CN212803612U - Fluoroplastic lining OH2 type single-stage single-suction chemical centrifugal pump - Google Patents

Abstract

The utility model discloses a fluoroplastics lining OH2 type single-stage single-suction chemical centrifugal pump, install in proper order backward in the past including impeller, pump shaft, standard base the last pump body of standard base, bearing box and motor, the impeller sets up in the pump body, the pump shaft rotates to be installed on the bearing box, the rear end of pump shaft with the output shaft of motor, open the front end of the pump body has the pump import, open the upper end of the pump body has the pump export, the pump import department of the pump body is connected with the inlet flange, the pump export department of the pump body is connected with the outlet flange, the inlet flange the outlet flange with the pump body adopts cast steel material integrated into one piece, the position of overflowing of the pump body is equipped with the fluoroplastics lining. The utility model discloses adopt cast steel material integrated into one piece with the pump body and advance, the export flange, advance, the export flange grade is high, has improved pump body intensity, and pressure increases on fluoroplastics lining shaping, and fluoroplastics lining's density is high, is difficult for the fracture, and the size shrink is stable.

Description

Fluoroplastic lining OH2 type single-stage single-suction chemical centrifugal pump

Technical Field

The utility model relates to a centrifugal pump field, specifically speaking relate to a fluoroplastics lining OH2 type single-stage single-suction chemical centrifugal pump.

Background

The centrifugal pump has wide application range, diversified structural forms and functions, and has the advantages and disadvantages existing in market use and verification for a long time, wherein for conveying strong-corrosive acid, alkali and salt media, the parts mainly contacting with fluid are fluoroplastic or fluoroplastic alloy, and most of the structural forms of the centrifugal pump adopt a footing mounting mode; the pump body structure adopts an iron casting material lined with fluoroplastic, so that the strength of the casting material is low on the whole, casting defects are easy to occur, the casting deformation is large, appearance identification is difficult to form in casting, the cost is correspondingly increased when the flange grade requirement is high, the use of a high-pressure grade working condition is difficult to ensure, the structural form and oil seal sealing of the traditional bearing box are easy to cause the phenomena of bearing box heating and bearing box oil leakage; there are some improvements to the overall.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a fluoroplastics lining OH2 type single-stage single-suction chemical centrifugal pump that pump body intensity is high, fluoroplastics lining is difficult for fracture is provided.

In order to solve the technical problem, the utility model discloses a following technical scheme: the utility model provides a fluoroplastics lining OH2 type single-stage single-suction chemical centrifugal pump, includes impeller, pump shaft, standard base and installs in proper order backward in the past pump body, bearing box and motor on the standard base, the impeller sets up in the pump body, the pump shaft rotates to be installed on the bearing box, the rear end of pump shaft with the output shaft of motor, the front end of pump shaft penetrates in the pump body with the impeller is connected, the front end of the pump body is opened there is the pump import, the upper end of the pump body is opened there is the pump export, the pump import department of the pump body is connected with the inlet flange, the pump export flange of the pump body is connected with the outlet flange, the inlet flange the outlet flange with the pump body adopts cast steel material integrated into one piece, the position of overflowing of the pump body is equipped with the fluoroplastic.

Furthermore, the rear end of the pump shaft extends out of the bearing box, the rear end of the pump shaft is connected with an output shaft of the motor through a double-diaphragm coupling, and an open type protective cover covers the double-diaphragm coupling.

Furthermore, a discharge hole is formed in the lower end of the pump body, a discharge elbow joint extending forwards is connected to the discharge hole, and a discharge ball valve is connected to the front end of the discharge elbow joint.

Further, the pump spindle sleeve is sleeved with the fluorine lining shaft sleeve, the fluorine lining shaft sleeve is sleeved with the integrated type double-end-face mechanical seal, the rear end of the pump body is connected with the mechanical seal gland, the integrated type double-end-face mechanical seal is clamped between the rear end of the pump body and the mechanical seal gland, and the fluorine lining shaft sleeve and the impeller are provided with shaft sleeve sealing rings.

Further, the pump body covers behind the pump, it has the pump shaft hole of stepping down to cover to open behind the pump, the pump shaft hole of stepping down's front end is preceding big back little horn mouth form to form and prevent the deposit slope.

Further, the pump body covers behind the pump including, it has the pump shaft hole of stepping down to cover to open behind the pump, the front end of lid is opened behind the pump have with the backward flow inclined hole that the hole intercommunication was stepped down to the pump shaft.

Furthermore, the rear end of the bearing box is connected with a labyrinth bearing gland, and the rear end of the labyrinth bearing gland is connected with a dustproof gland.

Furthermore, a tortoise-shell net is welded at the overflowing part of the pump body and is provided with a dovetail groove and/or a reinforcing hole, and the fluoroplastic lining is filled into the dovetail groove and/or the reinforcing hole and coats the tortoise-shell net.

Furthermore, the impeller is composed of an impeller insert made of cast steel and a fluoroplastic layer coated outside the impeller insert.

Further, the pump body is supported by the central line of type OH2 of the API610 standard.

The beneficial effects of the utility model are embodied in:

the pump body and the inlet and outlet flanges are integrally formed by cast steel, the grade of the inlet and outlet flanges is high, the strength of the pump body is improved, the pressure on the forming of the fluoroplastic lining is increased, the pump body is not easy to deform and crack, the density of the fluoroplastic lining is high, the pump body is not easy to crack, and the size shrinkage is stable; the utility model discloses manufacturing process is simple, is convenient for make, and cost of maintenance reduces, has improved the yield greatly on forming process, has very good application prospect.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a left side view of fig. 1.

Fig. 3 is a schematic view of the structure of the pump body of fig. 1.

Fig. 4 is a schematic structural diagram of a pump rear cover according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a pump rear cover according to another embodiment of the present invention.

The components in the drawings are labeled as follows:

1 standard base, 2 pump bodies, 21 pump inlets, 22 pump outlets, 23 discharge ports, 24 inlet flanges, 25 outlet flanges, 26 discharge elbow joints, 27 discharge ball valves, 28 fluoroplastic linings, 29 dovetail grooves, 210 pump rear covers, 211 pump shaft abdicating holes, 212 backflow inclined holes, 213 anti-deposition slopes, 214 connecting pipe interfaces, 3 bearing boxes, 31 labyrinth bearing glands, 32 dust-proof glands, 4 motors, 5 impellers, 51 locking nuts, 52 impeller nuts, 6 pump shafts, 61 fluorine-lined shaft sleeves, 62 container type double-end-face machine seals, 63 machine seal glands, 7 double-diaphragm couplings and 8 open type protective covers.

Detailed Description

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

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, "a plurality" means two or more. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

See fig. 1-5.

The utility model discloses a fluoroplastic lining OH2 type single-stage single-suction chemical centrifugal pump, which comprises an impeller 5, a pump shaft 6, a standard base 1, a pump body 2, a bearing box 3 and a motor 4 which are sequentially arranged on the standard base 1 from front to back, the impeller 5 is arranged in the pump body 2, the pump shaft 6 is rotatably mounted on the bearing box 3, the rear end of the pump shaft 6 is connected with an output shaft of the motor 4, the front end of the pump shaft 6 penetrates into the pump body 2 to be connected with the impeller 5, the front end of the pump body 2 is provided with a pump inlet 21, the upper end of the pump body 2 is provided with a pump outlet 22, an inlet flange 24 is connected at the pump inlet 21 of the pump body 2, an outlet flange 25 is connected at the pump outlet 22 of the pump body 2, the inlet flange 24, the outlet flange 25 and the pump body 2 are integrally formed by cast steel, and a fluoroplastic lining 28 is arranged at the overflowing part of the pump body 2.

The utility model discloses adopt cast steel material integrated into one piece with the pump body and advance, the export flange, advance, the export flange grade is high, has improved pump body intensity, and pressure increases on fluoroplastics lining shaping, and non-deformable ftractures, and fluoroplastics lining's density is high, and difficult fracture, size shrink is stable.

In one embodiment, the rear end of the pump shaft 6 extends out of the bearing box 3, the rear end of the pump shaft 6 is connected with the output shaft of the motor 4 through a double-diaphragm coupling 7, and an open-type protective cover 8 covers the double-diaphragm coupling 7. By the design, the connection between the pump shaft and the output shaft of the motor is stable and reliable, the coaxiality is high, and the use process is more stable.

In one embodiment, the lower end of the pump body 2 is provided with a discharge opening 23, the discharge opening 23 is connected with a discharge elbow 26 extending forwards, and the front end of the discharge elbow 26 is connected with a discharge ball valve 27. Design like this, can follow drain hole discharge defective material and wash the water, simple structure, through blowing ball valve control switch, convenient operation.

In one embodiment, a hexmetal is welded at the flow passage part of the pump body 2 and is provided with a dovetail groove 29 and/or a reinforcing hole, and the fluoroplastic lining 28 is filled in the dovetail groove 29 and/or the reinforcing hole and covers the hexmetal. By the design, the adhesive force of the fluoroplastic lining can be enhanced, and the fluoroplastic lining is not easy to fall off under the working condition with large temperature difference.

In one embodiment, the impeller 5 is composed of an impeller insert made of cast steel and a fluoroplastic layer covering the impeller insert. Design like this, the impeller adopts split type structure, and the organism is cast steel's impeller inserts, outsourcing fluoroplastics layer, simple structure, light in weight, intensity is high, all corrosion resistant strong acid strong bases.

In a specific implementation, the impeller 5 is mounted on the pump shaft through a lock nut 51 and an impeller nut 52. The anti-rotation snap ring is not easy to loosen and runs reliably and stably.

In an embodiment, a fluorine lining shaft sleeve 61 is sleeved outside the pump shaft 6, an integrated type double-end mechanical seal 62 is sleeved outside the fluorine lining shaft sleeve 61, a mechanical seal pressing cover 63 is connected to the rear end of the pump body 2, the integrated type double-end mechanical seal 62 is clamped between the rear end of the pump body 2 and the mechanical seal pressing cover 63, and a shaft sleeve sealing ring is installed between the fluorine lining shaft sleeve 61 and the impeller 5. By the design, the fluorine-lined shaft sleeve plays a role in corrosion resistance, the integrated double-end face machine seal is used for sealing the pump body, the pump shaft and the machine seal gland, and the sealing ring is used for preventing materials from entering the impeller and the pump shaft and ensuring the corrosion resistance effect.

In an embodiment, the pump body 2 includes a pump rear cover 210, the pump rear cover 210 has a pump shaft relief hole 211, and the front end of the pump rear cover 210 has a backflow inclined hole 212 communicating with the pump shaft relief hole 211. By the design, after the pump runs, the pump seal can be flushed through the backflow inclined hole circulation flushing machine, and the pump seal is suitable for various working conditions.

In an embodiment, the pump body 2 includes a pump rear cover 210, the pump rear cover 210 has a pump shaft relief hole 211, and a front end of the pump shaft relief hole 211 is in a bell mouth shape with a large front and a small rear to form an anti-deposition slope 213. By the design, when some substances with particles and easy crystallization are conveyed, the substances are not easy to scale or deposit at the positions during operation or shutdown, so that the medium at the sealing positions can be circulated, and the sealing cannot fail and leak due to blockage.

In one embodiment, a labyrinth bearing cover 31 is connected to the rear end of the bearing housing 3, and a dust cover 32 is connected to the rear end of the labyrinth bearing cover 31. By the design, the sealing and dust prevention can be effectively realized.

In one embodiment, the pump body 2 is supported using the centre line of type OH2 of the API610 standard. By the design, the pump body is stably and reliably supported.

In one embodiment, the front end of the bearing housing 3 is integrally formed with an intermediate bracket, and the intermediate bracket is connected to the pump body. By the design, the bearing box and the support are of an integral structure, so that the bearing box is easier to manufacture, and the installation accuracy of the bearing box and the support does not need to be considered.

In one embodiment, the upper end of the pump body 2 may be provided with a connection pipe interface 214 for interfacing with various sealing schemes.

In a specific implementation, the pump is mounted within the range of a standard base. Other overflowing parts contacting with materials can be provided with fluoroplastic layers to ensure the anti-corrosion effect, a sealing ring can be arranged between two other connected parts for sealing, and the pump body, the bearing box and the motor can be directly fixed on the standard base and can also be fixed on the standard base through a supporting plate.

It should be understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the present invention, and that various modifications or changes in light thereof will be suggested to persons skilled in the art and are to be included within the spirit and purview of this application.

Claims (10)

1. A fluoroplastic lining OH2 type single-stage single-suction chemical centrifugal pump is characterized in that: install in proper order after including impeller, pump shaft, standard base and the past in the past pump body, bearing box and the motor on the standard base, the impeller sets up in the pump body, the pump shaft rotates to be installed on the bearing box, the rear end of pump shaft with the output shaft of motor, the front end of pump shaft penetrates in the pump body with the impeller is connected, the front end of the pump body is opened there is the pump import, the upper end of the pump body is opened there is the pump export, the pump import department of the pump body is connected with the import flange, the pump export department of the pump body is connected with the export flange, the import flange with the pump body adopts cast steel material integrated into one piece, the position of overflowing of the pump body is equipped with the fluoroplastics lining.

2. A fluoroplastic lined single stage, single suction chemical centrifugal pump of type OH2, according to claim 1, wherein: the rear end of the pump shaft extends out of the bearing box, the rear end of the pump shaft is connected with an output shaft of the motor through a double-diaphragm coupling, and an open type protective cover is covered outside the double-diaphragm coupling.

3. A fluoroplastic lined single stage, single suction chemical centrifugal pump of type OH2, according to claim 1 or claim 2, wherein: the lower extreme of the pump body is opened there is the drain hole, drain hole department is connected with the blowing elbow fitting that stretches out forward, the front end of blowing elbow fitting is connected with the blowing ball valve.

4. A fluoroplastic lined single stage, single suction chemical centrifugal pump of type OH2, according to claim 1 or claim 2, wherein: the pump spindle is sleeved with a fluorine lining shaft sleeve, the fluorine lining shaft sleeve is sleeved with a container type double-end-face mechanical seal, the rear end of the pump body is connected with a mechanical seal gland, the container type double-end-face mechanical seal is clamped at the rear end of the pump body and between the mechanical seal glands, and a shaft sleeve sealing ring is installed between the fluorine lining shaft sleeve and the impeller.

5. A fluoroplastic lined single stage, single suction chemical centrifugal pump of type OH2, according to claim 1 or claim 2, wherein: the pump body covers behind the pump, it has the pump shaft hole of stepping down to cover to open behind the pump, the pump shaft front end in hole of stepping down is preceding big back little horn mouth form to form and prevent deposiing the slope.

6. A fluoroplastic lined single stage, single suction chemical centrifugal pump of type OH2, according to claim 1 or claim 2, wherein: the pump body covers after including the pump, it has the pump shaft hole of stepping down to cover to open behind the pump, the front end of lid is opened behind the pump have with the backward flow inclined hole of pump shaft hole intercommunication of stepping down.

7. A fluoroplastic lined single stage, single suction chemical centrifugal pump of type OH2, according to claim 1 or claim 2, wherein: the rear end of the bearing box is connected with a labyrinth bearing gland, and the rear end of the labyrinth bearing gland is connected with a dustproof gland.

8. A fluoroplastic lined single stage, single suction chemical centrifugal pump of type OH2, according to claim 1 or claim 2, wherein: the overflow part of the pump body is welded with a tortoise-shell net and is provided with a dovetail groove and/or a reinforcing hole, and the fluoroplastic lining is filled into the dovetail groove and/or the reinforcing hole and coats the tortoise-shell net.

9. A fluoroplastic lined single stage, single suction chemical centrifugal pump of type OH2, according to claim 1 or claim 2, wherein: the impeller is composed of an impeller insert made of cast steel and a fluoroplastic layer coated outside the impeller insert.

10. A fluoroplastic lined single stage, single suction chemical centrifugal pump of type OH2, according to claim 1 or claim 2, wherein: the pump body is supported by adopting an OH2 type central line of API610 standard.

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