CN215805090U

CN215805090U - Pump head and pump valve integrated structure comprising same

Info

Publication number: CN215805090U
Application number: CN202122328939.9U
Authority: CN
Inventors: 雍乾荣
Original assignee: Xiamen Pumtek Electronics Technology Co ltd
Current assignee: Xiamen Pumtek Electronics Technology Co ltd
Priority date: 2021-09-25
Filing date: 2021-09-25
Publication date: 2022-02-11
Anticipated expiration: 2031-09-25

Abstract

The utility model relates to a pump head and contain integrative structure of pump valve of this pump head, a pump head, it includes the upper cover, diaphragm seat and difunctional valve block, the upper cover is formed with output flow path and release flow path, the diaphragm seat is formed with inhales the flow path, discharge flow path and end and unload the flow path, difunctional valve block sets up between upper cover and diaphragm seat, difunctional valve block is provided with inhales one-way valve block, discharge check valve block and valve function piece, realized the integrative function of pump valve in upper cover, diaphragm seat and the diaphragm seat three layer construction, the flow path structure has been optimized, new flow path has been designed, can change the functional reliability of integrative structure of pump valve, difunctional valve block is closed when the fluid is gone into to the work bag intracavity pump, difunctional valve block is opened when losing air, realize such pump valve reliability, satisfy the required performance difunctional of product.

Description

Pump head and pump valve integrated structure comprising same

Technical Field

The application relates to the technical field of pump valves, in particular to a pump head and a pump valve integrated structure comprising the same.

Background

In fluid pump applications, one application requires pumping a fluid into a sealed working chamber to provide a certain internal pressure in the working chamber. And after the pressure in the working bag cavity reaches a preset target and completes corresponding actions, the pressure of the working bag cavity needs to be relieved. For example, in a common scenario of a sphygmomanometer, a cuff needs to be inflated first, and after the cuff is inflated to reach a certain air pressure, the sphygmomanometer measures blood pressure through the cuff. After the blood pressure measurement is completed, the pressure relief treatment needs to be carried out on the cuff.

In the related art, in order to ensure that the fluid pump has an automatic pressure relief function, a pressure relief valve is often integrated on the fluid pump. The patents and the current products are as follows: three things are done simultaneously on one flow path: pumping fluid into the closed space, pumping the fluid into the valve forward to block the pressure relief opening, and pumping the fluid into the valve backward to open the pressure relief opening after the pump is powered off; however, because the fluid is in the same channel, the fluid can flow to the valve in the forward direction, and the reverse deflation of the valve can be influenced to open the pressure relief opening; the valve is completely closed and opened depending on the pressure difference of the fluid acting on the channel in the forward and reverse directions, but the pressure difference is formed on a flow path, so that the stability is difficult; the dual functions of the pump and the valve are that the valve is closed when fluid is pumped, otherwise, stable fluid cannot be pumped when the fluid is pumped; the dual functions of the pump and valve require that the valve be opened when air is released, otherwise it is impossible to release stable fluid when air is released.

However, in this simple integration manner, since the flow channels of the pump-valve integrated dual-function fluid pump are correlated, the valve is closed when the pump is in operation, and the valve is opened when the pump is in pressure relief, and especially, the reliability is not easy to be realized, so the reliability of the performance of the pump-valve integrated dual-function fluid pump is a current major technical problem.

SUMMERY OF THE UTILITY MODEL

In order to improve the performance reliability of the pump valve integrated dual-function fluid pump, the application provides a pump head and a pump valve integrated structure comprising the same.

The application provides a pair of pump head and contain integrative structure of pump valve of this pump head adopts following technical scheme:

in a first aspect, the present application provides a pump head, which adopts the following technical scheme:

a pump head, comprising:

the upper cover is provided with an output flow path used for communicating the working bag cavity and a pressure relief flow path selectively communicated with the output flow path;

the diaphragm seat is provided with a suction flow path, a discharge flow path and a stop flow path, and the suction flow path, the discharge flow path and the output flow path are communicated along a working direction in a one-way mode;

the dual-function valve plate is arranged between the upper cover and the membrane seat and is provided with a suction one-way valve plate, a discharge check valve plate and a valve function plate; the suction check valve plate enables the suction flow path and the discharge flow path to be communicated in a single direction along the working direction, the suction flow path faces the unloading stopping flow path in the unloading stopping direction, and the suction check valve plate enables the suction flow path and the unloading stopping flow path to be communicated in a single direction along the unloading stopping direction; the discharge check valve plate enables the discharge flow path and the output flow path to be communicated in a single direction along the working direction; the valve function piece selectively communicates the output flow path with the pressure relief flow path.

By adopting the technical scheme, two flow paths of the fluid in the pump head are provided, the first path is that the fluid enters the working bag cavity through the suction flow path, the discharge flow path and the output flow path, wherein the suction one-way valve plate enables the suction flow path to be communicated with the discharge flow path in a one-way mode along the working direction, and the working direction refers to: the fluid is transported to the working bag cavity along the suction flow path, the discharge flow path and the output flow path in a single direction; the second path is that the fluid enters the unloading stopping flow path from the suction flow path along the unloading stopping direction, and the pressure in the working air sac chamber is gradually increased when the fluid is continuously conveyed to the working air sac chamber. In order to achieve the predetermined target pressure in the working bladder chamber, the pressure at which the pump head delivers fluid to the working bladder chamber is increased, resulting in a gradual increase in the pressure in the dump flow path. The valve function piece selectively communicates the output flow path with the pressure relief flow path, the selective communication being: when the pressure of the fluid conveyed to the working bag cavity by the pump head is higher than the pressure of the fluid in the working bag cavity, the valve function sheet separates the output flow path from the pressure relief flow path; when the pressure of the fluid conveyed to the working bag cavity by the pump head is lower than the pressure of the fluid in the working bag cavity, the output flow path is communicated with the pressure relief flow path by the valve function sheet, so that the pressure relief action is completed. Compared with a simple integrated pressure relief valve on a fluid pump, the integrated function of the pump and the valve is realized in the three-layer structure of the upper cover, the diaphragm seat and the diaphragm seat, the flow path structure is optimized, a new flow path is designed, the performance reliability of the integrated structure of the pump and the valve can be changed, the dual-function valve plate is closed when fluid is pumped into the working bag cavity, and the dual-function valve plate is opened when air is leaked, so that the dual-function reliability of the pump and the valve is realized, and the required performance of a product is met.

Optionally, the upper cover is provided with an output nozzle for inputting fluid into the working bag cavity and a pressure relief nozzle for discharging fluid from the working bag cavity, the output flow path is formed on the output nozzle, and the pressure relief flow path is formed on the pressure relief nozzle; when fluid flows along the working direction, the valve function piece is abutted against the pressure relief nozzle and blocks the output flow path from the pressure relief flow path; when the pump head stops conveying fluid, the fluid flows to the discharge check valve plate from the output flow path, the discharge check valve plate blocks the discharge flow path from the output flow path, the valve function plate is separated from the pressure relief nozzle, and the output flow path is communicated with the pressure relief flow path.

By adopting the technical scheme, in the process that the fluid is conveyed to the working bag cavity along the suction flow path, the discharge flow path and the output flow path in a one-way mode, when the fluid flows along the working direction, the pressure of the fluid conveyed to the working bag cavity by the pump head is greater than the pressure of the fluid in the working bag cavity, so that the valve function piece is abutted against the pressure relief nozzle, and the output flow path and the pressure relief flow path are isolated by the valve function piece; when the pump head stops conveying fluid, the pressure of the fluid conveyed to the working bag cavity by the pump head is smaller than the pressure of the fluid in the working bag cavity, the fluid flows to the discharge check valve plate from the output flow path, the discharge check valve plate blocks the discharge flow path, and the fluid in the output flow path changes the valve function plate from a state of being tightly abutted against the pressure relief nozzle into a state of separating the valve function plate from the pressure relief nozzle, so that the valve function plate communicates the output flow path with the pressure relief flow path, and the integrated function of the pump valve is realized.

Optionally, the unloading stopping flow path comprises an unloading stopping channel formed on the diaphragm seat, the unloading stopping channel faces towards one side where the dual-function valve plate is located, a valve function cavity is arranged on one side where the dual-function valve plate is located, the valve function plate faces towards the opening end face on one side where the dual-function valve plate is located, the valve function plate is elastic, and pressure of fluid in the valve function cavity controls the valve function plate and the pressure relief nozzle to be tightly pressed or separated.

Through adopting above-mentioned technical scheme, only unload the passageway and be provided with the valve function chamber towards one side at difunctional valve block place, the valve function piece is sealed the opening end face of valve function chamber towards difunctional valve block place one side, compare in the volume of only unloading the passageway, the valve function chamber can increase and the space between the valve function piece, so that there is more fluid can be full of the valve function chamber, thereby the fluid has more abundant active area to the valve function piece, guarantee that opening and close of valve function piece function is more stable.

Optionally, the valve function cavity has a contour identical to a contour of the valve function piece, and the valve function cavity is aligned with the valve function piece.

Through adopting above-mentioned technical scheme, the appearance profile in valve function chamber is the same with the appearance profile of valve function piece, and valve function chamber aligns each other with the valve function piece, so that the fluid that gets into the valve function chamber distributes in the valve function piece and is close to the one side at pump body place evenly, when the pump head is greater than the pressure of the fluid in the work bag chamber to the pressure that the pump head carried fluid to the work bag chamber, the valve function piece receives fluidic pressure more even, and the deformation of valve function piece is also more even, thereby guarantee that the valve function piece compresses tightly and pressure discharge the state of mouth more stable.

Optionally, the suction flow path includes a suction channel formed on a side of the diaphragm seat away from the dual-function valve plate and a suction hole penetrating through the diaphragm seat, and the suction channel is communicated with the suction hole; the discharge flow path comprises a discharge channel formed on one side of the membrane seat close to the dual-function valve plate, and the suction hole is communicated with the discharge channel and the unloading stopping channel in a one-way mode.

Through adopting above-mentioned technical scheme, fluid enters into the suction hole through suction channel, suction hole and discharge passage and end and unload the one-way intercommunication of passageway, and the pump body forms two functional runners with the cooperation of difunctional valve block, compares in the simple integrated pressure relief valve on fluid pump, and flow path structure has greatly been optimized to this technical scheme to reduce the volume by a wide margin, improve the suitability of this pump head, so that this pump head has more application scenes.

Optionally, a flow guide boss is arranged on one side, where the pump head is located, of the dual-function valve plate, and the flow guide boss is provided with a flow guide channel used for guiding the fluid in the output flow path to the pressure relief flow path.

By adopting the technical scheme, the flow guide boss is provided with the flow guide channel, so that in the process of relieving the pressure of the working bag cavity, the flow guide channel can guide the fluid in the output flow path to the pressure relief flow path, the condition that the fluid generates turbulence at the joint position of the output flow path and the pressure relief flow path is improved, and the operation stability of the pump head is improved.

In a second aspect, the present application provides an integrated pump-valve structure, which adopts the following technical solutions:

a pump valve body structure contains foretell pump head, and this pump valve body structure still includes:

the pump body comprises a diaphragm seat and a cup sac, the diaphragm seat is installed on one side, away from the upper cover, of the diaphragm seat, the cup sac is installed between the diaphragm seat and the diaphragm seat, and a fluid inlet channel for allowing fluid to enter the suction channel is formed in the diaphragm seat; the cup bag is provided with a movable bag cavity and an inlet one-way valve plate, the movable bag cavity is used for communicating the suction channel with the suction hole, the inlet one-way valve plate is attached to the opening end face of the side, facing the membrane seat, of the suction hole, and the inlet one-way valve plate enables the fluid inlet channel to be communicated with the suction channel in one way along the working direction;

and the driving mechanism is used for driving the movable capsule cavity to compress or expand.

By adopting the technical scheme, the fluid enters the diaphragm seat from the fluid inlet channel, the movable bag cavity communicates the suction channel of the diaphragm seat with the suction hole, meanwhile, the fluid enters the one-way valve plate and is attached to the opening end surface of the suction hole facing to the side where the diaphragm seat is located, and the fluid enters the one-way valve plate to communicate the fluid inlet channel with the suction channel in one way along the working direction. The driving mechanism drives the movable bag cavity to expand, and the movable bag cavity can pump fluid from the fluid inlet channel to the membrane seat suction channel; the driving mechanism drives the movable bag cavity to contract, the fluid inlet channel is communicated with the suction channel along the working direction in a one-way mode through the one-way valve plate, the movable bag cavity can press the fluid in the suction channel to the suction hole, and the fluid is transferred to the working bag cavity through the pump head, so that the function of the pump is achieved. When the driving mechanism stops operating, the movable bag cavity can not continuously supplement fluid into the pump head, so that the pressure of the fluid conveyed by the pump head to the working bag cavity is lower than the pressure of the fluid in the working bag cavity, the fluid flows to the discharge check valve plate from the output flow path, the discharge check valve plate blocks the discharge flow path, the fluid in the output flow path changes the valve function plate from a state of being tightly pressed against the pressure relief nozzle into a state of being separated from the pressure relief nozzle, so that the valve function plate communicates the output flow path with the pressure relief flow path, and the integrated function of the pump valve is realized.

Optionally, actuating mechanism including install in the diaphragm seat is kept away from the base of diaphragm seat place one side, the pedestal mounting has the motor, the coaxial eccentric wheel that is fixed with on the output shaft of motor, the steel shaft is installed to the slope on the eccentric wheel, the steel shaft is kept away from the bent axle is installed to the one end of eccentric wheel, the bent axle drive movable bag chamber compression or expansion.

Through adopting above-mentioned technical scheme, install in the motor of base and order about the eccentric wheel and take place to rotate, when the eccentric wheel rotated, the steel axle that the slope set up on the eccentric wheel took place to swing, and the bent axle was installed to the one end that the eccentric wheel was kept away from to the steel axle, and the steel axle drives the bent axle and carries out reciprocal swing, and the bent axle is reciprocal to drive movable bag chamber and is compressed or expand to realize the function of drive movable bag chamber reciprocating motion.

Optionally, the crankshaft is provided with a driving mounting hole, one side of the cup bag, which is close to the crankshaft, is provided with a driving mounting column, and the driving mounting column is in clamping fit with the driving mounting hole.

Through adopting above-mentioned technical scheme, because the cooperation of drive mounting hole on the bent axle and the drive erection column joint on the cup bag to make the drive erection column of installing on the bent axle drive the cup bag and take place periodic motion, thereby realize the bent axle to the periodic output power of cup bag.

Optionally, the pump valve integrated structure further comprises a fixed clamping hook, the base is provided with a second fixed clamping groove, the upper cover is provided with a first fixed clamping groove, one end of the fixed clamping hook is in clamping fit with the first fixed clamping groove, and the other end of the fixed clamping hook is in clamping fit with the second fixed clamping groove.

Through adopting above-mentioned technical scheme, the one end and the cooperation of first fixed slot joint of fixed pothook, the other end and the cooperation of second fixed slot joint of fixed pothook, fixed pothook can dismantle pump head, the pump body and actuating mechanism fixed to make actuating mechanism, the pump body and pump head can separately maintain and change, improve the maintenance convenience of this pump valve body structure.

In summary, the present application includes at least one of the following beneficial technical effects:

1. in order to achieve the predetermined target pressure in the working bladder chamber, the pressure at which the pump head delivers fluid to the working bladder chamber is increased, resulting in a gradual increase in the pressure in the dump flow path. The valve function sheet selectively communicates the output flow path with the pressure relief flow path, the suction one-way valve sheet, the discharge check valve sheet and the valve function sheet are all designed on the dual-function valve sheet, the function of the valve body is integrated on the basis of improving the pump structure, the system configuration is simplified, the integrated function of the pump valve is realized only in the three-layer structure of the upper cover, the diaphragm seat and the diaphragm seat, the flow path structure is optimized, a new flow path is designed, the performance reliability of the integrated structure of the pump valve can be changed, the dual-function valve sheet is closed when fluid is pumped into the working bag cavity, and the dual-function valve sheet is opened when air is leaked, so that the dual-function reliability of the pump valve is realized, and the required performance of a product is met;

2. when the fluid flows along the working direction, the pressure of the fluid conveyed to the working bag cavity by the pump head is greater than the pressure of the fluid in the working bag cavity, so that the valve function piece is tightly propped against the pressure relief nozzle, and the output flow path and the pressure relief flow path are blocked by the valve function piece; when the pump head stops conveying fluid, the pressure of the fluid conveyed to the working bag cavity by the pump head is smaller than the pressure of the fluid in the working bag cavity, the fluid flows to the discharge check valve plate from the output flow path, the discharge check valve plate blocks the discharge flow path, and the fluid in the output flow path separates the valve function plate from the pressure relief nozzle, so that the valve function plate communicates the output flow path with the pressure relief flow path, and the integrated function of the pump and the valve is realized;

3. the driving mechanism drives the movable bag cavity to contract, the movable bag cavity can press the fluid in the suction channel into the suction hole, and the fluid is transferred into the working bag cavity through the pump head, so that the function of the pump is realized. When the driving mechanism stops operating, the movable bag cavity can not continuously supplement fluid into the pump head, so that the pressure of the fluid conveyed by the pump head to the working bag cavity is lower than the pressure of the fluid in the working bag cavity, and the fluid in the output flow passage separates the valve function piece from the pressure relief nozzle, so that the pump valve integrates double functions.

Drawings

FIG. 1 is a schematic view showing the overall structure of an integrated pump-valve structure according to an embodiment of the present invention;

FIG. 2 is a schematic view of the pump head of an embodiment of the present application, showing the pump head in a bottom view from below;

FIG. 3 is a schematic diagram of the construction of a pump head according to an embodiment of the present application, showing a top view of the pump head from above at an angle;

fig. 4 is a schematic structural view of the pump body and the drive mechanism in the embodiment of the present application.

Description of reference numerals:

100. a pump head;

110. an upper cover; 111. an output nozzle; 112. a pressure relief nozzle; 113. a first fixed slot; 114. a communicating groove;

120. a diaphragm seat; 121. a discharge stopping channel; 122. a valve function chamber; 123. a suction channel; 124. a suction hole; 125. a discharge passage;

130. a dual-function valve plate; 131. sucking a one-way valve plate; 132. a discharge check valve plate; 133. a valve function piece; 134. a flow guide boss; 1341. a flow guide channel;

200. a pump body;

210. a diaphragm seat; 211. a fluid inlet channel;

220. a cup pouch; 221. a movable capsule cavity; 222. entering a one-way valve plate; 223. a drive mounting post;

300. a drive mechanism;

310. a base; 311. a second fixed clamping groove;

320. a motor;

330. an eccentric wheel; 331. an eccentric hole;

340. a steel shaft;

350. a crankshaft; 351. a drive mounting hole;

400. the hook is fixed.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a pump valve integrated structure. Referring to fig. 1, an integrative structure of pump valve, from top to bottom include pump head 100 in proper order, pump body 200 and actuating mechanism 300, wherein, pump head 100, pump body 200 and actuating mechanism 300 are fixed through fixed pothook 400 lock, so that actuating mechanism 300, pump body 200 and pump head 100 can separately maintain and change, improve the maintenance convenience of the integrative structure of this pump valve, in this embodiment, the fluid passage in the integrative structure of pump valve sets up to two, two fluid passages are central symmetry setting along the central axis of the integrative structure direction of height of this pump valve. For convenience of description, all the fluid passages described below are one of the fluid passages in the integrated structure of the pump valve.

Referring to fig. 1 and 2, the pump head 100 includes an upper cover 110, a dual function valve sheet 130, and a diaphragm seat 120, the dual function valve sheet 130 being installed between the upper cover 110 and the diaphragm seat 120. The upper cover 110 is substantially rectangular, and an output nozzle 111 is disposed on an upper end surface of the upper cover 110, and the output nozzle 111 is used for communicating with the working bag cavity. A through hole is vertically formed through the output nozzle 111, an output flow path is formed in the through hole of the output nozzle 111, a communication groove 114 is formed in the lower end surface of the upper cover 110, and the communication groove 114 communicates with the output flow path. The bottom of the communicating groove 114 is provided with a pressure relief nozzle 112, and the height of the pressure relief nozzle 112 is lower than the depth of the communicating groove 114. The pressure relief nozzle 112 has a through hole formed vertically therethrough, and a pressure relief flow path is formed in the through hole of the pressure relief nozzle 112.

Referring to fig. 2 and 3, the dual function valve plate 130 is substantially a rectangular parallelepiped plate, the dual function valve plate 130 is integrally formed with a suction check valve plate 131, a discharge check valve plate 132, and a valve function plate 133, the suction check valve plate 131 is substantially disc-shaped, a connection edge of the suction check valve plate 131 is connected to the dual function valve plate 130, and other sides of the suction check valve plate 131 are separated from the dual function valve plate 130, so that the suction check valve plate 131 can rotate along the connection edge of the suction check valve plate 131. Similarly, the discharge check valve sheet 132 has the same structure as the suction check valve sheet 131. The valve function sheet 133 is substantially in the shape of a thin disk, the outer peripheral surface of the valve function sheet 133 is connected to the dual function valve sheet 130, the center of the valve function sheet 133 is protruded, and the center of the valve function sheet 133 is higher than the side position. The valve function piece 133 has elasticity, and the center position of the valve function piece 133 can be moved up and down by the fluid pressure.

Referring to fig. 2 and 3, a guide boss 134 is disposed on a side of the dual function valve plate 130 facing the pump head 100, the guide boss 134 is provided with a guide passage 1341, and the guide passage 1341 is used for guiding the fluid in the output flow path to the pressure relief flow path. During the pressure relief of the working bag cavity, the flow guide passage 1341 can guide the fluid in the output flow path to the pressure relief flow path, thereby improving the condition that the fluid is turbulent at the joint position of the output flow path and the pressure relief flow path, and improving the operation stability of the pump head 100.

Referring to fig. 2 and 3, the diaphragm seat 120 is provided in a substantially rectangular parallelepiped shape. The upper end surface of the diaphragm seat 120 is provided with an accommodating groove, and the dual-function valve sheet 130 is installed in the accommodating groove. The bottom of the containing groove is provided with a discharge channel 125 and a discharge stopping channel 121, the bottom of the containing groove is also provided with a suction hole 124, and the suction hole 124 vertically penetrates through the containing groove. The lower end surface of the diaphragm seat 120 is provided with a suction passage 123, and the suction hole 124 communicates with the suction passage 123. A discharge flow path is formed in the discharge passage 125, a discharge flow path is formed in the discharge stop passage 121, and a suction flow path is formed by the suction passage 123 and the suction hole 124.

Referring to fig. 2 and 3, the bottom end surface of the dual function valve sheet 130 abuts against the bottom of the receiving groove, and the suction check valve sheet 131 connects the suction flow path and the discharge flow path in one direction along the working direction. The suction flow path is directed to the discharge stopping flow path in the discharge stopping direction, and the suction check valve sheet 131 connects the suction flow path and the discharge stopping flow path in one direction along the discharge stopping direction. The discharge check plate 132 provides one-way communication between the discharge flow path and the output flow path in the operating direction. The valve function plate 133 moves up and down, and the valve function plate 133 has elasticity, and abuts against the pressure relief nozzle 112 or is separated from the pressure relief nozzle 112 by the valve function plate 133, so that the valve function plate 133 selectively communicates the output flow path with the pressure relief flow path.

Referring to fig. 2 and 3, there are two fluid flow paths within the pump head 100, the first being fluid entering the working chamber through the intake, discharge and output flow paths, and the second being fluid entering the check flow path from the intake flow path in the check direction. When the fluid is continuously conveyed into the working balloon cavity, the pressure in the working balloon cavity is gradually increased. To achieve the desired target pressure in the working chamber, the pressure at which the pump head 100 delivers fluid to the working chamber is increased, resulting in a gradual increase in the pressure in the dump flow path. When the pressure of the fluid conveyed to the working bag cavity by the pump head 100 is higher than the pressure of the fluid in the working bag cavity, the pressure of the fluid in the discharge stopping flow path is higher than the pressure of the fluid in the output flow path, and at the moment, the output flow path is blocked from the discharge flow path by the valve function sheet 133, and the discharge flow path is in a closed state; when the pressure of the fluid delivered to the working bladder cavity by the pump head 100 is lower than the pressure of the fluid in the working bladder cavity, the pressure of the fluid in the discharge stopping flow path is lower than the pressure of the fluid in the discharge flow path, and the valve function piece 133 communicates the discharge flow path with the discharge flow path, thereby completing the discharge action.

Referring to fig. 2 and 3, the state that the valve function piece 133 is pressed against the pressure relief nozzle 112 is ensured to be more stable, the unloading stop channel 121 is provided with the valve function cavity 122, the contour of the valve function cavity 122 is the same as that of the valve function piece 133, and the valve function cavity 122 is aligned with the valve function piece 133, so that the fluid entering the valve function cavity 122 is uniformly distributed on the side where the valve function piece 133 is close to the pump body 200, when the pressure of the fluid conveyed by the pump head 100 to the working bag cavity is greater than that of the fluid in the working bag cavity, the pressure of the fluid on the valve function piece 133 is more uniform, the deformation of the valve function piece 133 is more uniform, and the sealing effect of the valve function piece 133 is better.

Referring to fig. 1 and 4, the pump body 200 includes a diaphragm seat 210 and a cup bladder 220, and the diaphragm seat 210 is mounted to a lower end surface of the diaphragm seat 120. The cup bladder 220 is installed between the diaphragm seat 210 and the diaphragm seat 120, and the diaphragm seat 210 is formed with a fluid inlet passage 211, and the fluid inlet passage 211 is used for allowing fluid to enter the suction passage 123 of the bottom end face of the diaphragm seat 120. In this embodiment, the fluid inlet passage 211 is an air inlet hole. In further embodiments, the fluid inlet passage 211 may also be provided as a liquid delivery tube; the cup pocket 220 has a movable pocket cavity 221 and an inlet check valve sheet 222, the movable pocket cavity 221 is disposed in a substantially bell shape, and the movable pocket cavity 221 is used to communicate the suction passage 123 with the suction hole 124. The inlet check valve sheet 222 is attached to an opening end surface of the side of the suction hole 124 facing the diaphragm seat 120, so that the inlet check valve sheet 222 connects the fluid inlet passage 211 and the suction passage 123 in one direction along the working direction.

Referring to fig. 4, the driving mechanism 300 includes a base 310 installed at the bottom end of the diaphragm seat 210, a motor 320 is fixedly installed at the bottom end surface of the base 310 through bolts, an eccentric wheel 330 is coaxially fixed on an output shaft of the motor 320, an eccentric hole 331 is formed at the upper end surface of the eccentric wheel 330, a steel shaft 340 is obliquely installed in the eccentric hole 331, a crankshaft 350 is installed at one end of the steel shaft 340 far away from the eccentric wheel 330, and the crankshaft 350 drives the movable bag cavity 221 to compress or expand. In order to improve the wear resistance of the eccentric wheel 330 and the steel shaft 340, a steel column is installed in the eccentric hole 331, and the steel shaft 340 abuts against the steel column. The crankshaft 350 is provided with a driving mounting hole 351, one side of the cup bag 220 close to the crankshaft 350 is provided with a driving mounting column 223, and the driving mounting column 223 is in clamping fit with the driving mounting hole 351. The motor 320 drives the eccentric wheel 330 to rotate, the steel shaft 340 obliquely arranged on the eccentric wheel 330 swings, the steel shaft 340 drives the crankshaft 350 to swing in a reciprocating mode, and the driving mounting hole 351 in the crankshaft 350 is in clamping fit with the driving mounting column 223 in the cup bag 220, so that the driving mounting column 223 mounted on the crankshaft 350 drives the cup bag 220 to move periodically, the crankshaft 350 outputs power to the cup bag 220 periodically, and the function of driving the movable bag cavity 221 to move in a reciprocating mode is achieved.

Referring to fig. 1, in order to improve the maintenance convenience of the integrated pump valve structure, the base 310 is provided with a second fixing clip slot 311, the upper cover 110 is provided with a first fixing clip slot 113, one end of the fixing clip 400 is in clip fit with the first fixing clip slot 113, and the other end of the fixing clip 400 is in clip fit with the second fixing clip slot 311. The fixing hooks 400 detachably fix the pump head 100, the pump block 200, and the driving mechanism 300, so that the driving mechanism 300, the pump block 200, and the pump head 100 can be separately maintained and replaced.

The implementation principle of the integrative structure of pump valve of the embodiment of this application does: the motor 320 drives the eccentric wheel 330 to rotate, the eccentric wheel 330 drives the cup bag 220 to move through the steel shaft 340 and the crankshaft 350, on one hand, pumped fluid reaches a designated closed space, on the other hand, forward pressurization is carried out on the valve function piece 133 to close a pressure relief channel, after the motor 320 is powered off, the fluid in the closed space flows back, reverse pressurization is carried out on the valve function piece to open the valve bag to relieve pressure, the check valve plate 132 is discharged to ensure that the fluid in the closed space cannot flow back to the forward direction of the valve function piece 133, and therefore the desired dual functions of the pump valve are achieved stably and reliably.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereby. Wherein like parts are designated by like reference numerals. It should be noted that as used in the foregoing description, the terms "front," "back," "left," "right," "upper" and "lower" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component. Therefore, the method comprises the following steps: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A pump head, comprising:

an upper cover (110), wherein an output flow path for communicating with the working bag cavity and a pressure relief flow path selectively communicated with the output flow path are formed on the upper cover (110);

the diaphragm seat (120) is provided with a suction flow path, a discharge flow path and a stop flow path, and the suction flow path, the discharge flow path and the output flow path are communicated along the working direction in a one-way mode;

the double-function valve plate (130) is arranged between the upper cover (110) and the diaphragm seat (120), and the double-function valve plate (130) is provided with a suction one-way valve plate (131), a discharge check valve plate (132) and a valve function plate (133); the suction check valve plate (131) enables the suction flow path and the discharge flow path to be communicated in a single direction along the working direction, the suction flow path faces the unloading stopping flow path in the unloading stopping direction, and the suction check valve plate (131) enables the suction flow path and the unloading stopping flow path to be communicated in the unloading stopping direction in a single direction; the discharge check valve plate (132) enables the discharge flow path and the output flow path to be communicated in one direction along the working direction; the valve function plate (133) selectively communicates the output flow path with the pressure relief flow path.

2. A pump head as claimed in claim 1, wherein the upper cover (110) is provided with an output nozzle (111) for inputting fluid to the working chamber and a pressure relief nozzle (112) for discharging fluid from the working chamber, the output flow path being formed at the output nozzle (111) and the pressure relief flow path being formed at the pressure relief nozzle (112); when fluid flows along the working direction, the valve function sheet (133) abuts against the pressure relief nozzle (112) and blocks the output flow path from the pressure relief flow path; when the pump head stops conveying fluid, the fluid flows to the discharge check valve plate (132) from the output flow path, the discharge check valve plate (132) blocks the discharge flow path from the output flow path, the valve function plate (133) is separated from the pressure relief nozzle (112), and the output flow path is communicated with the pressure relief flow path.

3. A pump head (100) as claimed in claim 2, wherein the anti-release flow path comprises an anti-release channel (121) formed in the diaphragm seat (120), a valve function chamber (122) is provided on a side of the anti-release channel (121) facing the dual function valve plate (130), the valve function sheet (133) seals the valve function chamber (122) against an open end face of the side of the dual function valve plate (130), the valve function sheet (133) has elasticity, and pressure of fluid in the valve function chamber (122) controls the valve function sheet (133) to be pressed against or separated from the pressure release nozzle (112).

4. A pumphead (100) as claimed in claim 3, wherein the valve function chamber (122) has a profile which is the same as the profile of the valve function plate (133), and the valve function chamber (122) is aligned with the valve function plate (133).

5. A pump head (100) as claimed in claim 4, wherein the suction flow path comprises a suction passage (123) formed in the diaphragm seat (120) on a side remote from the dual function valve plate (130) and a suction aperture (124) extending through the diaphragm seat (120), the suction passage (123) communicating with the suction aperture (124); the discharge flow path comprises a discharge channel (125) formed on one side of the membrane sheet seat (120) close to the dual-function valve sheet (130), and the suction hole (124) is communicated with the discharge channel (125) and the check-release channel (121) in a one-way mode.

6. A pump head (100) as claimed in claim 3, wherein the side of the dual function valve plate (130) facing the pump head (100) is provided with a flow guide projection (134), the flow guide projection (134) being provided with a flow guide channel (1341) for guiding fluid in the output flow path to the pressure relief flow path.

7. A pump valve unitary structure comprising a pump head as claimed in claim 5, wherein the pump valve unitary structure further comprises:

the pump body (200), the pump body (200) comprises a diaphragm seat (210) and a cup sac (220), the diaphragm seat (210) is installed on one side, away from the upper cover (110), of the diaphragm seat (120), the cup sac (220) is installed between the diaphragm seat (210) and the diaphragm seat (120), and a fluid inlet channel (211) for allowing fluid to enter the suction channel (123) is formed in the diaphragm seat (210); the cup bag (220) is provided with a movable bag cavity (221) and an inlet one-way valve plate (222), the movable bag cavity (221) is used for communicating the suction channel (123) with the suction hole (124), the inlet one-way valve plate (222) is attached to the opening end face of the side, facing the membrane seat (120), of the suction hole (124), and the inlet one-way valve plate (222) enables the fluid inlet channel (211) and the suction channel (123) to be communicated in one direction along the working direction;

a driving mechanism (300) for driving the movable capsule cavity (221) to compress or expand.

8. A pump and valve integrated structure as claimed in claim 7, wherein the driving mechanism (300) comprises a base (310) installed on one side of the diaphragm seat (210) far away from the diaphragm seat (120), a motor (320) is installed on the base (310), an eccentric wheel (330) is coaxially fixed on an output shaft of the motor (320), a steel shaft (340) is installed on the eccentric wheel (330) in an inclined manner, a crankshaft (350) is installed at one end, far away from the eccentric wheel (330), of the steel shaft (340), and the crankshaft (350) drives the movable bag cavity (221) to compress or expand.

9. A pump-valve integrated structure as claimed in claim 8, wherein the crankshaft (350) is provided with a driving mounting hole (351), a side of the cup bag (220) close to the crankshaft (350) is provided with a driving mounting post (223), and the driving mounting post (223) is in snap fit with the driving mounting hole (351).

10. The pump-valve integrated structure as claimed in claim 9, further comprising a fixing hook (400), wherein the base (310) is provided with a second fixing hook (311), the upper cover (110) is provided with a first fixing hook (113), one end of the fixing hook (400) is snap-fitted with the first fixing hook (113), and the other end of the fixing hook (400) is snap-fitted with the second fixing hook (311).