CN217003098U

CN217003098U - Stop valve for steam pipeline

Info

Publication number: CN217003098U
Application number: CN202123296525.9U
Authority: CN
Inventors: ***
Original assignee: Suzhou Hongda Photoelectric Energy Saving Technology Co ltd
Current assignee: Suzhou Hongda Photoelectric Energy Saving Technology Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-07-19
Anticipated expiration: 2031-12-27

Abstract

The utility model discloses a stop valve for a steam pipeline, which comprises a valve body, a cover body, a rod body, a valve core and a corrugated pipe, wherein the cover body is provided with a cover body; the cover body is arranged on the valve body, and the cover body and the valve body are matched to form a valve cavity; the inner wall of the valve cavity is provided with an arc surface; a first flow passage and a second flow passage are arranged in the valve body; the first flow passage and the second flow passage are communicated with the valve cavity and form a communication opening on the arc-shaped surface; the valve core is movably arranged in the valve cavity up and down, and the bottom of the valve core is provided with a matching surface which can be in sealing fit with the arc-shaped surface; the rod body is in threaded connection with the cover body, and the first end of the rod body extends into the valve cavity and is in rotary connection with the valve core; the corrugated pipe is arranged in the valve cavity and sleeved on the rod body, the first end of the corrugated pipe is connected with the cover body in a sealing mode, and the second end of the corrugated pipe is connected with the valve core in a sealing mode. The stop valve can simultaneously realize the sealing of the two communication ports in the valve body, has good sealing effect, effectively improves the blocking effect of a steam medium, can effectively prevent the leakage of steam by combining the corrugated pipes, and has strong practicability.

Description

Stop valve for steam pipeline

Technical Field

The utility model relates to the technical field of valves, in particular to a stop valve for a steam pipeline.

Background

The stop valve is also called a stop valve, is a valve which is most widely used, and is durable due to small friction force between sealing surfaces in the opening and closing process, small opening height, easy manufacture and convenient maintenance, and can meet the requirements of conveying various media.

In the prior art, a stop valve comprises a valve body, a rod body, a valve cover, a valve core and the like. A medium inlet flow channel and a medium outlet flow channel are formed in the valve body, the two flow channels are respectively communicated with the valve cavity, the valve core of the stop valve only seals the communication port of one flow channel, if the communication port is not sealed well, steam still can flow in the flow channel, and the effect of blocking the medium flow is not achieved. In addition, in the process of pipeline transportation high pressure or low pressure steam, if the connecting position between the body of rod and the valve gap is sealed badly, steam easily leaks from this connecting position, and the steam of trace leakage is difficult to discover and handle at the very first time, has the potential safety hazard.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problems, the present invention aims to: the utility model provides a stop valve for steam conduit, this stop valve can realize the sealed of two intercommunication mouths in the valve body simultaneously, and sealed effect is good, effectively improves blocking effect of steam medium, and through the combined use of bellows, can effectively prevent the leakage of steam, and the practicality is strong.

The technical scheme of the utility model is realized as follows: a stop valve for a steam pipeline comprises a valve body, a cover body, a rod body, a valve core and a corrugated pipe; the cover body is arranged on the valve body, and the cover body and the valve body are matched with each other to form a valve cavity;

an arc-shaped surface is arranged on the inner wall of the valve cavity; a first flow passage and a second flow passage are arranged in the valve body; the first flow passage and the second flow passage are both communicated with the valve cavity, and both are provided with communicating ports on the arc-shaped surfaces;

the valve core is movably arranged in the valve cavity up and down, and the bottom of the valve core is provided with a matching surface which can be in sealing fit with the arc-shaped surface;

the rod body is in threaded connection with the cover body, and the first end of the rod body extends into the valve cavity and is in rotary connection with the valve core;

the corrugated pipe is arranged in the valve cavity and sleeved on the rod body, the first end of the corrugated pipe is connected with the cover body in a sealing mode, and the second end of the corrugated pipe is connected with the valve core in a sealing mode.

Further, a threaded hole is formed in the cover body; the rod body is in threaded connection with the threaded hole; a closed detection cavity is arranged on the cover body; the threaded hole is communicated with the detection cavity; the second end of the rod body extends into the detection cavity; the stop valve comprises a pressure detection device; the pressure detection device is inserted into the detection cavity and is used for detecting the pressure in the detection cavity; and the cover body is provided with an opening and closing assembly for opening and closing the detection cavity.

Further, the top of the detection cavity is open; the opening and closing assembly comprises a top cover and a plug; the top cover is detachably connected with the cover body and used for sealing an opening of the detection cavity; the top cover is provided with a window communicated with the detection cavity; the plug is detachably connected with the top cover and used for sealing the window.

Further, the stop valve comprises a handle for driving the rod body to rotate; the handle is detachably connected with the rod body.

Furthermore, a polygonal column body is arranged on the rod body; the handle is provided with a polygonal hole corresponding to the polygonal column.

Further, the stop valve comprises an alarm; the pressure detection device is connected with the alarm.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

1. according to the stop valve, the valve core and the arc-shaped surface are matched for use, the stop valve can simultaneously realize the sealing of the two communication ports in the valve body, the sealing effect is good, and the blocking effect of a steam medium is effectively improved. On the other hand, through the combined use of bellows, the screw hole on the lid is covered in the inside of bellows, and the bellows keeps apart screw hole and valve pocket to make the screw hole not communicate with valve pocket 11, and then can effectively prevent that steam from leaking from the screw hole, the practicality is strong.

2. The utility model uses the cooperation of the pressure detection device and the detection cavity, and the detection cavity is communicated with the threaded hole. When carrying pressure steam, when the bellows appear sealed bad circumstances such as cracked, pressure steam gets into via the gap between lid and the body of rod and detects the chamber, and pressure detection device can detect the pressure variation in detecting the chamber, and through this pressure variation, the operating personnel can judge the leakage condition of stop valve directly perceived, effectively improves steam transportation process's security.

Drawings

The technical scheme of the utility model is further explained by combining the accompanying drawings as follows:

FIG. 1 is a front view of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a front view schematic of the handle of the present invention;

wherein: 1. a valve body; 11. a first flow passage; 12. a second flow passage; 13. a valve cavity; 14. an arc-shaped surface; 2. a cover body; 21. a detection chamber; 3. a top cover; 31. a plug; 4. a rod body; 41. a polygonal cylinder; 411. a limiting member; 5. a bellows; 6. a valve core; 7. a pressure detection device; 8. a handle; 81. polygonal holes.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the utility model easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the utility model.

Fig. 1 to 3 show a stop valve for a steam pipeline according to the present invention, which is mainly used in a high pressure steam pipeline to block and communicate the steam pipeline. The stop valve comprises a valve body 1, a cover body 2, a rod body 4, a valve core 6, a corrugated pipe 5 and the like. The cover body 2 is hermetically mounted on the valve body 1 in a bolt connection mode, and the cover body and the valve body are matched to form a valve cavity 13. An arc-shaped surface 14 is processed on the inner wall of the valve cavity 13. A first flow passage 11 and a second flow passage 12 are formed in the valve body 1. The first flow passage 11 and the second flow passage 12 are both communicated with a valve chamber 13, and both are formed with communication ports on an arc-shaped face 14. With the above-described structure, the pressure steam enters the first flow passage 11, enters the valve chamber 13 through the communication port, and enters the second flow passage 12 through the communication port. The valve core 6 is movably arranged in the valve cavity 13 up and down, and the bottom of the valve core is provided with a matching surface which can be in sealing fit with the arc surface 14. Through the structural design, when the valve core 6 is sealed with the arc-shaped surface 14, the communication ports of the two flow channels can be synchronously sealed.

Wherein, the inner wall of the valve cavity 13 is provided with a guide groove, and two ends of the valve core 6 are arranged in the guide groove in a sliding fit manner, so that the valve core 6 can move up and down smoothly and stably.

The lid body 2 is provided with a screw hole. The rod body 4 is in threaded connection with the cover body 2 through the threaded hole. The lower end of the rod 4 extends into the valve chamber 13 and is rotatably connected with the valve core 6. As shown in fig. 2, a stopper 411 is formed at the lower end of the cover 4, and a stopper groove is formed in the valve body 6; the limiting member 4111 is installed in the limiting groove. The limiting part 411 can be limited to move up and down through the limiting of the limiting groove, but the limiting part 411 can still rotate.

The corrugated pipe 5 is a metal pipe, the corrugated pipe 5 is installed in the valve cavity 13 and sleeved on the rod body 4, a first end of the corrugated pipe 5 is connected with the cover body 2 in a sealing mode, and a second end of the corrugated pipe 5 is connected with the valve core 6 in a sealing mode. The threaded hole is covered inside the bellows 5, and the bellows 5 isolates the threaded hole from the valve chamber 13 so that the threaded hole is not communicated with the valve chamber 1311, thereby effectively preventing steam from leaking from the threaded hole.

The cover 2 is formed with a closed detection chamber 21. The detection chamber 21 is located outside the valve body 1. The threaded hole communicates with the detection chamber 21, thereby enabling the detection chamber 21 to communicate with the valve chamber 13. The second end of the rod body 4 extends into the detection chamber 21. The shut-off valve of the present embodiment comprises a pressure detection means 7. The pressure detection device 7 is inserted into the detection cavity 21 in a sealing fit manner with the cover body 2, and is used for detecting the pressure in the detection cavity 21. When the bellows 5 fails, the threaded hole communicates with the valve chamber 13, so that the detection chamber 21 communicates with the valve chamber 13, and pressure steam can enter the detection chamber 21 through the valve chamber 13. The pressure detection device 7 is a pressure sensor. The pressure sensor is connected with the audible and visual alarm in a wired or wireless way through the microprocessor. The pressure signal detected by the pressure sensor is transmitted to the microprocessor. The microprocessor receives and judges the pressure signal, and when the pressure signal is greater than a set threshold value, the microprocessor controls the action of the audible and visual alarm to output an alarm signal.

An opening/closing unit for opening/closing the detection chamber 21 is attached to the lid body 2. By opening the detection cavity 21, the operation rod 4 can be operated to rotate, and the valve core 6 is driven to lift. The detection chamber 21 is arranged with its top open. The opening and closing assembly comprises a top cover 3 and a plug 31, wherein the top cover 3 and the cover body 2 are installed on the cover body 2 in a bolt connection mode so as to seal an opening of the detection cavity 21. The top cover 3 is provided with a window communicated with the detection cavity 21, and the window is a threaded opening. A plug 31 is mounted on the top cover 3 in threaded connection with the cover 2 for sealing the window. The top cover 3 and the cover body 2 can be processed separately, and the requirements of the manufacturing process are effectively met.

The shut-off valve of this embodiment comprises a handle 8 for driving the lever body 4 in rotation. The handle 8 is detachably connected with the rod body 4. Specifically, a polygonal column 41 is formed at the upper end of the rod 4. A polygonal hole 81 is processed on the handle 8 corresponding to the polygonal column 41. The polygonal pillars 41 are preferably regular hexagonal pillars. By opening the plug 31, the handle 8 can be inserted into the detection chamber 21 and the rod 4 can be driven to rotate.

During specific operation, the rod body 4 is driven to rotate through the handle 8, and then the valve core 6 is driven to lift. Wherein, the fitting surface 61 of the valve core 6 is in sealing fit with the arc-shaped surface 14, and the communication ports of the two flow passages are closed, so that the stop valve is in a closed state to block the flow of steam. When the stop valve is in an open state, the bellows 5 isolates the threaded hole from the valve chamber 13 so that the threaded hole is not communicated with the valve chamber 1311, thereby effectively preventing steam from leaking from the threaded hole. If bellows 5 appear when sealed bad circumstances such as cracked, during pressure steam gets into detection chamber 21 via the gap between lid 2 and the body of rod 4, pressure detection device 7 can detect the pressure variation in detecting chamber 21, through the warning of alarm, the operating personnel can judge the leakage condition of stop valve directly perceived.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A stop valve for a steam pipeline comprises a valve body, a cover body, a rod body, a valve core and a corrugated pipe; the method is characterized in that: the cover body is arranged on the valve body, and the cover body and the valve body are matched with each other to form a valve cavity;

the inner wall of the valve cavity is provided with an arc-shaped surface; a first flow passage and a second flow passage are arranged in the valve body; the first flow passage and the second flow passage are both communicated with the valve cavity, and both the first flow passage and the second flow passage are provided with communicating ports on arc-shaped surfaces;

2. The shutoff valve for a steam line according to claim 1, wherein: the cover body is provided with a threaded hole; the rod body is in threaded connection with the threaded hole; a closed detection cavity is arranged on the cover body; the threaded hole is communicated with the detection cavity; the second end of the rod body extends into the detection cavity; the stop valve comprises a pressure detection device; the pressure detection device is inserted into the detection cavity and is used for detecting the pressure in the detection cavity; the cover body is provided with an opening and closing assembly for opening and closing the detection cavity.

3. The shutoff valve for a steam pipe according to claim 2, wherein: the top of the detection cavity is open; the opening and closing assembly comprises a top cover and a plug; the top cover is detachably connected with the cover body and is used for sealing an opening of the detection cavity; the top cover is provided with a window communicated with the detection cavity; the plug is detachably connected with the top cover and used for sealing the window.

4. The shutoff valve for a steam pipe according to claim 2, wherein: the stop valve comprises an alarm; the pressure detection device is connected with the alarm.

5. The shutoff valve for a steam line according to claim 1, wherein: the stop valve comprises a handle for driving the rod body to rotate; the handle is detachably connected with the rod body.

6. The shutoff valve for a steam line according to claim 5, wherein: a polygonal column body is arranged on the rod body; the handle is provided with a polygonal hole corresponding to the polygonal column.