High-sealing-performance component for centrifugal pump

Abstract

The utility model discloses a high sealing member for a centrifugal pump, which relates to the field of centrifugal pumps, and adopts the technical scheme that the high sealing member comprises a centrifugal pump body and a turbine component mounted on one side of the centrifugal pump body, a driving shaft is connected inside the centrifugal pump body, a sealing cylinder is detachably connected between the centrifugal pump body and the turbine component, and the sealing cylinder is connected with the centrifugal pump body. A shaft body channel allowing a centrifugal pump body rotating shaft to pass through is formed in the middle of the sealing barrel, a hollow area is formed between the shaft body channel and the inner wall of the sealing barrel, a through groove is formed in the end, facing the turbine assembly, of the sealing barrel, a rubber sealing plate is fixed in the through groove, and a driving piece abutting against the rubber sealing plate is arranged in the hollow area. And the rubber sealing plate is attached to the connecting inlet of the rotating shaft and the turbine assembly after being pressed against, so that the high sealing performance is achieved, and the effect of selective application is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal pump's technical field, specifically is a high sealing component for centrifugal pump. BACKGROUND

[0002] Centrifugal pump refers to the pump that water is transported by centrifugal force produced when impeller rotates, and works by centrifugal motion of water caused by impeller rotation, before starting, the pump shell and the suction pipe must be filled with water, then start the motor, make the pump shaft drive the impeller and water to rotate at high speed, water is centrifuged to the outer edge of the impeller, and flows into the water pump pressure pipe through the flow channel of the volute pump shell, however, the sealing structure is an indispensable part of the centrifugal pump.

[0003] The centrifugal pump usually adopts different sealing structures to ensure that the pump does not leak during work, usually mechanical seal, packing seal and magnetic seal, mechanical seal is a commonly used sealing device, widely used in various industrial fields, its working principle is based on the static seal between two rotating parts, which prevents medium leakage by contact between sealing surfaces, mechanical seal is usually composed of two parts of fixed ring and rotating ring, wherein the fixed ring is fixed on the static part, and the rotating ring is fixed on the rotating part, at the same time, the internal elements of mechanical seal are degraded or damaged after long-term operation, which need to be replaced or repaired regularly to achieve the purpose of reuse.

[0004] The mechanical seal structure of the existing centrifugal pump usually adopts mechanical seal, which prevents water leakage by contact between the internal static ring and the rotating ring, has the advantages of long service life, good sealing performance and high safety, but the structure is relatively complex, the whole pump body needs to be disassembled every time for maintenance, and the whole process is time-consuming and laborious, and the maintenance cost is high, at the same time, when the existing sealing structure leaks, the internal water is splashed outward under the action of pressure, which not only affects the normal operation of the centrifugal pump, but also affects the surrounding environment, needs to stop and take emergency measures, thereby reducing the working efficiency of the centrifugal pump. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a high sealing performance and a centrifugal pump with high sealing performance.

[0006] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0007] The centrifugal pump body is internally connected with a driving shaft, a sealing cylinder is detachably connected between the centrifugal pump body and the turbine assembly, a shaft body passage for the rotating shaft of the centrifugal pump body is arranged in the middle of the sealing cylinder, a hollow area is formed between the shaft body passage and the inner wall of the sealing cylinder, a through slot is arranged at the end of the sealing cylinder facing the turbine assembly, a rubber sealing plate is fixed in the through slot, a driving member is arranged in the hollow area and abuts against the rubber sealing plate, and the rubber sealing plate is attached to the connecting inlet of the rotating shaft and the turbine assembly after being abutted.

[0008] Further, flanges are welded at both ends of the sealing cylinder, one of the flanges is screwed with the centrifugal pump body, and the other flange is screwed with the turbine assembly.

[0009] Further, the rubber sealing plate is abutted with an abutting plate close to the shaft body passage, the end of the abutting plate facing the rubber sealing plate is provided in a dome shape, the end of the abutting plate away from the rubber sealing plate is fixed with an abutting rod, and a plurality of abutting rods are arranged along the circumferential direction of the shaft body passage.

[0010] By adopting the above technical scheme, the abutting plate is arranged in a ring shape, the rubber sealing plate can be completely abutted at the sealing position, and the sealing performance is improved.

[0011] Further, the driving member comprises an abutting disc fixed on the end face of the abutting rod, a horizontal rod is fixed on the side face of the abutting disc, a connecting rod is hingedly connected below the abutting disc, the other end of the connecting rod is hingedly connected with a sliding seat, the sliding seat slides along the outside of the horizontal rod, a driving rod is connected to the end of the sliding seat away from the abutting disc, a fixed rod is fixed in the driving rod and arranged on the inner wall of the sealing cylinder, the driving rod slides along the fixed rod, and a driving disc is further fixed on the outside of the driving rod.

[0012] By adopting the above technical scheme, the driving structure is simple and convenient to operate, manual control is not required during work, and the labor intensity is reduced.

[0013] Further, a spiral pipe is fixed between the driving disc and the inner wall of the sealing cylinder, an air inlet pipe is connected to the side face of the spiral pipe, a plurality of through holes are arranged on the side face of the spiral pipe, the air inlet pipe extends out of the side face of the sealing cylinder, and an air valve is fixed on the extending end of the air inlet pipe.

[0014] By adopting the above technical scheme, air is conveniently introduced into the sealing cylinder, the spiral pipe is used to guide the air, the air is uniformly guided, and the driving disc is stably moved.

[0015] Further, a reinforcing steel plate is covered on the outside of the shaft body passage and fixed in the sealing cylinder. By adopting the above technical scheme, the reinforcing steel plate can protect the shaft body passage, prevent the shaft body passage from being extruded in a pressurized environment, and further ensure the normal work of the driving shaft.

[0016] In summary, the beneficial technical effects of the centrifugal pump are as follows:

[0017] 1、The sealing cylinder is adopted, convenient to disassemble and wash, and the internal rubber sealing plate is used for sealing, and the rubber sealing plate is abutted and attached to the position where the driving shaft enters the turbine assembly through the abutment rod arranged internally, so that the sealing performance is effectively improved.

[0018] 2、The spiral pipeline is adopted, the air in the sealing cylinder is conveniently introduced, the air is introduced by the spiral pipeline, the air is uniformly introduced, and the driving disc is stably moved.

[0019] 3、The reinforcing steel plate is adopted, the reinforcing steel plate can protect the shaft channel, avoids extruding the shaft channel in the pressurized environment, and further ensures the normal work of the driving shaft. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings are used to provide further understanding of the present application, and constitute a part of the specification, and do not constitute a limitation of the present application. In the drawings:

[0021] Fig. 1 is a structure schematic view of the high sealing performance component for the centrifugal pump provided by the embodiment;

[0022] Fig. 2 is a sectional view schematic view of the sealing cylinder of the high sealing performance component for the centrifugal pump provided by the embodiment.

[0023] In the drawings, 1 is a centrifugal pump body, 2 is a turbine assembly, 3 is a sealing cylinder, 4 is a shaft channel, 5 is a through groove, 6 is a rubber sealing plate, 7 is a flange plate, 8 is an abutment plate, 9 is an abutment rod, 10 is an abutment disc, 11 is a cross rod, 12 is a sliding seat, 13 is a connecting rod, 14 is a driving rod, 15 is a fixed rod, 16 is a driving disc, 17 is a spiral pipeline, 18 is an air inlet pipe, 19 is an air valve, and 20 is a reinforcing steel plate. DETAILED DESCRIPTION

[0024] The present application will be further described in detail below with reference to the drawings.

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0026] Please refer to Figs. 1-2The utility model provides technical scheme: including centrifugal pump body 1 and the turbine assembly 2 of installation in centrifugal pump body 1 one side, the inside connection of centrifugal pump body 1 has drive shaft, the detachable connection of centrifugal pump body 1 with turbine assembly 2 has sealing cylinder 3, the middle part of sealing cylinder 3 is equipped with the shaft body passageway 4 for centrifugal pump body 1 rotating axle, and the hollow region between shaft body passageway 4 and sealing cylinder 3 inner wall, sealing cylinder 3 towards turbine assembly 2 end is equipped with through slot 5, and through slot 5 inside fixed has the rubber sealing plate 6, and the drive piece of being located hollow region inside is equipped with the rubber sealing plate 6, and the rubber sealing plate 6 is adhered and is pasted in rotating axle and turbine assembly 2 connection entry place after being touched.

[0027] The both ends of sealing cylinder 3 are welded with flange plate 7, one of flange plate 7 and centrifugal pump body 1 between screw connection, and the other flange plate 7 and turbine assembly 2 screw connection, overall convenient installation.

[0028] The rubber sealing plate 6 is close to the side of shaft body passageway 4 and is touched with the contact plate 8, and the contact plate 8 is round top setting towards the rubber sealing plate 6 end, and the contact plate 8 is fixed with the contact rod 9 away from the rubber sealing plate 6 end, and the contact rod 9 is equipped with several along the circumferential direction of shaft body passageway 4.

[0029] The drive piece includes the contact disc 10 fixed in the end surface of contact rod 9, the lateral surface of contact disc 10 is fixed with the cross bar 11, and the contact disc 10 is hinged with the connecting rod 13 below the cross bar 11, and the other end of connecting rod 13 is hinged and is connected with the sliding seat 12, and the sliding seat 12 slides along the outside of cross bar 11, and the sliding seat 12 is connected with the drive rod 14 away from the contact disc 10 end, and the inside of drive rod 14 is equipped with the fixed rod 15 fixed on the inner wall of sealing cylinder 3, and drive rod 14 slides along fixed rod 15, and drive rod 14 is further fixed with the drive disc 16 outside.

[0030] The drive disc 16 is fixed with the spiral pipe 17 between the inner wall of sealing cylinder 3, and the lateral surface of spiral pipe 17 is connected with the air inlet pipe 18, and the lateral surface of spiral pipe 17 is equipped with several through holes, and the air inlet pipe 18 extends along the lateral surface of sealing cylinder 3, and the extending end is fixed with the air valve 19.

[0031] After the air valve 19 is opened, the external air pump is connected, and the air is introduced into the inside of spiral pipe 17, and then the air enters the inside of sealing cylinder 3 along the through hole, and the gas enters, and the position between drive disc 16 and sealing cylinder 3 is pressurized, so that drive disc 16 moves along fixed rod 15, and then the drive rod 14 moves forward, and along with the forward movement of drive rod 14, the drive rod 14 can touch and move the sliding seat 12, and the sliding seat 12 touches and moves the contact disc 10, and the contact disc 10 drives the contact rod 9 to move and touch on the rubber sealing plate 6, and because of the setting of the round top of the front end of contact rod 9, the rubber sealing plate 6 can be pushed out of the arc convex, and the arc convex is pasted in the drive shaft and turbine assembly 2, and the place is sealed.

[0032] The air pump connected with the air valve 19 is connected in series with the centrifugal pump, and the air pump is opened synchronously after the centrifugal pump is opened.

[0033] The shaft body channel 4 is covered with a reinforcing steel plate 20 fixed inside the sealing cylinder 3, which can protect the shaft body channel 4 from being extruded in a pressurized environment, thereby ensuring the normal operation of the drive shaft.

[0034] The working principle of the utility model is as follows: since the centrifugal pump works by driving the turbine to rotate through the drive shaft, there is a leakage point at the position where the drive shaft enters the turbine assembly 2, in the embodiment, a sealing cylinder 3 connected through a flange is arranged between the drive shaft and the turbine assembly 2, and the internal rubber sealing plate 6 is used for sealing, the rubber sealing plate 6 is abutted and adhered to the position where the drive shaft enters the turbine assembly 2 through the abutting rod 9 arranged inside, thereby effectively improving the sealing performance.

[0035] It should be noted that in this document, the terms "first" and "second" and the like are used merely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements recited, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the utility model, and is not intended to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A high sealing member for a centrifugal pump, comprising a centrifugal pump body (1) and a turbine assembly (2) installed on one side of the centrifugal pump body (1), a driving shaft being connected inside the centrifugal pump body (1), characterized in that, The detachable connection between the centrifugal pump body (1) and the turbine assembly (2) has a sealing cylinder (3), the middle part of the sealing cylinder (3) is provided with an axle body channel (4) for the rotating shaft of the centrifugal pump body (1), the axle body channel (4) and the inner wall of the sealing cylinder (3) are hollow, the end of the sealing cylinder (3) facing the turbine assembly (2) is provided with a through slot (5), the inside of the through slot (5) is fixed with a rubber sealing plate (6), the inside of the hollow area is provided with a driving element abutting against the rubber sealing plate (6), and the rubber sealing plate (6) is attached to the connecting inlet of the rotating shaft and the turbine assembly (2) after being abutted.

2. A high sealing member for a centrifugal pump according to claim 1, characterized in that: The both ends of the sealing cylinder (3) are welded with flanges (7), one of the flanges (7) is connected with the centrifugal pump body (1) by screws, and the other flange (7) is connected with the turbine assembly (2) by screws.

3. A high sealing member for a centrifugal pump according to claim 1, characterized in that: The rubber sealing plate (6) is abutted with an abutting plate (8) near the side of the axle body channel (4), the end of the abutting plate (8) facing the rubber sealing plate (6) is provided with a dome, the end of the abutting plate (8) away from the rubber sealing plate (6) is fixed with an abutting rod (9), and the abutting rod (9) is provided with a plurality of abutting rods (9) along the circumferential direction of the axle body channel (4).

4. A high sealing member for a centrifugal pump according to claim 3, characterized in that: The driving element includes an abutting disc (10) fixed on the end face of the abutting rod (9), a cross rod (11) fixed on the side face of the abutting disc (10), a connecting rod (13) hinged below the abutting disc (10) at the cross rod (11), a sliding seat (12) hinged at the other end of the connecting rod (13), the sliding seat (12) sliding along the outside of the cross rod (11), a driving rod (14) connected to the end of the sliding seat (12) away from the abutting disc (10), a fixed rod (15) provided in the driving rod (14) and fixed on the inner wall of the sealing cylinder (3), the driving rod (14) sliding along the fixed rod (15), and a driving disc (16) fixed on the outside of the driving rod (14).

5. A high sealing member for a centrifugal pump according to claim 4, characterized in that: The driving disc (16) and the inner wall of the sealing cylinder (3) are fixed with a spiral pipe (17), the side of the spiral pipe (17) is connected with an air inlet pipe (18), the side of the spiral pipe (17) is provided with a plurality of through holes, the air inlet pipe (18) extends out of the side of the sealing cylinder (3), and the extending end is fixed with an air valve (19).

6. A high sealing member for a centrifugal pump according to claim 1, characterized in that: The outside of the axle body channel (4) is covered with a reinforcing steel plate (20) fixed in the sealing cylinder (3).

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