Gear flowmeter

Abstract

The invention relates to the technical field of flow meters, in particular to a gear flow meter which comprises a flow meter shell, a first gear and a second gear. The flow meter further comprises an automatic opening mechanism and a telescopic mechanism, an auxiliary flow branch is arranged in the flow meter shell, the two ends of the auxiliary flow branch are communicated with the liquid inlet and the liquid outlet respectively, the automatic opening mechanism is located between the liquid inlet and the auxiliary flow branch, and a partition plate used for separating the metering space and the auxiliary flow branch is connected into the flow meter shell in a sealed mode. One side of the partition plate is connected with the first gear or the second gear, and the other side of the partition plate is connected with the output end of the telescopic mechanism. By arranging the auxiliary flow branch and the automatic opening mechanism, when impurities enter the flow meter to block the flow meter, liquid flows into downstream equipment through the auxiliary flow branch, and the downstream equipment can still work normally; and by arranging the telescopic mechanism, the first gear and the second gear are separated for washing after impurities enter, so that the gear flow meter can recover to work again.

Description

Technical Field

[0001] This invention relates to the technical field of flow meters, and more specifically, to a gear flow meter. Background Technology

[0002] In the field of industrial fluid measurement and control, gear flow meters, as a common volumetric flow metering device, are widely used in industries such as petroleum, chemical, and pharmaceutical to accurately measure the volumetric flow rate of fluids in closed pipelines. Their working principle primarily relies on the fluid driving a pair of meshing gears to rotate, and the fluid volume is calculated by detecting the number of gear rotations. This type of instrument has advantages such as compact structure, high measurement accuracy, and fast response speed.

[0003] However, in actual operation, gear flow meters often face the problem of impurity intrusion due to the possibility that the fluid medium itself may contain solid particulate contaminants, or foreign impurities may be introduced into the pipeline system due to corrosion, aging seals, or other reasons. These impurities, once inside the flow meter along with the fluid, easily accumulate in the gear meshing clearance, bearing areas, or narrow flow channels of the measuring chamber, causing localized blockages. Once a blockage occurs, it not only significantly reduces fluid flow, preventing it from flowing normally to subsequent pipelines and equipment, but also causes problems such as flow meter reading deviations, gear jamming, and even damage.

[0004] More seriously, since gear flow meters are typically installed at critical nodes in process pipelines, blockages can further lead to interruptions in material supply or abnormal pressure in downstream equipment, hindering the operation of the entire system and severely impacting the continuity and stability of the production process. Although mitigation measures such as installing filtration devices exist, the filters themselves require regular cleaning or replacement, and they increase system resistance and maintenance costs. Under certain operating conditions, they still cannot completely eliminate the operational risks caused by impurities entering the system. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing gear flow meters where impurities can enter and cause blockages, affecting the normal operation of downstream equipment. This invention provides a gear flow meter that allows downstream equipment to continue to operate normally even when impurities enter and cause blockages.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A gear flow meter is provided, comprising a flow meter housing with a metering space and a first gear and a second gear located within the metering space. The flow meter housing has an inlet and an outlet communicating with the metering space. The first gear and the second gear are rotatably connected to the flow meter housing and are meshed together. The flow meter housing also includes an automatic opening mechanism and a telescopic mechanism. An auxiliary flow branch is provided within the flow meter housing, with its two ends communicating with the inlet and the outlet, respectively. The automatic opening mechanism is located between the inlet and the auxiliary flow branch. A partition for separating the metering space and the auxiliary flow branch is sealed within the flow meter housing. One side of the partition is connected to the first gear or the second gear, and the other side of the partition is connected to the output end of the telescopic mechanism.

[0008] In normal operation, the gear flow meter of this invention allows fluid to enter the flow meter housing through the inlet, pass through the first and second gears, and rotate to measure the flow rate. When impurities enter, the first and second gears become blocked and cannot rotate, increasing the pressure at the inlet of the flow meter housing. The automatic opening mechanism opens under this pressure, connecting the inlet to the auxiliary flow path. Liquid then flows from the inlet through the auxiliary flow path to the outlet and downstream equipment, ensuring that downstream equipment can still operate normally even when blocked by impurities. At this time, the telescopic mechanism is activated, causing the first or second gear to move up and down, separating the first and second gears. Liquid flows through the gap between the first and second gears, flushing them and removing impurities. The impurities are then flushed out of the outlet. The telescopic mechanism retracts, resetting the first and second gears. If the first and second gears are functioning normally, the pressure at the inlet decreases, the automatic opening mechanism resets, and the flow meter resumes normal operation. By setting up an auxiliary flow branch and an automatic opening mechanism, when impurities enter and clog the flow meter, the liquid flows into the downstream equipment through the auxiliary flow branch, and the downstream equipment can still work normally; by setting up a telescopic mechanism, the first gear and the second gear are separated and flushed after impurities enter, so that the gear flow meter can resume operation.

[0009] Furthermore, the auxiliary flow branch includes an inlet section, an auxiliary flow section, and an outlet section. The baffle is located between the metering space and the auxiliary flow section. The inlet, the inlet section, the auxiliary flow section, the outlet section, and the outlet are sequentially connected. The automatic opening mechanism is located in the inlet section. When the automatic opening mechanism is activated, the inlet section is connected to the auxiliary flow section. The telescopic mechanism is at least partially located within the auxiliary flow section. When impurities enter and clog the flow meter, the pressure at the inlet increases, the automatic opening mechanism is activated, and the liquid flows through the auxiliary flow section to the outlet. The telescopic mechanism activates, driving the first or second gear and the baffle to move, moving the first or second gear to the auxiliary flow section. The liquid enters the metering section and the auxiliary flow section to clean the first and second gears respectively.

[0010] Furthermore, the axis of the inlet section is perpendicular to the axis of the inlet, and the movement direction of the automatic opening mechanism is parallel to the axis of the inlet section. The automatic opening mechanism includes a first guide shell, a first sliding assembly, a sealing element, and a first elastic reset element. The first guide shell is disposed on the flowmeter housing, the first sliding assembly is slidably connected to the first guide shell, the sealing element is disposed on the first sliding assembly, the sealing element is located in the inlet section, the inlet section is provided with a sealing mating block, the sealing mating block has an auxiliary flow port, and the inlet is connected to the inlet section through the auxiliary flow port. The inlet section is connected to the auxiliary flow section. The top plane of the sealing block coincides with the bottom plane of the first gear and the second gear. The sealing element includes a contact block and an arc-shaped sealing block connected in sequence. The contact block is connected to the first sliding assembly and abuts against the sealing block. The arc-shaped sealing block is located inside the auxiliary flow port and seals against the auxiliary flow port. When the sealing element moves away from the inlet, the inlet section is connected to the auxiliary flow section. The two ends of the first elastic reset member abut against the first sliding assembly and the first guide shell, respectively. When the pressure increases, the sealing element compresses the first elastic reset member, causing the first sliding assembly to slide within the first guide shell, thus connecting the inlet section and the auxiliary flow section.

[0011] Furthermore, the automatic opening mechanism also includes an adjusting screw. The first guide housing has a receiving cavity, and the first elastic reset member is located within the receiving cavity. The adjusting screw is threadedly connected to the first guide housing, and its other end is slidably connected to the receiving cavity. Both ends of the first elastic reset member are respectively connected to the first sliding assembly and the adjusting screw. By setting the adjusting screw, the initial compression degree of the first elastic reset member can be adjusted, thereby facilitating the adjustment of the opening pressure according to the actual liquid used.

[0012] Further, the partition includes a fixed partition, a first movable partition, a second movable partition, and a third movable partition. The fixed partition is disposed within the flowmeter housing. The first, second, and third movable partitions are all slidably connected to the fixed partition in a sealed manner. The first gear is rotatably connected to the first movable partition in a sealed manner, and the second gear is rotatably connected to the second movable partition in a sealed manner. The third movable partition is located between the first and second movable partitions. The total outer diameter of the first and third movable partitions is not less than the outer diameter of the first gear, and the total outer diameter of the second and third movable partitions is not less than the outer diameter of the second gear. It also includes a limiting device. The system comprises two sets of limiting components and two sets of telescopic mechanisms. The output ends of the two sets of telescopic mechanisms are respectively connected to the first movable partition and the second movable partition. One set of limiting components is located between the first gear and the first movable partition, and the other set of limiting components is located between the second gear and the second movable partition. The system also includes a controller electrically connected to the limiting components. Furthermore, it includes a telescopic support assembly, the two ends of which are respectively connected to the flowmeter housing and the third movable partition. When the telescopic mechanism drives the first or second movable partition to move, the first or second movable partition drives the third movable partition to move. During normal operation, the gear rotates relative to the movable partition, and the partition separates the metering space and the auxiliary flow section to avoid affecting metering. When cleaning the gear is required, the controller activates the limiting components to fix the movable partition relative to the gear. The telescopic mechanism then drives the gear through the movable partition to move into the auxiliary flow section, separating the first and second gears for cleaning.

[0013] Furthermore, both the first gear and the second gear are connected to a rotating rod. Both gears are rotatably connected to the two movable partitions via the rotating rods. The limiting assembly includes a miniature telescopic component and a friction plate. The miniature telescopic component is disposed within the movable partition, and the friction plate is connected to the output end of the miniature telescopic component. The friction plate is located between the rotating rod and the movable partition. The controller is electrically connected to the miniature telescopic component. When gear cleaning is required, the controller activates the miniature telescopic component, and the friction plate abuts against the rotating rod, fixing the movable partition and gear relatively to each other. This allows the telescopic mechanism to drive the gear to perform only telescopic movement via the movable partition, preventing gear rotation.

[0014] Furthermore, the telescopic mechanism includes a second guide shell, a second sliding assembly, and a telescopic drive. The second guide shell is disposed on the flow meter housing. One end of the second sliding assembly is slidably connected to the second guide shell, and the other end of the second sliding assembly is connected to the movable partition. The second sliding assembly is at least partially located within the auxiliary flow section. The telescopic drive is connected to the second guide shell, and the output end of the telescopic drive is connected to the second sliding assembly. When cleaning is required, the telescopic drive is activated to drive the second sliding assembly to slide in the second guide shell, which in turn drives one of the gears to move into the auxiliary flow section via the movable partition.

[0015] Furthermore, the telescopic drive component is configured as an electric telescopic rod, which is mounted on the second guide shell. The output end of the electric telescopic rod is connected to the second sliding assembly, and the electric telescopic rod is electrically connected to the controller. The controller controls the movement of the electric telescopic rod, which in turn drives the gears to move up and down.

[0016] Furthermore, the telescopic drive component is configured as a turbine blade, which is rotatably connected to the second guide shell. The turbine blade is located within the auxiliary flow section and is threadedly connected to the second sliding assembly. It also includes a second elastic reset component, with its two ends connected to the turbine blade and the second sliding assembly, respectively. When liquid enters the auxiliary flow section, the liquid flow drives the turbine blade to rotate, which in turn drives the second sliding assembly to move, causing the gear to move into the auxiliary flow section and flush the gear. At this time, the liquid can simultaneously pass through the metering space and the auxiliary flow section, reducing the pressure at the inlet. This causes the automatic opening mechanism to reset, reducing the liquid flow rate within the auxiliary flow section, and the second elastic reset component drives the gear to reset.

[0017] Furthermore, the third movable partition has a first groove and a second groove on the side near the metering space. The first movable partition has a first protrusion located within the first groove, and the second movable partition has a second protrusion located within the second groove. The telescopic support assembly includes a third guide shell, a third sliding assembly, and a second elastic reset member. The third guide shell is disposed on the flow meter housing. One end of the third sliding assembly is connected to the third movable partition, and the other end is slidably connected to the third guide shell. The second elastic reset member is located within the third guide shell, and its two ends are respectively connected to the third sliding assembly and the third guide shell. When the telescopic mechanism moves the first movable partition, the first protrusion moves the third movable partition, and the third sliding assembly slides within the third guide shell, compressing the second elastic reset member. After cleaning, the telescopic mechanism resets the first movable partition, and the second elastic reset member resets the third movable partition.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. A gear flow meter of the present invention, by setting an auxiliary flow branch and an automatic opening mechanism, when impurities enter and block the flow meter, the liquid flows into the downstream equipment through the auxiliary flow branch, and the downstream equipment can still work normally; by setting a telescopic mechanism, after impurities enter, the first gear and the second gear are separated for flushing, so that the gear flow meter can resume working.

[0019] 2. A gear flow meter of the present invention avoids accidental opening of the automatic opening mechanism by making the opening direction of the automatic opening mechanism perpendicular to the normal flow direction of the liquid.

[0020] 3. A gear flow meter of the present invention, by setting turbine blades and a second elastic reset member, when liquid enters the auxiliary flow section, the flow of liquid drives the turbine blades to rotate, the turbine blades drive the second sliding component to move, and drive the gear to move into the auxiliary flow section to flush the gear; at this time, the liquid can pass through the metering space and the auxiliary flow section at the same time, the pressure at the liquid inlet decreases, the automatic opening mechanism gradually resets, the liquid flow in the auxiliary flow section decreases, and the second elastic reset member drives the gear to reset. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the gear flow meter of the present invention; Figure 2 This is a schematic diagram of the internal structure of the gear flow meter of the present invention; Figure 3 yes Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 yes Figure 2 Enlarged view of the structure at point B; Figure 5 This is a schematic diagram of the internal structure of the gear flow meter in Embodiment 3; Figure 6 yes Figure 5 Enlarged view of the structure at point C; Figure 7 This is a schematic diagram of the internal structure of the gear flow meter in Example 4.

[0022] In the attached diagram: 100, flow meter housing; 110, inlet; 120, outlet; 130, inlet section; 131, sealing block; 140, auxiliary flow section; 150, outlet section; 160, partition; 161, fixed partition; 162, first movable partition; 163, second movable partition; 164, third movable partition; 200, first gear; 210, rotating rod; 300, second gear; 400, automatic opening mechanism; 410, first guide shell; 411, receiving cavity; 420. 430. First sliding assembly; 431. Sealing component; 432. Abutment block; 440. Arc-shaped sealing block; 450. First elastic reset component; 500. Adjusting screw; 510. Telescopic mechanism; 520. Second guide shell; 520. Second sliding assembly; 530. Telescopic drive component; 600. Limiting assembly; 610. Miniature telescopic component; 620. Friction plate; 700. Controller; 800. Telescopic support assembly; 810. Third guide shell; 820. Third sliding assembly; 830. Second elastic reset component. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams only, not actual pictures, and should not be construed as limiting this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0024] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. Furthermore, if the embodiments of the present invention involve descriptions such as "first" and "second," these descriptions are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In addition, the meaning of "and / or" in the text is that it includes three parallel options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0025] Example 1 This embodiment is a first embodiment of a gear flow meter, such as... Figure 1 and Figure 2 As shown, the flowmeter includes a flowmeter housing 100 with a metering space and a first gear 200 and a second gear 300 located within the metering space. The flowmeter housing 100 has an inlet 110 and an outlet 120 communicating with the metering space. The first gear 200 and the second gear 300 are rotatably connected to the flowmeter housing 100 and are meshed together. The flowmeter housing 100 also includes an automatic opening mechanism 400 and a telescopic mechanism 500. An auxiliary flow branch is provided inside the flowmeter housing 100, with both ends of the auxiliary flow branch communicating with the inlet 110 and the outlet 120, respectively. The automatic opening mechanism 400 is located between the inlet 110 and the auxiliary flow branch. A partition 160 is sealed inside the flowmeter housing 100 to separate the metering space and the auxiliary flow branch. One side of the partition 160 is connected to either the first gear 200 or the second gear 300, and the other side of the partition 160 is connected to the output end of the telescopic mechanism 500. A metering module is installed on the flow meter housing 100. The metering module is connected to the first gear 200 and the second gear 300, and is electrically connected to the controller 700. The metering module is the same module found in existing gear flow meters and is capable of measuring liquid flow rate normally.

[0026] The auxiliary flow branch includes an inlet section 130, an auxiliary flow section 140, and an outlet section 150. A baffle 160 is located between the metering space and the auxiliary flow section 140. The inlet port 110, the inlet section 130, the auxiliary flow section 140, the outlet section 150, and the outlet port 120 are connected in sequence. An automatic opening mechanism 400 is located in the inlet section 130. When the automatic opening mechanism 400 is opened, the inlet section 130 is connected to the auxiliary flow section 140. The telescopic mechanism 500 is at least partially located within the auxiliary flow section 140. When impurities enter and clog the flow meter, the pressure at the inlet 110 increases, and the automatic opening mechanism 400 opens, allowing the liquid to flow through the auxiliary flow section 140 to the outlet 120. The telescopic mechanism 500 is activated, driving the first gear 200 or the second gear 300 and the partition 160 to move, moving the first gear 200 or the second gear 300 to the auxiliary flow section 140. The liquid enters the metering section 141 and the auxiliary flow section 140 to clean the first gear 200 and the second gear 300 respectively.

[0027] In this embodiment, a pressure sensor, an alarm, and a controller 700 may also be provided. The pressure sensor is located at the liquid inlet 110, and both the pressure sensor and the alarm are electrically connected to the controller 700. The pressure sensor detects the pressure at the liquid inlet 110. When the pressure exceeds a set value, the controller 700 controls the alarm to sound. The controller 700 can also assist in controlling the automatic opening mechanism 400 to open and the telescopic mechanism 500 to start.

[0028] The working principle of a gear flow meter in this embodiment is as follows: During normal operation, fluid enters the flowmeter housing 100 through the inlet 110, passes through the first gear 200 and the second gear 300, causing them to rotate and measuring the flow rate. When impurities enter, the first gear 200 and the second gear 300 become blocked and cannot rotate, increasing the pressure at the inlet 110 of the flowmeter housing 100. Under this pressure, the automatic opening mechanism 400 opens, connecting the inlet 110 to the auxiliary flow branch. Liquid enters through the inlet 110 and flows through the auxiliary flow branch to the outlet 120, flowing downstream to the equipment. This ensures that the downstream equipment can still operate normally even when impurities cause blockage. At this time, the telescopic mechanism 500 is activated, driving the first gear 200 or the second gear 300 to move up and down, separating the first gear 200 and the second gear 300. Liquid flows through the gap between the first gear 200 and the second gear 300, flushing them and removing impurities. The impurities are flushed out from the outlet 120. The telescopic mechanism 500 is then retracted, resetting the first gear 200 and the second gear 300. If the first gear 200 and the second gear 300 are functioning normally, the pressure at the inlet 110 decreases, the automatic opening mechanism 400 resets, and the flow meter resumes normal operation. By setting up an auxiliary flow branch and an automatic opening mechanism 400, when impurities enter and clog the flow meter, the liquid flows into downstream equipment through the auxiliary flow branch, allowing the downstream equipment to continue operating normally. The telescopic mechanism 500 separates the first gear 200 and the second gear 300 for flushing after impurities enter, enabling the gear flow meter to resume operation.

[0029] Example 2 This embodiment is the second embodiment of the gear flow meter. This embodiment is similar to the first embodiment, except that, as shown in the example... Figure 2 As shown, the axis of the inlet section 130 is perpendicular to the axis of the inlet port 110, and the movement direction of the automatic opening mechanism 400 is parallel to the axis of the inlet section 130. This prevents the automatic opening mechanism 400 from accidentally opening when the flow meter is working normally.

[0030] The automatic opening mechanism 400 includes a first guide shell 410, a first sliding assembly 420, a sealing member 430, and a first elastic reset member 440. The first guide shell 410 is disposed on the flowmeter housing 100. The first sliding assembly 420 is slidably connected to the first guide shell 410. The sealing member 430 is disposed on the first sliding assembly 420 and is located in the liquid inlet section 130. The liquid inlet section 130 is provided with a sealing mating block 131. The sealing mating block 131 has an auxiliary flow port. The liquid inlet 110 communicates with the liquid inlet section 130 through the auxiliary flow port. The top plane of the sealing mating block 131 coincides with the bottom plane of the first gear 200 and the second gear 300. Figure 3As shown, the sealing component 430 includes an abutment block 431 and an arc-shaped sealing block 432 connected in sequence. The abutment block 431 is connected to the first sliding assembly 420 and abuts against the sealing mating block 131. The arc-shaped sealing block 432 is located inside the auxiliary flow port and is in sealed contact with the auxiliary flow port. When the sealing component 430 moves away from the liquid inlet 110, the liquid inlet section 130 communicates with the auxiliary flow section 140. The two ends of the first elastic reset component 440 abut against the first sliding assembly 420 and the first guide shell 410, respectively. The arc-shaped sealing block 432 seals against the auxiliary flow port to prevent liquid from entering the auxiliary flow branch during normal operation. When the pressure increases, the sealing component 430 compresses the first elastic reset component 440, causing the first sliding assembly 420 to slide within the first guide shell 410, and the liquid inlet section 130 communicates with the auxiliary flow section 140. Specifically, the sealing block 131 is designed as a ring, and the outer wall of the sealing block 131 is sealed and fixedly connected to the liquid inlet section 130. The middle part of the sealing block 131 is the auxiliary flow port. The arc-shaped sealing block 432 is designed as a hemisphere, and the maximum outer diameter of the arc-shaped sealing block 432 is equal to the inner diameter of the auxiliary flow port.

[0031] like Figure 4 As shown, the automatic opening mechanism 400 also includes an adjusting screw 450. A receiving cavity 411 is provided inside the first guide housing 410, and a first elastic reset member 440 is located within the receiving cavity 411. One end of the adjusting screw 450 is threadedly connected to the first guide housing 410, and the other end is slidably connected to the receiving cavity 411. Both ends of the first elastic reset member 440 are respectively connected to the first sliding assembly 420 and the adjusting screw 450. By setting the adjusting screw 450, the initial compression degree of the first elastic reset member 440 can be adjusted, thereby facilitating the adjustment of the opening pressure according to the actual liquid used.

[0032] Example 3 This embodiment is the third embodiment of the gear flow meter. This embodiment is similar to the first embodiment, except that, as Figure 5As shown, the partition 160 includes a fixed partition 161, a first movable partition 162, a second movable partition 163, and a third movable partition 164. The fixed partition 161 is disposed inside the flowmeter housing 100. The first movable partition 162, the second movable partition 163, and the third movable partition 164 are all slidably connected to the fixed partition 161. The first gear 200 is rotatably connected to the first movable partition 162, the second gear 300 is rotatably connected to the second movable partition 163, and the third movable partition 164 is located between the first movable partition 162 and the second movable partition 163. The total outer diameter of the first movable partition 162 and the third movable partition 164 is not less than the outer diameter of the first gear 200, and the total outer diameter of the second movable partition 163 and the third movable partition 164 is not less than the outer diameter of the second gear 300. It also includes a limiting device. The component 600, the limiting component 600, and the telescopic mechanism 500 are all provided in two sets. The output ends of the two sets of telescopic mechanisms 500 are respectively connected to the first movable partition 162 and the second movable partition 163. One set of limiting components 600 is located between the first gear 200 and the first movable partition 162, and the other set of limiting components 600 is located between the second gear 300 and the second movable partition 163. The component also includes a controller 700, which is electrically connected to the limiting component 600. The component also includes a telescopic support component 800, whose two ends are respectively connected to the flowmeter housing 100 and the third movable partition 164. When the telescopic mechanism 500 drives the first movable partition 162 or the second movable partition 163 to move, the first movable partition 162 or the second movable partition 163 drives the third movable partition 164 to move. During normal operation, the gear rotates relative to the movable partition 160, which separates the metering space and the auxiliary flow section 140 to avoid affecting the metering. When the gear needs to be cleaned, the controller 700 controls the limit assembly 600 to start, fixing the first movable partition 162 relative to the first gear 200 or the second movable partition 163 relative to the second gear 300. The telescopic mechanism 500 drives the gear to move into the auxiliary flow section 140 through the movable partition, separating the first gear 200 and the second gear 300 for cleaning.

[0033] Specifically, such as Figure 6As shown, both the first gear 200 and the second gear 300 are connected to a rotating rod 210. Both gears 200 and 300 are rotatably connected to two movable partitions 162 via the rotating rod 210. The limiting assembly 600 includes a miniature telescopic component 610 and a friction plate 620. The miniature telescopic component 610 is disposed within the movable partition 162, and the friction plate 620 is connected to the output end of the miniature telescopic component 610. The friction plate 620 is located between the rotating rod 210 and the movable partition 162. The controller is electrically connected to the miniature telescopic component 610. When gear cleaning is required, the controller activates the miniature telescopic component 610, and the friction plate 620 abuts against the rotating rod 210, fixing the movable partitions and gears relative to each other. This allows the telescopic mechanism to drive the gears through the movable partitions to perform only telescopic movements, preventing gear rotation. The rotating rod 210 has a groove for the friction plate 620 to abut against it.

[0034] like Figure 5 As shown, the telescopic mechanism 500 includes a second guide shell 510, a second sliding assembly 520, and a telescopic drive member 530. The second guide shell 510 is disposed on the flow meter housing 100. One end of the second sliding assembly 520 is slidably connected to the second guide shell 510, and the other end of the second sliding assembly 520 is connected to the movable partition 162. The second sliding assembly 520 is at least partially located within the auxiliary flow section 140. The telescopic drive member 530 is connected to the second guide shell 510, and its output end is connected to the second sliding assembly 520. When cleaning is required, the telescopic drive member 530 is activated, causing the second sliding assembly 520 to slide within the second guide shell 510. This movement, via the movable partition 162, drives one of the gears to move into the auxiliary flow section 140.

[0035] The telescopic drive component 530 is an electric telescopic rod, which is mounted on the second guide housing 510. The output end of the electric telescopic rod is connected to the second sliding assembly 520, and the electric telescopic rod is electrically connected to the controller 700. The controller controls the movement of the electric telescopic rod, which in turn drives the gears to move up and down.

[0036] The third movable partition 164 has a first groove and a second groove on the side near the metering space. The first movable partition 162 has a first protrusion located in the first groove, and the second movable partition 163 has a second protrusion located in the second groove. The telescopic support assembly 800 includes a third guide shell 810, a third sliding assembly 820, and a second elastic reset member 830. The third guide shell 810 is disposed on the flowmeter housing 100. One end of the third sliding assembly 820 is connected to the third movable partition 164, and the other end is slidably connected to the third guide shell 810. The second elastic reset member 830 is located inside the third guide shell 810, and both ends of the second elastic reset member 830 are connected to the third sliding assembly 820 and the third guide shell 810, respectively. When the telescopic mechanism 500 drives the first movable partition 162 to move, the first protrusion drives the third movable partition 164 to move, and the third sliding assembly 820 slides inside the third guide shell 810, compressing the second elastic reset member 830. After cleaning is completed, the telescopic mechanism 500 drives the first movable partition 162 to reset, and the second elastic reset member 830 drives the third movable partition 164 to reset. The movement of the second movable partition 163 is similar to the movement of the first movable partition 162.

[0037] Example 4 This embodiment is the fourth embodiment of the gear flow meter. This embodiment is similar to embodiment three, except that, as... Figure 7 As shown, the telescopic drive component 530 is configured as a turbine blade, which is rotatably connected to the second guide shell 510. The turbine blade is located in the auxiliary flow section 140 and is threadedly connected to the second sliding assembly 520. It also includes a second elastic reset component, the two ends of which are respectively connected to the turbine blade and the second sliding assembly 520.

[0038] After the gear jams, the controller 700 activates the miniature telescopic component 610 to extend the friction plate 620 and abut against the second sliding assembly 520, fixing the gear's position. After the liquid enters the auxiliary flow section 140, the liquid flow drives the turbine blades to rotate. The turbine blades drive the second sliding assembly 520 to move, moving the gear into the auxiliary flow section 140 to flush it. At this time, the liquid can simultaneously pass through the metering space and the auxiliary flow section 140. The pressure at the inlet 110 decreases, the automatic opening mechanism 400 resets, the liquid flow rate in the auxiliary flow section 140 decreases, and the second elastic reset component drives the gear to reset. Specifically, the second elastic reset component can be a spring or a torsion spring. When the second elastic reset component is a spring, both ends of the spring abut against the turbine blades and the movable partition 162, respectively. When the second elastic reset component is a torsion spring, both ends of the torsion spring are connected to the turbine blades and the second sliding assembly 520, respectively.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A gear flow meter, comprising a flow meter housing (100) having a metering space and a first gear (200) and a second gear (300) located within the metering space, the flow meter housing (100) having an inlet (110) and an outlet (120) communicating with the metering space, the first gear (200) and the second gear (300) being rotatably connected to the flow meter housing (100), and the first gear (200) and the second gear (300) being meshed together; characterized in that, It also includes an automatic opening mechanism (400) and a telescopic mechanism (500). The flow meter housing (100) is provided with an auxiliary flow branch. The two ends of the auxiliary flow branch are respectively connected to the inlet (110) and the outlet (120). The automatic opening mechanism (400) is located between the inlet (110) and the auxiliary flow branch. The flow meter housing (100) is sealed with a partition (160) for separating the metering space and the auxiliary flow branch. One side of the partition (160) is connected to the first gear (200) or the second gear (300), and the other side of the partition (160) is connected to the output end of the telescopic mechanism (500).

2. The gear flow meter according to claim 1, characterized in that, The auxiliary flow branch includes an inlet section (130), an auxiliary flow section (140), and an outlet section (150). The partition (160) is located between the metering space and the auxiliary flow section (140). The inlet port (110), the inlet section (130), the auxiliary flow section (140), the outlet section (150), and the outlet port (120) are connected in sequence. The automatic opening mechanism (400) is located in the inlet section (130). When the automatic opening mechanism (400) is opened, the inlet section (130) is connected to the auxiliary flow section (140). The telescopic mechanism (500) is at least partially located within the auxiliary flow section (140).

3. The gear flow meter according to claim 2, characterized in that, The axis of the inlet section (130) is perpendicular to the axis of the inlet port (110), and the movement direction of the automatic opening mechanism (400) is parallel to the axis of the inlet section (130). The automatic opening mechanism (400) includes a first guide shell (410), a first sliding assembly (420), a sealing member (430), and a first elastic reset member (440). The first guide shell (410) is disposed on the flow meter housing (100), the first sliding assembly (420) is slidably connected to the first guide shell (410), the sealing member (430) is disposed on the first sliding assembly (420), the sealing member (430) is located in the inlet section (130), the inlet section (130) is provided with a sealing mating block (131), the sealing mating block (131) has an auxiliary flow port, and the inlet port (110) is connected to the inlet section (130) through the auxiliary flow port. The liquid section (130) is connected, and the top plane of the sealing block (131) coincides with the bottom plane of the first gear (200) and the second gear (300). The sealing member (430) includes an abutment block (431) and an arc-shaped sealing block (432) connected in sequence. The abutment block (431) is connected to the first sliding component (420), and the abutment block (431) abuts against the sealing block (131). The arc-shaped sealing block (432) is located in the auxiliary flow port, and the arc-shaped sealing block (432) seals against the auxiliary flow port. When the sealing member (430) moves away from the liquid inlet (110), the liquid inlet section (130) is connected to the auxiliary flow section (140). The two ends of the first elastic reset member (440) abut against the first sliding component (420) and the first guide shell (410) respectively.

4. The gear flow meter according to claim 3, characterized in that, The automatic opening mechanism (400) further includes an adjusting screw (450), the first guide shell (410) is provided with a receiving cavity (411), the first elastic reset member (440) is located in the receiving cavity (411), the adjusting screw (450) is threadedly connected to the first guide shell (410), the adjusting screw (450) is slidably connected to the receiving cavity (411), and the two ends of the first elastic reset member (440) abut against the first sliding assembly (420) and the adjusting screw (450) respectively.

5. The gear flow meter according to any one of claims 2 to 4, characterized in that, The partition (160) includes a fixed partition (161), a first movable partition (162), a second movable partition (163), and a third movable partition (164). The fixed partition (161) is disposed inside the flowmeter housing (100). The first movable partition (162), the second movable partition (163), and the third movable partition (164) are all slidably connected to the fixed partition (161). The first gear (200) is rotatably connected to the first movable partition (162), and the second... The gear (300) is rotatably connected to the second movable partition (163) in a sealed manner. The third movable partition (164) is located between the first movable partition (162) and the second movable partition (163). The total outer diameter of the first movable partition (162) and the third movable partition (164) is not less than the outer diameter of the first gear (200), and the total outer diameter of the second movable partition (163) and the third movable partition (164) is not less than the outer diameter of the second gear (300). It also includes a limiting assembly (60). 0), the limiting component (600) and the telescopic mechanism (500) are each provided in two sets, the output ends of the two sets of telescopic mechanisms (500) are respectively connected to the first movable partition (162) and the second movable partition (163), one set of the limiting component (600) is located between the first gear (200) and the first movable partition (162), and the other set of the limiting component (600) is located between the second gear (300) and the second movable partition (163), and also includes a controller (700). The controller (700) is electrically connected to the limiting component (600); it also includes a telescopic support component (800), the two ends of which are respectively connected to the flow meter housing (100) and the third movable partition (164); when the telescopic mechanism (500) drives the first movable partition (162) or the second movable partition (163) to move, the first movable partition (162) or the second movable partition (163) drives the third movable partition (164) to move.

6. The gear flow meter according to claim 5, characterized in that, The first gear (200) and the second gear (300) are both connected to a rotating rod (210). The first gear (200) and the second gear (300) are rotatably connected to the two movable partitions (162) respectively through the rotating rod (210). The limiting component (600) includes a miniature telescopic component (610) and a friction plate (620). The miniature telescopic component (610) is respectively disposed in the movable partition (162). The friction plate (620) is connected to the output end of the miniature telescopic component (610). The friction plate (620) is located between the rotating rod (210) and the movable partition (162). The controller (700) is electrically connected to the miniature telescopic component (610).

7. The gear flow meter according to claim 5, characterized in that, The telescopic mechanism (500) includes a second guide shell (510), a second sliding assembly (520), and a telescopic drive (530). The second guide shell (510) is disposed on the flow meter housing (100). One end of the second sliding assembly (520) is slidably connected to the second guide shell (510), and the other end of the second sliding assembly (520) is connected to the movable partition (162). The second sliding assembly (520) is at least partially located within the auxiliary flow section (140). The telescopic drive (530) is connected to the second guide shell (510), and the output end of the telescopic drive (530) is connected to the second sliding assembly (520).

8. The gear flow meter according to claim 7, characterized in that, The telescopic drive component (530) is an electric telescopic rod, which is mounted on the second guide shell (510). The output end of the electric telescopic rod is connected to the second sliding assembly (520), and the electric telescopic rod is electrically connected to the controller (700).

9. The gear flow meter according to claim 7, characterized in that, The telescopic drive component (530) is configured as a turbine blade, which is rotatably connected to the second guide shell (510). The turbine blade is located in the auxiliary flow section (140), and the turbine blade is threadedly connected to the second sliding assembly (520). It also includes a second elastic reset component, the two ends of which are respectively connected to the turbine blade and the second sliding assembly (520).

10. The gear flow meter according to claim 5, characterized in that, The third movable partition (164) has a first groove and a second groove on the side near the metering space. The first movable partition (162) has a first protrusion located in the first groove. The second movable partition (163) has a second protrusion located in the second groove. The telescopic support assembly (800) includes a third guide shell (810), a third sliding assembly (820), and a second elastic reset member (830). The third guide shell (810) is disposed on the flow meter housing (100). One end of the third sliding assembly (820) is connected to the third movable partition (164), and the other end of the third sliding assembly (820) is slidably connected to the third guide shell (810). The second elastic reset member (830) is located inside the third guide shell (810), and both ends of the second elastic reset member (830) are connected to the third sliding assembly (820) and the third guide shell (810), respectively.

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