Cross-linked pipe type self-sealing connecting ball valve

Abstract

The utility model provides a crosslinking pipe type self-sealing connecting ball valve, and belongs to the technical field of valve connection. The problem that water seepage and leakage risks exist after long-time use due to the fact that most connection modes between an existing ball valve and a pipeline are incomplete connection is solved. The cross-linked pipe type self-sealing connecting ball valve comprises a ball valve body, a QE pipe fitting connector is installed and connected to a port of the ball valve body, a thread sleeve installation step and a plurality of limiting grooves and limiting protrusions are sequentially formed on the QE pipe fitting connector in the circumferential direction from front to back, the QE pipe fitting connector and a PE-Xa pipe are installed in a matched mode, and a QE ring is arranged at the front end of the PE-Xa pipe in a sleeving mode from front to back. When the pipeline is installed, a special tool is used for conducting expansion flaring on the PE-Xa pipe and the QE ring firstly, then the QE pipe fitting connector is inserted into the flaring pipeline, and the PE-Xa pipe and the QE ring are shrunk and then tightly arranged on the QE pipe fitting connector in a sleeved mode after being shrunk. The self-sealing ball valve has the advantages of achieving self-sealing of valve connection, being convenient to install and high in sealing performance, and guaranteeing long-term smooth operation of the ball valve and a connecting pipeline thereof.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve connection, and relates to a ball valve, in particular to a cross-linked tube type self-sealing connection ball valve. Background Art

[0002] PEX cross-linked pipes are divided into PE-Xa, PE-Xb and PE-Xc according to the cross-linking method and degree of cross-linking. PE-Xa pipes are also called cross-linked polyethylene PE-Xa pipes. They are made of high-density polyethylene XL-1800 as the main material. Chemical covalent bonds are formed between polyethylene molecular chains through cross-linking, so that the molecules form a three-dimensional network structure, which has excellent high temperature resistance, pressure resistance and other physical and chemical properties. Quick Easy connection using PE-Xa pipes is a pipe connection method widely used in Europe and North America.

[0003] A ball valve is a valve in which the valve stem drives the opening and closing member (ball) and rotates around the axis of the ball valve. It is widely used in various water systems such as air conditioning, heating, and domestic water supply. It is used to regulate and control the confluence, diversion, and flow direction switching of fluid media between pipelines.

[0004] like Figure 1 As shown, a conventional ball valve generally includes a ball valve body 100, a threaded joint 110, and a joint screw sleeve 120 connecting the two, and the joint screw sleeve 120 is sleeved on the outside of the connection between the ball valve body 100 and the threaded joint 110. In the prior art, the connection methods used between the threaded joint 110 and the water system pipeline include threaded connection, PPR welding, and compression connection, but since these connection methods are all incomplete connections, the ball valve is prone to water seepage and leakage after long-term use, so it is necessary to design a connection ball valve that is easy to install and has strong sealing performance. Utility Model Content

[0005] The utility model aims to provide a cross-linked tube type self-sealing connecting ball valve in view of the above problems existing in the prior art.

[0006] The purpose of the utility model can be achieved by the following technical solutions: a cross-linked tubular self-sealing connection ball valve, comprising a ball valve body, wherein the two side ports of the ball valve body are respectively connected with threaded joints and QE pipe fittings through joint screw sleeves, wherein the QE pipe fitting is formed with a screw sleeve installation step at the connection with the joint screw sleeve, and the rear side of the screw sleeve installation step is circumferentially formed with a plurality of limiting grooves and limiting protrusions on the outer pipe wall of the QE pipe fitting;

[0007] The QE pipe fitting joint is installed in conjunction with the PE-Xa pipe, and the QE ring is sleeved on the front end of the PE-Xa pipe from front to back. When installing the pipeline, first use special tools to expand and flare the PE-Xa pipe and the QE ring, and then insert the QE pipe fitting joint into the expanded pipeline. After the PE-Xa pipe and the QE ring are retracted, they are tightly shrunk on the QE pipe fitting joint to achieve self-sealing of the pipeline.

[0008] In the above-mentioned cross-linked tubular self-sealing connecting ball valve, the rear side of the screw sleeve installation step is on the outer tube wall of the QE pipe fitting joint, and a primary limit groove, a primary limit protrusion, a secondary limit groove and a secondary limit protrusion are circumferentially formed in sequence from front to back, and the outer diameters of the primary limit protrusion and the secondary limit protrusion are both reduced inwardly from front to back.

[0009] In the above-mentioned cross-linked tubular self-sealing connecting ball valve, the QE ring is integrally formed with a limiting ring extending toward the center at the front end, and the limiting ring limits and fixes the QE ring when it is sleeved on the front end of the PE-Xa tube from front to back.

[0010] In the above-mentioned cross-linked tubular self-sealing connection ball valve, the connector types at the ports on both sides of the ball valve body can be replaced according to actual application requirements, including installing QE pipe connectors at both ends of the ball valve body.

[0011] Compared with the prior art, the utility model provides a cross-linked tubular self-sealing connection ball valve, which replaces the threaded joint with a QE pipe fitting joint and replaces traditional connection methods such as threaded connection with a cross-linked tubular connection, so that the ball valve can achieve self-sealing of the valve body port after connecting the pipeline. The installation is convenient and the sealing is strong, avoiding the risk of water leakage and seepage due to incomplete connection, and ensuring the long-term smooth operation of the ball valve and its connecting pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of the cross-linked tubular self-sealing connection ball valve;

[0013] Figure 2 This is a structural sectional view of the cross-linked tubular self-sealing connection ball valve;

[0014] Figure 3 yes Figure 2 A magnified view of the structure at the middle circle A;

[0015] Figure 4 It is a structural schematic diagram of the QE pipe fitting joint in the cross-linked tubular self-sealing connection ball valve.

[0016] In the above figure, 100, ball valve body; 110, threaded joint; 120, joint sleeve; 130, QE pipe fitting joint; 131, sleeve installation step; 132, primary limit groove; 133, primary limit protrusion; 134, secondary limit groove; 135, secondary limit protrusion; 210, PE-Xa pipe; 220, QE ring; 221, limit ring. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] like Figures 1 to 4 As shown, the cross-linked tubular self-sealing connection ball valve comprises a ball valve body 100, and the two side ports of the ball valve body 100 are connected with joints through joint screw sleeves 120, and the joints are connected to the water system pipeline. In the prior art, the connection between the joint and the pipeline is usually connected by threaded connection, PPR welding, clamping connection and other connection methods, which are incomplete connections and are prone to water seepage and leakage after long-term use.

[0019] Quick Easy connection is a pipe connection method widely used in Europe and North America. It mainly uses PE-Xa pipe 210 and QE pipe fittings to achieve close connection of various pipelines. Compared with other pipes, PE-Xa pipe 210 has better flexibility and smaller bending radius, and can maintain stable performance in harsh high and low temperature environments. It can not only prevent the cold brittleness of the pipe caused by the low temperature environment, but also its maximum operating temperature can reach 110℃. It has unique thermal memory performance, which can make the pipe recover quickly after being heated by hot air at high temperature when it is bent. The inner wall of PE-Xa pipe 210 is smooth, and it has better anti-scaling performance than metal pipes, which can ensure the long-term smooth operation of the pipeline.

[0020] The utility model applies the Quick Easy connection method to the connection between the ball valve and the pipeline. The connector types at the ports on both sides of the ball valve body 100 can be replaced according to actual application requirements, including: installing and connecting threaded connectors 110 and QE pipe connectors 130 at both ends of the ball valve body 100 through connector screw sleeves 120, and installing and connecting QE pipe connectors 130 at both ends of the ball valve body 100.

[0021] like Figures 2 to 4As shown, the QE pipe fitting joint 130 used on the ball valve is formed with a screw sleeve installation step 131 at the connection with the joint screw sleeve 120. When the QE pipe fitting joint 130 is installed, the joint screw sleeve 120 is sleeved from back to front on the outside of the port connection between the QE pipe fitting joint 130 and the ball valve body 100. The front end of the joint screw sleeve 120 is connected to the ball valve body 100 through a thread, and the rear end cooperates with the screw sleeve installation step 131 to fix the QE pipe fitting joint 130 at the port of the ball valve body 100.

[0022] On the outer tube wall of the QE pipe fitting 130, the rear side of the screw sleeve installation step 131 is formed with a primary limiting groove 132, a primary limiting protrusion 133, a secondary limiting groove 134 and a secondary limiting protrusion 135 in a circumferential direction from front to back, wherein the outer diameters of the primary limiting protrusion 133 and the secondary limiting protrusion 135 are slightly reduced inward from front to back, and the cross section is trapezoidal. The QE pipe fitting 130 is installed in coordination with the PE-Xa pipe 210, and a plurality of limiting grooves and limiting protrusions are arranged at intervals on the QE pipe fitting 130, so that the PE-Xa pipe 210 can be closely fitted with the uneven outer surface of the QE pipe fitting 130 after installation and retraction, so as to achieve the effect of complete connection and self-sealing, and the trapezoidal cross section with a large front and a small back can effectively prevent the PE-Xa pipe 210 from sliding backward and loosening after being sleeved on the QE pipe fitting 130, so as to ensure the tightness and stability of the connection.

[0023] The front end of the PE-Xa tube 210 is sleeved with a QE ring 220, and the QE ring 220 has an integrated limiting ring 221 extending toward the center at the front end. The limiting ring 221 limits and fixes the QE ring 220 when it is sleeved on the front end of the PE-Xa tube 210 from front to back.

[0024] The working principle of the utility model during installation is: first insert the QE ring 220 from front to back into the port of the PE-Xa tube 210, then use a special tool to expand and expand the combined PE-Xa tube 210 and the QE ring 220, and insert the QE pipe fitting 130 into the expanded PE-Xa tube 210. Due to the characteristics of the materials of the PE-Xa tube 210 and the QE ring 220 themselves, they can generate a strong contraction force when they shrink after expansion. After a few seconds, the PE-Xa tube 210 and the QE ring 220 can be tightly shrunk on the QE pipe fitting 130, and after 6 hours, the joint is as strong as the pipeline. The utility model realizes the self-sealing connection of the ball valve, is easy to install, has strong sealing, avoids the risk of water leakage and seepage caused by incomplete connection, and ensures the long-term smooth operation of the ball valve and its connecting pipeline.

[0025] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0026] Although various terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A cross-linked tubular self-sealing connection ball valve, comprising a ball valve body (100), characterized in that: The two side ports of the ball valve body (100) are respectively connected with threaded joints (110) and QE pipe fitting joints (130) through joint screw sleeves (120); the QE pipe fitting joint (130) is provided with a screw sleeve installation step (131) at the connection with the joint screw sleeve (120); and a plurality of limiting grooves and limiting protrusions are formed circumferentially on the outer pipe wall of the QE pipe fitting joint (130) at the rear side of the screw sleeve installation step (131); The QE pipe fitting joint (130) is installed in conjunction with the PE-Xa pipe (210), and the QE ring (220) is sleeved on the front end of the PE-Xa pipe (210) from front to back. When installing the pipeline, the PE-Xa pipe (210) and the QE ring (220) are first expanded and expanded using a special tool, and then the QE pipe fitting joint (130) is inserted into the expanded pipeline. After the PE-Xa pipe (210) and the QE ring (220) are retracted, they are tightly sleeved on the QE pipe fitting joint (130) to achieve pipeline self-sealing.

2. A cross-linked tubular self-sealing connecting ball valve according to claim 1, characterized in that: A primary limiting groove (132), a primary limiting protrusion (133), a secondary limiting groove (134) and a secondary limiting protrusion (135) are sequentially formed circumferentially from front to back on the outer tube wall of the QE pipe fitting joint (130) at the rear side of the screw sleeve installation step (131), and the outer diameters of the primary limiting protrusion (133) and the secondary limiting protrusion (135) are both reduced inwardly from front to back.

3. A cross-linked tubular self-sealing connecting ball valve according to claim 1, characterized in that: The QE ring (220) is integrally formed with a limiting ring (221) extending toward the center at the front end, and the limiting ring (221) limits and fixes the QE ring (220) when the QE ring (220) is sleeved on the front end of the PE-Xa tube (210) from front to back.

4. A cross-linked tubular self-sealing connecting ball valve according to claim 1, characterized in that: The connector types at the ports on both sides of the ball valve body (100) can be replaced according to actual application requirements, including installing QE pipe fitting connectors (130) at both ends of the ball valve body (100).

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