TWI630341B - Composite pressure vessel and manufacturing method thereof - Google Patents

Abstract

The composite pressure vessel of the present invention seals a valve seat at a filling hole of a polymer inner liner, and a composite material outer casing is externally coated with a composite material casing; wherein the valve seat is attached to a metal body The edge is coated with a polymer bushing, and the polymer preform is processed into a polymer liner directly bonded to the polymer bushing by a blow molding method, so that the bonding effect between the polymer liner and the valve seat is more accurate. It is comprehensive, and the upper and lower lip of the polymer liner can be simultaneously clamped on the upper and lower edges of the bead of the polymer bushing to greatly increase the strength of the mechanical structure that withstands the pressure of the contents of the polymer liner; A relatively stable and reliable composite pressure vessel.

Description

Composite pressure vessel and manufacturing method thereof

The present invention relates to a composite pressure vessel and is intended to provide a composite pressure vessel having a relatively more stable and reliable structure, and a composite pressure vessel manufacturing method therefor.

Because the gas cylinders used in traditional barrel gas are quite heavy, they are mostly sold, transported and filled by gas. However, due to the ageing of the domestic labor force, the work is willing to do less and less, plus Metal cylinders have the problem of high temperature gas explosion, rust and gas leakage and the inconsistency of contents, and the invention of composite pressure vessels (hereinafter collectively referred to as composite pressure vessels).

In addition, in order to facilitate the replacement of the commercially available liquefied gas or barrel gas container, a switch valve will be installed. The traditional gas cylinder is not suitable for the assembly of the switch valve because it is advantageous for directly processing the tooth shape with the metal. The problem is that the composite pressure vessel is directly processed by the dental pressure type, so as shown in Fig. 1, a polymer bushing 12 is coated on the periphery of the metal valve seat 11 which is pre-finished, and the polymer lining is passed through the polymer lining. The sleeve 12 seals the metal valve seat 11 to a filling hole of the polymer liner 13, and finally covers a composite material casing 14 around the periphery of the polymer liner 13.

Similar to the conventional composite pressure vessel, the polymer inner liner 13 and the polymer bushing 12 are processed by injection molding, and then the polymer inner liner 13 and the polymer are rubbed and welded by friction. The material of the bushing 12 is combined to achieve the purpose of sealing the metal valve seat 11 to the filling hole of the polymer liner 13 through the polymer bushing 12.

However, limited to the direction of the force applied during the frictional spin welding, the polymer inner liner 13 and the polymer bushing 12 are limited to a contact surface which is not parallel to the direction of the force application and which opposes the direction of the force application. The bonding function is not only limited in the strength of the mechanical structure capable of withstanding the pressure of the contents of the polymer liner 13, but also often caused by the processing of the polymer liner 13 or the polymer liner 12 itself, resulting in the polymer liner 13 and The joint of the polymer bushing 12 cannot achieve the desired airtight effect.

In view of the above, the present invention provides a composite pressure vessel having a relatively stable and reliable structure, and a composite pressure vessel manufacturing method therefor, which is the main object.

The composite pressure vessel of the present invention comprises: a valve seat, a polymer liner, and a composite material casing; wherein: the valve seat has a metal body, and the outer edge of the metal body is covered with a high a molecular bushing having a through-fluid passageway at one end of the fluid passageway, wherein the polymer bushing is provided with a convex ring at a middle portion of the outer edge thereof, the polymer lining The outer edge of the sleeve is provided with a shoulder at a position above the bead, and the outer edge of the polymer bushing forms a first necking section between the bead and the shoulder, and the polymer lining Forming a second necking section relative to a position below the bead; the polymer liner is joined to the polymer bushing of the valve seat by means of air blowing, and has a chamber for containing a fluid And a filling hole communicating with the chamber, the inner edge of the filling hole is closely adhered to the polymer bushing of the valve seat, and the inner edge of the filling hole is formed on a convex ring opposite to the valve seat The upper lip at the edge and a lower edge of the bead located opposite the valve seat a convex lip; the composite material shell is oppositely coated on the outside of the polymer inner liner, has a convex ring and a shoulder extending relatively into the valve seat and simultaneously with the convex lip of the polymer inner liner and the A crimping portion of the shoulder of the valve seat.

The composite pressure vessel of the invention not only can produce a more reliable and comprehensive joint effect of the polymer liner and the polymer bushing of the valve seat, but also can be simultaneously clamped by the upper and lower lip of the polymer liner. The upper and lower edges of the bead of the polymer bushing greatly increase the strength of the mechanical structure that withstands the pressure of the contents of the polymer liner; and the composite pressure vessel is relatively stable and reliable.

According to the above structural feature, the lower lip of the polymer liner is joined to the second necking section of the polymer bushing; the crimping lip of the upper lip of the polymer inner liner and the outer shell of the composite material and The first necking section of the polymer bushing is joined.

According to the above structural feature, the region where the metal body of the valve seat is joined to the polymer bushing is coated with at least one layer of an adhesive.

According to the above structural feature, the metal body of the valve seat and the polymer bushing are covered with at least one layer of adhesive; the lower lip of the polymer inner lip and the second necking region of the polymer bushing Segment bonding; the upper lip of the polymer liner and the crimping portion of the composite casing and joined to the first necking section of the polymer bushing.

The metal system is provided with an inner connecting portion for the polymer bushing at the other end of the fluid passage provided with the screwing portion, and is protruded between the screwing portion and the inner connecting portion. There is a ring connecting portion, and at least one turn is formed in the inner connecting portion for increasing the joint area of the metal body and the polymer bushing.

The outer edge of the metal body is provided with at least one second molding portion for increasing the bonding area of the metal body and the polymer bushing.

The metal body is provided with at least one anti-rotation portion for interfering with the polymer bushing to restrict relative rotation of the metal body and the polymer bushing.

The thickness of the bead is gradually reduced from the inner side to the outer side.

The metal system is provided with an inner connecting portion for the polymer bushing at the other end of the fluid passage provided with the screwing portion, and is protruded between the screwing portion and the inner connecting portion. a ring-shaped abutting portion, at least one turn at the inner connecting portion for increasing a joint area of the metal body and the polymer bushing; at least one turn at the outer edge of the metal body a second molding portion for increasing a bonding area between the metal body and the polymer bushing; the metal body is provided with at least one anti-interference with the polymer bushing to limit the relative rotation of the metal body and the polymer bushing The turning portion; the thickness of the bead is gradually reduced from the inner side to the outer side.

The method for manufacturing the composite pressure vessel of the present invention comprises the following steps: Step S1 provides a valve seat having a metal body, and a polymer bushing is coated on the outer edge of the metal body, the metal body has a through hole is disposed at one end of the fluid passage, and a screwing portion is disposed at a middle portion of the outer periphery of the fluid bushing. The outer edge of the polymer bushing is opposite to the convex portion. A protruding shoulder is disposed at a position above the ring, and the outer edge of the polymer bushing forms a first necking section between the bead and the shoulder, and the polymer bushing is opposite to the bead The position forms a second necking section; the step S2 provides a polymer preform, the polymer bottle body has a blank formed by injection molding of a polymer material, and a valve body is provided at the top end of the body. The second necking section corresponds to the sleeve fixing portion; the step S3 provides an air blowing forming unit, the air blowing forming unit has a positioning component for socketing the fluid passage of the valve seat, and at least one is available a polymer preform and a mold corresponding to the valve seat, the And having a mold cavity for shaping the polymer preform; step S4 generates a polymer liner, positioning the valve seat sleeve on the positioning component of the blow molding unit, and positioning the polymer preform Positioning the valve seat to position, and then inserting the valve seat and the polymer preform into the mold of the air blowing unit to be positioned, and then introducing high pressure gas into the polymer preform through the fluid passage of the valve seat And the polymer bottle bracket is attached to the cavity of the mold and the valve seat to form a polymer liner corresponding to the cavity of the mold, and the height liner forms a supply a chamber for containing a fluid, and a filling hole communicating with the chamber, the inner edge of the filling hole and the polymer bushing of the valve seat closely fitting, the inner edge of the filling hole and forming a relative position on the valve An upper lip at the upper edge of the bead of the seat, and a lower lip located at a lower edge of the bead of the valve seat; step S5 produces a composite outer casing, and the composite material is bonded to the polymer liner Externally, a composite casing covering the outside of the polymer liner is produced, A composite shell having opposite projecting into the polymer while above the liner and crimping the lip portion engages the shoulder of the seat between the bead and the shoulder of the seat.

According to the above technical feature, the composite pressure vessel manufacturing method, in the step of generating a polymer liner, is to preheat the valve seat, and then introduce high pressure gas to the high through the fluid passage of the valve seat. Inside the molecular flask.

According to the above technical feature, in the method for producing a composite pressure vessel, in the step of producing a polymer liner, a high pressure gas of 5 to 10 kg/cm ² is introduced into the polymer preform through a fluid passage of the valve seat. .

According to the above technical feature, the method for manufacturing the composite pressure vessel, in the step of generating a polymer liner, preheating the valve seat for 20 to 30 seconds at an operating temperature of 120 to 160 degrees Celsius, and then A high pressure gas of 5 to 10 kg/cm ² is introduced into the polymer preform through a fluid passage of the valve seat.

The material of the polymer bushing is the same as the material of the polymer preform.

The material of the polymer bushing may be one of polyethylene (PE), polyamine (PA), polyethylene (PE) or high density polyethylene (HDPE).

The material of the polymer preform may be one of polyethylene (PE), polyamine (PA), polyethylene (PE) or high density polyethylene (HDPE).

The composite material of the composite outer casing may be one of glass fiber or carbon fiber.

The invention mainly utilizes the structural design of the valve seat, and the polymer preform is processed into a polymer inner liner which is directly joined with the valve seat by the blow molding method, and the joint effect between the polymer inner liner and the valve seat can be more sure. Comprehensive, and effectively solve the slight processing defects or dimensional errors, resulting in the joint can not achieve the problem of airtight; in particular, the upper and lower lip of the polymer liner can be simultaneously clamped on the convex ring of the polymer bushing The edge greatly increases the strength of the mechanical structure that withstands the pressure of the contents of the polymer liner, thereby achieving a relatively more stable and reliable composite pressure vessel.

The present invention mainly provides a composite pressure vessel having a relatively more stable structure and reliability, and a composite pressure vessel manufacturing method therefor. As shown in FIGS. 2 to 4, the composite pressure vessel of the present invention includes a valve seat 20, a polymer bladder 30, and a composite casing 40; wherein:

The valve seat 20 has a metal body 21, and a polymer bushing 22 is formed on the outer edge of the metal body 21. The metal body 21 has a through fluid passage 211, and one end of the fluid passage 211 is provided. In the screwing section 212, the polymer bushing 22 is provided with a bead ring 221 at a middle portion of the outer edge of the outer edge of the polymer bushing 22. The outer edge of the polymer bushing 22 is annularly disposed at a position above the bead ring 221 The shoulder 222, the outer edge of the polymer bushing 22 forms a first necking section 223 between the collar 221 and the shoulder 222, and the polymer bushing 22 is formed below the collar 221 A second necking section 224.

The polymer liner 30 is joined to the polymer bushing 22 of the valve seat 20 by means of a blow molding method, and has a chamber 31 for containing a fluid, and a filling hole 32 communicating with the chamber 31. The inner edge of the filling hole 32 is in close contact with the polymer bushing 22 of the valve seat 20, and the inner edge of the filling hole 32 forms an upper lip opposite to the upper edge of the collar 221 of the valve seat 20. 33 and a lower lip 34 located opposite the lower edge of the bezel 221 of the valve seat 20.

The composite material shell 40 is oppositely coated on the outside of the polymer liner 30, and has a convex ring 221 and a shoulder 222 extending relative to the valve seat 20 and simultaneously convex with the polymer inner liner 30. The lip portion 33 and the shoulder portion 222 of the valve seat 20 engage the crimping portion 41.

In the implementation, the material of the polymer bushing 22 may be one of polyethylene (PE), polyamide (PA), polyethylene (PE) or high density polyethylene (HDPE), and is permeable to injection. The molding method is coated on the outer edge of the metal body 21; the material of the polymer liner 30 may be polyethylene (PE), polyamine (PA), polyethylene (PE) or high density polyethylene (HDPE). Alternatively, the composite material used to form the composite outer casing 40 may be one of glass fibers or carbon fibers.

In the composite pressure vessel of the present invention, a switch valve (not shown) can be installed through the metal body 21 of the valve seat 20 according to the actual application or application object, thereby facilitating the replacement of the composite pressure vessel, and Fill in the contents.

Since the polymer liner 30 is directly joined to the polymer bushing 22 of the valve seat 20 during the molding process by the blow molding method, the polymer liner 30 and the polymer bushing 22 of the valve seat 20 can be produced more. In addition to the effective and comprehensive bonding effect, the upper and lower lip 33, 34 of the polymer liner 30 can be simultaneously clamped on the upper and lower edges of the bead ring 221 of the polymer bushing 22, and the core is greatly enhanced. The mechanical structural strength of the pressure of the bladder 30 can be prevented by the pressing action of the crimping portion 41 of the composite outer casing 40 and the shoulder 222 of the polymer bushing 22, preventing the lip 33 on the polymer inner liner 30 from the polymer. The upper edge of the collar 221 of the bushing 22 is peeled off, and the composite outer casing 40 is prevented from being peeled off from the polymer inner liner 30. The structure of the integral composite pressure vessel is relatively more stable and reliable.

Referring to FIG. 2 to FIG. 6 together, the composite pressure vessel of the present invention, when implemented, has a lower lip 34 of the polymer liner 30 and a second necking of the polymer liner 22 The segment 224 is joined, and the lip 31 of the polymer liner 30 and the crimping portion 41 of the composite casing 40 are joined to the first necked portion 223 of the polymer bushing 22, which is not only high. The joint area of the molecular liner 30 and the valve seat 20 is more conducive to enhancing the airtight effect between the polymer liner 30 and the valve seat 20.

In the embodiment, the composite pressure vessel of the present invention, when implemented, the metal body 21 of the valve seat 20 and the polymer bushing 22 are bonded to at least one layer of the adhesive 23, and the at least one layer of the adhesive 23 can be It is one of polyurethane (Pu) or epoxy (Epoxy); mainly under the action of the adhesive 23, a relatively more stable and reliable connection between the metal body 21 and the polymer liner 22 is formed. Sealing effect.

In the embodiment, the composite pressure vessel of the present invention, in the region where the metal body 21 of the valve seat 20 is joined to the polymer bushing 22, can be coated with at least one layer of the adhesive 23, and the polymer liner 30 The lower lip 34 is joined to the second necked portion 224 of the polymer bushing 22, and the convex lip 31 of the polymer inner liner 30 and the crimping portion 41 of the composite material casing 40 and the polymer lining Preferably, the first necked section 223 of the sleeve 22 is joined.

Furthermore, in the composite pressure vessel of the present invention, the metal body 21 of the valve seat 20 can be looped at the other end of the fluid passage 211 provided with the screwing section 212. An inner connecting portion 213 for covering the polymer bushing 22, a ring abutting portion 214 is protruded between the screwing portion 212 and the inner connecting portion 213, and the inner connecting portion 213 is disposed at the inner connecting portion 213 At least one turn is provided to the first molding portion 215 for increasing the bonding area between the metal body 21 and the polymer bushing 22.

The design of the polymer bushing 22 extending to the inner connecting portion 213 can be utilized to increase the joint area of the metal body 21 and the polymer bushing 22, and the gas supplied to the switch valve (not shown) by the abutting portion 214. The dense O-ring is connected to prevent the polymer bushing 22 from being peeled off from the metal body 21 due to improper application of the switch valve; even under the action of the first molding portions 215, the metal body 21 can be effectively added. The joint area of the polymer bushing 22 makes the structure of the integral valve seat 20 more stable and reliable.

The valve seat 20 can also be provided at the outer edge of the metal body 21 with at least one second molding portion 216 for increasing the bonding area of the metal body 21 and the polymer bushing 22, further increasing the metal body 21 and the height. The joint area of the molecular bushing 22.

The valve seat 20 is further provided with at least one anti-rotation portion 217 for restraining the metal body 21 and the polymer bushing 22 from rotating relative to the metal bushing 22, and the metal. The body 21 can be provided with a flange 218 corresponding to the bead ring 221 of the polymer bushing 22 at the outer edge thereof, and the at least one anti-rotation portion 217 can penetrate the flange 218 and can be used by the polymer. The perforated pattern filled by the bushing 22 exhibits an interference effect of restricting the relative rotation of the metal body 21 and the polymer bushing 22, and is more conducive to the molten polymer material when the polymer bushing 22 is injection molded. The desired space is accessed through the flange 218.

Similarly, the thickness of the integral bead ring 221 of the valve seat 20 is gradually reduced from the inner side to the outer side, so that the thickness of the bead ring 221 can be gradually extended from the inner side to the outer side during the blow molding process of the polymer inner liner 30. The reduced design helps the polymer material fill the expected space quickly and smoothly.

Of course, in the composite pressure vessel of the present invention, the metal body 21 of the valve seat 20 can be provided with the other end ring of the screwing section 212 in the fluid passage 211. An inner connecting portion 213 for covering the polymer bushing 22 is disposed, and a ring abutting portion 214 is protruded between the screwing portion 212 and the inner connecting portion 213. At least one turn is provided to increase the joint area of the metal body 21 and the polymer bushing 22, and at least one turn is provided at the outer edge of the metal body 21 for increasing the metal body 21 and the height. The second molding portion 216 of the bonding area of the molecular bushing 22 is provided with at least one anti-rotation for interfering with the polymer bushing 22 to restrict the relative rotation of the metal body 21 and the polymer bushing 22 The portion 217 and the thickness of the bead 221 are preferably reduced from the inner side to the outer side.

Please refer to FIG. 3, FIG. 6, FIG. 7 and FIG. 8 together, and the method for manufacturing the composite pressure vessel of the present invention comprises the following steps:

In the step S1, a valve seat 20 is provided. The valve seat 20 has a metal body 21, and a polymer bushing 22 is formed on the outer edge of the metal body 21. The metal body 21 has a fluid passage 211 extending through One end of the fluid passage 211 is provided with a screwing portion 212. The polymer bushing 22 is integrally provided with a bead ring 221 at a middle portion of the outer edge of the outer edge of the polymer bushing 22, and the outer edge of the polymer bushing 22 is opposite to the bead ring 221 A first shoulder portion 223 is formed between the outer circumference of the polymer bushing 22 and the shoulder 222. The polymer bushing 22 is opposite to the outer sleeve 222. A position below the bead 221 forms a second necked section 224.

In step S2, a polymer preform 30A is provided. The polymer preform 30A has a blank body 31A formed by injection molding of a polymer material, and a second necking for the valve seat 20 is provided at the top end of the green body 31A. Section 224 corresponds to the socketed fixed portion 32A.

In step S3, a blow molding unit is provided. The blow molding unit has a positioning assembly 50 for being sleeved with the fluid passage 211 of the valve seat 20, and at least the polymer preform 30A and the valve seat are provided. 20 corresponding to the inserted mold 60, the mold 60 is provided with a cavity 611 for molding the polymer preform 30A; in practice, the mold 60 has at least two modules 61 for corresponding opening, Each of the modules 61 is provided with a cavity 611 for molding the polymer preform 30A.

In step S4, a polymer inner liner is produced, the valve seat 20 is placed in the positioning assembly 50 of the air blowing forming assembly to be positioned, and the polymer preform 30A is placed on the valve seat 20 to be positioned, and then The valve seat 20 and the polymer preform 30A extend into the mold 60 of the blow molding unit to be positioned, as shown in FIGS. 9 and 10, and then the high pressure gas is introduced through the fluid passage 211 of the valve seat 20 to the In the polymer preform 30A, the polymer preform 30A is bonded to the cavity 611 of the mold 60 and the valve seat 20 to form a polymer having an external shape corresponding to the cavity 611 of the mold 60. The inner casing 30, as shown in Fig. 11, forms a chamber 31 for containing a fluid, and a filling hole 32 communicating with the chamber 31, the inner edge of the filling hole 32 and The polymer bushing 22 of the valve seat 20 is in close contact with the inner edge of the filling hole 32 and forms an upper lip 33 opposite to the upper edge of the bead ring 221 of the valve seat 20, and a relative seat on the valve seat The lower lip 34 at the lower edge of the bead ring 221 of 20.

In step S5, a composite material outer shell is produced, and the composite material is bonded to the outside of the polymer inner liner, and as shown in FIGS. 2 and 3, a composite material outer shell is coated on the outer side of the polymer inner liner 30. 40. The composite material casing 40 has a flange 221 and a shoulder 222 extending relative to the valve seat 20 and simultaneously engages the lip 33 of the polymer liner 30 and the shoulder 222 of the valve seat 20. Crimp portion 41.

In principle, in the method for manufacturing the composite pressure vessel of the present invention, the step of step S1 to step S5 can be performed to complete the fabrication of the composite pressure vessel; likewise, the material of the polymer liner 22 can be polyethylene. One of (PE), polyamine (PA), polyethylene (PE) or high density polyethylene (HDPE), and can be coated on the outer edge of the metal body 21 by injection molding; the polymer preform The material of 30A may be one of polyethylene (PE), polyamide (PA), polyethylene (PE) or high density polyethylene (HDPE); as for the composite material for molding the composite outer casing 40 Then, it may be one of glass fiber or carbon fiber; wherein the material of the polymer bushing 22 is preferably the same as the material of the polymer preform 30A.

Furthermore, in the method for manufacturing a composite pressure vessel according to the present invention, in the step of producing a polymer liner, the valve seat may be preheated, and then the high pressure gas is introduced through the fluid passage of the valve seat to the In the polymer preform, the bonding effect between the polymer materials is increased.

And the method for manufacturing a composite pressure vessel according to the present invention, wherein in the step of producing a polymer liner, a high pressure gas of 5 to 10 kg/cm ² can be introduced into the polymer preform through a fluid passage of the valve seat. According to actual operational experience, it is known that a high pressure gas of 5 to 10 kg/cm ² is introduced into the polymer preform through the fluid passage of the valve seat to obtain a desired molding effect.

Of course, in the method for manufacturing the composite pressure vessel of the present invention, in the step of producing a polymer liner, the valve seat is preheated for 20 to 30 seconds at an operating temperature of 120 to 160 degrees Celsius. Further, by introducing a high-pressure gas of 5 to 10 kg/cm ² into the polymer preform through the fluid passage of the valve seat, a relatively reliable molding effect can be obtained.

Compared with the conventional technology, the invention mainly utilizes the structural design of the valve seat, and combines the processing of the polymer preform into a polymer inner liner which is directly joined with the valve seat, and can make the polymer inner tank and the valve seat. The bonding effect is more accurate and comprehensive, and effectively solves some processing defects or dimensional errors, which may cause the joint to fail to achieve airtightness; in particular, the upper and lower lip of the polymer liner can be simultaneously sandwiched in the polymer lining The upper and lower edges of the collar are used to greatly increase the strength of the mechanical structure that withstands the pressure of the contents of the polymer liner, thereby obtaining a relatively more stable and reliable composite pressure vessel.

The embodiments described above are merely illustrative of the technical spirit and the features of the present invention, and the objects of the present invention can be understood by those skilled in the art, and the scope of the present invention cannot be limited thereto. That is, the equivalent variations or modifications made by the spirit of the present invention should still be included in the scope of the present invention.

[Prior technology]
11‧‧‧Metal seat
12‧‧‧Polymer bushing
13‧‧‧ polymer liner
14‧‧‧Composite casing
[this invention]
20‧‧‧ valve seat
21‧‧‧Metal body
211‧‧‧ fluid passage
212‧‧‧Spiral section
213‧‧‧Inline section
214‧‧‧ Receiving Department
215‧‧‧First Modeling Department
216‧‧‧Second molding department
217‧‧‧Anti-rotation department
218‧‧‧Flange
22‧‧‧Polymer bushing
221‧‧‧ collar
222‧‧‧ Shoulder
223‧‧‧First necking section
224‧‧‧Second necking section
23‧‧‧Adhesive
30‧‧‧ polymer liner
31‧‧‧ chamber
32‧‧‧ Filling holes
33‧‧‧Upper lip
34‧‧‧Lower lip
30A‧‧‧ polymer preform
31A‧‧‧ Body
32A‧‧‧Fixed Department
40‧‧‧Composite casing
41‧‧‧ Crimp
50‧‧‧ Positioning components
60‧‧‧Mold
61‧‧‧ modules
611‧‧‧ cavity
S1~S5 steps

Figure 1 is a partial cross-sectional view of a conventional composite pressure vessel. Fig. 2 is a perspective view showing the appearance of the composite pressure vessel of the present invention. Figure 3 is a cross-sectional view showing a partial structure of the composite pressure vessel of the present invention. Fig. 4 is a perspective view showing the appearance of a valve seat in the present invention. Fig. 5 is a perspective view showing the appearance of a metal body to which the valve seat belongs in the present invention. Figure 6 is a cross-sectional view showing a partial structure of a valve seat in the present invention. Figure 7 is a basic flow chart of the method for manufacturing a composite pressure vessel of the present invention. Figure 8 is a schematic view showing the structure of a polymer preform and a blow molding unit in the composite pressure vessel manufacturing method of the present invention. Fig. 9 is a schematic view showing the operation state in which the valve seat and the polymer preform are placed in the air-molding unit to be positioned by using the composite pressure vessel manufacturing method of the present invention. Fig. 10 is a schematic view showing the operation state of the composite preformed pressure vessel using the composite pressure vessel of the present invention in a state in which the polymer preform is attached to the cavity of the mold and the valve seat. Fig. 11 is a partial cross-sectional view showing the method of manufacturing a composite pressure vessel according to the present invention in which a polymer preform is placed in contact with a cavity of the mold and the valve seat. Fig. 12 is a cross-sectional view showing a partial structure of a polymer liner produced by using the composite pressure vessel manufacturing method of the present invention so that the polymer preform bracket is bonded to the cavity of the mold and the valve seat.

Claims (16)

A composite pressure vessel includes: a valve seat, a polymer liner, and a composite material casing; wherein: the valve seat has a metal body, and a polymer lining is coated on the outer edge of the metal body The metal body has a through-flowing fluid passage, and a screwing section is disposed at one end of the fluid passage, and the polymer bushing is provided with a convex ring at a middle portion of the outer edge thereof, and the polymer bushing is The outer edge of the outer edge of the bead is disposed with a shoulder, and the outer edge of the polymer bushing forms a first necking section between the bead and the shoulder, and the polymer bushing is opposite Forming a second necking section at a position below the bead; wherein the outer edge of the metal body is provided with at least one square wave shape for increasing the joint area of the metal body and the polymer bushing The polymer liner is joined to the polymer bushing of the valve seat by means of a blow molding method, and has a chamber for containing a fluid, and a filling hole communicating with the chamber, the filling hole The inner edge is closely attached to the polymer bushing of the valve seat, Filling the inner edge of the hole and forming an upper lip opposite to the top surface of the bead of the valve seat and a lower lip opposite to the side of the bead of the valve seat and extending to the bottom surface of the bead; the composite material The outer casing is oppositely coated on the outer portion of the polymer inner casing, and has a convex portion and a shoulder extending relative to the valve seat and simultaneously engaging the convex lip of the polymer inner tank and the shoulder of the valve seat Crimp section. The composite pressure vessel according to claim 1, wherein the polymer inner lip has a lip and is engaged with the second necking section of the polymer bushing; the polymer inner cap has a lip and the lip a crimping portion of the composite outer casing and engaging the first necked section of the polymeric bushing. The composite pressure vessel according to claim 1, wherein the metal body of the valve seat and the polymer bushing are covered with at least one layer of an adhesive. The composite pressure vessel according to claim 1, wherein the metal body of the valve seat and the polymer bushing are covered with at least one layer of adhesive; the polymer liner is convex. a lip is joined to the second necking section of the polymer bushing; the convex lip of the polymer inner liner and the crimping portion of the composite material shell are joined to the first necking section of the polymer bushing . The composite pressure vessel according to any one of claims 1 to 4, wherein the metal system is provided with a loop for the polymer bushing at the other end of the fluid passage provided with the screwing section. a connecting portion, a ring abutting portion is protruded between the screwing portion and the inner connecting portion, and at least one ring is looped at the inner connecting portion for adding the metal body to the polymer bushing The first shape part of the area. The composite pressure vessel according to any one of claims 1 to 4, wherein the metal body is provided with at least one for interfering with the polymer bushing to limit the relative rotation of the metal body and the polymer bushing. Anti-rotation department. The composite pressure vessel according to any one of claims 1 to 4, wherein the thickness of the bead is gradually reduced from the inner side to the outer side. The composite pressure vessel according to any one of claims 1 to 4, wherein the metal system is provided with a loop for the polymer bushing at the other end of the fluid passage provided with the screwing section. a connecting portion, a ring abutting portion is protruded between the screwing portion and the inner connecting portion, and at least one ring is looped at the inner connecting portion for adding the metal body to the polymer bushing a first molding portion of the area; a second molding portion of the outer edge of the metal body at least one square wave shape for increasing the bonding area between the metal body and the polymer bushing; at least one of the metal body is provided The anti-rotation portion that interferes with the polymer bush to restrict the relative rotation of the metal body and the polymer bushing; the thickness of the bead is gradually reduced from the inner side to the outer side. A composite pressure vessel manufacturing method includes the following steps: Step S1, providing a valve seat having a metal body, and a polymer bushing is coated on an outer edge of the metal body, the metal body having a a threaded passage is formed at one end of the fluid passage, and the polymer bushing is provided with a coil at a middle portion of the outer edge thereof, and the outer edge of the polymer bushing is opposite to the collar a shoulder is arranged at the upper position, and the polymer bushing is Forming a first necking section between the bead and the shoulder, the polymer bushing forms a second necking section with respect to a position below the bead; and step S2, providing a polymer a preform, the polymer preform has a blank formed by injection molding of a polymer material, and a fixing portion for receiving a corresponding sleeve with the second necking portion of the valve seat is disposed at a top end of the green body; and step S3 Providing a blow molding unit having a positioning assembly for splicing a fluid passage with the valve seat, and a mold at least for the polymer preform and the valve seat correspondingly disposed The mold is provided with a cavity for molding the polymer preform; in step S4, a polymer liner is produced, the valve seat sleeve is placed on the positioning component of the air blowing unit, and the polymer bottle is positioned. The embryo sleeve is placed on the valve seat to be positioned, and then the valve seat and the polymer preform are inserted into the mold of the air blowing unit to be positioned, and then the high pressure gas is introduced into the polymer preform through the fluid passage of the valve seat. Inside, the polymer preform is formed into a cavity with the mold and the valve Laminating to produce a polymer liner corresponding to the cavity of the mold, the height liner forming a chamber for containing a fluid, and a filling hole communicating with the chamber, the filling hole The inner edge is closely adhered to the polymer bushing of the valve seat, and the inner edge of the filling hole forms an upper lip opposite to the top surface of the bead of the valve seat, and a convex ring located opposite to the valve seat The side edge extends along the lower lip extending to the bottom surface of the bead; in step S5, a composite material outer shell is formed, and the composite material is bonded to the outside of the polymer inner liner to produce a composite coating on the outer portion of the polymer inner liner. a material outer casing having a crimping portion that extends between the bead and the shoulder of the valve seat and simultaneously engages the convex lip of the polymer inner liner and the shoulder of the valve seat. The method for manufacturing a composite pressure vessel according to claim 9, wherein the method for producing a composite pressure vessel, in the step of producing a polymer liner, is to preheat the valve seat and then pass the The fluid passage of the valve seat introduces high pressure gas into the polymer preform. The method for manufacturing a composite pressure vessel according to claim 9, wherein the composite pressure vessel manufacturing method is configured to introduce a polymer bladder into the fluid passage through the valve seat by 5 to 10 kg/cm. ² high pressure gas into the polymer preform. The method for manufacturing a composite pressure vessel according to claim 9, wherein the method for manufacturing the composite pressure vessel is in the step of generating a polymer liner, first at a working temperature of 120 to 160 degrees Celsius After the valve seat is preheated for 20 to 30 seconds, a high pressure gas of 5 to 10 kg/cm ² is introduced into the polymer preform through the fluid passage of the valve seat. The method for producing a composite pressure vessel according to any one of claims 9 to 12, wherein the material of the polymer bushing is the same as the material of the polymer preform. The method of manufacturing a composite pressure vessel according to any one of claims 9 to 12, wherein the material of the polymer bushing is polyethylene (PE), polyamine (PA), polyethylene (PE). Or one of high density polyethylene (HDPE). The method of manufacturing a composite pressure vessel according to any one of claims 9 to 12, wherein the material of the polymer preform is polyethylene (PE), polyamine (PA), polyethylene (PE). Or one of high density polyethylene (HDPE). The composite pressure vessel manufacturing method according to any one of claims 9 to 12, wherein the composite material of the composite material shell is one of glass fiber or carbon fiber.