阅读说明：本技术 一种带气辅密封的多路阀 (Multi-way valve with gas-assisted sealing function ) 是由 王志飞 毕雪 于 2021-07-05 设计创作，主要内容包括：一种带气辅密封的多路阀,包括阀体、主阀、气辅阀；阀体为多边形厚板状,下端面设有主流道,上端面设有若干分流道,主流道与若干分流道相互连通；主阀设置在阀体侧面,其数量与分流道数量相等,每个主阀控制相对应分流道的通断；气辅阀设置在阀体下端面,其数量与主阀数量相等,每个气辅阀控制相对应主阀密封气源的通断；本使用新型的带气辅密封的多路阀能代替多个独立阀门和多个三通管件连接实现的功能,因此可大幅降低工程施工中阀门和三通数量,使得工程造价及施工成本大幅降低,同时也降低了实际运维工作量及成本；另外,本阀门带有的气辅密封功能极大改善了石化行业跑、冒、滴、漏的固疾,改善了生产环境,也极大保证了生产安全。(A multi-way valve with gas-assisted sealing comprises a valve body, a main valve and a gas-assisted valve; the valve body is in a polygonal thick plate shape, a main runner is arranged on the lower end face, a plurality of sub-runners are arranged on the upper end face, and the main runner is communicated with the sub-runners; the main valves are arranged on the side surface of the valve body, the number of the main valves is equal to that of the branch runners, and each main valve controls the on-off of the corresponding branch runner; the gas auxiliary valves are arranged on the lower end face of the valve body, the number of the gas auxiliary valves is equal to that of the main valves, and each gas auxiliary valve controls the on-off of a sealing gas source of the corresponding main valve; the novel multi-way valve with the gas-assisted seal can replace the function realized by connecting a plurality of independent valves and a plurality of three-way pipes, so that the number of the valves and the three-way pipes in engineering construction can be greatly reduced, the engineering cost and the construction cost are greatly reduced, and the actual operation and maintenance workload and cost are also reduced; in addition, the gas-assisted sealing function of the valve greatly improves the solid diseases of running, overflowing, dripping and leaking in the petrochemical industry, improves the production environment and also greatly ensures the production safety.)

1. A multi-way valve with gas-assisted sealing is characterized in that: comprises a valve body (1), a main valve (2) and an air auxiliary valve (3); the valve body (1) is in a polygonal thick plate shape, a main runner (1.1) is arranged on the lower end face, a plurality of sub-runners (1.2) are arranged on the upper end face, and the main runner (1.1) is communicated with the sub-runners (1.2); the side surface of the valve body (1) is provided with a main valve seat cavity corresponding to the sub-runner (1.2); the side surface or the lower end surface of the valve body (1) is provided with an air auxiliary valve seat cavity corresponding to the main valve seat cavity;

the number of the main valves (2) is equal to that of the sub-runners (1.2), the main valves (2) are arranged on the side surface of the valve body (1), and each main valve (2) controls the on-off of the corresponding sub-runner (1.2); the number of the gas auxiliary valves (3) is equal to that of the main valves (2), the gas auxiliary valves (3) are arranged on the side surface or the lower end surface of the valve body (1), and each gas auxiliary valve (3) controls the on-off of a sealed gas source of the corresponding main valve (2).

2. The multiple-way valve with gas-assisted seal of claim 1, wherein: the main valve (2) comprises a main valve seat (2.1), a main valve core (2.6), a main valve rod seat (2.7) and a main valve screw rod (2.9); the main valve seat (2.1) is annular and is fixedly arranged in a main valve seat cavity of the valve body (1), and a through hole is arranged on the annular wall of the main valve seat (2.1) and is communicated with the sub-runner (1.2); the main valve core (2.6) is arranged in the inner cavity of the main valve seat (2.1) in a sliding manner, slides along the axis of the inner cavity of the main valve seat (2.1), and opens or closes the communication between the corresponding sub-flow passage (1.2) and the main flow passage (1.1);

a valve seat fixing ring (2.2) is arranged on the outer side of the main valve seat (2.1), a main valve cover (2.3) is arranged on the outer side of the valve seat fixing ring (2.2), and the main valve cover (2.3) is fixedly connected with the valve body (1); the main valve core (2.6) is fixedly connected with a main valve rod (2.6.1), and a main valve packing (2.4) is arranged between the main valve rod (2.6.1) and the main valve cover (2.3) and is pressed by a main valve packing pressing cover (2.5); the main valve rod seat (2.7) is fixedly connected with the valve body (1) through a main valve supporting rod (2.8); the main valve screw (2.9) is fixedly connected with the main valve rod (2.6.1) through a main valve rod clamp (2.10); a lead screw nut A is rotatably arranged on the main valve rod seat (2.7), the lead screw nut A is meshed with the main valve screw rod (2.9), and the main valve screw rod (2.9) is driven to do linear motion by rotating the lead screw nut A.

3. The multiple-way valve with gas-assisted seal of claim 2, wherein: a main valve rod guide plate (2.11) is fixedly arranged on the main valve screw rod (2.9), the main valve rod guide plate (2.11) is rectangular plate-shaped, anti-rotation clamping grooves are formed in two ends of the main valve rod guide plate, and the anti-rotation clamping grooves are clamped on the main valve support rod (2.8) in a sliding mode.

4. The multiple-way valve with gas-assisted seal of claim 3, wherein: a sealing gasket is arranged between the end surface of the inner side of the main valve seat (2.1) and the end surface of the main valve seat cavity; a sealing gasket is arranged between the end surface of the main valve cover (2.3) and the valve body (1).

5. The multiple-way valve with gas-assisted seal of claim 1, wherein: the gas auxiliary valve (3) comprises a gas auxiliary valve seat (3.1), a gas auxiliary valve core (3.6), a gas auxiliary valve rod seat (3.7) and a gas auxiliary valve screw (3.9); the air-assisted valve seat (3.1) is annular and is fixedly arranged in an air-assisted valve seat cavity of the valve body (1), and the inner cavity is communicated with the inner cavity of the corresponding main valve seat (2.1); the gas auxiliary valve core (3.6) is arranged in the inner cavity of the gas auxiliary valve seat (3.1) in a sliding manner, slides along the axis of the inner cavity of the gas auxiliary valve seat (3.1), and opens or closes the communication between the cavity of the corresponding auxiliary valve seat (3.1) and a sealed gas source;

an air-assisted valve seat fixing ring (3.2) is arranged on the outer side of the air-assisted valve seat (3.1), an air-assisted valve cover (3.3) is arranged on the outer side of the air-assisted valve seat fixing ring (3.2), and the air-assisted valve cover (3.3) is fixedly connected with the valve body (1); the gas-assisted valve core (3.6) fixes the gas-assisted valve rod (3.6.1), and a gas-assisted valve packing (3.4) is arranged between the gas-assisted valve rod (3.6.1) and the gas-assisted valve cover (3.3) and is pressed by a gas-assisted valve packing gland (3.5); the gas-assisted valve rod seat (3.7) is fixedly connected with the valve body (1) through a gas-assisted valve supporting rod (3.8); the gas-assisted valve screw rod (3.9) is fixedly connected with the gas-assisted valve rod (3.6.1) through a gas-assisted valve rod clamp (3.10); a screw nut B is rotatably arranged on the air-assisted valve rod seat (3.7), the screw nut B is meshed with the air-assisted valve screw rod (3.9), and the air-assisted valve screw rod (3.9) is driven to do linear motion by rotating the screw nut B; the gas-assisted valve cover (3.3) is fixedly provided with a sealing gas connecting flange (3.3.1), and the sealing gas connecting flange (3.3.1) is provided with a gas passage communicated with the cavity of the gas-assisted valve seat (3.1).

6. The multiple-way valve with gas-assisted seal of claim 5, wherein: the gas-assisted valve screw (3.9) is fixedly provided with a gas-assisted valve rod guide plate (3.11), the gas-assisted valve rod guide plate (3.11) is rectangular plate-shaped, two ends of the gas-assisted valve rod guide plate are provided with anti-rotation clamping grooves, and the anti-rotation clamping grooves are slidably clamped on the gas-assisted valve support rod (3.8).

7. The multiple-way valve with gas-assisted seal of claim 6, wherein: a sealing gasket is arranged between the end surface of the inner side of the air auxiliary valve seat (3.1) and the end surface of the cavity of the air auxiliary valve seat; a sealing gasket is arranged between the end surface of the gas-assisted valve cover (3.3) and the valve body (1).

Technical Field

The invention relates to the technical field of valves in the petrochemical industry, in particular to a multi-way valve with gas-assisted sealing for the petrochemical industry.

Background

In the design of oil and gas pipelines in the petrochemical industry, the connection condition of combining multiple pipelines or shunting multiple pipelines of one pipeline is often met, and the connection is realized by connecting a plurality of independent valves and a plurality of tee pipe fittings under the common condition; however, the connection mode has the problems of large quantity of valves and tee joints, large connection workload and high cost, and also has the problems of large valve maintenance workload and high maintenance cost due to the existence of more valves.

Disclosure of Invention

In order to overcome the defects in the background art, the invention discloses a multi-way valve with gas-assisted sealing, which comprises a valve body, a main valve and a gas-assisted valve; the valve body is in a polygonal thick plate shape, a main runner is arranged on the lower end face, a plurality of sub-runners are arranged on the upper end face, and the main runner is communicated with the sub-runners; the main valves are arranged on the side surface of the valve body, the number of the main valves is equal to that of the branch runners, and each main valve controls the on-off of the corresponding branch runner, so that the function of the multi-way valve is realized; the gas auxiliary valves are arranged on the lower end face of the valve body, the number of the gas auxiliary valves is equal to that of the main valves, each gas auxiliary valve controls the on-off of the corresponding main valve sealing gas source, and the gas auxiliary valves are communicated with the auxiliary sealing gas sources during working, so that gas auxiliary sealing of all the main valves is realized.

In order to realize the purpose, the invention adopts the following technical scheme: a multi-way valve with gas-assisted sealing comprises a valve body, a main valve and a gas-assisted valve; the valve body is in a polygonal thick plate shape, a main runner is arranged on the lower end face, a plurality of sub-runners are arranged on the upper end face, and the main runner is communicated with the sub-runners; the side surface of the valve body is provided with a main valve seat cavity corresponding to the branch flow passage; the side surface or the lower end surface of the valve body is provided with an air auxiliary valve seat cavity corresponding to the main valve seat cavity;

the number of the main valves is equal to that of the branch channels, the main valves are arranged on the side face of the valve body, and each main valve controls the on-off of the corresponding branch channel to realize the function of the multi-way valve; the number of the gas auxiliary valves is equal to that of the main valves, the gas auxiliary valves are arranged on the side face or the lower end face of the valve body, each gas auxiliary valve controls the on-off of a corresponding main valve sealing gas source, and the gas auxiliary valves are communicated with the auxiliary sealing gas sources during working so as to realize gas auxiliary sealing of the main valves.

Furthermore, the main valve comprises a main valve seat, a main valve core, a main valve rod seat and a main valve screw rod; the main valve seat is annular and fixedly arranged in a main valve seat cavity of the valve body, an anti-rotation structure is arranged between the main valve seat and the main valve seat cavity of the valve body, and a through hole is arranged on the annular wall of the main valve seat and communicated with the sub-runner; the main valve core is arranged in an inner cavity of the main valve seat in a sliding mode and slides along the axis of the inner cavity of the main valve seat, when the main valve core is arranged along the inner side of the inner cavity of the main valve seat, the communication between the corresponding sub-runners and the main runner is cut off, and when the main valve core is arranged along the outer side of the inner cavity of the main valve seat, the communication between the corresponding sub-runners and the main runner is opened; the main valve seat and the main valve core are both replaceable structures, and when the main valve seat and the main valve core are worn and eroded, the main valve seat and the main valve core can be replaced online during maintenance of the multi-way valve, and the valve is prevented from being repaired by returning to the factory, so that the maintenance cost and the maintenance period are both greatly improved;

a valve seat fixing ring is arranged on the outer side of the main valve seat, a main valve cover is arranged on the outer side of the valve seat fixing ring, and the main valve cover is fixedly connected with the valve body; the main valve core is fixedly connected with a main valve rod, a main valve packing is arranged between the main valve rod and the main valve cover and is tightly pressed through a main valve packing pressing cover; the main valve rod seat is fixedly connected with the valve body through a main valve supporting rod; the main valve screw is fixedly connected with the main valve rod through a main valve rod clamp; a screw nut A is rotatably arranged on the main valve rod seat and meshed with the main valve screw rod, the main valve screw rod is driven to do linear motion by rotating the screw nut A, and the main valve screw rod drives the main valve rod to do linear motion, so that the main valve core slides in the inner cavity of the main valve seat.

Furthermore, a main valve rod guide plate is fixedly arranged on the main valve screw, a flat key is arranged between the guide plate and the main valve screw, the main valve rod guide plate is rectangular, anti-rotation clamping grooves are formed in two ends of the main valve rod guide plate, the anti-rotation clamping grooves are slidably clamped on the main valve support rod, and the guide plate is used for preventing the main valve screw from being driven to rotate when the lead screw nut rotates.

Furthermore, a sealing gasket is arranged between the end surface of the inner side of the main valve seat and the end surface of the main valve seat cavity; a sealing gasket is arranged between the end face of the main valve cover and the valve body.

Further, the gas-assisted valve comprises a gas-assisted valve seat, a gas-assisted valve core, a gas-assisted valve rod seat and a gas-assisted valve screw rod; the gas-assisted valve seat is annular and is fixedly arranged in a gas-assisted valve seat cavity of the valve body, an inner cavity is communicated with an inner cavity of the corresponding main valve seat, and an anti-rotation structure is arranged between the gas-assisted valve seat and the gas-assisted valve seat cavity of the valve body; the gas auxiliary valve core is arranged in the inner cavity of the gas auxiliary valve seat in a sliding manner, slides along the axis of the inner cavity of the gas auxiliary valve seat, and opens or closes the communication between the corresponding auxiliary valve seat cavity and the sealed gas source; when the main valve corresponding to the gas auxiliary valve is in a closed state, the gas auxiliary valve is opened, and the auxiliary gas source enters the inner cavity of the main valve seat through the sealing gas connecting flange, so that the inner cavity of the main valve seat keeps a high-pressure body, and the working medium in the main flow passage or other branch flow passages is prevented from entering the closed inner cavity of the main valve seat to generate leakage; in addition, when the multi-way valve with the gas auxiliary seal is maintained, each main valve and each gas auxiliary valve can be opened, high-pressure steam or diesel oil is introduced into the valve body through the sealing gas connecting flange of each gas auxiliary valve to flush the main valve and the valve body, and sediments in the multi-way valve are removed completely; the gas-assisted valve seat and the gas-assisted valve core are of replaceable structures;

the outer side of the gas-assisted valve seat is provided with a gas-assisted valve seat fixing ring, the outer side of the gas-assisted valve seat fixing ring is provided with a gas-assisted valve cover, and the gas-assisted valve cover is fixedly connected with the valve body; the gas-assisted valve core fixes the gas-assisted valve rod, and a gas-assisted valve packing is arranged between the gas-assisted valve rod and the gas-assisted valve cover and is tightly pressed by a gas-assisted valve packing gland; the gas-assisted valve rod seat is fixedly connected with the valve body through a gas-assisted valve supporting rod; the gas-assisted valve screw is fixedly connected with the gas-assisted valve rod through a gas-assisted valve rod clamp; a screw nut B is rotatably arranged on the gas-assisted valve rod seat, the screw nut B is meshed with the gas-assisted valve screw rod, and the gas-assisted valve screw rod is driven to do linear motion by rotating the screw nut B; and a sealing gas connecting flange is fixedly arranged on the gas-assisted valve cover and is provided with a gas passage communicated with the cavity of the gas-assisted valve seat.

Further, the gas-assisted valve screw rod is fixedly provided with a gas-assisted valve rod guide plate, the gas-assisted valve rod guide plate is rectangular plate-shaped, two ends of the gas-assisted valve rod guide plate are provided with anti-rotation clamping grooves, and the anti-rotation clamping grooves are slidably clamped on the gas-assisted valve support rod.

Further, a sealing gasket is arranged between the end surface of the inner side of the air auxiliary valve seat and the end surface of the cavity of the air auxiliary valve seat; a sealing gasket is arranged between the end face of the gas-assisted valve cover and the valve body.

Due to the adoption of the technical scheme, the invention has the following beneficial effects: the invention discloses a multi-way valve with gas-assisted sealing, which comprises a valve body, a main valve and a gas-assisted valve; the valve body is in a polygonal thick plate shape, a main runner is arranged on the lower end face, a plurality of sub-runners are arranged on the upper end face, and the main runner is communicated with the sub-runners; the main valves are arranged on the side surface of the valve body, the number of the main valves is equal to that of the branch runners, and each main valve controls the on-off of the corresponding branch runner; the gas auxiliary valves are arranged on the lower end face of the valve body, the number of the gas auxiliary valves is equal to that of the main valves, and each gas auxiliary valve controls the on-off of a sealing gas source of the corresponding main valve; the novel multi-way valve with the gas-assisted seal can replace the function realized by connecting a plurality of independent valves and a plurality of three-way pipes, so that the number of the valves and the three-way pipes in engineering construction can be greatly reduced, the engineering cost and the construction cost are greatly reduced, and the actual operation and maintenance workload and cost are also reduced; in addition, the gas-assisted sealing function of the valve greatly improves the solid diseases of running, overflowing, dripping and leaking in the petrochemical industry, improves the production environment and also greatly ensures the production safety.

Drawings

FIG. 1 is a first schematic view of a multi-way valve with an air-assisted seal;

FIG. 2 is a schematic view of a multi-way valve with an air-assisted seal;

fig. 3 is a schematic view of the main valve stem guide assembly.

In the figure: 1. a valve body; 1.1, a main flow channel; 1.2, a shunt channel; 2. a main valve; 2.1, a main valve seat; 2.2, fixing a main valve seat ring; 2.3, a main valve cover; 2.4, a main valve packing; 2.5, a main valve packing gland; 2.6, main valve core; 2.6.1, main valve stem; 2.7, main valve stem seat; 2.8, a main valve support rod; 2.9, main valve screw; 2.10, clamping the main valve rod; 2.11, main valve stem guide plate; 3. a gas-assisted valve; 3.1, an air auxiliary valve seat; 3.2, fixing a gas auxiliary valve seat ring; 3.3, a gas-assisted valve cover; 3.3.1, sealing the gas connecting flange; 3.4, a gas auxiliary valve packing; 3.5, pressing a packing of the gas auxiliary valve; 3.6, a gas auxiliary valve core; 3.6.1, a gas-assisted valve rod; 3.7, a gas-assisted valve rod seat; 3.8, supporting rods of the gas auxiliary valves; 3.9, a gas auxiliary valve screw rod; 3.10, clamping the air auxiliary valve rod; 3.11, a gas-assisted valve rod guide plate.

Detailed Description

The present invention will be explained in detail by the following examples, which are disclosed for the purpose of protecting all technical improvements within the scope of the present invention.

A three-way valve with gas-assisted sealing comprises a valve body 1, a main valve 2 and a gas-assisted valve 3; the valve body 1 is in a rectangular thick plate shape, a main runner 1.1 is arranged on the lower end surface, two sub-runners 1.2 are arranged on the upper end surface, and the main runner 1.1 is communicated with the two sub-runners 1.2; two side surfaces of the valve body 1 are provided with a main valve seat cavity corresponding to the branch runners 1.2, and the other two side surfaces of the valve body 1 are provided with an air auxiliary valve seat cavity corresponding to the main valve seat cavity; two main valves 2 are arranged, and the main valves 2 are arranged on the side surface of the valve body 1 provided with the main valve seat cavity; the number of the gas auxiliary valves 3 is two, and the gas auxiliary valves 3 are arranged on the side face, provided with the gas auxiliary valve seat cavity, of the valve body 1;

the main valve 2 comprises a main valve seat 2.1, a main valve core 2.6, a main valve rod seat 2.7 and a main valve screw rod 2.9; the main valve seat 2.1 is annular and is fixedly arranged in a main valve seat cavity of the valve body 1, and the annular wall of the main valve seat 2.1 is provided with a through hole communicated with the sub-runner 1.2; the main valve core 2.6 is arranged in an inner cavity of the main valve seat 2.1 in a sliding manner, slides along the axis of the inner cavity of the main valve seat 2.1, and opens or closes the communication between the corresponding sub-runner 1.2 and the main runner 1.1; a valve seat fixing ring 2.2 is arranged on the outer side of the main valve seat 2.1, a main valve cover 2.3 is arranged on the outer side of the valve seat fixing ring 2.2, and the main valve cover 2.3 is fixedly connected with the valve body 1; the main valve core 2.6 is fixedly connected with a main valve rod 2.6.1, and a main valve packing 2.4 is arranged between the main valve rod 2.6.1 and the main valve cover 2.3 and is pressed tightly by a main valve packing pressing cover 2.5; the main valve rod seat 2.7 is fixedly connected with the valve body 1 through a main valve supporting rod 2.8; the main valve screw 2.9 is fixedly connected with the main valve rod 2.6.1 through a main valve rod clamp 2.10; a lead screw nut A is rotatably arranged on the main valve rod seat 2.7, the lead screw nut A is meshed with the main valve screw rod 2.9, and the main valve screw rod 2.9 is driven to do linear motion by rotating the lead screw nut A; a main valve rod guide plate 2.11 is fixedly arranged on the main valve screw rod 2.9, the main valve rod guide plate 2.11 is rectangular plate-shaped, two ends of the main valve rod guide plate are provided with anti-rotation clamping grooves, and the anti-rotation clamping grooves are clamped on the main valve support rod 2.8 in a sliding manner; a sealing gasket is arranged between the end surface of the inner side of the main valve seat 2.1 and the end surface of the main valve seat cavity; a sealing gasket is arranged between the end surface of the main valve cover 2.3 and the valve body 1;

the gas-assisted valve 3 comprises a gas-assisted valve seat 3.1, a gas-assisted valve core 3.6, a gas-assisted valve rod seat 3.7 and a gas-assisted valve screw rod 3.9; the gas auxiliary valve seat 3.1 is annular and is fixedly arranged in a gas auxiliary valve seat cavity of the valve body 1, and the inner cavity is communicated with the inner cavity of the corresponding main valve seat 2.1; the gas auxiliary valve core 3.6 is arranged in the inner cavity of the gas auxiliary valve seat 3.1 in a sliding manner, slides along the axis of the inner cavity of the gas auxiliary valve seat 3.1, and opens or closes the communication between the cavity of the corresponding auxiliary valve seat 3.1 and a sealed gas source; an air-assisted valve seat fixing ring 3.2 is arranged on the outer side of the air-assisted valve seat 3.1, an air-assisted valve cover 3.3 is arranged on the outer side of the air-assisted valve seat fixing ring 3.2, and the air-assisted valve cover 3.3 is fixedly connected with the valve body 1; the gas-assisted valve core 3.6 fixes the gas-assisted valve rod 3.6.1, and a gas-assisted valve packing 3.4 is arranged between the gas-assisted valve rod 3.6.1 and the gas-assisted valve cover 3.3 and is tightly pressed by a gas-assisted valve packing pressing cover 3.5; the gas-assisted valve rod seat 3.7 is fixedly connected with the valve body 1 through a gas-assisted valve supporting rod 3.8; the gas auxiliary valve screw 3.9 is fixedly connected with a gas auxiliary valve rod 3.6.1 through a gas auxiliary valve rod clamp 3.10; a screw nut B is rotatably arranged on the air-assisted valve rod seat 3.7 and is meshed with the air-assisted valve screw rod 3.9, and the air-assisted valve screw rod 3.9 is driven to do linear motion by rotating the screw nut B; a sealing gas connecting flange 3.3.1 is fixedly arranged on the gas auxiliary valve cover 3.3, and the sealing gas connecting flange 3.3.1 is provided with a gas passage communicated with the cavity of the gas auxiliary valve seat 3.1; an air-assisted valve rod guide plate 3.11 is fixedly arranged on the air-assisted valve screw rod 3.9, the air-assisted valve rod guide plate 3.11 is rectangular plate-shaped, and anti-rotation clamping grooves are arranged at two ends and are clamped on the air-assisted valve support rod 3.8 in a sliding manner; a sealing gasket is arranged between the end surface of the inner side of the air auxiliary valve seat 3.1 and the end surface of the cavity of the air auxiliary valve seat; a sealing gasket is arranged between the end surface of the gas-assisted valve cover 3.3 and the valve body 1.

A six-way valve with gas-assisted sealing comprises a valve body 1, a main valve 2 and a gas-assisted valve 3; the valve body 1 is in a pentagonal thick plate shape, a main runner 1.1 is arranged on the lower end face, five sub-runners 1.2 are arranged on the upper end face, and the main runner 1.1 is communicated with the five sub-runners 1.2; the side surface of the valve body 1 is provided with a main valve seat cavity corresponding to the branch runner 1.2; the lower end surface of the valve body 1 is provided with an air auxiliary valve seat cavity corresponding to the main valve seat cavity;

five main valves 2 are arranged and fixedly arranged on the side surface of the valve body 1; the number of the gas auxiliary valves 3 is five, and the gas auxiliary valves are fixedly arranged on the lower end face of the valve body 1.

The present invention is not described in detail in the prior art.