CN218598838U - Control system of dome valve - Google Patents

Abstract

The invention discloses a control system of a dome valve, which comprises a main control valve, an auxiliary control valve, a gas container, a one-way valve, a control valve and an actuator, wherein the auxiliary control valve comprises a first gas inlet, a first gas outlet and a second gas outlet; the main control valve is connected with the air source and the auxiliary control valve, and controls the first air inlet to be communicated with the first air outlet or to be communicated with the second air outlet.

Description

Control system of dome valve

Technical Field

The utility model relates to a solid material valve field, especially a control system of dome valve.

Background

When various loose, dry and non-sticky solid materials need to be conveyed in the existing thermal power plants, steel plants, metallurgical plants and the like, a dome valve is usually adopted as a sealing valve of a conveying channel. The existing dome valve has a spherical dome valve core, and in the opening and closing process of the dome valve, a gap of about 2mm is kept between the valve core and a rubber sealing ring, so that the valve core and the rubber sealing ring can move in a non-contact manner, and the purpose is to prevent friction between the valve core and the rubber sealing ring and reduce abrasion. The pneumatic actuating element of the dome valve is a fully-sealed linear or fan-shaped cylinder which directly drives the dome valve to rotate, thereby effectively preventing the phenomena of abrasion, leakage and the like caused by dust entering the dome valve. When the dome valve is in a closed state, the rubber sealing ring is inflated and expanded to tightly press on the spherical dome valve core, so that a very reliable sealing ring belt is formed to prevent the flow of materials in the pipeline. However, when the air source fails, the rubber seal ring cannot be inflated, the dome valve core cannot be sealed, and leakage occurs.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the air source fails and the dome valve cannot be sealed.

The utility model provides an above-mentioned technical problem provides a control system of dome valve.

The technical scheme of the utility model is that:

a control system of a dome valve supplies air by an air source and comprises a main control valve, an auxiliary control valve, an air container, a one-way valve, a control valve and an actuator, wherein the auxiliary control valve comprises a first air inlet, a first air outlet and a second air outlet; the main control valve is connected with the air source and the auxiliary control valve, and controls the first air inlet to be communicated with the first air outlet or to be communicated with the second air outlet.

Furthermore, the auxiliary control valve further comprises a first exhaust port, a second exhaust port and a first valve core, the main control valve controls the movement of the first valve core, and the first valve core realizes the communication between the first air outlet and the first exhaust port or the communication between the second air outlet and the second exhaust port through the movement.

Furthermore, the main control valve comprises a second valve core, a second air inlet, a third air outlet and a third air outlet, the auxiliary control valve further comprises a pneumatic control port, the second air inlet is connected with an air source, the third air outlet is connected with the pneumatic control port and enables the first valve core to move through air supply to the pneumatic control port, and the second valve core is communicated with the second air inlet or the third air outlet through movement of the third air outlet.

Further, the actuator includes a drive mechanism coupled to the dome valve and a control member cooperating with the control valve for opening or closing the control valve.

Further, still include relief pressure valve and discharge valve, the relief pressure valve sets up between check valve and air supply and between main control valve and air supply, and the discharge valve sets up between control valve and dome valve sealing washer.

Furthermore, actuating mechanism includes elastic component, piston and drive shaft, and the piston divides into cavity and No. two cavities in the executor inside, and No. one cavity communicates with No. two gas outlets, and the drive shaft is located cavity, and the elastic component is located cavity No. two, and the piston is connected with the drive shaft and is used for driving the drive shaft and rotates.

Further, the actuator further comprises a coupler, the coupler is arranged between the driving mechanism and the dome valve, and the control piece is fixedly connected with the coupler.

Furthermore, the elastic part is a spring, the driving shaft is provided with a gear, the piston is provided with a rack, and the rack is meshed with the gear.

Furthermore, the control valve is provided with a button, and the control piece is matched with the button.

Furthermore, the main control valve is connected with the gas container through a circuit, and the main control valve controls the gas container to work or not work.

Compared with the prior art, the utility model have following advantage and effect:

the utility model discloses when the unable air feed of air supply trouble, utilize gas container to play the function that prevents to lose gas for the calotte valve air feed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic view of an air path system of embodiment 1;

FIG. 2 is a schematic view of the dome valve in embodiment 1;

FIG. 3 is a structural view of a drive mechanism in embodiment 1;

FIG. 4 isbase:Sub>A schematic view of section A-A of FIG. 2;

FIG. 5 is a diagram showing another embodiment of example 1.

Description of the reference symbols:

1-a main control valve; 2-an actuator; 3-auxiliary control valve; 4-a gas container; 5-a one-way valve;

6-inlet port number one; 7-air outlet I; 8-air outlet II; 9-a control valve;

10-a gas source; 11-vent number one; 12-vent number two; 13-a dome valve;

14-air control port; 15-inlet number two; 16-third air outlet; 17-number three exhaust port;

18-a three-way connection; 19-a pressure relief valve; 20-a gas outlet valve; 21-dome valve seal ring;

22-dome valve spool; 23-a control member; 24-a coupling; 25-a button; 26-an elastic member;

27-a piston; 28-chamber number one; 29-chamber No. two; 30-a gear; 31-a rack; 32-a scaffold;

33-drive shaft.

Detailed Description

The present invention will be described in further detail with reference to the following examples, which are provided for the purpose of explanation and are not intended to limit the present invention.

In the following description, any component described with respect to one figure in various embodiments of the present invention may be equivalent to the component having the same name described with respect to any other figure. Throughout the specification, ordinal numbers (e.g., first, second, third, etc.) are used as adjectives for elements (i.e., any noun in the present application). The use of ordinal numbers does not imply or constitute a particular order of the elements or limit any elements to only a single element, and are used to distinguish between different elements.

Example 1: a control system of a dome valve is supplied with air by an air source, the air source is air supply equipment of an existing air path system, and the dome valve can adopt the structure of an existing pneumatic dome valve. The control system comprises a main control valve, an auxiliary control valve, a gas container, a one-way valve, a control valve and an actuator. The main control valve and the auxiliary control valve are provided with a plurality of through holes, the valve cores of the main control valve and the auxiliary control valve are provided with at least two working positions, and the working positions of the valve cores of the main control valve and the auxiliary control valve can be switched in a manual mode, a pneumatic control mode, an electric control mode or other modes, such as a two-position three-way electromagnetic valve, a two-position five-way pneumatic control valve, a two-position five-way electromagnetic valve, a manual mechanical valve and the like. The gas container may be any structure that stores gas, and the gas container may be capable of supplying gas, such as a gas tank, a pressure container with an air pump, an air compressor buffer cylinder, and the like. The control valve can cut off and open the passage in the valve in a manual mode, a pneumatic control mode, an electric control mode or other modes. The actuator can adopt an existing pneumatic actuator, such as a single-acting air cylinder and a double-acting air cylinder.

In one embodiment, as shown in fig. 1, the auxiliary control valve 3 is a two-position five-way pneumatic control valve, the auxiliary control valve 3 includes a first air inlet 6, a first air outlet 7, a second air outlet 8, a first air outlet 11, a second air outlet 12 and a pneumatic control port 14, and a first valve core is arranged in the auxiliary control valve 3. The main control valve 1 is a two-position three-way electromagnetic valve, the main control valve 1 comprises a second air inlet 15, a third air outlet 16 and a third air outlet 17, and a second valve core is arranged in the main control valve 1. The gas source 10 is connected with a three-way joint 18, the three-way joint 18 is further connected with the one-way valve 5 and the second gas inlet 15, preferably, a pressure reducing valve 19 can be arranged between the gas source 10 and the three-way joint 18, and the pressure reducing valve 19 can reduce high-pressure gas to required medium-pressure or low-pressure gas. The input end of the one-way valve 5 is connected with the three-way joint 18, the output end of the one-way valve is connected with the gas container 4, the gas container 4 is a pressure container with a gas pump, the gas container 4 is connected with the first gas inlet 6, the first gas outlet 7 is connected with the control valve 9, the second gas outlet 8 is connected with the actuator 2, the third gas outlet 16 is connected with the gas control port 14, the third gas outlet 17 can be externally connected with exhaust equipment or directly communicated with the atmosphere, and similarly, the first gas outlet 11 and the second gas outlet 12 can be externally connected with exhaust equipment or directly communicated with the atmosphere. As shown in fig. 2, the actuator 2 is connected to the dome valve, and preferably, a coupling 24 may be provided between the actuator 2 and the dome valve 13. The actuator comprises a driving mechanism and a control piece, the control piece is driven to move through the driving mechanism, as shown in fig. 3, the actuator is a single-acting cylinder, the driving mechanism comprises an elastic piece 26, a piston 27 and a driving shaft 33, the piston 27 divides the interior of the actuator into a first chamber 28 and a second chamber 29, the first chamber 28 is communicated with a second air outlet 8, the driving shaft 33 is located in the first chamber 28, the driving shaft 33 is fixedly connected with a coupler 24, the elastic piece 26 is located in the second chamber 29, the piston 27 is connected with the driving shaft 33, the elastic piece 26 selects a spring, the driving shaft 33 is provided with a gear 30, the piston 27 is provided with a rack 31, and the rack 31 is meshed with the gear 30. The control member can control the control valve to be cut off and opened, the control member can be fixed on a driving shaft or a coupling, as shown in fig. 4, the control member 23 is an L-shaped rod, the control member 23 is fixed on the coupling 24, the control valve 9 is a mechanical valve, the control valve 9 is provided with a button 25, as shown in fig. 2 and 4, the control valve 9 is connected with a dome valve sealing ring 21, and preferably, an exhaust valve 20 can be arranged between the two. Preferably, the main control valve 1 is connected with a control circuit of the gas container 4 through a lead, the main control valve 1 sends a signal to the control circuit of the gas container 4, the control circuit controls the operation or non-operation of a gas pump of the gas container 4 according to the obtained signal, the operation state is that the gas pump is started to convey the gas in the gas container 4 outwards, the non-operation state is that the gas pump is closed, and the gas container 4 is only used as a gas storage tank. When the main control valve 1 loses air, the main control valve 1 sends a signal, the air pump is started, and the air container 4 supplies air to the outside. In this embodiment, the connection between the elements may be any pipes such as PVC pipes and metal pipes; in addition, a bracket 32 may be provided for securing the control valve 9, the coupling 24 and the conduit.

In a modified example, the gas container 4 may be arranged in a manner as shown in fig. 5, an input end of the check valve 5 is connected to the three-way joint 18, an output end of the check valve is connected to the gas container 4, the gas container 4 is a gas tank, a gas pump is arranged on the gas tank, and the gas container 4 is connected to the first gas inlet 6.

The working mode of the embodiment is as follows: when the gas source supplies gas normally, the gas container 4 does not work. When the dome valve is to be closed, a second valve core in the main control valve 1 communicates a third air outlet 16 with a third air outlet 17, a second air inlet 15 is not communicated with the third air outlet 16, air in the third air outlet 16 is discharged from the third air outlet 17, an air control port 14 is exhausted, a first valve core communicates a first air inlet 6 with a first air outlet 7, a control valve 9 is used for air inlet, the first air inlet 6 is not communicated with a second air outlet 8, so that the actuator 2 is exhausted, a driving shaft 33 rotates under the action of an elastic piece 26, the driving shaft 33 drives a dome valve core 22 to rotate through a coupler 24 until the dome valve core is completely closed, when the dome valve is completely closed, a control piece 23 just presses a button 25, the control valve 9 opens a passage in the valve, at the moment, the gas container 4 does not work, gas in a gas source enters the dome valve sealing ring 21 through the gas container 4 and the control valve 9, the dome valve sealing ring 21 is inflated, and a ring-shaped sealing strip is formed to block materials; when the first air inlet 6 is not communicated with the second air outlet 8, the second air outlet 8 is communicated with the second air outlet 12, and the gas in the actuator 2 can be discharged through the second air outlet 12. When the gas source supplies gas normally, the dome valve needs to be opened, the second valve core in the main control valve 1 is used for communicating the second gas inlet 15 with the third gas outlet 16, the third gas outlet 16 is not communicated with the third gas outlet 17, the gas control port 14 is used for gas inlet, the first valve core is used for communicating the first gas inlet 6 with the second gas outlet 8, the actuator 2 is used for gas inlet, the first gas inlet 6 is not communicated with the first gas outlet 7, so that the control valve 9 loses gas, the driving shaft 33 rotates reversely under the action of the gas, and the driving shaft 33 drives the dome valve core 22 to rotate reversely through the coupler 24 until the dome valve core is completely opened; when the first air inlet 6 and the first air outlet 7 are not communicated, the first air outlet 7 is communicated with the first air outlet 11, the air in the dome valve sealing ring 21 can be discharged through the second air outlet 12, and when the exhaust valve 20 is arranged, the air in the dome valve sealing ring 21 can be discharged through the exhaust valve 20. When the unable air feed of air supply broke down, the main control valve 1 loses gas, and the gas accuse port 14 loses gas thereupon, and a case communicates air inlet 6 and gas outlet 7 No. one, and at this moment, gas container 4 works, begins the air feed, and check valve 5 prevents that gas of gas container 4 from passing through check valve 5, and gas of gas container 4 lets in air inlet 6 No. one, inflates dome valve sealing washer 21 by gas container 4, prevents to lead to the problem appearance of sealed unable wall material that does not tightly because the air supply loses gas.

Further, as for the main control valve and the auxiliary control valve in the above embodiment, another structure may be adopted, the auxiliary control valve may adopt a two-position three-way electromagnetic valve or a two-position four-way electromagnetic valve (without a first exhaust port) or a two-position six-way electromagnetic valve (without a plurality of ports), the main control valve may adopt a device for detecting the gas supply state of the gas source, the main control valve may feed the gas supply state of the gas source back to the auxiliary control valve, and further control the first gas inlet to be communicated with the first gas outlet or to be communicated with the second gas outlet, for example, the main control valve adopts an electronic control barometer, and when the dome valve is to be closed, the gas supply state of the gas source, for example, the gas pressure is normal, if the gas source supplies gas normally, the main control valve feeds a signal back to the auxiliary control valve and the gas container, the gas container does not intervene, and if the gas source supplies gas abnormally, the main control valve feeds back a signal to the auxiliary control valve and the gas container, the gas container intervenes in gas supply starts to supply, and the first gas valve controls the first gas inlet to be communicated with the first gas outlet; similarly, when the dome valve is to be opened, the air supply state of the air source can be detected through the main control valve, if the air source supplies air normally, the main control valve feeds back a signal to the auxiliary control valve, and the first valve core controls the first air inlet to be communicated with the second air outlet.

Further, as for the control member and the control valve in the above embodiment, another structure may be adopted, and the control valve may be a solenoid valve, the control member being a device for detecting the rotation angle of the drive shaft or the stroke of the piston, the control member being in the same circuit as the control valve, such as a distance sensor provided in the second chamber, and when the control member detects that the piston is located at the farthest position, the control member sends a signal to the control valve, and the control valve opens the passage in the valve.

In addition, it should be noted that the specific embodiments described in the present specification may be different in terms of the parts, the shapes of the components, the names of the components, and the like. All according to the utility model discloses an equal or simple change that structure, characteristic and principle were done, all include in the utility model discloses a protection scope. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims (10)

1. A control system of a dome valve is characterized by comprising a main control valve, an auxiliary control valve, a gas container, a one-way valve, a control valve and an actuator, wherein the auxiliary control valve comprises a first gas inlet, a first gas outlet and a second gas outlet; the main control valve is connected with the air source and the auxiliary control valve, and controls the first air inlet to be communicated with the first air outlet or to be communicated with the second air outlet.

2. The control system of a dome valve according to claim 1, wherein the secondary control valve further comprises a first exhaust port, a second exhaust port, and a first valve element, the primary control valve controls movement of the first valve element, and the first valve element moves to communicate the first exhaust port with the first exhaust port or the second exhaust port with the second exhaust port.

3. The control system of a dome valve according to claim 1, wherein the main control valve comprises a second valve core, a second air inlet, a third air outlet and a third air outlet, the auxiliary control valve further comprises an air control port, the second air inlet is connected with an air source, the third air outlet is connected with the air control port and enables the first valve core to move by supplying air to the air control port, and the second valve core enables the third air outlet to be communicated with the second air inlet or the third air outlet by moving.

4. The control system for a dome valve of claim 1, wherein the actuator comprises an actuator connected to the dome valve and a control member cooperating with the control valve for opening or closing the control valve.

5. The control system for a dome valve of claim 1, further comprising a pressure relief valve and a vent valve, the pressure relief valve disposed between the one-way valve and the gas source and between the main control valve and the gas source, the vent valve disposed between the control valve and the dome valve seal.

6. The control system of a dome valve according to claim 4, wherein the drive mechanism comprises a resilient member, a piston, and a drive shaft, the piston separating the interior of the actuator into a first chamber and a second chamber, the first chamber communicating with the second outlet port, the drive shaft being located in the first chamber, the resilient member being located in the second chamber, the piston being connected to the drive shaft and being configured to rotate the drive shaft.

7. The control system for a dome valve of claim 4, wherein the actuator further comprises a coupling disposed between the drive mechanism and the dome valve, and the control member is secured to the coupling.

8. A control system for a dome valve according to claim 6, characterized in that the resilient member is a spring, the drive shaft is provided with a gear wheel and the piston is provided with a rack, which is in mesh with the gear wheel.

9. A control system for a dome valve according to claim 4, characterized in that the control valve is provided with a push button, and the control element cooperates with the push button.

10. A control system for a dome valve according to any of claims 1-9, characterized in that the main control valve is connected to the gas container by an electric circuit, the main control valve controlling the operation or non-operation of the gas container.

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