Metering pump

Abstract

The utility model discloses a metering pump and relates to the technical field of pumps, the metering pump comprises a pump body, a ceramic core, a butt joint seat and a driving part, one end of the butt joint seat is in butt joint with the end, provided with a pumping cavity, of the pump body, the ceramic core penetrates through the inner space of the butt joint seat and then is in clearance fit with the pumping cavity, the ceramic core is sleeved with a first sealing piece, and the first sealing piece is in clearance fit with the pumping cavity. The first sealing piece is embedded in an opening of the pumping cavity, a second sealing piece is arranged between the ceramic core and the butt-joint base, the driving part installed at the other end of the butt-joint base comprises a motor and a driving structure, the driving structure is in transmission connection with the ceramic core, and the ceramic core is in transmission connection with the butt-joint base. The motor drives the ceramic core to do linear reciprocating motion through the driving structure, and a liquid drainage flow channel is formed in the butt joint position of the butt joint base and the pump body. According to the metering pump, the liquid leakage condition can be found in time, liquid leakage is prevented from affecting the pumping precision, and exposed liquid can be prevented from permeating into a transmission structure to affect transmission.

Description

Technical Field

[0001] The present application relates to the technical field of pumps, and in particular to a metering pump. Background Art

[0002] In the production process of batteries, chemicals, food, electronic products, biological reagents and other products, the production processes such as fluid packaging and canning require the use of precise metering injection pumps to measure the fluid; the existing metering pumps have been improved to pump liquids through a motor plus a ceramic core structure. Although the injection volume is more accurate than the traditional piston pumping method, the leakage is also more serious. Long-term leakage can easily lead to inaccurate pumping accuracy, and the leaked liquid can easily flow to the transmission structure and cause transmission failure. Utility Model Content

[0003] The present application aims to solve at least one of the above technical problems in the prior art to a certain extent. To this end, the present application provides a metering pump that can detect leakage in time to prevent leakage from affecting pumping accuracy and prevent the exposed liquid from penetrating into the transmission structure to affect transmission.

[0004] The metering pump described in the embodiment of the present application includes a pump body, a ceramic core, a docking seat and a driving part, one end of the docking seat is docked with the end of the pump body where a pumping chamber is provided, the ceramic core passes through the internal space of the docking seat and fits with the gap of the pumping chamber, a first seal is sleeved on the ceramic core, the first seal is embedded in the open part of the pumping chamber, a second seal is arranged between the ceramic core and the docking seat, the driving part installed at the other end of the docking seat includes a motor and a driving structure, the driving structure is transmission-connected to the ceramic core, the motor drives the ceramic core to perform linear reciprocating motion through the driving structure, wherein a drainage channel is arranged at the docking point between the docking seat and the pump body.

[0005] According to the metering pump described in the embodiment of the present application, the end of the docking seat that docks with the pump body is provided with a first protrusion, the end of the pump body where the pumping chamber is provided is provided with adjacent first embedding groove and second embedding groove, the first sealing member is embedded in the first embedding groove, and after the docking seat is docked with the pump body, the first protrusion is embedded in the second embedding groove and abuts against the first sealing member.

[0006] According to the metering pump described in the embodiment of the present application, the middle part of the docking seat is hollowed out, and the end face where the docking seat and the pump body are docked is provided with a leakage groove extending to border the hollow part of the docking seat, so that the drainage channel is formed after the docking of the docking seat and the pump body.

[0007] According to the metering pump described in the embodiment of the present application, the driving structure includes a connecting seat and a conversion component, the conversion component is arranged in the connecting seat, one end of the connecting seat is connected to the docking seat, the motor is fixed to the other end of the connecting seat, one end of the conversion component is fixedly connected to the motor, and the other end of the conversion component is connected to the ceramic core, and the conversion component is used to convert the rotation of the motor into reciprocating linear motion of the ceramic core.

[0008] According to the metering pump described in the embodiment of the present application, the conversion component includes a screw and an actuator, the actuator is slidably arranged in the connecting seat, the screw is inserted in the actuator, and the screw nut of the screw is fixedly connected to one end of the actuator, the other end of the actuator is connected to the ceramic core, and the input end of the screw is connected to the output shaft of the motor through a coupling.

[0009] According to the metering pump described in the embodiment of the present application, the connecting seat is provided with a cavity for the actuator to move, guide members are provided on both sides of the cavity, and sliders extending to cooperate with the guide members are respectively provided on both sides of the actuator, and the sliders cooperate with the guide members to enable the actuator to slide along the axial direction of the connecting seat.

[0010] According to the metering pump described in the embodiment of the present application, a slide groove is arranged in the guide member, and the sliding block includes a rotating shaft arranged along the axial direction of the actuator and a guide bearing rotatably arranged on the rotating shaft, and the guide bearing is clearance-matched with the slide groove.

[0011] According to the metering pump described in the embodiment of the present application, the end of the actuator is connected to the ceramic core via a floating joint, and the surface of the ceramic core is mirror-finished.

[0012] According to the metering pump described in the embodiment of the present application, a fixing seat for mounting the motor is provided on the connecting seat, an angular contact bearing is provided on the fixing seat, the output shaft is plug-connected to the angular contact bearing, and the coupling is against the angular contact bearing.

[0013] According to the metering pump described in the embodiment of the present application, the end of the docking seat away from the pump body is provided with a second protrusion and a third embedding groove for embedding the second sealing member, and the connecting seat is provided with a fourth embedding groove. After the second protrusion is embedded in the fourth embedding groove, the docking seat abuts against the third embedding groove.

[0014] The above-mentioned metering pump has at least the following beneficial effects: when in use, the motor rotates, and the rotation of the motor is converted into the reciprocating motion of the ceramic core through the driving structure. The first sealing member is set so that when the ceramic core moves back and forth in the pumping chamber, the pumping chamber produces a suction or pumping action of liquid. The use of the motor in conjunction with the driving structure greatly improves the pumping accuracy of the metering pump of the present application. Compared with the existing metering pump, the present application adds a docking seat, and the docking seat cooperates with the setting of the second sealing member to support the ceramic core, and can also make the liquid flowing out of the ceramic core be intercepted and scraped off by the second sealing member when the sealing of the first sealing member fails, so as to avoid the leaked liquid extending to the driving part through the docking seat and affecting the transmission efficiency. At the same time, due to the existence of the drainage channel, the leaked liquid flows out from the drainage channel, so that the leakage is discovered in time, avoiding the leakage affecting the pumping accuracy, and also enabling timely maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present application is further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 This is a schematic diagram of the structure of the embodiment of the present application. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the embodiment of the present application. Figure 2 ;

[0018] Figure 3 yes Figure 2 The cross-sectional view along the AA direction;

[0019] Figure 4 This is a schematic diagram of the structure of the embodiment of the present application. Figure 3 ;

[0020] Figure 5 It is a cross-sectional view along the BB direction in 4;

[0021] Figure 6 yes Figure 4 Cross-sectional view along CC direction;

[0022] Figure 7 is a schematic structural diagram of a connecting socket in an embodiment of the present application;

[0023] Figure 8 This is a schematic diagram of the structure of the docking seat in the embodiment of the present application. Figure 1 ;

[0024] Fig. 9 This is a schematic diagram of the structure of the docking seat in the embodiment of the present application. Figure 2 ;

[0025] Fig.10 This is a schematic diagram of the structure of the pump body in the embodiment of the present application. Figure 1 ;

[0026] Fig.11 This is a schematic diagram of the structure of the pump body in the embodiment of the present application. Figure 2 ;

[0027] Fig.12 It is a structural schematic diagram of the shunt seat in the embodiment of the present application. DETAILED DESCRIPTION

[0028] This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0029] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0032] Reference Figures 1 to 5 The metering pump provided in the embodiment of the present application includes a pump body 300, a ceramic core 700, a docking seat 200 and a driving part.

[0033] Among them, one end of the docking seat 200 is docked with the end of the pump body 300 where the pumping chamber 310 is provided. After the ceramic core 700 passes through the internal space of the docking seat 200, it is gap-matched with the pumping chamber 310. A first seal 320 is sleeved on the ceramic core 700, and the first seal 320 is embedded in the open part of the pumping chamber 310. A second seal 210 is arranged between the ceramic core 700 and the docking seat 200. The driving part installed at the other end of the docking seat 200 includes a motor 600 and a driving structure. The driving structure is transmission-connected to the ceramic core 700. The motor 600 drives the ceramic core 700 to perform linear reciprocating motion through the driving structure. Among them, a drainage channel 220 is arranged at the docking point between the docking seat 200 and the pump body 300.

[0034] When in use, the motor 600 rotates, and the rotation of the motor 600 is converted into the reciprocating motion of the ceramic core 700 through the driving structure. The first sealing member 320 is set so that when the ceramic core 700 moves back and forth in the pumping chamber 310, the pumping chamber 310 produces a suction or pumping action of liquid. The use of the motor 600 in conjunction with the driving structure greatly improves the pumping accuracy of the metering pump of the present application. Compared with the existing metering pump, the present application adds a docking seat 200. The docking seat 200 cooperates with the setting of the second sealing member 210 to support the ceramic core 700, and can also make the liquid flowing out of the ceramic core 700 be intercepted and scraped off by the second sealing member 210 when the first sealing member seal 320 fails, so as to avoid the leaked liquid extending to the driving part through the docking seat 200 to affect the transmission efficiency. At the same time, due to the existence of the liquid discharge channel 220, the leaked liquid flows out from the liquid discharge channel 220, so that the leakage is discovered in time, so as to avoid the liquid leakage affecting the pumping accuracy, and also enable timely maintenance.

[0035] Specifically, Figure 5 As shown, one end of the pump body 300 of the present application is provided with a pumping chamber 310, and the other end is provided with a diverter seat 400 and an electromagnetic diaphragm valve 440. Further, as Fig.10 and Fig.11 As shown, the bottom of the pumping chamber 310 is provided with a liquid outlet 302 connected to the other end of the pump body 300; Figure 6 and Fig.12 As shown, a first diverter channel 401, a second diverter channel 402 and a third diverter channel 403 are provided in the diverter seat 400; one end of the first diverter channel 401 is connected to a liquid inlet connector 410, and the other end is connected to a liquid inlet end of the electromagnetic diaphragm valve 440; one end of the second diverter channel 402 is connected to the other liquid inlet end of the electromagnetic diaphragm valve 440, and the other end of the second diverter channel 402 is connected to the pumping chamber 310 through the liquid outlet hole 302; one end of the third diverter channel 403 is connected to the liquid outlet end of the electromagnetic diaphragm valve 440, and the other end is provided with a liquid outlet connector 420.

[0036] Specifically, the electromagnetic diaphragm valve 440 is used to switch the pumping chamber 310 to communicate with the liquid inlet connector 410 or the liquid outlet connector 420, and the motor 600 rotates. The rotation of the motor 600 is converted into the reciprocating motion of the ceramic core 700 through the driving structure. When the pumping chamber 310 is absorbing liquid, the electromagnetic diaphragm valve 440 connects the pumping chamber 310 with the liquid inlet connector 410, and the ceramic core 700 moves toward the bottom away from the pumping chamber 310, and the volume in the pumping chamber 310 increases, thereby generating a negative pressure to achieve the suction of the liquid delivered from the liquid inlet connector 410 into the pumping chamber 310; when the pumping chamber 310 pumps liquid, the electromagnetic diaphragm valve 440 connects the pumping chamber 310 with the liquid outlet connector 420, and the ceramic core 700 moves toward the bottom close to the pumping chamber 310, and the volume in the pumping chamber 310 is compressed, so that the liquid in the pumping chamber 310 can be discharged from the liquid outlet connector 420. In the embodiment of the present application, the rotation angle is controlled by the motor 600 to achieve the control of the displacement of the ceramic core 700, and then the suction and pumping volume in the pumping chamber 310 can be controlled to achieve accurate metering of the liquid; and the electromagnetic diaphragm valve 440 is used instead of the one-way valve to realize the conversion of the liquid inlet and liquid outlet liquid paths, thereby improving the metering pump's ability to resist interference from impurities and particles.

[0037] In some embodiments, Figures 8 to 10 As shown, the end of the docking seat 200 docking with the pump body 300 is provided with a first protruding end 203, and the end of the pump body 300 provided with the pumping chamber 310 is provided with adjacent first embedding grooves 301 and second embedding grooves 303. Specifically, as shown in FIG. Figure 5 As shown, the first sealing member 320 is embedded in the first embedding groove 301. After the docking seat 200 is docked with the pump body 300, the first protruding end 203 is embedded in the second embedding groove 303 and abuts against the first sealing member 320. The fast positioning docking of the docking seat 200 and the pump body 300 is achieved by the engagement of the first protruding end 203 with the second embedding groove 303, which is convenient for subsequent fast installation and maintenance. In addition, the first sealing member 320 can also be quickly installed in conjunction with the first embedding groove 301. After the docking seat 200 is docked with the pump body 300, the first protruding end 203 is in a position to abut against the first sealing member 320. Since the first sealing member 320 is made of elastic sealing materials such as rubber, the sealing performance of the first sealing member 320 can be further improved, so that the first sealing member 320 tightly covers the ceramic core 700.

[0038] Further, such as Figure 8 and Fig. 9As shown, the middle part of the docking seat 200 is hollowed out to allow the ceramic core 700 to pass through, and the end face where the docking seat 200 and the pump body 300 are docked is provided with a leakage groove 201 extending to border the hollow part of the docking seat 200, so that a drainage channel 220 is formed after the docking of the docking seat 200 and the pump body 300. The setting of the leakage groove 201 will not cause the leaked liquid to accumulate at the docking point between the docking seat 200 and the pump body 300, so that the leakage can be discovered and repaired in time.

[0039] In some embodiments, Figure 3 and Figure 5 As shown, the driving structure includes a connection seat 100 and a conversion member. The conversion member is arranged in the connection seat 100, which can further reduce the volume of the entire metering pump, so that the entire metering pump can be made more compact. Further, one end of the connection seat 100 is connected to the docking seat 200, the motor 600 is fixed to the other end of the connection seat 100, one end of the conversion member is fixedly connected to the motor 600, and the other end of the conversion member is connected to the ceramic core 700. The conversion member is used to convert the rotation of the motor 600 into the reciprocating linear motion of the ceramic core 700.

[0040] In some embodiments, the end of the docking seat 200 away from the pump body 300 is provided with a second protruding end 204 and a third embedding groove 202 for embedding the second sealing member 210, and the connecting seat 100 is provided with a fourth embedding groove. After the second protruding end 204 is embedded in the fourth embedding groove, the docking seat 200 abuts against the third embedding groove 202. The fourth embedding groove and the second protruding end 204 cooperate to achieve rapid positioning and docking of the docking seat 200 and the connecting seat 100, which is conducive to improving the installation speed. After the docking seat 200 and the connecting seat 100 are docked and installed, the connecting seat 100 abuts against the ceramic core 700, which enables the second sealing member 210 to firmly clamp the ceramic core 700, further improving the sealing effect.

[0041] Specifically, Figure 3 As shown, the conversion member includes a screw 800 and an actuator 130, the actuator 130 is slidably disposed in the connection seat 100, the screw 800 is inserted in the actuator 130, and the screw nut 810 of the screw 800 is fixedly connected to one end of the actuator 130, the other end of the actuator 130 is connected to the ceramic core 700, and the input end of the screw 800 is connected to the output shaft of the motor 600 through the coupling 170. The rotation of the actuator 130 is limited by the connection seat 100 and the actuator 130 can slide along the axial direction of the connection seat 100, so that the motor 600 can drive the actuator 130 to perform linear reciprocating motion through the screw 800, and thus the actuator 130 is connected to the ceramic core 700, so that the ceramic core 700 can be driven to perform linear reciprocating motion in the pumping chamber 310.

[0042] In some embodiments, Figure 7As shown, the connecting seat 100 is provided with a cavity 101 for the actuator 130 to move, and guide members 120 are provided on both sides of the cavity 101. Specifically, fixing grooves 102 are provided on both sides of the cavity 101, and the guide members 120 are embedded in the fixing grooves 102, and the guide members 120 are reinforced by adding bolts; sliders extending to cooperate with the guide members 120 are respectively provided on both sides of the actuator 130, and the sliders cooperate with the guide members 120 to enable the actuator 130 to slide along the axial direction of the connecting seat 100, so that under the action of the motor 600 and the screw rod 800, the actuator 130 can perform linear reciprocating motion, wherein a notch 103 for installing an origin sensor 180 is also provided on the connecting seat 100, and an induction sheet is provided on the actuator 130, and the origin sensor 180 determines whether the actuator 130 returns to the origin by detecting the induction sheet.

[0043] Furthermore, a slide groove 121 is provided in the guide member 120, and the slider includes a rotating shaft 132 provided along the axial direction of the actuator 130 and a guide bearing 133 rotatably provided on the rotating shaft 132, and the guide bearing 133 is clearance-matched with the slide groove 121. The above design can make the actuator 130 perform linear reciprocating motion. The present application replaces the conventional guide rail or linear bearing guide method by a rolling bearing plus a slide groove 121 guide structure, thereby reducing the installation space and the volume and size of the metering pump.

[0044] In a preferred embodiment, Figure 3 and Figure 5 As shown, the end of the actuator 130 is connected to the ceramic core 700 through a floating joint 720, so as to avoid the force not acting in the axial direction of the ceramic core 700 during the transmission process, which may cause the sealing failure of the first seal 320 and increase the friction. The mirror treatment of the surface of the ceramic core 700 can also further reduce the friction and reduce the probability of impurities. In some embodiments, in order to facilitate the docking of the floating joint 720 and the actuator 130 and reduce the processing difficulty of the actuator 130, an additional connection block 131 can be provided. The connection block 131 is connected to the floating joint 720 by bolts, and the connection block 131 is connected to the actuator 130 by threads, so that the overall installation and disassembly are very convenient.

[0045] In some other embodiments, the connection seat 100 is provided with a fixing seat 150 for mounting the power supply machine 600, the fixing seat 150 is provided with an angular contact bearing 160, the output shaft is plugged and connected to the angular contact bearing 160, and the coupling 170 abuts against the angular contact bearing 160. The angular contact bearing 160 is added, and the coupling 170 abuts against the angular contact bearing 160 when installed, so as to avoid the pressure from acting on the motor 600 through the screw rod 800 and the coupling 170 when the metering pump is filling liquid, so as to cause the motor 600 to be damaged by force.

[0046] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A metering pump, characterized in that: The invention comprises a pump body (300), a ceramic core (700), a docking seat (200) and a driving part, wherein one end of the docking seat (200) is docked with an end of the pump body (300) provided with a pumping chamber (310), the ceramic core (700) passes through the internal space of the docking seat (200) and is gap-matched with the pumping chamber (310), the ceramic core (700) is sleeved with a first sealing member (320), and the first sealing member (320) is embedded in the open portion of the pumping chamber (310). A second sealing member (210) is provided between the ceramic core (700) and the docking seat (200); the driving unit installed at the other end of the docking seat (200) comprises a motor (600) and a driving structure; the driving structure is connected to the ceramic core (700) in a transmission manner; the motor (600) drives the ceramic core (700) to perform linear reciprocating motion via the driving structure; and a liquid discharge channel (220) is provided at the docking point between the docking seat (200) and the pump body (300).

2. The metering pump according to claim 1, characterized in that: The end of the docking seat (200) docking with the pump body (300) is provided with a first protruding end (203); the end of the pump body (300) provided with the pumping chamber (310) is provided with adjacent first embedding grooves (301) and second embedding grooves (303); the first sealing member (320) is embedded in the first embedding groove (301); after the docking seat (200) and the pump body (300) are docked, the first protruding end (203) is embedded in the second embedding groove (303) and abuts against the first sealing member (320).

3. The metering pump according to claim 2, characterized in that: The middle portion of the docking seat (200) is hollowed out, and the end surface where the docking seat (200) and the pump body (300) are docked is provided with a drainage groove (201) extending to border the hollowed-out portion of the docking seat (200), so that the drainage channel (220) is formed after the docking of the docking seat (200) and the pump body (300).

4. The metering pump according to claim 1, characterized in that: The driving structure comprises a connecting seat (100) and a conversion component, wherein the conversion component is arranged in the connecting seat (100), one end of the connecting seat (100) is connected to the docking seat (200), the motor (600) is fixed to the other end of the connecting seat (100), one end of the conversion component is fixedly connected to the motor (600), and the other end of the conversion component is connected to the ceramic core (700), and the conversion component is used to convert the rotation of the motor (600) into reciprocating linear motion of the ceramic core (700).

5. The metering pump according to claim 4, characterized in that: The conversion component comprises a screw rod (800) and an actuator (130), wherein the actuator (130) is slidably disposed in the connection seat (100), the screw rod (800) is inserted into the actuator (130), and a screw rod nut (810) of the screw rod (800) is fixedly connected to one end of the actuator (130), and the other end of the actuator (130) is connected to the ceramic core (700), and the input end of the screw rod (800) is connected to the output shaft of the motor (600) via a coupling (170).

6. The metering pump according to claim 5, characterized in that: The connection seat (100) is provided with a cavity (101) for the actuator (130) to move, and guide members (120) are provided on both sides of the cavity (101). Slide blocks extending to cooperate with the guide members (120) are respectively provided on both sides of the actuator (130), and the slide blocks cooperate with the guide members (120) so that the actuator (130) can slide along the axial direction of the connection seat (100).

7. The metering pump according to claim 6, characterized in that: A slide groove (121) is provided in the guide member (120), and the slider comprises a rotating shaft (132) arranged along the axial direction of the actuator (130) and a guide bearing (133) rotatably arranged on the rotating shaft (132), and the guide bearing (133) is clearance-matched with the slide groove (121).

8. The metering pump according to claim 5, characterized in that: The end of the actuator (130) is connected to the ceramic core (700) via a floating joint (720), and the surface of the ceramic core (700) is mirror-finished.

9. The metering pump according to claim 5, characterized in that: A fixing seat (150) for mounting the motor (600) is arranged on the connecting seat (100), an angular contact bearing (160) is arranged on the fixing seat (150), the output shaft is plug-connected to the angular contact bearing (160), and the coupling (170) abuts against the angular contact bearing (160).

10. The metering pump according to claim 4, characterized in that: The docking seat (200) is provided with a second protruding end (204) and a third embedding groove (202) for embedding the second sealing member (210) at one end away from the pump body (300), and the connecting seat (100) is provided with a fourth embedding groove. After the second protruding end (204) is embedded in the fourth embedding groove, the docking seat (200) abuts against the third embedding groove (202).

Images