Double-gate-plate flat gate valve for tank root

Abstract

The utility model relates to the technical field of flat gate valves, and discloses a double-gate flat gate valve for a tank root, which comprises a valve body, an input port and an output port, a lubricating device is arranged at the center of the upper end face of a hand wheel, a connecting plate is arranged at the center of the lower end face of a valve rod, and a plurality of second strong springs are arranged at the centers of two side walls of the connecting plate in a rectangular manner. A first valve plate is fixedly connected to the ends, close to one side, of the multiple second strong springs, a second valve plate is fixedly connected to the ends, close to the other side, of the multiple second strong springs, and valve seats are arranged at the input end of the input port and the output end of the output port correspondingly. According to the utility model, continuous pressure is applied when the first valve plate and the second valve plate are closed through the second strong spring and the supporting rod, so that the first valve plate and the second valve plate are tightly pressed to the sealing surface of the valve seat, and the first valve plate and the second valve plate are in tight contact with the valve seat, thereby realizing a reliable sealing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of flat gate valves, in particular to a double-disc flat gate valve for tank roots. Background Art

[0002] In the existing fluid control system, the valve at the root of the tank needs to have good sealing performance and corrosion resistance to ensure the safe and stable operation of the system. The double-disc flat gate valve is a valve used to control the flow of fluid. It has two parallel gates that can be fully opened or closed in the pipeline. It is suitable for occasions that require high sealing performance.

[0003] When the double-disc flat gate valve for tank roots is used today, after the double-disc flat gate valve is closed, the pressure on the sealing surface is poor, making it difficult for the valve plate to maintain close contact with the valve seat, which easily leads to leakage risk, thereby reducing the sealing effect. During the closing process of the double-disc flat gate valve, the fluid flow and impact force are large, making the closing operation more difficult and easily reducing the service life of the valve plate. Therefore, those skilled in the art have provided a double-disc flat gate valve for tank roots to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the present invention is to solve the shortcomings of the prior art. The proposed double-disc flat gate valve for tank roots satisfies the requirement of applying continuous pressure to the first and second valve plates when closing, so that the first and second valve plates are tightly pressed against the sealing surface of the valve seat, and the first and second valve plates are kept in close contact with the valve seat, thereby achieving a reliable sealing effect. Then, the cooperation between the buffer device and the balancing hole satisfies the requirement of slowly reducing the fluid flow rate during the closing process of the first and second valve plates, reducing pressure and impact force, thereby reducing the difficulty of closing the valve body and prolonging the service life of the equipment, and allowing fluid to flow on both sides of the first and second valve plates, reducing the pressure difference on both sides when closing, thereby improving the stability and safety of the system. Finally, the provision of the lubricating device satisfies the requirement of lubricating the valve stem surface, and facilitates the staff to quickly and conveniently output lubricating oil to lubricate it in real time during use, avoiding the risk of the valve stem being stuck due to rotation for too long, thereby improving convenience and ensuring smooth operation.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-disc flat gate valve for tank roots, comprising a valve body, an input port and an output port, wherein the input port is arranged at the lower center of one side of the valve body, and the output port is arranged at the lower center of the other side of the valve body, a valve stem is arranged at the center of the inner part of the valve body, a support frame is arranged at the center of the upper end face of the valve body, a handwheel is arranged at the center of the upper end face of the valve stem, an oil-absorbing cotton is sleeved at the lower center of the outer side of the valve stem, a lubricating device is arranged at the center of the upper end face of the handwheel, a connecting plate is arranged at the center of the lower end face of the valve stem, and the centers of the two side walls of the connecting plate are A plurality of second strong springs are arranged in a rectangular shape, and a first valve plate is fixedly connected to the ends of the plurality of second strong springs on one side, and a second valve plate is fixedly connected to the ends of the plurality of second strong springs on the other side. Four balancing holes are arranged in a rectangular shape at the center of one side of the first valve plate and the second valve plate. Support rods are provided at the front and rear of the center of both sides of the connecting plate, and rubber pads are provided at the ends of the four support rods. Valve seats are provided at the input end of the input port and the output end of the output port, a sealing surface is provided at the center of a side wall between the two valve seats, and a buffer device is provided at the center of the upper end surface of the input port;

[0006] Through the above technical solution, through the coordinated use of the second strong spring and the support rod, it is possible to apply continuous pressure when the first valve plate and the second valve plate are closed, so that the first valve plate and the second valve plate are tightly pressed against the sealing surface of the valve seat, and the first valve plate and the second valve plate can maintain close contact with the valve seat, thereby achieving a reliable sealing effect.

[0007] Furthermore, the lubricating device includes an oil storage tank, an oiling nozzle, a pressing block, a connecting rod and two circulation channels, the oil storage tank is arranged at the center of the upper end surface of the handwheel, the oiling nozzle is arranged at one side of the center of the upper end surface of the oil storage tank, the pressing block is arranged at the center of the upper end surface of the oil storage tank, and passes through the upper end surface of the oil storage tank to the upper inner wall of the oil storage tank, the connecting rod is arranged at the center of the lower end surface of the pressing block, the two circulation channels are respectively arranged at both sides of the inner center of the handwheel, the input ends of the two circulation channels respectively pass through the handwheel to the upper end surface of the handwheel, and the output ends respectively pass through the handwheel to the two sides of the center of the lower end surface of the handwheel;

[0008] Through the above technical solution, the lubricating oil is transported to the oil storage tank through the oil filling nozzle for storage, making it convenient for the staff to quickly output the lubricating oil.

[0009] Furthermore, a through groove is provided at the center of the lower inner wall of the oil storage tank, a sealing block is sleeved at the center of the inner part of the through groove and is fixedly connected to the connecting rod, pistons are provided at the centers of both sides of the sealing block and the pressing block, a first strong spring is provided at the center of the lower end surface of the sealing block, and one end of the first strong spring is fixedly connected to the two circulation channels;

[0010] Through the above technical solution, by pressing the pressing block, the connecting rod drives the sealing block to move, and then the lubricating oil is transported to the inside of the circulation channel through the through groove, and then transported to the outside of the valve stem through the circulation channel, so that the lubrication effect on the valve stem surface is satisfied, and it is convenient for the staff to quickly and conveniently output lubricating oil to lubricate it in real time during use, avoiding the risk of the valve stem being stuck due to rotation for too long, thereby improving convenience and ensuring smooth operation, and then through the elastic performance of the first strong spring, the pressing block can rebound to the through groove when it is released, and then sealed by the piston to avoid leakage.

[0011] Furthermore, the buffer device includes a control button, an air pump, a connecting tube and an air bag, wherein the control button is arranged at one side of the center of the upper end surface of the input port, the air pump is arranged at the center of the upper end surface of the input port, the connecting tube is arranged at the output end of the air pump, and the input end passes through the upper end surface of the input port and passes into the interior of the input port, and the air bag is arranged at the output end of the connecting tube;

[0012] Through the above technical solution, the air pump is started by controlling the control button, and then air is output to the inside of the airbag through the connecting pipe, so as to satisfy the expansion of the airbag and to slowly reduce the fluid flow during the closing process of the first valve plate and the second valve plate, thereby reducing the pressure and impact force, thereby reducing the difficulty of closing the valve body and increasing the service life of the equipment.

[0013] Furthermore, the material of the airbag is nitrile rubber;

[0014] Through the above technical solution, the airbag is made of nitrile rubber, which satisfies the requirements of having good wear resistance and high pressure resistance, and avoids damage to the airbag caused by the impact and pressure of the fluid flow rate.

[0015] Furthermore, the valve stem is threadedly connected to the support frame and the valve body respectively, and is fixedly connected to the handwheel;

[0016] Through the above technical solution, the valve stem is rotated by rotating the hand wheel, so that it can drive the opening and closing of the first valve plate and the second valve plate.

[0017] Furthermore, the upper and lower end surfaces of the first valve plate and the second valve plate are respectively inclined, and the upper and lower end surfaces of the two valve seats are respectively inclined;

[0018] Through the above technical solution, the upper and lower end surfaces of the first valve plate and the second valve plate are inclined, and the upper and lower end surfaces of the valve seat are inclined, so that the first valve plate and the second valve plate can move smoothly, avoiding jamming and affecting the normal operation of the equipment.

[0019] The utility model has the following beneficial effects:

[0020] 1. In the utility model, when the double-disc flat gate valve is used at the root of a tank, the cooperation between the second strong spring and the support rod satisfies the requirement of applying continuous pressure when the first valve disc and the second valve disc are closed, so that the first valve disc and the second valve disc are tightly pressed against the sealing surface of the valve seat, and the first valve disc and the second valve disc can maintain close contact with the valve seat, thereby achieving a reliable sealing effect.

[0021] 2. In the utility model, the buffer device and the balance hole are used in conjunction with each other to slowly reduce the fluid flow during the closing process of the first valve plate and the second valve plate, reduce the pressure and impact force, thereby reducing the difficulty of closing the valve body and increasing the service life of the equipment. It can also allow the fluid to flow on both sides of the first valve plate and the second valve plate, reducing the pressure difference on both sides when closing, thereby improving the stability and safety of the system.

[0022] 3. In the present invention, the lubrication device is provided to meet the lubrication effect on the valve stem surface, and it is convenient for the staff to quickly and conveniently output lubricating oil to lubricate it in real time during use, avoiding the risk of the valve stem being stuck due to rotation for too long, thereby improving convenience and ensuring smooth operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional diagram of the double-disc flat gate valve for tank root proposed in the utility model;

[0024] Figure 2 This is a front cross-sectional view of the double-disc flat gate valve for tank root proposed by the utility model;

[0025] Figure 3 for Figure 2 A magnified schematic diagram of point A in the middle;

[0026] Figure 4 for Figure 2 Enlarged schematic diagram of point A in the middle.

[0027] Legend:

[0028] 1. Valve body; 2. Input port; 3. Output port; 4. Valve stem; 5. Support frame; 6. Handwheel; 7. Oil-absorbing cotton; 8. Lubrication device; 801. Oil storage tank; 802. Oil nozzle; 803. Press block; 804. Connecting rod; 805. Circulation channel; 806. Through groove; 807. Sealing block; 808. Piston; 809. First strong spring; 9. Connecting plate; 10. Second strong spring; 11. First valve plate; 12. Second valve plate; 13. Balancing hole; 14. Support rod; 15. Rubber pad; 16. Valve seat; 17. Sealing surface; 18. Buffer device; 1801. Control button; 1802. Air pump; 1803. Connecting pipe; 1804. Air bag. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Reference Figure 1-4 The utility model provides an embodiment of a double-disc flat gate valve for a tank root, comprising a valve body 1, an input port 2 and an output port 3. The input port 2 is arranged at the lower center of one side of the valve body 1, and the output port 3 is arranged at the lower center of the other side of the valve body 1. A valve stem 4 is provided at the center of the inner part of the valve body 1, a support frame 5 is provided at the center of the upper end surface of the valve body 1, a handwheel 6 is provided at the center of the upper end surface of the valve stem 4, an oil-absorbing cotton 7 is sleeved at the lower center of the outer side of the valve stem 4, and a lubricating device 8 is provided at the center of the upper end surface of the handwheel 6. Through the setting of the lubricating device 8, it satisfies the lubrication effect of the surface of the valve stem 4, and is convenient for the staff to quickly and conveniently output lubricating oil to lubricate it in real time during use, avoiding the risk of the valve stem 4 being stuck due to rotation for too long, thereby improving convenience and ensuring smooth operation.

[0031] A connecting plate 9 is provided at the center of the lower end surface of the valve stem 4, and a plurality of second strong springs 10 are arranged in a rectangular shape at the centers of the two side walls of the connecting plate 9. The first valve plate 11 is fixedly connected to the ends of the plurality of second strong springs 10 on one side, and the second valve plate 12 is fixedly connected to the ends of the plurality of second strong springs 10 on the other side. Four balancing holes 13 are arranged in a rectangular shape at the centers of one side of the first valve plate 11 and the second valve plate 12. Support rods 14 are provided at the front and rear centers of both sides of the connecting plate 9, and rubber pads 15 are provided at the ends of the four support rods 14. Valve seats 16 are provided at the input end of the input port 2 and the output end of the output port 3.

[0032] A sealing surface 17 is provided at the center of one side wall between the two valve seats 16. Through the cooperation between the second strong spring 10 and the support rod 14, it satisfies the requirement of applying continuous pressure when the first valve plate 11 and the second valve plate 12 are closed, so that the first valve plate 11 and the second valve plate 12 are tightly pressed against the sealing surface 17 of the valve seat 16, and the first valve plate 11 and the second valve plate 12 can maintain close contact with the valve seat 16, thereby achieving a reliable sealing effect. A buffer device 18 is provided at the center of the upper end surface of the input port 2. Through the cooperation between the buffer device 18 and the balancing hole 13, it satisfies the requirement of slowly reducing the fluid flow rate during the closing process of the first valve plate 11 and the second valve plate 12, reducing the pressure and impact force, thereby reducing the difficulty of closing the valve body 1 and improving the service life of the equipment, and allowing the fluid to flow on both sides of the first valve plate 11 and the second valve plate 12, reducing the pressure difference on both sides when closing, thereby improving the stability and safety of the system.

[0033] The lubricating device 8 includes an oil storage tank 801, an oiling nozzle 802, a pressing block 803, a connecting rod 804 and two circulation channels 805. The oil storage tank 801 is arranged at the center of the upper end surface of the handwheel 6, the oiling nozzle 802 is arranged at one side of the center of the upper end surface of the oil storage tank 801, the pressing block 803 is arranged at the center of the upper end surface of the oil storage tank 801, and passes through the upper end surface of the oil storage tank 801 to the upper inner wall of the oil storage tank 801, the connecting rod 804 is arranged at the center of the lower end surface of the pressing block 803, and the two circulation channels 805 are respectively arranged at both sides of the inner center of the handwheel 6. The input ends of the two circulation channels 805 respectively pass through the handwheel 6 to the upper end surface of the handwheel 6, and the output ends respectively pass through the handwheel 6 to the two sides of the center of the lower end surface of the handwheel 6. The lubricating oil is transported to the inside of the oil storage tank 801 for storage through the oiling nozzle 802, which makes it convenient for the staff to quickly output the lubricating oil.

[0034] A through groove 806 is provided at the center of the lower inner wall of the oil storage tank 801, and a sealing block 807 is provided at the center of the inner center of the through groove 806, and is fixedly connected to the connecting rod 804. Pistons 808 are provided at the centers of both sides of the sealing block 807 and the pressing block 803. A first strong spring 809 is provided at the center of the lower end surface of the sealing block 807. One end of the first strong spring 809 is fixedly connected to the two circulation channels 805. By pressing the pressing block 803, it drives the connecting rod 804 to drive the sealing block 807 to move, and then lubricates it through the through groove 806. The oil is transported to the inside of the circulation channel 805, and then transported to the outside of the valve stem 4 through the circulation channel 805, so that it satisfies the lubrication effect on the surface of the valve stem 4, and is convenient for the staff to quickly and conveniently output lubricating oil to lubricate it in real time during use, avoiding the risk of the valve stem 4 being stuck due to rotation for too long, thereby improving convenience and ensuring smooth operation. The elastic performance of the first strong spring 809 allows the pressing block 803 to rebound to the through groove 806 when it is released, and then is sealed by the piston 808 to avoid leakage.

[0035] The buffer device 18 includes a control button 1801, an air pump 1802, a connecting tube 1803 and an air bag 1804. The control button 1801 is arranged at one side of the center of the upper end surface of the input port 2, the air pump 1802 is arranged at the center of the upper end surface of the input port 2, the connecting tube 1803 is arranged at the output end of the air pump 1802, and the input end passes through the upper end surface of the input port 2 and passes to the inside of the input port 2. The air bag 1804 is arranged at the output end of the connecting tube 1803. The air pump 1802 is started by the control button 1801, and then the air bag 1804 is connected to the connecting tube 1803. 03 Air is output to the inside of the airbag 1804 to satisfy the expansion of the airbag 1804, so that the fluid flow is slowly reduced during the closing process of the first valve plate 11 and the second valve plate 12, reducing the pressure and impact force, thereby reducing the difficulty of closing the valve body 1 and increasing the service life of the equipment. The material of the airbag 1804 is nitrile rubber. The airbag 1804 is made of nitrile rubber, so that it has good wear resistance and high pressure resistance, avoiding the impact of fluid flow rate and pressure that cause damage to the airbag 1804.

[0036] The valve stem 4 is threadedly connected to the support frame 5 and the valve body 1 respectively, and is fixedly connected to the handwheel 6. The valve stem 4 is rotated by rotating the handwheel 6, so that it can drive the opening and closing of the first valve plate 11 and the second valve plate 12. The upper and lower end surfaces of the first valve plate 11 and the second valve plate 12 are tilted respectively, and the upper and lower end surfaces of the two valve seats 16 are tilted respectively. The upper and lower end surfaces of the first valve plate 11 and the second valve plate 12 are tilted, and the upper and lower end surfaces of the valve seat 16 are tilted, so that the first valve plate 11 and the second valve plate 12 can move smoothly, avoiding jamming and affecting the normal operation of the equipment.

[0037] Working principle: When using a double-disc flat gate valve at the root of a tank, the valve stem 4 is rotated by rotating the handwheel 6, so that it can drive the opening and closing of the first valve plate 11 and the second valve plate 12, and then the upper and lower end surfaces of the first valve plate 11 and the second valve plate 12 are inclined, and the upper and lower end surfaces of the valve seat 16 are inclined, so that the first valve plate 11 and the second valve plate 12 can move smoothly, avoiding jamming and affecting the normal operation of the equipment, and then the cooperation between the second strong spring 10 and the support rod 14 can satisfy the requirement of applying continuous pressure when the first valve plate 11 and the second valve plate 12 are closed, so that the first valve plate 11 and the second valve plate 12 are tightly pressed against the sealing surface 17 of the valve seat 16, and can keep the first valve plate 11 and the second valve plate 12 in close contact with the valve seat 16, thereby achieving a reliable sealing effect.

[0038] Then the lubricating oil is transported to the oil storage tank 801 for storage through the oil filling nozzle 802, making it convenient for the staff to quickly output the lubricating oil to it, and then by pressing the pressing block 803, it drives the connecting rod 804 to drive the sealing block 807 to move, and then the lubricating oil is transported to the inside of the circulation channel 805 through the through groove 806, and then it is transported to the outside of the valve stem 4 through the circulation channel 805, so that it satisfies the lubrication effect on the surface of the valve stem 4, and is convenient for the staff to quickly and conveniently output the lubricating oil to lubricate it in real time during use, avoiding the risk of the valve stem 4 being stuck due to rotation for too long, thereby improving convenience and ensuring smooth operation, and then through the elastic performance of the first strong spring 809, the pressing block 803 is released and can rebound to the through groove 806, and then sealed by the piston 808 to avoid leakage.

[0039] Finally, the air pump 1802 is started by controlling the control button 1801, and then air is output to the inside of the airbag 1804 through the connecting pipe 1803, so that the airbag 1804 can expand, and the fluid flow can be slowly reduced during the closing process of the first valve plate 11 and the second valve plate 12, reducing the pressure and impact force, thereby reducing the difficulty of operating the closing valve body 1 and improving the service life of the equipment. The airbag 1804 is made of nitrile rubber, so that it can have good wear resistance and high pressure resistance, avoiding the impact and pressure of the fluid flow rate that may cause damage to the airbag 1804, and then through the balance hole 13, it can allow the fluid to flow on both sides of the first valve plate 11 and the second valve plate 12, reducing the pressure difference on both sides when closing, thereby improving the stability and safety of the system.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A double-disc flat gate valve for tank root, comprising a valve body (1), an input port (2) and an output port (3), wherein the input port (2) is arranged at the lower center of one side of the valve body (1), and the output port (3) is arranged at the lower center of the other side of the valve body (1), and is characterized in that: A valve stem (4) is provided at the center of the inner portion of the valve body (1), a support frame (5) is provided at the center of the upper end face of the valve body (1), a hand wheel (6) is provided at the center of the upper end face of the valve stem (4), an oil-absorbing cotton (7) is sleeved at the lower center of the outer side of the valve stem (4), a lubricating device (8) is provided at the center of the upper end face of the hand wheel (6), a connecting plate (9) is provided at the center of the lower end face of the valve stem (4), a plurality of second strong springs (10) are arranged in a rectangular shape at the center of both side walls of the connecting plate (9), a first valve plate (11) is fixedly connected to the ends of the plurality of second strong springs (10) on one side, and a plurality of the second strong springs (10) on the other side are fixedly connected to the ends of the first valve plate (11). The second valve plate (12) is fixedly connected to the end of the second strong spring (10), and four balancing holes (13) are arranged in a rectangular shape at the center of one side of the first valve plate (11) and the second valve plate (12). Support rods (14) are provided at the front and rear centers of both sides of the connecting plate (9), and rubber pads (15) are provided at the ends of the four support rods (14). Valve seats (16) are provided at the input end of the input port (2) and the output end of the output port (3). A sealing surface (17) is provided at the center of a side wall between the two valve seats (16), and a buffer device (18) is provided at the center of the upper end face of the input port (2).

2. The double-disc flat gate valve for tank root according to claim 1, characterized in that: The lubricating device (8) comprises an oil storage tank (801), an oiling nozzle (802), a pressing block (803), a connecting rod (804) and two circulation channels (805). The oil storage tank (801) is arranged at the center of the upper end surface of the hand wheel (6). The oiling nozzle (802) is arranged at one side of the center of the upper end surface of the oil storage tank (801). The pressing block (803) is arranged at the center of the upper end surface of the oil storage tank (801) and penetrates the oil storage tank. The upper end face of (801) is connected to the upper inner wall of the oil storage tank (801), the connecting rod (804) is arranged at the center of the lower end face of the pressing block (803), and the two circulation channels (805) are respectively arranged at both sides of the inner center of the handwheel (6). The input ends of the two circulation channels (805) respectively pass through the handwheel (6) and pass to the upper end face of the handwheel (6), and the output ends respectively pass through the handwheel (6) and pass to both sides of the center of the lower end face of the handwheel (6).

3. The double-disc flat gate valve for tank root according to claim 2, characterized in that: A through groove (806) is provided at the center of the lower inner wall of the oil storage tank (801), a sealing block (807) is sleeved at the center inside the through groove (806), and is fixedly connected to the connecting rod (804), pistons (808) are provided at the centers of both sides of the sealing block (807) and the pressing block (803), a first strong spring (809) is provided at the center of the lower end surface of the sealing block (807), and one end of the first strong spring (809) is fixedly connected to the two circulation channels (805).

4. The double-disc flat gate valve for tank root according to claim 1, characterized in that: The buffer device (18) comprises a control button (1801), an air pump (1802), a connecting tube (1803) and an air bag (1804); the control button (1801) is arranged at one side of the center of the upper end surface of the input port (2); the air pump (1802) is arranged at the center of the upper end surface of the input port (2); the connecting tube (1803) is arranged at the output end of the air pump (1802), and the input end passes through the upper end surface of the input port (2) and reaches the interior of the input port (2); and the air bag (1804) is arranged at the output end of the connecting tube (1803).

5. The double-disc flat gate valve for tank root according to claim 4, characterized in that: The material of the airbag (1804) is nitrile rubber.

6. The double-disc flat gate valve for tank root according to claim 1, characterized in that: The valve stem (4) is respectively threadedly sleeved with the support frame (5) and the valve body (1), and is fixedly connected to the hand wheel (6).

7. The double-disc flat gate valve for tank root according to claim 1, characterized in that: The upper and lower end surfaces of the first valve plate (11) and the second valve plate (12) are respectively inclined, and the upper and lower end surfaces of the two valve seats (16) are respectively inclined.

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