Copper pipe sealing device

Abstract

The utility model discloses a copper pipe fitting sealing device, including a connecting body, one end of the connecting body is provided with a sealing cavity which opens outward and whose diameter gradually shrinks inward, and the inner side wall of the sealing cavity is provided with convex parts at intervals along the axial direction, and groove parts are formed between adjacent convex parts. The utility model copper pipe fitting sealing device is provided with a sealing cavity at one end of the connecting body, and the diameter of the sealing cavity gradually shrinks inward and becomes smaller, and the inner side wall of the sealing cavity is provided with convex parts at intervals along the axial direction, and groove parts are formed between adjacent convex parts, so that in the process that the copper pipe gradually extends into the sealing cavity, the sealing end of the copper pipe is heated and shrunk and squeezed and deformed by the high-speed rotation of the copper pipe fitting sealing device, so that the pipe fitting is changed from an open shape to a closed cone shape, and sealing is achieved, and the sealing effect is good. The provision of the convex part and the groove part in the sealing cavity can not only increase friction to make the copper pipe easier to heat up, but also play a good role in avoiding air heat dissipation and avoiding air flying materials.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe connectors, and in particular relates to a copper pipe sealing device. Background Art

[0002] Copper pipe fittings have excellent thermal conductivity, good bending and deformation capabilities, high temperature and high pressure resistance, safety, reliability and corrosion resistance. They are often connected with metal pipes or cross-linked polyethylene pipes (PEX) and are widely used in waterways, refrigeration, HVAC and other fields.

[0003] Before installing a valve or faucet at the end of a pipeline, the pipeline is usually sealed. In the early days, plugs or pipe caps were used for sealing, which had a complex structure, high cost, and the risk of leakage.

[0004] The utility model with the authorization announcement number CN208099122U discloses a stainless steel pipe sealing machine, which includes a high-frequency heating tube, a sealing device, a clamping device, a bolt and a cylinder. The sealing device is provided with a sealing groove, and the sealing groove has a conical surface that shrinks inward. The clamping device includes an upper clamping block, a lower clamping block and a connecting block. When in use, the sealing device is set on a rotating component, the stainless steel pipe is placed in the lower clamping block, the upper clamping block is covered and then tightened with bolts, the cylinder drives the stainless steel pipe to extend into the high-frequency heating tube, the high-frequency heating tube heats the stainless steel pipe, and the end of the stainless steel pipe continues to extend forward into the sealing groove when it reaches a softened state, the sealing device rotates under the drive of the driving device, and the sealing groove uses friction to gradually shrink the end of the stainless steel pipe inward and squeeze and deform it until the end is sealed. In the prior art, the stainless steel pipe is sealed, and the stainless steel pipe is heated and softened by the heating tube, and then extended into the sealing groove, and the mouth of the stainless steel pipe is squeezed and deformed by the rotation and compression of the sealing groove until the sealing is completed. The prior art requires the use of a high-frequency heating tube to heat the stainless steel tube, and the overall structure is relatively complex and the operation process is cumbersome. The size of the high-frequency heating tube also limits the size of the stainless steel tube that can be processed, so the versatility is not good. Utility Model Content

[0005] The utility model aims at the above-mentioned deficiencies in the prior art and provides a copper pipe sealing device.

[0006] A copper pipe sealing device comprises a connecting body, one end of which is provided with a sealing cavity which opens outward and gradually shrinks inward in diameter, and an inner side wall of the sealing cavity is provided with convex portions at intervals along the axial direction, and a groove portion is formed between adjacent convex portions;

[0007] The other end of the connection body is provided with a connection head for connecting with a power mechanism, and the connection body is driven to rotate by the power mechanism so that the sealing end of the copper tube extending into the sealing cavity is heated and shrunk to achieve sealing of the sealing end.

[0008] The shape of the sealing cavity gradually shrinks from the mouth to the inside, so it can be a cone or a quasi-cone, an elliptical cone or a quasi-elliptical cone. The quasi-conical shape is a shape after the standard cone is deformed, for example, the waistline of the axial section is an arc convex outward. Similarly, the quasi-elliptical cone is a shape after the standard elliptical cone is deformed. Preferably, the sealing cavity is an arc cone shape. The arc cone shape will be smoother when rotating, extruding, and rubbing the sealing end of the copper tube.

[0009] Preferably, the protrusions are arranged in a plurality along the inner wall of the sealing cavity, and the width of each protrusion also gradually shrinks inwards. The protrusions and the grooves are arranged at intervals, which can generate lateral striking force on the copper tube sealing end during the rotation process, and at the same time increase friction, making it easier to heat up the copper tube sealing end. Combined with the specific shape of the sealing cavity, the copper tube sealing end completes the sealing process while gradually extending into the sealing cavity.

[0010] The number of the protrusions can generally be 3 to 10, preferably 4 to 6.

[0011] Further preferably, the circumferential sides of the protrusion and the groove are connected with arc-shaped guide surfaces. The provision of the arc-shaped guide surface can avoid the formation of a step structure at the connection, so as to avoid damage to the sealed end of the copper tube during rotation. In particular, if the protrusion and the groove have a large difference, it is more necessary to provide an arc-shaped guide surface.

[0012] Preferably, a receiving groove is provided at one end of the connecting body, an assembly part is installed in the receiving groove, and the sealing cavity is provided on the outward side of the assembly part; a fixing mechanism for fixing the assembly part in the receiving groove is provided between the connecting body and the assembly part.

[0013] That is to say, the sealing cavity is not directly arranged on the connecting body, but is designed as a split structure. If it is designed as an integrated structure, the size of the sealing cavity is fixed, and each copper pipe sealing device can only be used for a limited number of copper pipe models, and with use, the entire device can only be discarded after the raised part inside the sealing cavity is worn. If it is designed as a split structure, the assembly parts can be replaced to be suitable for different types of copper pipes; when the raised part inside the sealing cavity is worn, only the assembly part can be replaced without replacing the entire part. At the same time, the integrated structure also increases the difficulty of processing and manufacturing the copper pipe sealing device, while the split structure is relatively convenient to process and manufacture.

[0014] Preferably, the assembly part includes an embedded portion that at least partially extends into the accommodating groove, and an assembly portion that extends out of the accommodating groove, and the outline size of the assembly portion is smaller than the outline size of the embedded portion so as to form a step structure between the assembly portion and the embedded portion; the fixing mechanism includes a pressure plate inserted into the assembly portion, the end face of the pressure plate presses the step surface of the step structure, and the pressure plate is fixed to the end face of the connecting body by bolts.

[0015] Further preferably, the axial length of the embedded portion of the assembly part is slightly greater than the depth of the receiving groove. This slightly greater than is relatively subtle, for example, slightly greater than 0.5mm to 1mm. The purpose is to enable the pressing plate to press the assembly part tightly and prevent the assembly part from moving in the receiving groove.

[0016] Preferably, the receiving groove and the embedding portion are both cylindrical structures or polygonal prism structures. The polygonal prism structure can be a regular triangular prism structure, a regular quadrangular prism structure, a regular hexagonal prism structure, etc.

[0017] Preferably, the connection body is further provided with a vent hole with one end opening on one side surface of the connection body and the other end opening on the inner bottom surface of the receiving groove. The vent hole extends from the end surface of the connection head to the inner bottom surface of the receiving groove. The provision of the vent hole can facilitate the discharge of gas in the receiving groove when the assembly is installed in the receiving groove.

[0018] Preferably, the connector is a special-shaped structure protruding from the middle of one end of the connecting body. The specific shape of the special-shaped structure can be selected according to the shape of the installation location of the supporting power mechanism, for example, a cylindrical shape with part of the arc surface cut off, a regular quadrangular prism, or a regular hexagonal prism. The power mechanism can be a device that can drive the copper pipe sealing device of the present application to rotate, such as a motor.

[0019] The utility model copper pipe sealing device is provided with a sealing cavity at one end of the connecting body, the diameter of the sealing cavity gradually shrinks inwards and becomes smaller, and the inner side wall of the sealing cavity is provided with convex parts at intervals along the axial direction, and groove parts are formed between adjacent convex parts, so that when the copper pipe gradually extends into the sealing cavity, the sealing end of the copper pipe is heated and shrunk and squeezed and deformed by the high-speed rotation of the copper pipe sealing device, so that the pipe is changed from an open shape to a closed cone shape, and the sealing is achieved with good sealing effect. The setting of the convex part and the groove part in the sealing cavity can not only increase friction to make the copper pipe easier to heat up, but also play a good role in avoiding air heat dissipation and avoiding air flying materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure is a schematic diagram of the explosion structure of the copper pipe sealing device of the utility model.

[0021] Figure 2The utility model is a schematic cross-sectional structure diagram of the copper pipe sealing device.

[0022] Figure 3 It is a schematic diagram of the side view structure of the assembly.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the assembly.

[0024] Figure 5 It is a schematic diagram of the cross-sectional structure of the assembly.

[0025] Reference numerals:

[0026] Connecting body 1, receiving groove 11, connecting head 12, vent hole 13, threaded mounting hole 14,

[0027] Assembly part 2, embedding part 21, assembly part 22, sealing cavity 23, raised part 24, groove part 25, arc-shaped guide surface 26,

[0028] Pressing plate 3, mounting hole 31, avoidance hole 32. DETAILED DESCRIPTION

[0029] like Figure 1 and 2 As shown, a copper pipe sealing device includes a connecting body 1, which is cylindrical as a whole, and a receiving groove 11 is provided at one end of the connecting body 1, and a fitting 2 is installed in the receiving groove 11, and a sealing cavity 23 is provided on the outward side of the fitting 2. A fixing mechanism for fixing the fitting 2 in the receiving groove 11 is provided between the connecting body 1 and the fitting 2.

[0030] The assembly part 2 includes an embedding portion 21 at least partially extending into the accommodating groove 11, and an assembly portion 22 extending outside the accommodating groove 11. The outline size of the assembly portion 22 is smaller than the outline size of the embedding portion 21, so that a step structure is formed between the assembly portion 22 and the embedding portion 21.

[0031] The fixing mechanism includes a pressing plate 3 which is sleeved on the assembly part 22. The pressing plate 3 is a circular ring structure with a relief hole 32 in the middle. The end face of the pressing plate 3 presses the step surface of the step structure, and the assembly part 22 extends from the relief hole 32. The pressing plate 3 is fixed to the end face of the connecting body 1 by bolts (not shown in the figure). Among them, a plurality of threaded mounting holes 14 are provided on the end face of the connecting body 1, and mounting holes 31 are correspondingly provided on the pressing plate 3. After the bolts pass through the mounting holes 31, they are threadedly matched with the threaded mounting holes 14 to fix the pressing plate 3 on the connecting body 1. The pressing plate 3 then fixes the assembly part 2 in the receiving groove 11.

[0032] The axial length of the embedded portion 21 of the assembly part 2 is slightly greater than the depth of the receiving groove 11. This slightly greater than is relatively subtle, for example, slightly greater than 0.5mm to 1mm. The purpose is to enable the pressing plate to press the assembly part tightly and prevent the assembly part from moving in the receiving groove.

[0033] In the structure shown in the figure, the receiving groove 11 and the embedding portion 21 are both cylindrical structures or polygonal prism structures. The polygonal prism structure can be a regular triangular prism structure, a regular quadrangular prism structure, a regular hexagonal prism structure, etc.

[0034] The other end of the connecting body 1 away from the receiving groove 11 is provided with a connecting head 12 for connecting with the power mechanism. The connecting head 12 and the connecting body 1 are an integral structure.

[0035] The connector 12 is a special-shaped structure protruding from the middle of one end of the connecting body 1. The specific shape of the special-shaped structure can be selected according to the shape of the installation location of the supporting power mechanism, for example, a cylindrical shape with part of the arc surface cut off, a regular quadrangular prism, or a regular hexagonal prism. The power mechanism can be a device that can drive the copper pipe sealing device of the present application to rotate, such as a motor.

[0036] The connection body 1 is also provided with a vent hole 13, one end of which is open on one side surface of the connection body 1 and the other end of which is open on the inner bottom surface of the receiving groove 11. The vent hole 13 extends from the end surface of the connector 12 to the inner bottom surface of the receiving groove 11. The provision of the vent hole 13 can facilitate the discharge of gas in the receiving groove 11 when the assembly part 2 is installed in the receiving groove 11.

[0037] like Figures 3 to 5 As shown, a sealing cavity 23 is provided on the end surface of the assembly part 22 of the assembly part 2. The sealing cavity 23 opens outward and its diameter gradually shrinks inward. The inner wall of the sealing cavity 23 is provided with convex portions 24 at intervals along the axial direction, and groove portions 25 are formed between adjacent convex portions 24.

[0038] The shape of the sealing cavity 23 gradually shrinks from the mouth to the inside, so it can be a cone or a quasi-cone, an elliptical cone or a quasi-elliptical cone. The quasi-cone is a shape after the standard cone is deformed, for example, the waistline of the axial section is an arc convex outward. Similarly, the quasi-elliptical cone is a shape after the standard elliptical cone is deformed. In the structure shown in the figure, the sealing cavity 23 is an arc cone shape. The arc cone shape will be smoother when rotating, extruding, and rubbing the sealing end of the copper tube.

[0039] The arrangement of the raised portion 24 and the groove portion 25 in the sealing cavity 23 can not only increase friction to make the copper tube heat up more easily, but also play a good role in avoiding air heat dissipation and avoiding flying materials.

[0040] There are multiple protrusions 24 arranged at intervals along the inner wall of the sealing cavity 23, and the width of each protrusion 24 also gradually shrinks inwardly. The protrusions 24 and the grooves 25 are arranged at intervals, which can generate lateral striking force on the copper tube sealing end during the rotation process, and at the same time increase friction, making it easier for the copper tube sealing end to heat up. Combined with the specific shape of the sealing cavity 23, the copper tube sealing end completes the sealing process while gradually extending into the sealing cavity 23.

[0041] The number of the protrusions 24 can generally be 3 to 10, and preferably 4 to 6.

[0042] The circumferential sides of the protrusion 24 are connected to the groove 25 with arc-shaped guide surfaces 26. The provision of the arc-shaped guide surfaces 26 can avoid the formation of a step structure at the connection, so as to avoid damage to the sealed end of the copper tube during the rotation operation. In particular, if the height difference between the protrusion 24 and the groove 25 is large, it is more necessary to provide the arc-shaped guide surfaces 26.

[0043] When assembling the copper pipe sealing device of the present invention, one end of the embedded portion 21 of the assembly part 2 is inserted into the accommodating groove 11 of the connecting body 1, and then the pressing plate 3 is sleeved on the assembly part 22, and the pressing plate 3 is fixed to the connecting body 1 with bolts, and the pressing plate 3 presses and fixes the assembly part 2.

[0044] When in use, the copper pipe sealing device of the utility model is installed on the power mechanism through the connecting head 12, and the copper pipe sealing device of the utility model is driven by the power mechanism to rotate at a high speed as a whole. In the process of gradually extending the sealed end of the copper pipe into the sealing cavity 23, the sealed end of the copper pipe shrinks and is squeezed and deformed by heat, so that the pipe fitting changes from an open shape to a closed cone shape, thereby achieving sealing, and the sealing effect is good.

Claims

1. A copper pipe sealing device, characterized in that: It comprises a connecting body, one end of which is provided with a sealing cavity which opens outward and gradually shrinks inward in diameter, and the inner side wall of the sealing cavity is provided with convex parts at intervals along the axial direction, and a groove part is formed between adjacent convex parts; The other end of the connection body is provided with a connection head for connecting with a power mechanism, and the connection body is driven to rotate by the power mechanism so that the sealing end of the copper tube extending into the sealing cavity is heated and shrunk to achieve sealing of the sealing end.

2. The copper pipe sealing device according to claim 1, characterized in that: The sealing cavity is in the shape of an arc cone.

3. The copper pipe sealing device according to claim 1 or 2, characterized in that: The protrusions are multiple and spaced apart along the inner wall of the sealing cavity, and the width of each protrusion also gradually shrinks inwards.

4. The copper pipe sealing device according to claim 3, characterized in that: Arc-shaped guiding surfaces are provided at the locations where the two circumferential sides of the protrusion meet the groove portion.

5. The copper pipe sealing device according to claim 1 or 2, characterized in that: One end of the connecting body is provided with a receiving groove, an assembly part is installed in the receiving groove, and the sealing cavity is provided on the outward side of the assembly part; A fixing mechanism for fixing the assembly part in the accommodating groove is provided between the connecting body and the assembly part.

6. The copper pipe sealing device according to claim 5, characterized in that: The assembly part includes an embedding portion at least partially extending into the accommodating groove, and an assembly portion extending out of the accommodating groove, wherein the outline size of the assembly portion is smaller than the outline size of the embedding portion so as to form a step structure between the assembly portion and the embedding portion; The fixing mechanism comprises a pressing plate sleeved on the assembly portion, the end surface of the pressing plate presses the step surface of the step structure, and the pressing plate is fixed to the end surface of the connecting body by bolts.

7. The copper pipe sealing device according to claim 6, characterized in that: The axial length of the embedding portion of the assembly part is slightly greater than the depth of the accommodating groove.

8. The copper pipe sealing device according to claim 6, characterized in that: The accommodating groove and the embedding portion are both cylindrical structures or polygonal prism structures.

9. The copper pipe sealing device according to claim 6, characterized in that: The connecting body is also provided with a vent hole with one end opening on one side surface of the connecting body and the other end opening on the inner bottom surface of the containing groove.

10. The copper pipe sealing device according to claim 9, characterized in that: The vent hole extends from the end surface of the connector to the inner bottom surface of the accommodating groove.

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