Flame retardant delivery pump

Abstract

The application discloses a fire-retardant conveying pump and relates to the technical field of variable-displacement pumps. The fire-retardant conveying pump comprises a pump main body; the pump main body comprises a pumping unit; the pumping unit comprises a first cylinder sleeve, a first piston arranged in the first cylinder sleeve and a sealing chamber between the first piston and the first cylinder sleeve; the pump main body further comprises a pressure regulating device in communication with the sealing chamber; the pressure regulating device comprises two first supporting plates, the side wall of each first supporting plate is fixedly connected with a liquid storage cylinder, the liquid storage cylinder is filled with cooling liquid, the liquid storage cylinder is in communication with the sealing chamber through a communication pipe, and a third piston is slidably connected in the liquid storage cylinder through a pushing mechanism. When the conveying pump is intermittently started, the fire-retardant conveying pump can assist the movement of the first piston, avoids damage to the motor assembly caused by excessively large starting resistance, and guarantees the service life of the conveying pump.

Description

Technical Field

[0001] This invention relates to the field of variable displacement pump technology, specifically to a flame retardant delivery pump. Background Technology

[0002] A piston pump is a positive displacement pump that relies on the reciprocating motion of a piston within the pump body to periodically change the volume of the working chamber, thereby alternately drawing in and discharging liquid. It converts the mechanical energy of the piston's reciprocating motion into liquid pressure energy. It belongs to the category of variable displacement pumps. The piston is driven to reciprocate within the pump body by a motor assembly module and can be used for conveying high-viscosity liquid flame retardants.

[0003] However, existing flame retardant delivery pumps require intermittent start-stop operation based on the flow rate of the flame retardant in the delivery pipe. When the flow rate is normal, the delivery pump can be stopped, and when the flow rate is low, the delivery pump can be restarted. However, due to the viscosity of high-viscosity liquid flame retardants, the internal friction of the flame retardant is large and it is easy to adhere when the delivery pump is started. At the same time, without pre-pressure and without flow inertia, the resistance when the piston moves is large, which leads to a large starting resistance of the delivery pump. This can easily cause damage to the motor assembly and affect the service life of the delivery pump. Summary of the Invention

[0004] The purpose of this invention is to provide a flame retardant delivery pump to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a flame retardant delivery pump, comprising a pump body; the pump body comprising a pumping unit; the pumping unit comprising a first cylinder liner, a first piston disposed within the first cylinder liner, and a sealing chamber located between the first piston and the first cylinder liner; the pump body further comprising a pressure regulating device communicating with the sealing chamber.

[0006] The pressure regulating device includes two first support plates, and a liquid storage cylinder is fixedly connected to the side wall of the first support plate. The liquid storage cylinder is filled with coolant and is connected to the sealed chamber through a connecting pipe. A third piston is slidably connected inside the liquid storage cylinder through a pushing mechanism.

[0007] Preferably, the delivery pump further includes a delivery pipe and an extraction mechanism connected to the first cylinder liner, and the extraction mechanism is used to extract the flame retardant remaining in the first cylinder liner when the pump body stops.

[0008] The extraction mechanism includes two second support plates, and a fixed cylinder is fixedly connected to the top of the second support plates. The fixed cylinder is fixedly inserted into the side wall of the conveying pipe, and a fourth piston is slidably connected inside the fixed cylinder through a lifting mechanism. A sealing ring is fixedly connected to the bottom of the fourth piston, and the fixed cylinder is connected to the first cylinder liner through an extraction pipe. A second solenoid valve is provided on the side wall of the extraction pipe, and an agitation mechanism for agitating the flame retardant in the fixed cylinder is provided on the top of the fourth piston. A retraction mechanism is provided on the side wall of the extraction pipe, and the retraction mechanism is used to retract the flame retardant in the fixed cylinder back into the first cylinder liner when the pump body is started.

[0009] Preferably, the pushing mechanism includes two T-shaped guide rods fixedly connected to the side wall of the second support plate, and a pushing plate is sleeved on the side wall of the T-shaped guide rods. An L-shaped frame is fixedly connected to the bottom of the lifting plate, and a bracket is fixedly connected to the top of the L-shaped frame. A first connecting rod is rotatably connected to the side wall of the bracket, and the other end of the first connecting rod is rotatably connected to the side wall of the pushing plate. A guide rod is fixedly connected to the end of the third piston, and the end of the guide rod away from the third piston passes through the end of the liquid storage cylinder and can abut against the pushing plate.

[0010] Preferably, the lifting mechanism includes a fixed plate fixedly connected to the side wall of the second support plate, and the top of the fixed plate is connected to a lifting plate via a lifting module, and the fourth piston is connected to the top of the lifting plate via a first spring telescopic rod.

[0011] Preferably, the agitation mechanism includes a mounting hole on the top of the fourth piston, and a rotating disk is rotatably connected in the mounting hole. A moving rod is inserted into the top of the rotating disk, and multiple blades are fixedly connected to the side wall of the moving rod. The rotating disk is sleeved on the side wall of the blades, and a drive assembly for driving the rotating disk to rotate is provided on the lifting plate.

[0012] Preferably, the drive assembly includes a first mounting groove formed on the lifting plate, and a first ball nut is fixedly inserted in the first mounting groove. A first ball screw is inserted in the first ball nut, and the upper end of the first ball screw is fixed to the lower end of the moving rod. An L-shaped block is fixedly connected to the bottom of the lifting plate, and a second spring telescopic rod is fixedly connected to the bottom of the L-shaped block. An mounting sleeve is fixedly connected to the upper end of the second spring telescopic rod, and the lower end of the first ball screw is rotatably connected to the inner wall of the mounting sleeve.

[0013] Preferably, the extrusion mechanism includes a fixed tube fixedly connected to the end of the first cylinder liner, and a movable tube inserted inside the fixed tube. The movable tube has multiple spray holes on its side wall, and an extrusion tube is fixedly connected to the side wall of the extraction tube. A third solenoid valve is provided on the side wall of the extrusion tube. An L-shaped plate is fixedly connected to the end of the first cylinder liner, and a second mounting groove is provided on the side wall of the L-shaped plate. A second ball nut is fixedly inserted in the second mounting groove, and a hollow second ball screw is inserted in the second ball nut. One end of the second ball screw is fixedly inserted into the end of the movable tube, and the upper end of the extrusion tube is connected to the second ball screw through a rotary joint. A rotating ring is rotatably connected to the side wall of the rotary joint, and the rotating ring is fixed to the side wall of the L-shaped plate by a return spring.

[0014] Preferably, the delivery pump further includes a base plate, a support frame, a motor assembly, and a second cylinder liner. The support frame is fixed to the top of the base plate, the motor assembly is fixed to the top of the support frame, the first support plate and the second support plate are fixed to the top of the base plate, and the volume of the first cylinder liner is twice the volume of the second cylinder liner. A second piston is slidably connected inside the second cylinder liner. The first cylinder liner is connected to the delivery pipe through a feed pipe, and a first one-way valve is provided inside the feed pipe. The second cylinder liner is connected to the first cylinder liner through a connecting pipe, and a second one-way valve is provided inside the connecting pipe. The second cylinder liner is connected to the delivery pipe through a discharge pipe, and a third one-way valve is provided inside the discharge pipe. A first solenoid valve is provided on the side wall of the feed pipe, the connecting pipe, and the discharge pipe. A first pushing component is provided at the output end of the motor assembly, and the first pushing component is used to push the first piston and the second piston to reciprocate.

[0015] Preferably, the first pushing component includes a disc fixedly connected to the output end of the motor assembly, and a connecting plate fixedly connected to the side wall of the disc. A first piston rod is inserted into the end of the first cylinder liner, and one end of the first piston rod is fixed to the first piston. A second piston rod is inserted into the end of the second cylinder liner, and one end of the second piston rod is fixed to the second piston. A second connecting rod is rotatably connected to the side wall of the connecting plate, and the other end of the second connecting rod is rotatably connected to the end of the first piston rod away from the first piston. The second piston rod is fixed to the first piston rod by a U-shaped bracket.

[0016] Preferably, a second pushing assembly is provided at the bottom of the first cylinder liner, and the second pushing assembly is used to reset the first piston when the pump body stops. The second pushing assembly includes a fixed block fixedly connected to the bottom of the first cylinder liner, and a moving block is connected to the side wall of the fixed block through a third spring telescopic rod. A pushing rod is fixedly connected to the side wall of the moving block, and the pushing rod passes through the side wall of the fixed block. An electromagnet is fixedly connected to the side wall of the fixed block, and an iron block is fixedly connected to the side wall of the moving block opposite to the electromagnet.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This type of flame retardant delivery pump, by setting up a pressure regulating device, can assist the movement of the first piston when the delivery pump is started intermittently, avoiding damage to the motor assembly due to excessive starting resistance and ensuring the service life of the delivery pump. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a partial cross-sectional view of the first cylinder liner, the second cylinder liner, and the liquid storage cylinder in this invention.

[0021] Figure 3 This is a schematic diagram of the extraction mechanism in this invention;

[0022] Figure 4 This is a schematic diagram of the pushing mechanism in this invention;

[0023] Figure 5 This is a partial cross-sectional view of the fixed cylinder in this invention;

[0024] Figure 6 This is a partial cross-sectional view of the fixing tube in this invention;

[0025] Figure 7 This is a schematic diagram of the structure of the second propulsion component in this invention;

[0026] Figure 8 for Figure 2 A magnified structural diagram of point A in the middle.

[0027] In the diagram: 101, base plate; 102, support frame; 103, second piston rod; 104, first piston; 105, motor assembly; 106, first cylinder liner; 107, second cylinder liner; 108, second piston; 109, connecting pipe; 110, feed pipe; 111, discharge pipe; 112, first solenoid valve; 113, first piston rod; 201, first support plate; 202, liquid storage tank; 203, connecting pipe; 204, guide... 205. Radiator; 206. Third piston; 301. Second support plate; 302. Fixing cylinder; 303. Fourth piston; 304. Sealing ring; 305. Extraction pipe; 306. Second solenoid valve; 401. Fixing plate; 402. Lifting module; 403. Lifting plate; 404. First spring telescopic rod; 501. Push plate; 502. T-shaped guide rod; 503. L-shaped frame; 504. Bracket; 505. 601. Connecting rod; 602. Mounting hole; 603. Rotating disk; 604. Moving rod; 605. Blade; 701. First mounting groove; 702. First ball nut; 703. First ball screw; 704. L-shaped block; 705. Second spring telescopic rod; 706. Mounting sleeve; 801. Fixed tube; 802. Moving tube; 803. L-shaped plate; 804. Second mounting groove; 805. Second ball nut; 806. Second ball screw 807. Lead screw; 808. Rotary joint; 809. Extrusion tube; 810. Third solenoid valve; 811. Rotating ring; 812. Return spring; 813. Spraying hole; 904. Fixed block; 905. Third spring telescopic rod; 906. Moving block; 907. Push rod; 908. Electromagnet; 909. Iron block; 1000. Disc; 1001. Connecting plate; 1002. Second connecting rod; 1003. U-shaped frame; 11. Conveying pipe. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-8 The present invention provides a flame retardant delivery pump technical solution: a flame retardant delivery pump includes a pump body; the pump body includes a pumping unit; the pumping unit includes a first cylinder liner 106, a first piston 104 disposed in the first cylinder liner 106 and a sealing chamber between the first piston 104 and the first cylinder liner 106, and the pump body also includes a pressure regulating device connected to the sealing chamber.

[0030] The pressure regulating device includes two first support plates 201, and a liquid storage cylinder 202 is fixedly connected to the side wall of the first support plate 201. The liquid storage cylinder 202 is filled with coolant and is connected to the sealed chamber through a connecting pipe 203. A third piston 206 is slidably connected inside the liquid storage cylinder 202 through a pushing mechanism. When the delivery pump is started intermittently, it can assist the movement of the first piston 104 to avoid excessive starting resistance from damaging the motor assembly 105 and ensuring the service life of the delivery pump. Multiple annular heat dissipation fins 205 are fixedly sleeved on the side wall of the liquid storage cylinder 202, which can make the cooling efficiency higher when the coolant circulates.

[0031] The delivery pump also includes a delivery pipe 11 and an extraction mechanism connected to the first cylinder liner 106. The extraction mechanism is used to extract the flame retardant remaining in the first cylinder liner 106 when the pump body stops. A flow rate sensor is provided on the side wall of the delivery pipe 11, which is a well-known technology in this field and will not be described in detail here.

[0032] The extraction mechanism includes two second support plates 301, and a fixed cylinder 302 is fixedly connected to the top of the second support plates 301. The fixed cylinder 302 is fixedly inserted into the side wall of the feed pipe 11, and a fourth piston 303 is slidably connected inside the fixed cylinder 302 through a lifting mechanism. A sealing ring 304 is fixedly connected to the bottom of the fourth piston 303, and the fixed cylinder 302 is connected to the first cylinder liner 106 through an extraction pipe 305. A second solenoid valve 306 is provided on the side wall of the extraction pipe 305. An agitation mechanism for agitating the flame retardant in the fixed cylinder 302 is provided on the top of the fourth piston 303. A retraction mechanism is provided on the side wall of the extraction pipe 305, and the retraction mechanism is used to retract the flame retardant in the fixed cylinder 302 back into the first cylinder liner 106 when the pump body is started. When the flow rate of the flame retardant in the feed pipe 11 is normal, the motor assembly 105 is stopped. At this time, it is driven by the lifting mechanism.

[0033] The pushing mechanism includes two T-shaped guide rods 502 fixedly connected to the side wall of the second support plate 301, and a pushing plate 501 is sleeved on the side wall of the T-shaped guide rods 502. An L-shaped frame 503 is fixedly connected to the bottom of the lifting plate 403, and a bracket 504 is fixedly connected to the top of the L-shaped frame 503. A first connecting rod 505 is rotatably connected to the side wall of the bracket 504, and the other end of the first connecting rod 505 is rotatably connected to the side wall of the pushing plate 501. A guide rod 204 is fixedly connected to the end of the third piston 206, and the end of the guide rod 204 away from the third piston 206 passes through the end of the liquid storage cylinder 202 and can abut against the pushing plate 501.

[0034] The lifting mechanism includes a fixed plate 401 fixedly connected to the side wall of the second support plate 301, and a lifting plate 403 is connected to the top of the fixed plate 401 through a lifting module 402. The fourth piston 303 is connected to the top of the lifting plate 403 through a first spring telescopic rod 404. The lifting module 402 is a well-known technology in this field and will not be described in detail here.

[0035] The agitation mechanism includes a mounting hole 601 on the top of the fourth piston 303, and a rotating disk 602 is rotatably connected in the mounting hole 601. A sealing gasket is provided on the side wall of the rotating disk 602 that mates with the mounting hole 601. A moving rod 603 is inserted into the top of the rotating disk 602, and multiple blades 604 are fixedly connected to the side wall of the moving rod 603. The rotating disk 602 is sleeved on the side wall of the blades 604, and a drive assembly for driving the rotating disk 602 to rotate is provided on the lifting plate 403.

[0036] The drive assembly includes a first mounting groove 701 formed on the lifting plate 403, and a first ball nut 702 is fixedly inserted into the first mounting groove 701. A first ball screw 703 is inserted into the first ball nut 702, and the upper end of the first ball screw 703 is fixed to the lower end of the moving rod 603. The ball nut and the ball screw are known technologies in this field and will not be described in detail here. An L-shaped block 704 is fixedly connected to the bottom of the lifting plate 403, and a second spring telescopic rod 705 is fixedly connected to the bottom of the L-shaped block 704. An mounting sleeve 706 is fixedly connected to the upper end of the second spring telescopic rod 705, and the lower end of the first ball screw 703 is rotatably connected to the inner wall of the mounting sleeve 706.

[0037] The extrusion mechanism includes a fixed tube 801 fixedly connected to the end of the first cylinder liner 106, and a movable tube 802 inserted inside the fixed tube 801. The side wall of the movable tube 802 has multiple injection holes 812. An extrusion tube 808 is fixedly connected to the side wall of the extraction tube 305, and a third solenoid valve 809 is provided on the side wall of the extrusion tube 808. An L-shaped plate 803 is fixedly connected to the end of the first cylinder liner 106, and a second mounting groove 804 is provided on the side wall of the L-shaped plate 803. A second ball nut 805 is fixedly inserted into the groove 804, and a hollow second ball screw 806 is inserted into the second ball nut 805. One end of the second ball screw 806 is fixedly inserted into the end of the moving tube 802, and the upper end of the extrusion tube 808 is connected to the second ball screw 806 through a rotary joint 807. A rotating ring 810 is rotatably connected to the side wall of the rotary joint 807, and the rotating ring 810 is fixed to the side wall of the L-shaped plate 803 through a return spring 811.

[0038] The delivery pump also includes a base plate 101, a support frame 102, a motor assembly 105, and a second cylinder liner 107, which are well-known technologies in this field and will not be described in detail here. The support frame 102 is fixed to the top of the base plate 101, the motor assembly 105 is fixed to the top of the support frame 102, the first support plate 201 and the second support plate 301 are fixed to the top of the base plate 101, and the volume of the first cylinder liner 106 is twice the volume of the second cylinder liner 107. A second piston 108 is slidably connected inside the second cylinder liner 107. The first cylinder liner 106 is connected to the delivery pipe 11 through the feed pipe 110, and a first check valve is provided inside the feed pipe 110. The conduction direction of the first check valve is from the delivery pipe 11 to the first cylinder liner 106. The second cylinder liner 107 is connected to the second cylinder liner 107 through the connecting pipe 109. The first cylinder liner 106 is connected, and the surface of the feed pipe 11 and connecting pipe 109 can be provided with a heat insulation layer to reduce the possibility of flame retardant solidification. A second one-way valve is provided in the connecting pipe 109. The conduction direction of the second one-way valve is from the first cylinder liner 106 to the second cylinder liner 107. The second cylinder liner 107 is connected to the feed pipe 11 through the discharge pipe 111. A third one-way valve is provided in the discharge pipe 111. The conduction direction of the third one-way valve is from the second cylinder liner 107 to the discharge pipe 111. A first solenoid valve 112 is provided on the side wall of the feed pipe 110, connecting pipe 109 and discharge pipe 111. A first push assembly is provided at the output end of the motor assembly 105. The first push assembly is used to push the first piston 104 and the second piston 108 to reciprocate.

[0039] The first actuation assembly includes a disk 1001 fixedly connected to the output end of the motor assembly 105, and a connecting plate 1002 fixedly connected to the side wall of the disk 1001. A first piston rod 113 is inserted into the end of the first cylinder liner 106, and one end of the first piston rod 113 is fixed to the first piston 104. A second piston rod 103 is inserted into the end of the second cylinder liner 107, and one end of the second piston rod 103 is fixed to the second piston 108. A second connecting rod 1003 is rotatably connected to the side wall of the connecting plate 1002, and the other end of the second connecting rod 1003 is rotatably connected to the end of the first piston rod 113 away from the first piston 104. The second piston rod 103 is fixed to the first piston rod 113 through a U-shaped bracket 1004.

[0040] A second pushing assembly is provided at the bottom of the first cylinder liner 106. The second pushing assembly is used to reset the first piston 104 when the pump body stops. The second pushing assembly includes a fixed block 901 fixedly connected to the bottom of the first cylinder liner 106. A moving block 903 is connected to the side wall of the fixed block 901 through a third spring telescopic rod 902. A pushing rod 904 is fixedly connected to the side wall of the moving block 903 and passes through the side wall of the fixed block 901. An electromagnet 905 is fixedly connected to the side wall of the fixed block 901. An iron block 906 is fixedly connected to the side wall of the moving block 903 opposite to the electromagnet 905.

[0041] Working principle: During use, the flame retardant is conveyed through the conveying pipe 11 and passes through the inside of the fixed cylinder 302. When the conveying pump is started, the lifting module 402 drives the lifting plate 403 to move upward. At the same time, the L-shaped frame 503 drives the support 504 to move upward. At this time, the first connecting rod 505 can be driven to rotate gradually and push the push plate 501 to move away from the second support plate 301. When the push plate 501 abuts against the end of the guide rod 204, it can push the third piston 206 to move. At this time, the coolant in the liquid storage cylinder 202 can be squeezed and enter the sealing chamber of the first cylinder liner 106 through the connecting pipe 203. Under the action of hydraulic pressure, the first piston 104 can be pushed to move.

[0042] At the same time, the starter motor assembly 105 drives the disc 1001 to rotate. When the disc 1001 rotates, it drives the second connecting rod 1003 to rotate through the connecting plate 1002, and pushes the first piston rod 113 to move. Simultaneously, the U-shaped frame 1004 and the second piston rod 103 drive the second piston 108 to move. This assists the movement of the first piston 104 when the pump starts. When the pump starts intermittently, the resistance of the first piston 104 due to the viscous material in the first cylinder liner 106 is large, and the lack of inertial force results in high starting resistance, thus avoiding damage to the motor assembly 105 and ensuring the service life of the pump.

[0043] Meanwhile, when the lifting plate 403 moves upward, it can drive the fourth piston 303 to move upward through the first spring telescopic rod 404. At this time, the flame retardant in the fixed cylinder 302 can be squeezed. At the same time, the connection between the conveying pipe 11 and the fixed cylinder 302 can be sealed by the sealing ring 304. Furthermore, the first spring telescopic rod 404 is gradually compressed, which can pressurize the flame retardant. At this time, the distance between the lifting plate 403 and the fourth piston 303 gradually decreases. When the lifting plate 403 moves upward, it can drive the first ball screw 703 to move upward through the L-shaped block 704, the second spring telescopic rod 705 and the mounting sleeve 706, and drive the moving rod 603 and the blade 604 to move upward along the rotating disk 602.

[0044] When the upper end of the moving rod 603 abuts against the top of the fixed cylinder 302, the first ball screw 703 stops moving upward. At this time, when the lifting plate 403 continues to move upward, the second spring telescopic rod 705 is gradually compressed, and the first ball nut 702 is driven to move upward along the side wall of the first ball screw 703, thereby driving the first ball screw 703 to rotate, and driving the moving rod 603 and the blade 604 to rotate, thereby agitating the flame retardant in the fourth piston 303. At the same time, the rotating disk 602 rotates in the mounting hole 601.

[0045] Next, the third solenoid valve 809 is opened. At this time, the flame retardant squeezed and agitated in the fixed cylinder 302 can enter the moving tube 802 through the return tube 808, the rotary joint 807, and the second ball screw 806. Under pressure, the moving tube 802 extends into the first cylinder liner 106. At the same time, the return spring 811 is compressed. When the moving tube 802 moves, it can drive the second ball screw 806 to move in the second ball nut 805, thereby causing the second ball screw 806 to rotate, which in turn drives the moving tube 802 to rotate, causing the flame retardant to be sprayed on the inner wall of the first cylinder liner 106. This makes the flame retardant entering the first cylinder liner 106 more uniform and can also have a rinsing and cleaning effect on its inner wall.

[0046] After the spraying is completed, the moving tube 802 can move into the fixed tube 801 under the action of the return spring 811 and reset, so that the end of the moving tube 802 is flush with the end of the first cylinder liner 106 and forms a sealing effect, which can prevent dry friction when the first piston 104 moves, and at the same time, prevent discontinuous material conveying. Furthermore, the push plate 501 can be moved and reset along the side wall of the T-shaped guide rod 502 and disengaged from the guide rod 204 by the L-shaped frame 503, the bracket 504 and the first connecting rod 505, ensuring that the third piston 206 and the guide rod 204 can move normally when the conveying pump is working normally.

[0047] After the motor assembly 105 starts, it can drive the first piston 104 to reciprocate within the first cylinder liner 106. When the first piston 104 moves away from the fixed pipe 801, it can squeeze the coolant in the first cylinder liner 106 back into the reservoir 202 through the connecting pipe 203. At the same time, it pushes the third piston 206 to move. When the first piston 104 moves closer to the fixed pipe 801, it can draw the coolant in the reservoir 202 into the first cylinder liner 106 through the connecting pipe 203, thereby circulating the coolant in the first cylinder liner 106. This can lubricate and cool the first cylinder liner 106 and the first piston 104, ensuring their service life.

[0048] Furthermore, upon startup, the first solenoid valve 112 is opened. When the first piston 104 moves towards the fixed tube 801, it can drive the second piston 108 to move synchronously via the first piston rod 113, the U-shaped bracket 1004, and the second piston rod 103. At this time, the flame retardant in the first cylinder liner 106 is squeezed and enters the second cylinder liner 107 through the connecting tube 109. Moreover, the volume of the first cylinder liner 106 is twice the volume of the second cylinder liner 107, making the second cylinder liner 107... While the chamber is filled with flame retardant, excess flame retardant can be conveyed into the conveying pipe 11 through the discharge pipe 111. When the first piston 104 moves away from the fixed pipe 801, the material in the conveying pipe 11 can be drawn into the first cylinder liner 106 through the feed pipe 110. At the same time, the second piston 108 squeezes the flame retardant in the second cylinder liner 107 and conveys it into the conveying pipe 11 through the discharge pipe 111, thereby enabling continuous and more uniform delivery of the flame retardant.

[0049] When the flow rate of the flame retardant in the feed pipe 11 is normal, the motor assembly 105 is stopped. At this time, the first solenoid valve 112 is closed, and the lifting plate 403 is moved downward by the lifting module 402. The fourth piston 303 is moved downward by the first spring telescopic rod 404. At the same time, the second solenoid valve 306 and the third solenoid valve 809 are opened. At this time, the flame retardant in the first cylinder liner 106 and the moving pipe 802 can be drawn into the fixed cylinder 302. When the sealing ring 304 moves to the bottom of the feed pipe 11, the flame retardant in the feed pipe 11 can be normally conveyed through the fixed cylinder 302. When the motor assembly 105 is stopped, the flame retardant in the first cylinder liner 106 is discharged, which can play a protective role.

[0050] Furthermore, after each pump stop, the electromagnet 905 can be energized. When the electromagnet 905 is energized, it attracts the iron block 906, thereby driving the moving block 903 to move. At the same time, the third spring telescopic rod 902 is compressed, which drives the push rod 904 to move, so that the push rod 904 can abut against the U-shaped frame 1004. Then, the first piston rod 113 drives the first piston 104 to move and reset, ensuring that the initial position of the first piston 104 is in contact with the end of the first cylinder liner 106 away from the fixed tube 801.

Claims

1. A flame retardant delivery pump, comprising a pump body; the pump body comprising a pumping unit; the pumping unit comprising a first cylinder liner (106), a first piston (104) disposed within the first cylinder liner (106), and a sealed chamber located between the first piston (104) and the first cylinder liner (106), characterized in that: The pump body also includes a pressure regulating device connected to the sealing chamber; The pressure regulating device includes two first support plates (201), and a liquid storage cylinder (202) is fixedly connected to the side wall of the first support plate (201). The liquid storage cylinder (202) is filled with coolant, and the liquid storage cylinder (202) is connected to the sealed chamber through a connecting pipe (203). A third piston (206) is slidably connected inside the liquid storage cylinder (202) through a pushing mechanism. The delivery pump also includes a delivery pipe (11) and an extraction mechanism connected to the first cylinder liner (106), and the extraction mechanism is used to extract the flame retardant remaining in the first cylinder liner (106) when the pump body stops. The extraction mechanism includes two second support plates (301), and a fixed cylinder (302) is fixedly connected to the top of the second support plate (301). The fixed cylinder (302) is fixedly inserted into the side wall of the conveying pipe (11), and a fourth piston (303) is slidably connected inside the fixed cylinder (302) through a lifting mechanism. A sealing ring (304) is fixedly connected to the bottom of the fourth piston (303), and the fixed cylinder (302) is connected to the first cylinder liner (106) through the extraction pipe (305). A second solenoid valve (306) is provided on the side wall of the extraction pipe (305). The top of the fourth piston (303) is provided with an agitation mechanism for agitating the flame retardant in the fixed cylinder (302), and the side wall of the extraction tube (305) is provided with a push-back mechanism, which is used to push the flame retardant in the fixed cylinder (302) back into the first cylinder liner (106) when the pump body is started. The lifting mechanism includes a fixed plate (401) fixedly connected to the side wall of the second support plate (301), and the top of the fixed plate (401) is connected to a lifting plate (403) via a lifting module (402), and the fourth piston (303) is connected to the top of the lifting plate (403) via a first spring telescopic rod (404). The pushing mechanism includes two T-shaped guide rods (502) fixedly connected to the side wall of the second support plate (301), and a pushing plate (501) is sleeved on the side wall of the T-shaped guide rods (502). An L-shaped frame (503) is fixedly connected to the bottom of the lifting plate (403), and a bracket (504) is fixedly connected to the top of the L-shaped frame (503). A first connecting rod (505) is rotatably connected to the side wall of the bracket (504), and the other end of the first connecting rod (505) is rotatably connected to the side wall of the pushing plate (501). A guide rod (204) is fixedly connected to the end of the third piston (206), and the end of the guide rod (204) away from the third piston (206) passes through the end of the liquid storage cylinder (202) and can abut against the pushing plate (501). The stirring mechanism includes a mounting hole (601) on the top of the fourth piston (303), and a rotating disk (602) is rotatably connected in the mounting hole (601). A moving rod (603) is inserted into the top of the rotating disk (602), and multiple blades (604) are fixedly connected to the side wall of the moving rod (603). The rotating disk (602) is sleeved on the side wall of the blades (604), and a driving assembly for driving the rotating disk (602) to rotate is provided on the lifting plate (403).

2. The flame retardant delivery pump according to claim 1, characterized in that: The drive assembly includes a first mounting groove (701) formed on the lifting plate (403), and a first ball nut (702) is fixedly inserted in the first mounting groove (701). A first ball screw (703) is inserted in the first ball nut (702), and the upper end of the first ball screw (703) is fixed to the lower end of the moving rod (603). An L-shaped block (704) is fixedly connected to the bottom of the lifting plate (403), and a second spring telescopic rod (705) is fixedly connected to the bottom of the L-shaped block (704). An mounting sleeve (706) is fixedly connected to the upper end of the second spring telescopic rod (705), and the lower end of the first ball screw (703) is rotatably connected to the inner wall of the mounting sleeve (706).

3. The flame retardant delivery pump according to claim 1, characterized in that: The extrusion mechanism includes a fixed tube (801) fixedly connected to the end of the first cylinder liner (106), and a movable tube (802) inserted inside the fixed tube (801). The movable tube (802) has multiple spray holes (812) on its sidewall. An extrusion tube (808) is fixedly connected to the sidewall of the extraction tube (305), and a third solenoid valve (809) is provided on the sidewall of the extrusion tube (808). An L-shaped plate (803) is fixedly connected to the end of the first cylinder liner (106), and a second mounting groove (804) is provided on the sidewall of the L-shaped plate (803). A second ball nut (805) is fixedly inserted in the mounting groove (804), and a hollow second ball screw (806) is inserted in the second ball nut (805). One end of the second ball screw (806) is fixedly inserted into the end of the moving tube (802), and the upper end of the extrusion tube (808) is connected to the second ball screw (806) through a rotary joint (807). A rotating ring (810) is rotatably connected to the side wall of the rotary joint (807), and the rotating ring (810) is fixed to the side wall of the L-shaped plate (803) through a return spring (811).

4. The flame retardant delivery pump according to claim 1, characterized in that: The pump also includes a base plate (101), a support frame (102), a motor assembly (105), and a second cylinder liner (107). The support frame (102) is fixed to the top of the base plate (101), the motor assembly (105) is fixed to the top of the support frame (102), the first support plate (201) and the second support plate (301) are fixed to the top of the base plate (101), and the volume of the first cylinder liner (106) is twice the volume of the second cylinder liner (107). A second piston (108) is slidably connected inside the second cylinder liner (107). The first cylinder liner (106) is connected to the feed pipe (11) through the feed pipe (110), and the feed pipe (110) is connected to the feed pipe (107). 10) A first check valve is provided inside. The second cylinder liner (107) is connected to the first cylinder liner (106) through the connecting pipe (109). A second check valve is provided inside the connecting pipe (109). The second cylinder liner (107) is connected to the conveying pipe (11) through the discharge pipe (111). A third check valve is provided inside the discharge pipe (111). A first solenoid valve (112) is provided on the side wall of the feed pipe (110), the connecting pipe (109) and the discharge pipe (111). A first push assembly is provided at the output end of the motor assembly (105). The first push assembly is used to push the first piston (104) and the second piston (108) to reciprocate.

5. A flame retardant delivery pump according to claim 4, characterized in that: The first push assembly includes a disc (1001) fixedly connected to the output end of the motor assembly (105), and a connecting plate (1002) fixedly connected to the side wall of the disc (1001). A first piston rod (113) is inserted into the end of the first cylinder liner (106), and one end of the first piston rod (113) is fixed to the first piston (104). A second piston rod (103) is inserted into the end of the second cylinder liner (107), and one end of the second piston rod (103) is fixed to the second piston (108). A second connecting rod (1003) is rotatably connected to the side wall of the connecting plate (1002), and the other end of the second connecting rod (1003) is rotatably connected to the end of the first piston rod (113) away from the first piston (104). The second piston rod (103) is fixed to the first piston rod (113) through a U-shaped frame (1004).

6. The flame retardant delivery pump according to claim 1, characterized in that: The bottom of the first cylinder liner (106) is provided with a second push assembly, which is used to reset the first piston (104) when the pump body stops. The second push assembly includes a fixed block (901) fixedly connected to the bottom of the first cylinder liner (106), and a moving block (903) is connected to the side wall of the fixed block (901) through a third spring telescopic rod (902). A push rod (904) is fixedly connected to the side wall of the moving block (903), and the push rod (904) passes through the side wall of the fixed block (901). An electromagnet (905) is fixedly connected to the side wall of the fixed block (901), and an iron block (906) is fixedly connected to the side wall of the moving block (903) opposite to the electromagnet (905).

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