Internal thread gate valve with fastening connection

Abstract

The utility model relates to the technical field of internal thread gate valves, and discloses an internal thread gate valve with fastening connection, which comprises a valve body, two sides of the outer surface of the valve body are fixedly connected with a plurality of external support rods, and cavities are arranged in the external support rods. An automatic limiting function is achieved, in the pipeline installation process, external threads of a pipeline are screwed with internal threads of a valve body and gradually get close to an external supporting rod, along with approaching of the pipeline, a circular sliding groove in a positioning sleeve disc gradually gets close to a built-in limiting rod, and after the pipeline is installed to a certain degree, the built-in limiting rod can rotate in the circular sliding groove and contract under pressure; and at the moment, the pipeline continues to be installed, when the pipeline is installed in place, the built-in limiting rod can rotate to the position of the positioning hole, automatically pops up under the action of the telescopic spring, penetrates through the positioning hole, limits the pipeline and prevents the thread from loosening, and the stability and safety of pipeline connection are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of internal thread gate valves, in particular to an internal thread gate valve with a fastening connection. Background Art

[0002] An internal thread gate valve is a kind of valve, whose opening and closing part is a plug-shaped valve flap, the sealing surface is a plane or a conical surface, and the valve flap moves linearly along the center line of the fluid. The valve body of the internal thread gate valve is provided with internal threads and is usually connected to an external thread pipeline or an instrument measuring pipeline.

[0003] However, there are some deficiencies in the way of thread connection of valves in practical applications. Since the thread connection between the pipeline and the valve body may become loose due to factors such as vibration and pressure change, which will affect the firmness and tightness of the connection. Especially in working conditions of high temperature, high pressure or frequent vibration, this loosening phenomenon is more obvious, which may lead to medium leakage and pose a safety hazard. In addition, the tightening degree of the thread connection usually depends on the experience and strength of manual operation, it is difficult to ensure that the ideal effect can be achieved every time during installation, and improper operation may also cause thread damage, further reducing the reliability of the connection. Content of the Utility Model

[0004] To solve the above technical problems, the utility model provides an internal thread gate valve with a fastening connection.

[0005] The utility model is realized by adopting the following technical solutions: An internal thread gate valve with a fastening connection, including a valve body, both sides of the outer surface of the valve body are fixedly connected with several external support rods, a cavity is opened inside the external support rods, a telescopic spring is fixedly connected to the inner wall of the cavity, and an internal limiting rod is fixedly connected to the surface of the telescopic spring.

[0006] Through the above technical solutions, by designing the combined structure of the external support rod and the internal limiting rod, the internal limiting rod can be automatically ejected under the action of the elastic potential energy of the telescopic spring, so as to limit the threaded pipeline connection. This design not only enhances the fastening of the connection, but also effectively prevents the pipeline from loosening due to vibration or pressure change.

[0007] As a further improvement of the above solution, threads are engraved on the inner wall of the valve body, and an installation pipeline is threadedly connected inside the valve body.

[0008] Through the above technical solutions, the threaded connection allows for the quick installation and disassembly between the installation pipeline and the valve body, which is convenient for maintenance and replacement.

[0009] As a further improvement of the above solution, a positioning sleeve disc is fixedly connected to the outer surface of the installation pipeline, and a circular sliding groove is opened inside the positioning sleeve disc.

[0010] As a further improvement of the above solution, the built-in limit rod is slidably connected to the inside of the circular chute, and several positioning holes are formed in the inner wall of the circular chute.

[0011] Through the above technical solution, the built-in limit rod rotates inside the circular chute and automatically pops out at the position of the positioning hole to limit the pipeline, ensuring that the pipeline is installed in place.

[0012] As a further improvement of the above solution, the positioning holes are adapted to the built-in limit rod.

[0013] Through the above technical solution, the built-in limit rod penetrates through the positioning holes, which can effectively prevent the loosening of the threads caused by vibration or pressure changes and avoid the loosening and displacement of the pipeline.

[0014] As a further improvement of the above solution, an operating handwheel is provided above the valve body, and a threaded valve rod is fixedly connected to the lower surface of the operating handwheel.

[0015] As a further improvement of the above solution, the threaded valve rod is arranged inside the valve body, and a valve flap is fixedly connected to the bottom end of the threaded valve rod.

[0016] Through the above technical solution, the threaded valve rod can achieve precise lifting control by rotation, thereby accurately adjusting the opening degree of the valve flap and controlling the flow rate and pressure of the fluid.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] By setting the combined structure of the built-in limit rod and the circular chute, the present utility model realizes the automatic limiting function. During the pipeline installation process, the external thread of the pipeline is screwed with the internal thread of the valve body and gradually approaches the external support rod. As the pipeline approaches, the circular chute on the positioning sleeve disc gradually approaches the built-in limit rod. After the pipeline is installed to a certain extent, the built-in limit rod will rotate and be compressed and contracted inside the circular chute. At this time, the pipeline continues to be installed. When the installation is in place, the built-in limit rod will rotate to the position of the positioning hole and automatically pop out under the action of the telescopic spring, penetrate through the positioning hole, limit the pipeline, and prevent the loosening of the threads, improving the stability and safety of the pipeline connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the positioning sleeve disc of the present utility model;

[0021] Figure 3 It is a schematic diagram of the structure of the circular chute of the present utility model;

[0022] Figure 4Explosion structure schematic diagram of the telescopic spring of the present utility model;

[0023] Figure 5 Structure schematic diagram of the valve flap of the present utility model.

[0024] Main symbol description:

[0025] 1. Valve body; 2. External support rod; 3. Telescopic spring; 4. Built-in limit rod; 5. Installation pipeline; 6. Positioning sleeve disc; 7. Circular chute; 8. Positioning hole; 9. Operating handwheel; 10. Threaded valve rod; 11. Valve flap. Specific implementation manner

[0026] Next, in combination with the accompanying drawings and specific implementation manners, the present utility model will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0027] Embodiment:

[0028] Please combine Figures 1-5 , An internal threaded gate valve with a fastening connection in this embodiment includes a valve body 1. On both sides of the outer surface of the valve body 1, several external support rods 2 are fixedly connected. A cavity is opened inside the external support rod 2, and a telescopic spring 3 is fixedly connected to the inner wall of the cavity. An internal limit rod 4 is fixedly connected to the surface of the telescopic spring 3. When the valve body 1 is threadedly connected to the pipeline, the external thread of the pipeline is screwed with the internal thread of the valve body 1 and gradually approaches the external support rod 2. As the pipeline approaches, the internal limit rod 4 will eventually automatically pop out under the action of the elastic potential energy of the telescopic spring 3 and clamp the outer surface of the pipeline, forming an additional limit structure to strengthen the fastening effect of the threaded connection.

[0029] Internal threads are engraved on the inner wall of the valve body 1, and an installation pipeline 5 is threadedly connected inside the valve body 1. Align the external thread of the installation pipeline 5 with the internal thread on the inner wall of the valve body 1, and then rotate the pipeline so that the internal and external threads are gradually screwed together. Continue to rotate the installation pipeline 5 until the pipeline is completely screwed into the valve body 1 to reach the predetermined fastening position.

[0030] A positioning sleeve disc 6 is fixedly connected to the outer surface of the installation pipeline 5, and a circular chute 7 is opened inside the positioning sleeve disc 6.

[0031] The built-in limit rod 4 is slidably connected to the inside of the circular chute 7. A plurality of positioning holes 8 are formed in the inner wall of the circular chute 7. When the pipeline gradually approaches the valve body 1 through threaded connection, the circular chute 7 gradually approaches the built-in limit rod 4. As the pipeline continues to be installed, the built-in limit rod 4 will rotate inside the circular chute 7 and contract through the telescopic spring 3 under the pressure of the circular chute 7. At this time, there is still a certain distance between the built-in limit rod 4 and the positioning hole 8. When the pipeline continues to be installed to a certain extent, the built-in limit rod 4 rotates to the position of the positioning hole 8. At this time, the built-in limit rod 4 automatically pops out under the action of the telescopic spring 3, penetrates the positioning hole 8, and limits the pipeline to ensure that the pipeline is installed in place.

[0032] The positioning hole 8 is adapted to the built-in limit rod 4. The built-in limit rod 4 penetrates the positioning hole 8, which can effectively prevent the thread from loosening, avoid the pipeline from loosening and shifting, and improve the stability and safety of the connection.

[0033] An operating handwheel 9 is arranged above the valve body 1, and a threaded valve rod 10 is fixedly connected to the lower surface of the operating handwheel 9.

[0034] The threaded valve rod 10 is arranged inside the valve body 1. The bottom end of the threaded valve rod 10 is fixedly connected with a valve flap 11. The rotation of the threaded valve rod 10 drives the valve flap 11 fixedly connected thereto to perform a lifting motion, thereby realizing the opening and closing of the valve.

[0035] The implementation principle of an internal thread gate valve with a fastening connection in the embodiment of the present application is as follows: During the installation process, the staff first aligns the internal thread of the valve body 1 with the external thread of the installation pipeline 5, and then starts to rotate the pipeline so that the internal and external threads are gradually screwed together. As the pipeline continues to be installed, the circular chute 7 on the positioning sleeve plate 6 gradually approaches the built-in limit rod 4. When the built-in limit rod 4 enters the inside of the circular chute 7, it will rotate inside the circular chute 7 and contract through the telescopic spring 3 under the pressure of the inner wall of the circular chute 7. At this time, there is still a certain distance between the built-in limit rod 4 and the positioning hole 8. As the pipeline continues to be installed to a certain extent, the rotation angle of the built-in limit rod 4 in the circular chute 7 reaches the position of the positioning hole 8. At this time, the built-in limit rod 4 automatically pops out under the elastic force of the telescopic spring 3, penetrates the positioning hole 8, and limits the pipeline, thereby ensuring that the pipeline is installed in place. This automatic limiting function effectively prevents the thread from loosening, avoids the pipeline from loosening and shifting, and improves the stability and safety of the connection. After the pipeline installation is completed, the staff can rotate the threaded valve rod 10 through the operating handwheel 9 to make it perform a lifting motion inside the valve body 1. The rotation of the threaded valve rod 10 will drive the valve flap 11 fixedly connected thereto to perform a lifting motion, thereby realizing the opening and closing of the valve. This design makes the operation of the valve more convenient, and at the same time improves the reliability and service life of the valve.

[0036] The above embodiments are only the preferred embodiments of the present utility model, and the scope of protection of the present utility model cannot be limited thereby. Any non-substantial changes and substitutions made by those skilled in the art based on the present utility model fall within the scope of protection required by the present utility model.

Claims

1. An internal thread gate valve with a fastening connection, characterized in that, It includes a valve body (1). On both sides of the outer surface of the valve body (1), several external support rods (2) are fixedly connected. A cavity is formed inside the external support rod (2), and a telescopic spring (3) is fixedly connected to the inner wall of the cavity. An internal limiting rod (4) is fixedly connected to the surface of the telescopic spring (3).

2. The inside screw stop valve with a fastening connection as described in claim 1, characterized in that: Threads are engraved on the inner wall of the valve body (1), and an installation pipe (5) is threadedly connected inside the valve body (1).

3. The inside screw stop valve with fastening connection as claimed in claim 2, wherein: A positioning sleeve disc (6) is fixedly connected to the outer surface of the installation pipe (5), and a circular sliding groove (7) is formed inside the positioning sleeve disc (6).

4. The inside screw stop valve with firm connection according to claim 1, characterized in that: The internal limiting rod (4) is slidably connected inside the circular sliding groove (7), and several positioning holes (8) are formed on the inner wall of the circular sliding groove (7).

5. The inside screw stop valve with a fastening connection according to claim 4, characterized in that: The positioning hole (8) is adapted to the internal limiting rod (4).

6. The inside screw stop valve with a fastening connection as claimed in claim 1, characterized in that: An operating handwheel (9) is arranged above the valve body (1), and a threaded valve rod (10) is fixedly connected to the lower surface of the operating handwheel (9).

7. The internal screw gate valve with a fastening connection according to claim 6, characterized in that: The threaded valve rod (10) is arranged inside the valve body (1), and a valve flap (11) is fixedly connected to the bottom end of the threaded valve rod (10).

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