Vacuum breaker valve

Abstract

The vacuum breaking valve comprises a connecting part A, a connecting part B and a sealing piece, a connector A is arranged on one side of the connecting part A, internal threads are arranged in the connector A, a connector B is arranged on one side of the connecting part B, external threads A are arranged on the outer wall of the connector B, and the internal threads of the connector A are in threaded connection with the external threads A of the connector B; and the sealing piece is arranged in the connecting part A or the connecting part B. The connecting part A and the connecting part B are in threaded connection, so that disassembly and maintenance are convenient; through the arrangement of the blocking piece, gas can be kept to pass through the vacuum breaking valve; and through the arrangement of the rotating part A and the rotating part B, threaded connection of rotating parts is facilitated. The utility model has a simple structure and can be suitable for various scenes.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and in particular relates to a vacuum breaking valve. Background Art

[0002] In industrial production, the internal states of some pipelines may change from positive pressure to vacuum or negative pressure as the equipment operates. If one end of the pipeline is below the liquid surface, negative pressure can easily lead to a siphon phenomenon, which in turn causes water to enter the pipeline. Since the detection instruments connected to the pipeline will be damaged if they come into contact with the liquid, a valve is needed to prevent the formation of negative pressure in the pipeline and to keep the pipeline in a vacuum or positive pressure state when the equipment is running.

[0003] Patent document CN214425184U discloses a vacuum breaker valve structure comprising a valve body with an upper chamber and a lower chamber, a connecting passage between the upper and lower chambers, an upper opening communicating with the upper chamber and an air inlet, a valve cover disposed on the upper opening, and a sealing ball disposed within the upper chamber to seal the air inlet. The upper opening is located above the air inlet, and the air inlet is provided with an arc adapted to fit the sealing ball. A gap is left between the sealing ball and the inner wall of the upper chamber. However, this structure is not suitable for pipes connected at both ends and can only be used to rupture a pipe when connected at one end.

[0004] Patent document CN204592459U discloses a vacuum-break air supply valve, comprising a valve seat, a valve seal, a gravity ball, and a valve cover. The valve seat is mounted on a turbine support cover, with an air inlet located at the top of the valve seat. The valve seal is mounted on the air inlet, and the gravity ball is placed on the valve seal. The gravity ball has a diameter larger than the air inlet. The outer cavity of the valve seat communicates with a vacuum pressure chamber, while the inner cavity of the valve seat and the gravity ball form an atmospheric pressure chamber. This air supply valve can also only be connected to a pipeline at one end. The technical problem addressed by this patent is air supply, which differs from the technical problem addressed by this application, which is to prevent negative pressure. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a vacuum breaking valve.

[0006] The utility model is achieved through the following technical solutions.

[0007] The utility model provides a vacuum breaker valve, comprising a connection part A, a connection part B and a sealing member. An interface A is provided on one side of the connection part A, and an internal thread is provided in the interface A. An interface B is provided on one side of the connection part B, and an external thread A is provided on the outer wall of the interface B. The internal thread of the interface A is threadedly connected to the external thread A of the interface B. The sealing member is provided in the connection part A or the connection part B.

[0008] Preferably, a cavity A is provided in the connecting portion A, an arc-shaped groove is provided on one side of the cavity A, a limiting step is provided on the other side of the cavity A, a through hole A is provided on one side of the arc-shaped groove, and the sealing member is spherical.

[0009] Preferably, a gasket is provided on the limiting step, and the diameter of the through hole A is smaller than the diameter of the sealing member.

[0010] Preferably, a cavity B is provided in the connecting portion B, a connecting head is provided on one side of the connecting portion B, the connecting head is communicated with the cavity B, a rotating portion B is provided on the outer wall of the connecting head, and the rotating portion B is in an outer hexagonal shape.

[0011] Preferably, a blocking member is provided at the bottom of the cavity B, the blocking member is in a truncated cone shape, a groove is provided at the top of the blocking member, an opening is provided on the side wall of the blocking member, a cavity C is provided inside the blocking member, the cavity C is connected to the opening, one end of the cavity C is an open end, and the open end of the cavity C is connected to the connecting head.

[0012] Preferably, the inner diameter of the cavity B is larger than the diameter of the sealing member.

[0013] Preferably, an external thread B and a rotating portion A are provided on the outer wall of the connecting portion A away from the connecting portion B. The external thread B is located on the outer wall of the end of the connecting portion A, and the rotating portion A is in an external hexagonal shape.

[0014] The beneficial effects of the present invention are:

[0015] The threaded connection between connecting parts A and B facilitates disassembly and maintenance. The blocking member prevents gas from passing through the vacuum breaker valve. The rotating parts A and B facilitate threaded connection of rotating parts. This simple structure makes it suitable for a variety of scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the sealing structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the ventilation state structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the blocking member structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the use of the utility model;

[0020] In the figure: 1-connecting part A, 11-interface A, 12-internal thread, 13-cavity A, 14-arc-shaped groove, 15-limiting step, 16-through hole A, 17-external thread B, 18-rotating part A, 2-connecting part B, 21-interface B, 22-external thread A, 23-cavity B, 3-sealing part, 4-gasket, 5-connector, 51-rotating part B, 6-blocking part, 61-groove, 62-opening, 63-cavity, 7-pipeline A, 71-valve, 8-pipeline B, 9-liquid storage tank, 10 main pipeline, 101-device B. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the described solution.

[0022] Example:

[0023] like Figures 1 to 4 As shown, a vacuum breaker valve includes a connection part A1, a connection part B2 and a sealing member 3. An interface A11 is provided on one side of the connection part A1, and an internal thread 12 is provided in the interface A11. An interface B21 is provided on one side of the connection part B2, and an external thread A22 is provided on the outer wall of the interface B21. The internal thread 12 of the interface A11 is threadedly connected with the external thread A22 of the interface B21. The connection part A1 and the connection part B2 are arranged to be threadedly connected for easy disassembly. The sealing member 3 is provided in the connection part A1 or the connection part B2.

[0024] A cavity A13 is provided in the connecting portion A1, and an arc-shaped groove 14 is provided on one side of the cavity A13 to adapt to the shape of the seal 3. A limiting step 15 is provided on the other side of the cavity A13, and a through hole A16 is provided on one side of the arc-shaped groove 14. The seal 3 is spherical.

[0025] A gasket 4 is provided on the limiting step 15 to improve the sealing performance after the connection part A1 is connected to the connection part B2. The diameter of the through hole A16 is smaller than the diameter of the seal 3, so that the seal 3 can block the gas flow in the arc-shaped groove 14.

[0026] A cavity B23 is provided in the connecting portion B2, a connecting head 5 is provided on one side of the connecting portion B2, the connecting head 5 is communicated with the cavity B23, a rotating portion B51 is provided on the outer wall of the connecting head 5, and the rotating portion B51 is in an external hexagonal shape, which is convenient for rotation using tools such as a wrench.

[0027] A blocking member 6 is provided at the bottom of the cavity B23. The blocking member 6 is in a truncated cone shape. A groove 61 is provided at the top of the blocking member 6. The groove 61 matches the shape of the seal 3. The seal 3 falls onto the groove 61 in the ventilation state. An opening 62 is provided on the side wall of the blocking member 6. The gas enters the cavity B23 through the opening 62. A cavity C63 is provided inside the blocking member 6. The cavity C63 is connected to the opening 62. One end of the cavity C63 is an open end. The open end of the cavity C63 is connected to the connector 5.

[0028] The inner diameter of the cavity B23 is larger than the diameter of the sealing member 3 to prevent the sealing member 3 from blocking the flow of air in the cavity B23.

[0029] An external thread B17 and a rotating part A18 are provided on the outer wall of the connecting part A1 on the side away from the connecting part B2. The external thread B17 is located on the outer wall of the end of the connecting part A1, so that the connecting part A1 can be connected to the pipeline through the external thread B17. The rotating part A18 is in an external hexagonal shape, which is convenient for rotation using tools such as a wrench.

[0030] A method for using a vacuum breaker valve comprises the following steps:

[0031] S1: After assembling the vacuum breaker valve, connect the connection part B2 upward to the pipe A7, and the connection part A1 downward to the pipe B8. The valve 71 is set on the pipe A7; the pipe B8 extends deep into the liquid storage tank 9, and one end of the pipe B8 does not extend below the liquid level in the liquid storage tank 9. The pipe B8 can be set as needed and is mainly used for liquid drainage. One end of the pipe A7 is connected to the main pipe 10, and one end of the main pipe 10 extends below the liquid level in the liquid storage tank 9. The other end of the main pipe 10 is connected to other equipment to form the device A. The device B101 is set on the main pipe 10; the device B101 can be a detection instrument;

[0032] S2: When the device A is operating normally, both the pipe A7 and the main pipe 10 are under positive pressure. At this time, the seal 3 is in close contact with the inner wall of the arc-shaped groove 14, and the valve 71 is in the open state;

[0033] S3: When the other end of the main pipe 10 is connected to other equipment and stops running, due to the vacuum or negative pressure formed in the main pipe 10, the seal 3 leaves the arc-shaped groove 14 and is sucked toward the blocking member 6. At this time, since air can enter the vacuum breaking valve through the pipe B8 and enter the pipe A7 and the main pipe 10, the siphon phenomenon can be avoided in the main pipe 10, thereby protecting the device B101 from damage due to siphoning water.

[0034] The above-mentioned method of use can be applied to the steam heating process of a rare earth extraction and separation production line, or other production lines with similar structures, and can prevent the formation of vacuum or negative pressure in the pipeline and the suction of liquid.

Claims

1. A vacuum breaker valve, characterized in that: The invention comprises a connecting portion A (1), a connecting portion B (2) and a sealing member (3), wherein an interface A (11) is provided on one side of the connecting portion A (1), an internal thread (12) is provided in the interface A (11), an interface B (21) is provided on one side of the connecting portion B (2), an external thread A (22) is provided on the outer wall of the interface B (21), the internal thread (12) of the interface A (11) is threadedly connected to the external thread A (22) of the interface B (21), and the sealing member (3) is provided in the connecting portion A (1) or the connecting portion B (2).

2. A vacuum breaker valve according to claim 1, characterized in that: A cavity A (13) is provided in the connecting portion A (1), a circular arc groove (14) is provided on one side of the cavity A (13), a limiting step (15) is provided on the other side of the cavity A (13), a through hole A (16) is provided on one side of the circular arc groove (14), and the sealing member (3) is spherical.

3. A vacuum breaker valve according to claim 2, characterized in that: A gasket (4) is provided on the limiting step (15), and the diameter of the through hole A (16) is smaller than the diameter of the sealing member (3).

4. A vacuum breaker valve according to claim 1, characterized in that: A cavity B (23) is provided in the connecting portion B (2), a connecting head (5) is provided on one side of the connecting portion B (2), the connecting head (5) is communicated with the cavity B (23), a rotating portion B (51) is provided on the outer wall of the connecting head (5), and the rotating portion B (51) is in an outer hexagonal shape.

5. A vacuum breaker valve according to claim 4, characterized in that: A blocking member (6) is provided at the bottom of the cavity B (23), the blocking member (6) is in a truncated cone shape, a groove (61) is provided at the top of the blocking member (6), an opening (62) is provided on the side wall of the blocking member (6), a cavity C (63) is provided inside the blocking member (6), the cavity C (63) is communicated with the opening (62), one end of the cavity C (63) is an open end, and the open end of the cavity C (63) is communicated with the connector (5).

6. A vacuum breaker valve according to claim 4, characterized in that: The inner diameter of the cavity B (23) is greater than the diameter of the sealing member (3).

7. A vacuum breaker valve according to claim 1, characterized in that: An external thread B (17) and a rotating portion A (18) are provided on the outer wall of the connecting portion A (1) away from the connecting portion B (2). The external thread B (17) is located on the outer wall of the end of the connecting portion A (1), and the rotating portion A (18) is in an external hexagonal shape.

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