CN212407577U - Automatic formula high pressure steam flow adjusting device - Google Patents
Automatic formula high pressure steam flow adjusting device Download PDFInfo
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- CN212407577U CN212407577U CN202020398452.0U CN202020398452U CN212407577U CN 212407577 U CN212407577 U CN 212407577U CN 202020398452 U CN202020398452 U CN 202020398452U CN 212407577 U CN212407577 U CN 212407577U
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Abstract
The utility model discloses an automatic high-pressure steam flow adjusting device, which comprises a valve body, a valve rod and an industrial personal computer, wherein the front end of the valve rod passes through the valve body to enter the valve body and is provided with a valve core, the valve core is an elliptic conical valve core, the rear side of the elliptic conical valve core is an elliptic part, and the front side of the elliptic conical valve core is a conical part; the valve port is a convergent-divergent valve port, the middle position of the valve port is a throat part, and the maximum diameter of the elliptic conical valve core is equal to the diameter of the throat part; the front of the throat part is a tapered section, and the rear of the throat part is a diverging section; the rear end of the valve rod is connected with a motor through a transmission roller, the motor is electrically connected with a motor driver electrically connected with a motion control card, an axial guide screw and a linear displacement sensor electrically connected with the motion control card are arranged on a shaft section at the rear end of the valve rod, and the motion control card is connected to an industrial personal computer; the motor drives the valve core to axially displace, thereby realizing the automatic adjustment of the high-pressure steam flow in the system. The utility model discloses simple structure, the precision is high, and the leakproofness is good between valve body and valve rod, has avoided the case to arouse that cavitation is serious because of the cavitation, problem such as with high costs.
Description
Technical Field
The utility model belongs to the technical field of flow control, especially, relate to a high pressure steam flow control device.
Background
The steam flow regulating device mainly controls the effective flow cross section area at the valve port by regulating the position of the valve core, thereby further controlling the steam flow at the outlet. However, the valve body and the adjusting rod of the conventional flow adjusting device are connected by single-end threads or double-end threads, the threaded connection has high self-locking capacity, and the self-locking force of the threaded connection can be overcome by consuming large force during operation to rotate the adjusting rod, so that the valve body and the adjusting rod are required to be well lubricated, lubricating oil is frequently required to be added, and extra cost and workload are increased. The threads are used in the steam pipeline, so that the steam pipeline is easy to rust; radial sealing is adopted between the adjusting rod and the valve body, so that the sealing effect is poor under the action of high pressure difference, and leakage is easy to generate; in addition, the valve core of the existing flow regulating valve is seriously eroded by steam, and particularly under the action of high pressure difference, the valve core is seriously abraded due to cavitation caused by the steam erosion.
To sum up, the current steam flow adjusting device ubiquitous structure is complicated, and flow control is loaded down with trivial details, and screw thread self-locking ability is big, and manual regulation is difficult, adopts radial seal between regulation pole and the valve body, and sealed effect is difficult to guarantee, produces easily and reveals, and the regulation precision is poor, is difficult to adjust steam flow effectively in the full stroke scope, and has vibration and erosion, short-lived scheduling problem.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned prior art, the utility model provides an automatic formula high pressure steam flow regulator's overall structure design and flow control mode thereof, the case adopts the effective flow area of the slider regulation steam of oval toper structure, puts forward the design of scale formula valve port, the design of oval toper case and the sealed design of axial lip emphatically.
In order to solve the problems of complicated structure, difficult manual adjustment due to large self-locking capacity of threads, poor adjustment precision, poor sealing property between a valve body and a valve rod, serious cavitation caused by cavitation of a valve core, high cost and the like of the conventional high-pressure steam flow adjusting device, the utility model provides an automatic high-pressure steam flow adjusting device, which comprises a valve body, a valve rod and an industrial personal computer, wherein the rear end of the valve rod is positioned outside the valve body, the front end of the valve rod penetrates through the valve body to enter the valve body, a sealing element is arranged between the valve rod and the valve body, the front end of the valve rod is provided with the valve core, the valve core is an elliptic conical valve core, the rear side of the elliptic conical valve core, which is connected with the valve rod, is an elliptic part, and the front; a valve port in the valve body, which is matched with the elliptic conical valve core, adopts a convergent-divergent valve port, and the middle position of the convergent-divergent valve port is a throat part; the front of the throat part is a tapered section, and the rear of the throat part is a diverging section; the maximum diameter of the elliptic conical valve core is equal to the diameter of the throat part; the rear end of the valve rod is connected with a motor through a transmission roller, the motor is electrically connected with a motor driver, and a linear displacement sensor and an axial guide screw are arranged on the shaft section at the rear end of the valve rod; the linear displacement sensor and the motor driver are electrically connected with a motion control card, and the motion control card is connected to the industrial personal computer; the motor drives the valve rod and the elliptic conical valve core to axially displace, so that the automatic adjustment of the high-pressure steam flow in the system is realized.
Further, automatic formula high pressure steam flow adjusting device, wherein, the internal surface of convergent section with the surface of ellipse circular cone shape case front end cone is identical.
The linear displacement sensor feeds back position data of the valve rod, the position data are collected by the motion control card, the industrial personal computer controls the motion control card to transmit pulse signals or analog quantity to the motor driver, and therefore the motor is controlled to rotate and is converted into linear motion of the valve rod through the transmission roller and the axial guide screw.
The motor adopts a servo motor, the motor drives the valve rod to axially displace, when the elliptic conical valve core completely enters the throat part, the throat part is sealed by the elliptic conical valve core, and at the moment, the flow rate is 0; when the elliptic conical valve core completely exits from the throat part, the throat part is completely unobstructed, and the flow passing through the throat part is maximum.
And a sealing element between the valve rod and the valve body is a lip-shaped sealing ring.
The elliptic cone-shaped valve core and the valve rod are manufactured into a whole and are made of 304 stainless steel.
And the automatic high-pressure steam flow regulating device is connected between an inlet and an outlet of a steam pipeline of the system through the first flange plate and the second flange plate.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the valve core of the utility model adopts the design of the elliptic cone-shaped structure, the high-pressure steam fluid can generate the choking effect at the convergent-divergent valve port of the elliptic cone-shaped valve core, the effect can effectively play the aim of stably adjusting the flow, the design of the elliptic structure at the left side of the elliptic cone-shaped valve core mainly reduces the resistance of high-speed airflow, and the design of the conical structure at the right side of the elliptic cone-shaped valve core mainly plays the role of adjusting the flow; the elliptic conical valve core is simple in structure, adopts 304 stainless steel for abrasion resistance, and can reduce the maintenance amount of the high-pressure steam flow regulating device.
2) In the utility model, the valve port of the elliptic cone valve core is designed to be of a convergent-divergent type, so that on one hand, the flow velocity of high-pressure steam gas can be increased to supersonic speed, the pressure of the gas at the outlet of the valve port is reduced, the pressure reduction effect is more obvious, and the pressure and flow regulation range is wider; on the other hand, because the length of the convergent-divergent valve port is limited and the speed of the fluid is high, the time for the air flow to pass through the valve port is very short, and therefore the heat exchange with the outside is very little, and the process can be regarded as an adiabatic process, namely, the valve port adopting the structure can minimize the energy loss of the high-pressure steam.
3) The utility model discloses in, adopt the sealed effect that prevents high-pressure steam and reveal that can effectively play of axial lip.
4) The utility model discloses well motor that sets up is favorable to automatic flow control that realizes, can overcome traditional single thread or double thread and make the time of operation harder this drawback because of the auto-lock power is great.
5) The utility model discloses industrial computer, linear displacement sensor, motion control board and the motor driver who sets up in, be favorable to the intelligent regulation and the control of adjusting device flow.
Drawings
FIG. 1 is a schematic structural view of an automatic high-pressure steam flow regulator of the present invention;
FIG. 2 is an enlarged view of the elliptical cone shaped poppet shown in FIG. 1;
FIG. 3 is an enlarged schematic view of the zoom-type valve port location shown in FIG. 1.
In the figure:
1-valve body 2-valve rod 3-elliptic cone valve core 4-linear displacement sensor
5-industrial personal computer 6-motor driver 7-motor 8-transmission roller
9-axial guide screw 10-lip-shaped sealing ring 11-first flange 12-zoom valve port
13-throat 14-second flange 15-motion control card
Detailed Description
The present invention will be further described with reference to the following drawings and specific examples, but the following examples are by no means limiting the present invention.
The utility model discloses technical scheme's design is: the throat part of the regulating valve adopts a slide block with an elliptic conical valve core structure to regulate the effective flow area of steam, and mainly relates to the integral structural design of the elliptic conical valve core, a convergent-divergent valve port and a regulating device.
As shown in fig. 1, the utility model provides an automatic high-pressure steam flow regulator connects the utility model on the pipeline of the system through a first flange 11 and a second flange 14, the automatic high-pressure steam flow regulator includes a valve body 1, a valve rod 2 and an industrial personal computer 5, the rear end of the valve rod 2 is located outside the valve body 1, the front end of the valve rod 2 passes through the valve body 1 and enters into the valve body 1, a sealing element is arranged between the valve rod 2 and the valve body 1, and the sealing element adopts a lip-shaped sealing ring 10; the front end of the valve rod 2 is provided with a valve core, the valve core is an elliptic conical valve core 3, the rear side of the elliptic conical valve core 3 connected with the valve rod 2 is an elliptic part, and the front side of the elliptic conical valve core 3 is a conical part; the maximum diameter of the elliptic conical valve core 3 is d 1; as shown in fig. 2, the axial length L1 of the conical portion on the front side of the elliptic conical valve core 3 and the axial length L2 of the elliptic portion on the rear side of the elliptic conical valve core 3 are determined according to requirements. The elliptic cone-shaped valve core 3 and the valve rod 2 are manufactured into a whole and are made of 304 stainless steel.
A convergent-divergent valve port 12 is adopted as a valve port in the valve body 1, which is matched with the elliptic conical valve core 3, a throat 13 is arranged in the middle of the convergent-divergent valve port 12, the diameter of the throat 13 is d0, and d0 is d1, as shown in fig. 2; the front surface of the throat part 13 is a tapered section, and the inner surface of the tapered section is matched with the shape of the outer surface of the cone at the front end of the elliptic cone-shaped valve core 3; the throat 13 is followed by a diverging section as shown in fig. 1 and 3.
The rear end of the valve rod 2 is connected with a motor 7 through a transmission roller 8, the motor 7 is electrically connected with a motor driver 6, and the motor 7 is controlled by a servo motor according to an input signal. And a linear displacement sensor 4 and an axial guide screw 9 are arranged on the rear end shaft section of the valve rod 2.
The linear displacement sensor 4 and the motor driver 6 are electrically connected with a motion control card 15, and the motion control card 15 is connected to the industrial personal computer 5; the industrial personal computer 5 calculates the effective flow area A of the valve port throat according to the formula (1) according to the required steam flow Q: a ═ Q/a (1)
In the formula (1), Q represents the steam flow rate in m3S; a represents the critical velocity of the steam at the throat, equal to the actual velocity of the local sound velocity, in m/s; calculating a by equation (2):
in formula (2), k represents the adiabatic index of the gas; p is a radical of0Represents the stagnation pressure, i.e. the pressure of the gas in adiabatic state, in Pa; v. of0Represents the specific volume in the stagnation state and has a unit of m3/kg；
According to the effective flow area A at the throat part of the valve port, the diameter d of the elliptic conical valve core is calculated by the formula (3)
In formula (3), d0 is the diameter of throat 13 in m; d represents the diameter of the elliptic cone valve core and has the unit of m.
According to the triangle similarity principle, the displacement L of the valve rod 2 for advancing or retreating is determined according to equation (4):
in the formula (4), d represents the diameter of the elliptic cone valve core and has the unit of m; d1 represents the maximum diameter of the elliptic cone valve core 3, the unit is m, and d1 is equal to d 0; l1 represents the axial length of the conical portion on the front side of the elliptic conical valve core 3 in m.
Under the control of an industrial personal computer 5, the motor 7 drives the valve rod 2 to axially displace, when the elliptic conical valve core 3 completely enters the throat 13, the throat 13 is sealed by the elliptic conical valve core 3, and at the moment, the flow is 0; when the elliptic conical valve core 3 completely exits the throat part 13, the throat part 13 is completely unobstructed, and the flow passing through is maximum at the moment.
The linear displacement sensor 4 feeds back the position data of the valve rod 2, the position data is collected by the motion control card 15, after the position data is resolved by a program in the industrial personal computer 5, the motion control card 15 transmits a pulse signal or an analog quantity to the motor driver 6, so that the motor 7 is controlled to rotate and is converted into the linear motion of the valve rod 2 through the transmission roller 8 and the axial guide screw 9, namely, the motor 7 drives the valve rod 2 and the elliptic conical valve core 3 to axially displace, and the automatic adjustment of the high-pressure steam flow in the system is realized. How to realize the program resolving and the programming thereof in the industrial personal computer belongs to the common general knowledge in the technical field, and the details are not repeated herein.
Embodiment one, the utility model discloses well design of oval toper case 3.
Based on the inlet of the throat 13 of the convergent-divergent valve port as a reference, the maximum diameter d1 of the elliptic conical valve core 3 is equal to the throat diameter d0 of the convergent-divergent valve port, namely: d1 ═ d0, as shown in fig. 2.
When the elliptic conical valve core 3 completely enters the throat part 13, the throat part 13 is completely blocked by the valve core, and the minimum flow rate which can pass through the valve core is 0; when the elliptical cone shaped valve core 3 completely exits the throat 13, the throat area is completely released, and the flow rate which can pass through is maximum. As shown in fig. 2, those skilled in the art can determine the axial length L1 of the conical portion on the front side of the elliptic conical valve core 3 and the axial length L2 of the elliptic portion on the rear side of the elliptic conical valve core 3 according to the actual size structure of the scalable valve port, and details thereof are not repeated herein. The part of the elliptic conical valve core 3 entering the throat 13 of the convergent-divergent valve port is designed in a mode that the axial section is triangular, namely a conical part at the front side, the other part, namely the rear side, is of an elliptic structure, the main part for adjusting is a triangular part, and the elliptic part is used for reducing the impact of high-speed airflow on the elliptic conical valve core 3. The user can input required steam flow Q in industrial computer 5 according to the demand, can calculate the effective flow area A of valve port 13 department according to formula A Q/a, wherein, a stands for the critical speed of steam in the throat, equals the actual speed of local sound velocity, after having confirmed effective flow area A, again according to the basis
The diameter of the elliptic conical valve core 3 at the throat 13 is determined, and finally the displacement of the valve rod 2 for advancing or retreating is determined according to the similar principle of a triangle.
Developing a control program in the industrial personal computer 5 according to the theory, controlling the motion control card 15 through the control program in the industrial personal computer 5, wherein the motion control card 15 is integrally connected with the motor driver 6 and the linear displacement sensor 4; the linear displacement sensor 4 can feed back accurate position data of the valve rod 2, the data is analog quantity and can be collected by the motion control card 15, after the data is resolved by an upper computer program, the motion control card 15 transmits a pulse signal or the analog quantity to the motor driver 6, so that accurate control of the motor 7 is realized, the rotation of the motor 7 is converted into linear motion of the valve rod 2 through the transmission roller 8 and the guide screw 9, namely, the motor 7 drives the valve rod 2 and the elliptic conical valve core 3 to move leftwards or rightwards, and automatic adjustment of high-pressure steam flow in the system is realized.
The utility model discloses the internal valve port of well valve body 1 adopts pantographic valve port 12. Because the flow rate is generally higher when the high-pressure steam passes through the valve port, the high-pressure steam starts to accelerate when entering the tapered section of the valve port, the gas flow rate at the throat 13 accelerates to the local sonic velocity under the state, and the time of the gas flow from entering the valve port to flowing out of the valve port is extremely short, so that the heat exchanged with the outside is extremely little and can be ignored. The steam flow rate continues to increase to supersonic from the throat 13 to the following diverging section, and the pressure of the fluid continues to decrease to a relatively small value. The structural design of the valve port 12 not only can achieve the purpose of regulating flow, but also can achieve the effect of throttling and reducing pressure, and the pressure reduction amplitude is larger than that of a tapered valve port structure, namely, the valve port of the structure has a wider range of throttling and reducing pressure.
Embodiment two, the utility model discloses high pressure steam flow regulator's overall structure design
As shown in fig. 1, the high-pressure steam flow regulating device includes a valve body 1, a valve rod 2, an elliptic conical valve core 3, a throat 13, a convergent-divergent valve port 12, a lip seal 10, a motor 7 (serving as a servo motor), a guide screw 9, a transmission roller 8, an industrial personal computer 5, a motion control card 15, a servo motor driver 6, a linear displacement sensor 4, and two flanges, i.e., a first flange 11 and a second flange 14.
The valve body 1 is connected with a steam inlet and a steam outlet through a first flange plate 11 and a second flange plate 14; the lip-shaped sealing ring 10 is arranged at the joint of the valve body 1 and the valve rod 2; the elliptic cone-shaped valve core 3 is arranged in the valve body and is connected with the valve rod 2 into a whole; the convergent-divergent valve port 12 is arranged inside the valve body; the throat 13 of the valve port is the connection position of the tapered and diverging parts of the scaled valve port 12, as shown in fig. 3; the valve rod 2 is arranged along the valve body axis; the axial guide screw 9 is fixed on the valve rod 2 and positioned on the outer side of the valve body 1, plays a role in guiding and can convert the rotary motion of the servo motor into the linear motion of the valve rod 2; the transmission roller 8 is fixed on the valve rod 2 and positioned between the servo motor and the axial guide screw 9 to play a role in transmitting force and torque; the servo motor is fixed on the leftmost side of the valve rod 2 and is a power input component of the whole flow regulating valve; the linear displacement sensor 4 is positioned on the valve rod 2 and plays a role in feeding back the position of the valve core 3; the industrial personal computer 5, the motion control card 15 and the servo motor driver 6 belong to the control part of the high-pressure steam flow valve, are positioned on the outer side of the valve body 1 and are fixed on the upper left part of the valve body 1; the motor 7 is a servo motor, can be controlled mainly according to input signals, can quickly respond, has very accurate position control precision, and can improve the accuracy of flow regulation of the regulating valve; the elliptic cone-shaped valve core 3 is made of 304 stainless steel and is integrated with the valve rod 2.
Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit of the present invention.
Claims (7)
1. An automatic high-pressure steam flow adjusting device comprises a valve body (1), a valve rod (2) and an industrial personal computer (5), wherein the rear end of the valve rod (2) is positioned outside the valve body (1), the front end of the valve rod (2) penetrates through the valve body (1) to enter the valve body (1), a sealing element is arranged between the valve rod (2) and the valve body (1), the front end of the valve rod (2) is provided with a valve core, and the device is characterized in that,
the valve core is an elliptic conical valve core (3), the rear side of the elliptic conical valve core (3) connected with the valve rod (2) is an elliptic part, and the front side of the elliptic conical valve core (3) is a conical part;
a valve port matched with the elliptic conical valve core (3) in the valve body (1) adopts a retractable valve port (12), and the middle position of the retractable valve port (12) is a throat part (13); the front of the throat part (13) is a tapered section, and the rear of the throat part (13) is a tapered section;
the maximum diameter of the elliptic conical valve core (3) is equal to the diameter of the throat part (13);
the rear end of the valve rod (2) is connected with a motor (7) through a transmission roller (8), the motor (7) is electrically connected with a motor driver (6), and a linear displacement sensor (4) and an axial guide screw (9) are arranged on the rear end shaft section of the valve rod (2);
the linear displacement sensor (4) and the motor driver (6) are electrically connected with a motion control card (15), and the motion control card (15) is connected to the industrial personal computer (5);
the motor (7) drives the valve rod (2) and the elliptic conical valve core (3) to axially displace, so that the automatic adjustment of the high-pressure steam flow in the system is realized.
2. The automatic high pressure steam flow regulator according to claim 1, wherein the inner surface of the tapered section is matched with the outer surface of the cone at the front end of the elliptic cone valve core (3).
3. The automatic high pressure steam flow regulator according to claim 2, wherein the linear displacement sensor (4) feeds back the position data of the valve rod (2) and the position data is collected by the motion control card (15), and the industrial personal computer (5) controls the motion control card (15) to transmit a pulse signal or an analog quantity to the motor driver (6), so as to control the motor (7) to rotate and convert the pulse signal or the analog quantity into the linear motion of the valve rod (2) through the transmission roller (8) and the axial guide screw (9).
4. The automatic high-pressure steam flow regulating device according to claim 3, characterized in that the motor (7) is a servo motor, the motor (7) drives the valve rod (2) to axially displace, when the elliptic conical valve core (3) completely enters the throat part (13), the throat part (13) is closed by the elliptic conical valve core (3), and at the moment, the flow rate is 0; when the elliptic conical valve core (3) completely exits the throat part (13), the throat part (13) is completely unobstructed, and the flow passing through the valve core is maximum at the moment.
5. The automatic high pressure steam flow regulator according to claim 1, characterized in that the seal between the valve stem (2) and the valve body (1) is a lip seal (10).
6. The automatic high pressure steam flow regulator according to claim 1, wherein the elliptic cone valve core (3) is made in one piece with the valve stem (2) and is made of 304 stainless steel.
7. The automatic high pressure steam flow regulator according to claim 1, wherein the automatic high pressure steam flow regulator is connected between the inlet and outlet of the steam pipe of the system by a first flange (11) and a second flange (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020398452.0U CN212407577U (en) | 2020-03-25 | 2020-03-25 | Automatic formula high pressure steam flow adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020398452.0U CN212407577U (en) | 2020-03-25 | 2020-03-25 | Automatic formula high pressure steam flow adjusting device |
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| CN212407577U true CN212407577U (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020398452.0U Expired - Fee Related CN212407577U (en) | 2020-03-25 | 2020-03-25 | Automatic formula high pressure steam flow adjusting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111365464A (en) * | 2020-03-25 | 2020-07-03 | 天津大学 | Automatic formula high pressure steam flow adjusting device |
| CN115234901A (en) * | 2022-07-27 | 2022-10-25 | 苏州行知环保科技有限公司 | Intelligent secondary air supply system for circulating fluidized bed boiler |
-
2020
- 2020-03-25 CN CN202020398452.0U patent/CN212407577U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111365464A (en) * | 2020-03-25 | 2020-07-03 | 天津大学 | Automatic formula high pressure steam flow adjusting device |
| CN111365464B (en) * | 2020-03-25 | 2024-07-30 | 天津大学 | Automatic high-pressure steam flow regulating device |
| CN115234901A (en) * | 2022-07-27 | 2022-10-25 | 苏州行知环保科技有限公司 | Intelligent secondary air supply system for circulating fluidized bed boiler |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210126 |
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| CF01 | Termination of patent right due to non-payment of annual fee |