A control method and control system for a solid pump and a solid pump

Abstract

The application provides a control method, a control system and a solid pump. The control method comprises the following steps: obtaining a target output; determining a filling speed, a retreating speed and a target period according to the target output; obtaining preset times of each action in a pumping period of the solid pump; determining a preset pushing time according to the target period and the preset times; determining a pushing hydraulic displacement according to the preset pushing time; controlling the solid pump to execute according to the filling speed, a preset gate opening time, the pushing hydraulic displacement, a preset gate closing time and the retreating speed, and timing to obtain actual execution times of the actions; determining a waiting time according to the target period and the actual execution times; and controlling the solid pump to execute according to the waiting time. The application greatly simplifies operation parameters of the solid pump, simplifies interlocking of the solid pump and other equipment, reduces operation difficulty, reduces a failure rate, reduces operation cost, and improves economic benefits.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hazardous waste treatment, and particularly relates to a control method and system of a solid pump and the solid pump. BACKGROUND

[0002] SMP is a broken-mixed-pumping system, and solid waste is transported to the next process by a pump after being broken and mixed. SMP is widely used in cement kiln co-processing of hazardous waste in large cement plants. In the SMP system, the pumping step is usually completed by a solid pump, which is used to transport the broken and mixed solid waste to a rotary kiln. As the last conveying device in the SMP system, the running state of the solid pump will directly affect the stability of the equipment output and the kiln condition of the cement kiln. The working process of the solid pump in a pumping cycle is usually as follows: filling, opening the gate, pushing the material, closing the gate, retreating, and waiting. The control system of the solid pump needs to control the filling speed, gate opening time, pushing hydraulic displacement, gate closing time, retreating speed, and waiting time. At the same time, the solid pump needs to be interlocked with the cement kiln for conveying materials in the SMP system. However, the working process of the solid pump is complex, and the parameter control of each working process is complicated, which has seriously restricted the interlocking of the solid pump with other devices.

[0003] Therefore, it is necessary to provide an intelligent control method for simplifying the running parameters of the solid pump and simplifying the interlocking of the solid pump with other devices. SUMMARY

[0004] The technical problem solved by the application is to provide a control method and system of a solid pump, which greatly simplifies the running parameters of the solid pump, simplifies the interlocking of the solid pump with other devices, reduces the operation difficulty, reduces the failure rate, reduces the operation cost, and improves the economic benefit.

[0005] To solve the above problems, the first aspect of the application provides a control method of a solid pump, wherein the actions of the solid pump in a pumping cycle include filling, gate opening, pushing, gate closing, retreating, and waiting, and the control method comprises the following steps:

[0006] obtaining a target output;

[0007] determining a filling speed, a retreating speed, and a target period according to the target output;

[0008] obtaining preset times of each action in a pumping cycle of the solid pump, wherein the preset times include a preset filling time, a preset gate opening time, a preset gate closing time, a preset retreating time, and a preset waiting time;

[0009] determining a preset pushing time according to the target period and the preset times;

[0010] The hydraulic displacement of the pusher is determined based on the preset pushing time;

[0011] The solid pump is controlled to sequentially perform packing, gate opening, pushing, gate closing, and retraction according to the packing speed, the preset gate opening time, the pushing hydraulic displacement, the preset gate closing time, and the retraction speed. The actual execution time of each action is obtained by timing each action, which includes the packing time, gate opening time, pushing time, gate closing time, and retraction time.

[0012] The waiting time is determined based on the target period and the actual execution time.

[0013] The solid pump is controlled to wait according to the specified waiting time.

[0014] Preferably, determining the packing speed, retraction speed, and target cycle based on the target output specifically includes:

[0015] Determine the theoretical pumping volume at the target output level;

[0016] Based on the theoretical pumping volume, determine the packing speed, retraction speed, and target cycle.

[0017] Preferably, determining the theoretical pumping volume under the target output based on the target output specifically includes:

[0018] V = Target output / η;

[0019] Where V is the theoretical pumping volume; η is the theoretical correction coefficient; if it is the first pumping cycle, the correction coefficient is an empirical value; if it is not the first pumping cycle, the theoretical correction coefficient is the actual correction coefficient of the previous feeding cycle.

[0020] Preferably, determining the packing velocity and retraction velocity based on the theoretical pumping volume specifically includes:

[0021] Based on the step function inside the solid pump system, determine the step in which the theoretical pumping volume is located, and obtain the packing velocity and backflow velocity corresponding to the step.

[0022] Preferably, determining the target cycle based on the theoretical pumping volume specifically includes:

[0023] Based on the theoretical pumping volume, and using the formula V=Π(R / 2) 2 *L*3600 / T 周期 Determine the target cycle; where R is the diameter of the solid pump's cylinder; L is the length of the solid pump's cylinder; T 周期 denoted as the target cycle; V represents the theoretical pumping volume.

[0024] Preferably, obtaining the preset time for each action within one pumping cycle of the solid pump specifically includes:

[0025] If it is the first pumping cycle, the preset filling time, the preset gate opening time, the preset gate closing time, and the preset retraction time are respectively estimated times of each action obtained by looking up the data in the internal empirical value table of the control program;

[0026] If it is not the first pumping cycle, the preset packing time, the preset gate opening time, the preset gate closing time, and the preset retraction time are respectively adopted as the actual packing time, the gate opening time, the gate closing time, and the retraction time executed in the previous pumping cycle.

[0027] Preferably, the step of obtaining the preset time for each action within one pumping cycle of the solid pump further includes:

[0028] If it is the first pumping cycle, the preset waiting time adopts the preset empirical value inside the program;

[0029] If it is not the first pumping cycle, the preset waiting time is the actual waiting time of the previous pumping cycle plus a certain margin.

[0030] Preferably, determining the hydraulic displacement of the pusher based on the preset pushing time specifically includes:

[0031] Based on the preset pushing time, the pushing hydraulic displacement is calculated using the formula t2 = L * S / Q, where L is the length of the solid pump cylinder; S is the cross-sectional area of ​​the rodless chamber of the hydraulic push rod of the solid pump; t2 is the pushing time; and Q is the pushing hydraulic displacement.

[0032] A second aspect of the present invention provides a control system for a solid pump, wherein the actions of the solid pump during one pumping cycle include packing, gate opening, material pushing, gate closing, retraction, and waiting, and the control system includes:

[0033] The acquisition module is used to acquire the target output and the preset time of each action of the solid pump within one pumping cycle. The preset time includes preset filling time, preset gate opening time, preset gate closing time, preset back-off time and preset waiting time.

[0034] The calculation module is used to determine the filling speed, retraction speed, and target cycle based on the target output; determine the preset pushing time based on the target cycle and the preset time; determine the pushing hydraulic displacement based on the preset pushing time; and determine the waiting time based on the target cycle and the actual execution time.

[0035] The execution module is used to control the solid pump to sequentially perform packing, gate opening, pushing, gate closing, retraction, and waiting according to the packing speed, the preset gate opening time, the pushing hydraulic displacement, the preset gate closing time, the retraction speed, and the waiting time.

[0036] The timing module is used to time each action of the solid pump to obtain the actual execution time of each action, which includes the packing time, gate opening time, material pushing time, gate closing time, and retraction time.

[0037] A third aspect of the present invention provides a solid pump, comprising:

[0038] The solid pump body and the control system of the solid pump are described above; the solid pump body includes a main plunger drive mechanism and a gate plunger drive mechanism; the main plunger drive mechanism and the gate plunger drive mechanism are electrically connected to the execution module respectively.

[0039] Compared with the prior art, the present invention has the following advantages:

[0040] The present invention relates to a solid pump control method, a control system, and a solid pump. The target output is provided by equipment interlocked with the solid pump. In the process of co-processing hazardous waste in cement kilns, the output is generally provided by the cement kiln that transports the material. The control method obtains the appropriate operating parameters required for intelligent control of the solid pump under the corresponding target output through several calculation steps. The operating parameters include packing speed, pusher hydraulic displacement, retraction speed, gate opening time, gate closing time, and waiting time. This greatly simplifies the operating parameters of the solid pump, simplifies the interlocking of the solid pump with other equipment, reduces the difficulty of operation, reduces the failure rate, reduces operating costs, and improves economic efficiency. Attached Figure Description

[0041] Figure 1 This is a flowchart of the solid pump control method in Embodiment 1 of the present invention;

[0042] Figure 2 This is a circuit connection diagram of the control system of the solid pump in Embodiment 2 of the present invention;

[0043] Figure 3 This is a schematic diagram of the solid pump in Embodiment 1 of the present invention;

[0044] Figure 4 This is a schematic diagram of the solid pump's working process in Embodiment 1 of the present invention.

[0045] Wherein: 1-Push head; 2-Cutting ring; 3-Material cylinder; 4-Feed cylinder; 5-Gate; 6-Main plunger; 7-Gate plunger. Detailed Implementation

[0046] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0047] Example 1

[0048] like Figure 3 , Figure 4 As shown, the operation (i.e., workflow) of a solid pump within one pumping cycle is as follows: packing ( Figure 4 (b) The gate is open ( Figure 4 c), Pushing material ( Figure 4 d) Gate closing ( Figure 4 (middle) (backward) Figure 4 f), waiting ( Figure 4 In step a), the packing material, i.e., the pusher head 1 of the solid pump, moves forward from the tail end until it passes the cutting ring 2 and fully enters the material cylinder 3, pushing the material in the feed cylinder 4 into the material cylinder 3 and compressing the material to a certain extent, thus expelling the gas in the material; the gate opens, i.e., the solid pump gate 5 opens upward from the closed state, preparing for pumping material; the pushing stage is the actual pumping stage, where the pusher head 1 continues to move forward until it reaches the pump head position, pushing the material in the material cylinder 3 through the packing material into the slurry pipeline, while at the other end of the slurry pipeline, at the kiln inlet, an equal volume of material enters the rotary kiln; the gate closes, i.e., the solid pump gate 5 closes downward from the open state, ending the pumping of material, blocking the material from the material cylinder 3, preventing material backflow, and also cutting off the material remaining at the pump inlet; the retraction stage is when the solid pump pusher head 1 retracts until it reaches the tail end, preparing for the next packing; the waiting stage is when the solid pump pusher head 1 waits at the tail end, at which time the equipment for feeding the solid pump is running, filling the feed cylinder 4 with material.

[0049] like Figure 1 As shown, a solid pump control method according to this embodiment includes the following steps:

[0050] Step 11, obtain the target output;

[0051] Step 12: Determine the packing speed, retraction speed, and target cycle based on the target output;

[0052] Step 13: Obtain the preset time for each action of the solid pump within one pumping cycle. The preset time includes preset packing time, preset gate opening time, preset gate closing time, preset retraction time, and preset waiting time.

[0053] Step 14: Determine the preset material pushing time based on the target cycle and preset time;

[0054] Step 15: Determine the hydraulic displacement of the pusher according to the preset pusher time;

[0055] Step 16: Control the solid pump to perform packing, gate opening, pushing, gate closing, and retraction in sequence according to the packing speed, preset gate opening time, pushing hydraulic displacement, preset gate closing time, and retraction speed. Time each action to obtain the actual execution time of each action. The actual execution time includes packing time, gate opening time, pushing time, gate closing time, and retraction time.

[0056] Step 17: Determine the waiting time based on the target cycle and the actual execution time;

[0057] Step 18: Control the solid pump to wait according to the waiting time.

[0058] The solid pump control method of this invention provides the target output from equipment interlocked with the solid pump. In the process of co-processing hazardous waste in cement kilns, the target output is generally provided by the cement kiln that transports the material. This control method calculates the appropriate operating parameters required for intelligent control of the solid pump at the corresponding target output through several steps. The operating parameters include packing speed, hydraulic displacement of the pusher, retraction speed, gate opening time, gate closing time, and waiting time. This greatly simplifies the operating parameters of the solid pump, simplifies the interlocking of the solid pump with other equipment, reduces the difficulty of operation, reduces the failure rate, reduces operating costs, and improves economic efficiency.

[0059] In some implementations, obtaining the target output specifically involves obtaining the target output from equipment interlocked with the solids pump. In the process of co-processing hazardous waste in a cement kiln, the target output is usually obtained from the corresponding equipment in the cement kiln, and the delivery rate of the solids pump is determined based on the cement kiln's demand for hazardous waste materials.

[0060] In some implementations, step 12, determining the packing speed, retraction speed, and target cycle based on the target output, specifically includes:

[0061] Step 121: Determine the theoretical pumping volume under the target output based on the target output.

[0062] Step 122: Determine the packing speed, retraction speed, and target cycle based on the theoretical pumping volume.

[0063] In some implementations, step 121, determining the theoretical pumping volume at the target output based on the target output, specifically includes:

[0064] V = Target output / η;

[0065] Where V is the theoretical pumping volume; η is the theoretical correction coefficient; if it is the first pumping cycle, the correction coefficient is an empirical value; if it is not the first pumping cycle, the theoretical correction coefficient is the actual correction coefficient of the previous feeding cycle.

[0066] That is: Theoretical pumping volume V = target output / material density / filling rate; At this point, a theoretical correction coefficient η is introduced, and η = material density * filling rate, resulting in:

[0067] Theoretical pumping volume V = target output / theoretical correction factor η;

[0068] Since the materials are fully mixed by the mixer, the density and filling rate of the materials (mainly affected by the flowability of the materials) should be in a stable state, that is, there will be no significant increase or decrease in a short period of time. Therefore, the theoretical correction coefficient η can be the actual correction coefficient η of the previous feeding cycle.

[0069] According to the above formula: theoretical pumping volume V = target output / correction coefficient η, the actual correction coefficient η of the previous feeding cycle can be converted to: actual output / actual pumping volume; where the actual output is the amount of material fed in the previous feeding cycle, which can be obtained by using the weighing system of the upstream equipment (mixer), and the actual pumping volume can be obtained by multiplying the number of pumping cycles by the maximum pumping amount per cycle (which is a constant value).

[0070] Thus, the theoretical correction factor η can be obtained, and the theoretical pumping volume V can be calculated.

[0071] The mixer is the one used in the mixing step of the SMP system.

[0072] The packing flow and retraction flow affect the frequency interval of material entering the kiln. Based on kiln conditions, the faster the better; however, considering the impact and wear on the equipment, excessively high speeds should be avoided. In some implementations, step 122, determining the packing speed and retraction speed based on the theoretical pumping volume, specifically includes:

[0073] Based on the step function within the solid pump system, determine the step containing the theoretical pumping volume, and obtain the corresponding packing velocity and retraction velocity. Based on the step containing different pumping volumes V, the packing velocity and retraction velocity that satisfy this pumping volume V while minimizing equipment wear can be obtained. For example, if the theoretical pumping volume is 6m³... 3 When / h, it was found through a function query within the program that the filling speed and retraction speed need to be set to 90%.

[0074] In some implementations, step 122, determining the target cycle based on the theoretical pumping volume, specifically includes:

[0075] Based on the theoretical pumping volume, and using the formula V=Π(R / 2)2 *L*3600 / T 周期 The target cycle is determined; where R is the diameter of the feed cylinder 3 of the solid pump; L is the length of the feed cylinder 3 of the solid pump; T is the target cycle; and V is the theoretical pumping volume.

[0076] In some implementations, step 13, obtaining the preset time for each action within one pumping cycle of the solid pump, specifically includes:

[0077] If it is the first pumping cycle, the preset packing time, preset gate opening time, preset gate closing time, and preset retraction time are respectively obtained by using the estimated time of each action through the internal step function of the program (i.e., the empirical value table of time corresponding to different speeds).

[0078] If it is not the first pumping cycle, the preset packing time, preset gate opening time, preset gate closing time, and preset retraction time shall be the actual packing time, gate opening time, gate closing time, and retraction time of the previous pumping cycle, respectively.

[0079] In some implementations, step 13, obtaining the preset time for each action within one pumping cycle of the solid pump, further includes:

[0080] If it is the first pumping cycle, the preset waiting time is the estimated time obtained through the internal function of the program plus a certain margin;

[0081] If it is not the first pumping cycle, the preset waiting time is the actual execution waiting time of the previous pumping cycle plus a certain margin. This margin in the preset waiting time is used to adjust the process cycle when determining the waiting time based on the target cycle and the actual execution time. Specifically, the margin in the preset waiting time is generally 3-5 seconds.

[0082] In some implementations, step 14, determining the preset feeding time based on the target cycle and the preset time, specifically includes:

[0083] Since the actions of a solid pump during one pumping cycle include packing, gate opening, pushing, gate closing, retraction, and waiting, then T 周期 =t1+t2+t 开 +t 关 +t 退 +t 等待 The preset feeding time is calculated according to this formula, where T 周期 The target cycle is defined as follows: t1 is the preset filling time, t2 is the preset pushing time, and t... 开 t is the preset gate opening time. 关 t is the preset gate closing time. 退 To preset the backoff time, t 等待This is the preset waiting time.

[0084] In some implementations, step 15, determining the hydraulic displacement of the pusher based on a preset pushing time, specifically includes:

[0085] Based on the preset pushing time, the hydraulic displacement of the pusher is calculated using the hydraulic control principle formula t2=L / v=L / (Q / S)=L*S / Q, where L is the length of the material cylinder 3 of the solid pump; v is the pushing speed; S is the cross-sectional area of ​​the rodless cavity of the hydraulic push rod of the solid pump (i.e., the cross-sectional area of ​​the cavity minus the cross-sectional area of ​​the push rod); t2 is the pushing time; and Q is the hydraulic displacement.

[0086] In some implementations, step 17, determining the waiting time based on the target period and the actual execution time, specifically includes:

[0087] Through T 周期 =t 1实 +t 2实 +t 开实 +t 关实 +t 退实 +t 等待实 Calculate the waiting time, where T 周期 For the target period, t 1实 t represents the actual filling time. 2实 t represents the actual material pushing time. 开实 t represents the actual gate opening time. 关实 t represents the actual gate closing time. 退实 t represents the actual backoff time. 等待实 This represents the actual waiting time before execution.

[0088] Example 2

[0089] like Figure 2 As shown, the control system 8 of a solid pump in this embodiment includes:

[0090] The acquisition module 801 is used to acquire the target output and the preset time of each action of the solid pump within one pumping cycle. The preset time includes preset filling time, preset gate opening time, preset gate closing time, preset back-off time and preset waiting time.

[0091] The calculation module 802 is used to determine the filling speed, retraction speed and target cycle based on the target output; determine the preset pushing time based on the target cycle and preset time; determine the pushing hydraulic displacement based on the preset pushing time; and determine the waiting time based on the target cycle and actual execution time.

[0092] The execution module 803 is used to control the solid pump to perform the following actions in sequence according to the packing speed, preset gate opening time, push material hydraulic displacement, preset gate closing time, retraction speed, and waiting time: packing, gate opening, push material, gate closing, retraction, and waiting.

[0093] The timing module 804 is used to time the various actions of the solid pump and obtain the actual execution time of each action. The actual execution time includes the packing time, gate opening time, material pushing time, gate closing time, and retraction time.

[0094] In some embodiments, the acquisition module 801 may further include a target output acquisition module and a preset time acquisition module; the target output acquisition module is used to acquire the target output; the preset time acquisition module is used to acquire the preset time of each action within one pumping cycle of the solid pump.

[0095] Furthermore, the preset time acquisition module may further include a preset filling time acquisition module, a preset gate opening time acquisition module, a preset gate closing time acquisition module, a preset backoff time acquisition module, and a preset waiting time acquisition module; the preset filling time acquisition module is used to acquire the preset filling time; the preset gate opening time acquisition module is used to acquire the preset gate opening time; the preset gate closing time acquisition module is used to acquire the preset gate closing time; the preset backoff time acquisition module is used to acquire the preset backoff time; and the preset waiting time acquisition module is used to acquire the preset waiting time.

[0096] In some embodiments, the calculation module 802 may further include a packing speed calculation module, a retraction speed calculation module, a target cycle calculation module, a preset pushing time calculation module, a pushing hydraulic displacement calculation module, and a waiting time calculation module; the packing speed calculation module is used to determine the packing speed based on the target output; the retraction speed calculation module is used to determine the retraction speed based on the target output; the target cycle calculation module is used to determine the target cycle based on the target output; the preset pushing time is determined based on the target cycle and the preset time; the preset pushing time calculation module is used to determine the preset pushing time based on the target cycle and the preset time; the pushing hydraulic displacement calculation module is used to determine the pushing hydraulic displacement based on the preset pushing time; and the waiting time calculation module is used to determine the waiting time based on the target cycle and the actual execution time.

[0097] In some embodiments, the execution module 803 may further include a packing execution module, a gate opening execution module, a pushing execution module, a gate closing execution module, a retraction execution module, and a waiting execution module; the packing execution module is used to control the solid pump to execute according to the packing speed; the gate opening execution module is used to control the solid pump to execute according to a preset gate opening time; the pushing execution module is used to control the solid pump to execute according to the pushing hydraulic displacement; the gate closing execution module is used to control the solid pump to execute according to a preset gate closing time; the retraction execution module is used to control the solid pump to execute according to the retraction speed; and the waiting execution module is used to control the solid pump to execute according to the waiting time.

[0098] In some embodiments, the timing module 804 may further include a packing time timing module, a gate opening time timing module, a material pushing time timing module, a gate closing time timing module, and a retraction time timing module; the packing time timing module is used to time the packing time of the solid pump to obtain the actual packing time; the gate opening time timing module is used to time the gate opening time of the solid pump to obtain the actual gate opening time; the material pushing time timing module is used to time the material pushing time of the solid pump to obtain the actual material pushing time; the gate closing time timing module is used to time the gate closing time of the solid pump to obtain the actual gate closing time; and the retraction time timing module is used to time the retraction time of the solid pump to obtain the actual retraction time.

[0099] The control method for the solid pump control system in this embodiment can be the control method in Embodiment 1.

[0100] The solid pump control system of this embodiment obtains the appropriate operating parameters required for intelligent control of the solid pump under the corresponding target output through several calculations. The operating parameters include packing speed, pusher hydraulic displacement, retraction speed, gate opening time, gate closing time and waiting time. This greatly simplifies the operating parameters of the solid pump, simplifies the interlocking of the solid pump with other equipment, reduces the difficulty of operation, reduces the failure rate, reduces operating costs, and improves economic efficiency.

[0101] Example 3

[0102] like Figure 3 As shown, a solid pump according to this embodiment includes:

[0103] The solid pump body and the solid pump control system 8 of Embodiment 2; the solid pump body includes a main plunger drive mechanism and a gate plunger drive mechanism; the main plunger drive mechanism is used to drive the main plunger 6 of the solid pump to reciprocate back and forth, thereby pushing the push head 1 at its end to reciprocate; the gate plunger drive mechanism is used to drive the gate plunger 7 to reciprocate up and down, thereby causing the gate 5 to open or close under the drive of the gate plunger 7; the main plunger drive mechanism and the gate plunger drive mechanism are electrically connected to the execution module respectively.

[0104] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A control method for a solid pump, wherein the actions of the solid pump within one pumping cycle include packing, gate opening, material pushing, gate closing, retraction, and waiting, characterized in that, The control method includes the following steps: To achieve the target output; Based on the target output, determine the packing speed, retraction speed, and target cycle time; The preset times for each action of the solid pump within one pumping cycle are obtained, including preset packing time, preset gate opening time, preset gate closing time, preset retraction time, and preset waiting time. The preset feeding time is determined based on the target cycle and the preset time; The hydraulic displacement of the pusher is determined based on the preset pushing time; The solid pump is controlled to sequentially perform packing, gate opening, pushing, gate closing, and retraction according to the packing speed, the preset gate opening time, the pushing hydraulic displacement, the preset gate closing time, and the retraction speed. The actual execution time of each action is obtained by timing each action, which includes the packing time, gate opening time, pushing time, gate closing time, and retraction time. The waiting time is determined based on the target period and the actual execution time. The solid pump is controlled to wait according to the specified waiting time; The determination of the packing speed, retraction speed, and target cycle based on the target output specifically includes: Determine the theoretical pumping volume at the target output level; Based on the theoretical pumping volume, determine the packing velocity, retraction velocity, and target cycle. The determination of the theoretical pumping volume under the target output, based on the target output, specifically includes: V = target output / η; Where V is the theoretical pumping volume; η is the theoretical correction coefficient; η = material density × filling rate; if it is the first pumping cycle, the theoretical correction coefficient is an empirical value; if it is not the first pumping cycle, the theoretical correction coefficient is the actual correction coefficient of the previous material feeding cycle. The determination of the target cycle based on the theoretical pumping volume specifically includes: Based on the theoretical pumping volume, and using the formula V=π(R / 2) 2 L 3600 / T 周期 Determine the target cycle; where R is the diameter of the solid pump's cylinder; L is the length of the solid pump's cylinder; T 周期 denoted as the target cycle; V represents the theoretical pumping volume.

2. The control method for a solid pump according to claim 1, characterized in that, The determination of the packing velocity and retraction velocity based on the theoretical pumping volume specifically includes: Based on the step function inside the solid pump system, determine the step in which the theoretical pumping volume is located, and obtain the packing velocity and backflow velocity corresponding to the step.

3. The control method for a solid pump according to claim 1, characterized in that: The method of obtaining the preset time for each action within one pumping cycle of the solid pump specifically includes: If it is the first pumping cycle, the preset filling time, the preset gate opening time, the preset gate closing time, and the preset retraction time are respectively estimated times of each action obtained by looking up the data in the internal empirical value table of the control program; If it is not the first pumping cycle, the preset packing time, the preset gate opening time, the preset gate closing time, and the preset retraction time are respectively adopted as the actual packing time, the gate opening time, the gate closing time, and the retraction time executed in the previous pumping cycle.

4. The control method for a solid pump according to claim 1, characterized in that: The method of obtaining the preset time for each action of the solid pump within one pumping cycle also includes: If it is the first pumping cycle, the preset waiting time adopts the preset empirical value inside the program; If it is not the first pumping cycle, the preset waiting time is the actual waiting time of the previous pumping cycle plus a certain margin.

5. The control method for a solid pump according to claim 1, characterized in that: The step of determining the hydraulic displacement of the pusher based on the preset pushing time specifically includes: Based on the preset feeding time, the formula t2 = L is used. The hydraulic displacement of the pusher is calculated using the S / Q ratio, where L is the length of the solid pump cylinder; S is the cross-sectional area of ​​the rodless chamber of the hydraulic pusher rod of the solid pump; t2 is the pushing time; and Q is the hydraulic displacement of the pusher.

6. A control system for a solid pump, used to execute the control method for a solid pump as described in any one of claims 1-5, wherein the actions of the solid pump in one pumping cycle include packing, gate opening, pushing, gate closing, retraction, and waiting, characterized in that, The control system includes: The acquisition module is used to acquire the target output and the preset time of each action of the solid pump within one pumping cycle. The preset time includes preset filling time, preset gate opening time, preset gate closing time, preset back-off time and preset waiting time. The calculation module is used to determine the filling speed, retraction speed, and target cycle based on the target output; determine the preset pushing time based on the target cycle and the preset time; determine the pushing hydraulic displacement based on the preset pushing time; and determine the waiting time based on the target cycle and the actual execution time. The execution module is used to control the solid pump to sequentially perform packing, gate opening, pushing, gate closing, retraction, and waiting according to the packing speed, the preset gate opening time, the pushing hydraulic displacement, the preset gate closing time, the retraction speed, and the waiting time. The timing module is used to time each action of the solid pump to obtain the actual execution time of each action, which includes the packing time, gate opening time, material pushing time, gate closing time, and retraction time.

7. A solid pump, characterized in that, include: Solid pump body and control system of solid pump as described in claim 6; The solid pump body includes a main plunger drive mechanism and a gate plunger drive mechanism; the main plunger drive mechanism and the gate plunger drive mechanism are electrically connected to the execution module.

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