CN212868596U - One-way valve at liquid suction end - Google Patents

Abstract

The utility model discloses an imbibition end check valve, include: the valve core comprises a valve core body and a spring assembly, the spring assembly comprises a ring body and at least two plastic springs, and a sealing ring is embedded in the mounting groove; the middle part of the valve cover is provided with a limiting hole, and the upper surface and/or the side surface of the valve cover is/are provided with a plurality of water through holes; the limiting rod is vertically arranged on the upper surface of the valve core; the middle part of the valve seat is provided with a mounting hole penetrating through the upper surface and the lower surface, the hole wall of the mounting hole is provided with an inclined ring surface, and the sealing ring can be abutted against the inclined ring surface and can be placed on the inclined ring surface; the valve core is detachably connected with the valve seat. Make spring, case and sealing washer integrative, reduced the assemble duration of spare part on the one hand, reduced the assembly degree of difficulty of spare part, the assembly process need not to use auxiliary fixtures, and on the other hand spring adopts plastics to make, has effectively avoidd the problem that the medicament corrodes the spring, greatly reduced manufacturing cost, good application prospect and application scope have.

Description

One-way valve at liquid suction end

Technical Field

The utility model relates to a check valve technical field, more specifically the imbibition end check valve that says so relates to.

Background

Check valve has obtained general application in the one-way imbibition field of medicament, and common check valve includes casing, lower casing, case and metal spring, and the metal spring is located between casing and the case, and it has following problem:

1. the medicament has corrosiveness, most metal springs have poor corrosion resistance, corrosion-resistant alloy springs are required, and the manufacturing cost of the alloy springs is high.

2. The metal spring needs to be assembled with tools in an auxiliary mode, the assembling steps are complex and time-consuming, and the replacement and maintenance are also very inconvenient if needed in the later period.

Therefore, how to provide a liquid suction end check valve which partially or completely solves the technical problems is a problem which needs to be solved by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the above-mentioned technical problem among the prior art to a certain extent at least.

Therefore, an object of the present invention is to provide a liquid suction end check valve, including:

the valve core comprises a valve core body and a spring assembly, the valve core body extends downwards and contracts inwards to form a contraction part, and the periphery of the valve core body is inwards sunken to form an installation groove; the spring assembly comprises a ring body and at least two plastic springs, one end of each plastic spring is fixedly connected with the upper surface of the valve core, and the other end of each plastic spring is fixedly connected with the lower surface of the ring body;

the sealing ring is embedded in the mounting groove;

the middle part of the valve cover is provided with a limiting hole, and the upper surface and/or the side surface of the valve cover is/are provided with a plurality of water through holes;

the limiting rod is vertically arranged on the upper surface of the valve core, the upper end of the limiting rod penetrates through the limiting hole, and the limiting rod is matched with the limiting hole in shape;

the middle part of the valve seat is provided with a mounting hole penetrating through the upper surface and the lower surface, the hole wall of the mounting hole is provided with an inclined ring surface, and the sealing ring can be abutted against the inclined ring surface and can be placed on the inclined ring surface; the valve core is detachably connected with the valve seat.

The utility model has the advantages that: make spring, case and sealing washer integrative, reduced the assemble duration of spare part on the one hand, reduced the assembly degree of difficulty of spare part, the assembly process need not to use auxiliary fixtures, and on the other hand spring adopts plastics to make, has effectively avoidd the problem that the medicament corrodes the spring, greatly reduced manufacturing cost, good application prospect and application scope have.

In the technical scheme, except the sealing ring, other parts can be made of plastics, the adopted plastic raw materials can be flexibly adjusted according to the acid-base property of the medicament, and the integral corrosion resistance of the check valve is improved.

Further, the surface of valve gap is provided with joint portion, the surface of disk seat is provided with block portion, joint portion with block portion can the adaptation joint.

The valve cover is pressed down to drive the ring body, the plastic spring and the valve core to move downwards together, the spring compresses and applies downward pressure to the valve core to enable the sealing ring to be in close contact with the inclined ring surface, and at the moment, the valve cover is connected with the valve seat in a matched and clamped mode.

Preferably, the plastic spring is in a "C" shape. The compression of the plastic spring can generate a compression surface, in order to avoid the contact friction between the compression surface and the limiting rod, the compression surface should be close to the edge of the upper surface of the valve core as much as possible, taking a C-shaped spring as an example, the compression surface only has an upper part and a lower part after being compressed, the upper part and the lower part can be overlapped after being compressed, and the overlapped part after being compressed is only close to the edge of the upper surface of the valve core.

Preferably, the plastic springs are two and are symmetrically arranged relative to the limiting rod. The symmetrical plastic springs can ensure that the valve core is stressed uniformly and not misplaced, and the stability is better.

Preferably, the hole wall of the mounting hole comprises a first hole wall, an inclined ring surface and a second hole wall which are sequentially connected, the first hole wall and the second hole wall are both vertically arranged, and the inner diameter of the second hole wall is smaller than that of the first hole wall.

After the plastic spring is compressed, the whole or most of the telescopic end of the valve core is positioned in the area of the second hole wall, the sealing ring is tightly attached to the inclined ring surface, and the valve core part above the sealing ring is positioned in the area of the first hole wall.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of an explosive structure;

FIG. 2 is a schematic cross-sectional view of the valve cover clamped to the valve seat;

FIG. 3 is a schematic view of the surface structure of the valve cover clamped to the valve seat;

fig. 4 is a schematic diagram of the valve core and the sealing ring.

The valve core comprises a valve core body 1, a mounting groove 101, a contraction part 102, a spring assembly 2, a ring body 201, a plastic spring 202, a sealing ring 3, a valve cover 4, a limiting hole 401, a water passing hole 402, a limiting rod 5, a valve seat 6, a mounting hole 601, a first hole wall 6011, an inclined ring surface 6012 and a second hole wall 6013.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The embodiment of the utility model discloses imbibition end check valve, include:

the valve core comprises a valve core body 1 and a spring assembly 2, wherein the valve core body 1 extends downwards and contracts inwards to form a contraction part 102, and the outer periphery of the valve core body 1 is inwards sunken to form a mounting groove 101; the spring assembly 2 comprises a ring body 201 and at least two plastic springs 202, one end of each plastic spring 202 is fixedly connected with the upper surface of the valve core, and the other end of each plastic spring 202 is fixedly connected with the lower surface of the ring body 201;

the sealing ring 3 is embedded in the mounting groove 101;

the valve cover 4 is provided with a limiting hole 401 in the middle, and a plurality of water through holes 402 are formed in the upper surface and/or the side surface of the valve cover 4;

the limiting rod 5 is vertically arranged on the upper surface of the valve core, the upper end of the limiting rod 5 penetrates through the limiting hole 401, and the limiting rod 5 is matched with the limiting hole 401 in shape;

the valve seat 6 is characterized in that an installation hole 601 penetrates through the upper surface and the lower surface of the middle part of the valve seat 6, the hole wall of the installation hole 601 is provided with an inclined ring surface 6012, and the sealing ring 3 can abut against the inclined ring surface 6012 and can be placed on the inclined ring surface 6012; the valve core is detachably connected with the valve seat 6.

In some embodiments, the outer surface of the valve cover 4 is provided with a clamping portion, and the outer surface of the valve seat 6 is provided with a clamping portion, and the clamping portion can be in adaptive clamping connection.

In some embodiments, the plastic spring 202 is "C" shaped.

In some embodiments, there are two plastic springs 202 symmetrically disposed with respect to the stop rod 5. The symmetrical plastic springs 202 can ensure that the valve core is stressed uniformly and not misplaced, and the stability is better.

In some embodiments, the hole walls of the installation hole 601 include a first hole wall 6011, an inclined torus 6012, and a second hole wall 6013 that are sequentially connected, where the first hole wall 6011 and the second hole wall 6013 are both vertically disposed, and an inner diameter of the second hole wall 6013 is smaller than an inner diameter of the first hole wall 6011.

The specific using process is as follows:

as shown in fig. 3, in a normal state, the lower surface of the valve seat 6 is communicated with a medicament delivery position, the valve cover 4 and the valve seat 6 are in a clamping state, at this time, the valve cover 4 applies pressure to the ring body 201 to further compress the plastic spring 202 (primary compression), the lower end of the plastic spring 202 applies pressure to the valve core, so that the sealing ring 3 in the valve core mounting groove 101 is tightly abutted to the inclined ring surface 6012 in the valve seat 6, at this time, no gap exists between the sealing ring 3 and the mounting hole 601 of the valve seat 6, and the liquid medicament cannot flow into the valve seat 6 from the lower end of;

when the medicine needs to be supplied, the air above the valve cover 4 is evacuated by using a vacuum pump or other negative pressure equipment to form a vacuum area, a pressure difference from bottom to top is formed between the valve seat 6 and the valve cover 4, the valve core receives upward pressure, the plastic spring 202 is further compressed (secondary compression), the sealing ring 3 and the plastic spring 202 move upwards together, a gap is formed between the sealing ring 3 and the mounting hole 601, the medicine liquid enters the valve seat 6 from the gap, and then flows out from the water through hole 402 on the valve cover 4, and the water through hole 402 of the valve cover 4 is communicated to a medicine supply unit.

The utility model has the advantages that: make spring, case and sealing washer integrative, reduced the assemble duration of spare part on the one hand, reduced the assembly degree of difficulty of spare part, the assembly process need not to use auxiliary fixtures, and on the other hand spring adopts plastics to make, has effectively avoidd the problem that the medicament corrodes the spring, greatly reduced manufacturing cost, good application prospect and application scope have.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (5)

1. A fluid-aspirating end check valve, comprising:

the valve core comprises a valve core body (1) and a spring assembly (2), wherein the valve core body (1) extends downwards and contracts inwards to form a contraction part (102), and the outer periphery of the valve core body (1) is sunken inwards to form a mounting groove (101); the spring assembly (2) comprises a ring body (201) and at least two plastic springs (202), one end of each plastic spring (202) is fixedly connected with the upper surface of the valve core, and the other end of each plastic spring (202) is fixedly connected with the lower surface of the ring body (201);

the sealing ring (3) is embedded in the mounting groove (101);

the valve cover (4), the middle part of the valve cover (4) is provided with a limiting hole (401), and the upper surface and/or the side surface of the valve cover (4) is/are provided with a plurality of water through holes (402);

the limiting rod (5) is vertically arranged on the upper surface of the valve core, the upper end of the limiting rod (5) penetrates through the limiting hole (401), and the limiting rod (5) is matched with the limiting hole (401) in shape;

the sealing ring is characterized by comprising a valve seat (6), wherein a mounting hole (601) penetrates through the upper surface and the lower surface of the middle part of the valve seat (6), the hole wall of the mounting hole (601) is provided with an inclined ring surface (6012), and the sealing ring (3) can be abutted against the inclined ring surface (6012) and can be placed on the inclined ring surface (6012); the valve core is detachably connected with the valve seat (6).

2. A liquid suction end check valve according to claim 1, wherein the outer surface of the valve cover (4) is provided with a clamping portion, the outer surface of the valve seat (6) is provided with a clamping portion, and the clamping portion can be clamped in an adaptive manner.

3. A fluid end check valve as claimed in claim 1 wherein the plastic spring (202) is "C" shaped.

4. A fluid-aspirating end check valve according to claim 3, wherein the plastic spring (202) is two and is symmetrically arranged with respect to the stop lever (5).

5. A fluid-absorbing end check valve according to claim 1, wherein the hole wall of the mounting hole (601) comprises a first hole wall (6011), an inclined ring surface (6012) and a second hole wall (6013) which are sequentially connected, the first hole wall (6011) and the second hole wall (6013) are both vertically arranged, and the inner diameter of the second hole wall (6013) is smaller than that of the first hole wall (6011).

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