CN217502653U

CN217502653U - Double-blocking double-row DBB valve

Info

Publication number: CN217502653U
Application number: CN202221461858.4U
Authority: CN
Inventors: 李永安; 杨伟良; 何武财
Original assignee: Zhejiang Zixin Automation Equipment Co ltd
Current assignee: Zhejiang Zixin Automation Equipment Co ltd
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-09-27
Anticipated expiration: 2032-06-10

Abstract

The application relates to a double-blocking double-row DBB valve, which comprises an integrated valve body, valve covers respectively arranged at two ends of the valve body, two ball valve seat bodies rotatably arranged in the valve body at intervals, and a valve rod assembly, wherein one end of the valve rod assembly is respectively arranged on the two ball valve seat bodies, and the other end of the valve rod assembly extends out of the valve body; a cavity is formed between the two ball valve seat bodies, a plugging port and a discharge port are respectively arranged on the valve body, and a pressure relief channel communicated with the plugging port and the discharge port is arranged between the plugging port and the discharge port; the plug is communicated with the cavity, a needle valve is arranged at the plug, an NPT threaded plug screw is arranged at the discharge port, and a sealing ring is sleeved on the circumferential surface of the NPT threaded plug screw. This application realizes zero leakage target through adopting the sealed combination of side dress integral type valve body, saves installation space, has the leakproofness excellent, has the effect of high temperature resistant, low temperature resistant, corrosion-resistant, stand wear and tear, prevent the effect of static simultaneously.

Description

Double-blocking double-row DBB valve

Technical Field

The application relates to the technical field of valves, in particular to a double-blocking double-row DBB valve.

Background

The DBB ball valve is mainly characterized in that one valve is provided with two spheres, so that simultaneous opening and closing can be realized, double-blockage double-discharge can also be realized by opening and closing one valve, the complex form of connecting a plurality of valves in series in the traditional pipeline is replaced, leakage points in a pipeline system are reduced, the functions of quick discharge and closing are realized, the installation space is saved to the maximum extent, the installation procedure is simplified, the pressure of the pipeline system is reduced, the cleaning and maintenance of instruments are facilitated, and the cost is reduced.

The traditional DBB valve consists of two isolation valves and a release valve, a plurality of bolts, gaskets and the like are needed for mounting the three valves together, and leakage points are increased virtually by assembling the plurality of parts; the bleed valve is connected as a separate valve to the intermediate three-way valve body and if the bleed valve is mounted horizontally, a bending moment is generated under the influence of high mass and structural length, causing stress failure at the connection end of the bleed valve to be leaktight.

SUMMERY OF THE UTILITY MODEL

The application provides a two double DBB valves of stifled adopts the sealed combination of side dress integral type valve body, realizes the zero leakage target, saves installation space, has the leakproofness excellent, has high temperature resistant, resistant low temperature, corrosion-resistant, stand wear and tear simultaneously, prevents the effect of static.

The application provides a two double DBB valves that block up adopts following technical scheme:

a double-blocking double-row DBB valve comprises an integrated valve body, valve covers respectively arranged at two ends of the valve body, two ball valve seat bodies rotatably arranged in the valve body at intervals, and a valve rod assembly, one end of the valve rod assembly is respectively arranged on the two ball valve seat bodies, and the other end of the valve rod assembly extends out of the valve body; a cavity is formed between the two ball valve seat bodies, a plugging port and a discharge port are respectively formed on the valve body, and a pressure relief channel communicated with the plugging port and the discharge port is formed between the plugging port and the discharge port; the choke plug is communicated with the cavity and provided with a needle valve at the choke plug, the discharge port is provided with an NPT threaded plug screw, and a sealing ring is sleeved on the circumferential surface of the NPT threaded plug screw.

Preferably, the sealing rings are arranged at intervals along the axial direction of the NPT threaded plug screw.

Preferably, an annular groove is formed in the circumferential surface of the NPT threaded plug screw, and the sealing ring is sleeved in the annular groove.

Preferably, the tail end of the needle valve is provided with a valve clack, and the plugging port is connected with the cavity through a connecting channel; when the needle valve is installed at the plug, the valve clack is abutted and sealed at the port of the connecting channel.

Preferably, an included angle is formed between the axis of the plug and the axis of the discharge port.

Preferably, the included angle is 140 °.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the valve clack at the tail end of the needle valve is aligned to a connecting channel on the valve body and is sealed by the sealing surface of the connecting channel, and the blocking port, the discharge port and the cavity are sealed and blocked, so that the function of closing a pressure relief channel is realized; an annular groove is formed in the circumferential surface of the NPT threaded plug, and a sealing ring is sleeved on the annular groove of the NPT threaded plug, namely the NPT threaded plug and a double-O-shaped ring are combined in a triple sealing mode, so that the zero leakage target is realized, the installation space is saved, and the sealing performance is more excellent;

2. an included angle is formed between the axis of the plug and the axis of the discharge port, so that the pressure value of the NPT threaded plug at the discharge port is further reduced;

3. the NPT threaded plug screw is dismounted through rotation, the needle valve is rotated anticlockwise, the valve clack at the tail end of the needle valve is separated from the connecting channel, the cavity is communicated with the discharge port through the connecting channel and the pressure relief channel, and then the medium in the valve body flows out of the discharge port to be discharged;

4. aiming at the problem of complex structure of a plurality of valves connected in series in high-pressure conveying pipelines such as petroleum, natural gas and the like, the side-mounted integrated valve body is adopted, the weight ratio of the valve body to the DBB ball valve is about 40% lighter than that of the DBB ball valve with the same caliber, and the DBB ball valve has the advantages of high temperature resistance, low temperature resistance, corrosion resistance, wear resistance, blowout prevention of a valve rod and static prevention, is good in application performance due to adaptation with an external pipeline and is more widely applied.

Drawings

FIG. 1 is a cross-sectional view of a double block, double row DBB valve;

fig. 2 is a partial sectional view at the needle valve.

Description of reference numerals: 1. a valve body; 11. a cavity; 12. plugging the opening; 13. a discharge port; 14. a pressure relief channel; 15. a connecting channel; 2. a valve cover; 3. a ball valve seat body; 4. a valve stem assembly; 5. a needle valve; 51. a valve flap; 6. an NPT threaded plug screw; 61. an annular groove; 7. and (5) sealing rings.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses two stifled double DBB valves.

Referring to fig. 1, the double-block double-row DBB valve includes an integrated valve body 1, valve covers 2 respectively installed at two ends of the valve body 1, two ball valve seats 3 rotatably installed inside the valve body 1 at intervals, and a valve rod assembly 4 with one end installed on the two ball valve seats 3 respectively, wherein the other end of the valve rod assembly 4 extends to the outside of the valve body 1.

Referring to fig. 1 and 2, a cavity 11 is formed between the two ball valve seat bodies 3, a plug 12 and a discharge port 13 are respectively formed on the valve body 1, and a pressure relief channel 14 communicated with the plug 12 and the discharge port 13 is formed between the plug 12 and the discharge port 13; the axis of the plug 12 forms an angle, preferably 140 °, with the axis of the discharge opening 13.

The plugging port 12 is connected with the cavity 11 through a connecting channel 15, the needle valve 5 is installed at the plugging port 12 in a threaded connection mode, and the tail end of the needle valve 5 is provided with a valve clack 51; when the needle valve 5 is screwed on the plug 12, the valve clack 51 is sealed against the port of the connecting channel 15.

An NPT threaded plug screw 6 is installed at the discharge port 13, an annular groove 61 is formed in the circumferential surface of the NPT threaded plug screw 6, and a sealing ring 7 is sleeved on the annular groove 61 of the NPT threaded plug screw 6; a plurality of sealing rings 7 are arranged at intervals along the axis direction of the NPT threaded plug screw 6, and the number of the sealing rings is preferably two.

The implementation principle is as follows: the valve clack 51 at the tail end of the needle valve 5 is aligned to the connecting channel 15 on the valve body 1 and seals the sealing surface of the connecting channel, and the blocking port 12, the discharge port 13 and the cavity 11 are sealed and blocked, so that the function of closing the pressure relief channel 14 is realized; when the leakage flow needs to be opened, the NPT threaded plug screw 6 is rotationally dismounted, the needle valve 5 is rotated anticlockwise, the valve clack 51 at the tail end of the needle valve 5 is separated from the connecting channel 15, the cavity 11 is communicated with the discharge port 13 through the connecting channel 15 and the pressure relief channel 14, and then the medium in the valve body 1 flows out of the discharge port 13 to be discharged; and through having seted up ring channel 61 on NPT screw plug 6 periphery, and the cover is equipped with sealing washer 7 on NPT screw plug 6's ring channel 61, improve the leakproofness of discharge port 13 department, and be formed with the contained angle between the axis of stifled mouth 12 and the axis of discharge port 13, further reduce the pressure value to discharge port 13 department NPT screw plug 6, improve its leakproofness, through adopting the sealed combination of side dress integral type valve body 1, realize the zero leakage target, save installation space, it is excellent to have the leakproofness, the effect that has high temperature resistant, low temperature resistant, corrosion-resistant, stand wear and tear, prevent the effect of static effect simultaneously.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A double-blocking double-row DBB valve comprises an integrated valve body (1), valve covers (2) respectively installed at two ends of the valve body (1), two ball valve seat bodies (3) installed inside the valve body (1) in a rotating mode at intervals, and a valve rod assembly (4) with one end installed on the two ball valve seat bodies (3) respectively, wherein the other end of the valve rod assembly (4) extends out of the valve body (1); the method is characterized in that: a cavity (11) is formed between the two ball valve seat bodies (3), a blocking opening (12) and a discharge opening (13) are respectively formed on the valve body (1), and a pressure relief channel (14) communicated with the blocking opening (12) and the discharge opening (13) is formed between the blocking opening (12) and the discharge opening (13); stifled mouth (12) and cavity (11) intercommunication and install needle valve (5) in stifled mouth (12) department install NPT screw plug (6) in discharge port (13) department, and the cover is equipped with sealing washer (7) on the periphery of NPT screw plug (6).

2. A double block double row DBB valve according to claim 1 wherein: the sealing rings (7) are arranged in a plurality at intervals along the axis direction of the NPT threaded plug screw (6).

3. A double block double row DBB valve according to claim 1 or 2 wherein: an annular groove (61) is formed in the circumferential surface of the NPT threaded plug screw (6), and the sealing ring (7) is sleeved in the annular groove (61).

4. A double block double row DBB valve according to claim 1 wherein: the tail end of the needle valve (5) is provided with a valve clack (51), and the plugging port (12) is connected with the cavity (11) through a connecting channel (15); when needle valve (5) threaded mounting was in stifled mouth (12) department, valve clack (51) are contradicted and are sealed in the port department of interface channel (15).

5. A double block double row DBB valve according to claim 1 wherein: an included angle is formed between the axis of the blocking opening (12) and the axis of the discharge opening (13).

6. A double block and double row DBB valve as in claim 5 wherein: the included angle is 140 °.