Anti-blocking gas flow control device and method

Abstract

The invention relates to the technical field of gas conveying, in particular to an anti-blocking gas flow control device and method.The anti-blocking gas flow control device comprises a pump body, a filter box and a combiner box, a housing is arranged on one side of the combiner box in a communicating mode, an outlet pipe is arranged on the other side of the housing in a communicating mode, and an air pressure detection module is fixed to the surface of the outlet pipe; an inlet pipe is communicated with an outlet of the pump body, the other end of the inlet pipe is communicated with a filter box, a bottom groove is formed in the bottom of the filter box, and filter mechanisms are arranged in the filter box and at the bottom of the filter box; by opening or closing an electromagnetic valve, a corresponding number of connecting pipes and conveying pipes are in a closed or open state, so that the flow of gas is roughly adjusted, a driving motor is started to drive a driving rod to rotate, a threaded sleeve on the surface of the driving rod drives a moving plate to descend, and a longitudinal rod drives an adjusting plate to descend; the size of the through hole is adjusted, namely the flow of the through hole is changed, and fine adjustment of the gas flow is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of gas delivery, and in particular to an anti-blocking gas flow control device and method. Background Art

[0002] Gas transportation refers to the process of transporting gas from one place to another with the help of gas flow. Gas mass flow controllers are used to accurately measure and control gas mass flow. They are important in scientific research and production in various fields such as semiconductor and integrated circuit technology, special materials, chemical industry, petroleum industry, medicine, environmental protection and vacuum.

[0003] The existing related technologies often have the following defects: the pressure gas flow controller with traditional structure is generally composed of a flow limiter, a proportional valve, a pressure sensor and a pump with a fixed speed. Among them, the proportional valve needs to be imported, which makes it expensive and greatly increases the cost. Moreover, in harsh environments, the proportional valve is easily blocked by impurities in the gas, the scrap rate remains high, and maintenance is extremely difficult. At the same time, its adjustment method is relatively single, which is difficult to meet the increasingly diverse actual needs. Summary of the invention

[0004] The object of the present invention is to provide a gas flow control device and method that is anti-clogging, which has diversified adjustment methods and low cost, and can filter impurities in the gas and extend the service life of valve components in the device.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gas flow control device for preventing blockage, comprising a pump body, a filter box and a junction box, one side of the junction box is connected to a cover shell, the other side of the cover shell is connected to an outlet pipe, a gas pressure detection module is fixed on the surface of the outlet pipe, the outlet of the pump body is connected to an inlet pipe, the other end of the inlet pipe is connected to the filter box, a bottom groove is provided at the bottom of the filter box, a filtering mechanism is provided inside and at the bottom of the filter box, a connecting pipe is connected to the other side of the filter box, a solenoid valve is connected to the other end of the connecting pipe, a delivery pipe is connected to the other end of the solenoid valve, a support assembly is provided on the surface of the solenoid valve, the other end of the delivery pipe is connected to an adjustment box, a top cover is bolted to the top of the adjustment box, a fixing plate is bolted to the inner wall of the top cover, a through hole is provided on the surface of the fixing plate, a through pipe is connected to the other side of the adjustment box, the other end of the through pipe is connected to the junction box, an adjustment plate is slidably provided on the surface of the fixing plate, and a driving mechanism is provided inside the top cover.

[0006] Preferably, the filtering mechanism comprises a hydraulic rod, a connecting plate, a blocking plate and a filter screen, the connecting plate is bolted to the output shaft of the hydraulic rod, the blocking plate is bolted to the top of the connecting plate, and the filter screen is fixed to the top of the blocking plate.

[0007] Preferably, sealing pads are bonded to both sides of the surface of the blocking plate, and the length of the sealing pads is the same as the length of the blocking plate.

[0008] Preferably, the inner wall of the bottom groove is designed in a T-shape, and the shape of the blocking plate is the same as the shape of the inner wall of the bottom groove.

[0009] Preferably, the driving mechanism includes a driving motor, a driving rod, a threaded sleeve, a movable plate, a longitudinal rod, a sliding sleeve and a limit assembly, the driving motor is bolted to the inside of the top cover, the driving rod is rotatably connected to the inner wall of the top cover, the threaded sleeve is threadedly connected to the surface of the driving rod, the movable plate is bolted to the threaded sleeve, the longitudinal rod is bolted to the bottom of the movable plate, the sliding sleeve passes through the surface arranged on the top of the adjusting box, the longitudinal rod is slidably connected to the inner wall of the sliding sleeve, the bottom end of the longitudinal rod is bolted to the adjusting plate, and the output shaft of the driving motor is connected to the driving rod through a belt drive.

[0010] Preferably, the limit assembly consists of a first limit switch, a support plate and a second limit switch, the first limit switch is bolted to the top of the inner cavity of the top cover, the support plate is bolted to the bottom of the inner cavity of the top cover, the second limit switch is bolted to the top of the support plate, and the first limit switch and the second limit switch are both electrically connected to the drive motor.

[0011] Preferably, elastic rings are bonded to both the upper and lower sides of the sliding sleeve, and the longitudinal rod is slidably connected to the inner ring of the elastic ring.

[0012] Preferably, the support assembly is composed of vertical plates, horizontal plates and support blocks, the vertical plates are in two groups, the horizontal plates are bolted to opposite sides of the vertical plates, and the support blocks are bolted to the tops of the horizontal plates.

[0013] Preferably, the inner diameter of the through hole is the same as the inner diameter of the through pipe, and the width of the adjustment plate is greater than the inner diameter of the through hole.

[0014] A method for controlling gas flow to prevent blockage, the method comprising the following steps:

[0015] Step a: First, turn on the pump body, and the gas enters through the inlet of the pump body, and then enters the filter box through the inlet pipe. After the gas enters the filter box, it passes through the filter screen in the filter box, and the filter screen can filter impurities in the gas;

[0016] Step b: Open the solenoid valves at the same time to keep the corresponding connecting pipes in an open state. If a large flow needs to be adjusted, more solenoid valves can be opened to keep more connecting pipes in an unobstructed state to increase the gas flow. If a small flow needs to be adjusted, only a small number of solenoid valves need to be opened to keep a small number of connecting pipes in an unobstructed state to reduce the gas flow. In this process, the effect of coarsely adjusting the gas flow is achieved;

[0017] Step c: The gas enters the regulating box through the solenoid valve and the delivery pipe, and the driving motor is turned on to drive the driving rod to rotate, so that the moving plate and the longitudinal rod drive the regulating plate to descend, changing the size of the through hole opening, that is, changing the flow rate of the through hole to achieve fine adjustment;

[0018] Step d: After the gas passes through the regulating box, the through pipe, the junction box, the cover and the outlet pipe, the regulated delivery of the gas is realized;

[0019] Step e: After the conveying work is completed, the hydraulic rod can be opened to retract its output shaft to drive the connecting plate and the blocking plate to descend, so that the filter screen is placed on the outside for easy cleaning.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention can control a corresponding number of connecting pipes and delivery pipes to be in a closed or open state by opening or closing the solenoid valve, thereby realizing coarse adjustment of the gas flow rate. This method is easy to operate and can quickly adjust the gas flow rate within a large range. At the same time, when more precise flow adjustment is required, the drive motor can be turned on, and the drive motor drives the drive rod to rotate, so that the threaded sleeve on the surface of the drive rod drives the moving plate to descend, and the moving plate further drives the adjustment plate to descend through the longitudinal rod to adjust the size of the through hole. In this way, the flow rate of the through hole can be accurately changed to realize fine adjustment of the gas flow rate. Whether in scientific research experiments with high requirements for gas flow accuracy or in the precise control link of industrial production, this fine adjustment function has great practical value. In addition, the present invention also takes into account the impurities that may exist in the gas. The problem is that a filter is set in the channel through which the gas flows, which can effectively filter the impurities in the gas, which can not only ensure the purity of the gas and prevent impurities from causing adverse effects on subsequent equipment or processes, but also improve the stability and reliability of the entire gas delivery system. After the gas delivery work is completed, the hydraulic rod can be opened to shrink its output shaft. The contraction of the hydraulic rod will drive the connecting plate, the sealing plate and the filter to descend, so that the filter is located on the outside. This design is very user-friendly and convenient for the staff to clean the impurities on the surface of the filter. The cleanability of the filter ensures that it can always maintain a good filtering effect during long-term use, extends the service life of the filter, and reduces the maintenance cost of the equipment. At the same time, it also enables the entire gas delivery system to operate continuously and stably, providing reliable gas supply for various application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the local structure in the present invention;

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the filter box in the present invention;

[0025] Figure 4 It is a schematic diagram of the local structure in the present invention;

[0026] Figure 5 It is a structural schematic diagram of the support assembly in the present invention;

[0027] Figure 6 It is a schematic diagram of the cross-sectional structure of the regulating box and the top cover in the present invention;

[0028] Figure 7 It is a structural schematic diagram of the driving mechanism in the present invention;

[0029] Figure 8It is a structural schematic diagram of the sliding sleeve in the present invention;

[0030] Fig. 9 It is a structural schematic diagram of the blocking plate in the present invention.

[0031] In the figure: 1, pump body; 2, filter box; 3, junction box; 4, outlet pipe; 5, air pressure detection module; 6, cover; 7, inlet pipe; 8, bottom tank; 9, filter mechanism; 91, hydraulic rod; 92, connecting plate; 93, blocking plate; 94, filter screen; 95, sealing gasket; 10, connecting pipe; 11, solenoid valve; 12, support assembly; 121, vertical plate; 122, horizontal plate; 123, support block; 13, delivery pipe; 14 , adjusting box; 15, top cover; 16, fixing plate; 17, through hole; 18, adjusting plate; 19, through pipe; 20, driving mechanism; 201, driving motor; 202, driving rod; 203, threaded sleeve; 204, moving plate; 205, longitudinal rod; 206, sliding sleeve; 207, elastic ring; 208, limit assembly; 2081, first limit switch; 2082, support plate; 2083, second limit switch. DETAILED DESCRIPTION

[0032] 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.

[0033] See also Figure 1-9 A gas flow control device for preventing blockage includes a pump body 1, a filter box 2 and a junction box 3. A cover shell 6 is connected to one side of the junction box 3, an outlet pipe 4 is connected to the other side of the cover shell 6, an air pressure detection module 5 is fixed on the surface of the outlet pipe 4, an inlet pipe 7 is connected to the outlet of the pump body 1, the other end of the inlet pipe 7 is connected to the filter box 2, a bottom groove 8 is provided at the bottom of the filter box 2, a filtering mechanism 9 is provided inside and at the bottom of the filter box 2, a connecting pipe 10 is connected to the other side of the filter box 2, and an electromagnetic valve is connected to the other end of the connecting pipe 10. 11, the other end of the solenoid valve 11 is connected to a delivery pipe 13, a support assembly 12 is provided on the surface of the solenoid valve 11, the other end of the delivery pipe 13 is connected to a regulating box 14, a top cover 15 is bolted to the top of the regulating box 14, a fixing plate 16 is bolted to the inner wall of the top cover 15, a through hole 17 is penetrated through the surface of the fixing plate 16, a through pipe 19 is connected to the other side of the regulating box 14, the other end of the through pipe 19 is connected to the junction box 3, an adjusting plate 18 is slidably provided on the surface of the fixing plate 16, and a driving mechanism 20 is provided inside the top cover 15.

[0034] The filter mechanism 9 includes a hydraulic rod 91, a connecting plate 92, a blocking plate 93 and a filter screen 94. The connecting plate 92 is bolted to the output shaft of the hydraulic rod 91, the blocking plate 93 is bolted to the top of the connecting plate 92, and the filter screen 94 is fixed to the top of the blocking plate 93. The hydraulic rod 91 is turned on to extend its output shaft to drive the connecting plate 92 and the blocking plate 93 upward, and the filter screen 94 passes through the bottom groove 8 into the interior of the filter box 2, and then the blocking plate 93 blocks the bottom groove 8. The filter screen 94 is inside the filter box 2 and can filter the liquid passing through. The gas is filtered for impurities, and sealing gaskets 95 are bonded on both sides of the surface of the sealing plate 93. The length of the sealing gasket 95 is the same as the length of the sealing plate 93. The sealing gasket 95 can fit on the surface of the inner wall of the bottom groove 8 after the sealing plate 93 enters the bottom groove 8, thereby improving the sealing performance. The inner wall of the bottom groove 8 is T-shaped, and the shape of the sealing plate 93 is the same as the shape of the inner wall of the bottom groove 8. Therefore, after the sealing plate 93 enters the bottom groove 8, the sealing plate 93 can be inverted on the surface of the inner wall of the bottom groove 8, thereby improving the sealing effect.

[0035] The driving mechanism 20 includes a driving motor 201, a driving rod 202, a threaded sleeve 203, a moving plate 204, a longitudinal rod 205, a sliding sleeve 206 and a limiting assembly 208. The driving motor 201 is bolted to the inside of the top cover 15, the driving rod 202 is rotatably connected to the inner wall of the top cover 15, the threaded sleeve 203 is threadedly connected to the surface of the driving rod 202, the moving plate 204 is bolted to the threaded sleeve 203, the longitudinal rod 205 is bolted to the bottom of the moving plate 204, and the sliding sleeve 206 penetrates the surface of the top of the adjustment box 14. The longitudinal rod 205 is slidably connected to the inner wall of the sliding sleeve 206, and the bottom end of the longitudinal rod 205 is bolted to the adjustment plate 18. The output shaft of the driving motor 201 is connected to the driving rod 202 through a belt transmission. When the driving motor 201 is turned on, its output shaft can drive the driving rods 202 on both sides to rotate through the belt. During the rotation of the driving rod 202, the threaded sleeve 203 on its surface moves downward, and then the threaded sleeve 203 drives the moving plate 204 and the longitudinal rod 205 to descend, and drives the adjustment plate 18 to descend. The adjustment plate 18 is During the descent process, the through hole 17 is gradually blocked to change the exposed area of ​​the through hole 17, thereby finely adjusting the gas flow rate. The limit assembly 208 is composed of a first limit switch 2081, a support plate 2082, and a second limit switch 2083. The first limit switch 2081 is bolted to the top of the inner cavity of the top cover 15, the support plate 2082 is bolted to the bottom of the inner cavity of the top cover 15, and the second limit switch 2083 is bolted to the top of the support plate 2082. The first limit switch 2081 and the second limit switch 2083 are both connected to the drive The driving motor 201 is electrically connected, and when the moving plate 204 moves upward and touches the first limit switch 2081, the driving motor 201 is turned off, and when the moving plate 204 touches the second limit switch 2083 during the descending process, the driving motor 201 is turned off, thereby achieving the effect of limiting the up and down movement range of the moving plate 204. Elastic rings 207 are bonded to the upper and lower sides of the sliding sleeve 206, and the longitudinal rod 205 is slidably connected to the inner ring of the elastic ring 207, which is used to improve the sealing effect of the sliding sleeve 206.

[0036] The support assembly 12 is composed of a vertical plate 121, a horizontal plate 122 and a support block 123. The vertical plates 121 are provided in two groups. The horizontal plate 122 is bolted to the opposite side of the vertical plates 121 on both sides. The support block 123 is bolted to the top of the horizontal plate 122 to support the solenoid valve 11, increase the stability of the solenoid valve 11, and prevent the connecting pipe 10 and the delivery pipe 13 from being bent.

[0037] The inner diameter of the through hole 17 is the same as the inner diameter of the through pipe 19 , and the width of the adjustment plate 18 is greater than the inner diameter of the through hole 17 , so that the adjustment plate 18 can completely cover the through hole 17 to completely seal the through hole 17 .

[0038] A method for controlling gas flow to prevent blockage, the method comprising the following steps:

[0039] Step a: First, the pump body 1 is turned on, and the gas enters through the inlet of the pump body 1, and then enters the filter box 2 through the inlet pipe 7. After the gas enters the filter box 2, it passes through the filter screen 94 in the filter box 2. The filter screen 94 can filter impurities in the gas to prevent the impurities in the gas from wearing the sealing parts of the subsequent valve parts, thereby shortening the service life of the valve parts;

[0040] Step b: Open the solenoid valves 11 at the same time to make the corresponding connecting pipes 10 open. If a large flow needs to be adjusted, more solenoid valves 11 can be opened to make more connecting pipes 10 unobstructed and increase the gas flow. If a small flow needs to be adjusted, only a small number of solenoid valves need to be opened to make a small number of connecting pipes 10 unobstructed and reduce the gas flow. In this process, the effect of roughly adjusting the gas flow is achieved.

[0041] Step c: The gas enters the regulating box 14 through the solenoid valve 11 and the delivery pipe 13, and the driving motor 201 is turned on to drive the driving rod 202 to rotate, so that the moving plate 204 and the longitudinal rod 205 drive the regulating plate 18 to descend, changing the size of the opening of the through hole 17, that is, changing the flow rate of the through hole 17, and realizing fine regulation;

[0042] Step d: After the gas passes through the regulating box 14, the through pipe 19, the junction box 3, the cover 6 and the outlet pipe 4, the gas is regulated and transported;

[0043] Step e: After the conveying work is completed, the hydraulic rod 91 can be opened to shrink its output shaft to drive the connecting plate 92 and the blocking plate 93 to descend, so that the filter screen 94 is placed outside for easy cleaning.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas flow control device for preventing blockage, comprising a pump body (1), a filter box (2) and a junction box (3), characterized in that: A cover shell (6) is provided on one side of the junction box (3), an outlet pipe (4) is provided on the other side of the cover shell (6), an air pressure detection module (5) is fixed on the surface of the outlet pipe (4), an inlet pipe (7) is provided at the outlet of the pump body (1), the other end of the inlet pipe (7) is communicated with the filter box (2), a bottom groove (8) is provided at the bottom of the filter box (2), a filter mechanism (9) is provided inside and at the bottom of the filter box (2), a connecting pipe (10) is provided on the other side of the filter box (2), the other end of the connecting pipe (10) is provided with an electromagnetic valve (11), and the other end of the electromagnetic valve (11) is connected to a connecting pipe (11). A delivery pipe (13) is arranged, a support assembly (12) is arranged on the surface of the solenoid valve (11), the other end of the delivery pipe (13) is connected to a regulating box (14), a top cover (15) is bolted to the top of the regulating box (14), a fixing plate (16) is bolted to the inner wall of the top cover (15), a through hole (17) is opened through the surface of the fixing plate (16), a through pipe (19) is arranged on the other side of the regulating box (14), the other end of the through pipe (19) is connected to the junction box (3), an adjustment plate (18) is slidably arranged on the surface of the fixing plate (16), and a driving mechanism (20) is arranged inside the top cover (15).

2. The anti-clogging gas flow control device according to claim 1, characterized in that: The filtering mechanism (9) comprises a hydraulic rod (91), a connecting plate (92), a blocking plate (93) and a filter net (94); the connecting plate (92) is bolted to the output shaft of the hydraulic rod (91); the blocking plate (93) is bolted to the top of the connecting plate (92); and the filter net (94) is fixed to the top of the blocking plate (93).

3. The anti-clogging gas flow control device according to claim 2, characterized in that: Sealing pads (95) are also bonded to both sides of the surface of the blocking plate (93), and the length of the sealing pad (95) is the same as that of the blocking plate (93).

4. The anti-clogging gas flow control device according to claim 2, characterized in that: The inner wall of the bottom groove (8) is designed in a T-shape, and the shape of the blocking plate (93) is the same as the shape of the inner wall of the bottom groove (8).

5. The anti-clogging gas flow control device according to claim 1, characterized in that: The driving mechanism (20) comprises a driving motor (201), a driving rod (202), a threaded sleeve (203), a movable plate (204), a longitudinal rod (205), a sliding sleeve (206) and a limit assembly (208); the driving motor (201) is bolted to the inside of the top cover (15); the driving rod (202) is rotatably connected to the inner wall of the top cover (15); the threaded sleeve (203) is threadedly connected to the surface of the driving rod (202); the movable plate (204) is bolted to the threaded sleeve (203); the longitudinal rod (205) is bolted to the bottom of the movable plate (204); the sliding sleeve (206) penetrates the surface arranged on the top of the adjustment box (14); the longitudinal rod (205) is slidably connected to the inner wall of the sliding sleeve (206); the bottom end of the longitudinal rod (205) is bolted to the adjustment plate (18); and the output shaft of the driving motor (201) is connected to the driving rod (202) through a belt drive.

6. The anti-clogging gas flow control device according to claim 5, characterized in that: The limit assembly (208) is composed of a first limit switch (2081), a support plate (2082) and a second limit switch (2083); the first limit switch (2081) is bolted to the top of the inner cavity of the top cover (15); the support plate (2082) is bolted to the bottom of the inner cavity of the top cover (15); the second limit switch (2083) is bolted to the top of the support plate (2082); the first limit switch (2081) and the second limit switch (2083) are both electrically connected to the drive motor (201); elastic rings (207) are bonded to the upper and lower sides of the sliding sleeve (206); and the longitudinal rod (205) is slidably connected to the inner ring of the elastic ring (207).

7. The anti-clogging gas flow control device according to claim 1, characterized in that: The support assembly (12) is composed of a vertical plate (121), a horizontal plate (122) and a support block (123). The vertical plates (121) are provided in two groups. The horizontal plates (122) are bolted to opposite sides of the vertical plates (121) on both sides, and the support block (123) is bolted to the top of the horizontal plate (122).

8. The anti-clogging gas flow control device according to claim 1, characterized in that: The inner diameter of the through hole (17) is the same as the inner diameter of the through pipe (19), and the width of the adjustment plate (18) is greater than the inner diameter of the through hole (17).

9. A method for controlling gas flow to prevent blockage, characterized in that: The method comprises the following steps: Step a: firstly, the pump body (1) is turned on, and the gas enters through the inlet of the pump body (1), and then enters the filter box (2) through the inlet pipe (7). After the gas enters the filter box (2), it passes through the filter screen (94) in the filter box (2), and the filter screen (94) can filter impurities in the gas; Step b: Open the solenoid valves (11) at the same time to make the corresponding connecting pipes (10) open. If a large flow rate needs to be adjusted, more solenoid valves (11) can be opened to make more connecting pipes (10) unobstructed and increase the gas flow rate. If a small flow rate needs to be adjusted, only a small number of solenoid valves need to be opened to make a small number of connecting pipes (10) unobstructed and reduce the gas flow rate. In this process, the effect of roughly adjusting the gas flow rate is achieved. Step c: The gas enters the regulating box (14) through the electromagnetic valve (11) and the delivery pipe (13), and the driving motor (201) is turned on to drive the driving rod (202) to rotate, so that the moving plate (204) and the longitudinal rod (205) drive the regulating plate (18) to descend, thereby changing the size of the opening of the through hole (17), that is, changing the flow rate of the through hole (17), and realizing fine regulation; Step d: After the gas passes through the regulating box (14), the through pipe (19), the junction box (3), the cover (6) and the outlet pipe (4), the gas is regulated and transported; Step e: After the conveying work is completed, the hydraulic rod (91) can be opened to shrink the output shaft, thereby driving the connecting plate (92) and the blocking plate (93) to descend, so that the filter screen (94) is placed outside for easy cleaning.

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