Gate valve with gas detection function

Abstract

The gate valve with the gas detection function comprises a valve body, a gas inlet, a gas outlet, a valve cover, a threaded column and a pressure sensor, the gas inlet is formed in the front side of the valve body, a gas inlet baffle is arranged on the rear side of the gas inlet, the gas outlet is formed in the rear side of the valve body, a gas outlet baffle is arranged at the front end of the gas outlet, and the valve cover is connected to the upper side of the valve body. Movable plates which are connected through movable connecting rods, movable grooves, limiting rods and springs are arranged in the first air conveying opening and the second air conveying opening, so that when the air pressure is too high, the movable plates are shrunk through impact of high-speed airflow, the movable connecting rods touch the pressure sensors, and therefore high-pressure alarming is completed; the air flow can also enter the three-way pipe at the bottom of the valve plate through the first air conveying port, and when the air pressure is too large, the three-way pipe can contract to give an alarm, so that the air pressure of the air can be detected no matter the flowing air flow is closed.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a gate valve with gas detection function. Background Art

[0002] Gas pipelines are mainly used to transport natural gas, liquefied petroleum gas, and artificial coal gas. During long-distance transportation, gas pipelines need to be composed of several gas supply pipes connected in sequence. Adjacent gas supply pipes need to be connected by sealed connecting valves to improve the sealing of pipeline connections and the convenience of assembly. During the operation of gas pipelines, in order to effectively control the gas in the pipeline, gate valves are often installed in the pipeline.

[0003] In order to detect the air pressure in the existing gas pipeline, an air pressure detector is often installed at the gate valve on the pipeline. The air pressure detector is mostly connected to the gate valve through a flange. This will increase the number of connection structures in the pipeline and make the air tightness of the pipeline worse. When the air pressure is high, it is easy to leak and be damaged. Therefore, we propose a gate valve with gas detection to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a gate valve with gas detection to solve the problem that the connection structures of the gate valves with gas detection in the current market are too numerous and prone to leakage as mentioned in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gate valve with gas detection, comprising a valve body, an air inlet, an air outlet, a valve cover, a threaded column and a pressure sensor, wherein an air inlet is arranged on the front side of the valve body, and an air inlet baffle is arranged on the rear side of the air inlet, and an air outlet is arranged on the rear side of the valve body, and an air outlet baffle is arranged at the front end of the air outlet, a valve cover is connected to the upper side of the valve body, a sampling tube is arranged on the valve cover, and a threaded column is arranged in the valve cover, a valve plate is connected to the bottom of the threaded column, and a first air delivery port is arranged on the front and rear sides of the bottom of the valve plate, and a second air delivery port is arranged at the bottom of the valve plate, a movable plate is arranged in the first air delivery port, a movable connecting rod is connected to the center of the movable plate, and a movable groove is connected to the outer side of the movable connecting rod, a pressure sensor is arranged on the top of the movable groove, limit rods are arranged on both sides of the movable plate, and a spring is connected to the top of the limit rod, and the top of the spring is connected to the bottom of the valve plate.

[0006] Preferably, the air inlet baffle and the air outlet baffle form an "S"-shaped flow guide structure in the valve body, and the air inlet baffle and the air outlet baffle form an airtight structure with the front and rear sides of the first air delivery port at the bottom of the valve plate when delivering air and closing.

[0007] Preferably, the left and right surfaces inside the valve cover are inclined, and the front and rear sides of the valve cover are connected to the valve plate through sliding grooves.

[0008] Preferably, the threaded column is connected to the valve plate via a rotating shaft, and the threaded column is connected to the valve cover via a nut.

[0009] Preferably, the first gas delivery port and the second gas delivery port form a three-way pipe structure at the bottom of the valve plate.

[0010] Preferably, the movable plate is connected to the bottom of the valve plate via a movable connecting rod, a movable groove, a limiting rod and a spring.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the gate valve with gas detection:

[0012] (1) By arranging two groups of front and rear air inlet baffles and air outlet baffles in the pipeline in the valve body, and cooperating with the three-way pipe composed of the first air delivery port and the second air delivery port at the bottom of the valve plate, the rotation of the threaded column can make the valve plate ventilate through the first air delivery port and the second air delivery port when it is on the upper side, and can be closed when it is at the bottom. In the first air delivery port and the second air delivery port, a movable plate connected by a movable connecting rod, a movable groove, a limit rod and a spring is arranged, so that when the air pressure is too high, the movable plate is contracted by the impact of the high-speed airflow, so that the movable connecting rod touches the pressure sensor to complete the high-pressure alarm. At the same time, when closing, the airflow can also enter the three-way pipe at the bottom of the valve plate through the first air delivery port, and when the air pressure is too high, it can also contract to alarm, so that the gas pressure can be detected regardless of whether the airflow is flowing or closed, so that the detection device is directly installed inside the valve body without external connection, thereby reducing the interface and reducing the probability of leakage;

[0013] (2) By setting the left and right surfaces inside the valve cover as inclined surfaces and connecting the valve plate at the bottom, the three-way pipe composed of the first gas supply port and the second gas supply port at the bottom of the valve plate can supply gas to the valve cover through the inclined surface after being driven upward by the threaded column, thereby facilitating manual sampling investigation through the sampling tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the front cross-sectional structure of the valve plate of the utility model when it is closed;

[0016] Figure 3 This is a schematic diagram of the sampled front section structure of the utility model;

[0017] Figure 4 It is a schematic diagram of the side section structure of the utility model;

[0018] Figure 5 It is a schematic diagram of the side section structure of the valve plate of the utility model.

[0019] In the figure: 1. valve body; 2. air inlet; 3. air inlet baffle; 4. air outlet; 5. air outlet baffle; 6. valve cover; 7. sampling tube; 8. threaded column; 9. valve plate; 10. first air delivery port; 11. second air delivery port; 12. movable plate; 13. movable connecting rod; 14. movable groove; 15. pressure sensor; 16. limit rod; 17. spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 The utility model provides a technical solution: a gate valve with gas detection, including a valve body 1, an air inlet 2, an air inlet baffle 3, an air outlet 4, an air outlet baffle 5, a valve cover 6, a sampling tube 7, a threaded column 8, a valve plate 9, a first air delivery port 10, a second air delivery port 11, a movable plate 12, an movable connecting rod 13, an movable groove 14, a pressure sensor 15, a limit rod 16 and a spring 17, the front side of the valve body 1 is provided with an air inlet 2, and the rear side of the air inlet 2 is provided with an air inlet baffle 3, and the rear side of the valve body 1 is provided with an air outlet 4, the front end of the air outlet 4 is provided with an air outlet baffle 5, the upper side of the valve body 1 is connected with a valve cover 6, and the valve A sampling tube 7 is arranged on the cover 6, and a threaded column 8 is arranged inside the valve cover 6, a valve plate 9 is connected to the bottom of the threaded column 8, and a first gas delivery port 10 is arranged on the front and rear sides of the bottom of the valve plate 9, and a second gas delivery port 11 is arranged at the bottom of the valve plate 9, a movable plate 12 is arranged inside the first gas delivery port 10, and a movable connecting rod 13 is connected to the center of the movable plate 12, and a movable groove 14 is connected to the outer side of the movable connecting rod 13, a pressure sensor 15 is arranged on the top of the movable groove 14, and limit rods 16 are arranged on both sides of the movable plate 12, and a spring 17 is connected to the top of the limit rod 16, and the top of the spring 17 is connected to the bottom of the valve plate 9.

[0022] The air inlet baffle 3 and the air outlet baffle 5 form an "S"-shaped flow guide structure in the valve body 1, so that the air inlet baffle 3 and the air outlet baffle 5 can guide the airflow, so that when the air pressure is too high, the high-speed airflow collides with the air inlet baffle 3, the air outlet baffle 5 and the valve plate 9, which is convenient for generating vibration through the impact of the airflow, so that the pressure sensor 15 senses it and alarms, and the air inlet baffle 3 and the air outlet baffle 5 respectively form an airtight structure with the front and rear sides of the first air delivery port 10 at the bottom of the valve plate 9 when supplying gas and closing, so that there can always be gas in the three-way pipe formed by the first air delivery port 10 and the second air delivery port 11, so that the detection mechanism composed of the movable plate 12, the movable connecting rod 13 and the pressure sensor 15 can always detect the state of the gas pressure.

[0023] The left and right surfaces inside the valve cover 6 are inclined, so that after the valve plate 9 is raised, air can be ventilated through the first gas delivery port 10 and the second gas delivery port 11 at the bottom of the valve plate 9 through the inclined surface, so that the gas in the valve body 1 can be sampled through the sampling tube 7, and the front and rear sides of the valve cover 6 are connected to the valve plate 9 through sliding grooves, which facilitates the movement of the valve plate 9 and prevents the valve plate 9 from rotating following the threaded column 8.

[0024] The threaded column 8 is connected to the valve plate 9 via a rotating shaft, and the threaded column 8 is connected to the valve cover 6 via a nut, so that the rotation of the threaded column 8 can drive the valve plate 9 to move up and down.

[0025] The first gas delivery port 10 and the second gas delivery port 11 form a three-way pipe structure at the bottom of the valve plate 9, so that the first gas delivery port 10 is always filled with gas, which facilitates the detection mechanism composed of the movable plate 12, the movable connecting rod 13 and the pressure sensor 15 to detect the air pressure.

[0026] The movable plate 12 is connected to the bottom of the valve plate 9 by means of a movable connecting rod 13, a movable groove 14, a limit rod 16 and a spring 17, so that vibration is generated by the impact of the airflow, so that the movable plate 12 moves up and down, so that the movable connecting rod 13 hits the pressure sensor 15, thereby an alarm is triggered and a space is left between the movable connecting rod 13 and the pressure sensor 15 to avoid a false alarm caused by the movable connecting rod 13 hitting the pressure sensor 15 due to a small change in air pressure.

[0027] The threaded column 8 is provided with scales to facilitate the determination of the positions of the first gas delivery port 10 and the second gas delivery port 11 at the bottom.

[0028] Working principle: When using this gate valve with gas detection, first, connect the valve body 1 to the gas pipeline through the flange, then rotate the turntable outside the threaded column 8 to make the valve plate 9 rise, so that the first gas delivery port 10 at the bottom of the valve plate 9 enters the top opening of the gas outlet baffle 5 of the gas outlet 4, so that the air flow is guided by the gas inlet 2 of the valve body 1 and the gas inlet baffle 3 from the second gas delivery port 11 to the first gas delivery port 10 at the bottom of the valve plate 9, and then enters the gas outlet 4 from the rear side of the first gas delivery port 10 to exit the valve body;

[0029] When the air pressure in the pipeline is too high, the gas flow rate will increase and hit the inner wall of the pipeline. When the gas flows through the valve body 1, the high-speed airflow will pass through the blocking structure formed by the air inlet baffle 3 and the air outlet baffle 5 and enter the first air delivery port 10 from the second air delivery port 11. At this time, the high-speed airflow will hit the movable plate 12 in the first air delivery port 10 when turning, so that the movable plate 12 drives the movable connecting rod 13 connected thereto to rise, so that the movable connecting rod 13 hits the pressure sensor 15 at the top, so that the pressure sensor 15 reacts and activates the alarm connected thereto, thereby attracting the attention of the staff and controlling the gas in the pipeline.

[0030] When the staff conducts regular sampling surveys on the gas in the pipeline, they first rotate the threaded column 8 to make the valve plate 9 rise until the first gas delivery port 10 at the bottom of the valve plate 9 enters the valve cover 6, so that the gas can pass through the second gas delivery port 11 from the first gas delivery port 10 and the inclined surface of the valve cover 6 into the cavity in the valve cover 6, and then draw the sample from the sampling tube 7 on the top of the valve plate 9 for collection. After the collection is completed, the threaded column 8 is rotated in the opposite direction to make the first gas delivery port 10 enter the opening on the upper side of the gas outlet baffle 5. The contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gate valve with gas detection, comprising a valve body (1), an air inlet (2), an air outlet (4), a valve cover (6), a threaded column (8) and a pressure sensor (15), characterized in that: The valve body (1) is provided with an air inlet (2) at the front side, and an air inlet baffle (3) is provided at the rear side of the air inlet (2), and an air outlet (4) is provided at the rear side of the valve body (1), and an air outlet baffle (5) is provided at the front end of the air outlet (4), the valve body (1) is connected with a valve cover (6) at the upper side, and a sampling tube (7) is provided on the valve cover (6), and a threaded column (8) is provided inside the valve cover (6), the bottom of the threaded column (8) is connected with a valve plate (9), and the front and rear sides of the bottom of the valve plate (9) are provided with a first A gas delivery port (10) is provided, and a second gas delivery port (11) is provided at the bottom of the valve plate (9); a movable plate (12) is provided inside the first gas delivery port (10); a movable connecting rod (13) is connected to the center of the movable plate (12); a movable groove (14) is connected to the outer side of the movable connecting rod (13); a pressure sensor (15) is provided at the top of the movable groove (14); limiting rods (16) are provided on both sides of the movable plate (12); and a spring (17) is connected to the top of the limiting rod (16).

2. A gate valve with gas detection according to claim 1, characterized in that: The air inlet baffle (3) and the air outlet baffle (5) form an "S"-shaped flow-guiding structure in the valve body (1), and the air inlet baffle (3) and the air outlet baffle (5) respectively form an airtight structure with the front and rear sides of the first air delivery port (10) at the bottom of the valve plate (9) when delivering air and closing the valve plate.

3. A gate valve with gas detection according to claim 1, characterized in that: The left and right surfaces inside the valve cover (6) are inclined, and the front and rear sides of the valve cover (6) are connected to the valve plate (9) via sliding grooves.

4. A gate valve with gas detection according to claim 1, characterized in that: The threaded column (8) and the valve plate (9) are connected via a rotating shaft, and the threaded column (8) is connected to the valve cover (6) via a nut.

5. A gate valve with gas detection according to claim 1, characterized in that: The first gas delivery port (10) and the second gas delivery port (11) form a three-way pipe structure at the bottom of the valve plate (9).

6. A gate valve with gas detection according to claim 1, characterized in that: The movable plate (12) is connected to the bottom of the valve plate (9) via a movable connecting rod (13), a movable groove (14), a limiting rod (16) and a spring (17).

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