CN111255970A

CN111255970A - Axial expansion joint

Info

Publication number: CN111255970A
Application number: CN202010151480.7A
Authority: CN
Inventors: 邓明洋; 张旭
Original assignee: 邓明洋
Current assignee: SHANDONG HENGTONG EXPANSION JOINT MANUFACTURING Co.,Ltd.
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2020-06-09
Anticipated expiration: 2040-03-06
Also published as: CN111255970B

Abstract

The invention relates to the field of expansion joints, in particular to an axial expansion joint which comprises an outer connecting pipe with openings at two ends, wherein the openings at two ends of the outer connecting pipe are respectively provided with a flange mechanism, when the expansion joint is not used, a telescopic pipe can be placed in the outer connecting pipe to protect the outer connecting pipe, when the expansion joint is required to be used, the telescopic pipe is driven to rotate through a rotating rod, the external thread of the telescopic pipe is in threaded connection with the internal thread of the outer connecting pipe to drive the telescopic pipe to extend outwards, so that the telescopic pipe extends into a branch pipe after the expansion joint is installed, a telescopic pipe positioning bolt is lowered into the outer connecting pipe through threaded connection with a telescopic pipe positioning screw hole by rotating the telescopic pipe positioning bolt to support the telescopic pipe, the telescopic pipe can be prevented from retracting when the telescopic pipe is used, water in a branch pipe directly passes through the telescopic pipe and is not at, and then reduced the sealing pressure of flange, avoided influencing the life of expansion joint.

Description

Axial expansion joint

Technical Field

The invention relates to the field of expansion joints, in particular to an axial expansion joint.

Background

In a conveying process pipeline, the arrangement of pipe sections is complicated, the axial, transverse and angular dimensions of the pipeline are easy to change due to pressure, temperature, medium, vibration, installation dislocation and the like, and the problem is generally solved by installing metal expansion joints with different structures.

When the existing expansion joint is used, a part of expansion joint internal telescopic pipe can be adjusted in a telescopic mode, the expansion joint internal telescopic pipe is movably connected with an external connecting pipe in order to ensure the realization of the telescopic function, and after the expansion joint is integrally installed, the integral installation of the telescopic pipe is fixed and unstable, so that the service life of the expansion joint can be influenced, and an axial expansion joint is necessary to be provided.

Disclosure of Invention

The invention provides an axial expansion joint aiming at the problems in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides an axial type expansion joint, includes that one is the outer connecting pipe that both ends opening set up the both ends opening part of outer connecting pipe all is provided with a flange mechanism, two all be the even equidistance of form of encircleing in the flange mechanism and be provided with a plurality of fixed establishment, all be connected with a flexible pipe mechanism on the inner wall of outer connecting pipe, the center department of inner wall has a flexible pipe supporting mechanism about two flexible pipe mechanism fixed mounting in the outer connecting pipe, flexible pipe supporting mechanism is located the inside of two flexible pipe mechanisms and all is provided with a stay tube sealing mechanism, two flexible pipe mechanism all is provided with a flexible pipe sealing mechanism on being located the inside lateral wall of flange mechanism, two the inside of flange mechanism all is provided with a flange sealing mechanism.

Specifically, flange mechanism includes two first flanges, two first flange difference fixed mounting is at the both ends opening part of outer joint pipe, two the first flange is kept away from the one end lateral wall of outer joint pipe and all is provided with a second flange outward, two the lateral wall that the second flange is close to first flange one side offsets with the first flange that corresponds respectively, two equal fixed connection a branch pipe, two on the lateral wall that first flange one side was kept away from to the second flange corresponds the position of outer joint pipe equal fixed connection branch pipe, two the wherein one end opening of branch pipe is linked together with the both ends opening of outer joint pipe respectively.

Specifically, a plurality of fixed establishment all includes two flange fixing screw, two flange fixing screw sets up respectively on the first flange and the second flange that correspond the position, two correspond common threaded connection has a flange fixing bolt in the flange fixing screw, flange fixing bolt's wherein one end runs through the flange fixing screw on the second flange and outwards extends and threaded connection has a nut.

Specifically, the telescopic tube mechanism comprises two telescopic tubes, wherein the outer tube wall of one end of each of the two telescopic tubes opposite to each other is provided with threads, the inner tube wall of the outer connecting tube corresponding to the two telescopic tubes is provided with threads, the two telescopic tubes are respectively in threaded connection with the openings at the two ends of the outer connecting tube through threads, the far ends of the two telescopic tubes sequentially penetrate through the corresponding openings of the outer connecting tube and the openings of the branch tubes and extend into the branch tubes, a rotating rod is fixedly connected between the inner tube walls of the two telescopic tubes positioned in the branch tubes, a telescopic tube positioning screw hole is respectively formed in the closing part of the outer connecting tube corresponding to the two telescopic tubes, a telescopic tube positioning bolt is respectively in threaded connection with the inner positioning screw holes of the two telescopic tubes, the lower ends of the two telescopic tube positioning bolts respectively penetrate through the lower end orifices of the corresponding telescopic tube, and one end of the two telescopic pipe positioning bolts, which is positioned in the outer connecting pipe, is respectively abutted against the two telescopic pipes.

Specifically, the telescopic pipe supporting mechanism comprises a fixing ring, the fixing ring is fixedly connected to the center of the inner pipe wall of the outer connecting pipe, a supporting pipe is fixedly connected to the inner ring wall of the fixing ring, and two ends of the supporting pipe respectively penetrate through corresponding openings of the telescopic pipes and respectively extend into the two telescopic pipes.

Specifically, two stay tube sealing mechanism all includes a first ring channel, two first ring channel is seted up respectively on the stay tube is located two sections outer pipe walls of two telescopic pipes, two a stay tube sealing washer has all been cup jointed in the first ring channel, two the lateral wall of stay tube sealing washer all runs through the notch of first ring channel and extends to respectively in two telescopic pipes, two the lateral wall that the stay tube sealing washer is located two telescopic pipes offsets with the interior pipe wall of two telescopic pipes respectively.

Specifically, two flexible pipe sealing mechanisms all include a second ring channel, two the second ring channel is seted up respectively on two flexible pipe lie in the intraductal one end outer pipe wall of branch, two all cup jointed a flexible pipe sealing washer in the second ring channel, two the lateral wall of flexible pipe sealing washer all runs through the notch of second ring channel and extends to respectively in the branch pipe that corresponds, two flexible pipe sealing washer lie in the lateral wall of branch pipe and offset with the interior pipe wall of corresponding branch pipe respectively.

Specifically, two flange seal mechanism all includes a seal groove that is the annular setting, two the junction on the inner ring wall of two first flanges and two second flanges is seted up respectively to the seal groove, two all fixed flange seal ring that has cup jointed in the seal groove.

The invention has the beneficial effects that:

(1) when the expansion joint is not used, the expansion pipe can be placed in the outer connecting pipe to protect the expansion joint, when the expansion joint needs to be used, the expansion pipe is driven to rotate through the rotating rod, the external thread of the expansion pipe is in threaded connection with the internal thread of the outer connecting pipe to drive the expansion pipe to extend outwards, the expansion joint is enabled to extend into the branch pipe after being installed, the expansion pipe positioning bolt is enabled to descend into the outer connecting pipe through threaded connection with the expansion pipe positioning screw hole by rotating the expansion pipe positioning bolt, the expansion pipe is supported, the expansion pipe can be prevented from retracting when being used, and water in the branch pipe can directly pass through the expansion pipe.

(2) When the axial expansion joint is used, water in one branch pipe flows into one of the extension pipes, then flows into the other extension pipe through the support pipe, and flows into the other branch pipe through the other extension pipe, the expansion joint can seal the joint of the extension pipe and the branch pipe through the matching of the second annular groove and the extension pipe sealing ring while flowing in the internal water, and meanwhile, the joint of the extension pipe and the support pipe can be sealed through the first annular groove and the support pipe sealing ring, so that water is prevented from leaking to the joint of the flange.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural view of an axial expansion joint according to the present invention;

FIG. 2 is a schematic view of a connection structure between a telescopic tube mechanism and a telescopic tube support mechanism in an axial expansion joint according to the present invention;

FIG. 3 is a schematic side view of a second flange of an axial expansion joint according to the present invention;

FIG. 4 is an enlarged schematic view of portion A of FIG. 1 of an axial expansion joint according to the present invention;

fig. 5 is an enlarged schematic structural view of a portion B in fig. 1 of an axial expansion joint according to the present invention.

In the figure: 1. an outer connecting pipe; 2. a flange mechanism; 21. a first flange; 22. a second flange; 23. a branch pipe; 3. a fixing mechanism; 31. a flange fixing screw hole; 32. a flange fixing bolt; 33. a nut; 4. a telescopic pipe mechanism; 41. a telescopic pipe; 42. rotating the rod; 43. the telescopic pipe positioning screw hole; 44. a telescopic pipe positioning bolt; 5. a telescopic tube supporting mechanism; 51. a fixing ring; 52. supporting a tube; 6. a support tube sealing mechanism; 61. a first annular groove; 62. supporting a pipe sealing ring; 7. a telescopic tube sealing mechanism; 71. a second annular groove; 72. a telescopic pipe sealing ring; 8. a flange sealing mechanism; 81. a sealing groove; 82. a flange seals the gasket.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1-5, the axial expansion joint according to the present invention includes an outer connection pipe 1 having two openings at both ends, wherein the outer connection pipe 1 has a flange mechanism 2 at both openings at both ends, the two flange mechanisms 2 are respectively provided with a plurality of fixing mechanisms 3 around the outer connection pipe 1, the inner wall of the outer connection pipe 1 is connected with a telescopic pipe mechanism 4, a telescopic pipe supporting mechanism 5 is fixedly installed at the center of the inner wall of the outer connection pipe 1 with respect to the two telescopic pipe mechanisms 4, the telescopic pipe supporting mechanism 5 is provided with a support pipe sealing mechanism 6 inside the two telescopic pipe mechanisms 4, the outer side walls of the two telescopic pipe mechanisms 4 inside the flange mechanisms 2 are respectively provided with a telescopic pipe sealing mechanism 7, and the inside of the two flange mechanisms 2 is provided with a flange sealing mechanism 8.

Specifically, flange mechanism 2 includes two first flanges 21, two first flanges 21 are fixed mounting at the both ends opening part of outer joint pipe 1 respectively, two first flanges 21 all are provided with a second flange 22 outside keeping away from the one end lateral wall of outer joint pipe 1, the lateral wall that two second flanges 22 are close to first flange 21 one side offsets with the first flange 21 that corresponds respectively, equal fixed connection a branch pipe 23 on the position that the lateral wall that two second flanges 22 kept away from first flange 21 one side corresponds outer joint pipe 1, wherein one end opening of two branch pipes 23 is linked together with the both ends opening of outer joint pipe 1 respectively.

Specifically, a plurality of fixing mechanism 3 all includes two flange fixing screw holes 31, set up respectively on the first flange 21 and the second flange 22 of corresponding position for two flange fixing screw holes 31, common threaded connection has a flange fixing bolt 32 in two flange fixing screw holes 31 that correspond, one of them one end of flange fixing bolt 32 runs through flange fixing screw hole 31 on the second flange 22 and outwards extends and threaded connection has a nut 33 to fix first flange 21 and second flange 22 through flange fixing bolt 32, and then accomplish the fixed of expansion joint.

Specifically, the telescopic tube mechanism 4 comprises two telescopic tubes 41, wherein the outer wall of one end of each of the two telescopic tubes 41 opposite to each other is provided with threads, the inner wall of the outer connecting tube 1 corresponding to the positions of the two telescopic tubes 41 is provided with threads, the two telescopic tubes 41 are respectively in threaded connection with the openings at the two ends of the outer connecting tube 1 through threads, the end away from the two telescopic tubes 41 sequentially penetrates through the corresponding opening of the outer connecting tube 1 and the opening of the branch tube 23 and extends into the branch tube 23, a rotating rod 42 is fixedly connected between the inner walls of the two telescopic tubes 41 in the branch tube 23, a telescopic tube positioning screw hole 43 is respectively formed in the closed outer connecting tube 1 corresponding to the positions of the two telescopic tubes 41, a telescopic tube positioning bolt 44 is respectively in threaded connection with the two telescopic tube positioning screw holes 43, the lower ends of the two telescopic tubes 44 respectively penetrate through the lower end openings of the corresponding telescopic tube positioning screw holes, two the one end that flexible pipe positioning bolt 44 is located outer connecting pipe 1 offsets with two flexible pipes 41 respectively, can place flexible pipe 41 in outer connecting pipe 1 and protect it, when needs use, drive flexible pipe 41 through dwang 42 and rotate, the external screw thread of flexible pipe 41 and the internal thread looks threaded connection of outer connecting pipe 1, and then drive flexible pipe 41 rotary type and remove and stretch out outward, later rotate two flexible pipe positioning bolts 44 again for the lower extreme of two flexible pipe positioning bolts 44 extends to in outer connecting pipe 1, and then fix a position flexible pipe 41, prevent its random movement.

Specifically, the telescopic tube supporting mechanism 5 includes a fixing ring 51, the fixing ring 51 is fixedly connected to the center of the inner wall of the outer connecting tube 1, a supporting tube 52 is fixedly connected to the inner wall of the fixing ring 51, two ends of the supporting tube 52 respectively penetrate through corresponding openings of the telescopic tubes 41 and respectively extend into the two telescopic tubes 41, the telescopic tubes 41 can be placed in the outer connecting tube 1 to be protected, water in one of the branch tubes 23 flows into one of the telescopic tubes 41, then flows into the other telescopic tube 41 through the supporting tube 52, and flows into the other branch tube 23 through the other telescopic tube 41.

Specifically, the two support tube sealing mechanisms 6 each include a first annular groove 61, the two first annular grooves 61 are respectively formed in two outer tube walls of the support tube 51 located in the two extension tubes 41, a support tube sealing ring 62 is respectively sleeved in the two first annular grooves 61, outer side walls of the two support tube sealing rings 62 respectively penetrate through notches of the first annular grooves 61 and respectively extend into the two extension tubes 41, outer side walls of the two support tube sealing rings 62 located in the two extension tubes 41 respectively abut against inner tube walls of the two extension tubes 41, a joint between the extension tube 41 and the support tube 52 can be sealed by the first annular groove 61 and the support tube sealing rings 62, and water flow can be prevented from entering the outer connection tube 1 from the joint between the extension tube 41 and the support tube 52.

Specifically, the two extension tube sealing mechanisms 7 each include a second annular groove 71, the two second annular grooves 71 are respectively formed in the outer pipe walls of the ends, located in the branch pipes 23, of the two extension tubes 41, one extension tube sealing ring 72 is respectively sleeved in the two second annular grooves 71, the outer side walls of the two extension tube sealing rings 72 respectively penetrate through the notches of the second annular grooves 71 and respectively extend into the corresponding branch pipes 23, the outer side walls, located in the branch pipes 23, of the two extension tube sealing rings 72 respectively abut against the inner pipe walls of the corresponding branch pipes 23, the joints between the extension tubes 41 and the branch pipes 23 are sealed through the matching of the second annular grooves 71 and the extension tube sealing rings 72, and therefore water flow can be prevented from entering the flange joints from the joints between the extension tubes 41 and the branch pipes 23.

Specifically, two flange sealing mechanism 8 all include one and are the seal groove 81 that the annular set up, and two seal grooves 81 are seted up respectively in the junction on two first flanges 21 and two second flanges 22 inner ring wall, and two seal grooves 81 are internal all fixed cup joints a flange seal ring 82, and the cooperation through seal groove 81 and flange seal ring 82 seals the junction of flange, has strengthened the whole leakproofness of expansion joint.

When the expansion joint is not used, the extension tube 41 can be placed in the outer connecting tube 1 to protect the expansion joint, when the expansion joint needs to be used, the extension tube 41 is driven to rotate by the rotating rod 42, the external thread of the extension tube 41 is in threaded connection with the internal thread of the outer connecting tube 1, so that the extension tube 41 is driven to rotatably move and extend outwards, after the expansion joint is installed, the two extension tubes 41 respectively extend into the two branch tubes 23, then the two extension tube positioning bolts 44 are rotated, the two extension tube positioning bolts 44 are lowered into the outer connecting tube 1 and abut against the two extension tubes 41 through the threaded connection relationship between the two extension tube positioning bolts 44 and the two extension tube positioning screw holes 43, so that the two extension tubes 41 are limited, the two extension tubes 41 retract, and water flow in the operation flows into one of the extension tubes 41 through the water flow in one branch tube 23, then flows into the other extension tube 41 through the support tube 52, and flows into the other branch tube 23 through the other extension tube 41, so as to prevent water from directly flowing in the outer connecting tube 1, reduce the pressure of the water on the outer connecting tube 1, and further improve the service life of the expansion joint, when the water flows in the expansion joint, the joint of the extension tube 41 and the branch tube 23 can be sealed through the matching of the second annular groove 71 and the extension tube sealing ring 72, and simultaneously, the joint of the extension tube 41 and the support tube 52 can be sealed through the first annular groove 61 and the support tube sealing ring 62, so that the water in the branch tube 23 directly passes through the extension tube 41 and the support tube 52, and does not pass through the joint of the flanges, thereby avoiding water leakage to the joint of the flanges, further reducing the sealing pressure of the flanges, and further improving the service life of the expansion joint, meanwhile, the joint of the flanges is sealed through the matching of the sealing groove 81 and the flange sealing gasket 82, so that the overall sealing performance of the expansion joint is enhanced.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an axial type expansion joint, includes that one is outer connecting pipe (1) that both ends opening set up, its characterized in that: the openings at the two ends of the outer connecting pipe (1) are respectively provided with a flange mechanism (2), a plurality of fixing mechanisms (3) are respectively arranged on the two flange mechanisms (2) in a surrounding shape at uniform and equal intervals, the inner pipe walls of the outer connecting pipes (1) are connected with a telescopic pipe mechanism (4), a telescopic pipe supporting mechanism (5) is fixedly arranged at the center of the inner pipe wall of the outer connecting pipe (1) and relative to the two telescopic pipe mechanisms (4), the telescopic pipe supporting mechanism (5) is provided with a supporting pipe sealing mechanism (6) inside the two telescopic pipe mechanisms (4), the two telescopic pipe mechanisms (4) are provided with a telescopic pipe sealing mechanism (7) on the outer side wall inside the flange mechanism (2), and the two flange mechanisms (2) are provided with a flange sealing mechanism (8) inside.

2. An axial expansion joint according to claim 1, wherein: flange mechanism (2) includes two first flanges (21), two first flange (21) is fixed mounting respectively at the both ends opening part of outer joint pipe (1), two the lateral wall that outer joint pipe (1) was kept away from in first flange (21) all is provided with one second flange (22), two outside second flange (22) are close to the lateral wall of first flange (21) one side and offset with corresponding first flange (21) respectively, two equal fixed connection branch pipe (23) on the position that the lateral wall that first flange (21) one side was kept away from in second flange (22) corresponds outer joint pipe (1), two wherein one end opening of branch pipe (23) is linked together with the both ends opening of outer joint pipe (1) respectively.

3. An axial expansion joint according to claim 1, wherein: a plurality of fixed establishment (3) all include two flange fixing screw (31), two flange fixing screw (31) are seted up respectively on first flange (21) and second flange (22) of corresponding position, two correspond common threaded connection has a flange fixing bolt (32) in flange fixing screw (31), the flange fixing screw (31) on second flange (22) are run through to one of them one end of flange fixing bolt (32) and outwards extend and threaded connection has a nut (33).

4. An axial expansion joint according to claim 1, wherein: the telescopic pipe mechanism (4) comprises two telescopic pipes (41), the outer pipe wall of one end of each of the two telescopic pipes (41) in the opposite direction is provided with threads, the inner pipe wall of the outer connecting pipe (1) corresponding to the positions of the two telescopic pipes (41) is provided with threads, the two telescopic pipes (41) are respectively in threaded connection with openings at two ends of the outer connecting pipe (1) through threads, one ends of the two telescopic pipes (41) far away are respectively and sequentially penetrated through the corresponding openings of the outer connecting pipe (1) and the openings of the branch pipes (23) and extend into the branch pipes (23), a rotating rod (42) is fixedly connected between the inner pipe walls of the two telescopic pipes (41) positioned in the branch pipes (23), the outer connecting pipe (1) corresponding to the positions of the two telescopic pipes (41) is respectively penetrated and provided with a telescopic pipe positioning screw hole (43), and a telescopic pipe positioning bolt (44) is in each telescopic pipe positioning screw hole (43), the lower ends of the two telescopic pipe positioning bolts (44) respectively penetrate through the lower end hole openings of the corresponding telescopic pipe positioning screw holes (43) and extend into the outer connecting pipe (1), and one ends of the two telescopic pipe positioning bolts (44) located in the outer connecting pipe (1) are respectively abutted against the two telescopic pipes (41).

5. An axial expansion joint according to claim 1, wherein: the telescopic pipe supporting mechanism (5) comprises a fixing ring (51), the fixing ring (51) is fixedly connected to the center of the inner pipe wall of the outer connecting pipe (1), a supporting pipe (52) is fixedly connected to the inner ring wall of the fixing ring (51), and two ends of the supporting pipe (52) respectively penetrate through corresponding openings of the telescopic pipes (41) and respectively extend into the two telescopic pipes (41).

6. An axial expansion joint according to claim 1, wherein: the two supporting tube sealing mechanisms (6) respectively comprise a first annular groove (61), the two first annular grooves (61) are respectively arranged on two sections of outer tube walls of the supporting tubes (51) which are positioned in the two telescopic tubes (41), a supporting tube sealing ring (62) is respectively sleeved in the two first annular grooves (61), the outer side walls of the two supporting tube sealing rings (62) respectively penetrate through the notches of the first annular grooves (61) and respectively extend into the two telescopic tubes (41), and the outer side walls of the two supporting tube sealing rings (62) which are positioned in the two telescopic tubes (41) respectively abut against the inner tube walls of the two telescopic tubes (41).

7. An axial expansion joint according to claim 1, wherein: two flexible pipe sealing mechanism (7) all include one second ring channel (71), two second ring channel (71) are seted up respectively on two flexible pipe (41) are located the one end outer pipe wall in branch pipe (23), two flexible pipe sealing washer (72) have all been cup jointed in second ring channel (71), two the lateral wall of flexible pipe sealing washer (72) all runs through the notch of second ring channel (71) and extends to respectively in corresponding branch pipe (23), two the lateral wall that flexible pipe sealing washer (72) are located branch pipe (23) offsets with the interior pipe wall of corresponding branch pipe (23) respectively.

8. An axial expansion joint according to claim 1, wherein: two flange sealing mechanism (8) all include one and are seal groove (81) that the annular set up, two seal groove (81) are seted up respectively in two first flanges (21) and two junctions on second flange (22) inner ring wall, two all fixed flange seal ring (82) of having cup jointed in seal groove (81).