CN209539621U - It is a kind of for feeding the pump of methanol - Google Patents

Abstract

It is a kind of for feeding the pump of methanol, including bearing bracket, bearing bracket is connected with pump bracket, gland before bearing bracket one end connects, pump case is contacted with preceding gland, main shaft is provided in bearing bracket, main shaft one end passes through preceding gland and is located in pump case, and the main shaft other end connects box coupling, the centre of pump case and bearing bracket is provided with power unit, Bearning mechanism and seal assembly, the claw coupling convenient disassembly of use, is easy to overhaul, and pump shaft rotation is made to keep stablizing；Axle sleeve and impeller and impeller and impeller back of the body cap component touch interface complexity improve, to effectively methanol liquid be prevented to penetrate into, preferably main shaft can be protected not to be corroded, can reduce the requirement of pump shaft material, to reduce production cost；Spiral case is additionally arranged at the bottom a drain line, after the completion of pumping use, can timely exclude methanol liquid remaining in spiral case and deposited particles, avoids being stored for a long time to pump housing generation corrosion and blocking, to improve the service life of pump.

Description

A pump for supplying methanol

technical field

The utility model belongs to the technical field of mechanical equipment for transporting chemical raw materials, in particular to a pump for supplying methanol.

Background technique

Methanol, as a very important organic chemical raw material and high-quality fuel, is mainly used in fine chemicals, plastics and other fields. and one of the important raw materials of medicine. Methanol can be used as a new type of clean fuel after deep processing, and it can also be mixed with gasoline. Methanol is a colorless, transparent, flammable, volatile and toxic liquid.

Among the various pumps for transporting methanol, the centrifugal pump has the advantages of large capacity, compact structure, uniform flow rate, easy adjustment and wide application range. It can be made of high-quality corrosion-resistant materials and is suitable for conveying corrosive liquid raw materials. Methanol is toxic and highly corrosive, and ordinary materials will be dissolved by methanol. Therefore, the sealing ring, impeller, pump cover and pump body of the pump must be made of materials with good corrosion resistance and good sealing performance.

Contents of the invention

In order to overcome the shortcomings of the prior art above, the purpose of this utility model is to provide a pump for supplying methanol, which improves the sealing performance of the methanol pump and can conveniently and quickly discharge the residual liquid in the volute.

In order to achieve the above object, the technical solution adopted by the utility model is:

A pump for supplying methanol, comprising a bearing bracket, the bearing bracket is connected with a pump bracket, one end of the bearing bracket is connected with a front gland, the pump casing is in contact with the front gland, a main shaft is arranged in the bearing bracket, and one end of the main shaft passes through the The front gland is located in the pump casing, the other end of the main shaft is connected to the sleeve coupling, and the power unit, bearing mechanism and sealing assembly are arranged between the pump casing and the bearing bracket;

The power unit includes an impeller connected to one end of the main shaft. The main shaft connected to one end of the impeller is located in the pump casing. The impeller is fixed on the main shaft through a matching back cap assembly. There is a "○" shape between the volute pressure plate and the sealing cover. The sealing ring is connected and fixed by double-headed studs, and also includes pipe joints and gaskets arranged on the sealing cover, and the other end of the welded assembly is an oil filter;

The bearing mechanism includes a sealing ring set on the main shaft, which is located in the front and rear glands of the bearing bracket. The front gland is provided with a dust cover, and the front gland and the rear gland are provided with " ○” type sealing ring; one end close to the impeller is a single tapered roller bearing, and there is a retaining ring between the inner side and the bearing bracket, and the other end is two deep groove ball bearings, and there is a retaining ring and an adjusting ring near the bearing housing The other side is equipped with a thrust washer and back cap assembly to prevent axial sliding; the adjusting ring is used to adjust the axial position of the bearing; the retaining ring, thrust washer and bearing back cap are used to limit the axial movement of the bearing, The gland seals both ends of the bearing bracket, and the dust cover can prevent dust from entering the inside of the bearing and affecting the operation of the bearing;

The sealing assembly includes a shaft sleeve outside the main shaft and a sealing gasket, and the sealing gasket is located at the contact interface between the impeller and the main shaft sleeve; it also includes a mechanical seal and an oil filter pipeline leading from the mechanical seal;

The pump casing is respectively provided with a suction chamber and a discharge chamber, the axes of the suction chamber and the discharge chamber are vertical, the suction chamber and the main shaft are located on the same axis, and the walls of the suction chamber and the discharge chamber are all provided with threads, and the bottom of the volute It is equipped with a drain line, which can discharge the residual liquid in time;

The sleeve coupling includes a pump shaft coupling connected to the main shaft, the pump shaft coupling is connected to one end face of the coupling sleeve through a pin, an elastic ring is arranged between the pin and the pump shaft coupling, and the sleeve The other end of the cylinder is connected with a claw coupling by screws, and the other end of the claw coupling is connected with the motor coupling; Connected with the coupling sleeve, the motor coupling is connected with the coupling sleeve through screws, and the rubber block fills the gap in the claw coupling;

Lubricating oil is stored inside the bearing bracket. There is a small hole on the upper wall of the bearing bracket to install the air release plug. There is a plug, and the rear wall is connected with a constant oil level device, through which the height of the lubricating oil inside the bearing bracket can be observed;

The adapter seat is connected between the volute and the bearing bracket, and the sealing cover is fixed with the adapter seat by studs to play a sealing role. At the same time, the two plugs can prevent the methanol inside the volute from leaking through the gap;

A mechanical seal is used around the pump shaft, and a ○-shaped sealing ring is installed on the outside of the mechanical seal for self-tight sealing. The joint between the shaft sleeve and the impeller is designed as a right-angle interface, which increases the length of the gap. The ○-shaped sealing ring is used for sealing to prevent methanol leakage , the positioning pin is used to fix the relative position of the volute gland and the adapter seat, and the volute gland has the function of sealing and connecting;

The impeller is connected to the pump shaft through the impeller key; the impeller back cap assembly locks the impeller on the pump shaft, and the front and rear contact interfaces of the impeller and the back cap assembly and the shaft sleeve are designed to be at right angles, rather than the general plane contact. Increase the length of the gap, the oil filter is connected to the pipeline to the mechanical seal, and the oil inside it can fill the gap to prevent air or liquid leakage;

The pipe joint is connected to the discharge pipeline for releasing excess methanol, wherein the outer casing nut is connected with the pipe joint, and the pipe sleeve ensures the sealing of the joint to prevent methanol leakage. The steel pipe is the channel for methanol to flow out, and the flange It is connected with the gland by nuts and bolts, and there is a gasket in the middle to ensure the tightness and prevent liquid leakage. The flange is used to connect the steel pipe and the gland to make it tightly combined to form a detachable joint. The cover is removed to release the liquid, and after the liquid is drained, the gland can be tightened with bolts to continue to use.

The sealing cover and the shaft sleeve are made of 1Cr18Ni9Ti stainless steel.

The bearing bracket, gland, front gland and pump support adopt HT25-47.

The dust cover is made of material ZG1Cr18Ni9Ti.

The sealing gasket is made of polytetrafluoroethylene, which has low friction and can resist methanol corrosion.

The material used for the double-ended studs is Cr18Ni12Mo2Ti, which has good corrosion resistance.

A sign is fixed on the adapter seat through rivets.

The material used for each main part of the sleeve coupling is ZG45.

The beneficial effects of the utility model are:

All parts of the methanol feeding pump of the utility model that are in contact with methanol or indirectly are made of good anti-corrosion materials with low cost and improved work efficiency; The rotation remains stable; the complexity of the contact interface between the shaft sleeve and the impeller and the impeller and the back cap assembly of the impeller increases, thereby effectively preventing methanol liquid from penetrating, better protecting the main shaft from corrosion, and reducing the requirements for pump shaft materials, thereby reducing production costs ; A drain line is installed at the bottom of the volute. After the pump is used, the residual methanol liquid and sediment particles in the volute can be removed in time to avoid corrosion and blockage of the pump body caused by long-term storage, thereby improving the pump performance. service life.

Description of drawings

Fig. 1 is a kind of pump structural representation that is used for supplying methanol of the utility model;

Fig. 2 is a schematic structural view of a pump coupling for supplying methanol of the present invention;

Fig. 3 is a side sectional view of a pump bearing bracket for supplying methanol of the present invention;

Fig. 4 is a schematic diagram of a pump impeller for supplying methanol of the present invention;

Fig. 5 is a schematic diagram of a pump drainage pipeline for supplying methanol in the present invention;

Fig. 6 is a schematic diagram of a pump adapter for supplying methanol according to the present invention.

Among them, 1 pump shaft coupling, 2 screws, 3 connecting sleeve, 4 claw type coupling, 5 motor coupling, 6 rubber block, 7 coupling, 8 key, 9 rear gland, 10 bearing back Cap, 11 gasket A, 12 deep groove ball bearing, 13 vent plug, 14 bearing bracket, 15 retaining ring, 16 tapered roller bearing, 17 screw, 18 front gland, 19 dust cover, 20 sealing ring, 21 bracket, 22 stud, 23 sealing cover, 24 stud, 25 ○ type sealing ring A, 26 mechanical seal, 27 plug A, 28 adapter seat, 29 ○ type sealing ring B, 30 positioning pin, 31 Volute gland, 32 shaft sleeve, 33 volute, 34 impeller, 35 back cap assembly, 36 key, 37 gasket B, 38 pipe joint, 39 drain line, 40 outer casing nut, 41 sleeve, 42 steel pipe, 43 Nut, 44 Flange, 45 Gasket, 46 Gland, 47 Bolt, 48 Suction chamber, 49 Extrusion chamber, 50 Constant oil level device, 51 Plug, 52 Pin, 53 Sign, 54 Rivet, 55 Thrust pad Sheet, 56 adjusting ring, 57 gasket D, 58 gasket C, 59 oil filter.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figures 1 to 6, a pump for supplying methanol includes a bearing bracket 14, the bearing bracket 14 is connected to a pump bracket 21, one end of the bearing bracket 14 is connected to the front gland 18, the pump casing and the front gland 18 contacts, the bearing bracket 14 is provided with a main shaft, one end of the main shaft passes through the front gland 18 and is located in the pump casing, the other end of the main shaft is connected to the sleeve coupling, and the middle of the pump casing and the bearing bracket 14 is provided with a power unit, a bearing Mechanism and sealing components;

The power unit includes an impeller 34 connected to one end of the main shaft, the main shaft connected to one end of the impeller 34 is located in the pump casing, the impeller 34 is fixed on the main shaft through a matching back cap assembly 35, the pressure plate of the volute 33 and the sealing cover 23 There is a "○" type sealing ring A25 between them, and it is connected and fixed by a stud 24, and also includes a pipe joint 38 and a gasket arranged on the sealing cover 23, and the other end of the welded assembly is an oil filter 59;

The bearing mechanism includes a sealing ring 20 sleeved on the main shaft, located in the front and rear glands 9 of the bearing bracket 14, the front gland 18 is provided with a dust cover 19, the front gland 18 and the rear gland 9 are all connected to the bearing There is a "○"-shaped sealing ring A25 between the brackets 14; a single tapered roller bearing 16 at one end close to the impeller 34, a retaining ring 15 between the inner side and the bearing bracket 14, and two deep groove ball bearings at the other end 12. There is a retaining ring (15) and an adjusting ring 56 on one side near the bearing box, and a thrust washer 55 and a back cap assembly on the other side to prevent axial sliding; the adjusting ring 56 is used to adjust the axial position of the bearing; The retaining ring 15, thrust washer 55 and bearing back cap 10 are used to limit the axial movement of the bearing, the gland 46 seals both ends of the bearing bracket, and the dust cover 19 can prevent dust from entering the inside of the bearing and affecting the operation of the bearing;

The sealing assembly includes a shaft sleeve 32 outside the main shaft and a gasket A11, the gasket A11 is located at the contact interface between the impeller 34 and the main shaft sleeve; it also includes a mechanical seal 26 and an oil filter pipeline leading from the mechanical seal 26;

The pump casing is respectively provided with a suction chamber 48 and an extrusion chamber 49, the axes of the suction chamber 48 and the extrusion chamber 49 are vertical, the suction chamber 48 is on the same axis as the main shaft, and the inner walls of the suction chamber 48 and the extrusion chamber 49 are all provided with There are threads, and the bottom of the volute 33 is provided with a liquid discharge pipeline 39, which can discharge the residual liquid in time;

The sleeve coupling includes a pump shaft coupling 1 connected to the main shaft, the pump shaft coupling 1 is connected to one end surface of the coupling sleeve 3 through a pin, and an elastic spring is arranged between the pin and the pump shaft coupling. The other end of the sleeve 3 is connected with a claw coupling 4 through a screw 2, and the other end of the claw coupling 4 is connected with the motor coupling 5; the coupling 7 is connected by the motor coupling 5 through a key 8 The motor shaft is connected, the claw coupling 4 is connected with the coupling sleeve 3 through the screw 2, the motor coupling 5 is connected with the coupling sleeve 3 through the screw 2, and the rubber block 6 fills the gap in the claw coupling 4;

Lubricating oil is stored inside the bearing bracket 14, and the upper wall of the bearing bracket 14 has a small hole to install the air release plug 13, and there is a small hole in the middle of the air release plug 13 to communicate with the outside and the inside, so as to balance the air pressure; A plug B51 is installed on the front wall of the frame 14, and a constant oil level device 50 is connected to the rear wall, through which the height of lubricating oil inside the bearing bracket can be observed;

The adapter seat 28 is connected between the volute 33 and the bearing bracket 14, and the sealing cover (23) is fixed with the adapter seat 28 by the double-ended stud 24 to play a sealing role, while the two plugs (27) can Prevent the leakage of methanol inside the volute through the gap;

A mechanical seal 26 is used around the pump shaft, and an ○-shaped sealing ring A25 is installed on the outside of the mechanical seal 26 for self-tight sealing. Used for sealing to prevent methanol leakage, the positioning pin 30 is used to fix the relative position of the volute gland 31 and the adapter seat 28, and the volute gland has the function of sealing and connecting;

The impeller 34 is connected to the pump shaft through the impeller key 36; the impeller back cap assembly 35 locks the impeller 34 on the pump shaft. Ordinary plane contact increases the length of the gap. The oil filter 59 is connected to the pipeline to the mechanical seal 26, and the oil inside it can fill the gap to prevent air or liquid leakage;

The pipe joint 38 is connected to the discharge pipeline 39 for releasing excess methanol, wherein the outer casing nut 40 is connected with the pipe joint 38, and the pipe sleeve 41 ensures the tightness of the joint to prevent methanol leakage. The steel pipe 42 is methanol Outflow channel, the flange 44 and the gland 46 are connected by nuts 43 and bolts 47, and there is a gasket 45 in the middle to ensure sealing and prevent liquid leakage. The flange 44 is used to connect the steel pipe 42 and the gland 46 to make it tight Combined to form a detachable joint, the gland is removed to release the liquid when draining, and the gland can be continued to use after the drain is completed by tightening the gland with bolts.

The sealing cover 23 and the shaft sleeve 32 are made of 1Cr18Ni9Ti stainless steel.

The bearing bracket 14, the gland 46, the front gland 18 and the pump bracket 21 adopt HT25-47.

The dust cover 19 is made of material ZG1Cr18Ni9Ti.

The sealing gasket C58 is made of polytetrafluoroethylene, which has low friction and can resist methanol corrosion.

The material of the stud 24 is Cr18Ni12Mo2Ti, which has good corrosion resistance.

A sign is fixed on the adapter seat 28 by rivets.

The material used for each main part of the sleeve coupling is ZG45.

The working principle of the utility model is:

Rated parameters: flow 4m³/h, speed 2860r/min, motor power 1.85kw, shaft power 1.2kw, head 35m

The methanol pump uses the centrifugal force of impeller rotation to transport methanol, and discharges the residual liquid through the liquid discharge pipeline. The specific content is: the motor shaft is connected to the pump shaft through the coupling 7 to drive the pump shaft to rotate to generate power, and the claw coupling The characteristic is that the absorbable eccentric angle is large, which can weaken the influence of the radial runout of the shaft within a certain range, and can ensure the stable operation of the pump shaft. The shaft sleeve 32 is placed outside the pump shaft to reduce the pump shaft and the adapter seat. The friction of 28 also has a sealing effect. The impeller 34 is installed at the end of the pump shaft. The impeller is locked and sealed by the impeller back cap assembly 35. The pump shaft drives the impeller to rotate through the impeller key 36 to generate centrifugal force. Methanol flows in from the suction port 48, and the methanol is centrifuged through the impeller. Drive to flow out from the pressure outlet 49.

Due to gravity, when the impeller stops rotating, some methanol will remain at the bottom of the volute 33 and cannot be removed, and some solid particles will also be deposited here. Although the volute and other parts are made of anti-corrosion materials, after a long period of deposition The equipment may still be corroded. At this time, remove the nut that fixes the gland in the discharge pipeline, remove the gland to release the residual methanol through the pipeline, and tighten the gland after the discharge is completed. Continue to use to prevent methanol leakage. This discharge pipeline is a major advantage of the methanol pump. It can reuse the released methanol and reduce the corrosion rate of the equipment and prolong the service life of the equipment.

Claims (8)

1. A pump for supplying methanol, comprising a bearing bracket (14), characterized in that the bearing bracket (14) is connected to a pump bracket (21), and one end of the bearing bracket (14) is connected to the front gland (18 ), the pump casing is in contact with the front gland (18), the main shaft is set in the bearing bracket (14), one end of the main shaft passes through the front gland (18) and is located in the pump casing, the other end of the main shaft is connected to the sleeve coupling, the pump A power unit, a bearing mechanism and a sealing assembly are arranged between the shell and the bearing bracket (14); The power unit includes an impeller (34) connected to one end of the main shaft, the main shaft connected to one end of the impeller (34) is located in the pump casing, the impeller (34) is fixed on the main shaft through a matching back cap assembly (35), and the volute (33) There is a ○-shaped sealing ring A (25) between the pressure plate and the sealing cover (23), which is connected and fixed by a stud (24), and also includes a pipe joint (38) arranged on the sealing cover (23). ) and gasket, the other end of the welded assembly is the oil filter (59); The bearing mechanism includes a sealing ring (20) sleeved on the main shaft, which is located in the front and rear glands (9) of the bearing bracket (14), and the front gland (18) is provided with a dust cover (19). There is a ○-shaped sealing ring A (25) between the cover (18), the rear gland (9) and the bearing bracket (14); the end close to the impeller (34) is a single tapered roller bearing (16), the inner side and There is a retaining ring (15) between the bearing brackets (14), two deep groove ball bearings (12) at the other end, a retaining ring (15) and an adjusting ring (56) on the side close to the bearing box, and a retaining ring (15) and an adjusting ring (56) on the other side There is a thrust washer (55) and a back cap assembly to prevent axial sliding; an adjustment ring (56) is used to adjust the axial position of the bearing; a retaining ring (15), a thrust washer (55) and a bearing back cap (10) Used to limit the axial movement of the bearing, the gland (46) seals both ends of the bearing bracket, and the dust cover (19) can prevent dust from entering the inside of the bearing and affecting the operation of the bearing; The sealing assembly includes the shaft sleeve (32) outside the main shaft and the gasket A (11), the gasket A (11) is located at the contact interface between the impeller (34) and the main shaft sleeve; it also includes a mechanical seal (26) and mechanical The oil filter pipeline leading from the seal (26); The pump casing is respectively provided with a suction chamber (48) and a discharge chamber (49), the axes of the suction chamber (48) and the discharge chamber (49) are vertical, the suction chamber (48) is on the same axis as the main shaft, and the suction The inner walls of the chamber (48) and the extrusion chamber (49) are provided with threads, and the bottom of the volute (33) is provided with a liquid discharge pipeline (39), which can discharge the residual liquid in time; The sleeve coupling includes a pump shaft coupling (1) connected to the main shaft, the pump shaft coupling (1) is connected to one end surface of the coupling sleeve (3) through a pin, and the pin is coupled to the pump shaft There is an elastic ring between the joints, and the other end of the sleeve (3) is connected with a claw coupling (4) through a screw (2), and the other end of the claw coupling (4) is connected to the motor coupling (5) The coupling (7) is connected with the motor shaft by the motor coupling (5) through the key (8), the claw coupling (4) is connected with the coupling sleeve (3) through the screw (2), and the motor coupling The shaft joint (5) is connected with the coupling sleeve (3) through the screw (2), and the rubber block (6) fills the gap in the claw coupling (4); Lubricating oil is stored inside the bearing bracket (14), and there is a small hole on the upper wall of the bearing bracket (14) to install the air release plug (13). To balance the air pressure; the front wall of the bearing bracket (14) is installed with a plug B (51), and the rear wall is connected with a constant oil level device (50), through which the lubricating oil inside the bearing bracket can be observed the height of; The adapter seat (28) is connected between the volute (33) and the bearing bracket (14), and the sealing cover (23) is fixed with the adapter seat (28) by the double-ended stud (24) to play a sealing role , while the two plugs (27) can prevent methanol inside the volute from leaking through the gap; A mechanical seal (26) is used around the pump shaft, and a ○-shaped sealing ring A (25) is installed on the outside of the mechanical seal (26) for self-tight sealing, and the joint between the shaft sleeve (32) and the impeller (34) is designed as a right-angle interface , to increase the length of the gap, ○-shaped sealing ring B (29) is used to seal to prevent methanol leakage, the positioning pin (30) is used to fix the relative position of the volute gland (31) and the adapter seat (28), the volute pressure The cover has the function of sealing and connecting; The impeller (34) is connected with the pump shaft through the impeller key (36); the impeller back cap assembly (35) locks the impeller (34) on the pump shaft, and the front and back of the impeller (34) are respectively connected with the back cap assembly and the shaft. The sleeve-phase contact interface is designed to be at right angles instead of ordinary plane contact, increasing the length of the gap. The oil filter (59) is connected to the pipeline to the mechanical seal (26), and the oil inside it can fill the gap to prevent air leakage or Leakage; The pipe joint (38) is connected to the discharge pipeline 39 for releasing excess methanol, wherein the outer casing nut (40) is connected to the pipe joint (38), and the pipe sleeve (41) ensures the tightness of the connection. To prevent methanol leakage, the steel pipe (42) is the channel for methanol to flow out, the flange (44) and the gland (46) are connected by nuts (43) and bolts (47), and there is a gasket (45) in the middle to ensure the sealing. To prevent liquid leakage, the flange (44) is used to connect the steel pipe (42) and the gland (46) to make it tightly combined to form a detachable joint. When discharging the liquid, remove the gland to discharge the liquid. Then tighten the gland with bolts to continue to use. 2. A pump for replenishing methanol according to claim 1, characterized in that, the sealing cover (23) and the shaft sleeve (32) are made of 1Cr18Ni9Ti stainless steel. 3. A pump for supplying methanol according to claim 1, characterized in that the bearing bracket (14), gland (46), front gland (18) and pump bracket (21) Use HT25-47. 4. A pump for replenishing methanol according to claim 1, characterized in that, the dust cover (19) is made of material ZG1Cr18Ni9Ti. 5. A pump for supplying methanol according to claim 1, characterized in that the gasket C (58) is made of polytetrafluoroethylene, which has low friction and is resistant to methanol corrosion. 6. The pump for supplying methanol according to claim 1, characterized in that, the material of the stud (24) is Cr18Ni12Mo2Ti. 7. A pump for replenishing methanol according to claim 1, characterized in that, a label is fixed on the adapter base (28) by rivets. 8. A pump for replenishing methanol according to claim 1, characterized in that the material used for each main part of the sleeve coupling is ZG45.