Plastic top-pull pipe and connecting structure of plastic top-pull pipe

Abstract

The utility model discloses a plastic top pull pipe and a connecting structure of the plastic top pull pipe, which comprise a pipe main body, one end of the pipe main body is provided with a bellmouth, the other end of the pipe main body is provided with an inserting opening matched with the bellmouth, the inserting opening is sleeved with a cleaning piece used for cleaning the surface of the inserting opening and a bonding piece containing glue inside, and the cleaning piece and the bonding piece are matched with each other. The cleaning piece is located on the side, close to the bellmouth, of the bonding piece. The connecting structure comprises at least two plastic jacking and pulling pipes, wherein the inserting opening of one plastic jacking and pulling pipe is inserted into the bell mouth of the other plastic jacking and pulling pipe. According to the utility model, the connection of the plastic top-pull pipe is more convenient, the processing technology is simple, and the production efficiency is improved while the connection reliability is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic pipes, and more specifically to a plastic top-pull pipe and a connection structure of the plastic top-pull pipe. Background Art

[0002] The main methods of connecting plastic pipes include adhesive bonding, socket connection, welding and flange connection, among which adhesive bonding is the method with the lowest cost and the most convenient construction. Plastic jacking pipe is a new type of pipe that replaces concrete jacking pipe in recent years. In addition to requiring good sealing of pipe connection, it also requires the pipe to withstand large longitudinal jacking force and pulling tensile force. Therefore, there are special requirements for the connection port of the pipe, which is the key point of product design.

[0003] The existing product connection port design mainly adopts the form of undercut locking to provide the traction and tensile force of the pipeline connection port. The method is to use a mechanical processing method to process a spigot with several annular protrusions at one end of the pipe, and a socket with the same number of annular grooves at the other end. The protrusion of the spigot and the groove of the socket are interference fit, and the protrusion and the groove have a certain inclination angle. When the spigot is inserted into the socket with force, an undercut is formed between the protrusion and the groove to prevent the connection port from loosening. This technology has two serious disadvantages. First, the spigot and the spigot are formed by mechanical processing, which requires a large amount of mechanical processing work, and the dimensional accuracy requirements are high, the processing difficulty is large, and the production efficiency is low; second, when cutting and removing about 50% of the pipe wall thickness, in order to ensure the mechanical strength of the socket and the spigot, the wall thickness of the pipe used is thicker, more materials are consumed, and the pipe material cost is higher.

[0004] The prior art CN218935487U discloses a socket structure for a jacking pipe, comprising a socket respectively arranged on a first jacking pipe and a spigot arranged on a second jacking pipe, the spigot can be sealingly inserted in the socket, a push-up retaining ring is fixed on the outer surface of the spigot, and when the spigot is inserted into the socket, the push-up retaining ring abuts against the socket; an annular groove is arranged on the socket, and the annular groove separates the socket into a first socket part and a second socket part, wherein the first socket part is arranged close to the spigot relative to the second socket part, a connecting hole is arranged on the first socket part and passes through the length direction of the first jacking pipe, and the connecting hole is connected with the annular groove, a threaded hole corresponding to the connecting hole and passing through the length direction of the first jacking pipe is arranged on the push-up retaining ring, a bolt is arranged in the annular groove, and the bolt passes through the connecting hole and is connected with the threaded hole, so that the socket and the spigot are tightly connected. In the socket structure of the jacking pipe of the utility model, the bolts are arranged horizontally, and the bolts are less impacted by shear force, which can avoid loosening between the two. However, the processing technology of the socket structure of the jacking pipe of the technical solution is complicated, which affects the production efficiency. Utility Model Content

[0005] In order to solve the above problems, the utility model proposes a plastic top-pull tube and a connection structure of the plastic top-pull tube, wherein a cleaning member is used to scrape off foreign matter on the socket under the push of the socket to keep the bonding surface clean, thereby improving the bonding reliability, and then the adhesive member is used to evenly contact the socket and the plug to bond and fix the socket and the plug.

[0006] To achieve the above-mentioned purpose, the utility model provides a plastic top-pull tube, including a tube body, one end of the tube body is provided with a socket, the other end of the tube body is provided with a plug adapted to the socket, the plug is provided with a cleaning piece for cleaning its surface and an adhesive piece containing glue inside, the cleaning piece and the adhesive piece are arranged in sequence along the plug from the inside to the outside.

[0007] In the present technical solution, when the socket of one pipe body is inserted into the socket of another pipe body, the socket and the socket move relative to each other, and the cleaning member provided on the socket is pushed inward by the socket to scrape off foreign matter such as dust particles on the socket, so that the bonding surface on the socket remains clean. As the socket continues to be inserted, the glue inside the adhesive member is squeezed out and evenly contacts the socket and the socket. When the glue solidifies, the fixation of the two sections of the pipe body is completed.

[0008] As a preferred solution, in order to enable the cleaning member to evenly scrape off impurities on the outer periphery of the socket, the cleaning member is a flexible annular structure, the cleaning member is sleeved on the socket, the cleaning member and the socket are interference fit, when the socket is inserted into the socket, the end face of the socket abuts against the cleaning member and pushes the cleaning member to slide along the outer surface of the socket, and the cleaning member can effectively prevent the adhesive from overflowing.

[0009] As a preferred solution, in order to accommodate the cleaning member, the inner radial direction of the socket is recessed inward to form an accommodating space for accommodating the cleaning member.

[0010] As a preferred solution, in order to ensure that the adhesive is in contact with the socket and the plug, the adhesive includes an annular tube and an adhesive. The annular tube is sleeved on the plug, a cavity is formed inside the annular tube, and the adhesive is accommodated in the cavity. A release hole for releasing the adhesive is provided on the annular tube. When the plug is inserted into the socket, the annular tube ruptures and releases the adhesive under the squeezing of the socket and the plug. The adhesive uniformly contacts the socket and the plug. The adhesive solidifies after contacting with the air, so that the plug and the socket are firmly fixed. Under the protection of the annular tube, the adhesive can be prevented from reacting with the air in advance. The method of wrapping the adhesive with the annular tube can facilitate the installation of the pipe body, is quick to install, and avoids temporary gluing. Moreover, the cavity of the annular tube can better control the amount of adhesive used, avoiding waste caused by too much adhesive or reduced bonding reliability caused by too little adhesive.

[0011] As a preferred solution, in order to prevent the annular tube from being squeezed out and releasing the adhesive prematurely, the outer circumference of the socket is recessed inward to form a step for accommodating the annular tube, and the annular tube is sleeved on the step. When the socket is inserted into the socket, the inner end face of the socket and the end face of the step jointly squeeze the annular tube, so that the adhesive is squeezed out and released simultaneously when the socket and the socket are assembled into place.

[0012] As a preferred solution, in order to further enhance the sealing performance of the connection between the two pipe bodies, a sealing ring is sleeved on the step. The sealing ring is located on the side of the adhesive away from the socket. When the socket is inserted into the socket, the sealing ring can scrape off dust and other impurities on the surface of the inner ring of the socket to ensure that the bonding surface of the inner ring of the socket is clean; when the end of the socket contacts the internal end face of the socket, the sealing ring can assist in extruding the annular tube. When the socket and the socket are installed in place, the sealing ring is interference fit with the socket and the socket respectively.

[0013] As a preferred solution, the outer circumferential surface of the sealing ring is provided with a plurality of groove structures along the circumferential direction, and the groove structures can increase the compression deformation of the sealing ring to improve the sealing performance.

[0014] As a preferred solution, in order to improve the sealing performance, an abutment portion for abutting against the sealing ring is provided inside the socket.

[0015] As a preferred solution, in order to enable the socket and the socket to be installed in place, a buckle is fixed on the socket, and a groove corresponding to the buckle is provided on the socket, and the buckle is engaged with the groove. When the buckle is engaged with the groove, the socket and the socket can be kept relatively fixed to prevent axial movement from affecting the bonding quality of the adhesive. At the same time, the buckle can replace manual hand-held operation, and the operation is more convenient.

[0016] To achieve the above-mentioned purpose, the utility model provides a connection structure of a plastic top-pull tube, comprising at least two of the above-mentioned plastic top-pull tubes, wherein the socket of one of the plastic top-pull tubes is inserted into the socket of the other plastic top-pull tube, and the adhesive forms an adhesive layer between the socket and the socket.

[0017] In the technical solution, a plurality of the pipe bodies can be connected by the end-to-end cooperation of the spigot and the socket, which is simple and quick to assemble with high reliability, and avoids the tedious process of manual gluing.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The utility model uses a cleaning piece arranged on the socket to scrape away impurities on the surface of the socket along with the push of the socket, thereby ensuring the cleanliness of the bonding surface.

[0020] 2. The utility model ensures the reliability of connection by bonding the socket and the plug with an adhesive containing glue, and can replace the cumbersome process of manual glue application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the plastic top-pull pipe of the utility model;

[0022] Figure 2 yes Figure 1 A partial enlarged view of part A;

[0023] Figure 3 It is a schematic diagram of the connection structure of the plastic top pull tube;

[0024] Figure 4 yes Figure 3 A partial enlarged view of part B;

[0025] Figure 5 Schematic diagram of the position of the bonding layer.

[0026] In the figure: the pipe body 1; the socket 2; the step 201; the socket 3; the accommodating space 301; the cleaning member 4; the adhesive member 5; the sealing ring 6; and the adhesive layer 7. DETAILED DESCRIPTION

[0027] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0030] Embodiment 1:

[0031] like Figure 1 , 2 As shown, a plastic top-pull tube includes a tube body 1, one end of the tube body 1 is provided with a socket 3, the other end of the tube body 1 is provided with a plug 2 adapted to the socket 3, the plug 2 is provided with a cleaning member 4 for cleaning the surface of the plug 2 and an adhesive member 5 containing glue inside, and the cleaning member 4 is located on the side of the adhesive member 5 close to the socket 3.

[0032] In this embodiment, the plastic top-pull pipe is mainly used in drainage, rainwater and sewage pipes, ground centerline protection and communication cables in residences, apartments, gardens and other places. It is composed of unsaturated polyester resin and glass fiber with high molecular weight components, and can effectively resist corrosion from salt, acid, alkali and untreated chemical wastewater, domestic sewage, corrosive soil and chemical liquids. The socket 3 of the pipe body 1 is processed by heating and expanding the mouth. This method can ensure that the internal diameter of the pipe body 1 is constant.

[0033] Specifically, the adhesive member 5 includes an annular tube and an adhesive. The annular tube is sleeved on the socket 2. A cavity is formed inside the annular tube. The adhesive is arranged in the cavity. A release hole for releasing the adhesive is opened on the annular tube. In this embodiment, the annular tube is made of a plastic film, which can effectively store the adhesive.

[0034] In the present embodiment, since the spigot 2 and the socket 3 are connected by adhesive bonding, they have the characteristics of continuous stress distribution, light weight, or sealing, and low process temperature in most cases. Adhesive bonding is particularly suitable for the connection of different materials, different thicknesses, ultra-thin specifications and complex components. Among them, the selection of adhesives is particularly important. When selecting adhesives, the type of glue that matches the pipe material should be selected according to the different characteristics of the pipe material. For example, the performance requirements of different metal materials and non-metallic materials under the environment and shear force are different, and the best glue should be selected, and the performance of the glue should meet the working conditions, such as high viscosity, high temperature resistance, and corrosion resistance, to ensure long-term safe operation. Among them, the working conditions of chemical pipelines are very special, such as high pressure, high temperature, high humidity and strong acid and alkaline environment. Therefore, the selected glue should have high shear resistance, heat resistance, corrosion resistance and durability. Adhesives can be epoxy resin glue, polyurethane glue and polyester glue. Epoxy resin glue is suitable for connecting metal and non-metal materials in chemical pipelines. Epoxy resin glue has the characteristics of high strength and high viscosity, so it has excellent bonding performance under special working conditions such as high temperature, high pressure and high vibration. Polyurethane glue is a strong glue suitable for connecting various metal materials, especially for high-intensity working conditions. It has the advantages of high temperature resistance and corrosion resistance, and has excellent durability and weather resistance. Polyester glue can be used to connect non-metallic materials, especially glass fiber pipes. Polyester glue can be used for connection operations at low temperatures, but it should be noted that its ability to resist shear is limited.

[0035] Specifically, the outer circumference of the socket 2 is recessed inward to form a step 201 for accommodating the annular tube, and the annular tube is sleeved on the step 201 .

[0036] In this embodiment, the socket 2 is cut to form a step 201 .

[0037] Specifically, a sealing ring 6 is sleeved on the step 201, and the sealing ring 6 is located on the side of the adhesive 5 away from the socket 3. The sealing ring 6 is made of flexible material, and its working principle is to deform the rubber ring itself by squeezing, so that the contact surface with the pipeline becomes larger. The tighter the gland is squeezed, the better the waterproof effect. Since the sealing rings are made of rubber materials, they have good elasticity and prototype recovery performance. Since they are installed in the shell, they can be used for a long time without being damaged by the environment. The sealing ring can be selected according to the purpose of the pipeline, such as nitrile rubber sealing ring: suitable for media such as petroleum hydraulic oil, ethylene glycol hydraulic oil, diester lubricating oil, gasoline, water, silicone grease, silicone oil, etc. At present, it is a multi-purpose, low-cost rubber sealing ring. However, it cannot be used for polar solvents such as ketones, ozone, nitro hydrocarbons, MEK and chloroform; EPDM rubber sealing ring: has good weather resistance, ozone resistance, water resistance and chemical resistance. It can be used for alcohols and ketones, and can also be used for sealing in high-temperature steam environments. It is suitable for sanitary equipment, automobile radiators and automobile braking systems. It is not recommended for use with food or contact with mineral oil; Neoprene rubber seal ring: It has excellent sun protection and weather resistance. It is not afraid of refrigerants such as dichlorodifluoromethane and ammonia, and is resistant to dilute acids and silicone grease lubricants, but has greater expansion in mineral oils with low aniline points. It is easy to crystallize and harden at low temperatures. It is suitable for various environments in contact with the atmosphere, sunlight, ozone, and various fire-resistant and chemical-resistant seals. It is not recommended in strong acids, nitro hydrocarbons, esters, chloroform and ketone chemicals; NR natural rubber seal ring: It has good wear resistance, elasticity, tensile strength and elongation. However, it is easy to age in the air, becomes viscous when heated, easily expands and dissolves in mineral oil or gasoline, and is resistant to alkali but not resistant to strong acids. It is suitable for liquids containing hydroxyl ions, such as automotive brake oil and ethanol.

[0038] Specifically, the outer peripheral surface of the sealing ring 6 is provided with a plurality of groove structures along the circumferential direction.

[0039] In this embodiment, the groove structure can increase the compression deformation of the sealing ring 6 and further improve the sealing performance.

[0040] Specifically, the socket 3 is provided with an abutting portion for abutting against the sealing ring 6. In this embodiment, the abutting portion can be in close contact with the sealing ring 6 to increase the sealing performance.

[0041] Specifically, the cleaning member 4 is a flexible annular structure, and the cleaning member 4 is sleeved on the socket 3. In this embodiment, the inner diameter of the cleaning member 4 is slightly smaller than the outer diameter of the socket 2, so that it can be easily pushed.

[0042] Specifically, the inner circle of the socket 3 is recessed inward to form an accommodating space 301 for accommodating the cleaning member 4. The accommodating space can wrap the cleaning member 4 so that the cleaning member 4 is evenly stressed when being pushed.

[0043] Specifically, the outer diameter of the socket 2 is matched with the inner diameter of the socket 3. In this embodiment, the socket 2 and the socket 3 are tightly matched, and the two are firmly bonded under the action of the adhesive, and the sealing is strong.

[0044] Specifically, the ends of the socket 2 and the socket 3 are respectively provided with chamfers. In this embodiment, the chamfers can increase the fault tolerance during the assembly of the socket 2 and the socket 3.

[0045] Embodiment 2:

[0046] This embodiment is similar to the embodiment 1, except that, in this embodiment, a buckle is fixed on the socket 3, and a groove corresponding to the buckle is provided on the socket 2, and the buckle is engaged with the groove.

[0047] In this embodiment, the combination of the buckle and the groove can replace manual work to simply fix the socket 2 and the socket 3 to prevent the relative movement of the socket 2 and the socket 3, so that the adhesive can be firmly bonded and the bonding reliability of the adhesive is guaranteed.

[0048] Embodiment 3:

[0049] like Figure 3 , 4 As shown in Figure 5, a connection structure of a plastic top-pull tube comprises at least the above-mentioned plastic top-pull tube, wherein the socket 2 of one of the plastic top-pull tubes is inserted into the socket 3 of another plastic top-pull tube, and the annular tube releases adhesive between the socket 2 and the socket 3 through the release hole to form a bonding layer 7.

[0050] In this embodiment, a plurality of pipe bodies 1 can be connected end to end in sequence through their respective sockets 2 and sockets 3 to complete fixation, with high connection reliability and strong pulling strength.

[0051] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0052] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A plastic top-pull tube, characterized in that: The invention comprises a pipe body (1), one end of which is provided with a socket (3), the other end of which is provided with a plug (2) adapted to the socket (3), the plug (2) being provided with a cleaning member (4) for cleaning the surface of the plug (2) and an adhesive member (5) containing glue inside, the cleaning member (4) being located on a side of the adhesive member (5) close to the socket (3).

2. A plastic top-pull tube according to claim 1, characterized in that: The cleaning member (4) is a flexible annular structure, and the cleaning member (4) is sleeved on the socket (3).

3. A plastic top-pull tube according to claim 2, characterized in that: The inner radial direction of the socket (3) is recessed inward to form an accommodating space (301) for accommodating the cleaning member (4).

4. A plastic top-drawn tube according to claim 1, characterized in that: The adhesive component (5) comprises an annular tube and an adhesive. The annular tube is sleeved on the socket (2). A cavity is formed inside the annular tube. The adhesive is accommodated in the cavity. A release hole for releasing the adhesive is provided on the annular tube.

5. A plastic top-drawn tube according to claim 4, characterized in that: The outer circumference of the socket (2) is recessed inwards to form a step (201) for accommodating the annular tube, and the annular tube is sleeved on the step (201).

6. A plastic top-drawn tube according to claim 5, characterized in that: A sealing ring (6) is sleeved on the step (201), and the sealing ring (6) is located on a side of the adhesive (5) away from the socket (3).

7. A plastic top-drawn tube according to claim 6, characterized in that: The outer peripheral surface of the sealing ring (6) is provided with a plurality of groove structures along the circumferential direction.

8. The plastic top-drawn tube according to claim 6, characterized in that: The socket (3) is provided with an abutment portion inside for abutting against the sealing ring (6).

9. The plastic top-drawn tube according to claim 1, characterized in that: A buckle is fixed on the socket (3), and a groove corresponding to the buckle is provided on the plug (2), and the buckle is engaged with the groove.

10. A connection structure of a plastic top-pull pipe, characterized in that: It comprises at least two plastic top-pull tubes as described in any one of claims 1 to 9, wherein the socket (2) of one of the plastic top-pull tubes is inserted into the socket (3) of the other plastic top-pull tube, and the adhesive (5) forms an adhesive layer (7) between the socket (2) and the socket (3).

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