Stop valve with anti-seismic effect

Abstract

The stop valve comprises a valve body, a valve cover is connected to the top of the valve body, a valve rod is connected to the valve cover in a threaded mode, a hand wheel is connected to the top end of the valve rod, a valve clack is rotationally connected to the bottom end of the valve rod, and a containing bin located above a flow guide chamber is formed after the valve body and the valve cover are connected. By rotating the hand wheel, the hand wheel can drive the valve rod to rotate, the valve rod can move upwards along the valve cover under the threaded connection effect of the valve rod and the valve cover, the valve rod can drive the valve clack to move upwards and be contained in the inner side of the containing bin, and when the valve clack moves upwards, the valve clack can be closed conveniently. According to the stop valve, the opening and closing mechanism can be driven to close the storage bin, and therefore when the valve clack is opened, the valve clack can be effectively protected, vibration caused by medium impact is avoided, and the service life of the stop valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a stop valve with anti-seismic effect. Background Art

[0002] The globe valve, also called the stop valve, is one of the most widely used valves. It is popular because of the small friction between the sealing surfaces during opening and closing, the durability, the small opening height, the easy manufacturing and maintenance, and it is suitable not only for medium and low pressure, but also for high pressure. The closing principle of the globe valve is to rely on the valve stem pressure to make the valve disc sealing surface fit closely with the valve seat sealing surface to prevent the flow of the medium.

[0003] In the prior art, when the valve disc opens, the medium enters the valve body with large kinetic energy, and a strong impact force is generated during the flow process. The impact force will continuously impact the valve disc, causing it to vibrate continuously. In traditional stop valves, the valve disc and the valve stem are generally fixedly connected. The impact force on the valve disc will be transmitted to the valve stem. During long-term use, the valve stem is prone to deformation.

[0004] Therefore, a stop valve with anti-vibration effect is needed to solve the problems raised in the above background technology. Utility Model Content

[0005] In view of the above problems, the utility model provides a stop valve with anti-seismic effect.

[0006] The utility model provides the following technical solutions: a stop valve with anti-seismic effect, comprising a valve body, the valve body comprising a medium inlet and a medium outlet, a flow guide chamber is arranged between the medium inlet and the medium outlet, the bottom of the flow guide chamber is connected with the medium inlet, and a sealing gasket is installed, a valve cover is connected with the top of the valve body, a valve stem is passed through the inner side of the valve cover, and is threadedly connected with the valve stem, a hand wheel is connected with the top end of the valve stem, and a valve disc adapted to the sealing gasket is rotatably connected with the bottom end of the valve stem;

[0007] After the valve body is connected to the valve cover, a storage bin is formed above the guide chamber. An opening and closing mechanism is provided near the bottom of the storage bin to facilitate its closing. The opening and closing mechanism includes two groups of cover plates rotatably connected to the storage bin, one side of the two groups of cover plates are hinged with connecting plates, and both sides of the valve flap are hinged with hinged rods, and the other ends of the two groups of hinged rods are respectively slidably connected to the two groups of connecting plates.

[0008] In a further technical solution, both inner walls of the storage bin are provided with abutment plates.

[0009] In a further technical solution, when the valve flap is in an open state, the valve flap is stored inside the storage bin, and the two groups of cover plates are in a horizontal position and respectively contact the two groups of contact plates.

[0010] In a further technical solution, one end of the two groups of cover plates is correspondingly provided with a notch for convenient engagement.

[0011] In a further technical solution, the material of the two groups of cover plates is consistent with the material of the valve body.

[0012] The beneficial effects of the utility model are:

[0013] 1. The utility model can drive the valve stem to rotate by turning the hand wheel, and the valve stem can move upward along the valve cover under the action of the threaded connection with the valve cover, and the valve stem can drive the valve disc to move upward and be stored in the inner side of the storage bin, and when the valve disc moves upward, it can drive the two sets of hinged rods to move upward, and the other ends of the two sets of hinged rods can drive the two sets of connecting plates to move upward, and the other ends of the two sets of connecting plates can drive one end of the two sets of cover plates connected in rotation to rotate upward, so that the two sets of cover plates can complete the closing of the storage bin, and further, through the setting, when the valve disc is opened, the valve disc can be effectively protected to avoid the vibration caused by the impact of the medium, thereby improving the service life of the stop valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the valve flap opening structure of the utility model;

[0016] Figure 3 for Figure 2 Enlarged view of part A in .

[0017] In the figure: 1. valve body, 2. medium inlet, 3. medium outlet, 4. guide chamber, 5. valve cover, 6. storage bin, 7. valve stem, 8. hand wheel, 9. valve disc, 10. hinged rod, 11. connecting plate, 12. cover plate, 13. contact plate, 14. sealing gasket. DETAILED DESCRIPTION

[0018] The embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

[0019] Example:

[0020] Reference Figure 1-Figure 3A stop valve with anti-seismic effect, comprising a valve body 1, the valve body 1 comprising a medium inlet 2 and a medium outlet 3, a flow guide chamber 4 is arranged between the medium inlet 2 and the medium outlet 3, the bottom of the flow guide chamber 4 is connected with the medium inlet 2, and a sealing gasket 14 is installed, a valve cover 5 is connected to the top of the valve body 1, a valve stem 7 is passed through the inner side of the valve cover 5, and is threadedly connected to the valve stem 7, a hand wheel 8 is connected to the top of the valve stem 7, and a valve disc 9 adapted to the sealing gasket 14 is rotatably connected to the bottom end of the valve stem 7;

[0021] After the valve body 1 is connected to the valve cover 5, a storage bin 6 is formed above the guide chamber 4. An opening and closing mechanism is provided near the bottom of the storage bin 6 to facilitate its closing. The opening and closing mechanism includes two groups of cover plates 12 rotatably connected to the storage bin 6, and one side of the two groups of cover plates 12 is hinged with a connecting plate 11, and both sides of the valve disc 9 are hinged with hinged rods 10, and the other ends of the two groups of hinged rods 10 are slidably connected to the two groups of connecting plates 11 respectively.

[0022] Specifically, by rotating the handwheel 8, the handwheel 8 can drive the valve stem 7 to rotate, and the valve stem 7 can move upward along the valve cover 5 under the action of the threaded connection with the valve cover 5, and the valve stem 7 can drive the valve flap 9 to move upward and be stored in the inner side of the storage bin 6. When the valve flap 9 moves upward, it can drive the two groups of hinged rods 10 to move upward, and the other ends of the two groups of hinged rods 10 can drive the two groups of connecting plates 11 to move upward, and the other ends of the two groups of connecting plates 11 can drive one end of the two groups of cover plates 12 connected in rotation to rotate upward, so that the two groups of cover plates 12 can complete the closing of the storage bin 6, and then through the above structure, when the valve flap 9 is opened, the valve flap 9 can be effectively protected to avoid the vibration caused by the impact of the medium, thereby improving the service life of the stop valve.

[0023] Among them, the inner walls on both sides of the storage bin 6 are provided with resistance plates 13. When the valve flap 9 is in the open state, the valve flap 9 is stored on the inner side of the storage bin 6. The two groups of cover plates 12 are in a horizontal position and respectively resist the two groups of resistance plates 13. One end of the two groups of cover plates 12 is provided with corresponding notches for convenient engagement. The resistance plates 13 are set to limit the closing of the two groups of cover plates 12, and at the same time, the closing effect of the two groups of cover plates 12 can be better. The material of the two groups of cover plates 12 is consistent with the material of the valve body 1. The material of the cover plates 12 is consistent with that of the valve body 1, which can improve the performance and service life of the cover plates 12 themselves.

[0024] Working principle: First, by turning the handwheel 8, the handwheel 8 can drive the valve stem 7 to rotate. The valve stem 7 can move upward along the valve cover 5 through the threaded connection with the valve cover 5. The valve stem 7 can drive the valve disc 9 to move upward and be stored in the inner side of the storage bin 6. When the valve disc 9 moves upward, it can drive the two sets of hinged rods 10 to move upward. The other ends of the two sets of hinged rods 10 can drive the two sets of connecting plates 11 to move upward. The other ends of the two sets of connecting plates 11 can drive one end of the two sets of rotatably connected cover plates 12 to rotate upward, so that the two sets of cover plates 12 can complete the closing of the storage bin 6. When the valve disc 9 is opened, the valve disc 9 can be effectively protected to avoid the vibration caused by the impact of the medium, thereby completing the entire operation process.

[0025] The contents not described in detail in this specification belong to the prior art known to professionals in this field.

[0026] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A stop valve with anti-seismic effect, comprising a valve body, characterized in that: The valve body comprises a medium inlet and a medium outlet, a flow guide chamber is arranged between the medium inlet and the medium outlet, the bottom of the flow guide chamber is connected with the medium inlet and is installed with a sealing gasket, a valve cover is connected with the top of the valve body, a valve stem is passed through the inner side of the valve cover and is threadedly connected with the valve stem, a hand wheel is connected with the top end of the valve stem, and a valve disc adapted to the sealing gasket is rotatably connected with the bottom end of the valve stem; After the valve body is connected to the valve cover, a storage bin is formed above the guide chamber. An opening and closing mechanism is provided near the bottom of the storage bin to facilitate its closing. The opening and closing mechanism includes two groups of cover plates rotatably connected to the storage bin, one side of the two groups of cover plates are hinged with connecting plates, and both sides of the valve flap are hinged with hinged rods, and the other ends of the two groups of hinged rods are respectively slidably connected to the two groups of connecting plates.

2. A stop valve with anti-seismic effect according to claim 1, characterized in that: The inner walls on both sides of the storage bin are provided with abutment plates.

3. A stop valve with anti-seismic effect according to claim 2, characterized in that: When the valve flap is in an open state, the valve flap is stored inside the storage bin, and the two groups of cover plates are in a horizontal position and respectively contact the two groups of contact plates.

4. A stop valve with anti-seismic effect according to claim 3, characterized in that: One end of the two groups of cover plates is correspondingly provided with a notch for convenient locking.

5. A stop valve with anti-seismic effect according to claim 4, characterized in that: The material of the two sets of cover plates is consistent with the material of the valve body.

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