Efficient numerical control liquid injection pump capable of discharging liquid at two ends in two directions

Abstract

The utility model discloses a double-end bidirectional liquid outlet efficient numerical control liquid injection pump which comprises a motor assembly, a liquid outlet assembly, a liquid inlet assembly and a liquid outlet assembly. The first pump head assembly is arranged on the left side of the motor assembly, the first pump head assembly comprises a first cylinder body with a first inner cavity and a first plunger, the first cylinder body is further provided with a first liquid inlet and a first liquid outlet which are communicated with the first inner cavity, and the first plunger is connected with one end of the output shaft; the second pump head assembly is arranged on the right side of the motor assembly, the second pump head assembly comprises a second cylinder body with a second inner cavity and a second plunger, the second cylinder body is further provided with a second liquid inlet and a second liquid outlet which are communicated with the second inner cavity, and the second plunger is connected with the other end of the output shaft. The whole structure is simple and compact, the motor with the penetrating shaft is adopted, the structural layout of the liquid injection pump is simplified, the size of the liquid injection pump is reduced, high stability and efficient liquid injection efficiency are achieved, and the problems that in the prior art, the structure is complex, and the liquid injection efficiency is poor are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid injection pump technical field especially relates to a double -end two -way liquid -out high -efficient numerical control liquid injection pump. BACKGROUND

[0002] Liquid injection pump is generally plunger structure, its structure includes driver and pump head subassembly, and the pump head subassembly includes the cylinder body with inner chamber and the plunger being put into the inner chamber, and the output end of driver is fixed with plunger, and the cylinder body is equipped with the liquid inlet and liquid outlet that lead to the inner chamber, and the driving motor drives the plunger to slide along the inner chamber of cylinder body, thereby utilizing pressure to drive the inflow and outflow of liquid.

[0003] The existing liquid injection pump, its pump head subassembly generally can only carry out liquid or liquid, cannot carry out liquid simultaneously, that is to say, the process of plunger movement to one direction is either liquid process or liquid process, and liquid and liquid are carried out alternately, and there is the problem of low liquid injection efficiency.

[0004] In addition, the existing liquid injection pump is generally provided with only a single pump head subassembly, and a single liquid injection pump can only be matched with a liquid injection system for use, if there are multiple liquid injection systems requiring liquid injection pump, generally, one liquid injection pump needs to be equipped for each system, and there is the problem of high cost and complex structure. UTILITY MODEL CONTENTS

[0005] The utility model wants to solve the technical problem to provide a double -end two -way liquid -out high -efficient numerical control liquid injection pump, and the front end and rear end of the liquid injection pump are equipped with pump head subassembly, and two pump head subassemblies are driven using one driving source, and the problems of low liquid injection efficiency, complex structure and high manufacturing cost can be solved.

[0006] In order to solve the above technical problem, the utility model discloses a double -end two -way liquid -out high -efficient numerical control liquid injection pump, including motor assembly, it includes motor body and the output shaft that penetrates motor body and can reciprocate along the axial direction of motor body, first pump head subassembly is arranged at the left side of motor assembly, and the first pump head subassembly includes the first cylinder body with first inner chamber and the first plunger being put into the first cylinder body, and the first cylinder body is equipped with the first liquid inlet and first liquid outlet that lead to the first inner chamber, and the first plunger is connected with one end of the output shaft, second pump head subassembly is arranged at the right side of motor assembly, and the second pump head subassembly includes the second cylinder body with second inner chamber and the second plunger being put into the second cylinder body, and the second cylinder body is equipped with the second liquid inlet and second liquid outlet that lead to the second inner chamber, and the second plunger is connected with the other end of the output shaft.

[0007] Wherein, it also includes the shell, and the motor assembly is installed in the shell, and the first pump head subassembly is fixedly installed at the left side of the shell, and the second pump head subassembly is fixedly installed at the right side of the shell.

[0008] The output shaft is connected with the first plunger through a floating coupling.

[0009] The output shaft is connected with the second plunger through a floating coupling.

[0010] The first plunger comprises a plunger head, which is arranged in the first inner cavity to divide the first inner cavity into a first cavity and a second cavity, and the plunger head is slidable along the axial direction of the first cylinder body.

[0011] The first pump head assembly further comprises a first flow collecting piece fixedly arranged on the left side of the first cylinder body, the liquid inlet is formed on the first flow collecting piece, the first flow collecting piece is internally provided with a first flow collecting channel communicated with the first liquid inlet, the first flow collecting channel is provided with a first branch communicated with the first cavity and a second branch communicated with the second cavity, and the first branch and the second branch are both provided with a liquid inlet check valve.

[0012] The first pump head assembly further comprises a second flow collecting piece fixedly arranged on the right side of the first cylinder body, the liquid outlet is formed on the second flow collecting piece, the second flow collecting piece is internally provided with a second flow collecting channel communicated with the first liquid outlet, the second flow collecting channel is provided with a third branch communicated with the first cavity and a fourth branch communicated with the second cavity, and the third branch and the fourth branch are both provided with a liquid outlet check valve.

[0013] The first plunger further comprises a plunger rod fixedly connected with the plunger head, the plunger rod is of a ceramic structure, and the plunger head is of 316L stainless steel.

[0014] The first pump head assembly further comprises a plunger sleeve arranged on the inner side surface of the first inner cavity, the plunger head is sealingly attached to the inner wall of the plunger sleeve, and the plunger sleeve is of a ceramic structure.

[0015] The outer peripheral side of the plunger head is provided with a sealing gasket, and the sealing gasket is of perfluoroether rubber.

[0016] Compared with the prior art, the embodiments of the utility model have the following beneficial effects:

[0017] (1) The liquid injection pump is provided with the first pump head assembly and the second pump head assembly, the first pump head assembly and the second pump head assembly can be connected with two independent liquid injection systems respectively, the number of liquid injection pumps is saved, the cost is reduced, the economic benefit is improved, the structure of the liquid injection system is simplified, and the problems of complex structure and high manufacturing cost in the prior art are solved.

[0018] (2) The first pump head assembly and the second pump head assembly can be simultaneously connected to the same liquid injection system, the liquid injection efficiency is improved, and the problem of low liquid injection efficiency in the prior art is solved.

[0019] (3) The whole structure is simple and compact, the motor with the through shaft is adopted, the structure layout of the liquid injection pump is simplified, the volume of the liquid injection pump is reduced, higher stability and high injection efficiency are achieved, and the problems of complex structure and poor injection efficiency in the prior art are solved.

[0020] (4) In other embodiments, the first pump head assembly and the second pump head assembly can simultaneously perform liquid inlet and liquid outlet, further improving the injection efficiency of the liquid injection pump, and solving the problem of low injection efficiency in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0022] Figure 1 is a structure schematic view of the liquid injection pump in the embodiment;

[0023] Figure 2 is a sectional view of the liquid injection pump in the embodiment;

[0024] Figure 3 is Figure 2 an enlarged view of A in the embodiment;

[0025] Figure 4 is Figure 2 an enlarged view of B in the embodiment. DETAILED DESCRIPTION

[0026] In order to make the person skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] The terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish different objects, not to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or end including a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units not listed, or optionally also includes other steps or units inherent to the process, method, product or end.

[0028] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment. It is explicitly contemplated that embodiments described herein can be combined with each other in their individual aspects.

[0029] The utility model discloses a kind of double-head bidirectional liquid outlet's high-efficiency numerical control liquid injection pump specific implementation, please see Figure 1 And Figure 2 As shown in the figure, the liquid injection pump includes a housing 1, a motor assembly, a first pump head assembly 2 and a second pump head assembly 3. The motor assembly is installed in the housing 1, the first pump head assembly 2 is fixedly installed on the left side of the housing 1, and the second pump head assembly 3 is fixedly installed on the right side of the housing 1.

[0030] In this embodiment, the motor assembly includes a motor body 4 and an output shaft 41 that penetrates the motor body 4 and can reciprocate axially along the motor body 4. It should be noted that the motor assembly is a conventional fixed screw stepper motor, and the output shaft 41 is essentially an axially movable screw. Those skilled in the art can easily understand the structure and working principle of the motor assembly.

[0031] In combination with Figure 3 The first pump head assembly 2 is arranged on the left side of the motor assembly, and the first pump head assembly 2 includes a first cylinder body 21 with a first inner cavity 20 and a first plunger 22 arranged in the first cylinder body 21. The first cylinder body 21 is also provided with a first liquid inlet 23 and a first liquid outlet 24 that are in communication with the first inner cavity 20.

[0032] In the embodiment, the first plunger 22 comprises a plunger head 221 which is arranged in the first inner cavity 20 to divide the first inner cavity 20 into a first cavity 61 and a second cavity 62, and the plunger head 221 is slidable along the axial direction of the first cylinder 21. The first pump head assembly 2 further comprises a first flow collecting member 81 which is fixedly arranged on the left side of the first cylinder 21, and a liquid inlet is formed on the first flow collecting member 81, and the first flow collecting member 81 is internally provided with a first flow collecting channel 83 which is in communication with the first liquid inlet 23, and the first flow collecting channel 83 is provided with a first branch 91 which is in communication with the first cavity 61 and a second branch 92 which is in communication with the second cavity 62, and the first branch 91 and the second branch 92 are both provided with a liquid inlet check valve 85. The first pump head assembly 2 further comprises a second flow collecting member 82 which is fixedly arranged on the right side of the first cylinder 21, and a liquid outlet is formed on the second flow collecting member 82, and the second flow collecting member 82 is internally provided with a second flow collecting channel 84 which is in communication with the first liquid outlet 24, and the second flow collecting channel 84 is provided with a third branch 93 which is in communication with the first cavity 61 and a fourth branch 94 which is in communication with the second cavity 62, and the third branch 93 and the fourth branch 94 are both provided with a liquid outlet check valve 86.

[0033] The working process of the first pump head assembly 2 is as follows: the plunger head 221 slides in the first inner cavity 20 along the axial direction of the first cylinder 21, when the plunger head 221 slides to the left, the volume of the first cavity 61 is reduced, the liquid outlet check valve 86 of the third branch 93 is opened (the liquid outlet check valve 86 of the fourth branch 94 is in a closed state), the fluid flows into the second flow collecting channel 84 through the third branch 93 and then flows out from the liquid outlet, thereby realizing liquid outlet, at the same time, the volume of the second cavity 62 is increased, the liquid inlet check valve 85 of the second branch 92 is opened (the liquid inlet check valve 85 of the first branch 91 is in a closed state), the fluid flows into the second cavity 62 through the first flow collecting channel 83 and the second branch 92 from the liquid inlet, thereby completing liquid inlet. Figure 3 When the plunger head 221 slides to the right, the volume of the first cavity 61 is increased, the volume of the second cavity 62 is reduced, the liquid outlet check valve 86 of the fourth branch 94 is opened (the liquid outlet check valve 86 of the third branch 93 is in a closed state), the fluid flows into the second flow collecting channel 84 through the fourth branch 94 and then flows out from the liquid outlet, thereby realizing liquid outlet, at the same time, the liquid inlet check valve 85 of the first branch 91 is opened (the liquid inlet check valve 85 of the second branch 92 is in a closed state), the fluid flows into the second cavity 62 through the first flow collecting channel 83 and the first branch 91 from the liquid inlet, thereby completing liquid inlet. Figure 3 The first pump head assembly 2 of the embodiment is provided with the first flow collecting member 81 and the second flow collecting member 82, so that the first pump head assembly 2 can simultaneously realize liquid inlet and liquid outlet, compared with the traditional liquid injection pump which can only realize liquid outlet or liquid inlet, the efficiency of liquid injection is greatly improved, and the problem of low efficiency of liquid injection in the past is solved.

[0034] See Figure 2The second pump head assembly 3 is arranged at the right side of the motor assembly, and comprises a second cylinder 31 with a second inner cavity 30 and a second plunger 32 arranged in the second cylinder 31. The second cylinder 31 is further provided with a second liquid inlet 33 and a second liquid outlet 34 in communication with the second inner cavity 30.

[0035] It should be noted that the structure and working principle of the second pump head assembly 3 are the same as those of the first pump head assembly 2, and the first and second flow combining assemblies are also provided, and the liquid outlet and liquid inlet can be simultaneously performed.

[0036] In the embodiment, the first plunger 22 is connected to one end of the output shaft 41 through the floating coupling 5, and the second plunger 32 is connected to the other end of the output shaft 41 through the floating coupling 5. Thus, the two pump head assemblies can be simultaneously driven to work through a single motor assembly. It can be understood that the first pump head assembly 2 and the second pump head assembly 3 are arranged as mirror images.

[0037] Please see Figure 4 The outer side of the floating connector is fixedly provided with a positioning sheet (not shown in the figure), and the inside of the shell 1 is fixedly provided with a limit position sensor 51 and an original point sensor 52 arranged at intervals. Specifically, the limit position sensor 51 and the original point sensor 52 are both photoelectric sensors, which are mainly used to feedback the position of the output shaft 41 to the external controller, so as to improve the liquid injection accuracy of the liquid injection pump.

[0038] As a preferred scheme, the first plunger 22 further comprises a plunger rod fixedly connected with the plunger head 221, and the plunger rod is connected with the end of the output shaft 41 through the floating coupling 5. Optionally, the plunger rod is of a ceramic structure, and the plunger head 221 is of 316L stainless steel. In addition, the first pump head assembly 2 further comprises a plunger sleeve 71 arranged on the inner side of the first inner cavity 20, and the plunger head 221 is sealingly attached to the inner wall of the plunger sleeve 71. The plunger sleeve 71 is of a ceramic structure, so that the liquid injection pump can be suitable for strong acid or alkaline use environment, and has the characteristics of corrosion resistance, oxidation resistance and long service life.

[0039] In the embodiment, the outer circumferential side of the plunger head 221 is provided with a sealing gasket 72, and the sealing gasket 72 is of a perfluoroether rubber. It should be noted that the structures inside the cylinder, such as the one-way valve, which need to be sealed, can be provided with corresponding sealing rings, and the sealing rings can be made of corrosion-resistant materials, so as to prolong the service life of the liquid injection pump.

[0040] The liquid injection pump of the embodiment can save the number of liquid injection pumps, reduce cost, improve economic benefits, simplify the structure of the liquid injection system, and solve the problems of complex structure and high manufacturing cost in the prior art by setting the first pump head assembly 2 and the second pump head assembly 3, which can be connected to two independent liquid injection systems respectively.

[0041] Compared with the prior art, the liquid injection pump of the embodiment has a simple and compact overall structure, adopts a motor with a through shaft, simplifies the structural layout of the liquid injection pump, reduces the volume of the liquid injection pump, has high stability and high liquid injection efficiency, and solves the problems of complex structure and poor liquid injection efficiency in the prior art.

[0042] Finally, it should be noted that: the high-efficiency numerical control liquid injection pump with double heads and bidirectional liquid output disclosed in the embodiments of the utility model is only a preferred embodiment of the utility model, and is used to illustrate the technical scheme of the utility model, but not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that; the technical scheme recorded in the foregoing embodiments can still be modified, or some technical features can be replaced; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the spirit and scope of the technical scheme of the embodiments of the utility model.

Claims

1. A double-head bidirectional liquid-outlet high-efficiency numerical control liquid injection pump, characterized in that, The utility model relates to a kind of pump head assembly and pump head assembly, comprising: Motor assembly, including motor body and output shaft that is axially reciprocated along the motor body and passes through the motor body; First pump head assembly is arranged on the left side of the motor assembly, and the first pump head assembly includes the first cylinder with first inner cavity and the first plunger inserted into the first cylinder, and the first cylinder is further provided with first liquid inlet and first liquid outlet communicated with the first inner cavity, and the first plunger is connected with one end of the output shaft; Second pump head assembly is arranged on the right side of the motor assembly, and the second pump head assembly includes the second cylinder with second inner cavity and the second plunger inserted into the second cylinder, and the second cylinder is further provided with second liquid inlet and second liquid outlet communicated with the second inner cavity, and the second plunger is connected with the other end of the output shaft.

2. The high-efficiency numerical control liquid injection pump with double heads and bidirectional liquid outlet according to claim 1, characterized in that, Further comprising a housing, the motor assembly is installed in the housing, the first pump head assembly is fixedly installed on the left side of the housing, and the second pump head assembly is fixedly installed on the right side of the housing.

3. The high-efficiency numerical control liquid injection pump with double heads and bidirectional liquid outlet according to claim 1, characterized in that, The output shaft is connected with the first plunger through a floating coupling.

4. The high-efficiency numerical control liquid injection pump with double heads and bidirectional liquid outlet according to claim 1, characterized in that, The output shaft is connected with the second plunger through a floating coupling.

5. The high-efficiency numerical control liquid injection pump with double heads and bidirectional liquid outlet according to claim 1, characterized in that, The first plunger includes plunger head, and the plunger head is inserted into the first inner cavity, so that the first inner cavity is divided into first cavity and second cavity, and the plunger head can slide along the axis of the first cylinder.

6. The high-efficiency numerical control liquid injection pump with double heads and bidirectional liquid outlet according to claim 5, characterized in that, The first pump head assembly further comprises a first current collector fixedly installed on the left side of the first cylinder, and the liquid inlet is formed on the first current collector, and the first current collector is internally provided with first current collector channel communicated with the first liquid inlet, and the first current collector channel is provided with first branch communicated with the first cavity and second branch communicated with the second cavity, and the first branch and the second branch are both provided with liquid inlet check valve.

7. The high-efficiency numerical control liquid injection pump with double heads and bidirectional liquid outlet according to claim 6, characterized in that, The first pump head assembly further comprises a second current collector fixedly installed on the right side of the first cylinder, and the liquid outlet is formed on the second current collector, and the second current collector is internally provided with second current collector channel communicated with the first liquid outlet, and the second current collector channel is provided with third branch communicated with the first cavity and fourth branch communicated with the second cavity, and the third branch and the fourth branch are both provided with liquid outlet check valve.

8. The high-efficient numerical control liquid injection pump with double-head and bidirectional liquid outlet according to claim 5, characterized in that, The first plunger further comprises plunger rod fixedly connected with the plunger head, and the plunger rod is of ceramic structure, and the plunger head is of 316L stainless steel.

9. The high-efficiency numerical control liquid injection pump with double heads and bidirectional liquid outlet according to claim 8, characterized in that, The first pump head assembly further comprises plunger sleeve sleeved on the inner side of the first inner cavity, and the plunger head is sealingly attached to the inner wall of the plunger sleeve, and the plunger sleeve is of ceramic structure.

10. The high-efficiency numerical control liquid injection pump with double heads and bidirectional liquid outlet according to claim 9, characterized in that, The outer circumferential side of the plunger head is provided with sealing gasket, and the sealing gasket is of perfluoroether rubber.

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