CN213871386U - High-pressure-difference small-flow regulating valve - Google Patents
High-pressure-difference small-flow regulating valve Download PDFInfo
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- CN213871386U CN213871386U CN202022952051.8U CN202022952051U CN213871386U CN 213871386 U CN213871386 U CN 213871386U CN 202022952051 U CN202022952051 U CN 202022952051U CN 213871386 U CN213871386 U CN 213871386U
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- seat
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Abstract
The utility model discloses a high pressure difference small flow regulating valve, which comprises a valve body, a valve seat, a valve core and a valve cover, wherein the valve seat is arranged inside the valve body, the lower end of the valve core is inserted into the valve seat, a two-way thread is processed at the lower end of the valve core, the valve cover is arranged on the top surface of the valve body, and the valve core passes through the center of the valve cover and is inserted into the valve seat; the two-way thread line is processed on the valve core, the intersecting part of the thread line is utilized to enable the medium to be opposite-flushed for pressure reduction, and the multiple sealing surfaces and the expansion cavities between the valve seat and the valve core are utilized to reduce the pressure for many times, so that the regulating valve can be used under the working condition of high pressure difference and small flow.
Description
Technical Field
The utility model belongs to the technical field of the governing valve, especially, relate to a little flow control valve of high pressure difference.
Background
In factory automation production equipment, a regulating valve plays an important role. The regulator valve acts as a variable resistance in the conduit, which changes the turbulence of the process fluid or provides a pressure differential in laminar flow conditions, the pressure differential being caused by changing the valve resistance or "friction". At present, a typical structure of a regulating valve is plunger type or sleeve type, but no matter which of the two structures can not meet the working condition of high pressure difference and small flow, so that the regulating valve with regulating performance under the working condition of high pressure difference and small flow is needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a poor little flow control valve of high pressure to solve the problem that present governing valve can't satisfy and use under the poor little flow operating mode of high pressure.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model discloses a little flow control valve of high pressure difference, including valve body (1), disk seat (2), case (3) and valve gap (4), install in the inside of valve body (1) disk seat (2), the inside of disk seat (2) is inserted to the lower extreme of case (3), and the lower extreme processing of case (3) has two-way thread line, and the top surface at valve body (1) is installed in valve gap (4), and valve gap (3) are passed the center of valve gap (4) and are inserted in disk seat (2).
In the above scheme, it is preferable that a packing pad (5) is installed between the upper part of the valve cover (4) and the valve core (3).
It is also preferred that the packing mat (5) is filled with a packing (6).
It is also preferable that the top end of the valve cover (4) is provided with a packing pressing sleeve (7), and the lower end of the packing pressing sleeve (7) extends into the valve cover (4) and is pressed on the packing (6).
It is also preferred that the packing press sleeve (7) is connected to the valve cover (4) by means of a screw.
It is also preferred that the packing sleeve (7) is of T-shaped construction.
It is also preferred that the valve slide (3) passes through the center of the packing gland (7).
It can also be preferred that at least two expansion cavities are arranged on the inner wall of the valve seat (2) at the contact surface of the valve seat (2) and the inner wall of the valve core (3).
It is also preferable that at least two sealing surfaces are arranged on the contact surface of the valve seat (2) and the inner wall of the valve core (3).
It is also preferable that a bushing (8) is installed between the bottom of the valve cover (4) and the valve core (3).
It is also preferred that the valve cover (4) is connected to the valve body (1) by means of bolts.
It is also preferred that the central top surface of the valve body (1) is provided with a recess.
It is also preferable that the center of the valve cover (4) is provided with a boss, which is inserted into the groove.
It is also preferable that the lower end of the valve core (3) is a ball head, and the ball head is inserted into a ball groove of the valve seat (2).
It is also preferable that the diameter of the lower end of the valve core (3) where the bidirectional thread is processed is larger than the diameter of the other positions.
The utility model has the advantages that:
the utility model discloses a high pressure difference small flow control valve, solved the problem that the governing valve can't satisfy the use under the high pressure difference small flow operating mode among the prior art; the two-way thread line is processed on the valve core, the intersecting part of the thread line is utilized to enable the medium to be opposite-flushed for pressure reduction, and the multiple sealing surfaces and the expansion cavities between the valve seat and the valve core are utilized to reduce the pressure for many times, so that the regulating valve can be used under the working condition of high pressure difference and small flow.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
fig. 1 is the structure schematic diagram of the high pressure difference small flow regulating valve of the present invention.
In the figure, 1 is a valve body, 2 is a valve seat, 3 is a valve core, 4 is a valve cover, 5 is a packing pad, 6 is packing, 7 is a packing pressing sleeve, 8 is a lining, 9 is a set screw, and 10 is a pneumatic actuator.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
The utility model provides a poor little flow control valve of high pressure, as figure 1, includes valve body 1, disk seat 2, case 3 and valve gap 4, and disk seat 2 installs in the inside of valve body 1, and the lower extreme of case 3 inserts the inside of disk seat 2, and the lower extreme processing of case 3 has two-way screw thread, and valve gap 4 installs the top surface at valve body 1, and case 3 passes the center of valve gap 4 and inserts in disk seat 2.
An oil passage is arranged in the valve body 1 and is communicated with the valve seat 2; the lower end of the valve core 3 is provided with a bidirectional thread, and the intersection part of the threads of the bidirectional thread enables a medium to reduce pressure; the valve core 3 is a cylinder with smooth surface.
Example 2
A high pressure difference small flow rate regulating valve, as shown in figure 1, is similar to embodiment 1 except that a packing pad 5 is installed between the upper part of a valve cover 4 and a valve core 3.
It is also possible that the packing pad 5 is filled with a packing 6.
Still further, the top end of the valve cover 4 is provided with a packing pressing sleeve 7, and the lower end of the packing pressing sleeve 7 extends into the valve cover 4 and is pressed on the packing 6.
Still further, the packing press sleeve 7 is connected with the valve cover 4 by a bolt.
Still further, the packing press sleeve 7 is of a T-shaped structure.
It is further possible that the valve slide 3 passes through the center of the packing gland 7.
Still further, at least two expansion cavities are formed in the inner wall of the valve seat 2 at the contact surface of the valve seat 2 and the inner wall of the valve core 3.
Still further, at least two sealing surfaces are arranged on the contact surface of the valve seat 2 and the inner wall of the valve core 3, and the expansion cavity and the sealing surfaces realize multiple-stroke pressure reduction.
Still further, install bush 8 between the bottom of valve gap 4 and case 3, bush 8 guarantees that case 3 avoids swinging by a wide margin in valve gap 4, and the structure is more stable.
It is further possible that the bushing 8 is locked in the valve cover 4 by means of a set screw 9.
It is still further possible that the bonnet 4 is connected to the valve body 1 by bolts.
It is still further possible that the central top surface of the valve body 1 is provided with a groove.
Still further, the center of valve gap 4 is provided with the boss, the boss inserts in the recess, the boss with the recess is interference fit, ensures that valve gap 4 is connected more firmly with valve body 1.
Still further, the lower end of the valve core 3 is a ball head, the ball head is inserted into a ball groove of the valve seat 2, and the ball head structure can better control flow.
Still further, the diameter of the lower end of the valve core 3 where the bidirectional thread is processed is larger than the diameters of other positions.
It is further possible that the upper end of the regulating valve is connected to a pneumatic actuator 10.
The working principle of the high-pressure-difference small-flow regulating valve is as follows: the medium can form pressure drop through a cavity such as a small hole formed by the thread and the valve seat 2, opposite impact can be formed at the intersection of the reverse threads to reduce the flow rate and the pressure, and energy is released at the expansion cavity to reduce the pressure again, for example, the pressure difference is 15 MPa; the size of the chamber, e.g. a small hole, formed by the thread and the valve seat 2 is small enough to ensure a sufficiently small flow of the medium through the regulating valve, e.g. to a flow of 100 kg/h.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (8)
1. The utility model provides a poor little flow control valve of high pressure, includes valve body (1), disk seat (2), case (3) and valve gap (4), its characterized in that, disk seat (2) are installed in the inside of valve body (1), and the inside of disk seat (2) is inserted to the lower extreme of case (3), and the lower extreme processing of case (3) has two-way thread line, and the top surface at valve body (1) is installed in valve gap (4), and valve gap (3) pass the center of valve gap (4) and insert in disk seat (2).
2. The high differential pressure small flow control valve according to claim 1, characterized in that a packing pad (5) is installed between the upper portion of the valve cover (4) and the valve core (3).
3. The high differential pressure small flow control valve according to claim 2, characterized in that the packing (6) is filled on the packing pad (5).
4. A high differential pressure small flow control valve according to claim 3, characterized in that the top end of the valve cover (4) is provided with a packing pressing sleeve (7), and the lower end of the packing pressing sleeve (7) extends into the valve cover (4) and is pressed on the packing (6).
5. The high differential pressure small flow control valve according to claim 4, characterized in that the packing press sleeve (7) is connected with the valve cover (4) by means of bolts.
6. The high pressure difference small flow regulating valve according to claim 1, characterized in that at least two expansion cavities are arranged on the inner wall of the valve seat (2) at the contact surface of the valve seat (2) and the inner wall of the valve core (3).
7. The high differential pressure small flow control valve according to claim 6, characterized in that at least two sealing surfaces are provided at the contact surface of the valve seat (2) and the inner wall of the valve core (3).
8. The high differential pressure small flow control valve according to claim 1, characterized in that a bushing (8) is installed between the bottom of the valve cover (4) and the valve core (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022952051.8U CN213871386U (en) | 2020-12-08 | 2020-12-08 | High-pressure-difference small-flow regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022952051.8U CN213871386U (en) | 2020-12-08 | 2020-12-08 | High-pressure-difference small-flow regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213871386U true CN213871386U (en) | 2021-08-03 |
Family
ID=77066299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022952051.8U Active CN213871386U (en) | 2020-12-08 | 2020-12-08 | High-pressure-difference small-flow regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213871386U (en) |
-
2020
- 2020-12-08 CN CN202022952051.8U patent/CN213871386U/en active Active
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