Ceramic pump with exhaust passage

Abstract

The application discloses a ceramic pump with an exhaust passage, a pump rod is inserted into the central hole of a pump body, the pump rod can slide or rotate in the pump body, the pump body is provided with a bottom cover at the other end opposite to the insertion port of the pump rod, the pump body is provided with a liquid inlet nozzle and a liquid outlet nozzle which are communicated with the central hole, a liquid guide groove is formed in the rod part of the pump rod, an exhaust hole is formed above the liquid guide groove on the pump rod, and the exhaust hole has a spacing between the lowest side and the top end of the liquid guide groove; when starting exhaust, the exhaust hole is communicated with the liquid inlet nozzle and the liquid outlet nozzle to realize exhaust, and the liquid guide groove is not communicated; when filling, the liquid guide groove is communicated with the liquid inlet nozzle or the liquid outlet nozzle, and the exhaust hole is not communicated. The exhaust hole is formed in the pump rod as the exhaust passage, when starting exhaust, the pump rod only needs to be pushed down to the exhaust hole which is communicated with the liquid inlet hole and the liquid outlet hole, so that the exhaust can be realized, the air emptying time is shortened, the filling machine can quickly start filling work, and the filling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the pump technical field, especially a ceramic pump with exhaust passage. BACKGROUND

[0002] The ceramic pump is widely used in the filling equipment in the fields of medicine, biological reagent, etc. due to its high precision in controlling fluid metering and strong corrosion resistance.

[0003] After each filling operation is completed, the ceramic pump and the connecting pipeline, etc. are all disassembled, cleaned and reassembled. After the ceramic pump is cleaned and reassembled, a lot of air is left in the delivery pipeline and the ceramic pump. When the ceramic pump is used to meter high-viscosity liquid, the delivery distance of the liquid from the liquid storage tank to the delivery pipe, the ceramic pump, the delivery pipe and the needle is long, and the liquid has high viscosity and poor flowability. Therefore, when the next machine is started, the air in the delivery pipeline needs to be slowly discharged by slowly pushing and pulling the ceramic pump, and the high-viscosity liquid needs to be slowly pumped until the air is completely discharged, and the filling work can be normally carried out.

[0004] In the prior art, the ceramic pump is operated by the inlet and outlet liquid holes and the liquid guide passage to discharge the air. Therefore, the pump rod needs to be repeatedly pushed and pulled and rotated like the filling work steps to discharge the air. In this way, the air is discharged, the stroke of the pump rod is long, the pushing and pulling movement of the pump rod is slow, a single pushing and pulling stroke needs to be spent for a long time, the amount of air discharged by a single pushing and pulling stroke is small, and a long time is needed to completely discharge the air in the ceramic pump. Therefore, the ceramic pump needs to be started for a long time to discharge the air before the filling work can be normally started. This process needs to be spent for about twenty minutes, which greatly affects the filling work of the filling machine and reduces the filling efficiency of the filling machine. SUMMARY

[0005] The present application provides a ceramic pump with exhaust passage which has reasonable structure, shortens the air discharge time and improves the filling efficiency.

[0006] The technical solution adopted by the present application is as follows:

[0007] A ceramic pump with an exhaust passage, a pump rod is inserted into the central hole of the pump body, the pump rod can slide or rotate in the pump body, the pump body is provided with a bottom cover at the other end opposite to the pump rod insertion port, the pump body is provided with a liquid inlet nozzle and a liquid outlet nozzle communicating with the central hole, a liquid guide groove is formed on the rod of the pump rod, an exhaust hole is formed above the liquid guide groove on the pump rod, and there is a distance between the lowest side of the exhaust hole and the top end of the liquid guide groove; during start-up exhaust, the exhaust hole is communicated with the liquid inlet nozzle and the liquid outlet nozzle to realize exhaust, and the liquid guide groove is not communicated; during filling work, the liquid guide groove is communicated with the liquid inlet nozzle or the liquid outlet nozzle, and the exhaust hole is not communicated.

[0008] As a further improvement of the above technical solution:

[0009] The axial height h between the lowest side of the exhaust hole and the top end of the liquid guide groove is between 8mm and 12mm.

[0010] The hole diameter d of the exhaust hole is less than or equal to the hole diameter D of the liquid inlet hole of the liquid inlet nozzle or the liquid outlet hole of the liquid outlet nozzle, and d is about 0.2-1.0 times of D.

[0011] The hole diameter d of the exhaust hole is 1mm-5mm.

[0012] The axial height H3 of the center axis of the exhaust hole to the bottom surface of the pump rod is less than the axial height H1 of the center axis of the liquid inlet nozzle or the liquid outlet nozzle to the bottom surface of the pump body.

[0013] The axial height H1 of the center axis of the liquid inlet nozzle or the liquid outlet nozzle to the bottom surface of the pump body is between 69mm and 79mm; the axial height H2 of the top end of the liquid guide groove to the bottom surface of the pump rod is between 64mm and 68mm; and the axial height H3 of the center axis of the exhaust hole to the bottom surface of the pump rod is between 72mm and 80mm.

[0014] The liquid inlet hole of the liquid inlet nozzle and the liquid outlet hole of the liquid outlet nozzle each include a straight hole section of an inner side and a tapered hole section of an outer side.

[0015] The small-diameter end of the tapered hole section is connected with the straight hole section, the hole diameter of the small-diameter end is the same as that of the straight hole section; and the hole diameter of the straight hole section is larger than that of the exhaust hole.

[0016] The liquid inlet nozzle and the liquid outlet nozzle are arranged on opposite sides of the pump body, and the center axes of the two are located on the same horizontal plane.

[0017] A rod handle is arranged at the top end of the pump rod, a first mounting hole is formed in the rod handle; a second mounting hole is formed in the bottom cover; a baffle is arranged between the bottom cover and the bottom surface of the pump body, and the baffle is arranged in the counterbore of the bottom cover; the pump body, the pump rod and the baffle are made of ceramic material, and the bottom cover is made of non-ceramic metal or plastic material.

[0018] The beneficial effects of the present application are as follows:

[0019] The present application opens an exhaust hole on the pump rod as an exhaust passage, and only needs to push the pump rod down to make the exhaust hole communicate with the liquid inlet hole and the liquid outlet hole to realize exhaust, without repeatedly pushing and pulling or rotating the pump rod, thereby shortening the air exhaust time, enabling the filling machine to quickly start filling work, and improving the filling efficiency.

[0020] The axial height H3 of the center axis of the exhaust hole to the bottom surface of the pump rod is slightly smaller than the axial height H1 of the center axis of the liquid inlet nozzle / liquid outlet nozzle to the bottom surface of the pump body, and when the exhaust hole communicates with the liquid inlet nozzle and the liquid outlet nozzle, there is still a gap between the bottom surface of the pump rod and the bottom surface of the pump body, preventing the pump rod from colliding with the baffle and damaging the pump rod or the baffle. The exhaust hole and the liquid guide groove have sufficient spacing to prevent the exhaust hole from interfering with the filling work of the liquid guide groove and ensure the accuracy of the metering.

[0021] The liquid inlet nozzle and the liquid outlet nozzle are high in position, which not only ensures the sufficient height of the internal metering cavity of the pump body, but also leaves a connected height allowance for the exhaust passage of the pump rod.

[0022] The liquid inlet hole and the liquid outlet hole of the liquid inlet nozzle and the liquid outlet nozzle of the present application are in the mode of inner straight hole and outer tapered hole, which facilitates the entry and exit of the liquid and facilitates the butt joint. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is an exploded view of the present application.

[0024] Figure 2 It is a sectional view of the present application in the exhaust state.

[0025] Figure 3 It is Figure 2 It is an enlarged view of the middle A part.

[0026] Figure 4 It is a sectional view of the present application in the working state.

[0027] In the figure: 1, pump body; 11, liquid inlet nozzle; 111, liquid inlet straight hole section; 112, liquid inlet tapered hole section; 12, liquid outlet nozzle; 121, liquid outlet straight hole section; 122, liquid outlet tapered hole section; 2, pump rod; 21, liquid guide groove; 22, rod handle; 23, first mounting hole; 24, exhaust hole; 3, bottom cover; 31, second mounting hole; 4, baffle. DETAILED DESCRIPTION

[0028] The specific embodiment of the present application will be described below in conjunction with the drawings.

[0029] As Figures 1 to 4As shown, the pump body 1 of the present application is provided with a through central hole in the center, and the pump rod 2 is inserted into the pump body 1 from one end of the central hole. The pump rod 2 can slide in the pump body 1 or rotate around its central axis. The bottom cover 3 is fixed to the other end of the pump body 1 opposite to the insertion port of the pump rod 2. The baffle 4 is arranged between the bottom cover 3 and the bottom surface of the pump body 1, and is arranged in the counterbore of the bottom cover 3. The sealing element is arranged between the baffle 4 and the bottom surface of the pump body 1 for sealing (not shown in the figure).

[0030] The liquid inlet nozzle 11 and the liquid outlet nozzle 12 are respectively arranged on the opposite sides of the middle part of the pump body 1 and extend radially outward. The liquid inlet nozzle 11 is provided with a liquid inlet hole extending through the central hole of the pump body 1, which includes a liquid inlet straight hole section 111 on the inner side and a liquid inlet tapered hole section 112 on the outer side. The liquid inlet tapered hole section 112 is large in the outer side and small in the inner side, and the small-diameter end is connected to the liquid inlet straight hole section 111, and the small-diameter end has the same hole diameter as the liquid inlet straight hole section 111. The liquid outlet nozzle 12 is provided with a liquid outlet hole extending through the central hole of the pump body 1, which includes a liquid outlet straight hole section 121 on the inner side and a liquid outlet tapered hole section 122 on the outer side. The liquid outlet tapered hole section 122 is large in the outer side and small in the inner side, and the small-diameter end is connected to the liquid outlet straight hole section 121, and the small-diameter end has the same hole diameter as the liquid outlet straight hole section 121. The liquid inlet hole and the liquid outlet hole of the liquid inlet nozzle 11 and the liquid outlet nozzle 12 are in the form of a straight hole in the inner section and a tapered hole in the outer section, which facilitates the entry and exit of the liquid and facilitates the connection. The height positions of the liquid inlet nozzle 11 and the liquid outlet nozzle 12 on the pump body 1 are the same, and the central axes of the two are located on the same horizontal plane. The axial height H1 of the central axes of the liquid inlet nozzle 11 and the liquid outlet nozzle 12 to the bottom surface of the pump body 1 is between 69mm and 79mm. The positions of the liquid inlet nozzle 11 and the liquid outlet nozzle 12 are relatively high, which ensures the sufficient height of the internal metering cavity of the pump body 1 and also leaves a connected height allowance for the exhaust passage of the pump rod 2.

[0031] A liquid guiding groove 21 is formed on the outer circumferential surface of the lower half of the pump rod 2. The axial height H2 from the top of the liquid guiding groove 21 to the bottom surface of the pump rod 2 is less than the axial height H1 from the central axis of the inlet nozzle 11 / outlet nozzle 12 to the bottom surface of the pump body 1. H2 is between 64mm and 68mm. A handle 22 is provided at the top of the pump rod 2. A first mounting hole 23 is formed on the handle 22. The handle 22 can be connected to a drive mechanism (not shown in the figure) through the first mounting hole 23, and the drive mechanism drives the pump rod 2 to slide and rotate. A through vent hole 24 is formed radially in the middle of the pump rod 2, above the liquid guiding groove 21. The diameter d of the vent hole 24 is less than or equal to the diameter D of the straight section of the inlet nozzle 11 / outlet nozzle 12, and d is approximately 0.2 to 1.0 times D. The diameter d of the vent hole 24 is 1 mm to 5 mm. This ensures rapid and smooth venting while also guaranteeing sufficient strength for the pump rod 2, preventing the vent hole 24 from being too large and affecting the strength of the pump rod 2. The axial height H3 from the central axis of the vent hole 24 to the bottom surface of the pump rod 2 is slightly less than the axial height H1 from the central axis of the inlet nozzle 11 / outlet nozzle 12 to the bottom surface of the pump body 1. H3 is between 72 mm and 80 mm. When the vent hole 24 connects to the inlet nozzle 11 and the outlet nozzle 12, there is still a gap between the bottom surface of the pump rod 2 and the bottom surface of the pump body 1 to prevent the pump rod 2 from colliding with the baffle 4 and damaging the pump rod 2 or the baffle 4. The axial height h between the lowest side of the vent hole 24 and the top of the liquid guiding groove 21 is between 8mm and 12mm, ensuring that there is sufficient distance between the vent hole 24 and the liquid guiding groove 21, preventing the vent hole 24 from interfering with the filling operation of the liquid guiding groove 21, and ensuring the accuracy of measurement.

[0032] The bottom cover 3 has a second mounting hole 31, through which the bottom cover 3 can be connected to the bracket (not shown in the figure), thereby fixing the pump body 1 to the bracket.

[0033] The pump body 1, pump rod 2, and baffle 4 are all made of ceramic material, while the bottom cover 3 is made of non-ceramic metal or plastic material.

[0034] In actual use, this invention is as follows: Figure 2 As shown, when the pump is started and venting air, the pump rod 2 is pushed down to the vent hole 24, which connects the inlet and outlet holes of the inlet nozzle 11 and the outlet nozzle 12. Pushing and pulling the pump rod 2 causes the vent hole 24 to slide up and down within the diameter range of the inlet and outlet holes to vent air. At this time, the guide groove 21 is not connected. Figure 4 As shown, after the venting is completed, during normal filling, the pump rod 2 slides up and down and rotates within the area of ​​the liquid guide groove 21 that connects the liquid inlet 11 and the liquid outlet 12. The liquid guide groove 21 connects the liquid inlet 11 or the liquid outlet 12 to achieve liquid filling. At this time, the vent hole 24 is blocked by the upper inner wall of the pump body 1 and is not connected.

[0035] The present application opens the exhaust hole 24 on the pump rod 2 as an exhaust passage, and only needs to push the pump rod 2 down to the exhaust hole 24 to be communicated with the liquid inlet hole and the liquid outlet hole to realize the exhaust during the start-up exhaust, without repeatedly pushing and pulling or rotating the pump rod 2 with a large stroke, so that the air exhaust time is shortened, the filling machine can quickly start the filling work, and the filling efficiency is improved.

[0036] The above description is an explanation of the present application, not a limitation of the present application, and the present application can be modified in any form without departing from the spirit of the present application.

Claims

1. A ceramic pump with exhaust passage, comprising a pump body (1), a pump rod (2) is inserted into the central hole of the pump body (1), the pump rod (2) can slide or rotate in the pump body (1), the pump body (1) is provided with a bottom cover (3) at the other end opposite to the insertion port of the pump rod (2), the pump body (1) is provided with a liquid inlet nozzle (11) and a liquid outlet nozzle (12) which communicate with the central hole, a liquid guide groove (21) is formed on the rod part of the pump rod (2), characterized in that: The bottom cover (3) and the bottom surface of the pump body (1) are provided with a baffle (4), the baffle (4) is arranged in the counterbore of the bottom cover (3); the pump rod (2) is provided with an exhaust hole (24) above the liquid guide groove (21), and the lowest side of the exhaust hole (24) and the top end of the liquid guide groove (21) have a spacing; when starting to exhaust, the exhaust hole (24) is communicated with the liquid inlet nozzle (11) and the liquid outlet nozzle (12) to realize exhaust, and the liquid guide groove (21) is not communicated; when filling, the liquid guide groove (21) is communicated with the liquid inlet nozzle (11) or the liquid outlet nozzle (12), and the exhaust hole (24) is not communicated; the axial height H3 from the center axis of the exhaust hole (24) to the bottom surface of the pump rod (2) is less than the axial height H1 from the center axis of the liquid inlet nozzle (11) or the liquid outlet nozzle (12) to the bottom surface of the pump body (1); the liquid inlet nozzle (11) and the liquid outlet nozzle (12) are arranged on opposite sides of the pump body (1), and the center axes of the two are located on the same horizontal plane.

2. The ceramic pump having an exhaust passage according to claim 1, characterized by: The axial height h between the lowest side of the exhaust hole (24) and the top end of the liquid guide groove (21) is between 8mm and 12mm.

3. The ceramic pump having a vent passage according to claim 1, characterized by: The hole diameter d of the exhaust hole (24) is less than or equal to the hole diameter D of the liquid inlet hole of the liquid inlet nozzle (11) or the liquid outlet hole of the liquid outlet nozzle (12).

4. The ceramic pump having a vent passage according to claim 1, characterized by: The hole diameter d of the exhaust hole (24) is between 1mm and 5mm.

5. The ceramic pump having a vent passage according to claim 1, characterized by: The axial height H1 from the center axis of the liquid inlet nozzle (11) or the liquid outlet nozzle (12) to the bottom surface of the pump body (1) is between 69mm and 79mm; the axial height H2 from the top end of the liquid guide groove (21) to the bottom surface of the pump rod (2) is between 64mm and 68mm; and the axial height H3 from the center axis of the exhaust hole (24) to the bottom surface of the pump rod (2) is between 72mm and 80mm.

6. The ceramic pump having a vent passage according to claim 1, characterized by: The liquid inlet hole of the liquid inlet nozzle (11) and the liquid outlet hole of the liquid outlet nozzle (12) each include a straight hole section of an inner side and a tapered hole section of an outer side.

7. The ceramic pump having an exhaust passage according to claim 6, characterized by: The small-diameter end of the tapered hole section is connected with the straight hole section, the hole diameter of the small-diameter end is the same as that of the straight hole section; and the hole diameter of the straight hole section is larger than that of the exhaust hole (24).

8. The ceramic pump having a vent passage according to claim 1, characterized by: The top end of the pump rod (2) is provided with a handle (22), the handle (22) is provided with a first mounting hole (23); the bottom cover (3) is provided with a second mounting hole (31); the pump body (1), the pump rod (2) and the baffle (4) are made of ceramic material, and the bottom cover (3) is made of non-ceramic metal or plastic material.

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