Composite pipe flanged joint

Abstract

The utility model relates to the technical field of pipe joint more specifically, relate to a kind of composite pipe flanging joint, including inner layer sealing assembly, first sleeve, outer layer sealing assembly, locking assembly and two root pipe materials with flanging, the flanging of two root pipe materials is oppositely arranged, the first sleeve is connected with the pipe material, two groups of first sleeve abut, the inner layer sealing assembly is located between the first sleeve and the pipe material, the locking assembly connects two groups of first sleeve, the outer layer sealing assembly is located between the locking assembly and the first sleeve.The utility model is prevented by setting inner layer sealing assembly pipe material internal transport medium leakage, while setting outer layer sealing assembly avoids the clean transport environment in pipe material internal is polluted by outside, to enhance the sealing effect of composite pipe flanging joint.

Description

Technical Field

[0001] This utility model relates to the technical field of pipe fittings, and more specifically, to a composite pipe flange fitting. Background Technology

[0002] In the field of industrial fluid transportation, such as petrochemicals, municipal water supply and drainage, and shipbuilding, composite pipes are widely used because they combine the strength of metallic materials with the corrosion resistance of non-metallic materials. The reliability of the connections between these composite pipes is directly related to the safety and sealing of the entire pipeline system, which is a key technical issue that the industry has long been concerned with.

[0003] Existing technology discloses a convenient pipe fitting, comprising two opposing connecting sleeves. Its characteristic is that a step larger than the diameter of the connecting sleeves is provided at the joint of the two connecting sleeves. A flange, which can be fitted onto the connecting sleeve, is provided at the outer end of the step. An annular track is provided between the flange and the step of the connecting sleeve, and ball bearings are installed within the annular track. However, this connection method has poor sealing performance and is prone to leakage when transporting media. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of poor sealing effect of existing composite pipe flange joints, and to provide a composite pipe flange joint that enhances the sealing effect of composite pipe flange joints.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A composite pipe flange joint is provided, comprising an inner sealing assembly, a first sleeve, an outer sealing assembly, a locking assembly, and two pipes with flanges. The flanges of the two pipes are arranged opposite to each other. The first sleeve is connected to the pipes, and two sets of the first sleeves abut against each other. The inner sealing assembly is located between the first sleeve and the pipes. The locking assembly connects the two sets of the first sleeves. The outer sealing assembly is located between the locking assembly and the first sleeve.

[0006] This utility model discloses a composite pipe flanged joint. During connection, a first sleeve and an inner sealing component are installed on both pipes, and an outer sealing component is installed on the first sleeve of both pipes. The flanges of the two pipes are then positioned opposite each other, and a locking component is used to connect and lock the two pipes, causing the first sleeves of the two pipes to abut against each other. The inner sealing component prevents leakage of the transported medium inside the pipes, while the outer sealing component prevents external contamination of the clean transport environment inside the pipes, thereby enhancing the sealing effect of the composite pipe flanged joint.

[0007] Furthermore, the pipe includes a flange and a pipe body, the pipe body being connected to the flange, and the first sleeve being connected to the ends of the pipe body and the flange. The first sleeve is stably installed on the outside of the flange and part of the pipe body.

[0008] Furthermore, the first sleeve includes a first connecting portion, a sealing portion, a second connecting portion, and a bending portion connected in sequence. The first connecting portion is connected to the pipe body. The inner sealing assembly is located between the sealing portion and the pipe. The second connecting portion is connected to the end of the flange. The outer sealing assembly is located between the locking assembly and the second connecting portion. The bending portion is connected to the inner side of the flange. By providing the bending portion, the flange rebound of the pipe is prevented.

[0009] Furthermore, the inner sealing assembly includes a second sleeve and an inner sealing ring both sleeved on the outside of the tube body. The outer side of the inner sealing ring abuts against the sealing portion, and both ends of the inner sealing ring abut against the second sleeve and the first sleeve, respectively. The inner sealing ring is compressed radially and axially to enhance the sealing effect.

[0010] Furthermore, the second sleeve includes a connected extrusion section and a transmission section. The extrusion section is sleeved outside the tube body and abuts against the inner sealing ring. The flange has an inclined surface, and the transmission section has an inclined mating surface that mates with the inclined surface. After the second sleeve is installed, the second sleeve and the tube are flanged together, giving the tube a flange. During flangering, the inclined surface acts on the inclined mating surface, causing the second sleeve to move towards the inner sealing ring and axially compress the inner sealing ring, enhancing the sealing effect.

[0011] Furthermore, it also includes a wireless thickness gauge probe, which penetrates the first connection portion and abuts against the pipe body. By setting up the wireless thickness gauge probe, it is convenient to subsequently monitor the condition inside the pipe at the joint in real time, thereby facilitating the rapid location of the faulty joint.

[0012] Furthermore, the locking assembly includes a third sleeve and a fastening assembly. The third sleeve is fitted over the two sets of first sleeves, the outer sealing assembly is located between the third sleeve and the first sleeves, and the two ends of the fastening assembly are respectively installed at the two ends of the two sets of first sleeves. The sealing effect is enhanced by radially pressing the outer sealing assembly with the third sleeve. The fastening assembly securely connects the two pipes.

[0013] Furthermore, the fastening assembly includes two sets of locking caps, each set of which is threaded to both ends of the third sleeve. Two sets of first sleeves are located between the two sets of locking caps. After the third sleeve is installed, the two sets of locking caps are threaded to both ends of the third sleeve, causing them to abut against the outer sides of the two sets of first sleeves, thus axially pressing the two sets of first sleeves together and securely connecting the two pipes.

[0014] Furthermore, the fastening assembly includes two sets of connecting discs and fasteners. The two ends of the fasteners are respectively connected to the two sets of connecting discs, and the two sets of first sleeves are located between the two sets of connecting discs. After installing the third sleeve, the two sets of connecting discs are respectively abutted against the outer sides of the two sets of first sleeves, and the fasteners are used to connect the two sets of connecting discs, thereby pressing the two sets of first sleeves axially and securely connecting the two pipes.

[0015] Furthermore, it also includes a sealing ring, which is located between the two sets of first sleeves. By providing the sealing ring, the two sets of first sleeves respectively fit against both ends of the sealing ring, further enhancing the sealing effect.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. The present invention relates to a composite pipe flange joint, which prevents leakage of the transported medium inside the pipe by setting an inner sealing component, and at the same time sets an outer sealing component to prevent the clean transport environment inside the pipe from being contaminated by the outside, thereby enhancing the sealing effect of the composite pipe flange joint.

[0017] 2. The composite pipe flange joint of this utility model prevents the pipe flange from springing back by setting a bending part on the first sleeve, and at the same time, a sealing ring is set so that the two sets of first sleeves respectively fit the two ends of the sealing ring, thereby further enhancing the sealing effect.

[0018] 3. The composite pipe flange joint of this utility model further enhances the sealing effect by extruding the inner sealing ring radially and axially and the outer sealing component radially.

[0019] 4. The composite pipe flange joint of this utility model is equipped with a wireless thickness measuring probe, which is brought into contact with the pipe body to facilitate real-time detection of the pipe inside the joint, thereby facilitating the rapid location of faulty joints. Attached Figure Description

[0020] Figure 1 This is a first-view structural schematic diagram of the composite pipe flange joint of this utility model; Figure 2 This is a second-view structural schematic diagram of the composite pipe flange joint of this utility model; Figure 3 yes Figure 2Enlarged view of the structure at point A in the middle; Figure 4 yes Figure 2 Enlarged view of the structure at point B; Figure 5 This is a schematic diagram of the composite pipe flange joint in Example 5.

[0021] In the attached diagram: 100, pipe; 110, flange; 111, inclined surface; 120, pipe body; 200, inner sealing assembly; 210, second sleeve; 211, extrusion part; 212, transmission part; 220, inner sealing ring; 300, first sleeve; 310, first connecting part; 320, sealing part; 330, second connecting part; 340, bending part; 400, outer sealing assembly; 500, locking assembly; 510, third sleeve; 520, fastening assembly; 521, locking cover; 522, connecting plate; 523, fastener; 600, wireless thickness probe; 700, sealing ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. The present utility model will be further described below with reference to specific embodiments. The accompanying drawings are only for illustrative purposes and represent only schematic diagrams, not actual pictures, and should not be construed as limiting the present patent. In order to better illustrate the embodiments of the present utility model, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0023] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. Furthermore, if the embodiments of this utility model involve descriptions such as "first" and "second," these descriptions are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include at least one of those features. In addition, the meaning of "and / or" in the whole text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B.

[0024] Example 1 This embodiment is a first embodiment of a composite pipe flange joint, such as... Figure 1 and Figure 2 As shown, the device includes an inner sealing assembly 200, a first sleeve 300, an outer sealing assembly 400, a locking assembly 500, and two pipes 100 with flanges 110. The flanges 110 of the two pipes 100 are arranged opposite each other. The first sleeve 300 is connected to the pipes 100, and the two sets of first sleeves 300 abut against each other. The inner sealing assembly 200 is located between the first sleeves 300 and the pipes 100. The locking assembly 500 connects the two sets of first sleeves 300. The outer sealing assembly 400 is located between the locking assembly 500 and the first sleeves 300.

[0025] like Figure 3 and Figure 4 As shown, the pipe 100 includes a flange 110 and a pipe body 120, with the pipe body 120 connected to the flange 110. A first sleeve 300 is connected to the ends of the pipe body 120 and the flange 110. The first sleeve 300 is stably installed on the outside of the flange 110 and part of the pipe body 120.

[0026] Specifically, the flanging process for composite pipes is as follows: First, the ends of the composite pipes are heated by the heating plate of the flanging equipment. After the pipes reach the set temperature after a certain heating time, the heating plate is removed. Then, using different molds and under the action of the hydraulic system of the flanging equipment, the ends of the composite pipes are flanged layer by layer. First, the outer PE material is applied, followed by the reinforcing layer, then the inner PE material, and finally the wear-resistant layer. After each layer of flanging is completed, the composite pipes are cooled and shaped by air blowing. The final composite pipe forms the flanged edge 110, while the unflanged portion forms the pipe body 120.

[0027] like Figure 3 and Figure 4 As shown, the first sleeve 300 includes a first connecting part 310, a sealing part 320, a second connecting part 330, and a bending part 340 connected in sequence. The first connecting part 310 is connected to the pipe body 120. The inner sealing assembly 200 is located between the sealing part 320 and the pipe 100. The second connecting part 330 is connected to the end of the flange 110. The outer sealing assembly 400 is located between the locking assembly 500 and the second connecting part 330. The bending part 340 is connected to the inner side of the flange 110. That is, the sealing part 320, the second connecting part 330, and the bending part 340 surround the flange 110, and the flange 110 is located between the sealing part 320 and the bending part 340. By setting the bending part 340, the first sleeve 300 can better clamp the flange 110, preventing the flange 110 from springing back after long-term use, increasing the service life of the joint and the pipe 100, and saving costs. In other embodiments, to further prevent the flange 110 of the tube 100 from springing back, the bend 340 has a barb, and the inner side of the flange 110 has a barb groove for engaging with the barb.

[0028] The locking assembly 500 includes a third sleeve 510 and a fastening assembly 520. The third sleeve 510 is fitted over the two sets of first sleeves 300. The outer sealing assembly 400 is located between the third sleeve 510 and the first sleeves 300. The two ends of the fastening assembly 520 are respectively installed at the two ends of the two sets of first sleeves 300. The outer sealing assembly 400 is radially compressed by the third sleeve 510 to enhance the sealing effect. The fastening assembly 520 securely connects the two pipes 100. In this embodiment, the outer sealing assembly 400 can be an outer sealing ring, which is an O-ring. Specifically, the second connecting part 330 has an annular sealing groove on its outer side, and the outer sealing ring is fitted inside the sealing groove.

[0029] It also includes a sealing ring 700, which is located between the two sets of first sleeves 300. By setting the sealing ring 700, the two sets of first sleeves 300 are respectively fitted to both ends of the sealing ring 700, thereby further enhancing the sealing effect. Specifically, the sealing ring 700 has raised textures at both ends, which allows the sealing ring 700 to form a tight fit with the two sets of first sleeves 300, thereby further enhancing the sealing effect.

[0030] The working principle of a composite pipe flange joint in this embodiment is as follows: During connection, the pipe 100 is initially without the flange 110, and the first sleeve 300 is a straight cylindrical structure with a step. The first connecting part 310 of the first sleeve 300 is crimped into the pipe 100 using a crimping device (existing equipment, which will not be described in detail here). At this time, the first connecting part 310 is crimped into the pipe 100. The sealing part 320, the second connecting part 330, and the bending part 340 are straight cylindrical, and their inner sides have a sealing gap with the outer wall of the pipe 100. Then, the inner sealing component 200 is placed in the sealing gap, so that the inner sealing component 200 is located between the sealing part 320 and the outer wall of the pipe 100, forming an inner seal. Next, the pipe 100 with the first sleeve 300 and the inner sealing component 200 installed is moved to the flange device (existing equipment, which will not be described in detail here). After the flanging equipment preheats the end of the pipe 100, it performs a first flanging of the pipe 100, the first sleeve 300, and the inner sealing assembly 200 using a mold. After the first flanging, the pipe 100 forms a flanged edge 110, and the unflanged part is the pipe body 120. The first sleeve 300 is then flanged a second time, with the second connecting part 330 abutting against the end of the flanged edge 110. Finally, the first sleeve 300 is flanged a third time, connecting the bent part 340 to the inner side of the flanged edge 110, i.e., the barb engages in the barb groove. The three flanging processes ensure that the first sleeve 300 surrounds the outer side of the flanged edge 110, as shown below. Figure 2 As shown. In this embodiment, the flange is a right-angle flange, but in other embodiments, it can also be a flange at other angles. It is not limited here that the flange must be a right angle. Then, the outer sealing ring is fitted into the sealing groove outside the second connecting part 330, and the sealing ring 700 is placed between the two first sleeves 300. Next, the third sleeve 510 is fitted over the two first sleeves 300, so that the outer sealing ring is located between the second connecting part 330 and the third sleeve 510, forming an outer seal. Finally, the two ends of the fastening assembly 520 are respectively installed at the two ends of the two sets of first sleeves 300, so that the two sets of first sleeves 300 compress the sealing ring 700, firmly connecting the two pipes 100. By setting the inner sealing assembly 200 to prevent leakage of the transport medium inside the pipe 100, and by setting the outer sealing assembly 400 to prevent the clean transport environment inside the pipe 100 from being contaminated by the outside, the sealing effect of the composite pipe flange joint is enhanced.

[0031] Example 2 This embodiment is the second embodiment of the composite pipe flange joint. This embodiment is similar to the first embodiment, except that, as shown in the example... Figure 3 As shown, the inner sealing assembly 200 includes a second sleeve 210 and an inner sealing ring 220 both sleeved outside the tube body 120. The outer side of the inner sealing ring 220 abuts against the sealing part 320, and the two ends of the inner sealing ring 220 abut against the second sleeve 210 and the first sleeve 300, respectively. In this embodiment, the inner sealing ring 220 is an O-ring. The inner sealing ring 220 is compressed radially and axially to enhance the sealing effect.

[0032] like Figure 4 As shown, the second sleeve 210 includes a connecting pressing part 211 and a transmission part 212. The pressing part 211 is sleeved outside the tube body 120 and abuts against the inner sealing ring 220. The flange 110 has an inclined surface 111, and the transmission part 212 has an inclined mating surface that cooperates with the inclined surface 111. During the first flange turning, the inclined surface 111 acts on the inclined mating surface, causing the second sleeve 210 to move towards the inner sealing ring 220 and axially press the inner sealing ring 220, thereby enhancing the sealing effect.

[0033] Example 3 This embodiment is the third embodiment of the composite pipe flange joint. This embodiment is similar to the first embodiment, except that, as Figure 1 and Figure 2 As shown, it also includes a wireless thickness gauge 600, which penetrates the first connecting part 310 and abuts against the tube body 120. Specifically, the first connecting part 310 has a through hole, and the wireless thickness gauge 600 is installed at the through hole and fits against the outer surface of the tube body 120.

[0034] By setting up the wireless thickness probe 600, it is easy to use an ultrasonic thickness gauge to wirelessly connect with the wireless thickness probe 600 to detect the condition inside the pipe at the joint in real time, and to detect the degree of wear of the wear-resistant layer of the composite pipe, thereby facilitating the rapid location of the faulty joint.

[0035] Specifically, the ultrasonic thickness gauge measures thickness based on the principle of ultrasonic pulse reflection. When the ultrasonic pulse emitted by the wireless thickness probe 600 passes through the pipe wall and reaches the inner cavity, it sends a thickness information back to the control and detection center. The computer control system automatically calculates whether this thickness information is within the preset wall thickness range. If it is, it automatically skips the problem; if a problem occurs, it issues an alarm prompting for repair, clearly displaying which joint has the problem. Operators can accurately determine the location of the faulty joint and then carry out repairs. This significantly reduces the time workers spend troubleshooting, saves costs, and improves work efficiency.

[0036] Example 4 This embodiment is the fourth embodiment of the composite pipe flange joint. This embodiment is similar to Embodiment 1, except that, as Figure 4 As shown, the fastening assembly 520 includes two sets of locking covers 521, which are threaded to both ends of the third sleeve 510. Two sets of first sleeves 300 are located between the two sets of locking covers 521. After the third sleeve 510 is installed, the two sets of locking covers 521 are threaded to both ends of the third sleeve 510, causing the two sets of locking covers 521 to abut against the outer sides of the two sets of first sleeves 300, thus axially pressing the two sets of first sleeves 300 together and securely connecting the two pipes.

[0037] Specifically, as shown in the figure, the cross-section of the two sets of locking covers 521 is L-shaped, the third sleeve 510 has external threads, one end of the two sets of locking covers 521 has internal threads that mate with the external threads of the third sleeve 510, and the other end is used to clamp the two sets of first sleeves 300.

[0038] Example 5 This embodiment is the fourth embodiment of the composite pipe flange joint. This embodiment is similar to Embodiment 1, except that, as Figure 5 As shown, the fastening assembly 520 includes two sets of connecting discs 522 and fasteners 523. The two ends of the fasteners 523 are respectively connected to the two sets of connecting discs 522, and the two sets of first sleeves 300 are located between the two sets of connecting discs 522.

[0039] After the third sleeve 510 is installed, the two sets of connecting discs 522 are respectively abutted against the outside of the two sets of first sleeves 300, that is, the two sets of first sleeves 300 are located between the two sets of connecting discs 522. The two sets of connecting discs 522 are connected by fasteners 523, and the two sets of first sleeves 300 are pressed axially, thereby firmly connecting the two pipes.

[0040] Specifically, the connecting plate 522 is a flange, and the fastener 523 includes bolts and nuts. The bolts pass through two sets of flanges, with the large end of the bolt abutting against the outside of one set of flanges and the threaded end of the bolt located outside the other set of flanges. The nuts are threadedly connected to the threaded end of the bolts and abut against the outside of the other set of flanges.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0042] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A composite pipe flange joint, characterized in that, The device includes an inner sealing assembly (200), a first sleeve (300), an outer sealing assembly (400), a locking assembly (500), and two pipes (100) with flanges (110). The flanges (110) of the two pipes (100) are arranged opposite each other. The first sleeve (300) is connected to the pipes (100), and the two sets of first sleeves (300) abut against each other. The inner sealing assembly (200) is located between the first sleeve (300) and the pipes (100). The locking assembly (500) connects the two sets of first sleeves (300). The outer sealing assembly (400) is located between the locking assembly (500) and the first sleeve (300).

2. The composite pipe flared joint of claim 1, wherein, The pipe (100) includes a flange (110) and a pipe body (120), the pipe body (120) being connected to the flange (110), and the first sleeve (300) being connected to the ends of the pipe body (120) and the flange (110).

3. The composite pipe flange joint according to claim 2, characterized in that, The first sleeve (300) includes a first connecting part (310), a sealing part (320), a second connecting part (330), and a bending part (340) connected in sequence. The first connecting part (310) is connected to the tube body (120). The inner sealing assembly (200) is located between the sealing part (320) and the tube (100). The second connecting part (330) is connected to the end of the flange (110). The outer sealing assembly (400) is located between the locking assembly (500) and the second connecting part (330). The bending part (340) is connected to the inner side of the flange (110).

4. The composite pipe flange joint according to claim 3, characterized in that, The inner sealing assembly (200) includes a second sleeve (210) and an inner sealing ring (220) both sleeved outside the tube body (120). The outer side of the inner sealing ring (220) abuts against the sealing part (320), and the two ends of the inner sealing ring (220) abut against the second sleeve (210) and the first sleeve (300) respectively.

5. The composite pipe flange joint according to claim 4, characterized in that, The second sleeve (210) includes a connected extrusion part (211) and a transmission part (212). The extrusion part (211) is sleeved on the outside of the tube body (120). The extrusion part (211) abuts against the inner sealing ring (220). The flange (110) is provided with an inclined surface (111). The transmission part (212) is provided with an inclined mating surface that cooperates with the inclined surface (111).

6. The composite pipe flange joint according to claim 3, characterized in that, It also includes a wireless thickness probe (600), which penetrates the first connecting part (310) and abuts against the tube body (120).

7. The composite pipe flange joint according to any one of claims 1 to 6, characterized in that, The locking assembly (500) includes a third sleeve (510) and a fastening assembly (520). The third sleeve (510) is sleeved on the outside of the two sets of first sleeves (300). The outer sealing assembly (400) is located between the third sleeve (510) and the first sleeve (300). The two ends of the fastening assembly (520) are respectively installed on the two ends of the two sets of first sleeves (300).

8. The composite pipe flange joint according to claim 7, characterized in that, The fastening assembly (520) includes two sets of locking caps (521), which are threaded to both ends of the third sleeve (510) respectively, and the two sets of first sleeves (300) are located between the two sets of locking caps (521).

9. The composite pipe flange joint according to claim 7, characterized in that, The fastening assembly (520) includes two sets of connecting discs (522) and fasteners (523). The two ends of the fasteners (523) are respectively connected to the two sets of connecting discs (522), and the two sets of first sleeves (300) are located between the two sets of connecting discs (522).

10. The composite pipe flange joint according to any one of claims 1 to 6, characterized in that, It also includes a sealing ring (700) located between the two sets of the first sleeves (300).

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