Airflow control valve component and liquid feeding and discharging device

Abstract

The invention discloses an airflow control valve component and a liquid feeding and discharging device, and the airflow control valve component comprises an air flow channel which is arranged on the pipe wall of an inner telescopic pipe, the lower end of the air flow channel forms an air inlet, and the upper end of the air flow channel penetrates through the peripheral surface of the inner telescopic pipe to form an air outlet; the air inlet is used for being connected with an air path system with an air pressure detection function; the valve mechanism is used for controlling the opening and closing of the air outlet; the pressure applying component is arranged on the inner telescopic pipe in a sleeving mode and can slide in the axial direction of the inner telescopic pipe, and the lower portion of the pressure applying component is used for making contact with hard residues at the bottom of the medicine tank; the elastic reset part is used for applying downward elastic force to the pressure applying part; the pressure applying component moves upwards in response to contact with the hard residues, the valve mechanism opens the air outlet in response to the upward movement of the pressure applying component, and the valve mechanism closes the air outlet in response to the downward movement of the pressure applying component.

Description

Technical Field

[0001] The present invention relates to the technical field of traditional Chinese medicine preparation, in particular to an airflow control valve component and a liquid supply and discharge device. Background Art

[0002] The applicant previously disclosed a drainage device, which is installed at the bottom of a tank body (the tank body is a medicine tank used to prepare traditional Chinese medicine supernatant). The drainage device is equipped with a telescopic tube assembly. The inner telescopic tube of the telescopic tube assembly is used to provide cleaning liquid into the tank body and to draw out supernatant liquid or discharge waste liquid from the tank body. During the process of drawing out the supernatant, the upper end of the inner telescopic tube is always located near the liquid level in the tank body, thereby improving the quality of the drawn supernatant.

[0003] The applicant encountered the following problems when using the above-mentioned liquid discharge device:

[0004] When the telescopic tube retracts to within the hard residue at the bottom as the level of the supernatant drops, the drug residue will be drawn out through the inner telescopic tube along with the supernatant, causing the drawn-out supernatant to mix. This is because the telescopic tube cannot detect the height of the hard residue. The applicant attempted to detect the hard residue by installing an optical component such as an infrared sensor at the upper end of the telescopic tube. However, due to the influence of the transmittance of light near the hard residue, the detection effect and accuracy were poor. Summary of the Invention

[0005] In view of the above technical problems existing in the prior art, embodiments of the present invention provide an airflow control valve component and a liquid supply and discharge device.

[0006] To solve the above technical problems, the technical solutions adopted in the embodiments of the present invention are:

[0007] An airflow control valve component is used to be installed on the outer side of the upper portion of an inner telescopic tube of a telescopic tube assembly, and the airflow control valve component includes:

[0008] a gas flow channel disposed on the wall of the inner telescopic tube, the lower end of the gas flow channel forming an air inlet, the upper end of the gas flow channel penetrating the outer circumference of the inner telescopic tube to form an air outlet, the air inlet being configured to connect to a gas circuit system having an air pressure detection function;

[0009] A valve mechanism for controlling the opening and closing of the gas outlet;

[0010] a pressure member, which is sleeved on the inner telescopic tube and can slide axially along the inner telescopic tube, wherein the lower portion of the pressure member is used to contact the hard residue at the bottom of the medicine tank;

[0011] an elastic reset component, which is used to apply a downward elastic force to the pressure-applying component; wherein:

[0012] The linkage relationship between the valve mechanism and the pressure-applying component is configured as follows:

[0013] The pressure member moves upward in response to contact with the hard residue, the valve mechanism opens the air outlet in response to the upward movement of the pressure member, and the valve mechanism closes the air outlet in response to the downward movement of the pressure member.

[0014] Preferably, the valve mechanism comprises: a valve block and a conical valve core; the valve block is fixed to the outer circumferential surface of the inner telescopic tube and corresponds to the air outlet; an axially penetrating conical valve hole is configured in the valve block, and the air outlet is radially connected to the conical valve hole; wherein:

[0015] The conical valve core matches the taper of the conical valve hole and penetrates the conical valve hole, and the elastic reset component is arranged between the pressure-applying component and the valve block;

[0016] The lower end of the conical valve core is fixedly connected to the pressure component. When the pressure component moves upward, the pressure component drives the conical valve core to move upward so that a gap is formed between the conical valve core and the conical valve hole, thereby allowing air to flow out from the air outlet.

[0017] Preferably, the pressure-applying component is configured as a lower ring plate, and the airflow control valve component further includes an upper ring plate; the upper ring plate is located above the valve port, and the upper end of the conical valve core passes through the upper ring plate.

[0018] Preferably, the upper ring plate is in sliding cooperation with the inner telescopic tube so as to be able to slide axially, and the upper end of the conical valve core is fixed to the upper ring plate.

[0019] Preferably, a silicone sleeve is provided between the peripheries of the upper ring plate and the lower ring plate to define a sealed air cavity with variable volume.

[0020] Preferably, the valve mechanism comprises two;

[0021] The air inlets are formed and extended in two along the circumferential direction, and the valve blocks of the two valve mechanisms correspond to the two air inlets respectively.

[0022] The present invention also discloses a liquid supply and discharge device, including a telescopic tube assembly, wherein the telescopic tube assembly includes a fixed tube, an intermediate telescopic tube located on the inner side of the fixed tube, and an inner telescopic tube located on the inner side of the intermediate telescopic tube, the upper part of the inner telescopic tube being located in the medicine tank, and is characterized in that the liquid supply and discharge device also includes the above-mentioned airflow control valve component, which is installed on the upper part of the inner telescopic tube.

[0023] Compared with the prior art, the airflow control valve component and the liquid supply and discharge device disclosed in the present invention have the following beneficial effects:

[0024] The present invention uses an airflow control valve component to detect whether the upper end of the inner telescopic tube moves down to the height of the hard residue, thereby preventing the mixed liquid from being drawn out and mixing with the drawn out supernatant liquid, and has high detection accuracy and reliability.

[0025] This disclosure is an overview of various implementations or examples of the technology, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar components. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the description and claims, serve to illustrate the embodiments of the invention. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive of the embodiments of the present apparatus or method.

[0027] Figure 1 This is a main cross-sectional view of a liquid supply and discharge device provided by an embodiment of the present invention.

[0028] Figure 2 for Figure 1 An enlarged view of part A (the air outlet is closed).

[0029] Figure 3 for Figure 1 An enlarged view of detail A (the air outlet is opened).

[0030] Reference numerals:

[0031] 100-valve component; 10-valve mechanism; 11-valve block; 111-conical valve hole; 12-conical valve core; 21-lower ring plate; 22-upper ring plate; 23-silicone sleeve; 30-reset spring; 40-gas flow channel; 41-gas outlet; 200-liquid supply and discharge device; 201-fixed pipe; 202-middle telescopic pipe; 203-inner telescopic pipe; 204-spray ball; 300-medicine tank; 400-hard residue. DETAILED DESCRIPTION

[0032] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0033] In order to keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted.

[0034] like Figures 1 to 3 As shown, an embodiment of the present invention discloses an airflow control valve component 100 and a liquid supply and discharge device 200 equipped with the valve component 100. The liquid supply and discharge device 200 is installed at the bottom of a medicine tank 300 to supply liquid to the medicine tank 300 or to drain the supernatant in the medicine tank 300. The liquid discharge device also includes a telescopic tube assembly.

[0035] The telescopic tube assembly includes a fixed tube 201, an intermediate telescopic tube 202 located inside the fixed tube 201, and an inner telescopic tube 203 located inside the intermediate telescopic tube 202. The upper end of the fixed tube 201 has a chuck for fixed connection with the bottom of the medicine tank 300. The upper end of the inner telescopic tube 203 is installed with a spray ball 204 and a drain valve. The spray ball 204 is used to provide cleaning liquid to the medicine tank 300, and the drain valve is used to gradually draw out the supernatant.

[0036] During the process of drawing out the supernatant, the middle telescopic tube 202 and the inner telescopic tube 203 retract as the liquid level of the supernatant drops, so that the supernatant near the liquid surface can always be discharged. Preferably, the middle telescopic tube 202 and the inner telescopic tube 203 are extended and retracted with the help of pressurized gas provided by the air circuit system.

[0037] The valve component 100 is installed on the upper part of the inner telescopic tube 203. The valve component 100 is used to detect whether the discharge valve (or discharge port) of the retracting inner telescopic tube 203 is close to the height where the hard residue 400 is located. If it is detected that the discharge port of the inner telescopic tube 203 is close to the height where the hard residue 400 is located, the telescopic tube assembly is controlled to stop retracting to prevent turbid liquid near the hard residue 400 from being drawn out through the discharge port to contaminate the drawn out supernatant liquid, and to prevent the upper end of the inner telescopic tube 203 from colliding with the hard residue 400.

[0038] The valve component 100 includes: a gas flow channel 40 , a lower ring plate 21 (serving as a pressure-applying component), an upper ring plate 22 , a return spring 30 , a valve mechanism 10 and a silicone sleeve 23 .

[0039] A gas flow channel 40 is formed in the wall of the inner telescopic tube 203 and extends axially. The lower end of the gas flow channel 40 forms an air inlet, which is connected to the piping of the gas system. The piping of the gas system is equipped with a pressure detection component for detecting pressure changes in the gas supplied to the air inlet. The upper end of the gas flow channel 40 forms an air outlet 41 that extends through the outer circumference of the upper portion of the inner telescopic tube 203.

[0040] The lower ring plate 21 is sleeved on the upper part of the inner telescopic tube 203 and is located below the air outlet 41. The lower ring plate 21 is sealed with the inner telescopic tube 203 through a sealing ring and can slide up and down. The upper ring plate 22 is sleeved on the upper part of the inner telescopic tube 203 and is located above the air outlet 41. The upper ring plate 22 is sealed with the inner telescopic tube 203 through a sealing ring and can slide up and down. The silicone sleeve 23 is arranged around the outer periphery of the upper ring plate 22 and the lower ring plate 21, and together with the upper ring plate 22 and the lower ring plate 21, forms an air cavity around the outer periphery of the air outlet 41. Since the silicone sleeve 23 can produce elastic expansion and contraction, the enclosed air cavity is a variable-volume air cavity, and the variable air cavity isolates the liquid in the medicine tank 300 from the air outlet 41.

[0041] The valve mechanism 10 includes a valve block 11 and a tapered valve core 12; the valve block 11 is fixed to the outer circumference of the inner telescopic tube 203 and is opposite to the air outlet 41. A tapered valve hole 111 is opened on the valve block 11. The tapered valve hole 111 axially penetrates the upper and lower parts of the valve block 11. The air outlet 41 is connected to the middle part of the tapered valve hole 111 through a radial channel. The tapered valve core 12 axially penetrates the tapered valve hole 111, and the upper end of the tapered valve core 12 extends out of the axial section of the valve block 11 and is fixed to the upper ring plate 22. The lower end of the conical valve core 12 extends out of the axial section of the valve block 11 and is fixed to the lower ring plate 21. The taper of the conical valve hole 111 is consistent with the taper of the conical valve core 12. Therefore, by applying a downward force to the conical valve core 12, it seals with the conical valve hole 111, thereby restricting the gas from the gas outlet 41 from entering the air cavity. By moving the conical valve core 12 upward, a gap is formed between the conical valve core 12 and the conical valve hole 111, thereby allowing the gas from the gas outlet 41 to enter the air cavity. The return spring 30 is sleeved outside the lower end of the conical valve core 12 and is interposed between the valve block 11 and the lower ring plate 21. The return spring 30 applies a downward elastic force to the lower ring plate 21, thereby sealing the conical valve core 12 and the conical valve hole 111. Preferably, there are two valve mechanisms 10 , which are located on both sides of the outer circumference of the inner telescopic tube 203 , and two air outlets 41 are arranged along the circumference of the inner telescopic tube 203 to correspond to the two valves.

[0042] When using, Figure 2 As shown, when the lower ring plate 21 moves downward with the inner telescopic tube 203 and has not yet come into contact with the hard residue 400, the return spring 30 pushes the conical valve core 12 downward to make the conical valve core 12 and the conical valve hole 111 of the valve block 11 seal and cooperate, which is equivalent to closing the gas outlet 41. As a result, the gas flow channel 40 and the pipeline of the gas system are in a high-pressure state. The pressure detection component detects this pressure state and can determine that the upper end of the inner telescopic tube 203 has not yet approached the height of the hard residue 400, and the cleanliness of the supernatant drawn out is reliable. Figure 3 As shown, when the lower ring plate 21 moves downward until it contacts the hard residue 400, the lower ring plate 21 moves upward relative to the valve block 11, driving the conical valve core 12 upward relative to the valve block 11. This creates a gap between the conical valve core 12 and the conical valve hole 111, thereby opening the gas outlet 41. This depressurizes the gas flow channel 40 and the gas system pipeline, reducing the pressure. The pressure detection component detects this pressure state and determines that the upper end of the inner telescopic tube 203 is close to the hard residue 400. In this way, the inner telescopic tube 203 can be controlled to stop moving downward to prevent the discharge of turbid liquid, thereby preventing the discharge of turbid liquid from contaminating the already discharged supernatant liquid. When the gas outlet 41 is opened, the silicone sleeve 23 expands compliantly to suppress the increase in air pressure within the air cavity, thereby preventing the impact on instantaneous pressure relief.

[0043] In addition, although exemplary embodiments have been described in the present invention, the scope includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., solutions that intersect various embodiments), adaptations, or changes. The elements in the claims are to be interpreted broadly based on the language used in the claims and are not limited to the examples described in this specification or during the prosecution of this application, which examples are to be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered as examples only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.

[0044] The above description is intended to be illustrative and not restrictive. For example, the above examples (or one or more of their solutions) can be used in combination with each other. For example, a person of ordinary skill in the art may use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features can be grouped together to simplify the present invention. This should not be interpreted as an intention that a disclosed feature that is not required to be protected is necessary for any claim. On the contrary, the subject matter of the present invention may be less than all the features of a specific disclosed embodiment. Thus, the following claims are incorporated into the specific embodiments as examples or embodiments, wherein each claim is independently a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the present invention should be determined with reference to the appended claims and the full scope of equivalents to which these claims are entitled.

[0045] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present invention.

Claims

1. An airflow control valve component, characterized in that: The airflow control valve component is used to be installed on the outer side of the upper portion of the inner telescopic tube of the telescopic tube assembly, and the airflow control valve component includes: a gas flow channel disposed on the wall of the inner telescopic tube, the lower end of the gas flow channel forming an air inlet, the upper end of the gas flow channel penetrating the outer circumference of the inner telescopic tube to form an air outlet, the air inlet being configured to connect to a gas circuit system having an air pressure detection function; A valve mechanism for controlling the opening and closing of the gas outlet; a pressure member, which is sleeved on the inner telescopic tube and can slide axially along the inner telescopic tube, wherein the lower portion of the pressure member is used to contact the hard residue at the bottom of the medicine tank; an elastic reset component, which is used to apply a downward elastic force to the pressure-applying component; wherein: The linkage relationship between the valve mechanism and the pressure-applying component is configured as follows: The pressure member moves upward in response to contact with the hard residue, the valve mechanism opens the air outlet in response to the upward movement of the pressure member, and the valve mechanism closes the air outlet in response to the downward movement of the pressure member.

2. The airflow control valve component according to claim 1, characterized in that The valve mechanism includes: a valve block and a conical valve core; the valve block is fixed to the outer circumferential surface of the inner telescopic tube and corresponds to the air outlet; an axially penetrating conical valve hole is configured in the valve block, and the air outlet is radially connected to the conical valve hole; wherein: The conical valve core matches the taper of the conical valve hole and penetrates the conical valve hole, and the elastic reset component is arranged between the pressure-applying component and the valve block; The lower end of the conical valve core is fixedly connected to the pressure component. When the pressure component moves upward, the pressure component drives the conical valve core to move upward so that a gap is formed between the conical valve core and the conical valve hole, thereby allowing air to flow out from the air outlet.

3. The airflow control valve component according to claim 2, characterized in that The pressure-applying component is configured as a lower ring plate, and the airflow control valve component further includes an upper ring plate; the upper ring plate is located above the valve port, and the upper end of the conical valve core penetrates the upper ring plate.

4. The airflow control valve component according to claim 3, characterized in that The upper ring plate is slidably matched with the inner telescopic tube so as to be able to slide axially, and the upper end of the conical valve core is fixed to the upper ring plate.

5. The airflow control valve component according to claim 4, characterized in that A silicone sleeve is provided between the peripheries of the upper ring plate and the lower ring plate to define a sealed air cavity with variable volume.

6. The airflow control valve component according to claim 2, characterized in that The valve mechanism includes two; The air inlets are formed and extended in two along the circumferential direction, and the valve blocks of the two valve mechanisms correspond to the two air inlets respectively.

7. A liquid supply and discharge device, comprising a telescopic tube assembly, the telescopic tube assembly comprising a fixed tube, an intermediate telescopic tube located inside the fixed tube, and an inner telescopic tube located inside the intermediate telescopic tube, wherein the upper portion of the inner telescopic tube is located in a medicine tank, characterized in that: The liquid supply and discharge device further comprises an airflow control valve component according to any one of claims 1 to 6, wherein the airflow control valve component is mounted on an upper portion of the inner telescopic tube.

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