PSP steel-plastic composite adapter pipe fitting

Abstract

The utility model relates to the technical field of adapter pipe fittings, in particular to a PSP steel-plastic composite adapter pipe fitting which comprises a flange assembly and a connecting assembly, the flange assembly comprises two symmetrical flange plates, flange bolts are arranged in through holes in one of the flange plates, the connecting assembly comprises a connector body and a nut connected with the connector body, and the flange bolts are connected with the connector body. Detachable clamping sleeves are arranged between the joint bodies and the nuts; according to the connecting assembly, the nut, the clamping sleeve and the connector body are matched through the first inclined face, the second inclined face, the first inclined groove and the second inclined groove, the nut is matched with the threads on the connector body, it is guaranteed that the clamping sleeve is accurately installed in place, and the clamping sleeve shrinks inwards in the installation process; according to the flange assembly, firm sealing connection is formed, reliability and stability of connection are improved, the multiple flange bolts are matched with the flange nuts, tightness and stability of connection between the flange assembly and the connecting assembly are improved, and separation or rotation of connecting parts is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of adapter pipe fitting, specifically to a PSP steel plastic composite adapter pipe fitting. BACKGROUND

[0002] The PSP steel plastic composite pipe ingeniously combines the high strength of the steel pipe with the corrosion resistance and wear resistance of the plastic, has good mechanical properties, can effectively prevent corrosion, greatly prolongs the service life of the pipe material, and along with the increasing performance requirements of the pipeline system in the fields of construction, municipal administration and industry, the demand for high-quality pipe materials is increasing in the market.

[0003] The utility model with publication number CN216408045U discloses a water pipe connecting structure, which comprises a pipe joint one and a pipe joint two, and the water pipe connecting structure comprises an arc-shaped sheet, the arc-shaped sheet can be clamped at the connection of the pipe joint one and the pipe joint two through elastic deformation; the arc-shaped sheet is provided with a clamping hole extending along the arc length direction, and the pipe joint one and the pipe joint two are provided with clamping pieces; when the arc-shaped sheet is clamped at the connection of the pipe joint one and the pipe joint two, the clamping pieces of the pipe joint one and the pipe joint two extend into the clamping hole and are inseparably close together to block the separation of the pipe joint one and the pipe joint two.

[0004] In the above technical scheme, the entire dismounting process of the water pipe connecting structure only needs to clamp the arc-shaped sheet into the connection of the pipe joint one and the pipe joint two or take the pipe joint one and the pipe joint two out of the arc-shaped sheet, without the need for any tool; however, the arc-shaped sheet mainly relies on its elastic deformation to clamp the pipe joint, and when a large axial tension is applied, the cooperation between the clamping pieces and the clamping hole may not provide sufficient resistance, which easily leads to the separation of the pipe joint one and the pipe joint two, and when the pipeline is subjected to a torsional force, the structure of the arc-shaped sheet may not effectively resist, which easily causes the relative rotation between the pipe joints, damages the sealing of the connection, affects the normal use of the water pipe, and the clamping mode of the arc-shaped sheet may not effectively prevent the leakage of the medium in the pipe as the traditional sealed connection, especially when conveying liquid or gas under pressure. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a PSP steel plastic composite adapter pipe fitting to solve the problems in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The utility model provides a PSP steel plastic composite adapter pipe fitting, which comprises a connecting short pipe, flange assemblies symmetrically arranged at two ends of the connecting short pipe, and a connecting assembly in the flange assemblies, wherein the flange assemblies comprise two symmetrical flange plates, a plurality of through holes are formed in each of the flange plates, a flange bolt is arranged in each of the through holes of one of the flange plates, and a corresponding flange nut is arranged at the end of the flange bolt; the connecting assembly comprises a joint body and a nut connected to the joint body, and a detachable sleeve is arranged between the joint body and the nut.

[0008] Preferably, the through holes in the flange plates are annularly and equidistantly distributed, the flange bolts sequentially pass through the through holes on the same axis of the two flange plates, and the flange bolts are threadedly connected with the flange nuts.

[0009] In the utility model, the force generated by the plurality of flange bolts can uniformly act on the flange plates when the flange nuts are tightened, thereby increasing the tightness and stability of the connection between the flange assemblies and the connecting assembly.

[0010] Preferably, a first inclined groove is arranged at the left end of the inner side of the nut, an internal thread is arranged at the right end of the inner side of the nut, a first inclined surface, an inner blade and a second inclined surface are sequentially arranged on the inner side of the sleeve from left to right, and the first inclined surface is matched with the first inclined groove.

[0011] In the utility model, the first inclined surface is matched with the first inclined groove, the first inclined surface of the sleeve slides along the first inclined groove of the nut during installation, the accurate installation of the sleeve is further ensured, and the contact area between the sleeve and the nut is increased.

[0012] Preferably, a second inclined groove is arranged at the left side of the inner side of the joint body, an interface is arranged at the middle of the inner side of the joint body, and a threaded column is arranged at the outer circle of the left joint.

[0013] In the utility model, the second inclined groove is matched with the second inclined surface, the internal thread of the nut is matched and connected with the external thread of the joint body, and during installation, the second inclined surface of the sleeve slides along the second inclined groove in the joint body under the cooperation of the first inclined groove and the first inclined surface, and the second inclined groove extrudes the second inclined surface during the sliding process, so that the sleeve is inwardly contracted.

[0014] Preferably, a pipeline is arranged on the inner side of the connecting assembly, a pipeline groove is arranged on the outer wall of the right end of the pipeline, the end of the pipeline penetrates the left flange plate, the nut, the sleeve and the interface in sequence, and the pipeline groove is clamped with the inner blade.

[0015] In the utility model, the end of the pipeline is connected with the interface, the sleeve is extruded when the nut is tightened, the inner blade is embedded in the pipeline groove, a sealed connection is formed, and the reliability and stability of the connection between the pipeline and the connecting assembly are improved.

[0016] Preferably, the connecting short pipe is internally provided with a check plate, the check plate is combined by two movable petals and a positioning column, and the two movable petals are rotationally connected with the positioning column through torsional springs on the left side and are provided with limiting protrusions on the right side.

[0017] In the utility model, the movable petals are quickly closed through the torsional springs, the sealing property of the check plate is increased, the opening position of the movable petals is limited by the limiting protrusions, and one-way conveying is realized.

[0018] Compared with the prior art, the utility model has the advantages that:

[0019] 1. The nut, the sleeve and the joint body in the connecting assembly are matched through the first and second inclined surfaces and the first and second inclined grooves, the matching of the threads on the nut and the joint body, the sleeve is accurately installed in place and is inwards retracted during the installation process, when the nut is tightened, the inner blade of the sleeve is embedded into the pipeline groove of the pipeline, a firm sealing connection is formed, the reliability and stability of the connection are improved, the tensile strength and the torsional resistance are enhanced, the plurality of flange bolts are matched with the flange nuts, the tightness and stability of the connection between the flange assembly and the connecting assembly are increased, and the connection part is prevented from separating or rotating.

[0020] 2. The check plate arranged in the connecting short pipe, the torsional spring on the left side can ensure that the check plate is quickly closed when the fluid pressure disappears or appears a reverse flow trend, the sealing property of the check plate is increased, the fluid reverse flow is prevented, the limiting protrusion on the right side limits the opening position of the check plate, the check plate is stably operated in the normal working range, and the safety and stability of the pipeline system are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structure schematic view of the adapter pipe fitting of the utility model;

[0022] Figure 2 It is a split structure schematic view of the adapter pipe fitting of the utility model;

[0023] Figure 3 It is a cross section structure schematic view of the adapter pipe fitting of the utility model;

[0024] Figure 4 It is an enlarged structure schematic view of A part in the utility model; Figure 2

[0025] Figure 5 It is an enlarged structure schematic view of B part in the utility model; Figure 3

[0026] Figure 6 It is an enlarged structure schematic view of C part in the utility model; Figure 3 ​​​

[0027] Figure 7 The utility model discloses a D part amplification structure schematic diagram for the utility model Figure 3 .

[0028] The meaning of each reference sign in the drawing is as follows:

[0029] 1, pipeline;11, pipeline groove;

[0030] 2, flange assembly;21, flange disc;22, flange bolt;23, flange nut;

[0031] 3, connecting assembly;31, nut;311, first inclined groove;32, clamping sleeve;321, inner blade;322, first inclined surface;323, second inclined surface; 33, joint body;331, second inclined groove;332, interface;

[0032] 4, connecting short pipe;41, check plate;411, movable flap;412, torsion spring. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the utility model.

[0034] Please refer to Figures 1-7 , the embodiment provides a kind of technical scheme:

[0035] A kind of PSP steel plastic composite adapter pipe, including connecting short pipe 4 and the flange assembly 2 that is symmetrically equipped with at both ends of connecting short pipe 4, and the connecting assembly 3 in the inside of flange assembly 2 described connecting short pipe 4, inside is equipped with check plate 41, the check plate 41 is combined into by two movable flaps 411 and positioning column, and two movable flaps 411 left side is rotatably connected with positioning column by torsion spring 412, right side is equipped with limiting lug.

[0036] In the utility model, the movable flap 411 is realized quickly closed by setting torsion spring 412, the sealing property of check plate 41 is increased, the opening position of movable flap 411 is limited by limiting lug, and then one-way conveying is realized.

[0037] The flange assembly 2 comprises two symmetrical flange plates 21, a plurality of through holes are formed in each of the flange plates 21, and a flange bolt 22 is arranged in each of the through holes of one of the flange plates 21, and a corresponding flange nut 23 is arranged at the end of the flange bolt 22, the through holes in the flange plates 21 are annularly and equidistantly distributed, the flange bolt 22 sequentially penetrates the through holes on the same axis of the two flange plates 21, and the flange bolt 22 is threadedly connected with the flange nut 23.

[0038] In the utility model, when the flange nut 23 is tightened, the force generated by the plurality of flange bolts 22 can uniformly act on the flange plate 21, and the tightness and stability of the connection between the flange assembly 2 and the connecting assembly 3 are increased.

[0039] Further, the connecting assembly 3 comprises a nut 31 connected with a joint body 33, and a detachable sleeve 32 is arranged between the joint body 33 and the nut 31, a first inclined groove 311 is arranged at the left end of the inner side of the nut 31, an inner thread is arranged at the right end of the inner side of the nut 31, a first inclined surface 322, an inner blade 321 and a second inclined surface 323 are sequentially arranged on the inner side of the sleeve 32 from left to right, and the first inclined surface 322 is matched with the first inclined groove 311.

[0040] In the utility model, the first inclined surface 322 of the sleeve 32 slides along the first inclined groove 311 of the nut 31 during installation, the accurate installation of the sleeve 32 is further ensured, and the contact area between the two is increased.

[0041] In addition, a second inclined groove 331 is arranged at the left side of the inner side of the joint body 33, an interface 332 is arranged at the middle of the inner side, a threaded column is arranged at the outer circle of the left joint, and the second inclined groove 331 is matched with the second inclined surface 323.

[0042] In the utility model, the second inclined groove 331 is matched with the second inclined surface 323, the inner thread of the nut 31 is matched and connected with the outer thread of the joint body 33, and during installation, the second inclined surface 323 of the sleeve 32 slides along the second inclined groove 331 in the joint body 33 under the cooperation of the first inclined groove 311 and the first inclined surface 322, and the second inclined groove 331 extrudes the second inclined surface 323 to make the sleeve 32 shrink inwardly during the sliding process.

[0043] Secondly, a pipeline 1 is arranged on the inner side of the connecting assembly 3, a pipeline groove 11 is arranged on the outer wall close to the right end of the pipeline 1, the end of the pipeline 1 sequentially penetrates the left flange plate 21, the nut 31, the sleeve 32 and the interface 332, and the pipeline groove 11 is clamped with the inner blade 321.

[0044] In the utility model, the pipeline 1 end portion is butted with the interface 332, when the nut 31 is tightened, the clamping sleeve 32 is extruded, the inner blade 321 can be embedded in the pipeline groove 11, the sealed connection is formed, the reliability and stability of the pipeline 1 and the connecting assembly 3 connection are improved.

[0045] The PSP steel plastic composite adapter pipe of the embodiment is used, first, the check plate 41 is welded and fixed in the middle of the connecting short pipe 4, then the flange plates 21 on both sides are sleeved on the connecting short pipe 4, and the both ends of the connecting short pipe 4 are welded and fixed with the joint bodies 33 on both sides.

[0046] When the pipeline is needed to be connected, the pipeline 1 end portion on both sides is penetrated through the flange plate 21, the nut 31 and the clamping sleeve 32 and is butted with the interface 332 in the joint body 33, the nut 31 is tightened, the clamping sleeve 32 is accurately installed in place and is inwards retracted in the installation process, the inner blade 321 of the clamping sleeve 32 is embedded in the pipeline groove 11 of the pipeline 1, the firm sealed connection is formed, then the multiple flange bolts 22 are sequentially penetrated through the corresponding perforations on the two flange plates 21, the flange nuts 23 are tightened, the force generated by the multiple flange bolts 22 is uniformly applied on the flange plates 21, the flange plates 21 tightly clamp the connecting assembly 3 in the middle, the tightness and stability of the connection between the flange assembly 2 and the connecting assembly 3 are increased.

Claims

1. A PSP steel plastic composite adapter pipe fitting, comprising a connecting short pipe (4) and a flange assembly (2) symmetrically arranged at both ends of the connecting short pipe (4), and a connecting assembly (3) inside the flange assembly (2), characterized in that: The flange assembly (2) comprises two symmetrical flange plates (21), a plurality of perforations are formed on each of the flange plates (21), and a flange bolt (22) is arranged in each of the perforations on one of the flange plates (21), and the end of the flange bolt (22) is provided with a corresponding flange nut (23), the connecting assembly (3) comprises a joint body (33) and a nut (31) connected with the joint body (33), and a detachable sleeve (32) is arranged between the joint body (33) and the nut (31).

2. The PSP steel-to-plastic adapter fitting of claim 1, wherein: The perforations on the flange plate (21) are annularly and equidistantly distributed, the flange bolt (22) sequentially passes through the perforations on the same axis of the two flange plates (21), and the flange bolt (22) is threadedly connected with the flange nut (23).

3. The PSP steel-to-plastic adapter fitting of claim 1, wherein: The left end of the inner side of the nut (31) is provided with a first inclined groove (311), the right end of the inner side of the nut (31) is provided with an internal thread, and the inner side of the sleeve (32) is sequentially provided with a first inclined surface (322), an inner blade (321) and a second inclined surface (323) from left to right, and the first inclined surface (322) is matched with the first inclined groove (311).

4. The PSP steel-to-plastic adapter fitting of claim 1, wherein: The left side of the inner side of the joint body (33) is provided with a second inclined groove (331), the middle of the inner side is provided with a joint (332), and the left side of the joint body is provided with a threaded column, and the second inclined groove (331) is matched with the second inclined surface (323).

5. The PSP steel-to-plastic adapter fitting of claim 1, wherein: The inner side of the connecting assembly (3) is provided with a pipeline (1), the outer wall of the pipeline (1) near the right end is provided with a pipeline groove (11), the end of the pipeline (1) sequentially penetrates the left flange plate (21), the nut (31), the sleeve (32) and the joint (332), and the pipeline groove (11) is clamped with the inner blade (321).

6. The PSP steel-to-plastic adapter fitting of claim 1, wherein: The connecting short pipe (4) is internally provided with a check plate (41), the check plate (41) is combined by two movable petals (411) and a positioning column, the left side of the two movable petals (411) is rotationally connected with the positioning column through a torsion spring (412), and the right side is provided with a limiting protrusion.

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