Balancing system of transfer pump

Abstract

The utility model discloses a transfer pump balancing system, including a plurality of positive displacement pumps, driving mechanism and at least one valve assembly, each positive displacement pump includes a pump body and a piston assembly, the pump body is provided with a pump cavity, a feed port and a first discharge port, the feed port and the first discharge port are communicated with the pump cavity, and the piston assembly is installed in the pump cavity in a reciprocating motion mode so as to change the working volume of the pump cavity. At least one positive displacement pump is also provided with a second discharge hole communicated with the pump cavity; a driving part of the driving mechanism is connected with the plurality of piston assemblies; and the valve assembly corresponds to the second discharge port, is arranged at the second discharge port, and is used for controlling the opening and closing of the second discharge port. The discharging amount of the first discharging opening is achieved by controlling the valve assembly, materials in different raw material barrels can be extracted in an equal-mass mode, variable-ratio feeding can be achieved, in other words, feeding at any mass ratio can be achieved, and feeding balance is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of material pumps, in particular to a material pump balancing system. Background Art

[0002] A pump is a machine that transports fluids or pressurizes fluids. It transfers the mechanical energy of the prime mover or other external energy to the liquid, increasing the energy of the liquid. Pumps are mainly used to transport liquids such as water, oil, acid and alkali liquids, emulsions, suspensions and liquid metals. They can also transport liquid-gas mixtures and liquids containing suspended solids. They are widely used in production and life.

[0003] CN105464951A A high-efficiency piston pump body, including a pump body with an intake valve and an exhaust valve, wherein a pump chamber connected to the outside through the intake valve or the exhaust valve is formed in the pump body, and a piston is provided in the pump body for reciprocating movement to cause periodic changes in the working volume of the pump chamber, the pump body is made of non-magnetic material, the intake valve and the exhaust valve are both made of magnetic material and the magnetism formed by the two is opposite, and an electromagnetic induction coil connected to a variable frequency power supply is embedded in the piston, and the electromagnetic induction coil produces periodic magnetic changes under the action of the variable frequency power supply.

[0004] However, in the above-mentioned prior art, when the displacement pump simultaneously pumps two different materials, the material discharge amounts of the two pumps are different due to the different viscosities and specific gravities of the materials. Utility Model Content

[0005] The purpose of the utility model is to overcome the above technical deficiencies and propose a material pump balancing system to solve the technical problem in the prior art that when a positive displacement pump simultaneously pumps two different materials, the viscosity and specific gravity of the materials are different, resulting in different discharge volumes of the two pumps.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a material pump balancing system, comprising:

[0008] A plurality of displacement pumps, each of which comprises a pump body and a piston assembly, wherein the pump body is provided with a pump cavity, a feed port connected to the pump cavity, and a first discharge port, and the piston assembly is reciprocatingly mounted in the pump cavity so that the working volume of the pump cavity changes, wherein at least one of the displacement pumps is further provided with a second discharge port connected to the pump cavity;

[0009] a driving mechanism connected to the plurality of piston assemblies; and

[0010] At least one valve component corresponds to the second discharge port, the valve component is arranged at the second discharge port, and the valve component is used to control the opening and closing of the second discharge port so that the discharge mass ratio of multiple first discharge ports reaches a preset value.

[0011] In some embodiments, the valve assembly includes a valve body, a blocking part and a driving assembly. The valve body is installed on the pump body. The valve body is provided with a channel, one end of the channel is connected to the second discharge port, and the blocking part is movably installed in the channel to have a blocked state for blocking the channel and an open state for opening the channel. The driving assembly is connected to the blocking part to drive the blocking part to move.

[0012] In some embodiments, the channel includes a first channel and a second channel connected in sequence, the diameter of the first channel is larger than the diameter of the second channel, so that a step is formed at the connection between the first channel and the second channel, the blocking member is movably installed in the first channel, and the diameter of the blocking member is larger than the second channel and smaller than the first channel, so that when the blocking member abuts against the step, it is in the blocking state.

[0013] In some embodiments, the valve assembly further includes a reflux pipe and a flow valve, the reflux pipe is connected to the other end of the channel, and the flow valve is disposed on the reflux pipe.

[0014] In some embodiments, the driving assembly includes a driving cylinder, the driving cylinder is mounted on the valve body, and a push rod of the driving cylinder extends into the channel and is connected to the blocking member.

[0015] In some embodiments, the valve body and the pump body are detachably connected.

[0016] In some embodiments, the pump chamber includes a first cavity, a second cavity, and a third cavity arranged in sequence, the first cavity and the second cavity are connected through a first one-way valve, the second cavity and the third cavity are connected through a second one-way valve, the first discharge port and the second discharge port are connected to the first cavity, and the lower end opening of the third cavity is arranged to form the feed port.

[0017] In some embodiments, the piston assembly includes a connecting shaft and a piston, and the connecting shaft is movably inserted in the first cavity, the second cavity and the third cavity along its axial direction, and the diameters of the connecting shaft located in the first cavity, the second cavity, and the three cavities are different, and the piston is installed at one end of the connecting shaft located in the third cavity.

[0018] In some embodiments, the connecting shaft includes a first connecting shaft and a second connecting shaft connected in sequence, the first connecting shaft is located in the first cavity and the second cavity, the second connecting shaft is located in the third cavity, and the piston is installed at one end of the second connecting shaft, wherein the first connecting shaft and the second connecting shaft are detachably connected.

[0019] In some embodiments, the driving mechanism includes a plurality of hydraulic cylinders, the plurality of hydraulic cylinders correspond one-to-one to the plurality of connecting shafts, a push rod of each of the hydraulic cylinders is connected to one end of the connecting shaft, and the plurality of hydraulic cylinders are serially synchronized hydraulic cylinders.

[0020] Compared with the prior art, the utility model provides a balancing system for a material extraction pump, wherein the pump body is provided with a pump chamber, a feed port connected to the pump chamber and a first discharge port, the piston assembly is reciprocatingly installed in the pump chamber to change the working volume of the pump chamber, and at least one of the volumetric pumps is also provided with a second discharge port; the driving mechanism is connected to a plurality of the piston assemblies; the valve assembly is arranged at the second discharge port, and the valve assembly is used to control the opening and closing of the second discharge port. When in use, the feed port extends into the barrel, and the piston assembly reciprocates in the pump chamber, so that the material in the barrel can be sucked into the pump chamber, and then the material in the pump chamber is discharged from the first discharge port. Since the plurality of volumetric pumps are of the same type, when the piston assembly makes a reciprocating motion, the discharge volumes of the plurality of volumetric pumps are the same, so when a plurality of When the volumetric pump extracts the same material, since the specific gravity of the same materials is the same, the valve assembly closes the second discharge port, and the discharge volume of the volumetric pump is the same at this time. When multiple volumetric pumps extract different materials, since the specific gravity of different materials is different, although the discharge volume is the same, the mass is different. Therefore, when a certain volumetric pump extracts a material with a larger specific gravity, the valve assembly opens the second discharge port, so that the material flows out from the first discharge port and the second discharge port at the same time, reducing the flow rate of the first discharge port, thereby ensuring the discharge volume of the first discharge port, and making the discharge volume of different materials the same. By controlling the discharge volume of the first discharge port through the valve assembly, not only can the equal mass extraction of materials in different raw material barrels be achieved, but also variable ratio feeding can be achieved, that is, it can achieve any mass ratio feeding, and the feeding balance is guaranteed.

[0021] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the preferred embodiment of the utility model is described in detail as follows with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an embodiment of a feed pump balancing system provided by the utility model;

[0023] Figure 2 yes Figure 1 Partial schematic diagram of the balance system of the central extraction pump;

[0024] Figure 3 yes Figure 1 Cross-section of a medium volume pump.

[0025] Description of reference numerals:

[0026] 1-displacement pump, 11-pump body, 111-first cavity, 112-second cavity, 113-third cavity, 114-feed port, 115-first discharge port, 116-second discharge port, 12-piston assembly, 121-connecting shaft, 1211-first connecting shaft, 1212-second connecting shaft, 122-piston;

[0027] 2-valve assembly, 21-valve body, 211-first channel, 212-second channel, 22-blocking member, 23-driving cylinder, 24-return pipe, 25-flow valve;

[0028] 3- first one-way valve;

[0029] 4- Second one-way valve. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0031] In order to solve the technical problem in the prior art that when a positive displacement pump simultaneously pumps two different materials, the viscosity and specific gravity of the materials are different, resulting in different discharge volumes of the two pumps, the utility model provides a pumping pump balancing system, which can achieve equal mass extraction of materials in different raw material barrels and can also achieve variable ratio feeding, that is, it can achieve feeding of any mass ratio and the balance of feeding is guaranteed.

[0032] See also Figure 1 , Figure 1 It is a structural schematic diagram of a feed pump balancing system in one embodiment of the utility model.

[0033] The utility model provides a material pump balancing system, comprising a plurality of volumetric pumps 1, a driving mechanism and at least one valve assembly 2, wherein the volumetric pump 1 comprises a pump body 11 and a piston assembly 12, wherein the pump body 11 is provided with a pump chamber, a feed port 114 connected to the pump chamber and a first discharge port 115, wherein the piston assembly 12 is reciprocatingly installed in the pump chamber to change the working volume of the pump chamber, wherein at least one of the volumetric pumps 1 is further provided with a second discharge port 116 connected to the pump chamber; the driving portion of the driving mechanism is connected to the plurality of piston assemblies 12; and the valve assembly 2 corresponds to the second discharge port 116, the valve assembly 2 is provided at the second discharge port 116, and the valve assembly 2 is used to control the opening and closing of the second discharge port 116 so that the discharge mass ratio of the plurality of first discharge ports reaches a preset value.

[0034] In the present embodiment, the pump body 11 is provided with a pump cavity, a feed port 114 connected to the pump cavity, a first discharge port 115 and a second discharge port 116; the piston assembly 12 is reciprocatingly installed in the pump cavity so that the working volume of the pump cavity changes; the driving part of the driving mechanism is connected to the plurality of piston assemblies 12; the valve assembly 2 is arranged at the second discharge port 116, and the valve assembly 2 is used to control the opening and closing of the second discharge port 116. When in use, the feed port 114 extends into the barrel, and the piston assembly 12 reciprocates in the pump cavity, so that the material in the barrel can be sucked into the pump cavity, and then the material in the pump cavity is pumped out from the first discharge port 115. Since the plurality of displacement pumps 1 are the same type of displacement pumps 1, when the piston assembly 12 makes a reciprocating motion, the discharge volume of the plurality of displacement pumps 1 is the same, so when the plurality of displacement pumps 1 extract When the same material is used, since the specific gravity of the same material is the same, the valve component 2 closes the second discharge port 116, and the discharge amount of the volumetric pump 1 is the same. When multiple volumetric pumps 1 extract different materials, since the specific gravity of different materials is different, although the discharge volume is the same, the mass is different. Therefore, when a certain volumetric pump 1 extracts a material with a larger specific gravity, the valve component 2 opens the second discharge port 116, so that the material flows out from the first discharge port 115 and the second discharge port 116 at the same time, reducing the flow rate of the first discharge port 115, thereby ensuring the discharge amount of the first discharge port 115, so that the discharge amount of different materials is the same. By controlling the valve component 2 to achieve the discharge amount of the first discharge port 115, not only can the equal mass extraction of materials in different raw material barrels be achieved, but also variable ratio feeding can be achieved, that is, it can achieve any mass ratio feeding, and the feeding balance is guaranteed.

[0035] It can be understood that the number of the displacement pumps 1 is not limited and can be specifically set according to actual conditions, that is, the corresponding number of displacement pumps 1 can be set according to the number of different materials. In the present embodiment, the displacement pumps 1 are provided with two. Among the two displacement pumps, one of them can be provided with the second outlet, or both can be provided with the second outlet. Accordingly, when one of them is provided with the second outlet, the valve assembly is provided with one, and when both are provided with the second outlet, the valve assembly is provided with two. The following description is based on the assumption that the displacement pumps 1 are provided with two and both of the displacement pumps are provided with the second outlet.

[0036] In one embodiment, see Figure 2 The valve assembly 2 includes a valve body 21, a blocking member 22 and a driving assembly. The valve body 21 is installed on the pump body 11. The valve body 21 is provided with a channel, one end of which is connected to the second discharge port 116. The blocking member 22 is movably installed in the channel to have a blocking state for blocking the channel and an opening state for opening the channel. The driving assembly is connected to the blocking member 22 to drive the blocking member 22 to move.

[0037] In this embodiment, the valve body 21 is installed on the outer side of the pump body 11 and is arranged corresponding to the second discharge port 116. One end of the channel is connected to the second discharge port 116, and the other end of the channel can be connected to the raw material barrel. The blocking component is movably installed in the channel and can close or open the channel. When in the open state, the second discharge port 116 is connected to the raw material barrel through the channel, and excess material can return to the raw material barrel from the second discharge port 116. When in the closed state, the channel is in a closed state, so that the material in the pump cavity cannot flow out from the second discharge port 116, but can only flow out from the first discharge port 115. The driving component is used to drive the bottom sealing component to move, so as to realize frequent opening and closing of the blocking component, improve the control accuracy, accurately control the discharge accuracy, and improve the metering accuracy.

[0038] In one embodiment, see Figure 2 The channel includes a first channel 211 and a second channel 212 connected in sequence, the diameter of the first channel 211 is larger than the diameter of the second channel 212, so that a step is formed at the connection between the first channel 211 and the second channel 212, the blocking member 22 is movably installed in the first channel 211, and the diameter of the blocking member 22 is larger than the second channel 212 and smaller than the first channel 211, so that when the blocking member 22 abuts against the step, it is in the blocking state.

[0039] In this embodiment, the first channel 211 is connected to the second discharge port 116, and the second channel 212 is connected to the raw material barrel. Since the diameter of the first channel 211 is larger than the diameter of the second channel 212, a step is formed at the connection between the first channel 211 and the second channel 212, and the blocking member 22 is movably installed in the first channel 211 along the axial direction of the first channel 211, and the diameter of the blocking member 22 is larger than the second channel 212 and smaller than the first channel 211. With such an arrangement, when the driving component drives the blocking member 22 to move toward the step and abut against the step, it can block the channel to be in the blocked state, and when the blocking component moves toward a direction away from the step and separates from the step, it is in the open state.

[0040] In this embodiment, the blocking member 22 is a sealing marble.

[0041] In one embodiment, see Figure 2 The valve assembly 2 further includes a reflux pipe 24 and a flow valve 25 . The reflux pipe 24 is connected to the other end of the channel, and the flow valve 25 is disposed on the reflux pipe 24 .

[0042] In this embodiment, in order to monitor the flow from the second discharge port 116, one end of the reflux pipe 24 is connected to one end of the second channel 212, and the other end of the reflux pipe 24 is connected to the raw material barrel, and the flow valve 25 is arranged on the reflux pipe 24. By setting the flow valve 25, the flow of the second discharge port 116 can be monitored in real time, which is convenient for controlling the flow of the second discharge port 116.

[0043] In one embodiment, see Figure 2 The driving assembly includes a driving cylinder 23 , which is mounted on the valve body 21 , and a push rod of the driving cylinder 23 extends into the channel and is connected to the blocking member 22 .

[0044] In this embodiment, the second channel 212 is bent and extended downward so that the second channel 212 is L-shaped as a whole. A through hole is provided at the end of the valve body 21 away from the pump body 11. The through hole is connected to the second channel 212 and is located at the corner of the second channel 212. The driving cylinder 23 is installed at the end of the valve body 21 away from the pump body 11, and the push rod of the driving cylinder 23 extends into the through hole into the second channel 212 and is connected to the blocking member 22, so that the blocking member 22 is driven to move by the driving cylinder 23.

[0045] In specific use, when the two displacement pumps 1 are working, the valve assembly 2 of one of the displacement pumps 1 closes the second discharge port 116, and the material is uniformly discharged from the discharge end of the displacement pump 1 (mL / min), and the valve assembly 2 of the other displacement pump 1 opens the second discharge port 116, and a reflux structure is adopted to make part of the material be diverted and reflux into the raw material barrel (m-aL / min, a is the reflux rate), and the driving cylinder 23 can be in a jog mode (such as retracting once every two seconds, and each retraction sets a volume of bL of material reflux), and the retraction times of the driving cylinder 23 can be controlled to achieve the required reflow (a=30b), and the reflow amount can also be controlled by controlling the number of retractions (such as 20 retractions, then a=20b). The advantage of this method is that the reflux structure belongs to continuous reflux, so that the delivery rate of the displacement pump 1 is roughly the same in a smaller time period, that is, the delivery amount is more balanced (for example, the delivery amount in any two seconds is fixed, that is, (ma) / 30L).

[0046] There is no limitation on the connection mode between the push rod of the driving cylinder 23 and the blocking member 22. The push rod of the driving cylinder 23 may be fixedly connected to the blocking member 22, and the blocking member 22 may be driven to switch between the open state and the blocked state by the driving cylinder 23. Alternatively, the push rod of the driving cylinder 23 may abut against the blocking member 22. The valve assembly 2 also includes an elastic member, which is arranged in the first channel 211, and the two ends of the elastic member are respectively connected to the blocking member 22 and one end of the first channel 211, so as to drive the blocking member 22 to move toward the step direction through the elastic member. At this time, the driving cylinder 23 is used to drive the blocking member 22 to move toward the direction away from the step, and the elastic member is used to drive the blocking member 22 to move toward the step direction. The driving cylinder 23 and the elastic member are used in conjunction to realize the switching of the blocking member 22 between the open state and the blocked state.

[0047] In one embodiment, the valve body 21 and the pump body 11 are detachably connected.

[0048] In this embodiment, in order to facilitate assembly, the valve body 21 and the pump body 11 are detachably connected, and the specific connection method is a threaded connection.

[0049] In one embodiment, see Figure 3The pump chamber includes a first cavity 111, a second cavity 112 and a third cavity 113 which are arranged in sequence. The first cavity 111 and the second cavity 112 are connected through a first one-way valve 3, the second cavity 112 and the third cavity 113 are connected through a second one-way valve 4, the first discharge port 115 and the second discharge port 116 are connected to the first cavity 111, and the lower end opening of the third cavity 113 is arranged to form the feed port 114.

[0050] In this embodiment, by setting the first one-way valve 3, the material can only flow from the second cavity 112 to the first cavity 111, and by setting the second one-way valve 4, the material can only flow from the third cavity 113 to the second cavity 112.

[0051] In one embodiment, see Figure 3 The piston assembly 12 includes a connecting shaft 121 and a piston 122. The connecting shaft 121 is movably inserted into the first cavity 111, the second cavity 112 and the third cavity 113 along its axial direction, and the connecting shaft 121 is located in the first cavity 111, the second cavity 112, and the diameters of the three cavity parts are different. The piston 122 is installed at one end of the connecting shaft 121 located in the third cavity 113.

[0052] In this embodiment, the first cavity 111, the second cavity 112 and the third cavity 113 are arranged in sequence from top to bottom and are interconnected. The connecting shaft 121 is inserted into the first cavity 111, the second cavity 112 and the third cavity 113, and the upper end of the connecting shaft 121 extends out of the first cavity 111, and the lower end of the connecting shaft 121 extends out of the third cavity 113 to the discharge port. A first sealing ring is provided at the connection between the first cavity 111 and the second cavity 112. The first sealing ring is located at the outer periphery of the connecting shaft 121 and is sealed with the connecting shaft 121. The second cavity 112 and the third cavity 113 are sealed. A second sealing ring is provided at the connection, and the second sealing ring is located at the outer periphery of the connecting shaft 121 and is sealed with the connecting shaft 121, and the piston 122 is fixedly installed at the lower end of the connecting shaft 121, and the connecting shaft 121 is located in the first cavity 111, the second cavity 112, and the diameters of the three cavity parts are different. For the convenience of explanation, the connecting shaft 121 is divided into a first connecting section, a second connecting section and a third connecting section from top to bottom. The diameter of the second connecting section is larger than the diameter of the first connecting section, and the diameter of the first connecting section is larger than the diameter of the third connecting section. The first sealing ring is adapted to the second connecting section, and the second sealing ring is adapted to the third connecting section.

[0053] In specific use, when the connecting shaft 121 moves upward, the piston 122 is driven to move upward, and the material in the third cavity 113 is squeezed by the piston 122, so that the material in the third cavity 113 enters the second cavity 112 through the second one-way valve 4, and at the same time, a part of the third connecting section enters the second cavity 112, causing the volume of the second cavity 112 to increase, so that it can accommodate the material entering the second cavity 112 from the third cavity 113, and a part of the second connecting section enters the first cavity 111, causing the first cavity 112 to increase. 11 is reduced, so that the material in the first cavity 111 is discharged from the first discharge port 115. When the connecting shaft 121 moves downward, the third connecting section and the second connecting section retreat to the third cavity 113 and the second cavity 112 respectively, so that the volume of the second cavity 112 and the first cavity 111 returns to the initial state, thereby transporting the material in the second cavity 112 from the first one-way valve 3 to the first cavity 111, completing a single reciprocating movement. When the connecting shaft 121 continues to reciprocate, the material can be continuously extracted.

[0054] In one embodiment, the connecting shaft 121 includes a first connecting shaft 1211 and a second connecting shaft 1212 connected in sequence, the first connecting shaft 1211 is located in the first cavity 111 and the second cavity 112, the second connecting shaft 1212 is located in the third cavity 113, and the piston 122 is installed at one end of the second connecting shaft 1212, wherein the first connecting shaft 1211 and the second connecting shaft 1212 are detachably connected.

[0055] In this embodiment, a threaded hole is provided at the lower end of the first connecting shaft 1211, and an external thread is provided at the upper end of the second connecting shaft 1212. The second connecting shaft 1212 is threadedly connected to the lower end of the first connecting shaft 1211. Such a configuration facilitates processing and assembly, wherein the first connecting section and the second connecting section are located on the first connecting shaft 1211, and the third connecting section is located on the second connecting shaft 1212.

[0056] In one embodiment, the driving mechanism includes a plurality of hydraulic cylinders, the plurality of hydraulic cylinders correspond one-to-one to the plurality of connecting shafts 121, a push rod of each of the hydraulic cylinders is connected to one end of the connecting shaft 121, and the plurality of hydraulic cylinders are serially connected synchronous hydraulic cylinders.

[0057] In this embodiment, the plurality of hydraulic cylinders are serially connected synchronous hydraulic cylinders, which can drive the plurality of connecting shafts 121 to move synchronously, thereby ensuring the consistency of the plurality of positive displacement pumps 1 .

[0058] In order to better understand the present invention, the following Figures 1 to 3 The technical solution of the utility model is described in detail:

[0059] During specific use, the expansion and contraction frequency of the driving cylinder 23 can be set according to the specific gravity of different materials, and then the two volume pumps 1 are started. When the connecting shaft 121 moves upward, the piston 122 is driven to move upward, and the material in the third cavity 113 is squeezed by the piston 122, so that the material in the third cavity 113 enters the second cavity 112 through the second one-way valve 4. At the same time, a part of the third connecting section enters the second cavity 112, causing the volume of the second cavity 112 to increase, so that it can accommodate the material entering the second cavity 112 from the third cavity 113, and a part of the second connecting section enters the first cavity 111, causing the volume of the first cavity 111 to decrease, so that the material in the first cavity 111 is discharged from the first discharge port 115. When the connecting shaft 121 moves downward, the third connecting section and the second connecting section retreat to the third cavity 113 and the second cavity 112 respectively, so that the second cavity 112 and the volume of the first cavity 111 return to the initial state, so that the material in the second cavity 112 is transported from the first one-way valve 3 to the first cavity 111, completing a single reciprocating movement. When the connecting shaft 121 continues to reciprocate, the material can be continuously extracted. The valve assembly 2 of one of the volumetric pumps 1 is always in a blocked state. At this time, the material can only be discharged from the first discharge port 115. The driving cylinder 23 in the other volumetric pump 1 is extended and retracted according to the set frequency, and the driving blocking member 22 is continuously switched between the blocked state and the open state, so that part of the material can flow back from the second discharge port 116 to the raw material barrel, thereby reducing the volume of the material at the first discharge port 115, so that the discharge amount of different materials is the same. By controlling the valve assembly 2 to achieve the discharge amount of the first discharge port 115, not only can the equal mass extraction of materials in different raw material barrels be achieved, but also variable ratio feeding can be achieved, that is, it can achieve any mass ratio feeding, and the feeding balance is guaranteed.

[0060] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A material pump balancing system, characterized in that: It includes: A plurality of displacement pumps, each of which comprises a pump body and a piston assembly, wherein the pump body is provided with a pump cavity, a feed port connected to the pump cavity, and a first discharge port, and the piston assembly is reciprocatingly mounted in the pump cavity so that the working volume of the pump cavity changes, wherein at least one of the displacement pumps is further provided with a second discharge port connected to the pump cavity; a driving mechanism connected to the plurality of piston assemblies; and At least one valve component corresponds to the second discharge port, the valve component is arranged at the second discharge port, and the valve component is used to control the opening and closing of the second discharge port so that the discharge mass ratio of multiple first discharge ports reaches a preset value.

2. The feed pump balancing system according to claim 1, characterized in that: The valve assembly includes a valve body, a blocking member and a driving assembly. The valve body is installed on the pump body. The valve body is provided with a channel. One end of the channel is connected to the second discharge port. The blocking member is movably installed in the channel to have a blocking state for blocking the channel and an opening state for opening the channel. The driving assembly is connected to the blocking member to drive the blocking member to move.

3. The material pump balancing system according to claim 2, characterized in that: The channel includes a first channel and a second channel connected in sequence, the diameter of the first channel is larger than the diameter of the second channel, so that a step is formed at the connection between the first channel and the second channel, the blocking member is movably installed in the first channel, and the diameter of the blocking member is larger than the second channel and smaller than the first channel, so that when the blocking member abuts against the step, it is in the blocking state.

4. The material pump balancing system according to claim 2, characterized in that: The valve assembly further comprises a reflux pipe and a flow valve, wherein the reflux pipe is connected to the other end of the channel, and the flow valve is arranged on the reflux pipe.

5. The material pump balancing system according to claim 2, characterized in that: The driving assembly comprises a driving cylinder, the driving cylinder is mounted on the valve body, and a push rod of the driving cylinder extends into the channel and is connected to the blocking member.

6. The material pump balancing system according to claim 2, characterized in that: The valve body and the pump body are detachably connected.

7. The material pump balancing system according to claim 1, characterized in that: The pump chamber includes a first cavity, a second cavity and a third cavity which are arranged in sequence, the first cavity and the second cavity are connected through a first one-way valve, the second cavity and the third cavity are connected through a second one-way valve, the first discharge port and the second discharge port are connected to the first cavity, and the lower end opening of the third cavity is arranged to form the feed port.

8. The material pump balancing system according to claim 7, characterized in that: The piston assembly includes a connecting shaft and a piston. The connecting shaft is movably inserted into the first cavity, the second cavity and the third cavity along its axial direction, and the diameters of the connecting shaft located in the first cavity, the second cavity and the three cavities are different. The piston is installed at one end of the connecting shaft located in the third cavity.

9. The material pump balancing system according to claim 8, characterized in that: The connecting shaft includes a first connecting shaft and a second connecting shaft connected in sequence, the first connecting shaft is located in the first cavity and the second cavity, the second connecting shaft is located in the third cavity, and the piston is installed at one end of the second connecting shaft, wherein the first connecting shaft and the second connecting shaft are detachably connected.

10. The material pump balancing system according to claim 8, characterized in that: The driving mechanism comprises a plurality of hydraulic cylinders, the plurality of hydraulic cylinders correspond to the plurality of connecting shafts one by one, a push rod of each of the hydraulic cylinders is connected to one end of the connecting shaft, and the plurality of hydraulic cylinders are serially synchronous hydraulic cylinders.

Images