Gas flow rate control device

Abstract

The utility model relates to the related technical field of flow velocity control devices, in particular to a gas flow velocity control device which comprises a pipeline, one side of the surface of the pipeline is connected with a hollow vertical block, and a replacement mechanism is arranged in the pipeline. According to the gas flow rate control device, through the arrangement of the replacement mechanism, when the filter screen is removed, replaced or cleaned, U-shaped plates on the two sides of the filter screen are moved through the flow rate control mechanism firstly, so that a pipeline is completely closed, then a rotating block is rotated, and the rotating block drives a bolt block to rotate along a threaded inner groove; then the rotating block drives a limiting rotating column with one end embedded in a limiting groove to move, then the limiting rotating column drives the filter screen to be disengaged from a blocking groove continuously till the filter screen is taken out to be replaced or cleaned, the replaced or cleaned filter screen is installed in the same mode, and the sealing effect is achieved through a first sealing ring on the surface of a bolt block; then the U-shaped plate on the front side of the filter screen is moved to the top of the pipeline to be normally opened, and the U-shaped plate on the rear side of the filter screen is used for controlling the gas flow rate.

Description

Technical Field

[0001] The utility model relates to the technical field related to flow rate control devices, and in particular to a gas flow rate control device. Background Art

[0002] A flow rate control device refers to various pneumatic components that control the pressure, flow rate, and flow direction of airflow in a pneumatic system and ensure the normal operation of pneumatic actuators or mechanisms. The structure of a flow rate control device can be decomposed into two parts: the valve body and the valve core. According to the relative position of the two, there are two types: normally closed and normally open. Valves can be structurally divided into three types: stop type, sliding column type, and slide plate type. Therefore, a gas flow rate control device is particularly needed.

[0003] However, the existing gas flow rate control device, the ordinary flow rate control device, can control the flow rate without cleaning the dust adsorbed in the pipeline. After long-term use, the dust may clog the filter, which may cause the dust to clog the filter and the control of the gas flow rate cannot achieve the expected effect. Utility Model Content

[0004] The purpose of the present utility model is to provide a gas flow rate control device to solve the problem that the existing gas flow rate control device proposed in the above background technology is unable to clean the dust adsorbed in the pipeline while controlling the flow rate. During long-term use, dust may clog the filter screen, which may easily lead to dust clogging the filter screen and causing the control of the gas flow rate to fail to achieve the expected effect.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a gas flow rate control device, comprising a pipe, a hollow vertical block connected to one surface side of the pipe, a replacement mechanism provided inside the pipe, a flow rate control mechanism provided inside the pipe, and a thermal gas flow meter installed on one surface side of the pipe;

[0006] The replacement mechanism includes a threaded inner groove, a bolt block, a retaining groove, a filter, a limiting groove, a rotating block, a first sealing ring and a limiting rotary pin. A threaded inner groove is provided on the inner side of the pipe, a bolt block is embedded in the surface of the first pipe, a retaining groove is provided inside the pipe, a filter is embedded in the interior of the pipe, a limiting groove is provided on one side of the surface of the bolt block, a rotating block is connected to one side of the surface of the bolt block, a first sealing ring is sleeved on the surface of the bolt block, and one end of the filter is connected to the limiting rotary pin.

[0007] Preferably, one end of the limiting rotary pin is embedded in the limiting groove, and the size of the limiting rotary pin matches that of the limiting groove.

[0008] Preferably, one end of the bolt block is threadedly connected to the inner thread groove, and one side of the surface of the filter screen is embedded in the inner part of the retaining groove.

[0009] Preferably, the flow rate control mechanism includes a second sealing ring, a U-shaped plate, a threaded rod, a third sealing ring and a turntable. The inner side of the pipe is connected to the second sealing ring, the surface of the pipe is connected through the U-shaped plate, the surface of the hollow vertical block is connected through the threaded rod, the inner side of the hollow vertical block is connected to the third sealing ring, and one end of the threaded rod is connected to the turntable.

[0010] Preferably, one end of the threaded rod is connected to the U-shaped plate through and through, the threaded rod and the U-shaped plate form a movable relationship, and the third sealing ring is sleeved on the surface of the threaded rod.

[0011] Preferably, the second sealing ring is sleeved on one side of the surface of the U-shaped plate, and the U-shaped plate is provided with two groups.

[0012] Compared with the prior art, the beneficial effect of the present invention is that the gas flow rate control device intercepts dust and the like that may be present in the gas through a filter. When the filter is clogged during long-term use, the filter can be taken out for replacement or cleaning by simply rotating the rotating block, which is very convenient and improves the quality of gas inflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the cross-sectional appearance structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the exploded structure of the replacement mechanism of the utility model;

[0015] Figure 3 This is a schematic diagram of the flow rate control mechanism structure of the utility model;

[0016] Figure 4 For this utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0017] In the figure: 1. Pipe; 2. Hollow vertical block; 3. Replacement mechanism; 301. Threaded inner groove; 302. Bolt block; 303. Retaining groove; 304. Filter; 305. Limiting groove; 306. Rotating block; 307. First sealing ring; 308. Limiting rotary column; 4. Flow rate control mechanism; 401. Second sealing ring; 402. U-shaped plate; 403. Threaded rod; 404. Third sealing ring; 405. Rotating disk; 5. Thermal gas flow meter. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-4 The utility model provides a technical solution: a gas flow rate control device, comprising a pipe 1, a hollow vertical block 2 connected to one side of the surface of the pipe 1, a replacement mechanism 3 provided inside the pipe 1, a flow rate control mechanism 4 provided inside the pipe 1, and a thermal gas flow meter 5 installed on one side of the surface of the pipe 1;

[0020] The replacement mechanism 3 includes a threaded inner groove 301, a bolt block 302, a retaining groove 303, a filter 304, a limiting groove 305, a rotating block 306, a first sealing ring 307 and a limiting rotary pin 308. The inner side of the pipe 1 is provided with a threaded inner groove 301, the surface of the first pipe 1 is embedded with a bolt block 302, the interior of the pipe 1 is provided with a retaining groove 303, the interior of the pipe 1 is embedded with a filter 304, one side of the surface of the bolt block 302 is provided with a limiting groove 305, one side of the surface of the bolt block 302 is connected to the rotating block 306, the surface of the bolt block 302 is sleeved with a first sealing ring 307, one end of the filter 304 is connected to the limiting rotary pin 308, when replacing or cleaning the filter 304, first move the filter 304 through the flow rate control mechanism 4. The U-shaped plates 402 on both sides of the filter screen 304 are moved to completely close the pipeline 1, and then the rotating block 306 is rotated. The rotating block 306 drives the bolt block 302 to rotate along the inner thread groove 301, and then the rotating block 306 drives the limiting rotary pin 308, one end of which is embedded in the limiting groove 305, to move. Thereafter, the limiting rotary pin 308 drives the filter screen 304 to continuously disengage from the retaining groove 303 until the filter screen 304 is taken out and replaced or cleaned. The replaced or cleaned filter screen 304 is installed in the same way and sealed by the first sealing ring 307 on the surface of the bolt block 302. Then, the U-shaped plate 402 on the front side of the filter screen 304 is moved to the top of the pipeline 1 to make it normally open. The U-shaped plate 402 on the rear side of the filter screen 304 is used to control the gas flow rate.

[0021] Furthermore, one end of the limiting rotary pin 308 is embedded in the limiting groove 305, and the limiting rotary pin 308 is consistent with the size of the limiting groove 305. Through the setting of the limiting groove 305 and the limiting rotary pin 308, when in use, the limiting rotary pin 308 is connected to the filter screen 304, but is not fixedly connected to the bolt block 302, which can ensure that when the bolt block 302 rotates around the threaded inner groove 301 and moves, it only drives the filter screen 304 to move synchronously without rotating with it.

[0022] Furthermore, one end of the bolt block 302 is threadedly connected to the threaded inner groove 301, and one side of the surface of the filter 304 is embedded in the inside of the retaining groove 303. Through the arrangement of the bolt block 302 and the filter 304, when in use, the bolt block 302 is threadedly connected to the threaded inner groove 301, and when it rotates, it drives the limiting rotary pin 308, one end of which is embedded in the inside of the limiting groove 305, to move, and drives the filter 304 to be completely embedded in the retaining groove 303. The filter 304 can intercept dust that may be contained in the gas, prevent impurities from passing through the pipeline 1, and avoid corrosion to the pipeline 1.

[0023] Furthermore, the flow rate control mechanism 4 includes a second sealing ring 401, a U-shaped plate 402, a threaded rod 403, a third sealing ring 404 and a turntable 405. The inner side of the pipe 1 is connected to the second sealing ring 401, the surface of the pipe 1 is connected through the U-shaped plate 402, the surface of the hollow vertical block 2 is connected through the threaded rod 403, the inner side of the hollow vertical block 2 is connected to the third sealing ring 404, and one end of the threaded rod 403 is connected to the turntable 405. 05, when in use, when controlling the gas flow rate, first rotate the turntable 405, then the turntable 405 drives the threaded rod 403 to rotate, and then the threaded rod 403 drives the U-shaped plate 402 to move up and down to control the gas flow rate, and the gas flow rate is detected by the thermal gas flow meter 5, and the second sealing ring 401 on the inside of the pipe 1 is used to ensure the air tightness between the U-shaped plate 402 and the pipe 1 to prevent gas leakage, and at the same time, the third sealing ring 404 on the inside of the hollow vertical block 2 is used to ensure the air tightness between the threaded rod 403 and the hollow vertical block 2.

[0024] Furthermore, one end of the threaded rod 403 is connected to the U-shaped plate 402, and the threaded rod 403 and the U-shaped plate 402 form a moving relationship. The third sealing ring 404 is sleeved on the surface of the threaded rod 403. Through the setting of the threaded rod 403, when in use, the threaded rod 403 can rotate under the rotation of the turntable 405, and convert the rotational motion of the turntable 405 into the linear motion of the U-shaped plate 402, playing a transmission role, and accurately controlling the position of the U-shaped plate 402 to achieve precise adjustment of the gas flow rate.

[0025] Furthermore, the second sealing ring 401 is sleeved on one side of the surface of the U-shaped plate 402, and the U-shaped plate 402 is provided with two groups. Through the setting of the second sealing ring 401 and the U-shaped plate 402, when in use, the second sealing ring 401 is used to ensure the airtightness between the U-shaped plate 402 and the pipeline 1 to prevent gas leakage during the flow rate control process. The U-shaped plate 402 is driven by the threaded rod 403 to move up and down, thereby changing the gas flow cross-sectional area in the pipeline 1, thereby achieving the purpose of controlling the gas flow rate.

[0026] Working principle: First, when controlling the gas flow rate, rotate the turntable 405, and then the turntable 405 drives the threaded rod 403 to rotate, and then the threaded rod 403 drives the U-shaped plate 402 to move up and down to control the gas flow rate, and the gas flow rate is detected by the thermal gas flow meter 5. The second sealing ring 401 on the inside of the pipe 1 is used to ensure the airtightness between the U-shaped plate 402 and the pipe 1 to prevent gas leakage. At the same time, the third sealing ring 404 on the inside of the hollow vertical block 2 is used to ensure the airtightness between the threaded rod 403 and the hollow vertical block 2. Later, when replacing or cleaning the filter 304, first move the U-shaped plates 402 on both sides of the filter 304 through the flow rate control mechanism 4. , so that the pipeline 1 is completely closed, and then the rotating block 306 is rotated. The rotating block 306 drives the bolt block 302 to rotate along the inner groove 301 of the thread. Then the rotating block 306 drives the limiting rotary pin 308, one end of which is embedded in the limiting groove 305, to move. Then the limiting rotary pin 308 drives the filter screen 304 to continuously disengage from the retaining groove 303 until the filter screen 304 is taken out and replaced or cleaned. The replaced or cleaned filter screen 304 is installed in the same way and sealed by the first sealing ring 307 on the surface of the bolt block 302. Then the U-shaped plate 402 on the front side of the filter screen 304 is moved to the top of the pipeline 1 to make it normally open. The U-shaped plate 402 on the rear side of the filter screen 304 is used to control the gas flow rate.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas flow rate control device, comprising a pipeline (1), characterized in that: A hollow vertical block (2) is connected to one side of the surface of the pipe (1), a replacement mechanism (3) is provided inside the pipe (1), a flow rate control mechanism (4) is provided inside the pipe (1), and a thermal gas flow meter (5) is installed on one side of the surface of the pipe (1); The replacement mechanism (3) comprises a threaded inner groove (301), a bolt block (302), a retaining groove (303), a filter screen (304), a limiting groove (305), a rotating block (306), a first sealing ring (307) and a limiting rotary pin (308); the inner side of the pipe (1) is provided with a threaded inner groove (301); the surface of the pipe (1) is embedded with a bolt block (302); the interior of the pipe (1) is provided with a retaining groove (303); the interior of the pipe (1) is embedded with a filter screen (304); one side of the surface of the bolt block (302) is provided with a limiting groove (305); one side of the surface of the bolt block (302) is connected to the rotating block (306); the surface of the bolt block (302) is sleeved with a first sealing ring (307); and one end of the filter screen (304) is connected to the limiting rotary pin (308).

2. A gas flow rate control device according to claim 1, characterized in that: One end of the limiting rotary column (308) is embedded in the limiting groove (305), and the size of the limiting rotary column (308) matches that of the limiting groove (305).

3. A gas flow rate control device according to claim 1, characterized in that: One end of the bolt block (302) is threadedly connected to the threaded inner groove (301), and one surface side of the filter screen (304) is embedded in the interior of the retaining groove (303).

4. A gas flow rate control device according to claim 1, characterized in that: The flow rate control mechanism (4) comprises a second sealing ring (401), a U-shaped plate (402), a threaded rod (403), a third sealing ring (404) and a rotating disk (405); the inner side of the pipe (1) is connected to the second sealing ring (401); the surface of the pipe (1) is connected through the U-shaped plate (402); the surface of the hollow vertical block (2) is connected through the threaded rod (403); the inner side of the hollow vertical block (2) is connected to the third sealing ring (404); and one end of the threaded rod (403) is connected to the rotating disk (405).

5. A gas flow rate control device according to claim 4, characterized in that: One end of the threaded rod (403) is connected to the U-shaped plate (402) through the threaded rod (403) and the U-shaped plate (402) form a movable relationship. The third sealing ring (404) is sleeved on the surface of the threaded rod (403).

6. A gas flow rate control device according to claim 4, characterized in that: The second sealing ring (401) is sleeved on one side of the surface of the U-shaped plate (402), and the U-shaped plate (402) is provided with two groups.

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