CN2608723Y

CN2608723Y - Thermal insulating screw pump

Info

Publication number: CN2608723Y
Application number: CNU032204698U
Authority: CN
Inventors: 沈訚
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-03-18
Filing date: 2003-03-18
Publication date: 2004-03-31
Anticipated expiration: 2013-03-18

Abstract

The utility model discloses a thermal-insulating screw pump, which comprises a pump body, a pump sleeve, an active screw, a passive screw, a mechanical sealing cavity, linings of the active and the passive screws, an importing opening and a discharging opening for thermal-insulating liquid, wherein the inner axial direction of the wall of the pump body is provided with a through hole of which both ends are not enclosed, and annular grooves which are communicated with the through hole, and the importing opening and the discharging opening for thermal-insulating liquid are arranged on flange faces of both ends of the pump body to form a heat transfer loop. The flange faces of both of the two ends of the pump body are respectively and compactly fixed with a flange face of the pump sleeve and a flange face of the mechanical sealing cavity. The utility model provides a thermal-insulating screw pump having the advantages of good producing technique and reliable sealing effects. The thermal-insulating screw pump is widely suitable for the industrial departments, such as metallurgy, oilfield, chemical industry, textile, road construction, etc., to convey lubricity media.

Description

Thermal insulation screw pump

One, technical field

The utility model relates to a kind of volume type screw pump, particularly a kind of Thermal insulation screw pump with heating and cooling function.

Two, background technique

In order to solve the problem that can not normally carry owing to there is not heat insulation function that existing screw pump exists when the big medium of transport viscosity, the applicant has applied for " novel heat insulation screw pump " on October 29th, 1996 to Patent Office of the People's Republic of China, and the patent No. is ZL96223955.0.This Thermal insulation screw pump utilizes heat insulation liquid or gas that pump is heated or cools off, and makes the screw pump no matter can both proper functioning under what temperature.Through practice for many years, find that this novel heat insulation screw pump has the following disadvantages: 1, the formation of stepped shaft seal, require two stepped shaft parts to cooperate time error very little, difficulty is accomplished in actual manufacturing, the part non-interchangeability brings difficulty for batch process and maintenance simultaneously; 2, to the through hole of closed at both ends, because the hole is that boring obtains on the pump housing of cast form, when the pump housing is very long, the hole just almost can't process, in addition, because the defective of foundry goods Organizational Structure, insulation Kong Weijian leaks when bringing into use, and leaks but often produce in use from now on; 3, to be contained in the pump housing be to compress by bonnet to pump block, prevents that pump block from rotating, and this fixed structure is run in fed sheet of a media when containing the granule foreign matter, and poor reliability seems.

Three, summary of the invention

It is good that the purpose of this utility model provides a kind of production technology, is convenient to processing and maintenance, the more reliable Thermal insulation screw pump of sealing effect.

The purpose of this utility model is to realize like this, it comprises the pump housing, pump block, the active screw rod, driven screw rod, the mechanical seal cavity, bearing support, principal and subordinate's screw rod lining, heat insulation liquid inlet opening and exhaust port, initiatively screw rod and driven screw rod place in the pump block, pump block places in the pump housing, the mechanical seal cavity is set in place in the input end of the active screw rod in the active chamber outside and places in the pump housing, bearing support is arranged on the exterior edge face of mechanical seal cavity, initiatively screw rod is supported by the principal and subordinate's screw rod lining that is installed in the rolling bearing in the bearing support and be installed in the pump block, bonnet is fixed on the pump block, be axially arranged with the through hole that two ends are not sealed in that pump is intraparietal, the flanged surface at pump housing two ends is provided with through hole and insulation liquid and imports and exports the circular groove that communicates and form heat transfer loop, and the flanged surface at pump housing two ends is closely fixed with the flanged surface of pump block and the flanged surface of mechanical seal cavity respectively.

Described through hole can be that precasting is at the intraparietal seamless steel pipe of pump.

The utility model compared with prior art, its advantage is: 1, the circular groove on pump housing both ends of the surface sealing adopts flanged surface to cooperate, and easy processing has interchangeability, is easy to produce in batches and maintenance; 2, the through hole that do not seal of one group of two ends being provided with of the pump housing can be finished by the seamless steel pipe of precasting on assigned position on the pump housing, when the pump housing is very long, the hole also is easy to processing, and can prevent the defective of foundry goods Organizational Structure better, avoids producing in use from now on the leakage in insulation hole; 3, pump block and bonnet are fixed together, and can prevent more effectively that pump block from rotating good reliability.

Four, description of drawings

Fig. 1 is an axial section structural representation of the present utility model.

Fig. 2 is a cross section structure schematic representation of the present utility model.

Five, embodiment

The Thermal insulation screw pump that the utility model is made, it comprises the pump housing 1, pump block 2, active screw rod 3, driven screw rod 4, mechanical seal cavity 5, bearing support 6, principal and subordinate's screw rod lining 7, bonnet 11, retaining pad 14, heat insulation liquid inlet opening 8 and exhaust port 9, initiatively screw rod 3 and driven screw rod 4 place in the pump block 2, pump block 2 places in the pump housing 1, be axially arranged with the through hole 12 that does not seal at 4 two ends in that pump is intraparietal, on the flanged surface at the pump housing 1 two ends, respectively be provided with through hole 12 and insulation liquid and import and export 8,9 communicate and form the circular groove 13 of heat transfer loop, the circular groove sealing is to be fixed by bolts on the pump housing 1 both ends of the surface flange by pump block 2 flanged surfaces and mechanical seal cavity 5 flanged surfaces that match with it, surface of contact is provided with gasket seal, has so just formed the heat insulation work cavity of sealing.Mechanical seal cavity 5 outboard bearing bodies 6 are set in place in the input end of the active screw rod 3 in the active chamber outside and place in the pump housing 1, are with annular lagging 15 on bearing support 6, are provided with the annular through-hole 16 of tape input mouth and delivery outlet in this annular lagging.Initiatively screw rod 3 is supported by the principal and subordinate's screw rod lining 7 that is installed in the rolling bearing 10 in the bearing support 6 and be installed in the pump block 2, and initiatively the axial seal of screw rod 3 extensions is finished by the mechanical seal in the mechanical seal cavity 5.The front end of driven screw rod 4 is supported by pump block 2, the rear end is supported by principal and subordinate's screw rod lining 7, the axial force of driven screw rod 4 is by the hydraulic resistance balance of introducing in retaining pad 14 and the pump block 2, bonnet 11 is screwed on pump block 2, limit the axial displacement of principal and subordinate's screw rod lining 7, and born the very little residual axial force that is not balanced.

Claims

1, a kind of Thermal insulation screw pump, comprise the pump housing (1), pump block (2), active screw rod (3), driven screw rod (4), mechanical seal cavity (5), bearing support (6), principal and subordinate's screw rod lining (7), heat insulation liquid inlet opening (8) and exhaust port (9), initiatively screw rod (3) and driven screw rod (4) place in the pump block (2), pump block (2) places in the pump housing (1), mechanical seal cavity (5) is set in place in the input end of the active screw rod (3) in the active chamber outside and places in the pump housing (1), bearing support (6) is arranged on the exterior edge face of mechanical seal cavity (5), initiatively screw rod (3) is supported by the principal and subordinate's screw rod lining (7) that is installed in the rolling bearing (10) in the bearing support (6) and be installed in the pump block (2), bonnet (11) is fixed on the pump block (2), it is characterized in that: the through hole (12) that being axially arranged with in the pump housing (1) wall do not seal at two ends, the flanged surface at the pump housing (1) two ends is provided with through hole (12) and insulation liquid and imports and exports (8,9) communicate and form the circular groove (13) of heat transfer loop, the flanged surface at the pump housing (1) two ends is closely fixing with the flanged surface of the flanged surface of pump block (2) and mechanical seal cavity (5) respectively.

2, brand-new Thermal insulation screw pump according to claim 1 is characterized in that: described through hole (12) is that precasting is at the intraparietal seamless steel pipe of pump.