Stainless steel pipe based on water swelling forming process

Abstract

The utility model discloses a stainless steel pipe based on a water swelling forming process, which comprises a main pipe fitting, one end of the main pipe fitting is sleeved with an adaptive joint, one side of an inner cavity of the adaptive joint is provided with a slot, and the inner wall of the slot is fixedly connected with uniformly distributed clamping strips I; first clamping grooves distributed at equal intervals are formed in the two ends of the surface of the main pipe fitting, four check blocks are fixedly connected to inner cavities of the first clamping grooves, sealing ring grooves are formed in the two ends of the surface of the main pipe fitting, and sealing rings are connected to inner cavities of the sealing ring grooves in a sleeved mode. The steel pipes are efficiently assembled and mounted in a plug-in mode, welding or bolts are not needed, and working hours are saved by more than 50%; and additional parts such as flanges are omitted, the overall weight reduction is remarkable, the reliability is high, double guarantees of mechanical interlocking and the sealing ring are achieved, and the device is suitable for working environments with high requirements such as vibration.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel pipe water expansion forming technology, and in particular to a stainless steel pipe based on water expansion forming process. Background Technology

[0002] Traditional stainless steel pipe connections mostly use welding, flanges, or threaded joints, which have the following problems:

[0003] Welding defects: In the working environment, the overheated area will affect the steel pipe, which is prone to cracking and reduces fatigue strength; Heavy weight: The connection of the pipe will be equipped with flanges and other accessories, which will increase the overall weight of the pipe; Complex assembly: The installation of the pipe requires special tools or multiple calibrations, and its sealing and torsional performance are still insufficient.

[0004] To address the aforementioned problems, this utility model provides improvements. Summary of the Invention

[0005] This invention proposes a stainless steel pipe based on a water-expansion forming process, which solves the above-mentioned problems existing in the use of the prior art.

[0006] The technical solution of this utility model is implemented as follows: a stainless steel pipe based on water expansion forming process includes a main pipe, one end of which is sleeved with an adapter, a slot is provided on one side of the inner cavity of the adapter, and a uniformly distributed locking strip is fixedly connected to the inner wall of the slot. Both ends of the main pipe surface are provided with equally spaced locking grooves, and four stops are fixedly connected to the inner cavity of the locking grooves. Both ends of the main pipe surface are provided with sealing ring grooves, and a sealing ring is sleeved in the inner cavity of the sealing ring groove.

[0007] The present invention, as described above, is used for stainless steel pipes based on water expansion forming process. Further, both ends of the surface of the main pipe are fixedly connected with multiple second-type retaining strips, the lengths of the multiple second-type retaining strips are all different, and the multiple second-type retaining strips are adapted to the notches formed between two adjacent first-type retaining strips.

[0008] The present invention, as described above, is used for stainless steel pipes based on a water-expanding forming process. Further, an internally fixed pipe assembly is installed inside the main pipe component, and the end of the internal pipe assembly passes through the inner cavity of the slot and is inserted into the inner cavity of the adapter.

[0009] The present invention, as described above, is used for stainless steel pipes based on water-expansion forming process. Further, the built-in pipe assembly includes a built-in pipe fitting one, and a built-in pipe fitting two is sleeved on the outside of the built-in pipe fitting one. The built-in pipe fitting two is inserted into the inner cavity of the main pipe fitting.

[0010] The present invention, as described above, is used for stainless steel pipes based on water expansion forming process. Further, the surface of the built-in pipe fitting one is fixedly connected with multiple clips three, and the inner wall of the built-in pipe fitting two is provided with multiple slots two that are adapted to the clips three.

[0011] The present invention, as described above, is used for stainless steel pipes based on water expansion forming process. Further, both ends of the built-in pipe fitting are detachably installed with fixed end caps, the inner wall of the fixed end cap is provided with internal threads, and both ends of the surface of the built-in pipe fitting are provided with external threads that are compatible with the internal threads.

[0012] The present invention, as described above, is used for stainless steel pipes based on a water-expansion forming process. Further, the second built-in pipe is fixed to the first built-in pipe by two fixed end caps, and both the first built-in pipe and the second built-in pipe are fixed to the main pipe by two fixed end caps.

[0013] In summary, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model adopts a structural design that can interlock with the joint, enabling the steel pipe to be assembled efficiently and installed by plugging, without the need for welding or bolts, saving more than 50% of labor time; it is lightweight, eliminating the need for additional parts such as flanges, resulting in significant overall weight reduction, high reliability, and double protection with mechanical interlock and sealing ring, making it suitable for high-requirement working environments such as vibration.

[0015] 2. This utility model features a set of two locking strips, each with a different length. There is only one longest locking strip in each group, with other lengths in separate groups. Users can modify the specific distribution design according to their actual needs. During installation, the locking strips in the same group will fit into the notch formed between two adjacent locking strips, thus providing positioning and fixing for the main component when it is installed into the adapter. This ensures that the locking strips can accurately fit into the corresponding slots, facilitating installation for the user. The stop block and the locking strips abut against each other, limiting the locking of the locking strips within the slots.

[0016] 3. This utility model features two built-in pipe fittings: the first built-in pipe fitting serves as the inner layer, which is treated with anti-corrosion measures to protect the pipe from corrosion during liquid transport and extend its service life. The second built-in pipe fitting serves as the middle layer, providing support and reinforcement to ensure the overall strength of the pipe. The main pipe fitting serves as the outer layer, protecting the entire pipe and reducing physical damage from foreign objects and sharp objects, thus extending its service life.

[0017] 4. With the setting of the three clips and the two slots, when the built-in pipe is inserted into the built-in pipe, the three clips will also be inserted into the corresponding slot, thereby positioning the built-in pipe and preventing the built-in pipe from rotating inside the built-in pipe, thus providing convenience for the user's work.

[0018] 5. This utility model, through the setting of fixed end caps, internal threads and external threads, the internal threads and external threads are locked together, which can play a role in preventing mechanical loosening. After the second built-in tube is put on the first built-in tube, the fixed end cap can be installed on the first built-in tube to fix the second built-in tube. Similarly, after the second built-in tube and the first built-in tube are inserted into the main tube, the two fixed end caps abut against the two ends of the main tube, thereby fixing the entire built-in tube assembly on the main tube. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is an exploded three-dimensional structural diagram of the present invention;

[0022] Figure 3 This is a partial three-dimensional exploded view of the present invention;

[0023] Figure 4 This is an exploded view of the three-dimensional structure of the built-in tube assembly.

[0024] In the diagram: 1. Main pipe fitting, 2. Adapter connector, 3. Slot, 4. Clip 1, 5. Slot 1, 6. Stop block, 7. Sealing ring groove, 8. Sealing ring, 9. Clip 2, 10. Internal pipe assembly, 101. Internal pipe fitting 1, 102. Internal pipe fitting 2, 103. Clip 3, 104. Slot 2, 105. Fixed end cap, 106. Internal thread, 107. External thread. Detailed Implementation

[0025] The following will refer to the appendix in the embodiments of this utility model. Figure 1-4The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Example

[0026] A stainless steel pipe based on a water-expanding forming process includes a main pipe 1, one end of which is fitted with an adapter 2. A slot 3 is provided on one side of the inner cavity of the adapter 2. Evenly distributed retaining strips 4 are fixedly connected to the inner wall of the slot 3. Both ends of the main pipe 1 are provided with equally spaced retaining grooves 5. Four stops 6 are fixedly connected to the inner cavity of the retaining grooves 5. Both ends of the surface of the main pipe 1 are provided with sealing ring grooves 7. A sealing ring 8 is fitted into the inner cavity of the sealing ring groove 7.

[0027] The specific usage process is as follows: First, the adapter 2 is a matching connector, and it can be installed on both ends of the main pipe component 1. Therefore, the installation flexibility of the main pipe component 1 is higher, and the overall weight is significantly reduced by eliminating components such as flanges. Furthermore, no welding or bolt fastening is required, greatly saving labor time and improving assembly efficiency. It can adapt to high-requirement working environments. During installation, the adapter 2 is fitted onto the end of the main pipe component 1 and pressed down until the end of the main pipe component 1 is inserted into the slot 3 until the end of the main pipe component 1 abuts against the step at the connection between the inner cavity of the adapter 2 and the inner cavity of the slot 3. At the same time, the end of the built-in pipe assembly 10 will also be inserted into the adapter 2. It should be noted that, due to... The end of the built-in tube assembly 10 is beveled, allowing for easier and more flexible insertion into the adapter 2 during installation. Once the adapter 2 is fully fitted onto the end of the main pipe component 1, the retaining strip 4 in the slot 3 will engage with the corresponding retaining groove 5, and each stop 6 will abut against the corresponding retaining strip 4. Before this, a sealing ring 8 must be inserted into the sealing ring groove 7. Then, the main pipe component 1 with the adapter 2 installed can be placed into the mold. It should be noted that the mold selection is relatively flexible; a mold that exposes the adapter 2 or one that completely encloses the main pipe component 1 and the adapter 2 can be used, depending on the actual processing requirements. This step is called billet loading. Then, liquid is filled into the mold, followed by pre-filling and venting to remove excess air from the mold and pipes after water injection. Next, the mold and pipes are pressurized in stages. Once the pressure reaches a certain value, pressure holding and shaping are performed. The staged pressurization includes: pre-expansion pressure of 10-30 MPa (control accuracy ±0.5 MPa), main forming pressure of 80-400 MPa (control accuracy ±0.2 MPa), and calibration pressure of 120-150 MPa (control accuracy real-time PID adjustment). After the pressure holding time, pressure is released and the mold is demolded. The pressure holding time is input according to the equipment's set value. This is existing technology and will not be elaborated further in this article. Under the influence of pressure and liquid expansion, the inner wall of slot 5 expands outward, tightly locking itself against the surface of clip 4. This also causes the outer wall of the main pipe fitting 1 to fit tightly against the inner wall of slot 3, which is the inner wall of adapter 2. Thus, adapter 2 can fit tightly against the main pipe fitting 1. This mechanical interlocking and sealing ring installation method ensures the sealing performance of the steel pipe. Furthermore, the absence of a flange reduces the weight of the fittings, and the elimination of welding or bolts saves over 50% of labor time, resulting in high installation efficiency. It should be noted that after liquid filling and pressurization, the internal fitting 101 also expands, causing clip 3 103 to firmly engage within slot 2 104. Simultaneously, it expands and opens internal fitting 2 102, further expanding and opening the main pipe fitting 1. In other words...When the main pipe 1 is pressurized and expanded, the inner fittings 101 and 102 will also expand and deform. It should be noted that inner fitting 101 is installed inside inner fitting 102, which is fixed to the main pipe 1 by two fixed end caps 105. Similarly, inner fitting 101 is also fixed inside inner fitting 102 by two fixed end caps 105. This facilitates the user's installation of the inner pipe assembly 10 into the main pipe 1. Inner fitting 101 is used as an inner layer fitting, which is corrosion-resistant and provides protection against corrosion during liquid transport, extending the fitting's service life. Inner fitting 102 is used as a middle layer fitting, used for... Each pipe fitting serves a supporting and reinforcing function, ensuring the overall strength of the pipe. The main pipe fitting 1 acts as the outer layer, protecting the entire pipe and reducing physical damage from foreign objects and sharp objects, thus extending its service life. Each retaining strip 29 has a different length, with only one longest retaining strip 29 in each group, and 2-6 retaining strips of other lengths. The specific distribution design can be modified by the user according to actual needs. During installation, the retaining strips 29 in the same group will fit into the notch formed between two adjacent retaining strips 1-4, thus positioning and fixing the main pipe fitting 1 into the adapter 2, ensuring that the retaining strips 1-4 can accurately fit into the corresponding retaining slots 1-5, facilitating installation for the user. The design provides convenience. The stop block 6 and the locking strip 4 abut against each other, limiting the locking strip 4 within the locking groove 5. The built-in fitting 101 serves as the inner layer fitting, undergoing anti-corrosion treatment to protect the fitting during liquid transport and extend its service life. The built-in fitting 102 serves as the middle layer fitting, providing support and reinforcement to ensure overall strength. The main fitting 1 serves as the outer layer fitting, protecting the fitting from external foreign objects and sharp objects, thus extending its service life. Built-in fitting 101 is inserted into built-in fitting 102. Simultaneously, the locking strip 3 103 also engages with the corresponding locking groove 2 104, thereby positioning the internal tube 1 101 and preventing it from rotating within the internal tube 2 102, providing convenience for the user. The internal thread 106 and external thread 107 are interlocked, providing mechanical anti-loosening. After the internal tube 2 102 is fitted onto the internal tube 1 101, the fixing end cap 105 is installed on the internal tube 1 101 to fix the internal tube 2 102 in place. Similarly, after the internal tube 2 102 and the internal tube 1 101 are inserted into the main tube 1, the two fixing end caps 105 abut against both ends of the main tube 1, thereby fixing the entire internal tube assembly 10 onto the main tube 1.

[0028] Therefore, the structural design that can interlock with the joint enables the steel pipe to be assembled efficiently, with plug-in installation, eliminating the need for welding or bolts, saving more than 50% of labor time; it is lightweight, eliminating the need for flanges and other additional parts, resulting in significant overall weight reduction, high reliability, and double protection with mechanical interlock and sealing rings, making it suitable for high-requirement working environments such as those with vibration.

[0029] Multiple locking strips 9 are fixedly connected to both ends of the surface of the main component 1. The lengths of the multiple locking strips 9 are different, and the multiple locking strips 9 are adapted to the notches formed between two adjacent locking strips 4.

[0030] Specifically, the length of each of the two clips 9 is different. There is only one clip 9 of the longest length in each group, while there are 2-6 clips of other lengths. Users can modify the specific distribution design according to their actual needs. During installation, the clips 9 in the same group will fit into the gap formed between two adjacent clips 4, thus playing a role in positioning and fixing the main component 1 into the adapter 2. This ensures that the clips 4 can be accurately inserted into the corresponding slots 5, providing convenience for the user's installation work. The stop block 6 is in contact with the clips 4, which can limit the clips 4 that are stuck in the slots 5.

[0031] The main tube component 1 is fixedly installed inside the internal cavity of the main tube component 1. The end of the internal tube component 10 passes through the inner cavity of the slot 3 and is inserted into the inner cavity of the adapter 2. The internal tube component 10 includes an internal tube component 101. An internal tube component 2 102 is sleeved on the outside of the internal tube component 101. The internal tube component 2 102 is inserted into the inner cavity of the main tube component 1.

[0032] Specifically, the internal fitting 101 and internal fitting 102 are configured as follows: Internal fitting 101 is used as an inner layer fitting, which is treated with anti-corrosion to prevent corrosion during liquid transportation and extend the service life of the fitting. Internal fitting 102 is used as a middle layer fitting to support and reinforce the entire fitting, ensuring its overall strength. The main fitting 1 is used as an outer layer fitting to protect the entire fitting, reducing physical damage to the fitting from foreign objects and sharp objects, and extending the service life of the fitting.

[0033] The surface of the built-in tube 101 is fixedly connected with multiple clips 3 103, and the inner wall of the built-in tube 2 102 is provided with multiple slots 2 104 that are adapted to the clips 3 103.

[0034] Specifically, with the setting of the locking strip 3 103 and the locking slot 2 104, when the built-in pipe fitting 1 101 is inserted into the built-in pipe fitting 2 102, the locking strip 3 103 will also be locked into the corresponding locking slot 2 104, thereby positioning the built-in pipe fitting 1 101 and preventing it from rotating inside the built-in pipe fitting 2 102, thus providing convenience for the user's work.

[0035] Both ends of the first built-in tube 101 are detachably fitted with fixed end caps 105. The inner wall of the fixed end cap 105 is provided with an internal thread 106. Both ends of the surface of the first built-in tube 101 are provided with external threads 107 that are adapted to the internal thread 106. The second built-in tube 102 is fixed to the first built-in tube 101 by the two fixed end caps 105. Both the first built-in tube 101 and the second built-in tube 102 are fixed to the main tube 1 by the two fixed end caps 105.

[0036] Specifically, the fixed end cap 105, internal thread 106, and external thread 107 are designed so that the internal thread 106 and external thread 107 are locked together, which can play a role in preventing mechanical loosening. After the second internal tube 102 is fitted onto the first internal tube 101, the fixed end cap 105 is installed on the first internal tube 101 to fix the second internal tube 102. Similarly, after the second internal tube 102 and the first internal tube 101 are inserted into the main tube 1, the two fixed end caps 105 abut against the two ends of the main tube 1, thereby fixing the entire internal tube assembly 10 onto the main tube 1.

[0037] It should be noted that the functions to be achieved by each hardware component in this utility model are supported by a large number of mature technologies and belong to the prior art. The essence of this utility model is to optimize and combine existing hardware and its connection methods for specific application scenarios to meet the adaptation requirements of specific application scenarios and solve the problems raised in the background technology (without involving improvements to the internal software of the hardware).

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stainless steel pipe based on a water-expansion forming process, comprising a main pipe (1), characterized in that: One end of the main component (1) is fitted with an adapter (2). A slot (3) is provided on one side of the inner cavity of the adapter (2). A uniformly distributed locking strip (4) is fixedly connected to the inner wall of the slot (3). Both ends of the main component (1) are provided with equally spaced locking grooves (5). Four stops (6) are fixedly connected to the inner cavity of the locking groove (5). Both ends of the surface of the main component (1) are provided with sealing ring grooves (7). A sealing ring (8) is fitted into the inner cavity of the sealing ring groove (7).

2. The stainless steel pipe based on the water-expansion forming process according to claim 1, characterized in that: Multiple second-order clips (9) are fixedly connected to both ends of the surface of the main component (1). The lengths of the multiple second-order clips (9) are different, and the multiple second-order clips (9) are adapted to the gaps formed between two adjacent first-order clips (4).

3. A stainless steel pipe based on a water-expansion forming process according to claim 2, characterized in that: The main component (1) has an internally fixedly installed built-in tube assembly (10), the end of which passes through the inner cavity of the slot (3) and is inserted into the inner cavity of the adapter (2).

4. A stainless steel pipe based on a water-expansion forming process according to claim 3, characterized in that: The built-in tube assembly (10) includes a built-in tube first (101), and a built-in tube second (102) is sleeved on the outside of the built-in tube first (101). The built-in tube second (102) is inserted into the inner cavity of the main tube (1).

5. A stainless steel pipe based on a water-expansion forming process according to claim 4, characterized in that: The surface of the built-in tube (101) is fixedly connected with a plurality of clips (103), and the inner wall of the built-in tube (102) is provided with a plurality of slots (104) that are adapted to the clips (103).

6. A stainless steel pipe based on a water-expanding forming process according to claim 5, characterized in that: Both ends of the built-in tube (101) are detached and installed with fixed end caps (105). The inner wall of the fixed end cap (105) is provided with internal threads (106). Both ends of the surface of the built-in tube (101) are provided with external threads (107) that are compatible with the internal threads (106).

7. A stainless steel pipe based on a water-expanding forming process according to claim 6, characterized in that: The second built-in pipe (102) is fixed to the first built-in pipe (101) by two fixed end caps (105). Both the first built-in pipe (101) and the second built-in pipe (102) are fixed to the main pipe (1) by two fixed end caps (105).

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