Vertical pump with protective shaft sleeve

Abstract

The utility model provides a vertical pump with a protective shaft sleeve. Comprising a pump body, a pump cover arranged on the lower end face of the pump body, a pump cavity formed between the pump body and the pump cover, and a liquid inlet formed in the pump cover, communicated with the pump cavity and used for corrosive fluid to enter the vertical pump. The liquid outlet pipe is arranged on the pump cover, communicated with the pump cavity and used for enabling corrosive fluid to flow out of the vertical pump, and the driving cavity is formed in the pump body in a penetrating mode, communicated with the pump cavity and vertically arranged. When the impeller conveys corrosive fluid entering from the liquid inlet to the liquid outlet pipe, the corrosive fluid can be prevented from entering the through hole through the driving cavity to corrode the rotating motor main body to cause damage to the rotating motor main body; after the corrosive fluid in the vertical pump is gasified, the gasified corrosive fluid can be prevented from entering the through hole through the driving cavity to corrode the rotating motor main body to cause damage to the rotating motor main body, and long-term use of the vertical pump is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical pumps, in particular to a vertical pump with a protective shaft sleeve. Background Art

[0002] Vertical pumps are mainly used to transport corrosive fluids. The main working principle of vertical pumps is to drive the impeller to rotate through a motor, thereby sucking in and discharging the fluid.

[0003] Existing vertical pumps are as follows Figure 1 As shown, the vertical pump comprises a pump body 1', a pump cover 2' arranged on the lower end surface of the pump body 1', a pump chamber 3' formed between the pump body 1' and the pump cover 2', a liquid inlet 4' opened on the pump cover 2' and connected to the pump chamber 3' for the corrosive fluid to enter the vertical pump, a liquid outlet pipe 5' arranged on the pump cover 2' and connected to the pump chamber 3' for the corrosive fluid to flow out of the vertical pump, a driving chamber 6' extending through the pump body 1' and connected to the pump chamber 3' and arranged vertically, and a rotatable driving chamber 6' arranged on the pump chamber 3'. The impeller 7' in the pump body 3' is used for transporting the corrosive fluid coming from the liquid inlet 4' to the liquid outlet pipe 5', a connecting seat 8' is arranged on the upper end surface of the pump body 1', a through hole 9' is opened on the connecting seat 8' and is located directly above the driving cavity 6' and communicated with the driving cavity 6', a rotating motor body 10' is arranged on the connecting seat 8', and a driving shaft 11' is arranged on the rotating motor body 10' and passes through the through hole 9' to enter the driving cavity 6' and is fixedly connected to the impeller 7' for driving the impeller 7' to move.

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

[0005] During the period when the impeller 7' transports the corrosive fluid coming in from the liquid inlet 4' to the liquid outlet pipe 5', it cannot prevent the corrosive fluid from entering the through hole 9' through the driving chamber 6' and corroding the rotating motor body 10', causing damage to the rotating motor body 10'. After the corrosive fluid in the vertical pump is vaporized, it cannot prevent the vaporized corrosive fluid from entering the through hole 9' through the driving chamber 6' and corroding the rotating motor body 10', causing damage to the rotating motor body 10', which is not conducive to the long-term use of the vertical pump. Utility Model Content

[0006] The utility model aims to provide a vertical pump with a protective shaft sleeve 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 vertical pump with a protective sleeve, comprising a pump body, a pump cover arranged on the lower end surface of the pump body, a pump chamber formed between the pump body and the pump cover, a liquid inlet opened on the pump cover and connected to the pump chamber for corrosive fluid to enter the vertical pump, a liquid outlet pipe arranged on the pump cover and connected to the pump chamber for corrosive fluid to flow out of the vertical pump, a driving chamber opened on the pump body and connected to the pump chamber and arranged vertically, an impeller rotatably arranged in the pump chamber for transporting the corrosive fluid entering from the liquid inlet to the liquid outlet pipe, a connecting seat arranged on the upper end surface of the pump body, and a connecting seat opened on the connecting seat and located directly above the driving chamber and connected to the driving chamber. The pump body comprises a through hole, a rotating motor body arranged on the connecting seat, a driving shaft arranged on the rotating motor body and passing through the through hole to enter the driving cavity and fixedly connected with the impeller for driving the impeller to move, and also includes a built-in mechanical seal auxiliary device arranged between the connecting seat, the pump body and the driving shaft for preventing the corrosive fluid from entering the through hole through the driving cavity and corroding the rotating motor body to cause damage to the rotating motor body during the period when the impeller transports the corrosive fluid entering from the liquid inlet to the liquid outlet pipe, and preventing the corrosive fluid in the vertical pump from entering the through hole through the driving cavity and corroding the rotating motor body to cause damage to the rotating motor body after the corrosive fluid is vaporized.

[0009] Further improvement is that: the built-in machine seal auxiliary device includes an upper skeleton oil seal, an upper sealing seat, a sealing ring, a lower skeleton oil seal, a lower sealing seat, and a built-in machine seal chamber, the built-in machine seal chamber is formed between the pump body and the connecting seat and is located outside the driving chamber, the through hole and the driving chamber are both connected to the built-in machine seal chamber, the lower sealing seat is arranged on the pump body and is located in the built-in machine seal chamber, the lower skeleton oil seal is arranged between the lower sealing seat and the driving shaft, the sealing ring is arranged between the pump body and the lower sealing seat, the upper sealing seat is arranged between the connecting seat, the pump body, and the lower sealing seat and is located in the built-in machine seal chamber, and the upper skeleton oil seal is arranged between the upper sealing seat and the driving shaft.

[0010] A further improvement is that an upper protective sleeve and a lower protective sleeve are arranged in the driving cavity from top to bottom, the upper protective sleeve is fixedly arranged on the outside of the driving shaft, the lower protective sleeve is arranged on the outside of the driving shaft and fixedly connected to the impeller, and several first sealing rings are arranged between the upper protective sleeve and the lower protective sleeve.

[0011] A further improvement is that the end of the drive shaft away from the rotating motor body passes through the impeller, and a locking cap is detachably provided on the outside of the end of the drive shaft away from the rotating motor body, the locking cap abuts against the impeller, and a second sealing ring is provided between the locking cap and the impeller.

[0012] A further improvement is that the connecting seat is detachably connected to the pump body, the upper sealing seat is slidably fitted to the pump body and detachably connected to the lower sealing seat, and the lower sealing seat is slidably fitted to the pump body.

[0013] A further improvement is that a sealing ring seat is provided between the pump body, the pump cover and the impeller and in the pump chamber, and a third sealing ring is provided between the pump body and the sealing ring seat and between the pump cover and the sealing ring seat.

[0014] A further improvement is that an exhaust ring cavity is arranged in the pump body above the sealing ring seat and outside the driving cavity, an exhaust channel connected to the exhaust ring cavity is opened on the pump body, and an exhaust part connected to the exhaust channel is detachably arranged on the pump body.

[0015] A further improvement is that the exhaust member is an exhaust valve or an exhaust plug.

[0016] After adopting the above technical scheme, the beneficial effects of the utility model are as follows: during the period when the impeller transports the corrosive fluid coming in from the liquid inlet to the liquid outlet pipe, it can prevent the corrosive fluid from entering the through hole through the drive cavity and corroding the rotating motor body to cause damage to the rotating motor body; after the corrosive fluid in the vertical pump is vaporized, it can prevent the vaporized corrosive fluid from entering the through hole through the drive cavity and corroding the rotating motor body to cause damage to the rotating motor body, which is beneficial to the long-term use of the vertical pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 It is a structural schematic diagram of an existing vertical pump;

[0019] Figure 2 It is a structural schematic diagram of the utility model;

[0020] Figure 3 It corresponds to Figure 2 A cross-sectional view of

[0021] Figure 4 It corresponds to Figure 2 A magnified view of part A in FIG.

[0022] Figure 5 It corresponds to Figure 2 A magnified view of part B in FIG.

[0023] Figure 6 It corresponds to Figure 2 Enlarged view of section C in .

[0024] Explanation of the accompanying drawings: pump body 1', pump cover 2', pump chamber 3', liquid inlet 4', liquid outlet pipe 5', drive chamber 6', impeller 7', connecting seat 8', through hole 9', rotating motor body 10', drive shaft 11', pump body 1, pump cover 2, pump chamber 3, liquid inlet 4, liquid outlet pipe 5, drive chamber 6, impeller 7, connecting seat 8, through hole 9, rotating motor body 10, drive shaft 11, built-in machine seal chamber 12, lower sealing seat 13, lower skeleton oil seal 14, sealing ring 15, upper sealing seat 16, upper skeleton oil seal 17, upper protective sleeve 18, lower protective sleeve 19, first sealing ring 20, locking cap 21, second sealing ring 22, sealing ring seat 23, third sealing ring 24, exhaust ring chamber 25, exhaust channel 26, exhaust member 27, first connecting flange 28, second connecting flange 29, fastener 30. DETAILED DESCRIPTION

[0025] The utility model is now further described in conjunction with the accompanying drawings and specific embodiments.

[0026] See also Figures 2 to 6 As shown, the technical solution adopted in this specific implementation is:

[0027] A vertical pump with a protective sleeve, comprising a pump body 1, a pump cover 2 arranged on the lower end surface of the pump body 1, a pump chamber 3 formed between the pump body 1 and the pump cover 2, a liquid inlet 4 opened on the pump cover 2 and connected to the pump chamber 3 for corrosive fluid to enter the vertical pump, a liquid outlet pipe 5 arranged on the pump cover 2 and connected to the pump chamber 3 for corrosive fluid to flow out of the vertical pump, a driving chamber 6 that penetrates the pump body 1 and is connected to the pump chamber 3 and is vertically arranged, and a rotatable drive chamber 6 arranged in the pump chamber 3 for conveying the corrosive fluid from the liquid inlet 4 to the liquid outlet pipe. The impeller 7, a connecting seat 8 disposed on the upper end surface of the pump body 1, a through hole 9 opened on the connecting seat 8 and located directly above the drive chamber 6 and communicating with the drive chamber 6, a rotating motor body 10 disposed on the connecting seat 8, a driving shaft 11 disposed on the rotating motor body 10 and passing through the through hole 9 to enter the drive chamber 6 and fixedly connected to the impeller 7 for driving the impeller 7 to move, and also includes a device disposed between the connecting seat 8, the pump body 1, and the driving shaft 11 for preventing corrosion during the period when the impeller 7 transports the corrosive fluid coming from the liquid inlet 4 to the liquid outlet pipe 5 The built-in machine seal auxiliary device is provided to prevent the corrosive fluid from entering the through hole 9 through the driving cavity 6 and corroding the rotating motor body 10, causing damage to the rotating motor body 10, and to prevent the gasified corrosive fluid from entering the through hole 9 through the driving cavity 6 and corroding the rotating motor body 10, causing damage to the rotating motor body 10, after the corrosive fluid in the vertical pump is gasified. The built-in machine seal auxiliary device includes an upper skeleton oil seal 17, an upper sealing seat 16, a sealing ring 15, a lower skeleton oil seal 14, a lower sealing seat 13, and a built-in machine seal cavity 12. The built-in machine seal cavity 12 is formed on the pump body 1 Between the pump body 1 and the connecting seat 8 and outside the drive chamber 6, the through hole 9 and the drive chamber 6 are connected to the built-in machine seal chamber 12, the lower seal seat 13 is arranged on the pump body 1 and is located in the built-in machine seal chamber 12, the lower skeleton oil seal 14 is arranged between the lower seal seat 13 and the drive shaft 11, the sealing ring 15 is arranged between the pump body 1 and the lower seal seat 13, the upper seal seat 16 is arranged between the connecting seat 8, the pump body 1, and the lower seal seat 13 and is located in the built-in machine seal chamber 12, and the upper skeleton oil seal 17 is arranged between the upper seal seat 16 and the drive shaft 11. The lower skeleton oil seal 14 is located between the built-in machine seal chamber 12 and the drive chamber 6, and the upper skeleton oil seal 17 is located between the built-in machine seal chamber 12 and the drive chamber 6.

[0028] An upper protective sleeve 18 and a lower protective sleeve 19 are arranged in the driving chamber 6 from top to bottom. The upper protective sleeve 18 is fixedly arranged outside the driving shaft 11, and the lower protective sleeve 19 is arranged outside the driving shaft 11 and fixedly connected to the impeller 7. A plurality of first sealing rings 20 are arranged between the upper protective sleeve 18 and the lower protective sleeve 19. The upper protective sleeve 18 is a wear-resistant upper protective sleeve.

[0029] The end of the drive shaft 11 away from the rotating motor body 10 passes through the impeller 7, and a lock cap 21 is detachably provided on the outside of the end of the drive shaft 11 away from the rotating motor body 10. The lock cap 21 abuts against the impeller 7, and a second sealing ring 22 is provided between the lock cap 21 and the impeller 7. The end of the drive shaft 11 away from the rotating motor body 10 is threadedly connected with the lock cap 21.

[0030] The connecting seat 8 is detachably connected to the pump body 1, the upper sealing seat 16 is slidably fitted on the pump body 1 and detachably connected to the lower sealing seat 13, and the lower sealing seat 13 is slidably fitted on the pump body 1. The upper sealing seat 16 is threadedly connected to the lower sealing seat 13.

[0031] A sealing ring seat 23 is provided between the pump body 1 , the pump cover 2 and the impeller 7 and in the pump chamber 3 . A third sealing ring 24 is provided between the pump body 1 and the sealing ring seat 23 and between the pump cover 2 and the sealing ring seat 23 .

[0032] An exhaust ring cavity 25 is provided in the pump body 1 above the sealing ring seat 23 and outside the driving cavity 6. An exhaust channel 26 communicating with the exhaust ring cavity 25 is provided on the pump body 1. An exhaust member 27 communicating with the exhaust channel 26 is detachably provided on the pump body 1. The exhaust member 27 is an exhaust valve or an exhaust plug. When the exhaust member 27 is an exhaust plug, the exhaust plug is threadedly connected to the pump body 1.

[0033] The pump cover 2 is provided with a first connecting flange 28 , the liquid outlet pipe 5 is provided with a second connecting flange 29 , and the pump cover 2 and the pump body 1 , the rotating motor body 10 and the connecting seat 8 are all connected via fasteners 30 .

[0034] The working principle of the utility model is as follows: through the arrangement of the upper skeleton oil seal 17, the upper sealing seat 16, the sealing ring 15, the lower skeleton oil seal 14, the lower sealing seat 13, and the built-in machine seal chamber 12, during the period when the impeller 7 transports the corrosive fluid coming in from the liquid inlet 4 to the liquid outlet pipe 5, the corrosive fluid can be prevented from entering the through hole 9 through the drive chamber 6 and corroding the rotating motor body 10 to cause damage to the rotating motor body 10. After the corrosive fluid in the vertical pump is vaporized, the vaporized corrosive fluid can be prevented from entering the through hole 9 through the drive chamber 6 and corroding the rotating motor body 10 to cause damage to the rotating motor body 10, which is beneficial to the long-term use of the vertical pump.

[0035] 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 selected and applied.

[0036] 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 vertical pump with a protective sleeve, comprising a pump body, a pump cover arranged on the lower end surface of the pump body, a pump chamber formed between the pump body and the pump cover, a liquid inlet opened on the pump cover and connected to the pump chamber for corrosive fluid to enter the vertical pump, a liquid outlet pipe arranged on the pump cover and connected to the pump chamber for corrosive fluid to flow out of the vertical pump, a driving chamber extending through the pump body and connected to the pump chamber and arranged vertically, an impeller rotatably arranged in the pump chamber for transporting the corrosive fluid entering from the liquid inlet to the liquid outlet pipe, a connecting seat arranged on the upper end surface of the pump body, a through hole opened on the connecting seat and located directly above the driving chamber and connected to the driving chamber, a rotating motor body arranged on the connecting seat, and a driving shaft arranged on the rotating motor body and passing through the through hole to enter the driving chamber and fixedly connected to the impeller for driving the impeller to move, characterized in that: It also includes a built-in mechanical seal auxiliary device arranged between the connecting seat, the pump body and the driving shaft, which is used to prevent the corrosive fluid from entering the through hole through the driving cavity and corroding the rotating motor body to cause damage to the rotating motor body during the period when the impeller transports the corrosive fluid entering from the liquid inlet to the liquid outlet pipe, and to prevent the corrosive fluid in the vertical pump from entering the through hole through the driving cavity and corroding the rotating motor body to cause damage to the rotating motor body after the corrosive fluid is vaporized.

2. A vertical pump with a protective sleeve according to claim 1, characterized in that: The built-in machine seal auxiliary device includes an upper skeleton oil seal, an upper sealing seat, a sealing ring, a lower skeleton oil seal, a lower sealing seat, and a built-in machine seal cavity. The built-in machine seal cavity is formed between the pump body and the connecting seat and is located outside the driving cavity. The through hole and the driving cavity are both connected to the built-in machine seal cavity. The lower sealing seat is arranged on the pump body and is located in the built-in machine seal cavity. The lower skeleton oil seal is arranged between the lower sealing seat and the driving shaft. The sealing ring is arranged between the pump body and the lower sealing seat. The upper sealing seat is arranged between the connecting seat, the pump body, and the lower sealing seat and is located in the built-in machine seal cavity. The upper skeleton oil seal is arranged between the upper sealing seat and the driving shaft.

3. A vertical pump with a protective sleeve according to claim 2, characterized in that: An upper protective sleeve and a lower protective sleeve are arranged in the driving cavity from top to bottom. The upper protective sleeve is fixedly arranged outside the driving shaft, and the lower protective sleeve is arranged outside the driving shaft and fixedly connected to the impeller. Several first sealing rings are arranged between the upper protective sleeve and the lower protective sleeve.

4. A vertical pump with a protective sleeve according to claim 3, characterized in that: The end of the drive shaft away from the rotating motor body passes through the impeller, and a locking cap is detachably provided on the outside of the end of the drive shaft away from the rotating motor body. The locking cap abuts against the impeller, and a second sealing ring is provided between the locking cap and the impeller.

5. A vertical pump with a protective sleeve according to claim 4, characterized in that: The connecting seat is detachably connected to the pump body, the upper sealing seat is slidably fitted on the pump body and detachably connected to the lower sealing seat, and the lower sealing seat is slidably fitted on the pump body.

6. A vertical pump with a protective sleeve according to claim 1, characterized in that: A sealing ring seat is arranged between the pump body, the pump cover and the impeller and in the pump chamber, and a third sealing ring is arranged between the pump body and the sealing ring seat and between the pump cover and the sealing ring seat.

7. A vertical pump with a protective sleeve according to claim 6, characterized in that: An exhaust ring cavity is arranged in the pump body above the sealing ring seat and outside the driving cavity, an exhaust channel connected to the exhaust ring cavity is opened on the pump body, and an exhaust member connected to the exhaust channel is detachably arranged on the pump body.

8. A vertical pump with a protective sleeve according to claim 7, characterized in that: The exhaust component is an exhaust valve or an exhaust plug.

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