CN210397234U

CN210397234U - Self-priming pump with anti-freezing structure

Info

Publication number: CN210397234U
Application number: CN201920577984.8U
Authority: CN
Inventors: 戴荷生; 潘林福; 宗卫军; 潘柯越; 陈辉
Original assignee: Taizhou Ruiyi Electrical And Mechanical Co Ltd
Current assignee: Taizhou Ruiyi Electrical And Mechanical Co Ltd
Priority date: 2019-04-25
Filing date: 2019-04-25
Publication date: 2020-04-24
Anticipated expiration: 2029-04-25

Abstract

The utility model belongs to the technical field of the pump manufacturing technique and specifically relates to a self priming pump with freeze proof structure. This self priming pump with freeze resistant structure includes: the pump shell comprises a suction chamber, an impeller chamber and an extrusion chamber, a stainless steel shell is sleeved outside the pump shell, and a rubber heat-insulating layer is arranged between the stainless steel shell and the pump shell. The utility model discloses in, the pump case overcoat of self priming pump is equipped with stainless steel shell, has set up the rubber heat preservation between stainless steel shell and the pump case, makes this self priming pump can keep warm to the medium in the pump case, thereby prevents to freeze to split the pump body behind the water freezing in the pump case, still is applicable to simultaneously and carries the medium that has the coagulability under normal atmospheric temperature.

Description

Self-priming pump with anti-freezing structure

Technical Field

The utility model belongs to the technical field of the pump manufacturing technique and specifically relates to a self priming pump with freeze proof structure.

Background

Some pumped media can be kept in a liquid state only under the condition of relative temperature, and the pumped media are easy to cool and solidify in the pumping process, so that the liquid cannot be conveyed. And if stored liquid exists in the pump body after the shutdown, the stored liquid freezes and expands, so that the pump body is frozen and cracked.

Referring to fig. 1, chinese patent publication No. CN101608641B discloses a heat insulation structure of a chemical process pump, and belongs to the field of mechanical fluid. The invention aims to solve the problem that slurry is easy to crystallize in a pump body when the external temperature is low when a phosphoric acid slurry pump conveys phosphoric acid slurry in the prior art. The pump comprises a pump body, a jacket cover plate, a jacket and a jacket clapboard; the connection relationship is as follows: the rear side of the pump body inlet flange and the outer wall of the pump body inlet position are sequentially welded with a jacket, a jacket partition plate and a jacket cover plate, a closed cavity is formed among the jacket, the jacket cover plate and the pump body, high-temperature circulating liquid is injected into the closed cavity, the jacket partition plate is arranged at the lower side position between the jacket and the jacket cover plate, and two threaded holes in the jacket cover plate are arranged at two sides of the jacket partition plate. According to the invention, the pump body is insulated by injecting high-temperature circulating liquid into the sealed cavity, so that slurry is prevented from crystallizing in the pump body, the use efficiency of equipment is improved, and the yield of products is increased.

This insulation construction's of chemical industry process pump arrangement structure is complicated relatively to only set up the cover in the outside of the entrance of the pump body, keep warm to the entrance, neglected the heat preservation to play water end, pump cover, mechanical seal, thereby the medium is easy to be in the pump body internal crystallization or solidify and cause the damage to the pump body after shutting down.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a self priming pump with freeze proof structure can keep warm to the medium in the whole pump case, thereby prevents to freeze the pump body after the water in the pump case freezes to ice.

For reaching above-mentioned advantage, the utility model provides a self priming pump with freeze proof structure, including the pump case, the pump case includes suction chamber, impeller chamber and extrusion chamber, and this pump case overcoat is equipped with the stainless steel shell, has the rubber heat preservation between this stainless steel shell and this pump case.

In an embodiment of the present invention, the stainless steel case includes a front case and a rear case, and the front case is fixed to the rear case by a plurality of bolts.

In an embodiment of the present invention, the rubber heat insulating layer includes a front coating layer and a rear coating layer, the front coating layer and the rear coating layer are respectively provided with a through hole corresponding to the bolt for allowing the bolt to pass through.

In an embodiment of the present invention, the suction chamber includes: the steel plate A, the steel plate B and the steel plate C are sequentially provided with a first partition plate, a second partition plate and a third partition plate from right to left;

the steel plate A and the first partition plate are matched to form a water inlet area of the suction chamber, the steel plate B and the steel plate C are matched with the second partition plate and the third partition plate to form a water inlet channel communicated with the impeller chamber, and the water inlet area is communicated with the water inlet channel through a connecting pipe.

The utility model discloses an in one embodiment, the water inlet has been seted up to the right side wall lower extreme in intake zone, the water shortage protection valve is installed to the mouth of pipe of connecting pipe, inhalant canal is lieing in the mounting hole that is used for the installation is seted up to the top of connecting pipe the water shortage protection valve.

In an embodiment of the utility model, the lateral wall of impeller room is seted up jaggedly, the middle part of breach is fixed with the dog of "7" font, the preceding terminal surface of impeller room is equipped with baffle, first collar and second collar in proper order, the dog with the baffle cooperation be used for with the breach is separated become respectively with the sunction inlet of inhalant canal intercommunication of inhalant chamber and with the pressure export of extrusion room intercommunication.

In an embodiment of the present invention, the center of the impeller chamber is further provided with a blind positioning hole for installing the impeller.

In one embodiment of the present invention, the impeller chamber further has an annular partition block for forming an annular passage from the suction port to the extrusion port in the impeller chamber, and a side of the annular partition block has a connection end extending toward and connected to the stopper.

In one embodiment of the present invention, the extrusion chamber comprises: the steel plate D, the steel plate E, the steel plate F, the steel plate G and a fourth clapboard, a fifth clapboard and a sixth clapboard are sequentially arranged from left to right; a gas-liquid separation plate is arranged in the middle of the sixth separation plate towards the fifth separation plate;

the steel plate D, the steel plate E, the steel plate F, the steel plate G and the sixth partition plate form the outer wall of the extrusion chamber; the fourth partition plate, the fifth partition plate and the gas-liquid partition plate divide the extrusion chamber into a drainage area, a reflux area and a gas-liquid separation area.

In an embodiment of the present invention, the left outer wall of the extruding chamber is provided with a water outlet, and the water outlet and the axis of the water inlet are located on the same straight line.

The utility model discloses in, the pump case overcoat of self priming pump is equipped with stainless steel shell, has set up the rubber heat preservation between stainless steel shell and the pump case, makes this self priming pump can keep warm to the medium in the pump case, thereby prevents to freeze to split the pump body behind the water freezing in the pump case, still is applicable to simultaneously and carries the medium that has the coagulability under normal atmospheric temperature.

The utility model discloses in, rubber heat preservation has set up preceding coating and back coating, can carry out whole cladding to the pump case to easy processing.

The utility model discloses in, the precision of each passageway of pump case and lateral wall, baffle thickness between room and the room is easily controlled (thickness control is between 2-4 mm), has solved because of thickness too little the resistance defect such as the resistance that appears collapsing, pouring in the manufacturing process, and the rejection rate is low.

The utility model discloses in, the pump case is through each steel sheet stamping forming after welded fastening form, and the surface accuracy of steel sheet is high, therefore in each passageway of entering that the rivers can be smooth, reduced the volume loss, improved hydraulic efficiency, and solved the problem that easily forms the shrinkage cavity in the cooling solidification time after the casting, avoided the influence to have the normal operation of the self priming pump of freeze proof structure, work efficiency is high.

In the utility model, each steel plate of the pump shell is formed by stamping or bending, so that the corresponding stamping die can be manufactured for batch production, the forming period is short, the production efficiency is high and the service life of the stamping die is long; the pump shell is formed by splicing, the shape structure of the steel plate of the change part can be used for producing pump shells of different specifications, and meanwhile, when the internal structure of the pump shell needs to be adjusted, only the mould corresponding to the part needing to be adjusted needs to be changed or re-manufactured, the whole mould does not need to be re-manufactured like the requirement of casting process production, and therefore the manufacturing cost is convenient to use and reduced.

The utility model discloses in, set up plating layer or coating anti rust coating on the surface of shaping steel sheet, solved the easy rusty problem of pump case through the casting production.

In the utility model, the water inlet area is communicated with the water inlet channel through the connecting pipe, the pipe orifice of the connecting pipe is provided with the water shortage protection valve, when the water inlet area stops water inlet, the valve is closed, so that the self-priming pump with the anti-freezing structure stops working and the water in the pump shell is prevented from flowing back, the pump shell is filled with water, and the water does not need to be filled into the pump shell before starting; meanwhile, the impeller is prevented from being damaged and generating noise due to the fact that the impeller is rotated in a direction opposite to the flow direction of the liquid and large resistance is generated.

The utility model discloses in, the both sides of pump case have into water district and water drainage district respectively, and it is equipped with water inlet and outlet respectively to intake district and water drainage district, makes water can directly not enter into the impeller chamber from the water inlet and also can not follow the direct discharge toward the outlet of impeller chamber, has guaranteed the water level in the impeller chamber, and the axis of water inlet and outlet is located same straight line, makes the pressure balance between the exit of pump case.

Drawings

Fig. 1 is a schematic structural diagram of a heat insulation structure of a conventional chemical process pump.

Fig. 2 is a schematic structural diagram of a self-priming pump with a freeze-proof structure according to a first embodiment of the present invention.

FIG. 3 is an exploded view of the self-primer pump of FIG. 2 having a freeze resistant construction.

FIG. 4 is an exploded view of the pump body of the self-primer pump having a freeze resistant construction of FIG. 3.

FIG. 5 is a schematic cross-sectional view of the pump body of the self-primer pump having a freeze resistant construction of FIG. 4.

Fig. 6 shows an exploded view of the suction chamber of the pump body of fig. 4.

FIG. 7 shows an exploded view of the impeller chamber of the pump body of FIG. 4.

Fig. 8 shows an exploded view of the suction chamber of the pump body of fig. 4.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose of the present invention, the following detailed description will be given with reference to the accompanying drawings and preferred embodiments in order to provide the best mode, structure, features and effects according to the present invention.

Referring to fig. 2-4, a self-priming pump with freeze resistant structure according to a first embodiment of the present invention includes: the pump housing 1, the pump housing 1 includes a suction chamber 11, an impeller chamber 12, and a pressing chamber 13. A stainless steel shell 2 is sleeved outside the pump shell 1, and a rubber heat-insulating layer 3 is arranged between the stainless steel shell 2 and the pump shell 1.

The stainless steel case 2 includes a front case 21 and a rear case 22, and the front case 21 and the rear case 22 are fixed by a plurality of bolt connections. The front housing 21 and the rear housing 22 are provided with bolt holes 210 and bolt holes 220, respectively. The rubber heat-insulating layer 3 comprises a front coating layer 31 and a rear coating layer 32, and the front coating layer 31 and the rear coating layer 32 are respectively provided with a through hole 310 and a through hole 320 which correspond to the bolts and allow the rod body of the bolts to pass through.

Referring to fig. 5 and 6, the suction chamber 11 includes: the suction chamber comprises a steel plate A, a steel plate B and a steel plate C, wherein a first partition plate 111, a second partition plate 112 and a third partition plate 113 are sequentially arranged between the steel plate A, the steel plate B and the steel plate C from right to left, the steel plate A and the first partition plate 111 are matched to form a water inlet area 115 of the suction chamber 11, and the steel plate B and the steel plate C are matched with the second partition plate 112 and the third partition plate 113 to form a water inlet channel 116 communicated with the impeller chamber 12. The water inlet area 115 is communicated with the water inlet channel 116 through a connecting pipe 4.

The water inlet 115a has been seted up to the right side wall lower extreme of district 115 of intaking, and the water shortage protection valve 5 is installed to the mouth of pipe of connecting pipe 4, and water shortage protection valve 5 is used for the valve to close when district 115 stops intaking of intaking and then makes the self priming pump stop work that has anti-freeze structure and prevent the water backward flow in the pump case 1.

The water inlet channel 116 is provided with a mounting hole 116a for mounting the water shortage protection valve 5 above the connecting pipe 4, the radial dimension of the mounting hole 116a is larger than the outer diameter dimension of the connecting pipe 4. a transition section 116d is arranged between the water inlet end 116b of the water inlet channel 116 and the water outlet end 116c of the water inlet channel 116, the section of the transition section 116d is gradually reduced towards the water outlet end 116c for improving the hydraulic effect, the side wall of the water outlet end 116c of the water inlet channel 116 forms an angle α with the side wall of the transition section 116d, the angle α is used for buffering when water enters the impeller chamber 12, and preferably, the angle α is 15 degrees.

Referring to fig. 5 and 7, the impeller chamber 12 is a circular cup-shaped structure, a notch 120 is formed in a side wall of the impeller chamber 12, a 7-shaped stopper 14 is fixed to a middle portion of the notch 120, and a baffle 121, a first mounting ring 122 and a second mounting ring 123 are sequentially arranged on a front end surface of the impeller chamber 12. The stopper 14 cooperates with the baffle 121 to divide the notch 120 into a suction port 12a communicating with the water inlet passage 116 of the suction chamber 11 and a discharge port 12b communicating with the discharge chamber 13, respectively.

Specifically, one end surface of the stopper 14 is joined to the lower end of the sixth partition plate 133, and the other end surface is joined to the end surface of the third partition plate 113. The lower end of the second partition 112 is joined to the right sidewall of the suction port 12 a. The baffle 121 includes: the annular portion 121a, and a shielding portion 121b and a shielding portion 121c extending radially from a side surface of the annular portion 121a to shield the distal end surfaces of the water inlet passage 116 and the pressing passage 13d, respectively.

The inner diameter of the first mounting ring 122 is smaller than or equal to the radial dimension of the inner wall of the impeller chamber 12, the outer diameter of the second mounting ring 123 is equal to the inner diameter of the inner wall of the first mounting ring 122, and the inner diameter of the second mounting ring 123 is smaller than the radial dimension of the inner wall of the impeller chamber 12. The first mounting ring 122 and the second mounting ring 123 form a mounting portion for mounting the flashing.

The center of the impeller chamber 12 is provided with a blind positioning hole 124 for mounting the impeller. The impeller chamber 12 further has an annular partition block 125, and the side of the annular partition block 125 has a connection end 125a extending toward the stopper 14 and connected to the stopper 14. The annular partition block 125 is positioned at the bottom of the inner cavity of the impeller chamber 12, and the central axis of the annular partition block 125 is in the same line with the central axis of the positioning blind hole 124. The annular partition 125 is used to form an annular passage 12c in the impeller chamber 12 from the suction inlet 12a to the expression outlet 12 b. The thickness of the annular divider block 125 is used to control the delivery of the impeller chamber 12.

Referring to fig. 5 and 8, the extruding chamber 13 includes: the gas-liquid separation plate comprises a steel plate D, a steel plate E, a steel plate F, a steel plate G, a fourth partition plate 131, a fifth partition plate 132 and a sixth partition plate 133 which are sequentially arranged from left to right, and a gas-liquid separation plate 134 is arranged in the middle of the sixth partition plate 133 towards the fifth partition plate 132.

The steel plate D, the steel plate E, the steel plate F, the steel plate G, and the sixth partition 133 form an outer wall of the extruding chamber 13, and the fourth partition 131, the fifth partition 132, and the gas-liquid partition 134 divide the extruding chamber 13 into a water discharge region 13a, a reflux region 13b, and a gas-liquid separation region 13c, respectively. The gas-liquid separation plate 134 serves to break up bubbles from the impeller chamber 12 to separate gas and liquid, thereby reducing noise. The return region 13b serves to secure the water level in the impeller chamber 12.

Specifically, the steel plate D is a front outer wall of the extrusion chamber 13, the steel plate E is a rear outer wall of the extrusion chamber 13, the steel plate D and the steel plate E are arranged in parallel, and the steel plate F, the steel plate G and the sixth partition 133 are perpendicular to right, upper and left edges of the steel plate D and the steel plate E, respectively, to form a right outer wall, an upper outer wall and a left outer wall of the extrusion chamber 13. The lower end of the fourth partition 131 has an arc surface 131a engaged with the lower end of the steel plate E to close the lower end of the drain region 13 a. The fifth partition 132 is a curved plate, a first connecting portion 132a for being joined to the left side wall of the extrusion port 12b of the impeller chamber 12 is provided at the lower end of the curved plate, and a second connecting portion 133a for being joined to one end surface of the stopper 14 is provided at the lower end of the sixth partition 133. The first connecting portion 132a and the second connecting portion 133a form an extrusion passage 13d corresponding to the extrusion port 12 b.

The extrusion channel 13d is provided with a backflow partition 135, the backflow partition 135 is used for shortening the flow dividing time of the water flow and reducing the loss, the backflow partition 135 has an angle β with the central axis of the impeller chamber 12, and preferably, the angle β is 7-10 degrees.

The left outer wall of the extruding chamber 13 is provided with a water outlet 136, and the water outlet 136 and the axis of the water inlet 115a are positioned on the same straight line. Preferably, the steel E, the steel plate F and the steel plate G are integrally die-cast.

The manufacturing method of the pump shell of the self-priming pump with the anti-freezing structure comprises the following steps:

a101: preparing a steel plate blank, wherein the thickness of the steel plate is controlled to be about 2 mm;

b101: processing and forming the shapes required by the steel plates corresponding to the suction chamber, the impeller chamber and the extrusion chamber;

c101: and welding and fixing steel plates corresponding to the suction chamber, the impeller chamber and the extrusion chamber to form a pump shell.

The utility model discloses in the self priming pump with freeze proof structure of second embodiment, the manufacturing method of pump case is:

a102: preparing a steel plate blank, wherein the thickness of the steel plate is controlled to be about 2 mm;

b102: processing and forming the shapes required by the steel plates corresponding to the suction chamber, the impeller chamber and the extrusion chamber;

b112, B112: electroplating a layer of electroplated layer on the surfaces of all the formed steel plates for rust prevention;

c102: and welding and fixing steel plates corresponding to the suction chamber, the impeller chamber and the extrusion chamber to form a pump shell.

The utility model discloses in the self priming pump with freeze proof structure of third embodiment, the manufacturing method of pump case is:

a103: preparing a steel plate blank, wherein the thickness of the steel plate is controlled to be about 2 mm;

b103: processing and forming the shapes required by the steel plates corresponding to the suction chamber, the impeller chamber and the extrusion chamber;

b113: coating a layer of antirust paint on the surfaces of all the formed steel plates;

c103: and welding and fixing steel plates corresponding to the suction chamber, the impeller chamber and the extrusion chamber to form a pump shell.

Preferably, the steel plates are stainless steel plates. The processing and forming in the steps B101, B102 and B103 are one or more of stamping forming, bending forming, shearing forming and wire cutting forming. The welding in steps C101, C102, and C103 is laser brazing. The antirust paint can be stainless steel antirust paint. Further, the specific name and brand is as follows: aqueous metal baking coatings (070006).

The following is a national stainless steel surface grade table:

the following is a common stainless steel electroplating process flow:

The utility model discloses in, the precision of each passageway of pump case and the thickness of the lateral wall baffle between room and the room is easily controlled (thickness control is between 2-4 mm), has solved because of thickness too little the resistance defect such as the resistance that appears collapsing, pouring in the manufacturing process, and the rejection rate is low.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person can make modifications or changes equivalent to the above embodiments without departing from the scope of the present invention, but all the modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are within the scope of the present invention.

Claims

1. The utility model provides a self priming pump with freeze proof structure, includes the pump case, the pump case includes suction chamber, impeller chamber and extrusion chamber, its characterized in that, this pump case overcoat is equipped with the stainless steel shell, has the rubber heat preservation between this stainless steel shell and this pump case.

2. The self-primer pump having freeze resistant construction of claim 1 wherein said stainless steel outer casing includes a front casing and a rear casing, said front casing and said rear casing being secured by a plurality of bolted connections.

3. The self-primer pump with the antifreeze structure of claim 2, wherein the rubber insulation layer comprises a front coating layer and a rear coating layer, and the front coating layer and the rear coating layer are respectively provided with through holes corresponding to the bolts and allowing the bolts to pass through.

4. The self-primer pump having a freeze resistant construction of claim 1 wherein said suction chamber comprises: the steel plate A, the steel plate B and the steel plate C are sequentially provided with a first partition plate, a second partition plate and a third partition plate from right to left;

5. The self-priming pump with an anti-freezing structure as claimed in claim 4, wherein the lower end of the right side wall of the water inlet region is provided with a water inlet, the pipe orifice of the connecting pipe is provided with a water shortage protection valve, and the water inlet channel is provided with a mounting hole for mounting the water shortage protection valve above the connecting pipe.

6. The self-priming pump with an anti-freezing structure as claimed in claim 1, wherein a notch is formed in the side wall of the impeller chamber, a stop block shaped like a Chinese character '7' is fixed in the middle of the notch, a baffle, a first mounting ring and a second mounting ring are sequentially arranged on the front end face of the impeller chamber, and the stop block is matched with the baffle and used for separating the notch into a suction inlet communicated with a water inlet channel of the suction chamber and a pressure outlet communicated with the pressure chamber.

7. The self-primer pump with antifreeze structure of claim 6, wherein said impeller chamber is further provided with a blind locating hole in the center for mounting an impeller.

8. The self-primer pump of claim 6 having a freeze resistant construction wherein said impeller chamber further has an annular divider block for forming an annular passage within said impeller chamber from said suction port to said discharge port, the side of said annular divider block having a connecting end extending toward and connected to said stop.

9. The self-primer pump having a freeze resistant construction of claim 5, wherein said extrusion chamber comprises: the steel plate D, the steel plate E, the steel plate F, the steel plate G and a fourth clapboard, a fifth clapboard and a sixth clapboard are sequentially arranged from left to right;

a gas-liquid separation plate is arranged in the middle of the sixth separation plate towards the fifth separation plate;

the steel plate D, the steel plate E, the steel plate F, the steel plate G and the sixth partition plate form the outer wall of the extrusion chamber;

the fourth partition plate, the fifth partition plate and the gas-liquid partition plate divide the extrusion chamber into a drainage area, a reflux area and a gas-liquid separation area.

10. The self-primer pump with antifreeze structure of claim 9, wherein said left outer wall of said extrusion chamber is provided with a water outlet, said water outlet and said water inlet are aligned on the same line.