Liquid feeding and discharging valve device

Abstract

The utility model discloses a liquid feeding and discharging valve device which is arranged on the upper portion of an inner pipe of a telescopic pipe assembly extending into a medicine tank from the bottom of the medicine tank, the liquid feeding and discharging valve device comprises an air cylinder which is fixed inside the upper portion of the inner pipe and comprises a cylinder body, a piston rod and a spring, the lower end of the piston rod is located in the cylinder body and provided with a piston, the piston divides the interior of the cylinder body into a lower cavity and an upper cavity, and the spring is located in the upper cavity and used for applying downward elastic force to the piston; the sealing plug is arranged above the upper end opening of the inner pipe and used for sealing the upper end opening of the inner pipe or opening the upper end opening, and the upper end of the piston rod is connected to the sealing plug; the air channel extends upwards from the lower end of the inner pipe and is connected to the lower cavity of the air cylinder.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of traditional Chinese medicine preparation, especially to a valve device for controlling liquid feeding and discharging at the bottom of a medicine tank. BACKGROUND

[0002] In the prior art, the following process exists in the preparation of traditional Chinese medicine:

[0003] The traditional Chinese medicine materials are placed in the tank body, then the traditional Chinese medicine materials are stirred in the tank body, and then the tank body is allowed to stand, so that supernatant is formed in the tank body, and the supernatant is pumped out by a suction pipe arranged at the top of the tank body and extending into the tank body, so as to prepare traditional Chinese medicine by using the supernatant.

[0004] However, due to the different liquid levels of the interface between the supernatant and the lower residue caused by different types of traditional Chinese medicine raw materials and different amounts of traditional Chinese medicine raw materials, different lengths of suction pipes need to be selected for pumping according to different interface liquid levels in order to maximize the pumping of supernatant and avoid pumping residue, which inevitably leads to the need to frequently replace suction pipes of different lengths, thereby causing complicated operation and reducing the efficiency of traditional Chinese medicine preparation.

[0005] To solve the above problems, the applicant provides a liquid discharging device (patent application number 202211711578.9), which is configured to extend into the medicine tank from the bottom of the medicine tank and can be telescopic. The inner tube in the pipe assembly is used to discharge the supernatant in the medicine tank, and is telescopic to adapt to the change of the supernatant in the medicine tank. The inner tube can also provide liquid (such as cleaning liquid) to the medicine tank. The upper part of the inner tube is also provided with a valve part, which is used to control the opening and closing of the upper part of the inner tube to control the liquid, and the telescopic action of the pipe assembly and the valve part is driven by gas, thereby avoiding the use of mechanical and electrical drive.

[0006] However, the valve part in the above-mentioned liquid discharging device has the following defects when in use:

[0007] 1. When the valve part is in the open state, the flow area defined by the valve port is small, so the resistance to fluid is large.

[0008] 2. The opening and closing action of the valve part is completed by two air chambers, which increases the complexity of pneumatic control.

[0009] 3. The valve core closes the valve port from the bottom of the valve port, which is easily affected by the gravity of the liquid in the medicine tank, causing the valve port to close tightly. UTILITY MODEL CONTENTS

[0010] In view of the above technical problems existing in the prior art, the embodiments of the utility model provide a liquid feeding and discharging valve device.

[0011] To solve the above technical problems, the technical scheme adopted by the embodiment of the utility model is

[0012] A liquid feeding and discharging valve device is installed at the upper portion of an inner tube of a telescopic tube assembly which extends into a medicine tank from the bottom of the medicine tank, and comprises:

[0013] A cylinder is fixed to the inside of the upper portion of the inner tube, and comprises a cylinder body, a piston rod and a spring, the lower end of the piston rod is located in the cylinder body and is provided with a piston, the piston divides the inside of the cylinder body into a lower chamber and an upper chamber, and the spring is located in the upper chamber to apply a downward elastic force to the piston;

[0014] A blocking plug is arranged above the upper port of the inner tube to block or open the upper port of the inner tube, and the upper end of the piston rod is connected to the blocking plug;

[0015] An air passage extends upward from the lower end of the inner tube and is connected to the lower chamber of the cylinder.

[0016] Preferably, the liquid feeding and discharging valve device further comprises a disc holder, the disc holder is provided with a plurality of ribs, and the ribs define a plurality of hollow portions allowing liquid to pass through; wherein:

[0017] The disc holder is transversely arranged in the inside of the upper portion of the inner tube, and the lower end of the cylinder body of the cylinder is fixed to the disc holder;

[0018] The air passage penetrates through the ribs and penetrates from the bottom of the cylinder body to the lower chamber.

[0019] Preferably, the plurality of ribs are arranged circumferentially, so that the plurality of hollow portions are arranged circumferentially, and the lower end of the cylinder body of the cylinder is fixed to the middle portion of the disc holder.

[0020] Preferably, the blocking plug comprises a body and a cover body with a tapered top which is buckled above the body.

[0021] Preferably, the bottom of the body is provided with a tapered surface, the upper port of the inner tube is provided with a tapered surface, and the tapered surface of the body is matched with the tapered surface of the upper port of the inner tube.

[0022] Preferably, the blocking plug is made of rubber material or the blocking plug is made of metal material.

[0023] Preferably, the air passage extending in the ribs of the disc holder penetrates to the bottom of the edge of the disc holder, and the air passage extending in the tube wall of the inner tube penetrates to the upper end of the tube wall and is connected to the air passage penetrating to the bottom of the edge of the disc holder.

[0024] Preferably, a flexible sheath is arranged between the cylinder body and the piston rod in the cylinder.

[0025] Preferably, a middle part of the plugging plug body is provided with a threaded hole, and a bottom of the cover body is provided with a threaded stud which is screwed into the threaded hole.

[0026] Preferably, an upper end of the piston rod passes through the body and is fastened by a nut.

[0027] Compared with the prior art, the liquid feeding and discharging valve device has the following beneficial effects:

[0028] 1. The upper port of the inner pipe is closed and opened by the plugging plug controlled by the cylinder, only one air cavity (lower chamber) is arranged in the cylinder, the plugging plug is controlled to move by the air cavity and the spring, so that the two air cavities are not used to control the plugging plug to move, and thus the pneumatic control process is simple.

[0029] 2. The plugging plug directly controls the opening and closing of the upper port of the inner pipe, and the through-flow section of the liquid passing through is not small after the upper port of the inner pipe is opened, so that the resistance to the liquid is small.

[0030] 3. The plugging plug has simple structure and low manufacturing cost.

[0031] The summary of various implementations or examples of the technology described in the present application is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0032] In the drawings which are not necessarily drawn to scale, like reference numerals can describe similar parts throughout the various views. Like reference numerals with an alphabetical suffix have been used to describe similar parts having different attributes. The drawings, together with the specification, demonstrate and describe various embodiments of the application, but the application is not to be limited or confined as to the arrangements, constructions, mechanisms, materials, or features illustrated or described. Wherever possible, the same reference numbers are used throughout the drawings to refer to the same or like elements. Such embodiments are illustrative and not intended to be exhaustive or exclusive, as modifications can occur to those skilled in the art, and such modifications are intended to be within the scope of the present application.

[0033] Figure 1 The installation state view of the liquid feeding and discharging valve device and the tank body provided by the embodiments of the present application.

[0034] Figure 2 The enlarged view of the partial A of the plugging plug closing the upper port of the inner pipe. Figure 1

[0035] Figure 3 The enlarged view of the partial A of the plugging plug opening the upper port of the inner pipe. Figure 1

[0036] Reference signs: ​​

[0037] 100 - liquid supply and discharge valve device; 10 - cylinder; 11 - cylinder body; 111 - lower chamber; 112 - upper chamber; 12 - piston rod; 121 - nut; 13 - piston; 14 - spring; 15 - flexible sheath; 20 - blocking plug; 21 - body; 22 - cover; 221 - stud; 31 - lower air passage; 32 - upper air passage; 40 - disc holder; 41 - rib; 42 - hollow part; 200 - telescopic tube assembly; 201 - inner tube; 2011 - upper port; 300 - medicine tank; 301 - tank bottom. DETAILED DESCRIPTION

[0038] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the ordinary meaning as understood by a person having ordinary skill in the art to which the present application pertains. The terms "first", "second", and similar terms are not intended to denote any order, quantity, or importance, but are merely used to distinguish one element from another. The terms "include", "comprise", and similar terms are intended to encompass the elements listed after the terms as well as equivalents thereof, and do not exclude other elements. The terms "connected" and "coupled" and similar terms are not limited to physical or mechanical connections or couplings, but can include electrical connections or couplings, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positions, and can change when the absolute positions of the described objects change.

[0039] In order to keep the following description of the embodiments of the present application clear and concise, detailed descriptions of known functions and known components are omitted.

[0040] As shown in Figure 1 Embodiments of the present application disclose a liquid supply and discharge valve device 100, which is used for being installed at an upper portion of an inner tube 201 of a telescopic tube assembly 200, the telescopic tube assembly 200 extends into a medicine tank 300 from a tank bottom 301 of the medicine tank 300, the telescopic tube assembly 200 discharges supernatant in the medicine tank 300 or supplies cleaning liquid for cleaning the medicine tank 300 into the medicine tank 300 by using the inner tube 201, and the liquid supply and discharge valve device 100 controls liquid supply and discharge by controlling opening and closing of an upper port 2011 of the inner tube 201.

[0041] As shown in Figures 1 to 3As shown, the liquid feeding and discharging device comprises a cylinder 10, a blocking plug 20 and a disc holder 40. The disc holder 40 is horizontally arranged in the upper portion of the inner tube 201, and a plurality of ribs 41 are arranged on the disc holder 40. Preferably, the plurality of ribs 41 are arranged in a circumferential direction, and each adjacent two ribs 41 define a hollow portion 42, so that the disc holder 40 has a plurality of hollow portions 42 arranged in a circumferential direction, which are used to allow the liquid to pass through the disc holder 40, so that the liquid can pass through the inner tube 201 to supply the cleaning liquid into the medicine jar 300 or discharge the supernatant in the medicine jar 300.

[0042] The cylinder 10 is vertically fixed to the middle portion of the disc holder 40. Specifically, the cylinder 10 comprises a cylinder body 11, a piston rod 12, a piston 13 and a spring 14. The lower end of the cylinder body 11 is fixed to the middle portion of the disc holder 40. The lower end of the piston rod 12 is located in the cylinder body 11. The piston 13 is installed at the lower end of the piston rod 12. The piston 13 divides the inner portion of the cylinder body 11 into an upper chamber 112 and a lower chamber 111. The spring 14 is arranged in the upper chamber 112 and is sleeved on the lower portion of the piston rod 12. The spring 14 is used to apply a downward elastic force to the piston 13. The upper end of the piston rod 12 protrudes out of the cylinder 10. Preferably, a flexible sheath 15 is arranged between the piston rod 12 and the cylinder body 11, which is used to prevent external liquid from entering the cylinder body 11 through the gap between the cylinder body 11 and the piston rod 12.

[0043] The blocking plug 20 is arranged above the upper port 2011 of the inner tube 201. The upper end of the piston rod 12 is connected to the bottom of the blocking plug 20. The blocking plug 20 is driven by the piston rod 12 to move up and down to open or close the upper port 2011 of the inner tube 201. Preferably, the blocking plug 20 comprises a body 21 and a cover 22 which is screwed on the upper portion of the body 21. Specifically, a threaded hole is formed in the middle portion of the body 21. A threaded stud 221 is arranged on the bottom of the cover 22. The cover 22 is screwed on the body 21 through the threaded stud 221. The upper end of the piston rod 12 is provided with a threaded rod which penetrates through the bottom of the body 21 and is locked by a nut. Preferably, the cover 22 is provided with a tapered top, so as to reduce the attachment of drug residues in the medicine jar 300 thereon and reduce the disturbance to the liquid when the blocking plug 20 moves up and down. The body 21 and the cover 22 of the blocking plug 20 can be made of a high polymer material such as rubber, a metal material such as stainless steel, or a composite of a high polymer and a metal material, for example, the body 21 and the cover 22 of the blocking plug 20 are made of a metal material inside and are covered by a high polymer outside. Preferably, the upper port 2011 of the inner tube 201 is provided with a tapered surface, and the bottom of the body 21 of the blocking plug 20 is provided with a tapered surface matched with the tapered surface of the upper port 2011 of the inner tube 201, so as to increase the stability and sealing performance of the blocking plug 20 in the closed state.

[0044] A gas passage is established between the lower end of the tube wall of the inner tube 201 and the lower chamber 111 of the air cylinder 10 for providing pressure gas to the lower chamber 111 of the air cylinder 10, so as to drive the piston 13 to move upward with the piston rod 12 and the sealing plug 20, in particular, the gas passage is divided into two parts, i.e., a lower gas passage 31 and an upper gas passage 32, the lower gas passage 31 extends from the lower end of the tube wall of the inner tube 201 and penetrates to the upper end of the tube wall of the inner tube 201, the upper gas passage 32 extends in the rib 41 of the disc holder 40, and the two ends of the upper gas passage 32 penetrate to the lower chamber 111 of the air cylinder 10 and the bottom of the edge of the disc holder 40 respectively, so that the port of the upper gas passage 32 is connected and communicated with the port of the lower gas passage 31.

[0045] When it is needed to discharge or supply liquid into the medicine tank 300, pressure gas is supplied into the lower chamber 111 of the air cylinder 10 through the upper gas passage 32 and the lower gas passage 31 by using a gas source, as shown in the figure, the pressure gas drives the piston rod 12 to move upward with the sealing plug 20 to open the upper port 2011 of the inner tube 201, so that the liquid can be discharged or supplied into the medicine tank 300. Figure 3

[0046] When it is needed to close the upper port 2011 of the inner tube 201, the gas supply to the lower chamber 111 of the air cylinder 10 is stopped, at this time, as shown in the figure, the spring 14 in the air cylinder 10 is reset to drive the piston rod 12 and move the sealing plug 20 downward, thereby closing the upper port 2011 of the inner tube 201. Figure 2

[0047] The liquid supply and discharge valve device 100 provided by the utility model has the following advantages:

[0048] 1. The upper port 2011 of the inner tube 201 is closed and opened by using the air cylinder 10 to control the sealing plug 20, and only one gas cavity (the lower chamber 111) is arranged in the air cylinder 10, the sealing plug 20 is controlled to move by using the gas cavity and the spring 14, so that two gas cavities are avoided to be used to control the sealing plug 20 to move, and thus the pneumatic control process is simple.

[0049] 2. The opening and closing of the upper port 2011 of the inner tube 201 is directly controlled by the sealing plug 20, after the upper port 2011 of the inner tube 201 is opened, the flow passage cross section allowing the liquid to pass through is not small, and thus the resistance to the liquid is small.

[0050] 3. The sealing plug 20 provided by the utility model has a simple structure and low manufacturing cost.

[0051] ​​Furthermore, although example embodiments have been described herein, the scope of coverage of this patent document extends to any and all embodiments having equivalent elements, modifications, omissions, combinations (for example, of aspects across various embodiments), adaptations and / or alterations as would be known to one skilled in the art based on this disclosure and the associated drawings. The limitations in the claims are to be interpreted broadly based on the language read in the light of the preceding description. The examples are to be considered non-exhaustive as described above. Accordingly, the true scope and spirit of the disclosure are indicated by the following claims and their full scope of equivalents, regardless of their formulation, presentation or recitation. Claims, in appropriate independent form, are hereby incorporated into this detailed description, in order to further clarify the application and convey its true scope and spirit.

[0052] The above description is intended to be illustrative, and not restrictive. For example, the above-described examples (or one or more aspects thereof) can be used in combination with each other. Other embodiments will be apparent to those of ordinary skill in the art upon reviewing the above description. Further, in the detailed description, various features can be grouped together to streamline the disclosure. This should not be interpreted as an intention that the claimed subject matter requires more features than are expressly identified in the claims. Rather, the inventive subject matter can be practiced with less than all features of a particular disclosed embodiment. Accordingly, the following claims are hereby incorporated into this detailed description, by way of examples or embodiments, in which each claim is independently a separate embodiment, and these embodiments can be combined with each other in various combinations or permutations, as would be understood by one of ordinary skill in the art. The scope of the subject matter of this application is intended to be measured by the broadest possible scope that can be afforded by the appended claims and their full range of equivalents.

[0053] The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements are also regarded as falling within the protection scope of the present application.

Claims

1. A liquid supply and discharge valve device characterized by comprising: The liquid feeding and discharging valve device is installed on the upper part of the inner tube of the telescopic tube assembly which extends into the medicine tank from the bottom of the medicine tank, and comprises: a cylinder fixed to the inside of the upper part of the inner tube, the cylinder comprising a cylinder body, a piston rod and a spring, the lower end of the piston rod being located in the cylinder body and being provided with a piston, the piston dividing the inside of the cylinder body into a lower chamber and an upper chamber, the spring being located in the upper chamber for applying a downward elastic force to the piston; a blocking plug arranged above the upper port of the inner tube for blocking the upper port of the inner tube or opening the upper port, the upper end of the piston rod being connected to the blocking plug; an air passage extending upward from the lower end of the inner tube and being connected to the lower chamber of the cylinder.

2. The liquid supply / discharge valve device according to claim 1, characterized by The liquid feeding and discharging valve device further comprises a disc holder; the disc holder is provided with a plurality of ribs, and the ribs define a plurality of hollow parts allowing liquid to pass through; wherein: the disc holder is transversely arranged inside the upper part of the inner tube, and the lower end of the cylinder body of the cylinder is fixed to the disc holder; the air passage penetrates through the ribs and penetrates from the bottom of the cylinder body to the lower chamber.

3. The liquid supply / discharge valve device according to claim 2, characterized in that, The plurality of ribs are arranged circumferentially, so that the plurality of hollow parts are arranged circumferentially; the lower end of the cylinder body of the cylinder is fixed to the middle part of the disc holder.

4. The liquid supply / discharge valve device according to claim 1, wherein The blocking plug comprises a body and a cover with a tapered top arranged above the body.

5. The liquid supply / discharge valve device according to claim 4, wherein The bottom of the body is provided with a tapered surface, the upper port of the inner tube is provided with a tapered surface, and the tapered surface of the body is matched with the tapered surface of the upper port of the inner tube.

6. The liquid supply / discharge valve device according to claim 1, wherein The blocking plug is made of rubber material or the blocking plug is made of metal material.

7. The liquid supply / discharge valve device according to claim 2, wherein The air passage extending in the ribs of the disc holder penetrates to the bottom of the edge of the disc holder, and the air passage extending in the tube wall of the inner tube penetrates to the upper end of the tube wall and is connected to the air passage penetrating to the bottom of the edge of the disc holder.

8. The liquid supply / discharge valve device according to claim 1, wherein A flexible sheath is installed between the cylinder body and the piston rod in the cylinder.

9. The liquid supply / discharge valve device according to claim 4, wherein A threaded hole is formed in the middle part of the body of the blocking plug, the bottom of the cover is provided with a threaded stud, and the threaded stud is screwed into the threaded hole.

10. The liquid supply / discharge valve device according to claim 4, wherein The upper end of the piston rod penetrates through the body and is fastened by a nut.

Images