Internal thread connector

Abstract

The utility model provides an internal thread connector which comprises a connecting pipe and caps, and the caps are detachably fixed to the two ends of the connecting pipe in an inserted connection mode. The cap comprises a cap body and an inner pipe, the inner pipe comprises a first end and a second end, the first end of the inner pipe is concentrically fixed to the inner side face of the cap body, a round hole is formed in the cap body, the inner diameter of the round hole is the same as that of the inner pipe, and a sealing ring is further arranged in the cap body and arranged on the outer side of the inner pipe in a sleeving mode. The end of the connecting pipe abuts against the sealing ring, and threads are arranged on the inner wall of the inner pipe. Cracking caused by expansion caused by heat and contraction caused by cold during use is avoided, the detachable structure is beneficial to replacement when part of components of the internal thread connector are damaged, waste of resources is avoided, disassembly and replacement are fast, time waste is reduced, installation and operation are easy and convenient, and limitation of the space size of an installation area and the weight and size of the components is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline joints, in particular to an internal thread joint. Background Art

[0002] The female thread connector is a common pipe connector, which is used to connect, extend or turn pipes in the pipe system. This connector is widely used in many fields such as industry, automobile transportation, construction, sewage treatment, agriculture, electric power, aerospace, etc. However, the existing female thread connector is often simple in structure, and is often a short tube with an integrated design, and the inner wall of the short tube at both ends is tapped. The existing female thread connector often has the following problems: (1) When the existing female thread connector is used for a long time, due to changes in temperature, it will expand and contract due to heat and cold. The existing integrated female thread connector has poor thermal expansion and contraction compensation effect and is prone to cracking; (2) When the existing female thread connector is replaced, it needs to be dismantled as a whole, and it is impossible to replace some components, resulting in a waste of resources. When replacing, both ends of the female thread connector need to be disassembled, and the dismantling is slow; (3) The installation of the existing female thread connector is inconvenient. Since the existing connector is integrated, when installing the connector, it is necessary to first fix one end and then connect the other end to other components through threads. The thread installation of both ends of the connector cannot be performed at the same time. When the installation space is small, or the connected components are large or heavy, it is extremely inconvenient to rotate the installation components. Summary of the invention

[0003] In view of the above problems, the utility model provides an internal thread connector.

[0004] To achieve the above object, the utility model adopts the following technical solution: an internal thread connector, comprising a connecting pipe and a cap, wherein the cap is detachably fixed to both ends of the connecting pipe through a plug-in connection;

[0005] The cover cap includes a cover body and an inner tube, the inner tube includes a first end and a second end, the first end of the inner tube is concentrically fixed to the inner side surface of the cover body, the cover body is provided with a circular hole, the circular hole has the same inner diameter as the inner tube, a sealing ring is further provided inside the cover body, and the sealing ring is sleeved on the outer side of the inner tube; the end of the connecting tube abuts against the sealing ring, and the inner wall of the inner tube is provided with a thread.

[0006] Furthermore, an elastic clamping bundle is concentrically fixed on the side wall of the cover opening of the cover body, and a clamping block is fixed on the inner side of one end of the elastic clamping bundle away from the cover body.

[0007] Furthermore, annular ridges are respectively arranged around the circumference of the connecting pipe near both ends of the connecting pipe, the side of the clamping block facing the cover body abuts against the side of the annular ridge away from the end, and the cover cap clamps the annular ridge through the clamping block.

[0008] Furthermore, the side surface of the annular ridge facing the end of the connecting pipe is a sloped surface.

[0009] Furthermore, a notch is provided at the second end of the inner tube, and the notch is semicircular or semi-oblong, and the notch is connected to the end of the inner tube with a rounded corner or a chamfered corner.

[0010] Furthermore, the middle portion of the connecting pipe is a corrugated pipe.

[0011] Furthermore, the elastic clamping bundle is an arc-shaped plate, and the elastic clamping bundle is equidistantly arranged around the circumference of the cover body.

[0012] Furthermore, the cover cap is made by integral casting.

[0013] Furthermore, the side surface of the block facing inward is an arc-shaped surface.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: (1) The inner tube of the utility model is designed with a notch and the middle part of the connecting tube is designed as a bellows design. The notch provides deformation compensation for thermal expansion and contraction for the inner tube, allowing the inner tube to deform more flexibly during thermal expansion or contraction, reducing the impact of thermal stress on the structure and preventing the inner tube from cracking and damage. The connecting tube with a wavy structure is more flexible and can adapt to thermal expansion and contraction caused by temperature changes. This ensures that the device can be used in high temperature environments or in conditions with large temperature changes, avoiding cracking caused by thermal expansion and contraction during use of the utility model; (2) The detachable structure of the utility model is conducive to the replacement of some components of the inner thread connector when they are damaged, without the need to dismantle the entire device, thus avoiding waste of resources. Both ends of the connecting pipe are connected to the caps through a detachable structure. Unless the caps on both sides or the components connected by the caps are damaged at the same time, it is necessary to remove the threaded connection of the components on both sides. In other cases of damage, only one side of the threaded structure needs to be removed for replacement. The removal and replacement are faster, reducing time waste; (3) The installation operation of the utility model is simple and convenient, ensuring that the connector of the utility model does not need to be installed in sequence at both ends. Different workers can simultaneously install the components at both ends with threads. The plug-in connection is simple and convenient, saving installation time. At the same time, the caps at both ends can be removed and connected to the components through threads, which is not limited by the size of the space in the installation area, or the weight and size of the components. It is easy to install and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of an internal thread connector of the utility model;

[0016] Figure 2 The utility model is a three-dimensional structural schematic diagram of a cover cap of an internal thread connector. Implementation

[0017] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0018] Please refer to Figure 1 , Figure 2 An internal thread connector of one embodiment of the utility model comprises a connecting tube 100 and a cap 200, wherein the cap 200 comprises a cover body 210 and an inner tube 220, wherein the inner tube 220 comprises a first end 221 and a second end 222, wherein the first end 221 of the inner tube is concentrically fixed to the inner side surface of the cover body 210, wherein the cover body 210 is provided with a circular hole 211, wherein the circular hole 211 has the same inner diameter as the inner tube 220, and the cover body 210 is further provided with a sealing ring 300, wherein the sealing ring 300 is sleeved on the outer side of the inner tube 220; the end of the connecting tube 100 abuts against the sealing ring 300, and the inner wall of the inner tube 220 is provided with a thread. The cap 200 is detachably fixed to the two ends of the connecting tube 100 by a plug-in connection. The detachable structure of the utility model is conducive to the replacement of some components of the internal thread connector when they are damaged, and it is not necessary to dismantle the entire component, thereby avoiding waste of resources. Both ends of the connecting tube 100 are connected to the caps 200 through a detachable structure. Unless the caps 200 on both sides or the components connected to the caps are damaged at the same time, it is necessary to remove the threaded connection of the components on both sides. In other damage situations, only one side of the threaded structure needs to be removed for replacement, which is faster to disassemble and replace, reducing time waste.

[0019] When in use, first remove the caps 200 at both ends of the connecting tube 100, and then the caps 200 can be connected to the components to be fixed through the threads of the inner tube at the same time or separately. After the components are fixed, the inner tube 220 is inserted and installed from the end of the connecting tube 100, and the caps 200 are directly fixed to the two ends of the connecting tube 100 through the plug-in connection. The installation operation is simple and convenient, ensuring that the connector of the utility model does not need to be installed at both ends in sequence, and different workers can perform the threaded installation of the components at both ends at the same time. The plug-in connection is simple and convenient, saving installation time. At the same time, the caps 200 at both ends can be removed and connected to the components through threads, which is not limited by the size of the space in the installation area, or the weight and size of the components. It is easy to install and has a wide range of applications.

[0020] like Figure 2An elastic clamping bundle 230 is concentrically fixed on the side wall of the cover opening of the cover body 210, and a clamping block 231 is fixed on the inner side of the end of the elastic clamping bundle 230 away from the cover body. At least three elastic clamping bundles are provided, and an annular ridge 110 arranged around the circumference of the connecting pipe is respectively provided near the two ends of the connecting pipe 100. The side of the clamping block 231 facing the cover body 210 conflicts with the side of the annular ridge 110 away from the end, and the cap 200 clamps the annular ridge 110 through the clamping block 231. The diameter of the circle formed by the inner side of the clamping block 231 is larger than the outer diameter of the connecting pipe 100, and smaller than the outer diameter of the annular ridge 110. This ensures that the cover body 210 can be fixed on the outer side of the connecting pipe 100 and can clamp the annular ridge 110. When in use, the cap is fixed on the end of the connecting tube 100. When the block 231 contacts the annular ridge 110, the elastic fixing bundle 230 will be deformed outward. When the block 231 continues to move toward the middle of the connecting tube 100, when the top of the annular ridge 110 no longer contacts the block 231, the elastic fixing bundle 230 restores its deformation, thereby being fixed to the end of the connecting tube 100 to prevent the cap 200 from falling off. The connection is simple and convenient through the snap-on fixing method.

[0021] The side surface of the end of the annular ridge 110 facing the connecting pipe 100 is a slope surface. When the clamping block 231 contacts the annular ridge 110, the elastic clamping bundle 230 can be deformed step by step, so that the clamping block 231 on the cover body 210 can easily clamp the annular ridge 110, which is more convenient for installation and practical use.

[0022] The second end 222 of the inner tube 220 is provided with a notch 223, and the notch 223 is semicircular or semi-oblong, and the notch 223 is connected to the end of the inner tube 220 by a rounded corner or a chamfered corner. The notch 223 provides deformation compensation for thermal expansion and contraction for the inner tube 220, allowing the inner tube 220 to deform more flexibly during thermal expansion or contraction, reducing the impact of thermal stress on the structure, and preventing the inner tube 220 from cracking and damage. At the same time, the structural design of the notch ensures that the corners of the notch 223 are relatively rounded, avoiding cracking of the notch 223 at the corners, which affects the service life of the inner tube 220. At the same time, the rounded or chamfered design can improve the strength, avoid cracks, and extend the service life. It also helps to reduce the risk of injury when touching parts and facilitates the installation of the cap.

[0023] The middle part of the connecting pipe 100 is a bellows 120. The connecting pipe 100 of the utility model is ensured to have high pressure resistance. The bellows 120 is more likely to absorb vibration and deformation due to its flexibility and wave shape, thereby improving its resistance to fatigue cycles. The wave-shaped structure is more flexible and can adapt to thermal expansion and contraction caused by temperature changes. It is ensured that the device can be used in high temperature environments or when the temperature changes greatly. In addition, the design of the bellows 120 reduces the noise and vibration generated when the fluid flows in the pipeline.

[0024] The elastic clamping bundle 230 is an arc-shaped plate, and the elastic clamping bundle 230 is equidistantly arranged around the circumference of the cover body 210. The uniform distribution ensures that the structure of the cap 200 is beautiful, and the elastic clamping bundle 230 can be evenly stressed. At the same time, the design of the arc-shaped plate has the functions of guiding and positioning, which facilitates the connection between the connecting pipe 100 and the cap 200. The arc-shaped plate is also easy to recover deformation, ensuring the buckle connection between the cap and the connecting pipe.

[0025] The cap 200 is made of an integrated casting. The connection strength of each component of the cap 200 is high, which avoids the fracture of the connection, increases the service life of the cap 200, and prolongs the life of the utility model.

[0026] The side surface of the block 231 facing the inside is an arc surface. The arc surface reduces the area of ​​the block contacting the upper surface of the annular ridge during installation, thereby reducing resistance and facilitating installation, while having better pressure resistance, reducing stress concentration, and improving the life and durability of the block 231.

[0027] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, any changes and modifications made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A female thread connector, characterized in that: It comprises a connecting pipe and a cover cap, wherein the cover cap is detachably fixed to the two ends of the connecting pipe through a plug-in connection; The cover cap includes a cover body and an inner tube, the inner tube includes a first end and a second end, the first end of the inner tube is concentrically fixed to the inner side surface of the cover body, the cover body is provided with a circular hole, the circular hole has the same inner diameter as the inner tube, a sealing ring is further provided inside the cover body, and the sealing ring is sleeved on the outer side of the inner tube; the end of the connecting tube abuts against the sealing ring, and the inner wall of the inner tube is provided with a thread.

2. A female thread connector as claimed in claim 1, characterized in that: An elastic clamping bundle is coaxially fixed on the side wall of the cover opening of the cover body, and a clamping block is fixed on the inner side of an end of the elastic clamping bundle away from the cover body.

3. A female thread connector as claimed in claim 2, characterized in that: Annular ridges are arranged around the circumference of the connecting pipe near both ends of the connecting pipe, the side of the clamping block facing the cover body abuts against the side of the annular ridge away from the end, and the cap clamps the annular ridge through the clamping block.

4. A female thread connector as claimed in claim 3, characterized in that: The side surface of the annular convex ridge facing the end of the connecting pipe is a slope surface.

5. The female thread connector according to claim 1, characterized in that: The second end of the inner tube is provided with a notch, the notch is semicircular or semi-oblong, and the notch is connected to the end of the inner tube with a rounded corner or a chamfered corner.

6. A female thread connector according to claim 1, characterized in that: The middle part of the connecting pipe is a bellows.

7. A female thread connector as claimed in claim 2, characterized in that: The elastic clamping bundle is an arc-shaped plate, and the elastic clamping bundle is equidistantly arranged around the circumference of the cover body.

8. The female thread connector according to claim 1, characterized in that: The cover cap is made by integral casting.

9. A female thread connector as claimed in claim 2, characterized in that: The side surface of the block facing inward is an arc-shaped surface.

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