CN210769232U

CN210769232U - Pump and liquid conveying equipment

Info

Publication number: CN210769232U
Application number: CN201921483392.6U
Authority: CN
Inventors: 马昆
Original assignee: Hunan Dihong Wulian Technology Co ltd
Current assignee: Hunan Dihong Wulian Technology Co ltd
Priority date: 2019-09-08
Filing date: 2019-09-08
Publication date: 2020-06-16
Anticipated expiration: 2029-09-08

Abstract

The utility model provides a pump and liquid conveying equipment, include: the control valve body comprises an electromagnetic coil, a sealing shell, a valve core assembly and a valve assembly, wherein the electromagnetic coil is used for generating electromagnetic force to drive the valve core assembly in the sealing shell to move so as to enable the valve assembly to open or close a valve port of the third chamber, so that the connection between the second chamber and the first chamber is opened or closed, and when the pump stops, in a system in which the liquid pressure in the pump cannot be rapidly released through an output end pipeline, the problem that the liquid pressure gradually drops is solved, and the purpose of rapidly releasing the liquid pressure in the pump is achieved.

Description

Pump and liquid conveying equipment

Technical Field

The invention relates to the technical field of liquid conveying machinery and spraying, in particular to a pump and liquid conveying equipment.

Background

When conveying and pressurizing liquid, a booster pump is generally used, the pump for fluid pressurization is mainly a displacement pump, positive and negative pressure is generated by changing the volume in a pump cavity, so as to convey and pressurize the liquid, such as a diaphragm pump, which is a special form in the displacement pump, the volume of a working chamber is changed by back and forth movement of one or more diaphragm sheets so as to convey and pressurize the liquid, in a spraying system jointly built by nozzles, the diaphragm pump sprays the liquid through the nozzles after pressurizing the liquid, when a driving mechanism is composed of a motor, when the motor is powered off in the booster pump, because a rotor inside the motor continues to rotate until the motor is completely stopped under the action of inertia, because the through diameter of an orifice of the nozzle is small, the liquid pressure cannot be discharged immediately, and because air detained in a spraying pipeline or in the booster pump, elastic deformation of the pipeline and other factors, make the liquid pressure that descends gradually appear in nozzle department to cause the gradual grow of nozzle spun droplet granule until the dropping liquid, cause and spray inhomogeneous, and the waste that the dropping liquid caused.

Disclosure of Invention

The embodiment of the invention provides a pump and liquid conveying equipment, which are used for solving the problem that the liquid pressure is gradually reduced in a system that the liquid pressure in the pump cannot be quickly released through an output end pipeline when the pump stops and achieving the purpose of quickly releasing the liquid pressure in the pump.

According to a first aspect of embodiments of the present invention, there is provided a pump comprising:

the pump body comprises a liquid inlet and a liquid outlet, a first cavity, a pressurization cavity, a second cavity and a third cavity which are sequentially communicated are arranged on the pump body, and a driving mechanism is arranged on the pump body and used for changing the volume in the pressurization cavity so as to suck liquid into the pressurization cavity from the first cavity and convey the liquid in the pressurization cavity to the second cavity; the first chamber is connected with the liquid inlet, the second chamber is connected with the liquid outlet, the third chamber is connected with the first chamber through a third liquid flow channel, the third chamber comprises a third chamber valve port, and the third chamber is connected with the second chamber by opening the third chamber valve port;

the control valve body comprises an electromagnetic coil, a sealing shell, a valve core assembly and a valve assembly, wherein the electromagnetic coil is used for generating electromagnetic force to drive the valve core assembly in the sealing shell to act, so that the valve assembly opens or closes the valve port of the third chamber, and the connection between the second chamber and the first chamber is opened or closed.

Optionally, the valve assembly includes a valve seat and a diaphragm, where the valve seat and the diaphragm are fixedly connected to each other in a matching manner, and the valve seat is configured to press the diaphragm when the third chamber valve port is closed, so that the diaphragm seals the third chamber valve port, and to drive the diaphragm to leave the third chamber valve port when the third chamber valve port is opened.

Optionally, the pump body includes a diaphragm accommodating groove, the diaphragm is accommodated in the diaphragm accommodating groove, the fixing shell presses against the sealing shell, so that an edge portion of the diaphragm is engaged and clamped by the sealing shell and the diaphragm accommodating groove, the valve core assembly and the valve assembly are sealed in the pump body, a valve cavity is formed between the sealing shell and the valve assembly, and the second cavity and the third cavity are formed between the valve assembly and the pump body.

Optionally, a first through hole and a second through hole are formed in the valve seat, wherein the first through hole is used for communicating the second chamber with the valve cavity; the second through hole is connected with the third chamber and is used for communicating the third chamber with the valve cavity when the valve port of the third chamber needs to be opened.

Optionally, the valve core assembly includes a valve rod and a valve core, and the valve core is fixed to one end of the valve rod, wherein the valve rod is used for acquiring electromagnetic force of the electromagnetic coil to move, so as to drive the valve core to move, so as to open or close connection between the second through hole and the valve cavity.

Optionally, the pump body includes main part, diaphragm and one-way valve seat, control valve body set up in on the main part, valve component, one-way valve seat and main part cooperation form the second cavity, one-way valve seat with the main part cooperation forms first cavity, the diaphragm with one-way valve seat cooperation forms the pressure boost cavity, the valve component with the main part cooperation forms the third cavity.

Optionally, the driving mechanism includes a motor, a driving wheel, a bearing, and a driving connecting rod, the driving wheel is disposed on an output shaft of the motor, the bearing is mounted on the driving wheel, the driving connecting rod is mounted on the bearing, the driving wheel is an oblique eccentric wheel, and the diaphragm is correspondingly connected to the driving connecting rod, so that the driving connecting rod is driven to reciprocate by the oblique eccentric rotation of the driving wheel, and the diaphragm is driven to reciprocate to change the volume of the pressurizing chamber.

Optionally, the pump body includes main part, diaphragm and pump cover, the diaphragm and the pump cover is fixed in one side of main part and cooperation form the pressure boost cavity, the diaphragm with the main part cooperation forms first cavity with the second cavity, control valve body set up in on the main part, valve assembly with the main part cooperation forms the third cavity.

Optionally, the driving mechanism includes a motor, a driving wheel, a bearing and a driving connecting rod, the driving wheel is disposed on an output shaft of the motor, the bearing is mounted on the driving wheel, the driving connecting rod is sleeved outside the bearing, wherein the driving wheel is an eccentric wheel; the driving connecting rod is correspondingly connected with the diaphragm, so that the driving connecting rod is driven to reciprocate through eccentric rotation of the driving wheel, and the diaphragm is driven to reciprocate to change the volume of the pressurization chamber.

Optionally, the pump body includes a first one-way valve and a second one-way valve that prevent backflow of liquid, wherein the first one-way valve only allows liquid to flow from the first chamber into the plenum chamber and the second one-way valve only allows liquid to flow from the plenum chamber into the second chamber.

According to a second aspect of embodiments of the present invention, there is provided a liquid delivery apparatus comprising an apparatus body, and a pump as described in any one of the above.

The embodiment of the invention can have the following beneficial effects through the technical scheme:

in a system in which the liquid pressure in the pump cannot be quickly released through an output end pipeline, a control valve is arranged between a second chamber and a first chamber, when the pump stops, the valve of the control valve is opened to enable the second chamber to be communicated with the first chamber, so that the liquid pressure is released to the first chamber, and the problem that the liquid pressure in the second chamber gradually drops is solved; for example, in a spraying system constructed by nozzles, the problem that fog drop particles sprayed out of the nozzles are gradually enlarged to drop due to the gradual reduction of the liquid pressure is solved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

In order to more clearly illustrate the embodiments or prior art solutions of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below and used together with the description to explain the principles of the present disclosure.

Fig. 1 is an exploded view of a pump according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a pump according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of a pump according to an embodiment of the present invention.

FIG. 4 is a schematic view of a valve port opening of a third chamber of the pump according to an embodiment of the present invention.

Fig. 5 is a schematic cross-sectional view taken along line E-E of a pump according to an embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view of a pump according to an embodiment of the present invention taken along line D-D.

Fig. 7 is an exploded view of another pump according to an embodiment of the present invention.

Fig. 8 is a schematic view of another pump according to an embodiment of the present invention.

Fig. 9 is a schematic cross-sectional view of another pump according to an embodiment of the present invention taken along the line K-K.

FIG. 10 is a schematic cross-sectional view taken along line J-J of another pump according to an embodiment of the present invention.

FIG. 11 is a schematic cross-sectional view taken along the line L-L of another pump according to an embodiment of the present invention.

Fig. 12 is a schematic cross-sectional view of a pump according to another embodiment of the present invention.

Fig. 13 is a schematic view of a liquid delivery apparatus according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. The first feature being "under," "below," and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Moreover, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

The following description will explain specific embodiments of a pump and a liquid delivery apparatus according to embodiments of the present invention with reference to the accompanying drawings.

According to the technical scheme provided by the embodiment of the invention, when the pump stops, the situation that the liquid pressure in the pipeline linearly drops due to the fact that the rotor in the motor continuously rotates until the pump completely stops under the action of inertia is considered, for example, in a spraying system formed by the pump and the nozzle, fog drop particles sprayed out by the nozzle gradually grow to drop in liquid and the like when the pump stops is considered, and therefore, according to the technical scheme provided by the embodiment of the disclosure, the valve is opened to enable the second chamber to be communicated with the first chamber when the pump stops by arranging the controllable pressure relief valve device between the second chamber and the first chamber, and the liquid pressure in the second chamber is relieved to the first chamber.

The pump provided by the embodiment of the invention, as shown in fig. 1 to 6, comprises a pump body 01 and a control valve body 02.

Specifically, the pump body 01 comprises a liquid inlet 101 and a liquid outlet 102, the pump body 01 is provided with a first cavity 103, a pressurization cavity 104, a second cavity 105, a third cavity 106 and a third liquid flow channel 107 which are sequentially communicated, the first cavity 103 is communicated with the liquid inlet 101, the second cavity 105 is communicated with the liquid outlet 102, and the third cavity 106 is communicated with the first cavity 103 through the third liquid flow channel 107;

the control valve body 02 includes a fixed housing 207, an electromagnetic coil 201, a sealing housing 202, a valve core assembly 203, a valve assembly 204, a first elastic member 2031, a second elastic member 2043, and a valve cavity 205, wherein the valve core assembly 203 includes a valve rod 2032 and a valve core 2033, the valve core 2033 is fixedly connected to one end of the valve rod 2032, the valve core assembly 203 makes the valve rod 2032 move up and down under the action of the electromagnetic coil 201, so as to drive the valve core 2033 to move up and down, for example, when the electromagnetic coil 201 is powered on, the valve rod 2032 moves up under the action of electromagnetic force, when the electromagnetic coil 201 is powered off, the valve rod 2032 loses the electromagnetic force, the first elastic member 2031 recovers to the original state, and the valve rod 2032. The valve core 2033 may be made of different materials, such as rubber.

The valve assembly 204 includes a valve seat 2041 and a diaphragm 2042, the valve seat 2041 and the diaphragm 2042 are connected in a matching manner, wherein the valve seat 2041 is provided with a first through hole 2044 and a second through hole 2045, the first through hole 2044 and the second through hole 2045 penetrate through the diaphragm 2042, the first through hole 2044 is used for communicating the second chamber 105 and the valve cavity 205, and is disposed at the edge of the valve seat 2041, but may be disposed at other positions in other embodiments as long as the second chamber and the valve cavity can be communicated; the second through hole 2045 is used for communicating the third chamber 106 with the valve cavity 205, and is correspondingly matched with the valve core 2033, so that the valve core can block the second through hole 2045; the second elastic component 2043 is used for pressing against the valve seat 2041, and the valve seat 2041 is connected with the diaphragm 2042 in a matching manner, so that the diaphragm 2042 can be pressed against the third chamber valve port 1061 in a sealing manner; the diaphragm 2042 is located between the seal housing 202 and the diaphragm receiving groove 108 of the body portion 110, and the edge portion of the diaphragm 2042 is engaged and clamped by the seal housing 202 and the diaphragm receiving groove 108 by pressing the fixing housing 207 against the seal housing 202, thereby forming the second chamber 105 and the valve chamber 205. The membrane 2042 may be made of a different material, such as a rubber material.

It will be appreciated that the stationary housing 207 may also be other shapes, such as a barrel shape with an open end.

Illustratively, the pump body 01 is provided with a driving mechanism 03, and the driving mechanism 03 is used for changing the volume size of the pressurizing chamber 104, so as to suck the liquid from the first chamber 103 into the pressurizing chamber 104, and output and discharge the liquid in the pressurizing chamber 104 to the second chamber 105, thereby realizing the transportation or pressurization of the liquid.

After the liquid enters the interior of the pump body 01 from the liquid inlet 101, the liquid passes through the first chamber 103 and enters the pressurizing chamber 104 under the action of the driving mechanism 03, for example, the driving mechanism 03 increases the volume of the pressurizing chamber 104, so that the pressure in the pressurizing chamber 104 is reduced, and the liquid in the first chamber 103 flows into the pressurizing chamber 104; then, the liquid in the pressurizing chamber 104 flows out from the pressurizing chamber 104 under the action of the driving mechanism 03, for example, the driving mechanism 03 reduces the volume of the pressurizing chamber 104, so that the pressure in the pressurizing chamber 104 is increased, and the liquid in the pressurizing chamber 104 flows out and flows into the second chamber 105, because the second through hole 2045 is blocked by the valve core 2033, at this time, the pressure in the valve cavity 205 is the same as the pressure in the second chamber 105, a high-low pressure difference is formed around the valve assembly 204, and under the combined action of the pressure difference and the elastic force, the valve assembly 204 presses the third chamber valve port 1061 tightly, the larger the liquid pressure is, the larger the downward pressure acting on the valve seat 2041 is, the larger the force pressing against the diaphragm 2042 is, the better the sealing effect of the diaphragm 2042 for closing the third chamber valve port 1061 is achieved, and the liquid only flows out through the liquid outlet; as shown in fig. 4, when the driving mechanism is stopped, by energizing the electromagnetic coil 201, the valve rod 2032 moves upward under the action of the electromagnetic force, so as to open the second through hole 2045, at this time, the pressure in the valve cavity 205 is relieved into the third chamber 106 through the second through hole 2045, so as to form a pressure difference of low height and high height around the valve assembly 204, under the action of the pressure difference, the liquid pressure pushes the valve assembly 204 to move upward to open the third chamber valve port 1061, at this time, the second chamber 105 is communicated with the first chamber 103 through the third chamber 106, the pressure in the second chamber 105 is relieved to the liquid inlet 101 communicated with the first chamber 103, so as to quickly relieve the liquid pressure in the pipeline communicated with the liquid outlet 102, so that the liquid pressures in the first chamber 103 and the second chamber 105 are the same; for example, when the liquid outlet 102 is connected to a pipe line having a nozzle, when the drive mechanism of the pump is stopped, the solenoid is energized to open the third chamber valve port 1061, and the liquid pressure in the second chamber 105 is discharged to the first chamber 103, so that the liquid pressure at the nozzle can be rapidly reduced, thereby rapidly stopping spraying and preventing the nozzle from dripping.

Further, in other embodiments, in case of de-energizing the solenoid, the valve core assembly is in the uppermost position of the seal housing, i.e. the second through hole is in the open state, and in case of energizing the solenoid, the valve core assembly moves downwards and blocks the second through hole, thereby closing the valve port of the third chamber, so that the solenoid and the driving mechanism can be controlled to be opened or closed simultaneously.

It should be understood that, in the pump provided in the embodiment of the present invention, the control valve body 02 is of a pilot structure, so that the purpose of communicating the first chamber 103 with the second chamber 105 is achieved by opening the third chamber valve port 1061, and the control valve body 02 may also be of a direct-acting structure or a step-by-step direct-acting structure, which please refer to the prior art for specific structure; the control valve body 02 may be driven by a pneumatic or electric method.

In summary, the pump provided in the embodiment of the present invention can solve the problem of gradual decrease of the liquid pressure in the second chamber, and in addition, the pump can be used in a system constructed by a pressure sensor, when the pressure sensor detects that the working pressure of the pump body is greater than a preset pressure value, the electromagnetic coil 201 is powered on to open the third chamber valve port 1061 to release the pressure, and when the pressure sensor detects that the working pressure of the pump body reaches a preset normal pressure value, the electromagnetic coil 201 is powered off to close the third chamber valve port 1061, so as to protect the pump body and the equipment, and output the stable liquid pressure.

With continued reference to fig. 1 and 6, in one embodiment, the pump body 01 includes a main body 110, a diaphragm 113, and a one-way valve seat 111, the diaphragm 113 and the one-way valve seat 111 are fixedly and sealingly engaged to form the pumping chamber 104, the main body 110 and the one-way valve seat 111 are fixedly engaged to form the first chamber 103 and the second chamber 105, and the first sealing ring 1115 is used to prevent fluid leakage between the first chamber 103 and the second chamber 105.

Specifically, the one-way valve seat 111 includes an inlet channel 1114 and an outlet channel 1113, the inlet channel 1114 is connected to the first chamber 103, and the outlet channel 1113 is connected to the pressurizing chamber 104.

To prevent liquid backflow, a first one-way valve 1112 is provided that only allows liquid to flow from the first chamber 103 into the plenum chamber 104 through the inlet channel 1114, and a second one-way valve 1111 is provided that only allows liquid to flow from the plenum chamber 104 into the second chamber 105 through the outlet channel 1113.

In this embodiment, when the pressure in the pressurizing chamber 104 is decreased, the liquid in the first chamber 103 enters the pressurizing chamber 104 through the inlet channel 1114, and when the pressure in the pressurizing chamber 104 is increased, the liquid flows into the second chamber 105 through the outlet channel 1113.

The diaphragm 113 and the main body 110 and the one-way valve seat 111 may be fixedly connected to each other by various means such as adhesion or press-fitting, thereby sealing the outer periphery of the pressurizing chamber 104 and preventing the liquid in the pressurizing chamber 104 from leaking.

In one embodiment of the present invention, the driving mechanism 03 changes the volume of the pressurizing chamber 104 by: the driving mechanism 03 is connected to the diaphragm 113, and the driving mechanism 03 drives the diaphragm 113 to reciprocate to change the volume of the pressurizing chamber 104.

The structure of the driving mechanism can be various, and the structure of the driving mechanism of the embodiment is as follows:

with continuing reference to fig. 1 and fig. 6, the driving mechanism 03 includes a motor 301, a driving wheel 302, a bearing 304 and a driving connecting rod 303, wherein the driving wheel 302 is a tilting eccentric wheel and is disposed on an output shaft 3011 of the motor 301, the bearing 304 is mounted on the driving wheel 302, the driving connecting rod 303 is mounted outside the bearing 304, an end of the driving connecting rod 303 is correspondingly and hermetically connected with the diaphragm 113, and the driving connecting rod 303 connected to the outside of the bearing 304 reciprocates up and down by tilting eccentric rotation of the driving wheel 302, thereby driving the diaphragm 113 to reciprocate up and down; in the embodiment, 3 pressurizing chambers 104 are included, the opposite diaphragm 113 is also divided into 3 parts independent of each other and is respectively and hermetically connected with the end parts of the 3 driving connecting rods, and when the driving wheel 302 rotates obliquely and eccentrically, the 3 driving connecting rods 303 sequentially drive the 3 parts of the diaphragm 113 to reciprocate up and down sequentially, so that the volumes of the 3 pressurizing chambers 104 are sequentially increased or decreased.

It will be appreciated that in other embodiments the number of pressurised chambers may be 1 or more, the number of corresponding drive links and portions of the diaphragm being the same as the number of pressurised chambers.

Another pump according to an embodiment of the present invention, as shown in fig. 7 to 12, includes a pump body 04 and a control valve body 05.

Specifically, the pump body 04 comprises a liquid inlet 401 and a liquid outlet 402, the pump body 04 is provided with a first chamber 403, a pressurization chamber 404, a second chamber 405, a third chamber 406 and a third liquid flow channel 407 which are sequentially communicated, the first chamber 403 is communicated with the liquid inlet 401, the second chamber 405 is communicated with the liquid outlet 402, and the third chamber 406 is communicated with the first chamber 403 through the third liquid flow channel 407;

the control valve body 05 includes a fixed housing 507, an electromagnetic coil 501, a sealing housing 502, a valve core assembly 503, a valve assembly 504, a first elastic component 5031, a second elastic component 5043, and a valve cavity 505, wherein the valve core assembly 503 includes a valve rod 5032 and a valve core 5033, the valve core 5033 is fixedly connected to one end of the valve rod 5032, the valve core assembly 503 moves the valve rod 5032 up and down under the action of the electromagnetic coil 501, so as to drive the valve core 5033 to move up and down, for example, when the electromagnetic coil 501 is energized, the valve rod 5032 moves up under the action of electromagnetic force, and when the electromagnetic coil 501 is de-energized, the valve rod 5032 loses the electromagnetic force, so that the first elastic component 5031 recovers to the original shape, and the valve rod.

The valve assembly 504 comprises a valve seat 5041 and a diaphragm 5042, the valve seat 5041 and the diaphragm 5042 are mutually matched and connected, wherein the valve seat 5041 is provided with a first through hole 5044 and a second through hole 5045, the first through hole 5044 and the second through hole 5045 penetrate through the diaphragm 5042, the first through hole 5044 is used for communicating the second chamber 405 with the valve cavity 505 and is arranged at the edge of the valve seat 5041, and of course, the valve assembly can be arranged at other positions in other embodiments as long as the second chamber 405 can be communicated with the valve cavity 505; the second through hole 5045 is used for communicating the third chamber 406 with the valve chamber 505, and is correspondingly matched with the valve core 5033, so that the valve core can seal the second through hole 5045; the second elastic component 5043 is used for pressing against the valve seat 5041, the valve seat 5041 is matched and connected with the membrane 5042, so that the membrane 5042 can be pressed against the third chamber valve port 4061 in a sealing way; the diaphragm 5042 is located between the seal housing 502 and the diaphragm receiving groove 408 of the body portion 410, and the edge portion of the diaphragm 5042 is fitted and clamped to each other by the seal housing 502 and the diaphragm receiving groove 408 by pressing the fixing housing 507 against the seal housing 502, thereby forming the second chamber 405 and the valve chamber 505.

It is understood that the stationary housing 507 may have other shapes, such as a barrel shape with an open end.

Illustratively, the pump body 04 is provided with a driving mechanism 06, and the driving mechanism 06 is used for changing the volume of the pressurizing chamber 404, so as to suck the liquid from the first chamber 403 into the pressurizing chamber 404, and output and discharge the liquid in the pressurizing chamber 404 to the second chamber 405, thereby realizing the transportation or pressurization of the liquid.

After the liquid enters the interior of the pump body 04 from the liquid inlet 401, the liquid passes through the first chamber 403 and enters the pressurizing chamber 404 under the action of the driving mechanism 06, for example, the driving mechanism 06 increases the volume of the pressurizing chamber 404, so that the pressure in the pressurizing chamber 404 is reduced, and the liquid in the first chamber 403 flows into the pressurizing chamber 404; then, the liquid in the pressurizing chamber 404 flows out from the pressurizing chamber 404 under the action of the driving mechanism 06, for example, the driving mechanism 06 reduces the volume of the pressurizing chamber 404, so that the pressure in the pressurizing chamber 404 increases, and the liquid in the pressurizing chamber 404 flows out and flows into the second chamber 405, because the second through hole 5045 is blocked by the valve core 5033, the pressure in the valve cavity 505 is the same as the pressure in the second chamber 405, a high-low pressure difference is formed around the valve assembly 504, under the combined action of the pressure difference and the elastic force, the valve assembly 504 presses the third chamber valve port 4061, the larger the liquid pressure is, the larger the downward pressure on the valve seat 5041 is, the larger the force pressing the diaphragm 5042 is, the sealing effect of the diaphragm 5042 closing the third chamber valve port 4061 is better, and the liquid only flows out through the liquid outlet 402; when the driving mechanism stops, the electromagnetic coil 501 is energized, the valve rod 5032 moves upwards under the action of electromagnetic force to open the second through hole 5045, at the moment, the pressure in the valve cavity 505 is relieved into the third chamber 406 through the second through hole 5045, a high-low pressure difference is formed around the valve assembly 504, under the action of the pressure difference, the liquid pressure pushes the valve assembly 504 to move upwards to open the valve port 4061 of the third chamber, at the moment, the second chamber 405 is communicated with the first chamber 403 through the third chamber 406, and the pressure in the second chamber 405 is relieved to the liquid inlet 403 communicated with the first chamber 403, so that the liquid pressure in the pipeline communicated with the liquid outlet 402 is quickly relieved, and the liquid pressure in the first chamber 405 is the same as that in the second chamber 405; for example, when the liquid outlet 402 is connected to a pipe line having a nozzle, when the drive mechanism of the pump is stopped, the solenoid is energized to open the third chamber valve port 4061 and release the liquid pressure in the second chamber 405 to the first chamber 403, so that the liquid pressure at the nozzle can be rapidly reduced, thereby rapidly stopping spraying and preventing the nozzle from dripping.

It should be understood that, in the pump provided in this embodiment, the control valve body 05 is of a pilot structure, so that the purpose of communicating the first chamber 403 with the second chamber 405 is achieved by opening the third chamber valve port 4061, and the control valve body 05 may also be of a direct-acting structure or a step-by-step direct-acting structure, and the specific structure refers to the prior art; the control valve 05 may be driven by a pneumatic or electric method.

In summary, the pump provided in the embodiment of the present invention can solve the problem of gradual decrease of the liquid pressure in the second chamber, and in addition, the pump can be used in a system constructed by a pressure sensor, when the pressure sensor detects that the working pressure of the pump body is greater than a preset pressure value, the electromagnetic coil 201 is powered on to open the third chamber valve port 4061 to release the pressure, and when the pressure sensor detects that the working pressure of the pump body reaches a preset normal pressure value, the electromagnetic coil 501 is powered off to close the third chamber valve port 4061, so as to protect the pump body and the equipment, and output the stable liquid pressure.

Referring to fig. 7 and 10, in an embodiment, the pump body 04 includes a main body 410, a diaphragm 413, and a pump cover 412, the first chamber 403 and the second chamber 405 are disposed on the main body 410, the diaphragm 413 and the pump cover 412 are fixed on one side of the main body and cooperate to form the pumping chamber 404, the diaphragm 413 cooperates with the main body 410 to form the first chamber 403 and the second chamber 405, the control valve 05 is disposed on the main body 410, and the valve assembly 504 cooperates with the main body 410 to form the third chamber 406.

To prevent fluid backflow, a first check valve 4112 is provided to allow fluid to flow only from the first chamber 403 into the pressurizing chamber 404, and a second check valve 4111 is provided to allow fluid to flow only from the pressurizing chamber 404 into the second chamber 405, wherein the first check valve 4112 is coupled to the first check valve mounting hole 4212 of the diaphragm 413, and the second check valve 4111 is coupled to the second check valve mounting hole 4211 of the diaphragm 413.

It is understood that the diaphragm 413 and the pump cap 412 may be fixedly coupled by various means such as bonding, pressing, etc.

In one embodiment of the present invention, the drive mechanism 06 varies the volume of the plenum chamber 404 by: the driving mechanism 06 is connected to the diaphragm 413, and changes the volume of the pressurizing chamber 404 by driving the diaphragm 413 to reciprocate.

referring to fig. 7, 10 and 12, the driving mechanism 06 includes a motor 601 disposed on the main body 04, a driving wheel 602, a bearing 604 and a driving connecting rod 603, the driving wheel 602 is disposed on an output shaft of the motor 601, the bearing 604 is mounted on the driving wheel 602, the driving connecting rod 603 is sleeved outside the bearing 604, an end of the driving connecting rod 603 is connected to a side of the diaphragm 413 away from the pump cover 412, and the driving connecting rod 603 is driven to reciprocate by the bearing 604 through eccentric rotation of the driving wheel 602, so as to drive the diaphragm 413 to reciprocate.

For example, as shown in fig. 12, the middle of the driving link 603 forms a kidney-shaped groove, the waist of the kidney-shaped groove is parallel to the plane of the diaphragm 413, the driving wheel 602 is located in the kidney-shaped groove, and during the rotation of the driving wheel 602, the side far away from the rotation point is pressed to the inner wall of one waist of the kidney-shaped groove of the driving link 603, so as to push the end of the waist of the link to move toward the pressurizing chamber 404.

It is worth mentioning that in some embodiments, the pump body comprises only one pressurizing chamber 404, while in other embodiments, the pump body comprises two or more pressurizing chambers 404.

In the case that the pump body 04 includes two pressurizing chambers 404, in order to facilitate driving, a set of pump cover 412 and a diaphragm 413 are respectively disposed on two opposite sides of the main body portion 410, and then the pressurizing chambers 404 are symmetrically formed on two opposite sides of the main body portion 410, as shown in fig. 7 and 12, the driving mechanism 06 is disposed between the two diaphragms 413, and then drives the two diaphragms 413 to move in opposite directions, so that the two pressurizing chambers alternately suck and discharge liquid, and the liquid flow rate is increased.

In summary, the pump provided in the two embodiments of the present invention can be applied to a system (e.g. a spraying system) in which the liquid pressure in the booster pump cannot be rapidly released through the output pipeline when the booster pump is stopped, and in practical applications, when the booster pump is stopped, there are various factors that affect the rapid drop of the liquid pressure, such as the following situations: firstly, due to the factors of a driving mechanism, for example, the driving mechanism consisting of a motor, the rotor of the motor inside cannot be stopped immediately due to the inertia effect, so that the liquid pressure is linearly reduced; air which cannot be exhausted is arranged in the second chamber or the pipeline at the output end, and due to compressibility of the air, when the driving mechanism stops, the liquid pressure is reduced, meanwhile, the volume of the air is increased due to reduction of the liquid pressure of the air compressed in the pipeline, and when the volume is increased, the liquid pressure cannot be rapidly reduced; thirdly, the elastic deformation of the pipeline can also influence the speed of the reduction of the liquid pressure; therefore, the control valve is additionally arranged between the second chamber and the first chamber, when the driving mechanism stops, the valve in the control valve is immediately opened, so that the second chamber is immediately communicated with the first chamber, when the liquid pressure in the first chamber is normal pressure, the liquid automatically flows from the high pressure area to the low pressure area, so that the liquid pressure in the second chamber is quickly released to the first chamber, the liquid pressure in the second chamber is quickly reduced to the normal pressure state, and the problem that the liquid pressure is gradually reduced is avoided; therefore, according to the technical solution provided by the present invention, and the two embodiments of the present invention, other types of booster pumps can be easily conceived to achieve the purpose of quickly discharging the liquid pressure in the booster pump when the driving mechanism is stopped.

The invention also provides a liquid conveying device, as shown in fig. 13, and fig. 13 is a schematic view of the liquid conveying device of the invention. The liquid transport apparatus includes an apparatus main body 07, and a pump 08 including any of the embodiments described above, and the pump 08 is mounted on the apparatus main body 07.

For example, the main body 07 is a spraying system main body, the pump 08 is installed on the spraying system main body and is connected with a liquid inlet port 71 and a liquid outlet port 72 on the main body 07, wherein the liquid inlet port 71 is used for connecting a liquid inlet pipe (not shown in the figure), the liquid outlet port 72 is used for connecting a spraying pipeline (not shown in the figure), and a nozzle (not shown in the figure) is arranged on the spraying pipeline; the pump 08 obtains liquid from the liquid inlet pipe through the liquid inlet interface 71, and outputs the liquid to the spraying pipeline from the liquid outlet interface 72 after the liquid is pressurized, so that the liquid with pressure is provided for the nozzle, and the aim of spraying is fulfilled; when the spraying needs to be stopped, the driving mechanism on the pump 08 is controlled to stop, and meanwhile, the control valve on the pump 08 is controlled to open, so that the liquid pressure at the nozzle is rapidly reduced, the spraying is rapidly stopped, and the nozzle is prevented from dripping.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A pump, comprising:

2. The pump of claim 1, wherein the valve assembly comprises a valve seat and a diaphragm, wherein the valve seat and the diaphragm are cooperatively and fixedly connected, and the valve seat is configured to compress the diaphragm when the third chamber valve port is closed, so that the diaphragm seals the third chamber valve port, and to move the diaphragm away from the third chamber valve port when the third chamber valve port is opened.

3. The pump of claim 2, wherein the pump body includes a diaphragm receiving groove, the diaphragm is correspondingly received in the diaphragm receiving groove such that an edge portion of the diaphragm is engaged and clamped by the seal housing and the diaphragm receiving groove, thereby sealing the valve core assembly and the valve assembly in the pump body, and a valve cavity is formed between the seal housing and the valve assembly, and the second chamber and the third chamber are formed between the valve assembly and the pump body.

4. The pump of claim 3, wherein the valve seat is provided with a first through hole and a second through hole, wherein the first through hole is used for communicating the second chamber and the valve cavity; the second through hole is connected with the third chamber and is used for communicating the third chamber with the valve cavity when the valve port of the third chamber needs to be opened.

5. The pump of claim 4, wherein the valve core assembly comprises a valve rod and a valve core, and the valve core is fixed at one end of the valve rod, wherein the valve rod is used for acquiring the electromagnetic force of the electromagnetic coil to move, so as to drive the valve core to move, and the second through hole is connected with the valve cavity in an opening or closing mode.

6. The pump of claim 1, wherein the pump body includes a main body portion, a diaphragm, and a one-way valve seat, the control valve body being disposed on the main body portion, the valve assembly, the one-way valve seat, and the main body portion cooperating to form the second chamber, the one-way valve seat and the main body portion cooperating to form the first chamber, the diaphragm and the one-way valve seat cooperating to form a pumping chamber, the valve assembly and the main body portion cooperating to form the third chamber.

7. The pump of claim 6, wherein the drive mechanism includes a motor, a drive wheel disposed on an output shaft of the motor, a bearing mounted on the drive wheel, and a drive link mounted on the bearing, wherein the drive wheel is a tilt eccentric, and wherein the diaphragm is correspondingly connected to the drive link for reciprocating the drive link by rotation of the tilt eccentric of the drive wheel to thereby reciprocate the diaphragm to change the volume of the pumping chamber.

8. The pump of claim 1, wherein the pump body includes a main body portion, a diaphragm, and a pump cover, the diaphragm and the pump cover secured to one side of the main body portion and cooperating to form the pumping chamber, the diaphragm cooperating with the main body portion to form the first chamber and the second chamber, the control valve body disposed on the main body portion, the valve assembly cooperating with the main body portion to form the third chamber.

9. The pump of claim 8, wherein the drive mechanism comprises a motor, a drive wheel, a bearing, and a drive link, the drive wheel is disposed on an output shaft of the motor, the bearing is mounted on the drive wheel, the drive link is sleeved outside the bearing, wherein the drive wheel is an eccentric wheel; the driving connecting rod is correspondingly connected with the diaphragm, so that the driving connecting rod is driven to reciprocate through eccentric rotation of the driving wheel, and the diaphragm is driven to reciprocate to change the volume of the pressurization chamber.

10. The pump of claim 6 or 8, wherein the pump body includes a first one-way valve and a second one-way valve that prevent backflow of liquid, wherein the first one-way valve only allows liquid to flow from the first chamber into the plenum chamber and the second one-way valve only allows liquid to flow from the plenum chamber into the second chamber.

11. A liquid delivery apparatus comprising an apparatus body, and a pump as claimed in any one of claims 1 to 10.