CN202883447U

CN202883447U - Seal washing structure for sand pump halting

Info

Publication number: CN202883447U
Application number: CN 201220228392
Authority: CN
Inventors: 温刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-05-12
Filing date: 2012-05-12
Publication date: 2013-04-17
Anticipated expiration: 2022-05-12

Abstract

The utility model provides a seal cavity washing structure for a sand pump halting. The seal cavity washing structure for the sand pump halting is used for preventing damage to a mechanical seal 5 and a pump body 1 when the sand pump is started again. In order to achieve the goal, the seal washing structure for the sand pump halting comprises a circulating pipe 3, a seal box 4, the pump body 1 and a liquid-outlet pipe plug on the bottom of the pump body. A relatively independent seal cavity is formed between the seal box and a shaft, and the mechanical seal 5 is installed in the seal cavity. When the sand pump halts, circulating water enters the seal cavity from the circulating pipe 3, rinses crystallographic dry mud blocks in the seal cavity into space between blades and the seal box, flows into the pump body finally, and is discharged out of the pump body through a liquid-outlet hole on the bottom of the pump body, so that the reliability service of the mechanical seal when the sand pump is started again is guaranteed. Furthermore, a seal antifreezing structure is a structure that circulating hot water of a generator, passing into the pump cavity, is utilized to enable mud in the sand pump not to be frozen under a low temperature environment.

Description

Sand pump stop sealing flushing mechanism

Technical field

The utility model belongs to drilling well solid control equipment field, relates to a kind of sand pump and sealflushes structure.

Background technique

Drilling well solid controlling sand pump is when shutting down at present; there is following defective: the one, the Seal cage place forms sedimentation in the pump; and well-drilling sand pump is in hot summer and arid area; very easily make mud dried cake or the crystallization that deposits in the pump at high temperature; when again opening pump; crystals dried mud piece can seal in very fast damage, causes mechanical seal leakage, and failure of pump is shut down.The 2nd, be located in severe cold such as the job site, if retain mud in the sand pump, will be frozen in very soon in the pump housing and the Seal cage so, be split up the pump housing and sealing bad, if start pump this moment, the residual mud that freezes can freeze the rotating component of sand pump, causes motor overload and motor damage or causes off-axis.

The model utility content

The utility model purpose is to overcome existing issue, proposes a kind of sand pump stop sealing flushing mechanism, when pump is shut down, with in the pump and Seal cage in mud flush clean.

For reaching above-mentioned target, sand pump stop sealing flushing mechanism comprises that the discharge opeing plug of the pump housing, impeller, Circulation pipe, mechanical seal, Seal cage, pump housing bottom forms, the pump housing, sealed case, the outside Circulation pipe that connects.

Form a relatively independent Seal cage between sealed case and the axle,, mechanical seal wherein is installed.When termination of pumping, circulating water enters in the Seal cage from circulating pipe, the mud piece of Seal cage intercrystalline drying is flushed in the space between blade and the sealed case, flow at last in the pump housing, outage through pump housing bottom is discharged the pump housing, the reliable operation of mechanical seal in the time of can guaranteeing again to open pump like this.

The sealing antifreezing measure are to use the circulating hot water of generator to pass into uncongealable structure under the interior mud low temperature environment of the interior maintenance of pump chamber pump; After adopting sand pump to sealflush system and antifreezing measure, after the sand pump shutdown, the situation that or else bad seals and pump housing bursting by freezing can occur occurs, and assurance equipment continues the normal requirement of using.

Description of drawings

Fig. 1 is that sand pump is sealflushed system architecture and sand pump antifreezing measure structural representation

Below in conjunction with the drawings and specific embodiments the utility model is described further

1, the pump housing 2, impeller 3, Circulation pipe 4, sealed case 5, mechanical seal 6, back blade

7, axle

Among Fig. 1: form a relatively independent Seal cage between sealed case 4 and the axle 7, mechanical seal 5 wherein is installed.

Embodiment

When termination of pumping, circulating water enters in the Seal cage from Circulation pipe 3, the mud piece of Seal cage intercrystalline drying is flushed in the space between back blade 6 and the sealed case 4, in the last runner pump housing 1, outage through pump housing bottom is discharged the pump housing 1, the reliable operation of mechanical seal 5 in the time of can guaranteeing again to open pump like this.

When pump moves in the area of cold, in case termination of pumping then continues to pass into cycle of engine hot water with Circulation pipe 3, remaining in the Seal cage and do not freezing with the pump housing 1 interior mud, can not cause and freeze the bursting by freezing pump housing in the pump, and circulating hot water is finally discharged from the taphole of the pump housing 1 bottom.

Claims

1. a sand pump is sealflushed structure, it is characterized in that, comprise the discharge opeing plug of the pump housing (1), impeller (2), Circulation pipe (3), mechanical seal (5), sealed case (4), axle (7), pump housing bottom and the Seal cage that is consisted of by the pump housing (1), impeller (2), sealed case (4), axle (7), the pump housing (1), sealed case (4), the outside Circulation pipe (3) that connects.