Hydrostatic composite pipe forming machine for joints

Abstract

The utility model discloses a water pressure composite pipe forming machine butt joint is used for inserting the inside of composite pipe to complete the processing forming of composite pipe, is equipped with fixed head and telescopic head, telescopic head inserts the inside of fixed head and can do telescopic motion in the inside of fixed head, the first end of telescopic head is exposed in fixed head and is equipped with insertion part and sealing part in exposed end, the composite pipe is also equipped with composite outer layer and composite inner layer, is equipped with taper surface on insertion part for making telescopic head insert composite inner layer, and sealing part is arranged in the rear end of insertion part for making telescopic head seal composite inner layer, the center of telescopic head is also equipped with water pressure channel, and high pressure water is injected to composite inner layer through water pressure channel and makes composite inner layer press tightly and fit composite outer layer. Through being equipped with fixed head and telescopic head, then inserting telescopic head into the inside of the innermost layer of composite pipe, the high pressure water is injected to its inside through telescopic head to realize the press bonding forming of multilayer pipe wall, and the technical scheme is simple in structure and convenient to operate.

Description

Technical Field

[0001] This invention relates to the field of composite pipe forming technology for multi-layer pipe walls, and specifically to the connector of a hydraulic composite pipe forming machine. Background Technology

[0002] With societal development and increasingly advanced science and technology, people's demands for quality of life are also rising. In certain specialized fields, the requirements for pipe fittings have reached new heights. For instance, in some situations, multi-layered composite pipes are needed to replace ordinary single-layered pipes. For example, in practical applications, pure copper pipes may be required, but pure copper is relatively soft and expensive. Therefore, thinner pure copper pipes are needed attached to a sturdy and relatively inexpensive steel pipe to achieve the same technical effect. However, pipe fittings are typically thin and long, making conventional composite material manufacturing methods unable to produce such thin and long composite pipe fittings. Even if they could, it would be difficult to guarantee that each layer of the pipe wall has a relatively uniform wall thickness and is firmly attached to each other along the entire length of the fitting. Therefore, to solve this technical problem, those skilled in the art need to develop a composite pipe hydraulic press capable of forming the entire pipeline under constant pressure. Using a hydraulic composite pipe forming machine for fitting joints has become essential. Summary of the Invention

[0003] This embodiment provides a hydraulic press composite pipe forming machine connector used in a composite pipe forming equipment that can process composite pipes with two or more layers into one piece. It is equipped with a fixed head and a telescopic head. The telescopic head is inserted into the innermost layer of the composite pipe, and high-pressure water is injected into it through the telescopic head to achieve multi-layer pipe wall compression forming. This technical solution has a simple structure and is easy to operate.

[0004] Specifically, on the one hand, the hydraulic composite pipe forming machine has a connector for inserting into the composite pipe to complete the processing and forming of the composite pipe. It is equipped with a fixed head g and a telescopic head s. The telescopic head s is inserted into the fixed head g and can move telescopically inside the fixed head g. The first end of the telescopic head s is exposed outside the fixed head g and has an insertion part c and a sealing part m at the exposed end. The composite pipe is also equipped with a composite outer layer fw and a composite inner layer fn. The insertion part c has a conical surface for inserting the telescopic head s into the composite inner layer fn. The sealing part m is located at the rear end of the insertion part c for sealing the composite inner layer fn with the telescopic head s. The telescopic head s is also equipped with a hydraulic channel t at its center. High-pressure water is injected into the composite inner layer fn through the hydraulic channel t to press the composite inner layer fn tightly against the composite outer layer fw.

[0005] According to one aspect of a specific embodiment of the present invention, the fixed head g is further provided with a water inlet pipe j, and the water pressure channel t passes through the telescopic head s and is aligned with the water inlet pipe j at its second end so that high-pressure water can enter the water pressure channel t from the water inlet pipe j.

[0006] According to one aspect of a specific embodiment of the present invention, a pre-pressurization system y is further provided. The pre-pressurization system y is further provided with a first pipeline y1, a one-way valve dy, an unloading valve xy, and a second pipeline y2 connected in series. The first pipeline y1 is disposed on the fixed head g and communicates with the inlet pipe j so that high-pressure water can enter the pre-pressurization system y through the inlet pipe j.

[0007] According to one aspect of a specific embodiment of the present invention, the telescopic head s is further provided with a cavity groove rc, and the second pipeline y2 is further provided with a second pipeline section y2a and a second pipeline section y2b. The second pipeline section y2a is disposed on the fixed head g and extends to the cavity groove rc, and the second pipeline section y2b is disposed on the telescopic head s and communicates with the cavity groove rc.

[0008] According to one aspect of a specific embodiment of the present invention, the sealing part m is annular and a pressure chamber my is provided between the inner diameter and the telescopic head s, and the second pipeline section y2b is interconnected with the pressure chamber my so that high-pressure water can enter the pressure chamber my.

[0009] According to one aspect of a specific embodiment of the present invention, the water inlet pipe j is further provided with a limiting surface xb, and the second end of the telescopic head s is further provided with a limiting shaft sx. After the limiting shaft sx and the limiting surface xb come into contact with each other, the telescopic head s can prevent it from being pulled out of the fixed head g.

[0010] According to one aspect of a specific embodiment of the present invention, the cavity groove rc is configured to be annular and its width is greater than the extension stroke of the telescopic head s, so that a section of the second pipeline y2a is always in communication with the cavity groove rc. Attached Figure Description

[0011] The features, advantages and technical effects of exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0012] Explanation of serial numbers: Composite outer layer fw, Composite inner layer fn, Fixed head g, Inlet pipe j, Limiting surface xb, Telescopic head s, Limiting shaft sx, Cavity groove rc, Insertion part c, Sealing part m, Pressure chamber my, Water pressure channel t, Pre-pressurization system y, First pipeline y1, Check valve dy, Unloading valve xy, Second pipeline y2, First section of second pipeline y2a, Second section of second pipeline y2b, Water system ss, Base jz, Sealing ring mm.

[0013] Figure 1 This is a schematic diagram of the basic structure of the overall layout of an embodiment of the present invention.

[0014] Figure 2 This is a cross-sectional schematic diagram of the cavity groove in an embodiment of the present invention.

[0015] Figure 3 This is a cross-sectional schematic diagram of the sealing part m according to an embodiment of the present invention.

[0016] Figure 4 This is a schematic diagram of the insertion of the composite inner layer fn in an embodiment of the present invention.

[0017] Figure 5 This is a schematic diagram of high-pressure water injection according to an embodiment of the present invention.

[0018] Figure 6 This is a schematic diagram of the insertion of the composite inner layer fn in the first embodiment of the present invention.

[0019] Figure 7 This is a schematic diagram of high-pressure water injection in the first embodiment of the present invention.

[0020] Figure 8 This is a schematic diagram of the insertion of the composite inner layer fn in the second embodiment of the present invention.

[0021] Figure 9 This is a schematic diagram of high-pressure water injection in the second embodiment of the present invention.

[0022] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Implementation

[0023] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present invention by way of example, but should not be used to limit the scope of the present invention. That is, the present invention is not limited to the described preferred embodiments, and the scope of the present invention is defined by the claims.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise stated, "perpendicular" and "parallel" are not only absolute in a mathematical sense, but can be understood as "approximately perpendicular" and "approximately parallel".

[0025] Figure 1 This is a schematic diagram of the basic structure of the overall layout of an embodiment of the present invention.

[0026] Figure 2 This is a cross-sectional schematic diagram of the cavity groove in an embodiment of the present invention.

[0027] Figure 3 This is a cross-sectional schematic diagram of the sealing part m according to an embodiment of the present invention.

[0028] like Figure 1 , Figure 2 and Figure 3As shown, this embodiment provides a hydraulic press composite pipe forming machine connector used in a composite pipe forming device capable of processing two or more layers of composite pipes into one piece. It features a fixed head and a telescopic head. The telescopic head is inserted into the innermost layer of the composite pipe, and high-pressure water is injected through the telescopic head to achieve multi-layer pipe wall compression forming. This technical solution has a simple structure and is easy to operate. Specifically, it requires a fixed head g and a telescopic head s. The fixed head g is a cylindrical structure with a cylindrical telescopic hole inside. The telescopic head s is a cylindrical shaft with a telescopic shaft surface on its outer circumference. The telescopic head s is inserted into the fixed head g through the telescopic shaft surface engaging with the shaft hole of the telescopic hole and can telescopically move within the fixed head g. At least two sealing rings mm are also provided on the outer circumferential telescopic shaft surface of the telescopic head s. Preferably, in this embodiment, two sealing rings are spaced apart from each other. The sealing rings mm directly contact the inner surface of the telescopic hole for sealing, achieving a sliding seal between the telescopic head s and the fixed head g through the action of the sealing rings mm.

[0029] The telescopic head s, being cylindrical, is exposed at its deepest point after being inserted into the fixed head g and abutting against the fixed head g. The exposed end has an insertion part c and a sealing part m. The insertion part c is a protrusion with a conical surface, and a circular groove is provided at the rear end of the conical surface. The sealing part m is disposed within the circular groove. The sealing part m is also circular, and the diameter of its inner ring is larger than the bottom diameter of the groove. This creates a pressure chamber my in an annular space between the sealing part m and the groove.

[0030] Among them, between the two sealing rings mm on the telescopic head s, there is also an annular cavity groove rc set along the outer cylindrical surface of the telescopic head s. The side wall of the fixed head g is also provided with a second pipeline section y2a. The second pipeline section y2a is set as a tubular hole and extends directly through the outer wall of the fixed head g to the cavity groove rc. The inside of the telescopic head s is also provided with a second pipeline section y2b. The second pipeline section y2b is also set as a tubular hole and extends through and connects the cavity groove rc and the pressure chamber my, so that the cavity groove rc and the pressure chamber my are interconnected.

[0031] The fixed head g is equipped with a circular tubular water inlet pipe j, which is located at the center of the cylindrical structure of the fixed head g and penetrates the fixed head g. A first pipe y1 is also provided on the side wall of the fixed head g. The first pipe y1 is also a tubular hole that extends directly through the outer wall of the fixed head g to the water inlet pipe j. A one-way valve dy and an unloading valve xy are also provided on the outer wall of the fixed head g. One end of the one-way valve dy is connected to the first pipe y1, and the other end is connected to the unloading valve xy. One end of the unloading valve xy is connected to the one-way valve dy, and the other end is connected to a first section of the second pipe y2a. The first section of the second pipe y2a and the second section of the second pipe y2b are combined to form the second pipe y2. The first pipe y1, the one-way valve dy, the unloading valve xy, and the second pipe y2 are combined to form the pre-pressurization system y.

[0032] The lower end of the fixed head g is provided with a base jz for fixing the fixed head g, and its end is also provided with a water system ss that is sealed to it. The water system ss is provided with water pipes, which are directly connected to the inlet pipe j. The water system ss can provide high-pressure water to enter the inlet pipe j and enter the one-way valve dy and the unloading valve xy through the first pipe y1. Then, it enters the pressure chamber my through the first section of the second pipe y2a, the cavity groove rc, and the second section of the second pipe y2b. The pressure chamber my can expand under the pressure of the high-pressure water, causing the sealing part m to expand outward.

[0033] The telescopic head s, being cylindrical, also has a water pressure channel t at its central part. The water pressure channel t passes through the telescopic head s and is aligned with the inlet pipe j at its second end, allowing high-pressure water to enter the water pressure channel t from the inlet pipe j. The inlet pipe j also has a limiting surface xb, and the second end of the telescopic head s has an outwardly extending limiting shaft sx. The limiting shaft sx is coaxial with the limiting surface xb. When the telescopic head s moves along the cylindrical telescopic hole to its limit position towards the outside of the fixed head g, the limiting shaft sx abuts against the limiting surface xb, stopping the telescopic head s from moving and preventing the telescopic head s from being pulled out of the fixed head g.

[0034] According to one aspect of a specific embodiment of the present invention, the cavity groove rc is configured to be annular and its width is greater than the extension stroke of the telescopic head s, so that a section of the second pipeline y2a is always in communication with the cavity groove rc.

[0035] Figure 4 This is a schematic diagram of the insertion of the composite inner layer fn in an embodiment of the present invention.

[0036] Figure 5 This is a schematic diagram of high-pressure water injection according to an embodiment of the present invention.

[0037] like Figure 4 andFigure 5 As shown, the composite pipe also comprises a separate outer composite layer fw and an inner composite layer fn. The telescopic head s can be inserted into the inner composite layer fn until the inner composite layer fn covers the sealing part m. The sealing part m allows the telescopic head s to seal the inner composite layer fn. High-pressure water is injected into the inner composite layer fn through the water pressure channel t, causing the inner composite layer fn to press tightly against the outer composite layer fw, thus forming a single composite pipe.

[0038] Figure 6 This is a schematic diagram of the insertion of the composite inner layer fn in the first embodiment of the present invention.

[0039] Figure 7 This is a schematic diagram of high-pressure water injection in the first embodiment of the present invention.

[0040] like Figure 6 and Figure 7 As shown, according to one aspect of a specific embodiment of the first invention, the composite pipe can be a barrel-shaped structure closed at one end. In operation, firstly, a set of connectors described in this technical solution is placed at the opening of the composite pipe to be processed in the barrel-shaped structure. Then, the fixed head g is pushed to drive the telescopic head s towards the opening of the composite pipe, causing the telescopic head s to insert into the inner composite layer fn until the inner composite layer fn covers the sealing part m. Then, high-pressure water is injected into the inner composite layer fn through the water system ss. The high-pressure water enters the first pipeline y1 through the inlet pipe j, and enters the pressure chamber my through the one-way valve dy and the unloading valve xy of the pre-pressurization system y. The high-pressure water causes the sealing part m to expand outward, further compressing the inner composite layer fn and maintaining pressure, so that the telescopic head s completely seals the opening of the composite pipe to be processed. Simultaneously, high-pressure water enters the inner composite layer fn through the water pressure channel t, causing the inner composite layer fn to expand under the action of the high-pressure water and press outward onto the outer composite layer fw, forming a single composite pipe. After pressure holding and molding, the water system SS is depressurized, allowing high-pressure water to flow out of the composite pipe through the water pressure channel t. Then, the unloading valve XY is opened, allowing the pre-pressure system y to depressurize. The sealing part m retracts inward, and then the composite pipe is pulled outward to disengage from the telescopic head s, thus ending the processing.

[0041] Figure 8 This is a schematic diagram of the insertion of the composite inner layer fn in the second embodiment of the present invention.

[0042] Figure 9 This is a schematic diagram of high-pressure water injection in the second embodiment of the present invention.

[0043] like Figure 8 and Figure 9As shown, according to one aspect of a specific implementation of the second embodiment of the present invention, the composite pipe can be a hollow pipe structure with open ends. In specific operation, firstly, two sets of connectors described in this technical solution are placed at the open ends of the composite pipe to be processed in the hollow pipe structure. Then, the fixed heads g at both ends are pushed to drive the telescopic heads s towards the open ends of the composite pipe, causing the telescopic heads s to be inserted into the inner composite layers fn at both ends until the inner composite layers fn cover the sealing part m. Then, high-pressure water is injected into the inner composite layers fn through the water system ss. The high-pressure water enters the first pipeline y1 through the inlet pipe j, and enters the pressure chamber my through the one-way valve dy and unloading valve xy of the pre-pressurization system y. The high-pressure water causes the sealing part m to expand outward, further compressing the inner composite layers fn and maintaining pressure, so that the telescopic heads s completely seal the openings of the composite pipe to be processed. Simultaneously, high-pressure water enters the inner composite layers fn through the water pressure channel t, causing the inner composite layers fn to expand under the action of the high-pressure water and press outward onto the outer composite layers fw, forming a single composite pipe. After pressure holding and molding, the water system SS is depressurized, allowing high-pressure water to flow out of the composite pipe through the water pressure channel t. Then, the unloading valve xy is opened, allowing the pre-pressure system y to depressurize. The sealing part m retracts inward, and then the butt joints described in this technical solution are pulled to both sides to disengage them from the composite pipe, thus ending the processing.

[0044] It should be understood that the description of specific embodiments of the present invention in the specification is exemplary and should not be construed as an undue limitation on the scope of protection of the present invention. The scope of protection of the present invention is defined by its claims and covers all embodiments falling within its scope and their obvious equivalents.

Claims

1. A connector for a hydraulic composite pipe forming machine, used to insert into the interior of a composite pipe to complete the processing and forming of the composite pipe, characterized in that... The composite pipe is provided with a fixed head (g) and a telescopic head (s). The telescopic head (s) is inserted into the fixed head (g) and can telescopically move inside the fixed head (g). The first end of the telescopic head (s) is exposed outside the fixed head (g) and has an insertion part (c) and a sealing part (m) at the exposed end. The composite pipe also has a composite outer layer (fw) and a composite inner layer (fn). The insertion part (c) has a conical surface for inserting the telescopic head (s) into the composite inner layer (fn). The sealing part (m) is located at the rear end of the insertion part (c) for sealing the composite inner layer (fn) with the telescopic head (s). The telescopic head (s) also has a water pressure channel (t) at its center. High-pressure water is injected into the composite inner layer (fn) through the water pressure channel (t) to press the composite inner layer (fn) tightly against the composite outer layer (fw). The fixed head (g) also has a water inlet pipe (j) inside, and the water pressure channel (t) passes through the telescopic head. The head (s) is aligned with the inlet pipe (j) at its second end so that high-pressure water can enter the water pressure channel (t) from the inlet pipe (j). It is also equipped with a pre-pressurization system (y). The pre-pressurization system (y) is also equipped with a first pipeline (y1), a one-way valve (dy), an unloading valve (xy), and a second pipeline (y2) connected in series. The first pipeline (y1) is set on the fixed head (g) and is connected to the inlet pipe (j) so that high-pressure water can enter the pre-pressurization system (y) through the inlet pipe (j). The telescopic head (s) is also equipped with a cavity groove (rc). The second pipeline (y2) is also equipped with a second pipeline section (y2a) and a second pipeline section (y2b). The second pipeline section (y2a) is set on the fixed head (g) and extends to the cavity groove (rc). The second pipeline section (y2b) is set on the telescopic head (s) and is connected to the cavity groove (rc).

2. The connector of the hydraulic composite pipe forming machine according to claim 1, characterized in that... The sealing part (m) is annular and a pressure chamber (my) is provided between the inner diameter and the telescopic head (s). The second pipeline section (y2b) is interconnected with the pressure chamber (my) so that high-pressure water can enter the pressure chamber (my).

3. The connector of the hydraulic composite pipe forming machine according to claim 2, characterized in that... The water inlet pipe (j) is also provided with a limiting surface (xb), and the second end of the telescopic head (s) is also provided with a limiting shaft (sx). After the limiting shaft (sx) and the limiting surface (xb) come into contact with each other, the telescopic head (s) can be prevented from being pulled out of the fixed head (g).

4. The butt joint of the hydraulic composite pipe forming machine according to claim 3, characterized in that... The cavity groove (rc) is set in a ring shape and its width is greater than the extension stroke of the telescopic head (s) so that the second pipeline section (y2a) is always in communication with the cavity groove (rc).

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