CN111365485A

CN111365485A - Pneumatic adjustable flow batching valve

Info

Publication number: CN111365485A
Application number: CN202010321629.1A
Authority: CN
Inventors: 徐加贵; 王凯; 余社庆; 季骏; 杨玉荣
Original assignee: Baoying Renheng Industrial Co ltd
Current assignee: Baoying Renheng Industrial Co ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-07-03

Abstract

According to the pneumatic adjustable flow proportioning valve provided by the invention, in a large-flow state, the primary cylinder and the secondary cylinder are both in a compressed state, and feed liquid enters the primary cylinder through the primary feed port and enters the proportioning tank through the primary discharge port; at the last stage of material mixing, extending a first-stage cylinder, pushing a small flow controller by a first-stage piston rod, clamping and sealing a second-stage discharge hole and the first-stage discharge hole, enabling the material liquid to enter a second-stage cylinder body through a first-stage feed hole and a second-stage feed hole, entering a material mixing tank through the second-stage discharge hole, enabling the flow to be small at the moment, and being suitable for accurate material mixing; the parts contacted with the feed liquid are subjected to corrosion resistance treatment, the parts do not have parts with higher structural requirements, the sealing performance cannot be reduced due to a small amount of corrosion, the switching of large flow, small flow and closing can be completed by the matching of the combined cylinder, the automation degree is high, and the switching speed is high.

Description

Pneumatic adjustable flow batching valve

Technical Field

The invention relates to the field of machinery, in particular to a pneumatic adjustable flow proportioning valve device.

Background

The batching valve used when the cigarette factory carries out the automatic preparation of the essence and the spice mainly has the following schemes: firstly, a pneumatic ball valve and a throttle valve are added; secondly, adding a V-shaped pneumatic ball valve into the valve positioner; thirdly, an integrated anti-drip type dispensing valve; the first of these solutions has the disadvantage that the throttle valve is easily blocked, which may result in no dosing; the second scheme has the defects that the number of parts is large, and dripping leakage of a pipeline is inevitable after the batching is finished; at present, the third scheme is mainly adopted for integrating the drip-proof dispensing valve.

Like CN102758923A integration antidrip formula batching valve, through the control that receives two combination cylinders and compression spring of low discharge cone valve and large-traffic cone valve, compression spring enables the piston pressure head and presses on the discharge gate, and another compression spring enables the toper end cap and presses on thin discharge gate, can produce three kinds of operating condition: a discharge port is in a completely closed state, a small-diameter fine discharge port of the discharge port is in an open state, and the discharge port is in a completely open state; the integrated drip-proof dispensing valve is simple in structure, solves the problem of dripping of a pipeline, but after long-term use, the drip-proof effect can be gradually deteriorated, the liquid has corrosivity when the essence and spice are automatically prepared, although the spring is made of a corrosion-resistant material, the mechanical property of the spring can be greatly weakened after the spring is used for a period of time because the spring is immersed in the liquid, and the spring is difficult to resist against a conical plug, so that the liquid leakage can affect the dispensing effect.

Disclosure of Invention

In order to solve the above problems, the present invention provides the following technical solutions:

the pneumatic adjustable flow batching valve comprises a combined cylinder, a valve head and a small flow controller, wherein the valve head comprises a primary cylinder body, a primary feeding hole is formed in the side surface of the primary cylinder body, a primary discharging hole is formed in one end of the primary cylinder body, and the other end of the primary cylinder body is connected with the combined cylinder;

the combined air cylinder comprises a first-stage air cylinder and a second-stage air cylinder, the first-stage air cylinder comprises a first-stage cylinder barrel, a first-stage end cover, a first-stage piston and a first-stage piston rod, the second-stage air cylinder comprises a second-stage cylinder barrel, a second-stage end cover, a second-stage piston and a second-stage piston rod, one end of the first-stage cylinder barrel is connected with the first-stage cylinder barrel, the other end of the first-stage cylinder barrel is connected with one end of the second-stage cylinder barrel, the other end of the second-stage cylinder barrel is the second-stage end cover, through holes are formed in the middle parts of the first-stage piston and the first-stage piston rod;

the small flow controller comprises a secondary cylinder, a secondary feed inlet is formed in the side face of the secondary cylinder, a secondary discharge outlet is formed in one end of the secondary cylinder, and the other end of the secondary cylinder is connected with a primary piston rod;

the outside of second grade discharge gate can cooperate the block with the inboard of one-level discharge gate to be sealed, the second grade piston rod can extend and get into in the second grade barrel to block up the second grade discharge gate.

Furthermore, a matched clamping position between the outer side of the second-stage discharge port and the inner side of the first-stage discharge port is provided with an O-shaped sealing ring.

Furthermore, the first-stage cylinder, the second-stage cylinder, the first-stage discharge port, the second-stage discharge port, the first-stage cylinder, the second-stage cylinder, the first-stage piston, the second-stage piston, the first-stage piston rod and the second-stage piston rod are all arranged coaxially.

Further, when the outside of second grade discharge gate and the inboard cooperation joint of one-level discharge gate, one-level feed inlet and second grade feed inlet are coaxial.

Furthermore, a first-stage tension spring is uniformly arranged between the first-stage piston and the first-stage end cover along the circumference, and a second-stage tension spring is uniformly arranged between the second-stage piston and the second-stage end cover along the circumference.

Furthermore, the sectional area of the first-stage feed inlet is 5-10 times of that of the second-stage feed inlet, and the sectional area of the first-stage discharge outlet is 5-10 times of that of the second-stage discharge outlet.

The invention has the beneficial effects that: through the connection of the combined cylinder and the valve head, the first-stage cylinder and the second-stage cylinder are both in a compressed state, the outer side of the second-stage discharge port is separated from the inner side of the first-stage discharge port, the material liquid enters the first-stage cylinder through the first-stage feed port and then enters the batching tank through the first-stage discharge port, at the moment, in the last stage of batching, in order to be accurate, the flow needs to be reduced, through extending the first-stage cylinder, the first-stage piston drives the first-stage piston rod to push the small flow controller, the outer side of the second-stage discharge port is clamped and sealed with the inner side of the first-stage discharge port, the material liquid enters the second-stage cylinder through the second-stage feed port after passing through the first-stage feed port and then enters the batching tank through the second-, the secondary piston drives the secondary piston rod to move to one end of the secondary piston rod, which plugs the secondary discharge hole, and the channel for the feed liquid to enter the batching tank is plugged, so that batching is finished; the parts contacted with the feed liquid are subjected to corrosion resistance treatment, the parts do not have parts with higher requirements on the structure by mechanical properties such as springs, the sealing property cannot be reduced due to a small amount of corrosion, the switching of large flow, small flow and closing can be smoothly completed by the matching of the combined cylinder, the automation degree is high, and the switching speed is high;

an O-shaped sealing ring is arranged at the matched clamping position between the outer side of the secondary discharge port and the inner side of the primary discharge port, so that the sealing performance between the two is further enhanced, and liquid leakage is effectively prevented; the coaxial arrangement among the components enables the matching among the components to be more accurate; the tension spring in the combined cylinder is arranged to compress and extend the cylinder to a specified position when the combined cylinder is matched with the cylinder; the sectional area of the first-stage feed inlet is 5-10 times of that of the second-stage feed inlet, and the sectional area of the first-stage discharge outlet is 5-10 times of that of the second-stage discharge outlet, and the sectional area can be adjusted according to the accuracy requirement of the ingredients; the invention has the advantages of ingenious design, simple structure, strong practicability and suitability for popularization.

Drawings

FIG. 1 is a cross-sectional schematic view of a valve head;

FIG. 2 is a schematic cross-sectional view of a small flow controller;

FIG. 3 is a schematic cross-sectional view of a combination cylinder;

FIG. 4 is a schematic cross-sectional view of a pneumatically adjustable flow dispensing valve in a high flow state;

FIG. 5 is a schematic cross-sectional view of a pneumatically adjustable flow dispensing valve in a low flow state;

FIG. 6 is a schematic cross-sectional view of a pneumatically adjustable flow proportioning valve in a closed condition.

In the figure: 1-first-stage cylinder, 2-first-stage feed inlet, 3-first-stage feed inlet, 4-first-stage cylinder barrel, 5-first-stage piston, 6-first-stage piston rod, 7-first-stage end cover, 8-through hole, 9-second-stage cylinder barrel, 10-second-stage piston, 11-second-stage piston rod, 12-second-stage end cover, 13-first-stage tension spring, 14-second-stage tension spring, 15-second-stage cylinder barrel, 16-second-stage feed inlet, 17-second-stage discharge outlet and 18-O-type sealing ring.

Detailed Description

In order to make the technical means, features and functions of the present invention easier to understand, the technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the detailed description and the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

the pneumatic flow-adjustable batching valve comprises a combined cylinder, a valve head and a small flow controller, wherein as shown in figure 1, the valve head comprises a primary cylinder body 1, a primary feeding hole 2 is formed in the side surface of the primary cylinder body 1, a primary discharging hole 3 is formed in one end of the primary cylinder body 1, and an O-shaped sealing ring 18 is further arranged on the inner side of the primary discharging hole 3; as shown in fig. 2, the small flow controller includes a secondary cylinder 15, a secondary feed inlet 16 is arranged on a side surface of the secondary cylinder 15, a secondary discharge outlet 17 is arranged at one end of the secondary cylinder 15, an outer side of the secondary discharge outlet 17 can be engaged with an inner side of the primary discharge outlet 3, and the O-shaped sealing ring 18 can play a role in sealing between the two; as shown in fig. 3, the combined cylinder comprises a first-stage cylinder and a second-stage cylinder, the first-stage cylinder comprises a first-stage cylinder barrel 4, a first-stage piston 5, a first-stage piston rod 6, a first-stage end cover 7 and a first-stage tension spring 13, the second-stage cylinder comprises a second-stage cylinder barrel 9, a second-stage piston 10, a second-stage piston rod 11, a second-stage end cover 12 and a second-stage tension spring 14, one end of the first-stage cylinder barrel 4 is connected with the first-stage cylinder barrel 1, the other end of the first-stage cylinder barrel 4 is the first-stage end cover 7, the first-stage end cover 7 is connected with one end of the second-stage cylinder barrel 9, the other end of the second-stage cylinder barrel 9 is the second-stage end cover 12, the first-stage cylinder barrel 4 and the second-stage cylinder barrel 9 are coaxially arranged, the axes of the first-stage piston 5 and the first-, the secondary piston rod 11 penetrates through a connecting part of the primary end cover 7 and the secondary cylinder barrel 9 to be inserted into the through hole 8 and penetrates through the center of the primary piston rod 6, primary tension springs 13 are uniformly arranged between the primary piston 5 and the primary end cover 7 along the circumference, and secondary tension springs 14 are uniformly arranged between the secondary piston 10 and the secondary end cover 12 along the circumference;

as shown in fig. 4, the pneumatic flow-adjustable proportioning valve is in a large flow state, the primary piston rod 6 is connected with the secondary cylinder 15, the primary cylinder 4 is connected with the primary cylinder 1, the secondary piston rod 11 extends into the secondary cylinder 15, and the primary cylinder 1, the secondary cylinder 15 and the primary cylinder 4 are coaxially arranged; the primary cylinder and the secondary cylinder are both in a compressed state, the primary tension spring 13 and the secondary tension spring 14 are both in a lowest tension state, feed liquid enters the primary cylinder body 1 through the primary feed port 2 and enters the batching tank through the primary discharge port 3, at the moment, the small flow controller does not play a role in control, and the pneumatic adjustable flow batching valve is in a large flow state;

as shown in fig. 5, the pneumatic adjustable flow proportioning valve is in a small flow state, the secondary cylinder is in a compressed state, the secondary tension spring 14 is in a lowest tension state, the primary cylinder is in an extended state, the primary tension spring 13 is extended to a highest tension state, during the extension of the primary cylinder, the primary piston 5 pushes the primary piston rod 6 to drive the small flow controller to move forward until the outer side of the secondary discharge port 17 is clamped and sealed with the inner side of the primary discharge port 3 through the O-ring 18, the secondary feed port 16 is aligned with the primary feed port 2, the cross section of the secondary feed port 16 is coaxial with the cross section of the primary feed port 2, the feed liquid enters the secondary feed port 16 through the primary feed port 2, the feed liquid enters the proportioning tank through the secondary discharge port 17 through the secondary cylinder 15, the cross section of the primary discharge port 3 is 10 times of, under the condition of the same flow speed, the flow is reduced to 10% of the original flow, at the moment, the small flow controller plays a role in controlling the flow, and the pneumatic adjustable flow proportioning valve is in a small flow state;

as shown in fig. 6, the pneumatic adjustable flow proportioning valve is in a closed state, the primary cylinder and the secondary cylinder are both in an extended state, the primary tension spring 13 and the secondary tension spring 14 are both extended to a state with the highest tension, the transition from the small flow state to the closed state of the pneumatic adjustable flow proportioning valve is the extension process of the secondary cylinder, the secondary piston 10 pushes the secondary piston rod 11 to move forward until the secondary piston rod 11 abuts against the tail part of the secondary discharge port 17 to block the secondary feed port 17, and the feed liquid cannot enter the proportioning tank through the secondary feed port, so that the pneumatic adjustable flow proportioning valve is in the closed state;

through the connection among the combined cylinder, the valve head and the small flow controller, the step-by-step movement of the first-stage cylinder and the second-stage cylinder can smoothly complete the switching of large flow, small flow and closing, the automation degree is high, the switching speed is high, the parts in contact with the material liquid are subjected to corrosion resistance treatment, the parts do not have parts with higher requirements on the structure by mechanical properties such as springs, and the sealing performance cannot be reduced due to a small amount of corrosion.

Example 2

Different from the embodiment 1, the sectional area of the first-stage discharge port 3 is 5 times of that of the second-stage discharge port 17, and when the pneumatic adjustable flow proportioning valve is in a low flow state, the flow is reduced to 20% of the original flow under the condition of the same flow speed.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification or equivalent substitution made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The pneumatic flow-adjustable batching valve is characterized by comprising a combined cylinder, a valve head and a small flow controller, wherein the valve head comprises a primary cylinder body, a primary feeding hole is formed in the side surface of the primary cylinder body, a primary discharging hole is formed in one end of the primary cylinder body, and the other end of the primary cylinder body is connected with the combined cylinder;

2. The pneumatic adjustable flow dispensing valve of claim 1, wherein the mating snap fit between the outside of the secondary outlet and the inside of the primary outlet is provided with an O-ring seal.

3. The pneumatic adjustable flow dispensing valve of claim 2, wherein the primary cylinder, the secondary cylinder, the primary discharge port, the secondary discharge port, the primary cylinder, the secondary cylinder, the primary piston, the secondary piston, the primary piston rod, and the secondary piston rod are all arranged coaxially.

4. The pneumatic adjustable flow dispensing valve of claim 3, wherein the primary inlet is concentric with the secondary inlet when the outer side of the secondary outlet is engaged with the inner side of the primary outlet.

5. The pneumatically adjustable flow dispensing valve of claim 4, wherein a primary tension spring is circumferentially disposed uniformly between said primary piston and said primary end cap, and a secondary tension spring is circumferentially disposed uniformly between said secondary piston and said secondary end cap.

6. A pneumatically adjustable flow dispensing valve as claimed in claim 5, wherein said primary inlet has a cross-sectional area which is 5 to 10 times the cross-sectional area of said secondary inlet, and said primary outlet has a cross-sectional area which is 5 to 10 times the cross-sectional area of said secondary outlet.