Pipe-up compression coupling

Abstract

The application discloses a pipeline tightening compression joint, which comprises a circular joint inner core, a joint compression sleeve and a joint outer sleeve. The outer side of the joint inner core is provided with a protruding part, and the inner side of the joint compression sleeve is provided with a clamping groove part corresponding to the protruding part. The joint compression sleeve is composed of several arc-shaped pieces which are movably connected. The surface of the joint compression sleeve and the joint outer sleeve is an inclined surface. The outer surface of the joint compression sleeve is provided with grooves at intervals. An arched spring piece is arranged in each groove. An iron piece is arranged above the spring piece. One end of the iron piece is connected with the side surface of the groove through a pin, and the other end of the iron piece extends out of the groove. The inner wall of the joint outer sleeve is provided with a clamping groove which is recessed and corresponds to the groove. Corresponding connecting holes are arranged on the outer side flanges of the joint outer sleeve and the joint inner core. The joint locking force is realized by the inclined surface sliding, the hose is clamped, the self-locking structure is increased, the structure is light and compact, the joint connection firmness is high, the installation efficiency is fast, and the installation cost is low.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of pipe connection, and particularly relates to a pipe tightening compression joint. BACKGROUND

[0002] At present, the soft pipe joint technology mostly adopts glue injection compression (for large-diameter pipes), radial direct shrinkage compression (for small-diameter pipes) or mechanical inner account outer buckle forms.

[0003] The existing soft pipe joint technology has the following defects:

[0004] 1. Glue joint: high cost, inconvenient on-site construction (electricity and high-pressure glue injection equipment need to be configured), and the compressed part is prone to rebound after pressure relief, resulting in limited joint and pipe combination firmness, especially for heat and heat pipe repair.

[0005] 2. Radial direct tightening compression joint: a joint for small-diameter soft pipes, generally composed of 2-3 compressible sleeves. However, for large-diameter soft pipes, the number of compressible sleeves is larger, and it is difficult to control the gap precision of each sleeve during installation. During compression, each compression sleeve cannot be synchronized, and the locking force during compression is not consistent, resulting in inconsistent tightness of each sleeve.

[0006] 3. Inner account, outer buckle, inner account and outer buckle joint: inconvenient on-site construction (electricity and high-pressure glue injection equipment need to be configured), and the compressed part is prone to rebound after pressure relief, resulting in limited joint and pipe combination firmness, especially for heat and heat pipe repair, with time and continuous high temperature, the stress relaxation of inner lining and outer covering material, the joint loosens especially obviously. SUMMARY

[0007] To solve the above problems, the present application discloses a pipe tightening compression joint, which has a novel and convenient structure, uses inclined surface sliding to realize joint locking force, and increases self-locking structure to improve the firmness of joint connection, has high installation efficiency and low installation cost.

[0008] To achieve the above purpose, the technical scheme of the present application is as follows:

[0009] A pipeline tightening compression joint comprises a circular joint inner core, a joint compression sleeve, and a joint outer sleeve, wherein the outer side of the joint inner core is provided with a protruding part, the inner side of the joint compression sleeve is provided with a clamping groove part corresponding to the protruding part, the joint compression sleeve is composed of several arc-shaped pieces connected movably, the joint compression sleeve is wrapped on the outer side of the joint inner core, the joint outer sleeve is arranged on the outer side of the joint compression sleeve, the joint compression sleeve and the joint outer sleeve are in contact with the inclined surface, the outer surface of the joint compression sleeve is provided with grooves at intervals, an arched spring piece is arranged in each groove, an iron piece is arranged above the spring piece, one end of the iron piece is connected with the side surface of the groove through a pin, and the other end of the iron piece extends out of the groove, the inner wall of the joint outer sleeve is provided with a clamping groove corresponding to the groove, and the joint outer sleeve and the flange on the outer side of the joint inner core are provided with corresponding connecting holes.

[0010] As an improvement of the present application, the clamping groove is in the shape of a right-angled triangle, and the right-angled side is arranged at one end close to the flange.

[0011] As an improvement of the present application, the outer surface of the joint compression sleeve is provided with grooves at equal intervals.

[0012] As an improvement of the present application, the protruding part is an isosceles trapezoidal block, and the clamping groove part is a U-shaped groove.

[0013] As an improvement of the present application, the connecting hole of the flange on the outer side of the joint inner core is a counter-sunk hole.

[0014] The use method of the pipeline tightening compression joint comprises the following steps:

[0015] (1) the joint outer sleeve is first threaded through the hose, and then the joint inner core is threaded through the hose,

[0016] (2) the joint inner core is moved to the position where the joint is needed to be installed on the hose, and the joint compression sleeve is wrapped on the outer side of the joint inner core,

[0017] (3) the joint outer sleeve is further moved along the outer wall of the joint compression sleeve to the end of the joint inner core;

[0018] (4) the bolts are arranged on the joint outer sleeve and the flange on the outer side of the joint inner core, the bolts are fixed on the end of the joint inner core, the joint outer sleeve is moved to the end of the joint inner core while the bolts are tightened, so that the joint compression sleeve, the hose, and the joint inner core are tightly attached.

[0019] The outer surface of the joint compression sleeve is provided with grooves at intervals, and an arched spring sheet and an iron sheet are arranged in each groove. The iron sheet is arranged above the spring sheet, and one end of the iron sheet is connected to the side surface of the groove through a pin, and the other end of the iron sheet extends out of the groove and is higher than the surface of the joint compression sleeve. The inner side of the joint sleeve is provided with a plurality of recessed clamping grooves. When the joint sleeve moves towards the end of the joint core, the inner wall of the joint sleeve will press down the iron sheet when the joint sleeve passes through the groove, and the iron sheet will be raised again when the clamping groove passes through, so that the joint sleeve cannot be retracted. With the further movement of the joint sleeve towards the end of the joint core, the joint and the hose are tightly locked.

[0020] The bolt in step (3) is finally removed.

[0021] The beneficial effects of the present application are:

[0022] The present application adopts a tightening bolt to drive the joint sleeve, adopts a beveled surface sliding to realize joint locking force, thereby clamping the hose, and increases a self-locking structure, so that no power supply equipment is needed, the structure is light and compact, the bolt parts thereon can be removed subsequently, and no rusting and wearing phenomenon occurs. The structure is novel and convenient, the joint connection firmness is high, the installation efficiency is fast, and the installation cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The present application is a structural schematic diagram.

[0024] Figure 2 The present application is a self-locking device connection schematic diagram.

[0025] Figure 3 The present application is a joint core schematic diagram.

[0026] Figure 4 The present application is a joint compression sleeve schematic diagram.

[0027] Figure 5 The present application is a joint sleeve schematic diagram.

[0028] LIST OF FIGURES

[0029] 1, joint core, 2, joint compression sleeve, 3, joint sleeve, 4, protruding part, 5, clamping groove part, 6, arc-shaped sheet, 7, groove, 8, spring sheet, 9, iron sheet, 10, clamping groove, 11, flange, 12, connecting hole, 13, counterbore, 14, bolt, 15, hose. DETAILED DESCRIPTION

[0030] The present application will be further illustrated in conjunction with the drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present application and are not used to limit the scope of the present application.

[0031] As shown in the figure, the present invention is a pipe tightening compression joint, when the pipe joint is installed, Figure 2 As shown, first pass the connector sleeve 3 through the hose 15, then pass the connector core 1 through the hose. Move the connector core 1 to the location on the hose where the connector is to be installed. Cover the connector core with the connector compression sleeve 2, and then move the connector sleeve 3 along the outer wall of the connector compression sleeve 2 toward the end of the connector core. Bolts 14 are provided on the connector sleeve 3 and the connector core 1, and are fixed in the countersunk holes 13 at the end of the connector core 1. As the bolts are tightened, the connector sleeve 3 is driven toward the end of the connector core 1, thereby tightly fitting the connector compression sleeve 2, the hose 15, and the connector core 1.

[0032] There are corresponding protrusions 4 and grooves 5 on the joint inner core 1 and the joint compression sleeve 2, and the hose 15 is placed between the two; the joint compression sleeve 2 is composed of several detachable and movably connected arc-shaped pieces 6, which are sleeved on the joint inner core 1 to cover the outer surface of the hose 15; the surfaces where the joint compression sleeve 2 and the joint outer sleeve 3 fit together are inclined surfaces. When the joint outer sleeve 3 moves toward the end of the joint inner core 1, under the action of the extrusion force, the joint compression sleeve 2 is gradually squeezed toward the joint inner core 1, thereby tightly clamping the hose 15 between the two.

[0033] The present invention also adds a self-locking device, such as Figure 2 and 4 As shown, small grooves 7 are spaced apart on the outer surface of the joint compression sleeve 2, and a raised spring sheet 8 and a thick iron sheet 9 are placed inside each groove 7. Since the iron sheet is placed above the spring sheet, when the spring sheet is set on the right side of the groove, the left side of the iron sheet will be tilted up and higher than the surface of the joint compression sleeve. The inner side of the joint jacket is provided with multiple circles of recessed grooves 10 (the grooves 10 described in the present invention are in the shape of a right triangle, and their right angles are set at one end close to the flange). In the process of the joint jacket moving toward the end of the joint inner core, when the joint jacket passes through the grooves 7, the inner wall will press down the iron sheet 9, and when passing through the grooves 10, the iron sheet 9 will be tilted up again, making it impossible for the joint jacket 3 to retract. According to the actual combination of the hose and the joint, the joint jacket can be further moved toward the end of the joint inner core until the joint and the hose are firmly locked.

[0034] Due to the unique characteristics of thermal pipes, which primarily transport media such as hot water and steam, the screws and bolts used in the installation structure of thermal pipe joints are prone to rust and damage. This solution uses tightening bolts to drive the joint jacket, which in turn secures the hose. This solution eliminates the need for power distribution equipment, offers a lightweight structure, and bolts can be removed later, preventing rust and wear.

[0035] The convex part 4 is an isosceles trapezoidal block, and the clamping groove part 5 is a U-shaped groove, so that the friction of the joint and the sealing performance are increased.

[0036] The joint locking force is realized by the inclined surface sliding.

[0037] The self-locking structure (cannot slide out after locking) is designed to prevent the joint compression sleeve from sliding and loosening.

[0038] There is no rebound phenomenon caused by compression, and precise installation is not required, so that the displacement risk of the joint compression sleeve is reduced.

[0039] The compression stroke of the joint sleeve can be well unified when the joint compression sleeve is compressed.

[0040] In addition, the number of circumferential locking bolts is determined according to the size of the installation caliber.

[0041] It should be noted that the above content only illustrates the technical idea of the present application, and cannot limit the protection scope of the present application. For ordinary skilled persons in the art, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements fall within the protection scope of the claims of the present application.

Claims

1. A pipe make-up compression coupling, characterised in that: The joint inner core is provided with a protruding part on the outside, the joint compression sleeve is provided with a clamping groove part corresponding to the protruding part on the inside, the joint compression sleeve is composed of several arc-shaped pieces which are movably connected, the joint compression sleeve is covered on the outside of the joint inner core, the joint outer sleeve is arranged on the outside of the joint compression sleeve, the joint compression sleeve and the joint outer sleeve are in contact with the inclined surface, a plurality of grooves are arranged on the outer surface of the joint compression sleeve at equal distances, an arched spring piece is arranged in each groove, an iron piece is arranged above the spring piece, one end of the iron piece is connected with the side surface of the groove through a pin, the other end of the iron piece extends out of the groove, the inner wall of the joint outer sleeve is provided with a clamping groove which is recessed and corresponds to the groove, the clamping groove is in the shape of a right-angled triangle, and the right-angled side is arranged at one end close to the flange; the joint outer sleeve and the flange on the outside of the joint inner core are provided with corresponding connecting holes, bolts for assisting installation are arranged in the connecting holes during installation, and the bolts can be removed after installation is completed.

2. A pipe compression coupling as defined in claim 1 wherein: The protruding part is an isosceles trapezoidal block, and the clamping groove part is a U-shaped groove.

3. A pipe compression coupling as defined in claim 1 wherein: The connecting hole of the flange on the outside of the joint inner core is a counter-sunk hole.

4. The method of using a pipe constricting compression coupling according to claim 1, wherein: The method comprises the following steps: (1) first, the joint outer sleeve is passed through the hose, and then the joint inner core is passed through the hose; (2) the joint inner core is moved to the position of the hose where the joint needs to be installed, and the joint compression sleeve is covered on the outside of the joint inner core; (3) then, the joint outer sleeve is moved along the outer wall of the joint compression sleeve to the end of the joint inner core; (4) the bolts are arranged on the joint outer sleeve and the flange on the outside of the joint inner core, the bolts are fixed on the end of the joint inner core, the joint outer sleeve is driven to move to the end of the joint inner core while the bolts are tightened, so that the joint compression sleeve, the hose and the joint inner core are tightly attached to each other; In step (3), grooves are arranged on the outer surface of the joint compression sleeve at equal distances, an arched spring piece and an iron piece are arranged in each groove, the iron piece is arranged above the spring piece, one end of the iron piece is connected with the side surface of the groove through a pin, the other end of the iron piece extends out of the groove and is higher than the surface of the joint compression sleeve, the inside of the joint outer sleeve is provided with multiple recessed clamping grooves, when the joint outer sleeve passes through the groove during the movement of the joint outer sleeve to the end of the joint inner core, the inner wall will press down the iron piece, and when the clamping groove passes, the iron piece will be raised again, so that the joint outer sleeve cannot be retracted; with the further movement of the joint outer sleeve to the end of the joint inner core, the joint and the hose are tightly locked; (5) after the one-way locking of the self-locking mechanism is confirmed, the installation is completed, and finally the bolts in step (3) are removed.

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