Vulcanization forming mold for marine rubber flexible joint

Abstract

The invention relates to the technical field of vulcanization forming molds, in particular to a vulcanization forming mold for a marine rubber flexible joint, a middle penetrating rod and a pair of side penetrating rods are mounted between a middle mold and a lower mold, and the pair of side penetrating rods are symmetrically arranged on the two sides of the middle penetrating rod; the framework cavity is arranged between the side penetrating rod and the middle penetrating rod; a framework supporting rod is installed between the side penetrating rod and the middle penetrating rod and used for penetrating through a through hole formed in the metal framework, so that the metal framework is in a suspended state in the framework cavity. A side stop block is mounted on the side penetrating rod, and a middle stop block is mounted on the middle penetrating rod; the side check blocks and the middle check blocks are used for abutting against the two ends of the metal framework respectively. According to the invention, the flatness problem of the skeleton product is solved, the qualified rate and the inspection efficiency of the product are improved, and the demolding problem of the product is solved.

Description

Technical Field

[0001] The invention relates to the technical field of vulcanization molding dies, and in particular to a vulcanization molding die for a marine rubber flexible joint. Background Art

[0002] Marine rubber flexible joints mainly have the following functions:

[0003] Axial displacement compensation: In the marine environment, due to factors such as the flow of seawater, temperature changes, and the operation of marine facilities, the pipeline will experience axial thermal expansion and contraction. The rubber flexible joint can be stretched or compressed to a certain extent in the axial direction to absorb the axial displacement changes of the pipeline and prevent the pipeline from being damaged due to excessive axial stress.

[0004] Lateral displacement compensation: Pipelines in marine engineering may be affected by lateral forces such as waves and currents, causing lateral displacement of the pipeline. The flexible structure of the rubber flexible joint allows the pipeline to move laterally within a certain range, thereby adapting to this lateral displacement and protecting the safety of the pipeline system.

[0005] Angular displacement compensation: When there is an angular deviation at both ends of the pipe connection or a certain angular error occurs during the installation process, the rubber flexible joint can compensate for this angular displacement through its own elastic deformation to ensure the tightness of the pipe connection and normal operation.

[0006] Shock absorption: In marine facilities such as offshore platforms and ships, the operation of various equipment and the impact of waves will generate vibrations. When these vibrations are transmitted through pipelines, rubber flexible joints can use the elastic properties of rubber to convert vibration energy into rubber deformation energy, thereby effectively reducing the transmission of vibrations, reducing the vibration amplitude of the pipeline system, and protecting the safety of pipelines and related equipment.

[0007] Noise reduction: The reduction of vibration also helps to reduce the noise generated during the operation of the pipeline system. The rubber flexible joint can absorb the sound wave energy in the pipeline, reduce the transmission of noise, and provide quieter working and living conditions in the marine environment.

[0008] Prevent seawater corrosion: Seawater contains a lot of salt, minerals and other chemicals, which are highly corrosive to metal materials. Rubber flexible joints are made of seawater corrosion-resistant rubber materials, such as chloroprene rubber, EPDM rubber, etc. These materials can effectively resist the corrosive components in seawater, protect the pipeline system from the influence of seawater corrosion, and extend the service life of the pipeline.

[0009] Easy installation: The rubber flexible joint is light, small, and flexible. It does not require complicated tools and equipment during installation and can be quickly and easily installed on the pipeline. It has various connection methods, such as flange connection, threaded connection, clamp connection, etc., which can meet different pipeline connection requirements.

[0010] Easy maintenance: Compared with traditional metal joints, rubber flexible joints are not easy to rust or scale, and have low maintenance costs. When replacement or repair is needed, just remove the old joint and replace it with a new one, which is simple and convenient to operate.

[0011] Adapt to uneven settlement of pipelines: In marine engineering, the geological conditions of the seabed are complex, and pipelines may be affected by uneven settlement of the foundation. Rubber flexible joints can adapt to uneven settlement of pipelines to a certain extent, avoid stress concentration and damage caused by settlement, and ensure the stability of the pipeline system.

[0012] In order to prevent the rubber flexible joint from rusting, the metal frame of the rubber flexible joint is now mostly made of stainless steel, and then the rubber is attached to the frame. For this type of rubber flexible joint, how to make the product flatness meet the requirements during production and how to improve the efficiency of product vulcanization demoulding have become issues that the industry needs to solve urgently. Summary of the invention

[0013] In order to solve the problem of how to make the product flatness meet the requirements and how to improve the demoulding efficiency of the product, the purpose of the present invention is to provide a vulcanization molding mold for marine rubber flexible joints.

[0014] The technical solution provided by the present invention is:

[0015] In a first aspect, a vulcanization molding mold for a marine rubber flexible joint comprises a lower mold, a middle mold, and an upper mold stacked in sequence; the lower mold is provided with a lower mold cavity, the middle mold is provided with a middle mold cavity adapted to the lower mold cavity; the lower mold cavity and the middle mold cavity form a skeleton cavity; the middle mold is also provided with a glue injection port connected to the skeleton cavity;

[0016] A middle through rod and a pair of side through rods are installed between the middle die and the lower die. The pair of side through rods are symmetrically arranged on both sides of the middle through rod. The skeleton cavity is arranged between the side through rods and the middle through rod.

[0017] A frame support rod is installed between the side penetration rod and the middle penetration rod. The frame support rod is used to pass through the through hole provided on the metal frame, so that the metal frame is suspended in the frame cavity.

[0018] A side stopper is installed on the side penetration rod, and a middle stopper is installed on the middle penetration rod; the side stopper and the middle stopper are respectively used to abut against two ends of the metal frame.

[0019] As an optional technical solution of the first aspect, the end faces of the side block and the middle block close to the metal frame are roughly circular, and the diameter of the circular face is denoted by R; the through holes provided on the metal frame are distributed in a ring along the end face of the metal frame, and the distance between two radially symmetrical through holes is L; wherein R<L.

[0020] Optionally, the side block is fixedly connected to the side penetrating rod; and the middle block is movably connected to the middle penetrating rod.

[0021] Furthermore, the middle stopper includes a connecting portion and end surfaces located at both ends of the connecting portion; a cross section passing through the axis of the middle stopper is substantially in the shape of an “I”;

[0022] The middle penetrating rod is provided with a first slot for accommodating the connecting portion to pass through, and there is a clearance fit between the connecting portion and the first slot.

[0023] As an optional technical solution of the first aspect, one end of the skeleton support rod is fixedly connected to the side through rod, and the other end is movably connected to the middle through rod.

[0024] Optionally, the middle through rod is provided with a second slot for accommodating the end of the skeleton support rod to be inserted; the length of the end of the skeleton support rod inserted into the second slot is not less than 10 mm.

[0025] As an optional technical solution of the first aspect, an insert strip is inserted on the middle mold and / or the lower mold; the side penetration rod is provided with a side penetration rod insert strip hole for accommodating the insert strip to pass through; the middle penetration rod is provided with a middle penetration rod insert strip hole for accommodating the insert strip to pass through; the insert strip is used to prevent the side penetration rod and the middle penetration rod from floating up.

[0026] Optionally, the side penetration rod is fixedly connected to the lower mold.

[0027] As an optional technical solution of the first aspect, it also includes a through-rod positioning mechanism, which is used to locate the installation positions of the side through-rods and the middle through-rod;

[0028] The through-rod positioning mechanism comprises a plurality of through-rod positioning pins fixedly connected to the lower die; the side through-rods are provided with side through-rod positioning pin holes for inserting the through-rod positioning pins; and the middle through-rods are provided with middle through-rod positioning pin holes for inserting the through-rod positioning pins.

[0029] As an optional technical solution of the first aspect, it also includes a module positioning mechanism, which is used to locate the installation positions of the middle mold, the upper mold and the lower mold;

[0030] The module positioning mechanism includes a plurality of module positioning pins fixedly connected to the lower mold; the middle mold is provided with a middle mold positioning pin hole through which the module positioning pins pass; and the upper mold is provided with an upper mold positioning pin hole into which the module positioning pins are inserted.

[0031] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0032] The present invention can support the metal skeleton by providing a skeleton support rod, so that the metal skeleton is suspended in the skeleton cavity, which is convenient for rubber attachment. On the other hand, the side blocks and the middle blocks provided in cooperation support the metal skeleton, ensuring that the flatness of the metal skeleton after rubber coating is less than 0.5 mm, so that the flatness of the product meets the requirements and improves the product quality. In addition, since the side through rods and the middle through rods are provided, the through rods can be lifted together during demoulding, so that multiple products can be taken out of the cavity at the same time, thereby improving efficiency. In addition, by installing the inserts, the side through rods and the middle through rods can be prevented from floating up, which helps to improve product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of a rubber flexible joint;

[0034] Figure 2 A schematic diagram of a through hole provided for a rubber flexible joint;

[0035] Figure 3 This is a schematic diagram of a mold installation insert in one embodiment of the present application;

[0036] Figure 4 This is a cross-sectional view of a mold in one embodiment of the present application;

[0037] Figure 5 This is a schematic diagram of the installation of the side block and the middle block in one embodiment of the present application;

[0038] Figure 6 This is a cross-sectional view of the lower mold in one embodiment of the present application;

[0039] Figure 7 A top view of a middle mold in one embodiment of the present application;

[0040] Figure 8 This is a cross-sectional view of a mold in one embodiment of the present application;

[0041] Fig. 9 This is a schematic diagram of the installation of the skeleton support rods in one embodiment of the present application;

[0042] Fig.10 This is a schematic diagram of a side stopper installed on a side penetration rod in one embodiment of the present application;

[0043] Fig.11 This is a schematic diagram of a through rod in one embodiment of the present application.

[0044] Explanation of the symbols in the schematic diagram:

[0045] Rubber flexible joint 101, through hole 102;

[0046] Upper mold 201;

[0047] Middle mold 301, glue injection hole 302, middle mold positioning pin hole 303, middle mold cavity 304, middle mold rod slot 305;

[0048] Lower mold 401, module positioning pin 402, through-rod positioning pin 404, lower mold cavity 405, lower mold through-rod slot 406;

[0049] Side penetrating rod 501, frame support rod 502, screw 503, side penetrating rod insert hole 504, side penetrating rod locating pin hole 505, frame support rod mounting hole 506;

[0050] Middle through rod 601, middle through rod positioning pin hole 602, middle through rod insertion hole 603, first clamping slot 604, second clamping slot 605;

[0051] Insert strip 701 , side block 702 , middle block 703 . DETAILED DESCRIPTION

[0052] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0053] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of implementation. The change or adjustment of their relative relationship should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0054] The structure of the rubber flexible joint 101 is as follows Figure 1-2 As shown, the rubber flexible joint 101 is supported by covering a metal frame with rubber. The material of the metal frame can be 304 stainless steel. A plurality of through holes 102 arranged in an annular shape are provided at both ends of the rubber flexible joint 101, and the through holes 102 at both ends correspond to each other in the axial direction.

[0055] In one embodiment, if Figure 3-11As shown, the present application proposes a vulcanization molding mold for marine rubber flexible joints, and the mold includes a lower mold 401, a middle mold 301, and an upper mold 201 stacked in sequence. Among them, the lower mold 401 is provided with a lower model cavity 405, and the middle mold 301 is provided with a middle model cavity 304 adapted to the lower model cavity 405. The lower model cavity 405 and the middle model cavity 304 form a skeleton cavity. A metal skeleton can be filled in each skeleton cavity. In order to improve production efficiency, a set of molds can be provided with multiple pairs of lower model cavities 405 and middle model cavities 304, that is, multiple skeleton cavities are provided, so that multiple rubber flexible joints 101 can be produced simultaneously through a set of molds. In this embodiment, as Figure 3 As shown, a set of molds is provided with six skeleton cavities.

[0056] like Figure 3 , 4 As shown in , 7, a glue injection port 302 is provided on the middle mold 301, and the glue injection port 302 is connected to the skeleton cavity. A rubber embryo groove is also provided on the upper surface of the middle mold 301, and the rubber embryo groove is used to store the rubber. When the upper mold 201 is closed, under the extrusion of the upper mold 201, the rubber enters the skeleton cavity through the glue injection port 302, and the rubber entering the skeleton cavity can be coated on the metal skeleton to form a rubber flexible joint 101.

[0057] A middle through rod 601 and a pair of side through rods 501 are installed between the middle mold 301 and the lower mold 401, and the pair of side through rods 501 are symmetrically arranged on both sides of the middle through rod 601. The skeleton cavity is arranged between the side through rods 501 and the middle through rod 601. In order to facilitate the installation of the side through rods 501 and the middle through rod 601, and to avoid the middle mold 301 and the lower mold 401 from being difficult to be tightly molded after the side through rods 501 and the middle through rod 601 are installed, a middle mold through rod groove 305 is provided on the middle mold 401, and a lower mold through rod groove 406 is provided on the lower mold 401. The middle mold through rod groove 305 corresponds to the lower mold through rod groove 406, and the two form a through rod groove, thereby accommodating the insertion of the side through rod 501 and the middle through rod 601.

[0058] A skeleton support rod 502 is installed between the side penetration rod 501 and the middle penetration rod 601. The arrangement spacing and position of the skeleton support rod 502 correspond to the through hole 102 provided on the metal skeleton. When the metal skeleton is filled into the skeleton cavity, the skeleton support rod 502 needs to pass through the through hole 102 provided on the metal skeleton, and the two are matched with a clearance, for example, 0.05mm. Under the support of the skeleton support rod 502, the metal skeleton is in a suspended state in the skeleton cavity. When the rubber flows into the skeleton cavity, the rubber can adhere to the surface of the metal skeleton.

[0059] The side through rod 501 is provided with a side block 702, and the middle through rod 601 is provided with a middle block 703. After the metal frame is filled into the frame cavity and the frame support rod 502 passes through the through hole 102 provided on the metal frame, the side block 702 and the middle block 703 respectively abut against the two ends of the metal frame, thereby ensuring the flatness, so that the final flatness of the product meets the requirements.

[0060] In an optional embodiment, the end faces of the side block 702 and the middle block 703 close to the metal frame are roughly circular, and the diameter of the circular face is recorded as R. The through holes 102 provided on the metal frame are distributed in an annular manner along the end face of the metal frame, and the distance between two radially symmetrical through holes 102 is L. Where R < L, for example, R is 0.15 mm smaller than L, at this time, the support force of the block can be guaranteed, and the flatness of the metal frame after rubber coating can be guaranteed to be less than 0.5 mm.

[0061] As for the installation method of the side block 702 and the middle block 703, in one embodiment, the side block 702 is fixedly connected to the side penetration rod 501, for example, firmly embedded in the side penetration rod 501. The middle block 703 is movably connected to the middle penetration rod 601. At this time, the middle block 703 is easy to disassemble. When filling the metal frame, the frame support rod 502 can be passed through the through hole 102 provided on the metal frame, and then the side block 702 is placed against one end face of the metal frame, and finally the middle block 703 is installed against the other end face of the metal frame.

[0062] As for the structure of the middle block 703, optionally, the middle block 703 includes a connecting portion and end faces at both ends of the connecting portion, that is, the cross section passing through the axis of the middle block 703 is roughly in the shape of an "I". The middle through rod 601 is provided with a first slot 604 for the connecting portion to pass through, and there is a clearance fit between the connecting portion and the first slot 604, for example, 0.25 mm, so that the middle block 703 is easy to disassemble and assemble.

[0063] Regarding the installation method of the skeleton support rod 502, in an optional implementation scheme, one end of the skeleton support rod 502 is fixedly connected to the side through rod 501. For example, the side through rod 501 is provided with a skeleton support rod mounting hole 506, and one end of the skeleton support rod 502 is inserted into the skeleton support rod mounting hole 506 and fixed by glue or welding. The other end of the skeleton support rod 502 is movably connected to the middle through rod 601. At this time, when demolding, the side through rod 501 and the middle through rod 601 can be lifted together, so that all products can be taken out of the mold cavity. Then, all products can be removed from the skeleton support rod 502 by only removing the middle through rod 601.

[0064] The middle through rod 601 is provided with a second slot 605 for inserting the end of the frame support rod 502. The length of the end of the frame support rod 502 inserted into the second slot 605 is not less than 10 mm, which can ensure that the frame support rod 502 can stably support the metal frame and avoid the mold from being deformed during injection.

[0065] In order to prevent the side-penetrating rod 501 and the middle-penetrating rod 601 from moving during the injection of glue and affecting the precision of the product, an insertion strip 701 is inserted into the middle mold 301 and / or the lower mold 401. The side-penetrating rod 501 is provided with a side-penetrating rod insertion strip hole 504 for allowing the insertion strip 701 to pass through, and the middle-penetrating rod 601 is provided with a middle-penetrating rod insertion strip hole 603 for allowing the insertion strip 701 to pass through. When the insertion strip 701 is inserted into the middle mold 301 and / or the lower mold 401, the insertion strip 701 also passes through the side-penetrating rod insertion strip hole 504 and the middle-penetrating rod insertion strip hole 603. At this time, under the limiting effect of the insertion strip 701, the side-penetrating rod 501 and the middle-penetrating rod 601 can be prevented from floating up.

[0066] In addition, in order to further prevent the side penetration rod 501 from moving, the side penetration rod 501 can be fixedly connected to the lower mold 401, for example, the side penetration rod 501 is fixedly connected to the lower mold 401 by screws 503. When demolding, the screws 503 are removed, and the side penetration rod 501 and the middle penetration rod 601 can be lifted together.

[0067] In an optional embodiment, the mold further includes a penetration rod positioning mechanism, through which the installation positions of the side penetration rods 501 and the middle penetration rod 601 can be positioned, thereby further improving the flatness of the product. The penetration rod positioning mechanism includes a plurality of penetration rod positioning pins 404 fixedly connected to the lower mold 401. The side penetration rod 401 is provided with a side penetration rod positioning pin hole 505 for inserting the penetration rod positioning pin 404, and the middle penetration rod 601 is provided with a middle penetration rod positioning pin hole 602 for inserting the penetration rod positioning pin 404.

[0068] The mold further includes a module positioning mechanism, through which the installation positions of the middle mold 301, the upper mold 201 and the lower mold 401 can be positioned. Specifically, the module positioning mechanism includes a plurality of module positioning pins 402 fixedly connected to the lower mold 401. The middle mold 301 is provided with a middle mold positioning pin hole 303 through which the module positioning pins 402 pass, and the upper mold 201 is provided with an upper mold positioning pin hole into which the module positioning pins 402 are inserted.

[0069] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A vulcanization molding mold for a marine rubber flexible joint, comprising a lower mold (401), a middle mold (301), and an upper mold (201) stacked in sequence; the lower mold (401) is provided with a lower mold cavity (405), and the middle mold (301) is provided with a middle mold cavity (304) adapted to the lower mold cavity (405); the lower mold cavity (405) and the middle mold cavity (304) form a skeleton cavity; the middle mold (301) is also provided with a glue injection port (302) connected to the skeleton cavity; Features: middle A middle penetration rod (601) and a pair of side penetration rods (501) are installed between the mold (301) and the lower mold (401), and the pair of side penetration rods (501) are symmetrically arranged on both sides of the middle penetration rod (601); the skeleton cavity is arranged between the side penetration rods (501) and the middle penetration rod (601); A frame support rod (502) is installed between the side penetration rod (501) and the middle penetration rod (601), and the frame support rod (502) is used to pass through the through hole (102) provided in the metal frame, so that the metal frame is in a suspended state in the frame cavity; A side stopper (702) is installed on the side penetration rod (501), and a middle stopper (703) is installed on the middle penetration rod (601); the side stopper (702) and the middle stopper (703) are respectively used to abut against the two ends of the metal frame.

2. The vulcanization molding die for marine rubber flexible joint according to claim 1, characterized in that: The end surfaces of the side block (702) and the middle block (703) close to the metal frame are roughly circular surfaces, and the diameter of the circular surface is denoted by R; The metal frame is provided with through holes (102) distributed in an annular manner along the end surface of the metal frame, and the distance between two radially symmetrical through holes (102) is L; Where R<L.

3. The vulcanization molding die for marine rubber flexible joint according to claim 2, characterized in that: The side block (702) is fixedly connected to the side penetration rod (501); and the middle block (703) is movably connected to the middle penetration rod (601).

4. The vulcanization molding die for marine rubber flexible joint according to claim 3, characterized in that: The middle stopper (703) comprises a connecting portion and end surfaces located at both ends of the connecting portion; a cross section passing through the axis of the middle stopper (703) is substantially in the shape of an "I" character; The middle penetration rod (601) is provided with a first clamping groove (604) for accommodating the connecting portion to pass through, and there is a clearance fit between the connecting portion and the first clamping groove (604).

5. The vulcanization molding die for marine rubber flexible joint according to claim 1, characterized in that: One end of the skeleton support rod (502) is fixedly connected to the side through rod (501), and the other end is movably connected to the middle through rod (601).

6. The vulcanization molding die for marine rubber flexible joint according to claim 5, characterized in that: The middle through rod (601) is provided with a second slot (605) for accommodating the end of the frame support rod (502) to be inserted; The length of the end of the skeleton support rod (502) inserted into the second slot (605) is not less than 10 mm.

7. The vulcanization molding die for marine rubber flexible joint according to claim 1, characterized in that: The middle mold (301) and / or the lower mold (401) are provided with an insert strip (701); The side-penetrating rod (501) is provided with a side-penetrating rod insertion hole (504) for accommodating the insertion strip (701) to pass through; The middle through rod (601) is provided with a middle through rod insertion hole (603) for accommodating the insertion strip (701) to pass through; The inserting strip (701) is used to prevent the side-penetrating rod (501) and the middle-penetrating rod (601) from floating up.

8. The vulcanization molding die for marine rubber flexible joint according to claim 8, characterized in that: The side penetration rod (501) is fixedly connected to the lower mold (401).

9. The vulcanization molding die for marine rubber flexible joint according to any one of claims 1 to 8, characterized in that: It also includes a penetration rod positioning mechanism, which is used to locate the installation positions of the side penetration rods (501) and the middle penetration rod (601); The penetration rod positioning mechanism comprises a plurality of penetration rod positioning pins (404) fixedly connected to the lower mold (401); the side penetration rod (401) is provided with a side penetration rod positioning pin hole (505) for accommodating the penetration rod positioning pin (404) to be inserted; and the middle penetration rod (601) is provided with a middle penetration rod positioning pin hole (602) for accommodating the penetration rod positioning pin (404) to be inserted.

10. The vulcanization molding die for marine rubber flexible joint according to any one of claims 1 to 8, characterized in that: It also includes a module positioning mechanism, which is used to locate the installation positions of the middle mold (301), the upper mold (201) and the lower mold (401); The module positioning mechanism comprises a plurality of module positioning pins (402) fixedly connected to the lower mold (401); the middle mold (301) is provided with middle mold positioning pin holes (303) through which the module positioning pins (402) pass; and the upper mold (201) is provided with upper mold positioning pin holes through which the module positioning pins (402) are inserted.

Images