CN113028074A

CN113028074A - Embedded combination connection's governing valve

Info

Publication number: CN113028074A
Application number: CN202110177723.9A
Authority: CN
Inventors: 闵玉苹; 宋正坤; 龚振华
Original assignee: Dresser Machinery Suzhou Co Ltd
Current assignee: Dresser Machinery Suzhou Co Ltd
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2021-06-25
Anticipated expiration: 2041-02-07
Also published as: CN113028074B

Abstract

The invention relates to the technical field of valves, and discloses an embedded combined and connected regulating valve which comprises a valve body, a valve seat, a valve rod, a hard alloy valve core and a valve core bushing, wherein a containing groove for containing the valve core bushing is arranged in the hard alloy valve core, the valve core bushing is embedded into the containing groove and is in interference fit with the containing groove, the valve core bushing is connected with the containing groove through brazing, an assembling groove is formed in the rear end of the valve core bushing, an internal thread is formed in the assembling groove, a first boss is arranged at the front end of the valve rod, and an external thread matched with the internal thread is formed in the first. The regulating valve in embedded combined connection has the advantages that the hard alloy valve core is adopted, the hard alloy valve core is connected with the valve rod by the valve core bushing, the connecting stability is good, the structural strength is high, the abrasion resistance and the scouring resistance of the valve core are good, the service life is long, frequent parking and replacement are avoided, the production efficiency is improved, and the operation and maintenance cost is reduced.

Description

Embedded combination connection's governing valve

Technical Field

The invention relates to the technical field of valves, in particular to an embedded combined and connected regulating valve.

Background

In applications with high erosion and particle erosion, such as coal slime, also referred to as "black and grey water", these media not only have a high concentration of erosion but also a certain amount of coal crystallization. The valve internals thereof need frequent shutdown and replacement due to abrasion and damage, which leads to the reduction of the production efficiency of the device and increases the operation and maintenance cost of the device. Therefore, the above problems are urgently needed to be solved.

Disclosure of Invention

The invention aims to provide an embedded combined connection regulating valve which is reasonable in structure, abrasion-resistant and long in service life.

In order to solve the problems, the invention provides an embedded combined and connected regulating valve which comprises a valve body, a valve seat, a valve rod, a hard alloy valve core and a valve core bushing, wherein a containing groove for containing the valve core bushing is formed in the hard alloy valve core, the valve core bushing is embedded in the containing groove and is in interference fit with the containing groove, the valve core bushing is connected with the containing groove through brazing, an assembling groove is formed in the rear end of the valve core bushing, an internal thread is formed in the assembling groove, a first boss is arranged at the front end of the valve rod, and an external thread matched with the internal thread is formed in the first boss.

As a further improvement of the invention, the front end of the valve rod is also provided with a second boss, the first boss is arranged on the second boss, the second boss is in a conical column shape with a small front end and a large rear end, and the rear end of the hard alloy valve core is also provided with a positioning groove matched with the second boss.

As a further improvement of the invention, the diameter of the bottom of the positioning groove is smaller than that of the front end of the second boss.

As a further improvement of the invention, the rear end of the hard alloy valve core is provided with a first annular connecting surface, the front end of the valve rod is provided with a second annular connecting surface, and the first annular connecting surface and the second annular connecting surface are in braze welding connection.

As a further improvement of the invention, the valve further comprises a hard alloy valve seat lining arranged in the valve seat, and the hard alloy valve seat lining is in interference fit with the valve seat.

As a further improvement of the invention, stellite cemented carbide is deposited in the valve seat.

As a further improvement of the invention, a packing and a guide bush are arranged between the valve rod and the valve body.

As a further improvement of the invention, the number of the guide bushings is two, and a bushing spacer ring is arranged between the two guide bushings.

As a further improvement of the invention, the inner flow passage of the valve body is arc-shaped.

As a further development of the invention, the valve seat is a venturi valve seat.

The invention has the beneficial effects that:

the regulating valve in embedded combined connection has the advantages that the hard alloy valve core is adopted, the hard alloy valve core is connected with the valve rod by the valve core bushing, the connecting stability is good, the structural strength is high, the abrasion resistance and the scouring resistance of the valve core are good, the service life is long, frequent parking and replacement are avoided, the production efficiency is improved, and the operation and maintenance cost is reduced.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view of the overall structure of a regulating valve with embedded combination connection in the preferred embodiment of the invention;

FIG. 2 is a schematic illustration of the assembly of a cemented carbide insert, insert bushing and valve stem in a preferred embodiment of the invention;

FIG. 3 is a schematic structural diagram of a cemented carbide valve element in a preferred embodiment of the invention;

FIG. 4 is a schematic diagram of the construction of the cartridge bushing in the preferred embodiment of the invention;

FIG. 5 is a schematic illustration of the construction of the valve stem in the preferred embodiment of the present invention;

FIG. 6 is a schematic view of the construction of a valve seat in a preferred embodiment of the invention;

fig. 7 is an enlarged schematic view of the structure at a in fig. 1.

Description of the labeling: 10. a valve body; 20. a valve seat; 21. a cemented carbide valve seat liner; 22. stellite cemented carbide; 30. a valve stem; 31. a first boss; 32. a second boss; 33. a second annular connecting surface; 40. a hard alloy valve core; 41. accommodating grooves; 42. positioning a groove; 43. a first annular connecting surface; 50. a spool bushing; 51. assembling a groove; 60. brazing; 70. a filler; 80. a guide bush; 90. a bushing spacer ring.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

As shown in fig. 1, the regulating valve of the preferred embodiment of the present invention is a built-in combination connection regulating valve, which comprises a valve body 10, a valve seat 20 and a valve rod 30.

As shown in fig. 2 to 5, the adjusting valve of the embedded combination connection in the preferred embodiment of the present invention further includes a hard alloy valve core 40 and a valve core bush 50, wherein a receiving groove 41 for receiving the valve core bush 50 is formed in the hard alloy valve core 40, the valve core bush 50 is embedded in the receiving groove 41 and is in interference fit with the receiving groove 41, and the valve core bush 50 and the receiving groove 41 are further connected by a brazing solder 60, so as to ensure stability between the valve core bush 50 and the hard alloy valve core 40. The rear end of the valve core bush 50 is provided with an assembly groove 51, the assembly groove 51 is provided with internal threads, the front end of the valve rod 30 is provided with a first boss 31, and the first boss 31 is provided with external threads matched with the internal threads. When assembling, the first boss 31 is screwed in the assembling groove 51.

The regulating valve with the embedded combination connection has the advantages that the hard alloy valve core 40 is adopted, the valve core bushing 50 is adopted to connect the hard alloy valve core 40 with the valve rod 30, the connection stability is good, the structural strength is high, the valve core has good abrasion resistance and erosion resistance, the service life is long, frequent parking and replacement are avoided, the production efficiency is improved, and the operation and maintenance cost is reduced.

In some embodiments, the front end of the valve rod 30 is further provided with a second boss 32, the first boss 31 is arranged on the second boss 32, the second boss 32 is in a conical column shape with a small front end and a large rear end, and the rear end of the cemented carbide valve core 40 is further provided with a positioning groove 42 matched with the second boss 32. When the second boss 32 in the shape of a cone column is assembled with the positioning groove 42, the gap between the second boss and the positioning groove can be reduced, and the connection stability and the structural sealing performance are ensured.

Optionally, the diameter of the bottom of the positioning slot 42 is smaller than the diameter of the front end of the second boss 32. When first boss 31 and assembly groove 51 spiro union, guarantee that second boss 32 can further support tightly with constant head tank 42, further promote structural stability and leakproofness.

In some embodiments, the rear end of the cemented carbide valve core 40 is provided with a first annular connecting surface 43, the front end of the valve rod 30 is provided with a second annular connecting surface 33, and the first annular connecting surface 43 and the second annular connecting surface 33 are connected through brazing 60. Further ensuring the structural strength and the connection stability.

In some embodiments, as shown in FIG. 6, the flush-type combination connected regulator valve further comprises a cemented carbide seat liner 21 disposed within the valve seat 20, the cemented carbide seat liner 21 having an interference fit with the valve seat 20. The hard alloy valve seat lining 21 can work in cooperation with the hard alloy valve core 40, so that the corrosion resistance and the flushing resistance are ensured, and the service life of the valve internals is prolonged.

In some embodiments, stellite cemented carbide 22 is deposited on the valve seat 20 to harden the full flow channel in the valve seat 20, so as to further improve and ensure the corrosion resistance and the erosion resistance of the regulating valve, and prolong the service life of the regulating valve.

As shown in fig. 7, in some embodiments, a packing 70 and a guide bushing 80 are disposed between the valve stem 30 and the valve body 10. Optionally, the guide bushings 80 are provided with two guide conical surfaces, and a bushing spacer 90 is further disposed between the two guide bushings 80. Double guiding can be realized, good guiding effect is provided for the operation of the hard alloy valve core 40, and vibration and abrasion of the valve inner parts caused by medium impact are reduced.

In one embodiment, the inlet flange surface and the outlet flange surface of the valve body 10 are 90 degrees, and the flow passage in the valve body 10 is arc-shaped. So that the valve body 10 has a lower fluid resistance and provides a better flow-through performance for the valve. Optionally, the flow passage in the valve body 10 adopts a long bending diameter design, so that the fluid resistance is further reduced.

Optionally, the valve seat 20 is a venturi valve seat 20.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.

Claims

1. The utility model provides an embedded built-up connection's governing valve, includes valve body, disk seat, valve rod, its characterized in that still includes carbide case and case bush, be equipped with in the carbide case and hold the holding tank of case bush, case bush embedding in the holding tank and with holding tank interference fit, the case bush with still through brazed connection between the holding tank, the rear end of case bush is equipped with the assembly groove, the assembly groove is equipped with the internal thread, the front end of valve rod is equipped with first boss, be equipped with on the first boss with interior screw-thread fit's external screw thread.

2. The embedded combination-connected regulating valve according to claim 1, wherein the front end of the valve rod is further provided with a second boss, the first boss is arranged on the second boss, the second boss is in a conical column shape with a small front end and a large rear end, and the rear end of the hard alloy valve core is further provided with a positioning groove matched with the second boss.

3. The built-in combination linked regulator valve of claim 2 wherein the diameter of the bottom of said detent groove is less than the diameter of the forward end of said second boss.

4. The embedded type combination connected regulating valve according to claim 2, wherein the rear end of the hard alloy valve core is provided with a first annular connecting surface, the front end of the valve rod is provided with a second annular connecting surface, and the first annular connecting surface and the second annular connecting surface are connected by brazing.

5. The embedded modular connected regulator valve of claim 1, further comprising a cemented carbide seat liner disposed within the valve seat, the cemented carbide seat liner being an interference fit with the valve seat.

6. The flush-type gang-connected regulator valve of claim 1, wherein stellite is deposited in the valve seat.

7. The built-in modular linked control valve of claim 1 wherein packing and guide bushings are provided between the valve stem and the valve body.

8. The built-in combination-connected regulating valve as claimed in claim 1, wherein the number of the guide bushes is two, and a bush spacer ring is further provided between the two guide bushes.

9. The drop in demand combination regulator valve of claim 1, wherein the valve body internal flow passage is arcuate.

10. The built-in combination connected regulator valve of claim 1 wherein said valve seat is a venturi valve seat.