A positive pressure anti-blocking flowmeter

Abstract

The present invention discloses a positive pressure anti-blocking flowmeter, which relates to the technical field of flowmeters. After impurities enter the interior of the flowmeter along with the fluid, they are extremely likely to adhere to the key components of the flowmeter, especially the filter screen part. As the impurities continuously accumulate at the filter screen, the pores of the filter screen are gradually blocked, and the resistance of the fluid passing through the filter screen increases significantly, seriously interfering with the continuity and stability of the production process. The present invention can automatically address the problem of impurity blockage through the mutual cooperation of the valve core assembly, the filtering assembly, and the sewage discharge assembly, ensuring the smoothness of the internal water flow. When the internal impurities accumulate and cause an increase in pressure, the sewage discharge assembly can automatically discharge sewage, and during the sewage discharge process, the filter tank can be effectively cleaned through the impact of water flow and the cooperation of components. When necessary, the electric push rod can also be used to assist in enhancing the flushing effect, making the filter tank cleaner, thereby improving the service life of the flowmeter.

Description

Technical Field

[0001] The present invention relates to the technical field of flow meters, and particularly to a positive pressure anti-blocking flow meter. Background Art

[0002] A flow meter is an instrument used to measure the flow rate of a fluid. It can indicate and record the instantaneous flow rate value of the fluid or the cumulative flow rate value of the fluid within a certain time interval. The patent document with the publication number CN117606580A discloses an anti-blocking flow meter. In this anti-blocking flow meter of the invention, the liquid pushes the impeller to rotate the rotating shaft. When the rotating shaft rotates, it drives the scraping shell, the guiding part, and the shielding part to rotate, and conveys the impurities to the collection cavity of the collection shell for collection, thereby preventing the first filtering part from being blocked by impurities and affecting the detection of the flow meter body.

[0003] Therefore, under many working conditions, after impurities enter the interior of the flow meter along with the fluid, they are extremely likely to adhere to the key components of the flow meter, especially the filter screen part. As the impurities continuously accumulate at the filter screen, the pores of the filter screen are gradually blocked, and the resistance of the fluid passing through the filter screen increases significantly. This directly leads to an increase in the internal pressure of the flow meter. On the one hand, it affects the normal transportation of the fluid, causes fluctuations or even interruptions in the flow rate of the system, and seriously interferes with the continuity and stability of the production process.

[0004] In view of the above problems, a positive pressure anti-blocking flow meter is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a positive pressure anti-blocking flow meter, which solves the problem of blockage inside the flow meter in the background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A positive pressure anti-blocking flow meter includes a housing, and flange plates are installed on both sides of the housing;

[0007] A valve core assembly is installed inside the housing. The valve core assembly includes an inner valve housing, which is embedded inside the housing. One side of the inner valve housing is connected to a communication housing, and the communication housing and the inner valve housing are slidably connected. A top cylinder is embedded inside the inner valve housing. A filtering assembly is provided on the top cylinder. The filtering assembly includes a diversion groove. A diversion groove is provided on the top cylinder. A propulsion assembly is embedded inside the top cylinder. An outer chamber is provided between the inner valve housing and the top cylinder. A first inner chamber is provided inside the top cylinder. The first inner chamber and the outer chamber are connected and communicated through the diversion groove. A guiding strip is fixedly connected to the outer surface of the top cylinder, and the guiding strip is arranged on the outer side of the diversion groove;

[0008] A third inner cavity is provided inside the connecting shell. A separation net is embedded inside the third inner cavity. A sewage discharge port and a second inner cavity are also provided on the connecting shell. The second inner cavity is communicated with the first inner cavity. A filtering groove is provided on the connecting shell. The third inner cavity and the second inner cavity are communicated with each other through the filtering groove.

[0009] A sewage discharge component is embedded inside the connecting shell. The sewage discharge component includes an electric push rod. The electric push rod is embedded inside the connecting shell. One end of the electric push rod is connected to the top cylinder. The other end of the electric push rod is connected with a separating sheet. A sealing plate is connected to one side surface of the separating sheet. A connecting tooth is connected to the bottom end of the sealing plate. A transmission rack penetrates through the inside of the separating sheet. The transmission rack is meshed with the connecting tooth. A return spring is also arranged on the transmission rack. The top end of the transmission rack is connected with a feedback rod.

[0010] Preferably, a flap is connected to the other side surface of the separating sheet. The surface of the flap is arranged in an arc shape. Both the sealing plate and the flap are movably connected to the separating sheet through the connecting tooth.

[0011] Preferably, the transmission rack penetrates through the inside of the separating sheet and is meshed with the connecting tooth. The transverse movement of the transmission rack drives the sealing plate and the flap to operate synchronously. An opening is provided at the top end of the separating sheet. The sealing plate is used to cover the opening.

[0012] Preferably, a rotating paddle and a feedback rod are connected to the feedback rod. The rotating paddle is movably sleeved on the feedback rod. An impact plate is arranged on the feedback rod. The impact plate is arranged between two groups of rotating paddles.

[0013] Preferably, the diversion groove provided on the top cylinder is arranged in a dislocation manner with the filtering groove provided on the connecting shell. The inner valve shell and the connecting shell are slidably connected. A waterproof pad is arranged at the position of the top cylinder corresponding to the filtering groove.

[0014] Preferably, a spiral groove is provided on the propulsion component. The propulsion component is rotationally connected to the top cylinder.

[0015] Preferably, the water flow transported into the flange first enters into the outer cavity and then enters into the first inner cavity through the diversion groove. Then it flows through the first inner cavity into the second inner cavity, and then flows through the filtering groove into the third inner cavity, and finally is discharged.

[0016] Preferably, the impurities flowing into the flange along with the water flow enter into the first inner cavity through the outer cavity and the diversion groove. Then the impurities are filtered through the filtering groove. The impurities are stored inside the second inner cavity until the separating sheet and the sealing plate are separated. The impurities flow from the second inner cavity into the sewage discharge port and are discharged.

[0017] Preferably, the isolation sheet and the sealing plate are arranged between the second inner cavity and the sewage outlet, and the isolation sheet and the sealing plate are used to separate the second inner cavity and the sewage outlet.

[0018] Preferably, a return spring is connected to the isolation sheet, and the return spring is fixedly connected to the transmission rack.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] A positive pressure anti-blocking flowmeter provided by the present invention can automatically cope with the problem of impurity blockage through the mutual cooperation of the valve core assembly, the filtering assembly and the sewage discharging assembly, ensuring the smoothness of the internal water flow. When the internal impurities accumulate and cause an increase in pressure, the sewage discharging assembly can automatically discharge sewage, and during the sewage discharging process, the filtering tank can be effectively cleaned through the impact of water flow and the cooperation of components. When necessary, the electric push rod can be used to assist in enhancing the flushing effect, so that the filtering tank is cleaned more thoroughly. In addition, during the sewage discharging process, the design of the flap can prevent impurities from accumulating at the bottom of the isolation sheet, further ensuring the effectiveness of sewage discharging and the long-term stable operation of the equipment, thereby improving the service life of the flowmeter. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the outer shell and the flange of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the top cylinder and the guide bar of the present invention;

[0024] Figure 4 It is a schematic sectional view of the inner valve housing and the communication housing of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the diversion groove and the filtering groove of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the propulsion assembly of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the electric push rod and the sealing plate of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the isolation sheet and the sealing plate in the separated state of the present invention;

[0029] Figure 9 It is a schematic diagram of the structure of the feedback rod and the impact plate of the present invention.

[0030] In the figure: 11, outer shell; 12, flange; 2, valve core assembly; 21, inner valve shell; 22, top cylinder; 23, connecting shell; 24, guide bar; 3, filter assembly; 31, propulsion assembly; 32, diversion groove; 33, first inner cavity; 34, outer cavity; 35, second inner cavity; 36, filter groove; 37, separation net; 38, sewage outlet; 39, third inner cavity; 4, sewage disposal assembly; 41, electric push rod; 42, isolation sheet; 43, sealing plate; 44, connecting teeth; 45, transmission rack; 46, reset spring; 47, flap; 48, impact plate; 49, rotating paddle; 50, feedback rod. Detailed implementation

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] To further understand the content of the present invention, the present invention will be described in detail in conjunction with the accompanying drawings.

[0033] Combined with Figures 1-9 , a positive pressure anti-blocking flowmeter of the present invention includes an outer shell 11, and flanges 12 are installed on both sides of the outer shell 11;

[0034] A valve core assembly 2 is installed inside the outer shell 11. The valve core assembly 2 includes an inner valve shell 21, and the inner valve shell 21 is embedded inside the outer shell 11. One side of the inner valve shell 21 is connected to a connecting shell 23. The connecting shell 23 and the inner valve shell 21 are slidably connected. A top cylinder 22 is embedded inside the inner valve shell 21. The diversion groove 32 opened on the top cylinder 22 is arranged in a dislocation manner with the filter groove 36 opened on the connecting shell 23. The inner valve shell 21 and the connecting shell 23 are slidably connected. A waterproof pad is arranged at the position of the top cylinder 22 corresponding to the filter groove 36. Through the design of the waterproof pad, the tightness between the inner valve shell 21 and the connecting shell 23 is increased, and internal water seepage is prevented. A filter assembly 3 is opened on the top cylinder 22. The filter assembly 3 includes a diversion groove 32. A diversion groove 32 is opened on the top cylinder 22. A propulsion assembly 31 is embedded inside the top cylinder 22. The propulsion assembly 31 is provided with spiral grooves. The propulsion assembly 31 and the top cylinder 22 are rotatably connected. When water flows, it will drive the propulsion assembly 31 to rotate. The rotation of the propulsion assembly 31 can be used to stir and mix the liquid. An outer cavity 34 is arranged between the inner valve shell 21 and the top cylinder 22. A first inner cavity 33 is opened inside the top cylinder 22. The first inner cavity 33 and the outer cavity 34 are connected and communicated through the diversion groove 32. A guide bar 24 is fixedly connected to the outer surface of the top cylinder 22. The guide bar 24 is arranged on the outer side of the diversion groove 32;

[0035] The distance between the top cylinder 22 and the connecting shell 23 can be adjusted. When the top cylinder 22 moves towards the side of the connecting shell 23, the filter slot 36 provided on the top cylinder 22 will be blocked by the covering of the connecting shell 23. At this time, the internal space of the diversion slot 32 becomes smaller. When the diversion slot 32 is completely covered by the connecting shell 23, the flow of water is cut off, achieving the effect of flow interruption.

[0036] To improve the water flow passing rate, through the coordinated action of the valve core assembly 2, the filter assembly 3, and the sewage discharge assembly 4, efficient removal of impurities is achieved, thereby reducing the risk of flow channel blockage and ensuring the smooth flow of the internal fluid. However, traditional flow meters mostly adopt relatively simple anti-blocking solutions, such as regular manual cleaning of the filter screen or setting a simple coarse filtering device at the front end. Among them, regular manual cleaning requires shutdown operations, which are difficult to implement in industrial scenarios with extremely high requirements for production continuity. Moreover, frequent disassembly operations are likely to cause secondary damage to the flow meter, thereby affecting its measurement accuracy and reliability. Although the simple coarse filtering device can intercept some large particle impurities, its filtering effect on fine impurities is limited, and it still cannot fundamentally solve the problem of filter screen blockage.

[0037] Therefore, the development of a positive pressure flow meter that can automatically respond to impurity blockage, maintain a good internal passing rate in real time, and does not require frequent manual intervention is as follows:

[0038] The inside of the connecting shell 23 is provided with a third inner cavity 39. A separation net 37 is embedded in the third inner cavity 39. The connecting shell 23 is also provided with a sewage discharge port 38 and a second inner cavity 35. The second inner cavity 35 is communicated with the first inner cavity 33. The connecting shell 23 is provided with a filter slot 36. The third inner cavity 39 and the second inner cavity 35 are connected through the filter slot 36. The water flow transported into the flange 12 first enters the inside of the outer cavity 34 and then enters the inside of the first inner cavity 33 through the diversion slot 32. Then, it flows through the first inner cavity 33 into the inside of the second inner cavity 35, and then flows through the filter slot 36 into the inside of the third inner cavity 39 and is finally discharged. The impurities flowing into the flange 12 along with the water flow enter the inside of the first inner cavity 33 through the outer cavity 34 and the diversion slot 32. Then, the impurities are filtered through the filter slot 36. The impurities are stored in the second inner cavity 35 until the isolation piece 42 and the sealing plate 43 are separated, and the impurities flow from the second inner cavity 35 into the inside of the sewage discharge port 38 and are discharged;

[0039] After the liquid enters the interior of the inner valve housing 21, regarding the water flow that will ultimately be discharged through the third inner cavity 39, some impurities will be intercepted inside the second inner cavity 35 because they cannot pass through the filter slot 36. As time goes by, a large amount of impurities will accumulate inside the second inner cavity 35. When there are impurities in the filter slot 36, it will affect the flow efficiency of the water flow. If the water supply remains unchanged, the pressure inside the second inner cavity 35 will continuously increase. When the pressure reaches the level for sewage discharge, sewage can be discharged through the sewage discharge component 4. By regularly discharging sewage, the internal smoothness is ensured, and thus the service life of the flowmeter is extended.

[0040] A sewage discharge component 4 is embedded inside the communication housing 23. The sewage discharge component 4 includes an electric push rod 41. The electric push rod 41 is embedded inside the communication housing 23. One end of the electric push rod 41 is connected to the top cylinder 22, and the other end of the electric push rod 41 is connected with a separator plate 42. The separator plate 42 and the sealing plate 43 are arranged between the second inner cavity 35 and the sewage outlet 38. The separator plate 42 and the sealing plate 43 are used to separate the second inner cavity 35 and the sewage outlet 38. A sealing plate 43 is movably connected to one side surface of the separator plate 42 through a hinge shaft. Connecting teeth 44 are connected to both sides of the shaft rod of the sealing plate 43. A transmission rack 45 penetrates through the interior of the separator plate 42, and the transmission rack 45 meshes with the connecting teeth 44. A return spring 46 is connected to the separator plate 42. One end of the return spring 46 is fixed on the separator plate 42, and the other end is connected to the transmission rack 45. The two are elastically connected into a whole through the elastic force;

[0041] When the transmission rack 45 moves horizontally under the action of an external force (such as the impact force of the water flow or the driving force of the electric push rod 41), the return spring 46 will be stretched or compressed to store elastic potential energy. Once the external force disappears, the return spring 46 releases the stored energy and generates a reverse elastic force to push the transmission rack 45 back to its initial position;

[0042] The top end of the transmission rack 45 is connected with a feedback rod 50. A rotating paddle 49 and the feedback rod 50 are connected to the feedback rod 50. An impact plate 48 is arranged on the feedback rod 50. The rotating paddle 49 is movably sleeved on the feedback rod 50. The impact plate 48 is arranged between two groups of rotating paddles 49;

[0043] A flap 47 is connected to the other side surface of the separator plate 42. The surface of the flap 47 is arranged in an arc shape. Both the sealing plate 43 and the flap 47 are movably connected to the separator plate 42 through the connecting teeth 44. The transmission rack 45 penetrates through the interior of the separator plate 42 and meshes with the connecting teeth 44. The horizontal movement of the transmission rack 45 drives the sealing plate 43 and the flap 47 to operate synchronously. An opening is formed at the top end of the separator plate 42, and the sealing plate 43 is used to cover the opening.

[0044] During the use stage, water flow is conveyed through the inner valve housing 21 to the inside of the inner valve housing 21. Subsequently, the water flow is poured into the inside of the first inner cavity 33 through the diversion groove 32. At this time, the propulsion assembly 31 inside the first inner cavity 33 rotates under the flow of the water, and the impurities in the water are agitated during the rotation process to prevent the impurities from sinking to the bottom. When the propulsion assembly 31 rotates and water flow enters the inside of the second inner cavity 35, the water flow can flow into the inside of the third inner cavity 39 through the filter groove 36. Finally, it is discharged through the separation net 37, while the impurities cannot pass through the filter groove 36 and will be blocked inside the second inner cavity 35. Over time, a large amount of impurities will adhere to the inner wall of the filter groove 36, and these impurities will cause the through holes on the filter groove 36 to be blocked. When the water flow passes through the filter groove 36, as the impurities gradually accumulate, the cross-sectional area of the flow channel decreases, and the fluid pressure increases significantly. At this time, the impact force generated by the high-pressure water flow directly acts on the sealing plate 43. When the impact force generated by the water pressure exceeds the elastic threshold of the return spring 46, the sealing plate 43 overcomes the supporting force of the return spring and then separates from the isolation piece 42. This separation action opens the originally sealed channel, creating conditions for the subsequent sewage discharge process. The water flow will quickly drain from the opening position of the diversion groove 32 into the inside of the sewage outlet 38. At this time, the water flow will drain out through the second inner cavity 35 and the filter groove 36 from the sewage outlet 38. During the process of the water flow passing through, the impurities adhering to the inner surface of the filter groove 36 will be washed down by the water flow, which can be used to clean the filter groove 36. After the filter groove 36 is cleaned and the filter holes are washed for a period of time, there are still some impurities that are difficult to wash down. At this time, the electric push rod 41 starts to work. When the electric push rod 41 works, it pulls the top cylinder 22 closer to the communication housing 23. As the top cylinder 22 approaches the communication housing 23, the opening of the diversion groove 32 is blocked by the communication housing 23 and the gap becomes smaller and smaller. At this time, with the water flow rate unchanged, the flow path becomes smaller, and the pressure increases. Then the speed of the water flow is faster, and the flushing effect on the surface of the filter groove 36 is better. The impurities in the filter groove 36 are removed by means of high-pressure flushing to ensure the permeability of the filter groove 36;

[0045] After flushing for a period of time, the inner valve housing 21 continues to contract, pulling the top cylinder 22 until the diversion groove 32 on the top cylinder 22 is completely blocked by the communication housing 23. At this time, the water flow inside the inner valve housing 21 cannot enter the inside of the first inner cavity 33 through the diversion groove 32, thus achieving a cut-off of the flow. When the flow is cut off, the sealing plate 43 that loses the water flow flushing fits with the isolation piece 42 again. In this way, the inner valve housing 21 is opened again. Since the filter groove 36 resumes permeability, the pressure inside the second inner cavity 35 cannot push open the sealing plate 43, and the water flow can pass through the filter groove 36 for filtration again and then be discharged through the third inner cavity 39.

[0046] During the above process of discharging impurities, in order to prevent impurities from accumulating at the bottom end of the isolation sheet 42, while the sealing plate 43 deflects, the flap 47 also deflects accordingly. When the flap 47 deflects and tilts upward, the flap 47 then pushes the impurities accumulated at the bottom end of the sealing plate 43 upward, and they are discharged along with the flow of water.

[0047] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positive pressure anti-blocking flow meter, comprising a housing, characterized in that: Flanges are installed on both sides of the housing; A valve core assembly is installed inside the outer shell, and the valve core assembly includes an inner valve shell, the inner valve shell is embedded in the inner shell, a connecting shell is connected to one side of the inner valve shell, the connecting shell and the inner valve shell are slidably connected, a top cylinder is embedded inside the inner valve shell, a filter assembly is provided on the top cylinder, the filter assembly includes a guide groove, a guide groove is provided on the top cylinder, an outer chamber is provided between the inner valve shell and the top cylinder, a first inner chamber is provided inside the top cylinder, the first inner chamber and the outer chamber are connected through the guide groove, a guide strip is fixedly connected to the outer surface of the top cylinder, and the guide strip is provided on the outer side of the guide groove; A third inner chamber is provided inside the connecting shell, a separation net is embedded inside the third inner chamber, a sewage outlet and a second inner chamber are provided on the connecting shell, the second inner chamber is connected to the first inner chamber, a filter tank is provided on the connecting shell, and the third inner chamber and the second inner chamber are connected through the filter tank; A sewage discharge assembly is embedded in the connecting shell, and the sewage discharge assembly includes an electric push rod. The connecting shell is embedded in the electric push rod, one end of the electric push rod is connected to the top cylinder, and the other end of the electric push rod is connected to a spacer, a sealing plate is connected to one side of the spacer, and a connecting tooth is connected to the bottom end of the sealing plate. A transmission rack runs through the interior of the spacer, and the transmission rack is meshed with the connecting tooth. A reset spring is also provided on the transmission rack, and a feedback rod is connected to the top of the transmission rack; A flap is connected to the other side of the isolation plate, the surface of the flap is arranged in an arc shape, and the sealing plate and the flap are movably connected to the isolation plate through connecting teeth; The transmission rack runs through the interior of the isolation plate and meshes with the connecting teeth. The transmission rack moves laterally to drive the sealing plate and the flap to operate synchronously. An opening is provided at the top of the isolation plate, and the sealing plate is used to cover the opening. The isolation sheet and the sealing plate are arranged between the second inner chamber and the sewage outlet, and are used to separate the second inner chamber and the sewage outlet. A return spring is connected to the isolation sheet, and the return spring and the transmission rack are fixedly connected together.

2. A positive pressure anti-blocking flowmeter according to claim 1, characterized in that: The feedback rod is connected with a rotating paddle and a feedback rod, the rotating paddle is movably sleeved on the feedback rod, an impact plate is arranged on the feedback rod, and the impact plate is arranged between the two groups of rotating paddles.

3. A positive pressure anti-blocking flowmeter according to claim 1, characterized in that: The guide groove on the top cylinder and the filter groove on the connecting shell are arranged in a staggered manner, the inner valve shell and the connecting shell are slidably connected, and a waterproof pad is arranged at a position of the top cylinder corresponding to the filter groove.

4. A positive pressure anti-blocking flowmeter according to claim 1, characterized in that: A propulsion assembly is embedded in the interior of the top cylinder, a spiral groove is arranged on the propulsion assembly, and the propulsion assembly and the top cylinder are rotatably connected.

5. The positive pressure anti-clogging flowmeter according to claim 1, characterized in that: The water flow transported to the interior of the flange first enters the interior of the outer chamber and then enters the interior of the first inner chamber through the guide groove, then flows through the first inner chamber to the interior of the second inner chamber, then flows through the filter groove to the interior of the third inner chamber, and finally is discharged.

6. A positive pressure anti-blocking flowmeter according to claim 1, characterized in that: Impurities that flow into the interior of the flange along with the water flow enter the interior of the first inner chamber through the outer chamber and the guide groove, and are then filtered through the filter groove. The impurities are stored in the interior of the second inner chamber until the isolation plate and the sealing plate are separated, and the impurities flow from the second inner chamber to the interior of the drain outlet for discharge.

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