A type of double-ended internal threaded rigid connection pipe

Abstract

This utility model discloses a double-ended internally threaded rigid connection pipe with a union joint, including a flat joint, a nut, and a transition joint; both the flat joint nut and the transition joint are open at both ends and hollow inside; each end of the flat joint is connected to a transition joint via a nut; the two transition joints are coaxially connected to the two pipe openings of the kitchen gas column after the leak point has been removed. The advantage is that it overcomes the shortcomings of existing joints for kitchen gas columns, facilitating rapid repair and installation when a leak occurs in the kitchen gas column.

Description

Technical Field

[0001] This utility model relates to the field of connecting pipe technology, and in particular to a double-ended internally threaded hard connecting pipe with a swivel joint. Background Technology

[0002] In urban residential buildings, the exposed part of the gas riser above the kitchen countertop is often corroded by substances such as water, oil, and salt, resulting in corrosive perforations near the countertop and causing gas leaks.

[0003] In existing technologies, unions and quick-connect sleeves are commonly used for emergency repairs of leaks. However, unions are often unsuitable for installation due to the large outer diameter of the nut, or because gas risers are often too close to the wall after kitchen renovations. Kitchen risers are typically quite rigid, and unions cannot be bent even slightly, making installation impossible. For non-removable kitchen risers, the union's ends are too close together to be threaded with an electric threading machine, preventing installation. Quick-connect sleeves use wedge-shaped sealing rings for outer circle sealing, but severe corrosion pitting on the surface of the kitchen riser can prevent a proper seal. Furthermore, rubber seals have a short lifespan and are prone to loosening and leaking due to thermal expansion and contraction. Utility Model Content

[0004] The purpose of this utility model is to provide a double-ended internal threaded hard connection pipe with a live joint, thereby solving the aforementioned problems existing in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A double-ended internally threaded rigid connection pipe with a union joint includes a flat joint, a nut, and a transition joint; both the flat joint nut and the transition joint are open at both ends and hollow inside; each end of the flat joint is connected to a transition joint via a nut; the two transition joints are coaxially connected to the two column pipe openings of the kitchen column after the leak point has been removed.

[0007] Preferably, both ends of the planar connector extend outward along its radial direction to form blocking steps, and one end of the nut extends inward along its radial direction to form a stop. The blocking steps of the planar connector extend coaxially into the nut through the end where the stop is located. The other end of the nut is coaxially connected to the transition connector. When the nut and the transition connector are connected in place, the stop is pressed against the side of the blocking steps away from the transition connector.

[0008] Preferably, the transition joint includes a large-diameter section and a small-diameter section arranged coaxially. The outer circumference of the small-diameter section is provided with an external thread. The small-diameter section extends coaxially into the end of the nut away from the planar joint. The inner circumference of the end of the nut away from the planar joint is provided with an internal thread. The external thread engages with the internal thread, so that the transition joint is coaxially connected with the nut.

[0009] Preferably, the inner circumference of the large-diameter section is provided with an internal thread, the outer circumference of the column opening is provided with an external thread, the large-diameter section is coaxially sleeved on the outer circumference of the column opening, and the internal thread and the external thread are correspondingly engaged, so that the transition joint is coaxially connected to the column opening.

[0010] Preferably, sealing gaskets coaxial with the two ends of the planar joint are provided between the two ends and the corresponding transition joints.

[0011] The beneficial effects of this utility model are: 1. The maximum outer diameter of the connecting pipe is smaller than that of the union joint, making installation convenient. 2. When the kitchen column has high rigidity, due to the double-ended union of the connecting pipe and the long end distance, the transition joints at both ends can be tightened, and then the middle flat joint can be inserted sideways before tightening the nut, without affecting the installation. 3. For kitchen columns that cannot be disassembled, a longer pipe section can be cut according to the length of the connecting pipe, making it convenient to use threading machines of various thicknesses. 4. The sealing gasket is made of polytetrafluoroethylene, which is resistant to aging and has good sealing performance. Attached Figure Description

[0012] Figure 1 This is a structural diagram of the connecting pipe in an embodiment of this utility model;

[0013] Figure 2 This is a schematic diagram illustrating the working principle of the connecting tube in an embodiment of this utility model.

[0014] In the diagram: 1. Transition joint; 2. Sealing gasket; 3. Nut; 4. Flat joint; 5. Blocking step; 6. Stop. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0016] like Figure 1 As shown, in this embodiment, a double-ended internal threaded rigid connection pipe with a union is provided, including a flat joint 4, a nut 3 and a transition joint 1; both ends of the flat joint 4 and the nut 3 and the transition joint 1 are open and hollow inside; each end of the flat joint 4 is connected to a transition joint 1 via a nut 3; the two transition joints 1 are coaxially connected to the two column pipe openings of the kitchen column after the leakage point has been cut off.

[0017] In this embodiment, the two ends of the planar connector 4 extend outward along its radial direction to form blocking steps 5, and one end of the nut 3 extends inward along its radial direction to form a stop head 6. The blocking steps 5 of the planar connector 4 extend coaxially into the nut 3 through the end where the stop head 6 is located. The other end of the nut 3 is coaxially connected to the transition connector 1. When the nut 3 and the transition connector 1 are connected in place, the stop head 6 is pressed against the side of the blocking steps 5 away from the transition connector 1.

[0018] The transition joint 1 includes a large-diameter section and a small-diameter section arranged coaxially. The outer circumference of the small-diameter section is provided with an external thread. The small-diameter section extends coaxially into the end of the nut 3 away from the planar joint 4. The inner circumference of the end of the nut 3 away from the planar joint 4 is provided with an internal thread. The external thread and the internal thread mesh, so that the transition joint 1 and the nut 3 are coaxially connected.

[0019] The inner circumference of the large-diameter section is provided with an internal thread, and the outer circumference of the column opening is provided with an external thread. The large-diameter section is coaxially sleeved on the outer circumference of the column opening, and the internal thread and the external thread mesh accordingly, so that the transition joint 1 is coaxially connected with the column opening.

[0020] The two ends of the planar joint 4 are provided with sealing gaskets 2 that are coaxial with the corresponding transition joints 1. The sealing gaskets 2 are made of polytetrafluoroethylene.

[0021] In this embodiment, the length of the planar connector 4 can be set according to actual needs, and can be either short or long, in order to better meet actual requirements. During use, sufficient Teflon tape can be wrapped around the connection between the column pipe opening and the transition connector 1, which will adjust the length without affecting the sealing between the two.

[0022] In this embodiment, as Figure 2As shown, the operating principle of the connecting pipe is as follows: When a leak occurs in the kitchen column requiring emergency repair, first use a cutting machine to cut off the leaking section of the pipe. The specific cutting length needs to be determined according to the length of the connecting pipe used for emergency repairs of the corresponding diameter. Extend from the leak point to both ends of the kitchen column. To facilitate operation under the countertop, multiple cuts can be made under the countertop, such as cutting 60% under the countertop and 40% above the countertop. During the cutting process, ensure the pipe opening is vertical, flat, and burr-free. Use a manual or electric threader to thread a qualified British standard tapered pipe thread (external thread) onto the outer circumference of the column pipe opening. Then apply a mixture of hemp fiber and sealant to the external thread on the column pipe opening. Next, fit the transition connector 1 onto the column pipe opening and tighten it. Move the sealing washer 2 and the flat connector 4 from the side until they are coaxial with the column pipe opening, ensuring minimal gap. Then, tighten the nut 3 on the flat connector 4, engaging the nut 3 with the transition connector 1 according to the specified torque or number of turns. Afterward, turn on the gas and conduct a leak test using detergent and water.

[0023] By adopting the above-disclosed technical solution of this utility model, the following beneficial effects are obtained:

[0024] This utility model provides a union-type double-ended internally threaded rigid connector pipe. The maximum outer diameter of the connector pipe is smaller than that of a union joint, making installation convenient. When the kitchen column has high rigidity, due to the double-ended union of the connector pipe and the long end distance, the transition joints at both ends can be tightened, and then the middle flat joint can be inserted sideways before tightening the nut, without affecting the installation. For kitchen columns that cannot be disassembled, a longer section of pipe can be cut according to the length of the connector pipe, making it convenient to use threading machines of various thicknesses. The sealing gasket is made of polytetrafluoroethylene, which is aging-resistant and has good sealing performance.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A double-ended internally threaded rigid connector pipe with a union joint, characterized in that: It includes a flat joint, a nut, and a transition joint; both the flat joint nut and the transition joint are open at both ends and hollow inside; each end of the flat joint is connected to a transition joint via a nut; the two transition joints are coaxially connected to the two column openings of the kitchen column after the leak point has been removed.

2. The double-ended internal threaded rigid connection pipe according to claim 1, characterized in that: Both ends of the planar connector extend outward along its radial direction to form blocking steps, and one end of the nut extends inward along its radial direction to form a stop. The blocking steps of the planar connector extend coaxially into the nut through the end where the stop is located. The other end of the nut is coaxially connected to the transition connector. When the nut and the transition connector are connected in place, the stop is pressed against the side of the blocking steps away from the transition connector.

3. The double-ended internal threaded rigid connection pipe according to claim 2, characterized in that: The transition joint includes a large-diameter section and a small-diameter section arranged coaxially. The outer circumference of the small-diameter section is provided with an external thread. The small-diameter section extends coaxially into the end of the nut away from the planar joint. The inner circumference of the end of the nut away from the planar joint is provided with an internal thread. The external thread and the internal thread mesh, so that the transition joint and the nut are coaxially connected.

4. The union-type double-ended internally threaded rigid connection pipe according to claim 3, characterized in that: The inner circumference of the large-diameter section is provided with an internal thread, and the outer circumference of the column opening is provided with an external thread. The large-diameter section is coaxially sleeved on the outer circumference of the column opening, and the internal thread and the external thread mesh with each other, so that the transition joint is coaxially connected with the column opening.

5. The union-type double-ended internally threaded rigid connection pipe according to any one of claims 1 to 4, characterized in that: The two ends of the planar joint are provided with sealing gaskets that are coaxial with the corresponding transition joints.

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