Inlet and outlet valve group of high-pressure extraction metering pump
Through the high-pressure extraction of the inlet and outlet valve group of the metering pump, the adjustment cover and spring-matched valve ball structure is adopted to solve the phase state changes and return problems caused by the pressure difference of the metering pump when transporting non-liquid media, and achieve stable control and precise adjustment of the medium pressure.
Patent Information
- Application Number
- CN202422243069.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-12
AI Technical Summary
When existing metering pumps convey non-liquid phase medium, the pressure difference between the two ends of the pump body leads to phase changes and return phenomena of the medium, and cannot effectively control the valve body opening and closing and internal pressure adjustment.
A high-pressure extraction metering pump inlet and outlet valve group is designed, including the pump body, infusion assembly and medium chamber. The adjustment cover and spring-matched valve ball structure are adopted. By adjusting the cover position, the spring presses on the valve ball to achieve stable control and adjustment of medium pressure.
It realizes pressure stability during medium transportation, avoids phase changes and reflux, meets the pressure requirements of different media, and improves the accuracy and flexibility of medium output.
Smart Images
Figure CN223062634U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of metering pump technology, and in particular to an inlet and outlet valve group of a high-pressure extraction metering pump. Background Art
[0002] Metering pumps, also known as quantitative pumps or proportional pumps, are special volumetric pumps that can meet the needs of various strict process flows. The flow rate can be adjusted steplessly within the range of 0-100% and is used to transport liquids. Metering pumps require the opening and closing of inlet and outlet check valves to achieve liquid suction and discharge. Metering pumps generally select the ball diameter of the check valve according to the flow rate. Small flow uses a small diameter ball, and large flow uses a larger diameter ball.
[0003] For some media that are normally non-liquid, when using a metering pump for transportation, the pressure difference at both ends of the pump body will cause the medium to change phase and flow back during transportation. Since the ball valve installed on the pump body cannot respond to the transportation of the medium, it often hinders the transportation of the medium. Utility Model Content
[0004] In order to improve the metering pump so that it can control the opening and closing of the valve body and adjust the pressure inside the valve body when the medium is transported, so as to avoid the situation where some media phase changes due to different pressures at the inlet and outlet positions of the pump body during the transportation process, the present application provides an inlet and outlet valve group of a high-pressure extraction metering pump.
[0005] The inlet and outlet valve groups of a high-pressure extraction metering pump provided in the present application adopt the following technical solutions:
[0006] The inlet and outlet valve groups of a high-pressure extraction metering pump include a pump body, infusion components symmetrically arranged on both sides of the pump body, and a medium cavity opened in the pump body, wherein the two infusion components are both connected to the medium cavity, the infusion component includes an infusion valve fixedly installed at one end of the pump body, a connecting sleeve threadedly sleeved on the end of the infusion valve away from the pump body, and a connecting pipe threadedly penetrated through the end of the connecting sleeve away from the infusion valve, a mounting groove is provided at the end of the infusion valve away from the pump body, an adjusting cover is threadedly penetrated in the mounting groove, a channel 1 and a channel 2 which are connected to each other and whose cross-sectional areas increase successively are penetrated through the adjusting cover along an axis, a spring which is always in a compressed state is fixedly arranged in the channel 1, a valve ball is slidably arranged in the channel 2, the end of the spring abuts against the valve ball, the cross-sectional area of the valve ball is larger than the cross-sectional area of the channel 1, and there is a gap between the valve ball and the inner side wall of the channel 2.
[0007] By adopting the above technical solution, the position of the adjusting cover located at the end of the infusion valve can be changed to change the extrusion force of the spring on the valve ball, so that the pressure of the medium during transportation in the pump body will not change, ensuring the stability of the medium during transportation. At the same time, the pressure of the medium at the outlet position of the pump body can be adjusted according to actual needs, so that the medium output from the pump body has the pressure required by the user. When there is no medium at the inlet or outlet end of the pump body, this design structure can also prevent the medium from being discharged from the pump body.
[0008] Optionally, the cross-section of the first channel is in the shape of an equilateral hexagon and is adapted to an internal hexagonal wrench.
[0009] By adopting the above technical solution, the internal hexagonal wrench extends into the connecting sleeve from the connection position between the connecting sleeve and the connecting pipe, and can adjust the position of the adjusting cover relative to the infusion valve, thereby adjusting the elastic extrusion force of the spring on the valve ball. The structure is simple and the adjustment operation is convenient.
[0010] Optionally, the connecting sleeve includes a first rotating cylinder located in the middle and second rotating cylinders symmetrically arranged at both axial ends of the first rotating cylinder. The first rotating cylinder is rotatably connected to the two second rotating cylinders, and the two second rotating cylinders are respectively threadedly sleeved with the infusion valve and the connecting pipe. A regulating screw disc is fixedly sleeved at the end of the adjusting cover away from the infusion valve, and the regulating screw disc is threadedly connected to the first rotating cylinder.
[0011] By adopting the above technical solution, the first rotating cylinder and the adjusting rod are threadedly connected together through the regulating screw disc, making it more convenient for the user to adjust the pressure of the spring on the valve ball. Only by rotating the first rotating cylinder can be done, avoiding the complex operation of disassembling the connecting pipe when changing the position of the adjusting cover, and improving the flexibility of the valve body operation.
[0012] Optionally, the end portions of the first rotating cylinder and the second rotating cylinder close to each other are respectively provided with a first docking groove and a second docking groove, and a sealing ring is jointly arranged in the first docking groove and the second docking groove, and both ends of the sealing ring are tightly abutted against the bottom of the first docking groove and the second docking groove.
[0013] By adopting the above technical solution, it can be avoided that when the medium moves between the infusion valve and the connecting sleeve, the air pressure at this place changes due to the gap between the first rotating cylinder and the second rotating cylinder, and further causes an error between the output medium and the preset pressure.
[0014] Optionally, the second channel includes a central hole coaxial with the first channel and a plurality of ear holes circumferentially and equally spacedly arranged on the edge of the central hole. The plurality of ear holes are all axially communicated with the central hole, and the valve ball is slidably fitted in the central hole.
[0015] By adopting the above technical solution, the medium can enter into the first channel from the side of the valve ball, avoiding the reduction of the medium delivery efficiency at this position due to the too large volume of the valve ball, eliminating the influence of the valve ball on the medium delivery speed, and enabling the valve ball to be more sensitive to the pressure of the medium, thereby improving the accuracy of the pressure of the medium output by the pump body.
[0016] In summary, the present application includes at least one of the following beneficial technical effects:
[0017] 1. The present application can adjust the pressure of the medium output by the metering pump to meet the requirements of different users for the pressure and phase state of different output media;
[0018] 2. The present application can maintain the stability of the pressure inside the metering pump body, ensuring that when there is a pressure difference between the inlet and outlet of the pump body, the medium located inside the pump body will not flow back;
[0019] 3. When adjusting the elastic squeezing force received by the valve ball and during the movement of the valve ball, the present application only controls the opening and closing of the valve ball for the medium channel, and will not affect the flow rate of the medium. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 is the overall cross-sectional view of the inlet and outlet valve group of a high-pressure extraction metering pump of the present application.
[0021] Figure 2 is Figure 1 the enlarged view of part A in
[0022] Figure 3 is the overall view of the infusion assembly in Embodiment 1 of the inlet and outlet valve group of a high-pressure extraction metering pump of the present application.
[0023] Figure 4 is the exploded view of the structure of the infusion assembly in Embodiment 1 of the inlet and outlet valve group of a high-pressure extraction metering pump of the present application.
[0024] Figure 5 is the overall front view of the adjustment cover of the inlet and outlet valve group of a high-pressure extraction metering pump of the present application.
[0025] Figure 6 is the overall bottom view of the adjustment cover of the inlet and outlet valve group of a high-pressure extraction metering pump of the present application.
[0026] Figure 7 is the overall view of the infusion assembly of Embodiment 2 of the inlet and outlet valve group of a high-pressure extraction metering pump of the present application.
[0027] Figure 8 is Figure 7 the cross-sectional view taken along line A-A in
[0028] Figure 9 It is an exploded view of the structure of the connecting sleeve in the second embodiment of the inlet and outlet valve group of a high-pressure extraction metering pump of the present application.
[0029] Explanation of reference numerals: 1, pump body; 11, feed port; 12, discharge port; 13, medium chamber; 2, infusion assembly; 21, liquid outlet valve; 211, installation groove; 22, connecting sleeve; 221, first rotating cylinder; 2211, first docking groove; 222, second rotating cylinder; 2221, second docking groove; 23, connecting pipe; 3, adjusting cover; 31, first channel; 32, second channel; 321, central hole; 322, ear hole; 4, valve ball; 5, spring; 6, adjusting screw disc; 7, sealing ring. Specific embodiments
[0030] The following is a further detailed description of the present application in conjunction with the attached Figures 1-9 drawings.
[0031] The embodiment of the present application discloses an inlet and outlet valve group of a high-pressure extraction metering pump.
[0032] Embodiment 1
[0033] Referring to Figure 1 and Figure 2 , an inlet and outlet valve group of a high-pressure extraction metering pump includes a pump body 1 of the metering pump, two infusion assemblies 2 symmetrically and fixedly installed at the positions of the feed port 11 and the discharge port 12 on both sides of the metering pump, and a medium chamber 13 opened inside the pump body 1. The feed port 11 and the discharge port 12 on the pump body 1 are both communicated with the medium chamber 13 inside the pump body 1. Among them, the infusion assembly 2 specifically includes an infusion valve fixedly installed at the position of the feed port 11 or the discharge port 12 of the pump body 1, a connecting sleeve 22 threadedly sleeved at one end of the infusion valve away from the pump body 1, and a connecting pipe 23 threadedly penetrating through one end of the connecting sleeve 22 away from the infusion valve. The connecting pipe 23 is connected to an external input device or an output receiving device.
[0034] Referring to Figure 3 and Figure 4 , further, an installation groove 211 with internal threads provided on the side wall is opened at one end of the infusion valve away from the pump body 1. An adjusting cover 3 is threadedly inserted into the installation groove 211, and the adjusting cover 3 can move along the axis direction of the installation groove 211. The adjusting cover 3 is provided with a first channel 31 and a second channel 32 that communicate with each other. The distance between the first channel 31 and the end of the infusion valve is greater than the distance between the second channel 32 and the infusion valve. The cross-sectional area of the first channel 31 is smaller than the cross-sectional area of the second channel 32, and a valve ball 4 for blocking the flow of the medium by sliding is slidably arranged in the second channel 32, and there is a gap between the valve ball 4 and the inner side wall of the second channel 32.
[0035] Referring to Figure 2 and Figure 4, Further, a spring 5 is fixedly sleeved in the first channel 31. The end of the spring 5 extends into the second channel 32 and always abuts against the valve ball 4. While restricting the movement of the valve ball 4, it can also play a role in limiting the valve ball 4 radially along the second channel 32. The spring 5 is always in a compressed state. When the adjusting cover 3 moves along the axis of the infusion valve, the elastic squeezing force of the spring 5 on the valve ball 4 can be adjusted.
[0036] Refer to Figure 5 , Specifically, the cross-section of the first channel 31 is in the shape of an equilateral hexagon and is adapted to an internal hexagonal wrench. When it is necessary to adjust the distance between the adjusting cover 3 and the end of the infusion valve, only the connecting pipe 23 needs to be removed, and the wrench is inserted into the first channel 31, and then the adjusting cover 3 can be rotated and adjusted. The operation is simple, which simplifies the adjusting structure.
[0037] Refer to Figure 6 , Specifically, the second channel 32 includes a central hole 321 and a plurality of ear holes 322 that are axially connected to each other. Among them, the central hole 321 is coaxial with the first channel 31, and the plurality of ear holes 322 are equally spaced along the circumferential direction of the central hole 321. The plurality of ear holes 322 are all axially connected to the central hole 321. The edge of the valve ball 4 extends into the ear holes 322, but there is a gap between the edge of the valve ball 4 and the edge of the ear holes 322, so that the medium can smoothly enter the first channel 31 from the ear holes 322.
[0038] This design can ensure that the valve ball 4 will not affect the flow of the medium during the sliding process, but only control the opening and closing of the medium channel between the infusion valve and the adjusting cover 3.
[0039] Optionally, scale lines are drawn along the axis on the side wall of the adjusting cover 3 to help the user finely adjust the adjusting cover 3. Since the scale lines specifically need to be determined comprehensively according to the adjustable stroke of the adjusting cover 3 and the pressure range that the user needs to adjust, this feature is not shown separately in the drawings of this application.
[0040] The implementation principle of the inlet and outlet valve group of a high-pressure extraction metering pump in the first embodiment of this application is as follows:
[0041] By inserting an internal hexagonal wrench from the position of the connecting pipe 23 into the first channel 31 with an internal hexagonal cross-section on the adjusting cover 3 located in the connecting sleeve 22 and rotating it, the distance between the adjusting cover 3 and the end of the infusion valve can be changed. This structure can change the elastic squeezing force of the spring 5 on the valve ball 4 to obtain the required medium output pressure.
[0042] At the same time, when this structure is located at the feed port 11 on the pump body 1, it can prevent the medium from flowing back.
[0043] Embodiment 2
[0044] Refer toFigure 7 and Figure 8 The connecting sleeve 22 includes a first rotating cylinder 221 located in the middle and two second rotating cylinders 222 that are coaxially symmetrically rotatably arranged at both ends of the first rotating cylinder 221. The two second rotating cylinders 222 are respectively threadedly sleeved with the infusion valve and the connecting pipe 23. A regulating screw disc 6 is fixedly sleeved at one end of the regulating cover 3 away from the infusion valve, and the first rotating cylinder 221 is threadedly connected to the regulating screw disc 6. When the first rotating cylinder 221 rotates, the regulating cover 3 can move along the axis under the drive of the first rotating cylinder 221.
[0045] Referring to Figure 8 and Figure 9 Furthermore, docking grooves 2211 and 2221 are respectively formed at the ends of the first rotating cylinder 221 and the second rotating cylinder 222 that are close to each other. A sealing ring 7 is installed in the docking grooves 2211 and 2221 together. Both axial ends of the sealing ring 7 are tightly abutted against the docking grooves 2211 and 2221, which can completely seal the space in the connection groove and prevent the phase change of the medium at this position.
[0046] The implementation principle of the inlet and outlet valve group of the high-pressure extraction metering pump in the second embodiment of the present application is as follows:
[0047] By rotating the first rotating cylinder 221 to drive the regulating cover 3 to move along the axis, it is convenient for the user to adjust the regulating cover 3 in real time, avoiding the situation where the connecting pipe 23 needs to be removed and external tools are required to adjust the position of the regulating cover 3, and simplifying the operation steps.
[0048] The main difference between the second embodiment and the first embodiment of the present application lies in the improvement of the structure of the connecting sleeve 22 and the adjustment method of the regulating cover 3. The implementation principles of other structures are the same as those of the first embodiment.
[0049] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.
Claims
1. An inlet and outlet valve group of a high-pressure extraction metering pump, comprising a pump body (1), infusion assemblies (2) symmetrically arranged on both sides of the pump body (1), and a medium chamber (13) formed inside the pump body (1). Both of the infusion assemblies (2) are communicated with the medium chamber (13). The infusion assembly (2) includes an infusion valve fixedly installed at one end of the pump body (1), a connecting sleeve (22) threadedly sleeved at the end of the infusion valve away from the pump body (1), and a connecting pipe (23) threadedly penetrating through the end of the connecting sleeve (22) away from the infusion valve. It is characterized in that: One end of the infusion valve away from the pump body (1) is provided with an installation groove (211). An adjusting cover (3) is threadedly inserted into the installation groove (211). The adjusting cover (3) is axially provided with a first channel (31) and a second channel (32) that are communicated with each other and have gradually increasing cross-sectional areas. A spring (5) that is always in a compressed state is fixedly arranged in the first channel (31). A valve ball (4) is slidably arranged in the second channel (32). The end of the spring (5) abuts against the valve ball (4). The cross-sectional area of the valve ball (4) is larger than that of the first channel (31), and there is a gap between the valve ball (4) and the inner side wall of the second channel (32).
2. The inlet and outlet valve group of a high-pressure extraction metering pump according to claim 1, characterized in that: The cross-section of the first channel (31) is in the shape of an equilateral hexagon and is adapted to an internal hexagonal wrench.
3. The inlet and outlet valve group of a high-pressure extraction metering pump according to claim 1, characterized in that: The connecting sleeve (22) includes a first rotating cylinder (221) in the middle and second rotating cylinders (222) symmetrically arranged at both axial ends of the first rotating cylinder (221). The first rotating cylinder (221) is rotatably connected to the two second rotating cylinders (222). The two second rotating cylinders (222) are respectively threadedly sleeved with the infusion valve and the connecting pipe (23). An adjusting screw disc (6) is fixedly sleeved at one end of the adjusting cover (3) away from the infusion valve, and the adjusting screw disc (6) is threadedly connected to the first rotating cylinder (221).
4. The inlet and outlet valve group of a high-pressure extraction metering pump according to claim 3, characterized in that: Docking grooves one (2211) and two (2221) are respectively opened at the end portions of the first rotating cylinder (221) and the second rotating cylinders (222) close to each other. A sealing ring (7) is jointly arranged in the docking groove one (2211) and the docking groove two (2221). Both ends of the sealing ring (7) are tightly abutted against the bottom of the docking groove one (2211) and the docking groove two (2221).
5. The inlet and outlet valve group of a high-pressure extraction metering pump according to claim 1, characterized in that: The second channel (32) includes a central hole (321) coaxial with the first channel (31) and a plurality of ear holes (322) circumferentially and equally spaced on the edge of the central hole (321). The plurality of ear holes (322) are axially communicated with the central hole (321). The valve ball (4) is slidably fitted in the central hole (321).