7 is connected to the right end of the first pressure cover 6, the left side of the first pressure cover 6 is connected to the right end of the locking cover 3 by a bolt 1, and an interface groove 74 is provided on the top of the welding cylinder 7.

[0029] The flange 16 is arranged to be tilted upward to the right along the surface of the tube body 15 , and the second and third glands 8 and 12 are tilted in the same direction as the flange 16 with the same inclination angle. The second and third glands 8 and 12 have the same diameter, and the diameter of the second and third glands 8 and 12 is larger than the diameter of the flange 16 .

[0030] The right side of the three-pressure cover 12 is threadedly matched with multiple three-bolts 14. One end of the three-bolt 14 passes through the three-pressure cover 12 and the second pressure cover 8 and extends to the left side of the second pressure cover 8. One end of the three-bolt 14 extending to the left side of the second pressure cover 8 is connected to the three nuts 11.

[0031] A groove 121 is provided on the left side of the three-pressure cover 12, and a flange 16 is embedded in the inner wall of the groove 121. Three sealing rings 9 are provided between the flange 16 and the second pressure cover 8. A plurality of second bolts 13 are inserted around the side of the three-pressure cover 12. The plurality of second bolts 13 are arranged on the inner side of the plurality of third bolts 14. One end of the second bolt 13 passes through the three-pressure cover 12 and is threadedly engaged with the flange 16.

[0032] The right end of the bolt 1 passes through the locking cover 3 and a pressure cover 6 in sequence, and the side of the bolt 1 that passes through the right end of the pressure cover 6 is threadedly engaged with a nut 2.

[0033] The locking cover plate 3 includes a side plate 31 and a connecting ring 34. The right side of the connecting ring 34 is connected to the left side of the side plate 31. Three support plates 32 are provided on the outside of the connecting ring 34. The three support plates 32 are equidistantly spaced around the center of the connecting ring 34. The three support plates 32 are all connected to the side plate 31. A through hole 33 is opened on the front of the side plate 32.

[0034] A sealing ring 4 and a second sealing ring 5 are sequentially arranged between the right side of the side plate 31 and the first gland 6. The diameters of the side plate 31 and the first gland 6 are the same, and the diameters of the first gland 6, the first sealing ring 4, and the second sealing ring 5 decrease in sequence.

[0035] The interface groove 74 is connected to the gap area 17, a water inlet 73 is provided at the bottom of the welding cylinder 7, and a water outlet 71 is provided on the left side of the welding cylinder 7 and the locking cover plate 3. The water inlet 73, the water inlet 71 and the gap area 17 are connected to each other, and a block 72 is engaged with the inner wall of the interface groove 74.

[0036] A screw plug 10 is inserted into the water inlet 71 on the left side of the locking cover plate 3 , and a reinforcement ring 75 is provided on the outer side of the welding cylinder 7 .

[0037] The tube body 15 includes a tube body 151, the left side of the tube body 151 is connected to the right side of the circular ring 152, and the left side of the circular ring 152 is connected to the right side of the snap ring 153. The tube body 151, the circular ring 152, and the snap ring 153 have the same diameter. An annular groove 35 is opened on the right side of the locking cover plate 3, and the snap ring 153 is snap-fitted with the annular groove 35.

[0038] The principle of the present invention is described as follows: first, the tube body 15 is embedded in the welded cylinder 7, and then a sealing ring 4 and a second sealing ring 5 are installed in a preset sealing groove on a gland 6, and then the side plate 31 and the gland 6 are fastened and sealed by the cooperation of a bolt 1 and a nut 2, and then the second gland 8 and the third gland 12 are fastened and sealed by three nuts 11 and three bolts 14, and then the three glands 12 are connected to the flange 16 by two bolts 13. After the entire device is installed, remove the block 72, connect the pressure gauge at the interface groove 74, and then inject water into the water inlet 73, and test the pressure of the entire device through the pressure gauge. After the test is completed, open the screw plug 10 to drain the water.

[0039] Example 1:

[0040] A pipe flange weld strength detection device, the pipe flange weld strength detection device includes a bolt 1, a locking cover 3, a pressure cover 6, a welding cylinder 7, two pressure covers 8, three pressure covers 12, a pipe body 15 and a flange 16; the outer side of the pipe body 15 is surrounded by a flange 16, the outer side of the left end of the pipe body 15 is connected to the inner side of the welding cylinder 7, and there is a gap area 17 between the pipe body 15 and the welding cylinder 7, the right side of the welding cylinder 7 is connected to the left side of the second pressure cover 8, the right side of the second pressure cover 8 is connected to the left side of the flange 16, the right side of the flange 16 is connected to the three pressure covers 12, the inner ring of the three pressure covers 12 is connected to the outer side of the pipe body 15, the left end of the welding cylinder 7 is connected to the right end of the first pressure cover 6, the left side of the first pressure cover 6 and the right end of the locking cover 3 are connected by a bolt 1, and the top of the welding cylinder 7 is provided with an interface groove 74.

[0041] During application: first, embed the tube body 15 into the welding cylinder 7, then tighten and seal the locking cover 3 and the first pressure cover 6, and then tighten and seal the second pressure cover 8 and the third pressure cover 12. After the entire device is installed, connect the pressure gauge at the interface groove 74, and then inject water into the welding cylinder 7. Use the pressure gauge to test the pressure of the entire device. After the test is completed, open the welding cylinder 7 to drain the water.

[0042] Example 2:

[0043] Example 2 is basically the same as Example 1, except that:

[0044] A pipe flange weld strength detection device, wherein the flange 16 is arranged to be tilted to the upper right along the surface of the pipe body 15, the second gland 8, the third gland 12 and the flange 16 are tilted in the same direction with the same tilt angle, the second gland 8 and the third gland 12 have the same diameter, and the diameter of the second gland 8 and the third gland 12 is larger than the diameter of the flange 16; the right side of the three glands 12 is threadedly matched with a plurality of three bolts 14, one end of the three bolts 14 passes through the three glands 12 and the second gland 8 and extends to the left side of the second gland 8, and one end of the three bolts 14 extending to the left side of the second gland 8 is connected with the three nuts 11; a groove 121 is provided on the left side of the three glands 12, and the inner wall of the groove 121 is embedded with the flange 16, and a screw thread is provided between the flange 16 and the second gland 8. Three sealing rings 9 are provided, and multiple two-bolts 13 are inserted around the side of the three-pressure cover 12. Multiple two-bolts 13 are arranged on the inner side of multiple three-bolts 14. One end of the two-bolt 13 passes through the three-pressure cover 12 and is threadedly matched with the flange 16. Two types of bolt holes are provided on the three-pressure cover 12, which are respectively connected to the two bolts 13 and the three bolts 14. A stepped hole is provided inside. The adjusting bolts and the two bolts 13 are screwed into the three-pressure cover 12 to tighten the flange 16 to fine-tune the compression amount of the three sealing rings 9 for sealing; the welding cylinder 7 is welded to the first pressure cover 6 and the second pressure cover 8 respectively, and the second pressure cover 8 is then connected to the three pressure covers 12 through three nuts 11 and three bolts 14. The first pressure cover 6 and the locking cover plate 3 are connected through a bolt 1 and a nut 2.

[0045] Example 3:

[0046] Example 3 is basically the same as Example 2, except that:

[0047] A pipe flange weld strength detection device, wherein the right end of a bolt 1 sequentially penetrates a locking cover plate 3 and a pressure cover 6, and one side of a bolt 1 that penetrates to the right end of a pressure cover 6 is threadedly matched with a nut 2; the locking cover plate 3 includes a side plate 31 and a connecting ring 34, the right side of the connecting ring 34 is connected to the left side of the side plate 31, and three support plates 32 are provided on the outside of the connecting ring 34, and the three support plates 32 are equidistantly spaced with the center of the connecting ring 34 as the center. The three support plates 32 are all connected to the side plate 31, and the positive ends of the side plates 32 A through hole 33 is provided on the surface; a sealing ring 4 and a second sealing ring 5 are arranged in sequence between the right side of the side plate 31 and a pressure cover 6, and the sealing ring 4 and the second sealing ring 5 are installed in the preset sealing groove on the pressure cover 6 to seal and prevent external leakage. A reinforcing rib structure, a lifting hole and a drain hole are provided on the left end, which are sealed by a screw plug 10 during the pressure test, and water is drained through the drain hole after the test. The diameter of the side plate 31 is the same as that of the pressure cover 6, and the diameters of the pressure cover 6, the sealing ring 4 and the second sealing ring 5 decrease in sequence.

[0048] Example 4:

[0049] Example 4 is basically the same as Example 3, except that:

[0050] A device for detecting the weld strength of a pipe flange, wherein an interface groove 74 is provided on the top of the welding cylinder 7, the interface groove 74 is connected to the gap area 17, a water inlet 73 is provided at the bottom of the welding cylinder 7, and a water outlet 71 is provided on the left side of the welding cylinder 7 and the locking cover plate 3, and the water inlet 73, the water inlet 71 and the gap area 17 are connected to each other, and a block 72 is engaged with the inner wall of the interface groove 74; a screw plug 10 is inserted at the water inlet 71 corresponding to the left side of the locking cover plate 3, and a reinforcement ring 75 is provided on the outside of the welding cylinder 7; the pipe body 15 includes a pipe body 151, the left side of the pipe body 151 is connected to the right side of the circular ring 152, the left side of the circular ring 152 is connected to the right side of the snap ring 153, the pipe body 151, the circular ring 152 and the snap ring 153 have the same diameters, and an annular groove 35 is provided on the right side of the locking cover plate 3, and the snap ring 153 is snap-fitted with the annular groove 35.

[0051] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. A pipe flange weld strength detection device, characterized in that The pipe body flange weld strength detection device comprises a bolt (1), a locking cover (3), a gland (6), a welding cylinder (7), a second gland (8), a third gland (12), a pipe body (15) and a flange (16); The outer side of the tube body (15) is surrounded by a flange (16), the outer side of the left end of the tube body (15) is connected to the inner side of the welding cylinder (7), a gap area (17) is present between the tube body (15) and the welding cylinder (7), the right side of the welding cylinder (7) is connected to the left side of the second pressure cover (8), the right side of the second pressure cover (8) is connected to the left side of the flange (16), the right side of the flange (16) is connected to the third pressure cover (12), the inner ring of the third pressure cover (12) is connected to the outer side of the tube body (15), the left end of the welding cylinder (7) is connected to the right end of the first pressure cover (6), the left side of the first pressure cover (6) is connected to the right end of the locking cover (3) by a bolt (1), and the top of the welding cylinder (7) is provided with an interface groove (74); The right side of the three glands (12) is threadedly engaged with a plurality of three bolts (14), one end of the three bolts (14) passes through the three glands (12) and the second gland (8) and extends to the left side of the second gland (8), and one end of the three bolts (14) extending to the left side of the second gland (8) is connected to the three nuts (11); A groove (121) is provided on the left side of the three-pressure cover (12), a flange (16) is embedded in the inner wall of the groove (121), three sealing rings (9) are provided between the flange (16) and the two-pressure cover (8), a plurality of two-bolts (13) are inserted around the side of the three-pressure cover (12), the plurality of two-bolts (13) are located on the inner side of the plurality of three-bolts (14), and one end of the two-bolts (13) passes through the three-pressure cover (12) and is threadedly engaged with the flange (16); The right end of the bolt (1) passes through the locking cover (3) and a pressure cover (6) in sequence, and the side of the bolt (1) that passes through the right end of the pressure cover (6) is threadedly engaged with a nut (2).

2. A pipe flange weld strength detection device according to claim 1, characterized in that: The flange (16) is arranged to be tilted upward to the right along the surface of the tube body (15); the second gland (8) and the third gland (12) are arranged to be tilted in the same direction as the flange (16) with the same tilt angle; the second gland (8) and the third gland (12) have the same diameter; and the diameter of the second gland (8) and the third gland (12) is larger than the diameter of the flange (16).

3. The pipe flange weld strength detection device according to claim 1, characterized in that: The locking cover plate (3) includes a side plate (31) and a connecting ring (34). The right side of the connecting ring (34) is connected to the left side of the side plate (31). Three support plates (32) are provided on the outside of the connecting ring (34). The three support plates (32) are equidistantly spaced around the center of the connecting ring (34). The three support plates (32) are all connected to the side plate (31). A through hole (33) is provided on the front of the support plate (32).

4. A pipe flange weld strength detection device according to claim 3, characterized in that: A sealing ring (4) and a second sealing ring (5) are sequentially arranged between the right side of the side plate (31) and the first gland (6). The diameters of the side plate (31) and the first gland (6) are the same, and the diameters of the first gland (6), the first sealing ring (4), and the second sealing ring (5) decrease in sequence.

5. The pipe flange weld strength detection device according to claim 1, characterized in that: The interface groove (74) is in communication with the gap area (17), a water inlet (73) is provided at the bottom of the welding cylinder (7), a water outlet (71) is provided on the left side of the welding cylinder (7) and the locking cover plate (3), the water inlet (73), the water outlet (71) and the gap area (17) are in communication with each other, and a card block (72) is engaged with the inner wall of the interface groove (74).

6. The pipe flange weld strength detection device according to claim 5, characterized in that: A screw plug (10) is inserted into the left side of the locking cover plate (3) corresponding to the water outlet (71), and a reinforcement ring (75) is provided on the outside of the welding cylinder (7).

7. The pipe flange weld strength detection device according to claim 1, characterized in that: The tube body (15) comprises a tube body (151), the left side of the tube body (151) is connected to the right side of the circular ring (152), and the left side of the circular ring (152) is connected to the right side of the snap ring (153). The tube body (151), the circular ring (152), and the snap ring (153) have the same diameter. An annular groove (35) is provided on the right side of the locking cover plate (3), and the snap ring (153) is snap-fitted with the annular groove (35).

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