Durable stop valve

Abstract

The utility model discloses a durable stop valve, which belongs to the technical field of valves and comprises a valve body and a valve cover. A separation section is installed in the valve body, and a valve port is formed in the separation section in a penetrating mode. A valve rod capable of moving up and down is mounted on the valve cover through threads; an airtight valve clack is detachably installed at the bottom end of the valve rod and can directly penetrate into the valve port, and the diameter of the airtight valve clack is smaller than that of the valve port. A core seat is connected to the upper portion of the airtight valve clack and can abut against the upper portion of the valve port, and the diameter of the core seat is larger than that of the valve port. An inflatable sealing air ring is installed on the side face of the airtight valve clack, and when the sealing air ring is in an expansion state, a gap between the airtight valve clack and the valve port can be filled with the sealing air ring in a sealed mode. The airtight valve clack of the durable stop valve is in indirect contact with the valve port through the sealing air ring, abrasion caused by frequent friction between the airtight valve clack and the valve port is effectively avoided, the overall service life is greatly prolonged, and the later replacement cost of the durable stop valve is lower.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically a durable gate valve. Background Technology

[0002] A gate valve is a closed-loop valve that completely connects or disconnects a pipeline. A gate valve mainly consists of a valve body, valve disc, valve stem, and valve cover. The valve body is generally cast or forged and has internal channels for fluid flow. The valve disc is disc-shaped and moves up and down along the valve stem, tightly engaging with a sealing seat to achieve the closing and opening functions. The valve stem connects to the valve disc and extends to the outside of the valve body, used to operate the movement of the valve disc.

[0003] In existing gate valves, the valve stem directly drives a standard valve disc 6 to seal the valve port, such as... Figure 1 As shown, due to the frequent contact between the ordinary valve disc 6 and the valve port 4, the ordinary valve disc 6 will wear out every once in a while, resulting in a high frequency of valve disc replacement. This not only shortens the service life of the shut-off valve, but also increases the maintenance cost in the later stage. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a durable shut-off valve. The airtight valve disc of this durable shut-off valve indirectly contacts the valve port through a sealing ring, which effectively avoids wear caused by frequent friction between the airtight valve disc and the valve port, greatly improves the overall service life, and reduces the replacement cost in the later stage.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is implemented as follows:

[0006] A durable shut-off valve includes a valve body and a detachable valve cover mounted on top of the valve body;

[0007] The valve body has a partition section that divides its internal chamber into equal parts, and a valve port is opened through the partition section; a valve stem that moves up and down is installed on the valve cover by threads.

[0008] A detachable airtight valve disc is installed at the bottom of the valve stem. The airtight valve disc can pass directly into the valve port and the diameter of the airtight valve disc is smaller than the diameter of the valve port. A core seat is connected above the airtight valve disc. The core seat can abut against the top of the valve port and the diameter of the core seat is larger than the diameter of the valve port.

[0009] An inflatable sealing ring is installed on the side of the airtight valve disc. When the sealing ring is inflated, it can seal and fill the gap between the airtight valve disc and the valve port.

[0010] By adopting the above solution, the airtight valve disc of this durable gate valve indirectly contacts the valve port through a sealing ring, which effectively avoids wear caused by frequent friction between the airtight valve disc and the valve port, greatly improves the overall service life, and reduces the replacement cost in the later stage.

[0011] In a preferred embodiment of a durable shut-off valve, an air nozzle is provided above the airtight valve disc, and the air nozzle is connected to the sealing ring through an air hole opened inside the airtight valve disc;

[0012] There are at least eight vents, and all vents are arranged in a circumferential array with the vent as the center.

[0013] By adopting the above scheme, in order to achieve uniform inflation into the sealing ring, the gas from the air nozzle enters the sealing ring evenly through the air hole, thereby adjusting the expansion state of the sealing ring and flexibly adjusting the sealing performance between the airtight valve disc and the valve port.

[0014] As a preferred embodiment of a durable shut-off valve, a hollow air pressure chamber is provided on the stem of the valve stem; a pressure regulating screw is threadedly installed on the top of the air pressure chamber, and the bottom of the air pressure chamber is threadedly connected to the air nozzle for sealing.

[0015] The length of the pressure regulating screw is 1 / 2 to 2 / 3 of the length of the pressure chamber, and the pressure chamber is in a non-vacuum state with gas inside; the gas inside the pressure chamber is an inert gas.

[0016] Using the above method, in order to inflate the sealing ring, the pressure regulating screw is rotated to move it downwards, which will push the gas in the pressure chamber to continuously enter the sealing ring, thereby adjusting the expansion state of the sealing ring. If the gas is an inert gas such as nitrogen, its stability in the pressure chamber will be improved, and the corrosion inside the pressure regulating screw can also be effectively reduced.

[0017] In a preferred embodiment of a durable shut-off valve, a rotating handle located outside the air pressure chamber is fixed to the top of the pressure regulating screw.

[0018] By adopting the above solution, a rotating handle is installed to make it easier to rotate the adjusting screw, which will make it easier to rotate the pressure adjusting screw.

[0019] In a preferred embodiment of a durable shut-off valve, an annular clearance groove is provided on the side of the airtight valve disc, and the sealing ring is fixed in the clearance groove by adhesive bonding.

[0020] By adopting the above solution, in order to improve the durability of the sealing ring, the bonding joint between the sealing ring and the airtight valve disc is hidden in the relief groove. This reduces the impact force of water on the sealing ring, thereby extending the service life of the sealing ring.

[0021] After adopting the above technical solution, the beneficial effects of this utility model are:

[0022] 1. The airtight valve disc of this durable shut-off valve indirectly contacts the valve port through a sealing ring, which effectively avoids wear caused by frequent friction between the airtight valve disc and the valve port, greatly improving the overall service life and reducing the replacement cost in the later stage.

[0023] 2. In order to achieve uniform inflation into the sealing ring, the gas from the air nozzle enters the sealing ring evenly through the air hole, thereby adjusting the expansion state of the sealing ring and thus flexibly adjusting the sealing performance between the airtight valve disc and the valve port.

[0024] 3. In order to inflate the sealing ring, the pressure regulating screw is rotated to move it downward, which will push the gas in the pressure chamber into the sealing ring continuously, thereby adjusting the expansion state of the sealing ring; if the gas is an inert gas such as nitrogen, its stability in the pressure chamber is improved, and it can also effectively reduce the corrosion inside the pressure regulating screw.

[0025] 4. To facilitate the rotation of the adjusting screw, a rotating handle is installed, which makes it easier to rotate the pressure adjusting screw;

[0026] 5. To improve the durability of the sealing ring, the bonding area between the sealing ring and the airtight valve disc is hidden in the relief groove. This reduces the impact force of water on the sealing ring, thereby extending its service life. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a three-dimensional structural diagram of the internal structure of a shut-off valve in the background art;

[0029] Figure 2 This is a three-dimensional structural diagram of the internal structure of this utility model;

[0030] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0031] Figure 4 for Figure 2 A magnified view of a section at point B in the middle;

[0032] Figure 5 for Figure 3 Three-dimensional structural diagram of the gas-tight valve disc;

[0033] The markings in the diagram are: 1-valve body; 2-valve cover; 3-separation section; 4-valve port; 5-valve stem; 6-ordinary valve disc; 7-airtight valve disc; 8-core seat; 9-sealing ring; 10-air nozzle; 11-air hole; 12-air pressure chamber; 13-pressure regulating screw; 14-rotation handle; 15-avoiding groove. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] like Figures 2 to 4 As shown, a durable gate valve includes a valve body 1 and a valve cover 2 that is bolted to the top of the valve body 1. The valve body 1 has an internal partition 3 that divides its internal chamber into equal sections, with a valve port 4 extending through the partition 3. A valve stem 5 that moves vertically is threaded onto the valve cover 2. A gas-tight valve disc 7 is threaded to the bottom of the valve stem 5, allowing it to pass directly into the valve port 4, and the diameter of the gas-tight valve disc 7 is smaller than the diameter of the valve port 4. A core seat 8 is connected above the gas-tight valve disc 7, abutting against the top of the valve port 4, and the diameter of the core seat 8 is larger than the diameter of the valve port 4. An inflatable sealing ring 9 is installed on the side of the gas-tight valve disc 7, which, when inflated, seals and fills the gap between the gas-tight valve disc 7 and the valve port 4. The airtight valve disc 7 of this durable shut-off valve indirectly contacts the valve port 4 through the sealing ring 9, which effectively avoids wear caused by frequent friction between the airtight valve disc 7 and the valve port 4, greatly improving the overall service life and reducing the replacement cost in the later stage.

[0036] like Figure 3 As shown, an air nozzle 10 is provided above the airtight valve disc 7. The air nozzle 10 is connected to the sealing ring 9 through air holes 11 formed inside the airtight valve disc 7. There are at least eight air holes 11, and all air holes 11 are arranged in a circumferential array with the location of the air nozzle 10 as the center. In order to achieve uniform inflation into the sealing ring 9, the gas from the air nozzle 10 enters the sealing ring 9 evenly through the air holes 11, thereby adjusting the expansion state of the sealing ring 9 and thus flexibly adjusting the sealing performance between the airtight valve disc 7 and the valve port 4.

[0037] like Figure 4As shown, a hollow pressure chamber 12 is formed on the stem of the valve stem 5. A pressure regulating screw 13 is threaded onto the top of the pressure chamber 12, and the bottom of the pressure chamber 12 is threaded into the air nozzle 10 for sealing connection. The length of the pressure regulating screw 13 is 1 / 2 to 2 / 3 of the length of the pressure chamber 12, and the pressure chamber 12 is in a non-vacuum state containing gas. The gas in the pressure chamber 12 is an inert gas, such as nitrogen. To charge the sealing ring 9, rotating the pressure regulating screw 13 downwards pushes the gas in the pressure chamber 12 into the sealing ring 9, thereby adjusting the expansion state of the sealing ring 9. If the gas is an inert gas such as nitrogen, its stability within the pressure chamber 12 is improved, and corrosion inside the pressure regulating screw 13 can be effectively reduced.

[0038] like Figure 4 As shown, a rotating handle 14 located outside the air pressure chamber 12 is fixed to the top of the pressure regulating screw 13. The rotating handle 14 is installed to make it easier to rotate the pressure regulating screw 13.

[0039] like Figure 5 As shown, an annular clearance groove 15 is provided on the side of the airtight valve disc 7, and the sealing ring 9 is fixed in the clearance groove 15 by adhesive bonding. In order to improve the durability of the sealing ring 9, the bonding joint between the sealing ring 9 and the airtight valve disc 7 is hidden in the clearance groove 15. In this way, the impact force of water on the sealing ring 9 will be reduced, thereby extending the service life of the sealing ring 9.

[0040] The working principle of this utility model:

[0041] Before application, adjust the expansion state of the sealing ring 9. Move the airtight valve disc 7 into the valve port 4 by rotating the valve stem 5. Then, rotate the pressure adjusting screw 13 by turning the handle 14. After the pressure adjusting screw 13 is pressed down, it will push the gas in the air pressure chamber 12 into the sealing ring 9, thereby adjusting the expansion state of the sealing ring 9 until the pressure adjusting screw 13 can no longer move down. At this time, the gap between the airtight valve disc 7 and the valve port 4 is sealed and filled.

[0042] In application, directly rotating the valve stem 5 can drive the airtight valve disc 7 to open / close the valve port 4. Since the airtight valve disc 7 indirectly contacts the valve port 4 through the sealing ring 9, it effectively avoids wear caused by frequent friction between the airtight valve disc 7 and the valve port 4, greatly improving the overall service life and reducing the later replacement cost.

[0043] If the airtightness of the sealing ring 9 is found to be poor during later use, the original airtightness of the sealing ring 9 can be restored by adjusting the pressure regulating screw 13 to further inject air into the sealing ring 9.

[0044] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A durable type of stop valve, comprising a valve body (1) and a valve cover (2) detachably mounted on the top of the valve body (1); A partition section (3) is mounted inside the valve body (1) to divide the internal chamber thereof into two equal parts, and a valve port (4) is formed through the partition section (3); a valve stem (5) is threadedly mounted on the valve cover (2) to move up and down; characterized in that A gas-tight valve disc (7) is detachably mounted on the bottom end of the valve stem (5), which can pass through the valve port (4) and has a smaller diameter than the valve port (4); a core seat (8) is connected above the gas-tight valve disc (7), which can abut against the upper part of the valve port (4) and has a larger diameter than the valve port (4); A seal air ring (9) is mounted on the side of the gas-tight valve disc (7), which can seal and fill the gap between the gas-tight valve disc (7) and the valve port (4) when inflated.

2. The durable stop valve of claim 1, wherein: An air nozzle (10) is provided above the gas-tight valve disc (7), which is in communication with the seal air ring (9) through air holes (11) formed inside the gas-tight valve disc (7).

3. The durable stop valve of claim 2, wherein: There are at least eight air holes (11), which are arranged in a circumferential array with the air nozzle (10) as the center.

4. The durable stop valve of claim 3, wherein: A hollow air pressure chamber (12) is formed in the stem of the valve stem (5); a pressure regulating screw (13) is threadedly mounted on the top of the air pressure chamber (12), and the bottom of the air pressure chamber (12) is threadedly sealed to the air nozzle (10).

5. The durable stop valve of claim 4, wherein: The length of the pressure regulating screw (13) is 1 / 2-2 / 3 of the length of the air pressure chamber (12), and the air pressure chamber (12) is in a non-vacuum state with gas.

6. The durable stop valve of claim 5, wherein: The gas in the air pressure chamber (12) is inert gas.

7. The durable stop valve of claim 6, wherein: A rotating handle (14) is fixed to the top end of the pressure regulating screw (13) and located outside the air pressure chamber (12).

8. The durable stop valve according to any one of claims 1 to 7, characterized in that: An annular avoidance groove (15) is formed on the side of the gas-tight valve disc (7), and the seal air ring (9) is fixed in the avoidance groove (15) by adhesive bonding.

Images