Fluorine-lined centrifugal pump

Abstract

The utility model provides a fluorine-lined centrifugal pump. Comprising a base, a support arranged above the base, a rotating motor arranged between the base and one end of the support, a pump body arranged between the base and the other end of the support, and a built-in mechanical seal arranged on the inner wall of the pump body and connected with the other end of the support, wherein a rotating shaft of the rotating motor is located in the support. The rear shaft seal is arranged on the end face, close to the rotating motor, of the built-in mechanical seal, and the fixing ring is arranged on the inner wall of the rear shaft seal in an attached mode, is close to the end face of the rotating motor and is matched with the rear shaft seal. And the fluorine-lined centrifugal pump is not easy to damage and the service life of the fluorine-lined centrifugal pump is not easy to shorten in case of continuous idling.

Description

Technical Field

[0001] The utility model relates to the technical field of fluorine-lined centrifugal pumps, in particular to a fluorine-lined centrifugal pump. Background Art

[0002] Fluorine-lined centrifugal pumps are, as the name implies, pumps lined with fluoroplastics. The pump body of a fluorine-lined centrifugal pump is manufactured using advanced production technology with a metal shell tightly lined with fluoroplastics. The load-bearing part of the pump is made of metal material, which has the advantages of high mechanical strength, strong pressure resistance, and superior resistance to mechanical impact. The main flow-through parts, such as the impeller and pump cover, are made of metal inserts wrapped with fluoroplastics and molded at high temperature in one go.

[0003] Fluorine-lined centrifugal pumps are widely used in: corrosive media transportation in chemical production, chlorine water wastewater treatment and acid addition process in ion membrane caustic soda projects, electrolyte transportation in non-ferrous metal smelting, pickling process in automobile manufacturing, as well as pharmaceutical, petroleum, electroplating, dye, pesticide, papermaking, food and other industries.

[0004] Although the above products can solve the corresponding technical problems, there are still certain defects in their use:

[0005] The fluorine-lined centrifugal pump cannot run idly continuously. If it runs idly continuously, it will easily cause damage to the fluorine-lined centrifugal pump and reduce its service life. Utility Model Content

[0006] The utility model aims to provide a fluorine-lined centrifugal pump in view of the defects and shortcomings of the prior art.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A fluorine-lined centrifugal pump, comprising a base, a bracket arranged above the base, a rotating motor arranged between the base and one end of the bracket and with a rotating shaft located in the bracket, a pump body arranged between the base and the other end of the bracket, a built-in mechanical seal arranged on the inner wall of the pump body and connected to the other end of the bracket, a rear shaft seal arranged on the end face of the built-in mechanical seal close to the rotating motor, a fixing ring fitted on the inner wall of the rear shaft seal and close to the end face of the rotating motor and matched with the rear shaft seal, an impeller rotatably arranged in the pump body, a front shaft seal with one end arranged outside the end face of the impeller close to the rotating motor and the other end located in the fixing ring and fitted with the rear shaft seal, a rotating shaft connecting the rotating motor and the front shaft seal, and a front shaft seal provided at the inner wall of the rear shaft seal and close to the end face of the rotating motor. The impeller passes through the shaft core of the rear shaft seal and the front shaft seal, an annular groove is opened on the inner wall of the rear shaft seal and is located outside the end of the fixed ring close to the rotating motor, a first connecting hole is opened on the end face of the rear shaft seal close to the rotating motor and is connected to the annular groove, a second connecting hole is opened on the end face of the rear shaft seal close to the rotating motor and is located below the first connecting hole and is connected to the annular groove, a storage tank for storing liquid is arranged on the bracket, a first pipe connecting the storage tank and the first connecting hole and passing through the bracket, and a second pipe connecting the storage tank and the second connecting hole and passing through the bracket, and the connection point of the first pipe with the storage tank is higher than the connection point of the second pipe with the storage tank.

[0009] A further improvement is that the storage box includes a storage box body arranged on the bracket, a liquid adding hole opened on the storage box body, a plug arranged on the storage box body and located in the liquid adding hole, and a heat dissipation hole opened on the plug.

[0010] A further improvement is that: the storage box is provided with a liquid level detection device for detecting the liquid level in the storage box.

[0011] A further improvement is that the liquid level detection device includes a float arranged in the storage box body, a connecting rod with one end arranged on the float and the other end passing through the upper end surface of the storage box body, and a detection limit block arranged at the other end of the connecting rod and located outside the storage box body.

[0012] A further improvement is that the shaft core is detachably connected to the rotating shaft of the rotating motor, and the impeller is detachably connected to the shaft core.

[0013] A further improvement is that a matching groove for matching with the rotating shaft of the rotating motor is formed on the end surface of the shaft core close to the rotating motor, and a plurality of abutting bolts for abutting the rotating shaft of the rotating motor are threadedly connected on the shaft core.

[0014] A further improvement is that: a limiting bolt for limiting the impeller on the shaft core is threadedly connected to the shaft core.

[0015] A further improvement is that the base is an anti-corrosion base with anti-corrosion effect.

[0016] After adopting the above technical scheme, the beneficial effects of the utility model are as follows: the liquid in the storage box enters the annular groove through the second pipe and the second connecting hole, the rotating motor drives the shaft core to rotate, the shaft core drives the impeller to rotate, the impeller drives the front shaft seal to rotate, the front shaft seal, the rear shaft seal and the fixed ring rotate relative to each other, and when the fluorine-lined centrifugal pump continues to idle, the liquid in the annular groove cools the heat generated by the relative rotation of the front shaft seal, the rear shaft seal and the fixed ring, and because the temperature of the liquid in the annular groove rises, the liquid enters the storage box through the first connecting hole and the first pipe; the fluorine-lined centrifugal pump can continue to idle, and continuous idling is not easy to cause damage to the fluorine-lined centrifugal pump and reduce the service life of the fluorine-lined centrifugal pump.

[0017] Further effects: the shaft core is detachably connected to the rotating shaft of the rotating motor, and the impeller is detachably connected to the shaft core. This allows the shaft core to be detachably connected to the rotating shaft of the rotating motor, making maintenance easier. This allows the shaft core to be detachably connected to the impeller, making maintenance easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It corresponds to Figure 1 A cross-sectional view of

[0021] Figure 3 It is a structural schematic diagram of the rear shaft seal, the annular groove, the first connecting hole and the second connecting hole in the utility model;

[0022] Figure 4 It is a schematic diagram of the structure of the front shaft seal in the utility model;

[0023] Figure 5 It is a structural schematic diagram of the liquid level detection device in the utility model;

[0024] Figure 6 It is a cross-sectional view of the rear shaft seal, the annular groove, the first communicating hole and the second communicating hole in the utility model.

[0025] Explanation of the reference numerals: base 1, bracket 2, rotating motor 3, pump body 4, built-in mechanical seal 5, rear shaft seal 6, fixing ring 7, impeller 8, front shaft seal 9, shaft core 10, annular groove 11, first connecting hole 12, second connecting hole 13, first pipeline 14, second pipeline 15, storage box body 16, liquid adding hole 17, plug 18, heat dissipation hole 19, float 20, connecting rod 21, detection limit block 22, matching groove 23, top bolt 24, limit bolt 25. DETAILED DESCRIPTION

[0026] The utility model is now further described in conjunction with the accompanying drawings and specific embodiments.

[0027] See also Figures 1 to 6 As shown, the technical solution adopted in this specific implementation is:

[0028] A fluorine-lined centrifugal pump, comprising a base 1, a bracket 2 arranged above the base 1, a rotating motor 3 arranged between the base 1 and one end of the bracket 2 and with a rotating shaft located in the bracket 2, a pump body 4 arranged between the base 1 and the other end of the bracket 2, a built-in mechanical seal 5 arranged on the inner wall of the pump body 4 and connected to the other end of the bracket 2, a rear shaft seal 6 arranged on the end face of the built-in mechanical seal 5 close to the rotating motor 3, a fixing ring 7 fitted on the inner wall of the rear shaft seal 6 and close to the end face of the rotating motor 3 and matched with the rear shaft seal 6, an impeller 8 rotatably arranged in the pump body 4, a front shaft seal 9 with one end arranged outside the end face of the impeller 8 close to the rotating motor 3 and the other end located in the fixing ring 7 and fitted with the rear shaft seal 6, and a rotating shaft connecting the rotating motor 3 and the impeller 8 A shaft core 10 passing through the rear shaft seal 6 and the front shaft seal 9, an annular groove 11 opened on the inner wall of the rear shaft seal 6 and located outside the end of the fixing ring 7 close to the rotating motor 3, a first connecting hole 12 opened on the end face of the rear shaft seal 6 close to the rotating motor 3 and connected to the annular groove 11, a second connecting hole 13 opened on the end face of the rear shaft seal 6 close to the rotating motor 3 and located directly below the first connecting hole 12 and connected to the annular groove 11, a storage box for storing liquid arranged on the bracket 2, a first pipe 14 connecting the storage box and the first connecting hole 12 and passing through the bracket 2, a second pipe 15 connecting the storage box and the second connecting hole 13 and passing through the bracket 2, and the connection point of the first pipe 14 with the storage box is higher than the connection point of the second pipe 15 with the storage box.

[0029] The end surface of the fixing ring 7 close to the rotating motor 3 can be fixedly connected or clamped with the rear shaft seal 6 in other ways; a sealing process will be performed between the fixing ring 7 and the rear shaft seal 6.

[0030] One end of the front shaft seal 9 can be fixedly connected to or clamped on the outer side of the end surface of the impeller 8 close to the rotating motor 3.

[0031] The storage box includes a storage box body 16 disposed on the bracket 2 , a liquid filling hole 17 opened on the storage box body 16 , a plug 18 disposed on the storage box body 16 and located in the liquid filling hole 17 , and a heat dissipation hole 19 opened on the plug 18 .

[0032] The storage box is provided with a liquid level detection device for detecting the liquid level in the storage box. The liquid level detection device includes a float 20 arranged in the storage box body 16, a connecting rod 21 with one end arranged on the float 20 and the other end passing through the upper end surface of the storage box body 16, and a detection limit block 22 arranged at the other end of the connecting rod 21 and located outside the storage box body 16.

[0033] The shaft core 10 is detachably connected to the rotating shaft of the rotating motor 3, and the impeller 8 is detachably connected to the shaft core 10. The end surface of the shaft core 10 close to the rotating motor 3 is formed with a matching groove 23 for matching with the rotating shaft of the rotating motor 3. The shaft core 10 is threadedly connected with a plurality of abutting bolts 24 for abutting the rotating shaft of the rotating motor 3. The shaft core 10 is threadedly connected with a limiting bolt 25 for limiting the impeller 8 on the shaft core 10. The number of the abutting bolts 24 is three.

[0034] The base 1 is a corrosion-resistant base with corrosion resistance, which can be a cast steel base, a cast iron base, a nickel-based wear-resistant alloy base, a medium alloy steel base, a carbon steel base, etc.

[0035] The rotating motor 3 is connected to the base 1 by several bolts, the rotating motor 3 is connected to one end of the bracket 2 by several bolts, the pump body 4 is connected to the other end of the bracket 2 by several bolts, the built-in machine seal 5 is connected to the other end of the bracket 2 by several bolts, and the built-in machine seal 5 is connected to the rear shaft seal 6 by several bolts. A sealing ring is provided between the built-in machine seal 5 and the inner wall of the pump body 4, a sealing ring is provided between the rear shaft seal 6 and the built-in machine seal 5, a sealing ring is provided between the front shaft seal 9 and the impeller 8, a sealing ring is provided between the front shaft seal 9 and the rear shaft seal 6, and a sealing ring is provided between the head of the limit bolt 25 and the impeller 8. A sealing ring is provided between the fixing ring 7 and the inner wall of the rear shaft seal 6 and away from the rotating motor 3. The first pipeline 14 and the second pipeline 15 can be hoses, and the plug 18 can be a leather plug.

[0036] A transparent connector connected to the first pipe 14 is provided in the first connecting hole 12 on the rear shaft seal 6, and a transparent connector connected to the second pipe 15 is provided in the second connecting hole 13 on the rear shaft seal 6. The first pipe 14 and the second pipe 15 are both connected to the storage box body 16 through transparent connectors.

[0037] A micro pump may be provided on the first pipe 14 to pump the liquid in the annular groove 11 into the storage box, and a micro pump may be provided on the second pipe 15 to pump the liquid in the storage box into the annular groove 11 .

[0038] The working principle of the utility model is as follows: the liquid in the storage box enters the annular groove 11 through the second pipe 15 and the second connecting hole 13, the rotating motor 3 drives the shaft core 10 to rotate, the shaft core 10 drives the impeller 8 to rotate, the impeller 8 drives the front shaft seal 9 to rotate, the front shaft seal 9 rotates relative to the rear shaft seal 6 and the fixed ring 7, when the fluorine-lined centrifugal pump continues to idle, the liquid in the annular groove 11 cools the heat generated by the relative rotation of the front shaft seal 9, the rear shaft seal 6 and the fixed ring 7, and because the temperature of the liquid in the annular groove 11 rises, the liquid enters the storage box through the first connecting hole 12 and the first pipe 14, and the liquid can be water or coolant.

[0039] The contents not described in detail in the utility model specification belong to the prior art known to those skilled in the art. The utility model is to protect the structure of the product, and the model of each component is not the content of the utility model protection, which is also the prior art known to those skilled in the art. Any component on the market that can achieve the above functions of the utility model can be used as a choice.

[0040] The basic principles, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A fluorine-lined centrifugal pump, characterized in that: The invention comprises a base, a bracket arranged above the base, a rotating motor arranged between the base and one end of the bracket and with a rotating shaft located in the bracket, a pump body arranged between the base and the other end of the bracket, a built-in mechanical seal arranged in the inner wall of the pump body and connected to the other end of the bracket, a rear shaft seal arranged on the end face of the built-in mechanical seal close to the rotating motor, a fixing ring fitted on the inner wall of the rear shaft seal and close to the end face of the rotating motor and matched with the rear shaft seal, an impeller rotatably arranged in the pump body, a front shaft seal with one end arranged outside the end face of the impeller close to the rotating motor and the other end located in the fixing ring and fitted with the rear shaft seal, a rotating shaft connecting the rotating motor and the impeller and a shaft core passing through the rear shaft seal and the front shaft seal, an annular groove opened on the inner wall of the rear shaft seal and located outside the end of the fixing ring close to the rotating motor, a first connecting hole opened on the end face of the rear shaft seal close to the rotating motor and connected to the annular groove, a second connecting hole opened on the end face of the rear shaft seal close to the rotating motor and located below the first connecting hole and connected to the annular groove, a storage tank for storing liquid arranged on the bracket, a first pipe connecting the storage tank and the first connecting hole and passing through the bracket, a second pipe connecting the storage tank and the second connecting hole and passing through the bracket, wherein a connection point between the first pipe and the storage tank is higher than a connection point between the second pipe and the storage tank.

2. A fluorine-lined centrifugal pump according to claim 1, characterized in that: The storage box includes a storage box body arranged on the bracket, a liquid adding hole opened on the storage box body, a plug arranged on the storage box body and located in the liquid adding hole, and a heat dissipation hole opened on the plug.

3. A fluorine-lined centrifugal pump according to claim 2, characterized in that: The storage box is provided with a liquid level detection device for detecting the liquid level in the storage box.

4. A fluorine-lined centrifugal pump according to claim 3, characterized in that: The liquid level detection device includes a float disposed in the storage box body, a connecting rod with one end disposed on the float and the other end penetrating the upper end surface of the storage box body, and a detection limit block disposed at the other end of the connecting rod and located outside the storage box body.

5. A fluorine-lined centrifugal pump according to claim 1, characterized in that: The shaft core is detachably connected to the rotating shaft of the rotating motor, and the impeller is detachably connected to the shaft core.

6. A fluorine-lined centrifugal pump according to claim 5, characterized in that: The end surface of the shaft core close to the rotating motor is formed with a matching groove for matching with the rotating shaft of the rotating motor, and a plurality of abutting bolts for abutting the rotating shaft of the rotating motor are threadedly connected on the shaft core.

7. A fluorine-lined centrifugal pump according to claim 5, characterized in that: The shaft core is threadedly connected with a limiting bolt for limiting the impeller on the shaft core.

8. A fluorine-lined centrifugal pump according to claim 1, characterized in that: The base is an anti-corrosion base with anti-corrosion effect.

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