Low-noise stop valve capable of being quickly opened and closed

Abstract

The utility model relates to the technical field of stop valves, in particular to a low-noise stop valve capable of being opened and closed quickly. A detachable protection pipe is mounted at the opening of the fixing ring, the bottom of the protection pipe is open, a threaded rod is rotationally mounted at the top of the protection pipe, and the threaded rod penetrates into the protection pipe; two liftable sliding blocks are installed in an inner cavity of the protection pipe in a sliding mode, two side plates are fixed between the two sliding blocks, and the bottom end of the threaded rod penetrates through the sliding block on the upper portion and is in threaded connection with the sliding block; through the arranged protection pipe, protection can be conducted on the exterior of the threaded rod, the situation that the threaded rod is corroded due to the fact that rainwater, humid air, corrosive gas and the like in the environment corrode the threaded rod can be avoided, and therefore the smoothness of the surface of the threaded rod is guaranteed, and the threaded rod is smoother during rotation; the situations of noise and difficulty in rotation caused by corrosion of the threaded rod are avoided, and the design is beneficial to quick opening and closing of the stop valve.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a fast-opening and closing low-noise stop valve. Background Art

[0002] The stop valve is a forced sealing valve that controls the flow of fluid by moving the valve core (also called valve disc) up and down, thereby adjusting the flow rate. Its opening and closing parts are plug-shaped valve discs, the sealing surface is flat or conical, and the valve disc moves linearly along the center line of the fluid. At present, stop valves are used in factories, water plants and other fields.

[0003] The utility model patent with the authorization announcement number CN219673481U discloses a new type of low-noise and weak-impact stop valve, which includes a valve body, a mounting tube is arranged on the top surface of the valve body, connecting tubes are arranged on both sides of the valve body, a connecting inner sleeve is arranged on the inner side of the connecting tube, a top connecting plate is arranged on the top surface of the mounting tube, a sealing collar is arranged at the center of the top surface of the top connecting plate, an operating rod is arranged on the inner side of the sealing collar, an operating wheel is arranged on the top surface of the operating rod, a sealing piston is arranged at the bottom end of the operating rod, a buffer sheet is arranged on the inner wall of the connecting inner sleeve, and a flange is arranged at one end of the mounting tube and the connecting tube away from the valve body. When the outer end of the connecting inner sleeve matches the flange of the connecting tube, when the valve body is connected to the pipeline, the connecting inner sleeve can play a buffering role between the flange and the pipeline, and when the valve body is impacted and vibrated, the vibration caused to the pipeline can be reduced, thereby avoiding the phenomenon of loosening between the pipeline and the valve body and causing large noise.

[0004] Although the new low-noise and low-impact stop valve has the effect of reducing noise and weakening impact, the device still has the following problems in actual use: the stop valve sealing piston is mainly adjusted by the rotation of the operating rod, and the operating rod is threadedly connected to the connecting ring. However, when the stop valve is in an outdoor environment for a long time and is continuously exposed to rain, humid air and corrosive gases, these harsh conditions will cause continuous erosion on the surface of the operating rod. Over time, this erosion will gradually intensify, causing rust on the surface of the operating rod. Rust not only weakens the mechanical strength of the operating rod, but also increases the friction coefficient of its surface, thereby generating harsh noise when turning the operating rod and reducing the smoothness of rotation. Therefore, this situation not only increases the difficulty and time-consuming of operation, but may also affect the efficiency and safety of the entire fluid control system due to untimely or inadequate opening and closing actions. In view of this, we propose a low-noise stop valve with fast opening and closing. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a low-noise stop valve with fast opening and closing.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A fast-opening and closing low-noise stop valve comprises a valve body, a top flange is arranged above the valve body, a sealing ring is installed at the top center of the top flange, a valve stem is passed through the sealing ring, a thread groove is arranged at the top of the valve stem, and two nuts are threadedly connected to the thread groove; a fixing ring is also coaxially fixed at the top center of the top flange;

[0008] A detachable protective tube is installed at the opening of the fixing ring, the bottom of the protective tube is open, and a threaded rod is rotatably installed on the top of the protective tube, and the threaded rod penetrates into the protective tube;

[0009] Two liftable sliders are slidably installed in the inner cavity of the protection tube, two side plates are fixed between the two sliders, the bottom end of the threaded rod passes through the upper slider and is threadedly connected to the slider, the valve stem passes through the lower slider, and the lower slider is clamped by two nuts.

[0010] Furthermore, a hand wheel is installed at the top end of the threaded rod, and the threaded rod is coaxially keyed to the hand wheel.

[0011] Furthermore, the outer wall of the fixing ring is threadedly connected with two fixing bolts, the outer wall of the protection tube is provided with two fixing holes, and the ends of the fixing bolts are plugged into the fixing holes.

[0012] Furthermore, the cross-sectional shape of the fixing ring is annular, and the opening size of the fixing ring is matched with the bottom end size of the protection tube.

[0013] Furthermore, the slider and the side plate are an integrally formed structure, and both the slider and the side plate are made of stainless steel.

[0014] Furthermore, the inner wall of the protection tube is provided with two guide grooves, and the outer wall of the side plate is provided with a guide rail slidably connected to the guide grooves.

[0015] Furthermore, an annular sealing ring is installed on the top of the protection tube, and the threaded rod passes through the sealing ring.

[0016] Furthermore, the outer wall of the protection tube is coated with a galvanized protective layer, and the protection tube is a product made of stainless steel.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] By setting up a protective tube, the outside of the threaded rod can be protected to prevent the threaded rod from being corroded by rain, humid air and corrosive gases in the environment and causing rust on the threaded rod, thereby ensuring the smoothness of the threaded rod surface and making the threaded rod rotate more smoothly, avoiding noise and difficulty in rotation due to rust on the threaded rod. This design is conducive to the rapid opening and closing of the stop valve. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 It is a schematic diagram of the overall explosion structure of the utility model;

[0021] Figure 3 It is a cross-sectional view of the overall structure of the utility model;

[0022] Figure 4 It is a schematic diagram of a part of the explosion structure in the utility model;

[0023] Figure 5 It is a structural schematic diagram of the protection tube in the utility model.

[0024] In the figure:

[0025] 1. Valve body; 10. Top flange; 11. Sealing ring; 12. Valve stem; 121. Nut; 13. Fixing ring; 131. Fixing bolt; 14. Protective tube; 141. Fixing hole; 142. Guide groove; 15. Handwheel; 16. Threaded rod; 17. Slider; 18. Side plate; 181. Guide rail. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] This embodiment provides a technical solution:

[0028] See also Figure 1-Figure 5As shown, a fast-opening and closing low-noise stop valve comprises a valve body 1, a top flange 10 is provided above the valve body 1, a sealing ring 11 is installed at the top center of the top flange 10, a valve stem 12 is passed through the sealing ring 11, a threaded groove is provided at the top of the valve stem 12, and two nuts 121 are threadedly connected to the threaded groove; a fixing ring 13 is also coaxially fixed at the top center of the top flange 10; a detachable protective tube 14 is installed at the opening of the fixing ring 13, the bottom of the protective tube 14 is open, a threaded rod 16 is rotatably installed at the top of the protective tube 14, and the threaded rod 16 penetrates into the protective tube 14; two liftable sliders 17 are slidably installed in the inner cavity of the protective tube 14, two side plates 18 are fixed between the two sliders 17, the bottom end of the threaded rod 16 passes through the upper slider 17 and is threadedly connected to the slider 17, the valve stem 12 passes through the lower slider 17, and the lower slider 17 is clamped by two nuts 121.

[0029] In this embodiment, a hand wheel 15 is installed at the top of the threaded rod 16, and the threaded rod 16 is coaxially keyed with the hand wheel 15. The hand wheel 15 is convenient for operating the threaded rod 16 to rotate, which has the advantage of convenient operation.

[0030] In this embodiment, the outer wall of the fixing ring 13 is threadedly connected with two fixing bolts 131, and the outer wall of the protection tube 14 is provided with two fixing holes 141, and the ends of the fixing bolts 131 are plugged into the fixing holes 141. The fixing bolts 131 connected by threads can provide a reliable fastening force, ensure that the connection between the fixing ring 13 and the protection tube 14 is firm and reliable, and have the advantage of easy disassembly and assembly.

[0031] In this embodiment, the cross-sectional shape of the fixing ring 13 is annular, and the opening size of the fixing ring 13 is matched with the bottom size of the protection tube 14. The annular design improves the strength and stability of the structure, and the matching size ensures the adaptability of the installation of the protection tube 14, while enhancing the sealing and stability of the connection, effectively preventing the intrusion of external impurities and the leakage of internal substances.

[0032] In this embodiment, the slider 17 and the side plate 18 are an integrally formed structure, and both the slider 17 and the side plate 18 are made of stainless steel. The integrally formed structure improves the overall structural strength and stability, and the stainless steel material has good corrosion resistance, wear resistance and high strength, and can be used for a long time in a harsh environment without being easily damaged, thereby ensuring the long-term reliable operation of the slider 17 and the side plate 18.

[0033] In this embodiment, the inner wall of the protection tube 14 is provided with two guide grooves 142, and the outer wall of the side plate 18 is provided with a guide rail 181 slidably connected to the guide groove 142. The cooperation between the guide groove 142 and the guide rail 181 provides guidance for the movement of the side plate 18, thereby ensuring the stability of the side plate 18.

[0034] In this embodiment, an annular sealing ring is installed on the top of the protection tube 14, and the threaded rod 16 passes through the sealing ring. The annular sealing ring can effectively prevent dust, moisture and other impurities from entering the protection tube 14, protecting the internal parts from pollution and damage.

[0035] In this embodiment, the outer wall of the protection tube 14 is coated with a galvanized protective layer, and the protection tube 14 is made of stainless steel. The stainless steel material itself has good corrosion resistance, and the galvanized protective layer further enhances the corrosion resistance of the protection tube 14, especially in harsh environments such as humidity and high salt, which can effectively extend the service life of the protection tube 14.

[0036] It should be added that the fixing ring 13 in this embodiment is fixedly connected to the top flange 10 by bolts. The bolt fixing method ensures the installation reliability of the fixing ring 13, thereby ensuring the stability of the fixing ring 13 and facilitating the disassembly and assembly of the fixing ring 13.

[0037] During specific use, the user first holds the handwheel 15 and turns it, and the handwheel 15 drives the threaded rod 16 to rotate. As the threaded rod 16 rotates, the slider 17 drives the side plate 18 to move in the vertical direction. At the same time, the slider 17 drives the valve stem 12 to move in the vertical direction. As the valve stem 12 rises and falls, the position of the valve core can be adjusted to realize the opening and closing of the stop valve.

[0038] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A fast-opening and closing low-noise stop valve comprises a valve body (1), a top flange (10) is arranged above the valve body (1), a sealing ring (11) is installed at the top center of the top flange (10), and a valve stem (12) is passed through the sealing ring (11), and is characterized in that: A thread groove is formed at the top of the valve stem (12), and two nuts (121) are threadedly connected to the thread groove; a fixing ring (13) is coaxially fixed at the center of the top of the top flange (10); A detachable protective tube (14) is installed at the opening of the fixing ring (13); the bottom of the protective tube (14) is open; a threaded rod (16) is rotatably installed at the top of the protective tube (14); and the threaded rod (16) penetrates into the protective tube (14); Two liftable sliders (17) are slidably installed in the inner cavity of the protection tube (14), two side plates (18) are fixed between the two sliders (17), the bottom end of the threaded rod (16) passes through the upper slider (17) and is threadedly connected to the slider (17), the valve stem (12) passes through the lower slider (17), and the lower slider (17) is clamped by two nuts (121).

2. The fast opening and closing low noise stop valve according to claim 1 is characterized in that: A hand wheel (15) is installed at the top end of the threaded rod (16), and the threaded rod (16) and the hand wheel (15) are coaxially key-connected.

3. The fast opening and closing low noise stop valve according to claim 1 is characterized in that: The outer wall of the fixing ring (13) is threadedly connected with two fixing bolts (131), the outer wall of the protection tube (14) is provided with two fixing holes (141), and the ends of the fixing bolts (131) are plugged into the fixing holes (141).

4. The fast opening and closing low noise stop valve according to claim 1 is characterized in that: The cross-sectional shape of the fixing ring (13) is annular, and the opening size of the fixing ring (13) is matched with the bottom end size of the protection tube (14).

5. The fast opening and closing low noise stop valve according to claim 1 is characterized in that: The slider (17) and the side plate (18) are an integrally formed structure, and both the slider (17) and the side plate (18) are made of stainless steel.

6. The fast opening and closing low noise stop valve according to claim 1 is characterized in that: The inner wall of the protection tube (14) is provided with two guide grooves (142), and the outer wall of the side plate (18) is provided with a guide rail (181) slidably connected to the guide grooves (142).

7. The fast opening and closing low noise stop valve according to claim 1 is characterized in that: An annular sealing ring is installed on the top of the protection tube (14), and the threaded rod (16) passes through the sealing ring.

8. The fast opening and closing low noise stop valve according to claim 1 is characterized in that: The outer wall of the protection tube (14) is coated with a galvanized protective layer, and the protection tube (14) is a product made of stainless steel.

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