Pneumatic high-speed linkage metering pump

Abstract

The utility model relates to a pneumatic high-speed linkage metering pump, which comprises a metering pump main body, a rotary valve pump main body, an electromagnetic valve, a pneumatic actuating mechanism and a connecting seat, in a suction state, a fifth gas transmission port is communicated with a first gas transmission port, and a seventh gas transmission port is communicated with a third gas transmission port; the rotary valve piston controls the rotary valve element to be communicated with the material storage cavity and the feeding port, and the metering piston moves in the metering piston cavity and sucks in materials. In the discharging state, the sixth gas conveying opening is communicated with the second gas conveying opening, the metering piston moves in the metering piston cavity, the pneumatic executing mechanism is communicated with the electromagnetic valve, and the electromagnetic valve controls the eighth gas conveying opening to be communicated with the fourth gas conveying opening. And the rotary valve piston controls the rotary valve core to be communicated with the material storage cavity and the material outlet and discharge materials. According to the pneumatic high-speed linkage metering pump, material suction or discharge is more accurate, meanwhile, the structure is simpler, the size is more precise, and installation and use are more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of metering pumps, in particular to a pneumatic high-speed linkage metering pump. Background Art

[0002] Metering pumps are also called quantitative pumps or proportional pumps. Metering pumps are special volumetric pumps that can meet various strict process requirements and can adjust the flow rate steplessly to transport liquids (especially corrosive liquids). Metering pumps are a type of fluid conveying machinery, and their outstanding feature is that they can maintain a constant flow rate that is independent of the discharge pressure. Metering pumps can simultaneously complete the functions of conveying, metering and regulating, thereby simplifying the production process. Using multiple metering pumps, several media can be input into the process in accurate proportions for mixing. Due to their own prominence, metering pumps have now been widely used in various industrial fields such as petrochemicals, pharmaceuticals, and food.

[0003] Metering pumps can be divided into electric metering pumps and pneumatic metering pumps according to the control method. In the prior art, pneumatic metering pumps control the high-pressure gas to alternately enter the left air chamber or the right air chamber through the air valve chamber, so that the piston moves due to the change in the size of the left and right air chambers and drives the diaphragm (or piston) to move left and right, thereby realizing the suction or push out of the material.

[0004] In order to ensure the accuracy of material suction or discharge by metering pumps, a large number of rotary valves are currently used in the market to control the accuracy of material suction and discharge. However, the current combination of rotary valves and metering pumps requires multiple air pipes to be provided on the rotary valve and the metering pump to achieve separate control. Not only is the structure more complicated, but it is also more inconvenient during installation or use. Utility Model Content

[0005] In order to achieve the purpose of the utility model, the utility model provides a pneumatic high-speed linkage metering pump, including a metering pump body, a rotary valve pump body, a solenoid valve, a pneumatic actuator and a connecting seat, the metering pump body includes a feed port, a discharge port, a metering piston cavity, a first gas delivery port, a second gas delivery port and a material storage cavity, a metering piston is arranged in the metering piston cavity, the first gas delivery port and the second gas delivery port are both communicated with the metering piston cavity, and are respectively used to control the metering piston to reciprocate in the metering piston cavity, and the metering piston is communicated with the feed port or the discharge port through the material storage cavity;

[0006] The rotary valve pump body includes a rotary valve core, a rotary valve piston cavity, a rotary valve piston, a third gas delivery port, and a fourth gas delivery port. The rotary valve piston is connected to the rotary valve core. The third gas delivery port and the fourth gas delivery port are both connected to the rotary valve piston cavity. The rotary valve piston can be controlled to reciprocate respectively, and drive the rotary valve core to connect the material storage cavity and the feed port or the discharge port.

[0007] The solenoid valve is connected to the rotary valve pump body through the connecting seat, the pneumatic actuator is connected to the metering piston chamber and the solenoid valve respectively, the connecting seat is provided with a fifth gas delivery port, a sixth gas delivery port, a seventh gas delivery port, an eighth gas delivery port and an air inlet, the fifth gas delivery port is connected to the first gas delivery port, the sixth gas delivery port is connected to the second gas delivery port, the seventh gas delivery port is connected to the third gas delivery port, the eighth gas delivery port is connected to the fourth gas delivery port; the air inlet is always in a ventilated state;

[0008] In the suction state, the fifth gas delivery port is connected to the first gas delivery port, the seventh gas delivery port is connected to the third gas delivery port, the rotary valve piston controls the rotary valve core to connect the material storage chamber and the feed port, and the metering piston moves in the metering piston chamber to inhale the material;

[0009] In the discharge state, the sixth air supply port is connected with the second air supply port, the metering piston moves in the metering piston chamber, the pneumatic actuator is connected with the solenoid valve, the solenoid valve controls the eighth air supply port to be connected with the fourth air supply port, and the rotary valve piston controls the rotary valve core to connect the material storage chamber and the discharge port, and discharges the material.

[0010] Preferably, the metering piston divides the metering piston cavity into a first cavity and a second cavity, the first cavity is connected to the first gas delivery port, and the second cavity is connected to the second gas delivery port; the metering pump body also includes a metering piston head matched with the metering piston, and the metering piston head is connected to the feed port or the discharge port through a storage cavity.

[0011] Preferably, a reversing valve core is provided in the connecting seat, a copper sleeve is provided outside the reversing valve core, and the reversing valve core is respectively connected to the rotary valve piston, the fifth gas delivery port and the sixth gas delivery port;

[0012] In the suction state, the air inlet pipe supplies air to the fifth air supply port through the reversing valve core, the fifth air supply port is connected with the first air supply port, the seventh air supply port is connected with the third air supply port, the rotary valve piston controls the rotary valve core to connect the material storage chamber and the feed port, and the metering piston moves in the metering piston chamber to inhale the material;

[0013] In the discharge state, the air inlet pipe supplies air to the sixth air supply port through the reversing valve core, the sixth air supply port is connected with the second air supply port, the metering piston moves in the metering piston chamber, the pneumatic actuator is connected with the solenoid valve, the solenoid valve controls the eighth air supply port to be connected with the fourth air supply port, and the rotary valve piston controls the rotary valve core to connect the material storage chamber and the discharge port, and discharges the material.

[0014] Preferably, two supporting platforms are provided on the connecting seat, and the two supporting platforms are located on both sides of the connecting seat. The solenoid valve is connected to the connecting seat through one of the supporting platforms, and the seventh gas supply port and the eighth gas supply port are connected to the other supporting platform. A muffler is also provided on the connecting seat, and the muffler is connected to the reversing valve core.

[0015] Preferably, the rotary valve pump body also includes a transmission gear, a rack is provided at one end of the rotary valve piston, the rack is transmission connected to the transmission gear, the transmission gear is transmission connected to the rotary valve core, the rotary valve piston controls the transmission gear to drive the rotary valve core to rotate, and connects the storage chamber and the feed port or the discharge port.

[0016] Preferably, the rotary valve core is in a "T" shape, and an observation window is provided on the metering pump body.

[0017] Preferably, the metering pump body includes a valve seat, a fixed seat and a cylinder back seat connected in sequence, the feed port and the discharge port are both arranged on the valve seat, the piston head of the metering piston is arranged in the fixed seat, the metering piston and the metering piston cavity are arranged in the cylinder back seat, and an adjusting part is also provided at one end of the cylinder back seat.

[0018] Preferably, the metering piston divides the metering piston cavity into a first cavity and a second cavity, the pneumatic actuator includes a valve core seat and a ventilation channel arranged on the metering pump body, the valve core seat includes a matching ventilation valve core and an elastic member, the ventilation valve core portion is located in the first cavity, in the discharge state, the metering piston abuts against the ventilation valve core, so that the first cavity is connected to the solenoid valve through the ventilation channel.

[0019] Preferably, the pneumatic actuator also includes a first ventilation interface and a second ventilation interface, the first ventilation interface and the second ventilation interface are connected by an air pipe, the first ventilation interface is arranged on the metering pump body and is connected to the ventilation channel, and the second ventilation interface is arranged on the solenoid valve.

[0020] Preferably, the metering pump body is further provided with a first regulating valve and a second regulating valve, the first regulating valve is connected to the first gas delivery port, and the second regulating valve is connected to the second gas delivery port.

[0021] The beneficial effects of the utility model are as follows: the pneumatic high-speed linkage metering pump provided by the utility model can more accurately inhale or discharge materials, and at the same time, the structure is relatively simple, the volume is more precise, and the installation and use are more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other purposes, features and advantages of the present invention will become clearer through a more specific description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts in all the accompanying drawings, and the accompanying drawings are not deliberately scaled to the actual size, but the focus is on illustrating the main purpose of the present invention.

[0023] Figure 1 A schematic diagram of the specific structure of a pneumatic high-speed linkage metering pump from a first viewing angle provided by an embodiment of the utility model;

[0024] Figure 2 A schematic diagram of the specific structure of a pneumatic high-speed linkage metering pump from a second perspective is provided for an embodiment of the utility model;

[0025] Figure 3 A cross-sectional schematic diagram of a pneumatic high-speed linkage metering pump from a first viewing angle provided by an embodiment of the utility model;

[0026] Figure 4 A partial cross-sectional schematic diagram of a pneumatic actuator provided in an embodiment of the utility model;

[0027] Figure 5 A cross-sectional schematic diagram of a pneumatic high-speed linkage metering pump from a second viewing angle provided by an embodiment of the utility model;

[0028] In the figure: 1-air inlet, 11-first air delivery port, 12-second air delivery port, 13-fifth air delivery port, 14-sixth air delivery port, 15-third air delivery port, 16-fourth air delivery port, 17-eighth air delivery port, 18-seventh air delivery port, 2-first ventilation interface, 21-second ventilation interface, 22-second regulating valve, 23-first regulating valve, 24-regulating member, 25-muffler, 26-solenoid valve, 27-, 3-rotary valve pump body, 31- Metering pump body, 32-feeding port, 33-discharging port, 4-connecting seat, 41-supporting platform, 42-cylinder rear seat, 43-fixed seat, 44-valve seat, 5-metering piston, 51-metering piston chamber, 52-metering piston head, 53-rotary valve core, 6-reversing valve core, 61-rotary valve piston, 62-rotary valve piston chamber, 63-gas transmission channel, 64-rack, 65-transmission gear, 7-air exchange valve core, 71-elastic member, 72-valve core seat. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the relevant drawings.

[0030] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to another element and integrated therewith, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention pertains. The terms used in the specification herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] Please refer to Figure 1-5 The embodiment of the utility model provides a pneumatic high-speed linkage metering pump, including a metering pump body 31, a rotary valve pump body 3, a solenoid valve 26, a pneumatic actuator and a connecting seat 4. The metering pump body 31 includes a feed port 32, a discharge port 33, a metering piston cavity 51, a first gas delivery port 11, a second gas delivery port 12 and a material storage cavity. A metering piston 5 is arranged in the metering piston cavity 51. The first gas delivery port 11 and the second gas delivery port 12 are both connected to the metering piston cavity 51 and are respectively used to control the metering piston 5 to reciprocate in the metering piston cavity 51. The metering piston 5 is connected to the feed port 32 or the discharge port 33 through the material storage cavity.

[0033] The rotary valve pump body 3 includes a rotary valve core 53, a rotary valve piston chamber 62, a rotary valve piston 61, a third gas delivery port 15, and a fourth gas delivery port 16. The rotary valve piston 61 is connected to the rotary valve core 53. The third gas delivery port 15 and the fourth gas delivery port 16 are both connected to the rotary valve piston chamber 62. The rotary valve piston 61 can be controlled to reciprocate and drive the rotary valve core 53 to connect the material storage chamber and the feed port 32 or the discharge port 33.

[0034] The solenoid valve 26 is connected to the rotary valve pump body 3 through the connecting seat 4, and the pneumatic actuator is connected to the metering piston chamber 51 and the solenoid valve 26 respectively. The connecting seat 4 is provided with a fifth gas delivery port 13, a sixth gas delivery port 14, a seventh gas delivery port 18, an eighth gas delivery port 17 and an air inlet 1. The fifth gas delivery port 13 is connected to the first gas delivery port 11, the sixth gas delivery port 14 is connected to the second gas delivery port 12, the seventh gas delivery port 18 is connected to the third gas delivery port 15, and the eighth gas delivery port 17 is connected to the fourth gas delivery port 16; the air inlet 1 is always in a ventilated state;

[0035] In the suction state, the fifth gas delivery port 13 is connected to the first gas delivery port 11, the seventh gas delivery port 18 is connected to the third gas delivery port 15, the rotary valve piston 61 controls the rotary valve core 53 to connect the material storage chamber and the feed port 32, and the metering piston 5 moves in the metering piston chamber 51 to inhale the material;

[0036] In the discharge state, the sixth air supply port 14 is connected to the second air supply port 12, the metering piston 5 moves in the metering piston chamber 51, the pneumatic actuator is connected to the solenoid valve 26, the solenoid valve 26 controls the eighth air supply port 17 to be connected to the fourth air supply port 16, and the rotary valve piston 61 controls the rotary valve core 53 to connect the material storage chamber and the discharge port 33, and discharge the material.

[0037] Please refer to Figure 1-5 The pneumatic high-speed linkage metering pump provided by the utility model always keeps the air supply state at the air inlet 1. During the material inhalation process, the air inlet 1 supplies air to the fifth air delivery port 13 and delivers it to the first air delivery port 11. The first air delivery port 11 controls the metering piston 5 to move in the metering piston chamber 51 toward the adjustment member 24 (refer to Figure 1 In this direction, Figure 1 The seventh gas delivery port 18 is in a connected state with the third gas delivery port 15 (i.e., the feed port 32 and the material storage chamber are in a connected state), thereby ensuring that the metering piston 5 can achieve material suction (at this time, the sixth gas delivery port 14 is in a closed state or in an inoperative state);

[0038] In the discharge state, the air inlet 1 is still in the air supply state, and the air supply port supplies air to the sixth air delivery port 14 and then to the second air delivery port 12. The second air delivery port 12 controls the metering piston 5 to move in the metering piston chamber 51 toward the discharge port 33 (refer to Figure 1 In this direction, Figure 1 At this time, since the pneumatic actuator is connected to the metering piston chamber 51, the gas inside the metering piston chamber 51 is transported to the solenoid valve 26 through the pneumatic actuator while the metering piston 5 moves, and the solenoid valve 26 works. At this time, the solenoid valve 26 controls the eighth gas supply port 17 to be connected with the fourth gas supply port 16, thereby controlling the rotary valve piston 61 to move in the rotary valve piston chamber 62, and driving the rotary valve core 53 to rotate, thereby connecting the material storage chamber and the discharge port 33 to discharge the material.

[0039] In this embodiment, multiple gas delivery ports are connected through air pipes. In the inhalation state, the second gas delivery port 12, the fourth gas delivery port 16, the sixth gas delivery port 14 and the eighth gas delivery port 17 are in a non-ventilated state. In the exhaust state, the corresponding gas delivery ports are also in a non-ventilated state, which will not be repeated here.

[0040] The beneficial effects of the utility model are as follows: the pneumatic high-speed linkage metering pump provided by the utility model ensures that the metering pump body 31 and the rotary valve pump body 3 can achieve high-speed linkage when the metering pump is in the suction or discharge state through the setting of the pneumatic actuator. At the same time, the overall structure is more compact than the traditional metering pump, occupies less space, and is more convenient to install and use.

[0041] In a preferred embodiment, a first gas delivery channel 63 is provided between the first gas delivery port 11 and the first cavity, a second gas delivery channel 63 is provided between the second gas delivery port 12 and the second cavity, a third gas delivery channel 63 is provided between the third gas delivery port 15 and the third cavity, and a fourth gas delivery channel 63 is provided between the fourth gas delivery port 16 and the fourth cavity.

[0042] Please refer to Figure 1-3 In a preferred embodiment, the metering piston 5 divides the metering piston chamber 51 into a first chamber and a second chamber, the first chamber is connected to the first gas delivery port 11 (i.e., the first gas delivery port 11 is used to deliver gas to the first chamber (delivered through the gas delivery channel 63), thereby controlling the metering piston 5 to move inside the metering piston 5 pump), and the second chamber is connected to the second gas delivery port 12 (i.e., the second gas delivery port 12 is used to deliver gas to the second chamber, thereby controlling the metering piston 5 to move inside the metering piston 5 pump); the metering pump body 31 also includes a metering piston head 52 that is matched with the metering piston 5, and the metering piston head 52 is connected to the feed port 32 or the discharge port 33 through the storage chamber.

[0043] Please refer to Figure 5 In the preferred embodiment, a reversing valve core 6 is provided in the connection seat 4, a copper sleeve is provided outside the reversing valve core 6, and the reversing valve core 6 is respectively connected to the rotary valve piston 61, the fifth gas delivery port 13 and the sixth gas delivery port 14;

[0044] In the suction state, the air inlet pipe supplies air to the fifth air delivery port 13 through the reversing valve core 6, the fifth air delivery port 13 is connected to the first air delivery port 11, the seventh air delivery port 18 is connected to the third air delivery port 15, the rotary valve piston 61 controls the rotary valve core 53 to connect the material storage chamber and the feed port 32, and the metering piston 5 moves in the metering piston chamber 51 to inhale the material;

[0045] In the discharge state, the air inlet pipe supplies air to the sixth air supply port 14 through the reversing valve core 6, the sixth air supply port 14 is connected with the second air supply port 12, the metering piston 5 moves in the metering piston chamber 51, the pneumatic actuator is connected with the solenoid valve 26, the solenoid valve 26 controls the eighth air supply port 17 to be connected with the fourth air supply port 16, and the rotary valve piston 61 controls the rotary valve core 53 to connect the material storage chamber and the discharge port 33, and discharge the material.

[0046] Specifically, the rotary valve piston chamber 62 includes a third chamber and a fourth chamber, the third chamber is connected to the third gas port 15, and the fourth chamber is connected to the fourth gas port 16, both of which are used to control the reciprocating motion of the rotary valve piston 61 (the control method is the same as the above-mentioned metering piston 5, which will not be repeated here).

[0047] Specifically, the reversing valve core 6 is used to control the connection and disconnection between the fifth gas delivery port 13 and the sixth gas delivery port 14 (the fifth gas delivery port 13 or the sixth gas delivery port 14 is connected through the movement of the reversing valve core 6 ).

[0048] Please refer to Figure 1-2 In a further preferred embodiment, two support platforms 41 are provided on the connecting seat 4, and the two support platforms 41 are located on both sides of the connecting seat 4. The solenoid valve 26 is connected to the connecting seat 4 through one of the support platforms 41, and the seventh gas supply port 18 and the eighth gas supply port 17 are connected to the other support platform 41. A muffler 25 is also provided on the connecting seat 4, and the muffler 25 is connected to the reversing valve core 6.

[0049] In this embodiment, by providing a support platform 41 on the connecting seat 4, on the one hand, the overall structure of the metering pump can be made more compact, and on the other hand, the solenoid valve 26 can be installed or removed more conveniently, and at the same time, it is ensured that the occupied space between the various components of the metering pump will not be wasted;

[0050] The muffler 25 in this embodiment is used to eliminate the noise generated during the pneumatic control process of the metering pump. Specifically, the muffler 25 is also provided on the metering pump body 31.

[0051] Please refer to Figure 5 In a further preferred embodiment, the rotary valve pump body 3 also includes a transmission gear 65, a rack 64 is provided at one end of the rotary valve piston 61, the rack 64 is transmission-connected to the transmission gear 65, the transmission gear 65 is transmission-connected to the rotary valve core 53, the rotary valve piston 61 controls the transmission gear 65 to drive the rotary valve core 53 to rotate, and connects the material storage chamber and the feed port 32 or the discharge port 33.

[0052] Please refer to Figure 3 In a preferred embodiment, the rotary valve core 53 is in a "T" shape. The rotary valve core 53 may also be in other shapes, such as an L-shaped structure. The T-shaped structure is adopted in this embodiment mainly to ensure the precise control of feeding and discharging. An observation window is provided on the metering pump body 31. In a preferred embodiment, the rotary valve pump body 3 also includes a rotary valve sleeve, and the rotary valve core 53 is arranged in the rotary valve sleeve. The transmission gear 65 is matched and connected with the rotary valve sleeve, and can drive the rotary valve sleeve to rotate, thereby realizing the rotation of the rotary valve core 53, thereby connecting the material storage chamber and the feeding port 32 or the discharging port 33.

[0053] Please refer to Figure 3 In a further preferred embodiment, the metering pump body 31 includes a valve seat 44, a fixed seat 43 and a cylinder rear seat 42 which are connected in sequence, the feed port 32 and the discharge port 33 are both arranged on the valve seat 44, the piston head of the metering piston 5 is arranged in the fixed seat 43, the metering piston 5 and the metering piston cavity 51 are arranged in the cylinder rear seat 42, and an adjusting member 24 is also provided at one end of the cylinder rear seat 42; the adjusting member 24 at the rear end of the cylinder in this embodiment is provided with a scale for controlling and adjusting the flow rate.

[0054] Please refer to Figure 1-4In a preferred embodiment, the metering piston 5 divides the metering piston chamber 51 into a first chamber and a second chamber. The pneumatic actuator includes a valve core seat 72 and a ventilation channel arranged on the metering pump body 31. The valve core seat 72 includes a matching ventilation valve core 7 and an elastic member 71. The ventilation valve core 7 is partially located in the first chamber. In the discharge state, the metering piston 5 abuts against the ventilation valve core 7, so that the first chamber is connected to the solenoid valve 26 through the ventilation channel.

[0055] In the discharge state, the metering piston 5 moves in the metering piston chamber 51 toward the storage chamber (the air supply in the second chamber causes the metering piston 5 to move). At this time, the metering piston 5 abuts against the end of the air exchange valve core 7. At this time, the air exchange valve core 7 moves toward the elastic member 71, so that the air exchange channel and the first chamber are connected, and the gas in the first chamber is transported to the solenoid valve 26 through the air exchange channel. At this time, the solenoid valve 26 is in a working state; thereby controlling the eighth air supply port 17 to be connected to the fourth air supply port 16; thereby realizing the rotation of the rotary valve core 53, thereby realizing the switching between the feed port 32 and the discharge port 33.

[0056] Please refer to Figure 1-2 In a preferred embodiment, the pneumatic actuator further includes a first ventilation interface 2 and a second ventilation interface 21, which are connected via an air pipe, the first ventilation interface 2 is provided on the metering pump body 31 and communicates with the ventilation channel, and the second ventilation interface 21 is provided on the solenoid valve 26. Through the setting of the first ventilation interface 2 and the second ventilation interface 21, the metering pump body 31 and the rotary valve pump body 3 can be linked, thereby ensuring the precise control of the metering pump as a whole, with a higher accuracy rate.

[0057] Please refer to Figure 1-2 In a preferred embodiment, a first regulating valve 23 and a second regulating valve 22 are further provided on the metering pump body 31. The first regulating valve 23 is connected to the first gas delivery port 11, and the second regulating valve 22 is connected to the second gas delivery port 12. Specifically, the first regulating valve 23 and the second regulating valve 22 are both provided with scales, and specific adjustments can be made according to the scales to achieve control of the metering pump. Compared with the traditional single flow control, the function is more comprehensive and the applicability is stronger.

[0058] In a preferred embodiment, sealing rings are provided in the ventilation valve core 7, the reversing valve core 6, the metering pump body 31, the rotary valve pump body 3, the feed port 32 and the discharge port 33 to ensure their sealing properties.

[0059] The beneficial effects of the utility model are as follows: the utility model provides a pneumatic high-speed linkage metering pump, which can more accurately inhale or discharge materials, and has a simpler structure, a more precise volume, and is more convenient to install and use.

[0060] In this specification, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "other embodiments" or "specific example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0062] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A pneumatic high-speed linkage metering pump, characterized in that: It includes a metering pump body, a rotary valve pump body, a solenoid valve, a pneumatic actuator and a connecting seat. The metering pump body includes a feed port, a discharge port, a metering piston cavity, a first gas delivery port, a second gas delivery port and a storage cavity. A metering piston is arranged in the metering piston cavity. The first gas delivery port and the second gas delivery port are both connected to the metering piston cavity and are respectively used to control the metering piston to reciprocate in the metering piston cavity. The metering piston is connected to the feed port or the discharge port through the storage cavity. The rotary valve pump body includes a rotary valve core, a rotary valve piston cavity, a rotary valve piston, a third gas delivery port, and a fourth gas delivery port. The rotary valve piston is connected to the rotary valve core. The third gas delivery port and the fourth gas delivery port are both connected to the rotary valve piston cavity. The rotary valve piston can be controlled to reciprocate respectively, and drive the rotary valve core to connect the material storage cavity and the feed port or the discharge port. The solenoid valve is connected to the rotary valve pump body through the connecting seat, the pneumatic actuator is connected to the metering piston chamber and the solenoid valve respectively, the connecting seat is provided with a fifth gas delivery port, a sixth gas delivery port, a seventh gas delivery port, an eighth gas delivery port and an air inlet, the fifth gas delivery port is connected to the first gas delivery port, the sixth gas delivery port is connected to the second gas delivery port, the seventh gas delivery port is connected to the third gas delivery port, the eighth gas delivery port is connected to the fourth gas delivery port; the air inlet is always in a ventilated state; In the suction state, the fifth gas delivery port is connected to the first gas delivery port, the seventh gas delivery port is connected to the third gas delivery port, the rotary valve piston controls the rotary valve core to connect the material storage chamber and the feed port, and the metering piston moves in the metering piston chamber to inhale the material; In the discharge state, the sixth air supply port is connected with the second air supply port, the metering piston moves in the metering piston chamber, the pneumatic actuator is connected with the solenoid valve, the solenoid valve controls the eighth air supply port to be connected with the fourth air supply port, and the rotary valve piston controls the rotary valve core to connect the material storage chamber and the discharge port, and discharges the material.

2. The pneumatic high-speed linkage metering pump according to claim 1, characterized in that: The metering piston divides the metering piston cavity into a first cavity and a second cavity, the first cavity is connected to the first gas delivery port, and the second cavity is connected to the second gas delivery port; the metering pump body also includes a metering piston head matched with the metering piston, and the metering piston head is connected to the feed port or the discharge port through a storage cavity.

3. The pneumatic high-speed linkage metering pump according to claim 1, characterized in that: A reversing valve core is arranged in the connection seat, a copper sleeve is arranged outside the reversing valve core, and the reversing valve core is respectively connected to the rotary valve piston, the fifth gas delivery port and the sixth gas delivery port; In the suction state, the air inlet pipe supplies air to the fifth air supply port through the reversing valve core, the fifth air supply port is connected with the first air supply port, the seventh air supply port is connected with the third air supply port, the rotary valve piston controls the rotary valve core to connect the material storage chamber and the feed port, and the metering piston moves in the metering piston chamber to inhale the material; In the discharge state, the air inlet pipe supplies air to the sixth air supply port through the reversing valve core, the sixth air supply port is connected with the second air supply port, the metering piston moves in the metering piston chamber, the pneumatic actuator is connected with the solenoid valve, the solenoid valve controls the eighth air supply port to be connected with the fourth air supply port, and the rotary valve piston controls the rotary valve core to connect the material storage chamber and the discharge port, and discharges the material.

4. The pneumatic high-speed linkage metering pump according to claim 3, characterized in that: The connecting seat is provided with two supporting platforms, and the two supporting platforms are located on both sides of the connecting seat. The solenoid valve is connected to the connecting seat through one of the supporting platforms, and the seventh gas supply port and the eighth gas supply port are connected to the other supporting platform. A muffler is also provided on the connecting seat, and the muffler is connected to the reversing valve core.

5. The pneumatic high-speed linkage metering pump according to claim 1, characterized in that: The rotary valve pump body also includes a transmission gear, a rack is provided at one end of the rotary valve piston, the rack is transmission-connected to the transmission gear, the transmission gear is transmission-connected to the rotary valve core, the rotary valve piston controls the transmission gear to drive the rotary valve core to rotate, and connects the material storage chamber and the feed port or the discharge port.

6. The pneumatic high-speed linkage metering pump according to claim 1, characterized in that: The rotary valve core is in a "T" shape, and an observation window is provided on the metering pump body.

7. The pneumatic high-speed linkage metering pump according to claim 1, characterized in that: The metering pump body includes a valve seat, a fixed seat and a cylinder rear seat which are connected in sequence. The feed port and the discharge port are both arranged on the valve seat. The piston head of the metering piston is arranged in the fixed seat. The metering piston and the metering piston cavity are arranged in the cylinder rear seat. An adjusting piece is also arranged at one end of the cylinder rear seat.

8. The pneumatic high-speed linkage metering pump according to claim 7, characterized in that: The metering piston divides the metering piston cavity into a first cavity and a second cavity. The pneumatic actuator includes a valve core seat and a ventilation channel arranged on the metering pump body. The valve core seat includes a matching ventilation valve core and an elastic member. The ventilation valve core portion is located in the first cavity. In the discharge state, the metering piston abuts against the ventilation valve core, so that the first cavity is connected to the solenoid valve through the ventilation channel.

9. The pneumatic high-speed linkage metering pump according to claim 8, characterized in that: The pneumatic actuator also includes a first ventilation interface and a second ventilation interface, the first ventilation interface and the second ventilation interface are connected by an air pipe, the first ventilation interface is arranged on the metering pump body and is connected to the ventilation channel, and the second ventilation interface is arranged on the solenoid valve.

10. The pneumatic high-speed linkage metering pump according to any one of claims 1 to 9, characterized in that: The metering pump body is also provided with a first regulating valve and a second regulating valve, wherein the first regulating valve is connected to the first gas delivery port, and the second regulating valve is connected to the second gas delivery port.

Images