Cold water lining plastic composite pipe convenient to maintain

Abstract

The utility model relates to the technical field of pipes, and discloses a cold water lining plastic composite pipe convenient to maintain, which comprises an outer pipe and an inner pipe, the inner pipe is positioned on the inner side of the outer pipe, the outer pipe is provided with a sealing structure, the sealing structure comprises a fixing sleeve, the bottom end of the fixing sleeve is communicated with the top of the outer pipe, and the bottom end of the fixing sleeve is communicated with the top of the outer pipe. The top end of the fixing sleeve is fixedly connected with a threaded sleeve, the inner side of the threaded sleeve is provided with threads, the inner side of the threaded sleeve is in threaded connection with a threaded rod, a sealing plug is arranged below the threaded rod, a cavity is formed in the sealing plug, and the two sides of the inner wall of the cavity are each provided with two openings. By means of the sealing structure, the inner pipe and the outer pipe are installed, the sealing performance of the interior of the inner pipe is improved, the leakage phenomenon is avoided, the inner pipe and the outer pipe are convenient to overhaul and replace, meanwhile, replacement of the whole composite pipe is avoided, and the practicability of the whole device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipes, in particular to a cold water plastic-lined composite pipe which is easy to maintain. Background Art

[0002] Composite pipes are based on a composite structure of metal and thermoplastics. They are lined with plastic polypropylene, polyethylene or welded with non-metallic materials such as cross-linked polyethylene. They have the advantages of both metal pipes and non-metallic pipes.

[0003] After searching, the Chinese patent publication number is CN216843480U. The document disclosed in this patent is as follows: A cold water lined plastic composite pipe that is easy to maintain, which relates to the field of pipe technology. The utility model includes an outer pipe and an inner pipe, and the outer side of the outer pipe is connected with a plurality of fixing rings, and the outer peripheral surface of the fixing ring is penetrated with a plurality of bolts connected by threads, the outer pipe and the inner pipe are detachably fixedly connected by bolts, and the two ends of the outer pipe are respectively fixedly connected with a connecting ring and an annular plate, and the connecting ring and the annular plate are used in combination. The utility model makes the inspection and replacement of the inner and outer pipes more convenient by arranging the inner pipe and the outer pipe to be detachably fixedly connected, while avoiding the replacement of the entire composite pipe, and by using the connecting ring and the annular plate that are respectively fixedly connected at the two ends of the outer pipe, and the connecting ring and the annular plate cooperate with each other, so as to solve the problems of the inconvenience of inspection of the existing cold water lined plastic composite pipe and the lack of stability at the connection between the two sections of pipes.

[0004] The existing technology has the following disadvantages during use: cold water contains various corrosive substances, and long-term immersion in water will cause the bolts to rust and corrode. Corrosion and immersion will reduce the pre-tightening force of the bolts, causing the connection to loosen, affecting the stability and sealing of the connection. In view of this, we propose a cold water lined plastic composite pipe that is easy to maintain. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a cold water plastic-lined composite pipe which is easy to maintain and solves the problems of poor connection stability and poor sealing of the composite pipe caused by rust or corrosion of the bolts.

[0006] To achieve the above objectives, the utility model adopts the following technical scheme: a cold water lined plastic composite pipe that is easy to maintain, comprising an outer tube and an inner tube, the inner tube is located on the inner side of the outer tube, a sealing structure is arranged on the outer tube, the sealing structure comprises a fixing sleeve, the bottom end of the fixing sleeve is connected to the top of the outer tube, the top of the fixing sleeve is fixedly connected with a threaded sleeve, the inner side of the threaded sleeve is provided with a thread, the inner side of the threaded sleeve is threadedly connected with a threaded rod, a sealing plug is arranged below the threaded rod, a cavity is provided inside the sealing plug, two openings are respectively provided on both sides of the inner wall of the cavity, a gear is fixedly connected to the bottom end of the threaded rod, two racks are respectively meshed on the gear, the gear and the two racks are both arranged inside the cavity, the rack extends outward from the opening, a bearing is fixedly connected to the center of the inner wall of the sealing plug, the inner ring of the bearing is fixedly connected to the surface of the threaded rod, and a through hole is provided near the center of the fixing sleeve on the inner tube.

[0007] As a further description of the above technical solution: a fixed structure is provided on the outer side of the outer tube, and the fixed structure includes an arc plate No. 1 and an arc plate No. 2, and a movable plate is hinged on one side adjacent to the arc plate No. 1 and the arc plate No. 2, and the other side of the arc plate No. 1 is fixedly connected to a limit sleeve No. 1, and the other side of the arc plate No. 2 is movably connected to a connecting plate through a pin shaft, and the other side of the connecting plate is fixedly connected to a limit sleeve No. 2, and connecting frames are provided on the inner sides of the limit sleeve No. 1 and the limit sleeve No. 2.

[0008] As a further description of the above technical solution: a sliding hole is opened on the outer side of the fixed sleeve, and the sliding hole is in a strip shape. A limiting rod is fixedly connected to the outer side of the sealing plug. The limiting rod is in contact with the hole wall of the sliding hole and is slidably connected. The limiting rod slides in the sliding hole, which can limit the sealing plug, so that the sealing plug can move up and down while having better stability.

[0009] As a further description of the above technical solution: a sealing ring is fixedly connected to the top of the sealing plug, and the sealing ring is circular in shape. The sealing ring is arranged in cooperation with the through hole. By the sealing ring being arranged to fit the edge of the outer side of the through hole, the sealing performance of the sealing plug to the through hole of the inner tube can be improved, thereby playing a role in preventing leakage.

[0010] As a further description of the above technical solution: a rotating frame is fixedly connected to the outer side of the threaded sleeve, and the rotating frame is in a petal shape. The rotating frame is provided to facilitate operators to rotate the threaded sleeve, so that the threaded sleeve can drive the threaded rod to move up and down.

[0011] As a further description of the above technical solution: the two racks are staggered and the two openings are staggered, the racks are in contact with the inner wall of the cavity and are slidably connected, and the cavity is used to accommodate a gear and two racks, and the two racks are driven away from each other by the gears, so that the total length of the two racks is greater than the diameter of the through hole, thereby limiting the inner tube. When the two racks approach each other, the two racks enter the cavity of the sealing plug from the opening. Since the sealing plug is smaller than the aperture of the through hole, the sealing plug can be separated upward from the through hole, which is convenient for the inspection and replacement of the inner tube and the outer tube, while avoiding the replacement of the entire composite tube, thereby improving the practicality of the overall device.

[0012] As a further description of the above technical solution: the top of the No. 2 limiting sleeve is fixedly connected with a push plate, the end of the push plate is arranged in an arc shape, the outer side of the No. 1 arc plate is bonded with a mother Velcro, and the side of the push plate is bonded with a child Velcro, and the child Velcro and the mother Velcro are detachably connected. Under the action of the connecting frame, the push plate fits the outer side of the outer tube. Due to the arc setting of the end of the push plate, the problem of difficulty in separation caused by the push plate being completely fitted into the outer tube can be avoided. Through the detachable connection between the child Velcro and the mother Velcro, the stability between the No. 1 arc plate and the No. 2 arc plate after locking is improved.

[0013] As a further description of the above technical solution: the connecting frame is in the shape of a "U". The outer wall of the connecting frame is movably sleeved on the inner side of the No. 1 limit sleeve and the No. 2 limit sleeve. The connecting frame is arranged to rotate around the No. 1 limit sleeve and the No. 2 limit sleeve respectively to achieve locking between the No. 1 arc plate and the No. 2 arc plate, thereby firmly fixing the outer tube, improving the stability of the outer tube during use and after installation, and also facilitating the disassembly of the outer tube.

[0014] The utility model has the following beneficial effects:

[0015] 1. The utility model realizes the installation of the inner tube and the outer tube by setting a sealing structure, improves the sealing inside the inner tube, avoids leakage, facilitates the inspection and replacement of the inner tube and the outer tube, and avoids the replacement of the entire composite tube, improves the practicality of the overall device, and solves the problem in the prior art that long-term immersion of the bolts in water will cause rust and corrosion of the bolts, and corrosion and immersion will reduce the pre-tightening force of the bolts, resulting in loose connection, affecting the stability and sealing of the connection.

[0016] 2. The utility model sets up a fixed structure and utilizes the mutual cooperation between the connecting frame, the connecting plate and the abutment plate to achieve the locking and limiting effect between the No. 1 arc plate and the No. 2 arc plate, thereby firmly fixing the outer tube and improving the stability of the outer tube during use and after installation. The more stable composite tube is not prone to deformation, cracking and other damages in various environments and working conditions, so it can operate reliably for a long time and reduce the frequency of replacement and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is an external schematic diagram of the sealing structure in the utility model;

[0019] Figure 3 It is a partial schematic diagram of the sealing structure in the utility model;

[0020] Figure 4 It is a top cross-sectional view of the sealing plug in the utility model;

[0021] Figure 5 It is a schematic diagram of the fixing structure in the utility model;

[0022] Figure 6 It is a structural schematic diagram of the inner tube in the utility model.

[0023] Legend:

[0024] 1. Outer tube; 2. Inner tube; 3. Fixed structure; 301. No. 1 arc plate; 302. Movable plate; 303. No. 2 arc plate; 304. Connecting plate; 305. No. 1 limiting sleeve; 306. Connecting frame; 307. Abutment plate; 308. No. 2 limiting sleeve; 4. Sealing structure; 401. Fixed sleeve; 402. Sliding hole; 403. Limiting rod; 404. Threaded rod; 405. Threaded sleeve; 406. Rotating frame; 407. Bearing; 408. Sealing ring; 409. Sealing plug; 4010. Rack; 4011. Cavity; 4012. Opening. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Reference Figure 1 - Figure 3The utility model provides an embodiment: a cold water lined plastic composite pipe that is easy to maintain, comprising an outer pipe 1 and an inner pipe 2, the inner pipe 2 is located on the inner side of the outer pipe 1, and a sealing structure 4 is arranged on the outer pipe 1, and the sealing structure 4 comprises a fixed sleeve 401, the bottom end of the fixed sleeve 401 is connected with the top of the outer pipe 1, and the top of the fixed sleeve 401 is fixedly connected with a threaded sleeve 405, the inner side of the threaded sleeve 405 is provided with a thread, and the inner side of the threaded sleeve 405 is threadedly connected with a threaded rod 404, and a sealing plug 409 is arranged below the threaded rod 404, and a sliding hole 402 is provided on the outer side of the fixed sleeve 401, and the sliding hole 402 is in a strip shape, and a limiting rod 403 is fixedly connected to the outer side of the sealing plug 409, and the limiting rod 403 contacts and is slidably connected with the hole wall of the sliding hole 402, and the limiting rod 403 slides in the sliding hole 402, which can limit the sealing plug 409, so that the sealing plug 409 can move up and down while having better stability.

[0027] Reference Figure 4 , Figure 6 A cavity 4011 is provided in the middle of the inner wall of the sealing plug 409, and two openings 4012 are respectively provided on both sides of the inner wall of the cavity 4011. A gear is fixedly connected to the bottom end of the threaded rod 404, and the gears are respectively engaged with two racks 4010. The gear and the two racks 4010 are arranged inside the cavity 4011, and the racks 4010 extend outward from the opening 4012. A bearing 407 is fixedly connected to the center of the inner wall of the sealing plug 409, and the inner ring of the bearing 407 is fixedly connected to the surface of the threaded rod 404. The inner tube 2 is close to the center of the fixed sleeve 401. A through hole is opened, and a sealing ring 408 is fixedly connected to the top of the sealing plug 409. The sealing ring 408 is circular in shape and is arranged in coordination with the through hole. The sealing ring 408 is arranged to fit the edge of the outer side of the through hole, which can improve the sealing performance of the sealing plug 409 to the through hole of the inner tube 2, thereby playing a role in preventing leakage. A rotating frame 406 is fixedly connected to the outer side of the threaded sleeve 405. The rotating frame 406 is petal-shaped. The rotating frame 406 is arranged to facilitate operators to rotate the threaded sleeve 405, so that the threaded sleeve 405 can drive the threaded rod 404 to move up and down.

[0028] Reference Figure 4 , Figure 6The two racks 4010 are staggered and the two openings 4012 are staggered. The four sides of the racks 4010 are in contact with the inner wall of the cavity 4011 and are slidably connected. The cavity 4011 is used to accommodate the gear and the two racks 4010. The gears drive the two racks 4010 away from each other, so that the total length of the two racks 4010 is greater than the diameter of the through hole, thereby limiting the inner tube 2. When the two racks 4010 are close to each other, the two racks 4010 enter the cavity 4011 of the sealing plug 409 from the opening 4012. Since the sealing plug 409 is smaller than the aperture of the through hole, the sealing plug 4 09 can be separated upward from the through hole, which is convenient for the inspection and replacement of the inner tube 2 and the outer tube 1, while avoiding the replacement of the entire composite tube, and improving the practicality of the overall device. Through the provided sealing structure 4, the inner tube 2 and the outer tube 1 can be installed while improving the sealing inside the inner tube 2 to avoid leakage, which is convenient for the inspection and replacement of the inner tube 2 and the outer tube 1, while avoiding the replacement of the entire composite tube, and improving the practicality of the overall device. It solves the problem in the prior art that long-term immersion of the bolts in water will cause the bolts to rust and corrode, and corrosion and immersion will reduce the pre-tightening force of the bolts, resulting in loose connections, affecting the stability and sealing of the connections.

[0029] Reference Figure 5 As shown, a fixed structure 3 is provided on the outside of the outer tube 1, and the fixed structure 3 includes a first arc plate 301 and a second arc plate 303. A movable plate 302 is hinged on one side adjacent to the first arc plate 301 and the second arc plate 303. A first limiting sleeve 305 is fixedly connected to the other side of the first arc plate 301. A connecting plate 304 is movably connected to the other side of the second arc plate 303 through a pin shaft. A second limiting sleeve 308 is fixedly connected to one side of the connecting plate 304. A connecting frame 306 is provided on the inner sides of the first limiting sleeve 305 and the second limiting sleeve 308. The connecting frame 306 is in the shape of a bracket. The outer wall of the connecting frame 306 is movably sleeved on the inner side of the No. 1 limiting sleeve 305 and the No. 2 limiting sleeve 308 through the setting of the connecting frame 306, which rotates around the No. 1 limiting sleeve 305 and the No. 2 limiting sleeve 308 respectively, so as to realize the locking between the No. 1 arc plate 301 and the No. 2 arc plate 303, so as to firmly fix the outer tube 1, improve the stability of the outer tube 1 during use and after installation, and also facilitate the disassembly effect of the outer tube 1, and the outer side of the No. 2 limiting sleeve 308 is fixedly connected with a butt plate 307, and the end of the butt plate 307 is arranged in an arc shape.

[0030] Reference Figure 1 , Figure 5As shown, a mother Velcro is bonded to the outer side of the first arc plate 301, and a child Velcro is bonded to the side of the push plate 307, and the child Velcro is detachably connected to the mother Velcro. Under the action of the connecting frame 306, the push plate 307 fits the outer side of the outer tube 1. Due to the arc setting at the end of the push plate 307, it can avoid the problem of the push plate 307 being completely fitted to the outer tube 1 and causing difficulty in separation. Through the detachable connection between the child Velcro and the mother Velcro, the stability of the first arc plate 301 and the second arc plate 303 after locking is improved. Through the setting of the fixing structure 3, the mutual cooperation between the connecting frame 306, the connecting plate 304 and the push plate 307 can be used to achieve the locking and limiting effect between the first arc plate 301 and the second arc plate 303, so that the outer tube 1 is firmly fixed, and the stability of the outer tube 1 during use and after installation is improved. The more stable composite tube is not prone to deformation, rupture and other damage in various environments and working conditions, so that it can operate reliably for a long time and reduce the frequency of replacement and maintenance.

[0031] Working principle: When the outer tube 1 needs to be installed, the push plate 307 is pulled to make the connecting frame 306 rotate around the No. 1 limiting sleeve 305 and the No. 2 limiting sleeve 308 respectively. When the push plate 307 fits the outer side of the No. 2 arc plate 303, the side Velcro of the push plate 307 is adhered to the mother Velcro, so as to achieve locking between the No. 1 arc plate 301 and the No. 2 arc plate 303, so that the outer tube 1 is firmly fixed, and the stability of the outer tube 1 during use and after installation is improved. The push plate 307 is bent outward to make the connecting plate 304 and the connecting frame 306 in an active state. In this state, the outer tube 1 can be disassembled. Due to the arc setting at the end of the push plate 307, the problem of difficulty in separation caused by the push plate 307 being completely fitted with the outer tube 1 can be avoided. When the inner tube 2 and the outer tube 1 need to be connected and installed, the threaded rod 404 is rotated to make the threaded rod 404 As the inner side of the threaded sleeve 405 moves downward and the threaded rod 404 moves downward, the bottom end of the threaded rod 404 also drives the gear to rotate. The cavity 4011 in the sealing plug 409 is used to accommodate the gear and the two racks 4010. Since the gears are respectively engaged with the two racks 4010, the two racks 4010 are respectively driven away from each other through the rotation of the gears, so that the total length of the two racks 4010 is greater than the diameter of the through hole, thereby playing a role in installing the inner tube 2. When the two racks 4010 approach each other, the two racks 4010 enter the cavity 4011 of the sealing plug 409 from the opening 4012. Since the sealing plug 409 is smaller than the aperture of the through hole, the sealing plug 409 can be separated upward from the through hole, which is convenient for the inspection and replacement of the inner tube 2 and the outer tube 1, while avoiding the replacement of the entire composite tube, thereby improving the practicality of the overall device.

[0032] The above implementation methods are only used to illustrate the embodiments of the present utility model, and are not limitations of the embodiments of the present utility model. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the embodiments of the present utility model. Therefore, all equivalent technical solutions also belong to the scope of the embodiments of the present utility model. The patent protection scope of the embodiments of the present utility model should be limited by the claims.

Claims

1. A cold water plastic-lined composite pipe that is easy to maintain, comprising an outer pipe (1) and an inner pipe (2), characterized in that: The inner tube (2) is located on the inner side of the outer tube (1); a sealing structure (4) is provided on the outer tube (1); the sealing structure (4) comprises a fixing sleeve (401); the bottom end of the fixing sleeve (401) is connected to the top of the outer tube (1); the top end of the fixing sleeve (401) is fixedly connected to a threaded sleeve (405); the inner side of the threaded sleeve (405) is provided with threads; the inner side of the threaded sleeve (405) is threadedly connected to a threaded rod (404); a sealing plug (409) is provided below the threaded rod (404); a cavity (4011) is provided inside the sealing plug (409); the cavity (4011) is provided inside the sealing plug (409); Two openings (4012) are respectively provided on both sides of the inner wall of the cavity (4011); a gear is fixedly connected to the bottom end of the threaded rod (404); two racks (4010) are respectively meshed on the gear; the gear and the two racks (4010) are both arranged inside the cavity (4011); the racks (4010) extend outward from the openings (4012); a bearing (407) is fixedly connected to the center of the inner wall of the sealing plug (409); the inner ring of the bearing (407) is fixedly connected to the surface of the threaded rod (404); and a through hole is provided in the inner tube (2) near the center of the fixing sleeve (401).

2. The cold water plastic-lined composite pipe that is easy to maintain according to claim 1 is characterized in that: A fixed structure (3) is arranged on the outer side of the outer tube (1), and the fixed structure (3) comprises a first arc plate (301) and a second arc plate (303); a movable plate (302) is hingedly connected to one side adjacent to the first arc plate (301) and the second arc plate (303); a first limiting sleeve (305) is fixedly connected to the other side of the first arc plate (301); a connecting plate (304) is movably connected to the other side of the second arc plate (303) via a pin shaft; a second limiting sleeve (308) is fixedly connected to the other side of the connecting plate (304); and a connecting frame (306) is arranged on the inner sides of the first limiting sleeve (305) and the second limiting sleeve (308).

3. The cold water plastic-lined composite pipe that is easy to maintain according to claim 1 is characterized in that: The outer side of the fixing sleeve (401) is provided with a sliding hole (402), the sliding hole (402) is in a strip shape, the outer side of the sealing plug (409) is fixedly connected to a limiting rod (403), and the limiting rod (403) is in contact with the hole wall of the sliding hole (402) and is slidably connected.

4. The cold water plastic-lined composite pipe that is easy to maintain according to claim 1 is characterized in that: A sealing ring (408) is fixedly connected to the top of the sealing plug (409); the sealing ring (408) is circular in shape and is arranged in cooperation with the through hole.

5. The cold water plastic-lined composite pipe that is easy to maintain according to claim 1 is characterized in that: The outer side of the threaded sleeve (405) is fixedly connected to a rotating frame (406), and the rotating frame (406) is in a petal shape.

6. The cold water plastic-lined composite pipe that is easy to maintain according to claim 1 is characterized in that: The two racks (4010) are respectively arranged in a staggered manner, and the two openings (4012) are respectively opened in a staggered manner. The outer periphery of the rack (4010) is in contact with the inner wall of the cavity (4011) and is slidably connected.

7. The cold water plastic-lined composite pipe that is easy to maintain according to claim 2 is characterized in that: A pressing plate (307) is fixedly connected to the top of the second limiting sleeve (308). The end of the pressing plate (307) is arc-shaped. A female magic tape is adhered to the outer side of the first arc plate (301), and a male magic tape is adhered to the side surface of the pressing plate (307). The male magic tape and the female magic tape are detachably connected.

8. The cold water plastic-lined composite pipe that is easy to maintain according to claim 2 is characterized in that: The connecting frame (306) is in a "return" shape, and the outer wall of the connecting frame (306) is movably sleeved inside the first limiting sleeve (305) and the second limiting sleeve (308).

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