A bellows pump for conveying corrosive liquids

Abstract

The present invention discloses a bellows pump for conveying corrosive liquids, and relates to the technical field of bellows pumps. The bellows pump for conveying corrosive liquids comprises a pump body, a valve plate, a central axis, two bellows, a liquid extraction pipe and a liquid discharge pipe arranged on the bellows pump body, two working chambers are formed between the two bellows and the valve plate, the side wall of the liquid extraction pipe is fixedly connected with a liquid inlet pipe, the side wall of the liquid discharge pipe is provided with a liquid outlet pipe, and grooves are arranged on both sides of the valve plate, and also comprises: an installation chamber, which is opened in the valve plate; two groups of detection mechanisms, which are arranged on the side wall of the installation chamber close to the groove, and are used to detect the sealing of the two working chambers. The bellows pump for conveying corrosive liquids can detect the sealing of the left chamber or the right chamber when pumping liquid, and timely detect leakage when it occurs, so as to ensure normal operation and be safer and more reliable; it is convenient to filter and collect impurities in the corrosive liquid to ensure the production quality of the product.

Description

Technical Field

[0001] The invention relates to the technical field of bellows pumps, in particular to a bellows pump for conveying corrosive liquids. Background Art

[0002] The semiconductor industry and the electronics industry require pumps for conveying highly corrosive liquids such as acids and alkalis, such as bellows pumps. Bellows pumps are an indispensable pump equipment in the semiconductor production industry chain. They are a non-metallic pump body for conveying high-purity acid and alkali resistant liquids. They can also be used to convey other high-purity fluids. Bellows pumps use compressed air as a power source and rely on a variable volume capsule to alternately increase and decrease the working volume in the pump cylinder to convey special liquids. The pump chamber of the bellows is divided into two working chambers, each of which is divided into a gas phase working chamber and a liquid phase working chamber. After the compressed air enters the gas phase working chamber of the pump, the compressed bellows deforms and moves, and the compressed air is controlled by the reversing valve to enter the two gas phase working chambers in turn to work. The liquid is conveyed by alternately absorbing and discharging liquid in the liquid phase working chamber.

[0003] However, when the existing bellows pump for conveying corrosive liquids is in use, the central axis will reciprocate as the bellows deform and move. During long-term use, leakage may occur at the seal of the central axis and the bellows, affecting the normal operation of the bellows pump. At the same time, it is not easy to be corrected in time and is not stable and reliable enough. In addition, the central axis generates particles due to friction during the reciprocating motion, and there may be impurities in the liquid. When the product is etched with a strong corrosive liquid, the production quality of the product will be affected. Summary of the invention

[0004] The object of the present invention is to provide a bellows pump for conveying corrosive liquids to solve the problems mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bellows pump for conveying corrosive liquids, comprising a pump body arranged on a bellows pump body, a valve plate being arranged in the center of the pump body, and the pump body being divided into a left chamber and a right chamber by the valve plate, and bellows being respectively installed in the left chamber and the right chamber; a central axis being arranged in the center of the valve plate between the two groups of bellows, and the central axis being movable left and right along the valve plate; the bellows in the left chamber or the right chamber being inflated by air intake to squeeze the central axis to move to the opposite side and squeeze the bellows on the opposite side; a liquid suction pipe and a liquid discharge pipe being arranged between the left chamber or the right chamber, and sealing balls being arranged at both ends of the liquid suction pipe and the liquid discharge pipe, a liquid inlet pipe being fixedly connected to the side wall of the liquid suction pipe, and the other end of the liquid inlet pipe being arranged through the side wall of the pump body, a liquid outlet pipe being arranged on the side wall of the liquid discharge pipe, and grooves being arranged on both sides of the valve plate, and further comprising:

[0006] A mounting cavity is provided in the valve plate;

[0007] Two sets of detection mechanisms are arranged on the side wall of the installation cavity close to the groove, and are used to detect the sealing of the two working cavities;

[0008] The testing agencies in each group include:

[0009] A through hole, formed on a side wall of the groove and extending through the mounting cavity;

[0010] A guide sleeve is fixedly inserted in the through hole, and a piston is slidably connected in the guide sleeve;

[0011] A first reset mechanism is disposed in the mounting cavity, and a movable plate is connected to the first reset mechanism, and the first reset mechanism is used to guide and reset the movement of the movable plate, and the piston is fixed to the side wall of the movable plate through a connecting rod;

[0012] A collecting tank is arranged below the central axis and fixed to the side wall of the mounting cavity, wherein a liquid level sensor is arranged in the collecting tank;

[0013] A collecting pipe, fixedly inserted at the bottom of the pump body and connected to the bottom of the collecting tank through a solenoid valve;

[0014] An opening and closing mechanism, arranged on the side wall of the liquid inlet pipe, for opening and closing the liquid inlet pipe;

[0015] The detection component is arranged in the installation cavity and is used for detecting the movement of the movable plate.

[0016] Preferably, the detection component comprises:

[0017] A first moving mechanism is disposed in the installation cavity, and a first moving block is connected to the first moving mechanism, and is used to lift and lower the first moving block, and a proximity switch is fixedly connected to the bottom of the first moving block;

[0018] A support plate, fixed to a side wall of the installation cavity;

[0019] The rotating plate is rotated above the supporting plate through the rotating pin, and the top of the rotating plate is fixedly connected with a sensing block so that the sensing block can be located directly below the proximity switch;

[0020] A sliding groove is provided on the top of the rotating plate and is arranged through the rotating plate;

[0021] The first push rod is inserted into the sliding groove and fixed to the top of the moving plate.

[0022] Preferably, the first moving mechanism comprises:

[0023] A conical block, fixed above the first moving block;

[0024] A connecting frame, fixed to the side wall of the central axis;

[0025] A one-way rotating mechanism is arranged below the connecting frame, and a rotating block is connected to the one-way rotating mechanism so that the rotating block can slide on the side wall of the conical block;

[0026] The second reset mechanism is arranged on the side wall of the installation cavity, and the first moving block is connected to the second reset mechanism.

[0027] Preferably, it also includes:

[0028] A filtering mechanism, arranged at the outlet end of the liquid outlet pipe, for filtering and collecting impurities in the liquid;

[0029] The filtering mechanism comprises:

[0030] A filter box is fixed to the outlet end of the liquid outlet pipe and is open at the bottom, and the filter box is connected to the outside through a discharge pipe;

[0031] A filter screen is disposed in the filter box and fixed to the inlet end of the discharge pipe;

[0032] A second moving mechanism is disposed on the top of the filter box, and a squeezing plate is connected to the second moving mechanism, and is used to lift and move the squeezing plate so that the squeezing plate can slide in the filter box and on the surface of the filter screen;

[0033] A first sealing plate, inserted into the top of the filter box and fixed to the top of the extrusion plate;

[0034] A third moving mechanism is arranged on the side wall of the filter box, and the third moving mechanism is connected to the second sealing plate so that the second sealing plate can slide in the filter box;

[0035] The collecting box is arranged below the filter box and inserted into the side wall of the pump body.

[0036] Preferably, the opening and closing mechanism comprises:

[0037] A fixed cover, fixedly inserted on the side wall of the liquid inlet pipe and connected to the liquid inlet pipe;

[0038] The fourth moving mechanism is arranged on the side wall of the fixed cover, and the third sealing plate is connected to the fourth moving mechanism for lifting and lowering the third sealing plate. The third sealing plate is inserted in the fixed cover and a round hole is opened on the side wall.

[0039] Preferably, the first reset mechanism comprises:

[0040] Two first T-shaped guide rods are fixed to the side walls of the installation cavity, and the movable plate is sleeved on the side walls of the first T-shaped guide rods;

[0041] Two first springs are sleeved on the side walls of the two first T-shaped guide rods, and two ends of the first springs are respectively fixed to the mounting cavity and the side walls of the moving plate.

[0042] Preferably, the second reset mechanism comprises:

[0043] A fixed plate, disposed above the first moving block and fixed to a side wall of the mounting cavity;

[0044] Two second T-shaped guide rods are fixed above the first moving block and penetrate the top of the fixed plate;

[0045] Two second springs are sleeved on the side walls of the two second T-shaped guide rods, and two ends of the second springs are respectively fixed to the top of the fixing plate and the top of the second T-shaped guide rods.

[0046] Preferably, the second moving mechanism comprises:

[0047] Two moving rods are fixed above the extrusion plate, and the upper ends of the moving rods penetrate the top of the filter box and are fixed to the side wall of the first sealing plate through a first connecting block;

[0048] The electromagnet is fixed above the filter box, and an iron block is fixedly connected to the bottom of the first connecting block opposite to the electromagnet;

[0049] Two third springs are sleeved on the side walls of the two moving rods, and two ends of the third springs are respectively fixed to the top of the filter box and the bottom of the first connecting block.

[0050] Preferably, the third moving mechanism comprises:

[0051] Two third T-shaped guide rods fixed to the side walls of the filter box;

[0052] A second moving block is sleeved on the side walls of the two third T-shaped guide rods, and the second moving block is fixed to the top of the second sealing plate, and the side wall of the second moving block is fixedly connected with a second push rod;

[0053] Two fourth springs are sleeved on the side walls of the two third T-shaped guide rods, and two ends of the fourth springs are respectively fixed to the side walls of the second moving block and the ends of the third T-shaped guide rods;

[0054] The first inclined plate is fixed to the side wall of the first sealing plate through a first L-shaped plate, so that the first inclined plate can slide on the end of the second push rod.

[0055] Preferably, the fourth moving mechanism comprises:

[0056] Two second connecting blocks are fixed on two sides of the fixed cover;

[0057] Two fourth T-shaped guide rods are inserted on the tops of the two second connection blocks, and the upper ends of the two fourth T-shaped guide rods are fixed to the side walls of the third sealing plate through the two third connection blocks;

[0058] Two fifth springs are sleeved on the side walls of the two fourth T-shaped guide rods, and two ends of the fifth springs are respectively fixed to the top of the second connecting block and the bottom of the third connecting block;

[0059] A mounting plate is fixed to the side wall of the central axis through a second L-shaped plate, and two second inclined plates are fixedly connected to both sides of the mounting plate;

[0060] The third push rod is fixed to the top of the third sealing plate so that the upper end of the third push rod can slide on the bottom of the second inclined plate.

[0061] Preferably, the one-way rotation mechanism comprises:

[0062] A fixed block is fixed below the connecting frame, and the rotating block rotates on the side wall of the fixed block through a rotating shaft;

[0063] A gear, fixedly sleeved on the side wall of the rotating shaft;

[0064] The reset assembly is arranged on the side wall of the fixed block, and the reset mechanism is connected with a rack, and the rack is meshed with the gear.

[0065] Preferably, the reset component comprises:

[0066] Two supporting blocks are fixed to the side walls of the fixing block, and two guide rods are fixedly connected to the opposite side walls of the two fixing blocks;

[0067] Two sliding blocks are sleeved on the side walls of the two guide rods and fixed to the side walls of the rack;

[0068] Two sixth springs are sleeved on the side walls of the two guide rods, and two ends of the sixth springs are respectively fixed to the top of the sliding block and the bottom of the upper supporting block.

[0069] Compared with the prior art, the present invention has the following beneficial effects:

[0070] The bellows pump for conveying corrosive liquid is provided with a detection mechanism, etc., so that when the bellows moves in a direction away from the valve plate during use, the central axis is driven to move synchronously, and at the same time, the mounting plate is driven to move via the second L-shaped plate, and the second inclined plate is driven to move synchronously, and the top of the third push rod can slide along the second inclined plate to the bottom of the mounting plate, thereby pushing the third sealing plate to move downward along the fixed cover, and at the same time, the fifth spring is compressed so that the circular hole is offset from the liquid inlet pipe, and at this time, the third sealing plate can be used to block and seal the liquid inlet pipe, and at this time, the liquid extraction operation will not be performed through the liquid inlet pipe and the liquid extraction pipe, so that Negative pressure is generated in the left chamber or the right chamber. Under the action of pressure, the piston moves toward the direction close to the left chamber or the right chamber, and drives the moving plate to move synchronously through the connecting rod. At the same time, the first spring is compressed. When the moving plate moves, it drives the first push rod to slide in the sliding groove, thereby driving the rotating plate to rotate counterclockwise along the rotating pin. At this time, the sensing block is moved away from the bottom of the proximity switch. Moreover, when the central axis moves, it drives the connecting frame to move synchronously, and drives the rotating block to move toward the fixed plate through the one-way rotating mechanism. At this time, when the rotating block abuts against the side wall of the conical block, the rack will contact the support below. The top of the block is against each other, so that the rotating block cannot rotate, thereby pushing the conical block and the first moving block to move downward. At the same time, the second spring is compressed and drives the proximity switch to move downward synchronously. At this time, the proximity switch cannot sense the sensing block, indicating that the sealing of the left chamber or the right chamber is good. When the wind bag and the central axis continue to move, the second inclined plate can pass over the top of the third push rod. At this time, the third sealing plate can move upward under the action of the fifth spring, so that the circular hole is aligned with the liquid inlet pipe. At this time, the liquid can enter the left chamber or the right chamber through the liquid inlet pipe and the liquid extraction pipe. If there is a problem with the sealing of the left chamber or the right chamber, No negative pressure will be generated in the left chamber or the right chamber. At this time, the movable plate will not move and the rotating plate will not rotate. At this time, the sensing block will be directly below the proximity switch. When the proximity switch moves downward, it can be detected. Moreover, when there is a problem with the seal between the center axis and the valve plate, the liquid will leak into the collection tank for collection and be detected by the liquid level sensor. If the liquid level sensor does not detect the presence of liquid in the collection tank, it indicates that a leak has occurred at the wind bag. Therefore, when pumping liquid, the sealing of the left chamber or the right chamber can be detected, and leakage can be discovered in time, ensuring normal operation while being safer and more reliable.

[0071] The bellows pump for conveying corrosive liquid is provided with a filtering mechanism, etc., so that when the bellows moves toward the direction close to the groove, the liquid temporarily stored in the left chamber or the right chamber can be squeezed, and enters the second sealing plate through the drainage pipe and the liquid outlet pipe, and is filtered under the action of the filter screen, and impurities are filtered in the second sealing plate, and the filtered liquid flows out through the discharge pipe for use, thereby ensuring the quality of subsequent products. Moreover, when it is necessary to clean the filter screen and collect impurities, the electromagnet can be energized, and the electromagnet can attract the iron block after being energized, so that the first connecting block moves downward, and at the same time, the third spring is compressed, and drives the squeezing plate and the first sealing plate to move downward through the moving rod, and the outlet of the liquid outlet pipe can be temporarily blocked and sealed through the first sealing plate, and at the same time, the squeezing plate can scrape and clean the impurities on the surface of the filter screen, and can squeeze the impurities and the top of the second sealing plate, and the squeezed liquid can pass through When the end of the second push rod is disengaged from the first inclined plate, the second sealing plate can move and reset under the action of the fourth spring and seal the bottom of the filter box. Finally, the collection box can be pulled out of the pump body for cleaning, thereby facilitating the filtering and collection of impurities in the corrosive liquid and ensuring the production quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0073] Figure 2 It is a partial cross-sectional structural schematic diagram of the pump body in the present invention;

[0074] Figure 3 It is a partial cross-sectional structural schematic diagram of the pump body and the fixed cover in the present invention;

[0075] Figure 4 is a structural schematic diagram of the second moving mechanism in the present invention;

[0076] Figure 5 It is a partial cross-sectional structural schematic diagram of the filter box in the present invention;

[0077] Figure 6 It is a schematic diagram of the position of the detection mechanism in the present invention;

[0078] Figure 7It is a partial cross-sectional structural schematic diagram of the valve plate in the present invention;

[0079] Figure 8 for Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0080] Fig. 9 for Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0081] Fig.10 for Figure 5 Schematic diagram of the enlarged structure at C in the middle;

[0082] Fig.11 for Figure 6 Schematic diagram of the enlarged structure at D in the middle;

[0083] Fig.12 for Figure 7 Schematic diagram of the enlarged structure at E in the middle;

[0084] Fig.13 for Fig.11 The enlarged structural diagram at F in the middle;

[0085] Fig.14 for Fig.12 Schematic diagram of the enlarged structure at G in the middle.

[0086] In the figure: 101, pump body; 102, air bag; 103, central axis; 104, valve plate; 105, groove; 106, liquid extraction pipe; 107, liquid discharge pipe; 108, sealing ball; 109, liquid inlet pipe; 110, liquid outlet pipe; 201, first moving block; 202, proximity switch; 203, support plate; 204, rotating pin; 205, sensing block; 206, sliding groove; 207, first push rod; 208, rotating plate; 301, tapered block; 30 2, connecting frame; 303, rotating block; 401, filter box; 402, discharge pipe; 403, filter screen; 404, extrusion plate; 405, first sealing plate; 406, collecting box; 407, second sealing plate; 501, moving rod; 502, first connecting block; 503, third spring; 504, iron block; 505, electromagnet; 601, second moving block; 602, second push rod; 603, first L-shaped plate; 604, first inclined plate; 605, first Three T-shaped guide rods; 606, fourth spring; 701, fixed cover; 702, third sealing plate; 703, round hole; 801, third connecting block; 802, fourth T-shaped guide rod; 803, second connecting block; 804, fifth spring; 805, third push rod; 806, second L-shaped plate; 807, mounting plate; 808, second inclined plate; 901, rotating shaft; 902, gear; 903, support block; 904, guide rod; 905, slider; 906, gear strip; 907, sixth spring; 908, fixed block; 1001, fixed plate; 1002, second T-shaped guide rod; 1003, second spring; 11, mounting cavity; 1201, through hole; 1202, piston; 1203, connecting rod; 1204, moving plate; 1205, collecting tube; 1206, guide sleeve; 1207, collecting tank; 1208, liquid level sensor; 1209, solenoid valve; 1301, first T-shaped guide rod; 1302, first spring. DETAILED DESCRIPTION

[0087] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0088] See also Figure 1-Figure 14The present invention provides a bellows pump for conveying corrosive liquids, comprising a pump body 101 arranged on a bellows pump body, a valve plate 104 arranged at the center of the pump body 101, and the pump body 101 is divided into a left chamber and a right chamber by the valve plate 104, and bellows 102 are respectively installed in the left chamber and the right chamber; a central axis 103 is arranged at the center of the valve plate 104 between two groups of bellows 102, and the central axis 103 can move left and right along the valve plate 104; the bellows 102 in the left chamber or the right chamber are inflated by air intake to squeeze the central axis 103 to move to the opposite side and squeeze the bellows 102 ... left and right chambers. pressurize the opposite side wind bag 102; a suction pipe 106 and a discharge pipe 107 are arranged between the left chamber or the right chamber, and sealing balls 108 are arranged at both ends of the suction pipe 106 and the discharge pipe 107, the side wall of the suction pipe 106 is fixedly connected with a liquid inlet pipe 109, and the other end of the liquid inlet pipe 109 passes through the side wall of the pump body 101, the side wall of the discharge pipe 107 is provided with a liquid outlet pipe 110, and grooves 105 are arranged on both sides of the valve plate 104, and the various components of the wind bag pump are well-known technologies in the present technology, and its structure and principle are not repeated here.

[0089] In this embodiment, the bellows pump for conveying corrosive liquid further comprises:

[0090] The mounting cavity 11 is provided in the valve plate 104;

[0091] Two sets of detection mechanisms are arranged on the side wall of the installation cavity 11 close to the groove 105, and are used to detect the sealing of the two working cavities. The two sets of detection mechanisms detect the left chamber and the right chamber respectively, and when the wind bag 102 moves, one of the left chamber and the right chamber is detected by one of the detection mechanisms.

[0092] The testing agencies in each group include:

[0093] A through hole 1201 is formed on the side wall of the groove 105 and penetrates into the installation cavity 11;

[0094] The guide sleeve 1206 is fixedly inserted in the through hole 1201, and the piston 1202 is slidably connected in the guide sleeve 1206;

[0095] A first reset mechanism is disposed in the installation cavity 11, and a moving plate 1204 is connected to the first reset mechanism. The first reset mechanism is used to guide and reset the movement of the moving plate 1204. The piston 1202 is fixed to the side wall of the moving plate 1204 through a connecting rod 1203;

[0096] The collecting tank 1207 is disposed below the central axis 103 and fixed to the side wall of the mounting cavity 11. A liquid level sensor 1208 is disposed in the collecting tank 1207;

[0097] The collecting pipe 1205 is fixedly inserted at the bottom of the pump body 101 and communicates with the bottom of the collecting tank 1207 through the solenoid valve 1209;

[0098] An opening and closing mechanism is arranged on the side wall of the liquid inlet pipe 109 and is used to open and close the liquid inlet pipe 109;

[0099] The detection component is arranged in the installation cavity 11, and is used to detect the movement of the movable plate 1204. When pumping liquid, it can detect the sealing of the left chamber or the right chamber, and discover leakage in time to ensure normal operation while being safer and more reliable; it is convenient to filter and collect impurities in the corrosive liquid to ensure the production quality of the product.

[0100] like Figure 2 , Figure 3 , Figure 6 , Figure 7 , Fig.11 and Fig.12 As shown, the detection components include:

[0101] The first moving mechanism is arranged in the installation cavity 11, and the first moving mechanism is connected with a first moving block 201, which is used to lift and lower the first moving block 201. The bottom of the first moving block 201 is fixedly connected with a proximity switch 202, and the proximity switch 202 is electrically connected to an external alarm;

[0102] A support plate 203, fixed to the side wall of the installation cavity 11;

[0103] The rotating plate 208 is rotated above the supporting plate 203 through the rotating pin 204, and the top of the rotating plate 208 is fixedly connected with the sensing block 205, so that the sensing block 205 can be located directly below the proximity switch 202;

[0104] The sliding groove 206 is formed on the top of the rotating plate 208 and is arranged through the rotating plate 208;

[0105] The first push rod 207 is inserted in the sliding groove 206 and fixed to the top of the movable plate 1204. When the wind bag 102 moves in the direction away from the valve plate 104, it drives the central axis 103 to move synchronously. At the same time, the opening and closing mechanism is closed. At this time, the liquid pumping operation will not be performed through the liquid inlet pipe 109 and the liquid pumping pipe 106, which can cause negative pressure to be generated in the left chamber or the right chamber. Under the action of pressure, the piston 1202 moves in the direction close to the left chamber or the right chamber, and drives the movable plate 1204 to move synchronously through the connecting rod 1203. When the movable plate 1204 moves, it drives the first push rod 207 to slide in the sliding groove 206, thereby pushing the rotating plate 208 to rotate counterclockwise along the rotating pin 204. At this time, the sensing block 205 is moved away from the bottom of the proximity switch 202, and when the central axis 103 moves, the proximity switch 202 is driven to move downward through the first moving mechanism.

[0106] like Fig.11 and Fig.12 As shown, the first moving mechanism includes:

[0107] The conical block 301 is fixed above the first moving block 201;

[0108] A connecting frame 302 is fixed to the side wall of the central axis 103;

[0109] The one-way rotating mechanism is disposed below the connecting frame 302, and the rotating block 303 is connected to the one-way rotating mechanism so that the rotating block 303 can slide on the side wall of the conical block 301;

[0110] The second reset mechanism is arranged on the side wall of the installation cavity 11, and the first movable block 201 is connected to the second reset mechanism. When the central axis 103 moves, it drives the connecting frame 302 to move synchronously, and drives the rotating block 303 to move toward the direction close to the fixed plate 1001 through the one-way rotation mechanism. At this time, when the rotating block 303 abuts against the side wall of the conical block 301, the rotating block 303 cannot rotate, thereby pushing the conical block 301 and the first movable block 201 to move downward, and driving the proximity switch 202 to move downward synchronously.

[0111] like Figure 4 , Figure 5 and Figure 8 As shown, in this embodiment, the bellows pump for conveying corrosive liquid further comprises:

[0112] A filtering mechanism, disposed at the outlet end of the liquid outlet pipe 110, for filtering and collecting impurities in the liquid;

[0113] The filtering mechanism includes:

[0114] The filter box 401 is fixed to the outlet end of the liquid outlet pipe 110 and is open at the bottom, and the filter box 401 is connected to the outside through the discharge pipe 402;

[0115] The filter screen 403 is disposed in the filter box 401 and fixed to the inlet end of the discharge pipe 402;

[0116] The second moving mechanism is disposed on the top of the filter box 401, and the second moving mechanism is connected to a squeezing plate 404, which is used to lift and move the squeezing plate 404 so that the squeezing plate 404 can slide inside the filter box 401 and on the surface of the filter screen 403;

[0117] The first sealing plate 405 is inserted on the top of the filter box 401 and fixed to the top of the extrusion plate 404;

[0118] The third moving mechanism is disposed on the side wall of the filter box 401, and the second sealing plate 407 is connected to the third moving mechanism so that the second sealing plate 407 can slide in the filter box 401;

[0119] The collecting box 406 is arranged below the filter box 401 and inserted into the side wall of the pump body 101. When the wind bag 102 moves toward the direction close to the groove 105, it can squeeze the liquid temporarily stored in the left chamber or the right chamber, and enter the second sealing plate 407 through the discharge pipe 107 and the outlet pipe 110. Under the action of the filter net 403, the impurities are filtered out in the second sealing plate 407, and the filtered liquid flows out through the discharge pipe 402 for use, thereby ensuring the quality of subsequent products.

[0120] like Figure 7 and Fig. 9 As shown, the opening and closing mechanism includes:

[0121] A fixed cover 701 is fixedly inserted into the side wall of the liquid inlet pipe 109 and communicated with the liquid inlet pipe 109;

[0122] The fourth moving mechanism is arranged on the side wall of the fixed cover 701, and the third sealing plate 702 is connected to the fourth moving mechanism for lifting and lowering the third sealing plate 702. The third sealing plate 702 is inserted into the fixed cover 701 and a circular hole 703 is opened on the side wall. When the central axis 103 moves, the third sealing plate 702 is driven by the fourth moving mechanism to move downward along the fixed cover 701, so that the circular hole 703 is staggered with the liquid inlet pipe 109. At this time, the opening and closing mechanism is closed.

[0123] like Fig.12 As shown, the first reset mechanism includes:

[0124] Two first T-shaped guide rods 1301 are fixed to the side walls of the installation cavity 11, and the moving plate 1204 is sleeved on the side walls of the first T-shaped guide rods 1301;

[0125] The two first springs 1302 are sleeved on the side walls of the two first T-shaped guide rods 1301 , and the two ends of the first springs 1302 are respectively fixed to the mounting cavity 11 and the side walls of the moving plate 1204 , so as to guide and reset the movement of the moving plate 1204 .

[0126] like Fig.12 and Fig.14 As shown, the second reset mechanism includes:

[0127] A fixed plate 1001 is disposed above the first moving block 201 and fixed to a side wall of the installation cavity 11;

[0128] Two second T-shaped guide rods 1002 are fixed above the first moving block 201 and penetrate the top of the fixed plate 1001;

[0129] The two second springs 1003 are sleeved on the side walls of the two second T-shaped guide rods 1002 , and the two ends of the second springs 1003 are respectively fixed to the top of the fixed plate 1001 and the top of the second T-shaped guide rod 1002 , so as to guide and reset the movement of the first moving block 201 .

[0130] like Figure 4 As shown, the second moving mechanism includes:

[0131] Two moving rods 501 are fixed above the extrusion plate 404, and the upper ends of the moving rods 501 pass through the top of the filter box 401 and are fixed to the side wall of the first sealing plate 405 through the first connecting block 502;

[0132] The electromagnet 505 is fixed above the filter box 401, and the bottom of the first connecting block 502 opposite to the electromagnet 505 is fixedly connected with an iron block 504;

[0133] Two third springs 503 are sleeved on the side walls of the two moving rods 501, and the two ends of the third springs 503 are respectively fixed to the top of the filter box 401 and the bottom of the first connecting block 502. When the electromagnet 505 is energized, the electromagnet 505 attracts the iron block 504, thereby causing the first connecting block 502 to move downward. At the same time, the third spring 503 is compressed and drives the extrusion plate 404 and the first sealing plate 405 to move downward through the moving rod 501.

[0134] As shown Figure 5 and Fig.10 As shown, the third moving mechanism includes:

[0135] Two third T-shaped guide rods 605 are fixed to the side walls of the filter box 401;

[0136] The second moving block 601 is sleeved on the side walls of the two third T-shaped guide rods 605, and the second moving block 601 is fixed to the top of the second sealing plate 407, and the side wall of the second moving block 601 is fixedly connected with the second push rod 602;

[0137] Two fourth springs 606 are sleeved on the side walls of the two third T-shaped guide rods 605, and two ends of the fourth springs 606 are respectively fixed to the side walls of the second moving block 601 and the ends of the third T-shaped guide rods 605;

[0138] The first inclined plate 604 is fixed to the side wall of the first sealing plate 405 by the first L-shaped plate 603, so that the first inclined plate 604 can slide on the end of the second push rod 602. When the first inclined plate 604 abuts against the end of the second push rod 602, the second push rod 602 can slide along the first inclined plate 604 to the side wall of the first L-shaped plate 603, thereby pushing the second sealing plate 407 out of the filter box 401. At the same time, the second moving block 601 slides on the side wall of the third T-shaped guide rod 605, and the fourth spring 606 is compressed. At this time, the bottom of the filter box 401 is opened.

[0139] like Fig. 9 As shown, the fourth moving mechanism includes:

[0140] Two second connecting blocks 803 are fixed on two sides of the fixed cover 701;

[0141] Two fourth T-shaped guide rods 802 are inserted on the top of the two second connection blocks 803, and the upper ends of the two fourth T-shaped guide rods 802 are fixed to the side walls of the third sealing plate 702 through the two third connection blocks 801;

[0142] Two fifth springs 804 are sleeved on the side walls of the two fourth T-shaped guide rods 802, and two ends of the fifth springs 804 are respectively fixed to the top of the second connecting block 803 and the bottom of the third connecting block 801;

[0143] The mounting plate 807 is fixed to the side wall of the central axis 103 through the second L-shaped plate 806, and two second inclined plates 808 are fixedly connected to both sides of the mounting plate 807;

[0144] The third push rod 805 is fixed on the top of the third sealing plate 702, so that the upper end of the third push rod 805 can slide on the bottom of the second inclined plate 808. When the central axis 103 moves, it drives the second inclined plate 808 to move synchronously. The top of the third push rod 805 can slide along the second inclined plate 808 to the bottom of the mounting plate 807, thereby pushing the third sealing plate 702 to move downward along the fixed cover 701. At the same time, the fifth spring 804 is compressed.

[0145] like Fig.13 As shown, the one-way rotation mechanism includes:

[0146] The fixed block 908 is fixed below the connecting frame 302, and the rotating block 303 rotates on the side wall of the fixed block 908 through the rotating shaft 901;

[0147] The gear 902 is fixedly sleeved on the side wall of the rotating shaft 901;

[0148] The reset assembly is arranged on the side wall of the fixed block 908, and the reset mechanism is connected with a rack 906, which is meshed with the gear 902. When the air bag 102 moves away from the valve plate 104, when the central shaft 103 moves, the connecting frame 302 is driven to move synchronously, and the rotating block 303 is driven to move toward the fixed plate 1001 through the one-way rotation mechanism. At this time, when the rotating block 303 abuts against the side wall of the conical block 301, the rack 906 will engage with the support block 903 below. The top of the rotating block 303 is abutted against, so that the rotating block 303 cannot rotate, thereby pushing the conical block 301 and the first moving block 201 to move downward. When the central axis 103 moves and resets, when the rotating block 303 abuts against the side wall of the conical block 301, it can push the rotating block 303 to rotate along the rotating shaft 901, and at the same time, drive the gear 902 to rotate, and the rack 906 moves upward. At this time, the first moving block 201 and the proximity switch 202 will not be pushed to move downward, that is, the sensing block 205 will not be detected to alarm.

[0149] like Fig.13 As shown, the reset component includes:

[0150] Two support blocks 903 are fixed to the side walls of the fixed block 908, and two guide rods 904 are fixedly connected to the opposite side walls of the two fixed blocks 908;

[0151] Two sliders 905 are sleeved on the side walls of the two guide rods 904 and fixed to the side walls of the rack 906;

[0152] Two sixth springs 907 are sleeved on the side walls of the two guide rods 904 , and the two ends of the sixth springs 907 are respectively fixed to the top of the slider 905 and the bottom of the upper support block 903 , so as to guide and reset the movement of the rack 906 .

[0153] Working principle: When in use, when the air bag 102 moves in the direction away from the valve plate 104, it drives the central axis 103 to move synchronously. At the same time, the second L-shaped plate 806 drives the mounting plate 807 to move, and drives the second inclined plate 808 to move synchronously. The top of the third push rod 805 can slide along the second inclined plate 808 to the bottom of the mounting plate 807, thereby pushing the third sealing plate 702 to move downward along the fixed cover 701. At the same time, the fifth spring 804 is compressed, so that the circular hole 703 is staggered with the liquid inlet pipe 109. At this time, the third sealing plate 702 can be used to block and seal the liquid inlet pipe 109. At this time, the liquid pumping operation will not be performed through the liquid inlet pipe 109 and the liquid pumping pipe 106, which can generate negative pressure in the left chamber or the right chamber.

[0154] Under the action of pressure, the piston 1202 moves toward the left chamber or the right chamber, and drives the moving plate 1204 to move synchronously through the connecting rod 1203. At the same time, the first spring 1302 is compressed. When the moving plate 1204 moves, it drives the first push rod 207 to slide in the sliding groove 206, thereby driving the rotating plate 208 to rotate counterclockwise along the rotating pin 204. At this time, the sensing block 205 is moved away from the bottom of the proximity switch 202. Moreover, when the central shaft 103 moves, it drives the connecting frame 302 to move synchronously. The one-way rotating mechanism drives the rotating block 303 to move toward the fixed plate 1001. At this time, when the rotating block 303 abuts against the side wall of the conical block 301, the rack 906 abuts against the top of the supporting block 903 below, so that the rotating block 303 cannot rotate, thereby pushing the conical block 301 and the first moving block 201 to move downward. At the same time, the second spring 1003 is compressed and drives the proximity switch 202 to move downward synchronously. At this time, the proximity switch 202 cannot sense the sensing block 205, indicating that the sealing of the left chamber or the right chamber is good.

[0155] When the wind bag 102 and the central axis 103 continue to move, the second inclined plate 808 can pass over the top of the third push rod 805. At this time, the third sealing plate 702 can move upward under the action of the fifth spring 804, so that the circular hole 703 is aligned with the liquid inlet pipe 109. At this time, the liquid can enter the left chamber or the right chamber after passing through the liquid inlet pipe 109 and the liquid extraction pipe 106. If there is a problem with the sealing of the left chamber or the right chamber, no negative pressure will be generated in the left chamber or the right chamber. At this time, the movable plate 1204 will not move, and the rotating plate 208 will not rotate. At this time, the sensing block 205 will Located directly below the proximity switch 202, when the proximity switch 202 moves downward, it can be detected, and when there is a problem with the seal between the central shaft 103 and the valve plate 104, the liquid will leak into the collection tank 1207 for collection and detection by the liquid level sensor 1208. If the liquid level sensor 1208 does not detect the presence of liquid in the collection tank 1207, it means that there is a leak at the wind bag 102, so that when pumping liquid, the sealing of the left chamber or the right chamber can be detected, and leakage can be discovered in time, ensuring normal operation while being safer and more reliable;

[0156] Furthermore, when the air bag 102 moves toward the direction close to the groove 105, it can squeeze the liquid temporarily stored in the left chamber or the right chamber, and enter the second sealing plate 407 through the discharge pipe 107 and the outlet pipe 110, and filter the impurities in the second sealing plate 407 under the action of the filter net 403, and the filtered liquid flows out through the discharge pipe 402 for use, thereby ensuring the quality of subsequent products;

[0157] When it is necessary to clean the filter screen 403 and collect impurities, the electromagnet 505 can be energized. After being energized, the electromagnet 505 attracts the iron block 504, so that the first connecting block 502 moves downward. At the same time, the third spring 503 is compressed and drives the squeezing plate 404 and the first sealing plate 405 to move downward through the moving rod 501. The outlet of the liquid outlet pipe 110 can be temporarily blocked and sealed by the first sealing plate 405. At the same time, the squeezing plate 404 can scrape and clean the impurities on the surface of the filter screen 403, and can squeeze the impurities and the top of the second sealing plate 407 to squeeze. The compressed liquid can flow out through the filter screen 403 and the discharge pipe 402. After the squeezing is completed, when the first inclined plate 604 abuts against the end of the second push rod 602, the second push rod 602 can slide along the first inclined plate 604 to the side wall of the first L-shaped plate 603, thereby pushing the second sealing plate 407 out of the filter box 401. At the same time, the second moving block 601 slides on the side wall of the third T-shaped guide rod 605, and the fourth spring 606 is compressed. At this time, the bottom of the filter box 401 is opened, and the compressed impurities can fall into the collection box 406 through the bottom of the filter box 401 for collection;

[0158] Next, the electromagnet 505 is powered off. At this time, the first connecting block 502 can move upward and reset under the action of the third spring 503, and drive the extrusion plate 404 and the first sealing plate 405 to move upward and reset. When the end of the second push rod 602 is separated from the first inclined plate 604, the second sealing plate 407 can move and reset under the action of the fourth spring 606 and seal the bottom of the filter box 401. Finally, the collection box 406 can be pulled out of the pump body 101 for cleaning, so as to facilitate the filtering and collection of impurities in the corrosive liquid and ensure the production quality of the product.

Claims

1. A bellows pump for conveying corrosive liquids, comprising a pump body (101), a valve plate (104), a central axis (103), two bellows (102), a liquid extraction pipe (106) and a liquid discharge pipe (107) arranged on a bellows pump body, a left chamber and a right chamber being formed between the two bellows (102) and the valve plate (104), a liquid inlet pipe (109) being fixedly connected to a side wall of the liquid extraction pipe (106), a liquid outlet pipe (110) being arranged on a side wall of the liquid discharge pipe (107), and grooves (105) being arranged on both sides of the valve plate (104), characterized in that: Also includes: A mounting cavity (11) is provided in the valve plate (104); Two sets of detection mechanisms, arranged on the side wall of the installation cavity (11) close to the groove (105), for detecting the sealing properties of the two working cavities; The testing agencies in each group include: A through hole (1201) is formed on a side wall of the groove (105) and penetrates into the installation cavity (11); A guide sleeve (1206) is fixedly inserted in the through hole (1201), and a piston (1202) is slidably connected in the guide sleeve (1206); A first reset mechanism is disposed in the installation cavity (11), and a movable plate (1204) is connected to the first reset mechanism, and is used to guide the movement and reset the movable plate (1204), and the piston (1202) is fixed to the side wall of the movable plate (1204) via a connecting rod (1203); A collecting tank (1207) is arranged below the central axis (103) and fixed to the side wall of the mounting cavity (11), and a liquid level sensor (1208) is arranged in the collecting tank (1207); A collecting pipe (1205) is fixedly inserted into the bottom of the pump body (101) and is connected to the bottom of the collecting tank (1207) via a solenoid valve (1209); An opening and closing mechanism, arranged on a side wall of the liquid inlet pipe (109), and used for opening and closing the liquid inlet pipe (109); A detection component, arranged in the installation cavity (11), and used for detecting the movement of the movable plate (1204); The detection component comprises: A first moving mechanism is arranged in the installation cavity (11), and a first moving block (201) is connected to the first moving mechanism, and is used to lift and lower the first moving block (201); a proximity switch (202) is fixedly connected to the bottom of the first moving block (201); when the central axis (103) moves, the proximity switch (202) can be driven to move downward by the first moving mechanism; A support plate (203) fixed to a side wall of the installation cavity (11); The rotating plate (208) is rotated above the supporting plate (203) via the rotating pin (204), and the top of the rotating plate (208) is fixedly connected with a sensing block (205), so that the sensing block (205) can be located directly below the proximity switch (202); A sliding groove (206) is provided on the top of the rotating plate (208) and is arranged to penetrate the rotating plate (208); The first push rod (207) is inserted into the sliding groove (206) and fixed to the top of the moving plate (1204).

2. The bellows pump for conveying corrosive liquid according to claim 1, characterized in that: The first moving mechanism comprises: A conical block (301) fixed above the first moving block (201); A connecting frame (302) fixed to a side wall of the central axis (103); A one-way rotating mechanism is arranged below the connecting frame (302), and a rotating block (303) is connected to the one-way rotating mechanism so that the rotating block (303) can slide on the side wall of the conical block (301); The second reset mechanism is arranged on the side wall of the installation cavity (11), and the first moving block (201) is connected to the second reset mechanism.

3. The bellows pump for conveying corrosive liquid according to claim 2, characterized in that: The second reset mechanism comprises: A fixed plate (1001) disposed above the first moving block (201) and fixed to a side wall of the installation cavity (11); Two second T-shaped guide rods (1002) are fixed above the first moving block (201) and are arranged through the top of the fixed plate (1001); The two second springs (1003) are sleeved on the side walls of the two second T-shaped guide rods (1002), and the two ends of the second springs (1003) are respectively fixed to the top of the fixing plate (1001) and the top of the second T-shaped guide rods (1002).

4. The bellows pump for conveying corrosive liquid according to claim 1, characterized in that: Also includes: A filtering mechanism, arranged at the outlet end of the liquid outlet pipe (110), and used for filtering and collecting impurities in the liquid; The filtering mechanism comprises: A filter box (401) is fixed to the outlet end of the liquid outlet pipe (110) and is open at the bottom, and the filter box (401) is connected to the outside through a discharge pipe (402); A filter screen (403) is disposed in the filter box (401) and fixed to the inlet end of the discharge pipe (402); A second moving mechanism is arranged on the top of the filter box (401), and a squeezing plate (404) is connected to the second moving mechanism, and is used to lift and lower the squeezing plate (404), so that the squeezing plate (404) can slide inside the filter box (401) and on the surface of the filter screen (403); A first sealing plate (405) is inserted into the top of the filter box (401) and fixed to the top of the extrusion plate (404); A third moving mechanism is arranged on a side wall of the filter box (401), and the third moving mechanism is connected to a second sealing plate (407), so that the second sealing plate (407) can slide inside the filter box (401); The collecting box (406) is arranged below the filter box (401) and inserted into the side wall of the pump body (101).

5. The bellows pump for conveying corrosive liquid according to claim 4, characterized in that: The second moving mechanism comprises: Two moving rods (501) are fixed above the extrusion plate (404), and the upper ends of the moving rods (501) penetrate the top of the filter box (401) and are fixed to the side wall of the first sealing plate (405) through a first connecting block (502); The electromagnet (505) is fixed above the filter box (401), and an iron block (504) is fixedly connected to the bottom of the first connecting block (502) opposite to the electromagnet (505); The two third springs (503) are sleeved on the side walls of the two moving rods (501), and the two ends of the third springs (503) are respectively fixed to the top of the filter box (401) and the bottom of the first connecting block (502).

6. The bellows pump for conveying corrosive liquid according to claim 4, characterized in that: The third moving mechanism comprises: Two third T-shaped guide rods (605) fixed to the side walls of the filter box (401); A second moving block (601) is sleeved on the side walls of the two third T-shaped guide rods (605), and the second moving block (601) is fixed to the top of the second sealing plate (407), and the side wall of the second moving block (601) is fixedly connected to a second push rod (602); Two fourth springs (606) are sleeved on the side walls of the two third T-shaped guide rods (605), and two ends of the fourth springs (606) are respectively fixed to the side wall of the second moving block (601) and the end of the third T-shaped guide rod (605); The first inclined plate (604) is fixed to the side wall of the first sealing plate (405) via the first L-shaped plate (603), so that the first inclined plate (604) can slide on the end of the second push rod (602).

7. The bellows pump for conveying corrosive liquid according to claim 1, characterized in that: The opening and closing mechanism comprises: A fixed cover (701) is fixedly inserted into a side wall of the liquid inlet pipe (109) and is connected to the liquid inlet pipe (109); The fourth moving mechanism is arranged on the side wall of the fixed cover (701), and the third sealing plate (702) is connected to the fourth moving mechanism, and is used to lift and lower the third sealing plate (702). The third sealing plate (702) is inserted into the fixed cover (701) and a circular hole (703) is opened on the side wall.

8. The bellows pump for conveying corrosive liquid according to claim 1, characterized in that: The first reset mechanism comprises: Two first T-shaped guide rods (1301) are fixed to the side walls of the installation cavity (11), and the movable plate (1204) is sleeved on the side walls of the first T-shaped guide rods (1301); The two first springs (1302) are sleeved on the side walls of the two first T-shaped guide rods (1301), and the two ends of the first springs (1302) are respectively fixed to the side walls of the installation cavity (11) and the movable plate (1204).

9. The bellows pump for conveying corrosive liquid according to claim 7, characterized in that: The fourth moving mechanism comprises: Two second connecting blocks (803) are fixed on two sides of the fixed cover (701); Two fourth T-shaped guide rods (802) are inserted into the tops of the two second connection blocks (803), and the upper ends of the two fourth T-shaped guide rods (802) are fixed to the side walls of the third sealing plate (702) through the two third connection blocks (801); Two fifth springs (804) are sleeved on the side walls of the two fourth T-shaped guide rods (802), and two ends of the fifth springs (804) are respectively fixed to the top of the second connecting block (803) and the bottom of the third connecting block (801); A mounting plate (807) is fixed to the side wall of the central axis (103) via a second L-shaped plate (806), and two second inclined plates (808) are fixedly connected to both sides of the mounting plate (807); The third push rod (805) is fixed to the top of the third sealing plate (702), so that the upper end of the third push rod (805) can slide on the bottom of the second inclined plate (808).

10. The bellows pump for conveying corrosive liquid according to claim 2, characterized in that: The one-way rotation mechanism comprises: A fixed block (908) is fixed below the connecting frame (302), and the rotating block (303) rotates on the side wall of the fixed block (908) via a rotating shaft (901); A gear (902) fixedly sleeved on a side wall of the rotating shaft (901); A reset assembly is arranged on the side wall of the fixed block (908), and a rack (906) is connected to the reset mechanism, and the rack (906) is meshed with the gear (902).

11. The bellows pump for conveying corrosive liquid according to claim 10, characterized in that: The reset component comprises: Two supporting blocks (903) are fixed to the side walls of the fixing block (908), and two guide rods (904) are fixedly connected to the opposite side walls of the two fixing blocks (908); Two sliding blocks (905) are sleeved on the side walls of the two guide rods (904) and fixed to the side walls of the rack (906); The two sixth springs (907) are sleeved on the side walls of the two guide rods (904), and the two ends of the sixth springs (907) are respectively fixed to the top of the sliding block (905) and the bottom of the upper support block (903).

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