Nested water pump head

Abstract

The present application relates to a nested water extraction head. The nested water extraction head includes a housing, and a joint and a water extraction port are respectively arranged at two opposite ends of the housing. A water extraction pipe is arranged inside the housing. A support member is fixedly arranged at one end of the water extraction pipe away from the water extraction port. A blocking member is arranged inside the housing and is movably sleeved on the water extraction pipe. The blocking member is located between the support member and the water extraction port, the diameter of the blocking member is larger than the diameter of the water extraction port and smaller than the diameter of the inner cavity of the housing, and an elastic element has two ends respectively abutted against the support member and the blocking member. The water remaining at the bottom of the dissolution cup can be extracted through the water extraction pipe, so that residual liquid at the bottom of the dissolution cup can be avoided. At the same time, draining water through the gap between the inner wall of the housing and the blocking member in the early stage of liquid extraction can improve the drainage rate.

Description

Technical Field

[0001] The present application relates to the field of experiments, and particularly to a nested water pumping head. Background Art

[0002] The research and development of drugs requires dissolution tests, so dissolution cups are needed as experimental containers. After the tests, there are high requirements for the cleanliness of the dissolution cups. When using a dissolution cup cleaning instrument with higher efficiency and better effect than manual cleaning, it is necessary to suck out the residual liquid in the dissolution cup as much as possible. When the bottom of the dissolution cup is arc-shaped, it is very difficult to suck out the residual liquid in the dissolution cup completely, which brings inconvenience to subsequent experiments. Summary of the Invention

[0003] Based on this, it is necessary to provide a nested water pumping head for the above problems.

[0004] A nested water pumping head includes:

[0005] A housing, with a joint and a water pumping port respectively arranged at two opposite ends of the housing;

[0006] A water pumping pipe, arranged inside the housing;

[0007] A support member, fixedly arranged at one end of the water pumping pipe far from the water pumping port;

[0008] A blocking member, arranged inside the housing and sleeved on the water pumping pipe movably. The blocking member is located between the support member and the water pumping port. The diameter of the blocking member is larger than the diameter of the water pumping port and smaller than the diameter of the inner cavity of the housing, and

[0009] An elastic element, with two ends respectively abutted against the support member and the blocking member.

[0010] In one embodiment, it further includes a water absorption cover, sleeved on one end of the water pumping pipe far from the support member.

[0011] In one embodiment, at least one opening is arranged at the edge of the open end on the side of the water absorption cover far from the support member.

[0012] In one embodiment, it further includes a liquid storage cavity, arranged at one end of the water pumping pipe far from the water pumping port. The diameter of the liquid storage cavity is larger than the diameter of the pipe connected to the joint. The water pumping pipe, the water pumping port and the liquid storage cavity are arranged on the same axis of the housing.

[0013] In one embodiment, a wide-mouth cavity is arranged at one end of the water pumping pipe close to the joint, and the liquid storage cavity is suspended in the wide-mouth cavity.

[0014] In one embodiment, it further includes a support sleeve sleeved outside the wide mouth cavity, and the liquid storage cavity is fixedly arranged on the support sleeve.

[0015] In one embodiment, the diameter of the water pumping port is smaller than the maximum diameter of the housing.

[0016] In one embodiment, the housing includes a first sub-housing and a second sub-housing, and the first sub-housing and the second sub-housing are detachably connected.

[0017] In one embodiment, the center of gravity of the nested water pumping head is located on the side of the housing close to the water absorption cover.

[0018] In one embodiment, the mass of the water absorption cover is greater than the sum of the masses of the housing, the water pumping pipe, the support member, the blocking member and the elastic element.

[0019] The nested water pumping head provided by the embodiment of the present application includes a housing, a water pumping pipe, a support member, a blocking member and an elastic element. The inside of the housing is evacuated through the joint. Since the air pressure on the side of the housing close to the joint decreases, the blocking member is lifted. Since the diameter of the blocking member is smaller than the diameter of the inner cavity of the housing, when the blocking member rises to a certain position, there will be a gap between the blocking member and the inner wall of the housing. At this time, the liquid in the dissolution cup enters the housing along the gap between the inner wall of the housing and the blocking member, and is drawn out of the dissolution cup along the joint. When the remaining liquid volume in the dissolution cup is not enough to lift the blocking member again, the elastic element pushes the blocking member to block the water pumping port again. At this time, the inside of the housing is continuously evacuated. Since the water pumping pipe extends out of the water pumping port and the bottom of the dissolution cup is arc-shaped. Therefore, the water pumping pipe is closer to the bottom of the dissolution cup than the water pumping port. At this time, the water remaining at the bottom of the dissolution cup can be drawn out through the water pumping pipe, so that residual liquid at the bottom of the dissolution cup can be avoided. At the same time, draining water through the gap between the inner wall of the housing and the blocking member in the early stage of liquid extraction can improve the drainage rate. Description of the Drawings

[0020] Figure 1 Schematic diagram of the nested water pumping head provided by the embodiment of the present application;

[0021] Figure 2 Cross-sectional view of the nested water pumping head provided by the embodiment of the present application;

[0022] Figure 3 Cross-sectional view of the nested water pumping head provided by another embodiment of the present application.

[0023] Description of the reference numerals:

[0024] Nested water pumping head 10

[0025] Housing 100

[0026] Adapter 110

[0027] Water pumping port 120

[0028] First sub-housing 130

[0029] Second sub-housing 140

[0030] Water pumping pipe 150

[0031] Support member 210

[0032] Blocking member 220

[0033] Elastic element 230

[0034] Water absorption cover 240

[0035] Opening 242

[0036] Liquid storage cavity 250

[0037] Wide-mouth cavity 260

[0038] Support sleeve 270

[0039] Sealing ring 280. Detailed implementation manners

[0040] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the following further details the nested water pumping head of the present application through examples and in combination with the drawings. It should be understood that the specific examples described herein are only used to explain the present application and are not used to limit the present application.

[0041] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in the present application, unless otherwise specified, both include direct and indirect connections (couplings). In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present application.

[0042] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0043] Please refer to Figures 1-3 , an embodiment of the present application provides a nested water extraction head 10. The nested water extraction head 10 includes a housing 100, a water extraction pipe 150, a support member 210, a blocking member 220, and an elastic member 230. The opposite ends of the housing 100 are respectively provided with a joint 110 and a water extraction port 120. The diameter of the middle part of the housing 100 may be larger than the diameters of the two ends. The joint 110 may have an external thread, and through the external thread, it can be connected to a vacuum extraction device such as a vacuum pump. The vacuum pump can extract the air in the housing 100 through the joint 110 to form a negative pressure in the housing 100. The water extraction port 120 is used to extract the liquid in the dissolution cup. The water extraction pipe 150 may be made of materials such as polyester. The water extraction pipe 150 is disposed in the housing 100. The diameter of the water extraction pipe 150 is smaller than the diameter of the water extraction port 120. That is, there may be a gap between the water extraction pipe 150 and the water extraction port 120. The connection line between the joint 110 and the water extraction port 120 may be the axis of the housing 100. The water extraction pipe 150 may extend along the axis.

[0044] The support member 210 is fixedly disposed at one end of the water extraction pipe 150 away from the water extraction port 120. The support member 210 may be a plate-like structure. There may be an opening in the middle of the plate-like structure. The water extraction pipe 150 may pass through the opening. The edge of the support member 210 may support on the inner wall of the housing 100.

[0045] The blocking member 220 is disposed within the housing 100. The blocking member 220 is movably sleeved on the water suction pipe 150. The blocking member 220 is located between the support member 210 and the water suction port 120. The diameter of the blocking member 220 is larger than the diameter of the water suction port 120 and smaller than the diameter of the inner cavity of the housing 100. The blocking member 220 can slide on the surface of the water suction pipe 150. When there is a pressure difference on both sides of the blocking member 220, the blocking member 220 can slide along the surface of the water suction pipe 150. The two ends of the elastic element 230 respectively abut against the support member 210 and the blocking member 220. Therefore, when the blocking member 220 slides relative to the water suction pipe 150, the blocking member 220 can compress the elastic element 230. When the pressure on the side of the water suction port 120 becomes smaller, the elastic element 230 can push the blocking member 220 to block the water suction port 120. In one embodiment, the elastic element 230 can be a compression spring.

[0046] In the embodiment of the present application, when using the nested water suction head 10, the nested water suction head 10 can be placed at the bottom of the dissolution cup. The water suction port 120 faces the bottom of the dissolution cup. Due to the action of gravity and the elastic force of the elastic element 230, the blocking member 220 will move towards the water suction port 120 and block the water suction port 120. Since the diameter of the blocking member 220 is larger than the diameter of the water suction port 120, the blocking member 220 blocks the water suction port 120. Then, the inside of the housing 100 is evacuated through the joint 110. Since the air pressure on the side of the housing 100 close to the joint 110 decreases, the blocking member 220 is lifted. Since the diameter of the blocking member 220 is smaller than the diameter of the inner cavity of the housing 100, when the blocking member 220 rises to a certain position, there will be a gap between the blocking member 220 and the inner wall of the housing 100. At this time, the liquid in the dissolution cup enters the housing 100 along the gap between the inner wall of the housing 100 and the blocking member 220 and is drawn out of the dissolution cup along the joint 110. When the remaining liquid volume in the dissolution cup is not enough to lift the blocking member 220 again, the elastic element 230 pushes the blocking member 220 to block the water suction port 120 again. At this time, the inside of the housing 100 is continuously evacuated. At this time, the moisture remaining at the bottom of the dissolution cup can be drawn out through the water suction pipe 150, thereby avoiding residual liquid at the bottom of the dissolution cup. By pumping water through the gap between the inner wall of the housing 100 and the blocking member 220 in the early stage of liquid extraction, a larger water pumping volume can be achieved, and the drainage rate can be increased.

[0047] In one embodiment, the nested water pump head 10 further includes a water suction cover 240. The water suction cover 240 is sleeved on one end of the water suction pipe 150 away from the support member 210. The water suction cover 240 can be made of rubber material. The open end of the water suction cover 240 can face the bottom of the dissolution cup. Therefore, the water suction cover 240 can cover the residual liquid at the lowest part of the dissolution cup, which is convenient for increasing the internal and external pressure difference and improving the water suction rate when sucking water through the water suction pipe later.

[0048] In one embodiment, at least one opening 242 is provided at the edge of the open end of the side of the water suction cover 240 away from the support member 210. When absorbing the residual liquid in the water suction cover 240, the residual liquid outside the water suction cover 240 can also enter the water suction cover 240 through the opening 242, so as to achieve the purpose of thoroughly cleaning the residual liquid.

[0049] In one embodiment, the nested water pump head 10 further includes a liquid storage cavity 250. The liquid storage cavity 250 is arranged at one end of the water suction pipe 150 away from the water pumping port 120. The diameter of the liquid storage cavity 250 is larger than the diameter of the pipe connected to the joint 1110. The water in the water suction pipe 150 can flow from the periphery of the liquid storage cavity 250 to the joint 110. The water suction pipe 150, the water pumping port 120 and the liquid storage cavity 250 are arranged on the same axis of the housing 100. When the water suction pipe 150 is about to absorb the residual liquid clean, the liquid near the joint 110 and the liquid in the pipe connected to the joint 110 will fall due to insufficient power. Since the diameter of the liquid storage cavity 250 is larger than the diameter of the pipe connected to the joint 110, the liquid drops from the joint 110 and the pipe connected to the joint 110 can fall into the liquid storage cavity 250. The falling liquid can be stored through the liquid storage cavity 250, preventing the liquid from falling into the bottom of the dissolution cup again.

[0050] In one embodiment, a wide-mouth cavity 260 is provided at one end of the water suction pipe 150 close to the joint 110, and the liquid storage cavity 250 is suspended in the wide-mouth cavity 260. When pumping water from the water suction pipe 150, the liquid flowing through the water suction pipe 150 can enter the joint 110 through the gap between the wide-mouth cavity 260 and the water suction pipe 150.

[0051] In one embodiment, the wide-mouth cavity 260, the water suction pipe 150 and the support member 210 are integrally formed, which is convenient for mold opening and production efficiency improvement.

[0052] In one embodiment, the nested water pump head 10 further includes a support sleeve 270. The support sleeve 270 is disposed outside the wide mouth cavity 260. The liquid storage cavity 250 is fixedly arranged on the support sleeve 270. That is, the support sleeve 270 is sleeved outside the wide mouth cavity 260. And the support sleeve 270 may have an extension extending above the wide mouth cavity 260, and the liquid storage cavity 250 may be fixedly arranged on the extension.

[0053] In one embodiment, the nested water pump head 10 further includes a sealing ring 280, which is sleeved on the water suction pipe 150 and arranged between the water suction port 120 and the blocking member 220. Therefore, when the blocking member 220 seals the water suction port 120, the sealing performance can be improved and the difficulty of the water suction pipe 150 sucking liquid can be reduced.

[0054] In one embodiment, the diameter of the water suction port 120 is smaller than the maximum diameter of the housing 100. That is, there is a diameter-changing structure between the water suction port 120 and the maximum diameter of the housing 100. The diameter of the middle part of the housing 100 may be the largest. The diameter of the water suction port 120 is the smallest. The diameter of the blocking member 220 may be between the diameter of the water suction port 120 and the maximum diameter of the housing 100. Therefore, the blocking member 220 can slide and will not slip out of the water suction port 120.

[0055] In one embodiment, the housing 100 includes a first sub-housing 130 and a second sub-housing 140. The joint 110 is arranged on the first sub-housing 130, and the water suction port 120 is arranged on the second sub-housing 140. The first sub-housing 130 and the second sub-housing 140 are detachably connected. In one embodiment, the first sub-housing 130 and the second sub-housing 140 may be connected by bolts or inserted. Therefore, when the nested water pump head 10 needs to be repaired, the first sub-housing 130 and the second sub-housing 140 can be disassembled, and the cleaning and repair are more convenient.

[0056] In one embodiment, a hard pipe with adjustable length may also be connected between the joint 110 and the vacuum pumping device. A cleaning instrument may also be connected to the end of the hard pipe away from the joint 110. The cleaning instrument may have the function of pumping vacuum. The hard pipe itself is composed of two plastic pipes with higher hardness, and is connected in a nested manner. The relative position is fixed by the friction force between the pipe walls, and at the same time, the tight contact ensures the sealing performance of the system. Since the sizes of different containers are different, the length of the hard pipe can be adjusted to adapt to different containers.

[0057] In one embodiment, the center of gravity of the nested water pumping head 10 is located on the side of the shell 100 close to the water absorption cover 240. That is, the center of gravity of the nested water pumping head 10 is located below the center of the entire nested water pumping head 10. Therefore, when the nested water pumping head 10 is inserted deep into the container, it can be ensured that the water suction port 120 of the nested water pumping head 10 can be vertically downward toward the bottom of the container. A material with a higher mass density can be used in the lower part of the nested water pumping head 10 so that the center of gravity of the nested water pumping head 10 is located on the side of the shell 100 close to the water absorption cover 240.

[0058] In one embodiment, the connector 110 and the vacuum device may be connected via a flexible hose. Since the center of gravity of the nested water pumping head 10 is located on the side of the housing 100 close to the water absorbing hood 240, the flexible hose prevents the nested water pumping head 10 from tipping over when it falls into the container, and allows the nested water pumping head 10 to stably fall on the bottom of the container.

[0059] In one embodiment, the mass of the water absorption cover (240) is greater than the sum of the housing (100), the water suction pipe (150), the support member (210), the blocking member (220), and the elastic element (230). Since the water absorption cover 240 is located at one end of the housing, the center of gravity of the nested water suction head 10 can be located at a side of the housing 100 close to the water absorption cover 240.

[0060] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A nested water pump head, characterized in that, it includes: a housing (100) with connectors (110) and a water pumping port (120) respectively arranged at two opposite ends of the housing (100); a water pumping pipe (150) arranged inside the housing (100); a support member (210) fixedly arranged at one end of the water pumping pipe away from the water pumping port (120); a blocking member (220) arranged inside the housing (100) and movably sleeved on the water pumping pipe. The blocking member (220) is located between the support member (210) and the water pumping port (120). The diameter of the blocking member (220) is larger than the diameter of the water pumping port (120) and smaller than the diameter of the inner cavity of the housing (100), and an elastic element (230), the elastic element is a spring, and its two ends are respectively abutted against the support member (210) and the blocking member (220).

2. The nested water pump head according to claim 1, characterized in that, it further includes a water absorption cover (240) sleeved on one end of the water pumping pipe (150) away from the support member (210).

3. The nested water pump head according to claim 2, characterized in that, at least one opening (242) is arranged at the edge of the open mouth on one side of the water absorption cover (240) away from the support member (210).

4. The nested water pump head according to claim 1, characterized in that, it further includes a liquid storage cavity (250) arranged at one end of the water pumping pipe away from the water pumping port (120). The diameter of the liquid storage cavity (250) is larger than the diameter of the pipe connected to the connector (110). The water pumping pipe, the water pumping port (120) and the liquid storage cavity (250) are arranged on the same axis of the housing (100).

5. The nested water pump head according to claim 4, characterized in that, a wide-mouth cavity (260) is arranged at one end of the water pumping pipe close to the connector (110), and the liquid storage cavity (250) is suspended in the wide-mouth cavity (260).

6. The nested water pump head according to claim 5, characterized in that, it further includes a support sleeve (270) sleeved on the outside of the wide-mouth cavity (260), and the liquid storage cavity (250) is fixedly arranged on the support sleeve (270).

7. The nested water pump head according to claim 1, characterized in that, the diameter of the water pumping port (120) is smaller than the maximum diameter of the housing (100).

8. The nested water pump head according to claim 1, characterized in that, the housing (100) includes a first sub-housing (130) and a second sub-housing (140), and the first sub-housing (130) and the second sub-housing (140) are detachably connected.

9. The nested water pump head according to claim 2, characterized in that, the center of gravity of the nested water pump head (10) is located on the side of the housing (100) close to the water absorption cover (240).

10. The nested water pump head according to claim 9, characterized in that, The mass of the water suction hood (240) is greater than the sum of the masses of the housing (100), the water suction pipe (150), the support member (210), the blocking member (220), and the elastic element (230).

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