Discharge port negative pressure device for silicone production

Abstract

The application discloses a discharging port negative pressure device for silicone production, which comprises a feeding assembly, a material tank is connected to one end of the feeding assembly through a connecting pipe, a valve assembly is arranged at the lower end of the material tank, a driving assembly and a switching assembly are arranged on the two sides of the feeding assembly respectively, the switching assembly is used for switching the valve port of the valve assembly, a gas path assembly is further arranged between the driving assembly and the switching assembly, and the driving assembly and the gas path assembly are used for driving the feeding assembly and the switching assembly to operate in a staggered mode. The driving assembly, the switching assembly and the gas path assembly are arranged, so that the switching of the three-way valve core and the feeding operation of the material suction cylinder use the same power, the switching of the three-way valve core does not need to be controlled separately, the control system is effectively simplified, and the equipment operation is simpler and more convenient.

Description

Technical Field

[0001] This invention relates to the field of organosilicon production equipment technology, and more particularly to a negative pressure device for the feed inlet in organosilicon production. Background Technology

[0002] Organosilicon products possess a unique structure that combines the properties of both inorganic and organic materials. They exhibit fundamental properties such as low surface tension, low viscosity-temperature coefficient, high compressibility, and high gas permeability. Furthermore, they possess excellent characteristics including resistance to high and low temperatures, electrical insulation, oxidation stability, weather resistance, flame retardancy, hydrophobicity, corrosion resistance, non-toxicity, odorlessness, and physiological inertness. These properties make them widely used in aerospace, electronics, construction, transportation, chemical, textile, food, light industry, and medical industries. With the continuous growth in the quantity and variety of organosilicon products and the expanding application areas, organosilicon products have become a unique and important product system in the chemical new materials industry, and the demand for their production is constantly increasing.

[0003] In the production of organosilicon, due to the high viscosity and low flowability of the organosilicon product, a plunger filling machine is generally used for filling operations. The plunger filling machine, also known as a piston filling machine, is a filling machine for filling high-concentration fluids. It uses a cylinder to drive a piston and a three-way rotary valve to extract and eject high-concentration materials, and uses a reed switch to control the stroke of the cylinder to adjust the filling volume. In use, the three-way switching of the rotary valve is driven by a separate cylinder, while the extraction and ejection of materials are controlled and driven by another separate cylinder. The two cylinders work together to operate, and there are many control components. In order to further simplify the control system, a negative pressure device for the discharge port of organosilicon production is provided. Summary of the Invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a negative pressure device for the feed port of organosilicon production. By setting up a drive component, a switching component and a pneumatic circuit component, the switching of the three-way valve core and the feeding operation of the feeding cylinder use the same power, eliminating the need for separate control of the switching of the three-way valve core, effectively simplifying the control system and making the equipment operation simpler and more convenient.

[0005] The present invention proposes a negative pressure device for the discharge port of organosilicon production, comprising a feeding assembly, one end of which is connected to a material box via a connecting pipe, a valve assembly being provided at the lower end of the material box, a driving assembly and a switching assembly being provided on both sides of the feeding assembly, the switching assembly being used to switch the valve port of the valve assembly, and an air circuit assembly being provided between the driving assembly and the switching assembly, the driving assembly and the air circuit assembly cooperating to drive the feeding assembly and the switching assembly to operate in staggered time.

[0006] Preferably, the valve assembly includes a housing, a three-way valve core, and a rotating arm;

[0007] The outer shell is fixedly installed at the bottom of the material box, and the inner cavity of the outer shell is in communication with the inner cavity of the material box and the inner cavity of the connecting pipe. The outer shell is also connected to a filling head valve through a pipe.

[0008] The three-way valve core is rotatably connected to the inside of the housing. The rotation of the three-way valve core can switch the conduction state between the feeding assembly and the hopper / filling head valve.

[0009] The rotating arm is located on the outer side of the housing and passes through the housing via a rotating shaft to be fixedly connected to the three-way valve core. The rotating arm drives the rotation of the three-way valve core.

[0010] Preferably, the feeding assembly includes a feeding cylinder, one end of which is connected to the connecting pipe. The feeding cylinder is interference-fitted with a first piston. A first stop rod is provided at the end of the first piston away from the connecting pipe. The end of the first stop rod away from the first piston passes through the feeding cylinder and is connected to the driving assembly.

[0011] Preferably, the drive assembly includes a pneumatic push rod, a connecting seat, a U-shaped buffer seat, and a connecting block;

[0012] The connecting block is connected to one end of the first stopper rod, and the loop-shaped buffer seat is sleeved on the outside of the first stopper rod and the connecting block. One end of the loop-shaped buffer seat is provided with a slot for the connecting block to pass through and rotate.

[0013] The pneumatic push rods are distributed on one side of the material extraction cylinder, the connecting seat is fixed to the output end of the pneumatic push rods, and the connecting seat is fixedly connected to one end of the U-shaped buffer seat.

[0014] Preferably, the switching assembly includes an air cylinder, a second stopper rod, a second piston, a connecting rod, a linkage crossbar, a first exhaust port, and a second exhaust port;

[0015] The air cylinder is distributed on one side of the suction cylinder, the connecting rod is fixed to one end of the air cylinder, and the linkage crossbar is fixed to one side of the end of the connecting rod and is connected to the valve assembly in a transmission manner.

[0016] The second stopper rod extends from the other end of the air cylinder into the interior of the air cylinder and is fixedly connected to the second piston; one end of the second stopper rod is fixedly connected to the connecting seat.

[0017] The first exhaust port and the second exhaust port are symmetrically fixed to the top of the outer wall of the air cylinder and are in communication with the inner cavity of the air cylinder.

[0018] Preferably, the air passage assembly includes a first L-shaped air groove, a second L-shaped air groove, a first air pipe, a second air pipe, and a sealing unit;

[0019] The first L-shaped air groove and the second L-shaped air groove are symmetrically opened at the top of the inner part of the U-shaped buffer seat, and the top of the vertical part of the first L-shaped air groove and the second L-shaped air groove both penetrate to the top of the U-shaped buffer seat. The ends of the horizontal part of the first L-shaped air groove and the second L-shaped air groove respectively penetrate to both sides of the U-shaped buffer seat.

[0020] One end of the first air tube and the second air tube are respectively connected to the first L-shaped air groove and the second L-shaped air groove, and the other end of the first air tube and the second air tube are respectively connected to the first exhaust port and the second exhaust port;

[0021] The sealing unit is provided in two sets and symmetrically distributed inside the U-shaped buffer seat and extends to the inside of the first L-shaped air groove and the second L-shaped air groove. By moving the connecting block inside the U-shaped buffer seat, the two sets of sealing units are squeezed to realize the switching operation of the first L-shaped air groove and the second L-shaped air groove between the open and closed states.

[0022] Preferably, the sealing unit includes a compression block, a sealing plug, a spring, a storage groove, and a lifting groove hole;

[0023] The storage slot is located on the inner top of the U-shaped buffer seat, and the lifting slot hole is located on the top of the storage slot and extends through the horizontal part of the first L-shaped air slot and the second L-shaped air slot.

[0024] The extrusion block is slidably connected to the inside of the storage groove, and the sealing plug is fixed to the top of the extrusion block and slidably connected to the inside of the lifting groove hole. By moving the sealing plug upward, the horizontal parts of the first L-shaped air groove and the second L-shaped air groove can be sealed.

[0025] The springs are distributed inside the lifting slot holes, and the two ends of the springs are fixedly connected to the top of the inner wall of the lifting slot holes and the top of the sealing block, respectively.

[0026] Preferably, the bottom of the material extraction cylinder, the pneumatic push rod, and the air cylinder are provided with a base, and the top of the base is fixedly connected to a fixing seat for fixing the material extraction cylinder and the pneumatic push rod.

[0027] Preferably, a first limiting seat and a second limiting seat are respectively installed at the top of the base at both ends of the air cylinder. The connecting rod passes through the first limiting seat and is slidably connected to it, and the second stop rod passes through the second limiting seat and is slidably connected to it. The first limiting seat and the second limiting seat are used to support the switching component and limit the movement of the air cylinder.

[0028] Beneficial technical effects of the present invention:

[0029] This invention, by setting up a drive component, a switching component, and a pneumatic circuit component, enables the switching of the three-way valve core and the feeding operation of the feeding cylinder to use the same power, eliminating the need for separate control of the switching of the three-way valve core, effectively simplifying the control system, and making the equipment operation simpler and more convenient. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the negative pressure device for the feed inlet in organosilicon production proposed in this invention;

[0031] Figure 2 This is a schematic diagram of the negative pressure device for the feed port in organosilicon production from another perspective proposed in this invention.

[0032] Figure 3 This is a cross-sectional view of the outer shell, the material extraction cylinder, and the loop-shaped buffer seat proposed in this invention.

[0033] Figure 4 This is a cross-sectional view of the air cylinder proposed in this invention;

[0034] Figure 5 This is a schematic diagram of the gas path assembly proposed in this invention;

[0035] Figure 6 This is an exploded view of the sealing unit proposed in this invention;

[0036] Figure 7 This is a cross-sectional view of the three-way valve core proposed in this invention.

[0037] In the diagram: 1-material bin, 2-valve assembly, 201-outer shell, 202-three-way valve core, 203-rotating arm, 3-connecting pipe, 4-filling head valve, 5-feeding assembly, 501-extraction cylinder, 502-first stopper rod, 503-first piston, 6-drive assembly, 601-pneumatic push rod, 602-connecting seat, 603-return buffer seat, 604-connecting block, 7-switching assembly, 701-air cylinder, 702-second stopper rod, 703-second piston, 7 04-Connecting rod, 705-Linkage crossbar, 706-First exhaust port, 707-Second exhaust port, 8-Air circuit assembly, 801-First L-shaped air groove, 802-Second L-shaped air groove, 803-First air pipe, 804-Second air pipe, 805-Sealing unit, 8051-Squeezing block, 8052-Sealing plug, 8053-Spring, 8054-Storage groove, 8055-Lifting groove hole, 9-Base, 10-First limiting seat, 11-Second limiting seat. Detailed Implementation

[0038] The present invention will be further explained below with reference to specific embodiments.

[0039] Reference Figure 1-3The present invention proposes a negative pressure device for the discharge port of organosilicon production, which includes a valve assembly 2 installed at the bottom of the material box 1. The two ends of the outer wall of the valve assembly 2 are respectively connected to a filling head valve 4 and a feeding assembly 5 through connecting pipes 3. The feeding assembly 5 includes a suction cylinder 501, a first stopper rod 502 and a first piston 503. The suction cylinder 501 is fixed to one end connected to a connecting pipe 3. The first stopper rod 502 passes through the other end of the suction cylinder 501 to the inner side of the suction cylinder 501 and is fixedly connected to the first piston 503. A drive assembly 6 and a switching assembly 7 are respectively distributed on both sides of the feeding assembly 5, and an air passage assembly 8 is provided between the drive assembly 6 and the switching assembly 7. The switching assembly 7 is used to switch the valve port of the valve assembly 2. The drive assembly 6 and the air passage assembly 8 cooperate to drive the feeding assembly 5 and the switching assembly 7 to operate in a staggered manner.

[0040] As a preferred embodiment of the present invention, refer to Figure 4 and Figure 5 The switching assembly 7 includes an air cylinder 701, a second stopper rod 702, a second piston 703, a connecting rod 704, a linkage crossbar 705, a first exhaust port 706, and a second exhaust port 707. The air cylinder 701 is distributed on one side of the extraction cylinder 501. The connecting rod 704 is fixed to one end of the air cylinder 701. The linkage crossbar 705 is fixed to one side of the end of the connecting rod 704 and is connected to the valve assembly 2. The second stopper rod 702 passes through the other end of the air cylinder 701 into the interior of the air cylinder 701 and is fixedly connected to the second piston 703. The first exhaust port 706 and the second exhaust port 707 are symmetrically fixed to the top of the outer wall of the air cylinder 701 and are in communication with the inner cavity of the air cylinder 701.

[0041] As a preferred embodiment of the present invention, refer to Figure 1 , Figure 4 and Figure 5 The drive assembly 6 includes a pneumatic push rod 601, a connecting seat 602, a loop-shaped buffer seat 603, and a connecting block 604. The connecting block 604 is fixed to the other end of the first stopper 502. The loop-shaped buffer seat 603 is sleeved on the outside of the first stopper 502 and the connecting block 604, and one end of the loop-shaped buffer seat 603 is provided with a through-rotation slot for the connecting block 604. The pneumatic push rod 601 is distributed on the other side of the feed cylinder 501. The connecting seat 602 is fixed to the output end of the pneumatic push rod 601, and the connecting seat 602 is fixedly connected to the other end of the loop-shaped buffer seat 603 and the second stopper 702.

[0042] As a preferred embodiment of the present invention, refer to Figure 4The air path assembly 8 includes a first L-shaped air groove 801, a second L-shaped air groove 802, a first air pipe 803, a second air pipe 804, and a sealing unit 805. The first L-shaped air groove 801 and the second L-shaped air groove 802 are symmetrically opened at the top of the inner part of the U-shaped buffer seat 603, and the top of the vertical part of the first L-shaped air groove 801 and the second L-shaped air groove 802 both extend to the top of the U-shaped buffer seat 603. The ends of the horizontal parts of the first L-shaped air groove 801 and the second L-shaped air groove 802 respectively extend to both sides of the U-shaped buffer seat 603. One end of the first air pipe 803 and the second air pipe 804 are respectively connected to the first L-shaped air groove 801, the second L-shaped air groove 802, the first air pipe 803, the second air pipe 804, and the sealing unit 805. The first L-shaped air groove 801 and the second L-shaped air groove 802, the other ends of the first air pipe 803 and the second air pipe 804 are respectively connected to the first exhaust port 706 and the second exhaust port 707; the sealing unit 805 is provided in two sets, and the two sets of sealing units 805 are symmetrically distributed on the inner side of the loop-shaped buffer seat 603 and extend to the inner side of the first L-shaped air groove 801 and the second L-shaped air groove 802. By moving the connecting block 604 on the inner side of the loop-shaped buffer seat 603, the two sets of sealing units 805 are squeezed respectively, which can realize the switching operation of the first L-shaped air groove 801 and the second L-shaped air groove 802 between the conduction and cut-off states.

[0043] As a preferred embodiment of the present invention, refer to Figure 5 and Figure 6 The sealing unit 805 includes a compression block 8051, a sealing plug 8052, a spring 8053, a storage groove 8054, and a lifting groove 8055. The storage groove 8054 is located on the top inner side of the U-shaped buffer seat 603, and the lifting groove 8055 is located on the top of the storage groove 8054 and extends through the transverse portions of the first L-shaped air groove 801 and the second L-shaped air groove 802. The compression block 8051 is slidably connected to the inner side of the storage groove 8054, and the sealing plug 8052 is fixed to the top of the compression block 8051 and slidably connected to the inner side of the lifting groove 8055. By moving the sealing plug 8052 upward, the transverse portions of the first L-shaped air groove 801 and the second L-shaped air groove 802 can be sealed. The spring 8053 is distributed inside the lifting groove 8055, and the two ends of the spring 8053 are fixedly connected to the top inner wall of the lifting groove 8055 and the top of the sealing plug 8052, respectively.

[0044] As a preferred embodiment of the present invention, refer to Figure 2 , Figure 3 and Figure 7The valve assembly 2 includes a housing 201, a three-way valve core 202, and a rotating arm 203. The housing 201 is fixedly installed at the bottom of the material box 1, and the inner cavity of the housing 201 is connected to the inner cavity of the material box 1 and the inner side of the connecting pipe 3. The three-way valve core 202 is rotatably connected to the inner side of the housing 201. The rotation of the three-way valve core 202 can realize the switching of the connection state between the material extraction cylinder 501 and the material box 1 and between the material extraction cylinder 501 and the filling head valve 4. The rotating arm 203 is distributed on the outer side of the housing 201 and passes through the housing 201 through the rotating shaft and is fixedly connected to the three-way valve core 202. The linkage crossbar 705 is slidably connected to the rotating arm 203. A straight groove is opened at the position where the rotating arm 203 contacts the linkage crossbar 705. The outer wall diameter of the linkage crossbar 705 matches the inner wall diameter of the straight groove.

[0045] In addition, refer to Figure 1 and Figure 2 The bottom of the material extraction cylinder 501, the pneumatic push rod 601, and the air cylinder 701 is provided with a base 9. The top of the base 9 is fixedly connected to a fixing seat for fixing the material extraction cylinder 501 and the pneumatic push rod 601. The top of the base 9 is provided with a first limiting seat 10 and a second limiting seat 11 at both ends of the air cylinder 701. The connecting rod 704 passes through the first limiting seat 10 and is slidably connected to it. The second stop rod 702 passes through the second limiting seat 11 and is slidably connected to it. The first limiting seat 10 and the second limiting seat 11 are used to support the switching component 7 and to limit the movement of the air cylinder 701.

[0046] In this embodiment: the silicone product to be filled is placed inside the material box 1. The initial state of the three-way valve core 202 is to connect the material extraction cylinder 501 and the filling head valve 4. At this time, the first piston 503 is located at one end of the material extraction cylinder 501 near the three-way valve core 202. The connecting block 604 is located at one end of the loop-shaped buffer seat 603 away from the material extraction cylinder 501 and squeezes a set of sealing units 805 located above it. At this time, the second L-shaped air groove 802 is cut off and the first L-shaped air groove 801 is connected. At the same time, the air between the second piston 703 and the second exhaust port 707 inside the air cylinder 701 is compressed.

[0047] When the filling operation begins, the pneumatic push rod 601 is activated. The pneumatic push rod 601 drives the return-shaped buffer seat 603 and the second stopper 702 to move simultaneously through the connecting seat 602. The first stopper 502 drives the second piston 703 away from the second exhaust port 707. At this time, due to the reaction force of the compressed air on the air cylinder 701, the air cylinder 701 and the first limit seat 10 are kept in a squeezed and close state and remain temporarily stationary. At the same time, when the return-shaped buffer seat 603 moves, the connecting block 604 remains stationary, that is, the first stopper 502 remains temporarily stationary.

[0048] When the U-shaped buffer seat 603 moves to position the connecting block 604 in the middle of the U-shaped buffer seat 603, the connecting block 604 does not contact the two sets of sealing units 805. At this time, both sets of sealing units 805 are in the open state, that is, the first L-shaped air groove 801 and the second L-shaped air groove 802 are in the conductive state, so that external air enters into the air cylinder 701, so that the air pressure at both ends of the second piston 703 returns to the normal pressure state, and the reaction force on the air cylinder 701 disappears.

[0049] Then, the U-shaped buffer seat 603 continues to move, causing the connecting block 604 to compress another set of sealing units 805. This sealing unit 805 moves upward to seal the first L-shaped air groove 801, thus creating a sealed space between the second piston 703 and the first exhaust port 706. The U-shaped buffer seat 603 continues to move, and the movement of the second piston 703 will compress the air between the second piston 703 and the first exhaust port 706, thus generating a pulling force on the air cylinder 701, causing the air cylinder 701 to move synchronously. The air cylinder 701 drives the rotating arm 203 to rotate through the connecting rod 704 and the linkage crossbar 705. When the rotating arm 203 drives the three-way valve core 202 to rotate, when the loop buffer seat 603 moves to the point where the connecting block 604 is in contact with the inner end face of the loop buffer seat 603, the three-way valve core 202 rotates exactly 90 degrees. At this time, the three-way valve core 202 is in the state of connecting the material extraction cylinder 501 and the material box 1, while the air cylinder 701 moves to the point where it is limited by the second limit seat 11 (it should be added that during the above steps, due to the small friction between the loop buffer seat 603 and the connecting block 604, the loop buffer seat 603 will not pull the connecting block 604 to move, thus keeping the first stop rod 502 stationary).

[0050] Finally, the pneumatic push rod 601 continues to operate. At this time, the loop-shaped buffer seat 603 pushes the connecting block 604, thus driving the first stop rod 502 to move synchronously. The first stop rod 502 moves the electric first piston 503, thus creating a negative pressure inside the extraction cylinder 501. This negative pressure draws the organosilicon product inside the material box 1 into the extraction cylinder 501. During this process, since the air cylinder 701 is limited and held in place by the second limit seat 11, the air between the second piston 703 and the first exhaust port 706 contracts when the second piston 703 continues to move (it should be noted that the maximum pressure of the compressed air inside the air cylinder 701 is less than the operating air pressure of the pneumatic push rod 601). This ensures that the extraction cylinder 501 is always subjected to a thrust, keeping the three-way valve core 202 in a stable state.

[0051] When a measured amount of silicone product is drawn into the suction cylinder 501, the pneumatic push rod 601 stops. Then, the pneumatic push rod 601 is started in reverse and the filling head valve 4 is opened simultaneously. When the reverse-moving pneumatic push rod 601 resets, its return-shaped buffer seat 603 and second stopper 702 move back synchronously, while the air cylinder 701 and first stopper 502 remain stationary. When the connecting block 604 is once again located in the middle of the return-shaped buffer seat 603, both L-shaped air grooves are fully open again, and the internal pressure of the air cylinder 701 recovers. Then, the connecting block 604... When 04 contacts a set of sealing units 805, the second L-shaped air groove 802 is cut off. This causes the second piston 703 to move, which drives the air cylinder 701 to move back synchronously. This causes the three-way valve core 202 to reset and rotate, making the suction cylinder 501 connected to the filling head valve 4. Then the first stopper 502 is squeezed and moved, pushing the first piston 503 to move. This causes the silicone product inside the suction cylinder 501 to move and be transported to the filling head valve 4, and then flow out through the filling head valve 4. This process is repeated to realize the filling operation of silicone products.

[0052] The cooperation of the above-mentioned components enables the switching of the three-way valve core 202 and the feeding operation of the feeding cylinder 501 to use the same power, eliminating the need for separate control of the switching of the three-way valve core 202, effectively simplifying the control system and making the equipment operation simpler and more convenient.

[0053] Please refer to this carefully. Figures 1 to 6 The inner length of the U-shaped buffer seat 603 is more than three times the length of the connecting block 604, and the distance between the two sealing units 805 is greater than the length of the connecting block 604.

[0054] In this embodiment: the structure ensures that when the connecting block 604 is located in the middle of the loop-shaped buffer seat 603, the connecting block 604 does not contact the two sets of sealing units 805, so that the two sets of sealing units 805 can be reset, and the first L-shaped air groove 801 and the second L-shaped air groove 802 are simultaneously in a conductive state, so that the internal air pressure of the air cylinder 701 is restored, thereby eliminating the thrust on the air cylinder 701.

[0055] Please refer to this carefully. Figures 1 to 7 The height of the connecting block 604 matches the inner height of the U-shaped buffer seat 603, the height of the extrusion block 8051 matches the height of the storage groove 8054, and the bottom two end corners of the extrusion block 8051 and the top two end corners of the connecting block 604 are all arc-shaped structures.

[0056] In this embodiment: during the movement of the U-shaped buffer seat 603, the contact between the connecting block 604 and the squeezing block 8051 causes the squeezing block 8051 to move upward. The squeezing block 8051 pushes the sealing block 8052 upward to seal the first L-shaped air groove 801 and the second L-shaped air groove 802. At this time, the spring 8053 is squeezed.

[0057] When the connecting block 604 separates from the extrusion block 8051, the sealing block 8052 and the extrusion block 8051 will move downward under the action of the spring 8053, thereby making the first L-shaped air groove 801 and the second L-shaped air groove 802 in a conductive state.

[0058] The arc-shaped structure of the extrusion block 8051 and the connecting block 604 is used to reduce the friction when the two come into contact with each other, so as to avoid excessive impact on the connecting block 604 and cause the connecting block 604 to shift.

[0059] Please refer to this carefully. Figures 4 to 5 The inner length of the air cylinder 701 is greater than the inner length of the material extraction cylinder 501, and the stroke of the pneumatic push rod 601 matches the travel stroke of the first plug rod 502.

[0060] In this embodiment: This structure enables the pneumatic push rod 601 to meet the maximum conveying capacity of the material extraction cylinder 501. At the same time, when the material extraction cylinder 501 reaches the maximum conveying capacity, there is still space between its second piston 703 and the end face of the air cylinder 701, thus providing conditions for air contraction and preventing excessive air pressure inside the air cylinder 701, ensuring normal operation of the equipment.

Claims

1. A negative pressure device for the feed inlet in organosilicon production, characterized in that, The feeding assembly (5) is connected to a material box (1) at one end via a connecting pipe (3). A valve assembly (2) is provided at the lower end of the material box (1). A drive assembly (6) and a switching assembly (7) are respectively provided on both sides of the feeding assembly (5). The switching assembly (7) is used to switch the valve port of the valve assembly (2). An air circuit assembly (8) is also provided between the drive assembly (6) and the switching assembly (7). The drive assembly (6) and the air circuit assembly (8) cooperate to drive the feeding assembly (5) and the switching assembly (7) to operate in a staggered manner. The feeding assembly (5) includes a feeding cylinder (501), a first stopper rod (502), and a first piston (503). The drive assembly (6) includes a pneumatic push rod (601), a connecting seat (602), a U-shaped buffer seat (603), and a connecting block (604). The connecting block (604) is connected to one end of the first stopper (502), and the loop-shaped buffer seat (603) is sleeved on the outside of the first stopper (502) and the connecting block (604), and one end of the loop-shaped buffer seat (603) is provided with a slot for the connecting block (604) to pass through and rotate. The pneumatic push rod (601) is distributed on one side of the feeding cylinder (501), the connecting seat (602) is fixed to the output end of the pneumatic push rod (601), and the connecting seat (602) is fixedly connected to one end of the loop-shaped buffer seat (603). The switching assembly (7) includes an air cylinder (701), a second piston rod (702), a second piston (703), a connecting rod (704), a linkage crossbar (705), a first exhaust port (706), and a second exhaust port (707). The air cylinder (701) is distributed on one side of the material extraction cylinder (501), the connecting rod (704) is fixed to one end of the air cylinder (701), and the linkage crossbar (705) is fixed to one side of the end of the connecting rod (704) and is connected to the valve assembly (2) in a transmission manner. The second stopper rod (702) extends from the other end of the air cylinder (701) into the interior of the air cylinder (701) and is fixedly connected to the second piston (703). One end of the second stopper rod (702) is fixedly connected to the connecting seat (602). The first exhaust port (706) and the second exhaust port (707) are symmetrically fixed to the top of the outer wall of the air cylinder (701) and are in communication with the inner cavity of the air cylinder (701); The air circuit assembly (8) includes a first L-shaped air groove (801), a second L-shaped air groove (802), a first air pipe (803), a second air pipe (804), and a sealing unit (805). The first L-shaped air groove (801) and the second L-shaped air groove (802) are symmetrically opened at the top of the inner part of the U-shaped buffer seat (603), and the top of the vertical part of the first L-shaped air groove (801) and the second L-shaped air groove (802) both extend to the top of the U-shaped buffer seat (603), and the ends of the horizontal part of the first L-shaped air groove (801) and the second L-shaped air groove (802) respectively extend to both sides of the U-shaped buffer seat (603); One end of the first air pipe (803) and the second air pipe (804) are respectively connected to the first L-shaped air groove (801) and the second L-shaped air groove (802), and the other end of the first air pipe (803) and the second air pipe (804) are respectively connected to the first exhaust port (706) and the second exhaust port (707). The blocking unit (805) is provided in two sets and symmetrically distributed inside the U-shaped buffer seat (603) and extends to the inside of the first L-shaped air groove (801) and the second L-shaped air groove (802). By moving the connecting block (604) inside the U-shaped buffer seat (603), the two sets of blocking units (805) are squeezed to realize the switching operation of the first L-shaped air groove (801) and the second L-shaped air groove (802) between the conducting and blocking states.

2. The negative pressure device for the feed inlet in organosilicon production according to claim 1, characterized in that, The valve assembly (2) includes a housing (201), a three-way valve core (202), and a rotating arm (203). The outer shell (201) is fixedly installed at the bottom of the material box (1), and the inner cavity of the outer shell (201) is connected to the inner cavity of the material box (1) and the inner cavity of the connecting pipe (3). The outer shell (201) is also connected to the filling head valve (4) through the pipe. The three-way valve core (202) is rotatably connected to the inside of the housing (201). The rotation of the three-way valve core (202) can realize the switching of the conduction state between the feeding assembly (5) and the material box (1) / filling head valve (4). The rotating arm (203) is located on the outer side of the housing (201) and passes through the shaft into the interior of the housing (201) and is fixedly connected to the three-way valve core (202). The rotating arm (203) drives the rotation of the three-way valve core (202).

3. The negative pressure device for the feed inlet in organosilicon production according to claim 1, characterized in that, One end of the material extraction cylinder (501) is connected to the connecting pipe (3). The material extraction cylinder (501) is fitted with a first piston (503). A first stopper rod (502) is provided at the end of the first piston (503) away from the connecting pipe (3). The end of the first stopper rod (502) away from the first piston (503) passes through the material extraction cylinder (501) and is connected to the drive assembly (6).

4. The negative pressure device for the feed inlet in organosilicon production according to claim 1, characterized in that, The sealing unit (805) includes a compression block (8051), a sealing plug (8052), a spring (8053), a storage groove (8054), and a lifting groove hole (8055). The storage slot (8054) is opened on the inner top of the U-shaped buffer seat (603), and the lifting slot hole (8055) is opened on the top of the storage slot (8054) and extends through the horizontal part of the first L-shaped air slot (801) and the second L-shaped air slot (802). The extrusion block (8051) is slidably connected to the inside of the storage groove (8054), and the sealing plug (8052) is fixed to the top of the extrusion block (8051) and slidably connected to the inside of the lifting groove (8055). By moving the sealing plug (8052) upward, the lateral parts of the first L-shaped air groove (801) and the second L-shaped air groove (802) can be sealed. The spring (8053) is distributed inside the lifting slot (8055), and the two ends of the spring (8053) are fixedly connected to the top of the inner wall of the lifting slot (8055) and the top of the sealing plug (8052), respectively.

5. The negative pressure device for the feed inlet in organosilicon production according to claim 1, characterized in that, The bottom of the material extraction cylinder (501), the pneumatic push rod (601), and the air cylinder (701) are provided with a base (9), and the top of the base (9) is fixedly connected with a fixing seat for fixing the material extraction cylinder (501) and the pneumatic push rod (601).

6. The negative pressure device for the feed inlet in organosilicon production according to claim 5, characterized in that, The top of the base (9) is located at both ends of the air cylinder (701) and a first limiting seat (10) and a second limiting seat (11) are respectively installed. The connecting rod (704) passes through the first limiting seat (10) and is slidably connected to it. The second stop rod (702) passes through the second limiting seat (11) and is slidably connected to it. The first limiting seat (10) and the second limiting seat (11) are used to support the switching component (7) and limit the movement of the air cylinder (701).

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