A valve device for isolating air

Abstract

The present invention relates to a valve device for isolating air, comprising a valve body (100) and an exhaust control branch pipe (200) arranged on the top of the valve body, the valve body comprising a separated main channel (110) and a control chamber (120), a ball valve (111) arranged in the main channel, the rotating shaft of the ball valve being coaxially connected to a control gear (112) extending into the control chamber; one end of the exhaust control branch pipe is connected to the main channel through an opening A (210), and the other end is connected to the control chamber through an opening B (220), and an exhaust pipe (230) is arranged on the top of the exhaust control branch pipe. The present invention is provided with an exhaust control branch pipe and a control chamber, and detects whether air is mixed into a liquid transmission pipeline by lifting and lowering a flow control box. When there is air in the valve, the valve can be automatically closed, thereby preventing air from entering the pipeline behind the valve device.

Description

Technical Field

[0001] The present invention relates to a safety protection device for liquid products such as oil products or liquid medicines during production, storage, transportation or use, and in particular to a valve device for isolating air. Background Art

[0002] Various types of liquid products often need to be isolated from air during industrial production and use. However, due to various reasons, air often accidentally enters the transmission pipeline. This air enters the production facilities or the human body through the transmission pipeline, causing damage to the production equipment and facilities or injury to the human body. Therefore, preventing air from entering the production facilities or the human body through the liquid transmission pipeline is an urgent problem that technicians in this field need to solve.

[0003] Based on this, the present invention is proposed. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a valve device for isolating air, which can be installed on a liquid transmission pipeline to exclude air mixed in the liquid.

[0005] The purpose of the present invention is achieved through the following technical solutions.

[0006] A valve device for isolating air comprises a valve body and an exhaust control branch pipe arranged on the top of the valve body, wherein the valve body comprises a separated main channel and a control chamber, wherein:

[0007] A ball valve is provided in the main channel, and the rotating shaft of the ball valve is coaxially connected to the control gear extending into the control chamber;

[0008] A flow control box, a compression spring and an inverted T-shaped plunger rod are arranged in the control chamber. The compression spring is supported at the lower part of the flow control box. The plunger rod passes through the opening D at the bottom of the control chamber and the inner hole of the compression spring from bottom to top and is connected to the flow control box. A rack meshing with the control gear is arranged on the outer side of the flow control box, and an opening C is arranged at the bottom of the flow control box.

[0009] One end of the exhaust control branch pipe is connected to the main channel through opening A, and the other end is connected to the control chamber through opening B. An exhaust pipe is arranged on the top of the exhaust control branch pipe. When air is mixed into the liquid transmission pipeline, the amount of liquid entering the flow control box through opening B will be affected, thereby causing the compression spring to push up the flow control box, so that the rack on the flow control box drives the control gear to rotate, thereby closing the ball valve coaxial with the control gear, and finally cutting off the liquid path of the liquid transmission pipeline.

[0010] Furthermore, an alarm is provided on the exhaust control branch pipe near the lower part of the exhaust pipe.

[0011] Furthermore, the alarm is a tuning fork.

[0012] Furthermore, the flow control box is a box body with an opening on the upper part, and a rack meshing with the control gear is provided on the outer surface thereof, and the opening C is provided at the bottom of the box body near the side wall.

[0013] Furthermore, the opening D is arranged in the middle of the bottom of the control chamber, and its opening size is suitable for the small diameter section of the plunger rod to pass through, and can prevent the large diameter section of the plunger rod from passing through.

[0014] Further, the size of the opening B is larger than that of the opening A, the size of the opening A is larger than that of the opening C, and the size of the opening C is larger than that of the opening D. Thus, during operation, the liquid flow rates of the various openings have the following relationship: the liquid flow rate of the opening B> the liquid flow rate of the opening A> the liquid flow rate of the opening C> the liquid flow rate of the opening D.

[0015] The advantages of the present invention are: an exhaust control branch pipe and a control room are set, and whether air is mixed into the liquid transmission pipeline is detected by raising and lowering the flow control box. When there is air in the valve, the valve can be automatically closed to prevent air from entering the pipeline behind the valve device; an alarm is set, and an alarm is generated when there is air in the valve, so that the staff can be informed of the information that air has entered the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of a valve device for isolating air according to the present invention.

[0017] Figure 2 The invention discloses a side view schematic diagram of a connection structure between a ball valve and a flow control box in one embodiment of a valve device for isolating air according to the present invention.

[0018] Figure 3 yes Figure 2 A schematic top view of the connection structure shown.

[0019] Among them, 100-valve body, 110-main channel, 111-ball valve, 112-control gear, 120-control chamber, 121-flow control box, 122-compression spring, 123-plunger rod, 124-opening D, 125-rack, 126-opening C, 130-partition, 200-exhaust control branch pipe, 210-opening A, 220-opening B, 230-exhaust pipe, 240-alarm. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-3, a valve device for isolating air of the present invention is further described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments and features in the embodiments of this solution can be combined with each other without conflict.

[0021] like Figure 1 As shown, the present invention provides a valve device for isolating air, comprising a valve body 100 and an exhaust control branch pipe 200 arranged on the top of the valve body 100, the valve body 100 comprises a main channel 110 and a control chamber 120 separated by a partition 130, wherein:

[0022] A ball valve 111 is disposed in the main channel 110, and a rotating shaft of the ball valve 111 is coaxially connected to a control gear 112 extending into the control chamber 120; the ball valve 111 and the control gear 112 are respectively disposed on both sides of the partition 130;

[0023] A flow control box 121, a compression spring 122 and an inverted T-shaped plunger rod 123 are provided in the control chamber 120. The compression spring 122 is supported on the lower part of the flow control box 121, and the two can rise and fall synchronously; the inverted T-shaped plunger rod 123 passes through the opening D 124 at the bottom of the control chamber 120 and the inner hole of the compression spring 122 from bottom to top and is connected to the flow control box 121. The connection can be adhesive or welding, preferably a threaded connection; the outer side of the flow control box 121 is provided with a rack 125 meshing with the control gear 112, and the bottom of the flow control box 121 is provided with an opening C 126.

[0024] The exhaust control branch pipe 200 serves to connect the main channel 110 and the control chamber 120, and also serves to remove air. One end of the exhaust control branch pipe 200 is connected to the main channel 110 through the opening A 210, and the other end is connected to the control chamber 120 through the opening B 220. An exhaust pipe 230 is provided on the top of the exhaust control branch pipe 200 for exhausting air. When air is mixed into the liquid transmission pipeline, it will affect the amount of oil entering the flow control box 121 through the B port 220, thereby causing the compression spring 122 to push up the flow control box 121, so that the rack 125 on the flow control box 121 drives the control gear 112 to rotate, thereby closing the ball valve 111 coaxial with the control gear 112, and finally cutting off the liquid path of the liquid transmission pipeline.

[0025] An alarm 240 is provided on the exhaust control branch pipe 200 near the lower part of the exhaust pipe 230. When the detection part of the alarm 240 is exposed to the air, an alarm will be sounded. The alarm is preferably a tuning fork.

[0026] like Figure 2 and Figure 3As shown, the flow control box 121 is a box body with an opening on the upper part, and a rack 125 meshing with the control gear 112 is provided on its outer surface close to the control gear 112, and an opening C126 is provided at the bottom of the box body close to the side wall.

[0027] The opening D124 is disposed in the middle of the bottom of the control chamber 120, and its opening size is suitable for the small diameter section of the inverted T-shaped plunger rod 123 to pass through, and can prevent the large diameter section of the plunger rod 123 from passing through. The large diameter section of the inverted T-shaped plunger rod 123 can cover the opening D124, thereby preventing the oil in the control chamber 120 from entering the main channel 110 behind the ball valve 111.

[0028] The plunger rod 123 is an inverted T-shaped structure, the upper portion of which is a small-diameter round rod, a triangular rod, or a polygonal rod, and the lower portion is a large-diameter circular plate, the area of ​​which is larger than the opening size of the opening D 124 so as to cover the opening D 124 when necessary.

[0029] In order to allow the air isolating valve device of the present invention to work normally, the sizes of several liquid channels are refined. In the present invention, the size (cross-sectional area) of opening B is larger than that of opening A, the size of opening A is larger than that of opening C, and the size of opening C is larger than that of opening D, so that during the working process, the liquid flow rate relationship of each opening is: liquid flow rate of opening B>liquid flow rate of opening A>liquid flow rate of opening C>liquid flow rate of opening D.

[0030] In the present invention, in order to prevent the flow control box 121 from being deflected during the lifting process, a guide groove (not shown in the figure) can be set on the outer wall of the flow control box 121, which cooperates with the guide rod (not shown in the figure) set in the control chamber 120 to ensure that the flow control box 121 moves strictly along a fixed straight path during the lifting process.

[0031] The air-isolating valve device of the present invention can be connected to a liquid transmission pipeline, and the oil in the valve device flows to the following directions: Figure 1As indicated by the small arrow in the figure, after the liquid enters the valve, the ball valve 111 is in a closed state at first. At this time, the liquid cannot pass through the valve and can only go upward through the opening A 210 into the exhaust control branch pipe 200 above, and then flow into the flow control box 121 through the opening B 220, and then flow into the control chamber 120 space below the flow control box 121 through the opening C 126. Since the opening C 126 is smaller than the opening B 220, a part of the liquid will remain in the flow control box 121, causing the control box to continuously increase in weight, and the liquid flowing out through the opening C 126 of the flow control box 121 will flow into the space below the flow control box 121 where the compression spring 122 is arranged. If the mass of the liquid in the flow control box 121 is not enough, the compression spring 122 cannot be shortened, and the large diameter section of the plunger rod 123 covers the opening D 124, so that the liquid cannot flow out and will be stored in the control chamber 120.

[0032] When the mass of liquid in the flow control box 121 is sufficient, the compression spring 122 will be squeezed, and the plunger rod 123 will drop synchronously with the flow control box 121, and the opening D 124 will be opened. At the same time, the rack 125 on the flow control box 121 will drop, driving the control gear 112 coaxial with the ball valve 111 to rotate, and open the ball valve 111. When the amount of liquid in the flow control box 121 reaches full, the compression spring 122 is compressed to the shortest, and at this time, the ball valve 111 is also opened to the maximum, reaching the full flow rate state.

[0033] During use, when the liquid flow rate slows down, the amount of liquid flowing through opening A 210 decreases, while the flow rate of opening B 220 remains unchanged. The weight of the liquid in the flow control box 121 decreases, and the pressure on the compression spring 122 decreases. The compression spring 122 rebounds, and the flow control box 121 moves upward, driving the ball valve 111 to partially close, thereby reducing the liquid flow rate through the entire valve device, ensuring the pressure behind the valve device, and reducing the pressure change on the liquid transmission pipeline behind the valve device.

[0034] When in use, when a large amount of air enters the valve device, the flow control box 121 cannot supply liquid due to the opening A 210, and the opening C 126 reduces the weight of the flow control box 121 after the liquid in the flow control box 121 flows out, and the compression spring 122 bounces up, closing the ball valve 111, and at the same time, the opening D 124 under the compression spring 122 is also closed, closing the ball valve 111 and blocking the liquid from flowing back. The alarm 240 at the highest point in the upper pipe, such as a tuning fork, alarms when it contacts the air.

[0035] It should be noted that the names of opening A, opening B, opening C and opening D are only for distinguishing openings at different positions, and they can also be distinguished by first opening, second opening, third opening and fourth opening.

[0036] The air isolating valve device of the present invention can be used in the production and use of oil products, and can also be used in the medical and health field. For example, it can be used in conjunction with an infusion device or a dialysis device to prevent the input of air harmful to living organisms during liquid delivery.

[0037] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A valve device for isolating air, comprising a valve body (100) and an exhaust control branch pipe (200) arranged on the top of the valve body (100), wherein the valve body (100) comprises a main channel (110) and a control chamber (120) separated from each other, characterized in that: A ball valve (111) is disposed in the main channel (110), and a rotating shaft of the ball valve (111) is coaxially connected to a control gear (112) extending into the control chamber (120); The control chamber (120) is provided with a flow control box (121), a compression spring (122) and an inverted T-shaped plunger rod (123); the compression spring (122) is supported at the lower part of the flow control box (121); the plunger rod (123) passes through an opening D (124) at the bottom of the control chamber (120) and an inner hole of the compression spring (122) from bottom to top and is connected to the flow control box (121); the outer side surface of the flow control box (121) is provided with a rack (125) meshing with the control gear (112); and the bottom of the flow control box (121) is provided with an opening C (126); The plunger rod (123) is an inverted T-shaped structure, the upper part of which is a small-diameter round rod, a triangular rod or a polygonal rod, and the lower part of which is a large-diameter circular plate, the area of ​​which is larger than the opening size of the opening D (124); One end of the exhaust control branch pipe (200) is connected to the main channel (110) through an opening A (210), and the other end is connected to the control chamber (120) through an opening B (220). An exhaust pipe (230) is provided at the top of the exhaust control branch pipe (200).

2. The air-isolating valve device according to claim 1, characterized in that: An alarm (240) is provided on the exhaust control branch pipe (200) at a lower portion close to the exhaust pipe (230).

3. The air-isolating valve device according to claim 2, characterized in that: The alarm (240) is a tuning fork.

4. The air-isolating valve device according to claim 1, characterized in that: The flow control box (121) is a box body with an opening at the top, and a rack (125) meshing with the control gear (112) is provided on its outer surface. The opening C (126) is provided at the bottom of the box body near the side wall.

5. The air-isolating valve device according to claim 1, characterized in that: The opening D (124) is arranged in the middle of the bottom of the control chamber (120), and its opening size is suitable for the small diameter section of the plunger rod (123) to pass through, and can prevent the large diameter section of the plunger rod (123) from passing through.

6. The air-isolating valve device according to claim 1, characterized in that: The size of the opening B (220) is larger than the opening A (210), the size of the opening A (210) is larger than the opening C (126), and the size of the opening C (126) is larger than the opening D (124).

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