Strip forming die for pipeline repair and forming process of strip forming die

Abstract

The strip forming mold for pipeline repair comprises a mold base, a sliding groove is formed in the upper surface of the interior of the mold base, symmetrically-arranged main mold blocks are connected to the interior of the sliding groove through an adjusting mechanism, a forming hole is formed in the surface of one side of each main mold block, an inner cavity is formed in each main mold block, and the inner cavities communicate with the forming holes; a groove is formed in the mold base and located on the front side of the sliding groove, an auxiliary mold block is arranged in the groove, a through hole is formed in the auxiliary mold block and corresponds to the inner cavity, an auxiliary forming hole is formed in the surface of the front side of the auxiliary mold block, a pushing and lifting assembly is arranged at the lower end of the auxiliary mold block, and a heating pipe is fixedly connected to the inner wall of the inner cavity. A feeding hole is formed in one side of the heating pipe, and a connecting pipe is arranged at one end of the feeding hole. And the situation that a corresponding forming mold needs to be developed when one kind of repair strip is produced is avoided, so that the production cost of the repair strip is reduced, meanwhile, troubles of workers are reduced, and the use flexibility of the forming mold is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline repair strip molds, in particular to a strip forming mold for pipeline repair and a forming process thereof. Background Art

[0002] After years of operation, pipelines will inevitably suffer from various damages and leaks due to corrosion, poor operation and management, causing serious economic losses. However, replacing new pipelines along the entire line is not only a huge project, but also costly. Therefore, pipelines need to be repaired. Currently, there are two ways to repair pipelines. One is excavation repair, which generally involves digging up the ground and then exposing the underground pipelines for repair. The other is trenchless repair, which generally involves using repair tape and mechanical equipment to mechanically spirally wrap the repair tape around the inner wall of the pipeline.

[0003] The existing repair strips are generally prefabricated special-shaped continuous PVC strip profiles in factories, and are usually produced by using a molding die and an extruder to cooperate with each other. However, the existing molding dies are generally fixed, and there are many types of special-shaped profiles. Therefore, a special-shaped mold needs to be developed for each special-shaped profile repair strip, which increases the cost of producing the repair strips. At the same time, it is necessary to continuously develop corresponding molds, which is troublesome and reduces the flexibility of using the molding molds. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a strip forming die and a forming process for pipeline repair, which solves the problem that traditional forming dies are fixed and cannot be changed, and avoids the need to develop corresponding forming dies for producing a repair strip, thereby reducing the cost of producing the repair strip, while reducing the trouble for staff and improving the flexibility of using the forming die.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a strip forming mold for pipeline repair, comprising a mold base, a slide groove is provided on the internal upper surface of the mold base, and a symmetrically arranged main mold block is connected to the interior of the slide groove through an adjustment mechanism, a forming hole is provided on one side surface of the main mold block, and an inner cavity is provided inside the main mold block, the inner cavity and the forming hole are communicated, a groove is provided inside the mold base, and the groove is located on the front side of the slide groove, a secondary mold block is provided inside the groove, and a through hole is provided inside the secondary mold block, the through hole corresponds to the inner cavity, and a secondary forming hole is provided on the front side surface of the secondary mold block, a push-up assembly is provided at the lower end of the secondary mold block, a heating pipe is fixedly connected to the inner wall of the inner cavity, and a feeding hole is provided on one side of the heating pipe, a connecting pipe is provided at one end of the feeding hole, and one end of the connecting pipe is fixedly connected to the outer surface of the main mold block, and the other end of the connecting pipe is fixedly connected to an extruder.

[0006] Preferably, the extruder comprises an extrusion cylinder, and a side surface of one end of the extrusion cylinder is fixedly connected to a feed port, a motor is fixedly mounted on one end of the extrusion cylinder, and one end of the motor passes through the extrusion cylinder and is connected to an auger.

[0007] Preferably, the adjustment mechanism comprises a positioning plate, and a screw is rotatably connected inside the positioning plate, a slider is threadedly connected to the side surface of the screw, and the upper surface of the slider is fixedly connected to the lower surface of the main mold block.

[0008] Preferably, the inner surface of the main mold block is provided with a main connection groove, and the rear side of the main mold block is provided with a connection pin corresponding to the main connection groove.

[0009] Preferably, auxiliary connection grooves are formed on both side surfaces of the auxiliary mold block, and the auxiliary connection grooves correspond to the main connection grooves.

[0010] Preferably, the pushing assembly includes a base plate, and the base plate is fixedly connected to the lower end of the auxiliary mold block, the base plate is located inside the groove, a spring is fixedly connected to the lower surface of the base plate, and the lower end of the spring is fixedly connected to the inner wall of the groove, and a limiting mechanism is provided on one side of the base plate.

[0011] Preferably, the limiting mechanism comprises a limiting groove, and the limiting groove is internally slidably connected to a limiting rod, the lower end of the limiting rod is fixedly connected to a transverse plate, and the transverse plate is fixedly connected to the inner wall of the groove.

[0012] Preferably, a cooling rack is fixedly connected to the front side surface of the mold base, and a water tank is fixedly connected to the upper end of the cooling rack, a nozzle is fixedly connected to the lower surface of the water tank, and a water supply pipe is fixedly connected to the upper surface of the water tank.

[0013] A strip forming process for pipeline repair, the specific steps are as follows: Step 1: When processing the initial repair strip profile, the staff first rotates the screw in the adjustment mechanism in the positive direction, so that the screw will drive the sliders to move closer to each other, and then the sliders drive the main mold blocks to move closer to each other. When the main mold blocks are fitted together, the staff fixes the symmetrically arranged main mold blocks together through the connecting pins and the main connecting grooves on the inner surfaces of the main mold blocks; Step 2: Then the staff connects the main mold block to the extruder through the connecting pipe on the rear surface of the main mold block, and then puts the PVC material into the extrusion barrel through the feed port, and starts the motor at one end of the extrusion barrel. At this time, the motor drives the auger inside the extrusion barrel to transport the PVC material and heat the PVC material. Then the heated and melted PVC material enters the inner cavity, and the heating pipe inside the inner cavity further heats the PVC material. When the PVC material fills the inner cavity, it will be discharged from the inside of the forming hole, so that the initial repair strip is formed; Step 3: After the repair strip is extruded from the forming hole, the staff will then transport water to the inside of the water tank through the water supply pipe. The water inside the water tank will be sprayed onto the repair strip extruded from the forming hole through the nozzle, thereby cooling and shaping the repair strip, and preventing the repair strip just extruded from the forming hole from deforming after touching something. Step 4: When the initial repair strip needs to be changed, the staff first rotates the screw in the adjustment mechanism in the reverse direction. At this time, the screw will drive the main mold block to move relatively away. When the spacing of the symmetrically arranged main mold blocks is greater than the length of the auxiliary mold block inside the groove, the auxiliary mold block will rise due to the elastic force of the spring in the push-up assembly. When it rises to a certain height, the staff will slightly manually adjust the auxiliary mold block to align with the main mold block, and then the staff will rotate the screw in the adjustment mechanism in the forward direction. At this time, the main mold block will clamp the auxiliary mold block, and then the staff will connect the auxiliary mold block and the main mold block together through two sets of connecting pins, and then repeat the contents of steps 2 and 3, so that a new repair strip can be processed and formed.

[0014] The present invention provides a strip forming die for pipeline repair. Compared with the prior art, it has the following beneficial effects: 1. The auxiliary mold block inside the groove and the through hole opened inside the auxiliary mold block, the auxiliary molding hole cooperate with the push-up component at the lower end of the auxiliary mold block and the slider and screw in the adjustment mechanism, thereby solving the problem that traditional molding molds are fixed and cannot be changed, and avoiding the need to develop corresponding molding molds for producing a repair strip, thereby reducing the cost of producing the repair strip, reducing the trouble of the staff, and improving the flexibility of the use of the molding mold.

[0015] 2. Secondly, the limiting groove on the rear side surface of the bottom plate fixedly connected to the lower surface of the auxiliary mold block and the limiting rod inside the limiting groove cooperate with the cross plate at the lower end of the limiting rod, and can limit the auxiliary mold block, thereby improving the stability of the auxiliary mold block, and improving the splicing accuracy between the auxiliary mold block and the main mold block, while further improving the production quality of the repair strip.

[0016] 3. The formed holes installed inside the inner cavity can facilitate further heating of the melted PVC material, and prevent the PVC material inside the inner cavity from cooling and solidifying inside the inner cavity, making it inconvenient for the staff to clean the inner cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a side view structural schematic diagram of the present invention; Figure 3is a schematic diagram of the internal structure of the groove in the present invention; Figure 4 for Figure 3 A side view structural schematic diagram of; Figure 5 It is a schematic diagram of the cross-sectional structure of the main mold block in the present invention.

[0018] In the figure: 1. mold base; 2. groove; 3. positioning plate; 4. auxiliary mold block; 401. auxiliary connecting groove; 402. through hole; 403. bottom plate; 404. spring; 405. auxiliary forming hole; 406. limit groove; 407. limit rod; 408. cross plate; 5. cooling rack; 501. nozzle; 502. water tank; 503. water supply pipe; 6. connecting pin; 7. extruder; 8. main mold block; 801. inner cavity; 8011. heating tube; 8012. feed hole; 802. forming hole; 803. main connecting groove; 9. slide groove; 901. slider; 902. screw; 10. connecting pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-5 The present invention provides a technical solution: a strip forming mold for pipeline repair, comprising a mold base 1, a slide groove 9 is provided on the inner upper surface of the mold base 1, and a main mold block 8 is symmetrically connected to the inner surface of the slide groove 9 through an adjustment mechanism, a molding hole 802 is provided on one side surface of the main mold block 8, and an inner cavity 801 is provided inside the main mold block 8, and the inner cavity 801 and the molding hole 802 are connected, a groove 2 is provided inside the mold base 1, and the groove 2 is located at the front side of the slide groove 9, and a sub-mold block is provided inside the groove 2 4, and a through hole 402 is opened inside the auxiliary mold block 4, the through hole 402 corresponds to the inner cavity 801, and an auxiliary molding hole 405 is opened on the front side surface of the auxiliary mold block 4, a push-up assembly is provided at the lower end of the auxiliary mold block 4, a heating tube 8011 is fixedly connected to the inner wall of the inner cavity 801, and a feed hole 8012 is provided on one side of the heating tube 8011, a connecting tube 10 is provided at one end of the feed hole 8012, and one end of the connecting tube 10 is fixedly connected to the outer surface of the main mold block 8, and the other end of the connecting tube 10 is fixedly connected to the extruder 7.

[0021] As a technical optimization solution of the present invention, the extruder 7 includes an extrusion cylinder, and the side surface of one end of the extrusion cylinder is fixedly connected to the feed port, a motor is fixedly installed at one end of the extrusion cylinder, and one end of the motor passes through the extrusion cylinder and is connected to an auger, so as to facilitate the heating and transportation of the PVC material to the interior of the inner cavity 801, and the interior of the extrusion cavity 801 is formed through the forming hole 802, thereby forming a corresponding repair tape.

[0022] As a technical optimization solution of the present invention, the adjustment mechanism includes a positioning plate 3, and the internal rotation of the positioning plate 3 is connected to a screw 902, the side surface of the screw 902 is threadedly connected to a slider 901, and the upper surface of the slider 901 is fixedly connected to the lower surface of the main mold block 8. The main mold block 8 can be separated by rotating the screw 902, thereby facilitating the installation of the auxiliary mold block 4 and forming a new repair strip.

[0023] As a technical optimization solution of the present invention, the inner surface of the main mold block 8 is provided with a main connecting groove 803, and the rear side of the main mold block 8 is provided with a connecting pin 6 corresponding to the main connecting groove 803. The main mold blocks 8 can be connected together through the connecting pin 6 and the main connecting groove 803, thereby improving the connection tightness of the main mold blocks 8 and preventing the softened PVC material after heating from flowing out from the gap between the main mold blocks 8.

[0024] As a technical optimization solution of the present invention, both side surfaces of the auxiliary mold block 4 are provided with auxiliary connecting grooves 401, and the auxiliary connecting grooves 401 correspond to the main connecting grooves 803. When the auxiliary mold block 4 is installed, the two side surfaces of the auxiliary mold block 4 can be tightly connected with the inner surface of the main mold block 8 through the connecting pin 6, so that the auxiliary mold block 4 and the main mold block 8 are tightly connected together, and the PVC material softened after heating is prevented from flowing out of the gap between the auxiliary mold block 4 and the main mold block 8.

[0025] As a technical optimization scheme of the present invention, the pushing-up assembly includes a base plate 403, and the base plate 403 is fixedly connected to the lower end of the auxiliary mold block 4, the base plate 403 is located inside the groove 2, and a spring 404 is fixedly connected to the lower surface of the base plate 403, and the lower end of the spring 404 is fixedly connected to the inner wall of the groove 2, and a limiting mechanism is provided on one side of the base plate 403, so that when the main mold block 8 is separated by a length greater than the length of the groove 2, the spring 404 will push the auxiliary mold block 4 out of the groove 2 through the base plate 403, and at the same time align the auxiliary mold block 4 with the main mold block 8, thereby facilitating the staff to install the auxiliary mold block 4.

[0026] As a technical optimization solution of the present invention, the limiting mechanism includes a limiting groove 406, and the limiting groove 406 is internally slidably connected to a limiting rod 407, the lower end of the limiting rod 407 is fixedly connected to a cross plate 408, and the cross plate 408 is fixedly connected to the inner wall of the groove 2, which can limit the bottom plate 403 and improve the stability of the bottom plate 403 and the auxiliary mold block 4 when they are rising, thereby making it convenient for subsequent staff to connect the auxiliary mold block 4 and the main mold block 8.

[0027] As a technical optimization scheme of the present invention, the front side surface of the mold base 1 is fixedly connected to a cooling rack 5, and the upper end of the cooling rack 5 is fixedly connected to a water tank 502, the lower surface of the water tank 502 is fixedly connected to a nozzle 501, and the upper surface of the water tank 502 is fixedly connected to a water supply pipe 503. The extruded repair strip profile can be cooled by the water tank 502 and the nozzle 501, and the subsequent winding of the repair strip profile is convenient.

[0028] A strip forming process for pipeline repair, the specific steps are as follows: Step 1: When processing the initial repair strip profile, the staff first rotates the screw 902 in the adjustment mechanism in the positive direction, so that the screw 902 will drive the sliders 901 to approach each other, and the sliders 901 drive the main mold blocks 8 to be relatively close. When the main mold blocks 8 are fitted together, the staff fixes the symmetrically arranged main mold blocks 8 together through the connecting pins 6 and the main connecting grooves 803 on the inner surfaces of the main mold blocks 8; Step 2: Then the staff connects the main mold block 8 with the extruder 7 through the connecting pipe 10 on the rear surface of the main mold block 8, and then puts the PVC material into the extrusion cylinder through the feed port, and starts the motor at one end of the extrusion cylinder. At this time, the motor drives the auger inside the extrusion cylinder to transport the PVC material and heat the PVC material. Then the heated and melted PVC material enters the inner cavity 801, and the heating pipe 8011 inside the inner cavity 801 further heats the PVC material. When the PVC material fills the inner cavity 801, it will be discharged from the inside of the forming hole 802, so that the initial repair tape is formed; Step 3: After the repair tape is extruded from the forming hole 802, the staff will then transport water to the inside of the water tank 502 through the water supply pipe 503, so that the water inside the water tank 502 will be sprayed onto the repair tape extruded from the forming hole 802 through the nozzle 501, thereby cooling and shaping the repair tape, and preventing the repair tape just extruded from the forming hole 802 from deforming after touching something; Step 4: When the initial repair strip needs to be changed, the staff first rotates the screw 902 in the adjustment mechanism in the reverse direction. At this time, the screw 902 will drive the main mold block 8 to move relatively away. When the spacing of the symmetrically arranged main mold blocks 8 is greater than the length of the auxiliary mold block 4 inside the groove 2, the auxiliary mold block 4 will be lifted by the elastic force of the spring 404 in the push-up assembly. After rising to a certain height, the staff will manually adjust the auxiliary mold block 4 slightly to align it with the main mold block 8, and then the staff will rotate the screw 902 in the adjustment mechanism in the forward direction. At this time, the main mold block 8 will clamp the auxiliary mold block 4, and then the staff will connect the auxiliary mold block 4 and the main mold block 8 together through two sets of connecting pins 6, and then repeat the contents of steps 2 and 3, so that a new repair strip can be processed and formed.

[0029] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A strip forming die for pipeline repair, comprising a die base (1), characterized in that: The upper surface of the interior of the mold base (1) is provided with a slide groove (9), and the interior of the slide groove (9) is connected to a symmetrically arranged main mold block (8) through an adjustment mechanism, a molding hole (802) is provided on one side surface of the main mold block (8), and an inner cavity (801) is provided inside the main mold block (8), and the inner cavity (801) and the molding hole (802) are connected, and a groove (2) is provided inside the mold base (1), and the groove (2) is located at the front side of the slide groove (9), and a sub-mold block (4) is provided inside the groove (2), and a through hole ( 402), the through hole (402) corresponds to the inner cavity (801), and the front surface of the auxiliary mold block (4) is provided with an auxiliary molding hole (405), the lower end of the auxiliary mold block (4) is provided with a push-up assembly, the inner wall of the inner cavity (801) is fixedly connected to a heating tube (8011), and one side of the heating tube (8011) is provided with a feeding hole (8012), one end of the feeding hole (8012) is provided with a connecting tube (10), and one end of the connecting tube (10) is fixedly connected to the outer surface of the main mold block (8), and the other end of the connecting tube (10) is fixedly connected to an extruder (7).

2. The strip forming die for pipeline repair according to claim 1, characterized in that: The extruder (7) comprises an extrusion cylinder, and one end side surface of the extrusion cylinder is fixedly connected to a feed port, one end of the extrusion cylinder is fixedly mounted with a motor, and one end of the motor passes through the extrusion cylinder and is connected to an auger.

3. A strip forming die for pipeline repair according to claim 2, characterized in that: The adjustment mechanism comprises a positioning plate (3), and a screw rod (902) is rotatably connected inside the positioning plate (3), a slider (901) is threadedly connected to the side surface of the screw rod (902), and the upper surface of the slider (901) is fixedly connected to the lower surface of the main mold block (8).

4. The strip forming die for pipeline repair according to claim 3, characterized in that: The inner surface of the main mold block (8) is provided with a main connection groove (803), and a connection pin (6) is provided on the rear side of the main mold block (8) corresponding to the main connection groove (803).

5. The strip forming die for pipeline repair according to claim 4, characterized in that: Auxiliary connection grooves (401) are provided on both side surfaces of the auxiliary mold block (4), and the auxiliary connection grooves (401) correspond to the main connection grooves (803).

6. The strip forming die for pipeline repair according to claim 5, characterized in that: The push-up assembly comprises a bottom plate (403), and the bottom plate (403) is fixedly connected to the lower end of the auxiliary mold block (4), the bottom plate (403) is located inside the groove (2), a spring (404) is fixedly connected to the lower surface of the bottom plate (403), and the lower end of the spring (404) is fixedly connected to the inner wall of the groove (2), and a limiting mechanism is provided on one side of the bottom plate (403).

7. The strip forming die for pipeline repair according to claim 6, characterized in that: The limiting mechanism comprises a limiting groove (406), and the limiting groove (406) is slidably connected to a limiting rod (407) inside, the lower end of the limiting rod (407) is fixedly connected to a transverse plate (408), and the transverse plate (408) is fixedly connected to the inner wall of the groove (2).

8. The strip forming die for pipeline repair according to claim 7, characterized in that: A cooling rack (5) is fixedly connected to the front surface of the mold base (1), and a water tank (502) is fixedly connected to the upper end of the cooling rack (5); a nozzle (501) is fixedly connected to the lower surface of the water tank (502), and a water supply pipe (503) is fixedly connected to the upper surface of the water tank (502).

9. The forming process of the strip forming die for pipeline repair according to claim 8, characterized in that: The specific steps are as follows: Step 1: When processing the initial repair strip profile, the staff first rotates the screw (902) in the adjustment mechanism in the positive direction, so that the screw (902) will drive the sliders (901) to move closer to each other, and then the sliders (901) drive the main mold blocks (8) to move closer to each other. When the main mold blocks (8) are fitted together, the staff fixes the symmetrically arranged main mold blocks (8) together through the connecting pins (6) and the main connecting grooves (803) on the inner surfaces of the main mold blocks (8); Step 2: The staff then connects the main mold block (8) to the extruder (7) through the connecting pipe (10) on the rear surface, and then puts the PVC material into the extrusion barrel through the feed port, and starts the motor at one end of the extrusion barrel. At this time, the motor drives the auger inside the extrusion barrel to transport the PVC material and heat the PVC material. The heated and melted PVC material then enters the inner cavity (801). At the same time, the heating pipe (8011) inside the inner cavity (801) further heats the PVC material. When the PVC material fills the inner cavity (801), it will be discharged from the inside of the forming hole (802), thereby forming the initial repair strip; Step 3: After the repair strip is extruded from the forming hole (802), the staff then delivers water to the inside of the water tank (502) through the water supply pipe (503), so that the water inside the water tank (502) is sprayed onto the repair strip extruded from the forming hole (802) through the nozzle (501), thereby cooling and shaping the repair strip, thereby preventing the repair strip just extruded from the forming hole (802) from deforming after touching something; Step 4: When the initial repair strip needs to be changed, the staff first rotates the screw (902) in the adjustment mechanism in the reverse direction. At this time, the screw (902) will drive the main mold block (8) to move relatively away. When the spacing of the symmetrically arranged main mold blocks (8) is greater than the length of the auxiliary mold block (4) inside the groove (2), the auxiliary mold block (4) will be lifted by the elastic force of the spring (404) in the lifting assembly. After rising to a certain height, the staff will slightly manually adjust the auxiliary mold block (4) to align with the main mold block (8). Then the staff rotates the screw (902) in the adjustment mechanism in the forward direction. At this time, the main mold block (8) will clamp the auxiliary mold block (4). Then the staff connects the auxiliary mold block (4) and the main mold block (8) together through two sets of connecting pins (6). Then, the contents of steps 2 and 3 are repeated, so that a new repair strip can be processed and formed.

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