CN215334496U - Digital stroke indication throttling stop emptying valve - Google Patents
Digital stroke indication throttling stop emptying valve Download PDFInfo
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- CN215334496U CN215334496U CN202121746302.5U CN202121746302U CN215334496U CN 215334496 U CN215334496 U CN 215334496U CN 202121746302 U CN202121746302 U CN 202121746302U CN 215334496 U CN215334496 U CN 215334496U
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Abstract
The utility model discloses a digital stroke indication throttling cut-off emptying valve, and relates to the technical field of valves. The utility model comprises a valve rod, a valve cover and a bracket; the support is provided with a valve rod transmission mechanism which drives the valve rod to move axially; the top end of the valve rod is provided with a protective cylinder, the protective cylinder is arranged on a shell of the transmission mechanism, and a displacement sensor for detecting the position of the valve rod is arranged in the protective cylinder; the valve rod transmission mechanism comprises a shell, a threaded sleeve, a bevel gear I, a bevel gear II, a rotating shaft and a hand wheel, the hand wheel drives the rotating shaft to rotate, the rotating shaft drives the threaded sleeve to rotate through transmission of the bevel gear I and the bevel gear II, and the threaded sleeve drives the valve rod to axially move. The displacement sensor detects the axial movement displacement of the valve rod to obtain the opening degree of the valve core, and transmits the opening degree to the station monitoring end so as to realize the remote monitoring of the opening degree of the throttling cut-off emptying valve in the station, so that the opening degree value of the throttling cut-off emptying valve is displayed on a display of a main control room, and the requirement of automatic control of the station is met.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a digital stroke indication throttling cut-off emptying valve.
Background
The throttling cut-off emptying valve is widely applied to pipelines of petroleum, natural gas, coal gas, liquefied petroleum gas, oil refining, airports, chemical engineering, oil and gas storage and transportation and the like as a closed-loop device.
Normally closed state: the valve core hard sealing pair is pressed on the valve seat boss to form a hard seal, and the soft seal embedded on the valve core is pressed tightly with the valve seat end face to form a second seal.
A pressure relief state: when the bottom end of the valve core leaves the sealing surface of the valve seat, the bottom end surface of the valve core is close to the bottom edge of the groove of the valve core sleeve, and the valve core and the inner diameter of the valve core sleeve form a seal at the moment. But not directly emptying and relieving pressure, thereby achieving the effect of relieving.
A throttling state: the valve core bottom leaves the disk seat, further open, little throttle head department forms the one-level throttle, high-speed fluid directly flows to little case after the slow pressure throttle, because case cover window edge is final throttle face, when the throttle passageway is directly washed away to high-pressure medium, the case bottom is because the medium produces the vortex to the change, has slowed down the direct washing of medium ground valve core, thereby the direct washing of medium has also been avoided in the disk seat sealing, simultaneously because the case sealed face is conical, can sweep filth and impurity on the sealed face of disk seat, the sealed face of protection, thereby the life of extension valve.
A fully open state: when the valve core is in a full-open state, the whole valve is in a full-emptying state, the resistance of fluid in the valve is small, the emptying time is shortened, and the emptying effect of the valve is improved.
The existing throttling stop emptying valves all adopt manual hand wheel rotation to realize the opening and closing of a valve core, and when the hand wheel is rotated to control the opening and closing of the valve, an operator cannot know the current opening of the valve and can not visually judge the current opening of the valve from the valve, which is not beneficial to the automatic monitoring of a natural gas transmission and distribution station.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems in the prior art, the utility model provides a digital stroke indication throttling stop emptying valve, and aims to improve the structure of the existing throttling stop emptying valve, so that the opening degree of the improved throttling stop emptying valve can realize digital stroke indication, and intelligent remote monitoring of a transmission and distribution station is facilitated. The utility model improves a valve rod transmission mechanism of the throttling cut-off emptying valve, and is additionally provided with a displacement sensor for monitoring the displacement of a valve rod, the valve rod transmission mechanism drives the valve rod to move axially, the displacement sensor detects the axial displacement of the valve rod, the opening of a valve core is obtained through the displacement of the valve rod and is transmitted to a field station monitoring end, so that the field station can remotely monitor the opening of the throttling cut-off emptying valve, the opening value of the throttling cut-off emptying valve is displayed on a display of a main control room, and the requirement of automatic control of the field station is met.
In order to solve the problems in the prior art, the utility model is realized by the following technical scheme:
the digital stroke indication throttling stop emptying valve comprises a valve body, a valve core sleeve, a valve seat, a valve core, a valve rod and a valve cover, wherein the valve seat is assembled in the valve body and is fastened by the valve core sleeve; the valve cover is provided with a support, the support is provided with a valve rod transmission mechanism, the upper end of the valve rod penetrates through the support and the transmission mechanism, the upper end of the valve rod is connected with the transmission mechanism, and the transmission mechanism drives the valve rod to move axially; the top end of the valve rod is provided with a protective cylinder, the protective cylinder is arranged on a shell of the transmission mechanism, and a displacement sensor for detecting the position of the valve rod is arranged in the protective cylinder; the valve rod transmission mechanism comprises a shell, a threaded sleeve, a bevel gear I, a bevel gear II, a rotating shaft and a hand wheel, wherein the threaded sleeve is assembled in the shell through a bearing and is in threaded fit with the valve rod, the bevel gear I and the threaded sleeve are coaxially installed and drive the threaded sleeve to rotate, the bevel gear II is installed at one end of the rotating shaft, the hand wheel is installed at the other end of the rotating shaft, the bevel gear II is meshed with the bevel gear I, and the rotating shaft is installed on the shell through a bearing.
It works as follows: when the hand wheel is rotated, the hand wheel drives the rotating shaft to rotate, the rotating shaft drives the bevel gear II to rotate, the bevel gear II drives the bevel gear I to rotate, the bevel gear I drives the threaded sleeve to rotate, under the matching action of the threads of the threaded sleeve and the valve rod, the threaded sleeve drives the valve rod to axially move, after the valve rod is displaced, the valve rod is sensed by the displacement sensor, the displacement sensor detects the displacement information of the valve rod and transmits the displacement information of the valve rod to a main control room of a field station through a signal wire, and the main control room receives a signal and converts the signal into a specific opening numerical value to display; or the information is transmitted to a remote main control room for display in an unattended station by an IC card wireless mode.
Furthermore, the displacement sensor comprises an indicating rod and a position transmitter, the position transmitter is fixed in the protective cylinder, one end of the indicating rod is connected with the top end of the valve rod, and the other end of the indicating rod is connected with the position transmitter. The position transmitter detects the moving distance of the indicating rod. It works as follows: the position transmitter detects the moving distance of the indicating rod, the moving distance of the indicating rod is the opening distance of the valve core, and the moving distance is converted into an analog signal of 4-20mA through a signal wire and sent to a control room computer. The opening of the valve of 4mA received by the computer in the control room is 0% (closed), the opening of the valve of 20mA received by the computer in the maximum signal is 100% (fully opened), and the intermediate value of 4mA-20mA is converted into the opening percentage of the valve in equal proportion.
The position transmitter converts the detected moving distance of the indicating rod into an analog signal of 4-20mA, and sends the analog signal to a control room computer through a signal wire.
A trapezoidal groove is formed between one side of the lower end of the valve core sleeve and one side of the upper end of the valve seat, the length of the notch of the trapezoidal groove is smaller than that of the groove bottom, and an O-shaped sealing ring is arranged in the trapezoidal groove; and hard alloy is welded on the position of the notch of the valve core corresponding to the trapezoid groove in a surfacing mode. Form a soft seal between case and the disk seat, the carbide of build-up welding on the case can form the shearing to O shape sealing washer, but this application is owing to have the existence of the trapezoidal groove of width under the narrow for carbide has alleviateed the shearing force to O shape sealing washer on the case, can prolong the life of O shape sealing washer like this. Because the trapezoidal groove with the narrow upper part and the wide lower part limits the deformation of the O-shaped sealing ring, the shearing of the O-shaped sealing ring by the hard alloy is changed into extrusion.
Compared with the prior art, the beneficial technical effects brought by the utility model are as follows:
1. in the existing throttling stop emptying valve, a hand wheel is directly connected with a valve rod, a threaded sleeve is fixed on a support, and the valve rod and the threaded sleeve are relatively displaced by rotating the valve rod, so that the emptying valve is opened or closed. The opening degree of the valve core is determined by the number of turns of the rotating hand wheel. If a displacement sensor is directly installed on the existing throttling stop emptying valve to detect the displacement of the valve rod, on one hand, the displacement sensor cannot be fixedly installed; on the other hand, even if the displacement sensor is attached by attaching a bracket, the displacement sensor cannot ensure detection accuracy. According to the utility model, through the design of the bevel gear set and the rotary design of the threaded sleeve, the valve rod does not rotate and only moves axially, the protective cylinder is arranged on the shell of the transmission mechanism and covers the valve rod, and the displacement sensor is arranged in the protective cylinder, so that the displacement sensor is conveniently arranged on one hand, and the protective cylinder forms a closed space on the other hand, the interference of other factors on the displacement sensor can be effectively prevented, and the detection precision of the displacement sensor is improved.
2. The position transmitter detects the moving distance of the indicating rod, the moving distance of the indicating rod is the opening distance of the valve core, and the moving distance is converted into an analog signal of 4-20mA through a signal wire and sent to a control room computer. The opening of the valve of 4mA received by the computer in the control room is 0% (closed), the opening of the valve of 20mA received by the computer in the maximum signal is 100% (fully opened), and the intermediate value of 4mA-20mA is converted into the opening percentage of the valve in equal proportion. Simple structure, sensitive reaction and high detection precision.
3. Form a soft seal between case and the disk seat, the carbide of build-up welding on the case can form the shearing to O shape sealing washer, but this application is owing to have the existence of the trapezoidal groove of width under the narrow for carbide has alleviateed the shearing force to O shape sealing washer on the case, can prolong the life of O shape sealing washer like this. Because the trapezoidal groove with the narrow upper part and the wide lower part limits the deformation of the O-shaped sealing ring, the shearing of the O-shaped sealing ring by the hard alloy is changed into extrusion.
Drawings
FIG. 1 is a schematic overall sectional view of the throttle cut-off vent valve of the present invention;
FIG. 2 is a schematic cross-sectional view of the valve stem drive of the present invention;
FIG. 3 is a schematic structural diagram of a seal between a valve core and a valve seat of the throttling stop emptying valve;
reference numerals: 1. the device comprises a valve body, 2, a valve core, 3, a valve seat, 4, a valve core sleeve, 5, a valve rod, 6, a valve cover, 7, a support, 8, a packing box, 9, a packing gland, 10, a valve rod transmission mechanism, 11, a protective cylinder, 12, a displacement sensor, 13, a shell, 14, a screw sleeve, 15, a bevel gear I, 16, a bevel gear II, 17, a rotating shaft, 18, a hand wheel, 19, an indicating rod, 20, a position transmitter, 21, a processor module, 22, a trapezoidal groove, 23 and an O-shaped sealing ring.
Detailed Description
The technical scheme of the utility model is further elaborated in the following by combining the drawings in the specification. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As an implementation mode of the embodiment, referring to the attached drawing 1 of the specification, the valve comprises a valve body 1, a valve core sleeve 4, a valve seat 3, a valve core 2, a valve rod 5 and a valve cover 6, wherein the valve seat 3 is assembled in the valve body 1 and fastened by the valve core sleeve 4, the valve core sleeve 4 is fastened in the valve body 1 by the valve cover 6, the valve core 2 is arranged in the valve core sleeve 4, the lower end of the valve rod 5 is connected with the valve core 2, the upper end of the valve rod 5 extends out of the valve cover 6, and the valve rod 5 is sealed between the valve cover 6 through a stuffing box 8 and a stuffing gland 9; the valve cover 6 is provided with a support 7, the support 7 is provided with a valve rod transmission mechanism 10, the upper end of the valve rod 5 penetrates through the support 7 and the transmission mechanism, the upper end of the valve rod 5 is connected with the transmission mechanism, and the transmission mechanism drives the valve rod 5 to move axially; a protective cylinder 11 is arranged at the top end of the valve rod 5, the protective cylinder 11 is arranged on a shell 13 of the transmission mechanism, and a displacement sensor 12 for detecting the position of the valve rod 5 is arranged in the protective cylinder 11; as shown in fig. 2, the valve rod transmission mechanism 10 includes a housing 13, a threaded sleeve 14, a bevel gear i 15, a bevel gear ii 16, a rotating shaft 17, and a hand wheel 18, wherein the threaded sleeve 14 is assembled in the housing 13 through a bearing, the threaded sleeve 14 is in threaded fit with the valve rod 5, the bevel gear i 15 and the threaded sleeve 14 are coaxially installed and drive the threaded sleeve 14 to rotate, the bevel gear ii 16 is installed at one end of the rotating shaft 17, the hand wheel 18 is installed at the other end of the rotating shaft 17, the bevel gear ii 16 is engaged with the bevel gear i 15, and the rotating shaft 17 is installed on the housing 13 through a bearing.
It works as follows: when the hand wheel 18 is rotated, the hand wheel 18 drives the rotating shaft 17 to rotate, the rotating shaft 17 drives the bevel gear II 16 to rotate, the bevel gear II 16 drives the bevel gear I15 to rotate, the bevel gear I15 drives the screw sleeve 14 to rotate, under the matching action of the screw sleeve 14 and the valve rod 5, the screw sleeve 14 drives the valve rod 5 to axially move, after the valve rod 5 is displaced, the displacement sensor 12 senses the displacement information of the valve rod 5, the displacement information of the valve rod 5 is transmitted to a main control room of a field station through a signal wire, and the main control room receives a signal and converts the signal into a specific opening numerical value to display; or the information is transmitted to a remote main control room for display in an unattended station by an IC card wireless mode.
As another embodiment of the present embodiment, the displacement sensor 12 includes a push rod and a sensing element, and its operation principle is: when the valve is opened or closed, the valve rod 5 moves linearly up and down to push the ejector rod of the displacement sensor 12 to move up and down, and the sensing element in the displacement sensor 12 connected with the ejector rod receives the position change of the ejector rod to generate the change of a magnetic field, so that the change of the magnetic field generates a current signal. The current signal is transmitted to a processor module 21 (a current acquisition circuit), 4-20mA current is output after the processing of the module, and a computer in a main control room generates a displacement numerical value which can be directly read in a control system after receiving the current.
As another embodiment of this embodiment, the displacement sensor 12 includes an indicating rod 19 and a position transducer 20, the position transducer 20 is fixed in the casing 11, and one end of the indicating rod 19 is connected to the top end of the valve rod 5, and the other end is connected to the position transducer 20. The position transmitter 20 detects the moving distance of the indicating rod 19. It works as follows: the position transmitter 20 detects the moving distance of the indicating rod 19, the moving distance of the indicating rod 19 is the opening distance of the valve core 2, and the moving distance is converted into an analog signal of 4-20mA through a signal wire and sent to a control room computer. The opening of the valve of 4mA received by the computer in the control room is 0% (closed), the opening of the valve of 20mA received by the computer in the maximum signal is 100% (fully opened), and the intermediate value of 4mA-20mA is converted into the opening percentage of the valve in equal proportion.
As another embodiment of this embodiment, as shown in fig. 3, a trapezoidal groove 22 is formed between one side of the lower end of the valve core sleeve 4 and one side of the upper end of the valve seat 3, the length of the notch of the trapezoidal groove 22 is smaller than the length of the groove bottom, and an O-ring seal 23 is arranged in the trapezoidal groove 22; and hard alloy is welded on the position of the notch of the valve core 2 corresponding to the trapezoidal groove 22 in a surfacing mode. Form a soft seal between case 2 and the disk seat 3, the carbide of build-up welding on the case 2 can form the shearing to O shape sealing washer 23, but this application is because there is the trapezoidal groove 22 of width under the narrow for carbide has alleviateed the shearing force to O shape sealing washer 23 on the case 2, can prolong O shape sealing washer 23's life like this. Because the trapezoidal groove 22 with narrow top and wide bottom limits the deformation of the O-shaped sealing ring 23, the shearing of the O-shaped sealing ring 23 by the hard alloy becomes extrusion.
Claims (4)
1. The digital stroke indication throttling stop emptying valve comprises a valve body (1), a valve core sleeve (4), a valve seat (3), a valve core (2), a valve rod (5) and a valve cover (6), wherein the valve seat (3) is assembled in the valve body (1) and fastened by the valve core sleeve (4), the valve core sleeve (4) is fastened in the valve body (1) by the valve cover (6), the valve core (2) is arranged in the valve core sleeve (4), the lower end of the valve rod (5) is connected with the valve core (2), the upper end of the valve rod (5) extends out of the valve cover (6), and the valve rod (5) is sealed between the valve cover (6) through a stuffing box (8) and a stuffing gland (9); the method is characterized in that: a support (7) is assembled on the valve cover (6), a valve rod transmission mechanism (10) is assembled on the support (7), the upper end of the valve rod (5) penetrates through the support (7) and the transmission mechanism, the upper end of the valve rod (5) is connected with the transmission mechanism, and the transmission mechanism drives the valve rod (5) to move axially; a protective cylinder (11) is arranged at the top end of the valve rod (5), the protective cylinder (11) is arranged on a shell (13) of the transmission mechanism, and a displacement sensor (12) for detecting the position of the valve rod (5) is arranged in the protective cylinder (11); the valve rod transmission mechanism (10) comprises a shell (13), a threaded sleeve (14), a bevel gear I (15), a bevel gear II (16), a rotating shaft (17) and a hand wheel (18), wherein the threaded sleeve (14) is assembled in the shell (13) through a bearing, the threaded sleeve (14) is in threaded fit with the valve rod (5), the bevel gear I (15) and the threaded sleeve (14) are coaxially installed and drive the threaded sleeve (14) to rotate, the bevel gear II (16) is installed at one end of the rotating shaft (17), the hand wheel (18) is installed at the other end of the rotating shaft (17), the bevel gear II (16) is meshed with the bevel gear I (15), and the rotating shaft (17) is installed on the shell (13) through a bearing.
2. A digital travel indicating throttle stop bleed valve as defined in claim 1 wherein: displacement sensor (12) are including indicating rod (19) and position transmitter (20), and position transmitter (20) are fixed in protecting a section of thick bamboo (11), and indicating rod (19) one end links to each other with valve rod (5) top, and the other end links to each other with position transmitter (20).
3. A digital travel indicating throttle stop bleed valve as defined in claim 2, wherein: the position transmitter (20) converts the detected moving distance of the indicating rod (19) into an analog signal of 4-20mA, and sends the analog signal to a control room computer through a signal wire.
4. A digital travel indicating throttle stop emptying valve as defined in any one of claims 1 to 3, wherein: a trapezoidal groove (22) is formed between one side of the lower end of the valve core sleeve (4) and one side of the upper end of the valve seat (3), the length of the notch of the trapezoidal groove (22) is smaller than that of the groove bottom, and an O-shaped sealing ring (23) is arranged in the trapezoidal groove (22); and hard alloy is welded on the position, corresponding to the notch of the trapezoidal groove (22), of the valve core (2) in a surfacing mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121746302.5U CN215334496U (en) | 2021-07-29 | 2021-07-29 | Digital stroke indication throttling stop emptying valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121746302.5U CN215334496U (en) | 2021-07-29 | 2021-07-29 | Digital stroke indication throttling stop emptying valve |
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| Publication Number | Publication Date |
|---|---|
| CN215334496U true CN215334496U (en) | 2021-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121746302.5U Active CN215334496U (en) | 2021-07-29 | 2021-07-29 | Digital stroke indication throttling stop emptying valve |
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| CN (1) | CN215334496U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116105998A (en) * | 2023-03-15 | 2023-05-12 | 阀源智能科技(杭州)有限公司 | MEMS-based valve opening real-time detection method and device |
-
2021
- 2021-07-29 CN CN202121746302.5U patent/CN215334496U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116105998A (en) * | 2023-03-15 | 2023-05-12 | 阀源智能科技(杭州)有限公司 | MEMS-based valve opening real-time detection method and device |
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