Pneumatic time delay assembly

Abstract

The utility model provides a pneumatic time-delay assembly which comprises a gas source and a two-position five-way valve, a gas inlet P of the two-position five-way valve is connected with the gas source, a gas outlet A of the two-position five-way valve is connected with a gas inlet of a first buffer gas cylinder, a gas outlet B of the two-position five-way valve is connected with a gas inlet of a second buffer gas cylinder, and the first buffer gas cylinder is connected with a pneumatic control end of a first two-position three-way valve. The air inlet is connected with an air outlet A of the two-position five-way valve; an air inlet P of the first two-position three-way valve is connected with an air source, and an air outlet A is connected with a pneumatic right control end of the two-position five-way valve; the second buffer gas cylinder is connected with a pneumatic control end of the second two-position three-way valve and is connected with a gas outlet B of the two-position five-way valve; an air inlet P of the second two-position three-way valve is connected with an air source, and an air outlet A is connected with the pneumatic left control end of the two-position five-way valve. According to the utility model, pneumatic control is completely adopted, electric drive is not needed, the use safety is high in explosive hazardous gas places, and accurate time delay control can be carried out.

Description

TECHNICAL FIELD

[0001] The utility model relates to time delay equipment technical field, especially point to a kind of pneumatic time delay assembly. BACKGROUND

[0002] In automated production, the time interval between different processes needs to be controlled, and the existing time delay control device mostly uses electric control devices, which requires electric energy. However, in explosive dust and gas hazardous environments, the use of electric energy may generate ignition sources such as electric sparks, leading to explosion accidents. The pneumatic time delay device has good corrosion resistance and adaptability, and can work stably in such environments. However, how to design a pneumatic time delay device to accurately control time is a problem to be solved. SUMMARY

[0003] The utility model provides a kind of pneumatic time delay assembly, completely adopts pneumatic control, without electric drive, it is safe to use in explosive hazardous gas place, and moreover can carry out accurate time delay control.

[0004] The technical scheme of the utility model is realized as follows: a kind of pneumatic time delay assembly, including gas source and two-position five-way valve, the gas inlet P of two-position five-way valve is connected with gas source, the gas outlet A is connected with the gas inlet of first buffer gas bottle, the gas outlet B is connected with the gas inlet of second buffer gas bottle, first buffer gas bottle is connected with the pneumatic control end of first two-position three-way valve, the gas outlet of first buffer gas bottle is connected with the gas outlet A of two-position five-way valve by first check valve;The gas inlet P of first two-position three-way valve is connected with gas source, the gas outlet A is connected with the pneumatic right control end of two-position five-way valve;

[0005] Second buffer gas bottle is connected with the pneumatic control end of second two-position three-way valve, the gas outlet of second buffer gas bottle is connected with the gas outlet B of two-position five-way valve by second check valve;The gas inlet P of second two-position three-way valve is connected with gas source, the gas outlet A is connected with the pneumatic left control end of two-position five-way valve.

[0006] Further, a hand-operated reversing valve is further provided between the first buffer gas bottle and the first two-position three-way valve, the gas inlet R of the left function of the hand-operated reversing valve is connected with the first buffer gas bottle, the gas inlet P of the right function is connected with the gas source, and the gas outlet A of the hand-operated reversing valve is connected with the pneumatic control end of the first two-position three-way valve.

[0007] Further, a first flowmeter is provided between the gas outlet A of the two-position five-way valve and the gas inlet of the first buffer gas bottle; and a second flowmeter is provided between the gas outlet B of the two-position five-way valve and the gas inlet of the second buffer gas bottle.

[0008] Further, a filter and a pressure gauge are further included, and the filter and the pressure gauge are connected with the gas source.

[0009] Further, the first buffer gas cylinder and the second buffer gas cylinder are provided with manual valves for releasing the condensed water in the corresponding buffer gas cylinder.

[0010] The utility model discloses beneficial effect:

[0011] The pneumatic delay assembly of the utility model is operated without electricity, adopts pneumatic control completely, does not need power drive, is safe in explosive dangerous gas place use, and through the cooperation of the gas source, two five-way valves, the first two three-way valves and the second two three-way valves, the inflation and deflation of the first buffer gas cylinder and the second buffer gas cylinder are controlled accurately.

[0012] The utility model discloses the setting of manual reversing valve, in special emergency, when the air pressure of the first buffer gas cylinder cannot drive the first two three-way valves, personnel intervention is convenient, and the gas source can drive the first two three-way valves through the manual reversing valve. DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description is only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.

[0014] Figure 1 It is the structural schematic diagram of pneumatic delay assembly.

[0015] Two five-way valves 1, first buffer gas cylinder 2, first two three-way valves 3, gas source 4, second buffer gas cylinder 5, second two three-way valves 6, filter 7, pressure gauge 8, manual valve 9, first flowmeter 10, second flowmeter 11, first one-way valve 12, second one-way valve 13. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiment of the utility model will be clearly and completely described in the following by combining the drawings in the embodiment of the utility model, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by ordinary skilled person in the art without paying creative labor belong to the protection scope of the utility model.

[0017] Embodiment 1

[0018] As Figure 1As shown, a pneumatic delay assembly includes a gas source 4, a two-position five-way valve 1, a first buffer gas cylinder 2 and a first two-position three-way valve 3. The two-position five-way valve 1 is initially in the right position (the inlet P is communicated with the outlet A, and the outlet B is communicated with the exhaust hole S). The inlet P of the two-position five-way valve 1 is connected with the gas source 4, the outlet A is connected with the inlet of the first buffer gas cylinder 2, and the exhaust port R is connected with an execution assembly. The gas source 4 charges the first buffer gas cylinder 2 through the inlet P and the outlet A of the two-position five-way valve 1.

[0019] The first buffer gas cylinder 2 is connected with the pneumatic control end of the first two-position three-way valve 3. When the gas pressure in the first buffer gas cylinder 2 reaches a set value, the gas pressure in the first buffer gas cylinder 2 causes the left and right position functions of the first two-position three-way valve 3 to change. The inlet P of the first two-position three-way valve 3 is connected with the gas source 4, and the outlet A is connected with the pneumatic right control end of the two-position five-way valve 1. When the gas pressure in the first buffer gas cylinder 2 reaches a set value, the gas pressure in the first buffer gas cylinder 2 causes the left position function (the inlet R is communicated with the outlet A) of the first two-position three-way valve 3 to change to the right position function (the inlet P is communicated with the outlet A). The pressure of the gas source 4 acts on the pneumatic right control end of the two-position five-way valve 1 through the inlet P and the outlet A of the first two-position three-way valve 3, so that the two-position five-way valve 1 changes to the left position function (the inlet P and the outlet B are communicated, and the outlet A and the exhaust hole R are communicated). The first two-position five-way valve 1 is driven by the gas source 4, and the working responsiveness of the first two-position five-way valve 1 is better. The outlet of the first buffer gas cylinder 2 is connected with the outlet A of the two-position five-way valve 1 through the first one-way valve 12, and the high-pressure gas in the first buffer gas cylinder 2 is released through the outlet A and the exhaust hole R of the two-position five-way valve 1.

[0020] The outlet B of the two-position five-way valve 1 is connected with the inlet of the second buffer gas cylinder 5. When the two-position five-way valve 1 changes to the left position function (the inlet P and the outlet B are communicated), the gas source 4 charges the second buffer gas cylinder 5 through the inlet P and the outlet B of the two-position five-way valve 1, and at the same time, the outlet B of the first two-position five-way valve 1 applies pneumatic pressure to the execution assembly. The execution assembly can be a motion cylinder, a pneumatic valve, a pneumatic motor or a pneumatic spray, etc. to realize the timing control of the execution assembly.

[0021] The second buffer gas cylinder 5 is connected with the pneumatic control end of the second two-position three-way valve 6. When the gas pressure of the second buffer gas cylinder 5 reaches a set value, the gas pressure of the second buffer gas cylinder 5 makes the left and right positions of the second two-position three-way valve 6 functionally switch. The gas inlet P of the second two-position three-way valve 6 is connected with the gas source 4, and the gas outlet A is connected with the pneumatic left control end of the two-position five-way valve 1. When the gas pressure in the second buffer gas cylinder 5 reaches a set value, the gas pressure in the second buffer gas cylinder 5 makes the left position function (the gas inlet R is communicated with the gas outlet A) of the second two-position three-way valve 6 switch to the right position function (the gas inlet P is communicated with the gas outlet A), and the pressure of the gas source 4 acts on the pneumatic left control end of the two-position five-way valve 1 through the gas inlet P and the gas outlet A of the second two-position three-way valve 6, so that the two-position five-way valve 1 switches to the right position function (the gas inlet P is communicated with the gas outlet A). The gas outlet of the second buffer gas cylinder 5 is connected with the gas outlet B of the two-position five-way valve 1 through the second one-way valve 13. The high-pressure gas in the second buffer gas cylinder 5 is released through the gas outlet B and the exhaust port S of the two-position five-way valve 1, and at the same time, the pneumatic pressure on the execution assembly is released. The gas source 4 charges the first buffer gas cylinder 2 through the gas inlet P and the gas outlet A of the two-position five-way valve 1.

[0022] The gas source 4 is also connected with a filter 7 and a pressure gauge 8. The filter 7 filters the gas source 4 to avoid dirty gas entering the pneumatic delay control device 22. The pressure gauge 8 is used to display the pressure of the gas source 4 in real time, so as to ensure that the pneumatic system works in an effective pressure range of the gas source 4.

[0023] The first buffer gas cylinder 2 and the second buffer gas cylinder 5 are both connected with a manual valve 9. The corresponding buffer gas cylinder is periodically released by a manual opening mode to ensure the reliable work of the pneumatic system.

[0024] A first flow meter 10 is arranged between the two-position five-way valve 1 and the first buffer gas cylinder 2. The gas source 4 charges the first buffer gas cylinder 2 through the two-position five-way valve 1 and the first flow meter 10. The first flow meter 10 can control the flow of compressed air entering the first buffer gas cylinder 2. The volume of the first buffer gas cylinder 2 is V1, and the set flow of the first flow meter 10 is Q1, that is, the accurate positioning time is T1=V1÷Q1. The flow meter and the gas buffer bottle are combined to accurately adjust the delay.

[0025] A second flow meter 11 is arranged between the two-position five-way valve 1 and the second buffer gas cylinder 5. The gas source 4 charges the second buffer gas cylinder 5 through the two-position five-way valve 1 and the second flow meter 11. The second flow meter 11 can control the flow of compressed air entering the second buffer gas cylinder 5. The volume of the second buffer gas cylinder 5 is V2, and the set flow of the second flow meter 11 is Q2, that is, the accurate positioning time is T2=V2÷Q2.

[0026] Example 2

[0027] This embodiment is basically the same as embodiment 1 or 2, except that: Figure 1 As shown, a manual reversing valve 16 is also connected between the first buffer gas cylinder 2 and the first two-position three-way valve 3. The left position function of the manual reversing valve 16 is that the air inlet R and the air outlet A are connected, and the right position function is that the air inlet P and the air outlet A are connected. The air inlet R of the left position function of the manual reversing valve 16 is connected to the first buffer gas cylinder 2, the air inlet P of the right position function is connected to the air source 4, and the air outlet A of the manual reversing valve 16 is connected to the pneumatic control terminal of the first two-position three-way valve 3.

[0028] When the air pressure of the first buffer gas cylinder 2 reaches the set value, the first two-position three-way valve 3 is switched to the right-position function (air inlet P and outlet A are connected) through the air inlet R and outlet A of the manual reversing valve 16. The pressure of the air source 4 acts on the pneumatic right control end of the two-position five-way valve 1 through the air inlet P and outlet A of the first two-position three-way valve 3, so that the two-position five-way valve 1 is switched to the left-position function (air inlet P and outlet B are connected, and outlet A and exhaust port R are connected).

[0029] In special circumstances, such as when the air pressure of the first buffer gas cylinder 2 is insufficient to switch the first two-position three-way valve 3 to the right-hand function, the manual reversing valve 16 is manually operated to switch it from the left-hand function to the right-hand function. The air inlet P and the air outlet A are connected, and the air inlet P is connected to the air source 4. The air source 4 acts on the pneumatic control end of the first two-position three-way valve 3 through the air inlet P and the air outlet A of the manual reversing valve 16, so that the first two-position three-way valve 3 is switched to the right-hand function.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pneumatic delay assembly, characterized by: The gas source and a two-position five-way valve are included, the gas inlet P of the two-position five-way valve is connected with the gas source, the gas outlet A is connected with the gas inlet of the first buffer gas cylinder, the gas outlet B is connected with the gas inlet of the second buffer gas cylinder, the first buffer gas cylinder is connected with the pneumatic control end of the first two-position three-way valve, and the gas outlet of the first buffer gas cylinder is connected with the gas outlet A of the two-position five-way valve through the first check valve; The second buffer gas cylinder is connected with the pneumatic control end of the second two-position three-way valve, and the gas outlet of the second buffer gas cylinder is connected with the gas outlet B of the two-position five-way valve through the second check valve; the gas inlet P of the second two-position three-way valve is connected with the gas source, and the gas outlet A is connected with the pneumatic left control end of the two-position five-way valve.

2. A pneumatic delay assembly according to claim 1, wherein: The first buffer gas cylinder and the first two-position three-way valve are further provided with a manual reversing valve, the gas inlet R of the left function of the manual reversing valve is connected with the first buffer gas cylinder, the gas inlet P of the right function is connected with the gas source, and the gas outlet A of the manual reversing valve is connected with the pneumatic control end of the first two-position three-way valve.

3. A gas operated delay assembly according to claim 1 or 2, characterised in that: The gas outlet A of the two-position five-way valve is provided with a first flow meter between the gas inlet of the first buffer gas cylinder; and the gas outlet B of the two-position five-way valve is provided with a second flow meter between the gas inlet of the second buffer gas cylinder.

4. A pneumatic delay assembly according to claim 1, wherein: A filter and a pressure gauge are further included, and the filter and the pressure gauge are connected with the gas source.

5. A pneumatic delay assembly according to claim 1, wherein: Manual valves are arranged on the first buffer gas cylinder and the second buffer gas cylinder, and are used for releasing the condensed water in the corresponding buffer gas cylinder.

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