Connecting interface for dragging pipes
By designing the connection interfaces of the spigot, pipe body, socket, anti-reverse ring, and flange, the problem of interface failure in the construction of drag-and-drop pipes is solved, realizing high-strength, low-cost pipe connections that are suitable for simple installation and deflection requirements on construction sites.
Patent Information
- Application Number
- CN202521876433.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2025-08-15
- Filing Date
- 2025-09-02
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2035-09-02
AI Technical Summary
Existing pipe connection interfaces are prone to failure during construction, causing adjacent pipes to detach, reducing construction efficiency and increasing costs, and requiring high levels of technical expertise from installation equipment and personnel.
A connection interface including a spigot, pipe body, socket, anti-reverse ring, elastic element and flange is designed, which allows adjacent pipes to deflect and transmits thrust through the structure of anti-reverse ring and flange, simplifying the installation process and improving the strength and reliability of the interface.
It reduces the probability of interface detachment during construction, improves construction efficiency, reduces costs, is suitable for simple installation on construction sites, and can adapt to the deflection requirements of adjacent pipes.
Smart Images
Figure CN223460078U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to pipe material technical field, concretely is a kind of connection interface of pipe material is dragged. BACKGROUND
[0002] The existing city ground building, road and other construction are more perfect, when installing pipe material is needed in the construction and maintenance of water supply and drainage pipe network and other systems, non-excavation means is very necessary.Non-excavation refers to the construction new technology of laying, replacing and repairing various underground pipelines by using various rock and soil drilling equipment and technical means, through guiding, directional drilling and other ways in the case of very small part of surface excavation (generally refers to the small area excavation of inlet and outlet), laying, replacing and repairing various underground pipelines.Towing pipe technology is a non-excavation underground pipeline laying method, and its core process includes: drilling hole according to design trajectory by using guide drill bit, expanding hole diameter by expansion drill gradually, and finally connecting pipe material to the tail of expansion drill and towing into hole, and then connecting pipe material into hole one by one.When connecting adjacent pipe materials, the structure of pipe material itself needs to be used to form connection interface with other components to realize the connection of adjacent pipe materials.However, if the connection interface fails during towing, the adjacent pipe materials will be disconnected, and the pipe material already towed into hole needs to be pulled out again, and then the pipe material needs to be connected again and start towing from the beginning, which obviously greatly reduces the construction efficiency and increases the construction cost.In addition, the connection of adjacent pipe materials is carried out and completed on site, and the technical level of on-site equipment and construction personnel is limited, so it is better to make the connection of adjacent pipe materials simple. CONTENT OF UTILITY MODEL
[0003] In view of the above problems existing in the prior art, the utility model aims at providing a connection interface for towing pipe material, which can realize the towing of pipe material one by one, allow the deflection between adjacent pipe materials, and the components needed by the connection interface are simple, easy to install, the overall cost is low, the interface strength is high, the probability of rework caused by interface disconnection during construction process is greatly reduced, the requirement for installation equipment and personnel technical level is low, and it is suitable for installation on construction site.
[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0005] A connecting interface of pipe dragging, comprising a socket, a pipe body and a spigot, the socket is coaxially connected to one end of the pipe body, the socket is inserted into the spigot, the outer diameter of the socket is larger than the outer diameter of the pipe body, the connecting interface further comprises a retainer ring, an elastic member, at least two first half-flange pieces and at least two second half-flange pieces, the retainer ring is movably sleeved on the outer wall of the pipe body and located in the spigot, the elastic member is compressed between the inner wall of the spigot and the retainer ring, each first half-flange piece is spliced into a ring shape and covers the end face of the spigot, each second half-flange piece covers each splicing gap, the splicing gap is the splicing position of the adjacent two first half-flange pieces, the first half-flange piece exceeds the inner wall of the end face of the spigot in the radial direction of the spigot to the end face of the end of the first half-flange piece away from the socket, so that the first half-flange piece, the retainer ring and the socket are sequentially contacted to transmit the axial thrust force, and the adjacent pipes are sequentially dragged.
[0006] As a further improvement of the above technical solution:
[0007] The inner wall of the spigot is sequentially provided with a first avoiding groove, a blocking part, a sealing groove and a second avoiding groove from the end face to the direction away from the end face of the spigot, the first avoiding groove is used for avoiding the retainer ring, so that after the socket is inserted into the spigot, the retainer ring can enter the first avoiding groove, the inner diameter of the spigot at the first avoiding groove, the outer diameter of the retainer ring, the inner diameter of the spigot at the blocking part, the outer diameter of the socket are sequentially reduced, and the inner diameter of the spigot at the sealing groove, the inner diameter of the spigot at the second avoiding groove and the inner diameter of the socket are sequentially reduced.
[0008] The inner diameter of the retainer ring is not less than the outer diameter of the pipe body and less than the outer diameter of the socket.
[0009] When the socket and the spigot are coaxial, neither the first half-flange piece nor the second half-flange piece contacts the outer wall of the pipe body.
[0010] The width of the retainer ring is not greater than the width of the first avoiding groove, the width of the retainer ring refers to the axial dimension of the retainer ring, and the width of the first avoiding groove refers to the dimension of the first avoiding groove in the axial direction of the spigot.
[0011] Neither the first half-flange piece nor the second half-flange piece exceeds the outer wall of the spigot in the radial direction of the spigot.
[0012] The connecting interface further comprises a plurality of fasteners, the fasteners sequentially pass through the second half-flange piece and the first half-flange piece and are inserted into the spigot from the end face of the spigot at the part where the first half-flange piece and the second half-flange piece are stacked, and the fasteners pass through the first half-flange piece and are inserted into the spigot from the end face of the spigot at the part not covered by the second half-flange piece.
[0013] The spigot is provided with a plurality of fastening holes which are blind holes for inserting the fasteners, and the fastening holes are formed by being concave from the end face of the spigot.
[0014] The adjacent two pipes can be relatively deflected, when the maximum deflection angle is α, the inner diameter d1 of the socket at the blocking part, the half of the difference h between the outer diameter and the inner diameter of the retainer ring should meet the following requirements:
[0015] ;
[0016] ;
[0017] Wherein, D1 is the outer diameter of the socket, d2 is the minimum inner diameter of the socket at the second avoiding groove, t2 is the axial distance between the connection of the sealing groove and the second avoiding groove and the hole bottom of the fastening hole, L1 is the length of the fastening hole, b is the size of the retainer ring in the direction parallel to the central axis, D2 is the outer diameter of the pipe body.
[0018] The beneficial effects of the utility model are:
[0019] (1) the first half flange piece, the retainer ring and the socket contact and transmit force in turn, realize the pipe material is dragged in turn, the socket is part of the pipe body, the strength is big, the force is finally transmitted to the pipe body, thereby improve the strength and reliability of the connection interface as a whole. In addition, the end surface area of the retainer ring is greater than the radial end surface area of the step formed by the socket protruding from the pipe body, so that the contact area of the first half flange piece and the retainer ring is larger than the contact area of the first half flange piece and the step, under the same thrust of the first half flange piece, the pressure on the retainer ring is smaller, which helps to improve the use reliability of the connection interface. In addition, the outer diameter of the socket is smaller than the outer diameter of the retainer ring, which means that the socket contacts a part of the end surface of the retainer ring close to the central axis, which means that the part of the retainer ring close to the central axis is counterweighted. When the adjacent two pipes are relatively deflected, the step makes the torque required for the retainer ring to rotate larger, thereby making the retainer ring more stable and not easy to come out of the set position.
[0020] (2) the second half flange piece is stacked on the first half flange piece and covers the gap between the adjacent two first half flange pieces, which greatly improves the strength of the second half flange piece and the first half flange piece as a whole.
[0021] (3) the second half flange piece and the first half flange piece have gaps between them and the coaxial pipe body, there are gaps between the socket and the socket outside the sealing ring, the retainer ring is movably sleeved on the pipe body, and the elastic member is sleeved outside the retainer ring. These designs allow the adjacent pipes to be deflected, allowing the pipes to be deflected under external factors during construction and use, improving the flexibility and applicability of the pipes.
[0022] (4) the inner diameter of the retreat ring is not less than the outer diameter of the pipe body, and the movable sleeve is connected to the outer of the pipe body, and can move and / or rotate relative to the pipe body within a certain range, and has a certain flexibility, so as to better adapt to the relative deflection of the two adjacent pipes, in addition, the elastic element is sleeved outside the retreat ring, so as to ensure the flexibility of the retreat ring and the overall stability of the retreat ring.
[0023] (5) the second half flange piece and the first half flange piece do not exceed the outer wall of the socket in the radial direction, and will not be subjected to forward resistance in the construction process, and the second half flange piece and the first half flange piece can be subjected to other external forces to the maximum extent; the blind hole of the fastener inserted into the socket will not be subjected to the resistance of the pipe material in the construction process because of passing through the socket.
[0024] (6) the connecting interface needs simple components, simple installation, low overall cost, high interface strength, greatly reduces the probability of rework caused by interface disconnection in the construction process, has low requirements on installation equipment and personnel technical level, and is suitable for installation on the construction site. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 is a pipe structure schematic view of one embodiment of the utility model.
[0026] Figure 2 is a connecting interface schematic view of one embodiment of the utility model.
[0027] Figure 3 is another view structure schematic view of Figure 2 .
[0028] Figure 4 is a schematic view when the socket and the socket of the connecting interface of one embodiment of the utility model are relatively deflected.
[0029] Figure 5 is a socket end size schematic view of one embodiment of the utility model.
[0030] Figure 6 is an enlarged schematic view of F1 of Figure 4 .
[0031] Figure 7 is an enlarged schematic view of F2 of Figure 4 .
[0032] Figure 8 is an enlarged schematic view of F3 of Figure 4 .
[0033] Reference: 1, socket, 2, socket, 21, first avoiding slot, 22, blocking part, 23, sealing groove, 24, fastening hole, 25, second avoiding slot, 3, pipe body, 4, retainer ring, 5, elastic piece, 6, first half flange piece, 7, second half flange piece, 8, fastener, 9, sealing ring, 10, washer, 11, socket reinforcing ring. DETAILED DESCRIPTION
[0034] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.
[0035] For ease of description, spatial relative terms such as "above", "upper", "top", "top", etc. can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "above" other devices or structures will be positioned "below" or "below" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.
[0036] A connecting interface of a pipe, as shown in Figure 1 The pipe is a socket pipe, comprising a socket 1, a pipe body 3 and a socket 2 connected coaxially in sequence.
[0037] The outer diameter of the socket 1 is greater than the outer diameter of the pipe body 3, so that the socket 1 protrudes from the outer surface of the pipe body 3 to form a stepped structure. The end face of the socket 1 away from the pipe body 3 is the end face of the socket 1, and the end face or side face of the socket 1 connected to the pipe body 3 is a stepped face, that is, the stepped face is formed by the socket 1 protruding from the surface of the pipe body 3, and the plane where the stepped face is located is parallel to the radial direction of the socket 1.
[0038] The socket 1 is sleeved with a socket reinforcing ring 11 for enhancing the strength of the socket 1. The socket reinforcing ring 11 can be integrally arranged with the socket 1, which is equivalent to that the socket 1 and the socket reinforcing ring 11 are two layers of metal with the same or different materials, or the socket reinforcing ring 11 can be separately arranged. When the socket reinforcing ring 11 is separately arranged, the socket reinforcing ring 11 is annular, generally made of stainless steel, and has certain ductility and rigidity. The initial outer diameter of the socket reinforcing ring 11 is smaller than the inner diameter of the socket 1. When the socket reinforcing ring 11 is installed, the socket reinforcing ring 11 is placed into the socket 1, and then the socket reinforcing ring 11 is expanded in diameter by using an expanding device, so that the diameter of the socket reinforcing ring 11 is expanded until the socket reinforcing ring 11 is tightly pressed against the inner wall of the socket 1. The reason why the socket reinforcing ring 11 can be tightly pressed against the inner wall of the socket 1 is that, when the diameter is expanded, the inner wall of the socket 1 will be subjected to the radial pressure of the expanding device. After the pressure is removed (the expanding is completed), the socket 1 and the socket reinforcing ring 11 will have certain elastic recovery. Since the wall thickness of the socket 1 is large and the socket 1 is connected with the pipe body, the elastic recovery of the socket 1 is larger than that of the socket reinforcing ring 11. After the elastic recovery, the socket reinforcing ring 11 is tightly pressed against the inner wall of the socket 1.
[0039] When two adjacent pipes are connected, the socket 1 of one pipe is inserted into the spigot 2 of the other pipe, and in combination with other auxiliary components, the connection interface is formed.
[0040] The connection interface includes the socket 1, the pipe body 3, the spigot 2, the retainer ring 4, the elastic component 5, the first half flange piece 6, the second half flange piece 7, the fastener 8, the sealing ring 9, the gasket 10 and the socket reinforcing ring 11. Figure 2 3 The socket 1 is coaxially connected to one end of the pipe body 3. The socket 1 and the spigot 2 of the connection interface are the socket 1 and the spigot 2 of two adjacent pipes, respectively, and the socket 1 is inserted into the spigot 2.
[0041] The retainer ring 4 is annular in structure and made of metal. The retainer ring 4 is movably sleeved outside the pipe body 3 and located in the spigot 2. The inner diameter of the retainer ring 4 is not less than the outer diameter of the pipe body 3 and is smaller than the outer diameter of the socket 1. The outer diameter of the retainer ring 4 is larger than the outer diameter of the socket 1.
[0042] The retainer ring 4 contacts the stepped surface of the socket 1 and protrudes from the outer surface of the socket 1. The outer surface of the socket 1 refers to the curved outer wall of the socket 1. Specifically, one end surface of the retainer ring 4 contacts the stepped surface of the socket 1.
[0043] The retainer ring 4 contacts the stepped surface of the socket 1 and protrudes from the outer surface of the socket 1. The outer surface of the socket 1 refers to the curved outer wall of the socket 1. Specifically, one end surface of the retainer ring 4 contacts the stepped surface of the socket 1.
[0044] The inner wall of the socket 2 of the same pipe is provided with a first avoiding groove 21, a blocking part 22, a sealing groove 23 and a second avoiding groove 25 in sequence from the end face to the pipe body 3. The first avoiding groove 21, the sealing groove 23 and the second avoiding groove 25 are all grooves provided on the inner wall of the socket 2, i.e. concave from the inner wall of the socket 2, and the blocking part 22 is a part without concave. Each groove is a groove along a circumference of the inner wall of the socket 2. The inner diameter of the socket 2 at the sealing groove 23, the inner diameter of the socket 2 at the second avoiding groove 25 and the inner diameter of the pipe body 3 are in sequence decreasing. The inner diameter of the socket 2 at the first avoiding groove 21 is greater than the inner diameter of the socket 2 at the blocking part 22, the inner diameter of the socket 2 at the sealing groove 23 is greater than the inner diameter of the socket 2 at the blocking part 22, and the inner diameter of the socket 2 at the second avoiding groove 25 is not less than the inner diameter of the socket 2 at the blocking part 22. The inner diameter of the socket 2 at the first avoiding groove 21, the outer diameter of the stop ring 4 and the inner diameter of the socket 2 at the blocking part 22 are in sequence decreasing. The first avoiding groove 21 is used for avoiding the stop ring 4, so that the stop ring 4 can enter the first avoiding groove 21 after the spigot 1 is inserted into the socket 2. The sealing groove 23 is used for installing the sealing ring 9 to realize sealing after the connection of two adjacent pipes, and the sealing groove 23 is compressed between the spigot 1 and the socket 2. The inner diameters of the socket 2 at the second avoiding groove 25 can not be completely equal. Specifically, the inner diameters of the socket 2 at the second avoiding groove 25 gradually increase from the end face of the socket 2 to the direction away from the end face of the socket 2.
[0045] The elastic member 5 is located in the first avoiding groove 21, and the elastic member 5 is compressed between the socket 2 and the stop ring 4. That is, the elastic member 5 is sleeved outside the stop ring 4 and inside the socket 2.
[0046] In the embodiment, the elastic member 5 is a rubber ring.
[0047] The first half flange piece 6 and the second half flange piece 7 are both arc-shaped structures. The first half flange piece 6 is provided with at least two, and the second half flange piece 7 is also provided with at least two. Each first half flange piece 6 is sequentially spliced into a circular ring to cover the end face of the socket 2, and each second half flange piece 7 covers a splicing gap of each first half flange piece 6. In other words, the second half flange piece 7 does not need to cover the entire first half flange piece 6, but only needs to cover the splicing gap of the adjacent two first half flange pieces 6. All the second half flange pieces 7 are on the same ring.
[0048] The above-mentioned arrangement of the first half flange piece 6 and the second half flange piece 7 improves the overall connection strength and reliability of the two, and maximally reduces the probability of failure of the first half flange piece 6 and the second half flange piece 7 falling off during construction.
[0049] The first half flange sheet 6 and the second half flange sheet 7 both exceed the inner wall of the end face of the socket 2 in the radial direction of the socket 2 to the end face of the one end of the stop ring 4 away from the spigot 1, that is, the annular inner diameter formed by splicing each first half flange sheet 6 and the annular inner diameter where the second half flange sheet 7 is located are both smaller than the inner diameter of the end face of the socket 2 and the outer diameter of the stop ring 4. Specifically, the side of the first half flange sheet 6 away from the second half flange sheet 7 contacts the end face of the one end of the stop ring 4 away from the spigot 1, which is equivalent to the first half flange sheet 6 being blocked by the stop ring 4, and the stop ring 4 being blocked by the step formed by the protruding pipe body 3 surface of the spigot 1, so that the first half flange sheet 6, the stop ring 4 and the spigot 1 can be in contact and transmit the pushing force in sequence, the pushing force is an axial pushing force, and the adjacent pipes are sequentially pulled in the axial direction.
[0050] When the spigot 1 and the socket 2 are coaxial, the first half flange sheet 6 and the second half flange sheet 7 do not contact the outer wall of the pipe body 3, that is, the annular inner diameter formed by splicing each first half flange sheet 6 or the annular inner diameter where the second half flange sheet 7 is located is greater than the outer diameter of the pipe body 3. The width of the stop ring 4 is not greater than the width of the first avoiding slot 21, the width of the stop ring 4 refers to the axial dimension of the stop ring 4, and the width of the first avoiding slot 21 refers to the dimension of the first avoiding slot 21 in the axial direction of the socket 2. The minimum inner diameter of the socket 2 is greater than the outer diameter of the spigot 1. That is, when the spigot 1 and the socket 2 are coaxial, there is a gap between the first half flange sheet 6 and the second half flange sheet 7 and the pipe body 3, there is a gap between the spigot 1 and the socket 2, there is a gap between the wall surface of the stop ring 4 and the first avoiding slot 21, and there is a gap between the stop ring 4 and the pipe body 3 (when the inner diameter of the stop ring 4 is greater than the outer diameter of the pipe body 3), which allows the relative deflection of the adjacent two pipes to adapt to the relative deflection of the adjacent two pipes caused by external force factors in the pipe construction process or use process. For example Figure 4 The dashed line shown in the figure indicates the position state of the spigot 1 and the pipe body 3 after the pipe where the spigot 1 is located deflects clockwise relative to the pipe where the socket 2 is located, and the state after counterclockwise deflection is axially symmetrical.
[0051] The first half flange sheet 6 and the second half flange sheet 7 do not exceed the outer wall of the socket 2 in the radial direction of the socket 2, that is, the annular outer diameter formed by splicing each first half flange sheet 6 and the annular outer diameter where the second half flange sheet 7 is located are both smaller than or equal to the outer diameter of the end face of the socket 2. In this way, during the construction process, the first half flange sheet 6 and the second half flange sheet 7 will not be subjected to the forward resistance of the surrounding soil in the channel, thereby greatly reducing the external force acting on the first half flange sheet 6 and the second half flange sheet 7 and improving the reliability thereof.
[0052] In the embodiment, two first half flange sheets 6 and two second half flange sheets 7 are provided.
[0053] The fasteners 8 are arranged in a plurality, and the first half flange 6 and the second half flange 7 are fixed on the socket 2 by the fasteners 8. The fasteners 8 are arranged on the same circle in intervals. In the part where the first half flange 6 and the second half flange 7 are stacked, the fasteners 8 are inserted into the socket 2 from the end surface of the socket 2 after passing through the second half flange 7 and the first half flange 6 in sequence, and in the part not covered by the second half flange 7, the fasteners 8 are inserted into the socket 2 from the end surface of the socket 2 after passing through the first half flange 6.
[0054] Further, the socket 2 is provided with fastening holes 24 for inserting the fasteners 8, which are blind holes formed in the end surface of the socket 2. One fastener 8 is inserted into each fastening hole 24. The fasteners 8 do not protrude out of the socket 2 to the outside, avoiding the fasteners 8 from being subjected to the advancing resistance in the construction process.
[0055] In the embodiment, the fasteners 8 are bolts, and a gasket 10 is arranged between the head of the fastener 8 and the first half flange 6 or the second half flange 7.
[0056] In the embodiment, the fasteners 8 are arranged in 12.
[0057] In the embodiment, the outer surface of the socket 2 is a smooth connection and transition surface, and the outer diameter of the socket 2 gradually increases in the direction from the pipe body 3 to the socket 2.
[0058] When two adjacent pipes are installed, the sealing ring 9 is sleeved in the sealing groove 23 of the socket 2 of the first pipe, and the elastic member 5 is sleeved in the first avoiding groove 21, the stop ring 4 is installed on the outer surface of the pipe body 3 of the second pipe, and when the stop ring 4 is installed, the two arc structures are sleeved on the outer surface of the pipe body 3, and then the two arc structures are welded to form the annular stop ring 4. Then, the spigot 1 of the second pipe is sleeved into the socket 2 of the first pipe, the stop ring 4 enters the socket 2 to contact the spigot 1, and the elastic member 5 is compressed between the stop ring 4 and the inner wall of the first avoiding groove 21. Then, the first half flange 6 and the second half flange 7 are installed by the fasteners 8, and the installation of the connection interface is completed.
[0059] The deflection angle is the angle of relative deflection of two adjacent pipes, and when the deflection angle of two adjacent pipes is the maximum, the first half flange 6 and the second half flange 7 of the connection interface both contact the pipe body 3, and the spigot 1 contacts the socket 2 at the inner wall corresponding to the second avoiding groove 25. Specifically, in the cross section shown in Figure 4 and 5 When the pipe where the spigot 1 is located is deflected clockwise to the maximum deflection angle a relative to the pipe where the socket 2 is located, as shown in Figure 6As shown, the end of the inner wall of the second half flange 7 away from the first half flange 6 contacts the pipe body 3 after deflection, the contact point being O1, the end of the inner wall of the first half flange 6 close to the second half flange 7 contacts the pipe body 3, the contact point being O2, the contact point of the inner wall of the second half flange 7 and the first half flange 6 being O3, obviously, the points O1, O2 and O3 are located at the three vertices of a right triangle respectively, and wherein, L 23 is the distance between the points O2 and O3, L 13 is the distance between the points O1 and O3 (i.e. the thickness of the second half flange 7 or the dimension parallel to the axial direction of the pipe). The socket 1 contacts the inner wall of the socket 2 at the position of the minimum inner diameter of the second relief groove 25.
[0060] For the convenience of description, it is assumed that the central axes of two adjacent pipes coincide before deflection, and the first half flange 6, the retainer ring 4 and the socket 1 contact in sequence; the central axes of two adjacent pipes intersect after deflection, as shown in Figure 4 In order to make the maximum deflection angle of the two adjacent pipes reach α, the inner diameter d1 of the socket 2 at the blocking portion 22, the half of the difference between the outer diameter and the inner diameter of the retainer ring 4 h should satisfy the following requirements:
[0061] (1);
[0062] (2);
[0063] wherein, D1 is the outer diameter of the socket 1, as shown in Figure 7 h4 is the maximum radial movement distance of the step at the connection between the socket 1 and the pipe body 3 before and after deflection, and h0 is the maximum radial distance between the inner wall of the retainer ring 4 and the inner wall of the socket 2 at the blocking portion 22 after deflection, as shown in Figure 8
[0064] The above inequality (1) shows that the inner diameter of the socket 2 at the blocking portion 22 is sufficient to meet the radial displacement of the socket 1 and does not interfere with the movement of the socket 1. The above inequality (2) shows that the height of the retainer ring 4 (the half of the difference between the outer diameter and the inner diameter h) is sufficient, and the retainer ring 4 is still clamped between the first half flange 6 and the blocking portion 22 after deflection, and the retainer ring 4 will not be pulled out from the connection between the first relief groove 21 and the blocking portion 22 due to the too small height after deflection.
[0065] Based on the above inequalities (1), (2) and the geometric relationship before and after deflection of the pipe, it is obtained that:
[0066] (3);
[0067] (4);
[0068] Wherein, d2 is the minimum inner diameter of the socket 2 at the second escape groove 25, t2 is the axial (parallel to the direction of the center axis of the pipe) distance between the connection of the sealing groove 23 and the second escape groove 25 and the hole bottom of the fastening hole 24, L1 is the length of the fastening hole 24, i.e. the size of the fastening hole 24 in the direction parallel to the center axis of the pipe, b is the width of the retainer ring 4, i.e. the size of the retainer ring 4 in the direction parallel to the center axis, and D2 is the outer diameter of the pipe body 3.
[0069] It should be noted that the above relationship does not limit the specific values of each parameter, and the specific values of each parameter can be selected and calculated according to the use occasion, but it needs to meet the above relationship. For example, the outer diameter of the socket 1 and the pipe body 3 is selected according to the use requirement, and the width b of the retainer ring 4 is calculated by allowing the pulling force and the allowable stress of the pipe.
[0070] Finally, it is necessary to point out that the above examples are only used to further illustrate the technical scheme of the present application, and cannot be understood as limiting the protection scope of the present application. Some non-essential improvements and adjustments made by the skilled in the art according to the above content of the present application all belong to the protection scope of the present application.
Claims
1. A connecting interface of a pipe, comprising a spigot (1), a pipe body (3) and a socket (2), the spigot (1) being coaxially connected to one end of the pipe body (3), the spigot (1) being inserted into the socket (2), characterized in that, The outer diameter of the socket (1) is greater than the outer diameter of the pipe body (3), the connecting interface further comprises a retreat-stop ring (4), an elastic member (5), at least two arc-shaped first half-flange pieces (6), and at least two arc-shaped second half-flange pieces (7), the retreat-stop ring (4) is movably sleeved on the outside of the pipe body (3) and located in the socket (2), the elastic member (5) is compressed between the inner wall of the socket (2) and the retreat-stop ring (4), each first half-flange piece (6) is spliced into a ring shape and covers the end face of the socket (2), and each second half-flange piece (7) covers each splicing gap, the splicing gap is the splicing position of the adjacent two first half-flange pieces (6), the first half-flange piece (6) exceeds the inner wall of the end face of the socket (2) in the radial direction of the socket (2) to the end face of the first half-flange piece (6) away from the socket (1), so that the first half-flange piece (6), the retreat-stop ring (4) and the socket (1) are sequentially contacted to be able to transmit a pushing force, the pushing force is an axial pushing force, and the adjacent pipes are sequentially pulled.
2. The connection interface of claim 1, wherein: The inner wall of the socket (2) is sequentially provided with a first avoiding groove (21), a blocking part (22), a sealing groove (23) and a second avoiding groove (25) from the end face to the direction away from the end face of the socket (2), the first avoiding groove (21) is used for avoiding the retreat-stop ring (4), so that after the socket (1) is inserted into the socket (2), the retreat-stop ring (4) can enter the first avoiding groove (21), the inner diameter of the socket (2) at the first avoiding groove (21), the outer diameter of the retreat-stop ring (4), the inner diameter of the socket (2) at the blocking part (22), and the outer diameter of the socket (1) sequentially decrease, and the inner diameter of the socket (2) at the sealing groove (23), the inner diameter of the socket (2) at the second avoiding groove (25) and the inner diameter of the socket (1) sequentially decrease.
3. The connection interface of claim 2, wherein: The inner diameter of the retreat-stop ring (4) is not less than the outer diameter of the pipe body (3) and is less than the outer diameter of the socket (1).
4. The connection interface of claim 2, wherein: When the socket (1) and the socket (2) are coaxial, neither the first half-flange piece (6) nor the second half-flange piece (7) contacts the outer wall of the pipe body (3).
5. The connection interface of claim 2, wherein: The width of the retreat-stop ring (4) is not greater than the width of the first avoiding groove (21), the width of the retreat-stop ring (4) refers to the axial dimension of the retreat-stop ring (4), and the width of the first avoiding groove (21) refers to the axial dimension of the first avoiding groove (21) in the socket (2).
6. The connection interface of claim 1, wherein: Neither the first half-flange piece (6) nor the second half-flange piece (7) exceeds the outer wall of the socket (2) in the radial direction of the socket (2).
7. The connection interface of claim 2 or 6, wherein: The connecting interface further comprises a plurality of fasteners (8), in the part where the first half-flange piece (6) and the second half-flange piece (7) are stacked, the fastener (8) is sequentially inserted into the socket (2) from the end face of the socket (2) after passing through the second half-flange piece (7) and the first half-flange piece (6), and in the part not covered by the second half-flange piece (7), the fastener (8) is inserted into the socket (2) from the end face of the socket (2) after passing through the first half-flange piece (6).
8. The connection interface of claim 7, wherein: The socket (2) is provided with a fastening hole (24) for inserting the fastener (8), the fastening hole (24) is formed by being concave from the end face of the socket (2).
9. The connection interface of claim 8, wherein: When the maximum deflection angle is α, the inner diameter d1 of the socket (2) at the blocking part (22), and the half of the difference h between the outer diameter and the inner diameter of the stop ring (4) should meet the following requirements: ； ； Wherein, D1 is the outer diameter of the socket (1), d2 is the minimum inner diameter of the socket (2) at the second avoiding groove (25), t2 is the axial distance between the connection of the sealing groove (23) and the second avoiding groove (25) and the hole bottom of the fastening hole (24), L1 is the length of the fastening hole (24), b is the size of the stop ring (4) in the direction parallel to the central axis, and D2 is the outer diameter of the pipe body (3).