Semi-ball valve with downstream pipe explosion emergency shutoff function

Abstract

The utility model provides a semi-ball valve with a downstream pipe burst emergency shutoff function, the two ends of a valve clack of the semi-ball valve are respectively connected with an upper valve rod and a lower valve rod, and when the valve clack rotates, a torsional spring generates elastic deformation; when the upper valve rod rotates to a first limit position, the upstream control channel is communicated with the main control channel; when the upper valve rod rotates to a second limit position, the main control channel is switched to be communicated with the downstream control channel; the downstream control channel communicates with a pressure relief guide valve in series, the pressure relief guide valve can block the positive pressure in the main control channel or enable the positive pressure in the main control channel to be discharged, and therefore whether the upper valve rod is connected with the valve clack or not is controlled. Liquid is injected into the main control channel through the upstream control pipeline, the valve clack and the valve rod are connected, when a large amount of fluid in the pipeline leaks out due to downstream pipe explosion, the pressure of the main control channel is controlled to be reduced, the valve clack and the upper valve rod are separated, the torsion spring drives the valve clack to reset, and water is prevented from leaking out continuously.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field especially is involved a kind of emergency shut-off function's hemispherical valve with downstream pipe burst. BACKGROUND

[0002] In urban water supply system, hemispherical valve is the key component of water supply, it can regulate the flow of medium in pipeline by its opening degree, so it is mainly applied to control the medium flow of each large-diameter pipeline, to ensure the safe and stable operation of system. In high-rise building, industrial production and urban water supply and other fields, with the acceleration of urbanization and the continuous growth of water supply demand, higher requirements are put forward for the performance, reliability and intelligent level of hemispherical valve.

[0003] In the application process of existing hemispherical valve, when encountering a large amount of drainage of downstream emergency leakage, the hemispherical valve located in upstream cannot find the leakage condition of downstream in time, so it cannot be closed in time, and continuous water supply is easy to cause a large amount of water resource waste; Therefore, how to timely shut down the hemispherical valve facing the emergency leakage of downstream is also a problem to be solved. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the utility model aims at providing a kind of hemispherical valve with emergency shut-off function of downstream pipe burst, to close valve body in time when emergency leakage occurs in downstream.

[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0006] A kind of hemispherical valve with emergency shut-off function of downstream pipe burst, comprising

[0007] Hemispherical valve body, comprising city water supply upstream end, city water supply downstream end and valve flap, both ends of the valve flap are connected with upper valve rod and lower valve rod respectively, torsional spring is connected between the lower valve rod and the hemispherical valve body, so that the lower valve rod can make the torsional spring elastically deform when rotating, and the upper valve rod is provided with main control channel;

[0008] Upper stream control channel, one end of which is communicated with city water supply upstream end, and the other end is communicated with main control channel, the outer wall of the upper valve rod is provided with upper valve rod upstream control channel along the circumference, when the valve rod rotates to the first limit position, the upstream control channel can be communicated with the main control channel through the upper valve rod upstream control channel, when the valve rod rotates to the second limit position, the main control channel is disconnected with the upstream control channel, the bottom end of the main control channel is provided with upper valve rod connecting column pin, and the liquid of city water supply end can enter the main control channel through the upstream control channel and insert the upper valve rod connecting column pin into the valve flap;

[0009] A downstream control channel is in communication with the downstream end of the city water supply at one end and in communication with the main control channel through an emergency shut-off control channel of the burst pipe at the other end, and a pressure relief guide valve is in series between the downstream control channel and the emergency shut-off control channel of the burst pipe, the pressure relief guide valve being capable of blocking the emergency shut-off control channel of the burst pipe when the water pressure in the downstream end of the city water supply is greater than a threshold value, and the liquid in the main control channel being capable of being discharged through the pressure relief guide valve when the water pressure in the downstream end of the city water supply is less than the threshold value.

[0010] Further, the upper valve rod further has an upper valve rod burst pipe emergency shut-off control channel, and the upper valve rod burst pipe emergency shut-off control channel is in communication with the main control channel when the upper valve rod upstream control channel is disconnected from the upstream control channel.

[0011] Further, the curvature of the upper valve rod upstream control channel is less than π / 2.

[0012] Further, the arc length of the upper valve rod burst pipe emergency shut-off control channel is equal to the sum of the arc length of the upper valve rod upstream control channel corresponding to an angle of 90° and the inner diameter of the upstream control channel.

[0013] Further, the angle corresponding to the arc of the upper valve rod burst pipe emergency shut-off control channel is 30°.

[0014] Further, the angle corresponding to the arc of the upper valve rod upstream control channel is 65°.

[0015] Further, a sealing sleeve is clamped between the upper valve rod and the upper valve rod hole of the valve body, and two through holes are formed in the sealing sleeve, and the upstream control channel and the burst pipe emergency shut-off control channel are in communication with the two through holes of the sealing sleeve, respectively.

[0016] Further, a receiving hole is formed in the top of the valve flap, and a pin return spring is arranged in the receiving hole, the end of the connecting pin of the upper valve rod abuts against the pin return spring, and the connecting pin can be inserted into the receiving hole.

[0017] Compared with the prior art, the hemispherical valve with a downstream burst pipe emergency shut-off function has the following advantages:

[0018] The upstream control pipeline is used to inject liquid into the main control channel, the connecting pin is inserted into the valve flap, and the valve flap is rotated by the upper valve rod, when the downstream burst pipe causes a large amount of fluid to be discharged from the pipeline, the pressure in the pipeline is rapidly reduced, the main control channel is in communication with the pressure discharge port of the pressure relief guide valve, the pressure in the main control channel is lower than the threshold value, the connecting pin is separated from the valve flap, the valve flap is rotated under the action of the torsional spring, and the hemispherical valve is closed, so that the liquid in the pipeline is prevented from being continuously discharged to cause waste.

[0019] The cooperation of the upstream control channel of the upper valve rod and the emergency shut-off control channel of the upper valve rod makes the upstream control channel and the main control channel disconnected while the main control channel and the emergency control channel of the upper valve rod are communicated during the rotation of the upper valve rod, so that the main control channel is kept at a preset pressure value, the connection pin and the valve disc are separated due to an accident, and the upstream control channel and the pressure relief port of the pressure relief pilot valve are directly communicated, so that the liquid in the pipeline is continuously discharged from the pressure relief pilot valve, causing resource waste.

[0020] The column pin reset spring can separate the connection pin and the valve disc in time when the pressure in the main control channel is less than a threshold value, so that the valve can be quickly and urgently closed. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and are used to interpret the specific embodiments of the present application and their descriptions, and do not constitute improper limitations on the present application. In the drawings:

[0022] Figure 1 is a schematic view of a sectional view of the overall structure of the half-ball valve;

[0023] Figure 2 is Figure 1 is an enlarged view of position A in the middle;

[0024] Figure 3 is Figure 1 is an enlarged view of position B in the middle;

[0025] Figure 4 is a cooperation schematic view of the main control channel and the emergency shut-off control channel of the burst pipe in a disconnected state;

[0026] Figure 5 is a cooperation schematic view of the main control channel and the upstream control channel in a communicated state.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 1-half-ball valve body; 2-city water upstream end; 3-city water downstream end; 4-valve disc; 5-upper valve rod; 6-lower valve rod; 7-torsional spring; 8-lower valve cover; 9-upstream control channel; 10-upper valve rod upstream control channel; 11-main control channel; 12-burst pipe emergency shut-off control channel; 13-upper valve rod burst pipe emergency shut-off control channel; 14-downstream control channel; 15-pressure relief pilot valve; 16-reversing valve core; 17-pressure relief port; 18-pilot valve reset spring; 19-connection pin; 20-receiving hole; 21-column pin reset spring; 22-sealing sleeve. DETAILED DESCRIPTION

[0029] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0030] In the description of the utility model, it needs to understand that, the orientation or position relation indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation based on the shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0031] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0032] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0033] The utility model discloses a hemispherical valve with downstream pipe burst emergency shutdown function, including hemispherical valve body 1, it includes city water supply upstream end 2, city water supply downstream end 3 and valve clapper 4, two ends of valve clapper 4 are connected with upper valve rod 5 and lower valve rod 6 respectively, torsional spring 7 is connected between lower valve rod 6 and hemispherical valve body 1, specifically, hemispherical valve body 1 bottom end is installed with lower valve cover 8, one end of torsional spring 7 is inserted into lower valve cover 8, and the other end torsional arm is connected with lower valve rod 6, when valve clapper 4 rotates, drives lower valve rod 6 to rotate, makes torsional spring 7 occur elastic deformation.

[0034] The upper valve stem 5 is provided with a main control channel 11, and an upstream control channel 9 is arranged on one side of the hemispherical valve body 1, one end of the upstream control channel 9 is communicated with the upstream end 2 of the city water supply, and the other end is communicated with the main control channel 11, so that the water in the upstream end 2 of the city water supply can flow into the main control channel 11, and the main control channel 11 has water pressure; the valve clack 4 is provided with a containing hole 20 at the top, and a pin reset spring 21 is arranged in the containing hole 20, the bottom end of the main control channel 11 is provided with a through hole in the radial direction, a connecting pin 19 is arranged in the through hole, and a sealing ring is arranged between the connecting pin 19 and the hole wall of the through hole, when the main control channel 11 has water pressure, the connecting pin 19 can be pushed outwards by the water pressure, so that the connecting pin 19 is inserted into the containing hole 20, and then the upper valve stem 5 and the valve clack 4 are connected as a whole, the pin reset spring 21 is arranged at the end of the connecting pin 19, when the water pressure in the main control channel 11 decreases to a threshold value, that is, the water pressure decreases to be less than the spring force, the pin reset spring 21 can push the connecting pin 19 to move into the valve stem, so that the valve clack 4 is separated from the valve stem and the connecting pin 19.

[0035] There is a preferred communication mode between the upstream control channel 9 and the main control channel 11, the outer wall of the upper valve stem 5 is provided with an upper valve stem upstream control channel 10 in the circumferential direction, the upper valve stem upstream control channel 10 is in an arc shape, specifically, the upper valve stem 5 is provided with a groove, and the outer wall of the upper valve stem 5 is wrapped with a sealing sleeve 22, the sealing sleeve 22 and the groove form the upper valve stem upstream control channel 10, the sealing sleeve is provided with a through hole, so that the upstream control channel 9 is communicated with the upper valve stem upstream control channel 10, one end of the main control channel 11 is communicated with the upper valve stem upstream control channel 10 through the through hole, when the valve stem rotates to the first limit position, the upstream control channel 9 can be communicated with the main control channel 11 through the upper valve stem upstream control channel 10, at this time, the water in the upstream end 2 of the city water supply can enter the main control channel 11; when the valve stem rotates to the second limit position, the main control channel 11 is disconnected with the upstream control channel 9, at this time, the water in the main control channel 11 is sealed, so that the connecting pin 19 remains in the state of extending outwards, so that the upper valve stem 5 is connected with the valve clack 4.

[0036] The hemispherical valve with the downstream pipe burst emergency shutdown function further comprises a downstream control channel 14, one end of the downstream control channel 14 is communicated with the downstream end 3 of the city water supply, the other end of the downstream control channel 14 is communicated with the main control channel 11 through the pipe burst emergency shutdown control channel 12, and a pressure relief guide valve 15 is arranged in series between the downstream control channel 14 and the pipe burst emergency shutdown control channel 12, when the water pressure in the downstream end 3 of the city water supply is greater than a threshold value, the pressure relief guide valve 15 can block the pipe burst emergency shutdown control channel 12, when the water pressure in the downstream end 3 of the city water supply is less than the threshold value, the liquid in the main control channel 11 can be discharged through the pressure relief guide valve 15.

[0037] For the emergency control passage of the burst pipe to be in communication with the main control passage 11, an outer wall of the upper valve rod 5 is provided with an upper valve rod burst pipe emergency shut-off control passage 13 in the form of an arc. Specifically, a groove is formed in the upper valve rod 5, and the upper valve rod burst pipe emergency shut-off control passage 13 is formed by the groove being surrounded by a sealing sleeve. The sealing sleeve is provided with a through hole, so that the upstream control passage 9 is in communication with the upper valve rod burst pipe emergency shut-off control passage 13. The upper valve rod burst pipe emergency shut-off control passage 13 is in communication with the main control passage 11 through the through hole. The end of the upper valve rod upstream control passage 10 is positioned directly above or below the starting end of the upper valve rod 5 burst pipe emergency control passage, so that when the main control passage 11 is disconnected from the upstream control passage 9, it is immediately connected to the burst pipe emergency control passage.

[0038] In order to maintain the water pressure in the main control passage 11 during operation, and to enable the ball valve to shut off in time when a burst pipe occurs downstream, preferably, one end of the pressure relief pilot valve 15 is in communication with the downstream control passage 14. The pressure relief pilot valve 15 includes a reversing valve core 16, and the reversing valve core 16 is pressed tightly by a pilot valve return spring 18, so that the reversing valve core 16 can block the communication between the pressure relief valve core and the downstream control passage 14. During the opening of the ball valve, the city water downstream end 3 gradually fills with liquid, so that the water pressure of the city water downstream end 3 gradually increases. The downstream control passage 14 is affected by the increase in the water pressure of the downstream end, so that the reversing valve core 16 moves upward against the pilot valve return spring 18, blocks the burst pipe emergency shut-off control passage 12, and prevents the liquid in the main control passage 11 from being discharged from the burst pipe emergency shut-off control passage 12. At this time, the main control passage 11 is disconnected from the upstream control passage 9 and connected to the burst pipe emergency shut-off control passage 12. As the valve rod continues to rotate, the water pressure of the city water downstream end 3 continues to increase, continuously pushing the reversing valve core 16 upward, so that the reversing valve core 16 blocks the pressure relief port 17 of the pressure relief pilot valve 15, and at the same time, the downstream control passage 14 is connected to the burst pipe emergency shut-off control passage 12 through the pressure relief pilot valve 15. The pressure in the medium in the downstream continues to provide pressure to the main control passage 11, so that the connecting column pin 19 is inserted into the valve disc 4, ensuring the reliable connection of the upper valve rod 5 and the valve disc 4. In order to achieve the above technical solution, the arcs of the upper valve rod upstream control passage 10 and the upper valve rod burst pipe emergency shut-off control passage 13 are each less than π / 2. More preferably, in this embodiment, the angle corresponding to the arc of the upper valve rod burst pipe emergency shut-off control passage 13 is 30°, and the angle corresponding to the arc of the upper valve rod upstream control passage 10 is 65°, so that the arc length of the upper valve rod burst pipe emergency shut-off control passage 13 is equal to the sum of the arc length of the upper valve rod 5 corresponding to a 90° angle and the inner diameter of the upstream control passage 9.

[0039] The ball valve with downstream burst pipe emergency shut-off function, in the normal opening process, the medium water in the pipeline enters the city water upstream end 2 of the ball valve, at this time the water pressure in the city water upstream end 2 is higher, the medium water can enter the upstream control channel 9, so that the connecting column pin 19 is stretched outwards under the action of water pressure, and then the upper valve rod 5 is connected with the valve disc 4 to form a whole, and the valve rod is rotated to control the rotation of the valve disc 4; in the embodiment, when the ball valve is opened by 60 degrees, the city water downstream end 3 is pressure-increased with the injection of the upstream medium water, part of the medium water enters the downstream control channel 14, so that the reversing valve core 16 overcomes the pressure of the pilot valve return spring 18, the communication between the burst pipe emergency shut-off control channel 12 and the pressure relief port 17 of the pressure relief pilot valve 15 is blocked, the downstream medium water enters the main control channel 11 through the downstream control channel 14, the internal cavity of the pressure relief pilot valve 15, the burst pipe emergency shut-off control channel 12 and the upper valve rod burst pipe emergency shut-off control channel 13, at this time the water pressure of the downstream medium water acts on the connecting column pin 19, so that the upper valve rod 5 is reliably connected with the valve disc 4, the valve rod can be continuously rotated to drive the valve disc 4 to rotate, when the valve rod is rotated more than 65 degrees, the main control channel 11 is disconnected with the upstream control channel 9, the connection between the upper valve rod 5 and the valve disc 4 is supported by the pressure of the downstream medium water, until the ball valve is completely opened, and in the rotation process of the upper valve rod 5 of the ball valve, the lower valve rod 6 is connected with the valve disc 4, so that the lower valve rod 6 is rotated, and the torsional spring 7 is elastically deformed; when the downstream emergency situation such as burst pipe occurs, the medium water in the pipeline is rapidly lost, the medium water pressure in the pipeline is rapidly reduced, and due to the increase of the water flow speed in the pipeline, the downstream control channel 14 generates negative pressure through the water flow injection principle, the medium water in the downstream control channel 14 is rapidly discharged, so that the reversing valve core 16 is displaced under the action of the pilot valve return spring 18, the burst pipe emergency shut-off control channel 12 is communicated with the pressure relief port of the pressure relief valve, so that the medium water in the main control channel 11 is discharged, the water pressure in the main control channel 11 is emptied, after losing the water pressure, the connecting column pin 19 is retracted into the main control channel 11 through the influence of the column pin return spring 21, so that the upper valve rod 5 is separated from the valve disc 4, the torsional spring 7 is lost, the lower valve rod 6 and the valve disc 4 are reset under the action of the torsional spring 7, the valve disc 4 is driven to rotate, so that the ball valve is urgently closed, and a large amount of water resource waste is prevented; after the pipeline is repaired in the downstream, the upper valve rod 5 is rotated to the initial position, so that the main control channel 11 is communicated with the upstream control channel 9, the water medium with pressure in the city water upstream end 2 reenters the main control channel 11, so that the column pin is stretched outwards and connected with the valve disc 4, the control of the upper valve rod 5 on the valve disc 4 is restored, so that the ball valve can be normally used.

[0040] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A semi-spherical valve with downstream burst tube emergency shutdown function, characterized in that: The utility model relates to a kind of city water supply control valve, including Spherical valve body (1), including city water supply upstream end (2), city water supply downstream end (3) and valve flap (4), the both ends of the valve flap (4) are connected with upper valve stem (5) and lower valve stem (6) respectively, torsion spring (7) is connected between the lower valve stem (6) and spherical valve body (1), so that lower valve stem (6) can make torsion spring (7) occur elastic deformation when rotating, main control passage (11) is opened in the upper valve stem (5); Upstream control passage (9), one end is communicated with city water supply upstream end (2), the other end is communicated with main control passage (11), the outer wall of the upper valve stem (5) is opened along the week upper valve stem upstream control passage (10), when valve stem rotates to first limit position, the upstream control passage (9) can be communicated with main control passage (11) by upper valve stem upstream control passage (10);When valve stem rotates to second limit position, main control passage (11) is disconnected with upstream control passage (9);The bottom end of the main control passage (11) is equipped with connecting column pin (19), and the liquid of city water supply end can enter main control passage (11) by upstream control passage (9) and insert connecting column pin (19) into valve flap (4). Downstream control passage (14), one end is communicated with city water supply downstream end (3), the other end is communicated with main control passage (11) by burst pipe emergency shutdown control passage (12), and pressure relief pilot valve (15) is connected between downstream control passage (14) and burst pipe emergency shutdown control passage (12), when the water pressure in city water supply downstream end (3) is greater than threshold value, pressure relief pilot valve (15) can block burst pipe emergency shutdown control passage (12), when the water pressure in city water supply downstream end (3) is less than threshold value, the liquid in main control passage (11) can be discharged through pressure relief pilot valve (15).

2. A semi-spherical valve with downstream burst tube emergency shut-off function according to claim 1, characterized in that: The upper valve stem (5) is also opened along the week upper valve stem burst pipe emergency shutdown control passage (13), and when the upper valve stem upstream control passage (10) is disconnected with upstream control passage (9), the upper valve stem burst pipe emergency shutdown control passage (13) is communicated with main control passage (11).

3. A semi-spherical valve with downstream burst tube emergency shut-off function according to claim 1, characterized in that: The radian of the upper valve stem upstream control passage (10) is less than pi / 2.

4. A semi-spherical valve with downstream burst tube emergency shut-off function according to claim 1, characterized in that: The arc length of the upper valve stem burst pipe emergency shutdown control passage (13) is equal to the sum of the arc length of the upper valve stem upstream control passage (10) and the inner diameter of the upstream control passage (9) corresponding to the angle of 90 °.

5. A semi-spherical valve with downstream burst tube emergency shut-off function according to claim 4, characterized in that: The angle corresponding to the arc of the upper valve stem burst pipe emergency shutdown control passage (13) is 30 °.

6. A semi-spherical valve with downstream burst tube emergency shut-off function according to claim 4, characterized in that: The angle corresponding to the arc of the upper valve stem upstream control passage (10) is 65 °.

7. A semi-spherical valve with downstream burst tube emergency shut-off function according to claim 1, characterized in that: The upper valve stem (5) and the upper valve stem (5) hole of spherical valve body (1) are clamped with sealing sleeve (22), and two through holes are opened on the sealing sleeve (22), the upstream control passage (9) and burst pipe emergency shutdown control passage (12) are communicated with two through holes of sealing sleeve (22) respectively.

8. A semi-spherical valve with downstream burst tube emergency shut-off function according to claim 1, characterized in that: The valve clack (4) is provided with a containing hole (20) on the top, and a pin reset spring (21) is arranged in the containing hole (20), the upper valve rod (5) is connected to the end of the pin (19) and is inserted into the containing hole (20).

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