Device for preventing pump shaft of submerged pump from falling off

Abstract

The utility model belongs to the technical field of submerged pumps, and particularly relates to a device for preventing a pump shaft of a submerged pump from falling off, which comprises a pump shaft body, a coupler is arranged at the lower end of the pump shaft body, a key groove is arranged on the surface of the pump shaft body, and a locking gasket is sleeved on the outer side of the pump shaft body in a sliding mode. The inner side wall of the locking gasket is fixedly connected with a key piece, the key piece is connected with the key groove in a sliding mode, the outer side of the locking gasket is fixedly connected with a limiting protrusion, and the coupler is provided with a jacking mechanism. According to the scheme, through the arrangement of the key groove and the key piece, the locking gasket can be installed and used, the locking nut provided with the limiting groove can be subjected to limiting treatment in cooperation with the effect of the limiting protrusion, the phenomenon that the locking nut at the bearing position of the pump shaft retreats is avoided, the problem that the pump shaft falls off is completely eradicated, and the service life of the pump shaft is prolonged. The maintenance workload of the submerged pump for department production is reduced, and the operation and maintenance cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of submersible pump, concretely relates to a device for preventing pump shaft of submersible pump from falling. BACKGROUND

[0002] Submersible pump is a kind of pump that can work completely immersed in liquid, usually used for transporting liquid, sewage, slurry or other solid particles containing medium. The design of submersible pump enables it to run below the liquid surface, avoiding the trouble of traditional pump needing to draw water, while reducing the risk of leakage.

[0003] In patent application publication no. CN105570182A, a kind of connecting structure of pump shaft and motor of submersible pump is disclosed, which includes motor, pump shaft and support tube assembly. The pump shaft is located in the support tube assembly, and the upper end of the pump shaft is provided with bearing seat shaft. The bearing seat shaft is detachably connected with the pump shaft. Motor coupling and pump coupling are arranged between the motor and the pump shaft. The bearing seat shaft and the pump coupling form an integral, and the motor coupling is connected with the motor shaft.

[0004] At present, the submersible pump of concentrated sulfuric acid and caustic lye in acid-base warehouse is the main key equipment to ensure the unloading of sulfuric acid and caustic lye into the warehouse and the transportation of raw materials to the production workshop. The submersible pump needs to be frequently started and stopped during unloading. When the pump is stopped, it will be reversed for a short time, and then the pump will be started again. As a result, the lock nut of the bearing position will be loosened, and the pump shaft will fall off. This will cause the gap between the upper and lower halves of the coupling to increase and misalign, and the coupling will be damaged quickly. Furthermore, the pump will shake greatly, and the impeller will contact the pump shell due to the falling of the pump shaft, which will cause the wear and damage of the key components such as the impeller and the pump shell. The maintenance amount caused by this problem can reach about 4 times per month. SUMMARY

[0005] The utility model aims at providing a kind of device for preventing pump shaft of submersible pump from falling, solve the problem that the pump will be reversed for a short time when submersible pump is frequently started and stopped, and then the pump will be started again. As a result, the lock nut of the bearing position will be loosened, and the pump shaft will fall off. This will cause the gap between the upper and lower halves of the coupling to increase and misalign, and the coupling will be damaged quickly. Furthermore, the pump will shake greatly, and the impeller will contact the pump shell due to the falling of the pump shaft, which will cause the wear and damage of the key components such as the impeller and the pump shell. The maintenance amount caused by this problem can reach about 4 times per month.

[0006] In order to achieve the above purpose, the utility model provides a kind of device for preventing pump shaft of submersible pump from falling, which includes pump shaft body. The lower end of the pump shaft body is provided with a coupling. The surface of the pump shaft body is provided with a key groove. The outer side of the pump shaft body is slidably sleeved with a stop washer. The inner side wall of the stop washer is fixedly connected with a key piece. The key piece is slidably connected with the key groove. The outer side of the stop washer is fixedly connected with a limiting protrusion. A jacking mechanism is arranged on the coupling.

[0007] The utility model discloses a principle lies in: through the stop washer set on the pump shaft body, make the key piece slip into the key groove, the positioning treatment is carried out to the stop washer, under the action of the screw thread on the pump shaft body surface, can carry out the screw fixing to lock nut, and make the limiting protrusion of stop washer insert the limiting slot of lock nut, and the limiting of lock nut is carried out, and then the locking treatment is carried out to pump shaft body and shaft coupling,

[0008] When the stop washer contacts the positioning sheet, under the action of the positioning sheet, the stop washer can be positioned again, and under the cooperation of the elastic member, the telescopic rod and other structures, the limiting protrusion of the stop washer can be engaged with the limiting slot of the lock nut, so that good dynamic limiting effect is ensured.

[0009] The utility model discloses the beneficial effect lies in: the present scheme is through the setting of key groove and key piece, can install and use to the stop washer, and cooperate the action of limiting protrusion, can carry out the limiting treatment to the lock nut of the limiting slot, avoid the phenomenon that the lock nut of pump shaft bearing position is locked and produces the silk, prevent the problem that pump shaft falls, reduce department production under the pump maintenance workload, save operation and maintenance cost, through the setting of positioning sheet, the positioning and clamping of the stop washer can be carried out, and then the limiting protrusion of the stop washer is always engaged in the limiting slot of the lock nut, so that good limiting effect is ensured, and under the deformation of the elastic member, good dynamic contact effect of the stop washer can be ensured.

[0010] Further, the overall shape of the stop washer is annular, and the stop washer is made of stainless steel. Through the setting of the stainless steel material, the stop washer has good corrosion resistance.

[0011] Further, the limiting protrusions are evenly distributed on the stop washer. Through the setting of the limiting protrusions, the lock nut can be conveniently limited in subsequent use.

[0012] Further, the clamping mechanism includes a fixed frame, the upper end of the shaft coupling is fixedly connected with the fixed frame, the inner wall of the fixed frame is slidably connected with a telescopic rod, the end face of the telescopic rod close to the stop washer is fixedly connected with a positioning sheet, the positioning sheet contacts the stop washer, the end face of the positioning sheet is bonded with an elastic member, the other end of the elastic member contacts the fixed frame. Through the setting of the positioning sheet, the stop washer can be positioned in contact, so that the stop washer is always in contact with the lock nut.

[0013] Further, the end face of the telescopic rod away from the stop washer is fixedly connected with a guide block, and the guide block is slidably connected with the fixed frame. Through the setting of the guide block, the telescopic rod can be moved and guided.

[0014] Further, the elastic pieces are provided in plurality, and the plurality of elastic pieces are symmetrically distributed on the fixing frame, and through the arrangement of the elastic pieces, the positioning sheet can be connected and used.

[0015] Further, the surface of the positioning sheet is provided with a plurality of friction grooves, and the plurality of friction grooves are uniformly distributed on the positioning sheet, and through the arrangement of the friction grooves, the good contact friction effect of the positioning sheet can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic view of the device for preventing the pump shaft of the submersible pump from falling off in the embodiment of the application;

[0017] Figure 2 It is a schematic view of the device for preventing the pump shaft of the submersible pump from falling off in the embodiment of the application; Figure 1 It is an enlarged view of the stop washer;

[0018] Figure 3 It is an enlarged view of A of the device for preventing the pump shaft of the submersible pump from falling off in the embodiment of the application; Figure 2

[0019] Figure 4 It is an axial sectional view of the stop washer of the device for preventing the pump shaft of the submersible pump from falling off in the embodiment of the application. Figure 1

[0020] The following is further described in detail through specific embodiments:

[0021] The reference signs in the drawings of the specification include: pump shaft body 1, shaft coupling 2, key groove 3, stop washer 4, key piece 5, limiting protrusion 6, clamping mechanism 7, fixing frame 71, telescopic rod 72, guide block 73, positioning sheet 74, elastic piece 75, friction groove 76. DETAILED DESCRIPTION

[0022] The embodiment is basically as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 The embodiment provides a device for preventing the pump shaft of the submersible pump from falling off, which comprises a pump shaft body 1, the lower end of the pump shaft body 1 is provided with a shaft coupling 2, the surface of the pump shaft body 1 is provided with a key groove 3, the outer side of the pump shaft body 1 is slidably sleeved with a stop washer 4, the inner side wall of the stop washer 4 is fixedly connected with a key piece 5, the key piece 5 is slidably connected with the key groove 3, and the outer side of the stop washer 4 is fixedly connected with a limiting protrusion 6.

[0023] As Figure 1 , Figure 2 , Figure 4 ​​As shown, the whole of the stop washer 4 is annular, the stop washer 4 is made of stainless steel, through the setting of the stainless steel material, the stop washer 4 has good corrosion resistance, the limiting protrusions 6 are provided with a plurality of, the plurality of limiting protrusions 6 are uniformly distributed on the stop washer 4, through the setting of the limiting protrusions 6, it is convenient for subsequent cooperation with the locking nut to limit the use.

[0024] As shown in Figure 1 , Figure 2 , Figure 3 shown, the shaft coupling 2 is provided with a jacking mechanism 7, the jacking mechanism 7 includes a fixed frame 71, the upper end of the shaft coupling 2 is fixedly connected with the fixed frame 71, the inner wall of the fixed frame 71 is slidably connected with the telescopic rod 72, the end face of the telescopic rod 72 close to the stop washer 4 is fixedly connected with the positioning piece 74, the positioning piece 74 is in contact with the stop washer 4, the end face of the positioning piece 74 is bonded with the elastic element 75, the other end of the elastic element 75 is in contact with the fixed frame 71, through the setting of the positioning piece 74, the stop washer 4 can be positioned in contact, so that the stop washer 4 is always in contact with the locking nut.

[0025] As shown in Figure 1 , Figure 2 , Figure 3 shown, the end face of the telescopic rod 72 away from the stop washer 4 is fixedly connected with the guide block 73, the guide block 73 is slidably connected with the fixed frame 71, through the setting of the guide block 73, the telescopic rod 72 can be moved and guided, the elastic element 75 is provided with a plurality of, the plurality of elastic elements 75 are symmetrically distributed on the fixed frame 71, through the setting of the elastic element 75, the positioning piece 74 can be connected and used, a plurality of friction grooves 76 are formed in the surface of the positioning piece 74, the plurality of friction grooves 76 are uniformly distributed on the positioning piece 74, through the setting of the friction grooves 76, the good contact friction effect of the positioning piece 74 can be ensured.

[0026] The specific implementation process of the utility model is as follows: by pushing the stop washer 4 to be sleeved on the pump shaft body 1, the key piece 5 is slid into the key groove 3, the stop washer 4 is positioned and handled, under the action of the screw thread on the surface of the pump shaft body 1, the locking nut can be threadedly fixed, and the limiting protrusion 6 of the stop washer 4 is inserted into the limiting groove of the locking nut, the locking nut is limited, and then the pump shaft body 1 and the shaft coupling 2 are locked and handled;

[0027] When the stop washer 4 is in contact with the positioning piece 74, under the action of the positioning piece 74, the stop washer 4 can be positioned and handled again, and under the cooperation of the elastic element 75, the telescopic rod 72 and other structures, the stop washer 4 can drive the limiting protrusion 6 to be always engaged with the limiting groove of the locking nut, so that the good dynamic limiting effect can be ensured.

[0028] The key groove 3 and the key piece 5 are arranged, the stop washer 4 can be installed and used, and the locking nut with the limiting groove can be limited by the limiting protrusion 6, the phenomenon of thread loosening of the locking nut of the pump shaft bearing position is avoided, the problem of pump shaft falling is eliminated, the maintenance workload of the liquid pump for department production is reduced, the operation and maintenance cost is saved, the positioning piece 74 is arranged, the stop washer 4 can be positioned and tightly used, then the limiting protrusion 6 of the stop washer 4 is always clamped in the limiting groove of the locking nut, so that the good limiting effect is ensured, and under the deformation effect of the elastic member 75, the good dynamic contact effect of the stop washer 4 can be ensured.

[0029] It should be pointed out in advance that in the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0030] The above is only an embodiment of the present application, and the well-known specific structure and characteristics of the scheme are not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the present application. The protection scope claimed in the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A device for preventing the pump shaft of a submersible pump from falling off, comprising a pump shaft body, characterized in that: A coupling is provided at the lower end of the pump shaft body. A keyway is provided on the surface of the pump shaft body. A stop washer is slidably sleeved on the outer side of the pump shaft body. A key is fixedly connected to the inner side wall of the stop washer. The key is slidably connected to the keyway. A limit protrusion is fixedly connected to the outer side of the stop washer. A tightening mechanism is provided on the coupling.

2. The device for preventing the pump shaft of a submersible pump from falling off according to claim 1, characterized in that: The stop washer is circular in shape and is made of stainless steel.

3. The device for preventing the pump shaft of a submersible pump from falling off according to claim 1, characterized in that: The limiting protrusions are provided in multiple ways, and the multiple limiting protrusions are evenly distributed on the stop washer.

4. The device for preventing the pump shaft of a submersible pump from falling off according to claim 1, characterized in that: The clamping mechanism includes a fixed frame, the upper end of the coupling is fixedly connected to the fixed frame, the inner wall of the fixed frame is slidably connected to a telescopic rod, the end face of the telescopic rod near the stop washer is fixedly connected to a positioning piece, the positioning piece is in contact with the stop washer, the end face of the positioning piece is bonded with an elastic element, and the other end of the elastic element is in contact with the fixed frame.

5. The device for preventing the pump shaft of a submersible pump from falling off according to claim 4, characterized in that: A guide block is fixedly connected to the end face of the telescopic rod away from the stop pad, and the guide block is slidably connected to the fixing frame.

6. The device for preventing the pump shaft of a submersible pump from falling off according to claim 4, characterized in that: Multiple elastic elements are provided, and the multiple elastic elements are symmetrically distributed on the fixed frame.

7. The device for preventing the pump shaft of a submersible pump from falling off according to claim 4, characterized in that: The surface of the positioning piece is provided with multiple friction grooves, which are evenly distributed on the positioning piece.

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