Injection type high-pressure plunger pump

Abstract

The utility model discloses an injection type high-pressure plunger pump, which relates to the technical field of plunger pump equipment and comprises a sliding component, a transmission component, a driving component, a pump head component and a transmitter component. The sliding assembly comprises a lead screw sliding table, a plunger rod supporting base and a plunger rod. The screw rod sliding table comprises a sliding block, a sliding rail and a transmission rod, and a plunger rod supporting seat is arranged on the sliding block; one end of the plunger rod is connected with the plunger rod supporting base through a fixing piece, and the other end of the plunger rod is connected with the pump head assembly. The driving assembly comprises a driving motor; the output end of the driving motor is connected with the transmission rod through a transmission assembly, the driving motor is started to drive the transmission rod to rotate, and the transmission rod rotates to drive the sliding block to move; the transmitter assembly comprises a pressure transmitter, a pressure transmitter base and a handle, and the pressure transmitter base is connected with the pump head assembly. According to the utility model, circular motion of the driving motor is converted into horizontal motion, so that the stroke range of the plunger rod is increased, and accurate feeding is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pump equipment, and particularly relates to an injection type high-pressure plunger pump. Background Art

[0002] A high-pressure plunger pump is a device that reciprocates a plunger rod in a cylinder to transport liquid. It is often widely used in occasions such as high-performance liquid chromatography and continuous liquid transportation. Currently, an electric motor is usually used to drive an eccentric wheel or a crankshaft to complete the movement of the plunger rod. However, this method will cause the stroke of the plunger rod to become shorter, resulting in a limited amount of liquid inhaled after each rotation. Especially when the liquid contains bubbles, the short stroke may not be sufficient to effectively discharge the bubbles, thus affecting the normal operation of the pump. At the same time, it will also cause the plunger rod to switch frequently, resulting in pressure fluctuations and accelerating the wear of the pump. Therefore, in the face of the existing problems, a new type of high-pressure plunger pump needs to be designed to achieve accurate and stable feeding. Summary of the Utility Model

[0003] The utility model aims at the problems existing in the prior art, such as short stroke of the plunger rod, frequent switching, inaccurate feeding, etc., and provides an injection type high-pressure plunger pump.

[0004] To achieve the above object, the technical scheme adopted by the utility model is as follows:

[0005] An injection type high-pressure plunger pump includes a sliding assembly, a transmission assembly, a driving assembly, a pump head assembly, a transmitter assembly and a bottom plate. The sliding assembly includes a screw slide table, a plunger rod support seat and a plunger rod. The screw slide table includes a slider, a slide rail and a transmission rod. The slider is installed on the slide rail, and the transmission rod is installed on the slider. A plunger rod support seat is provided on the slider. One end of the plunger rod is connected to the plunger rod support seat through a fixing member, and the other end of the plunger rod is connected to the pump head assembly. The sliding assembly is installed on the bottom plate. The driving assembly includes a driving motor. The output end of the driving motor is connected to the transmission rod through the transmission assembly. Starting the driving motor drives the transmission rod to rotate, and the rotation of the transmission rod drives the slider to move. The transmitter assembly includes a pressure transmitter, a pressure transmitter base and a handle. The pressure transmitter and the handle are respectively installed at both ends of the pressure transmitter base. The pressure transmitter base is connected to the pump head assembly.

[0006] Based on the above technical scheme, further, the driving assembly further includes a motor fixing plate, and one end of the driving motor is installed on the motor fixing plate.

[0007] Based on the above technical scheme, further, the pump head assembly includes a pump head and a first sealing ring. The first sealing ring is arranged inside the pump head. Among them, the first sealing ring is a pantograph sealing ring.

[0008] Based on the above technical scheme, further, the pump head is fixed to the bottom plate through a support fitting.

[0009] Based on the above technical solution, further, it further includes a seal ring baffle, the seal ring baffle is connected to the pump head, and the seal ring baffle seals the first seal ring inside the pump head, and the plunger rod passes through the seal ring baffle and the first seal ring and extends into the pump head.

[0010] Based on the above technical solution, further, a photoelectric switch light-shielding sheet is provided on the plunger rod support seat; a photoelectric switch is provided on the seal ring baffle.

[0011] Based on the above technical solution, further, the pump head is provided with a liquid outlet, the pressure transmitter base is provided with a liquid inlet, and the liquid outlet is communicated with the liquid inlet.

[0012] Based on the above technical solution, further, the transmitter assembly further includes a second seal ring, and the pressure transmitter is connected to the pressure transmitter base through the second seal ring. Among them, the second seal ring is an O-ring, and its material includes but is not limited to fluororubber, perfluoroether, modified perfluoroether, PTFE, etc.

[0013] Based on the above technical solution, further, the transmission assembly includes a synchronous pulley and a synchronous belt. The synchronous pulley includes a driving pulley and a driven pulley. The driving pulley is installed at the output end of the driving motor, and the driven pulley is installed at one end of the transmission rod. The driving pulley and the driven pulley are sleeved with the same synchronous belt. Among them, the ratio between the number of teeth of the driving pulley and the number of teeth of the driven pulley includes but is not limited to being within the range of 1:1 - 1:5.

[0014] Based on the above technical solution, further, the transmission assembly is a coupling, and the output end of the driving motor is connected to the transmission rod through the coupling.

[0015] Based on the above technical solution, further, one-way valves are respectively installed at the liquid inlet and the liquid outlet of the pump head.

[0016] Compared with the prior art, the present utility model has the following beneficial effects:

[0017] The present utility model uses a lead screw and slide table structure to replace the traditional cam or crankshaft, converts the circular motion of the driving motor into a horizontal motion, increases the stroke range of the plunger rod, avoids the influence of air bubbles in the pump head on the working conditions, and realizes accurate feeding; and by using the lead screw and slide table structure, the liquid holding volume of the pump head is increased, the influence of the frequent movement of the plunger rod in the pump head on the system pressure is avoided, and stable feeding is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the sliding assembly and the driving assembly horizontally arranged in parallel in Embodiment 1 of the present utility model;

[0019] Figure 2This is a schematic structural diagram of the present utility model with the sliding component and the driving component arranged vertically;

[0020] Figure 3 This is a schematic structural diagram of Embodiment 2 of the present utility model with the sliding component and the driving component connected by a coupling;

[0021] Reference numerals: 1, pump head; 2, left support plate; 3, sealing ring baffle; 4, light sensor light shielding sheet; 5, plunger rod support seat; 6, slide rail; 7, bottom plate; 8, motor fixing plate; 9, fixing screw; 10, driving motor; 11, plunger rod; 12, light sensor; 13, pressure transmitter; 14, right support plate; 15, pressure transmitter base; 16, handle; 17, synchronous belt; 18, cover plate; 19, fixed mounting plate; 20, liquid outlet; 21, liquid inlet interface; 22, transmission rod; 23, slider. Detailed implementation manners

[0022] The following further elaborates and explains the present utility model in conjunction with the drawings and specific implementation manners. The technical features of each implementation manner in the present utility model can be combined correspondingly without conflict.

[0023] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific implementation manners of the present utility model is provided in conjunction with the drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below. The technical features of each embodiment of the present utility model can be combined correspondingly without conflict.

[0024] In the description of the present utility model, it should be understood that when an element is considered to be "connected" to another element, it can be directly connected to the other element or indirectly connected, i.e., there is an intermediate element. On the contrary, when an element is referred to as being "directly" connected to another element, there is no intermediate element.

[0025] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features.

[0026] Embodiment 1

[0027] An injection type high-pressure plunger pump is implemented, which includes a sliding assembly, a transmission assembly, a driving assembly, a pump head 1 assembly, a transmitter assembly and a bottom plate 7; the sliding assembly includes a lead screw slide, a plunger rod support seat 5 and a plunger rod 11; the lead screw slide includes a slider 23, a slide rail 6 and a transmission rod 22, the slider 23 is installed on the slide rail 6, the slide rail 6 is installed on the bottom plate 7, and the transmission rod 22 is installed on the slider 23. Specifically, a fixed mounting plate 19 is provided at each end of the transmission rod 22, and both fixed mounting plates 19 are installed on the slide rail 6. A through hole is provided on each fixed mounting plate 19. One end of the transmission rod 22 serves as a power input end, and this power input end is connected to the driving assembly through the transmission assembly. The power input end of the transmission rod 22 passes through the through hole on the nearest fixed mounting plate 19, and the other end of the transmission rod 22 is located in the through hole of the other fixed mounting plate 19, and both ends of the transmission rod 22 can move freely in the two through holes, that is, rotate freely. A plunger rod support seat 5 is provided on the slider 23; one end of the plunger rod 11 is connected to the plunger rod support seat 5 through a fixing member, and the other end of the plunger rod 11 is connected to the pump head 1 assembly. Among them, the fixing member can be a component with a fixing function, such as a fixing screw 9; the driving assembly includes a driving motor 10 and a motor fixing plate 8. One end of the driving motor 10 is installed on the motor fixing plate 8, and the motor fixing plate 8 is installed on the bottom plate 7 or the slide rail 6. The driving of the driving motor 10 can be connected to an external control system through a wire and be controlled by the control system, or the motor can be started manually; the output end of the driving motor 10 is connected to the power input end of the transmission rod 22 through the transmission assembly. Starting the driving motor 10 drives the transmission rod 22 to rotate, and the slider 23 can move under the action of the transmission rod 22; the transmitter assembly includes a pressure transmitter 13, a pressure transmitter base 15 and a handle 16. The pressure transmitter 13 and the handle 16 are respectively installed at both ends of the pressure transmitter base 15. Among them, the pressure transmitter 13 is connected to an external control system through a wire, and the pressure transmitter 13 can convert the pressure into a pneumatic signal or an electric signal and transmit it to the control system. The control system is an existing conventional means, which refers to a management system composed of a control subject, a control object and a control medium and having its own goals and functions; the pressure transmitter base 15 is connected to the pump head 1 assembly. In addition, multiple other interfaces for emptying can be provided on the pressure transmitter base 15 for connecting other required components.

[0028] Specifically, the pump head 1 assembly includes a pump head 1 and a first sealing ring. The first sealing ring is arranged inside the pump head 1. The pump head 1 is fixed to the bottom plate 7 through a support fitting. The support fitting includes a left support plate 2 and a right support plate 14. The left support plate 2 is arranged on one side of the pump head 1, and the right support plate 14 is arranged on the other side of the pump head 1. The pump head 1 is fixed to the bottom plate 7 through the left support plate 2 and the right support plate 14. The injection type high-pressure plunger pump further includes a sealing ring baffle 3, which is connected to the pump head 1, installed on one side of the pump head 1, and the sealing ring baffle 3 seals the first sealing ring inside the pump head 1. The plunger rod 11 extends through the sealing ring baffle 3 and the first sealing ring into the pump head 1. An optoelectronic switch light-shielding piece 4 is further arranged on the plunger rod support seat 5; an optoelectronic switch 12 is arranged on the sealing ring baffle 3. The optoelectronic switch 12 can be connected to the control through a wire to achieve signal transmission. Herein, the optoelectronic switch 12 is short for an optoelectronic proximity switch, which utilizes the shielding or reflection of a light beam by a detected object to connect a circuit through a synchronous circuit, thereby detecting the presence or absence of an object. The pump head 1 is provided with a liquid outlet 20, and the pressure transmitter base 15 is provided with a liquid inlet. The liquid outlet 20 is communicated with the liquid inlet. The pump head 1 is further provided with a liquid inlet interface 21. A liquid inlet joint is arranged at the position of the liquid inlet interface 21, and a one-way valve is sealed inside the pump head 1 through the liquid inlet joint. Herein, the pump head 1 is provided with a liquid outlet 20, and another one-way valve is sealed inside the pump head 1 through a liquid outlet joint. The liquid inlet of the pressure transmitter base 15 is communicated with the liquid outlet 20 of the pump head 1 through a pipeline. The transmitter assembly further includes a second sealing ring. The pressure transmitter 13 is connected to the pressure transmitter base 15 through the second sealing ring. The first sealing ring is a pantograph seal ring, and the second sealing ring is an O-ring. The materials thereof include but are not limited to fluororubber, perfluoroether, modified perfluoroether, PTFE, etc.

[0029] The transmission assembly in this embodiment includes a synchronous pulley and a synchronous belt 17. The synchronous pulley includes a driving pulley and a driven pulley. The driving pulley is installed at the output end of the driving motor 10, and the driven pulley is installed at one end of the transmission rod 22. The same synchronous belt 17 is sleeved outside the driving pulley and the driven pulley. The ratio between the number of teeth of the driving pulley and the number of teeth of the driven pulley includes but is not limited to the range of 1:1 - 1:5. Among them, in combination Figure 1 and Figure 2 As shown, the installation positions of the driving assembly and the sliding assembly can be horizontally parallel to each other above the bottom plate 7; or the driving assembly can be installed above the sliding assembly, that is, the driving assembly and the sliding assembly are installed in parallel in the vertical direction. The specific installation positions can be set according to the actual situation.

[0030] The working principle of this structure is as follows: Start the driving motor 10. Through the action of the synchronous pulley and the synchronous belt 17, the transmission rod 22 is driven to move. The transmission rod 22 transmits the power to the slider 23, enabling the slider 23 to slide on the slide rail 6. The sliding of the slider 23 drives the plunger rod support seat 5 to move, and the light-switch shading piece 4 at the upper end of the plunger rod support seat 5 moves together. When the light-switch shading piece 4 moves to the position of the light switch 12, the slider 23 stops running and then moves reversely to the set position. By repeating the above process, the material transportation is completed.

[0031] Embodiment 2

[0032] Different from Embodiment 1, the transmission component in this embodiment is a coupling. The output end of the driving motor 10 is connected to the transmission rod 22 through the coupling. As shown in Figure 3 , a cover plate 18 is also provided at the upper end of the driving motor 10, and the position of the coupling is below the cover plate 18 (not marked in the figure). The other structures are exactly the same as those in Embodiment 1. The transmission method of its working principle is different from that in Embodiment 1, and the other principles are the same, so no more details will be described here. Further, the transmission component includes, but is not limited to, the embodiments of the synchronous pulley and the synchronous belt, and the coupling.

[0033] The working principle of this structure is as follows: Start the driving motor 10. Through the action of the coupling, the transmission rod 22 is driven to move. The coupling is arranged at one end of the transmission rod 22 and transmits the power to the slider 23, enabling the slider 23 to slide on the slide rail 6. The sliding of the slider 23 drives the plunger rod support seat 5 to move, and the light-switch shading piece 4 at the upper end of the plunger rod support seat 5 moves together. When the light-switch shading piece 4 moves to the position of the light switch 12, the slider 23 stops running and then moves reversely to the set position. By repeating the above process, the material transportation is completed.

[0034] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the protection scope of the present invention. Any simple modification or equivalent replacement made by those of ordinary skill in the art to the technical solution of the present invention shall not depart from the essence and scope of the technical solution of the present invention.

Claims

1. An injection type high pressure plunger pump, characterized in that: It includes a sliding assembly, a transmission assembly, a drive assembly, a pump head assembly, a transmitter assembly and a base plate; The sliding assembly includes a screw slide, a plunger rod support seat and a plunger rod; the screw slide includes a slider, a slide rail and a transmission rod, the slider is mounted on the slide rail, and the transmission rod is mounted on the slider; the slider is provided with a plunger rod support seat; one end of the plunger rod is connected to the plunger rod support seat through a fixing piece, and the other end of the plunger rod is connected to the pump head assembly; the sliding assembly is mounted on the bottom plate; The driving assembly includes a driving motor; the output end of the driving motor is connected to the driving rod through the transmission assembly, and the driving motor is started to drive the driving rod to rotate, and the rotation of the driving rod drives the slider to move; The transmitter assembly comprises a pressure transmitter, a pressure transmitter base and a handle. The pressure transmitter and the handle are respectively mounted at two ends of the pressure transmitter base; the pressure transmitter base is connected to the pump head assembly.

2. An injection type high pressure plunger pump according to claim 1, characterized in that: The driving assembly also includes a motor fixing plate, and one end of the driving motor is mounted on the motor fixing plate.

3. The injection type high pressure plunger pump according to claim 1, characterized in that: The pump head assembly comprises a pump head and a first sealing ring, wherein the first sealing ring is arranged inside the pump head, wherein the first sealing ring is a pan-seal sealing ring.

4. The injection type high pressure plunger pump according to claim 3, characterized in that: The pump head is fixed to the bottom plate via a supporting fitting.

5. The injection type high pressure plunger pump according to claim 3, characterized in that: It also includes a sealing ring baffle, which is connected to the pump head and seals the first sealing ring inside the pump head. The plunger rod passes through the sealing ring baffle and the first sealing ring and extends to the inside of the pump head.

6. The injection type high pressure plunger pump according to claim 5, characterized in that: A photoelectric switch shading sheet is arranged on the plunger rod support seat; a photoelectric switch is arranged on the sealing ring baffle.

7. The injection type high pressure plunger pump according to claim 3, characterized in that: The pump head is provided with a liquid outlet, the pressure transmitter base is provided with a liquid inlet, and the liquid outlet is communicated with the liquid inlet.

8. The injection type high pressure plunger pump according to claim 1, characterized in that: The transmitter assembly also includes a second sealing ring, and the pressure transmitter is connected to the pressure transmitter base via the second sealing ring, wherein the second sealing ring is an O-ring.

9. An injection type high pressure plunger pump according to any one of claims 1 to 8, characterized in that: The transmission assembly includes a synchronous wheel and a synchronous belt. The synchronous wheel includes a driving wheel and a driven wheel. The driving wheel is installed at the output end of the driving motor, and the driven wheel is installed at one end of the transmission rod. The driving wheel and the driven wheel are externally sleeved with the same synchronous belt.

10. An injection type high pressure plunger pump according to any one of claims 1 to 8, characterized in that: The transmission assembly is a coupling, and the output end of the drive motor is connected to the transmission rod through the coupling.

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