Piston rubber cylinder pump for emulsion explosive production line

Abstract

The utility model discloses a piston type emulsion electric cylinder pump for emulsion explosive production line, including motor, gear set, double piston cylinder and first connecting rod and second connecting rod. Gear set includes same number of teeth driving gear and driven gear, and motor drives driving gear. Double piston cylinder includes parallel first piston cylinder and second piston cylinder, and both share input pipe and output pipe. First connecting rod articulates piston rod of first piston cylinder and driving gear, and second connecting rod articulates piston rod of second piston cylinder and driven gear. The key is that the articulation point of first connecting rod and driving wheel and the articulation point of second connecting rod and driven wheel are different by half a circle (180 DEG). The utility model provides a piston type emulsion electric cylinder pump for emulsion explosive production line, replaces 0 type equipment through adopting piston type electric cylinder pump, reduces the risk, and through the design of 180 DEG heterophase drive of double cylinder, makes two piston cylinders alternate discharge, ensures that the flow is continuous and stable, eliminates the pulsation, and is applicable to emulsion explosive production line.

Description

Technical Field

[0001] This utility model relates to the technical field of emulsion explosive production equipment, and in particular to a piston-type latex electric cylinder pump for an emulsion explosive production line. Background Technology

[0002] In the production process of emulsion explosives, it is necessary to accurately and stably transport high-viscosity and potentially hazardous materials such as latex matrix from the raw material tank to the emulsifier or subsequent processes.

[0003] Currently, screw pumps or rubber-coated rotor pumps are commonly used on production lines to perform this conveying task. However, due to their structural characteristics and operating environment, these pumps may be classified as Class 0 equipment (i.e., locations where explosive gas atmospheres are continuously present or exist for extended periods) when conveying latex matrices. Using Class 0 equipment in production environments with high explosion-proof requirements, such as those for emulsion explosives, poses significant safety hazards and explosion risks, and does not comply with increasingly stringent safety production standards.

[0004] To mitigate these risks, some technicians have attempted to use piston pumps. However, the structure of traditional single-cylinder piston pumps dictates that during the reciprocating motion of the piston rod, both suction and discharge cease simultaneously. This results in momentary interruptions or severe fluctuations in the material flow and pressure in the output pipeline, a phenomenon known as "pulsation." This pulsation has a significant adverse impact on emulsion explosive production lines that require highly stable flow rates to ensure emulsification quality and smooth operation of subsequent processes.

[0005] Therefore, developing a pumping device that can meet high explosion-proof safety requirements (non-Class 0 equipment) and provide continuous, stable, and pulsation-free flow is a technical problem that needs to be solved in this field. Utility Model Content

[0006] The purpose of this invention is to provide a piston-type latex electric cylinder pump for emulsion explosive production lines, which solves the problem of high explosion risk of existing pump equipment (such as screw pumps) as Class 0 equipment, and at the same time solves the problem of flow and pressure pulsation in traditional single-cylinder piston pumps when conveying materials, so as to achieve safe, stable and continuous material conveying.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a piston-type latex electric cylinder pump for an emulsion explosive production line, the piston-type latex electric cylinder pump for the emulsion explosive production line comprising: Electric motor; The gear set includes a driving gear and a driven gear that mesh with each other and have the same number of teeth. The driving gear and the driven gear are rotatably mounted on the gearbox via a shaft and a bearing, respectively. The driving gear is connected to the motor power shaft. A dual piston cylinder comprises a first piston cylinder and a second piston cylinder arranged in parallel. The first piston cylinder and the second piston cylinder have the same structure. The first piston cylinder includes a cylinder body, a piston rod, and two one-way valves. The cylinder body includes a chamber and an inlet and an outlet disposed on both sides of the chamber. The piston rod is slidably fitted within the chamber of the cylinder body. The two one-way valves are respectively disposed on the inlet and the outlet. The inlet of the first piston cylinder and the second piston cylinder are connected to the same inlet pipe, and the outlet of the first piston cylinder and the second piston cylinder are connected to the same outlet pipe. A first connecting rod and a second connecting rod, wherein one end of the first connecting rod is hinged to the piston rod of the first piston cylinder, and the other end of the first connecting rod is hinged to the driving gear; one end of the second connecting rod is hinged to the piston rod of the second piston cylinder, and the other end of the first connecting rod is hinged to the driven gear; The hinge point between the first connecting rod and the driving wheel is half a turn away from the hinge point between the second connecting rod and the driven wheel.

[0008] In one embodiment, the motor is an explosion-proof servo motor.

[0009] In one embodiment, the check valve is a large-channel ball valve.

[0010] In one embodiment, a pressure gauge is installed on the output pipe.

[0011] In one embodiment, the device further includes an electronic flow meter and a PLC module. The electronic flow meter is mounted on the output pipe, and the PLC module is mounted in the main circuit of the motor. The signal input port of the PLC module is connected to the signal output port of the electronic flow meter via a wire.

[0012] The above-described technical solutions in the embodiments of this utility model have at least the following technical effects or advantages: The piston-type latex electric cylinder pump for emulsion explosive production lines provided in this embodiment replaces traditional screw pumps and rubber-coated rotor pumps. The electric cylinder pump structure is not classified as Class 0 equipment, eliminating Class 0 equipment from the entire production line (the piston-type latex electric cylinder pump avoids the shearing and friction caused by the high-speed rotation of screw pumps, which is crucial for handling sensitive emulsion explosive matrices and effectively reduces the possibility of accidents caused by frictional heat generation), thereby reducing safety hazards in this process, minimizing the risk of explosion, and improving the safety of emulsion explosive production.

[0013] Furthermore, this invention employs a double-piston cylinder structure, with two piston cylinders driven by a driving gear and a driven gear of the same number of teeth, respectively. The hinge points of the two connecting rods on the gears differ by half a turn (180°). This ensures that when the motor rotates, the two piston cylinders are always in opposite motion states: when the first piston cylinder is in the discharge stroke, the second piston cylinder is in the suction stroke; when the first piston cylinder reverses direction to begin suction, the second piston cylinder reverses direction to begin discharge. The two piston cylinders alternately pump material to the same output pipe, ensuring a continuous and stable total output flow rate, effectively solving the pulsation problem of single-cylinder piston pumps, and guaranteeing the stability of subsequent processes. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of the structure of a piston-type latex electric cylinder pump for an emulsion explosive production line provided in this embodiment of the utility model; Figure 2 A schematic diagram of the structure of the piston-type latex electric cylinder pump for an emulsion explosive production line after removing the gearbox, as provided in this embodiment of the utility model. Figure 3 A schematic diagram of the internal structure of the first piston cylinder provided in an embodiment of this utility model.

[0016] The labels for the various figures are as follows: 1. Motor; 2. Gear set; 3. Double piston cylinder; 4. First connecting rod; 5. Second connecting rod; 6. Input pipe; 7. Output pipe; 8. Pressure gauge; 9. Electronic flow meter; 10. PLC module; 11. Spring; 12. Sealing ball; 21. Drive gear; 22. Driven gear; 23. Gearbox; 31. First piston cylinder; 32. Second piston cylinder; 311. Cylinder body; 312. Piston rod; 313. Check valve. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Please see Figures 1 to 3 This application provides a piston-type latex electric cylinder pump for an emulsion explosive production line, including a motor 1, a gear set 2, a double piston cylinder 3, a first connecting rod 4, and a second connecting rod 5.

[0022] Motor 1 serves as the power source. In this embodiment, to improve safety and control accuracy, an explosion-proof servo motor 1 is preferably used. The power output shaft of motor 1 is connected to gear set 2.

[0023] Gear set 2 is installed inside gearbox 23 and includes a driving gear 21 and a driven gear 22. The driving gear 21 and the driven gear 22 mesh with each other and have the same number of teeth. The driving gear 21 is rigidly connected to the power shaft of motor 1, and the driven gear 22 is rotatably mounted on gearbox 23 via a shaft and bearing (not shown in the figure).

[0024] The double piston cylinder 3 includes two parallel, identically structured first piston cylinders 31 and second piston cylinders 32. Taking the first piston cylinder 31 as an example, it includes a cylinder body 311, a piston rod 312, and two one-way valves 313 (one-way valve 313 at the inlet and one-way valve 313 at the outlet). The cylinder body 311 has a chamber for receiving materials, with an inlet and an outlet respectively located on both sides of the chamber. One end of the piston rod 312 contains a piston, which slides within the chamber.

[0025] Two one-way valves 313 are respectively installed at the inlet and outlet. These two one-way valves 313 ensure that material can only flow into the chamber from the inlet and only flow out of the chamber from the outlet. To accommodate the high viscosity of the latex matrix, a large-channel ball valve is preferably used as the one-way valve 313 in this embodiment to prevent clogging.

[0026] The specific structure of the one-way valve 313 is as follows: Figure 3 As shown, the valve includes a spring 11 and a sealing ball 12. Both the spring 11 and the sealing ball 12 are disposed inside the valve cavity of the one-way valve 313. One end of the spring 11 abuts against the inner wall of the valve cavity, and the other end of the spring 11 is connected to the sealing ball 12.

[0027] During the suction stroke, the piston rod 312 moves upward, the volume of the chamber in the cylinder 311 increases, generating negative pressure. At this time, under the action of negative pressure, the sealing ball 12 of the right-side check valve 313 overcomes the elastic force of the spring 11 and moves towards the cylinder 311, allowing the material to enter the chamber of the cylinder 311 through the check valve 313 for suction. At the same time, under the action of negative pressure and the elastic force of the spring 11, the sealing ball 12 of the left-side check valve 313 tightly seals the passage, thus closing the check valve 313.

[0028] Conversely, during the discharge stroke, the piston rod 312 moves downward, the volume of the chamber in the cylinder 311 decreases, and the internal pressure increases. At this time, the sealing ball 12 in the left check valve 313 overcomes the spring force of the spring 11 under the action of the chamber pressure, causing the sealing ball 12 to move away from the cylinder 311, thereby causing the sealing ball 12 to open the channel, and the material in the cylinder 311 can be discharged into the output pipe 7 through the left check valve 313. At this time, under the action of the spring 11 and the chamber pressure, the sealing ball 12 of the right check valve 313 tightly seals the channel, so that the check valve 313 is closed.

[0029] The input ports of the first piston cylinder 31 and the second piston cylinder 32 are connected to a common input pipe 6, and their output ports are connected to a common output pipe 7.

[0030] One end of the first connecting rod 4 is hinged to the end of the piston rod 312 of the first piston cylinder 31, and the other end is hinged to a specific position on the gear plate surface of the driving gear 21. One end of the second connecting rod 5 is hinged to the end of the piston rod 312 of the second piston cylinder 32, and the other end is hinged to a specific position on the gear plate surface of the driven gear 22. This structure converts the rotational motion of the gears into the reciprocating linear motion of the piston rod 312. Furthermore, the hinge point between the first connecting rod 4 and the driving gear 21, and the hinge point between the second connecting rod 5 and the driven gear 22, are 180° out of phase in rotation.

[0031] The working process of this utility model is as follows: When motor 1 starts, it drives the drive gear 21 to rotate. Since the drive gear 21 and the driven gear 22 have the same number of teeth and mesh with each other, the driven gear 22 rotates at the same speed as the drive gear 21 but in the opposite direction.

[0032] The driving gear 21 drives the first piston rod 312 to reciprocate linearly via the first connecting rod 4; the driven gear 22 drives the second piston rod 312 to reciprocate linearly via the second connecting rod 5.

[0033] Since the two hinge points are 180° apart, when the driving gear 21 rotates and pushes the first piston rod 312 into the cylinder 311 through the first connecting rod 4 (discharge stroke), the driven gear 22 (rotates in the opposite direction) just pulls the second piston rod 312 out of the cylinder 311 through the second connecting rod 5 (suction stroke).

[0034] During the discharge stroke of the first piston cylinder 31, the chamber volume decreases and the material pressure increases, opening the one-way valve 313 at the output port, and the material is pumped from the output port into the output pipe 7; at this time, the one-way valve 313 at the input port closes under pressure.

[0035] During the suction stroke of the second piston cylinder 32, the chamber volume increases, creating a negative pressure. The material flows from the input pipe 6, opening the one-way valve 313 at the input port and flowing into the chamber. At this time, the one-way valve 313 at the output port closes under the pressure of the output pipe 7.

[0036] When gear set 2 continues to rotate half a turn, the first piston cylinder 31 switches to the suction stroke, and the second piston cylinder 32 switches to the discharge stroke.

[0037] This cycle repeats continuously, with the two parallel piston cylinders alternating to discharge material, ensuring that material is constantly pumped out of the main output pipe 7. This effectively eliminates the flow pulsation of a single-cylinder pump and achieves stable and continuous material conveying.

[0038] To achieve better control, a pressure gauge 8 is installed on the output pipe 7 in this embodiment for real-time monitoring of pipeline pressure. An electronic flow meter 9 and a PLC module 10 are also included. The electronic flow meter 9 is installed on the output pipe 77 to monitor the output flow rate in real time. The PLC module 10 is located in the main circuit of the motor 1 (explosion-proof servo motor 1) and receives the signal output from the electronic flow meter 9. The PLC module 10 compares the preset flow rate value with the measured flow rate value fed back by the electronic flow meter 9, and adjusts the speed of the servo motor 1 in real time through control logic such as PID algorithms, thereby precisely controlling the reciprocating frequency of the two piston rods 312 and achieving closed-loop automatic control of the output flow rate.

[0039] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements 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 piston-type latex electric cylinder pump for an emulsion explosive production line, characterized in that, The piston-type latex electric cylinder pump used in the emulsion explosive production line includes: Electric motor; The gear set includes a driving gear and a driven gear that mesh with each other and have the same number of teeth. The driving gear and the driven gear are rotatably mounted on the gearbox via a shaft and a bearing, respectively. The driving gear is connected to the motor power shaft. A dual piston cylinder comprises a first piston cylinder and a second piston cylinder arranged in parallel. The first piston cylinder and the second piston cylinder have the same structure. The first piston cylinder includes a cylinder body, a piston rod, and two one-way valves. The cylinder body includes a chamber and an inlet and an outlet disposed on both sides of the chamber. The piston rod is slidably fitted within the chamber of the cylinder body. The two one-way valves are respectively disposed on the inlet and the outlet. The inlet of the first piston cylinder and the second piston cylinder are connected to the same inlet pipe, and the outlet of the first piston cylinder and the second piston cylinder are connected to the same outlet pipe. A first connecting rod and a second connecting rod, wherein one end of the first connecting rod is hinged to the piston rod of the first piston cylinder, and the other end of the first connecting rod is hinged to the driving gear; one end of the second connecting rod is hinged to the piston rod of the second piston cylinder, and the other end of the first connecting rod is hinged to the driven gear; The hinge point between the first connecting rod and the driving gear is half a turn away from the hinge point between the second connecting rod and the driven gear.

2. The piston-type latex electric cylinder pump for an emulsion explosive production line according to claim 1, characterized in that: The motor is an explosion-proof servo motor.

3. The piston-type latex electric cylinder pump for an emulsion explosive production line according to claim 1, characterized in that: The one-way valve is a large-channel ball valve.

4. The piston-type latex electric cylinder pump for an emulsion explosive production line according to claim 1, characterized in that: A pressure gauge is installed on the output pipe.

5. The piston-type latex electric cylinder pump for an emulsion explosive production line according to claim 1, characterized in that: It also includes an electronic flow meter and a PLC module. The electronic flow meter is installed on the output pipe, and the PLC module is installed in the main circuit of the motor. The signal input port of the PLC module is connected to the signal output port of the electronic flow meter through a wire.

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