CN212407603U

CN212407603U - Hard alloy wellhead valve rod assembly

Info

Publication number: CN212407603U
Application number: CN202020819137.0U
Authority: CN
Inventors: 李威; 史恋涛; 陈一铭
Original assignee: Guanghan Hongda Carbide Solution Co ltd
Current assignee: Guanghan Hongda Carbide Solution Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2021-01-26
Anticipated expiration: 2030-05-15

Abstract

The utility model discloses a hard alloy wellhead valve rod component, which comprises a valve rod (1) and a valve core; the valve is characterized in that the front end of the valve rod (1) is a hollow cavity; the valve core comprises a valve head (2) and a traction piece which penetrates through the valve head (2) and then extends into a cavity body of the valve rod (1). The utility model discloses be detachable construction with the valve rod assembly design, set up the front end of valve rod into the cavity body, pass through the mode of screw thread with the case and install at the cavity of valve rod internal to adopt the lockpin to fix, ensure the stable performance that valve rod assembly used, thereby effectual solved current carbide well head valve rod assembly need whole change, change inconvenient problem at case wearing and tearing or damage.

Description

Hard alloy wellhead valve rod assembly

Technical Field

The utility model relates to a carbide system valve rod technical field specifically provides a carbide well head valve stem assembly.

Background

Cemented carbide wellhead stem assemblies are important components of valves, which typically include a stem and an alloy valve core. The valve rod assembly is not only a moving part and a stressed part in the opening and closing process of the valve, but also the valve core is used as a main part for sealing the valve. In use, the valve core is impacted and corroded by media and generates friction with the filler, so that the valve core needs to be replaced after being used for a certain time in order to ensure the sealing effect of the valve.

However, the valve rod assembly that the valve on the existing market adopted is mostly the integral type structure, need change whole valve rod assembly when changing the case, or weld the new case of dress again at the valve rod after cutting case and valve rod, this not only very big waste that has caused the resource has increased use cost, and it is also very inconvenient to change the operation.

Therefore, it is urgent to develop a cemented carbide wellhead valve stem assembly that is easy to replace and has low production and use costs.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned defect that current carbide well head valve stem assembly exists, provide one kind and both can be with low production and use cost, change convenient carbide well head valve stem assembly again.

The purpose of the utility model is realized through the following technical scheme: a hard alloy wellhead valve rod component comprises a valve rod and a valve core; the front end of the valve rod is a cavity body; the valve core comprises a valve head and a traction piece which penetrates through the valve head and then extends into a cavity body of the valve rod; a conical round table is arranged between the valve rod and the valve head.

As another preferred scheme, the traction piece comprises a conical traction head, a threaded rod arranged at the bottom end of the conical traction head, and a positioning rod arranged at the lower end of the threaded rod; the threaded rod is in threaded connection with the inner wall of the cavity of the valve rod; the positioning rod is provided with a lock pin, and the lock pin sequentially penetrates through the cavity wall of the cavity body of the valve rod and the positioning rod and then is connected with the valve rod.

In order to better fix the positioning rod and ensure the rotating effect of the valve rod, a countersunk hole and a threaded hole are arranged on the hollow cavity of the valve rod; the fixed head of the lock pin is positioned in the countersunk hole, and the headless end of the lock pin extends into the threaded hole and is in threaded connection with the threaded hole.

In order to enable the valve head to be accurately connected with the conical traction head, the bottom end of the conical traction head is also provided with a positioning ring, and the front end of the conical traction head is provided with a pressure reduction groove.

In order to prevent the valve head from displacing when the valve rod is rotated, the front end of the valve head is provided with an annular positioning groove matched with the positioning ring, and the bottom end of the valve head is provided with more than one positioning column; and the conical round platform is provided with a positioning hole matched with the positioning column.

The valve rod is provided with a plurality of annular pressure equalizing grooves, and the plurality of annular pressure equalizing grooves are uniformly distributed on the valve rod. The valve rod is also provided with a mounting arm.

Compared with the prior art, the utility model, have following advantage and beneficial effect:

(1) the utility model discloses be detachable construction with the valve rod assembly design, set up the front end of valve rod into the cavity body, pass through the mode of screw thread with the case and install at the cavity of valve rod internal to adopt the lockpin to fix, ensure the stable performance that valve rod assembly used, thereby effectual solved current carbide well head valve rod assembly need whole change, change inconvenient problem at case wearing and tearing or damage.

(2) The utility model discloses adopt valve head and traction element combination to form with the case, not only reduced the volume of valve head, reduced the manufacturing cost and the use cost of case.

(3) The utility model discloses even publication has a plurality of annular pressure-equalizing grooves on the valve rod, can effectual reduction valve rod when rotating with the area of contact of outside pipe box, the effectual frictional force that reduces the valve rod and receive has surely prolonged the life of valve rod, also can improve the lubricated effect of lubricated liquid to the valve rod.

Drawings

Fig. 1 is a structural diagram of the present invention.

Fig. 2 is a schematic structural view of the traction member of the present invention.

Fig. 3 is a schematic diagram of an upper end structure of the valve element of the present invention.

Fig. 4 is a schematic structural view of the lower end of the valve element of the present invention.

The reference numbers in the drawings are:

the device comprises a valve rod, a valve head, a 3-annular positioning groove, a 4-conical traction head, a 5-decompression groove, a 6-positioning ring, a 7-positioning column, a 8-threaded rod, a 9-threaded hole, a 10-annular pressure equalizing groove, a 11-positioning rod, a 12-countersunk hole, a 13-locking pin, a 14-mounting rod and a 15-conical circular truncated cone.

Detailed Description

The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.

Examples

As shown in figures 1-4, the utility model discloses a carbide well head valve stem assembly, including valve rod 1 and case. In order to facilitate the installation and the disassembly of the valve core, the front end of the valve rod 1 is a hollow cavity. The valve core is arranged in a cavity at the front end of the valve rod 1 and is connected with the cavity through threads. The valve rod 1 is provided with a plurality of annular pressure-equalizing grooves 10 capable of improving the lubricating performance of the valve rod 1, and the plurality of annular pressure-equalizing grooves 10 are uniformly distributed on the valve rod 1. The annular pressure equalizing groove 10 can effectively reduce the friction between the valve rod 1 and the external pipe sleeve when the valve rod rotates, and can improve the lubricating effect of the valve rod 1. A mounting arm 14 is also provided on the valve stem 1, the mounting arm 14 being used to mount a handle for turning the valve stem 1.

Further, as shown in fig. 1, the valve cartridge includes a valve head 2 and a pulling member. Specifically, valve head 2 is installed on valve rod 1, and this valve head 2 is the alloy valve head, and valve head 2 not only the volume is less than current valve head, and this valve head 2 is the empty body, consequently, the utility model discloses an alloy material that valve head 2 used is far less than current valve head to the demand of alloy material. In order to increase the stress area of the valve rod 1 and ensure that the stress of the valve head 2 is more uniform, a conical round table 15 is arranged between the valve rod 1 and the valve head 2. Meanwhile, in order to better fix the valve head 2 on the conical round platform 15, more than one positioning column 7 is arranged at the bottom end of the valve head 2. As shown in fig. 4, the number of positioning columns 7 is preferably set to four in this embodiment, so as to better ensure the stability of the valve head 2. The conical round platform 15 is provided with a positioning hole 16 matched with the positioning column 7.

Still further, the pulling piece extends into the cavity body of the valve rod 1 after penetrating through the valve head 2. The pulling element is shown in fig. 1 and 2 and comprises a conical pulling head 4, a threaded rod 8 and a positioning rod 11. Specifically, when the conical traction head 4 is mounted, the conical traction head is in butt joint with the upper end of the valve head 2, in order to ensure that the conical traction head 4 can be accurately in butt joint with the valve head 2, a positioning ring 6 is further arranged at the bottom end of the conical traction head 4, and as shown in fig. 3, an annular positioning groove 3 matched with the positioning ring 6 is arranged at the upper end of the valve head 2. Meanwhile, in order to reduce the pressure of the fluid in the valve on the top of the conical traction head 4, a pressure reducing groove 5 is arranged at the front end of the conical traction head 4. The threaded rod 8 is fixed at the bottom end of the conical traction head 4 in a welding or threaded connection mode, and the threaded rod 8 extends into a cavity body of the valve rod 1 and is in threaded connection with the valve rod 1.

Furthermore, the positioning rod 11 is arranged at the lower end of the threaded rod 8, and the positioning rod 11 and the threaded rod 8 are fixed into a whole. The locating rod 11 is provided with a lock pin 13, and the lock pin 13 sequentially penetrates through the cavity wall of the cavity body of the valve rod 1 and the inner wall of the cavity body of the valve rod 1 after penetrating through the locating rod 11. In order to ensure that the valve rod 1 can normally rotate in the outer part pipe sleeve and ensure that the lock pin 13 is tightly connected with the valve rod 1, a countersunk hole 12 and a threaded hole 9 are arranged in a hollow cavity of the valve rod 1. The fixed head of the lock pin 13 is positioned in the countersunk hole 12, and the headless end of the lock pin 13 extends into the threaded hole 9 and is in threaded connection with the threaded hole 9.

During the specific use, install valve head 2 on toper round platform 15, pass valve head 2 with the threaded rod 8 and the locating lever 11 of pulling the piece again, rotate toper traction head 4, make threaded rod 8 and locating lever 11 stretch into the cavity of valve rod 1 internal to toper traction head 4 and valve head 2 and toper round platform 15 and valve head 2 in close contact with, make the via hole on the locating lever 11 and the countersunk hole 12 and the screw hole 9 of valve rod 1 be in on the same hole heart line simultaneously. At this time, the lock pin 13 is inserted into the counter bore 12 and the through hole of the positioning rod 11, the lock pin 13 is screwed to enter the threaded hole 9 until the fixing head of the lock pin 13 is embedded into the counter bore 12, and the assembly of the valve rod assembly is completed. Through the mode also alright quick dismantle the valve body subassembly, change valve head 2 promptly.

This embodiment sets up the front end of valve rod 2 into the cavity body with valve rod assembly design for detachable construction, passes through the mode of screw thread with the case and installs in the cavity of valve rod 1 to adopt lockpin 13 to fix, ensure the stable performance that valve rod assembly used, thereby effectual solved current carbide well head valve rod assembly need whole change, the inconvenient problem of change at case wearing and tearing or damage. Meanwhile, the valve core is formed by combining the valve head 2 and the traction piece, so that the volume of the valve head 2 is reduced, and the production cost and the use cost of the valve core are reduced. Even publication has a plurality of annular pressure-equalizing grooves 5 on valve rod 1, can effectual reduction valve rod 1 when rotating with the area of contact of outside pipe box, the effectual frictional force that has reduced valve rod 1 and received has surely prolonged valve rod 1's life, also can improve the lubricated effect of lubricated liquid to valve rod 1.

As described above, the present invention can be implemented well.

Claims

1. A hard alloy wellhead valve rod component comprises a valve rod (1) and a valve core; the valve is characterized in that the front end of the valve rod (1) is a hollow cavity; the valve core comprises a valve head (2) and a traction piece which penetrates through the valve head (2) and then extends into a cavity body of the valve rod (1); a conical round table (15) is arranged between the valve rod (1) and the valve head (2).

2. The cemented carbide wellhead stem assembly according to claim 1, wherein: the traction piece comprises a conical traction head (4), a threaded rod (8) arranged at the bottom end of the conical traction head (4), and a positioning rod (11) arranged at the lower end of the threaded rod (8); the threaded rod (8) is in threaded connection with the inner wall of the cavity of the valve rod (1); the positioning rod (11) is provided with a lock pin (13), and the lock pin (13) sequentially penetrates through the cavity wall of the cavity body of the valve rod (1) and the positioning rod (11) and then is connected with the valve rod (1).

3. The cemented carbide wellhead stem assembly according to claim 2, wherein: a cavity body of the valve rod (1) is provided with a counter bore (12) and a threaded hole (9); the fixing head of the lock pin (13) is positioned in the countersunk hole (12), and the headless end of the lock pin (13) extends into the threaded hole (9) and is in threaded connection with the threaded hole (9).

4. The cemented carbide wellhead stem assembly according to claim 2 or 3, characterized in that: the bottom end of the conical traction head (4) is also provided with a positioning ring (6), and the front end of the conical traction head (4) is provided with a pressure reduction groove (5).

5. The cemented carbide wellhead stem assembly according to claim 4, wherein: the front end of the valve head (2) is provided with an annular positioning groove (3) matched with the positioning ring (6), and the bottom end of the valve head (2) is provided with more than one positioning column (7); and the conical round platform (15) is provided with a positioning hole (16) matched with the positioning column (7).

6. The cemented carbide wellhead stem assembly according to claim 5, wherein: the valve rod (1) is provided with a plurality of annular pressure equalizing grooves (10), and the annular pressure equalizing grooves (10) are uniformly distributed on the valve rod (1).

7. The cemented carbide wellhead stem assembly according to claim 6, wherein: the valve rod (1) is also provided with a mounting arm (14).