Anti-freezing valve

Abstract

The anti-freezing valve is composed of a valve body, a water drainage device, a valve disc, a transmission rod heat insulation sleeve, a heat conduction rope and a pressure sensor, the transmission rod drives the valve disc to move up and down, the valve disc controls the water drainage device, when the valve disc is located at the opening position, the water drainage device is closed, water in the valve body cannot be drained, and when the valve disc is located at the closing position, the water drainage device is opened. According to the valve disclosed by the utility model, the combined action of the valve disc and the spring is utilized, so that the water in the valve body is automatically discharged when the valve is closed, and the heat insulation sleeve is used for preventing the loss of heat around the pressure sensor; the heat conduction rope conducts heat below the frozen soil layer to the position near the pressure sensor, the temperature of the pressure sensor is increased, the pressure sensor is prevented from being damaged due to too low temperature, and the device has the advantages of being simple in structure and good in reliability.

Description

Technical Field

[0001] This utility model relates to the field of valves, and in particular to an antifreeze valve. Background Technology

[0002] With the increasing number of outdoor valves, especially fire hydrants, many valves freeze and break every year. For smart valves, pressure sensors are particularly prone to freezing.

[0003] Patent CN211285824U discloses a novel intelligent fire hydrant, comprising a hydrant body, a valve body, a flange, a valve stem, a connecting rod, and a valve disc. The flange is located at the upper end of the hydrant body, and the valve body is connected to the lower end of the hydrant body. A first cavity for water flow is provided inside the hydrant body, and the connecting rod is located in the first cavity. The upper end of the valve stem extends out of the flange, and the lower end of the valve stem is connected to the valve disc via the connecting rod. The hydrant also includes an intelligent controller, a water pressure sensor, a water solenoid valve, a liquid level sensor, internal wires of a bushing-type coded switch, a first self-sealing tube head, a second self-sealing tube head, and a sealing tube.

[0004] The aforementioned patent uses a solenoid valve to drain the water from the fire hydrant when it is closed. This design is complex, and the drain valve is controlled by a solenoid valve. If there is a problem with the circuit, the valve may freeze and break. The pressure sensor in the solution does not have antifreeze measures, and this problem needs to be solved. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this utility model provides an antifreeze valve, which consists of a valve body, a drain device, a valve disc, a transmission rod, an insulation sleeve, a heat-conducting rope, and a pressure sensor. The drain device closes when the valve is open and opens when the valve is closed to drain the water accumulated inside the valve body. The heat-conducting rope is installed inside the insulation sleeve and is made of a material with a high thermal conductivity.

[0006] Furthermore, the transmission rod is a hollow rod that is connected to the valve disc, driving the valve disc to move axially up and down, and controlling the opening and closing of the valve.

[0007] Furthermore, the valve disc is controlled by a transmission rod; moving it upward closes the valve, and moving it downward opens the valve.

[0008] Furthermore, the drainage device consists of a slide valve, a spring, a locking plate, a drain port, and a water outlet. The drain port and water outlet are circular holes. The slide valve has a cylindrical shape at one end, a spherical crown shape at the other end, and an annular groove in the middle. When the valve is closed, the slide valve moves to the left under the push of the valve disc, and the drain port and water outlet are connected through the groove to drain the water accumulated in the valve body. When the valve is open, the slide valve moves to the right under the action of the spring, and the drain port and water outlet are disconnected.

[0009] Furthermore, the locking piece is annular and mounted on the body, restricting the slide valve from moving further to the right.

[0010] Furthermore, the pressure sensor is used to measure the water pressure of the system. One end is connected to a heat-conducting rope, and the other end is connected to a wire. The wire is used to provide power to the sensor and transmit signals.

[0011] Compared with existing technologies, the effects of this invention are positive and obvious.

[0012] 1. The valve of this utility model utilizes the combined action of the valve disc and the spring to automatically drain the water from the valve body when the valve is closed and to close the drain device when the valve is open. This solution features a simple structure and high reliability.

[0013] 2. Use an insulating sleeve to prevent heat loss around the pressure sensor, and use a heat-conducting rope to transfer heat from below the frozen soil layer to the vicinity of the pressure sensor, thereby increasing the temperature of the pressure sensor and preventing it from being damaged due to excessively low temperatures. Attached Figure Description

[0014] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0015] Figure 1 This is a partial sectional view of an antifreeze valve according to this utility model.

[0016] Figure 2 This is a partial view of area A of an antifreeze valve according to this utility model.

[0017] In the diagram: 1. Drive rod, 2. Wire, 3. Pressure sensor, 4. Valve disc, 5. Insulation sleeve, 6. Heat-conducting rope, 7. Valve body, 8. Water outlet, 9. Slide valve, 10. Spring, 11. Locking plate, 12. Drain outlet. Detailed Implementation

[0018] like Figure 1 , Figure 2 As shown, the present invention discloses an antifreeze valve, which consists of a valve body 7, a drain device, a valve disc 4, a transmission rod 1, an insulation sleeve 5, a heat-conducting rope 6, and a pressure sensor 3. The drain device closes when the valve is open and opens when the valve is closed to drain the water inside the valve body. The heat-conducting rope 6 is installed inside the insulation sleeve 5 and is made of a material with high thermal conductivity.

[0019] Furthermore, the transmission rod 1 is a hollow rod that is connected to the valve disc 4, driving the valve disc 4 to move axially up and down, and controlling the opening and closing of the valve.

[0020] Furthermore, the valve disc 4 is controlled by the transmission rod 1; moving it upward closes the valve, and moving it downward opens the valve.

[0021] Furthermore, the drainage device consists of a slide valve 9, a spring 10, a locking plate 11, a drain port 12, and a water outlet 8. The drain port 12 and the water outlet 8 are circular holes. The slide valve 9 has a cylindrical body at one end, a spherical crown at the other end, and an annular groove in the middle. When the valve is closed, the slide valve 9 moves to the left under the push of the valve disc 4. The drain port 12 and the water outlet 8 are connected through the groove to drain the water accumulated in the valve body. When the valve is open, the slide valve 9 moves to the right under the action of the spring 10, and the drain port 12 and the water outlet 8 are disconnected.

[0022] Furthermore, the locking piece 11 is annular and is mounted on the body to restrict the slide valve 9 from moving further to the right.

[0023] Furthermore, the heat-conducting rope 6 is installed inside the insulation sleeve 5 and is made of a material with high thermal conductivity.

[0024] Furthermore, the pressure sensor 3 is used to measure the water pressure of the system. One end is connected to the heat-conducting rope 6, and the other end is connected to the wire 2. The wire 2 is used to provide power to the pressure sensor 3 and transmit signals.

[0025] Specific working principle:

[0026] During the process of the valve opening and closing, the valve disc 4 moves upward under the drive of the transmission rod 1, gradually closing the valve. As the valve disc 4 moves upward, the side of the valve disc 4 pushes the spherical crown part of the slide valve 9, causing the slide valve 9 to move to the left. When it moves to the leftmost end, the drain port 12 and the outlet port 8 are connected through the annular groove of the slide valve 9, releasing the water accumulated in the valve body.

[0027] During the process of the valve going from closed to open, the side of the valve disc 4 gradually moves away from the spherical crown of the slide valve 9. The slide valve 9 moves to the right under the action of the spring 10. The locking plate 11 restricts the slide valve 9 from moving further to the right. The cylindrical part of the slide valve 9 blocks the drain port 12 and the outlet port 8, so the water in the valve body cannot flow out.

[0028] The use of the insulation sleeve 5 can prevent heat loss around the pressure sensor 3, and the heat-conducting rope 6 can conduct heat from below the frozen soil layer to the area around the pressure sensor 3. The above design can prevent the pressure sensor 3 from being damaged due to excessively low temperature.

[0029] The above description is only a preferred embodiment of this utility model. It should be noted that any other structural form that uses a valve disc to control the water volume in the valve body, or uses an insulating sleeve or heat-conducting rope to protect the pressure sensor, is also within the protection scope of this utility model.

Claims

1. A freeze-proof valve, which is composed of a valve body (7), a drain device, a valve disc (4), a transmission rod (1), a thermal insulation sleeve (5), a heat-conducting rope (6), and a pressure sensor (3), characterized in that: The drain device is closed when the valve is opened and opened when the valve is closed, draining the water accumulated inside the valve body, and the heat-conducting rope (6) is installed inside the heat-insulating sleeve (5) and made of a material with high heat conductivity.

2. A freeze-proof valve according to claim 1, wherein The transmission rod (1) is a hollow rod connected with the valve disc (4) to drive the valve disc (4) to move axially and control the opening and closing of the valve.

3. The freeze-proof valve according to claim 1, wherein The valve disc (4) is controlled by the transmission rod (1) to move upward to close the valve and move downward to open the valve.

4. The freeze-proof valve according to claim 1, wherein The drain device is composed of a slide valve (9), a spring (10), a locking plate (11), a drain port (12) and a water outlet (8), the drain port (12) and the water outlet (8) are circular holes, the slide valve (9) has a cylindrical body at one end, a spherical cap body at the other end and an annular groove in the middle, when the valve is closed, the slide valve (9) moves to the left end under the push of the valve disc (4), the drain port (12) and the water outlet (8) are connected through the groove to drain the water accumulated in the valve body, when the valve is opened, the slide valve (9) moves to the right end under the action of the spring (10), the drain port (12) and the water outlet (8) are disconnected.

5. A freeze-proof valve according to claim 4, wherein The locking plate (11) is a circular ring installed on the body to limit the further movement of the slide valve (9) to the right.

6. The freeze-proof valve according to claim 1, wherein The pressure sensor (3) is used to measure the water pressure of the system, one end of which is connected with the heat-conducting rope (6) and the other end is connected with a wire (2) used to provide power supply and transmit signals for the sensor (3).

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