Stretch-back squeeze pump

Abstract

The application discloses a stretch rebound type pressing pump, which comprises a body, a fixed sleeve, a liquid outlet pipe assembly and an elastic stretch piece. The body is internally provided with a pump cavity. The fixed sleeve is arranged at the upper portion of the body and located in the pump cavity. The liquid outlet pipe assembly is movably arranged in the fixed sleeve. The lower portion of the liquid outlet pipe assembly is connected with a piston matched with the inner circumferential wall of the pump cavity. The elastic stretch piece is made of plastic material. The upper end of the elastic stretch piece is connected with the fixed sleeve or the body. The lower end of the elastic stretch piece is connected with the liquid outlet pipe assembly. The pressing pump utilizes the fixed sleeve to movably arrange the liquid outlet pipe assembly. The elastic stretch piece made of plastic material is connected between the fixed sleeve and the liquid outlet pipe assembly or between the body and the liquid outlet pipe assembly. When the liquid outlet pipe assembly moves downward, the elastic stretch piece is elongated. When the liquid outlet pipe assembly is released, the elastic stretch piece restores the elastic deformation and rises. The elastic stretch piece can replace the metal spring to reduce the cost. Compared with the plastic spring, the elastic stretch piece has a smaller volume and a greater rebound force, and is beneficial to packaging and transportation.

Description

TECHNICAL FIELD

[0001] The present application relates to a stretch rebound type press pump. BACKGROUND

[0002] At present, a general press pump comprises a body, a piston arranged in the body, a liquid outlet pipe assembly movably arranged in the body to drive the piston to move, a locking cap arranged at the upper portion of the body and sleeved on the outer portion of the liquid outlet pipe assembly, and a press head connected to the upper portion of the liquid outlet pipe assembly and movably arranged relative to the locking cap, wherein a metal spring is arranged between the press head and the locking cap to provide upward reset movement of the press head and the liquid outlet pipe assembly together.

[0003] In order to reduce the cost, the metal spring of the press pump is replaced by a plastic spring in the related art. In order to achieve the corresponding elastic recovery force, the radial size and the length size of the plastic spring are much larger than those of the general metal spring. However, the space between the locking cap and the press head is limited, so that the plastic spring cannot provide the rebound force required in actual use. Moreover, the overall height size and the radial size of the press pump with the above structure are large, which leads to an increase in cost and is not conducive to packaging and transportation. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a stretch rebound type press pump which can reduce the cost, has a large rebound force, and has a small size.

[0005] According to the stretch rebound type press pump of the present application, the body is internally provided with a pump cavity; a fixed sleeve is arranged at the upper portion of the body and located in the pump cavity; a liquid outlet pipe assembly is movably arranged in the fixed sleeve; the lower portion of the liquid outlet pipe assembly is connected with a piston matched with the inner peripheral wall of the pump cavity; and an elastic stretch member composed of plastic material is connected at the upper end of the fixed sleeve or the body and connected at the lower end of the liquid outlet pipe assembly.

[0006] The stretch rebound type press pump of the present application has at least the following beneficial effects:

[0007] The press pump with the above structure has the fixed sleeve movably arranged in the body for the liquid outlet pipe assembly, and the elastic stretch member composed of plastic material is connected between the fixed sleeve and the liquid outlet pipe assembly or between the body and the liquid outlet pipe assembly. When the liquid outlet pipe assembly moves downward to discharge the emulsion, the elastic stretch member is elongated to store energy, and when the liquid outlet pipe assembly is released, the elastic stretch member restores the elastic deformation to rise. The elastic stretch member composed of plastic material can replace the metal spring to reduce the cost, and the elastic stretch member has a smaller size and a larger rebound force than the plastic spring, which helps to reduce the overall size of the press pump to facilitate packaging and transportation.

[0008] In some embodiments of the present application, the elastic stretching member comprises an upper mounting ring, a lower mounting ring and a stretching strip connected between the upper mounting ring and the lower mounting ring, the fixed sleeve is provided with a first annular mounting groove matched with the upper mounting ring, the liquid outlet pipe assembly is provided with a second annular mounting groove matched with the lower mounting ring, and the stretching strip is movable in the gap between the fixed sleeve and the liquid outlet pipe assembly.

[0009] In some embodiments of the present application, the liquid outlet pipe assembly comprises a first pipe body movably penetrating the fixed sleeve and a second pipe body connected to the first pipe body and extending downward, the piston is movably arranged between the lower end of the first pipe body and the lower part of the second pipe body, the first annular mounting groove is arranged on the outer peripheral wall of the upper end of the fixed sleeve, the second annular mounting groove is arranged on the outer peripheral wall of the lower part of the first pipe body, and the side wall of the fixed sleeve is provided with a through opening communicating with the internal passage thereof, and the stretching strip penetrates the through opening to connect the upper mounting ring and the lower mounting ring.

[0010] In some embodiments of the present application, the lower end of the first pipe body is provided with an annular platform protruding from the outer peripheral wall of the first pipe body, the outer peripheral wall of the first pipe body is provided with a plurality of anti-escape blocks located above the annular platform, the plurality of anti-escape blocks are circumferentially distributed at intervals around the axis of the first pipe body, and the anti-escape blocks and the annular platform define the second annular mounting groove.

[0011] In some embodiments of the present application, the anti-escape blocks are provided with a guide slope for guiding the lower mounting ring into the second annular mounting groove, and the guide slope is inclined outward in the radial direction of the first pipe body in the direction from top to bottom.

[0012] In some embodiments of the present application, the upper mounting ring and the lower mounting ring are arranged concentrically, the diameter of the upper mounting ring is greater than that of the lower mounting ring, the lower end of the stretching strip is connected to the upper surface of the lower mounting ring, the upper end of the stretching strip is arranged in the vertical direction, the upper end of the stretching strip is connected to the inner peripheral wall of the upper mounting ring through a horizontal connecting portion, the through opening penetrates the side wall of the fixed sleeve in the up-down direction, and the horizontal connecting portion is movable up and down along the through opening to limit the stretching stroke of the elastic stretching member.

[0013] In some embodiments of the present application, the stretching strip is provided in a plurality, and the plurality of stretching strips are circumferentially distributed at intervals around the axis of the liquid outlet pipe assembly.

[0014] In some embodiments of the present invention, the upper end of the fixing sleeve is provided with two opposing and upwardly extending arc-shaped baffles, the outer peripheral wall of the arc-shaped baffles being able to contact the inner peripheral wall of the upper mounting ring to restrict the upper mounting ring from detaching from the fixing sleeve.

[0015] In some embodiments of the present invention, the upper mounting ring, the lower mounting ring, and the tension strip are an integral plastic structure.

[0016] In some embodiments of the present invention, the upper end of the liquid outlet tube assembly is connected to a push head, and an movable gap is defined between the outer peripheral wall of the fixed sleeve and the inner peripheral wall of the body for the push head to reciprocate up and down.

[0017] 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

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a cross-sectional schematic diagram of one embodiment of the tension-rebound press pump of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the combined structure of the fixed sleeve, the liquid outlet tube assembly, and the elastic tension member in the embodiment;

[0021] Figure 3 A schematic diagram showing the structure in which the fixed sleeve, the liquid outlet tube assembly, and the elastic tension member are separated. Detailed Implementation

[0022] 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.

[0023] In the description of this invention, it should be understood that the orientation descriptions, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer", indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0024] In the description of the present application, the meaning of one or more is one or more, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If it is described that the first, second 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 indicated technical features or implicitly indicating the sequence of indicated technical features.

[0025] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] Referring to Figures 1 to 3 The stretch rebound type pressing pump of the present application comprises: a body 100, which is internally provided with a pump cavity 110; a fixed sleeve 200, which is arranged at the upper part of the body 100 and located inside the pump cavity 110; a liquid outlet pipe assembly 300, which is movably arranged in the fixed sleeve 200, and the lower part of the liquid outlet pipe assembly 300 is connected with a piston 500 matched with the inner circumferential wall of the pump cavity 110; an elastic stretch member 400, which is composed of plastic material, and the upper end of the elastic stretch member 400 is connected with the fixed sleeve 200 or the body 100, and the lower end of the elastic stretch member 400 is connected with the liquid outlet pipe assembly 300.

[0027] The pressing pump with the above structure has the fixed sleeve 200 in the body 100 for movably arranging the liquid outlet pipe assembly 300, and the elastic stretch member 400 composed of plastic material is connected between the fixed sleeve 200 and the liquid outlet pipe assembly 300, or between the body 100 and the liquid outlet pipe assembly 300. When the liquid outlet pipe assembly 300 moves downward to discharge the emulsion, the elastic stretch member 400 is elongated to store energy, and when the liquid outlet pipe assembly 300 is released, the elastic stretch member 400 restores the elastic deformation to rise. Replacing the metal spring with the elastic stretch member 400 composed of plastic material can reduce the cost, and the volume of the plastic spring is smaller and the rebound force is greater, and there is no need to reserve a larger space between the body 100 and the fixed sleeve 200 to accommodate the plastic spring, which helps to reduce the overall size of the pressing pump to facilitate packaging and transportation.

[0028] Referring to Figure 2 and Figure 3In some embodiments of the present application, the elastic stretching member 400 comprises an upper mounting ring 410, a lower mounting ring 420, and a stretching strip 430 connected between the upper mounting ring 410 and the lower mounting ring 420, the fixed sleeve 200 is provided with a first annular mounting groove 210 matched with the upper mounting ring 410, the liquid outlet pipe assembly 300 is provided with a second annular mounting groove 311 matched with the lower mounting ring 420, and the stretching strip 430 can be elastically moved in the gap between the fixed sleeve 200 and the liquid outlet pipe assembly 300. The upper mounting ring 410 is positioned by the first annular mounting groove 210, the lower mounting ring 420 is positioned by the second annular mounting groove 311, and the two ends of the elastic stretching member 400 are fixed, thereby facilitating the assembly of the pressing pump. When the pressing head 600 pushes the liquid outlet pipe assembly 300 to move downward, the stretching strip 430 is elongated, and when the pressing head 600 is released, the stretching strip 430 restores the elastic deformation to move the pressing head 600 and the liquid outlet pipe assembly 300 upward. The stretching strip 430 made of rubber has a larger elastic coefficient than a plastic spring, can provide a larger elastic force, and can ensure that the pressing head 600 and the liquid outlet pipe assembly 300 can be sequentially reset.

[0029] Referring to Figure 2 and Figure 3In some embodiments of the present application, the liquid outlet pipe assembly 300 comprises a first pipe body 310 movably arranged in the fixed sleeve 200 and a second pipe body 320 connected to the first pipe body 310 and extending downwardly, the piston 500 is movably arranged between the lower end of the first pipe body 310 and the lower portion of the second pipe body 320, the first annular mounting groove 210 is arranged on the outer peripheral wall of the upper end of the fixed sleeve 200, the second annular mounting groove 311 is arranged on the outer peripheral wall of the lower portion of the first pipe body 310, the side wall of the fixed sleeve 200 is provided with a through opening 220 which is in communication with the internal passage of the fixed sleeve 200, and the stretchable strip 430 passes through the through opening 220 to connect the upper mounting ring 410 and the lower mounting ring 420. It is to be noted that the internal passages of the first pipe body 310 and the second pipe body 320 are in communication, the bottom of the body 100 is provided with a one-way valve assembly which cooperates with the piston 500, and the positions between the lower end of the first pipe body 310 and the lower portion of the second pipe body 320 where the piston 500 is located are both structures of conventional press pumps, which will not be described further herein. Since the positions between the lower end of the first pipe body 310 and the lower portion of the second pipe body 320 are reserved for the piston 500, the second annular mounting groove 311 arranged on the outer peripheral wall of the lower portion of the first pipe body 310 is beneficial to the selection of the stretchable strip 430 with as long length as possible, thereby ensuring the force acting on the liquid outlet pipe assembly 300 for upward resetting. Since the first annular mounting groove 210 is arranged on the outer peripheral wall of the upper end of the fixed sleeve 200 and the second annular mounting groove 311 is located inside the fixed sleeve 200, the stretchable strip 430 passes through the through opening 220 to extend from the outer periphery of the fixed sleeve 200 to the position of the second annular mounting groove 311.

[0030] Referring to Figure 2 and Figure 3 In some embodiments of the present application, the lower end of the first pipe body 310 is provided with an annular platform 312 which protrudes from the outer peripheral wall of the first pipe body 310, the outer peripheral wall of the first pipe body 310 is provided with a plurality of anti-escape blocks 313 which are located above the annular platform 312, the plurality of anti-escape blocks 313 are circumferentially distributed at intervals around the axis of the first pipe body 310, and the anti-escape blocks 313 and the annular platform 312 define the second annular mounting groove 311. It is to be noted that when the lower mounting ring 420 is assembled in the second annular mounting groove 311, the lower mounting ring 420 moves downwardly along the outer peripheral wall of the first pipe body 310 and passes over the anti-escape blocks 313, in the process of passing over the anti-escape blocks 313, the lower mounting ring 420 is elastically deformed radially outwardly, and when the lower mounting ring 420 enters the second annular mounting groove 311 and abuts against the upper surface of the annular platform 312, the lower mounting ring 420 will not move up and down.

[0031] Referring to Figure 3In some embodiments of the present application, the anti-escape block 313 is provided with a guide slope 314 for guiding the lower mounting ring 420 into the second annular mounting groove 311. The guide slope 314 is inclined outwardly in the radial direction of the first pipe body 310. When the lower mounting ring 420 moves downward along the outer peripheral wall of the first pipe body 310, the lower mounting ring 420 passes through the guide slope 314 to smoothly produce elastic deformation in the radial direction outwardly, so as to easily pass through the anti-escape block 313 to enter the second annular mounting groove 311, thereby reducing the assembly difficulty of the lower mounting ring 420.

[0032] Referring to Figure 3 In some embodiments of the present application, the upper mounting ring 410 and the lower mounting ring 420 are concentrically arranged, wherein the first annular mounting groove 210 is arranged on the outer peripheral wall of the upper end of the fixed sleeve 200, and the second annular mounting groove 311 is arranged on the outer peripheral wall of the lower portion of the first pipe body 310, so that the diameter of the upper mounting ring 410 is greater than the diameter of the lower mounting ring 420. The lower end of the stretch strip 430 is connected to the upper surface of the lower mounting ring 420, the upper end of the stretch strip 430 is arranged in the vertical direction, and the upper end of the stretch strip 430 is connected to the inner peripheral wall of the upper mounting ring 410 through a horizontal connecting portion 431. The through hole 220 penetrates the side wall of the fixed sleeve 200 in the up-down direction, and the horizontal connecting portion 431 is movable up and down along the through hole 220 to limit the extension and contraction stroke of the elastic stretching member 400. The stretch strip 430 of the elastic stretching member 400 with the above structure is arranged vertically, the elastic force of the stretch strip 430 is in the vertical direction, and effective driving force can be provided for the lifting movement of the liquid outlet pipe assembly 300.

[0033] Referring to Figure 3 In some embodiments of the present application, in order to provide stable rebound force, the stretch strip 430 is provided with a plurality of stretch strips 430 which are uniformly distributed in the circumferential direction around the axis of the liquid outlet pipe assembly 300. In this embodiment, two stretch strips 430 are symmetrically arranged on both sides of the axis of the liquid outlet pipe assembly 300.

[0034] Referring to Figure 2 In some embodiments of the present application, the upper end of the fixed sleeve 200 is provided with two arc-shaped baffles 230 which are oppositely arranged and extend upwardly. The outer peripheral wall of the arc-shaped baffle 230 can contact the inner peripheral wall of the upper mounting ring 410 to limit the upper mounting ring 410 from escaping from the fixed sleeve 200. It should be noted that when the elastic stretching member 400 drives the liquid outlet pipe assembly 300 to move upwardly, the upper mounting ring 410 has the risk of escaping upwardly from the first annular mounting groove 210, and the arc-shaped baffle 230 can limit the occurrence of this risk.

[0035] Referring to Figure 3 In some embodiments of the present application, in order to simplify the production process, the upper mounting ring 410, the lower mounting ring 420 and the stretch strip 430 are integrally formed of plastic. Specifically, the molten rubber can be injected into an injection mold to form the above elastic stretch member 400.

[0036] Referring to Figure 1 In some embodiments of the present application, the upper end of the liquid outlet pipe assembly 300 is connected with a pressing head 600, and the outer peripheral wall of the fixed sleeve 200 and the inner peripheral wall of the body 100 define a movable gap for the reciprocating lifting movement of the pressing head 600. It should be noted that the fixed sleeve 200 replaces the locking cap of a general pressing pump, and the outer peripheral wall of the fixed sleeve 200 and the inner peripheral wall of the body 100 only need to provide a lifting movement for the pressing head 600, so the movable gap can be set to a small size, which is beneficial to reduce the radial size of the pressing pump, further reduce the material cost, and reduce the packaging and transportation cost.

[0037] The technical features of the above embodiments can be combined in any manner. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0038] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A stretch-back squeeze pump characterized by, The utility model relates to a stretch rebound type press pump, including: The body (100) is internally provided with a pump cavity (110); The fixed sleeve pipe (200) is located in the upper portion of the body (100) and is located in the pump cavity (110); The liquid outlet pipe assembly (300) is movably arranged in the fixed sleeve pipe (200), and the lower portion of the liquid outlet pipe assembly (300) is connected with a piston (500) matched with the inner circumferential wall of the pump cavity (110); The elastic stretching piece (400) is composed of plastic material, the upper end of the elastic stretching piece (400) is connected with the fixed sleeve (200) or the body (100), and the lower end of the elastic stretching piece (400) is connected with the liquid outlet pipe assembly (300); the elastic stretching piece (400) comprises an upper mounting ring (410), a lower mounting ring (420) and a stretching strip (430) connected between the upper mounting ring (410) and the lower mounting ring (420), the fixed sleeve (200) is provided with a first annular mounting groove (210) matched with the upper mounting ring (410), the liquid outlet pipe assembly (300) is provided with a second annular mounting groove (311) matched with the lower mounting ring (420), and the stretching strip (430) can be elastically moved in the gap between the fixed sleeve (200) and the liquid outlet pipe assembly (300); the liquid outlet pipe assembly (300) comprises a first pipe body (310) movably penetrating the fixed sleeve (200) and a second pipe body (320) connected with the first pipe body (310) and extending downward, the piston (500) is movably arranged between the lower end of the first pipe body (310) and the lower part of the second pipe body (320), the first annular mounting groove (210) is arranged on the outer peripheral wall of the upper end of the fixed sleeve (200), the second annular mounting groove (311) is arranged on the outer peripheral wall of the lower part of the first pipe body (310), the side wall of the fixed sleeve (200) is provided with a through hole (220) communicating with the internal passage thereof, the stretching strip (430) passes through the through hole (220) to connect the upper mounting ring (410) and the lower mounting ring (420); the lower end of the first pipe body (310) is provided with an annular platform (312) protruding from the outer peripheral wall of the first pipe body (310), the outer peripheral wall of the first pipe body (310) is provided with a plurality of anti-disengagement blocks (313) located above the annular platform (312), the plurality of anti-disengagement blocks (313) are circumferentially distributed at intervals around the axis of the first pipe body (310), and the anti-disengagement blocks (313) and the annular platform (312) define the second annular mounting groove (311); the anti-disengagement blocks (313) are provided with guide slopes (314) for guiding the lower mounting ring (420) into the second annular mounting groove (311), and the guide slopes (314) are inclined outward along the radial direction of the first pipe body (310) in the direction from top to bottom; the upper end of the fixed sleeve (200) is provided with two oppositely arranged and upwardly extending arc-shaped baffles (230), and the outer peripheral wall of the arc-shaped baffles (230) can contact the inner peripheral wall of the upper mounting ring (410) to limit the upper mounting ring (410) from disengaging from the fixed sleeve (200).The upper end of the liquid outlet pipe assembly (300) is connected with a press head (600), and the outer peripheral wall of the fixed sleeve (200) and the inner peripheral wall of the body (100) define a movable gap for the reciprocating lifting movement of the press head (600).

2. The stretch rebound type press pump according to claim 1, wherein: The upper mounting ring (410) and the lower mounting ring (420) are concentrically arranged, and the diameter of the upper mounting ring (410) is greater than that of the lower mounting ring (420); the lower end of the stretch bar (430) is connected to the upper surface of the lower mounting ring (420), the upper end of the stretch bar (430) is arranged in a vertical direction, and the upper end of the stretch bar (430) is connected to the inner circumferential wall of the upper mounting ring (410) through a horizontal connecting portion (431); the through hole (220) penetrates the side wall of the fixed sleeve pipe (200) in an up-down direction, and the horizontal connecting portion (431) can move up and down along the through hole (220) to limit the stretching stroke of the elastic stretch member (400).

3. The stretch rebound type press pump according to claim 2, wherein: The stretch bar (430) is provided with a plurality of stretch bars (430) which are uniformly distributed in a circumferential direction around the axis of the liquid outlet pipe assembly (300).

4. The stretch rebound type press pump according to claim 1, wherein: The upper mounting ring (410), the lower mounting ring (420) and the stretch bar (430) are an integral plastic structure.

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