Spring for controlling opening and closing of control valve of fluid conveying device and conveying device

Abstract

The utility model provides a spring for controlling the opening and closing of a control valve of a fluid conveying device and the conveying device, the spring comprises a spiral wire-shaped metal ring, and the product of the effective number of turns and the wire diameter of the spiral wire-shaped metal ring is less than 20% of the minimum height of the movement of a channel. Through the optimal design of the paste flowing channel and the optimal design of the valve and the opening and closing control spring, the flowing resistance of the paste is reduced. According to the size and shape setting of the channel, the valve and the spiral-wire-shaped metal ring, when high-viscosity paste flows through the channel, only a laminar flow wake at the rear edge of the bluff body at the circular end is generated, so that the paste only generates free jet flow, the laminar flow uniform flowing proportion of the high-viscosity paste is remarkably increased, the turbulent flow proportion is remarkably reduced, and the high-viscosity paste can be formed. Therefore, the flowing resistance of the paste is reduced, the pressing force is reduced, and the use comfort is improved. The jet flow speed can be reduced, and air mixed into the toothpaste is reduced, so that the situation that the toothpaste body is broken is reduced, and the toothpaste extrusion hand feeling and impression are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to elastic device design technical field, specifically, it relates to a spring for controlling fluid conveying device control valve opening and closing and conveying device, especially to a spring for high viscosity fluid conveying device and conveying device control valve opening and closing. BACKGROUND

[0002] There are many manual devices on the market that can extract fluid from a closed container, the principle of which is generally to pump out the fluid in the closed container by pressing. Especially for toothpaste tubes, when toothpaste needs to be squeezed out of the toothpaste tube, the user can pump out the toothpaste from the toothpaste tube by pressing the pump device.

[0003] There is a double-valve vacuum pump and container with piston opening and closing control in the prior art, which comprises a vacuum pump upper valve mechanism, a vacuum pump lower valve mechanism and an inner wall surface of a pump wall jointly defining a buffer cavity, and a vacuum pump return spring located between the vacuum pump upper valve mechanism and the vacuum pump lower valve mechanism. The vacuum pump upper valve mechanism comprises a floating outlet pipe, an upper piston, an upper piston opening and closing control spring and an upper valve. The upper piston inside connected with the floating outlet pipe is provided with a spring accommodating cavity. One end of the spring accommodating cavity is open and communicates with the internal flow channel of the floating outlet pipe, and the other end of the spring accommodating cavity is provided with an upper valve. The upper piston opening and closing control spring is arranged in the spring accommodating cavity. One end of the upper piston opening and closing control spring is fixedly connected with the upper piston, and the other end of the upper piston opening and closing control spring is connected with the upper valve.

[0004] When the double-valve vacuum pump is needed to pump out the high-viscosity fluid in the container, the high-viscosity fluid needs to pass through the spring accommodating cavity. Due to the flow characteristics of the high-viscosity fluid, in the elastic upper valve, there are many sharp edges in the injection molded part, causing boundary jet flow when the paste flows. The boundary jet flow and the surrounding fluid interpenetrate each other, and the momentum transfer occurs between the fluid masses, forming a free shear layer, and at the same time, the surrounding fluid is continuously rolled into this shear layer, so that the width of the jet body continuously increases, and the flow of the jet body continuously increases, but the momentum of the jet does not change. At the trailing edge of the sharp flow body, the developed boundary layers on the upper and lower surfaces converge into one body at the trailing edge, flow downstream and form a wake. Due to the momentum exchange between the fluid particles, the minimum velocity of the fluid increases with the flow downstream, the wake also widens, and the average velocity appears. Between the fluid and the dead water area behind the angular bluff body, the fluid and the dead water area behind the angular bluff body are mutually entrained, forming an unstable turbulent vortex, which has the following problems, and needs to be improved.

[0005] 1. Due to the energy loss in the flow process of the high-viscosity fluid, the user needs to apply more driving force to the vacuum pump, which is inconvenient to press.

[0006] 2. Due to poor flow of the toothpaste, jetting occurs. The narrow channel of the toothpaste results in high driving pressure for its flow. The higher the jet speed, the more air is incorporated into the toothpaste, causing it to break down and affecting the feel and appearance of the toothpaste after squeezing. Utility Model Content

[0007] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a spring and conveying device for controlling the opening and closing of the control valve of a fluid conveying device.

[0008] According to this utility model, a spring for controlling the opening and closing of a control valve in a fluid conveying device includes a spiral wire metal ring, wherein the product of the effective number of turns and the wire diameter of the spiral wire metal ring is less than 30% of the minimum height of the upper piston channel movement; it also includes a shoulder sleeve, a movable pressure head, a paste outlet tube, an elastic device, an upper piston, and a storage bin; the movable pressure head and the paste outlet tube are both disposed within the shoulder sleeve, the paste outlet tube is hinged to the movable pressure head, the upper piston is connected to the paste inlet end of the paste outlet tube, the internal channel of the upper piston communicates with the paste outlet channel of the paste outlet tube, the elastic device is disposed between the movable pressure head and the upper piston, the internal channel of the upper piston communicates with the storage bin through a connecting hole, a small valve plate and a spring are disposed inside the upper piston, the spring is disposed within the internal channel of the upper piston; the spring and the small valve plate cooperate to close the connecting hole, isolating the internal channel of the upper piston from the storage bin; when the small valve plate moves into the internal channel of the upper piston, the connecting hole opens, and the internal channel of the upper piston communicates with the storage bin.

[0009] Preferably, the ratio of the diameter of the spiral filament metal ring to the diameter of the upper piston channel is less than 6%.

[0010] Preferably, the cross-sectional diameter of the upper piston channel is less than 11 mm.

[0011] Preferably, the diameter of the spiral filament metal ring is less than 0.5 mm, and the free length of the spiral filament metal ring is not greater than 10 mm.

[0012] Preferably, the effective number of coils in the spiral filament metal coil is less than 5. The effective number of coils refers to the number of spring coils that participate in elastic deformation and compression. The number of coils that are fixed at both ends and the number of small spring coils that enter the floating guide tube and do not participate in elastic deformation are not included and are not considered as effective coils.

[0013] Preferably, the upward edges of the parts through which the paste passes are rounded.

[0014] Preferably, it also includes a closed cavity, a large valve plate, and a large piston. The shoulder sleeve is connected to the discharge end of the closed cavity, the large piston is movably disposed at the bottom of the closed cavity, the large valve plate is disposed at the discharge port of the closed cavity, and a storage bin is formed between the large valve plate and the upper piston.

[0015] Preferably, one end of the spring is fixed relative to the lower end of the ointment tube, and the other end of the spring is fixed relative to the small valve plate; the end of the spring includes a small ring and / or a crossbar, and the small ring and / or crossbar at the end of the spring that is fixed relative to the small valve plate is pressed against the small valve plate.

[0016] Preferably, the two ends of the spring can be set to have different shapes and sizes, or they can be set to be the same.

[0017] According to the present invention, a conveying device employs a spring for controlling the opening and closing of a control valve in a fluid conveying device.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By setting the size and shape of the spiral wire metal ring, this utility model ensures that when the paste flows through the spring-loaded channel, it only produces a laminar flow trailing edge with a rounded blunt end. This results in the paste only generating a free jet, thereby achieving uniform laminar flow of the paste, reducing the flow resistance of the paste, reducing the pressing pressure, and improving the comfort of use.

[0020] 2. By designing the channel dimensions, this utility model reduces the driving injection pressure for toothpaste flow, reduces the jet speed, and reduces the air mixed in with the toothpaste, thereby reducing the occurrence of toothpaste breakage and improving the feel and appearance of the toothpaste after extrusion.

[0021] 3. By applying the conveying device to the toothpaste tube structure, this utility model can greatly reduce the pressing pressure when squeezing toothpaste, reducing the required pressing pressure from nearly 30 Newtons to less than 18 Newtons. This allows children to easily use vacuum pump-packaged products, and also ensures that no air is introduced into the squeezed high-viscosity paste, preventing the squeezed paste from breaking, improving the aesthetics and enhancing the user experience. Attached Figure Description

[0022] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0023] Figure 1 This is a schematic diagram illustrating the overall structure of the conveying device, which is the main feature of this utility model.

[0024] Figure 2 This is a schematic diagram illustrating the valve structure of the conveying device of this utility model;

[0025] Figure 3 This is a schematic diagram illustrating the overall structure of the small valve plate in this utility model;

[0026] Figure 4 This is a schematic diagram illustrating the spring structure with a small ring and a crossbar of this utility model;

[0027] Figure 5 This is a schematic diagram illustrating the spring structure with a small ring, which is the main feature of this utility model.

[0028] Figure 6 This utility model mainly embodies the structure of small rings of different sizes at both ends of the spring.

[0029] As shown in the figure:

[0030] Spiral filament metal ring 1 Storage bin 7

[0031] Shoulder sleeve 2, connecting hole 8

[0032] 3 movable pressure heads, 9 enclosed chambers

[0033] 4 ointment tubes, 10 large valve plates

[0034] Elastic device 5, large piston 11

[0035] Upper piston 6, small valve plate 12 Detailed Implementation

[0036] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0037] like Figure 1 and Figure 2 As shown, a spring for controlling the opening and closing of a control valve in a fluid conveying device according to the present invention includes a helical wire metal ring 1. The product of the effective number of turns and the wire diameter of the helical wire metal ring 1 is less than 30% of the minimum height of the channel movement. The ratio of the wire diameter of the helical wire metal ring 1 to the diameter of the channel is less than 6%. A circular ring is provided at both ends of the helical wire metal ring 1. The effective number of turns of the helical wire metal ring 1 refers to the number of helical turns in the middle of the helical wire metal ring 1. The material of the helical wire metal ring 1 includes stainless steel, and the cross-sectional shape of the helical wire metal ring 1 includes a circle.

[0038] It should be noted that the minimum height of piston channel movement (H mm) refers to the difference between the height (X mm) from the bottom of the paste tube 4 to the top of the small valve plate 12, and the height (Y mm) when the spring is compressed to the point where all the steel wires are tightly joined, where H = XY. The effective number of turns refers to the number of spring turns that participate in elastic deformation compression. The number of turns that are fixed at both ends, and the number of turns of the small spring that enter the paste tube 4 and do not participate in elastic deformation, are not included and are not considered as effective turns. In this application, the channel refers to the internal channel of the upper piston 6, which is formed by the fit between the bottom of the paste tube 4, the top of the small valve 12, and the inner wall of the upper piston 6.

[0039] Highly viscous fluids, such as toothpaste, require greater pressure to flow and be extruded upwards from the outlet tube when extruded using a pump-type structure due to their high viscosity. Furthermore, the impeded flow of the toothpaste leads to jetting, with narrow channels and high driving pressure. The higher the jet velocity, the more air is incorporated into the toothpaste, causing it to break down and affecting the feel and appearance of the extruded toothpaste.

[0040] This application's technical solution achieves laminar flow by suppressing turbulence in the paste, thereby reducing resistance and pressing force, resulting in a smoother pressing experience. Furthermore, this application also increases the cross-sectional area of ​​the channel, further reducing the flow resistance of the paste as it passes through the channel.

[0041] It should be further explained that high-viscosity pastes have the following characteristics when flowing: 1. Rotational motion; 2. Loss of mechanical energy; 3. Diffusion of vorticity; 4. Instability of flow.

[0042] The work done by the force acting on a unit mass of the paste is not entirely converted into an increase in function. Part of it is the work done by the viscous force on deformation, which is converted into heat energy and lost as mechanical energy. The work done by the viscous force on convection transfers mechanical energy from one layer to another. During fluid movement, due to viscosity, some energy is consumed to overcome viscous resistance, resulting in energy dissipation. Conventional elastic valves, due to the many sharp edges of injection-molded parts, are prone to generating boundary jets during paste flow. These boundary jets mix with the surrounding fluid, and momentum transfer occurs between fluid masses, forming a free shear layer. Simultaneously, the surrounding fluid is continuously drawn into this shear layer, thus increasing the jet width and the flow rate by weight, while the jet momentum remains constant.

[0043] At the trailing edge of a sharp, swirling fluid, the well-developed boundary layers on the upper and lower surfaces merge and flow downstream, forming a wake. Due to momentum exchange between fluid particles, the fluid's lowest velocity increases with downstream flow, widening the wake and resulting in velocity averaging. At the trailing edge of an angular, blunt body, the fluid and the stagnant water zone behind the body mutually entrain each other, forming unstable turbulent vortices. These factors combined significantly increase the frictional resistance of the paste.

[0044] The cross-sectional shape of the spiral wire metal ring 1 of the spring in this application includes a circle, which will only produce a laminar flow wake at the trailing edge of the circular blunt body, so that the paste only produces a free jet, thereby achieving uniform laminar flow of the paste.

[0045] Furthermore, the cross-sectional diameter of the upper piston channel 6 is less than 11 mm. The diameter of the spiral wire metal ring 1 is less than 0.5 mm, and the free length of the spiral wire metal ring 1 is no greater than 10 mm. The effective number of turns of the spiral wire metal ring 1 is less than 5.

[0046] The present invention also provides a conveying device that uses the above-mentioned spring and further includes a shoulder sleeve 2, a movable pressure head 3, a paste outlet tube 4, an elastic device 5, an upper piston 6, and a storage bin 7.

[0047] The movable pressure head 3 and the paste outlet tube 4 are both housed within the shoulder sleeve 2. The paste outlet tube 4 is hinged to the movable pressure head 3. The upper piston 6 is connected to the paste inlet end of the paste outlet tube 4, and its internal channel communicates with the paste outlet channel of the paste outlet tube 4. An elastic device 5 is positioned between the movable pressure head 3 and the upper piston 6. The internal channel of the upper piston 6 communicates with the storage bin 7 through a connecting hole 8. A small valve plate 12 and a spring are installed inside the upper piston 6, with the spring positioned within its internal channel. The spring and the small valve plate 12 cooperate to close the connecting hole 8, isolating the internal channel of the upper piston 6 from the storage bin 7. When the small valve plate 12 moves into the internal channel of the upper piston 6, the connecting hole 8 opens, and the internal channel of the upper piston 6 communicates with the storage bin 7. The elastic device 5 can be a conventional spring or any elastic device.

[0048] It also includes a closed cavity 9, a large valve plate 10 and a large piston 11. The shoulder sleeve 2 is connected to the discharge end of the closed cavity 9. The large piston 11 is movably set at the bottom of the closed cavity 9. The large valve plate 10 is set at the discharge port of the closed cavity 9. A storage bin 7 is formed between the large valve plate 10 and the upper piston 6.

[0049] In this conveying device, the movable pressure head 3 is squeezed, which drives the paste outlet pipe 4, the elastic device 5, and the upper piston 6 downward, causing the small valve plate 12 to float upward. This forces the paste out of the storage bin 7 between the upper piston 6 and the large valve plate 10, creating a negative pressure in the storage bin 7. This releases the movable pressure head 3, which is then reset by the elastic device 5. The small valve plate 12 is also reset by the spring, and the paste outlet pipe 4 is closed. The storage bin 7 between the upper piston 6 and the large valve plate 10 forms a low-pressure space. Under atmospheric pressure, the large valve plate 10 is pushed upward, causing the paste between the closed cavity 9 and the large valve plate 10 to float upward. This pushes open the large valve plate 10, allowing the paste to enter the storage bin 7. The large piston 11 then moves upward along the closed cavity 9.

[0050] It should be noted that the delivery device can be applied to toothpaste tube structures. This can significantly reduce the pressure required when squeezing toothpaste, reducing it from nearly 30 Newtons to below 18 Newtons. This allows even children to easily use vacuum pump-packaged products, and also prevents air from being incorporated into the squeezed high-viscosity paste, ensuring the paste does not break and improving its appearance and user experience.

[0051] Furthermore, the upward edges of the parts through which the paste passes are all rounded. By setting the upward edges of the parts through which the paste passes as rounded, and by setting the size and shape of the spiral wire metal ring, the high-viscosity paste, when flowing through the spring-loaded channel, will only produce a laminar flow wake with a rounded blunt end. As a result, the paste will only produce a free jet, thereby significantly increasing the proportion of laminar and uniform flow of the high-viscosity paste and significantly reducing the proportion of turbulent flow. This reduces the flow resistance of the paste, thereby reducing the pressing pressure and improving the comfort of use.

[0052] like Figure 4 , Figure 5 as well as Figure 6 As shown, in one feasible embodiment of this application, one end of the spring is fixed relative to the lower end of the ointment tube 4, and the other end of the spring is fixed relative to the small valve plate 12. The end of the spring includes a small ring and / or a crossbar, and the small ring and / or crossbar at the end of the spring fixed relative to the small valve plate 12 is pressed against the small valve plate 12. This application sets the end shape of the spring as a small ring or a crossbar, or a combination of a small ring and a crossbar, thereby improving the stability of the pressing between the spring and the small valve 12. It should be noted that the shape and size of the two ends of the spring can be different or the same.

[0053] It should be further noted that the use of the spring and conveying device in this application is not limited to toothpaste tubes. Any application that utilizes the same technical features of this application to solve the same technical problem and achieve the same technical effect falls within the protection scope of this application.

[0054] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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, they should not be construed as limitations on this application.

[0055] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A spring for controlling the opening and closing of a control valve in a fluid conveying device, characterized in that, Includes a spiral filament metal ring (1), wherein the product of the effective number of turns and the wire diameter of the spiral filament metal ring (1) is less than 30% of the minimum height of the upper piston (6) channel movement; It also includes a shoulder sleeve (2), a movable pressure head (3), an ointment outlet tube (4), an elastic device (5), an upper piston (6), and a storage bin (7); The movable pressure head (3) and the paste outlet tube (4) are both located inside the shoulder sleeve (2). The paste outlet tube (4) is hinged to the movable pressure head (3). The upper piston (6) is connected to the paste inlet end of the paste outlet tube (4). The internal channel of the upper piston (6) is connected to the paste outlet channel of the paste outlet tube (4). The elastic device (5) is located between the movable pressure head (3) and the upper piston (6). The internal channel of the upper piston (6) is connected to the storage bin (7) through the connecting hole (8). The upper piston (6) is equipped with a small valve plate (12) and a spring. The spring is located inside the internal channel of the upper piston (6). The spring and the small valve plate (12) cooperate to close the connecting hole (8), and the internal channel of the upper piston (6) is separated from the storage bin (7); The small valve plate (12) moves into the internal channel of the upper piston (6), the connecting hole (8) opens, and the internal channel of the upper piston (6) connects with the storage bin (7).

2. The spring for controlling the opening and closing of a control valve in a fluid conveying device as described in claim 1, characterized in that, The ratio of the diameter of the spiral filament metal ring (1) to the diameter of the upper piston (6) channel is less than 6%.

3. The spring for controlling the opening and closing of a control valve in a fluid conveying device as described in claim 1, characterized in that, The cross-sectional diameter of the upper piston (6) channel is less than 11 mm.

4. The spring for controlling the opening and closing of a control valve in a fluid conveying device as described in claim 3, characterized in that, The diameter of the spiral filament metal ring (1) is less than 0.5 mm, and the free length of the spiral filament metal ring (1) is not greater than 10 mm.

5. The spring for controlling the opening and closing of a control valve in a fluid conveying device as described in claim 1, characterized in that, The effective number of turns of the spiral filament metal ring (1) is less than 5.

6. The spring for controlling the opening and closing of a control valve in a fluid conveying device as described in claim 1, characterized in that, The upward edges of the parts through which the paste passes are all rounded.

7. The spring for controlling the opening and closing of a control valve in a fluid conveying device as described in claim 1, characterized in that, It also includes a closed cavity (9), a large valve plate (10) and a large piston (11). The shoulder sleeve (2) is connected to the discharge end of the closed cavity (9). The large piston (11) is movably disposed at the bottom of the closed cavity (9). The large valve plate (10) is disposed at the discharge port of the closed cavity (9). A storage bin (7) is formed between the large valve plate (10) and the upper piston (6).

8. The spring for controlling the opening and closing of a control valve in a fluid conveying device as described in claim 1, characterized in that, One end of the spring is fixed relative to the lower end of the ointment tube (4), and the other end of the spring is fixed relative to the small valve plate (12); The end of the spring includes a small ring and / or a crossbar, and the small ring and / or crossbar at one end of the spring that is fixed relative to the small valve plate (12) are pressed together with the small valve plate (12).

9. A conveying device, characterized in that, The spring used for controlling the opening and closing of the control valve of the fluid conveying device as described in any one of claims 1-8 is adopted.

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