Valve components and method of assembly therefor
The invention provides a method of, and means for, connecting components of a moveable sub-assembly in a fluid control valve. To control a dimensional characteristic of the moveable sub-assembly, a first component of the sub-assembly can be crimped to create a mechanical connection to a second component of the moveable sub-assembly. The sub-components may be configured such that in the absence of the crimp they can be moveably translated between a plurality of positions and they may be slideably translatable between a number of relative positions, while the crimp acts, once formed, to retain the sub-components in a chosen position relative to one another.
1. A valve, comprising:
a first fluid port;
a second fluid port;
an orifice providing a fluid connection between the first and second fluid ports;
a moveable sub-assembly, moveable between a first position in which the fluid connection is open and a second position in which the fluid connection is closed by the moveable sub-assembly;
the moveable sub-assembly comprising first and second sub-components, the first and second sub-components being mechanically connected by a crimp to fix a position of the first sub-component relative to the second sub-component,
wherein the second sub-component comprises one or more openings configured to enable access to a crimping region to form the crimp.
2. The valve according to claim 1 , further comprising a valve seat disposed about the orifice; the valve seat being configured to engage the moveable sub-assembly in the second position, the moveable sub-assembly preferably further comprising a sealing portion configured to seal the valve seat to close the fluid connection between the first and second ports.
3. The valve according to claim 1 , wherein the first sub-component is a shaft received at least partially within the second sub-component.
4. The valve according to claim 1 , wherein the second sub-component comprises two openings, the two openings being arranged on substantially opposite sides of the second sub-component.
5. The valve according to claim 1 , wherein the second sub-component is configured to receive an actuating force of an actuator of a valve.
6. The valve according to claim 1 , wherein the second sub-component is connected to an actuator of the valve.
7. The valve according to claim 1 , wherein the first sub-component is at least partially received inside the second sub-component, and wherein the crimp is a mechanical deformation directly formed on the first sub-component.
8. A method of forming a moveable valve sub-assembly for a fluid control valve comprising the steps of:
providing first and second sub-components for a moveable subassembly of a fluid control valve;
adjusting a position of the first and second sub-components relative to one another; and
forming a crimp on one of the first and second sub-component to fix their relative positions in at least a first direction, wherein the second sub-component comprises one or more openings;
inserting at least one crimping tool into the one or more openings.
9. The method according to claim 8 , further comprising the step of
measuring the relative positions of the first and second sub-components in at least a first direction prior to forming the crimp.
10. The method according to claim 8 , further comprising the step of:
inserting the first sub-component at least partially into the second sub-component; and
forming the crimp on the first sub-component within the second sub-component.
11. The method according to claim 8 , wherein the crimp is formed directly on the first sub-component by a crimping tool.
12. The method according to claim 8 , wherein the second sub-component comprises at least two openings, the two openings being arranged on substantially opposite sides of the second sub-component.
13. The method according to claim 8 , wherein the first sub-component is a shaft of a valve.