A pipe lining gel removal device

Abstract

This invention relates to a pipe lining adhesive removal device. The device includes a support mechanism and a spraying mechanism. The support mechanism includes a bracket and a connecting shaft, with the connecting shaft connected to the bracket. The spraying mechanism includes a rotating body, a nozzle, and a liquid medium supply component. The rotating body is connected to one end of the connecting shaft and can rotate relative to the connecting shaft. The nozzle is connected to the rotating body. The liquid medium supply component is used to supply ultra-high pressure liquid to the other end of the connecting shaft. The device has a working state. When in working state, the bracket abuts against the inner wall of the pipe, the axis of the connecting shaft is parallel to the center line of the pipe, and the nozzle outlet faces the inner wall of the pipe. Ultra-high pressure liquid is sprayed out through the nozzle. The pipe lining adhesive removal device provided by this invention allows ultra-high pressure liquid to enter through the connecting shaft, pass through the rotating body, and be sprayed out from the nozzle. The water column formed by the ultra-high pressure water cuts and peels off the adhesive lining, achieving environmentally friendly and efficient removal of the original adhesive lining inside the pipe.

Description

Technical Field

[0001] This invention relates to a device for removing adhesive from pipe linings. Background Technology

[0002] Rubber lining, also known as rubber bonding, involves bonding a thin sheet of extruded rubber to a metal surface using adhesives. This isolates corrosive media from the metal substrate, protecting it from corrosion. Its application dates back to 1855 in textile equipment components. With advancements in rubber technology, it is now widely used in equipment and pipelines exposed to corrosive media such as chemicals and seawater, offering a highly cost-effective corrosion protection solution. As service life increases, the rubber lining degrades due to factors such as media erosion, aging, mechanical damage, and fluid scouring. However, if the metal substrate still meets functional requirements, remanufacturing the metal substrate is unnecessary, especially when the metal substrate has specific regulatory requirements, such as nuclear-grade components in nuclear power plants. In such cases, removing the original rubber lining and re-lining becomes a cost-effective option.

[0003] The removal of the original rubber lining is usually achieved through mechanical scraping or ablation. Mechanical scraping is simple, generally done manually or mechanically, using a scraper to remove the rubber lining piece by piece. However, this method is generally inefficient, requires manual access to the equipment surface, and leaves rubber or adhesive residue on the equipment surface after scraping. These residues are elastic and can eject steel shot during subsequent sandblasting processes, severely affecting sandblasting efficiency.

[0004] Chinese patent CN201921748142.0 discloses a rubber lining removal device for a sheave device, which is a mechanical removal method. It utilizes the rotation of the sheave itself and a shovel with a shovel head at the top to remove the rubber lining. This method is convenient and efficient, but it cannot be used for rubber linings on the inner walls of pipes and also leaves residual rubber or adhesive. Methods for ablating rubber linings generally involve using a flame torch to directly burn the rubber layer or bake the outer wall of the equipment, or directly placing the equipment to be de-lined in firewood for ablating. These methods are simple to operate, but have several drawbacks: 1) The ablating process generates a large amount of smoke and odor, seriously affecting the environment and failing to meet environmental protection requirements; 2) For equipment with complex structures, the ablating process can cause deformation of the metal substrate structure, leading to dimensional changes and affecting its function; 3) If not properly controlled during the ablating process, the metal substrate may be subjected to excessively high temperatures, resulting in the substrate strength failing to meet design requirements after heat treatment. Summary of the Invention

[0005] The purpose of this invention is to provide a device for removing adhesive from pipe linings.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A pipe lining adhesive removal device includes a support mechanism and a spraying mechanism. The support mechanism includes a bracket and a connecting shaft, with the connecting shaft connected to the bracket. The spraying mechanism includes a rotating body, a nozzle, and a liquid medium supply component. The rotating body is connected to one end of the connecting shaft and can rotate relative to the connecting shaft. The nozzle is connected to the rotating body. The liquid medium supply component is used to supply ultra-high pressure liquid and is connected to the other end of the connecting shaft.

[0008] The device is in a working state. When in the working state, the bracket abuts against the inner wall of the pipe, the axis of the connecting shaft is parallel to the center line of the pipe, the outlet of the nozzle faces the inner wall of the pipe, and ultra-high pressure liquid is sprayed out through the nozzle.

[0009] In some embodiments, the nozzle includes a connecting rod and a nozzle, one end of the connecting rod is connected to the rotating body, the other end of the connecting rod is connected to one end of the nozzle, the other end of the nozzle is away from the rotating body, and the centerline of the nozzle coincides with the centerline of the connecting rod; the orifice diameter R of the nozzle is obtained by the following formula:

[0010]

[0011] Where Qi is the flow rate distributed by the nozzle, P is the working pressure, and k is 1.05 to 1.3.

[0012] In some embodiments, the nozzle includes a first nozzle and a second nozzle, which are distributed around the outer periphery of the rotating body; the second nozzle is closer to the other end of the connecting shaft than the first nozzle, and the angle between the center line of the first nozzle and the axis of the connecting shaft is greater than the angle between the center line of the second nozzle and the axis of the connecting shaft.

[0013] In some embodiments, the first nozzle includes a first connecting rod and a first nozzle, one end of the first connecting rod is connected to the rotating body, the other end of the first connecting rod is connected to one end of the first nozzle, the other end of the first nozzle is away from the rotating body, and the centerline of the first nozzle coincides with the centerline of the first connecting rod; the second nozzle includes a second connecting rod and a second nozzle, one end of the second connecting rod is connected to the rotating body, the other end of the second connecting rod is connected to one end of the second nozzle, the other end of the second nozzle is away from the rotating body, and the centerline of the second nozzle coincides with the centerline of the second connecting rod.

[0014] In some embodiments, the angle between the first connecting rod and the connecting shaft is 80-100°; the angle between the second connecting rod and the connecting shaft is 30-70°.

[0015] In some embodiments, the orifice diameter R1 of the first nozzle is obtained by the following formula:

[0016]

[0017] Where Q1 is the flow rate allocated to the first nozzle, P is the working pressure, and k is 1.05 to 1.3;

[0018] The orifice diameter R2 of the second nozzle is obtained by the following formula:

[0019]

[0020] Where Q2 is the flow rate distributed by the second nozzle, P is the working pressure, and k is 1.05 to 1.3.

[0021] In some embodiments, the diameter of the first nozzle is smaller than the diameter of the second nozzle.

[0022] In some embodiments, there are two first nozzles and two second nozzles, with one second nozzle located between one of the first nozzles and the connecting shaft, and the other second nozzle located between the other first nozzle and the connecting shaft.

[0023] In some embodiments, the liquid medium supply component is an ultra-high pressure water pump.

[0024] In some embodiments, the bracket includes a first support member and a second support member. The first support member is connected to the upper side of the connecting shaft, and the second support member is connected to the lower side of the connecting shaft. The first support member includes an upper rod and interlocking first and second rods. First rollers are respectively provided at opposite ends of the upper rod, and the first rollers are used to abut against the inner wall of the pipe. The opposite ends of the first rod are rotatably connected to the upper rod and the connecting shaft, respectively. The opposite ends of the second rod are rotatably connected to the upper rod and the connecting shaft, respectively. The second support member includes a lower rod and interlocking third and fourth rods. Second rollers are respectively provided at opposite ends of the lower rod, and the second rollers are used to abut against the pipe. The opposite ends of the third rod are rotatably connected to the lower rod and the connecting shaft, respectively. The opposite ends of the fourth rod are rotatably connected to the lower rod and the connecting shaft, respectively.

[0025] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0026] The pipe lining adhesive removal device provided by the present invention uses ultra-high pressure liquid to enter through the connecting shaft, and after passing through the rotating body, it is sprayed out from the nozzle. The water column formed by the ultra-high pressure liquid cuts and peels off the adhesive lining, achieving efficient, convenient, environmentally friendly, and non-damaging removal of the original adhesive lining inside the pipe. Attached Figure Description

[0027] Appendix Figure 1 An overall structural diagram of the pipe lining adhesive removal device provided by the present invention;

[0028] Appendix Figure 2 A cross-sectional view of the first nozzle of the first spray head of the pipe lining adhesive removal device provided by the present invention.

[0029] In the attached diagrams above:

[0030] 1-Bracket, 11-Upper rod, 12-First rod, second rod, 13-First roller, 14-Lower rod, 15-Third rod, fourth rod, 16-Second roller; 2-Connecting shaft; 3-Rotating body; 4-First nozzle, 41-First section, 42-Second section, 43-Third section; 5-Second nozzle; 6-Pipe; 7-Rotating connector. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] See Figures 1 to 2The pipe lining adhesive removal device shown includes a support mechanism and a spraying mechanism. The support mechanism includes a bracket 1 and a connecting shaft 2. The connecting shaft 2 is connected to the bracket 1 and is supported by the bracket 1, which also supports the entire device, ensuring that the centerline of the connecting shaft 2 is substantially aligned with the centerline of the pipe 6. When the device is placed inside the pipe 6, the centerline of the connecting shaft 2 is parallel to the centerline of the pipe 6; preferably, the centerline of the connecting shaft 2 coincides with the centerline of the pipe 6.

[0034] See Figure 1 The bracket 1 includes a first support member and a second support member. The first support member is connected to the upper side of the connecting shaft 2, and the second support member is connected to the lower side of the connecting shaft 2. The first support member includes an upper rod 11 and interlocking first and second rods 12. First rollers 13 are respectively provided at opposite ends of the upper rod 11. The first rollers 13 are used to abut against the inner wall of the pipe 6. The opposite ends of the first rod are rotatably connected to the right end of the upper rod 11 and the left end of the connecting shaft 2, respectively. The opposite ends of the second rod are rotatably connected to the left end of the upper rod 11 and the right end of the connecting shaft 2, respectively. The second support member includes a lower rod 14 and an interlocking first rod 12. The third and fourth rods 15 are forked together, and the lower rod 14 has a second roller 16 at each end. The second roller 16 is used to abut against the pipe 6. The two ends of the third rod are rotatably connected to the right end of the lower rod 14 and the left end of the connecting shaft 2, respectively. The two ends of the fourth rod are rotatably connected to the left end of the lower rod 14 and the right end of the connecting shaft 2, respectively. The line connecting the intersection of the first and second rods 12 and the intersection of the third and fourth rods 15 is a vertical line. The first roller 13 and the second roller 16 are provided so that the device can move along the inner wall of the pipe 6. The support can be used for pipes of different diameters.

[0035] In some embodiments, the device may also include a drive mechanism for driving the device to move within the pipe 6, and the drive mechanism may be connected to a support mechanism.

[0036] The spraying mechanism includes a rotating body 3, a nozzle, and a liquid medium supply component. The rotating body 3 is connected to one end of the connecting shaft 2. The rotating body 3 can rotate relative to the connecting shaft 2 as the rotating shaft. The nozzle is connected to the rotating body 3. The liquid medium supply component is used to connect to the other end of the connecting shaft 2 and is used to provide ultra-high pressure liquid.

[0037] In this example, the rotating body 3 and the connecting shaft 2 are sealed by a high-pressure seal, see [link / reference]. Figure 1The rotating body 3 and the connecting shaft 2 are connected by a rotating connector 7 that achieves medium- and high-pressure sealing. The rotating connector 7 has a rotating high-pressure seal inside, and the core of the rotating connector 7 is rotatable. The rotating connector 7 is threadedly connected to the rotating body 3. The liquid jet pressure at the nozzle needs to reach 90-150 MPa, preferably 100-120 MPa. The ultra-high-pressure liquid enters through the connecting shaft 2, passes through the rotating body 3, and is ejected from the nozzle. The water column formed by the ultra-high-pressure water cuts and peels off the rubber lining, achieving environmentally friendly and efficient removal of the original rubber lining inside the pipe.

[0038] In this example, the device is in a working state. When in a working state, the support 1 abuts against the inner wall of the pipe 6, the axis of the connecting shaft 2 is parallel to the center line of the pipe 6, the nozzle outlet faces the inner wall of the pipe 6, and the ultra-high pressure liquid is sprayed out through the nozzle.

[0039] In some embodiments, the nozzle includes a connecting rod and a nozzle. One end of the connecting rod is connected to the rotating body 3, and the other end of the connecting rod is connected to one end of the nozzle. The other end of the nozzle is away from the rotating body 3, and the centerline of the nozzle coincides with the centerline of the connecting rod. The length of the connecting rod is matched according to the diameter of the pipe 6 to be treated, ensuring that the distance between the nozzle and the pipe wall along the connecting rod direction is 20 to 200 times the nozzle orifice diameter. The nozzle orifice diameter is selected based on the flow rate and working pressure of the ultra-high pressure water pump used, and the nozzle orifice diameter R is obtained by the following formula:

[0040]

[0041] Where Qi is the flow rate distributed by the nozzle, P is the working pressure, and k is 1.05 to 1.3.

[0042] In some embodiments, the nozzle orifice diameter may be in the range of 0.2 to 1.2 mm.

[0043] In this example, the nozzle extension line (extending away from the rotating head) does not intersect the center line of the connecting shaft 2 in space. When the water jet is ejected from the nozzle, the reaction force generates a rotational torque, causing the rotating body 3 to rotate automatically. The rotational speed of the rotating body 3 is preferably 30 rpm to 120 rpm, and the speed is controlled by adjusting the resistance of the rotating body 3 or the rotational torque.

[0044] In some embodiments, the nozzle includes a first nozzle 4 and a second nozzle 5, which are distributed around the outer periphery of the rotating body 3 and are all connected to the rotating body 3. The connection means that the connecting shaft 2, the rotating body 3 and the first nozzle 4 are all provided with a through channel, and the connecting shaft 2, the rotating body 3 and the second nozzle 5 are all provided with a through channel.

[0045] Preferably, the second nozzle 5 is closer to the other end of the connecting shaft 2 than the first nozzle 4, and the angle between the centerline of the first nozzle 4 and the axis of the connecting shaft 2 is greater than the angle between the centerline of the second nozzle 5 and the axis of the connecting shaft 2. The diameter of the first nozzle is preferably smaller than the diameter of the second nozzle, and the flow rate of the liquid ejected from the first nozzle is less than the flow rate of the liquid ejected from the second nozzle. The liquid ejected from the first nozzle cuts the inner lining of the pipe into stripes, while the liquid ejected from the second nozzle continuously peels off the lining. More water is ejected from the second nozzle for peeling the lining, improving work efficiency. The cooperation of the first nozzle 4 and the second nozzle 5 can continuously and thoroughly peel off the inner lining of the pipe.

[0046] The first nozzle 4 includes a first connecting rod and a first nozzle. One end of the first connecting rod is connected to the rotating body 3, and the other end of the first connecting rod is connected to one end of the first nozzle. The other end of the first nozzle is away from the rotating body 3. Preferably, the centerline of the first nozzle coincides with the centerline of the first connecting rod. The included angle between the first connecting rod and the connecting shaft 2 is 80-100°.

[0047] The second nozzle 5 includes a second connecting rod and a second nozzle. One end of the second connecting rod is connected to the rotating body 3, and the other end of the second connecting rod is connected to the second nozzle. The other end of the second nozzle is away from the rotating body 3. Preferably, the centerline of the second nozzle coincides with the centerline of the second connecting rod. The included angle between the second connecting rod and the connecting shaft 2 is 30-70°.

[0048] In a preferred embodiment, two first nozzles 4 and two second nozzles 5 are provided. One second nozzle 5 is located between one first nozzle 4 and the connecting shaft 2, and the other second nozzle 5 is located between the other first nozzle 4 and the connecting shaft 2. The first nozzle 4 includes a first connecting rod and a first nozzle, and the second nozzle 5 includes a second connecting rod and a second nozzle. The included angle between the first connecting rod and the connecting shaft 2 is 80-100°, preferably 90°, at which point the center lines of the two first connecting rods coincide. The included angle between the second connecting rod and the connecting shaft 2 is 30-70°, and both second connecting rods are located on the side of the two first connecting rods facing the connecting shaft. The liquid sprayed from the first nozzle cuts the rubber lining inside the pipe into stripes, and the liquid sprayed from the second nozzle continuously peels off the rubber lining. The water jets formed by two ultra-high pressure water jets at different angles cut and peel off the rubber lining, achieving environmentally friendly and efficient removal of the original rubber lining inside the pipe. It can also be mounted on automated traveling equipment to automate the entire process.

[0049] In this example, the liquid medium supply component is an ultra-high pressure water pump.

[0050] In this example, the orifice diameter R1 of the first nozzle is obtained using the following formula:

[0051]

[0052] Where Q1 is the flow rate allocated to the first nozzle, P is the working pressure, and k is 1.05 to 1.3.

[0053] The orifice diameter R2 of the second nozzle is obtained by the following formula:

[0054]

[0055] Where Q2 is the flow rate distributed by the second nozzle, P is the working pressure, and k is 1.05 to 1.3.

[0056] The working flow rate Q of the ultra-high pressure water pump, if the number of the first nozzles is m and the number of the second nozzles is n, the flow rate distributed between the first nozzles and the second nozzles satisfies the following formula:

[0057] Q = m × Q1 + n × Q2.

[0058] In this example, a commercially available high-pressure alloy nozzle can be selected. The first and second nozzles can have the same structure. See [link / reference]. Figure 2 Both the first nozzle and the second nozzle have liquid outlet channels inside. The liquid outlet channels include a first segment 41, a second segment 42, and a third segment 43 connected in sequence. The first segment 41, the second segment 42, and the third segment 43 are distributed in sequence from one end of the nozzle to the other end. That is, the first segment 41 is closer to one end of the nozzle than the third segment 43, and the third segment 43 is closer to the other end of the nozzle than the first segment 41. The diameter of the first segment 41 is consistent. The diameter of the second segment 42 gradually increases from one end of the nozzle to the other end. The diameter of the third segment 43 is consistent.

[0059] In a specific embodiment, a suitable first nozzle and a second nozzle are selected according to the formula above, as follows.

[0060] In this example, a DN600 pipe with a 4mm soft rubber lining is selected. The ultra-high pressure water pump has an operating pressure P of 110MPa, an operating flow rate Q of 70L / min, and a rated power of 180kW. Two of each of the first and second nozzles (4 and 5) are installed. The centerline of the first nozzle forms a 90° angle with the connecting shaft 2, and the centerline of the second nozzle forms a 45° angle with the central axis. The rotation speed is 90r / min. The total flow rate through the two first nozzles is 14L / min, so the flow rate through each first nozzle is 7L / min. The total flow rate through the two second nozzles is 56L / min, so the flow rate through each second nozzle is 28L / min.

[0061] The orifice diameter R1 of the first nozzle is calculated using the following formula:

[0062] R1 = k * 7 1 / 2 / (2.1 1 / 2 *110 1 / 4) = 0.59~0.73mm;

[0063] When k is 1.05, R1 = 0.59 mm; when k is 1.3, R1 = 0.73 mm.

[0064] The orifice diameter R2 of the second nozzle is calculated using the following formula:

[0065] R2 = k * 28 1 / 2 / (2.1 1 / 2 *110 1 / 4 = 1.18~1.46mm.

[0066] When k is 1.05, R1 = 1.18 mm; when k is 1.3, R1 = 1.46 mm.

[0067] In practical applications, the orifice diameter of the first nozzle is 0.6mm and the orifice diameter of the second nozzle is 1.2mm. After cleaning the rubber lining of the pipe using this device, the length removed is about 3 meters in 0.5 hours. The rubber lining of the pipe can be completely removed in this 3-meter section, with high working efficiency and good cleaning effect.

[0068] The pipe lining rubber removal device in this example is used for removing the original rubber lining during the refurbishment of seawater pipe linings. It solves the problem of ablation affecting the original pipe and pollution emissions during the current rubber lining removal process. In particular, for pipes with a diameter of DN700 and below, it can solve the risk of personnel injury caused by personnel being unable to enter the pipe or barely being able to enter the pipe. At the same time, it can be mounted on automated traveling equipment to realize the automation of the entire process.

[0069] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A device for removing adhesive from pipe linings, characterized in that, The system includes a support mechanism and a jetting mechanism. The support mechanism includes a bracket and a connecting shaft, with the connecting shaft connected to the bracket. The jetting mechanism includes a rotating body, a nozzle, and a liquid medium supply component. The rotating body is connected to one end of the connecting shaft and rotates relative to the connecting shaft. The nozzle is connected to the rotating body, and the liquid medium supply component is connected to the other end of the connecting shaft. The liquid medium supply component is used to provide ultra-high pressure liquid, with the liquid jet pressure at the nozzle being 90–150 MPa. The device is in a working state. When in the working state, the bracket abuts against the inner wall of the pipe, the axis of the connecting shaft is parallel to the center line of the pipe, the outlet of the nozzle faces the inner wall of the pipe, and ultra-high pressure liquid is sprayed out through the nozzle. The nozzle includes a connecting rod and a nozzle. One end of the connecting rod is connected to the rotating body, and the other end of the connecting rod is connected to one end of the nozzle. The other end of the nozzle is away from the rotating body, and the center line of the nozzle coincides with the center line of the connecting rod. The nozzle orifice diameter R ranges from 0.2 to 1.2 mm, and the nozzle orifice diameter R is obtained by the following formula: ， Where Qi is the flow rate distributed by the nozzle, in L / min; P is the working pressure, ranging from 90 to 150 MPa; and k is 1.05 to 1.

3. The nozzle includes a first nozzle and a second nozzle, which are distributed around the outer periphery of the rotating body and are both in communication with the rotating body. The first nozzle includes a first connecting rod and a first nozzle. One end of the first connecting rod is connected to the rotating body, and the other end of the first connecting rod is connected to one end of the first nozzle. The other end of the first nozzle is away from the rotating body, and the centerline of the first nozzle coincides with the centerline of the first connecting rod. The second nozzle includes a second connecting rod and a second nozzle. One end of the second connecting rod is connected to the rotating body, and the other end of the second connecting rod is connected to one end of the second nozzle. The other end of the second nozzle is away from the rotating body, and the centerline of the second nozzle coincides with the centerline of the second connecting rod. The diameter of the first nozzle is smaller than the diameter of the second nozzle; The first nozzle and the second nozzle have liquid outlet channels inside. The liquid outlet channels include a first section, a second section and a third section connected in sequence. The first section, the second section and the third section are distributed in sequence from one end of the nozzle to the other end. The first section is closer to one end of the nozzle than the third section, and the third section is closer to the other end of the nozzle than the first section. The diameter of the first section is consistent. The diameter of the second section gradually increases from one end of the nozzle to the other end. The diameter of the third section is consistent. The bracket includes a first support member and a second support member. The first support member is connected to the upper side of the connecting shaft, and the second support member is connected to the lower side of the connecting shaft. The first support member includes an upper rod and interlocking first and second rods. First rollers are respectively provided at opposite ends of the upper rod, and the first rollers are used to abut against the inner wall of the pipe. The opposite ends of the first rod are rotatably connected to the upper rod and the connecting shaft, respectively. The opposite ends of the second rod are also rotatably connected to the upper rod and the connecting shaft, respectively. The second support member includes a lower rod and interlocking third and fourth rods. Second rollers are respectively provided at opposite ends of the lower rod, and the second rollers are used to abut against the pipe. The opposite ends of the third rod are rotatably connected to the lower rod and the connecting shaft, respectively. The opposite ends of the fourth rod are also rotatably connected to the lower rod and the connecting shaft, respectively. The angle between the first connecting rod and the connecting shaft is 80-100°; the angle between the second connecting rod and the connecting shaft is 30-70°.

2. The pipe lining adhesive removal device according to claim 1, characterized in that, The orifice diameter R1 of the first nozzle is obtained by the following formula: ， Where Q1 is the flow rate allocated to the first nozzle, P is the working pressure, and k is 1.05 to 1.3; The orifice diameter R2 of the second nozzle is obtained by the following formula: ， Where Q2 is the flow rate distributed by the second nozzle, P is the working pressure, and k is 1.05 to 1.

3.

3. The pipe lining adhesive removal device according to claim 1, characterized in that, There are two first nozzles and two second nozzles. One second nozzle is located between one of the first nozzles and the connecting shaft, and the other second nozzle is located between the other first nozzle and the connecting shaft.

4. The pipe lining adhesive removal device according to claim 1, characterized in that, The liquid medium supply component is an ultra-high pressure water pump.

Images