A remote transmission type rotameter

Abstract

The present invention relates to the technical field of fluid flow measurement, and specifically relates to a remote transmission type rotor flowmeter, which includes: a flowmeter housing, a guide post is provided inside the flowmeter housing, and a fixed post is provided at the top of the guide post; and a float located inside the flowmeter housing and capable of sliding vertically along the guide post, the float includes a floating body and a turntable that are rotatably connected to each other, a liquid discharge hole is provided on the floating body, and a liquid discharge groove is provided on the turntable, so as to automatically adjust the fluid flow resistance of the float by the dislocation and coincidence of the liquid discharge groove and the liquid discharge hole. The present invention adjusts the relative position of the turntable and the floating body to adjust the number of opened liquid discharge holes on the floating body, realizes the adjustment of the fluid resistance of the floating body, and further adjusts and increases the range of the flowmeter without changing the weight of the float and the shape of the flowmeter housing, so as to adapt to different use environments. The flowmeter housing and the float can be produced as standard parts, reducing the difficulty of its production and processing.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid flow measurement, and particularly relates to a remote transmission type rotameter. Background Art

[0002] A rotameter, as a flow measurement instrument based on the throttling principle, is widely used in the flow measurement of fluid media such as liquids and gases in multiple fields such as industry, chemical industry, and environmental protection. It has a simple structure, is intuitive, and is convenient to maintain. It is suitable for medium and small flow measurements, and has obvious advantages especially in scenarios where on-site display or low-cost solutions are required.

[0003] The core components of a rotameter include a conical tube and a rotor (float) placed in the tube and capable of freely moving along the center line. When the fluid passes through the rotameter, when the dynamic pressure of the fluid on the rotor, the buoyancy of the rotor in the fluid, and the gravity of the rotor itself reach equilibrium, the rotor will stably suspend at a certain position in the conical tube. By observing the position of the rotor, the flow rate of the fluid can be known.

[0004] Traditional rotameters usually adopt a fixed range design. Once the flow rate of the fluid exceeds its preset range, at this time, the flow rate is too large, and the float will be affected by too large a fluid dynamic force, resulting in it continuously pressing against the inner wall of the rotameter or a certain position of the conical tube. In this case, the float can no longer move freely with the change of the flow rate, so it cannot accurately reflect the actual flow rate of the fluid. This out-of-range state will not only cause a significant decrease in measurement accuracy, making the obtained flow rate data unreliable, but may also damage the rotameter itself, affecting its long-term use performance and lifespan. Summary of the Invention

[0005] Aiming at the above-mentioned disadvantages of the prior art, the present invention provides a remote transmission type rotameter, which can effectively solve the problems in the prior art that the flow measurement range cannot be adjusted, easily leads to a decrease in measurement accuracy, and affects the continuous and stable use of the equipment.

[0006] To achieve the above object, the present invention is realized through the following technical solutions:

[0007] The present invention provides a remote transmission type rotameter, including:

[0008] A flowmeter housing, wherein a guide post is provided inside the flowmeter housing, and a fixed post is provided at the top of the guide post;

[0009] And a float located inside the flowmeter housing and capable of sliding vertically along the guide post. The float includes a floating body and a turntable that are rotatably connected to each other. A liquid discharge hole is provided on the floating body, and a liquid discharge groove is provided on the turntable to automatically adjust the flow resistance of the float to the fluid by the dislocation and coincidence of the liquid discharge groove and the liquid discharge hole.

[0010] According to some embodiments of the present invention, the number of the liquid discharge grooves is set to N groups, and each group is provided with M liquid discharge grooves. The N groups of liquid discharge grooves are sequentially arranged along the radial direction of the turntable from the axis to the edge, and the M liquid discharge grooves are annularly and arrayedly distributed on the turntable.

[0011] According to some embodiments of the present invention, the liquid discharge grooves of adjacent groups are staggeredly distributed. The number of the liquid discharge holes is the same as that of the liquid discharge grooves, and the arrangement manner of the liquid discharge holes on the floating body is the same as that of the liquid discharge grooves on the turntable.

[0012] According to some embodiments of the present invention, the size of the liquid discharge groove is larger than that of the liquid discharge hole, and the liquid discharge groove and the liquid discharge hole are staggered in the initial state.

[0013] According to some embodiments of the present invention, a fixing platform extending into the floating body is provided on the turntable, and a guiding member for guiding the rotation of the turntable when abutting against the fixing column is provided on the top of the fixing platform, so as to adjust the overlapping number of the liquid discharge grooves and the liquid discharge holes.

[0014] According to some embodiments of the present invention, a clockwork spring for resetting is provided between the fixing platform and the floating body. A ratchet wheel is provided at the bottom of the fixing platform, and a triggering member for restricting the reverse rotation of the ratchet wheel is provided on the floating body.

[0015] According to some embodiments of the present invention, the triggering member includes a pawl rotatably arranged on the floating body and a movable sleeve slidably arranged on the floating body. A spring-shaped guide groove is arranged in the movable sleeve, and a guiding rotating shaft matched with the spring-shaped guide groove is arranged on the rotating shaft of the pawl. When the movable sleeve descends, the guiding rotating shaft is driven to drive the pawl to abut against the ratchet wheel.

[0016] According to some embodiments of the present invention, a reset spring is provided between the movable sleeve and the pawl. The reset spring is used for always pushing the movable sleeve to the side away from the pawl, so as to better abut the pawl against the ratchet wheel.

[0017] According to some embodiments of the present invention, a prism is provided at the bottom of the movable sleeve, and the prism is slidably connected with the floating body.

[0018] Beneficial effects

[0019] The technical solution provided by the present invention has the following beneficial effects compared with the known prior art:

[0020] First, by adjusting the relative positions of the turntable and the floating body, the number of opened liquid discharge holes on the floating body is adjusted, so as to adjust the fluid resistance of the floating body. Furthermore, without changing the weight of the float and the shape of the flowmeter housing, the range of the flowmeter is adjusted and increased to adapt to different use environments. The flowmeter housing and the float can be produced as standard parts, reducing the production and processing difficulty thereof;

[0021] Second, by providing a guiding member with a special shape on the turntable, when the fluid flow rate in the flowmeter housing is too large and the float is pushed to the top of the flowmeter housing, after the guiding member contacts the fixed column, it guides the turntable to rotate and then opens the liquid discharge hole on the floating body, so as to reduce the obstruction of the float to the fluid, and then automatically adjust the measuring range of the flowmeter;

[0022] Third, by providing a triggering member, when the fluid flow rate in the flowmeter housing decreases, the fluid resistance received by the float decreases, and when the float drops to the bottom of the flowmeter housing, the movable sleeve is pressed and extends into the float body. At this time, in cooperation with the spring-shaped guide groove and the guiding rotating shaft, the ratchet pawl is driven to rotate in the reverse direction, canceling the restriction on the ratchet wheel. Under the action of the clockwork spring, the turntable resets and blocks the liquid discharge hole again, increasing the obstruction of the float to the fluid and reducing the measuring range of the flowmeter again, realizing a closed-loop full-automatic adjustment. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is an exploded bottom view of the structure of the float of the present invention;

[0026] Figure 3 It is an exploded top view of the structure of the float of the present invention;

[0027] Figure 4 It is a partial cross-sectional view of the float of the present invention;

[0028] Figure 5 For the present invention Figure 4 An enlarged view of part A;

[0029] Figure 6 It is a schematic connection diagram of the ratchet wheel and the ratchet pawl of the present invention;

[0030] Figure 7 It is a cross-sectional view of the flowmeter housing of the present invention;

[0031] Figure 8 It is a state change diagram of the turntable and the float when the turntable rotates in the present invention.

[0032] Reference numerals: 1, flowmeter housing; 11, guide post; 111, fixed post; 2, float; 21, floating body; 2101, liquid discharge hole; 22, turntable; 2201, liquid discharge groove; 221, fixed table; 222, guide member; 223, ratchet; 224, clockwork spring; 23, trigger member; 231, ratchet pawl; 232, guide rotating shaft; 233, movable sleeve; 2331, spring-shaped guide groove; 234, return spring. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0034] The present invention will be further described below with reference to the embodiments.

[0035] Referring to the attached Figure 1-8 , a remote transmission type rotor flowmeter, comprising:

[0036] A flowmeter housing 1 is provided with a guide post 11 inside, and a fixed post 111 is provided at the top of the guide post 11. The guide post 11 is used to guide the subsequent lifting of the float 2. A limiting strip-shaped groove is provided on the guide post 11, and a slider extending into the strip-shaped groove is provided on the float 2, which is used to guide the float 2 to slide on the flowmeter housing 1. At the same time, by setting a sensing element to communicate with a display outside the flowmeter housing 1, this technology is a relatively conventional existing technology and will not be elaborated here too much;

[0037] And a float 2 located inside the flowmeter housing 1 and capable of sliding vertically along the guide post 11. The float 2 includes a float body 21 and a turntable 22 that are rotatably connected to each other. There are ball bearings between the float body 21 and the turntable 22, and the ball bearings are used to reduce the rotational friction between the float body 21 and the turntable 22. The float body 21 is provided with a liquid discharge hole 2101, and the turntable 22 is provided with a liquid discharge groove 2201. By the dislocation and coincidence of the liquid discharge groove 2201 and the liquid discharge hole 2101, the automatic adjustment of the fluid flow resistance of the float 2 is realized. By adjusting the relative rotation between the turntable 22 and the float body 21 and fixing them, the blocking or opening of the liquid discharge hole 2101 on the float body 21 by the turntable 22 is realized. In the initial state, the turntable 22 blocks the liquid discharge hole 2101, increasing the flow resistance of the fluid to the float body 21. Thus, when the fluid of the same flow rate passes through, the overall position movement change of the float 2 is relatively large. For example, when the flow rate changes from 1 L / min to 2 L / min, the float 2 rises from the bottom of the flowmeter housing 1 to the top of the flowmeter housing 1. When the flow velocity inside the flowmeter is greater than 2 L / min, the float 2 still abuts against the top of the flowmeter housing 1, and the measuring range of the flowmeter is less than or equal to 2 L. And after rotating the turntable 22 to expose some of the liquid discharge holes 2101 on the float body 21, the flow resistance of the fluid to the float body 21 is reduced. Thus, when the fluid of the same flow rate passes through, the overall position movement change of the float 2 is relatively small. For example, when the flow rate changes from 1 L / min to 2 L / min, the float 2 only rises from the bottom of the flowmeter housing 1 to the middle of the flowmeter housing 1. When the flow velocity inside the flowmeter is greater than 2 L / min, the float 2 can continue to move upward. At this time, the measuring range of the flowmeter is greater than 2 L. By setting multiple groups of scales for visual reference in different periods, the setting of the scales can be obtained through reverse experiments. For example, a certain amount of fluid is introduced into the flowmeter housing 1 and kept, the position of the float 2 is observed and recorded, and then the amount of fluid is continuously increased to observe and record the position of the float 2, and then the scale numerical marks are gradually made.

[0038] In the above technical solution, by adjusting the relative position between the turntable 22 and the float body 21, the number of opened liquid discharge holes 2101 on the float body 21 is adjusted to realize the adjustment of the fluid resistance of the float body 21. Thus, without changing the weight of the float 2 and the shape of the flowmeter housing 1, the measuring range of the flowmeter is adjusted to adapt to different use environments. The flowmeter housing 1 and the float 2 can be produced as standard parts, reducing the difficulty of their production and processing.

[0039] According to some embodiments of the present invention, such as Figure 2-3 And Figure 8As shown, the number of drain troughs 2201 is set to N groups. Only two groups are drawn in the attached drawings for the convenience of showing their structure for easy understanding, not just two groups are provided. And each group has M pieces. Only four pieces are drawn for each group in the attached drawings, which is also only for the convenience of understanding, not just four pieces are set. The N groups of drain troughs 2201 are sequentially arranged along the radial direction of the turntable 22 from the axis to the edge. The M drain troughs 2201 are annularly arrayed on the turntable 22. By providing multiple groups of drain holes 2101 on the floating body 21 to cooperate with the drain troughs 2201 on the turntable 22, the multiple groups of drain holes 2101 are simultaneously closed to increase or simultaneously opened to reduce the fluid resistance of the float 2.

[0040] Further, the drain troughs 2201 of adjacent groups are staggeredly distributed. The number of drain holes 2101 is the same as that of the drain troughs 2201, and the arrangement mode of the drain holes 2101 on the floating body 21 is the same as the arrangement mode of the drain troughs 2201 on the turntable 22. Through the multiple groups of staggeredly arranged drain troughs 2201 and drain holes 2101, the drain holes 2101 can be sequentially opened. When the turntable 22 rotates and opens the drain holes 2101, if the whole float 2 is still at the top of the flowmeter housing 1 and the fluid flow rate cannot be observed, the turntable 22 can continue to rotate to open more drain holes 2101. At this time, without changing the overall weight of the float 2, the obstruction of the floating body 21 to the fluid is further reduced, realizing multi-stage adjustment.

[0041] Still further, the size of the drain troughs 2201 is larger than that of the drain holes 2101, and in the initial state, the drain troughs 2201 and the drain holes 2101 are staggered. By setting the size of the drain troughs 2201 larger than that of the drain holes 2101, after the turntable 22 rotates to open some of the drain holes 2101, as the turntable 22 continues to rotate, more drain holes 2101 can be opened and the previously opened drain holes 2101 will not be blocked.

[0042] Among them, a fixed platform 221 extending into the floating body 21 is provided on the turntable 22, and a guiding member 222 for guiding the rotation of the turntable 22 when contacting the fixed column 111 is provided on the top of the fixed platform 221 to adjust the overlapping number of the drain troughs 2201 and the drain holes 2101. By providing the guiding member 222 on the turntable 22, where the starting end to the ending end of the guiding member 222 gradually rises, and the guiding member 222 is arc-shaped and provided on the top of the fixed platform 221, when the whole float 2 rises to the highest point, it will contact the fixed column 111. With the continuous rise of the float 2 and the special structure of the guiding member 222, the rotation of the turntable 22 is continuously guided, realizing the automatic adjustment of the turntable 22 without electronic components such as sensors, improving the stability of the equipment and reducing the production and processing costs.

[0043] In addition, a clockwork spring 224 for resetting is provided between the fixed platform 221 and the floating body 21. A ratchet wheel 223 is provided at the bottom of the fixed platform 221, and a trigger member 23 for restricting the rotation of the ratchet wheel 223 is provided on the floating body 21. By providing the clockwork spring 224 and the ratchet wheel 223, it is possible to prevent the reset after the guide member 222 and the fixed column 111 are disengaged.

[0044] In the above technical solution, by providing a guide member 222 with a special shape on the turntable 22, when the fluid flow rate in the flowmeter housing 1 is too large and the float 2 is pushed to the top of the flowmeter housing 1, after the guide member 222 contacts the fixed column 111, it guides the turntable 22 to rotate and then opens the liquid discharge hole 2101 on the floating body 21, so as to reduce the resistance of the float 2 to the fluid, increase the measuring range of the flowmeter, and thus automatically adjust the measuring range of the flowmeter.

[0045] In addition, referring to the attached Figure 3-6 , the trigger member 23 includes a pawl 231 rotatably provided on the floating body 21 and a movable sleeve 233 slidably provided on the floating body 21. The pawl 231 is used to restrict the rotation of the ratchet wheel 223. A spring-shaped guide groove 2331 is provided in the movable sleeve 233, and a guide rotating shaft 232 cooperating with the spring-shaped guide groove 2331 is provided on the rotating shaft of the pawl 231. When the movable sleeve 233 descends, it drives the guide rotating shaft 232 to drive the pawl 231 to abut against the ratchet wheel 223. Under the action of the gravity of the movable sleeve 233, the movable sleeve 233 will be pulled away from the guide rotating shaft 232, and in cooperation with the spring-shaped guide groove 2331, the pawl 231 will always abut against the ratchet wheel 223 to restrict the rotation of the ratchet wheel 223.

[0046] It should be noted that a reset spring 234 is provided between the movable sleeve 233 and the pawl 231. The reset spring 234 is used to always push the movable sleeve 233 to the side away from the pawl 231. In order to prevent the influence of the fluid on the movable sleeve 233 and prevent the movable sleeve 233 from not moving downward well, the movable sleeve 233 is further abutted by the reset spring 234 to better abut the pawl 231 against the ratchet wheel 223. In addition, a prism is provided at the bottom of the movable sleeve 233, and the prism is slidably connected to the floating body 21 to prevent relative rotation of the movable sleeve 233 when moving in the floating body 21.

[0047] In the above technical solution, when the turntable 22 rotates relative to the floating body 21 to open the liquid discharge hole 2101 and the fluid flow rate in the flowmeter housing 1 decreases, the fluid resistance received by the float 2 decreases. When the resistance cannot fully support the float 2, the float 2 will drop to the bottom of the flowmeter housing 1. At this time, the movable sleeve 233 is pressed and extends into the floating body 21. At this time, the spring-shaped guide groove 2331 and the guide rotating shaft 232 are used to drive the pawl 231 to rotate reversely, canceling the restriction on the ratchet wheel 223. At this time, under the action of the clockwork spring 224, the turntable 22 resets and re-blocks the liquid discharge hole 2101, increasing the obstruction of the float 2 to the fluid, raising the float 2 again, and realizing a closed-loop full-automatic adjustment.

[0048] Working principle: When the fluid flow rate in the flowmeter housing 1 changes and the float 2 is pushed to the top of the flowmeter housing 1, through the special-shaped guide member 222 provided on the turntable 22, after the guide member 222 contacts the fixed column 111, the turntable 22 is guided to rotate to open the liquid discharge hole 2101 on the floating body 21, reducing the obstruction of the float 2 to the fluid. Thus, without changing the weight of the float 2 and the shape of the flowmeter housing 1, the range of the flowmeter is adjusted and increased to adapt to different usage environments. When the turntable 22 rotates relative to the floating body 21 to open the liquid discharge hole 2101 and the fluid flow rate in the flowmeter housing 1 decreases, the fluid resistance received by the float 2 decreases. When the resistance cannot fully support the float 2, the float 2 will drop to the bottom of the flowmeter housing 1. At this time, the movable sleeve 233 is pressed and extends into the floating body 21. At this time, the spring-shaped guide groove 2331 and the guide rotating shaft 232 are used to drive the pawl 231 to rotate reversely, canceling the restriction on the ratchet wheel 223. At this time, under the action of the clockwork spring 224, the turntable 22 resets and re-blocks the liquid discharge hole 2101, increasing the obstruction of the float 2 to the fluid and reducing the range of the flowmeter. At this time, the float 2 is pushed up by the fluid again, realizing the full-automatic adjustment of increasing or decreasing the flowmeter range.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A remote transmission type rotameter, characterized in that, Comprising: A flowmeter housing (1), within which a guide post (11) is provided, and a fixed post (111) is provided at the top of the guide post (11); And a float (2) located within the flowmeter housing (1) and capable of sliding vertically along the guide post (11). The float (2) includes a float body (21) and a turntable (22) that are rotatably connected to each other. A liquid discharge hole (2101) is provided on the float body (21), and a liquid discharge groove (2201) is provided on the turntable (22). To achieve automatic adjustment of the fluid flow resistance of the float (2) by the dislocation and coincidence of the liquid discharge groove (2201) and the liquid discharge hole (2101). A fixed platform (221) extending into the float body (21) is provided on the turntable (22), and a guiding member (222) for guiding the rotation of the turntable (22) when it abuts against the fixed post (111) is provided at the top of the fixed platform (221), so as to adjust the number of coincidences between the liquid discharge groove (2201) and the liquid discharge hole (2101). A clockwork spring (224) for resetting is provided between the fixed platform (221) and the float body (21). A ratchet wheel (223) is provided at the bottom of the fixed platform (221), and a triggering member (23) for restricting the rotation of the ratchet wheel (223) is provided on the float body (21). The triggering member (23) includes a pawl (231) rotatably provided on the float body (21) and a movable sleeve (233) slidably provided on the float body (21). A spring-shaped guide groove (2331) is provided within the movable sleeve (233), and a guiding rotating shaft (232) cooperating with the spring-shaped guide groove (2331) is provided on the rotating shaft of the pawl (231). When the movable sleeve (233) descends, it drives the guiding rotating shaft (232) to drive the pawl (231) to abut against the ratchet wheel (223).

2. The remote transmission type rotameter according to claim 1, wherein The number of the liquid discharge grooves (2201) is set to N groups, and each group has M. The N groups of liquid discharge grooves (2201) are sequentially arranged along the radial direction of the turntable (22) from the axis to the edge direction, and the M liquid discharge grooves (2201) are annularly and arrayedly distributed on the turntable (22).

3. A remote transmission type rotameter according to claim 1, characterized in that, The adjacent groups of liquid discharge grooves (2201) are staggeredly distributed. The number of the liquid discharge holes (2101) is the same as that of the liquid discharge grooves (2201), and the arrangement manner of the liquid discharge holes (2101) on the float body (21) is the same as the arrangement manner of the liquid discharge grooves (2201) on the turntable (22).

4. The remote transmission type rotameter according to claim 3, characterized in that, The size of the liquid discharge groove (2201) is larger than that of the liquid discharge hole (2101), and in the initial state, the liquid discharge groove (2201) and the liquid discharge hole (2101) are dislocated.

5. A remote transmission type rotameter according to claim 1, characterized in that, A reset spring (234) is provided between the movable sleeve (233) and the pawl (231). The reset spring (234) is used to always push the movable sleeve (233) towards the side away from the pawl (231) to better abut the pawl (231) against the ratchet wheel (223).

6. The remote transmission type rotameter according to claim 1, wherein A prism is provided at the bottom of the movable sleeve (233), and the prism is slidably connected to the float body (21).

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