CN204829009U - Screw thread compresses tightly clamp formula pipeline connecting device - Google Patents

Abstract

The utility model discloses a thread clamp type pipeline connection device, which comprises an outer shell and a sealing device, the outer shell is composed of a first half-ring body and a second half-ring body, the sealing device is composed of a threaded frame body, Two threaded locking rings and two sealing rings; the two threaded locking rings are connected to the threaded frame body through non-standard large-pitch threads; the two sides of the sealing ring are respectively connected to the inner end surface of the threaded locking ring and the The sealing surfaces of the threaded frame body offset each other; the application provides a pipeline connection device with simple structure, convenient installation, good sealing performance and stable firmness.

Description

A threaded compression clamp type pipeline connection device

technical field

The utility model relates to a pipeline conveying system, in particular to a screw clamp type pipeline connection device.

Background technique

In large-scale compressed air or fluid pipeline systems, it is usually necessary to use larger diameter delivery pipelines in conjunction with small diameter delivery pipelines. Small pipe joints can be used for small diameter pipes, but this type of pipe joint is not suitable For pipelines with larger diameters, the connection strength cannot meet the requirements of pipelines with larger diameters.

For the connection devices of larger diameter pipelines, the flange connection is generally used at present, which needs to be welded on site and then leak tested. If the weld has welding defects such as slag inclusion, it needs to be reworked, which has higher requirements for the on-site installation workers. The installation efficiency is low, and it is not easy to disassemble; in the prior art, another commonly used pipeline connection device is composed of an outer shell and a sealing device, and the sealing device is composed of a ring frame, two compression rings and two "O"-shaped sealing rings ,Through the action of the annular arc surface, the annular inclined surface or the third annular inclined surface, the "O"-shaped sealing ring protrudes inward, so that the "O"-shaped sealing ring is in close contact with the outer wall of the fluid delivery pipeline, and the sealing connection and positioning of the pipeline are realized; The sealing effect and firmness of this method are not very ideal in practical applications. Because of the limited structural deformation range, only one sealing ring can be placed. In addition, because the two pressure rings are made of plastic, they need to be locked by external force during installation. , prone to fragmentation problems at low temperatures, and has a complex structure and high cost.

Utility model content

Aiming at the problems existing in the prior art, the present application provides a screw clamp type pipeline connection device with good sealing effect, low cost and stable performance. The specific technical scheme is as follows.

The application provides a threaded compression clamp type pipeline connection device, the device includes an outer shell (12) and a sealing device (7), the outer shell is composed of a first semi-annular body (1) and a second semi-annular body (2) Composition, the first semi-annular body (1) and the second semi-annular body (2) are connected by a lock member, and the inner walls of the first semi-annular body (1) and the second semi-annular body (2) are respectively provided with semi-annular The installation groove (103), the two semi-annular bodies close together to form an annular installation groove, the sealing device is located in the annular installation groove, and the two sides of the semi-annular installation groove (103) are respectively provided with annular slopes (102), the sealing device It consists of a threaded frame body (3), two threaded locking rings (4) and a sealing ring (5); the inner side of the two threaded locking rings (4) is provided with locking ring threads (42); the The two ends of the threaded frame body (3) are respectively provided with frame body threads (32), and the threaded locking ring (4) and the threaded frame body (3) pass through the locking ring thread (42) and the frame body thread (32). ) connection, the locking ring thread (42) and the frame body thread (32) are all non-standard large-pitch threads, and the thread surface (43) of the locking ring thread (42) is connected to the adjacent frame body thread (32 The distance between the threaded surfaces (33) of ) is at least 1 times the effective deformation distance of the sealing ring (5); the two sides of the sealing ring (5) are respectively connected to the inner end surface (41) and The sealing surface (31) of the threaded frame body (3) offsets.

Preferably, the outer end surface (44) of the threaded locking ring (4) in the present application is a bevel, and the outer end surface (44) is annularly connected with the first half-ring body (1) and the second half-ring body (2). The inclined surfaces (102) are parallel, which can ensure that the outer end surface (44) and the annular inclined surface (102) are fully bonded and sealed, thereby improving firmness and sealing.

Preferably, an annular boss (45) is provided between the inner end surface (41) of the threaded locking ring (4) in the present application and the thread (42) of the locking ring, and the annular boss (45) is inserted into the threaded The threaded lower end surface (34) of the support body, the inner end surface (46) of the annular boss (45), that is, the inner end surface (41) of the threaded locking ring (4) and the sealing ring (5) offset.

The number of sealing rings (5) in this application is a multiple of 2, preferably four or six. When there are multiple sealing rings, preferably, a sealing retaining ring is provided between the sealing rings to reduce the impact of fluid on the sealing rings and prolong the service life of the sealing rings.

Preferably, the distance between the threaded surface (43) of the locking ring thread (42) and the threaded surface (33) of the adjacent frame body thread (32) in the present application is 1.5 times that of the sealing ring (5) Effective deformation distance.

Preferably, the locking members described in this application are bolts (8) and nuts (9), and the outer casing is provided with bolt holes (81).

In the actual application process, first put the sealing device on the pipe joint of the two pipes (6), that is, put the threaded frame body (3) and the sealing ring (5) on both sides, and the threaded locking ring (4) on the At the joint of two pipes. The threads of the threaded locking ring (4) and the threaded frame (3) are non-standard large-pitch thread structures. When the threaded locking ring (4) is screwed into the threaded frame (3), the threaded locking ring (4) The inner end surface (41) of the threaded locking ring that is in contact with the sealing ring (5) pushes the sealing ring (5) into the threaded frame (3), when the seal between the sealing ring 5 and the threaded frame 3 is pushed After the surfaces 31 are in contact, the sealing ring (5) is extruded by the threaded surface (43) screwing in on the threaded surface (33) on the threaded frame body (3), so that the sealing ring (5) produces an effective seal Deformation; seal the gap between the threaded frame body (3) and the pipe (6). When the inner end surface (47) of the threaded locking ring (4) is in contact with the outer end surface (36) of the threaded frame body (3), the sealing ring (5) reaches the maximum sealing deformation, and the threaded locking ring (4) cannot be pushed forward , the protection sealing ring (5) will not be deformed and failed. When the sealing ring (5) in the sealing device achieves effective deformation, the first semi-annular body (1) and the second semi-annular body (2) of the outer casing close together to form an annular installation groove and the entire sealing The unit has very little clearance for installation. When the sealing ring (5) in the sealing device does not achieve the best effective deformation, the threaded locking rings (4) at both ends of the sealing device will resist the annular slopes (102) on both sides of the annular installation groove, and the two sides of the annular installation groove The annular slope (102) can extrude the outer end face (44) of the threaded locking ring (4), and the threaded surface (43) on the threaded locking ring (4) and the threaded thread on the adjacent threaded frame (3) The distance between the surfaces (33) is preferably greater than 1.5 times the effective deformation distance of the sealing ring. After the outer end surface (44) of the threaded locking ring (4) is squeezed, the threaded surface (43) of the threaded locking ring (4) ) is separated from the threaded surface (33) on the threaded frame body (3) in contact, the threaded locking ring (4) moves axially toward the threaded frame body (3), and the inner threaded locking ring (4) The end face (41) squeezes the sealing ring (5), so that the sealing ring (5) produces effective sealing deformation. When the sealing device is placed in the annular mounting groove, it is ensured that the sealing ring (5) produces effective sealing deformation to seal the gap between the threaded frame body (3) and the pipe (6).

After the whole sealing device is locked, the sealing ring (5) seals the gap between the pipeline (6) and the threaded frame body (3), and the thread locking ring (4) is in a compressed state. There is a small installation gap between the outer end surface (44) of the threaded locking ring (4) and the annular installation groove formed by closing the first half-ring body (1) and the second half-ring body (2). Preferably, when the outer end face (44) of the threaded locking ring (4) is a bevel, and the outer end face (44) is parallel to the annular bevel (102) of the first semi-annular body (1) and the second semi-annular body (2) At this time, the outer end surface (44) of the threaded locking ring (4) can completely fit with the annular installation groove formed by the closure of the first semi-annular body (1) and the second semi-annular body (2), and there is almost no gap. The firmness and tightness of the sealing device are guaranteed. When the first semi-annular body and the second semi-annular body are closed to clamp the pipeline, no external force is applied to the sealing device.

When the connecting device is in use due to vibration, thermal expansion and contraction, etc., the threaded locking ring (4) is loosened, because the installation gap is small or no, the annular slope (102) of the annular installation groove will prevent the threaded locking ring (4) The axial movement ensures the sealing effect.

During installation, when there is a slight deviation in the position of the sealing device, the annular inclined surface (102) on one side of the annular installation groove will squeeze the outer end surface (44) of the threaded locking ring (4), and the thread (42) of the threaded locking ring and the The thread (32) of the threaded frame body is a thread with a non-standard large pitch, and the extruding force of the outer end surface (44) of the thread locking ring separates the contacting threads, and no extrusion between threads occurs. The received extrusion force is transmitted to the sealing ring (5), and the positional relationship between the sealing device and the annular installation groove is adjusted through the deformation and movement of the sealing ring.

In order to increase the sealing effect and service time of the sealing ring (5), a sealing ring can be added on each side, because the threaded locking ring (4) can ensure the effective sealing deformation distance of the two sealing rings due to the action of thread extrusion .

Beneficial effects: the pipeline connection device of the present application provides a connection device with simple structure, convenient installation, good sealing performance and firm connection through the cooperation design of the threaded frame body and the thick thread on the thread locking ring and the sealing ring.

Description of drawings

Fig. 1 Exploded structural diagram of thread compression clamp type pipeline connection device;

Figure 2 is a cross-sectional view of a threaded compression clamp type pipeline connection device;

Figure 3 is a cross-sectional view of the threaded compression clamp type pipeline connection device;

Figure 4 is a sectional view of a threaded frame;

Figure 5 is a cross-sectional view of the threaded locking ring;

In the figure: 1-first semi-annular body, 2-second semi-annular body, 3-threaded frame, 4-thread locking ring, 5-sealing ring, 6-pipe, 7-sealing device, 8-bolt , 9-nut, 102-annular bevel, 103-semi-annular installation groove, 104-installation gap, 31-sealing surface with threaded frame, 32-threaded frame with thread, 33-threaded surface with threaded frame , 34- threaded lower end face of threaded frame, 36- outer end face of threaded frame, 41- inner end face of threaded locking ring, 42- threaded threaded locking ring, 43- threaded face of threaded locking ring , 44-the outer end face of the thread locking ring, 45-annular boss, 46-the inner end face of the annular boss, 47-the ring inner end face of the thread locking ring, 81-bolt hole.

Detailed ways

The application will be further explained below in conjunction with the accompanying drawings.

Figure 1-3 is a schematic structural diagram of the threaded compression clamp type pipeline connection device provided by the present application. It can be seen from the figure that the connection device shown includes an outer shell and a sealing device 7, and the outer shell is composed of the first half The ring body 1 and the second half ring body 2 are formed, the first half ring body 1 and the second half ring body 2 are connected by bolts 8 and nuts 9, and the inner side walls of the first half ring body 1 and the second half ring body 2 A semi-annular installation groove 103 is respectively provided, and the two half-rings are closed to form an annular installation groove. The sealing device 7 is arranged in the annular installation groove, and the two sides of the semi-annular installation groove 103 are respectively provided with an annular slope 12; the sealing device 7 includes a threaded frame body 3, two threaded locking rings 4 and two sealing rings 5; the inner side of the two threaded locking rings 4 is provided with a locking ring thread 42; the threaded frame body 3 Both ends are respectively provided with frame body threads 32, and the threaded locking ring 4 and the threaded frame body 3 are connected through the locking ring threads 42 and the frame body threads 32, and the locking ring threads 42 and the frame body threads 32 are non-standard For a thread with a large pitch, the distance between the thread surface 43 of the locking ring thread 42 and the thread surface 33 of the adjacent frame body thread 32 is preferably 1.5 times the effective deformation distance of the sealing ring 5; the two sides of the sealing ring 5 are respectively It abuts against the inner end surface 41 of the threaded locking ring 4 and the sealing surface 31 of the threaded frame body 3 .

As shown in FIG. 3 , preferably, the outer end surface 44 of the threaded locking ring 4 in the present application is a slope, and the outer end surface 44 is parallel to the annular slope 102 of the first half-ring body 1 and the second half-ring body 2 ; Preferably, an annular boss 45 is provided between the inner end surface 41 of the threaded locking ring 4 and the thread 42 of the locking ring in the present application, and the annular boss 45 is inserted into the threaded lower end surface 34 of the threaded frame body, and the annular boss 45 The inner end surface 46 of the platform 45 , that is, the inner end surface 41 of the threaded locking ring 4 abuts against the sealing ring 5 . In order to increase the sealing effect and service time of the sealing ring 5, a sealing ring can be added on both sides. Because the threaded locking ring 4 is extruded by the thread, the effective sealing deformation distance of the two sealing rings can be guaranteed.

When installing in practical application, firstly, the sealing device is set on the pipe joint of two pipelines 6, that is, the threaded frame body 3 and the sealing ring 5 and the thread locking ring 4 on both sides are set on the pipe joint of the two pipelines. The threads of the threaded locking ring 4 and the threaded frame body 3 are non-standard large-pitch thread structures. When the threaded locking ring 4 is screwed into the threaded frame body 3, the contact surface of the threaded locking ring 4 and the sealing ring 5 The inner end surface 41 of the threaded locking ring pushes the sealing ring 5 into the threaded frame body 3, when the pushing sealing ring 5 contacts the sealing surface 31 of the threaded frame body 3, the inner end surface 41 of the threaded locking ring 4 passes through the threaded surface 43 The force produced by screwing in the threaded surface 33 on the threaded frame body 3 squeezes the sealing ring 5, so that the sealing ring 5 produces effective sealing deformation; the gap between the threaded frame body 3 and the pipeline 6 is sealed. When the ring inner end face 47 of the threaded locking ring 4 is in contact with the outer end face 36 of the threaded frame body 3, the sealing ring 5 reaches the maximum sealing deformation, the threaded locking ring 4 cannot be advanced, and the protection sealing ring 5 will not deform and fail. When the sealing ring 5 in the sealing device achieves effective deformation, the first semi-annular body 1 and the second semi-annular body 2 of the outer shell close together and the inner cavity forms an annular installation groove, which has a small installation with the entire sealing device. Gap 104. When the sealing ring 5 in the sealing device does not achieve the best effective deformation, the threaded locking ring 4 at both ends of the sealing device 7 will resist the annular slopes 102 on both sides of the annular installation groove, and the annular slopes 102 on both sides of the annular installation groove will squeeze Press the outer end surface 44 of the threaded locking ring 4, the distance between the threaded surface 43 on the threaded locking ring 4 and the threaded surface 33 on the adjacent threaded frame body 3 is preferably greater than 1.5 times the effective deformation distance of the sealing ring , after the outer end surface 44 of the threaded locking ring 4 is squeezed, the threaded surface 43 of the threaded locking ring 4 is separated from the threaded surface 33 on the threaded frame body 3 in contact, and the threaded locking ring 4 is axially The threaded frame body 3 moves, and the inner end surface 41 of the threaded locking ring 4 squeezes the sealing ring 5, so that the sealing ring 5 produces effective sealing deformation. When the sealing device is placed in the annular installation groove, it is ensured that the sealing ring 5 produces effective sealing deformation to seal the gap between the threaded frame body 3 and the pipe 6 .

4 and 5 are structural schematic diagrams of the threaded frame body 3 and the threaded locking ring 4 respectively.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. The equivalent replacement or change of the new technical solution and the concept of the utility model shall be covered by the protection scope of the utility model.

Claims (7)

1. A threaded compression clamp type pipeline connection device, the device includes an outer shell and a sealing device, the outer shell is composed of a first semi-annular body (1) and a second semi-annular body (2), the first semi-annular body (1) and the second semi-annular body (2) are connected by a lockset member, and the inner side walls of the first semi-annular body (1) and the second semi-annular body (2) are respectively provided with semi-annular installation grooves (103), two The two semi-annular bodies close together to form an annular installation groove, the sealing device is located in the annular installation groove, and the both sides of the semi-annular installation groove (103) are respectively provided with an annular slope (102), it is characterized in that the sealing device is formed by a threaded frame body (3), two threaded locking rings (4) and sealing ring (5); the inner side of the two threaded locking rings (4) is provided with locking ring threads (42); the threaded The two ends of the frame body (3) are respectively provided with frame body threads (32), and the threaded locking ring (4) and the threaded frame body (3) are connected by the locking ring thread (42) and the frame body thread (32), The locking ring thread (42) and the frame body thread (32) are all non-standard large-pitch threads, and the thread surface (43) of the locking ring thread (42) and the thread of the adjacent frame body thread (32) The distance between the surfaces (33) is at least 1 times the effective deformation distance of the sealing ring (5); the two sides of the sealing ring (5) are respectively connected to the inner end surface (41) of the threaded locking ring (4) and the threaded frame body The sealing surface (31) of (3) offsets. 2. A threaded compression clamp type pipeline connection device according to claim 1, characterized in that, the outer end surface (44) of the threaded locking ring (4) is an inclined plane, and the outer end surface (44) Parallel to the annular slope (102) of the first semi-annular body (1) and the second semi-annular body (2). 3. A threaded compression clamp type pipeline connection device according to claim 1, characterized in that, between the inner end surface (41) of the threaded locking ring (4) and the locking ring thread (42) An annular boss (45) is provided, and the annular boss (45) is inserted into the threaded lower end surface (34) of the threaded frame body, and the inner end surface (46) of the annular boss (45), that is, the thread locking ring (4) The inner end face (41) of the seal ring (5) offsets. 4. A threaded compression clamp type pipeline connection device according to claim 1, characterized in that the number of the sealing rings (5) is a multiple of 2. 5. A threaded compression clamp type pipeline connection device according to claim 1, characterized in that, the thread surface (43) of the locking ring thread (42) and the adjacent frame body thread (32) The distance between the threaded surfaces (33) is 1.5 times the effective deformation distance of the sealing ring (5). 6 . The threaded compression clamp type pipeline connection device according to claim 4 , wherein a sealing retaining ring is provided between the sealing rings. 7 . 7. A threaded clamp type pipeline connection device according to claim 1, characterized in that the locking members are bolts (8) and nuts (9).