CN211501781U - Self-operated regulating valve with high pressure difference and small flow control - Google Patents
Self-operated regulating valve with high pressure difference and small flow control Download PDFInfo
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- CN211501781U CN211501781U CN201921859834.2U CN201921859834U CN211501781U CN 211501781 U CN211501781 U CN 211501781U CN 201921859834 U CN201921859834 U CN 201921859834U CN 211501781 U CN211501781 U CN 211501781U
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Abstract
The utility model discloses a little flow control of high pressure difference formula of relying on oneself governing valve, including valve body, case, valve rod, valve gap, symmetry setting import runner and export runner on the valve body, the tip of case is provided with the stifle, be provided with the inner skleeve between case and the stifle, the valve gap embeds there is piston assembly, and the top of valve gap is provided with the regulation pole, adjusts the pole overcoat and connects and be provided with the overhead guard, and the overhead guard passes through lock nut and valve gap realization connection, and this formula of relying on oneself governing valve still includes multistage pressure reduction structure. The utility model adopts a multi-stage pressure reduction structure, bears the nominal pressure of more than 25MPa, increases the application range of the pressure difference and improves the stability of the valve; a piston type actuating mechanism is adopted, and the control pressure range is enlarged; and an internal feedback structure is adopted, so that the response time is shortened, and the adjusting action is more sensitive.
Description
Technical Field
The utility model belongs to the technical field of the valve, concretely relates to little flow control of high pressure difference formula of relying on oneself governing valve.
Background
The self-operated regulating valve mainly depends on the pressure of a medium flowing through the valve to drive the valve to automatically work as an energy source, does not need an external power source and an air source, is usually used in a non-electric, non-air and unattended place, is convenient to save energy sources, can set parameters required by working conditions at one time through the regulating screw rod, and saves a large amount of manpower. The existing self-operated pressure taking structure is poor in sealing performance, unstable in pressure reducing structure and large in leakage amount.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model aims to provide a low flow control of high pressure difference formula of relying on oneself governing valve.
The utility model discloses a following technical scheme realizes:
the high-pressure-difference small-flow-control self-operated regulating valve comprises a valve body, a valve core, a valve rod, a valve cover, an inlet runner and an outlet runner, wherein the inlet runner and the outlet runner are symmetrically arranged on the valve body, a blank cap is arranged at the end part of the valve core, an inner sleeve is arranged between the valve core and the blank cap, the high-pressure-difference small-flow-control self-operated regulating valve is characterized in that a piston assembly is arranged in the valve cover, a regulating rod is arranged at the top end of the valve cover, a top cover is sleeved outside the regulating rod and connected with the regulating rod, the.
The high-pressure-difference small-flow-control self-operated regulating valve is characterized in that the blank cap is connected with the valve body through a stud bolt and a nut, and a first O-shaped sealing ring and a bottom flange sealing gasket are further arranged between the blank cap and the valve body.
The high-pressure-difference small-flow-control self-operated regulating valve is characterized in that a valve core spring seat is arranged on the valve core, and a lower spring is fixed on the valve core spring seat.
The high-pressure-difference small-flow-control self-operated regulating valve is characterized in that the piston assembly comprises a piston and a spring seat arranged at the upper end of a valve cover, an adjusting spring is fixedly arranged on the spring seat, the lower end of the adjusting spring is connected with the piston, an upper spring is arranged at the lower end of the piston, and the piston is in sealing connection with a valve body through a Y-shaped sealing ring and a second O-shaped sealing ring; and a steel ball is also arranged between the lower end of the adjusting rod and the spring seat.
The high-pressure-difference small-flow-control self-operated regulating valve is characterized in that a middle flange sealing gasket is arranged between the valve body and the valve cover.
The high-pressure-difference small-flow-control self-operated regulating valve is characterized in that the multistage pressure reduction structure comprises a pressure reduction baffle arranged on an inlet runner, a first pressure reduction hole, a second pressure reduction hole, a third pressure reduction hole and a fourth pressure reduction hole, the first pressure reduction hole, the second pressure reduction hole, the third pressure reduction hole and the fourth pressure reduction hole are arranged on the pressure reduction baffle, the second pressure reduction hole is arranged at the upper end of a blank cap, the third pressure reduction hole is arranged at the lower end of an inner sleeve, and the fourth pressure reduction hole is longitudinally arranged on a.
The utility model adopts a multi-stage pressure reduction structure, bears the nominal pressure of more than 25MPa, increases the application range of the pressure difference and improves the stability of the valve; a piston type actuating mechanism is adopted, and the control pressure range is enlarged; and an internal feedback structure is adopted, so that the response time is shortened, and the adjusting action is more sensitive.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
in the figure, 1-valve body, 2-valve core, 3-valve rod, 4-valve cover, 5-inlet flow channel, 6-outlet flow channel, 7-blank cap, 8-inner sleeve, 9-adjusting rod, 10-fixed cap, 11-locking nut, 12-first O-shaped sealing ring, 13-bottom flange sealing gasket, 14-valve core spring seat, 15-lower spring, 16-piston, 17-spring seat, 18-adjusting spring, 19-upper spring, 20-Y-shaped sealing ring, 21-second sealing ring, 22-steel ball, 23-middle flange sealing gasket, 24-pressure reduction baffle, 25-first pressure reduction hole, 26-second pressure reduction hole and 27-third pressure reduction hole.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings, and specific embodiments are given.
The utility model relates to a little flow control of high pressure difference formula of relying on oneself governing valve, this formula of relying on oneself governing valve, need not external energy or air supply, the utilization is transferred medium self energy and is the power supply, introduce piston control case position, change the pressure differential and the flow at both ends, make behind the valve pressure stable, the medium flows through the valve body with the shown direction of arrow point, through inner skleeve and case, through the export outflow, medium pressure leads the pressure port input to act on the piston below after passing through the valve, and convert the positioning force here, according to the size of spring pretightning force, positioning force adjustment case position, thereby reach the purpose of control valve backpressure.
As shown in fig. 1, the self-operated regulating valve has the specific structure that the self-operated regulating valve comprises a valve body, a valve core, a valve rod, a valve cover, an inlet flow channel and an outlet flow channel which are symmetrically arranged on the valve body, a blank cap is arranged at the end part of the valve core, an inner sleeve is arranged between the valve core and the blank cap, a piston assembly is arranged in the valve cover, a regulating rod is arranged at the top end of the valve cover, a top cover is sleeved outside the regulating rod and connected with the valve cover through a locking nut, and the self-.
The blank cap and the valve body are connected through a stud bolt and a nut, and a first O-shaped sealing ring and a bottom flange sealing gasket are arranged between the blank cap and the valve body; a middle flange sealing gasket is also arranged between the valve body and the valve cover; a valve core spring seat is arranged on the valve core, and a lower spring is fixed on the valve core spring seat; the piston assembly comprises a piston and a spring seat arranged at the upper end of the valve cover, an adjusting spring is fixedly arranged on the spring seat, the lower end of the adjusting spring is connected with the piston, an upper spring is arranged at the lower end of the piston, and the piston and the valve body are in sealing connection through a Y-shaped sealing ring and a second O-shaped sealing ring; and a steel ball is also arranged between the lower end of the adjusting rod and the spring seat.
Further, multistage step-down structure is including setting up step-down baffle on the inlet flow way, setting up first step-down hole, second step-down hole, third step-down hole and the fourth step-down hole on step-down baffle, the second step-down hole sets up in the upper end of stifle, telescopic lower extreme including the third step-down hole sets up, and the fourth step-down hole vertically sets up on the valve rod throttle face.
The utility model discloses the theory of operation, medium pressure leads the pressure port input to act on below the piston through the valve after to convert locating force into here, according to the size of spring pretightning force, and the locating force adjusts the case position, adjusts the size of spring pretightning force through adjusting the pole, and when medium pressure increases, compression spring drives the case, and the valve closes according to pressure variation volume ratio; when the medium pressure is reduced, the valve core is driven by the counterforce of the spring, so that the valve is proportionally increased according to the pressure variation, and the aim of controlling the pressure behind the valve is fulfilled.
Claims (6)
1. The utility model provides a little flow control of high pressure difference formula of relying on oneself governing valve, includes valve body (1), case (2), valve rod (3), valve gap (4), symmetry sets up import runner (5) and export runner (6) on valve body (1), the tip of case (2) is provided with stifle (7), be provided with inner skleeve (8) between case (2) and stifle (7), its characterized in that valve gap (4) embeds there is piston assembly, the top of valve gap (4) is provided with adjusts pole (9), it is provided with overhead guard (10) to adjust pole (9) outer cup joint, overhead guard (10) are connected through lock nut (11) and valve gap (4) realization, and this formula of relying on oneself governing valve still includes multistage depressurization structure.
2. The self-operated regulating valve with high pressure difference and small flow control as claimed in claim 1, wherein the blank cap (7) is connected with the valve body (1) through a stud bolt and a nut, and a first O-shaped sealing ring (12) and a bottom flange sealing gasket (13) are further arranged between the blank cap (7) and the valve body (1).
3. The self-operated regulating valve with high pressure difference and small flow control as claimed in claim 1, wherein the valve core (2) is provided with a valve core spring seat (14), and the valve core spring seat (14) is fixed with a lower spring (15).
4. The high-pressure-difference small-flow-control self-operated regulating valve as claimed in claim 1, wherein the piston assembly comprises a piston (16) and a spring seat (17) arranged at the upper end of the valve cover (4), an adjusting spring (18) is fixedly arranged on the spring seat (17), the lower end of the adjusting spring (18) is connected with the piston (16), an upper spring (19) is arranged at the lower end of the piston (16), and the piston (16) is in sealing connection with the valve body (1) through a Y-shaped sealing ring (20) and a second O-shaped sealing ring (21); and a steel ball (22) is also arranged between the lower end of the adjusting rod (9) and the spring seat (17).
5. A high pressure difference small flow control self-operated regulating valve according to claim 1, characterized in that a middle flange gasket (23) is arranged between the valve body (1) and the valve cover (4).
6. The self-operated regulating valve with high pressure difference and small flow control as claimed in claim 1, wherein the multi-step pressure reducing structure comprises a pressure reducing baffle (24) arranged on the inlet flow passage (5), a first pressure reducing hole (25) arranged on the pressure reducing baffle (24), a second pressure reducing hole (26), a third pressure reducing hole (27) and a fourth pressure reducing hole, the second pressure reducing hole (26) is arranged at the upper end of the blank cap (7), the third pressure reducing hole (27) is arranged at the lower end of the inner sleeve (8), and the fourth pressure reducing hole is longitudinally arranged on the throttling surface of the valve rod (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921859834.2U CN211501781U (en) | 2019-10-31 | 2019-10-31 | Self-operated regulating valve with high pressure difference and small flow control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921859834.2U CN211501781U (en) | 2019-10-31 | 2019-10-31 | Self-operated regulating valve with high pressure difference and small flow control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211501781U true CN211501781U (en) | 2020-09-15 |
Family
ID=72408158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921859834.2U Active CN211501781U (en) | 2019-10-31 | 2019-10-31 | Self-operated regulating valve with high pressure difference and small flow control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211501781U (en) |
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2019
- 2019-10-31 CN CN201921859834.2U patent/CN211501781U/en active Active
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