CN213930428U - Safety instrument system with multiple gas sources - Google Patents
Safety instrument system with multiple gas sources Download PDFInfo
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- CN213930428U CN213930428U CN202022369471.3U CN202022369471U CN213930428U CN 213930428 U CN213930428 U CN 213930428U CN 202022369471 U CN202022369471 U CN 202022369471U CN 213930428 U CN213930428 U CN 213930428U
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Abstract
The utility model discloses a safety instrument system with multiple air sources, which comprises a first air source, a first air pipe, a second air source, a second air pipe, a second pneumatic valve, a third air pipe and an SIS air pipe; one end of the first air pipe is communicated with the first air source, and one end of the first air pipe is communicated with the SIS air pipe; one end of the second air pipe is communicated with the second air source, the other end of the second air pipe is communicated with the SIS air pipe, and the second pneumatic valve is arranged on the second air pipe; the third air pipe is used for communicating the first air pipe and the second pneumatic valve, the second pneumatic valve is in a state of closing the second air pipe when the air pressure in the first air pipe is larger than or equal to a first preset value, and the second pneumatic valve is in a state of opening the second air pipe when the air pressure in the first air pipe is smaller than the first preset value. This scheme has the advantage that improves safety instrument system job stabilization nature.
Description
Technical Field
The utility model relates to a resin production technical field, specific is a safety instrument system with many air supplies.
Background
A Safety Instrumentation System (SIS), also called Safety interlocking System (Safety interlocking System), is mainly an alarm and interlocking part in a plant control System, performs alarm action or adjustment or shutdown control on a detection result in the control System, and is an important component part in automatic control of a plant enterprise.
In an existing SIS system adopted in the resin material manufacturing industry, a pneumatic valve of the SIS system is usually designed to be in a fault-off mode, namely, when the system is normally ventilated, the pneumatic valve is in an opening state, and when an air source is suddenly cut off and air supply is stopped, the pneumatic valve is switched to be in a fault mode, the valve is closed, and the system gives an alarm. Thus, feeding operation cannot be performed on the production line, which may cause production interruption or abnormal quality of finished products. Therefore, how to prevent the air supply failure of the air source in the SIS system from causing the interruption of the system feeding, and further causing the interruption of production or quality abnormality is a problem to be solved by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the embodiment of the utility model provides a safety instrument system with many air supplies, it is used for solving at least one in the above-mentioned problem.
The embodiment of the application discloses: a safety instrument system with multiple air sources comprises a first air source, a first air pipe, a second air source, a second air pipe, a second pneumatic valve, a third air pipe and an SIS air pipe; one end of the first air pipe is communicated with the first air source, and one end of the first air pipe is communicated with the SIS air pipe; one end of the second air pipe is communicated with the second air source, the other end of the second air pipe is communicated with the SIS air pipe, and the second pneumatic valve is arranged on the second air pipe; the third air pipe is used for communicating the first air pipe and the second pneumatic valve, the second pneumatic valve is in a state of closing the second air pipe when the air pressure in the first air pipe is larger than or equal to a first preset value, and the second pneumatic valve is in a state of opening the second air pipe when the air pressure in the first air pipe is smaller than the first preset value.
Specifically, a first check valve is further arranged on the first air pipe and located below the joint of the first air pipe and the third air pipe.
Specifically, still be equipped with first hand valve on the first trachea, first hand valve is located first check valve is kept away from the one end of SIS trachea, and is located first trachea with the junction below of third trachea.
Specifically, a second one-way valve is further arranged on the second air pipe and located at one end, close to the SIS air pipe, of the second pneumatic valve.
Specifically, the second pneumatic valve is a pneumatic ball valve.
Specifically, a second hand valve is further arranged on the second air pipe and is located at one end, far away from the SIS air pipe, of the second pneumatic valve.
Specifically, the safety instrument system with many air supplies still includes fourth trachea, third hand valve and third check valve, the tracheal one end of fourth with the second trachea intercommunication, the tracheal other end of fourth with SIS trachea intercommunication, the fourth trachea with second trachea intercommunication position is in the second pneumatic valve is kept away from the tracheal one end of SIS, the third hand valve sets up on the fourth trachea, the third check valve sets up on the fourth trachea and be located the third hand valve is close to the tracheal one end of SIS.
Specifically, a fourth hand valve located between the third hand valve and the third one-way valve is further arranged on the fourth air pipe.
Specifically, the safety instrument system with multiple air sources further comprises a fifth air pipe communicated with the fourth air pipe and a fifth hand valve arranged on the fifth air pipe, and the communication position of the fifth air pipe and the fourth air pipe is located between the third hand valve and the fourth hand valve.
Specifically, the first air source is air, and the second air source is nitrogen.
The utility model discloses following beneficial effect has at least:
the safety instrument system with multiple air sources of this embodiment sets up the second trachea with the second air source intercommunication through connecting in parallel by first trachea with first air source intercommunication to adopt the third trachea with first trachea intercommunication and the second pneumatic valve with the third trachea intercommunication to control the switching of second trachea, under normal operating condition, provide sufficient gas in order to ensure that the SIS pneumatic valve is in the state of normal work by first trachea to the SIS trachea, when the atmospheric pressure in first trachea appears unusually, the second pneumatic valve is opened so that the second trachea is in the open mode, so, the gas in the second air source can be got into in the SIS trachea by the second trachea in order to maintain the SIS pneumatic valve in normal operating condition. By adopting the scheme, the safety instrument system with the multiple air sources can ensure that the SIS air pipe can be normally supplied with air, reduce the abnormal probability of air supply of the SIS air pipe and reduce the probability of production interruption or abnormal quality of finished products.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a simple structure of a safety instrument system with multiple air sources according to an embodiment of the present invention.
Reference numerals of the above figures: 1. a first air pipe; 11. a first check valve; 12. a first hand valve; 2. a second air pipe; 21. a second one-way valve; 22. a second hand valve; 3. a second pneumatic valve; 4. a third air pipe; 5. SIS trachea; 6. a fourth gas pipe; 61. a third hand valve; 62. a third check valve; 63. a fourth hand valve; 7. a fifth gas pipe; 71. and a fifth hand valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the safety instrument system with multiple air sources of the present embodiment includes a first air source, a second air source, a first air tube 1, a second air tube 2, a second pneumatic valve 3, a third air tube 4, and an SIS air tube 5. Wherein, one end of the first air pipe 1 is communicated with a first air source, and the other end of the first air pipe 1 is communicated with the SIS air pipe 5; one end of the second air pipe 2 is communicated with a second air source, the other end of the second air pipe 2 is communicated with the SIS air pipe 5, and the second pneumatic valve 3 is arranged on the second air pipe 2; the SIS air pipe 5 is provided with an SIS pneumatic valve (not shown), the air flowing into the SIS air pipe 5 from the first air pipe 1 and the second air pipe 2 passes through the SIS pneumatic valve, the SIS pneumatic valve is in a fault closing state, when the SIS air pipe 5 has air (or the air pressure reaches a preset value), the SIS pneumatic valve is in an opening state, and when the SIS air pipe 5 has no air (or the air pressure is less than a preset value), the SIS pneumatic valve is in a closing state.
The third gas pipe 4 is used for communicating the first gas pipe 1 and the second gas valve 3, and the second gas valve 3 has two states of opening the second gas pipe 2 (making the gas in the second gas source enter the SIS gas pipe 5 through the second gas pipe 2) and closing the second gas pipe 2 (preventing the gas in the second gas source from entering the SIS gas pipe 5 through the second gas pipe 2). When the air pressure in the first air pipe 1 is greater than or equal to the first preset value, the second air valve 3 is in a state of closing the second air pipe 2, and when the air pressure in the first air pipe 1 is smaller than the first preset value, the second air valve 3 is in a state of opening the second air pipe 2. That is, because the third air pipe 4 is communicated with the first air pipe 1, when enough air is in the first air pipe 1 and the internal air pressure reaches a first preset value, the second air valve 3 closes the second air pipe 2 under the action of the internal air pressure of the first air pipe 1, and the system can be ensured to be in a normal working state only by providing air into the SIS air pipe 5 through the first air pipe 1; when the gas in the first air pipe 1 is insufficient and the gas pressure in the first air pipe 1 is smaller than a first preset value, the gas pressure in the first air pipe 1 cannot provide enough pressure for the second pneumatic valve 3, therefore, the second pneumatic valve 3 is opened, the gas in the second gas source enters the SIS air pipe 5 through the second air pipe 2 so that the sufficient gas pressure can be maintained in the SIS air pipe 5, and the SIS pneumatic valve is prevented from reaching a fault-off state.
By means of the structure, the safety instrument system with multiple air sources of the embodiment is provided with the second air pipe 2 communicated with the second air source in parallel beside the first air pipe 1 communicated with the first air source, and the third air pipe 4 communicated with the first air pipe 1 and the second pneumatic valve 3 communicated with the third air pipe 4 are adopted to control the opening and closing of the second air pipe 2, in a normal working state, enough air is provided for the SIS air pipe 5 through the first air pipe 1 to ensure that the SIS pneumatic valve is in a normal working state, when the air pressure in the first air pipe 1 is abnormal, the second pneumatic valve 3 is opened to enable the second air pipe 2 to be in an opening state, and therefore the air in the second air source can enter the SIS air pipe 5 through the second air pipe 2 to maintain the SIS pneumatic valve in a normal working state. By adopting the scheme, the safety instrument system with multiple air sources can ensure that the SIS air pipe 5 can be normally supplied with air, reduce the abnormal air supply probability of the SIS air pipe 5 and reduce the abnormal probability of production interruption or finished product quality.
Specifically, as shown in fig. 1, the first air tube 1 of this embodiment may further include a first check valve 11, and the first check valve 11 is located below a connection portion between the first air tube 1 and the third air tube 4. When the gas supply in the first gas pipe 1 is abnormal and the second gas pipe 2 supplies gas to the SIS gas pipe 5, the first check valve 11 can prevent the gas in the SIS gas pipe 5 from flowing back to the first gas source through the first gas pipe 1. Furthermore, first valve 12 may be further disposed on first air tube 1, and first valve 12 is located at an end of first check valve 11 away from SIS air tube 5, and is located below a connection between first air tube 1 and third air tube 4. When the system needs to be serviced, the first gas line 1 can be closed by the first hand valve 12 so that the SIS gas line 5 is not in communication with the first gas source.
Specifically, as shown in fig. 1, the second air pipe 2 of the present embodiment may further include a second check valve 21, and the second check valve 21 may be disposed at an end of the second air-operated valve 3 close to the SIS air pipe 5. When the gas supply in the first gas pipe 1 is normal and the second gas pipe 2 is not needed to supply gas to the SIS gas pipe 5, the second check valve 21 can prevent the gas in the SIS gas pipe 5 from flowing back to the second gas source through the second gas pipe 2. Further, a second hand valve 22 can be further disposed on the second air pipe 2, and the second hand valve 22 is located at one end of the second air-operated valve 3 far away from the SIS air pipe 5. When the system needs to be serviced, second gas line 2 can be closed with second hand valve 22 so that SIS gas line 5 is not in communication with the second gas supply.
Specifically, the second air-operated valve 3 of the present embodiment may be an air-operated ball valve including an air cylinder and a ball valve (both not shown). The cylinder is communicated with the third air pipe 4, when the air pressure in the first air pipe 1 is normal, the third air pipe 4 has enough air pressure, and the cylinder pushes the ball valve to the position for closing the second air pipe 2 under the action of the air pressure; when atmospheric pressure in first trachea 1 was less than first default, the cylinder of pneumatic ball valve replied to initial position, and the ball valve reverted to initial condition, and the valve is opened, and gas in the second air supply can get into SIS trachea 5 through second trachea 2 in, and then can ensure that the SIS pneumatic valve can normal operating. Preferably, the air outlet of the air cylinder may further be provided with a quick automatic air discharging device (not shown), once the air pressure in the first air pipe 1 suddenly drops, the air cylinder may quickly discharge the air temporarily stored in the air cylinder through the quick automatic air discharging device, so as to realize quick opening of the second pneumatic valve 3, and ensure that the air pressure in the SIS air pipe 5 cannot cause insufficient internal air pressure or air supply stoppage due to state switching of the second pneumatic valve 3.
Specifically, as shown in fig. 1, the safety instrument system with multiple air sources of the present embodiment may further include a fourth air tube 6, a third hand valve 61, and a third check valve 62. One end of the fourth air pipe 6 is communicated with the second air pipe 2, and the other end of the fourth air pipe 6 is communicated with the SIS air pipe 5. The place where the fourth air pipe 6 communicates with the second air pipe 2 is located at one end of the second air valve 3 far away from the SIS air pipe 5, the third hand valve 61 is arranged on the fourth air pipe 6, and the third one-way valve 62 is also arranged on the fourth air pipe 6 and located at one end of the third hand valve 61 close to the SIS air pipe 5. Adopt above-mentioned scheme, under the normality, third hand valve 61 is in normally closed state, it is unusual to supply gas in first trachea 1, and second pneumatic valve 3 appears unusually and can't make second trachea 2 be in when opening the state, can be through the mode of manual third hand valve 61 of opening, make in the gas in the second air supply gets into SIS trachea 5 through fourth trachea 6, ensure that SIS pneumatic valve can be in normal operating condition, avoid leading to the system to be in the stop state because gas interruption in SIS trachea 5, the reliability of system has further been improved.
Specifically, referring to fig. 1, a fourth hand valve 63 may be further disposed on the fourth air tube 6 between the third hand valve 61 and the third check valve 62. Further, the safety instrument system with multiple air sources may further include a fifth air tube 7 communicated with the fourth air tube 6, and a fifth hand valve 71 disposed on the fifth air tube 7, wherein the communication between the fifth air tube 7 and the fourth air tube 6 is located between the third hand valve 61 and the fourth hand valve 63. Fifth hand valve 71 is normally closed and fourth hand valve 63 may also be normally closed. Because under normal conditions, the system supplies gas into the SIS gas pipe 5 through the first gas source and the first gas pipe 1, and the second gas source and the second gas pipe 2 only play an auxiliary role when the first gas source is abnormal, theoretically, the use frequency of the second gas pipe 2 and the fourth gas pipe 6 is far lower than that of the first gas pipe 1, when the second gas pipe 2 or the fourth gas pipe 6 is opened and closed, some gas can be remained in the second gas pipe 2 or the fourth gas pipe 6, and in a long-term closed state, in order to improve the safety of the second gas pipe 2 and the fourth gas pipe 6, the residual gas in the second gas pipe 2 and the fourth gas pipe 6 can be discharged through the fifth gas pipe 7.
Specifically, the first gas source may be air in the environment of the work site, which is relatively inexpensive, and the second gas source may be nitrogen. First trachea 1, second trachea 2, fourth trachea 6 and fifth trachea 7 can be the great nonrust steel pipe of intensity, and third trachea 4 can be the hose, and so, third trachea 4 can be buckled at will when the installation, is favorable to the convenience of installation.
The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (10)
1. A safety instrument system with multiple air sources is characterized by comprising a first air source, a first air pipe, a second air source, a second air pipe, a second pneumatic valve, a third air pipe and an SIS air pipe; one end of the first air pipe is communicated with the first air source, and one end of the first air pipe is communicated with the SIS air pipe; one end of the second air pipe is communicated with the second air source, the other end of the second air pipe is communicated with the SIS air pipe, and the second pneumatic valve is arranged on the second air pipe; the third air pipe is used for communicating the first air pipe and the second pneumatic valve, the second pneumatic valve is in a state of closing the second air pipe when the air pressure in the first air pipe is larger than or equal to a first preset value, and the second pneumatic valve is in a state of opening the second air pipe when the air pressure in the first air pipe is smaller than the first preset value.
2. The safety instrumented system with a plurality of gas sources of claim 1, wherein the first gas tube further comprises a first one-way valve, the first one-way valve being located below a junction of the first gas tube and the third gas tube.
3. The safety instrumented system with a plurality of air sources of claim 2, wherein the first air tube further comprises a first hand valve, the first hand valve is located at an end of the first one-way valve away from the SIS air tube and below a junction of the first air tube and the third air tube.
4. The safety instrumented system with a multiple air supply of claim 1, wherein the second air tube further has a second one-way valve located at an end of the second pneumatic valve near the SIS air tube.
5. The safety instrumented system with multiple gas sources of claim 1, wherein the second pneumatic valve is a pneumatic ball valve.
6. The safety instrumented system with a multiple gas supply of claim 1, wherein a second hand valve is further provided on the second gas tube, the second hand valve being located at an end of the second pneumatic valve remote from the SIS gas tube.
7. The safety instrumented system with a multi-air supply of claim 1, further comprising a fourth air tube, one end of the fourth air tube communicating with the second air tube, the other end of the fourth air tube communicating with the SIS air tube, the fourth air tube communicating with the second air tube at an end of the second pneumatic valve remote from the SIS air tube, a third hand valve disposed on the fourth air tube, and a third one-way valve disposed on the fourth air tube at an end of the third hand valve close to the SIS air tube.
8. The safety instrumented system with a plurality of gas sources of claim 7, wherein a fourth hand valve is further provided on the fourth gas tube between the third hand valve and the third one-way valve.
9. The safety instrumented system with a multiple gas supply of claim 8, further comprising a fifth gas tube in communication with the fourth gas tube, a fifth hand valve disposed on the fifth gas tube, the fifth gas tube in communication with the fourth gas tube between the third hand valve and the fourth hand valve.
10. The safety instrumented system with multiple gas sources of claim 1, wherein the first gas source is air and the second gas source is nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022369471.3U CN213930428U (en) | 2020-10-22 | 2020-10-22 | Safety instrument system with multiple gas sources |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022369471.3U CN213930428U (en) | 2020-10-22 | 2020-10-22 | Safety instrument system with multiple gas sources |
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| CN213930428U true CN213930428U (en) | 2021-08-10 |
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| CN202022369471.3U Active CN213930428U (en) | 2020-10-22 | 2020-10-22 | Safety instrument system with multiple gas sources |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046448A (en) * | 2021-10-21 | 2022-02-15 | 中国建材国际工程集团有限公司 | Gas pipeline gas supply system |
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2020
- 2020-10-22 CN CN202022369471.3U patent/CN213930428U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046448A (en) * | 2021-10-21 | 2022-02-15 | 中国建材国际工程集团有限公司 | Gas pipeline gas supply system |
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