TWI738327B - Canned magnetic pump with reinforced leak-proof cover with back cover - Google Patents

Abstract

A canned magnetic pump with a back cover shield with enhanced leakage prevention, comprising a base, a motor unit, a rear cover shield, an impeller, a front cover, a first leak-proof element and a second leak-proof element . A first side surface of the base is in a step shape and has an inner ring section, an outer ring section and a first shoulder. The motor unit housing has a flange opposite to the inner ring section. The cover shield has an extension disc part airtightly clamped between the flange and the inner ring segment. An inner end face of the front cover has an inner ring segment, an outer ring segment and a second shoulder. The extension The disc portion and the flange are airtightly sandwiched between the inner ring section and the inner ring segment, the first leak-proof element is installed between the inner ring segment and the extended disc portion, and the second leak-proof element is installed Between the outer ring segment and the outer ring segment, the overall configuration can achieve the purpose of double leakage prevention.

Description

Canned magnetic pump with reinforced leak-proof cover with back cover

The invention relates to a canned magnetic pump, in particular to a canned magnetic pump with a back cover protective cover that is leak-proof and strengthened.

There is a magnetic drive pump (Taiwan Certificate No. I424661 Patent Case), which includes a front cover, a support frame, an impeller, a back cover, an inner rotor, an outer rotor, a fixed shaft and a trailer. The back cover is cup-shaped and has a two-layer shell structure, and has a back cover lining made of fluoroplastic and a strengthening layer.

Although this kind of magnetically driven pump utilizes the back cover lining and the reinforcement layer to form a two-layer shell structure, there is no leak-proof design between the end edge of the reinforcement layer and the back cover lining. When the back cover lining is cracked, the leaked chemical solution will spread along the gap between the back cover lining and the reinforcement layer, and will be resisted by the end edge of the reinforcement layer and the back cover lining. If the joint leaks to the outer rotor, the leaked chemical liquid will corrode the outer rotor and cause damage to the motor.

Therefore, the object of the present invention is to provide a canned magnetic pump with enhanced leakage prevention of the rear cover shield that can improve the leakage prevention effect.

Therefore, the canned magnetic pump with enhanced leakage prevention of the rear cover shield of the present invention includes a base, a motor unit, a rear cover shield, an impeller, a front cover, a first leakage prevention element, and a second Leak-proof components. The base includes a main plate member that surrounds an axis and is in a hollow ring shape, and a side cover member connected to the main plate member. The second side surface of the side surface and an inner peripheral surface intersecting between the first side surface and the second side surface and defining an inner hole. The inner ring section of the surface, an outer ring section surrounding the outer ring section, and a first shoulder intersectingly connected between the inner ring section and the outer ring section, the inner ring section relative to the outer ring section The section protrudes toward the outside. The motor unit is installed inside the base and includes a casing, a stator set between the casing and the base, and a rotor installed inside the casing. The housing has a hollow cylindrical main cylinder part for the rotor to be installed, and a flange intersectingly connected to the main cylinder part. The flange is opposite to the inner ring section, and the rear cover shield is installed on the base. Inside the seat, there is a main body part set between the main cylinder part and the stator, and an extension disc part intersecting and connected to the main body part. The extension disc part is airtightly clamped between the flange and the inner part. Between the ring segments, the impeller is driven by the motor unit, and relative to the first side surface, the front cover is positioned on the first side surface of the main disc member and covers the outside of the impeller, and has a front cover opposite to the first side surface. The inner end surface of the side surface, the inner end surface is in the shape of a step, and has an inner ring segment opposite to the inner ring segment, an outer ring segment surrounding the inner ring segment and opposite to the outer ring segment, and an intersecting connection Between the inner ring segment and the outer ring segment and opposite to the second shoulder of the first shoulder, the inner ring The segment is recessed toward the inside with respect to the outer ring segment, the extension disc portion and the flange are airtightly sandwiched between the inner ring segment and the inner ring segment, and the first leak-proof element is installed on the inner ring segment and the inner ring segment. Between the extended disc portions, the second leak-proof element is installed between the outer ring segment and the outer ring segment.

The effect of the present invention is that the first leak-proof element is installed between the inner ring section and the extension disc, even when the motor unit housing is cracked, the leaking chemical liquid will not It spreads to the stator along the gap between the rear cover shield and the housing, and can ensure the service life of the motor unit, and then uses the second leak-proof element to install on the outer ring section and the outer ring section The effect between them can prevent the chemical liquid from leaking out.

10: Pedestal

11: Main disk

111: first side

112: second side

113: inner hole

114: inner peripheral surface

115: inner circle section

116: Outer ring section

117: The first shoulder

118: first ring groove

119: second ring groove

110: arc lead angle

12: Side cover

20: positioning seat

30: Motor unit

31: Shell

311: Main Tube

312: Flange

32: stator

33: Rotor

40: Rear cover guard

41: main body

42: Extension plate

50: impeller

60: front cover

61: inner end face

611: inner ring segment

612: Outer Ring

613: second shoulder

614: third ring groove

71: The first leakproof element

72: The second leak-proof element

73: The third leak-proof element

L: axis

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a perspective exploded view of an embodiment of the canned magnetic pump with a back cover shield leak-proof and reinforced according to the present invention Figure 2 is a combined cross-sectional view of this embodiment; and Figure 3 is a partial enlarged schematic view of Figure 2.

Referring to Figures 1 to 3, an embodiment of the canned magnetic pump with a back cover shield leak-proof and reinforced according to the present invention includes a base 10, a positioning seat 20, a motor unit 30, a back cover cover 40, An impeller 50, a front cover 60, a first leakproof element 71, a second An anti-leakage element 72 and a third anti-leakage element 73.

The base 10 is made of plastic material [In this embodiment, an engineering plastic material with acid and alkali resistance can be selected, such as polypropylene (PP), fiber reinforced polypropylene (Glass Fiber reinforced Polypropylene, GFRPP) , Polyvinylidene difluoride (PVDF), Carbon Fiber Filled ETFE (CFRETFE). ETFE is the abbreviation of Ethylene Tetra Fluoro Ethylene in English, and the Chinese name is ethylene-tetrafluoroethylene copolymer. Commonly known as fluoroplastic resin), etc.], and has a main plate member 11 that surrounds an axis L and can define a hollow ring shape, and a side cover member 12 connected to the main plate member 11 along the axis L, the The main plate 11 has a first side surface 111, a second side surface 112 opposite to the first side surface 111 along the axis L, and an intersecting connection between the first side surface 111 and the second side surface 112 and can define An inner peripheral surface 114 of the inner hole 113 is formed, and the inner peripheral surface 114 has an arc lead angle 110 connected to the first side surface 111. The first side surface 111 is in a step shape, and has an inner ring section 115 connected to the arc lead angle 110, an outer ring section 116 surrounding the inner ring section 115, and an intersecting connection to the inner ring section 115 A first shoulder 117 with the outer ring section 116, a first ring groove 118 arranged on the inner ring section 115 and in a continuous loop shape around the axis L, and a first ring groove 118 arranged on the outer ring section 116 and The second ring groove 119 is a continuous loop around the axis L. The first ring groove 118 is adjacent to the arc lead angle 110. The inner ring segment 115 protrudes toward the outside relative to the outer ring segment 116. The second ring groove 119 is adjacent to the first shoulder 117. The side cover 12 is connected to the second side surface 112.

The positioning seat 20 is made of a metal material and made into a hollow cylindrical shape and is nested inside the side cover 12 of the base 10 and abuts against the second side surface 112.

The motor unit 30 is installed inside the base 10 and the positioning seat 20. The motor unit 30 of this embodiment adopts a canned motor, and includes a housing 31, a stator 32 set between the housing 31, the positioning base 20, and the base 10, and a stator 32 mounted on the housing 31 The inner rotor 33. The housing 31 has a main cylindrical portion 311 in which the rotor 33 is installed and in a hollow cylindrical shape, and a flange 312 intersectingly connected to the main cylindrical portion 311. The flange 312 is opposite to the inner圈段115.

The rear cover 40 is installed inside the base 10, and has a main body 41 set between the main cylinder 311 and the stator 32, and an extension plate 42 intersectingly connected to the main body 41 The extension disc 42 is air-tightly sandwiched between the flange 312 and the inner ring section 115.

The impeller 50 is driven by the motor unit 30 and is opposite to the first side surface 111.

The front cover 60 is positioned on the first side surface 111 of the main disc 11 and covers the outside of the impeller 50, and has an inner end surface 61 opposite to the first side surface 111. The inner end surface 61 is in a step shape and has An inner ring segment 611 opposite to the inner ring segment 115, an outer ring segment 612 surrounding the inner ring segment 611 and opposite to the outer ring segment 116, and an intersecting connection between the inner ring segment 611 and the outer ring Between the segments 612 and relative to the first shoulder 117 And a third ring groove 614 disposed on the inner ring segment 611 and formed in a continuous ring shape around the axis L. The inner ring segment 611 is recessed toward the inner ring relative to the outer ring segment 612, the third ring groove 614 is adjacent to the second shoulder 613, and the extension disc portion 42 and the flange 312 are airtightly clamped on the inner ring Between the segment 115 and the inner ring segment 611, the peripheral edge of the flange 312 and the peripheral edge of the extension plate 42 abut against the second shoulder 613.

The first leak-proof element 71 is installed between the inner ring segment 115 and the extension disc portion 42. In this embodiment, the first leak-proof element 71 is nested in the first ring groove 118.

The second leak-proof element 72 is installed between the outer ring segment 116 and the outer ring segment 612. In this embodiment, the second leak-proof element 72 is nested in the second ring groove 119.

The third leak-proof element 73 is nested in the third ring groove 614.

In order to further understand the effects of the cooperation of the various elements of the present invention, the technical means used, and the expected effects, the following will be explained again, and it is believed that a deeper and specific understanding of the present invention can be obtained from this.

As shown in Figures 2 and 3, when the integrally assembled canned magnetic pump with a back cover shield of the present invention with enhanced leakage prevention is completed, the front cover 60 is locked to the main plate 11 of the base 10 with a plurality of screws. , So that the step-shaped first side surface 111 and the inner end surface 61 are concave-convex nested, that is to say, the inner ring segment 115 is used to protrude outward relative to the outer ring segment 116, and the inner ring segment 611 is relative to the The outer ring segment 612 is recessed toward the inside, and the extension disc portion 42 and the flange 312 are airtightly sandwiched between the inner ring segment 115 and the inner ring segment 611, The peripheral edge of the flange 312 and the peripheral edge of the extension disk portion 42 abut against the second shoulder 613, so that the extension disk portion 42 and the flange 312 can be positioned and sealed well.

Reuse, the first leak-proof element 71 is installed between the inner ring segment 115 and the extension disc portion 42, and the first leak-proof element 71 is nested in the first ring groove 118, even when the tank After using the magnetic pump for a period of time, the main cylinder portion 311 of the casing 31 that is often in contact with chemical liquids is cracked, and the chemical liquid leaks between the casing 31 and the back cover 40, and the The arrangement of the first anti-leakage element 71 can prevent the chemical liquid from leaking to the stator 32, and can produce a first anti-leakage. Moreover, the second leak-proof element 72 is also installed between the outer ring section 612 and the outer ring section 116, so that the inner end surface 61 and the first side surface 111 are kept air (water) tight, which can produce a The second anti-leakage.

Furthermore, because the flange 312 of the housing 31 and the extension plate 42 of the rear cover 40 are sandwiched between the front cover 60 and the first side surface 111, as a result, the motor unit 30 The flange 312 of the housing 31 and the extension plate 42 of the rear cover 40 are positioned relative to the base 10 and the positioning seat 20, and are clamped to the flange 312 by the third leak-proof element 73 Between the inner ring segment 611 and the inner ring segment 611, it can be ensured that the joints of the front cover 60, the flange 312, and the base 10 are air (water) tight, and a better anti-leakage effect is produced.

The first side surface 111 and the inner end surface 61 in a step-like shape are concave and convex nested, and the inner ring section 115 is used to protrude outward relative to the outer ring section 116, and the inner ring section 611 is relative to the outer ring section. 612 is recessed toward the inside, and the first leak-proof element The arrangement of the element 71, the second leak-proof element 72 and the third leak-proof element 73 can also effectively prevent the chemical liquid dripping from the filter barrel from leaking into the stator 32, so that the motor unit can be extended 30 life span.

Furthermore, the step-shaped first side surface 111 and the inner end surface 61 are concave and convexly nested, which can form a multi-turn structure, which can produce a better leakage prevention effect at the abutment of the flange 312 and the extension plate 42 .

In summary, the canned magnetic pump with enhanced leakage prevention of the back cover of the present invention has a simple overall structure, easy manufacture and assembly, and can achieve a better leakage prevention effect, which can indeed achieve the purpose of the invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to Within the scope covered by the patent of the present invention.

10: Pedestal

11: Main disk

12: Side cover

20: positioning seat

30: Motor unit

31: Shell

32: stator

33: Rotor

40: Rear cover guard

41: main body

42: Extension plate

50: impeller

60: front cover

71: The first leakproof element

72: The second leak-proof element

73: The third leak-proof element

L: axis

Claims (8)

A canned magnetic pump with a back cover and a leak-proof and reinforced canned magnetic pump, including: A base includes a main plate member that surrounds an axis and is in a hollow ring shape, and a side cover member connected to the main plate member. The main plate member has a first side surface and a A second side surface of a side surface, and an inner peripheral surface that is intersected and connected between the first side surface and the second side surface and can define an inner hole. The inner ring section of the peripheral surface, an outer ring section surrounding the outer ring section of the inner ring section, and a first shoulder intersectingly connected between the inner ring section and the outer ring section, the inner ring section relative to the outer ring section The ring segment protrudes towards the outside; A motor unit is installed inside the base, and includes a casing, a stator set between the casing and the base, and a rotor installed inside the casing. The casing has a supply The rotor is installed with a hollow cylindrical main cylinder, and a flange intersectingly connected to the main cylinder, the flange opposite to the inner ring section; A rear cover shield is installed inside the base and has a main body part set between the main cylinder part and the stator, and an extension disc part intersectingly connected to the main body part. Closely clamped between the flange and the inner ring section; An impeller driven by the motor unit and opposite to the first side surface; A front cover positioned on the first side surface of the main disc and covering the outside of the impeller, and has an inner end surface opposite to the first side surface. The inner ring segment of the segment, an outer ring segment surrounding the inner ring segment and opposite to the outer ring segment, and an intersecting connection between the inner ring segment and the outer ring segment and opposite to the first shoulder The inner ring segment is recessed toward the inside with respect to the outer ring segment, and the extension disk portion and the flange are airtightly sandwiched between the inner ring segment and the inner ring segment; A first leak-proof element installed between the inner ring section and the extension disc portion; and A second leak-proof element is installed between the outer ring segment and the outer ring segment. According to claim 1, the canned magnetic pump with a back cover shield with enhanced leak-proofness, wherein the main disc member of the base further has a second section arranged on the inner ring section and in a continuous loop shape around the axis A ring groove, and the first leak-proof element is nested in the first ring groove. The canned magnetic pump with a leak-proof reinforced rear cover shield according to claim 2, wherein the first ring groove of the main disc member of the base is adjacent to the inner circumferential surface. According to claim 1, the canned magnetic pump with a back cover shield with enhanced leakage prevention, wherein the main disc member of the base further has a second ring which is arranged on the outer ring section and is in a continuous loop shape around the axis. Two ring grooves, the second leak-proof element is nested in the second ring groove. According to claim 4, the canned magnetic pump with a back cover shield with enhanced leakage prevention, wherein the second ring groove of the main plate member of the base is adjacent to the first shoulder. According to claim 1, the canned magnetic pump with a rear cover shield with enhanced leakage prevention, wherein the front cover further has a third ring groove arranged in the inner ring segment and in a continuous ring shape around the axis, The canned magnetic pump also includes a third leak-proof element nested in the third ring groove, and the third leak-proof element makes the flange abut against the inner ring section in an airtight manner. The canned magnetic pump with a leak-proof reinforced rear cover shield according to claim 6, wherein the third ring groove of the front cover is adjacent to the second shoulder. The canned magnetic pump with a back cover shield with enhanced leakage prevention according to claim 1, wherein the flange periphery of the housing of the motor unit and the peripheral edge of the extension plate portion of the rear cover shield abut against the first Two shoulders.

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