Pressing tool for steel skeleton plastic composite electric smelting elbow pipe fitting

Abstract

The invention discloses a steel skeleton plastic composite electric smelting elbow pipe fitting pressing tool, and relates to the technical field of pipe fitting detection, the steel skeleton plastic composite electric smelting elbow pipe fitting pressing tool comprises a fixed sleeve, the fixed sleeve is sleeved with an elbow pipe fitting, center shafts on the two sides of the fixed sleeve are coaxial with center shafts on the two sides of the elbow pipe fitting respectively, and two fastening assemblies are arranged on the two sides of the fixed sleeve respectively. The elbow pipe fitting can be fixedly connected with the fixing sleeve, a pressing cavity is formed between the two fastening assemblies and the fixing sleeve and between the two fastening assemblies and the elbow pipe fitting, the sealing assemblies are connected with the fastening assemblies and the fixing sleeve, the pressing cavity can be sealed, and the two pressing pipes are arranged on the inner wall of the fixing sleeve and both connected with the pressing cavity. According to the pressing tool for the steel skeleton plastic composite electric smelting elbow pipe fitting, the elbow pipe fitting can be stably fixed and reliably sealed through the fixing sleeve, the fastening assembly, the sealing assembly and the pressing pipe, and therefore the pressure bearing capacity of the elbow pipe fitting with the specification of DN700 or above can be detected.

Description

Technical Field

[0001] The invention relates to the technical field of pipe fitting detection, in particular to a steel skeleton plastic composite electric fusion elbow pipe fitting pressing tool. Background Art

[0002] The steel-reinforced plastic composite electric fusion series elbow pipe fittings with specifications of DN700 and above are available in two models: 11.25 degrees and 22.5 degrees. This is a new type of pipe fitting product. In order to test its pressure-bearing capacity, there is currently no matching pressure testing tooling, so the pressure-bearing performance of this product cannot be tested.

[0003] Steel-reinforced plastic composite electric fusion pipe fittings are widely used in engineering fields such as water supply and drainage, and gas transmission, due to their high strength, corrosion resistance, and convenient connection. To ensure the normal use of steel-reinforced plastic composite electric fusion pipe fittings, a pressure test tool is generally required to test the pressure bearing capacity of steel-reinforced plastic composite electric fusion pipe fittings.

[0004] However, currently, there is no dedicated pressure testing tool specifically designed for elbow fittings. While some custom-designed, non-standard pressure testing tools can adequately perform pressure tests on elbow fittings, the connection between the fitting and the tool is unstable during the pressure test. When internal pressure increases, the fitting may expand and deform, causing the seal between the tool and the fitting to fail. This prevents effective pressure from being applied to the fitting, making it impossible to accurately obtain pressure data. Summary of the Invention

[0005] The purpose of the present invention is to provide a steel skeleton plastic composite electric fusion elbow pipe fitting pressing tool. This steel skeleton plastic composite electric fusion elbow pipe fitting pressing tool can achieve stable fixation and reliable sealing of the elbow pipe fitting through a fixing sleeve, a fastening component, a sealing component and a pressing pipe, thereby realizing the detection of the pressure bearing capacity of elbow pipe fittings of DN700 and above.

[0006] The above-mentioned optimized structure of the present invention is achieved by the following technical solutions: a steel skeleton plastic composite electric fusion elbow pipe fitting pressing tool, comprising a fixed sleeve, the fixed sleeve is sleeved with the elbow pipe fitting, and the central axes on both sides of the fixed sleeve are respectively coaxial with the central axes on both sides of the elbow pipe fitting; Two fastening assemblies, the two fastening assemblies are respectively arranged on both sides of the fixing sleeve, which can realize the fixed connection between the elbow pipe fitting and the fixing sleeve, and a pressure cavity is formed between the two fastening assemblies and the fixing sleeve and the elbow pipe fitting; A sealing assembly, the sealing assembly being connected to the fastening assembly and the fixing sleeve to achieve sealing of the pressing chamber; Two pressure tubes are arranged on the inner wall of the fixed sleeve and are both connected to the pressure chamber.

[0007] In some embodiments, the fixing sleeve includes a connecting ring, the elbow pipe fitting is sleeved on the connecting ring, and the connecting ring is coaxially arranged with one side of the elbow pipe fitting; Angle-changing link, one side of the angle-changing link is coaxially arranged with the connecting ring, and the other side is coaxially arranged with one side of the elbow pipe fitting, and the inner walls of the connecting ring and the angle-changing link are both provided with the pressure pipe; A first fixing ring, the first fixing ring being coaxially arranged on the inner wall of the connecting ring close to the angle-changing link; The second fixing ring is coaxially arranged on the inner wall of the variable angle connecting ring close to the connecting ring, and is detachably connected to the first fixing ring.

[0008] In some embodiments, the fixing sleeve includes a positioning ring, and the positioning ring is coaxially arranged on a side of the connecting ring close to the variable angle link; A positioning groove is coaxially arranged on a side of the variable angle link close to the connecting ring and is plugged into and matched with the positioning ring, and the sealing assembly is provided between the positioning ring and the positioning groove.

[0009] In some embodiments, the fastening assembly includes a piston sleeve, the piston sleeve is coaxially arranged between the fixed sleeve and the elbow pipe fitting, and the sealing assembly is provided between the piston sleeve and the fixed sleeve and the elbow pipe fitting; A gland flange, which is sleeved on the fixed sleeve and connected to the piston sleeve, and is in contact with one side of the elbow pipe fitting; A claw flange is coaxially sleeved on the elbow pipe fitting and connected to the gland flange.

[0010] In some embodiments, the fastening assembly further comprises a first annular groove, the first annular groove being provided on a side of the piston sleeve close to the gland flange, and the sealing assembly being provided between the first annular groove and the outer wall of the fixing sleeve; A second annular groove is provided on a side of the piston sleeve close to the gland flange, and the sealing assembly is provided between the first annular groove and the inner wall of the elbow pipe fitting.

[0011] In some embodiments, the fastening assembly further includes a pressure ring, which is coaxially sleeved on the fixed sleeve, and two side surfaces of the pressure ring are respectively fitted on the sealing assembly in the second ring groove and the gland flange.

[0012] In some embodiments, the fastening assembly also includes a convex ring, which is arranged on the side of the gland flange close to the piston sleeve, and the elbow pipe fitting is coaxially sleeved on the convex ring, and the convex ring is in contact with the sealing assembly in the first ring groove on the side away from the gland flange.

[0013] In some embodiments, a latching tooth is provided on the inner wall of the claw flange, and the latching tooth engages with the external thread on the elbow pipe fitting.

[0014] In some embodiments, the fastening assembly further includes a limiting ring, which is coaxially arranged on the fixing sleeve and is arranged on a side of the piston sleeve away from the gland flange.

[0015] In some embodiments, the sealing component is an O-ring.

[0016] One or more of the above technical solutions in the embodiments of the present invention have at least the following technical effects or advantages: The present invention connects the connecting ring with the variable angle link to form a fixed sleeve coaxial with the elbow pipe fitting, realizes the fixed connection between the two through the fastening component, and forms a pressure chamber, realizes the sealing of the pressure chamber through the sealing component, and then realizes the transportation of the pressure medium through the pressure pipe, thereby realizing the detection of the pressure bearing capacity of elbow pipe fittings of DN700 and above.

[0017] The variable angle of the variable angle chain of the present invention is designed according to the angle of the elbow pipe fitting, and the connecting ring and the variable angle chain are detachably connected. When it is necessary to detect elbow pipe fittings of different angles, it is only necessary to replace the variable angle chain of the corresponding angle, without the need to redesign and manufacture a whole set of tooling, thereby achieving the compatible use of a set of tooling for elbow pipe fittings of various angles, meeting the detection needs of elbow pipe fittings of different specifications on the market, reducing detection costs, and improving detection efficiency.

[0018] The present invention features teeth on the inner wall of the jaw flange that engage with the external threads of the elbow fitting. This increases the contact area between the jaw flange and the elbow fitting. As the fitting expands outward during the pressure test, the engagement between the teeth and the fitting becomes tighter as pressure increases, preventing the elbow fitting from dislodging during the test and improving the pressure-bearing stability of the fixture. Compared to traditional fixtures, under the same pressure test conditions, this fixture can withstand higher pressures without causing the fitting to shift or fall out, ensuring the accuracy and safety of the pressure test.

[0019] The present invention provides a slidable piston sleeve between the fixed sleeve and the elbow pipe fitting, and provides a pressure ring and a convex ring on one side of the piston sleeve. Therefore, during the pressure testing process, the piston sleeve drives the O-ring to move, causing the pressure ring and the convex ring to squeeze the corresponding O-ring to deform it and fill the gap, thereby further enhancing the sealing effect, realizing dynamic compensation of the seal, and ensuring that the pressure testing chamber maintains good sealing performance under high-pressure environment, thereby ensuring the accuracy and reliability of the pressure testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a cross-sectional view of the present invention connected with an elbow pipe fitting; Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle; Figure 3 For the present invention Figure 1 Enlarged view of point B in the middle; Figure 4 It is a cross-sectional view of the variable angle link of the present invention.

[0022] In the figure: 1. Fixed sleeve; 11. Connecting ring; 12. Variable angle link; 13. First fixed ring; 14. Second fixed ring; 15. Positioning ring; 16. Positioning groove; 2. Elbow pipe fitting; 3. Fastening assembly; 31. Piston sleeve; 32. Gland flange; 33. Claw flange; 34. First ring groove; 35. Second ring groove; 36. Pressing ring; 37. Convex ring; 38. Limiting ring; 4. Pressure chamber; 5. Sealing assembly; 6. Pressure pipe. DETAILED DESCRIPTION

[0023] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0026] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0027] refer to Figure 1-4, a steel skeleton plastic composite electric fusion elbow pipe fitting pressing tool, comprising a fixed sleeve 1, two fastening components 3, a sealing component 5 and two pressing tubes 6, the fixed sleeve 1 is the basic supporting component of the entire tool, the fixed sleeve 1 is sleeved with an elbow pipe fitting 2, the central axes on both sides of the fixed sleeve 1 are coaxial with the central axes on both sides of the elbow pipe fitting 2, to ensure the uniformity of the gap between the fixed sleeve 1 and the elbow pipe fitting 2, thereby ensuring the accuracy of the pressure bearing capacity test results of the elbow pipe fitting 2, the two fastening components 3 are respectively arranged on both sides of the fixed sleeve 1, which can realize the fixed connection between the elbow pipe fitting 2 and the fixed sleeve 1, and a pressing cavity 4 is formed between the two fastening components 3 and the fixed sleeve 1 and the elbow pipe fitting 2, the sealing component 5 is connected to the fastening component 3 and the fixed sleeve 1, which can realize the sealing of the pressing cavity 4, and the two pressing tubes 6 are arranged on the inner wall of the fixed sleeve 1 and connected to the pressing cavity 4. The pressure tubes 6 can be made of high-strength, high-pressure-resistant metal pipes. One end of one pressure tube 6 is connected to an external pressure source, such as a pressure machine, and the other end extends into the pressure chamber 4. The number and position of the pressure tubes 6 are designed based on the actual pressure test requirements to ensure that the pressure medium can be evenly injected into the pressure chamber 4, allowing for a comprehensive and accurate pressure test of the elbow pipe 2. Another pressure tube 6 extends into the pressure chamber 4 at one end and can be equipped with a plug at the other end to seal the pressure chamber 4 during the pressure test, thereby achieving a complete and accurate pressure test of the elbow pipe 2.

[0028] In some embodiments, the fixed sleeve 1 includes a connecting ring 11, an angle-changing link 12, a first fixed ring 13, and a second fixed ring 14. The connecting ring 11 is sleeved with an elbow pipe fitting 2. The connecting ring 11 is coaxially arranged with one side of the elbow pipe fitting 2, which can provide preliminary installation positioning for the elbow pipe fitting 2. One side of the angle-changing link 12 is coaxially arranged with the connecting ring 11, and the other side is coaxially arranged with one side of the elbow pipe fitting 2. The angle of the angle-changing link 12 can be 11.25 degrees or 22.5 degrees, so that it can adapt to elbow pipe fittings 2 with different angles such as 11.25 degrees and 22.5 degrees. By replacing the angle-changing link 12, a set of tooling can be compatible with elbow pipe fittings of various angles. The connecting ring 11 and the variable angle link 12 can both be made of high-strength alloy steel, and the inner diameter and outer diameter of the connecting ring 11 and the variable angle link 12 are the same, ensuring that the gaps between the connecting ring 11, the variable angle link 12 and the inner wall of the elbow pipe fitting 2 are of the same size, thereby improving the uniformity of the force acting on the elbow pipe fitting 2 during the pressing process. A pressure tube 6 is provided on the inner wall of the connecting ring 11 and the variable angle link 12. The two pressure tubes 6 can be symmetrically arranged in the height direction. The pressure tube 6 on the variable angle link 12 can be an injection end, and a pressure medium such as water or gas can be injected into the pressure chamber 4 through the pressure tube 6 to achieve a pressure test on the elbow pipe 2. The pressure tube 6 on the connecting ring 11 can be an exhaust end, which can discharge the air in the pressure chamber 4 when the pressure medium is injected, and seal it during the pressure test. The first fixed ring 13 is coaxially arranged on the inner wall of the connecting ring 11 on the side close to the variable angle link 12, and the second fixed ring 14 is coaxially arranged on the inner wall of the variable angle link 12 on the side close to the connecting ring 11, and is detachably connected to the first fixed ring 13. The first fixed ring 13 and the second fixed ring 14 can be connected by bolts or other suitable detachable connection methods to firmly connect the connecting ring 11 and the variable angle link 12 together, thereby enhancing the overall structural strength of the fixed sleeve 1 and ensuring that the fixed sleeve 1 will not be deformed or loosened during the pressure test. At the same time, it is convenient to disassemble the connecting ring 11 and the variable angle link 12 after the test is completed, so as to realize the recycling use of the pressing tooling.

[0029] In some embodiments, the fixed sleeve 1 includes a positioning ring 15 and a positioning groove 16. The positioning ring 15 is coaxially arranged on the side of the connecting ring 11 near the variable angle link 12, and the positioning groove 16 is coaxially arranged on the side of the variable angle link 12 near the connecting ring 11. The positioning ring 15 and the positioning groove 16 can improve the installation accuracy and stability between the connecting ring 11 and the variable angle link 12, ensuring their coaxiality. A sealing assembly 5 is provided between the positioning ring 15 and the positioning groove 16 to prevent pressure medium leakage from the connection between the connecting ring 11 and the variable angle link 12, ensuring the accuracy and safety of the pressure test.

[0030] In some embodiments, the fastening assembly 3 includes a piston sleeve 31, a gland flange 32, and a claw flange 33. The piston sleeve 31 is coaxially arranged between the fixed sleeve 1 and the elbow pipe fitting 2, and can slide between the fixed sleeve 1 and the elbow pipe fitting 2. A sealing assembly 5 is provided between the piston sleeve 31 and the fixed sleeve 1 and the elbow pipe fitting 2. The piston sleeve 31 can be made of high-strength, high-toughness metal material with good wear resistance and sealing. Its shape is adapted to the outer shape of the fixed sleeve 1 and the elbow pipe fitting 2, and can fit tightly between the two, effectively preventing leakage of the pressure medium in the pressure chamber 4. The gland flange 32 is sleeved on the fixed sleeve 1 and can be interference fit, which facilitates positioning of the gland flange 32 during installation. , and is connected to the piston sleeve 31. The gland flange 32 can be connected to the piston sleeve 31 by bolts, so that the gland flange 32 can be fixed on the fixed sleeve 1, and the gland flange 32 is in contact with one side of the elbow pipe fitting 2. The elbow pipe fitting can be limited by the two gland flanges 32 to ensure that the elbow pipe fitting 2 does not undergo axial displacement during the pressing process. The claw flange 33 is coaxially sleeved on the elbow pipe fitting 2 and is connected to the gland flange 32. It can be fixed by bolts to achieve the fixation of the claw flange 33 on the elbow pipe fitting 2, thereby limiting the openings on both sides of the elbow pipe fitting 2, avoiding the outward expansion of the open side of the elbow pipe fitting 2 during the pressing process, avoiding the failure of the seal of the pressing chamber 4, thereby affecting the pressure test.

[0031] In some embodiments, the fastening assembly 3 further includes a first annular groove 34 and a second annular groove 35. The first annular groove 34 is provided on the side of the piston sleeve 31 near the gland flange 32, and a sealing assembly 5 is provided between the first annular groove 34 and the outer wall of the fixed sleeve 1. The second annular groove 35 is provided on the side of the piston sleeve 31 near the gland flange 32, and a sealing assembly 5 is provided between the first annular groove 34 and the inner wall of the elbow pipe fitting 2. The first annular groove 34 and the second annular groove 35 provide installation space for the sealing assembly 5, further enhancing the sealing performance between the piston sleeve 31 and the fixed sleeve 1 and the elbow pipe fitting 2, thereby ensuring the sealing of the pressure chamber 4.

[0032] In some embodiments, the fastening assembly 3 also includes a pressure ring 36, which is coaxially sleeved on the fixed sleeve 1, and the two side surfaces of the pressure ring 36 are respectively attached to the sealing assembly 5 in the second ring groove 35 and the pressure cover flange 32. The pressure ring 36 can press the sealing assembly 5, causing the sealing assembly 5 to be deformed under pressure, thereby squeezing the gap to ensure that the sealing assembly 5 always maintains a good sealing state during the pressurization process to prevent leakage of the pressure medium.

[0033] In some embodiments, the fastening assembly 3 further includes a raised ring 37, which is disposed on the side of the gland flange 32 close to the piston sleeve 31. The elbow pipe fitting 2 is coaxially sleeved on the raised ring 37, and the side of the raised ring 37 away from the gland flange 32 is in contact with the sealing assembly 5 in the first annular groove 34. The raised ring 37 can provide axial positioning for the elbow pipe fitting 2 and can squeeze the sealing assembly 5, causing it to deform and squeeze the gap, thereby enhancing the tightness of the connection between the gland flange 32 and the piston sleeve 31 and further improving the sealing effect.

[0034] Dynamic compensation of the pressing tooling can be achieved through the pressure ring 36 and the convex ring 37. During the pressing process, the pressing medium is continuously transported into the pressing chamber 4, which increases the internal pressure of the pressing chamber 4, thereby pressurizing the piston sleeve 31 and driving the two sealing components 5 to move toward the gland flange 32. The two sealing components 5 are squeezed by the pressure ring 36 and the convex ring 37 respectively, and deformed, further squeezing the gap between the piston sleeve 31 and the elbow pipe fitting 2 and the fixed sleeve 1, achieving elastic sealing compensation, thereby ensuring the sealing of the pressing chamber 4 during the pressing process.

[0035] In some embodiments, the inner wall of the claw flange 33 is provided with latching teeth, which engage with the external threads on the elbow pipe fitting 2. By engaging the latching teeth with the external threads on the elbow pipe fitting 2, the latching teeth can be fixed to the elbow pipe fitting 2, thereby fixing the position of the gland flange 32 on the fixed sleeve 1. At the same time, during the pressing process, as the internal pressure increases, the elbow pipe fitting 2 will expand outward, and the latching teeth will engage more tightly with the external threads of the elbow pipe fitting 2, thereby further enhancing the pressure-bearing stability of the tooling and effectively preventing the elbow pipe fitting 2 from falling out of the fixed sleeve 1.

[0036] In some embodiments, the fastening assembly 3 also includes a limiting ring 38, which is coaxially arranged on the fixed sleeve 1 and is arranged on the side of the piston sleeve 31 away from the pressure cover flange 32. The limiting ring 38 can limit the position of the piston sleeve 31 on the fixed sleeve 1, facilitating pre-positioning during installation, so as to improve the installation accuracy between the fixed sleeve 1 and the elbow pipe fitting 2.

[0037] In some embodiments, the sealing assembly 5 can be an O-ring, which has the advantages of simple structure, good sealing performance, and low cost. The O-ring is installed in the corresponding sealing groove between the fixed sleeve 1, the fastening assembly 3, and the elbow pipe 2, and achieves its sealing function through compression deformation. During the pressure application process, as the pressure increases, the O-ring is subjected to greater compression, further enhancing the sealing effect, ensuring the sealing of the pressure chamber 4, and preventing leakage of the pressure medium.

[0038] The specific working principle is as follows: During the specific test, according to the angle of the elbow pipe fitting 2 to be tested, a suitable variable angle link 12 is selected, the piston sleeve 31 is sleeved on the connecting ring 11, and contacted with the limit ring 38, and the sealing assembly 5 is set at the corresponding position of the piston sleeve 31. Then the pressure cover flange 32 is sleeved on the connecting ring 11 and connected to the piston sleeve 31 by bolts. Then, the whole part is inserted into one side of the elbow pipe fitting 2 to ensure that the connecting ring 11 is coaxial with the elbow pipe fitting 2. A claw flange 33 is sleeved on this side of the elbow pipe fitting 2 and connected to the pressure cover flange 32 by bolts to complete the fixed connection between the connecting ring 11 and the elbow pipe fitting 2.

[0039] The sealing assembly 5 is set in the positioning groove 16 of the variable angle link 12, and the positioning groove 16 is aligned with the positioning ring 15, inserted and fixed. The first fixing ring 13 and the second fixing ring 14 can be connected by bolts to ensure that the connecting ring 11 and the variable angle link 12 are coaxial and firmly connected, thereby achieving the coaxiality of the variable angle link 12 and the elbow pipe fitting 2. The piston sleeve 31 is then sleeved between the variable angle link 12 and the elbow pipe fitting 2, and contacts the limiting ring 38 on the variable angle link 12. The sealing assembly 5 is respectively installed in the first ring groove 34 and the second ring groove 35 of the piston sleeve 31. The gland flange 32 is sleeved on the variable angle link 12 and connected to the piston sleeve 31 by bolts. When tightening the bolts, follow the principle of uniform diagonal tightening to ensure that the gland flange 32 is evenly pressed against the piston sleeve 31, so that the sealing assembly 5 is fully compressed to achieve a good sealing effect. The claw flange 33 is put on the elbow pipe fitting 2 so that the teeth on the inner wall of the claw flange 33 engage with the external thread of the elbow pipe fitting 2, and then the claw flange 33 is connected to the gland flange 32 by bolts to further fix the elbow pipe fitting 2. In this way, the elbow pipe fitting 2 is fixedly connected to the pressing tool.

[0040] After installation, the press is connected to the press tube 6 of the variable angle link 12, and the press medium is delivered to the press chamber 4 through the press. The press medium will squeeze the air inside the press chamber 4, causing the air to be discharged from the press tube 6 on the connecting ring 11. When the air inside the press chamber 4 is completely discharged, the press tube 6 on the connecting ring 11 is blocked to achieve the sealing of the press chamber 4. The press continues to work, and the pressure in the press chamber 4 increases, which will push the piston sleeves 31 on both sides to press and drive the two sealing components 5 to move toward the gland flange 32. The two sealing components 5 are squeezed by the pressure ring 36 and the convex ring 37 respectively, causing them to deform, further squeezing the gap between the piston sleeve 31 and the elbow pipe fitting 2 and the fixed sleeve 1, achieving elastic sealing compensation, thereby ensuring the sealing of the press chamber 4 during the press process. In this way, the pressure test of the elbow pipe fitting 2 is achieved.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A steel skeleton plastic composite electric fusion elbow pipe fitting pressing tool, characterized by: It comprises a fixed sleeve (1), an elbow pipe fitting (2) is sleeved on the fixed sleeve (1), and the central axes on both sides of the fixed sleeve (1) are respectively coaxial with the central axes on both sides of the elbow pipe fitting (2); Two fastening assemblies (3), the two fastening assemblies (3) being respectively arranged on both sides of the fixed sleeve (1), capable of realizing a fixed connection between the elbow pipe fitting (2) and the fixed sleeve (1), and forming a pressing cavity (4) between the two fastening assemblies (3), the fixed sleeve (1) and the elbow pipe fitting (2); A sealing assembly (5), wherein the sealing assembly (5) is connected to the fastening assembly (3) and the fixed sleeve (1) to achieve sealing of the pressing chamber (4); Two pressure tubes (6), the two pressure tubes (6) are arranged on the inner wall of the fixed sleeve (1), and are both connected to the pressure chamber (4).

2. The steel skeleton plastic composite electric fusion elbow pipe fitting pressing tool according to claim 1, characterized in that: The fixed sleeve (1) comprises a connecting ring (11), the elbow pipe fitting (2) is sleeved on the connecting ring (11), and the connecting ring (11) is coaxially arranged with one side of the elbow pipe fitting (2); A variable angle chain (12), one side of the variable angle chain (12) is coaxially arranged with the connecting ring (11), and the other side is coaxially arranged with one side of the elbow pipe (2), and the inner walls of the connecting ring (11) and the variable angle chain (12) are both provided with the pressure pipe (6); a first fixing ring (13), the first fixing ring (13) being coaxially arranged on the inner wall of the connecting ring (11) on a side close to the variable angle connecting ring (12); A second fixing ring (14) is coaxially arranged on the inner wall of the variable angle connecting ring (12) on a side close to the connecting ring (11), and is detachably connected to the first fixing ring (13).

3. The steel skeleton plastic composite electric fusion elbow pipe fitting pressing tool according to claim 2, characterized in that: The fixed sleeve (1) comprises a positioning ring (15), and the positioning ring (15) is coaxially arranged on a side of the connecting ring (11) close to the variable angle connecting ring (12); A positioning groove (16) is coaxially arranged on a side of the variable angle link (12) close to the connecting ring (11) and is plug-fitted with the positioning ring (15), and the sealing assembly (5) is provided between the positioning ring (15) and the positioning groove (16).

4. The steel skeleton plastic composite electric fusion elbow pipe fitting pressing tool according to claim 1, characterized in that: The fastening assembly (3) comprises a piston sleeve (31), the piston sleeve (31) being coaxially arranged between the fixed sleeve (1) and the elbow pipe fitting (2), and the sealing assembly (5) being arranged between the piston sleeve (31) and the fixed sleeve (1) and the elbow pipe fitting (2); A gland flange (32), the gland flange (32) is sleeved on the fixed sleeve (1) and connected to the piston sleeve (31), and the gland flange (32) is in contact with one side of the elbow pipe (2); A claw flange (33) is coaxially sleeved on the elbow pipe (2) and connected to the gland flange (32).

5. The steel skeleton plastic composite electric fusion elbow pipe fitting pressing tool according to claim 4, characterized in that: The fastening assembly (3) further includes a first annular groove (34), the first annular groove (34) being provided on a side of the piston sleeve (31) close to the gland flange (32), and the sealing assembly (5) being provided between the first annular groove (34) and the outer wall of the fixed sleeve (1); A second annular groove (35) is provided on a side of the piston sleeve (31) close to the gland flange (32), and the sealing assembly (5) is provided between the first annular groove (34) and the inner wall of the elbow pipe (2).

6. The steel skeleton plastic composite electric fusion elbow pipe fitting pressing tool according to claim 5, characterized in that: The fastening assembly (3) further includes a pressure ring (36), which is coaxially sleeved on the fixed sleeve (1), and two side surfaces of the pressure ring (36) are respectively fitted on the sealing assembly (5) in the second annular groove (35) and the gland flange (32).

7. The steel skeleton plastic composite electric fusion elbow pipe fitting pressing tool according to claim 5, characterized in that: The fastening assembly (3) further comprises a convex ring (37), the convex ring (37) being arranged on a side of the gland flange (32) close to the piston sleeve (31), the elbow pipe fitting (2) being coaxially sleeved on the convex ring (37), and the convex ring (37) being in contact with the sealing assembly (5) in the first ring groove (34) on a side away from the gland flange (32).

8. The steel skeleton plastic composite electric fusion elbow pipe fitting pressing tool according to claim 4, characterized in that: The inner wall of the claw flange (33) is provided with a latching tooth, and the latching tooth engages with the external thread on the elbow pipe (2).

9. The steel skeleton plastic composite electric fusion elbow pipe fitting pressing tool according to claim 4, characterized in that: The fastening assembly (3) further comprises a limiting ring (38), wherein the limiting ring (38) is coaxially arranged on the fixed sleeve (1) and is arranged on a side of the piston sleeve (31) away from the gland flange (32).

10. The steel skeleton plastic composite electric fusion elbow pipe fitting pressing tool according to claim 1, characterized in that: The sealing component (5) is an O-ring.

Images