High-temperature-resistant quick-closing type stop valve

Abstract

The high-temperature-resistant quick-closing type stop valve comprises a liquid passing pipe, a connecting cylinder is arranged at the top of the liquid passing pipe, a piston rod is slidably connected into the connecting cylinder, a sealing ball is arranged at the bottom of the piston rod, sealing assemblies are arranged on the two sides of the sealing ball, and through holes are symmetrically formed in the tops of the two sides of the sealing ball; an air duct B is arranged in the piston rod, and the air duct B is communicated with the sealing ball; through cooperation of the mounting frame, the supporting rods and the connecting frame, when the valve needs to be closed emergently, the piston rod and the sealing ball can move downwards quickly by pulling the two supporting rods to turn over, and then the interior of the liquid passing pipe is blocked; and the sealing ball seals the liquid passing opening in the liquid passing pipe, so that the closing effect of the stop valve is effectively improved, and accidents caused by too slow closing of the stop valve are prevented.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a high-temperature resistant quick-closing stop valve. Background Art

[0002] The stop valve, also known as the gate valve, is a forced sealing valve. Therefore, when the valve is closed, pressure must be applied to the valve disc to force the sealing surface to prevent leakage. When the medium enters the valve from under the valve disc, the resistance that the operating force needs to overcome is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the diameter of the valve stem must be larger, otherwise the valve stem will bend. The stop valve is also required during the circulation of high-temperature solutions.

[0003] The existing stop valve has the following inconveniences:

[0004] When closing a stop valve, the valve cap on the stop valve is usually rotated to close the valve. When the stop valve is flowing through a high-temperature liquid, if the high-temperature solution leaks, using the rotating valve cap to close the valve will delay time and easily lead to danger, thereby reducing the safety factor of the valve and hindering the circulation of the high-temperature liquid. When the stop valve passes through a high-temperature liquid for a long time, the valve will also experience accelerated oxidation due to the influence of the high temperature, and the sealing plug inside it will undergo a certain degree of oxidation, and its sealing effect will deteriorate. When the valve is closed, some of the solution inside it will still flow out from the inside of the valve, thereby affecting the sealing effect of the valve. Since the situation inside the valve cannot be observed by the staff, the sealing effect of the valve is deteriorated and it is not easy for the staff to detect it. Summary of the invention

[0005] The purpose of the present invention is to provide a high temperature resistant quick closing stop valve to solve the related problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: comprising a liquid passing pipe, a connecting tube is provided at the top of the liquid passing pipe, a piston rod is slidably connected inside the connecting tube, a sealing ball is provided at the bottom of the piston rod, sealing assemblies are provided on both sides of the sealing ball, through holes are symmetrically provided at the tops of both sides of the sealing ball, an air passage B is provided inside the piston rod, and the air passage B is communicated with the sealing ball, a piston plate is slidably connected inside the air passage B, a push rod is provided at the bottom of the piston plate, and a floating plate is provided at the bottom of the push rod, mounting frames are symmetrically provided on both sides of the connecting tube, a support rod is hinged on the top of the mounting frame, a spring A is provided on the outside of the piston rod, a valve cap is provided at the top of the piston rod, a pressure gauge is provided on the top of the valve cap, and connecting frames are symmetrically provided on both sides of the bottom of the valve cap.

[0007] Preferably, the sealing assembly consists of a spring B, a baffle and a fixing ring, baffles are symmetrically hinged on both sides of the sealing ball, fixing rings are symmetrically provided at the bottom of both sides of the piston rod, a spring B is provided on the outside of the fixing ring, and the fixing ring is connected to the sealing ball.

[0008] Preferably, flanges are provided on the top of the liquid passage and the outer side of the connecting tube, and the two sets of flanges are fixedly connected by bolts.

[0009] Preferably, the fixing ring is made of an arc-shaped structure, and the fixing ring is located inside the baffle.

[0010] Preferably, a sealing plate is provided on one side of the baffle, and the sealing plate is made of acrylic ester rubber.

[0011] Preferably, the pressure gauge is connected to the valve cap via fixing bolts, and reinforcing rods are symmetrically provided on both sides of the pressure gauge.

[0012] Preferably, a liquid through hole is provided inside the liquid through tube, and the diameter of the sealing ball is larger than the diameter of the liquid through hole.

[0013] Preferably, a connecting ring is provided on the top of the outer side of the connecting tube, and the mounting frame is connected to the connecting ring by welding.

[0014] Preferably, an air vent A is provided at the top of the interior of the piston rod, and the air vent A is communicated with the air vent B.

[0015] Compared with the prior art, the present invention provides a high temperature resistant quick closing stop valve, which has the following beneficial effects:

[0016] 1. The present invention cooperates with the mounting frame, the support rod and the connecting frame. When the valve needs to be closed urgently, the two groups of support rods can be pulled to flip, so that the piston rod and the sealing ball can be quickly moved down, thereby sealing the inside of the liquid pipe, and the sealing ball can seal the liquid port inside the liquid pipe under the elastic action of the spring A, thereby effectively improving the effect of closing the stop valve and preventing the stop valve from closing too slowly to cause an accident.

[0017] 2. In the present invention, through the cooperation of spring B, baffle, floating plate, push rod, through hole, fixing ring, air duct B and air duct A, when the sealing ball is severely corroded and affects the sealing effect, the impact force of the leaked liquid will push the baffle and flow into the interior of the sealing ball. At this time, the liquid inside the sealing ball increases, and the floating plate and the push rod move up, thereby increasing the pressure inside the air duct B. External staff can observe the pressure in the air duct B through the pressure gauge, thereby playing a prompt effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front cross-sectional view of the present invention;

[0019] Figure 2 It is a front view of the present invention;

[0020] Figure 3 For the present invention Figure 1 A magnified image of point A;

[0021] Figure 4 A three-dimensional diagram of the installation frame of the present invention;

[0022] Figure 5 It is a three-dimensional diagram of the connection frame of the present invention.

[0023] In the figure: 1. liquid pipe; 2. piston rod; 3. air duct A; 4. spring A; 5. pressure gauge; 6. valve cap; 7. support rod; 8. mounting frame; 9. connecting tube; 10. flange; 11. air duct B; 12. piston plate; 13. spring B; 14. baffle; 15. floating plate; 16. push rod; 17. sealing ball; 18. through hole; 19. fixing ring; 20. connecting frame. DETAILED DESCRIPTION

[0024] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-5 The present invention provides a technical solution: a high-temperature resistant quick-closing stop valve, comprising a liquid passage 1, a connecting tube 9 is provided at the top of the liquid passage 1, a piston rod 2 is slidably connected inside the connecting tube 9, a sealing ball 17 is provided at the bottom of the piston rod 2, sealing assemblies are provided on both sides of the sealing ball 17, through holes 18 are symmetrically provided at the tops of both sides of the sealing ball 17, an air passage B11 is provided inside the piston rod 2, and the air passage B11 is communicated with the sealing ball 17, a piston plate 12 is slidably connected inside the air passage B11, a push rod 16 is provided at the bottom of the piston plate 12, and a floating plate 15 is provided at the bottom of the push rod 16, mounting frames 8 are symmetrically provided on both sides of the connecting tube 9, a support rod 7 is hinged on the top of the mounting frame 8, a spring A4 is provided on the outside of the piston rod 2, a valve cap 6 is provided at the top of the piston rod 2, a pressure gauge 5 is provided on the top of the valve cap 6, and connecting frames 20 are symmetrically provided on both sides of the bottom of the valve cap 6.

[0026] As a preferred solution of this embodiment: the sealing assembly consists of a spring B13, a baffle 14 and a fixing ring 19. The baffles 14 are symmetrically hinged on both sides of the sealing ball 17, and fixing rings 19 are symmetrically provided at the bottom of both sides of the piston rod 2. A spring B13 is provided on the outside of the fixing ring 19. The fixing ring 19 is connected to the sealing ball 17 to seal the through hole 18 to prevent water from entering the interior of the sealing ball 17.

[0027] As a preferred solution of this embodiment: flanges 10 are provided on the top of the liquid pipe 1 and the outside of the connecting tube 9, and the two sets of flanges 10 are fixedly connected by bolts, which improves the sealing effect and facilitates maintenance when problems occur inside the liquid pipe 1.

[0028] As a preferred solution of this embodiment: the fixing ring 19 is made of an arc-shaped structure, and the fixing ring 19 is located inside the baffle 14 to facilitate the limiting of the baffle 14 .

[0029] As a preferred solution of this embodiment: a sealing plate is provided on one side of the baffle 14, and the sealing plate is made of acrylic ester rubber, which effectively plays a sealing effect.

[0030] As a preferred solution of this embodiment: the pressure gauge 5 is connected to the valve cap 6 by fixing bolts, and reinforcing rods are symmetrically provided on both sides of the pressure gauge 5 to improve the strength of the connection.

[0031] As a preferred solution of this embodiment: a liquid through hole is provided inside the liquid through tube 1, and the diameter of the sealing ball 17 is larger than the diameter of the liquid through hole.

[0032] As a preferred solution of this embodiment: a connecting ring is provided on the top of the outer side of the connecting tube 9, and the mounting frame 8 is connected to the connecting ring by welding.

[0033] As a preferred solution of this embodiment: an air vent A3 is provided at the top of the interior of the piston rod 2, and the air vent A3 is communicated with the air vent B11 to facilitate gas circulation.

[0034] Embodiment 1, as Figure 1 , 2 As shown in Figure 3, when the stop valve needs to be closed, first flip the two sets of support rods 7. At this time, the valve cap 6 loses the supporting force provided by the support rods 7, causing the spring A4 to reset, thereby pulling the valve cap 6, the piston rod 2 and the sealing ball 17 downward, so that the sealing ball 17 blocks the liquid port inside the liquid pipe 1, thereby quickly closing the stop valve.

[0035] Embodiment 2, as Figure 1 , 2As shown in Figure 3, if the sealing ball 17 is corroded and the liquid port is not sealed, the liquid flows out of the sealing ball 17. The impact force of the liquid outflow pushes the baffle 14, causing the baffle 14 to flip. At this time, the liquid flows into the interior of the sealing ball 17 through the through hole 18. When the liquid inside the sealing ball 17 gradually increases, the liquid inside the floating plate 15, the push rod 16 and the piston plate 12 move upward, so that the pressure inside the air passage B11 increases. Then the pressure gauge 5 measures the pressure inside the air passage B11 and displays it on its dial. The staff can observe the pressure data through the dial and then know that the sealing ball 17 is damaged.

[0036] Working principle: When the stop valve needs to be closed, first flip the two sets of support rods 7. At this time, the valve bonnet 6 loses the support force provided by the support rods 7, so that the spring A4 is reset, and then the valve bonnet 6, the piston rod 2 and the sealing ball 17 are pulled down, so that the sealing ball 17 blocks the liquid port inside the liquid pipe 1, thereby quickly closing the stop valve;

[0037] If the sealing ball 17 is corroded and the liquid outlet is not sealed, the liquid flows out of the sealing ball 17. The impact force of the liquid outflow pushes the baffle 14, causing the baffle 14 to flip. At this time, the liquid flows into the interior of the sealing ball 17 through the through hole 18. When the liquid inside the sealing ball 17 gradually increases, the liquid inside the floating plate 15, the push rod 16 and the piston plate 12 move upward, so that the pressure inside the airway B11 increases. Then the pressure gauge 5 measures the pressure inside the airway B11 and displays it on its dial. The staff can observe the pressure data through the dial and then know that the sealing ball 17 is damaged.

[0038] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A high temperature resistant quick closing stop valve, comprising a liquid passage pipe (1), Features: The top of the liquid passage tube (1) is provided with a connecting tube (9), the interior of the connecting tube (9) is slidably connected to a piston rod (2), the bottom of the piston rod (2) is provided with a sealing ball (17), both sides of the sealing ball (17) are provided with sealing components, the tops of both sides of the sealing ball (17) are symmetrically provided with through holes (18), the interior of the piston rod (2) is provided with an air passage B (11), and the air passage B (11) is communicated with the sealing ball (17), and the interior of the air passage B (11) is slidably connected to a piston rod (2). The piston plate (12) is provided with a push rod (16) at the bottom of the piston plate (12), and a floating plate (15) is provided at the bottom of the push rod (16), mounting frames (8) are symmetrically provided on both sides of the connecting tube (9), and a support rod (7) is hinged on the top of the mounting frame (8), a spring A (4) is provided on the outer side of the piston rod (2), a valve cap (6) is provided on the top of the piston rod (2), a pressure gauge (5) is provided on the top of the valve cap (6), and connecting frames (20) are symmetrically provided on both sides of the bottom of the valve cap (6).

2. A high temperature resistant quick closing stop valve according to claim 1, Features: The sealing assembly is composed of a spring B (13), a baffle (14) and a fixing ring (19); the baffles (14) are symmetrically hinged on both sides of the sealing ball (17); fixing rings (19) are symmetrically arranged at the bottom of both sides of the piston rod (2); a spring B (13) is arranged on the outer side of the fixing ring (19); and the fixing ring (19) is connected to the sealing ball (17).

3. A high temperature resistant quick closing stop valve according to claim 1, Features: The top of the liquid passage pipe (1) and the outer side of the connecting tube (9) are both provided with flanges (10), and the two sets of flanges (10) are fixedly connected by bolts.

4. A high temperature resistant quick closing stop valve according to claim 2, Features: The fixing ring (19) is made of an arc-shaped structure, and the fixing ring (19) is located inside the baffle (14).

5. A high temperature resistant quick closing stop valve according to claim 2, Features: A sealing plate is provided on one side of the baffle (14), and the sealing plate is made of acrylic ester rubber.

6. A high temperature resistant quick closing stop valve according to claim 1, Features: The pressure gauge (5) is connected to the valve cap (6) via fixing bolts, and reinforcing rods are symmetrically provided on both sides of the pressure gauge (5).

7. A high temperature resistant quick closing stop valve according to claim 1, Features: The liquid passage pipe (1) is provided with a liquid passage opening inside, and the diameter of the sealing ball (17) is larger than the diameter of the liquid passage opening.

8. A high temperature resistant quick closing stop valve according to claim 1, Features: A connecting ring is provided on the top of the outer side of the connecting tube (9), and the mounting frame (8) is connected to the connecting ring by welding.

9. A high temperature resistant quick closing stop valve according to claim 1, Features: An air vent A (3) is provided at the top of the interior of the piston rod (2), and the air vent A (3) is communicated with the air vent B (11).

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