A metal tube float flowmeter

Abstract

The present invention relates to the technical field of liquid flow metering, and proposes a metal tube float flowmeter, including a main body, the main body having a stroke channel, the stroke channel having an inlet and an outlet; a float slides in the stroke channel; a first elastic member is arranged on the inner wall of the stroke channel at one end, and the other end is arranged on the float, providing a force for the float to approach the inlet; both ends of the stroke channel have limit parts, the two limit parts are symmetrically arranged, and the ends of the two limit parts close to each other both have a stopper, one end of the first elastic member is arranged on the stopper close to the outlet side, and the float slides close to or away from the stopper close to the inlet side. Through the above technical scheme, the problem of increased difficulty in installation and use caused by the traditional float flowmeter in the prior art that can only measure the fluid entering from the bottom of the flowmeter and flowing out from the top in a vertical manner is solved.

Description

Technical Field

[0001] The invention relates to the technical field of liquid flow metering, and in particular to a metal tube float flowmeter. Background Art

[0002] A float flowmeter is an instrument specifically used to measure the flow of liquid or gas in a pipeline. Its working principle is based on the variable area principle. In the vertical tapered tube of the flowmeter, there is a float that can move up and down. When the fluid flows through the tapered tube, the float will rise due to the combined force of its own gravity and the force of the fluid. The greater the flow rate of the fluid, the higher the float rises. By reading the scale position of the float, the flow rate can be determined. However, in view of the structural principle constraints of the prior art, the traditional float flowmeter can only measure the fluid entering from the bottom of the flowmeter and flowing out from the top in a vertical manner. This bottom-in and top-out measurement method has certain limitations. For example, in some complex pipeline layouts, if the pipeline direction is not vertical, but horizontal or inclined, the traditional float flowmeter is difficult to adapt and cannot accurately measure the flow. Moreover, in an environment with limited space, the requirement for vertical installation may increase the difficulty of installation or even make it impossible to install. In addition, the bottom-in and top-out method is not flexible enough in some scenarios that require multi-directional measurement or rapid change of measurement direction, and cannot meet actual needs, which may affect the flow monitoring and control effect in the production process. Summary of the invention

[0003] The present invention provides a metal tube float flowmeter, which solves the problem that the traditional float flowmeter in the related art can only measure the fluid entering from the bottom of the flowmeter and flowing out from the top in a vertical manner, which increases the difficulty of installation and use.

[0004] The technical solution of the present invention is as follows:

[0005] A metal tube float flowmeter, comprising:

[0006] A main body, the main body having a travel channel, the travel channel having an inlet and an outlet;

[0007] a float, the float sliding in the travel channel;

[0008] a first elastic member, one end of which is arranged on the inner wall of the travel channel, and the other end of which is arranged on the float, to provide a force for the float to approach the inlet;

[0009] The two ends of the stroke channel have limiting parts, the two limiting parts are symmetrically arranged, and the ends of the two limiting parts close to each other have a blocking part. One end of the first elastic member is arranged on the blocking part close to the outlet side, and the float slides close to or away from the blocking part close to the inlet side.

[0010] As a further technical solution, the limiting portion and the main body are an integral structure or a separate structure.

[0011] As a further technical solution, the travel channel has a first conical section and a cylindrical section, the outlet is located at one end of the cylindrical section, the first conical section and the cylindrical section are transitionally connected, and the float slides in the first conical section and the cylindrical section.

[0012] As a further technical solution, a liquid flow channel is formed between the float and the inner wall of the stroke channel, and the liquid flow channel is configured so that after the float slides from one end of the first conical section away from the cylindrical section to one end close to the cylindrical section, the cross-sectional area of ​​the liquid flow channel increases.

[0013] As a further technical solution, the travel channel also has a second conical section and a necking section, the first conical section and the second conical section are transitionally connected to the two ends of the necking section respectively, and the second conical section, the necking section, the first conical section and the cylindrical section are arranged in sequence from the inlet to the outlet.

[0014] As a further technical solution, one end of the first conical section close to the necking section has an inner concave arc surface section, and one end of the float close to the necking section has an outer convex arc surface.

[0015] As a further technical solution, it also includes:

[0016] A limit block, wherein the limit block is arranged on the stop portion close to the inlet side, and after the float slides toward or away from the stop portion close to or away from the inlet side, the float abuts against or cancels the abutment with the limit block, and after the abutment, the float is located in the concave arc surface segment;

[0017] An indicator is arranged on the main body, the indicator is magnetically coupled with the float, and both ends of the main body have mounting parts.

[0018] As a further technical solution, it also includes:

[0019] A sliding block is slidably arranged in the cylindrical section, the sliding block divides the cylindrical section into an upper cylindrical cavity and a lower cylindrical cavity, the upper cylindrical cavity is located on the side of the lower cylindrical cavity close to the inlet, the sliding block has a side connecting port and a central connecting port, the side connecting port and the central connecting port both connect the upper cylindrical cavity and the lower cylindrical cavity, and the float abuts against or cancels the abutment with the sliding block after sliding, and blocks or cancels blocking the central connecting port.

[0020] As a further technical solution, it also includes:

[0021] An outflow shell is arranged on the outer wall of the main body and is located around the cylindrical section. The outflow shell has an auxiliary flow channel. The auxiliary flow channel has an auxiliary liquid inlet and an auxiliary liquid outlet. The auxiliary liquid inlet is connected to the upper cylindrical cavity, and the auxiliary liquid outlet is connected to the lower cylindrical cavity.

[0022] As a further technical solution, the outer flow shell is an annular shell, the inner wall of the auxiliary flow channel has an inner conical surface, and further includes:

[0023] A blocking block, wherein the blocking block is arranged around the sliding block, and the blocking block is a frustum-shaped block, the blocking block has an outer conical surface, the auxiliary flow channel is surrounded by the inner wall of the outer flow shell and the outer conical surface, the auxiliary flow channel has a variable diameter flow channel section, and the variable diameter flow channel section is surrounded by the inner conical surface and the outer conical surface, and the auxiliary liquid inlet, the auxiliary liquid outlet and the variable diameter flow channel section are configured such that after the sliding block drives the blocking block to slide, the auxiliary liquid outlet is enlarged to increase the variable diameter flow channel section, or the auxiliary liquid inlet is reduced to reduce the variable diameter flow channel section;

[0024] A second elastic member, one end of which is arranged on the sliding block, and the other end of which is arranged on the main body, provides a force for the sliding block to slide toward the inlet.

[0025] The working principle and beneficial effects of the present invention are:

[0026] In the present invention, when the fluid enters the stroke channel from the inlet, the fluid generates thrust on the float, overcomes the elastic force of the first elastic member, and pushes the float to move toward the outlet. As the flow rate changes, the position of the float in the stroke channel also changes accordingly. Due to the setting of the first elastic member, the float can stably move in the stroke channel under different flow rates and is not restricted by the installation direction. Whether it is installed horizontally, vertically or tilted, it can accurately reflect the change of flow. This greatly improves the installation flexibility and application scope of the float flowmeter, and can meet the needs of various complex installation environments. At the same time, the stable float movement and accurate flow reflection improve the measurement accuracy and reliability, and provide more effective data support for industrial production and flow monitoring. The setting of the limiter and the stopper limits the floating space of the float, so that the float always slides in the space channel that can accurately measure the flow rate. When the fluid enters the stroke channel from the inlet, the float overcomes the elastic force of the first elastic member and moves toward the outlet under the action of the fluid thrust. As the flow rate increases, the float gradually approaches the baffle on the outlet side; when the flow rate decreases, under the elastic force of the first elastic member, the float gradually moves away from the baffle on the outlet side and approaches the baffle on the inlet side. When the installation direction changes, for example, from vertical to horizontal or inclined, due to the symmetrical arrangement of the limiter and the baffle and the action of the first elastic member, the float can still move accurately in the stroke channel according to the flow rate. The symmetrically arranged limiter and baffle, in conjunction with the first elastic member, provide a stable and precise limit range for the movement of the float, ensuring that the movement of the float accurately reflects the flow rate changes regardless of how the installation direction changes. This significantly enhances the versatility and adaptability of the float flowmeter, enabling it to work normally in various complex and changeable installation environments, ensuring the accuracy and reliability of the measurement. At the same time, this structural design also reduces the measurement error and equipment damage risk caused by installation direction problems, and extends the service life of the float flowmeter. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0028] Figure 1 It is a schematic diagram of the structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0030] Figure 3 for Figure 2 A partial enlarged structural diagram of the middle part;

[0031] Figure 4 for Figure 2 A schematic diagram of the partially enlarged structure of the middle B part;

[0032] Figure 5 It is a schematic diagram of the sliding block structure in the present invention.

[0033] In the figure: main body-1, stroke channel-101, inlet-102, outlet-103, limiting part-104, blocking part-105, first conical section-106, cylindrical section-107, second conical section-108, necking section-109, inner concave arc surface section-110, mounting part-111, upper cylindrical cavity-112, lower cylindrical cavity-113, float-2, liquid flow channel-201, outer convex arc surface-202, first elastic member-3, limiting block-4, indicator-5, sliding block-6, side connecting port-601, center connecting port-602, outer flow shell-7, auxiliary flow channel-701, auxiliary liquid outlet-702, inner conical surface-703, variable diameter flow channel section-704, auxiliary liquid inlet-705, blocking block-8, outer conical surface-801, second elastic member-9. DETAILED DESCRIPTION

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0035] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0036] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0038] Reference Figure 1~Figure 5The embodiment of the present invention provides a metal tube float flowmeter, including a main body 1, the main body 1 has a stroke channel 101, the stroke channel 101 has an inlet 102 and an outlet 103; a float 2 slides in the stroke channel 101; one end of a first elastic member 3 is arranged on the inner wall of the stroke channel 101, and the other end is arranged on the float 2, providing a force for the float 2 to approach the inlet 102;

[0039] The two ends of the travel channel 101 have limit parts 104, and the two limit parts 104 are symmetrically arranged. The ends of the two limit parts 104 close to each other have a stop part 105. One end of the first elastic member 3 is arranged on the stop part 105 close to the outlet 103. After the float 2 slides, it approaches or moves away from the stop part 105 close to the inlet 102.

[0040] In this embodiment, when the fluid enters the stroke channel 101 from the inlet 102, the fluid generates a thrust on the float 2, overcomes the elastic force of the first elastic member 3, and pushes the float 2 to move toward the outlet 103. As the flow rate changes, the position of the float 2 in the stroke channel 101 also changes accordingly. Due to the setting of the first elastic member 3, the float 2 can stably move in the stroke channel 101 at different flow rates and is not restricted by the installation direction. Whether it is installed horizontally, vertically or tilted, it can accurately reflect changes in flow. This greatly improves the installation flexibility and scope of application of the float flowmeter, and can meet the needs of various complex installation environments. At the same time, the stable movement of the float 2 and the accurate flow reflection improve the measurement accuracy and reliability, and provide more effective data support for industrial production and flow monitoring.

[0041] The setting of the limit part 104 and the stop part 105 limits the moving space of the float 2, so that the float 2 always slides in the space channel that can accurately measure the flow rate. When the fluid enters the stroke channel 101 from the inlet 102, the float 2 overcomes the elastic force of the first elastic member 3 and moves toward the outlet 103 under the action of the fluid thrust. As the flow rate increases, the float 2 gradually approaches the stop part 105 on the side of the outlet 103; when the flow rate decreases, under the action of the elastic force of the first elastic member 3, the float 2 gradually moves away from the stop part 105 on the side of the outlet 103 and approaches the stop part 105 on the side of the inlet 102. When the installation direction changes, for example, from vertical to horizontal or inclined, due to the symmetrical setting of the limit part 104 and the stop part 105 and the action of the first elastic member 3, the float 2 can still move accurately in the stroke channel 101 according to the flow rate. The symmetrically arranged limiter 104 and stopper 105, in conjunction with the first elastic member 3, provide a stable and precise limit range for the movement of the float 2, ensuring that the movement of the float 2 accurately reflects the flow change regardless of how the installation direction changes. This significantly enhances the versatility and adaptability of the float flowmeter, enabling it to work normally in a variety of complex and changeable installation environments, ensuring the accuracy and reliability of the measurement. At the same time, this structural design also reduces the measurement error and equipment damage risk caused by installation direction problems, and extends the service life of the float flowmeter.

[0042] Furthermore, the limiting portion 104 and the main body 1 are an integral structure or a separate structure.

[0043] In this embodiment, there are two situations for the limiting part 104 and the main body 1. One is a split structure, that is, the limiting part 104 and the main body 1 are manufactured separately; the other is to connect the separated limiting part 104 and the main body 1 into an integrated structure through subsequent processing, such as welding. In the case of a split structure, the main body 1 and the limiting part 104 are produced separately. When the fluid passes through the stroke channel 101, the separated limiting part 104 can play a role in limiting the movement range of the float 2. After being connected into an integrated structure by welding or other means, the integrated setting will be more stable when the fluid flows through the stroke channel 101, but both can effectively limit the movement of the float 2. The setting of the split structure provides more flexibility for manufacturing. The main body 1 and the limiting part 104 can be manufactured separately according to different material properties and process requirements, thereby improving production efficiency and reducing costs. Connecting into an integrated structure by welding or other means enhances the overall stability and reliability, reduces the looseness and errors that may occur between components, and thus ensures the accuracy of measurement. This diversity of processes enables the selection of a more appropriate manufacturing method based on actual needs and production conditions during the production process, thereby meeting the performance and cost requirements of different users for float flowmeters.

[0044] Furthermore, the travel channel 101 has a first conical section 106 and a cylindrical section 107 , the outlet 103 is located at one end of the cylindrical section 107 , the first conical section 106 and the cylindrical section 107 are transitionally connected, and the float 2 slides in the first conical section 106 and the cylindrical section 107 .

[0045] In this embodiment, the fluid enters the stroke channel 101 from the inlet 102. When the flow rate is small, the float 2 floats in the first conical section 106. As the flow rate gradually increases, the float 2 moves from the conical section to the cylindrical section 107. When the flow rate increases to a certain extent, the float 2 is always located in the cylindrical section 107. This structural design has significant advantages. When the flow rate is small, the position change of the float 2 in the conical section is more obvious, which can accurately reflect the subtle changes of the small flow rate and improve the accuracy of the small flow rate measurement. When the flow rate increases, the float 2 enters the cylindrical section 107 and is always located therein. At this time, the cylindrical section 107 can adapt to the situation of large flow. The setting of the cylindrical section 107 is to reflect a flow state, that is, when the liquid flow rate is too large and exceeds the range of the corresponding device, it is reflected as a state of excessive flow on the reading device of the peripheral device while ensuring normal liquid circulation. This setting ensures the stability and accuracy of the flowmeter when measuring large flow rates. At the same time, regardless of the installation direction, this structure can work reliably, providing accurate guarantee for flow measurement under various complex installation conditions and broadening the scope of application of the flow meter.

[0046] Furthermore, a liquid flow channel 201 is formed between the float 2 and the inner wall of the stroke channel 101 , and the liquid flow channel 201 is configured so that after the float 2 slides from the end of the first conical section 106 away from the cylindrical section 107 to the end close to the cylindrical section 107 , the cross-sectional area of ​​the liquid flow channel 201 increases.

[0047] In this embodiment, when the fluid enters the stroke channel 101 from the inlet 102 and the flow rate is small, the float 2 is located at the end of the first conical section 106 away from the cylindrical section 107. As the flow rate increases, the float 2 slides from the end of the first conical section 106 away from the cylindrical section 107 to the end close to the cylindrical section 107. In this process, due to the change in the position of the float 2, the cross-sectional area of ​​the liquid flow channel 201 gradually increases. Such a design can achieve more accurate measurement of the flow rate. At a small flow rate, the smaller cross-sectional area of ​​the liquid flow channel 201 enables the float 2 to respond more sensitively to flow changes and improve measurement accuracy. As the flow rate increases, the increase in the cross-sectional area of ​​the liquid flow channel 201 can adapt to a larger flow rate, ensuring the measurement accuracy and stability of the flowmeter within a larger flow range. At the same time, this structure is not limited by the installation direction, and can effectively function regardless of how the flowmeter is installed, providing a reliable solution for flow measurement under various working conditions.

[0048] Furthermore, the travel channel 101 also has a second conical section 108 and a necking section 109. The first conical section 106 and the second conical section 108 are transitionally connected to the two ends of the necking section 109 respectively. The second conical section 108, the necking section 109, the first conical section 106 and the cylindrical section 107 are arranged in sequence from the inlet 102 to the outlet 103.

[0049] In this embodiment, when the fluid enters the stroke channel 101 from the inlet 102, it first passes through the second tapered section 108. Due to the presence of the second tapered section 108, the fluid can change its flow direction more smoothly and achieve backflow. This gentle slope effectively reduces the pressure loss and ensures the stability of the fluid flow. The setting of the second tapered section 108 plays an important role. Compared with the right-angle structure, its gentle slope can significantly reduce the pressure loss. The reduction in pressure loss not only reduces energy consumption, but also helps to improve the efficiency of the system. At the same time, the gentle transition ensures that the flow state of the fluid is relatively stable, so that the shape of the fluid can be maintained, thereby improving the accuracy and reliability of the measurement. Regardless of the installation direction, the second tapered section 108 can play its role in reducing pressure loss and stabilizing the flow state, ensuring that the performance of the flow meter is not affected by the installation conditions, and further improving the versatility and practicality of the flow meter.

[0050] Furthermore, one end of the first conical section 106 close to the necking section 109 has an inner concave arc surface section 110 , and one end of the float 2 close to the necking section 109 has an outer convex arc surface 202 .

[0051] In this embodiment, when the fluid flows in the stroke channel 101, in the case where there is an elastic member as a source of resistance, the float 2 will move according to the flow rate. Due to the presence of the concave arc surface section 110 of the first conical section 106 and the convex arc surface 202 of the float 2, the shape of the liquid flow channel 201 will change. Through this change, the force of the liquid flow on the float 2 is adjusted, thereby achieving the adjustment of the uniform movement state of the float 2. The setting of the concave arc surface section 110 and the convex arc surface 202 enables the movement uniformity of the float 2 to be accurately controlled by adjusting the liquid flow channel 201 in complex situations where the elastic member generates resistance. This significantly improves the measurement accuracy and stability of the flowmeter, ensuring the accuracy and reliability of the measurement results. Moreover, no matter what installation direction the flowmeter is in, this adjustment mechanism can operate normally, is not affected by the installation angle and position, and fully guarantees the performance of the flowmeter under various working conditions.

[0052] Furthermore, it also includes a limit block 4 arranged on the stopper 105 on the side close to the inlet 102. After the float 2 slides toward the stopper 105 on the side close to or away from the inlet 102, the float 2 abuts against or cancels the abutment with the limit block 4, and after the abutment, the float 2 is located in the concave arc surface section 110; the indicator 5 is arranged on the main body 1, the indicator 5 is magnetically coupled with the float 2, and the two ends of the main body 1 have mounting parts 111.

[0053] In this embodiment, when the fluid flows through the stroke channel 101, the float 2 will slide toward or away from the stopper 105 on the side of the inlet 102 according to the change of flow rate. During the sliding process, the float 2 will abut against or cancel the abutment with the limit block 4. When the float 2 abuts against the limit block 4, its position is just in the concave arc section 110 at one end of the first conical section 106 close to the constriction section 109. Unlike the case where there is only the stopper 105, after the limit block 4 is added, the float 2 abuts against the limit block 4. The setting of the limit block 4 can provide a more stable abutment limit compared to the case where there is only the stopper 105. When there is only the stopper 105, the float 2 may shake when it is limited, and the limit block 4 can effectively avoid this situation. It allows the float 2 to remain stable when it is limited, preventing the flow instability caused by the shaking of the float 2, thereby significantly improving the accuracy and stability of the measurement. Regardless of the installation direction of the flow meter, the limit block 4 can function reliably to ensure that the limit state of the float 2 is stable and reliable, thus providing a strong guarantee for the accurate measurement of the flow meter.

[0054] When the fluid flows in the stroke channel 101 and causes the float 2 to move, due to the magnetic coupling between the float 2 and the indicator 5, the position change of the float 2 will be transmitted to the indicator 5 through the magnetic force. Through the magnetic coupling method, the indicator 5 can accurately reflect the position change of the float 2 without direct contact with the float 2, thereby indicating the flow rate. This non-contact coupling method reduces friction and wear between components, improves the service life of the equipment and the stability of measurement. At the same time, no matter how the flowmeter is installed, the effect of magnetic coupling can effectively transmit the movement information of the float 2, ensuring that the indicator 5 can accurately indicate the flow rate in various installation directions.

[0055] The mounting portion 111 specifically adopts a flange mounting portion 111, which has a firm and reliable connection and good sealing performance. It is relatively convenient during installation and disassembly, and is easy to maintain and replace. Moreover, the flange mounting method has strong versatility and can match pipes and equipment with various standard flange interfaces, greatly improving the application scope and installation flexibility of the flowmeter. Regardless of the installation direction and position of the flowmeter, the flange mounting portion 111 can ensure its stable and tight connection, providing a strong guarantee for accurate flow measurement.

[0056] Furthermore, it also includes a sliding block 6 that is slidably set in the cylindrical section 107, and the sliding block 6 divides the cylindrical section 107 into an upper cylindrical cavity 112 and a lower cylindrical cavity 113. The upper cylindrical cavity 112 is located on the side of the lower cylindrical cavity 113 close to the inlet 102. The sliding block 6 has a side connecting port 601 and a central connecting port 602. The side connecting port 601 and the central connecting port 602 both connect the upper cylindrical cavity 112 and the lower cylindrical cavity 113. After the float 2 slides, it abuts against or cancels the abutment with the sliding block 6, and blocks or cancels blocking the central connecting port 602.

[0057] In this embodiment, a sliding block 6 is also provided. The sliding block 6 can slide in the cylindrical section 107, thereby dividing the cylindrical section 107 into an upper cylindrical cavity 112 and a lower cylindrical cavity 113, and the upper cylindrical cavity 112 is located on the side of the lower cylindrical cavity 113 close to the inlet 102. The sliding block 6 has a side connecting port 601 and a central connecting port 602, and both of these connecting ports can connect the upper cylindrical cavity 112 and the lower cylindrical cavity 113. When the fluid flows through, the float 2 will slide according to the flow rate. During the sliding process, the float 2 will abut against or cancel the abutment with the sliding block 6. When the float 2 abuts against the sliding block 6, it will block or cancel the blocking of the central connecting port 602 of the sliding block 6. This design solves the problem of measurement difficulties caused by the large elastic force of the elastic member in the cylindrical section 107. Through the contact between the sliding block 6 and the float 2, although the detection accuracy of the flow in the cylindrical section 107 is not as good as that of the conical section, it can roughly reflect the flow of the super-large liquid flow, providing a valuable reference for subsequent adjustments. Even under the condition of super-large liquid flow, the user can have a preliminary understanding of the flow, and can judge that the entire liquid flow is in an over-range state according to the indication. At this time, non-metering tasks, such as cleaning, can be completed, and it is also convenient to perform efficient and accurate subsequent adjustment operations.

[0058] Furthermore, it also includes an outflow shell 7, which is arranged on the outer wall of the main body 1 and is located around the cylindrical section 107. The outflow shell 7 has an auxiliary flow channel 701, and the auxiliary flow channel 701 has an auxiliary liquid inlet 705 and an auxiliary liquid outlet 702. The auxiliary liquid inlet 705 is connected to the upper cylindrical cavity 112, and the auxiliary liquid outlet 702 is connected to the lower cylindrical cavity 113.

[0059] In this embodiment, in view of the fact that the float 2 and the sliding block 6 will form a whole body after abutting and slide in the direction close to the outlet 103, in order to ensure a good driving force for the whole body and a stable flow rate, an outflow shell 7 is specially provided. The outflow shell 7 is located on the outer wall of the main body 1 and is located around the cylindrical section 107. The outflow shell 7 has an auxiliary flow channel 701, and the auxiliary flow channel 701 is provided with an auxiliary liquid inlet 705 and an auxiliary liquid outlet 702. The auxiliary liquid inlet 705 is connected to the upper cylindrical cavity 112, and the auxiliary liquid outlet 702 is connected to the lower cylindrical cavity 113. In actual operation, through the setting of the auxiliary flow channel 701, on the basis of ensuring the original liquid flow of the cylindrical section 107, another auxiliary flow channel 701 is provided for the whole body formed by the float 2 and the sliding block 6. The liquid flow flowing out of the auxiliary liquid outlet 702 merges into the lower cylindrical cavity 113, effectively ensuring the original liquid flow diameter and state. This design not only enhances the driving force on the float 2 and the sliding block 6 as a whole, ensuring their stable sliding in the cylindrical section 107 , but also helps to maintain the stability and flow rate of the liquid flow, thereby improving the measurement accuracy and reliability of the flowmeter in the cylindrical section 107 .

[0060] Furthermore, the outer flow shell 7 is an annular shell, the inner wall of the auxiliary flow channel 701 has an inner conical surface 703, and further includes:

[0061] The block 8 is arranged around the sliding block 6, and the block 8 is a frustum-shaped block 8, the block 8 has an outer conical surface 801, the auxiliary flow channel 701 is surrounded by the inner wall of the outer flow shell 7 and the outer conical surface 801, the auxiliary flow channel 701 has a variable diameter flow channel section 704, and the variable diameter flow channel section 704 is surrounded by the inner conical surface 703 and the outer conical surface 801, and the auxiliary liquid inlet 705, the auxiliary liquid outlet 702 and the variable diameter flow channel section 704 are configured so that after the sliding block 6 drives the block 8 to slide, the auxiliary liquid outlet 702 is enlarged to increase the variable diameter flow channel section 704, or the auxiliary liquid inlet 705 is reduced to reduce the variable diameter flow channel section 704;

[0062] The second elastic member 9 has one end disposed on the sliding block 6 and the other end disposed on the main body 1 , and provides a force for the sliding block 6 to slide toward the inlet 102 .

[0063] In this embodiment, the position of the annular shell is located on the outer wall of the entire main body 1 near the outlet 103. At this position, the liquid flow needs a large pushing effect to make the float 2 produce a stable movement, but it is necessary to ensure the stability of the liquid flow in the main stroke channel 101. In view of this, the present scheme is also provided with a block 8, which has an outer conical surface 801 on the block 8, and a variable diameter flow channel surface is formed between the inner conical surface 703 in the auxiliary flow channel 701. After the sliding block 6 and the block 8 slide down synchronously, the inner diameter of the variable diameter flow channel section 704 is reduced, and the diameter of the liquid flow separated from the variable diameter flow channel section 704 is also reduced, the liquid flow rate will be increased accordingly, and the liquid impact force on the block 8 will also be increased accordingly. In this way, under the state of extremely large flow, the present device can still have sufficient stability and a certain degree of accuracy to detect the flow of large flow liquid flow, which is convenient for operators to carry out emergency treatment and improve the efficiency of subsequent adjustment. The setting of the second elastic member 9 can help the sliding block 6 to reset, and make the sliding block 6 and the float 2 formed by sliding toward the outlet 103 The whole is more stable.

[0064] It should be noted that 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 preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A metal tube float flowmeter, characterized in that: include: A main body (1), the main body (1) having a travel channel (101), the travel channel (101) having an inlet (102) and an outlet (103); A float (2), the float (2) sliding in the travel channel (101); a first elastic member (3), one end of the first elastic member (3) being arranged on the inner wall of the travel channel (101), and the other end of the first elastic member (3) being arranged on the float (2), so as to provide a force for the float (2) to approach the inlet (102); The two ends of the travel channel (101) are provided with limiting parts (104), the two limiting parts (104) are symmetrically arranged, and the ends of the two limiting parts (104) close to each other are provided with a stopper (105), one end of the first elastic member (3) is arranged on the stopper (105) close to the outlet (103), and the float (2) slides close to or away from the stopper (105) close to the inlet (102); The travel channel (101) has a first conical section (106) and a cylindrical section (107); the outlet (103) is located at one end of the cylindrical section (107); the first conical section (106) and the cylindrical section (107) are transitionally connected; and the float (2) slides in the first conical section (106) and the cylindrical section (107); A sliding block (6), the sliding block (6) being slidably disposed in the columnar section (107), the sliding block (6) dividing the columnar section (107) into an upper columnar cavity (112) and a lower columnar cavity (113), the upper columnar cavity (112) being located on a side of the lower columnar cavity (113) close to the inlet (102), the sliding block (6) having a side communication port (601) and a central communication port (602), the side communication port (601) and the central communication port (602) both being connected to the upper columnar cavity (112) and the lower columnar cavity (113), and the float (2) being in contact with or out of contact with the sliding block (6) after sliding, and blocking or out of blocking the central communication port (602).

2. A metal tube float flowmeter according to claim 1, characterized in that: The limiting portion (104) and the main body (1) are an integral structure or a separate structure.

3. A metal tube float flowmeter according to claim 1, characterized in that: A liquid flow channel (201) is formed between the float (2) and the inner wall of the stroke channel (101), and the liquid flow channel (201) is configured such that, after the float (2) slides from an end of the first conical section (106) away from the cylindrical section (107) to an end close to the cylindrical section (107), the cross-sectional area of ​​the liquid flow channel (201) increases.

4. A metal tube float flowmeter according to claim 1, characterized in that: The travel channel (101) further comprises a second tapered section (108) and a necking section (109); the first tapered section (106) and the second tapered section (108) are transitionally connected to two ends of the necking section (109), respectively; the second tapered section (108), the necking section (109), the first tapered section (106) and the cylindrical section (107) are arranged in sequence from the inlet (102) to the outlet (103).

5. A metal tube float flowmeter according to claim 4, characterized in that: One end of the first conical section (106) close to the necking section (109) has an inner concave arc surface section (110), and one end of the float (2) close to the necking section (109) has an outer convex arc surface (202).

6. A metal tube float flowmeter according to claim 5, characterized in that: Also includes: a limit block (4), the limit block (4) being arranged on the stop portion (105) on the side close to the inlet (102); after the float (2) slides toward or away from the stop portion (105) on the side close to or away from the inlet (102), the float (2) abuts against or cancels the abutment with the limit block (4), and after the abutment, the float (2) is located in the concave arc surface section (110); An indicator (5), the indicator (5) being arranged on the main body (1), the indicator (5) being magnetically coupled to the float (2), and the main body (1) having mounting portions (111) at both ends.

7. The metal tube float flowmeter according to claim 1, further comprising: An outflow shell (7), the outflow shell (7) being arranged on the outer wall of the main body (1) and being located around the cylindrical section (107), the outflow shell (7) having an auxiliary flow channel (701), the auxiliary flow channel (701) having an auxiliary liquid inlet (705) and an auxiliary liquid outlet (702), the auxiliary liquid inlet (705) being in communication with the upper cylindrical cavity (112), and the auxiliary liquid outlet (702) being in communication with the lower cylindrical cavity (113).

8. The metal tube float flowmeter according to claim 7, wherein the outer flow shell (7) is an annular shell, the inner wall of the auxiliary flow channel (701) has an inner conical surface (703), and further comprising: A blocking block (8), wherein the blocking block (8) is arranged around the sliding block (6), and the blocking block (8) is of a frustum type, the blocking block (8) has an outer conical surface (801), the auxiliary flow channel (701) is surrounded by the inner wall of the outer flow shell (7) and the outer conical surface (801), the auxiliary flow channel (701) has a variable diameter flow channel section (704), and the variable diameter flow channel section (704) is surrounded by the inner conical surface (703) and the outer conical surface (801), and the auxiliary liquid inlet (705), the auxiliary liquid outlet (702) and the variable diameter flow channel section (704) are configured such that after the sliding block (6) drives the blocking block (8) to slide, the auxiliary liquid outlet (702) is enlarged to increase the variable diameter flow channel section (704), or the auxiliary liquid inlet (705) is reduced to reduce the variable diameter flow channel section (704); A second elastic member (9), one end of the second elastic member (9) being arranged on the sliding block (6) and the other end being arranged on the main body (1), providing a force for the sliding block (6) to slide in a direction close to the inlet (102).

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