CN209892539U

CN209892539U - Improved structure of pneumatic valve

Info

Publication number: CN209892539U
Application number: CN201920083496.1U
Authority: CN
Inventors: 王嘉铭
Original assignee: EASYTORK AUTOMATION CORP
Current assignee: EASYTORK AUTOMATION CORP
Priority date: 2019-01-17
Filing date: 2019-01-17
Publication date: 2020-01-03
Anticipated expiration: 2029-01-17

Abstract

The utility model provides a pneumatic valve improved structure, has valve structure portion, switching part and shuttle valve, the utility model discloses a pneumatic valve matches and connects the valve positioner, is applied to any double acting cylinder, reaches the accurate aperture control of control cylinder; when the air cylinder loses the air source, the air in the air storage chamber can be released through the pneumatic valve, so that the air cylinder reaches a preset safe resetting position.

Description

Improved structure of pneumatic valve

Technical Field

The utility model relates to a pneumatic valve structure indicates a pneumatic valve improvement structure especially, sees through the route change with pneumatic valve inside, makes the pneumatic valve can cooperate valve positioner and shuttle valve to use, reaches the admission pressure, the pressure of giving vent to anger and the safe reset of more accurate control cylinder.

Background

The conventional spring safety resetting cylinder is controlled by using a proportional control valve, and when a wind source is lost, the spring safety resetting cylinder can rebound to reach a safety resetting position preset by the cylinder through the force of the spring; however, the double-acting cylinder can only be used when air pressure is supplied, and when the wind source is lost, although a signal source exists, the double-acting cylinder cannot be operated under the condition of no power, and the double-acting cylinder cannot reach a safe resetting position.

In view of this, the inventor has been able to make a manufacturing development and design experience of related products for many years, and after detailed design and careful evaluation, the utility model with practical applicability is finally obtained.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pneumatic valve improvement structure, its simple structure, the operation maintenance is convenient, the admission pressure, the pressure of giving vent to anger and the safe reset of accurate control cylinder that can be better.

In order to achieve the above object, the utility model discloses a pneumatic valve improvement structure, its characterized in that includes:

a valve structure part, which is axially provided with a sliding chute, a first vent groove, a second vent groove, a first pipeline and a second pipeline in parallel, the side of the valve structure part is respectively provided with an air inlet hole, an air outlet hole, an air chamber air storage hole, a first air chamber hole, a second air chamber hole, an air inlet hole and an air release hole, the bottom of the valve structure part is provided with a bottom plate, the chute is movably provided with a piston shaft, the piston shaft is provided with at least one resisting part and at least one ventilation concave part, the bottom of the piston shaft is provided with an elastic piece, the first vent groove is communicated with the first air chamber hole, the second vent groove is communicated with the second air chamber hole, the first pipeline is communicated with the air inlet and the air outlet, the bottom of the first pipeline is provided with a check valve, the second pipeline is communicated with the first pipeline, the air storage hole of the air chamber and an air exhaust hole, and the air exhaust hole is simultaneously communicated with the sliding chute;

the switching part is arranged above the valve structure part, a single-action connecting pipe is arranged in the switching part, and two ends of the single-action connecting pipe are respectively communicated with the first pipeline and the sliding chute;

the shuttle valve is internally provided with a T-shaped channel, the end part of the T-shaped channel is respectively provided with an input air hole, a first air transmission hole and a second air transmission hole, the bottom of the first air transmission hole is combined with a first through pipe, the other end of the first through pipe is combined with the bottom of the second air transmission groove, and the second air transmission hole and the air inlet hole of the valve structure part are respectively combined with two ends of a second through pipe.

Wherein, the side of the valve structure part is provided with an external air chamber hole which is communicated with the second pipeline, and the external air chamber hole is provided with a leakage stopping piece or an air bottle.

The air chamber air storage hole is communicated with an IB hole site of an air cylinder, the first air chamber hole is communicated with an IC hole site of the air cylinder, and the second air chamber hole is communicated with an ID hole site of the air cylinder.

Wherein, the air inlet is communicated with an air source, and the air outlet is communicated with a valve positioner.

Through the structure, the utility model discloses mainly to the improvement of pneumatic valve internal line for but pneumatic valve piping connection this shuttle valve and this valve positioner see through the input signal to this valve positioner, reach the accurate control and the safe normal position of resetting of a cylinder inlet pressure, pressure of giving vent to anger, and operate more portably stably, be suitable for more extensively.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a perspective exploded view of the present invention.

Fig. 3 is a perspective view (i) of the present invention.

Fig. 4 is a perspective view of the present invention (ii).

Fig. 5 is a schematic perspective view of the valve structure of the present invention in combination with the cylinder, the air source and the valve positioner.

Fig. 6 is a perspective view of the cylinder of fig. 5.

FIG. 7 is a schematic cross-sectional view taken generally along line 7-7 of FIG. 1, illustrating the delivery of gas from a gas source to the valve structure portion and to the valve positioner.

FIG. 8 is a schematic cross-sectional view taken generally from 8 to 8 of FIG. 1, showing a gas supply delivering gas to the valve structure portion and then to the valve positioner, where the gas is supplied from the valve positioner in two portions, one portion returning directly to the valve structure portion and the other portion returning to the valve structure portion after passing to the shuttle valve.

Fig. 9 is a schematic cross-sectional view taken along line 9-9 of fig. 1, illustrating the gas inlet to the first and second venting grooves of the valve structure portion of fig. 8.

Fig. 10 is a schematic view of the section 8-8 of fig. 1, showing the safety of the cylinder after the gas supply stops, the gas is supplied from the gas storage chamber of the cylinder to the valve structure portion, and the gas returns to the valve structure portion again through the shuttle valve.

FIG. 11 is a schematic cross-sectional view taken along line 9-9 of FIG. 1, illustrating FIG. 10 gas inlet to the second vent channel of the valve structure.

Fig. 12 is a schematic sectional view of fig. 1 taken along line 8-8, which shows the cylinder being returned to its safe position, supplied with air from the air source, and exhausted at the moment of re-operation.

FIG. 13 is a schematic cross-sectional view taken along line 9-9 of FIG. 1, illustrating FIG. 12 gas inlet to the second vent channel of the valve structure.

Fig. 14 is a schematic diagram showing the operation of the valve positioner by controlling the intake pressure and exhaust pressure of the cylinder with the pneumatic valve of the present invention to make the intake pressure of the first air channel greater than the intake pressure of the second air channel.

Fig. 15 is a schematic diagram of the operation of the valve positioner controlling the air intake pressure of the cylinder by the pneumatic valve of the present invention to make the air intake pressure of the second air channel greater than the air intake pressure of the first air channel.

FIG. 16 is a schematic view of the valve positioner fully actuated from the first vent slot with the supply air.

FIG. 17 is a schematic view of the operation of the air supply with the valve positioner fully inflated from the second vent slot.

Fig. 18 is a schematic diagram of the operation of the pneumatic valve to achieve safe resetting of the cylinder by supplying air from the air source through the air storage chamber of the cylinder without supplying air.

FIG. 19 is a schematic view of the cylinder being returned to safety and then being vented by the air supply at the instant of re-operation.

Detailed Description

The following detailed description of the embodiments of the present disclosure will be given with reference to the accompanying drawings. Aside from the details given herein, this invention is capable of general implementation in other embodiments and many alternatives, modifications, and equivalents may be devised in any of these embodiments without departing from the spirit and scope of the present invention as defined by the appended claims. In the description of the specification, numerous specific details are set forth in order to provide a thorough understanding of the present invention; however, the present invention may be practiced without some or all of these specific details. In other instances, well-known steps or elements have not been described in detail so as not to unnecessarily obscure the present invention. The same or similar elements in the drawings will be denoted by the same or similar symbols. It is specifically noted that the drawings are for illustrative purposes only and do not represent actual dimensions or quantities of elements unless specifically stated otherwise.

Referring to fig. 1 to 4, an improved pneumatic valve is disclosed, which includes a valve structure portion 10, a switching portion 20 and a shuttle valve 30.

The valve structure portion 10 is axially provided with a sliding slot 11, a first vent slot 13, a second vent slot 14, a first pipeline 15 and a second pipeline 16 in parallel, the side of the valve structure portion 10 is respectively provided with an air inlet hole 171, an air outlet hole 172, an air chamber air storage hole 173, a first air chamber hole 174, a second air chamber hole 175, an air inlet hole 176 and an air release hole 177, the bottom of the valve structure portion 10 is provided with a bottom plate 18, the sliding slot 11 is movably provided with a piston shaft 12, the piston shaft 12 is provided with at least one resisting portion 121 and at least one vent concave portion 122, the bottom of the piston shaft 12 is provided with an elastic member 123, the first vent slot 13 is communicated with the first air chamber hole 174, the second vent slot 14 is communicated with the second air chamber hole 175, the first pipeline 15 is communicated with the air inlet hole 171 and the air outlet hole 172, the bottom of the first pipeline 15 is provided with a check valve 151, and the second pipeline 16 is communicated with the first pipeline 15, The air chamber air storage hole 173 and an air outlet hole 1731, the air outlet hole 1731 is connected to the chute 11. In addition, the valve structure portion 10 may be further provided with an external air chamber hole 178 at a side edge, the external air chamber hole 178 is communicated with the second pipeline 16, the external air chamber hole 178 is provided with a leakage-stopping member 1781 to prevent leakage or a gas cylinder is provided as an additional gas source.

The switching portion 20 is disposed above the valve structure portion 10, a single-acting connection tube 21 is disposed inside the switching portion 20, and two ends of the single-acting connection tube 21 are respectively communicated with the first pipeline 15 and the chute 11.

The interior of the shuttle valve 30 is opened with a T-shaped channel 31, the end of the T-shaped channel 31 is opened with an input air hole 32, a first air transmission hole 33 and a second air transmission hole 34, the bottom of the first air transmission hole 33 is combined with a first through pipe 41, the other end of the first through pipe 41 is combined with the bottom of the second air transmission groove 14, and the second air transmission hole 34 and the air input hole 176 of the valve structure portion 10 are combined with two ends of a second through pipe 42 respectively.

Referring to fig. 5, the valve structure portion 10 of the pneumatic valve is combined with a cylinder 50, a gas source 60 and a valve positioner 70, the shuttle valve 30 is combined with the valve structure portion 10 through the first pipe 41 and the second pipe 42, and the switching portion 20 is disposed at the top of the valve structure portion 10.

Referring to fig. 6 in conjunction with fig. 12 and 14, the cylinder 50 has two actuators 54, a gear shaft 55, a first air chamber 501, two second air chambers 502 and two air chambers 503, the gear shaft 55 is engaged between the actuators 54, so that the actuators 54 are simultaneously moved toward or away from each other, the first air chamber 501 is located between the actuators 54, the second air chambers 502 are respectively located at the other side of the actuators 54 different from the first air chamber 501, the air storage chambers 503 are respectively disposed at both sides of the cylinder 50, and the air storage chambers 503 are communicated with each other, an IB hole 51, an IC hole 52 and an ID hole 53 are formed outside the cylinder 50, the air chamber air hole 173 is connected to the IB hole site 51 and the air storage chambers 503, the first air chamber hole 174 is connected to the IC hole site 52 and the first air containing chamber 501, the second chamber hole 175 communicates with the ID hole 53 and the second air accommodating chambers 502.

Referring to fig. 7 in conjunction with fig. 3 and 4, the air inlet hole 171 of the valve structure portion 10 is communicated with the air source 60, the air outlet hole 172 of the valve structure portion 10 is communicated with the valve positioner 70, the air source 60 provides air, and the air enters the valve structure portion 10 from the air inlet hole 171 and advances toward two channels, one is the first pipeline 15, and the other is the second pipeline 16. When the gas flows along the first pipeline 15, a part of the gas will be led to the single-acting connection pipe 21 of the switching part 20 and then returned from the single-acting connection pipe 21 to the chute 11 of the valve structure part 10; another portion of the gas will exit the valve structure 10 through the outlet aperture 172 and then enter the valve positioner 70. Because the check valve 151 is disposed between the first pipeline 15 and the second pipeline 16, when the gas passes through the check valve 151 from the first pipeline 15 to the second pipeline 16, the gas does not return to the first pipeline 15, and the gas flows along the second pipeline 16 and leaves the valve structure portion 10 from the gas chamber gas storage hole 173.

Referring to fig. 8 and 9 in conjunction with fig. 5 to 7 and 12 to 14, after the gas is introduced into the single-acting connection tube 21 of the switching portion 20, the gas returns to the chute 11 of the valve structure portion 10 along the channel of the single-acting connection tube 21, at this time, the gas pushes the piston shaft 12 downward, so that the piston shaft 12 presses the elastic member 123 downward, and meanwhile, the blocking portion 121 of the piston shaft 12 blocks the gas inlet 176, so that the gas inlet 176 forms a seal. After the other part of the gas enters the valve positioner 70, the valve positioner 70 controls the output pressure of the gas and divides the gas into two parts according to the proportion to output; after the first part of the gas is input into the first ventilation slot 13, the gas exits from the first air chamber hole 174, and then the gas enters into the first air containing chamber 501 from the IC hole 52 of the cylinder 50; a second portion of the gas passes through the input port 32 of the shuttle valve 30, then flows through the T-shaped passage 31 and exits the shuttle valve 30 from the first input port 33, enters the second vent slot 14 of the valve structure 10 through the first through tube 41, and exits through the first chamber port 175, and then enters each of the second gas-containing chambers 502 through the ID ports 53 of the cylinder 50. The forced moving direction of the actuators 54 is changed according to the difference between the gas input pressure of the first portion and the gas input pressure of the second portion.

Referring to fig. 10 and 11 in conjunction with fig. 5, 6 and 18, when the gas source 60 is not supplied with gas, the valve structure portion 10 is not supplied with gas to the valve positioner 70, and the switching portion 20 is not supplied with gas; at this time, the piston shaft 12 in the sliding slot 11 is not pressed by the gas, so the elastic member 123 provides the restoring elastic force, the piston shaft 12 moves upward, the ventilation concave portion 122 is located at the side of the gas inlet hole 176, and the gas inlet hole 176 and the valve structure portion 10 are in a communication state; the valve positioner 70 is not supplied with air, the input air hole 32 of the shuttle valve 30 is not supplied with air, the air is provided by the air storage chambers 503 of the air cylinder 50, the air flows through the air chamber air storage hole 173 to enter the valve structure portion 10, because the air chamber air storage hole 173 is communicated with the exhaust hole 1731, the air flows into the exhaust hole 1731, then enters the chute 11 which is communicated, and then sequentially flows into the second air chamber hole 175 through the second through pipe 42, the second air transmission hole 34, the T-shaped channel 31, the first air transmission hole 33 and the first through pipe 41, so that the air pushes the actuating member 54 to return to the preset position.

Referring to fig. 14 in conjunction with fig. 7 and 8, the gas is input from the inlet hole 171 of the gas source 60, and then the gas is divided into two parts, one part of the gas flows through the first pipeline 15 and the other part of the gas flows through the second pipeline 16. The gas flowing through the second conduit 16 passes through the IB hole site 51 along the gas chamber gas storage hole 173, and then is stored in the gas storage chambers 503. The gas flowing through the first pipeline 15 is also divided into two parts, one part of the gas flows into the switching part 20, the other part of the gas leaves the valve structure part 10 through the gas outlet hole 172 and enters the valve positioner 70, the valve positioner 70 has the function of regulating the gas ratio and the gas delivery pressure, and can be switched according to the requirement of a user, in this embodiment, the gas pressure output to the first vent groove 13 by the valve positioner 70 is higher, and the gas passes through the IC hole 52 of the cylinder 50 through the first chamber hole 174 and enters the first gas containing chamber 501; the valve positioner 70 outputs another portion of the smaller gas to the second venting groove 14, and the gas then passes through the ID hole 53 of the cylinder 50 via the second chamber hole 175 and enters the second gas-containing chambers 502, because the gas pressure of the first gas-containing chamber 501 is greater than that of the second gas-containing chambers 502, the gas pressure of the first gas-containing chamber 501 pushes the actuators 54 to move toward the second gas-containing chambers 502, and meanwhile, because the second gas-containing chambers 502 have gas therein, the actuators 54 can be prevented from impacting the inner wall of the cylinder 50 due to the fast moving speed.

Referring to fig. 15 in conjunction with fig. 7 and 8, fig. 15 and 14 only differ in the gas supply ratio of the valve positioner 70, and the pressure of the intake gas flowing into the first ventilation groove 13 is small, so that the pressure of the gas in the first gas containing chamber 501 is small; the pressure of the inlet air flowing into the second air channel 14 is high, so that the pressure of the air in the second air chamber 502 is high, and the actuators 54 are controlled to move toward each other, and the air in the first air chamber 501 can reduce the possibility that the actuators 54 approach toward each other too fast and hit the inner wall of the cylinder 50.

Referring to fig. 16 in conjunction with fig. 7 and 8, the valve positioner 70 is shown fully feeding air from the first vent channel 13. First, gas is input from the gas inlet 171 of the gas source 60, and then the gas is divided into two parts, one part of the gas flows through the first pipe 15 and the other part of the gas flows through the second pipe 16. The gas flowing through the second conduit 16 passes through the IB hole site 51 along the gas chamber gas storage hole 173, and then is stored in the gas storage chambers 503. The gas flowing through the first pipeline 15 is also divided into two parts, one part of the gas flows into the switching part 20, the other part of the gas leaves the valve structure part 10 through the gas outlet hole 172 and enters the valve positioner 70, the valve positioner 70 regulates the gas to be totally input from the first vent groove 13, and the gas passes through the IC hole site 52 of the cylinder 50 through the first gas chamber hole 174 and enters the first gas containing chamber 501; in the case of the valve positioner 70 not inputting gas into the second vent slot 14, the second gas containing chambers 502 are not gas, so that the gas pressure of the first gas containing chamber 501 pushes the actuators 54 to move toward the second gas containing chambers 502.

Referring to fig. 17 in conjunction with fig. 7 and 8, the valve positioner 70 is shown fully intake from the second vent slot 14. The first ventilation slot 13 is not filled with air, and the second ventilation slot 14 is filled with air to fill the second air containing chamber 502, so that the air in the second air containing chamber 502 pushes the actuating members 54 to move towards each other.

Referring to fig. 18 in conjunction with fig. 10, when the gas source 60 is not supplying gas, the gas is supplied from the gas storage chambers 503 of the cylinder 50, the gas enters the valve structure portion 10 through the IB hole site 51 via the gas storage holes 173, since the gas storage holes 173 are communicated with the gas vent hole 1731, the gas returns to the first pipeline 15 again along the gas vent hole 1731, the gas leaves the valve structure portion 10 from the gas outlet hole 172 and enters the valve positioner 70, the valve positioner 70 is controlled to make the gas pass through the second gas through slot 14 and leave the valve structure portion 10 from the second gas chamber hole 175, and the gas enters the second gas containing chambers 502 via the ID hole site 53, and the actuators 54 are pushed to approach each other by the gas, so as to achieve the effect of safe resetting of the cylinder 50; the actuators 54 approaching each other push the gas in the first gas chamber 501 through the IC hole 52 into the first chamber hole 174, and the gas exits the valve structure 10 from the first vent groove 13 to the valve positioner 70 and is exhausted through the valve positioner 70.

Referring to fig. 19 in conjunction with fig. 12, at the moment the gas source 60 provides gas, the piston shaft 12 pushes down against the elastic member 123, so that the vent recess 122 and the gas inlet hole 176 form a channel; after the cylinder 50 is safely restored, the gas in the second gas-containing chamber 502 will exit from the ID hole 53, enter the second vent groove 14 of the valve structure 10 from the second gas chamber hole 175, enter the shuttle valve 30 through the first tube 41, pass through the T-shaped channel 31 and exit from the second gas transmission hole 34, then pass through the second tube 42, pass through the channel formed by the vent recess 122 and the gas inlet 176, and then be discharged from the gas release hole 177.

Claims

1. An improved structure of a pneumatic valve is characterized by comprising:

2. The improved pneumatic valve as claimed in claim 1, wherein an external air chamber hole is formed at a side of the valve structure, the external air chamber hole is connected to the second pipeline, and a leakage stopping member or an air bottle is disposed at the external air chamber hole.

3. The improved pneumatic valve as claimed in claim 1, wherein the air chamber air storage hole is connected to an IB hole site of an air cylinder, the first air chamber hole is connected to an IC hole site of the air cylinder, and the second air chamber hole is connected to an ID hole site of the air cylinder.

4. The improved pneumatic valve as set forth in claim 1, wherein said inlet port is connected to a source of air and said outlet port is connected to a valve positioner.