CN113323882A

CN113323882A - Prevent blocking mortar pump based on floating housing

Info

Publication number: CN113323882A
Application number: CN202110546373.9A
Authority: CN
Inventors: 王培娟
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2021-08-31

Abstract

The invention belongs to the technical field of pump bodies, and particularly relates to an anti-blocking mortar pump based on a floating shell, which comprises a motor, a mounting frame, an impeller, a shell and a rotating shaft, wherein the motor is arranged on the mounting frame; according to the mortar pump, the shell is radially and movably connected with the mounting frame, so that the shell and the impeller can move relatively in the radial direction, when aggregate in a mixture is clamped between the shell and the impeller, the shell can move relative to the impeller, a gap between the shell and the impeller at the material clamping position is increased, the aggregate can pass through the clamping position, the mortar pump is prevented from being clamped, the mortar pump is prevented from being overloaded, the mortar pump is prevented from being damaged due to overload, and the service life of the mortar pump is prolonged.

Description

Prevent blocking mortar pump based on floating housing

Technical Field

The invention belongs to the technical field of pump bodies, and particularly relates to an anti-blocking mortar pump based on a floating shell.

Background

The mortar pump belongs to a cantilever type single-stage single-suction centrifugal pump, is designed and developed for conveying corrosive media containing fine particles, is made of steel-lined ultra-high molecular weight polyethylene, is a latest generation of corrosion-resistant and wear-resistant engineering plastic for the pump, and has the most outstanding advantages of excellent wear resistance, impact resistance (particularly low-temperature impact resistance), creep resistance (environmental stress cracking resistance) and excellent corrosion resistance in all plastics; the main properties are as follows: 1. corrosion and abrasion resistance, one pump is multipurpose, and the acid and alkali clear liquid slurry is suitable for use; 2. the pump body is of a steel lining ultra-high molecular weight polyethylene structure, the thickness of the lining is 8-20 mm, and the pump applies a plastic lining patent technology and has the advantages of good heat deformation resistance of the lining layer, cracking resistance, falling prevention, high use temperature and the like compared with other similar pumps; 3. the impeller is divided into two types, namely closed type and optional type according to the medium condition; 4. sealing: k-type dynamic seal, K1-type dynamic seal, T-type packing seal, T1-type packing seal and C3-type non-standard seal; 5. suitable media are: sulfuric acid with the concentration of below 80 percent, nitric acid with the concentration of below 50 percent, hydrochloric acid with various concentrations and liquid alkali, which are suitable for clear liquid and slurry; 4. the main technical parameters are as follows: the use temperature is-20 to 90 ℃ (the use temperature can be increased to more than 100 ℃ by using the modified material), the inlet diameter is 32 to 350mm, the flow is 5 to 2600m3/h, and the lift is within 80 m.

The mortar pump is mainly used for pumping the mixture such as the sand, and the like, because the particle sizes of the aggregates in the mixture are different, if the aggregates with larger particle sizes exist in the mixture in the pumping process, the aggregates are blocked in a gap between an impeller and a shell in the mortar pump to seal, thereby leading to the blockage of the impeller and the blockage of the mortar pump, further leading to the overload of the mortar pump, thereby causing the mortar pump to be damaged and further causing the service life of the mortar pump to be shortened, thereby enabling the shell to move relative to the impeller and further increasing the gap between the shell and the impeller at the material clamping position, and then make the aggregate can be through the dead position of card, and then prevent that the card of mortar pump is dead, and then block the clearance between impeller and casing when solving when carrying mortar mixture when the aggregate is great, and then lead to the impeller card to die and make mortar pump overloaded's problem.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention provides an anti-blocking mortar pump based on a floating shell. The mortar pump mainly solves the problem that when the aggregate is large during mortar mixture conveying, the aggregate is clamped in a gap between the impeller and the shell, so that the impeller is clamped, and a mortar pump is overloaded.

The technical scheme adopted by the invention for solving the technical problems is as follows: an anti-blocking mortar pump based on a floating shell comprises a motor, a mounting frame, an impeller, a shell and a rotating shaft; one end of the motor is arranged on the mounting rack; the mounting rack is fixedly connected with the motor; the rotating shaft is arranged at one end of the output shaft of the motor; the rotating shaft is connected with an output shaft of the motor; the impeller is arranged at one end of the output shaft of the motor; the impeller is fixedly connected with the rotating shaft; a shell is arranged outside the impeller; the shell is radially and movably connected with the mounting frame; the shell is sealed with the mounting rack.

When the mortar pump works, the mortar pump is mainly used for pumping mixture such as gravel and the like, and due to different particle sizes of aggregates in the mixture, if aggregates with larger particle sizes exist in the mixture in the pumping process, the aggregates are blocked in a gap between the impeller and the shell in the mortar pump, so that the impeller is blocked, the mortar pump is overloaded, the mortar pump is damaged, and the service life of the mortar pump is shortened; through radially active link casing and mounting bracket in this scheme, and then make casing and impeller can relative movement in radial direction, and then when the aggregate card in the mixture was between casing and impeller, the casing impeller can remove relatively, and then make the clearance increase between the casing of card material position and the impeller, and then make the aggregate can be through the dead position of card, and then prevent that the card of mortar pump is dead, and then prevent that the overload's condition from appearing in the mortar pump, and then prevent the damage that the mortar pump caused because of overloading, and then increased the life of mortar pump.

Preferably, one end of the mounting rack close to the shell is connected with one side surface of the shell in a sliding manner; a groove is formed in one end, close to the shell, of the mounting rack; a sealing ring is arranged in the groove; the sealing ring is abutted against one side surface of the shell; the outer part of the shell is uniformly provided with fixed seats at intervals; the fixed seat is fixedly connected with the shell; a pressing plate is arranged on one side surface of the fixed seat; the pressing plate is fixedly connected with the fixed seat through a bolt; one side surface of the pressing plate close to the fixed seat is abutted against one side surface of the boss on the mounting frame; the reset springs are uniformly arranged outside the mounting rack at intervals, and one ends of the reset springs are fixedly connected with the mounting rack; the other end of the reset spring is fixedly connected with the pressing plate.

When the mortar pump works, when aggregate is clamped between the shell and the impeller in the mortar pump, the impeller has a tendency of continuously rotating under the driving of the motor, and further the impeller exerts force on the aggregate, because the impeller has a tendency of outwards stirring the aggregate, the force exerted on the aggregate by the impeller has a radial component force, and further the aggregate exerts a radial force on the shell, because the shell is in sliding connection only in the radial direction relative to the mounting rack, the shell has a degree of freedom only in the radial direction relative to the mounting rack, and further when the shell is subjected to a radial external force, the shell moves along the direction of the force, so that the gap between the shell and the impeller close to the position where the aggregate is clamped is increased, further the aggregate can smoothly pass through the gap between the impeller and the shell, further the aggregate can be smoothly pumped out, and further the mortar pump is prevented from being clamped, the condition of overload of the mortar pump is prevented, the mortar pump is prevented from being damaged due to overload, and the service life of the mortar pump is prolonged; because casing and impeller are the solid of revolution, and then when the casing radially produces the removal, and then lead to the central line axis skew of casing and impeller, and then lead to the clearance increase of impeller and casing one side, the clearance of opposite side reduces, and then lead to the easy card of one side that reduces to die, through the reset spring who sets up in this scheme, and then make the aggregate be in the same direction as unblocked back at the casing radial migration, under the spring action through reset spring, and then make the casing resume not to appear the dead condition of aggregate card, and then make the axis of casing coincide with the axis of impeller, and then make casing and impeller clearance in the circumference within range always, and then prevent the dead condition of aggregate card that the clearance size differs from appearing, and then reduce the dead condition of aggregate card, and then reduce the dead probability of mortar pump card, and then increase the life of mortar pump.

Preferably, a feeding pipe is arranged on one side of the feeding hole of the shell; the feeding pipe is fixedly connected with the shell through a bolt; the feed pipe is a rigid pipe.

When the mortar pump works, the mixture is thrown out under the centrifugal action due to the action of the impeller and then impacts the shell when moving in the shell in the using process, the particle sizes of aggregates in the mixture are different, and then the impact of the mixture on the shell is different, so that the shell is in a radial shaking state when the mortar pump works, and meanwhile, the conveyed mortar mixture is in the process of coagulation all the time in the conveying process, so that mortar is gradually coagulated and stuck on the pipe wall of the feeding pipe when the mortar pump is conveyed for a long time, the blockage of the feeding pipe is caused, and the conveying efficiency of the mortar pump is reduced; consequently through setting the inlet pipe to the rigid pipe in this scheme, and then along with rocking of casing, and then make the inlet pipe be in the state of rocking, and then make the mortar mixture be in the state of vibrations, and then prevent that the material from condensing and gluing on the inner wall of inlet pipe, and then make inside the smooth and easy entering into casing of mortar mixture, and then prevent the jam of inlet pipe, and then prevent the reduction of the pumping efficiency that leads to along with the increase of pumping time, and then guaranteed the transport efficiency of mortar pump.

Preferably, an anti-blocking part is arranged between the output shaft of the motor and the rotating shaft; the anti-blocking component is used for preventing the output shaft of the motor from being blocked.

When the motor works, a motor bearing is heated when the motor runs in an overload mode, the service life is shortened, contacts of a contactor and a circuit breaker are heated when a control element and a circuit run in an overload mode for a long time, the service life is shortened, and the contacts are burnt out when the contacts are serious; secondly, the motor is overloaded for a long time, so that the current of the motor exceeds a rated value for a long time, the indexes of the temperature of a motor winding, the shaft temperature and the like are increased to exceed a normal allowable value, the motor is heated seriously, and the motor is damaged if the indexes are serious; if when entering into the inside mixture of casing and containing too big building stones, can lead to the dead possibility of output shaft card, through the anti-sticking who sets up parts that dies in this scheme, make flexonics between the output shaft of pivot and motor, and then when the output shaft is blocked, through the anti-sticking who sets up parts that dies, and then make the break-make of being connected of motor output shaft and pivot time, and then prevent that the motor output shaft from being blocked and die, and then prevent the motor overload, and then prevent that the motor from causing the damage because of transshipping, and then increase the life of motor.

Preferably, one end of an output shaft of the motor is provided with the connecting piece; one end of the connecting piece is fixedly connected with the output shaft of the motor; the other end of the connecting piece is uniformly provided with sliding chutes at intervals; the limiting spring is arranged inside the sliding groove; one end of the limiting spring is fixedly connected with the connecting piece; the other end of the limiting spring is provided with a stop block; the stop block is connected with the sliding groove in a sliding manner; one end of the stop block is fixedly connected with the limiting spring; a through groove is formed in one end of the rotating shaft; one end of the connecting piece is positioned in the through groove; the through groove is internally provided with clamping grooves at uniform intervals.

During working, the overload condition of the whole circuit is monitored in the connecting circuit of the motor in most of the existing overload protection methods, so that the overload protection of the motor is realized, and because the method carries out corresponding response by indirectly detecting the overload condition of the circuit, more intermediate processes result in long response time, meanwhile, the reliability of an electric control product is poorer relative to the mechanical structure, and the cost of adding monitoring and control elements in the circuit of the motor is higher, so that the use cost of equipment is increased; in the scheme, one end of the baffle is positioned in the clamping groove and the other end of the baffle is positioned in the sliding groove under normal conditions, so that the degree of freedom between two pieces and between the pieces and the rotating shaft in the rotating direction is limited, the torsion output by the motor can be smoothly transmitted to the rotating shaft, the impeller is driven to rotate, and the power transmission of the mortar pump is smooth; when the rotating shaft is blocked, the motor still outputs torsion under the condition of no power failure at the moment, so that the motor output shaft and the connecting piece continue to rotate, and the rotating shaft is blocked, so that the stop block slides along the side wall of the clamping groove under the condition that the motor torsion continues to be output, so that the stop block slides into the sliding groove, the rotating shaft and the connecting piece can relatively rotate in the rotating direction, a power transmission path between the motor and the rotating shaft is cut off, the motor is prevented from being blocked, the motor is prevented from being overloaded, and the service life of the motor is prolonged; in the scheme, the transmission path disconnection of the motor and the load end force is realized through a mechanical structure, so that the overload protection of the motor is realized, the structure is simpler, and compared with parts required by control such as an electric part, a controller and the like, the cost is lower; in the scheme, a connecting piece is arranged between the motor and the rotating shaft; and then make the great volume of formation of pivot department, and then have great inertia at pivot and connecting piece department at the pivoted in-process, and then when the impeller slightly blocks the pause, make the impeller rotate the card pause department through the inertia of pivot and connecting piece department, and then prevent to block between impeller and the casing.

Preferably, the cross-sectional length of the groove is greater than the cross-sectional diameter of the seal ring.

The during operation, because at the in-process of mortar work, the casing can produce for the mounting bracket and slide, and then can make the sealing washer receive the power that the slip produced, and then make the sealing washer appear rubbing and warp, through the cross-sectional diameter who is greater than the sealing washer with recess cross-sectional length setting, and then make the sealing washer can have certain removal space in the recess, and then when the sealing washer receives extrusion deformation, make the sealing washer can have the required space of deformation, and then make the sealing washer can keep better gesture when receiving rubbing, and then prevent the damage that the sealing washer leads to because of rubbing, and then increase the life of sealing washer, and then increased the life of mortar pump.

Preferably, the pressing plate is provided with a ring groove; balls are arranged in the ring grooves at intervals; the ball contacts with a side face of the boss on the mounting frame.

When the device works, when the shell moves in the radial direction, the shell and the mounting frame move relatively, and the pressing plate and the mounting frame also move relatively, so that the friction resistance is large, and the shell moves unsmoothly; through the ball that sets up, and then with the friction form between clamp plate and the mounting bracket, change rolling friction into by sliding friction, and then make the frictional resistance between clamp plate and the mounting bracket reduce, and then make the resistance that the casing removed reduce, and then the casing of being convenient for is at radial ascending removal, and then prevents that the card of impeller from dying, and then prevents the mortar pump because of the damage that the overload caused, and then has increased the life of mortar pump.

Preferably, hooks are arranged at two ends of the return spring; the hook is fixedly connected with the return spring; one hook is fixedly connected with the mounting frame through a bolt; the other hook is fixedly connected with the pressure plate through a bolt.

When the device works, the installation is unchanged because the gap between the installation frame and the side wall of the pressure plate is small and two sides of the reset spring need to be fixedly connected; through the couple that sets up, and then extend reset spring's fixed point to between mounting bracket and the clamp plate outside the clearance, and then just have and use the bolt to fix reset spring, and then make reset spring's installation more convenient.

The invention has the following beneficial effects:

1. the mortar pump is mainly used for pumping the mixture such as sand and stone, and the like, and due to different particle sizes of the aggregates in the mixture, if the aggregates with larger particle sizes exist in the mixture in the pumping process, the aggregates are clamped in a gap between an impeller and a shell in the mortar pump, so that the impeller is clamped, the mortar pump is overloaded, the mortar pump is damaged, and the service life of the mortar pump is shortened; through radially active link casing and mounting bracket in this scheme, and then make casing and impeller can relative movement in radial direction, and then when the aggregate card in the mixture was between casing and impeller, the casing impeller can remove relatively, and then make the clearance increase between the casing of card material position and the impeller, and then make the aggregate can be through the dead position of card, and then prevent that the card of mortar pump is dead, and then prevent that the overload's condition from appearing in the mortar pump, and then prevent the damage that the mortar pump caused because of overloading, and then increased the life of mortar pump.

2. When aggregate is clamped between the shell and the impeller in the mortar pump, the impeller tends to continuously rotate under the driving of the motor, so that the impeller exerts force on the aggregate, the impeller tends to stir the aggregate outwards, the force exerted on the aggregate by the impeller has radial component force, the aggregate further exerts radial force on the shell, the shell is in sliding connection only in the radial direction relative to the mounting rack, the shell has freedom degree only in the radial direction relative to the mounting rack, the shell further moves along the direction of the force when the shell is subjected to the radial external force, the gap between the shell and the impeller close to the position where the aggregate is clamped is increased, the aggregate can smoothly pass through the gap between the impeller and the shell, the aggregate can be smoothly pumped out, and the mortar pump is prevented from being clamped, the condition of overload of the mortar pump is prevented, the mortar pump is prevented from being damaged due to overload, and the service life of the mortar pump is prolonged; because casing and impeller are the solid of revolution, and then when the casing radially produces the removal, and then lead to the central line axis skew of casing and impeller, and then lead to the clearance increase of impeller and casing one side, the clearance of opposite side reduces, and then lead to the easy card of one side that reduces to die, through the reset spring who sets up in this scheme, and then make the aggregate be in the same direction as unblocked back at the casing radial migration, under the spring action through reset spring, and then make the casing resume not to appear the dead condition of aggregate card, and then make the axis of casing coincide with the axis of impeller, and then make casing and impeller clearance in the circumference within range always, and then prevent the dead condition of aggregate card that the clearance size differs from appearing, and then reduce the dead condition of aggregate card, and then reduce the dead probability of mortar pump card, and then increase the life of mortar pump.

3. In the invention, in the using process, when the mixture moves in the shell, the mixture is thrown out under the centrifugal action and then impacts the shell due to the action of the impeller, the particle sizes of aggregates in the mixture are different, and further the impact of the mixture on the shell is different, so that the shell is in a radial shaking state when the mortar pump works, and meanwhile, the conveyed mortar mixture is in the process of coagulation all the time in the conveying process, so that when the mortar mixture is conveyed for a long time, mortar is gradually coagulated and stuck on the pipe wall of the feeding pipe, the blockage of the feeding pipe is further caused, and the conveying efficiency of the mortar pump is further reduced; consequently through setting the inlet pipe to the rigid pipe in this scheme, and then along with rocking of casing, and then make the inlet pipe be in the state of rocking, and then make the mortar mixture be in the state of vibrations, and then prevent that the material from condensing and gluing on the inner wall of inlet pipe, and then make inside the smooth and easy entering into casing of mortar mixture, and then prevent the jam of inlet pipe, and then prevent the reduction of the pumping efficiency that leads to along with the increase of pumping time, and then guaranteed the transport efficiency of mortar pump.

4. The motor can cause the heating of a motor bearing when in overload operation, the service life is shortened, the long-time overload operation of a control element and a circuit can cause the heating of contacts of a contactor and a circuit breaker, the service life is shortened, and the contact burning is caused when the contact burning is serious; secondly, the motor is overloaded for a long time, so that the current of the motor exceeds a rated value for a long time, the indexes of the temperature of a motor winding, the shaft temperature and the like are increased to exceed a normal allowable value, the motor is heated seriously, and the motor is damaged if the indexes are serious; if when entering into the inside mixture of casing and containing too big building stones, can lead to the dead possibility of output shaft card, through the anti-sticking who sets up parts that dies in this scheme, make flexonics between the output shaft of pivot and motor, and then when the output shaft is blocked, through the anti-sticking who sets up parts that dies, and then make the break-make of being connected of motor output shaft and pivot time, and then prevent that the motor output shaft from being blocked and die, and then prevent the motor overload, and then prevent that the motor from causing the damage because of transshipping, and then increase the life of motor.

5. The existing overload protection is realized by monitoring the overload condition of the whole circuit in the connecting circuit of the motor, and the method carries out corresponding response by indirectly detecting the overload condition of the circuit, so that the response time is long, meanwhile, the reliability of an electric control product is poorer than that of a mechanical structure, and the cost of adding monitoring and control elements in the circuit in which the motor operates is higher, so that the use cost of equipment is increased; in the scheme, one end of the baffle is positioned in the clamping groove and the other end of the baffle is positioned in the sliding groove under normal conditions, so that the degree of freedom between two pieces and between the pieces and the rotating shaft in the rotating direction is limited, the torsion output by the motor can be smoothly transmitted to the rotating shaft, the impeller is driven to rotate, and the power transmission of the mortar pump is smooth; when the rotating shaft is blocked, the motor still outputs torsion under the condition of no power failure at the moment, so that the motor output shaft and the connecting piece continue to rotate, and the rotating shaft is blocked, so that the stop block slides along the side wall of the clamping groove under the condition that the motor torsion continues to be output, so that the stop block slides into the sliding groove, the rotating shaft and the connecting piece can relatively rotate in the rotating direction, a power transmission path between the motor and the rotating shaft is cut off, the motor is prevented from being blocked, the motor is prevented from being overloaded, and the service life of the motor is prolonged; in the scheme, the transmission path disconnection of the motor and the load end force is realized through a mechanical structure, so that the overload protection of the motor is realized, the structure is simpler, and compared with parts required by control such as an electric part, a controller and the like, the cost is lower; in the scheme, a connecting piece is arranged between the motor and the rotating shaft; and then make the great volume of formation of pivot department, and then have great inertia at pivot and connecting piece department at the pivoted in-process, and then when the impeller slightly blocks the pause, make the impeller rotate the card pause department through the inertia of pivot and connecting piece department, and then prevent to block between impeller and the casing.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a schematic view of the overall construction of the mortar pump of the present invention;

FIG. 2 is an exploded view of the mortar pump of the present invention;

FIG. 3 is a schematic view of a first internal construction of the slurry pump of the present invention;

FIG. 4 is a schematic view showing the internal structure of the anti-seize member according to the present invention;

FIG. 5 is a second internal construction schematic of the mortar pump of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 5 at A;

FIG. 7 is a schematic view of the mounting structure of the return spring according to the present invention;

FIG. 8 is an exploded view of the deadlocking part of the present invention;

in the figure: the device comprises a motor 1, a mounting frame 2, an impeller 3, a shell 4, a rotating shaft 5, a groove 6, a sealing ring 7, a fixed seat 8, a pressing plate 9, a return spring 10, a feeding pipe 11, an anti-blocking part 12, a connecting piece 13, a sliding groove 14, a limiting spring 15, a stop block 16, a through groove 17, a clamping groove 18, an annular groove 19, a ball 20 and a hook 21.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 8, an anti-blocking mortar pump based on a floating shell comprises a motor 1, a mounting frame 2, an impeller 3, a shell 4 and a rotating shaft 5; one end of the motor 1 is provided with the mounting frame 2; the mounting frame 2 is fixedly connected with the motor 1; one end of an output shaft of the motor 1 is provided with the rotating shaft 5; the rotating shaft 5 is connected with an output shaft of the motor 1; one end of the output shaft of the motor 1 is provided with the impeller 3; the impeller 3 is fixedly connected with the rotating shaft 5; a shell 4 is arranged outside the impeller 3; the method is characterized in that: the shell 4 is radially and movably connected with the mounting frame 2; the housing 4 is sealed from the mounting frame 2.

When the mortar pump works, the mortar pump is mainly used for pumping mixture such as gravel and the like, and due to different particle sizes of aggregate in the mixture, if the aggregate with larger particle size exists in the mixture in the pumping process, the aggregate is clamped in a gap between the impeller 3 and the shell 4 in the mortar pump, so that the impeller 3 is clamped, the mortar pump is clamped, mortar is overloaded, the mortar pump is damaged, and the service life of the mortar pump is shortened; through with casing 4 and 2 footpath active links of mounting bracket in this scheme, and then make casing 4 and impeller 3 can the relative movement in radial direction, and then when the aggregate card in the mixture was between casing 4 and impeller 3, casing 4 relative impeller 3 can remove, and then make the clearance increase between casing 4 and the impeller 3 of card material position, and then make the aggregate can be through the dead position of card, and then prevent that the card of mortar pump from dying, and then prevent that the overload condition from appearing in the mortar pump, and then prevent the damage that the mortar pump caused because of overloading, and then the life of mortar pump has been increased.

As shown in fig. 1 to 8, one end of the mounting bracket 2 close to the housing 4 is slidably connected to one side of the housing 4; a groove 6 is formed in one end, close to the shell 4, of the mounting frame 2; a sealing ring 7 is arranged in the groove 6; the sealing ring 7 is abutted against one side surface of the shell 4; the outer part of the shell 4 is uniformly provided with fixed seats 8 at intervals; the fixed seat 8 is fixedly connected with the shell 4; a pressing plate 9 is arranged on one side surface of the fixed seat 8; the pressing plate 9 is fixedly connected with the fixed seat 8 through a bolt; one side surface of the pressing plate 9 close to the fixed seat 8 is abutted against one side surface of the boss on the mounting frame; the reset springs 10 are uniformly arranged outside the mounting rack at intervals, and one ends of the reset springs 10 are fixedly connected with the mounting rack; the other end of the return spring 10 is fixedly connected with the pressure plate 9.

When the mortar pump works, when aggregate is clamped between the shell 4 and the impeller 3 in the mortar pump, the impeller 3 tends to continuously rotate under the driving of the motor 1, and further the impeller 3 exerts force on the aggregate, because the impeller 3 tends to stir the aggregate outwards, and further the force exerted on the aggregate by the impeller 3 has radial component force, and further the aggregate exerts radial force on the shell 4, because the shell 4 is only in radial sliding connection relative to the mounting rack 2, and further the shell 4 only has radial freedom relative to the mounting rack 2, and further when the shell 4 is subjected to radial external force, the shell 4 moves along the direction of force, and further the gap between the shell 4 and the impeller 3 close to the position where the aggregate is clamped is increased, and further the aggregate can smoothly pass through the gap between the impeller 3 and the shell 4, and further the aggregate can be smoothly pumped out, the mortar pump is prevented from being blocked, so that the overload condition of the mortar pump is prevented, the damage of the mortar pump caused by overload is prevented, and the service life of the mortar pump is prolonged; because the casing 4 and the impeller 3 are bodies of revolution, when the casing 4 moves in the radial direction, the centerline axis of the casing 4 and the impeller 3 is offset, thereby increasing the clearance between the impeller 3 and one side of the shell 4, reducing the clearance between the other side of the impeller and the shell, and further leading the reduced side to be easy to block, through the arrangement of the reset spring 10, and then after the shell 4 moves radially to enable the aggregate to pass smoothly, under the elastic force action of the return spring 10, thereby leading the shell 4 to be recovered to the condition that the aggregate is not blocked, leading the central axis of the shell 4 to be superposed with the central axis of the impeller 3, thereby ensuring that the clearance between the shell 4 and the impeller 3 is constant in the circumferential range, further preventing the aggregate from being stuck due to different sizes of the clearance, and then reduce the dead condition of aggregate card, and then reduce the dead probability of jam of mortar pump, and then increase the life of mortar pump.

As shown in fig. 1, 2, 3, 5 and 8, a feeding pipe 11 is arranged on one side of the feeding hole of the shell 4; the feeding pipe 11 is fixedly connected with the shell 4 through a bolt; the feed pipe 11 is a rigid pipe.

When the mortar pump works, in the using process, when the mixture moves in the shell 4, the mixture is thrown out under the centrifugal action due to the action of the impeller 3 and then collides with the shell 4, the particle sizes of aggregates in the mixture are different, the impact strength of the mixture on the shell 4 is different, and further when the mortar pump works, the shell 4 is in a radial shaking state, meanwhile, the conveyed mortar mixture is in the process of condensation all the time in the conveying process, and further when the mortar mixture is conveyed for a long time, mortar is gradually condensed on the pipe wall of the feeding pipe 11, so that the mortar is stuck on the pipe wall of the feeding pipe 11, and the conveying efficiency of the mortar pump is reduced; consequently through setting inlet pipe 11 to the rigid pipe in this scheme, and then along with rocking of casing 4, and then make inlet pipe 11 be in the state of rocking, and then make the mortar mixture be in the state of vibrations, and then prevent that the material from condensing and gluing on the inner wall of inlet pipe 11, and then make inside mortar mixture smooth and easy entering into casing 4, and then prevent the jam of inlet pipe 11, and then prevent the reduction of the pumping efficiency that leads to along with the increase of pumping time, and then guaranteed the transport efficiency of mortar pump.

As shown in fig. 3, 4, 5, 6 and 8, an anti-seize member 12 is arranged between the output shaft of the motor 1 and the rotating shaft 5; the anti-locking component 12 is used for preventing the output shaft of the motor 1 from being locked.

When the motor works, a motor bearing is heated when the motor 1 runs in an overload mode, the service life is shortened, contacts of a contactor and a circuit breaker are heated when a control element and a circuit run in an overload mode for a long time, the service life is shortened, and the contacts are burnt out when the contacts are serious; secondly, if the motor 1 is overloaded for a long time, the current of the motor exceeds a rated value for a long time, so that the indexes of the winding temperature, the shaft temperature and the like of the motor are increased to exceed a normal allowable value, the motor is heated seriously, and the motor is damaged if the indexes are serious; if when entering into the inside mixture of casing 4 and containing too big building stones, can lead to the dead possibility of output shaft card, through the dead part 12 of anti-sticking who sets up in this scheme, make flexonics between the output shaft of pivot 5 and motor 1, and then when the output shaft is blocked, through the dead part 12 of anti-sticking who sets up, and then make the disconnection of being connected of motor 1 output shaft and 5 times of pivot, and then prevent that motor 1 output shaft from being blocked and die, and then prevent motor 1 from transshipping, and then prevent motor 1 from causing the damage because of transshipping, and then increase motor 1's life.

As shown in fig. 3, 4, 5, 6 and 8, one end of the output shaft of the motor 1 is provided with a connecting piece 13; one end of the connecting piece 13 is fixedly connected with the output shaft of the motor 1; the other end of the connecting piece 13 is uniformly provided with sliding chutes 14 at intervals; the limiting spring 15 is arranged in the sliding groove 14; one end of the limiting spring 15 is fixedly connected with the connecting piece 13; the other end of the limiting spring 15 is provided with a stop block 16; the stop block 16 is connected with the sliding chute 14 in a sliding manner; one end of the stop block is fixedly connected with the limiting spring 15; a through groove 17 is formed at one end of the rotating shaft 5; one end of the connecting piece 13 is positioned inside the through groove 17; the through grooves 17 are uniformly provided with clamping grooves 18 at intervals.

During working, the overload condition of the whole circuit is monitored in the connecting circuit of the motor 1 in most of the existing overload protection, so that the overload protection of the motor 1 is realized, and because the method carries out corresponding response by indirectly detecting the overload condition of the circuit, more intermediate processes cause long response time, meanwhile, the reliability of an electric control product is poorer relative to the mechanical structure, and the cost of adding monitoring and control elements in the circuit in which the motor 1 operates is higher, so that the use cost of equipment is increased; in the scheme, under normal conditions, one end of the baffle 16 is positioned in the clamping groove 18, and the other end of the baffle 16 is positioned in the sliding groove 14, so that the degree of freedom between two members and between the two members and the rotating shaft 5 in the rotating direction is limited, the torque output by the motor 1 can be smoothly transmitted to the rotating shaft 5, the impeller 3 is driven to rotate, and the power transmission of the mortar pump is smooth; when the rotating shaft 5 is clamped, the motor 1 still outputs torque under the condition of no power failure at the moment, so that the output shaft of the motor 1 and the connecting piece 13 continue to rotate, and as the rotating shaft 5 is clamped, the torque of the motor 1 continues to be output, so that the stop block 16 slides along the side wall of the clamping groove 18, the stop block 16 slides into the sliding groove 14, the rotating shaft 5 and the connecting piece 13 can rotate relatively in the rotating direction, a power transmission path between the motor 1 and the rotating shaft 5 is cut off, the motor 1 is prevented from being clamped, the motor 1 is prevented from being overloaded, and the service life of the motor 1 is prolonged; in the scheme, the motor 1 is separated from a transmission path of the force of a load end through a mechanical structure, so that the overload protection of the motor 1 is realized, the structure is simpler, and compared with parts required by control such as an electric part, a controller and the like, fewer parts are required, so that the cost is lower; in the scheme, the connecting piece 13 is arranged between the motor 1 and the rotating shaft 5; and then make the formation of pivot 5 department great volume, and then have great inertia at pivot 5 and connecting piece 13 department in the pivoted process, and then when impeller 3 slightly blocks and pause, make impeller 3 pass the card through the inertia of pivot 5 and connecting piece 13 department, and then prevent to block between impeller 3 and the casing 4.

As shown in fig. 5 and 6, the sectional length of the groove 6 is larger than the sectional diameter of the seal ring 7.

The during operation, because at the in-process of mortar work, casing 4 can produce for mounting bracket 2 and slide, and then can make sealing washer 7 receive the power that the slip produced, and then make sealing washer 7 appear rubbing and warp, through the cross-sectional diameter that is greater than sealing washer 7 with the setting of 6 cross-sectional length in recess, and then make sealing washer 7 can have certain removal space in recess 6, and then when sealing washer 7 received extrusion deformation, make sealing washer 7 can have the required space of deformation, and then make sealing washer 7 can keep better gesture when receiving rubbing, and then prevent the damage that sealing washer 7 leads to because of rubbing, and then increase sealing washer 7's life, and then increased mortar pump's life.

As shown in fig. 3, 5 and 6, the pressing plate 9 is provided with a ring groove 19; balls 20 are arranged in the annular groove 19 at intervals; the balls 20 are in contact with one side of the boss on the mounting frame 2.

During operation, when the shell 4 moves in the radial direction, relative movement occurs between the shell 4 and the mounting frame 2, and the pressing plate 9 and the mounting frame 2 also move relatively, so that the friction resistance is large, and the movement of the shell 4 is not smooth; through the ball 20 that sets up, and then with the friction form between clamp plate 9 and the mounting bracket 2, change rolling friction into by sliding friction, and then make the frictional resistance between clamp plate 9 and the mounting bracket 2 reduce, and then make the resistance that casing 4 removed reduce, and then be convenient for casing 4 in radial ascending removal, and then prevent that impeller 3's card is dead, and then prevent the mortar pump because of the damage that transships caused, and then increased the life of mortar pump.

As shown in fig. 1, 2, 5, 6 and 7, hooks 21 are provided at both ends of the return spring 10; the hook 21 is fixedly connected with the return spring 10; one hook 21 is fixedly connected with the mounting frame 2 through a bolt; the other hook 21 is fixedly connected with the pressure plate 9 through a bolt.

When the device works, because the gap between the mounting frame 2 and the side wall of the pressure plate 9 is small, and both sides of the return spring 10 need to be fixedly connected, the mounting is not changed; through the couple 21 that sets up, and then extend reset spring 10's fixed point to the clearance between mounting bracket 2 and the clamp plate 9 beyond, and then just have and use the bolt to fix reset spring 10, and then make reset spring 10's installation more convenient.

When the mortar pump works, the mortar pump is mainly used for pumping mixture such as gravel and the like, and due to different particle sizes of aggregate in the mixture, if the aggregate with larger particle size exists in the mixture in the pumping process, the aggregate is clamped in a gap between the impeller 3 and the shell 4 in the mortar pump, so that the impeller 3 is clamped, the mortar pump is clamped, mortar is overloaded, the mortar pump is damaged, and the service life of the mortar pump is shortened; according to the scheme, the shell 4 is radially and movably connected with the mounting frame 2, so that the shell 4 and the impeller 3 can move relatively in the radial direction, when aggregate in a mixture is clamped between the shell 4 and the impeller 3, the shell 4 can move relative to the impeller 3, a gap between the shell 4 and the impeller 3 at the material clamping position is increased, the aggregate can pass through the clamping position, the mortar pump is prevented from being clamped, the overload condition of the mortar pump is prevented, the mortar pump is prevented from being damaged due to overload, and the service life of the mortar pump is prolonged; when aggregate is clamped between the shell 4 and the impeller 3 in the mortar pump, the impeller 3 is driven by the motor 1 to continuously rotate, and further the impeller 3 exerts force on the aggregate, because the impeller 3 has a tendency of outwards stirring the aggregate, and further the force exerted on the aggregate by the impeller 3 has a radial component force, and further the aggregate exerts a radial force on the shell 4, because the shell 4 is only in radial sliding connection relative to the mounting rack 2, and further the shell 4 only has a degree of freedom in radial direction relative to the mounting rack 2, and further when the shell 4 is subjected to a radial external force, the shell 4 moves along the direction of the force, and further the gap between the shell 4 and the impeller 3 close to a position where the aggregate is clamped is increased, and further the aggregate can smoothly pass through the gap between the impeller 3 and the shell 4, and further the aggregate can be smoothly pumped out, the mortar pump is prevented from being blocked, so that the overload condition of the mortar pump is prevented, the damage of the mortar pump caused by overload is prevented, and the service life of the mortar pump is prolonged; because the casing 4 and the impeller 3 are bodies of revolution, when the casing 4 moves in the radial direction, the centerline axis of the casing 4 and the impeller 3 is offset, thereby increasing the clearance between the impeller 3 and one side of the shell 4, reducing the clearance between the other side of the impeller and the shell, and further leading the reduced side to be easy to block, through the arrangement of the reset spring 10, and then after the shell 4 moves radially to enable the aggregate to pass smoothly, under the elastic force action of the return spring 10, thereby leading the shell 4 to be recovered to the condition that the aggregate is not blocked, leading the central axis of the shell 4 to be superposed with the central axis of the impeller 3, thereby ensuring that the clearance between the shell 4 and the impeller 3 is constant in the circumferential range, further preventing the aggregate from being stuck due to different sizes of the clearance, and then reduce the dead condition of aggregate card, and then reduce the dead probability of jam of mortar pump, and then increase the life of mortar pump.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An anti-blocking mortar pump based on a floating shell comprises a motor (1), a mounting frame (2), an impeller (3), a shell (4) and a rotating shaft (5); one end of the motor (1) is arranged on the mounting rack (2); the mounting rack (2) is fixedly connected with the motor (1); one end of an output shaft of the motor (1) is provided with the rotating shaft (5); the rotating shaft (5) is connected with an output shaft of the motor (1); one end of the output shaft of the motor (1) is provided with the impeller (3); the impeller (3) is fixedly connected with the rotating shaft (5); the shell (4) is arranged outside the impeller (3); the method is characterized in that: the shell (4) is radially and movably connected with the mounting rack (2); the shell (4) and the mounting frame (2) are sealed.

2. The floating casing based anti-clogging mortar pump according to claim 1, wherein: one end, close to the shell (4), of the mounting rack (2) is connected with one side face of the shell (4) in a sliding mode; a groove (6) is formed in one end, close to the shell (4), of the mounting rack (2); a sealing ring (7) is arranged in the groove (6); the sealing ring (7) is abutted against one side surface of the shell (4); the outer part of the shell (4) is uniformly provided with fixed seats (8) at intervals; the fixed seat (8) is fixedly connected with the shell (4); a pressing plate (9) is arranged on one side surface of the fixed seat (8); the pressing plate (9) is fixedly connected with the fixed seat (8) through a bolt; one side surface of the pressing plate (9) close to the fixed seat (8) is abutted against one side surface of the boss on the mounting rack (2); the reset springs (10) are uniformly arranged outside the mounting rack (2) at intervals, and one ends of the reset springs (10) are fixedly connected with the mounting rack (2); the other end of the return spring (10) is fixedly connected with the pressing plate (9).

3. The floating casing based anti-clogging mortar pump according to claim 2, wherein: a feeding pipe (11) is arranged on one side of the feeding hole of the shell (4); the feeding pipe (11) is fixedly connected with the shell (4) through a bolt; the feeding pipe (11) is a rigid pipe.

4. The floating casing based anti-clogging mortar pump according to claim 3, wherein: an anti-blocking part (12) is arranged between the output shaft of the motor (1) and the rotating shaft (5); the anti-blocking component (12) is used for preventing the output shaft of the motor (1) from being blocked.

5. The floating casing based anti-clogging mortar pump according to claim 4, wherein: one end of an output shaft of the motor (1) is provided with a connecting piece (13); one end of the connecting piece (13) is fixedly connected with an output shaft of the motor (1); the other end of the connecting piece (13) is uniformly provided with sliding chutes (14) at intervals; a limiting spring (15) is arranged in the sliding groove (14); one end of the limiting spring (15) is fixedly connected with the connecting piece (13); the other end of the limiting spring (15) is provided with a stop block (16); the stop block (16) is in sliding connection with the sliding groove (14); one end of the stop block (16) is fixedly connected with the limiting spring (15); a through groove (17) is formed in one end of the rotating shaft (5); one end of the connecting piece (13) is positioned in the through groove (17); the through grooves (17) are uniformly provided with clamping grooves (18) at intervals.

6. The floating casing based anti-clogging mortar pump according to claim 5, wherein: the length of the cross section of the groove (6) is larger than the diameter of the cross section of the sealing ring (7).

7. The floating casing based anti-clogging mortar pump according to claim 6, wherein: a ring groove (19) is formed in the pressing plate (9); balls (20) are arranged in the annular groove (19) at intervals; the ball (20) is in contact with one side surface of the boss on the mounting frame (2).

8. The floating casing based anti-clogging mortar pump as claimed in claim 7, wherein: two ends of the return spring (10) are provided with hooks (21); the hook (21) is fixedly connected with the return spring (10); one hook (21) is fixedly connected with the mounting rack (2) through a bolt; the other hook (21) is fixedly connected with the pressure plate (9) through a bolt.