CN210033783U

CN210033783U - Pneumatic diaphragm pump with stable working of scavenging valve

Info

Publication number: CN210033783U
Application number: CN201920768272.4U
Authority: CN
Inventors: 叶晓华
Original assignee: Shanghai Xia Feibeng Industry Co Ltd
Current assignee: Shanghai Xia Feibeng Industry Co Ltd
Priority date: 2019-05-25
Filing date: 2019-05-25
Publication date: 2020-02-07
Anticipated expiration: 2029-05-25

Abstract

The utility model relates to a pneumatic diaphragm pump of stable work of scavenging valve, including the pump body and vertically set up in the scavenging valve at pump body middle part, the scavenging valve includes the switching-over valve case, switching-over valve case middle part has seted up movable chamber along switching-over valve case axis direction, the movable chamber is connected with the piston along the sliding of activity chamber axis direction, the one end diameter of piston is greater than other end diameter 1.2-1.5 times, the both ends of switching-over valve case all are provided with the switching-over valve chock plug, the switching-over valve chock plug is including inserting and locating activity chamber tip valve gap, the valve gap can be dismantled and connect in the switching-over valve. The utility model discloses the case that has and to avoid the pneumatic valve can't move when being in the dead point position, guarantees the effect of the normal work of pneumatic diaphragm pump.

Description

Pneumatic diaphragm pump with stable working of scavenging valve

Technical Field

The utility model belongs to the technical field of the technique of diaphragm pump and specifically relates to a pneumatic diaphragm pump of scavenging valve stable operation is related to.

Background

The pneumatic diaphragm pump is a novel pump in China at present, adopts compressed air as a power source, and can completely suck various corrosive liquids, liquids with particles, high viscosity, high toxicity and the like. The pneumatic diaphragm pump has four materials: plastic, aluminum alloy, cast iron, stainless steel. The diaphragm pump can adopt different colloids according to the requirements of different users. Pumping media that cannot be pumped by various conventional pumps. The middle pump body of the currently used pneumatic diaphragm pump is generally large in size, high in production cost, not compact in structure and complex in structures of the air interchanger and the air inlet device.

The existing referenceable authorization publication numbers are: chinese utility model patent CN208416888U, it provides an air distribution valve assembly on being used for double diaphragm pump, includes: the air valve comprises an air valve main body, wherein a main air source interface is arranged at the upper end of the middle part of the air valve main body, a piston installation cavity is arranged in the air valve main body, a piston is arranged in the piston installation cavity, wear-resistant sleeves are arranged in the piston installation cavities at two ends of the piston, a sealed cavity is formed between each wear-resistant sleeve and the piston and between each wear-resistant sleeve and the air valve main body, end covers are arranged at two ends of the piston, the end covers are installed on the air valve main body through elastic check rings, a sliding block is arranged on the lower. The utility model discloses accessories are few, and it is convenient to maintain, and sealing performance is good, and gas pressure 0 loss, the promotion resistance is little, and the switching-over of control pneumatic valve can be energy-conserving 40% to can ensure not dead machine in the work, wearing parts use wear-resisting ceramic subassembly or other wearability material subassemblies life-span to increase 4-5 times, are fit for working under abominable environment.

The gas valve in the above background art uses only the air pressure difference to push the valve core (i.e. the piston in the above reference) to move in the reversing valve housing (i.e. the gas valve body in the above reference). However, there is a drawback in such a structure that once the valve is stopped at a position where the pressure difference is just zero, the valve cannot be actuated at the next start-up time by only inputting compressed air. The valve core of the air valve is pushed by manual operation, the position of the valve core in the reversing valve shell is slightly changed, and the air valve can act. Although the probability that the valve core of the air valve stays at the dead point position is not high, once the situation occurs, the situation is very troublesome, and the position of the valve core can be adjusted only by detaching the air valve shell.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pneumatic diaphragm pump of scavenging valve steady operation can avoid the case of pneumatic valve unable motion when being in the dead point position, guarantees the normal work of pneumatic diaphragm pump.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a pneumatic diaphragm pump of stable work of scavenging valve, includes the pump body and vertically sets up in the scavenging valve at pump body middle part, the scavenging valve includes the switching-over valve case, the movable chamber has been seted up along switching-over valve case axis direction in the switching-over valve case middle part, the movable chamber is connected with the piston along the sliding of movable chamber axis direction, the one end diameter of piston is greater than other end diameter 1.2-1.5 times, the both ends of switching-over valve case all are provided with the switching-over valve chock plug, the switching-over valve chock plug is including inserting and locating movable chamber tip valve gap, the connection can be dismantled in the.

Through adopting above-mentioned technical scheme, the one end diameter through the piston that adopts is greater than other end diameter to can make the one end quality of piston be greater than other end quality, thereby can break the balance at piston both ends, and then when the piston just in time stopped at the dead point position, the dead point position can be overcome automatically to the great one end of quality to the piston, and then guarantees the normal motion of movable valve.

The utility model discloses further set up to: the both ends in activity chamber all are provided with the plug bush, the global all can the butt in the inboard of plug bush in both ends of piston.

By adopting the technical scheme, the two ends of the piston can be prevented from being worn at the two ends of the movable cavity through the adopted plug bushes, so that the reversing valve shell is protected.

The utility model discloses further set up to: the annular seal groove has all been seted up to the both ends global of piston, the sealing groove has all been held the sealing washer, the outside butt of sealing washer is in the inboard of plug bush.

Through adopting above-mentioned technical scheme, the sealing washer through adopting can strengthen the both ends of piston and the leakproofness of plug bush, guarantees the switching-over valve and stablizes work.

The utility model discloses further set up to: the sealing ring is a lip-shaped sealing ring, and the lips of the two sealing rings lean against each other.

The utility model discloses further set up to: the circumferential surface of the plug bush is provided with an annular groove, and a sealing ring which can be abutted against the inner side of the movable cavity is arranged in the annular groove.

Through adopting above-mentioned technical scheme, can be further sealed between the movable chamber of plug bush and switching-over valve casing through the sealing ring that adopts to prevent that the movable chamber from revealing from the valve gap at both ends.

The utility model discloses further set up to: the valve gap all is connected with the blotter in the equal rigid coupling of one side that is close to each other.

Through adopting above-mentioned technical scheme, through the blotter that adopts, can reduce the case to the impact of valve gap to protect the life of mutual valve gap extension valve gap.

The utility model discloses further set up to: the outer side of the valve cover is recessed in the end face of the reversing valve shell by 0.1-0.3 mm.

Through adopting above-mentioned technical scheme, through the valve gap outside recess in the switching-over valve casing terminal surface that adopts, reduce the collision of external object to the valve gap to protect the valve gap, prolong the life of valve gap.

The utility model discloses further set up to: the outer peripheral surface of the valve cover is in threaded connection with the reversing valve shell.

Through adopting above-mentioned technical scheme, through the outer peripheral face threaded connection of the valve gap that adopts in the switching-over valve casing relegate insert locate the switching-over valve chock plug fixed plate in the slot can realize mutual locking, can further prevent that the valve gap from breaking away from the switching-over valve casing, guarantee the stable connection of valve gap.

The utility model discloses further set up to: a plurality of jacks are formed in the outer side of the valve cover.

The jack that adopts can convenient to use person rotate the valve gap, the opening or closing of the valve gap of being convenient for, convenient to use, easy operation.

The utility model discloses further set up to: the positions of the reversing valve shell corresponding to the two ends of the movable cavity are provided with conical guide rings.

By adopting the technical scheme, the guide ring can facilitate the valve cover to be inserted into the two ends of the movable cavity, so that the valve cover and the reversing valve shell can be conveniently installed, and the use is convenient.

To sum up, the utility model discloses a beneficial technological effect does:

1. the diameter of one end of the adopted piston is larger than that of the other end of the adopted piston, so that the mass of one end of the piston is larger than that of the other end of the piston, the balance of the two ends of the piston can be broken, and when the piston just stays at a dead point position, the piston can automatically overcome the dead point position by depending on the end with larger mass, and the normal movement of the movable valve is further ensured;

2. the two ends of the piston can be prevented from wearing the two ends of the movable cavity through the adopted plug bush, so that a reversing valve shell is protected;

3. through the blotter of adoption, can reduce the impact of case to the valve gap to protect the life of valve gap extension valve gap each other.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is an exploded view of the structure of the reversing valve housing of the present invention.

Fig. 3 is a schematic view of the valve core structure of the present invention.

Fig. 4 is an enlarged view of a portion a in fig. 3.

In the figure, 1, a pump body; 2. a scavenging valve; 21. a diverter valve housing; 211. a movable cavity; 2111. a limiting ring; 212. an air inlet; 213. an air guide port; 214. a guide ring; 215. a slot; 2151. a first guide groove; 22. a pilot valve plate; 221. a vent; 23. a pilot valve slide block; 24. a piston; 241. a positioning ring; 242. a sealing groove; 243. a seal ring; 25. a reversing valve plug; 251. a valve cover; 2511. a jack; 2512. a through groove; 2513. a second guide groove; 2514. a cushion pad; 252. inserting a sleeve; 2521. an airway; 2522. chamfering; 2523. an annular groove; 2524. a seal ring; 26. a reversing valve plug fixing plate; 3. a base plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a pneumatic diaphragm pump of scavenging valve steady operation, including the pump body 1, the pump body 1 includes two diaphragm chambeies. A scavenging valve 2 is vertically and fixedly connected with the pump body 1 at a position corresponding to the space between the two diaphragm cavities.

Referring to fig. 2 and 3, the scavenging valve 2 includes the reversing valve casing 21 and sets up in the reversing valve casing 21 and is close to the bottom plate 3 of the pump body 1 one side, movable chamber 211 has been seted up along the axis direction of reversing valve casing 21 in the middle part of reversing valve casing 21, reversing valve casing 21 corresponds movable chamber 211 and has been close to the one side of keeping away from bottom plate 3 and seted up air inlet 212, air guide port 213 has been seted up respectively at one side both ends that are close to bottom plate 3 in movable chamber 211, movable chamber 211 is close to one side middle part position fixedly connected with pilot valve plate 22 of bottom plate 3, three vent 221 has been seted up along the axis. A pilot valve slide block 23 capable of moving along the axial direction of the movable cavity 211 is arranged in the movable cavity 211 corresponding to the upper side of the pilot valve plate 22, and the pilot valve slide block 23 can move along the axial direction of the movable cavity 211 to complete the communication between the two side air ports 221 and the middle air port 221.

Be provided with piston 24 in the activity chamber 211, piston 24 can slide along the axis direction in activity chamber 211, piston 24's middle part is provided with two holding rings 241, the both sides of pilot valve slider 23 can butt in the one side that holding ring 241 is close to each other, and the downside of pilot valve slider 23 can butt in the one side that activity chamber 211 is close to bottom plate 3, when piston 24 slides along activity chamber 211, holding ring 241 through piston 24 can drive pilot valve slider 23 and remove, thereby make pilot valve slider 23 accomplish the intercommunication respectively of both sides blow vent 221 and middle part blow vent 221.

The diameter of one end of the piston 24 is 1.3-1.5 times the diameter of the other end. The reversing valve case 21 is also provided with reversing valve plugs 25 at positions corresponding to the two ends of the movable cavity 211, each reversing valve plug 25 comprises a valve cover 251, one ends, close to each other, of the valve covers 251 can be inserted into the end of the movable cavity 211, the peripheral surfaces of the valve covers 251 are in threaded connection with the end of the movable cavity 211, the valve covers 251 are installed at the two ends of the reversing valve case 21, and the outer side surfaces of the valve covers 251 are recessed in the end surfaces of the reversing valve case 21 by 0.1-0.3 mm. The reversing valve housing 21 is provided with tapered guide rings 214 at positions corresponding to the two ends of the movable cavity 211, and the valve cover 251 can be conveniently inserted into the end of the movable cavity 211 through the guide rings 214. In order to facilitate the rotation of the valve cap 251, the valve cap 251 is installed in the reversing valve housing 21, and a plurality of insertion holes 2511 are formed on the outer side of the valve cap 251.

The middle part of valve gap 251 still sets up the logical groove 2512 that can run through valve gap 251 both sides along the direction of perpendicular to valve gap 251 axis, and the slot 215 that extends to activity chamber 211 is all seted up towards the direction in activity chamber 211 to the both sides that the both ends of switching-over valve casing 21 are close to and keep away from bottom plate 3, and two slots 215 of switching-over valve casing 21 one end all can communicate with the logical groove 2512 of valve gap 251. The slot 215 and the through slot 2512 are rectangular slots, and the length and the width of the slot 215 and the through slot 2512 are the same. The two ends of the reversing valve housing 21 are also provided with a reversing valve plug fixing plate 26 which can be inserted into the slot 215 and the through slot 2512, and each side of the reversing valve plug fixing plate 26 can be abutted against each side of the slot 215 and inserted into the through slot 2512 in an interference fit connection mode. The bottom plate 3 is bolted to one side of the reversing valve housing 21, and one end of the reversing valve plug head fixing plate 26 can abut against the bottom plate 3. In order to facilitate the insertion of the plug head fixing plate 26 in the slot 215 and the through slot 2512, the outer side of the slot 215 on the side far away from the bottom plate 3 is provided with a first guide groove 2151, and the side surfaces of the two ends of the through slot 2512 are provided with second guide grooves 2513. Through the adoption insert locate slot 215 and through groove 2512 in the switching-over valve cock head fixed plate 26 can be fixed in switching-over valve casing 21 with switching-over valve cock head 25, prevent that switching-over valve cock head 25 from removing, the interference fit of adoption can prevent that switching-over valve cock head fixed plate 26 from moving, and then can be with the firm both ends that are fixed in switching-over valve casing 21 of switching-over valve cock head 25, the outer peripheral face threaded connection of valve gap 251 that adopts in addition is in switching-over valve casing 21 deuterogamy insert the switching-over valve cock head fixed plate 26 of locating in slot 215 and can realize locking each other, can further prevent that valve gap 251 from breaking away from on switching-over valve casing 21, guarantee the.

Referring to fig. 2 and 4, plug sleeves 252 capable of being inserted into the movable cavity 211 are further fixedly connected to the sides of the valve cap 251 adjacent to each other, and air passages 2521 capable of communicating with the interior of the plug sleeves 252 are formed at positions of the plug sleeves 252 corresponding to the two air guide openings 213. A chamfer 2522 is formed at the outer side of one end, close to each other, of the plug bush 252, so that the plug bush 252 can be conveniently arranged in the movable cavity 211, the two ends of the inner side of the movable cavity 211 of the reversing valve shell 21 are also fixedly connected with limit rings 2111, and one end, close to each other, of the plug bush 252 can abut against the limit rings 2111. A plurality of annular grooves 2523 are formed in the outer peripheral surface of the sleeve 252, sealing rings 2524 are accommodated in the annular grooves 2523, the outer sides of the sealing rings 2524 can be abutted against the inner sides of the movable cavity 211, and the sleeve 252 and the movable cavity 211 of the reversing valve housing 21 can be further sealed by the sealing rings 2524, so that the movable cavity 211 is prevented from leaking from the valve covers 251 at the two ends.

Both ends of the piston 24 can be respectively inserted into the insertion sleeves 252 of the two reversing valve plugs 25, and both ends of the piston 24 can slide in the insertion sleeves 252 along the axial direction of the insertion sleeves 252. An annular seal groove 242 is further formed in the circumferential surface of each end of the piston 24, a seal ring 243 is accommodated in each seal groove 242, the seal ring 243 is a lip seal 243, the lips of the two lip seals 243 are opposite, and the outer side of the seal ring 243 can abut against the inner side of the insert sleeve 252. The side of the valve cover 251 close to each other is also fixedly connected with a buffer 2514. The sealing performance between the two ends of the piston 24 and the plug 252 can be enhanced through the adopted sealing ring 243, the stable operation of the reversing valve is ensured, and when the piston 24 slides in the movable cavity 211, the impact of the piston 24 on the valve cover 251 can be reduced through the adopted buffering cushion 2514, and the valve cover 251 is protected.

The implementation principle of the embodiment is as follows: the reversing valve plug head 25 can be fixed in the reversing valve housing 21 through the reversing valve plug head fixing plate 26 inserted in the slot 215 and the through slot 2512, the reversing valve plug head 25 is prevented from moving, the reversing valve plug head fixing plate 26 can be limited through interference fit, the reversing valve plug head fixing plate 26 can be prevented from moving, the reversing valve plug head 25 can be firmly fixed at two ends of the reversing valve housing 21, in addition, the reversing valve plug head is connected to the reversing valve housing 21 through the outer peripheral surface of the valve cover 251 in a threaded mode, and then the reversing valve plug head fixing plate 26 inserted in the slot 215 is matched to realize mutual locking, so that the valve cover 251 can be further prevented from being separated from the reversing valve housing 21, and stable connection of the valve cover 251 is ensured; in addition, when the piston 24 slides in the movable cavity 211, both ends of the piston 24 can slide in the two movable sleeves, so that friction between both ends of the piston 24 and the reversing valve housing 21 is avoided, and when both ends of the piston 24 wear the inner side walls of the two movable sleeves, the two reversing valve plugs 25 are detached from both ends of the reversing valve housing 21 to replace the new reversing valve plugs 25, so that the waste for replacing the whole reversing valve housing 21 is low, and the operation is simple; secondly, the diameter of one end of the piston 24 is larger than that of the other end of the piston 24, so that the mass of one end of the piston 24 is larger than that of the other end of the piston, the balance of the two ends of the piston 24 can be broken, and when the piston 24 just stays at the dead point position, the dead point position can be automatically overcome by the end with larger mass of the piston 24, and the normal movement of the movable valve is further ensured.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides an air operated diaphragm pump of scavenging valve steady operation, includes the pump body (1) and vertically sets up in scavenging valve (2) at the pump body (1) middle part, scavenging valve (2) are including switching-over valve case (21), movable chamber (211) have been seted up along switching-over valve case (21) axis direction in switching-over valve case (21) middle part, it is connected with piston (24), its characterized in that to slide along movable chamber (211) axis direction in movable chamber (211): the diameter of one end of the piston (24) is 1.2-1.5 times larger than that of the other end of the piston, reversing valve plug heads (25) are arranged at two ends of the reversing valve shell (21), each reversing valve plug head (25) comprises a valve cover (251) inserted into the end of the movable cavity (211), and the valve covers (251) are detachably connected to the reversing valve shell (21).

2. A pneumatically operated diaphragm pump with stable operation of the gas exchange valve according to claim 1, wherein: plug bushes (252) are arranged at two ends of the movable cavity (211), and peripheral surfaces of two ends of the piston (24) can be abutted to the inner sides of the plug bushes (252).

3. A pneumatically operated diaphragm pump with stable operation of the gas exchange valve according to claim 1, wherein: annular seal groove (242) have all been seted up to the both ends global of piston (24), all hold sealing washer (243) in seal groove (242), the outside butt in the inboard of plug bush (252) of sealing washer (243).

4. A pneumatically operated diaphragm pump with stable operation of the gas exchange valve according to claim 3, wherein: the sealing ring (243) is a lip-shaped sealing ring (243), and the lips of the two sealing rings (243) are mutually abutted.

5. A pneumatically operated diaphragm pump with stable operation of the gas exchange valve according to claim 2, wherein: an annular groove (2523) is formed in the peripheral surface of the insert sleeve (252), and a sealing ring (2524) with the outer side capable of abutting against the inner side of the movable cavity (211) is arranged in the annular groove (2523).

6. A pneumatically operated diaphragm pump with stable operation of the gas exchange valve according to claim 1, wherein: and one sides of the valve covers (251) close to each other are fixedly connected with cushion pads (2514).

7. A pneumatically operated diaphragm pump with stable operation of the gas exchange valve according to claim 1, wherein: the outer side of the valve cover (251) is recessed 0.1-0.3mm from the end face of the reversing valve shell (21).

8. A pneumatically operated diaphragm pump with stable operation of the gas exchange valve according to claim 1, wherein: the outer peripheral surface of the valve cover (251) is screwed to the reversing valve housing (21).

9. A pneumatically operated diaphragm pump with stable operation of the gas exchange valve according to claim 1, wherein: a plurality of insertion holes (2511) are formed in the outer side of the valve cover (251).

10. A pneumatically operated diaphragm pump with stable operation of the gas exchange valve according to claim 1, wherein: conical guide rings (214) are arranged at the positions of the reversing valve shell (21) corresponding to the two ends of the movable cavity (211).