Flow type electromagnetic valve group for emergency shutdown

Abstract

The utility model relates to the technical field of oil refinery range hood inlet butterfly valve ESD hydraulic control, in particular to a flow type electromagnetic valve set for emergency shutdown, which comprises a control oil port, an oil return port, a pressure detection port, an electromagnetic valve I, an electromagnetic valve II and an electromagnetic valve III, one side of the control oil port is fixedly connected with a control oil pipe, one side of the oil return port is fixedly connected with an oil return pipe, and the other side of the oil return port is fixedly connected with a pressure detection port. According to the electromagnetic valve set, the control oil port, the oil return port, the pressure detection port, the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are used in cooperation, so that when the electromagnetic valve set is used, usability and reliability of ESD are improved, and misoperation cannot occur due to the maximum action effectiveness.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of ESD hydraulic control of a butterfly valve at an inlet of a smoke exhaust fan in an oil refinery, in particular to a flow type electromagnetic valve group for emergency shutdown. Background Art

[0002] In the ESD system, dual solenoid valves are often used to construct a "two-choice-one" or "two-choice-two" voting logic module. In practical applications, the "two-choice-one" voting focuses on the realization of safety, but the availability is slightly insufficient and it is prone to false operation; the "two-choice-two" voting focuses on availability. Once one of the solenoid valves fails, it may cause the overall safety function to fail. In the prior art, the components used to implement the "two-choice-one", "two-choice-two" and "three-choice-two" voting are mostly relatively complex components, and the manufacturing process is relatively complex. Alternatively, the prior art uses a solenoid valve as a pilot to control multiple hydraulic control valves. This solution uses more components. The hydraulic control valve is generally a sliding valve function, which has a higher risk of jamming and lower reliability. Therefore, we provide a flow-type solenoid valve group for emergency shutdown to solve the defects of the prior art. Utility Model Content

[0003] The utility model mainly provides a flow type electromagnetic valve group for emergency shutdown, which is used to solve the technical problems raised in the above background technology.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] A flow type solenoid valve group for emergency shutdown includes a control oil port, an oil return port, a pressure detection port, a solenoid valve 1, a solenoid valve 2 and a solenoid valve 3, wherein one side of the control oil port is fixedly connected to a control oil pipe, one side of the oil return port is fixedly connected to an oil return pipe, and one side of the pressure detection port is fixedly connected to a pressure detection main line.

[0006] Furthermore, the control oil pipe is connected to solenoid valve one, solenoid valve two and solenoid valve three respectively through the oil inlet pipe, the return oil pipe is connected to solenoid valve one, solenoid valve two and solenoid valve three respectively through the return oil connecting pipe, and the pressure detection main line is connected to solenoid valve one, solenoid valve two and solenoid valve three respectively through the pressure detection connecting line.

[0007] Furthermore, the output end of the control oil pipe is fixedly connected to the input end of the oil inlet pipe, and the output end of the oil inlet pipe is fixedly connected to the input ends of solenoid valve 1, solenoid valve 2 and solenoid valve 3 respectively, and a throttle 1 is provided on the outer fixed sleeve at the connection between the control oil port and the control oil pipe, and the diameter of the throttle 1 is Φ2.

[0008] Furthermore, the input end of the oil return connecting pipe is fixedly connected to the output ends of the solenoid valve 1, the solenoid valve 2 and the solenoid valve 3 respectively, and the output end of the oil return connecting pipe is fixedly connected to the input end of the oil return pipe.

[0009] Furthermore, a throttle 2 is provided on the fixed sleeve outside the oil return connecting pipe, and the diameter of the throttle 2 is Φ1.5.

[0010] Furthermore, the input end of the pressure detection connection line is fixedly connected to the output ends of the solenoid valve 1, the solenoid valve 2 and the solenoid valve 3 respectively, and the output end of the pressure detection connection line is fixedly connected to the input end of the pressure detection main line.

[0011] Furthermore, the solenoid valve 1, the solenoid valve 2 and the solenoid valve 3 are all identical two-position three-way leakage-free solenoid valves.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model cooperates with the control oil port, the oil return port, the pressure detection port, the solenoid valve 1, the solenoid valve 2 and the solenoid valve 3 in use. The throttle 1 and the throttle 2 have the function of controlling the hydraulic flow. In the normal working state, the solenoid valve 1, the solenoid valve 2 and the solenoid valve 3 are in the energized state. During ESD, any solenoid valve loses power, the pressure detection port is connected to the oil return port, the pressure is, and the ESD is put into use. If only any one of the solenoid valves loses power, because the throttle 1 and the throttle 2, the hydraulic oil entering the pressure detection port through the solenoid valve is more than the hydraulic oil flowing out of the de-energized solenoid valve. Therefore, the pressure of the pressure detection port is maintained at a high pressure, and the ESD will not be mistakenly put into use. When the solenoid valve group is used, the availability and reliability of the ESD are improved, and the maximum action effectiveness cannot be malfunctioned.

[0014] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the hydraulic control connection of the ESD butterfly valve at the inlet of the oil refinery smoke exhaust fan of the utility model.

[0016] In the figure: 1. Control oil port; 2. Throttle one; 3. Control oil pipe; 4. Oil inlet pipe; 5. Oil return port; 6. Oil return pipe; 7. Oil return connecting pipe; 8. Throttle two; 9. Solenoid valve one; 10. Solenoid valve two; 11. Solenoid valve three; 12. Pressure detection connecting line; 13. Pressure detection main line; 14. Pressure detection port. DETAILED DESCRIPTION

[0017] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0018] For examples, please refer to the attached Figure 1 As shown, a flow type solenoid valve group for emergency shutdown includes a control oil port 1, an oil return port 5, a pressure detection port 14, a solenoid valve 1 9, a solenoid valve 2 10 and a solenoid valve 3 11. One side of the control oil port 1 is fixedly connected to a control oil pipe 3, one side of the return oil port 5 is fixedly connected to an oil return pipe 6, and one side of the pressure detection port 14 is fixedly connected to a pressure detection main line 13.

[0019] Among them, the control oil pipe 3 is connected to the solenoid valve 1 9, the solenoid valve 2 10 and the solenoid valve 3 11 respectively through the oil inlet pipe 4, the return oil pipe 6 is connected to the solenoid valve 1 9, the solenoid valve 2 10 and the solenoid valve 3 11 respectively through the return oil connecting pipe 7, and the pressure detection main line 13 is connected to the solenoid valve 1 9, the solenoid valve 2 10 and the solenoid valve 3 11 respectively through the pressure detection connecting line 12. In normal working state, the solenoid valve 1 9, the solenoid valve 2 10 and the solenoid valve 3 11 are in the energized state, and during ESD, any two solenoid valves lose power, the pressure detection port 14 is connected to the return oil port 5, the pressure is 0, and ESD is put into use. If only any one of the solenoid valves loses power, because the throttle 1 2 and the throttle 2 8, the hydraulic oil entering the pressure detection port 14 through the solenoid valve is more than the hydraulic oil flowing out of the de-energized solenoid valve. Therefore, the pressure of the pressure detection port 14 is maintained at a high pressure, and no erroneous ESD will occur, thereby improving the availability and reliability of the ESD, and the maximum action effectiveness cannot be erroneous.

[0020] Among them, the output end of the control oil pipe 3 is fixedly connected to the input end of the oil inlet pipe 4, and the output end of the oil inlet pipe 4 is fixedly connected to the input ends of the solenoid valve 1 9, the solenoid valve 2 10 and the solenoid valve 3 11 respectively, and a throttle 2 is provided on the outer fixed sleeve at the connection between the control oil port 1 and the control oil pipe 3. The diameter of the throttle 2 is Φ2, and the throttle 2 has the function of controlling the hydraulic flow.

[0021] Among them, the input end of the return oil connecting pipe 7 is fixedly connected to the output ends of the solenoid valve 1 9, the solenoid valve 2 10 and the solenoid valve 3 11 respectively, and the output end of the return oil connecting pipe 7 is fixedly connected to the input end of the return oil pipe 6. A throttle 2 8 is fixedly sleeved on the outer side of the return oil connecting pipe 7. The diameter of the throttle 2 8 is Φ1.5, and the throttle 2 8 has the function of controlling the hydraulic flow.

[0022] Among them, the input end of the pressure detection connecting line 12 is fixedly connected to the output ends of solenoid valve 1 9, solenoid valve 2 10 and solenoid valve 3 11 respectively, and the output end of the pressure detection connecting line 12 is fixedly connected to the input end of the pressure detection main line 13, and the de-energization pressure of solenoid valve 1 9, solenoid valve 2 10 and solenoid valve 3 11 is maintained through the pressure detection port 14.

[0023] Among them, the solenoid valve 1 9 , the solenoid valve 2 10 and the solenoid valve 3 11 are all identical two-position three-way non-leakage solenoid valves.

[0024] The above is only an embodiment of the utility model, and does not represent the technical scope of the invention. For the technology in this field, the utility model can have various changes and variations. It can be changed to 4 out of 2, 4 out of 3 or 5 out of 2, 5 out of 3, 5 out of 4, etc. It can also change the electromagnetic valve to be powered for ESD, and it can also change the X port to high voltage for ESD. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the present invention.

Claims

1. A flow type solenoid valve assembly for emergency shutdown, comprising a control oil port (1), an oil return port (5), a pressure detection port (14), a solenoid valve 1 (9), a solenoid valve 2 (10) and a solenoid valve 3 (11), characterized in that: A control oil pipe (3) is fixedly connected to one side of the control oil port (1), an oil return pipe (6) is fixedly connected to one side of the oil return port (5), and a pressure detection main line (13) is fixedly connected to one side of the pressure detection port (14). The control oil pipe (3) is connected to the first solenoid valve (9), the second solenoid valve (10) and the third solenoid valve (11) respectively through an oil inlet pipe (4), the oil return pipe (6) is connected to the first solenoid valve (9), the second solenoid valve (10) and the third solenoid valve (11) respectively through an oil return connecting pipe (7), and the pressure detection main line (13) is connected to the first solenoid valve (9), the second solenoid valve (10) and the third solenoid valve (11) respectively through a pressure detection connecting line (12).

2. The flow type solenoid valve group for emergency shutdown according to claim 1, characterized in that: The output end of the control oil pipe (3) is fixedly connected to the input end of the oil inlet pipe (4), and the output end of the oil inlet pipe (4) is fixedly connected to the input ends of the solenoid valve 1 (9), the solenoid valve 2 (10) and the solenoid valve 3 (11), respectively. A throttle 1 (2) is provided on the outer fixed sleeve at the connection between the control oil port (1) and the control oil pipe (3), and the diameter of the throttle 1 (2) is Φ2.

3. The flow type solenoid valve group for emergency shutdown according to claim 1, characterized in that: The input end of the oil return connecting pipe (7) is fixedly connected to the output ends of the solenoid valve 1 (9), the solenoid valve 2 (10) and the solenoid valve 3 (11), respectively, and the output end of the oil return connecting pipe (7) is fixedly connected to the input end of the oil return pipe (6).

4. The flow type solenoid valve group for emergency shutdown according to claim 3 is characterized in that: A throttle valve 2 (8) is fixedly sleeved outside the oil return connecting pipe (7), and the diameter of the throttle valve 2 (8) is Φ1.

5.

5. The flow type solenoid valve assembly for emergency shutdown according to claim 1, characterized in that: The input end of the pressure detection connection line (12) is fixedly connected to the output ends of the solenoid valve 1 (9), the solenoid valve 2 (10) and the solenoid valve 3 (11), respectively, and the output end of the pressure detection connection line (12) is fixedly connected to the input end of the pressure detection main line (13).

6. The flow type solenoid valve assembly for emergency shutdown according to claim 1, characterized in that: The solenoid valve 1 (9), the solenoid valve 2 (10) and the solenoid valve 3 (11) are all identical two-position three-way non-leakage solenoid valves.

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