Pneumatic air bag pump

Abstract

The utility model discloses a pneumatic air bag pump which comprises a pump body, a partition body is machined in the pump body, a first cavity and a second cavity are formed in the pump body in a partition mode, the two ends of the pump body are connected with end covers respectively, a center hole for assembling a core shaft in dynamic reciprocating motion is formed in the middle of the partition body, and a ceramic coating is coated in the center hole. A flow / cut-off well, a liquid inlet channel and a liquid outlet channel are further formed in the partition body; the corrugated pipe adopts the U-shaped bending design, contact friction is reduced, the compression and expansion process is smoother, damage caused by abrasion is reduced, a liquid phase one-way flowing / stopping structure is more reliable after being optimized, an external quick discharging valve is matched, liquid phase discharging is smoother, the mandrel is provided with the shaft sleeve, abrasion is reduced, conduction efficiency is improved, and the service life is prolonged. The center hole is coated with a ceramic coating to prevent abrasion and corrosion, and leakage is avoided. The auxiliary air channel is combined with the air bag and the air bag compensator, the output pressure of 0.7 Mpa or above is achieved, the applicability is wide, and the commercial value is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to an air bag pump, especially a pneumatic air bag pump. BACKGROUND

[0002] The air bag pump is a kind of pump that uses compressed air to drive the expansion and contraction of air bag to realize liquid delivery, which mainly comprises air bag, chamber, inlet and outlet one-way valve and components connected with compressed air source etc.In the working process, compressed air is periodically filled and discharged into the chamber, causing the expansion and contraction of bellows.This reciprocating motion generates a pressure difference, causing fluid to be sucked into the pump on the suction side and discharged on the discharge side.The air bag pump is widely used in chemical metering of industrial processes, fluid delivery in semiconductor manufacturing, adhesive or paint dispensing in the automotive industry and fluid metering in water treatment plants.

[0003] The liquid phase discharge of air bag pump needs to use one-way valve, and almost all are passive one-way valves, among them, the liquid phase one-way valve with spring type is most widely used, and the valve core is reset by spring pre-tightening force, for example, the pneumatic air bag pump disclosed in publication (announcement) No.CN118757375A comprises an air bag pump and a pump head fixedly installed in the air bag pump, the pump head is fixedly connected with a liquid outlet pipe on one side, the pump head is fixedly connected with a liquid inlet pipe on the side perpendicular to the liquid outlet pipe, the pump head is fixedly connected with a first valve body at both ends, the first valve body is fixedly connected with a first valve body spring inside, the pump head is fixedly connected with a second valve body below, the second valve body is fixedly connected with a second valve body spring inside, the pump head is fixedly connected with a bellows outside the first valve body and the second valve body on both sides, the bellows is fixedly connected with a pump body insertion shaft through a bellows fixing disc away from the pump head, and the liquid flow direction is controlled by the first valve body spring and the second valve body spring inside.The valve core is reset by spring pre-tightening force to control the liquid flow direction, but the opening and closing of spring one-way valve depend on the dynamic balance of spring pre-tightening force and fluid pressure, when the system pressure fluctuates, there is a certain delay in the action of valve core, and the performance decay caused by spring fatigue after long-term use will change the opening pressure threshold of one-way valve invisibly, directly affecting the sealing performance and flow stability of valve.

[0004] In addition, the existing air bag pump also faces the following problems:

[0005] Firstly, the pressure is relatively small, usually not more than 0.45Mpa; secondly, the service life is short, due to the mechanical movement of air bag and the easy-wearing characteristics of pneumatic system, especially the wear of reciprocating shaft and the rupture of air bag, which leads to frequent air leakage and liquid leakage of pneumatic system in high cycle application, and the leakage of chemical liquid is easy to cause safety accidents in these cases. UTILITY MODEL CONTENTS

[0006] In order to solve the above technical problems, the utility model provides a kind of pneumatic wind bag pump.

[0007] In order to solve the above technical problems, the utility model adopts technical scheme: a kind of pneumatic wind bag pump, including the pump body that is internally processed with the partition body and is separated to form first cavity, second cavity, the pump body both ends are connected end cover respectively;

[0008] The central hole of the partition body middle part is formed with the core shaft of assembly dynamic reciprocating motion, the central hole is coated with ceramic coating, and the partition body is also provided with flow / cutoff well, liquid inlet channel, liquid outlet channel, the flow / cutoff well includes first flow / cutoff well and second flow / cutoff well, and each is equipped with water inlet seat, water outlet seat, first valve ball, second valve ball, the first flow / cutoff well is connected with first cavity by first liquid passage hole, and the second flow / cutoff well is connected with second cavity by second liquid passage hole;

[0009] First cavity and second cavity are provided with wind bag connected with core shaft, and the corrugation of wind bag is U-shaped bending, and wind bag is provided with wind bag compensator;

[0010] End cover includes first end cover, second end cover with same structure, and the main air duct and auxiliary air duct are formed in the inside of both.

[0011] Further, the central hole is formed in a manner through first cavity and second cavity, both opening ends of the central hole are provided with core shaft sleeve matched with the core shaft, and the maximum length of the core shaft is greater than the maximum length of the central hole.

[0012] Further, first liquid passage hole and second liquid passage hole are located on both sides of the central hole and are at the same horizontal height, the opening of first liquid passage hole faces first cavity, and the opening of second liquid passage hole faces second cavity.

[0013] Further, first flow / cutoff well and second flow / cutoff well are vertically arranged in the partition body, and the structures of first flow / cutoff well and second flow / cutoff well are same and parallel to each other, and the upper and lower openings of first flow / cutoff well and second flow / cutoff well are through and are respectively threadedly connected with upper valve cover and lower valve cover at the openings, and the inner surface of upper valve cover forms limiting column.

[0014] Further, liquid inlet channel and liquid outlet channel are transversely arranged in the partition body, and the structures of liquid inlet channel and liquid outlet channel are parallel to each other and vertically through first flow / cutoff well and second flow / cutoff well respectively, and liquid outlet channel is located directly above liquid inlet channel, the free end of liquid inlet channel corresponds to form liquid inlet, the free end of liquid outlet channel corresponds to form liquid outlet, and liquid inlet and liquid outlet are arranged on the same side.

[0015] Further, the water inlet seat is located directly above the intersection of the flow / stop well and the liquid inlet channel, the first valve ball is carried by the water inlet limiting ring body in the opening of the water inlet seat, a carrying limiting member is arranged directly above the first valve ball to block the upward movement of the first valve ball, a water delivery hole is formed in the carrying limiting member, the carrying limiting member is arranged below the first liquid passage hole and the second liquid passage hole and supports the second valve ball, the maximum size of the first liquid passage hole and the second liquid passage hole is smaller than the maximum size of the second valve ball, a water outlet seat is arranged directly above the second valve ball, and the second valve ball is blocked from upward movement by the water outlet limiting ring body in the opening of the water outlet seat.

[0016] Further, the inner end faces of the first end cover and the second end cover each form a hollow thick-walled cylinder seat extending towards one side of the partition body, the thick-walled cylinder seat is located in the bellows inner cavity of the air bag, and the hollow space formed by the thick-walled cylinder seat is provided with the air bag compensator.

[0017] Further, the two ends of the main air passage are respectively provided with an external air connection port and an internal air connection port, the external air connection port is located on the side face of the end cover, and the internal air connection port is located on the free end face of the thick-walled cylinder seat.

[0018] The two ends of the auxiliary air passage are respectively provided with an auxiliary external air port and an auxiliary internal air port, the auxiliary external air port is located on the side face of the end cover, and the auxiliary internal air port is located at the common axis of the end cover and the thick-walled cylinder seat.

[0019] Further, the air bag comprises a bellows forming a bellows inner cavity and a front end cover and a rear end ring plate arranged at the two ends of the bellows respectively, the front end cover is arranged close to one side of the partition body and connected with the mandrel, a connecting hole is formed at the center of the front end cover, and the air bag is fastened to the end cover through the rear end ring plate.

[0020] Further, the air bag compensator comprises a hollow sleeve with openings at the two ends, the rear end opening of the sleeve is plugged with a rear plug, and a piston rod reciprocally penetrates the inside and outside of the front end opening of the sleeve in the cavity of the sleeve, and the threaded end head at the front end of the piston rod is combined with the connecting hole.

[0021] The pneumatic air bag pump is optimized and innovated in the internal structure, the bending part of the bellows of the air bag adopts a U-shaped design, the contact friction is smaller than that of the traditional sharp corner structure, the compression and expansion of the bellows are more smooth, and the damage caused by abrasion is reduced in structure; the optimized liquid phase one-way flow / stop structure is more reasonable and reliable, and the liquid phase is discharged more smoothly in combination with the external quick discharge valve; the mandrel is provided with a mandrel sleeve to reduce the swing abrasion of the mandrel, strengthen the conduction efficiency, improve the service life of the mandrel, and prevent surface abrasion and cavitation corrosion problems and leakage by coating a ceramic coating on the center hole; the auxiliary air passage is provided, the air bag and the air bag compensator are combined to realize the pressure range of liquid phase output, and an output capacity of 0.7 Mpa or above is provided, the applicability is wider, and the commercial value is stronger. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The utility model discloses a structure schematic diagram.

[0023] Figure 2 The utility model discloses a structure schematic diagram of pump body Figure 1 .

[0024] Figure 3 The utility model discloses a structure schematic diagram of pump body Figure 2 .

[0025] Figure 4 The utility model discloses a structure schematic diagram of pump body Figure 3 .

[0026] Figure 4 The utility model discloses a structure schematic diagram of pump body Figure 5 .

[0027] Figure 5 The utility model discloses a structure schematic diagram of pump body Figure 7 .

[0028] Figure 8 The utility model discloses a structure schematic diagram of pump body

[0029] Figure 1 The utility model discloses a structure schematic diagram of pump body Figure 9 .

[0030] Figure 2 The utility model discloses a structure schematic diagram of pump body Figure 10 .

[0031] Figure 11 The utility model discloses a structure schematic diagram of pump body

[0032] Figure 12 The utility model discloses a structure schematic diagram of pump body

[0033] Figure 13 The utility model discloses a structure schematic diagram of pump body

[0034] Figure 14 The utility model discloses a structure schematic diagram of pump body

[0035] Figures 1-14 The utility model discloses a structure schematic diagram of pump body

[0036] The utility model discloses a structure schematic diagram of pump body

[0037] 10, pump body; 11, external thread; 12, first cavity; 13, second cavity; 14, partition body; 141, first liquid passage hole; 142, second liquid passage hole; 15, center hole; 151, ceramic coating; 16, first flow / stop well; 161, water inlet seat; 162, water inlet limiting ring body; 163, bearing limiting piece; 164, water delivery hole; 165, water outlet seat; 166, water outlet limiting ring body; 167, first valve ball; 168, second valve ball; 17, second flow / stop well; 18, liquid inlet; 181, liquid inlet channel; 19, liquid outlet; 191, liquid outlet channel; 100, upper valve cover; 101, lower valve cover; 102, limiting column;

[0038] 20, first end cover; 21, second end cover; 22, internal thread; 23, thick-walled cylinder seat; 24, external air communication port; 25, internal air communication port; 26, main air passage; 27, auxiliary external air port; 28, auxiliary internal air port; 29, auxiliary air passage; 200, sensor hole; 201, sensor;

[0039] 30, air bag; 31, front end cover; 32, bellows; 33, rear end ring plate; 34, bellows inner cavity; 35, connecting hole; 36, U-shaped bending;

[0040] 40, mandrel; 41, mandrel shaft sleeve;

[0041] 50, air bag compensator; 51, piston rod; 52, threaded end; 53, sleeve; 54, rear plug. DETAILED DESCRIPTION

[0042] The utility model will be explained in further detail below in combination with the drawings and specific embodiments.

[0043] As Figure 2 The embodiment relates to a pneumatic air bag pump, which comprises a pump body 10 internally processed with a partition body 14 and partitioned to form a first cavity 12 and a second cavity 13, as shown in the figure. Figures 2-3 As shown in the figure, external threads 11 are arranged at both ends of the pump body 10, and end covers are respectively connected to both ends of the pump body 10, wherein the end covers comprise first end covers 20 and second end covers 21 which are identical in structure, the inner rings of the first end covers 20 and the second end covers 21 are respectively provided with internal threads 22, and the first end covers 20 and the second end covers 21 are respectively threadedly connected to both ends of the pump body 10 through matching of the external threads 11 and the internal threads 22.

[0044] As Figure 3As shown, a central hole 15 is formed in the middle of the partition body 14 for assembling a dynamically reciprocating spindle 40. The central hole 15 is formed in a manner that penetrates the first cavity 12 and the second cavity 13. When the dynamic reciprocating motion of the spindle 40 is specifically a piston-like reciprocating motion, the maximum length of the spindle 40 is greater than the maximum length of the central hole 15. Therefore, it can be understood that the spindle 40 and the central hole 15 are fitted with a clearance to prevent liquid flow. In order to further enhance the sealing effect of the reciprocating motion of the spindle 40, both open ends of the central hole 15 are provided with spindle sleeves 41 that match the spindle 40. The spindle sleeves 41 also have a certain effect of preventing wear of the spindle 40. In addition, in order to solve the problems of wear and leakage of the reciprocating shaft of the traditional airbag pump, such as Figures 5-6 As shown, the central hole 15 in this embodiment is coated with a ceramic coating 151.

[0045] like Figure 5 As shown, the partition body 14 is also provided with a flow / stop well, a liquid inlet channel 181, and a liquid outlet channel 191. The flow / stop well includes a first flow / stop well 16 and a second flow / stop well 17, and each of them is equipped with a water inlet seat 161, a water outlet seat 165, a first valve ball 167, and a second valve ball 168. The first flow / stop well 16 is connected to the first cavity 12 through the first liquid passage hole 141, and the second flow / stop well 17 is connected to the second cavity 13 through the second liquid passage hole 142.

[0046] Preferably, the first liquid passage hole 141 and the second liquid passage hole 142 are located on both sides of the central hole 15 and are at the same horizontal height. It can be understood that the opening of the first liquid passage hole 141 faces the first cavity 12 and the opening of the second liquid passage hole 142 faces the second cavity 13.

[0047] Preferably, both the first flow / stop well 16 and the second flow / stop well 17 are used to provide flow and component installation space for the unidirectional liquid phase stop. The difference is that the first flow / stop well 16 is connected to the first cavity 12 during the flow process, and the second flow / stop well 17 is connected to the second cavity 13 during the flow process.

[0048] Furthermore, such as Figure 1 As shown, the first flow / stop well 16 and the second flow / stop well 17 are arranged vertically in the partition body 14. The first flow / stop well 16 and the second flow / stop well 17 have the same structure and are parallel to each other, as shown. Figure 6 , 3 As shown, both the first flow / stop well 16 and the second flow / stop well 17 have openings at the top and bottom, and each opening is threaded with an upper valve cover 100 and a lower valve cover 101. The upper valve cover 100 and the lower valve cover 101 are used to prevent leakage of the flow / stop well at the upper and lower positions, respectively. In this embodiment, the upper valve cover 100 and the lower valve cover 101 are both threaded in the flow / stop well.

[0049] As shown in Figure 1 , the liquid inlet channel 181 and the liquid outlet channel 191 are arranged in the transverse direction of the partition body 14, and the liquid inlet channel 181 and the liquid outlet channel 191 are parallel to each other and each vertically penetrates the first flow / stop well 16 and the second flow / stop well 17, and the liquid outlet channel 191 is located directly above the liquid inlet channel 181, as shown in Figure 10 , the free end of the liquid inlet channel 181 corresponds to form the liquid inlet port 18, and the free end of the liquid outlet channel 191 corresponds to form the liquid outlet port 19, and the liquid inlet port 18 and the liquid outlet port 19 are arranged on the same side, and in actual use, the liquid inlet port 18 and the liquid outlet port 19 are also equipped with external components such as quick drain valves to further enhance the performance of liquid phase circulation.

[0050] Regarding the one-way flow / stop structure of the liquid phase, as shown in Figure 3 , the water inlet seat 161 is located directly above the flow / stop well at the intersection with the liquid inlet channel 181, and it can be understood that the number of flow / stop wells is two, so the number of water inlet seats 161 is also two, and the following components are also two, which will not be repeated. The water inlet seat 161 carries the first valve ball 167 through the water inlet limiting ring body 162 in its opening. In actual use, due to the action of gravity, the first valve ball 167 blocks the opening formed by the water inlet limiting ring body 162, and only when the liquid phase pressure is applied will the first valve ball 167 be pushed upward to form a water inlet channel. The first valve ball 167 is provided directly above the carrying limiting piece 163 which blocks the upward movement of the first valve ball 167. It should be noted that the carrying limiting piece 163 can be connected in the flow / stop well by direct machining or later fastening. In order to make the first valve ball 167 be able to rise a certain space, the maximum height of the cavity formed between the water inlet seat 161 and the carrying limiting piece 163 is greater than the maximum diameter of the first valve ball 167;

[0051] On this basis, in order to let the liquid phase flow further, the carrying limiting piece 163 is provided with a water inlet hole 164 to let the liquid phase pass through, and the carrying limiting piece 163 is also implemented in a way that it is located below the first liquid passage hole 141 and the second liquid passage hole 142 and supports the second valve ball 168. That is to say, the carrying limiting piece 163 is the bottom supporting position of the second valve ball 168. Under the action of gravity, the second valve ball 168 is located on the carrying limiting piece 163 in the non-liquid passage state. Further, as shown in Figure 10As shown, the maximum size of the first liquid passage hole 141 and the second liquid passage hole 142 is smaller than the maximum size of the second valve ball 168, so as to prevent the second valve ball 168 from being accidentally separated. In view of the role of the first liquid passage hole 141 and the second liquid passage hole 142 as the liquid inlet and outlet passage, in order to ensure the smoothness of the liquid inlet and outlet, the opening of the first liquid passage hole 141 and the second liquid passage hole 142 in the embodiment is rectangular, so as to keep the second valve ball 168 in position and prevent the second valve ball 168 from completely blocking the opening by the shape mismatching part.

[0052] As shown, Figure 10 the water outlet seat 165 is arranged above the second valve ball 168, and the water outlet seat 165 blocks the upward movement of the second valve ball 168 by the water outlet limiting ring body 166 in the opening thereof. When the liquid medium flows from the liquid inlet 18 along the liquid inlet passage 181 to upwardly push the first valve ball 167, the second valve ball 168 is also impacted upward to block the opening of the water outlet limiting ring body 166 under the action of the water flow, thereby ensuring that the liquid phase can enter the first cavity 12 or the second cavity 13 in the liquid phase suction process. After the suction process ends and the discharge process is performed, the liquid phase in the first cavity 12 or the second cavity 13 impacts the second valve ball 168 through the liquid passage hole, but the impact force is not directly upward at this time, so the second valve ball 168 will not block the opening of the water outlet limiting ring body 166, so that the liquid phase can continue to move upward and then be discharged along the liquid outlet passage 191.

[0053] In addition, the embodiment also has a safety redundancy, as shown, Figure 7 the inner surface of the upper valve cover 100 forms a limiting column 102, which is used to prevent the second valve ball 168 from accidentally breaking through the water outlet limiting ring body 166 to move upward and block the passage.

[0054] In the embodiment, the first cavity 12 and the second cavity 13 are both provided with an air bag 30 connected with the mandrel 40, as shown, Figure 9 the air bag 30 includes a bellows 32 forming a bellows inner cavity 34 and a front end cover 31 and a rear end ring plate 33 arranged at both ends of the bellows 32, respectively. The bellows 32 works in a compressed / expanded state under the action of external force. In the embodiment, the bellows 32 is affected by the compressed air filled in the bellows inner cavity 34 to expand. The front end cover 31 is arranged on the side close to the partition body 14 and is connected with the mandrel 40. A connecting hole 35 is formed at the center of the front end cover 31. The air bag 30 is fastened to the end cover through the rear end ring plate 33.

[0055] As shown, Figure 7 the interiors of the first end cover 20 and the second end cover 21 both form a main air passage 26 and an auxiliary air passage 29. The inner end faces of the first end cover 20 and the second end cover 21 each form a hollow thick-walled barrel seat 23 extending to the side of the partition body 14, as shown, Figure 8As shown, the thick-walled cylinder seat 23 is located in the bellows cavity 34 of the air bag 30, and the hollow space formed by the thick-walled cylinder seat 23 is fitted with the air bag compensator 50.

[0056] Based on the above structure, as Figure 7 As shown, the two ends of the main air channel 26 are respectively connected to the outer air inlet 24 and the inner air inlet 25, the outer air inlet 24 is located on the side of the end cover, and the inner air inlet 25 is located on the free end surface of the thick-walled cylinder seat 23. Different from the traditional air bag structure and gas phase flow setting, the main air channel 26 of the embodiment is both the air inlet of the bellows cavity 34 of the air bag 30 and the air outlet of the bellows cavity 34 of the air bag 30. More different from the traditional air bag structure and gas phase flow setting is that the embodiment is provided with an auxiliary air channel 29, the two ends of the auxiliary air channel 29 are respectively connected to the auxiliary outer air inlet 27 and the auxiliary inner air inlet 28, the auxiliary outer air inlet 27 is located on the side of the end cover, and the auxiliary inner air inlet 28 is located at the common axis of the end cover and the thick-walled cylinder seat 23, and the air bag compensator 50 mentioned above is fitted in the hollow space formed by the thick-walled cylinder seat 23.

[0057] Then, combined with Figure 13 It can be clearly seen that the air bag compensator 50 is arranged at the auxiliary inner air inlet 28. It should be noted that the air bag compensator 50 does not completely block the auxiliary inner air inlet 28, and the air bag compensator 50 is powered through the auxiliary air channel 29 from the auxiliary inner air inlet 28. When the bellows 32 is filled with air and enters the inflation process, the chamber where the air bag 30 is located enters the liquid discharge stage, and at the same time, the auxiliary air channel 29 is filled with air, so that the air bag compensator 50 is displaced along the hollow space of the thick-walled cylinder seat 23 to the partition body 14, providing pressure assistance for the expansion of the bellows 32, thereby the pneumatic air bag pump of the embodiment provides a larger pressure range than the traditional air bag pump, and realizes an output capacity of 0.7Mpa and above.

[0058] In order to solve the problem that the traditional air bag 30 is easy to break, in structure as Figure 14 As shown, the bellows of the air bag 30 is bent in a U shape 36, and the U-shaped bending 36 has smaller friction with the inner wall of the pump body 10 than the traditional acute angle structure, and the compression and expansion are more smooth, which is beneficial to reduce the breakage caused by wear from the structure.

[0059] As Figure 1As shown, the wind bag compensator 50 includes a hollow sleeve 53 with open ends, the rear end of the sleeve 53 is plugged with a rear plug 54, the rear plug 54 is in frictional contact with the thick-walled cylinder seat 23, in order to ensure the service life and stability of the frictional contact, the edge of the rear plug 54 can be soft to better contact the thick-walled cylinder seat 23, on this basis, when the auxiliary air passage 29 enters the exhaust stage after pushing the rear plug 54 away by filling air, the auxiliary air passage 29 can suck the rear plug 54 back; in addition, the cavity of the sleeve 53 also reciprocally penetrates the piston rod 51 on the inside and outside of the front end opening of the sleeve 53, the piston rod 51 is combined with the connecting hole 35 through the threaded end 52 at the front end, so that the piston rod 51 can move with the wind bag 30, provide pressure compensation, play a role in pressure stabilization, reduce the mechanical stress of the bellows 32 of the wind bag 30 caused by overpressure or negative pressure, and prolong its service life.

[0060] In addition, in order to monitor the working cycle of the wind bag 30 in real time in actual use, as shown, ​ As shown, the present embodiment is equipped with a sensor 201 visible on the outer side of the first end cover 20 and the second end cover 21, the sensor 201 is actually a kind of proximity switch, which detects the position change of the wind bag in real time, so as to accurately control the liquid suction and discharge action of the pump, and ensure the timing accuracy of the working cycle; it should be noted that the sensor 201 can be equipped with a metal target inside the wind bag 30, such as an inductive bottom screw, or a metal material is used at the corresponding position, which is prior art and not unique to the present embodiment, and those skilled in the art can set it according to the actual situation, or it can be adapted without creative labor; in order to strengthen the rationality of the sensor 201 setting position, the present embodiment is provided with a sensor hole 200 for assembling the sensor 201 on the outer side of the first end cover 20 and the second end cover 21.

[0061] The present application discloses a kind of pneumatic wind bag pump, optimize innovation is carried out on internal structure, the bending part of the bellows of wind bag adopts U design, compared with traditional sharp structure, contact friction is smaller, the compression, expansion of bellows is more smooth, it is favorable to reduce the damage caused by abrasion from structure to occur;Optimized liquid phase one-way flow / stop structure setting is more reasonable and reliable, in combination with external quick exhaust valve, so that liquid phase is discharged more smoothly;Core shaft sleeve is equipped for core shaft that is easy to wear, reduce the swing abrasion of core shaft, strengthen the conduction efficiency, improve the service life of core shaft, and ceramic coating is coated in center hole, prevent surface abrasion and cavitation corrosion problem, prevent leakage;Set up auxiliary air passage, in combination with wind bag, wind bag compensator realizes the pressure range of liquid phase output, provides 0.7Mpa and above output capacity, more widely applicable, stronger commercial value.

[0062] The above embodiments are not a limitation of the utility model, and the utility model is not limited to the above examples. Changes, modifications, additions or replacements made by those skilled in the art within the technical scheme range of the utility model also belong to the protection range of the utility model.

Claims

1. A pneumatic airbag pump characterized by: The pump body (10) is internally processed with a partition body (14) and forms a first cavity (12) and a second cavity (13), and the pump body (10) is connected with end covers at both ends respectively; The partition body (14) is internally formed with a central hole (15) for assembling a dynamic reciprocating mandrel (40), the central hole (15) is coated with a ceramic coating (151), and the partition body (14) is further provided with flow / stop wells, a liquid inlet channel (181) and a liquid outlet channel (191), the flow / stop wells include a first flow / stop well (16) and a second flow / stop well (17), and each of the flow / stop wells is respectively provided with a water inlet seat (161), a water outlet seat (165), a first valve ball (167) and a second valve ball (168), the first flow / stop well (16) is communicated with the first cavity (12) through a first liquid passage (141), and the second flow / stop well (17) is communicated with the second cavity (13) through a second liquid passage (142). The first cavity (12) and the second cavity (13) are both provided with air bags (30) connected with the mandrel (40), the corrugation of the air bag (30) is U-shaped (36), and the air bag (30) is provided with an air bag compensator (50). The end covers include first end covers (20) and second end covers (21) which are the same in structure and are both internally formed with main air channels (26) and auxiliary air channels (29).

2. The pneumatic airbag pump of claim 1, wherein: The central hole (15) is formed in a manner of penetrating the first cavity (12) and the second cavity (13), both opening ends of the central hole (15) are provided with mandrel sleeves (41) matched with the mandrel (40), and the maximum length of the mandrel (40) is greater than the maximum length of the central hole (15).

3. The pneumatic airbag pump of claim 2, wherein: The first liquid passage (141) and the second liquid passage (142) are respectively located at both sides of the central hole (15) and are at the same horizontal height, the opening of the first liquid passage (141) faces the first cavity (12), and the opening of the second liquid passage (142) faces the second cavity (13).

4. The pneumatic airbag pump of claim 1, wherein: The first flow / stop well (16) and the second flow / stop well (17) are vertically arranged on the partition body (14), the first flow / stop well (16) and the second flow / stop well (17) are the same in structure and parallel to each other, the first flow / stop well (16) and the second flow / stop well (17) are both penetrated and opened upward and downward, and the openings are respectively threadedly connected with upper valve covers (100) and lower valve covers (101), and the inner surface of the upper valve cover (100) is formed with a limiting column (102).

5. The pneumatic airbag pump of claim 4, wherein: The liquid inlet channel (181) and the liquid outlet channel (191) are transversely arranged on the partition body (14), the liquid inlet channel (181) and the liquid outlet channel (191) are parallel to each other and perpendicularly penetrated with the first flow / stop well (16) and the second flow / stop well (17), the liquid outlet channel (191) is located directly above the liquid inlet channel (181), the free end of the liquid inlet channel (181) corresponds to a liquid inlet (18), the free end of the liquid outlet channel (191) corresponds to a liquid outlet (19), and the liquid inlet (18) and the liquid outlet (19) are arranged on the same side.

6. The pneumatic airbag pump of claim 1, wherein: The water inlet seat (161) is located directly above the intersection of the flow / shutoff well and the liquid inlet channel (181), the water inlet seat (161) carries the first valve ball (167) through the water inlet limiting ring body (162) in the opening thereof, the first valve ball (167) has the carrying limiting member (163) arranged directly above the first valve ball (167) for blocking the upward movement of the first valve ball (167), the carrying limiting member (163) has the water delivery hole (164) formed in the upper portion thereof, the carrying limiting member (163) is arranged below the first liquid passage hole (141) and the second liquid passage hole (142) and supports the second valve ball (168), the maximum size of the first liquid passage hole (141) and the second liquid passage hole (142) is smaller than the maximum size of the second valve ball (168), and the water outlet seat (165) is arranged directly above the second valve ball (168) and blocks the upward movement of the second valve ball (168) through the water outlet limiting ring body (166) in the opening thereof.

7. The pneumatic airbag pump of claim 1, wherein: The inner end face of the first end cover (20) and the second end cover (21) respectively forms a hollow thick-walled cylinder seat (23) extending towards the side of the partition body (14), the thick-walled cylinder seat (23) is located in the bellows inner cavity (34) of the air bag (30), and the hollow space formed by the thick-walled cylinder seat (23) is provided with the air bag compensator (50).

8. The pneumatic air bag pump according to claim 1, characterized in that: The main air passage (26) has an outer air connection port (24) and an inner air connection port (25) at two ends, the outer air connection port (24) is located on the side of the end cover, and the inner air connection port (25) is located on the free end face of the thick-walled cylinder seat (23); The auxiliary air passage (29) has an auxiliary outer air port (27) and an auxiliary inner air port (28) at two ends, the auxiliary outer air port (27) is located on the side of the end cover, and the auxiliary inner air port (28) is located at the common axis of the end cover and the thick-walled cylinder seat (23).

9. The pneumatic airbag pump of claim 1, wherein: The air bag (30) comprises a bellows (32) forming a bellows inner cavity (34) and a front end cover (31) and a rear end ring plate (33) arranged at two ends of the bellows (32), the front end cover (31) is arranged on the side close to the partition body (14) and connected with the mandrel (40), a connecting hole (35) is formed at the center of the front end cover (31), and the air bag (30) is fastened to the end cover through the rear end ring plate (33).

10. The pneumatic airbag pump of claim 7, wherein: The air bag compensator (50) comprises a hollow sleeve (53) with openings at two ends, the rear end opening of the sleeve (53) is plugged with a rear plug (54), and a piston rod (51) reciprocally penetrates the cavity of the sleeve (53) and the front end opening of the sleeve (53) on both sides. The threaded end head (52) at the front end of the piston rod (51) is combined with the connecting hole (35).

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