阅读说明：本技术 一种旋转阀板式护理用药液自控设备 (Liquid medicine automatic control equipment is used in panel nursing of rotary valve ) 是由 不公告发明人 于 2020-11-19 设计创作，主要内容包括：本发明提供了一种旋转阀板式护理用药液自控设备,包括壳体以及安装在壳体内的若干个伸缩阀,壳体配合腔的腔壁包括彼此相连的第一配合侧壁和第二配合侧壁；伸缩阀包括一对转盘,后转盘固定在转轴上,前转盘能转动地套在转轴上,后转盘正对前转盘的端面上开设有彼此平行的储蓄槽和T型滑槽,储蓄槽和T型滑槽的弧形结构的圆心与转盘的转动中心重合,在储蓄槽的槽底还设有若干注入口,该注入口连通外界的输入管,两转盘之间的端面能互相密封贴合；在前转盘内开设有盲孔结构的条形阀孔,该条形阀孔与一个贯穿前转盘两端面的始终连通所述储蓄槽的穿孔相交。本发明可以自动地实现药液的顺次、而定时长稳定输送,易于维护使用。(The invention provides rotary valve plate type automatic control equipment for liquid medicine for nursing, which comprises a shell and a plurality of telescopic valves arranged in the shell, wherein the wall of a matching cavity of the shell comprises a first matching side wall and a second matching side wall which are connected with each other; the telescopic valve comprises a pair of turntables, a rear turntable is fixed on the rotating shaft, a front turntable is rotatably sleeved on the rotating shaft, a storage groove and a T-shaped sliding groove which are parallel to each other are formed in the end face of the rear turntable, which is opposite to the front turntable, the circle centers of arc structures of the storage groove and the T-shaped sliding groove are superposed with the rotating center of the turntable, a plurality of injection ports are also formed in the bottom of the storage groove, the injection ports are communicated with an external input pipe, and the end faces between the two turntables can be mutually; the front rotary disc is internally provided with a strip-shaped valve hole with a blind hole structure, and the strip-shaped valve hole is intersected with a through hole which penetrates through two end faces of the front rotary disc and is always communicated with the storage groove. The invention can automatically realize the sequential and long-time stable delivery of the liquid medicine and is easy to maintain and use.)

1. The utility model provides a liquid medicine automatic control equipment is used in board-like nursing of rotary valve which characterized in that: comprises a shell and a plurality of telescopic valves arranged in the shell, wherein

The shell comprises a matching cavity for mounting the rotary disc, the cavity wall of the matching cavity comprises a first matching side wall and a second matching side wall which are connected with each other, and the surface of the first matching side wall is a section of smooth cylindrical surface;

the telescopic valves at least comprise two telescopic valves, and each telescopic valve comprises a pair of turntables which are opposite to each other and are arranged in a close fit manner, a valve rod and an elastic piece; the rotary table is of a circular plate-shaped structure and comprises a front rotary table and a rear rotary table which are concentrically arranged, the circle center of the rear rotary table is positioned on the circle center of the first matching side wall, so that one section of cylindrical side surface of the rear rotary table is in smooth contact with the first matching side wall, and a crescent-shaped gap is formed between the other cylindrical side surfaces of the rear rotary table and the second matching side wall; the rotary shaft of the rotary disc is mounted on the front end and the rear end of the shell in a rotating manner, wherein the rear rotary disc is fixed on the rotary shaft, the front rotary disc can be rotatably sleeved on the rotary shaft, a storage groove and a T-shaped sliding groove which are parallel to each other are formed in the end face of the rear rotary disc, which is opposite to the front rotary disc, the circle centers of the arc structures of the storage groove and the T-shaped sliding groove are superposed with the rotation center of the rotary disc, a plurality of injection ports are further arranged at the bottom of the storage groove, the injection ports are communicated with an external input pipe, and the end faces between; the front turntable is adjustably and fixedly arranged on the end surface of the rear turntable through the matching of a T-shaped bolt and the T-shaped sliding groove, so that the two turntables are connected into a whole; the rotary disc is internally provided with a bar-shaped valve hole with a blind hole structure, the bar-shaped valve hole is intersected with a through hole which penetrates through two end faces of the rotary disc and is always communicated with the storage groove, one end of the elastic piece is installed at the hole bottom of the valve hole, the other end of the elastic piece is connected with one end of the valve rod, the other end of the valve rod penetrates through the valve hole in a sliding fit manner and extends out of the rotary disc, the valve rod and the valve hole are matched only to allow the valve rod to axially slide but not to rotate, and the other end of the valve rod is always in contact with the cavity wall of a matching cavity of the shell under the pushing action of; the valve rod is also provided with a drainage hole penetrating through the valve rod, and the drainage hole is connected with an external discharge pipe;

when the pivot rotated, the other end of all valve rods in proper order with first cooperation lateral wall smooth contact and make the valve rod retract towards the valve opening in, and when the valve rod retracted towards the valve opening the drainage hole with perforation on the valve opening just to the intercommunication, and the other end of valve rod entered into can make perforation and drainage hole stagger completely when crescent form space is interior.

2. The rotary valve plate type medical liquid self-control equipment for nursing according to claim 1, characterized in that: the hole axis of the valve hole is arranged along the radial direction of the rotary disc, and the through hole in the valve hole is required to be arranged so that the through hole is still blocked by the valve rod when the valve rod extends out of the longest distance.

3. The rotary valve plate type medical liquid self-control equipment for nursing according to claim 1, characterized in that: the end face of the other end of the valve rod is hemispherical, the elastic piece is a cylindrical spring or a conical spring, and when the elastic piece is the conical spring, the large end of the conical spring is connected to the bottom of the valve hole.

4. The rotary valve plate type medical liquid self-control equipment for nursing according to claim 1, characterized in that: the valve rod is fixedly connected with a guide edge along the length direction on the surface, and the guide edge is in sliding fit with a guide sliding groove on the inner wall of the valve hole.

Technical Field

The invention relates to the field of medical treatment, in particular to rotary valve plate type automatic liquid medicine control equipment for nursing.

Background

In the medical industry, some liquid medicines need to be sequentially conveyed in batches and quantitatively, at present, a series of high-precision automatic control equipment is usually adopted for conveying the liquid medicines, the effect is good, the structure is complex, the number of matched components is large, the cost is high, common operators cannot automatically disassemble and maintain due to the professional electrical control of the operators, the operators can only call the operators to repair the liquid medicines on site when faults occur, the problems of work pause caused by after-sale delay are often encountered, and the conveying of the liquid medicines is very urgent. On the other hand, because of numerous electric elements, elements such as sensors or liquid crystal display panels have higher requirements on environmental temperature, humidity and the like, the use working conditions have higher requirements than mechanical control, and the wiring is more complicated; moreover, in practice, many liquid medicines do not need extremely high flow control precision, and the basic requirement is to realize sequential and quantitative delivery, while the existing control equipment has no reasonable object for economic use to be selected and used or has no spare tool to be replaced temporarily.

Disclosure of Invention

The invention aims to solve the problems of the prior art, provides rotary valve plate type nursing liquid medicine automatic control equipment, solves the problems of complex structure, high cost and inconvenient use and maintenance of automatic liquid medicine conveying control in the prior art, and is particularly suitable for occasions without frequent overhaul and maintenance.

In order to achieve the purpose, the invention adopts the following technical scheme:

a rotary valve plate type medical liquid automatic control device for nursing comprises a shell and a plurality of telescopic valves arranged in the shell, wherein,

the shell comprises a matching cavity for mounting the rotary disc, the cavity wall of the matching cavity comprises a first matching side wall and a second matching side wall which are connected with each other, and the surface of the first matching side wall is a section of smooth cylindrical surface;

the telescopic valves at least comprise two telescopic valves, and each telescopic valve comprises a pair of turntables which are oppositely arranged and closely attached to each other, an elastic part and a valve rod; the rotary table is of a circular plate-shaped structure and comprises a front rotary table and a rear rotary table which are concentrically arranged, the circle center of the rear rotary table is positioned on the circle center of the first matching side wall, so that one section of cylindrical side surface of the rear rotary table is in smooth contact with the first matching side wall, and a crescent-shaped gap is formed between the other cylindrical side surfaces of the rear rotary table and the second matching side wall; the rotary shaft of the rotary disc is mounted on the front end and the rear end of the shell in a rotating manner, wherein the rear rotary disc is fixed on the rotary shaft, the front rotary disc can be rotatably sleeved on the rotary shaft, a storage groove and a T-shaped sliding groove which are parallel to each other are formed in the end face of the rear rotary disc, which is opposite to the front rotary disc, the circle centers of the arc structures of the storage groove and the T-shaped sliding groove are superposed with the rotation center of the rotary disc, a plurality of injection ports are further arranged at the bottom of the storage groove, the injection ports are communicated with an external input pipe, and the end faces between; the front turntable is adjustably and fixedly arranged on the end surface of the rear turntable through the matching of a T-shaped bolt and the T-shaped sliding groove, so that the two turntables are connected into a whole; the rotary disc is internally provided with a bar-shaped valve hole with a blind hole structure, the bar-shaped valve hole is intersected with a through hole which penetrates through two end faces of the rotary disc and is always communicated with the storage groove, one end of the elastic piece is installed at the hole bottom of the valve hole, the other end of the elastic piece is connected with one end of the valve rod, the other end of the valve rod penetrates through the valve hole in a sliding fit manner and extends out of the rotary disc, the valve rod and the valve hole are matched only to allow the valve rod to axially slide but not to rotate, and the other end of the valve rod is always in contact with the cavity wall of a matching cavity of the shell under the pushing action of; the valve rod is also provided with a drainage hole which penetrates through the valve rod, and the drainage hole is connected with an external discharge pipe.

When the pivot rotated, the other end of all valve rods in proper order with first cooperation lateral wall smooth contact and make the valve rod retract towards the valve opening in, and when the valve rod retracted towards the valve opening the drainage hole with perforation on the valve opening just to the intercommunication, and the other end of valve rod entered into can make perforation and drainage hole stagger completely when crescent form space is interior.

During the concrete implementation, in order to facilitate keeping the input pipe to avoid winding when the carousel rotates to the stability and reliability that protection input pipe and connect, can be with the input pipe control including access pipeline section and output pipe section, wherein the input pipeline section is connected on the filling opening of back carousel, and the output pipe section is then connected on the memory of liquid medicine, and the axis of output pipe section is coaxial with the axis of carousel, promptly coaxial with the pivot. This configuration may also be used for the discharge pipes to avoid the corresponding pipes from becoming entangled during rotation.

In addition, as for the structure of the valve rod, the invention can also adopt the following structure to replace the structure: the valve rod is not provided with the drainage hole, but the rod section which is originally provided with the drainage hole on the valve rod is processed into a reduced rod neck part, namely the valve rod comprises two sections of sliding shafts with equal thickness and one section of connecting rod which is smaller than the sliding shafts, and the connecting rod is coaxially connected between the two sliding shafts to realize the integral fixed connection of the two sliding shafts.

Compared with the prior art, the invention has the following beneficial effects: the invention mainly adopts a mechanical control structure of relative rotation of the two turnplates for automatic control, has simple structure, easy manufacture and no professional sensor and liquid crystal display technology, so that common workers can automatically assemble, disassemble and maintain after knowing the structure once, can be used as liquid medicine control equipment with general precision requirements, and can also be used as temporary emergency equipment for standby. Specifically, the telescopic valve mainly comprises two turntables, wherein a front turnplate can be rotationally adjusted on a rear turnplate and used as a valve plate to control the sequential interval time of liquid medicine conveying between corresponding pipelines. Specifically, realize progressively opening or opening in the twinkling of an eye through the valve rod of telescopic valve and corresponding casing cooperation lateral wall, and the telescopic valve that sets up through a plurality of orders comes orderly realization to switch on (open), the order of setting up of telescopic valve has represented the intercommunication order of corresponding pipeline, and first cooperation lateral wall has then confirmed a rated full open time of all telescopic valves, the opening degree (the flow size that passes through) of telescopic valve has then been decided to some regions in crescent hole, thereby carry out effective automatic control from the opening order and the on-time of telescopic valve, several of it are simple and reliable, high practicality, owing to what adopt is the series connection setting, the telescopic valve quantity can increase wantonly, can apply to the more condition of carrying the purpose container quantity, the structure is also comparatively simple simultaneously.

In addition, the invention can be used for conveying liquid medicine, other liquid with similar work requirements, even gas, and has strong adaptability.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention taken in a cross-section perpendicular to the axis of rotation;

FIG. 2 is a schematic end view of the matching structure of the front rotary disk and the rear rotary disk of the front rotary disk cut away in FIG. 1;

FIG. 3 is a schematic end view of a rear turntable cooperating with the front turntable cut away in FIG. 1;

FIG. 4 is a schematic view of a connection structure of the input pipe;

FIG. 5 is a schematic view of a specific construction of the valve stem;

FIG. 6 is a schematic view of another embodiment of the valve stem;

FIG. 7 is a schematic structural diagram of an exemplary control mechanism according to the present invention;

FIG. 8 is a schematic view of the control mechanism in a non-operational state;

fig. 9 is an enlarged view of the return spring of fig. 8.

The device comprises a shell 1, a second matching side wall 101, a first matching side wall 102, a front rotary disc 201, a rear rotary disc 202, a rotating shaft 3, a guide rib 4, a valve rod 5, a drainage hole 6, an elastic piece 7, a perforation 8, a storage groove 9, a connecting rod 10, an input pipe 11, an access pipe 1101, an output pipe 1102, a storage 12, an injection port 13, a storage groove 14, a T-shaped bolt 16, a T-shaped sliding groove 17, a front support 19, a rear support 20, a base 21, a driving rod 22, a steel ball 23, a return spring 24, a limiting rod 25, an outer gear ring 26, a rack 27 and a pressure bearing plate 28.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the functions of the invention clearer and easier to understand, the invention is further explained by combining the drawings and the detailed implementation mode:

as shown in fig. 1 to 3, the present embodiment provides a rotary valve plate type automatic control device for medical liquids, which comprises a housing 1 and a plurality of telescopic valves installed in the housing 1. The housing 1 comprises a matching cavity for mounting the turntable, the cavity wall of the matching cavity comprises a first matching side wall 102 and a second matching side wall 101 which are connected with each other, and the surface of the first matching side wall 102 is a section of smooth cylindrical surface.

The telescopic valve of this embodiment is its corresponding flow control element, which comprises at least two, and a specific number, for example 2, 3 or 5, is provided depending on the situation. Each telescopic valve comprises a pair of rotary discs and a valve rod 5, the rotary discs of the embodiment are of a circular plate-shaped structure and are concentrically arranged, and the front rotary disc and the rear rotary disc are front and rear, particularly, the rear rotary disc 202 is fixedly connected to the rotary shaft 3, the front rotary disc 201 rotates relative to the rear rotary disc 202 to serve as a circular rotary valve plate, the circle center of the rear rotary disc 202 is located at the circle center of the first matching side wall 102, so that one section of cylindrical side surface of the rear rotary disc 202 is in smooth contact with the first matching side wall 102, a crescent-shaped gap is formed between the other cylindrical side surfaces of the rear rotary disc 202 and the second matching side wall 101, and two ends of the rotary shaft 3 of the rear rotary disc 202 are respectively and rotatably installed at the front end. Specifically, the rear turntable 202 is fixed on the rotating shaft 3, the front turntable 201 is rotatably sleeved on the rotating shaft 3, the end face of the rear turntable 202, which faces the front turntable 201, is provided with the storage groove 149 and the TT-shaped sliding groove 17 which are parallel to each other, and the circle centers of the arc structures of the storage groove 149 and the TT-shaped sliding groove 17 coincide with the rotating centers of the two turntables. Meanwhile, the bottom of the storage groove 149 is also provided with a plurality of injection ports 13, the injection ports 13 are communicated with an external input pipe 11, and the end surfaces between the two rotary tables can be mutually sealed and attached, so that the sealing of the seams of the two end surfaces is realized. The front rotary table 201 is adjustably and fixedly mounted on the end face of the rear rotary table 202 through the matching of the corresponding TT-shaped bolt 16 and the TT-shaped sliding groove 17, so that the two rotary tables are connected into a whole to form a telescopic valve capable of moving integrally (the dotted line rectangular frame in fig. 1 is respectively a telescopic valve formed by the other two rotary tables, and only the front rotary table 201 of one telescopic valve is cut away for simplifying representation), and the whole telescopic valve can rotate integrally along with the rotating shaft 3. A bar-shaped valve hole with a blind hole structure is formed in the front rotary disc 201, the bar-shaped valve hole is intersected with a through hole 8 which penetrates through two end faces of the front rotary disc 201 and is always communicated with the storage groove 149, one end of the elastic piece 7 is installed at the hole bottom of the valve hole, the other end of the elastic piece 7 is connected with one end of the valve rod 5, the other end of the valve rod 5 penetrates through the valve hole in a sliding fit mode and extends out of the front rotary disc 201, and the valve rod 5 and the valve hole are matched to only allow the valve rod 5 to axially slide but not rotate, for example, the structure shown in fig: a guide edge 4 is fixedly connected to the surface of the valve rod 5 along the length direction, and the guide edge 4 is in sliding fit with a guide sliding groove on the inner wall of the valve hole. The other end of the valve rod 5 is always kept in contact with the cavity wall of the matching cavity of the shell 1 under the pushing action of the elastic piece 7. Meanwhile, the valve rod 5 is also provided with a drainage hole 6 penetrating through the valve rod 5, the drainage hole 6 is connected with an external discharge pipe so as to lead out the liquid medicine to a corresponding target part, specifically, the drainage hole 6 is aligned with the connection on the wall of the mounting cavity of the front turntable 201, and the discharge pipe is connected on the connection.

When pivot 3 rotates, the valve rod 5 of every expansion valve can be with the cooperation chamber wall extrusion contact in proper order of casing 1 to when making the carousel rotate, all valve rods 5 the other end in proper order with first cooperation lateral wall 102 smooth contact makes valve rod 5 retract towards the valve opening in, and when valve rod 5 retracted towards the valve opening drainage hole 6 with perforation 8 on the valve opening just to the intercommunication, and the other end of valve rod 5 enters into can make perforation 8 and drainage hole 6 stagger completely when crescent form space, in order to realize the thorough of expansion valve and close. All the telescopic valves are coaxially and serially arranged, all the telescopic valves are not positioned in the same plane and are linearly stacked and distributed, so that more telescopic valves can be designed to correspond to more target containers for inputting liquid medicines, and if all the telescopic valves are positioned in the same plane and are in a circular array design, the number of the telescopic valves is limited, and the telescopic valves can only be suitable for the conditions that the target containers are few and the structure requirement is compact and the occupied area is small.

When the rotary valve plate type nursing liquid medicine automatic control equipment is used, the rotary valve plate type nursing liquid medicine automatic control equipment is firstly connected to a pipeline between a liquid medicine storage 12 and a medicine supply target, the other ends of the valve rods 5 of all the telescopic valves are not contacted with the first matching side wall 102 initially, and whether certain opening is kept when the other ends of the valve rods 5 are contacted with the second side matching side wall or not is designed according to the adaptability of actual requirements, for example, certain overlapping amount of the through holes 8 and the drainage holes 6 can be kept in certain areas of the crescent-shaped holes at the end parts of the valve rods 5, namely, certain conduction connection is realized, when the valve rods 5 are gradually retreated into the valve holes in the rotating process of a rotary disc, the through holes 8 are gradually aligned with the drainage holes 6 and are completely communicated, the full opening of rated flow is realized, and the full opening state that the through holes are gradually aligned with the drainage holes 6 can also be realized by utilizing the sudden change of the interface at the intersection, when the valve rod 5 is in the crescent-shaped pore, the through hole 8 and the drainage hole 6 have no overlapping amount and are not communicated with each other completely; it should be noted that the storage slot 149 is arc-shaped and concentric with the turntable, so that when the storage slot 149 rotates within the arc-shaped path of the front turntable 201, the through hole 8 is always communicated with the storage slot 149, that is, the through hole 8 is always communicated with the liquid medicine source. The working states can be designed according to requirements. The setting sequence of the telescopic valves represents the communication sequence of the corresponding pipelines, while the first matching side wall 102 determines a rated full opening time of all the telescopic valves, so that the opening sequence and the conduction time of the telescopic valves are effectively and automatically controlled, and the setting sequence is simple, reliable and very practical. When the interval between two telescopic valves (the size of the included angle between the two valve rods 5) needs to be adjusted, the TT-shaped bolt 16 of the front rotary disc 201 of the telescopic valve is unscrewed to be separated from the rear rotary disc 202, then the telescopic valve rotates relative to the rear rotary disc 202 to rotate to a corresponding position, and the TT-shaped bolt 16 is screwed again to fix the front rotary disc 201. In fact, in the manufacturing process, the position of the valve hole is a precise part, is a wearing part relatively speaking, and is also a part with more daily maintenance, so that the valve hole can be designed and manufactured independently and is installed with the front rotary disc 201 in an embedded mode.

As an implementation detail, in the above embodiment, the hole axis of the valve hole is arranged along the radial direction of the rotary disk so that the valve rod 5 slidingly protrudes toward the outside. And the perforation 8 in the valve hole sets up the position and must make valve rod 5 when stretching out the longest distance, and perforation 8 still is stopped up by valve rod 5, avoids perforation 8 and the valve hole part intercommunication that elastic component 7 is located, protects elastic component 7. And the end face of the other end of the valve rod 5 is hemispherical so as to be smoothly and reliably contacted with the corresponding matched side wall, thereby improving the flexibility in rotation.

In addition, the elastic element 7 is a cylindrical spring or a conical spring, and when the elastic element is a conical spring, the large end of the conical spring is connected to the bottom of the valve hole. The diameter of the perforation 8 is smaller than that of the drainage hole 6 to sufficiently introduce the liquid medicine. And drainage hole 6 runs through the setting along the diameter direction of valve rod 5 to minimize valve rod 5's diameter, retrench structure.

Aiming at the embodiment, the extension and retraction of the valve rod 5 are different in the cavity wall of the matching cavity of the shell contacted by the rotating disc caused by the rotation of the rotating disc, and during actual manufacturing, the rotating disc can be fixed to enable the shell to rotate, so that the contact position of the valve rod 5 and the cavity wall of the matching cavity is changed. Referring to fig. 7-9, the details are as follows: a special control mechanism may be designed for controlling the opening and closing of the expansion valve as a flow switch actuator. Wherein, control mechanism includes base 21 and preceding support 19, back support 20, actuating lever 22, and base 21 level sets up, and preceding support 19 is a straight-bar, and back support 20 is a hook-shaped member that the top is crooked forward, preceding support 19 and the bottom of back support 20 articulate on base 21, and the top of back support 20 articulates the middle part of actuating lever 22. Simultaneously, the corner point of preceding support 19 articulates at the front end of actuating lever 22 and the free end rigid coupling of hook portion department of preceding support 19 has a steel ball 23, the rear end of actuating lever 22 is the straight shank form hand (hold) that the level set up, install in the contained angle region between the front side of preceding support 19 and base 21 and be ﹀ type reset reed, the contained angle under this reset reed natural state is the obtuse angle, reset reed both ends department respectively has a bellying, two bellyings respectively towards corresponding preceding support 19 and base 21 surface protrusion setting, and with preceding support 19 complex bellying and preceding support 19 sliding fit, with base 21 complex arch and base 21 rigid coupling to protruding can self-adaptively slide in the spout on preceding support 19 when preceding support 19 rotates forward and extrudees rather than the complex arch. In addition, a limiting rod 25 is further fixed to the base 21 at the front side of the rear support 20, and the limiting rod 25 is used for limiting a limit position of the rear support 20 in forward rotation. Preferably, in the above embodiment, the cross section of the protrusion portion on the side close to the front support 19 is T-shaped, and the sliding groove on the front support 19, which is engaged with the protrusion portion, is also T-shaped. In addition, as a specific implementation detail, a diagonal spring (not shown) is further provided between the front side of the rear support 20 and the base 21, and the diagonal spring is used for limiting the rear support 20 to return to the initial position when the driving rod 22 is not pressed by an external force.

On the other hand, in the embodiment, the outer surface of the housing 1 is fixedly sleeved with the outer gear ring 26, a rack 27 is vertically arranged between the control mechanism and the outer gear ring 26, the rack 27 can slide in the vertical direction and is always meshed with the outer gear ring 26, a plurality of bearing plates 28 are arranged at intervals along the length direction on the surface of one side of the rack 27 facing the control mechanism, and when the steel ball 23 of the front support 19 of the control mechanism downwards presses the bearing plates 28, the rack 27 drives the housing 1 to rotate so as to change the expansion amount of the valve rod 5 of the invention.

When the valve rod adjusting device is used, the handle of the driving rod 22 is pressed downwards by hands or feet to drive the front support 19 to rotate forwards, so that the steel ball 23 of the hook part of the front support collides with the bearing plate 28 on the rack 27, the rack 27 is pushed to vertically move downwards to drive the outer gear ring 26 to rotate, the shell rotates, the expansion amount of the valve rod 5 is changed by the rotation of the shell, and the purpose of adjusting the expansion amount of the valve rod 5 to adjust the flow is achieved, and the valve rod adjusting device is particularly useful for temporary adjustment in an accidental situation.

In the specific implementation of the present invention, in order to ensure that the input pipe 11 is prevented from being wound and to protect the stability and reliability of the input pipe 11 and the connection thereof when the turntable rotates, especially when the turntable rotates for multiple revolutions during actual operation, as shown in fig. 4, the input pipe 11 may be made to include an input pipe section 1101 and an output pipe section 1102, wherein the input pipe 11 is connected to the injection port 13, the output pipe section 1102 is connected to the liquid storage 12, and the axis of the output pipe section 1102 is coaxial with the axis of the turntable, i.e., coaxial with the rotation shaft 3. This configuration may also be used for the discharge pipes to avoid the corresponding pipes from becoming entangled during rotation. The anti-winding structure ensures that the input tube 11 can not be wound and bound by itself when the turntable rotates, has very reliable connection, ensures the stable supply input or output of liquid medicine, is particularly important for improving the service performance of the anti-winding rotary table, and can greatly improve the convenience and the reliability of use.

In addition, as for the structure of the valve rod 5, the following structure can be adopted to replace the structure: the valve rod 5 is not provided with the drainage hole 6, but as shown in fig. 5, the rod section of the valve rod 5, which is originally provided with the drainage hole 6, is processed into a reduced rod neck part, that is, the valve rod 5 comprises two sections of sliding shafts with equal thickness and a section of connecting rod 10 smaller than the sliding shafts, and the connecting rod 10 is coaxially connected between the two sliding shafts to realize the integral fixed connection of the two sliding shafts. The structure ensures that the valve rod 5 is not limited to the design requirement that the valve rod 5 and the valve hole only allow relative axial sliding but cannot rotate, the valve rod 5 can freely rotate, the valve rod 5 is more beneficial to free telescopic movement of the valve rod 5, and the sensitivity and the reliability of telescopic valve control are improved.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.