Hydraulic double seal large pipe diameter polyurethane foaming pouring foaming platform

Abstract

The hydraulic double-sealing large-pipe-diameter polyurethane foaming pouring and foaming platform relates to the technical field of thermal insulation pipe manufacturing, and particularly relates to a double-sealing structure suitable for the foaming pouring platform of a large-pipe-diameter polyurethane thermal insulation pipe and cantilever and clamping structures thereof. The hydraulic double-sealing large-pipe-diameter polyurethane foaming pouring and foaming platform comprises a platform frame body and a clamping device. The middle part of the platform frame body is provided with two sets of clamping devices. The hydraulic double-sealing large-pipe-diameter polyurethane foaming pouring and foaming platform further comprises a double-sealing structure and a cantilever structure. The cantilever structure is used for lifting the steel pipe in the polyurethane thermal insulation pipe. The double-sealing structure is used for plugging the end of the polyurethane thermal insulation pipe to prevent leakage from the end when pouring and foaming the material. Each set of clamping device is provided with a set of transmission structure. The technical scheme of the hydraulic double-sealing large-pipe-diameter polyurethane foaming pouring and foaming platform solves the problems of poor sealing, partial foaming, insufficient clamping power, and no technical protection of the output motor in the prior art.

Description

Technical Field

[0001] This invention relates to a hydraulic double-sealed large-diameter polyurethane foam injection platform, which belongs to the field of insulation pipe manufacturing technology, and particularly to a double-sealed structure and its cantilever and clamping structure suitable for large-diameter polyurethane insulation pipe foam injection platforms. Background Technology

[0002] Currently, existing large-diameter polyurethane foam injection platforms use a single-head device, which is a single-seal structure. This structure has the defect of incomplete sealing, leading to material leakage between the steel pipe and the head. This results in the foam density at the end being lower than the national standard requirements, and the produced products are frequently substandard. Furthermore, existing large-diameter polyurethane foam injection platforms lack a cantilever mechanism; all the lifting weight of the steel pipe is applied to the head, which prevents the head from being concentric with the working pipe, causing problems such as foam misalignment. The existing large-diameter polyurethane foam injection platform's clamping power output device uses a direct-drive motor structure. This cannot meet the power requirements of ultra-large diameter polyurethane foam clamping; excessive torque can cause the drive shaft to break, and the lack of a motor protection device may lead to single-machine burnout.

[0003] In view of the problems existing in the above-mentioned existing technologies, it is necessary to study and design a new type of hydraulic double-seal large-diameter polyurethane foam injection platform to overcome the problems existing in the existing technologies. Summary of the Invention

[0004] To address the technical problems of poor sealing, bubble formation, insufficient clamping power, and lack of technical protection for the output motor in existing technologies, this invention provides a hydraulic double-sealed large-diameter polyurethane foam injection platform. This invention primarily utilizes a double-sealed end cap structure, a cantilever mechanism, and an independent power output shaft seat to achieve better sealing of the insulation pipe gaps, resolve bubble formation issues, increase power output potential, and protect the power motor.

[0005] The technical means employed in this invention are as follows:

[0006] A hydraulic double-seal large-diameter polyurethane foam injection platform includes: a platform frame and a clamping device; two sets of clamping devices are provided in the middle of the platform frame.

[0007] Furthermore, the hydraulic double-sealed large-diameter polyurethane foam injection platform also includes: a double-sealed structure and a cantilever structure.

[0008] Furthermore, the cantilever structure is used to lift the steel pipe inside the polyurethane insulation pipe;

[0009] Furthermore, the double sealing structure is used to seal the ends of the polyurethane insulation pipe to prevent leakage from the ends when the foaming material is poured in.

[0010] Furthermore, the double-sealing structure consists of two sets, symmetrically arranged on the guide rails at both ends of the platform frame, including: a main sealing clamping trolley, a main hydraulic cylinder, an auxiliary hydraulic cylinder, a main sealing steel ring, and an auxiliary sealing clamping trolley. The main sealing clamping trolley is mounted on the guide rail at the end of the platform frame via guide wheels, and its rear end is hinged to the cylinder rod end of the main hydraulic cylinder mounted on the upright at the end of the platform frame, and moves forward / backward along the guide rail under the action of the main hydraulic cylinder. The main sealing steel ring is bolted to the front end of the main sealing clamping trolley. The auxiliary sealing clamping trolley is mounted on the rail on the main sealing clamping trolley via wheels, and its rear end is hinged to the cylinder rod end of the auxiliary hydraulic cylinder mounted on the upright at the end of the platform frame, and moves forward / backward along the rail under the action of the auxiliary hydraulic cylinder. A cross-shaped frame is fixedly mounted on the front end of the auxiliary sealing clamping trolley. The auxiliary sealing steel ring is mounted on the cross-shaped frame, and a sealing rubber ring is fitted on the front end face of the auxiliary sealing steel ring. The auxiliary sealing steel ring cooperates with the main sealing steel ring to implement double sealing for large-diameter polyurethane foam injection.

[0011] Furthermore, there are two sets of cantilever structures, which are respectively set inside the main sealing clamping vehicle of the two sets of double sealing structures, including: a cantilever cylinder and a cantilever rod; the cylinder body of the cantilever cylinder is vertically fixed on the main sealing clamping vehicle, and the top of its cylinder rod is hinged to the middle of the cantilever rod; the tail end of the cantilever rod is hinged to the rear wall of the main sealing clamping vehicle; the front end of the cantilever rod passes through the cross frame, and a cantilever pulley is provided at its end;

[0012] Furthermore, the clamping device includes: an upper frame, a lower frame, and an opening / closing cylinder; the upper frame and the lower frame have a semi-circular arc structure in cross-section, and are combined into a whole; the lower frame is fixed to the platform frame, and one end of the upper frame is hinged to one end of the lower frame; the opening / closing cylinder is hinged to the ground foundation on one side of the hinge end, and the front end of its cylinder rod is connected to the upper frame; the extension and retraction of the cylinder rod drives the opening and closing of the upper frame.

[0013] Furthermore, each clamping device is equipped with a transmission structure, and the two transmission mechanisms are connected to the output ends of the power unit mounted at the bottom of the platform frame. Each transmission mechanism includes a short transmission structure and a long transmission structure. The short transmission structure is connected to the input ends of each clamping and lifting mechanism mounted on the lower frame opening section of the clamping device, and the bottom input end of the short transmission structure is connected to the output end of the power unit, transmitting power to the connected clamping and lifting mechanism and driving it. The long transmission structure is connected to the input ends of the lower frame hinge section and the upper frame mounting of each clamping and lifting mechanism, and the bottom input end of the long transmission structure is connected to the output end of the power unit.

[0014] The output end of the power device is connected to transmit power to the clamping and lifting mechanism connected to it, which is responsible for driving the five clamping and lifting mechanisms; the long transmission structure and the short transmission structure work together to drive each clamping and lifting mechanism.

[0015] The components work together to tighten / untie the insulation pipe.

[0016] Furthermore, each arm of the rice frame is equipped with a radial guide groove for assembling auxiliary sealing steel rings.

[0017] Furthermore, the auxiliary sealing steel ring is a replaceable structure;

[0018] Furthermore, the rear end face of the auxiliary sealing steel ring is provided with a connection that corresponds to and mates with the guide groove.

[0019] The guide post, along with bolts, guides the auxiliary sealing steel ring onto the frame.

[0020] Furthermore, the outer diameter of the sealing ring is consistent with the inner diameter of the main sealing steel ring, working together to achieve a double seal for the large-diameter polyurethane foam injection.

[0021] Furthermore, the short transmission structure includes: a driven sprocket, an adjusting wheel, and a transmission chain; 5 Furthermore, the driven sprocket is mounted on the input end of the clamping and lifting mechanism;

[0022] Furthermore, the adjusting wheel is mounted on the outside between two adjacent driven sprockets to adjust the tension of the drive chain;

[0023] Furthermore, the driven sprocket is connected to the adjacent adjusting sprocket via a transmission chain, and the driven sprocket at the bottom is connected to the driving sprocket of the power unit.

[0024] 0. Further, the long transmission structure includes: a driven sprocket, an adjusting wheel, and a transmission chain;

[0025] Furthermore, the driven sprocket is mounted on the input end of the clamping and lifting mechanism;

[0026] Furthermore, the adjusting wheel is mounted on the outside between two adjacent driven sprockets to adjust the tension of the drive chain;

[0027] Furthermore, the driven sprocket is connected to the adjacent adjusting wheel via a transmission chain, and the driven sprocket at the lowest end 5 is connected to the driving sprocket of the power unit.

[0028] Furthermore, the power unit includes: a drive motor, a drive sprocket, a main shaft, and a transmission shaft;

[0029] Furthermore, the main shaft is mounted on the bottom of the platform frame via a bearing housing; both ends of the main shaft are connected to one end of the drive shaft via universal joint structures.

[0030] Furthermore, the other end of the drive shaft is equipped with a drive sprocket and a pulley;

[0031] 0 Furthermore, the drive motor is fixedly mounted on the bottom of the platform frame, and its output end is equipped with a pulley that is connected to the belt on the drive shaft through a transmission belt to transmit power;

[0032] Furthermore, the drive sprocket is connected to the transmission chains of both the short and long transmission structures.

[0033] The working process of this invention is as follows:

[0034] 1. The opening and closing cylinders drive the upper frame to open to its maximum extent;

[0035] 2. The drive motor drives the main shaft mounted on the transmission shaft and the transmission shaft connected to the other end of the main shaft to rotate through the pulley and belt mounted on it; the transmission shafts at both ends drive the drive sprocket mounted on them to rotate, and the drive coupling drives the adjusting wheel mounted on the upper frame and the lower frame and the driven sprocket mounted on the input end of the clamping and lifting mechanism to rotate in sequence through the transmission chain. The driven sprocket rotates to drive the clamping and lifting mechanism to loosen to the maximum extent;

[0036] 3. The hoisting device hoists the insulation pipe into the clamping device, which is located on the lower frame. The opening and closing cylinder is activated to close the upper frame and clamp the insulation pipe into the clamping device.

[0037] 4. Reverse start the drive motor to drive the clamping lifting mechanism to clamp the high-density polyethylene outer protective tube of the insulation pipe.

[0038] 5. Using the control handle, first insert the cantilever mechanism into the inner wall of the working steel pipe. After reaching the appropriate position, pressurize the cantilever cylinder to lift the combination of the working steel pipe and the high-density polyethylene outer protective pipe to the same height as the inner diameter of the main sealing steel ring.

[0039] 6. Using the operating handle, continue pressurizing the main hydraulic cylinder to pass the inner diameter of the main sealing steel ring through the outer diameter of the working steel pipe. Simultaneously, ensure the sealing surface of the main sealing steel ring is tightly fitted against the end face of the high-density polyethylene outer protective tube, forming the first layer of sealing structure, i.e., sealing the gap between the outer diameter of the working steel pipe and the inner diameter of the high-density polyethylene outer protective tube. Install the sealing ring on the end face of the auxiliary sealing clamping carriage facing the working steel pipe, positioned on the outer wall of the working steel pipe, with the diameter of the sealing ring larger than the gap between the inner diameter of the main sealing steel ring and the outer diameter of the working steel pipe. Using the operating handle, pressurize the auxiliary hydraulic cylinder to move the auxiliary sealing clamping carriage forward. This causes the inner diameter of the auxiliary sealing clamping carriage to pass through the outer diameter of the working steel pipe and move forward, squeezing and tightening the sealing ring to seal the gap between the outer diameter of the working steel pipe and the inner diameter of the main sealing steel ring, forming the second layer of sealing structure.

[0040] Compared with the prior art, the present invention has the following advantages:

[0041] 1. The hydraulic double-seal large-diameter polyurethane foam injection platform provided by this invention replaces the conventional equipment that uses an external protective sealing mold to suspend the working steel pipe with a trolley-type cantilever mechanism. On the one hand, it solves the problem that the external protective mold of the original structure causes the ejector cylinder to bear a large radial force, affecting the service life of the ejector cylinder and the suspension stability. On the other hand, by using the principle of repeated positioning, the end cap position is kept in a concentric state with the clamping mechanism. Even if the end cap model is changed, there is no need to disassemble and adjust the clamping transmission system. Compared with conventional equipment, this design has the advantages of greatly saving the time of adjusting the equipment when changing models and improving work efficiency. On the other hand, it keeps the pipeline production center in the center of the equipment, reducing the wear of the clamping mechanism and effectively reducing the equipment failure rate.

[0042] 2. The hydraulic double-seal large-diameter polyurethane foam injection platform provided by this invention incorporates a rubber ring, a rubber ring top ring, a top ring cylinder, a guide rail, and guide wheels into the end-tightening mechanism, forming a double-seal structure together with the sealing steel pipe. This structure solves the sealing problem between the sealing head and the steel pipe. The main advantages are:

[0043] (1) Solved the problem of material splashing caused by the expansion of internal pressure due to the polyurethane chain reaction;

[0044] (2) It solved the problem of wasted time cleaning steel pipes due to material splashing and contamination;

[0045] (3) By solving the problem of material splashing, the design injection density can be effectively reduced, thereby effectively saving polyurethane raw materials;

[0046] 3. The hydraulic double-seal large-diameter polyurethane foam injection platform provided by this invention has a clamping transmission mechanism composed of a drive motor, a drive sprocket, a universal joint, a drive shaft, and a transmission shaft. Compared with ordinary equipment, it adds a clamping output shaft and a bearing seat structure, and decomposes the output structure into a bidirectional sprocket drive. The advantages of this design are mainly:

[0047] (1) The motor-driven drive shaft is subjected to a large torque. In ordinary equipment, the motor is directly connected to the elevator turbine shaft, which can easily damage the elevator turbine shaft. Making the drive shaft independent can solve this problem.

[0048] (2) The insulation pipes to be produced by this equipment have a large diameter and require a relatively large clamping force. Therefore, the load on the sprockets and chains is also relatively large. This case decomposes the drive into a two-sided sprocket and chain drive form, and decomposes the required tension, which can effectively reduce the tension that the chain needs to bear, thereby reducing the chain design size and improving the chain service life.

[0049] (3) By using universal joints and drive shafts to connect the front and rear clamps, the synchronization of the front and rear clamps can be effectively maintained, and the universal joints can effectively reduce the starting shock.

[0050] (4) The motor output end uses a belt connection instead of a sprocket connection, which can avoid excessive clamping force caused by misoperation and damage to the motor.

[0051] In summary, the technical solution of this invention solves the problems of poor sealing, bubble formation, insufficient clamping power, and lack of technical protection for the output motor in the prior art. Attached Figure Description

[0052] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0053] Figure 1 This is a schematic diagram of the structure of the present invention;

[0054] Figure 2 This is a schematic diagram of the double sealing structure and cantilever structure of the present invention;

[0055] Figure 3 For the present invention Figure 2 Side view;

[0056] Figure 4 This is a schematic diagram of the clamping device of the present invention in the open state.

[0057] Figure 5 This is a schematic diagram of the closed state structure of the clamping device of the present invention;

[0058] Figure 6 This is a partial cross-sectional view of the present invention.

[0059] In the diagram: 1. Platform frame; 2. Guide rail; 3. Main sealing clamping trolley; 4. Main hydraulic cylinder; 5. Auxiliary hydraulic cylinder; 6. Main sealing steel ring; 7. Auxiliary sealing clamping trolley; 8. Guide wheel; 9. End support frame; 10. Wheel; 11. Track; 12. Mesh frame; 13. Auxiliary sealing steel ring; 14. Sealing rubber ring; 15. Cantilever cylinder; 16. Cantilever rod; 17. Cantilever pulley; 18. Lower frame opening section; 19. Clamping and lifting mechanism; 20. Lower frame hinge section; 21. Upper frame; 22. Guide slide groove; 23. Driven sprocket; 24. Adjusting wheel; 25. Transmission chain; 26. Drive sprocket; 27. Drive motor; 28. Main shaft; 29. ​​Transmission shaft; 30. Pulley; 31. Lower frame; 31. Opening and closing cylinder. Detailed Implementation

[0060] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0061] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0062] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0063] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0064] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0065] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0066] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0067] like Figure 1-6 As shown, the present invention provides a hydraulic double-sealed large-diameter polyurethane foam injection platform, comprising: a platform frame 1 and clamping devices; two sets of clamping devices are provided in the middle of the platform frame 1; the hydraulic double-sealed large-diameter polyurethane foam injection platform further comprises: a double-sealing structure and a cantilever structure; the cantilever structure is used to lift the steel pipe inside the polyurethane insulation pipe; the double-sealing structure is used to seal the end of the polyurethane insulation pipe to prevent leakage from the end during foaming material injection;

[0068] like Figure 1-3As shown, the double sealing structure consists of two sets, symmetrically arranged on the guide rails 2 at both ends of the platform frame 1, including: a main sealing clamping carriage 3, a main hydraulic cylinder 4, an auxiliary hydraulic cylinder 5, a main sealing steel ring 6, and an auxiliary sealing clamping carriage 7; the main sealing clamping carriage 3 is mounted on the guide rail 2 at the end of the platform frame 1 via guide wheels 8, and its rear end is hinged to the cylinder rod end of the main hydraulic cylinder 4 mounted on the upright frame 9 at the end of the platform frame 1, and moves forward / backward along the guide rail 2 under the action of the main hydraulic cylinder 4; the main sealing steel ring 6 is bolted to the front end of the main sealing clamping carriage 3; the auxiliary sealing clamping carriage 7... The tensioning car 7 is mounted on the track 11 of the main sealing tensioning car via wheels 10. Its rear end is hinged to the end of the cylinder rod of the auxiliary oil cylinder 5 mounted on the end frame 9 of the platform frame 1, and moves forward / backward along the track 11 under the action of the auxiliary oil cylinder 5. The front end of the auxiliary sealing tensioning car 7 is fixedly equipped with a cross frame 12. The auxiliary sealing steel ring 13 is mounted on the cross frame 12, and a sealing rubber ring 14 is assembled on the front end face of the auxiliary sealing steel ring 13. The auxiliary sealing steel ring 13 cooperates with the main sealing steel ring 6 to implement double sealing for the large-diameter polyurethane foam injection.

[0069] like Figure 1-3 As shown, there are two sets of cantilever structures, which are respectively set inside the main sealing clamping vehicle 3 of the two sets of double sealing structures. They include: a cantilever cylinder 15 and a cantilever rod 16; the cylinder body of the cantilever cylinder 15 is vertically fixed on the main sealing clamping vehicle 3, and the top of its cylinder rod is hinged to the middle of the cantilever rod 16; the tail end of the cantilever rod 16 is hinged to the rear wall of the main sealing clamping vehicle 3; the front end of the cantilever rod 16 passes through the cross frame 12, and its end is provided with a cantilever pulley 17;

[0070] like Figure 4 , 5 As shown, the clamping device includes: an upper frame 21, a lower frame 31, and an opening / closing cylinder 32; the upper frame 21 and the lower frame 31 have a semi-circular arc structure in cross-section and are combined into a whole. The lower frame 31 is fixed on the platform frame 1, and one end of the upper frame 21 is hinged to one end of the lower frame 31; the opening / closing cylinder 32 is fixedly hinged to the ground foundation on one side of the hinge end, and the front end of its cylinder rod is connected to the upper frame 21. The extension and retraction of the cylinder rod drives the opening and closing of the upper frame 21.

[0071] like Figure 1 , 4As shown in Figure 6, each clamping device is equipped with a transmission structure. The two transmission mechanisms are connected to the output ends of the power unit at both ends mounted at the bottom of the platform frame 1. Each transmission mechanism includes a short transmission structure and a long transmission structure. The short transmission structure is connected to the input ends of each clamping and lifting mechanism 19 mounted on the lower frame opening section 18 of the clamping device. The bottom input end of the short transmission structure is connected to the output end of the power unit, transmitting power to the clamping and lifting mechanism 19 connected thereto, and is responsible for driving the clamping and lifting mechanism 19. The long transmission structure is connected to the input ends of each clamping and lifting mechanism 19 mounted on the lower frame hinge section 20 and the upper frame 21 of the clamping device. The bottom input end of the long transmission structure is connected to the output end of the power unit, transmitting power to the clamping and lifting mechanism 19 connected thereto, and is responsible for driving the clamping and lifting mechanism 19. The long transmission structure and the short transmission structure work together to drive each clamping and lifting mechanism 19 to move together, realizing the clamping / releasing of the insulation pipe.

[0072] like Figure 1-3 As shown, each arm of the rice frame 12 is provided with a radial guide groove 22 for assembling the auxiliary sealing steel ring 13.

[0073] like Figure 1-3 As shown, the auxiliary sealing steel ring 13 is a replaceable structure; the rear end face of the auxiliary sealing steel ring 13 is provided with a connecting guide post that corresponds to and cooperates with the guide groove 22. The auxiliary sealing steel ring 13 is installed on the mesh frame 12 by connecting the guide post and bolts cooperating with the guide groove 22.

[0074] like Figure 1-3 As shown, the outer diameter of the sealing ring 14 is consistent with the inner diameter of the main sealing steel ring 6, and together they provide a double seal for the large-diameter polyurethane foam injection.

[0075] like Figure 4 , 5 As shown, the short transmission structure includes: a driven sprocket 23, an adjusting wheel 24, and a transmission chain 25; the driven sprocket 23 is mounted on the input end of the clamping and lifting mechanism 19; the adjusting wheel 24 is mounted on the outer side between two adjacent driven sprockets 23 and is used to adjust the tension of the transmission chain 25; the driven sprocket 23 and the adjacent adjusting wheel 24 are connected through the transmission chain 25, and the driven sprocket 23 at the lowest end is connected to the driving sprocket 26 of the power unit.

[0076] like Figure 4 , 5As shown, the long transmission structure includes: a driven sprocket 23, an adjusting wheel 24, and a transmission chain 25; the driven sprocket 23 is mounted on the input end of the clamping and lifting mechanism 19; the adjusting wheel 24 is mounted on the outer side between two adjacent driven sprockets 23 and is used to adjust the tension of the transmission chain 25; the driven sprocket 23 and the adjacent adjusting wheel 24 are connected through the transmission chain 25, and the driven sprocket 23 at the lowest end is connected to the driving sprocket 26 of the power unit.

[0077] like Figure 4-6 As shown, the power unit includes: a drive motor 27, a drive sprocket 26, a main shaft 28, and a transmission shaft 29; the main shaft 28 is mounted on the bottom of the platform frame 1 via a bearing seat; both ends of the main shaft 28 are connected to one end of the transmission shaft 29 via universal joint structures; the other end of the transmission shaft 29 is equipped with a drive sprocket 26 and a pulley 30; the drive motor 27 is fixedly mounted on the bottom of the platform frame 1, and its output end is equipped with a pulley 30, which is connected to the belt on the transmission shaft 29 via a transmission belt to transmit power; the drive sprocket 26 is connected to the transmission chains 25 of the short transmission structure and the long transmission structure.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydraulic double-sealed large-diameter polyurethane foam injection platform, comprising: Platform frame (1), clamping device; two sets of clamping devices are provided in the middle of the platform frame (1); characterized in that: The hydraulic double-sealed large-diameter polyurethane foam injection platform also includes: a double-sealing structure and a cantilever structure. The cantilever structure is used to lift the steel pipe inside the polyurethane insulation pipe; The aforementioned double sealing structure is used to seal the ends of the polyurethane insulation pipe to prevent leakage from the ends when the foaming material is poured in. The aforementioned double sealing structure consists of two sets, symmetrically arranged on the guide rails (2) at both ends of the platform frame (1), including: a main sealing clamping carriage (3), a main oil cylinder (4), an auxiliary oil cylinder (5), a main sealing steel ring (6), and an auxiliary sealing clamping carriage (7); the main sealing clamping carriage (3) is mounted on the guide rail (2) at the end of the platform frame (1) via guide wheels (8), and its rear end is hinged to the cylinder rod end of the main oil cylinder (4) mounted on the upright frame (9) at the end of the platform frame (1), and moves forward / backward along the guide rail (2) under the action of the main oil cylinder (4); the main sealing steel ring (6) is bolted to the front end of the main sealing clamping carriage (3); the auxiliary sealing... The sealing and tightening vehicle (7) is mounted on the track (11) on the main sealing and tightening vehicle via wheels (10). Its rear end is hinged to the end of the cylinder rod of the auxiliary oil cylinder (5) mounted on the end frame (9) of the platform frame (1). Under the action of the auxiliary oil cylinder (5), it moves forward / backward along the track (11). The front end of the auxiliary sealing and tightening vehicle (7) is fixedly equipped with a mesh frame (12). The auxiliary sealing steel ring (13) is mounted on the mesh frame (12). The front end face of the auxiliary sealing steel ring (13) is equipped with a sealing rubber ring (14). The auxiliary sealing steel ring (13) and the main sealing steel ring (6) cooperate to implement double sealing for the large-diameter polyurethane foam injection. The cantilever structure consists of two sets, which are respectively installed inside the main sealing clamping vehicle (3) of the two sets of double sealing structures. The cantilever structure includes a cantilever cylinder (15) and a cantilever rod (16). The cylinder body of the cantilever cylinder (15) is vertically fixed on the main sealing clamping vehicle (3), and the top of its cylinder rod is hinged to the middle of the cantilever rod (16). The tail end of the cantilever rod (16) is hinged to the rear wall of the main sealing clamping vehicle (3). The front end of the cantilever rod (16) passes through the cross frame (12), and a cantilever pulley (17) is provided at its end. The clamping device includes: an upper frame (21), a lower frame (31), and an opening and closing cylinder (32); the upper frame (21) and the lower frame (31) have a semi-circular arc structure in cross section, and are combined into a whole. The lower frame (31) is fixed on the platform frame (1), and one end of the upper frame (21) is hinged to one end of the lower frame (31); the opening and closing cylinder (32) is fixedly hinged to the ground foundation on one side of the hinge end, and the front end of its cylinder rod is connected to the upper frame (21). The extension and retraction of the cylinder rod drives the opening and closing of the upper frame (21); Each clamping device is equipped with a transmission structure. The two transmission mechanisms are connected to the output ends of the power device at both ends of the platform frame (1). Each transmission mechanism includes a short transmission structure and a long transmission structure. The short transmission structure is connected to the input ends of each clamping lifting mechanism (19) mounted on the lower frame opening section (18) of the clamping device. The bottom input end of the short transmission structure is connected to the output end of the power device, transmitting power to the clamping lifting mechanism (19) connected thereto, and is responsible for driving the clamping lifting mechanism (19). The long transmission structure is connected to the input ends of each clamping lifting mechanism (19) mounted on the lower frame hinge section (20) and upper frame (21) of the clamping device. The bottom input end of the long transmission structure is connected to the output end of the power device, transmitting power to the clamping lifting mechanism (19) connected thereto, and is responsible for driving the clamping lifting mechanism (19). The long transmission structure and the short transmission structure work together to drive each clamping lifting mechanism (19) to move together, realizing the clamping / unclamping of the insulation pipe.

2. The hydraulic double-seal large-diameter polyurethane foam injection platform according to claim 1, characterized in that: Each arm of the aforementioned rice frame (12) is provided with a radial guide groove (22) for assembling an auxiliary sealing steel ring (13).

3. The hydraulic double-seal large-diameter polyurethane foam injection platform according to claim 2, characterized in that: The auxiliary sealing steel ring (13) is a replaceable structure; The auxiliary sealing steel ring (13) is provided with a connecting guide post on its rear end face that corresponds to the guide groove (22). The auxiliary sealing steel ring (13) is installed on the mesh frame (12) by connecting the guide post and bolts in conjunction with the guide groove (22).

4. The hydraulic double-seal large-diameter polyurethane foam injection platform according to claim 1, characterized in that: The outer diameter of the sealing ring (14) is consistent with the inner diameter of the main sealing steel ring (6), and together they work together to provide a double seal for the polyurethane foam injection of large-diameter pipes.

5. The hydraulic double-seal large-diameter polyurethane foam injection platform according to claim 1, characterized in that: The short transmission structure includes: a driven sprocket (23), an adjusting wheel (24), and a transmission chain (25); The driven sprocket (23) is mounted on the input end of the clamping lifting mechanism (19); The adjusting wheel (24) is mounted on the outside between two adjacent driven sprockets (23) and is used to adjust the tension of the transmission chain (25); The driven sprocket (23) is connected to the adjacent adjusting wheel (24) via a transmission chain (25), and the driven sprocket (23) at the lowest end is connected to the driving sprocket (26) of the power unit.

6. The hydraulic double-seal large-diameter polyurethane foam injection platform according to claim 1, characterized in that: The long transmission structure includes: a driven sprocket (23), an adjusting wheel (24), and a transmission chain (25); The driven sprocket (23) is mounted on the input end of the clamping lifting mechanism (19); The adjusting wheel (24) is mounted on the outside between two adjacent driven sprockets (23) and is used to adjust the tension of the transmission chain (25); The driven sprocket (23) is connected to the adjacent adjusting wheel (24) via a transmission chain (25), and the driven sprocket (23) at the lowest end is connected to the driving sprocket (26) of the power unit.

7. The hydraulic double-seal large-diameter polyurethane foam injection platform according to claim 6, characterized in that: The power unit includes: a drive motor (27), a drive sprocket (26), a main shaft (28), and a transmission shaft (29); The main shaft (28) is mounted on the bottom of the platform frame (1) via a bearing seat; both ends of the main shaft (28) are connected to one end of the drive shaft (29) via a universal joint structure. The other end of the drive shaft (29) is equipped with a drive sprocket (26) and a pulley (30); The drive motor (27) is fixedly mounted on the bottom of the platform frame (1), and its output end is equipped with a pulley (30) which is connected to the belt on the drive shaft (29) through a transmission belt to transmit power. The drive sprocket (26) is connected to the transmission chain (25) of the short transmission structure and the long transmission structure.

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