CN203223354U

CN203223354U - Cylinder cover head

Info

Publication number: CN203223354U
Application number: CN 201320189143
Authority: CN
Inventors: 戴国俊
Original assignee: NANJING HENGDA COMPRESSOR CO Ltd
Current assignee: NANJING HENGDA COMPRESSOR CO Ltd
Priority date: 2013-04-16
Filing date: 2013-04-16
Publication date: 2013-10-02
Anticipated expiration: 2023-04-16

Abstract

The utility model discloses a cylinder cover head which comprises a cylinder cover and a valve seat. The valve seat is provided with a first outer circumference surface and a second outer circumference surface located on the periphery of the first outer circumference surface. The cylinder cover head is characterized in that the valve seat is welded with the cylinder cover, a first welding surface is formed between the front end of the first outer circumference surface of the valve seat and the valve seat, and a second welding surface is formed between the second outer circumference face of the valve seat and the valve seat. Compared with the prior art, the cylinder cover and the valve seat are welded to be a whole through the first welding surface and the second welding surface, namely, two complete sealing surfaces are arranged between the cylinder cover and the valve seat and after the cylinder cover and the valve seat are welded, sealing performance is good, and leakage does not exist.

Description

The cylinder headkerchief

Technical field:

The utility model relates to a kind of cylinder headkerchief, belongs to compression mechanism technology for making field.

Background technique:

Common compressor cylinder cover is made up of cylinder headkerchief and valve plate two-part, is connected on the cylinder by bolt, and middle with paper washer or rubber o-ring sealing, when the air pressure superelevation, sealing problem is difficult to solve, and seepage often occurs.

Summary of the invention:

Technical problem to be solved in the utility model is the deficiency that exists at above-mentioned prior art, and provides a kind of tightness good integrated cylinder cover head.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is:

A kind of cylinder headkerchief, comprise cylinder head and valve seat, described valve seat has first outer peripheral surface and is positioned at peripheral second outer peripheral surface of first outer peripheral surface, it is characterized in that: described valve seat and cylinder head welding, between the first outer peripheral surface front end of described valve seat and valve seat, form first face of weld, between second outer peripheral surface of described valve seat and valve seat, form second face of weld.

Offer for first molten bath of welding first face of weld and second molten bath that is used for welding second face of weld in described cylinder head.

A kind of processing method of cylinder head is characterized in that, step is as follows:

The first step, component processing: cylinder head and valve seat moulding, wherein cylinder head material adopts HT250, and valve seat has adopted 35Mn2;

Second step, face of weld cleaning: face of weld is removed greasy dirt, oxide layer;

The 3rd step, dress silver wire: wire spool is enclosed within face of weld;

The 4th the step, on first face of weld borax: be coated with borax at welding wire;

The 5th step, the valve seat cylinder head of packing into: valve seat is pressed in the cylinder head;

The 6th the step, on second face of weld borax: be coated with borax at welding wire;

The 7th step, welding; The cylinder head that coats borax is heated to 800～1000 ℃ that make wire melting with electric furnace, back cooling forming.

Compared with prior art, the utility model cylinder head and valve seat are welded into an integral body by first face of weld and second face of weld, and being equivalent to has the complete sealing surface of twice between cylinder head and valve seat, after the welding, and good airproof performance, ne-leakage.

The high pressure cylinder headkerchief, shape complexity in the cylinder head, air intake-exhaust all in cylinder head, is difficult for making integral body, after adopting this welding procedure, cylinder head material adopts HT250, has guaranteed castability and bubble-tight requirement, and valve seat has adopted 35Mn2, intensity and the wear resistance of valve seat have been guaranteed, namely having saved cost, satisfied usage requirement again, is a quantum jump in the technology of headkerchief.

Description of drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the A-A sectional drawing of Fig. 1.

Fig. 3 is valve seat construction schematic representation of the present utility model.

Wherein: 1, valve seat, 11, first outer peripheral surface, 12, second outer peripheral surface, 2, cylinder head, 3, first face of weld, 4, second face of weld, 5, first molten bath, 6, second molten bath.

Embodiment

Below in conjunction with accompanying drawing, the utility model is elaborated:

As shown in Figure 1 and Figure 2, the utility model cylinder headkerchief comprises valve seat 1 and cylinder head 2, and wherein valve seat 1 comprises round platform on valve body and the valve body, and the outer surface of valve body is first outer peripheral surface 11, and the outer surface of round platform is second outer peripheral surface 12, referring to Fig. 3.Valve seat 1 and cylinder head 2 are welded into an integral body by first face of weld 3 and second face of weld 4 that forms between first outer peripheral surface 11 and second outer peripheral surface and the cylinder head 2, for the ease of the welding of valve seat 1 and cylinder head 2, on cylinder head 2, also offer first molten bath 5 and second molten bath 6.

Cylinder head material is HT250, and good casting property can be born high flexural stress, and tensile stress can keep good air tightness, is fit to do the cylinder headkerchief.

Seat material 35Mn2 than the carbon content height of 30Mn2, thereby has higher intensity and better wear resistance, and hardenability also improves, and machinability is medium, generally uses under modified or normalized condition.

Solder wire material: stainless steel material 303,45% silver-base solders.

This solder silver content 45%, 660 °～725 ℃ of fusing points have good flowability and joint filling, the brazed seam any surface finish, the joint strength height, shock-resistant, be usually used in brazed copper and Cuprum alloy, steel and stainless steel etc.

Meet: GB/T10046-2008, model: BA ₉45CnZn.

Quite: AWS A5.8-2004, model: BA ₉-5

Specification: 2.5mm

Solder flux: QJ102 silver brazing solvent

This brazing flux is used in 600 °～850 ℃ temperature ranges and cooperates with silver-base solder, brazed copper and Cuprum alloy, carbon steel, stainless steel etc., and effectively the oxide on dissolution of metals surface encourages spreading of solder.

Accord with Q/JBAY13-2009, model: QJ102

Welding procedure: the face of weld cleaning: face of weld is removed greasy dirt, oxide layer;

Dress silver wire: wire spool is enclosed within face of weld;

Borax on first face of weld: be coated with borax at welding wire;

The valve seat cylinder head of packing into: valve seat is pressed in the cylinder head;

Borax on second face of weld: be coated with borax at welding wire;

Welding; The cylinder head that coats borax is heated to 800～1000 ℃ that make wire melting with electric furnace, back cooling forming.

Claims

1. cylinder headkerchief, comprise cylinder head and valve seat, described valve seat has first outer peripheral surface and is positioned at peripheral second outer peripheral surface of first outer peripheral surface, it is characterized in that: described valve seat and cylinder head welding, between the first outer peripheral surface front end of described valve seat and valve seat, form first face of weld, between second outer peripheral surface of described valve seat and valve seat, form second face of weld.

2. cylinder headkerchief according to claim 1 is characterized in that: offer for first molten bath of welding first face of weld and second molten bath that is used for welding second face of weld in described cylinder head.