Pump and liquid conveying equipment

Abstract

The present invention provides a pump and liquid conveying equipment, including: a pump body including a liquid inlet, a first liquid outlet and a second liquid outlet, the pump body is provided with a first chamber, a boost chamber, a second chamber and a third chamber which are connected in sequence, the pump body is provided with a driving mechanism, the driving mechanism is used to change the volume size in the boost chamber; a control valve body, including an electromagnetic coil, a sealing shell, a valve core assembly and a valve assembly, the electromagnetic coil is used to generate electromagnetic force to drive the valve core assembly in the sealing shell to move, so that the valve assembly opens or closes the valve port of the third chamber, thereby opening or closing the connection between the second chamber and the first chamber, and is used to solve the problem of gradual decrease in liquid pressure in a system where the liquid pressure in the pump cannot be quickly released through the output end pipeline when the pump stops, thereby achieving the purpose of quickly releasing the liquid pressure in the pump, and removing the air in the liquid inlet pipe and the pump as soon as possible, thereby improving the liquid suction efficiency.

Description

Technical Field

[0001] The present invention relates to the field of liquid conveying machinery and spraying technology, in particular to a pump and liquid conveying equipment. Background Art

[0002] When transporting liquids and pressurizing them, a booster pump is usually used. The pump used for fluid pressurization is mainly a positive displacement pump, which generates positive and negative pressure by changing the volume in the pump chamber, thereby transporting and pressurizing the liquid. For example, a diaphragm pump is a more special form of positive displacement pump. It relies on the back and forth agitation of one or more diaphragms to change the volume of the working chamber to transport and pressurize the fluid. In a spray system composed of nozzles, the diaphragm pump pressurizes the liquid and sprays it through the nozzle. When the driving mechanism is composed of a motor, when the motor in the booster pump is powered off, the rotor inside the motor will continue to rotate until it completely stops due to inertia. Since the nozzle orifice diameter is very small, the liquid pressure cannot be released immediately. Due to factors such as air trapped in the spray pipe or the booster pump, and the elastic deformation of the pipe itself, the liquid pressure at the nozzle gradually decreases, causing the droplets sprayed from the nozzle to gradually become larger until they drip, resulting in uneven spraying and waste caused by dripping.

[0003] When the pump is working, air may enter the pump due to insufficient liquid or the liquid has been sucked out. In the next suction process of the pump, the gas-liquid mixture in the pump and the output pipe needs to be discharged first to extract the air in the liquid inlet pipe, thereby generating negative pressure to suck the liquid into the pump. Due to the compressibility of gas, the pump is in an idling state, and the liquid or gas-liquid mixture in the output pipe cannot be discharged as soon as possible, which greatly increases the suction time or even makes it impossible to suck liquid, causing damage to the pump. Summary of the Invention

[0004] An embodiment of the present invention provides a pump and a liquid conveying device, which are used to solve the problem of gradual decrease in liquid pressure in a system where the liquid pressure in the pump cannot be quickly released through the output end pipeline when the pump stops, thereby achieving the purpose of quickly releasing the liquid pressure in the pump; and removing air from the liquid inlet pipe and the pump as soon as possible to improve the liquid suction efficiency.

[0005] According to a first aspect of an embodiment of the present invention, there is provided a pump, comprising:

[0006] A pump body, comprising a liquid inlet, a first liquid outlet, and a second liquid outlet; the pump body being provided with a first chamber, a boost chamber, a second chamber, and a third chamber, which are sequentially connected; the pump body being provided with a drive mechanism, the drive mechanism being used to change the volume of the boost chamber to draw liquid from the first chamber into the boost chamber and to transfer the liquid in the boost chamber to the second chamber; the first chamber being connected to the liquid inlet, the second chamber being connected to the first liquid outlet, and the third chamber being connected to the second liquid outlet; the third chamber including a third chamber valve port, the third chamber being connected to the second chamber by opening the third chamber valve port;

[0007] The control valve body includes an electromagnetic coil, a sealing shell, a valve core assembly and a valve assembly. The electromagnetic coil is used to generate electromagnetic force to drive the valve core assembly in the sealing shell to operate, so that the valve assembly opens or closes the valve port of the third chamber, thereby opening or closing the connection between the second chamber and the second liquid outlet.

[0008] Optionally, the valve assembly includes a valve seat and a diaphragm, wherein the valve seat and the diaphragm are fixedly connected to each other, and the valve seat is used to press the diaphragm when closing the third chamber valve port so that the diaphragm seals the third chamber valve port, and to drive the diaphragm away from the third chamber valve port when opening the third chamber valve port.

[0009] Optionally, the pump body includes a diaphragm accommodating groove, and the diaphragm is correspondingly accommodated in the diaphragm accommodating groove. The fixed shell is pressed against the sealing shell, so that the edge portion of the diaphragm is cooperated and clamped by the sealing shell and the diaphragm accommodating groove, so that the valve core assembly and the valve assembly are sealed in the pump body, and a valve cavity is formed between the sealing shell and the valve assembly, and the second chamber and the third chamber are formed between the valve assembly and the pump body.

[0010] Optionally, a first through hole and a second through hole are provided on the valve seat, wherein the first through hole is used to connect the second chamber and the valve chamber; the second through hole is connected to the third chamber, and when the valve port of the third chamber needs to be opened, the second through hole is used to connect the third chamber and the valve chamber.

[0011] Optionally, the valve core assembly includes a valve stem and a valve core, and the valve core is fixed to one end of the valve stem, wherein the valve stem is used to obtain the electromagnetic force of the electromagnetic coil to move, thereby driving the valve core to move to open or close the connection between the second through hole and the valve cavity.

[0012] Optionally, the pump body includes a main body, a diaphragm and a one-way valve seat, the control valve body is arranged on the main body, the valve assembly, the one-way valve seat and the main body cooperate to form the second chamber, the one-way valve seat and the main body cooperate to form the first chamber, the diaphragm and the one-way valve seat cooperate to form a boosting chamber, and the valve assembly and the main body cooperate to form the third chamber.

[0013] Optionally, the driving mechanism includes a motor, a driving wheel, a bearing and a driving connecting rod, the driving wheel is arranged on the output shaft of the motor, the bearing is installed on the driving wheel, and the driving connecting rod is installed on the bearing, wherein the driving wheel is an inclined eccentric wheel, and the diaphragm is correspondingly connected to the driving connecting rod to drive the driving connecting rod to reciprocate through the inclined eccentric rotation of the driving wheel, thereby driving the diaphragm to reciprocate to change the volume of the boost chamber.

[0014] Optionally, the pump body includes a main body, a diaphragm and a pump cover, the diaphragm and the pump cover are fixed to one side of the main body and cooperate to form the boost chamber, the diaphragm and the main body cooperate to form the first chamber and the second chamber, the control valve body is arranged on the main body, and the valve assembly cooperates with the main body to form the third chamber.

[0015] Optionally, the driving mechanism includes a motor, a driving wheel, a bearing and a driving connecting rod, the driving wheel is arranged on the output shaft of the motor, the bearing is installed on the driving wheel, and the driving connecting rod is sleeved outside the bearing, wherein the driving wheel is an eccentric wheel; the driving connecting rod is correspondingly connected to the diaphragm to drive the driving connecting rod to reciprocate through the eccentric rotation of the driving wheel, thereby driving the diaphragm to reciprocate to change the volume of the boost chamber.

[0016] Optionally, the pump body includes a first one-way valve and a second one-way valve for preventing liquid backflow, wherein the first one-way valve only allows liquid to flow from the first chamber into the boosting chamber, and the second one-way valve only allows liquid to flow from the boosting chamber into the second chamber.

[0017] According to a second aspect of an embodiment of the present invention, there is provided a liquid delivery device, comprising a device body and any one of the pumps described above.

[0018] The embodiments of the present invention can achieve the following beneficial effects through the above technical solutions:

[0019] In a system where the liquid pressure in the pump cannot be quickly released through the output end pipeline, a control valve is set between the second chamber and the third chamber. When the pump stops, the second chamber is connected to the third chamber by opening the valve of the control valve, so that the liquid pressure is discharged to the third chamber, thereby solving the problem of the gradual decrease in liquid pressure in the second chamber; for example, in a spray system constructed by a nozzle, the problem of the droplets sprayed from the nozzle gradually becoming larger until they drip due to the gradual decrease in liquid pressure is solved; and in the process of the pump sucking liquid, the gas-liquid mixture is discharged through the second liquid outlet to remove the air in the liquid inlet pipe and the pump as soon as possible, thereby improving the suction efficiency.

[0020] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art, and uses them together with the description to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is an exploded diagram of a pump provided in an embodiment of the present invention.

[0023] Figure 2 A schematic diagram of a pump provided in accordance with an embodiment of the present invention.

[0024] Figure 3 This is a schematic AA cross-sectional view of a pump provided by an embodiment of the present invention.

[0025] Figure 4 Schematic diagram of the opening of the third chamber valve port of the pump provided in an embodiment of the present invention.

[0026] Figure 5 This is a CC cross-sectional schematic diagram of a pump provided by an embodiment of the present invention.

[0027] Figure 6 This is a schematic cross-sectional diagram of the pump provided by an embodiment of the present invention along line BB.

[0028] Figure 7 An exploded diagram of another pump provided in an embodiment of the present invention.

[0029] Figure 8 A schematic diagram of another pump provided in an embodiment of the present invention.

[0030] Figure 9A KK cross-sectional schematic diagram of another pump provided in an embodiment of the present invention.

[0031] Figure 10 A JJ cross-sectional schematic diagram of another pump provided in an embodiment of the present invention.

[0032] Figure 11 LL cross-sectional schematic diagram of another pump provided by an embodiment of the present invention.

[0033] Figure 12 This is a schematic MM cross-sectional view of another pump provided by an embodiment of the present invention.

[0034] Figure 13 A schematic diagram of a liquid delivery device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention.

[0036] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] In the description of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] The disclosure below provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art will recognize the application of other processes and / or the use of other materials.

[0040] The following describes a specific implementation of a pump and a liquid delivery device provided by an embodiment of the present invention in conjunction with the accompanying drawings.

[0041] The technical solutions provided by the embodiments of the present invention take into account the fact that when a pump stops, the rotor inside the motor will continue to rotate due to inertia until it comes to a complete stop. This can cause factors such as trapped air in the pipeline or elastic deformation of the pipeline itself, resulting in a linear decrease in the liquid pressure in the pipeline. For example, in a spray system constructed by a pump and a nozzle, when the pump stops, the droplets sprayed from the nozzle gradually increase in size until they become drips. Furthermore, during the pump's aspiration process, when there is no liquid in the inlet pipe and the outlet pipe contains liquid or a gas-liquid mixture, the liquid or gas-liquid mixture in the outlet pipe cannot be discharged quickly enough, significantly increasing the aspiration time or even preventing aspiration. Therefore, the technical solutions provided by the embodiments of the present disclosure address these factors by providing a controllable pressure relief valve device between the second and third chambers. When the pump stops, the valve opens, connecting the second and third chambers, thereby releasing the liquid pressure in the second chamber into the third chamber. Furthermore, during the aspiration process, the air or gas-liquid mixture discharged from the pump is discharged through the second liquid outlet.

[0042] A pump provided by an embodiment of the present invention, such as Figures 1 to 6 As shown, it includes a pump body 01 and a control valve body 02.

[0043] Specifically, the pump body 01 includes a liquid inlet 101, a first liquid outlet 102, and a second liquid outlet 107. The pump body 01 is provided with a first chamber 103, a pressurizing chamber 104, a second chamber 105, and a third chamber 106 that are sequentially connected. The first chamber 103 is connected to the liquid inlet 101, the second chamber 105 is connected to the first liquid outlet 102, and the third chamber 106 is connected to the second liquid outlet 107.

[0044] 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 component 2031, a second elastic component 2043, and a valve chamber 205. The valve core assembly 203 includes a valve stem 2032 and a valve core 2033. The valve core 2033 is fixedly connected to one end of the valve stem 2032. Under the action of the electromagnetic coil 201, the valve core assembly 203 causes the valve stem 2032 to move up and down, thereby driving the valve core 2033 to move up and down. For example, when the electromagnetic coil 201 is energized, the valve stem 2032 moves upward under the action of the electromagnetic force. When the electromagnetic coil 201 is de-energized, the valve stem 2032 loses the electromagnetic force, the first elastic component 2031 returns to its original state, and the elastic force causes the valve stem 2032 to move downward. The valve core 2033 can be made of various materials, such as rubber.

[0045] The valve assembly 204 includes a valve seat 2041 and a diaphragm 2042, which are connected to each other in a cooperative manner. The valve seat 2041 is provided with a first through hole 2044 and a second through hole 2045, wherein the first through hole 2044 and the second through hole 2045 pass through the diaphragm 2042. The first through hole 2044 is used to connect the second chamber 105 with the valve cavity 205 and is provided at the edge of the valve seat 2041. Of course, in other embodiments, it can also be provided at other positions as long as it can connect the second chamber and the valve cavity; the second through hole 2045 is used to connect the third chamber 106 with the valve cavity 205, and correspondingly cooperates with the valve core 2033 to enable the valve core to block the second through hole 2045; the second elastic member 2043 is used to press against the valve seat 2041, and the valve seat 2041 is cooperatively connected to the diaphragm 2042, so that the diaphragm 2042 can be sealed and pressed against the valve port 1061 of the third chamber; the diaphragm 2042 is located between the sealing shell 202 and the diaphragm receiving groove 108 of the main body 110. The fixed shell 207 presses against the sealing shell 202, so that the edge of the diaphragm 2042 is mutually cooperated and clamped by the sealing shell 202 and the diaphragm receiving groove 108, thereby forming the second chamber 105 and the valve cavity 205. The diaphragm 2042 can be made of various materials, for example, rubber.

[0046] It is understandable that the fixed shell 207 may also be in other shapes, such as a barrel shape with one end open.

[0047] Furthermore, the pump provided in the embodiment of the present invention also includes a quick-connect assembly 109 for quickly plugging and unplugging the pipes connected to the pump, wherein the quick-connect assembly 109 includes a pressure plate 1091, a ferrule 1092, a claw 1093, a chuck 1094 and a sealing ring 1095. The ferrule 1092 is connected to the pump body 01 to fix the quick-connect assembly 109. The pressure plate 1091 is inserted into the ferrule 1092, and the chuck 1094 is used to cooperate with the ferrule 1092 to clamp the claw 1093. When the pipe fitting is inserted into the quick-connect assembly 109, the claw 1093 clamps the pipe wall to prevent the pipe fitting from falling off, and the sealing ring 1095 surrounds the pipe wall to play a sealing role; when the pipe fitting needs to be pulled out, the pressure plate 1091 is pressed to squeeze the claw 1093, so that the claw 1093 is deformed and separated from the pipe wall, and the pipe fitting can be pulled out, thereby facilitating the plugging and unplugging of the pipe fitting.

[0048] Explanatory, a driving mechanism 03 is provided on the pump body 01, and the driving mechanism 03 is used to change the volume of the boosting chamber 104 so as to suck the liquid from the first chamber 103 into the boosting chamber 104, and output the liquid in the boosting chamber 104 to the second chamber 105 and discharge it, thereby realizing the transportation or pressurization of the liquid.

[0049] After the liquid enters the interior of the pump body 01 from the liquid inlet 101, it enters the boost chamber 104 through the first chamber 103 under the action of the driving mechanism 03. For example, the driving mechanism 03 increases the volume of the boost chamber 104, so that the pressure in the boost chamber 104 decreases, thereby causing the liquid in the first chamber 103 to flow into the boost chamber 104; then, the liquid in the boost chamber 104 flows out of the boost chamber 104 under the action of the driving mechanism 03. For example, the driving mechanism 03 reduces the volume of the boost chamber 104, so that the pressure in the boost chamber 104 increases, thereby causing the liquid in the boost chamber 104 to The liquid flows out and flows into the second chamber 105. Since the second through hole 2045 is blocked by the valve core 2033, the pressure in the valve chamber 205 is the same as the pressure in the second chamber 105. A pressure difference is formed around the valve assembly 204, with higher pressure at the top and lower pressure at the bottom. Under the combined action of the pressure difference and the elastic force, the valve assembly 204 is pressed against the valve port 1061 of the third chamber. The greater the liquid pressure, the greater the downward pressure acting on the valve seat 2041, and the greater the force pressing against the diaphragm 2042, so that the diaphragm 2042 has a better sealing effect in closing the valve port 1061 of the third chamber, so that the liquid only flows out through the first liquid outlet 102. Figure 4As shown, when the driving mechanism stops, by energizing the electromagnetic coil 201, the valve stem 2032 moves upward under the action of the electromagnetic force, thereby opening the second through hole 2045. At this time, the pressure in the valve cavity 205 is released into the third chamber 106 through the second through hole 2045, thereby forming a pressure difference around the valve component 204, with the upper part being lower and the lower part being higher. Under the action of the pressure difference, the liquid pressure pushes the valve component 204 to move upward to open the third chamber valve port 1061. At this time, the second chamber 105 is connected to the third chamber 106 through the third chamber 106. The second liquid outlet 107 is connected, thereby quickly releasing the liquid pressure in the pipeline connected to the first liquid outlet 102, so that the liquid pressure in the second chamber 105 is the same as that in the third chamber 106; for example, when the first liquid outlet 102 is connected to the pipeline with the nozzle, when the driving mechanism of the pump stops, the electromagnetic coil is energized to open the third chamber valve port 1061, so that the liquid pressure in the second chamber 105 is released to the third chamber 106, which can quickly reduce the liquid pressure at the nozzle, thereby quickly stopping the spraying and preventing the nozzle from dripping.

[0050] In some practical applications, when the pump is sucking liquid, when there is no liquid in the liquid inlet pipe, the air in the liquid inlet pipe must be extracted first to generate negative pressure to suck the liquid into the pump. The pump provided by the embodiment of the present invention can be operated by energizing the electromagnetic coil 201 during the liquid suction process, so that the valve stem 2032 moves upward under the action of the electromagnetic force, thereby opening the second through hole 2045. When the pipeline system connected to the first liquid outlet requires pressure to work (such as a spray system or a filtration system), since the second liquid outlet 107 can be a normal pressure discharge port, the pressure in the second chamber 105 is greater than that in the third chamber 106. , at this time, the pressure in the valve cavity 205 is released into the third chamber 106 through the second through hole 2045, thereby forming a pressure difference around the valve component 204, with lower pressure at the top and higher pressure at the bottom. Under the action of the pressure difference, the liquid pressure pushes the valve component 204 to move upward to open the third chamber valve port 1061. At this time, the second chamber 105 is connected with the second liquid outlet 107 through the third chamber 106, so that the gas-liquid mixture in the second chamber 105 is discharged from the second liquid outlet, and the air in the liquid inlet pipe is pumped out by the pump to generate negative pressure, thereby sucking liquid into the pump, so that the pump works normally.

[0051] Furthermore, in other embodiments, when the electromagnetic coil is powered off, the valve core assembly is at the uppermost position of the sealing shell, that is, the second through hole is in an open state. When the electromagnetic coil is powered on, the valve core assembly moves downward and blocks the second through hole, thereby closing the valve port of the third chamber. Therefore, the electromagnetic coil and the drive mechanism can be controlled to open or close at the same time.

[0052] It should be understood that the pump provided in the embodiment of the present invention has a control valve body 02 of a pilot structure. Therefore, the purpose of connecting the third chamber 106 with the second chamber 105 is achieved by opening the third chamber valve port 1061. The control valve body 02 can also be a direct-acting structure or a step-by-step direct-acting structure. For the specific structure, please refer to the prior art; in addition, the driving mode of the control valve body 02 can also be pneumatic or electric.

[0053] To sum up, the pump provided by the embodiment of the present invention can solve the problem of the gradual decrease in liquid pressure in the second chamber. In addition, it can also be used in a system constructed with a pressure sensor. When the pressure sensor detects that the working pressure of the pump body is greater than the preset pressure value, the electromagnetic coil 201 is energized to open the third chamber valve port 1061 to release the pressure, until the pressure sensor detects that the working pressure of the pump body reaches the preset normal pressure value, the electromagnetic coil 201 is de-energized to close the third chamber valve port 1061, thereby protecting the pump body and equipment, and outputting a stable liquid pressure. Therefore, the pump provided by the embodiment of the present invention can realize automatic control of the working pressure of the pump body by connecting a sensor, as well as the purpose of real-time or remote adjustment of the working pressure of the pump body.

[0054] Please continue reading Figure 1 and Figure 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 sealed and fixedly matched to form a pressurization chamber 104. The main body 110 and the one-way valve seat 111 are fixedly matched to form a first chamber 103 and a second chamber 105. A first sealing ring 1115 is used to prevent leakage between the first chamber 103 and the second chamber 105.

[0055] Specifically, the one-way valve seat 111 includes a liquid inlet channel 1114 and a liquid outlet channel 1113 . The liquid inlet channel 1114 is connected to the first chamber 103 , and the liquid outlet channel 1113 is connected to the pressurization chamber 104 .

[0056] In order to prevent liquid backflow, a first one-way valve 1112 is provided that only allows liquid to flow from the first chamber 103 through the liquid inlet channel 1114 into the boosting chamber 104, and a second one-way valve 1111 is provided that only allows liquid to flow from the boosting chamber 104 through the liquid outlet channel 1113 into the second chamber 105.

[0057] In this embodiment, when the pressure in the boost chamber 104 decreases, the liquid in the first chamber 103 enters the boost chamber 104 through the liquid inlet channel 1114. When the pressure in the boost chamber 104 increases, the liquid flows into the second chamber 105 through the liquid outlet channel 1113.

[0058] The diaphragm 113 can be fixedly connected to the main body 110 and the one-way valve seat 111 by various means such as bonding and pressing, so as to seal the periphery of the pressurization chamber 104 and prevent the liquid in the pressurization chamber 104 from leaking.

[0059] In one embodiment of the present invention, the driving mechanism 03 changes the volume of the boost chamber 104 in the following manner: the driving mechanism 03 is connected to the diaphragm 113 , and the driving mechanism 03 changes the volume of the boost chamber 104 by driving the diaphragm 113 to reciprocate.

[0060] The structure of the driving mechanism can be various. The structure of the driving mechanism of this embodiment is as follows:

[0061] Please continue reading Figure 1 and Figure 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 an inclined eccentric wheel, which is arranged on the output shaft 3011 of the motor 301, the bearing 304 is installed on the driving wheel 302, and the driving connecting rod 303 is installed on the outside of the bearing 304. The end of the driving connecting rod 303 is sealed and connected to the diaphragm 113. Through the inclined eccentric rotation of the driving wheel 302, the driving connecting rod 303 connected to the outside of the bearing 304 is caused to reciprocate up and down, thereby driving the diaphragm 113 to reciprocate up and down; in this embodiment, four boosting chambers 104 are included, and the relative diaphragms 113 are also divided into four independent parts and are respectively sealed and connected to the ends of the four driving connecting rods. When the driving wheel 302 rotates obliquely and eccentrically, the four driving connecting rods 303 drive the four parts of the diaphragm 113 to reciprocate up and down in turn, thereby increasing or decreasing the volume of the four boosting chambers 104 in turn.

[0062] It is understandable that in other embodiments, the number of the boost chambers may be one or more, and the number of the corresponding drive links and the number of the diaphragm portions is the same as the number of the boost chambers.

[0063] Another pump provided by an embodiment of the present invention is Figures 7 to 12 As shown, it includes a pump body 04 and a control valve body 05.

[0064] Specifically, the pump body 04 includes a liquid inlet 401, a first liquid outlet 402, and a second liquid outlet 407. The pump body 04 is provided with a first chamber 403, a pressurizing chamber 404, a second chamber 405, and a third chamber 406 that are sequentially connected. The first chamber 403 is connected to the liquid inlet 401, the second chamber 405 is connected to the first liquid outlet 402, and the third chamber 406 is connected to the second liquid outlet 407.

[0065] The control valve body 05 includes a fixed shell 507, an electromagnetic coil 501, a sealing shell 502, a valve core assembly 503, a valve assembly 504, a first elastic component 5031, a second elastic component 5043 and a valve chamber 505, wherein the valve core assembly 503 includes a valve stem 5032 and a valve core 5033, and the valve core 5033 is fixedly connected to one end of the valve stem 5032. Under the action of the electromagnetic coil 501, the valve core assembly 503 causes the valve stem 5032 to move up and down, thereby driving the valve core 5033 to move up and down. For example, when the electromagnetic coil 501 is energized, the valve stem 5032 moves upward under the action of the electromagnetic force. When the electromagnetic coil 501 is de-energized, the valve stem 5032 loses the electromagnetic force, the first elastic component 5031 returns to its original state, and the valve stem 5032 moves downward under the action of the elastic force.

[0066] The valve assembly 504 includes a valve seat 5041 and a diaphragm 5042, which are connected to each other. The valve seat 5041 is provided with a first through hole 5044 and a second through hole 5045, wherein the first through hole 5044 and the second through hole 5045 pass through the diaphragm 5042. The first through hole 5044 is used to connect the second chamber 405 with the valve cavity 505, and is provided at the edge of the valve seat 5041. Of course, in other embodiments, it can also be provided at other positions as long as it can connect the second chamber 405 with the valve cavity 505; the second through hole 5045 is used to connect the third chamber 406 It corresponds to the valve cavity 505 and the valve core 5033, so that the valve core can block the second through hole 5045; the second elastic component 5043 is used to press against the valve seat 5041, and the valve seat 5041 is connected with the diaphragm 5042, so that the diaphragm 5042 can be sealed and pressed against the valve port 4061 of the third chamber; the diaphragm 5042 is located between the sealing shell 502 and the diaphragm accommodating groove 408 of the main body 410, and is pressed against the sealing shell 502 by the fixed shell 507, so that the edge part of the diaphragm 5042 is matched and clamped by the sealing shell 502 and the diaphragm accommodating groove 408, thereby forming the second chamber 405 and the valve cavity 505.

[0067] It is understandable that the fixed shell 507 may also be in other shapes, such as a barrel shape with one end open.

[0068] Explanatory, a driving mechanism 06 is provided on the pump body 04, and the driving mechanism 06 is used to change the volume of the boosting chamber 404 to suck the liquid from the first chamber 403 into the boosting chamber 404, and output the liquid in the boosting chamber 404 to the second chamber 405 and discharge it, thereby realizing the transportation or pressurization of the liquid.

[0069] After the liquid enters the interior of the pump body 04 from the liquid inlet 401, it enters the boosting chamber 404 through the first chamber 403 under the action of the driving mechanism 06. For example, the driving mechanism 06 increases the volume of the boosting chamber 404, so that the pressure in the boosting chamber 404 is reduced, thereby causing the liquid in the first chamber 403 to flow into the boosting chamber 404; then, the liquid in the boosting chamber 404 flows out of the boosting chamber 404 under the action of the driving mechanism 06. For example, the driving mechanism 06 reduces the volume of the boosting chamber 404, so that the pressure in the boosting chamber 404 is reduced. The pressure increases, causing the liquid in the pressurized chamber 404 to flow out and into the second chamber 405. Since the second through hole 5045 is blocked by the valve core 5033, the pressure in the valve chamber 505 is now the same as the pressure in the second chamber 405. A pressure difference is formed around the valve assembly 504, with higher pressure at the top and lower pressure at the bottom. Under the combined action of the pressure difference and the elastic force, the valve assembly 504 is pressed against the valve port 4061 of the third chamber. The greater the liquid pressure, the greater the downward pressure on the valve seat 5041, and the greater the force pressing against the diaphragm 5042, causing the diaphragm 5042 to close the valve of the third chamber. The sealing effect of the port 4061 is better, so that the liquid only flows out through the first liquid outlet 402; when the driving mechanism stops, the electromagnetic coil 501 is energized, and the valve stem 5032 moves upward under the action of the electromagnetic force, thereby opening the second through hole 5045. At this time, the pressure in the valve cavity 505 is released into the third chamber 406 through the second through hole 5045, forming a pressure difference around the valve assembly 504, with the upper part lower and the lower part higher. Under the action of the pressure difference, the liquid pressure pushes the valve assembly 504 to move upward to open the valve port 4061 of the third chamber. At this time, the second chamber 4 05 is connected to the second liquid outlet 407 through the third chamber 406, thereby quickly releasing the liquid pressure in the pipeline connected to the first liquid outlet 402, so that the liquid pressure in the second chamber 405 is the same as that in the third chamber 406; for example, when the first liquid outlet 402 is connected to the pipeline with the nozzle, when the driving mechanism of the pump stops, the electromagnetic coil is energized to open the third chamber valve port 4061, so that the liquid pressure in the second chamber 405 is released to the third chamber 406, which can quickly reduce the liquid pressure at the nozzle, thereby quickly stopping the spraying and preventing the nozzle from dripping.

[0070] In some practical applications, when the pump is sucking liquid, when there is no liquid in the liquid inlet pipe, the air in the liquid inlet pipe must be extracted first to generate negative pressure to suck the liquid into the pump. The pump provided by the embodiment of the present invention can be operated by energizing the electromagnetic coil 501 during the liquid suction process, so that the valve stem 5032 moves upward under the action of the electromagnetic force, thereby opening the second through hole 5045. When the pipeline system connected to the first liquid outlet requires pressure to work (such as a spray system or a filtration system), since the second liquid outlet 407 can be a normal pressure discharge port, the pressure in the second chamber 405 is greater than that in the third chamber 406. Pressure, at this time, the pressure in the valve cavity 505 is released into the third chamber 406 through the second through hole 5045, thereby forming a pressure difference around the valve component 504, which is low at the top and high at the bottom. Under the action of the pressure difference, the liquid pressure pushes the valve component 504 to move upward to open the valve port 4061 of the third chamber. At this time, the second chamber 405 is connected with the second liquid outlet 407 through the third chamber 406, so that the gas-liquid mixture in the second chamber 405 is discharged from the second liquid outlet 407, so that the air in the liquid inlet pipe is pumped out by the pump to generate negative pressure, thereby sucking liquid into the pump, so that the pump is in normal working state.

[0071] Furthermore, in other embodiments, when the electromagnetic coil is powered off, the valve core assembly is at the uppermost position of the sealing shell, that is, the second through hole is in an open state. When the electromagnetic coil is powered on, the valve core assembly moves downward and blocks the second through hole, thereby closing the valve port of the third chamber. Therefore, the electromagnetic coil and the drive mechanism can be controlled to open or close at the same time.

[0072] It should be understood that the pump provided in the embodiment of the present invention has a control valve body 05 of a pilot structure. Therefore, the purpose of connecting the third chamber 406 with the second chamber 405 is achieved by opening the third chamber valve port 4061. The control valve body 05 can also be a direct-acting structure or a step-by-step direct-acting structure. For the specific structure, please refer to the prior art; in addition, the driving mode of the control valve body 02 can also be pneumatic or electric.

[0073] To sum up, the pump provided by the embodiment of the present invention can solve the problem of the gradual decrease in liquid pressure in the second chamber. In addition, it can also be used in a system constructed with a pressure sensor. When the pressure sensor detects that the working pressure of the pump body is greater than the preset pressure value, the electromagnetic coil 501 is energized to open the third chamber valve port 4061 to release the pressure, until the pressure sensor detects that the working pressure of the pump body reaches the preset normal pressure value, the electromagnetic coil 501 is de-energized to close the third chamber valve port 4061, thereby protecting the pump body and equipment, and outputting a stable liquid pressure. Therefore, the pump provided by the embodiment of the present invention can realize automatic control of the working pressure of the pump body by connecting a sensor, as well as the purpose of real-time or remote adjustment of the working pressure of the pump body.

[0074] Please continue reading Figure 7 and Figure 10 In one 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 arranged on the main body 410, the diaphragm 413 and the pump cover 412 are fixed to one side of the main body and cooperate to form the boost chamber 404, the diaphragm 413 and the main body 410 cooperate to form the first chamber 403 and the second chamber 405, the control valve body 05 is arranged on the main body 410, and the valve assembly 504 cooperates with the main body 410 to form the third chamber 406.

[0075] In order to prevent liquid from flowing back, a first one-way valve 4112 is provided that only allows liquid to flow from the first chamber 403 into the boost chamber 404, and a second one-way valve 4111 is provided that only allows liquid to flow from the boost chamber 404 into the second chamber 405, wherein the first one-way valve 4112 is cooperated and connected with the first one-way valve mounting hole 4212 on the diaphragm 413, and the second one-way valve 4111 is cooperated and connected with the second one-way valve mounting hole 4211 on the diaphragm 413.

[0076] It is understandable that the diaphragm 413 and the pump cover 412 can be fixedly connected by various means such as bonding and pressing.

[0077] In one embodiment of the present invention, the driving mechanism 06 changes the volume of the boost chamber 404 in the following manner: the driving mechanism 06 is connected to the diaphragm 413 , and the driving mechanism changes the volume of the boost chamber 404 by driving the diaphragm 413 to reciprocate.

[0078] The structure of the driving mechanism can be various. The structure of the driving mechanism of this embodiment is as follows:

[0079] Please refer to Figure 7 、 Figure 10 and Figure 12 The driving mechanism 06 includes a motor 601, a driving wheel 602, a bearing 604 and a driving connecting rod 603 arranged on the main body 04. The driving wheel 602 is arranged on the output shaft of the motor 601, the bearing 604 is installed on the driving wheel 602, the driving connecting rod 603 is sleeved on the outside of the bearing 604, and the end of the driving connecting rod 603 is connected to the side of the diaphragm 413 away from the pump cover 412. Through the eccentric rotation of the driving wheel 602, the bearing 604 drives the driving connecting rod 603 to reciprocate, thereby driving the diaphragm 413 to reciprocate.

[0080] For example, if Figure 12As shown, a waist-shaped groove is formed in the middle of the driving connecting rod 603, and the waist of the waist-shaped groove is parallel to the plane where the diaphragm 413 is located. The driving wheel 602 is located in the waist-shaped groove. During the rotation of the driving wheel 602, the side away from the rotation point is squeezed to the inner wall of one of the waists of the waist-shaped groove of the driving connecting rod 603, thereby pushing the end of the connecting rod where the waist is located to move toward the boost chamber 404.

[0081] It is worth mentioning that, in some embodiments, the pump body includes only one pressurizing chamber 404 , while in other embodiments, the pump body includes two or more pressurizing chambers 404 .

[0082] In the case where the pump body 04 includes two pressurizing chambers 404, in order to facilitate driving, a set of pump covers 412 and diaphragms 413 are respectively provided on opposite sides of the main body 410, thereby symmetrically forming pressurizing chambers 404 on opposite sides of the main body 410. Figure 7 and Figure 12 As shown, the driving mechanism 06 is disposed between the two diaphragms 413, thereby simultaneously driving the two diaphragms 413 to move in opposite directions, so that the two pressurizing chambers take turns to inhale and discharge liquid, thereby increasing the liquid flow rate.

[0083] In summary, the pumps provided by the two specific embodiments of the present invention can be used in systems (such as spray systems, filtration systems) in which the liquid pressure in the booster pump cannot be quickly released through the output end pipeline when the booster pump stops. In actual applications, there are various factors that affect the rapid drop in liquid pressure when the booster pump stops, such as the following situations: First, due to factors of the driving mechanism, for example, the driving mechanism composed of a motor, the internal motor rotor cannot stop immediately due to inertia, thereby causing the liquid pressure to drop linearly; Second, there is air in the second chamber or in the output end pipeline that cannot be removed. Since air is compressible, when the driving mechanism stops, the liquid pressure drops, and at the same time, the liquid pressure in the pipeline drops. The previously compressed air increases in volume due to the decrease in liquid pressure, and when the volume increases, the liquid pressure cannot decrease rapidly; third, the elastic deformation of the pipeline itself will also affect the speed of liquid pressure decrease; therefore, the present invention adds a control valve between the second chamber and the third chamber. When the driving mechanism stops, the valve in the control valve is immediately opened, so that the second chamber and the third chamber are immediately connected. When the liquid pressure in the third chamber is normal pressure, the liquid automatically flows from the high-pressure area to the low-pressure area. Therefore, the liquid pressure in the second chamber is quickly released to the third chamber, thereby quickly reducing the liquid pressure in the second chamber to normal pressure, thereby avoiding the problem of gradual decrease in liquid pressure.

[0084] During the process of liquid suction, when there is no liquid in the liquid inlet pipe, the air in the liquid inlet pipe must be extracted first to generate negative pressure and suck the liquid into the pump. However, in actual applications, for example, when the pump is working, due to insufficient liquid or the liquid has been sucked out, air enters the pump. Then, during the next liquid suction process of the pump, it is necessary to first discharge the gas-liquid mixture in the pump and the output end pipeline to extract the air in the liquid inlet pipe to generate negative pressure and suck the liquid into the pump. Because the gas is compressible, the pump is in an idling state, and the liquid or gas-liquid mixture in the output end pipeline cannot be discharged as quickly as possible, which greatly increases the liquid suction time. Therefore, the present invention adds a control valve between the second chamber and the third chamber. By opening the valve in the control valve, the second chamber is connected to the third chamber. Since the second liquid outlet can be a normal pressure discharge outlet, the liquid automatically flows from the high-pressure area to the low-pressure area. Therefore, the gas-liquid mixture in the second chamber is discharged from the second liquid outlet, so that the air in the liquid inlet pipe is extracted by the pump and a negative pressure is generated, thereby sucking the liquid into the pump, so that the pump is in a normal working state.

[0085] Therefore, in order to solve the above problems, according to the technical solution provided by the present invention and the above two embodiments of the invention, it can be easily associated with other types of booster pumps to achieve the purpose of quickly releasing the liquid pressure in the booster pump when the driving mechanism stops; and to discharge the air in the pump and the liquid inlet pipe as soon as possible.

[0086] The present invention also provides a liquid delivery device, such as Figure 13 As shown, Figure 13 Schematic diagram of the liquid delivery device of the present invention. The liquid delivery device comprises a device body 07 and a pump 08 according to any of the above embodiments, and the pump 08 is mounted on the device body 07.

[0087] For example, the device body 07 is a main unit of the spray system, and the pump 08 is installed on the main unit of the spray system and connected to the liquid inlet interface 71 and the liquid outlet interface 72 on the device body 07, wherein the liquid inlet interface 71 is used to connect the liquid inlet pipe (not shown in the figure), and the liquid outlet interface 72 is used to connect the spray pipeline (not shown in the figure), and a nozzle (not shown in the figure) is provided on the spray pipeline; the pump 08 obtains liquid from the liquid inlet pipe through the liquid inlet interface 71, and outputs the liquid from the liquid outlet interface 72 to the spray pipeline after pressurizing the liquid, thereby providing pressurized liquid to the nozzle to achieve the purpose of spraying; when it is necessary to stop spraying, the driving mechanism on the pump 08 is controlled to stop, and the control valve on the pump 08 is controlled to open at the same time, so that the liquid pressure at the nozzle is rapidly reduced, thereby quickly stopping the spraying and preventing the nozzle from dripping.

[0088] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0089] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A pump, characterized in that: include: A pump body, comprising a liquid inlet, a first liquid outlet, and a second liquid outlet; the pump body being provided with a first chamber, a boost chamber, a second chamber, and a third chamber, which are sequentially connected; the pump body being provided with a drive mechanism, the drive mechanism being used to change the volume of the boost chamber to draw liquid from the first chamber into the boost chamber and to transfer the liquid in the boost chamber to the second chamber; the first chamber being connected to the liquid inlet, the second chamber being connected to the first liquid outlet, and the third chamber being connected to the second liquid outlet; the third chamber including a third chamber valve port, the third chamber being connected to the second chamber by opening the third chamber valve port; The control valve body includes a fixed shell, an electromagnetic coil, a sealing shell, a valve core assembly and a valve assembly. The electromagnetic coil is used to generate electromagnetic force to drive the valve core assembly in the sealing shell to move, so that the valve assembly opens or closes the valve port of the third chamber. The control valve body is configured so that when the driving mechanism stops working, the electromagnetic coil drives the valve core assembly to move, opens the valve port of the third chamber, connects the second chamber with the second liquid outlet, and quickly releases the residual pressure in the second chamber.

2. The pump according to claim 1, wherein The valve assembly includes a valve seat and a diaphragm, wherein the valve seat and the diaphragm are fixedly connected to each other, and the valve seat is used to press the diaphragm when closing the third chamber valve port so that the diaphragm seals the third chamber valve port, and to drive the diaphragm away from the third chamber valve port when opening the third chamber valve port.

3. The pump according to claim 2, wherein The pump body includes a diaphragm accommodating groove, and the diaphragm is correspondingly accommodated in the diaphragm accommodating groove. The fixed shell is pressed against the sealing shell, so that the edge portion of the diaphragm is matched and clamped by the sealing shell and the diaphragm accommodating groove, so that the valve core assembly and the valve assembly are sealed in the pump body, and a valve cavity is formed between the sealing shell 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 according to claim 3, wherein A first through hole and a second through hole are provided on the valve seat, wherein the first through hole is used to connect the second chamber and the valve cavity; the second through hole is connected to the third chamber, and when the valve port of the third chamber needs to be opened, the second through hole is used to connect the third chamber and the valve cavity.

5. The pump according to claim 4, wherein The valve core assembly includes a valve stem and a valve core, wherein the valve core is fixed to one end of the valve stem, wherein the valve stem is used to obtain the electromagnetic force of the electromagnetic coil to move, thereby driving the valve core to move to open or close the connection between the second through hole and the valve cavity.

6. The pump according to claim 1, wherein The pump body includes a main body, a diaphragm and a one-way valve seat. The control valve body is arranged on the main body. The valve assembly, the one-way valve seat and the main body cooperate to form the second chamber. The one-way valve seat and the main body cooperate to form the first chamber. The diaphragm and the one-way valve seat cooperate to form a boosting chamber. The valve assembly and the main body cooperate to form the third chamber.

7. The pump according to claim 6, wherein The driving mechanism includes a motor, a driving wheel, a bearing and a driving connecting rod, wherein the driving wheel is arranged on the output shaft of the motor, the bearing is installed on the driving wheel, and the driving connecting rod is installed on the bearing, wherein the driving wheel is an inclined 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 inclined eccentric rotation of the driving wheel, thereby driving the diaphragm to reciprocate to change the volume of the boost chamber.

8. The pump according to claim 1, wherein The pump body includes a main body, a diaphragm and a pump cover. The diaphragm and the pump cover are fixed to one side of the main body and cooperate to form the boost chamber. The diaphragm cooperates with the main body to form the first chamber and the second chamber. The control valve body is arranged on the main body, and the valve assembly cooperates with the main body to form the third chamber.

9. The pump according to claim 8, wherein The driving mechanism includes a motor, a driving wheel, a bearing and a driving connecting rod, wherein the driving wheel is arranged on the output shaft of the motor, the bearing is installed on the driving wheel, and the driving connecting rod is sleeved outside the bearing, wherein the driving wheel is an eccentric wheel; the driving connecting rod is correspondingly connected to the diaphragm, so that the eccentric rotation of the driving wheel drives the driving connecting rod to reciprocate, thereby driving the diaphragm to reciprocate to change the volume of the boost chamber.

10. The pump according to claim 6 or 8, characterized in that The pump body includes a first one-way valve for preventing liquid backflow and a second one-way valve, wherein the first one-way valve only allows liquid to flow from the first chamber into the pressurizing chamber, and the second one-way valve only allows liquid to flow from the pressurizing chamber into the second chamber.

11. A liquid delivery device, characterized in that: The device comprises a device body and a pump according to any one of claims 1 to 10.

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