CN-121576450-B - High-pressure straight-through plunger type throttle valve

CN121576450BCN 121576450 BCN121576450 BCN 121576450BCN-121576450-B

Abstract

The invention discloses a high-pressure straight-through plunger type throttle valve, which particularly relates to the technical field of throttle valves, and comprises a valve body, a plunger rod, a limit fixer and a through-flow seat, wherein a direct-current flow channel is arranged in the valve body, a plunger rod mounting hole is further formed in the valve body, the plunger rod is rotatably mounted in the plunger rod mounting hole, the limit fixer is detachably mounted at a position corresponding to the top end of the plunger rod on the valve body, a channel hole is formed in the bottom end of the plunger rod, the through-flow seat is detachably mounted in the channel hole, and a through-opening sealing ring is arranged at a region, corresponding to the inlet end and the outlet end of the through-flow seat, of the outer surface of the plunger rod. The valve body adopts a channel straight-through structure, reduces the energy consumption loss of equipment, does not need to change the direction of a medium flow channel, occupies small space of a well site, solves the layout problem, reduces the additional equipment caused by an angle type fixed throttle valve, reduces the cost and is more convenient to assemble and disassemble.

Inventors

HAN CHENGJUN
Min Ruisong
CHEN CHANGXU
ZHOU MING
ZHANG ZHENTAO

Assignees

江苏孚杰高端装备制造(集团)股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260129

Claims (5)

1. The high-pressure straight-through plunger type throttle valve comprises a valve body (1), a plunger rod (2), a limit fixer (3) and a through-flow seat (4), and is characterized in that a direct-flow channel is arranged inside the valve body (1), a plunger rod mounting hole (11) is further formed in the valve body (1), the plunger rod (2) is rotatably mounted in the plunger rod mounting hole (11), a limit convex ring (23) is arranged outside the top end of the plunger rod (2), the limit fixer (3) is detachably mounted at a position, corresponding to the top end of the plunger rod (2), on the valve body (1), a channel hole (24) is formed in the inner portion of the bottom end of the plunger rod (2), the through-flow seat (4) is detachably mounted in the channel hole (24), a through-hole sealing ring (5) is arranged at a position, corresponding to the inlet end and the outlet end of the through-flow seat (4), a buffer cavity (14) is formed in the valve body (1), a blocking plug (6) is mounted inside the buffer cavity (14), and the buffer cavity (6) is mounted in the valve body (1), and is communicated with the hollow cavity (61) through the hollow cavity (11) through the through-flow seat (61). The middle area of the plunger rod (2) is provided with a conical step (26), the position of the plunger rod mounting hole (11) corresponding to the conical step (26) is provided with a structure matched with the conical step (26), an upper sealing ring assembly (21) is arranged between the top end area of the plunger rod (2) and the plunger rod mounting hole (11), a lower sealing ring assembly (22) is arranged between the bottom end area of the plunger rod (2) and the plunger rod mounting hole (11), the outer surface of the plunger rod (2) is provided with a clamping mounting groove (25) corresponding to the area of the inlet end and the outlet end of the through-flow seat (4), and the through-opening sealing ring (5) is arranged in the clamping mounting groove (25); The pressure-reducing cavity (14) is connected with a pressure-increasing component, and the pressure-increasing component is used for increasing the fluid pressure in a gap between the plunger rod mounting hole (11) and the plunger rod (2) when the throttle valve is opened, so that the fluid flows into a direct-current flow channel of the valve body (1) from the gap between the plunger rod mounting hole (11) and the plunger rod (2); The supercharging assembly is of a linkage type supercharging structure, the linkage type supercharging structure comprises a first piston column (8), a first piston hole (15) is formed in the valve body (1), the first piston hole (15) is communicated with a communication hole (141), the first piston column (8) is slidably mounted in the top end area of the first piston hole (15), a first movable block (81) is fixedly connected to the top of the first piston column (8), the first movable block (81) is slidably matched with the bottom wall of a limiting convex ring (23), a long protruding block (231) is fixedly connected to the bottom of the limiting convex ring (23), the long protruding block (231) is slidably matched with the first movable block (81), the long protruding block (231) is provided with an inclined sliding slope, the long protruding block (231) is driven to be gradually matched with the first movable block (81) in the rotation process of the plunger rod (2), the first movable block (81) is further pushed down, and an elastic piece is arranged between the first piston column (8) and the first piston column (15) and is provided with an elastic piece for providing an upward elastic piece for the first piston column (8); the inner wall of the area, close to the inlet end, of the through-flow seat (4) is provided with a damping inner bushing (41), the damping inner bushing (41) is of a hollow elastic structure, and the communication hole (141) and the inner through-flow hole of the through-flow seat (4) are correspondingly arranged.
2. A high pressure straight-through plunger type throttle valve as claimed in claim 1, wherein a second piston hole (27) is arranged in the plunger rod (2), hydraulic liquid is filled in the second piston hole (27) and the clamping installation groove (25), the second piston hole (27) is communicated with the clamping installation groove (25), the through hole sealing ring (5) is slidably installed in the clamping installation groove (25), a second piston column (7) is slidably installed at the top end of the second piston hole (27), a second movable block (71) is fixedly connected to the second piston column (7), an elastic piece is arranged between the second piston column (7) and the plunger rod (2) and used for providing upward elastic force for the second movable block (71), a short lug (31) is arranged on the matching surface of the limiting fixer (3) and the top wall of the limiting convex ring (23), and when the short lug (31) is in contact with the second movable block (71), the second movable block (71) is pressed downwards.
3. The high-pressure straight-through plunger type throttle valve of claim 2, wherein a pressure relief assembly (13) is arranged on the side wall, close to the inlet end, of the valve body (1), a limit column (12) is arranged in the valve body (1) at a position corresponding to the bottom end of the plunger rod (2), and a jack in rotary insertion with the limit column (12) is arranged at the bottom end of the plunger rod (2).
4. A high-pressure straight-through plunger type throttle valve according to claim 3 is characterized in that a threaded structure matched with a limit fixer (3) is arranged on the valve body (1), the limit fixer (3) is installed on the valve body (1) through the threaded structure, the inside of the channel hole (24) is provided with the threaded structure, the through-flow seat (4) is installed with the channel hole (24) through the threaded structure, a convex-step structure is arranged at the inlet end of the through-flow seat (4), and a butt joint sealing ring (42) and a gasket (43) are arranged between the convex-step structure and the channel hole (24).
5. The high-pressure straight-through plunger type throttle valve as claimed in claim 4, wherein the through hole sealing rings (5) at the inlet end and the outlet end of the through hole seat (4) are respectively provided with two groups, the two groups of through hole sealing rings (5) are distributed in an inner ring and an outer ring, and the upper sealing ring assembly (21) and the lower sealing ring assembly (22) are respectively composed of sealing rings and check rings (28).

Description

High-pressure straight-through plunger type throttle valve Technical Field The invention relates to the technical field of throttle valves, in particular to a high-pressure straight-through plunger type throttle valve. Background In the petroleum and natural gas exploitation process, the purpose of controlling the flow and the pressure of fluid is realized by using a fixed throttle valve, so that the safety, the stability and the high efficiency of the production process are ensured. Most of currently used throttle valves are angle type fixed throttle valves, namely, the inlet center line and the outlet center line of the valve form an included angle of 90 degrees, the angle type fixed throttle valve changes the direction of a medium flow channel in the use process and occupies more space, and under the background of increasing well field equipment nowadays, the straight-through type fixed throttle valve receives more attention. When the existing angle type fixed throttle valve is used for replacing an internal component, the internal component can be taken out by using a tool after the throttle valve cover is detached, the throttle valve seat component is replaced in the valve body, the corresponding sealing structure is scratched easily during installation, leakage is caused, the replacement step is relatively complicated, the operation space is small, damage to parts in the valve is easily caused, the process is time-consuming and labor-consuming, and even the whole valve needs to be replaced under a high-pressure working condition. Disclosure of Invention The invention provides a high-pressure straight-through plunger type throttle valve, which aims to solve the problems that when an internal component of the existing angle type fixed throttle valve is replaced, the replacement step is relatively complex, the operation space is small, the damage to parts in the valve is easy to cause, and the process is time-consuming and labor-consuming. The high-pressure through plunger type throttle valve comprises a valve body, a plunger rod, a limit fixer and a through-flow seat, wherein a direct-flow channel is arranged in the valve body, a plunger rod mounting hole is further formed in the valve body, the plunger rod is rotatably mounted in the plunger rod mounting hole, a limit convex ring is arranged on the outer side of the top end of the plunger rod, the limit fixer is detachably mounted at a position corresponding to the top end of the plunger rod on the valve body, a channel hole is formed in the bottom end of the plunger rod, the through-flow seat is detachably mounted in the channel hole, a through-opening sealing ring is arranged at a position, corresponding to the inlet end and the outlet end of the through-flow seat, of the outer surface of the plunger rod, a pressure-relieving cavity is formed in the valve body, a sealing plug is mounted in the pressure-relieving cavity, a hollow elastic piece is fixedly mounted on one side of the sealing plug corresponding to the through-flow seat, and the pressure-relieving cavity is communicated with a gap between the plunger rod mounting hole and the plunger rod through the communication hole. Preferably, the middle area of the plunger rod is provided with a conical step, the position of the plunger rod mounting hole corresponding to the conical step is provided with a structure matched with the conical step, an upper sealing ring assembly is arranged between the top end area of the plunger rod and the plunger rod mounting hole, a lower sealing ring assembly is arranged between the bottom end area of the plunger rod and the plunger rod mounting hole, the outer surface of the plunger rod is provided with a clamping mounting groove corresponding to the inlet end and the outlet end of the through-flow seat, and the through-opening sealing ring is mounted in the clamping mounting groove. Preferably, the pressure reducing chamber is connected with a pressurizing assembly for increasing fluid pressure in the gap between the plunger rod mounting hole and the plunger rod when the throttle valve is opened, so that fluid flows from the gap between the plunger rod mounting hole and the plunger rod into the direct-current flow passage of the valve body. Preferably, the supercharging assembly is a linkage type supercharging structure, the linkage type supercharging structure comprises a first piston column, a first piston hole is formed in the valve body, the first piston hole is communicated with the communication hole, the first piston column is slidably mounted on the top end area of the first piston hole, a first movable block is fixedly connected to the top of the first piston column, the first movable block is slidably matched with the bottom wall of the limiting convex ring, a long protruding block is fixedly connected to the bottom of the limiting convex ring, the long protruding block is slidably matched with the first movable block, and an elastic piece is arranged b