CN112495207A

CN112495207A - Hemodialysis liquid preparation device

Info

Publication number: CN112495207A
Application number: CN202011357267.8A
Authority: CN
Inventors: 陈晓玲
Original assignee: Taizhou Huangyan Yushan Comprehensive Clinic
Current assignee: Ningbo Tianyi Medical Equipment Co ltd
Priority date: 2018-11-23
Filing date: 2018-11-23
Publication date: 2021-03-16
Anticipated expiration: 2038-11-23
Also published as: CN109529142B; CN109529142A; CN112495207B

Abstract

The invention discloses a preparation device of hemodialysis liquid, wherein a dry powder bag comprises a bag body; the discharge joint is arranged on the bag body and comprises an expanding head fixedly connected with the bag body, a material guide pipe connected with the expanding head, a deformation section formed on the material guide pipe and a stopping ring arranged on the deformation section; the preparation device comprises a case, wherein a dry powder conveying device is arranged at the upper part of the case and used for releasing materials in a dry powder bag outwards; the liquid preparation device is internally provided with liquid for containing dry powder and is used for mixing the dry powder with the liquid in the liquid preparation device under a sealed environment to prepare dialysate; and the quantitative discharging device is used for controlling the discharging amount of the dry powder and slowing down the discharging speed of the dry powder. The dry powder bag is placed in the powder cavity, so that the dry powder bag can be communicated with the discharge pipe, and the operation is simple and convenient; the powder cavity does not need to be supplemented frequently, the working efficiency is high, and the possibility of pollution of the dialysate is further reduced.

Description

Hemodialysis liquid preparation device

Technical Field

The invention belongs to the technical field of nephrology department, and particularly relates to a hemodialysis liquid preparation device.

Background

Hemodialysis, which utilizes the principle of semipermeable membrane to remove various harmful and redundant metabolic wastes and excessive electrolytes in vivo out of the body by diffusion, achieves the purposes of purifying blood and correcting water electrolytes and acid-base balance, and is one of the kidney replacement treatment modes for treating patients with acute and chronic renal failure in internal medicine. In hemodialysis, dialysate is required to exchange substances with human blood, so that the human blood is purified.

Chinese patent CN104120882B discloses a stirring device for preparing dialysate, which comprises a stirrer, a barrel body and a barrel cover, wherein the stirrer penetrates through the barrel cover to enter the barrel body, the bottom of the barrel body is arc-shaped, and the stirrer is provided with blades; when dry powder is added, the dry powder needs to be scooped into the stirring chamber manually to control the concentration of the dialysate, the operation is complicated, and the control accuracy is low. Secondly, the operation of manual scooping is time-consuming and labor-consuming, and the work efficiency is low.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the hemodialysis liquid preparation device which can automatically feed materials, accurately control the feeding amount and has high working efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme: a hemodialysis liquid preparation device, the dry powder bag comprises

A bag body;

the discharge joint is arranged on the bag body and comprises an expanding head fixedly connected with the bag body, a material guide pipe connected with the expanding head, a deformation section formed on the material guide pipe and a stopping ring arranged on the deformation section;

the preparation device comprises

The upper part of the case is provided with a dry powder conveying device which is used for releasing materials in the dry powder bag outwards; the dry powder conveying device comprises a powder cavity arranged on the case, a fixing part for fixing a dry powder bag and a discharge pipe matched with the dry powder bag;

the liquid preparation device is internally provided with liquid for containing dry powder and is used for mixing the dry powder with the liquid in the liquid preparation device under a sealed environment to prepare dialysate;

and the quantitative discharging device is used for controlling the discharging amount of the dry powder and slowing down the discharging speed of the dry powder.

The liquid preparation device prepares the dialysate in a sealed environment, thereby effectively avoiding that external impurities cannot enter the dialysate and are not easily polluted in the preparation process; the discharging connector is arranged on the dry powder bag, so that when the dry powder bag is placed in the powder cavity, the upper part of the discharging pipe can be directly inserted into the discharging connector, the discharging connector is opened, and the materials in the dry powder bag can be directly conveyed to the liquid preparation device through the discharging pipe; after one bag is used, a new bag is replenished inwards, the powder cavity does not need to be supplemented frequently, the working efficiency is high, and the possibility of pollution of dialysate is further reduced; the stopping ring can close the discharging joint in the selling process after the dry powder bag is normally conveyed, so that the condition of material leakage is avoided; the deformation section is arranged, so that the occurrence of material leakage is further reduced, and meanwhile, the deformation section can be pushed open when the material guide pipe is inserted into the material discharge pipe, so that the pipe diameter of the material guide pipe is ensured to be pushed open to a proper state, and the condition that dry powder is blocked due to the fact that the pipe diameter is too small is avoided;

secondly, due to the arrangement of the dry powder conveying device and the quantitative discharging device, the automatic discharging of the dry powder can be realized, the dry powder does not need to be scooped manually, the operation is simple and convenient, and the working efficiency is high; and quantitative unloader can effectively control the unloading degree of dry powder to realize the accurate control to dry powder unloading volume, guarantee that the condition of an illness that prepares the dialysate concentration that obtains can be better to each patient, reach more good dialysis effect.

Preferably, the material guide pipe is made of plastic, and the deformation section is directly formed on the material guide pipe through injection molding; the minimum inner diameter of the deformation section is 0; the stop ring is sleeved on the position with the minimum inner diameter of the deformation section; the processing and forming are simple, and the processing efficiency is high; the minimum inner diameter of the deformation section is 0, so that the situation of powder leakage of the dry powder bag in a normal state can be ensured; and the stop ring is combined at the position, so that a better material leakage prevention effect can be realized.

Furthermore, the stop ring is made of plastic, and a breaking notch is formed in the stop ring; the breaking notch can be a broken line similar to a bottle cap or a line at the upper opening of the pop can, which is cut by a machine, so that the stopping ring can be broken under the action of external force.

Preferably, the upper part of the discharge pipe can penetrate out of the material guide pipe, and a plurality of V-shaped open grooves are uniformly arranged on the side wall of the upper part of the discharge pipe at intervals along the circumferential direction; through the setting of V type open slot for the upper end of discharging pipe can send the deformation of part degree, and then at the in-process that inserts the deformation section, the bore on discharging pipe upper portion can reduce, and then inserts more easily to the deformation section in, backs up the deformation section.

Furthermore, the quantitative blanking device comprises a material baffle which can move back and forth and is arranged on the discharge pipe in a penetrating way, a driving part for driving the material baffle to move and a knob part; when the screwing piece rotates towards the clockwise direction, the striker plate is not driven by the driving part; when the screwing piece rotates towards the anticlockwise direction, the material baffle plate is driven by the driving part to move back and forth so as to realize the discharge of materials; when the knob is rotated clockwise, the striker plate cannot move; the baffle plate can move only when the knob piece rotates anticlockwise, so that the discharge pipe is opened, and the amount of dry powder added into the preparation chamber from the dry powder bag can be intuitively reflected by rotating the number of turns of the knob piece when the dialysate is prepared, so that the effects of accurate discharging amount and accurate concentration of the prepared dialysate are further achieved; moreover, the knob piece can be controlled to automatically reset when rotating anticlockwise, and then the automatic blanking, quantity control and preparation can be realized only by rotating the knob piece to a specified position, so that the operation is simple, and the working efficiency is high.

Furthermore, the driving part comprises an elastic component connected with the striker plate, a driving part connected with the elastic component, an extending part arranged on the knob piece and matched with the driving part, a one-way rotation stopping structure used for realizing one-way rotation stopping matching between the extending part and the driving part, and a reset component acting on the extending part; the one-way rotation stopping structure can realize that the knob piece drives the striker plate in only one rotation direction, has simple structure and convenient realization, has low matching failure rate, and is not easy to generate the situation of slippage between the knob piece and the driving part when the knob piece rotates anticlockwise due to unstable matching; secondly, the arrangement of the reset component ensures that the reset component can store energy after the knob piece rotates clockwise, thereby effectively avoiding the situation that the knob piece cannot be reset; the deformation that elastic component took place can drive the striker plate and take place the position and remove, and realize the reciprocating operation of striker plate, guarantees the normal reset of striker plate.

Preferably, the driving part is a circular disc body, the extending part is a T-shaped column, and the unidirectional rotation stopping structure comprises a groove which is arranged on the circular disc body and matched with the T-shaped column, a circle of ratchets which are arranged on the inner wall of the groove and a circle of rotation stopping ratchets which are arranged on the outer surface of the T-shaped column; carry on spacingly through the recess to T type post, the one-way cooperation of splining of drive division and extension is realized to rethread ratchet and the cooperation between the ratchet of splining, and because the ratchet is the round setting with the ratchet of splining to stability is higher during the cooperation, even there are one of them two positions because slight wearing and tearing the condition of skidding appears, also can realize the good cooperation of splining between all the other ratchets, guarantees that the drive division can drive the extension rotation all the time in the direction of splining.

In summary, the invention has the following advantages: the discharge joint is arranged on the dry powder bag, so that the dry powder bag can be communicated with the discharge pipe when being placed in the powder cavity, and the operation is simple and convenient; after one bag is used, a new bag is replenished inwards, the powder cavity does not need to be supplemented frequently, the working efficiency is high, and the possibility of pollution of dialysate is further reduced; the arrangement of the stop ring and the deformation section reduces the possibility of material leakage of the dry powder bag.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a top view of the present invention.

Fig. 3 is a perspective sectional view taken along line C-C of fig. 2.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is a schematic structural view of the quantitative blanking device of the present invention.

Fig. 6 is a right side view of fig. 5.

Fig. 7 is a cross-sectional view taken along line B-B of fig. 6.

Fig. 8 is a partially exploded view of the first embodiment of the quantitative feeding device of the present invention.

Fig. 9 is a partially exploded view of the quantitative blanking device of the present invention.

Fig. 10 is a perspective sectional view taken along line a-a of fig. 2.

Figure 11 is an enlarged view at B in figure 10,

fig. 12 is an enlarged view at C in fig. 10.

Fig. 13 is an enlarged view at D in fig. 10.

Fig. 14 is a schematic structural view of a base in the present invention.

FIG. 15 is a schematic diagram of a dry powder delivery device according to the present invention.

FIG. 16 is a schematic diagram of a powder bag of the present invention not placed in the powder chamber.

FIG. 17 is a schematic illustration of the tapping pipe according to the invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

As shown in fig. 1-17, a hemodialysis solution preparing apparatus, wherein the preparing apparatus includes a case 1, a liquid preparing apparatus, a quantitative discharging apparatus and a dry powder bag, and a dry powder conveying apparatus for releasing the materials in the dry powder bag is arranged at the upper part of the case 1; the liquid preparation device is internally provided with liquid for containing dry powder and is used for mixing the dry powder with the liquid in the liquid preparation device under a sealed environment to prepare dialysate; the quantitative discharging device is used for controlling the discharging amount of the dry powder and slowing down the discharging speed of the dry powder; specifically, the material device comprises a material baffle plate 41 which can move back and forth and is arranged on the discharge pipe in a penetrating way, a driving part for driving the material baffle plate 41 to move and a knob part 42; the material blocking plate 41 is made of plastic, one end of the material blocking plate 41 is in an arc shape and penetrates through the discharge pipe, a clamping groove matched with the material blocking plate is formed in the inner wall of the discharge pipe, and a strip-shaped opening through which the discharge pipe penetrates is formed in the side wall of the discharge pipe; the knob piece is a common plastic knob purchased from the market, and the structure is not described in detail; when the knob member 42 is rotated towards the clockwise direction, the striker plate 41 is not driven by the driving member; when the knob member 42 rotates in the counterclockwise direction, the striker plate 41 is driven by the driving member to move back and forth, so as to discharge the material.

Specifically, the driving part comprises an elastic assembly, a driving part 43, an extending part 44, a one-way rotation stopping structure and a resetting assembly, the elastic assembly is connected with the striker plate 41, and the driving part 43 is connected with the elastic assembly; the elastic component comprises an arched elastic sheet 53, a first connecting column 54, a second connecting column 55 and a spring 56, wherein the arched elastic sheet 53 is made of stainless steel and has certain deformation capacity, the initial state is an arched state, and when the arched part is extruded by external force, the arched elastic sheet can deform; the first connecting column 54 is connected with one end of the arched elastic sheet, the second connecting column 55 is connected with the other end of the arched elastic sheet, and the first connecting column and the second connecting column are both made of stainless steel structures and are integrally formed with the stainless steel elastic sheet; the end of the striker plate 41 is provided with a cylindrical hollow extension sleeve 411, the extension sleeve 411 and the striker plate are manufactured by integral injection molding, the first connecting column 54 is rotatably arranged in the extension sleeve 411 in a penetrating manner, and an anti-falling convex portion 541 is arranged at one end of the first connecting column 54 penetrating into the extension sleeve to realize anti-falling fit with the extension sleeve, wherein the anti-falling convex portion is a ring of flange which is formed by protruding the first connecting column outwards; the second connecting column 55 is fixedly connected with the driving part; the spring 56 can be purchased directly from the market, and one end of the spring 56 is connected with one end of the arched elastic sheet 53, and the other end is connected with the other end of the arched elastic sheet 53; the case is provided with a cavity 11, the elastic assembly is arranged in the cavity 11, the elastic sheet is propped against the upper inner wall of the cavity in an initial state, the elastic sheet is in an extruded state and further in an extended state, a forward propping force is applied to the striker plate, and the discharge pipe is stopped and cannot be blanked in the initial state; in the process that the knob piece drives the arched elastic piece to rotate, the elastic piece is not extruded by the upper inner wall of the cavity any more, and can be restored to an arched state, so that the material baffle plate is pulled backwards, and the material discharging pipe is opened; of course, when the knob piece rotates for a circle, the elastic sheet returns to the extruded position again, and the process is repeated; furthermore, when the knob rotates for a plurality of circles, the intermittent blanking condition can be presented, so that the situation that too much dry powder enters for dissolving at one time can not occur, and the dissolving effect of the dry powder is improved; through the setting of spring, when guaranteeing that the shell fragment is extruded and extend, the spring also is stretched, and then guarantees that the shell fragment can be more easy and quick when the later stage resets, and the shell fragment is difficult for losing the ability of replying because of receiving the extrusion for a long time.

The driving part 43 is a circular disc body made of plastic or metal, the extending part 44 is arranged on the knob member, and the extending part 44 is a T-shaped column formed by directly extending outwards from the knob member; the unidirectional rotation stopping structure is used for realizing unidirectional rotation stopping matching between the extension part and the driving part, and specifically comprises a disc-shaped groove 45 arranged on the disc body, a circle of ratchets 46 uniformly arranged on the inner wall of the groove at intervals along the circumferential direction, and a circle of rotation stopping ratchets 47 uniformly arranged on the outer surface of the T-shaped column at intervals along the circumferential direction, wherein the T-shaped column can be inserted into the groove 45, the circle of ratchets and the circle of rotation stopping ratchets are mutually clamped, and when the knob piece rotates clockwise, the ratchets and the rotation stopping ratchets mutually slip and cannot drive the driving part to rotate; when the knob piece rotates anticlockwise, the ratchets and the rotation stopping ratchets stop rotating, and the driving part can be driven to rotate; because the ratchet is the round setting with the ratchet of splining to stability is higher during the cooperation, even there is one of them two positions because slight wearing and tearing and the condition of skidding appears, also can realize good splining cooperation between the other ratchets, guarantees that drive division can drive the extension portion and rotate all the time in the direction of splining.

The reset assembly acts on the extension part, the reset assembly comprises a positioning sleeve 51 and an energy storage part 52, the positioning sleeve 51 can be made of metal or plastic and fixedly embedded on the case, and the extension part can penetrate through the positioning sleeve to penetrate into the cavity; the energy storage piece 52 is arranged between the positioning sleeve and the extension part, and is specifically a clockwork spring made of stainless steel, one end of the energy storage piece 52 is fixedly connected with the extension part 44, and the other end is fixedly connected with the positioning sleeve 51; when the knob member idles, the energy storage member 52 can store power potential energy, and then after the knob member rotates to the right position, the energy storage member can act the stored potential energy on the knob member, so as to drive the knob member to reset; compared with a structure that the spring, the elastic sheet and the like are reset, the number of turns that the knob piece can rotate is more, the range of the feeding amount control is wider, the deformation of the energy storage piece can be stronger, and the service life is long.

The liquid preparation device comprises an accommodating cavity 61, a preparation chamber 62 and a swinging component, wherein the accommodating cavity 61 is arranged at the lower part of the case, the preparation chamber is made of stainless steel, and the preparation chamber is arranged in the accommodating cavity and matched with the preparation chamber; the swinging part comprises a base 63, a universal joint 64, an elastic support part 65 and a driving motor 66, wherein the base 63 is made of stainless steel, the preparation chamber is detachably connected with the base, the universal joint 64 is a conventional universal joint on the market, one end of the universal joint 64 is connected with the base, and the other end of the universal joint 64 is connected with the driving motor 66; the driving motor 66 is embedded in the bottom wall of the accommodating cavity 61, so that the position of the driving motor is fixed; the elastic supporting piece 65 is a common spring purchased from the market, has a large elastic coefficient, and can support the preparation chamber; the elastic supporting piece 65 is sleeved outside the universal joint 64, one end of the elastic supporting piece 65 is fixedly connected with the base, and the other end of the elastic supporting piece 65 is fixedly connected with the accommodating cavity 61; preferably, the bottom of the accommodating cavity is arranged in a circular truncated cone-shaped structure, so that enough space is provided for rotation and direction inclination of the universal joint; under the structure, the inclination direction of the preparation chamber can be inclined in a direction of 360 degrees relative to the output shaft of the motor, and further when the motor drives the preparation chamber to rotate, the preparation chamber can be inclined under the action of centrifugal force, so that the overall motion track of the preparation chamber is in a circular truncated cone shape with a small lower part and a large upper part; the arrangement of the spring effectively plays a role in supporting the preparation chamber, so that the preparation chamber can be stabilized in a vertical state when the motor does not drive the preparation chamber to rotate; and the arrangement of the spring can also ensure that the preparation chamber floats up and down in the rotation process, thereby further enhancing the turbulent state of the liquid and basically avoiding the residue when the dry powder is dissolved.

Preferably, the base 63 includes a seat body 631 and a threaded sleeve 632, the seat body 631 has a slot for inserting the bottom of the preparation chamber, and the slot is matched with the bottom of the preparation chamber; the threaded sleeve 632 is rotatably arranged on the seat body, a convex part with a T-shaped cross section is arranged at the lower part of the threaded sleeve, and a ring groove with a T-shaped cross section for the convex part to insert is arranged on the seat body, so that the threaded sleeve and the seat body cannot be separated from each other; the side wall of the preparation chamber 62 is provided with an external thread which can be in threaded connection with the threaded sleeve 632; the preparation chamber 62 includes a tank 621 and an end cap 622, the end cap 622 is screwed on the tank to seal an opening at the upper part of the tank, and the end cap 622 is provided with a feeding part 623 through which dry powder can enter the tank.

Specifically, the dry powder conveying device comprises a powder cavity 2, a fixing part and a discharge pipe 3, wherein the powder cavity 2 is arranged at the upper part of the case, and the fixing part is positioned in the powder cavity and used for fixing a dry powder bag; the dry powder bag comprises a bag body 81 and a discharge connector arranged on the bag body 81, and the bag body is a common packaging bag on the market and is not described again; the discharge connector comprises an expanding head 82, a material guide pipe 83, a deformation section 84 and a stop ring 85, wherein the expanding head 82 is fixedly connected with a bag body and is directly and fixedly connected with a belt body in a hot melting way during packaging, the material guide pipe 83 is connected with the lower part of the expanding head, and when the dry powder bag 81 is placed in a powder cavity, the material guide pipe 83 is communicated with the discharge pipe 3; the deformation section 84 is formed on the material guide pipe, the material guide pipe 83 is made of plastic, and the deformation section 84 is directly formed on the material guide pipe 83 through injection molding; the minimum inner diameter of the deformation section 84 is 0, and the stop ring 85 is sleeved on the position of the minimum inner diameter of the deformation section 84; preferably, the stopping ring 85 is made of plastic, and the stopping ring 85 is provided with a breaking notch, wherein the breaking notch can be a broken line cut by a machine and similar to a bottle cap or a line at the upper opening of a pop can, so that the stopping ring can be broken under the action of external force;

the discharging connector is arranged on the dry powder bag, when the dry powder bag is placed in the powder cavity, the upper part of the discharging pipe can be directly inserted into the discharging connector, the discharging connector is unfolded, and materials in the dry powder bag can be directly conveyed to the liquid preparation device through the discharging pipe; after one bag is used, a new bag is replenished inwards, the powder cavity does not need to be supplemented frequently, the working efficiency is high, and the possibility of pollution of dialysate is further reduced; the stopping ring can close the discharging joint in the selling process after the dry powder bag is normally conveyed, so that the condition of material leakage is avoided; and the deformation section's setting has further reduced the emergence of leaking the material condition, and the deformation section can be backed off when passage and discharging pipe are pegged graft simultaneously, guarantees that the pipe diameter of passage is strutted to suitable state, avoids appearing the condition that the dry powder blockked up because the pipe diameter undersize.

The discharge pipe 3 comprises a material receiving head 31, a connector 32 connected with a feeding part on the end cover and a conveying pipe 33 used for connecting the material receiving head and the connector, wherein the conveying pipe 33 is made of plastics and has a corrugated pipe structure, and can deform when the preparation chamber swings; the upper part of the discharge pipe 3 can penetrate out of the material guide pipe, specifically, the material receiving head 31 penetrates into the discharge pipe, and a horn-shaped material receiving cover is arranged on the material receiving head, so that powder is effectively prevented from leaking from a gap between the material receiving head and the discharge pipe; the upper portion lateral wall of this material receiving head 31 is gone up along the even a plurality of V type open slots 31 that are equipped with of circumferencial direction interval, guarantees that the upper end of discharging pipe can send the deformation of part degree, and then at the in-process that inserts the deformation section, and the bore on discharging pipe upper portion can reduce, and then inserts more easily to the deformation section in, backs down the deformation section.

The fixing part comprises a cover plate 71, two fixing plates 72, a clamp 73 and a lifting handle 74, and the cover plate 71 covers the powder cavity and can close the powder cavity; the two fixing plates 72 are respectively arranged at the left side and the right side of the cover plate, two clamps are respectively arranged on the two cover plates, and the distance between the two cover plates is the length of the dry powder bag, so that the dry powder bag can be fixed by the clamps on the two fixing plates; the handle 74 is disposed on the cover plate, and the cover plate can be lifted upwards through the handle to bring the dry powder bag out of the powder cavity.

When the dialysate needs to be prepared, the cover plate is lifted upwards, the dry powder bag is fixed by the clamp, the stop ring is pulled apart, then the cover plate is moved downwards, the material receiving head is inserted into the discharging joint, and the deformation section is jacked open; in an initial state, the material baffle is in a state of closing the discharge pipe, then medical staff judges the required dry powder amount according to the concentration of the dialysate prepared as required, a rotary button piece is correspondingly rotated, corresponding turns are rotated (if the feeding amount of one turn is 10ml, and if 30ml is required, 3 turns are rotated), after the rotary button piece is in place, a driving motor is started, the preparation chamber swings, the rotary button piece reversely rotates under the action of a reset part, an arched elastic piece is driven to rotate, the material baffle is enabled to move back and forth, the discharge pipe is opened, and the feeding is controlled; the dry powder falls into the dispensing chamber and dissolves in the liquid in the dispensing chamber during rotation of the dispensing chamber.

Claims

1. A hemodialysis liquid preparation device is characterized in that: the dry powder bag comprises

A bag body (81);

the discharging connector is arranged on the bag body (81), and comprises an expanding head (82) fixedly connected with the bag body, a material guide pipe (83) connected with the expanding head, a deformation section (84) formed on the material guide pipe and a stopping ring (85) arranged on the deformation section;

the preparation device comprises

The upper part of the case (1) is provided with a dry powder conveying device which is used for releasing materials in the dry powder bag outwards; the dry powder conveying device comprises a powder cavity (2) arranged on the case, a fixing part for fixing a dry powder bag and a discharge pipe (3) matched with the dry powder bag; when the dry powder bag (81) is arranged in the powder cavity, the material guide pipe (83) is communicated with the material discharge pipe (3);

the quantitative discharging device is used for controlling the discharging amount of the dry powder and slowing down the discharging speed of the dry powder;

the material guide pipe (83) is made of plastic, and the deformation section (84) is directly formed on the material guide pipe (83) through injection molding; the minimum inner diameter of the deformation section (84) is 0; the stop ring (85) is sleeved on the position of the minimum inner diameter of the deformation section (84);

the stop ring (85) is made of plastic, and a breaking notch is arranged on the stop ring (85);

the upper part of the discharge pipe (3) can penetrate out of the material guide pipe, and a plurality of V-shaped open grooves (31) are uniformly arranged on the side wall of the upper part of the discharge pipe (3) at intervals along the circumferential direction;

the quantitative blanking device comprises a material baffle plate (41) which can move back and forth and is arranged on the discharge pipe in a penetrating way, a driving part for driving the material baffle plate (41) to move and a knob piece (42); when the knob piece (42) rotates towards the clockwise direction, the striker plate (41) is not driven by the driving part; when the knob piece (42) rotates towards the anticlockwise direction, the material baffle plate (41) is driven by the driving part to move back and forth so as to realize the discharge of materials;

the driving part comprises an elastic component connected with the striker plate (41), a driving part (43) connected with the elastic component, an extending part (44) arranged on the knob piece and matched with the driving part, a one-way rotation stopping structure used for realizing one-way rotation stopping matching between the extending part and the driving part, and a resetting component acting on the extending part;

the drive part (43) is a disc body, the extension part (44) is a T-shaped column, and the unidirectional rotation stopping structure comprises a groove (45) which is arranged on the disc body and matched with the T-shaped column, a circle of ratchets (46) which are arranged on the inner wall of the groove and a circle of rotation stopping ratchets (47) which are arranged on the outer surface of the T-shaped column.