CN217003114U

CN217003114U - Straight-through type anti-abrasion throttle valve

Info

Publication number: CN217003114U
Application number: CN202220074750.3U
Authority: CN
Inventors: 周鹏; 安毅洪; 左佩; 张志科; 张爽; 陈平; 傅汝冬; 周训云; 况俊舟; 夏洪
Original assignee: Chongqing Zhenghua Drilling And Production Equipment Co ltd
Current assignee: Chongqing Zhenghua Drilling And Production Equipment Co ltd
Priority date: 2022-01-12
Filing date: 2022-01-12
Publication date: 2022-07-19
Anticipated expiration: 2032-01-12

Abstract

The utility model discloses a straight-through type anti-abrasion throttle valve, which is characterized in that: including valve body, valve gap, valve rod, bearing frame, valve-stem nut, hand wheel, case, disk seat, the valve body left and right sides has air inlet and gas outlet respectively, valve pocket and vertical main entrance have from top to bottom in the middle of the valve body, the air inlet loops through vertical main entrance, valve pocket and the gas outlet intercommunication, be provided with the sliding sleeve of vertical activity in the vertical main entrance, the sliding sleeve has the center shaft hole that upwards link up, sliding sleeve excircle side has the correspondence the bar hole of air inlet, sliding sleeve upper portion has the journal section, and this journal section is located the disk seat is inboard, the journal section with be equipped with disk seat sliding sleeve sealing member between the disk seat inside wall, and work as when the valve door was opened on the case, the sliding sleeve shifts up. The beneficial effects of the utility model include: the valve seat sealing structure has the advantages of small occupied size, good sealing performance, convenience in disassembly and assembly and capability of protecting the valve seat sealing surface from being washed away.

Description

Straight-through type anti-abrasion throttle valve

Technical Field

The utility model relates to the field of throttle valves, in particular to a straight-through type anti-abrasion throttle valve.

Background

The throttling valve commonly used in the field of shale gas production is an angle throttling valve, the installation of the angle throttling valve and a pipeline need a 90-degree corner, the size is large, and the integral effect of the angle throttling valve and the installation of other valves of the pipeline is poor. The existing throttle valve mainly achieves the purpose of throttling or stopping by contacting a valve core with a valve seat, but due to the fact that a sealing surface in the outlet direction of the valve seat is washed by sand-containing gas for a long time, the part is seriously abraded, and then the part cannot be completely sealed and separated, so that the throttle valve can only achieve throttling, the throttling precision is difficult to control, and the stopping function cannot be achieved.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a straight-through type anti-abrasion throttle valve which is of a straight-through type structure, is convenient to install, small in occupied volume, good in valve seat abrasion resistance and good in sealing performance.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a straight-through type anti-abrasion throttle valve is characterized in that: the valve comprises a valve body, a valve cover, a valve rod, a bearing seat, a valve rod nut, a hand wheel, a valve core, a valve seat and a sliding sleeve, wherein the left side and the right side of the valve body are respectively provided with an air inlet and an air outlet, the middle of the valve body is provided with a valve cavity and a vertical main passage from top to bottom, the air inlet is communicated with the air outlet through the vertical main passage and the valve cavity, the valve seat is arranged at the bottom of the valve cavity and is coaxially arranged with the vertical main passage, the valve cover is arranged at the upper end of the valve body and is used for sealing the valve cavity, the lower part of the valve rod penetrates through the valve cover and extends into the valve cavity, the valve core is connected at the lower end of the valve rod, the lower part of the valve core is provided with a conical surface matched with the valve seat to realize sealing, the bearing seat is arranged on the valve cover, the valve rod nut is in running fit with the bearing seat through a bearing, and the valve rod nut is in threaded fit with the upper part of the valve rod, the hand wheel is sleeved on the valve rod nut; a vertically movable sliding sleeve is arranged in the vertical main channel, the sliding sleeve is provided with a central shaft hole which is communicated upwards, the outer side surface of the outer circle of the sliding sleeve is provided with a strip-shaped hole corresponding to the air inlet, the upper part of the sliding sleeve is provided with a journal section which is positioned at the inner side of the valve seat, a valve seat sliding sleeve sealing element is arranged between the journal section and the inner side wall of the valve seat, a movable gap is reserved between the lower end of the valve seat and a shaft shoulder of the sliding sleeve, and when the valve core moves upwards to open, the sliding sleeve moves upwards so that the upper end surface of the sliding sleeve exceeds the sealing surface of the valve seat; the valve comprises a valve cavity, a valve seat and a valve core, wherein the valve cavity is internally provided with a valve sleeve for pressing the valve seat, the upper end of the valve sleeve is limited on a valve cover, the valve core is movably arranged in the valve sleeve, a valve sleeve and valve core sealing piece is arranged between the valve core and the inner wall of the valve sleeve, a through hole communicated with the valve cavity is formed in the outer circle side wall of the lower part of the valve sleeve, a pressure-assisted sealing cavity is formed between the upper end of the valve core and the valve cover, and a valve core small hole communicated with the pressure-assisted sealing cavity is formed in the lower end of the valve core.

Furthermore, the wall thickness of the lower part of the sliding sleeve is larger than that of the upper journal section, and a movable gap is formed between the sliding sleeve and the vertical main channel.

Further, the vertical main channel penetrates through the valve body downwards, a plug for plugging the lower end of the vertical main channel is arranged at the bottom of the valve body, and a gap through which gas can pass is formed between the upper end of the plug and the lower end of the sliding sleeve.

Furthermore, a plug sealing element is arranged between the plug and the valve body.

Further, the bottom of the sliding sleeve is provided with a threaded hole.

Further, the lower part of the valve seat is provided with a positioning pin for limiting the circumferential rotation of the sliding sleeve.

Further, a valve seat and valve body sealing piece is arranged between the lower part of the valve seat and the valve body; a valve sleeve valve body sealing piece is arranged between the peripheral surface of the valve sleeve and the valve body, and a valve cover sealing piece is arranged between the upper end surface of the valve sleeve and the valve cover.

Further, a combined sealing ring is arranged between the upper portion of the valve cover and the valve rod, a sealing pressing cap for pressing the combined sealing ring is arranged at the upper end of the combined sealing ring, the sealing pressing cap is in threaded connection with the valve cover, and a sealing spacer ring is further arranged between the sealing pressing cap and the combined sealing ring.

Further, the bearing seat is sleeved on the outer side of the upper portion of the valve cover, the bearing seat is in threaded connection with the valve cover, and the bearing seat is further provided with radially arranged locking screws and the valve cover is in fastening connection.

Furthermore, a dustproof ring is arranged between the valve rod nut and the upper end of the bearing seat, and a protective cover for limiting the hand wheel is arranged at the upper end of the bonnet nut.

The beneficial effects of the utility model include: adopt direct structural design, it is small to occupy during the use, utilizes pipeline pressure to help the sealing, can reach best effectual, the leakproofness is good, the dismouting of being convenient for, during throttle and blowdown, utilizes the sliding sleeve to reciprocate, and the sealed face of protection disk seat is not washed away.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a partially enlarged view of fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments and the accompanying drawings.

A straight-through type anti-abrasion throttle valve shown in figure 1 comprises a valve body 3, a valve cover 8, a valve rod 14, a bearing seat 21, a valve rod nut 17, a hand wheel 16, a valve core 6 and a valve seat 4. The left side and the right side of the valve body 3 are respectively provided with an air inlet 30 and an air outlet 31; the middle of the valve body 3 is provided with a valve cavity and a vertical main channel from top to bottom. The air inlet 30 is communicated with the air outlet 31 sequentially through the vertical main passage and the valve cavity. The valve seat 4 is arranged at the bottom of the valve cavity and is coaxially arranged with the vertical main channel. The valve cover 8 covers the upper end of the valve body 3 and is tightly connected through a bolt 10 to close the valve cavity. The lower part of the valve rod 14 penetrates through the valve cover 8 and extends into the valve cavity, the valve core 6 is connected to the lower end of the valve rod 14, and the lower part of the valve core 6 is provided with a conical surface which is matched with the valve seat 8 to realize sealing. The valve rod 14 drives the valve core 6 to move up and down to realize the opening and closing of the valve.

The bearing seat 21 is sleeved on the outer side of the upper portion of the valve cover 8, the bearing seat 21 is in threaded connection with the valve cover 8, the bearing seat 21 is further provided with locking screws 22 which are radially arranged and in fastening connection with the valve cover 8, and the bearing seat 21 and the valve cover 8 are prevented from rotating relatively after being installed in place. The valve rod nut 17 is arranged inside the bearing seat 21, and the valve rod nut 17 is in rotating fit with the bearing seat 21 through two bearings 19 which are arranged at intervals up and down, namely, the valve rod nut 17 can realize circumferential rotation relative to the bearing seat 21. An oil cup 22 facing the bearing 19 is further provided on the bearing housing 21 for adding lubricating oil to the bearing 19. The stem nut 17 is engaged with the upper portion of the stem 14 by screw threads, i.e., the stem nut 17 rotates by itself to drive the stem 14 to move axially. The handwheel 16 is sleeved on the valve rod nut 17 and used for driving the valve rod nut 17 to rotate.

Further, in this embodiment, a vertically movable sliding sleeve 29 is disposed in the vertical main passage, and the sliding sleeve 29 has a central shaft hole penetrating upwards for communicating with the valve cavity; the outer side surface of the sliding sleeve 29 is provided with a strip-shaped hole corresponding to the air inlet 30 and used for communicating the central shaft hole with the air inlet 30, so that the sliding sleeve 29 is provided with an air flow channel. The upper part of the sliding sleeve 29 is provided with a journal section which is positioned at the inner side of the valve seat 4, and a valve seat sliding sleeve sealing member 27 is arranged between the journal section and the inner side wall of the valve seat 4 for sealing. A movable gap is reserved between the lower end of the valve seat 4 and the shaft shoulder of the sliding sleeve 29. The wall thickness of the lower part of the sliding sleeve 29 is larger than that of the upper journal section, and a movable gap is formed between the sliding sleeve 29 and the vertical main channel, so that when the gas inlet 30 is filled with gas and when the valve core 6 moves upwards to open the valve, the sliding sleeve 29 automatically moves upwards due to pressure difference generated by the area difference of the upper end surface and the lower end surface, so that the upper end surface of the sliding sleeve 29 exceeds the sealing surface of the valve seat 4; therefore, the sliding sleeve 29 protects the sealing surface of the sliding seat 4 from being washed away, and the purpose of long-term use can be achieved.

In this embodiment, a valve sleeve 5 for pressing the valve seat 4 is arranged in the valve cavity, the upper end of the valve sleeve 5 is limited on the valve cover 8, the valve core 6 is movably arranged in the valve sleeve 5, and a valve sleeve and valve core sealing member 25 is arranged between the valve core 6 and the inner wall of the valve sleeve 5. The outer circumferential side wall of the lower part of the valve housing 5 is provided with a through hole communicated with the valve cavity, so that gas passing through the valve seat 4 can enter the valve cavity. A pressure-assisted sealing cavity 33 is formed between the upper end of a valve core 6 and a valve cover 8 in the valve sleeve 5, a valve core small hole 32 communicated with the pressure-assisted sealing cavity 33 is formed in the lower end of the valve core 6, when the valve core 6 moves downwards, the sliding sleeve 29 is jacked open, the valve core 6 is completely contacted with a sealing surface of a valve seat 4, the valve is closed, and after the valve is closed, gas pressure of an upstream gas inlet 30 enters the pressure-assisted sealing cavity 33 through the valve core small hole 32, so that the pressure-assisted sealing effect is achieved, and a good sealing effect is achieved.

Furthermore, the vertical main channel penetrates through the valve body 3 downwards, the bottom of the valve body 3 is provided with a plug 1 for plugging the lower end of the vertical main channel, and a gap through which gas can pass is formed between the upper end of the plug 1 and the lower end of the sliding sleeve 29. So that the air pressure at the lower end of the sliding sleeve 29 and the air inlet 30 is balanced, and the air acts on the bottom surface of the sliding sleeve 29 to push the sliding sleeve 29 upwards through the area difference. And a plug sealing element 2 is arranged between the plug 1 and the valve body 3 to prevent air leakage. The bottom of the sliding sleeve 29 is provided with a threaded hole, so that the sliding sleeve 29 can be conveniently and smoothly taken out from the vertical main channel for replacement through a screw after the plug 1 is removed.

In order to limit the sliding sleeve 29 from rotating circumferentially in the vertical main channel, the lower part of the valve seat 4 is provided with a positioning pin 28.

To make the throttle valve of the present embodiment seal well. A valve seat and valve body sealing element 26 is arranged between the lower part of the valve seat 4 and the valve body 3; a valve sleeve and valve body sealing piece 24 is arranged between the peripheral surface of the valve sleeve 5 and the valve body 3, and a valve cover sealing piece 23 is arranged between the upper end surface of the valve sleeve 5 and the valve cover 8. A combined sealing ring 11 is arranged between the upper part of the valve cover 8 and the valve rod 14, a sealing pressure cap 13 for pressing the combined sealing ring 11 is arranged at the upper end of the combined sealing ring 11, the sealing pressure cap 13 is in threaded connection with the valve cover 8, and a sealing spacer ring 12 is further arranged between the sealing pressure cap 13 and the combined sealing ring 11. A dustproof ring 18 is arranged between the valve rod nut 17 and the upper end of the bearing seat 21, and a protective cover 15 of a limiting hand wheel 16 is arranged at the upper end of the valve cap nut 17.

In order to further increase the wear resistance, the valve seat 4, the valve core 6 and the sliding sleeve 29 in the embodiment are all made of martensitic stainless steel. The sealing surfaces of the valve seat 4 and the valve core 6 are subjected to surface hardening treatment.

The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.

Claims

1. A straight-through type anti-abrasion throttle valve is characterized in that: the valve comprises a valve body (3), a valve cover (8), a valve rod (14), a bearing seat (21), a valve rod nut (17), a hand wheel (16), a valve core (6) and a valve seat (4), wherein the left side and the right side of the valve body (3) are respectively provided with an air inlet (30) and an air outlet (31), the middle of the valve body (3) is provided with a valve cavity and a vertical main channel from top to bottom, the air inlet (30) is communicated with the air outlet (31) sequentially through the vertical main channel and the valve cavity, the valve seat (4) is provided with a valve cavity bottom and is coaxially arranged with the vertical main channel, the valve cover (8) covers the upper end of the valve body (3) and is used for sealing the valve cavity, the lower part of the valve rod (14) penetrates through the valve cover (8) and extends into the valve cavity, the valve core (6) is connected with the lower end of the valve rod (14), the lower part of the valve core (6) is provided with a conical surface which is matched with the valve seat (4) to realize sealing, the bearing seat (21) is arranged on the valve cover (8), the valve rod nut (17) is in running fit with the bearing seat (21) through a bearing (19), the valve rod nut (17) is in threaded fit with the upper part of the valve rod (14), and the hand wheel (16) is sleeved on the valve rod nut (17); a vertically movable sliding sleeve (29) is arranged in the vertical main channel, the sliding sleeve (29) is provided with a central shaft hole which is communicated upwards, the outer circle side surface of the sliding sleeve (29) is provided with a strip-shaped hole corresponding to the air inlet (30), the upper part of the sliding sleeve (29) is provided with a shaft neck section, the shaft neck section is positioned on the inner side of the valve seat (4), a valve seat sliding sleeve sealing element (27) is arranged between the shaft neck section and the inner side wall of the valve seat (4), a movable gap is reserved between the lower end of the valve seat (4) and a shaft shoulder of the sliding sleeve (29), and when the valve core (6) moves upwards to open the valve, the sliding sleeve (29) moves upwards, so that the upper end surface of the sliding sleeve (29) exceeds the sealing surface of the valve seat (4); the improved valve is characterized in that a valve sleeve (5) used for compressing the valve seat (4) is arranged in the valve cavity, the upper end of the valve sleeve (5) is limited on the valve cover (8), the valve core (6) is movably arranged in the valve sleeve (5), a valve sleeve and valve core sealing piece (25) is arranged between the valve core (6) and the inner wall of the valve sleeve (5), a through hole communicated with the valve cavity is formed in the outer circle side wall of the lower portion of the valve sleeve (5), a pressure-assisted sealing cavity (33) is formed between the upper end of the valve core (6) and the valve cover (8), and a valve core small hole (32) communicated with the pressure-assisted sealing cavity (33) is formed in the lower end of the valve core (6).

2. A straight through wear prevention throttle valve as claimed in claim 1 wherein: the wall thickness of the lower part of the sliding sleeve (29) is larger than that of the upper journal section, and a movable gap is formed between the sliding sleeve (29) and the vertical main channel.

3. A straight through wear prevention throttle valve as claimed in claim 1 wherein: the vertical main channel penetrates through the valve body (3) downwards, the bottom of the valve body (3) is provided with a plug (1) for plugging the lower end of the vertical main channel, and a gap through which gas can pass is formed between the upper end of the plug (1) and the lower end of the sliding sleeve (29).

4. A straight through wear prevention throttle valve as claimed in claim 3 wherein: and a plug sealing element (2) is arranged between the plug (1) and the valve body (3).

5. A straight through wear prevention throttle valve as claimed in claim 1 wherein: the bottom of the sliding sleeve (29) is provided with a threaded hole.

6. A straight through wear prevention throttle valve as claimed in claim 1 wherein: and a positioning pin (28) for limiting the circumferential rotation of the sliding sleeve (29) is arranged at the lower part of the valve seat (4).

7. A straight through wear resistant throttle valve according to claim 1 wherein: a valve seat and valve body sealing piece (26) is arranged between the lower part of the valve seat (4) and the valve body (3); a valve sleeve body sealing piece (24) is arranged between the peripheral surface of the valve sleeve (5) and the valve body (3), and a valve cover sealing piece (23) is arranged between the upper end surface of the valve sleeve (5) and the valve cover (8).

8. A straight through wear prevention throttle valve as claimed in claim 1 wherein: valve gap (8) upper portion with be provided with combination sealing washer (11) between valve rod (14), combination sealing washer (11) upper end is provided with and compresses tightly sealed cap (13) of pressing of combination sealing washer (11), sealed cap (13) of pressing with valve gap (8) threaded connection, sealed cap (13) of pressing with still be provided with sealed spacer ring (12) between combination sealing washer (11).

9. A straight through wear prevention throttle valve as claimed in claim 1 wherein: the bearing seat (21) is sleeved on the outer side of the upper portion of the valve cover (8), the bearing seat (21) is in threaded connection with the valve cover (8), and locking screws (22) which are radially arranged are further arranged on the bearing seat (21) and are fixedly connected with the valve cover (8).

10. A straight through wear prevention throttle valve as claimed in claim 1 wherein: a dustproof ring (18) is arranged between the valve rod nut (17) and the upper end of the bearing seat (21), and a protective cover (15) for limiting the hand wheel (16) is arranged at the upper end of the valve rod nut (17).