screw pump

Abstract

This invention discloses a spiral pump, comprising a pump body, a conveying component, and a pressing component. The pump body has a receiving cavity, with an inlet communicating with the cavity at its lower end and a mounting hole communicating with the cavity at its upper end. A pump nozzle communicating with the cavity is mounted on the pump body. The conveying component is rotatably mounted in the receiving cavity, and its outer periphery has a spiral structure for pumping media from the lower end to the upper end of the receiving cavity. The pressing component is slidably inserted into the mounting hole, and a driving structure is provided between the pressing component and the conveying component. Pressing the pressing component triggers the driving structure to drive the conveying component to rotate. The spiral pump provided by this invention can pump out liquids or powders by pressing the pressing component, avoiding slippage and operational errors that occur when pumping out media by rotating a knob.

Description

Technical Field

[0001] This invention relates to the field of pump technology, and in particular to a screw pump. Background Technology

[0002] Currently, a type of screw pump has appeared on the market. This screw pump is installed on a container and includes a pump body with a delivery pipe and a screw rod rotatably installed inside the delivery pipe. A pump nozzle connected to the delivery pipe is located at the upper end of the pump body, and a knob is rotatably installed at the upper end of the pump body. One end of the knob is inserted into the delivery pipe and connected to the screw rod. In the process of pumping liquids or powders from a container, the medium in the container enters the delivery pipe from the lower end of the pump body. The user turns the knob, causing the screw rod to rotate. The helical structure on the screw rod then pumps the medium from the lower end of the delivery pipe to the upper end of the delivery pipe and ejects it from the pump nozzle. However, existing screw pumps have the following problems: 1. During use, the knob may slip when turned due to the user's hands or the medium sticking to it, affecting the pumped medium; 2. It is prone to operational errors. During use, the user may turn the knob in the wrong direction, resulting in the inability to pump the medium or even sucking external debris into the pump body. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a spiral pump that can pump out the medium by pressing a pressing element, avoiding slippage, operation errors, and other situations during use.

[0004] According to an embodiment of the present invention, a spiral pump includes a pump body, a conveying component, and a pressing component. The pump body is provided with a receiving cavity, an inlet communicating with the receiving cavity is provided at the lower end of the pump body, and a mounting hole communicating with the receiving cavity is provided at the upper end of the pump body. A pump nozzle communicating with the receiving cavity is mounted on the pump body. The conveying component is rotatably mounted in the receiving cavity, and a spiral structure for pumping medium from the lower end of the receiving cavity to the upper end of the receiving cavity is provided on the outer periphery of the conveying component. The pressing component is slidably inserted into the mounting hole, and a driving structure is provided between the pressing component and the conveying component, wherein pressing the pressing component can trigger the driving structure to drive the conveying component to rotate.

[0005] The spiral pump according to the embodiments of the present invention has at least the following beneficial effects: With the above-described configuration, the spiral pump provided by the present invention can drive the conveying component to rotate by pressing the pressing element to trigger the drive structure. Then, the spiral structure on the conveying component can pump liquid or powder and other media from the lower end of the receiving cavity to the upper end of the receiving cavity, and the media can be sprayed out from the pump nozzle. Thus, the spiral pump provided by the present invention can pump out the media by pressing the pressing element, avoiding slippage, operation errors and other situations that exist in the method of pumping out the media by rotating the knob.

[0006] According to some embodiments of the present invention, the conveying member is provided with a receiving hole, the driving structure includes an elastic member, a first ratchet and a second ratchet that mesh with each other, the first ratchet is disposed in the receiving hole and can slide up and down relative to the conveying member, the elastic member is disposed between the first ratchet and the pump body, and the pressing member is provided with an abutting portion for abutting with the first ratchet tooth of the first ratchet, wherein the pressing member can push the first ratchet downward to slide away from the second ratchet through the abutting portion engaging with the first ratchet tooth of the first ratchet, and the elastic member can drive the first ratchet to slide upward. When the first ratchet slides upward, the first ratchet tooth of the first ratchet and the second ratchet tooth of the second ratchet engage with each other to drive the first ratchet to rotate the conveying member.

[0007] According to some embodiments of the present invention, the first ratchet has two or more first ratchet teeth arranged circumferentially along the conveying member, and each first ratchet tooth is provided with an upward-facing first guide slope. The second ratchet is correspondingly provided with two or more second ratchet teeth arranged circumferentially along the sidewall of the mounting hole. Each second ratchet tooth is provided with a second guide slope capable of engaging with any of the first guide slopes. The pressing member is provided with two or more abutting portions, each abutting portion capable of engaging with any one of the first guide slopes.

[0008] According to some embodiments of the present invention, a first limiting structure is provided between the first ratchet and the conveying member, the first limiting structure being used to restrict the first ratchet from rotating relative to the conveying member, and a second limiting structure is provided between the pressing member and the pump body, the second limiting structure being used to restrict the pressing member from rotating relative to the pump body.

[0009] According to some embodiments of the present invention, the first limiting structure includes a first limiting protrusion and a first limiting groove. One of the first limiting protrusion and the first limiting groove is disposed on the inner wall of the receiving hole, and the other is disposed on the outer peripheral surface of the first ratchet. The first limiting protrusion is inserted into the first limiting groove.

[0010] According to some embodiments of the present invention, the second limiting structure includes a second limiting protrusion and a second limiting groove, wherein one of the second limiting protrusion and the second limiting groove is disposed on the inner wall of the mounting hole and the other is disposed on the pressing member, and the second limiting protrusion is inserted into the second limiting groove.

[0011] According to some embodiments of the present invention, the first ratchet has a through hole, the lower side wall of the receiving cavity has a vent hole opposite to the receiving hole, and a venting channel is provided inside the pressing member or between the pressing member and the inner wall of the mounting hole. The venting channel, the through hole, the receiving hole and the vent hole are connected in sequence.

[0012] According to some embodiments of the present invention, the elastic element is configured as a spring, the spring is located in the receiving hole, one end of the spring abuts against the first ratchet, and the other end abuts against the lower sidewall of the receiving cavity.

[0013] According to some embodiments of the present invention, the second limiting protrusion is disposed on the pressing member, the second limiting groove is disposed on the inner wall of the mounting hole, the ventilation channel includes the gap between the bottom wall of the second limiting groove and the second limiting protrusion, the gap between the inner wall of the mounting hole and the pressing member, the pressing member is fixedly mounted with a sealing ring, the sealing ring is located above the second limiting groove and abuts against the inner wall of the mounting hole for sealing, and the sealing ring can slide downward with the pressing member to open the ventilation channel.

[0014] According to some embodiments of the present invention, the pump body includes a main body and a pump cover, the pump cover is screwed to the upper end of the pump body, the pump cover and the main body enclose the receiving cavity, the inlet is disposed on the lower end face of the main body, and the mounting hole and the pump nozzle are disposed on the pump cover.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0017] Figure 1 This is a schematic diagram of the internal structure of the spiral pump (when the press is not pressed) according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 This is a schematic diagram of the internal structure of the spiral pump (when the pressing element is pressed) according to an embodiment of the present invention;

[0020] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0021] Figure 5 for Figure 1A half-sectional schematic diagram of a portion of the screw pump components is shown;

[0022] Figure 6 for Figure 1 An exploded view of the screw pump is shown.

[0023] Figure 7 for Figure 1 A schematic diagram of the first ratchet of the screw pump is shown;

[0024] Figure 8 for Figure 1 A schematic diagram of the connector of the pressing component of the screw pump is shown;

[0025] Figure 9 for Figure 1 A schematic diagram of the pump cover of the pressing component of the screw pump is shown;

[0026] Figure 10 for Figure 1 A schematic diagram of the lower side of the screw pump is shown;

[0027] Figure 11 for Figure 1 The diagram shown illustrates the installation of a screw pump in a container.

[0028] Figure label:

[0029] Pump body 100, main body 100a, pump cover 100b, receiving cavity 110, inlet 120, pump nozzle 130, mounting hole 140, second limiting groove 150, ventilation hole 160, guide part 170, conveying component 200, spiral structure 210, receiving hole 220, first limiting protrusion 230, pressing component 300, connector 300a, pressing head 300b, abutment part 310, second limiting protrusion 320, elastic component 410, first ratchet 420, first ratchet tooth 421, first limiting groove 422, through hole 423, first guide slope 4211, second ratchet tooth 430, second guide slope 431, sealing ring 500, container 600, conveying path s1, ventilation path s2. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientations, 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. They are only for the convenience of describing the present invention 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. Therefore, they cannot be understood as limitations on the present invention.

[0032] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0033] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0034] Reference Figures 1 to 4 According to an embodiment of the present invention, a spiral pump includes a pump body 100, a conveying member 200, and a pressing member 300. The pump body 100 is provided with a receiving cavity 110, an inlet 120 communicating with the receiving cavity 110 is provided at the lower end of the pump body 100, and a mounting hole 140 communicating with the receiving cavity 110 is provided at the upper end of the pump body 100. A pump nozzle 130 communicating with the receiving cavity 110 is mounted on the pump body 100. The conveying member 200 is rotatably mounted in the receiving cavity 110, and a spiral structure 210 for pumping the medium from the lower end of the receiving cavity 110 to the upper end of the receiving cavity 110 is provided on the outer periphery of the conveying member 200. The pressing member 300 is slidably inserted into the mounting hole 140, and a driving structure is provided between the pressing member 300 and the conveying member 200, wherein pressing the pressing member 300 can trigger the driving structure to drive the conveying member 200 to rotate. Figure 3 As shown, the inlet 120, the gap between the inner wall of the receiving cavity 110 and the spiral structure 210, and the pump nozzle 130 are connected, thereby forming the conveying path s1 of the pumping medium. Figure 3 The medium transport path s1 is shown as a dashed line, and the arrows on the transport path s1 indicate the direction of medium transport. (Refer to...) Figure 11 The aforementioned screw pump can be installed in container 600. The screw pump is used to pump liquid or powder media from container 600 out along the conveying path s1.

[0035] Reference Figures 1 to 4With the above-described configuration, the spiral pump provided by this invention can drive the conveying component 200 to rotate by pressing the pressing element 300 to trigger the drive structure. The spiral structure 210 on the conveying component 200 then pumps liquid or powder media from the lower end of the receiving cavity 110 to the upper end, and the media can then be ejected from the pump nozzle 130. Therefore, the spiral pump provided by this invention can pump out the media by pressing the pressing element 300, avoiding slippage and operational errors that occur when pumping out the media by turning a knob. Furthermore, pressing the pressing element 300 also conforms to people's current living habits, making the spiral pump provided by this invention more user-friendly.

[0036] Reference Figure 2 , Figure 4 and Figure 5It is conceivable that in some embodiments, the conveying member 200 is provided with a receiving hole 220, and the driving structure includes an elastic member 410, a first ratchet 420 and a second ratchet that mesh with each other. The first ratchet 420 is disposed in the receiving hole 220 and can slide up and down relative to the conveying member 200. The elastic member 410 is disposed between the first ratchet 420 and the pump body 100. The pressing member 300 is provided with an abutting part 310 for abutting and engaging with the first ratchet tooth 421 of the first ratchet 420. The pressing member 300 can push the first ratchet 420 downward to disengage from the second ratchet through the engagement of the abutting part 310 and the first ratchet tooth 421 of the first ratchet 420. The elastic member 410 can drive the first ratchet 420 to slide upward. When the first ratchet 420 slides upward, the first ratchet tooth 421 of the first ratchet 420 and the second ratchet tooth 430 of the second ratchet engage with each other to drive the first ratchet 420 to rotate the conveying member 200. Specifically, pressing the pressing member 300 causes the pressing member 300 to push the first ratchet 420 downward to slide away from the second ratchet. At this time, the first ratchet tooth 421 and the second ratchet are no longer meshed with each other. At this time, under the action of the elastic member 410, the abutting part 310 and the first ratchet tooth 421 of the first ratchet 420 cooperate with each other, which can make the first ratchet 420 deflect relative to the second ratchet by a certain angle, realizing the misalignment of the first ratchet 420 and the second ratchet. After releasing the pressing member 300, the elastic member 410 can drive the first ratchet 420 to slide upward and the pressing member 300 to reset. During this process, the ratchet teeth of the first ratchet 420 and the ratchet teeth of the second ratchet can cooperate with each other, so that the first ratchet 420 drives the conveying member 200 to rotate, so that the first ratchet 420 and the second ratchet return from the misaligned state to the meshed state. The spiral structure 210 on the conveying member 200 can also pump the medium from the lower end of the receiving cavity 110 to the upper end of the receiving cavity 110. With the above configuration, the screw pump provided by this invention can repeatedly press the pressing member 300 to pump out the medium. Each press of the pressing member 300 causes the first ratchet 420 to drive the conveying member 200 to rotate by the same angle, thus allowing the screw pump to pump out a fixed amount of medium. After releasing the pressing member 300, the first ratchet 420 and the second ratchet can re-engage, thereby locking the conveying member 200. Therefore, compared with existing screw pumps, the screw pump provided by this invention has an automatic locking function, effectively preventing accidental pumping out of the medium. In addition, during the rotation of the conveying member 200 driven by the first ratchet 420, the axial pressure applied by the first ratchet 420 to the conveying member 200 is small, resulting in less resistance when the conveying member 200 rotates. Furthermore, the process of pressing the pressing member 300 is separate from the process of rotating the conveying member 200, thus requiring less effort when pressing the pressing member 300.

[0037] Reference Figures 7 to 9Specifically, in some embodiments, the first ratchet 420 has two or more first ratchet teeth 421, which are arranged circumferentially along the conveyor 200. Each first ratchet tooth 421 has an upward-facing first guide slope 4211. The second ratchet correspondingly has two or more second ratchet teeth 430, which are arranged circumferentially along the conveyor 200 on the sidewall of the mounting hole 140. Each second ratchet tooth 430 has a second guide slope 431 capable of engaging with any of the first guide slopes 4211. The pressing member 300 has two or more abutment portions 310, which can engage with any one of the first guide slopes 4211. Therefore, referring to… Figure 4 When the pressing member 300 is pressed, causing the pressing member 300 to push the first ratchet 420 downwards and disengage from the second ratchet, under the action of the elastic member 410, the abutting part 310 and the corresponding first guide slope 4211 abut against each other, which can cause the first ratchet 420 to deflect relative to the second ratchet by a certain angle, realizing the misalignment of the first ratchet 420 and the second ratchet. At this time, the first guide slope 4211 of the first ratchet 421 abuts against the second guide slope 431 of the corresponding second ratchet 430. Thus, when released... After the pressing member 300 is pressed, the elastic member 410 can drive the first ratchet 420 to slide upward. During this process, the first guide slope 4211 of the first ratchet 421 and the second guide slope 431 of the corresponding second ratchet 430 cooperate with each other to make the first ratchet 420 drive the conveying member 200 to rotate, so that the first ratchet 420 and the second ratchet are restored from the misaligned state to the meshed state. The spiral structure 210 on the conveying member 200 can also pump the medium from the lower end of the receiving cavity 110 to the upper end of the receiving cavity 110.

[0038] It should be noted that the above-mentioned drive structure can also adopt other configurations. For example, the drive structure includes the first ratchet 420 and the abutment portion 310 on the pressing member 300. The first ratchet 420 is fixedly connected to the conveying member 200. A return spring is provided between the pressing member 300 and the first ratchet 420. When the pressing member 300 is pressed, the abutment portion 310 and the corresponding first guide inclined surface 4211 on the first ratchet 420 abut against each other, thereby causing the first ratchet 420 to drive the conveying member 200 to rotate. After the pressing member 300 is released, the return spring can push the pressing member 300 to reset. With this configuration, the drive structure does not need to include a second ratchet.

[0039] Reference Figure 2 and Figure 5It is conceivable that, in some embodiments, a first limiting structure is provided between the first ratchet 420 and the conveying member 200, the first limiting structure being used to restrict the rotation of the first ratchet 420 relative to the conveying member 200, and a second limiting structure is provided between the pressing member 300 and the pump body 100, the second limiting structure being used to restrict the rotation of the pressing member 300 relative to the pump body 100. Through the above-mentioned settings, it can be ensured that the spiral pump provided by the present invention can work normally.

[0040] Reference Figure 2 , Figure 5 and Figure 7 Specifically, in some embodiments, the first limiting structure includes a first limiting protrusion 230 and a first limiting groove 422. One of the first limiting protrusion 230 and the first limiting groove 422 is disposed on the inner wall of the receiving hole 220, and the other is disposed on the outer peripheral surface of the first ratchet 420. The first limiting protrusion 230 is inserted into the first limiting groove 422. Thus, through the cooperation of the first limiting protrusion 230 and the first limiting groove 422, the rotation of the first ratchet 420 relative to the conveying member 200 can be restricted.

[0041] Reference Figure 2 and, Figure 5 and Figure 8 Specifically, in some embodiments, the second limiting structure includes a second limiting protrusion 320 and a second limiting groove 150. One of the second limiting protrusion 320 and the second limiting groove 150 is disposed on the inner wall of the mounting hole 140, and the other is disposed on the pressing member 300. The second limiting protrusion 320 is inserted into the second limiting groove 150. Thus, through the cooperation of the second limiting protrusion 320 and the second limiting groove 150, the first ratchet 420 can rotate relative to the conveying member 200.

[0042] It should be noted that in other embodiments, the first ratchet 420 may be restricted from rotating relative to the conveyor 200 in other ways. For example, the shape of the receiving hole 220 may be elliptical, polygonal or other non-circular, and a part of the first ratchet 420 may also be set to a non-circular shape corresponding to the shape of the receiving hole 220.

[0043] It should be noted that, in the specific implementation process, other methods can also be used to restrict the rotation of the pressing member 300 relative to the pump body 100. For example, the shape of the mounting hole 140 is elliptical, polygonal or other non-circular, and a part of the pressing member 300 is also set to a non-circular shape corresponding to the shape of the receiving hole 220.

[0044] Reference Figure 3 and Figure 4It is conceivable that in some embodiments, the first ratchet 420 has a through hole 423, the lower side wall of the receiving cavity 110 has a vent hole 160 opposite to the receiving hole 220, and a ventilation channel is provided inside the pressing member 300 or between the pressing member 300 and the inner wall of the mounting hole 140. Thus, the ventilation channel, the through hole 423, the receiving hole 220, and the vent hole 160 are sequentially connected, thereby forming a ventilation path s2 for airflow (e.g., Figure 3 and Figure 4 As shown in the diagram, this allows for 100% air exchange between the inside and outside of the pump body. It should be noted that... Figure 3 and Figure 4 The ventilation path s2 is shown with a dashed line. The arrows on the ventilation path s2 indicate the situation when outside air enters the container 600 through the pump body 100.

[0045] Reference Figure 4 Specifically, the aforementioned ventilation channel may include the gap between the pressing member 300 and the mounting hole 140, and the gap between the abutting part 310 and the first ratchet 420.

[0046] Reference Figure 2 and Figure 4 It is conceivable that, in some embodiments, the second limiting protrusion 320 is disposed on the pressing member 300, the second limiting groove 150 is disposed on the inner wall of the mounting hole 140, the ventilation channel includes the gap between the bottom wall of the second limiting groove 150 and the second limiting protrusion 320, the gap between the inner wall of the mounting hole 140 and the pressing member, and a sealing ring 500 is fixedly installed on the pressing member 300. The sealing ring 500 is located above the second limiting groove 150 and abuts against the inner wall of the mounting hole 140 for sealing, and the sealing ring 500 can slide downward with the pressing member 300 to open the ventilation channel. Thus, as Figure 2 As shown, when the pressing element 300 is not pressed, the sealing ring 500 is located above the second limiting groove 150. At this time, the sealing ring 500 abuts against the inner wall of the mounting hole 140 to seal, thereby closing the ventilation channel and preventing external debris from entering the receiving cavity 110; Figure 4 As shown, when the pressing member 300 needs to be pressed, the sealing ring 500 moves downward with the pressing member 300 to the second limiting slide groove 150, thereby opening the ventilation channel. At this time, air can flow through the gap between the bottom wall of the second limiting slide groove 150 and the second limiting protrusion 320 to achieve ventilation.

[0047] Reference Figure 1 and Figure 6As can be imagined, in some embodiments, the elastic element 410 is set as a spring, which is located in the receiving hole 220. One end of the spring abuts against the first ratchet 420, and the other end abuts against the lower side wall of the receiving cavity 110. Thus, the spring can drive the first ratchet 420 to move upward.

[0048] It should be noted that the elastic element 410 mentioned above can also be configured in other ways. For example, the elastic element 410 can be configured as a tension spring, the pressing element 300 is provided with a clearance hole, the tension spring passes through the clearance hole, one end of the tension spring is connected to the upper side wall of the receiving cavity 110, and the other end is connected to the first ratchet 420.

[0049] Reference Figure 1 As can be imagined, in some embodiments, a guide portion 170 protrudes from the lower sidewall of the receiving cavity 110. The guide portion 170 is embedded in the receiving hole 220. The guide portion 170 can guide the rotation of the conveying member 200 and can also position the installation of the conveying member 200. There are two or more inlets 120, which are provided on the lower sidewall of the receiving cavity 110 and distributed around the guide portion 170.

[0050] Reference Figure 1 and Figure 6 Specifically, in some embodiments, the pump body 100 includes a main body 100a and a pump cover 100b. The pump cover 100b is screwed to the upper end of the pump body 100, and the pump cover 100b and the main body 100a enclose a receiving cavity 110. An inlet 120 is provided on the lower end face of the main body 100a. A mounting hole 140 and a pump nozzle 130 are provided on the pump cover 100b. The pressing member 300 includes a pressing head 300b and a connecting head 300a. The connecting head 300a is slidably mounted in the mounting hole 140. The pressing head 300b and the connecting head 300a are detachably connected, and at least a portion of the diameter of the pressing head 300b is larger than the diameter of the mounting hole 140 and is located outside the pump body 100. With the above configuration, the assembly of various components of the screw pump can be facilitated, and the pressing member 300 can be prevented from completely sliding into the pump body 100.

[0051] Reference Figure 8 Specifically, the aforementioned abutting part 310 is provided on the connector 300a, and the second limiting protrusion 320 is provided on the pressing head 300b.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0053] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A spiral pump, characterized in that, include: The pump body (100) is provided with a receiving cavity (110). The lower end of the pump body (100) is provided with an inlet (120) communicating with the receiving cavity (110). The upper end of the pump body (100) is provided with a mounting hole (140) communicating with the receiving cavity (110). A pump nozzle (130) communicating with the receiving cavity (110) is installed on the pump body (100). A conveying component (200) is rotatably mounted in the receiving cavity (110), and the outer periphery of the conveying component (200) is provided with a spiral structure (210) for pumping the medium from the lower end of the receiving cavity (110) to the upper end of the receiving cavity (110). A pressing member (300) is slidably inserted into the mounting hole (140). A driving structure is provided between the pressing member (300) and the conveying member (200). Pressing the pressing member (300) can trigger the driving structure to drive the conveying member (200) to rotate. The conveying member (200) is provided with a receiving hole (220). The driving structure includes an elastic member (410), a first ratchet (420) and a second ratchet that mesh with each other. The first ratchet (420) is disposed in the receiving hole (220) and can slide up and down relative to the conveying member (200). The elastic member (410) is disposed between the first ratchet (420) and the pump body (100). The second ratchet (430) is disposed on the side wall of the mounting hole (140). The pressing member (300) is provided with an abutting part (310) for abutting and engaging with the first ratchet tooth (421) of the first ratchet (420). The pressing member (300) is capable of... The abutment portion (310) engages with the first ratchet tooth (421) of the first ratchet (420) to push the first ratchet (420) downward to slide away from the second ratchet and cause the first ratchet (420) to deflect and misalign relative to the second ratchet. The elastic element (410) can drive the first ratchet (420) to slide upward. When the first ratchet (420) slides upward, the first ratchet tooth (421) of the first ratchet (420) and the second ratchet tooth (430) of the second ratchet engage with each other to drive the first ratchet (420) to drive the conveyor (200) to rotate, and cause the first ratchet (420) and the second ratchet to return from the misaligned state to the meshed state. The first ratchet (420) has a through hole (423), and the lower side wall of the receiving cavity (110) has a vent hole (160) opposite to the receiving hole (220). A ventilation channel is provided between the pressing member (300) and the inner wall of the mounting hole (140). The ventilation channel, the through hole (423), the receiving hole (220) and the vent hole (160) are connected in sequence. The ventilation channel includes the gap between the pressing member (300) and the mounting hole (140) and the gap between the abutting part (310) and the first ratchet (420). A sealing ring (500) is fixedly installed on the pressing member (300). The sealing ring (500) can abut against the inner wall of the mounting hole (140) to seal and close the ventilation channel. The sealing ring (500) can slide downward with the pressing member (300) to open the ventilation channel.

2. The screw pump according to claim 1, characterized in that, The first ratchet (420) has two or more first ratchet teeth (421), which are arranged circumferentially along the conveyor (200). The first ratchet teeth (421) are provided with an upward-facing first guide slope (4211). The second ratchet is provided with two or more second ratchet teeth (430), which are arranged circumferentially along the conveyor (200) on the side wall of the mounting hole (140). The second ratchet teeth (430) are provided with a second guide slope (431) that can cooperate with any of the first guide slopes (4211). The pressing member (300) is provided with two or more abutting portions (310), which can abut with any one of the first guide slopes (4211).

3. The spiral pump according to claim 1 or 2, characterized in that, A first limiting structure is provided between the first ratchet (420) and the conveying member (200), the first limiting structure being used to restrict the first ratchet (420) from rotating relative to the conveying member (200), and a second limiting structure is provided between the pressing member (300) and the pump body (100), the second limiting structure being used to restrict the pressing member (300) from rotating relative to the pump body (100).

4. The spiral pump according to claim 3, characterized in that... The first limiting structure includes a first limiting protrusion (230) and a first limiting groove (422). One of the first limiting protrusion (230) and the first limiting groove (422) is disposed on the inner wall of the receiving hole (220), and the other is disposed on the outer peripheral surface of the first ratchet (420). The first limiting protrusion (230) is inserted into the first limiting groove (422).

5. The screw pump according to claim 3, characterized in that... The second limiting structure includes a second limiting protrusion (320) and a second limiting groove (150). One of the second limiting protrusion (320) and the second limiting groove (150) is disposed on the inner wall of the mounting hole (140), and the other is disposed on the pressing member (300). The second limiting protrusion (320) is inserted into the second limiting groove (150).

6. The screw pump according to claim 1 or 2, characterized in that... The elastic element (410) is configured as a spring, which is located in the receiving hole (220). One end of the spring abuts against the first ratchet (420), and the other end abuts against the lower side wall of the receiving cavity (110).

7. The screw pump according to claim 5, characterized in that, The second limiting protrusion (320) is disposed on the pressing member (300), the second limiting groove (150) is disposed on the inner wall of the mounting hole (140), the ventilation channel includes the gap between the bottom wall of the second limiting groove (150) and the second limiting protrusion (320), the gap between the inner wall of the mounting hole (140) and the pressing member, and the sealing ring (500) is located above the second limiting groove (150).

8. The screw pump according to any one of claims 1 to 2, characterized in that, The pump body (100) includes a main body (100a) and a pump cover (100b). The pump cover (100b) is screwed to the upper end of the pump body (100). The pump cover (100b) and the main body (100a) enclose the receiving cavity (110). The inlet (120) is provided on the lower end face of the main body (100a). The mounting hole (140) and the pump nozzle (130) are provided on the pump cover (100b).

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