Cylindrical pressure reducing valve

Abstract

The utility model relates to a pressure reducing valve, and aims to provide a cylindrical pressure reducing valve which can improve the pressure reducing adjusting range and reduce the resistance of a temperature reducing water flow channel. According to the technical scheme, the cylindrical pressure reducing valve is characterized in that a valve seat comprises a cylindrical sleeve located below a valve rod and a plurality of stand columns vertically arranged on the inner side face of the bottom end of the cylindrical sleeve, and a distance is kept between every two adjacent stand columns; a valve port penetrating through the water outlet runner is formed in the center of the end face of the bottom end of the cylindrical sleeve, and a plurality of open holes penetrating through the water inlet runner are formed in the circumferential surface of the cylindrical sleeve; the valve clack can be vertically and movably positioned in the cylindrical sleeve, a plurality of blind holes which are provided with downward openings and are matched with the stand columns in an inserted and embedded mode in a one-to-one correspondence mode are formed in the valve clack, and therefore flow adjustment of the pressure reducing valve is achieved through vertical movement of the valve clack.

Description

Technical Field

[0001] The utility model relates to a pressure reducing valve, in particular to a columnar pressure reducing valve arranged on a temperature reducing and pressure reducing device. Background Art

[0002] CN201410652302.7 discloses a compensating sealed pressure reducing valve, including a valve body, a valve stem, a valve cover and a power mechanism; a steam inlet channel and a steam outlet channel are formed by partitioning inside the valve body, two valve seats are formed on the partition, and an upper valve flap and a lower valve flap are formed on the valve stem; the valve stem is characterized in that the valve stem is coaxially arranged by an upper valve stem with an upper valve flap and a lower valve stem with a lower valve flap, and a compensating structure is installed between the upper valve stem and the lower valve stem; the compensating structure includes a connector installed at the bottom of the upper valve stem, a connecting sleeve installed at the top of the lower valve stem and used to lock the connector, an elastic component positioned in the connecting sleeve to eliminate the axial spacing between the connector and the connecting sleeve, and a welding portion that fixes the connecting sleeve and the lower valve stem as one; the boss of the connector can be vertically slidably positioned in the cavity formed by the connecting sleeve and the lower valve stem. However, the pressure reducing adjustment range of the valve needs to be further improved. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to overcome the deficiencies of the above-mentioned background technology and provide a cylindrical pressure reducing valve, which can increase the pressure reducing adjustment range and reduce the resistance of the cooling water flow channel.

[0004] The technical solution provided by the utility model is:

[0005] A cylindrical pressure reducing valve, comprising a valve body with a water inlet flow channel and a water outlet flow channel arranged at the bottom, a valve stem vertically positioned in the valve body and movable up and down, a valve seat vertically arranged between the water inlet flow channel and the water outlet flow channel, a valve disc matched with the valve seat and fixedly connected to the bottom end of the valve stem, and an actuator located at the top end of the valve body to drive the valve stem;

[0006] The feature is that: the valve seat comprises a cylindrical sleeve located below the valve stem and a plurality of columns vertically arranged on the inner side surface of the bottom end of the cylindrical sleeve and maintaining a distance between adjacent columns; a valve port penetrating the water outlet channel is provided in the central portion of the bottom end surface of the cylindrical sleeve and a plurality of openings penetrating the water inlet channel are provided on the circumferential surface; the valve flap can be vertically movably positioned in the cylindrical sleeve, and a plurality of blind holes opening downwards and correspondingly and insertedly matched with the plurality of columns are provided on the valve flap, so that the flow regulation of the pressure reducing valve is realized by the up and down movement of the valve flap.

[0007] The plurality of columns are arranged in a plurality of annular rings in the cylindrical sleeve to provide necessary damping for the flow of the cooling water.

[0008] In the plurality of annular rings, the columns in adjacent annular rings are staggered in radial direction.

[0009] The columns in the plurality of annular rings are cylindrical.

[0010] In the plurality of annular rings, diameters of columns in adjacent annular rings are the same or different.

[0011] The beneficial effects of the utility model are:

[0012] 1. Since the cooling water is forced to flow in the space between the cooling columns, it not only has the effect of reducing the water pressure, but the arc surface of the column surface can also slow down or avoid the erosion of high pressure difference, thereby extending the service life.

[0013] 2. The diameter and number of each circle of columns can be designed separately according to design requirements, thus significantly expanding the scope of use of the pressure reducing valve.

[0014] 3. The valve opening is adjusted by driving the valve disc up and down through the actuator, which can effectively control the cooling water flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of an embodiment of the utility model.

[0016] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of the relationship between the middle valve seat and the valve disc.

[0017] Figure 3 yes Figure 2 Schematic diagram of the structure of the middle valve seat (for clarity of the drawing, the column only shows the cross-section part).

[0018] Figure 4 yes Figure 3 Schematic diagram of the structure from a top-down perspective.

[0019] Figure 5 yes Figure 2 Schematic diagram of the structure of the valve disc.

[0020] Numbers in the figure: actuator 1, valve stem 2, valve cover 3, valve body 4, water inlet channel 5, water outlet channel 6, cylindrical sleeve 7, valve disc 8, column 9, blind hole 10, opening 11, valve port 12. DETAILED DESCRIPTION

[0021] The following is a further description with reference to the embodiments shown in the accompanying drawings.

[0022] The cylindrical pressure reducing valve shown in the accompanying drawings comprises a valve body 4 with an inlet channel 5 and an outlet channel 6 at the bottom, a valve stem 2 vertically positioned in the valve body so as to be movable up and down, a valve seat vertically arranged between the inlet channel and the outlet channel, a valve flap 3 cooperating with the valve seat and fixedly connected to the bottom end of the valve stem, and an actuator 1 (usually a motor-driven speed reduction mechanism) located at the top end of the valve body for driving the valve stem; the above structures are similar to those of existing pressure reducing valves.

[0023] The improvement of the utility model is as follows: in the valve seat, the cylindrical sleeve 7 is located below the valve stem and has an open top and a bottom end face that covers the water outlet flow channel. A plurality of columns 9 are vertically arranged on the inner side surface of the bottom end of the cylindrical sleeve and keep a distance between adjacent columns (the distance between adjacent columns is used as the flow space of the cooling water). A valve port 12 that passes through the water outlet flow channel is provided at the central part of the bottom end face of the cylindrical sleeve, and a plurality of openings 11 that pass through the water inlet flow channel are provided on the circumferential surface; the valve flap can be positioned vertically in the cylindrical sleeve, and a plurality of blind holes 10 (so it can be called a cylindrical valve flap) that open downward and are correspondingly inserted and matched with the plurality of columns are provided on the valve flap, so that the flow regulation of the pressure reducing valve is realized by the up and down movement of the valve flap. The diameter of the blind hole should be slightly larger (recommended to be larger than 0.5 mm) than the diameter of the corresponding matching column, so that the fluid in the blind hole can be quickly released into the valve seat through the gap between the blind hole and the column during operation to avoid generating additional movement resistance.

[0024] Depend on Figure 4 It can be seen that the plurality of columns are arranged in a plurality of annular rings in the cylindrical sleeve to provide the required damping for the flow of the cooling water.

[0025] As a recommendation: among the several annular rings, the columns in adjacent annular rings are arranged in a radially staggered manner to force the cooling water to flow in a curved manner, thereby increasing the pressure reduction effect.

[0026] The columns in the plurality of annular rings are cylindrical to reduce the scouring damage of the high-pressure cooling water.

[0027] In the plurality of annular rings, diameters of columns in adjacent annular rings are the same or different.

[0028] The working principle of the utility model is that when working, the cooling water in the water inlet channel enters the valve seat from the outside to the inside and can only flow through the space between the columns, so the water pressure is reduced; the flow rate of the cooling water can be controlled by the opening size of the valve, and the arc surface of the column surface can slow down or avoid the scouring of the high pressure difference, thereby extending the service life.

Claims

1. A cylindrical pressure reducing valve, comprising a valve body (4) with a water inlet channel (5) and a water outlet channel (6) arranged at the bottom, a valve stem (2) vertically positioned in the valve body and movable up and down, a valve seat vertically arranged between the water inlet channel and the water outlet channel, a valve flap (3) cooperating with the valve seat and fixedly connected to the bottom end of the valve stem, and an actuator (1) located at the top end of the valve body and driving the valve stem; Features: The valve seat comprises a cylindrical sleeve (7) located below the valve stem and a plurality of columns (9) vertically arranged on the inner side surface of the bottom end of the cylindrical sleeve and spaced apart from each other; a valve port (12) penetrating the water outlet channel is provided at the central portion of the bottom end surface of the cylindrical sleeve, and a plurality of openings (11) penetrating the water inlet channel are provided on the circumferential surface; the valve flap is vertically movable and positioned in the cylindrical sleeve, and a plurality of blind holes (10) opening downward and correspondingly engaged with the plurality of columns are provided on the valve flap, so that the flow rate of the pressure reducing valve can be adjusted by the up and down movement of the valve flap.

2. The cylindrical pressure reducing valve according to claim 1, Features: The plurality of columns are arranged in a plurality of annular rings in the cylindrical sleeve to provide necessary damping for the flow of the cooling water.

3. The cylindrical pressure reducing valve according to claim 2, Features: In the plurality of annular rings, the columns in adjacent annular rings are staggered in radial direction.

4. The cylindrical pressure reducing valve according to claim 3, Features: The columns in the plurality of annular rings are cylindrical.

5. The cylindrical pressure reducing valve according to claim 4, Features: In the plurality of annular rings, diameters of columns in adjacent annular rings are the same or different.

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