CN211040046U

CN211040046U - Intermediate joint for flexible composite pipe

Info

Publication number: CN211040046U
Application number: CN201922295598.2U
Authority: CN
Inventors: 陈霞; 贾天具; 王勇
Original assignee: Shandong Liaocheng Jintai Energy Saving Technology Co ltd
Current assignee: Shandong Liaocheng Jintai Energy Saving Technology Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-07-17
Anticipated expiration: 2029-12-19

Abstract

The utility model discloses an intermediate joint for flexible composite pipe, which belongs to the field of flexible composite pipe joint, and comprises an outer sleeve, a connecting piece and an inner core pipe, wherein at least two groups of installation groove groups are arranged on the periphery of the outer sleeve at equal intervals along the periphery of the outer sleeve, each group of installation groove groups comprises at least two installation grooves, a rotary pressing strip is arranged in each installation groove, an auxiliary sleeve is sleeved on the outer side of each section of outer sleeve, moving grooves which are in one-to-one correspondence with the installation grooves are arranged on the inner side surface of the auxiliary sleeve, and the part of the rotary pressing strip, which is positioned outside the; the auxiliary sleeve and the outer sleeve are respectively and correspondingly provided with a threaded hole and a positioning groove which can be aligned and communicated, and a positioning screw is connected in the threaded hole. The utility model discloses before withholding the effect, grafting stability between flexible composite pipe and the intermediate head is better, avoids flexible composite pipe to take place the off normal, and can insert respectively after the intermediate head two sections flexible composite pipes earlier when the intertillage is connected withholding fixedly, it is comparatively simple and convenient to operate respectively to withhold again.

Description

Intermediate joint for flexible composite pipe

Technical Field

The utility model relates to a flexible composite pipe connects the field, specificly relates to an intermediate head for flexible composite pipe.

Background

The non-adhesive flexible composite pipe is widely applied to the transmission of corrosive and non-corrosive media such as oil, gas, injection chemicals and the like in a buried or seabed long distance due to the characteristics of corrosion resistance, continuity and the like. To prevent bursting due to extreme pressure increases inside the flexible tube caused by leakage or infiltration, the specifications require that a discharge system be designed and that the leaking medium must be discharged through the pipe joint. For the non-adhesive flexible composite pipe long-distance pipeline, an intermediate joint is generally adopted for connecting pipe sections, and the intermediate joint is required to have not only good connection characteristics but also medium connectivity.

At present, the intermediate joint in the prior art basically comprises an outer sleeve, a connecting piece and an inner core pipe which are sequentially assembled in the axial direction, and the application process is as follows: and placing the flexible composite pipe in a gap formed by the outer sleeve and the inner core pipe, and then fixing and sealing the flexible composite pipe by directly radially buckling or necking the outside. Before buckling, the insertion stability between the flexible composite pipe and the intermediate joint is poor, deviation of the flexible composite pipe may occur, and when connecting the pipe sections, the pipe section on one side must be inserted into the intermediate joint and buckled and fixed first, and then the pipe section on the other side must be inserted into the intermediate joint and buckled and fixed, which is cumbersome to operate.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

The to-be-solved technical problem of the utility model is to provide an intermediate head for flexible composite pipe, it is before withholding the effect, and the grafting stability between flexible composite pipe and the intermediate head is better, avoids flexible composite pipe to take place the off normal, and can insert respectively after the intermediate head with two sections flexible composite pipes earlier when the pipeline section is connected again respectively withhold fixedly, and it is comparatively simple and convenient to operate.

2. Technical scheme

In order to solve the above problem, the utility model adopts the following technical scheme:

an intermediate joint for a flexible composite pipe comprises an outer sleeve, a connecting piece and an inner core pipe, wherein two sections of outer sleeves are sleeved on the inner core pipe, sealing pieces are arranged on the inner side surfaces of the outer sleeves and the inner side surface of the inner core pipe respectively, the connecting piece is connected between the two sections of outer sleeves and sleeved on the outer side of the inner core pipe, and an exhaust groove is formed in the inner side of the connecting piece;

the device comprises an outer sleeve, a rotary pressing strip, a fixing shaft, a torsion spring, an auxiliary sleeve, moving grooves and a plurality of mounting groove groups, wherein the outer sleeve is provided with a plurality of mounting groove groups at equal intervals along the circumference, each mounting groove group comprises at least two mounting grooves, the rotary pressing strip is arranged in each mounting groove, the middle part of the rotary pressing strip is rotatably penetrated with the fixing shaft, two ends of the fixing shaft are fixed on the side wall of each mounting groove, the torsion spring is arranged between the rotary pressing strip and the fixing shaft, the length of the rotary pressing strip is greater than the thickness of the outer sleeve, the outer side of each section of the outer sleeve is sleeved with the auxiliary sleeve, the inner side surface of the auxiliary; the auxiliary sleeve and the outer sleeve are respectively and correspondingly provided with a threaded hole and a positioning groove which can be aligned and communicated, and a positioning screw is connected in the threaded hole.

Furthermore, the sealing elements on the inner side surface of the outer sleeve are a plurality of elastic sealing rings arranged at equal intervals, the outer side surfaces of the elastic sealing rings are completely attached to the inner side surface of the outer sleeve, all the elastic sealing rings are positioned on one side of the outer sleeve back to the connecting piece, and the sealing elements on the outer side surface of the inner core tube are elastic sealing layers wrapped on the surface of the sealing layers. The elastic sealing ring and the elastic sealing layer can realize the effect of sealing the flexible composite pipe inserted between the outer sleeve and the inner core pipe.

Further, the both ends that rotate the holding down strip all are the arc of evagination, the mounting groove corresponds the both sides wall on the direction of perpendicular to fixed axle length direction and is for being located the arc section that rotates the holding down strip tip and rotate the orbit, one side that the shifting chute is towards the connecting piece is vertical face, and the lateral wall of other parts of shifting chute is for being located the arc section that rotates the holding down strip tip and rotate the orbit. Set up like this and make the tip that rotates the compressing strip contact mounting groove and/or the lateral wall that removes the groove, its installation that can be convenient for rotate the compressing strip can improve the adaptability that rotates the compressing strip.

Furthermore, both ends of the auxiliary sleeve in the length direction are respectively provided with a limiting block and a limiting groove, the outer sleeve is provided with the limiting groove matched with the limiting block on the auxiliary sleeve and the limiting block matched with the limiting groove on the auxiliary sleeve, and the length of the limiting groove is greater than the width of the limiting block. The setting of two sets of stopper and spacing groove can inject auxiliary sleeve's removal stroke, still is convenient for ensure that screw hole and constant head tank align the intercommunication.

Furthermore, the auxiliary sleeve is formed by splicing and fixing two structures with semicircular end surfaces. When it is installed. The structure that is the semicircle annular with two terminal surfaces is directly buckled on the outer sleeve from the outside of outer sleeve earlier, pays attention to making stopper and spacing groove mutual adaptation, then piecing together and fixing two terminal surfaces are the semicircle annular structure, accomplishes auxiliary sleeve's installation promptly, then sets up like this and is convenient for realize auxiliary sleeve's installation.

3. Advantageous effects

The utility model discloses set up the mounting groove at the week side of outer tube along its periphery equidistant, be equipped with the rotation compressing strip in the mounting groove, the rotatable fixed axle that both ends all fixed on the mounting groove lateral wall that wears to be equipped with in the middle part of rotating compressing strip, and be equipped with the torsional spring between rotation compressing strip and the fixed axle, the outside of every section outer tube all is equipped with auxiliary sleeve pipe, set up the shifting chute with the mounting groove one-to-one on the auxiliary sleeve pipe medial surface, the part that the rotation compressing strip is located the outer tube outside is located corresponding shifting chute; the auxiliary sleeve and the outer sleeve are respectively and correspondingly provided with a threaded hole and a positioning groove which can be aligned and communicated, and a positioning screw is connected in the threaded hole. When the flexible composite pipe fixing device is used, the positioning screw is firstly unscrewed, then an operator respectively holds the auxiliary sleeve and the flexible composite pipe on the corresponding side of the middle joint by two hands, the two hands move towards each other, the auxiliary sleeve is pushed to move towards one side back to the connecting piece while the flexible composite pipe is inserted into the middle joint, the moving groove pushes the rotary compression strip to rotate, the torsion spring is rotated to deflect, the flexible composite pipe is convenient to insert, after the flexible composite pipe is inserted into the middle joint, the auxiliary sleeve moves towards the side where the connecting piece is located, under the reset action of the torsion spring, the rotary compression strip rotates in the reverse direction, the flexible composite pipe is squeezed, the positioning screw is screwed into the positioning groove, namely, the auxiliary sleeve is fixed relative to the outer sleeve, and the rotary compression strip can stably extrude the flexible composite pipe. And inserting the two sections of flexible composite pipes into the intermediate joint respectively, extruding the flexible composite pipes by using the corresponding rotating pressing strips, and finally respectively buckling, fixing and sealing the two sections of flexible composite pipes. Then the utility model discloses before withholding the effect, grafting stability between flexible composite pipe and the intermediate head is better, avoids flexible composite pipe to take place the off normal, and can insert respectively after the intermediate head two sections flexible composite pipes earlier when connecting between the pipeline section withhold fixedly, it is comparatively simple and convenient to operate respectively to withhold again.

Drawings

Fig. 1 is a schematic structural diagram of the present invention when the flexible composite pipe 10 is compressed by rotating the compressing strip 7;

FIG. 2 is a schematic structural view of section A-A of FIG. 1;

fig. 3 is a schematic structural diagram of the present invention when the flexible composite pipe 10 is not compressed by the rotating compressing strip 7.

Reference numerals: 1. an inner core tube; 2. an elastic sealing ring; 3. an auxiliary sleeve; 4. a set screw; 5. positioning a groove; 6. a threaded hole; 7. rotating the compressing strip; 8. a torsion spring; 9. a limiting block; 10. a flexible composite tube; 11. a limiting groove; 12. a fixed shaft; 13. a connecting member; 14. an exhaust groove; 15. a moving groove; 16. mounting grooves; 17. an outer sleeve; 18. an elastomeric sealing layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Examples

The intermediate joint for the flexible composite pipe as shown in fig. 1 comprises an outer sleeve 17, a connecting piece 13 and an inner core pipe 1, wherein two sections of the outer sleeve 17 are sleeved on the inner core pipe 1, sealing pieces are arranged on the inner side surface of the outer sleeve 17 and the outer side surface of the inner core pipe 1, the connecting piece 13 is connected between the two sections of the outer sleeve 17 and sleeved on the outer side of the inner core pipe 1, and an exhaust groove 14 is formed in the inner side of the connecting piece 13;

as shown in fig. 2, at least two sets of installation groove sets (only two sets of installation groove sets are shown in the figure) are provided at equal intervals along the circumference of the outer sleeve 17, each set of installation groove set includes at least two installation grooves 16 (three installation grooves 16 are shown in the figure), a rotary pressing strip 7 is provided in the installation groove 16, a fixed shaft 12 with both ends fixed on the side wall of the installation groove 16 is rotatably penetrated through the middle part of the rotary pressing strip 7, a torsion spring 8 is provided between the rotary pressing strip 7 and the fixed shaft 12, the length of the rotary pressing strip 7 is greater than the thickness of the outer sleeve 17, an auxiliary sleeve 3 is sleeved on the outer side of each section of the outer sleeve 17, moving grooves 15 corresponding to the installation grooves 16 one to one are provided on the inner side surface of the auxiliary sleeve 3, and the part of the rotary pressing strip 7 located on the outer side of the outer; the auxiliary sleeve 3 and the outer sleeve 17 are respectively and correspondingly provided with a threaded hole 6 and a positioning groove 5 which can be aligned and communicated, and a positioning screw 4 is connected in the threaded hole 6.

In this embodiment, the sealing members on the inner side surface of the outer sleeve 17 are a plurality of elastic sealing rings 2 arranged at equal intervals, the outer side surface of each elastic sealing ring 2 is completely attached to the inner side surface of the outer sleeve, all the elastic sealing rings 2 are located on one side of the outer sleeve 17 back to the connecting member 13, and the sealing members on the outer side surface of the inner core tube 1 are elastic sealing layers 18 wrapped on the surface of the sealing members. The elastic sealing ring 2 and the elastic sealing layer 18 can realize the effect of sealing the flexible composite pipe 10 inserted between the outer sleeve 17 and the inner core pipe 1.

In this embodiment, the both ends of rotating compressing strip 7 all are the arc of evagination, mounting groove 16 corresponds the both sides wall on the direction of perpendicular to fixed axle 12 length direction and is for being located the arc section on rotating compressing strip 7 tip rotation orbit, one side that shifting chute 15 is towards connecting piece 13 is vertical face, and the lateral wall of the other part of shifting chute 15 is for being located the arc section on rotating compressing strip 7 tip rotation orbit. The arrangement enables the end of the rotary compression strip 7 to contact the side wall of the mounting groove 16 and/or the moving groove 15, which facilitates the mounting of the rotary compression strip 7 and improves the adaptability of the rotary compression strip 7.

In this embodiment, the both ends side of auxiliary sleeve 3 length direction is equipped with stopper 9 and spacing groove 11 respectively, be equipped with on the outer tube 17 with the spacing groove 11 of stopper 9 looks adaptation on the auxiliary sleeve 3 and with the stopper 9 of the spacing groove 11 looks adaptation on the auxiliary sleeve 3, just the length of spacing groove 11 is greater than the width of stopper 9. The two sets of limiting blocks 9 and the limiting grooves 11 can limit the moving stroke of the auxiliary sleeve 3, and are convenient for ensuring the alignment and communication of the threaded holes 6 and the positioning grooves 5.

In this embodiment, the auxiliary sleeve 3 is formed by two end faces of a semicircular structure which are fixed in a pieced manner. When it is installed. The structure that two terminal surfaces are semicircular ring shape is directly buckled on the outer sleeve 17 from the outer side of the outer sleeve 17, the limiting block 9 and the limiting groove 11 are matched with each other, then the two structures that the terminal surfaces are semicircular ring shape are spliced together and fixed, namely, the installation of the auxiliary sleeve 3 is completed, and the installation of the auxiliary sleeve 3 is convenient to realize by the arrangement.

The specific application process of the intermediate joint for the flexible composite pipe comprises the following steps:

firstly, a section of flexible composite pipe 10 is inserted between the outer sleeve 17 and the inner core pipe 1 from one side of the middle joint, and the specific operation process is as follows: firstly, the positioning screw 4 is unscrewed, then the two hands of the operator respectively hold the auxiliary sleeve 3 and the flexible composite pipe 10 on the corresponding side of the middle joint, the two hands move towards each other and act along the force, the auxiliary sleeve 3 is pushed to move to a side facing away from the connection piece 13 while inserting the flexible composite pipe 10 into the intermediate joint, so that the moving slot 15 pushes the rotating compressing strip 7 to rotate and the torsion spring 8 deflects, as shown in fig. 3, thereby facilitating the insertion of the flexible composite pipe 10, when the flexible composite pipe 10 is inserted in place, the auxiliary sleeve 3 moves to the side of the connecting piece 13, the rotary pressing strip 7 rotates reversely under the reset action of the torsion spring 8, the flexible composite pipe 10 is extruded, the positioning screw 4 is screwed into the positioning groove 5, namely, the auxiliary sleeve 3 is fixed relative to the outer sleeve 17, so that the rotary pressing strip 7 can stably extrude the flexible composite pipe 10; then another section of flexible composite pipe 10 can be inserted between the corresponding outer sleeve 17 and the inner core pipe 1 from the other side of the middle joint, the flexible composite pipe 10 on the side is extruded by the rotary pressing strip 7 on the side in the same steps, and finally, the two sections of flexible composite pipes 10 are respectively buckled, fixed and sealed.

According to the above, the present invention has the advantages that before buckling, the insertion stability between the flexible composite pipe and the intermediate joint is good, the deviation of the flexible composite pipe is avoided, and when connecting the pipe sections, the two sections of flexible composite pipes can be inserted into the intermediate joint respectively and then buckled and fixed respectively, so that the operation is simple.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims

1. An intermediate joint for a flexible composite pipe comprises an outer sleeve (17), a connecting piece (13) and an inner core pipe (1), wherein the inner core pipe (1) is sleeved with two sections of outer sleeves (17), sealing pieces are arranged on the inner side surface of each outer sleeve (17) and the outer side surface of each inner core pipe (1), the connecting piece (13) is connected between the two sections of outer sleeves (17) and sleeved on the outer side of each inner core pipe (1), and the inner side of the connecting piece (13) is provided with an exhaust groove (14); it is characterized in that the peripheral side of the outer sleeve (17) is provided with at least two groups of mounting groove groups at equal intervals along the peripheral circle, each group of mounting groove group comprises at least two mounting grooves (16), a rotary pressing strip (7) is arranged in the mounting groove (16), a fixed shaft (12) with two ends fixed on the side wall of the mounting groove (16) is rotatably arranged in the middle of the rotary pressing strip (7) in a penetrating way, and a torsion spring (8) is arranged between the rotary compressing strip (7) and the fixed shaft (12), the length of the rotary compression strip (7) is greater than the thickness of the outer sleeve (17), the outer side of each section of the outer sleeve (17) is sleeved with an auxiliary sleeve (3), the inner side surface of the auxiliary sleeve (3) is provided with moving grooves (15) which are in one-to-one correspondence with the mounting grooves (16), the part of the rotary pressing strip (7) positioned outside the outer sleeve (17) is positioned in the corresponding moving groove (15); the auxiliary sleeve (3) and the outer sleeve (17) are respectively and correspondingly provided with a threaded hole (6) and a positioning groove (5) which can be aligned and communicated, and a positioning screw (4) is connected in the threaded hole (6).

2. The intermediate joint for the flexible composite pipe as recited in claim 1, wherein the sealing elements on the inner side of the outer sleeve (17) are a plurality of elastic sealing rings (2) arranged at equal intervals, the outer side of the elastic sealing rings (2) is completely attached to the inner side of the outer sleeve, all the elastic sealing rings (2) are located on the side of the outer sleeve (17) facing away from the connecting piece (13), and the sealing elements on the outer side of the inner core pipe (1) are elastic sealing layers (18) wrapped on the surface thereof.

3. The intermediate joint for the flexible composite pipe as recited in claim 1, wherein both ends of the rotary compressing strip (7) are arc-shaped and convex outward, the two side walls of the installation groove (16) in the direction perpendicular to the length direction of the fixed shaft (12) are arc-shaped sections located on the rotation track of the end portion of the rotary compressing strip (7), one side of the moving groove (15) facing the connecting member (13) is a vertical surface, and the side walls of the other portions of the moving groove (15) are arc-shaped sections located on the rotation track of the end portion of the rotary compressing strip (7).

4. The intermediate joint for the flexible composite pipe according to claim 1, wherein the auxiliary sleeve (3) is provided with a limiting block (9) and a limiting groove (11) at two ends in the length direction, the outer sleeve (17) is provided with a limiting groove (11) adapted to the limiting block (9) on the auxiliary sleeve (3) and a limiting block (9) adapted to the limiting groove (11) on the auxiliary sleeve (3), and the length of the limiting groove (11) is greater than the width of the limiting block (9).

5. The intermediate joint for the flexible composite pipe as claimed in claim 4, wherein the auxiliary sleeve (3) is fixed by two semicircular end faces in a pieced manner.