CN211231798U - Pneumatic type initiative flame proof push-pull valve - Google Patents
Pneumatic type initiative flame proof push-pull valve Download PDFInfo
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- CN211231798U CN211231798U CN201922235182.1U CN201922235182U CN211231798U CN 211231798 U CN211231798 U CN 211231798U CN 201922235182 U CN201922235182 U CN 201922235182U CN 211231798 U CN211231798 U CN 211231798U
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Abstract
The utility model relates to a pneumatic type initiative flame proof gate valve, which comprises a valve body, a movable gate, a gas supply device, a cylinder, a controller and a differential pressure sensor, wherein the valve body comprises an upstream flange, a downstream flange and a valve cavity, a groove is arranged in the valve cavity, and the movable gate slides up and down in the groove; the differential pressure sensor is arranged on the dust removal air pipes on the two sides of the valve body; the cylinder is arranged at the top of the valve body, is divided into an upper air chamber cavity and a lower air chamber cavity by the piston, and is communicated with the air supply device, and the movable inserting plate is welded on the inserting plate connecting rod; an upper air chamber air outlet valve and a lower air chamber air outlet valve are respectively welded on the upper air chamber cavity and the lower air chamber cavity; the controller is electrically connected with the differential pressure sensor, the electromagnetic valve and the air supply device. The utility model discloses a differential pressure sensor monitoring valve body both sides pressure differential changes, and the picture peg can effectively be closed in the initiative in the explosion of its arbitrary one side, and the separation explosion does not stretch to the other end, neither influences the technology air current, can realize initiative two-way flame proof again.
Description
Technical Field
The utility model belongs to the technical field of dust explosion flame proof device, especially, relate to a pneumatic type initiative flame proof push-pull valve.
Background
In recent years, dust explosion accidents of powder enterprises are frequently seen, and prevention of dust explosion and reduction of dust explosion hazards have become the leading measures of governments, emergency management departments and various powder enterprises in various regions. At present, in order to reduce the influence of dust explosion, a common means is to isolate the explosion, a flap explosion-proof valve is adopted at present, but the flap explosion-proof valve can only isolate the explosion generated at one side, and the floating ball type bidirectional explosion-proof valve can seriously influence the process airflow.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art existence, the utility model provides a pneumatic type initiative flame proof push-pull valve through the change of pressure difference sensor monitoring portable push-pull valve both sides pressure differential, and the picture peg can both initiatively effectively be closed in explosion emergence of its arbitrary one side, and the separation explosion does not stretch to the other end, neither influences the process air current, can realize initiative two-way flame proof, action rapid stabilization again.
A pneumatic active explosion-proof gate valve comprises a valve body, a movable gate, a gas supply device, a cylinder, a controller and a differential pressure sensor, wherein the valve body comprises an upstream flange, a downstream flange and a valve cavity, the valve cavity comprises an upper part and a lower part, the lower part of the valve cavity is connected between the upstream flange and the downstream flange, a groove is formed in the valve cavity, and the movable gate slides up and down in the groove; the differential pressure sensor is arranged on the dust removal air pipes on the two sides of the valve body; the movable plug board is welded on a plug board connecting rod connected to the piston in the lower air chamber cavity of the air cylinder; the air supply device is respectively communicated with an upper air chamber air inlet and a lower air chamber air inlet of the air cylinder through pressure-resistant pipes through electromagnetic valves, and the upper air chamber cavity and the lower air chamber cavity are respectively welded with an upper air chamber air outlet valve and a lower air chamber air outlet valve; the controller is electrically connected with the differential pressure sensor, the electromagnetic valve and the air supply device; the piston moves up and down due to the change of air pressure in the upper air chamber and the lower air chamber, and drives the movable plugboard to slide up and down, so that the switching of the opening and closing states of the plugboard valve is realized.
The distance between the differential pressure sensor and the movable inserting plate is determined according to the actual working condition wind speed and the inserting plate response time, the inserting plate response time under different working conditions is different, the inserting plate response time applied to the dust removing air pipes with different cross sections is also different, and the actual installation distance of the sensor is also different.
The sectional area of the movable inserting plate is larger than that of the dust removing air pipe.
Sealing rubber is distributed on the surface of the groove, so that sealing between the movable valve plate and the dust removal pipeline and sealing between the movable inserting plate and the valve body are realized.
The air supply device is a compressed air bottle, and inert gas is filled in the air supply device.
Go up air chamber air outlet valve and air chamber air outlet valve down and include sleeve pipe, sealing rubber stopper and the bolt of welding dress on the cylinder, sealing rubber stopper interference fit is inside the sleeve pipe, and the sleeve pipe tip is locked with the bolt, guarantees the sealed of air chamber.
The movable inserting plate can be square or round and can be respectively used on pipelines with different shapes.
The utility model has the advantages that: the utility model changes the position of the piston in the cylinder by utilizing the charging and discharging of the upper and lower air chamber cavities, thereby ensuring the normal working state of the gate valve and the action of timely closing when preventing explosion; compared with the prior product, the utility model has the advantages of do: (1) the sensor can detect the explosion condition on any side of the dedusting air pipe, and the purpose of bidirectional explosion suppression can be effectively achieved; (2) the pressure difference is transmitted to the controller through the sensor, and the controller sends an instruction to the electromagnetic valve and the air device so as to close the gate valve, so that the effect of active explosion suppression can be realized; (3) the utility model discloses simple structure, reaction are quick, flame proof stable performance.
Drawings
Fig. 1 is a schematic view of a usage status of the present invention provided by an embodiment;
FIG. 2 is a schematic view of the internal structure of the upper air chamber air outlet valve and the lower air chamber air outlet valve of the present invention;
FIG. 3 is a schematic view of the open state of the middle gate valve of the present invention;
FIG. 4 is a schematic view of the middle gate valve in a half-open state during closing process of the utility model;
FIG. 5 is a schematic view of the closing state of the middle gate valve of the present invention;
wherein the content of the first and second substances,
the device comprises an upper air chamber air inlet, a lower air chamber air inlet, a movable inserting plate, a connecting rod of a 4 inserting plate, a valve body of 5, an upstream flange of 6, a downstream flange of 7, an air cylinder of 8, a groove of 9, a differential pressure sensor of 10, a controller of 11, an air supply device of 12, an upper air chamber air outlet valve of 13, a lower air chamber air outlet valve of 14, a sleeve of 15, a sealing rubber plug of 16 and a bolt of 17.
Detailed Description
For better explanation of the present invention, the following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings for better understanding.
As shown in fig. 1-5, a pneumatic active explosion-proof gate valve comprises a valve body 5, a movable gate 3, a gas supply device 12, a cylinder 8, a controller 11 and a differential pressure sensor 10, wherein the valve body 5 comprises an upstream flange 6, a downstream flange 7 and a valve cavity, the valve cavity comprises an upper part and a lower part which are connected between the upstream flange 6 and the downstream flange 7, a groove 9 is formed in the valve cavity, the movable gate 3 slides up and down in the groove 9, and sealing rubber is distributed on the surface of the groove 9 to realize the sealing of the movable valve plate and a dust removal pipeline and the sealing of the movable gate 3 and the valve body 5; the differential pressure sensor 10 is installed on the dust removal air pipes on two sides of the valve body 5, the distance between the differential pressure sensor 10 and the movable inserting plate 3 is determined according to the actual working condition air speed and the inserting plate response time, the inserting plate response time under different working conditions is different, the actual installation distance of the sensor is also different, the inserting plate response time comprises mechanical delay and electrical delay, the mechanical delay and the electrical delay are measured, connecting indicating lamps are required to be arranged at multiple positions on the dust removal air pipes, the controller 11 sends out an inserting plate closing instruction, and the delay is analyzed and calculated frame by frame through high-speed photography video in the process of sending out the instruction to close the movable inserting plate 3; in the embodiment, the wind speed in the dust removing air duct is 23m/s, the total delay time of the gate valve is 100ms, so the actual distance between the differential pressure sensor 10 and the movable gate valve is at least 23 multiplied by 0.1m, but the installation distance is defined as or 5 times considering the instantaneous speed of explosion propagation, namely the installation distance between the sensor and the gate valve is 11.5 m; during normal operation, the test value of the differential pressure sensor 10 on the two sides is within the threshold range of dust safety without explosion; the cylinder 8 is arranged at the top of the valve body 5 and is divided into an upper air chamber cavity and a lower air chamber cavity by a piston, and the movable inserting plate 3 is welded in the lower air chamber cavity of the cylinder 8 and is connected to an inserting plate connecting rod 4 on the piston; the air supply device 12 is respectively communicated with an upper air chamber air inlet 1 and a lower air chamber air inlet 2 of the air cylinder 8 through electromagnetic valves by pressure-resistant pipes, and the upper air chamber cavity and the lower air chamber cavity are respectively welded with an upper air chamber air outlet valve 13 and a lower air chamber air outlet valve 14; the controller 11 is electrically connected with the differential pressure sensor 10, the electromagnetic valve and the air supply device 12, and the electromagnetic valve is arranged on the outer wall of the air cylinder 8 and covered by a sealing box; the piston moves up and down due to the change of air pressure in the upper air chamber and the lower air chamber, and drives the movable plugboard 3 to slide up and down, so that the switching of the opening and closing states of the plugboard valve is realized.
The sectional area of the movable inserting plate 3 is larger than that of the dust removing air pipe.
The air supply device 12 is a compressed air bottle, and inert gas is filled inside the air supply device.
As shown in fig. 2, the upper air chamber air outlet valve 13 and the lower air chamber air outlet valve 14 include a sleeve 15 welded on the air cylinder 8, a sealing rubber plug 16 and a bolt 17, the sealing rubber plug 16 is in interference fit inside the sleeve 15, and the end of the sleeve 15 is locked by the bolt 17 to ensure the sealing of the air chamber. In the normal working process, if the movable inserting plate is installed for the first time, the movable inserting plate needs to be opened, namely, moved upwards, the bolt 17 on the air outlet valve 13 of the upper air chamber cavity needs to be detached, the lower air chamber cavity is inflated, and the bolt 17 on the air outlet valve 13 of the upper air chamber cavity is installed after the movable inserting plate moves upwards; if the gate valve needs to be manually turned off, the bolt 17 on the air outlet valve 14 of the lower air chamber cavity needs to be detached, and the upper air chamber cavity is inflated, so that the gate valve is opened and closed; when the movable flashboard 3 needs to be closed for explosion suppression, the bolt 17 on the air outlet valve of the upper air chamber and the bolt 17 on the air outlet valve of the lower air chamber are installed, and the bolt 17 and the sealing rubber plug 16 are flushed out of the sleeve 15 for air release when the upper air chamber is flushed with the air piston to gradually move downwards along with the increase of the air pressure of the lower air chamber. The bolts 17 of the upper chamber cavity should be more pressure resistant than the bolts 17 of the lower chamber cavity.
The controller 11 may be an explosion proof box, a PLC, a DSP or an ARM controller.
The removable insert 3 may be square or round and may be used in different shapes of pipes.
As shown in fig. 1, in this embodiment, a pneumatic active explosion-proof gate valve and an explosion-proof method are used in a circular pipeline, and the explosion-proof method of the pneumatic active explosion-proof gate valve is as follows: the differential pressure sensor 10, the electromagnetic valve and the air supply device 12 are connected with the controller 11 and controlled by the controller 11, the differential pressure sensor 10 monitors the pressures at the two ends of the dedusting air pipe in real time, the values detected by the differential pressure sensors 10 at the two ends under normal working conditions are far smaller than the pressure threshold value of explosion, when the differential pressure sensors 10 at any side detect a signal exceeding the pressure threshold value, the controller 11 sends a signal to the electromagnetic valve connected with the air supply device 12 and the upper air chamber, the air supply device 12 inflates the upper air chamber, the air pressure of the two air chamber is changed to enable the piston in the air cylinder 8 to move downwards, the air pressure of the lower air chamber enables the bolt 17 and the sealing rubber plug 16 to be flushed out of the sleeve 15 for deflation, and as shown in fig. 4-5, the piston drives the movable inserting plate.
When the movable inserting plate 3 needs to be opened to the state shown in fig. 3, the bolt 17 of the lower air chamber air outlet valve 14 is locked, the bolt 17 of the upper air chamber air outlet valve 13 is detached, the controller 11 sends an instruction to the electromagnetic valve connected with the lower air chamber and the air supply device 12, the electromagnetic valve is opened to inflate the lower air chamber of the air cylinder 8, the change of the pressure difference of the upper air chamber and the lower air chamber causes the piston to drive the insert plate to move upwards, the air pressure of the upper air chamber drives the sealing rubber plug 16 of the upper air chamber air outlet valve 13 to be flushed out of the sleeve 15 to deflate, and the piston drives the movable valve plate to move upwards to open the inserting plate valve.
Claims (7)
1. A pneumatic type active explosion-proof gate valve is characterized in that: the valve comprises a valve body, a movable inserting plate, an air supply device, an air cylinder, a controller and a differential pressure sensor, wherein the valve body comprises an upstream flange, a downstream flange and a valve cavity, the valve cavity comprises an upper part and a lower part, the lower part of the valve cavity is connected between the upstream flange and the downstream flange, a groove is formed in the valve cavity, and the movable inserting plate slides up and down in the groove; the differential pressure sensor is arranged on the dust removal air pipes on the two sides of the valve body; the movable plug board is welded on a plug board connecting rod connected to the piston in the lower air chamber cavity of the air cylinder; the air supply device is respectively communicated with an upper air chamber air inlet and a lower air chamber air inlet of the air cylinder through pressure-resistant pipes through electromagnetic valves, and the upper air chamber cavity and the lower air chamber cavity are respectively welded with an upper air chamber air outlet valve and a lower air chamber air outlet valve; the controller is electrically connected with the differential pressure sensor, the electromagnetic valve and the air supply device; the piston moves up and down due to the change of air pressure in the upper air chamber and the lower air chamber, and drives the movable plugboard to slide up and down, so that the switching of the opening and closing states of the plugboard valve is realized.
2. The pneumatic type active explosion-proof gate valve according to claim 1, characterized in that: the distance between the differential pressure sensor and the movable inserting plate is determined according to the actual working condition wind speed and the inserting plate response time, the inserting plate response time under different working conditions is different, the inserting plate response time applied to the dust removing air pipes with different cross sections is also different, and the actual installation distance of the sensor is also different.
3. The pneumatic type active explosion-proof gate valve according to claim 1, characterized in that: the sectional area of the movable inserting plate is larger than that of the dust removing air pipe.
4. The pneumatic type active explosion-proof gate valve according to claim 1, characterized in that: sealing rubber is distributed on the surface of the groove, so that sealing between the movable valve plate and the dust removal pipeline and sealing between the movable inserting plate and the valve body are realized.
5. The pneumatic type active explosion-proof gate valve according to claim 1, characterized in that: the air supply device is a compressed air bottle, and inert gas is filled in the air supply device.
6. The pneumatic type active explosion-proof gate valve according to claim 1, characterized in that: go up air chamber air outlet valve and air chamber air outlet valve down and include sleeve pipe, sealing rubber stopper and the bolt of welding dress on the cylinder, sealing rubber stopper interference fit is inside the sleeve pipe, and the sleeve pipe tip is locked with the bolt, guarantees the sealed of air chamber.
7. The pneumatic type active explosion-proof gate valve according to claim 1, characterized in that: the movable inserting plate can be square or round and can be respectively used on pipelines with different shapes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922235182.1U CN211231798U (en) | 2019-12-13 | 2019-12-13 | Pneumatic type initiative flame proof push-pull valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922235182.1U CN211231798U (en) | 2019-12-13 | 2019-12-13 | Pneumatic type initiative flame proof push-pull valve |
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| Publication Number | Publication Date |
|---|---|
| CN211231798U true CN211231798U (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922235182.1U Active CN211231798U (en) | 2019-12-13 | 2019-12-13 | Pneumatic type initiative flame proof push-pull valve |
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| CN (1) | CN211231798U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848447A (en) * | 2019-12-13 | 2020-02-28 | 汇乐因斯福环保安全研究院（苏州）有限公司 | Pneumatic type active explosion-proof gate valve and explosion-proof method |
| CN113339329A (en) * | 2021-06-16 | 2021-09-03 | 刘军 | Self-cleaning maintenance intelligent pump and use method thereof |
-
2019
- 2019-12-13 CN CN201922235182.1U patent/CN211231798U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848447A (en) * | 2019-12-13 | 2020-02-28 | 汇乐因斯福环保安全研究院（苏州）有限公司 | Pneumatic type active explosion-proof gate valve and explosion-proof method |
| CN110848447B (en) * | 2019-12-13 | 2023-11-24 | 汇乐因斯福环保安全研究院（苏州）有限公司 | Pneumatic active explosion-proof gate valve and explosion-proof method |
| CN113339329A (en) * | 2021-06-16 | 2021-09-03 | 刘军 | Self-cleaning maintenance intelligent pump and use method thereof |
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