Stop valve with good closure stability

Abstract

The utility model relates to the technical field of stop valves, in particular to a stop valve with good closure stability, which comprises a valve body, a valve rod and a valve core, the valve core is fixedly connected to the bottom end of the valve rod, the valve core is in sealing contact with the inner wall of the valve body, two ends of the valve body are respectively and fixedly connected with a flange plate, the top of the valve body is fixedly connected with a mounting shell, and the mounting shell is fixedly connected with the valve rod. A sealing structure is arranged in the mounting shell and comprises a positioning column, one end of the positioning column is fixedly connected to the surface of the valve rod, a sliding hole is formed in the outer wall of the mounting shell, and the positioning column is matched with the sliding hole. The valve body is opened or closed in a pressing mode, more convenience and rapidness are achieved, the arranged positioning column enters the limiting groove, springback of the spring can be restrained, the limiting effect after pressing is achieved, the traditional valve rod installation mode of threaded connection is abandoned, the situation that the thread part of the inner valve rod enters the valve body is avoided, and the service life of the valve rod is prolonged. And the phenomenon that the thread part is corroded is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of globe valves, in particular to a globe valve with good throttling stability. Background Technique

[0002] The water distribution and collection device is a device for connecting the supply and return water of each heating pipe in the water system. It is divided into a water distribution device and a water collection device according to the inlet and return water. Therefore, it is called a water distribution and collection device or a water collection and distribution device, commonly known as a water distribution device; among them, the globe valve is an important part of the water distribution device, which is used to control the opening or closing of the flow path in the water distribution device system; the existing globe valve generally includes a valve body and a valve seat that cooperates with the valve body. The valve body and the valve seat are generally installed on the pipe walls on opposite sides of the water distribution device. The valve body includes a slidable valve stem and a valve flap sleeved on the valve stem. The opening of the valve seat is closed by the downward movement of the valve stem or the opening of the valve seat is opened by the upward movement of the valve stem to realize the opening or closing of the corresponding flow path of the water distribution device.

[0003] After retrieval, the Chinese patent publication number is CN214578864U, and the literature disclosed by this patent is as follows: A globe valve, including a valve pipe, the top of the valve pipe is inlaid and communicated with an upper valve shell, connecting flanges are welded at both ends of the valve pipe, a valve cover is bolted to the top of the upper valve shell, a valve wheel is inserted and installed at the top of the valve cover, a valve stem is inlaid at the bottom of the valve wheel, one end of the valve stem is located inside the valve pipe, a valve plug is bolted to the bottom of the valve stem, a valve seat is welded inside the valve pipe, and the valve plug is directly above the valve orifice of the valve seat. By means of the filter screen plate snap-fitted inside the liquid inlet cavity, the utility model facilitates filtering the liquid or gas discharged from the liquid inlet cavity to the liquid outlet cavity by using the filter screen plate, thereby avoiding impurities from entering the liquid outlet cavity and the valve seat along with the liquid or gas, causing blockage of the valve seat and affecting the situation where the valve plug seals the valve seat, improving the service life and sealing effect of the entire globe valve, and also being able to filter the liquid or gas, meeting the requirements of the globe valve for the quality of the discharged liquid and gas.

[0004] The traditional valve stem is generally installed inside the globe valve by means of threads. Due to the flow of media such as liquid, the threads will be blocked, resulting in the inability to continue cleaning the filter screen. At the same time, due to long-term corrosion by the media, the threads of the valve stem will rust and be corroded, affecting the service life. In view of this, we propose a globe valve with good throttling stability. Content of the Utility Model

[0005] In view of the deficiencies of the prior art, the present utility model provides a globe valve with good throttling stability, which solves the problem that the valve stem thread is corroded by the medium for a long time, resulting in rust and corrosion of the valve stem thread. To achieve the above objectives, the present utility model is realized through the following technical solutions: A globe valve with good throttling stability, comprising a valve body, a valve stem, and a valve core. The valve core is fixedly connected to the bottom end of the valve stem. The valve core is in sealed contact with the inner wall of the valve body. Flange plates are respectively fixedly connected to both ends of the valve body. An installation shell is fixedly connected to the top of the valve body. A sealing structure is arranged inside the installation shell. The sealing structure includes a positioning column. One end of the positioning column is fixedly connected to the surface of the valve stem. A sliding hole is formed in the outer wall of the installation shell. The positioning column is arranged in cooperation with the sliding hole. A connecting plate is fixedly sleeved on the surface of the valve stem. A spring is sleeved on the surface of the valve stem. The bottom end of the spring is fixedly connected to the top of a sealing plate. The bottom of the connecting plate contacts the top of the spring.

[0006] Preferably, a cleaning structure is arranged on the valve core. A filter screen is fixedly connected to the inner wall of the valve body. An extension rod is arranged on the valve core. The other end of the extension rod is fixedly connected to a scraping plate. The scraping plate is arranged in cooperation with the surface of the filter screen.

[0007] Preferably, a limiting groove is formed in the inner wall of the sliding hole. The positioning column abuts against the inner wall of the limiting groove. The arranged limiting groove can play a role in limiting the positioning column and prevent the positioning column from rebounding under the longitudinal elastic potential energy of the spring.

[0008] Preferably, a sealing ring is fixedly sleeved on the surface of the valve core. One end of the extension rod is fixedly connected to the outside of the sealing ring. By arranging the sealing ring, when the valve core blocks the internal liquid flow of the valve body downward, the arranged sealing ring plays a sealing role in the valve body.

[0009] Preferably, the length of the scraping plate is the same as the width of the filter screen. One side of the scraping plate is fixedly in contact with the surface of the filter screen. The arranged filter screen can play a role in filtering the internal liquid of the valve body. The arranged scraping plate can clean the impurities attached to the surface of the filter screen.

[0010] Preferably, a sealing plate is fixedly connected to the inner wall of the valve body. The valve stem is movably connected to the inner wall of the sealing plate. The arranged sealing plate can play a sealing role in the top of the valve body.

[0011] Preferably, the top end of the valve stem movably penetrates through the inner wall of the installation shell and is fixedly connected to a button. The arranged button facilitates the operator to open or close the valve body by pressing.

[0012] From the above technical solutions, it can be seen that a globe valve with good throttling stability provided by the embodiments of this specification has at least the following beneficial effects:

[0013] (1) The utility model opens or closes the valve body by pressing, which is more convenient and fast. By setting the positioning column to enter the limit groove, the rebound of the spring can be inhibited, playing a role in limiting after pressing. The traditional valve rod installation method of threaded connection is abandoned, avoiding the internal valve rod thread part from entering the valve body and preventing the phenomenon of corrosion of the thread part.

[0014] (2) The filter screen set in the utility model can filter impurities in the liquid. By setting the scraper to move up and down with the valve core, when opening or closing inside the valve body, the scraper moves up and down on the surface of the filter screen, which can scrape off the impurities attached to the surface of the filter screen, avoiding the blockage of the filter screen caused by excessive impurities attached to the surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the utility model and form a part of this application:

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a cross-sectional view of the sealing structure in the utility model;

[0018] Figure 3 It is an enlarged view of the structure of A in the utility model;

[0019] Figure 4 It is an enlarged view of the structure of B in the utility model.

[0020] In the figure: 1, valve body; 2, flange; 3, cleaning structure; 301, scraper; 302, extension rod; 4, sealing structure; 401, sliding hole; 402, limit groove; 403, positioning column; 404, connecting plate; 405, spring; 406, sealing plate; 5, button; 6, mounting shell; 7, valve core; 8, filter screen; 9, sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model. Embodiment 1

[0022] Please refer to Figures 1 - 3As shown in the figure, a globe valve with good interception stability includes a valve body 1, a valve stem 10, and a valve core 7. The valve core 7 is fixedly connected to the bottom end of the valve stem 10, and the valve core 7 is in sealing contact with the inner wall of the valve body 1. Flange 2 plates are fixedly connected to both ends of the valve body 1, and an installation shell 6 is fixedly connected to the top of the valve body 1. A sealing structure 4 is arranged inside the installation shell 6. The sealing structure 4 includes a positioning column 403. One end of the positioning column 403 is fixedly connected to the surface of the valve stem 10. A sliding hole 401 is formed in the outer wall of the installation shell 6. The positioning column 403 is arranged in cooperation with the sliding hole 401. A connecting plate 404 is fixedly sleeved on the surface of the valve stem 10. A spring 405 is sleeved on the surface of the valve stem 10. The bottom end of the spring 405 is fixedly connected to the top of a sealing plate 406. The bottom of the connecting plate 404 is in contact with the top of the spring 405. A limiting groove 402 is formed in the hole wall of the sliding hole 401. The positioning column 403 abuts against the groove wall of the limiting groove 402. The limiting groove 402 arranged can limit the positioning column 403 and prevent the positioning column 403 from rebounding under the longitudinal elastic potential energy of the spring 405. A sealing ring 9 is fixedly sleeved on the surface of the valve core 7. One end of an extension rod 302 is fixedly connected to the outside of the sealing ring 9. By arranging the sealing ring 9, when the valve core 7 blocks the internal liquid flow of the valve body 1 downward, the sealing ring 9 arranged can seal the inside of the valve body 1. A sealing plate 406 is fixedly connected to the inner wall of the valve body 1. The valve stem 10 is movably connected to the inner wall of the sealing plate 406. The sealing plate 406 arranged can seal the top of the valve body 1. The top end of the valve stem 10 movably penetrates the inner wall of the installation shell 6 and is fixedly connected to a button 5. By arranging the button 5, it is convenient for the operator to open or close the valve body 1 by pressing.

[0023] Furthermore, opening or closing the valve body 1 by pressing is more convenient and fast. By arranging the positioning column 403 to enter the limiting groove 402, the rebound of the spring 405 can be inhibited, playing a role of limiting after pressing. The traditional installation method of the threaded valve stem 10 is abandoned, avoiding the threaded part of the internal valve stem 10 from entering the valve body 1 and the phenomenon of corrosion of the threaded part. Embodiment 2

[0024] Please refer to Figures 3 - 4 As shown in the figure, a cleaning structure 3 is arranged on the valve core 7. A filter screen 8 is fixedly connected to the inner wall of the valve body 1. An extension rod 302 is arranged on the valve core 7. The other end of the extension rod 302 is fixedly connected to a scraper 301. The scraper 301 is arranged in cooperation with the surface of the filter screen 8. The length of the scraper 301 is the same as the width of the filter screen 8. One side of the scraper 301 is fixedly in contact with the surface of the filter screen 8. By arranging the filter screen 8, the liquid inside the valve body 1 can be filtered. By arranging the scraper 301, the impurities attached to the surface of the filter screen 8 can be cleaned.

[0025] Furthermore, the filter screen 8 provided can filter impurities in the liquid. The scraper 301 provided moves up and down with the valve core 10. When the valve core 10 opens or closes inside the valve body 1, the scraper 301 moves up and down on the surface of the filter screen 8, and can scrape off the impurities attached to the surface of the filter screen 8, preventing the filter screen 8 from being blocked due to excessive impurities attached to its surface.

[0026] When the stop valve with good throttling stability of the present utility model is in use, the valve body 1 is installed through the flanges 2 at both ends. Then, the button 5 is pressed, and the valve stem 10 rotates with the button 5. The valve stem 10 drives the positioning column 403 to rotate. The positioning column 403 disengages from the limiting groove 402 and enters the sliding hole 401. Subsequently, under the longitudinal elastic potential energy of the spring 405, the positioning column 403 is driven to slide upward in the sliding hole 401. At this time, the valve stem 10 drives the valve core 7 to move upward, and the valve core 7 is used to disengage from the valve seat to open the valve body 1, enabling the liquid inside the valve body 1 to flow. The filter screen 8 provided can filter impurities in the liquid, and the impurities adhere to one side of the filter screen 8 close to the valve core 7. During the upward movement of the valve core 7, the extension rod 302 and the scraper 301 move with the valve core 7. The upward movement of the scraper 301 on the filter screen 8 can scrape off the impurities attached to the surface of the filter screen 8, preventing the filter screen 8 from being blocked due to excessive impurities attached to its surface. Subsequently, when it is necessary to close the valve body 1, only the button 5 needs to be pressed. The button 5 drives the valve stem 10 and the valve core 7 to move downward, and the valve body 1 is closed by using the sealing ring 9 and the valve core 7. The sealing ring 9 provided can improve the sealing performance of the valve core 7. At this time, the positioning column 403 slides in the sliding hole 401. When the positioning column 403 slides to the bottom of the sliding hole 401, the button 5 is rotated again to make the positioning column 403 enter the limiting groove 402, which can inhibit the rebound of the spring 405 and play a role in limiting after pressing. The traditional installation method of the valve stem 10 with threaded connection is abandoned, preventing the threaded part of the internal valve stem 10 from entering the valve body 1 and avoiding the phenomenon of corrosion of the threaded part.

Claims

1. A stop valve with good flow-cutting stability, comprising a valve body (1), a valve stem (10), and a valve core (7), wherein the valve core (7) is fixedly connected to the bottom end of the valve stem (10), the valve core (7) is in sealing contact with the inner wall of the valve body (1), and flanges (2) are fixedly connected to both ends of the valve body (1), characterized in that: The top of the valve body (1) is fixedly connected to a mounting shell (6), a sealing structure (4) is arranged inside the mounting shell (6), the sealing structure (4) comprises a positioning column (403), one end of the positioning column (403) is fixedly connected to the surface of the valve stem (10), a sliding hole (401) is opened on the outer wall of the mounting shell (6), the positioning column (403) and the sliding hole (401) are arranged in cooperation, a connecting plate (404) is fixedly sleeved on the surface of the valve stem (10), a spring (405) is sleeved on the surface of the valve stem (10), the bottom end of the spring (405) is fixedly connected to the top of the sealing plate (406), and the bottom of the connecting plate (404) is in contact with the top of the spring (405).

2. A stop valve with good flow-cutting stability according to claim 1, characterized in that: The valve core (7) is provided with a cleaning structure (3), the inner wall of the valve body (1) is fixedly connected to a filter screen (8), the valve core (7) is provided with an extension rod (302), the other end of the extension rod (302) is fixedly connected to a scraper (301), and the scraper (301) is arranged in cooperation with the surface of the filter screen (8).

3. A stop valve with good flow-cutting stability according to claim 1, characterized in that: The wall of the sliding hole (401) is provided with a limiting groove (402), and the positioning column (403) abuts against the wall of the limiting groove (402).

4. A stop valve with good flow-cutting stability according to claim 2, characterized in that: A sealing ring (9) is fixedly sleeved on the surface of the valve core (7), and one end of the extension rod (302) is fixedly connected to the outside of the sealing ring (9).

5. A stop valve with good flow cut-off stability according to claim 2, characterized in that: The length of the scraper (301) is consistent with the width of the filter screen (8), and one side of the scraper (301) is fixedly in contact with the surface of the filter screen (8).

6. A stop valve with good flow-cutting stability according to claim 1, characterized in that: A sealing plate (406) is fixedly connected to the inner wall of the valve body (1), and the valve stem (10) is movably connected to the inner wall of the sealing plate (406).

7. A stop valve with good shutoff stability according to claim 1, characterized in that: The top end of the valve stem (10) movably penetrates the inner wall of the mounting shell (6) and is fixedly connected to a button (5).

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