Constant-voltage double-film control cabinet

Abstract

The utility model relates to the technical field of constant-pressure double-film control cabinets, and discloses a constant-pressure double-film control cabinet, which comprises a control cabinet main body, a control mechanism and a constant-pressure mechanism, the control cabinet main body comprises an external frame, the constant-pressure mechanism comprises a fan, the output end of the fan is fixedly connected with a connecting hose, and the output end of the fan is fixedly connected with the connecting hose. An inflation bin is fixedly connected to the inner wall of the side face of the outer frame, a first diaphragm is fixedly connected to the inner wall of the side face of the inflation bin, a pressure relief pipe is fixedly connected to the side face of the inflation bin, and a second diaphragm is fixedly connected to the inner wall of the side face of the pressure relief pipe; a sliding block is movably connected to the inner wall of the side face of the mounting cylinder, a connecting rod is fixedly connected to the side face of the sliding block, a first control switch is fixedly connected to the top end of the mounting cylinder, and a second control switch is fixedly connected to the top end of the mounting cylinder; the utility model provides the constant-voltage double-film control cabinet which reduces the use of electronic components and is convenient for manual operation.

Description

Technical Field

[0001] This utility model relates to the technical field of constant pressure dual-membrane control cabinets, and more specifically to a constant pressure dual-membrane control cabinet. Background Technology

[0002] A double-membrane gas holder is a device used to store neutral gases such as biogas. It is widely used for storing various neutral gases such as biogas, air, carbon dioxide, and oxygen. The double-membrane biogas storage tank mainly consists of a bottom membrane (integrated gas holders do not have a bottom membrane), an inner membrane, an outer membrane, a constant pressure control cabinet, safety protectors, and some control equipment and auxiliary materials. The constant pressure control cabinet is mainly used to maintain the gas pressure balance of the gas stored in the inner membrane of the double-membrane gas holder. During use, the pressure inside the inner membrane is monitored in real time by detection equipment. Based on the monitoring data, gas is injected into or discharged into the outer membrane, causing the inner membrane to contract or expand, thereby ensuring that the internal pressure of the inner membrane is maintained within a suitable range and ensuring gas storage safety.

[0003] Current technology is inadequate: existing constant pressure control cabinets typically use multiple electronic monitoring probes to detect changes in the internal pressure of the double-membrane gas holder in real time, and use a PLC controller to control the operation of the fan to pressurize or depressurize the outer membrane; however, in actual use, when electronic components malfunction, they cannot be handled in time and cannot be switched to manual operation to balance the air pressure, which affects the safety of the equipment. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a constant pressure dual-membrane control cabinet to solve the problems existing in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a constant pressure dual-membrane control cabinet, comprising a control cabinet body, and further comprising: a control mechanism and a constant pressure mechanism. The bottom inner wall of the control cabinet body is fixedly connected to the bottom of the constant pressure mechanism, and the side of the control mechanism is fixedly connected to the side of the constant pressure mechanism. The control cabinet body includes an outer frame, and electrical components are fixedly connected to the bottom inner wall of the outer frame. A control panel is fixedly connected to the side of the outer frame. The constant pressure mechanism includes a fan, the bottom of which is fixedly connected to the bottom inner wall of the outer frame. An air chamber is fixedly connected to the side inner wall of the outer frame. A connecting hose is fixedly connected to the output end of the fan. The top end of the device is fixedly connected to the bottom end of the inflation chamber. A first diaphragm is fixedly connected to the inner side wall of the inflation chamber. The top end of the inflation chamber has an upper cavity. A pressure relief pipe is fixedly connected to the side of the inflation chamber. A second diaphragm is fixedly connected to the inner side wall of the pressure relief pipe. The control mechanism includes an installation cylinder. A slider is movably connected to the inner side wall of the installation cylinder. A connecting rod is fixedly connected to the side of the slider. The side of the connecting rod is fixedly connected to the side of the second diaphragm. The side of the installation cylinder is fixedly connected to the side of the pressure relief pipe. A first control switch is fixedly connected to the top end of the installation cylinder. A second control switch is fixedly connected to the top end of the installation cylinder. A side plate is movably connected to the side of the outer frame via a pin.

[0006] Furthermore, a marking rod is fixedly connected to the side of the slider, and the side of the marking rod is provided with scale.

[0007] Furthermore, a second electrically controlled valve is fixedly connected to the side of the pressure relief pipe, and a second manually operated valve is also fixedly connected to the side of the pressure relief pipe.

[0008] Furthermore, a first air guide tube is fixedly connected to the side of the connecting hose, the top end of the first air guide tube is fixedly connected to the side of the upper cavity, a first electric valve is fixedly connected to the side of the first air guide tube, and a first manual valve is fixedly connected to the side of the first air guide tube.

[0009] Furthermore, a second air guide tube is fixedly connected to the top end of the pressure relief tube, and the second air guide tube is located on the left side of the second diaphragm, with the side of the second air guide tube fixedly connected to the side of the upper cavity.

[0010] Furthermore, the structure of the first control switch is the same as that of the second control switch. The first control switch includes a mounting block, the bottom end of which is fixedly connected to the top end of the mounting cylinder. A return spring is fixedly connected to the top end of the mounting block, a pressure block is fixedly connected to the bottom end of the return spring, a buffer spring is fixedly connected to the inner wall of the top end of the mounting block, and a pressure switch is fixedly connected to the bottom end of the buffer spring.

[0011] Furthermore, a roller is movably sleeved at the bottom end of the pressure block, and a rounded corner is provided on the side of the slider.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] 1. This utility model divides the inflation chamber into an upper chamber and a lower chamber via a first diaphragm. The lower chamber is connected to the outer diaphragm of a double-diaphragm gas holder via a connecting pipe. When the pressure inside the double-diaphragm gas holder is too high, the outer diaphragm contracts, sending gas into the lower chamber of the inflation chamber. This increases the pressure on the first and second diaphragms, causing them to expand outwards. This, in turn, pushes the connecting rod to move the slider to the left until it contacts the first control switch. The first control switch then controls the second electrically controlled valve to open, releasing the gas from the outer diaphragm of the double-diaphragm gas holder until the pressure inside the outer diaphragm is balanced with the pressure inside the inner diaphragm. Once the pressure on both sides of the second diaphragm is balanced, the second diaphragm resets. When the slider separates from the first control switch, the first control switch controls the second solenoid valve to close. When the air pressure inside the inner membrane of the double-membrane gas holder decreases, the outer membrane expands, causing the air pressure in the lower cavity of the inflation chamber to decrease. The second diaphragm and the first diaphragm move inward towards the inflation chamber, causing the slider to move to the right until it contacts the second control switch. The second control switch controls the fan to run and inflate the outer membrane of the double-membrane gas holder, increasing its air pressure until the air pressure inside the lower cavity of the inflation chamber recovers. When the second diaphragm resets, the slider separates from the second control switch, and the second control switch controls the fan to stop, which helps ensure the normal operation of the equipment.

[0014] 2. This utility model allows gas to be introduced into or exhausted from the upper cavity by opening the first electric valve or the first manual valve. When the second diaphragm and the first diaphragm are in equilibrium, the outer and inner membranes inside the double-membrane gas holder maintain a certain air pressure, ensuring that the second diaphragm has sufficient deformation. This is beneficial for improving the air pressure regulation range of the equipment and enhancing its practicality.

[0015] 3. This utility model uses a marker rod that moves with the slider and uses the scale on the marker rod to determine the air pressure difference between the inner and outer membranes of the double membrane gas holder. The operator can manually open the second manual valve or start the fan to balance the air pressure, which is convenient for the operator to operate manually. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the main structure of the control cabinet of this utility model;

[0018] Figure 3 This is a schematic diagram of the constant pressure mechanism of this utility model;

[0019] Figure 4 This is a schematic cross-sectional view of the constant pressure mechanism of this utility model;

[0020] Figure 5This is a schematic diagram of the pressure relief pipe structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the control mechanism structure of this utility model;

[0022] Figure 7 This is a cross-sectional structural diagram of the control mechanism of this utility model;

[0023] Figure 8 For the present utility model Figure 7 Schematic diagram of the structure at point A.

[0024] The attached diagram is labeled as follows: 1. Control cabinet body; 101. External frame; 102. Side panel; 103. Control panel; 104. Electrical components; 2. Control mechanism; 201. Mounting cylinder; 202. First control switch; 2021. Return spring; 2022. Buffer spring; 2023. Pressure switch; 2024. Pressure block; 2025. Mounting block; 2026. Roller; 203. Second control switch; 204. Marker rod; 205. 206. Connecting rod; 207. Slider; 208. Rounded corner; 3. Constant pressure mechanism; 301. Inflation chamber; 302. Connecting pipe; 303. Fan; 304. Connecting hose; 305. Pressure relief pipe; 306. First air guide pipe; 307. First manual valve; 308. First electric valve; 309. Second air guide pipe; 310. Upper chamber; 311. First diaphragm; 312. Second diaphragm; 313. Second electric control valve; 314. Second manual valve. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The constant pressure dual-membrane control cabinet involved in this utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] Reference Figures 1 to 8This utility model provides a constant pressure dual-membrane control cabinet, including a control cabinet body 1, and further including: a control mechanism 2 and a constant pressure mechanism 3. The bottom inner wall of the control cabinet body 1 is fixedly connected to the bottom of the constant pressure mechanism 3, and the side of the control mechanism 2 is fixedly connected to the side of the constant pressure mechanism 3. The control cabinet body 1 includes an outer frame 101, an electrical component 104 is fixedly connected to the bottom inner wall of the outer frame 101, and a control panel 103 is fixedly connected to the side of the outer frame 101. The constant pressure mechanism 3 includes a fan 303, the bottom of the fan 303 is fixedly connected to the bottom inner wall of the outer frame 101, an air chamber 301 is fixedly connected to the side inner wall of the outer frame 101, and a connecting hose 304 is fixedly connected to the output end of the fan 303. The top end is fixedly connected to the bottom end of the inflation chamber 301. A first diaphragm 311 is fixedly connected to the inner side wall of the inflation chamber 301. The top end of the inflation chamber 301 has an upper cavity 310. A pressure relief pipe 305 is fixedly connected to the side of the inflation chamber 301. A second diaphragm 312 is fixedly connected to the inner side wall of the pressure relief pipe 305. The control mechanism 2 includes an installation cylinder 201. A slider 206 is movably connected to the inner side wall of the installation cylinder 201. A connecting rod 205 is fixedly connected to the side of the slider 206. The side of the connecting rod 205 is fixedly connected to the side of the second diaphragm 312. The side of the installation cylinder 201 is fixedly connected to the side of the pressure relief pipe 305. A first control switch 202 is fixedly connected to the top end of the installation cylinder 201. A second control switch 202 is fixedly connected to the top end of the installation cylinder 201. The control switch 203 and the side plate 102 are movably connected to the side of the external frame 101 via pins. The connecting pipe 302 is connected to the outer membrane of the double-membrane gas holder. During equipment operation, the detection probe inside the double-membrane gas holder detects the air pressure values ​​in the inner and outer membranes of the double-membrane gas holder, and the data is processed by the electrical components 104. When the air pressure in the inner membrane is low, the fan 303 is controlled to run, and gas is injected into the outer membrane of the double-membrane gas holder through the connecting hose 304, the inflation chamber 301, and the connecting pipe 302, causing the outer membrane to expand and compress the inner membrane, thereby increasing the air pressure in the inner membrane. When the air pressure in the inner membrane is high, the second solenoid valve 313 is controlled to open and discharge the air in the inner membrane, causing the inner membrane to expand and thus reducing the air pressure in the inner membrane. When the monitoring probe is not running, the inflation chamber 301 is divided into an upper chamber 31 by the first diaphragm 311. The lower chamber is connected to the outer membrane of the double-membrane gas holder via a connecting pipe 302. When the pressure inside the double-membrane gas holder is too high, the outer membrane contracts, sending gas into the lower chamber of the inflation chamber 301. This increases the pressure on the first diaphragm 311 and the second diaphragm 312, causing them to expand outwards. This causes the connecting rod 205 to push the slider 206 to the left until it contacts the first control switch 202. The first control switch 202 controls the second solenoid valve 313 to open, venting the gas from the outer membrane of the double-membrane gas holder until the gas pressure inside the outer membrane is balanced with the gas pressure inside the inner membrane. When the gas pressure on both sides of the second diaphragm 312 is balanced, the second diaphragm 312 resets. The slider 206 separates from the first control switch 202, and the first control switch 202 controls the second solenoid valve 313 to close. When the gas pressure inside the inner membrane of the double-membrane gas holder decreases...The expansion of the outer membrane reduces the air pressure in the lower cavity of the inflation chamber 301. The second diaphragm 312 and the first diaphragm 311 move inwards towards the inflation chamber 301, causing the slider 206 to move to the right until it contacts the second control switch 203. The second control switch 203 then controls the fan 303 to operate, inflating the outer membrane of the double-membrane air tank and increasing its pressure until the air pressure inside the lower cavity of the inflation chamber 301 returns to normal. When the second diaphragm 312 resets, the slider 206 separates from the second control switch 203, and the second control switch 203 stops the fan 303.

[0027] The slider 206 is fixedly connected to a marking rod 204 on its side. The marking rod 204 has a scale on its side. The marking rod 204 moves with the slider 206 and the pressure difference between the inner and outer membranes of the double membrane gas holder is determined by the scale on the marking rod 204.

[0028] The pressure relief pipe 305 is fixedly connected to a second electrically controlled valve 313 on its side, and a second manually controlled valve 314 is fixedly connected to its side. The operator manually opens the second manually controlled valve 314 to release the gas inside the outer membrane of the double membrane gas holder to relieve pressure.

[0029] The first air guide pipe 306 is fixedly connected to the side of the connecting hose 304. The top end of the first air guide pipe 306 is fixedly connected to the side of the upper cavity 310. The first electric valve 308 and the first manual valve 307 are fixedly connected to the side of the first air guide pipe 306. When the equipment is installed, the first electric valve 308 or the first manual valve 307 is opened to fill or exhaust gas into the upper cavity 310. When the second diaphragm 312 and the first diaphragm 311 are balanced, the outer and inner membranes inside the double membrane gas holder maintain a certain air pressure to ensure that the second diaphragm 312 has sufficient deformation.

[0030] The pressure relief pipe 305 is fixedly connected to the top end of the second air guide pipe 309, and the second air guide pipe 309 is located on the left side of the second diaphragm 312. The side of the second air guide pipe 309 is fixedly connected to the side of the upper cavity 310. The upper cavity 310 and the pressure relief pipe 305 are connected through the second air guide pipe 309. The air pressure inside the upper cavity 310 is a preset constant air pressure value when the inner and outer membranes of the double membrane gas holder are in balance.

[0031] The structure of the first control switch 202 is the same as that of the second control switch 203. The first control switch 202 includes a mounting block 2025, the bottom end of which is fixedly connected to the top end of the mounting cylinder 201. A return spring 2021 is fixedly connected to the top end of the mounting block 2025, and a pressure block 2024 is fixedly connected to the bottom end of the return spring 2021. A buffer spring 2022 is fixedly connected to the inner wall of the top end of the mounting block 2025, and a pressure switch 2023 is fixedly connected to the bottom end of the buffer spring 2022. The slider 206 moves... When the slider 206 moves to the position of the first control switch 202, it contacts the pressure block 2024, causing the pressure block 2024 to retract into the mounting block 2025 and contact the pressure switch 2023. The pressure switch 2023 controls the second solenoid valve 313 to open to release pressure until the inner and outer membranes of the double-membrane gas holder are balanced. Then, the slider 206 moves to the right and separates from the pressure block 2024. The return spring 2021 pushes the pressure block 2024 downward, separating the pressure block 2024 from the pressure switch 2023. The pressure switch 2023 then controls the second solenoid valve 313 to close.

[0032] Among them, the bottom end of the pressure block 2024 is movably sleeved with a roller 2026, and the side of the slider 206 is provided with an arc corner 207. When the slider 206 moves to the position of the pressure block 2024, it contacts the roller 2026 through the arc corner 207 to avoid jamming.

[0033] The working principle of this utility model is as follows: During equipment installation, by opening the first electric valve 308 or the first manual valve 307, gas is injected into or vented from the upper cavity 310. When the second diaphragm 312 and the first diaphragm 311 are balanced, the outer and inner membranes inside the double-membrane gas holder maintain a certain air pressure, ensuring that the second diaphragm 312 has sufficient deformation. During equipment operation, the detection probe inside the double-membrane gas holder detects the air pressure values ​​inside the inner and outer membranes of the double-membrane gas holder, and these values ​​are processed by the electrical components 104. When the air pressure inside the inner membrane is low, the blower 303 is controlled to run, and gas is injected through the connecting hose 304, the inflation chamber 301, and the connecting pipe 302 into the upper cavity 310. Gas is injected into the outer membrane of the dual-membrane gas holder, causing it to expand and compress the inner membrane, thus increasing the air pressure inside the inner membrane. When the inner membrane pressure is high, the second solenoid valve 313 opens to release the air from the inner membrane, causing it to expand and thus lower the inner membrane pressure. When the monitoring probe is not in operation, the inflation chamber 301 is divided into an upper chamber 310 and a lower chamber by the first diaphragm 311. The lower chamber is connected to the outer membrane of the dual-membrane gas holder via a connecting pipe 302. When the pressure inside the dual-membrane gas holder is too high, the outer membrane contracts, sending gas into the lower chamber of the inflation chamber 301, increasing the pressure on the first diaphragm 311 and the second diaphragm 312, causing them to expand outwards, thereby causing the connecting rod to... 205 pushes slider 206 to move to the left until it contacts the first control switch 202. The first control switch 202 controls the second solenoid valve 313 to open, venting gas from the outer membrane of the double-membrane gas holder until the gas pressure in the outer membrane is balanced with the gas pressure in the inner membrane. The gas pressure on both sides of the second diaphragm 312 is balanced, causing the second diaphragm 312 to reset. Slider 206 separates from the first control switch 202. The first control switch 202 controls the second solenoid valve 313 to close. When the gas pressure in the inner membrane of the double-membrane gas holder decreases, the outer membrane expands, causing the gas pressure in the lower cavity of the inflation chamber 301 to decrease. The second diaphragm 312 and the first diaphragm 311 move inward toward the inflation chamber 301, causing slider 206 to move to the left. Block 206 moves to the right until it contacts the second control switch 203. The second control switch 203 controls the fan 303 to run and inflate the outer membrane of the double-membrane gas holder, increasing its air pressure until the air pressure inside the lower cavity of the inflation chamber 301 is restored. When the second diaphragm 312 is reset, the slider 206 separates from the second control switch 203, and the second control switch 203 controls the fan 303 to stop. Alternatively, the marker rod 204 moves with the slider 206, and the pressure difference between the inner and outer membranes of the double-membrane gas holder is determined by the scale on the marker rod 204. The operator manually opens the second manual valve 314 or starts the fan 303 to balance the air pressure.

[0034] 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 constant pressure dual-membrane control cabinet, comprising a control cabinet body (1), characterized in that, Also includes: The control cabinet body (1) includes a control mechanism (2) and a constant pressure mechanism (3). The bottom inner wall of the control cabinet body (1) is fixedly connected to the bottom of the constant pressure mechanism (3). The side of the control mechanism (2) is fixedly connected to the side of the constant pressure mechanism (3). The control cabinet body (1) includes an outer frame (101). An electrical component (104) is fixedly connected to the bottom inner wall of the outer frame (101). A control panel (103) is fixedly connected to the side of the outer frame (101). The constant pressure mechanism (3) includes a fan (303). The bottom of the fan (303) is fixedly connected to the bottom inner wall of the outer frame (101). An inflation chamber (301) is fixedly connected to the side inner wall of the outer frame (101). A connecting hose (304) is fixedly connected to the output end of the fan (303). The top end of the connecting hose (304) is fixedly connected to the bottom of the inflation chamber (301). The side inner wall of the inflation chamber (301) is fixedly connected to... The system includes a first diaphragm (311), an upper cavity (310) at the top of the inflation chamber (301), a pressure relief pipe (305) fixedly connected to the side of the inflation chamber (301), a second diaphragm (312) fixedly connected to the inner wall of the side of the pressure relief pipe (305), a control mechanism (2) including an installation cylinder (201), a slider (206) movably connected to the inner wall of the side of the installation cylinder (201), a connecting rod (205) fixedly connected to the side of the slider (206), the side of the connecting rod (205) fixedly connected to the side of the second diaphragm (312), the side of the installation cylinder (201) fixedly connected to the side of the pressure relief pipe (305), a first control switch (202) fixedly connected to the top of the installation cylinder (201), a second control switch (203) fixedly connected to the top of the installation cylinder (201), and a side plate (102) movably connected to the side of the outer frame (101) by a pin.

2. The constant pressure dual-membrane control cabinet according to claim 1, characterized in that: A marking rod (204) is fixedly connected to the side of the slider (206), and the side of the marking rod (204) is provided with scale.

3. The constant pressure dual-diaphragm control cabinet according to claim 1, characterized in that: A second electrically controlled valve (313) is fixedly connected to the side of the pressure relief pipe (305), and a second manually operated valve (314) is fixedly connected to the side of the pressure relief pipe (305).

4. The constant pressure dual-membrane control cabinet according to claim 1, characterized in that: The first air guide tube (306) is fixedly connected to the side of the connecting hose (304). The top end of the first air guide tube (306) is fixedly connected to the side of the upper cavity (310). The first electric valve (308) is fixedly connected to the side of the first air guide tube (306). The first manual valve (307) is fixedly connected to the side of the first air guide tube (306).

5. A constant pressure dual-membrane control cabinet according to claim 1, characterized in that: The top end of the pressure relief pipe (305) is fixedly connected to a second air guide pipe (309), and the second air guide pipe (309) is located on the left side of the second diaphragm (312). The side of the second air guide pipe (309) is fixedly connected to the side of the upper cavity (310).

6. A constant pressure dual-membrane control cabinet according to claim 1, characterized in that: The structure of the first control switch (202) is the same as that of the second control switch (203). The first control switch (202) includes a mounting block (2025). The bottom end of the mounting block (2025) is fixedly connected to the top end of the mounting cylinder (201). A reset spring (2021) is fixedly connected to the top end of the mounting block (2025). A pressure block (2024) is fixedly connected to the bottom end of the reset spring (2021). A buffer spring (2022) is fixedly connected to the inner wall of the top end of the mounting block (2025). A pressure switch (2023) is fixedly connected to the bottom end of the buffer spring (2022).

7. A constant pressure dual-membrane control cabinet according to claim 6, characterized in that: The bottom end of the pressure block (2024) is movably fitted with a roller (2026), and the side of the slider (206) is provided with an arc corner (207).

Images